JPH08268126A - Coil spring and installing structure thereof - Google Patents

Abstract

PURPOSE: To enhance a working property by further axially engaging and inserting the hooked part of a coil spring with and into the slit deep part of a hooking slit for penetration and then by locking the other end part of the coil spring with a support member. CONSTITUTION: With a coil spring 40 installed in the end part of a rod lever 30, the degree of immersion of an end 43 immersed the coil spring 40 is formed to be identical to the degree of slot depth of a hooking slit 32 in a rod lever 30. The projection of the rod lever 30 at its end part from the coil spring 40 is eliminated to shorten a material for the rod lever 30 to the minimum possible. No rod lever 30 at its end part projects from the coil spring 40. Thus, paying every attention is not required to such a projection in assembly to provide a good working property.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a shaft member rotatably supported by a support member, and the shaft member is rotated in one rotational direction by a restoring force of a coil spring fitted and inserted in the shaft member. The present invention relates to a coil spring mounting structure for biasing.

[0002]

2. Description of the Related Art As a conventional coil spring mounting structure,
For example, there are those shown in FIGS. 11 to 16, respectively. That is, in the seat slide device shown in FIGS. 11 and 12, a bracket 2 as a support member is fixedly mounted on the upper rail 1, and a rod lever 4 as a shaft member is rotatably supported on the bracket 2. A slit 4a cut in the axial direction is formed at the end of the rod lever 4, a latch 5 is fixed to the rod lever 4, and the latch is engaged with and disengaged from a lock hole of a lock plate 7 fixed to a lower rail 6 and the upper rail 1 Is locked so that it cannot move back and forth, and the latch spring 8 is attached to the end of the rod lever 4.
Is inserted, and after one end of the latch spring 8 is locked to the entrance edge of the slit 4a of the rod lever 4, the other end of the latch spring 8 is twisted against its restoring force,
Further, after the latch spring 8 is axially fitted and inserted so that one end of the latch spring 8 enters the inside of the slit 4a of the rod lever 4, the other end of the latch spring 8 is locked to the bracket 2. Thus, the restoring force of the latch pull 8 urges the latch 5 in a direction to engage with the lock hole of the lock plate 7. The latch spring 8 is fitted and inserted, and then the slit 4a is crushed to be crimped and prevented from coming off.

The ones shown in FIGS. 13 and 14 are
When the latch spring 8 is axially fitted and inserted so that one end of the latch spring 8 enters the inside of the slit 4a of the rod lever 4, the other end 8 of the latch spring 8 is inserted.
The a is engaged with the engagement groove 2a of the bracket 2 to prevent the latch spring 8 from coming off. Furthermore, FIG.
16 and FIG. 16, the other end of the latch spring 8 is bent downward to form a retaining projection 8b. Similarly, one end of the latch spring 8 enters the inner part of the slit 4a of the rod lever 4. As described above, the latch spring 8 is axially fitted and inserted, and the other end of the latch spring 8 is locked in the small hole 2b of the bracket 2 to prevent the latch spring 8 from coming off.

[0004]

However, in such a conventional coil spring mounting structure, the latch springs 8 are latched after one end of the latch spring 8 is engaged with the entrance edge of the slit 4a of the rod lever 4. After the other end of the spring 8 is twisted against its restoring force, and further, the latch spring 8 is axially fitted and inserted so that one end of the latch spring 8 enters the inner part of the slit 4a of the rod lever 4, The other end of the latch spring 8 is locked to the bracket 2, and only the portion corresponding to the slit 4a of the rod lever 4 from one end side of the latch spring 8 in a state where the latch spring 8 is finally fitted. Since it is necessary to lengthen the rod lever 4, the material cost is high, and since the rod lever 4 projects from the latch spring 8, the seat slide There must be careful to avoid injury during assembly of the device, there is a problem that workability is not good. The present invention has been made in view of such conventional problems, and eliminates the need to project the shaft member from the end of the coil spring, thereby reducing the material cost and injuring the seat slide device during assembly. It is an object of the present invention to provide a coil spring and its mounting structure that can improve workability without requiring care to avoid

[0005]

