JPH0517965Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a headrest structure that is vertically movably supported by a headrest stay at the upper end of a seat bag.

[Conventional technology]

Generally, in a vehicle seat or the like, a headrest that supports the head of a seated person from the back side is provided at the upper end of the seat back so as to be movable up and down via a headrest stay. By the way, in conventional headrests of this type, a pair of left and right headrest stays hanging from the main body are attached to a resin stay holder provided on the seatback frame, etc. at the upper end of the seatback. By inserting and holding each stay, it is supported so that it can move up and down, and the height position in the vertical direction can be adjusted while inserting and removing these stays, as well as a lever for external operation provided on one side of the holder, etc. The structure is such that a locking mechanism such as a locking pawl is actuated to lock and fix the device at an appropriate height position.

[The problem that the idea attempts to solve]

However, according to the conventional headrest structure described above, the headrest stay is inserted and held in a stay holder provided on the seat back side, and at least one of the holder sides locks the locking groove etc. formed in the stay. It is configured to be locked with a claw or the like, and requires such a locking mechanism and a lever for external operation to lock or unlock it, and the configuration of each of these parts is complicated and not only increases costs. However, when the lock is locked, there is a problem in that it is likely to rattle because it is locked from one side.

In particular, in the conventional structure described above, in order to adjust the height position of the headrest by moving it up and down, an external operation lever such as a lock mechanism attached to the holder side is required. The location of levers, etc., has become a problem. In other words, if a lever or the like is installed in a position where it is easy to operate, there is a risk of damaging the overall appearance of the seat.If it is installed with consideration to appearance, it may be difficult to confirm the position of the lever, and furthermore, depending on the position of the lever, it may be difficult to confirm the position of the lever. This caused inconvenience in terms of operability, as it was difficult to operate while seated. Furthermore, the above-mentioned conventional structure requires the troublesome operation of releasing a lever etc. with one hand while moving and adjusting the headrest in the vertical direction with the other hand, which poses a problem in terms of adjustment operability. In consideration of these points, it is desired to take some measures that can eliminate the above-mentioned problems.

[Means to solve the problem]

In order to meet such demands, the head restraint structure according to the present invention includes a head restraint body that is vertically movably supported with respect to the left and right stay portions of the head restraint stay that is provided upright on the upper end side of the seat bag. , a plurality of stopper grooves are cut out at predetermined intervals in the longitudinal direction of the left and right stay portions, and a pair of locking ends are selectively locked to the stopper grooves of each of these steps. Approximately U that urges these locking ends toward each other
A locking spring means having a shape of a letter is provided in the headrest body, and each locking end is moved in the unlocking direction by pressing the lower central portion of the spring means on the bottom side of the headrest body. It was designed to be obtained.

[Effect]

According to the present invention, the pair of locking ends are formed by the biasing force of the locking spring means in the stopper groove formed in the left and right stay portions of the head rest stay in plural steps in the longitudinal direction. By being engaged with any stage of the spring means, the headrest body is locked and held at a required height position, and the bottom side of the headrest body is pressed, and each locking end is pulled from the center lower side of the spring means. By moving it in the unlocking direction and separating it from the stopper groove of each stage against the urging force, and by moving and adjusting the headrest in the vertical direction, by sequentially and intermittently engaging the stopper groove of the next stage, The headrest can be moved and adjusted to a predetermined height position.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

1 to 3 show an embodiment of the headrest structure according to the present invention, and in these figures, the headrest main body, which is designated as a whole by the reference numeral 1, is attached to the seat 2, as is clear from FIG. The seat bag 3 is supported so as to be movable and adjustable in the vertical direction by a head rest stay 10 (described later) having a downward U-shape having left and right stay portions 10a and 10b, which is provided upright from the upper end side. has been done. It is well known that 4 in FIG. 4 is a seat cushion, and the seat back 3 is provided upright on the rear end side to constitute the vehicle seat 2 and the like.

Now, according to the present invention, when the headrest main body 1 described above is vertically movably supported on the upper end side of the seat bag 3, as is clear from FIGS. Headrest stay 10 that is fixedly installed upright
A plurality of stopper grooves 11, 11 are cut out at predetermined intervals in the longitudinal direction (vertical direction) of the left and right stay portions 10a, 10b, and each step of the stopper grooves 11, 11 is provided with a plurality of stopper grooves 11, 11. The locking ends 12 have a pair of locking ends 12a and 12b that are curved so as to be selectively locked.
A wire spring 12 as a locking spring means having a substantially U-shape that biases a and 12b toward each other is provided in the headrest body 1, and a central lower portion 12c of the wire spring 12 is provided. , by pressing from the bottom side of the headrest main body 1, each locking end 12a, 12
The feature is that b can be moved in the unlocking direction.

Here, as is clear from FIG. 1 etc., this wire spring 12 is bent into a substantially upward U-shape, and its free end is connected to the locking end.
2a, 12b are formed to be curved laterally, and these locking ends 12a, 12b can be wrapped around the left and right stay portions 10a, 10b and engaged in the stopper groove of any step. , so that the height position of the headrest body 1 can be locked. Note that this wire spring 12 is as follows:
By forming the free shape in such a shape that the locking ends 12a and 12b face each other closer than their width when locked, the required locking pressure can be obtained during engagement.

In addition, in this embodiment, the central lower portion 12c of the wire spring 12 described above is a concave portion of the headrest body panel 13 formed in a concave manner at the bottom side of the headrest body 1, as is clear from FIG. This concave portion 13a is covered by a trim cover 14 so that the spring 12 and the like are not visible from the outside. However, the present invention is not limited to this, and the wire spring central lower portion 12c described above is located outside the headrest main body 1,
Of course, it may be configured to be directly operable from the outside.

