JPH0425902B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a turnover type exterior back mirror in which the angle of a mirror provided in a mirror body can be remotely adjusted by manual operation of a lever extending into the interior of a vehicle. It is something.

[Prior Art] Automobile door mirrors in which the mirror body tilts when a large external force is applied and returns to its original position when the external force is removed are widely known as impact avoidance type or tilting type mirrors. However, in recent years, due to the need to narrow the parking width when entering a parking lot or transporting vehicles by ship, foldable mirrors have become popular, allowing the mirror body to be tilted almost at right angles to the rear of the vehicle from its normal use position and maintained in that position. used in Each mirror is provided with a mirror angle adjustment device that is tiltably supported within the mirror body, and can be remotely operated from inside the vehicle.

[Problems to be Solved by the Invention] There are two ways to remotely adjust the angle of the mirror: electrically and manually. Electrical remote control devices have complicated control relationships and are expensive.
Further, in the case of a manual device, it is relatively inexpensive because it uses a link mechanism, but it is quite difficult to provide a link mechanism that will not be damaged even by large movements when the mirror body is tilted. Even if this difficulty is solved, the mirror angle adjustment mechanism is also moved when the mirror body is tilted, so the mirror angle must be readjusted each time the tilted mirror body is returned to its normal position. It was hot.

The present invention provides a turnover type door mirror equipped with a manual remote control device, which does not damage the angle adjustment mechanism of the mirror when the mirror body is tilted, and when the body is returned to the normal position from the tilted position. The objective is to provide a door mirror that does not require readjusting the angle of the mirror.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a structure in which a cylindrical bearing is installed upright on a base provided on a bracket fixed to a vehicle body, and a mirror body can be tilted in the longitudinal direction on the bearing. In the vehicle exterior back mirror, in which a mirror holder is tiltably mounted to hold the mirror with respect to a central pivot provided on a support fixed in the mirror body, a rotating shaft portion is provided inside the cylindrical bearing when the mirror is tilted. and a shaft that can move up and down inside the bearing is inserted, and an operating lever having a fulcrum member is arranged inside the base so that the lever can be freely rotated in the vertical and horizontal directions. , one end of the operating lever projects into the vehicle interior, the other end is connected to the lower end of the shaft, and the upper end of the shaft is provided with a spline consisting of a spline shaft and a cylindrical boss portion into which the spline shaft is inserted. A coupling is interposed to form a rack at the extended end of the spline shaft, and a pinion fixed to a shaft disposed substantially parallel to a horizontal plane along the longitudinal direction of the mirror body is engaged with the rack. A first arm extending in a vertical plane substantially orthogonal to the horizontal plane and swingable about the axis is attached to the other end of the fixed shaft; attaches a second arm extending in a horizontal plane along the longitudinal direction of the mirror body through a clutch and capable of swinging about the shaft; The upper part of the second arm is connected to the upper part of the mirror by a vertical angle adjustment link of the mirror, and the tip of the second arm and the side part of the central pivot on the back side of the mirror holder are connected by a left and right angle adjustment link of the mirror. That is.

[Function] The central shaft inside the spline coupling ring is raised and lowered by raising and lowering the shaft using the operation lever.
The vertical swing angle of the mirror is adjusted by operating the vertical angle adjustment link of the mirror via the first arm by the action of a rack gear provided at the upper end of the shaft. On the other hand, the shaft is rotated in the left-right direction using the operating lever, and the left-right angle adjustment link of the mirror is operated via the second arm fixed to the spline coupling ring, thereby adjusting the left-right swing angle of the mirror.

For the rack provided on the spline shaft,
The pinion is slidably mounted in a direction perpendicular to the shaft axis, and the second arm is fixed to the boss of the spline coupling via a clutch, so that the mirror body can be artificially moved to the top of the vehicle. When tilting inside the outside line, a large movement of the angle adjustment link causes slippage between the shaft and pinion or between the shaft and the arm, thereby preventing damage to the mirror angle adjustment mechanism.

Furthermore, when returning the mirror body from a tilted position to its normal position, the mirror reproduces its original deflection angle without requiring any special adjustment.

[Examples] The present invention will now be specifically described with reference to illustrated embodiments. In Figures 1 to 7, numeral 1 is a bracket fixed to the vehicle body, 2 is a base protruding from the outside of the bracket 1, 3 is a cylindrical bearing erected on the base 2, and 4 is tilted with respect to the cylindrical bearing 3. A freely supported mirror body, 5 a mirror support fixed in the mirror body 4, 6 a mirror support 5
7 is the operation lever for adjusting the mirror angle, 8 is the knob, 9 is the mirror holder, 1
0 is a mirror attached to the center pivot 6 so as to be tiltable.

