JP7216901B1 - projection device - Google Patents

Abstract

A projection apparatus having a tilting mechanism capable of increasing the degree of freedom in design is provided. A projection device (10) includes a housing (20), a rail member (52) provided inside the housing (20) and having a first engaging portion (61), and a slide member (53) provided inside the rail member (52). It has a leg member 51 which is movably provided and has a second engaging portion 62 which is engaged with the first engaging portion 61 by means of the uneven engagement 60 . [Selection drawing] Fig. 2

Description

The present invention relates to projection devices.

2. Description of the Related Art Conventionally, there has been disclosed a tilting mechanism provided in a projection apparatus for projecting an image formed using a micromirror display element called a DMD (digital micromirror device) or a liquid crystal plate onto a screen. For example, the projection device of Patent Document 1 is provided with a projector pedestal unit provided with a pair of posture adjustment devices as a tilt mechanism on the bottom surface of the case. The posture adjustment device includes an extendable leg, a holding portion, and a release button projecting from the frame portion of the base unit. The extensible leg has a male thread and is screwed into a split nut that can be opened and closed like scissors and is biased in the closing direction. The projection angle can be set by pressing the release button to move the telescoping leg by a large amount, and by screwing the telescoping leg and the split nut together for fine adjustment.

JP 2010-186119 A

The tilt mechanism in the above-described conventional projection apparatus has a release button, and this release button needs to be arranged at a place where the user can visually recognize it, such as the front surface of the housing. Installation of such a release button is a significant design constraint and may affect the layout of other devices and the appearance of the device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection apparatus having a tilt mechanism capable of increasing the degree of freedom in design.

A projection device according to the present invention includes: a housing; a rail member provided inside the housing and having a first engaging portion ; a leg member provided on a slide member that slides vertically with respect to the housing by being guided by the guide portion, the leg member including a second engaging portion that engages with the first engaging portion; wherein the slide member and the leg member have a long hole on one side and a swing shaft that engages with the long hole on the other side so that the leg member is swingably provided on the slide member device .

According to the present invention, it is possible to provide a projection device having a tilt mechanism that can expand the degree of freedom in design.

1 shows an external view of a projection apparatus having a tilt mechanism according to a first embodiment of the present invention, with a part of the casing being shown in cross section, showing the tilt mechanism, (a) being a left side view, and (b) being a left side view; It is a front view. BRIEF DESCRIPTION OF THE DRAWINGS The tilt mechanism of the projection apparatus which concerns on 1st Embodiment of this invention is shown, (a) is the figure seen from the rear surface, (b) is a left side view. 3 is an exploded perspective view of a tilt mechanism of the projection device according to the first embodiment of the invention; FIG. FIG. 3A is a cross-sectional view corresponding to the IV-IV cross section of FIG. 2 for explaining the operation of the tilt mechanism of the projection device according to the first embodiment of the present invention, and FIG. , and (b) is a diagram of a state in which the projections and recesses are engaged. FIG. 4A is a cross-sectional view of a principal part showing only the rail member in cross section for explaining the operation of the tilt mechanism of the projection device according to the first embodiment of the present invention, and FIG. (b) is a diagram of a state in which the concave-convex engagement is released. The tilt mechanism of the projection apparatus concerning 2nd Embodiment of this invention is shown, (a) is the figure seen from the rear surface, (b) is a left side view. FIG. 8A is a perspective view showing a tilt mechanism of a projection apparatus according to a second embodiment of the present invention, where (a) shows a state in which an auxiliary member is housed, and (b) shows a state in which the auxiliary member is used; . FIG. 11 is a schematic diagram showing a tilt mechanism of a projection device according to a third embodiment of the present invention; FIG. 5 is a list for explaining modifications of the concave-convex engagement according to the first to third embodiments of the present invention; FIG.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. FIGS. 1A and 1B show how the projection device 10 having the tilt mechanism 50 is installed on an installation surface DT such as a desk with the installation angle adjusted. The projection device 10 includes a housing 20 and can project an image on a screen or the like by emitting projection light from a projection port 11 provided on the front surface 21 of the housing 20 . In the following description, left and right in the projection device 10 refer to the left and right direction with respect to the projection direction from the projection aperture 11, and front and rear refer to the front and rear direction with respect to the traveling direction of the projection light of the projection device 10. show.

