Display device

Abstract

A display device according to the present disclosure comprises a mount, an attachment member, a stay, and a display. A base has a trapezoidal columnar shape including an upper surface fixed to a vehicle, a lower surface having an area larger than that of the upper surface, and first and second side surfaces. The mount is slidably assembled to the base along a first direction. Slide surfaces extending along the first direction are respectively formed on first and second side walls erected from a bottom surface of the mount so as to face the first and second side surfaces. The attachment member protrudes from the bottom surface of the mount along a second direction and comes into contact with the lower surface, applies a rotational moment to the base with a contact portion between a rear surface side of the lower surface and the bottom surface as a fulcrum, and brings the slide surfaces of the first and second side walls into pressure contact with the first and second side surfaces of the base. A contact position of a portion protruding toward the lower surface is, in a range farther from the fulcrum than a position based on a detachment load, a position closer to the fulcrum than a position based on a cracking load.

Description

Display device

[0001] The present disclosure relates to a display device.

[0002] Generally, an interior rearview mirror for visually recognizing the rear of a vehicle is installed in the cabin of the vehicle. For example, it is required that the interior rearview mirror does not injure the occupant's head when the occupant's head comes into contact with the mirror in a vehicle collision accident or the like.

[0003] For example, Patent Document 1 discloses a technology in which the strength of a mounting portion is intentionally weakened to detach an accessory such as an interior rearview mirror when an impact is applied.

[0004] Japanese Unexamined Patent Publication No. 2020-093710

[0005] However, when the strength of the mounting portion is intentionally weakened, there is no robustness in resistance to the stress load generated in the mounting process such as screw tightening, and damage may occur in the mounting process depending on variations. For this reason, there has been a problem that productivity is reduced due to countermeasures against damage that may occur due to variations, such as adding a build-up process and suppressing tightening torque.

[0006] The present disclosure has been made in view of the foregoing, and one of the objects thereof is to reduce the stress load generated in the mounting process.

[0007] The display device according to this disclosure comprises a mount, a mounting member, a stay, and a display. The base is trapezoidal and columnar, including an upper surface fixed to a vehicle, a lower surface larger in area than the upper surface and facing the opposite direction, a first side surface positioned between the lower surface and the upper surface, and a second side surface positioned on the opposite side of the first side surface. The mount is slidably assembled to the base along a first direction extending from the rear surface of the base to the front surface facing the opposite direction, enclosing the first side surface, the lower surface, and the second side surface. The mounting member is supported by the mount, with a variable length of a protruding portion that protrudes along a second direction toward the lower surface from the bottom surface of the mount facing the lower surface. The stay is connected to the mount. The display is supported by the stay. The mount has a bottom surface, a first side wall erected from the bottom surface facing the first side surface, and a second side wall erected from the bottom surface facing the second side surface. The first and second side walls each have sliding surfaces that extend along the first direction, facing the first and second side surfaces. The protruding portion contacts the lower surface and applies a force along the second direction, giving the base a rotational moment based on the force along the second direction, with the contact point between the rear side of the lower surface and the bottom surface as the fulcrum. The sliding surfaces of the first and second side walls are pressed against the first and second side surfaces of the base, respectively, which are subjected to the rotational moment. The contact position of the protruding portion with the lower surface is in a range further from the fulcrum than the position based on the detachment load that causes the mount to detach from the base, but closer to the fulcrum than the position based on the cracking load that causes the mount to break due to the pressure contact with the base.

[0008] Figure 1 shows an example of the configuration of a vehicle according to the embodiment. Figure 2 shows an example of the configuration of the display device in Figure 1. Figure 3 shows an example of the configuration of the mount in Figure 2. Figure 4 shows an example of the configuration of the mounting portion of the mount to the base in Figure 2. Figure 5 shows an example of the V-V cross section in Figure 4. Figure 6 shows an example of the analysis results according to the embodiment. Figure 7 shows an example of the analysis results according to the embodiment. Figure 8 shows an example of the analysis results according to the embodiment. Figure 9 shows an example of the analysis results according to the embodiment.

[0009] The following describes the mounting structure, electronic mirror device, and vehicle embodiments related to this disclosure with reference to the drawings.

[0010] In this disclosure, components having the same or substantially the same function as those described above in previously shown drawings are denoted by the same reference numerals, and explanations may be omitted as appropriate. Furthermore, even when representing the same or substantially the same parts, the dimensions and proportions may be shown differently in different drawings. In addition, for example, from the viewpoint of ensuring the readability of the drawings, reference numerals may be assigned only to the main components in the explanation of each drawing, and reference numerals may not be assigned to components having the same or substantially the same function as those described above in previously shown drawings.

[0011] In this disclosure, expressions such as orthogonal, horizontal, vertical, parallel, identical, coincident, and in the same position are not limited to cases where they are strictly orthogonal, horizontal, vertical, parallel, identical, coincident, or in the same position, but also include cases where they can be considered to be orthogonal, horizontal, vertical, parallel, identical, coincident, or in the same position.

[0012] Figure 1 shows an example of the configuration of a vehicle 1000 according to an embodiment. The vehicle 1000 includes a display device 100, an imaging device 200, a windshield 400, seats 410, and occupants 420.

[0013] Here, we assume that the right side of Figure 1, i.e., the direction the arrow points, is the front of the vehicle 1000. Also, as shown in Figure 1, a Cartesian coordinate system consisting of the X, Y, and Z axes is defined. The X axis extends along the windshield 400 and has the same inclination angle as the windshield 400. The Y axis is perpendicular to the X axis and extends along the left-right direction of the vehicle 1000 (in other words, the direction perpendicular to the plane of the paper). Therefore, the X-Y plane coincides with the surface of the windshield 400. The Z axis is perpendicular to the X and Y axes and extends along the normal direction of the windshield 400. Furthermore, the positive direction of the X, Y, and Z axes is defined in the direction of the arrow in Figure 1, and the negative direction is defined in the direction opposite to the arrow.

[0014] Specifically, the positive direction of the X-axis is the direction upward toward the rear of the vehicle 1000 along the windshield 400. The negative direction of the X-axis is the direction downward toward the front of the vehicle 1000 along the windshield 400. Furthermore, the positive direction of the Z-axis is the direction of the normal from the windshield 400 toward the front of the vehicle 1000. The negative direction of the Z-axis is the direction of the normal from the windshield 400 toward the rear of the vehicle 1000. In this disclosure, the X-axis direction is an example of a first direction, and the Y-axis direction is an example of a third direction.

