JP2526856Y2 - Rotating part structure of door mirror - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a structure of a rotating part of a vehicle door mirror.

[Prior art] Since a door mirror of an automobile is mounted so as to protrude from a vehicle body to the side as compared with a fender mirror, when approaching or colliding with an obstacle while approaching a narrow place or the like,
Not only the mirror itself, but also to minimize damage to the opponent, or to reduce the vehicle width in narrow parking lots or when loading and transporting, for example, Japanese Utility Model No. 61-203854, Japanese Utility Model Application No. 62-139738 As disclosed by the patent publication, so-called retractable door mirrors are used, in which the door mirror can be kept lying down front or rear.

Such a door mirror has a shaft mounted on a projecting portion of a base, a socket portion of a frame is inserted into the shaft, and a mirror housing is fixed to the frame, and a flat surface around a root portion of the shaft and a lower surface of the socket portion. A recess is provided in the base and a plurality of steel balls are interposed to form a gap between the upper surface of the root portion and the lower surface of the socket portion, while a coil spring is disposed around the socket portion and a spring is provided at the upper end of the shaft. Secure the washer and U plate. Since the frame is mounted by the elasticity of the coil spring, each ball member fits into a concave portion formed at the base of the shaft and the lower surface of the frame, and as a result, the mirror housing is held in a positioned state.

[Problems to be Solved by the Invention] The conventional door mirror as described above, when the mirror body is turned from the normal use position in the falling direction, such as when entering the vehicle in a narrow place or when avoiding an impact, Since the ball member rolls over one of the recesses on the lower surface of the frame or the upper surface of the shaft base, the mirror housing fixed to the frame rises, and returns to the original normal use position to lower the mirror housing. Therefore, the sound of passing over the ball member due to the vertical movement is caused.

Another drawback is that dust easily adheres to a gap between the flat surface of the base of the base shaft and the lower surface of the socket of the frame. If dust adheres to gaps or balls, the relative rotation of the base and the frame will cause the edges of the recesses to be worn by the dust, so the mirror surface will vibrate when the car is running,
Rear visibility may be reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tiltable mirror that does not cause vertical movement of a frame or vibration of a mirror surface when a mirror housing rotates.

Further, the present invention aims to improve the following problems which have been conventionally demanded. That is, the conventional one requires a large set space in the thrust direction of the fixed shaft to dispose the coil spring around the socket portion of the frame.

In addition, a motorized folding mirror requires a clutch gear, which also requires a space to move up and down.
Since a large mounting space is required in the thrust direction of the fixed shaft as described above, there has been a demand for simplifying the structure and reducing the mounting space in order to reduce the size of the housing.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a mirror housing mounting frame which does not move up and down with respect to the upper surface of a base when the mirror housing stands up and down and turns, thereby maintaining surface contact. And a cylindrical member having a ball-notch-type positioning means biased by a spring is provided around a fixed shaft for supporting frame rotation provided on the base overhang.

That is, in the present invention, the bearing portion 25 of the supporting frame 24 is rotatably supported on the fixed portion 23 erected on the base portion 21, and the mirror housing fixed to the frame 24 is rotated and held at the normal use position and the lying position. A door mirror, wherein a rotation support surface 22 formed on an upper surface of the base portion 21 and a rotation slide surface 26 formed on a lower surface of the frame are arranged so as to make surface contact with each other, and a bearing portion of the frame is provided. twenty five
Around the cylindrical member 27, and attached to the upper surface of the cylindrical member 27 is a fixed plate 33 that is prevented from rotating around the fixed axis, and at least one of the cylindrical member 27 or the fixed plate 33 is relatively axially attached. Movably held, and on the same circumference of the boss 27b of the cylindrical member 27,
By providing several spring holes 29 penetrating in the axial direction,
The compression springs 30 each having ball members 31 and 32 arranged vertically movably in the holes against the elasticity of the springs at the upper and lower spring ends are respectively accommodated, and the mirror housing is fixed by the compression springs 30. Frame 24 formed on the upper surface of the base 21
The recesses 36 and 37 in which the balls 31 and 32 are fitted are provided on the surface of the fixing plate 33 and the frame 24 facing the cylindrical member 27, respectively, while being pressed against the cylinder 22.

