electronic machines

Abstract

To provide an electronic device that is in a compact and simple configuration and has a tilting mechanism that can be adjusted to a desired installation angle.SOLUTION: A projection device 10 includes: a casing 20; a rotating shaft rotating around an axis relative to the casing 20; a pair of arms 34a, 34b that extends in a diametric direction from the rotating shaft, and supports the casing 20 according to an installation angle of the casing 20 relative to an installation surface by rotation along with the rotating shaft; a bearing part that is provided in the casing 20, and houses the rotating shaft rotatably around the axis and is in slide contact with one portion of an outer periphery of the turning rotating shaft; and a plate spring 37 that is in slide contact with one portion of an outer periphery of the turning rotating shaft and presses and holds the rotating shaft when adjusting an installation angle. The bearing part is shaped such that the side of the plate spring 37 is opened and a side opposite to the plate spring 37 is narrowed gradually in a cross-section view orthogonal to an axial direction of the rotating shaft.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an electronic device.

Background Art

[0002] Conventionally, in an electronic device such as a projection device, a tilt mechanism for adjusting the installation angle of a housing has been proposed. For example, Patent Document 1 discloses a projection device including a lifting member provided with a screw portion on its outer periphery and movable up and down from the lower surface of a case, and a slide member biased toward the screw portion. In this projection device, by the slide member and the screw portion abutting on an inclined surface, the lifting member can be pulled out by hand from the lower surface of the case and rotated to finely adjust the amount of protrusion from the lower surface of the case. Thereby, the projection device can be set to a desired elevation angle.

Prior Art Documents

Patent Documents

[0003] [[ID=,22]]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a tilt mechanism using a lifting member provided with a screw portion, when attempting to miniaturize an electronic device, especially when the housing is thin, the length of the screw cannot be set long enough, and the housing may not be adjusted to a desired installation angle. On the other hand, if a tilt mechanism provided with a complex torque hinge mechanism is provided, the torque hinge mechanism may occupy a large space in the housing, and the miniaturization of the electronic device may not be achieved.

[0005] An object of the present invention is to provide an electronic device provided with a tilt mechanism that is compact, has a simple configuration, and can be adjusted to a desired installation angle.

Means for Solving the Problems

[0006] An electronic device according to one aspect of the present invention includes a housing, a shaft portion that rotates about an axis relative to the housing, a support portion that extends radially from the shaft portion and rotates together with the shaft portion to support the housing according to the installation angle of the housing with respect to the installation surface, a bearing portion provided in the housing and housing the shaft portion, and a sliding contact with a part of the outer circumference of the rotating shaft portion, when adjusting the installation angle Due to elastic restoring force The shaft portion part Press and hold Leaf spring The bearing portion comprises the above, and in a cross-sectional view perpendicular to the axial direction of the shaft portion, Leaf spring The side opens and the Leaf spring The shape is such that the opposite side gradually narrows. The leaf spring has a substantially rectangular surface and a fixing portion that is fixed to the housing, and a spring opening that opens substantially rectangular is provided near the fixing portion of the leaf spring, and in the spring opening, there is a pair of slits at both ends in the short-side direction of the leaf surface of the leaf spring, each extending along the long-side direction and in the direction in which the fixing portion exists. . [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an electronic device equipped with a tilt mechanism that can be adjusted to a desired installation angle in a compact and simple configuration. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of the projection device according to the first embodiment, viewed from the front and below. [Figure 2] This is an exploded perspective view of the tilt mechanism of the projection device according to the first embodiment. [Figure 3] This is a plan view of one bearing portion in the projection device according to the first embodiment. [Figure 4] This is a perspective view of a leaf spring in a projection device according to the first embodiment. [Figure 5] This is an enlarged plan view of the vicinity of one leaf spring in the closed state of the projection device according to the first embodiment, as seen from the bottom side. [Figure 6] This is a perspective view of the bottom surface of the projection device according to the first embodiment, as seen from the inside of the housing. [Figure 7]This is a cross-sectional view of the projection device according to the first embodiment, showing the vicinity of one leaf spring in the closed state of the arm, viewed in a cross section perpendicular to the axial direction of the rotation axis, and is a cross-sectional view of the VII-VII section in Figure 5. [Figure 8] This is an enlarged perspective view from the bottom side of the vicinity of one leaf spring in the open state of the projection device according to the first embodiment. [Figure 9] This is a cross-sectional view of the projection device according to the first embodiment, showing the vicinity of one leaf spring in the open state of the arm, viewed from a cross section perpendicular to the axial direction of the rotation axis, and is a cross-sectional view of the IX-IX section in Figure 8. [Figure 10] This is a side view showing the projection device according to the first embodiment installed on a mounting surface with the arm in the open position. [Figure 11] This is an enlarged plan view of the vicinity of one leaf spring in the closed state of the projection device according to the second embodiment, as seen from the bottom side. [Modes for carrying out the invention]

[0009] (First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to Figures 1 to 10. As shown in Figure 1, the projection device (electronic device) 10 according to the first embodiment comprises a housing 20 that is a substantially elongated rectangular box shape with the left-right direction as its longitudinal direction and has six surfaces (top surface 20a, bottom surface 20b, left side surface 20c, right side surface 20d, front surface 20e, and rear surface 20f). The projection device 10 has a projection opening 11 on the front surface 20e side from which projection light is emitted. In the following description, left and right in the projection device 10 refers to the left-right direction with respect to the direction of emission of projection light from the projection opening 11, and front and rear refers to the front and rear direction with respect to the direction of propagation of projection light in the projection device 10. The top surface 20a side is referred to as the upper side of the projection device 10, and the bottom surface 20b side is referred to as the lower side of the projection device 10.

