JP7055576B2 - Rear monitoring device - Google Patents

Description

The present invention relates to a rearward monitoring device that is attached to a vehicle and is used to monitor the rearward state on the opposite side of the traveling direction.

Patent Document 1 describes an invention relating to an antiglare mirror for a vehicle, which is an example of a rear monitoring device.
This anti-glare mirror for a vehicle is connected to a stay attached to the vehicle body side so that a concave spherical tilt bearing formed on a cover can be tilted in each direction. A body is supported on the cover so as to be tiltable with the tilt axis as a fulcrum, and a mirror surface is held by the body.

The cover and body are connected using a clip spring and an operating lever. Both ends of the clip spring are fixed to the cover. The lever shaft formed in the middle portion of the operating lever is rotatably supported by the lever bearing formed on the body, and the knob portion projects downward from the cover. A groove formed on the side opposite to the knob portion of the operating lever is engaged with the intermediate portion of the clip spring.

As shown in FIG. 4, in the antiglare mirror for a vehicle described in Patent Document 1, when the body is arranged parallel to the cover, the operation lever is tilted in the direction in which the knob portion moves toward the stay side. , The tilt of the operating lever is stable due to the clip spring. When the knob portion of the operating lever is pulled in the opposite direction to the stay side from this state and passed through the dead point shown in FIG. 7, the urging direction of the clip spring is reversed and the operating lever is tilted to the state shown in FIG. Stabilize. At this time, the body rotates with respect to the cover with the tilting axis as a fulcrum, and the direction of the mirror surface in the vehicle can be changed.

Japanese Unexamined Patent Publication No. 11-208373

In the antiglare mirror for a vehicle described in Patent Document 1, a cover and a body that are tiltably supported by a stay are connected to each other using substantially only an operation lever. Further, the rotation direction of the operating lever and the tilting direction of the body accompanying the rotation direction coincide with each other. Therefore, when trying to change the reflection direction of the mirror surface by tilting the body held by hand together with the cover using the concave spherical tilt bearing as a fulcrum, the operation lever is not operated in conjunction with the movement of the body. Despite this, malfunctions that rotate are likely to occur.

For example, as shown in FIG. 4, when the body is arranged parallel to the cover, the body is held by hand and the upper part of the body is pushed toward the stay to change the reflection direction of the mirror surface without operating the operation lever. When trying to turn it upward, the lever shaft of the operating lever is pulled by the body, the operating lever rotates arbitrarily, and the lower end of the body is likely to be separated from the cover.

This is the same when the lower end of the body is pushed in the stay direction and the reflection direction of the mirror surface is directed downward from the state of FIG. 8 without operating the operation lever. Also at this time, the operation lever is inadvertently rotated, and the lower end of the body is likely to come into close contact with the cover.

The present invention solves the above-mentioned conventional problems, and is designed to prevent the operation member from malfunctioning when the main body portion is held by hand and the direction of the rear reflection function portion is changed. The purpose is to provide the device.

The present invention includes a support member attached to a vehicle, a tilting member rotatably connected to the support member, a main body rotatably supported by the tilting member with a rotation center line as a fulcrum, and the above-mentioned main body portion. In the rear monitoring function unit mounted on the main body and the rear monitoring device provided with
The main body is equipped with a posture switching member that reciprocates between the first moving end and the second moving end in a plane perpendicular to the rotation center line, and an operating member that reciprocates the posture switching member. Has been
One of the tilting member and the posture switching member is provided with a cam portion, and the other is provided with a sliding portion that slides the cam portion, and the cam portion is switched so as to extend obliquely with respect to the moving direction of the posture switching member. It has a sloping part and
When the sliding portion slides on the switching inclined portion, a rotational force around the rotation center line acts on the main body portion, and the posture switching member is located at the first moving end. It is characterized in that the rotational posture of the main body portion with respect to the tilting member can be changed depending on whether the vehicle is located at the second moving end.

In the rear monitoring device of the present invention, the cam portion is a cam slot or a cam slot that reciprocates along a plane perpendicular to the rotation center line.
It can be configured that the switching inclined portion is provided in the cam slot or the cam slot .

