JPH0716642U - Free hinge structure of reclining seat on one side - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the rigidity of the seat frame to prevent excessive deformation of the seat back frame in an emergency. [Constitution] Connecting rod of reclining device
14 is used as a hinge of the seat back frame 16. The arm bracket 38 of the connecting rod and the lower end 16a of the seat cushion frame are connected via a gear plate 32 having an internal gear 30 capable of meshing with the external gear 26 of the base bracket 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a free hinge structure of a one-sided reclining seat in which a seat cushion frame on the other side without a reclining device and a seat back frame are connected by a hinge.

[0002]

[Prior art]

 For example, a reclining seat in which a seat back is swingable in the front-rear direction with respect to a seat cushion via a reclining device is well known as a front seat for an automobile or the like.

The reclining device is usually provided on any one side of the seat, and the tilt angle of the seat back with respect to the seat cushion, that is, the reclining angle can be arbitrarily adjusted under the swing regulation by the reclining device. Has become.

[0004]

[Problems to be solved by the device]

 By the way, in such a so-called one-sided reclining seat, the other side without the reclining device is generally referred to as a free hinge.For example, a hinge pin is used to pivot between the seat cushion frame and the seat back frame. It's just being worn.

That is, in the known configuration, since the free hinge side is in a free state in which the free hinge side is always rotatable, the rigidity of the seat frame, that is, the rigidity of the seat frame when an excessive load acts in an emergency or the like. A reduction in the rigidity of the seat back frame with respect to the seat cushion frame is unavoidable.

Therefore, when an excessive load acts on the seat back in an emergency or the like, the seat back frame is likely to be deformed under the swing of the free hinge side, which may cause a reduction in the safety of the seated person. is there.

Here, as a structure for preventing such deformation of the seat back frame, for example, a so-called double-sided reclining seat (a double-sided lock type reclining seat) in which reclining devices are arranged on both left and right sides is known. There is. However, in the case of the reclining seats on both sides, while the rigidity of the seat back frame is improved, it is inevitable that the seat itself becomes expensive and heavy.

Further, in the case of the reclining seats on both sides, an excessive load acting on the seat back directly acts on the gears and the like of the reclining devices on both sides, so that deterioration of the gears and the like is likely to be promoted, and durability against repeated durability May be inferior to.

An object of the present invention is to provide a free hinge structure for a one-sided reclining seat that increases rigidity of a seat frame and suppresses excessive deformation of the seat back frame in an emergency.

[0010]

[Means for Solving the Problems]

 In order to achieve this object, according to the present invention, the free end of the connecting rod that is interlocked with the reclining device is pivotally supported on the free hinge side by the base bracket that integrally has the external gear, and its end is seated. The lower end of the free hinge side of the back frame is pivotally attached.

A gear plate at least partially having an internal gear capable of meshing with the external gear is arranged at a corresponding position, and one of the upper end and the lower end of the gear plate is pivotally attached to the seat back frame and the connecting plate is connected. The other pivotal connection to the arm bracket, which is integral with the shaft, allows the connecting rod and seatback frame to interlock via a gear plate.

[0012]

According to the present invention, the seat back frame is displaced with respect to the connecting rod under the action of an excessive load in the front-rear direction, and as a result of the displacement, the internal gear of the gear plate is moved to the base bracket. Since it meshes with the external gear, it is possible to prevent excessive deformation of the seat back frame.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a free hinge structure 10 for a one-sided reclining seat according to the present invention, a connecting rod 14 that interlocks with a reclining device 12 extends to a free hinge side of a seat back frame 16. It is taken out and used as a hinge (rotation center) on the free hinge side.

As shown in FIG. 2, in the seat frame 18 of a one-sided reclining seat, one side of the seat cushion frame 20 and one side of the seat back frame 16 are usually connected as a reclining side by the reclining device 12, and The side is connected to the hinge, that is, the connecting rod 14 as a free hinge side which is interlocked with the operation of the reclining device.

One end of the connecting rod 14 is, for example, integrally rotatably connected to the swing center of the arm plate 12 a of the reclining device 12, and its free end is connected to the free hinge side of the seatback frame 16. Have been extended to. Then, the free end of the connecting rod 14 is, for example, inserted into the base bracket 22 on the free hinge side and pivotally supported, the terminal 14a is inserted into the lower end 16a of the free hinge side of the seat back frame, and the terminal screw part is inserted. The lower end of the free hinge side is rotatably attached to the connecting rod by screwing the nut 24.