[0015] The imaging device 200 is mounted on the rear of the vehicle 1000 and captures images of the area behind the vehicle 1000. The imaging device 200 is connected to the display device 100 via at least one wireless and wired connection. This connection may be direct or via an in-vehicle network such as an ECU (Electronic Control Unit) (not shown) or Ethernet®. The imaging device 200 outputs the captured image to the display device 100. Here, the display device 100 and the imaging device 200 are included in the in-vehicle display system 300. This in-vehicle display system 300 is an example of an electronic mirror device. The imaging device 200 is the imaging side of the electronic mirror device.

[0016] The display device 100 is installed inside the vehicle 1000, on the windshield 400, for example, in the central part of the windshield 400 in the left-right direction. A seat 410 is installed at a position toward the rear of the vehicle 1000 from the display device 100, and an occupant 420 sits in the seat 410. If the seat 410 is the driver's seat, the occupant 420 corresponds to the driver. The display device 100 receives an image from the imaging device 200 and displays the image toward the occupant 420 of the vehicle 1000. This image may be a moving image (in other words, a video) or a still image.

[0017] The display device 100 may be equipped with a computer that performs various image display processes, or it may display images on the screen according to display control performed by an external computer such as an ECU. These computers may include, for example, at least one processor and at least one memory. Various types of processors, such as a CPU (Central Processing Unit), can be used as the at least one processor. Various types of memory, such as RAM (Random Access Memory) and ROM (Read Only Memory), can be used as the at least one memory. This computer may perform various processes by loading a program stored in ROM into RAM and executing it, or it may have a dedicated circuit (hardware) configured to perform some or all of the processes.

[0018] Here, the display device 100 is, for example, the display side of an electronic mirror device and is an example of an in-vehicle accessory device. In this disclosure, the display device 100 is mainly an in-vehicle accessory device having a display function, but is not limited to this. The display device 100 may be, for example, the display part of a car navigation system or other display devices of an electronic mirror device. Furthermore, the accessory device may be other electronic devices other than the display device, or various other devices other than electronic devices such as an in-car mirror.

[0019] Figure 2 shows an example of the configuration of the display device 100 in Figure 1. Figure 2 illustrates a side view of the display device 100 from the positive direction of the Y-axis. Figure 3 shows an example of the configuration of the mount 12 in Figure 2. Figure 4 shows an example of the configuration of the mounting portion of the mount 12 to the base 10 in Figure 2. Figure 5 shows an example of the V-V cross section in Figure 4.

[0020] As shown in Figures 2 to 5, the display device 100 includes a base 10, a mount 12, a stay 14, a support part 16, a monitor 18, and mounting screws 80.

[0021] The base 10 includes an upper surface 30, a lower surface 32, a side surface 34, a front surface 36, and a rear surface 38. The side surface 34 includes a first side surface 34a and a second side surface 34b. The base 10 has a plate-like shape and is made of a hard material such as metal. Specifically, the base 10 has a trapezoidal columnar shape.

[0022] The upper surface 30 is the side of the base 10 facing the positive Z-axis direction, that is, the side facing the windshield 400. The upper surface 30 is fixed to the vehicle 1000. Specifically, the upper surface 30 is fixed to the windshield 400 using, for example, adhesive. The fixing strength at that time is such that the base 10 does not fall off the windshield 400 even if the mount 12, stay 14, support part 16 and / or monitor 18 described later are subjected to external force due to impact during sudden braking or collision of the vehicle 1000. The upper surface 30 is longer in the X-axis direction than in the Y-axis direction.

[0023] The lower surface 32 is the surface of the base 10 facing the opposite direction from the upper surface 30. In other words, the lower surface 32 is the surface facing the negative Z-axis direction. Like the upper surface 30, the lower surface 32 is longer in the X-axis direction than in the Y-axis direction. Furthermore, the area of ​​the lower surface 32 is larger than the area of ​​the upper surface 30. Specifically, the lower surface 32 is longer than the upper surface 30 in the Y-axis direction. Also, the lower surface 32 is equal in length to the upper surface 30 in the X-axis direction. In other words, when the mount 12 is not attached to the base 10, the lower surface 32 covers the upper surface 30 in a plan view from the negative Z-axis direction. To put it another way, in the same state, both ends of the lower surface 32 in the Y-axis direction are exposed from the windshield 400 side, i.e., from a plan view from the positive Z-axis direction.

[0024] The first side surface 34a is located on the base 10 between the bottom surface 32 and the top surface 30, and on the negative side of the Y-axis. The first side surface 34a has a rectangular shape that is long in the X-axis direction and is inclined so that it is located in the negative direction of the Y-axis as it approaches the bottom surface 32. The second side surface 34b is located on the base 10 between the bottom surface 32 and the top surface 30, and on the positive side of the Y-axis. Therefore, the second side surface 34b is located on the opposite side of the base 10 from the first side surface 34a. The second side surface 34b has a rectangular shape that is long in the X-axis direction and is inclined so that it is located in the positive direction of the Y-axis as it approaches the bottom surface 32. In this way, the first side surface 34a and the second side surface 34b are inclined so that they move further apart from each other as you move from the top surface 30 towards the bottom surface 32. In other words, the first side surface 34a and the second side surface 34b are inclined so that they spread out from the top surface 30 towards the bottom surface 32. Here, the angle between the first side surface 34a and the top surface 30 is equal to the angle between the second side surface 34b and the top surface 30.

[0025] The front surface 36 is the surface of the base 10 located between the bottom surface 32 and the top surface 30, and on the negative side of the X-axis. The front surface 36 has a rectangular shape that is long in the Y-axis direction and extends along a direction substantially perpendicular to the top surface 30 and the bottom surface 32. Specifically, the front surface 36 is a trapezoidal shape with one side of the top surface 30 and the other side of the bottom surface 32 as the top base and the other side as the bottom base, and the sides of the first side surface 34a and the second side surface 34b as legs. The rear surface 38 is the surface of the base 10 located between the bottom surface 32 and the top surface 30, and on the positive side of the X-axis. Both sides of the rear surface 38 in the Y-axis direction are shaped to follow the rear wall 58 of the mount 12. Both sides of the rear surface 38 in the Y-axis direction curve toward the positive X-axis direction and connect to the first side surface 34a and the second side surface 34b. The central portion of the rear surface 38 in the Y-axis direction extends in a straight line and is approximately parallel to the front surface 36. In a plan view from the positive X-axis direction, the rear surface 38 has a trapezoidal shape, with one side of the upper surface 30 and the other side of the lower surface 32 serving as the upper base and the other as the lower base, and the first side surface 34a and the second side surface 34b serving as the legs.

