JP2005178656A - Motor-driven mirror - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of components, prevent a cover from rattling, and enhance sealing performance. <P>SOLUTION: The motor-driven mirror 1 is equipped with a base member 1 attached to a vehicle body, a shaft member 3 to be mounted to the base member 2, a case 4 provided with a built-in electric motor 20 and transmitting gears 22 and fixed as capable of rotating round the shaft member 3 within a specified angle range, the cover 5 covering the over-part of the case 4, and a mirror body 6 installed to the case 4. The arrangement includes a seal member 30 installed rigidly to the cover 5 and arranged in a place abutting to the case 4 in such a way of freely distorted and deformed, an locking hole 5d formed in the cover 5, and an locking projection 4a provided on the case 4 and admitting the locking of the hole 5d in a state that the seal member 30 is distorted and deformed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric mirror equipped in an automobile or the like.

  Side mirrors that are foldably attached to automobile doors are generally folded so that the mirror surface faces the side of the vehicle body so that it does not interfere with passersby when the vehicle is parked and when it is parked. It is configured to be rotated by an electric motor in the retracted state.

  As the above-mentioned side mirror, one having the configuration shown in FIG. 5 is known (for example, see Patent Document 1).

The illustrated side mirror includes a base member 100 attached to a door of a vehicle body, a shaft member 101 attached on the base member 100, an electric motor 103, and a drive system (not shown). It has a case 102 that is rotatably attached within an angle range, and a cover 104 that covers the upper part of the case 102, and the cover 104 is fastened to the upper part of the case 102 by a screw member 105. The case 102 is divided into a plurality of parts in order to incorporate the electric motor 103 and the drive system in a predetermined place. Reference numeral 106 in the figure denotes a cushion material for preventing the cover 104 from rattling.
JP-A-8-72613

  However, in the case of using the side mirror, since the cover is configured to be attached to the upper part of the case via a screw member, it is necessary to arrange the screw member as a component, and there is a problem that the number of parts increases. In addition, since a screw member is used, it is necessary to set the cover on the top of the case and perform screwing work. In addition, in order to prevent the backlash of the cover and improve the sealing performance, a separate cover is required between the cover and the case. Since it is necessary to arrange the prepared cushion material, there is also a disadvantage that workability is deteriorated.

  The present invention has been made to solve such problems of the prior art, and provides an electric mirror capable of reducing the number of parts and preventing the backlash of the cover and improving the sealing performance. Objective.

  An electric mirror according to a first aspect of the present invention includes a base member attached to a vehicle body, a shaft member attached to the base member, an electric motor, and a drive transmission system, and rotates around the shaft member within a predetermined angle range. An electric mirror having a case that is movably attached, a cover that covers an upper portion of the case, and a mirror body that is attached to the case, the case being provided integrally with at least one of the case and the cover In a state where the seal member disposed in contact with the cover and deformable and deformable, a locking portion provided on one of the case and the cover, and provided on the other of the case and the cover, the seal member is deformed. And a locked portion on which the locking portion is locked.

  The electric mirror according to a second aspect of the present invention is the electric mirror according to the first aspect, wherein the cover has an opening for receiving the upper end portion of the shaft member, and seals between the opening and the shaft member. A second seal member is provided.

  The electric mirror according to a third aspect of the present invention is the electric mirror according to the first or second aspect, wherein the electric motor is mounted on the inner surface side of the cover in a state where the locking portion is locked to the locked portion. A pressing member capable of being deformed to be pressed downward is provided.

  The electric mirror according to a fourth aspect of the invention is the electric mirror according to the second aspect, wherein the seal member is provided integrally with the cover, and the locking portion is engaged with the inner surface side of the cover. A two-color molding using a same material for the sealing member, the pressing member, and the second sealing member provided with a deformable pressing member that presses the electric motor downward while being locked to the stopper. It is formed by these.

