JPH11255025A - Mirror tilting unit for vehicle mirror - Google Patents

Abstract

(57) [Problem] To provide a mirror tilting unit of a vehicle mirror capable of realizing smooth tilting of a holder while maintaining ease of assembly. A drive unit is mounted on a base housing fixed to a vehicle mirror main body, and a holder 20 holding the mirror main body has a joint receiving portion 2 having a substantially U-shaped cross section.
0d is formed, and the joint member 2 is attached to the base housing.
1 is swingably held, and a bearing hole 20e is formed in the bearing portion 20d.
Are formed and a shaft 21c that engages with the bearing hole 20e protrudes from both ends of the joint member 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror tilting unit for a vehicle mirror, and more particularly to an outside mirror for a relatively large vehicle such as a truck or a bus, which is stored in a vehicle mirror body and operated by remote control. The present invention relates to a mirror tilting unit of a vehicle mirror suitable for tilting a main body.

[0002]

2. Description of the Related Art Conventionally, there has been known an outside mirror of a relatively large vehicle such as a truck or a bus provided with a mirror tilting unit which is stored in a vehicle mirror main body and tilts the mirror main body by remote control. Have been.

As such a mirror tilting unit, a base housing fixed to a vehicle mirror main body, a driving unit held by the base housing, a holder holding the mirror main body, and the holder can be tilted to the base housing. There is known a device provided with a joint member which swingably engages with a base housing so as to hold the base member (see, for example, JP-A-56-21101).

The joint member has various conditions such as that the entire mirror drive unit is relatively large, that the mirror drive unit is easily assembled, that two drive motors are provided in the base housing, and the like. At the same time, since it is necessary to allow the holder to tilt with respect to the base housing, a bearing portion having a substantially U-shaped cross section is formed on the holder, and the both ends of the joint member are rotatably engaged with this bearing portion. At the same time, the pair of elastically deformable tongues are swingably engaged with the base housing, and the holder can be tilted in any direction by a combination of the rotation direction of the shafts at both ends and the swinging direction of the tongues. I have.

[0005]

By the way, in the mirror tilting unit of the vehicle mirror constructed as described above, the joint member and the holder only press the shaft portions at both ends against the bearing portion. However, there has been a problem that a large load is applied to the bearing from the shafts at both ends, and the holder is difficult to tilt smoothly.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mirror tilting unit of a vehicle mirror capable of realizing a smooth tilting of a holder while maintaining ease of assembly. And

[0007]

In order to achieve the object, an invention according to claim 1 comprises a base housing fixed to a vehicle mirror body and having a drive unit mounted thereon, and a holder for holding the mirror body. A joint member rotatably held by the base housing, and a bearing hole formed in a peripheral wall surface of the holder and a rotating shaft portion protruding from both ends of the joint member are rotatably engaged with each other. In this case, the holder is held by the base housing, and at the same time, the tilt of the holder with respect to the base housing is allowed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a mirror tilting unit for a vehicle mirror according to the present invention will be described with reference to the drawings.

1 to 3, a mirror tilting unit 10 includes a base housing 11 fixed to a vehicle mirror body (not shown), a pair of drive motors 12 held by the base housing 11, and a pair of drive motors. A pair of drive gear units 14 that mesh with each of the output gears 13 provided on the pair 12, a pair of gear rods 15 into which a gear portion 15 a at one end is inserted, and a pair of drive motors 12. A motor cover 16 that individually covers the drive gear unit 14 as a pair, a packing 17 interposed between the base housing 11 and the motor cover 16, and a pair of drive gear units 14 and the motor cover 16. An interposed annular spacer 18,
A dome-shaped variable boot 19 exposing the other end of the gear rod 15 and a holder 20 for holding a mirror body (not shown)
A joint member 21 for holding the holder 20 in a tiltable manner on the base housing 11, and a ring-shaped urging means 2 interposed between the holder 20 and the joint member 21.
2 is provided.

