JPH0143946Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a locking device for fixing a movable member such as a tilting seat to a fixed member such as a vehicle body.

Conventionally, as the above-mentioned locking device, a striker is provided on a movable side member, while a locking member which can be freely engaged with and detached from the striker is pivotally supported on a fixed side member, and this locking member is always engaged with the striker by a spring. It is known that the lock member can be disengaged from the striker by rotating the lock member against the biasing force of the spring. When the lock member is rotated in the direction of disengaging the striker, the spring force increases linearly due to the characteristics of springs, resulting in poor operation feeling and the spring force at the position where the lock member engages with the striker. There was a problem that I could not make it very large.

This invention was made in view of the above-mentioned problem, and uses a minimum number of parts so that the spring force becomes almost flat within a predetermined rotation range of the lock member in the direction of releasing the engagement with the striker. The object of the present invention is to provide a locking device which has excellent operating feeling, can increase the spring force at the position where the locking member engages with the striker, and is therefore reliable in locking and is inexpensive. do. Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of an automobile body 20 equipped with the locking device of this invention, in which the front passenger seat has both lower ends of the seat back 1 hinged to the rear end of the vehicle body floor or engine cover below the body back panel 4. 1', and the seat bag 1 is constructed in a seat form that can be tilted to the position shown by the dashed line in the figure. On the other hand, a reinforcement 5 is fixed to the vehicle body back panel 4 at a height corresponding to the upper edge of the seat back 1 in the vehicle width direction.

The locking device of this invention for fixing the seat back 2, which is a movable member, to the vehicle body back panel 4, which is a fixed member, in the upright position is disposed between the upper edge of the seat back 2 and the reinforcement 5.

That is, in FIGS. 2 to 5 showing the structure of the locking device of this invention, at the center of the upper edge of the seat back frame 2 on the back of the seat back 1, there is a striker 3 formed by bending a round bar into a substantially U-shape. is fixed in a horizontal position with its central engaging portion 31 protruding rearward.

On the other hand, a seat plate 6 made of a metal spring material is fastened to the reinforcement 5 at a position corresponding to the striker 3 with bolts 9, 9.
The seat plate 6 has both left and right ends bent forward into a U-shaped cross section, and between the bent pieces 61, 61, a locking member 10 having an overall L-shape and having a hook 13 and a handle 12 at both ends is installed. A hook 13 is rotatably connected to the striker 3 by a support shaft 11 so as to be detachable from the striker 3. The hook 13 is adapted to engage with the striker 3 from below, and the upper front end thereof is an inclined surface inclined rearward. On the other hand, the handle 12 has an L-shaped tip and protrudes above the seat back 1, and a hook 13 is connected to the striker 3.
The base end thereof comes into contact with the seat plate 6 at the position where it engages with the seat plate 6.

Further, an arcuate spring piece 63 is formed by cutting and raising the central part of the seat plate 6 between the bent pieces 61 and 61 at both ends of the seat plate 6, and an arcuate engagement surface at the tip of the cut and raised spring piece 63 63a is brought into contact with the back surface of the hook 13 of the locking member 10, and the locking member 10 is constantly biased in the direction in which the hook 13 engages with the engaging portion 31 of the striker 3.

Then, the lock member 10 cuts and bends the contact surface 14 with the spring piece 63 within a predetermined rotation range of the lock member 10 in the direction of releasing the engagement with the striker 3. It is formed into a cam shape so that the spring force is almost flat.

The lock member 10 is an integrally molded product made of synthetic resin, and has support shafts 11, 11 protruding on both the left and right sides of the pivot hole 6 provided in the bent pieces 61, 61 at both ends of the seat plate 6.
2 and 62, the locking member 10 is rotatably attached to the seat plate 6, and the locking member 10 is disposed near the support shaft 11 of the locking member 10 in the disengagement direction. Stoppers 16, 16 are provided to limit the rotation beyond the necessary range.

In the figure, 64 is a tightening hole for one of the bolts 9, 9 drilled in the seat plate 6, and the locking member 10 has a working hole 15 for tightening at a position corresponding to this tightening hole 64. It is provided. Note that a hole 65 formed by cutting and raising the central portion of the seat plate 6 to form the spring piece 63 is used as the other tightening hole for the bolts 9, 9.

