JP2595638Y2 - Cylinder lock - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock capable of preventing unauthorized unlocking due to picking and increasing the number of key differences.

[0002]

2. Description of the Related Art For example, when a cylinder lock provided in a vending machine door is in a locked state, a driver pin hole and a tumbler pin hole coincide with each other, and the tip of the driver pin pressed by a spring is engaged with the tumbler pin hole. The vending machine cannot be opened because the plug cannot be turned and the tongue provided at the tip of the plug is engaged with the case of the vending machine.

When a regular key is inserted into a key hole of a cylinder lock in a locked state, a tumbler pin pressed by the key pushes a driver pin, and a contact surface between the tumbler pin and the driver pin contacts an outer peripheral surface (shear line) of the plug. Since the plugs coincide with each other, the plug becomes rotatable. When the plug is rotated to the unlocking angle by the key, the engagement between the tongue provided at the tip of the plug and the case of the vending machine is released, and the door can be opened. Further, since the key does not come off in the unlocked state, forgetting to lock can be determined at a glance, which is convenient and is widely used in vending machines, rockers and the like.

[0004]

The cylinder lock has the following disadvantages. Inserting a picking tool into the keyhole and pressing each tumbler pin to a position that matches the shear line while applying tension to the plug could result in unauthorized unlocking. In order to prevent such an inexperienced person from unlocking illegally, the keyway was complicated to make it difficult for the picking tool to enter, and a step was provided on the pin to prevent the shear line from being detected. However, unauthorized unlocking could not be completely prevented. An object of the present invention is to solve such a problem, and it is possible to provide a highly safe cylinder lock that is not likely to be unlocked only by pushing in a tumbler pin, and furthermore, a cylinder in which the number of key differences increases dramatically. It provides tablets.

[0005]

According to the present invention, a plurality of driver pin holes are provided in a case formed in a cylindrical shape in a normal direction of the case. A keyhole into a plug rotatably inserted into the case, and a keyhole from the keyhole when the plug is in a locked position. A tumbler pin hole communicating with each driver pin hole is provided, and a tumbler pin is inserted into the tumbler pin hole. In a cylinder lock whose end coincides with the outer peripheral surface of the plug, an inclined surface is provided at the tip of the key , and
When the above keys are turned upside down on both sides,
A wedge-shaped recess that matches the set angle with respect to the key width direction
A dimple having a tumbler pin, and one end of the tumbler pin is formed in a wedge-shaped portion that can be engaged with the wedge-shaped recess,
Other end provided collision-like engagement portion, the engagement portion engaged with the engaging portion in the driver pin is provided on the outer peripheral surface of the plug, the engaged portion is slidable shape the annular collision force is circumferentially provided, the engaging portion is provided Kakarigo凹groove slidable shape on the inner peripheral surface of the case, when the wedge-shaped portion of the tumbler pins in the wedge-shaped recess portion of the key has entered engaged , the tumbler pins is rotated, in which the engagement portion is characterized by comprising a slidable orientation along Kakarigo凹groove.

[0006]

In the cylinder lock constructed as described above, in the locked state, the wedge-shaped portion at one end of the tumbler pin is aligned in the width direction of the key. Go凹are cross grooves a predetermined angle.
Further, the engaged portion of the driver pin engages the engaging portion of the tumbler pins, which intersect at a predetermined angle against the annular collision force of the plug, and the tip of the driver pin is engaged into shear line ing.

[0007] In such a locked state, after inserting the picking tool into the keyhole and pushing the tumbler pin toward the shear line, even if the plug is to be rotated, the engaging portion of the tumbler pin is engaged with the engaging recess of the case. collides with the groove, because impinge on the engaged portion of the annular collision caused even driver pin of the plug, the plug is not rotate and can not be incorrect tablets.

[0008] The wedge-shaped recess of the key is located even if the key is turned over.
Because the direction does not change, do not worry about the front and back of the key
Can be inserted well. The direction in which the direction of the tumbler pin engaging portion matches the annular projection of the plug due to the rotation of the wedge-shaped portion
Fixed in direction, the engaging portion of the tumbler pins which are pressed key is slidable along the Kakarigo凹lecture of the case. In addition, the driver pin engaged with the engaging portion is also rotated for correcting the direction of the tumbler pin.
Rotates with movement , and the direction of the engaged part matches the engagement groove
Tumbling pin corrected by the direction and pressed by the key
There therefore pushes the driver pin to shear line, the plug is rotatable.

