Electronic device

Abstract

To provide an electronic device provided with a tilt mechanism capable of adjusting an installation angle with an appropriate torque.SOLUTION: A projection device comprises a housing, a rotational shaft 44, an arm 34L that supports the housing by rotating together with the rotational shaft 44, a rotary sleeve SL that rotates together with the rotational shaft 44, and a roller member 42 that follows the rotary sleeve SL while being in contact with an outer peripheral surface of the rotary sleeve SL. When the roller member 42 is in contact with the outer peripheral surface of the rotary sleeve SL, the rotary sleeve SL is allowed to rotate in an opening direction, and by with rotation in a closing direction, a one-way clutch is activated in which the roller member 42 is pressed against the rotary sleeve SL to restrict rotation in the closing direction. When the roller member 42 is separated from the outer peripheral surface of the rotary sleeve SL, the one-way clutch is released to allow rotation in both the opening and closing directions.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to electronic devices. [Background technology]

[0002] Conventionally, electronic devices such as projection devices and display devices have been proposed that are provided with a tilt mechanism for adjusting the installation angle of the housing. For example, Patent Document 1 discloses a screen angle adjustment device for a display device that is provided with a lifting means for lifting and tilting the display device. The lifting means includes a first lift arm and a second lift arm that are rotatably attached around the axis of a support shaft. This screen angle adjustment device is configured such that friction torque is generated when the first lift arm and the second lift arm rotate by adjusting the tightening of a tightening nut attached to the support shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-128088 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if a tilt mechanism that utilizes friction torque, such as the angle adjustment device disclosed in Patent Document 1, is provided, a force greater than the torque required to support the weight of the housing is required when adjusting the installation angle, and there is a risk that excessive force will be generated and the tilt mechanism will be damaged if an attempt is made to forcibly close it.

[0005] An object of the present invention is to provide an electronic device equipped with a tilt mechanism that can adjust the installation angle with an appropriate torque. [Means for solving the problem]

[0006] The electronic device of the present invention comprises a housing, a rotating shaft that rotates around an axis relative to the housing, a support member extending radially from the rotating shaft and rotating together with the rotating shaft to support the housing while the installation angle of the housing is adjusted relative to an installation surface, a first rotating member that is provided around the axis of the rotating shaft and rotates together with the rotating shaft, and a driven member that follows the first rotating member while abutting against the abutment surface of the first rotating member, wherein in a first state in which the driven member abuts against the abutment surface of the first rotating member, the first rotating member is allowed to rotate in a first direction around its axis, and rotates in a second direction around its axis to press the driven member, thereby acting as a one-way clutch that restricts rotation in the second direction, and in a second state in which the driven member is separated from the abutment surface of the first rotating member, the one-way clutch is released and rotation in the first direction and the second direction is allowed. Effect of the Invention

[0007] According to the present invention, it is possible to provide an electronic device equipped with a tilt mechanism capable of adjusting the installation angle with an appropriate torque. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a projection device according to an embodiment, seen from the lower front side. [Diagram 2] FIG. 2 is an exploded perspective view of a tilt mechanism of the projection device according to the embodiment, as viewed from below. [Diagram 3] 1 is an exploded perspective view of a left rotation mechanism in a projection device according to an embodiment, seen from above. FIG. [Figure 4] FIG. 1A is a perspective view of a base member of a projection device according to an embodiment, and FIG. [Diagram 5] FIG. 2A is a perspective view of a holding member of a projection device according to an embodiment, and FIG. 2B is a plan view of the holding member. [Figure 6] FIG. 2A is a perspective view of one of the rotation mechanisms in the projection device according to the embodiment, and FIG. 2B is a top view of the one of the rotation mechanisms. [Figure 7] 7 is a cross-sectional view of one of the rotation mechanisms in the projection device according to the embodiment, taken along line VII-VII in FIG. 6(a). [Figure 8] 1A is a side view of one arm and one rotation mechanism in a closed state as viewed from the inside in the axial direction, and FIG. 1B is an enlarged side view of a main part of the rotation mechanism surrounded by a dashed line in FIG. [Figure 9] 1A is a side view of one arm and one rotation mechanism viewed from the inside in the axial direction when the arm has been rotated in the open direction from the closed state by a predetermined rotation angle, and FIG. 1B is an enlarged side view of the main part of the rotation mechanism surrounded by dashed lines in FIG. [Figure 10] 1A is a side view of one arm and one rotation mechanism viewed from the inside in the axial direction when the arm has been rotated in the open direction from the closed state by a predetermined rotation angle, and FIG. 1B is an enlarged side view of the main part of the rotation mechanism surrounded by dashed lines in FIG. [Figure 11] 1A is a side view of one arm and one rotation mechanism in an open state as viewed from the inside in the axial direction, and FIG. 1B is an enlarged side view of a main part of the rotation mechanism surrounded by a dashed line in FIG. [Figure 12] 1A is a side view of one arm and one rotation mechanism viewed from the inside in the axial direction when the arm has been rotated from the open state to the closing direction by a predetermined rotation angle, and FIG. 1B is an enlarged side view of the main part of the rotation mechanism surrounded by dashed lines in FIG. [Figure 13] 1A is a side view of one arm and one rotation mechanism viewed from the inside in the axial direction when the arm has been rotated from the open state to the closing direction by a predetermined rotation angle, and FIG. 1B is an enlarged side view of the main part of the rotation mechanism surrounded by dashed lines in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, a projection device (electronic device) 10 according to the embodiment includes a housing 20 having six faces (upper face 20a, lower face 20b, left side face 20c, right side face 20d, front face 20e, and rear face 20f) in a substantially rectangular box shape with the left-right direction as the longitudinal direction. The projection device 10 has a projection port 11 from which projection light is emitted on the front face 20e side. In the following description, the left and right of the projection device 10 refer to the left and right directions with respect to the main emission direction X of the projection light from the projection port 11, and the front and rear refer to the emission direction X of the projection light from the projection device 10 and the opposite direction as the front and rear directions. In addition, the upper surface 20a side is the upper side of the projection device 10, and the lower surface 20b side is the lower side of the projection device 10.

[0010] The housing 20 has an upper case 21 having an upper surface 20a and a part of a right side surface 20d, and a lower case 22 having a lower surface 20b and a part of a right side surface 20d. The housing 20 has a front panel 23 on the front side, a rear panel 24 on the rear side, and a left panel 25 on the left side. The front panel 23 is provided with a projection port opening 23a through which the projection port 11 is exposed, an intake port 23b, and an exhaust port 23c. The left panel 25 is provided with an intake port 25a and a connection port 25b such as a connector for image input / output. In the projection device 10, a tilt mechanism TL for adjusting the installation angle of the housing 20 is provided in the front part of the lower surface 20b of the housing 20.