Next, the operation of the locking device of this invention will be explained.

FIG. 2 shows a state in which the hook 13 of the locking member 10 is engaged with the striker 3, and the seat back 1 is locked and fixed to the vehicle body back panel 4.
Now, in this state, operate the handle 12 to cut and raise the lock member 10 and rotate it counterclockwise in the figure against the biasing force of the spring piece 63, thereby disengaging the hook 13 from the striker 3. Then, the seat bag 1 can be tilted. At this time, the lock member 10 is cut and raised so that the contact surface 14 with the spring piece 63 has a cam shape such that the spring force of the spring piece 63 is almost flat within a predetermined rotation range of the lock member 10 in the disengagement direction. Due to this structure, the spring force of the spring piece 63 does not increase linearly as the lock member 10 rotates in the disengagement direction as in the conventional case, and the operation feeling is excellent.

FIG. 6 is an explanatory diagram showing the change in the contact position of the spring piece 63 due to the rotation of the lock member 10 in the disengagement direction. At position c, which is the maximum rotational position in which the hook 13 and the striker 3 are disengaged from each other by contacting the peak of the cam-shaped contact surface 14 of the lock member 10, the spring piece 63
contacts the trough of the cam-shaped abutment surface 14 of the locking member 10. FIG. 7 is a torque diagram of the spring piece 63 at this time, and it can be seen that the spring force between positions a to c is flat compared to the conventional case. Note that the engagement between the hook 13 and the striker 3 is substantially released at position b in the figure.

After tilting the seat bag 1, the lock member 10
When the user releases the handle 12, the lock member 10 is urged by the spring piece 63 and rotates clockwise in the figure, and the base end of the handle 10 comes into contact with the seat plate 6 and returns to the initial position.

When the seat bag 1 that has been tilted is raised up and fixed to the vehicle body back panel 4, when the seat bag 1 that has been raised is pushed backward, the striker 3 comes into contact with the sloped surface of the front end of the hook 13, and the hook 13 is moved by the biasing force of the spring piece 63. By moving rearward while rotating counterclockwise in the figure against the force, the hook 13 automatically engages with the striker 3, and the seat back 1 is locked and fixed to the vehicle body back panel 4.

As described above, according to this invention, the lock member is always biased in the direction of engagement with the striker within a predetermined rotation range of the lock member in the direction of disengaging the engagement with the striker, using a minimum number of parts. By making the spring force of the spring almost flat, it has excellent operation feeling and can increase the spring force at the position where the locking member engages with the striker. This has the effect of providing a locking device.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a sectional view of an automobile body equipped with the locking device of this invention, FIG. 2 is a side view of the locking device, FIG. 3 is a perspective view of the striker, FIG. 4 is a perspective view of the seat plate and the locking member, and 5 is an exploded perspective view of the two parts shown in FIG. 4, FIG. 6 is an explanatory diagram showing the contact relationship between the spring piece of the seat plate and the lock member, and FIG. 7 is a torque diagram of the spring piece. 1... Seat back, 2... Seat back frame, 3... Striker, 4... Back panel,
5...Reinforcement, 6...Seat plate, 63
... cut and raised spring piece, 10 ... lock member, 11 ...
...Spindle, 12...Handle, 13...Hook, 1
4...Abutment surface.

Claims (1)

[Scope of utility model registration request] A locking device for fixing a movable side member to a fixed side member, in which a striker is fixed to either the movable side member or the fixed side member, and the other fixed side member or movable side member is made of a spring material. A seat plate is fixed, and a lock member having a hook and a handle at both ends is pivotally connected between the bent pieces at both ends of the seat plate so that the hook can be engaged with and detached from the striker, and
The tip of a cut-and-raised spring piece formed between the bent pieces at both ends of the seat plate is brought into contact with the back surface of the lock member on the hook side, and the lock member is always biased in the direction in which the hook engages with the striker. Also, the lock is characterized in that the contact surface of the lock member with the spring piece is formed in a cam shape such that the spring force of the spring piece is almost flat within a predetermined rotation range of the lock member in the disengagement direction. Device.