JPH0443405Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention aims to prevent automobile mirrors from protruding laterally from the vehicle body while the vehicle is running, and tilting toward the front or rear of the vehicle body when it comes into contact with a human body or object. This product relates to electrically retractable door mirrors that are tilted and stored in storage positions at the rear of the vehicle.

BACKGROUND ART Conventionally, this type of electrically retractable door mirror has been known to have various structures. For example, as shown in FIG. 3, a support shaft 31a is fixed to a stay 31 fixed to protrude to the side of the vehicle body, and a rotating portion 32 of a visor 32 is attached to the support shaft 31a.
a rotatably fitted together, and washer 3
3. The gear base 36 is non-rotatably fitted above the rotating part of the support shaft 31a, and the gear 35 is rotatably and releasably locked to the support shaft 31a above the gear base 36. After fitting in this state, the locking ring 39 is used to prevent it from coming off, while a coil spring 34 is fitted to the outer periphery of the rotating portion 32a, and the upper end surface of the coil spring 34 is brought into contact with the lower surface of the washer 33. gear 3
5 is constructed by meshing a drive gear 38 of a drive motor 37. In this structure, the drive gear 38 is rotated by the drive of the drive motor 37, and the gear 38 is rotated around the gear 35 that is locked to the gear base 36, so that the visor 32 is moved to the rotating part 3.
2a around the support shaft 31a, and the visor 32 is rotated between the normal position protruding to the side of the vehicle body and the retracted position tilted along the rear of the vehicle body. When the gear 35 and the gear base 36 are brought into contact with each other, the engagement between the gear 35 and the gear base 36 is released, and the visor 32 is integrated with the gear 35 and the drive gear 38.
Some vehicles are designed to freely rotate from the normal position to a forward tilted position or a rearward tilted position along the front or rear of the vehicle body.

Problems to be solved by the invention However, in the above structure, the support shaft 3
1a, a gear 35 and a gear base 36 are fitted above the rotating portion 32a of the visor 32, so the maximum dimension in the axial direction of the rotating portion 32a of the visor 32 is from the upper surface of the stay 31 to the lower surface of the gear base 36. The dimensions can only be taken up to
Since the axial dimension of 2a is short, there is a problem that rotation of the visor 32 around the support axis becomes unstable.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electrically retractable door mirror in which the visor can stably rotate around the support shaft of the stay, in order to solve the above-mentioned problems.

Means for Solving the Problems In order to achieve the above object, the present inventor proposed that the length of the support shaft is limited to a certain extent due to the structure of the door mirror. We investigated how to increase the axial dimension of the rotating part. Then, by fitting the gear and the gear base to the outer circumferential surface of the rotating part, it was considered whether the axial dimension of the support shaft and the axial dimension of the rotating part could be made substantially the same. The inventor of the present invention also found that the gear base needs to be non-rotatably fitted to the support shaft and cannot be fitted to the outer circumferential surface of the rotating part, but when the gear is locked to the gear base, the support shaft However, we focused on the fact that when the lock with the gear base is released, it should rotate integrally with the rotating part, so we turned the gear base and gear upside down with respect to the support shaft, and created a new design for the visor. A gear is rotatably fitted to the outer circumferential surface of the rotating part, so that the axial dimension of the rotating part of the visor is lengthened by the axial dimension of the gear. That is, a support shaft is provided protruding from the upper surface of the stay, a cylindrical rotating part of the visor is rotatably fitted to the support shaft, and a coil spring is fitted to the lower part of the outer peripheral surface of the rotating part of the visor. ,
A gear that meshes with a drive gear connected to the drive motor is rotatably and axially movably fitted to the upper part of the outer peripheral surface of the rotating part of the visor, and A gear base, in which the gear is locked by the biasing force of the coil spring, is fitted on the tip side so that it cannot rotate freely and cannot come out in the axial direction, and the visor can be rotated between the normal position and the stored position. When rotating the visor manually, the gear is locked to the gear base by the biasing force of the coil spring, making it impossible to rotate with respect to the support shaft.On the other hand, when manually rotating the visor, the gear is locked against the biasing force of the coil spring. The rotating part of the visor is moved toward the axial coil spring side to release the lock between the gear and the gear base, and the gear is configured to freely rotate with respect to the support shaft.

