JP2002038775A - Cylinder lock and key - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock simplifying a constitution and facilitating manufacture and, at the same time, having the difficulty of unfairly unlocking the cylinder lock by a third person. SOLUTION: For the cylinder lock 10 including an outside cylinder 1, first and second inside cylinders 2 and 3 circumferentially coming into contact with the outside cylinder 1, at the same time, forming first and second key ways 17 and 19 in them and a connecting spring 4 lying between the first and second inside cylinders 2 and 3, driver holes 13 passing through the circumferential surfaces of the inside cylinders 2 and 3 and the inside circumferential surface of the outside cylinder 1, drivers 6 stored in the driver holes 13 and capable of engaging with the inside cylinders 2 and 3 and outside cylinder 1, engaging pins 5 coming into contact with the drivers 6 and pushing springs 7 energizing the drivers 6 toward the engaging pins 5, a key 21 energizing the pins 5 to the outside cylinder 1 side against energizing force of the pushing springs 7 when the key 21 is inserted in the first and second key ways 17 and 19 and positioning the drivers 6 to the outside cylinder 1 side, the connecting spring 4 energizes the adjoining inside cylinders 2 and 3 to the circumferential direction each other, the first and second key ways 17 and 19 formed in the inside cylinders 2 and 3 are energized to positions to be slipt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock, and more particularly to a cylinder lock used for a door of a general house, an ignition key of a vehicle, a door of a vehicle, and the like.

[0002]

2. Description of the Related Art Various types of cylinder locks have been proposed for cylinder locks of this kind in order to prevent unauthorized unlocking (picking) by a third party without a key. For example, in Japanese Patent Application Laid-Open No. 9-41742, a first inner cylinder and a second inner cylinder that are divided into two are provided, and the first inner cylinder and the second inner cylinder are operated by a one-way clutch provided in the first and second inner cylinders. When only one inner cylinder is rotated, the second inner cylinder is made unrotatable, and a key common to the first and second inner cylinders is inserted to join the first and second inner cylinders together. There is disclosed a technology that can be unlocked only when it is turned.

[0003]

However, when an unauthorized third party tries to open the cylinder lock using a wire, a thin jig, or the like, it is simultaneously engaged with the first inner cylinder and the second inner cylinder. By rotating them together and simultaneously, the unlocking operation is possible, and there is a possibility that the unlocking is easily performed.

In addition, since it is necessary to provide a one-way clutch mechanism in the adjacent inner cylinder, there is a problem that the configuration becomes complicated and the production is troublesome.

Accordingly, an object of the present invention is to provide a cylinder lock which has a simple structure, is easy to manufacture, and is difficult to be unfairly unlocked by a third party.

[0006]

According to a first aspect of the present invention, there is provided an outer cylinder, a plurality of inner cylinders having a keyway formed around the inner periphery of the outer cylinder, and a connection interposed between the inner cylinders. A driver hole that includes a spring and communicates with the outer peripheral surface of each inner cylinder and the inner peripheral surface of the outer cylinder, a driver housed in the driver hole and engageable with the inner cylinder and the outer cylinder, An engaging pin that abuts and a pressing spring that urges the driver toward the engaging pin, and when the key is inserted into the key groove, the key pushes each pin toward the outer cylinder against the urging force of the pressing spring. A cylinder lock that urges the driver to the outer cylinder side, wherein the connection spring urges adjacent inner cylinders in the circumferential direction to each other and urges the key groove formed in each inner cylinder to a position where it is shifted. It is characterized by doing.

