JP2018042094A - Display device - Google Patents

Abstract

[Problem] To provide a display device that can suppress deterioration of waterproofing caused by water accumulated in gaps near joints of a housing or water passing through the gaps. [Solution] The display device 2 includes an image forming unit, a housing 21 having a first opening through which image light is emitted to the left, a pressing member 24 covering the left side of the housing 21, an elastic member 25 interposed between the housing 21 and the pressing member 24, a hole 27 that communicates with a clamping portion sandwiched between the pressing member 24 and the housing 21 and extends toward the outside of the housing, and a groove 22 provided on the outer surface of the housing 21, extending in the front-rear direction, and partially communicating with the hole 27. The hole 27 communicates with an end 222 of the groove 22. The end 221 of the groove 22 is located below the communicating portion. [Selected Figure] Figure 2

Description

  The present invention relates to a display device that is used while being held in front of a user's eyes.

  In a head-mounted display (hereinafter referred to as “HMD”), a structure for preventing water from entering the inside of a housing that houses a display unit, an optical system, and the like has been proposed. For example, the HMD described in Patent Document 1 seals a video display device or the like housed in the housing from the outside by sealing a joint of the housing made of a pair of transparent members with a packing.

JP 2009-65310 A

  When the seam of the housing is sealed by a seal member such as packing, water tends to accumulate in a gap formed in the vicinity of the seam. In this case, there is a problem that the gap is widened by an impact when the HMD is dropped, and the water accumulated in the gap may enter the inside of the housing.

  The objective of this invention is providing the display apparatus which can suppress the fall of the waterproofing property by the water collected in the clearance gap near the joint of a housing | casing, or the water which passes a clearance gap.

  The display device according to the present invention includes an image forming unit that forms an image, a housing that houses the image forming unit therein, and has a first opening through which image light of the image is emitted in a first direction. A cover member that covers at least a part of the casing on the first direction side, an interposition member having an interposition part interposed between the casing and the cover member, and sandwiched between the cover member and the casing. A hole that extends toward the outside of the housing, communicates with the sandwiched portion, and extends toward the second direction opposite to the first direction. A display device comprising a groove portion that communicates with a hole portion, wherein a transparent portion that covers the first opening is formed in at least one of the covering member and the interposition member, and a first portion on the first direction side of the groove portion. One end of the hole in the third direction orthogonal to the first direction and the second direction The second end of the groove portion on the second direction side is the same as the hole portion in a fourth direction opposite to the third direction. It arrange | positions rather than a position or the said hole part in the said 4th direction side, It is characterized by the above-mentioned.

  In the display device according to the present invention, the first opening of the housing is covered with the transparent portion of at least one of the covering member and the interposed member, thereby preventing water from entering the housing through the first opening. . For this reason, it is possible to suppress the influence of water on the image forming unit accommodated in the housing. Further, in the display device, the water accumulated in the holding portion can be discharged to the outside of the housing through the hole portion. Furthermore, the display device can guide the discharged water by a groove provided on the outer surface of the housing. For this reason, the display device can prevent the cover member from being displaced due to an impact at the time of dropping, and the water accumulated in the sandwiching portion and the water passing through the sandwiching portion from entering the housing. Therefore, the display device can suppress a decrease in waterproofness due to water accumulated in the sandwiching portion or water passing through the sandwiching portion.

It is a perspective view of HMD1A. 4 is a perspective view of a display device 2. FIG. 3 is an exploded perspective view of the display device 2. FIG. It is sectional drawing which looked at the BB line of FIG. 2 from the arrow direction. It is a figure for demonstrating 1st angle (theta) 1 and 2nd angle (theta) 2. FIG. 3 is an exploded perspective view of the display device 2. FIG. It is sectional drawing which looked at the BB line of FIG. 2 from the arrow direction. 3 is an exploded perspective view of the display device 3. FIG. It is sectional drawing (A) which looked at CC line of FIG. 8 from the arrow direction, and sectional drawing (B) which looked at DD line of FIG. 8 from the arrow direction. 4 is an exploded perspective view of a display device 4. FIG. It is sectional drawing which looked at the EE line | wire of FIG. 10 from the arrow direction. 3 is an exploded perspective view of the display device 5. FIG. It is sectional drawing which looked at the FF line | wire of FIG. 12 from the arrow direction. 3 is an exploded perspective view of a display device 6. FIG. It is sectional drawing which looked at the GG line of FIG. 14 from the arrow direction. FIG. 7 is an exploded perspective view of the display device 7. It is sectional drawing which looked at the HH line | wire of FIG. 16 from the arrow direction. 3 is an exploded perspective view of a display device 8. FIG. It is sectional drawing which looked at the II line | wire of FIG. 18 from the arrow direction. It is a perspective view of HMD1B.

  A first embodiment of the present invention will be described. As shown in FIG. 1, a head mounted display (hereinafter referred to as “HMD”) 1A is a video transmission type HMD. The HMD 1 </ b> A includes a mounting tool 11, a connecting tool 12, and a display device 2. Hereinafter, in order to help understand the description of the figure, the upper side, lower side, left side, right side, front side, and rear side of the HMD 1A are defined. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the HMD 1A correspond to, for example, the upper side, the lower side, the left diagonal upper side, the right diagonal lower side, the left side, and the right side in FIG. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the HMD 1A correspond to the upper side, the lower side, the right side, the left side, the front side, and the rear side, respectively, for the user wearing the wearing tool 11. .

<Mounting tool 11, connecting tool 12>
As shown in FIG. 1, the mounting tool 11 is made of a flexible material such as resin or metal (for example, stainless steel). The mounting tool 11 includes a first portion 11A and second portions 11B and 11C. In the following, in order to facilitate understanding, the mounting tool 11 will be described by dividing it into a first part 11A and second parts 11B and 11C. However, the mounting tool 11 has a first part 11A and a second part 11B. , 11C are not divided into individual members, and are integrated members as a whole.

  Each of the first portion 11A and the second portions 11B and 11C is a curved and elongated plate-like member. The first portion 11 </ b> A extends in the left-right direction between the position 112 and the position 113 in the wearing tool 11. The first portion 11A is curved convexly toward the front side. The position 112 is located on the left side of the center 111 in the left-right direction of the wearing tool 11. The position 113 is located on the right side of the center 111 in the left-right direction of the wearing tool 11. The second portion 11 </ b> B extends rearward from the position 112 in the wearing tool 11. The second portion 11 </ b> C extends rearward from the position 113 in the wearing tool 11. The second portions 11B and 11C each extend in a direction in which the rear ends approach each other. The wearing tool 11 is worn on the user's head with the first part 11A, the second part 11B, and 11C in contact with the frontal, right and left heads of the user, respectively. Is done.

The connector 12 is substantially rod-shaped. The connector 12 is made of resin or metal. The connector 12 extends in the up-down direction when viewed from the front. The upper end portion of the connector 12 is connected to the mounting tool 11 via the ball joint 13 and the connection member 14. A lower end portion of the connector 12 is connected to the display device 2 via a ball joint 15. The housing 21 of the display device 2 is connected to the mounting tool 11 via the connecting tool 12. The connector 12 can arrange | position the display apparatus 2 in the front side of a user's left eye in the state with which the mounting tool 11 was worn by the user's head.
<Display device 2>
The display device 2 will be described. The display device 2 includes a liquid crystal panel 10B, a cable 10C, a housing 21, a pressing member 24, and an elastic member 25 (see FIG. 3). Hereinafter, in order to facilitate understanding, the HMD 1A is based on the state in which the display device 2 is disposed in front of the left eye of the user (the state in FIG. 1, hereinafter referred to as “use state”). Each direction (upper side, lower side, left side, right side, front side, and rear side) is also applied to the display device 2.

<Case 21>
The casing 21 has a substantially box shape. The housing | casing 21 has wall surface 21F, 21R, 21U, 21L, 21D, 21E (refer FIG. 3). The wall surfaces 21F, 21R, 21U, 21L, 21D, and 21E correspond to the left, right, upper, lower, front, and rear wall surfaces of the housing 21, respectively. Each of the wall surfaces 21F, 21R, 21U, and 21L has a curved plate shape. As shown in FIGS. 2 and 3, the substantially central portions of the wall surfaces 21 </ b> U and 21 </ b> L slightly protrude above and below the left and right ends, respectively. Each of the substantially central portions in the vertical direction of the wall surfaces 21F and 21R slightly protrudes to the left and right sides from both ends in the vertical direction. As shown in FIG. 3, the wall surfaces 21D and 21E have a flat plate shape.

  The rear end 212U of the wall surface 21U is disposed below the front end 211U. The wall surface 21U is inclined obliquely downward from the end 211U toward the end 212U. As shown in FIG. 2, the front end portion 211L of the wall surface 21L is disposed below the rear end portion 212L. The wall surface 21L is inclined obliquely downward from the end 212L toward the end 211L.

  As shown in FIG. 2, a groove 22 is formed at the substantially central portion in the left-right direction of the outer surface of the wall surface 21 </ b> L. The groove portion 22 extends linearly in the front-rear direction across the end portions 211L and 212L of the wall surface 21L. The groove 22 has a left groove wall 22A and a right groove wall 22B. As described above, the wall surface 21L is inclined obliquely downward from the end 212L toward the end 211L. For this reason, the front end 221 of the groove 22 is disposed below the rear end 222 of the groove 22. The width between the groove walls 22 </ b> A and 22 </ b> B of the groove part 22, more specifically, the length in the left-right direction between the groove walls 22 </ b> A and 22 </ b> B gradually increases from the end part 221 toward the end part 222. The width between the groove walls 22 </ b> A and 22 </ b> B is the largest at the end portion 222 and the smallest at the end portion 221.

  As shown in FIG. 2, the rear end 212F of the wall surface 21F is arranged on the right side of the front end 211F. The wall surface 21F is inclined diagonally rightward from the end 211F toward the end 212F. As shown in FIG. 1, the front end 211R of the wall surface 21R is disposed on the right side of the rear end 212R. The wall surface 21R is inclined obliquely rightward from the end 212R toward the end 211R.

  The ball joint 15 is connected to the wall surface 21R. The casing 21 is connected to the coupler 12 via the ball joint 15 on the wall surface 21R. The cable 10C passes through a hole (not shown) provided above the portion of the wall surface 21R to which the ball joint 15 is connected. A portion of the cable 10C that penetrates the wall surface 21R is disposed above the wall surface 21L. For this reason, the part which penetrates wall surface 21R among cables 10C is arrange | positioned above the edge part 221 (refer FIG. 2) of the groove part 22. FIG.