[0026] Mount 12 may be made of a metallic material such as aluminum, magnesium, zinc, or an aluminum alloy such as ADC. Alternatively, Mount 12 may be made of glass or resin with a filler, the filler may be glass or carbon fiber. In this way, Mount 12 is a rigid body. A rigid body means an object that does not deform when Mount 12 is slid into the base 10.

[0027] The mount 12 includes a base housing 50, a bottom surface 52, side walls 54, a rear wall 58, and a mount body 60. The side walls 54 include a first side wall 54a and a second side wall 54b.

[0028] The mount body 60 has a box-like shape that is elongated in the X-axis direction and is larger in size than the base 10. The mount body 60 has a base housing section 50 that can accommodate the base 10. The base housing section 50 is surrounded by a bottom surface 52, a first side wall 54a, a second side wall 54b, and a rear wall 58. On the other hand, the base housing section 50 is open in the positive Z-axis direction and the negative X-axis direction. The base 10, which has been inserted from the rear surface 38 side toward the positive X-axis direction, is slid into the base housing section 50. In other words, the mount 12 is slid into the base 10 along the X-axis direction from the rear surface 38 side toward the front surface 36 side of the base 10. The X-axis direction from the rear surface 38 side toward the front surface 36 side of the base 10 is an example of a first direction.

[0029] The bottom surface 52 is the surface facing the positive Z-axis direction so as to face the lower surface 32 of the base 10 when the base 10 is slid into the base housing 50. In the X-Y plane, the bottom surface 52 has the same shape as the lower surface 32 so as to allow for sliding assembly. Here, the bottom surface 52 may be larger than the lower surface 32 by a certain margin of error.

[0030] The first side wall 54a is erected on the positive Y-axis side of the base surface 52, extending from the base surface 52 toward the positive Z-axis side. The first side wall 54a extends along the X-axis direction so as to face the first side surface 34a when the base 10 is slid into the base housing 50. In other words, the first side wall 54a is erected from the base surface 52 toward the first side surface 34a. Similarly, the second side wall 54b is erected on the negative Y-axis side of the base surface 52, extending from the base surface 52 toward the positive Z-axis side. The second side wall 54b extends along the front-rear direction so as to face the second side surface 34b when the base 10 is slid into the base housing 50. In other words, the second side wall 54b is erected from the base surface 52 toward the second side surface 34b. Therefore, the mount 12 is slidably assembled to the base 10, enclosing the first side surface 34a and the second side surface 34b of the base 10.

[0031] A sliding surface 62a is formed on the first side wall 54a, facing the first side surface 34a and extending along the direction of slide assembly (in other words, the X-axis direction). Specifically, the sliding surface 62a is at least a part of the surface on the negative Y-axis side of the first side wall 54a, and is inclined to be located on the positive Y-axis side as it approaches the bottom surface 52, corresponding to the inclination of the first side surface 34a. On the other hand, the surface on the positive Y-axis side of the first side wall 54a extends along a direction approximately perpendicular to the bottom surface 52 without inclination. Therefore, the thickness of the first side wall 54a in the direction from the first side wall 54a toward the second side wall 54b, that is, in the Y-axis direction, is thinner in the part closer to the bottom surface 52 than in the part further away from the bottom surface 52.

[0032] A sliding surface 62b is formed on the second side wall 54b, facing the second side surface 34b and extending along the direction of slide assembly (in other words, the X-axis direction). Specifically, the sliding surface 62b is at least a part of the surface on the positive Y-axis side of the second side wall 54b, and is inclined to be located on the negative Y-axis side as it approaches the bottom surface 52, corresponding to the inclination of the second side surface 34b. On the other hand, the surface on the negative Y-axis side of the second side wall 54b extends along a direction approximately perpendicular to the bottom surface 52 without inclination. Therefore, the thickness of the second side wall 54b in the Y-axis direction is thinner in the part closer to the bottom surface 52 than in the part further away from the bottom surface 52.

[0033] The rear wall 58 extends along the Y-axis direction, and both sides of it in the Y-axis direction curve in the negative direction of the X-axis, continuing to the first side wall 54a and the second side wall 54b. The rear wall 58 has a shape that conforms to the rear surface 38 of the base 10, and it abuts against the rear surface 38 of the base 10 inserted into the base housing 50 from the negative direction side of the X-axis to the positive direction side, functioning as a stopper to stop the insertion of the base 10. In this way, the rear wall 58 is erected from the bottom surface 52 facing the rear surface 38 of the base 10.

[0034] A support portion 72 is formed between the bottom surface 52 and the rear wall 58. The support portion 72 is formed, for example, in a curved shape. The support portion 72 is formed at both ends of the bottom surface 52 in the Y-axis direction, but it may also be formed over the entire Y-axis direction. The support portion 72 abuts against the rear surface 38 side of the lower surface 32 of the base 10 inserted into the base housing 50. As an example, the support portion 72 abuts against at least the portion of the lower surface 32 of the base 10 that connects to the rear surface 38.

[0035] In each of the first side wall 54a and the second side wall 54b, a thin wall portion 70 is provided in the central part in the X-axis direction. The Y-axis length of the thin wall portion 70 of each side wall 54 is shorter than the Y-axis length of the side wall other than the thin wall portion 70. This relative length relationship between the two portions is common regardless of the distance in the Z-axis direction from the bottom surface 52, for example, the shortest distance. Specifically, at a position far from the bottom surface 52, that is, at a position where a sliding surface 62 is formed in which the Y-axis length of each side wall 54 is relatively long, the Y-axis length of the thin wall portion 70 is shorter than the Y-axis length of the side wall other than the thin wall portion 70. Also, at a position close to the bottom surface 52, that is, at a position where a sliding surface 62 is not formed in which the Y-axis length of each side wall 54 is relatively short, the Y-axis length of the thin wall portion 70 is shorter than the Y-axis length of the side wall other than the thin wall portion 70. Thus, even if the distance from the bottom surface 52 is the same, the thickness of each side wall 54 in the Y-axis direction is thinner in the thin wall portion 70 than in the side wall other than the thin wall portion 70.