The gist of the present invention for achieving the above-mentioned object is: 1 A shaft member (30) is rotatably supported by a support member (20). In the coil spring mounting structure in which the shaft member (30) is biased in one rotational direction by the restoring force of the coil spring (40) fitted into the shaft member (30), While forming an engaging slit (32) to be cut in the axial direction at the end portion, the spring wire is provided at the one end portion (41) of the coil spring (40) at the inner diameter portion of the coil spring (40). Coil spring (4
(0) toward the other end (45), and the recessed end (43) is bent in a direction substantially orthogonal to the coil center axis of the coil spring (40). (44) is formed, and the coil spring (40) is formed on the shaft member (30).
Is inserted from the axial direction, and the hooked portion (44) of the coil spring (40) is locked to the slit entrance edge of the hooking slit (32), and then the coil spring (40) is In the twisted state against the restoring force, the coil spring (40) is further fitted and inserted in the axial direction so that the hooked portion (44) of the coil spring (40) enters the slit inner portion of the hooking slit (32). And then the other end (4
5) An attachment structure for a coil spring, characterized in that 5) is engaged with the support member (20).

2. A shaft member (30) is rotatably supported by a support member (20), and is fitted into the shaft member (30) to urge the shaft member (30) in one rotation direction. In the coil spring for carrying out, the spring wire is inserted into one end of the coil spring (40) toward the inner end of the coil spring (40) toward the other end (45) of the coil spring (40). , The recessed end (43) is the coil spring (4
0) A coil spring characterized in that a hooked portion (44) is formed by bending in a direction substantially orthogonal to the coil central axis.

[0007]

When the coil spring (40) is attached to the end portion of the shaft member (30), the coil spring (40) is fitted into the shaft member (30) from the axial direction to form the coil spring (4).
The hooked part (44) of (0) is locked to the slit entrance edge of the hooking slit (32). At this time, the coil spring (40) is not fitted over the entire length of the shaft member (30). After the locked portion (44) of the coil spring (40) is locked to the slit entrance edge of the locking slit (32), the coil spring (40) is twisted against its restoring force, The hooked portion (44) of the coil spring (40) enters the slit inner portion of the hooking slit (32). Further, the coil spring (40) is fitted in the axial direction, the coil spring (40) is fitted into the shaft member (30) over the entire length, and then the other end portion (45) of the coil spring (40) is supported by the support member (20). ).

To prevent the coil spring (40) from coming off, the other end (45) of the coil spring (40) is locked when the other end (45) of the coil spring (40) is locked to the support member (20). May be engaged with, for example, a locking groove of the support member (20), and by closing one end (41) of the shaft member (40), the slit entrance of the latch slit (32) is closed. You may prevent it from coming off. In the state where the coil spring (40) is attached to the end of the shaft member (30), the shaft member (30) rotates one side due to the restoring force of the coil spring (40) fitted and inserted in the shaft member (30). It will be biased in the direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 10 show an embodiment of the present invention.
1 to 3 show a seat slide device for supporting a vehicle seat so as to be movable back and forth. The seat slide device includes a pair of rail units 10 arranged below the seat.
The rail unit 10 includes an upper rail 11 fitted to a lower rail 16 so as to be movable back and forth.
An upper bracket 20, which is a support member, is fixedly installed on the upper rail 11. A lock plate 17 is fixedly provided on the lower rail 16, and a lock hole 17a is continuously provided in the lock plate 17 in the longitudinal direction.

The upper bracket 20 has a base portion 21 fixed to the top surface of the upper rail 11 and a curl portion 22 having a circular cross section extending laterally from the base portion 21. The rod lever 30, which is a shaft member, is rotatably supported between a locked position and an unlocked position. A slit 32 cut in the axial direction is formed at the end of the rod lever 30.
Is a latch 1 that engages with and disengages from the lock hole 17a of the lock plate 17 and restrains the upper rail 11 from moving forward and backward.
5 is fixed. As shown in FIGS. 1 and 3, a coil spring 40 is attached to the end of the rod lever 30. The one end portion 41 of the coil spring 40 is formed so as to pass through the coil central axis and traverse the inner diameter portion of the coil, and the one end portion 41 of the coil spring 40 has a locked portion 44.
Are formed. The hooked portion 44 of the coil spring 40 is
The spring wire is attached to the inner diameter of the coil spring 40.
The recessed end 43 is bent toward the other end portion 45, and is bent in a direction substantially orthogonal to the coil axis. As shown in FIG. 4, the one end portion 41 of the coil spring 40 does not pass through the coil central axis and traverses the coil inner diameter portion as described above, and the spring wire is directly attached to the inner diameter portion of the coil spring 40. You may make it immerse toward the other end part 45 of the coil spring 40.

