JP2000333770A - Seat back frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve transverse rigidity and twisting rigidity of a seat back frame, to cope with back collision, side collision, and the like, to decrease number of parts and to simply and rapidly assemble the seat back frame and a reclining device. SOLUTION: A top frame and both side part frames 5 and 5 are integrally formed of a panel frame. A bottom part frame 7 consisting of a pipe frame is fixed between bottom ends of both side part frames 5 and 5 consisting of panel frames. A reinforcing plate 35 is fixed on the lower part of the inside of the side part frame 5. A spring hook 33 is integrally formed by bending it in such a way that it is projected outward on the end part of the reinforcing plate 35. The spring hook 33 is projected to the outside of the side part frame 5 from a hole 37 formed on the side part frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back frame, and more specifically, to a seat back frame, which is formed in a substantially rectangular frame shape from an upper frame, both side frames and a lower frame, and reclines at a lower portion of the side frame. The present invention relates to a seatback frame in which the arm side of the device is fixed, one end of a return spring is locked on the base side of the reclining device, and the other end of the return spring is locked on a spring hook provided on the side frame.

[0002]

2. Description of the Related Art Conventionally, a seat frame of a vehicle or the like uses a pipe frame or a panel frame formed by bending a pipe or the like into a substantially rectangular frame shape. When this pipe frame is used, a spring member such as an S-shaped spring is stretched over the pipe frame and covered with a pad material or a skin material. A hinge frame such as an armrest, an arm of a reclining device, and the like are fixed to a pipe frame of a seat back of the vehicle or the like by welding or the like.

As shown in FIG. 6, a seat back frame 1 is formed in a substantially quadrangular frame shape, and the seat back frame 1 is formed in a substantially inverted U-shape from an upper frame 3 and both side frames 5, 5. The lower frame 7 is fixed between the lower ends of the side frames 5, 5. The lower end of the side frame 5 is provided with a one-side lock mechanism 9 of the reclining device 21 and the like. Further, since an impact load from the left and right directions and an impact load from the front and rear directions are applied to the seat back, the static rigidity and the torsional rigidity of the seat back frame 1 are required. A horizontal rod 11 is provided for handling and reinforcement.

[0004] As shown in FIG. 8, the reclining device 21 includes a base 23 and an arm 25, and the arm 25 is fixed to the side frame 5 of the seat back frame 1.
An inner end of the return spring 31 is locked on the base 23 side, a spring hook 33 including a locking pin or the like is provided on the side frame 5 side, and an outer end 31a of the return spring 31 is locked. It has been made.

Recently, as shown in FIG. 7, a seat back frame 1 is provided by using a circular base 23 and an arm 25.
The base end 33a of the spring hook 33 composed of an L-shaped bracket is welded to the side frame 5 side of
The outer end 31a of the return spring 31 of the reclining device 21 is locked to the spring hook 33. 7 and 8, reference numeral 22 denotes a pivot shaft of the lock mechanism 9, which is connected to the operation lever of the reclining device 21 so that the locked state of the lock mechanism 9 can be released. In FIG. 7, reference numeral 35 denotes a reinforcing plate welded to the side frame 5.

[0006]

However, when an overload is applied to the conventional seat back frame 1 such as a vehicle seat at the time of a front-rear collision or a side collision, the seat back frame 1 is moved from the seat back frame 1. Is directly applied to the welded portion between the side frame 5 and the reinforcing plate 35, which causes peeling of the welded portion. When the spring hook 33 is formed from a locking pin or an L-shaped bracket, the locking pin or the L-shaped bracket must be individually welded to the side frame 5. The number of points increased, the weight increased, the assembling work became complicated, the cost increased, and the economy was lacking.

