JPS6236453Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a height-adjustable headrest mounted on a seat back of a vehicle seat.

Conventionally, this type of headrest has had a lever that releases the locking mechanism of the headrest fixed to the surface of the seat bag. Therefore, since the lever is exposed to the outside, there is a problem that not only the aesthetic appearance is impaired but also there is a possibility of erroneous operation and safety cannot be ensured. Moreover, since it is necessary to equip the seat bag with a fixing member for fixing the lever, the structure is complicated and the mounting means is required.

Therefore, the present invention was proposed to eliminate such drawbacks of conventional products, and its basic configuration is that a lever for releasing the lock is built into the seat bag, and a locking mechanism is attached to each of the two stays. This can be released by a lever placed horizontally between the left and right stays.

Note that some models have an operating member for unlocking built-in inside the seat (for example, the
125156), which are arranged in a dotted manner inside the seat located outside one of the stays of the headrest. Therefore, it is difficult to confirm the location of the operating member from the outside, and since the operating member is in the form of a dot, the operability is extremely poor.Furthermore, since it is located outside the stay, it is difficult for passengers in the rear seat to There was a risk that the operator would operate the operating member by mistake.

In addition, Japanese Utility Model Publication No. 47-36345 discloses a device in which each of the two stays has a locking mechanism, and this locking mechanism can be resolved with one operating member. Since it is exposed to the outside, it lacks safety. Furthermore, since the operating member is disposed on one side of the lock member, it is difficult to synchronize when releasing the lock, resulting in a problem that the certainty of releasing the lock is poor.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, a is the headrest main body, and this headrest main body a has a conventionally well-known structure, with bar-shaped slurs 1, 1 hanging down on the left and right sides of the bottom, and these are inserted into a guide cylinder 3 fixed to the back frame b of the seat B. . Then, the slurs 1 and 1 in this sheet B and the guide tube 3
A locking mechanism is provided at each end. The illustrated locking mechanism (a) includes a notch 1a for height adjustment provided on one side of each slurry, a substantially U-shaped lock spring 4 that engages with the notch 1a, and a horizontal cutout in the guide tube 3. A slit 7 for inserting the lock spring is disposed in the guide cylinder 3 so as to be able to rise and fall freely, and the stay 1,
1 is inserted through the holder 5, and the holder 5 has a notch 8 having a triangular cross section on one side for engaging and disengaging a lock spring, and is biased upward by a spring 6. 3a in the figure is a flange provided on the upper edge of the guide tube 3;
Reference numeral 5a indicates a flange provided on the upper edge of the holder 5, and the upper and lower ends of the spring 6 wound around the holder 5 are engaged with both ends 3a, 5a of the flange to urge the holder 5 upward. The slits 7 of the guide tube 3 and the notch 8 of the holder 5 are opened at approximately the same position when the holder 5 is biased by the spring 6, so that the lock spring 4 is closer to the notch 8 than the slit 7. so that it can be inserted by crossing over.

The cutout 8 has a substantially triangular cross section with its lower side substantially perpendicular to the axis of the holder 5 and its upper side inclined, and its deep edge is located at the notch 1a of the slurr 1.
It is long enough to reach. Therefore, since the upper side is formed in an inclined shape, when the holder 5 is lowered, the lock spring 4 fitted and locked in the slits 7 moves (in the radial direction) along the upper side of the notch 8. It engages and disengages from the notch 1a of the slurs 1,1. 9 in the figure is the notch 8 in the holder 5
This is a groove for sliding the lock spring 4 provided on the opposite surface of the lock spring 4.

The lever 2 is placed between the left and right holders 5 and 5.
is hung horizontally so that it can be raised and lowered freely, and a skin b' that hides the lever 2 is placed above the lever 2. This skin b' is stretched with some slack so that the lever 2 can be pushed from the outside.

When the skin b' below the headrest main body a is pressed downward, the lever 2 and the holder 5 descend against the elastic force of the spring 6. This holder 5
As the lock spring 4 is lowered, the lock spring 4 that engages with the notch 1a of the stay 1 expands (by pressing the upper side of the notch 8 of the holder 5) and disengages from the notch 1a of the stay 1, releasing the locked state. (Figures 6 and 7). Therefore, since the headrest body a can be moved in the vertical direction, it is adjusted to a predetermined height. After that, when the pressing state of the lever 2 through the skin b' is released, the lever 2 and the holder 5 are released from the spring 6.
The lock spring 4 returns to its original state due to its elasticity, and the lock spring 4 closes the notch 1 of the slur 1 due to its elasticity.
a and becomes locked. (Fig. 4, 5
figure).

Since the present invention is constructed as described above, it has the following advantages.

(1) This product has a structure in which the lever is built into the seat between the left and right stays of the headrest, so the lever does not protrude outside, improving safety. Moreover, since the possibility of erroneous operation is reduced, safety can be further improved.

(2) Since a locking mechanism is provided on each of the two stays and a lever for releasing the lock is provided between the two locking mechanisms, the operating force for releasing the lock simultaneously and equally acts on both the locking mechanisms. Therefore,
The lock release operation using the lever is reliable and the lock can be released accurately.

Furthermore, since the lever is disposed between the two stays, its position can be easily confirmed even if the lever is built into the seat, and since it is disposed in a line, it is easy to operate.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway perspective view, FIG. 2 is an enlarged perspective view of the main part, FIG. 3 is an exploded view, and FIG. 4 is a lock. FIG. 5 is a longitudinal sectional view taken along the line X-X, FIG. 6 is a partially cut-away front view showing the unlocked state, and FIG. 7 is a Y- It is a longitudinal cross-sectional view taken along the Y line. In the figure, a is the headrest main body,
1 and 1 indicate a stay, 2 a lever, and A a lock mechanism, respectively.

Claims (1)

[Scope of utility model registration request] A head rest main body, a stay vertically disposed on the left and right sides of the bottom of the head rest main body, each having a notch for height adjustment, and a guide tube into which the stay is inserted so as to be able to rise and fall and is fixed to the back frame of the seat;
It consists of a locking mechanism provided on each stay and guide tube within the seat, and a lever for releasing the lock installed horizontally between the left and right stays near the skin inside the seat, and the locking mechanism engages with the notch of the stay. A substantially U-shaped lock spring that fits together, a slit cut horizontally in the guide cylinder for fitting the lock spring, and a slit that is arranged in the guide cylinder so as to be able to rise and fall freely, and a stay is inserted into the inside and engaged with the lock spring. A headrest comprising a holder having a notch with a triangular cross section for engaging and disengaging and which is biased upward, and in which the lever is horizontally suspended on the upper ends of the left and right holders.