The base bracket 22 is fixed to a seat slide rail or the like on the side of the seat cushion frame 20, for example.

In such a configuration, the swing of the arm plate 12a with respect to the unit base 12b by the operation of the reclining device 12 and the swing of the free hinge side centering on the connecting rod (hinge) 14 following the swing, The seat back frame 16 is swung in the front-rear direction with respect to the seat cushion frame 20.

Note that the configurations of such a one-sided reclining seat and the reclining device 12 are both known, and since these configurations are not the gist of the present invention, they will not be described in detail.

Here, as can be seen from FIG. 3 in addition to FIG. 1, in the present invention, the external gear 26 is fixed to the base bracket 22 by the fixing with the rivet 28 or the like, that is, It is projected in the direction in which the lower end 16a of the seatback frame is arranged. A gear plate 32 having a partial internal gear 30 that can mesh with the external gear 26 is arranged, for example, between the base bracket 22 and the seat back frame lower end 16a.

The upper end of the gear plate 32 is pivotally attached to the seatback frame 16 by a connecting pin 34 at the lower end 16a of the seatback frame. Further, the lower end of the gear plate 32 is pivotally attached to an integral arm bracket 38 at the end of the connecting rod 14 by a pivot pin 36 formed of a rivet, for example.

In such a structure, since the lower end 16a of the seatback frame is connected to the arm bracket 38 of the connecting rod via the gear plate 32, the rotation of the connecting rod 14 accompanying the operation of the reclining device 12 is performed. Under this condition, the seat back frame 16 is swung in the corresponding direction around the connecting rod.

That is, when the reclining device 12 is operated rearward (to the right in the drawing) during normal operation of the free hinge structure 10 shown in FIG. 4 in which the external gear 26 and the internal gear 28 are not meshed, The back frame 16 is rocked together with the gear plate 32 in a corresponding direction as the connecting rod 14, that is, the arm bracket 38 is rotated, as shown in FIG. 5, for example.

Therefore, even in such a configuration, it is possible to sufficiently ensure the smooth swing of the free hinge side of the seat back following the operation of the reclining device 12.

Here, for example, when an excessive load in an emergency or the like acts as a force for swinging the seat back, that is, the seat back frame 16 in the backward direction, when acting in the direction of the solid line arrow in FIG. Only the free hinge side of the frame tries to swing backwards. At this time, in the free hinge structure 10 of the present invention, the seat back frame 16 is only operably connected to the connecting rod 14 via the gear plate 32. When a load larger than the rigidity is applied, the free hinge side of the seat back frame swings, that is, is displaced with respect to the connecting rod.

Then, when only the free hinge side of the seat back frame 16 swings with respect to the connecting rod 14 by a predetermined angle or more, the gear plate 32 causes the rivet (pivotally supported) at the lower end to swing with the swing of the seat back frame. Since it is rotated about the pin 36, the corresponding portion of the internal gear 30 of the gear plate meshes with the external gear 26, as shown in FIG.

When the internal gear 30 meshes with the external gear 26 in this manner, the subsequent swing of the gear plate 32, that is, the free hinge side of the seat back frame, is prevented, so that the external gear and the internal gear The rigidity of the seat back frame 16 with respect to the seat cushion frame 20, that is, the rigidity of the seat frame 18 after the engagement between them can be ensured to be sufficiently high.

Therefore, a large collapse of the sitting posture can be prevented in an emergency or the like, and the safety of the seated person can be surely improved.

It suffices to use the connecting rod 14 from the reclining device 12 as a hinge on the free hinge side of the seat back frame 16 and to provide an external gear 26 and an internal gear 30 which can mesh with each other on the free hinge side. Therefore, it is possible to prevent the structure of the free hinge structure 10 from becoming complicated, weighted, and expensive.

It should be noted that although the case where an excessive load is applied to the rear side has been described here, the case where the load is applied to the front side (the left side in the figure) indicated by the double-dot chain line arrow in FIG. As shown in Fig. 5, the gear plate 32 rotates around the rivet 36 at the lower end as the free hinge side of the seat back frame 16 swings forward, and the internal gear 30 of the reverse side of the gear plate 30 rotates. In this case, too, excessive deformation of the seat back frame 16 is sufficiently suppressed in the same manner as described above because the gear is meshed with the external gear 26.

Normally, the reclining device 12 uses a gear with fine teeth of about 2 °, but on the free hinge side, the free hinge of the seat back frame 16 relative to the arm bracket 38, that is, the connecting rod 14. Since the outer gear 26 and the inner gear 28 may be meshed with each other by the displacement of the side, the outer gear and the inner gear can function as teeth coarser than about 2 °.

