Head-up display

Abstract

The present invention provides a head-up display. The head-up display (100) includes: a reflector (140) having a reflector body (141) and a shaft portion (142) that serves as a rotation axis (AX1); a bearing member (160) supporting the shaft portion of the reflector (140) for rotational flexibility; a torsion spring (170) fitted over the shaft portion (142) and applying force to the reflector (140) relative to the bearing member (160) in a predetermined rotational direction of the rotation axis; and a housing (110) housing the reflector (140), the bearing member (160), and the torsion spring (170), the torsion spring (170) being disposed on the side of the bearing member (160) opposite to the reflector (140), the bearing member (160) having a protrusion (164) for engaging one end (171) of the torsion spring (170), and the housing (110) having a recess that engages with the bearing member to fix the bearing member.

Description

Technical Field

[0001] This disclosure relates to a head-up display having a reflector with an angle that can be changed inside the housing. Background Technology

[0002] Patent document 1 discloses a head-up display in which a concave mirror (reflector) that reflects display light is supported by a bearing member (support member) and rotates freely.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-78966 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] However, in the head-up display described above, the operation of fixing the reflector to the housing in a rotatable state supported by bearing components becomes more complicated.

[0008] Therefore, this disclosure provides a head-up display that allows for easy operation of fixing a reflector to a housing in a rotatable state by means of a bearing member.

[0009] Solution for solving the problem

[0010] A head-up display disclosed herein includes: a reflector having a reflector body and a shaft serving as a rotation axis; a bearing member supporting the shaft of the reflector for rotational flexibility; a torsion spring fitted around the shaft and applying force to the reflector relative to the bearing member in a predetermined rotational direction relative to the rotation axis; and a housing housing the reflector, the bearing member, and the torsion spring, the torsion spring being disposed on the side of the bearing member opposite to the reflector, the bearing member having a protrusion that protrudes toward the side of the bearing member opposite to the reflector for engaging one end of the torsion spring, and the housing having a recess that engages with the bearing member to secure the bearing member.

[0011] The effects of the invention

[0012] The head-up display disclosed herein can be easily fixed to the housing by means of a reflector supported by a bearing member in a rotatable state. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating an example of the use of a head-up display in an embodiment.

[0014] Figure 2This is a diagram showing the area of ​​the image displayed by the head-up display of the embodiment.

[0015] Figure 3 This is an exploded perspective view of the head-up display housing of the embodiment, with the upper housing removed.

[0016] Figure 4 This is an exploded perspective view of the connection between the reflector and the lower housing.

[0017] Figure 5 These are top views, side views, and perspective views of the connection between the reflector and the lower housing.

[0018] Figure 6 These are top views, side views, and perspective views of the connection between the reflector and the lower housing.

[0019] Figure 7 This is a side view showing the first pose, representing the initial state of the mirror before it rotates.

[0020] Figure 8 This is a side view showing the second pose after the reflector has been rotated and its angle adjusted.

[0021] Figure 9 It is a three-dimensional view of the bearing component with the upper housing removed.

[0022] Figure 10 yes Figure 9 X-X sectional view in the figure.

[0023] Figure 11 yes Figure 10 XI-XI sectional view in the figure.

[0024] Figure 12 This is an exploded perspective view of the connection between the reflector and the lower housing in the modified example.

[0025] Figure 13 This is a magnified perspective view of the connecting part of the mirror in the modified example.

[0026] Explanation of reference numerals in the attached figures

[0027] 100. Head-up display; 110. Housing; 111. Upper housing; 111a, 153. Hole; 112. Lower housing; 113. Transparent cover; 114. Opening; 115, 116. Support; 115a. Part 1; 115b. Part 2; 117, 155. Connecting component; 130, 140, 140A. Reflector; 141, 141A. Reflector body; 142, 143, 142A. Shaft; 150, 150A. Gear assembly; 151, 151A. Fixing part; 152, 152A. Gear part; 154. Protrusion; 160, 160A. Bearing assembly; 161 1. Bearing body; 162, 166, 162A, Through hole; 163, Flat plate; 164, 164A, Protrusion; 165, Recess; 167, Part; 170, Torsion spring; 171, One end; 172, The other end; 180, Restricting member; 190, Drive unit; 191, Gear; 200, Liquid crystal assembly; 300, Vehicle; 301, Instrument panel; 302, Windshield; AX1, Rotation axis; I1, Virtual image; D1, Area; DI1, Horizontal direction; DI11, DI12, Direction; S1, Space; S11, First space; S12, Second space; W1, W2, Amplitude; θ1, θ2, Angle. Detailed Implementation

[0028] (The insights that form the basis of this disclosure)

[0029] The inventors have discovered the following problems with head-up displays, as described in the "Background Art" section.

