JP2009031489A - Angle-adjusting mechanism for projector apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angle-adjusting mechanism for a projector apparatus capable of maintaining an angle adjusted beforehand, even when load other than own weight of the projector apparatus is applied to the top surface of the projector apparatus. <P>SOLUTION: The angle adjusting mechanism for the projector apparatus comprises a sliding leg part 52 provided protrusively to be slidable downward; a plurality of first engaging protrusion parts 611 protrusively arranged at the side face of the sliding leg part; and a stopper member 60, protrusively provided with a plurality of second engaging protrusion parts 621 that can be engaged with and separated from the first engaging protrusion parts 611; and the stopper member is energized with a force to the sliding leg part 52 at all times. First locking parts 612, formed facing upward, of the first engaging protrusion parts 611, and second locking parts 622, formed facing downward, of the second engaging protrusion parts 621, are in contact with each other and are formed so as not to slip. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an angle adjustment mechanism for adjusting a projection angle of a projector device that projects an image on a screen.

  A front projection type projector device is used as a video display device for presentation or home theater. The projector device projects an image from the front side (viewer side) of the screen onto a screen arranged to face the viewer.

  The projector device includes a lens that emits an image projected on the screen in front. The image is enlarged and projected onto the screen through the lens. When projecting an image on the screen, the projector device adjusts the angle in the front-rear direction (elevation angle) so that the projected image is within the screen. In addition, the tilt angle is adjusted so that the projected image is correctly leveled.

  The angle adjustment of the conventional projector apparatus will be described with reference to the drawings. FIG. 8 is a side view of a conventional projector apparatus, and FIG. 9 is a front view of the projector apparatus shown in FIG. The projector device 91 is installed on the upper surface of the installation table 92, and is supported by three leg portions 93, 94, 95 protruding from the bottom surface. Of the three legs, two (93, 94 in the figure) are attached to the screen side (front side), and the remaining legs 95 are arranged on the back side. Although not limited thereto, here, the attachment portion of the leg portion 93 and the attachment portion of the leg portion 94 are equidistant from the attachment portion of the leg portion 95.

  The leg portion 93 is fixed to the bottom surface of the projector device 91, but the leg portion 94 and the leg portion 95 are provided with an elevating mechanism, and the length of the leg portion 94 and the leg portion 95 is within a predetermined range. Can be freely adjusted between.

  When adjusting the angle of the projector device 91, it is possible to adjust the video projected on the screen in different directions by moving one of the adjustable legs 94 and 95. That is, when the leg part 95 is fixed and the leg part 94 is expanded and contracted, the horizontal angle (left and right up and down) of the image projected on the screen can be adjusted. Further, when the leg portion 94 is fixed and the leg portion 95 is moved up and down, the vertical position of the front side and the rear side of the projector device 91 can be adjusted, and the vertical direction of the image relative to the screen can be adjusted. .

  As the adjustable leg raising / lowering mechanism, for example, a rotatable member is attached to a portion that comes into contact with the installation base of the leg, a male screw is formed on the leg main body, and a female screw formed on the bottom surface of the projector device 91 There are some which extend and contract the leg portion with respect to the projector device 91 by being screwed into the hole and rotated.

  In the invention described in Japanese Patent Application Laid-Open No. 2003-5279, the rack gear formed on the leg portion and the pinion gear disposed inside the projector device mesh with each other, and the pinion gear is used as a power source such as a motor. An elevating mechanism is described in which the leg portion is expanded and contracted by rotating it using the.

  Japanese Patent Laid-Open No. 2000-241875 has a female screw formed inside the telescopic foot, a male screw screwed into the female screw is arranged, and the male screw is rotated by a drive motor or manually, It describes what stretches the foot.

  Further, Japanese Patent Application Laid-Open No. 2006-106487 has a rack gear attached to the adjustment leg and a worm that meshes with the rack gear. And what adjusts the height and angle is described.

  In the case of a device having a complicated lifting mechanism as described above, the manufacturing takes time and costs. In view of this, a lifting mechanism having the following structure is used as a lifting mechanism for a projector apparatus that can be operated with a simple operation while reducing costs.