[0009] The plug can be unlocked by rotating the plug to the unlocking angle by the key. When the plug is returned to the locking angle again and the key is pulled out, the direction of the wedge-shaped portion of the tumbler pin is corrected in the width direction of the key by the inclined surface at the tip of the key, and the locked state is restored.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a cylinder lock A, FIG. 2 is a perspective view showing the relationship among keys, tumbler pins and driver pins, and FIG. FIG. 6 is a longitudinal sectional view of the cylinder lock A in a locked state. As shown in FIGS. 1 and 6, a plurality of driver pin holes 2 formed in a cylindrical shape and penetrating in the normal direction of the case 1 are arranged in the axial direction of the case 1. Grooves 3 connected to each driver pin hole 2 on the outer peripheral surface of case 1
Is formed, and the cover 4 is inserted and fixed in the groove 3.

A driver pin 5 is inserted into the driver pin hole 2, and a spring 6 is inserted between a cover 4 and a spring supporting recess 5 a provided on an end face of the driver pin 5. Biased in a direction protruding from the surface. A flange 7 is provided around the front part (left side in FIG. 1) of the case 1, and opposed flat parts 8 and external threads 9 are provided on the outer peripheral surface other than the flange 7 (see FIG. 1). Then, it is inserted from the rear side of the case 1 into a hole provided in a vending machine door or the like,
The door is attached to the door by clamping the door with a large nut (not shown) screwed to the male screw 9 and the flange 7.

A plug 10 rotatably inserted into the inner peripheral surface of the case 1 includes a key hole 11 opened on the front surface and a plug 10.
Is in the locked position (see FIG. 6), a tumbler pin hole 12 communicating from the key hole 11 to each of the driver pin holes 2 is provided, and a tumbler pin 13 is inserted into each tumbler pin hole 12. The key K to be inserted into the keyhole 11 has an inclined surface 14 formed at the tip, and dimples 15a to 15e facing the tumbler pins 13 when inserted are provided (see FIGS. 2 and 4).

The dimples 15a to 15e are formed in a concave shape having an oval outline, and a wedge-shaped concave portion 16 having a wedge-shaped slope is provided on the bottom surface (see FIG. 5).
The direction of the wedge-shaped recess 16 has an angle set with respect to the width direction of the key, and in this embodiment, the dimple 15a
The wedge-shaped recess 16 has a dimple 15
The wedge-shaped concave portion 16 of FIG.
The wedge-shaped concave portion 16 of FIG.
The 5d wedge-shaped recess 16 has an angle of 0 degree, and the wedge-shaped recess 16 of the dimple 15e has an angle of 15 degrees clockwise (see FIG. 4).

One end of the tumbler pin 13 is connected to each wedge-shaped recess 1.
6 is formed on a wedge-shaped portion 17 which can be engaged with the projection 6, and a protruding engagement portion 18 is provided at the other end (see FIG. 7). The shape of each engaging portion 18 is formed in a plate-like shape with both side surfaces parallel to each other, and the direction of each engaging portion 18 is the wedge-shaped portion 1 of each tumbler pin 13.
When the key 7 is engaged in the respective wedge-shaped recess 16, the key K
Is parallel to the width direction. On the other hand, an engaged portion 19 formed in a groove in which the engaging portion 18 can be engaged is provided on the distal end surface of the driver pin 5 (see FIG. 7).

An annular projection 20 having substantially the same cross-sectional shape as the engaging portion 18 is provided on the outer peripheral surface of the plug 10, and the inner peripheral surface of the case 1 An engaging groove 21 having the same cross-sectional shape as the portion 19 is provided around (see FIG. 7). The engaging portion 18 of the tumbler pin 13
Overlaps with the annular projection 20, and when the direction of the tumbler pin 13 is parallel to the width direction of the key K, the tumbler pin 13 is slidable along the engaging groove 21 of the case 1 and the driver pin 5 Can be slid on the annular projection 20 of the plug 10.

The plug 10 is provided with a pin hole 22 penetrating from the keyhole 11 to the outer peripheral surface.
A pin engaging recess 23 having a small inclination angle is provided at a position facing the pin hole 22 when the plug 10 is at the locking angle, and a profile pin 24 is inserted into the pin hole 22. The plug 10 cannot rotate unless the end of the profile pin 24 is separated from the pin engaging recess 23 (see FIG. 6).