[0030] In the head-up display of Patent Document 1, since the bearing component is fixed to the housing, it is necessary to install the bearing component to the housing after installing the reflector. Therefore, the operation of fixing the bearing component to the housing becomes complicated.

[0031] In view of the above situation, a head-up display is sought that allows the reflector to be easily fixed to the housing in a rotatable state by means of bearing components.

[0032] Therefore, the head-up display of this disclosure includes: a reflector having a reflector body and a shaft portion serving as a rotation axis; a bearing member supporting the shaft portion of the reflector for rotational flexibility; a torsion spring fitted around the shaft portion and applying force to the reflector relative to the bearing member in a predetermined rotational direction relative to the rotation axis; and a housing housing the reflector, the bearing member, and the torsion spring, the torsion spring being disposed on the side of the bearing member opposite to the reflector, the bearing member having a protrusion that protrudes toward the side of the bearing member opposite to the reflector for engaging one end of the torsion spring, and the housing having a recess that engages with the bearing member to fix the bearing member in place.

[0033] Therefore, the operator assembling the head-up display can easily install the reflector into the housing in a rotatable state supported by the bearing member by fitting the reflector, which is equipped with a bearing member and a torsion spring, into the recess of the housing. In other words, the operator can easily fix the reflector to the housing 110 in a rotatable state supported by the bearing member.

[0034] Alternatively, the height of the protrusion may be greater than the thickness of one end of the torsion spring.

[0035] Therefore, by keeping one end of the torsion spring locked in the protrusion, the likelihood of one end of the torsion spring detaching from the protrusion can be reduced.

[0036] Alternatively, the bearing component may also have a flat plate portion that protrudes to a greater extent than the height of the protrusion.

[0037] Therefore, it can improve the stiffness and durability of bearing components.

[0038] Alternatively, the protrusion may be disposed in the direction in which the flat plate extends, and the bearing member may have a recess disposed between the protrusion and the flat plate.

[0039] Therefore, it is possible to store one end of the torsion spring in the recess without the torsion spring generating a force in the direction of rotation.

[0040] Alternatively, the portion between the recess and the protrusion may be inclined relative to the axial direction of the shaft.

[0041] Therefore, it is possible to prevent the torsion spring from getting stuck on the recess side of the protrusion when the operator moves one end of the torsion spring from the recess to engage with the side opposite to the recess of the protrusion during assembly, and to allow one end of the torsion spring to move smoothly.

[0042] Alternatively, the recess of the housing may be fitted tightly against the bearing component.

[0043] Therefore, the gap between the bearing component and the recess of the housing can be set to 0, which can reduce the vibration of the reflector and reduce the display jitter of the image.

[0044] Alternatively, 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.

[0045] Therefore, it is possible to fix the bearing component, excluding the flat portion, to the recess.

[0046] Alternatively, the recess may have a first portion forming a first space for fitting the bearing member and a second portion forming a second space located below the first space and smaller than the first space.

[0047] Alternatively, the housing may have a first member and a second member that together with the first member forms a space in the housing, with the flat portion of the bearing member sandwiched between the first member and the second member.

[0048] Because the flat plate is sandwiched between the first and second components, the bearing component is more securely fixed to the housing.

[0049] Alternatively, the bearing component may also be fixed to the housing and thus to the recess by the plate portion being connected to the connecting structure.

[0050] In this way, the bearing component is fixed to the housing with the flat plate portion being penetrated by the connecting structural member, thus securing it to the housing more firmly.

[0051] Alternatively, it may also include a drive unit that generates power to rotate the reflector, the reflector having a gear member for transmitting power from the drive unit to the shaft.

[0052] Because this allows the gear component to be subsequently mounted on the reflector, it makes it easy to adapt the gear component to reflectors of other shapes or housings of other shapes as well.

[0053] Alternatively, it may also include a switch that is switched on by being pressed, the gear member having a protrusion that presses the switch when the reflector is in a position where rotation has begun.

[0054] Therefore, by turning the switch on, it is possible to detect that the reflector is in the first posture.

[0055] Alternatively, the torsion spring may also function as a compression spring, and the head-up display may further include a limiting member fixed to the end of the shaft to clamp the torsion spring together with the bearing member and limit the elongation of the torsion spring in a compressed state.

[0056] Because this limiting member restricts the torsion spring to a compressed state, it is possible to limit the position of the mirror in the direction of its rotation axis. Since the position of the mirror in the direction of its rotation axis is limited by applying force to the torsion spring, the transmission of shock caused by vibration from the housing to the mirror's axis can be reduced when the head-up display vibrates.

