JP3050628B2 - 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 lock device, and more particularly to a cylinder lock having a high resistance to breaking.

[0002]

2. Description of the Related Art In a conventional cylinder lock, a regular key can be rotated to a locked position or an unlocked position on a key cylinder provided with a tumbler which engages a groove formed in a case. In the conventional cylinder lock in which the rotation of the key cylinder is prevented by the tumbler which engages with the groove in the case, there is a risk that the tumbler is broken and the lock is illegally unlocked. Therefore,
For example, as disclosed in Japanese Patent Application Laid-Open No. 1-315569, a free-turn type cylinder lock in which a key cylinder freely rotates when a key cylinder is rotated by improper unlocking has been proposed. I have. The cylinder lock includes a sleeve rotatably disposed 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, and the key cylinder rotates relative to the sleeve. be able to. Thereby, the sliding ring can be engaged with the lock piece operating member to operate the lock device. When a different kind of key is inserted into the key cylinder, the key cylinder is held in a state of being engaged with the sleeve by the tumbler.
Rotate with the gear. As a result, the lock piece operating member cannot be rotated, so that the lock device cannot be operated.

In such a free-turn type cylinder lock, when different types of keys are used, the key cylinder rotates freely. For this reason, since a rotational force for breaking the tumbler cannot be applied, a large resistance to breaking can be given.

[0005]

SUMMARY OF THE INVENTION Incidentally, Japanese Patent Application Laid-Open No. Hei.
The lock device disclosed in Japanese Patent Publication No. 315569 has a disadvantage that the key cylinder cannot be operated smoothly after a different kind of key is used. That is, the rotated key is provided in the locking device.
To automatically return the cylinder to its initial position, a torsion spring is provided between the front plate and the key cylinder. 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, rotation beyond a certain angle limits the rotation of the key cylinder due to the torsion spring. For this reason, there is a risk that the torsion spring is broken or broken.
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 using a regular key, so that a remote locking or unlocking operation is performed. There is a disadvantage that it becomes difficult. Further, in the lock device disclosed in the above publication, since the torsion spring is provided at the front of the lock device, there is a danger of freezing in cold and cold regions.

Accordingly, an object of the present invention is to provide a cylinder lock in which the key cylinder can completely rotate freely at the time of unauthorized unlocking while solving the above-mentioned drawbacks.

[0007]

SUMMARY OF THE INVENTION A cylinder lock according to the present invention is provided with a sleeve rotatably disposed in a case, and a tumbler capable of engaging with the sleeve and rotating in the sleeve. And a key cylinder arranged. When the key cylinder is rotated by a different key, the key cylinder rotates together with the sleeve and the operation of the lever is prevented. This cylinder lock is a rotor which can be brought into contact with a contact portion of a key cylinder with an inclined surface, and a rotor which is arranged between a lever and the rotor and presses the rotor against the key cylinder. A first spring, a pin slidably disposed in the key cylinder in a radial direction and abutting on an inner cam surface formed on the rotor, and a second spring pressing the pin against the inner cam surface. Provided. When the key cylinder is rotated relative to the sleeve by the regular key, the rotor is moved in the axial direction by the contact of the inclined surface with the key cylinder, so that the rotor is moved in the axial direction. The projection of the lever is connected 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, rotor and key cylinder are returned to the locked position by the third spring, and further returned to the locked position by the second spring pressing 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]

[Action] When a regular key is inserted into the key cylinder, the key
The engagement between the tumbler and sleeve in the cylinder 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 non-rotating sleeve and is slidable relative to the sleeve, the rotor contacts the abutment portion of the key cylinder by the inclined surface so that the rotor can rotate the first spring. 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 elasticity of the second spring. The sleeve is held in a non-rotational state with respect to the case.

Then, as the key cylinder rotates, the low
When the rotor moves sufficiently in the axial direction, the rotor moves away from the sleeve and is engaged with the lever. Further, the engagement between the locking member and the lever is released with the movement of the rotor.

Further, when the key cylinder is rotated, the key cylinder is engaged with the rotor, so that the key cylinder rotates integrally with the rotor and lever against the elasticity of the third spring. Thus, the lever is moved to the unlocking position or the unlocking 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 elasticity of the third spring, and then the pin moves toward the rotor by the elasticity of the second spring. Key cylinder is automatically returned to the initial position.

When the key cylinder is rotated by a different key, the key cylinder is held in a state of being connected to the sleeve by the tumbler, and is rotated together with the sleeve. Therefore, the rotor does not move in the axial direction relatively to the sleeve because the key cylinder does not rotate relative to the sleeve. For this reason, the key cylinder is not connected to the lever via the rotor, and rotation of the lever is prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 disposed in the case 11, and a sleeve 12 in the 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 groove 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 a key cylinder 14 from the case 11
To prevent falling off.

As is apparent from FIG. 1, the key cylinder 1
4 has a contact portion 15 which forms an inclined surface, and the rotor 16 can contact the contact portion 15 and has a sleeve 12.
Is formed to engage with the locking portion 12b. The locking portion 12b of the sleeve 12 is formed as a groove having a smaller width than the groove 12a. As shown in FIGS. 6 to 8, the projection 20 is formed with a pair of inclined surfaces 20 a and 20 b.
In addition, 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 arc-shaped notch 23.
Is provided.

As shown in FIG. 5, the key cylinder 14 has a hole 14a and a projection 14b projecting radially outward, and a pair of pins 24 are slidably disposed in the hole 14a in the radial direction. You. The outer end of each pin 24 abuts on an 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 disposed in the arc-shaped notch 23.

