JPH068218Y2 - Cylinder lock - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a cylinder lock that is locked and unlocked by an electric signal and uses less power when locking and unlocking.

(B) Conventional technology The applicant of the present invention has applied for a low power consumption cylinder lock in Japanese Patent Application No. 61-2.
Proposed as No. 82455. When a regular electronic key is inserted into the key hole of this cylinder lock, the pin connecting the inner and outer cylinders of the cylinder is electrically removed and the inner cylinder becomes rotatable. You can do it.

(C) Problems to be solved by the invention This cylinder lock is provided with a push-up rod that works together with the pin so that the pin can be restored by human power when the electronic key is pulled out. In one form of cylinder lock, the push rod is exposed in the keyhole. Therefore, the push-up rod can be pulled down by another method without using a regular key from the key hole, and the pin can be removed to make the inner cylinder rotatable. There is a problem that so-called picking is possible.

(D) Means for solving the problem To make picking impossible, the push-up bar directly
It must be exposed in the keyhole. For this purpose, a vertically movable wall for protection is provided between the push-up rod and the keyhole.

(E) Action It is necessary to push up the push-up bar to restore the pin position when pulling out the electronic key, in order to reduce the power consumption of the cylinder lock. Taking advantage of this feature,
The effect of the push-up bar is secured by pushing the push-up bar together with the wall through a wall that can be moved up and down to make picking impossible, and at the same time it is necessary to externally work to pull down the push-up bar. Make it impossible due to the existence of.

(F) Embodiments The present invention will be described below with reference to the drawings.

FIG. 1 is a simplified sectional view for explaining the structure of the embodiment of the present invention. In FIG. 1, 1 is an electronic key, 2 is an inner cylinder, 3 is a keyhole, 4 is an outer cylinder, 5 is a magnetic holding electromagnet, 6 is a movable iron piece of a magnetic holding electromagnet, 7 is an inner cylinder 2 and an outer cylinder 4. A push-up rod for returning the movable iron piece 6 to the magnetic holding state, and a wall 9 for protecting the push-up rod 8 from intruders from the outside. A member is a cylindrical protective cylinder, 10 is a spring for supporting the cylinder 9, and 11 is a spring for lifting the movable iron piece 6 upward.

FIG. 2 is a simplified cross-sectional view for explaining the relative position of the push-up rod 8 and the protective cylinder 9 in a normal state. (A) is a diagram when the push-up rod 8 is at the upper position, (b) is It is a figure when the push-up bar 8 is in a lower position.

Fig. 3 is a diagram when trying to perform picking.
Is a wire, and 13 is an adhesive attached to the tip of the wire.

It will be described with reference to the drawings.

FIG. 1 shows the case where the pin 7 of the cylinder lock hangs down in the pin hole and the electronic key 1 is inserted when the inner cylinder is in a state of being unable to rotate. If the electronic key 1 inserted at this time is authentic, the key code transmitted from the electronic key 1 is decrypted by an electronic circuit (not shown) provided in the outer cylinder 4, and a current is applied to the electromagnet 5. Send and release the holding state. Then, the movable iron piece 6 is pulled down by the force of the spring 11, and accordingly, the pin 7 on the opposite side of the spring 11 moves upward in the pin hole, and the inner cylinder 2 becomes free to rotate. At the same time, the push-up rod 8 and the protective cylinder 9 are brought downward by the force of the spring 11. When the electronic key 1 is manually rotated in this state, the inner cylinder 2 is also rotated, and a dead bolt (not shown) interlocking with this rotates in and out for locking and unlocking.

Next, when the electronic key 1 is pulled out by hand, the push-up rod 8 and the protective cylinder 9 located below due to the force are lifted up by the electronic key 1, so that the movable iron piece 6 is pushed down and the permanent magnet of the electromagnet 5 It is held downward by force, and the pin 7 is also lowered downward accordingly, and the inner cylinder is held in a non-rotatable state.

FIG. 2 shows the upper and lower two positions of the push-up rod 8 and the upper and lower two positions of the protective cylinder 9 in the normal state described above.
Due to the force of the spring 10, the protective cylinder 9 always receives an upward force and acts together with the lifting bar 8. Of course, the downward force of spring 11 is designed to be greater than the upward force of spring 10.

In the cylinder lock configured as described above, even if the picking is performed, the picking cannot be performed because of the protective cylinder 9 as shown in FIG. In a normal state, the protective cylinder 9 and the push-up rod 8 are in contact with each other with a slight upward force of the spring 10, but they are not integrated with each other. Since the protection cylinder 9 is movable in the direction of the keyhole 3 independently of the push-up rod 8, only the protection cylinder 9 is pulled down when picking, and the push-up rod 8 remains at the upper position as it is. . Therefore, the pin 7 does not move and the purpose of picking cannot be achieved. The protective member 9 serves its purpose if it is constructed so as to form a protective wall so that the push-up rod 8 cannot be directly touched by the keyhole 3. Usually, it is formed in a tubular shape so as to enclose the push-up rod 8.

(G) Effect of the device With the very simple structure of attaching the protection member 9 of the present invention, the power-saving electronic cylinder lock can be turned into a non-pickable lock and the crime prevention performance can be dramatically improved. , Its effect is great.

[Brief description of drawings]

FIG. 1 is a simplified sectional view showing an embodiment of the present invention, FIG. 2 is a view showing a normal relational position between a push-up rod and a protective cylinder in the embodiment of FIG. 1, and FIG. 3 is an attempt to perform picking. It is a figure of time. 1 ... electronic key, 2 ... inner cylinder, 3 ... keyhole, 4 ... outer cylinder,
5 ... Holding electromagnet, 6 ... Movable iron piece, 7 ... Pin, 8
...... Push bar, 9 ...... Protective tube, 11 ...... Spring.

Claims (1)

[Scope of utility model registration request] 1. An electronic cylinder comprising an inner cylinder and an outer cylinder rotatable by the electronic key, the inner cylinder having a key hole into which the electronic key is inserted, a pin hole into which a pin of the outer cylinder is inserted, and a groove into which a push-up rod of the outer cylinder is inserted. The outer cylinder has a pin that enters the pin hole of the inner cylinder and connects the outer cylinder and the inner cylinder to make the inner cylinder in a non-rotatable state, and the pin in a direction opposite to the pin hole of the inner cylinder. Energizing to release the holding only when the urging spring and the pin are held in the pin hole of the inner cylinder without electricity and the sign of the electronic key and the sign of the cylinder lock match. A push-up rod that is connected to the holding electromagnet and the pin, and when the electronic key is pulled out from the groove of the inner cylinder, the pin is inserted into the pin hole of the inner cylinder by the pulling force of the key. The push-up rod is formed so as not to be exposed in the keyhole, and is pushed in the direction of the keyhole. Lock cylinder and having a movable protective member independently of the lower bar.