[0011] As shown in Fig. 1 and Fig. 2, the tilt mechanism TL is configured to include a pair of arms (support members) 34R, 34L, a connection plate 36, and a rotation mechanism 40 for rotating both arms 34R, 34L relative to the housing 20. The connection plate 36 has an elongated shape along the left and right sides of the front surface 20e, and the pair of arms 34R, 34L are attached so as to extend from the left and right ends of the connection plate 36 toward the rear surface 20f, respectively. The front parts of the pair of arms 34R, 34L are rotated downward by the rotation mechanism 40. The pair of arms 34R, 34L and the connection plate 36 support the housing 20 in a state in which the installation angle of the housing 20 is adjusted with respect to the installation surface IS (see Fig. 8) on which the projection device 10 is installed.

[0012] In the tilt mechanism TL, the projection device 10 can project at any installation angle (elevation angle) within a range between a state in which the pair of arms 34R, 34L are closed relative to the bottom surface 20b of the housing 20, in other words, a state in which the pair of arms 34R, 34L form an angle of 0° relative to the bottom surface 20b of the housing 20 (a state shown by solid lines in FIG. 1, hereinafter referred to as the "closed state"), and a state in which the pair of arms 34R, 34L are open so as to hang down at an angle of approximately 90° relative to the bottom surface 20b of the housing 20 (a state shown by dashed lines in FIG. 1, hereinafter referred to as the "open state"). Below, the shape, connection direction, etc. of each member constituting the tilt mechanism TL will be described based on the closed state.

[0013] The pair of arms 34R, 34L and the pair of rotation mechanisms 40 are provided on both left and right ends of the lower surface 20b of the housing 20 (both end edge sides constituting the opposite sides of the housing 20). The connection plate 36 connects the pair of arms 34R, 34L and abuts against the installation surface IS (see FIG. 8) according to the above-mentioned installation angle. The pair of arms 34R, 34L are symmetrical in shape and are sheet metal members having first arm plates 34R1, 34L1 and second arm plates 34R2, 34L2, respectively. The first arm plates 34R1, 34L1 are plate-shaped with both plate surfaces facing left and right and the width in the up-down direction increases toward the rear side.

[0014] As shown in Fig. 3, the base end (rear end) of the first arm plate 34L1 of the left arm 34L is provided with a pivot hole 34L1a through which a mounting screw 41 of a rotation mechanism 40 (described later) is inserted and pivotally supported, and a locking recess 34L1b into which one end SPa of a coil spring SP (described later) is locked. The open end of the pivot hole 34L1a is provided in a substantially rectangular shape with both upper and lower sides formed in an arc shape and both left and right sides formed in a straight line. Although not shown, a pivot hole and a locking recess are also provided in the first arm plate 34R1 of the right arm 34R.

[0015] The second arm plates 34R2, 34L2 of the arms 34R, 34L are plate-shaped, and are provided in a portion of the arms 34R, 34L except for the rear end portion thereof with the plate surface parallel to the lower surface 20b of the housing 20 (approximately perpendicular to the plate surface of the first arm plates 34R1, 34L1). The lower surface 20b of the housing 20 is provided with a first arm housing groove 26a in which the first arm plates 34R1, 34L1 of the arms 34R, 34L are housed in the closed state. The front side of the first arm housing groove 26a is provided with a second arm housing groove 26b, which is a shallow recess that opens downward and in which the second arm plates 34R2, 34L2 of the arms 34R, 34L are housed.

[0016] The connection plate 36 is a substantially rectangular sheet metal member that matches the dimension of the long side direction of the housing 20. Both ends of the connection plate 36 in the long side direction are connected to the front ends of the arms 34R, 34L by screw members 35, and connect the arms 34R, 34L. In a closed state in which the pair of arms 34R, 34L are accommodated in the first arm accommodation groove 26a and the second arm accommodation groove 26b, the upper surface of the connection plate 36 abuts against the lower surface 20b of the housing 20, and the lower surface of the connection plate 36 protrudes downward from the lower surface 20b of the housing 20 (see FIG. 1). For this reason, a pair of installation members 50 made of a rubber material or the like are provided on the rear part of the lower surface 20b of the housing 20 in order to adjust the height so that the housing 20 is placed flat in a horizontal position when the lower surface 20b of the housing 20 is placed flat with the lower surface 20b facing downward in the closed state.

[0017] Next, a pair of rotation mechanisms 40 for rotating the arms 34R, 34L relative to the lower surface 20b of the housing 20 will be described in detail. Each member of the pair of rotation mechanisms 40 has a symmetrical shape and configuration, and the following describes the rotation mechanism 40 provided on the left side of the lower surface 20b of the housing 20. On the lower surface 20b of the housing 20, a mounting portion 27 is provided on the rear side of each first arm housing groove 26a, to which each rotation mechanism 40 is attached to the lower surface 20b of the housing 20. Each mounting portion 27 is composed of a housing recess 27a provided in a manner continuing from the first arm housing groove 26a and housing the rotation mechanism 40, and a mounting surface 27b provided in a manner continuing from the lower surface 20b of the housing 20 and to which the rotation mechanism 40 is attached. The mounting surface 27b is provided with two screw holes 27b1 to which the base member 46 of the rotation mechanism 40 is screwed. Although there are two screw holes 27b1 and two screws attached to the screw holes 27b1, at least one each is sufficient.

[0018] 3, the rotation mechanism 40 includes a mounting screw 41, a roller member (driven member) 42, a holding member 43, a rotating shaft 44, a coil spring (coil spring member) SP, a base member 46, a rotating sleeve (first rotating member) SL, a rotating washer (second rotating member) 48, a first washer W1, a second washer W2, a third washer W3, and a tightening nut 49. Although details will be described later, the rotation mechanism 40 is configured so that a torque limiter is activated when a torque (rotational torque) equal to or greater than a predetermined torque is generated around the axis of the rotating shaft 44, and the rotation mechanism 40 transitions between a state in which a one-way clutch that restricts rotation in the rotation direction is activated, in which the pair of arms 34R, 34L are in a closed state in a state in which they are open relative to the lower surface 20b of the housing 20, and a state in which the one-way clutch is released and does not act.

[0019] The mounting screw 41 is a screw-like member, and is inserted from the outside into the shaft support hole portion 34L1a of each arm 34R, 34L. The roller member 42 is a substantially columnar or hollow cylindrical member, and is disposed with the axial direction of the column or cylinder facing the left-right direction. The holding member 43 is an elastic member that holds the roller member 42 rotatably around its axis, and is provided by bending a metal leaf spring. The configuration of the holding member 43 will be described in detail later. The coil spring SP is assembled around the axis of the rotating shaft 44, and one end SPa of the coil spring SP is engaged with the engaging recess 34L1b of the arm 34L, so that the other end SPb of the coil spring SP is brought into contact with the lower surface 20b of the housing 20 as the arm 34L rotates. When one end of the coil spring SP is engaged with the engagement recess 34L1b and the other end SPb is in contact with the lower surface 20b of the housing 20, the arm 34L is biased in a direction to close against the lower surface 20b of the housing 20 by the coil spring SP.