[0010] The housing 20 has an upper case 21 comprising a top surface 20a and part of the right side surface 20d, and a lower case 22 comprising a bottom surface 20b and part of the 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 air intake port 23b, and an exhaust port 23c. The left panel 25 is provided with an air intake port 25a and connection ports 25b for connectors for image input / output, etc. In the projection device 10, a tilt mechanism 30 for adjusting the installation angle of the housing 20 is provided on the front part of the bottom surface 20b of the housing 20.

[0011] As shown in Figures 1 and 2, the tilt mechanism 30 consists of a pair of arms (support parts) 34a and 34b, a connecting plate 35, and a torque hinge part 32 for rotating both arms 34a and 34b relative to the housing 20. The pair of arms 34a and 34b and the connecting plate 35 together form a roughly U-shape. The front side of both arms 34a and 34b rotates downward by the torque hinge part 32. The tilt mechanism 30 allows the projection device 10 to be projected at any installation angle (elevation angle) within the range between a state in which the pair of arms 34a and 34b are closed relative to the lower surface 20b of the housing 20, in other words, a state in which the pair of arms 34a and 34b are parallel to the lower surface 20b of the housing 20 (hereinafter referred to as the "closed state") and a state in which the pair of arms 34a and 34b are open so as to rise at an angle of approximately 90° relative to the lower surface 20b of the housing 20 (shown by the dashed line in Figure 1; hereinafter referred to as the "open state"). In the following, the shape, connection direction, etc. of each component constituting the tilt mechanism 30 will be explained based on the closed state.

[0012] A pair of arms 34a and 34b are provided on both the left and right ends of the lower surface 20b of the housing 20 (the edges that make up opposite sides of the housing 20). The connecting plate 35 connects the pair of arms 34a and 34b and contacts the installation surface 60 (see Figure 10) according to the installation angle. The pair of arms 34a and 34b are symmetrical in shape and are sheet metal members having first plate portions 34a1 and 34b1 and second plate portions 34a2 and 34b2, respectively. The first plate portions 34a1 and 34b1 are elongated plates with both plate surfaces facing left and right. A pivot hole portion 34c is provided on the base end (rear side) of the first plate portions 34a1 and 34b1. The second plate portions 34a2 and 34b2 are plate-shaped and are provided on the tip side of the first plate portions 34a1 and 34b1 with their plate surfaces perpendicular to the plate surfaces of the first plate portions 34a1 and 34b1. The pair of arms 34a and 34b each have arm contact portions 34a3 and 34b3 on their front side surfaces (surfaces substantially parallel to the front surface 20e of the housing 20). The lower surface 20b of the housing 20 is provided with a first arm housing groove 26a that opens downward and accommodates the first plate portions 34a1 and 34b1 when closed. On the front side of the first arm housing groove 26a, there is a second arm housing groove 26b that opens downward and is recessed, accommodating the second plate portions 34a2 and 34b2.

[0013] The connection plate 35 is a sheet metal member having a substantially rectangular shape adapted to the dimension in the long side direction of the housing 20. Both end edges of the connection plate 35 in the short side direction are rising portions 35a that rise shallowly downward, and it forms a shallow concave shape in a side view seen from the left - right direction. Both end portions of the connection plate 35 in the long side direction are connected to the plate surfaces of the second plate portions 34a2 and 34b2 by screw members or the like (not shown), connecting between the two arms 34a and 34b. In a state (closed state) where the first plate portions 34a1 and 34b1 of the arms 34a and 34b are housed in the first arm housing grooves 26a, the upper surface of the connection plate 35 abuts against the lower surface 20b of the housing 20, and the rising portions 35a of the connection plate 35 project downward (see FIG. 1). For this reason, when the lower surface 20b of the housing 20 is placed flat with the lower surface facing downward, a pair of installation members 40 made of a rubber material or the like are provided at the rear side portion 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 posture in the closed state.

[0014] The torque hinge portion 32 is provided on both left - and right - end sides of the lower surface 20b of the housing 20, and has a rotation shaft (shaft portion) 36, a leaf spring (holding portion) 37, and a bearing portion 27 provided on the lower surface 20b of the housing 20, respectively. The rotation shaft 36 is a metal shaft - shaped member having a substantially cylindrical shape, and is rotatably housed in the bearing portion 27 described later in a posture where its axial direction is along the left - right direction. The rotation shaft 36 has a notch surface 36a in which a part of the outer periphery is cut out in a planar shape along its axial direction (left - right direction) in a posture along the direction in which it is housed in the bearing portion 27, and its cross - section has a so - called D - cut shape (see FIG. 7). In a posture along the direction in which it is housed in the bearing portion 27, the outer - side end portions of each rotation shaft 36 in the axial direction (left - right direction) are fitted into the shaft - support hole portions 34c provided in the first plate portions 34a1 and 34b1 of the arms 34a and 34b. Thereby, the arms 34a and 34b are pivotally supported by the rotation shaft 36, and the arms 34a and 34b extending in the radial direction of the rotation shaft 36 are made rotatable around the axis of the rotation shaft 36. That is, the arms 34a and 34b rotate together with the rotation shaft 36.

