JPH0614612Y2 - Assembly structure of seat backrest frame and seat backrest shell for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a structure of a backrest portion of a vehicle seat.

[Prior Art] Automotive driving seats and passenger seats
A cushion frame is movably attached to the body of an automobile in the front-rear direction.A seat cushion pad that supports the hips of the user is attached to this cushion frame, and a seat backrest frame that forms the skeleton of the seat backrest is attached. The seat backrest frame is mounted so as to be tiltable, and further, the seatback rest shell is mounted on the back part of the seatback rest frame, and the seatback rest pad is mounted on the front part.

FIG. 7 shows a conventional assembly structure of the seat back rest frame and the seat back rest shell. The seat backrest frame 1 is formed by assembling a pipe into a substantially rectangular shape.
Is arranged so as to surround the protruding portion 2a that protrudes forward in the seat back rest shell 2, and the screw 3 is inserted from the back side of the seat back rest shell 2 to form a screw hole (not shown) formed in the seat back rest frame. The seat back rest shell 2 is fixed to the seat back rest frame 1 by being screwed into ().

Further, FIG. 8 shows another conventional example of the same assembly structure, in which a substantially C-shaped fixture 5 made of spring steel is fixed to the front edge portion of the seat back rest shell 2 to provide a seat back. Push the rest frame 1 from the open side of the fixture 5,
Insert the fixture 5 while expanding it against its elasticity. The fitting 5 holds the seat backrest frame 1 by its elastic force, and thereby fixes the seatback rest shell 2 to the seatback rest frame 1.

[Problems to be Solved by the Invention] However, the above-described conventional assembly structure of the seat back rest frame 1 and the seat back rest shell 2 respectively has the following problems.

In the assembly structure shown in FIG. 7, since the head of the screw 3 projects from the back surface of the seat backrest shell 2, it is necessary to attach the cap 4 to the head of the screw 3 in order to improve safety and design. However, there is a disadvantage that the number of man-hours increases and it takes time and effort. Further, even if the cap 4 is attached, the protruding portion is still present on the back surface of the seat back rest shell 2, and as long as this is the case, the unsightly appearance cannot be eliminated. Especially when the cap 4 comes off.

On the other hand, in the assembly structure shown in FIG. 8, since the seat backrest shell 2 is attached to the seatback rest frame 1 only by the elastic force of the attachment 5, there is a drawback that the fixing is not reliable. .

The present invention has been made in view of the problems of the above-described conventional technology, and the purpose thereof is to secure a fixed seat and a good-looking seat backrest frame and seatback rest shell for a vehicle. It is about to provide an assembly structure.

[Means for Solving the Problems] This invention has been made in order to achieve the above object.
The main point is that the seat backrest frame has an approximately U-shaped upper frame and both ends are connected to both ends of the upper frame, and the length between the connected both ends is shorter than the distance between both ends of the upper frame. The seat frame is composed of a lower frame, and grooves are formed on both sides of the seat back rest shell.Thus, by inserting the parallel part of the upper frame into the groove of the seat back rest shell, each end of the upper frame is inserted. The seat backrest frame and the seat backrest for a vehicle, characterized in that the respective parallel parts are brought close to each other to hold the seat backrest shell by screwing and fixing each end part of the lower frame to the seat part. It is in the shell assembly structure.

[Operation] By inserting the upper frame of the seat backrest frame into the groove of the seat backrest shell and fixing each end of the lower frame with each end of the upper frame by screwing, the parallel portions are brought closer to each other and the seat is seated. Since the backrest shell is sandwiched, the fastening force is strong, and the seatback rest shell can be securely fixed to the seatbackrest frame.

Moreover, since the mounting screws and the like do not project outward from the seat backrest shell, it looks good.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings from FIG. 1 to FIG.

FIG. 1 is a perspective view showing the assembly structure of the seat back rest frame 10 and the seat back rest shell 20 as seen from the lower front side, and in this embodiment, a mode of a seat back rest of a vehicle driving seat is shown. .

The seat backrest frame 10, which forms the skeleton of the seatback rest, is formed of a metal pipe, and is an upper frame 11 that is bent in a substantially U shape, and a lower frame that is bent in an arc shape and connects both ends of the upper frame 11. It is composed of twelve.

The upper frame 11 includes parallel portions 11a, 11a arranged to face each other in a substantially parallel manner, and a connecting portion 1 for connecting the parallel portions 11a, 11a.
1b, and the front ends of the parallel portions 11a, 11a are crushed into flat portions 11c, 11c. In each parallel portion 11a, an engaging portion 11d that is crushed to have a flat cross section is formed near the connecting portion 11b. Further, headrest supports 11e, 11e for supporting stays (not shown) of the headrest are welded and fixed to the connecting portion 11b.
In addition, each end portion of the lower frame 12 is also crushed so that the flat portion 12a,
It is set to 12a. The length from one flat portion 12a to the other flat portion 12a is shorter than the distance between the flat portions 11c, 11c of the upper frame 11.