The rear monitoring device of the present invention is provided with a pair of rail portions in the main body portion, and the posture switching member is supported so as to be able to linearly reciprocate along the rail portions between the pair of rail portions. It is preferable that it is.

The rear monitoring device of the present invention has a second holding portion continuous with the first moving end side of the switching inclined portion and a first holding portion continuous with the second moving end side in the cam slot or the cam slot. The first holding portion and the second holding portion can be configured to be bent in a direction opposite to the tilting direction of the switching tilted portion. It is preferable that the first holding portion and the second holding portion are formed in a direction parallel to the moving direction of the cam portion.

In the rear monitoring device of the present invention, it is preferable that the main body is provided with an urging member for stabilizing the posture switching member at the first moving end and the second moving end, respectively. The urging member is, for example, a torsion spring provided between the main body and the posture switching member.

In the rear monitoring device of the present invention, the main body portion is rotatable with respect to the tilting member with the rotation center line as a fulcrum, whereas the posture switching member is supported by the main body portion so as to be reciprocally movable. The rotation direction of and the reciprocating movement direction of the posture switching member do not match. Therefore, when the main body is held by hand and the main body is tilted to change the direction of the rear monitoring function, the posture switching member does not move carelessly and the operation member is not operated. Nevertheless, it is easy to prevent a malfunction in which the relative rotational posture of the main body with respect to the tilting member changes.

A perspective view showing a rear monitoring device according to an embodiment of the present invention. A perspective view showing a state in which the rear monitoring function unit is removed from the main body unit of the rear monitoring device shown in FIG. 1. An exploded perspective view showing a state in which the operating member and the bracket are mounted in the main body case of the main body shown in FIG. 2. In the structure shown in FIG. 2, an exploded perspective view showing a state in which the support member, the main body portion, the tilting member, and the posture switching member are separated. In the rear monitoring device of the embodiment of the present invention, a partial perspective view showing a universal joint structure portion connecting a tilting member to which an operating member and a posture switching member are attached and a support member from the front. A cross-sectional view showing an operating state in which the posture switching member has moved to the first moving end in the rear monitoring device according to the embodiment of the present invention. A cross-sectional view showing an operating state in which the posture switching member has moved to the second moving end in the rear monitoring device according to the embodiment of the present invention. Partially enlarged view of the cross section shown in FIG. 7,

The rear monitoring device 1 shown in FIG. 1 is for an in-vehicle use, and is attached to a ceiling or the like in the vehicle interior above the front windshield. The rear monitoring device 1 is in front of the vehicle in the Z1 direction. The Z2 direction is the rear side opposite to the traveling direction of the vehicle, and is the direction toward the passenger compartment of the vehicle and the window behind the vehicle. The Y1 direction is upward, the Y2 direction is downward, the X1 direction is left, and the X2 direction is right.

As shown in FIG. 1, the rear monitoring device 1 has an arm-shaped support member 2. A fixing portion 2a that is directly fixed to the ceiling portion or the like in the vehicle interior or is fixed via another fixing member is formed at the upper end portion of the support member 2. As shown in FIG. 2, a tilting member 10 is tiltably connected to the lower end of the support member 2 via a universal joint structure portion 5. The main body 20 is rotatably supported by the tilting member 10.

In FIG. 4, the tilting member 10 is shown from the rear, and in FIG. 5, the tilting member 10 is shown from the front. The tilting member 10 has a tilting base 11 and a bearing forming member 12 stacked behind the tilting base 11. The tilting base 11 is made of a metal plate, and the bearing forming member 12 is made of a synthetic metal material. As shown in FIG. 4, a positioning pin 11a is fixed to the tilting base 11, the positioning pin 11a is fitted to the bearing forming member 12, and the tilting base 11 and the bearing forming member 12 are positioned. The bearing forming member 12 and the tilting base 11 are fixed to each other by a plurality of connecting screws 13.

As shown in FIG. 5, the bearing forming member 12 is provided with a bearing portion 14 facing forward (Z1 direction). The bearing portion 14 has a plurality of elastic holding pieces 14a, and the inner surface of the plurality of elastic holding pieces 14a is formed along a concave spherical surface. The tilting base 11 is formed with a hole portion 11b penetrating back and forth, and the elastic holding piece 14a passes through the hole portion 11b and extends forward (in the Z1 direction).