  One end side of the cable 10 </ b> C is disposed inside the housing 21. One end of the cable 10 </ b> C is electrically connected to the liquid crystal panel 10 </ b> B inside the housing 21. The other end side of the cable 10C is exposed to the outside of the housing 21 from the wall surface 21R. The other end of the cable 10C is electrically connected to an external device (not shown). The external device is, for example, a control box that performs control for displaying an image on the liquid crystal panel 10B. The cable 10C electrically connects the liquid crystal panel 10B and an external device.

  As shown in FIG. 3, the wall surface 21E includes a first opening 23A, a first protrusion 23B, a second protrusion 23C, and a third protrusion 23D. The first opening 23A is a rectangle that is long in the left-right direction. The first protrusion 23B includes a first protrusion 23B on the upper side of the first opening 23A, a first protrusion 23B on the lower side, a first protrusion 23B on the left side, and a first protrusion 23B on the right side of the wall surface 21E. . The third protrusion 23D extends in the vertical direction at the right end of the wall surface 21E.

  The second protrusion 23C protrudes outward from the rear end of the first protrusion 23B. The left first protrusion 23B is provided with one left second protrusion 23C that extends from the upper end to the lower end and protrudes to the left. The upper first projecting portion 23B is provided with three upper second projecting portions 23C that are arranged in the left-right direction with a space therebetween and project upward. The lower first protrusion 23B is provided with three lower second protrusions 23C that are arranged in the left-right direction with a space between each other and protrude downward. The second protrusions 23C on the upper side and the lower side are provided on the left side portion, the substantially center in the left-right direction, and the right side portion of the first protrusion 23B.

<Liquid crystal panel 10B>
The liquid crystal panel 10 </ b> B is accommodated in the housing 21. The liquid crystal panel 10B displays an image on the display surface 101B based on a signal received from an external device via the cable 10C. The display surface 101B faces the rear side. The image light of the image displayed on the display surface 101B is emitted toward the rear side. The image light passes through the first opening 23A of the housing 21 from the front side toward the rear side.

<Elastic member 25>
The elastic member 25 is made of a soft resin material that is softer than the pressing member 24 described later. The elastic member 25 is a transparent member having flexibility. The elastic member 25 is a substantially rectangular shape that is long in the left-right direction. The elastic member 25 is slightly larger in the left-right direction and the up-down direction than the first opening 23A of the housing 21 and the second opening 24D of the pressing member 24 described later.

<Pressing member 24>
The pressing member 24 is made of a hard material that is harder than the elastic member 25. The pressing member 24 has a base 24A, a first protrusion 24B, and a second protrusion 24C. The base 24A has a flat plate shape. The base 24A has a second opening 24D. The second opening 24D is a rectangle that is long in the left-right direction. The shape of the second opening 24D is substantially the same as the shape of the first opening 23A of the housing 21. The first protrusion 24B protrudes from the upper end of the base 24A to the front, the upper first protrusion 24B, from the lower end to the front, and from the left end to the front. The left first protrusion 24B is provided. As shown in FIG. 2, a notch 240B is formed at the approximate center in the left-right direction of the front end portion of the lower first protrusion 24B. The notch 240B has a rectangular shape. The front end portion of the lower first protrusion 24B is recessed rearward by the notch 240B.

  As shown in FIG. 3, the second protrusion 24C protrudes inward from the front end of the first protrusion 24B. The upper first protrusion 24B is provided with three upper second protrusions 24C (not shown) that are arranged in the left-right direction with a space between each other and protrude downward. The lower first projecting portion 24B is provided with four lower second projecting portions 24C that are arranged in the left-right direction at intervals and project upward. The left first protrusion 24B is provided with one left second protrusion 24C that extends from the upper end to the lower end and protrudes to the right.

  The pressing member 24 is engaged with the housing 21 through the following steps (arrows Y21 and Y22). First, the elastic member 25 is disposed on the rear side of the wall surface 21 </ b> E of the casing 21 so that the central portion of the elastic member 25 covers the first opening 23 </ b> A of the casing 21 from the rear side. Hereinafter, the rectangular central portion that covers the first opening 23 </ b> A of the elastic member 25 is referred to as “first covering portion 25 </ b> A”. A portion of the elastic member 25 excluding the first cover portion 25A comes into contact with the rear end portions of the first protrusion portion 23B and the second protrusion portion 23C of the housing 21 from the rear side. Hereinafter, the frame-shaped portion of the elastic member 25 excluding the first cover portion 25A is referred to as “intervening portion 25B”.

  Next, the pressing member 24 is disposed on the rear side of the elastic member 25. The pressing member 24 is disposed slightly on the left side with respect to the housing 21 so that the second protruding portion 24C of the pressing member 24 and the second protruding portion 23C of the housing 21 are staggered. Next, the casing 21 is moved to the rear side (arrow Y21). The base 24A of the pressing member 24 contacts the elastic member 25.

  Next, the pressing member 24 is moved to the right side (arrow Y22). As shown in FIG. 4, the second protrusion 24C of the pressing member 24 enters the gap between the wall surface 21E of the housing 21 and the second protrusion 23C. The second protrusion 23C of the housing 21 enters the gap between the base 24A of the pressing member 24 and the second protrusion 24C. The right ends of the upper first protrusion 24B (see FIG. 3) and the lower first protrusion 24B (see FIG. 2) of the pressing member 24 are on the left side of the third protrusion 23D of the housing 21. The right side of the pressing member 24 is restricted. The base 24A of the pressing member 24 covers the wall surface 21E of the housing 21 from the rear side. Thus, the pressing member 24 is engaged with the housing 21.

  As shown in FIG. 4, the interposition part 25 </ b> B (see FIG. 3) of the elastic member 25 is sandwiched from both the front and rear sides while being arranged between the base 24 </ b> A of the pressing member 24 and the first protrusion 23 </ b> B of the housing 21. And compressed. Hereinafter, the contact surface between the first protrusion 23 </ b> B of the housing 21 and the elastic member 25 is referred to as “first contact surface 251”. A contact surface between the base 24A of the pressing member 24 and the elastic member 25 is referred to as a “second contact surface 252”. Since the elastic member 25 has elasticity, the interposition part 25B tends to expand from the compressed state to the original state. For this reason, the interposition part 25 </ b> B of the elastic member 25 is in close contact with the casing 21 at the first contact surface 251, and is in close contact with the pressing member 24 at the second contact surface 252.

  Hereinafter, the frictional force on the first contact surface 251 is referred to as “first frictional force (F21)”. The pressure loss at the first contact surface 251 is referred to as “first pressure loss (P21)”. The frictional force on the second contact surface 252 is referred to as “second frictional force (F22)”. The pressure loss at the second contact surface 252 is referred to as “second pressure loss (P22)”. Here, the friction coefficient μ21 of the contact surface of the casing 21 that contacts the elastic member 25 at the first contact surface 251 is greater than the friction coefficient μ22 of the contact surface of the pressing member 24 that contacts the elastic member 25 at the second contact surface 252. Each surface is processed so as to be larger (μ21> μ22). For this reason, the first friction force is larger than the second friction force (F21> F22). Further, the first pressure loss is larger than the second pressure loss (P21> P22).

  A force toward the rear side acts on the pressing member 24 in response to the intermediate portion 25B of the compressed elastic member 25 trying to expand. On the other hand, the rearward movement of the pressing member 24 is restricted by the second protruding portion 24C of the pressing member 24 coming into contact with the second protruding portion 23C of the housing 21 from the front side. That is, a force that is pressed toward the casing 21 is relatively applied to the pressing member 24. Hereinafter, the contact surface between the second protrusion 23C of the housing 21 and the second protrusion 24C of the pressing member 24 is referred to as a “third contact surface 253”. The pressure loss in the submerged path from the third contact surface 253 or the outside to the first contact surface 251 is referred to as “third pressure loss (P23)”. Here, the elastic member 25 having flexibility and the housing 21 are in close contact with each other on the first contact surface 251, whereas the housing 21 having relatively small flexibility is provided on the third contact surface 253. And the pressing member 24 are in close contact with each other. For this reason, the adhesiveness between the pressing member 24 and the housing 21 on the third contact surface 253 is smaller than the adhesiveness between the elastic member 25 and the housing 21 on the first contact surface 251. For this reason, the third pressure loss is smaller than the first pressure loss (P21> P23).

  A sandwiching portion 26 is formed in a portion sandwiched between the pressing member 24 and the casing 21. The clamping portion 26 includes a base 24A, a first protrusion 24B, and a second protrusion 24C of the pressing member 24, a first protrusion 23B and a second protrusion 23C of the housing 21, and an elastic member 25. It is a closed space surrounded by. The sandwiching portion 26 is formed in a frame shape that covers the outside of the first opening 23A and the second opening 24D.

  As shown in FIG. 2, the hole 27 is formed by the notch 240 </ b> B of the pressing member 24 and the wall surface 21 </ b> E (see FIG. 3) of the housing 21. As shown in FIG. 4, the upper end portion of the hole portion 27 communicates with the clamping portion 26. The hole portion 27 extends from the sandwiching portion 26 toward the outside of the housing 21. As shown in FIG. 2, the lower end portion of the hole portion 27 communicates with the end portion 222 of the groove portion 22. The lower end portion of the hole portion 27 is disposed at the same position as the end portion 222 of the groove portion 22 in the vertical direction. The hole 27 is disposed on the front side in the front-rear direction with respect to the first contact surface 251 and the second contact surface 252. When a virtual plane extending along the first contact surface 251 is defined, the virtual plane and the hole 27 do not intersect. The same applies to the relationship between the second contact surface 252 and the hole 27. For this reason, in FIG. 4, the virtual plane and the hole 27 are arranged at positions separated in the front-rear direction.

<Use example of HMD1A>
An example of usage of the HMD 1A will be described. First, the user fixes the wearing tool 11 of the HMD 1A to the head. The user holds the display device 2 and the connector 12 and adjusts the position so that the pressing member 24 of the display device 2 is disposed to face the front side of the left eye. At this time, the ball joints 13 and 15 can arrange the display device 2 at an appropriate position with respect to the wearing tool 11.

