JPH08189233A - Electric lock - Google Patents

Abstract

PURPOSE: To provide an electric lock simple in structure by utilizing the whole of an existing cylinder lock. CONSTITUTION: A post-fitting key box is installed in such a manner as to cover a keyway of a cylinder lock 2 which is opened in the door outer surface, and a locking and releasing rod 20, one end of which forms a stem part 21 of a master key of the cylinder lock and is inserted in the keyway of the cylinder lock, and the other end of which is projected over the key box and connected to a rotatably supported external operating member 22 is provided in the key box. A locking cam 26 is linked with the locking and releasing rod 20 and rotated, interlocking with the rotation of the rod, and the rotation of the locking cam 26 is controlled by a plunger 31 of a solenoid 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric lock, and more particularly to an electric lock which is attached to an existing cylinder lock and can utilize the entire mechanism of the cylinder lock to simplify the structure. .

[0002]

2. Description of the Related Art Generally, a cylinder lock is most commonly used as a door locking device because of its low cost and easy handling.

However, since the spare key of a cylinder lock can be easily duplicated at a locksmith in a town, there is an envy that the safety is low unless care is taken in handling the duplicate key.

Further, since it is known that the keyhole of the inner cylinder of the cylinder lock is exposed to the outside, when a wire-like picking tool is inserted into the keyhole, it may be unlocked by chance. .

Therefore, in recent years, the so-called electric lock, which electrically locks and unlocks by using a secret code instead of a key, is highly safe, and therefore its use is increasing.

[0006]

However, in order to mount the electric lock on the door on which the cylinder lock is mounted, the conventional door is replaced with a door equipped with the electric lock, or, It is necessary to pull out the lock box of the cylinder lock from the door and install an electric lock instead.

It goes without saying that replacement of a set of doors requires enormous replacement costs, and if many years have passed since construction, doors suitable for the exterior of the entrance are not always on the market. Not exclusively.

Further, when replacing the cylinder lock with an electric lock, it is cheaper than replacing a set of doors, but since the size of the lock box of the cylinder lock is generally different from that of the electric lock, the electric lock is mounted. In order to do so, it takes a long time to post-process the door,
There is an inconvenience.

Therefore, an object of the present invention is to provide an electric lock which can be easily retrofitted and has a simple structure by utilizing a cylinder lock mechanism.

[0010]

In order to achieve the above-mentioned object, the present invention is designed to cover a key hole of an existing cylinder lock opened on the outer surface of the door and to be called from the inside of the door. An externally attached lock box mounted on the outer surface, and inside this lock box, one end that constitutes the stem of the lock key of the cylinder lock is inserted into the key hole of the cylinder lock, and the other end is projected outside the lock box. , A locking / unlocking rod connected to an rotatably supported external operating member, and the locking / unlocking rod, which are linked to the locking / unlocking rod and the external operating member. The movable cam is movably guided between the locking cam, the locking position that interferes with the movement path of the locking cam in the unlocking direction, and the unlocking position separated from the moving path, and is biased in the locking position direction. And a solenoid with a plunger,
At a predetermined angular position around the locking cam, a locking edge that engages with the plunger in the locking position, and a plunger during rotation for locking to engage with a wedge action to unlock it. It is characterized in that a curved surface portion that pushes to is continuously provided.

[0011]

In the electric lock according to the present invention constructed as described above, an existing cylinder lock and a lock mechanism such as a dead bolt controlled by the cylinder lock are left unremoved,
These are operated via an locking / unlocking rod by an external operation member such as a dial provided outside the lock box.

Therefore, one end of the locking / unlocking rod, that is, the stem portion of the key combination of the cylinder lock is inserted into the key hole of the cylinder lock.

When the external operating member connected to the other end of the locking / unlocking rod is turned in the locking direction, the cylinder lock is locked by its original function as a cylinder lock. In this case, the solenoid serving as the electromagnetic actuator in the electric lock may or may not be energized.

When the solenoid is not energized,
The plunger occupies the locking position where it interferes with the locking cam due to its urging force, but when the locking cam rotates in the locking direction, the plunger is unlocked by the wedge action caused by the engagement between the curved surface and the plunger. Since it is pushed in the position direction, the locking cam is not prevented from rotating in the locking direction.

When the external operating member is rotated in the unlocking direction during locking, the locking edge of the locking cam interferes with the plunger of the solenoid, so that the external operating member and the locking and unlocking rod integrated with it should be rotated. Is impossible and cannot be unlocked.

To unlock the locked electric lock according to the present invention, for example, a ten-key input panel provided on the outer surface of the lock box is operated to input a personal identification number, and the personal identification number is stored in the control circuit of the electric lock. If it coincides with the personal identification number registered in advance in the unit, an unlocking signal is generated, and the solenoid is energized by this unlocking signal.

Then, the plunger of the solenoid moves in the unlocking position direction and the plunger retreats from the movement locus of the locking end edge of the locking cam, so that the locking cam, that is, the external operation member rotates in the unlocking direction. The cylinder lock is driven in the unlocking direction by the locking / unlocking rod, and the dead bolt is pulled into the lock box of the cylinder lock by the operation of the internal locking mechanism, and the electric lock of the present invention including the cylinder lock is The lock is unlocked.