The support member 2 is made of metal, and as shown in FIG. 4, the lower end portion thereof is bent toward the rear, and the sphere 2b is integrally formed at the end portion facing the rear. As shown in FIG. 5, the sphere 2b is inserted into the bearing portion 14, and the plurality of elastic holding pieces 14a are fastened by the tightening ring 15, whereby the universal joint structure portion 5 is configured. The universal joint structure portion 5 is a three-dimensional joint and is a ball joint. Due to the universal joint structure portion 5, the tilting member 10 rotates about the tilting axis extending in the X1-X2 direction and the tilting axis extending in the Y1-Y2 direction with respect to the support member 2. , Z1-Z2 can rotate around a tilting axis extending in the direction. That is, the tilting member 10 can tilt in each direction about three orthogonal axes. Further, the tightening force of the tightening ring 15 allows the tilting member 10 to tilt with an appropriate load.

As shown in FIG. 1, the main body 20 has a main body case 21 made of a synthetic resin material or a light metal material. As shown in FIGS. 2, 3 and 4, the main body case 21 has a depth in the front-rear direction (Z1-Z2 direction), extends long in the left-right direction (X1-X2 direction), and extends backward (Z2 direction). It is a structure released toward. As shown in FIG. 1, in the main body 20, the rear monitoring function unit 22 is housed in the rear portion of the internal space of the main body case 21. The rear monitoring function unit 22 has a display cell with the display screen directed to the rear (Z2 direction) and a half mirror superimposed behind the display cell. The display cell is a color liquid crystal display cell having a backlight device, an electroluminescence display cell, or the like.

When the display cell is turned on in the rear monitoring function unit 22, an image of the rear of the vehicle taken by a camera provided on the vehicle body is projected on the screen, and the image is visible through the half mirror. When the display cell is turned off, the half mirror functions as a reflecting mirror, and the window behind the vehicle and the rear view of the vehicle passing through the window can be visually recognized as a reflecting image. The rear monitoring function unit 22 may be composed only of a reflector without having a display cell.

As shown in FIGS. 3 and 4, inside the front side of the main body case 21 of the main body portion 20, a storage recess 21a is formed in the central portion in the left-right direction (X1-X2 direction). As shown in FIG. 2, the tilting member 10 is housed in the storage recess 21a. A hole 21b that penetrates in the front-rear direction is formed in the inner wall surface 21c of the storage recess 21a, and the sphere 2b at the lower end of the support member 2 passes through the inside of the hole 21b and is a bearing of the tilting member 10. It is connected to the unit 14.

As shown in FIGS. 4 and 5, a rotation support shaft 16 extending in the left-right direction (X1-X2 direction) is fixed to the tilt base 11 of the tilt member 10. As shown in FIGS. 4 and 6, the storage recess 21a of the main body case 21 is formed with a shaft support recess 23 extending in the left direction (X1 direction) and the right direction (X2 direction), and the rotation support shaft 23 is formed. 16 is rotatably snapped in to the shaft support recess 23. As shown in FIGS. 4, 5 and 6, the virtual line extending in the left-right direction (X1-X2 direction) through the center of the rotation support shaft 16 is the rotation center line Ox, and the main body case 21 is rotated. It is rotatably supported by the tilting member 10 with the moving center line Ox as a fulcrum.

As shown in FIGS. 3 and 4, inside the main body case 21, a pair of brackets 24 are fixed behind the storage recess 21a (in the Z2 direction). The bracket 24 is made of a synthetic resin material or a light metal material. The bracket 24 is integrally formed with a fixed piece 25 and a spring hooking portion 26 projecting rearward, and a rail portion 27 is integrally formed in front of the fixed piece 25. Inside the main body case 21, a support wall portion 21d is formed behind the storage recess 21a, the fixing piece 25 is installed on the support wall portion 21d, and the fixing piece 25 is attached to the support wall portion 21d by the fixing screw 28. It is fixed to.