  As shown in FIG. 3, a signal is output from the external device to the liquid crystal panel 10B of the display device 2 via the cable 10C. An image is displayed on the display surface 101B of the liquid crystal panel 10B. The image light of the displayed image is emitted to the rear side toward the first opening 23 </ b> A of the housing 21. The first opening 23 </ b> A is covered at the rear side by the first cover portion 25 </ b> A of the transparent elastic member 25. For this reason, the image light that has passed through the first opening 23A to the rear side passes through the first cover portion 25A to the rear side. The image light transmitted through the first cover portion 25A further passes through the second opening 24D of the pressing member 24 to the rear side. The image light is incident on the left eye of the user. Thereby, the user recognizes the image.

  As shown in FIG. 5A, the end 212U of the wall surface 21U is arranged below the end 211U in a state where the display device 2 is arranged so that the image light is emitted in the horizontal direction. . The wall surface 21U is inclined obliquely downward from the end 211L toward the end 212L. Further, the end portion 211L of the wall surface 21L is disposed below the end portion 212L. The wall surface 21L is inclined obliquely downward from the end 212L toward the end 211L. Hereinafter, the direction in which the image light is emitted is referred to as “exit direction S”. A virtual plane in contact with the wall surface 21L is referred to as a “virtual plane T”. An angle formed between the emission direction S and the virtual plane T is referred to as a “first angle” and is expressed as θ1. In detail, the wall surface 21L is curved. For this reason, many virtual planes T which contact the wall surface 21L also exist according to the position of a contact. The first angle θ1 is defined for each virtual plane T.

  The rotation of the ball joint 15 connecting the connector 12 and the housing 21 around the left-right direction is limited to a predetermined angle range (hereinafter referred to as “second angle θ2”). Details are as follows. FIG. 5B shows a state in which the display device 2 is most rotated counterclockwise when viewed from the left side. In this case, the emission direction S of the image light emitted from the display device 2 extends in the horizontal direction toward the rear side. On the other hand, FIG. 5C shows a state in which the display device 2 is most rotated in the clockwise direction when viewed from the left side. In this case, the emission direction S of the image light emitted from the display device 2 is inclined rearward and obliquely downward with respect to the horizontal direction. An angle formed between the emission direction S in FIG. 5B and the emission direction S in FIG. 5C is a second angle θ2 that is an angle range in which the ball joint 15 can rotate. Here, in the HMD 1B, the inclination angle of the wall surface 21L and the rotatable angle range of the ball joint 15 are adjusted so that the first angle θ1 is larger than the second angle θ2.

<Main effects of the first embodiment>
The display device 2 of the HMD 1A prevents water from entering the inside of the casing 21 through the first opening 23A by covering the first opening 23A of the casing 21 with the elastic member 25. For this reason, it can suppress that the influence of water reaches liquid crystal panel 10B accommodated in the housing | casing 21. FIG. Further, the water that has flowed to the end portion 212 </ b> U side through the wall surface 21 </ b> U of the display device 2 may enter the holding portion 26 between the housing 21 and the pressing member 24. On the other hand, in the display device 2, the water accumulated in the holding part 26 can be discharged to the outside of the housing 21 through the hole part 27. Further, the display device 2 can guide the discharged water to the end 211U side by the groove 22 provided on the wall surface 21U of the housing 21. For this reason, the display device 2 can prevent the elastic member 25 from being displaced due to the impact at the time of dropping, and the water accumulated in the clamping unit 26 or the water passing through the clamping unit 26 from entering the inside of the housing 21. Therefore, the display device 2 can suppress a decrease in waterproofness due to water accumulated in the clamping unit 26 or water passing through the clamping unit 26.

  In addition, in the display apparatus 2, when the water accumulated in the clamping part 26 is not discharged | emitted, depending on a condition, the accumulated water may rot or mold. In this case, the sanitary environment of HMD1A deteriorates. Since HMD1A is used while being held in front of the user's eyes, the deterioration of the sanitary environment is not particularly preferable. On the other hand, in the display device 2, the water accumulated in the sandwiching portion 26 can be discharged through the hole portion 27, so that the accumulated water can be prevented from rotting or moldy. For this reason, the display apparatus 2 can maintain a sanitary environment favorably.

  In the display device 2, the end portion 222 of the groove portion 22 communicates with the hole portion 27. Further, the end portion 221 of the groove portion 22 is disposed below the end portion 222. Here, the end 222 is close to the user, and the end 221 is separated from the user. When water flows to the end 212U side through the wall surface 21U of the display device 2, the water approaches a position close to the user. In this case, since it may affect a user's visibility by dripping water so that the 1st opening 23A and the 2nd opening 24D may cross, it is not preferable.

  On the other hand, the clamping part 26 is formed in a frame shape that covers the outside of the first opening 23A and the second opening 24D. For this reason, the clamping unit 26 guides the water that has flowed to the end 212U side through the wall surface 21U of the display device 2 downward toward the wall surface 21L, and discharges the water from the hole 27 to the outside of the housing 21. it can. Further, since the lower end portion of the hole portion 27 communicates with the end portion 222 of the groove portion 22, the discharged water can be guided to the groove portion 22. Furthermore, the groove part 22 can flow water in the direction away from the user. In this manner, the display device 2 uses the sandwiching portion 26 to prevent the water flowing along the wall surface 21U of the display device 2 from flowing toward the end portion 212U from dripping so that the water crosses the first opening 23A and the second opening 24D. Can be suppressed. Furthermore, when water is discharged from the pinching portion 26 through the hole portion 27, it is possible to prevent the water from dripping in the vicinity of the user. Therefore, the display device 2 can suppress a decrease in the visibility of the user due to water adhering to the housing 21.

  The elastic member 25 of the display device 2 has flexibility. For this reason, when pressed against the housing 21 by the pressing member 24, the interposition part 25 </ b> B of the elastic member 25 is compressed and deformed, and is in close contact with the housing 21 and the pressing member 24. For this reason, the display device 2 can achieve high waterproofness by the elastic member 25.

  The elastic member 25 of the display device 2 is transparent, and covers the first opening 23A of the housing 21 with the first cover portion 25A. For this reason, the elastic member 25 can suppress the penetration of water into the housing 21 by the interposition part 25B at the same time as allowing the image light to pass through the first cover part 25A. For this reason, the display device 2 can achieve high waterproofness by the elastic member 25 without separately providing a seal member or the like for enhancing waterproofness between the housing 21 and the pressing member 24.

  In the display device 2, the hole 27 is disposed on the front side of the first contact surface 251 where the casing 21 and the elastic member 25 are in contact with each other and the second contact surface 252 where the pressing member 24 and the elastic member 25 are in contact with each other. Is done. Further, a third contact surface 253 where the housing 21 and the pressing member 24 are in contact is interposed between the first contact surface 251 and the second contact surface 252 and the hole portion 27. For this reason, the display device 2 can prevent water from entering the inside of the housing 21 through the first contact surface 251 even when water enters from the outside through the hole 27.

  In the display device 2, a portion that penetrates the wall surface 21 </ b> R of the cable 10 </ b> C that connects the external device and the liquid crystal panel 10 </ b> B is disposed above the end 221 of the groove 22. In this case, the water that has flowed to the end portion 221 via the groove portion 22 hangs down as it is, so that the water hangs down and contacts the cable 10C side, or through the gap between the cable 10C and the housing 21. Intrusion into the housing 21 can be suppressed.

  The width between the groove walls 22 </ b> A and 22 </ b> B of the groove portion 22 gradually increases from the end portion 221 toward the end portion 222. In this case, the water discharged through the hole portion 27 easily flows from the end portion 222 toward the end portion 221 through the groove portion 22 by capillary action. Therefore, the display device 2 can efficiently flow water toward the end portion 221 along the groove portion 22.

  In the display device 2, the first frictional force on the first contact surface 251 where the casing 21 and the elastic member 25 are in contact is greater than the second frictional force on the second contact surface 252 where the pressing member 24 and the elastic member 25 are in contact. Is also large (F21> F22). In this case, the housing 21 and the elastic member 25 are unlikely to be displaced in the process in which the pressing member 24 is engaged with the housing 21. For this reason, when the display device 2 is assembled, the elastic member 25 can be prevented from sliding with respect to the housing 21. Accordingly, when the display device 2 is assembled, it is possible to suppress the portion of the elastic member 25 that contacts the housing 21 from being damaged, and thus high waterproofness can be realized.

  In the display device 2, the first pressure loss at the first contact surface 251 is larger than the second pressure loss at the second contact surface 252 and the third pressure loss at the third contact surface 253 (P21> P22, P21>). P23). In this case, when water passes through the first contact surface 251 where the casing 21 and the elastic member 25 are in contact, water passes through the second contact surface 252 where the pressing member 24 and the elastic member 25 are in contact. This is larger than the energy loss when water passes through the third contact surface 253 where the casing 21 and the pressing member 24 come into contact. Accordingly, the water accumulated in the sandwiching portion 26 is easier to pass through the second contact surface 252 and the third contact surface 253 than the first contact surface 251. Therefore, the display device 2 can maintain the waterproof property of the first contact surface 251 in a state higher than the waterproof property of the second contact surface 252 and the third contact surface 253. The display device 2 not only discharges the water accumulated in the holding portion 26 to the outside of the housing 21 through the third contact surface 253 and the hole portion 27, but also allows the water in the housing 21 to pass through the second contact surface 252. It can also be discharged to the outside.

  In the HMD 1A, the wall surface 21U is inclined downward as it goes from the side away from the user to the side closer to the user. For this reason, the water which propagates the wall surface 21U of the display apparatus 2 flows in the direction close | similar to a user. However, the display device 2 can guide water downward toward the wall surface 21L via the sandwiching portion 26 (see FIG. 4). For this reason, the display apparatus 2 can suppress that the water which flows along the wall surface 21U droops so that the 1st opening 23A, 2nd opening 24D, etc. which are the passageways of image light may cross, and worsens visibility.

  In the display device 2, the wall surface 21 </ b> L is inclined downward as it goes away from the side closer to the user. In the HMD 1B, the inclination angle of the wall surface 21L and the rotatable angle range of the ball joint 15 are adjusted so that the first angle θ1 is larger than the second angle θ2. For this reason, even when the angle of the housing 21 with respect to the connector 12 is changed, the HMD 1B can tilt the wall surface 21L of the housing 21 downward from the end portion 222 toward the end portion 221. In this case, the water discharged to the groove part 22 from the clamping part 26 via the hole part 27 (refer FIG. 4) can be flowed toward the side separated from the side close | similar to a user. Therefore, the display device 2 can always suppress a decrease in the visibility of the user due to water adhering to the casing 21 regardless of the use state of the display device 2.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in that an adhesive member 28 is newly provided. Other configurations are the same as those of the first embodiment. Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 6, the adhesive member 28 has a rectangular plate shape. The adhesive member 28 has a rectangular opening 28A as a center. The size of the opening 28A is larger than the size of the first opening 23A of the housing 21. Each surface of the adhesive member 28 faces in the front-rear direction. Both surfaces of the adhesive member 28 are adhesive.