The rectangular base 11 of the base housing 11
4A to 7B, a pair of drive motor housing recesses 11b, a plurality of drive motor holding claws 11c for temporarily holding the drive motor 12, and each drive motor housing recess 11b, as shown in FIGS.
Cylindrical gear rod insertion recess 11d with a bottom
And an annular inclined portion 11e that is located around the gear rod insertion concave portion 11d and protrudes toward the center so as to allow the drive gear unit 14 to tilt, and surrounds the annular inclined portion 11e and the drive motor housing concave portion 11b as a pair. Waterproof wall 11f
A plurality of peripheral walls 11g divided so as to avoid the annular inclined portion 11e, a plurality of engagement holes 11h located outside the waterproof wall 11f, and the base 1 so as to be sandwiched between the waterproof walls 11f.
An engaging rib 11i extending on the diagonal line 1a is formed integrally. An arc-shaped engaging projection 11j is formed on a wall surface of the engaging rib 11i. The corner from the annular inclined portion 11e to the gear rod insertion concave portion 11d is an R-shaped or mortar-shaped receiving portion 11k.

The drive gear unit 14 includes a gear member 23 made of resin and a spring member 2 mounted on the gear member 23.
4 and a cap 25 attached to the gear member 23 so as to cover the spring member 24.

The gear member 23 is shown in FIGS. 8 (A) to 8 (D).
As shown in the figure, a gear portion 23a, a cylindrical spring support shaft 23b erected on the surface side from the gear portion 23a, and a surface of the gear portion 23a at a position opposed to the cylindrical spring support shaft 23b across the center. A tongue piece 23c erected from the side,
A substantially hemispherical supporting portion 23d protruding from the back side of the gear portion 23a, and a supporting portion 23d positioned at the center of the gear portion 23a;
A gear rod insertion hole 23e penetrating the gear portion 23a and a gear portion 23a so as to form the gear rod insertion hole 23e.
Spring seat 23 projecting from the surface side of
f, 23g, and a plurality of cap engaging holes 23h formed near the periphery of the gear portion 23a.

The spring member 24 is shown in FIG.
As shown in (B), a coil portion 24a formed by winding the center and a gear engaging portion 2 formed by opposing both ends 24b and 24c of the coil portion 24a at different levels.
4d. Both ends 24b and 24c are separated from the coil portion 24a and serve as female screws by being inclined in the same direction as the helical angle of the gear portion 15a of the gear rod 15.

The cap 25 is shown in FIGS.
As shown in (E), a substantially hemispherical support portion 25a and a positioning pin 25b protruding from the back side of the support portion 25a.
A gear rod insertion hole 25c formed at the center of the support portion 25a; stepped spring seats 25d and 25e projecting from the back surface side of the support portion 25a so as to form the gear rod insertion hole 25c; And a plurality of engagement projections 25f protruding from the end surface of the hologram.

In order to assemble the drive gear unit 14 having such a structure, as shown in FIG. 11A, the front surface of the gear member 23 and the back surface of the cap 25 face each other.
The arrangement is such that the spring member 24 is located between them.

Then, as shown in FIG. 11B, the end 24b of the spring member 24 having the higher step is connected to the spring seat 23f having the higher step, and the end 2 of the lower step is provided.
The coil part 2 is attached to the cylindrical spring support shaft 23b such that each of the coil springs 4c is positioned on the lower spring seat 23g.
4a is inserted.

At this time, the tongue piece 2 is located between the ends 24b and 24c.
The gap between the ends 24b and 24c tends to open against the bias so that the gear 3c is positioned and the gear 15a is easily inserted.

As a result, erroneous attachment of the spring member 24 to the gear member 23 is prevented. Also, the gear engaging portion 2
Since the temporary holding state is maintained with the minimum distance of 4d, the gear rod 15 can be easily attached to the spring member 24.

Next, as shown in FIG. 11 (C), the positioning pin 25b is inserted into the cylindrical spring support shaft 23b, and at the same time, the plurality of cap engaging holes 23h are engaged with the engaging projections 25f.
The assembly is completed by engaging.

At this time, as shown in FIGS. 12A and 12B, the spring seat 23f having a higher step and the spring seat 25d are opposed to each other, and the spring seat 23g having a lower step is opposed to the spring seat 23g having a lower step. The spring seats 25e are opposed to each other (not shown in FIG. 12), and their protruding end surfaces are inclined along the inclinations of the ends 24b and 24c of the spring member 24, so that each of the seats 23f, 25d and In cooperation with each seat 23g, 25e, the end 24b,
As a result, the spring member 24c is pinched, thereby preventing the spring member 24 from dropping and rattling.

