JPS6217311Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking device for forward-folding seats such as automobile armrests and trunk-through seats (seats that connect the interior of the vehicle and the trunk room by folding forward).

As shown in Fig. 1A, this type of general locking device is designed to lock a trunk-through seat a' by pushing up a lever 1a provided at the top of the back of a seat bag a in the direction of the arrow against the elastic force of a spring 1e. The structure is such that the lock pin 1b that engages with the top of the trunk is released, and then the strap 1c provided on the trunk-through seat a' is pulled in the direction of the arrow to fold the seat a' forward. Therefore, this conventional product is a trunk-through seat.
Lever 1a and strap 1c to move forward a'
Because double operations were required, there was a problem with the operability.

Therefore, the inventor of the present invention proposed a locking device shown in FIG. This is a trunk through seat
Release plate 1d slidably provided on a'
Connect the strap 1c to the release plate 1.
d, the push-up part pushes up the lock pin 1b urged by the spring 1e to release the lock, and then the seat a' is moved forward by pulling the strap 1c. Therefore, with this structure, the lock can be released and the trunk through seat a' can be moved forward by simply operating the strap 1c, thereby eliminating the problems of the conventional product.

However, according to this structure, the release plate 1d can be unlocked by pushing up the lock pin 1b.
This is done by sliding the lock pin 1b.
The lower end of the release plate 1d hits the release plate 1d, making it impossible to insert it deeply, which impairs the reliability of the locked state.

Further, if the lock pin 1b is configured to be inserted deeply, the amount of sliding may become large due to the angle θ of the push-up portion of the release plate 1d. Furthermore, it was confirmed that in this proposed product, the sliding direction of the release plate 1d and the moving direction of the lock pin 1b are different, so that the strap 1c cannot be moved forward unless the strap 1c is strongly pulled.

The present invention aims to eliminate such problems.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 7.

In the figure, a shows a seat bag fixed to the wall of the vehicle body constituting the trunk room.
a′ (trunk through seat) to pivot shafts 11, 11
It can be installed so that it can be raised or lowered freely. A window is formed in the wall corresponding to the forward-folding seat a' so that the interior of the vehicle and the trunk room communicate with each other when the forward-folding seat a' is folded forward.

Then, the seat frame of the seat back a located above the forward-folding seat a' in the upright state is used as a fixing member 12, and a U-shaped mounting piece 13 is welded to this fixing member 12, and the lock pin 1 is moved in the vertical direction. The lock pin 1 is inserted freely through the lock pin 1, and a spring 14 is wound around the lock pin 1 to urge the lower end of the lock pin 1 to protrude in the direction of the forward-folding seat a'.

2 in the figure is the forward folding seat that lock pin 1 engages with.
A locking plate with a locking hole 2a provided on the top surface of a' is shown,
This locking plate 2 is attached to the front folding seat as shown in Fig. 3.
It is welded to the box-shaped frames 15a and 15b that constitute a'. The frames 15a and 15b are made by fitting together a frame-like frame 15a made of a metal member and a dish-like frame 15b made of a hard material such as synthetic resin into a substantially saucer-like shape. Locking hole 2a of locking plate 2 in 15b
A through hole 2a' having the same shape as the locking hole 2a is opened at a position corresponding to the locking hole 2a. 15b' is a dish-shaped frame 15
This is the guide groove provided in b.

The locking plate 2 has the locking hole 2a formed in the flat part of the top thereof, and the knob bracket 3 is rotatably attached with a pin 16 between the left and right bent portions 2b, 2b of the lower part. A wire guide rod 6 is annularly welded to the upper portions of the portions 2b, 2b.

As shown in FIG. 4, the knock bracket 3 has mounting portions 3b, 3b bent at right angles on the left and right sides, and a curved push-up portion 3 at the front that can be freely inserted into and removed from the locking hole 2a.
a, a hook hole 3c for hooking a spring 4 is provided at the rear, and the spring 4 is stretched across this hook hole 3c and the lower part of the locking plate 2, and the pushing part 3a is biased in the direction of retraction relative to the locking hole 2a of the locking plate 2.

The strap shown at 5 in the figure constitutes a lock release mechanism, and its one end is fixed to the rear of the lock bracket 3, and the other end is passed through the guide rod 6 and attached to the front end seat.
It is provided so as to protrude outside of a'.

The operating state of this product will be explained based on FIGS. 5 to 7. FIG. 5 shows the locked state, in which the lock pin 1 is moved forward by the spring force of the spring 14.
a' is inserted into the locking hole 2a, and the push-up part 3a of the knock bracket 3 is inserted into the locking hole 2a by the tensile force of the spring 4.
It is immersed downward.

Therefore, when the strap 5 is pulled in the direction of the arrow against the tensile force of the spring 4, the knock bracket 3 rotates, and its push-up part 3a pushes up the lower end of the lock pin 1 and projects upwardly from the locking hole 2a, thereby locking the lock pin 1.
The locked state is released in order to allow the lock to escape from the locking hole 2a (FIG. 6). When the strap 5 is further pulled, the tip end edge of the push-up part 3a hits the mouth edge of the locking hole 2a, and the rotation of the knob bracket 3 is stopped.

Therefore, the tensile force of strap 5 causes the seat to fold forward.
Since the force acts in the forward direction of a', the forward folding seat a' is folded forward (Fig. 7). Note that when the forward-folding seat a' is raised up, the push-up portion 3 of the knock bracket 3 is recessed below the locking hole 2a due to the tension of the spring 4, so that it is not pushed out by the spring 14. The lock pin 1 is guided by the guide groove 15b' and inserted into the locking hole 2a to be in the locked state.

As mentioned above, the present invention is extremely easy to operate because pulling the strap releases the lock and allows the strap to fall forward. Furthermore, since the direction in which the lock pin engages and the direction in which the lock is released by rotation of the lock bracket are substantially the same, there is no loss in the tensile force of the strap and the strap can be operated with a small amount of force. In addition,
Since the lock bracket is rotatably mounted, there is no restriction on the depth of insertion of the lock pin as in the proposed product. Therefore, the reliability of the locked state can be improved.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

Figure 1 A is a schematic diagram of the conventional product, Figure 1 B is a vertical sectional view of another conventional product, Figures 2 to 7 show the proposed product, and Figure 2 shows the state of use of the proposed product. Perspective view,
FIG. 3 is an exploded perspective view, FIG. 4 is a perspective view of essential parts, and FIGS. 5 to 7 are longitudinal cross-sectional views showing operating states. In the diagram, a is the seatback, a' is the forward-folding seat, and 1
2 is a lock pin, 2 is a locking plate, 3 is a knock bracket, 3a is a push-up part, 4 is a spring, and 5 is a strap.

Claims (1)

[Scope of utility model registration request] A lock consisting of a lock pin that is biased in the direction of the forward-folding seat from a fixing member provided on the seat back corresponding to the upper side of the forward-folding seat in the upright state, and a locking plate with a locking hole provided on the forward-folding seat and engaged by the lock pin. The mechanism includes a knock bracket rotatably provided in the forward folding seat, which is integrally fixed to the knock bracket, and which is movable into and out of the locking hole, and which is attached to the edge of the locking hole when projected above the locking hole. A push-up part that stops the rotation of the knock bracket when it abuts, a spring that urges the push-up part of the knock bracket in the retracting direction, one end fixed to the knock bracket and the other end protruding outside to move the push-up part in the projecting direction. A locking device for a forward-folding seat that is connected to a lock release mechanism consisting of a strap that allows the seat to be folded forward.