Effect of the invention According to the above structure, when the drive gear rotates due to drive of the drive motor, the gear is locked to the gear base by the biasing force of the coil spring and cannot rotate with respect to the support shaft. rotates around the gear, the visor rotates around the gear,
Position the visor at each of the above predetermined positions. On the other hand, when manually rotating the visor, the gear is moved along the axial direction toward the coil spring due to the forced rotation biasing force against the support shaft of the visor, and the lock between the gear and the gear base is released. , the gear can now rotate freely relative to the support shaft, and even when the drive gear and gear are engaged, the drive gear and gear rotate together around the support shaft, allowing the visor to rotate freely around the support shaft. Rotate to.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings shown in FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the electrically retractable door mirror according to this embodiment has a support shaft 1b fixed to a stay 1 that is fixed to a door of a vehicle body or the like so as to project laterally, and A rotating part 2a of the visor 2 that supports a mirror (not shown) is attached to the shaft 1b.
A coil spring 6 is loosely fitted on the outer peripheral surface of the rotating part 2a, and a gear 5 is rotatably fitted onto the coil spring 6.
A gear base 3 is non-rotatably fitted to the upper part of the rotating part 2a of the support shaft 1b, and the gear 5 is integrally engaged with the gear base 3 by a clutch mechanism, and is fixed to the visor 2. When the drive motor (not shown) is driven, the drive gear 10 connected to the drive motor rotates around the gear 5, and the visor 2 is moved to a predetermined position around the support shaft 1b, that is, the normal position of the mirror (from the vehicle body). Rotate between the forward tilted position (tilted toward the front of the vehicle and along the vehicle body), and the retracted position (tilted toward the rear of the vehicle and along the vehicle body). on the other hand,
When an external force is applied, such as when an object hits the visor 2,
The clutch mechanism between the gear 5 and the gear base 3 is disengaged, so that the gear 5, the drive gear 10, and the drive motor, that is, the visor 2, can freely rotate relative to the support shaft 1b.

The stay 1 has the cylindrical support shaft 1b protruding from the center of the upper surface of the substantially disc-shaped base portion 1a. This support shaft 1b has a notch 1d extending in the axial direction on the outer peripheral surface of its tip portion 1c. A recess 1e is provided at a predetermined location on the outer periphery of the upper surface of the base portion 1b, and a coil spring 9 and a moderation ball 8 biased upward by the coil spring 9 are provided within the recess 1e.

The visor 2 also includes the cylindrical rotating part 2a that supports the mirror and rotatably fits on the support shaft 1b of the stay 1, and the moderation ball 8 is attached to the lower surface of the rotating part 2a. Recesses 2b are formed at corresponding predetermined positions, for example, the normal position, the forward tilted position, and the retracted position of the mirror, and the moderation balls 8 are fit into the respective recesses 2b with moderation, and the visor 2 is held in place. 1 to position the mirror at each position.

Further, the rotating portion 2a of the visor 2 of the support shaft 1b
The gear base 3 is fitted into the portion 1c on the distal side of the portion where the gear base 3 is fitted. The gear base 3 has its protrusion 3a engaged with the notch 1d of the support shaft 1b, making it unrotatable with respect to the support shaft 1b, and comes into contact with the upper end surface of the rotating portion 2a.

A retaining ring 4 is fitted to the upper part of the gear base 3 of the support shaft 1b, and the protruding portion 4 of the retaining ring 4
a is engaged with the notch 1d of the support shaft 1b to make it unrotatable with respect to the support shaft 1b, and a protrusion 4d of the retaining ring 4 that protrudes radially inward engages with the notch 1d of the support shaft 1b. Locked in the recess 1f,
The rotating part 2a of the visor 2, the coil spring 6, the gear 5, and the gear base 3 are prevented from coming off the support shaft 1b in the axial direction of the support shaft 1b.

Further, the gear 5 is connected to the rotating portion 2 of the visor 2.
It is fitted into the upper part of a so as to be rotatable and movable in the axial direction. This gear 5 has a gear portion 5b on its outer peripheral surface, and the gear portion 5b is a drive gear 10 of a drive motor.
mesh with each other. Further, this gear 5 has a protrusion 5a formed at a predetermined position on its upper surface, and this protrusion 5a engages with the recess 3b on the lower surface of the gear base 3 to form a clutch mechanism. That is, the protrusion 5a of the gear 5 engages with the recess 3b of the gear base 3, the gear 5 and the gear base 3 are integrated, and the gear 5 becomes unable to rotate around the support shaft 1b. At this time, when the drive motor is driven, the drive gear 10 rotates around the gear 5 and the visor 2 rotates around the support shaft 1b. On the other hand, if an external force acts on the visor 2, such as when an object hits it, and the rotating portion 2a attempts to forcefully rotate around the support shaft 1b, the gear 5 will resist the biasing force of the coil spring 6. Washer 7 descends and gear 5
The protrusion 5a comes out of the recess 3b of the gear base 3, and the gear 5 becomes able to rotate freely relative to the support shaft 1b, and the visor 2 rotates around the support shaft 1b together with the drive gear 10 meshed with the gear 5. do.

Further, the coil spring 6 is located between the upper surface of the rotating portion 2a of the visor 2 and the lower surface of the gear 5, and is loosely fitted to the outer peripheral surface of the rotating portion 2a, and its upper end portion rotates. The gear 5 is pressed against the gear 5 through the washer 7 fitted to the portion 2a, and the gear 5 is pressed and biased toward the axial tip side of the support shaft 1b, that is, toward the gear base 3, so that the protrusion 5a of the gear 5 is always in contact with the gear base. 3 so as to engage with the recess 3b.

