JPH0417391Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a door mirror whose main body can be tilted toward the vehicle body.

(Prior Art) In general, mirrors attached to vehicles tend to have a large area in order to ensure a rearward visibility range. Therefore, especially in the case of door mirrors that are attached to the vehicle door, the mirror body protrudes from the side of the vehicle, causing problems such as when driving on narrow roads or entering and exiting narrow garages and parking lots. In this case, a problem arises in that the mirror main body easily comes into contact with other objects.

Therefore, in order to solve the above-mentioned problem, the present applicant has provided the door mirror with a drive source and a drive mechanism for rotating and tilting the mirror body in Japanese Patent Application No. 58-251648 (Japanese Unexamined Patent Publication No. 60-143155). We have proposed a system that is equipped with a positioning mechanism for positioning the mirror, and that allows the mirror body to be tilted toward the vehicle or returned to its original state as needed by remote control such as a switch from inside the vehicle. did.

(Problem to be solved by the invention) However, in the case of the above-mentioned conventional technology,
The drive source, drive mechanism, positioning mechanism, etc. mentioned above are arranged with consideration only to ease of installation. For example, if the positioning mechanism is installed outside the vehicle rather than the drive mechanism, space is required for it. As a result, the base member becomes larger, and since the drive source consisting of a motor etc. is large and heavy, the base member also becomes larger depending on the mounting position, and furthermore, the base member and A problem arises in that the mirror body tends to vibrate.

Therefore, the purpose of this invention is to propose an arrangement of the drive source, drive mechanism, positioning mechanism, etc. that takes into consideration the space and vibrations mentioned above, and to make the door mirror smaller and less affected by vibrations caused by the running of the vehicle. is to provide.

(Means and effects for solving the problem) In order to solve the above problem, the present invention disposes a large and heavy drive source 7 inside the base member 6 closer to the vehicle than the drive mechanism 8. In consideration of the influence of resistance, the base member 6, which is formed into a roughly triangular shape that is wide on the vehicle side and narrow in the protruding direction when viewed from above the vehicle, can be installed without almost changing the shape. Since it is located close to the vehicle side, it is less affected by vibrations and the like. Furthermore, since the positioning mechanism 9 is provided between the drive source 7 and the drive mechanism 8, the space created between the drive source 7 and the drive mechanism 8 can be utilized.
Therefore, no extra space is required for arranging the positioning mechanism, and the base member can be made smaller and lighter.

(Embodiments) Preferred embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a front view of the door mirror according to the present invention in its use position, FIG. 2 is a plan view thereof, FIG. 3 is a partially enlarged view of the base member, and FIG. 4 is a sectional view taken along the line of FIG. 3.

First, an overview of the present invention will be explained with reference to FIGS. 1 and 2.

The door mirror 1 has a generally rectangular shape when viewed from the front, and includes a mirror body 4 housing a mirror 3 in a mirror housing 2 formed in the form of a case with a front opening, and a mirror body 4 that is rotated to the front of a door window of a vehicle 5. It consists of a base member 6 which is approximately L-shaped in front view and is fixed to the front part of the door window portion so as to be freely supported. When viewed from above the vehicle, the door mirror 1 is wide toward the vehicle side and narrow in the protruding direction (towards the outside of the vehicle) in order to reduce the influence of air resistance caused by the running of the vehicle. The distal end portion 1b has a generally triangular shape that is inclined rearward compared to the base end portion 1c. The supporting portion 6a of the mirror main body 4 formed near the tip of the base member 6 and the supported portion 4a formed near the rear of the mirror main body 4 are located approximately in the center so that they overlap. , each front part 1 in this part
a and the rear surface portion 1d are formed substantially flush with each other so as to have a smooth shape that follows the overall shape of the door mirror 1 in a plan view.

Now, inside the support portion of the base member 6, there is a drive source 7 for rotating the mirror body 4 to tilt it toward the vehicle 5, and a drive source 7 for rotating the mirror body 4 by the rotation of the drive source 7. Mechanism 8 and the position of the rotated mirror body 4 (rotation position)
A positioning mechanism 9 for positioning is provided.

