JPH0352447Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a reclining device in which the tilting position of a seat back relative to a seat cushion can be adjusted by skillfully utilizing a planetary gear mechanism.

[Conventional technology]

For example, in vehicle seats, it is common practice to provide a reclining device between a seat cushion and a seat back so that the seat back can tilt relative to the seat cushion.

By the way, what is required of this type of reclining device is that it has a simple configuration, is excellent in terms of workability and assemblability of each part, can reduce backlash and the number of parts, and is not only inexpensive in terms of cost. The seat back can be tilted freely and adjusted at an appropriate angle, and the adjustment operation is extremely easy, and the locked state can be reliably maintained against the load of the seated person. be.
Conventionally, various configurations have been proposed.

For example, as shown in FIG. 4 and FIG.
is formed, and internal toothed portions 4 with different numbers of teeth are formed in this circular hole.
a, 5a are formed, and a plurality of planetary gears 6 mesh with the internal teeth 4a, 5a, and the plurality of planetary gears 6.
The plurality of planetary gears 6 are arranged so that their positions are regulated by a stabilizer 8.

Therefore, when the rotating shaft 9 connected to the operating knob or the output shaft of the motor is rotated to rotate the control gear 7, the planetary gear 6 rotates and revolves, and the arm plate 3 can be rotated and adjusted steplessly. is possible.

[Problem that the invention attempts to solve]

However, in such a conventional reclining device 1, the orbit of the planetary gear 6 is restricted only by the stabilizer 8, but the clearance between the stabilizer 8 and the planetary gear 6 directly causes play. Furthermore, the presence of the stabilizer 8 forces the plate thickness of the control gear 7 to become thinner.
There was a risk that the problem of insufficient strength of the control gear 7 would occur when generating power using a motor.

The purpose of the present invention is to reduce the occurrence of backlash and eliminate the use of stabilizers, which is excellent in economy, and to increase the plate thickness of the control gear by eliminating the stabilizer. To provide a reclining device that can improve the strength of gears and can easily be powered.

[Means for solving problems]

The present invention was made in view of the above-mentioned problems, and consists of a base plate on the seat cushion side and an arm plate on the seat back side, which are rotatably supported on the same axis and have internal teeth in opposing circular holes. , a plurality of planetary gears that mesh with the internal teeth of each of these plates, and a control gear that meshes with these planetary gears and is provided on the rotation shaft of both the plates, and a control gear that meshes with the planetary gears and is provided on the rotation axis of both the plates, A pin is formed to protrude, a groove is formed in at least one of the base plate or the arm plate along the orbit of the planetary gear, and the pin of the planetary gear is fitted into the groove. Features.

[Effect]

According to the present invention, since the pins formed at the axial center positions of the plurality of planetary gears are fitted into the grooves of the base plate or the arm plate, the plurality of planetary gears can be held without using a stabilizer. In order to maintain a predetermined orbital position, there is little play, allowing smooth rotational operation, fewer parts, and a simpler configuration.Furthermore, the thickness of the control gear can be increased to increase power. It is possible to obtain a reclining device that can be adapted to various situations.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIGS. 1 and 2 show an embodiment of the reclining device according to the present invention. In these figures, the reclining device, generally designated by the reference numeral 10, includes a seat cushion and a seat back (both of which constitute a seat). Base plate 1 as a pair of plates each attached to a base plate (not shown)
1 and an arm plate 12. The base plate 11 and the arm plate 12 are located on the same axis (on the shaft support of the seat).
Internal toothed portions 13 and 14 are formed in circular holes facing each other, and in this embodiment, these internal toothed portions 13 and 14 have the same tip circle but different numbers of teeth. It is formed.

Reference numeral 15 designates a plurality of (four in this embodiment) planetary gears that mesh with the internal toothed portions 13 and 14, respectively, and a pin 16 is formed protruding from the axis of each of these planetary gears 15. In this embodiment, a case will be described in which the pin 16 is used, but a shaft member or other protrusion may also be used. Further, the pin 16 is not limited to being provided on both sides of the planetary gear 15, and may be provided only on one side.

