JPH0349060Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to an electrically foldable door mirror in which a bracket supporting a mirror and a mirror housing is rotated by a drive mechanism.

<Prior Art> This type of electrically foldable door mirror includes a base fixed to the door, a fixed shaft erected on the base, a bracket rotatably attached to the fixed shaft, and the bracket. a mirror housing that is attached to and covers the outside of the mirror housing; a mirror that is adjustable and held in the front opening of the mirror housing; and a planetary gear that is incorporated in the bracket and meshes with a fixed gear that is locked to a fixed shaft. A known device is equipped with a drive mechanism that drives and rotates the bracket, and a switch mechanism that detects the rotational position of the bracket and controls the drive mechanism.

<<Problems to be solved by the invention>> By the way, in such a door mirror, it is necessary to take measures to make the drive mechanism and switch mechanism described above waterproof. However, if the drive mechanism and the switch mechanism are housed in a waterproof case or the like and then assembled into the bracket, the overall size becomes large.

Therefore, it is conceivable to cover and seal the bracket with a gasket or a cover with the drive mechanism etc. built into the bracket. In this case, it is desirable that the bracket has a structure that covers the drive mechanism and the like as much as possible, for example, a half-dome shape with an open front surface.

However, when the bracket is formed in this manner, there is a problem that the work of assembling the drive mechanism and the switch mechanism inside the bracket is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrically foldable door mirror in which a switch mechanism can be easily assembled to a bracket.

<Means for solving the problem> The electrically foldable door mirror of the present invention includes a base fixed to the door, a fixed shaft erected on the base, and rotatably assembled to the fixed shaft. a bracket, a mirror housing attached to the bracket and covering the outside thereof, and a mirror adjustable and held in a front opening of the mirror housing;
Built into the bracket via a support plate,
a drive mechanism that rotates the bracket by driving a planetary gear that meshes with a fixed gear that is engaged with a fixed shaft;
It is equipped with a switch mechanism that detects the rotating position of the bracket by this drive mechanism, and this switch mechanism includes a printed circuit board equipped with a pattern terminal and supported on the bracket side, and a printed circuit board that is rotatably joined to the printed circuit board. The printed circuit board has a holder that is locked to a fixed shaft and has a terminal that contacts the pattern terminal, and the printed circuit board has a plurality of locking holes formed therein, into which regulating protrusions formed on the support plate are inserted. In addition, it is characterized in that it is clamped and fixed by this support plate and a pressing member screwed thereto.

《Operation》 By attaching the locking hole of the printed circuit board to the regulating protrusion of the support plate, the printed circuit board is positioned and held within the bracket, and by screwing the pressing member to the support plate, the printed circuit board can be held and switched. Secure the mechanism firmly.

<<Embodiment>> FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

This electrically foldable door mirror consists of a base 1 that is fixed to the door, and a shaft holder 2 that is attached to the base 1.
A fixed shaft 3 erected through the fixed shaft 3, a bracket 4 rotatably attached to the fixed shaft 3, and a pair of front and rear divided bodies 5 attached to the bracket 4.
It includes a mirror housing 5 consisting of a and 5b, a mirror body 7 attached to the bracket 4 via a tilting mechanism 6, a mirror 8 held by the mirror body 7, and a drive motor 9 built into the bracket 4. A drive mechanism and a switch mechanism 10 that detects the rotational position of the bracket 4 by this drive mechanism.
and a cover 11 attached to the front surface of the bracket 4 to cover the drive mechanism and the switch mechanism 10.

The base 1 is a vertical part 1 attached to the side of the door.
It has a horizontal part 1b projecting outward from the vertical part 1a, and is hollow inside, and as shown in FIG.
2 is inserted.

The shaft holder 2 is screwed and fixed to the horizontal portion 1b of the base 1, and a cord 12 is guided into the door mirror through the interior of a hollow fixed shaft 3. Further, the shaft holder 2 is formed with four recesses 14 in which three steel balls 13 mounted on the lower surface of the bracket 4 are selectively engaged. That is, when the bracket 4 is in a rotating position such as the mirror set position A, the rear storage position B, or the front storage position C, each steel ball 13 fits into each recess 14 and mechanically moves the bracket 4. It controls the position.

