JP2019001310A - Seat back biasing mechanism of reclining device - Google Patents

Abstract

To provide a seat back biasing mechanism of a reclining device which can change arrangement of a spring used in the seat back biasing mechanism of a reclining device to effectively utilize a space located at the outer side of a seat cushion bracket.SOLUTION: A seat back biasing mechanism of a reclining device of a vehicle seat includes: a seat back bracket 10; a seat cushion bracket 30; a round unit 50 disposed between the seat back bracket and the seat cushion bracket; and a power spring type spring 70 which is provided in an area located between the seat back bracket and the seat cushion bracket and at the outer periphery side of the round unit. One end part of the spring is directly or indirectly attached to the seat back bracket, and the other end part is directly or indirectly attached to the seat cushion bracket.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seat back urging mechanism for a reclining device.

  As a reclining device having an urging mechanism for tilting the seat back of the reclining device, first and second outer cylinders as engagement protrusions at positions away from the tilt center of the upper arm of the first hook plate fixed to the upper arm. A first inner cylinder piece is provided as a first spring hook that is provided with a piece and on which an inner end of a spring that urges the upper arm forwardly is hooked. On the other hand, the second hook plate fixed to the lower arm includes a stopper that abuts against the first and second outer cylinder pieces and restricts the tilt of the upper arm, and a second spring hook on which the outer end of the spring is hooked. Have been proposed (Patent Document 1).

  However, the spring used for the urging mechanism of the reclining device including the reclining device described in Patent Document 1 is usually arranged outside the bracket on the seat cushion side. Originally, the space outside the bracket on the seat cushion side is a very limited space, but it is necessary to secure a space to place this spring, which greatly limits the degree of freedom in designing the vehicle seat. There was a problem that had been.

JP 2001-292850 A

  The present invention has been made in view of such a problem, and is a reclining device capable of effectively utilizing the space outside the seat cushion bracket by changing the arrangement of springs used in the seat back urging mechanism of the reclining device. An object is to provide a seat back urging mechanism.

  The present invention adopts the following means in order to achieve at least one of the above-mentioned main objects.

The seat back urging mechanism of the vehicle seat reclining device according to the present invention is:
A seat back bracket;
Seat cushion bracket,
A round unit disposed between the seat back bracket and the seat cushion bracket;
A mainspring spring between the seatback bracket and the seat cushion bracket and provided on the outer peripheral side of the round unit,
One end of the spring is directly or indirectly attached to the seat back bracket, and the other end is attached directly or indirectly to the seat cushion bracket.

  According to the seat back urging mechanism of the reclining device according to the present invention, the urging spring used for reducing the operating force of the forward tilting of the seat back or the tilting operation of the seat back is the seat back bracket and the seat cushion bracket. And provided on the outer peripheral side of the round unit. For this reason, since the spring does not protrude from the region outside the seat cushion bracket, a free space can be provided in this region. Therefore, a free design can be made in this space.

  Further, in the seat back urging mechanism of the reclining device according to the present invention, the spring is made of a wire having a width narrower than a distance between the seat back bracket and the seat cushion bracket. May be.

  By using a spring that uses a wire rod that is narrower than the distance between the seat back bracket and the seat cushion bracket, the spring can be disposed between the seat back bracket and the seat cushion bracket.

  Furthermore, the seat back urging mechanism of the reclining device according to the present invention may include a movement preventing piece that prevents the spring from moving to the round unit side.

  By providing the movement preventing piece, the possibility that the spring abuts on the round unit can be reduced.

FIG. 1 is a side view of a vehicle seat 200 in which a seat back urging mechanism of the reclining device 100 according to the present embodiment is incorporated. FIG. 2 is a side view showing an outline of the seatback urging mechanism of the reclining device 100 according to the present embodiment. FIG. 3 is a rear view of the seat back urging mechanism of the reclining device 100 according to the present embodiment. FIG. 4 is a side view showing another embodiment of the seat back urging mechanism of the reclining device 100 according to the present embodiment. FIG. 5 is a rear view showing another embodiment of the seat back urging mechanism of the reclining device 100 according to the present embodiment.