Further, the ends 24b of the spring member 24,
Since the action of separating the gear member 23 and the cap 25 from each other works by changing the height of 24c, play is prevented between the gear member 23 and the cap 25.

The gear rod 15 has a shaft-like gear portion 1.
5a, a substantially spherical head 15c provided at one end of the gear portion 15a via a neck portion 15b, an engagement projection 15d protruding laterally from the head 15c, and a part of the head 15c. A contact surface 15e, which is flat across substantially the entire circumference along the circumferential direction, an anti-sink hole 15f provided inside the projection 15d, and a tapered portion 15g having a tapered tip portion of the gear portion 15a. Have. The tapered portion 15g plays a role of improving workability when inserting the screw portion 15a into the spring member 24.

The motor cover 16 is shown in FIGS.
As shown in (E), the motor cover 16a raised to cover the drive motor 12 and the drive gear unit 1
Step portion 16b stepwise raised so that No. 4 is located
And an opening 16c formed in the center of the step 16b, a spacer installation portion 16d located on the periphery of the opening 16c, and a plurality of engaging legs 16e.

The packing 17 is located between the base housing 11 and the motor cover 16 as shown in FIG. 15 (B) and FIG.
As shown in (C), the front side (motor cover 16)
Side), one ridge 17a is formed at the center of the cross section.
Two protruding strips 17b, 17c are formed. Each of the ridges 17a, 17b, and 17c has an engagement leg 16e engaged with the engagement hole 11h to improve the adhesion between the two by the press-contact force when the motor cover 16 is mounted on the base housing 11. And the waterproof effect can be improved. In addition, each ridge piece 17a, 17b, 17
If the formation position of c is shifted on the front and back of the packing 17,
The same effect can be obtained both when the number is the same on the front and back sides or when one is smaller by one.

As shown in FIGS. 16 (A) to 16 (D), the annular spacer 18 has an annular base portion 18a and a plurality of boot contact pieces raised from the inner peripheral edge of the annular base portion 18a. 18b and an annular ridge 18c formed along the peripheral edge of the annular base 18a.
The portion where the boot contact piece 18b is raised from the inner peripheral edge of the annular base portion 18a is a cap contact portion 1 having a sectional curve.
8d. Further, the adjacent boot contact piece 18
A concave portion 18e is formed between b.

The dome-shaped variable boot 19 is shown in FIG.
As shown in FIG. 17C, a dome-shaped variable portion 19a made of an elastically deformable material such as rubber and an opening 19 are provided.
b, a circular opening fitting groove 19d formed on the outer wall surface of the base 19c, and a detent that prevents the dome-shaped variable boot 19 from rotating by engaging with the recess 18e protruding from the inner wall surface of the base 19c. Sealing projections 19 for performing
e, and a neck support hole 19f formed at the protruding end of the dome-shaped variable portion 19a.

In such a configuration, as shown in FIG. 18, after the above-described drive gear unit 14 is assembled, the gear portion 15a of the gear rod 15 is inserted into the drive gear unit 14 from the gear rod insertion hole 25c. It is inserted into the gear engaging portion 24d and the gear rod insertion hole 23e as it is.

Next, after the opening fitting groove 19d of the dome-shaped variable boot 19 is fitted into the opening 16c of the motor cover 16, the annular spacer 18 is fitted into the opening 19b. At this time, the annular spacer 18 is held by the dome-shaped variable boot 19 by the boot contact piece 18b elastically contacting the sealing projection 19e.

Further, the drive motor unit 12 is temporarily held by the drive motor support claws 11c while being inserted into the drive motor housing recess 11b, and the drive gear unit 1 having the gear rod 15 mounted thereon.
4 is placed on the opening edge of the gear rod insertion concave portion 11d, and the packing 17 is placed on the base 11a.
The motor cover 16 is mounted on the base 11a by engaging e with the engaging hole 11h, and at the same time, the drive motor 12 is held by the cooperation of the drive motor support claw 11c and the motor cover 16.