Also, in the present invention, the bearing 25 of the supporting frame 24 is rotatably supported on the fixed shaft 23 erected on the base 21,
This is a door mirror capable of rotating and holding a mirror housing fixed to the frame 24 in a normal use position and a lying position, and is formed on a rotation support surface 22 formed on an upper surface of the base portion 21 and a lower surface of the frame. The rotating sliding surface 26 is arranged so as to make surface contact with the rotating sliding surface 26, and the bearing 25
A clutch gear 27 is mounted around the clutch gear 27, a fixed plate 33 that is prevented from rotating around the fixed shaft is mounted on the upper surface of the clutch gear 27, and a drive unit including an electric motor and a speed reducer is provided on the frame. And at least one of the clutch gear 27 and the fixed plate 33 is relatively movably held in the axial direction, and the boss portion 27b of the clutch gear 27 is the same as the door gear. On the circumference, several spring holes 29 penetrating in the axial direction are provided, and ball members 31, 32 are arranged at the upper and lower spring ends so as to be vertically movable in the holes against the elasticity of the spring. The frame 24 is formed on the upper surface of the base portion 21 by the compression spring 30. The recesses 36 and 37 in which the balls 31 and 32 are fitted are provided on the surface of the fixed plate and the frame facing the clutch gear 27, respectively, while being pressed against the gear 22.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged sectional view of an essential part of a fixed shaft portion in the present invention, FIG. 2 is an exploded view of the same, and FIG. 3 is a perspective view of a cylindrical member inserted into the fixed shaft. In FIG. 1, reference numeral 21 denotes a base portion fixed to the vehicle body, 22 denotes a supporting surface of a supporting frame formed on the upper surface of the base portion, 23 denotes a fixed shaft erected on the supporting surface, and 24 denotes a mirror housing fixed. The supporting frame 25 is a bearing formed at the end of the supporting frame.

As shown in FIG. 1, a bearing 25 is inserted into the fixed shaft 23, and a rotating support surface 22 of a supporting frame formed on the upper surface of the base 21 and a rotating sliding surface 26 formed on the lower surface of the frame 24. Are brought into direct surface contact so that there is no gap.

Further, a cylindrical member 27 is inserted outside the bearing 25 inserted into the fixed shaft 23. A gear 27a is formed on the peripheral surface of the cylindrical member of the illustrated embodiment, and is rotatably inserted into the bearing 25. The gear 27a has a speed reducer provided on the supporting frame fixed to the mirror housing.
It meshes with a terminal gear 28 in a gear train of an electric drive means such as a DC motor. The boss portion 27b of the cylindrical member 27 has a spring hole vertically penetrated as shown in FIGS.
A plurality of 29s are provided at evenly spaced positions on one circumference around the fixed shaft 23. These spring holes 29 accommodate compression coil springs 30 as shown in FIGS. In addition, a plurality of ball members 31 and 32 constituting a part of the positioning means are disposed at spring ends located at both ends of the spring 30 as described later, and a part of the spherical surface of the ball is formed by the spring 30, The boss 27b is urged to protrude upward or downward from the end face.

A fixed plate 33 is mounted on the fixed shaft 23 so as to be non-rotatable with respect to the fixed shaft and to be vertically movable. This fixed plate is configured to be urged downward by a disc spring 35 fixed to the upper end of the fixed shaft 23 via a fixing member 34,
A plurality of positioning recesses 36 into which the balls 31 can be fitted are formed on the lower surface of the fixing plate 33. The ball 31 is also provided on the end surface of the supporting frame 24 facing the cylindrical member 27.
Are formed to form a plurality of positioning recesses 37 into which are fitted. Then, by assembling the cylindrical member 27 and the supporting frame 24 so as to be pressed against the mounting base 21 by the fixing plate 33, a plurality of balls disposed between the fixing plate 36, the cylindrical member 27, and the opposing surfaces thereof. Element
32 constitutes a first positioning means, and further comprises a cylindrical member.
The second positioning means is constituted by 27, the supporting frame 24, and the plurality of balls 31 arranged between these opposing surfaces.

In addition, the lower second positioning means makes the biting of the ball member into the recess 37 shallower than the upper first positioning means, or the upper first positioning means when the biting is the same.
The engagement between the ball and the concave portion is reduced by a method such as making the ball ball diameter larger than the positioning means.

Next, the operation and effect of the present invention configured as described above will be described.

FIG. 1 shows a state where the mirror housing is stationary in a normal use position, that is, a neutral position. In this state, the upper and lower opposing balls and the concave portions are in good mesh with each other due to the elasticity of the compression coil spring 30. When turning the mirror housing to the lying position from this state, for example, by operating a switch in the vehicle compartment to drive the electric driving means, the rotational force is transmitted to the cylindrical member 27 via the gear 28 at the end. Since the cylindrical member 27 is firmly engaged with and fixed to the fixed plate 33 via the first positioning means, the terminal gear 28 revolves around the fixed shaft 23 while rotating by meshing with the gear 27a on the peripheral surface of the cylindrical member. Will be done. At this time, since the ball member 31 receives an external force larger than the torque of the concave portion 37 in the tangential direction, the second positioning means between the cylindrical member 26 and the supporting frame 24, which are weakly engaged with each other, is disengaged, and the supporting frame 24 is disengaged. Rotates around the fixed shaft 23 while maintaining surface contact with the support surface 22. If the rotation is stopped at an arbitrary tilting position, the compression state of the coil spring 30 maintains the falling state at that position.

When returning to the normal use position from the lying position, the electric means is rotated in the opposite direction, and the supporting frame is rotated.
When the support frame 24 is moved in the opposite direction from that position, the supporting frame 24 moves the support surface 22 around the fixed shaft 23 as described above.
You can rotate it up and return to its original position. As a result, the recess 37
The ball 31 is fitted into the hole and is positioned and held.