When the pair of brackets 24 are fixed at intervals in the left-right direction (X1-X2 direction), the spring hooking portions 26 formed on the respective brackets 24 are located apart from each other in the left-right direction. Further, the rail portion 27 integrally formed with each bracket 24 is arranged in the main body case 21 so as to face each other in the left-right direction (X1-X2 direction). As shown in FIG. 6, the rail portion 27 extends in parallel with the inner wall surface 21c of the storage recess 21a in the main body case 21.

As shown in FIG. 2, inside the main body case 21, the posture switching member 30 is arranged behind the tilting member 10 (in the Z2 direction). As shown in FIG. 4, the posture switching member 30 has a pair of rail sliding portions 31 parallel to the YZ plane, which is a plane orthogonal to the rotation center line Ox, in the left-right direction (X1-X2 direction). It is provided at intervals. The posture switching member 30 is provided with an urging connecting portion 32 for connecting a pair of rail sliding portions 31 located apart from each other to the left and right, and the urging connecting portion is provided at the end on the X1 side and the end on the X2 side. A sliding holding portion 33 facing the end portion of the 32 on the Z1 side is formed.

As shown in FIGS. 2 and 6, the rail portion 27 of each bracket 24 is sandwiched between the left and right ends of the urging connecting portion 32 and the sliding sandwiching portion 33 from the front-rear direction (Z1-Z2 direction). The posture switching member 30 is supported so as to be reciprocally movable along the rail portion 27. As shown in FIGS. 6 and 7, the posture switching member 30 can reciprocate in a straight line trajectory in a direction parallel to the inner wall surface 21c of the storage recess 21a. As shown in FIG. 4, inside the main body case 21, the pair of rail portions 27 face each other in the left-right direction, and the posture switching member 30 is sandwiched between the pair of rail portions 27 from the left-right direction and moves. The dimensions of the structure supporting the 30 in the front-rear direction can be reduced, and the posture switching member 30 can be stably reciprocated. The rail portion 27 may be slightly curved along the vertical direction, and the posture switching member 30 may move along the rail portion 27 along the curved locus.

As shown in FIGS. 3, 4, and 6, the operation member 40 is attached to the inside of the main body case 21 of the main body portion 20. The operating member 40 is made of a synthetic resin material. The operation member 40 is integrally formed with an operation fulcrum shaft 41 extending in the left-right direction (X1-X2 direction) from the upper end portion. As shown in FIG. 3, the fulcrum bearing 29 is formed in the storage recess 21a of the main body case 21 at intervals in the left-right direction (X1-X2 direction), and the operation fulcrum shaft 41 snaps into the fulcrum bearing 29. It is fitted and rotatably supported. As shown in FIGS. 2, 3 and 4, an operation lever 42 is integrally formed in the operation member 40, and the operation lever 42 is formed from an opening 21e formed in the lower part of the main body case 21 to the main body case. It protrudes to the outside of 21.

As shown in FIG. 5, a rotation drive protrusion (rotation drive pin) 36 extending in the opposite direction of the two rail sliding portions 31 is fixed at a position below the rail sliding portion 31 of the posture switching member 30. Has been done. As shown in FIGS. 3, 4 and 5, a drive recess 43 is formed in the operation member 40, and a rotary drive protrusion 36 is held inside the drive recess 43. When the operation lever 42 is tilted backward (Z2 direction), as shown in FIG. 6, the operation member 40 is rotated clockwise, and the rotation drive protrusion 36 is lifted upward by the drive recess 43 to take a posture. The switching member 30 moves to the first moving end. When the operation lever 42 is tilted forward (Z1 direction), as shown in FIG. 7, the operation member 40 is rotated counterclockwise, and the rotation drive protrusion 36 is pulled downward by the drive recess 43 to take a posture. The switching member 30 moves downward and moves to the second moving end.

