JP3624549B2 - Electric retractable door mirror structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric retractable door mirror structure capable of rotating a mirror between a retracted position and a set position by electric operation.
[0002]
[Prior art]
Conventionally, as this type of electric retractable door mirror structure, there are those described in the new model vehicle manual NISSAN Bluebird (D-27, September 1991, issued by Nissan Motor Co., Ltd.) and Japanese Utility Model Publication No. 6-49203. is there.
[0003]
[Problems to be solved by the invention]
In the conventional electric retractable door mirror structure, when the mirror is set (open) and hits a person or an object, the mirror may move forward by the backlash of the gear of the reduction mechanism of the door mirror structure. In this case, when the circuit is configured in the direction of setting (opening) the mirror (specifically, for example, the electric retractable switch is set to “mirror open” or the electric retractable switch is set to “mirror open” in advance) (When the key switch is turned on or off in the state), the mirror will fall further forward, and it will continue to fall forward until the switch is switched to store the mirror or the power is turned off. There was a problem.
[0004]
The present invention has been made in view of such a problem, and an object thereof is to provide an electric retractable door mirror structure capable of preventing the mirror from falling forward.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention is such that the rotating side member that supports the mirror is rotated by the fixed side member by the pivot shaft of the fixed side member fixed to the vehicle body. When the rotational force of a motor that is pivotally supported and mounted in the rotational member is applied to the pivot shaft via a reduction gear mechanism and a clutch mechanism, the rotational member is caused by a reaction force of the rotational force. The rotating member rotates between the retracted position and the set position, and the rotating member rotates with the rotating member. One fixed member has the storing position and the set of the rotating member. A rotation restricting means is provided, which allows movement of the rotating body along the rotation locus between the positions and provides resistance to the rotating body against movement of the rotating body that deviates from the rotation locus. An electric circuit provided with a circuit for stopping the motor when resistance is given to movement of the moving body. In the retractable door mirror structure, the rotating body moves on the fixed side member at a position where the rotating body has moved from the set position in a direction opposite to the retracted position by a distance corresponding to the backlash of the reduction gear mechanism. On the other hand, there is further provided a restricting means for providing a resistance enough to stop the motor by the circuit.
[0006]
According to a second aspect of the present invention, in the first aspect of the present invention, any one of the rotating body or the rotation restricting means is a protrusion protruding from the rotating side member or the fixed side member, and the rotating body. Alternatively, the other of the rotation restricting means is an arc-shaped groove, and the restricting means is a groove or a protrusion that can be engaged with the rotating body provided apart from the rotation restricting means.
[0007]
According to a third aspect of the present invention, in the first aspect of the present invention, the rotating body is a protrusion that protrudes from the rotation-side member, and the rotation limiting means corresponds to the rotation restriction of the protrusion. It is an arcuate groove, and the restricting means is a raised portion that rises in the direction of the rotating member.
According to a fourth aspect of the present invention, there is provided the method according to the third aspect, wherein the bulging portion is inclined between the arcuate groove and the bulging portion toward the rotating side member toward the bulging portion. A continuous inclined surface is formed, and the protrusion receives a biasing force in the arcuate groove direction by a clutch spring of the clutch mechanism on the inclined surface.
[0008]
【The invention's effect】
According to the first aspect of the present invention, even if the mirror further falls forward, resistance is given to the movement of the rotating body by the restricting means, and the circuit stops the motor, so that further mirror fall is prevented. can do.
According to the second aspect of the present invention, in addition to the operation and effect according to the first aspect, the restricting member is a groove or a protrusion that can be engaged with the rotating body, thereby reliably restricting the movement of the rotating body. And the circuit stops the motor so that further mirror tilting can be prevented.
[0009]
According to the third aspect of the invention, in addition to the operation and effect according to the first aspect, the restricting means made of the raised portion comes into contact with the turning body made of the projecting object, thereby reliably moving the rotating body. Since the circuit stops the motor, the mirror can be prevented from falling further.