  As shown in FIG. 7, a part of the first contact surface 251 between the housing 21 and the elastic member 25 is bonded by the adhesive member 28. In this case, the first frictional force on the first contact surface 251 is larger than the first frictional force when the adhesive member 28 is not provided. For this reason, the 1st frictional force becomes still larger than the 2nd frictional force (F21 >> F22). In addition, the first pressure loss at the first contact surface 251 is larger than the first pressure loss when the adhesive member 28 is not provided. For this reason, the first pressure loss is larger than the second pressure loss and the third pressure loss (P21 >> P22, P21 >> P23).

<Operation and Effect of Second Embodiment>
As described above, the casing 21 and the elastic member 25 are bonded to each other by the adhesive member 28, thereby causing a shift between the casing 21 and the elastic member 25 when the pressing member 24 is engaged with the casing 21. Further suppression is possible. For this reason, since it can suppress that the part which contacts the housing | casing 21 among the elastic members 25 is damaged, high waterproofness is realizable. Furthermore, since the elastic member 25 can be fixed to the casing 21 by the adhesive member 28, the assembling work of the display device 2 can be facilitated. In addition, by bonding the casing 21 and the elastic member 25 with the adhesive member 28, energy loss when water passes through the first contact surface 251 is reduced in the second contact surface 252 and the third contact surface 253. It can be greater than the energy loss when water passes through each. Therefore, the display device 2 can maintain the waterproof property of the first contact surface 251 in a higher state.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, the HMD 1A includes the display device 3. The display device 3 has substantially the same configuration as the display device 2 in the first embodiment. The display device 3 is different from the display device 2 in the configuration of the first protrusion 33B, the second protrusion 33C, the pressing member 34, and the like.

  As shown in FIG. 8, the first projecting portion 33B includes an upper end portion and a lower end portion of the wall surface 21E, an upper first projecting portion 33B projecting from the right portion to the rear side, a lower first projecting portion 33B, It has a first protrusion 33B on the right side. A groove portion 38 is formed at the approximate center in the front-rear direction on the lower surface of the lower first protrusion 33B. The groove portion 38 extends from the rear end portion to the front end portion of the lower first protrusion 33B. The front end 381 of the groove 38 communicates with the end 222 of the groove 22. The left end 382 of the groove 38 communicates with a hole 37 (see FIG. 9) described later. The groove portions 22 and 38 are integrated and extend linearly in the front-rear direction. The second protruding portion 33C protrudes inward from the rear end portion of the first protruding portion 33B. The upper first projecting portion 33B is provided with three upper second projecting portions 33C that are arranged in the left-right direction at intervals and project downward. The lower first projecting portion 33B is provided with three lower second projecting portions 33C that are arranged in the left-right direction at intervals and project upward.

  The pressing member 34 has a base 24A, a first protrusion 34B, and a second protrusion 34C. As shown in FIG. 9, a notch 340 </ b> B is formed at the lower end and substantially in the center in the left-right direction on the front side surface of the base 24 </ b> A. The front side surface of the base 24A is recessed rearward by the notch 340B. As shown in FIG. 8, the first protrusion 34B includes an upper first protrusion 34B protruding from the upper side, the lower side, the left side, and the right side of the second opening 24D in the base 24A, and a lower side. It has the 1st protrusion part 34B, the 1st protrusion part 34B on the left side, and the 1st protrusion part 34B on the right side. The second protrusion 34C protrudes outward from the rear end of the first protrusion 34B. The upper first projecting portion 34B is provided with three upper second projecting portions 34C that are arranged in the left-right direction with a space therebetween and project upward. The lower first protrusion 34B is provided with three lower second protrusions 34C (not shown) that are arranged in the left-right direction with a space between each other and protrude downward.

  As shown in FIG. 8, the pressing member 34 is engaged with the housing 31 through the processes indicated by arrows Y31 and Y32, as in the case of the first embodiment. In the process of engagement, as shown in FIG. 9, the second protrusion 34C of the pressing member 34 enters the gap between the wall surface 21E of the housing 31 and the second protrusion 33C. The second protrusion 33C of the casing 31 enters the gap between the base 24A of the pressing member 34 and the second protrusion 34C. The base 24A of the pressing member 34 covers the wall surface 21E of the housing 31 from the rear side.

  As shown in FIG. 9A, the interposition part 25B of the elastic member 25 is sandwiched from both the front and rear sides in a state of being disposed between the first protrusion 34B of the pressing member 34 and the wall surface 21E of the housing 31, Compressed. Since the elastic member 25 tends to expand from the compressed state to the original state, the pressing member 34 and the casing 31 and the elastic member 25 are in close contact with each other. Hereinafter, the contact surface between the wall surface 21 </ b> E of the housing 31 and the elastic member 25 is referred to as a “first contact surface 351”. A contact surface between the first protrusion 34B of the pressing member 34 and the elastic member 25 is referred to as a “second contact surface 352”. A contact surface between the second protrusion 33C of the housing 31 and the second protrusion 34C of the pressing member 34 is referred to as a “third contact surface 353”. The frictional forces on the first contact surface 351 and the second contact surface 352 are referred to as “first friction force (F31)” and “second friction force (F32)”, respectively. The first contact surface 351, the second contact surface 352, the third contact surface 353, and the pressure loss in the flooding path from the outside to the first contact surface 351 are respectively referred to as “first pressure loss (P31)” and “second pressure loss”. (P32) "" Third pressure loss (P33) ". In this case, the first friction force is greater than the second friction force (F31> F32). The first pressure loss is larger than the second pressure loss and the third pressure loss (P31> P32, P31> P33).

  As shown in FIG. 9B, a clamping part 36 is formed in a part sandwiched between the pressing member 34 and the casing 31. The clamping part 36 is elastic with the base part 24A, the first projecting part 34B, and the second projecting part 34C of the pressing member 34, the wall surface 21E of the housing 31, the first projecting part 33B, and the second projecting part 33C. This is a closed space surrounded by the member 25. The sandwiching portion 36 is formed in a frame shape that covers the outside of the first opening 23A and the second opening 24D.

  A hole 37 is formed by the notch 340 </ b> B of the pressing member 34 and the first protrusion 33 </ b> B of the housing 31. The upper end portion of the hole portion 37 communicates with the holding portion 36 (see FIG. 9B). The hole portion 37 extends from the holding portion 36 toward the outside of the housing 31. As shown in FIG. 8, the lower end portion of the hole portion 37 communicates with the end portion 382 of the groove portion 38. When a virtual plane extending along the first contact surface 351 is defined, the virtual plane and the hole portion 37 do not intersect. The same applies to the relationship between the second contact surface 352 and the hole 37.

<Operation and Effect of Third Embodiment>
In the display device 3, compared to the display device 2 in the first embodiment, the water immersion path from the outside to the first contact surface 351 can be made longer, and the side surface of the elastic member 25 can be covered with the pressing member 34. The third pressure loss can be increased. Therefore, the display device 3 can further improve the waterproof performance.

<Fourth embodiment>
A fourth embodiment of the present invention will be described with reference to FIGS. In the fourth embodiment, the HMD 1 </ b> A includes a display device 4. The display device 4 has substantially the same configuration as the display device 2 in the first embodiment. The display device 5 is different from the display device 2 in the configuration of the first protrusion 43B, the second protrusion 43C, the pressing member 44, the engagement part 45A, and the like.

  As shown in FIG. 10, the first protrusion 43B includes an upper first protrusion 43B that protrudes rearward from the upper, lower, left, and right sides of the first opening 23A, and a lower first protrusion. It has a portion 43B, a left first protrusion 43B, and a right first protrusion 43B. The second protrusion 43C protrudes outward from the outer surface of the first protrusion 43B. The second protrusion 43C includes plate-like portions 431C and 432C that are separated in the front-rear direction. The plate-like portion 431C is disposed on the front side with respect to the plate-like portion 432C. The upper first projecting portion 43B is provided with three upper second projecting portions 43C that are arranged in the left-right direction at intervals and project upward. The lower first protrusion 43B is provided with three lower second protrusions 43C that are arranged in the left-right direction with a space between each other and protrude downward. The first protrusion 43B on the left side is provided with a second protrusion 43C that protrudes to the left substantially at the center in the vertical direction. The first protrusion 43B on the right side is provided with a second protrusion 43C that protrudes to the right at substantially the center in the vertical direction.

  The pressing member 44 includes a base 24A, a first protrusion 44B, and a second protrusion 44C. The first protrusion 44B includes a first protrusion 44B on the upper side of the second opening 24D, a first protrusion 44B on the lower side, a first protrusion 44B on the left side, and a first protrusion 44B on the right side of the base 24A. . The upper first protrusion 44B includes two first protrusions 44B arranged in the left-right direction with a space between each other. The upper first projecting portion 44B is provided on the left side and the right side of the upper side of the base portion 24A, substantially in the left-right direction. Similarly, the lower first projecting portion 44B is provided on the left side and the right side of the lower center of the base portion 24A, substantially in the left-right direction. The left first projecting portion 44B is provided on the left upper end and lower end of the base 24A. The first protrusion 44B on the right side is provided at the upper end and the lower end on the right side of the base 24A. The second projecting portion 44C projects outward from the front end portion of the first projecting portion 44B. Each of the second projecting portions 44C has plate-like portions 441C and 442C that are separated in the front-rear direction. The plate-like portion 441C is disposed on the front side with respect to the plate-like portion 442C. The rear side surface of the plate-like portion 442C is in contact with the front side surface of the base portion 24A. Each of the plate-like portions 441C and 442C is connected to the first protrusion 44B at the inner end.

  The engaging member 45 is a member for engaging the pressing member 44 with the housing 41. The engaging member 45 has engaging portions 45A and 45B. The shape when the engagement portion 45A is viewed from the rear side is a substantially inverted C shape. The shape when the engagement portion 45B is viewed from the rear side is substantially C-shaped. The engaging portions 45A and 45B form a frame shape when both end portions are brought into contact with each other.