The tilting mechanism 6 is equipped with a set of motors inside, and as shown in FIG. By screwing a locking member 18 through a coil spring 17, the mirror body 7 is supported in a freely tiltable manner. The mirror 8 held by the mirror body 7 is adjusted and held at a desired angle by the operation of the tilting mechanism 6.

In addition, the bracket 4 has a cylindrical portion 19 formed in the center of the bottom into which the fixed shaft 3 is inserted, a storage portion 4a having an approximately semi-dome shape with an open front, and a frame to which the mirror housing 5 and the tilting mechanism 6 are attached. It has a support portion 4b having a shape. Storage part 4a
An arcuate notch corresponding to the cylindrical portion 19 is formed on the upper surface of the cylindrical portion 19 to allow the cord to pass through. Further, a groove 21 into which the upper edge of the cover 11 is inserted is formed extending from the upper part of the storage part 4a to the base end of the support part 4b.

On the other hand, the cover 11 covers the storage section 4 of the bracket 4.
It is formed in a semi-dome shape that is almost paired with the storage part 4a, and is installed from the front of the storage part 4a to seal it. A substantially semi-disc-shaped lid portion 22 is formed at the top of the cover 11 to close the upper surface opening 20 described above. This cover 11 is attached from the upper surface opening 20 of the bracket 4 to the groove 21 via a packing (not shown), and is attached to the housing part 4.
a.It is designed to ensure watertightness on the top surface. Further, a notch 23 for inserting the cord is formed in the lid 22, and a grommet 24 holding the cord 12 is attached to this notch 23, as shown in FIG. .

The drive mechanism is disposed on the outer side of the fixed shaft 3 in the vehicle width direction, and includes a drive motor 9 disposed within the storage portion 4a via the support plate 25, and a drive motor 9 disposed below the drive motor 9. It is configured with a reduction gear mechanism.

The support plate 25 is arranged horizontally and attached to the middle stage of the storage section 4a, and has a pair of mounting pieces 26 having insertion holes on both sides of the lower side. It is fixed in the storage part 4a by abutting from the front against a pair of boss parts 27 formed on both sides of the housing 4a and tightening the mounting screws 28 from the front. The support plate 25 is formed with a large diameter hole 29 through which the fixed shaft 3 is inserted, and a pair of pedestals 30 and 31 on the upper surface of which the switch mechanism 10 is attached.

Further, the drive motor 9 is attached to the upper surface of the support plate 25, and the first drive motor 9 is attached to the output shaft 9a of the support plate 25.
The worm gear 32 is disposed in the storage portion 4a in a state where it projects downward from the insertion hole of the support plate 25. Further, the tip of the output shaft 9a is inserted and locked into a receiving hole 33 formed at the bottom of the storage section 4a, so that the worm gear 32 can be firmly supported without being bent by the pressure applied in the radial direction. It's getting old.

In addition, the reduction gear mechanism, as shown in Fig. 3,
The first worm gear 32 mentioned above, the first worm wheel 34 that meshes with this, the second worm gear 35 that is integrally connected to this worm wheel 34, and the second worm wheel 36 that meshes with this, This worm wheel 36 has a planetary gear 37 made of a spur gear integrally connected to the worm wheel 36, and the planetary gear 37 is connected to the fixed gear 38 on the fixed shaft 3 side.
It meshes with the The first worm wheel 34 and the second worm gear 35 are supported by a support shaft 40 attached to a pair of support pieces 39 formed on the lower surface of the support plate 25 . In addition, the second worm wheel 36 and the planetary gear 3
7 is a support shaft 41 attached to the bottom surface of the storage section 4a.
It is pivotally supported with the planetary gear 37 facing down. In this reduction gear mechanism, worm gear 3
By using 2, 35 and worm wheels 34, 36, the speed can be efficiently reduced with a small number of gears, and it can be installed in a small space. In addition, as mentioned above, each gear 32, 34, 3
5, 36, 37 are the output shaft 9a and each support shaft 40,
41 and covered by the bracket 4 and cover 11, a dedicated gear case is not required, and the installation space can be reduced accordingly.

