Head-up display

Abstract

To provide a head-up display which enables work for fixing a mirror to a housing to be conducted easily in a state that the mirror is rotatably supported by a bearing member.SOLUTION: A head-up display 100 includes: a mirror 140 having a mirror body 141 and a shaft part 142 set as a rotation axis AX1; a bearing member 160 which rotatably supports the shaft part 142 of the mirror 140; a torsion spring 170 through which the shaft part 142 penetrates and which biases the mirror 140 in a predetermined rotational direction in the rotation axis AX1 relative to the bearing member 160; and a housing 110 which houses the mirror 140, the bearing member 160, and the torsion spring 170. The torsion spring 170 is disposed on a side, which is opposite to the mirror 140, of the bearing member 160. The bearing member 160 has a protrusion 164 on which one end 171 of the torsion spring 170 is hung. The housing 110 has a recessed portion which is fitted in the bearing member 160 to fix the bearing member 160.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a head-up display having a mirror whose angle can be changed inside a housing. [Background technology]

[0002] Patent Document 1 discloses a head-up display in which a concave mirror that reflects display light is rotatably supported by a bearing member (support member). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-78966 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described head-up display, the work of fixing the mirror to the housing in a state in which the mirror is rotatably supported by the bearing member can be complicated.

[0005] Therefore, the present disclosure provides a head-up display that can easily fix the mirror to the housing while the mirror is rotatably supported by a bearing member. [Means for solving the problem]

[0006] A head-up display according to one aspect of the present disclosure includes a mirror body, a mirror having an axis serving as a rotation axis, a bearing member rotatably supporting the axis of the mirror, a torsion spring passing through the axis and biasing the mirror relative to the bearing member in a predetermined rotation direction about the rotation axis, and a housing accommodating the mirror, the bearing member, and the torsion spring, wherein the torsion spring is disposed on the opposite side of the bearing member from the mirror, the bearing member has a protrusion that protrudes from the opposite side and on which one end of the torsion spring is hooked, and the housing has a recess that fits into the bearing member to fix the bearing member. The bearing member further has a flat plate portion that protrudes greater than the height of the protrusion portion, the protrusion portion is disposed in a direction in which the flat plate portion extends, and the bearing member has a recess disposed between the protrusion portion and the flat plate portion. . [Effects of the Invention]

[0007] In the head-up display of the present disclosure, the mirror can be easily fixed to the housing while being rotatably supported by the bearing member. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of use of a head-up display according to an embodiment. [Figure 2] FIG. 2 is a diagram showing an area of ​​an image displayed by a head-up display according to an embodiment. [Figure 3] FIG. 3 is an exploded perspective view of the housing of the head-up display according to the embodiment, with an upper housing removed. [Figure 4] FIG. 4 is an exploded perspective view of the connection portion of the mirror to the lower housing. [Figure 5] FIG. 5 is a top view, a side view, and a perspective view of the connecting portion of the mirror to the lower housing. [Figure 6] FIG. 6 is a top view, a side view, and a perspective view of the connecting portion of the mirror to the lower housing. [Figure 7] FIG. 7 is a side view showing the first attitude in the initial state before the mirror rotates. [Figure 8]FIG. 8 is a side view showing the second attitude after the mirror has been rotated and the angle has been adjusted. [Figure 9] FIG. 9 is a perspective view of the bearing member and its surroundings with the upper housing removed. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. [Figure 12] FIG. 12 is an exploded perspective view of a connection portion of a mirror to a lower housing according to a modified example. [Figure 13] FIG. 13 is an enlarged perspective view of a connecting portion of a mirror according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Findings that formed the basis of this disclosure) The present inventors have found that the head-up displays described in the "Background Art" section have the following problems.

[0010] In the head-up display of Patent Document 1, the bearing member is fixed to the housing, so the mirror must be attached to the bearing member before the bearing member is attached to the housing, which can make the process of fixing the bearing member to the housing complicated.

[0011] In view of the above, there is a demand for a head-up display in which the mirror can be easily fixed to the housing while being rotatably supported by a bearing member.

[0012] Therefore, a head-up display according to one aspect of the present disclosure comprises a mirror body, a mirror having an axis that serves as a rotation axis, a bearing member that rotatably supports the axis of the mirror, a torsion spring that passes through the axis and urges the mirror relative to the bearing member in a predetermined rotational direction about the rotation axis, and a housing that houses the mirror, the bearing member, and the torsion spring, wherein the torsion spring is positioned on the opposite side of the bearing member from the mirror, the bearing member has a protrusion that protrudes on the opposite side and onto which one end of the torsion spring is hooked, and the housing has a recess that fits into the bearing member to secure the bearing member.

