JPS6220046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest vertical adjustment device for an automobile seat.

2. Description of the Related Art Conventionally, a device is known that can adjust the vertical position of a headrest that supports a driver's head depending on the sitting height of the driver.

Such a device includes, for example, (i) a recessed groove provided in the pole of the headrest, a locking piece that can be freely engaged and detached in the recessed groove attached to the seat back frame, and an adjustment lever provided on the side of the seat back operated. (ii) a groove is provided in the pole of the headrest;
The pole guide body through which the pole is inserted is provided with an engagement plate that engages with the recessed groove, and the engagement plate is slidable relative to the pole guide body in a direction perpendicular to the pole axis and is attached to the pole guide body. (iii) A locking means is installed inside the seat back, and the headrest can be locked by tilting the headrest body. (for example, Utility Model Publication No. 22910, Utility Model Publication No. 55-22910,
(Refer to Publication No. 51328).

However, all of the above-mentioned devices have the disadvantage that they are complicated and expensive, and in particular, the device (iii) has the disadvantage that the operation method for unlocking is unclear.

The present invention has been made in view of these conventional drawbacks, and it is an object of the present invention to provide a headrest vertical adjustment device for an automobile seat that is easy to operate, inexpensive, and reliably performs each function.

The present invention includes a pair of poles having one end fixed to the headrest body and the other end inserted into the seat bag, a plurality of grooves formed in the side of one of the seats, and a seat bag frame. It is supported by a supporting member fixed substantially horizontally on the upper side so as to be tiltable in the substantially horizontal direction with the lower part as a fulcrum, and the one pole is inserted therethrough, and at least the upper part is a long hole wider than the one pole. a vertically long pole guide having an insertion hole; an engaging piece that is removably engaged with the groove of the one pole and is integrally provided on the upper part of the pole guide;
a spring means located outside the pole guide that constantly biases the pole guide in a direction in which the engaging piece engages with the groove; and an upper part of the pole guide;
a pressing operation part formed on a side opposite to the engagement piece; by pressing the pressing operation part of the pole guide, the engagement between the engagement piece and the concave groove of the pole is released; The headrest body can be adjusted in the vertical direction.

Embodiments of the present invention will be described below with reference to the drawings.

<Example 1> In Figs. 1 to 5, reference numeral 1 denotes a car seat, and a seat back 4 is tiltably connected to a seat bottom 2 attached to the floor of a car body (not shown) via a reclining device 3. A pillow-shaped headrest main body 5 is attached to the upper part of the seat bag 4 so as to be vertically adjustable.

A seat bag frame 6 is installed inside the seat bag 4 and forms the frame of the seat bag 4. This seat back frame 6 has a support member 8 fixed to the upper side of a frame body 7 made of a pipe frame. This support member 8 has a substantially horizontal upper support portion 8a and a lower support portion 8b substantially parallel to the upper support portion 8a.

Reference numeral 10 denotes a movable pole guide that is long in the vertical direction, and includes a square cylindrical guide body 10a, and the guide body 10.
It consists of a rectangular flange 10b connected to the upper part of the guide body 10b, and an insertion hole 10c that vertically passes through the guide body 10a and the flange 10b, and is bored at the lower end (the guide body 10a). The engagement grooves 10d in the width direction are the engagement holes 8c of the upper support portion 8a.
The seat is engaged to be tiltable in the seat width direction W (lateral direction). The upper part of the insertion hole 10c is wider in the seat width direction W than a guide pole 12 (described later) which is inserted into the insertion hole 10c, and the width becomes narrower toward the bottom, so that the guide body 10a and the upper support part 8a The width (diameter) of the guide pole 12 is formed near the engaging portion of the guide pole 12 . That is, the insertion hole 10c has a tapered shape in which the upper side is larger than the lower side. Further, a pressing operation part 10e is formed on one side edge of the collar part 10b, that is, on the side facing a lock pin 14, which will be described below. It is configured to be tiltable in the width direction W.

Reference numeral 11 designates a fixed pole guide, which includes a cylindrical guide body 11a, a rectangular collar 11b connected to the upper end of the guide body 11a, and both 11a, 11
The guide main body 11a has an insertion hole 11c penetrating through the upper support portion 8a, and a substantially middle portion of the guide body 11a is connected to the upper support portion 8a.
The lower end portions are each fixedly supported by the lower support portion 8b.