According to the first aspect of the invention, the adjacent inner cylinders urged by the connecting spring are located at positions where the key grooves formed in the respective inner cylinders are shifted from each other. Therefore, the owner of the legitimate key first inserts the key into the key groove of the first inner cylinder, and the key end of the key is located at a position off the key groove of the second inner cylinder. Key is inserted only halfway. Next, in this state, the first inner cylinder into which the key has been inserted is rotated against the urging force of the connection spring, so that the position of the key groove matches the position of the key groove of the second inner cylinder. Here, the key is also inserted into the key grooves of the two inner cylinders. As a result, the key is inserted into the plurality of inner cylinders at the same time, and the two inner cylinders are simultaneously turned to unlock. That is, since the second inner cylinder is provided with the latch engagement portion connected to the latch bolt, the second inner cylinder is unlocked by turning the second inner cylinder.

On the other hand, when an unauthorized third party who does not have a key attempts to open a cylinder lock using a picking jig or the like (for example, a wire), the picking jig is attached to the key of the first inner cylinder. Although it can be operated by inserting it into the groove, the picking jig cannot be inserted into these two key grooves because it is located off the key groove of the second inner cylinder. Moreover, 2
Since the second inner cylinder is urged by the connection spring, it is difficult to rotate the first inner cylinder against this urging force. Therefore, unlocking with a picking jig is difficult.

Further, according to the present invention, since the two inner cylinders are merely displaced from each other in the keyway by the connecting spring, the configuration is simple and the production is easy.

According to a second aspect of the present invention, there is provided a key for use in the cylinder lock according to the first aspect, wherein a notch having an open end is formed on an insertion side of the key. The coupling spring is located within the notch of the key when inserted into the key groove of the inner cylinder.

According to the second aspect of the present invention, when used in the cylinder lock according to the first aspect, the key can be inserted into the keyway avoiding the connecting spring, so that a key having a simple structure is used. The cylinder lock described in 1 can be opened and closed.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a cylinder lock according to an embodiment of the present invention, and FIG.
FIG. 3 is a side view showing a part of the cylinder lock shown in FIG. 1 in a cutaway manner, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a side view of a cylinder lock according to another embodiment. 5 is a sectional view of the inner cylinder in each part of FIG. 4, (a) is a sectional view taken along line AA, (b) is a sectional view taken along line BB, and (c) is a sectional view taken along line CC.

The cylinder lock 10 according to the present embodiment is
An outer cylinder 1, a first inner cylinder 2 housed in series in the outer cylinder 1,
A second inner cylinder 3 is provided, and the first inner cylinder 2 and the second inner cylinder 3 are urged by a connecting spring 4 in the circumferential direction.

The first inner cylinder 2 is provided with a fitting portion 11 to be fitted into the second inner cylinder 3 to facilitate the assembling of the first inner cylinder 2 and the second inner cylinder 3. A plurality of driver holes 13 are formed on the peripheral surface of the first inner cylinder 2.
The pin 5, the driver 6 and the pressing spring 7 are provided in this order, and the pressing spring 7 is housed in a driver hole 15, which will be described later, formed on the inner peripheral surface side of the outer cylinder 1.

Similarly to the first inner cylinder 2, the second inner cylinder 3 has a driver hole 13 formed on the outer peripheral surface, and is provided with a pin 5, a driver 6, and a pressing spring 7. Further, since the second inner cylinder 3 is provided with the latch engagement portion 16 connected to a latch bolt (not shown), the cylinder lock 10 is unlocked by turning the second inner cylinder 3. It is.

On the other hand, a driver hole 15 corresponding to the driver hole 13 on each of the inner cylinders 2 and 3 is formed in the outer cylinder 1.
And urges the driver 6 toward the driver hole 13 on the first inner cylinder 2 or the second inner cylinder 3 side. Each of the driver holes 13 of the first inner cylinder 2 or the second inner cylinder 3 and the driver hole 15 of the outer cylinder 1 communicate with each other at a predetermined position. , 3 driver holes 13
And the driver hole 15 of the outer cylinder 1 are slidable.

A first key groove 17 is formed in the first inner cylinder 2, a second key groove 19 is formed in the second inner cylinder 3, and a key 21 is fitted in each key groove 17, 19. In this case, the first inner cylinder 2 and the second inner cylinder 3 can rotate together, and the key 1
By turning these inner cylinders 2 and 3 together with 7, the lock is unlocked.

