JP3053354B2 - Seat reclining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlocking mechanism of left and right seat reclining devices in a seat device of an automobile or the like when the internal reclining seat reclining device has both ends.

[0002]

2. Description of the Related Art A seat reclining device is a seat device in which the inclination angle of a seat back can be set to a desired value within a predetermined range for the purpose of securing a safe driving posture of a driver and comfortable seating.

Conventionally, in this seat reclining device, an upper part is connected to an arm fixed to a seat back, and the upper part is rotatably mounted on a center shaft of a base plate fixed to a seat cushion. A lower tooth having a tooth meshing with a tooth formed on a circumference of an upper part centered on a center shaft is supported by a base plate, and a cam for rotating the lower tooth and an operation lever for rotating the cam are provided. Was pivotally supported by the base plate.

[0004] The interlocking mechanism of the left and right seat reclining devices fixes the lever by pivotally supporting the operation lever and projecting an integrally rotating shaft into the inside of the base plate.
A structure that transmits the rotation of the operation lever by engaging a link fixed to an end of a connecting pipe rotatably inserted into the center shaft with the lever, and a protrusion protrudingly provided on the operation lever pivotally supported by the center shaft. A structure is used in which a pin is projected from a long hole formed in the base plate to the inside of the base plate, and the pin is engaged with a link fixed to an end of the connecting pipe to transmit rotation of the operation lever.

Further, if the above-mentioned conventional seat reclining device is called an external gear system, there is a seat reclining device of an internal gear system. As an example of this internal tooth system, as shown in FIG. 7 , sectors 52, 53 centering on a center shaft 51 are formed on an arm 50 fixed to a seat back, and locking tooth portions 54, 5 are formed on the inner peripheral surface thereof.
5 are provided, and guide portions 57 and 58 are formed on a base plate 56 fixed to the seat cushion.
A lock plate 59 that slides 7 and 58 is provided on a base plate 56, and a pin 60 is protruded from the lock plate 59, and a control plate 62 having a cam hole 61 with which the pin 60 is engaged is rotated by an operation lever 63. As a result, the lock plates 59, 59 move in the radial direction so that the locking teeth 64, 65 can mesh with or release from the locking teeth 54, 55, and the control plate 62 has a lock plate. Pressing piece 66 abutting on 59
Is provided (Japanese Utility Model Publication No. 53-155)
No. 29).

[0006]

However, in a double-sided seat apparatus using the above-mentioned external-tooth-type seat reclining apparatus, a locking mechanism and an interlocking mechanism are provided on a base plate below an upper part. As the position of a certain center shaft increases, the base plate increases, and the size of the seat reclining device increases.

[0007] In addition, the above-mentioned internal-tooth-type seat reclining device has the same disadvantage as the external-tooth-type seat reclining device because the interlocking mechanism is provided on the base plate below the arm.

In view of the above circumstances, an object of the present invention is to provide a seat reclining device of an internal gear system provided with an interlocking mechanism for forming a double-sided seat device.

[0009]

A seat reclining device according to the present invention is fixed to a center shaft fixed to a base plate fixed to a vehicle body side to a seat back side.
The tooth plate to be fixed is rotatably supported , a fan-shaped concave portion having a predetermined radius centered on the center shaft is formed on the tooth plate, and a tooth portion is formed on an inner peripheral surface of an arc portion of the concave portion. A cam member for radially movably engaging a tooth member having a tooth portion engaging and disengaging with the tooth portion via a guide portion formed on the base plate, and for moving the tooth member. The cam member and the tooth member are pivotally supported on a shaft and arranged in a recess of a tooth plate,
Together arranged rotatably the cam member at the operating lever, the pin that collision set in the cam member is penetrated through the long holes of the base plate, the end of the connecting pipe of inserting the end of the pin to the center shaft By engaging the free end of the link fixed to the part, the rotation of the operation lever is transmitted to link the other seat reclining device.

[0010]

When the operation lever is turned upward, the cam member turns to release the meshing of the tooth member and the tooth portion of the tooth plate, and the pin protruding from the cam member is connected to the connecting pipe via the link. By rotating the connecting pipe via a center shaft which rotates integrally with the cam member, the reclining adjustment can be performed in conjunction with the other seat reclining device, and the desired seat back or tooth plate can be adjusted. When the operating lever is released after the inclination angle is set, the cam member rotates in the opposite direction, so that the tooth member moves in the radial direction via the guide portion, so that the tooth member of the tooth member and the tooth portion of the tooth plate mesh. To lock the set tilt angle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, a tooth plate 3 is rotatably mounted on a base plate 1 fixed to a vehicle body via a seat slide device (not shown) via a center shaft 2. Hole 4 for connection in tooth plate 3
The arm 5 is connected to the arm 5 via an arm, and the arm 5 is fixed to a side surface of a seat back (not shown). Note that the tooth plate 3 may be directly fixed to the side surface of the seat back without the intervention of the arm 5.

