JPH021409Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a door opening detection structure for an electric lock.

Conventional electric locks have a protruding piece B for detecting open door protruding from the outer plate A in order to detect the opening of the door.When the door D is closed, the protruding piece B for detecting open door
moves against the elastic body F that bounces outward,
It had a structure in which switch C was reversed. That is, door D
When it moves in the E direction and operates to close, the tapered end J of the protruding piece B for detecting opening opens a hole in the elastic body F by the door D, moves in the K direction, and reverses the switch C. . In this structure, the tip taper J of the open door detection protrusion B tapers only on the outside, so if the door approaches from the direction L, which is opposite to the E direction, the tapered surface of the open door detection protrusion B will be on the opposite side. Because of this, it cannot be used. In that case, although the mounting direction has been reversed and used, it becomes necessary to fine-tune the dimensional relationship with the mounting position.
Also, if the movement of the door opening detection cam B is to be a light movement, the force of the elastic body F will be weakened.
If it were made too weak, there was a risk that it would cause a return failure due to the presence of the guide portions M and N.If the stroke was to be made larger, the angle θ of the tapered portion J would have to be made smaller. This has the disadvantage that the above-mentioned problem becomes even more serious.

The present invention aims to improve the above-mentioned drawbacks.

A detailed explanation will be given below according to one embodiment.

In the figure, reference numeral 1 denotes an outer plate made of a metal plate. 2 and 2 are through holes for mounting screws. A detection cam 3 includes a triangular portion 4, protrusions 6 provided at both ends of the bottom portion 5, and a recess 7 provided in the center of the bottom portion 5 for positioning an elastic body. 8 is a dead bolt, and when locking, use the outer plate 1.
It is constructed so that it protrudes from the hole and fits into a recess in the door (not shown). Reference numeral 9 denotes a connector, which is an electrical connection part for power supply to the motor 10, a signal line from an open door detection switch, etc. 11 is a through hole from which the triangular portion 4 of the detection cam 3 projects. 1
2 is an elastic body, one end of which is fixed to the body 13 of the motor 10, and the free end of which is fixed to the bottom 5 of the detection cam 3.
Position it in the recess 7 provided in the center of. In the embodiment of the present application, the elastic body 12 is a linear spring. The middle of this spring is engaged with the cam 14. The cam 14 rotates around the shaft 15, but the detection cam 3
is pushed in, the elastic body 12 is bent, and the cam 14 rotates in the R direction around the shaft 15.
The switch is configured to be operated by a lever (provided inside the container 13) attached to the switch (see Fig. 4B). A guide portion 16 is formed on the wall surface 17. The guide portion 16 has a lower end portion L that is in contact with the inner surface of the outer plate and has a dimension L that is approximately equal to the dimension L between the protruding portions 6 of the detection cam 3 . and radius L'(L'=L+d/2,
Here, d is the radius of the protrusion) and the shape is formed by drawing arcs Q and Q'. [See Figure 4 E].

Thus, when the door is closed from the direction t, the detection cam 3 is prevented from moving at the intersection of the guide part and the inner surface of the outer plate, and serves as a fulcrum, as shown in FIG. 4C. , the triangular part of the detection cam 3 is pushed against the elastic body 12 by the door. At this time, since one of the protrusions serves as a fulcrum, the other protrusion is guided and rotated along the circumferential surface of the guide part, and is pushed in until the triangular part enters the inside of the outer plate.

Also, if the door closes from the s direction,
As shown in FIG. 4 D, the above-mentioned detection cam 3 is as follows.
The protrusion on the opposite side serves as a fulcrum, and the remaining protrusion is rotated and guided along the circumferential side of the guide portion 16 so that it is completely pushed inward from the outer plate. That is, no matter which direction the door is closed, the detection cam 3 is pushed against the elastic body 12 and can operate a switch (not shown).

As described above, the present invention includes an outer plate having a through hole through which the triangular part of the detection cam protrudes, and protrusions provided at both ends of the triangular part and the bottom part connected to the triangular part. an elastic body having one end fixed to press the bottom center of the detection cam outward in order to cause the triangular part of the detection cam to protrude from a through hole provided in the outer plate; a guide portion that protrudes between protrusions provided at both ends of the bottom of the cam and guides the other protrusion to rotate along its circumferential surface with one protrusion of the detection cam as a fulcrum; and the detection cam; Since the door opening detection mechanism is an electric lock that includes a switch that is activated when the door moves by more than a predetermined distance, it is convenient to install and detect openings regardless of the direction in which the door is closed, compared to conventional examples. It is. Furthermore, since the detection cam 3 has a structure in which it is pushed in by rotating around the fulcrums P and P',
Since there is no narrow guide portion M, N as in the conventional example, there is no possibility of return failure even if the elastic body is weak, which is extremely effective in practice.

[Brief explanation of the drawing]

The drawings are diagrams for explaining the door opening detection mechanism of the electric lock of the present invention, and FIGS. 1 and 2 are diagrams for explaining a conventional example, where FIG. 1 is a perspective view and FIG. 2 is a partial sectional view. be. 3 to 5 are drawings illustrating the invention of the present invention, where FIG. 3 is a perspective view, and FIG. 4 is a drawing explaining the door opening detection mechanism of the electric lock of the invention of the present invention, and A is a view cut along the plane formed by α to α in FIG. 3 and viewed from above, FIG. 4B is a partial cross-sectional view seen from direction B in FIG.
3 is a partial sectional view seen from the r direction in FIG. 3. FIG. 4C and 4D are partial sectional views showing the movement of the detection cam 3 when a door (not shown) approaches from directions t and s, and FIG. 4E is a partial sectional view showing the guide 16. FIG. 5 is a perspective view of the detection cam 3. 1... Outer plate, 2... Mounting screw hole, 3
...Detection cam, 4...Triangular part, 5...Bottom, 6
...Protrusion, 7...Central recess, 8...Dead bolt, 9...Connector, 10...Motor, 1
1...hole, 12...elastic body, 13...vessel body, 14
...Cam, 15...Shaft, 16...Guide part, 17
……wall.

Claims (1)

[Scope of utility model registration request] A detection cam comprising: an outer plate having a through hole through which a triangular part of the detection cam protrudes; a detection cam having a triangular part and protrusions provided at both ends of the bottom connected to the triangular part; an elastic body having one end fixed to press the center of the bottom of the detection cam outward in order to cause the triangular part to protrude from the through hole provided in the outer plate; and protrusions provided at both ends of the bottom of the detection cam. When the guide part protrudes between the detection cam and guides the detection cam so that one protrusion of the detection cam is used as a fulcrum to rotate the other protrusion along its circumferential surface, and the detection cam moves by more than a predetermined dimension. An electric lock opening detection mechanism including an activated switch.