[0020] The rotating shaft 44 is a shaft-shaped member and is arranged rotatably relative to the housing 20 in a position in which the axial direction coincides with the left-right direction. The rotating shaft 44 has a large diameter portion 44a provided on the outside in the axial direction, a small diameter portion 44b provided inside the large diameter portion 44a in the axial direction and having a smaller diameter than the large diameter portion 44a, a held portion 44c provided between the large diameter portion 44a and the small diameter portion 44b and having a smaller diameter than the large diameter portion 44a and a larger diameter than the small diameter portion 44b, and a protruding portion 44d that protrudes slightly outward from the outer surface of the large diameter portion 44a in the axial direction. The end of the rotating shaft 44 on the large diameter portion 44a side is connected to the arms 34R and 34L. In other words, the arms 34R and 34L extend from the rotating shaft 44 in the radial direction.

[0021] The outer diameter of the large diameter portion 44a is set to be slightly smaller than the inner diameter of the wound portion of the coil spring SP. A part of the small diameter portion 44b is cut out along the axial direction of the rotating shaft 44, and this cut out part results in a flat surface shape that is not a curved surface but a flat surface (hereinafter, the flat surface shape part is referred to as the "flat surface shape part 44b1"). The rotating shaft 44 is provided with a pair of such flat surface shape parts 44b1 at positions facing each other. A screw groove 44G is provided between the pair of flat surface shape parts 44b1 of the rotating shaft 44, that is, on the outer circumferential surface around the shaft where the flat surface shape part 44b1 is not provided. The protruding part 44d is provided with a screw hole 44d1 that opens toward the outside in the axial direction (left direction in FIG. 3) and into which the mounting screw 41 is screwed. The screw hole 44d1 is shaped to have a concave-convex relationship with the tip of the screw 41 so that the screw hole 44d1 and the mounting screw 41 are screwed together via the shaft support hole part 34L1a of the arm 34L. In addition, the protrusion 44d has approximately the same shape as the pivot hole portion 34L1a in the arm 34L so that it is inserted into the pivot hole portion 34L1a in the arm 34L and fixed to the arm 34L, and the outer peripheral size of the protrusion 44d is slightly smaller than the inner peripheral size of the pivot hole portion 34L1a.

[0022] In the following, the outside in the axial direction of the rotating shaft 44 in the rotating mechanism 40 is referred to as the "outside in the axial direction," and the inside in the axial direction of the rotating shaft 44 is referred to as the "inside in the axial direction." That is, in the rotating mechanism 40 provided on the right side of the pair of rotating mechanisms 40, the "outside in the axial direction" refers to the right side, and the "inside in the axial direction" refers to the left side. On the other hand, in the rotating mechanism 40 provided on the left side, the "outside in the axial direction" refers to the left side, and the "inside in the axial direction" refers to the right side. In the following, the axial circumference of the rotating shaft 44 is simply referred to as the "axial circumference."

[0023] The base member 46 is a member for holding the rotating shaft 44 rotatably relative to the lower surface 20b of the housing 20 and for attaching the rotating mechanism 40 to the housing 20. Specifically, the base member 46 holds the held portion 44c of the rotating shaft 44. The rotating sleeve SL is a short cylindrical rubber member having a sleeve through hole SL1, which is a through hole, on the inside, and is provided around the axis of the rotating shaft 44. The sleeve through hole SL1 is inserted into the small diameter portion 44b of the rotating shaft 44, which is not the flat surface portion 44b1. The inner diameter of the sleeve through hole SL1 is approximately equal to the outer diameter of the small diameter portion 44b of the rotating shaft 44, which is not the flat surface portion 44b1. Therefore, the small diameter portion 44b is inserted into the sleeve through hole SL1, and frictional force acts between the rotating sleeve SL and the rotating shaft 44, so that the rotating sleeve SL rotates together with the rotating shaft 44.

[0024] As shown in the enlarged view E1 of FIG. 3, the rotating washer 48 is a washer-shaped member and is disposed axially inward of the base member 46. The rotating washer 48 has a substantially plate-shaped washer plate surface 48a and a raised portion 48b that is raised in a substantially cylindrical shape from the surface of the washer plate surface 48a facing outward in the axial direction. The raised portion 48b is provided so that its outer diameter is substantially equal to the outer diameter of the held portion 44c of the rotating shaft 44. A washer through hole 48c that is a through hole is provided inside the washer plate surface 48a and the raised portion 48b. The washer through hole 48c is provided so that its opening has substantially the same shape as the outer shape of the flat surface portion 44b1 and the screw groove 44G of the rotating shaft 44 and the size of the opening inner circumference is slightly larger than the outer circumference of the flat surface portion 44b1 and the screw groove 44G. Therefore, by inserting the flat surface portion 44b1 of the rotating shaft 44 into the washer through-hole 48c, the rotating washer 48 is fitted onto the rotating shaft 44, and the rotating washer 48 can rotate together with the rotating shaft 44.

[0025] The washer plate surface 48a has a pair of wing portions 48a1, 48a2 extending in a wing shape in the radial direction of the rotating washer 48 (in the radial direction of the rotating shaft 44 when the rotating shaft 44 is inserted through the washer through hole 48c). The pair of wing portions 48a1, 48a2 are provided at positions at an angle of approximately 180° with respect to the center of the rotating washer 48. The first washer W1 and the second washer W2 are both dish-shaped washers (disc spring washers), and the third washer W3 is a flat washer, both of which are disposed on the inside of the rotating washer 48 in the axial direction. The small diameter portion 44b of the rotating shaft 44 is inserted inside the washers W1, W2, and W3. The tightening nut 49 is a nut-shaped member, and is disposed on the inside of the rotating mechanism 40 in the axial direction. The tightening nut 49 is screwed into a thread groove 44G provided in the small diameter portion 44b of the rotating shaft 44. Here, the first washer W1 and the second washer W2 are arranged facing each other and sandwiched between the third washer W3 and the rotating washer 48, and the tightening nut 49 is tightened from the inside to adjust the pressing force in the axial direction of the rotating shaft 44.

[0026] Next, the configuration of the base member 46 will be described in detail with reference to FIG. 4. As shown in FIGS. 4(a) and (b), the base member 46 has a bottom plate 46a with an opening in the center, a pair of side plates 46b rising upward from both the left and right sides of the bottom plate 46a, and a rear end plate 46c rising upward from the rear end of the bottom plate 46a. The bottom plate 46a is provided with two mounting screw holes H1 and H2 arranged in the front-rear direction for screwing the base member 46 to each screw fixing hole 27b1 of the mounting surface 27b of the housing 20. Note that the number of screws attached to the mounting screw holes H1 and H2 and the mounting screw holes H1 and H2 is two each, but at least one is sufficient. The base member 46 is placed in the accommodating recess 27a with the bottom plate 46a facing downward, and is attached to the housing 20 by being positioned so that the mounting screw holes H1, H2 overlap with the respective screw fastening holes 27b1 and screwed from the underside of the housing 20.