The other end portion 45 of the coil spring 40 is provided on the side opposite to the one end portion 41 in a direction parallel to the coil center axis. As a procedure for attaching the coil spring 40, the coil spring 40 is inserted and inserted into the end portion of the rod lever 30, and the recessed end 43 of the coil spring 40 is inserted into the slit 32 of the rod lever 30 as shown in FIG. 2, the other end 45 of the coil spring 40 is twisted counterclockwise when viewed from the direction A in FIG. 2 against its restoring force, and the tip of the other end 45 of the coil spring 40 is fixed to the upper bracket. The coil spring 40 is fitted in the axial direction so as to correspond to the base end portion of the curl portion 22 of the coil spring 20 and the hooked portion 44 of the coil spring 40 enters the inner portion of the slit 32 of the rod lever 30. Thus, the other end 45 of the coil spring 40
Engages with the base end of the curl portion 22 of the upper bracket 20.

A coil spring 4 is provided at the end of the rod lever 30.
When 0 is attached, the coil spring 4
The restoring force of 0 urges the latch 15 in a direction to engage with the lock hole 17 a of the lock plate 17. After the hooked portion 44 of the coil spring 40 enters the inner portion of the slit 32 of the rod lever 30 and the coil spring 40 is completely fitted into the rod lever 30, the slit 32 is crushed and the coil spring 40 is It is caulked to prevent it from slipping out.

Next, the operation will be described. When the coil spring 40 is attached to the end portion of the rod lever 30, the coil spring 40 is fitted in the rod lever 30 from the axial direction, and the hooked portion 44 of the coil spring 40 causes the hooking slit 3 to move.
Make sure to engage with the slit entrance edge of No.2. At this time,
The coil spring 40 is not fitted over the rod lever 30 over the entire length. The other end 45 of the coil spring 40 does not face the rear edge of the upper bracket 20 to be locked, and is located below the rear edge of the upper bracket 20.

After the hooked portion 44 of the coil spring 40 is locked to the slit entrance edge of the hooking slit 32, the coil spring 40 is twisted against its restoring force, and the coil spring 40 is locked. The hooking portion 44 is made to enter the slit inner portion of the hooking slit 32. At this time, the other end portion 45 of the coil spring 40 faces the rear edge of the upper bracket 20 to be locked. Further coil spring 40
Is inserted in the axial direction, and the coil spring 40 is attached to the rod lever 30.
When it is fitted over the entire length, the other end 4 of the coil spring 40 is
5 is the rear edge of the upper bracket 20 and is the curl portion 2.
It comes to lock in the position corresponding to the base end part of 2.

A coil spring 40 is provided at the end of the rod lever 30.
In the state where the coil spring 40 is attached, if the recessed amount of the recessed end 43 of the coil spring 40 is made equal to the slot depth amount of the latch slit 32 of the rod lever 30, the end portion of the rod lever 30 from the coil spring 40 is Does not protrude, and the material of the rod lever 30 can be minimized,
Further, since the end portion of the rod lever 30 does not protrude from the coil spring 40, it is not necessary to pay attention to such protrusions during assembly, and workability is good. In the state where the coil spring 40 is attached to the end portion of the rod lever 30, the restoring force of the coil spring 40 fitted into the rod lever 30 causes the latch 15 to lock the lock hole 17a of the lock plate 17 via the rod lever 30. Will be urged in the direction of engaging with. That is, the rod lever 30 is rotated against the restoring force of the coil spring 40, the latch 15 is disengaged from the lock hole 17a of the lock plate 17, the upper rail 11 is moved back and forth with respect to the lower rail 16, and the seat is moved back and forth. Make movement adjustable.

