KR20070110488A - Seat back frame of seat for automobile - Google Patents

Abstract

A seat back frame of a seat for an automobile, comprising a frame base structure (2) having an upper frame (52), a pair of right and left side-brackets (53, 54), and a lower cross frame (55) and standard structures (3A, 3B) formed by fixing the rear face of a panel body (7) to a pair of right and left center pipes (4a, 4b) of a center support body (4) with a prescribed height dimension and a side view shape. The panel body is formed by extending, to a prescribed dimension, right and left side-support panels (7b, 7c) from the lateral both ends of the center panel (7a) to a forward diagonal outer side. Since the frame base structure (2) is integrated with the standard structures (3A, 3B), a specified seating performance can be provided even if the seat back frame is applied to any vehicle model by assembling shared standard structures to the base structure in a main configuration forming the outer peripheral skeleton of an existing frame.

Description

Seat back frame of car seat {SEAT BACK FRAME OF SEAT FOR AUTOMOBILE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back frame forming a frame of a seat back of an automobile seat, and more particularly to a frame of a main structure of an outer frame of an existing seat back frame used in various vehicle models. The present invention relates to a seat back frame having a structure in which seating performance can be improved in any vehicle model by integrating and combining a standard structure common to the frame basic structure.

As shown in Fig. 10, the front seat (driver's seat and passenger seat) 40 of the vehicle is a reclining adjuster at the rear end of the seat cushion 41 in which the occupant H sits down. The seat back 43 is mounted so that the seat back 43 can be reclined via the mechanism 42, and a head rest 44 is attached to the upper end of the seat back 43.

9 is a perspective view showing the general structure of the seat frame 45 serving as the skeleton of the front seat 40. The seat frame 45 is composed of a seat cushion frame 46 forming a frame of the seat cushion 41 of FIG. 10 and a seat back frame 47 forming a frame of the seat back 43. The seat cushion frame 46 has a left side frame 48 and a right side installed in parallel with each other at intervals in the left and right (L-Ri) directions as viewed from the front side (F) in the arrangement along the front and rear direction FR of the vehicle. Both cross sections are secured by means of welding or the like, respectively, across the frame 49 and between the front (F) side ends and the rear (R) side ends with respect to both side frames (48, 49). It is provided with the front cross member 50 and the rear cross member 51, and is comprised in the rectangular frame shape by planar view.

In addition, the seat back frame 47 includes an upper frame 52 formed by bending a metal pipe in a substantially inverted U shape, and a pair of left and right side brackets 53 connected to both ends of the upper frame 52. 54 and a lower cross frame 55 for reinforcement in which both ends are fixed by means of welding or the like in an arrangement intersecting between the lower end portions of each of the side brackets 53 and 54, respectively. And an electric wire 56 mounted across the upper end portions of the both side brackets 53 and 54 and disposed between the middle portions of the both side brackets 53 and 54 so as to be impacted from the front. It is comprised with four S springs 57 which absorb and relieve water. In addition, two headrest mounting brackets 58 on which the headrest 44 of FIG. 10 is mounted are fixed to the upper part of the upper frame 52 by welding. In addition, depending on the vehicle model, a contour matt may be used in place of the S spring 57.

However, in the conventional front seat 40, there exist many things which cannot be said that a seating performance is good, for example, because of the various manufacturing restrictions, such as saving of a cost and common parts for each vehicle model. For example, in the seat back frame 47, in the case of the headrest split type in which the headrest 44 of the separate member is mounted as shown in FIG. 10, the upper frame (or upper cross member depending on the vehicle model). There is a slight lack of frame height H _F2 to the upper end to which the headrest mounting bracket 58 is fixed at) 52 than the minimum height dimension needed to obtain good seating performance. In the seat back frame 47 that lacks the frame height H _F2 , the mounting height of the head rest 44 is determined according to the mounting position of the head rest mounting bracket 58, which may cause a significant deterioration in seating performance. It may be. In addition, for example, in the case of rear collision by a subsequent vehicle, when the seat back 43 is inclined backward, the lack of the height dimension reliably restrains the waist to the head of the occupant H. Can not.

