JPH0667745U - Variable code type cylinder lock - Google Patents

Abstract

(57) [Summary] [Purpose] The cylinder lock of the axial direction has been changed to the variable code type to improve the anti-theft property. [Structure] A vertical wall surface 7 is formed on an inner peripheral surface 2 of a cylindrical case 1, a plurality of bottomed underpin holes 8 are provided in the vertical wall surface 7, and a spring 9 and an underpin 10 are inserted into the underpin hole 8. Then, the lock cylinder 11 rotatably inserted into the case 1 is provided with the flange portion 11b that slides on the vertical wall surface 7, and the tumbler pin holes 16 facing the respective underpin holes 8 are provided with the flange portion 1b.
1b, and tumbler pin 17 is inserted in tumbler pin hole 16
The variable cord pin 18 is accommodated, and the collar portion 11b is provided with an accommodating recess 19 capable of accommodating the variable cord pin 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an axial cylinder lock of a type in which an internal tumbler pin slides in the axial direction of a cylinder lock when a key is inserted, and relates to a variable code cylinder lock in which a key code is variable to improve anti-theft property.

[0002]

[Prior art]

 Axial cylinder locks are cylinder locks that, when the key is inserted into the keyhole, the internal tumbler pin pressed by the key slides in the axial direction of the cylinder lock, allowing the internal lock cylinder to rotate together with the key. It is commonly known as "80,000 rock". Some of the axial cylinder locks are also of variable code type in order to prevent unauthorized unlocking (see Japanese Patent Publication No. 51-12000).

[0003]

[Problems to be solved by the device]

 The cylinder lock described in the above publication uses a steel ball to prevent picking, and further incorporates a code changing ring to change the key code. However, the structure that moves the steel ball complicates the internal structure of the cylinder lock, and there is the drawback that a jig (code conversion key) is required to change the key code. . The present invention is intended to solve such a problem, and provides a variable cord type cylinder lock that has high anti-theft property, can be easily processed without requiring a special processing machine, and does not require a jig. is there.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a case in which a vertical wall surface is formed in an intermediate portion of an inner peripheral surface of a cylindrical case, and provides bottomed underpin holes at a plurality of positions on the vertical wall surface. A spring and an underpin are inserted into the underpin hole, and a lock cylinder that is rotatably inserted into the case and forms a keyhole between the case and the case is provided with a flange portion that slides on the vertical wall surface. The tumbler pin holes respectively facing the underpins are penetrated through the flange portion, the tumbler pin and the variable cord pin are inserted into at least one of the tumbler pin holes, and the tumbler pin is inserted into the other tumbler pin holes. , A cylinder lock provided with a recess for accommodating a variable code pin on the sliding surface of the collar, and an end surface of the underpin that is aligned with the vertical wall surface when inserted into the keyhole. It is composed of a primary key and a secondary key that pushes the variable code pin into the underpin hole when it is inserted into the keyhole.

[0005]

[Action]

 In the cylinder lock configured as described above, the lock cylinder is rotatably inserted into the inner peripheral surface of the case. When the key is not inserted, the tip of the underpin pushed by the spring is engaged in the tumbler pin hole, so that the lock cylinder cannot rotate.

When the key is inserted in such a locked state, the tumbler pin pushed by the key pushes the variable pin, and the contact surface between the variable code pin and the underpin becomes the shear line which is the vertical wall surface of the case. Match. Therefore, the lock cylinder becomes rotatable, and the lock cylinder can be rotated to the unlocking angle.