That is, by making the external gear 26 and the internal gear 30 have coarse teeth, the rigidity of the external gear and the internal gear itself increases, so that damage to each gear during meshing can be sufficiently prevented. Moreover, since the load acting on the seat back frame 16 is distributed to the reclining side and the free hinge side, respectively, the gears of the reclining device 12 are not concentrated and the safety of the reclining device can be sufficiently ensured.

In the embodiment, the gear plate 32 is pivotally attached to the lower end 16a of the seatback frame above the connecting rod 14, and at the lower position, the gear plate and the arm bracket 38 of the connecting rod are operably connected. ing. However, the gear plate 32 need only be swingable with respect to the arm bracket 38 in accordance with the displacement of the free hinge side of the seat back frame 16, and is not limited to this. On the contrary, the gear plate 32 and the arm bracket 38 may be connected above the connecting rod 14, and the gear plate and the seat back frame lower end 16a may be connected below the connecting rod 14, respectively.

Although the free-hinge structure of the one-sided reclining seat of the present invention is suitable for the front seats of automobiles and the like, it is not limited to this, and can be applied to other seats such as trains, airplanes, and ships. The idea may be applied.

The above-described embodiments are for explaining the present invention, and do not limit the present invention in any way, and all the modifications and alterations made within the technical scope of the present invention are also applicable. It goes without saying that it is included in the invention.

[0036]

[Effect of device]

 As described above, according to the free hinge structure of the one-sided reclining seat according to the present invention, the displacement of the free hinge side of the seat back frame with respect to the connecting rod is prevented due to the meshing between the external gear and the internal gear. In an emergency, excessive deformation of the seat back frame can be sufficiently suppressed, and the rigidity of the seat frame after the external gear and the internal gear are meshed can be sufficiently high. Therefore, the collapse of the sitting posture is suppressed in an emergency and the safety of the seated person is surely improved.

Since the connecting rod from the reclining device is used as the hinge of the free hinge side and the external gear and the internal gear are provided on the free hinge side, the configuration of the free hinge structure is complicated and the weight is increased. And it does not lead to higher prices.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a free hinge structure of a one-sided reclining seat according to the present invention.

FIG. 2 is a schematic perspective view of a seat frame provided with a free hinge structure of a one-sided reclining seat.

FIG. 3 is a schematic vertical sectional view of a free hinge structure of a one-sided reclining seat.

FIG. 4 is a cross-sectional view of the free hinge structure of the one-sided reclining seat in a normal state taken along the line AA in FIG.

FIG. 5 is a cross-sectional view of a free hinge structure of a one-sided reclining seat similar to FIG. 4 at the time of normal swinging backward.

FIG. 6 is a cross-sectional view of a free hinge structure of a one-sided reclining seat similar to FIG. 4 when being displaced rearward.

FIG. 7 is a cross-sectional view of the free hinge structure of the one-sided reclining seat similar to FIG. 4 when it is displaced forward.

[Explanation of symbols]

 10 Free hinge structure of one side reclining seat 12 Reclining device 14 Connecting rod (hinge) 14a Terminal 16 Seat back frame 16a Lower end 18 Seat frame 20 Seat cushion frame 22 Base bracket 26 External gear 30 Internal gear 32 Gear plate 34 Connecting pin 36 Rivet ( Pivot pin) 38 Arm bracket

Claims (1)

[Scope of utility model registration request] 1. A space between a seat cushion frame and a seat back frame on one of the left and right sides can be swung according to an adjustment angle of a reclining device on the other side,
In the free hinge structure of a one-sided reclining seat supported by a hinge, the free end of the connecting rod that interlocks with the reclining device is pivotally supported on the free hinge side by a base bracket that integrally has an external gear, and the seat back is attached to that end. The lower end of the free hinge side of the frame is pivotally attached, and a gear plate having at least a part of an internal gear that can mesh with an external gear is arranged at a corresponding position, and the upper and lower ends of the gear plate to the seat back frame are arranged. The connecting rod and the seat back frame are linked so as to be interlockable via a gear plate by one pivotal connection of one side and the other pivotal connection to the arm bracket integral with the connecting shaft, and at least for the action of load. Free seat back due to Free hinge structure on one side reclining seat, wherein under the swing of Njisaido only that which enables mesh with the internal gear of the gear plate to the external gear of the base bracket.