JPS639762Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slide mechanism that can move and adjust its position in both directions, and can lock and hold its position in both directions.

For example, if the headrest of a vehicle seat can be moved and adjusted vertically or longitudinally depending on the body shape or preference of the occupant, it is possible to further improve the feeling.
Conventionally, various slide mechanisms have been appropriately employed.

By the way, conventionally, this type of slide mechanism is generally configured to be able to move and adjust its position only in one direction and lock the position against movement in the opposite direction. Some problems have arisen when using it as a direction adjuster. That is, a normal headrest may have a structure that can be locked only to the rear of the seat, but for example, in the headrest 1 used for a seat for two people as shown in FIG. When the seat bag 2 is located on the left side (indicated by the imaginary line) in the figure, it must be able to be locked in the right direction.On the other hand, when the seat bag 2 is located on the left side in the figure (indicated by the imaginary line), it must be able to be locked in the left direction. , each must be configured to be able to move and adjust its position in both directions as the case requires, and to be able to be locked and held at the desired position, which cannot be handled by conventional slide mechanisms.

The purpose of the present invention is to provide an inexpensive and simple structure that can easily and quickly move and adjust its position in both directions in response to such requests, and that can lock and hold the adjusted position in an appropriate direction. It provides a sliding mechanism, which will become clearer from the detailed description below with reference to the drawings.

Fig. 2 shows an embodiment in which the slide mechanism according to the present invention is applied to a movable headrest that can move in the front and back direction. A pair of lock cases are fixed in a substantially horizontal state on a stay 11 attached to a fixed side of a seat back frame (not shown). Further, slide pipes 12, 12 are slidably supported in the lock cases 10, 10 respectively along the longitudinal direction, and these left and right slide pipes 12, 12 have a pair of front and rear parts that form a downward U-shape. support arm 13,
13. A headrest frame 15 constituting a movable headrest 14 is placed and fixed on these support arms 13, 13.

Now, according to the present invention, in the slide mechanism consisting of the lock case 10 and the slide pipe 12 as described above, the slide pipe 12 can be moved and adjusted in both directions with respect to the lock case 10, and moreover, it is possible to move and adjust the slide pipe 12 in both directions at the desired adjustment position. The feature is that it can be locked and held.

To explain this in detail with reference to FIGS. 3 to 6, the lock case 10 includes a rectangular cylindrical body 17 in which a plurality of locking holes 16 are bored at predetermined intervals along one side of the lock case 10 in the longitudinal direction. It is comprised of a pair of end members 18 and 19 attached to both ends. The slide pipe 12 passes through a through hole 19a formed in one end member 19 and is supported with its tip facing inside the lock case 10. In this case, the inner surfaces of the end members 18 and 19 have first and second engaging portions 2 that engage with a second stopper cam, which will be described later.
0 and 21 are provided in a protruding manner.

As is clear from FIG. 3, a long groove 12a is formed at the tip of the slide pipe 12, and the slide pipe 12 is always biased toward the long groove 12a by a spring 22 from the tip. The pressing rod 23 is inserted. At the tip of this pressing rod 23, there is a locking pawl 24a that locks into the locking hole 16 of the lock case 10.
A first stopper cam 24 having a diameter is rotatably supported. An arcuate groove 24b that curves toward the other end is formed in the approximate center of the first stopper cam 24, and a second stopper cam, which will be described later, is supported in the arcuate groove 24b at the tip of the slide pipe 12. A supporting shaft 25 is fitted therein. Therefore, this first stopper cam 24 is inserted into the groove 24b within the long groove 12a of the slide pipe 12.
It is configured to be rotatable within the range regulated by.

Further, on a support shaft 26 implanted at the other end of the first stopper cam 24, there are provided a support shaft 26 which is located on both sides of the first stopper cam 24 and which is attached to the slide pipe 1.
a pair of second stopper cams 27 whose longitudinal centers are pivotally supported on a support shaft 25 which is pivotally supported at the two ends;
28 is pivotally supported. These second stopper cams 27, 28 are formed with locking claws 27a, 28a that are locked in the locking hole 16 of the lock case 10, and one of the second stopper cams 27, 28 is formed with a locking claw 27a, 28a.
A protrusion 29 that engages with a first engaging portion 20 provided on the end member 18 of the lock case 10 is provided at a portion closer to the lock case 10, and a second protrusion 29 is provided at a portion closer to the support shaft 26 on the other side.
A protrusion 30 that engages with the engagement portion 21 is formed. In this case, these second stopper cams 2
The locking claws 27a and 28a of the first stopper cam 24 in the locked state
It is configured so that it can be locked in the opposite direction to a.

The slide mechanism with such a configuration operates as follows.

That is, as shown in FIG. 4, when the slide pipe 12 is moved to the left in the figure with respect to the lock case 10, the first stopper cam 24
is maintained in a rotated state opposite to the locking hole 16, and its locking pawl 24a is supported at a position where it does not engage with the locking hole 16, while the second stopper cam 2
7 and 28, the locking claws 27a and 28a are connected to the locking hole 1.
6, and is elastically supported by the biasing force of the spring 22 transmitted via the first stopper cam 24 in that state. In this state, the slide pipe 12
The second stop cam 2 is moved to the left.
7 and 28 are sequentially locked to the consecutive locking holes 16,
This means that the locking position can be moved and adjusted by repeatedly releasing the lock. Of course,
In the locked state, the rightward movement of the slide pipe 12 is restricted by the engagement between the locking claws 27a, 28a and the locking hole 16, and the slide pipe 12 can be positioned and fixed at the adjusted position. It is. Note that the unlocked slide pipe 12
The state at the time of movement to the left is shown by an imaginary line in FIG.

