JP2980251B2 - Cylinder lock - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device, in particular a cylinder lock having a high resistance to breaking.

2. Description of the Related Art A conventional cylinder lock can rotate a regular key to a lock position or an unlock position on a key cylinder provided with a tumbler that 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 that engages with the groove in the case, there is a risk that the tumbler may be unlocked due to breakage. Therefore, as disclosed in, for example, JP-A-1-315569, there has been proposed a free-turn cylinder lock in which the key cylinder freely rotates when the key cylinder is unlocked by applying a rotational force.
The cylinder lock includes a sleeve rotatably disposed in a 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 released from the groove formed in the sleeve, and the key cylinder can be rotated relative to the sleeve. Thereby, the sliding ring can be engaged with the lock piece operating member to operate the lock device. When a different type of key is inserted into the key cylinder, the key cylinder is held in engagement with the sleeve by the tumbler, so that the key cylinder rotates together with the sleeve. As a result, the lock piece operating member cannot be rotated, so that the lock device cannot be operated.

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

Problems to be Solved by the Invention Incidentally, the lock device disclosed in JP-A-1-315569 has a disadvantage that the key cylinder cannot be operated smoothly after different types of keys are used. That is, a torsion spring is provided between the front plate and the key cylinder in order to automatically return the rotated key cylinder to the initial position in the lock device. A different key is inserted into the key cylinder,
When the sleeve and the key cylinder are freely rotated together, the torsion spring generates a reaction force. However, rotation beyond a certain angle limits 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, when the key cylinder is rotated using a regular key, the key cylinder does not automatically return to the initial position, so that remote locking or unlocking operation is difficult. There are disadvantages.
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.

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

Means for Solving the Problems A cylinder lock according to the present invention includes a sleeve rotatably arranged in a case, and a key cylinder engageable with the sleeve by a tumbler and rotatably arranged in the sleeve. . 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 has a first cam formed on a key cylinder, a rotor having a projection engaged with a locking portion of a sleeve and capable of contacting the first cam of the key cylinder, and a rotor adjacent to the rotor. A first spring disposed between the stopper and the lever and pressing the stopper against the rotor; and a first spring disposed between the stopper and the lever and pressing the stopper against the rotor. A pin is slidably disposed and abuts against a second cam formed on the rotor, and a second spring presses the pin against the second cam.

When the key cylinder is rotated within a certain angle range relative to the sleeve by a regular key, the rotor and the stopper are moved in the axial direction by the cam of the key cylinder,
The engagement of the stopper with the case is released while the engagement of the rotor with the sleeve is released, and the rotor is connected to the lever. Further, by rotating the key cylinder, the key cylinder is rotated integrally with the rotor, the stopper and the lever, and the lever is operated. Further, a third spring is provided between the case and the lever.

When the regular key is inserted into the key cylinder, the engagement between the tumbler and the sleeve in the key cylinder is released, and the key cylinder can be rotated relative to the sleeve. When the key cylinder is manually rotated from this state, the cam of the key cylinder rotates. At this time, since the rotor is engaged with the sleeve that does not rotate, the rotor is moved inward in the axial direction by the cam of the key cylinder. At the same time, the stopper is also moved axially inward integrally with the rotor against the elasticity of the first spring. At this time, the pin provided in the key cylinder slides on the surface of the second cam formed on the rotor against the elasticity of the second spring. Further, the sleeve is held in a non-rotation state with respect to the case.

Thereafter, when the rotor moves sufficiently in the axial direction with the rotation of the key cylinder, the rotor separates from the sleeve and is engaged with the lever. The protrusion of the stopper is separated from the groove of the case, and the rotor is engaged with the lever via the stopper.

Further, when the key cylinder is rotated, the key cylinder engages with the rotor and the stopper.
The lever rotates to the locked position or the unlocked position by rotating integrally with the rotor, the stopper and the lever against the elasticity of the spring.

When the key is released from the key in this state, the lever, the stopper and the rotor are reversely rotated toward the initial position by the elasticity of the third spring, and then the pin is pressed toward the rotor and the stopper by the elasticity of the second spring. So that
The key cylinder is automatically returned to the initial position.

When the key cylinder is rotated with 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. For this reason, since the key cylinder does not rotate relative to the sleeve, the rotor does not move in the axial direction 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.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 25.

As shown in FIGS. 1, 2, and 6, a cylinder lock 10 according to the present invention is provided with a case 11, a sleeve 12 rotatably disposed in the case 11, and a rotatable rotation in the sleeve 12. Key cylinder 14. As shown in FIG. 6, the key cylinder 14 is provided with a plurality of tumblers 13 projecting into the groove 12a of the sleeve 12.
Is held in engagement with the sleeve 12 by the tumbler 13. A rotor 16, a stopper 17 and a lever 18 are sequentially provided coaxially with the key cylinder 14.