The upper frame 11 and the lower frame 12 are connected via a movable arm 13a of a hinge 13 having a tilting mechanism. That is, the hinge 1 is provided between the flat portion 11c of the upper frame 11 and the flat portion 12a of the lower frame 12.
By sandwiching the movable arm 13a of No. 3 and inserting a bolt 14 into these from the outside of the flat portion 11c of the upper frame 11 and screwing them into a nut 15 welded and fixed to the inside of the flat portion 12a of the lower frame 12, Upper frame 11
And the lower frame 12 are connected.

On the other hand, the seat backrest shell 20 is made of resin and manufactured by a blow molding method. The seat backrest shell 20 includes a back receiving portion 21 having a predetermined shape and protruding forward at the center of the front side thereof, and the back receiving portion 2
1 has a lower reinforcing portion 22 located on the lower side and projecting forward, and a lateral reinforcing portion 23 located on both sides of the back receiving portion 21 and also projecting forward. A pair of recesses 21a, 21a for the headrest support 11e of the seat backrest frame 10 are formed in the upper portion on the front surface side of the back receiving portion 21. A space portion 24 into which the lower frame 12 of the seat backrest frame 10 is inserted is formed between the back receiving portion 21 and the lower reinforcing portion 22. Further, between the back receiving portion 21 and the lateral reinforcing portions 23, the parallel portions 1 of the upper frame 11 of the seat backrest frame 10 are provided.
A groove 25 into which 1a is inserted is formed. The lateral reinforcing portion 23 and the groove 25 have a slightly irregular cross-sectional shape as shown in FIGS. 4 to 6. That is, below the substantially vertical center of the back receiving portion 21, the back receiving portion 21 projects forward from the side reinforcing portion 23 as shown in FIG. As shown in FIG.
And the side reinforcing portion 23 protrudes to the same extent to the front, or the side reinforcing portion 23 protrudes further forward. Further, the groove 25 is narrowed only to a portion where the engaging portion 11d of the upper frame 11 of the seat backrest frame 10 is inserted, as shown in FIG. 6, so that the engaging portion 11d is mounted. Narrow portion (engaged portion) 25a
Has been

Next, the assembly state of the seat back rest frame 10 and the seat back rest shell 20 will be described according to the assembly procedure.

First, as shown in FIG. 2, the upper frame 11 of the seat backrest frame 1 is made to have its parallel portions 11a, 11a slightly close to each other as shown by the arrow in the figure against the elasticity thereof so as to narrow the gap. , Seat backrest shell 2
0 groove 25. At that time, the upper frame 11
By aligning the respective engaging portions 11d with the respective narrow portions 25a of the groove 25, relative positioning between the upper frame 11 and the seat backrest shell 20 can be easily performed. The upper frame 11 inserted in the groove 25 expands again in the groove 25 due to its elasticity, and as a result, abuts against the lateral reinforcing portion 23 as shown by the broken line in each of the sectional views of FIGS. 4 to 6. .

Next, the lower frame 12 of the seat back rest frame 10 is inserted into the space portion 24 of the seat back rest shell 20, and the flat portions 12a at both ends are respectively inserted into the upper frame 1.
It is located inside each of the flat portions 11c. At this time, in the state where the lower frame 12 is brought into contact with the lower portion of the back receiving portion 21 of the seat backrest shell 20, the flat portion of the lower frame 12 is larger than the screw insertion hole provided in the flat portion 11c of the upper frame 11. Nut 1 provided on 12a
5 is eccentric so that it is located slightly downward.

Further, the movable arms 13a of the hinges 13 are interposed between the flat portion 11c of the upper frame 11 and the flat portion 12a of the lower frame 12, respectively, and the bolts 14 are inserted into the lower frame 12 from the outside of the upper frame 11. The bolt 14 is screwed into the nut 15 so that both ends of the bolt are bent upward and lifted. Then, as the bolt 14 is tightened, both flat portions 12 of the lower frame 12 are
The length between a and 12a is equal to both flat portions 1 of the upper frame 11.
Since it is shorter than the distance between 1c and 11c, the upper frame 11
Elastically deforms and the two parallel portions 11a, 11a approach each other. Securely screw the bolt 14 into the nut 15,
In the state where the flat portion 11c of the upper frame 11, the movable arm 13a of the hinge 13 and the flat portion 12a of the lower frame 12 are connected and fixed, the parallel portion 11a of the upper frame 11,
11a are brought closer to each other against their elasticity,
As shown by the solid lines in the sectional views of FIGS. 6 to 6, the parallel portions 11a are the back receiving portions 21 of the seat backrest shell 20.
Comes into pressure contact with. As a result, the seat backrest shell 20 is held between the left and right sides of the seat backrest shell 20 by the parallel portions 11a, 11a of the upper frame 11. This mounting strength can be set to a desired and sufficient size by setting the dimension between both flat portions 12a of the lower frame 12 to a predetermined value. At the same time, the seat backrest shell 20 is connected to both the engaging portions 1 of the upper frame 11.
It will be held from above and below by 1d and 11d and the lower frame 12. Therefore, the seat back rest shell 20 is securely fixed to the seat back rest frame 10.