[0027] The pair of side plates 46b have substantially the same shape and are spaced apart in the left-right direction. The side plate 46b arranged on the inside in the axial direction among the side plates 46b is provided with a protrusion (engagement portion) 46b1 that protrudes slightly toward the rear side. Each side plate 46b is also provided with a circular cutout portion 46b2 that is cut out in a substantially circular shape that is open to the rear side. The inner diameter of each circular cutout portion 46b2 is slightly larger than the outer diameter of the held portion 44c of the rotating shaft 44 and the outer diameter of the raised portion 48b of the rotating washer 48. The held portion 44c is rotatably held in the circular cutout portion 46b2 arranged on the outside in the axial direction among the circular cutout portions 46b2, and the raised portion 48b is rotatably held in the circular cutout portion 46b2 arranged on the inside in the axial direction.

[0028] At the rear side of the circular cutout 46b2 in each side plate 46b, an arc cutout 46b3 is provided, which is cut out in an approximately arc shape downward from the circular cutout 46b2. At the rear side of each arc cutout 46b3, an inclined portion 46b4 is provided, which is inclined upward toward the rear side from the circular cutout 46b3. Each arc cutout 46b3 and each inclined portion 46b4 are smoothly formed so that the outer circumferential surface 42a of the roller member 42 slides on each arc cutout 46b3 and each inclined portion 46b4 while the roller member 42 rotates. At the approximate center of the rear end plate 46c, a rear end plate opening 46c1 is provided, which opens in an approximately rectangular shape in the front-rear direction. In addition, a small gap 46S is provided in the front-rear direction between the rear end plate 46c and the front end of each side plate 46b.

[0029] Next, the configuration of the holding member 43 and the holding manner of the roller member 42 held by the holding member 43 will be described in detail with reference to Fig. 5. As shown in Figs. 5(a) and (b), the holding member 43 is provided in a substantially U-shape that is open downward as a whole when viewed from the left-right direction. The holding member 43 has a bent portion 43a bent in a substantially arc shape upward, a front plate portion 43b provided at the front end of the bent portion 43a, a rear plate portion 43c provided at the rear end of the bent portion 43a, and a roller holding portion 43d provided below the front plate portion 43b.

[0030] The front plate portion 43b has a first rectangular opening 43b1 that opens in a substantially rectangular shape in the front-rear direction at an inner portion in the axial direction. The upper opening end of the first rectangular opening 43b1 has a first bent portion (engaged portion) 43b2 that is bent at a substantially right angle toward the rear side within the first rectangular opening 43b1. The first bent portion 43b2 is engaged with the protrusion 46b1 by the protrusion 46b1 of the base member 46 being abutted against the protrusion 46b1 when the protrusion 46b1 is inserted into the first rectangular opening 43b1. On the other hand, the upper end of the outer portion in the axial direction of the front plate portion 43b has an abutment portion 43b3 that is bent in a substantially V-shape toward the front side when viewed from the side. The abutment portion 43b3 abuts against the side plate 46b on the outer side in the axial direction of the base member 46 when the holding member 43 is assembled to the base member 46, thereby restricting the front plate portion 43b from abutting against the side plate 46b.

[0031] The rear plate portion 43c is provided below the front plate portion 43b. A second rectangular opening 43c1 that opens in a substantially rectangular shape in the front-rear direction is provided at the approximate center of the rear plate portion 43c. A second bent portion 43c2 that is bent toward the rear side is provided at the lower opening end of the second rectangular opening 43c1. The second bent portion 43c2 is engaged in the rear end plate opening 46c1 of the base member 46 when the rear plate portion 43c is accommodated in the gap 46S of the base member 46 as described below.

[0032] The roller holding portion 43d has a first plate portion 43d1 bent at a substantially right angle from the lower end of the front plate portion 43b toward the rear side, a second plate portion 43d2 bent at a substantially right angle from a part of the rear end (the center portion in the left-right direction) of the first plate portion 43d1 toward the lower side so as to open toward the front side, and a pair of third plate portions 43d3 bent at a substantially right angle from both left-right ends of the first plate portion 43d1 toward the lower side. The tip of the second plate portion 43d2 is bent at a substantially right angle toward the front side. The space surrounded by the first plate portion 43d1, the second plate portion 43d2, and the pair of third plate portions 43d3 is the storage space 43S (see FIG. 3) in which the roller member 42 is stored and held. The storage space 43S is open on the left and right sides, respectively, on the front and rear sides where the second plate portion 43d2 is not provided, and is dimensioned so that the roller member 42 fits in with a small gap between each of the plate portions 43d1, 43d2, and 43d3.

[0033] The roller member 42 accommodated in the accommodation space 43S has an outer circumferential surface 42a that abuts or is close to the first plate portion 43d1 and the second plate portion 43d2, and both ends abut or are close to the pair of third plate portions 43d3. When the roller member 42 is accommodated in the accommodation space 43S, the front and rear portions of the outer circumferential surface 42a of the roller member 42 that do not face the second plate portion 43d2 are exposed from the accommodation space 43S. Therefore, when the portions of the roller member 42 exposed from the accommodation space 43S abut against the base member 46 or the rotating sleeve SL as described below, the roller member 42 rotates and slides around its roller axis in accordance with the rotation of the rotating sleeve SL, etc.

[0034] Next, the assembly of each member constituting the rotation mechanism 40 will be described with reference to FIG. 3 and FIG. 6. FIG. 6 illustrates the rotation mechanism 40 provided on the left side of the lower surface 20b of the housing 20. First, the small diameter portion 44b of the rotation shaft 44 is inserted into the sleeve through hole SL1. Next, the held portion 44c of the rotation shaft 44 is fitted into the circular cutout portion 46b2 arranged on the outer side in the axial direction among the circular cutout portions 46b2 of the base member 46 so that the rotation sleeve SL is arranged between the pair of circular cutout portions 46b. Next, the rotation washer 48 is inserted into the flat surface portion 44b1 of the rotation shaft 44 exposed from the inner side in the axial direction of the base member 46, and the raised portion 48b of the rotation washer 48 is fitted into the circular cutout portion 46b2 arranged on the inner side in the axial direction among the circular cutout portions 46b2. As a result, with the rotating sleeve SL positioned between the pair of side plates 46b of the base member 46, the rotating shaft 44 is held relative to the base member 46 so as to be rotatable about its axis.

[0035] Next, the holding member 43 holding the roller member 42 is assembled to the base member 46. Specifically, first, the roller member 42 is accommodated in the accommodation space 43S of the holding member 43. Next, while accommodating the second plate portion 43d2 of the holding member 43 between the pair of side plates 46b, the roller holding portion 43d is accommodated on the side of each arc-cut portion 46b3 so that the portion of the roller member 42 exposed from the accommodation space 43S abuts or is close to each arc-cut portion 46b3 of the base member 46. Then, the rear plate portion 43c of the holding member 43 is accommodated in the gap 46S of the base member 46, and the second bent portion 43c2 is engaged in the rear end plate opening 46c1. In this way, the holding member 43 is assembled to the base member 46. It should be noted that, without being limited to the above, even if there is no gap 46S, the rear plate portion 43c of the holding member 43 may be bonded to the rear end plate 46c of the base member 46 by adhesive or by using a solder alloy or the like.

