JPH0238679A - Door locking device - Google Patents

Abstract

PURPOSE:To simplify a mechanism without the need of a motor, a gear, and the like, and miniaturize a device to lighten the weight by heating the expandable member of shape memory alloy electrically to reset the member to return to an original shape, and by moving a lock plate rotationally with the resetting force. CONSTITUTION:A first and a second expandable members 13, 15 are formed with shape memory alloy,and are formed in the shapes of shrunk spirals to set shape memory, and are freely expandable at a room temperature, and return to original spiral shapes when heated. After that, the one end of a lock plate 3 is connected to a base 6 via the expansion member 13, and the other end is connected to the base 6 via the expansion member 15, respectively, and into the members 13, 15, a first and a second heaters 16, 17 are respectively inserted. When current is fed to the heater 17 (16) by a lock switch 18 and the member 15 (13) is heated, then the member 15 (13) is reset to come to an original spiral shape, and the other members 15 (13) is freely expanded or shrunk, and so the plate 6 is rotationally moved to perform locking (releasing).

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an automobile door lock device.

(Conventional technology) Does the door lock device have a base fixed to the door? This is a lever installed on the vehicle body side that engages with the lie force, an open lever that releases the engagement between the fork and the striker, and a link member that moves to the lock position and unlock position. When the link member is in the unlock position, when the outer door handle or the inner door handle is operated, the open lever rotates via the link member and the door is opened. When the link member is in the locked position, the open lever cannot be rotated even if the handle is operated, but the door cannot be opened.

The surface lock lever can be rotated electrically by remote control from the outside or by operating a switch from the driver's seat, in addition to manual operation using the inner lock knob or key cylinder.

(Problems to be Solved by the Invention) However, in the case where the lock plate is rotated by electric operation, a motor, gears, etc. are required, and there is a problem that the structure is complicated and the weight increases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a door lock device with a simple structure that can be remotely locked or unlocked by electrical means.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a door lock device that maintains a door in a locked state by rotating a lock plate pivotally attached to a base. Expandable members made of a shape memory alloy having an expandable shape are attached to both ends of the plate so as to connect the lock plate and the base, and either one of the expandable members is electrically heated to expand and contract, thereby changing the lock position. It is rotatably provided in the unrotator position.

(Function) According to the above configuration, when one of the elastic members is electrically heated, the elastic member tries to return to a predetermined shape, but the other elastic member is free to expand and contract. The return force causes the lock plate to rotate in a fixed direction.

Similarly, when the other expandable member is electrically heated, the lock plate rotates in the other direction.

(Example) Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a door lock device according to the present invention, and roughly shows the following:
The open operation rod 11 consists of an oven operation lever 2, a lock plate 3, a link 4, an open lever 5, and a base 6 to which these are attached.

The open operation rod 1 has one end formed into a plate shape and has a long hole 7.
, and the other end is connected to an outer door handle, which can be moved downward in the figure by operating the outer door handle.

The oven operating lever 2 has a hole 8 at one end and a protruding shaft 23, is attached to the base 6 so as to be rotatable about a support shaft 9, and is biased clockwise in the figure by a spring 10. The end of the spring 10 is connected to an inner door handle, and when the inner door handle is operated, the spring 10
It is designed to rotate counterclockwise in the figure against the urging force of.

The lock plate 3 is attached to the base 6 so as to be rotatable about a support shaft 11, and one end is connected to a key cylinder via a key rod 12, and is also connected to the base 6 via a first telescoping member 13. Inner rod on the other end! 4 to the inner lock knob, and is also connected to the base 6 via a second telescopic member 15.

The first elastic member 13 and the second elastic member 15 are made of a shape memory alloy, and are formed into a contracted spiral shape to memorize the shape.They expand and contract freely at room temperature, and return to the original spiral shape when heated. It is expected to return to . Also, this first
A first heater 16. is provided inside the telescopic member I3 and the second telescopic member 15, respectively. A second heater 17 is inserted and attached to the base 6. And this number! Heater 16. The second heater 17 is configured to be supplied with current from a power source 19 by switching the lock switch 18 .

The lock plate 3 can be rotated by any key operation from the outside, inner lock knob operation from the inside, or switching operation of the lock switch 18.