A coil spring 11 is arranged around the outer periphery of the cylindrical bearing 3, and the coil spring 11 is arranged in a compressed state between a spring presser 3a fixed to the upper end of the cylindrical bearing 3 and the root of the cylindrical bearing 11. The mirror body 4 is elastically supported on the base 2.

A shaft 20, which is a central component of the mirror angle adjustment mechanism, is inserted into the cylindrical bearing 3 so as to be movable up and down and rotatable. The shaft 2
A spline coupling ring 21 as shown in FIGS. 4 and 5 is interposed on the upper part of the shaft to form a rack 50 at the extended end of the shaft. The spline coupling ring 21 includes a central spline shaft 22 and a cylindrical boss portion 23 having a plurality of grooves 23a into which spline teeth 22a fit. The cylindrical boss portion 23 is attached by a holding member 24 fixed to the inner surface of the mirror body 4 so as not to be displaced in the vertical direction.

On the other hand, the lower part of the shaft 20 passes through the base 2 and is inserted into the base 2 as shown in FIG. 1, and a gear 25 is fitted to the lower end thereof. That is, as shown in FIG. 7, pin holes 20b and 25 are formed in the lower part 20a of the shaft and the boss portion 25a of the gear, respectively.
b, and a pin 26 is passed through this to fix the gear 25 to the shaft 20. Further, the lower boss 25a of the gear is formed with an annular groove 27 to which the tip end 17 of the operating lever 7 is connected.

As shown in FIG. 1, a fulcrum member 28 having the following structure, as an example, is disposed inside the base and serves as a center of rotation of the operating lever 7. This fulcrum member 28 has protrusions 28a on both sides as shown in FIG. 7, and has a hole 28b in the center through which the tip of the lever 7 passes. Reference numeral 30 indicates an arm having a rotation-preventing notch 30a that engages with the protrusion 28a, and a toothless portion 29 that engages with the gear 25 at the tip. This arm 30 is used by being attached integrally to the upper part of the fulcrum member 28, and the lever 7 fixed to the fulcrum member using the pin 18 is moved in the left and right directions in FIG. When moved, the shaft 20 is rotated in the opposite direction to the movement of the operating lever 7 via the missing teeth 29 and the gear 25.

When the lever 7 is moved in the vertical direction, the lever tip 17 is engaged with the annular groove 27 at the bottom of the gear 25, so that the shaft 20 is moved up and down. The vertical movement of the shaft 20 is transmitted to the shaft 20 in an opposite relationship to the vertical movement of the operating lever 7.

The mechanism for transmitting the movement of the operating lever 7 to the shaft 20 is meshing gears 25 and 29 in the embodiment shown in FIG. 7, but a different mechanism may be used, and FIG. 8 shows a modification thereof. .

In this case, a pivot 40 serving as a rotation center (fulcrum member) is provided at the tip of the operating lever 7, and a relatively small sphere 41 is provided at the tip of the operating lever that fits into the socket 2a in the base, and this is attached to the shaft. 2
It is inserted into a cavity 43 of a box 42 that projects horizontally from the lower end. Operation lever 7
The vertical and horizontal movements of the shaft 20 are transmitted as movements of the shaft 20 in the opposite directions, as in the case of FIG.

The spline shaft 22 constituting the spline coupling ring 21 is provided with a rack 50 at the top of the shaft, as shown in FIGS. 3 and 6. The rack 50 is formed such that its tooth tip surface is curved in a direction perpendicular to the tooth row direction (the direction in which the teeth are lined up), and a pinion 51 meshes with the tooth tip. The rack 50 moves in the vertical direction as the spline shaft 22 moves in the axial direction, and the pinion 51 rotates through the rack 50 to rotate the output shaft 51a in the vertical direction. The output shaft 51a is mounted by a shaft support 52 parallel to a horizontal plane extending in the longitudinal direction of the mirror body 4. A vertical angle adjusting arm (first arm) 53 of the mirror is fixed to the tip of this shaft, and extends in a vertical plane substantially perpendicular to the horizontal plane, and is configured to swing about the axis.

The first arm 53 is connected to the spline shaft 22
It is designed to swing around a shaft 51a by gears 50 and 51 as the shaft moves up and down. Furthermore, this first
As shown in FIG. 3, a mirror vertical angle adjustment link 54 is interposed between the tip of the arm 53 and the upper part of the center pivot 9 on the rear surface of the mirror holder.

By the way, as shown in FIGS. 1 and 5, the cylindrical boss portion 23 of the spline coupling ring 21 has a left-right angle adjusting arm (second arm) 60 of the mirror 10 extending in a horizontal plane along the longitudinal direction of the mirror body. It is fixed so as to be able to swing about the shaft 20 via a clutch 61. In other words, the second arm 60 swings in the left-right direction as the cylindrical boss portion 23 rotates, that is, as the shaft 20 rotates, and the boss portion 23 is inserted into the end of the second arm 60. For example, a ball clutch 61 is formed between this groove and the boss portion.
is interposed. In the figure, 61a is a ball, 61b
is a concave ball seat, 63 is a leaf spring that tends to engage the ball and the concave ball seat, and this leaf spring 6
3 is the boss portion 23 exposed from the groove 62.
During normal mirror angle adjustment, the boss portion 23 remains fitted into the groove 62 as shown in FIG. 5 and does not come out.