In order to lock and unlock from the indoor side, the existing thumb turn on the indoor side is operated as in the case of a normal cylinder lock.

Then, even if the inner cylinder of the cylinder lock, the locking / unlocking rod, the locking cam, and the external operating member, which are integrally connected to each other, are locked by the solenoid plunger, the clutch built in the existing lock box. By the action of, the dead bolt can be taken in and out.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show the locked state of the electric lock of the present invention. In this locked state, the cylinder lock 2 mounted on the door 1 is in the locked state, and the tip of the dead bolt 3 controlled by this cylinder lock 2 is shown. The part is inserted into the strike hole opened in the door frame 4, and the door is locked.

A thumb turn 6 is usually provided on the inner surface of the door so as to be coaxial with the cylinder lock.
Is unlocked by, for example, rotating 90 degrees in the clockwise direction, and to lock from the unlocked state, rotate 90 degrees in the counterclockwise direction.

The above-mentioned cylinder lock 2 (including an existing lock box and a dead bolt operating mechanism (not shown)) is already installed on the door, and is drawn by a chain line in the figure. In order to construct the electric lock by using it as a part of the electric lock of the invention, various components shown by solid lines in the drawing are added.

That is, the base plate 10, which serves as the bottom surface of the lock box to be attached later, is fixed to the outer surface of the door so as to be called from the indoor side by, for example, four mounting bolts 11, 11 penetrating the door 1.

The positions of the mounting bolts are set so as not to interfere with the existing lock box of the cylinder lock.

On the outer surface side of the base plate 11, a box-shaped gear box 12 having one surface opened so as to cover the keyhole of the cylinder lock 2 is formed by welding or other method with its opening surface facing the base plate 11. Installed.

A bearing 13 is mounted in the gear box 12 coaxially with the cylinder lock 2, and a locking and unlocking rod 20 is rotatably supported on the bearing 13.

At the inner end (right end in FIG. 1) of the locking / unlocking rod 20, there is formed a stem portion of the key of the cylinder lock 2, that is, a portion 21 which forms a key groove and is inserted into a key hole of the cylinder lock. The stem portion 21 is fully inserted in the key hole of the cylinder lock.

Therefore, the cylinder lock 2 is in an unlocked state, and there is no tumbler on the shear line between the outer cylinder and the inner cylinder for preventing relative rotation of the inner cylinder and the outer cylinder.

Further, the other end of the locking / unlocking rod 20 penetrates a box-shaped cover 16 which constitutes a large part of a lock box to be attached later, and an external operation member 22 such as a dial screwed to the locking / unlocking rod 20.
Are integrally connected, and are fixed by set screws 23.

Further, the stem portion 21 and the locking / unlocking rod 2 are also provided.
The first gear 24 is inserted between the first and second gears.

Above the locking / unlocking rod 20 in the gear box 12, a second gear 25 and a locking cam 26, which are connected to each other in parallel with each other, are connected to each other by a support shaft parallel to the locking / unlocking rod 20. It is rotatably supported by 27.

The second gear 25 is the first gear 24.
And the gear ratio is 1. Therefore, the external operation member 2
When 2 is rotated with fingers, the locking cam 26 linked to the locking / unlocking rod 20 via the first and second gears rotates in the opposite direction to the external operation member 22 and at the same rotation angle.

The locking cam 26 is a substantially circular plate-like body, and at a predetermined angular position thereof, a curved surface portion 26a having a gradually increasing radius over a range of a central angle of about 90 degrees, and an end of the curved surface portion 26a. The locking edge 26b formed by rapidly reducing the radius is continuously provided.

On the other hand, a sub base 14 is fixed on the base plate 10 above the gear box 12, and a solenoid 30 in which a plunger 31 is substantially vertical is fixed on the sub base 14.

The plunger 31 is guided by the sleeve 15 provided on the sub base 14 and the coil portion of the solenoid 30 so as to be movable in the vertical direction. In the illustrated embodiment, the axis of the plunger 31 is a locking cam. The fixed position of the solenoid 30 is set so as to intersect the rotation axis of 26.

A locking body 32 having a flange 33 is integrally formed at the tip (lower end in FIG. 1) of the plunger 31, and the plunger between the flange 33 and the lower end surface of the sleeve 15 is further formed. A plunger spring 34 as a compression coil spring is wound around the.

The plunger 31 is urged downward by the elastic force of the plunger spring 34, that is, in the direction close to the locking cam 26. However, in a normal state, the stopper 35 provided on the base plate 10 is shown in FIG. It is locked in the locked position.

An electric lock control device 40 is arranged in the lock box attached above the solenoid 30. It goes without saying that the control device 40 is not different from that of the conventional electric lock.

