JPH0646551U - Headrest support - Google Patents

Abstract

(57) [Abstract] [Purpose] Aim to reduce costs by reducing the number of parts and improving assembly. [Structure] The headrest support 4 includes a support body 10 into which a stay 7 of the headrest is inserted, a lock plate 15 slidably mounted on a head 11 of the body 10 with a predetermined movement amount, and a lock plate 1
5, a spring 8 for urging the lock plate 5 in the pull-out direction, and an engaging portion 22 formed on the lock plate 15 and engaged with the positioning groove 7a of the stay 7 by the urging force of the spring 8. The head 11 of the support body 10 is provided with a guide wall 25 for slidingly guiding the lock plate 15, and as the spring 8, one spring adjacent to one side of the lock plate 15 is arranged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a headrest support that is provided in a seat back of an automobile seat and that supports a stay of a headrest by inserting it.

[0002]

[Prior art]

 An example of a conventional headrest support will be described with reference to FIGS. FIG. 3 shows the headrest support structure in an exploded perspective view. Guide pipes 3 made of right and left square pipes attached to the frame 2 of the seat back 1, headrest supports 4 inserted into the respective guide pipes 3, and provided on the headrests 6 and slidable on the respective headrest supports 4. The left and right stays 7 to be inserted are provided. The left and right stays 7 are connected to each other inside the headrest 6.

Of the two headrest supports 4, for example, the right headrest support 4 has a built-in locking mechanism for positioning the height of the headrest 6. The right headrest support is shown diagrammatically in FIG. In FIG. 4, (a) is a plan view, (b) is a side view, (c) is a sectional view taken along line BB of (b), and (d) is a sectional view taken along line CC of (b). 3 and 4, the left and right headrest supports 4 are made of synthetic resin, and have a head 11 at the upper end of a cylindrical support body 10 and an insertion hole into which the stay 7 of the headrest 6 can be inserted. 9 has a substantially cylindrical shape.

At the lower end of each headrest support 4, a bifurcated retainer piece 5 is formed that engages with the end surface of the pipe with elastic restoration when the insertion into the guide pipe 3 is completed. At the upper end of the support body 10, there is formed a detent protrusion 13 that engages with the groove 12 at the upper end of the guide pipe 3. Further, at the upper and lower ends of the support body 10, there are formed protrusions 14 that are in surface contact with the wall surface of the guide pipe 3.

Next, a lock mechanism of the right headrest support 4 will be described with reference to FIG. 5 showing an explanatory view thereof. In addition, in FIG. 5, (a) is a plane cross-sectional view and (b) is a cross-sectional view taken along line DD of (a). A metal lock plate 15 is slidably incorporated in the head portion 11 of the support body 10. The lock plate 15 is provided with a rectangular lock hole 16 and an elongated slide hole 18. Further, a synthetic resin operating portion 19 is insert-molded at the base end portion (right end portion in the drawing) of the lock plate 15.

A metal stopper pin 20 penetrating the slide hole 18 is driven into the head portion 11, and a metal spring 8 for urging the lock plate 15 in a pulling direction (left side in the drawing). Is built in. By the way, in the prior art, although there are guide walls for guiding the upper and lower surfaces of the lock plate 15 in the head portion 11, there is no guide wall for slidingly guiding both side edges of the plate. Therefore, two springs 8 are arranged symmetrically for the purpose of balancing the sliding of the lock plate 15 and obtaining a smooth sliding operation.

When supporting the headrest 6 with respect to the headrest support 4, the stays 7 of the headrest 6 are inserted into the insertion holes 9 of the left and right headrest supports 4, respectively. Then, as shown by the chain double-dashed line in FIG. 5 (b), one of the plurality of positioning grooves 7 a provided on the right stay 7 is provided with the edge of the lock hole 16 of the lock plate 15. The height (position) of the headrest 6 is achieved by engaging the portion (referred to as an engaging portion) 22 with the bias of the spring 8. In addition, if the engagement portion 22 is disengaged from the positioning groove 7a of the stay 7 by pushing the operation portion 19 of the lock plate 15 against the elasticity of the spring 8, the height position of the headrest 6 can be adjusted. Can be adjusted.

[0008]

[Problems to be solved by the device]

 According to the conventional headrest support 4, since the two springs 8 are incorporated, the number of parts is large and the assemblability is poor, so that there is a problem that the cost is high.

Therefore, the present invention has been made to solve the above-mentioned problems, and the purpose thereof is to reduce the number of parts and improve the assemblability, thereby making it possible to reduce the cost. To provide.