[0036] The mount 12 is provided with a through hole 74. One opening of the through hole 74 is formed on the bottom surface 52 inside the base housing 50. The other opening of the through hole 74 is formed on the outside of the base housing 50. The through hole 74 is provided with screw threads that engage with the inserted mounting screw 80. The through hole 74 extends obliquely along a direction having an inclination θ with respect to the normal direction of the lower surface 32 of the base 10.

[0037] The mounting screw 80 is inserted into the through hole 74 from the outside of the base housing 50. Here, the mounting screw 80 is an example of a mounting member. The mounting screw 80 is screwed into the threads of the through hole 74 and is supported by the mount 12 in a variable position along the direction of the through hole 74. In other words, the mounting screw 80, when tightened into the through hole 74, extends obliquely along a direction having an inclination θ with respect to the normal direction of the lower surface 32 of the base 10. A tip portion 82, which is part of the mounting screw 80, protrudes along the direction from the bottom surface 52 toward the lower surface 32 of the base 10. The direction from the bottom surface 52 toward the lower surface 32 of the base 10 is an example of a second direction. This tip portion 82 is an example of a protruding portion. In this way, the mounting screw 80 is supported by the mount 12 in a variable length of the tip portion 82 that protrudes from the bottom surface 52 of the mount 12 toward the lower surface 32 of the base 10.

[0038] The sliding surface 62a of the first side wall 54a is angled to match the first side surface 34a of the base 10. Similarly, the sliding surface 62b of the second side wall 54b is angled to match the second side surface 34b of the base 10. This allows the base housing 50 to slide into the base 10, which has been inserted from the end on the negative side of the X-axis toward the rear wall 58 on the positive side.

[0039] Then, during the mounting process, the mounting screw 80 is tightened while the mount 12 is slidably mounted to the base 10, and its tip portion 82 protrudes from the bottom surface 52 and contacts (in other words, sits on) the lower surface 32 of the base 10, applying its axial force to the lower surface 32. Here, the contact position 90 between the tip portion 82 and the lower surface 32 of the base 10 is the seating position of the mounting screw 80 on the lower surface 32 of the base 10, and is the load point where its axial force is applied. Furthermore, the axial force of the mounting screw 80 is the force along the direction in which the mounting screw 80 protrudes from the bottom surface 52. The direction in which the mounting screw 80 protrudes from the bottom surface 52 is an example of a second direction.

[0040] The contact position 90 between the tip portion 82 of the mounting screw 80 and the lower surface 32 of the base 10 is determined by the inclination θ of the tip portion 82 of the mounting screw 80 relative to the lower surface 32. The contact position 90 is closer to the pivot point than to the bottom surface 52 side of the tip portion 82 (in other words, in the positive direction of the X axis). In other words, the contact position 90 is determined by the inclination θ of the mounting screw 80 relative to the lower surface 32 of the base 10. This inclination θ of the mounting screw 80 is determined by the inclination θ of the through hole 74 that extends along a direction oblique to the normal direction of the lower surface 32. The through hole 74 is closer to the pivot point as it approaches the bottom surface 52.

[0041] At the contact position 90, the base 10, which receives an axial force from the mounting screw 80, experiences a rotational moment that rotates the front surface 36 of the base 10 away from the bottom surface 52 around the Y axis, with the rear surface 38 of the lower surface 32, which abuts the pivot point 72, as the pivot point. In other words, the mounting screw 80 applies an axial force to the lower surface 32 of the base 10, thereby imparting a rotational moment based on the axial force to the base 10, with the end of the lower surface 32 on the rear surface 38 side, which abuts the pivot point 72, as the pivot point.

[0042] As a result, each sliding surface 62 of the mount 12, which is slide-assembled to the base 10, is pressed against the corresponding side surface 34. Specifically, stress corresponding to the rotational moment based on the axial force of the mounting screw 80 is generated on the contact surface between the base 10 and the mount 12, causing the side surface 34, which is the contact surface on the base 10 side, and the sliding surface 62, which is the contact surface on the mount 12 side, to be pressed against each other. Therefore, the sliding assembly restricts the movement of the mount 12 in the X-axis direction due to the frictional force that follows the stress generated on the contact surfaces. As a result, the mount 12 is prevented from falling off the base 10.

[0043] A stay 14 is connected to a portion of the mount body 60 on the negative Z-axis side. The stay 14 extends from the mount 12 while curving toward the negative Z-axis side and the negative X-axis side, and is connected to a back surface portion 22 of the monitor 18. On the monitor 18 side of the stay 14, a support portion 16 that rotatably supports, for example, the monitor 18 is provided. For example, the stay 14 and the support portion 16 are formed of a resin material. Further, for example, the stay 14 and the mount 12, or the stay 14 and the mount body 60, may be integrally formed. In this case, since the stay 14 is manufactured from the same material as the mount 12, it may be a rigid body similarly to the mount 12.

[0044] The monitor 18 has a long box-like shape in the Y-axis direction, and is supported by the support portion 16 of the stay 14. The monitor 18 is provided with a back surface portion 22 connected to the stay 14 and a front surface portion 20 on the opposite side from the back surface portion 22. The monitor 18 displays an image captured by the image capturing apparatus 200 in FIG. 1 on a screen (not shown) disposed on the front surface portion 20. The monitor 18 is, for example, a liquid crystal display or an organic EL (Electro-Luminescence) display.

[0045] Hereinafter, a contact position 90 between the mounting screw 80 and the base 10 in a state where the mount 12 is slidably assembled to the base 10 will be described in more detail with reference to the drawings.

[0046] As described above, each sliding surface 62 of the mount 12 slidably assembled to the base 10 is pressed against the corresponding side surface 34 by stress generated on the pressure contact surface due to a rotational moment based on the axial force of the mounting screw 80. Therefore, from the viewpoint of preventing the mount 12 from falling off from the base 10, it is preferable to increase the stress generated on the pressure contact surface to increase the frictional force. On the other hand, as the axial force of the mounting screw 80 increases, the stress generated on the pressure contact surface also increases. Therefore, as the mounting screw 80 is tightened, there is a risk that breakage of the mount 12, such as cracking of the side wall 54, may occur.

