JPH032420Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Technical Field of the Invention>> The present invention relates to a door mirror for an automobile. In particular, the present invention relates to an electrically foldable door mirror in which a mirror housing protruding from the outside of the vehicle body can be automatically rotated by an operation inside the vehicle so that the mirror housing can be folded toward the outside of the vehicle body.

<<Prior Art and its Problems>> In general, an automobile door mirror is mounted so as to protrude by l from the outside of the vehicle body, as shown in FIG. This is because the door mirror D is a flat mirror and is close to the driver's viewpoint, so it is necessary to make the mirror larger in order to obtain a sufficient viewing area compared to a fender mirror that uses a convex mirror. This is because there is.

For this reason, the mirror housing housing the mirror has also become larger, and as a result, the door mirror D has inevitably been structured to protrude from the outside of the vehicle body.

However, with this structure, there was a risk that an outside object or person could come into contact with the protruding mirror portion, resulting in an unexpected accident.

Furthermore, the amount of the vehicle to be transported during transportation increases by the amount of the protrusion of the door mirrors, which not only increases transportation costs but also sometimes becomes an obstacle when parking the vehicle in a garage.

In order to solve these problems, for example,
A shock-absorbing door mirror equipped with a tilt holding mechanism has been devised as disclosed in Japanese Patent No. 58-33339.

This door mirror has a mirror housing and a base connected by a hinge plate, and the mirror housing is crimped and held on the base by two tension coil springs. With this structure, when an external impact is applied, the mirror housing tilts in the direction of the impact against the spring pressure of the coil spring, thereby mitigating the impact.

In addition, when transporting the vehicle or storing it in a garage, the mirror housing is artificially tilted against spring pressure to form a gap between the mirror housing and the base. By interposing the tilting holding member, the mirror housing is held in a tilted state with respect to the base, so that it can be folded against the side of the vehicle body.

However, with this conventional technology, the work of tilting the mirror is done manually outside the car, so the work is not easy and may become painful when the mirror has to be tilted many times or on rainy days. Not only that, but it also requires a separate tilting and holding member, which poses problems such as difficulty in parts management.

Therefore, it is desired to make the door mirror an electrically foldable type that can be tilted by remote control from inside the vehicle via a housing drive mechanism. When the door mirrors are electrically foldable, the mirror housing can be adjusted to the mirror set position,
Alternatively, it is necessary to accurately detect rotation to the mirror storage position or the like and control the housing drive mechanism.

[Purpose of the invention] The purpose of the invention is to enable the mirror housing to be tilted to a predetermined position by remote control from inside the vehicle, and to easily and accurately position and hold the mirror housing relative to the fixed axis that is the center of rotation of the mirror housing. An object of the present invention is to provide an electrically foldable door mirror that can accurately detect the rotational position of a mirror housing.

<Configuration of the invention> In other words, the electrically foldable door mirror of the invention is
A base 2 fixed to the door 1, a fixed shaft 6 provided on the base 2, a mirror housing 4 rotatably supported around the fixed shaft 6 and holding the mirror 3 in an adjustable manner; A housing drive mechanism is provided in the mirror housing 4 and drives a planetary gear 18 meshing with a fixed gear 16 supported by the fixed shaft 6 by a drive motor 14 via a deceleration mechanism 15;
The electrically foldable door mirror is equipped with a switch mechanism installed at the center of rotation of the mirror housing 4 to detect a predetermined rotation position of the mirror housing 4, the switch mechanism being a The pattern terminals 39 and 40 are arranged on the pattern holder 38 which is positioned in the axial direction by fitting into the mirror housing 4, and the pattern terminals 39 and 40 are placed on the support member 41 provided in the mirror housing 4 according to the rotation thereof. , Terminal 4 connected to and separated from 40
2, 43 and the pattern holder 38
consists of a first holder piece 44 assembled to the fixed shaft 6 and a second holder piece 45 fitted and attached to the upper surface of the first holder piece 44, sandwiching the pattern terminals 39 and 40. The first holder piece 44 has a flange portion 44b formed on the outer periphery of a cylindrical portion 44a through which the fixed shaft 6 is inserted. A portion 44c is formed, and the fitting leg portion 44c has a fitting surface 44d having an uneven surface facing the fixed shaft 6, and is fitted with the fixed gear 16 supported by the fixed shaft 6. , this fitting portion is located on the opposite side of the meshing portion between the planetary gear 18 and the fixed gear 16 in the set position of the mirror.

<<Description of Embodiments>> FIG. 1 is a partially cutaway schematic front view showing a housing drive mechanism portion of an electrically foldable door mirror according to an embodiment of the present invention.