[0015] Here, as shown in FIG. 3, a spring housing portion 28 for housing a leaf spring 37 is provided on the lower surface 20b of the housing 20. The spring housing portion 28 is a recess that opens downward, and its opening is substantially rectangular in plan view. On the bottom surface within the opening of the spring housing portion 28 (hereinafter referred to as the "housing bottom surface 28a"), a bearing portion 27 for housing a rotation shaft 36 is provided in a form that is further recessed from the housing bottom surface 28a. Also, at a substantially central portion in the left-right direction on the front side of the bearing portion 27 on the housing bottom surface 28a, a first positioning pin (first convex portion) 41 that protrudes in a pin shape is provided at a position close to the bearing portion 27. Further, at a substantially central portion in the left-right direction on the front side of the first positioning pin 41 on the housing bottom surface 28a, a housing-side screw hole 28a1, which is a screw hole, is provided.

[0016] On the other hand, two insertion holes (hole portions) 28b1 are provided on the rear-side surface among the side surfaces (hereinafter referred to as the "housing side surfaces (wall surfaces) 28b") within the opening of the spring housing portion 28. The two insertion holes 28b1 open in a substantially rectangular shape across both the housing side surface 28b and the housing bottom surface 28a, and are provided in a spaced-apart form. The height dimension of the openings of the two insertion holes 28b1 is set to a dimension slightly larger than the thickness dimension of the leaf spring 37 described later. The two insertion holes 28b1 open not only in the front-rear direction but also in the vertical direction (see FIG. 6). That is, the openings of the two insertion holes 28b1 are holes that pass through the housing 20 in the front-rear direction and the vertical direction.

[0017] As shown in FIGS. 4 and 5, the leaf spring 37 has a substantially rectangular plate surface, and is disposed within the opening of the spring housing portion 28 in a posture where both plate surfaces face in the vertical direction and its long-side direction is along the front-rear direction. A spring opening portion 37a that opens in a substantially horizontally long rectangular shape is provided at a portion closer to the front side of the leaf spring 37. Slits 37b that extend forward are provided on both the left and right sides of the spring opening portion 37a. The substantially central portion in the left-right direction at the front-side portion of the opening end of the spring opening portion 37a is notched in a substantially arc shape so as to protrude forward along the outer circumference of the first positioning pin 41 (hereinafter, the notched portion is referred to as the "first positioning portion 37a1").

[0018] Approximately in the left-right direction, slightly forward of the spring opening 37a, a spring-side screw hole (fixing part) 37c is provided between two slits 37b. The leaf spring 37 is positioned within the opening of the spring housing 28 such that the spring-side screw hole 37c overlaps with the housing-side screw hole 28a1. The spring fixing screw 50, which is a screw member, is inserted through the spring-side screw hole 37c and the housing-side screw hole 28a1 and screwed in, thereby fixing the leaf spring 37 to the housing bottom surface 28a. Furthermore, by fixing the leaf spring 37 to the housing bottom surface 28a with its long side aligned with the front-rear direction, the first positioning part 37a1 contacts the outer circumference of the first positioning pin 41 and engages with the first positioning pin 41. This restricts the rotation of the leaf spring 37 around the screw axis of the spring fixing screw 50, and positions the leaf spring 37 in the direction of its plate surface.

[0019] Furthermore, the leaf spring 37 has a spring opening 37a and a slit 37b around the spring-side screw hole 37c, which is fixed by a spring fixing screw 50. As a result, even when fixed to the housing bottom surface 28a, the portion behind the spring opening 37a (the portion opposite to the side where the spring-side screw hole 37c is located) is more flexible. Therefore, the leaf spring 37, when fixed to the housing bottom surface 28a, is able to undergo good elastic deformation due to its spring characteristics.

[0020] On both the left and right sides of the rear end of the leaf spring 37, there are insertion portions 37d that extend in a plate shape so as to protrude rearward from the rear end of the leaf spring 37. Each insertion portion 37d is inserted into two insertion holes 28b1 provided in the spring housing 28. As shown in Figure 6, when the leaf spring 37 is fixed to the housing bottom surface 28a, and each insertion portion 37d is inserted into each insertion hole 28b1 along the front-rear direction, at least a part of each insertion portion 37d protrudes from the spring housing 28. The rear side of the leaf spring 37 engages with the housing side surface 28b. Here, since the height dimension of the opening of each insertion hole 28b1 is slightly larger than the thickness dimension of the leaf spring 37, when each insertion portion 37d is inserted into each insertion hole 28b1, each insertion portion 37d is allowed to move in the front-rear direction (the direction of the long side of the plate surface). Furthermore, the left-right dimension of the opening of each insertion hole 28b1 is made slightly larger than the left-right dimension of each insertion portion 37d. Therefore, when each insertion portion 37d is inserted into each insertion hole 28b1, movement of each insertion portion 37d in the left-right direction (the direction of the shorter side of the plate surface) is restricted. When the leaf spring 37 is fixed to the housing bottom surface 28a, the edge portions located between each insertion portion 37d are close to or in contact with the rear side of the housing side surface 28b of the spring housing portion 28 (the wall surface of the housing 20) (hereinafter, these edge portions of the leaf spring 37 are referred to as "proximity portions 37e").