[0047] Therefore, in the present disclosure, an appropriate contact position 90 that can reduce the stress load generated on the mount 12 during the mounting step while suppressing falling-off is examined. Specifically, the contact position 90 is examined in consideration of both the condition of a falling-off load at which the mount 12 falls off from the base 10 and the condition of a cracking load at which the mount 12 breaks due to pressure contact against the base 10.

[0048] Here, the falling-off load is a condition of frictional force generated on the pressure contact surface between the base 10 and the mount 12 in accordance with the rotational moment based on the axial force of the mounting screw 80 generated in the base 10. Further, the cracking load is a condition of stress generated on the slide surface 62, which is the pressure contact surface on the mount 12 side, in accordance with the rotational moment based on the axial force of the mounting screw 80 generated in the base 10. Note that the breakage of the mount 12 is, for example, breakage of at least one of the first side wall 54a and the second side wall 54b. More specifically, the breakage of the mount 12 is breakage of the thin-walled portion 70 of each side wall 54.

[0049] In the following examination, the condition for the cracking load is that the stress load generated on the slide surface 62, which is the pressure contact surface on the mount 12 side, is less than 380 [MPa], which is the stress when breakage actually occurs in the thin-walled portion 70. Further, the condition for the falling-off load is that the frictional force generated on the pressure contact surface is larger than 890 [N], which is a value obtained by taking the safety factor into consideration for the required falling-off load. Here, the contact position at which the stress load generated on the slide surface 62 reaches 380 [MPa] is an example of a position based on the cracking load at which the mount 12 breaks due to pressure contact against the base 10. Further, the contact position at which the frictional force generated on the pressure contact surface reaches 890 [N] is an example of a position based on the falling-off load at which the mount 12 falls off from the base 10.

[0050] Figure 6 shows an example of the analysis results according to the embodiment. Figure 6 illustrates the analysis results under analysis conditions in which the axial force generated in the mounting screw 80 is set to 2000 [N], which is the axial force assumed when the vehicle is fixed, and the distance L (see Figure 5) from the rear wall 58, which is the positive end of the X-axis in the base housing 50, to the contact position 90 is changed within the range of 10 to 30 [mm]. In the example of Figure 6, the conditions for detachment load are met in the range where the distance L is greater than 11 [mm], more specifically, in the range where the distance L is 12 [mm] or more. In other words, it can be seen that the conditions for detachment load are met in the range further from the support point than the position based on the detachment load. Also, in the example of Figure 6, the conditions for cracking load are met in the range where the distance L is less than 30 [mm], more specifically, in the range where the distance L is 29 [mm] or less. In other words, it can be seen that the conditions for cracking load are met in the range closer to the support point than the position based on the cracking load. Therefore, in the example in Figure 6, it is preferable that the contact position 90 is on the side of the support point than the position based on the cracking load, within a range where the distance L is 12 [mm] or more and 29 [mm] or less, that is, further from the support point than the position based on the detachment load.

[0051] Figure 7 shows an example of the analysis results according to the embodiment. Figure 7 illustrates the analysis results under analysis conditions in which the axial force generated in the mounting screw 80 is set to 3000 [N], which is the axial force when failure actually occurs in the thin wall portion 70, and the distance L (see Figure 5) is changed within the range of 5 to 25 [mm]. In the example of Figure 7, the conditions for detachment load are met in the range where the distance L is greater than 7 [mm], more specifically, in the range where the distance L is 8 [mm] or greater. In other words, it can be seen that the conditions for detachment load are met in the range further from the support point than the position based on the detachment load. Also, in the example of Figure 7, the conditions for cracking load are met in the range where the distance L is less than 21 [mm], more specifically, in the range where the distance L is 20 [mm] or less. In other words, it can be seen that the conditions for cracking load are met in the range closer to the support point than the position based on the cracking load. Therefore, in the example of Figure 7, it is preferable that the contact position 90 is on the side of the support point than the position based on the cracking load, within a range where the distance L is 8 [mm] or more and 20 [mm] or less, that is, further from the support point than the position based on the detachment load.

[0052] As explained with reference to Figures 6 and 7, the smaller the upper limit of the cracking load, that is, the more easily it breaks, the closer the contact position 90 that satisfies the cracking load conditions is to the support point. In other words, by bringing the contact position 90 closer to the support point, the stress load on the sliding surface 62 due to the axial force generated in the mounting screw 80 can be reduced.

[0053] Furthermore, the smaller the lower limit of the detachment load, that is, the lower the load-bearing requirement, the closer the contact position 90 that satisfies the detachment load condition will be to the support point. Similarly, the larger the lower limit of the detachment load, that is, the stricter the load-bearing requirement, the further the contact position 90 that satisfies the detachment load condition will be to the support point. In other words, by bringing the contact position 90 closer to the support point within the range that satisfies the detachment load condition, it is possible to reduce the stress load on the sliding surface 62 due to the axial force generated in the mounting screw 80 while satisfying the load-bearing capacity (in other words, detachment) requirement.

[0054] Furthermore, comparing the examples in Figures 6 and 7, the greater the axial force generated in the mounting screw 80 (in other words, the force along the second direction), or the greater the tightening torque of the mounting screw 80, the closer the contact position 90 that satisfies both the conditions of detachment load and cracking load will be to the fulcrum. In other words, by moving the contact position 90 closer to the fulcrum, the axial force generated in the mounting screw 80, i.e., the tightening torque, can be increased.

[0055] Thus, in the display device 100 according to this disclosure, the screw tightening resistance of the mount 12 is improved by bringing the position where the axial force of the mounting screw 80 acts on the base 10 (in other words, the contact position 90) closer to the pivot point 72. For example, the contact position 90 of the tip portion 82 to the lower surface 32 of the base 10 is within a range further from the pivot point than the position based on the detachment load that causes the mount 12 to detach from the base 10. Also, the contact position 90 is closer to the pivot point than the position based on the crack load that causes the mount 12 to break due to pressure contact with the base 10. In other words, the contact position 90 according to this disclosure is a position within a range where the stress applied to the pressure contact surface (in other words, the crimping surface) between the base 10 and the mount 12, based on the screw axial force generated in the mount 12, and the frictional force due to said stress satisfy predetermined conditions.

[0056] With this configuration, the point where the axial force acts is closer to the fulcrum, so the rotational moment generated based on the axial force is reduced, and the stress load generated at the mounting part can be reduced. Therefore, with the above structure, the screw tightening resistance of the mount 12 can be improved. For example, by changing the distance L from 26 [mm] to 18 [mm], and bringing the contact position 90 of the mounting screw 80 closer to the fulcrum, the screw tightening resistance of the mount 12 can be improved by about 50%. Improved screw tightening resistance allows for mounting to the vehicle with high torque, thus improving productivity and also increasing design flexibility.