Moreover, even if the S spring 57 and the wire 56 which are occupant support parts in the seat back frame 47 shown in FIG. Difficult to keep firmly in posture. That is, as shown in Figure 10, the human spine (Hs) has an S-shaped curve when viewed from the side, from an ergonomic point of view, when viewed from the side, the spine of the occupant (H) (w) It is necessary to support the occupant H in a sitting position where Hs) can always be maintained in an S-curve shape. However, since the S spring 57 or the wire 56 has elasticity that always deforms in response to a load caused by vibration during driving of the vehicle, even when the mounting position or structure is improved, the occupant H is placed in the seated position described above. Difficult to maintain

Moreover, in the conventional seat back frame 47, the protruding length D2 from the S spring 57 in both side brackets 53 and 54 to the front with respect to the support performance of the left-right direction important for dynamic evaluation at the time of driving ( 10 is largely lacking. In the side brackets 53 and 54 lacking the protruding length D2, it is impossible to reliably suppress the skew or shaking of the upper body of the occupant H, thereby stressing the occupant's spine Hs and the muscles around it. do. Therefore, in the past, the pads to be mounted on both side brackets 53 and 54 in a state of covering them are formed by forming a part of the relatively rigid member so as to move forward. A seat back is also proposed to make up for the shortage of the protruding length D2. However, in the structure in which the side support performance of both the left and right sides by such a pad is acquired, a pad will deform gradually as it receives the load from the occupant H repeatedly, and it cannot continue to maintain required support performance.

In addition, since the seat back frame 47 employs an occupant support part that elastically deforms, such as the S spring 57 and the wire 56, the posture of the occupant H is disturbed due to long-term fatigue. When starting to lose, the occupant H cannot be supported so that the initial ideal sitting position is not disturbed.

On the other hand, if the problem of seating performance as described above is found, for example, the auxiliary panel for improving seating performance having a desired shape designed for each vehicle type is attached, or in a sports type vehicle, the dashed-dotted line in Fig. 9 is shown in Fig. 9. As shown in the drawing, a method of mounting and modifying the side support wires 59 by welding on both sides of the seat back frame 47 is also attempted. However, there is a problem in that the correction means for installing the dedicated modified parts for each vehicle type takes a long time to develop and at the same time increases the cost.

Accordingly, the present invention has been made in view of the above-described conventional problems, and a main structure constituting the outer frame in each seat back frame of various existing vehicle models is used as a frame base structure, and a common standard specification structure is assembled to the frame base structure. It is an object of the present invention to provide a seat back frame for an automobile seat which can obtain desired seating performance even when applied to any vehicle model, by merely integrating it.

In order to achieve the above object, the seat back frame of the automobile seat of the present invention is a frame consisting of an upper frame constituting the outer frame, a pair of left and right side brackets and a lower cross frame At least a pair of left and right center pipes having a basic structure, a height dimension capable of supporting the waist to the head of the human body, and a shape capable of supporting the upper body of the human body in a desired sitting position when viewed from the side. The left and right side support panels are inclined forwardly at predetermined dimensions toward the outside at the left and right ends of the center panel having a center support and a shape capable of supporting a portion from the lumbar spine of the spine of the human body to the desired sitting posture. The center is provided at the bottom of both center pipes while having a panel body extending. The rear surface of the null has a standard specification structure formed by being fixed, and the pair of center pipes are arranged in the upper frame so as to face each other in a state in which the upper end protrudes from the upper frame by a predetermined length, and further, Each lower end of the pair of center pipes is fixed to a lower cross frame, and the frame base structure and the standard specification structure are integrated.

With such a configuration, the mounting position of the headrest can be supplemented by the height of the center pipe on the left and right of the center supporter and set to a desired value regardless of the lack of the seat height dimension of the existing upper frame in the frame basic structure. The center panel of the panel body supports the part of the human spine from the lumbar spine to the pelvis in the desired sitting position, so that the ideal seating performance can be obtained, and also using the elastically deformed occupant support parts such as the existing S spring or wire. Alternatively, the center panel can be integrally supported in a good sitting position. As a result, in the automobile seat using this seat back frame, the occupant always maintains a good seating posture while forcibly suppressing the disturbance in the posture of the occupant due to fatigue caused by long driving.