The housing 20 has a substantially box-like shape and includes a front surface 21 , a rear surface 22 , a left side surface 23 , a right side surface 24 , an upper surface 25 and a lower surface 26 . A tilt mechanism 50 is provided inside the front side of the housing 20 at a substantially center portion in the left-right direction. The tilt mechanism 50 has a leg member 51 that can protrude from the lower surface 26 of the housing 20 . 1(a) and 1(b) show a state in which the leg member 51 protrudes. 2(a) and 2(b) show a state in which the leg member 51 is retracted. 1A and 1B, rubber legs 30 are fixedly provided on the left and right sides respectively behind the lower surface 26 of the housing 20 shown in FIGS. 1(a) and 1(b). in contact with 1A and 1B show the tilt mechanism 50 with a part of the housing 20 broken away, but the internal structure of the projection device 10 other than the tilt mechanism 50 is omitted.

The tilt mechanism 50 will be described with reference to FIG. 3 and also to FIGS. 2(a) and 2(b). The tilt mechanism 50 includes leg members 51 , rail members 52 , slide members 53 and coil springs 54 . The leg member 51 is formed in a substantially prismatic rod shape that is elongated in the vertical direction and has a horizontal cross section that is elongated in the horizontal direction. The lower surface of the installation member 51a serves as an installation surface contact portion 51a1 that contacts the installation surface DT. The leg member 51 is provided with a convex second engaging portion 62 (one convex portion) so as to protrude from the front surface 51b1 in the vicinity of the upper end. The second engaging portion 62 has a triangular right isosceles triangular shape when viewed from the side.

The leg member 51 is provided with swing shafts 51c on the left and right side surfaces (the left side surface 51b3 and the right side surface 51b4) in the vicinity of the upper end. The swing shaft 51c protrudes from the left side surface 51b3 and the right side surface 51b4, and is formed in a substantially cylindrical shape with a spherical tip. A cylindrical spring support shaft 51d on which the coil spring 54 is arranged protrudes from a rear surface 51b2 near the upper end of the leg member 51. As shown in FIG.

The rail member 52 is formed in the shape of a substantially square tube that is elongated in the vertical direction, and has a flat mounting portion 52a that protrudes in the horizontal direction at the lower end thereof. The tilt mechanism 50 is fixed to the bottom plate provided with the lower surface 26 of the housing 20 by screws or the like at the mounting portions 52 a of the rail members 52 . On the front sides of the left and right side surfaces (left side surface 52b3 and right side surface 52b4) of the rail member 52, vertically long side plates 52d are provided so as to connect to the front plate 52g and stand from the mounting portion 52a. At each corner where the left side surface 52b3, the right side surface 52b4, and the rear surface 52b2 intersect, a vertically elongated prism-shaped columnar portion 52c is provided so as to stand from the mounting portion 52a. As shown in the enclosing view showing the QQ section of FIG. 3, the left side 52b3 and the right side 52b4 of the rail member 52 are formed between the rear surface 52d1 of the side plate 52d and the front surface 52c1 of the columnar portion 52c. A portion is provided as a first guide portion 71 . The lower end of the first guide portion 71 reaches the attachment portion 52a and is connected to an insertion opening 52a1 (described later) of the attachment portion 52a.