An object of the present invention is to improve the lateral rigidity and torsional rigidity of a seat back frame such as a vehicle seat, to cope with a rear collision or a side collision, etc., and to reduce the number of parts. An object of the present invention is to provide a highly economical seat back frame that can easily and quickly assemble a seat back frame and can easily and quickly assemble a reclining device.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a seat back frame according to a first aspect of the present invention comprises approximately four frames from an upper frame, both side frames, and a lower frame. It is formed in a square frame shape, and the arm side of the reclining device is fixed to the lower part of the side frame, one end of the return spring is locked to the base side of the reclining device, and the spring hook provided on the side frame side In the seat back frame in which the other end of the return spring is locked, the side frame is formed of a panel frame, a reinforcing plate is fixed to a lower portion inside the side frame, and a spring hook is formed on the reinforcing plate. Wherein the spring hook projects outside the side frame from a hole formed in the side frame. .

A seat back frame according to a second aspect of the present invention is formed in a substantially quadrangular frame shape from an upper frame, both side frames and a lower frame, and an arm of a reclining device is provided below the side frame. A seat back frame, the other end of which is fixed to a base side of the reclining device, and the other end of the return spring is locked to a spring hook provided on the side frame side. And both side frames are integrally formed from the panel frame, a lower frame formed of a pipe frame is fixed between lower ends of the side frames formed of the panel frame, and a reinforcing plate is fixed to a lower portion inside the side frame. A spring hook is formed on the reinforcing plate, and the spring hook is Characterized in that it projects outward of the side frame from the hole formed in the arm.

A seat back frame according to a third aspect of the present invention is formed in a substantially rectangular frame shape from an upper frame, both side frames and a lower frame, and an arm of a reclining device is provided at a lower portion of the side frame. A seat back frame, the other end of which is fixed to a base side of the reclining device, and the other end of the return spring is locked to a spring hook provided on the side frame side. And both side frames are integrally formed from the panel frame, a lower frame formed of a pipe frame is fixed between lower ends of the side frames formed of the panel frame, and a reinforcing plate is fixed to a lower portion inside the side frame. The spring hook is integrated with the end of the reinforcing plate so that it protrudes outward. Is formed, the spring hook, characterized in that protrudes to the outside of the side frame from a hole formed in the side frame.

According to a fourth aspect of the present invention, a seat back frame is formed in a substantially rectangular frame shape from an upper frame, both side frames and a lower frame, and an arm of a reclining device is provided at a lower portion of the side frame. A seat back frame, the other end of which is fixed to a base side of the reclining device, and the other end of the return spring is locked to a spring hook provided on the side frame side. And a side frame are integrally formed from the panel frame, a lower frame formed of a pipe frame is fixed between lower ends of the side frames formed of the panel frame, and one end of the lower frame is pivoted by a one-side lock mechanism of the reclining device. Formed on the same axis as the support shaft, and below the inside of the side frame A reinforcing plate is fixed to the reinforcing plate, and a spring hook is formed integrally with an end of the reinforcing plate so as to protrude outward, and the spring hook extends from a hole formed in the side frame to the outside of the side frame. It is characterized by protruding.

According to the seat back frame of the first aspect of the present invention, the side frame is formed of a panel frame, a reinforcing plate is fixed to a lower portion inside the side frame, and a spring hook is attached to the reinforcing plate. Are formed and the spring hooks protrude from the holes formed in the side frames to the outside of the side frames, so that the strength can be improved. There is no need to weld to the part frame, the number of components can be reduced, the work of assembling the seat back frame can be performed simply and quickly, and the reclining device can be simply and quickly mounted.

According to the seat back frame of the second aspect of the present invention, the upper frame and the both side frames are integrally formed from the panel frame, and the upper frame and the both side frames are formed from the pipe frame between the lower ends of the both side frames composed of the panel frame. The lower frame is fixed, a reinforcing plate is fixed to a lower portion inside the side frame, a spring hook is formed on the reinforcing plate, and the spring hook is formed outside the side frame through a hole formed in the side frame. , So that the strength of the seat back frame can be improved, and there is no need to individually weld the locking pins and L-shaped brackets to the side frames, thereby reducing the number of parts. The work of assembling the seat back frame can be performed simply and quickly, and further the reclining device can be simply and quickly mounted.