[0057] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Furthermore, the embodiments described below are all examples of this disclosure. The numerical values, shapes, materials, constituent elements, arrangement and connection methods of constituent elements, steps, and order of steps shown in the following embodiments are examples and are not intended to limit this disclosure. In addition, constituent elements in the following embodiments that are not described in the independent claims representing the highest-level concept are described as arbitrary constituent elements.

[0058] (Implementation Method)

[0059] [1. Examples of Heads-Up Display Use]

[0060] First, refer to Figure 1 and Figure 2 This section describes an example of the use and a general structure of the head-up display 100 in this embodiment. Figure 1 This is a diagram illustrating an example of the use of the head-up display 100 in this embodiment. Figure 2 This is a diagram showing the display area of ​​the image displayed by the head-up display 100 of this embodiment.

[0061] The head-up display 100 in this embodiment is configured as a head-up display (HUD) for vehicle use and is installed near the upper surface of the dashboard 301 of the vehicle 300.

[0062] The head-up display 100 projects light onto area D1 of the windshield (front window) 302, which serves as the display medium. The projected light is reflected by the windshield 302. This reflected light is directed towards the eyes of the user of the head-up display 100, i.e., the driver sitting in the driver's seat. The driver captures the shape of a virtual image I1 seen on the opposite side (outside the vehicle) of the windshield 302, against a background of actual objects seen through the windshield 302. In this embodiment, this series of events is represented by the head-up display 100 using the windshield 302 to display the virtual image I1.

[0063] Figure 2 This diagram shows an example of an area D1 where light is projected by the head-up display 100 of this embodiment.

[0064] like Figure 2 As shown, the head-up display 100 mounted on the instrument panel 301 projects light, for example, onto an area D1 (the area enclosed by the dotted line in the figure) located on the driver's side of the windshield 302, slightly below it. Thus, when viewed from the driver's perspective, a virtual image I1 (see reference) is displayed, visible from the opposite side of the windshield 302 (outside the vehicle). Figure 1 ).

[0065] [2. Structure of a Head-Up Display]

[0066] Next, use Figure 1 and Figure 3 Explain the structure of the head-up display 100. Figure 3 This is an exploded perspective view of the housing of the head-up display 100 of this embodiment, with the upper housing removed.

[0067] In addition, Figure 3 In the following diagram, the vertical direction is set as the Z-axis, the direction of vehicle travel that is perpendicular to the Z-axis is set as the X-axis, and the direction perpendicular to both the Z-axis and X-axis (the left and right direction of the vehicle) is set as the Y-axis.

[0068] like Figure 1 As shown, the head-up display 100 includes a housing 110, a reflector 130, a reflector 140, and a liquid crystal assembly 200. Furthermore, as... Figure 3 As shown, the head-up display 100 includes a drive unit 190 and various components for connecting the reflector 140 to the housing 110.

[0069] The housing 110 has an upper housing 111 with an opening 114 at its upper part and forming a box-like shape that is relatively long in the Y-axis direction; a lower housing 112 forming the lower part of the box; and a transparent cover 113 that seals the opening 114 of the upper housing 111. The upper housing 111 and the lower housing 112 together form the space S1 of the housing 110. The upper housing 111 is an example of a first component, and the lower housing 112 is an example of a second component. The housing 110 houses a reflector 130, a reflector 140, and a liquid crystal assembly 200. The housing 110 is made of resin, for example, but may also be made of metal.

[0070] Reflector 130 is a reflector that reflects the image projected by the liquid crystal component 200. Reflector 140 further reflects the image reflected by reflector 130, and the reflected image is projected onto the outside of head-up display 100 via opening 114. Specifically, the image reflected by reflector 140 is projected onto windshield 302. In this embodiment, reflectors 130 and 140 are rectangular plate-shaped components that are longer in the Y-axis direction. Reflectors 130 and 140 are made of, for example, resin or metal.

[0071] The drive unit 190 generates power to rotate the reflector 140. Specifically, the drive unit 190 is, for example, a motor that provides power to the reflector 140 to change its angle. The rotation axis of the drive unit 190 and the rotation axis of the reflector 140 are connected by a power transmission member. The power of the drive unit 190 is transmitted to the reflector 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 also be a belt.

[0072] The liquid crystal assembly 200 is an example of an image generation unit that projects images by irradiating a liquid crystal panel with light from a light source. In this embodiment, the liquid crystal assembly 200 is configured to be entirely housed within the housing 110, but it may also be configured to be partially housed within the housing 110, or it may be configured to be disposed outside the housing 110.

[0073] [3. Structure of the connecting part of the reflector 140]

[0074] Next, use Figure 3 and Figure 4 The structure of the connection portion between the reflector 140 and the lower housing 112 is explained. Figure 4 This is an exploded perspective view of the connection portion between the reflector 140 and the lower housing 112.

