JPH082327A - Motor-driven housed door mirror - Google Patents

Abstract

PURPOSE:To provide a motor-driven housed door mirror provided with drive mechanism excellent in assemblage. CONSTITUTION:A clutch 7 movable only in the axial direction to a fulcrum shaft lb, and a gear 8 to which rotation is transmitted from a driving motor 12 through gear mechanism 1 so as to be movable in the axial and rotating directions to the fulcrum shaft 1b are assembled in this order from the lower part after mounting a visor fitting member 2 to the fulcrum shaft 1b. A compression spring 9 is then fitted by a push nut 10, and a protrusion and a recessed part that can be engaged with each other and engaged/released by the relative rotation between both members 2c and 7 (7 and 8) are provided between a base plate 2c and the clutch 7 and between the clutch 7 and the gear 8 so as to dispense with clicking mechanism formed of a spring and a ball. The instability of each part at the assembling time is thereby eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric storage door mirror, and more particularly to a structure of a drive mechanism portion of the electric storage door mirror.

[0002]

2. Description of the Related Art Conventionally, electric retractable door mirrors are generally
As shown in FIG. 5, the base plate 5 fixed to the stay 51
A visor mounting member 53 is rotatably supported on a stand 52 composed of 2a and a fulcrum shaft 52b erected on the visor mounting member 53.
A visor (not shown) is fixed to the.
The visor mounting member 53 is the base plate 52 of the stand 52.
It is integrally configured from a flat plate-shaped base portion 53a overlaid on a, a cylindrical bearing portion 53b fitted to the fulcrum shaft 52b, and a mounting portion 53c to which the visor is fixed. A compression spring 54 is mounted around the bearing portion 53b, and a washer 55, a gear 56, a clutch 57, and a washer 58 are placed on the compression spring 54, and then a C-shaped retaining ring 59 is fixed to the fulcrum shaft 52b. The output rotation of a motor (not shown) fixed to the visor mounting member 53 is transmitted to the gear 56.

The gear 56 can freely rotate and move in the axial direction with respect to the fulcrum shaft 52b, and the clutch 57 has a fulcrum shaft 5a.
It does not rotate with respect to 2b and is movable only in the axial direction. Further, on the contact surface between the clutch 57 and the gear 56,
Although not shown, normally, a protrusion is formed on one side and a concave portion into which the protrusion is fitted is formed on the other side so as to prohibit the rotation of the gear 56. Therefore, the motor is started and the gear 56
When the rotational force is transmitted to the motor, the gear 56 normally does not rotate, so that the motor itself turns about the fulcrum shaft 52b, and the visor attachment member 53 rotates together with the visor accordingly. On the other hand, when the rotation of the visor is hindered for some reason at the time of starting the motor, the projection and the recess between the gear 56 and the clutch 57 are disengaged against the urging force of the compression spring 54, and the gear 56 rotates while descending. Therefore, the motor and gear are prevented from being damaged.

Further, in order to position the visor between the use position which is erected from the door and the storage position which is tilted along the door, a moderation mechanism is provided between the base plate 52a of the stand 52 and the base portion 53a of the visor mounting member 53. Is configured. The moderation mechanism includes a ball 60 housed in a vertical hole 52c formed in a base plate 52a of a stand 52, a spring 61 for pressing the ball 60 against a base portion 53a of a visor mounting member 53, and a visor at a use position and a storage position. The groove 5 formed on the lower surface of the base portion 53a of the visor mounting member 53 so that the ball 60 fits at a certain time.
3d and has a groove 53 between the use position and the storage position.
The ball 60 is fitted into d to hold the position of the visor, but when the motor is started and when an external force is applied to the visor, the visor mounting member 53 is rotated while pushing down the ball 60. .

[0005]

However, this structure has a problem that it is difficult to assemble the drive mechanism around the fulcrum shaft 52b. That is, in the above configuration, first, the spring 61 and the ball 60 are put into the vertical hole 52c of the base plate 52a of the stand 52, and the ball 60 projects upward from the upper surface of the base plate 52a in an unstable state. Since the compression spring 54, the washer 55, the gear 56, the clutch 57, and the washer 58 must be assembled in this order, all the members assembled after the visor mounting member 53 tend to rotate carelessly, and especially the visor mounting member 53 It is difficult to align the visor mounting member 53 with the stand 52 with the groove 53d and the ball 60 engaged with each other, and to combine the both 56 and 57 with the projection and the recess between the gear 56 and the clutch 57 engaged with each other. Met.