Since the support portion 25a contacts the cap contact portion 18d, and as shown in FIG. 19A, the contact causes the annular ridge 18c to bite into the base portion 19c.
Waterproofness is ensured. As shown in FIG. 19 (B), an annular ridge 1 is provided at a step 16b near the opening 16c.
By providing the escape groove 16f into which the base 19c pushed out by 8c enters, the waterproofness can be further improved.

Then, the head 15c of the gear rod 15 is exposed from the neck support hole 19f and brought into contact with the neck 15b to complete the assembly of the drive system to the base housing 11.

As shown in FIG. 20, the holder 20 has a substantially regular octagonal flange 20b having a substantially circular opening 20a on the inner periphery.
A flange portion 20c having a curved cross section divided so as to surround the opening 20a, and a pair of joint receiving portions 20d and bearing holes 20e provided at positions facing each other from the inner wall surface of the flange portion 20c. A pair of spring receiving portions 20f provided at positions orthogonal to the joint receiving portion 20d and opposed to each other from the inner wall surface of the flange portion 20c, and a pair of the joint receiving portion 20d and the pair of spring receiving portions 20d sandwiching the one joint receiving portion 20d. Spring receiving part 20
f, and a head receiving portion 20g located on the inner wall surface of the flange portion 20c.

The head receiving portion 20g is shown in FIGS.
As shown in (C), a cylindrical portion 20i divided along the circumferential direction of the opening 20a to form an opening end 20h, an insertion portion 20j formed by dividing the cylindrical portion 20i,
It has a head holding portion 20k formed by recessing the inner wall surface of the cylindrical portion 20i, and a rotation preventing groove 20m formed on the wall surface corresponding to the head insertion opening 20h.

As shown in FIG. 21A, the head holding portion 20k has a concave spherical surface 20n with respect to the center point A and a central point B shifted from the center point A toward the opening end 20h. And a flat concave surface 20p located between the concave spherical surfaces 20n and 20o. In addition, a slit 2 is formed in the head holding portion 20k by undercut.
0q is formed, which facilitates insertion of the head 15c into the head holding portion 20k. The flat surface 20p is formed so as to extend over substantially the entire periphery passing through the vertex as shown in FIG. 21 (C).

As shown in FIGS. 22 (A) to 22 (E), the joint member 21 includes a rod-shaped base portion 21a and a rotating shaft portion 21c protruding from the end surfaces of both end shaft portions 21b of the base portion 21a. , A pair of plate portions 21d protruding from the base portion 21a, and an arc-shaped slit 21e formed in the plate portion 21d.

The ring-shaped urging means 22 is shown in FIGS.
As shown in FIG. 23C, a concave portion 22b formed by bending two opposing portions of an annular base 22a,
and a convex portion 22c formed by bending an annular base 22a at a position orthogonal to b. Also, the annular base 22a
In the attached state, the elasticity is set so that the concavely curved portion 22b is not located on the same plane but is located above the convexly curved portion 22c in FIG.

In such a configuration, as shown in FIG. 24, the ring-shaped urging means 2 is firstly engaged with the holder 20 by engaging the convex curved portion 22c with the spring receiving portion 20f.
2 is placed.

Next, as shown in FIGS. 25 and 26 (A), the rotating shaft portion is opposed to the urging of the ring-shaped urging means 22 in a state where the both end shaft portions 21b are aligned with the concave curved portions 22b. 21c is pressed into the bearing hole 20e. Thus, the ring-shaped urging means 22 is fixed to the holder 20, and the joint member 21 is rotatably held by the holder 20 about the rotation shaft 21c.

At this time, as shown in FIG. 26A, the peripheral wall surface of the rotating shaft portion 21c is made to protrude in a mountain shape so as to be inclined, and is expanded to the open end surface so that the peripheral wall surface of the bearing hole 20e is inclined. As a result, the bearing hole 20e of the rotating shaft portion 21c is formed.
Can be easily engaged.

As shown in FIGS. 26B and 26C, the inclination angle of the peripheral wall surface of the rotating shaft 21c and the bearing hole 20e
By making the inclination angle of the peripheral wall surface different from that of the above, centering of the rotating shaft portion 21c with respect to the bearing hole 20e can be facilitated.