  According to the first aspect of the present invention, since the seal member is integrally provided on at least one of the case and the cover, it is not necessary to prepare a separate seal member, and the number of parts can be reduced. In addition, since the seal member that can be deformed and deformed is disposed at the contact portion between the case and the cover, it is possible to prevent the backlash of the cover. Further, when the seal member is deformed, the locking portion is locked to the locked portion, so that the cover can be attached to the case in a state of receiving a reaction force from the case side, which effectively prevents the cover from rattling. It becomes possible to obtain the sealing performance.

  According to the invention of claim 2, since the second seal member provided around the opening of the cover seals between the shaft member, it is possible to ensure the seal around the shaft member.

  In the third aspect of the invention, when the locking portion is locked to the locked portion, the pressing member provided on the inner surface side of the cover is deformed and presses the electric motor downward. The pressing member absorbs the operation sound generated by the motor, and the quietness can be improved.

  In the case of the invention of claim 4, since the pressing member, the sealing member, and the second sealing member are formed on the cover by the two-color molding with the same material, the pressing member, the sealing member, and the second sealing member are used as the cover. The cover can be formed at the same time, and a cover having all of the pressing member, the seal member, and the second seal member can be formed with good workability.

  Embodiments of the present invention will be specifically described below.

  FIG. 1 is a front sectional view showing an electric mirror according to the present embodiment, FIG. 2 (a) is a front sectional view showing a cover constituting the electric mirror, and FIG. 1 (b) is a partially enlarged view of (a). FIG. 3 is a plan view showing the cover, and FIG. 4 is a bottom view showing the cover.

  The electric mirror 1 includes a base member 2 attached to a vehicle body (not shown), a shaft member 3 attached to the base member 2, and a case 4 attached so as to be rotatable around the shaft member 3 within a predetermined angle range. The cover 5 covers the upper part of the case 4 and the mirror body 6 attached to the case 4.

  The base member 2 is made of, for example, a synthetic resin material and is attached to a door of the vehicle body. The shaft member 3 is made of metal having an axial core in the vertical direction and having an internal cavity whose horizontal cross section is formed in a substantially annular shape, and from the lower side, the fixed portion 10, the sun gear mounting portion 11, and the coil spring mounting portion. Twelve. The fixing portion 10 has a plurality of stepped portions formed on the outer peripheral side thereof, and a plurality of screw holes 10a having an opening on the lower side on the lower surface, three in the present embodiment (one appears in FIG. 1). Is formed. A screw (not shown) is screwed into each screwing hole 10 a from the lower side of the base member 2, whereby the shaft member 3 is fixed to the base member 2.

  The sun gear mounting portion 11 is a portion where a substantially annular sun gear 13 having a gear formed on the outer periphery is inserted, and a stepped portion 11 a for preventing the sun gear 13 from falling is formed on the outer periphery. The coil spring mounting portion 12 is formed in a substantially cylindrical shape, and a coil spring 14 is externally inserted on the outside thereof. A spring presser 15 for pressing and urging the sun gear 13 downward via a coil spring 14 is extrapolated on the upper part of the coil spring mounting portion 12. The spring retainer 15 is a flexible member having an annular portion 15a and a plurality of protrusions 15b projecting inwardly inside the annular portion 15a. The portion is formed with a recess 12a for retaining the protrusion 15b. The spring presser 15 applies a force to the coil spring 14 to press downward.

  The case 4 is an integrally molded product made of, for example, a synthetic resin material, and the supported portion 16 whose lower portion is fitted to the outer periphery of the fixed portion 10 of the shaft member 3, the motor storage portion 17 that stores the electric motor 20, and the electric motor A holding part 18 that accommodates and rotatably holds a drive transmission system 21 for transmitting the rotation of 20 to the sun gear 13 and outside the motor accommodating part 17 (a side away from the supported part 16; FIG. 1) And a mirror main body mounting portion 19 provided on the right side). The mirror body 6 is integrally attached to the mirror body attachment portion 19.

  The supported portion 16 is configured such that the shaft member 3 is inserted from the lower side so that the inner side of the lower portion fits into the outer periphery of the fixed portion 10 of the shaft member 3. 15 is designed so that the inner surface of the cavity 16a does not come into contact with the coil spring 14, the sun gear 13, and the spring retainer 15.