[0036] The length of the holding member 43 in the front-rear direction when assembled to the base member 46 is shorter than the length of the holding member 43 in the front-rear direction when it is released. Therefore, when the holding member 43 is assembled to the base member 46, the elastic force of the leaf spring constituting the holding member 43 is applied from the bent portion 43a to the roller holding portion 43d side, and the roller holding portion 43d and the roller member 42 held by the roller holding portion 43d are biased toward each of the arc-cut portions 46b3 (downward). In addition, the protrusion 46b1 of the base member 46 is located on the side facing the holding member 43. In addition, the front plate portion 43b of the holding member 43 and the portion of the roller member 42 exposed from the roller holding portion 43d are arranged on the rotational trajectory of the wing portions 48a1, 48a2 of the rotating washer 48. That is, the front plate portion 43b of the holding member 43 and the roller member 42 are provided at a position where they interfere with the wing portions 48a1, 48a2 by the rotation of the rotating washer 48 about the axis. Therefore, as described below, the rotating wing portion 48a1 can bend the front plate portion 43b backward with the stress generated by contacting the front plate portion 43b with respect to the protrusion 46b1 engaged with the first bent portion 43b2, thereby releasing the engagement between the protrusion 46b1 and the first bent portion 43b2, and the rotating wing portion 48a2 can move the roller member 42 and the holding member 43 upward along the inclined portion 46b4 with the stress generated by contacting the roller member 42.

[0037] 8(b), in a state in which the holding member 43 is assembled to the base member 46, a dimension S1 of a gap formed between the rotating sleeve SL and each of the arc-cutout portions 46b3 is smaller than the outer diameter of the roller member 42, and a dimension S2 of a gap formed between the rotating sleeve SL and each of the inclined portions 46b4 is larger than the outer diameter of the roller member 42. Since the dimension of the gap formed between the rotating sleeve SL and each of the arc-cutout portions 46b3 gradually decreases as it advances downward, when the roller member 42 slides toward each of the arc-cutout portions 46b3, the roller member 42 is sandwiched between the rotating sleeve SL and each of the arc-cutout portions 46b3 (each of the inclined portions 46b4), and the roller member 42 is pressed against the outer circumferential surface (contact surface) of the rotating sleeve SL, making the rotating sleeve SL unrotatable. On the other hand, when the roller members 42 are slid toward the opposite side (upward) from the arc-cut portions 46b3, the roller members 42 are separated from the outer circumferential surface of the rotating sleeve SL, allowing the rotating sleeve SL to rotate.

[0038] Returning to the description of the assembly mode of the rotation mechanism 40, next, the rotation shaft 44, the base member 46, and the holding member 43 are assembled to the arm 34L. First, the wound portion of the coil spring SP is assembled around the large diameter portion 44a of the rotation shaft 44. At this time, one end SPa of the coil spring SP is engaged with the engagement recess 34L1b of the arm 34L. Next, the protrusion 44d of the rotation shaft 44 is fitted into the shaft support hole portion 34L1a of the arm 34L from the inside in the axial direction, and the mounting screw 41 is screwed into the screw hole 44a1 to fix the rotation shaft 44 to the arm 34L. Next, the first to third washers W1 to W3 are fitted into the small diameter portion 44b of the rotation shaft 44 exposed from the inside in the axial direction of the rotation washer 48.

[0039] Finally, the tightening nut 49 is tightened into the screw groove 44G of the rotating shaft 44, and the tightening nut 49 is attached. Through the above procedure, the rotation mechanism 40 is assembled to the arm 34L, and the rotating shaft 44 rotates about its axis together with the arm 34L. Furthermore, as the rotating shaft 44 rotates, the rotating sleeve SL press-fitted into the rotating shaft 44 rotates about its axis together with the rotating shaft 44. Note that the assembly of the holding member 43 to the base member 46 described above may be performed after the rotating shaft 44, the base member 46, and the holding member 43 are assembled to the arm 34L.

[0040] Next, referring to Fig. 7, an operation mode of the torque limiter acting in the rotation mechanism 40 will be described. As shown in Fig. 7, by tightening the tightening nut 49 in the assembly process of the rotation mechanism 40, the rotating washer 48 is pressed against the rotating sleeve SL via the first to third washers W1 to W3. As a result, the rotating sleeve SL is sandwiched between the rotating washer 48 and the held portion 44c of the rotating shaft 44 in the left-right direction, and the frictional force (static frictional force) acting between these members causes the rotating sleeve SL to rotate around the axis together with the rotating shaft 44. The magnitude of the static frictional force acting between the rotating washer 48 and the rotating sleeve SL and between the rotating shaft 44 and the rotating sleeve SL can be adjusted by changing the tightening load of the tightening nut 49.

[0041] On the other hand, when the roller member 42 is pressed against the outer peripheral surface of the rotating sleeve SL, and the rotating sleeve SL becomes unable to rotate, the rotating shaft 44 and the arm 34L become unable to rotate together with the rotating sleeve SL. However, when an excessive rotational torque acts on the rotating shaft 44 and the arm 34L, in other words, when a torque equal to or greater than a predetermined torque is generated around the axis of the rotating shaft 44 and the arm 34L, the torque exceeds the static frictional force acting between the rotating washer 48 and the rotating sleeve SL and between the rotating shaft 44 and the rotating sleeve SL, and the rotating shaft 44 starts to slip relative to the rotating sleeve SL. As a result, only the rotating shaft 44 and the arm 34L rotate around the axis without the rotating sleeve SL rotating. In other words, the torque limiter acts.

[0042] Next, the operation of the one-way clutch acting in the rotation mechanism 40 will be described. As described above, in the closed state shown in Fig. 8(a) and (b), the roller member 42 is biased (pressed) toward each of the arc-cut portions 46b3 by the elastic force of the leaf spring constituting the holding member 43, and the roller member 42 is in contact with the outer circumferential surface of the rotating sleeve SL. When the operator attempts to rotate the arm 34L (rotating shaft 44) from this state in a direction to open the arm 34L (rotating shaft 44) relative to the lower surface 20b of the housing 20 against the elastic force of the coil spring SP (hereinafter referred to as "opening direction (first direction) D1"), the rotating sleeve SL and the rotating washer 48 rotate clockwise in Fig. 8, and the roller member 42 rotates counterclockwise following the rotating sleeve SL, and the roller member 42 slides upward along each of the inclined portions 46b4 against the elastic force of the holding member 43. In this manner, the arm 34L (rotating shaft 44) is permitted to rotate in the opening direction D1.

[0043] On the other hand, when the operator tries to rotate the arm 34L (rotating shaft 44) in a direction to close the arm 34L (hereinafter referred to as the "closing direction (second direction) D2") with respect to the lower surface 20b of the housing 20 in a state where the arm 34L is opened to a predetermined angle with respect to the lower surface 20b of the housing 20 as described above, the rotating sleeve SL and the rotating washer 48 rotate counterclockwise in FIG. 8, the roller member 42 rotates clockwise following the rotating sleeve SL, and the roller member 42 is pressed downward by the elastic force of the holding member 43 and slides downward along each inclined portion 46b4 toward each arc-cut portion 46b3 side. As a result, the roller member 42 is sandwiched between the rotating sleeve SL and each arc-cut portion 46b3 (each inclined portion 46b4), and the roller member 42 is pressed against the outer circumferential surface of the rotating sleeve SL, making the rotating sleeve SL unrotatable. In this way, the rotation of the arm 34L (rotating shaft 44) in the closing direction D2 is restricted. As described above, in the rotation mechanism 40, a one-way clutch acts to restrict rotation in one direction about the axis.