The fixed gear 38 is rotatably mounted on the cylindrical portion 19 of the bracket 4 described above, and is locked to the fixed shaft 3 via a clutch mechanism.

The clutch mechanism includes a clutch plate 42 fitted to the fixed shaft 3 and a coil spring 43 mounted on the outer periphery of the fixed shaft 3.
The clutch plate 42 is pressed against the fixed gear 38 by the spring force of the clutch pawl 4 formed on the fixed gear 38.
4 and a clutch groove 45 formed in the clutch plate 42 are engaged with each other. In other words, the clutch plate 42 has a fitting hole 42a formed in the center.
However, the different diameter portion 3 has a flat notch on both sides of the fixed shaft 3.
a, and this different diameter portion 3a
It is fitted in such a way that rotation is restricted. Further, the coil spring 43 is prevented from coming off by a push nut 46 mounted near the upper end of the fixed shaft 3, and presses the clutch plate 42 described above, and also presses the bracket 4 itself against the shaft holder 2, and presses the aforementioned steel ball. 13 is engaged with the recess 14. Further, a total of three clutch pawls 44 and three clutch grooves 45 are formed at 120° intervals in the circumferential direction of the fixed shaft 3. In such a clutch mechanism, the fixed gear 38 is fixed integrally with the clutch plate 42 by engaging the clutch pawl 44 and the clutch groove 45 by the coil spring 43. And fixed gear 3
When the load applied to gear 8 increases, the clutch pawl 44 and clutch groove 45 separate against the spring force of the coil spring 43, resulting in the clutch being disengaged and the fixed gear 38 spinning idly. Also,
In this clutch mechanism, an oil spring 43, a clutch plate 42, and a fixed gear 38 are arranged in order from the top, and the fixed gear 38 is arranged at the lowermost side inside the bracket 4. Therefore, fixed gear 38
A planetary gear 37 that meshes with the bracket 4 is also arranged at the lowermost side of the bracket 4, and together with this, the positions of the reduction gear mechanism and the drive motor 9 are set toward the bottom as a whole. With this, the storage section 4a of the bracket 4
The mirror housing 5 is also formed in a compact shape with a low height, so that the effective space within the mirror housing 5 can be increased.

The switch mechanism 10 also includes a pair of upper and lower insulating holders 47 and 48 that are locked to the upper end of the fixed shaft 3.
It has a structure in which a printed circuit board 49 attached to the above-mentioned support plate 25 is rotatably held between them. For example, the printed circuit board 49 has a fourth
As shown in the figure, a semi-circular pattern terminal 50 is provided in the rotation direction, and the holder 47 is provided with a pair of terminals 51 and 52 that contact the pattern terminal 50. and,
Due to the relative displacement between the holders 47 and 48 and the printed circuit board 50 as the bracket 4 rotates, one terminal 51 moves to one of the notches 50a, 50b, and 50c formed in the pattern terminal 50, and each Electricity is cut off between the terminals 51 and 52. Each notch 50
a, 50b, and 50c correspond to the three rotation angles of the mirror set position A, which is the normal use position of the door mirror, the rear storage position B when it is tilted backward, and the front storage position C when it is tilted forward. It is formed by Therefore, the switch mechanism 10 detects that the door mirror has rotated to a desired position by stopping the power supply to the terminals 51 and 52, and stops the operation of the drive motor 9.

