JPH0559850A - Cylinder lock - Google Patents

Abstract

(57) [Summary] [Purpose] To completely rotate the key cylinder freely when unlocking the cylinder lock. When the key cylinder 14 is rotated within a certain angle range relative to the sleeve 12 by a regular key 40, the rotor 1 comes into contact with the key cylinder 14 by an inclined surface.
6 is moved in the axial direction to connect the rotor 16 and the lever 18 and release the engagement of the lever 18 with the case 11. Further, by rotating the key cylinder 14, the key cylinder 14 is integrally rotated with the rotor 16 and the lever 18, and the lever 18 is operated. When the key cylinder 14 is rotated by a different key, the key cylinder 14 is held in a state of being connected to the sleeve 12 by the tumbler 13 and is rotated together with the sleeve 12. Therefore, the key cylinder 14 is not connected to the lever 18 via the rotor 16, and rotation of the lever 18 is blocked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device, and more particularly to a cylinder lock having a large resistance to breakage.

[0002]

2. Description of the Related Art A conventional cylinder lock can rotate a regular key into a locked position or an unlocked position on a key cylinder having a tumbler that engages with a groove formed in a case. In the conventional cylinder lock in which the rotation of the key cylinder is prevented by the tumbler that engages with the groove in the case, there is a risk that the lock is broken and the lock is unlocked. Therefore,
For example, as disclosed in Japanese Unexamined Patent Publication No. 1-315569, a free-wheel cylinder lock has been proposed in which the key cylinder freely rotates in the case of improper unlocking in which a rotational force is applied to the key cylinder. There is. This cylinder lock comprises a sleeve rotatably arranged in the case and a key cylinder rotatably supported in the sleeve.

When a regular key is inserted into the key cylinder, the tumbler in the key cylinder is disengaged from the groove formed in the sleeve to rotate the key cylinder relative to the sleeve. be able to. This allows the sliding ring to engage the locking piece actuating member to operate the locking device. Further, when a key of a different type is inserted into the key cylinder, the key cylinder is held by the tumbler in a state of being engaged with the sleeve, so that the key cylinder is slid.
Rotate with Bu. As a result, the lock piece actuating member cannot be rotated, and the lock device cannot be operated.

In such a free-turn type cylinder lock, the key cylinder freely rotates when different kinds of keys are used. For this reason, it is not possible to apply a rotational force that destroys the tumbler, and thus it is possible to give a large resistance force to the destruction.

[0005]

By the way, Japanese Patent Laid-Open No. 1-
The locking device disclosed in Japanese Patent No. 3155569 has a drawback that the key cylinder cannot be operated smoothly after a different type of key is used. That is, the rotated key is inside the lock device.
A torsion spring is provided between the front plate and the key cylinder to automatically return the cylinder to the initial position. When a different kind of key is inserted into the key cylinder and the sleeve and the key cylinder are freely rotated together, the torsion spring generates a reaction force. However, when the key cylinder rotates more than a certain angle, the torsion spring restricts the rotation of the key cylinder. Therefore, there is a risk that the torsion spring will be damaged or destroyed.
However, if the torsion spring is not provided, the key cylinder does not automatically return to the initial position when the key cylinder is rotated by using a regular key, so that the remote locking or unlocking operation is performed. Has the drawback that it becomes difficult. Further, in the lock device disclosed in the above publication, since the torsion spring is provided in the front part of the lock device, there is a risk of freezing in a cold region.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned drawbacks and to provide a cylinder lock in which a key cylinder can be completely freely rotated at the time of illegal unlocking.

[0007]

SUMMARY OF THE INVENTION A cylinder lock according to the present invention has a sleeve rotatably arranged in a case, and a tumbler for engaging the sleeve and rotatably in the sleeve. And a key cylinder arranged. When the key cylinder is rotated by a different type of key, the key cylinder rotates together with the sleeve to prevent the lever from operating. This cylinder lock is arranged between a rotor capable of abutting on an abutting portion of a key cylinder on an inclined surface, and between a lever and a rotor, and presses the rotor against a key cylinder. A first spring, a pin which is arranged in the key cylinder so as to be slidable in the radial direction and which abuts on an inner cam surface formed on the rotor, and a second spring which presses the pin against the inner cam surface. It is provided. When the key cylinder is rotated relative to the sleeve by a regular key, the rotor is moved in the axial direction by the contact of the inclined surface with the key cylinder, and the key cylinder is projected. Connect the protrusion of the lever to the rotor.
Further, by rotating the key cylinder, the key cylinder is rotated integrally with the rotor and the lever. When the key is released, the lever, the rotor and the key cylinder are returned to the locked position by the third spring, and further returned to the locked position by the second spring that presses the pin against the inner cam surface.