[0013] Therefore, a worker assembling a head-up display can easily attach the mirror to the housing in a state where it is rotatably supported by the bearing members by fitting the mirror, with the bearing members and torsion springs provided, into the recess of the housing. In other words, the worker can easily perform the work of fixing the mirror to the housing 110 in a state where the mirror is rotatably supported by the bearing members.

[0014] The height of the protrusion may be greater than the thickness of the one end of the torsion spring.

[0015] Therefore, one end of the torsion spring can remain hooked on the protrusion, reducing the likelihood of the one end of the torsion spring coming off the protrusion.

[0016] The bearing member may further have a flat plate portion that protrudes to a height greater than that of the protrusion.

[0017] Therefore, the rigidity of the bearing member can be improved, and the durability of the bearing member can be improved.

[0018] The protrusion may be disposed in a direction in which the flat plate extends, and the bearing member may have a recess disposed between the protrusion and the flat plate.

[0019] Therefore, one end of the torsion spring can be accommodated in the recess without generating any biasing force in the rotational direction on the torsion spring.

[0020] The portion between the recess and the protrusion may be inclined with respect to the axial direction of the shaft portion.

[0021] Therefore, when a worker performing assembly work moves one end of the torsion spring from the recess to hook it on the side opposite the recess of the protrusion, the end can be prevented from getting caught on the recess side of the protrusion, allowing the movement to be smooth.

[0022] The recess of the housing may be in close contact with the bearing member.

[0023] This makes it possible to eliminate the gap between the bearing member and the recessed portion of the housing, reducing vibration of the mirror and reducing image blurring.

[0024] The bearing member may be fixed to the recess by fitting a portion of the bearing member other than the flat plate portion into the recess.

[0025] Therefore, the portion of the bearing member other than the flat plate portion can be fixed in the recess.

[0026] The recess may also have a first portion that forms a first space into which the bearing member is fitted, and a second portion that forms a second space that is located below the first space and is smaller than the first space.

[0027] The housing may also have a first member and a second member that forms a space in the housing together with the first member, and the flat portion of the bearing member may be sandwiched between the first member and the second member.

[0028] In this way, the bearing member is fixed more firmly to the housing because the flat plate portion is sandwiched between the first member and the second member.

[0029] The bearing member may be fixed to the recess by a fastening member penetrating the flat plate portion and fixing the bearing member to the housing.

[0030] In this way, the bearing member is fixed to the housing with the flat plate portion penetrated by the fastening member, and is therefore more firmly fixed to the housing.

[0031] Furthermore, the mirror may further include a drive unit that generates power to rotate the mirror, and the mirror may have a gear member for transmitting the power from the drive unit to the shaft portion.

[0032] In this way, since the gear member can be attached to the mirror afterwards, the gear member can be easily applied to mirrors of other shapes and housings of other shapes.

[0033] The mirror may further include a switch that transitions to an on state when pressed, and the gear member may have a protrusion that presses the switch when the mirror is in the rotation start position.

[0034] Therefore, when the switch is in the on state, it can be detected that the mirror is in the first position.

[0035] In addition, the torsion spring may further function as a compression spring, and the head-up display may further include a regulating member fixed to the end of the shaft portion, which, together with the bearing member, sandwiches the torsion spring and compresses it to regulate the extension of the torsion spring.

[0036] In this way, the restricting member restricts the torsion spring to a compressed state, thereby restricting the position of the mirror in the direction of the rotation axis. Because the position of the mirror in the direction of the rotation axis is restricted by the torsion spring being biased in the direction of the rotation axis, when the head-up display vibrates, it is possible to reduce the transmission of the impact caused by the vibration from the housing to the axis of the mirror.

[0037] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that each of the embodiments described below represents a specific example of the present disclosure. The numerical values, shapes, materials, components, component placement and connection configurations, steps, and step order shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in an independent claim that represents a superordinate concept will be described as optional components.

[0038] (Embodiment) [1. Example of using a head-up display] First, a usage example and a schematic configuration of a head-up display 100 according to the present embodiment will be described with reference to Figures 1 and 2. Figure 1 is a diagram showing a usage example of the head-up display 100 according to the present embodiment. Figure 2 is a diagram showing a display area of ​​an image displayed by the head-up display 100 according to the present embodiment.

[0039] The head-up display 100 in this embodiment is configured as an in-vehicle head-up display (HUD), and is attached near the top surface of a dashboard 301 of a vehicle 300.

[0040] The head-up display 100 projects light onto an area D1 of a windshield (front glass) 302, which is a display medium. The projected light is reflected by the windshield 302. This reflected light is directed toward the eyes of the driver sitting in the driver's seat, who is the user of the head-up display 100. The driver perceives the reflected light that has entered their eyes as a virtual image I1 that appears on the opposite side of the windshield 302 (outside the vehicle) against the background of actual objects visible through the windshield 302. In this embodiment, this series of events is expressed as the head-up display 100 displaying the virtual image I1 using the windshield 302.

