JP2011242525A - Projector - Google Patents

Abstract

A projector capable of changing a projection position without increasing a thickness dimension is provided.
A projector includes an exterior housing that constitutes an exterior, and a foot unit that contacts the placement surface when the exterior housing is placed on the placement surface. The foot unit 3 rotates with respect to the exterior casing, and the leg main body 4 that changes the protruding length from the outer surface of the exterior casing in conjunction with the rotation, and the leg main body 4 to the leg main body 4 And a protrusion 5 formed so as to extend toward the inside of the outer casing along the rotation direction.
[Selection] Figure 3

Description

  The present invention relates to a projector.

2. Description of the Related Art Conventionally, as a projector, a configuration is known that includes a leg portion (foot portion) that is provided on a bottom surface portion of an exterior housing and comes into contact with a placement surface when the projector is placed on a placement surface such as a desk. (For example, refer to Patent Document 1).
The leg part described in Patent Document 1 is provided so as to be orthogonal to the bottom surface part of the exterior casing. Moreover, this leg part is comprised so that rotation with a screw mechanism with respect to an exterior housing | casing is carried out, and the protrusion length from the bottom face part of an exterior housing | casing is changed by rotating.
Then, the user changes the posture of the projector placed on the placement surface by rotating the leg portion and changing the projection length from the bottom surface portion of the exterior housing, and the appropriate screen from the projector is changed. Project an image to a position.

JP 2006-276189 A

By the way, in the projector described in Patent Document 1, in order to configure the projection position so that the projection position can be changed in a wide range (the projector can be configured to be tiltable at a large angle), the maximum projecting length from the bottom surface of the exterior housing is set. It is necessary to enlarge (increase the leg length).
However, when configured as described above, it is necessary to secure a space when the legs move into the exterior casing, and thus the thickness dimension of the projector (thickness dimension in the direction along the vertical direction) increases. There is a problem that.

  The objective of this invention is providing the projector which can change a projection position, without enlarging a thickness dimension.

  The projector of the present invention is a projector including an exterior casing that constitutes an exterior, and a leg portion that comes into contact with the placement surface when the exterior housing is placed on the placement surface. Is a leg main body that rotates relative to the outer casing and changes the protrusion length from the outer surface of the outer casing in conjunction with the rotation, and the leg main body rotates from the leg main body. And a protruding portion formed so as to extend toward the inside of the outer casing along a direction.

  In the present invention, the protrusion is formed so as to extend from the leg main body rotating with respect to the outer casing toward the inside of the outer casing along the rotation direction of the leg main body. For this reason, for example, the protrusion length of the leg main body from the outer surface of the outer casing can be changed as desired by locking the protrusion with an adjustment mechanism or the like and restricting the rotation of the leg main body. Moreover, since the length of the protrusion part which protrudes inside an exterior housing | casing can be taken larger than the conventional leg part (The leg part extended in a straight line and provided in the direction orthogonal to a bottom face part), Compared to the conventional configuration, the projection position can be changed without increasing the thickness dimension of the projector.

In the projector according to the aspect of the invention, the leg main body may be provided with a contact portion that protrudes in a direction away from the rotation shaft of the leg main body from a connection position with the protrusion and contacts the placement surface. Preferably it is.
In the present invention, the distance from the rotation axis of the leg body to the contact portion that contacts the mounting surface can be longer than the distance from the rotation axis of the leg body to the protrusion. For this reason, since the inclination of the exterior housing can be increased with a smaller rotation angle, the projection position of the projector can be changed over a wide range.

In the projector according to the aspect of the invention, it is preferable that the protrusion is provided with a rotation restricting portion that restricts the rotation of the leg main body when the leg main body rotates to a predetermined position.
In the present invention, when the leg main body is rotated to a predetermined position, the rotation of the leg main body is restricted by the rotation restricting portion. As a result, it is possible to prevent the leg portion from falling off the outer casing and to reliably rotate the leg main body within a range determined by the position of the rotation restricting portion.

In the projector according to the aspect of the invention, it is preferable that a length dimension from a rotation axis of the leg main body to a connection position of the leg main body and the protruding portion is larger than a thickness dimension of the exterior casing.
In the present invention, since the length dimension from the pivot axis of the leg body to the connection position of the leg body and the protrusion is larger than the thickness dimension of the exterior housing, the maximum pivot range of the leg body is 90. Less than °. Accordingly, when the leg main body is projected and retracted with respect to the exterior housing, the leg main body can be smoothly rotated in a direction corresponding to the projecting and retracting.