Further, when the above-mentioned state is repeated and the tip of the slide pipe 12 reaches the left end of the lock case 10, the first protrusion 29 provided on one of the second stopper cams 27 and 28 is moved to the engagement portion on the lock case 10 side. 20, and is rotated clockwise in the figure, resulting in the state shown by the imaginary line in FIG. Then, since the support shaft 26 provided at the other end of the first stopper cam 24 crosses the axis of the slide pipe 12 and changes its position from below to above, the biasing force of the spring 22 is reversed, and the first stop cam 24 The stopper cam 24 rotates to a position where its locking pawl 24a can engage with the locking hole 16 and is elastically supported in that state, while the second stopper cams 27 and 28 have their locking pawls 27a and 28a. It is rotated to a position where it does not engage with the locking hole 16 and maintains that state. This state is shown by the solid line in FIG.

Then, when the slide pipe 12 is moved to the right in the figure in this state, the first slide cam 24 repeatedly engages and disengages with the locking hole 16, contrary to what was described above. Furthermore, when in the engaged state, it is possible to reliably hold and hold the slide pipe 12 from moving to the left at that position.

Further, when the above-mentioned state is repeated and the tip of the slide pipe 12 reaches the right end of the lock case 10, the second protrusion 30 provided on the second stopper cam 28 moves to the engagement portion on the lock case 10 side, contrary to what was described above. 21, whereby the second stopper cams 27, 28 are rotated counterclockwise in the figure, returning the locking claws 27a, 28a to a state in which they can be engaged with the locking hole 16, The first stopper cam 24 is disengaged from the locking hole 16 and rotated to a position where it does not engage. This state is shown by the imaginary line in FIG. 6, and when the slide pipe 12 is then moved to the left, it becomes the state shown by the solid line, and the operation shown in FIG. 4 is repeated.

In addition, the second stopper cam 2 forming the pair
7 and 28 rotate integrally, so that the engaging parts 20 and 21 on the lock case 10 side, which engage with the protrusions 29 and 30 provided respectively, are engaged only with the corresponding protrusions 29 and 30. Needless to say, it is provided within the lock case 10 in such a way that it can be fitted together.

Therefore, by using the slide mechanism configured as described above, the locking position can be moved and adjusted in both directions by simply moving the slide pipe 12, and moreover, it can be locked and held at the desired adjustment position. It can be used as a headrest for seating seats, etc., and can exhibit its effects.

It should be noted that the above description merely shows one embodiment of the present invention, and it is obvious that various modifications and changes can be made to the structure, shape, etc. of each part without departing from the spirit of the present invention. Moreover, it will be easily understood that its field of application is not limited to the head rest of a seat.

As explained above, according to the slide mechanism according to the present invention, first and second stopper cams each having a locking pawl that can be locked in opposite directions are provided at one end of the slide pipe that is slidable on the lock case. This structure is simple and easy to manufacture because it is used alternately as a locking member for the locking hole on the lock case side by reversing and rotating it by skillfully utilizing the dead point of the spring.
The movable side can be appropriately moved and adjusted in both directions with a simple operation, and can be locked and held at the desired position, which has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of a facing seat showing an application example of the slide mechanism according to the present invention, Fig. 2 is an exploded perspective view showing an embodiment in which the slide mechanism according to the invention is applied to a movable headrest, and Fig. 3 2 is a detailed view of part A in FIG. 2, and FIGS. 4 to 6 are partially omitted vertical sectional side views for explaining the operating state thereof. In the figure, 10... Lock case, 12... Slide pipe, 12a... Long groove, 16... Locking hole, 2
0, 21...first and second engaging portions, 22...
Spring, 23...pressing rod, 24...first
Stopper cam, 24a...Latching claw, 24b...
Arc-shaped groove portion, 25, 26... Support shaft, 27, 28...
Second stopper cam, 27a, 28a...locking pawl, 29, 30...first and second projections.

Claims (1)

[Scope of utility model registration request] A lock case having a plurality of locking holes drilled at predetermined intervals in the longitudinal direction, a slide pipe disposed penetrating through the lock case and slidable along the longitudinal direction, and the slide pipe. a pressing rod inserted into the slide pipe and biased in one direction, and one end of the pressing rod is pivotally supported at the tip of the pressing rod within a long groove formed at one end of the slide pipe, and is locked in a locking hole of the lock case. a first stopper cam having a locking pawl; one end of the first stopper cam is pivotally supported on the other end side by a support shaft, and the longitudinal center portion is supported by a support shaft attached to one end of the slide pipe. a second stopper cam that is pivotally supported and has a locking pawl whose other end is locked in a locking hole of the lock case; an arcuate groove is formed in the first stopper cam; A support shaft that is pivotally supported at the tip of the pipe and supports the second stopper cam is fitted and locked, and this arc-shaped groove portion is formed in the arc-shaped groove with the support shaft provided at the other end of the first stopper cam as the center. The support shaft fitted into the groove is relatively rotatable, and the second stopper cam is rotated when it engages with the engaging portions provided at both ends of the lock case, and the second stopper cam is rotated and locked. The pawl is supported in a position where it can engage with the locking hole and a position where it does not engage, and in the non-engaging state, the first stopper cam rotates to a position where the pawl can engage with the locking hole. A slide mechanism configured to be supported by.