JPH0434744Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a silencer that prevents the generation of abnormal noise at the mounting portion of a cushion spring attached to a vehicle seat such as an automobile.

<Prior Art> Generally, an S spring or the like is used as a cushion spring for a vehicle seat, and both ends of the spring are fixed to spring mounting seats of a seat frame to enhance cushion spring properties. FIG. 5 shows a structure in which a cushion spring 51 made of an S spring is attached to a seat frame 52. A mounting seat 53 is cut and raised at an appropriate location on the seat frame 52, and the bent end portion 51a of the cushion spring 51 is inserted between the mounting seat 53 and the seat frame 52. By pressing the portion, a concave portion 54 is formed to prevent the cushion spring 51 from coming off. However, in such a mounting structure, when an external force is applied to the cushion spring due to vibrations when the vehicle is running, the movement of a seated person, or a change in seating position, metallic noise such as squeaks may be heard from the part in contact with the mounting seat. An abnormal noise is generated, causing discomfort. For this reason, silencers have conventionally been used to prevent direct contact between the bent end of the cushion spring and the mounting seat of the seat frame. 6 and 7 show conventional perspective views of such silencers. All of these silencers are made of synthetic resin, and the one shown in Figure 6 has a bag-like shape as a whole, and the upper surface thereof is cut out in a "U" shape to form a "U" shaped groove 55. Along with
A projection 56 is formed on the top surface to abut against the end surface of the mounting seat. The bent end of the cushion spring is inserted from the open end of the silencer and fitted into the groove 55, and in this assembled state is fitted into the mounting seat of the seat frame for use. On the other hand, the silencer shown in FIG. 7 has "U"-shaped gutter-like bodies 58 and 59 connected by a hinge part 57, and the hinge part 57 is bent to connect one gutter-like body 58 to the other. By abutting against the gutter-like body 59, the bent end portion of the cushion spring is covered.

<Problems to be solved by the invention> However, in any of the conventional examples, the groove portion 55 or the gutter-like bodies 58, 59 have fixed dimensions, so it is necessary to prepare a cushion spring according to the type of cushion spring. . Normally, cushion springs with different pitches are used depending on the part where they are attached, even on the same seat, in order to obtain cushioning properties according to the support part of the seated person and the amount of deflection of the cushion pad, and to adjust the balance. However, since conventional silencers are compatible with only a single pitch, it is necessary to use silencers of various sizes. For this reason, conventional silencer manufacturing requires a large number of molds depending on the size, which increases manufacturing costs, and also makes it troublesome to select and use a suitable silencer from among the many types. .

The present invention was made in consideration of the above circumstances, and aims to reduce manufacturing costs and eliminate the complexity of use by providing a silencer that can be adapted to various pitches of cushion springs.

<Means for Solving the Problems> In order to achieve the above object, the present invention allows the interval between the engagement grooves into which the bent ends of the cushion springs are inserted to be adjustable according to the pitch of the springs,
In a silencer that is fitted into a spring mounting seat of a seat frame, a pair of left and right engagement grooves whose openings face each other so that the bent end of the spring is inserted, and the engagement groove are connected to each other. A spring that expands and contracts so that the spacing between the engagement grooves matches the pitch of the spring, is inclined so that the front side in the spring insertion direction is lower, and is inserted between the rear end and the rear end of the engagement groove. and a connecting piece whose upper end is higher than the lower end of the engagement groove so that the bent end of the engaging groove is fitted into the connecting piece.

Alternatively, the connecting piece is formed into a bellows shape.

<Operation> When the bent end of the spring is inserted into the engagement groove, even if the pitch of the spring is different, the connecting pieces of the left and right engagement grooves will expand and contract to fit the pitch and move closer or apart. do. The same applies when the connecting piece has a bellows shape.

When the bent end of the spring is inserted into the engagement groove,
Insert the bent end of the spring along the front slope of the connecting piece in the insertion direction.

When the bent end of the spring is inserted into the engagement groove,
It is sandwiched between the rear end of the engagement groove and the rear end of the connecting piece, and the bent end of the spring is fixed to the engagement groove.

<Examples> Examples illustrating the present invention will be specifically described below.

FIG. 1 is a perspective view of an embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views taken along lines - and -, and FIG. 4 is a perspective view of the device in an installed state. This silencer 1 has left and right engagement grooves 2, 3, and engagement grooves 2, 3.
It consists of a connecting piece 4 which is arranged in series, and these are integrally molded from synthetic resin. The left and right engaging grooves 2 and 3 are shaped like troughs with open sides, and the openings face each other. The bent ends 10a of the cushion spring 10 are inserted into the engagement grooves 2 and 3, respectively.
The front end of the spring 10 in the insertion direction is released and serves as an insertion opening end, and the rear end parts in the insertion direction are curved so as to approach each other. Furthermore, projections 5 and 6 are formed on the upper surface of each of the engagement grooves 2 and 3 to abut against the end surface of the spring mounting seat 12 of the seat frame 11.