The drive source 7 and the drive mechanism 8 are disposed approximately on the central axis A-A of the door mirror 1, and the drive source 7 consisting of a motor is located closer to the vehicle 5 than the drive mechanism 8, and its drive shaft 7a is located at the front and back of the vehicle. It is arranged as much as possible to be substantially parallel to the direction. The positioning mechanism 9 is driven by a drive source 7.
The drive mechanism 8 is disposed in a space formed near the front of the base member 6 between the drive mechanism 8 and the drive mechanism 8 . Furthermore, code 1
0 is a power transmission mechanism consisting of a gear train and the like that connects the drive source 7 and the drive mechanism 8.

FIGS. 3 and 4 are partially enlarged views of the base member, and explain this embodiment in more detail.

A through-hole 12 for attaching the holder 11 of the mirror main body 4 is provided approximately at the center of the upper support plate 6a of the base member 6, and a through-hole 12 for supporting the holder 11 is provided at the outer periphery of this hole 12. Support part 1
3 is formed. The holder 11 has a circular outer shape in a plan view, and a cylindrical rotation shaft 14 that is inserted into the base member 6 through a through hole 12 is formed in the center thereof, and a rotation shaft 14 concentrically formed in the outer periphery of the holder 11 is formed. First and second annular projections 15a and 15b are formed, and the holder 11 fits the support portion 13 into a groove 16 formed between the first and second annular projections 15a and 15b, and A retaining washer 17 is provided at the lower end of the first annular protrusion 15a to prevent it from being removed from the support portion 13, and is rotatably supported on the base member 6.

On the other hand, the rotation shaft 14 inserted through the through hole 12 of the upper surface plate 6a of the support section includes, from the shaft end, a clutch spring 18, a spring washer 19, a second displacement member 20, a first displacement member 21, a clutch ball 22... , the clutch plate 23 are inserted in this order, and the clutch plate 23 is fixed to the lower end of the shaft portion 14. The second displacement member 20 is fitted into the outer periphery of the cylindrical portion 21d of the first displacement member 21, and is engaged with the first displacement member 21 with a predetermined play stroke (not shown),
A ring plate 24 having a worm gear 24b formed on the outer circumference 24a is attached to the outer circumferential side 20a by a stop washer 26, a presser spring 27, washers 28, 29, etc. with a predetermined frictional force. The gear 25 of this ring plate 24 is connected to a worm which is fixed to the drive shaft 7a of the motor which is the drive source 7, a worm gear 31 which is engaged with this worm, a worm gear 33 which is engaged with this pinion 31 and a shaft 32, etc. The rotational motion of the drive source 7 is thus transmitted to the second displacement member 20 and the first displacement member 21 via the ring plate 24. By the way, the first displacement member 21 and the clutch plate 23 have recesses 21a, 2 on their opposing surfaces, which are slightly deeper on the first displacement member 21 side and slightly shallower on the clutch plate 23 side.
3a, and are pressed against each other by the elastic force of the clutch spring 18 via the clutch balls 22, ... housed in the recesses 21a, 23a, and these recesses 21a, 23a, the clutch ball 22, and the clutch spring 18 block external force. Configure the clutch for use. Therefore, under normal conditions, the clutch plate 23 rotates following the first displacement member 21, and when an external force of a predetermined magnitude or more acts on the mirror body 4 and is applied to the clutch plate 23, the clutch plate 23 rotates following the first displacement member 21. The clutch ball 22 comes off from the recess 23a of the plate 23, forming a clutch mechanism that rotates idly relative to the first displacement member 21, and the clutch ball 22
After the drive source 7 is removed from the recess 23a, the drive source 7
, the first displacement member 21 and the clutch ball 22 locked in the recess 21a and the clutch plate 23
By rotating the clutch ball 22 against the clutch plate 23, the clutch ball 22 is again accommodated in the recess 23a of the clutch plate 23, and the clutch plate 23 and the first displacement member 21 are engaged, and the clutch plate 23, that is, the mirror body 4 is
It becomes possible to rotate together with the displacement member 21.