In addition, the side support panels on both the left and right sides work to compensate for the lack of the side support performance of the existing seat back frame and to minimize the stress on the spine and the muscles around it while suppressing the disorder and shaking of the upper body of the occupant. Therefore, a high dimensional seating performance can be obtained. In particular, in the present invention, since the main structure that forms the outer frame that can be connected to the seat cushion frame of the existing seat back frame is used as the frame base structure, the frame base structure is not modified for almost all models having different shapes or sizes. There is a remarkable effect that the ideal seating performance can be obtained while being mounted as it is.

Moreover, the center support body in the seat back frame of the automobile seat of this invention is formed by bending one pipe body, and has the shape which the center pipe of right and left integral continuously extends from the both ends of the inverted U-shaped headrest bracket part. If it is set as the structure, a center support body can be manufactured inexpensively by one pipe body.

Moreover, the center support body in the seat back frame of the automobile seat of this invention consists of a pair of left and right center pipes, The head restraint is a pair of mounting angle part in each upper opening of the pair of center pipes, When the structure is installed by inserting the structure, it is easy to manufacture the standard specification structure and is suitable for mass production at low cost.

In addition, the pair of left and right side support panels in the seat back frame of the automobile seat of the present invention is supported by elastically contacting and supporting the left and right pair of side brackets through cushion spacer members mounted at appropriate positions thereof. When the center panel is loaded by the upper body of the occupant moving rearward by the impact, when the rear panel collides with the next traveling vehicle, the side support panels on both the left and right sides are pulled into the side bracket. Large side effects can be obtained in which the side support panels on both the left and right sides, which are displaced inwardly with respect to the center panel and are inwardly displaced, can be restrained and protected as if the passengers are wrapped from side to side.

1 is a perspective view showing a seat back frame of an automobile seat according to an embodiment of the present invention.

FIG. 2A is a perspective view showing a standard specification structure in the seat back frame of the embodiment, and FIG. 2B is a perspective view showing another standard specification structure.

Figure 3 is an exploded perspective view showing the lower connection structure of the frame base structure and the standard specification structure in the seat back frame of the embodiment.

4 is a right side view showing a front sheet constructed using the seat back frame of the embodiment.

Fig. 5A is a cross sectional view showing a seat back constructed using the seat back frame of the embodiment, Fig. 5B is a perspective view of a cushion spacer member, Fig. 5C is an enlarged cross sectional view of a mounting location of the cushion spacer member, and Fig. 5D is the same. It is a cross-sectional view at the time of back collision of the seat back of an Example.

Fig. 6A is a cross sectional view showing the seat back of the same embodiment, and Fig. 6B is a cross sectional view at the time of side collision of the seat back.

7A and 7B are perspective views respectively viewed from the front and rear showing another example of the upper connection structure of the frame base structure and the standard specification structure in the seat back frame of the embodiment.

8A and 8B are perspective views each showing another two examples of the upper connection structure of the frame base structure and the standard specification structure in the seat back frame of the embodiment.

9 is a perspective view showing a conventional seat frame for a vehicle.

Fig. 10 is a right side view showing a conventional car front seat.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing a seat back frame 1 of an automobile seat according to an embodiment of the present invention. The seat back frame 1 is constructed by attaching a standard specification structure 3A to the frame base structure 2, when the structure is roughly classified. As the frame basic structure 2, for example, the upper frame 52, which is a main component constituting the outer circumference of the existing seat back frame 47 of FIG. 9, the side brackets 53 and 54 and the lower cross on both the right and left sides Only the frame 55 is used. In addition, as the frame basic structure 2 which is a part of the configuration of the present invention, in addition to those shown in the present embodiment, an upper frame, a pair of left and right side frames, and a bottom cross forming a peripheral frame in a seat back frame of various existing vehicle models The main structure is composed of a frame, and is installed in various vehicles without changing the existing frame basic structure (2).