When the secondary key is inserted, the tumbler pin pushed by the key pushes the variable code pin, the variable pin is inserted into the underpin hole, and the contact surface between the tumbler pin and the variable code pin is the vertical wall of the case. Match a certain shear line. Therefore, the lock cylinder can be rotated, and the lock cylinder can be rotated to the unlocking angle.However, when the variable pin overlaps the accommodation recess in the middle of the rotation, the variable pin is pushed into the accommodation recess. And changed to a code without variable pins.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. As shown in the longitudinal sectional view of FIG. 1, a cylinder lock has a step portion 2 on the right side on an inner peripheral surface 2 of a cylindrical case 1. A small diameter portion 2b is formed through a, and a groove 3 is provided in the small diameter portion 2b. Further, the sleeve 4 is inserted from the left side of the inner peripheral surface 2, a hole 5 reaching the sleeve 4 from the outside of the case 1 is opened, and the sleeve 4 is fixed to the case 1 by a fixing pin 6 inserted into the hole 5. The end surface of the sleeve 4 forms a vertical wall surface 7 at an intermediate portion of the inner peripheral surface of the case 1.

Underpin holes 8 having a bottom are provided at a plurality of positions (7 positions in this embodiment) on the vertical wall surface 7. A spring 9 is inserted into each of the underpin holes 8 first, and then the underpin holes 8 are inserted. The pin 10 is inserted. Therefore, the tip of the underpin 10 is urged in the direction of protruding from the vertical wall surface 7. The lock cylinder 11 inserted in the case 1 slides on a vertical wall 7 housed in the inner peripheral surface 2 and a tip portion 11a (see FIG. 2A) forming a keyhole 12 with the small diameter portion 2b. It has a collar portion 11b that operates and a shaft portion 11c that is inserted into the sleeve 4.

A groove 13 (see FIG. 2 (A)) that regulates the insertion posture of the key is provided in the tip portion 11a, the rear end portion of the shaft portion 11c projects from the case 1, and the male screw 14 is provided on the outer peripheral surface. After being screwed and the cam 15 is inserted through the outer peripheral surface, the nut 20 is screwed into the male screw 14, and the sleeve 4 and the cam 15 are sandwiched by the nut 20 and the flange portion 11b. Therefore, the lock cylinder 11 can rotate with respect to the case 1 and cannot move in the axial direction.

A tumbler pin hole 16 penetrates through the collar portion 11 b at a position facing each underpin hole 8 when the lock cylinder 11 is at a locking angle, and a tumbler pin 17 is inserted into each tumbler pin hole 16. When the seven tumbler pins are 16a to 16g, the variable code pin 18 is further inserted into the tumbler pin hole 16a (see FIG. 2A) (see FIG. 1). In the present embodiment, the shape of the variable cord pin 18 is a substantially disk shape, but it may be a shape such as a steel ball. Further, on the surface of the collar portion 11b, a housing recess 19 is provided at a position facing the underpin hole 8 when the lock cylinder 11 rotates by a predetermined angle (see FIG. 1).

Next, the operation of the cylinder lock will be described in the order of the locked state, the unlocking operation by the primary key, and the code changing operation by the secondary key. In order to explain the relative relationship of each part, each tumbler pin 17 inserted in each tumbler pin hole 16a, 16b to 16g is designated as 17a, 17b to 17g (see FIG. 2 (A)), and the tumbler pin 17a is locked at the locking position. , 17b to 17g, and the underpin 10 is 10a and 10b to 10g, in the locked state, the tumbler pin 17a is connected to the underpin 10a via the variable cord pin 18 as shown in FIG. , And the other tumbler pins 17b to 17g are in direct contact with the underpins 10b to 17g.

In the locked state, most of the underpins 10 are engaged with the tumbler pin holes 16 so that the lock cylinder 11 cannot rotate (see FIGS. 1 and 4). When the primary key K is inserted into the key hole 12 in such a locked state, each tumbler pin 17a is formed in accordance with the depth of the plurality of operation grooves 20 (7 in this embodiment) provided at the tip of the primary key K. Since ~ 17g is pushed, the end faces of the variable cord pin 18 and the tumbler pins 10b-10g and the contact face with the underpin 10a coincide with the end face of the flange 11b (see Fig. 4 (A ')).