As shown in the external view shown in FIG. 2, this door mirror has a mirror housing 4 that holds a mirror 3 attached to a base 2 provided on the side surface of a door 1. The housing 4 can be rotated horizontally.

The base 2 is approximately L-shaped and includes a vertical portion 2a along the side surface of the door 1, and a horizontal portion 2b connected to the lower end of the vertical portion 2a and protruding to the side of the door 1. , a mirror housing 4 is attached on the horizontal portion 2b. As shown in FIG. 3, the side surface of the vertical portion 2a facing the mirror housing 4 is rotated about its pivot axis in response to the rotation of the mirror housing 4 in the horizontal direction (direction of arrow A in FIG. 3). It is formed in an arc shape. The outer plate 4a constituting the base end portion of the mirror housing 4 is also formed in an arc shape corresponding to the side surface shape of the vertical portion 2a. Thereby, the mirror housing 4 can be smoothly rotated while being disposed close to the base 2.

Further, a fixed shaft 6 is erected on the horizontal portion 2b of the base 2 via a shaft holder 5, as shown in FIG.

The shaft holder 5 has a cylindrical shape with a flange 5a at its base end, and as shown in FIG.
It is fixed by screwing to b.

The fixed shaft 6 is fixed to the base 2 by fixing its base end to the shaft holder 5 by heavy press fitting.
It is held perpendicularly to the horizontal part 2b of. This fixed shaft 6 is formed into a substantially cylindrical shape, and a cord 7 is inserted inside thereof.

A bracket 9 is inserted into and held in the lower half of the fixed shaft 6 via a bush 8. This bracket 9 is provided with a flange portion 9b at the base end of a cylindrical portion 9a into which the fixed shaft 6 is fitted, and when the flange portion 9b is placed on the upper surface of the flange portion 5a of the shaft holder 5. It is installed in

This bracket 9 is rotatably provided with respect to the fixed shaft 6, and the mirror housing 4 is attached to this bracket 9. This allows the mirror housing 4 to pivot around the fixed shaft 6.

Further, the bracket 9 is provided with a regulating mechanism for holding the bracket 9 at a predetermined rotational position relative to the fixed shaft 6, as shown in FIG. In this mechanism, a compression coil spring 11 is housed in a hole 10 made from the bottom surface of the bracket 9, and a steel ball 12 is placed in the opening of the hole 10.
and this steel ball 12 is attached to the compression coil spring 1.
1, the bracket 9 is fitted into a recess 13 formed on the upper surface of the flange 5a of the shaft holder 5, and the bracket 9 is fitted and held at a rotating position corresponding to the position where the recess 13 is formed. I'm starting to do that. This regulatory mechanism is based on bracket 9
For example, three brackets are provided in the direction around the axis of the shaft holder 5, and are interposed between the bracket 9 and the flange portion 5a of the shaft holder 5 in a well-balanced manner. Note that a bush 12a for guiding the steel ball 12 is attached to the opening of the hole 10.

Further, a housing drive mechanism for rotating the mirror housing 4 is assembled into the cylindrical portion 9a of the bracket 9.

This housing drive mechanism includes a drive motor 14
and a speed reduction mechanism 15 linked to this drive motor 14.
and two planetary gears 17 and 18 that are rotated by a drive motor 14 via the reduction mechanism 15 and mesh with the fixed gear 16 attached to the fixed shaft 16. The fixed shaft 6 is fixed by screwing the gear case 19 into which the gear case 19 is assembled to the cylindrical portion 9a of the bracket 9.
is placed on the side of the This housing drive mechanism will be described in detail below.

The drive motor 14, as shown in FIG.
It is arranged on the lower surface of the gear case 19. That is, a shaft insertion hole 21 is formed in the bottom plate 20 of the gear case 19, and a shaft insertion hole 21 is formed in the bottom plate 20 of the gear case 19.
is arranged with its output shaft 14a protruding into the gear case 19 from the shaft insertion hole 21, and the sixth
As shown in the figure, screws 22b are inserted from the top surface of the bottom plate 20.
It is fixed with screws. That is, the end cap 22 attached to the drive motor 14 has a plurality of screw holes 22a formed therein, as shown in FIG.
It hits the bottom of 0. On the other hand, as shown in FIG. 8, the bottom plate 20 is provided with a through hole 20a corresponding to the screw hole 22a.
The drive motor 14 is fixed to the gear case 19 by screwing the fixing screw 22b inserted from the upper surface of the gear case 0 into the screw hole 22a.

