JP2005138754A - Headrest supporting structure of vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple supporting structure for supporting a headrest of a vehicle seat capable of avoiding a backward movement due to play of the headrest. <P>SOLUTION: Peripheral faces of headrest stays 8, 8 inserted in tubular headrest supports 9, 9 in headrest support brackets 6, 6 are pressed toward a rear side of a seat back 2 by a lock member 10, so that a headrest 3 is mounted to the seat back 2 under a condition for avoiding the backward movement due to play. As a result, when a head of an occupant moves backward into contact with the headrest 3, such as when a vehicle collides, the backward movement of the headrest 3 is avoided so as to instantaneously restrain the head of the occupant. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a support structure for a headrest that is mounted on an upper portion of a seat back of a vehicle seat so as to be adjustable in height.

  In general, a headrest for protecting a passenger's head in the event of a rear-end collision of the vehicle is mounted on the upper part of the seat back of the vehicle seat. Here, the headrest attached to the seat back of the driver's seat or the passenger seat is usually attached so as to be adjustable in height via a pair of left and right headrest stays.

  In this type of headrest, a pair of left and right headrest stays protruding from the lower portion are inserted into a pair of left and right cylindrical support portions provided on an upper portion of a seatback frame embedded in the seatback. Then, the peripheral surface of the headrest stay is sandwiched by the lock member attached to the cylindrical support portion, so that the headrest is supported to be adjustable in height with respect to the support portion.

For example, as described in Patent Document 1, the headrest stay 32 of the headrest 30 is inserted into a pair of left and right cylindrical headrest supports 14 provided on the upper part of the outer frame portion 12 of the seat back frame. The headrest 30 is supported by the headrest support 14 so that the height can be adjusted by sandwiching the peripheral surface of the headrest stay 32 with a lock clip 16 attached to the headrest support 14 as a lock member.
JP 2003-70588 A (paragraph 0010, paragraph 0013, paragraph 0014, FIG. 1, FIG. 5, FIG. 8)

  By the way, in the conventional headrest support structure, in order to facilitate the insertion of the headrest stay into the cylindrical support portion, a slight gap is usually provided between the cylindrical support portion and the headrest stay. For this reason, the headrest may rattle in the front-rear direction with respect to the seat back. In this case, when the head of the occupant moves backward and comes into contact with the headrest, such as when the vehicle undergoes a rear-end collision, the headrest moves backward together with the occupant's head by the amount of backlash in the front-rear direction. The passenger's head may tilt backward.

  Therefore, an object of the present invention is to provide a headrest support structure for a vehicle seat that can prevent backward movement due to backlash of the headrest while having a simple structure.

  A headrest support structure for a vehicle seat according to the present invention is a headrest support structure that is mounted on an upper portion of a seatback of a vehicle seat via a headrest stay so as to be adjustable in height, and is a seat embedded in a seatback The back frame includes a cylindrical support portion through which the headrest stay is inserted, and a lock member that holds the inserted headrest stay at a predetermined height is attached to the support portion. The peripheral surface of the headrest stay inserted through is pressed against the back of the seat back.

  In the headrest support structure for a vehicle seat according to the present invention, since the peripheral surface of the headrest stay inserted through the cylindrical support portion is pressed toward the rear of the seat back by the lock member, the headrest moves backward due to backlash. It is attached to the seat back in a state in which it is blocked.

  According to the headrest support structure for a vehicle seat according to the present invention, the headrest can be attached to the seat back in a state in which the backward movement due to rattling is prevented. When the part moves backward and comes into contact with the headrest, the headrest of the occupant can be restrained immediately by preventing the headrest from moving backward. Therefore, according to the present invention, the original function of protecting the head and neck of the occupant with the headrest can be sufficiently exhibited.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a headrest support structure for a vehicle seat according to the present invention will be described with reference to the drawings. 1 is a perspective view schematically showing a headrest support structure according to an embodiment of the present invention, FIG. 2 is a front view of a headrest support bracket shown in FIG. 1, and FIG. 3 is a headrest shown in FIG. It is a top view of a support.

  A headrest support structure for a vehicle seat according to an embodiment is a support structure for a headrest 3 mounted on an upper portion of a seatback 2 of a vehicle seat including a seat cushion 1 and a seatback 2 as shown in FIG. .

