Vehicle-mounted accessory device mounted on vehicle, vehicle-mounted display system

A mount is slid with respect to a base to build an assembly, the base including an upper surface fixed to a vehicle, a lower surface facing a direction opposite to that of the upper surface, a first lateral surface located between the lower surface and the upper surface, and a second lateral surface located between the lower surface and the upper surface and located opposite to the first lateral surface. The mount includes a bottom surface facing the lower surface, a first lateral wall joined to the bottom surface and facing the first lateral surface, and a second lateral wall joined to the bottom surface and facing the second lateral surface. A thickness of the first lateral wall in a direction from the first lateral wall to the second lateral wall is smaller in a first lower portion than in a first upper portion.

BACKGROUND

The present disclosure relates to a vehicle-mounted accessory device and a vehicle-mounted display system mounted on a vehicle.

2. Description of the Related Art

A vehicle cabin mirror for rear view monitoring is provided in a vehicle cabin. A vehicle cabin mirror is required not to injure the head of a passenger when, for example, the head of the passenger is hit by the vehicle cabin mirror in a collision accident of the vehicle etc. A method is known whereby, for example, the vehicle cabin mirror is dropped without leaving edged portions so as not to injure the head of a passenger. Studies have been made on a method of moderating an impact on the head of a passenger applied when the vehicle cabin mirror hits the head of a passenger, by rotating the vehicle cabin mirror around an axis between the base adhesively attached to the front windshield and the stay joined to the base. Meanwhile, the base adhesively attached to the front windshield is mounted on a base inner with an open top and an open back via a linear spring having a pair of linear parts and a curved part. The vehicle cabin mirror is coupled to the base inner. When a collision occurs, the linear parts of the linear spring make a sliding motion so that the linear spring, the base inner, and the vehicle cabin mirror are moved to the front. The movement causes the vertical wall of the base inner to be hit by the base and is broken, and the base inner continues to be moved to the front and is dropped (see, for example, patent literature 1).

According to the related art, the linear spring is provided between the base and the base inner. Meanwhile, a simple structure with a small number of components is preferred for the purpose of inhibiting an increase in the manufacturing cost. Also, a display device may be mounted in place of the vehicle cabin mirror, and the vehicle cabin mirror and the display device are inclusively referred to as accessories. There is a need to remove an impacted accessory irrespective of the type of accessory.

SUMMARY

The present disclosure addresses the above-described issue, and an illustrative purpose thereof is to provide a technology for removing an impacted accessory by means of a simple structure.

A vehicle-mounted accessory device according to an embodiment of the present disclosure includes: a mount that is slid with respect to a base to build an assembly, the base including an upper surface fixed to a vehicle, a lower surface facing a direction opposite to that of the upper surface, a first lateral surface located between the lower surface and the upper surface, and a second lateral surface located between the lower surface and the upper surface and located opposite to the first lateral surface; a stay that is joined to the mount; and an accessory that is supported by the stay. The mount includes a bottom surface facing the lower surface, a first lateral wall joined to the bottom surface and facing the first lateral surface, and a second lateral wall joined to the bottom surface and facing the second lateral surface, The mount surrounds the first lateral surface, the second lateral surface, and the lower surface when the mount is fitted to the base, and a thickness of the first lateral wall in a direction from the first lateral wall to the second lateral wall is smaller in a first lower portion than in a first upper portion, and the first lower portion is closer to the bottom surface than the first upper portion.

DETAILED DESCRIPTION

The knowledge that provides the basis of an embodiment of the present disclosure will be discussed before discussing the embodiment in specific details. The embodiment relates to a vehicle-mounted display system in which a display device is used as an example of the accessory. In the vehicle-mounted display system, an imaging device is provided toward the back of the vehicle, a display device is provided in the vehicle toward the top of the front windshield, and the display device displays an image captured by the imaging device. The base inner according to the related art joined to the vehicle cabin mirror is identified as a mount. The mount is made of a resin, and the base is made of a metal to make sure that the vertical wall of the mount is easily broken. A display device, which exemplifies the accessory, is required not to sway easily even when the vehicle is shaken in the absence of an impact. To ensure that the display device does not sway easily, it is preferred that the mount be made of a material more rigid than resin (e.g., metal).

