JPH021792Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to the improvement of a lock, and in particular, the lock body has a switch chamber and a key insertion hole, and a key can be inserted into and removed from the key insertion hole. This invention relates to an improvement in a lock that can be opened freely by operating a switch in a switch chamber in response to insertion of the key into a key insertion hole.

(Prior art) Conventionally, this type of lock, especially a lock in which a switch chamber is provided in the lock body, has
-As proposed in Publication No. 42188, the switch is cut by a key thread formed on the side edge of the key, and a designated switch is operated by a number of keys each having a different key thread. There was something that we had the advantage of being able to purchase.

However, because the number of switches increases or decreases depending on the length of the key insertion hole, it is not possible to link more than the appropriate number of switches with a key insertion hole of a certain length. There's a problem.

The present invention was developed in view of these circumstances, and allows the key for each switch to be inserted into the key insertion hole and the specified switch to be cut. This provides a lock that can be freely cut with a strip key that inserts and removes a switch circuit secured in the same hole into the same hole, and its gist is that the lock body has a switch chamber and a key insertion hole,
When the lock is inserted into and removed from the key insertion hole, the pin tumbler inserted into the pin hole is pushed up in response to the insertion of the lock into the key insertion hole, and the contact piece provided in the switch chamber comes into contact with the switch contact. In the lock, the key insertion hole is a wide hole, and the key insertion hole is arranged in multiple rows across the wide hole and the switch chamber, and further along the insertion direction of the key insertion hole. A large number of pin holes are formed in a substantially staggered manner, and pin tumblers are fitted into the pin holes in a substantially staggered manner, and the lock is long in the wide insertion direction corresponding to the wide key insertion hole. The key is a band-shaped key, and the band-shaped key has a grip at the rear end, and the upper surface of the key piece has a large number of protruding cords arranged in a staggered manner along the long direction from the tip to the grip. To provide a new lock which overcomes the conventional drawbacks by providing a lock characterized by a protruding structure.

An example of implementing the present invention will be described below based on the drawings.

The lock 1 has a key insertion hole 2 with a substantially elongated cross section on its front side.
The wide hole surface 2 of this key insertion hole 2 is opened.
A switch chamber 3 is formed on the upper surface facing a, and an appropriate number of pin holes 4 are arranged in a substantially staggered manner along the direction of the insertion hole and penetrated across the wide hole surface 2a and the switch chamber 3, Each pin hole 4 has a pin tumbler 5 inserted into the key insertion hole 2 with a protruding cord of the key A.
A ₁ is pushed and stored in the switch chamber 3 side so that it can be moved freely, and each pin hole 4 on the switch chamber 3 side has a contact piece 6.
are respectively provided so as to be pushed up by the pin tumbler 5 to come into contact with the switch contact 7. The lock main body 1 also has a cover plate 8 which is in the form of a printed circuit board with each switch contact point 7 embedded in its surface and which closes the switch chamber 3 in a hermetically sealed manner. Connecting terminals 10, which are in contact with each switch contact 7 while fixing the base end of each switch 6, are placed in grooves 11
They are fixed inside each other in a fitting manner.

The pin 12 is urged into the key insertion hole 2 by a spring 13, and provides a certain amount of sliding resistance to the key A inserted into and removed from the hole.

The key A is a long strip in the insertion direction that can be inserted into the key insertion hole 2, and has a grip at the rear end as shown in the figure, and a long strip on the top surface extending from the tip to the grip. A protruding cord A ₁ is provided protruding along the line, and the protruding cord A ₁ is formed so as to push up a predetermined pin tumbler 5 and cut into the target switch circuit. In the drawing, when there are five switch circuits consisting of one set of contact pieces 6 and switch contacts 7, the same number as the number of pin tumblers 5,
Key A with 75 different codes can be obtained. Further, the key A is formed into a strip-like shape that is elongated in the insertion direction by pressing or die-casting.

In the above embodiment, the number of switch circuits is the same as the number of pin tumblers 5, but the number is not limited to this, and the number can be reduced as desired, and desired combinations of the switch contacts 7 and the cover plate 8 can be made.

(Effect of the invention) As mentioned above, the present invention makes the key insertion hole of the key body a wide hole, and inserts a strip-like key having a corresponding shape that is long in the insertion direction into the wide key insertion hole. In addition, the pin tumbler is activated by a protruding cord placed on the top surface of the strip-shaped key along the long direction from the tip to the grip, making it work like a conventional lock. By arranging the pins in a substantially staggered manner, the depth of the switch part of the lock body is shortened, making it possible to downsize the lock body and also to shorten the length of the key itself. , the lock has the advantage of being miniaturized and has a large number of operating circuits incorporated therein, and by combining the number of pin tumblers and switch circuits, it is possible to obtain many types of keys with different arrangements of protruding cords. It has many advantages such as simple structure, easy manufacture, and easy operation.

[Brief explanation of the drawing]

FIG. 1 is a partially cut away plan view showing an embodiment of the key of the present invention. Figure 2 is a vertical front view taken along the X-X line, Figure 3 is a vertical side view taken along the Y-Y line, Figure 4 is a perspective view, Figure 5 is an exploded perspective view, and Figure 6 is the book. It is a perspective view showing an example of the key used before the key of the invention. In the figure, 1 is the switch body, 2 is the key insertion hole, 2a
is a wide hole surface, 3 is a switch chamber, 4 is a pin hole, 5
is a pin tumbler, 6 is a contact piece, 7 is a switch contact,
A is a key, A ₁ is a protruding cord.

Claims (1)

[Scope of utility model registration request] Equipped with a switch chamber and a key insertion hole in the lock body,
When the key is inserted into and removed from the key insertion hole, the pin tumbler inserted into the pin hole is pushed up in response to the insertion of the key into the key insertion hole, and the contact piece provided in the switch chamber comes into contact with the switch contact. In the lock, the key insertion hole is a wide hole, and the key insertion hole is arranged in multiple rows across the wide hole and the switch chamber, and further along the insertion direction of the key insertion hole. A large number of pin holes are formed in a substantially staggered manner, and a pin tumbler is fitted into each pin hole in a substantially staggered manner, and the key is inserted in the wide insertion direction in correspondence with the wide key insertion hole. The key has a long strip-shaped key, and the strip-shaped key has a grip at the rear end, and the upper surface of the key piece has many protrusions arranged in a staggered manner from the tip to the grip. A lock characterized by a protruding cord.