A locking member is provided on the case and is moved by the rotor to release the engagement with the lever.

[0009]

Operation: When a regular key is inserted into the key cylinder, the key will
The engagement between the tumbler in the cylinder and the sleeve is released,
The key cylinder can be rotated relative to the sleeve. When the key cylinder is manually rotated from this state, the contact portion of the key cylinder rotates. At this time,
Since the rotor engages with the sleeve that does not rotate and is slidable relative to the sleeve, the rotor contacts the abutment portion of the key cylinder due to the contact with the inclined surface of the rotor. It is moved inward in the axial direction against the elasticity. At this time, the pin provided in the key cylinder slides on the surface of the inner cam surface formed on the rotor against the elastic force of the second spring. The sleeve is held in a non-rotating state with respect to the case.

Then, as the key cylinder rotates,
When the rotor moves axially enough, the rotor separates from the sleeve and engages the lever. Further, the engagement between the locking member and the lever is released as the rotor moves.

Further, when the key cylinder is rotated, the key cylinder engages with the rotor, so that the key cylinder rotates integrally with the rotor and lever against the elastic force of the third spring. Then, the lever is moved to the unlocked position or the unlocked position.
When the hand is released from the key in this state, the lever and the rotor rotate in the reverse direction toward the initial position by the elastic force of the third spring, and then the pin moves toward the rotor by the elastic force of the second spring. The key cylinder is automatically returned to its initial position as it is pressed.

When the key cylinder is rotated by different kinds of keys, the key cylinder is held by the tumbler in a state of being connected to the sleeve, and is rotated together with the sleeve. Therefore, since the key cylinder does not rotate relative to the sleeve, the rotor does not move axially relative to the sleeve. Therefore, the key cylinder is not connected to the lever via the rotor, and the rotation of the lever is blocked.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, a cylinder lock 10 according to the present invention includes a case 11, a sleeve 12 rotatably arranged in the case 11, and a sleeve 12. And a key cylinder 14 rotatably arranged. As shown in FIG. 2, the key cylinder 14 is provided with a plurality of tumblers 13 projecting into the grooves 12a of the sleeve 12.
The key cylinder 14 is held in engagement with the sleeve 12 by the tumbler 13. A rotor 16 and a lever 18 are sequentially provided coaxially with the key cylinder 14, and the E-ring 26 prevents the key cylinder 14 from falling off. The cap 17 is the key cylinder 14 from the case 11.
To prevent the falling off.

As is apparent from FIG. 1, the key cylinder 1
An abutting portion 15 forming an inclined surface is formed on the rotor 4, and the rotor 16 can abut on the abutting portion 15 and the sleeve 12 is provided.
The protrusion 20 that engages with the locking portion 12b is formed. The locking portion 12b of the sleeve 12 is formed as a groove having a width smaller than that of the groove 12a. As shown in FIGS. 6 to 8, the protrusion 20 is formed with a pair of inclined surfaces 20a and 20b.
Further, as shown in FIGS. 7 to 9, a hole 21 is provided on the side opposite to the protrusion 20. The hole 21 has an inner cam surface 22 formed by a V-shaped inclined surface and an arcuate notch 23.
Is provided.

As shown in FIG. 5, the key cylinder 14 is formed with a hole 14a and a protrusion 14b protruding outward in the radial direction, and a pair of pins 24 are arranged in the hole 14a so as to be slidable in the radial direction. It The outer end of each pin 24 abuts the inner cam surface 22 formed on the rotor 16. The second spring 25 presses the pair of pins 24 outward against the inner cam surface 22. The protrusion 14b of the key cylinder 14 is the rotor 1
6 is arranged in the arc-shaped notch 23.