There is a need to remove an impacted display device even when the mount is configured to have a high rigidity. In other words, the mount is required to meet the requirements for difficulty to sway in the absence of an impact and for easiness to remove the accessory in the event that an impact is applied. Further, a simple structure with a small number of components is called for to inhibit an increase in the manufacturing cost. The terms “parallel” and “orthogonal” in the following description not only encompass completely parallel or orthogonal but also encompass slightly off-parallel and off-orthogonal within the margin of error. The term “substantially” means identical within certain limits.

FIG. 1shows a structure of a vehicle1000. The right side ofFIG. 1corresponds to the front side of the vehicle1000. The vehicle1000includes a vehicle-mounted accessory device100, an imaging device200, a front windshield400, a seat410, and a passenger420. As shown inFIG. 1, an orthogonal coordinate system formed by an x axis, y axis, and a z axis is defined. The x axis extends along the front windshield400and so has the same angle of inclination as the angle of inclination of the front windshield400. The y axis is orthogonal to the x axis and extends in the transversal direction of the vehicle1000. Therefore, the x-y plane matches the plane of the front windshield400. The z axis is perpendicular to the x axis and the y axis and extends in the direction of the normal to the front windshield400. The positive directions of the x axis, y axis, and z axis are defined in the directions of arrows inFIG. 1, and the negative directions are defined in the directions opposite to those of the arrows.

The positive direction of the x axis is an ascending direction extending backward along the front windshield400relative to the vehicle1000, and the negative direction of the x axis is a descending direction extending forward along the front windshield400relative to the vehicle1000. Further, the positive direction of the z axis is a direction of the normal extending forward from the front windshield400relative to the vehicle1000, and the negative direction of the z axis is a direction of the normal extending backward from the front windshield400relative to the vehicle1000. Hereinafter, the positive direction of the x axis may be referred to as “rear”, “rearward”, the negative direction of the x axis may be referred to as “front”, “frontward”, the positive direction of the y axis may be referred to as “left”, “leftward”, the negative direction of the y axis may be referred to as “right”, “rightward”, the positive direction of the z axis may be referred to as “upward”, “upper”, and the negative direction of z axis may be referred to as “downward” or “lower”. “Rear” and “front” defined along the x axis differ from “rear” and “front” defined relative to the vehicle1000, and “upward” and “downward” defined along the z axis differ from “upward” and “downward” defined relative to the vehicle1000, but the respective pairs may be used without making a clear distinction.

A vehicle-mounted display system300includes the vehicle-mounted accessory device100and the imaging device200. The imaging device200is provided in a rear portion of the vehicle1000and images a scene behind the vehicle1000. The imaging device200may be directly connected to the vehicle-mounted accessory device100or connected to the vehicle-mounted accessory device100via an Electronic Control Unit (ECU) (not shown). For such connection, wireless communication, wired communication, or a combination thereof is used. The imaging device200outputs the captured image to the vehicle-mounted accessory device100.

The vehicle-mounted accessory device100is provided on the front windshield400in the vehicle1000, and, in particular, in the central portion of the front windshield400in the transversal direction. The seat410is provided at a rearward position in the vehicle1000relative to the vehicle-mounted accessory device100, and the passenger420is seated in the seat410. In the case the seat410is a driver's seat, the passenger420represents the driver. The vehicle-mounted accessory device100receives an image from the imaging device200and displays the image for the passenger420of the vehicle1000. Therefore, the vehicle-mounted accessory device100is the aforementioned display device and displays the image inside the vehicle1000.

FIG. 2is a perspective view showing a structure of the vehicle-mounted accessory device100,FIG. 3is a top view showing a structure of the vehicle-mounted accessory device100, andFIG. 4is an A-A′ cross-sectional view ofFIG. 3showing a structure of the vehicle-mounted accessory device100. The vehicle-mounted accessory device100includes a base10, a mount12, a stay14, a joint plate16, and a display device18.

The base10includes an upper surface30, a lower surface32, and a first lateral surface34aand a second lateral surface34b, which are generically referred to as lateral surfaces34, a front surface36, and a rear surface38. The base10has a plate shape and is made of a hard material such as metal. The upper surface30is a surface of the base10facing upward and is fixed to the front windshield400by using, for example, an adhesive, etc. The anchorage strength is defined such that the base10does not drop from the front windshield400in the case the mount12, the stay14, the joint plate16, and the display device18, which will be described later, receive an external impact force when the vehicle1000is halted abruptly or collides with something. The upper surface30is configured to be longer in the longitudinal direction than in the transversal direction.