As can be seen from FIG.
A cam 20 is formed on the rotor 16, and a protrusion 20 is formed on the rotor 16 so as to be able to contact the first cam 15 and to engage with the locking portion 12 b of the sleeve 12. As shown in FIGS. 7 to 10, the projection 20 has a pair of inclined surfaces 20a and 20b. Further, a hole 21 is provided on the side opposite to the protrusion 20. The hole 21 is provided with a second cam 22 formed by a V-shaped inclined surface and an arc-shaped notch 23.

As shown in FIG. 4, the key cylinder 14 is formed with a hole 14a and a projection 14b projecting radially outward, and a pin 24 is disposed in the hole 14a so as to be slidable in the radial direction. The outer end of the pin 24 contacts a second cam 22 formed on the rotor 16.
The second spring 25 presses the pin 24 outward against the second cam 22. The protrusion 14b of the key cylinder 14 is
Are arranged in the arc-shaped notch 23.

The stopper 17 disposed adjacent to the rotor 16 is
An opening 26 having substantially the same shape as the hole 21 of the case 11 and the case 11
And a protruding portion 17a fitted to the lever 18. The opening 26 is formed by a V-shaped inclined surface 27 that engages with the pin 24 and an arc-shaped notch 28. The protrusion 17a is slidably disposed in the groove 11a. A first spring 19 that presses the stopper 17 against the rotor 16 is disposed between the stopper 17 and the lever 18. The lever 18 has an arc-shaped projection 30 formed in the axial direction. Projection of lever 18
30 is always engaged with the arc-shaped notch 28 of the stopper 17, and when the stopper 17 is moved in the axial direction, the projection 30 of the lever 18 can engage with the notch 23 of the rotor 16. is there. Further, a hole 31 is provided for connecting a rod connected to a lock device (not shown). Third between the case 11 and the lever
Spring 32 is provided. As shown in FIGS. 2 and 6, the sleeve 12 has a V-shaped groove 12c. A ball 34 pressed by a spring 33 is provided in the groove 12c.
Is arranged.

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. Regular key 40
Is inserted into the key cylinder 14, the engagement between the tumbler 13 in the key cylinder 14 and the sleeve 12 is released, and the key cylinder 14 can be rotated relative to the sleeve 12. When the key cylinder 14 is manually rotated by about 10 ° from this state, the state shown in FIGS. 1 to 4 is changed to the state shown in FIGS. 12 to 15, respectively, and the first cam 15 of the key cylinder 14 is moved.
Abuts against the inclined surface 20a or 20b of the protrusion 20 of the rotor 16.
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 that does not rotate.
The first cam 15 of the key cylinder 14 moves the rotor 16 inward in the axial direction. At the same time, the stopper 17 is also moved inward in the axial direction integrally with the rotor 16 against the elasticity of the first spring 19. At this time, the pin 24 provided in the key cylinder 14 is rotated by the rotor 16 against the elasticity of the second spring 25.
Slides on the surface of the second cam 22 formed in the second cam.

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. 16 and FIG.
The 16 projections 20 are separated from the locking portions 12b of the sleeve 12.
The arc-shaped projection 30 of the lever 18 engaged with the arc-shaped notch 28 of the stopper 17 is engaged with the rotor 16.
At this time, the pin 24 of the key cylinder 14 is in contact with the inclined surface 27 of the stopper 17, and the projection 17a of the stopper 17 is
It is detached from the first groove 11a. That is, as shown in FIG. 18, the key cylinder 14 and the rotor 16 are engaged by the projection 14b of the key cylinder 14 abutting on the end of the arc-shaped notch 23 of the rotor 16. Also, the key cylinder 14 pin
The key cylinder 14 and the stopper 17 are engaged by the contact of the 24 with the inclined surface 27 of the stopper 17.

When the key cylinder 14 is further rotated while the key cylinder 14 is engaged with the rotor 16 and the stopper 17, the key cylinder 14 is integrated with the rotor 16, the stopper 17 and the lever 18 against the elasticity of the third spring 32. Rotate, Fig. 20 ~ 23
As shown, the lever 18 is moved to an unlocked position or an unlocked position.

When you release your hand from the key 40 in this state, the third spring
After the lever 18, the stopper 17, and the rotor 16 are reversely rotated toward the initial position by the elasticity of the second spring 25, the second spring 25
The pin 24 is pressed toward the rotor 16 and the stopper 17 by the elasticity of the key cylinder 14, and the key cylinder 14 is automatically returned to the initial position. Further, the rotor 16 and the stopper 17 are also returned to the initial positions shown in FIGS. 1 and 2 by the first spring 19.