According to the fourth aspect of the present invention, in addition to the action and effect according to the third aspect, the protrusion receives the urging force in the arcuate groove direction on the inclined surface. In addition, the protrusion can return to the arc-shaped groove and can automatically return to the normal state.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view showing an arc-shaped groove of an electric retractable door mirror structure showing an embodiment of the present invention, FIG. 2 is a development view of the arc-shaped groove of FIG. 1, and FIG. 3 is a sectional view of the electric retractable door mirror structure. FIG. 4 is a circuit diagram of a motor driving / stopping circuit for driving / stopping a motor having an electric retractable door mirror structure.
[0011]
In FIG. 3, a mirror base (fixed side member) 12 fixed to the vehicle body has a pivot shaft 12a. A pivot side member 14 for supporting a mirror (not shown) is supported by the pivot shaft 12a. It is pivotally supported with respect to.
In the rotating side member 14, a motor 16, a reduction gear mechanism 18 including a worm gear group connected to an output shaft of the motor 16, and a clutch mechanism 20 are mounted. The clutch mechanism 20 includes a clutch spring 20a, a clutch gear 20b, a clutch receiving plate 20c, and a washer plate 20d. The clutch gear 20b is fitted to the pivot shaft 12a so as to be rotatable, and the clutch receiving plate 20c is fitted to the pivot shaft 12a so as not to be relatively rotatable. The clutch spring 20a is inserted between a spring receiver 13 provided on the pivot shaft 12a and the clutch gear 20b, and urges the clutch gear 20b toward the clutch receiving plate 20c.
[0012]
When the rotational force of the motor 16 is applied to the pivot shaft 12a via the reduction gear mechanism 18 and the clutch mechanism 20, the rotational member 14 is rotated by the reaction force of the rotational force.
Two hemispherical concave portions 14a and 14a are formed symmetrically about the pivot shaft 12a on the lower surface of the rotating side member 14, and a ball 22 is fitted in each concave portion 14a. The ball 22 acts as a protrusion (rotating body) that rotates together with the rotating side member 14.
[0013]
On the other hand, an arcuate groove 12c on which the ball 22 slides is formed on the flange surface 12b formed around the pivot shaft 12a of the mirror base 12 (FIG. 1). The arc-shaped groove 12 c allows the ball 22 to roll along the arc-shaped groove 12 c, and the groove wall gives resistance to the ball 22 when the ball 22 tries to be detached from the arc-shaped groove 12 c. When resistance is applied to the ball 22, the motor 16 is stopped by a motor drive / stop circuit 30 described below.
[0014]
4 shows a motor driving / stopping circuit 30 for driving / stopping the motor 16. The motor 16 receives power from the power source 32, and the key switch 34, the electric storage switch 36, the variable resistor PTC 38, and the relay 40. When the electric retractable switch 36 is set to “open” with the key switch 34 being ON, the electric retractable switch 36 is set so that the rotation side member 14 rotates in the mirror retracting direction. When it is “closed”, the motor 16 rotates so that the rotation side member 14 rotates in the mirror setting direction.
[0015]
When the ball 22 of the rotation side member 14 reaches the end wall of the arc-shaped groove 12c, resistance is given to the movement of the ball 22 by the arc-shaped groove 12c, the motor 16 is locked, and the current flowing through the motor 16 increases. . As a result, the resistance value of the variable resistor PTC38 increases, the relay 40 is cut off, and the motor 16 stops.
The arc-shaped groove 12c is formed in the flange surface 12b so as to connect the storage position 24 or the set position 26 of the ball 22, and the ball 22 of the rotation side member 14 can rotate between these. ing. The groove bottoms of the storage position 24 and the set position 26 of the arc-shaped groove 12c are slightly higher than the other portions.
[0016]
Further, as shown in FIG. 2, the flange surface 12b of the mirror base 12 of the present embodiment is provided with a groove 12d as a restricting means, spaced from the arc-shaped groove 12c. The position of the groove 12d is equal to or more than the position 28 where the ball 22 has moved from the set position 26 in the arc-shaped groove 12c in the direction opposite to the retracted position 24 by an amount corresponding to the backlash of the reduction gear mechanism 18. Set a little far away. The groove 12d having a groove bottom approximately equal to the groove bottom at the set position 26 of the arc-shaped groove 12c can be engaged with the ball 22, and the ball 22 is further engaged with the ball 22 in the state where the ball 22 is engaged in the groove 12d. The ball 22 is imparted with a resistance that prevents the motor 16 from moving and stops the motor 16 by the motor drive / stop circuit 30.
