JP2019077240A - Seat back for chair and vehicle seat - Google Patents

Abstract

[Problem] To provide a seat back for a chair that reliably holds the back by minimizing deformation of the frame itself that is the base of the seat back, and that can change in response to the turning motion only when it is desired to change when turning backward. [Solution] The seat back for a chair 100 according to the present invention is characterized by comprising a support part 10 attached to the seat directly or via a reclining mechanism 91, a side seat back 40 formed so as to be rotatable directly or indirectly with respect to the support part 10, and a biasing member 60 that biases the side seat back 40 forward. [Selected Figure] Figure 1

Description

  The present invention relates to a seat back for a chair and a vehicle seat.

As a chair capable of reliably supporting the back of a seated person and being able to follow the posture when the posture is such that it is turned backward from one side in the width direction, the legs and the legs A back support supported by the body, a back support member supported by the back support, and a back support supported by the back support member and supporting the back of the seater ,
The backrest receives the back of the seat occupant and is attached to a flexible upholstery material having flexibility that can be displaced according to the backrest, the upholstery material and a lower end connected to the backrest support member. There has been proposed one having a pair of vertical frame portions separated in the width direction which can be torsionally deformed according to the force acting from the back of the seated person (Patent Document 1).

  However, in the case of such a chair, the backing material used for backrest must be largely torsionally deformable, and the support of the back by the seat back feels fluffy, and the shape is fixed with a firm fit. There was a problem that it was not possible to make the seat back of the mold.

  In particular, when used as a vehicle seat, it is necessary to hold the back securely. For this reason, there is a problem that the seat back itself can not be easily used to be greatly distorted.

  Further, as in driving, even if a very large force is applied to the backrest, it may not be displaced, but there is a problem that it can not cope with such a case.

JP 2014-79511 A

  Therefore, it is an object of the present invention to provide a chair seat back that can be changed according to the turning operation only when the back is firmly held and turned backward and it is desired to change it.

  The present invention adopts the following means in order to achieve the above-mentioned object.

The seat back for a chair according to the present invention is
A support attached to the seat directly or via a reclining mechanism;
A side seat back rotatably formed directly or indirectly with respect to the support portion;
An urging member for urging the side seat back forward;
It is characterized by having.

  According to the present invention, the side seat backs disposed on either or both of the left and right are formed rotatably with respect to the support portion, so that only the side seat back can be rotationally moved rearward. Therefore, when the turning operation is performed, the side seat back moves in the turning direction, so the abdomen and shoulders themselves also move in the turning direction as compared to the chair to which the seat back is fixed. Can be turned around, because it can be

Further, in the seat back for a chair according to the present invention,
The side seat back may be formed on both sides of the support portion.

  By adopting such a configuration, it is possible to make a large turn when turning in either left or right direction.

Furthermore, in the seat back for a chair according to the present invention,
The rotary shaft portions of the respective side seat backs formed on both sides of the support portion may be characterized in that all have the same axis.

  Since the rotation mechanism can be concentrated at one place by setting the rotation shafts of the left and right seat backs as the same axis, the side seat backs on both the left and right sides can be made movable with space saving.

Furthermore, in the seat back for a chair according to the present invention,
The side seat back may be characterized by including a stop mechanism so as not to rotate forward or backward beyond a predetermined position.

  By adopting such a configuration, the side seat back can be always returned to the same position when the force on the side seat back is released. In addition, even when a force is applied to the side seat back too much when turned around, it is possible to prevent the side seat back from rotating too much backward.

  Furthermore, in the seat back for a chair according to the present invention, the rotary shaft portion of the side seat back may be provided with a lock mechanism that can be fixed at a predetermined angle.

  By adopting such a configuration, since the side seat back can be fixed at a predetermined fixed angle, it is easy to adjust to any angle, and the side seat back can be made convenient.

  Furthermore, the seat back for a chair according to the present invention may be characterized by comprising a manual or electric operation means for releasing the lock mechanism.

  By adopting such a configuration, the side seat back can be arbitrarily fixed or moved, which makes it easier to use.

  Furthermore, in the seat back for a chair according to the present invention, an actuator capable of controlling the movement of the side seat back may be provided.

  By adopting such a configuration, when moving the side seat back, it is not necessary to move the side seat back manually, so it is possible to provide a chair seat back that is easier to use.

  Furthermore, the present invention provides a vehicle seat using the above-described chair seat back. According to the vehicle seat according to the present invention, since it is possible to turn backward widely, for example, when a person sitting in the front seat wants to talk with a person sitting in the rear seat or wants to take luggage of the rear seat It is effective in the case etc.

