JP3068214U - Damie key - Google Patents

Abstract

(57) [Summary] An object of the present invention is to provide a dummy key which is inexpensive and can improve the overall antitheft property. An adhesive part (2) is formed on the back surface of a main body (1) imitating the head shape of a cylinder lock.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a dummy key.

[0002]

[Prior art]

 In general, cylinder locks are frequently used for doors of houses, and various auxiliary locks are also used as supplements to the cylinder locks. Each of them has an appropriate lock section, and the lock section is released by inserting a genuine key having the same lock / unlock code.

[0003] On the other hand, it is generally recognized that it is difficult to completely prohibit a malicious person from completely unlocking the cylinder lock or the auxiliary lock as the main lock. It is thought to have the function of improving the anti-theft property by increasing the time and effort of the user.

In particular, since the auxiliary lock has a lock means for providing a minimum function as a lock, the cost is high and the resistance to an unauthorized unlocking operation is generally low. In addition, the installation of the auxiliary lock requires processing on the door, etc., which is particularly disadvantageous for rent residents.

[0005]

[Problems to be solved by the invention]

 The present invention has been made in order to solve the above-mentioned drawbacks, and has as its object to provide a dummy key which is inexpensive and can improve the overall antitheft property.

[0006]

[Means for Solving the Problems]

 According to the present invention, the above object is achieved by providing a dummy key in which an adhesive portion 2 is formed on the back surface of a main body 1 imitating the head shape of a cylinder lock.

The dummy key according to the present invention does not have a lock portion, but has only a main body portion 1 imitating the head shape of a real cylinder lock, and is attached to a door 4 or the like by an adhesive portion 2 on the back surface. Anyone who attempts to enter the house illegally is provided with an equivalent cylinder lock in addition to the main lock, giving the impression that there are man-hours for illegal unlocking operations such as picking. The anti-theft property is improved.

Further, since the dummy key is attached to the door 4 by the adhesive portion 2, the dummy key can be easily peeled off and removed when unnecessary.

In addition, the dummy key may be configured such that the key insertion groove 3 formed in the main body 1 communicates with the door 4 or the antitheft device operating switch 5 disposed in the main body 1. it can.

The unauthorized unlocking operation is generally performed by inserting a special tool from the key insertion groove 3 and operating a tumbler in the cylinder lock. When a special tool is inserted into the key insertion groove 3 of the dummy key according to the present invention, the antitheft device operation switch 5 is pressed or detected, and the antitheft device 6 is operated, so that the antitheft device can be further improved. As the antitheft device 6, an alarm sound generating device or a device for transmitting a suspicious person intrusion signal to a security company can be used. The antitheft device operation switch 5 can be incorporated in the main body 1 or in the door 4 or the like.

Further, the key insertion groove 3 may constitute a dummy key having a cross-sectional shape into which a key plate for unlocking the main lock is not inserted. Generally, the cross-sectional shape of the cylinder lock is the same as that of the key plate so that only a matching key plate can be inserted. If the key insertion groove 3 of the dummy key is made different from the cross-sectional shape of the key insertion groove of the main lock, that is, the cross-sectional shape of the key plate owned by the family member, the family member can be inserted into the key insertion groove 3 of the dummy key by mistake. As a result, the antitheft device operation switch 5 is not operated, so that the abnormal operation of the antitheft device 6 is eliminated and the reliability is improved.

[0012]

[Embodiment of the invention]

 FIG. 1 shows an embodiment of the present invention. The dummy key is formed by forming an adhesive portion 2 on the back surface of a main body 1 imitating the head of a real cylinder lock. The adhesive portion 2 is formed by applying a double-sided adhesive tape to the back surface of the main body portion 1, and peels off a release paper (not shown) at the time of use and is attached to a door 4 such as a door.

The main body 1 is formed by zinc die casting or the like, and the surface is subjected to an appropriate surface treatment. The main body 1 has at least a key insertion groove 3 and has an appropriate depth D so that it cannot be distinguished from a real cylinder lock in appearance. Further, on the back surface of the main body 1, an appropriate lightening portion 7 is provided as required.

FIG. 2 shows a modification of the present invention. In the description of this modification, components that are substantially the same as those in the above-described embodiment are given the same reference numerals in the drawings, and description thereof will be omitted. In this modification, the key insertion groove 3 penetrates the back surface of the main body 1 and the adhesive portion 2 and is opened to the back surface. The cross-sectional shape of the key insertion groove 3 is such that a key plate for unlocking the main lock cannot be inserted.

On the other hand, a small hole 4 a corresponding to the key insertion groove 3 is provided in the door 4 in a penetrating manner, and a micro switch (a switch 5 for operating the antitheft device 5) fixed to the back surface of the door 4 in the small hole 4 a. ) Is inserted. When the detection lever 5a is operated, the microswitch 5 activates, for example, an alarm device (theft prevention device 6).

Accordingly, in this embodiment, when a special tool for picking or the like is inserted into the key insertion groove 3 in order to illegally unlock the door 4, the alarm device is activated.

In the illustrated example, the antitheft device operating switch 5 is fixed to the door 4 side, but may be incorporated in the main body 1. The switch 5 for operating the antitheft device may be a switch having an electronic detection unit, such as a photocoupler, in addition to a switch having mechanical contacts such as a microswitch.

[0018]

[Effect of the invention]

 As is clear from the above description, according to the present invention, the antitheft property of the entire system can be improved at low cost.

[Brief description of the drawings]

FIGS. 1A and 1B are views showing the present invention, wherein FIG. 1A is a plan view, and FIG. 1B is a sectional view taken along line 1A-1A of FIG.

FIG. 2 is a diagram showing a modification of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body part 2 Adhesive part 3 Key insertion groove 4 Door 5 Antitheft device operation

Claims (3)

[Utility model registration claims] 1. A dummy key in which an adhesive portion is formed on a back surface of a main body portion imitating a head shape of a cylinder lock. 2. A key insertion groove formed in the main body portion, wherein a key,
2. The dummy key according to claim 1, wherein the dummy key communicates with an antitheft device operating switch disposed in the main body. 3. The dummy key according to claim 2, wherein the key insertion groove has a cross-sectional shape into which a key plate for unlocking the main lock is not inserted.