The connecting piece 4 is interposed between these engaging grooves 2 and 3 to connect the engaging grooves 2 and 3, and this connecting piece 4 can expand and contract in the lateral direction, that is, in the direction of the engaging grooves 2 and 3. It's becoming possible. In this embodiment, the connecting piece 4 is formed into a bellows shape that is bent into multiple strips parallel to the lateral direction of the engaging grooves 2 and 3, and is shown in FIG.
As shown by B, the cushion spring 10 can be expanded and contracted according to the pitch of the bent end 10a of the cushion spring 10 inserted into the engagement grooves 2 and 3. Therefore, even for cushion springs 10 with different pitches, the engagement groove 2,
The spacing of 3 is adapted to suit different types of cushion springs. This connecting piece 4 has an engagement groove 2,
Spring 1 is provided so that the lower surface of Spring 3 is connected to
As shown in FIG. 2, the front side in the insertion direction of 0 is a tapered surface 7 that becomes lower in order compared to the rear side. By forming the tapered surface 7 on the front side in this manner, the bent ends 10a of the springs inserted into the engagement grooves 2 and 3 slide against the tapered surface 7, so that insertion of the bent ends is performed smoothly. Further, the rear end of the connecting piece 4 is formed to be located in front of the rear end of the engaging grooves 2 and 3, and the rear end of the connecting piece 4 is located closer to the lower surface of the engaging grooves 2 and 3. It is also bent so that it is higher. By forming it in this way, the bent end portion 10a of the spring inserted into the engagement grooves 2 and 3 is aligned with the rear end of the connecting piece 4 and the rear end of the engagement grooves 2 and 3, as shown in FIG. The structure is such that the connecting piece 4 is fitted between the connecting piece 4 and prevented from coming off by the rear end wall of the connecting piece 4.

The silencer 1 as described above is as shown in Fig. 4.
The bent end portion 10a of the spring 10 is inserted into the engagement grooves 2 and 3 for use, but since the connecting piece 4 expands and contracts,
It can also be well adapted to springs of different pitches. After the spring 10 is inserted, it is inserted into the mounting seat 12 of the seat frame 11 in that state, and is prevented from coming off by pressing the center portion of the mounting seat 12. As a result, the silencer 1 is interposed between the spring 10 and the mounting seat 12, and direct contact between them is prevented, thereby eliminating the generation of abnormal noise.

Note that various modifications can be made to the present invention.
The connecting piece may not be shaped like a bellows, but may be made of a stretchable material such as rubber.

<Effects of the invention> As described above, according to the invention, since the engagement groove into which the bent end of the spring is inserted is connected with an expandable connecting piece, it can be well adapted to springs of different pitches. It can be done and it will be effective.

Since the spring bent end of the connecting piece is sloped on the front side in the insertion direction, the spring bent end can be easily inserted.

Since the bent end of the spring is fixed between the rear end of the connecting piece and the rear end of the engagement groove, the bent end of the spring does not fall off from the spring cushion silencer. Since the bent end of the spring is fixed to the silencer, there is no fear that it will fall off, and the work of assembling and fixing it to the frame becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIGS. 2 and 3 A and B are lines and lines shown in FIG. 1.
A line sectional view, FIG. 4 is a perspective view of the state in use, FIG. 5 is a perspective view showing the spring installation state when no silencer is used, and FIGS. 6 and 7 are perspective views showing examples of conventional silencers. It is a diagram. 1... Silencer, 2, 3... Engagement groove, 4...
Connecting piece.

Claims (1)

[Claims for Utility Model Registration] (1) In a silencer fitted into a spring mounting seat of a seat frame, a pair of left and right engagement grooves whose openings face each other so that the bent end of the spring can be inserted. , the engagement grooves are arranged in a row, and the engagement grooves are expanded and contracted so that the spacing between the engagement grooves matches the pitch of the spring, and the front side in the insertion direction of the spring is inclined to be lower, and the rear end and the engagement groove a coupling piece having an upper end higher than the lower end of the engagement groove so that the bent end of the spring inserted between the engagement groove and the rear end is fitted; Silencer. (2) The silencer for a cushion spring according to claim 1, wherein the connecting piece is formed into a bellows shape.