[0017]
In the electric retractable door mirror structure configured as described above, when the rotating side member 14 hits a person or an object with the ball 22 in the set position 26, the ball 22 gets over the end wall of the arc-shaped groove 12c. It can move to a position 28 corresponding to the backlash of the reduction gear mechanism 18 shown in FIG. Since the ball 22 does not receive any resistance at this position 28, when the electric retractable switch 36 is "open" in the motor drive / stop circuit 30, or the electric retractable switch 36 is immediately "open". When the key switch 34 is turned on in a state where the ball 22 is on, the motor 16 rotates and the ball 22 further moves in the direction opposite to the set position 26 from the position 28. However, when the ball 22 reaches the groove 12d, the ball 22 12 d is engaged, the movement of the ball 22 is prevented, the motor 16 is locked, and the motor drive / stop circuit 30 stops the rotation of the motor 16.
[0018]
Thus, since the rotation of the rotation side member 14 is stopped, it is possible to prevent the mirror from further falling forward.
If the groove 12d is set to the same position as the position 28 corresponding to the backlash, the ball 22 stays at the position engaged with the groove 12d even if the rotation side member 14 receives an external force. When the key switch 34 is turned on when the motor is in the “open” state or when the electric retractable switch 36 is immediately in the “open” state, the ball 22 is prevented from moving from the groove 12d, and the motor 22 Since the drive / stop circuit 30 stops the rotation of the motor 16, the user does not feel any malfunction without falling forward.
[0019]
In the above-described embodiment, the example in which the arc-shaped groove 12c is provided in the mirror base 12 and the ball 22 as a protrusion is provided in the rotating side member 14 has been described. However, the mirror base 12 has a protrusion such as a ball. The (turning restricting means) may be provided with a circular groove (rotating body) in the turning side member 14. In this case, the arc-shaped groove (rotating body) at a position moved from the set position of the arc-shaped groove (rotating body) to the mirror base 12 by a distance corresponding to the backlash of the reduction gear mechanism in the direction opposite to the retracted position. By providing a restricting means such as a protrusion that restricts the movement of the lens, it is possible to cause the same action as in the first embodiment.
[0020]
Next, FIG. 5 is a view corresponding to FIG. 2 showing another embodiment, and is an example in which a raised portion 12e is provided on the mirror base 12 instead of the groove 12d of FIG. Since the raised portion 12 e prevents the movement of the ball 22, the motor 16 is locked and the motor drive / stop circuit 30 stops the rotation of the motor 16.
Thus, since the rotation of the rotation side member 14 is stopped, it is possible to prevent the mirror from further falling forward.
[0021]
Next, FIG. 6 is a view corresponding to FIG. 2 showing another embodiment. In FIG. 6, the mirror base 12 is provided with a raised portion 12f similar to that in FIG. 5, and is inclined between the arcuate groove 12c and the raised portion 12f toward the rotating side member 14 toward the raised portion 12f. An inclined surface 12g continuous with the raised portion 12f is formed. The inclination angle θ of the inclined surface 12g is set such that the tangential component F · sin θ of the inclined surface 12g of the pressing force F received by the ball 22 by the clutch spring 20a is larger than the friction force received by the ball 22 from the inclined surface 12g. ing. Thus, the ball 22 on the inclined surface 12g receives a biasing force to the arcuate groove 12c. Accordingly, when the rotating member 14 receives an external force with the ball 22 in the set position 26, the ball 22 moves over the end wall of the arcuate groove 12c and moves to the inclined surface 12g. When the load from the outside is eliminated, the ball 22 can return to the arc-shaped groove setting position 26 again by the urging force.