[0057] Furthermore, in the display device 100 according to this disclosure, the mounting screw 80 is in contact with the base 10 at an angle θ. By adding an angle, the tip portion 82 of the mounting screw 80 can be positioned on the side of the pivot point, so that the contact position 90 can be brought closer to the pivot point. For example, if the angle θ of the mounting screw 80 is 21°, the distance L is 26 [mm] when the angle θ of the mounting screw 80 is 15°, but by setting the distance L to 18 [mm], the contact position 90 can be brought closer to the pivot point.

[0058] In the above embodiment, the contact position 90 is defined using the distance L from the end of the bottom surface 52 on the pivot side, but this is not limited to this. The contact position 90 may also be defined by the ratio of the distance L to the length of the bottom surface 52 or base 10 in the X-axis direction (in other words, the first direction) of the slide assembly. Similarly, the contact position 90 can also be defined by the inclination θ of the mounting screw 80.

[0059] In the above embodiment, the contact position 90 may be determined by taking into consideration manufacturing variations of at least one of the base 10 and the mount 12, or tolerances related to the misalignment when the mount 12 is slidably mounted to the base 10.

[0060] Figure 8 shows an example of the analysis results according to the embodiment. Figure 8 illustrates the analysis results under analysis conditions in which the axial force generated in the mounting screw 80 is set to 2000 [N], which is the axial force expected when the vehicle is fixed, the deviation of the base 10 from a predetermined position is set to 1 [mm], which is the upper limit of the tolerance, and the distance L (see Figure 5) is changed within the range of 10 to 35 [mm]. As an example, the predetermined position of the base 10 is the position in which the rear surface 38 of the base 10 abuts against the rear wall 58 within the base housing portion 50 of the mount 12. As another example, the predetermined position of the base 10 is the position in which the upper surface 30 abuts against the sliding surfaces 62 of each side wall 54, and the side of the rear surface 38 of the lower surface 32 of the base 10 abuts against the pivot portion 72 of the bottom surface 52 of the mount 12.

[0061] In the example in Figure 8, the conditions for detachment load are met in the range where the distance L is greater than 11 [mm], more specifically, in the range where the distance L is 12 [mm] or greater. Also, in the example in Figure 8, the conditions for cracking load are met in the range where the distance L is less than 31 [mm], more specifically, in the range where the distance L is 30 [mm] or less. In other words, in the example in Figure 8, considering the upper limit tolerance of 1 [mm], it is preferable that the contact position 90 is at a distance L of 12 [mm] or greater and 30 [mm] or less. Therefore, comparing the examples in Figures 6 to 8, when considering a maximum tolerance of 1 [mm], it is preferable that the contact position 90 is at a distance L of 12 [mm] or greater and 20 [mm] or less. That is, even if the slid-assembled state is shifted by a predetermined amount (in other words, tolerance) in the assembly direction (in other words, the X-axis direction), it is preferable that the contact position 90 is at a range where it is further from the support than the position based on detachment load, and closer to the support than the position based on cracking load.

[0062] With this configuration, even if variations occur during manufacturing or misalignment occurs during slide mounting, the stress load generated at the mounting portion can be reduced, similar to the embodiment described above.

[0063] Here, we have only considered the case where the base 10 is shifted toward the front surface 36 side (in other words, the negative direction of the X-axis) relative to the mount 12, but this is not the only case. The case where the base 10 is shifted toward the rear surface 38 side (in other words, the positive direction of the X-axis) relative to the mount 12 can also be considered. In other words, even if the contact position 90 is shifted by a predetermined amount (in other words, tolerance) in at least one direction in the assembly direction (in other words, the X-axis direction), it is preferable that it is further from the support point than the position based on the detachment load, and closer to the support point than the position based on the cracking load.

[0064] In the installation process for attaching the display device 100 to the base 10 fixed to the vehicle's windshield 400, the work of tightening the mounting screws 80 is required. However, depending on the positional relationship of the windshield 400 and other peripheral equipment, it may not be possible to tighten the screws. For this reason, in the above embodiment, the contact position 90 may be determined considering the range in which the screw tightening work can be performed. Specifically, the contact position 90 may be a position defined by an inclination θ (angle) that allows the screw tightening work to be performed. However, if the inclination θ of the mounting screw 80 changes, the required length of the mounting screw 80 and the through hole 74 will also change.

[0065] Figure 9 shows an example of the analysis results according to the embodiment. Figure 9 illustrates the analysis results when the mounting screw 80 has a length of 15.5 [mm] and a screw head diameter (diameter) of 10 [mm], and the mounting screw 80, when tightened to a predetermined position, i.e., when seated on the seating surface, does not interfere with other parts. In the example of Figure 9, a clearance of 6 [mm] with the seating surface wall is secured, the deviation of the base 10 from the predetermined position is 1 [mm], and the gap between the seating surface and the mounting screw 80, taking into account the tolerance of the mounting screw 80, is 1.5 [mm]. In this case, if the inclination θ of the mounting screw 80 is within the angle range in which tightening is possible, the required screw hole length is 13 mm or less. Therefore, in the example of Figure 9, it is preferable that the distance L to the screw seating position is 14 [mm] or more, such that the required screw length, defined from the angle range in which the mounting screw 80 can be tightened, is 13 [mm] or less.

[0066] Comparing the examples in Figures 6 to 9, when further considering the range of work possible during screw tightening, it is preferable that the contact position 90 has a distance L of 14 mm or more and 20 mm or less. That is, the contact position 90 is preferable to be in a range further from the support point than the position based on the detachment load, while considering the range of work possible during screw tightening, and closer to the support point than the position based on the cracking load.

[0067] In this configuration, the contact position 90 is determined based on the length of the mounting screw 80, the range of length of the through hole 74 defined by the angle range in which the screw can be tightened, i.e., the required screw length, and further on. Therefore, even when the inclination θ of the mounting screw 80 is changed to allow the screw to be tightened, the stress load generated at the mounting portion can be reduced, similar to the embodiment described above.