  As in the case of the first embodiment, the pressing member 44 is engaged with the housing 41 through the following steps (arrows Y41 to Y43). First, the elastic member 25 is arranged on the rear side of the first protrusion 43B of the housing 41 so that the first cover portion 25A of the elastic member 25 covers the first opening 23A of the housing 41 from the rear side. The interposition part 25B of the elastic member 25 contacts the rear end part of the first protrusion 43B of the housing 41 from the rear side. The second protrusions 44C of the pressing member 44 and the second protrusions 43C of the housing 41 are alternately arranged. The casing 41 is moved to the rear side (arrow Y41). The positions in the front-rear direction of the gap between the plate-like portions 431C and 432C of the housing 41 and the gap between the plate-like portions 441C and 442C of the pressing member 44 are the same.

  Next, the engaging portion 45A is inserted from the left side (arrow Y42) into the gap between the plate-like portions 441C and 442C of the pressing member 44 and the plate-like portions 431C and 432C of the housing 41 (arrow Y42). The part 45B is inserted from the right side (arrow Y43). The pressing member 44 cannot be detached from the housing 41. The base 24A of the pressing member 44 covers the wall surface 21E of the housing 41 from the rear side. Thus, the pressing member 44 is engaged with the housing 41.

  As shown in FIG. 11, with the pressing member 44 engaged with the housing 41, the interposition portion 25 </ b> B (see FIG. 10) of the elastic member 25 is configured such that the base 24 </ b> A of the pressing member 44 and the first protrusion of the housing 41. 43B is sandwiched from both the front and rear sides and compressed. Since the elastic member 25 tends to expand from the compressed state to the original state, the pressing member 34 and the casing 31 and the elastic member 25 are in close contact with each other.

  Hereinafter, the contact surface between the first protrusion 43B of the housing 41 and the elastic member 25 is referred to as a “first contact surface 451”. A contact surface between the base 24A of the pressing member 44 and the elastic member 25 is referred to as a “second contact surface 452”. The contact surface between the second protrusion 43C of the housing 41 and the base 24A of the pressing member 34 and the contact surface between the wall surface 21E of the housing 41 and the second protrusion 44C of the pressing member 44 are respectively referred to as “third contact”. It is referred to as “surface 453”. The frictional forces on the first contact surface 451 and the second contact surface 452 are referred to as “first friction force (F41)” and “second friction force (F42)”, respectively. The first contact surface 451, the second contact surface 452, and the third contact surface 453 and the pressure loss in the water immersion path from the outside to the first contact surface 451 are expressed as “first pressure loss (P41)” “second pressure loss”. (P42) "" Third pressure loss (P43) ". In this case, the first friction force is larger than the second friction force (F41> F42). The first pressure loss is larger than the second pressure loss and the third pressure loss (P41> P42, P41> P43).

  A clamping portion 46 is formed in a portion sandwiched between the pressing member 44 and the casing 41. The clamping part 46 is elastic to the base part 24A, the first projecting part 44B, and the second projecting part 44C of the pressing member 44, the wall surface 21E of the housing 41, the first projecting part 43B, and the second projecting part 43C. This is a closed space surrounded by the member 25. The clamping part 46 is formed in a frame shape that covers the outside of the first opening 23A and the second opening 24D.

  Of the second protrusions 43C on the lower side of the housing 41, the second protrusion 43C approximately in the center in the left-right direction has only the plate-like part 432C and does not have a member corresponding to the plate-like part 431C. For this reason, as shown in FIG. 10, a portion corresponding to the plate-like portion 431 </ b> C becomes a cavity, and a hole 47 is formed. As shown in FIG. 11, the upper end portion of the hole portion 47 communicates with the clamping portion 46. The hole portion 47 extends from the holding portion 46 toward the outside of the housing 41. As shown in FIG. 10, the lower end of the hole 47 communicates with the end 222 of the groove 22. When a virtual plane extending along the first contact surface 451 is defined, the virtual plane and the hole 47 do not intersect. The same applies to the relationship between the second contact surface 452 and the hole 47.

<Operation and Effect of Fourth Embodiment>
In the display device 4, the force when the elastic member 25 is sandwiched from the front and rear sides by the casing 41 and the pressing member 44 can be easily adjusted by changing the shape (thickness) of the engaging member 45. Therefore, for example, even when the elastic member 25 having a different shape or material is used, the display device 4 can appropriately suppress the intrusion of water into the housing 41 by the elastic member 25. Moreover, since the elastic member 25, the housing | casing 41, and the press member 44 can be prevented from sliding at the time of the assembly | attachment of the housing | casing 41, it can be assembled easily and waterproofness can be kept high.

<Fifth Embodiment>
A fifth embodiment of the present invention will be described with reference to FIGS. In the fifth embodiment, the HMD 1 </ b> A includes a display device 5. The display device 5 has substantially the same configuration as the display device 2 in the first embodiment. The display device 5 is different from the display device 2 in the configuration of the first protrusion 53B, the second protrusion 53C, the pressing member 54, the elastic member 59, and the like.

  As shown in FIG. 12, the first protrusion 53B protrudes rearward from the upper end, the lower end, the left end, and the right end of the wall surface 21E. Screw holes 53H are provided at the four corners of the first protrusion 53B. A notch 530B is formed at the rear end portion of the lower first protrusion 53B and substantially at the center in the left-right direction. The rear end portion of the lower first protrusion 53B is recessed forward by the notch 530B. A groove portion 58 is formed at the approximate center in the left-right direction on the lower surface of the lower first protrusion 53B. The front end 581 of the groove 58 communicates with the end 222 of the groove 22, and the rear end 582 communicates with the notch 530B. The second protrusion 53C protrudes rearward from the upper, lower, left, and right sides of the first opening 23A. The second projecting portion 53C is disposed with an interval inward with respect to the first projecting portion 53B.

  The elastic member 59 is made of a soft resin material that is softer than the pressing member 54 described later. The elastic member 59 has flexibility. The elastic member 59 has a frame shape and has a third opening 59A in the center. The outer diameter of the elastic member 59 is slightly larger than the first opening 23A. An example of the elastic member 59 is a rubber O-ring.

  The pressing member 54 is a transparent member made of a hard material harder than the elastic member 59. The pressing member 54 has a base 54A and a first protrusion 54B. The base 54A has a flat plate shape. Through holes 54H are provided at the four corners of the base 54A. The first protrusion 54B protrudes forward from the base 54A. The first protrusion 54B has a cylindrical shape (see FIG. 13). The cross-sectional shape of the outer peripheral surface when the first protrusion 54B is cut along a virtual plane orthogonal to the front-rear direction is substantially the same as the first opening 23A of the housing 51. As shown in FIG. 13, a groove 541B is formed in a circular shape along the outer peripheral surface of the first protrusion 54B.

  As shown in FIG. 12, the pressing member 54 is engaged with the housing 51 through the following process (arrow Y51). First, the elastic member 59 is fitted into the groove 541B (see FIG. 13) of the first protrusion 54B of the pressing member 54. At this time, the elastic member 59 slightly protrudes outward from the outer peripheral surface of the first protrusion 54B. Next, the first protrusion 54B of the pressing member 54 is inserted into the first opening 23A of the housing 51 from the rear side (arrow Y51). The rear ends of the first protrusion 53B and the second protrusion 53C of the casing 51 are in contact with the base 54A of the pressing member 54 from the front side. Of the base 54A of the pressing member 54, the inner portion of the cylindrical first protrusion 54B covers the first opening 23A from the rear side. Hereinafter, the portion of the base 54A of the pressing member 54 that covers the first opening 23A is referred to as a “second cover 541”. Next, each of the four screws 50 is inserted into the through hole 54 </ b> H of the pressing member 54 from the rear side and is screwed into the screw hole 53 </ b> H of the housing 51. When the screw 50 is screwed into the screw hole 53 </ b> H, the pressing member 54 is pressed to the front side with respect to the housing 51. Thus, the pressing member 54 is engaged with the housing 51.

  As shown in FIG. 13, the first protrusion 54 </ b> B of the pressing member 54 presses the second protrusion 53 </ b> C of the housing 51 outward through the elastic member 59. The elastic member 59 is sandwiched and compressed by the first protrusion 54B of the pressing member 54 and the second protrusion 53C of the housing 51. In this case, the compression direction of the elastic member 59 is the direction extending between the outer side and the inner side of the elastic member 59, that is, the direction orthogonal to the front-rear direction. Since the elastic member 59 has elasticity, it tries to expand from the compressed state to the original state. The elastic member 59 is in close contact with the casing 51 and the pressing member 54.

  Hereinafter, the contact surface between the second protrusion 53C of the housing 51 and the elastic member 59 is referred to as a “first contact surface 551”. A contact surface between the first protrusion 54B of the pressing member 54 and the elastic member 59 is referred to as a “second contact surface 552”. A contact surface between the inner peripheral surface of the second protrusion 53C of the casing 51 and the outer peripheral surface of the first protrusion 54B of the pressing member 54 is referred to as a “third contact surface 553”. The friction force on the first contact surface 551 and the second contact surface 552 is referred to as “first friction force (F51)” and “second friction force (F52)” as the first contact surface 551, the second contact surface 552, and The pressure loss in the flooding path from the third contact surface 553 or the outside to the first contact surface 551 is expressed as “first pressure loss (P51)”, “second pressure loss (P52)”, “third pressure loss (P53)”. That's it. In this case, the second friction force is greater than the first friction force (F52> F51). The first pressure loss and the second pressure loss are larger than the third pressure loss (P51, P52> P53).

  A clamping portion 56 is formed in a portion sandwiched between the pressing member 54 and the casing 51. The sandwiching portion 56 is a closed space surrounded by the base portion 54A of the pressing member 54, the wall surface 51E of the housing 51, the first protruding portion 53B, and the second protruding portion 53C. The sandwiching portion 56 is formed in a frame shape that covers the outside of the first opening 23A. As shown in FIG. 12, a hole 57 is formed by the notch 530 </ b> B of the first protrusion 53 </ b> B of the housing 51 and the base 54 </ b> A of the pressing member 54. As shown in FIG. 13, the upper end portion of the hole portion 57 communicates with the clamping portion 56. The hole portion 57 extends from the holding portion 56 toward the outside of the housing 51. The lower end portion of the hole portion 57 communicates with the end portion 582 of the groove portion 58. The image light of the image displayed on the liquid crystal panel 10B is emitted to the rear side, passes through the third opening 59A of the elastic member 59 to the rear side, and enters the left eye of the user.