[0041] FIG. 2 is a diagram showing an example of an area D1 onto which light is projected by the head-up display 100 according to the present embodiment.

[0042] 2, the head-up display 100 attached to the dashboard 301 projects light onto, for example, an area D1 (area surrounded by a dashed line in the figure) located on the lower side of the driver's seat of the windshield 302. This causes a virtual image I1 (see FIG. 1) to be displayed, which can be seen on the opposite side of the windshield 302 (outside the vehicle) from the driver sitting in the driver's seat.

[0043] [2. Head-up display configuration] Next, the configuration of the head-up display 100 will be described with reference to Figures 1 and 3. Figure 3 is an exploded perspective view of the head-up display 100 according to this embodiment, with the upper housing removed.

[0044] In Figure 3 and subsequent figures, the vertical direction is defined as the Z-axis direction, the direction of travel of the vehicle and perpendicular to the Z-axis direction is defined as the X-axis direction, and the direction perpendicular to the Z-axis and X-axis directions (left-right direction of the vehicle) is defined as the Y-axis direction.

[0045] 1, the head-up display 100 includes a housing 110, a mirror 130, a mirror 140, and a liquid crystal module 200. Also, as shown in FIG. 3, the head-up display 100 includes various components for connecting the mirror 140 to the housing 110, and a drive unit 190.

[0046] The housing 110 includes an upper housing 111 constituting the upper part of a box having a generally rectangular parallelepiped shape elongated in the Y-axis direction and with an opening 114 formed at the top, a lower housing 112 constituting the inner part of the box, and a transparent cover 113 covering the opening 114 of the upper housing 111. The upper housing 111 and the lower housing 112 together form a space S1 of the housing 110. The upper housing 111 is an example of a first member, and the lower housing 112 is an example of a second member. The housing 110 houses a mirror 130, a mirror 140, and a liquid crystal module 200. The housing 110 is made of, for example, resin, but may also be made of metal.

[0047] Mirror 130 is a mirror that reflects the image projected by liquid crystal module 200. Mirror 140 further reflects the image reflected by mirror 130 and projects the reflected image outside head-up display 100 through opening 114. Specifically, the image reflected by mirror 140 is projected onto windshield 302. In this embodiment, mirrors 130 and 140 are rectangular plate-shaped members that are long in the Y-axis direction. Mirrors 130 and 140 are made of, for example, resin, metal, or the like.

[0048] The driving unit 190 generates power to rotate the mirror 140. Specifically, the driving unit 190 is, for example, a motor that applies power to the mirror 140 to change the angle of the mirror 140. The rotation shaft of the driving unit 190 and the rotation shaft of the mirror 140 are connected by a power transmission member. The power from the driving unit 190 is transmitted to the mirror 140 via the power transmission member. In this embodiment, the power transmission member is a gear. The power transmission member is not limited to a gear and may be a belt.

[0049] Liquid crystal module 200 is an example of an image generating unit that projects an image by irradiating a liquid crystal panel with light from a light source. In this embodiment, liquid crystal module 200 is configured to be entirely housed in housing 110, but it may also be configured to be partly housed in housing 110, or to be disposed outside housing 110.

[0050] [3. Configuration of the connection part of mirror 140] Next, the configuration of the connection portion of mirror 140 to lower housing 112 will be described with reference to Figures 3 and 4. Figure 4 is an exploded perspective view of the connection portion of mirror 140 to lower housing 112.

[0051] As shown in FIGS. 3 and 4, the mirror 140 is supported by the supports 115 and 116 of the lower housing 112 so as to be rotatable about a rotation axis AX1 that is parallel to the Y-axis direction.

[0052] The mirror 140 has a mirror body 141 and shaft portions 142 and 143 that form the rotation axis AX1 of the mirror body 141. The mirror body 141 is a rectangular plate-shaped member that is long in the Y-axis direction, and is a portion on whose surface a mirror is provided. The shaft portion 142 is a cylindrical portion that protrudes in the negative Y-axis direction from the end face of the mirror body 141 on the negative Y-axis direction. The shaft portion 143 is a cylindrical portion that protrudes in the positive Y-axis direction from the end face of the mirror body 141 on the positive Y-axis direction. The shaft portions 142 and 143 are arranged on the rotation axis AX1 and are portions that support the mirror body 141 so that it can rotate freely about the rotation axis AX1.

[0053] The shaft portion 142 is supported by a support portion 115 of the lower housing 112, and the shaft portion 143 is supported by a support portion 116 of the lower housing 112. The shaft portion 142 is provided with a gear member 150, a bearing member 160, a torsion spring 170, and a restricting member 180.