The bottom wall of the joint receiving portion 20d is used as a receiving portion when the rotary shaft portion 21c exceeds the bearing hole 20e when the joint member 21 is mounted on the holder 20 or due to some overload from the holder 20. Also serves as.

In this assembled state, the engagement rib 11
i so as to be sandwiched between the plate portions 21d, and the slit 2
1e is engaged with the engagement protrusion 11j,
The holder 20 is held by the base housing 11 as shown in FIG.

At this time, the holder 20 is provided with the slit 21e.
The base housing 1 is engaged with the engagement protrusion 11j.
1 can swing along the extending direction of the engagement rib 11i. In this swing, the curved flange portion 20c is guided by engaging with the peripheral wall 11g. However, since the flange portion 20c and the peripheral wall 11g are divided, escape (deformation) to an extra load is prevented. Since it is easy, breakage or the like due to the load is prevented.

On the other hand, the holder 20 is
When the head 15c is mounted, the head 15c is inserted from the insertion portion 20j into the head holding portion 20k, and is fitted and held in the head receiving portion 20g.

At this time, as shown in FIGS. 27 (A) to 28 (C), rotation of the head 15c about the axis is prevented by engaging the projection 15d with the rotation preventing groove 20m. A pendulum-shaped rotation indicated by an arrow E in FIG. 27C is allowed. Also, in this pendulum-like rotation,
The gap P is formed between the head end 15c near the opening end 20h and the head holding portion 20k, so that the boundary between the opening end 20h and the head holding portion 20k is worn or broken, and the head 15c is damaged.
Biting into c is prevented.

The gap P is formed by the displacement of the centers A and B due to the concave shape of the head holding portion 20k formed by combining the centers A and B. Further, the flat surface 20p of the head holding portion 15c and the contact surface 15e of the head 15c
As a result, a large contact area with the recess holding portion 20k can be ensured, and the head 15c from the head receiving portion 20g can be secured.
Is prevented from coming off.

When the drive motor 12 is driven, the drive gear unit 14 rotates in response to the rotation of the output gear 13, and as shown in FIGS. 28 (A) to 28 (C), the drive gear unit 14 Spring member 2 linked to rotation
The gear rod 15 is engaged with the
Of the head 15c changes, and this change causes the holder 20 to swing by being guided by the engagement between the rotation shaft 21c or the slit 21e and the engagement protrusion 11j.

At this time, the cap contact portion 18d that contacts the support portion 25a and the receiving portion 11 that contacts the support portion 23d.
Since k is a sectional curve, the gear drive unit 14
Can be easily and reliably performed.

When the holder 20 is tilted, a ring-shaped urging means 22 is provided between the holder 20 and the joint member 21, and the urging of the spring 20 is set in a direction in which the joint member 21 is separated from the holder 20. As a result, the elastic contact force of the portion in contact with only the holder 20 increases, and a substantially uniform load from the ring-shaped urging means 22 is applied to the holder 20, so that the tilt of the holder 20 with respect to the base housing 11 can be smoothly balanced. It is possible to make the tilting as smooth as possible, and to improve the vibration resistance.

The ring-shaped urging means 22 is intended to improve the balance of the tilting of the holder 20 and the vibration resistance by dispersing the load. It is possible.

[0051]

As described above, in the mirror tilting unit for a vehicle mirror according to the present invention, the bearing hole formed in the bearing portion is engaged with the bearing hole projected from both ends of the joint member. With such a shaft, the holder can be smoothly tilted while maintaining ease of assembly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a mirror driving unit, showing a mirror tilting unit of a vehicle mirror according to an embodiment of the present invention.

FIG. 2 is a perspective view of the mirror driving unit.

FIG. 3 is a bottom view of the mirror driving unit.

FIG. 4 is a front view of the base housing.

FIG. 5 is a rear view of the base housing.

FIG. 6 is a plan view of the base housing.

FIG. 7 is a sectional view taken along the line AA of FIG. 4;

8A is a front view of a gear member, FIG. 8B is a cross-sectional view of the gear member, FIG. 8C is a plan view of the gear member, and FIG.
FIG. 4 is a bottom view of the gear member.

FIG. 9A is a front view of a spring member,
(B) is a side view of the spring member.