Accordingly, the lock cylinder 11 becomes rotatable, and when the primary key K is rotated by about 45 ° in the locking direction (see FIGS. 2B and 3B), the variable code pin 18 is undercut. The tumbler pins 17b to 17f contact the underpins 10c to 10g (see FIG. 4B). Further, when it is rotated about 45 °, it becomes an unlocking angle, the variable cord pin 18 comes into contact with the underpin 10c, and the tumbler pins 17b to 17e come into contact with the underpins 10d to 10g (see FIG. 4C).

When the primary key K is returned to the locked position, the locked state of FIGS. 1 and 4 is restored, but the variable code pin 19 is still inserted in the tumbler pin hole 17a, and the key code is not changed. When changing the key code, when the secondary key K ₁ is inserted into the key hole 12 of the locked cylinder lock, the variable code pin 18 pushed by the tumbler pin 10a pushes the underpin 10a to move the tumbler pin 10a and Since the contact surface with the variable code pin 18 matches the end surface of the collar portion 11b, the lock cylinder 11 can rotate (see FIG. 5 (A)).

At the intermediate angle when the secondary key K ₁ is rotated about 45 ° in the unlocking direction, the variable code pin 18 in the underpin hole 8a coincides with the accommodating recess 19, so that the pressing force of the spring 9 is applied. The variable code pin 18 present is inserted into the accommodation recess 19 (see FIG. 5 (B)). When the cylinder lock is further rotated about 45 °, the cylinder lock is unlocked, and the cylinder lock is returned to the original locked state by rotating about 90 ° in the locking direction. However, since the variable code pin 18 is still accommodated in the accommodation recess 19, it is converted into a code without the variable code pin 18, the original primary key K cannot be used, and only the secondary key can be used.

[0017]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. (1) Since a variable cord type can be formed without complicating the structure by simply providing a housing recess in a conventional cylinder lock, manufacturing is easy. (2) By inserting the secondary key, it is converted into the code of the secondary key. Therefore, no special jig is needed to change the key code.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a cylinder lock.

FIG. 2 (A), FIG. 2 (B), and FIG. 2 (C) are front views of a cylinder lock at each stage of a locking angle, an intermediate angle, and an unlocking angle.

FIG. 3 (A), FIG. 3 (B), and FIG. 3 (C) are side views of the primary key at each stage of a locking angle, an intermediate angle, and an unlocking angle.

FIG. 4 (A), FIG. 4 (A ′), FIG. 4 (B), FIG.
FIG. 7C is an explanatory diagram of the operation of each pin when the primary key is inserted.

5 (A), FIG. 5 (B), and FIG. 5 (C) are explanatory diagrams of the operation of each pin when a secondary key is inserted.

[Explanation of symbols]

K Primary Key K ₁ Secondary Key 1 Case 2 Inner Surface 4 Sleeve 7 Vertical Wall 8 Underpin Hole 9 Spring 10 Underpin 11 Lock Cylinder 11b Collar 12 Keyhole 16 Tumbler Pinhole 17 Tumbler Pin 18 Variable Code Pin 19 Recessed Recess

Claims (1)

[Scope of utility model registration request] 1. A case having a cylindrical shape and a vertical wall surface formed at an intermediate portion of an inner peripheral surface thereof is provided with bottomed underpin holes at a plurality of positions of the vertical wall surface, and the underpin hole is provided with a spring and an underhole. A lock cylinder, into which a pin is inserted and which is rotatably inserted into the case and forms a keyhole with the case, is provided with a flange portion that slides on the vertical wall surface, and the flange portion is provided with the underpin, respectively. Insert the tumbler pin and the variable code pin into at least one of the tumbler pin holes, and the tumbler pin into the other tumbler pin hole, and insert the tumbler pin into the tumbler pin holes that face each other. A cylinder lock provided with a housing recess into which a code pin can be inserted, a primary key that aligns the end face of the underpin with the vertical wall when inserted into the keyhole, and a primary key that is inserted into the keyhole. Variable code type cylinder lock constructed the variable code pin by a secondary key for pressing the above-mentioned under pin hole when the.