The lower surface32is a surface of the base10facing downward, i.e., a surface facing a direction opposite to that of the upper surface30. The lower surface32is also configured to be longer in the longitudinal direction than in the transversal direction. The first lateral surface34ais a surface of the base10located between the lower surface32and the upper surface30and located leftward. The first lateral surface34ahas a rectangular shape elongated in the longitudinal direction and is inclined such that the closer to the lower surface32, the further leftward the first lateral surface34ais located. The second lateral surface34bis a surface of the base10located between the lower surface32and the upper surface30and located rightward. That a surface is located rightward means, for example, that the surface is located opposite to the first lateral surface34a. Therefore, the second lateral surface34bis located opposite to the first lateral surface34ain the base10. The second lateral surface34bhas a rectangular shape elongated in the longitudinal direction and is inclined such that the closer to the lower surface32, the further rightward the second lateral surface34bis located.

Thus, since the first lateral surface34aand the second lateral surface34bare inclined such that the closer to the lower surface32, the farther spaced apart the surfaces are from each other. Therefore, the length of the lower surface32in the transversal direction is longer than the length of the upper surface30in the transversal direction. Thus, the first lateral surface34aand the second lateral surface34bare inclined as if to spread out from the upper surface30toward the lower surface32. That the first lateral surface34ais inclined as if to spread out from the upper surface30toward the lower surface32means, for example, that the first lateral surface34ais inclined to be distanced from the second lateral surface34bin a direction from the upper surface30toward the lower surface32. That the second lateral surface34bis inclined as if to spread out from the upper surface30toward the lower surface32means, for example, that the second lateral surface34bis inclined to be distanced from the first lateral surface34ain a direction from the upper surface30toward the lower surface32. The angle formed by the first lateral surface34aand the upper surface30and the angle formed by the second lateral surface34band the upper surface30are identical.

The front surface36is a surface of the base10located between the lower surface32and the upper surface30and located frontward. The front surface36has a rectangular shape elongated in the transversal direction and extends substantially perpendicular with respect to the upper surface30and the lower surface32. The rear surface38is a surface of the base10located between the lower surface32and the upper surface30and located rearward. The left and right sides of the rear surface38are curved to extend forward and are contiguous with the first lateral surface34aand the second lateral surface34b. The central portion of the rear surface38in the transversal direction extends linearly and is substantially parallel to the front surface36.

The mount12includes a base housing50, a bottom surface52, a first lateral wall54aand a second lateral wall54b, which are generally referred to as lateral walls54, a rear wall58, and a mount main body60. The mount main body60has a box shape elongated in the longitudinal direction and has a size larger than the base10. The base housing50capable of housing the base10is formed in the mount main body60. The base housing50has an open top and an open front. The base10is inserted and slid in a front-to-rear direction to build an assembly. That the base10is slid to build an assembly means, for example, that the base10can be mounted to the base housing50by sliding the base10. The base housing50configured as described above is bounded by the bottom surface52, the first lateral wall54a, the second lateral wall54b, and the rear wall58. The bottom surface52is a surface oriented upward to face the lower surface32of the base10when the base10is slid into the base housing50to build the assembly. The bottom surface52has the same shape as the lower surface32in the x-y plane to enable the sliding base assembly. It should be noted that the bottom surface52may be larger than the lower surface32within the margin of error.

The first lateral wall54ais provided on the left of the bottom surface52to rise upward from the bottom surface52. Being provided to rise upward from the bottom surface52means, for example, being joined to the bottom surface52and facing the first lateral surface34a. When the base10is slid into the base housing50to build the assembly, the first lateral wall54aextends longitudinally to face the first lateral surface34a. Meanwhile, the second lateral wall54bis provided on the right of the bottom surface52to rise upward from the bottom surface52. Being provided to rise upward from the bottom surface52means, for example, being joined to the bottom surface52and facing the second lateral surface34b. When the base10is slid into the base housing50to build the assembly, the second lateral wall54bextends longitudinally to face the second lateral surface34b.