[0075] like Figure 3 and Figure 4 As shown, the reflector 140 is supported on the support portions 115 and 116 of the lower housing 112 in a manner that allows it to rotate freely using a rotation axis AX1 parallel to the Y-axis direction.

[0076] The reflector 140 has a reflector body 141 and shaft portions 142 and 143 that form the rotation axis AX1 of the reflector body 141. The reflector body 141 is a rectangular plate-shaped member that is longer in the Y-axis direction, and is the part on which the reflector is provided. The shaft portion 142 is a cylindrical part that protrudes from the end of the reflector body 141 in the negative Y-axis direction to the negative Y-axis direction. The shaft portion 143 is a cylindrical part that protrudes from the end of the reflector body 141 in the positive Y-axis direction to the positive Y-axis direction. The shaft portions 142 and 143 are arranged on the rotation axis AX1 and are the parts that support the reflector body 141 so that it can rotate freely using the rotation axis AX1.

[0077] Shaft 142 is supported by support portion 115 of lower housing 112, and shaft 143 is supported by support portion 116 of lower housing 112. Shaft 142 is provided with gear member 150, bearing member 160, torsion spring 170 and restraining member 180.

[0078] Gear component 150 is a component disposed between shaft portion 142 and drive portion 190, used to transmit power from drive portion 190 to shaft portion 142. Gear component 150 has a fixing portion 151 fixed to shaft portion 142 and a gear portion 152 receiving power from drive portion 190. Gear component 150 is fixed to shaft portion 142 by a connecting member 155 passing through shaft portion 142 and fixed to fixing portion 151. In addition, gear component 150 may also have a hole 153 for fixing the end of torsion spring 170. In addition, gear component 150 may also have a protrusion 154. The function of protrusion 154 will be described later.

[0079] The bearing member 160 is a member that supports the shaft portion 142 of the reflector 140 so that it can rotate freely. The bearing member 160 has a flat plate portion 163 parallel to the rotation axis AX1 and a bearing body 161 having a through hole 162 through which the shaft portion 142 passes. The through hole 162 may also be surrounded by a cylindrical portion that protrudes from the bearing body 161 toward the negative side in the Y-axis direction. The flat plate portion 163 is parallel to the X-Y 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 longer in the X-axis direction.

[0080] Furthermore, the bearing member 160 has a protrusion 164 that protrudes towards the negative Y-axis direction, that is, the side of the bearing member 160 opposite to the reflector body 141 of the reflector 140. The protrusion 164 is a portion for engaging one end 171 of the torsion spring 170. The protrusion 164 is disposed in the direction in which the flat plate portion 163 extends, that is, in the direction that exists in the X-Y plane that passes through and is parallel to the flat plate portion 163. In addition, the flat plate portion 163 protrudes towards the negative Y-axis direction by a greater degree than the height of the protrusion 164. That is, the amount by which the flat plate portion 163 protrudes from the bearing body 161 towards the negative Y-axis direction is greater than the amount by which the protrusion 164 protrudes.

[0081] Furthermore, the bearing member 160 also has a recess 165 disposed between the flat plate portion 163 and the protrusion 164. The flat plate portion 163 and the protrusion 164 have portions that protrude from the bearing body 161 towards the negative Y-axis direction. That is, the recess 165 is a portion that protrudes less from the bearing body 161 towards the negative Y-axis direction compared to the flat plate portion 163 and the protrusion 164. Alternatively, the recess 165 may also be a portion where the amount of protrusion from the bearing body 161 towards the negative Y-axis direction is zero.

[0082] In addition, the flat plate portion 163 has a through hole 166. The function of the through hole 166 will be described later.

[0083] A torsion spring 170 is sleeved on the shaft portion 142 and positioned on the side of the bearing member 160 opposite to the reflector body 141 of the reflector 140. One end 171 of the torsion spring 170 is engaged with the protrusion 164 for fixation, and the other end 172 is fixed to the hole 153 of the gear member 150. When one end 171 and the other end 172 of the torsion spring 170 approach each other in the circumferential direction of the circle centered on the rotation axis AX1, a force is generated that rebounds in the direction that one end 171 and the other end 172 move away in the circumferential direction. In other words, the torsion spring 170 exerts a force in the rotational direction that causes the gear member 150 and the bearing member 160 to move away from each other in the rotational direction of the rotation axis AX1.

[0084] In addition, the torsion spring 170 may also function as a compression spring. That is, when the helical portion of the torsion spring 170, which is fitted onto the shaft portion 142, is compressed in the Y-axis direction, it generates a force that rebounds in the direction of elongation.