A left/right angle adjustment link 64 of the mirror 10 is interposed between the tip of the second arm 60 and the side of the center pivot 6 on the back surface of the mirror holder (FIG. 2).

[Function] Next, the function of this embodiment having such a configuration will be explained with reference to FIG. 10.

As shown in FIG. 5, a clutch 61 is interposed between the second arm 60 that adjusts the left-right deflection angle of the mirror and the spline coupling 21, so that during normal use, the shaft 20 and the second The mounting angle of the arm 60 will always be kept constant. In this state, when the operating lever 7 is operated in the direction A or B in FIG. 10 by holding the tip knob 8 protruding into the vehicle interior, the shaft 20 rotates in the opposite direction to the movement of the knob 8. Rotation of the shaft 20 is achieved by connecting the tip of the second arm 60, which is attached to the boss of the spline coupling via a clutch, to the knob 8.
mirror 1 supported by the center pivot 6 by pushing and pulling the left and right angle adjustment links.
The horizontal deflection angle of 0 can be adjusted.

Further, when the knob 8 of the operating lever 7 is operated in the C or D direction, the shaft 20 is directly moved up and down by the engagement of the lever tip 17 with the groove 27 or 43 in the opposite direction to the movement of the knob 8. . When the shaft 20 moves up and down, the rack 50 at the top of the spline shaft moves up and down, and the pinion 51 that engages with the rack 50 moves up and down.
rotates and the first arm 53 swings vertically about the shaft 51a, which pushes and pulls the vertical angle adjusting link 54 and adjusts the vertical deflection angle of the mirror 10.

By the way, when the vehicle is stored or transported, the mirror body 4 may be tilted backwards or forwards to the limit angle just before contacting the vehicle body, or the mirror body 4 may be rotated about the shaft 20 due to an unexpected impact.
When rotated, the tilted state is maintained by the spring 11, and the shaft 22 and the first
Even if an excessive torque is applied to the connecting portions of the arm and the second arm, the following avoidance means work to prevent the connecting portions from being destroyed.

First, to explain the avoidance means on the first arm side, as mentioned above, on the top of the spline shaft 22, there is a first arm 5 that adjusts the vertical deflection angle of the mirror.
3, and a rack 50 in the form of a rack gear with which the pinion engages is provided.

As shown in FIG. 6, the rack 50 is formed so that the outer surface of its tooth tip is curved in a direction perpendicular to the row direction of the teeth. In normal use of the mirror, this curved surface and the pinion 51 are meshing properly. On the other hand, if a strong external force is applied to the mirror body 4, this body may move toward the rear of the vehicle, for example.
When tilted 90 degrees, the pinion 51 remains engaged with the gear 50 and moves perpendicular to the axis with the shaft 22 as the center, using the outer surface of the arc-shaped tooth tip as a sliding surface, as shown by the chain line in FIG. This prevents an excessive load from being applied to the coupling mechanism between the shaft 22 and the first arm 53.

Next, the avoidance means on the second arm side will be explained. For example, when the mirror body is tilted backwards, the ball 61a climbs over the concave ball seat 61b and comes into contact with the surface of the boss portion 23, as shown in FIG. The end portion comes off from the groove 62 and is held down by the elasticity of the leaf spring 63 to prevent the shaft 20 from coming off any further.
This causes the inner surface of the groove 62 and the surface of the boss portion 23 to slip when the second arm 60 rotates significantly (approximately 75 degrees in FIG. 9), thereby preventing damage to the second arm and the link portion that follows it. It is prevented.

When the mirror body 4 is returned from the tilted state to the normal use position, the pinion 51 of the first arm slides on the rack centering on the shaft and returns to its previous position.
The position of the second arm 60 also returns to its previous position, and the ball 61a fits into the concave ball seat 61b.
Arm 53 and second arm 60 are maintained at their original proper mounting angles with respect to shaft 20. mirror 10
The links 54 and 64 for adjusting the angle of the mirror are in the same position as before the mirror body 4 is tilted, so there is no need to readjust the angle of the mirror.

[Effects of the Invention] As detailed above, the rearview mirror of the present invention allows remote adjustment of the angle of the mirror by manual operation of a lever extending into the vehicle interior, and also prevents external shocks from being applied to the mirror during transportation or parking of the vehicle. When applied, the mirror body can be tilted to the inside of the outermost line of the vehicle.