The link 4 has a shoulder portion 20 at the center of the rib, a hole 21 at one end,
It has a long hole 22 at the other end, and a shaft 23 is fitted into the hole 211 at one end along with the long hole 7 of the open operating rod I marked M, so that it can be interlocked with the open operating rod 1 and the oven operating lever 2. and the shaft 24 provided on the lock plate 3 is fitted into the elongated hole 22 at the other end,
It can be interlocked with lock plate 3.

The open lever 5 is attached to a base 6 so as to be able to swing around a support shaft 25. When a drive piece 26 provided at one end is pushed by the shoulder 20 of the link 4, the open lever 5 is moved in a reverse direction. When the door is rotated clockwise, the striker disengages from the claw (not shown) provided on the back side, and the door opens.

In the door lock device configured as described above, when the outer door handle is pulled from the closed state of the door, the open operation rod 1 moves downward in the figure and pushes down the link 4 via the shaft 23. At this time, since the link 4 is guided by the shaft 24 along the long hole 22, it moves in the direction of the arrow in the figure. When the shoulder portion 20 pushes the drive piece 26 of the open lever 5, the open lever 5 rotates counterclockwise in the figure, and the claw portion (not shown) provided on the back side is disengaged from the striker and the door is opened. open.

Further, when the inner door handle is pulled, the oven operating lever 2 rotates counterclockwise in the figure, and the link 4 is pushed down via the shaft 23, so that the door opens in the same manner as described above.

On the other hand, when the internal inner lock knob or external key is locked with the door closed, the lock plate 3 rotates clockwise in the figure, and the link 4 moves in the direction of arrow B in the figure, centering on the shaft 23. It will have to be rotated. Therefore, the shoulder 20 is separated from the drive piece 26 of the open lever 5, and the shoulder 20 does not push the drive piece 26 even if the outer handle or the inner handle is operated, so the door is maintained in the closed state and the door is locked. It becomes possible.

To lock the door using the lock switch 18, switch the lock switch 18 to the right side in the figure, and turn the power supply 19
What is necessary is to supply the current from the 2nd heater 17 to the 2nd heater 17. As a result, the second heater 17 generates heat, and the second elastic member 15 is heated and returns to its original contracted spiral shape, but the other first
Since the telescopic member 13 is telescopic, the second telescopic member 15
The return force causes the lock plate 3 to rotate clockwise in the figure. As a result, the link 4 moves in the B direction and is locked, as described above.

Next, in order to unlock the door using the lock switch 18, the lock switch 18 may be switched to the left side in the figure, and the current from the power source 19 may be supplied to the first heater 16. As a result, as described above, the first elastic member 13 is heated and returns to its original contracted state, so the lock plate 3 rotates counterclockwise in the figure, and the link 4 rotates in the opposite direction to the arrow B. The shoulder portion 20 and the driving piece 26 face each other. Therefore, the door can be opened by operating the outer door handle or the inner door handle.

In the above embodiment, the first elastic member I3 and the second elastic member 15 are formed into a spiral shape, but the shape is not limited to this, and any shape that can be expanded and contracted, such as a zigzag shape, may be used.

Further, in the above embodiment, the first heater 16. Although the second heater I7 is provided, it may be provided close to the outside of these elastic parts R13 and +5.

Furthermore, as in the on-board embodiment, the first. Second telescopic member 13
．． 15 as the first. Heat it with the second heater 16.17 or directly heat it with the first heater. A current may be passed through the second elastic member 13.15 to generate heat.

(Effects of the Invention) As is clear from the above description, according to the present invention, the expandable member made of a shape memory alloy is electrically heated to return to its original shape, and the restoring force is used to restore the lock plate. Since it is rotated, parts such as motors and gears are not required, and the structure is simple, compact, and lightweight.

[Brief explanation of the drawing]

FIG. 1 is a front view of a door lock device according to the present invention. 3... Lock plate, 6... Base, 13.15
...First. 2nd telescopic member, 16.17... 1st. Second heater.

Claims (1)

[Claims] (1) In a door lock device that maintains a door in a locked or unlocked state by rotating a lock plate pivotally attached to a base, a shape memory alloy having an expandable shape at both ends of the lock plate A door lock device characterized in that a telescopic member is attached to connect a lock plate and a base, and is rotatable by electrically heating one of the telescopic members to expand and contract.