The upper end of the columnar portion 52c is connected to the upper end of the side plate 52d via a prismatic beam portion 52e. Further, as shown in the enclosing view showing the QQ cross section of FIG. A portion formed between the portion 52c and the side surface 52c2 is provided as a second guide portion 72. As shown in FIG. Thus, the guide portion 70 (the first guide portion 71 and the second guide portion 72) of the rail member 52 is provided. Moreover, the upper ends of the left and right columnar portions 52c are connected by a prismatic connecting portion 52f. An upper surface 52b5 of the rail member 52 is surrounded by a front plate 52g having a front surface 52b1, a beam portion 52e and a connecting portion 52f, and has a rectangular opening as an opening portion 52h. The lower surface 52b6 of the rail member 52 (that is, the lower surface of the mounting portion 52a) has a substantially T-shaped insertion opening 52a1 that communicates with the internal space of the rail member 52 . More specifically, part of the rear surface 52d1 of the left and right side plates 52d extends to the insertion opening 52a1. A rear introduction surface 52a11, which is an inner surface (edge surface) on the rear side of the insertion port 52a1, is continuous with the front surface 52c1 of the columnar portion 52c.

As shown in FIGS. 2A and 2B, a first engaging portion 61 is provided on the rear surface side of the front plate 52g including the front surface 52b1 of the rail member 52. As shown in FIG. As shown in detail in FIGS. 5(a) and 5(b), the first engaging portion 61 has a plurality of convex portions 61a each having a triangular shape (isosceles right triangle) in a side view continuously in the vertical direction. By arranging, a plurality of concave portions 61b formed by one convex portion 61a of the plurality of convex portions 61a and another convex portion 61a adjacent to the one convex portion 61a are continuously arranged in the vertical direction. be. Thereby, the convex portions 61a and the concave portions 61b are arranged alternately in the vertical direction. Each triangular convex portion 61a of the first engaging portion 61 has a lower surface 61a1 perpendicular to the front surface 52b1 of the rail member 52, and the upper surface 61a2 is inclined with respect to the front surface 52b1.

Returning to FIG. 3, the slide member 53 is formed in a substantially block shape having an inner space and an open front surface and a lower surface. A rear side plate 53d, which is a side plate, is provided. The front side plate 53c and the rear side plate 53d extend downward from the left and right ends of the upper plate 53a. The lateral width of the upper plate 53a to which the rear plate 53d connects is formed to be wider than the lateral width of the upper plate 53a to which the front plate 53c connects. The rear plate 53b extends downward from the rear end of the upper plate 53a. The lateral width of the rear plate 53b is substantially the same as the lateral width of the upper plate 53a to which the front plate 53c is connected. The rear side plates 53d facing each other are inclined in an inverted V shape when viewed from the front side so that the distance between them widens downward. The rear side plate 53d has elastic force in the left-right direction. The opposed front side plates 53c are provided with vertical plate-like restricting protrusions 53c1 directed from the lower ends of the front edge surfaces thereof. Further, the front side plate 53c is provided with a shaft hole 53c2 formed as an elongated through hole in the front-rear direction. As shown in the enclosed view of the slide member 53 viewed from the direction P in FIG. 3, the rear plate 53b is provided with a spring support shaft 53b1 protruding from the front surface of the rear plate 53b. A substantially U-shaped spring bearing 53b2 is provided around the spring support shaft 53b1. Inclined ribs 53b3 whose height gradually increases downward are provided on both left and right edges of the rear surface of the rear plate 53b.

