JPH0113164Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alarm activation mechanism in a code lock that can secretly generate an alarm during an unlocking operation.

Conventional alarm devices in safes and the like can only issue an alarm when an abnormal situation occurs, such as the lock being broken or the door being forcibly opened. Therefore, even under threat of robbery or the like, if the manager of the safe unlocks the safe through normal operations, it is impossible to issue an alarm or generate an alarm. Therefore, the purpose of the present invention is to provide a coded lock that can secretly generate an alarm without being noticed by the intimidator during the normal unlocking process when the lock is unlocked due to threats or the like. do.

Therefore, in order to achieve the above purpose, this invention
A plurality of tumblers each having a first gate and rotatably supported on the same axis, and when the first gate of each of the tumblers is aligned to the unlocked position, each of the first gates A fence that fits in and integrates the tumblers and swings as the tumblers rotate, an arm that swings integrally in conjunction with the fence, and a fence that moves forward and forward by swinging the arm. In the code lock having a retracting bar, a second gate is formed on one of the tumblers, and a magnet is attached to the tumbler in which the second gate is formed, and the second gate of the tumbler and the other A reed switch is disposed near the tumbler equipped with the magnet so that when the first gate of the tumbler is aligned with the unlocked position and each tumbler is rotated, the contact is closed by the magnet. A switch was arranged in conjunction with the bolt so that the contact would close when the bolt moved backward, and one terminal of each of the reed switch and the switch was connected to each other, and the other terminal was connected to an alarm device, respectively. .

The present invention will be described in detail below with reference to the accompanying drawings showing a preferred embodiment thereof.

FIG. 1 is a perspective view showing the back side of one embodiment of the code lock of the present invention with the tumbler pack removed. In the figure, reference numeral 11 denotes a lock box, and a dial (not shown) is attached to the surface of the lock box 11 on the center line A.
A spindle is connected to this dial,
A drive disk 12 with a hub 13 is secured to the spindle by means of a key. The drive disk 12 is provided with a notch 14,
When the drive disk 12 is rotated clockwise in the drawing, that is, in the direction of arrow B, the fence 22 of the bell crank 21 engages with the notch 14, and the bell crank 21 is rotated counterclockwise. bell crank 21
Since the arm 23 is engaged with the recess 25 of the lock 24, the arm 23 slides into the recess 25 and causes the lock 21 to retreat. 17 is a reed switch attached near the tumbler. Reference numeral 18 denotes a micro switch, which is attached in conjunction with the bolt 24 so that its contact closes when the bolt 24 is moved back. One terminal of each of the reed switch 17 and the micro switch 18 is connected to each other. 17a, 18
a is reed switch 17, micro switch 1
The other terminals of each of the terminals 8 are led out of the lock box 11 and connected to an activation member of an alarm device (not shown).

30 is a tumbler pack attached to the back cover 16. The tumbler pack 30 is composed of three tumblers 31, 32, 33, each of which is rotatably supported by a shaft, and this shaft portion constitutes a cylindrical journal 34. . The journal 34 pivotally supports the hub 13 when the back cover 16 is attached to the lock box 11. A first gate is formed in each of the tumblers 31, 32, and 33 to allow insertion of the fence 22, and a fly is fixed on one side and a pin is fixed on the other side. The tumbler 31 has a first gate 31
In addition to the first gate 31a, a second gate 31a' is formed at a position separated by [+10] graduations from the first gate 31a. Furthermore, a magnet 40 is attached to the outer periphery of the tumbler 31.
is buried there. FIG. 2 shows the fly 31b of the tumbler 31 and the pin 32c of the tumbler 32 that engages with the fly 31b, and further shows each gate 31a,
The positional relationship between 31a', magnet 40, and reed switch 17 is shown.

Next, the unlocking operation of the code lock having the above configuration will be described in detail. By rotating the dial correctly, the pin 15 of the drive disk 12 first engages with the fly of the tumbler 33, and the tumbler 3
3 rotates. Next, the pin of tumbler 33 engages with the fly of tumbler 32, and tumbler 32 rotates. Then, the pin 32c of the tumbler 32 engages with the fly 31b of the tumbler 31, and the tumbler 31 rotates. By rotating the dial in this way, the drive disk 12 is rotated, and the tumbler 33, tumbler 32, and tumbler 3 are sequentially rotated.
1 and can be rotated. Therefore, when unlocking, first rotate the dial until the gate 31a of the tumbler 31 is in the unlocked position. Next, the dial is rotated in the opposite direction to align the gate of the tumbler 32 to the same unlocked position as the gate 31a, and also rotated in the opposite direction to align the gate of the tumbler 33 to the unlocked position. After aligning all the gates to the unlocked position, turn the dial in the direction of arrow B, which is the opposite direction to when the last tumbler 33 was turned, and the notch 14 of the drive disk 12 will open.
The fence 22 of the bell crank 21 engages with.
When the dial is further rotated, the fence 22 is fitted into each gate, the tumbler pack 30 rotates together with the drive disk 12, and the arm 23 moves the bolt 24 backward. The dial is bolt 24
can be rotated until it is completely accommodated within the lock box 11. This completes the unlocking process. The direction of rotation of the dial when unlocking is to rotate the drive disk 12 clockwise as indicated by arrow B, so when rotating the tumbler 33, the direction of rotation of the dial is counterclockwise,
2 is rotated clockwise, and the tumbler 31 is rotated counterclockwise. The dial is
If there are four or more tumblers, rotate them alternately in the same way. The mechanism and unlocking operation described above are no different from conventional code locks.

