JPH0321629Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Technical Field of the Invention>> This invention relates to a hinge cover for a vehicle seat.

<Prior art and its problems> In a reclining seat, a back frame and a cushion frame are rotatably joined. In order to prevent the cladding material from rubbing against the frame in this area, the cladding material will be worn out.
Conventionally, as shown in FIGS. 4 and 5, a plastic hinge cover 2 is fitted to the joint end of the back frame 1, and bolt insertion holes 3 formed in the hinge cover 2 and insertion holes formed in the back frame 1 are inserted. A bolt 4 is screwed into a nut portion 5a provided on a cushion frame 5 through the bolt 1a.

However, with this alone, the outer periphery of the bolt 4 cannot be inserted into the bolt insertion hole 1 formed in the back frame 1.
a, the bush 6 provided with a split groove is inserted into the insertion holes 3 and 1a, thereby preventing the occurrence of abnormal noise.

However, with this configuration, the number of parts increases as the bush 6 is required, making parts management troublesome. In addition, the assembly requires fitting the hinge cover 2 into the back frame 1, then fitting the bushing 6, and then inserting the bolt 4.
The number of man-hours required was also increasing.

<<Purpose of the invention>> The purpose of this invention is to eliminate the bushing for preventing abnormal noise and reduce the number of parts.

<<Structure of the invention>> In order to achieve the above object, this invention is a hinge cover that covers the end of the back frame,
A bolt is inserted into the insertion hole formed in the hinge cover, and the tip of the bolt is screwed to the cushion frame, in which a thin hinge part is arranged in a 360° circumference at a position corresponding to the inner circumference of the bolt insertion hole. A plurality of bushing pieces are formed in the thin-walled hinge portion and further form weak connection portions radially from the inner circumferential portion of the thin-walled hinge portion and protrude into the insertion hole, and can be bent toward the inner circumferential side via the thin-walled hinge portion. As the bolt is inserted, each bushing piece is bent inward using the thin hinge portion as a fulcrum and surrounds the outer periphery of the bolt.

<<Description of Embodiments>> Fig. 1 is an exploded perspective view showing the hinge cover 10 and its mounting structure according to this invention, Fig. 2 is a sectional view of the main part, and Fig. 3 is a sectional view showing the bolt 4 in the attached state. be.

Note that the parts other than the hinge cover 10 are the same as the conventional one, so the same reference numerals will be used in the description.

In the figure, a recess 10a for receiving the head of a bolt 4 is formed on one side of a hinge cover 10 made of a plastic molded body formed in the shape of an end of a back frame 1, and the inner periphery of the recess 10a is formed with a bolt insertion hole. It is said that

A thin hinge portion 11 is formed in a 360° circumference at a position corresponding to the inner periphery of this insertion hole, and weak connection portions 1 are formed radially on the inner periphery of the thin hinge portion 11.
A plurality of bushing pieces 14 are formed toward the inner peripheral side and project into the insertion hole.

Note that the insertion hole 16 on the back side of the hinge cover 10
The hole is the same as the conventional one.

Therefore, when the hinge cover 10 is inserted into the back frame 1 and the bolt 4 is fitted into the insertion hole, the weak connection between the adjacent bushing pieces 14 is severed, and each bushing piece 14 is connected to the thin hinge part. 1
1, that is, the bolt 4 is bent inward using the inner peripheral part of the bolt insertion hole as a fulcrum, as shown in Fig. 3.
The bushing 6 is inserted between the outer periphery of the bolt and the bolt insertion hole 1a provided in the back frame 1.

Further, in the above configuration, since there is no protrusion inside the hinge cover 10, it is easy to integrally mold the hinge cover 10, and the mold structure for manufacturing can be simple.

<<Effects of the invention>> As explained above in the embodiments, in this invention, by inserting the bolt into the hinge cover, the bush piece formed on the inner circumference surrounds the outer circumference of the bolt, creating a kind of bush. Unlike conventional methods, a separate bushing is not required for configuration. Therefore, according to this invention, workability is improved, parts management is simplified, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the mounting structure of the hinge cover according to this invention, FIG. 2 is a sectional view of the main part of the hinge cover, and FIG. 3 is a sectional view showing the same mounting state.
FIG. 4 is an exploded perspective view showing a conventional hinge cover mounting structure, and FIG. 5 is a sectional view showing the same mounting state. 1... Back frame, 4... Bolt, 5...
Cushion frame, 10...Hinge cover, 1
1...Thin hinge part, 12...Weak connection part, 14...
...A piece of crap.

Claims (1)

[Scope of utility model registration request] A hinge cover that covers the end of a back frame, in which a bolt is inserted into an insertion hole formed in the hinge cover and the tip of the bolt is screwed to the cushion frame, the inner circumference of the bolt insertion hole is A thin hinge part is formed in a 360° circular pattern at the corresponding position, and a plurality of bushing pieces that protrude into the insertion hole and form weak connection parts radially from the inner peripheral part of the thin hinge part are formed on the inner peripheral side. The bushing is formed so that it can be bent through the thin-walled hinge portion, and as the bolt is inserted, each bushing piece is bent inward using the thin-walled hinge portion as a fulcrum to surround the outer periphery of the bolt. Vehicle seat hinge cover.