[0085] The limiting member 180 is fixed to the negative end of the shaft portion 142 in the Y-axis direction, so as to clamp the torsion spring 170 together with the bearing member 160 and compress the torsion spring 170, thus limiting the elongation of the torsion spring 170. The limiting member 180 has a plate-like shape that extends away from the shaft portion 142 in a direction perpendicular to the rotation axis AX1 of the shaft portion 142. The limiting member 180 is provided at a position that overlaps with at least a portion of the torsion spring 170 in the Y-axis direction.

[0086] In this way, the limiting member 180 restricts the torsion spring 170 to a compressed state, thereby limiting the position of the reflector 140 in the direction of the rotation axis AX1. Since the position of the reflector 140 in the direction of the rotation axis AX1 is limited by the force applied by the torsion spring 170 in the direction of the rotation axis AX1, the transmission of shock caused by vibration from the housing 110 to the shaft portion 142 of the reflector 140 can be reduced when the head-up display 100 vibrates.

[0087] Here, use Figure 5 and Figure 6 Explain the method of fixing the torsion spring 170.

[0088] Figure 5 and Figure 6 These are top views, side views, and perspective views of the connection portion between the reflector 140 and the lower housing 112. Figure 5 This shows the state before one end 171 of the torsion spring 170 is engaged with the protrusion 164 of the bearing member 160. Figure 6 This shows the state after one end 171 is hooked onto the protrusion 164. Figure 5 (a) and Figure 6 (a) is a top view. Figure 5 (b) and Figure 6 (b) is a side view. Figure 5 (c) and Figure 6 (c) is a 3D diagram.

[0089] like Figure 5 As shown, with the gear member 150, bearing member 160, torsion spring 170, and restraining member 180 assembled on the shaft portion 142, one end 171 of the torsion spring 170 is positioned at the recess 165 of the bearing member 160. In this state, one end 171 of the torsion spring 170 is moved from the recess 165 towards the positive X-axis direction of the protrusion 164. As a result, as... Figure 6 As shown, one end 171 of the torsion spring 170 is engaged and fixed at the positive side of the protrusion 164 in the X-axis direction. That is, one end 171 and the other end 172 of the torsion spring 170 are fixed in a state where they are close together in the circumferential direction around the shaft 142. Therefore, as... Figure 6As shown in (b), the torsion spring 170 applies a force to the gear member 150 in the rightward rotational direction relative to the bearing member 160. Since the gear member 150 is fixed to the shaft portion 142 of the reflector 140, the torsion spring 170 applies a force to the reflector 140 in the rightward rotational direction relative to the bearing member 160. Therefore, by simply moving one end 171 of the torsion spring 170 from the recess 165 towards the protrusion 164 in the X-axis direction and engaging it with the protrusion 164, the operator can easily make the torsion spring 170 apply a force in the rotational direction between the bearing member 160 and the reflector 140. Therefore, work efficiency can be improved.

[0090] Furthermore, in the bearing member 160, the portion 167 between the recess 165 and the protrusion 164 is inclined relative to the axial direction AX1 of the shaft portion 142. Therefore, it is possible to prevent the situation where one end 171 of the torsion spring 170 gets stuck on the negative side of the X-axis direction of the protrusion 164 when the operator moves one end 171 of the torsion spring 170 from the recess 165 to the positive side of the protrusion 164 in the X-axis direction during the assembly operation, and one end 171 of the torsion spring 170 can move smoothly.

[0091] Furthermore, in the bearing component 160, the height of the protrusion 164 (that is, the amount by which the protrusion 164 protrudes from the bearing body 161 toward the negative side in the Y-axis direction) is greater than the thickness of one end 171 of the torsion spring 170. Therefore, one end 171 of the torsion spring 170 can be kept engaged with the protrusion 164, reducing the likelihood of one end 171 of the torsion spring 170 detaching from the protrusion 164.

[0092] Next, use Figure 7 and Figure 8 This illustrates the effect of applying force between the bearing component 160, the reflector 140, and the gear component 150 using the torsion spring 170.

[0093] Figure 7 This is a side view showing the first pose of the initial state before the reflector 140 rotates. Figure 8 This is a side view showing the second pose after the reflector 140 has been rotated and its angle adjusted.

[0094] Furthermore, the first orientation of the reflector 140 in its initial state is an orientation parallel to direction DI11 at an angle θ1 relative to the horizontal direction DI1. The second orientation of the reflector 140 in its adjusted state is an orientation parallel to direction DI12 at an angle θ2 relative to the horizontal direction DI1.

[0095] Since the bearing component 160 is fixed to the lower housing 112, it can be directed by the torsion spring 170. Figure 7 and Figure 8When a force is applied in the right-hand rotation direction as shown, the right-hand rotation side (tooth surface) of each tooth of the gear portion 152 of the gear member 150 is kept in contact with the left-hand rotation side (tooth surface) of each tooth of the gear 191 of the drive portion 190. Therefore, the reflector 140 can maintain the contact between the tooth surface of the gear portion 152 and the tooth surface of the gear 191 of the drive portion 190 in both the first and second postures, thereby reducing the wobbling of the reflector 140.