  Next, an embodiment of a seat back urging mechanism of the reclining device 100 according to the present invention will be described with reference to the drawings. The embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and do not depart from the gist of the present invention. The range can be changed as appropriate.

  The seat back urging mechanism of the reclining device 100 according to the present invention is a seat back urging mechanism for assisting or reducing the operation force of the seat back forward tilting or tilting operation of the seat back in the vehicle seat reclining device. The present invention relates to a mechanism, and particularly relates to the arrangement of a spring that imparts an urging function. The seat back urging mechanism of the reclining device 100 according to the present invention is mainly provided on the seat back bracket 10 provided on the seat back 210 of the vehicle seat 200 and the seat cushion 230, as shown in FIGS. The seat cushion bracket 30, the round unit 50 disposed therebetween, and the spring 70 attached to the seat back bracket 10 and the seat cushion bracket 30 and biasing the seat back 210 are provided.

  The seat back bracket 10 is a member that is directly or indirectly fixed to the seat back 210 of the vehicle, and the overall form of the seat back bracket 10 is not particularly limited, and is adapted to the form of the seat back 210. Therefore, a suitable form can be selected as appropriate.

  The seat cushion bracket 30 is a member that is directly or indirectly fixed to the seat cushion 230 of the vehicle, and the overall form of the seat cushion 230 is not particularly limited, depending on the form of the seat cushion 230. A suitable form can be selected as appropriate.

  Between the seat back bracket 10 and the seat cushion bracket 30, a device for adjusting the angle of the seat back 210, generally called a round unit or a reclining unit (hereinafter referred to as "round unit 50"), is disposed. Yes. The round unit 50 is a member for adjusting each state of the seat back 210 such as a locked state, an unlocked state, or a free state. The round unit 50 is not particularly limited, and an existing round unit 50 can be used. The round unit 50 includes a base plate and a gear plate that can be rotated relative to each other so as to be switched between a locked state and an unlocked state. The base plate of the round unit 50 is fixed to the seat back bracket 10, and the gear plate is fixed to the seat cushion bracket 30, so that the seat back bracket 10 can rotate around the round unit 50 with respect to the seat cushion bracket 30. become. Note that the round unit 50 can be switched between a locked state and an unlocked state by the operation lever 80.

  The spring 70 is a member that biases the seat back bracket 10 and has a mainspring type configuration. The urging force of the spring 70 automatically moves the seat back 210 forward when the round unit 50 is unlocked or free, or assists the operation force of the tilting operation of the seat back 210. Or reduce. In the present invention, the spring 70 is disposed between the seat back bracket 10 and the seat cushion bracket 30. Since the round unit 50 is disposed between the seat back bracket 10 and the seat cushion bracket 30, a gap is formed between the seat back bracket 10 and the seat cushion bracket 30. The spring 70 is disposed in this gap. Specifically, since the round unit 50 is disposed at the rotation center between the seat back bracket 10 and the seat cushion bracket 30, the spring 70 is disposed on the outer peripheral side of the round unit 50 in a spiral shape. At this time, in the state where the most energy is stored in the mainspring spring, that is, in the state where the mainspring spring is most contracted, the round unit 50 is also arranged with a gap so as not to contact the round unit 50. . That is, the inner diameter of the spring has a diameter larger than the diameter of the round unit 50 and is wound around the outer periphery of the round unit 50 with a gap. The spring 70 is formed of a spring 70 made of a wire or a plate material having a narrower width than the distance between the seat back bracket 10 and the seat cushion bracket 30 so that the spring 70 can freely move between the seat back bracket 10 and the seat cushion bracket 30. use. The number of turns and the cross-sectional shape of the mainspring of the spring 70 are not particularly limited, and can be appropriately selected according to the necessary spring tension. The inner peripheral end 72 or the outer peripheral end 74 of the spring 70 is directly or indirectly attached to the seat back bracket 10 or the seat cushion bracket 30, respectively. Conversely, the inner peripheral end 72 or the outer peripheral end 74 of the spring 70 may be directly or indirectly attached to the seat cushion bracket 30 or the seat back bracket 10, respectively.