  A seat back frame 4 (only the upper structure is illustrated) serving as a skeleton is embedded in the seat back 2. The upper part of the seat back frame 4 is composed of an upper pipe 5 that is bent in a portal shape when viewed from the front. A pair of left and right headrest support brackets 6 and 6 are welded to the front surface of the horizontal pipe portion 5A extending in the left-right direction of the upper pipe 5.

  On the other hand, a headrest plate 7 serving as a skeleton is embedded in the headrest 3. A pair of left and right headrest stays 8, 8 are assembled to the headrest plate 7 so as to protrude from the lower portion of the headrest 3. The headrest stays 8 and 8 are composed of left and right vertical pipe portions of a pipe material bent in a portal shape when viewed from the front.

  The seat back frame 4, the upper pipe 5, and the headrest support brackets 6 and 6 in the seat back 2 are covered with a seat back pad (not shown) made of a cushion material such as urethane foam. Similarly, the headrest plate 7 and the headrest stays 8 and 8 in the headrest 3 are covered with a headrest pad (not shown) made of a cushion material such as urethane foam.

  The headrest support brackets 6 and 6 are cylindrical members whose outer peripheral surfaces are formed in a quadrangular prism shape, and a flat crushing portion 5B (see FIG. 2). The headrest support brackets 6, 6 incorporate cylindrical headrest supports 9, 9 made of synthetic resin that support the headrest stays 8, 8 through the support.

  As shown in FIG. 2, the headrest support 9 has a guide tube portion 9A fitted and fixed in the headrest support bracket 6, and an upper end portion of the headrest support bracket 6 continuously to the upper portion of the guide tube portion 9A. The covering head portion 9B is integrally formed. The head portion 9B is disposed facing the upper surface of the seat back 2, and a stay insertion hole 9C through which the headrest stay 8 is inserted is opened on the upper surface of the head portion 9B (see FIG. 3).

  The stay insertion hole 9C of the headrest support 9 is formed continuously with the inner periphery of the guide tube portion 9A. The inner diameter of the stay insertion hole 9C is such that the headrest stay 8 can be easily inserted. It is set to be slightly larger than the external dimensions of.

  Here, as shown in FIG. 3, the head portion 9B of the headrest support 9 is provided with a lock member 10 for holding the headrest stay 8 (see FIG. 2) inserted through the stay insertion hole 9C at a predetermined height. Has been. This lock member 10 is formed by integrally forming a lock release button 10B made of synthetic resin at one end of a lock plate 10A made of sheet metal.

  The lock release button 10B of the lock member 10 is fitted into an opening 9D formed on the side surface of the head portion 9B so as to be pushed and pushed out. Further, the lock plate 10A is accommodated in an accommodation space (not shown) formed inside the head portion 9B continuously to the opening 9D so as to be movable in the push-push direction of the lock release button 10B.

  At the other end of the lock plate 10A opposite to the lock release button 10B, a pair of spring receivers 10C that abut against a pair of leaf springs 9E, 9E provided in the head portion 9B and are pressed toward the opening 9D. , 10C, and an engagement piece 10D that engages with a locking portion 9F that is formed between the pair of leaf springs 9E, 9E in the head portion 9B and is prevented from being removed. An insertion window 10E through which the headrest stay 8 (see FIG. 2) is inserted is opened at the center of the lock plate 10A.

  The locking member 10 shown in FIGS. 2 and 3 is attached to the right headrest support 9 of the pair of left and right headrest supports 9, 9 shown in FIG. The lock member 10 has an opening 9D of the headrest support 9 that is opened on the right side surface of the head portion 9B when viewed from the front of the seat back 2 (see FIG. 1). It protrudes to the right side from the head portion 9B, and is movable in the left-right direction in this state. Although not shown, the lock member 10 attached to the left headrest support 9 when viewed from the front of the seat back 2 is configured symmetrically with the lock member 10 shown in FIGS. 2 and 3.

  Here, as shown in FIG. 3, the lock plate 10A is pressed against the opening 9D by a pair of leaf springs 9E and 9E in the insertion window 10E opened in the lock plate 10A of the lock member 10. A pressing side 10F that protrudes into the insertion hole 9C is formed. The pressing side 10F is inclined so as to approach the other end side of the lock plate 10A from the front side in the front-rear direction of the seat back 2 toward the rear side.