  FIG. 10 is a schematic view of the lifting mechanism of the projector apparatus shown in FIG. FIG. 10 is a diagram showing the inside of the projector device 91. For the sake of convenience, the description will be made assuming that it is provided in the leg portion 94, but the leg portion 95 is also provided with a device having a similar mechanism.

  As shown in FIG. 10, the elevating mechanism 96 includes a rectangular frame-shaped stopper member 961 having a through-hole through which the leg portion 94 penetrates in the center, a first rack portion 962 formed on the side wall portion of the leg portion 94, A second rack portion 963 formed at a portion of the inner wall portion of the through hole of the stopper member 961 facing the first rack portion 962 and an outer wall portion of the stopper member 961 are attached, and the second rack portion 963 is attached to the first rack portion. And a pressing member 964 that pushes toward 962.

  When the stopper member 961 is pushed by the pressing member 964, the first rack portion 962 and the second rack portion 963 are engaged, and the expansion and contraction of the leg portion 94 is suppressed. A force is applied to the stopper member 961 in the direction opposite to the direction in which the force is urged from the pressing member 964, and the stopper member 961 is moved. After disengaging the first rack portion 962 and the second rack portion 963, the first rack portion 962 and the second rack portion 963 are engaged by adjusting the expansion and contraction of the leg portion 94 to remove the force. Then, the leg portion 94 is adjusted.

  In the case of the projector device 91 shown in FIG. 10, the engaging convex portion 9621 of the first rack portion 962 provided on the leg portion and the engaging convex portion 9631 of the second rack portion 963 provided on the stopper member 961 are provided. The expansion and contraction state of the leg is adjusted by the engagement. As shown in FIG. 10, the engaging convex portions 9621 and 9631 of the first rack portion 962 and the second rack portion 963 are formed so as to become narrower toward the tip. In this way, the engagement protrusion 9621 (9631) can be easily inserted into the adjacent gap of the mating engagement protrusion 9631 (9621) by forming the tip to be thin.

JP 2003-5279 A JP 2000-241875 A JP 2006-106487 A

  Before the projector device 91 is shipped to the market, a plurality of tests assuming a state in use are performed. In actual use, articles are often placed on top of the projector device 91. Therefore, as a test before shipping, a test for confirming the malfunction of the projector device 91 is performed in a state where a predetermined static load (13.6 kg: 30 lb) is applied to the top surface of the projector device 91.

  However, when a load such as the above-described test is applied to the projector device 91 provided with the lifting mechanism 96, the skewed portion of the engaging convex portion 9631 of the second rack portion 963 and the engaging convex portion of the first rack portion 962 are applied. When a load acts in a direction deviating between the inclined portion of the portion 9621 and a force opposite to the pressing force of the pressing member 964 acts, and the engagement between the first rack portion 962 and the second rack portion 963 is released. There is.

  If the first rack part 962 and the second rack part 963 are disengaged from each other, the angle of the projector device 96 is deviated, and the video cannot be displayed on the screen with high accuracy.

  Therefore, the present invention provides an angle adjustment mechanism for a projector device that can maintain a pre-adjusted angle even when a load other than the weight of the projector device acts on the top surface of the projector device. Objective.

  In order to achieve the above object, the present invention includes a slide leg projecting so as to be slidable downward from a lower part of the main body, and a side surface of the slide leg part in a sliding direction of the slide leg part. A plurality of projecting first engaging projections; and a stopper member projecting a plurality of second engaging projections that can be engaged with and separated from the plurality of first engaging projections. And the stopper member is an angle adjusting mechanism of the projector device in which a force is constantly urged against the sliding leg portion, wherein the plurality of first engaging convex portions and the plurality of second engaging convex portions are provided. Are engaged with each other, at least a first locking portion formed facing upward of the first engaging convex portion and a second portion formed facing downward of the second engaging convex portion. When the locking portion is in contact, and the first locking portion and the second locking portion are pressed with a predetermined force in the sliding direction of the sliding leg, The sliding direction component of the stopper member of the force acting in the sliding direction of the first locking portion and the second locking portion is formed to be smaller than the force biased by the stopper member. Yes.

  According to this configuration, even when a predetermined static load (13.6 kg: 30 lb) is applied to the upper surface of the projector device, the sliding due to the static load of the first locking portion and the second locking portion. Can be suppressed.