[0022]
In addition, when the key switch 34 is ON and the electric retractable switch 36 is in the “open” state, the ball 22 moves over the end wall of the arc-shaped groove 12c when the rotating member 14 receives an external force and the ball 22 gets over the end wall. While climbing the inclined surface 12g, the movement is finally blocked by the raised portion 12f, and the motor drive / stop circuit 30 stops the rotation of the motor 16. After the motor 16 stops, the ball 22 returns to the arc-shaped groove 12c by the urging force. Accordingly, it is possible to automatically return to the normal state.
[0023]
In the example of FIG. 6, the raised portion 12 f and the inclined surface 12 g are formed from one continuous inclined surface having the same inclination angle, and the tangential component F · sin θ of the presser force F received from the clutch spring 20 a is the motor 16. Thus, the ball 22 can be set to be larger than the force of climbing the inclined surface. In this case, in a state where the key switch 34 is ON and the electric storage switch 36 is “open”, the rotating side member 14 receives an external force and the ball 22 reaches the inclined surface, and then the rotating side member 14. Even when the external force is lost, the arc-shaped groove 12c can be automatically restored without climbing the inclined surface at all.
[Brief description of the drawings]
FIG. 1 is a plan view of an arc-shaped groove of an electrically retractable door mirror structure showing an embodiment of the present invention.
FIG. 2 is a development view of the arc-shaped groove of FIG. 1;
FIG. 3 is a cross-sectional view of an electrically retractable door mirror structure.
FIG. 4 is a circuit diagram of a motor drive / stop circuit for driving / stopping a motor with an electrically retractable door mirror structure.
FIG. 5 is a view corresponding to FIG. 2 showing another embodiment.
FIG. 6 is a view corresponding to FIG. 2 showing another embodiment.
[Explanation of symbols]
12 Mirror base (fixed side member)
12a Pivot shaft 12b Flange surface 12c Arc-shaped groove (turning restricting means)
12d Groove 12e Raised portion 12f Raised portion 12g Inclined surface 14 Rotating side member 16 Motor 18 Reduction gear mechanism 20 Clutch mechanism 20a Clutch spring 22 Ball (rotating body, protrusion)
24 Storage position 26 Set position 28 Position where the ball has moved by an amount corresponding to the backlash of the reduction gear mechanism 30 Motor drive / stop circuit

Claims (4)

A rotating side member that supports the mirror is rotatably supported by the fixed side member by a pivot shaft of the fixed side member fixed to the vehicle body, and the rotational force of the motor mounted in the rotating side member Is applied to the pivot shaft via the reduction gear mechanism and the clutch mechanism, the rotating member rotates between the retracted position and the set position by the reaction force of the rotational force. A rotating body that rotates together with the rotating side member is provided, and one fixed side member allows movement of the rotating body along a rotation locus between a storage position and a set position of the rotating body, and An electric motor provided with a rotation restricting means for giving resistance to the rotating body with respect to the movement of the rotating body about to deviate from the trajectory, and having a circuit for stopping the motor when resistance is given to the movement of the rotating body. In the retractable door mirror structure,
A motor is driven by the circuit against the movement of the rotating body at a position where the rotating body has moved on the fixed side member by a distance corresponding to the backlash of the reduction gear mechanism from the set position in the direction opposite to the storage position. The electric retractable door mirror structure is further provided with a restricting means for providing a resistance to stop the operation. Either the rotating body or the rotation restricting means is a protrusion protruding from the rotating side member or the fixed side member, the other of the rotating body or the rotation restricting means is an arcuate groove, and the restricting means is 2. The electric retractable door mirror structure according to claim 1, wherein the electric retractable door mirror structure is a groove or a protrusion that can be engaged with the rotating body provided at a distance from the rotation restricting means. The rotating body is a protrusion protruding from the rotation side member, the rotation restricting means is an arc-shaped groove corresponding to the rotation restriction of the protrusion, and the restricting means is raised in the direction of the rotation side member. The electric retractable door mirror structure according to claim 1, wherein the electric retractable door mirror structure is a raised portion. Between the arcuate groove and the raised portion, an inclined surface that is inclined toward the rotating side member toward the raised portion and is continuous with the raised portion is formed. 4. The electric retractable door mirror structure according to claim 3, wherein a biasing force in the direction of the arc-shaped groove is received by a clutch spring of a clutch mechanism.

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