JPH077222Y2 - Rotating member support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a support structure for a rotating member, and in particular, in a latch support mechanism of a vehicle seat lock device, a retaining ring for the latch member is formed from a support shaft. The present invention relates to a support structure for a rotating member that is suitable for preventing the member from falling off.

[Prior Art] Conventionally, a supporting structure for a rotating member of this type is shown in FIG.
It was configured as shown in Figure 4C. These drawings show an example of a latch support mechanism of a vehicle seat lock device. In these drawings, 1 is a base body, 2 is a cover member fixed to the base body 3, and 3 is both ends of the base body 1. Latch support shafts 4 supported by the cover member 2 and the cover member 2 are latch members.

Thus, in the example of FIG. 4A, the flange portion 3A is provided on the lower surface side of the cover member 2 of the latch support shaft 3, and the ring groove 5 is provided at a position contacting the lower surface of the latch member 4 in the fitted state. The E-shaped retaining ring 6 is laterally fitted into the ring groove to lock the retaining ring 6 to the latch support shaft 3,
I'm trying to support. In this latch support mechanism, a spring or the like (not shown) for biasing the latch member 4 in one direction is provided between the latch member 4 and the base body 1.

In the example of FIG. 4B, a stepped latch member receiving portion 2B is provided around the latch support hole 2A of the cover member 2, and in FIG. 4C, the cover member 2 and the latch member 4 are shown. A washer 7 is provided between them. In all of these conventional examples, the latch member 4 slides only around the latch support shaft 3 with respect to the cover member 2 in order to maintain smooth sliding.
A predetermined space is maintained between the cover member 2 and the latch member 4 except for the sliding portion.

[Problems to be Solved by the Invention] However, in the above-described conventional support structure for a rotating member, a member locked by a retaining ring (a latch member in the above example).
Since other members are often interposed on the retaining ring side of, for example, a spring or other member related to the mechanism thereof, the notched end portion of the retaining ring is rotated by the mechanism when the locking member is rotated. There was a risk that the retaining ring would fall off due to the related members. In addition, interposing a washer as shown in FIG. 4C increases the number of parts, which is not preferable in terms of cost reduction.

The object of the present invention is to eliminate such conventional drawbacks and to prevent the retaining ring from falling off without increasing the number of parts and due to other parts provided in connection with the mechanism. It is to provide a supporting structure for a rotating member that can perform.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a ring groove on a support shaft that is erected on a support member and rotatably supports a rotating member, and a retaining ring is provided in the ring groove. And a support structure for the rotating member, wherein the rotating member is slidably held by the retaining ring by the retaining ring. It is characterized in that a sliding contact portion projecting to the side is formed, and a recess is formed on the back surface side thereof, and the retaining ring is mounted in the ring groove in the recess.

[Operation] According to the present invention, since the retaining ring is mounted on the support member side of the rotating member in the recess provided on the rear surface side, the retaining ring can be mounted on the other member provided on the rear surface side. Can be prevented from coming into contact with and falling off, and the sliding contact portion projecting on the supporting member side around the supporting shaft can be brought into sliding contact with the supporting member.

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

1A and 1B show an example of the structure of a vehicle seat lock device to which the present invention is applied. Here, the same parts as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. In these figures, 10 is a striker fixed to the seat side (not shown), 11 is a latch member (rotating member) 4 is a striker.
A spring for urging the latch member 4 in the disengagement direction from 10, a locking plate 12 for locking the latch member 4 in an engaged state, a support shaft 13 thereof, and a claw portion 12A of the locking plate 12 wound around the support shaft 13 A spring biased toward the locking portion 4A of the latch member 4, 15 is an operating rod connected to a knob (not shown), 16 is a rod 15 and a locking plate.
Pins 17 connecting 12 and 17 are washers for the locking plate 12.

Note that such a seat lock device is attached to, for example, a side surface of a seat back of a vehicle seat, and the seat back can be locked in a seated state or can be unlocked and folded forward when folded. However, since these operations are well known and have no direct relation to the present invention, the description thereof will be omitted. 2 is an exploded view of the seat lock device described above.

Therefore, in this embodiment, as shown in FIG. 1B and FIG. 2, the support hole 4B of the latch member 4 that is locked to the latch support shaft (support shaft) 3 by the E-shaped stop ring (retain ring) 6 is provided. A step is formed around the periphery by, for example, pressing. As a result, the cover member (supporting member) 2 side is projected to form an annular sliding contact portion 41 in contact with the cover member 2, and the back surface side is recessed to form E as shown in FIG.
A retaining ring accommodating recess (concave) 42 having a depth sufficient to accommodate the retaining ring 6 is formed. It should be noted that the ring groove 5 for the E-shaped retaining ring 6 is such that when the E-shaped retaining ring 6 is fitted in the assembled state shown in FIG. It is desirable to be provided at a position where it touches.

In the support structure of the rotating member configured as described above, the E-shaped retaining ring 6 is kept fitted in the ring groove 5 of the support shaft 3 in the retaining ring housing recess 42 formed in the latch member 4. , The E-shaped retaining ring 6 does not protrude downward from the latch member 4, and therefore, even if there is another member incorporated in the lower side of the latch member 4, the E-shaped retaining ring 6 is not involved, As a result, the mold retaining ring 6 does not fall out. Further, when the E-shaped retaining ring 6 is fitted into the ring groove 5, there is no risk that the E-shaped retaining ring 6 will interfere with other members even if there is some play between them, so there is no concern that it will come off. 5 The tolerance of the shaft diameter d of the formed portion can be relaxed.

Although the above-described embodiment is applied to the vehicle seat lock device, the application of the present invention is not limited to this, and the rotating member supported by the support shaft is constituted by the retaining ring. It can be widely applied when it is fixed at a predetermined position.

[Advantages of the Invention] As described above, according to the present invention, a sliding contact portion is formed that protrudes toward the support member around the support shaft provided on the rotating member, and a recess is provided on the back surface side. Since the retaining ring is formed so that it can be fitted in the ring groove in the recess, the retaining ring does not stick out to the outside of the rotating member as in the conventional case, but the retaining ring comes into contact with other members and moves from the support shaft. It does not fall off, and it eliminates the need to install washers and sliding parts that were conventionally required to hold the rotating member so that it can slidably contact the support member. The tolerance for forming the ring groove can be expanded, which can contribute to cost reduction.

[Brief description of drawings]

1A and 1B are a top view and a sectional view, respectively, showing a structural example of a seat lock device to which the present invention is applied, and FIG. 2 is an exploded perspective view of the seat lock device shown in FIG. FIG. 4 is a cross-sectional view showing an example of the structure of the present invention, and FIGS. 4A to 4C are cross-sectional views showing an example of the structure of a conventional rotating member support structure. 1 ... Base, 2 ... Cover member (support member), 3 ... Latch support shaft (support shaft), 4 ... Latch member (rotating member), 4B ... Support hole, 5 ... Ring groove, 6 ...... E type retaining ring (retaining ring), 41 ...... sliding contact part, 42 ...... retaining ring housing recess (recess).

Claims (1)

[Scope of utility model registration request] 1. A ring groove is provided on a support shaft which is erected on a support member and rotatably supports a rotating member, and a retaining ring is attached to the ring groove so that the retaining member supports the rotating member. In a supporting structure of a rotating member, which is held so as to be slidably contactable with a member, a sliding contact portion protruding toward the supporting member around the supporting shaft is formed in the rotating member, and a recess is formed on the back surface side thereof. To form
A support structure for a rotating member, wherein the retaining ring is mounted in the ring groove in the recess.