Note that, as shown in the figure, the screw hole 22a is formed in a bottomed shape without penetrating the end cap 22. More specifically, a part of the end cap 22 protrudes into the inside of the drive motor 14. This boss-shaped part has a screw hole 2.
2a is formed in a bottomed shape. By this,
Oil is prevented from entering the drive motor 14 through the screw hole 22a.

Further, the lower end portion of the drive motor 14 mounted in this manner, that is, the end cap 22
The end on the opposite side faces the upper surface of the flange portion 9b of the bracket 9 as shown in FIG. covered in condition. Furthermore, this waterproof cap 23 is disposed within a drain hole 9c provided in the flange portion 9b. Further, on the upper surface of the flange portion 9b,
As shown in FIG. 9, around the drain hole 9c,
An annular protrusion 9d is formed, and a plurality of cutout grooves 9e for draining water are formed in the protrusion 9d. Therefore, water that has entered the mirror housing 4 passes through the cutout groove 9e and is discharged from the drain hole 9c without remaining at the lower end portion of the drive motor 14. Since the lower end portion of the drive motor 14 has a watertight structure, this lower end portion can be placed extremely close to the flange portion 9b side.

On the other hand, as shown in FIG. 1, a sleeve portion 19a is formed on the lower surface of the gear case 19, and covers the upper half of the drive motor 14 from the periphery.
The upper end portion of this drive motor 14 is designed to have a waterproof effect. The lead wire 14b of the drive motor 14 is led out from the side of the end cap 22 and connected to the cord 7 through the lower edge of the sleeve portion 19a.

In addition, the drive motor 1 installed as described above
A small diameter gear 24 and a disk 25 for preventing oil intrusion are attached to the output shaft 14a of No. 4.

As shown in FIG. 5, the small diameter gear 24 faces into the gear case 19 through the shaft insertion hole 21 of the bottom plate 20, and is linked to the speed reduction mechanism 15.

Further, the disc 25 is arranged in the shaft insertion hole 21 on the proximal side of the output gear 24.

The shaft insertion hole 21 is formed to gradually become narrower from the lower end to the upper end, and furthermore, an inward flange portion 21a is formed at the upper end edge to prevent oil from grease etc. from inside the gear case 19. Preventing it from falling as much as possible.

The disc 25 is disposed in the large diameter portion on the lower end side of the shaft insertion hole 21. This disc 25 is
The output shaft 14 is made of synthetic resin or the like.
It is press-fitted and held coaxially with a. This disk 25
has a diameter larger than the diameter of the small diameter portion on the upper end side of the shaft insertion hole 21, and is adapted to catch oil falling downward from the shaft insertion hole 21 on its upper surface. It is rotated by the drive motor 14, and the oil on the upper surface is scattered in the outer radial direction by centrifugal force caused by the rotation. As a result, the drive motor 14 from around the output shaft 14a
It is designed to prevent oil from entering.

In addition, in this embodiment, the disk 25 is in the shape of a flat plate and is hardly bent by the centrifugal force caused by rotation, so that its peripheral edge may come into contact with the inner wall of the shaft insertion hole 21 during rotation. do not have.

Further, the speed reduction mechanism 15 is a speed reduction gear mechanism that includes a plurality of sets of large diameter gears 26 and small diameter gears 27 that are coaxially connected to each other, and the small diameter gear 27 at the front stage.
By meshing with the large-diameter gear 26 at the rear stage, the rotation of the output shaft 14a is sequentially decelerated, and the small-diameter gear 27 at the last stage provided on the upper surface of the gear case 19 is driven to decelerate.

The small-diameter gear 27 at the last stage meshes with the lower planetary gear 17 of the two-ply planetary gears 17 and 18 provided at the upper part of the gear case 19.

Further, the upper planetary gear 18 is connected to a fixed gear 16 attached to the fixed shaft 6, as shown in FIG.
It meshes with the

The planetary gear 17 and the planetary gear 18 are coaxially inserted and supported by a mounting shaft 28 provided upright on the upper surface of the gear case 19, and are rotatable with respect to each other. They are connected together via a load absorbing clutch mechanism. This clutch mechanism includes a clutch claw 29 provided on the upper surface of the planet gear 17, and a clutch pawl 29 provided on the upper surface of the planet gear 17.
A clutch groove 30 is provided on the lower surface of the mounting shaft 28, and the two are engaged with each other by a coil spring 31 disposed on the mounting shaft 28. The clutch pawls 29 and the clutch grooves 30 are formed in three pieces at 120° intervals in the axial direction.
Every time the rotational positions of the gears 18 deviate from each other by 120 degrees, they fit into each other and the planetary gears 17 and 18 are integrally engaged.