A rotor is provided between the rotor 16 and the lever 18.
A first spring 19 for pressing the table 16 against the key cylinder 14 is arranged. An arc-shaped projection 30 formed in the axial direction is formed on the lever 18. When the rotor 16 is moved in the axial direction, the projection 30 of the lever 18 can be engaged with the notch 23 of the rotor 16. 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
And a third spring 32 is provided between the first and second springs. 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 pressed by a spring 33 is disposed 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 disposed 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 move between a radially inner locking position for engaging the lever 18 and a radially outer non-locking position for disengaging from the lever 18, and is constantly operated by the elastic force of the spring 37. Energized to the locked position. The locking member 36 has an engaging end 36a that contacts the lever 18 and an inclined surface 36b that contacts the rotor 16. When the rotor 16 is moved in the axial direction, the rotor 16 comes into contact with the inclined surface 36b of the locking member 36 to move the locking member 36 from the locked position to the non-locked position. When the locking member 36 is at the locking position, the rotation of the lever 18 is prevented, but when the locking member 36 is at the non-locking position, the lever 18 is rotatable.

In the above configuration, 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 by about 10 ° from this state,
The contact portion 15 of the key cylinder 14 is the protrusion 2 of the rotor 16
0 abuts on the inclined surface 20a or 20b. 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 firstly moved by the contact portion 15 of the key cylinder 14.
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.

Thereafter, when the key cylinder 14 is rotated at an angle of about 30 °, the rotor 16 is sufficiently moved in the axial direction with the rotation of the key cylinder 14. As shown in FIG.
The protruding portion 20 of the rotor 16 is a locking portion 12b of the sleeve 12.
Separate from. At this time, as shown in FIG. 13, the projection 14b of the key cylinder 14 comes into contact with the end of the arc-shaped notch 23 of the rotor 16, whereby the key cylinder 14 and the rotor 16 are engaged. Are combined. As shown in FIGS. 11 and 14, the notch 23 of the rotor 16 is engaged with the projection 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 elasticity 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 rotates against the elasticity of the third spring 32. 16 and the lever 18 are rotated together,
As shown in FIG. 15, the lever 18 is moved to the unlocking position or the locking position.

When the hand is released from the key 40 in this state, the third
Lever 18 and rotor 1 by the elasticity of spring 32
After reverse rotation of the key cylinder 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 provided with the first spring 1.
9 returns to the initial position shown in FIGS. The locking member 36 is also moved from the non-locked position to the locked position by the spring 37.

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. For this reason, the protrusion 20 of the rotor 16 is engaged with the locking portion 12b of the sleeve 12, and the key cylinder 14
Does not rotate relative to sleeve 12, so that
The stator 16 does not move in the axial direction relative to the sleeve 12. Therefore, the ball 34 is pushed outward from the V-shaped groove 12a formed in the sleeve 12 against the elasticity of the spring 33. For this reason, the key cylinder 14 and the rotor 16 freely rotate integrally. In this case, since the relative rotation between the key cylinder 14 and the rotor 16 cannot be obtained, the key cylinder 14 is connected to the lever 18 via the rotor 16.
Do not connect with Further, since the locking member 36 is held at the locking position where it is locked to the lever 18, the rotation of the lever 18 is prevented.

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

The embodiment of the present invention is not limited to the above-described embodiment, and various changes can be made.

For example, in the above-described embodiment, an example in which a disk tumbler is used as the tumbler 13 has been described, but a pin tumbler can be used. The contact portion 15
Can be formed on a rotating member that rotates integrally with the key cylinder 14 without forming the key cylinder 14 on the key cylinder 14.

[0026]

As described above, according to the present invention, a cylinder lock having a large resistance to destruction can be obtained, so that crimes such as unauthorized intrusion or theft can be effectively prevented.

[Brief description of the drawings]

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

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

FIG. 3 is an exploded perspective view.

FIG. 4 is a sectional view taken along the line BB of FIG. 1;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is a plan view of a rotor.

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

FIG. 8 is a sectional view taken along the line BB in FIG. 6;

FIG. 9 is a bottom view of the rotor.

FIG. 10 is a side view of a rotor.

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

FIG. 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 sectional view showing a state in which the key cylinder of FIG. 5 is rotated by an angle of 30 °.

FIG. 14 is a sectional view showing a state where the key cylinder of FIG. 1 is rotated by an angle of 30 °;

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

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continuation of front page (58) Investigated field (Int.Cl. ⁷ , DB name) E05B 29/04 E05B 29/02 E05B 29/00

Claims (2)

(57) [Claims] 1. A sleeve rotatably arranged in a case.
And a key cylinder that can be engaged with the sleeve by the tumbler and that is rotatably arranged in the sleeve. When the key cylinder is rotated by a different key, the key cylinder is moved to the sleeve. A cylinder lock which is rotated together with the lever to prevent the operation of the lever, wherein the rotor is disposed between the lever and the rotor, the rotor being capable of contacting the contact portion of the key cylinder on an inclined surface; A first spring for pressing the rotor against the key cylinder; a first spring slidably disposed in the key cylinder so as to be slidable in the radial direction;
A pin that abuts against the inner cam surface formed on the inner cam surface and a second spring that presses the pin against the inner cam surface, and rotates the key cylinder relative to the sleeve with a regular key. Then, the rotor is moved in the axial direction by the contact of the inclined surface with the key cylinder, the projection of the key cylinder and the projection of the lever are connected to the rotor, and the key cylinder is further rotated. When the key cylinder is rotated together with the rotor and the lever, and the hand is released from the key, the lever, the rotor and the key cylinder are returned toward the locked position by the third spring, and the inner cam surface is further rotated. A cylinder lock which is returned to a locked position by a second spring that presses a pin against the cylinder lock. 2. The cylinder lock according to claim 1, wherein the locking member is provided on the case, and is moved by the rotor to release the engagement with the lever.