  Thereby, even when the static load is applied to the projector device, the first engagement convex portion and the second engagement convex portion are not disengaged. It is possible to suppress deviation.

  In the above configuration, either the first engaging convex portion or the second engaging convex portion is larger than the size of the concave groove formed between the adjacent engaging convex portions of the other engaging convex portion. It may be formed small.

  According to this configuration, the first engagement convex portion and the second engagement convex portion do not come into contact with each other in the portion other than the first engagement portion and the second engagement portion. It is possible to easily insert the mating convex portion into the concave groove formed between the first engaging convex portions.

  Accordingly, the first engaging convex portion and the second engaging convex portion can be easily engaged with each other in a state where the sliding leg portion is protruded by a predetermined amount from the bottom surface of the projector device. It is possible to easily adjust the angle.

  The said structure WHEREIN: The plane orthogonal to the sliding direction of the said sliding leg part may be sufficient as a said 1st latching | locking part and a said 2nd latching | locking part. In addition, even if an error of about 0.5 degrees occurs due to the method of processing (resin integral molding), it is possible to sufficiently suppress the slip due to the load.

  In the above configuration, the first engaging convex portion includes a first oblique surface portion formed downward and the second engaging convex portion includes a second oblique surface portion formed upward. May be. According to this configuration, since both the first engagement convex portion and the second engagement convex portion have oblique surfaces, the opening of the groove end of both engagement convex portions becomes large, It can be easily engaged. Examples of the first oblique surface portion and the second oblique surface portion include those formed so as to be parallel to each other.

  The said structure WHEREIN: At least one edge part of the said 1st engagement convex part and the said 2nd engagement convex part may be provided with the slope part formed so that the front-end | tip may become narrow. According to this configuration, since the slope portion introduces the other engagement convex portion into the concave groove, the engagement is easy.

  According to the present invention, it is possible to provide an angle adjustment mechanism for a projector apparatus that can maintain a pre-adjusted angle even when a load other than the weight of the projector apparatus acts on the top surface of the projector apparatus. it can.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view showing a usage state of the projector apparatus according to the present invention, FIG. 2 is a side view of the projector apparatus shown in FIG. 1, and FIG. 3 is a front view of the projector apparatus shown in FIG. As shown in FIG. 1, the projector device 1 is placed on top of the installation stand St and projects an image on a screen Sc arranged on the front side.

  As shown in FIGS. 2 and 3, the projector device 1 includes a case 2, a video generation device 3, a projection lens 4, and an angle adjustment mechanism 5. The case 2 is a hollow box-shaped member, in which the video generation device 3 is stored. A projection lens 4 is attached to the front surface 21.

  The video generation device 3 includes a light source (not shown) and a video engine that splits light emitted from the light source and forms a video. The light including the image formed by the image engine enters the projection lens 4. The projection lens 4 enlarges the incident video image so as to match the size of the screen Sc, and focuses the image to project the image onto the screen Sc. The projection lens 4 is not limited to this, but here is a combination of a plurality of glass lenses.

  The angle adjustment mechanism 5 includes a first leg 51, a second leg 52, and a third leg 53. As shown in FIG. 2 or 3, the first leg 51, the second leg 52 and the third leg 53 protrude from the bottom surface 22 of the case 2. The first leg 51, the second leg 52, and the third leg 53 are each a rectangular parallelepiped leg main body 511, 521, 531 and larger than the cross-sectional area of the leg main body attached to the distal end of the leg main body, In addition, support portions 512, 522, and 532 each having a bottom surface formed in a curved shape are provided. Leg main bodies 521 and 531 of the second leg portion 52 and the third leg portion 53 pass through a through hole 221 formed in the bottom surface 22.

  The 1st leg part 51 and the 2nd leg part 52 are arrange | positioned in the front side of the bottom face 22, and left and right apart, and the 3rd leg part 53 is arrange | positioned in the center of the back side. . The first leg 51 is fixed, and the second leg 52 and the third leg 53 are legs that can adjust the amount of protrusion from the bottom surface 22, in other words, the amount of expansion and contraction of the legs. It is.