[0096] In addition, using Figure 7 and Figure 8 Explain the function of the protrusion 154 of the gear component 150.

[0097] like Figure 7 As shown, when the reflector 140 is in its initial first position, the protrusion 154 becomes the state of pressing the switch 156. For example, as Figure 9 As shown, switch 156 is fixed to the lower housing 112. Switch 156 is switched to an ON state by being pressed, and switched to an OFF state when the pressed state is released. Switch 156 is, for example, a touch switch. For example, when switch 156 is in the ON state, a control unit (not shown) can determine that the position of reflector 140 is the first position. Furthermore, as... Figure 8 As shown, when the reflector 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 reflector 140 is not the first position. Therefore, when the switch 156 is in the on state, the control unit can easily determine that it is the first position.

[0098] Next, use Figures 9-11 This describes the connection configuration between the bearing component 160 and the lower housing 112. Figure 9 This is a perspective view of the bearing component 160 with the upper housing 111 removed. Figure 10 yes Figure 9 The X-X sectional view in the diagram. Specifically, Figure 10 This is a cross-sectional view of the head-up display 100 with the upper housing 111 removed by cutting through the X-Y plane via the rotation axis AX1. Figure 11 yes Figure 10 The XI-XI sectional view in the diagram. Specifically, Figure 11 This is a cross-sectional view taken by the X-Z plane, which is cut through the center of the bearing body 161 in the Y-axis direction of the bearing component 160.

[0099] As shown in these figures, the support portion 115 is composed of a recess (groove) into which the bearing body 161 of the bearing member 160, that is, the portion of the bearing member 160 excluding the flat plate portion 163, fits. The recess of the support portion 115, by fitting into the bearing body 161, fixes the bearing member 160 to the lower housing 112. The recess of the support portion 115 is in close contact with the bearing body 161 of the bearing member 160. Specifically, the width of the recess of the support portion 115 in the Y-axis direction and the width of the bearing body 161 in the Y-axis direction are both equal (width W1). Furthermore, the width of the recess of the support portion 115 in the X-axis direction and the width of the bearing body 161 in the X-axis direction are both equal (width W2). Additionally, the bearing body 161 can be pressed into the recess of the support portion 115, and the gap between the bearing body 161 and the recess of the support portion 115 can be zero. Therefore, the gap between the bearing component 160 and the support portion 115 of the lower housing 112 can be set to 0, which can reduce the vibration of the reflector 140 and reduce image display jitter.

[0100] In addition, such as Figure 11 As shown, the support portion 115 has a first portion 115a forming a first space S11 into which the bearing body 161 of the bearing member 160 is fitted, and a second portion 115b forming a second space S12 located below the first space S11 and smaller than the first space S11. The width of the second space S12 in the X-axis direction is smaller than the width of the first space S11 in the X-axis direction. 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 the range where the hole 153 of the gear member 150 and the other end 172 of the torsion spring 170 can move when the angle of the reflector 140 changes. Since the width of the second space S12 in the X-axis direction is smaller than the width of the first space in the X-axis direction, 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.

[0101] Furthermore, the bearing member 160 is fixed to the housing 110 by being sandwiched between the upper housing 111 and the lower housing 112 via the flat plate portion 163. Additionally, the bearing member 160 is fixed to the housing 110 by a connecting member 117 passing through the flat plate portion 163, thereby being fixed to the recess of the support portion 115. The connecting member 117 passes through a through hole 166 in the flat plate portion 163. The connecting member 117 is, for example, a screw.

[0102] Because the flat plate portion 163 is sandwiched between the upper housing 111 and the lower housing 112, the bearing member 160 can be more securely fixed to the housing 110. In addition, the bearing member 160 is fixed to the housing 110 with the flat plate portion 163 being penetrated by the connecting member 117, thus it is more securely fixed to the housing 110.

[0103] The connecting member 117 is located on the outside of the housing 110 and near the outer wall of the housing 110, passing through the flat plate portion 163 of the lower housing 112 and the bearing member 160 and fixed to the upper housing 111 through the hole 111a.

[0104] [4. Effects, etc.]

