JPH0311766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a seat apparatus, and more specifically, a headrest provided at the upper part of the backrest that reclines in the front and back direction in response to the reclining operation of the backrest. Relating to an actuated seat device.

There are various conventional reclining mechanisms for reclining the backrest of a seat. For seats that recline and have a headrest attached to the backrest, as the seat reclines, the seater's head position changes, so it is desirable that the headrest position also changes. There is no way for the headrest position to change appropriately in response to the reclining operation of the headrest.

An object of the present invention is to attach an engaging member to the upper end of the support member via a connecting member, and to operate the engaging member via the support member in response to the reclining operation of the backrest. The object of the present invention is to provide a seat device in which a headrest attached to the upper end of a backrest is actuated via an engaged member, and the headrest is rotated in accordance with the operating position of the backrest.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

1 to 3 show an embodiment of the present invention, and in these figures, this seat device has a support shaft 30 at the rear end of a seat frame 1 constituting a seat.
The back frames 2, 2' are rotatably attached to the back frames 2, 2'. A pair of left and right support members 6, 6 are provided between the left and right sides of the back frames 2, 2' and a pair of left and right seat side frames 3, 3' forming the left and right sides of the seat frame 1, respectively. ' is attached, and this support member 6,
Both upper ends of 6' are integrally attached and connected by a connecting member 9, and are rotatably attached to back frames 2, 2'. Further, both lower ends of the support members 6, 6' are connected by an interlocking member 7, and this interlocking member 7 is a pair of elongated horizontally formed on the seat side frames 3, 3' in the front and back direction of the seat. The guide holes 3a, 3a' are inserted into the guide holes 3a, 3a', and the guide holes 3a, 3a' are slidable therein. A reclining device 4 is attached to the lower end of one of the support members 6.
Further, a rack 11 is provided on the side of the corresponding guide hole 3a with which a locking tooth 16a of a locking lever 16, which will be described later, provided on the reclining device 4 engages.
is provided. Further, in this seat device, a headrest 35 is rotatably attached to a headrest support member 36 attached between the upper ends of the back frames 2, 2'. This head rest 3
A mounting rod 37 connects the engaged member 3 to the lower end of the member 5.
8 are attached together. This engaged member 3
As can be clearly seen from FIGS. 2 and 3, engaged teeth 38a are formed at the lower end of the engagement member 39 having engagement teeth 39a that engage with the engaged teeth 38a. It is integrally attached to member 9.

The details of the reclining device 4 and the rack 11 are shown in FIGS. 4 and 5.
That is, the reclining device 4 includes an inverted L-shaped reclining operating lever 5 that is rotatably attached to the center of the base plate 12 by a rotation shaft 13, and a reclining operation lever 5 that is rotatable by a support shaft 17 at the lower part thereof. A pin 15 is fixed at the tip of one arm 5a extending downwardly of the operating lever 5, and this pin 15 is attached to the upper edge of the locking lever 16. (in the state shown in FIG. 4a), and prevents the locking lever 16 from being pulled upward by the tensioning force of the spring 20. Further, a handle 14 is provided at the tip of the other arm 5b of the lever 5.
is attached, and a spring 23 is applied to the pin 22 provided in the middle of the other arm 5b, so that the pin 15 provided on the one arm 5a of the operating lever 5 is always engaged with the locking lever. It abuts on the upper edge of 16. Further, mounting holes 12a and 12b are formed near both left and right ends of the lower part of the base plate 12, and screws 24 and bushes 25 are mounted to these through guide holes 3a as shown in FIG. The reclining device 4 is slidable along the guide hole 3a. A rack 11 is attached to the side of the guide hole 3a as shown in FIG. 5, and the locking teeth 16a of the locking lever 16 provided on the reclining device 4 mesh with the rack 11, allowing the reclining device to recline. The slide of device 4 is locked. However, the spring 2
When the locking lever 16 is rotated in the direction shown by the arrow 31 (FIG. 4) against the pressure 3 to reach the state shown in FIG. The locking teeth 16a move upward and are disengaged from the rack 11, allowing the reclining device 4 to slide. Although not shown in detail in the figures, the lower end of the support member 6 connected by the interlocking member 7 is connected to the reclining device 4 by appropriate means as shown in FIGS. 4 along with the guide hole 3a.

Next, the operation of the seat device configured as described above will be explained.