As shown in Fig. 2A, the standard specification structure 3A is formed by connecting means which the metal panel body 7 is described later on the lower part of the center support 4 formed by bending a single metal pipe in a substantially inverted U shape. It is a fixed unitary structure. The center supporter 4 is integrally provided with a head rest bracket portion 4c composed of center pipes 4a and 4b on both the right and left sides and an upper bent portion. In the present embodiment, the head rest integral type is illustrated as the standard specification structure 3A, and the head rest is joined and fixed to cover the pad (not shown) covered with the cover (not shown) to the head rest bracket portion 4c. Is installed integrally.

On the other hand, as shown in FIG. 2B, it can also be set as the standard specification structure 3B of a headrest division type | mold, and in this standard specification structure 3B, the center support body 8 only consists of the center pipes 9A and 9B of both left and right sides. And a separate head rest 44 is mounted by inserting a pair of mounting leg portions 44a and 44b of the head rest 44 into the upper end openings of the center pipes 9A and 9B on the left and right sides. It is. The panel 7 is commonly used for both types of standard specification structures 3A and 3B.

The panel body 7 is integrally provided with a center panel 7a and a pair of side support panels 7b and 7c on both the right and left sides, and on both rear sides of the center supporter 4 on the rear surface of the center panel 7a. Center pipes 4a and 4b are fixed by welding. The side support panels 7b and 7c on both the left and right sides are protruded toward the outside inclined forward from the left and right ends of the center panel 7a, respectively. Further, the center panel 7a is formed with a pattern of irregularities that can reinforce its strength. The dimensions of the center supports 4 and 8 and the panel body 7 in the standard specification structures 3A and 3B will be described later.

The aforementioned standard specification structure 3A of the head rest integral type and the standard specification structure 3B of the headrest disassembly type are both common to the frame basic structure 2 composed of the main configuration constituting the outer frame of various existing vehicles. Is attached using. The standard specification structures 3A and 3B and the frame base structure 2 are integrated by the following structure.

That is, as shown in Fig. 3, a rectangular plate shape is attached to each lower end of the center pipes 4a, 4b or 9A, 9B on the left and right of the center support member 4 in the standard specification structure 3A or 3B. The brackets 10 are in contact with each other in an intersecting arrangement, and the mounting pieces 10a and 10b protruding from both the left and right ends of the mounting bracket 10 are mounted by contacting and welding each rear part in a state of wrapping. The mounting bracket 10 is fixed to the insertion holes 55a and 55b of the lower cross frame 55 with the fixing screw 11 in contact with the front surface of the lower cross frame 55 in the frame base structure 2. It is fixed to the lower cross frame 55 by inserting and screwing into the screw holes 10c and 10d of the mounting bracket 10. FIG.

On the other hand, as shown in FIG. 1, the upper vicinity of each of the center pipes 4a, 4b or 9A, 9B on the left and right of the center support 4 in the standard specification structure 3A or 3B is a frame base structure ( It is welded to predetermined 2 places (point where the headrest mounting bracket 58 (FIG. 9) is conventionally attached) of the upper frame 52 of 2), and is fixed by the joining part 12 by this welding. .

FIG. 4 is a right side view showing the front seat 13 in which the seat back 14 is formed by using the seat back frame 1 having the standard specification structure 3A of the headrest integral type of FIG. 2A. In FIG. 10, the same or equivalent parts as those in FIG. 10 are given the same reference numerals, and redundant descriptions are omitted. In the seat back frame 1 (FIG. 1) of this front seat 13, the frame height to the upper end part which is a boundary with the headrest bracket part 4c in both center pipes 4a and 4b of the standard specification structure 3A. (H _F1 ) is set higher than the conventional frame height (H _F1 ) in FIG. 10 by the protruding length E from which both center pipes 4a and 4b protrude upward from the upper frame 52, and both center pipes The mounting height of the head rest 44 inserted and installed so as to cover the pad in the head rest bracket portion 4c that extends continuously upwards at 4a and 4b is also as high as the protruding length E.