[0044] Next, referring to Figs. 8 to 13, an operation mode when opening the arm 34L (34R) to a desired angle and when closing the opened arm 34L (34R) in the tilt mechanism TL of the projection device 10 according to this embodiment will be described. When the arm 34L (34R) is rotated in the opening direction from the closed state shown in Fig. 8 within a range of rotation angles of 5° to 80°, the roller member 42 is in a state of abutment with the outer circumferential surface of the rotating sleeve SL (hereinafter referred to as the "abutment state (first state)"). Therefore, a one-way clutch acts on the rotation mechanism 40. For example, as shown in Fig. 9, when the operator rotates the arm 34L (34R) in the opening direction so that the rotation angle θ1 is 45°, the one-way clutch acts to permit rotation in the opening direction, so that the arm 34L (34R) can be rotated with a light force.

[0045] On the other hand, when an operator rotates the arm 34L (34R) in the opening direction and then tries to rotate it in the closing direction, the one-way clutch acts to restrict the rotation in the closing direction. Even when the rotation of the arm 34L (34R) in the closing direction is restricted by the one-way clutch in this manner, if the operator tries to rotate the arm 34L (34R) in the closing direction with excessive force, the torque limiter acts on the rotation mechanism 40, and the arm 34L (34R) can be rotated in the closing direction.

[0046] When the operator rotates the arm 34L (34R) from the state shown in Fig. 9 further in the opening direction to a rotation angle θ2 = 80° (see Fig. 10(a)), as shown in Fig. 10(b), of the wing portions 48a1, 48a2 of the rotating washer 48, the wing portion 48a2 located on the lower side in the closed state rotates from the lower side to the upper side and interferes with the roller member 42 from the lower side, as shown in Fig. 10(b). Then, when the operator rotates the arm 34L (34R) from the state shown in Fig. 10 further in the opening direction to a rotation angle θ3 = 90° (see Fig. 11(a)), one of the wing portions 48a2 interfering with the roller member 42 pushes the roller member 42 together with the roller holding portion 43d upward and slides it, as shown in Fig. 11(b), and thus the front plate portion 43b of the holding member 43 moves upward. During this time, since a gap is generated between the rotating sleeve SL and the inclined portion 46b4 of the roller member 42 located between the rotating sleeve SL and the inclined portion 46b4, the arm 34L can easily rotate to the rotation angle θ3.

[0047] Then, as shown in Fig. 11(b), the first rectangular opening 43b1 of the holding member 43 moves above the protrusion 46b1 of the base member 46, and the protrusion 46b1 enters into the first rectangular opening 43b1. When the operator returns the arm 34L (34R) in the closing direction from this state to, for example, a rotation angle θ4 = 80° (see Fig. 12(a)), the first bent portion 43b2 of the holding member 43 is caught by the protrusion 46b1, and the first bent portion 43b2 is engaged with the protrusion 46b1, as shown in Fig. 12(b). As a result, the front plate portion 43b is fixed at that position, and the roller holding portion 43d and the roller member 42 are restricted from moving downward (toward each circular arc missing portion 46b3), so that the roller member 42 is separated from the outer circumferential surface of the rotating sleeve SL (hereinafter referred to as the "separated state (second state)"), and the one-way clutch is released.

[0048] In this manner, in the separated state where the one-way clutch is released, rotation in the opening and closing directions is permitted, and only the biasing force of the coil spring SP acts on the arm 34L (34R). Therefore, in the separated state, even if the operator does not apply force to the arm 34L (34R), the biasing force of the coil spring SP causes the arm 34L (34R) to rotate in the closing direction with the protrusion 46b1 remaining engaged with the first bent portion 43b2.

[0049] In the separated state, when arm 34L (34R) returns in the closing direction to a rotation angle θ5=13° (see FIG. 13(a)), as shown in FIG. 13(b), of wing portions 48a1, 48a2 of rotating washer 48, wing portion 48a1 which is located at the upper side in the closed state rotates from the rear side to the front side and interferes from the front side with front plate portion 43b of holding member 43. When the operator further rotates arm 34L (34R) in the closing direction from this state, wing portion 48a1 presses front plate portion 43b rearward, and first bent portion 43b2 comes off protrusion 46b1. When the first bent portion 43b2 is disengaged from the projection 46b1, the restriction of the holding member 43 by the projection 46b1 is released, so that the roller holding portion 43d and the roller member 42 slide downward (toward each of the arc-cut portions 46b3) due to the elastic force of the leaf spring constituting the holding member 43, and the roller member 42 abuts against the outer circumferential surface of the rotating sleeve SL and transitions to an abutting state, as shown in Figures 8(a) and 8(b). That is, the one-way clutch operates again.

[0050] In this way, in the tilt mechanism TL of the projection device 10 according to this embodiment, the rotation mechanism 40 transitions between an abutment state in which the one-way clutch acts and a separation state in which the one-way clutch is released. In addition, in the rotation mechanism 40, a torque limiter acts when an excessive force acts on the arm 34L (34R). Therefore, the arm 34L (34R) can be rotated to a desired rotation angle with a light force and held there, and even in the abutment state, the arm 34L (34R) can be closed by acting the torque limiter. For example, when it is desired to change the rotation angle of the arm 34L (34R) from 45° to 30°, it is possible to rotate the arm 34L (34R) in the open direction until the rotation angle becomes 90° to set it to a separation state, close the arm 34L (34R) once, and open it again to set the rotation angle to 30°, which requires less force than to rotate the arm 34L (34R) in the closing direction by acting the torque limiter. Note that the rotation angles θ1 to θ5 are not limited to those described above and can be set to any value as long as the conditions θ1<θ2<θ3 and θ5<θ4<θ3 are satisfied.

[0051] As described above, the projection device 10 according to this embodiment includes a housing 20, a rotating shaft 44 which rotates about its axis relative to the housing 20, arms 34R, 34L which extend radially from the rotating shaft 44 and rotate together with the rotating shaft 44 to support the housing 20 in accordance with the installation angle of the housing 20 relative to the installation surface IS, a rotating sleeve SL which is provided around the axis of the rotating shaft 44 and rotates together with the rotating shaft 44, and which slides relative to the rotating shaft 44 when a torque equal to or greater than a predetermined torque is generated around the axis of the rotating shaft 44, and a roller member 42 which follows the rotating sleeve SL while in contact with the outer circumferential surface of the rotating sleeve SL. When the roller member 42 is in contact with the outer circumferential surface of the rotating sleeve SL, the rotating sleeve SL is allowed to rotate in the opening direction, and when the roller member 42 rotates in the closing direction, a one-way clutch is activated which presses the roller member 42 and restricts rotation in the closing direction, and when the roller member 42 is separated from the outer circumferential surface of the rotating sleeve SL, the one-way clutch is released and rotation in the opening direction and closing direction is allowed.