The slide member 53 can be assembled by setting the leg member 51 and the coil spring 54 on the slide member 53 in advance and inserting it through the insertion opening 52 a 1 of the rail member 52 . At this time, the opposing rear plate 53d of the slide member 53 temporarily contracts in the lateral width direction at the insertion opening 52a1, and when the rear plate 53d is positioned in the first guide portion 71, the opposing rear plate 53d in the lateral width direction is restored. The width of the rear side plate 53d of the slide member 53 in the front-rear direction is slightly smaller than the width of the first guide portion 71 (between the portion formed by the front surface 52c1 of the columnar portion 52c and the rear surface 52d1 of the side plate 52d). Therefore, the rear side plate 53 d of the slide member 53 is arranged inside the first guide portion 71 . Specifically, the rear plate 53d of the slide member 53 is arranged so as to enter the inner side of the first guide portion 71 due to the lateral repulsive force of the rear plate 53d. As a result, the slide member 53 is guided vertically by the first guide portion 71 of the guide portion 70 . Similarly, the width formed between the outer side surfaces of the two inclined ribs 53b3 provided on the rear plate 53b of the slide member 53 is the width of the second guide portion 72 (the width formed between the opposing side surfaces 52c2 of the columnar portion 52c). slightly smaller than Therefore, two inclined ribs 53 b 3 provided on the rear plate 53 b of the slide member 53 are arranged inside the second guide portion 72 . As a result, the slide member 53 is guided vertically by the second guide portion 72 of the guide portion 70 . In this manner, the slide member 53 is guided vertically by the guide portion 70 .

Further, the pivot shaft 51c of the leg member 51 is engaged with and supported by the shaft hole 53c2 of the slide member 53 (see FIGS. 5(a) and 5(b)). A coil spring 54 is provided between the spring support shaft 51d of the leg member 51 and the spring support shaft 53b1 of the slide member 53 so as to wind the spring support shafts 51d and 53b1 (Fig. 4(a), Fig. 4( b) see). The leg member 51 is urged forward by the coil spring 54 . In other words, the leg member 51 is urged by the coil spring 54, which is the biasing means, in the engaging direction in which the first engaging portion 61 and the second engaging portion 62 are engaged with each other as shown as the concave-convex engagement 60. . On the other hand, the upward movement of the slide member 53 is restricted when the lower surface of the beam-shaped portion 52e of the rail member 52 contacts the upper surface of the upper plate 53a of the slide member 53. As shown in FIG. The downward movement of the slide member 53 is restricted by contact between the lower surface of the rear plate 53d and the lower surface of the inclined rib 53b3 of the rear plate 53b and the upper surface of the mounting portion 52a.

In the engaged state of the leg member 51 shown in FIG. 4(a) and FIG. 5(a), the leg member 51 is biased forward by the coil spring 54, so that the swing axis of the leg member 51 51 c is located at the front end of the shaft hole 53 c 2 of the slide member 53 . At this time, the second engaging portion 62 is positioned in the concave portion 61 b of the first engaging portion 61 to form the uneven engagement 60 . In this state, when the projection device 10 is installed on the installation surface DT and the installation surface contact portion 51a1 of the leg member 51 receives a reaction force from the installation surface DT, the upper surface 62a of the second engaging portion 62 and the first engaging portion 62 are brought into contact with each other. The projection device 10 (housing 20 ) is supported by the leg member 51 with the lower surface 61 a 1 of the projection 61 a of the joining portion 61 abutting thereon.

In order to release the engaged state of the leg member 51 shown in FIG. 4A and the leg member 51 shown in FIG. The lower end of the leg member 51 is pushed backward against the biasing force. Then, as shown in FIG. 4B and FIG. 5B, the leg member 51 swings rearward about the swing shaft 51c, and the swing shaft 51c moves toward the shaft hole. Move to the rear end of 53c2. Then, the second engaging portion 62 is released from the recess 61b of the first engaging portion 61, and the engaged state between the first engaging portion 61 and the second engaging portion 62 is released. If the leg member 51 is moved vertically while maintaining the disengaged state between the first engaging portion 61 and the second engaging portion 62, the leg member 51 is removed from the rail member 52 (housing 20). You can make it appear. Then, when the leg member 51 is released within the vertical movable range of the leg member 51, the engaged state shown in FIG. 4(a) and FIG. 5(a) is restored. Since the convex portion 61a, the concave portion 61b, and the second engaging portion 62 of the first engaging portion 61 are formed in a triangular shape, when the leg member 51 is released, the first engaging portion 61 which is inclined and opposed The upper surface 61a2 of the convex portion 61a of the portion 61 and the lower surface 62b of the second engaging portion 62 can automatically return to the engaged state.