Therefore, this seat back frame 1 is not limited to the difference in the shape of the frame base structure 2 which is the main configuration of the existing seat back frame, and the center of the shortage of the frame height H _F2 of these frame base structures 2 is centered. By supplementing in the pipes 4a and 4b, the desired frame height H _F1 can always be obtained. In addition, both center pipes 4a and 4b are formed in a shape corresponding to the S-curve Hs of the spine from the thoracic spine of the human body to the lumbar spine when viewed from the side. As a result, when the seat back frame 1 is used, good seating performance can be obtained, and when the seat back 14 is inclined backward due to rear collision, the head is held at the waist of the occupant H. There is an advantage that the part can be restrained reliably. In addition, both center pipes 9A and 9B of the headrest split type standard specification structure 3B are set to the same dimensions as the center pipes 4a and 4b, so that the headrest split type standard specification structure 3B is used. The same effect as described above can be obtained.

In addition, the standard specification structure 3A or 3B secures the basic skeleton along the S-curve Hs from the thoracic spine of the human body to the lumbar spine as described above by the center support 4 or 8 made of a pipe. Of course, in addition to this, the center panel 7a in the metal panel body 7 integrated with the center supports 4 and 8 is the posture from the lumbar spine to the pelvis, which is most important as a countermeasure against low back pain caused by long-term riding. It has a shape that can be supported to maintain a seating posture that is ideal, and, unlike the existing S spring 57, the wire 56 or the contour mat, which is elastically deformed, such as a passenger supporting part, it is elastic as a metal. Since it does not have, it can support integrally with the said favorable seating attitude. Since this structure is capable of supporting the occupant H integrally, the occupant H is always restrained while forcibly restraining the attitude of the occupant H from disturbing due to fatigue caused by long driving. It will function to maintain a good sitting posture.

Moreover, in the said seat back frame 1, the front protrusion length D1 shown in FIG. 4 is required for the side support panels 7b and 7c of the left and right sides of the panel body 7 in the standard specification structure 3A or 3B. It is set to a value. Therefore, even when the side brackets 53 and 54 on both the left and right sides of the frame basic structure 2 lack the size dimension, the side support panels 7b and 7c on both the left and right sides are provided for the lack of the side support performance due to the lack of these dimensions. In addition, since the side support panels 7b and 7c on both the left and right sides sufficiently suppress the disorder and shaking of the upper body of the occupant H, the stress generated in the backbone of the occupant and the muscles around the occupant can be minimized to a high degree. The seating performance of can be obtained.

The frame basic structure 2 is a main configuration of the existing seat back frame, and constitutes a main structure that forms an outer circumferential skeleton that can be connected to the seat cushion frame 46 (FIG. 9) through the reclining adjuster mechanism 42 (FIG. 9). to be. The seat back frame 1 is a seat back frame in which a standard specification structure 3A, which is a required integral structure, is commonly assembled to various frame basic structures 2 of different vehicle types, thereby obtaining an ideal seating performance ( 1) Therefore, the seat back frame 1 has a versatility to be mounted as it is without modification of the frame base structure 2 for almost all models having different shapes and sizes of the front seats, and suppresses an increase in manufacturing cost. At the same time, a very remarkable effect of achieving the ideal seating performance can be obtained.

In addition, the seat back frame 1 also has a function of sufficiently restraining the occupant H when a rear collision occurs or a side collision occurs, and this function will be described below. FIG. 5A shows a cross-sectional view of the seat back 14 of the front seat 13 of FIG. 4, wherein the seat back 14 has pads 17 in the entire portions of the front and left and right sides of the seat back frame 1. ) Is mounted in a covering state, and is sewn and mounted in an arrangement crossing the cover 18 between the rear ends of the pad 17.

In the side support panels 7b and 7c on both the left and right sides of the panel body 7, the supporting surface 7d is provided at a position facing the front end portions of the side brackets 53 and 54 on the left and right sides of the frame basic structure 2. As shown in Fig. 5C, which is formed by bending and is an enlarged cross section of this portion, a cushion spacer member 19 is inserted into and mounted in the mounting hole 7e on this support surface 7d. In FIG. 1 and FIG. 2, the said support surface 7d of the side support panels 7b and 7c is abbreviate | omitted briefly for the purpose of easy understanding of a component. As shown in Fig. 5B, which is an enlarged perspective view, the cushion spacer member 19 has a small diameter mounting shaft inserted into the disc-shaped spacer portion 19a and the mounting hole 7e of the support surface 7d. The portion 19b, the conical press-fit portion 19c, and the insertion guide pin portion 19d are formed of rubber in an integral shape which is connected from below in the above order.