The right surface of the first lateral wall54aconfigured as described above is inclined to conform to the inclination of the first lateral surface34asuch that the closer to the bottom surface52, the further leftward the right surface is located. Being inclined to conform to the inclination of the first lateral surface34asuch that the closer to the bottom surface52, the further leftward the location means, for example, being inclined to conform to the inclination of the first lateral surface34a. Meanwhile the left surface of the first lateral wall54aextends substantially perpendicularly with respect to the bottom surface52without being inclined. For this reason, the thickness of the first lateral wall54ain the direction from the first lateral wall54atoward the second lateral wall54b, i.e., in the transversal direction, is smaller in a portion close to the bottom surface52(a first lower portion) than in a portion distanced from the bottom surface52(a first upper portion). Further, the left surface of the second lateral wall54bis inclined to conform to the inclination of the second lateral surface34bsuch that the closer to the bottom surface52, the further rightward the left surface is located. Being inclined to conform to the inclination of the second lateral surface34bsuch that the closer to the bottom surface52, the further rightward the location means, for example, being inclined to conform to the inclination of the second lateral surface34b. Meanwhile the right surface of the second lateral wall54bextends substantially perpendicularly with respect to the bottom surface52without being inclined. For this reason, the thickness of the second lateral wall54bin the transversal direction is smaller in a portion close to the bottom surface52(a second lower portion) than in a portion distanced from the bottom surface52(a second lower portion).

The rear wall58extends in the transversal direction. The left and right sides of the rear surface38are curved forward and are contiguous with the first lateral wall54aand the second lateral wall54b. The rear wall58has a shape that conforms to the rear surface38of the base10. The rear wall58has a role of a stopper that stops the insertion of the base10by being in contact with the rear surface38of the base10inserted into the base housing50in the front-to-rear direction.

The transversal cross section of the base housing50bounded by the first lateral wall54a, the bottom surface52, and the second lateral wall54bis inclined such that the cross section extends longer in the top-to-bottom direction. The transversal cross section of the base10is also inclined such that it extends longer in the top-to-bottom direction. By matching the angles of inclination of the base housing50and the base10configured as describe above, it is possible to slide the base10, inserted in the front-to-back direction, to build the assembly. Because of the sliding base assembly, the downward and forward movement of the mount12are limited by the lateral surfaces34and the rear surface38of the base10. As a result, the mount12is prevented from dropping from the base10.

A thin-wall portion70is provided in the central portion of the first lateral wall54ain the longitudinal direction. The transversal length of the first lateral wall54ain the thin-wall portion70is smaller than the transversal length of the first lateral wall54ain the portion other than the thin-wall portion70. The relationship between the lengths in these two portions is maintained irrespective of the distance (e.g., the minimum distance) from the bottom surface52. To describe it in specific details, the transversal length in the thin-wall portion70at a position distanced from the bottom surface52, i.e., at a position where the transversal length of the first lateral wall54ais relatively large, is smaller than the transversal length in the portion other than the thin-wall portion70. Also, the transversal length in the thin-wall portion70at a position close to the bottom surface52, i.e., at a position where the transversal length of the first lateral wall54ais relatively small, is smaller than the transversal length in the portion other than the thin-wall portion70. In this way, the thickness of the first lateral wall54ain the transversal direction is, given the same distance from the bottom surface52, smaller in the thin-wall portion70than elsewhere. In other words, the first lateral wall54ahas a first portion and a second portion that are equally distanced from the bottom surface52. The thickness in the first portion in the direction from the first lateral wall54ato the second lateral wall54bis smaller than that of the second portion. The first portion is, for example, the thin-wall portion70, and the second portion is, for example, the portion in the first lateral wall54aother than the thin-wall portion70. The second portion may be the entirety of the first lateral wall54aexcluding the thin-wall portion70.

