Self-locking device for cabinet door of file cabinet

Abstract

The utility model relates to a self-locking device for a cabinet door of a file cabinet. The self-locking device comprises an unlocking input device, a locking structure, a pair of receiving coil and induction coil which are matched with each other, and a self-locking module, the receiving coil is arranged on a cabinet door of the file cabinet and is electrically connected with the self-locking module; and the induction coil is arranged in the cabinet body of the file cabinet corresponding to the position of the receiving coil. The self-locking module is electrically connected with the unlocking input device, the locking structure and the receiving coil. Compared with the prior art, when the cabinet door of the file cabinet is opened, the locking structure of the file cabinet can be kept in an open state, and when the cabinet door of the file cabinet is closed, the locking structure is controlled to be automatically locked, so that the use safety and reliability of the file cabinet are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cabinet door self-locking structure, especially to a file cabinet door self-locking device. BACKGROUND

[0002] The file cabinet is a security device for storage and is an important part of a bank; it is used to store important documents to protect them from theft and damage.

[0003] The door lock structure of the existing file cabinet often needs to be locked after closing the cabinet door, and if this step is missed after closing the cabinet door, the important documents stored in the file cabinet may be stolen. The protection performance and safe reliability of the file cabinet need to be improved. INVENTION CONTENTS

[0004] The utility model aims at overcoming the defects of the prior art and provides a file cabinet door self-locking device.

[0005] The utility model can achieve the purpose by the following technical scheme:

[0006] A file cabinet door self-locking device comprises an unlocking input device and a locking structure, and further comprises a pair of matched receiving coil and induction coil and a self-locking module;

[0007] The receiving coil is arranged on the file cabinet door and is electrically connected with the self-locking module;

[0008] The induction coil is arranged in the file cabinet body corresponding to the position of the receiving coil;

[0009] The self-locking module is electrically connected with the unlocking input device, the locking structure and the receiving coil respectively.

[0010] As a preferred technical scheme, the self-locking module comprises a second controllable switch S2 which is normally closed, one end of the second controllable switch S2 is connected with a power supply, the other end is connected with a first controllable switch S1 which is normally open; the controlled end of the second controllable switch S2 is connected with the receiving coil;

[0011] The other end of the first controllable switch S1 opposite to the second controllable switch S2 is connected with a locking structure control switch K, the controlled end of the first controllable switch S1 is connected with the unlocking input device; and the two ends of the first controllable switch S1 are connected with a relay KM in parallel;

[0012] The locking structure control switch K is connected with the locking structure;

[0013] As a preferred technical scheme, an amplifier and a rising edge trigger are sequentially arranged between the receiving coil and the controlled end of the second controllable switch S2.

[0014] As a preferred technical solution, a freewheeling capacitor C is arranged in series with the relay KM in parallel with the first controllable switch S1.

[0015] As a preferred technical solution, the unlocking input device is one or a combination of a plurality of keyboard input type password locks, near field communication type password locks, and biometric identification type password locks.

[0016] As a preferred technical solution, the area of the receiving coil is smaller than the area of the induction coil.

[0017] As a preferred technical solution, a plurality of locking structures are arranged in the vertical direction of the cabinet door of the filing cabinet.

[0018] As a preferred technical solution, the locking structure includes a retractable lock tongue arranged in the cabinet door of the filing cabinet and extending through and out of the cabinet door.

[0019] As a preferred technical solution, the filing cabinet body is provided with a locking groove matched with the retractable lock tongue.

[0020] As a preferred technical solution, the diameter of the locking groove is greater than the outer diameter of the retractable lock tongue of the cabinet door of the filing cabinet.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model provides a filing cabinet door self-locking device, after opening the cabinet door, through the relay KM, the cabinet door control signal is maintained to give out continuously, makes the state of the cabinet door opening can keep. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic view of the utility model filing cabinet door self-locking device;

[0024] Figure 2 It is the front view of the filing cabinet;

[0025] Figure 3 It is the current schematic view of the utility model filing cabinet door self-locking device.

[0026] The figure mark shows: 1, unlocking input device, 21, receiving coil, 22, induction coil, 3, locking structure. DETAILED DESCRIPTION

[0027] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiments are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] Some embodiments of the utility model will be described in detail below in combination with the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] Embodiment 1

[0031] The utility model provides a file cabinet door self locking device, can maintain the locking structure 3 of file cabinet in the open state when the file cabinet door opens, and when the file cabinet door is closed, the locking structure 3 is automatically locked to improve the safety and reliability of file cabinet use.

[0032] As Figure 1 , 2 indicated, the file cabinet door self locking device provided by the utility model further includes a receiving coil 21 and an induction coil 22 matched with each other. The receiving coil 21 is arranged above the file cabinet door and is electrically connected with the self locking module; the induction coil 22 is arranged in the file cabinet body corresponding to the position of the receiving coil 21. The area of the receiving coil 21 is smaller than the area of the induction coil 22, and when the two are close, an induced current will be generated on the receiving coil 21 and input into the self locking module.

[0033] A plurality of locking structures are arranged in the vertical direction of the file cabinet door. In the embodiment, a retractable lock tongue is used as the locking structure, which is arranged in the file cabinet door, penetrates and extends, and a locking groove matched with the retractable lock tongue is arranged on the file cabinet body, and the diameter of the locking groove is greater than the outer diameter of the retractable lock tongue of the file cabinet door.