The cushion spacer member 19 is attached to the support surface 7d in the following order. That is, the cushion spacer member 19 is inserted below the insertion guide pin portion 19d into the mounting hole 7e of the support surface 7d to position it, and then pressurized to be pushed into the mounting hole 7e. When the conical press-fitting portion 19c passes through the mounting hole 7e while elastically deforming into a pressing shape, the press-fitting portion 19c is restored to its original shape, and the mounting shaft portion 19b inserted into the mounting hole 7e is inserted. The press-fitting portion 19c and the spacer portion 19a positioned at both ends of the c) are fixed to the supporting surface 7d with the supporting surface 7d interposed therebetween.

As shown in Fig. 5A, the side support panels 7b and 7c on both the left and right sides are elastically provided at the front ends of the side brackets 53 and 54 on both the left and right sides through the spacer portions 19a of the cushion spacer member 19. It is to be supported by contact with Since the side brackets 53 and 54 in the existing frame base structure 2 are slightly different in shape or size by vehicle type, and the standard specification structure 3A is commonly used for each vehicle type, the side support panels 7b and 7c are used. The gap between the support surface 7d of the side wall) and the front end portions of the side brackets 53 and 54 is different from each other in response to the difference of the vehicle type, but the slight difference in the gap has a spacer portion 19a having a different thickness. Among the plurality of cushion spacer members 19, a suitable one that can cope with this difference can be selected and mounted on the support surface 7d or absorbed by the elastic force of the rubber of the spacer portion 19a.

In the event of a collision from the rear traveling vehicle, the seat back 14 having the structure of FIG. 5A is moved from the occupant H to the panel body 7 and the center support 4 of the standard specification structure 3A by the inertia caused by the impact. As a load to move rearward to () is applied, as shown in FIG. 5D, the center panel 7a of the panel body 7 and the side support panels 7b and 7c on both the left and right sides receive the load and move backwards. Is moved. At this time, since the left and right side brackets 53 and 54 are connected to the seat cushion frame through the reclining adjuster mechanism, the side brackets 53 and 54 are inclined slightly backwards and are not moved backwards. Accordingly, the side support panels 7b and 7c on both sides move backward while the cushion spacer member 19 is separated from the side brackets 53 and 54 and the front portion is pulled into the side brackets 53 and 54. At this time, since it receives a pressing force inward while contacting the front end portions of the side brackets 53 and 54, as shown by the arrow in FIG. 5D, it is deformed to be bent inward with respect to the center panel 7a. Do it.

The side support panels 7b and 7c on both the left and right sides deformed inwardly have a function of restraining and protecting the passenger H from the left and right. Therefore, the side support panels 7b and 7c on both the left and right sides have the function of ensuring the side support performance that sufficiently suppresses the disorder and shaking of the upper body of the occupant H at the time of normal driving described above. It also has the function of restraining and protecting the occupant H from side to side at the time of occurrence.

In the event of a lateral collision, in the seat back 14 in the steady state of FIG. 6A, for example, as shown in FIG. 6B, when the vehicle collides with the left side when viewed from the front, the vehicle from the crashed vehicle Since a load is applied to the first half of the left side support panel 7b of the panel 7 through the pad 17 and the cushion spacer member 19 by the impact, as shown by the arrow in FIG. 6B. The left side support panel 7b deforms in a state of being bent inward with respect to the center panel 7a. The left side support panel 7b, which is deformed inward, restrains and protects the occupant H, and absorbs the impact of the crash vehicle by the elasticity of the left side support panel 7b itself. It can reduce the obstacles to (H).

In the above embodiment, the lower connecting means for fixing the mounting bracket 10 and the lower cross frame 55 by the fixing screw 11, and the left and right center pipes 4a, 4b or 9A, 9B, the upper frame 52 The case where the frame base structure 2 and the standard specification structures 3A and 3b are connected by the upper connecting means welded to the above) is described. However, other means may be used for this connection. For example, as shown in Figs. 7A to 7B, the locking member 20 is formed by using the locking member 20 formed by bending both ends of the wire to form the locking hook portions 20a and 20b. While engaging the upper back of the 52, the hook hooks 20a and 20b at both ends are hooked to cover the left and right center pipes 4a and 4b from the rear, so that the hook hooks 20a and 20b are fastened. It is welded to the upper frame 52 and fixed by the joining part 21 by this welding. In this upper connecting means, the joining strength is higher than in the case where the left and right center pipes 4a and 4b and the upper frame 52 are directly welded.