On the inner surface side of the tooth plate 3, a fan-shaped concave portion 6 having a predetermined radius centering on the center shaft 2 is formed by embossing or the like toward the connection hole 4 side. The teeth 7 are formed on the peripheral wall in a normal way. A pressing member 9 connected to the upper end of the tooth plate 3 by a pin 8 inserted into the connecting hole 4 slidably contacts the peripheral portion of the base plate 1 and presses the tooth portion 7 so as not to peel off from the base plate 1. I have.

That is, an arc portion 1a having a predetermined radius centered on the center shaft 2 is formed on the base plate 1, and the pressing member 9 is formed with an arc step portion 9a which is in sliding contact with the arc portion 1a within a predetermined range. Shape. The pin 8 passes through the connection hole 4, the connection hole 5 a of the arm 5, and the connection hole 9 b of the holding member 9, and fastens them together. The holding member 9 may be a member in which a pin whose head is expanded is inserted into the connection holes 4, 5 a, 9 b so that the head comes into sliding contact with the peripheral edge of the base plate 1.

A tooth member 11 having an upper edge formed with a tooth portion 10 meshing with the tooth portion 7 is housed in a concave portion 1b formed in the base plate 1 so as to be slidable on one surface of the base plate 1, and the tooth member 10 and the base plate 1 are toothed. A guide portion 12 comprising a convex portion or a concave portion which is sandwiched between the plates 3 and is accommodated in the concave portion 6 of the tooth plate 3 and has a guide surface which guides the base plate 1 to slide in the radial direction with the tooth member 11 interposed therebetween. , 13 are formed. The tooth member 11 has side portions 14, 14 parallel to the guide portions 12, 13 and arm portions 15 projecting obliquely in a direction crossing the side portions 14, 14.

Cam member 19 for sliding tooth member 11
Are housed in the recess 6 and the recess 1b of the base plate 1 so as to be rotatable about the center shaft 2 while being sandwiched between the base plate 1 and the tooth plate 3. The cam member 19 has a head portion 20 abutting on the side of the tooth member 11 opposing the tooth portion 10,
And an arm 21 for sliding the tooth member 11 to release the meshing of the teeth 7 and 10 by contacting the teeth.

The center shaft 2 has a flange portion 22 and is inserted through the tooth plate 3, penetrates the cam member 19, the operation lever 23 and the base plate 1, and engages with the base plate 1 at the irregularly shaped cross section 24 so that it cannot rotate. And the outside thereof is caulked and fixed to the base plate 1, and a connecting pipe 25 is fitted to the outermost end.

An inner end of a spiral spring 27 is locked to the other end of the center shaft 2, and an outer end of the spiral spring 27 is engaged with a pin 28 projecting from the tooth plate 3 and projecting outward. It has stopped. Therefore, the tooth plate 3 is always urged to rotate forward.

A link 29 is fixed to an end of the connecting pipe 25 by welding or the like, and a hole 30 is formed in the end of the link. In the hole 30, a pin 31 protruding from the cam member 19 is provided.
Are engaged through the long holes 32 of the base plate 1. Thus, the rotation of the cam member 19 is linked with the other seat reclining device (not shown) via the link 29 and the connecting pipe 25, thereby forming an internal-tooth-type double-sided seat reclining device.

The link 29 may be formed integrally with the connecting pipe 25, as shown in FIGS. 4 (A) and 4 (B).
Both ends of the pipe 25a are crushed and flattened, and the flattened ends are bent at 90 degrees in the same direction to form a portion 29a to replace the link 29. The original hole 25b of the pipe and the pin are formed in the portion 29a. By forming the holes 29b through which the holes 31 are inserted, the number of parts can be omitted. Further, as shown in FIG. 4B, instead of providing the hole 29b through which the pin 31 is inserted, a notch groove 29c may be provided to engage with the pin 31.

The operation lever 23 is disposed between the cam member 19 and the base plate 1 through the center shaft 2 and is fitted in a concave portion 1b formed in the base plate 1, and is embossed near the center shaft 2. A portion 33 is formed, and a hole 34 into which the embossed portion 33 is fitted is formed and fitted in the cam member 19, so that the operation lever 23 and the cam member 19 can rotate integrally.

A knob 35 is mounted on the free end of the operation lever 23. The operation lever 23 includes a return spring 3.
6 is locked, and the other end of the return spring 36 is locked to a pin 37 protruding from the base plate 1.

Next, the operation of the above embodiment will be described. When the operation lever 23 is rotated clockwise about the center shaft 2 against the force of the return spring 36, as shown in FIG. Both rotate clockwise, the head 20 comes off the lower surface of the tooth member 11, and
The arm part 21 contacts the arm part 15 and the tooth member 11
Is displaced toward the center shaft 2 to release the meshing of the teeth. At this time, the rotation of the cam member 19 causes the link 29 and the connecting pipe 25 to rotate via the pin 31 protruding from the cam member 19, and the other seat reclining device is interlocked to release the lock. Here, since the embossed portion 33 of the operation lever 23 is directly fitted into the hole 34 of the cam member 19, the rotation of the operation lever 23 is reliably transmitted to the link 29 and the connection pipe 25, and the other seat reclining. The devices can be linked reliably.