[0068] In the above embodiment, a mounting screw 80 was used as an example of a mounting member, but the invention is not limited to this. The mounting member can be any member that is supported by the mount 12 with a variable length of the portion protruding from the bottom surface 52. For example, the mounting member may be latched to the mount 12 in multiple stages, with a different length of the portion protruding from the bottom surface 52 at each stage. For example, the mounting member may be a rack and pinion mechanism, a crank mechanism, or a link mechanism.

[0069] According to at least one embodiment described above, the stress load generated during the installation process can be reduced.

[0070] While several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0071] (Note) The above description of embodiments discloses the following technology. (1) A trapezoidal columnar base including an upper surface fixed to a vehicle, a lower surface larger in area than the upper surface facing the opposite direction from the upper surface, a first side surface positioned between the lower surface and the upper surface, and a second side surface positioned on the opposite side of the first side surface, is slidably assembled to a trapezoidal columnar base along a first direction extending from the rear surface of the base toward the front surface facing the opposite direction from the rear surface, while surrounding the first side surface, the lower surface and the second side surface; a mounting member supported by the mount with a variable length of a protruding portion that protrudes along a second direction toward the lower surface from the bottom surface of the mount facing the lower surface; a stay connected to the mount; and a monitor supported by the stay, wherein the mount has a bottom surface, a first side wall erected from the bottom surface facing the first side surface, and a second side wall erected from the bottom surface facing the second side surface, and the first side wall and the second side wall each have a sliding surface that extends along the first direction facing the first side surface and the second side surface, respectively. Display device. (2) The protruding portion contacts the lower surface and applies a force along the second direction, and applies a rotational moment to the base based on the force along the second direction, with the contact point between the rear side of the lower surface and the bottom surface being the pivot point, the sliding surfaces of the first side wall and the second side wall are pressed against the first side and the second side of the base that have received the rotational moment, respectively, and the contact position of the protruding portion to the lower surface is in a range further from the pivot point than the position based on the detachment load that causes the mount to fall off the base, and closer to the pivot point than the position based on the cracking load that causes the mount to break due to the pressure against the base. (2) The display device according to (1) above, one opening of a through hole with screw threads is formed in the bottom surface, the mounting member is a screw that is inserted and screwed in from the other opening of the through hole, and the force along the second direction is the axial force of the screw.(3) The delamination load is a condition for the frictional force generated on the contact surface between the base and the mount in response to the rotational moment, and the cracking load is a condition for the stress generated on the sliding surface in response to the rotational moment, as described in (1) or (2) above. (4) The failure of the mount is the failure of at least one of the first side wall and the second side wall, as described in any one of (1) to (3) above. (5) The contact position is defined by the distance from the end of the bottom surface on the side of the support point, or by the ratio of said distance to the length of the bottom surface in the first direction, as described in any one of (1) to (4) above. (6) The contact position is closer to the support point the greater the force along the second direction, as described in any one of (1) to (5) above. (7) The bottom surface has one opening of a through hole with screw threads, the mounting member is a screw that is inserted and screwed in from the other opening of the through hole, the force in the second direction is the axial force of the screw, and the contact position is closer to the fulcrum as the tightening torque of the screw increases, the display device according to any one of (1) to (6) above. (8) The contact position is closer to the fulcrum as the crack load is smaller, the display device according to any one of (1) to (7) above. (9) The contact position is closer to the fulcrum as the detachment load is smaller, the display device according to any one of (1) to (8) above. (10) The contact position is defined by the inclination of the protruding portion with respect to the bottom surface, and is closer to the fulcrum than to the bottom surface side of the protruding portion, the display device according to any one of (1) to (9) above.(11) The bottom surface has one opening of a through hole with screw threads, the mounting member is a screw that is inserted and screwed in through the other opening of the through hole, the force in the second direction is the axial force of the screw, the contact position is defined by the inclination of the screw with respect to the bottom surface, and the through hole extends along a direction oblique to the normal direction of the bottom surface, with the closer it is to the bottom surface being closer to the fulcrum, the display device according to any one of (1) to (10) above. (12) The contact position is further based on the length of the screw and the range of the length of the through hole defined by the angle range in which the screw can be tightened, the display device according to (11) above. (13) The side of the bottom surface of the fulcrum is a curved portion formed between the bottom surface and a rear wall erected from the bottom surface facing the rear surface, the display device according to any one of (1) to (12) above. (14) The display device according to any one of (1) to (13) above, wherein the contact position is a position that is further from the support point than the position based on the falling load, when the base is shifted by a predetermined amount toward the front surface in the first direction, and is closer to the support point than the position based on the cracking load. (15) The display device according to any one of (1) to (13) above, wherein in a third direction from the first side wall toward the second side wall, the thickness of at least one of the first side wall and the second side wall is thinner in the portion closer to the bottom surface than in the portion further away from the bottom surface, and even at the same distance from the bottom surface, one portion is thinner than other portions. (16) The axial force of the screw is 2000 [N], the detachment load is 890 [N], the cracking load is 380 [MPa], the range further from the support point than the position based on the detachment load is a range where the distance from the bottom surface to the rear wall erected opposite the rear surface is 12 [mm] or more, the position closer to the support point than the position based on the cracking load is a position where the distance is 29 [mm] or less, and the contact position is a position where the distance is 12 [mm] or more and 29 [mm] or less, the display device according to (2) above.(17) The display device according to (16), wherein, when the axial force of the screw is 3000 [N], the range further from the support point than the position based on the detachment load is a range where the distance from the bottom surface to the rear wall erected opposite the rear surface is 8 [mm] or more, the position on the support point side of the position based on the cracking load is a position where the distance is 20 [mm] or less, and the contact position is a position where the distance is 12 [mm] or more and 20 [mm] or less. (18) The display device according to (17), wherein, when the base is shifted by 1 [mm] in the first direction toward the front surface, the range further from the support point than the position based on the detachment load is a range where the distance is 12 [mm] or more, the position on the support point side of the position based on the cracking load is a position where the distance is 30 [mm] or less, and the contact position is a position where the distance is 12 [mm] or more and 20 [mm] or less. (19) The display device according to (18), wherein the contact position is defined by the inclination of the screw with respect to the lower surface, and the through hole extending in a direction oblique to the normal direction of the lower surface is closer to the bottom surface and closer to the pivot point, the position based on the length of the screw and the range of the length of the through hole defined from the angle range in which the screw can be tightened is in the range where the distance is 14 [mm] or more, and the contact position is a position where the distance is 14 [mm] or more and 20 [mm] or less. (20) The display device according to (19), wherein the inclination of the screw with respect to the lower surface is 21°, and the distance is 18 [mm].