The thin-wall portion70is also provided in the central portion of the second lateral wall54bin the longitudinal direction. The thin-wall portion70in the second lateral wall54bis located at substantially the same position as the thin-wall portion70in the first lateral wall54ain the longitudinal direction. Further, the structure of the thin-wall portion70in the second lateral wall54bis substantially identical to the structure of the thin-wall portion70in the first lateral wall54a. The thickness of the second lateral wall54bin the transversal direction is, given the same distance from the bottom surface52, smaller in the thin-wall portion70than elsewhere. In other words, the second lateral wall54bhas a third portion and a fourth portion that are equally distanced from the bottom surface52. The thickness in the third portion in the direction from the first lateral wall54ato the second lateral wall54bis smaller than that of the fourth portion. The third portion is, for example, the thin-wall portion70, and the fourth portion is, for example, the portion in the second lateral wall54bother than the thin-wall portion70. The fourth portion may be the entirety of the second lateral wall54bexcluding the thin-wall portion70.

The mount12is formed as one piece. The mount12is manufactured by using a metal such as aluminum, magnesium, and zinc. Further, the mount12may be made of an alloy such as an aluminum alloy exemplified by ADC12. The mount12may be made of a glass with filler or a resin with a filler. In this case, the filler may be glass or carbon fiber. Thus, the mount12is a rigid body. A rigid body means an object that is not deformed when the mount12is assembled with the base10by sliding the base10.

The stay14is joined to the lower part of the mount main body60. The stay14extends downward and rearward from the mount12, forming a curve, and is joined to a rear portion22of the display device18. The joint plate16having a curved shape is provided in the portion in the rear portion22joined to the stay14. A publicly known technology may be used for the joint between the mount main body60and the stay14, the joint between the stay14and the rear portion22, the structure of the stay14, and the structure of the joint plate16so that a description thereof is omitted. For example, the stay14and the joint plate16are manufactured from a resin member. Alternatively, the stay14and the mount12, or the stay14and the mount main body60may respectively be formed as one piece. In this case, the stay14is made of the same material as the mount12and so may be a rigid body like the mount12.

The display device18has a box shape elongated in the transversal direction and is supported by the stay14. The rear portion22joined to the stay14and a surface portion20opposite to the rear portion22are provided in the display device18. The rear portion22is shaped such that the central portion in the transversal direction projects with respect to the end portions. The display device18exemplifies the accessory and displays an image captured by the imaging device200ofFIG. 1on a monitor (not shown) provided in the surface portion20. For example, the monitor is a liquid crystal display or an organic electro-luminescence (EL) display. The display device18includes a function to receive an image, a function to play back an image, and a function to display an image. Therefore, the weight of the display device18is generally greater than the weight of the vehicle cabin mirror. A publicly known technology may be used for these functions so that a description thereof is omitted.

The thickness of the lateral walls54in the transversal direction will be described below in further details by usingFIGS. 5A-5C. The first lateral wall54awill be described as exemplifying the lateral walls54, but the second lateral wall54bhas the same structure except that the structure thereof mirrors that of the first lateral wall54a.FIGS. 5A-5Dshow sizes in the structure of the vehicle-mounted accessory device100.FIG. 5Ais a top view showing a structure of the base10and the mount12and is an illustration similar toFIG. 3.FIG. 5Bis an A-A′ cross-sectional view ofFIG. 5A.FIG. 5Bis similar toFIG. 4Bbut shows the vicinity of the first lateral wall54a. As illustrated, a position P1and a position P2are defined in the vertical direction of the first lateral wall54a. The position P1represents the aforementioned position close to the bottom surface52, and the position P2represents the aforementioned position distanced from the bottom surface52. The definition of the position P1and the position P2as described above remains unchanged inFIGS. 5C-5Ddescribed later. The transversal thickness of the first lateral wall54ain the thin-wall portion70is “1.2 mm” at the position P1and “2.5 mm” at the position P2. Thus, the thickness at the position P1is configured to be “½” the thickness at the position P2or smaller.

FIG. 5Cis a B-B′ cross-sectional view ofFIG. 5A. The transversal thickness of the first lateral wall54ain the portion other than the thin-wall portion70is “3.4 mm” at the position P1and “4.7 mm” at the position P2.FIG. 5Dis a C-C′ cross-sectional view ofFIG. 5A. The transversal thickness of the first lateral wall54ain the portion other than the thin-wall portion70is “2.6 mm” at the position P1and “4.0 mm” at the position P2. Thus, the thickness at the position P1is configured to be more than “½” the thickness at the position P2in the portion other than the thin-wall portion70.