A spring is not used as a moderating mechanism between the base plate 52a of the stand and the base portion 53a of the visor mounting member 53, and instead, a protrusion and a recess similar to those formed on the gear 56 and the clutch 57 are used. However, in that case, if the projection comes off the recess or the projection engages with the recess when the visor mounting member 53 rotates, the visor will move up and down, which is not preferable.

Therefore, the technical problem to be solved by the present invention is that the vertical movement does not occur when the visor is driven, and there is no instability at the time of assembling the mechanical parts due to the spring and the ball of the moderating mechanism. An object of the present invention is to provide an electric storage door mirror having an excellent drive mechanism.

[0008]

In order to solve the above technical problems, the electric storage door mirror according to the present invention is constructed as follows. That is, the drive mechanism moves the clutch, the gear, and the compression spring, which are sequentially mounted on the base of the visor mounting member from the bottom with respect to the fulcrum shaft, and the upper end of the compression spring so as to urge the clutch and the gear downward. The clutch is composed of a fixing means such as a retaining ring for positioning on the fulcrum shaft, a drive motor fixed to the visor mounting member, and a gear mechanism connected between the drive motor and the gear. It is movable only in the direction, and the gear is movable in the axial direction and the rotation direction with respect to the fulcrum shaft.

A first projection is formed on one of the contact surfaces of the base portion of the visor mounting member and the clutch, and the first projection is formed on the other of the contact surfaces when the visor is in the use position and the storage position. Is formed, and the first protrusion is configured to be disengaged from the first recess by the relative rotation of the base and the clutch. Also,
A second protrusion is formed on one of the contact surfaces of the clutch and the gear, and a second recess is formed in the other of the contact surfaces of the clutch and the gear. The second protrusion is formed by the relative rotation of the clutch and the gear. It is configured so as to be removed from the two concave portions.

[0010]

[Operation / Effect] In the above structure, the assembling is performed in the following order. First, after passing the bearing portion of the visor mounting member through the fulcrum shaft of the stand, the clutch, the gear, and the compression spring are sequentially passed through the fulcrum shaft from above to attach the fixing means. In this configuration, the spring for the moderation mechanism is not used, and furthermore, the compression spring for urging the clutch is attached to the fulcrum shaft after attaching the visor attachment member, the clutch and the gear, so that the clutch and gear are assembled. At times, there is no instability with respect to the fulcrum axis, and these members can be easily and properly assembled while relatively rotating. For this reason, the time required for assembly can be shortened, so that the total cost can be reduced, and the assembly can be easily automated, which was difficult in the conventional structure due to the instability of each mechanical component.

In the above structure, when the motor is started, its output rotation is transmitted to the gear, but the clutch and the gear, which are not rotated by the fulcrum shaft, are pressed against each other by the compression spring, and the pressure contact surface thereof. Since the protrusion formed in the groove and the groove are engaged, the gear does not normally rotate, but on the contrary, the motor turns around the fulcrum shaft, and the visor mounting member and the visor rotate accordingly. . on the other hand,
If the rotation of the visor is blocked while the motor is running, the engagement between the protrusion and groove between the clutch and gear will disengage, and the gear will inevitably rotate, protecting the motor and gear. . Also, when a rotational force is applied to the visor from the outside, the rotation of the clutch with respect to the fulcrum shaft is restricted, so the clutch moves upward in the axial direction together with the gear against the biasing force of the compression spring. And gears are protected. Therefore, the normal function can be obtained for the protection of the mechanism when the operation of the visor is disturbed during driving, and the protection of the mechanism when the visor is rotated by an external force. Does not happen.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electric storage door mirror according to one embodiment of the present invention shown in FIGS. 1 to 4 will be described in detail below. FIG. 1 is a front view showing a schematic configuration of this door mirror,
2 is a bottom view of the door mirror, FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 2, and FIG. 4 shows the relationship between the protrusion and the recess formed between the visor mounting member and the clutch and between the clutch and the gear. It is sectional drawing shown. Note that FIG. 1 shows the door mirror without the mirror body and its angle adjusting mechanism.