Further, the coil spring 31 is connected to the planetary gear 18.
The washer 32 placed on the top surface of the mounting shaft 2
8 and a push nut 33 attached to the tip of the planetary gear 18.
It is elastically biased toward the 7 side. As a result, the planetary gears 17 and 18 normally engage with each other and rotate together. In addition, each planetary gear 17, 1
When an overload is applied to the gears 8 in opposite rotational directions, each clutch pawl 29 and each clutch groove 30 separate against the elastic force of the coil spring 31, and each planetary gear 17, 18 disengages from each other. It's starting to slip and spin idly.

Further, the fixed gear 16 is fitted and fixed to the upper end portion of the fixed shaft 6. That is, the fixed shaft 6 is formed into a cylindrical shape from the lower end to the middle part, and the diameter of the tip is reduced and both sides are approximately D.
It is formed into an irregularly shaped cylinder with a letter-shaped notch. The fixed gear 16 is fitted into the irregularly shaped cylindrical portion of the fixed shaft 6, and is attached in a state where the rotation direction is restricted. Further, a washer 34 is received in a stepped portion formed at the boundary between the cylindrical portion of the fixed shaft 6 and the irregularly shaped cylindrical portion. Further, a push nut 35 is fitted into the irregularly shaped cylindrical portion of the fixed shaft 6, and the fixed gear 16 is held between the washer 34 and the push nut 35 and held at a height corresponding to the planetary gear 18. has been done.

The gear case 19 also includes the drive motor 14, the reduction mechanism 15, and the planetary gears 17, 18.
As shown in FIG.
It is screwed to this cylindrical portion 9a in a state where it is held in place. That is, each cylindrical portion 9a, 19b has two sets of screw mounting holes 36 corresponding to each other formed on the front and back surfaces, respectively, and by inserting the setscrew 37 into the screw mounting holes 36,
fixed in one piece. As a result, the drive motor 14, reduction mechanism 15, and planetary gears 17 and 18 attached to the gear case 19 can be assembled with their drive shafts held parallel to the fixed shaft 6. There is.

The housing drive mechanism assembled in this way has a mounting shaft 2 supporting the planetary gears 17 and 18.
8 can be bent with respect to the fixed shaft 6, and the fixed gear 16 and the planetary gear 18 can be properly engaged with each other. In other words, the mounting shaft 28
is fixed to the upper part of a gear case 19 that is attached to enclose the fixed shaft 6, and this fixed portion is accurately positioned with respect to the fixed shaft 6 by the gear case 19. Since the planetary gears 17 and 18 are disposed near the upper surface of the gear case 19, that is, near the fixed portion of the mounting shaft 28, when subjected to a pressing force in the radial direction due to engagement with the fixed gear 16, Also, the portion of the mounting shaft 28 that supports the planetary gears 17 and 18 does not easily bend, and the planetary gear 18 does not move back from the fixed shaft 6.

Further, since the drive motor 14 is also positioned and fixed relative to the gear case 19, the drive motor 14 can be attached to the flange portion 9b of the bracket 9, for example.
Compared to the case where the speed reduction mechanism 15 and the planetary gears 17 and 18 are positioned and assembled with respect to the drive motor 14, installation errors and deflections of each member are more likely to occur. It also has a small effect on the state of engagement.

Further, a waterproof cover 66 is provided on the upper part of the gear case 19. This waterproof cover 66
is formed into a dome shape corresponding to the structure of the upper part of the gear case 19, and is screwed to the upper part of the gear case 19.

Furthermore, a switch mechanism for detecting the rotation angle of the mirror housing 4 with respect to the fixed shaft 6 is provided at the uppermost end of the fixed shaft 6. As shown in FIG. 10, this switch mechanism has a pattern holder 38 attached to the upper end of the fixed shaft 6.
A pair of pattern terminals 39 and 40 are arranged, and a pair of terminals 42 and 43 are arranged on a support member 41 attached to the upper part of the gear case 19, and as the gear case 19 rotates, each pattern terminal 39 ,40 and terminal 4
2 and 43 are brought into contact with and separated from each other.

This switch mechanism will be explained in detail below.

The pattern holder 38 consists of a first holder piece 44 that is assembled to the fixed shaft 6 and a second holder piece 45 that is fitted and attached to the upper surface of this holder piece 44. Each holder piece 44, 45
is made of insulating material such as synthetic resin,
The pattern terminals 39 and 40 are held in a pinched manner.