  The extendable leg portion will be described in detail. The angle adjustment mechanism 5 of the projector device 1 adjusts the amount of protrusion from the bottom surface 22 of the second leg part 52 and the third leg part 53 in addition to the first leg part 51, the second leg part 52, and the third leg part 53. And has a stopper mechanism for preventing the dropout.

  Hereinafter, the stopper mechanism will be described. Although both the second leg portion 52 and the third leg portion 53 are provided with a stopper mechanism having the same configuration, the stopper mechanism provided in the second leg portion 52 will be described for the sake of convenience. 4 is a schematic view of a stopper mechanism provided in the second leg portion of the projector device shown in FIG. 2, and FIG. 5 shows a state in which the stopper mechanism shown in FIG. 4 prevents the second leg portion from falling off. FIG.

  As shown in FIG. 4, the bottom surface 22 includes a rectangular parallelepiped box-shaped housing portion 23 formed so as to surround the through hole 221 inside. The housing portion 23 has a through hole 231 formed in the same shape and size as the through hole 221 on the surface facing the bottom surface 22, an opening 232 formed side by side with the through hole 231 in the longitudinal direction of the housing portion 23, and Of the end surfaces formed in the longitudinal direction of the housing portion 23, the housing portion 23 has an insertion port 234 formed in the end surface 233 opposite to the opening portion 232 of the through hole 231.

  The stopper mechanism 6 includes a stopper member 60, a first rack portion 61, a second rack portion 62, a pressing member 63, an extendable button 64, and an extendable lever 65.

  The stopper member 60 is a rectangular cylindrical member having a penetrating portion 600 surrounded by four wall portions. A protruding portion 601 is formed outside the wall portion arranged side by side in the longitudinal direction of the stopper member 60. The stopper member 60 is inserted into the housing portion 23 through the insertion port 234 so that the protruding portion 601 is at the back, and is disposed so as to be slidable in the longitudinal direction of the housing portion 23.

  When the stopper member 60 is disposed on the housing portion 23, the protruding portion 601 has a slope portion 602 that is vertically overlapped with the opening 232 and is inclined so as to approach the penetrating portion 600 of the stopper member 60 downward. Have.

  When the leg main body 521 of the second leg portion 52 is inserted into the through-hole 221, the first rack portion 61 has a surface facing the end surface 235 opposite to the end surface 233 where the insertion port 234 of the housing portion 23 is formed. Has been placed. Although the first rack portion 61 is not limited to this, the first rack portion 61 is completely housed in the recessed hole formed in the second support leg portion 52 and is integrally formed with the leg main body 521. . The first rack portion 61 has a plurality of first engaging convex portions 611 arranged side by side with a predetermined interval in the longitudinal direction of the leg main body 521. The first engaging convex portion 611 has a quadrangular prism shape, and is disposed so as to extend in a direction orthogonal to the longitudinal direction of the second leg portion 52.

  The second rack portion 62 is disposed on the inner side of the wall portion where the protruding portion 601 of the stopper member 60 is formed. The second rack portion 62 is formed integrally with the stopper member 60, although not limited thereto. The second rack part 62 is formed with four second engaging convex parts 621 formed to face the first engaging convex part 611 of the first rack part 61. The second engaging convex part 621 is a rectangular parallelepiped member extending in the same direction as the first engaging convex part 611.

  The pressing member 63 engages with the protruding portion 601 of the stopper member 60 and is in contact with the end surface 235 on the opposite side to the end surface where the insertion port 234 of the housing portion 23 is formed. Although not limited thereto, the pressing member 63 is a coil spring that generates an elastic force. In addition to the coil spring, a member that can press the stopper member 60 can be widely used. The stopper member 60 is always pressed toward the insertion port 234 by the pressing force of the pressing member 63.

  The extendable button 64 is formed so that a part thereof protrudes from the upper surface 20 of the case 2. The expansion / contraction button 64 is connected to the expansion / contraction lever 65, and the end of the expansion / contraction lever 65 opposite to the connection of the expansion / contraction button 64 is in contact with a part of the slope portion 602. Although not shown in the figure, the elastic button 64 is provided with an elastic member, and is urged so that a part of the elastic button always protrudes from the upper surface 20 of the case 2.