In the electrically retractable door mirror having the above configuration, the visor 2 supporting the mirror has a normal position protruding laterally from the vehicle body with respect to the stay 1, a forward tilting position tilting toward the front of the vehicle body from the normal position, and a forward tilting position tilting forward from the normal position. It rotates around the axis of the support shaft 1b between a normal position and a storage position tilted toward the rear of the vehicle body. That is,
The drive gear 10 connected to the drive motor by the drive motor of the visor 2 is connected to the support shaft 1b so that the gear 5 cannot rotate freely.
The visor 2 rotates around the visor 2 along with the drive gear 10.
rotates around the support shaft 1b of the stay 1, and the visor 2
The mirrors are placed in the specified positions, i.e., the normal position of the mirror (a position that protrudes laterally from the vehicle body), the forward tilted position (a position that is tilted toward the front of the vehicle and along the vehicle body), and the retracted position (a position that is tilted toward the rear of the vehicle and the vehicle body position). On the other hand, if an external force is applied such as when an object hits the visor 2, the gear 5 and gear base 3
The clutch mechanism is disengaged against the biasing force of the coil spring 6, and the gear 5 becomes freely rotatable with respect to the support shaft 1b, and the drive gear 10 and the drive motor, that is, the visor 2, are freely rotated with respect to the support shaft 1b. move.

According to the above embodiment, after the rotating part 2a is fitted to the support shaft 1b, the gear 5 is rotatably fitted to the upper part of the rotating part, and the gear base 3 is fixed to the remaining part of the support shaft 1b. By fitting the ring 4,
In other words, the axial dimension of the rotating part 2a can be increased by the axial dimension of the gear 5 by fitting the gear 5 to the supporting shaft, and the supporting shaft of the rotating part 2a can be increased by that dimension. The support portion for the shaft 1b increases, and the rotation of the visor 2 is stabilized.

In the above embodiments, the present invention can be applied even if the manual/rotational range is from the normal position to the storage position.

Effects of the invention According to the above configuration, the rotating part of the visor and the gear are fitted to the support shaft in an overlapping manner, and the gear is not fitted to the support shaft. In other words, the rotating part of the visor can be extended to the inside of the gear, and the dimension of the rotating part of the visor in the axial direction of the support shaft can be increased by the axial dimension of the gear's support shaft. It is possible,
As the axial dimension of the rotating portion increases, the supporting portion of the rotating portion relative to the support shaft increases, thereby stabilizing the rotation of the visor.

[Brief explanation of the drawing]

1 and 2 are a longitudinal sectional side view and a longitudinal sectional front view of an electrically retractable door mirror according to an embodiment of the present invention, respectively, and FIG. 3 is a longitudinal sectional view of a conventional door mirror. 1... Stay, 1a..., 1b... Support shaft, 1
c..., 2...Visor, 2a...Rotating part, 2b...
... recess, 3 ... gear base, 4 ... retaining ring,
5... Gear, 5a... Protrusion, 6... Coil spring, 7... Washer, 8... Moderation ball, 9... Coil spring, 10... Drive gear.

Claims (1)

[Claims for Utility Model Registration] A visor 2 is rotatably supported on a stay 1 fixed to a vehicle body, and the visor 2 is protruded to the side of the vehicle body by driving a drive motor within the visor 2. In the electrically retractable door mirror, the visor 2 can be manually rotated between the normal position and the retracted position, while the visor 2 can be rotated between the normal position and the retracted position tilted toward the rear of the vehicle body from the normal position. A support shaft 1b is provided protruding from the upper surface of the visor 2, and a cylindrical rotating portion 2a of the visor 2 is rotatably fitted onto the support shaft 1b. Fit the above visor 2
A gear 5 that meshes with a drive gear 10 connected to the drive motor is rotatably and axially movably fitted to the upper part of the outer circumferential surface of the rotating portion 2a, thereby controlling the rotation of the visor 2 of the support shaft 1b. A gear base 3, on which the gear 5 is locked by the biasing force of the coil spring 6, is fitted on the tip side of the portion 2a so that it cannot rotate freely and cannot come out in the axial direction, so that the visor 2 is in its normal position. When rotating between the storage position and
The biasing force of the coil spring 6 locks the gear 5 to the gear base 3 and makes it unrotatable with respect to the support shaft 1b. On the other hand, when manually rotating the visor 2, the gear 5 must resist the biasing force of the coil spring 6. and move the gear 5 to the axial coil spring side of the rotating part 2a of the visor 2, and then connect the gear 5 and the gear base 3.
An electrically retractable door mirror characterized in that the gear 5 is released from the lock and can freely rotate with respect to the support shaft 1b.