A rotor is provided between the rotor 16 and the lever 18.
A first spring 19 that presses the key 16 against the key cylinder 14 is arranged. The lever 18 is provided with an arcuate projection 30 formed in the axial direction. When the rotor 16 is moved in the axial direction, the protrusion 30 of the lever 18 can engage with the notch 23 of the rotor 16. In addition, a hole 3 to which a rod connected to a lock device (not shown) is connected
1 is provided on the lever 18. Case 11 and Lever 18
A third spring 32 is provided between and. As shown in FIGS. 1 and 3, the sleeve 12 has a groove 12 having a V-shaped cross section.
c is formed. A ball 34, which is pressed by a spring 33, is arranged in the groove 12c. The spring 33 and the ball 34 are held in the hole 11b of the case 11 by the cover 35. An L-shaped locking member 36 is arranged in the hole 11c of the case 11, and the locking member 36 is pressed radially inward by a spring 37. Spring 3
The cover 7 is prevented from falling out of the hole 11c by the cover 38. The locking member 36 can be moved between a radially inner locking position for engaging the lever 18 and a radially outer non-locking position for disengaging the lever 18, and the spring 37 constantly provides elasticity. It is biased to the locked position. The locking member 36 has an engaging end portion 36 a that abuts the lever 18, and an inclined surface 36 b that abuts the rotor 16. When the rotor 16 is moved in the axial direction, the rotor 16 contacts the inclined surface 36b of the locking member 36 to move the locking member 36 from the locking position to the non-locking position. When the locking member 36 is in the locked position, the rotation of the lever 18 is blocked, but when the locking member 36 is in the unlocked position, the lever 18 is rotatable.

In the above structure, when the key 40 is not inserted into the cylinder lock 10, the sleeve 12, the key cylinder 14 and the lever 18 are in the locked state shown in FIGS. When the regular key 40 is inserted into the key cylinder 14, the tumbler 13 and the sleeve 12 in the key cylinder 14 are inserted.
And the key cylinder 14 is released from the sleeve 12
Can rotate relative to. When the key cylinder 14 is manually rotated from this state by an angle of about 10 °,
The abutting portion 15 of the key cylinder 14 is the protruding portion 2 of the rotor 16.
It contacts the inclined surface 20a or 20b of 0. At this time, the sleeve 12 is held stationary by the spring 33 and the ball 34, and the protrusion 20 of the rotor 16 is engaged with the locking portion 12b of the sleeve 12 which does not rotate. So
The rotor 16 is moved to the first position by the contact portion 15 of the key cylinder 14.
The spring 19 is moved inward in the axial direction against the elasticity of the spring 19. At this time, the pin 2 provided in the key cylinder 14
4 slides on the surface of the inner cam surface 22 formed on the rotor 16 against the elasticity of the second spring 25, as shown in FIG.

After that, when the key cylinder 14 is rotated at an angle of about 30 °, the rotor 16 is sufficiently moved in the axial direction as the key cylinder 14 rotates. As shown in FIG.
The protrusion 20 of the rotor 16 is the locking portion 12b of the sleeve 12.
Away from. At this time, as shown in FIG. 13, the projection 14b of the key cylinder 14 contacts the end of the arc-shaped notch 23 of the rotor 16 to engage the key cylinder 14 and the rotor 16. Are combined. Further, as shown in FIGS. 11 and 14, the notch 23 of the rotor 16 is engaged with the protrusion 30 of the lever 18. The locking member 36 is moved from the locked position to the non-locked position by the rotor 16 against the elastic force of the spring 37, and the lever 18 becomes rotatable.

When the key cylinder 14 is further rotated while the key cylinder 14 is engaged with the rotor 16 and the lever 18, the key cylinder 14 resists the elasticity of the third spring 32 and rotates. 16 and lever 18 are rotated together,
As shown in FIG. 15, the lever 18 is moved to the unlocked position or the locked position.

When the hand is released from the key 40 in this state, the third
Due to the elasticity of the spring 32 of the lever 18 and the rotor 1
After the reverse rotation of 6 toward the initial position, the pin 24 is pressed toward the rotor 16 by the elastic force of the second spring 25, so that the key cylinder 14 is automatically returned to the initial position. .. Further, the rotor 16 is also the first spring 1
9 returns it to the initial position shown in FIGS. Further, the locking member 36 is also moved from the non-locking position to the locking position by the spring 37.