According to the seat back frame of the third aspect of the present invention, the upper frame and the both side frames are integrally formed from the panel frame, and the upper frame and the both side frames are formed from the pipe frame between the lower ends of the both side frames composed of the panel frame. The lower frame is fixed, a reinforcing plate is fixed to a lower portion inside the side frame, and a spring hook is formed integrally at an end of the reinforcing plate so as to protrude outward, and the spring hook is integrally formed. Since it protrudes from the hole formed in the side frame to the outside of the side frame, the strength of the seat back frame can be improved, and the locking pins and L-shaped brackets are individually welded to the side frame. The number of parts can be reduced, the work of assembling the seat back frame can be performed easily and quickly, and the reclining device It can be assembled easily and quickly.

According to the seat back frame of the present invention, the upper frame and the both side frames are integrally formed from the panel frame, and the upper frame and the both side frames are formed from the pipe frame between the lower ends of the both side frames composed of the panel frame. A lower frame is fixed to the lower frame, one end of the lower frame is formed on the same axis as the pivot shaft of the one-side lock mechanism of the reclining device, and a reinforcing plate is fixed to a lower portion inside the side frame, and the reinforcing plate is fixed. A spring hook is formed integrally with the end of the seat back frame so as to protrude outward, and the spring hook projects outside of the side frame from a hole formed in the side frame. It is not necessary to weld the locking pin or L-shaped bracket individually to the side frame, and the number of parts is reduced. So it can be, the assembling work of the seat back frame easily and quickly carried out, it can be further assembling the reclining device quickly simple.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat back frame according to the present invention will be described below with reference to the drawings. 1A and 1B show a seat back frame according to the present invention, wherein FIG. 1A is a partial front view, and FIG. 1B is a side view. FIG.
FIG. 3 is a partially enlarged side view of the seat back frame, FIG. 3 is a partial perspective view showing the seat back frame, and FIGS. 4 and 5 are cross-sectional views of the reclining device. 8 are described with the same reference numerals.

The seat back frame 1 is formed in a substantially rectangular frame shape from the upper frame 3, the side frames 5, 5 (only one is displayed) and the lower frame 7, and the lower portion is provided between the side frames 5, 5. Horizontal rod 11a and upper horizontal rod 11b
Is provided. The lower horizontal rod 11a and the upper horizontal rod 1
1b is formed so that its upper and lower sides are bent toward the side facing each other, and has a substantially U-shaped cross section.

The upper frame 3 and both side frames 5,
Reference numeral 5 denotes a substantially inverted U-shape integrally formed from the panel frame. As shown in FIG. 2 and FIG. 3, recesses 13 are respectively formed in lower portions of one of the side frames 5, 5.
Both ends of the lower horizontal rod 11a are fixed to the recess 13 by bolts 15 and nuts 16 in a state fitted respectively. In addition, the upper horizontal rod 11b is also fixed to the concave portion 14 on one side of the side frames 5, 5 by bolts 15 and nuts 16.

A lower frame 7 composed of a pipe frame is fixed between the lower ends of the side frames 5 and 5.
One end of the lower frame 7 is formed on a pivot 22 of the one-side lock mechanism 9 of the reclining device 21. The reclining device 21 includes a base 23 and an arm 25, and the seat back frame 1 is fixed to the arm 25 by bolting, welding, or the like.

As shown in FIG. 4, the seat back frame 1 to which the arm 25 of the reclining device 21 is fixed.
A reinforcing plate 35 is fixed to a lower portion inside the side frame 5 by spot welding or the like, and a spring hook 33 is formed integrally with the reinforcing plate 35.

The spring hook 33 is bent so as to protrude outside the side frame 5 from a hole 37 formed in the side frame 5. The spring hook 33 is formed to have a substantially U-shaped cross section, a ridge 33a for reinforcement is formed at the bottom, and a notch 33b is formed at the side.