On the side surface of the key K, a recess 25 into which the tip of the profile pin 24 can be inserted when the key K is inserted.
Is provided (see FIG. 2), and when the plug 10 is rotated by the key K, the profile pin 24 receiving the pressing force from the pin engaging recess 23 moves in the direction of engaging with the recess 25, so that the plug 10 is turned. Become movable.

A groove 26 is provided on the outer peripheral surface of the plug 10,
After inserting the plug 10 into the case 1, a retaining ring 27 is fitted into the groove 26 (see FIG. 1). Therefore, plug 10
Cannot move in the axial direction. A male screw 29 is screwed into a square portion 28 provided at the rear end of the plug 10, and a tongue (not shown) having a square hole and a rotation amount regulating stopper 3 are provided.
0 after being inserted in a square-shaped portion 28, the pivot amount regulating stopper 30 and tongue grayed is fastened by a nut screwed to the male screw 29 (not shown). This rotation amount regulating stopper 3
0 controls the rotation of the plug 10 from the locked position to the unlocked position.

The operation of the cylinder lock configured as described above will be described in the order of the locked state, key insertion, and unlocking operation, and further, the case of inserting a key with a different key will be described. In the locked cylinder lock A, as shown in FIG. 6, since the driver pin 5 pressed by the spring 6 is engaged in the tumbler pin hole 12, the plug 10 cannot rotate. The tumbler pin 13 pressed by the driver pin 5 has a wedge-shaped portion 17 protruding from the keyhole 11.

Since the wedge-shaped portions 17 of the tumbler pins 13 are aligned in parallel with the width direction of the key, the direction of the engaging portion 18 crosses the engaging groove 21 of the case 1 at a predetermined angle. (See FIGS. 3 and 8). The engaged portion 19 of the driver pin 5 engaged with the engaging portion 18 also crosses the annular projection of the plug 10 at a predetermined angle (see FIG. 3).

In such a locked state, when the picking tool is inserted into the keyhole 11 and the plug 10 is turned while pushing the tumbler pin 13 toward the shear line, the engaging portion 18 of the tumbler pin 13 is
And the annular projection 20 of the plug 10 also collides with the engaged portion 19 of the driver pin 5, so that the plug 10 cannot rotate and cannot be unlocked.

When the regular key K is inserted into the key hole 11, the tumbler pin 13 pressed on the surface of the key K pushes the driver pin 5 into the driver pin hole 2, and when the key K is completely inserted, The wedge-shaped portion 17 of the tumbler pin 13 is the key K
And overlaps with the dimples 15a to 15e and engages with the wedge-shaped recess 16 (see FIG. 9). When the wedge-shaped portion 17 engages with the wedge-shaped recess 16, the tumbler pin 13 rotates, so that the direction of the engagement portion 18 is corrected in the same direction as the annular projection 20 (see FIG. 11).

The position of the engaging portion 18 of the tumbler pin 13 pressed by the key K coincides with the annular projection 20 of the plug 10 (see FIG. 10). Further, the direction of the engaged portion 19 of the driver pin 5 is also corrected in the same direction as the engaging concave portion 21 of the case 1,
The position of the engaged portion 19 coincides with the engagement concave portion 21 (FIG. 10).
reference). Therefore, the plug 10 becomes rotatable.

When the key K is rotated in the unlocking direction, the engaging portion 18 of the tumbler pin 13
0, slide in the engagement groove 21 of the case 1. The profile pin 24 is pushed out of the pin engagement recess 23, and the tip is inserted into the recess 25 of the key K (see FIG. 12).
When the plug 10 rotates to the unlocking angle, the tongue fixed to the rear end of the plug 10 comes off the case of the vending machine, and the door can be opened.

The plug 10 is returned to the locking angle again and the key K
The wedge-shaped portion 17 that comes into sliding contact with the key K when the
However, the direction of the key K in the width direction is corrected by the inclined surface 14 at the tip of the key K, and the key K returns to the original locked state.

Even if the key has a wedge-shaped concave portion 16 at the bottom of the dimple 15, if the key K ₁ has the wrong key, the depth of the dimple 15 is different from that of the regular key K. Does not coincide with the shear line (see FIG. 13), or the direction of the engaging portion 18 does not coincide with the annular projection 20 of the plug 10 (see FIG. 14), and the plug 10 cannot rotate. Become.