The first holder piece 44 is shown in FIG.
As shown in FIG. 2, a flange portion 44b is formed on the outer periphery of a cylindrical portion 44a through which the fixed shaft 6 is inserted. A pair of annular grooves 46 and 47 are concentrically formed on the upper surface of the flange portion 44b. The annular groove portions 46, 47 have pattern fitting portions 46a, 47 formed with a shallow bottom approximately half the circumference.
a, and the remaining approximately half-circumference is deep-bottomed lead wire insertion portions 46b and 47b. As shown in FIG. 13, the pattern terminals 39 and 40 are fitted into the pattern fitting parts 46a and 47a. Further, the lead wire insertion portions 46b, 47b
Lead wires 48 and 49 connected to each of the pattern terminals 39 and 40 are arranged. Note that, as shown in FIG. 11, cutout grooves 44e for guiding the lead wires 48, 49 to the outside of the pattern holder 38 are formed in the lead wire insertion portions 46b, 47b.

Further, on the lower surface of the flange portion 44b, a first
As shown in FIG. 2, fitting leg portions 44c are formed. As shown in FIG. 14, this fitting leg portion 44c has a surface facing the fixed shaft 6 formed as a fitting surface 44d having unevenness, and the fixed gear 16 supported by the fixed shaft 6 is formed as a fitting surface 44d. It is mated with. That is, a part of the outer periphery of the fixed gear 16 is cut out to correspond to the shape of the fitting surface 44d of the fitting leg portion 44c, and by fitting with the fitting surface 44d, the first holder The position of the piece 44 is restricted in the direction around the axis.

Further, as mentioned above, the fixed gear 16 is
It is fitted into the irregularly shaped cylindrical portion of the fixed shaft 6, and is positioned and held in the axial direction of the fixed shaft 6.

Therefore, the holder piece 44 is positioned and held with respect to the fixed shaft 6 by fitting into the fixed gear 16.

Note that, as shown in FIG. 13, the fitting portion between the fitting leg portion 44c and the fixed gear 16 is located on the opposite side of the fitting portion between the planetary gear 18 and the fixed gear 16 at the mirror set position. , so that the operation of the planetary gear 18 is not hindered.

Further, as shown in FIG. 11, a plurality of protrusions 50 for positioning, fitting and holding the second holder piece 45 are formed on the outer circumference of the proximal end of the cylindrical portion 44a of the first holder piece 44. ing. Furthermore, the flange portion 44b is fitted with an outer peripheral edge of the second holder piece 45 on the outer peripheral portion of the flange portion 44b.
A protrusion 51 standing upright above b is formed in the circumferential direction.

Further, the second holder piece 45 is connected to the first holder piece 4 as shown in FIGS. 15 and 16.
It is formed into a substantially annular plate shape that is fitted onto the upper surface of the flange portion 44b of No. 4. That is, this holder piece 45 has a fitting hole 45a formed in the center thereof into which the cylindrical part 44a of the holder piece 44 is inserted, and a fitting notch 52 formed continuously with the fitting hole 45a. is fitted into the protrusion 50 of the holder piece 44, and a part of the outer peripheral edge of the holder piece 45 is fitted into the protrusion 51, so that the upper surface of the flange part 44b of the holder piece 44 is formed around its axis. It is installed while being positioned in the direction.

Furthermore, a fitting piece 53 that protrudes downward is provided on the outer circumference of the lower surface of the second holder piece 45, and this holder piece 45 is connected to the first holder piece 45.
4, it fits into the outermost edge of the notched groove 44e for passing the lead wire described above.

Furthermore, an insertion hole 56 is formed in a portion of the holder piece 45 located inside the fitting piece 53, and lead wires 48 and 49 are led out from this insertion hole 56 and guided to the fixed shaft 6 side. ing.

The second holder piece 45 has a 15th
As shown in the figure, each pattern terminal 3
Cutouts 54 and 55 are formed to allow the terminals 9 and 40 to face the terminals 42 and 43. These notches 54 and 55 are respectively connected to the fixed shaft 6.
A notch 54 for one pattern terminal 39 is cut out continuously in the fitting hole 45a and one fitting notch 52. A notch 55 for the other pattern terminal 40 is formed along the outer periphery of this holder piece 45.

Further, the pattern terminals 39 and 40 are
As shown in FIG. 10, each has a predetermined length, is formed in an arc shape centered on the fixed shaft 6, and is arranged in parallel in the radial direction of the flange portion 44b. . These pattern terminals 39, 40 are made of a conductive material such as phosphor bronze, and as shown in FIG. 17, thin clamping pieces 39a, 39b, 40a, 40b are formed at each end. These pattern terminal 3
The upper surfaces 39c, 40c of 9, 40 are formed into smooth flat surfaces.