Outer end 31 of the return spring 31
a is locked to the spring hook 33 through a notch 33b of the spring hook 33 protruding outside the side frame 5. One end of the lower frame 7 is formed on the same axis as the pivot 22 of the one-side lock mechanism 9 of the reclining device 21.

As shown in FIG. 5, a gap 39 is formed between a hole 37 of the side frame 5 into which the spring hook 33 is inserted and both sides 33c of the spring hook 33. When a large load is applied to the seat back by the gap 39, the seat back frame 1 is deformed, and the spring hooks 33 interfere with the side frames 5, so that the load can be dispersed. Load on the welded portion formed by spot welding of the reinforcing plate 35 and the like can be reduced.

[0024]

The above is the embodiment of the seat back frame according to the present invention. According to the seat back frame according to the first aspect of the present invention, the side frame is formed from the panel frame, and the side frame is formed from the panel frame. A reinforcing plate is fixed to a lower portion inside the frame, and a spring hook is formed on the reinforcing plate. The spring hook projects from a hole formed in the side frame to the outside of the side frame, so that strength is improved. It is not necessary to individually weld the locking pins and L-shaped brackets to the side frames, the number of parts can be reduced, and the work of assembling the seat back frame can be performed simply and quickly. Further, the reclining device can be easily and quickly assembled.

According to the seat back frame of the present invention, the upper frame and the both side frames are integrally formed from the panel frame, and the upper frame and the both side frames are formed between the lower ends of the both side frames composed of the panel frame from the pipe frame. The lower frame is fixed, a reinforcing plate is fixed to a lower portion inside the side frame, a spring hook is formed on the reinforcing plate, and the spring hook is formed outside the side frame through a hole formed in the side frame. , So that the strength of the seat back frame can be improved, and there is no need to individually weld the locking pins and L-shaped brackets to the side frames, thereby reducing the number of parts. The work of assembling the seat back frame can be performed simply and quickly, and further the reclining device can be simply and quickly mounted.

According to the seat back frame of the third aspect of the present invention, the upper frame and the both side frames are integrally formed from the panel frame, and the upper frame and the both side frames are formed from the pipe frame between the lower ends of the both side frames composed of the panel frame. The lower frame is fixed, a reinforcing plate is fixed to a lower portion inside the side frame, and a spring hook is formed integrally at an end of the reinforcing plate so as to protrude outward, and the spring hook is integrally formed. Since it protrudes from the hole formed in the side frame to the outside of the side frame, the strength of the seat back frame can be improved, and the locking pins and L-shaped brackets are individually welded to the side frame. The number of parts can be reduced, the work of assembling the seat back frame can be performed easily and quickly, and the reclining device It can be assembled easily and quickly.

According to the seat back frame of the present invention, the upper frame and the both side frames are integrally formed from the panel frame, and the upper frame and the both side frames are formed from the pipe frame between the lower ends of the both side frames composed of the panel frame. A lower frame is fixed, one end of the lower frame is formed on the same axis as the pivot shaft of the one-side lock mechanism of the reclining device, and a reinforcing plate is fixed to a lower portion inside the side frame. A spring hook is formed integrally with the end of the seat back frame so as to protrude outward, and the spring hook projects outside of the side frame from a hole formed in the side frame. It is not necessary to weld the locking pin or L-shaped bracket individually to the side frame, reducing the number of parts So it can be, the assembling work of the seat back frame easily and quickly carried out, it can be further assembling the reclining device quickly simple.

According to the present invention, the lateral rigidity and torsional rigidity of a seat back frame such as a vehicle seat can be improved, a rear collision or a side collision can be dealt with, and the number of parts can be reduced. Thus, the seat back frame can be easily and quickly assembled, and the reclining device can be easily and quickly assembled.

[Brief description of the drawings]

FIG. 1 shows a seat back frame according to the present invention, in which (a) is a partial front view and (b) is a side view.