[0021] The bearing portion 27 is provided in a groove-like shape along the left-right direction, opening downwards (towards the leaf spring 37) on the housing bottom surface 28a of the spring housing portion 28, and is sized to accommodate approximately the entire pivot shaft 36. One end of the bearing portion 27 in the left-right direction (the end on the outside relative to the housing 20) is in communication with the first arm housing groove 26a. When the leaf spring 37 is fixed to the housing bottom surface 28a, most of the opening of the bearing portion 27 is covered by the leaf spring 37. As shown in Figure 7, the cross-section of the bearing portion 27 is shaped so that it gradually narrows on the side opposite to the leaf spring 37. Specifically, the cross-section of the bearing portion 27 is approximately V-shaped, with the side opposite to the leaf spring 37 being pointed. The groove-shaped bearing portion 27 has two inclined surfaces (hereinafter referred to as "bearing inclined surfaces 27a") with a substantially V-shaped cross-section on the side opposite to the leaf spring 37, and two side surfaces (hereinafter referred to as "bearing side surfaces 27b") that extend vertically from the open end of the bearing portion 27 to the bearing inclined surfaces 27a.

[0022] The distance between the two opposing bearing sides 27b is slightly larger than the outer diameter of the pivot shaft 36. Therefore, the pivot shaft 36 is housed in the bearing section 27 in contact with each bearing inclined surface 27a and slightly spaced apart from each bearing side 27b. As a result, when the pivot shaft 36 rotates within the bearing section 27, each bearing inclined surface 27a slides against a portion of the outer circumference of the rotating pivot shaft 36. Furthermore, the height dimensions of the two bearing sides 27b and the inclination angles of the two bearing inclined surfaces 27a are set such that when the pivot shaft 36 is housed in the bearing section 27 with its notched surface 36a facing downwards (towards the opening of the bearing section 27), the notched surface 36a is on the same plane as the housing bottom surface 28a. Therefore, when the pivot shaft 36 is housed in the bearing section 27 with its notched surface 36a facing in any direction other than downwards, the outer circumference of the pivot shaft 36 protrudes slightly from the opening of the bearing section 27.

[0023] Here, the pivot shaft 36 is fitted into the shaft support hole portion 34c of the arms 34a and 34b such that the notched surface 36a faces downward when the first plate portions 34a1 and 34b1 of the arms 34a and 34b are housed in the first arm housing groove 26a, i.e., in the closed state. For this reason, in the closed state, the notched surface 36a abuts against the plate surface of the leaf spring 37 fixed to the housing bottom surface 28a (hereinafter, the portion of the leaf spring 37 that abuts against the bearing portion 27 is referred to as the "contact portion 37f"). In the leaf spring 37, the contact portion 37f and the spring-side screw hole 37c are provided along the front-rear direction (the direction of the long side of the plate surface), and two insertion portions 37d are provided on the opposite side of the contact portion 37f from the spring-side screw hole 37c.

[0024] In the tilt mechanism 30 configured as described above, as shown in Figures 8 and 9, when the arms 34a and 34b rotate from the closed state and the pivot shaft 36 rotates, a part of the outer circumference of the pivot shaft 36 protrudes from the opening of the bearing portion 27 facing the housing bottom surface 28a. As a result, the contact portion 37f of the leaf spring 37 is pressed against the outer circumference of the pivot shaft 36 and undergoes elastic deformation, and the pivot shaft 36 is pressed by its elastic restoring force (reaction force). Even when the leaf spring 37 is elastically deformed and bent, each insertion portion 37d of the leaf spring 37 does not come out of each insertion hole 28b1 but protrudes to the outside of the spring housing portion 28, and the bent state of the leaf spring 37 is maintained. In this way, when the pivot shaft 36 rotates, the pivot shaft 36 is pressed against the leaf spring 37, and the pivot shaft 36 is held between the leaf spring 37 and each bearing inclined surface 27a of the bearing portion 27. Therefore, the tilt mechanism 30 can transition from a closed state to an open state by rotating the arms 34a and 34b, and can hold the arms 34a and 34b at any angle. Thus, the projection device 10 equipped with the tilt mechanism 30 can be installed at any installation angle.