On the opposite end faces of the first inner cylinder 2 and the second inner cylinder 3, a locking groove 23 for locking the connecting spring 4 is formed. The connection spring 4 is a coil spring, which applies a biasing force in the circumferential direction, and the ends of the connection spring 4 are locked in the locking grooves 23 of the first inner cylinder 2 and the second inner cylinder, respectively. .

The key 21 has a notch 31 formed in an insertion side portion 29 of the cylinder lock 10. When the key 21 is inserted into the key grooves 17 and 19 of the inner cylinders 2 and 3, the notch 31 is formed. The connecting spring 4 is positioned inside the connecting spring 4 so as not to hinder the insertion of the key 21.

Next, the cylinder lock 1 according to the present embodiment
The operation of 0 will be described. When the key of the cylinder lock 10 is closed, the first inner cylinder 2 and the second inner cylinder 3 are urged by the connecting spring 4 to form the inner cylinders 2 and 3 as shown in FIG. Key grooves 17 and 19 are located at positions shifted from each other.

When a legitimate person who owns the key 21 opens the key, the key 21 is first inserted into the key groove 17 of the first inner cylinder 2.
9, the tip of the key 21 contacts the end surface of the second inner cylinder 3, and the key 21 is inserted only halfway. With the key 21 inserted into the first inner cylinder 2 in this manner, the first inner cylinder 2 is slightly rotated against the urging force of the connecting spring 4 while the key 21 is being pushed in, and the key of the first inner cylinder 2 is pressed. Groove 1
7 is aligned with the keyway 19 of the second inner cylinder 3. At a position where the key grooves 17 and 19 of the first inner cylinder 2 and the second inner cylinder 3 coincide with each other, the key 21 is further depressed and the key groove 19 of the second inner cylinder 3 is
Also plug in. As a result, the key 21 is engaged with the first inner cylinder 2 and the second inner cylinder 3. In this engaged state, the two inner cylinders of the first inner cylinder 2 and the second inner cylinder 3 are simultaneously turned, Unlock.

In this case, in a state where the key 21 is inserted into the first inner cylinder 2 and the second inner cylinder 3, as shown in FIGS. First inner cylinder 2
Or, the driver 6 is located on the side of the second inner cylinder 3, and the driver 6 is located on the side of the outer cylinder 1.
Can rotate, so that the first inner cylinder 2 and the second inner cylinder 3 can rotate simultaneously.

On the other hand, when an unauthorized third party who does not have the key 21 attempts to open the cylinder lock 10 using a picking jig, the picking jig is inserted into the key groove 17 of the first inner cylinder 2. It is conceivable that the pin 6 is inserted, the pin 5 is pressed, and the driver 6 is moved toward the outer cylinder 1 and the pin 5 is moved toward the first inner cylinder 2. However, the keyway 19 of the second inner cylinder 3 is
Cannot be inserted into the key groove 19 of the second inner cylinder 3, and the pin 5 in the second inner cylinder 3 cannot be operated.

That is, although the picking jig can be inserted into the key groove 17 of the first inner cylinder 2, the key groove of the second inner cylinder 3 is shifted, so that the picking jig is simultaneously picked into the two key grooves 17 and 19. Jig cannot be inserted. And the first
The inner cylinder 2 and the second inner cylinder 3 are connected to each other by a keyway 1 by a connecting spring.
7 and 19 are urged in the circumferential direction so as to be shifted from each other.
It is difficult to rotate the inner cylinder 2, and it is noticed that the first inner cylinder 2 is rotated to match the key grooves 17 and 19 between the first inner cylinder 2 and the second inner cylinder 3. Almost no. Therefore, unlocking with a picking jig is not possible.

Furthermore, by picking up the key 21 that happens to fall, even if an unauthorized person who has the key 21 but tries to open the cylinder lock 10, the first inner cylinder 2 If the user does not know that the cylinder 2 will be rotated, the cylinder lock 10 cannot be inserted into the key groove 19 of the second inner cylinder 3 and the cylinder lock 10 cannot be unlocked.

