JP5530755B2 - Vehicle seat headrest - Google Patents

Description

  The present invention relates to a headrest for a vehicle seat.

  Conventionally, a headrest that is supported by a stay at the upper part of the seat back so as to be pivotable in the front-rear direction is normally held in an upright position, and can be turned downward when the seat back is moved forward. There is a headrest of a certain vehicle seat (see Patent Document 1).

  In patent document 1, a headrest is hold | maintained in a standing position with a spring force, and it is a type which can be rotated downward against a spring force. In addition, a type has been proposed in which the headrest is held in an upright position with a friction force and can be rotated downward against the friction force.

  Such a headrest is employed to rotate the headrest to a downward position (refer to symbol D in FIG. 5) so that the headrest does not protrude forward when the seatback is folded forward and the seat is folded. Yes.

  The headrest is merely held in the upright position by spring force or friction, and normally there is no lock mechanism for locking in the upright position.

JP 2004-203347 A

  However, even when the headrest is not held in the standing position by the spring force or the friction force, such as when the vehicle is suddenly braked, even when trying to rotate to the forward position (see D ′ in FIG. 5), the standing position There was a request to hold it securely.

  The present invention has been made in order to meet the above-mentioned demands. The structure is simple and the number of parts is small, and the headrest can be securely held in the upright position even during sudden braking, and the head of the seated person can be safely protected. An object of the present invention is to provide a headrest for a vehicle seat.

In order to solve the above-described problems, the present invention includes a headrest that is supported by a stay at an upper portion of a seat back so as to be pivotable in the front-rear direction, and the headrest is normally held in an upright position by a spring force or a friction force. In the headrest of a vehicle seat that can be turned downward against the spring force or friction force when the seatback is moved forward, the fitting recess of the headrest frame of the headrest can be turned in the front-rear direction A stay having a support portion that is fitted to the headrest frame from above, and an upper portion that prevents the headrest frame from rotating upward beyond the standing position of the headrest frame by abutting the rear stopper recess of the headrest frame from above, and the headrest frame the center position offset from the fitting recess of, mounted for back-and-forth rotation operation on the shaft, engaging the front edge An operating lever which recess is formed, is attached to the bracket of the stay, it engages a locking recess of the operating lever in an upright position of the headrest frame, and a locking pin to prevent the downward rotation of the headrest frame And a headrest for a vehicle seat, wherein the headrest frame is allowed to turn downward when the locking recess is removed from the locking pin by a manual operation of the operating lever. is there.

  As in claim 2, in claim 1, a biasing member for biasing the operation lever is provided so that the locking recess of the operation lever is locked by the locking pin. it can.

As in claim 3, in claim 1 or 2, the headrest frame is attached with a U-shaped spring that sandwiches the support portion from both sides with spring force, and the headrest has the rear stopper recess. In a state of being in contact with the upper portion, it can be configured that the spring is always held in the standing position by the frictional force of the spring .

  According to the present invention, the headrest can be securely held in the standing position by locking the locking recess of the operation lever of the headrest frame with the locking pin of the stay that supports the headrest frame. Therefore, the head of the seated person can be safely protected even when the headrest is not held in the standing position by the spring force or the friction force, such as when the vehicle is suddenly braked.

  Further, since the operation lever is attached to the headrest frame and the locking pin is simply attached to the stay, the structure is simple and the number of parts is small, and it can be applied to an existing headrest.

  Furthermore, the headrest can be turned downward by simply removing the locking recess from the locking pin by a simple operation of manually operating the operation lever.

  According to claim 2, by urging the operating lever with the urging member, the locking recess of the operating lever can be reliably locked with the locking pin of the stay, and rattling of the operating lever is prevented. can do.

According to claim 3 , the headrest can be held in the upright position by the frictional force of the U-shaped spring.

It is a perspective view of the internal structure of the headrest of the embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. 1. It is a headrest frame, (a) is sectional drawing which shows a fitting recessed part and a rear stopper recessed part, (b) is sectional drawing which shows a wire spring. It is a side view which shows the operating state of an operation lever. It is a side view of a vehicle seat.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 5, the vehicle seat 1 includes a seat cushion 2 and a seat back 3, and the seat back 3 can be tilted forward and backward with respect to the seat cushion 2 by the reclining shaft 4, and the seat back 3 can be moved forward. (See the two-dot chain line).

  A headrest 5 supported by a stay 7 (described later) on the upper portion of the seat back 3 so as to be rotatable in the front-rear direction is provided. The headrest 5 is normally held at the standing position U (see the solid line) by the friction force, and can be rotated to the downward position D (see the two-dot chain line) against the friction force when the seat back 3 is moved forward. It has become. Note that a spring force may be employed instead of the friction force.

  As shown in FIGS. 1 and 2, both leg portions 7 a of an inverted U-shaped stay 7 are attached to the upper portion of the seat back 3 so that the vertical position can be adjusted. A hinge pipe (supporting portion) 7c that projects forward in a substantially parallel state with the upper portion 7b is integrally connected across both leg portions 7a below the upper portion 7b of the stay 7.

  The headrest 5 includes a headrest frame 8 made of synthetic resin. The headrest frame 8 has a square plate-like frame portion 8a that supports the head of the seated person in a side view, and a lower rear section of the square plate-like frame portion 8a is formed by an inverted U-shaped frame portion 8b. Yes.

  The headrest frame 8 is entirely covered with a skin (trim) in a state where the cushion pad is addressed (see a two-dot chain line in FIG. 3).

  In the front portion of the inverted U-shaped frame portion 8 b of the headrest frame 8, a fitting recess 8 c (see FIG. 3A) that fits from above into the hinge pipe 7 c of the stay 7 is formed. The fitting recess 8c is fitted to the hinge pipe 7c, whereby the headrest frame 8 is supported by the stay 7 so as to be rotatable in the front-rear direction.

