JPH0716454B2 - Reclining device - Google Patents

Description

The present invention relates to a reclining device for a vehicle seat.

[Prior Art] Fig. 11 shows the appearance of a reclining seat. The base bracket 2 is attached to the side surface of the seat cushion 1, and the arm bracket 4 is attached to the side surface of the seat back 3, and the arm bracket 4 is rotatably supported by the base bracket 2. A reclining mechanism (not shown) is provided between the base bracket 2 and the arm bracket 4, whereby the seat back 3 can be adjusted for reclining.

12 and 13 are a side view and a front view showing a conventional example of a reclining mechanism. A shaft body 5 is attached to the base bracket 2 of the seat cushion 2, and the arm bracket 4 of the seat back 3 is rotatably supported by the shaft body 5. 6 is a return spring that erects the seat back 3 from the reclining posture,
A spiral spring is used. This return spring 6
The inner end hook portion 6a of is inserted into the slit 5a of the shaft body 5,
The outer end hook portion 6b is hooked on a pin 7 provided on the arm bracket 4 and urges the seat back to rotate in the forward direction. In FIG. 12, 8 is a gear provided on the arm bracket 4, and 9 is a ratchet that meshes with the gear 8. This ratchet 9 is the base bracket 2
Is rotatably supported on the gear 8 by a spring 10
Is urged in the meshing direction with the gear 8 and ratchet 9
The reclining angle of the seat back is adjusted by meshing with. Reference numeral 11 denotes a knob, and a cam piece 12 is formed on the right end side of the knob, and the cam piece 12 is inserted into the recess 13 of the ratchet 9. In such a configuration, when the knob 11 is pulled up, the cam piece 12 rotates the ratchet 9 downward, so that the engagement between the ratchet 9 and the gear 8 is released, and the seatback 3 is rotated by the return spring 6 in the upright direction. It is designed to move.

However, in a two-door type vehicle such as a hard top type, it is necessary to tilt the seat back of the front seat forward when seating on the rear seat. For this reason,
In such a front seat of an automobile, a return spring 6 for urging the seat back in a forward direction is assembled, and when the ratchet 9 is released from the mesh with the gear 8 by operating the knob 11, the seat back is moved forward. It is designed to be folded over the cushion.

[Problems to be Solved by the Invention] When the seat back is rotated forward by the return spring as described above, the torque of the return spring is large, and the seat back is rapidly rotated during standing up and tilting forward. Therefore, the impact is severe and dangerous.

It is an object of the present invention to provide a reclining device capable of preventing such a rapid rotation of a seat back and tilting it forward.

[Means for Solving the Problems] In order to achieve the above object, a reclining device according to the present invention includes a fixed-side member attached to a shaft body that pivotally supports a seat back on a seat cushion, and a fixed-side member. It is characterized by comprising a rotating side member attached to the seat back so as to face the member, and a viscous grease filled in a facing portion of the rotating side member and the fixed side member.

[Operation] Since the reclining device according to the present invention is configured as described above, when the rotating-side member rotates, the viscous grease relaxes its rotational speed by the shearing force, and the seat back rotates at a slow speed. It is designed to move.

[Examples] Hereinafter, the present invention will be specifically described with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a side view of a mounted state, and FIG. 3 is an overall external view. The present invention is composed of a unit and can be directly applied to a conventional reclining seat. Therefore, the mechanism portion of the reclining seat is denoted by the same reference numeral as in the conventional example as shown in FIG. 2, and the duplicated description thereof is omitted. In this case, a non-circular recess 15 is formed on the end surface of the shaft body 5 which is the center of rotation of the seat back. For such a reclining seat, the reclining unit 20 of the present embodiment is
The stationary side member, the rotating side member, and the viscous grease interposed therebetween are configured.

The fixed-side member is attached to the shaft body 5 of the seat cushion, and as shown in FIGS. 1 and 3, the connecting plate 21 and the fin receiving plate 22 are assembled by screws 23 and fixed together. , Fin receiving plate 22
A large number of fixing fins 24 are attached to the. As shown in FIG. 4, FIG. 5 and FIG. 6, each of them has a disk-shaped outer shape. Connection plate 21
Is connected to the shaft body 5, and as shown in FIG. 4, an engagement protrusion 21a is formed on the side surface on the shaft body 5 side, and an engagement recess is formed on the side surface on the fin receiving plate 22 side. 21b is formed. The engagement protrusion 21 is shaped and dimensioned to be fitted into the non-circular recess 15 formed on the end surface of the shaft body 5. The attachment plate 21 is attached to the shaft body 5 so that the connection plate 21 is restrained from rotating. The rotation of the entire fixed-side member is restricted by. The engaging recess 21b is also formed in a non-circular shape like the recess 15 on the opposite side of the shaft body 5. On the other hand, as shown in FIG. 5, the fin receiving plate 22 has a non-circular engagement protrusion 22a formed on the side surface on the side of the connection plate 21 and fitted into the engagement recess 21b of the connection plate 21. Therefore, when the engagement protrusion 22a is fitted into the engagement recess 21b of the coupling plate 21 and is coupled with the screw 23, the coupling plate 21 and the fin receiving plate 22 are integrated with each other in a rotationally restrained state. As shown in FIG. 6, the fixed fin 24 has a non-circular mounting hole 24a formed in the center thereof, and the engaging protrusion 22a of the fin receiving plate 22 is inserted into the mounting hole 24a. This allows the fixed fins 2
Numeral 4 is integrated with the fin receiving plate 22 so that its rotation is restricted. In addition, a ring-shaped rib 24b that bulges to one side is formed around the mounting hole 24a to provide strength. As shown in FIG. 1, such fixed fins 24 are attached in a multi-layered manner with the fins 24 having appropriate intervals in a state where the ribs 24b are superposed.