As described above, according to the present embodiment, only a legitimate person having the key 21 can open the lock, an unauthorized person using the picking jig, or an unauthorized person who happens to obtain the key 21. Cannot unlock the cylinder lock 10.

Next, another embodiment of the present invention will be described with reference to FIGS. 4 and 5. In the embodiment described below, the same operation and effect as those of the above-described embodiment are exerted. The same reference numerals are given to the portions, and the detailed description of the portions is omitted, and the portions different from the above-described embodiment are mainly described.

The embodiment shown in FIGS. 4 and 5 shows an example in which three inner cylinders are provided.
A third inner cylinder 25 is provided in addition to the inner cylinder 3 and arranged in series. A key groove 27 is also formed in the third inner cylinder 25, and although not shown, a connection spring 4 is provided between the first inner cylinder 2 and the second inner cylinder 3, and the second inner cylinder 3 The connection spring 4 is also provided between the third inner cylinder 25 and
The key grooves 17, 19, and 27 of each inner cylinder are biased by the connecting spring 4 to positions shifted from each other. According to this embodiment, unlocking by an unauthorized third party or a third party who happens to pick up the key becomes impossible.

The present invention is not limited to the above embodiment,
Various modifications can be made without departing from the spirit of the present invention.

For example, the plurality of inner cylinders are a first inner cylinder 2 and a second inner cylinder.
The number is not limited to the inner cylinder 3 or the third inner cylinder 27, and may be any number as long as it is plural.

The connecting spring 4 is not limited to a coil spring.
What is necessary is just to urge each inner cylinder in the circumferential direction.

[0032]

According to the first and second aspects of the present invention,
By providing a plurality of inner cylinders and urging adjacent inner cylinders with a connection spring,
Since the key grooves formed in each inner cylinder are arranged at positions shifted from each other, an unauthorized third party who does not have a key will open the cylinder lock using a picking jig or the like (for example, a wire). In this case, it is difficult to open the cylinder lock, and it is also possible for a third party who accidentally picks up the key to open the cylinder lock.

Further, since the two inner cylinders are merely displaced from each other by the connecting spring, the positions of the key grooves are simple, so that the structure is simple and the production is easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a cylinder lock according to an embodiment of the present invention.

FIG. 2 is a side view showing a part of the cylinder lock shown in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a side view showing a configuration of a cylinder lock according to another embodiment.

5A and 5B are cross-sectional views of respective parts in FIG. 4; FIG. 5A is a cross-sectional view along AA in FIG. 4; FIG.
(C) is a CC cross-sectional view of FIG. 4.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 1st inner cylinder 3 2nd inner cylinder 4 Connection spring 5 Engagement pin 6 Driver 7 Press spring 10 Cylinder lock 17 1st keyway 19 2nd keyway 21 Key

Claims (2)

[Claims] An outer cylinder, a plurality of inner cylinders having a key groove formed in contact with an inner side of the outer cylinder, and a connecting spring interposed between the inner cylinders; A driver hole communicating with each of the inner peripheral surfaces of the cylinder, a driver housed in the driver hole and capable of engaging the inner cylinder and the outer cylinder, an engagement pin abutting on the driver, and the driver facing the engagement pin. And a pressing spring for biasing each pin against the outer cylinder side against the urging force of the pressing spring when the key is inserted into the key groove, thereby positioning the driver on the outer cylinder side. A cylinder lock, wherein a connection spring urges adjacent inner cylinders in a circumferential direction to each other, and urges a key groove formed in each inner cylinder to a position where it is shifted. 2. A key used in the cylinder lock according to claim 1, wherein a notch having an open end is formed on an insertion side of the key, and the key is inserted into a key groove of an inner cylinder. A key characterized in that the connecting spring is located within the notch of the key when the key is pressed.