[0025] As shown in Figure 10, in the open state, the arms 34a and 34b can be held in a position where they stand at approximately a 90° angle to the lower surface 20b of the housing 20. When the arms 34a and 34b are rotated from the closed state, the connecting plate 35 of the arms 34a and 34b comes into contact with the mounting surface 60 according to the mounting angle. That is, the connecting plate 35 functions as a support part that contacts the mounting surface 60 and supports the projection device 10. In the open state, the first plate portion 34a1 comes into contact with the rear side surface of the first arm housing groove 26a, restricting the rotation of the arms 34a and 34b toward the rear (see Figure 9). Furthermore, if the connecting plate 35 is not attached to the arms 34a and 34b, or if the connecting plate 35 is positioned closer to the lower surface 20b of the housing 20 relative to the arms 34a and 34b compared to the configuration shown in Figure 10 (i.e., the connecting plate 35 does not contact the installation surface 60), when the arms 34a and 34b are rotated from the closed position, the arm contact portions 34a3 and 34b3 of the arms 34a and 34b contact the installation surface 60 according to the installation angle to support the projection device 10.

[0026] Furthermore, by changing the inclination angle of each bearing inclined surface 27a of the bearing section 27, the height position at which the pivot shaft 36 contacts each bearing inclined surface 27a is changed, and the dimension by which the outer circumference of the pivot shaft 36 protrudes from the opening of the bearing section 27 when the pivot shaft 36 rotates can be changed. In other words, by changing the inclination angle of each bearing inclined surface 27a, the force with which the pivot shaft 36 presses against the contact portion 37f of the leaf spring 37 can be adjusted. In addition, the force with which the leaf spring 37 presses against the pivot shaft 36 when the pivot shaft 36 rotates, i.e., the elastic restoring force (reaction force) of the leaf spring 37, can be easily adjusted by changing the thickness and length of the leaf spring 37, the degree to which the leaf spring 37 is screwed in by the spring fixing screw 50, the length of each slit 37b provided in the leaf spring 37, etc.

[0027] As described above, the projection device 10 according to this embodiment includes a housing 20, a pivot shaft 36 that rotates about an axis relative to the housing 20, a pair of arms 34a and 34b that extend radially from the pivot shaft 36 and rotate together with the pivot shaft 36 to support the housing 20 according to the installation angle of the housing 20 with respect to the installation surface 60, a bearing portion 27 provided in the housing 20 that houses the pivot shaft 36 so as to be rotatable about its axis, and a leaf spring 37 that slides against a part of the outer circumference of the rotating pivot shaft 36 and presses and holds the pivot shaft 36 when the installation angle is adjusted. The bearing portion 27 has a shape in which, in a cross-sectional view perpendicular to the axial direction of the pivot shaft 36 (a plane perpendicular to the axial direction and parallel to the left side surface 20c and right side surface 20d of the housing 20), the side with the leaf spring 37 is open and the side opposite to the leaf spring 37 gradually narrows.

[0028] In this embodiment, the projection device 10 has the above-described configuration, so that when the rotation of the pivot shaft 36, which rotates while sliding in contact with the leaf spring 37 within the bearing portion 27, is stopped (the rotation of the arms 34a and 34b is stopped), the pivot shaft 36 is held (clamped) by the elastic restoring force (reaction force) of the bearing portion 27 and the leaf spring 37, and both arms 34a and 34b extending from the pivot shaft 36 are held (clamped) at any rotational position. Therefore, the housing 20 can be set at any installation angle by both arms 34a and 34b by rotating the pivot shaft 36. In this way, a torque hinge mechanism can be realized with a compact and simple configuration consisting of the pivot shaft 36, the leaf spring 37, and the bearing portion 27.

[0029] Furthermore, in the projection device 10, because the bearing portion 27 has the shape described above, the area of ​​contact between the pivot shaft 36 and the bearing portion 27 when the pivot shaft 36 rotates is smaller compared to, for example, when the cross-section of the bearing portion 27 is formed in a substantially arc shape along the outer circumference of the pivot shaft 36. As a result, the frictional force generated between the pivot shaft 36 and the bearing portion 27 is small, making it easier for the pivot shaft 36 to rotate, and allowing the pivot shaft 36 to rotate smoothly until it reaches the desired rotation position. In this way, the projection device 10 can realize a tilt mechanism 30 that can be adjusted to the desired installation angle with a compact and simple configuration.

[0030] Furthermore, in the projection device 10, the shape of the bearing portion 27 is approximately V-shaped, with the side opposite to the leaf spring 37 being pointed, when viewed in cross-sectional view perpendicular to the axial direction of the pivot shaft 36 (a plane perpendicular to the axial direction and parallel to the left side 20c and right side 20d of the housing 20). As a result, in cross-sectional view of the bearing portion 27, the pivot shaft 36 contacts the bearing portion 27 at only two points (see Figure 7), thus providing a specific shape for the bearing portion 27 that reduces the frictional force generated between the pivot shaft 36 and the bearing portion 27. In addition, by providing recesses or notches in the bearing inclined surface 27a of the approximately V-shaped bearing portion 27, the pivot shaft 36 may be configured to rotate in stages.

[0031] Furthermore, in the projection device 10, a leaf spring 37 provided in the housing 20 presses against a portion of the outer circumference of the pivot shaft 36 due to its elastic restoring force. This provides a compact and simple specific configuration for holding the pivot shaft 36 at any desired rotation angle.

