JPH0511075Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention relates to the improvement of a locking mechanism for fixing and folding a foldable seat back that is attached to a seat in an automobile, etc., and that allows the seat back to be folded forward. It is something.

``Prior Art'' A lock mechanism is composed of three parts: a lever, a bracket, and a tension spring connecting the lever and the bracket.

This lever has a recess that engages and disengages a lock pin fixed to the vehicle body, a female thread provided on a receiver fixed to the seatback frame, and a mounting hole through which a mounting screw that rotatably screws the lever is inserted. have Further, the bracket is provided with a pawl that is locked into the locking hole of the receiver, and a mounting hole through which a mounting screw is inserted.

When attaching the lock mechanism to the seat back, assemble the three parts on-site and lock the claws of the bracket into the locking holes of the receiver, then align both mounting holes concentrically and insert the mounting screws into both holes. and screw it onto the female thread of the receiver.

``Problem that the invention aims to solve'' However, because of the tension spring that connects the lever and bracket, it takes force to align both mounting holes concentrically, which hinders work efficiency. In addition, workers' fingers hurt and even got injured.

``Means for Solving the Problems'' The purpose of the locking mechanism of this invention is to eliminate the above-mentioned drawbacks and improve work efficiency, and its gist is as follows.

The bracket has a fitting hole and a mounting hole for screwing the lever together with the receiver.

The lever has a recess for engaging and disengaging the lock pin, a mounting hole for screwing to the receiver, and a fitting hole that is inserted through the bracket, with the mounting hole and the mounting hole of the bracket being concentric. and a protrusion that is sheared by rotation of the lever.

The bracket and lever are connected by a tension spring.

``Function'' The locking mechanism, which is composed of three parts, is assembled as a single unit with both mounting holes concentric, so the claw of the bracket locks into the locking hole of the receiver, and both insertion holes Install the lock mechanism by screwing the mounting screw into the female thread of the receiver. The protrusion is sheared with the first rotation of the lever.

``Effects'' Since the work of installing the lock mechanism is extremely easy, work efficiency is improved.

Further, unlike the conventional method, the operator's fingers are not injured during assembly. Since the protrusion is sheared off by the first rotation of the lever, it does not interfere with subsequent lever operations.

``Example'' This invention will be described in detail below based on the illustrated example. Note that the drawing shows the locking mechanism for the left side, and the locking mechanism for the right side is symmetrical to this.

This locking mechanism A is composed of three parts: a lever 1, a bracket 6, and a tension spring 12.

As shown in Figure 2, reference numeral 1 is a lever made of hard synthetic resin, such as nylon resin, which has a core metal inside, and a lock pin 2 fixed to the vehicle body on the bottom surface.
1 is provided with a recess 2 that engages and disengages. 3 is a mounting hole through which the mounting screw 22 is inserted. Reference numeral 4 denotes a protrusion, which is convenient for positioning the bracket 6 provided on the outer periphery of the mounting hole 3.

5 is a small-diameter shaft-shaped protrusion that is a feature of this invention.
It is provided protrudingly between the recess 2 and the mounting hole 3.

This lever 1 is exactly the same as the one for the right side, so
The protrusion 4 and the protrusion 5 are provided integrally with the lever 1 on the front and back sides.

Next, in FIG. 3, reference numeral 6 denotes a steel bracket, which is formed in a hook shape. A claw 8 is provided which is engaged with a engagement hole in the receiving plate. Reference numeral 9 represents a retaining rod for the lock pin 21, and reference numeral 10 represents a rubber damper. 11
is a fitting hole, which is penetrated at a position corresponding to the protrusion 5 of the lever 1 on the surface where the mounting hole 7 is provided. 1 to the bracket 6. For this purpose, it is also possible to provide a plurality of sets of the protrusion 5 and the insertion hole 11.

Reference numeral 12 denotes a tension spring that connects the lever 1 and the bracket 6, and a locking hole 13a provided on the lever 1 side.
Both ends are locked in locking holes 13b provided on the bracket 6 side.

This locking mechanism A is performed as follows. First, the attachment hole 3 of the lever 1 and the attachment hole 7 of the bracket 6 are made concentric, and the protrusion 5 is inserted into the insertion hole 11. Then, the lever 1 and the bracket 6 are connected by the tension spring 12 as described above. Figure 1 shows the lock mechanism assembled in this way.
FIG. 4 shows a state in which this locking mechanism A is attached to a seat bag B.

Note that if the lever 1 is provided with the protrusion 4,
By simply fitting the outer periphery of the mounting hole 7 of the bracket 6 into the inner periphery of the protrusion 4, both the mounting holes 3 and 7 become concentric, so it is sufficient to insert the protrusion 5 into the insertion hole 11 as is.

Further, the protrusion 5 is made of hard resin and is integrally formed with the lever 1, and the portion protruding from the surface of the bracket 6 is easily sheared when the lever 1 is rotated for the first time, so that the protrusion 5 is formed integrally with the lever 1. I have no reservations about the operation.

[Brief explanation of the drawing]

FIG. 1 is a side view of the locking mechanism, FIG. 2 is a perspective view of the lever, and FIG. 3 is a perspective view of the bracket.
FIG. 4 is a side view of the lock mechanism attached to the seat bag. 1... Lever, 2... Recess, 3... Mounting hole, 5
...Protrusion, 6...Bracket, 7...Mounting hole, 1
1... Fitting hole, 12... Tension spring, A... Lock mechanism, B... Seat back.

Claims (1)

[Scope of utility model registration request] It consists of a bracket fixed to the receiver of the seat back frame, a lever rotatably attached to the bracket, and a tension spring connecting the bracket and lever. The lever has a recess for engaging and disengaging the lock pin on the vehicle body side, a mounting hole for screwing to the receiver, and a mounting hole that is concentric with the mounting hole of the bracket. A locking mechanism for a foldable seat bag having a protrusion that is inserted into a fitting hole of a bracket and sheared by rotation of a lever.