As described above, the mount12is manufactured from a rigid body so that the display device18does not sway easily even when the vehicle1000is shaken in the absence of an impact. Meanwhile, the transversal thickness of the lateral walls54at the position P1is smaller than the thickness at the position P2so that the lateral walls54are easily broken in the neighborhood of the position P1(e.g., a position P3or a position P4inFIG. 4) in the event that an impact is applied. The breaking of the lateral walls54makes it easier for the display device18to drop in the event that an impact is applied. Further, since the transversal thickness of the lateral walls54in the thin-wall portion70is configured to be smaller than elsewhere, it is further ensured that the lateral walls54are easily broken in the neighborhood of the position P in the event that an impact is applied. Further, since the base10is slid into the mount12to build the assembly without being mediated by a linear spring, etc., the number of components is reduced, and the system is realized with a simple structure.

The shape of the base10and the lateral walls54is not limited to the one described above.FIG. 6is a partial cross-sectional view showing a structure of the vehicle-mounted accessory device100according to a variation. The figure shows the same portion as shown inFIG. 5B. The first lateral surface34adescribed so far has a cross section inclined such that the closer to the lower surface32, the further leftward the first lateral surface34ais located. Meanwhile, the first lateral surface34aaccording to the variation is shaped like a step such that the closer to the lower surface32, the further leftward the first lateral surface34ais located.FIG. 6shows “2” steps, but the number of steps is not limited to this. The right surface of the first lateral wall54ais shaped like a step to conform to the step shape of the first lateral surface34asuch that the closer to the bottom surface52, the further leftward the right surface is. The number of steps in the step shape of the first lateral wall54ais equal to the number of steps in the step shape of the first lateral surface34a. Meanwhile, the left surface of the first lateral wall54ais not inclined and extends substantially perpendicular to the bottom surface52. For this reason, the thickness of the first lateral wall54ain the transversal direction is smaller at the position P1close to the bottom surface52than at the position P2distanced from the bottom surface52. Further, the second lateral surface34bhas a shape horizontally symmetrical to that of the first lateral surface34a, and the second lateral wall54bhas a shape horizontally symmetrical to that of the first lateral wall54a.

According to this variation, the mount is provided with the bottom surface, the first lateral wall, and the second lateral wall. The thickness of the first lateral wall in the transversal direction is smaller in a portion close to the bottom surface than in a portion distanced from the bottom surface. Accordingly, a simple structure ensures that the first lateral wall is broken in the event that an impact is applied. Further, since the first lateral wall is broken in the event that an impact is applied, the accessory can be removed in the event that an impact is applied. Further, since the first lateral wall is inclined to conform to the first lateral surface inclined as if to spread out from the upper surface toward the lower surface, the sliding base assembly is realized by means of a simple structure. Further, since the first lateral wall is inclined to conform to the first lateral surface inclined as if to spread out from the upper surface toward the lower surface, the mount can be fixed to the base.

Further, the thickness of the second lateral wall in the transversal direction is smaller in a portion close to the bottom surface than in a portion distanced from the bottom surface. Accordingly, a simple structure ensures that the second lateral wall is broken in the event that an impact is applied. Further, since the second lateral wall is broken in the event that an impact is applied, the accessory can be removed in the event that an impact is applied. Further, since the second lateral wall is also inclined to conform to the second lateral surface inclined as if to spread out from the upper surface toward the lower surface, the sliding base assembly is realized by means of a simple structure. Further, since the second lateral wall is inclined to conform to the second lateral surface inclined as if to spread out from the upper surface toward the lower surface, the mount can be fixed to the base.

Further, since the thickness of the first lateral wall is, given the same distance from the bottom surface, configured to be smaller in a portion than in the other portion, the accessory can be removed in the event that an impact is applied. Further, since the thickness of the second lateral wall is, given the same distance from the bottom surface, configured to be smaller in a portion than in the other portion, the accessory can be removed in the event that an impact is applied. Further, since the mount is manufactured from a rigid body, it is ensured that the accessory does not sway easily when the vehicle is shaken in the absence of an impact. Further, even in the case of using a display device as the accessory, a simple structure ensures that the accessory can be removed.