This switch mechanism 10 locks the holders 47 and 48 to the different diameter portion 3b at the tip of the fixed shaft 3, and also attaches the printed circuit board 49 to the support plate 2 described above.
By fixing it to the pedestals 30 and 31 of No. 5, it is held at the upper part of the fixed shaft 3. That is, as shown in FIG. 1, a pair of locking holes 53 and 54 are formed in the printed circuit board 49.
As shown in FIG.
Regulating protrusions 55 and 56 formed at 0 and 31 are inserted. The printed circuit board 49 is thereby positioned. In addition, the pedestal parts 30, 3
1, the pedestal part 30 located on the opening side of the bracket 4 is formed with a boss part 30a that protrudes flush with the top surface of the mounted printed circuit board 49 and has a screw mounting hole. The pressing member 57 is screwed. That is, the pressing member 57 is screwed to the boss portion 30a at the proximal end, and has a locking hole 57a formed at the distal end extending toward the printed circuit board 49 so that the regulating protrusion 55 can be inserted. It's summery. Therefore,
By screwing and fixing the pressing member 57 to the boss portion 30a at the front position of the bracket 4, the printed circuit board 49 is held between the pedestals 30, 31 and the pressing member 57, and is attached to the fixed shaft 3 together with the holders 47, 48. It is designed to be held at the top. Particularly in this embodiment, since the pressing member 57 is locked at its distal end by the regulating protrusion 55, the boss portion 30
It can be firmly fixed by simply tightening the screws to a.
The work is extremely easy.

In the electrically foldable door mirror as described above, the bracket 4 incorporating the drive mechanism etc. can be configured to be extremely compact, so that the degree of freedom in designing the mirror housing 5 etc. can be increased. Therefore, as shown in FIG. 2, the base end portion of the mirror housing 5 located on the vehicle body side is shaped to have a larger notch than the upper part.
It is also possible to form a gap 58 between the base 1 and the base 1, thereby making it possible to prevent wind noise.

<<Effect of the invention>> As explained above, according to the invention, the printed circuit board is positioned and held within the bracket by fitting the locking hole of the printed circuit board to the regulating protrusion of the support plate, and the pressing member is attached to the support plate. Since the switch mechanism is fixed by clamping the printed circuit board by screwing it to the bracket, the switch mechanism can be easily and reliably assembled into a narrow bracket.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Fig. 2 is a partially omitted vertical sectional view showing the internal assembly structure of the same embodiment, Fig. 3 is a horizontal sectional view showing the gear arrangement of the drive mechanism provided in the same embodiment, and Fig. 4 is a partially omitted vertical sectional view showing the internal assembly structure of the same embodiment. FIG. 5 is a plan view showing the pattern terminals and terminals of the switch mechanism provided, and a horizontal sectional view showing the mounting structure of the switch mechanism in the same embodiment. 1... Base, 2... Shaft holder, 3...
Fixed shaft, 4...Bracket, 5...Mirror housing, 6...Tilt mechanism, 8...Mirror, 9...Drive motor, 9a...Output shaft, 10...Switch mechanism, 11...Cover, 25... ...Support plate, 2
6...Mounting piece, 28...Mounting screw, 32...
First worm gear, 34... First worm wheel, 35... Second worm gear, 36...
Second worm wheel, 37... Planetary gear, 3
8... Fixed gear, 40, 41... Support shaft, 42...
Clutch plate, 43...Coil spring, 44...
...Clutch pawl, 45...Clutch groove, 47, 48
...Holder, 49...Printed circuit board, 50...Pattern terminal, 51, 52...Terminal,
53, 54... Locking hole, 55, 56... Regulating protrusion, 57... Pressing member.

Claims (1)

[Scope of utility model registration request] A base fixed to a door, a fixed shaft erected on the base, a bracket rotatably attached to the fixed shaft, a mirror housing attached to the bracket and covering the outside thereof, and the mirror housing. The bracket is rotated by driving a mirror that is adjustable and held in the front opening of the bracket, and a planetary gear that is incorporated into the bracket via a support plate and meshed with a fixed gear that is locked to the fixed shaft. It is equipped with a drive mechanism and a switch mechanism that detects the rotating position of the bracket by the drive mechanism, and the switch mechanism includes a printed circuit board equipped with a pattern terminal and supported on the bracket side, and a printed circuit board that is rotatably connected to the printed circuit board. a holder having a terminal that is joined and locked to the fixed shaft and comes into contact with the pattern terminal, and the printed circuit board has a plurality of locking holes formed therein, and the support plate is inserted into these locking holes. An electrically foldable door mirror characterized in that a regulating protrusion formed on the support plate is inserted thereinto and is clamped and fixed by the support plate and a pressing member screwed onto the support plate.