Further, a rear stopper recess 8e (see FIG. 3A) is formed in the rear portion of the inverted U-shaped frame portion 8b so as to contact the upper portion 7b of the stay 7 from above. The stopper recess 8e comes into contact with the upper portion 7b, thereby preventing the headrest frame 8 from rotating backwardly beyond the standing position U.

  A U-shaped wire spring 15 is attached to the front portion of the inverted U-shaped frame portion 8b of the headrest frame 8, as shown in FIG. It has been. The headrest 5 is always held in the standing position U by the friction force (spring force) of the wire spring 15 and can be rotated to the downward position D when the seat back 3 is tilted forward.

  The wire spring 15 holds the fitting recess 8 c of the headrest frame 8 so as not to come off from the hinge pipe 7 c of the stay 7.

  Further, as shown in FIG. 1, relief recesses 8 d of both leg portions 7 a when rotating to the downward position D are formed at the lower end portion of the square plate frame portion 8 a of the headrest frame 8.

  At the rear of the inverted U-shaped frame portion 8b of the headrest frame 8, in the vicinity of the left end when viewed from the seated person, an operation lever 9 extending vertically is located at a position displaced from the center of the fitting recess 8c. Is attached to the shaft 10 so as to be able to rotate back and forth. A push nut 11 is fitted into the shaft 10 for preventing the operation lever 9 supported by the shaft 10 from coming off. The push nut 11 applies a light friction force to the operation lever 9 and holds it so that the operation lever 9 does not rotate freely.

  A locking recess 9 a is formed at the front edge of the operation lever 9, and a band 12 that can be manually operated by pulling is connected to the lower end of the operation lever 9.

  The bracket 16 of the left leg 7a of the stay 7 adjacent to the operation lever 9 is engaged with the engagement recess 9a of the operation lever 9 at the standing position U of the headrest frame 8, so that the headrest frame 8 faces forward (downward). ) Is attached. Then, when the locking recess 9a is removed from the locking pin 13 by manual operation of the operating lever 9 around the counter-clockwise direction (see the two-dot chain lines 9 ′ and 9 ″ in FIG. 4), the headrest frame 8 faces downward. Rotation is allowed.

  Further, a rectangular elastic rubber (attached) that biases the operation lever 9 is provided between the headrest frame 8 and the operation lever 9 so that the locking recess 9a of the operation lever 9 is locked by the locking pin 13. Force member) 14 is interposed. Instead of the elastic rubber 14, a metal coil spring or the like can be used.

  If configured as described above, as shown by the solid line in FIG. 4, the locking recess 9 a of the operation lever 9 of the headrest frame 8 is locked by the locking pin 13 of the stay 7 that supports the headrest frame 8. The headrest 5 can be reliably held at the standing position U. Therefore, the head of the seated person can be safely protected even when the headrest 5 is not held in the standing position U by the friction force, such as when the vehicle is suddenly braked.

  Then, when the band 12 is pulled and operated manually and the locking recess 9a is removed from the locking pin 13 by the rotation operation of the operation lever 9 around the counterclockwise direction, the headrest frame 8 is allowed to rotate downward. It becomes like this.

  In addition, since the operation lever 9 is attached to the headrest frame 8 and only the locking pin 13 is attached to the stay 7, the structure is simple and the number of parts is small, and it can be applied to the existing headrest 5.

  Furthermore, the headrest 5 can be rotated downward by simply removing the locking recess 9a from the locking pin 13 by a simple operation of manually operating the operation lever 9.

  Further, by urging the operation lever 9 with the urging member that is the elastic rubber 14, the engagement recess 9 a of the operation lever 9 can be reliably engaged with the engagement pin 13 of the stay 7. Shaking can be prevented.

  Furthermore, if the urging member is an elastic rubber 14, compared with a case where a metal coil spring is used, a stopper washer or the like is not necessary, and the cost is reduced.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 3 Seat back 5 Headrest 7 Stay 7c Hinge pipe (support part)
8 Headrest frame 8c Fitting recess 8d Rear stopper recess 9 Operation lever 9a Locking recess 10 Shaft 13 Locking pin 14 Elastic rubber (urging member)
U Standing position D Down position

Claims (3)

The headrest is provided with a headrest that is supported by a stay at the upper part of the seat back so as to be pivotable in the front-rear direction. The headrest is normally held in an upright position by a spring force or a friction force. In the headrest of the vehicle seat that can be turned to a downward position against the friction force,
The support portion in which the fitting recess of the headrest frame of the headrest is fitted from above so that the fitting recess of the headrest frame can rotate in the front-rear direction, and the rear stopper recess of the headrest frame abuts from above, so A stay having an upper portion for preventing rotation of the
An operation lever that is attached to a position deviated from the center of the fitting recess of the headrest frame so as to be able to rotate back and forth with a shaft, and a locking recess is formed on the front edge portion ;
A locking pin attached to the bracket of the stay , locking the locking recess of the operating lever at the standing position of the headrest frame, and preventing downward rotation of the headrest frame;
A headrest for a vehicle seat, wherein the headrest frame is allowed to turn downward when the locking recess is removed from the locking pin by manual operation of the operation lever.   The vehicle seat headrest according to claim 1, wherein a biasing member that biases the operation lever is provided so that the locking recess of the operation lever is locked by a locking pin. The headrest frame is attached with a U-shaped spring that sandwiches the support portion from both sides with spring force. The headrest is in a state in which the rear stopper recess is in contact with the upper portion, and by the frictional force of the spring. 3. The vehicle seat headrest according to claim 1 , wherein the headrest is held in a standing position at all times .

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