In the projector according to the aspect of the invention, it is preferable that the leg portion includes a substantially fan-shaped connection portion that connects the leg main body and the inner peripheral surface of the protruding portion.
In the present invention, since the leg portion includes the connection portion having the above-described configuration, the internal space of the exterior housing can be kept closed by the connection portion regardless of the rotation position of the leg portion main body. Accordingly, it is possible to improve the reliability of the projector by preventing dust and the like from entering the interior of the exterior housing and light leakage to the outside of the exterior housing.

FIG. 2 is a perspective view illustrating an appearance of a projector according to the embodiment. FIG. 2 is a perspective view illustrating an appearance of a projector according to the embodiment. The perspective view which shows the structure of the foot unit in this embodiment. The perspective view which shows the structure of the foot unit in this embodiment. The schematic diagram for demonstrating the structure of the foot unit in this embodiment. The figure for demonstrating operation | movement of the adjustment mechanism in this embodiment. The figure for demonstrating operation | movement of the foot unit in this embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[External configuration of the projector]
1 and 2 are perspective views showing the external appearance of the projector 1. Specifically, FIG. 1 is a perspective view of the projector 1 viewed from the upper front side, and FIG. 2 is a perspective view of the projector 1 viewed from the lower front side.
Hereinafter, in the projector 1, the projection side (the side on which the projection lens 2A is disposed) is referred to as a front surface, and the opposite side is referred to as a back surface. In addition, “upper”, “lower”, “left”, and “right” described below are obtained when the projector 1 is installed with the posture shown in FIG. It means left and right respectively.
The projector 1 projects an image and displays a projected image on a screen (not shown). As shown in FIGS. 1 and 2, the projector 1 includes an exterior casing 2 constituting an exterior and legs for changing the attitude of the projector 1 placed on the placement surface (changing the projection position). As a foot unit 3.

[Configuration of exterior casing]
As shown in FIGS. 1 and 2, the exterior housing 2 is formed in a substantially rectangular parallelepiped shape. The exterior housing 2 projects a light source device, a light modulation device such as a liquid crystal panel that modulates a light beam emitted from the light source device according to image information, and a projection that projects the light beam modulated by the light modulation device. The apparatus main body having the lens 2A and the like is accommodated.
Note that the apparatus main body is used in various general projectors, and is not specifically illustrated.

In the exterior casing 2, fixed legs 2 </ b> B are respectively provided at the corners on the back side of the bottom surface portion 21 as shown in FIG. 2.
These fixed legs 2B are provided so as to protrude from the outer surface of the bottom surface portion 21, and are portions that come into contact with the placement surface when the projector 1 is placed on the placement surface such as a desk.
An opening 2C that communicates the inside and outside of the exterior housing 2 is formed at a substantially central position in the left-right direction on the front surface side of the bottom surface portion 21, and the foot unit 3 is fitted into the opening 2C. .

[Configuration of foot unit]
3 to 5 are diagrams for explaining the configuration of the foot unit 3. Specifically, FIG. 3 is a perspective view of the foot unit 3 as viewed from the front upper side. FIG. 4 is an exploded perspective view of the foot unit 3. FIG. 5 is a schematic view of the projector 1 as seen from the right side.
As shown in FIGS. 3 and 4, the foot unit 3 includes a leg main body 4, a protruding part 5 connected to the leg main body 4, a connection part 6, an adjustment mechanism 7, and a support member 8.

[Configuration of leg body]
Like the fixed leg 2B, the leg main body 4 is a part that protrudes from the outer surface of the bottom surface portion 21, and is a portion that comes into contact with the placement surface when the projector 1 is placed on the placement surface. . As shown in FIGS. 3 to 5, the leg main body 4 is arranged such that an end on the back side is rotatable with respect to the bottom surface 21 about the rotation axis Ax via the connection portion 6. Yes. The rotation axis Ax is disposed along the direction (left-right direction) parallel to the bottom surface portion 21 and perpendicular to the projection direction, and the leg body 4 rotates about the rotation axis Ax. As a result, the abutting portion 41 is closely separated from the bottom surface portion 21. In other words, the length of the leg main body 4 protruding from the bottom surface portion 21 varies in conjunction with the rotation about the rotation axis Ax.