In the seat backrest frame 10 and the seatback rest shell 20 assembled as described above, as shown in FIG. 3, the pedestal portion 13b of the hinge 13 is fixed to the cushion frame 30 by fixing means such as bolts and nuts. It is attached to the cushion frame 30 by being fixed through. The cushion frame 30 is attached to a body (not shown) of an automobile so as to be movable in the front-rear direction via a slider mechanism. Then, the seat cushion pad 40 is attached to the cushion frame 30,
When the seat back rest pad 50 is attached to the seat back rest frame 10 and the seat back rest shell 20, the driving seat is completed. Seat backrest frame 10 and seatback rest shell 20
When the seat back rest pad 50 is attached to the seat back rest pad 50, the connecting portion between the seat back rest frame 10 and the seat back rest shell 20 is covered by the seat back rest pad 50, which is good looking.

This invention is not limited to the above-mentioned embodiment, and various modes can be adopted.

For example, in the above-described embodiment, the upper frame is flattened in the middle to reduce the cross section to form the engaging portion, and the narrow portion, which is the engaged portion, is formed in the groove of the seat backrest shell correspondingly. Although it is provided, the engaging portion is formed by bulging the middle of the upper frame and enlarging the cross section, and correspondingly, the groove is partially bulged to form the engaged portion. Good.

[Effects of the Invention] As described above, according to the present invention, the parallel portion of the upper frame of the seat backrest frame is inserted into the groove of the seatback rest shell, and the gap between them is provided at each end portion of the upper frame. By fixing each end of the shorter lower frame with screws, the parallel parts are brought closer to each other and the seat backrest shell is sandwiched, so that the fastening force is strong and the seat backrest shell is seated. An excellent effect is obtained in that it can be securely fixed to the backrest frame.

Moreover, since the mounting screws and the like do not project outward from the seat backrest shell, there is an effect that the appearance is improved.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is an exploded perspective view of a seat back rest frame and a seat back rest shell seen from the lower front side, and FIG. Is a perspective view of the upper frame of the seat back rest frame and the seat back rest shell as seen from above, FIG. 3 is an exploded perspective view of the seat, and FIG.
Fig. IV-IV sectional view, Fig. 5 is the same V-V sectional view, and Fig. 6 is the same.
It is a VI-VI sectional view. 7 and 8 are perspective views showing a conventional assembly structure of a seat back rest frame and a seat back rest shell. 10 ... Seat backrest frame, 11 ... Upper frame, 11a ... Parallel part, 11d ... Engagement part, 12 ... Lower frame, 20 ... Seat backrest shell, 25 ... Groove, 25a ... Cover Engagement part, 14 ... Bolt, 15 ... Nut, 50 ... Seat back rest pad.

Claims (2)

[Scope of utility model registration request] 1. A seat back rest frame, which is a skeleton of a seat back rest supported by a body of a vehicle, and a seat back cover attached to the back of the seat back rest frame, the seat back rest pad being attached to the front surface. In the assembly structure of the rest shell, the seat back rest frame has a substantially U-shaped upper frame and both ends of the upper frame are connected to both ends of the upper frame. The lower frame is shorter than the space between the parts, and grooves are formed on both sides of the seat backrest shell.Thus, the parallel part of the upper frame is inserted into the groove of the seat backrest shell. , By fixing each end of the lower frame to each end of the upper frame with screws. , Assembly structure of the seat backrest frame and the seat back rest shell for a vehicle, characterized in that by approaching the parallel portion to each other so as to sandwich the seat backrest shell. 2. The parallel portion of the upper frame has an engaging portion formed by deforming the cross section in the middle thereof, and the engaging portion of the upper frame is inserted into the groove of the seat backrest shell. The assembled structure of the vehicle seat backrest frame and the seat backrest shell according to claim 1, characterized in that an engaged portion having a shape corresponding to the engaging portion is provided on the.