In the figure, 1 is a stand, 2 is a visor mounting member, and in this embodiment, a visor 3 is provided between them.
A visor drive unit is configured by incorporating a drive mechanism for driving the. The stand 1 has a substantially rectangular base plate 1a for fixing the visor 3 to the stay 4 after the visor 3 is attached to the visor drive unit.
And a fulcrum shaft 1b erected on the base plate 1a.

The visor mounting member 2 is composed of a peripheral wall 2b positioned around the fulcrum shaft 1b of the stand 1 and a bottom wall (base) 2c formed at the lower end of the wall 2c. A drive mechanism for driving the visor 3 is housed in the main body 2a. A cover 2d is attached to the main body 2a for the purpose of waterproofing the drive mechanism.

The visor mounting member 2 includes a first mounting portion 2f extending vertically outside the main body portion 2a and a main body portion 2a.
From the lower end of the second protruding in the direction opposite to the first mounting portion 2f
The mounting portion 2g is formed. In the first mounting portion 2f,
Mounting holes A and B are formed, and mounting hole C is formed in the second mounting portion 2g.
Are formed. In addition, each mounting hole A, B,
Mounting parts 3b, 3 having screw holes formed at positions corresponding to C
c and 3d are formed, and the visor 3 is the visor mounting member 2
On the other hand, at these three locations, screws (not shown) can be attached. The visor mounting member 2
The mounting positions of the visor 3 and the visor 3 may be set appropriately. The visor 3 is also formed with a boss 3a for attaching the angle adjusting mechanism 6 of the mirror body 5, so that the angle adjusting mechanism 6 can be directly attached to the visor 3.

On the other hand, a bearing portion 2e is formed on the bottom wall 2c of the visor mounting member 2, and the fulcrum shaft 1b of the stand 1 is inserted into the bearing portion 2e from below. Fulcrum shaft 1d
A clutch 7 and a gear 8 are mounted on the bottom wall 2c. Although not shown, the clutch 7 is connected to the fulcrum shaft 1b by a key, does not rotate with respect to the fulcrum shaft 1b, and is movable only in the axial direction. Also, the gear 8 is
The fulcrum shaft 1b is configured to be movable in both the axial direction and the rotation direction.

FIG. 4 shows a cross section of the contact surface between the bottom wall 2c, which is the base of the visor mounting member 2, and the clutch 7, and a cross section of the contact surface between the clutch 7 and the gear 8. The former represents the former, and the code in parentheses represents the latter. The arrow R indicates the relative rotation direction of both members.
As shown in the drawing, a first projection 2h is formed on the contact surface of the bottom wall 2c of the visor mounting member 2 with the clutch 7, and the clutch 7 has the visor 3 in the use position and the storage position. A first recess 7a into which the first protrusion 2h fits is formed. A second projection 7b is formed on the contact surface of the clutch 7 with the gear 8, and the gear 8 has a second recess 8 into which the second projection 7b fits.
a is formed.

On the other hand, a compression spring 9 is mounted on the fulcrum shaft 1b so as to overlap with the gear 8. Further, the compression spring 9 is bent to urge the clutch 7 and the gear 8 downward. A push nut (fixing means) 10 for positioning the upper end of the compression spring 9 with respect to the fulcrum shaft 1b is fixed. The output rotation of the motor 12 is transmitted to the gear 8 via the reduction gear mechanism 11. The motor 12 is attached to a motor base 12a fixed to the main body 2a of the visor attachment member 2, and the motor base 12a is fitted to the upper end of the fulcrum shaft 1b.

According to this structure, when the motor 12 is started, its output rotation is transmitted to the gear 8, but the fulcrum shaft 1b
Since the clutch 7 and the gear 8 that are prevented from rotating by pressing are pressed against each other by the compression spring, and the protrusion 7b and the groove 8a formed on the pressing surface are engaged, the gear 8 normally does not rotate. Conversely, the motor 12 turns around the fulcrum shaft 1b, and the visor mounting member 2 and the visor 3 rotate accordingly. Further, if the rotation of the visor 3 is blocked while the motor 12 is activated, the clutch 7
The engagement between the projection 7b and the groove 8a between the gear 8 and the gear 8 is disengaged, and the gear 8 is unavoidably rotated while rising, and the motor 12 and the gears 8 and 11 are protected. In addition, visor 3
On the other hand, when a rotational force is applied from the outside, the clutch 7 moves axially upward together with the gear 8 against the biasing force of the compression spring 9 because the rotation of the clutch 7 with respect to the fulcrum shaft 1b is restricted. , Gears 8 and 11 are protected.

