JP2003011724A - Outer mirror device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer mirror device for a vehicle capable of arranging and fixing a drive motor and a control circuit base in a case without using a fixing member such as a screw. SOLUTION: A mirror (stay) is turned and displaced by the drive motor 48 and a transmission unit 45, the control circuit board 51 for controlling the supply of power supply to the drive motor 48 and the drive motor 48 are held in a motor holder 50, and the motor holder 50 is arranged in a holder arrangement space 43d in the case 43 and is fixed by the transmission unit 45.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer mirror device for a vehicle provided with a drive mechanism for enabling so-called electric storage. 2. Description of the Related Art Conventionally, there has been known an outer mirror device for a vehicle in which an outer mirror is rotationally displaced between a use position and a storage position. Further, such an outer mirror device for a vehicle includes a drive motor for rotating the outer mirror, a drive mechanism for transmitting an output from the drive motor to a mirror stay, a power supply to the drive motor, and And a control circuit board for controlling power supply stop when the outer mirror rotates to a predetermined position (see, for example, Japanese Patent Application Laid-Open No. 8-268160). In the vehicle outer mirror device constructed as described above, the drive motor and the control circuit board are fixed to the case or the like by screws, so that the number of parts is reduced. In addition to this, there has been a problem that the assembly cost also rises. An object of the present invention is to provide an outer mirror device for a vehicle in which a drive motor and a control circuit board can be arranged and fixed in a case without fixing members such as screws in order to solve the above problems. I do. According to a first aspect of the present invention, there is provided an outer mirror device for a vehicle, comprising: a drive motor and a drive mechanism for rotating and displacing a mirror; A control circuit board for controlling power supply;
In a vehicle outer mirror device including a case that houses the drive motor, the drive mechanism, and the control circuit board, a motor holder that holds the drive motor and the control circuit board is provided. The gist of the present invention is to dispose it in the holder arrangement space in the case and fix it by the driving mechanism. Next, an embodiment of a vehicle outer mirror device according to the present invention will be described with reference to the drawings. FIG. 9 is an external view of a vehicle outer mirror device. The outer mirror 1 includes a lower support portion 2 directly fixed below the vehicle body, an upper support portion 4 fixed above the vehicle body via a bracket 3, and a substantially U-shaped stay straddling between the support portions 2 and 4. 5 and a plurality of types of mirrors 6, 7, and 8 fixed to the stay 5, and the mirrors 6, 7, and 8 are stored in the use position by rotating both ends of the stay 5 on the same axis O on the upper and lower sides of the vehicle. Position. As shown in FIGS. 1 and 2, the upper support portion 4 is covered by a pair of upper and lower outer cases 41, 42 and housed in an inner case 43. The drive motor unit 44, the transmission unit 45, and the disk -Shaped base 46a and a shaft 46b raised from the center of the base 46a
And a rotating shaft 46 integrally formed with the rotating shaft 46. These constituent members 41 to 46 are arranged above the stay 5, but can be arranged below the stay 5 by reversing the top and bottom and the rotation direction. The drive motor unit 44 includes a drive motor 4
8, drive worm gear 49 provided on output shaft 48a of drive motor 48, motor holder 50, control circuit board 51
It has. As shown in FIGS. 3 and 4, the motor holder 50 includes a base 50c having a pair of positioning pins 50a projecting from below and a hole 50b formed therein, and a base 50c.
c, a through hole 50d through which the output shaft 48a of the drive motor 48 penetrates is formed, and an upright wall 50e against which the output side end face is abutted, and an upper edge portion of the control circuit board 51 which is projected out of the upright wall 50e. An L-shaped reverse facing state in which an engaging tongue piece 50g formed at the tip with a mating engaging claw 50f and an engaging groove 50h engaging from the lower edge to the side edge of the control circuit board 51 are formed. And a support piece 50i having a shape. The control circuit board 51 engages the side edges from the lower edge with the engagement grooves 50h and then engages the upper edge with the engagement claws 50f while deforming the engagement tongue piece 50g. As a result, the engaging tongue piece 50g returns to the original state, and is held without using a fixing tool such as a screw. The transmission unit 45 includes a drive worm gear 4
9, a worm gear 54 provided coaxially with the helical gear 52 via a shaft 53,
An E-ring 55, a rotating gear 56 meshing with the driven worm gear 54, a spring 57, and a clutch plate 58 are provided. The clutch plate 58 is located on the inner bottom surface of the inner case 43 (details will be described later), and the E-ring 55 is fitted to the tip of the shaft 46b with the spring 57 and the rotary gear 56 arranged coaxially with the shaft 46b. As a result, the rotation gear 56 is prevented from coming off. Also, the rotating gear 56
Is formed at the center thereof, and the rotation of the rotary gear 56 can be transmitted to the rotary shaft 46 by inserting a chamfered shaft portion 46c formed near the tip of the shaft 46b into the chamfered hole 56a. it can. Further, a hole 58a is formed substantially at the center of the clutch plate 58,
As shown in FIG. 5, each vertex has a substantially triangular shape with an R shape, and its bottom surface has three regulating claws 58b to 58d at different distances from a center O (coincident with the rotation center O).