Further, a locking member 35 of the positioning mechanism 9 is biased by a spring 36 and engaged with the outer peripheral portion of the first displacement member 21 at a position spaced a predetermined distance in the circumferential direction.
Notches 21b and 21c are provided for determining the rotational position of the mirror body 4, and the locking member 35 and the first displacement member 21 are provided with notches 21b and 21c on the outer periphery of the second displacement member 20 by rotation of a predetermined stroke. 21
cam part 20 for releasing engagement with b, 21c
b is formed (Utility Application No. 59-94683 (Utility Model Application No. 61-10249)). When the locking member 35 engages with the notches 21b and 21c, the first displacement member 21
is completely fixed by this locking member 35.
Therefore, when a large external force is applied to the mirror body 4, the first displacement member 21 is completely fixed, and the external force interrupting clutch is disengaged, that is, the recess 23a
With this, the clutch ball 22 can be reliably removed.

As described above, the drive mechanism 8 according to this embodiment, which is composed of the holder 11, the clutch spring 18, the first and second displacement members 21, 20, the ring plate 24, the clutch ball 22, the clutch plate 23, etc., is configured to rotate by the drive source 7. The transmission is transmitted to the holder 11 to tilt the mirror body 4 toward the vehicle side, and when an impact is applied to the mirror body 4 when the door mirror 1 is in use, the clutch plate 23 is rotated idly by the clutch mechanism and the mirror body is tilted. The portion 4 rotates, and damage caused by impact force can be prevented. Also, the second
A ring plate 24 provided on the displacement member 20 is a presser spring 2
Since the door mirror 1 is attached with a predetermined frictional force by 7, if the mirror body 4 comes into contact with another object such as a utility pole when the door mirror 1 rotates, and this rotation is blocked, the ring plate 24 rotates while sliding with respect to the second displacement member 20, thereby preventing damage due to overload of the drive source. These ring plate 24 and presser spring 27 constitute an overload prevention clutch.

(Effect of the invention) As is clear from the above explanation, according to the door mirror according to the invention, the drive source which requires space is arranged closer to the vehicle than the drive mechanism within the base member, and the positioning mechanism is further arranged between the drive source and the drive mechanism. Because they are placed in the space created between the base members, the space inside the base member, whose shape is almost limited due to the effects of air resistance caused by the running of the vehicle, can be used efficiently, and the size of the base member increases as a result of these arrangements. This problem can be solved. Furthermore, since the drive source is relatively heavy, by arranging it at the above position, it is possible to reduce as much as possible the vibrations of the mirror part due to vibrations of the vehicle running, and the stress applied to the part where the base member is attached to the vehicle. Further, since the present invention is provided with a lock mechanism, the disengagement operation of the external force interrupting clutch becomes more reliable.

[Brief explanation of drawings]

Fig. 1 is a front view of the door mirror according to the present invention in its use position, Fig. 2 is a plan view thereof, Fig. 3 is a partially enlarged view of the base member, and Fig. 4 is a cross-sectional view taken along the line - - of Fig. 3. . In the drawings, 1...Door mirror, 4...Mirror body, 6...Base member, 7...Drive source, 8
. . . drive mechanism, 9 . . . positioning mechanism.

Claims (1)

[Scope of utility model registration request] A base member attached to the side of the vehicle, a mirror body rotatably supported by the base member, and a drive mechanism that rotates the mirror body with respect to the base member using power from a drive source. Becomes,
The drive mechanism includes an external force interrupting clutch that disengages the power transmission system when an external force is applied to the mirror body, and an external force interrupting clutch that disengages the power transmission system when an external force is applied to the mirror body, and a clutch that disengages the power transmission system when the mirror body is rotated. In the door mirror, the door mirror is provided with an overload prevention mechanism that connects and disconnects the power transmission when stopped, and the drive source and the drive mechanism are arranged in the base member, wherein the drive source is located closer to the vehicle than the drive mechanism. 1. A door mirror characterized in that a lock mechanism is provided between the drive source and the drive mechanism to lock the drive mechanism and position the mirror body.