As shown in FIGS. 2 and 4, the urging connecting portion 32 of the posture switching member 30 is provided with a pair of spring hooking portions 38 projecting rearward at positions separated in the left-right direction. A torsion spring 39 is hung as an urging member between the spring hooking portion 38 and the spring hooking portion 26 of the bracket 24 fixed to the main body case 21. In FIG. 6, the posture switching member 30 moves upward and is located at the first moving end. At this time, the posture switching member 30 is given an upward urging force by the torsion spring 39, and the posture switching member 30 is subjected to an upward urging force. 30 is stable at the first moving end. When the posture switching member 30 moves downward, the direction of the urging force by the torsion spring 39 is reversed on the way. In FIG. 7, the posture switching member 30 moves downward and is located at the second moving end. At this time, the posture switching member 30 is given a downward urging force by the torsion spring 39, and the posture switching member 30 is positioned. 30 is stable at the second moving end.

As shown in FIGS. 4, 6 and 7, a cam portion 34 is formed on each of the pair of rail sliding portions 31 provided on the posture switching member 30. The cam portion 34 is a long cam hole that penetrates the rail sliding portion 31 in the left-right direction (X1-X2 direction). The cam portion 34 is guided by the rail portion 27 and moves along the YY plane which is a plane intersecting (orthogonal) with the rotation center line Ox.

As shown in FIG. 4, the tilting base 11 of the tilting member 10 is provided with a front protruding portion 11c bent rearward (Z2 direction) from the lower portion thereof, and the front protruding portion 11c is provided with a left direction (leftward). X1) and a sliding protrusion (sliding pin) 17 that is a sliding portion protruding to the right (X2 direction) are fixed. As shown in FIGS. 6 and 7, the sliding protrusion 17 is slidably inserted into the cam portion 34 formed on the tilting base 11. The cam portion 34 may be any as long as it can guide the sliding protrusion 17, and may be, for example, a long cam groove formed in the rail sliding portion 31.

As shown in FIGS. 6 and 7, the cam portion 34 has a switching inclined portion 34a that is inclined with respect to the moving direction of the cam portion 34. The switching inclined portion 34a extends linearly. However, the switching inclined portion 34a may be slightly curved and inclined with respect to the moving direction of the cam portion 34. The main body case 21 is rotatably supported by the tilting member 10 via the rotation support shaft 16, and as shown in FIGS. 6 and 7, the switching inclined portion 34a of the cam portion 34 is a sliding protrusion. As the main body case 21 moves in the vertical direction with respect to 17, the main body case 21 rotates with the tilting member 10 as a reference and the rotation center line Ox as a fulcrum.

As shown in FIGS. 6 and 7, a first holding portion 34b that bends in the direction opposite to the tilting direction of the switching tilted portion 34a continues to the end portion (lower end portion) of the cam portion 34 on the second moving end side. Is formed. A second holding portion 34c that bends in the direction opposite to the tilting direction of the switching tilted portion 34a is continuously formed at the end portion (upper end portion) of the cam portion 34 on the first moving end side. In the cam portion 34 of the embodiment, the first holding portion 34b and the second holding portion 34c extend in parallel with the moving direction of the cam portion 34, that is, the guiding direction by the rail portion 27. As shown in FIG. 6, when the posture switching member 30 moves to the first moving end, the sliding protrusion 17 enters the first holding portion 34b of the cam portion 34, and as shown in FIG. 7, the posture switching member 30 moves. When it moves to the second moving end, the sliding protrusion 17 enters the second holding portion 34c of the cam portion 34.

Next, the operation when the operation lever 42 is operated in the rear monitoring device 1 will be described.
In the rear monitoring device 1, the tilting member 10 is tiltably supported with respect to the support member 2 in a three-dimensional direction via the universal joint structure portion 5. Further, the main body portion 20 on which the rear monitoring function portion 22 is mounted is rotatably supported with respect to the tilting member 10 in the front-rear direction with the rotation center line Ox as a fulcrum. Then, the posture switching member 30 and the operating member 40 are supported by the main body case 21 of the main body portion 20, and the tilting member 10 and the main body case 21 are connected via the posture switching member 30.

When the operation lever 42 of the operation member 40 is tilted backward (Z2 direction), the operation member 40 rotates clockwise in the main body case 21 with the operation fulcrum shaft 41 as a fulcrum, as shown in FIG. The rotation drive protrusion 36 of the posture switching member 30 is lifted by the drive recess 43 provided in the operation member 40, and the posture switching member 30 is guided by the rail portion 27 in the main body case 21 and moved upward. Further, the posture switching member 30 is urged upward at the first moving end shown in FIG. 6 by the urging force of the torsion spring 39 which is the urging member shown in FIGS. 2 and 4, and is in a stable state.