And these pattern terminals 39, 40
are fitted into the pattern fitting parts 46a and 47a, and are arranged with one end of each protruding toward the lead wire insertion parts 46b and 47b, as shown in FIG. Lead wires 48 and 49 are soldered and connected to one of the holding pieces 39a and 40a from the lower surface.

Further, each of the holding pieces 39a, 39b, 40
a, 40b fit into the edges of the respective notches 54, 55 of the second holder piece 45 that is attached from the top surface,
It is sandwiched and held between each holder piece 44, 45. That is, the shape of the upper surfaces 39c, 40c of each of the pattern terminals 39, 40 is different from that of each of the notches 5.
It corresponds to the shape of 4 and 55, and the thin clamping piece 3
9a, 39b, 40a, 40b are each notch 54,
It is designed to fit with the edge of 55.

In this sandwiched state, the upper surfaces 39c and 40c of the pattern terminals 39 and 40
It faces upward and is flush with the upper surface of the holder piece 45.

Further, the pattern terminals 39 and 40 held in this manner are arranged as shown in FIG. 19. That is, the upper surface 39a of the inner pattern terminal 39 extends approximately from a position near the mirror set angle indicated by imaginary line C in FIG. 19 to a position including the most forward tilt angle indicated by imaginary line D in FIG. They are arranged over a range of 80°. Also,
The pattern terminal 40 on the outer peripheral side has its upper surface 4
0a is disposed in a range of approximately 180° from a position near the mirror storage angle indicated by imaginary line E in FIG. 19 to a position including the last tilt angle indicated by imaginary line F in the same figure.

On the other hand, the support member 41 is also made of an insulating material such as synthetic resin, and as shown in FIG. This serves as a terminal holding portion 41a.

This terminal holding portion 41a holds the terminals 42 and 43 in parallel in the radial direction of the fixed shaft 6, and as shown in FIG.
holding holes 57, 58 for press-fitting and supporting the proximal ends of the terminals 42, 43, and a slotted groove portion 59 connected to the lower side of the holding holes 57, 58, in which the midway portions of the terminals 42, 43 are disposed; 60 are formed in parallel.

Further, this support member 41 is provided with a substantially cylindrical holder regulating portion 41b arranged around the fixed shaft 6. This holder limit portion 41b allows the first holder piece 44 and the second holder piece 4 to
5 is regulated in position in the direction of its upper surface, and is prevented from coming off.

Further, the terminals 42 and 43 are formed by bending wires made of conductive material as shown in FIG. That is, this terminal 42,
Reference numeral 43 indicates curved portions 42b, 4 which are laterally bent into a U-shape, continuing from the straight proximal ends 42a, 43a.
3b, and the terminal ends of these curved portions 42b, 43b are further extended to form contact portions 42c, 43c that protrude in a U-shape toward the pattern holder 38 side. And these terminal 4
2, 43 are each base end portion 4, as shown in FIG.
2a and 43a in the holding hole 57 of the support member 41,
58, and the slotted groove portion 5.
By arranging the curved portions 42b, 43b at 9, 60, the contact portions 42c, 43c are held in a state in which they protrude from the lower surface of the support member 41. As a result, the terminals 42 and 43 are positioned in the axial direction and are arranged in parallel in the radial direction of the fixed shaft 6, as shown in FIG. The terminal 39 and the other terminal 43 can contact the pattern terminal 40, respectively.

The terminals 42, 43 have their contact portions 42
c, 43c on the upper surface 39 of each pattern terminal 39, 40 as the housing 4 rotates.
c, 40c or the upper surface of the second holder piece 45, and rotates around the fixed shaft 6.
At this time, the terminals 39 and 40 are connected to the 21st
As shown by imaginary lines in the figure, the curved portions 42b, 4
3b is freely bent, and a good contact state between the contact portions 42c, 43c and the pattern terminals 39, 40 can be obtained.