When the key cylinder 14 is rotated by different keys, the key cylinder 14 is held in a state of being connected to the sleeve 12 by the tumbler 13 and is rotated together with the sleeve 12. Therefore, the protrusion 20 of the rotor 16 is engaged with the locking portion 12b of the sleeve 12, and the key cylinder 14 is engaged.
Does not rotate relative to the sleeve 12,
The rotor 16 does not move in the axial direction relative to the sleeve 12. Therefore, the ball 34 is pushed outward from the groove 12a of V-shaped cross section formed in the sleeve 12 against the elastic force of the spring 33. Therefore, the key cylinder 14 and the rotor 16 integrally rotate freely. In this case, since the relative rotation between the key cylinder 14 and the rotor 16 cannot be obtained, the key cylinder 14 is rotated through the rotor 16 to the lever 18
Not linked with. Further, since the locking member 36 is held at the locking position where it is locked by the lever 18, the lever 18 is prevented from rotating.

Thus, the cylinder lock 1 according to the present invention
At 0, the key cylinder 14 is rotated together with the sleeve 12 at the time of illegal unlocking, and the rotation of the lever 18 is blocked. Therefore, a large external force is not applied to the tumbler 13 at the time of illegal unlocking, and a large resistance against breakage is obtained.

The embodiment of the present invention is not limited to the above embodiment, but various modifications can be made.

For example, in the above-mentioned embodiment, the example in which the disc tumbler is used as the tumbler 13 is shown, but it is also possible to use the pin tumbler. In addition, the contact portion 15
It is also possible to form the rotary member that rotates integrally with the key cylinder 14 without forming the key cylinder 14.

[0026]

As described above, according to the present invention, since a cylinder lock having a great resistance to breakage can be obtained, it is possible to effectively prevent a crime such as illegal intrusion or theft.

[Brief description of drawings]

FIG. 1 is a sectional view of a cylinder lock according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an exploded perspective view

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a sectional view taken along the line CC of FIG.

FIG. 6 is a plan view of the rotor.

7 is a sectional view taken along the line AA of FIG.

FIG. 8 is a sectional view taken along line BB of FIG.

FIG. 9 is a bottom view of the rotor.

FIG. 10 is a side view of the rotor.

11 is a cross-sectional view taken along the line BB of FIG. 1 showing a state where the locking member has moved to the non-locking position.

12 is a sectional view showing a state in which the key cylinder of FIG. 5 is rotated by an angle of 10 °.

13 is a cross-sectional view showing a state where the key cylinder of FIG. 5 is rotated by an angle of 30 °.

FIG. 14 is a cross-sectional view showing a state in which the key cylinder of FIG. 1 is rotated by an angle of 30 °.

FIG. 15 is a cross-sectional view showing a state in which the key cylinder of FIG. 5 is rotated by 90 °.

[Explanation of symbols]

10. ． Cylinder lock, 11. ． Case, 12. ． Three
Bu, 13. ． Tumbler, 14. ． Key cylinder, 1
5. ． Contact part, 16. ． Rotor, 18 ... Lever, 1
9. ． First spring, 20. ． Protrusions, 22. ． Inner cam surface, 24. ． Pin, 25. ． The second spring,
40. ． Key, 32. ． Third spring, 36. ． Locking member,

Claims (2)

[Claims] 1. A sleeve rotatably arranged in a case.
And a key cylinder which is engageable with the sleeve by a tumbler and is rotatably arranged in the sleeve. When the key cylinder is rotated by a different key, the key cylinder slides. In a cylinder lock that rotates together with a lever to prevent the operation of a lever, the rotor is disposed between the lever and the rotor, the rotor being capable of abutting on the abutting portion of the key cylinder on an inclined surface. A first spring for pressing the rotor against the key cylinder, and a radially slidable arrangement in the key cylinder and a rotor.
A pin that comes into contact with the inner cam surface formed on the rotor and a second spring that presses the pin against the inner cam surface are provided, and the key cylinder is rotated relative to the sleeve by a regular key. When this happens, the rotor is moved in the axial direction by the contact with the key cylinder on the inclined surface, the protrusion of the key cylinder and the protrusion of the lever are connected to the rotor, and the key cylinder is further rotated. By doing so, the key cylinder is rotated together with the rotor and lever, and when the hand is released from the key, the lever, rotor and key cylinder are returned toward the lock position by the third spring, and the inner cam surface is further moved. A cylinder lock that is returned to the locked position by a second spring that presses the pin against. 2. The cylinder lock according to claim 1, wherein a locking member is provided on the case and is moved by the rotor to release the engagement with the lever.