In the structure of this embodiment, the assembling is performed in the following order. First, after the fulcrum shaft 1b of the stand 1 is passed through the bearing portion 2e of the visor mounting member 2, the clutch 7, the gear 8 and the compression spring 9 are further attached to the fulcrum shaft 1b.
Are attached in this order to attach the push nut 10. In this configuration, the spring (reference numeral 61 in FIG. 5) for the detent mechanism, which is conventionally used, is not used, and the fulcrum shaft 1b is used.
For the visor mounting member 2, the clutch 7 and the gear 8
Since the compression spring 9 for urging the clutch is mounted after mounting, the positions of the clutch 7 and the gear 8 do not become unstable during assembly, and the visor mounting member 2, the clutch 7 and the gear 8 Can be easily assembled in proper positions while rotating each member relatively. Therefore, according to the present embodiment, the total cost can be reduced by shortening the time required for assembly, and the upper end of the compression spring 9 can be positioned by controlling the pushing stroke of the push nut 10. This facilitates automation of assembly, which was difficult with the conventional structure.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a door mirror according to an embodiment of the present invention, showing a state in which a mirror body and its angle adjusting mechanism are removed.

FIG. 2 is a bottom view of this door mirror.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is a cross-sectional view showing a relationship between a protrusion and a recess formed between a visor mounting member and a clutch and between a clutch and a gear.

FIG. 5 is a sectional view showing a structure of a drive mechanism section of a door mirror according to a conventional example.

[Explanation of symbols]

 1 stand 1a base plate 1b fulcrum shaft 2 visor mounting member 2c base 2e bearing 2f, 2g mounting 2h first protrusion 3 visor 4 stay 5 mirror body 6 angle adjusting mechanism 7-12 drive mechanism 7 clutch 7a first recess 7b 1st 2 Protrusions 8 Gear 8a Second recess 9 Compression spring 10 Push nut (fixing means) 11 Reduction gear mechanism 12 Drive motor

Claims (1)

[Claims] 1. A stand (1) comprising a base plate (1a) fixed to a stay (4) and a fulcrum shaft (1b) erected on the base plate (1a), and the stand (1). ) Of the fulcrum shaft (1b) is rotatably supported, and the base part (2c) whose upper surface is formed perpendicular to the fulcrum shaft (1b) and the mounting part to which the visor (3) is fixed. (2f, 2g) in the electric storage door mirror provided with a visor mounting member (2) having, and a drive mechanism (7 to 12) configured between the stand (1) and the visor mounting member (2), The drive mechanism (7 to 12) is a clutch (7), a gear (8), and a compression unit, which are sequentially mounted on the base (2c) of the visor mounting member (2) with respect to the fulcrum shaft (1b). The spring (9) and the compression spring so as to urge the clutch (7) and gear (8) downward.
Fixing means (10) for positioning the upper end of (9) on the fulcrum shaft (1b)
And a drive motor fixed to the visor mounting member (2)
(12) and a gear mechanism (11) connected between the drive motor (12) and the gear (8), wherein the clutch (7) is axial with respect to the fulcrum shaft (1b). The gear (8) is movable only in the axial direction and the rotation direction with respect to the fulcrum shaft (1b), and the contact between the base portion (2c) of the visor mounting member (2) and the clutch (7). The first protrusion (2h) is formed on one of the surfaces, and the first protrusion (2h) is fitted on the other of the contact surfaces in a state where the visor (3) is in the use position and the storage position. 1
A recess (7a) is formed, and the first protrusion (2h) is configured to be disengaged from the first recess (7a) by relative rotation of the base (2c) and the clutch (7). The second projection (7
b) is formed, and a second recess (8a) into which the second protrusion (7b) fits is formed on the other side, and the second protrusion (7b) is formed in the clutch.
An electric storage door mirror, characterized in that it is configured to be disengaged from the second recess (8a) by relative rotation of the gear (8) and the gear (8).