5 to 8 show a second embodiment of the present invention. In the above embodiment, the other end portion 45 of the coil spring 40 is provided on the side opposite to the one end portion 41 in the direction parallel to the coil center axis.
In the embodiment, the other end 45a of the coil spring 40 is
It is directly extended in the tangential direction of the coil diameter. In this case, an engaging groove 25 cut in a direction orthogonal to the fitting direction of the coil spring 40 is formed at the base end portion of the curl portion 22 of the upper bracket 20. If the end 45a is locked, the coil spring 40
Will be locked out.

9 and 10 show a third embodiment of the present invention. That is, the other end portion 45b of the coil spring 40 is extended on the side opposite to the one end portion 41 in a direction parallel to the coil center axis, and the extended end 45c is formed so as to be bent downward. There is. In this case, a small hole 26 is formed in the base end portion of the curl portion 22 of the upper bracket 20, and if the extended end 45c is fitted into the small hole 26,
The coil spring 40 is prevented from coming off.

[0018]

According to the coil spring and the mounting structure thereof according to the present invention, in the state where the coil spring is mounted on the shaft member, only the portion corresponding to the latching slit of the shaft member is provided from one end side of the coil spring. Since it is not necessary to lengthen the length, the material cost can be reduced, and the shaft member can be formed without protruding from the coil spring, so be careful not to injure when assembling the seat slide device. There is no need, and workability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat slide device showing an embodiment of the present invention.

FIG. 2 is an explanatory view of a mounted state of a coil spring of the seat slide device showing the embodiment of the present invention.

FIG. 3 is a perspective view showing a partially broken coil spring according to an embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view showing a coil spring according to a modified example of the present invention.

FIG. 5 is a perspective view of a seat slide device showing a second embodiment of the present invention.

FIG. 6 is an explanatory view of a mounted state of a coil spring of a seat slide device showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a partially broken coil spring according to a second embodiment of the present invention.

FIG. 8 is a partially cutaway perspective view showing a coil spring according to a modification of the second embodiment of the present invention.

FIG. 9 is a perspective view showing a partially broken coil spring according to a third embodiment of the present invention.

FIG. 10 is a partially cutaway perspective view showing a coil spring according to a modification of the third embodiment of the present invention.

FIG. 11 is a perspective view of a seat slide device showing a conventional example.

FIG. 12 is an explanatory view of a mounted state of a coil spring of a seat slide device showing a conventional example.

FIG. 13 is a perspective view of a seat slide device showing another conventional example.

FIG. 14 is an explanatory view of a mounted state of a coil spring of a seat slide device showing another conventional example.

FIG. 15 is a perspective view of a seat slide device showing still another conventional example.

FIG. 16 is an explanatory view of a mounted state of a coil spring of a seat slide device showing still another conventional example.

[Explanation of Codes] 10 ... Rail Unit 11 ... Upper Rail 16 ... Lower Rail 17 ... Lock Plate 20 ... Upper Bracket (Supporting Member) 21 ... Base Part 22 ... Curl Part 30 ... Rod Lever (Shaft Member) 32 ... Latching Slit 40 ... Coil spring 41 ... One end of coil spring 43 ... Immersed end 44 ... Locked portion 45 ... Other end of coil spring

Claims (2)

[Claims] 1. A shaft member is rotatably supported by a support member, and the restoring force of a coil spring fitted into the shaft member biases the shaft member in one rotational direction. In a mounting structure of a coil spring, an engaging slit cut in the axial direction is formed in an end portion of the shaft member, and a spring wire is formed in an inner diameter portion of the coil spring at one end portion of the coil spring. A recessed portion is formed that is recessed toward the other end of the spring, and the recessed end is bent in a direction substantially orthogonal to the coil center axis of the coil spring, and the coil member is formed on the shaft member. The spring is inserted from the axial direction, and after the locked portion of the coil spring is locked to the slit entrance edge of the locking slit, the coil spring is twisted against its restoring force. , The hooked part of the coil spring is for the hooking Mounting structure of the coil spring, characterized in the other end portion of the coil spring that engages with the support member after the inserted further fitted in the axial direction so as to enter the slit inner part of the slit. 2. A coil spring, wherein a shaft member is rotatably supported by a support member and is fitted into the shaft member to urge the shaft member in one rotation direction. At one end, the spring wire is recessed into the inner diameter of the coil spring toward the other end of the coil spring, and the recessed end is bent in a direction substantially orthogonal to the coil center axis of the coil spring. A coil spring having a hooked portion formed by the above.