JPH0425894Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention has a double lock, in particular, a main lock consisting of a dead bolt and a secondary lock consisting of an electromagnetic stopper that prevents the dead bolt from retreating in the locked position. Concerning double locks.

In this type of double lock, in order to avoid unauthorized unlocking of the secondary lock consisting of an electromagnet-based stopper, the electromagnet of the secondary lock can be controlled by a computer, as will be explained later. For example, it has characteristics that are advantageous for security and crime prevention management of collective housing such as so-called condominiums, and for improving the safety of main locks using dead bolts.

Conventional technology and its problems Conventionally, this type of double lock has a mechanism in which the stopper, which is a secondary lock, is moved back from the dead bolt in the locked position by the suction action of the iron core caused by the excitation of an electromagnet fixed in a fixed position. A device is known in which the dead bolt is moved from a position where it is blocked to a position where it is allowed to retreat. In this conventional double lock, the movement of the iron core itself as the electromagnet is energized brings the stopper, which is a secondary lock, from the locked position to the unlocked position, so it is necessary to use an electromagnet with relatively strong magnetic force. The electromagnet that is compatible with this has a relatively large size, and there is a problem in that the space occupied by the lock as a whole becomes large.

The present invention eliminates the drawbacks of the above-mentioned prior art, applies an electromagnet with weak magnetic force, and combines an electromagnet-based stopper with a main lock consisting of a dead bolt as an effective sublock. It is possible to improve the usability due to the above-mentioned general characteristics of a double lock that uses a stopper as a secondary lock, and the lock system as a whole including the electrical system can be made compact and can be easily stored in the main body of a general door. The purpose is to provide heavy tablets.

Means for Solving the Problems In order to achieve the above object, the double lock of the present invention has a main lock consisting of a dead bolt locked by a locking mechanism such as a cylinder lock, and prevents the dead bolt from retreating in the locked position. It is equipped with an auxiliary lock consisting of a stopper, and is equipped with a sliding plate urged by a spring so as to move forward toward the dead bolt, and is actuated by an actuating body that drives the dead bolt when the dead bolt retreats to move the sliding plate. A sliding arm is interposed between the sliding plate and the actuating body, and the sliding arm is biased forward by a spring having a weaker spring force than the spring biasing the plate in a predetermined direction. An electromagnet having an iron core is fixed such that the iron core faces the dead bolt side, the stopper is attached to the iron core of the electromagnet, and a stop is provided for regulating the limit of advancement of the stopper toward the dead bolt side. It is characterized by

By employing this double lock structure, the present invention achieves the effect of solving the intended technical problem, as will be explained later.

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings. The illustrated embodiment of the present invention is for a door lock, and the dead bolt 1 as the main lock is moved to the locked position by the actuating body 2, which is a hub or link to which the cylinder, thumb turn, etc. of the cylinder lock is connected. It is adapted to be driven to the unlocked position.
said hub is indicated by a solid line with the reference numeral 2';
The links are indicated by dashed lines and labeled 2''.

An electromagnet 4 is placed at a fixed position in a lock case 3 having a dead bolt 1 and an operating body 2 therein, with its iron core 5 facing toward the dead bolt 1 (upwards in the figure). A stopper 6, which is an auxiliary lock, is attached to the tip of the iron core 5 of the electromagnet 4 to prevent the dead bolt 1 from moving back (unlocking) in the locked position.

A sliding plate 8 urged by a spring 7 to advance toward the dead bolt 1 is disposed within the lock case 7, and the electromagnet 6 is fixed to the plate 8. The iron core 5 of the electromagnet 6 is a spring 15 having a weaker spring force than the spring 7 that biases the sliding plate 8 in a predetermined direction.
is urged forward (above the first). It goes without saying that the forward biasing of the iron core 5 by the spring 15 is effective only when the electromagnet 4 is not energized, and is nullified when it is energized.

The operating body 2 moves the sliding arm 9 which is actuated by the actuating body 2 when the dead bolt 1 retreats to push down the sliding plate 8 rearward.
and the sliding plate 8. One end of the arm 9 is pivotally connected to the tip of the operating body 2, and the other end faces the front surface of the sliding plate 8. When the dead bolt 1 is retracted, the actuating body 2 is actuated to push down the sliding plate 8 rearward using the arm 9 as the actuating medium.

A stop 14 is provided to restrict the limit of the advance of the stopper 6 toward the dead bolt 1 side.

Reference numerals 10 and 11 are guide pins for the sliding plate 8. 12 is an elongated hole of the sliding plate 8, and a guide pin 10,
11 are fitted. 13 is a guide pin for the sliding plate 9.

The operation of the double lock of the present invention in the illustrated embodiment is as follows.

The locked state of the dead bolt 1 and stopper 6 is shown in FIG. In the locked state,
The electromagnet 4 is in a demagnetized state, and under the spring bias of the spring 7, the electromagnet 4 and the sliding plate 8 are pushed toward the dead bolt 1, and the spring 15 is in a compressed state.
In this state, even if the actuator 2 attempts to move the dead bolt 1 backward, the dead bolt 1 will be caught by the stopper 6 and prevented from moving backward, and will not be unlocked. More specifically, when the actuating body 2 is rotated counterclockwise in FIG. 1 in order to move the dead bolt 1 backward, the sliding arm 9 moves as the actuating body 2 rotates counterclockwise. 1
The arm 9 moves downward while rotating clockwise in the figure, and presses down the sliding plate 8 with the lower edge of the arm 9. However, as the electromagnet 4 descends with the plate 8, the spring is in the compressed state. 15 only expands, the iron core 5 and the stopper 6 are not pushed down, and the stopper 6 remains engaged with the dead bolt 1.