Thus, the first engaging portion 61 and the second engaging portion 62 can be released from the uneven engagement by the operation of pushing the leg member 51 rearward. Since the amount of protrusion of the leg member 51 from the bottom surface 26 of the housing 20 is adjusted, the inclination angle (projection angle) of the projection device 10 can be adjusted. The leg member 51 can be protruded from the rail member 52 by pulling out the leg member 51 even in the engaged state. In this case, the upper surface 61a2 of the convex portion 61a of the inclined first engaging portion 61 and the lower surface 62b of the second engaging portion 62 are in sliding contact, and the second engaging portion 62 sequentially climbs over the convex portion 61a.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 6(a), 6(b), 7(a) and 7(b). A tilt mechanism 50A according to the present embodiment includes a leg member 51A provided with an auxiliary member 510 for extending the length of the leg member 51A instead of the leg member 51 of the first embodiment. The tilt mechanism 50A of this embodiment has the same structure as the tilt mechanism 50 (rail member 52, slide member 53, coil spring 54) of the first embodiment except for the leg member 51A. The leg member 51A, the rail member 52, and the slide member 53 of the embodiment are set to have a large width dimension in the left-right direction. In the following description, the same parts and members as those of the first embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

The auxiliary member 510 is made of a linear member such as a substantially U-shaped metal wire. Both ends of the auxiliary member 510 are bent so as to be substantially horizontal in the left-right direction to form a shaft portion 511 . A bearing portion 520 that supports the shaft portion 511 is provided on the leg member 51A. The rear surface 51b2 of the leg member 51A is provided with a substantially inverted U-shaped concave portion 521 in which the auxiliary member 510 can be accommodated. Holding portions 522 for sandwiching and holding the auxiliary member 510 when the auxiliary member 510 is used are provided at the left and right distal ends of the concave portion 521 . The holding portion 522 is formed to have a narrow width in communication with the concave portion 521 . On the other hand, a holding portion 523 is provided in the upper portion of the concave portion 521 so as to sandwich and hold the tip portion of the auxiliary member 510 when the auxiliary member 510 is not in use (stored). Moreover, the installation member 51a provided at the lower end of the leg member 51A is detachable. The configuration of the upper side of the leg member 51A (the second engaging portion 62, the swing shaft 51c, and the spring support shaft 51d) is the same as the leg member 51 of the first embodiment.

51 A of leg members of this embodiment can also be made to appear and disappear from the rail member 52 (housing 20) like the leg member 51 of 1st Embodiment. As shown in FIG. 7A, by protruding the leg member 51A, the tilt mechanism 50A can be used even when the auxiliary member 510 is housed in the recess 521. As shown in FIG. When the auxiliary member 510 is used, after the leg member 51A is protruded, the installation member 51a is removed and the auxiliary member 510 is rotated around the shaft portion 511. As shown in FIG. At this time, the leg member 51A is projected to a position where the rotating auxiliary member 510 and the rail member 52 do not interfere. Then, as shown in FIG. 7(b), the rotated auxiliary member 510 can be used by being fitted into and locked to the holding portion 522. As shown in FIG.

(Third embodiment)
Next, a third embodiment will be described based on FIG. The tilting mechanism 50B according to the third embodiment is similar to the tilting mechanism 50 according to the first embodiment, the first engaging portion 61 having the plurality of convex portions 61a and the concave portions 61b and the convex second engaging portion 62 (one The first engaging portion 61B has one convex portion 610 in which the relation of concave-convex engagement is reversed, and the second engaging portion 61B has a plurality of convex portions 621 and a plurality of concave portions 622 formed therebetween. This is the engaging portion 62B. Other configurations are the same as the tilt mechanism 50 of the first embodiment. Therefore, the same parts and members as those of the first embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted. Note that FIG. 8 schematically shows the tilt mechanism 50B.