  The motor storage unit 17 is set to store the electric motor 20 with the rotary shaft 20a of the electric motor 20 facing downward, and rotatably supports the lower end of the gear 20b attached to the rotary shaft 20a. .

  The holding portion 18 communicates with the hollow portion 16a and the motor storage portion 17, and the drive transmission system 21 is provided. As this drive transmission system 21, a transmission gear 22 having a gear portion 22a meshing with the gear 20b and a gear portion (worm in the illustrated example) 22b meshing with the sun gear 13 is used in the present embodiment. . Therefore, the transmission gear 22 receives the rotational force of the gear 20 b that accompanies the rotation of the electric motor 20, and transmits the rotational force of the gear portion 22 b that accompanies the rotation of the gear portion 22 a to the sun gear 13. At this time, since the sun gear 13 is attached to the shaft member 3 in a non-rotating state, the case 4 containing the electric motor 20 and the mirror body 6 attached to the case 4 rotate within the above-mentioned predetermined angle range. It comes to move. Further, when a large force is applied to the case 4 or the mirror body 6 in the rotational direction, the sun gear 13 rises against the pressing biasing force of the coil spring 14 to release the meshing with the gear portion 22b. The mirror main body 6 is a mechanism for preventing damage by rotating in the force acting direction in a free state.

  The cover 5 is attached on the case 4 described above. The cover 5 is made of resin and has a lower end formed in a state where the upper end of the case 4 is placed inside. The member 30 is integrally formed. In the present embodiment, the upper end of the case 4 is set to the same height everywhere, and the height position of the entire seal member 30 is also set to the same.

  The cover 5 has an opening 5a that receives the upper end of the shaft member 3, and a second seal member 31 that seals between the shaft member 3 and the opening 5a is integrally provided around the opening 5a. In the present embodiment, the second seal member 31 is formed in an annular shape so as to insert a wiring or the like (not shown) into the internal cavity of the shaft member 3. In addition, when not inserting wiring etc. in the inside of the shaft member 3, the 2nd seal member 31 is good also as a disk shape instead of a ring shape.

  Further, the cover 5 has an annular protrusion 5b on the inner surface side and above the electric motor 20, and a distortion-deformable press that presses the electric motor 20 downward on the lower side of the protrusion 5b. The member 32 is provided integrally. The protrusion 5b is formed in order to support the upper portion of the electric motor 20 by inserting the protruding portion 20a of the upper portion of the electric motor 20 inside thereof. In addition, when the upper part of the electric motor 20 can be supported by the pressing member, the protrusion 5b can be omitted.

  Furthermore, drooping pieces 5c are provided at five locations around the cover 5, respectively. Each drooping piece 5c is formed in such a size that its lower end reaches below the upper end of the case 4, and a locking portion, in this embodiment a locking hole 5d, is formed in the lower part of the drooping piece 5c. . On the other hand, at a height position slightly below the upper end of the case 4, a locked portion, a locking protrusion 4a that enters the locking hole 5d in this embodiment, is formed. Of course, the number of the hanging pieces 5c is not limited to five and may be any number.

  The locking hole 5d and the locking projection 4a are locked by pressing the cover 5 downward from above the case 4 so that the seal member 30 abuts against the upper edge of the case 5 and is distorted and deformed. The member 31 is in contact with the shaft member 3 and is distorted, and the pressing member 32 is deformed by pressing the electric motor 20.

  The sealing member 30, the second sealing member 31, and the pressing member 32 described above all use the same material, for example, TPE (thermoplastic elastomer) in the present embodiment, and are performed simultaneously with the molding of the resin cover 5. It is formed by color molding. Here, the two-color molding is a second member for forming a cover 5 by injection molding a resin for forming a first member, for example, a sealing member 30, a second sealing member 31, and a pressing member 32. This is a method of injection molding. In addition, as a resin for constituting the sealing member 30, the second sealing member 31, and the pressing member 32, a soft material that can be deformed and exhibit a sealing function is used.