  As shown in FIGS. 3 to 5, the leg main body 4 has a contact portion that protrudes in a direction away from the rotation axis Ax from the connection position with the protrusion 5 (the front side in the state shown in FIG. 3). 41 is provided. The contact portion 41 is a portion that comes into contact with the placement surface when the exterior housing 2 is placed on the placement surface. Specifically, the contact portion 41 is made of an elastic member such as rubber, and has a substantially rectangular parallelepiped shape with round corners as shown in FIGS. 3 and 4. Thereby, irrespective of the rotation position of the leg main body 4, slip prevention and vibration absorption can be achieved, and the projector 1 can be placed stably. Further, as shown in FIG. 5, since the contact portion 41 is provided, from the rotation axis Ax to the portion that contacts the placement surface in the leg main body 4 when placed on the placement surface. Is longer than the length L from the rotation axis Ax to the connection position of the leg main body 4 and the protrusion 5 by a distance α. As shown in FIG. 5, the leg main body 4 and the protruding portion 5 are connected so that the length dimension L is larger than the thickness dimension T of the exterior housing 2. Further, the tip of the contact portion 41 is set so as to be on the back side of the front surface of the exterior housing 2.

(Structure of protrusion)
The protrusion 5 is directed from the leg main body 4 to the inside of the exterior casing 2 through the opening 2C in an arc shape along the rotation direction P (FIG. 5) of the leg main body 4 about the rotation axis Ax. It is formed to extend.
As shown in FIGS. 3 and 4, a plurality of concave portions 51 extending in the left-right direction are arranged in parallel in the protruding portion 5. The recess 51 is used when the rotation of the leg body 4 is adjusted by the adjusting mechanism 7 described later.

On both side surfaces in the left-right direction at the upper end portion of the protruding portion 5, step portions 52 are provided as rotation restricting portions. When the leg main body 4 is rotated to a predetermined position, the stepped portion 52 abuts on a step receiving portion 831 of the support member 8 described later, and the leg main body 4 rotates toward the outside of the exterior housing 2 ( (Rotation in the counterclockwise direction in FIG. 5) is restricted.
Note that the rotation of the leg main body 4 toward the inside of the exterior housing 2 is restricted by the contact portion 41 of the leg main body 4 coming into contact with the lower end portion 832 of the support member 8.
Thereby, the rotation of the leg main body 4 causes the stepped portion 52 to move from the state in which the contact portion 41 of the leg main body 4 contacts the lower end portion 832 of the support member 8 (the state shown in FIG. 3). 8 is restricted to a range until it abuts against the step receiving portion 831.
Moreover, the rail part 53 protruded in the left-right direction is provided in the both side surfaces of the left-right direction of the protrusion part 5 along the said side surface, respectively. The rail portion 53 is guided by the guide portion 833 of the support member 8. Thereby, the leg part main body 4 rotates smoothly.

(Configuration of connection part)
The connecting portion 6 has a substantially fan-like configuration for connecting the leg main body 4 and the inner peripheral surface of the protruding portion 5, and is disposed on the support member 8 so as to rotate about the rotation axis Ax. . This connection part 6 reinforces the leg main body 4 and the protrusion part 5 by the said structure.
Further, the connection portion 6 closes the opening 2C regardless of the rotation state of the leg main body 4, and functions to prevent entry of dust and the like and light leakage prevention.

[Configuration of adjustment mechanism]
The adjustment mechanism 7 is a part that changes the rotation state of the leg body 4 when operated by the user. As shown in FIG. 4, the adjustment mechanism 7 includes an operation member 71 and an urging member 72.
As illustrated in FIG. 4, the operation member 71 includes a base portion 711 having a substantially rectangular plate shape, and a lever portion 712.

The base 711 is a part that regulates the rotation of the leg body 4 by engaging with the protrusion 5. As shown in FIG. 4, a plurality of convex portions 711 </ b> A into which the respective concave portions 51 are inserted are formed in the lower portion of the rear end face of the base portion 711 corresponding to the respective concave portions 51 of the protruding portion 5.
Specifically, the plurality of convex portions 711A extend in the left-right direction, and are arranged in parallel from the upper side to the lower side at the lower portion of the end surface. In addition, the plurality of convex portions 711A have a convex shape that increases toward the lower side, and the base 711 and the protruding portion 5 are reliably engaged even if the protruding portion 5 has an arc shape.
A shaft portion 711B extending in the left-right direction is provided on the upper portion of the base portion 711, and the base portion 711 is disposed on the support member 8 so as to rotate around the shaft portion 711B.
The lever part 712 is a part operated by the user, and is integrally formed on the front side end face of the base part 711 as shown in FIG. 4 so as to be exposed to the front side of the exterior housing 2 from the opening 2C. Arranged.

As shown in FIG. 4, the urging member 72 is constituted by a torsion spring, and urges the lower portion of the base portion 711 toward the back side.
Specifically, the biasing member 72 is arranged such that one end of the torsion spring is fixed to the support member 8 and the other end is in contact with the lower part of the front end surface of the base 711, and the base 711 is applied by the force of the torsion spring. Energize the lower part of the head toward the back.