The leg member 51B of the present embodiment can also be operated to appear and retract in the same manner as the leg member 51 of the first embodiment. Here, both the convex portion 610 and the convex portion 621 are formed in a substantially quadrangular prism shape. In the engaged state of the first engaging portion 61B and the second engaging portion 62B, the convex portion 610 of the first engaging portion 61B is engaged with the concave portion 622 of the second engaging portion 62B, and the lower surface of the convex portion 610 611 and the upper surface 621a of the convex portion 621 are in contact with each other. Also in the tilt mechanism 50B, the engagement state between the first engagement portion 61B and the second engagement portion 62B can be released by the rearward swinging operation of the leg member 51B. The slide member 53 is vertically guided by a guide portion 70 (not shown) as in the first embodiment.

The depths of the plurality of recesses 622 of the second engaging portion 62B are formed so as to become deeper the farther from the swing shaft 51c (the swing fulcrum that is the axis of the swing shaft 51c). In other words, the height of the convex portion 621 is formed so as to increase with increasing distance from the swing fulcrum. As a result, regardless of the vertical position of the leg member 51B, the leg member 51B when the uneven engagement 60 between the first engaging portion 61B and the second engaging portion 62B is released (the leg member 51B indicated by the two-dot chain line). are substantially the same. That is, the position at which the concave-convex engagement between the first engaging portion 61B and the second engaging portion 62B is released is approximately on the straight line PR indicated by the two-dot chain line, regardless of the convex portion 621. . Therefore, regardless of the position of the leg member 51B in the vertical direction, the retracting operation of the leg member 51B can be performed with the same operational feeling. For example, when the leg member 51B is retracted, the engagement between the first engaging portion 61B and the second engaging portion 62B is released, and the leg member 51B is protruded while maintaining the swinging angle of the leg member 51B at that time. be able to.

Although the embodiments of the present invention have been described above, the present invention can be implemented with various modifications regardless of the embodiments. For example, the concave-convex engagement 60 of the first engaging portions 61, 61B and the second engaging portions 62, 62B can adopt various shapes as shown in FIG. The concave-convex engagement 60a has an isosceles triangle shape when viewed from the side, the concave-convex engagement 60b has an arc shape when viewed from the side, the concave-convex engagement 60c has a trapezoidal shape when viewed from the side, and the concave-convex engagement 60d has a long rectangular shape when viewed from the side.

Further, the guide portion 70 and the first engaging portion 61 of the rail member 52 may be provided directly inside the housing 20 , that is, integrally with the housing 20 . Further, the operation for moving the leg member 51 is a rearward swinging operation, but it may be a frontward swinging operation.

As described above, according to the embodiment of the present invention, the projection device 10 includes the housing 20, the rail member 52 provided inside the housing 20 and having the first engaging portions 61 and 61B, and the rail member 52 provided inside the rail member 52. Leg members 51 and 51A provided with second engaging portions 62 and 62B which are swingably provided on the mounted slide member 53 and engage with the first engaging portions 61 and 61B by means of uneven engagements 60 and 60a to 60d. , 51B.

As a result, the leg members 51, 51A, 51B can be retracted from the housing 20 without providing a separate button switch or the like, thereby reducing restrictions on the arrangement of the tilt mechanisms 50, 50A, 50B in the projection device 10. Therefore, it is possible to provide the projection device 10 having the tilt mechanisms 50, 50A, and 50B that can expand the degree of freedom in design.

The slide member 53 slides vertically with respect to the housing 20 by being guided by the first guide portions 71 of the guide portions 70 provided on the left and right side surfaces 52b3 and 52b4 of the rail member 52, respectively. Thereby, the leg members 51, 51A, and 51B can be smoothly projected and retracted from the housing 20. As shown in FIG.