Are formed to protrude. As shown in FIGS. 6 and 7, on the upper surface of the base 46a of the rotating shaft 46, the regulating claws 58b to 58d of the clutch plate 58 are eccentric so as to face correspondingly, and the rotation range of the rotating shaft 46 is adjusted. Are formed in three arc-shaped regulating grooves 46d to 46f. Further, an annular groove 46g into which the E-ring 59 is fitted is formed in the middle of the shaft 46b. In the inner case 43, as shown in FIG.
Motor support 43a supporting the rear part of drive motor 48
And a positioning hole 43b engaged with the positioning pin 50a.
(Only one is shown) and a motor holder 50 having a breathing hole 43c for breathing (cooling of the drive motor 48 and the control circuit board 51) with the atmosphere side in a state shifted from the hole 50b is arranged. Holder placement space 43d
A gear space 43e in which the drive worm gear 49 is disposed below and the helical gear 52 is located;
Shaft supporting portion 43f for supporting the driven worm gear 3 and the driven worm gear 54
And the clutch plate 5
Clutch plate installation concave portion 43h substantially matching the shape of FIG.
A hole 43i from which the regulating claws 58b to 58d protrude, and a cylindrical portion 43j through which a base portion of the shaft 46b penetrates and on which an E-ring 59 fitted in the annular groove 46g is located at the upper end surface.
Are integrally formed. Therefore, the helical gear 52 is engaged with the driving worm gear 49 integral with the driving motor 48 in an engaged state.
Is located, and the drive motor 48 is
The drive motor 48 and the control circuit board 51 are positioned in the inner case 43 without using a fixing member such as a screw, since the drive motor 48 and the control circuit board 51 are positioned in the holder arrangement space 43 d while being held integrally with the control circuit board 51. Can be fixed with If the shape of the clutch plate 58 and the shape of the clutch plate installation concave portion 43h are substantially the same, the clutch plate 58 is rotated when the rotary shaft 46 rotates, such as a polygonal shape other than a perfect circular shape. The shape is not particularly limited as long as it does not unexpectedly rotate. In the above configuration, when a switch provided near the driver's seat (not shown) is operated, the drive motor 4
8, the rotating shaft 46 rotates through the gears 49, 52, 54, 56, and the stay 5 rotates. On this occasion,
The restricting claw 58b moves within the restricting groove 46d, and the restricting groove 46e.
The restriction claw 58c moves within the range of the restriction groove 46d, and the restriction claw 58d moves within the range of the restriction groove 46f. When the stay 5 reaches a predetermined use position or a storage position, the regulating claws 58b to 58d are moved to the regulating grooves 46d to 46d.
When reaching the end of 6f, the overload applied to the drive motor 48 is detected, and the drive of the drive motor 48 stops. On the other hand, when a strong rotating force is applied to the rotary shaft 46 by an external force acting on the stay 5 or the like, the regulating claw 58b
The clutch plates 58 are displaced upward in the figure at the same time as the clutch plates 58 to 58d get over the steps at the ends in the rotation direction of the regulating grooves 46d to 46f against the bias of the spring 57, and
On the upper surface of 6a, the sliding contact surface 46k, which is the remaining portion where each of the control grooves 46d to 46f is not formed, is connected to the control claw 58.
The tips of b to 58d slide to allow the stay 5 restricted by the regulating grooves 46d to 46f to rotate beyond a predetermined rotation range. At this time, the rotary shaft 46 rotates on the same plane as when the drive motor 48 rotates in a normal range, and the clutch plate 58 is displaced against the bias of the spring 57. 5 is prevented from being bent. The rotating shaft 46 has a spring 57
The displacement of the clutch plate 58 is permitted by the setting of the biasing force, but the provision of the E-ring 59 promotes the displacement of the clutch plate 58 more reliably and allows the rotation of the rotary shaft 46 on the same plane. it can. As described above, the outer mirror device for a vehicle according to the present invention is provided with the motor holder for holding the drive motor and the control circuit board, and the motor holder is arranged in the holder arrangement space in the case. In addition, the drive motor and the control circuit board can be arranged and fixed in the case without fixing members such as screws by fixing by the drive mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a main part of a vehicle outer mirror device according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a main part, similarly. 3 (A) is a front perspective view of the motor holder, FIG. 3 (B) is a bottom perspective view of the motor holder,
(C) is a rear perspective view of the motor holder. 4A is a front view of the motor holder viewed from the direction of arrow A in FIG. 3A, and FIG. 4B is a vertical sectional view of the motor holder holding a control circuit board. FIG. 5A is a perspective view of the clutch plate in the bottom direction, and FIG. 5B is a plan view of the clutch plate. FIG. 6 is an exploded perspective view illustrating a relationship between a clutch plate and a rotating shaft. FIG. 7A is a plan view of a rotary shaft,
(B) is a side view of the rotating shaft. FIG. 8 is a perspective view of the inner case. FIG. 9 is an external view of a vehicle outer mirror device. [Description of Signs] 5 Stay 48 Drive motor 43 Inner case (case) 43d Holder arrangement space 45 Transmission unit (drive mechanism) 48 Drive motor 50 Motor holder 51 Control circuit board

Claims (1)

1. A drive motor and a drive mechanism for rotating and displacing a mirror, a control circuit board for controlling power supply to the drive motor, the drive motor, the drive mechanism, and the control circuit. An outer mirror device for a vehicle, comprising: a case that houses a board; and a motor holder that holds the drive motor and the control circuit board. The motor holder is arranged in a holder arrangement space in the case, An outer mirror device for a vehicle, wherein the outer mirror device is fixed by a drive mechanism.