<Operation and Effect of Fifth Embodiment>
In the display device 5, the first opening 23 </ b> A of the housing 51 is covered with the second cover portion 541 of the pressing member 54. Further, the gap between the casing 51 and the pressing member 54 is closed by a flexible elastic member 59. Thereby, the infiltration of water into the housing 51 is suppressed. The elastic member 59 is compressed and deformed by being pressed against the casing 51 by the pressing member 54, and is in close contact with the casing 21 and the pressing member 24. For this reason, the display device 5 can achieve high waterproofness by the elastic member 59. The elastic member 59 has a third opening 59A through which image light passes. Therefore, the display device 5 can use a general seal member (for example, an O-ring) having an opening at the center as the elastic member 59.

  In the display device 5, no opening is provided in the pressing member 54. Instead, the pressing member 54 is formed with a portion (second cover portion 541) through which the image light emitted from the housing 51 is transmitted. Since the pressing member 54 is transparent, the image light can be transmitted through the second cover portion 541. In this case, since water can be prevented from entering the housing 51 through the opening of the pressing member 54, the waterproofness of the housing 51 can be improved.

  In the case of the display device 5, the sandwiching portion 56 for guiding the water flowing along the wall surface 51 </ b> L downward toward the wall surface 51 </ b> L is formed between the first protrusion 53 </ b> B and the second protrusion 53 </ b> C of the housing 51. Formed between. For this reason, it becomes possible to enlarge the holding | maintenance part 56 easily compared with the case of the display apparatuses 2-4. Therefore, the display device 5 can appropriately guide the water that has flowed along the wall surface 51 </ b> U toward the wall surface 51 </ b> L via the sandwiching portion 56, and can discharge the water to the outside of the housing 51 via the hole portion 57. Since the pinching portion 56 is large, water entering from the outside is not easily immersed in the first and second contact portions, so that the waterproof performance can be improved.

  The pressing member 54 is pressed to the front side with respect to the housing 51 when the screw 50 is screwed into the screw hole 53H. On the other hand, the compression direction of the elastic member 59 faces the direction orthogonal to the front-rear direction. That is, the compression direction of the elastic member 59 and the direction in which the pressing member 54 is pressed against the housing 51 intersect. For this reason, for example, even when the screw 50 is loosened with respect to the screw hole 53H, the state in which the elastic member 59 is in close contact with the housing 51 and the pressing member 54 does not change. Therefore, the display device 5 can maintain the waterproof property of the display device 5 well even when the screw 50 is loosened.

  In addition, in 1st Embodiment-4th Embodiment, although it did not touch about fixation by the screw of a press member especially, you may use the fixing method of 5th Embodiment, 6th Embodiment mentioned later, and 7th Embodiment. . The same applies to embodiments that do not mention other fixing methods.

<Sixth Embodiment>
A sixth embodiment of the present invention will be described with reference to FIGS. In the sixth embodiment, the HMD 1 </ b> A includes a display device 6. The display device 6 has substantially the same configuration as the display device 5 in the fifth embodiment. The display device 6 is different from the display device 5 in the configuration of the first protrusion 63B, the second protrusion 63C, the third protrusion 63D, the pressing member 64, and the like.

  As shown in FIGS. 14 and 15, the first protrusion 63 </ b> B has an upper first protrusion 63 </ b> B that protrudes rearward from the upper, lower, left, and right sides of the first opening 23 </ b> A. It has the 1st protrusion part 63B, the 1st protrusion part 63B on the left side, and the 1st protrusion part 63B on the right side. As shown in FIG. 14, the second protrusion 63C protrudes outward from the rear end of the first protrusion 63B. The second protrusion 63C includes an upper second protrusion 63C protruding from the upper, lower, left, and right first protrusions 63B, a lower second protrusion 63C, and a left second protrusion. 63C and the right side 2nd protrusion part 63C are provided. A groove 63E is formed on the rear side surface of the second protrusion 63C. The groove 63E is formed in a circular shape along the outside of the first opening 23A. A screw hole 63H is provided in the left side surface of the left second protrusion 63C and substantially in the center in the vertical direction. The third protrusion 63D extends from the right end of the wall surface 21E toward the rear side. The third protrusion 63D extends from the upper end to the lower end of the wall surface 21E. The left end of the third protrusion 63D is connected to the right end of the right second protrusion 63C.

  The base 64A of the pressing member 64 includes an upper first protrusion 64B, a lower first protrusion 64B, and a left first protrusion 64B. A screw hole 64H is provided at a substantially vertical center of the left first protrusion 64B. A notch 640 </ b> B is formed substantially at the center in the left-right direction in the front end portion of the lower first protrusion 64 </ b> B. The notch 640B has a rectangular shape. The front end portion of the lower first protrusion 64B is recessed rearward by the notch 640B. As shown in FIG. 15, the second protrusion 64C protrudes inward from the front end of the first protrusion 64B.

  As shown in FIG. 14, the pressing member 64 is engaged with the housing 61 through the following steps (arrows Y61 and Y62), as in the case of the first embodiment. First, the elastic member 59 is fitted in the groove 63E of the second protrusion 63C of the housing 61. At this time, the elastic member 59 slightly protrudes rearward from the rear side surface of the second protrusion 63C. The pressing member 64 is moved forward (arrow Y61) until the positions in the front-rear direction of the second protrusion 64C and the first protrusion 63B (see FIG. 15) of the housing 61 coincide. Next, the pressing member 34 is moved to the right side (arrow Y62). As shown in FIG. 15, the second protrusion 64C of the pressing member 64 enters the gap between the wall surface 21E of the housing 61 and the second protrusion 63C. The second projecting portion 63C of the housing 61 enters the gap between the base portion 64A of the pressing member 64 and the second projecting portion 64C. The right end portions of the upper first projecting portion 64B and the lower first projecting portion 64B of the pressing member 64 are in contact with the third projecting portion 63D of the housing 61 from the left side, and the right side movement of the pressing member 64 is performed. Be regulated. The base 64A of the pressing member 64 covers the wall surface 21E of the housing 61 from the rear side. The first opening 23 </ b> A of the housing 61 is covered from the rear side by the second cover portion 641 (see FIG. 14) of the pressing member 64. Next, the screw 60 is inserted into the screw hole 64H of the pressing member 64 from the left side, and is screwed into the screw hole 63H of the housing 61. When the screw 60 is screwed into the screw hole 64 </ b> H, the pressing member 64 is pressed to the right side with respect to the housing 61. Thus, the pressing member 64 is engaged with the housing 61.

  As shown in FIG. 15, the elastic member 59 is sandwiched from both the front and rear sides by the base portion 64 </ b> A of the pressing member 64 and the second protruding portion 63 </ b> C of the housing 61 and compressed. In this case, the compression direction of the elastic member 59 faces the front-rear direction. Since the elastic member 59 has elasticity, it tries to expand from the compressed state to the original state. The elastic member 59 is in close contact with the casing 61 and the pressing member 64. Further, in response to the compression of the compressed elastic member 59, a force toward the rear side acts on the pressing member 64. On the other hand, the rearward movement of the pressing member 64 is restricted by the second protruding portion 64C of the pressing member 64 coming into contact with the second protruding portion 63C of the housing 61 from the front side. That is, a force that is pressed toward the housing 61 is relatively applied to the pressing member 64.

  Hereinafter, the contact surface between the second protrusion 63C of the housing 61 and the elastic member 59 is referred to as a “first contact surface 651”. A contact surface between the base portion 64 </ b> A of the pressing member 64 and the elastic member 59 is referred to as a “second contact surface 652”. A contact surface between the second protruding portion 63C of the housing 61 and the base portion 64A of the pressing member 64 is referred to as a “third contact surface 653”. The frictional force on the first contact surface 651 and the second contact surface 652 is referred to as “first friction force (F61)” and “second friction force (F62)”. The first contact surface 651, the second contact surface 652, the third contact surface 653 and the pressure loss in the submerged path from the outside to the first contact surface 651 are expressed as “first pressure loss (P61)” “second pressure loss”. (P62) "and" third pressure loss (P63) ". In this case, the first friction force is larger than the second friction force (F61> F62). The first pressure loss and the second pressure loss are larger than the third pressure loss (P61, P62> P63).

  A sandwiching portion 66 is formed at a portion sandwiched between the pressing member 64 and the casing 61. The sandwiching portion 66 is a closed space surrounded by the second protruding portion 64C of the pressing member 64, the wall surface 21E of the housing 61, the first protruding portion 63B, and the second protruding portion 63C. The clamping part 66 is formed in a frame shape that covers the outside of the first opening 23A. A hole 67 is formed by the notch 640 </ b> B of the first protrusion 64 </ b> B of the pressing member 64 and the wall surface 21 </ b> E of the housing 61. The upper end portion of the hole portion 67 communicates with the clamping portion 66. The hole 67 extends from the holding portion 66 toward the outside of the housing 51. The lower end portion of the hole portion 67 communicates with the end portion 222 (see FIG. 14) of the groove portion 22. When a virtual plane extending along the first contact surface 651 is defined, the virtual plane and the hole 67 do not intersect. The same applies to the relationship between the second contact surface 652 and the hole 67.

<Operation and Effect of Sixth Embodiment>
In the display device 6, as in the case of the display device 5, the contact area between the elastic member 59 and the pressing member 64 can be reduced. For this reason, the assembly | attachment of the display apparatus 6 can be made easy.

  The pressing member 64 is pressed to the right side with respect to the housing 61 when the screw 60 is screwed into the screw hole 64H. On the other hand, the compression direction of the elastic member 59 faces front and rear. That is, the compression direction of the elastic member 59 and the direction in which the pressing member 64 is pressed against the housing 61 intersect. For this reason, for example, even when the screw 60 is loosened with respect to the screw hole 64H, the state in which the elastic member 59 is in close contact with the housing 61 and the pressing member 64 does not change. Therefore, the display device 6 can maintain the waterproof property of the display device 6 well even when the screw 60 is loosened.

<Seventh embodiment>
A seventh embodiment of the present invention will be described with reference to FIGS. In the seventh embodiment, the HMD 1 </ b> A includes a display device 7. The display device 7 is substantially the same as the display device 6 in the sixth embodiment. The display device 7 is different from the display device 6 in the first protrusion 73 </ b> B, the second protrusion 73 </ b> C, and the pressing member 74.