In addition, the leg members 51, 51A, 51B are biased by a coil spring 54, which is biasing means, in the engaging direction in which the first engaging portions 61, 61B and the second engaging portions 62, 62B are engaged in concave-convex engagement. . Various urging means such as an elastic member such as rubber can be used instead of the coil spring 54 . As a result, the leg members 51, 51A, 51B can be swung to release the uneven engagement 60, and the uneven engagement 60 can be automatically restored only by releasing the hand.

Further, the slide member 53 and the leg members 51, 51A, 51B are provided with a shaft hole 53c2 as an elongated hole in the slide member 53, and engage with the shaft hole 53c2 in the other leg members 51, 51A, 51B. The leg members 51, 51A, and 51B are provided on the slide member 53 so as to be swingable by providing the swing shaft 51c. As a result, the uneven engagement can be released without increasing the swing angle of the leg members 51, 51A, 51B or increasing the interval between the protrusions 61a (that is, the size of the recesses 61b). , you can get an appropriate feeling of operation. The slide member 53 may be provided with a pivot shaft, and the leg members 51, 51A and 51B may be provided with elongated holes.

In addition, the first engaging portion 61 has a plurality of convex portions 61a continuously arranged in the vertical direction, so that one convex portion 61a of the plurality of convex portions 61a and another convex portion 61a adjacent to the one convex portion 61a are arranged. A plurality of concave portions 61b formed by the convex portions 61a are arranged continuously in the vertical direction, and the second engaging portion 62 is arranged with one convex portion. This allows the leg members 51 and 51A to protrude from the housing 20 in multiple steps, so that the projection angle can be adjusted according to the environment in which the projection device 10 is installed.

In addition, the first engaging portion 61B is provided with one convex portion 610, and the second engaging portion 62B is provided with a plurality of concave portions 622 provided between a plurality of convex portions 621 and separated from the swing fulcrum. The depth of the concave portion 622 increases as the depth increases. As a result, the projection angle can be adjusted according to the environment in which the projection device 10 is installed. , the engagement between the first engaging portion 61B and the second engaging portion 62B is released, and the leg member 51B can be retracted.

The leg member 51A also includes an auxiliary member 510 that extends the length of the leg member 51A. As a result, even a smaller projection device 10 can project at a large projection angle.

Further, the concave-convex engagement of the first engaging portions 61, 61B and the second engaging portions 62, 62B is released by the operation of pushing the leg members 51, 51A, 51B rearward. Accordingly, the leg members 51, 51A, and 51B can be intuitively operated, and the projection device 10 provided with the tilt mechanisms 50, 50A, and 50B with good operational feeling can be provided.

The first guide portion 71 of the guide portion 70 is formed between the front surface 52c1 of the columnar portion 52c of the rail member 52 and the rear surface 52d1 of the side plate 52d of the rail member 52. The slide member 53 is guided by the first guide portion 71 by arranging the rear side plates 53d, which are side plates provided on the left and right side surfaces of the slide member 53, inside the slide member 53 respectively. As a result, it is possible to provide a guide configuration with a simple structure and reduced backlash.

It should be noted that the embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and its equivalents.

Below, the invention described in the first claim of the present application is added.
[1] a housing;
a rail member provided inside the housing and having a first engaging portion;
a leg member provided swingably on a slide member provided inside the rail member and including a second engaging portion that engages with the first engaging portion in an uneven manner;
a projection device.
[2] The projection device according to [1], wherein the slide member slides vertically with respect to the housing by being guided by guide portions provided on left and right side surfaces of the rail member.
[3] The leg member according to [1] or [2], wherein the leg member is biased by biasing means in an engaging direction in which the first engaging portion and the second engaging portion are engaged in concave-convex engagement. projection device.
[4] The slide member and the leg member are provided with a long hole on one side and a swing shaft that engages with the long hole on the other side, so that the leg member is swingably provided on the slide member. The projection device according to any one of [1] to [3].
[5] The first engaging portion is provided with a plurality of concave portions,
The second engaging portion is provided with one convex portion,
The projection device according to any one of [1] to [4].
[6] The first engaging portion is provided with one convex portion,
The second engaging portion is provided with a plurality of recesses, and the depth of the recesses increases as the distance from the swing fulcrum increases.
The projection device according to any one of [1] to [4].
[7] The projection device according to any one of [1] to [6], wherein the leg member includes an auxiliary member for extending the length of the leg member.
[8] The projection device according to any one of [1] to [7], wherein the first engaging portion and the second engaging portion are released from the concave-convex engagement by an operation of pushing the leg member backward. .
[9] The guide portion is formed between the front surface of the columnar portion of the rail member and the rear surface of the side plate of the rail member,
According to any one of [1] to [8], the slide member is guided by the guide portion by arranging side plates provided on left and right side surfaces of the slide member inside the guide portion. projection device.