As shown in FIG. 6, when the posture switching member 30 has moved to the first moving end and is in a stable state, the sliding protrusion 17 provided on the tilting member 10 has a cam portion formed on the posture switching member 30. It is held by the first holding portion 34b of 34. The relative angle between the tilting member 10 and the main body 20 at this time is such that the inner wall surface 21c of the storage recess 21a of the main body case 21 is oriented parallel to the first posture line S1 shown in FIG.

When the operation lever 42 of the operation member 40 is tilted forward (Z1 direction) from the state of FIG. 6, the operation member 40 rotates counterclockwise in the main body case 21 with the operation fulcrum shaft 41 as a fulcrum, and the operation member 40 The posture switching member 30 is pushed downward by the drive recess 43 provided in the main body case 21, and the posture switching member 30 is guided by the rail portion 27 in the main body case 21 and moved downward. When the posture switching member 30 starts to move downward, the first holding portion 34b of the cam portion 34 formed on the posture switching member 30 is disengaged from the sliding protrusion 17 provided on the tilting member 10, and the sliding protrusion The portion 17 shifts to the switching inclined portion 34a. Further, in the process of moving the posture switching member 30 downward, the sliding protrusion 17 is guided in the switching inclined portion 34a, and the main body portion 20 draws the rotation center line Ox which is the axis of the rotation support shaft 16. As a fulcrum, it is rotated clockwise relative to the tilting member 10.

While the posture switching member 30 is moving downward, the direction of action of the urging force of the torsion spring 39 is reversed, the posture switching member 30 is moved downward by the urging force of the torsion spring 39, and the posture switching member 30 is moved downward. At the second moving end shown in FIG. 7, it is urged downward and becomes a stable state. When the posture switching member 30 reaches the second moving end and stabilizes, the sliding protrusion 17 provided on the tilting member 10 is held by the second holding portion 34c of the cam portion 34. The relative angle between the tilting member 10 and the main body 20 at this time is a state in which the inner wall surface 21c of the storage recess 21a of the main body case 21 is oriented parallel to the second posture line S2 shown in FIG. The second posture line S2 rotates clockwise from the first posture line S1 by an angle θ.

In FIGS. 6 and 7, since the rotational posture of the main body 6 changes by an angle θ, the rearward (Z2 direction) tilt posture of the rear monitoring function unit 22 mounted on the main body 6 changes. Although not shown, a detection switch for detecting a change in the posture of the operating member 40 is provided inside the main body case 21. The detection switch operates either when the operating lever 42 is tilted backward as shown in FIG. 6 or when it is tilted forward as shown in FIG. 7. A switching circuit (not shown) provided in the main body case 21 operates based on the switching signal of the detection switch, and the main body 20 is rearward in either the posture shown in FIG. 6 or the posture shown in FIG. The display cell of the monitoring function unit 22 is turned on, and the display cell is turned off when the posture is in the other position.

When the display cell lights up when the main body 20 is in either the posture shown in FIG. 6 or the posture shown in FIG. 7, an image of the rear view of the vehicle captured by the camera is displayed on the rear monitoring function unit 22. .. When the display cell is turned off in the other posture, the half mirror becomes a reflecting mirror and the rear-viewing function unit 22 functions as a rear-view mirror.

When the rear-view mirror is functioning as a rear-view mirror, the driver rotates the main body 20 with the universal joint structure 5 as a fulcrum, and adjusts the posture of the main body 20 so that the reflected image from the rear can be easily seen. It is usually set. When the operation lever 42 is operated while the main body 20 is in a posture that makes it easy to see the reflected image behind, the mode is switched to the mode in which the image is displayed in the display cell, and the main body is switched by the switching operation of the posture switching member 30. The posture of the portion 20 is changed by the angle θ. Due to this change in posture at an angle θ, it is possible to prevent the image displayed in the display cell from being visually recognized by overlapping the rear reflection image projected by the half mirror.