In the figure, 13b and 13c are holes drilled in the panel 13 that prevents the wire spring 12 from shifting laterally and guides it in a predetermined posture, and 15a and 15b are the left and right locking ends 12a and 1 of the wire spring 12, respectively.
This is a regulating end for regulating the upward movement of the portion adjacent to the locking end 2b and allowing each of the locking ends 12a, 12b to move only in the horizontal direction, and is provided, for example, on a headrest frame. Furthermore, 16, 16 in FIG. 1 are provided on the panel 13, and left and right stay portions 10 are provided.
This is a stay holder that is fitted into the parts a and 10b so as to be able to move up and down.

According to such a configuration, the pair of locking ends 12a and 12b are moved to the head rest stay 1 by the urging force of the locking wire spring 12.
The headrest main body 1 is raised to the required height by being engaged in any step of the stopper grooves 11, 11, which are cut out in multiple steps in the longitudinal direction in the left and right stay portions 10a, 10b of the 0. Locked in position. Also, by pressing the bottom side of the headrest main body 1, the spring center lower part 12c is lifted upward, and each locking end 12a, 12b is expanded outward in the locking release direction (as shown by the imaginary line in FIG. 2). the stopper grooves 11, 1 of each stage.
1 against the urging force to release the locked state, and while adjusting the movement of the headrest main body 1 in the vertical direction, the stopper grooves 11, 11 of the next stage are sequentially and intermittently engaged with the headrest main body 1, thereby achieving a predetermined state. The headrest main body 1 can be moved and adjusted in height.

Therefore, according to such a configuration, each locking end of the spring 12 can be fixed by simply moving the bottom side of the headrest body 1 up and down while pressing the bottom side of the headrest main body 1, with a simple and inexpensive configuration using a minimum number of parts. Release the locked state of 12a and 12b,
The height position can be easily and appropriately adjusted, eliminating the need for external operating means (levers, etc.), which previously had problems in terms of appearance and operability.
Also, the left and right stay portions 1 of the head rest stay 10
Since the spring 12 of the double-sided locking type has a pair of locking ends 12a and 12b that lock the locks 0a and 10b, respectively, problems such as rattling when one side is locked as in the past are reduced. There are various excellent effects such as.

In particular, according to the present invention, a wire spring 12 having a simple shape is used as the locking means, and its elastic force is used to obtain locking pressure, which simplifies the structure of each part including the lock structure. It has advantages such as being small, lightweight, and low cost.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part of the headrest body 1 and seat back 3 may be modified or changed as necessary, and various modifications may be considered. Let's be. For example, in the above-described embodiment, the shape of the head rest stay 10 whose lower end is fixed to the upper end of the seat back 3 may be composed of two stays, one on the left and one on the right. Various modifications may be made to the number of stopper grooves 10a, 10b, the shape of the spring means formed by the wire spring 12 having locking ends 12a, 12ab, and the like.

[Effect of idea]

As explained above, the headrest structure according to the present invention includes a headrest main body that is vertically movably supported with respect to the left and right stay portions of the headrest stay provided upright on the upper end side of the seat bag, A plurality of stopper grooves are cut out at predetermined intervals in the longitudinal direction of the left and right stay portions, and a pair of locking ends are selectively locked to the stopper grooves of each of these steps. A locking spring means having a substantially U-shape that urges these locking ends toward each other is provided in the headrest body, and the central lower part of the spring means is inserted from the bottom side of the headrest body. Since each locking end can be moved in the unlocking direction by pressing, it is possible to move each locking end in the unlocking direction by pressing the bottom side of the headrest body, despite the simple and inexpensive configuration with the minimum number of parts. By simply moving it up and down, the locking state of the spring means can be released and its height position can be easily and appropriately adjusted. This eliminates the need for locking means and uses a double-side lock type spring means that has a pair of locking ends that lock the left and right stay portions of the headrest stay, respectively, so that the problem that occurs when one side is locked as in the conventional case is eliminated. It has various practical effects such as reducing problems such as sagging.

In particular, according to the present invention, a simple wire spring is used as the locking means, and its elastic force is used to obtain locking pressure, which simplifies the structure of the lock and other parts, and makes it compact and lightweight. , there are advantages such as cost reduction.

[Brief explanation of drawings]

Fig. 1 is an enlarged schematic sectional view of essential parts showing an embodiment of the headrest structure according to the present invention, Fig. 2 is an explanatory diagram of its operation, and Fig. 3 shows a preferred seat structure to which the present invention is applied. It is a schematic perspective view. In the figure, 1...Head rest main body, 3...Seat back, 10...Head rest stay, 10a,
10b... Left and right stay portions, 11... Stopper groove, 12... Wire spring (locking spring means), 12a, 12b... Locking end, 13...
...Head rest main body panel, 14...Trim cover.

Claims (1)

[Scope of utility model registration request] The seat bag includes a head rest stay that is provided upright on the upper end side of the seat back and has left and right stay sections, and a head rest main body that is supported in a vertically movable manner with respect to the head rest stay, and that the left and right stay sections have longitudinal sides. A plurality of stages of stopper grooves are cut out at predetermined intervals in the direction, and a pair of locking ends are selectively locked to the stopper grooves of each stage, and these locking ends are brought close to each other. A substantially U-shaped locking spring means biased in the direction is provided on the headrest main body, and the central lower part of the spring means is pressed against the bottom side of the headrest main body to lock the headrest main body. A headrest structure characterized in that each locking end is configured to be movable in a lock release direction.