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 key cylinder 14 does not rotate relative to the sleeve 12, and the rotor 16 does not move in the axial direction relative to the sleeve 12. Therefore, as shown in FIGS. 23 to 25, the ball 34 is
Is extruded outward from the groove 12a having a V-shaped cross-section. For this reason, the key cylinder 14 and the rotor 16 freely rotate integrally. In this case, since relative rotation between the key cylinder 14 and the rotor 16 cannot be obtained, the key cylinder 14 is not connected to the lever 18 via the rotor 16. Stopper 17
The projection 17a is held in a state of being locked in the groove 11a of the case 11, so that the rotation of the lever 18 is prevented.

Thus, in the cylinder lock 10 according to the present invention, 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.

Embodiments of the present invention are not limited to the above embodiments, and various modifications 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 may be used. Also, set the cam 15 to the key cylinder 14
Instead of being formed on the key cylinder 14, it may be formed on a rotating member that rotates integrally with the key cylinder 14.

Effect of the Invention As described above, according to the present invention, a cylinder lock having a large resistance to destruction can be obtained, so that it is possible to effectively prevent crimes such as unauthorized entry or theft.

[Brief description of the drawings]

1 is a cross-sectional view of a cylinder lock according to the present invention, FIG. 2 is a cross-sectional view at a position 90 ° away from the cross-section of FIG. 1, and FIG. 3 is along the line AA of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. 2, and FIG. 5 is a cross-sectional view of FIG.
6 is an exploded perspective view, FIG. 7 is a plan view of the rotor, FIG. 8 is a cross-sectional view taken along line AA of FIG. 7,
9 is a sectional view taken along the line BB of FIG. 7, FIG. 10 is a bottom view of the rotor, FIG. 11 is a side view of the rotor, and FIGS. FIG. 12 is a cross-sectional view showing a rotated state in the cross section of FIG. 1, FIG. 13 is a cross-sectional view showing a rotated state in FIG. 2, and FIG. 14 is a cross-sectional view showing the rotated state in FIG. 3, FIG. 15 is a cross-sectional view showing the rotated state in FIG. 4, and FIGS. FIG. 16 is a cross-sectional view showing a rotated state in the cross section of FIG. 1, FIG. 17 is a cross-sectional view showing a rotated state in FIG. 2, and FIG. FIG. 3 is a cross-sectional view showing a rotated state, FIG. 4 is a cross-sectional view showing a rotated state in FIG. 2, and FIGS. Cylinder indicates a state where it is rotated approximately 90 ° angle by regular key, FIG. 20 is a sectional view showing a state of being rotated in the cross section of FIG. 1, 21
The figure is a sectional view showing the state rotated in FIG.
The figure is a sectional view showing the state of rotation in FIG.
FIG. 24 is a cross-sectional view showing a rotated state in FIG.
FIG. 26 to FIG. 26 show a state in which the key cylinder is rotated by different kinds of keys, FIG. 24 is a sectional view showing the state rotated in FIG. 2, and FIG. 25 shows a state rotated in FIG. FIG. 26 is a cross-sectional view showing a state rotated in FIG. 10 ... Cylinder lock, 11 ... Case, 11a ... Groove, 12 ...
... Sleeve, 13 ... Tumbler, 14 ... Key cylinder, 15
... 1st cam, 16 ... rotor, 17 ... stopper, 17a
... Projection, 18 ... Lever, 19 ... First spring,
20: Projecting portion, 22: Second cam, 24: Pin, 25:
The second spring, 40 ... key, 32 ... third spring,

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E05B 29 / 02,29 / 04 E05B 27 / 02,27 / 04

Claims (2)

(57) [Claims] 1. A key cylinder having a sleeve rotatably arranged in a case and a key cylinder engagable with the sleeve by a tumbler and rotatably arranged in the sleeve, wherein the key cylinder is rotated by a different key. A key lock, wherein the key cylinder rotates together with the sleeve to prevent the operation of the lever, the key lock having a first cam formed on the key cylinder, a projection engaged with the locking portion of the sleeve, and A rotor which can be brought into contact with the first cam; a stopper which is arranged adjacent to the rotor and has a projection which fits into a groove of the case; A first spring for pressing, a pin slidably disposed in the key cylinder in a radial direction and abutting on a second cam formed on the rotor; A second spring for pressing the pin is provided. When the key cylinder is rotated within a certain angle range relative to the sleeve by a regular key, the rotor and the stopper are moved in the axial direction by the cam of the key cylinder. , The rotor is disengaged from the sleeve, the stopper is disengaged from the case, the rotor is connected to the lever, and the key cylinder is rotated to rotate the key cylinder integrally with the rotor, stopper and lever. A cylinder lock characterized by operating a lever. 2. The cylinder lock according to claim 1, wherein a third spring is provided between the case and the lever.