FIG. 1 is a perspective view showing a vehicle seat 200 having a chair seat back 100 according to the embodiment. FIG. 2 is a perspective view showing the back side of the chair seat back 100 according to the embodiment. FIG. 3 is a perspective view showing the rotation shaft of the auxiliary frame 35 of the chair seat back 100 according to the embodiment. FIG. 4 is a top view showing a rotation state of the right side seat back 20 of the chair seat back 100 according to the embodiment. Drawing 5 is a figure showing the modification of the energizing member attached to seat back 100 for chairs concerning an embodiment. FIG. 6 is a view showing a modification of the rotation shaft portion 50 of the chair seat back 100 according to the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that 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. Further, in the respective drawings, corresponding components are denoted by the same or similar reference numerals. In the embodiment of the present invention, a chair seat back 100 applied to a vehicle seat 200 will be described as an example, but the chair seat back 100 according to the present invention is limited to the vehicle seat 200 It is also applicable to electric wheelchairs and ordinary chairs, which are included in the scope of the invention.

  The seatback 100 for a chair according to the present embodiment is, as shown in FIG. 1, a support portion 10 disposed at the center of the vehicle seat 200, a right side seatback 20 disposed on the right at the time of seating, and the time of seating. A side seat back 40 composed of a left side seat back 30 disposed on the left side, a rotary shaft 50 (see FIG. 2) rotatably supporting the left and right side seat backs 40, and these side seat backs 40 It mainly includes a biasing member 60 for biasing the left and right side end portions of the left and right sides, and a round unit 70 (see FIG. 3) having a stop mechanism and a lock mechanism.

  The support portion 10 is attached to the seat cushion frame 90 via a reclining mechanism 91. Therefore, although the support part 10 rotationally moves only in the front-back direction by the reclining mechanism 91, it does not move in the left-right direction. The support portion 10 is disposed at the center of the chair seat back 100. In addition, in this embodiment, although it produces so that it may become a substantially reverse U-shape by a pipe, it is not limited to this. Since the support portion 10 functions as a base of rotation of the side seat back 40, it directly or via a reclining mechanism or the like with respect to the seat portion (the seat cushion frame 90 in the case of a vehicle seat) It may be attached indirectly and formed so as not to move in the lateral direction.

  The side seat back 40 has a right side seat back 20 disposed on the right side at the time of sitting and a left seat back 30 disposed on the left side at the time of seating, and the outer shapes of the right and left sides of the chair seat back 100 It is formed in a substantially U-shape by a pipe so as to be easily formed. Each of the right side seat back 20 and the left side seat back 30 has a rotary shaft portion 50 on the back side of the support portion 10 as shown in FIG. 2, and as shown by the arrows in FIG. It is rotatably supported to draw. The rotating shaft portion 50 is formed on the upper side and the lower side of the seatback 100 for a chair, at or near the end on the central side of the substantially U-shaped frame. In the present embodiment, the rotation shaft portion 50 a of the right side seat back 20 and the rotation shaft portion 50 b of the left side seat back 30 are formed on the same axis. Further, in the present embodiment, the auxiliary frame 35 is further formed between the substantially U-shape, and the rotation shaft portion 50a and the rotation shaft portion 50b are also formed in the vicinity of the upper and lower centers of the seatback 100 for a chair. There is. By providing the auxiliary frame 35 in this manner, the rigidity of the entire frame is increased, and the deflection of the frame can be suppressed. A plurality of auxiliary frames 35 may be provided.

  As shown in FIG. 2, the rotary shaft portion 50 has a fixed bracket 11 fixed to the support portion 10, and a movable bracket 12 rotatably provided relative to the fixed bracket 11. The end portions of the right side seat back 20, the left side seat back 30 and the auxiliary frame 35 are fixed to the movable bracket 12. That is, when the movable bracket 12 rotates with respect to the fixed bracket 11, the right side seat back 20 and the left side seat back 30 rotate. Preferably, as shown in FIG. 3, any rotary shaft portion 50 may be provided with a round unit 70 similar to that provided on a vehicle seat reclining device. The round unit 70 is a mechanism that can be locked and stopped at a predetermined angle by the operation means 80. By providing the round unit 70 in this manner, it is possible to set the maximum rotation angle to the front side and the maximum rotation angle to the rear side of the right side seat back 20 and the left side seat back 30, and have a function as a stopper. In addition, it becomes possible to lock at any preset angle. For example, it can be set so as to be able to be fixed stepwise every 5 ° in the order of 5 °, 10 ° ... 45 °. The round unit 70 is not particularly limited, and various known units can be selected and used.

  The biasing member 60 is a means for biasing the end portions of the right side seat back 20 and the left side seat back 30 in the direction to rotate forward. As the biasing member 60, as shown in FIG. 1, when arranged on the front side from the rotation center, a tension spring 61 biased in a contracting direction is used. In the present embodiment, although the type in which the metal wire is folded back in a wave shape is used as the tension spring 61, it is of course not limited thereto, and a coil-shaped tension spring may be used. Further, when the biasing member 60 is disposed on the rear side of the rotary shaft portion 50, as shown in FIG. 5, a compression spring 62 biased in a spreading direction may be used. Alternatively, a rotary spring or a torque device (not shown) may be attached to the rotary shaft 50 itself to bias the right side seat back 20 and the left side seat back 30 forward. In short, the means is not particularly limited as long as it is means for biasing the right side seat back 20 and the left side seat back 30 to the front side. Further, the number, strength, and the like of the biasing members 60 are not particularly limited, and can be selected appropriately according to use. By providing the biasing member 60 in this manner, in the normal state (the state where no force is applied), the right side seat back 20 and the left side seat back 30 are most forwardly positioned, making it easy to hold the back.