Next, the alarm device operating mechanism of the present invention and the operation for generating an alarm will be described in detail. tumbler 31
A second gate 31a' is provided, and a magnet 40 is embedded therein. To unlock using this gate 31a', when operating the dial, gate 31a'
In other words, in the illustrated embodiment, it is necessary to rotate the dial by an additional [+10] scale. In the case of normal unlocking, the upper dial in FIG. 2 is rotated in the direction of arrow C to align the gate 31a of the tumbler 31 and the fence 22. At this time, the magnet 40 is located slightly above and to the right from the lowest position. Furthermore, by operating the dial described above, the gates of each tumbler 32 and 33 are set to the fence 22.
be consistent with When the dial is then further rotated in the direction of arrow C, the notch 14 of the drive disk 12 and the arm 23 of the bell crank 21 engage, and as the drive disk 12 rotates, the fence 23 is moved to the gate 31a. They fit in and rotate as one. Therefore, the magnet 40 moves further upward and separates from the reed switch 17, so that the reed switch 17 will not operate when the lock is unlocked.

Next, the operation for unlocking in an emergency will be explained in detail. First, the second gate 31 of the tumbler 31
Align a' with the fence 22. in this case,
You will have to turn the dial an additional [+10] scale compared to the normal unlocking described above. At this time, the magnet 40 is located slightly to the left of the bottom position. In this position the magnet 40 acts on the reed switch 17 causing its contacts to close. Next, the gates of each tumbler 32, 33 are aligned with the fence 22 by the dial operation described above. Next, when the dial is rotated in the direction of arrow B, the drive disk 12 and tumbler 31 rotate together, and the magnet 4
0 stops at a position slightly past the lowest position. Even at this point, the contacts of the reed switch 17 remain closed. Since one terminal of the reed switch 17 and the micro switch 18 are connected in series, when the bolt 24 is retracted, the micro switch 1
Contact point 8 is closed and conduction occurs between terminals 17a and 18a. By connecting these terminals to activation terminals of a known tape dialer, digital transmitter, etc., it is possible to activate an alarm device at a police station or a security insurance company.

As mentioned above, dial operators usually use codes [30], [50], and [70] as code numbers for unlocking, but when they are threatened or raise an alarm, they use the code number [40]. , [50], [70] to unlock. This operation is completely indistinguishable from normal operation by someone who does not know the code number, so the alarm device can be activated at the same time as the lock is unlocked without arousing any suspicion. Encrypt tumbler 31 as usual [30]
When unlocking with
Since the lock is unlocked at a position shifted by [+10] scale from 7, the reed switch 17 is not activated and the alarm device is not activated. Magnet 40 during unlocking operation
may pass through the driven range of the reed switch 17, but in the locked state, the contacts of the micro switch 18 are open, so the alarm device will not operate.

In the illustrated embodiment, the tumbler 31 is provided with the second gate 31a' and the magnet 40, but these may be provided in any tumbler. The distance between the first gate and the second gate can also be made closer or further apart as long as the reed switch does not malfunction. The reed switch may be installed anywhere in the lockbox, for example, on the lid. There are no restrictions on the type or installation location of the microswitch, as long as it is conductive only when the lock is unlocked.

As mentioned above, if the mechanism of the present invention is used in a code lock for a safe, etc., it will be possible to issue a warning safely and reliably in an emergency, and it will be of great practical benefit.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the back side of the code lock of the present invention, with the back cover and tumbler pack removed. FIG. 2 is a front view showing the positional relationship between a tumbler provided with a second gate and a magnet, and a reed switch. 12... Drive disk, 17... Reed switch, 18... Micro switch, 21... Bell crank, 22... Fence, 23... Arm, 24... Bard,
30... Tumbler pack, 31, 32, 33... Tumbler, 31a... First gate, 31a'... Second gate, 40... Magnet.

Claims (1)

[Claims for Utility Model Registration] When a plurality of tumblers each having a first gate are rotatably supported on the same axis, and the first gate of each of the tumblers is aligned to the unlocked position. a fence that fits into each of the first gates to integrate the tumblers and swings as the tumblers rotate; an arm that swings integrally in conjunction with the fence; and an arm that swings integrally in conjunction with the fence; A code lock that has a lock that moves forward and backward by the rocking of the lock, wherein a second gate is formed on one of the tumblers, a magnet is attached to the tumbler with the second gate formed thereon, and the tumbler is equipped with a magnet. The second gate of the tumbler and the first gate of the other tumbler are aligned with the unlocked position, and when each tumbler is rotated, the reed switch is installed on the tumbler equipped with the magnet so that the contact point is closed by the magnet. placed nearby,
Further, a switch is disposed in conjunction with the bolt so that the contact closes when the bolt is retracted, and further, one terminal of each of the reed switch and the switch is connected to each other, and the other terminal is connected to the alarm device, respectively. An alarm device operating mechanism in a code lock characterized by being connected.