Concave grooves 21 and 22 into which the pin 16 of the planetary gear 15 fits are formed in the base plate 11 and arm plate 12, respectively. The grooves 21 and 22 are formed along the orbit of the planetary gear 15, and in this embodiment, the grooves 21 and 22 are formed in both the base plate 11 and the arm plate 12.
22 is shown in the figure, the pin 16 of the planetary gear 15 only needs to be formed on one of the plates. Note that the grooves 21 and 22 are formed on the outside of the protrusions 21a and 22a that protrude in directions facing each other.

Further, a control gear 20 is pivotally supported by a rotating shaft 23 on the same axis as the internal gears 13 and 14 on the plate side so as to mesh with the planetary gear 15. This rotating shaft 23 is connected to an operating knob or an output shaft of a motor.

According to the above-mentioned configuration, when the rotating shaft 23 connected to the operating knob or the like is rotated and the control gear 20 is rotated in a desired direction by the rotating shaft 23, each planetary gear 15 is thereby rotated. The relative angle of the arm plate 12 to the base plate 11 can be freely and steplessly adjusted by the internal teeth 14 on the arm plate 12 side that mesh with this.

At this time, the pin 16 of each planetary gear 15 moves along the grooves 21 and 22 formed in the base plate 11 and arm plate 12, and each planetary gear 15
will stop while rotating. Furthermore, when the rotation of the control gear 20 is stopped, the arm plate 12 is engaged with the internal tooth section 13 on the base plate 11 side through the internal tooth section 14 thereof and the tooth section 17 of the planetary gear 15, and thereby is locked in the meshing position. It is something that

FIG. 3 shows a different embodiment of the reclining device according to the present invention, in which the base plate 11 and the arm plate 12 are
The shapes of the grooves 21 and 22 formed in the second embodiment are different, and the other configurations are similar to those of the embodiment described above.

That is, the grooves 21 and 22 in this embodiment are formed so that their cross-sections match the cross-sectional shape of the pin 16, thereby further ensuring the support of the pin 16.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part may be modified and changed as necessary. For example, the number of teeth and the size of the tip circle of each tooth portion 13, 14, 17, 20 in the embodiment described above, the number of planetary gears 15, etc. are selected as necessary, and the internal tooth portion 13 and 14 have the same number of teeth, the addendum circles are formed differently, and the planetary gear 15 is formed with a step, and these stepped tooth portions are configured to mesh with the internal tooth portions 13 and 14. You can also do that.

Furthermore, the reclining device according to the present invention,
Although the present invention can be effectively applied to vehicle seats, it is of course not limited thereto.

[Effect of idea]

The above is the configuration of an embodiment of the reclining device according to the present invention. According to this configuration, a groove along the orbit of the planetary gear is formed in at least one of the base plate or the arm plate, and the groove is formed in at least one of the base plate or the arm plate. Since the pin protruding from the planetary gear is fitted into the groove, there is no need to use a stabilizer to support the planetary gear and regulate its position, and the occurrence of backlash can be reduced. Since there is no stabilizer, the plate thickness of the control gear can be formed to be approximately the same as the plate thickness of the planetary gear, the strength of the control gear can be improved, and a reclining device that can be easily powered can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic exploded perspective view showing one embodiment of the reclining device according to the present invention, FIG. 2 is a sectional view of the main part thereof, FIG. 3 is a sectional view of the main part showing a different embodiment of the invention, and FIG. FIG. 5 is an exploded perspective view and a partially sectional view of a conventional reclining device. In the figure, 10... Reclining device, 11... Base plate, 12... Arm plate, 13, 14
...Internal gear, 15...Planetary gear, 16...Pin, 17...
Tooth portion, 20... Control gear, 21, 22... Concave groove, 23
…Axis of rotation.

Claims (1)

[Scope of utility model registration request] A base plate on the seat cushion side and an arm plate on the seat back side, which are coaxially supported so as to be rotatable with each other and have internal teeth in their opposing circular holes, and a plurality of planets that mesh with the internal teeth of each of these plates. gears, and a control gear meshing with these planetary gears and provided on the rotating shafts of the two plates, a pin protruding from the axis of each of the planetary gears, and at least one of the base plate and the arm plate. A reclining device characterized in that a concave groove is formed along the orbit of the planetary gear, and a pin of the planetary gear is fitted into the concave groove.