First, in the state shown in FIG. 1, that is, in the side view and in FIG.
1 and slide the support members 6, 6';
Furthermore, when the reclining operation of the back frames 2, 2' is locked and fixed, if the reclining operation lever 5 is operated upward as described above in FIG. 4b, the locking lever 16 is moved as shown in the figure. The locking teeth 16a are easily activated.
1, the reclining device 4 and support members 6, 6' are disengaged from the guide hole 3.
It becomes possible to slide along a and 3a'. At this time, when the support members 6, 6' are slid and the backrest portions, that is, the back frames 2, 2' are reclined, the connecting member 9 is connected to the support members 6, 6'.
Since it is integrally attached to the support members 6, 6', it rotates in response to the sliding movement of the support members 6, 6', and the engagement member 39 also rotates in the same manner. As a result, the head rest 35 is rotationally driven via the engaged member 38 engaged with the engaging member 39, and when the backrest is in the upright state as shown in FIG. will come forward and stand up,
Further, when the backrest becomes flat as shown in FIG. 3, the headrest 35 also operates to become horizontal with respect to the seat.

When the above-mentioned operation of the reclining operating lever 5 is stopped, the reclining operating lever 5 returns to the state shown in FIG. Return to the state shown in Figure 4 a, and lock the locking teeth 1.
6a is engaged with the rack 11, and the support member 6,
6' is locked, and the headrest 35 is fixed in an inclined state matching the inclination of the support members 6, 6', that is, the backrest portion.

Further, in the above embodiment, the spring 32 is applied between the front part of the seat frame 1 and the interlocking member 7 that connects the lower end parts of the support members 6, 6', and the reclining operation lever 5 is operated. When the support members 6, 6' become slidable,
By pulling the support members 6, 6' forward, the backrest is urged to tilt forward. In this case, the backrest part is connected to its spring 3
2 to the rear, the state shown in FIG. At this point, the backrest portion automatically rises forward and the headrest 35 automatically rotates and stands up, resulting in the state shown in FIG.

As explained above, according to the present invention, a headrest that operates in conjunction with the movement of the support member is provided at the upper part of the backrest, and this headrest moves forward and stands up when the backrest is in the upright state. When the backrest slides, it operates so that it lies flat against the seat, and the headrest fits appropriately over the head of the seater.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the internal structure of a seat device according to an embodiment of the present invention, FIGS. 2 and 3 are side views showing the operating state of FIG. 1, and FIGS. FIG. 5 is a side view showing the function of the reclining device in the seat apparatus of the invention, and FIG. 5 is an exploded perspective view of the reclining device shown in FIG. 4. 1... Seat frame, 2, 2'... Back frame, 3, 3'... Seat side frame, 3a,
3a'... Guide hole, 4... Reclining device, 6, 6'... Support member, 7... Interlocking member,
9... Connection member, 35... Head rest, 36...
...Headrest support member, 38...Engaged member,
39...Engagement member.

Claims (1)

[Scope of Claims] 1. A seat frame 1 constituting a seat; a back frame 2 having a lower end rotatably attached to the rear end of the seat frame 1 and constituting a backrest;
2', which constitutes the seat frame 1, and has a pair of left and right seat side frames 3, 3' provided on the left and right sides thereof, each of which has a horizontally elongated shape in the front-rear direction of the seat. The pair of formed guide holes 3a, 3a', the upper end portions are rotatably attached to the left and right sides of the back frames 2, 2', and the lower end portions are connected by an interlocking member 7, and the pair of guide holes 3a, 3a' A pair of left and right support members 6, 6' are slidably attached to the guide holes 3a, 3a' along the length direction of the guide holes 3a, 3a'.
a connecting member 9 integrally attached between the upper ends of the pair of support members 6, 6', and a support member integrally attached to the connecting member 9; 6, 6' slide along the guide holes 3a, 3a' to connect the engaging member 39, which rotates together with the connecting member 9, with the upper ends of the left and right sides of the back frames 2, 2'. a head rest support member 36 attached between both upper ends of the head rest support member 36; a head rest 35 attached to the head rest support member 36; Engagement member 3
9, the engaged member 38 rotates the head rest 35 according to the operating position of the back frames 2, 2'. 2. A rack 11 provided on one or both sides of the pair of guide holes 3a, 3a' along the length of the guide holes 3a, 3a'; and one or both of the support members 6, 6'. a locking lever 16 having locking teeth 16a provided at the lower end of the locking lever 16 and engaging with the rack 11 to lock the sliding movement of the support members 6, 6'; and a locking tooth 16a of the locking lever 16. and the rack 11, and the support member 6,
2. The seat device according to claim 1, further comprising operating means for making the lower end of the seat 6' slidable along the guide holes 3a, 3a'.