JPH0378289B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mirror device for a vehicle, particularly for an automobile.

[Conventional technology]

As an automobile mirror device, a mirror assembly is rotatably attached to the outside surface of a front side door via a mirror base, and the mirror assembly is manually rotated between an outwardly extended position and an inwardly folded position. Water-repellent products are increasingly being used.

[Problem that the invention seeks to solve]

Although such a mirror device is convenient in that it can be folded, it is inconvenient in that the mirror assembly must be operated outside the vehicle. Therefore, it would be convenient if the mirror assembly could be operated from inside the car using a motor, but if the rotation axis of the mirror assembly is designed to be far from the mirror base, it would be convenient to install the motor inside the mirror base. , between which the rotational transmission mechanism from the motor to the mirror assembly becomes difficult to use a conventional gear mechanism. This is because in this case, the number of stages in the gear mechanism must be increased or the diameter of the gear must be increased, which increases the size and weight of the device.

The present invention aims to provide a vehicle mirror device that can solve these problems.

[Means for solving problems]

According to the present invention, a vehicle mirror device includes a mirror base fixed to a vehicle body, a rotation shaft rotatably provided upwardly protruding from a support portion protruding outward from the mirror base, and a rotating shaft provided within the mirror base. a motor and
A gear connected to the motor via a reduction mechanism and having a rotation axis parallel to the rotation axis and provided inside the mirror base inside the rotation axis; a first arm protruding outward in the radial direction; a second arm protruding outward in the radial direction at the lower end of the rotation shaft so as to rotate integrally therewith; between a link that connects the ends of both arms and a rotation shaft so as to be rotatable together with the rotation shaft that rotates via the first arm, the link, and the second arm as the motor rotates; The present invention is characterized by comprising a housing base supported on a rotating shaft via a clutch mechanism, a mirror supported on the housing base, and a mirror housing.

[Effect]

With the above configuration, in the present invention, the first arm rotates due to the rotation of the motor, which causes the second arm to rotate via the link, and thus the rotation shaft to rotate. A mirror assembly including a supported housing base etc. is rotated.

〔Example〕

As shown in FIG. 3, the vehicle mirror device according to the present invention includes a mirror base 2 fixed to a vehicle body, for example, a side door, and a mirror assembly 3 rotatably supported by the mirror base 2. There is. The mirror assembly 3 has a mirror housing 5 in which a millimeter 4 is housed. The mirror base 2 has a support portion 2 protruding outwardly at its lower part.
It is integrally equipped with a.

As shown in FIG. 2, the support part 2 of the mirror base
a is formed into a container shape, and has a lid 6 at its upper opening.
is inserted. The lid body 6 has a bearing cylinder part 7, and a rotation shaft 8 is fitted into the bearing cylinder part 7 so as to be rotatable in the vertical direction and protrudes upward. The rotation shaft 8 is a hollow shaft, and a large-diameter portion 8a is provided at the bottom thereof, thereby forming a stepped portion 9. A flange 8b is formed at the lower part of the large diameter portion 8a,
It is in contact with the lower end surface of the bearing cylinder portion 7.

As shown in FIG. 1, a motor M is fixed inside the mirror base 2, and a worm 12 is fixed to an output shaft 11 of the motor M. A worm gear 13 is engaged with the worm 12. The worm gear 13 integrally has shafts 14a, 14b and a square shaft 15, as shown in FIG. It's embedded.

A square hole is fitted into the square shaft 15 of the worm gear 13 at the base end of the first arm 20 . As shown in FIG. 1, the first arm 20 projects radially outward of the worm gear 13 and rotates together with the worm gear 13. A pin 21 is provided at the tip of the first arm 20.
One end of the link 22 is pivotally connected by a pin 23, and the other end of the link 22 is connected to a second arm 24 by a pin 23.
It is pivoted at the tip of the.

As shown in FIG. 4, the second arm 24 has a disk portion 24a having a square hole 25 at its base, and this disk portion 24a has a rotation axis 8 as shown in FIG. It is fitted with a square projection 26 on the lower end surface of the housing through a square hole 25 and fixed with a screw 27. Therefore, the second arm 24 and the rotation shaft 8 rotate together.

At the position of the pin 21 that pivotally connects the first arm 20 and the link 22, the link 22 is attached to the protrusion 29.
It is equipped with The protruding portion 29 comes into contact with a stopper 30 on the side wall of the support portion 2a in a state slightly beyond the dead center position where the first arm 20 and the link 22 are substantially in a straight line.

A radial protrusion 31 is formed on the upper surface of the stepped portion 9 of the rotation shaft 8 . On the other hand, a housing base 33 is mounted on the stepped portion 9. The housing base 33 integrally has a cylindrical portion 33a that is slidably fitted on the outer periphery of the rotation shaft 8.
A radial groove into which the protrusion 31 fits is formed in the lower end surface of 3a. A spring receiver 34 is fitted to the upper end of the rotation shaft 8, and a compression spring 3 is inserted between the spring receiver 34 and the upper surface of the housing base 33.
5 is interposed. Therefore, the housing base 33 is pressed downward by the force of the spring 35, and the groove on the lower surface of the housing base 33 engages with the protrusion 31. Then, the clutch mechanism is configured by their engagement.