As is clear from the above, the reason why the spring 7 biases the sliding plate 8 and the electromagnet 6 in a predetermined direction is because the stopper 6 prevents the dead bolt 1 from retreating, and the spring 15 of the iron core 5 is compressed. This is to allow the stopper 6 to fulfill its function as an auxiliary lock. That is, if this spring bias is lacking, the compression of the spring 15 will not be achieved, and it will not be ensured that the secondary lock consisting of the stopper 6 will prevent the dead bolt 1, that is, the main lock, from retreating.

When the electromagnet 4 is excited, the iron core 5 is placed in an attracted state. However, since the electromagnet 4 is pushed up toward the dead bolt 1 together with the sliding plate 8 by the spring bias of the spring 7, the iron core 5 and the stopper 6 do not retreat with respect to the electromagnet 4. That is, with the excitation of the electromagnet 4, the stopper 6, under the attraction of the iron core 5, is substantially connected to the electromagnet 4.
It becomes an integrally connected state.

When the actuating body 2 is rotated counterclockwise while the electromagnet 4 is energized, the sliding arm 9 is rotated clockwise and moved downward, and the lower edge of the arm 9 The sliding plate 8 is pushed down against the spring bias of the spring 7, and as the electromagnet 4 is pushed down by the plate 8, the stopper 6 is retreated and the dead bolt 1 is pulled back under the attraction of the iron core 5 by the excitation of the electromagnet 4. The dead bolt 1 is unlocked backward by the counterclockwise rotation of the actuating body 2, which is released and moves further.
The state will be as shown in Figure 2. After the dead bolt 1 is unlocked, the electromagnet 4 may be demagnetized.

As is clear from the above, the stopper 6, which is the secondary lock, is not unlocked by the suction operation of the iron core 5 caused by the excitation of the electromagnet 4, but is based on the operation of the actuator 2, and when the dead bolt 1 is retracted, the electromagnet 4 is unlocked backward. By being pushed to the position, the lock is unlocked by excitation of the electromagnet 4 and integral connection with the electromagnet 4.

In this invention, in order to avoid unauthorized unlocking of the stopper 6, if necessary, under the application of a computer,
The excitation of the electromagnet 4 can be controlled. The means for carrying out this control are shown as a block diagram in FIG.

A computer 16 that controls the excitation of the electromagnet 4
An interface 161 that processes input and output signals for executing the required control, and a memory 162 that stores data necessary for executing the required control.
and a microprocessor 163 that performs arithmetic processing for necessary control execution. Connected to the computer 16 are a card reader 17 for a card containing coded information for properly unlocking the stopper 6, and a switch 18 for the electromagnet 4. The card reader 17 reads the code on the card, and if it is correct, the switch 18 is turned on by a command from the computer 16.
Electromagnet 4 is excited.

Effects of the invention As described above, according to the invention, when the electromagnet is energized, the electromagnet is pushed backward when the deadbolt is retracted based on the operation of the actuating body for driving the deadbolt. Since the stopper is unlocked, an electromagnet with a weak magnetic force can be used, so a fairly small electromagnet is sufficient. In addition, while conventional systems generally required 12 to 24V as the operating voltage for the electromagnet, in the present invention a voltage of about 1.5V is sufficient. It becomes possible to use it.

Thus, the present invention can embody the combination of an electromagnet-based stopper as a secondary lock with a main lock consisting of a dead bolt by applying an electromagnet with a weak magnetic force.
The above-mentioned general characteristics of the double lock, in which the dead bolt is the main lock and the electromagnetic stopper is the secondary lock, can increase its usefulness, and the lock system as a whole, including the electrical system, can be made more compact. It can be realized as something that can be easily stored in the main body of a general door.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the present invention with the main lock, the dead bolt, and the secondary lock, the stopper, in a locked state, and Fig. 2 is a front view showing the double lock of the present invention in Fig. 1 in an unlocked state. FIG. 3 is a block diagram of a means for controlling the excitation of the electromagnet of the stopper under the application of a computer. 1...dead bolt which is the main lock, 2...operating body, 3...lock case, 4...electromagnet, 5...iron core, 6...stopper which is the secondary lock, 7...spring for pushing up the electromagnet .

Claims (1)

[Scope of utility model registration request] It is equipped with a main lock consisting of a dead bolt that is locked by a locking mechanism such as a cylinder lock, and a secondary lock consisting of a stopper that prevents the dead bolt from retreating in the locked position. An energized sliding plate is provided, and a sliding arm is provided between the sliding plate and the operating body and is actuated by an operating body that drives the dead bolt to push the sliding plate backward when the dead bolt retreats. An electromagnet is interposed on the plate and has an iron core urged forward by a spring having a weaker spring force than the spring that urges the electromagnet in a predetermined direction, and the electromagnet is fixed such that the iron core faces the dead bolt side. , a double lock in which the stopper is attached to the iron core of the electromagnet, and a stop is provided for regulating the limit of advancement of the stopper toward the dead bolt side.