Even if the key K is turned over on both sides of the key K,
Dimple 15 whose position and direction do not change with respect to wedge-shaped recess 16
(See FIGS. 4 and 5), the key K is turned upside down.
Angle of the tumbler pin 13
Also, the pushing amount of the tumbler pin 13 does not change at all. Follow
There is no need to worry about the front and back of the key K at all.
The insertion operation is easy.

[0028]

[Effects of the Invention] The present invention is configured as described above, and has the following effects. (1) The engaging portion is provided on the tumbler pin, and the engaged portion is provided on the driver pin. In the locked state, the directions of the engaging portion and the engaged portion have a predetermined angle with respect to the plug moving direction. Even if the picking tool is inserted into the hole and the tumbler pin is pushed up, the plug cannot rotate and the unauthorized unlocking is reliably prevented. Accordingly, the anti-theft property of the cylinder lock is improved, and the reliability is improved. (2) A wedge-shaped recess is provided at the bottom of the dimple of the key, and the direction of the wedge-shaped recess can be set to an arbitrary angle with respect to the width direction of the key. +15 degrees, +30 degrees, 0 degrees, -15 degrees,
Even with five types of -30 degrees, an extremely large number of combinations are possible. By combining this angle combination with a key difference due to the dimple depth, the number of key differences can be further increased dramatically. (3) On both sides of the key, the wedge-shaped recess
Since dimples that do not change position and orientation are provided,
There is no need to worry about the front and back of the
It is easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a cylinder lock.

FIG. 2 is a perspective view showing a key and directions of a tumbler pin and a driver pin when the key is inserted.

FIG. 3 is a perspective view showing directions of a tumbler pin and a driver pin when a key is not inserted.

FIG. 4 is a plan view of a key.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a longitudinal sectional view of the cylinder lock A in a locked state.

FIG. 7 is a sectional view taken along line WW of FIG. 6;

FIG. 8 is a main part front view for explaining a relationship between an engaging portion of a tumbler pin and a plug in a locked state.

FIG. 9 is a longitudinal sectional view of the cylinder lock A showing a state where a regular key is inserted.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a main part front view for explaining the relationship between the engaging portion of the tumbler pin and the plug when the key is inserted.

FIG. 12 is a vertical cross-sectional view showing a state in which a plug is turned by a turning operation of a key.

FIG. 13 is a vertical cross-sectional view of the cylinder lock A showing a state in which a wrong key is inserted.

14 is a sectional view taken along line YY of FIG.

[Explanation of symbols]

 Reference Signs List A cylinder lock K key 1 case 2 driver pin hole 5 driver pin 6 spring 10 plug 11 key hole 12 tumbler pin hole 13 tumbler pin 14 inclined surface 15a to 15e dimple 16 wedge-shaped recess 17 wedge-shaped portion 18 engagement portion 19 engaged portion 20 Annular protrusion 21 engagement groove

Claims (1)

(57) [Scope of request for utility model registration] A plurality of driver pin holes are provided in a case formed in a cylindrical shape in a direction normal to the case, and the driver pins are urged toward the inner peripheral surface in the driver pin holes. A tongue is inserted, and a key hole is provided in a plug rotatably inserted into the case, and a tumbler pin hole communicating with each of the driver pin holes from the key hole when the plug is in the locking position is provided in the tumbler pin hole. When a tumbler pin is inserted and a regular key is inserted into the keyhole, a cylinder lock in which one end of the tumbler pin presses one end against a dimple provided on the key and the other end of the tumbler pin coincides with the outer peripheral surface of the plug. an inclined surface provided on the tip, on both sides of the key
When the above keys are turned over, the arrangement position and key width
With a wedge-shaped recess that matches the set angle
The provided Inpuru, one end of the tumbler pins so as to form the engaging entrant wedge-shaped section in the wedge-shaped recess, a collision-like engagement portion provided at the other end,
Provided engaged portion engaged with the engaging portion in the driver pin, the outer peripheral surface of the plug, the engaged portion is circumferentially provided with annular collision force slidable shape of the case the engaging portion is provided Kakarigo凹groove slidable shape on a peripheral surface, when the wedge-shaped portion of the tumbler pins in the wedge-shaped recess portion of the key has entered engagement, the tumbler pins are rotated, the engaging portion There cylinder lock characterized by comprising a slidable orientation along Kakarigo凹groove.