FIG. 10A is a front view of the cap, and FIG.
Is a sectional view of the cap, (C) is a plan view of the cap,
(D) is a bottom view of the cap, and (E) another cross-sectional view of the cap.

11A is an exploded perspective view of the drive gear unit, FIG. 11B is an exploded perspective view of the drive gear unit with a spring member mounted, and FIG. 11C is a perspective view of the drive gear unit.

FIG. 12A is an exploded sectional view showing a state before the gear member and the cap are assembled, and FIG. 12B is a sectional view showing a state where the gear member and the cap are assembled.

FIG. 13 (A) is a front view of a gear rod,
(B) is a side view of the gear rod, and (C) is a plan view of the gear rod.

FIG. 14A is a plan view of a motor cover,
(B) is a bottom view of the motor cover, and (C) is FIG.
14B is a bottom view based on FIG. 14B, and FIG.
FIG. 14E is a cross-sectional view taken along the line B-B, and FIG. 14E is a cross-sectional view taken along the line C-C in FIG.

15A is a cross-sectional view of a main part showing a sealing state by packing, FIG. 15B is a cross-sectional view of a further enlarged main part of FIG. 15A, and FIG. 15C is a cross-sectional view of the packing. is there.

FIG. 16A is a plan view of a spacer, and FIG.
Is a bottom view of the spacer, (C) is a cross-sectional view of the spacer,
(D) is an enlarged sectional view of a main part of the spacer.

FIG. 17 is also a plan view of the dome-shaped variable boot,
(B) is a bottom view of the dome-shaped variable boot, and (C) is a cutaway view of the dome-shaped variable boot.

FIG. 18 is an enlarged sectional view of a main part of the drive system.

FIG. 19 is an enlarged cross-sectional view of a main part of the seal portion.

FIG. 20 is an exploded perspective view of the mirror holding system.

FIG. 21A is a cross-sectional view of the head receiving portion, and FIG.
FIG. 4 is a front view of a head receiving part, and FIG. 4C is a longitudinal sectional view of a head holding part.

FIG. 22 (A) is a plan view of a joint member,
(B) is a cutaway view of the joint member, (C) is a bottom view of the joint member, (D) is a longitudinal sectional view of a central portion of the joint member, and (E) is a longitudinal sectional view near an end of the joint member. .

FIG. 23A is a plan view of a spring,
(B) is a longitudinal sectional view of the spring, and (C) is a perspective view of the spring as viewed from the back side.

FIG. 24 is an exploded perspective view of the mirror holding system in a state where a spring is attached to the holder.

FIG. 25 is a perspective view of the mirror holding system in an assembled state.

FIG. 26 is an enlarged cross-sectional view of a shaft part.

FIG. 27A is a cross-sectional view of a head receiving part in a head holding state, FIG. 27B is a front view of the head receiving part in a head holding state,
(C) is a longitudinal sectional view of the head holding part in the head holding state.

28A is a cross-sectional view of a drive system in the longest state of the gear rod, FIG. 28B is a cross-sectional view of a drive system in an intermediate state of the gear rod, and FIG. 28C is a cross-sectional view of a drive system in the shortest state of the gear rod. It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Mirror tilting unit 11 ... Base housing 20 ... Holder 20e ... Bearing hole 21 ... Joint member 21b ... Both ends shaft part 21c ... Rotation shaft part

Claims (3)

[Claims] 1. A holder, comprising: a base housing fixed to a vehicle mirror main body and having a drive unit mounted thereon; a holder holding the mirror main body; and a joint member swingably held by the base housing; The holder is held by the base housing by rotatably engaging a bearing hole formed in the peripheral wall surface with a rotation shaft protruding from both ends of the joint member, and at the same time, the holder is held against the base housing. A mirror tilting unit for a vehicle mirror, wherein tilting is permitted. 2. A mirror tilting unit for a vehicle mirror according to claim 1, wherein a peripheral wall surface of said bearing hole and a peripheral wall surface of said rotary shaft portion are formed as inclined surfaces. 3. The vehicle mirror according to claim 1, wherein the peripheral wall surface of the bearing hole and the peripheral wall surface of the rotary shaft are formed at different angles. Mirror tilting unit.