As shown in FIG. 2, the housing base 33 has a mirror bracket 36 thereon, and a mirror 4 shown in FIG. 3 is attached to the front surface of the mirror bracket 36 for fine adjustment. Further, the mirror housing 5 is also mounted on the housing base 33. Therefore, housing base 3
3, the mirror 4 and the housing base 5 are also displaced.

To rotate the mirror assembly 3 from the extended normal position to the retracted position as shown in FIGS. 1, 2 and 3, the motor M is driven in one direction. As a result, the worm 12 rotates the worm gear 13, and the first arm 20 rotates in the direction of arrow A in FIG. 1 from the solid line position in FIG. As a result, the link 22 is pulled in the same direction via the pin 21, and the second arm 24 is rotated counterclockwise.
Finally, all the members are in the state shown in FIG.
Therefore, the rotation shaft 8 that is integral with the second arm 24 also rotates in the same direction, and the mirror 4, which was oriented as shown in FIG. 4 in the state shown in FIG. 4, assumes the orientation shown in FIG. It turns out. This means that the entire mirror assembly rotates in this manner. At the end of this rotation, a limit switch (not shown) is closed and the motor M is stopped.

In order to extend the mirror assembly 3 in the retracted position to the normal position, the motor M may be driven in the other direction. This causes the first arm 20 to return from the position shown in FIG. 5 to the position shown in FIG.
The protrusion 29 contacts the stopper 30, and the rotation of the mirror assembly 3 is stopped.
takes a predetermined angular position. Even if an external force is applied, the mirror assembly 3 will not rotate forward beyond its predetermined angular position.

In the case of rotation in any of the directions described above, the rotation of the rotation shaft 8 is transmitted to the housing base 33 via the clutch mechanism (the protrusion 31 and the groove), and the rotation of the mirror assembly 3 is transmitted to the housing base 33. cause. This is because the protrusion 31 and the groove are always engaged by the force of the spring 35.

However, if the rotation of the mirror assembly 3 is blocked by an external force or an obstacle while the mirror assembly 3 is rotating, the clutch mechanism slips (the protrusion 31 escapes from the groove) and the mirror assembly 3 cannot rotate up to the rotation axis 8. However, since the housing base 33 does not rotate, damage to the mirror assembly 3 and the like is prevented.

Note that the clutch mechanism may be of a type in which a clutch plate having sliding resistance is sandwiched between the step portion 9 and the lower surface of the housing base 33 instead of the dog clutch as shown.

〔Effect of the invention〕

As described above, in the present invention, the mechanism for transmitting the rotational force from the motor to the housing base is a link mechanism, so even if the rotation axis of the mirror assembly is far away from the outside, the rotational force can be transmitted using a large and heavy mechanism. There is no need to do this, and the rotational force transmission mechanism can be made inexpensive. In addition, by using a link mechanism, it is possible to accurately and inexpensively control the protruding position of the mirror assembly.
Additionally, the clutch mechanism prevents damage to the device if rotation of the mirror assembly is prevented.

[Brief explanation of drawings]

Fig. 1 is a plan view with some of the main parts of the mirror device of the present invention removed, Fig. 2 is a vertical sectional view of the main parts, Fig. 3 is a perspective view of the whole, and Fig. 4 is a normal view of the link mechanism. FIG. 5 is a plan view showing the state at the retracted position. 2...Mirror base, 2a...Supporting part thereof, 3
...Mirror assembly, 4...Mirror, 5...Mirror housing, 7...Bearing cylinder, 8...Rotation shaft, 9...Step, M...Motor, 12...Worm, 13...Worm gear , 15...square axis, 20
...First arm, 22...Link, 24...Second arm, 29...Protrusion, 30...Stopper, 31...Protrusion (clutch mechanism), 33...Housing base, 33a... Cylinder part, 34... Spring holder, 36... Mirror bracket.

Claims (1)

[Scope of Claims] 1. A mirror base fixed to a vehicle body, a rotation shaft rotatably provided upwardly protruding from a support portion protruding outward from the mirror base, a motor provided within the mirror base, and a motor provided within the mirror base. is connected via a reduction mechanism to
A gear having a rotation axis parallel to the rotation axis and provided inside the mirror base inside the rotation axis, and a gear protruding radially outward from the gear so as to rotate together with the gear. a second arm protruding outward in the radial direction from the lower end of the rotation shaft so as to rotate integrally therewith; and a link connecting the tips of both the first and second arms. , a clutch mechanism is provided between the rotary shaft and the rotary shaft so that the rotary shaft can rotate with the rotary shaft that rotates via the first arm, the link, and the second arm as the motor rotates. A vehicle mirror device comprising a supported housing base, a mirror supported on the housing base, and a mirror housing. 2. The device according to claim 1, wherein a stepped portion is provided in the middle of the rotation shaft, the housing base is mounted on the stepped portion, and a clutch mechanism is provided between the stepped portion and the lower surface of the housing base. Vehicle mirror device. 3. In the normal rotation position where the mirror and the mirror housing protrude outward, the stop that comes into contact with the pivot joint of the first arm and the link and prevents further rotation of the mirror and the mirror housing supports the mirror base. A vehicle mirror device according to claim 1 or 2, which is provided in the vehicle mirror device.