JPH0248260Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking mechanism used, for example, in a car seat to lock the seat from tilting forward.

[Conventional technology]

Conventional examples are shown in FIGS. 4 and 5. In the figure, 1 is a frame body, and a fitting groove 2 for a striker 5 is formed in the frame body, and the fitting groove 2 is vertically long and opens at the lower edge of the frame body 1. A striker locking pawl 3 is pivotally attached to the lower part of the body 1 so as to protrude into the fitting groove 2, and is biased by a spring 4 in the direction of the fitting groove 2 shown by the arrow. In such a locking mechanism 10, the striker 5 is brought into contact with the arc-shaped upper edge 31 of the locking pawl 3 that is fitted into the fitting groove 2, so that the striker 5 is engaged with the locking mechanism 10. It is locked so that it does not come off from the fitting groove 2.

[Problem that the invention attempts to solve]

In the above prior art, the frame 1 is bifurcated by the fitting groove 2, and when an upward force is applied to the locking mechanism 10, the frame 1 mainly moves into the fitting groove 2.
Due to this deformation, the arcuate upper edge 31 of the locking pawl 3 slides against the striker 5, as shown in FIG. Since it comes into contact with the striker 5 at the end on the side of the matching groove 2, the striker 5 tends to slip and come off from the upper edge 31 of the locking pawl 3 if further upward force is applied. Since such a locking mechanism 10 is applied to a heavy object such as a seat, it is susceptible to deformation due to upward force exerted by impact or the like.

[Means for solving problems]

As a means to solve the above problems, the present invention forms a fitting groove 2 for the striker 5 in the frame 1,
The fitting groove 2 is vertically elongated and opens at one edge of the frame 1, and the fitting groove 2 is opened from the edge of the frame 1 where the fitting groove 2 is open. The root portion of the striker locking pawl 3 is pivoted so as to protrude, and the striker locking pawl 3 projects into the fitting groove 2, and has an arcuate tip edge 3 with which the striker 5 abuts within the fitting groove 2.
1, and a recess 31A is provided at the end of the arcuate tip edge 31 on the fitting groove 2 side.

[Effect]

The operation of the present invention based on the above configuration is as follows.

The fitting groove 2 of the frame body 1 is inserted into the striker 5 from the opening.
The arcuate tip edge 3 of the striker locking claw 3
When the striker 1 is brought into contact with the striker 5, the striker 5 is locked so that it does not come off the fitting groove 2. When the frame 1 is deformed and the arcuate tip edge 31 of the locking pawl 3 slides against the striker 5, and as a result comes into contact with the striker 5 at the end on the fitting groove 2 side, The striker 5 fits into the recess 31A of the arcuate tip edge 31.

[Effect of idea]

Therefore, in the present invention, even if a force is applied to the locking mechanism in the direction opposite to the opening side of the fitting groove and the locking mechanism is deformed, the striker will not slip off from the locking pawl. Definitely prevented.

〔Example〕

The present invention will be described with reference to an embodiment shown in FIGS.
A fitting groove 2 is formed, and the fitting groove 2 is vertically elongated in the vertical direction and opens at one edge of the frame 1, so that the frame 1 has a bifurcated shape. The inner lower part of the frame 1 has an arcuate tip edge 31 that comes into contact with the striker 5 in the fitting groove 2, and a handle 32 that projects upward from the opposite side of the tip edge 31 to the fitting groove 2. The root portion of the striker locking pawl 3 is pivotally attached via a shaft 33. A recess 31A is formed at the end of the tip edge 31 of the locking pawl 3 on the fitting groove 2 side, and the locking pawl 3 is further pushed in the direction of the fitting groove 2 shown by the arrow in FIG. 1 by a spring 4. and is locked by a stopper 6.

The locking mechanism 10 having the above structure is attached to the underside of a seat, for example, and the striker 5 is attached to the floor. And when used as a seat, the locking mechanism 10
The striker 5 fits into the fitting groove 2 from the opening, and the arcuate tip edge 31 of the locking pawl 3 comes into contact with the striker 5, so that the locking pawl 3 is engaged with the striker 5, and the seat is closed. This prevents the front from falling forward. When the seat is to be tilted forward, the locking pawl 3 is rotated through the handle 32 in the direction opposite to the direction of the fitting groove 2 shown by the arrow in FIG. 1 to disengage the striker 5. It becomes possible to escape from the fitting groove 2 of the stop mechanism 10. An upward force, that is, a force in a direction opposite to the opening side of the fitting groove 2 is applied, and the locking mechanism 10 is deformed, for example, bending in a direction such that the bifurcated frame 1 opens in the fitting groove 2. If the locking claw 3 has a tip edge 31 as shown in FIG.
The striker 5 slides against the striker 5 in the fitting groove 2, but the striker 5 slides against the recess 3 in the tip edge 31 of the locking pawl 3.
1A, the striker 5 is prevented from slipping off from the locking pawl 3 even if any further upward force is applied.

In this embodiment, the locking mechanism 10 is connected to the fitting groove 2 of the frame body 1.
However, in the present invention, the locking mechanism 10 may be oriented in any direction; for example, if the fitting groove 2 of the frame body 1 is vertically elongated in the left-right direction or the front-rear direction. It may be arranged so that

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is a cutaway side view, Figure 2 is a perspective view, Figure 3 is a side view in a deformed state, and FIG. 4 is a cutaway side view of the conventional example, and FIG. 5 is a cutaway side view of the conventional example in a modified state. In the figure, 1... Frame body, 2... Fitting groove, 3... Striker locking claw, 31... Arc-shaped tip edge, 31A...
...concavity.

Claims (1)

[Scope of utility model registration request] A striker fitting groove is formed in the frame, and the fitting groove is vertically elongated and opens at one edge of the frame,
Further, a root portion of a striker locking claw is pivotally attached to the edge of the frame where the fitting groove is open, and the striker locking claw projects into the fitting groove and is inserted into the fitting groove. A locking mechanism characterized by having an arcuate tip edge that a striker comes into contact with, and a recessed portion provided at the fitting groove side end of the arcuate tip edge.