JPS646133Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seat, and more particularly, to a seat in which the back body is supported with respect to the seat body so that the angle thereof can be changed.

In general, this type of seat chair has a back frame pivotably connected to a seat frame, the seat frame and the back frame each covered with a cushion material, and the cushion material is made of fabric sewn into a bag shape. Since the seat body and the back body are each constituted by wrapping the body with As a result, the back body cannot be reliably folded onto the seat body, and as a result, it is necessary to take up a large storage space for the chair.

The present invention was devised in view of these problems, and its purpose is to make it possible to fold the back body, which has cushioning material attached to the back frame, against the seat body, which has cushioning material attached to the seat frame. To provide a seat chair which can be stored even in a narrow space and whose back body will not be folded inadvertently during use.

That is, the present invention includes a seat frame and a back frame that is swingable relative to the seat frame,
In this seat chair in which the swinging position of the back frame relative to the seat frame can be locked, a connecting rod of a predetermined length is connected to the reclining member connected to the seat frame, and the connecting rod is connected to the reclining member. The back frame is swingably supported between an upright position in which it stands up in the same direction as the connection rod and a folded position in which it lies down toward the seat frame with respect to the connection rod, and the connection rod of the back frame The present invention is characterized in that a holding mechanism is provided on the support portion for holding the back frame in the upright position and allowing the back frame to swing to the folded position by an external force other than the holding force.

Embodiments of the chair according to the present invention will be described below based on the drawings.

In the figure, 1 is a seat frame formed by bending a pipe material into a U-shape, 2 is a back frame similarly formed, and a connecting rod 4 having a predetermined dimension is connected to the seat frame 1 as an existing reclining member. 3, the back frame 2 is pivotally connected to the upper end of the connection rod 4, and the back frame 2 is placed in an upright position in the same direction as the connection rod 4; 4, it is supported so as to be swingable to a folded position where it lies down.

Then, the seat frame 1, the back frame 2, and the connection rod 4 are covered with a cushion material 5 made of, for example, foamed urethane, and the cushion material 5 is wrapped in a cover 6 sewn into a bag shape. 7 and a back body 8, respectively.

The support structure for the connecting rod 4 of the back frame 2 is as shown in FIGS. 3 to 5.
A shaft portion 10 having a cut groove 9 and a through hole 1 from the shaft portion 10
A connecting member 15 integrally formed with a supporting portion 14 consisting of side walls 12, 12 and a back wall 13 having numbers 1 and 11.
is separately formed, and the shaft portion 10 of the connection member 15
is inserted into the lower end of the back frame 2, while
Through holes 20, 2 provided near the upper end of the connecting rod 4
0 and the through holes 11, 11 provided in the side walls 12, 12
The back frame 2 is connected to the connection rod 4 by inserting a pin 22 having a head 21 into each of the through holes 11, 11 and 20, 20 and caulking the insertion end of the pin 22. be supported by
Further, when the back frame 2 is erected relative to the connection rod 4, the back wall 13 of the support portion 14 and the connection rod 4
The contact with the upper end portion allows the back frame 2 to swing only toward the seat frame 1 with respect to the connecting rod 4.

Further, an engagement groove 1 is formed on the inner side of the side walls 12, 12 of the support portion 14 along the length direction of the support portion 14.
6 and 16 are provided, and when the back frame 2 is erected with respect to the connection rod 4, the connection rod 4 is engaged with the engagement grooves 16, 16, so that the back frame 2
This is done to maintain the upright position.

Further, 23 and 23 are spring washers inserted into the pin 22 on the outside of the support portion 14, and 24 and 24 are holding members.

The chair of the present invention is constructed as described above.
When using the chair, the back body 8 is swung upright at a desired angle with respect to the seat body 7,
At this time, the rearward swinging of the connecting rod 4 is stopped by the reclining member 3, and due to the engagement of the connecting rod 4 with the engaging grooves 16, 16, The upright state of the back body 8 can be maintained. Furthermore, when the chair is not in use, the chair is stored in a storage space by folding the back body 8 against the seat body 7. When folding, first the back frame 2 swings together with the connecting rod 4, and when the swinging of the connecting rod 4 is stopped by the reclining member 3, the swinging of the back frame 2 causes the support part 14 to swing. side wall 1
2 and 12 are pushed outward, and the connecting rod 4
The state of engagement with the engagement grooves 16, 16 is released, and the back frame 2 swings toward the seat frame 1 with respect to the connection rod 4. That is, the connecting rod 4 is pivotally connected to the reclining member 3 connected to the seat frame 1, and the back frame 2 is swingably supported on the upper end of the connecting rod 4. Since the pivot point of the back frame 2 relative to the seat frame 1 can be positioned above the seat frame 1, the cushion material 5 of the back body 8 is in contact with the cushion material 5 of the seat 7. As shown in FIG. 2, the back body 8 can be folded so as to come into close contact with the seat body 7 without any problems.

As explained above, the seat chair according to the present invention includes the reclining member connected to the seat frame.
A connecting rod of a predetermined length is connected to the connecting rod, and the back frame is placed on the connecting rod in an upright position in which it stands up in the same direction as the connecting rod, and in a folded position in which it lies down toward the seat frame with respect to the connecting rod. At the same time, the back frame is held in the upright position by a support portion of the back frame to the connecting rod, and is swingable to the folded position by an external force other than this holding force. By providing the holding mechanism, the swinging fulcrum of the back frame relative to the seat frame can be positioned above the seat frame by the connecting rod, so that when the seat is not in use, When the back body is folded with respect to the seat body, the cushion material of the back body does not come into contact with the cushion material of the seat body, and the back body is folded so as to be in close contact with the seat body. This makes it possible to store the chair even in a narrow space, and the back body, which stands up in the same direction as the connecting rod, can maintain its upright state due to the action of the holding mechanism. This prevents the back body from falling down carelessly, and the angle of the back body relative to the seat body can be adjusted while maintaining the upright position of the back body, making it easier to handle and folding when storing. When folding, an external force is applied to the back body in the direction of folding it down toward the seat body, whereby the holding mechanism of the connecting rod is released and the back body can be easily folded down.

[Brief explanation of the drawing]

The drawings show an embodiment of the chair according to the present invention. Figure 1 is a side view of the chair, Figure 2 is a side view of the chair in a folded state, and Figure 3 is a connection rod. FIG. 4 is a partially cutaway front view showing the support structure of the back frame, FIG. 4 is a side view of the same, and FIG. 5 is a sectional view taken along the line -- in FIG. 3. 1... Seat frame, 2... Back frame, 3
... Reclining member, 4 ... Connection rod, 7 ...
Sitting body, 8... Back body.

Claims (1)

[Scope of utility model registration request] a reclining member 3 that is capable of swinging the back frame 2 relative to the seat frame 1 and locking the swing position of the back frame 2 relative to the bottom frame 1; A connecting rod 4 of a predetermined length is connected to the reclining member 3 connected to the seat frame 1, and the back frame 2 is connected to the connecting rod 4. The supporting portion of the back frame 2 to the connecting rod 4 is swingably supported in an upright position standing in the same direction as the connecting rod 4 and a folding position in which the connecting rod 4 is collapsed toward the seat frame 1 side. The seat chair is further provided with a holding mechanism that holds the back frame 2 in the upright position and allows the back frame 2 to swing to the folded position using an external force other than the holding force.