[0054] The gear member 150 is a member provided between the shaft portion 142 and the drive portion 190, and is a member for transmitting power from the drive portion 190 to the shaft portion 142. The gear member 150 has a fixed portion 151 fixed to the shaft portion 142, and a gear portion 152 that receives power from the drive portion 190. The gear member 150 is fixed to the shaft portion 142 by fastening a fastening member 155 that passes through the shaft portion 142 to the fixed portion 151. The gear member 150 may further have a hole 153 to which an end of the torsion spring 170 is fixed. The gear member 150 may further have a protrusion 154. The function of the protrusion 154 will be described later.

[0055] The bearing member 160 is a member that rotatably supports the shaft portion 142 of the mirror 140. The bearing member 160 has a bearing body 161 having a through-hole 162 through which the shaft portion 142 passes, and a flat plate portion 163 that is parallel to the rotation axis AX1. The through-hole 162 may be surrounded by a cylindrical portion that protrudes from the bearing body 161 on the negative side in the Y-axis direction. The flat plate portion 163 is parallel to the XY plane and is disposed at the upper end of the bearing body 161. The flat plate portion 163 is a rectangular plate-shaped portion that is long in the X-axis direction.

[0056] Furthermore, bearing member 160 has a protrusion 164 that protrudes toward the negative side in the Y axis direction, that is, toward the opposite side of bearing member 160 from mirror body 141 of mirror 140. Protrusion 164 is a portion on which one end 171 of torsion spring 170 is hooked. Protrusion 164 is disposed in the direction in which flat plate portion 163 extends, that is, in the direction in which an XY plane passes through flat plate portion 163 and is parallel to flat plate portion 163. Note that flat plate portion 163 protrudes toward the negative side in the Y axis direction by a distance greater than the height of protrusion 164. In other words, the amount of protrusion of flat plate portion 163 toward the negative side in the Y axis direction from bearing body 161 is greater than that of protrusion 164.

[0057] Moreover, bearing member 160 further has a recess 165 disposed between flat plate portion 163 and protruding portion 164. Flat plate portion 163 and protruding portion 164 have portions that protrude from bearing body 161 toward the negative Y-axis direction. In other words, recess 165 is a portion that protrudes less from bearing body 161 toward the negative Y-axis direction than flat plate portion 163 and protruding portion 164. Note that recess 165 may be a portion that protrudes zero amount from bearing body 161 toward the negative Y-axis direction.

[0058] The flat plate portion 163 also has a through hole 166. The function of the through hole 166 will be described later.

[0059] Torsion spring 170 is passed through shaft portion 142 and is disposed on the opposite side of bearing member 160 from mirror body 141 of mirror 140. One end 171 of torsion spring 170 is hooked onto and fixed to protrusion 164, and the other end 172 is fixed to hole 153 of gear member 150. When one end 171 and the other end 172 approach each other in the circumferential direction of a circle centered on rotation axis AX1, torsion spring 170 generates a repulsive force in a direction moving the gear member 150 and bearing member 160 away from each other in the circumferential direction. In other words, torsion spring 170 generates a biasing force in a rotational direction that moves the gear member 150 and bearing member 160 away from each other in the rotational direction of rotation axis AX1.

[0060] The torsion spring 170 may also function as a compression spring. That is, when the portion of the coil that passes through the shaft portion 142 is compressed in the Y-axis direction, the torsion spring 170 generates a repulsive force in the expanding direction.

[0061] The restricting member 180 is fixed to the end of the shaft portion 142 on the negative side in the Y-axis direction, and restricts the extension of the torsion spring 170 while sandwiching and compressing the torsion spring 170 together with the bearing member 160. The restricting member 180 has a plate-like shape that expands in a direction perpendicular to the rotation axis AX1 of the shaft portion 142 and away from the shaft portion 142. The restricting member 180 is provided at a position overlapping at least a portion of the torsion spring 170 in the Y-axis direction.

[0062] In this way, restricting member 180 restricts torsion spring 170 to a compressed state, thereby restricting the position of mirror 140 in the direction of rotation axis AX1. Since the position of mirror 140 in the direction of rotation axis AX1 is restricted by being biased in the direction of rotation axis AX1 by torsion spring 170, when head-up display 100 vibrates, it is possible to reduce the transmission of impact due to the vibration from housing 110 to shaft portion 142 of mirror 140.

[0063] Here, a method for fixing the torsion spring 170 will be described with reference to FIGS.

[0064] 5 and 6 are a top view, a side view, and a perspective view of the connection portion of the mirror 140 to the lower housing 112. Fig. 5 shows the state before one end 171 of the torsion spring 170 is hung on the protrusion 164 of the bearing member 160, and Fig. 6 shows the state after the one end 171 has been hung on the protrusion 164. In Figs. 5 and 6, (a) is a top view, (b) is a side view, and (c) is a perspective view.