The lead wire 41 for supplying electric power to the control device 40 is the same as in the conventional electric lock.
It is led out to the vicinity of the hinge of the door through the inside of the door 1 and is connected to a power source through so-called energizing metal fittings. Needless to say, the lead wire 41 is unnecessary in the battery-operated electric lock.

On the other hand, reference numeral 42 in FIG. 1 denotes an internal control member of the electric lock. In the illustrated embodiment, the control device 40 is switched from the locking / unlocking control mode to the management mode by pushing the internal control member 42. Although the secret code is set or changed using the ten-key input panel 43 attached to the lock box attached later, since this management mode is not the gist of the present invention, further detailed description will be omitted.

The operation of the electric lock according to the embodiment of the present invention configured as described above will be briefly described.

1 and 2 assume that the electric lock is locked, and in order to unlock the electric lock from the outside, the inner cylinder of the cylinder lock 2 is rotated 180 degrees counterclockwise in FIG. It should be done.

Therefore, when the external operating member 22 is rotated counterclockwise, the locking cam 26 rotates clockwise. And
The locking edge 26b rotates in the directions of 10:00, 11:00, and 12:00 from the 9 o'clock angular position of the timepiece surface shown in FIG.

When the external operation member 22 is rotated 90 degrees and the locking edge 26b reaches the angular position at 12:00, the locking body 32 of the solenoid plunger is locked by the locking edge 2 as shown in FIG.
6b is abutted, and further rotation of the external operation member 22 becomes impossible.

Then, the ten-key input panel 43 is operated to input the personal identification number, and if the input personal identification number matches the pre-registered personal identification number, an unlock signal is generated.

Then, the solenoid 30 is energized, and the plunger 31 is pulled into the solenoid against the elastic force and gravity of the plunger spring 34.

Therefore, the engagement between the locking body 32 and the locking end edge 26b, which are integral with this, is released, and the external operating member 22 can be rotated in the counterclockwise direction. As shown in FIG. 4, the unlocking is completed at the angular position where the locking cam 26 is rotated 180 degrees from the locking angular position as shown in FIG.

Incidentally, the meaning that the unlocking is completed here means
The locking cam 26 is released from the locking body 32, and the locking / unlocking rod 20 that rotates in conjunction with this drives the locking mechanism of the cylinder lock in the unlocking direction, so that the cylinder lock is unlocked. Is.

On the contrary, in order to lock the electric lock, the external operation member 22 is turned clockwise. Then, the locking cam 26 rotates counterclockwise.

At this time, the solenoid 30 is not energized, and the plunger 31 is in a position projecting downward due to the elastic force of the plunger spring 34. However, when the locking cam is rotated counterclockwise, its curved surface is eventually formed. The portion 26a comes into contact with the locking body 32, and thereafter, the curved surface portion 26a and the locking body 32 are contacted.
As described above, the locking body 32 is pushed up by the elastic force of the plunger spring 34 due to the wedge action caused by the engagement with the locking end edge 26b.

[0051]

As is apparent from the above description, the present invention utilizes the existing cylinder lock and the existing lock box having the lock mechanism for controlling the dead bolt, and uses the cylinder lock opened on the outer surface of the door. The cylinder lock is unlocked by inserting one end of the locking / unlocking rod that forms the stem of the duplication key into the key hole, and the rotation of this locking / unlocking rod is controlled by the solenoid, so the cylinder lock can be added slightly. The member can be converted into an electric lock.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of an electric lock according to an embodiment of the present invention.

2 is a partial sectional front view taken along line II-II of FIG.
The state where the electric lock is locked is shown.

FIG. 3 is a diagrammatic partial front view of a main part of an electric lock for explaining the operation of the present invention, showing a locked state.

FIG. 4 is a diagrammatic partial front view of the essential part of the electric lock for explaining the operation of the present invention, showing the unlocked state.

[Explanation of symbols]

 1 Door 2 Cylinder Lock 10 Base Plate 11 Mounting Bolt 16 Cover 20 Locking / Unlocking Rod 21 Stem Part 22 External Operating Member 26 Locking Cam 26a Curved Surface 26b Locking Edge 30 Solenoid 31 Plunger 34 Plunger Spring

Claims (1)

[Claims] 1. A retrofit lock box mounted on the outer surface of the door so as to cover the key hole of an existing cylinder lock opened on the outer surface of the door and to be called from the indoor side, and in the lock box. , One end of the stem of the lock key of the cylinder lock is inserted into the key hole of the cylinder lock, and the other end of the cylinder lock is connected to an external operation member that is rotatably supported and protrudes outside the lock box. The locking rod, a locking cam that is linked to the locking and unlocking rod and is supported so as to be rotatable in association with the rotation of the locking and unlocking rod and the external operating member, and the locking cam in the unlocking direction. A locking position that interferes with the movement locus, and a solenoid equipped with a plunger that is movably guided between an unlocking position separated from the movement locus and is biased in the locking position direction, Engage with the plunger in the locked position at a predetermined angular position around An electric lock characterized in that a locking end edge and a curved surface portion that engages with a plunger at the time of rotation for locking and pushes it in the unlocking position direction by a wedge action are connected.