One embodiment of the present disclosure is summarized below. A vehicle-mounted accessory device according to an embodiment of the present disclosure includes: a mount that is slid into a base to build an assembly, the base including an upper surface fixed to a vehicle, a lower surface facing a direction opposite to that of the upper surface, a first lateral surface located between the lower surface and the upper surface, and a second lateral surface located between the lower surface and the upper surface and located opposite to the first lateral surface; a stay that is joined to the mount; and an accessory that is supported by the stay. The mount includes a bottom surface facing the lower surface, a first lateral wall joined to the bottom surface and facing the first lateral surface, and a second lateral wall joined to the bottom surface and facing the second lateral surface. The mount surrounds the first lateral surface, the second lateral surface, and the lower surface when the mount is fitted to the base, and a thickness of the first lateral wall in a direction from the first lateral wall to the second lateral wall is smaller in a first lower portion than in a first upper portion, and the first lower portion is closer to the bottom surface than the first upper portion.

According to this embodiment, the mount is provided with the bottom surface, the first lateral wall, and the second lateral wall, and the thickness of the first lateral wall in the transversal direction is smaller in the first lower portion than in the first upper portion. Accordingly, a simple structure ensures that the accessory can be removed in the event that an impact is applied.

The first lateral surface is inclined to be distanced from the second lateral surface in a direction from the upper surface toward the lower surface, and the first lateral wall is inclined to conform to an inclination of the first lateral surface. In this case, since the first lateral wall is inclined to conform to the first lateral surface inclined as if to spread out from the upper surface toward the lower surface, the sliding base assembly is realized by means of a simple structure.

A thickness of the second lateral wall in a direction from the first lateral wall to the second lateral wall is smaller in a second lower portion than in a second upper portion, and the second lower portion is closer to the bottom surface than the second upper portion. In this case, the thickness of the second lateral wall in the transversal direction is smaller in the second lower portion than in the second upper portion. Accordingly, a simple structure ensures that the accessory can be removed in the event that an impact is applied.

The second lateral surface is inclined to be distanced from the first lateral surface in a direction from the upper surface toward the lower surface, and the second lateral wall is inclined to conform to an inclination of the second lateral surface. In this case, since the second lateral wall is also inclined to conform to the second lateral surface inclined as if to spread out from the upper surface toward the lower surface, the sliding base assembly is realized by means of a simple structure.

The first lateral wall includes a first portion and a second portion equally distanced from the bottom surface, and the thickness of the first lateral wall in the direction from the first lateral wall to the second lateral wall is smaller in the first portion than in the second portion. In this case, since the thickness of the first lateral wall is, given the same distance from the bottom surface, configured to be smaller in a portion than in the other portion, the accessory can be removed in the event that an impact is applied.

The second lateral wall includes a third portion and a fourth portion equally distanced from the bottom surface, and a thickness of the second lateral wall in the direction from the first lateral wall to the second lateral wall is smaller in the third portion than in the fourth portion. In this case, since the thickness of the second lateral wall is, given the same distance from the bottom surface, configured to be smaller in a portion than in the other portion, the accessory can be removed in the event that an impact is applied.

The mount and the stay are formed as one piece. In this case, the number of components is reduced. Further, since the rigidity is improved by forming the mount and the stay as one piece, it is ensured that the accessory does not sway easily when the vehicle is shaken in the absence of an impact, and that the impact is easily transferred to the first lateral wall in the event that an impact is applied and breaks the first lateral wall. Further, since the first lateral wall is broken in the event that an impact is applied, the accessory can be removed in the event that an impact is applied.

The mount is a rigid body. In this case, since the mount is manufactured from a rigid body, it is ensured that the accessory does not sway easily when the vehicle is shaken in the absence of an impact.

A system may include: an imaging device that captures an image; and the vehicle-mounted accessory device. The accessory displays an image captured by the imaging device. In this case, a simple structure ensures that the accessory can be removed in the event that an impact is applied even when the display device is used as the accessory.

In the embodiment, the display device18is used as the accessory. The embodiment is non-limiting as to the type of accessory, and a vehicle cabin mirror may be used as the accessory. According to this variation, the scope of application of the embodiment is expanded.

CROSS-REFERENCE TO RELATED APPLICATION

This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2018-233785, filed on Dec. 13, 2018, the entire contents of which are incorporated herein by reference.