  Through holes 73H are provided at the four corners of the first opening 23A. As shown in FIG. 17, the first protrusion 73B includes an upper first protrusion 73B that protrudes rearward from the upper, lower, left, and right sides of the first opening 23A, and a lower first protrusion. 73B, the left first protrusion 73B, and the right first protrusion 73B. The second protrusion 73C protrudes outward from the outer peripheral surface near the rear end of the first protrusion 73B. A circumferential groove 73E is formed on the outer peripheral surface of the second protrusion 73C.

  The base 74A of the pressing member 74 includes an upper first protrusion 74B, a lower first protrusion 74B, a left first protrusion 74B, and a right first protrusion 74B, each protruding forward. A notch 740B is formed at the approximate center in the left-right direction of the front end of the lower first protrusion 74B. The notch 740B has a rectangular shape. The front end portion of the lower first protrusion 74B is recessed rearward by the notch 740B. As shown in FIG. 17, protrusions 74 </ b> H that protrude toward the front side are provided on the inner side of the first protrusion 74 </ b> B and in the vicinity of the four corners of the base 74 </ b> A. Each protrusion 74H has a screw hole at the front end.

  The pressing member 74 is engaged with the housing 71 via the arrow Y71 as in the fifth embodiment. The rear end portion of the first projecting portion 73B of the housing 71 contacts the base portion 74A of the pressing member 74 from the front side. The base 74A of the pressing member 74 covers the wall surface 21E of the casing 71 from the rear side. The first opening 23 </ b> A of the housing 71 is covered from the rear side by the second cover portion 741 of the pressing member 74. Next, the screw 70 is inserted into the through hole 73 </ b> H of the housing 71 from the front side and is screwed into the screw hole of the protruding portion 74 </ b> H of the pressing member 74. Thus, the pressing member 74 is engaged with the casing 71. The first protrusion 74 </ b> B of the pressing member 74 presses the first protrusion 73 </ b> B of the housing 71 inward through the elastic member 59. The elastic member 59 is sandwiched and compressed by the first protrusion 74B of the pressing member 74 and the first protrusion 73B of the housing 71. Since the elastic member 59 has elasticity, it tries to expand from the compressed state to the original state. The elastic member 59 is in close contact with the casing 71 and the pressing member 74.

  Hereinafter, the contact surface between the first protrusion 73B of the housing 71 and the elastic member 59 is referred to as a “first contact surface 751”. The contact surface between the first protrusion 74B of the pressing member 74 and the elastic member 59 is referred to as a “second contact surface 752”. A contact surface between the outer peripheral surface of the second protrusion 73C of the housing 71 and the inner peripheral surface of the first protrusion 74B of the pressing member 74 is referred to as a “third contact surface 753”. The frictional force on the first contact surface 751 and the second contact surface 752 is referred to as “first friction force (F71)” and “second friction force (F72)”. The first contact surface 751, the second contact surface 752, the third contact surface 753, and the pressure loss in the water immersion path from the outside to the first contact surface 751 are expressed as “first pressure loss (P71)”, “second pressure loss”. (P72) ”and“ third pressure loss (P73) ”. In this case, the first friction force is larger than the second friction force (F71> F72). The first pressure loss and the second pressure loss are larger than the third pressure loss (P71, P72> P73).

  A clamping portion 76 is formed at a portion sandwiched between the pressing member 74 and the casing 71. The sandwiching portion 76 is a closed space surrounded by the first protrusion 74B of the pressing member 74, the wall surface 21E of the housing 71, the first protrusion 73B, and the second protrusion 73C. A hole 77 is formed by the notch 740 </ b> B of the first protrusion 73 </ b> B on the lower side of the pressing member 74 and the wall surface 21 </ b> E of the housing 71. As shown in FIG. 16, the upper end portion of the hole 77 communicates with the clamping portion 76. The hole 77 extends from the holding portion 76 toward the outside of the housing 71. The lower end of the hole 77 communicates with the end 222 of the groove 22.

<Operation and Effect of Seventh Embodiment>
Compared with the display devices 5 and 6, the display device 7 can simplify the shapes of the first protrusion 73 </ b> B and the second protrusion 73 </ b> C of the housing 71 and the first protrusion 74 </ b> B of the pressing member 74.

<Eighth Embodiment>
An eighth embodiment of the present invention will be described with reference to FIGS. In the eighth embodiment, the HMD 1A includes a display device 8. The display device 8 is substantially the same as the display device 7 in the seventh embodiment. The display device 8 is different from the display device 7 in that an interposition member 89 is provided instead of the elastic member 59.

  The first protrusion 83B protrudes to the left from the upper side, the lower side, the front side, and the rear side of the first opening 23A. The second protrusion 83C protrudes outward from the left end of the first protrusion 83B (see FIG. 19). The interposition member 89 has a rectangular plate shape. The interposition member 89 has a rectangular third opening 89A as a center. The shape of the third opening 89A is the same as the first opening 23A of the housing 81. Each surface of the interposition member 89 faces in the front-rear direction. The interposition member 89 is an adhesive member having adhesiveness on both sides.

  As shown in FIG. 18, the pressing member 74 is attached to the housing 81 by the interposition member 89 through the following steps (arrows Y81 and Y82). First, the interposition member 89 is brought closer to the housing 81 from the rear side. The front side surface of the interposition member 89 is affixed to the rear side surface of the second protrusion 83C of the housing 81 (arrow Y81). At this time, the positions of the first opening 23 </ b> A of the housing 81 and the third opening 89 </ b> A of the interposition member 89 coincide with each other. Next, the rear side surface of the interposition member 89 is attached to the front side surface of the base portion 74A of the pressing member 74 (arrow Y82). As described above, the pressing member 74 is attached to the casing 81 by the interposition member 89. The base 74A of the pressing member 74 covers the wall surface 21E of the housing 81 from the rear side. The first opening 23 </ b> A of the housing 81 is covered from the rear side by the second cover portion 741 </ b> A of the pressing member 74.

  As shown in FIG. 19, a sandwiching portion 86 is formed in a portion sandwiched between the pressing member 74 and the housing 81. The sandwiching portion 86 is a closed space surrounded by the base portion 74A and the first projecting portion 74B of the pressing member 74, the wall surface 21E of the housing 81, the first projecting portion 83B, and the second projecting portion 83C. A hole 87 is formed by the notch 840B of the first protrusion 83B on the lower side of the pressing member 74 and the wall surface 21E of the housing 81. An upper end portion of the hole portion 87 communicates with the sandwiching portion 86. The hole portion 87 extends from the holding portion 86 toward the outside of the housing 81. The lower end portion of the hole portion 87 communicates with the end portion 822 of the groove portion 82.

<Operation and Effect of Eighth Embodiment>
By bonding the housing 81 and the pressing member 74 together with the interposition member 89, it is possible to further suppress the occurrence of deviation between the housing 81 and the pressing member 74 when the display device 8 is assembled. For this reason, since it can suppress that the contact part of the housing | casing 81 and the press member 74 is damaged at the time of an assembly, high waterproofness is realizable. Further, since the pressing member 74 can be fixed to the casing 81 by the interposition member 89, the assembling work of the display device 8 can be facilitated.

<Ninth Embodiment>
A ninth embodiment of the present invention will be described with reference to FIG. Unlike the first to eighth embodiments, the HMD 1B is an optically transmissive see-through HMD. The light of the scenery in front of the user's eyes is directly guided to the user's eyes by passing through the half mirror 10A. The projection format of the HMD 1B is a virtual image projection type. The half mirror 10 </ b> A reflects light of an image displayed on the liquid crystal panel 10 </ b> B accommodated in the housing 21 toward the eye on one side of the user. The HMD 1B can make the user recognize the image superimposed on the scene in front of him. The HMD 1B further includes a support member 29 and a half mirror 10A (see FIG. 1) in addition to the configuration of the HMD 1A (see FIG. 1). Below, the case where the display apparatus 2 in 1st Embodiment is used as a display apparatus of HMD1B is mentioned as an example, and is demonstrated. Note that the display devices 3 to 8 may be used instead as the display device of the HMD 1B.

  The HMD 1A includes a mounting tool 11, a connecting tool 12, a display device 2, a support member 29, and a half mirror 10A. The HMD 1B may include a full mirror instead of the half mirror 10A. In the HMD 1B, the ball joint 15 is connected to the wall surface 21D of the housing 21 of the display device 2. With the display device 2 connected to the connector 12 via the ball joint 15, the wall surfaces 21F, 21R, 21U, 21L, 21D, and 21E of the housing 21 are front side, rear side, upper side, lower side, Corresponds to the right and left wall surfaces. The pressing member 24 is disposed on the left side of the housing 21.

<Support member 29, half mirror 10A>
The support member 29 is arranged on the left side of the pressing member 24 engaged with the housing 21. The support member 29 includes plate members 29A and 29B. Each surface of the plate members 29A and 29B faces in the vertical direction. The plate member 29A extends from the upper end portion of the base portion 24A of the pressing member 24 toward the left side. The plate member 29B extends from the lower end portion of the base portion 24A of the pressing member 24 toward the left side. The plate members 29A and 29B face each other in the vertical direction. The lower end of the plate member 29A is inclined downward from the left end toward the right. Thereby, since water flows along the plate member 29A, dripping onto the half mirror 10A can be suppressed.

  The half mirror 10A is disposed between the plate members 29A and 29B. The half mirror 10A is a rectangle that is long in the left-right direction. The half mirror 10A is formed by evaporating a metal such as aluminum or silver on a transparent substrate made of resin glass so as to have a predetermined reflectance (for example, 50%). The half mirror 10A can reflect a part (eg, 50%) of incident light and transmit the other part (eg, 50%). The half mirror 10A is held from above and below by the support member 29. The direction orthogonal to each surface of the half mirror 10A is inclined with respect to the front-rear direction. Specifically, the direction (arrow Y1) that extends to the front side perpendicular to the front surface of the half mirror 10A faces the left front side. The direction extending to the rear side perpendicular to the rear surface of the half mirror 10A is directed to the right rear side.

  When an image is displayed on the display surface 101B of the liquid crystal panel 10B, the image light of the displayed image is emitted to the left side toward the first opening 23A of the housing 21. The left side of the first opening 23 </ b> A is covered with the first cover portion 25 </ b> A of the transparent elastic member 25. For this reason, the image light that has passed through the first opening 23A to the left passes through the first cover 25A to the left. The image light transmitted through the first cover 25A further passes through the second opening 24D of the pressing member 24 to the left and reaches the half mirror 10A. The half mirror 10A reflects image light to the rear side on the rear surface. The image light is incident on the left eye of the user. Further, the half mirror 10A transmits external light incident from the front surface to the rear side. In this way, the user recognizes the HMD 1 </ b> A display device 2 by superimposing a virtual image on the front scene.