  As shown in FIG. 4, the leg main body 521 of the second leg portion 52 is disposed through the through hole 231 of the housing portion 23 and the through hole 221 of the bottom surface 22. In addition, the leg main body 521 passes through the penetrating portion 600 of the stopper member 60 inside the housing portion 23. Although the stopper member 60 is pushed toward the insertion port 234 by the pressing member 63, the stopper member 60 is prevented from coming out of the insertion port 234 by being penetrated by the leg main body 521 of the second leg portion 52. Further, when the second rack part 62 is pressed against the first rack part 61, the four second engaging convex parts 621 of the second rack part 62 become a plurality of first engaging convex parts of the first rack part 61. 611, the first engagement convex portion 611 of the first rack portion 61 and the second engagement convex portion 621 of the second rack portion 62 are engaged with each other, and the longitudinal direction of the second leg portion 52 (see FIG. The movement in the vertical direction is limited.

  The first rack part 61 and the second rack part 62 will be described in more detail. As shown in FIG. 5, the first engaging convex portion 611 of the first rack portion 61 includes a locking portion 612 having a plane perpendicular to the axis of the leg main body 521 of the second leg portion 52, and the locking portion 612. And a skew portion 613 formed on the opposite side. As shown in FIG. 5, a locking portion 612 is formed on the first engagement convex portion 611 on the side opposite to the support portion 522 of the second leg portion 52 (that is, the upper side in FIG. 5). The skew portion 613 is inclined so as to approach the locking portion 612 as the distance from the leg main body 521 increases.

  As shown in FIG. 5, the second rack portion 62 is formed on the opposite side of the locking portion 622 with a locking portion 622 having a plane orthogonal to the axis extending in the longitudinal direction of the leg main body 521 of the second leg portion 52. And a skewed portion 623. As shown in FIG. 5, in the second engagement convex portion 621, the locking portion 622 is formed on the bottom surface 22 side. The skew portion 623 is inclined so as to approach the locking portion 622 as the distance from the leg main body 521 increases.

  The inclined portion 613 and the inclined portion 623 have the same inclination angle with respect to the axis of the leg main body 521 of the second leg portion 52. When the second rack part 62 is engaged with the first rack part 61, the locking part 612 of the first rack part 61 and the locking part 622 of the second rack part 62 are in contact with each other. A force due to its own weight acts downward on the projector device 1. The force due to the dead weight acts on the locking portion 612 of the first rack portion 61 from the locking portion 622 of the second rack portion 62. The force due to the weight of the projector device 1 acts in a direction along the axis extending in the longitudinal direction of the second leg portion 52.

  The locking portion 612 of the first engaging convex portion 611 has a surface perpendicular to the axis extending in the longitudinal direction of the second leg portion 52, and the locking portion 622 of the second engaging convex portion 621 is connected to the locking portion 612. Since they are in contact, the force acting on the locking portion 612 from the locking portion 622 acts on the locking portion 612 perpendicularly. Further, the stopper member 60 is pressed by the pressing member 63 toward the first rack portion 61. As a result, the locking portion 622 of the second engaging convex portion 621 slides on the locking portion 612 of the first engaging convex portion 611, and the second engaging convex portion 621 is disengaged from the first engaging convex portion 611. Can be suppressed. Thereby, since the state in which the second rack portion 62 is engaged with the first rack portion 61 can be maintained, it is possible to suppress the second leg portion 52 from expanding and contracting with respect to the bottom surface 22.

  The first engagement convex portion 611 of the first rack portion 61 and the second engagement convex portion 621 of the second rack portion 62 are different in size. Although not limited thereto, here, the second engagement convex portion 621 of the second rack portion 62 is formed to be small, and when the first engagement convex portion 611 and the second engagement convex portion 621 are engaged, The inclined portion 613 of the first engaging convex portion 611 and the inclined portion 623 of the second engaging convex portion 621 face each other and are in a non-contact state. That is, a gap is formed between the skew portion 613 and the skew portion 623.