As described above, in the operation of changing the direction of the main body 20 with the universal joint structure 5 as a fulcrum, an operator such as a driver holds the main body 20 by hand and moves the main body 20 to one of the three-dimensional directions. It is done by rotating. As shown in FIG. 5, in the universal joint structure portion 5, the elastic holding piece 14a of the bearing portion 14 provided on the tilting member 10 is fastened to the sphere 2b by the tightening ring 15, and the bearing portion 14 and the sphere 2b are joined to each other. The rotational load is very large. Therefore, it is necessary to apply a large force to the main body 20 by hand in order to change the posture of the main body 20.

In the conventional device described in Patent Document 1 and the like, the tilting member and the main body portion are connected only by the operating member, and the operation member is rotated when the main body portion is rotated with respect to the tilting member. The direction and the rotation direction of the main body with respect to the tilting member at this time are the same direction. Therefore, when the main body is held by hand and the posture of the main body is changed by a strong force without operating the operation member, the rotational force of the main body acts on the operation member, and the operation member follows the main body. There is a problem that a malfunction that causes inadvertent rotation occurs. On the other hand, in the rear monitoring device 1 of the embodiment of the present invention, since the tilting member 10 and the main body portion 20 are connected not only by the operating member 40 but also by the posture switching member 30, as described above. Malfunctions are less likely to occur.

That is, as shown in FIGS. 6 and 7, the rear monitoring device 1 has a direction in which the main body 20 rotates with respect to the tilting member 10 with the rotation center line Ox as a fulcrum, and a posture switching member in the main body case 21. The direction in which 30 moves back and forth is different. Therefore, when the main body portion 20 is held by hand and the posture is changed with a strong force, the posture switching member 30 may move without permission even if the force of rotating the main body portion 20 acts on the posture switching member 30. Therefore, it is easy to prevent the phenomenon that the operating member 40 operates even though it is not operated.

Further, a torsion spring 39 is provided between the posture switching member 30 and the main body case 21, and the posture switching member 30 is moved by the urging force of the torsion spring 39 to the first moving end shown in FIG. 6 and the second moving end shown in FIG. 7. It is stabilized at the moving end. Therefore, even if the strong rotational force applied to the main body 20 acts on the posture switching member 30, the posture switching member 30 does not move freely from the first moving end or the second moving end, and the operating lever 42 is not operated. As long as the movement of changing the relative angle between the tilting member 10 and the main body 20 does not occur.

FIG. 8 shows a partially enlarged cross-sectional view of FIG. 7.
As shown in FIG. 8, the rail sliding portion 31 and the cam portion 34 of the posture switching member 30 move in the YY plane, and the moving direction (reciprocating moving direction) M thereof is the extending direction of the rail portion 27. be. FIG. 8 shows an arc φ centered on the rotation center line Ox of the main body 20, passing through the center of the sliding protrusion 17, and located on the YZ plane. The direction of the tangent line of the arc φ at the center of the sliding protrusion 17 and the moving direction M intersect each other. When the main body 20 is held by hand and an attempt is made to rotate the main body 20 in the front-rear direction, the force acts on the sliding protrusion 17 from the cam portion 34 of the posture switching member 30, but the sliding protrusion 17 The direction of the force acting on the arc φ is the tangential direction of the arc φ. Since the direction of this force intersects the reciprocating movement direction M, it is unlikely that the posture switching member 30 will move due to the rotational force applied to the main body 20 by hand.

Further, in the cam portion 34, the first holding portion 34b and the second holding portion 34c that are continuous at both ends of the switching inclined portion 34a are formed by bending in the direction opposite to the inclined direction of the switching inclined portion 34a. Therefore, in the state of FIG. 6, the sliding protrusion 17 is difficult to come out of the first holding portion 34b, and in the state of FIG. 7, the sliding protrusion 17 is hard to come out of the second holding portion 34c. As shown in FIG. 8, the center line H1 of the first holding portion 34b and the center line H2 of the second holding portion 34c are in the same direction as the direction M in which the posture switching member 30 and the cam portion 34 reciprocate. Further, the urging direction of the torsion spring 39 is also the M direction. Therefore, even due to the action of the urging force of the torsion spring 39, the sliding protrusion 17 is difficult to come out of the first holding portion 34b in the state of FIG. 6, and the sliding protrusion 17 is the second holding portion 34c in the state of FIG. It is hard to get out of the inside. Therefore, when the main body portion 20 is held and rotated by hand, the posture switching member 30 is difficult to move, and the operation member 40 is less likely to rotate even though the operation member 40 is not operated. ..