Therefore, the tooth plate 3 is rotated in the forward tilting direction by the force of the spiral spring 27 (shown in phantom line 3).
a). Then, when the seat back is pushed rearward to determine its inclination angle and the operation lever 23 is released, the return spring 3
With the force of 6, the operation lever 23 returns to the original position, the cam member 19 rotates counterclockwise, and the arm portion 21 separates from the arm portion 15 of the tooth member 11, and
The head 20 of the cam member 19 abuts against the lower side of the tooth member 11, whereby the teeth 10, 7 mesh with each other, and the locking state shown in FIG. 2 is established. The link pipe 25 is rotated by the link 29 rotating about the center shaft 2 via the cam member 19 which rotates together with the operation lever 23, and the other seat reclining device is interlocked.

In the first embodiment, the operation lever 23
6 is sandwiched between the base plate 1 and the tooth plate 3. As shown in FIG. 6 as a second embodiment, the operation lever 23 is formed outside the tooth plate 3 on the tooth plate 3 and the center shaft 2. 22. In this case, a pin 31a projecting from both sides is implanted in the cam member 19, and a long hole 32 through which the pin 31a penetrates is formed in the base plate 1, and a long hole 32a is formed in the tooth plate 3, respectively. 2
3 is a hole 23 engaging with the pin 31 protruding from the long hole 32a.
a. Therefore, the base plate 1
It is not necessary to provide the recess 1b with which the operation lever 23 engages. The other configuration is the same as that of the first embodiment, and the description is omitted.

[0025]

[0026]

[0027]

[0028]

[0029]

As a result, a small-sized double-sided seat reclining device having a simple structure can be obtained, and the position of the center shaft 2, which is a hinge center, can be lowered in the seat reclining device. It is also suitable as a double-sided seat reclining device for a seat device in a sports car or the like that needs to be set at a low height.

[0031]

According to the present invention described above, since the lock mechanism and the interlocking mechanism are provided in the vicinity of the center shaft and within the range of the tooth plate, the lock mechanism and the interlocking mechanism can be reduced in size and the tooth can be reduced. Since there is no need to provide a mechanism below the plate, the size of the base plate can be reduced. Also, left and right seat reclining devices
Since the slot formed for interlocking can be made smaller,
Degree and prevent foreign matter from entering through the long hole.
Wear. This has a simple structure and a small interlocking mechanism.
The seat reclining device can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is an assembled front view of FIG. 1;

FIG. 3 is a sectional side view of FIG. 2;

FIG. 4 is an end perspective view of a connecting pipe.

FIG. 5 is an explanatory diagram of an operation.

FIG. 6 is an exploded perspective view showing a second embodiment.

FIG. 7 is a front view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base plate 2 ... Center shaft 3 ... Tooth plate 5 ... Arm 6 ... Concave part 7, 10 ... Tooth part 11 ... Tooth member 12, 13 ... Guide part 15, 21 ... Arm part 19 ... Cam member 23 ... Operation lever 25 ... Connection Pipe 29 ... Link 33 ... Embossed part 34 ... Hole 36 ... Return spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A47C 1/00-1/16 B60N 2/00-2/52

Claims (3)

(57) [Claims] 1. A solid base plate that is fixed to the vehicle body
Is fixed to the seat back side boss was center shaft
The tooth plate is rotatably supported , a fan-shaped concave portion having a predetermined radius centered on the center shaft is formed on the tooth plate , and a tooth portion is formed on an inner peripheral surface of an arc portion of the concave portion,
A tooth member having a tooth portion engaged with and disengaged from the tooth portion is movably engaged in a radial direction via a guide portion formed on the base plate, and a cam member for moving the tooth member is pivotally supported on a center shaft. and it was arranged the tooth member and the cam member in the recess of the tooth plate, with arranged rotatably the cam member at the operating lever, the base plate a pin which is collision set in the cam member It is passed through the long hole, to transmit the rotation of the operation lever by engaging the free end of the link which is fixed to the end of the connecting pipe to insert the end portion of the pin to the center shaft and the other seat reclining apparatus Seat reclining device characterized by interlocking. 2. An operation lever inserted into a center shaft is disposed between a cam member and a base plate, and a concave portion rotatable by fitting the operation lever is formed in the base plate. claim 1 Symbol mounting seat reclining apparatus. Wherein the operating lever which is inserted through the center shaft, two-outside of the scan plates, and characterized by comprising disposed between the flange portion formed in the tooth plate and the center shaft according to claim 1 Symbol placement Seat reclining device.