(Configuration of support member)
The support member 8 is a portion that is attached to the inner surface of the bottom surface portion 21 and supports the connection portion 6 and the adjustment mechanism 7. As shown in FIG. 4, the support member 8 includes a front wall 81 on the front side, a rear wall 82 on the back side, and a pair of side walls 83 on both the left and right sides, and has a cylindrical shape penetrating in the vertical direction. The support member 8 is fitted into the opening 2C so that no gap is generated, and is fixed to the exterior housing 2 with screws or the like.

The adjustment mechanism 7 described above is disposed on the front wall 81 side of the support member 8, and one end of the urging member 72 is attached.
In the pair of side walls 83, as shown in FIGS. 3 and 4, the above-described rotation axis Ax is disposed on the back side, and the shaft portion 711B is disposed on the front side.
A groove-shaped step receiving portion 831 with which the stepped portion 52 abuts is provided on the inner walls of the pair of side walls 83. Further, a step-shaped guide portion 833 that guides the rail portion 53 is provided on the inner wall of the pair of side walls 83 along the shape of the rail portion 53.

[Operation of adjustment mechanism]
FIG. 6 is a diagram for explaining the operation of the adjustment mechanism 7. Specifically, FIG. 6A shows a state where the lever portion 712 is not operated by the user, and FIG. 6B shows a state where the lever portion 712 is operated by the user.
In the state where the lever portion 712 is not operated by the user, the adjusting mechanism 7 is pressed against the back side (the protruding portion 5 side) of the lower portion of the base portion 711 by the biasing force of the biasing member 72 described above. ), Each convex portion 711A is inserted into each concave portion 51. That is, when the lever portion 712 is not operated by the user, the base portion 711 is positioned at an engagement position that engages with the protruding portion 5 and restricts the rotation of the leg main body 4.

  On the other hand, when the lever portion 712 is pressed upward by the user, the adjusting mechanism 7 rotates upward about the shaft portion 711 </ b> B, and the lower portion of the base portion 711 is moved against the urging force of the urging member 72. Pull to the front side. As a result, the lower portion of the base 711 moves to the front side (non-engagement position) as shown in FIG. 6B, and engages with the protrusion 5 (the relationship between each convex portion 711A and each concave portion 51). Is canceled. That is, the leg main body 4 can be rotated.

[Operation of foot unit]
FIG. 7 is a diagram for explaining the operation of the foot unit 3.
As shown in FIG. 7A, in a state in which the leg main body 4 is rotated to the maximum extent inside the exterior housing 2 (a state in which the above-described contact portion 41 or the like is in contact with the lower end portion 832 of the support member 8). The lower surface of the contact portion 41 and the tip of the fixed leg 2B (FIG. 2) have substantially the same protruding height position with respect to the bottom surface portion 21, and the projector 1 has a substantially horizontal posture.

In this state, as described above, the user operates the lever portion 712 to position the base portion 711 in the non-engagement position, and lifts the front side of the exterior housing 2 upward so that the legs can be moved according to the lifted distance. The main part 4 protrudes from the bottom part 21.
That is, the leg main body 4 is in a rotatable state (the state shown in FIG. 6B) when the base portion 711 is positioned at the non-engagement position by the user's operation described above. For this reason, the leg part main body 4 rotates so that it may protrude outside the exterior housing | casing 2 through the opening part 2C with dead weight.

Further, when the user's operation is released, the lower portion of the base 711 is pressed toward the back side by the urging force of the urging member 72 and is positioned at the engagement position, so that the rotation is restricted. (State shown in FIG. 6A). Thereby, for example, as shown in FIG. 7B, the leg main body 4 is in a state in which the rotation is restricted at a predetermined position, and the projector 1 is in an inclined posture in which the front side is located on the upper side with respect to the rear side. Maintain posture.
Then, when the posture of the projector 1 is further tilted, the stepped portion 52 abuts on the step receiving portion 831 as described above and the rotation of the leg main body 4 is restricted, as shown in FIG. The leg main body 4 is in a state of being rotated to the maximum extent outside the exterior housing 2.
Here, the case where the leg main body 4 is protruded with respect to the outer casing 2 has been described. However, in the case of immersing, the lever portion 712 is operated to position the base 711 at the non-engagement position and What is necessary is just to rotate the leg main body 4 contrary to the case where the front side of the body 2 is lowered and protruded.