Further, the base end portions 42 of the terminals 42 and 43
a and 43a protrude from the upper surface of the support member 41, and lead wires 61 and 62 are connected to these protrusions by soldering. The switch mechanism configured as described above is connected to a drive circuit as shown in FIG. 23, for example. This drive circuit is configured to change the power supply path from the power source 65 to the drive motor 14 by switching the dual changeover switches 63 and 64, thereby controlling the drive motor 14 in forward and reverse directions. That is, the dual changeover switches 63 and 64 are of a three-state type, and when the movable contacts 63a and 64a are in the neutral state shown in FIG. 23, one of the changeover contacts 63b,
64b or the other switching contact 63c, 64c. The movable contacts 63a, 64a are the switching contacts 63b, 6.
4b, the positive pole of the power source 65 is connected to one connection end of the drive motor 14, and the negative pole is connected to the other connection end of the drive motor 14 via the one pattern terminal 39 and one terminal 42. connected to. As a result, when the pattern terminal 39 and the terminal 42 are in contact with each other, the drive motor 14 rotates in the normal direction, causing the planetary gears 17 and 18 to rotate in the normal direction, so that the mirror housing 4, that is, the terminal 42, is rotated in the normal direction. Turn it in the backward tilting direction (direction of arrow G in FIG. 19). and,
The terminal 42 determines the mirror set angle (19th
When the mirror housing 4 moves to the position indicated by the imaginary line C) in the figure, it moves away from the pattern terminal 39, so that the normal rotation of the drive motor 14 is stopped and the mirror housing 4 is moved away from the pattern terminal 39.
is held by the regulating mechanism at this mirror set position.

Furthermore, when the movable contacts 63a, 64a are switched to the opposite switching contacts 63c, 64c, the positive electrode of the power source 65 is connected to the other connection end of the drive motor 14 via the other terminal 43 and the pattern terminal 40. At the same time, a negative electrode is connected to one connection end of the drive motor 14. As a result, if the pattern terminal 40 and the terminal 43 are in contact with each other, the drive motor 14 is reversely rotated, the planetary gears 17 and 18 are reversely rotated, and the mirror housing 4, that is, the terminal 43 is moved in the forward tilting direction ( Turn in the direction of arrow H in Fig. 19). When the terminal 43 moves to the position of the mirror storage angle (imaginary line E in FIG. 19), it separates from the pattern terminal 40, and the drive motor 14 stops rotating in reverse, and the mirror housing 4 At the stored position, it is held by the restriction mechanism.

In addition, when the mirror housing 4 is rotated manually or when the mirror housing 4 hits an obstacle, the gap between the planetary gears 17 and 18 is adjusted according to the overload caused by this. The clutch mechanism is disengaged, the planetary gears 17 and 18 slip, and the mirror housing 4 is freely tilted. The tilting range of the mirror housing 4 is controlled by a regulating member (not shown) as described above.
It is between the last tilt angle (imaginary line D in the figure) and the most forward tilt angle (imaginary line F in the figure) in the figure. Therefore, within this range, at least one of the pattern terminals 39, 40 and the terminals 42, 4
3 are in contact with each other, and by operating the dual changeover switches 63 and 64 and appropriately rotating the drive motor 14 in the forward and reverse directions, the mirror housing 4 can be rotated to a desired position.

In the electrically foldable door mirror having the above configuration, the first holder piece 45 is inserted into the irregularly shaped cylindrical portion of the fixed shaft 6 and fitted into the fixed gear 16 which is regulated in the direction around the shaft. The pattern holder 38 can be positioned very easily and accurately around the axis.

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways. For example, the present invention may be applied to a switch mechanism consisting of a single terminal or a combination of three or more terminals, or the above-mentioned pattern holder. 38 may be directly fitted into the irregularly shaped portion of the fixed shaft to determine its position.

<<Effect of the invention>> According to the invention, the mirror housing can be freely tilted to a predetermined position by remote control from inside the vehicle.

In addition, the pattern holder 38 of the switch mechanism for detecting the rotational position of the mirror housing 4 is
The pattern terminals 39 and 40 are fitted into the irregularly shaped portion provided on the fixed shaft 6 and positioned in the direction around the axis, and the pattern terminals 39 and 40 are placed on this pattern holder 38,
Support member 41 provided on the mirror housing 4
According to the rotation, the pattern terminal 3
Terminals 42 and 43 are attached to the terminals 9 and 40, and the pattern holder 38 is connected to the first holder piece 44 assembled to the fixed shaft 6.
and a second holder piece 45 which is fitted and attached to the upper surface of the holder piece 44 and holds the pattern terminals 39 and 40 between them.
The holder piece 44 has a flange portion 44b formed on the outer periphery of a cylindrical portion 44a through which the fixed shaft 6 is inserted, and a fitting leg portion 44c is formed on the lower surface of the flange portion 44b. The portion 44c has a fitting surface 44d having an uneven surface facing the fixed shaft 6.
Since the pattern holder 38 is fitted with the fixed gear 16 formed as a 16 to the fixed shaft, the holder piece 44 can be positioned with respect to the fixed shaft 6 at the same time, and this positioning is regulated as a relative position.