  As shown in FIG. 4, when the headrest stay 8 is inserted into the stay insertion hole 9C, the pressing side 10F moves the peripheral surface of the headrest stay 8 toward the opening 9D by the pressing force of the pair of leaf springs 9E and 9E. By pressing, the headrest stay 8 is pressed toward the rear side of the seat back 2 by the component force.

  In the vehicle seat headrest support structure of the embodiment configured as described above, as shown in FIG. 2, a stay insertion hole 9 </ b> C opening in the upper surface of the head portion 9 </ b> B of the headrest support 9 enters the guide tube portion 9 </ b> A. By inserting the headrest stay, the headrest 3 is mounted on the upper portion of the seat back 2 as shown in FIG.

  In such a mounted state of the headrest 3, as shown in FIG. 4, the lock plate 10A of the lock member 10 is pressed toward the opening 9D by the pair of leaf springs 9E and 9E in the head portion 9B of the headrest support 9. As a result, the pressing side 10F of the insertion window 10E opened in the lock plate 10A approaches the stay insertion hole 9C. The headrest stay 8 is sandwiched between the pressing side 10F and the wall surface of the stay insertion hole 9C, so that the headrest 3 is mounted so that its height can be adjusted.

  Here, as shown in FIG. 4, the pressing side 10 </ b> F of the lock member 10 that protrudes into the stay insertion hole 9 </ b> C presses the circumferential surface of the headrest stay 8 toward the opening 9 </ b> D, and the component force causes the headrest stay 8. Is pushed toward the rear side of the seat back 2. For this reason, the headrest 3 is mounted on the upper part of the seat back 2 in a state in which backward movement due to rattling is prevented (see FIG. 5).

  Here, as shown in FIG. 6, when the head of the occupant M moves backward and comes into contact with the headrest 3, such as when the vehicle undergoes a rear-end collision, the headrest 3 that is prevented from moving backward due to rattling is Immediately restrain the head of the occupant M. And this headrest 3 protects the passenger | crew's M neck reliably by reducing the back movement amount of the passenger | crew's M head.

  That is, according to the headrest support structure for a vehicle seat according to an embodiment, the headrest 3 can be restrained immediately by preventing the headrest 3 from moving backward, and the headrest 3 can immediately restrain the head of the occupant M. The original function of protecting the head and neck can be fully exhibited.

  The headrest support structure for a vehicle seat according to the present invention is not limited to one embodiment. For example, the inclination angle of the pressing side 10F of the lock member 10 shown in FIG. 3 is not limited to the illustrated example, and can be changed as appropriate.

  Further, the locations of the spring receivers 10C, 10C and the engagement pieces 10D formed on the lock plate 10A of the lock member 10 can be changed as appropriate, and are provided in the head portion 9B of the headrest support 9 correspondingly. The location of the leaf springs 9E, 9E and the locking portion 9F can be changed as appropriate.

  Further, the plate springs 9E and 9E in the head portion 9B can be changed to a coil spring or a string spring.

It is a perspective view showing the outline of the headrest support structure concerning one embodiment of the present invention. It is a front view of the headrest support bracket shown in FIG. It is a top view of the headrest support shown in FIG. It is a top view of the headrest support explaining the effect | action of the locking member shown in FIG. FIG. 2 is a side view showing the posture of the occupant seated on the vehicle seat shown in FIG. 1 during normal operation. It is a side view which shows the attitude | position change at the time of the vehicle of the passenger | crew who seated on the vehicle seat shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat back 3 Headrest 4 Seat back frame 5 Upper pipe 6 Headrest support bracket 7 Headrest plate 8 Headrest stay 9 Headrest support 9A Guide cylinder part 9B Head part 9C Stay insertion hole 9D Opening 9E Leaf spring 9F Locking part 10 Lock Member 10A Lock plate 10B Unlock button 10C Spring receiver 10D Engagement piece 10E Insertion window 10F Press side

Claims (1)

A headrest support structure that is mounted on an upper part of a seat back of a vehicle seat via a headrest stay so as to be adjustable in height,
The seat back frame embedded in the seat back includes a cylindrical support portion through which the headrest stay is inserted, and a lock member for holding the inserted headrest stay at a predetermined height is attached to the support portion. And
The headrest support structure for a vehicle seat, wherein the lock member is configured to press a circumferential surface of a headrest stay inserted through the support portion toward the rear of the seat back.

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