[0072] 10 Base 12 Mount 14 Stay 16 Support part 18 Monitor 20 Front part 22 Rear part 30 Top surface 32 Bottom surface 34 Side 36 Front 38 Rear surface 50 Base housing part 52 Bottom surface 54 Side wall 58 Rear wall 60 Mount body 62 Sliding surface 70 Thin wall part 72 Pivot part 74 Through hole 80 Mounting screw 82 Tip part 90 Contact position 100 Display device 200 Imaging device 300 In-vehicle display system 400 Windshield 410 Seat 420 Occupant 1000 Vehicle

Claims

1. A trapezoidal columnar base including an upper surface fixed to a vehicle, a lower surface larger in area than the upper surface and facing the opposite direction from the upper surface, a first side surface positioned between the lower surface and the upper surface, and a second side surface positioned on the opposite side of the first side surface, is slidably assembled to a trapezoidal columnar base along a first direction extending from the rear surface of the base toward the front surface facing the opposite direction from the rear surface, while surrounding the first side surface, the lower surface and the second side surface; a mounting member supported by the mount with a variable length of a protruding portion that protrudes along a second direction toward the lower surface from the bottom surface of the mount facing the lower surface; a stay connected to the mount; and a monitor supported by the stay, wherein the mount has a bottom surface, a first side wall erected from the bottom surface facing the first side surface, and a second side wall erected from the bottom surface facing the second side surface, and the first side wall and the second side wall each have a sliding surface that extends along the first direction facing the first side surface and the second side surface, respectively. The protruding portion contacts the lower surface and applies a force along the second direction, giving the base a rotational moment based on the force along the second direction, with the contact point between the rear side of the lower surface and the bottom surface as the fulcrum; the sliding surfaces of the first and second side walls are pressed against the first and second sides of the base, respectively, which are subjected to the rotational moment; the contact position of the protruding portion with the lower surface is in a range further from the fulcrum than the position based on the detachment load that causes the mount to detach from the base, and closer to the fulcrum than the position based on the cracking load that causes the mount to break due to the pressure against the base; a display device.

2. The bottom surface has one opening of a through hole with screw threads, the mounting member is a screw that is inserted and screwed in through the other opening of the through hole, and the force along the second direction is the axial force of the screw, the display device according to claim 1.

3. The display device according to claim 1 or 2, wherein the detachment load is a condition for the frictional force generated on the contact surface between the base and the mount in response to the rotational moment, and the cracking load is a condition for the stress generated on the sliding surface in response to the rotational moment.

4. The display device according to claim 1 or 2, wherein the failure of the mount is the failure of at least one of the first side wall and the second side wall.

5. The display device according to claim 1 or claim 2, wherein the contact position is defined by the distance from the end of the bottom surface on the side of the pivot point, or by the ratio of said distance to the length of the bottom surface in the first direction.

6. The contact position is closer to the fulcrum as the force along the second direction increases, as described in claim 1 or claim 2.

7. The contact position is closer to the pivot point as the tightening torque of the screw increases, the display device according to claim 2.

8. The contact position is closer to the support point the smaller the crack load, as described in claim 1 or claim 2.

9. The contact position is closer to the fulcrum the smaller the detachment load, as described in claim 1 or claim 2.

10. The display device according to claim 1 or 2, wherein the contact position is defined by the inclination of the protruding portion with respect to the lower surface, and is on the side of the fulcrum rather than the side of the protruding portion with respect to the bottom surface.

11. The display device according to claim 2, wherein the contact position is defined by the inclination of the screw with respect to the lower surface, and the through hole extends in a direction oblique to the normal direction of the lower surface, with the closer it is to the bottom surface, the closer it is to the pivot point.

12. The display device according to claim 11, wherein the contact position is further based on the length of the screw and the range of the length of the through hole defined by the angle range in which the screw can be tightened.

13. The display device according to claim 1 or claim 2, wherein the side of the support point facing the bottom surface is a curved portion formed between the bottom surface and a rear wall erected from the bottom surface facing the rear surface.

14. The display device according to claim 1 or 2, wherein the contact position is a position that is further from the support point than the position based on the detachment load, when the base is shifted by a predetermined amount toward the front surface in the first direction, and is closer to the support point than the position based on the cracking load.

15. In a third direction from the first side wall toward the second side wall, the thickness of at least one of the first side wall and the second side wall is thinner in the portion closer to the bottom surface than in the portion further away from the bottom surface, and even at the same distance from the bottom surface, one portion is thinner than other portions, the display device according to claim 1 or claim 2.

16. The axial force of the screw is 2000 [N], the detachment load is 890 [N], the cracking load is 380 [MPa], the range further from the support point than the position based on the detachment load is a range where the distance from the bottom surface to the rear wall erected opposite the rear surface is 12 [mm] or more, the position closer to the support point than the position based on the cracking load is a position where the distance is 29 [mm] or less, and the contact position is a position where the distance is 12 [mm] or more and 29 [mm] or less, the display device according to claim 2.

17. When the axial force of the screw is 3000 [N], the range further from the support point than the position based on the detachment load is a range where the distance from the bottom surface to the rear wall erected opposite the rear surface is 8 [mm] or more, the position closer to the support point than the position based on the cracking load is a position where the distance is 20 [mm] or less, and the contact position is a position where the distance is 12 [mm] or more and 20 [mm] or less, the display device according to claim 16.

18. The display device according to claim 17, wherein, when the base is shifted by 1 mm toward the front surface in the first direction, the range further from the support point than the position based on the detachment load is a range where the distance is 12 mm or more, the position closer to the support point than the position based on the cracking load is a position where the distance is 30 mm or less, and the contact position is a position where the distance is 12 mm or more and 20 mm or less.

19. The display device according to claim 18, wherein the contact position is defined by the inclination of the screw with respect to the lower surface, and the through hole extending in a direction oblique to the normal direction of the lower surface is closer to the bottom surface and closer to the pivot point, the position based on the length of the screw and the range of the length of the through hole defined by the angle range in which the screw can be tightened is in the range where the distance is 14 [mm] or more, and the contact position is a position where the distance is 14 [mm] or more and 20 [mm] or less.

20. The display device according to claim 19, wherein the inclination of the screw with respect to the lower surface is 21° and the distance is 18 [mm].

Images