When the mirror housing is manually forcibly lowered, the upper and lower ball members 31, 32 receive an external force greater than the torque of the concave portions 36, 37 in the tangential direction, so that the distance between the ball and the concave portion is increased. One or both of them are disengaged from each other, so that the supporting frame can be moved to an arbitrary lying position around the fixed shaft 23. On the other hand, when the mirror housing receives an unexpected impact due to a collision with an obstacle or the like, the upper and lower ball members 31 and 32 instantaneously receive an external force larger than the detachment torque of the concave portions 36 and 37 in the tangential direction of the ball. One or both of the engagement between the ball and the recess is released, and the mirror housing is forcibly rotated.

In the above embodiment, the fixed plate 33 is mounted so as to be movable in the thrust direction of the fixed shaft. However, as shown in FIG. 4, a wave washer or an O-ring 40 is provided between the cylindrical member 27 and the supporting frame 24. When the cylindrical member 27 provided between the fixing plate 33 and the supporting frame 24 is movably mounted so as to allow a slight movement in the axial thrust direction, the positioning plate itself is mounted so as not to move. It is also possible.

[Effects of the Invention] According to the configuration of the present invention, the following functions and effects are exhibited.

When the mirror housing is rotated, the supporting frame does not move up and down, so the mirror (mirror surface)
Does not occur.

In the present invention, a spring hole is formed in a cylindrical member, and a coil spring is disposed in the spring hole. Then, a ball member is disposed at the spring end. I do.

Unlike the conventional type, a large set space for disposing the coil spring around the socket portion of the frame is not required. Therefore, the assembling space can be reduced, and the size of the mirror housing can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of a fixed shaft portion in the present invention, FIG. 2 is an exploded view of the same, FIG. 3 is a perspective view of a cylindrical member inserted into the fixed shaft, and FIG. It is a principal part expanded sectional view of the fixed shaft part which shows an Example. 21: Base, 22: Rotating support surface, 23: Fixed shaft, 24: Supporting frame, 25: Bearing, 26: Rotating sliding surface, 27: Cylindrical member, 27a: Gear, 27b: Boss, 28: Spring Hole, 30: Compression spring, 31, 32: Ball member, 33: Fixing plate, 35: Belleville spring, 36, 37: Positioning recess

Claims (2)

(57) [Scope of request for utility model registration] 1. A bearing portion 25 of a supporting frame 24 is rotatably supported on a fixed shaft 23 erected on a base portion 21, and a mirror housing fixed to the frame 24 is held in a normal use position and a fall position. A door mirror, wherein a rotation support surface 22 formed on an upper surface of the base portion 21 and a rotation slide surface 26 formed on a lower surface of the frame are arranged so as to make surface contact with each other, and a bearing portion of the frame is provided. A cylindrical member 27 is mounted around 25, and a fixed plate 33 that is prevented from rotating around the fixed axis is mounted on the upper surface of the cylindrical member 27, and at least one of the cylindrical member 27 or the fixed plate 33 is relatively axially mounted. And a plurality of spring holes 29 penetrating in the axial direction on the same circumference of the boss portion 27b of the cylindrical member 27, and each of the upper and lower spring ends. Each of the compression springs 30 includes ball members 31 and 32 arranged vertically movably in the holes against the elasticity of the springs, and the compression springs 30 move the frame 24 to which the mirror housing is fixed. Support surface 22 formed on the upper surface of base portion 21
And the recesses 36 and 37 in which the balls 31 and 32 are fitted are provided on the surface of the fixed plate 33 and the frame 24 facing the cylindrical member 27, respectively. Rotating part structure of door mirror. 2. A bearing 25 of a supporting frame 24 is rotatably supported on a fixed shaft 23 erected on a base 21, and a mirror housing fixed to the frame 24 is held in a normal use position and a fall position. A door mirror, wherein a rotation support surface 22 formed on an upper surface of the base portion 21 and a rotation slide surface 26 formed on a lower surface of the frame are arranged so as to make surface contact with each other, and a bearing portion of the frame is provided. twenty five
A clutch gear 27 is mounted around the clutch gear 27, a fixed plate 33 that is prevented from rotating around the fixed shaft is mounted on the upper surface of the clutch gear 27, and a drive unit including an electric motor and a speed reducer is provided on the frame. And at least one of the clutch gear 27 and the fixed plate 33 is relatively movably held in the axial direction, and the boss portion 27b of the clutch gear 27 is the same as the door gear. On the circumference, several spring holes 29 penetrating in the axial direction are provided, and ball members 31, 32 are arranged at the upper and lower spring ends so as to be vertically movable in the holes against the elasticity of the spring. The frame 24 is formed on the upper surface of the base portion 21 by the compression spring 30. A rotating part of a door mirror, wherein concave portions 36 and 37 in which the balls 31 and 32 are fitted are provided on a surface of the fixed plate and the frame facing the clutch gear 27 while being pressed against the clutch gear 27. Construction.