12 and 13 are a guide pole and a sliding pole, respectively, one end of which is fixed to the lower side of the headrest main body 5, while the other end is inserted into the insertion hole 10c of the movable pole guide 10 and the fixed pole guide 11, respectively. It is inserted into the seat bag 4 through the insertion hole 11c.

A plurality of grooves 12a, 12a, 12a, 12b are formed on the side of the guide pole 12 at predetermined intervals.
are formed, and the grooves 12a, 12a, 12a, 1
2b, a lock pin 14 (engaging piece) integrally provided near the flange 10b in the insertion hole 10c of the movable pole guide 12 is removably engaged with one of the pins 2b, and the vertical position of the headrest main body 5 is adjusted. is configured to adjustably determine.

Among the grooves 12a, 12a, 12a, and 12b, the upper grooves 12a (three in the drawing) are designed to be relatively easy to engage and disengage from the lock pin 14.
An upper inclined portion 12c, an intermediate vertical portion 12d, and a lower inclined portion 12e are successively arranged. On the other hand, the lower groove 12b has an upper inclined part 12c, an intermediate vertical part 12d, and a lower horizontal part 12f connected in this order, and when the lock pin 14 is engaged with the lower groove 12b, In addition, even if the headrest main body 5 attempts to shift upward due to an external force, the movable pole guide 10 is constantly urged by the leaf spring 15 as a spring means in the direction in which the lock pin 14 engages with the groove 12b. The lock pin 14 is in the groove 12
It is securely locked at the lower horizontal portion 12f of b, and the headrest body 5 is prevented from coming off.

The leaf spring 15 is entirely made of a spring steel plate, etc., and is disposed outside the movable pole guide 10, and has a mounting portion 15a attached to the upper support portion 8a with a rivet 17, and a guide body 10a of the movable pole guide 10. The movable pole guide 10 comes into contact with the outer circumference of the movable pole guide 10.
the outer side, that is, the lock pin 14 is in the groove 12.
a, 12a, 12a, and 12b.

16 is a support ring fixed to the lower support part 8b;
The insertion hole 1 of the movable pole guide 10 is inserted into the center hole.
The lower end portion of the guide pole 12 is inserted through the hole 0c. Therefore, with this support ring 16 and movable pole guide 10, the guide pole 12
will be supported.

With the above configuration, in a normal state, that is, in a state in which the pressing operation part 10e is not pressed, the movable pole guide 10 is moved by the plate spring 15 to lock the lock pin 1.
4 are biased in the direction of engagement with the grooves 12a, 12b of the guide pole 12, the headrest main body 5 is held at a fixed position without being displaced.

Also, the height (vertical position) of the headrest body 5
When you want to adjust the
is pressed against the spring force of the leaf spring 15,
The entire movable pole guide 10 is tilted toward the leaf spring 15 around its lower end (near the engaging grooves 10d, 10d), thereby causing the grooves 12a, 12a,
12a, 12b and the lock pin 14 are disengaged (see FIG. 5). In this state, the headrest main body 5 can be adjusted to a desired height. After that, when the pressing operation part 10e is released, the movable pole guide 10 is biased by the leaf spring 15 and returned to its original upright state, and the lock pin 14 is moved into the predetermined groove 12.
a, 12a, 12a, 12b to determine the new position of the headrest body 5.

Next, <Example 2> and <Example 3> will be described, but the same reference numerals will be used for the same components as in <Example 1>, and detailed description thereof will be omitted.

<Example 2> In this example, an extension part is continuously provided at the lower end of the movable pole guide of <Example 1>, and the support ring is omitted.

In FIGS. 6 to 8, reference numeral 41 denotes a movable pole guide, and a collar portion 41 having a pressing operation portion 41a.
b, a guide main body 41d having an engagement groove 41c that engages with the engagement hole 8c of the upper support part 8a, a cylindrical extension part 41e, and longitudinal holes 41f, 41.
f, 41g, 41g, and an insertion hole 41h through which the guide pole 12 is inserted.