[0105] The head-up display 100 of this embodiment includes a reflector 140, a bearing member 160, a torsion spring 170, and a housing 110. The reflector 140 has a reflector body 141 and a shaft portion 142 that forms a rotation axis AX1. The bearing member 160 supports the shaft portion 142 of the reflector 140 for free rotation. The torsion spring 170 is fitted over the shaft portion 142 and applies a force to the reflector 140 relative to the bearing member 160 in a predetermined rotational direction relative to the rotation axis AX1. The housing 110 houses the reflector 140, the bearing member 160, and the torsion spring 170. The torsion spring 170 is disposed on the side of the bearing member 160 opposite to the reflector 140. The bearing member 160 has a protrusion 164 that protrudes towards the side of the bearing member 160 opposite to the reflector 140 for engaging one end 171 of the torsion spring 170. The housing 110 has a recess (support portion 115) that engages with the bearing member 160 to fix the bearing member 160.

[0106] Therefore, the operator assembling the head-up display 100 can easily mount the reflector 140, which is supported by the bearing member 160 and has a torsion spring 170, onto the housing 110 by fitting the reflector 140, which is equipped with the bearing member 160 and a torsion spring 170, into the recess of the support portion 115 of the housing 110. In other words, the operator can easily fix the reflector 140 to the housing 110 in a rotatable state supported by the bearing member 160.

[0107] 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, one end 171 of the torsion spring 170 can be kept engaged with the protrusion 164, reducing the likelihood of one end 171 of the torsion spring 170 detaching from the protrusion 164.

[0108] Furthermore, in the head-up display 100, the bearing member 160 also has a flat plate portion 163 that protrudes to a greater extent than the height of the protrusion 164. Therefore, the rigidity of the bearing member 160 can be increased, and the durability of the bearing member 160 can be improved.

[0109] 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 housed in the recess 165 without generating a force in the rotational direction.

[0110] Furthermore, in the head-up display 100, the portion 167 between the recess 165 and the protrusion 164 is tilted relative to the axial direction AX1 of the shaft portion 142. Therefore, it is possible to prevent the situation where one end 171 of the torsion spring 170 gets stuck on the negative side of the X-axis direction of the protrusion 164 when an assembly worker moves one end 171 of the torsion spring 170 from the recess 165 to the positive side of the protrusion 164 in the X-axis direction, and the one end 171 of the torsion spring 170 can move smoothly.

[0111] Furthermore, in the head-up display 100, the recess of the support portion 115 of the housing 110 is in close contact with the bearing member 160. As a result, the gap between the bearing member 160 and the support portion 115 of the lower housing 112 can be set to 0, which can reduce the vibration of the reflector 140 and reduce image display jitter.

[0112] Furthermore, in the head-up display 100, for the bearing member 160, the portion of the bearing member 160 excluding the flat plate portion 163 fits into the recess of the support portion 115, thereby fixing it to the recess. Therefore, the bearing body 161 of the bearing member 160 can be fixed to the recess.

[0113] Furthermore, in the head-up display 100, the recess of the support portion 115 has a first portion 115a forming a first space S11 for fitting the bearing member 160 and a second portion 115b forming a second space S12 located below the first space S11 and smaller than the first space S1.

[0114] 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 in the housing 110. The flat plate portion 163 of the bearing member 160 is sandwiched between the upper housing 111 and the lower housing 112. Because the flat plate portion 163 is sandwiched between the upper housing 111 and the lower housing 112, the bearing member 160 is more securely fixed to the housing 110.

[0115] Furthermore, in the head-up display 100, the bearing member 160 is also fixed to the housing 110 through the plate portion 163 connected to the connecting structure 117, thereby fixing it to the recess of the support portion 115. In this way, the bearing member 160 is fixed to the housing 110 with the plate portion 163 connected to the connecting structure 117 through it, thus fixing it to the housing 110 more securely.

[0116] Furthermore, the head-up display 100 also includes a drive unit 190 that generates power to rotate the reflector 140. The reflector 140 has a gear member 150 for transmitting the power from the drive unit 190 to the shaft 142. Because the gear member 150 can be subsequently mounted on the reflector 140, it is easy to adapt the gear member 150 to reflectors of other shapes or housings of other shapes.

[0117] Furthermore, the head-up display 100 also includes a switch 156 that is switched on by being pressed. The gear member 150 has a protrusion 154 that presses the switch 156 when the reflector 140 is in the starting position of rotation, i.e., the first position. Therefore, when the switch 156 is in the on position, the control unit can easily determine that it is the first position.

[0118] Furthermore, in the head-up display 100, the torsion spring 170 also functions as a compression spring. The head-up display 100 also includes a limiting member 180. The limiting member 180 is fixed to the end of the shaft portion 142, clamping the torsion spring 170 together with the bearing member 160 and limiting the elongation of the torsion spring 170 in a compressed state. Since the limiting member 180 restricts the torsion spring 170 to a compressed state, the position of the reflector 140 in the direction of the rotation axis AX1 can be limited. Since the position of the reflector 140 in the direction of the rotation axis AX1 is limited by the force applied by the torsion spring 170 in the direction of the rotation axis AX1, the transmission of shock caused by vibration from the housing 110 to the shaft portion 142 of the reflector 140 can be reduced when the head-up display 100 vibrates.