[0032] Furthermore, in the projection device 10, the pivot shaft 36 has a notched surface 36a in which a part of the outer circumference is cut out in a planar shape, and the notched surface 36a abuts the plate surface of the leaf spring 37. Because the notched surface 36a abuts the plate surface of the leaf spring 37 in this way, the surfaces overlap, making it difficult for the pivot shaft 36 to rotate, and thus restricting the rotation of the pivot shaft 36. This prevents the pivot shaft 36 from rotating unintentionally at the rotation angle in which the notched surface 36a and the plate surface of the leaf spring 37 abut. Note that the rotation angle of the pivot shaft 36 in which the notched surface 36a and the leaf spring 37 abut is not limited. In addition, the pivot shaft 36 may be provided with multiple notched surfaces 36a.

[0033] Furthermore, in the projection device 10, the notched surface 36a of the pivot shaft 36 is provided on the pivot shaft 36 so as to contact the plate surface of the leaf spring 37 when both arms 34a and 34b are closed against the lower surface 20b of the housing 20 (closed state). This restricts the rotation of the pivot shaft 36 in the closed state and prevents the pivot shaft 36 from unintentionally rotating when both arms 34a and 34b are subjected to impact or the like in the closed state. If multiple notched surfaces 36a are provided on the pivot shaft 36, for example, they may be adjusted so that the notched surfaces 36a and the leaf spring 37 contact each other in both the closed and open states. In this case, it is possible to prevent the pivot shaft 36 from unintentionally rotating due to impact or the like even in the open state.

[0034] Furthermore, in the projection device 10, the leaf spring 37 has a substantially rectangular surface, a contact portion 37f that abuts against the pivot shaft 36, and a spring-side screw hole 37c that is fixed to the housing 20. The contact portion 37f and the spring-side screw hole 37c are provided along the long side direction of the substantially rectangular surface of the leaf spring 37. By providing the contact portion 37f and the spring-side screw hole 37c along the long side direction of the surface of the leaf spring 37, which is more elastically deformable than the short side direction of the surface, it is possible to easily adjust the force with which the leaf spring 37 presses against the pivot shaft 36 when the pivot shaft 36 rotates.

[0035] Furthermore, in the projection device 10, the spring-side screw hole 37c is a part that is screwed to the housing 20, and the leaf spring 37 has a first positioning portion 37a1 between the spring-side screw hole 37c and the contact portion 37f that engages with a first positioning pin 41 provided on the housing 20, thereby restricting the rotation of the leaf surface around the screw axis of the spring fixing screw 50. This prevents the leaf spring 37 from rotating around the screw axis of the spring fixing screw 50 when, for example, the leaf spring 37 slides against the pivot shaft 36, and stabilizes the pressing force on the pivot shaft 36 by the leaf spring 37.

[0036] Furthermore, in the projection device 10, the leaf spring 37 has an insertion portion 37d that is inserted into the housing 20 on the opposite side of the spring-side screw hole 37c, with the contact portion 37f in between. The insertion portion 37d is inserted into an insertion hole 28b1 provided in the housing 20 along the long side direction of the substantially rectangular leaf spring 37, allowing movement of the plate surface in the long side direction while restricting movement in the short side direction. As a result, when the leaf spring 37 presses against the pivot shaft 36, the leaf spring 37 is allowed to elastically deform in the long side direction, while preventing displacement in the short side direction. Therefore, the pivot shaft 36 is effectively pressed by the leaf spring 37, and the arms 34a and 34b can be effectively held by the leaf spring 37.

[0037] Furthermore, when a pair of insertion portions 37d, which are provided along the short side direction of the roughly rectangular leaf spring 37, are inserted into the two insertion holes 28b1, the leaf spring 37 has a proximity portion 37e between the pair of insertion portions 37d that is close to the housing side 28b of the spring housing portion 28 (the housing side 28b on which the insertion holes 28b1 are provided). As a result, if the leaf spring 37 rotates around the screw axis of the spring fixing screw 50, the proximity portion 37e will interfere with the housing side 28b of the housing 20, thereby allowing the leaf spring 37 to be positioned more effectively.

[0038] Furthermore, in the projection device 10, the pivot shaft 36, arms 34a and 34b, bearing section 27, and leaf spring 37 are provided on both end edges that constitute opposite sides of the housing 20, and the pair of arms 34a and 34b have a connecting plate 35 that connects the pair of arms 34a and 34b. As a result, the arms 34a and 34b can support the housing 20 on both end edges that constitute opposite sides of the housing 20, and the housing 20 can be stably supported at any installation angle.

[0039] Furthermore, the projection device 10 has a projection opening 23a in the housing 20. This makes it possible to realize a projection device 10 that is compact and simple in configuration and can project at a desired installation angle.

[0040] (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to Figure 11. In the description of the second embodiment, the same configuration as in the first embodiment will be omitted or simplified. The projection device according to the second embodiment differs from the first embodiment in the configuration of the spring housing 128 and the leaf spring 137.