[0052] Since the projection device 10 according to the present embodiment is configured as described above, when the rotating shaft 44 is rotated together with the rotating sleeve SL in the opening direction (when the arms 34R, 34L are opened relative to the housing 20), the roller members 42 are brought into contact with each other to actuate the one-way clutch, thereby allowing the rotating shaft 44 and the rotating sleeve SL to rotate in the opening direction with a light force and restricting rotation in the closing direction, thereby making it possible to adjust the installation angle as desired. On the other hand, when the rotating shaft 44 is rotated together with the rotating sleeve SL in the closing direction (when the arms 34R, 34L are closed relative to the housing 20), the roller members 42 are brought into a separated state to release the one-way clutch, allowing the rotating shaft 44 and the rotating sleeve SL to rotate in the opening direction with a light force.

[0053] Furthermore, in the projection device 10 according to this embodiment, even if the arms 34R, 34L are forcibly closed with excessive force when the one-way clutch is in operation (when a torque equal to or greater than a predetermined torque is generated around the axis of the rotation shaft 44), the rotating sleeve SL is designed to slide relative to the rotation shaft 44. Therefore, even if the rotation of the rotating sleeve SL in the closing direction is impossible (even if the rotation in the closing direction is restricted), the rotation shaft 44 can be rotated in the closing direction, the arms 34R, 34L can be closed, and damage to the arms 34R, 34L can be prevented. In this way, in this embodiment, a projection device 10 capable of adjusting the installation angle with an appropriate torque can be realized. The projection device 10 according to this embodiment can adjust the installation angle with a light force, and will not be damaged even if it is forcibly closed.

[0054] The projection device 10 also includes a rotating washer 48 that rotates together with the rotating shaft 44, and when the rotating washer 48 rotates in the opening direction by a predetermined angle or more in the abutting state, the rotating washer 48 slides the roller member 42 in a direction away from the outer circumferential surface of the rotating sleeve SL to transition to a separated state, and when the rotating washer 48 rotates in the closing direction by a predetermined angle or more in the separated state, the rotating washer 48 slides the roller member 42 in a direction abutting against the outer circumferential surface of the rotating sleeve SL to transition to abutting state. According to this configuration, by including the rotating washer 48 that rotates together with the rotating shaft 44, it is possible to provide a specific configuration for opening the arms 34R, 34L by a predetermined angle or more in the abutting state to transition the roller member 42 to the separated state, and for closing the arms 34R, 34L by a predetermined angle or more in the separated state to transition the roller member 42 to the abutting state.

[0055] Furthermore, the projection device 10 includes a base member 46 that rotatably holds the rotating shaft 44 relative to the housing 20, and a holding member 43 that rotatably holds the roller member 42 relative to the base member 46, and the roller member 42 slides on the holding member 43. According to this configuration, by using a member that holds the rotating shaft 44 and a member that holds the roller member 42 as separate members, it is possible to provide a specific configuration for pressing the roller member 42 against a rotating sleeve SL provided around the axis of the rotating shaft 44, and a specific configuration for separating the roller member 42 from the rotating sleeve SL.

[0056] Moreover, in the projection device 10, the base member 46 forms a gap between itself and the rotating sleeve SL that is equal to or smaller than the outer diameter of the roller member 42, the holding member 43 has elasticity and urges the roller member 42 toward the gap, the roller member 42 is urged toward the gap by the holding member 43 as the rotating sleeve SL rotates in the closing direction and is pressed against the rotating sleeve SL between the holding member 43, and the roller member 42 follows the rotation of the rotating sleeve SL against the urging force of the holding member 43 as the rotating sleeve SL rotates in the opening direction. According to this configuration, by utilizing the urging force of the holding member 43 having elasticity, a specific configuration can be realized for pressing the roller member 42 against the rotating sleeve SL as the rotating sleeve SL rotates in the closing direction.

[0057] Moreover, in the projection device 10, the base member 46 has a protrusion 46b1 provided on the side facing the holding member 43, and the holding member 43 has a first bent portion 43b2 that engages with the protrusion 46b1 at a position where the roller member 42 moves away from the rotating sleeve SL. When the rotating washer 48 rotates in the opening direction by a predetermined angle or more in the abutting state, the rotating washer 48 interferes with the roller member 42, causing the holding member 43 to slide together with the roller member 42 and the first bent portion 43b2 to engage with the protrusion 46b1. When the rotating washer 48 rotates in the closing direction by a predetermined angle or more in the separated state, the rotating washer 48 interferes with the holding member 43, causing the roller member 42 to slide together with the holding member 43 and the protrusion 46b1 to come off the first bent portion 43b2.

[0058] According to the above configuration, the rotating washer 48 rotates in the opening direction by a predetermined angle or more, and the first bent portion 43b2 engages with the protrusion 46b1, so that the roller member 42 is separated from the rotating sleeve SL, and the separated state can be maintained. Then, the rotating washer 48 rotates in the closing direction by a predetermined angle or more, and the protrusion 46b1 disengages from the first bent portion 43b2, so that the roller member 42 transitions from the separated state to the abutting state. In this way, it is possible to provide a specific configuration for maintaining the separated state until the rotating washer 48 rotates in the closing direction by a predetermined angle or more in the separated state.

[0059] Furthermore, in the projection device 10, the rotating washer 48 has blade portions 48a1, 48a2 extending in the radial direction thereof, and the blade portions 48a1, 48a2 interfere with the roller member 42 to cause the roller member 42 to slide, and the blade portions 48a1, 48a2 interfere with the holding member 43 to cause the holding member 43 to slide. According to this configuration, by arranging the roller member 42 and the holding member 43 on the rotational orbit of the blade portions 48a1, 48a2, it is possible to provide a specific configuration for sliding the roller member 42 and the holding member 43 by utilizing the rotating washer 48.

[0060] In the projection device 10, the blades 48a1, 48a2 are provided as a pair with a gap therebetween around the axis of the second rotating member. With this configuration, one of the pair of blades 48a1, 48a2 can be used to slide the roller member 42 and the holding member 43 when transitioning from the contact state to the separation state, and the other can be used to slide the roller member 42 and the holding member 43 when transitioning from the separation state to the contact state. Therefore, the rotation washer 48 can be shifted from the contact state to the separation state and from the separation state to the contact state within a predetermined rotation angle range.

[0061] The projection device 10 also includes a coil spring SP that is provided around the axis of the rotation shaft 44 and biases the rotation shaft 44 in the closing direction. With this configuration, in a separated state in which the one-way clutch does not act, the rotation shaft 44 can be rotated in the closing direction by the biasing force of the coil spring SP without applying force to the arms 34R, 34L. That is, a configuration can be realized in which the arms 34R, 34L automatically close in the separated state.

[0062] Furthermore, in the projection device 10, the rotating shaft 44, the arms 34R, 34L, the rotating sleeve SL, the rotating washer 48, and the roller member 42 are provided on both end edge sides constituting the opposite sides of the housing 20, respectively, and the arms 34R, 34L are provided in a manner that connects the pair of rotating shafts 44. According to this configuration, the arms 34R, 34L can support the housing 20 on both end edge sides constituting the opposite sides of the housing 20, and the housing 20 can be stably supported at any installation angle.