  One surface of the first engaging convex portion 611 and the second engaging convex portion 621 is formed on the skewed portions 613 and 623 and the tip of the engaging convex portion is formed to be thin. When the stopper member 60 slides, the skewed portion 623 of the second engaging convex portion 621 slides while contacting the skewed portion 613 of the first engaging convex portion 611, so that the second engaging convex portion The locking portion 622 of the portion 621 is guided to the locking portion 612 of the first engagement convex portion 611. Thereby, the second rack portion 62 can be easily engaged with the first rack portion 61.

  By forming a gap between the skew portion 613 and the skew portion 623, when the stopper member 60 is slid, the second engagement convex portion 621 of the second rack portion 62 becomes the first rack portion. It is easily inserted as compared with the case where there is no gap between the first engaging convex portions 611 of 61. Thereby, the 1st rack part 61 and the 2nd rack part 62 which are arrange | positioned in the place (inside of case 2) which cannot be normally seen can be easily engaged.

  By using the stopper mechanism 6, the second leg portion 52 can adjust the amount protruding from the bottom surface 21 of the case 2 and can stop in the adjusted state. Hereinafter, the extending and contracting operation of the second leg portion 52 will be described. In the stopper mechanism 6, when the expansion / contraction button 64 is pressed, the expansion / contraction lever 65 connected to the expansion / contraction button 64 is pressed downward. The tip of the telescopic lever 65 pushes the inclined surface portion 602 of the stopper member 60. The stopper member 602 is slid to the opposite side of the insertion hole 234 when the tip of the telescopic lever 65 pushes the inclined surface portion 602, and the second engaging convex portion 621 of the second rack portion 62 and the first rack portion 61 are first. The engagement with the engagement convex portion 611 is released.

  In this state, the amount of protrusion of the second leg portion 52 from the bottom surface 22 can be adjusted by moving the case 2 up and down or by extending and contracting the second leg portion 52. During this adjustment, the telescopic button 64 remains pressed. When the adjustment is completed, the expansion / contraction button 64 is returned. As a result, the force applied to the inclined surface portion 602 acting from the tip of the telescopic lever 65 is removed, and the stopper member 60 is slid toward the insertion port 234 by the pressing member 63. By this sliding, the first engagement convex portion 611 of the first rack portion 61 and the second engagement convex portion 621 of the second rack portion 62 are engaged, and the second leg portion 52 is fixed.

  Although the details of the third leg portion 53 are omitted, the third leg portion 53 is formed in the same configuration as the second leg portion 52 and has the same expansion / contraction mechanism and operation. Since the first leg 51 is fixed, it is possible to adjust the left and right heights (tilts) of the projector device 1 by adjusting the amount of protrusion (extension / contraction) of the second leg 52, and the screen It is possible to adjust the horizontal inclination of the image projected on Sc. Further, one third leg 53 is provided on the back side, and the height (inclination) of the projector device 1 in the front-rear direction is adjusted by adjusting the protrusion amount (expansion / contraction amount) of the third leg 53. ) Can be adjusted. Thereby, the image projected on the screen Sc can be moved in the vertical direction.

  The projector device 1 is subjected to a test for applying a static load before shipment. In the static load test, a heavy object having a predetermined weight is placed on the upper surface 20 of the projector apparatus 1 to check the operating state of the angle adjustment mechanism. The weight of the heavy object is not limited to this, but here About 13.6 kg (30 lb). By applying this load, the stopper mechanism 6 is biased with a force corresponding to the weight of the heavy object in addition to the weight of the projector device 1.

  When the locking portion 612 of the first engaging convex portion 611 and the locking portion 622 of the second engaging convex portion 621 are formed on surfaces orthogonal to the sliding direction of the second leg portion 52, Even if a force acts in the sliding direction, no sliding force acts between the locking portion 612 and the locking portion 622. However, it is difficult to form them so as to be perpendicular to each other in terms of the processing method, and they are manufactured in a direction in which slip occurs. At this time, the inclination angle is a sliding direction component of the stopper member 60 of the sliding force generated between the locking portion 612 and the locking portion 622 when a load due to its own weight and heavy weight is applied. Any angle that is smaller than the pressing force by the pressing member 63 may be used. As an angle, for example, an angle that can be formed by integral molding of resin, which is shifted by 0.5 degrees from the right angle with respect to the sliding direction, that is, an angle of 89.5 degrees can be given as an example. Moreover, it is not limited to this.