As other upper connecting means, resin connectors 22 and 23 made of resin shown in Figs. 8A to 8B, respectively, are used. The connector 22 in Fig. 8A is formed with coupling grooves 22a and coupling teeth 22b at one end and the other end of one band body, respectively, and the upper and lower two places and the upper frame of the center pipes 4a and 4b. The center pipe 4a by inserting the engaging teeth 22b into the engaging grooves 22a in a wrapped state so as to connect the 52, and then pulling the engaging teeth 22b in the direction of drawing out from the engaging grooves 22a. , 4b) and the upper frame 52 are fixed while being tied together.

On the other hand, the connector 23 of Fig. 8B is formed in a shape in which the upper and lower two indentation holes 23a and 23b and the central curved portion 23c are integrally formed by hard synthetic resin, and the two indentation holes 23a and 23b are formed. ) Center pipes 4a and 4b are press-fitted in the center pipes 4a and 4b, respectively, and the center frames 4c and the upper frame 52 are press-fitted in the center bent portion 23c. Connect. The connecting means using these resin connector 22, 23 has the advantage that a welding process can be eliminated.

As described above, according to the present invention, a center support having a height dimension capable of supporting the head to the waist of the human body, and a shape capable of supporting the upper body of the human body in a desired sitting position when viewed from the side thereof, In the left and right ends of the center panel, which has a shape that can support the part from the lumbar spine to the pelvis in the spine of the human body in a desired sitting position, the side support panel portions on the right and left sides are inclined forward and integrally in the desired dimension toward the outside. The standard reconstructed structure incorporating the extended panel body is assembled to various frame basic structures, which are the main components forming the outer frame of each seat back frame of different vehicle models, so that various costs can be increased without incurring significant cost increase. Seat back of car seats to obtain desired seating performance for the car model It can realize the frame.

Claims (4)

An upper frame 52 constituting the outer frame, a frame base structure 2 composed of a pair of left and right side brackets 53 and 54 and a lower cross frame 55, At least a pair of left and right center pipes 4a and 4b having a height dimension capable of supporting the waist to the head of the human body and a shape capable of supporting the upper body of the human body in a desired sitting position when viewed from the side thereof The left and right side support panels 7b and 7c are formed at the left and right ends of the center supporter 4 having the support and the center panel 7a having a shape capable of supporting a portion from the lumbar spine of the human spine to the desired sitting posture. Standard having a panel body (7) extending in a predetermined dimension toward the outside inclined forward, and the rear of the center panel (7a) is fixed to the lower portion of the center pipe (4a, 4b) Has a specification structure 3A, The pair of center pipes 4a and 4b are arranged and fixed to the upper frame 52 so as to face each other in a state in which their upper ends protrude from the upper frame 52 by a predetermined length, and the lower cross A seat back frame for an automobile seat, wherein the lower ends of the pair of center pipes (4a, 4b) are fixed to the frame (55) so that the frame base structure (2) and the standard specification structure (3A) are integrated. The method of claim 1, The center supporter 4 is formed by bending one pipe, and has an automobile seat having a shape in which the left and right integral center pipes 4a and 4b extend continuously from both ends of the inverted U-shaped headrest bracket portion 4c. Seat back frame. The method of claim 1, The center support 8 consists of a pair of left and right center pipes 9A and 9B, and a head rest 44 is provided at each top opening of the pair of center pipes 9A and 9B. A seat back frame for an automobile seat in which 44a and 44b are inserted. The method according to any one of claims 1 to 3, Automobile seats in which the left and right pairs of side support panels 7b and 7c are elastically contacted and supported by the left and right pairs of side brackets 53 and 54 through cushion spacer members 19 mounted at appropriate positions thereof. Seat back frame.

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