[0065] As shown in FIG. 5, with the gear member 150, bearing member 160, torsion spring 170, and regulating member 180 assembled to the shaft portion 142, one end 171 of the torsion spring 170 is disposed in the recess 165 of the bearing member 160. In this state, the one end 171 of the torsion spring 170 is moved from the position of the recess 165 to the positive side of the protrusion 164 in the X-axis direction. As a result, as shown in FIG. 6, the one end 171 of the torsion spring 170 is hooked onto and fixed to the position on the positive side of the protrusion 164 in the X-axis direction. In other words, the one end 171 and the other end 172 of the torsion spring 170 are fixed in a state where they are close to each other in the circumferential direction around the shaft portion 142. Therefore, the torsion spring 170 biases the gear member 150 in a clockwise rotational direction relative to the bearing member 160, as shown in FIG. 6(b). Because gear member 150 is fixed to shaft portion 142 of mirror 140, torsion spring 170 biases mirror 140 in a clockwise rotational direction relative to bearing member 160. Therefore, an operator can easily set torsion spring 170 a state in which it applies a rotational biasing force between bearing member 160 and mirror 140 by simply moving one end 171 of torsion spring 170 from recess 165 to the positive side of protrusion 164 in the X-axis direction and hooking it onto protrusion 164. This improves work efficiency.

[0066] In bearing member 160, portion 167 between recess 165 and protrusion 164 is inclined with respect to axial direction AX1 of shaft portion 142. Therefore, when an assembly worker moves one end 171 of torsion spring 170 from recess 165 to the positive side of protrusion 164 in the X axis direction, the worker can prevent one end 171 from getting caught on the negative side of protrusion 164 in the X axis direction, allowing for smooth movement.

[0067] Furthermore, in bearing member 160, the height of protrusion 164 (i.e., the amount of protrusion of protrusion 164 from bearing body 161 toward the negative side in the Y-axis direction) is greater than the thickness of one end 171 of torsion spring 170. Therefore, one end 171 of torsion spring 170 can remain hooked on protrusion 164, and the likelihood of one end 171 of torsion spring 170 coming off protrusion 164 can be reduced.

[0068] Next, the effect of applying a biasing force between the bearing member 160 and the mirror 140 and the gear member 150 by the torsion spring 170 will be described with reference to FIGS.

[0069] Fig. 7 is a side view showing a first posture in an initial state before the mirror 140 rotates, and Fig. 8 is a side view showing a second posture in a state after the mirror 140 has rotated and the angle has been adjusted.

[0070] The first posture of the mirror 140 in its initial state is parallel to a direction DI11 at an angle θ1 with respect to the horizontal direction DI1. The second posture of the mirror 140 after adjustment is parallel to a direction DI12 at an angle θ2 with respect to the horizontal direction DI1.

[0071] 7 and 8, the side surface (tooth surface) of each tooth of gear portion 152 of gear member 150 on the right rotation direction side is maintained in contact with the side surface (tooth surface) of each tooth of gear 191 of drive unit 190 on the left rotation direction side. Therefore, whether mirror 140 is in the first position or the second position, the tooth surface of gear portion 152 is maintained in contact with the tooth surface of gear 191 of drive unit 190, thereby reducing rattling of mirror 140.

[0072] The function of the convex portion 154 of the gear member 150 will be described with reference to FIGS.

[0073] As shown in FIG. 7, when the mirror 140 is in the first position, which is the initial state, the protrusion 154 presses the switch 156. The switch 156 is fixed to the lower housing 112, for example, as shown in FIG. 9. The switch 156 transitions to an ON state when pressed, and transitions to an OFF state when the pressed state is released. The switch 156 is, for example, a tactile switch. For example, when the switch 156 is in the ON state, the control unit (not shown) can determine that the position of the mirror 140 is the first position. Furthermore, as shown in FIG. 8, when the mirror 140 is in the second position, the protrusion 154 moves away from the switch 156. Therefore, for example, when the switch 156 is in the OFF state, the control unit can determine that the position of the mirror 140 is not the first position. Therefore, the control unit can easily determine that the position of the mirror 140 is the first position when the switch 156 is in the ON state.

[0074] Next, the connection between the bearing member 160 and the lower housing 112 will be described with reference to Figs. 9 to 11. Fig. 9 is a perspective view of the periphery of the bearing member 160 with the upper housing 111 removed. Fig. 10 is a cross-sectional view taken along line XX in Fig. 9. Specifically, Fig. 10 is a cross-sectional view of the head-up display 100, excluding the upper housing 111, cut along the XY plane passing through the rotation axis AX1. Fig. 11 is a cross-sectional view taken along line XI-XI in Fig. 10. Specifically, Fig. 11 is a cross-sectional view of the head-up display 100 cut along the XZ plane passing through the center of the bearing body 161 of the bearing member 160 in the Y-axis direction.