[0063] Furthermore, in the projection device 10, the housing 20 has a projection port opening 23a. This makes it possible to realize a projection device 10 that is compact and has a simple configuration and is capable of projecting at a desired installation angle.

[0064] In this disclosure, the phrase "at least" includes multiple combinations or numbers greater than the number indicated, unless otherwise specified, such as "at least one of A, B, and C" meaning "(A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C)". Also, for example, if C is multiple, the phrase "at least one of A, B, and C" means "(A), (B), (at least one or more C), (A and B), (A and at least one or more C), (B and at least one or more C), or (A, B, and at least one or more C)". A multiple A or a multiple B are also interpreted as being treated in the same manner as above.

[0065] The terms "first", "second", and "third", etc., are applied merely for convenience in description and to distinguish one from the other, unless otherwise specified, and do not imply any other kind of ordering of the numbers (e.g., spatial, temporal, logical, etc.). The term "or" is used to refer to non-exclusive things, unless otherwise specified, such as the phrase "A or B" meaning "(A but not B), (B but not A), and any of (A and B)".

[0066] The above-described embodiments 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, substitutions, 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 and its equivalents described in the claims. [Explanation of symbols]

[0067] 10 Projection device 11 Projection port 20 Housing 20a Top surface 20b Bottom surface 20c Left side 20d Right side 20e Front 20f Rear 21 Upper case 22 Lower case 23 Front panel 23a Projection port opening 23b Air intake port 23c Exhaust port 24 Rear panel 25 Left side panel 25a Air intake 25b Exhaust port 26a First arm receiving groove 26b Second arm receiving groove 27 Mounting portion 27a Receiving recess 27b Mounting surface 27b1 Screw hole 34L Arm 34L1 First arm plate 34L1a Axis support hole portion 34L1b Locking recess 34L2 Second arm plate 34R Arm 34R1 First arm plate 34R2 Second arm plate 35 Screw member 36 Connection plate 40 Rotation mechanism 41 Mounting screw 42 Roller member 42a Outer circumferential surface 43 Holding member 43S Storage space 43a Bend 43b Front plate part 43b1 1st rectangular opening 43b2 First bent portion 43b3 Contact portion 43c Rear plate part 43c1 2nd rectangular opening 43c2 Second bending portion 43d Roller holding portion 43d1 1st plate part 43d2 2nd plate part 43d3 Third plate section 44 Rotation axis 44G Thread groove 44a Large diameter part 44a1 Screw hole 44b Small diameter part 44b1 Flat surface shape part 44c Retained part 44d Projection 44d1 Screw hole 46 Base material 46S Gap 46a Bottom plate 46b Side plate 46b1 Protrusion 46b2 Circular notch 46b3 Arc missing part 46b4 Inclined part 46c Rear end plate 46c1 Rear end plate opening 48 Rotating washer 48a Washer plate surface 48a1 Habe 48a2 Habe 48b Raised portion 48c Washer through hole 49 Tightening nut D1 Opening direction D2 Closing direction H1,H2 Mounting screw holes IS Installation surface SL Rotating sleeve SL1 Sleeve through hole SP Roll spring SPa one end SPb other end TL Tilt mechanism W1 First washer W2 Second washer W3 Third washer θ1~θ5 Rotation angle

Claims

1. The housing and a rotation shaft that rotates around an axis relative to the housing; a support member extending radially from the rotation shaft and rotating together with the rotation shaft to support the housing in a state where an installation angle of the housing is adjusted with respect to an installation surface; a first rotating member provided around the rotation shaft and rotating together with the rotation shaft; a driven member that follows the first rotating member while being in contact with the contact surface of the first rotating member, In a first state in which the driven member is in contact with the contact surface of the first rotating member, the first rotating member is allowed to rotate in a first direction about its axis, and when the driven member rotates in a second direction about its axis, a one-way clutch acts to press the driven member and restrict rotation in the second direction, and in a second state in which the driven member is separated from the contact surface of the first rotating member, the one-way clutch is released and rotation in the first direction and the second direction is allowed. electronic equipment.

2. a second rotating member that rotates together with the rotating shaft; When the second rotation member is rotated in the first direction so as to form an angle equal to or larger than a first angle with respect to the housing in the first state, the second rotation member slides the driven member in a direction away from the contact surface of the first rotation member, thereby transitioning to the second state; In the second state, when the second rotation member rotates in the second direction so as to form an angle equal to or greater than a second angle with respect to the housing, the second rotation member slides the driven member in a direction to abut against the abutment surface of the first rotation member, thereby transitioning to the first state. The electronic device according to claim 1 .

3. a base member that holds the rotation shaft rotatably relative to the housing; a holding member that holds the driven member rotatably relative to the base member, The driven member slides on the retaining member. The electronic device according to claim 1 .

4. a gap is formed between the base member and the first rotary member, the gap being equal to or smaller than an outer diameter of the driven member; the holding member has elasticity and biases the driven member toward the gap; When the first rotating member rotates in the second direction, the driven member is urged toward the gap by the holding member and is pressed against the first rotating member between the holding member and the first rotating member, and when the first rotating member rotates in the first direction, the driven member is driven by the rotation of the first rotating member against the urging force of the holding member. The electronic device according to claim 3 .

5. A second rotating member that rotates together with the rotating shaft, the base member has an engaging portion provided on a side facing the holding member, the holding member has an engaged portion that is engaged with the engaging portion at a position where the driven member is separated from the first rotating member, When the second rotation member is rotated in the first direction so as to form an angle equal to or larger than a first angle with respect to the housing in the first state, the second rotation member interferes with the driven member, causing the holding member to slide together with the driven member, and the engaged portion engages with the engaging portion, When the second rotation member rotates in the second direction so as to form an angle equal to or greater than a second angle with respect to the housing in the second state, the second rotation member interferes with the holding member, causing the driven member to slide together with the holding member, and the engaging portion disengages from the engaged portion. The electronic device according to claim 3 .

6. the second rotating member has a wing portion extending in its radial direction, The wing portion interferes with the driven member, causing the driven member to slide, The blade portion interferes with the holding member, causing the holding member to slide. The electronic device according to claim 5 .

7. The electronic device according to claim 6 , wherein the wing portion is provided as a pair spaced apart around the axis of the second rotating member.

8. The electronic device according to claim 2 , further comprising a coil spring member provided around the rotation shaft and biasing the rotation shaft in the second direction.

9. the rotary shaft, the support member, the first rotary member, the second rotary member, and the driven member are provided on both end edge sides that define opposite sides of the housing, respectively; The support member is provided in a manner connecting the pair of rotation shafts. The electronic device according to claim 2 .

10. the first rotating member slides relative to the rotating shaft when a torque equal to or greater than a predetermined torque is generated around the axis of the rotating shaft; The electronic device according to claim 1 .

11. 11. The electronic device according to claim 1, wherein the housing is a projection device having a projection opening.

Images