Next, as shown in FIGS. 1 to 3, the rotation side member includes a lever plate 25 that is connected to the arm bracket 4 of the seat back with a screw 16, a cap plate 26 that covers the lever plate 25, and these. It is provided with a fin receiving plate 27 provided therebetween and a rotary fin 28 attached to the fin receiving plate 27. Lever plate
The reference numeral 25 extends downward from the connection portion with the arm bracket 4, and the side surface on the lower end side thereof is provided above the shaft body 5. The lever plate 25 has a seventh
As shown in the figure, a circular hole 25a is formed in a portion corresponding to the upper position of the shaft body 5, and the lever plate 25 is connected to the connecting plate 21 through the circular hole 25a when assembled as shown in FIG. It is rotatably inserted into the circular stepped portion 21c. Also,
In FIG. 7, the hole 25b formed around the circular hole 25a of the lever plate 25 is the lever plate 25 as shown in FIG.
It is a rivet hole for integrally assembling the cap plate 26 and the fin receiving plate 27 with the rivet 17. At the time of this assembly, the cap plate 26 is rotatably attached by inserting a circular hole 26a formed in the center thereof into the circular step portion 22b of the fin receiving plate 22. Therefore, the assembly structure of the lever plate 25, the cap plate 26, and the fin receiving plate 27 includes the fin receiving plate 22 and the circular step portions 22b of the connecting plate 21, respectively.
It can rotate around 21c. As shown in FIG. 9, the fin receiving plate 27 has a rectangular concave portion 27a on its inner surface.
It is shaped like a ring formed at regular intervals. As shown in FIG. 10, the rotary fin 28 has a ring shape with a hole 28c having a large diameter formed in the center, and a rib 28b is formed on the outer peripheral portion thereof. Also, the outside of the rib 28b is 90
Rectangular protrusions 28a are extended at intervals of two degrees.
By fitting 8a into the recess 27a of the fin receiving plate 27, it is integrated with the fin receiving plate 27. As shown in FIG. 1, the rotary fins 28 are assembled in a multi-layer structure with the ribs 28b superposed with the fins 28 having appropriate intervals. In this assembly, the fixed fins 24 and the rotary fins 28 are alternately superposed. That is, the fixed fins 24 and the rotary fins 28 are arranged to face each other, and the viscous grease 29 is filled in the gap between the facing portions.
Since the viscous grease 29 is interposed between the rotary fin 28 and the fixed fin 24, the shearing force of the viscous grease 29 acts when the rotary fin 28 rotates, and the rotational speed of the rotary fin 28 is reduced. ing.

Next, the operation will be described. The reclining unit 20 fits the engaging protrusion 21a of the connecting plate 21 that constitutes the stationary member into the recess 15 of the shaft body 5 on the seat cushion side, and
The lever plate 25 constituting the rotating member is fixed to the arm bracket 4 of the seat back with screws 16 (see FIG. 2). As a result, the reclining unit is attached, and when the reclining seatback is unlocked in this state, the seatback is rotated in the upright direction by the return spring 6. By this rotation, the rotation side member in which the lever plate 25 is connected to the seat back, that is, the cap plate 26, the rotation fin 28, and the fin receiving plate 27 of the rotation fin 28 are integrally formed around the connection plate 21 and the fin receiving plate 22. Rotate.
However, the viscous grease 29 is interposed between the rotary fins 28 and the fixed fins 24, and the rotational speed of the rotary fins 28 is reduced by the shearing force, so that the seat back stands up at a slow speed. Since the shearing force increases as the rotational speed of the seat back increases, rapid rotation of the seat back can be properly prevented, which improves safety.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, the rotary fins and the fixed fins may be formed in a polygonal shape without forming the disk shape, or slits may be formed in the fins.

[Advantages of the Invention] As described above, according to the present invention, since viscous grease is filled between the rotary member and the fixed member, the return spring of the seat back can be slowly rotated by the return spring.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the reclining device according to the embodiment of the present invention taken along the line AA of FIG. 3 (c), FIG. 2 is a side view of the mounted state, and FIGS. 3 (a), (b), ( c) is a left side view, front view, right side view of the reclining unit, FIGS. 4 (a) and 4 (b) are sectional views of the connecting plate, right side views, and FIGS. 5 (a) and 5 (b) are fixed. Sectional view and left side view of the fin receiving plate of the side member, FIGS. 6 (a) and 6 (b) are side views of the fixed fin and BB cross section, and FIG. 7 is a side view of the lever plate. Figure 8 is a side view of the cap plate,
9 (a) and 9 (b) are a side view and a sectional view taken along line C-C of the fin receiving plate of the rotating side member, and FIGS. 10 (a) and 10 (b).
Is a side view and a DD cross-sectional view of the rotary fin, FIG. 11 is an external perspective view of the reclining seat, and FIGS. 12 and 13 are a front view and a side view of a conventional example. 1 …… Seat cushion, 2 …… Seat back, 20 ……
Reclining unit, 21,22,23,24 …… Fixed side member, 25,26,27,28 …… Rotating side member, 29 …… Viscous grease.

Claims (1)

[Claims] 1. A fixed-side member attached to a shaft body that rotatably supports a seat back on a seat cushion, a rotary-side member attached to the seat back so as to face the fixed-side member, and a rotary member. A reclining device comprising: a viscous grease filled in a facing portion between the side member and the fixed side member.