[0075] As shown in these figures, the support portion 115 is configured as a recess (groove portion) into which the bearing body 161 of the bearing member 160, i.e., the portion of the bearing member 160 excluding the flat plate portion 163, fits. The recess that is the support portion 115 fits into the bearing body 161, thereby fixing the bearing member 160 to the lower housing 112. The recess that is the support portion 115 is in close contact with the bearing body 161 of the bearing member 160. Specifically, the width of the recess that is the support portion 115 in the Y-axis direction and the width of the bearing body 161 in the Y-axis direction are width W1, and are equal to each other. Furthermore, the width of the recess that is the support portion 115 in the X-axis direction and the width of the bearing body 161 in the X-axis direction are width W2, and are equal to each other. Note that the bearing body 161 may be press-fitted into the recess of the support portion 115, or there may be zero clearance between the bearing body 161 and the recess of the support portion 115. This makes it possible to eliminate the gap between bearing member 160 and support portion 115 of lower housing 112, reducing vibration of mirror 140 and reducing image display blur.

[0076] As shown in FIG. 11 , the support section 115 has a first portion 115a that defines a first space S11 into which the bearing body 161 of the bearing member 160 is fitted, and a second portion 115b that is provided below the first space S11 and defines a second space S12 that is smaller than the first space S11. The second space S12 has a width in the X-axis direction smaller than that of the first space S11. The second space S12 is a space through which the hole 153 of the gear member 150 and the other end 172 of the torsion spring 170 can pass. The second space S12 is formed within a range in which the hole 153 of the gear member 150 and the other end 172 of the torsion spring 170 move as the angle of the mirror 140 is changed. Because the width of the second space S12 is smaller in the X-axis direction than that of the first space, a wall can be provided from the outer wall of the lower housing 112 on the negative side in the X-axis direction to the second space S12, thereby improving the rigidity of the lower housing 112.

[0077] Furthermore, bearing member 160 is fixed to housing 110 by sandwiching flat plate portion 163 between upper housing 111 and lower housing 112. Furthermore, bearing member 160 is fixed to the recess of support portion 115 by fastening member 117 penetrating flat plate portion 163 and fixing bearing member 160 to housing 110. Fastening member 117 passes through through-hole 166 of flat plate portion 163. Fastening member 117 is, for example, a screw.

[0078] In this way, bearing member 160 can be more firmly fixed to housing 110 because flat plate portion 163 is sandwiched between upper housing 111 and lower housing 112. Furthermore, bearing member 160 is fixed to housing 110 with flat plate portion 163 penetrated by fastening member 117, so bearing member 160 is more firmly fixed to housing 110.

[0079] The fastening member 117 is located outside the housing 110 and close to the outer wall of the housing 110, passes through the lower housing 112 and the flat plate portion 163 of the bearing member 160, and is fixed to the hole 111a of the upper housing 111.

[0080] [4. Effects etc.] The head-up display 100 according to this embodiment includes a mirror 140, a bearing member 160, a torsion spring 170, and a housing 110. The mirror 140 has a mirror main body 141 and a shaft portion 142 that serves as a rotation axis AX1. The bearing member 160 rotatably supports the shaft portion 142 of the mirror 140. The torsion spring 170 is passed through the shaft portion 142 and biases the mirror 140 relative to the bearing member 160 in a predetermined rotation direction about the rotation axis AX1. The housing 110 accommodates the mirror 140, the bearing member 160, and the torsion spring 170. The torsion spring 170 is disposed on the opposite side of the bearing member 160 from the mirror 140. The bearing member 160 has a protrusion 164 that protrudes from the bearing member 160 from the mirror 140 and on which one end 171 of the torsion spring 170 is hooked. The housing 110 has a recess (support portion 115) that fits with the bearing member 160 and fixes the bearing member 160 in place.

[0081] Therefore, a worker assembling the head-up display 100 can easily attach the mirror 140 to the housing 110 in a state where the mirror 140 is rotatably supported by the bearing member 160 by fitting the mirror 140, to which the bearing member 160 and the torsion spring 170 are provided, into the recess of the support portion 115 of the housing 110. In other words, the worker can easily perform the work of fixing the mirror 140 to the housing 110 in a state where the mirror 140 is rotatably supported by the bearing member 160.

[0082] Furthermore, in the head-up display 100, the height of the protrusion 164 is greater than the thickness of one end of the torsion spring 170. Therefore, the one end 171 of the torsion spring 170 can remain hooked on the protrusion 164, and the one end 171 of the torsion spring 170 can be reduced from coming off the protrusion 164.

[0083] Moreover, in the head-up display 100, the bearing member 160 further has a flat plate portion 163 that protrudes greater than the height of the protrusion 164. Therefore, the rigidity of the bearing member 160 can be improved, and the durability of the bearing member 160 can be improved.