The long holes 41f, 41f, 41g, and 41g are provided to facilitate tilting in the sheet width direction W by pressing the pressing operation part 41a. Elongated holes 41g, 4 facing each other in the seat front and rear direction
It is formed longer than 1g. That is, long hole 4
1f is formed across the guide body 41d and the extension part 41e from the vicinity of the contact part with the leaf spring 15 to the vicinity of the engagement part with the lower support part 8b, whereas the elongated hole 41g is formed in the extension part 41e. In part 41e,
It is formed from near the bottom of the engagement portion with the upper support portion 8a to near the engagement portion with the lower support portion 8b (a position above the elongated hole 41f).

If configured as above, the movable pole guide 4
By pressing the pressing operation portion 41a of 1 in the seat width direction W, the vertical position of the headrest main body 5 can be adjusted as in <Embodiment 1>.

<Example 3> In this example, as shown in FIG. 9, the leaf spring of <Example 1> is lengthened.

A spring locking portion 10f is formed on the lower side of the collar portion 10b of the movable pole guide 10, and the lower support portion 8b
A leaf spring 51, whose lower end is locked at a spring locking portion 8d formed by cutting a portion downward, extends upward through the engagement hole 8c of the upper support portion 8a, and is connected to the spring locking portion 8a. The upper end is locked to the stop portion 10f.

With this configuration, attachment of the leaf spring 51 becomes extremely easy, and attachment workability is improved.

Further, in the above embodiment, the concave groove is provided with an inclined part (so-called moderation), but it goes without saying that the inclined part may be replaced by only a horizontal part which is locked.

As described above, the present invention enables the vertical position of the headrest body to be adjusted by tilting the vertically long pole guide approximately horizontally using the lower part as a fulcrum, so the number of parts can be reduced. In addition to being easy to assemble and operate, the structure is simple, which reduces mutual loosening (so-called looseness) between parts, reduces noise, and stabilizes adjustment operations.

[Brief explanation of the drawing]

1 to 5 each show Example 1, and FIG. 1 is a perspective view of the entire automobile seat;
Figure 2 is a perspective view of the upper part of the seatback frame with the seat skin removed; Figure 3 is a sectional view taken along line X--X in Figure 2; Figure 4 is a cross-sectional view taken along line Y-Y in Figure 2. Figure 5 is a sectional view similar to Figure 3 when the pole guide is tilted, Figures 6 to 8 each show Example 2, and Figure 6 is a sectional view similar to Figure 3. , FIG. 7 is a sectional view taken along the Z-Z line in FIG. 6, FIG. 8 is a side view showing the mounting state of the movable pole guide, and FIG. 9 is a sectional view similar to FIG. 3 of Embodiment 3. be. 1... Car seat, 2... Seat bottom,
3... Reclining device, 4... Seat bag, 5... Headrest main body, 8... Support member,
8a...Upper support part, 8b...Lower support part, 10
...Movable pole guide, 10a...Guide body,
10b...flange, 10c...insertion hole, 10d...
Engagement groove, 10e...Press operation section, 11...Fixed pole guide, 12...Guide pole, 12a, 1
2b, 12g, 12h...concave groove, 13...sliding pole, 14...lock pin, 15...plate spring, 4
1...Movable pole guide, 41a...Press operation part, 41b...Flame part, 41c...Engagement groove, 41d
...Guide body, 41e...Extension part, 41f, 4
1g...long hole, 41h...insertion hole, 51...leaf spring.

Claims (1)

[Claims] 1 A pair of poles, one end of which is fixed to the headrest main body and the other end of which is inserted into the seat bag, a plurality of grooves formed in the side of one of the poles, and a plurality of grooves on the upper side of the seat bag frame. It is supported by a horizontally fixed support member so as to be tiltable substantially laterally with its lower part as a fulcrum, and has an insertion hole through which the one pole is inserted, and at least the upper part thereof is an elongated hole wider than the one pole. a vertically long pole guide; an engaging piece that is removably engaged with the groove of one of the poles and is integrally provided on the upper part of the pole guide; a spring means that is positioned and always biases the pole guide in a direction in which the engaging piece engages with the groove; and a pressing operation part formed on the upper part of the pole guide and on the side facing the engaging piece. By pressing the pressing operation part of the pole guide, the engagement between the engagement piece and the concave groove of the pole is released, and the headrest main body can be adjusted in the vertical direction. Automobile seat headrest vertical adjustment device.