[0119] [5. Variations]

[0120] In the above embodiment, the reflector 140 is configured to receive power from the drive unit 190 via a gear member 150 mounted on the shaft 142, but it is not limited to this configuration. For example, it may also be configured as follows: Figure 12 and Figure 13 As shown, the gear component 150A is located at the lower part of the reflector 140A. Figure 12 This is an exploded perspective view of the connection portion between the modified mirror 140A and the lower housing. Figure 13 This is a magnified perspective view of the connection part of the modified mirror 140A.

[0121] As shown in these figures, the reflector 140A has a reflector body 141A, a shaft portion 142A, a hole 143A, and a mounting portion 144A. The reflector body 141A is the same as the reflector body 141. The shaft portion 142A is a cylindrical portion that protrudes outward in the longitudinal direction from the end face of the reflector body 141A. Similar to the embodiment, a bearing member 160A, a torsion spring 170, and a restraining member 180 are mounted on the shaft portion 142A.

[0122] One end 171 of the torsion spring 170 is engaged with the protrusion 164A of the bearing member 160A, and the other end 172 is fixed to the hole 143A provided in the reflector body 141A. The limiting member 180 is fixed to the end of the shaft portion 142A with the bearing member 160A and the torsion spring 170 sleeved on the shaft portion 142A.

[0123] The gear component 150A has a fixing part 151A and a gear part 152A that engage with the mounting part 144A. The fixing part 151A is fixed by engaging with the mounting part 144A. The gear part 152A receives power from the drive part 190A. Furthermore, as... Figure 13 As shown, the gear component 150A presses the switch 156A when the reflector 140A is in its initial first position. Therefore, as in the embodiment, it is possible to easily detect the state in which the reflector 140A is in its first position.

[0124] With the gear component 150A located at the lower part of the reflector 140A, the same function as in the embodiment can be achieved.

[0125] The above description illustrates one or more embodiments of the head-up display based on implementation methods, but this disclosure is not limited to these embodiments. Various modifications conceived by those skilled in the art to these embodiments, and configurations constructed by combining elements of different embodiments, may also be included within the scope of one or more embodiments of this disclosure without departing from the spirit of this disclosure.

[0126] Industrial availability

[0127] This disclosure is useful for head-up displays and the like, which allow for easy fixing of a reflector to a housing in a rotatable state using bearing components.

Claims

1. A head-up display, wherein, The head-up display includes: A reflector having a reflector body and a shaft that serves as a rotation axis; A bearing component that supports the shaft portion of the reflector so that it can rotate freely; A torsion spring, sleeved on the shaft, applies a force to the reflector relative to the bearing member in a predetermined rotational direction relative to the rotating shaft; and The housing includes the reflector, the bearing assembly, and the torsion spring. The torsion spring is located on the side of the bearing component opposite to the reflector. The bearing component has a protrusion that extends toward the side of the bearing component opposite to the reflector, for one end of the torsion spring to engage. The housing has a recess that engages with the bearing component to secure it. The bearing component also has a flat plate portion that protrudes to a greater extent than the height of the protrusion. The protrusion is positioned in the direction in which the flat plate extends. The bearing component has a recess disposed between the protrusion and the flat plate.

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

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

4. The head-up display according to claim 1 or 2, wherein, The recess of the housing is in close contact with the bearing component.

5. The head-up display according to claim 1 or 2, wherein, The bearing component is fixed to the recess by fitting its portion other than the flat plate portion into the recess.

6. The head-up display according to claim 1 or 2, wherein, The recess has a first portion forming a first space for fitting the bearing member and a second portion forming a second space located below the first space and smaller than the first space.

7. The head-up display according to claim 1 or 2, wherein, The housing has a first member and a second member that, together with the first member, forms a space within the housing. The flat plate portion of the bearing component is sandwiched between the first component and the second component.

8. The head-up display according to claim 7, wherein, The bearing component is also fixed to the housing by the connecting structure through the flat plate portion, thereby fixing it to the recess.

9. The head-up display according to claim 1 or 2, wherein, The head-up display also includes a drive unit that generates the power to rotate the reflector. The reflector has a gear component for transmitting power from the drive unit to the shaft.

10. The head-up display according to claim 9, wherein, The head-up display also includes a switch that is turned on by being pressed. The gear component has a protrusion that presses the switch when the reflector is in the position where rotation begins.

11. The head-up display according to claim 1 or 2, wherein, The torsion spring also functions as a compression spring. The head-up display also includes a limiting member fixed to the end of the shaft to clamp the torsion spring together with the bearing member and limit the elongation of the torsion spring under a compressed state.

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