  Therefore, in the case of the electric mirror according to the present embodiment, since the seal member 30 is integrally provided on the cover 5, it is not necessary to prepare a separate seal member, and the number of parts can be reduced. Further, since the deformable seal member 30 is disposed at the contact portion between the case 4 and the cover 5, it is possible to prevent the cover 5 from rattling. Further, if the seal member 30 is distorted, the locking projection 4a enters the locking hole 5d and locks, whereby the cover 5 can be attached to the case 4 in a state of receiving a reaction force from the case 4 side. As a result, it is possible to obtain the effect of preventing rattling and to ensure the sealing performance.

  Further, in the case of the present embodiment, the second seal member 31 provided around the opening 5a of the cover 5 seals between the shaft member 3, so that the seal around the shaft member 3 can be secured. Become. Further, when the locking projection 4a enters the locking hole 5d and is in the locked state, the pressing member 32 provided on the inner surface side of the cover 5 is distorted and presses the electric motor 20 downward. The pressing member 32 absorbs the sound, and quietness can be improved. Furthermore, since the pressing member 32, the sealing member 30 and the second sealing member 31 are formed on the cover 5 by the two-color molding with the same material, the pressing member 32, the sealing member 30 and the second sealing member 31 are formed simultaneously. Thus, the cover 5 having all of the pressing member 32, the sealing member 30, and the second sealing member 31 can be formed with good workability.

  In the above-described embodiment, all of the pressing member, the sealing member, and the second sealing member are formed of the same material by two-color molding, but the present invention is not limited to this. For example, one or two of the pressing member, the seal member, and the second seal member may be made of different materials, or all may be made of different materials. Moreover, you may make it shape | mold by the shaping | molding method different from two-color shaping | molding.

  Further, in the above-described embodiment, a locking hole as a locking portion is provided on the cover side, and a locking projection as a locked portion is provided on the case side, but the present invention is not limited thereto, It is good also as a structure which provided the latching protrusion as a to-be-latched part in the cover side, and provided the latching hole as a latching part in the case side. Of course, a locking projection may be provided as the locking portion, and a locking hole or a locking recess may be provided as the locked portion.

It is a front sectional view showing an electric mirror concerning one embodiment of the present invention. (A) is front sectional drawing which shows the cover which comprises the electrically-driven mirror of FIG. 1, (b) is front sectional drawing which expands and shows a part of (a). It is a top view which shows the cover of FIG. It is a bottom view which shows the cover of FIG. It is front sectional drawing which shows the structure of the side mirror of patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric mirror 2 Base member 3 Shaft member 4 Case 4a Locking protrusion (locked part)
5 Cover 5a Opening 5d Locking hole (Locking part)
6 Mirror body 20 Electric motor 22 Transmission gear 30 Seal member 31 Second seal member 32 Pressing member

Claims (4)

A base member that is attached to the vehicle body, a shaft member that is attached to the base member, an electric motor and a drive transmission system, and a case that is rotatably attached within a predetermined angle range around the shaft member. An electric mirror having a cover covering the top of the mirror and a mirror body attached to the case,
A strain-deformable seal member provided integrally with at least one of the case and the cover and disposed at a contact portion between the case and the cover;
A locking portion provided on one of the case and the cover;
An electric mirror comprising: a locked portion that is provided on the other of the case and the cover and that locks the locking portion when the seal member is deformed.   2. The electric mirror according to claim 1, wherein the cover has an opening for receiving an upper end portion of the shaft member, and a second seal member for sealing between the shaft member is provided around the opening. Features an electric mirror.   3. The electric mirror according to claim 1, wherein a distortion-deformable pressing member that presses the electric motor downward in a state where the locking portion is locked to the locked portion on the inner surface side of the cover. An electric mirror characterized by being provided.   3. The electric mirror according to claim 2, wherein the seal member is provided integrally with the cover, and the electric mirror is engaged with the engagement portion on the inner surface side of the cover. A pressing member capable of being deformed and deformed to press the motor downward is provided, and the sealing member, the pressing member, and the second sealing member are formed by two-color molding using the same material. mirror.

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