Furthermore, according to the present invention, the first holder piece 44
A flange portion 44b is formed on the outer periphery of the cylindrical portion 44a through which the fixed shaft 6 is inserted, and a fitting leg portion 44c is formed on the lower surface of the flange portion 44b. The surface facing the fixed shaft 6 is formed as a fitting surface 44d having unevenness, and is fitted with the fixed gear 16 supported by the fixed shaft 6. Since it is located on the opposite side of the engaging portion between the gear 18 and the fixed gear 16, the engaging portion between the fitting leg portion 44c and the fixed gear 16 is configured so as not to hinder the operation of the planetary gear 18. has been done.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway schematic front view showing the drive mechanism of an electric folding door mirror according to an embodiment of the present invention, Fig. 2 is an external front view of the folding door mirror, and Fig. 3 is the same as Fig. 2. - line sectional view, Figure 4 is a - line sectional view of Figure 2, Figure 5 is an enlarged sectional view showing the housing drive mechanism, Figure 6 is a cross-sectional view of the gear case, and Figure 7 is the upper end surface of the drive motor. A plan view showing
Fig. 8 is an enlarged vertical sectional view showing the screwed part of the drive motor, Fig. 9 is a partially omitted plan view illustrating the shape of the flange part of the bracket, and Fig. 10 is a partially omitted plan view showing the shape of the flange part of the bracket. FIG. 11 is a plan view showing the first holder piece of the switch mechanism; FIG. 12 is a cross-sectional view of the first holder piece; FIG. 13 is a plan view of the switch mechanism. A front sectional view showing the assembled state of the
FIG. 14 is a bottom view showing the positioning state of the first holder piece, and FIG. 15 is a bottom view showing the positioning state of the first holder piece.
FIG. 16 is a side view of the second holder piece, FIG. 17 is a perspective view showing a pair of pattern terminals of the switch mechanism, and FIG.
Fig. 8 is a partially cutaway rear view showing the assembled state of the switch mechanism, Fig. 19 is a plan view showing the arrangement of the pattern terminals, Fig. 20 is a sectional view showing the support member of the switch mechanism, and Fig. 21. is a side view showing a terminal disposed on the support member;
FIG. 2 is a side view showing how the terminal is held on the support member, FIG. 23 is a circuit diagram showing the drive circuit of the electric folding door mirror, and FIG. 24 is an explanatory diagram showing how the door mirror is attached to the vehicle body. It is. 1...Door, 2...Base, 3...Mirror, 4
...Mirror housing, 6...Fixed shaft, 14...
Drive motor, 15... Reduction mechanism, 16... Fixed gear, 17, 18... Planet gear, 19... Gear case, 38... Pattern holder, 39, 40... Pattern terminal, 41... Support member, 42 ,4
3...Terminal, 44...First holder piece, 4
4c...Mating leg portion, 44d...Mating surface, 45...
Second holder piece.

Claims (1)

[Scope of utility model registration request] Base 2 fixed to door 1 and this base 2
a fixed shaft 6 provided in the mirror housing 4, which is rotatably supported around the fixed shaft 6 and holds the mirror 3 in an adjustable manner; A housing drive mechanism that drives a planetary gear 18 meshing with a fixed gear 16 pivotally supported by a drive motor 14 via a reduction mechanism 15; The electrically foldable door mirror is equipped with a switch mechanism that detects a predetermined rotational position, and the switch mechanism is positioned in the direction around the axis by fitting into an irregularly shaped part provided on the fixed shaft 6. Pattern terminals 39 and 40 are arranged on the pattern holder 38, and terminals 42 and 43 are attached to the support member 41 provided on the mirror housing 4 so as to move toward and away from the pattern terminals 39 and 40 according to the rotation of the support member 41, and The pattern holder 3
8 consists of a first holder piece 44 that is assembled to the fixed shaft 6 and a second holder piece 45 that is fitted and attached to the upper surface of the first holder piece 44. The first holder piece 44 has a flange portion 44b formed on the outer periphery of a cylindrical portion 44a through which the fixed shaft 6 is inserted. A mating leg portion 44c is formed, and a surface of the mating leg portion 44c facing the fixed shaft 6 is formed as a mating surface 44d having projections and depressions.
is fitted with the fixed gear 16 supported by the
The electrically foldable door mirror is characterized in that the fitting portion is located on the opposite side of the meshing portion between the planetary gear 18 and the fixed gear 16 in the set position of the mirror.