[0084] Furthermore, in the head-up display 100, the protrusion 164 is disposed in the direction in which the flat plate portion 163 extends. The bearing member 160 has a recess 165 disposed between the protrusion 164 and the flat plate portion 163. Therefore, one end 171 of the torsion spring 170 can be accommodated in the recess 165 without generating a biasing force on the torsion spring 170 in the rotational direction.

[0085] Furthermore, in the head-up display 100, a portion 167 between the recess 165 and the protrusion 164 is inclined with respect to the axial direction AX1 of the shaft 142. Therefore, when an assembly worker moves one end 171 of the torsion spring 170 from the recess 165 to the positive side in the X-axis direction of the protrusion 164, the worker can prevent the one end 171 from getting caught on the negative side in the X-axis direction of the protrusion 164, and can move it smoothly.

[0086] Furthermore, in the head-up display 100, the recessed portion of the support portion 115 of the housing 110 is in close contact with the bearing member 160. This makes it possible to eliminate the gap between the bearing member 160 and the support portion 115 of the lower housing 112, thereby reducing vibration of the mirror 140 and reducing blurring of the image display.

[0087] In the head-up display 100, the bearing member 160 is fixed to the recessed portion of the support portion 115 by fitting the portion of the bearing member 160 excluding the flat plate portion 163 into the recessed portion of the support portion 115. Therefore, the bearing body 161 of the bearing member 160 can be fixed to the recessed portion.

[0088] In addition, in the head-up display 100, the recess of the support portion 115 has a first portion 115a that forms a first space S11 into which the bearing member 160 is fitted, and a second portion 115b that is provided below the first space S11 and forms a second space S12 that is smaller than the first space S1.

[0089] Furthermore, in the head-up display 100, the housing 110 has an upper housing 111 and a lower housing 112 that, together with the upper housing 111, forms a space S1 of the housing 110. A flat plate portion 163 of the bearing member 160 is sandwiched between the upper housing 111 and the lower housing 112. In this way, the bearing member 160 is fixed to the housing 110 more firmly because the flat plate portion 163 is sandwiched between the upper housing 111 and the lower housing 112.

[0090] Furthermore, in the head-up display 100, the bearing member 160 is further fixed to the recess of the support portion 115 by having the flat plate portion 163 penetrated by the fastening member 117 and fixed to the housing 110. In this way, the bearing member 160 is fixed to the housing 110 with the flat plate portion 163 penetrated by the fastening member 117, and therefore is fixed to the housing 110 more firmly.

[0091] The head-up display 100 further includes a drive unit 190 that generates power to rotate the mirror 140. The mirror 140 has a gear member 150 for transmitting the power from the drive unit 190 to the shaft unit 142. In this way, since the gear member 150 can be attached to the mirror 140 afterward, the gear member 150 can be easily applied to mirrors of other shapes or housings of other shapes.

[0092] The head-up display 100 further includes a switch 156 that transitions to an on state when pressed. The gear member 150 has a protrusion 154 that presses the switch 156 when the mirror 140 is in a position to start rotation, i.e., the first position. Therefore, the control unit can easily determine that the mirror 140 is in the first position when the switch 156 is in the on state.

[0093] Furthermore, in the head-up display 100, the torsion spring 170 also functions as a compression spring. The head-up display 100 further includes a restricting member 180. The restricting member 180 is fixed to an end of the shaft portion 142, and restricts the torsion spring 170 from expanding while sandwiching it together with the bearing member 160 and compressing it. In this way, the restricting member 180 restricts the torsion spring 170 to a compressed state, so that the position of the mirror 140 in the direction of the rotation axis AX1 can be restricted. Since the torsion spring 170 is biased in the direction of the rotation axis AX1, the position of the mirror 140 in the direction of the rotation axis AX1 is restricted, so that when the head-up display 100 vibrates, the transmission of the impact due to the vibration from the housing 110 to the shaft portion 142 of the mirror 140 can be reduced.

[0094] [5. Modifications] In the above embodiment, mirror 140 is configured to receive power from drive unit 190 via gear member 150 attached to shaft 142, but this is not limiting. For example, as shown in Figs. 12 and 13, gear member 150A may be provided below mirror 140A. Fig. 12 is an exploded perspective view of a connection portion of mirror 140A to a lower housing according to a modified example. Fig. 13 is an enlarged perspective view of the connection portion of mirror 140A according to a modified example.

[0095] As shown in these figures, mirror 140A has mirror body 141A, shaft 142A, hole 143A, and mounting portion 144A. Mirror body 141A is the same as mirror body 141. Shaft 142A is a cylindrical portion that protrudes outward in the longitudinal direction from the outer end face of mirror body 141A. As in the embodiment, bearing member 160A, torsion spring 170, and regulating member 180 are attached to shaft 142A.