[0041] As shown in Figure 11, the spring housing portion 128 is provided with a bearing portion 27, a housing-side screw hole (not shown), and a first positioning pin 41, similar to the spring housing portion 28 in the first embodiment. On the other hand, the spring housing portion 128 does not have an insertion hole 37d on the rear side surface of the housing side surface 128b, and a second positioning pin (second protrusion) 42 is provided on the front side surface of the housing side surface 128b, approximately in the center in the left-right direction. The second positioning pin 42 protrudes in a pin shape from the housing bottom surface 128a adjacent to the housing side surface 128b, and has a roughly semicircular shape in plan view.

[0042] The leaf spring 137 has a shorter length dimension in the long side direction of its plate surface than the leaf spring 37 of the first embodiment. Like the leaf spring 37 of the first embodiment, the leaf spring 137 has a spring opening 137a, a first positioning portion 137a1, two slits 137b, a spring-side screw hole (located in a position overlapping with the spring fixing screw 50; not shown in Figure 11), and a contact portion 137f. On the other hand, the rear end of the leaf spring 137 is not provided with an insertion portion 37d and a proximity portion 37e, and the rear end of the leaf spring 137 is spaced apart from the housing side surface 128b and is a free end. Even with such a configuration, the pivot shaft 36 can be held at any rotation angle by adjusting the pressing force of the leaf spring 137 on the pivot shaft 36.

[0043] Furthermore, the leaf spring 137 is provided with a second positioning portion 137g, which is cut out in a roughly semi-circular shape and protrudes towards the rear along the outer circumference of the second positioning pin 42, approximately in the left-right direction center of the front end of its leaf surface. That is, the second positioning portion 137g is provided on the opposite side from the first positioning portion 137a1, with the spring-side screw hole in between. The second positioning portion 137g contacts the outer circumference of the second positioning pin 42 and engages with the second positioning pin 42. In this way, the first positioning portion 137a1 and the second positioning portion 137g, which are provided on either side of the spring-side screw hole, effectively restrict the rotation of the leaf spring 137 around the screw axis of the spring fixing screw 50, even if the leaf spring 137 has one end as a free end as in this embodiment, and the leaf spring 37 is positioned in the direction of its leaf surface.

[0044] The embodiments described above are presented as examples only 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 variations are included in the scope and gist of the invention, as well as in the claims of the invention and its equivalents. For example, in each of the above embodiments, a configuration in which the tilt mechanism is provided on the front part of the lower surface of the housing was illustrated, but the tilt mechanism may also be provided in the center of the lower surface of the housing in the front-to-back direction, or the like.

[0045] The invention described in the first claim of this application is listed below. [1] The enclosure and A shaft portion that rotates around the axis relative to the housing, A support portion extending radially from the shaft portion and rotating together with the shaft portion to support the housing according to the installation angle of the housing with respect to the installation surface, A bearing portion is provided in the housing and houses the shaft portion so as to be rotatable around its axis, and slides against a part of the outer circumference of the rotatable shaft portion, It comprises a retaining part that slides against a part of the outer circumference of the rotating shaft and presses against and holds the shaft when the installation angle is adjusted, The bearing portion has a shape in which, in a cross-sectional view perpendicular to the axial direction of the shaft portion, the side facing the holding portion is open and the side opposite to the holding portion gradually narrows. electronic equipment. [2] The bearing portion is roughly V-shaped in a cross-sectional view perpendicular to the axial direction of the shaft portion, with the side opposite to the holding portion being pointed. The electronic device described in [1] above. [3] The retaining part is a leaf spring provided in the housing, which presses a part of the outer circumference of the shaft by its elastic restoring force. The electronic device described in [1] or [2] above. [4] The shaft portion has a notched surface in which a part of the outer circumference is cut out in a planar shape, The notched surface is in surface contact with the plate surface of the leaf spring. The electronic device described in [3] above. [5] The bearing portion is provided on the lower side of the housing, The notched surface is provided on the shaft portion such that it contacts the leaf spring when the support portion is closed to the lower surface of the housing. The electronic device described in [4] above. [6] The leaf spring has a substantially rectangular surface and includes a contact portion that abuts against the shaft portion and a fixing portion that is fixed to the housing, The contact portion and the fixing portion are provided along the longer side direction of the plate surface of the leaf spring, which is shaped to be approximately rectangular. The electronic device described in [4] or [5] above. [7] The fixing part is a part that is screwed to the housing, The leaf spring has a first positioning portion between the fixing portion and the contact portion, which engages with a first protrusion provided on the housing to restrict the rotation of the plate surface around the screw axis of the screw. The electronic device described in [6] above. [8] The leaf spring has an insertion portion on the side opposite to the fixing portion, with the contact portion in between, which is inserted into the housing. The insertion portion is inserted into a hole provided in the housing along the longer side of the plate surface of the leaf spring, which is roughly rectangular in shape, and allows movement in the longer side direction of the plate surface while restricting movement in the shorter side direction. The electronic device described in [7] above. [9] The insertion portion is provided in a pair along the short-side direction of the plate surface of the leaf spring, which is roughly rectangular in shape. The leaf spring has a proximity portion between the pair of insertion portions that is close to the surface of the housing where the hole portion is provided. The electronic device described in [8] above.

[10] The leaf spring has a second positioning portion on the opposite side of the first positioning portion, with the fixing portion in between, which engages with a second protrusion provided on the housing, thereby restricting the rotation of the plate surface around the screw axis of the screw. The electronic device described in [7] above.