[0034] As Figure 3 indicated, the self locking module specifically includes a normally open first controllable switch S1, a normally closed second controllable switch S2 and a normally open locking structure control switch K connected in series, and the first controllable switch S1 is connected in parallel with a relay KM and a freewheeling capacitor C.

[0035] Wherein, the first controllable switch S1 is controlled by the unlocking input device 1, when the unlocking input device 1 receives the correct unlocking signal, an electrical signal is input to control the first controllable switch S1 to close. In this embodiment, the unlocking input device 1 can adopt any existing keyboard input type password lock, near field communication type password lock, biometric identification type password lock or a combination of multiple types. The receiving coil 21 will get an electrical signal to control the second controllable switch S2 to open after passing through an amplifier A and a rising edge trigger. The locking structure control switch K is a relay, which is conductive when powered on, and outputs a signal to the locking structure 3 to keep it open. When the locking structure control switch K is powered off, it is disconnected, causing the locking structure 3 to close again and the cabinet door to lock again.

[0036] The working process of the above device is as follows: when the unlocking input device 1 receives the unlocking signal, an electrical signal is input to the first controllable switch S1, and the normally open first controllable switch S1 is closed after receiving the electrical signal. At this time, the first relay KM coil is powered on and attracted, the relay K normally open contact becomes normally closed, the locking structure control switch K is closed, and the signal output to the locking structure 3 opens the cabinet door.

[0037] At this time, the current will pass through the normally closed S2 and then pass through the relay KM, still energizing the relay KM coil, so the coil will not lose power. Even if the unlocking input device 1 no longer inputs a signal, the signal output of the locking structure control switch K can still be guaranteed, maintaining the open state of the locking structure 3.

[0038] At this time, if the cabinet door is closed, the receiving coil 21 arranged on the cabinet door and the inductive coil 22 arranged on the cabinet body will approach each other and generate an induced current. After the induced current is amplified by an amplifier A, it is input to a rising edge trigger, and a control signal is output from the rising edge trigger to the second controllable switch S2 to open the second controllable switch S2. After a short time of freewheeling effect of the freewheeling capacitor C, the circuit will be cut off after the cabinet door is closed for a short time. At this time, the locking structure control switch K will be cut off, and the locking structure 3 will be closed to automatically lock the cabinet door.

[0039] When the cabinet door is locked, the circuit is reset: the first controllable switch S1, the relay KM and the locking structure control switch K return to normal open, and the second controllable switch S2 returns to normal closed, waiting for the next input of the unlocking signal.

[0040] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor based on the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments based on the existing technology within the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A self-locking device for a filing cabinet door, comprising an unlocking input device (1) and a locking structure (3), characterized in that, include: A pair of matched receiving coils (21) and induction coils (22) and a self-locking module; The receiving coil (21) is installed on the cabinet door and is electrically connected to the self-locking module; The induction coil (22) is installed inside the filing cabinet corresponding to the position of the receiving coil (21); The self-locking module is electrically connected to the unlocking input device (1), the locking structure (3), and the receiving coil (21).

2. The self-locking device for a filing cabinet door according to claim 1, characterized in that, The self-locking module includes a normally closed second controllable switch S2, one end of which is connected to a power source and the other end is connected to a normally open first controllable switch S1; the controlled end of the second controllable switch S2 is connected to a receiving coil (21). The other end of the first controllable switch S1 and the second controllable switch S2 is connected to the locking structure control switch K, and the controlled end of the first controllable switch S1 is connected to the unlocking input device (1); and a relay KM is connected in parallel between the two ends of the first controllable switch S1. The locking structure control switch K is connected to the locking structure (3).

3. The self-locking device for a filing cabinet door according to claim 2, characterized in that, An amplifier and a rising edge trigger are sequentially arranged between the receiving coil (21) and the controlled terminal of the second controllable switch S2.

4. The self-locking device for a filing cabinet door according to claim 2, characterized in that, A relay KM connected in parallel with the two ends of the first controllable switch S1 is connected in series with a freewheeling capacitor C.

5. The self-locking device for a filing cabinet door according to claim 1, characterized in that, The unlocking input device (1) is one or a combination of keypad input password lock, near-field communication password lock, and biometric password lock.

6. The self-locking device for a filing cabinet door according to claim 1, characterized in that, The area of ​​the receiving coil (21) is smaller than the area of ​​the induction coil (22).

7. A self-locking device for a filing cabinet door according to claim 1, characterized in that, Multiple locking structures (3) are provided along the vertical direction of the cabinet door.

8. A self-locking device for a filing cabinet door according to claim 7, characterized in that, The locking structure (3) includes a retractable locking tongue that is installed inside the cabinet door, passes through and extends out of the cabinet door.

9. A self-locking device for a filing cabinet door according to claim 8, characterized in that, The filing cabinet body is provided with a locking groove that cooperates with the retractable locking tongue.

10. A self-locking device for a filing cabinet door according to claim 9, characterized in that, The diameter of the locking groove is larger than the outer diameter of the retractable latch of the filing cabinet door.

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