Further, the center line H1 of the first holding portion 34b of the cam portion 34 and the center line H2 of the second holding portion 34c are parallel to the moving direction M of the posture switching member 30. Therefore, when the operation member 40 is operated from the state of FIG. 6 to move the posture switching member 30 downward, the first holding portion 34b of the cam portion 34 tends to come out of the sliding protrusion portion 17. Similarly, when the posture switching member 30 moves upward from the state shown in FIG. 7, the second holding portion 34c easily comes out of the sliding protrusion portion 17. As a result, the load when operating the operation lever 42 can be reduced.

In the rear monitoring device 1 of the embodiment, the posture switching member 30 is provided with a cam portion 34, and the tilting member 10 is formed with a sliding protrusion 17 which is a sliding portion for sliding the cam portion 34. However, on the contrary, the tilting member 10 may be provided with a cam portion, and the posture switching member 30 may be provided with a sliding protrusion.

1 Rear monitoring device 2 Support member 2b Sphere 5 Universal joint structure 10 Tilt member 11 Tilt base 12 Bearing forming member 14 Bearing part 16 Rotating support shaft 17 Sliding protrusion (sliding part)
20 Main body 21 Main body case 22 Rear monitoring function part 27 Rail part 30 Posture switching member 34 Cam part 34a Switching inclined part 34b First holding part 34c Second holding part 39 Torsion spring (urging member)
40 Operation member 41 Operation fulcrum shaft 42 Operation lever 43 Drive recess Ox Rotation center line S1 First posture line S2 Second posture line

Claims (7)

A support member attached to the vehicle, a tilting member rotatably connected to the support member, a main body portion rotatably supported by the tilting member with a rotation center line as a fulcrum, and a main body portion mounted on the main body portion. In the rear monitoring function unit provided with, and the rear monitoring device provided with
The main body is equipped with a posture switching member that reciprocates between the first moving end and the second moving end in a plane perpendicular to the rotation center line, and an operating member that reciprocates the posture switching member. Has been
One of the tilting member and the posture switching member is provided with a cam portion, and the other is provided with a sliding portion that slides the cam portion, and the cam portion is switched so as to extend obliquely with respect to the moving direction of the posture switching member. It has a sloping part and
When the sliding portion slides on the switching inclined portion, a rotational force around the rotation center line acts on the main body portion, and the posture switching member is located at the first moving end. A rear monitoring device characterized in that the rotational posture of the main body portion with respect to the tilting member can be changed depending on whether the device is located at the second moving end. The cam portion is a cam slot or a cam slot that reciprocates along a plane perpendicular to the rotation center line.
The rear monitoring device according to claim 1 , wherein the switching inclined portion is provided in the cam slot or the cam slot . The second aspect of claim 2, wherein the main body portion is provided with a pair of rail portions , and the posture switching member is supported so as to be linearly reciprocated along the rail portions between the pair of rail portions. Rear monitoring device. The cam slot or the cam groove is provided with a second holding portion continuous with the first moving end side of the switching inclined portion and a first holding portion continuous with the second moving end side, and the first holding portion is provided. The rear monitoring device according to claim 2 or 3, wherein the holding portion and the second holding portion are bent in a direction opposite to the tilting direction of the switching tilted portion. The rear monitoring device according to claim 4, wherein the first holding portion and the second holding portion are formed in a direction parallel to the moving direction of the cam portion. The rear monitoring device according to any one of claims 1 to 5, wherein the main body is provided with an urging member for stabilizing the posture switching member at the first moving end and the second moving end, respectively. The rear monitoring device according to claim 6, wherein the urging member is a torsion spring provided between the main body and the posture switching member.

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