[0010]

[Means for Solving the Problems]

 The headrest support of the present invention which solves the above-mentioned problems is incorporated in a support body provided on the frame side of the seat back and into which the stay of the headrest is inserted, and slidably mounted on the head of the support body with a predetermined movement amount. A headrest support comprising: a lock plate; a spring for urging the lock plate in a removal direction; and an engaging portion formed in the lock plate and engaged with a positioning groove of the stay by the urging force of the spring. A guide wall for slidingly guiding the lock plate is provided on the head of the support body, and one spring adjacent to one side of the lock plate is arranged as the spring.

[0011]

[Action]

 According to the headrest support, the engaging portion of the lock plate engages with the positioning groove of the stay of the headrest with the elasticity of the spring, whereby the height of the headrest is positioned. Further, by pushing the lock plate against the elasticity of the spring to release the engagement of the engagement portion with the positioning groove of the stay, the height of the support can be adjusted.

[0012]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. In this example, the lock mechanism for positioning the height of the headrest 6 in the conventional example is modified. Therefore, the changed part will be described in detail, and it is considered that the structure is the same as or equivalent to that of the conventional example. Are denoted by the same reference numerals in the drawings, and redundant description will be omitted. The headrest support 4 is shown in an exploded perspective view in FIG. 1, and its main part is shown in an explanatory view in FIG. In addition, in FIG. 2, (a) is a plane sectional view and (b) is a sectional view taken along the line AA of (a).

A metal lock plate 15 in which a synthetic resin operating portion 19 is insert-molded at a base end portion and slidably incorporated in the head portion 11 is formed in a substantially C shape, and a tip end portion thereof is formed. It has a slide hole 18. The lock plate 15 has an engagement portion 22 set inside the tip end portion thereof, and an engagement protrusion 23 for engaging the end portion of the spring 8 is formed at the open end portion of the base end portion thereof. Has been done. A side edge of the lock plate 15 on the side opposite to the opening side is a linear guide edge 24 parallel to the sliding direction.

The lock plate 15 is slidably incorporated in the head 11 so that one end of the spring 8 is engaged with the engaging projection 23 of the lock plate 15, and then the lock plate 15 is made of metal and penetrates through the slide hole 18. The pin 20 is driven in. Further, inside the head portion 11, a guide wall 25 with which the guide edge 24 of the lock plate 15 abuts is formed. The guide wall 25 slides and guides the lock plate 15 via the guide edge 24.

The axis C of the stopper pin 20 is offset to the side opposite to the spring (downward in FIG. 2A) with respect to the straight line L passing through the axis of the slide hole 18 in the sliding direction. Therefore, the lock plate 15 can be operated in parallel and the slide can be smoothly performed.

Each of the positioning grooves 7a of the stay 7 has a stepped upper wall surface and a gently sloping lower wall surface, as shown by the chain double-dashed line in FIG. 2 (b). There is. Therefore, when the headrest 6 is moved upward, the lock plate 15 is moved in the unlocking direction by the inclined surface, so that the headrest 6 can be moved upward without operating the lock plate 15.

According to the headrest support, the engaging portion 22 of the lock plate 15 is provided in any one of the positioning grooves 7a of the stay 7 of the headrest 6 and the spring 8 as shown by a chain double-dashed line in FIG. 2B. The elastic engagement allows the height of the headrest 6 to be positioned. In addition, if the engagement portion 22 is disengaged from the positioning groove 7a of the stay 7 by pushing the operation portion 19 of the lock plate 15 against the elasticity of the spring 8, the height position of the headrest 6 can be adjusted. Can be adjusted.

[0018]

[Effect of device]

 According to the headrest support of the present invention, two springs, which conventionally required two springs, have the same function, so that the number of parts can be reduced and the assembling efficiency can be improved, thus reducing the cost. Is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a headrest support.

FIG. 2 is an explanatory diagram showing a main part.

FIG. 3 is an exploded perspective view showing a conventional example.

FIG. 4 is an explanatory diagram showing a right support.

FIG. 5 is an explanatory view showing a lock mechanism.

[Explanation of symbols]

 4 Headrest Support 7 Stay 7a Positioning Groove 8 Spring 10 Support Body 11 Head 15 Lock Plate 22 Engagement Part 25 Guide Wall

Claims (1)

[Scope of utility model registration request] 1. A support main body which is provided on the frame side of a seat back and into which a stay of a headrest is inserted, a lock plate slidably mounted on the head of the support main body with a predetermined movement amount, and the lock plate. A headrest support comprising: a spring that urges in a pull-out direction; and an engaging portion that is formed in the lock plate and that engages with the positioning groove of the stay by the urging of the spring. A headrest support in which a guide wall for slidingly guiding the lock plate is provided, and as the spring, one spring adjacent to one side of the lock plate is arranged.