  Another example of the stopper mechanism used in the projector device according to the present invention will be described. FIG. 6 is a view showing another example of a stopper mechanism used in the projector apparatus according to the present invention. The stopper mechanism 7 shown in FIG. 6 has the same configuration as that of the stopper mechanism 6 except that the first rack portion 71 and the second rack portion 72 are used, and detailed description of those having substantially the same configuration is omitted. To do.

  As shown in FIG. 6, the first rack portion 71 has a first engagement convex portion 711 protruding from the side wall portion of the second leg portion 52. The first engaging convex part 711 has a locking part 712 having a surface perpendicular to the axis extending in the longitudinal direction of the second leg part 52 and a horizontal part 713 having a surface perpendicular to the axis. In the first engagement convex part 711, a locking part 712 is formed on the side opposite to the support part 522 of the second leg part 52 (that is, the upper side in FIG. 6). The horizontal part 713 is formed on the opposite side of the first engaging convex part 711.

  The second rack portion 72 has a second engagement convex portion 721 that protrudes from the inner wall portion of the stopper member 70. The second engaging convex part 721 includes a locking part 722 having a plane orthogonal to the axis extending in the longitudinal direction of the leg body 521 of the second leg part 52, and a horizontal part 723 formed on the opposite side of the locking part 722. have. As shown in FIG. 6, in the second engagement convex portion 721, the locking portion 722 is formed on the bottom surface 22 side. The horizontal portion 723 is formed on the side opposite to the bottom surface 22 side.

  The locking portion 712 of the first rack portion 71 and the locking portion 722 of the second rack portion 72 have the same structure as the first rack portion 61 and the second rack portion 62 shown in FIG. Expansion and contraction to the outside of the bottom surface 22 of the two leg portions 52 can be suppressed.

  As shown in FIG. 6, the second engagement convex portion 721 is formed smaller than the first engagement convex portion 711, and the first engagement convex portion 711 and the second engagement convex portion 721 are formed. When engaged, the horizontal portion 713 and the horizontal portion 723 are formed in a non-contact state. As a result, when the stopper member 70 slides, the second engagement protrusion 721 is easily inserted into the gap between the adjacent first engagement protrusions 711, so that the second leg 52 protrudes from the bottom surface 22. The amount can be easily adjusted.

  Still another example of the stopper mechanism used in the projector device according to the present invention will be described. FIG. 7 is a view showing still another example of the stopper mechanism used in the projector apparatus according to the present invention. The stopper mechanism 8 shown in FIG. 7 has the same configuration as the stopper mechanism 7 shown in FIG. 6 except that the first rack portion 81 and the second rack portion 82 are different, and the first rack portion 81 and the second rack portion are the same. Detailed descriptions of portions other than the portion 82 are omitted.

  An introduction portion 810 formed by cutting and chamfering a ridge line portion at the distal end portion of the first engagement convex portion 811 of the first rack portion 81 and the second engagement convex portion 821 of the second rack portion 82, and The introduction part 820 is formed so as to be individually connected to each surface arranged in the longitudinal direction of the second leg part 52. The introduction portion 810 and the introduction portion 820 are surfaces inclined at a predetermined angle with respect to the longitudinal axis of the second leg portion 52.

  By having the introduction portions 810 and 820, when the stopper member 80 is slid and the second rack portion 82 is engaged with the first rack portion 81, the introduction formed on the second engagement convex portion 821 is formed. The portion 820 comes into contact with the introduction portion 810 formed on the first engagement convex portion 811 and slides in contact with the introduction portion 810, so that the second engagement convex portion 821 is adjacent to the first engagement convex portion. Since it can be introduced into the gap 811, the first rack portion 81 and the second rack portion 82 can be easily engaged.

  In the stopper mechanism 8 shown in FIG. 7, an example in which the introduction portions 810 and 820 are formed on both the first engagement convex portion 811 and the second engagement convex portion 821 has been described, but at least one of them is described. It only has to be formed. By being formed on one side, the other ridge line portion comes into contact with the introduction portion and slides on the introduction portion, so that the second engagement convex portion 821 is placed in the gap between the adjacent first engagement convex portions 811. It is possible to guide.