Particularly, in the present invention, a shaft is inserted into the cylindrical bearing and serves as a rotating shaft when the mirror is tilted, and can move up and down inside the cylindrical bearing, and a spline coupling is disposed on the upper part of the shaft. A rack whose outer circumferential surface is an arc-shaped curved surface is provided on the spline shaft, a first arm operating pinion that can swing in the vertical direction is engaged with the rack, and between the first arm and the mirror holder, A vertical angle adjustment link for the mirror is interposed, and a second arm that can swing in the left-right direction is fixed to the boss portion of the spline coupling via a clutch, and the mirror is disposed between the second arm and the mirror holder. Since the left and right angle adjustment links are interposed, the mirror body can be easily tilted to any desired angle. In addition, the remote control mechanism of the present invention has a simple structure, and can accurately adjust the tilt of the mirror by moving the operating lever left and right or up and down.
Furthermore, when the mirror body is folded down, the mirror tilt adjustment mechanism is not damaged, and when the mirror body is returned to its normal position from the folded position, it can be used as is without the need to readjust the mirror tilt.

[Brief explanation of drawings]

The drawings show an example of the door mirror described herein. Fig. 1 is a cutaway front view of the main part, Fig. 2 is a cross-sectional plan view of the main part, and Fig. 3 is a longitudinal cross-sectional side view of the main part with some parts omitted. Figure 4 is a vertical cross-sectional view of the joint between the spline shaft and the arm, Figure 5 is a cross-sectional view of the same as above, Figure 6 is a perspective view showing the engagement state of the parallel groove and the pinion, and Figure 7 is the operation. FIG. 8 is a perspective view of a modification of the connection mechanism with the lever shaft, FIG. 9 is a plan view of the operating state shown in FIG. 5, and FIG.
FIG. 0 is a skeletal diagram showing the operation of the tilt adjustment mechanism. 1... Bracket, 2... Base, 3... Cylindrical bearing, 4... Mirror body, 5... Mirror support, 6... Center pivot, 7... Operating lever, 8
...Knob, 9...Mirror holder, 10...Mirror,
20... Shaft, 21... Spline coupling ring, 22... Spline shaft, 23... Cylindrical boss portion, 25... Gear, 28... Fulcrum member, 5
0... Rack, 51a... Axis, 53... Vertical angle adjustment arm (first arm), 54... Vertical angle adjustment link, 60... Left and right angle adjustment arm (second arm),
61...clutch, 62...concave groove, 63...leaf spring, 64...left/right angle adjustment link.

Claims (1)

[Scope of Claims] 1. A cylindrical bearing 3 is installed upright on a base 2 provided on a bracket 1 fixed to the vehicle body, and a mirror body 4 is attached to the bearing so as to be tiltable in the front and rear direction, and is fixed inside the mirror body. In the exterior rearview mirror, a mirror holder 9 that holds a mirror 10 is tiltably attached to a central pivot 6 provided on a support 5, in which a mirror holder 9 is provided inside the cylindrical bearing 3, and serves as a rotation axis when the mirror is tilted. A shaft 20 that can move vertically is inserted inside the bearing, and an operating lever 7 having a fulcrum member 28 is arranged inside the base 2 so that the lever can be freely rotated in the vertical and horizontal directions. , causing one end of the operating lever 7 to protrude into the vehicle interior;
The other end is connected to the lower end of the shaft 20, and a spline coupling 21 consisting of a spline shaft 22 and a cylindrical boss portion 23 into which the spline shaft is inserted is interposed at the upper end of the shaft 20. A rack 50 is formed at the extended end of the spline shaft, and a pinion 51 fixed to a shaft 51a disposed substantially parallel to a horizontal plane along the longitudinal direction of the mirror body is engaged with the rack, and a pinion 51 fixed to the shaft 51a arranged substantially parallel to the horizontal plane along the longitudinal direction of the mirror body is engaged with the rack. At the end,
A first arm 53 is attached that extends in a vertical plane substantially perpendicular to the horizontal plane and is swingable about the axis, while a clutch 61 is attached to the cylindrical boss portion 23 into which the spline shaft 22 is inserted. and extending in a horizontal plane along the longitudinal direction of the mirror body;
A second arm 60 that can swing around the shaft 20 is attached, and the tip of the first arm 53 and the upper part of the center pivot 6 on the back of the mirror holder are connected by a mirror vertical angle adjustment link 54. Also, a mirror left/right angle adjustment link 64 is connected between the tip of the second arm 60 and the side of the center pivot 6 on the back of the mirror holder.
A turn-over type lever remote control rear mirror characterized by being connected by. 2. The turnover-type lever remote control back mirror according to claim 1, wherein the rack 50 is formed such that the outer surface of its tooth tip is curved in a direction perpendicular to the row direction of the teeth. 3. The turnover type lever remote control back mirror according to claim 1, wherein the clutch 61 is a ball clutch.