  For example, as shown in FIG. 2, the seat cushion bracket 30 is manufactured so that the end surface is formed in the vicinity of the round unit 50 as a method of attaching the inner peripheral end 72 and the outer peripheral end 74 of the spring 70. An inner peripheral side locking piece 42 formed by bending the end surface on the spring 70 side is formed so as to be arranged within 5 mm or more and 3 cm from the outer peripheral surface of the round unit 50, and this inner peripheral side locking piece 42 is formed. The inner peripheral side end 72 of the spring 70 may be locked. On the other hand, the outer peripheral side end 74 has a bracket 15 having an outer peripheral side locking piece 43 for locking the outer peripheral side end 74 attached to the seat back bracket 10. The outer peripheral side end 74 of the 70 is locked. Moreover, in this embodiment, as shown in FIG. 2, the movement prevention piece 35 is provided so that the spring 70 may not move to a round unit 50 side more than a fixed amount. Thereby, possibility that the spring 70 will contact | abut to the round unit 50 can be reduced.

  Further, as shown in FIG. 4 or FIG. 5, the inner peripheral side locking piece 42 is locked to the end surface on the seat back bracket 10 side, and the inner peripheral side end 72 of the spring 70 is locked. 30, a hook may be formed as the outer peripheral side locking piece 43, and the outer peripheral side end 74 may be locked to the hook.

  As described above, one of the inner peripheral end 72 and the outer peripheral end 74 is fixed to the seat back bracket 10, and any remaining one is fixed directly or indirectly to the seat cushion bracket 30. . The fixing method is not particularly limited, and can be appropriately selected according to the design. For example, the ends may be completely welded and fixed.

  As described above, the seat back urging mechanism of the reclining device 100 according to the present invention is provided on the outer side surface of the seat cushion bracket 30 as compared with the forward tilting mechanism of the conventional reclining device arranged outside the seat cushion bracket 30. A free space can be provided. This makes it possible to arrange other components in such a space. In addition, it is possible to increase the width of the vehicle seat 200 using this space. That is, since the horizontal frame of the vehicle seat 200 and the like can be expanded by this space, a wider vehicle seat 200 can be used. Therefore, the vehicle seat 200 can be made more comfortable. Furthermore, the pipe width which comprises the vehicle seat 200 can be expanded, and the more robust vehicle seat 200 can be produced. Furthermore, in order to maintain the design of the vehicle seat 200, the forward reclining mechanism of the conventional reclining device 100 is provided with a large and thick cover to conceal the protruding spring. Since it does not have, a thin cover can be used.

  Further, by adopting such a configuration, the round unit 50 having the function of locking and unlocking the seat back 210 and the spring 70 are arranged on the same plane. Therefore, unlike the conventional case, the distortion that occurs when the spring 70 and the round unit 50 are on different planes does not occur. Therefore, the seat back urging mechanism of the reclining device 100 that reacts more quickly can be provided.

  As shown in the above-described embodiment, it can be used as a reclining device for a vehicle seat.

DESCRIPTION OF SYMBOLS 10 ... Seat back bracket, 15 ... Bracket, 30 ... Seat cushion bracket, 35 ... Movement prevention piece, 42 ... Inner peripheral side locking piece, 43 ... Outer peripheral side locking piece, 50 ... Round unit, 70 ... Spring, 72 ... Inner peripheral end, 74 ... outer peripheral end, 80 ... operating lever, 100 ... reclining device, 200 ... vehicle seat, 210 ... seat back, 230 ... seat cushion

Claims (3)

In the seat back urging mechanism of the vehicle seat reclining device,
A seat back bracket;
Seat cushion bracket,
A round unit disposed between the seat back bracket and the seat cushion bracket;
A spring of a spring type provided between the seatback bracket and the seat cushion bracket and provided on the outer peripheral side of the round unit,
One end portion of the spring is directly or indirectly attached to the seat back bracket, and the other end portion is directly or indirectly attached to the seat cushion bracket. The seat back urging mechanism of the reclining device.   2. The seat back urging mechanism of the reclining device according to claim 1, wherein the spring is made of a wire having a width smaller than a distance between the seat back bracket and the seat cushion bracket. The seat back urging mechanism of the reclining device according to claim 1, further comprising a movement preventing piece that prevents the spring from moving toward the round unit.

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