FIG. 2 is a partially enlarged side view of a seat back frame according to the present invention.

FIG. 3 is a partially enlarged perspective view of a seat back frame according to the present invention.

FIG. 4 is a partial cross-sectional view of a seat back frame reclining device according to the present invention.

FIG. 5 is a plan view of a spring hook of the seat back frame reclining device according to the present invention.

FIG. 6 is a perspective view of a seat back frame of a conventional vehicle seat.

FIG. 7 is a partial cross-sectional view of a conventional reclining device for a seat back frame of a vehicle seat.

FIG. 8 is a side view of a conventional reclining device for a seat back frame of a vehicle seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat back frame 3 Upper frame 5 Side frame 7 Lower frame 9 Lock mechanism 11a Lower horizontal rod 11b Upper horizontal rod 13 Depression 14 Depression 15 Bolt 16 Nut 21 Reclining device 22 Pivot shaft 23 Base 25 Arm 31 Return spring 31a Outside end 33 Spring hook 33a Ridge 33b Notch 33c Side 35 Reinforcement plate 37 Hole 39 Gap

Claims (4)

[Claims] 1. An arm frame of a reclining device is formed in a substantially rectangular frame shape from an upper frame, both side frames and a lower frame, and an arm side of a reclining device is fixed to a lower portion of the side frame.
In a seatback frame in which one end of a return spring is locked on a base side of the reclining device and the other end of the return spring is locked on a spring hook provided on the side frame side, the side frame is a panel frame. And a reinforcing plate is fixed to a lower portion inside the side frame, a spring hook is formed on the reinforcing plate, and the spring hook projects outside of the side frame from a hole formed in the side frame. A seat back frame. 2. An arm frame of a reclining device is formed in a substantially rectangular frame shape from an upper frame, both side frames and a lower frame, and an arm side of a reclining device is fixed to a lower portion of the side frame.
In a seat back frame in which one end of a return spring is locked on a base side of the reclining device and the other end of the return spring is locked on a spring hook provided on the side frame side, the upper frame and the both side frames Are integrally formed from a panel frame, a lower frame formed of a pipe frame is fixed between lower ends of both side frames formed of the panel frame, and a reinforcing plate is fixed to a lower portion inside the side frame. A seat back frame, wherein a spring hook is formed on the side frame, and the spring hook projects from a hole formed in the side frame to the outside of the side frame. 3. An arm frame of a reclining device is formed in a substantially rectangular frame shape from an upper frame, both side frames and a lower frame, and an arm side of a reclining device is fixed to a lower portion of the side frame.
In a seat back frame in which one end of a return spring is locked on a base side of the reclining device and the other end of the return spring is locked on a spring hook provided on the side frame side, the upper frame and the both side frames Are integrally formed from a panel frame, a lower frame formed of a pipe frame is fixed between lower ends of both side frames formed of the panel frame, and a reinforcing plate is fixed to a lower portion inside the side frame. A seat, wherein a spring hook is formed integrally with the end of the seat so as to protrude outward, and the spring hook projects from a hole formed in the side frame to the outside of the side frame. Back frame. 4. An arm frame of a reclining device is formed in a substantially quadrangular frame shape from an upper frame, both side frames and a lower frame, and an arm side of a reclining device is fixed to a lower portion of the side frame.
In a seat back frame in which one end of a return spring is locked on a base side of the reclining device and the other end of the return spring is locked on a spring hook provided on the side frame side, the upper frame and the both side frames Are integrally formed from a panel frame, and a lower frame formed of a pipe frame is fixed between lower ends of both side frames formed of the panel frame, and one end of the lower frame is the same as a pivot shaft of a one-side lock mechanism of the reclining device. A reinforcing plate is fixed to an inner lower portion of the side frame, and a reinforcing hook is formed integrally with an end of the reinforcing plate so as to protrude outward. Is projected from a hole formed in the side frame to the outside of the side frame. Back frame.