[0096] One end 171 of the torsion spring 170 is hooked onto the protrusion 164A of the bearing member 160A, and the other end 172 is fixed to a hole 143A provided in the mirror main body 141A. The restricting member 180 is fixed to the end of the shaft portion 142A, with the bearing member 160A and the torsion spring 170 passing through the shaft portion 142A.

[0097] Gear member 150A has a fixed portion 151A that fits into mounting portion 144A, and a gear portion 152A. Fixed portion 151A is fitted into mounting portion 144A and fixed. Gear portion 152A receives power from drive unit 190A. As shown in FIG. 13, gear member 150A presses switch 156A when mirror 140A is in the first position, which is the initial state. Therefore, similar to the embodiment, it can be easily detected that mirror 140A is in the first position.

[0098] In this way, even if the gear member 150A is provided below the mirror 140A, it is possible to achieve the same function as in the embodiment.

[0099] While head-up displays according to one or more aspects of the present disclosure have been described above based on the embodiments, the present disclosure is not limited to these embodiments. As long as they do not deviate from the spirit of the present disclosure, various modifications conceivable by those skilled in the art to the present embodiments and configurations constructed by combining components of different embodiments may also be included within the scope of one or more aspects of the present disclosure. [Industrial Applicability]

[0100] The present disclosure is useful as a head-up display or the like that can easily fix a mirror to a housing while the mirror is rotatably supported by a bearing member. [Explanation of symbols]

[0101] 100 Head-Up Display 110 Case 111 Upper housing 111a, 153 holes 112 Lower housing 113 Transparent Cover 114 Opening 115, 116 Support part 115a Part 1 115b Part 2 117, 155 Fastening members 130, 140, 140A mirror 141, 141A mirror body 142, 143, 142A shaft part 150, 150A gear parts 151, 151A fixed part 152, 152A gear section 154 Convex part 160, 160A bearing material 161 Bearing body 162, 166, 162A through hole 163 Flat plate part 164, 164A protrusion 165 depression 167 parts 170 Torsion spring 171 one end 172 other end 180 Regulatory Members 190 Drive Unit 191 gears 200 LCD module 300 vehicles 301 Dashboard 302 Windshield AX1 Rotation Axis I1 Virtual image D1 area DI1 horizontal direction DI11, DI12 direction S1 space S11 1st space S12 2nd space W1, W2 width θ1, θ2 angle

Claims

1. a mirror having a mirror body and an axis portion serving as a rotation axis; a bearing member that rotatably supports the shaft portion of the mirror; a torsion spring that passes through the shaft portion and biases the mirror relative to the bearing member in a predetermined rotation direction about the rotation shaft; a housing that houses the mirror, the bearing member, and the torsion spring, the torsion spring is disposed on the opposite side of the bearing member from the mirror, the bearing member has a protrusion that protrudes to the opposite side and on which one end of the torsion spring is hooked, the housing has a recess that fits into the bearing member to fix the bearing member, The bearing member further has a flat plate portion that protrudes to a height greater than the height of the protrusion portion, the protrusion is disposed in a direction in which the flat plate portion extends, The bearing member has a recess disposed between the protrusion and the flat plate portion. Head-up display.

2. The height of the protrusion is greater than the thickness of the one end of the torsion spring. The head-up display according to claim 1 .

3. The portion between the recess and the protrusion is inclined with respect to the axial direction of the shaft portion. The head-up display according to claim 1 or 2.

4. The recess of the housing is in close contact with the bearing member. The head-up display according to any one of claims 1 to 3.

5. The bearing member is fixed to the recess by fitting a portion of the bearing member other than the flat plate portion into the recess. The head-up display according to any one of claims 1 to 3.

6. The recess has a first portion that forms a first space in which the bearing member is fitted, and a second portion that forms a second space that is provided below the first space and is smaller than the first space. The head-up display according to any one of claims 1 to 5.

7. the housing has a first member and a second member that forms a space of the housing together with the first member, The flat plate portion of the bearing member is sandwiched between the first member and the second member. The head-up display according to any one of claims 1 to 3.

8. The bearing member is further fixed to the recess by a fastening member penetrating the flat plate portion and fixing the bearing member to the housing. The head-up display according to claim 7.

9. moreover, a drive unit that generates power to rotate the mirror, The mirror has a gear member for transmitting power from the drive unit to the shaft unit. A head-up display according to any one of claims 1 to 8.

10. moreover, It has a switch that transitions to the on state when pressed, The gear member has a protrusion that pushes in the switch when the mirror is in a rotation start position. The head-up display according to claim 9.

11. The torsion spring further functions as a compression spring, The head-up display further comprises: a restricting member fixed to an end of the shaft portion, sandwiching the torsion spring together with the bearing member and restricting the torsion spring from expanding in a compressed state; A head-up display according to any one of claims 1 to 10.

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