<Operation and Effect of Ninth Embodiment>
The housing | casing 21 of the display apparatus 2 is connected with the connection tool 12 via the ball joint 15 connected to the wall surface 21D. At this time, the user arranges the wall 21 </ b> E on the opposite side to the wall 21 </ b> D of the housing 21, that is, the wall 21 </ b> E corresponding to the image light emission direction. That is, by providing the ball joint 15 on the wall surface 21D, the display device 2 can be mounted in a state where the wall surface 21D is separated from the front of the eye. In addition, the water discharged | emitted via the hole part 27 flows along the groove part 22, and flows from the wall surface 21E side to the wall surface 21D side. That is, the water discharged through the hole 27 moves in a direction away from the eyes. Accordingly, by providing the ball joint 15 on the wall surface 21D, the display device 2 can guide the water discharged by the hole portion 27 to the wall surface 21D side, which is the side separated from the user. Can be prevented from dripping.

<Other variations>
The present invention is not limited to the above embodiment, and various modifications can be made. The display device 2 is not limited to being placed in front of the user's left eye, but may be placed in front of the right eye. A device for forming an image is not limited to the liquid crystal panel 10B as in the above embodiment, and may be another known display device. Further, instead of the virtual image projection type projection method using the liquid crystal panel 10B, a retinal projection type display device that directly forms an image on the retina of the user may be used. An optical system such as a lens may be interposed between the liquid crystal panel 10B and the first opening 23A. Further, it may further have an adjustment function of adjusting the focus by moving at least one of the optical system and the liquid crystal panel 10B. The wall surface 21U of the display device 2 may be inclined upward from the end 211U toward the end 222U. Thereby, the water flowing along the wall surface 21U can be guided in a direction away from the user. The second opening 24D of the pressing member 24 may be closed by a transparent plate member.

  The lower end portion of the hole portion 27 extending downward from the sandwiching portion 26 may communicate with any position on the end portion 221 side relative to the end portion 222 of the groove portion 22. In this case, the end portion 222 of the groove portion 22 may be in the same position as the communication position where the hole portion 27 communicates in the vertical direction, or may be disposed above the communication position. Further, the end portion 221 of the groove portion 22 may be the same position as the communication position in the vertical direction, or may be disposed below the communication position. The hole 27 is not limited to being formed when the housing 21 and the pressing member 24 are engaged, and may be formed by, for example, directly providing a hole in the housing 21. The groove 22 is not limited to be formed in a straight line shape, and may be formed to extend in an oblique direction from the end 222 toward the end 221, for example.

  The elastic member 25 only needs to have flexibility in the interposition part 25B, and the first cover part 25A may not have flexibility. The first covering portion 25 </ b> A of the elastic member 25 may be as hard as the pressing member 24, or may be harder than the pressing member 24. Of the base 24A of the pressing member 24, a portion where the second opening 24D is provided may be covered with a transparent plate member. The positional relationship in the front-rear direction between the first contact surface 251 and the second contact surface 252 and the hole 27 is not limited to the above embodiment. For this reason, for example, the hole 27 may be disposed directly below the first contact surface 251 and the second contact surface 252. That is, the hole 27 may be disposed at the same position as the first contact surface 251 and the second contact surface 252 in the front-rear direction. The cable 10 </ b> C that electrically connects the liquid crystal panel 10 </ b> B and the external device may be taken out through holes such as the wall surfaces 21 </ b> U and 21 </ b> D of the housing 21. A device for controlling the display of the liquid crystal panel 10 </ b> B may be incorporated in the housing 21. In this case, the cable 10 </ b> C may not be connected to the display device 2.

  The width of the groove 22 may be substantially the same in the front-rear direction. The depth of the groove 22 may be deepest at the end 222 and shallowest at the end 221. That is, the depth of the groove portion 22 may decrease from the end portion 222 toward the end portion 221.

  The first frictional force, the second frictional force, and the first to third pressure losses are, for example, the portion of the housing 21 that contacts the elastic member 25 on the first contact surface 251, and the elastic member 35 on the second contact surface 252. It may be adjusted by the roughness of the embossing applied to the portion of the pressing member 24 that comes into contact with each other and the respective portions of the casing 21 and the elastic member 25 that come into contact with each other on the third contact surface 253. The magnitude relationship between the first frictional force and the second frictional force is not limited to the above embodiment. For example, the first friction force and the second friction force may be substantially the same. The magnitude relationship of the first to third pressure losses is not limited to the above embodiment. For example, the first to third pressure losses may be substantially the same.

  In the HMDs 1A and 1B, the ball joint 15 may be connected to the wall surface 21U of the housing 21. The connector 12 and the housing 21 may be connected by a jig other than the ball joint 15 (for example, a rubber joint). Further, the connector 12 and the housing 21 may be directly connected. That is, the housing 21 may not be movable with respect to the connector 12. Moreover, a clip etc. may be attached to the housing | casing of HMD1A and 1B, and you may mount | wear with edge parts, such as a cap of a hat and a helmet with which a user wears on a head.

<Others>
The liquid crystal panel 10B is an example of the “image forming unit” in the present invention. The pressing members 24, 34, 44, 54, 64, 74, and 84 are examples of the “covering member” and the “elastic member” in the present invention. The elastic members 25 and 59 and the interposition member 89 are examples of the “interposition member” of the present invention. The left direction is an example of the “first direction” in the present invention. The right direction is an example of the “second direction” in the present invention. The upward direction is an example of the “third direction” in the present invention. The downward direction is an example of the “fourth direction” in the present invention. The first covering portion 25A of the elastic member 25, the second covering portion 641 of the pressing member 64, and the second covering portion 741 of the pressing member 74 are examples of the “transparent portion” of the present invention. The end portions 222, 322, 422, 522, 622, 722, and 822 are examples of the “first end portion” in the present invention. The end portions 221, 321, 421, 521, 621, 721, and 821 are examples of the “second end portion” in the present invention. The screw 50 and the screw hole 53H, and the screw 60 and the screw hole 63 are examples of the “holding member” in the present invention.

1A, 1B: HMD
2, 3, 4, 5, 6, 7, 8: Display device 10B: Liquid crystal panel 10C: Cable 11: Mounting tool 12: Connecting tool 15: Ball joint 21, 31, 41, 51, 61, 71, 81: Housing Body 23A, 33A, 43A, 53A, 63A, 73A, 83A: First opening 24D, 34D, 44D: Second opening 59A, 89A: Third opening 24, 34, 44, 54, 64, 74, 84: Press Member 25, 59: Elastic member 25A: First cover 25B: Interposition part 26, 36, 46, 56, 66, 76, 86: Clamping part 27, 37, 47, 57, 67, 77, 87: Hole part 22 , 32, 38, 42, 52, 58, 62, 72, 82: groove portion 89: interposed member θ1: first angle θ2: second angle

Claims (15)

An image forming unit for forming an image;
A housing that houses the image forming unit therein and has a first opening through which image light of the image is emitted in a first direction;
A covering member that covers at least a part of the housing on the first direction side;
An interposition member having an interposition part interposed between the housing and the cover member;
A hole that communicates with the sandwiching portion sandwiched between the cover member and the housing and extends toward the outside of the housing;
A display device provided on an outer surface of the housing, extending toward a second direction opposite to the first direction, and having a groove part communicating with the hole part;
A transparent part that covers the first opening is formed on at least one of the covering member and the interposition member,
The first end of the groove portion on the first direction side is the same position as the communication portion where the hole portion communicates with the groove portion or the communication portion in a third direction orthogonal to the first direction and the second direction. Than the third direction side,
The second end portion of the groove portion on the second direction side is arranged at the same position as the communication portion or on the fourth direction side of the communication portion in a fourth direction opposite to the third direction. Characteristic display device. The covering member is a pressing member made of a hard material and pressed toward the housing,
The display device according to claim 1, wherein the interposition member is an elastic member in which at least the interposition part has flexibility. The elastic member is made of a planar soft resin having a first cover that covers the first opening,
The display device according to claim 2, wherein the transparent portion is provided in the first cover portion. The pressing member has a second cover that covers the first opening,
The transparent part is provided on the second cover part,
The display device according to claim 2, wherein the elastic member has a third opening through which the image light emitted through the first opening passes.   The display device according to claim 1, wherein the hole portion communicates with the first end portion of the groove portion.   The display device according to claim 1, wherein the hole is provided at a position different from a contact surface on which the housing and the interposition member are in contact. A cable for electrically connecting the image forming unit and an external device, wherein one end side is connected to the image forming unit and the other end side is exposed from an end of the housing in the second direction side. ,
The display device according to claim 1, wherein the second end portion of the groove portion is disposed on the fourth direction side with respect to the cable.   The display device according to claim 1, wherein the groove has a width that increases from the second end toward the first end.   The first frictional force at a portion where the casing and the elastic member are in contact is larger than a second frictional force at a portion where the pressing member and the elastic member are in contact with each other. Display device.   The first pressure loss at the portion where the housing and the elastic member are in contact is the second pressure loss at the portion where the pressing member and the elastic member are in contact, and the housing and the pressing member are in contact with each other. The display device according to claim 3, wherein the display device is larger than a third pressure loss in the portion.   The first pressure loss at the part where the casing and the elastic member are in contact and the second pressure loss at the part where the pressing member and the elastic member are in contact are the parts where the casing and the pressing member are in contact The display device according to claim 4, wherein the third pressure loss is greater than the third pressure loss.   The at least one part of the part which the said housing | casing and the said elastic member contact is bonded together by the adhesive member, The claim 1, The claim 9, The claim 10 characterized by the above-mentioned. Display device.   The display device according to any one of claims 1 to 12, further comprising a connecting portion that connects the housing to a mounting tool to be mounted on a user. The housing is rotatable with respect to the connecting portion;
A first angle with respect to the first direction of a virtual surface in contact with an end portion on the fourth direction side of the outer surface of the housing is larger than a second rotatable angle of the housing with respect to the connecting portion. The display device according to claim 13. A holding member for holding a front pressing member in the housing;
The holding member is
Holding the pressing member on the casing by pressing the pressing member against the casing in a direction crossing a compression direction of the elastic member compressed by the casing and the pressing member. The display device according to claim 2, wherein the display device is a display device.

Images