10 projection device 11 projection port 20 housing 21 front surface 22 rear surface 23 left side surface 24 right side surface 25 upper surface 26 lower surface 30 rubber legs 50, 50A, 50B tilt mechanism 51, 51A, 51B leg member 51a installation member 51a1 installation surface contact portion 51b1 Front surface 51b2 Rear surface 51b3 Left side surface 51b4 Right side surface 51c Swing shaft 51d Spring support shaft 52 Rail member 52a Mounting portion 52a1 Insertion opening 52a11 Rear introduction surface 52b1 Front surface 52b2 Rear surface 52b3 Left side surface 52b4 Right side surface 52b5 Upper surface 52b6 Lower surface 52c Columnar portion 52c1 Front surface 52c2 Side surface 52d Side plate 52d1 Rear surface 52e Beam-like portion 52f Connection portion 52g Front plate 52h Opening 53 Slide member 53a Upper plate 53b Rear plate 53b1 Spring support shaft 53b2 Spring receiver 53b3 Inclined rib 53c Front plate 53c1 Regulating projection 53c2 Shaft hole 53d Rear plate 54 Coil springs 60, 60a to 60d Concavo-convex engagements 61, 61B First engaging portion 61a Protruding portion 61a1 Lower surface 61a2 Upper surface 61b Concave portions 62, 62B Second engaging portion 62a Upper surface 62b Lower surface 70 Guide portion 71 First guide portion 72 Second guide Part 510 Auxiliary member 511 Shaft part 520 Bearing part 521 Concave part 522 Holding part 523 Holding part 610 Convex part 611 Lower surface 621 Convex part 621a Upper surface 622 Concave part DT Installation surface

Claims (7)

a housing;
a rail member provided inside the housing and having a first engaging portion;
The slide member is provided inside the rail member and slides vertically with respect to the housing by being guided by guide portions provided on the left and right side surfaces of the rail member. a leg member including a second engaging portion that engages with the engaging portion;
has
A projection apparatus according to claim 1, wherein one of said slide member and said leg member is provided with a long hole and the other of said slide member and said leg member is provided with a swing shaft engaging with said long hole, whereby said leg member is provided swingably on said slide member . The guide portion is formed between the front surface of the columnar portion of the rail member and the rear surface of the side plate of the rail member,
2. The projection device according to claim 1 , wherein the slide member is guided by the guide portion by arranging side plates provided on left and right side surfaces of the slide member inside the guide portion. 2. The projection device according to claim 1, wherein the leg member is biased by biasing means in an engaging direction in which the first engaging portion and the second engaging portion are engaged. The first engaging portion is provided with a plurality of concave portions,
The second engaging portion is provided with one convex portion,
The projection device according to any one of claims 1 to 3 . The first engaging portion is provided with one convex portion,
The second engaging portion is provided with a plurality of recesses, and the depth of the recesses increases as the distance from the swing fulcrum increases.
The projection device according to any one of claims 1 to 3 . The projection device according to any one of claims 1 to 5 , wherein the leg member includes an auxiliary member for extending the length of the leg member. 7. The projection device according to any one of claims 1 to 6 , wherein the first engaging portion and the second engaging portion are disengaged by an operation of pushing the leg member backward.

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