JP3068814U - Cylinder lock with double prevention mechanism - Google Patents

Abstract

(57) [Summary] [Problem] By simply inserting a blade body into a keyhole of a cylinder lock and rotating the blade body appropriately, a double lock mechanism is activated, and in addition to the conventional lock function, illegal opening is performed. Provided is a cylinder lock with double prevention having a more effective structure for locking and locking. A blade body (3) is provided in a keyhole (2) of a cylinder (1) for locking and unlocking. On one or both sides of the blade body 3, a key groove 4 is formed continuously from the base end to the tip along the central axis of the blade body 3. Cut portions 6 having different angles are formed on one or both sides 5 of the blade body 3. A blade notch 8 is provided at the tip 3a of the blade body 3 so as to fit with the notch 7 provided on the bottom of the cylinder 1.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an improvement in a cylinder lock inserted into a keyhole of a cylinder, particularly, a cylinder lock having a double key mechanism in a key member body.

[0002]

[Prior art]

 Conventionally, a cylinder lock is generally used as a lock attached to a door or the like. However, if the lock is lost or stolen, the lock must be replaced, but there is a risk that another person will unlock the lock until the replacement is completed. The structure of the key member body in this type of conventional cylinder lock consists of a keyway formed continuously from the base end to the tip on the side surface of the blade body inserted into the keyhole and formed on the outer periphery of the blade body. It is regulated by the cut of the peripheral mountain-shaped structure. Therefore, the structure of the key component main body was easily mechanically easily formed, that is, a so-called skeleton key was easily forged.

[0003] In addition, there have been many accidents in which a driver or the like is forcibly inserted into a keyhole corresponding to a blade main body and the lock is illegally unlocked. However, realization is a problem when considering the balance between manufacturing and product prices for general use. Based on past data on this type of accident, the time required for an unauthorized intruder to open the lock and intrude is about three minutes. It is alleged to give up. For this reason, a structure that requires at least about 3 minutes for unauthorized unlocking is required.

In order to ensure safety, a so-called double lock structure in which two locks are attached to one door is adopted, but there is a problem in terms of construction cost.

[0005]

[Problems to be solved by the invention]

 This device has been devised to solve the above-mentioned disadvantages of the conventional situation, and its purpose is to insert the blade main body into the keyhole of the cylinder lock and rotate it as appropriate. A double lock mechanism is operated to provide a cylinder lock with double prevention having a more effective structure for unauthorized unlocking and locking in addition to the conventional locking function.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a cylinder lock with a double prevention mechanism according to the present invention is provided with a blade main body which can be inserted into a keyhole of a cylinder for locking and unlocking, and is provided on one or both sides of the blade main body. A key groove formed continuously from the base end to the tip along the central axis of the blade body is provided, and cut portions having different angles are formed on one or both of the edges of the blade body. In addition, a blade notch is provided at the tip of the blade body so as to fit with the notch provided on the bottom of the cylinder.

[0007] Further, the structure of the blade notch that fits into the notch of the cylinder lock has a mechanical mechanism that has an irregular shape with an arbitrary planar display and that fits in and out of each other. ing.

[0008] Furthermore, the uneven notch structure of the blade notch portion in the blade body in the plane display is formed of an arbitrary impression character, and can be used alone as a seal.

[0009]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of a cylinder with a double prevention mechanism according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, a cylinder 1 is provided with a keyhole 2 into which a blade body 3 can be inserted and withdrawn. A keyway 4 is provided continuously on one or both sides of the blade body 3 from the base end to the tip along the central axis of the blade body 3 as necessary. Further, cut portions 6 having different angles are formed on one or both of the edge portions 5 of the blade body 3. The cut portions 6 having different angles formed on the peripheral portion of the blade body 3 are formed into a shape of a rotary fitting (pintumbler or pin) in a cylinder (cylinder) of the cylinder 1 surrounding the keyhole 2. It is formed together. The key groove 4 formed continuously on the side of the blade main body 3 along the central axis from the base end to the front end also has the same mechanism as that of the cut section 6, and is provided outside the cylinder 1. It is formed according to the shape of the projection of the rotating bracket inside the cylinder.

The front end 3a of the blade body 3 is provided with concaves and convexes on its front surface so as to be fitted and fitted with the notch 7 provided on the bottom of the cylinder 1, and the contact surfaces thereof are mutually formed. The unevenness can be fitted. That is, when the blade body 3 is inserted into the keyhole 2 of the cylinder 1, in addition to the key groove 4 and the cut part 6 provided in the blade body 3, a notch part 7 provided at the bottom of the cylinder body 1 and a blade body The blade main body 3 can be rotated in an arbitrary direction and locked and unlocked under the condition of three required mechanisms composed of the blade notch 8 provided at the tip 3a of the blade 3.

[0012] The structure of the blade notch 8 which fits into the notch 7 of the cylinder lock is configured such that the contact surfaces thereof can be fitted with the concave and convex portions mutually. The planar structure may be a triangular or quadrangular pyramid shape, a triangular or quadrilateral column shape, or a display structure in which English characters or numbers are seen from the front or side.

[0015] Furthermore, the concave and convex notch of the notch portion 8 in the blade main body 3 in a plane display is formed of an arbitrary seal character, and is configured to be used alone as a seal. Therefore, a desired seal can be engraved on the notch 8 of the blade body 3 and used as a seal.

[0014]

[Effect of the invention]

 As described above, according to the cylinder lock with the double prevention mechanism according to the present invention, the key body provided in the blade main body is provided only by inserting and rotating the blade main body for locking and unlocking into the key hole of the cylinder. The three mechanical members of the cut portion having different angles and the blade notch portion attached to the tip of the blade main body can achieve synergistic efficiency in which the three required mechanical members arranged in the cylinder are engaged and matched, and secure locking effect. Obtainable. Furthermore, by providing a notched character as a seal at the tip of the blade body, practical effects such as being able to be used as a normal seal are expected.

[Brief description of the drawings]

FIG. 1 is a side view of a cylinder lock with a double prevention mechanism according to the present invention.

FIG. 2 is a partial cross-sectional view of a cylinder lock with a double prevention mechanism according to the present invention in a locked state in which a cylinder engaging mechanism that engages with a key groove and a cut portion is omitted.

FIG. 3 is a side view showing another embodiment of the cylinder lock with a double prevention mechanism according to the present invention.

FIG. 4 is an enlarged front view of the cylinder lock with a double prevention mechanism according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Keyhole 3 Blade main body 3a Tip 4 Keyway 5 Perimeter 6 Cut 7 Notch 8 Blade notch

Claims (3)

[Utility model registration claims] 1. A blade main body which can be inserted into and removed from a keyhole of a cylinder for locking and unlocking, and is connected to one or both sides of the blade main body from a base end to a front end along a central axis of the blade main body. To provide a continuous keyway,
A cut portion having a different angle is formed on one or both of the peripheral portions of the blade body, and a blade notch portion that fits with the notch portion provided on the bottom of the cylinder is provided at the tip of the blade body. A cylinder lock with a double prevention mechanism. 2. The structure of a blade notch part which fits into the notch part of the cylinder lock has an irregular shape in an arbitrary plane display so that it can be fitted and removably fitted to each other. Cylinder lock with double prevention mechanism. 3. The method according to claim 1, wherein the concave and convex notch of the blade notch portion in the blade main body is formed by an arbitrary stamp character, and can be used as a seal by itself. Cylinder lock with weight prevention mechanism.