  In the above-described example, the introduction portions 810 and 820 are surfaces formed so as to leave the front-side surfaces 814 and 824 of the first engagement convex portion 811 and the second engagement convex portion 821. 810s or introduction parts 820 may be formed adjacent to each other. In this way, by eliminating the front-side surfaces 814 and 824 of the first engagement convex portion 811 and the second engagement convex portion 821, when the second rack portion 82 is engaged with the first rack portion 81, It is possible to prevent the front end surface 824 from contacting the front end side surface 814 and prevent the stopper member 80 from sliding, and the second rack portion 82 can be reliably engaged with the first rack portion 81. It is.

  As mentioned above, although embodiment of invention was described concretely, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary.

  The present invention can be applied in an angle adjustment climate of a projector apparatus that appropriately adjusts an image projected on a screen.

It is a side view which shows the use condition of the projector apparatus concerning this invention. It is a side view of the projector apparatus shown in FIG. It is a front view of the projector apparatus shown in FIG. It is the schematic of the stopper mechanism with which the 2nd leg part of the projector apparatus shown in FIG. 2 was equipped. It is a figure which shows the state which the stopper mechanism shown in FIG. 4 has prevented dropping of the 2nd leg part. It is a figure which shows the other example of the stopper mechanism used for the projector apparatus concerning this invention. It is a figure which shows the further another example of the stopper mechanism used for the projector apparatus concerning this invention. It is a side view of the conventional projector apparatus. It is a front view of the projector apparatus shown in FIG. It is the schematic of the raising / lowering mechanism of the projector apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector apparatus 2 Case 3 Image | video production | generation apparatus 4 Projection lens 5 Angle adjustment mechanism 51 1st leg part 52 2nd leg part 53 3rd leg part 6 Stopper mechanism 60 Stopper member 61 1st rack part 611 1st engagement convex part 612 Locking part 62 Second rack part 621 Second engaging convex part 622 Locking part 63 Pressing member 64 Telescopic button 65 Telescopic lever

Claims (7)

A sliding leg that protrudes downward from the bottom of the main body,
A plurality of first engaging protrusions that are arranged side by side in the sliding direction of the sliding leg from the side surface of the sliding leg;
And a stopper member provided with a plurality of second engaging protrusions that can be engaged and separated with the plurality of first engaging protrusions, and the stopper member always applies force to the sliding leg portion. Is an angle adjustment mechanism of the projector device being energized,
When the plurality of first engaging convex portions and the plurality of second engaging convex portions are engaged, at least the first locking formed to face upward of the first engaging convex portion. And a second locking portion formed facing the lower side of the second engaging convex portion are in contact with each other,
When the angle of the first locking portion and the second locking portion with respect to the sliding direction of the sliding leg is pressed with a predetermined force in the sliding direction of the sliding leg, the first The sliding direction component of the stopper member of the force acting in the sliding direction of the first locking portion and the second locking portion is formed to be smaller than the force biased by the stopper member. An angle adjustment mechanism for a projector device, characterized in that:   Either the first engaging convex portion or the second engaging convex portion is formed to be smaller than the size of the concave groove formed between the adjacent engaging convex portions of the other engaging convex portion. The angle adjustment mechanism of the projector apparatus according to claim 1.   The first engaging convex portion is formed in a concave hole formed in a side surface of the sliding leg portion, and the engaging convex portion is completely accommodated in the concave hole. Or the angle adjustment mechanism of the projector apparatus of Claim 2.   The angle adjustment mechanism of the projector device according to any one of claims 1 to 3, wherein an angle of the first locking portion and the second locking portion with respect to a sliding direction of the sliding leg portion is 90 degrees.   2. The first oblique surface portion formed with the first engaging convex portion facing downward, and the second oblique surface portion formed with the second engaging convex portion facing upward, respectively. An angle adjusting mechanism for a projector device according to claim 4.   The angle adjustment mechanism of the projector device according to claim 5, wherein the first oblique surface portion and the second oblique surface portion are formed so as to be parallel to each other.   The at least one edge part of the said 1st engagement convex part and the said 2nd engagement convex part is provided with the slope part formed so that the front-end | tip might become narrow. Angle adjustment mechanism of projector apparatus.

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