According to this embodiment described above, the following effects are obtained.
Since the protruding portion 5 is locked by the adjusting mechanism 7, the rotation of the leg main body 4 can be restricted, and the protruding length of the leg main body 4 from the outer surface of the exterior housing 2 can be changed as desired. And since the protrusion part 5 is formed so that it may extend in circular arc shape along the rotation direction of the leg part main body 4, the length of the protrusion part which protrudes in the exterior housing | casing 2 is made into the conventional leg. Therefore, the projection position can be increased even if the displacement amount of the projection position is increased without increasing the thickness dimension of the projector 1 or the thickness dimension of the projector 1 is reduced as compared with the conventional configuration. It is possible to prevent the displacement amount from becoming small.
Since the contact portion 41 is located on the front side of the rotation axis Ax, the contact portion 41 contacts the placement surface when the leg body 4 is rotated toward the outside of the exterior housing 2. The position can be positioned on the back side as compared with the conventional configuration. For this reason, the projector 1 can be inclined at a large angle as compared with the conventional configuration.

Further, by providing the contact portion 41 on the leg main body 4, the distance from the rotation axis Ax to the contact portion 41 that contacts the mounting surface is increased by the distance α, and the distance can be maintained even at an equivalent rotation angle. Since the inclination of the exterior housing can be increased according to α, the amount of displacement of the projection position of the projector 1 can be increased. Further, the rotation range of the leg main body 4 can be reduced without reducing the displacement of the projection position, and the length of the protruding portion 5 can be shortened, so that the thickness dimension of the exterior housing 2 can be reduced.
Further, when the leg main body 4 is rotated to a predetermined position, the stepped portion 52 restricts the rotation of the leg main body 4 toward the outside of the outer casing 2, so that the foot unit 3 is detached from the outer casing 2. The leg main body 4 can be reliably rotated within a range determined by the position of the stepped portion 52.

In addition, since the length dimension L from the rotation axis Ax to the connection position of the leg body 4 and the protrusion 5 is larger than the thickness dimension T of the exterior housing 2, the maximum rotation range of the leg body 4 is It becomes smaller than 90 °. Accordingly, when the leg main body 4 is projected and retracted with respect to the exterior housing 2, the leg main body 4 can be smoothly rotated in a direction corresponding to the protrusion and collapse.
Furthermore, since the foot unit 3 includes the connecting portion 6, the opening 2 </ b> C can be kept closed by the connecting portion 6 regardless of the rotation position of the leg main body 4. The reliability of the projector 1 can be improved by preventing dust and the like from entering the exterior casing 2 and light leakage to the exterior of the exterior casing 2.

In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.
In the embodiment, the configuration of the adjustment mechanism 7 is not limited to the configuration described in the embodiment, and other configurations may be employed as long as the rotation of the leg main body 4 can be restricted at a predetermined position.
In the embodiment, the stepped portion 52 is provided on both side surfaces in the left-right direction. However, the configuration is not limited to this, and the stepped portion 52 may be provided only on one of the side surfaces, or may be provided on the front side.
In the embodiment, the support member 8 may be omitted, that is, the connection unit 6 and the adjustment mechanism 7 may be attached to the exterior housing 2.
In the embodiment, only one foot unit 3 is provided. However, the present invention is not limited to this, and a plurality of foot units 3 may be provided.

  The projector of the present invention can be used as a projector used in presentations and home theaters.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 3 ... Foot unit (leg part), 4 ... Leg main part, 5 ... Projection part, 6 ... Connection part, 21 ... -Bottom part, 41 ... Contact part, 52 ... Step part (turning restricting part), Ax ... Turning shaft.

Claims (5)

A projector comprising an exterior housing that constitutes an exterior, and a leg that contacts the placement surface when the exterior housing is placed on the placement surface,
The legs are
A leg main body that rotates with respect to the outer casing and changes a protruding length from the outer surface of the outer casing in conjunction with the rotation;
A projector comprising: a projecting portion formed to extend from the leg main body toward the inside of the exterior casing along a rotation direction of the leg main body. The projector according to claim 1.
In the leg body,
A projector that protrudes in a direction away from the rotation shaft of the leg main body from a connection position with the protrusion, and is provided with a contact portion that contacts the mounting surface. The projector according to claim 1 or 2,
In the protrusion,
A projector that includes a rotation restricting portion that restricts rotation of the leg main body when the leg main body rotates to a predetermined position. The projector according to any one of claims 1 to 3,
The length dimension from the rotating shaft of the said leg part main body to the connection position of the said leg part main body and the said protrusion part is larger than the thickness dimension of the said exterior housing | casing. The projector according to any one of claims 1 to 4,
The legs are
A projector comprising: the leg main body; and a substantially fan-shaped connecting portion that connects an inner peripheral surface of the protruding portion.

Images