[11] The shaft portion, the support portion, the bearing portion, and the holding portion are each provided on the edges of opposite sides of the housing, Between the pair of support parts, there is a connecting part that connects the pair of support parts. The electronic device described in [3] above.

[12] The electronic device according to [3], wherein the housing is a projection device having a projection opening. [Explanation of symbols]

[0046] 10 Projection device 11 Projection port 20 Enclosure 20a Top View 20b Bottom surface 20c Left side 20d Right side 20e Front 20f Rear 21 Top case 22 Lower case 23 Front panel 23a Projection port opening 23b Air intake 23c Exhaust vent 24 Rear panel 25 Left panel 25a Air intake 25b Connection port 26a First arm housing groove 26b Second arm housing groove 27 Bearing section 27a Bearing inclined surface 27b Bearing side surface 28 Spring housing section 28a Housing bottom surface 28a1 Screw holes on the housing side 28b Side of the enclosure 28b1 Insertion hole 30 Tilt mechanism 32 Torque hinge section 34a Arm 34a1 1st plate part 34a2 2nd plate part 34a3 Arm contact part 34b Arm 34b1 1st plate part 34b2 2nd plate part 34b3 Arm contact portion 34c Axle support hole portion 35 Connecting plate 35a Rising section 36 Rotary shaft 36a Notch surface 37 Leaf spring 37a Spring opening 37a1 First positioning section 37b Slit 37c Spring-side screw hole 37d Insertion part 37e Proximity section 37f Contact section 40 Installation member 41 First positioning pin 42 Second positioning pin 50 Spring fixing screw 60 Installation surface 128 Spring housing 128a Storage bottom surface 128b Storage side surface 137 Leaf spring 137a Spring opening 137a1 First positioning section 137b Slit 137f Contact area 137g Second positioning area

Claims

1. The casing and A shaft portion that rotates around the axis relative to the housing, A support portion extending radially from the shaft portion and rotating together with the shaft portion to support the housing according to the installation angle of the housing with respect to the installation surface, A bearing portion provided in the housing and housing the shaft portion, A leaf spring that slides against a portion of the outer circumference of the rotating shaft and presses against and holds a portion of the shaft by elastic restoring force when the installation angle is adjusted, The bearing portion has a shape in which, in a cross-sectional view perpendicular to the axial direction of the shaft portion, the leaf spring side is open and the side opposite to the leaf spring gradually narrows. The aforementioned leaf spring has a substantially rectangular surface and a fixing portion that is fixed to the housing. A spring opening that opens in a substantially rectangular shape is provided near the fixing portion of the leaf spring. In the spring opening, the leaf spring has a pair of slits at both ends in the short-side direction of the leaf surface, each extending along the long-side direction and in the direction in which the fixing portion exists. electronic equipment.

2. The electronic device according to claim 1, wherein the bearing portion has a substantially V-shape in a cross-sectional view perpendicular to the axial direction of the shaft portion, with the side opposite to the leaf spring side being pointed.

3. The fixing portion in the leaf spring is provided between the pair of slits, The electronic device according to claim 1 or 2.

4. The shaft portion has a notched surface in which a part of the outer circumference is cut out in a planar shape. The notched surface is in surface contact with the plate surface of the leaf spring. The electronic device according to claim 3.

5. The bearing portion is provided on the lower side of the housing, The notched surface is provided on the shaft portion such that it contacts the leaf spring when the support portion is closed to the lower surface of the housing. The electronic device according to claim 4.

6. The leaf spring has a contact portion that contacts the shaft portion, The contact portion and the fixing portion are provided along the longer side direction of the plate surface of the leaf spring, which is shaped to be substantially rectangular. The spring opening is provided between the contact portion and the fixing portion. The electronic device according to claim 4.

7. The aforementioned fixing part is a part that is screwed to the housing, The leaf spring has a first positioning portion between the fixing portion and the contact portion, which engages with a first protrusion provided on the housing to restrict the rotation of the plate surface around the screw axis of the screw. The electronic device according to claim 6.

8. The leaf spring has an insertion portion on the side opposite to the fixing portion, with the contact portion in between, which is inserted into the housing. The insertion portion is inserted into a hole provided in the housing along the longer side of the substantially rectangular leaf spring, allowing movement of the leaf surface in the longer side direction while restricting movement in the shorter side direction. The electronic device according to claim 7.

9. The insertion portion is provided in pairs along the short-side direction of the plate surface of the leaf spring, which is roughly rectangular in shape. The leaf spring has a proximity portion between the pair of insertion portions that is close to the surface of the housing where the hole portion is provided. The electronic device according to claim 8.

10. The leaf spring has a second positioning portion on the opposite side of the fixing portion from the first positioning portion, which engages with a second protrusion provided on the housing, thereby restricting the rotation of the screw on the plate surface around the screw axis. The electronic device according to claim 7.

11. The shaft portion, the support portion, the bearing portion, and the leaf spring are each provided on the edges of opposite sides of the housing, Between the pair of support parts, there is a connecting part that connects the pair of support parts. The electronic device according to claim 3.

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