  The chair seat back 100 configured in this way can be used as a vehicle seat 200 with a backrest cushion and a cushion cover attached. In a normal state, the vehicle seat 200 is locked by the round unit 70 so that the right side seat back 20 and the left side seat back 30 do not move carelessly. Therefore, even if a force is applied to the side seat back 40 so as to push it back during driving or the like, the side seat back 40 does not move, so that the operation can be performed with ease. Even in the case of turning to the rear from this state, the side seat back 40 does not move when the operation means 80 is not operated. When it is desired to make a large turn, the operation means 80 is operated to release the lock mechanism of the round unit 70. In this state, for example, when the right side seat back 20 is unlocked when it turns to the right, by performing an operation to face the back, the abdomen and shoulders of the person sitting against the right side seat back 20 Since a force is applied to push the back side, as shown in FIG. 4B, the right side seat back 20 is rotationally moved to the rear side centering on the rotation shaft 50. This makes it possible to turn around widely with the abdomen and shoulders. At this time, if it is desired to maintain this state, the round unit 70 is locked by releasing the operation means 80, and the right side seat back 20 maintains the state of FIG. 4B rotating backward, There is no need to push the right side seat back 20 backward with the shoulders or abdomen. When it is desired to return to the original position, the unlocking of the round unit 70 by the operation means 80 causes the biasing member 60 to return to the initial position, that is, the state where the right seat back 20 is at the foremost side. become. When it is desired to turn to the left side, the left seat back 30 is rotationally moved to the rear side by the same operation.

  As described above, according to the chair seat back 100 according to the present invention, the side seat back 40 can be largely turned by the rotational movement rearward when it is desired to turn largely backward. This makes it easier to talk to the person in the back seat. In addition, when picking up luggage in the rear seat or taking care of a child in the rear seat, the work can be performed without removing the seat belt. On the other hand, when the user does not want to move the side seat back 40, the vehicle does not rotate unless the operation means 80 is operated, so the vehicle can be driven with confidence.

  In the embodiment described above, the rotary shaft portion 50a on the right side and the rotary shaft portion 50b on the left side are present on the same axis, but the present invention is not limited to this, and as shown in FIG. It may be the axis of

  In the embodiment described above, the right and left seat backs 20 and 30 rotate on the left and right sides, but only one of the right and left seat backs 20 and 30 can be rotated. Good. For example, when it is used for a vehicle seat of a car, it is generally less likely to turn to the door side when turning around and is often turned to the center side, so only one having many directions of turning may be rotatable .

  Furthermore, in the embodiment, although the right side seat back 20 and the left side seat back 30 are formed in a frame shape by a pipe, it is not limited to this, and may be formed in a plate shape.

  Furthermore, in the above-described embodiment, the round unit 70 is manually released by the operation means 80 to release the round unit 70. However, the tablet or smartphone may be operated to be unlocked by a signal, voice recognition, an image The turning direction may be detected by recognition and released.

  Furthermore, in the embodiment described above, although the pressing force of the body when turning around is used to move the right side seat back 20 and the left side seat back 30 is used, electricity is controlled by a switch or the like using an actuator that can be controlled as a torque device. It may be movable.

  The present invention is not limited to the embodiment described above, and may be implemented in various modes within the technical scope of the present invention.

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

  DESCRIPTION OF SYMBOLS 10 ... Supporting part, 11 ... Fixed bracket, 12 ... Movable bracket, 20 ... Right side seat back, 30 ... Left side seat back, 35 ... Auxiliary frame, 40 ... Side seat back, 50 ... Rotation axis part, 50a ... Rotation axis part , 50b: rotation shaft portion, 60: biasing member, 70: round unit, 90: seat cushion frame, 91: reclining mechanism, 100: chair seat back, 200: vehicle seat

Claims (8)

A support attached to the seat directly or via a reclining mechanism;
A side seat back rotatably formed directly or indirectly with respect to the support portion;
An urging member for urging the side seat back forward;
A seat back for a chair characterized by comprising.   The chair seat back according to claim 1, wherein the side seat back is formed on both sides of the support portion.   The seat back for a chair according to claim 2, wherein rotary shafts of the side seat backs formed on both sides of the support portion are all coaxial.   The chair seat back according to any one of claims 1 to 3, wherein the side seat back is provided with a stop mechanism so as not to rotate forward or backward at a predetermined position or more. .   The seat back according to any one of claims 1 to 4, wherein the rotation shaft portion of the side seat back is provided with a lock mechanism capable of fixing a position at a predetermined angle.   The chair seat back according to claim 5, further comprising a manual or electric operation means for releasing the lock mechanism.   The chair seat back according to any one of claims 1 to 6, further comprising an actuator capable of controlling the movement of the side seat back. A vehicle seat comprising the chair seat back according to any one of claims 1 to 7.

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