Burglar alarm with elastic sheet

Abstract

The utility model provides a burglar alarm carrying an elastic elastic sheet, which comprises a shell, a lock cylinder, an elastic sheet, a PCB (Printed Circuit Board) and a steel wire rope are arranged in the shell, and the elastic sheet extends towards one end to form a connecting sheet; and the connecting sheets are inserted into the insertion holes of the PCB and are fixed in a welding manner. A traditional wire is replaced by the connecting piece, and due to the fact that the connecting piece is stable in structure and high in strength, the lock cylinder is electrically connected with the PCB through the connecting piece, connection is more stable, and the lock cylinder is not prone to falling off. The connecting piece is positioned by inserting the inserting hole, the position of the connecting piece is more stable, and the connecting piece is fixed by welding, so that the mounting structure of the elastic piece is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft devices, in particular to an anti-theft device equipped with elastic spring sheets. Background Art

[0002] There is an anti-theft device used in supermarkets, which includes a U-shaped steel wire rope, one end of which is welded to a PCB board, and the other end is a lock pin, which, when inserted into a lock cylinder, enables a passage; when the steel wire rope is maliciously cut, the circuit is disconnected and the anti-theft device sounds an alarm.

[0003] The lock core is generally electrically connected to the PCB board through a spring clip. The traditional spring clip is connected to the PCB board through wires, which is not only unstable and has the risk of wires falling off, but also the spring clip is only clamped on the housing of the anti-theft device, and the stability of the installation structure is also relatively poor. Utility Model Content

[0004] In order to solve the technical problems in the background technology, the utility model discloses an anti-theft device equipped with an elastic spring sheet.

[0005] The utility model provides an anti-theft device equipped with an elastic spring sheet, comprising a housing, a lock core, a spring sheet, a PCB board and a steel wire rope are installed inside the housing, and a connecting sheet is extended to one end of the spring sheet;

[0006] The connecting piece is plugged into the plug hole of the PCB board and fixed by welding.

[0007] The utility model replaces the traditional wires with a connecting piece. Since the connecting piece has a stable structure and high strength, the lock core is electrically connected to the PCB board through the connecting piece, and the connection is more stable and not easy to fall off. The connecting piece is positioned by plugging into the plug hole, and its position is more stable, and it is fixed by welding, so that the installation structure of the spring piece is more stable.

[0008] The specific structure of the connecting piece plugging into the PCB board is as follows: a protruding plugging piece is arranged on the connecting piece, and the plugging piece is plugged into the plugging hole.

[0009] When the lock core is pulled by external force, a tensile force will be formed between the connecting piece and the PCB board, and the connecting piece is easy to tear and separate from the PCB board. Based on this, a further improvement is that a bow portion is also provided at the center of the connecting piece, so that the connecting piece has elasticity. The provision of the bow portion extends the length of the connecting piece, and can produce deformation under the action of elasticity, which can prevent the connecting piece from tearing and preventing the connecting piece from separating from the PCB board.

[0010] The shape of the arched portion directly affects the difficulty of forming it. Based on this, a further design is that the arched portion is U-shaped.

[0011] In order to improve the connection stability between the spring piece and the lock core, a further improvement is that: the spring piece is annular, and at least three elastic pressing pieces are extended from the other end thereof, which are arranged in rotational symmetry; the pressing piece is elastically connected to the outer wall of the lock core. In this arrangement, the pressing piece generates pressure between the lock core and the lock core under the action of elastic deformation, thereby improving the connection strength.

[0012] In order to further improve the connection stability between the pressing piece and the lock core, the pressing piece is wedge-shaped, and its constricted end is connected to the lock core; the constricted end of the pressing piece and the constricted end of the lock core are arranged opposite to each other. In this way, the deeper the pressing piece is sleeved on the lock core, the greater the deformation, the greater the pressure between the pressing piece and the lock core, and the higher the connection strength.

[0013] The edge of the end of the pressing piece is relatively sharp, and it is easy to scratch the hands during disassembly and assembly. Based on this, a further improvement is that the end of the pressing piece is semicircular.

[0014] The pressing piece is generally in point contact with the lock core, which is not only prone to wear and scratches on the lock core, but also causes poor contact. Based on this, a further improvement is that the semicircular end of the pressing piece is set as a contact piece; the contact piece is bent outward so that the inner side of the contact piece is in contact with the lock core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the installation structure of the spring piece and the lock core;

[0018] Figure 3 It is a schematic diagram of the structure of the shrapnel;

[0019] Figure 4 It is the front view of the shrapnel;

[0020] Figure 5 This is a bottom view of the shrapnel;

[0021] Figure 6 It is a schematic diagram of the structure of the pressing piece in the spring piece in the main viewing angle;

[0022] In the figure: 1. Shell; 2. Lock core; 3. Spring piece; 4. PCB board; 5. Steel wire rope; 6. Connecting piece; 7. Connecting piece; 8. Bow part; 9. Pressing piece; 10. Contact piece; 11. Buzzer. DETAILED DESCRIPTION

[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0024] Embodiment 1:

[0025] like Figure 1 As shown, the utility model discloses an anti-theft device equipped with an elastic spring, comprising a housing 1, in which a lock core 2, a spring 3, a PCB board 4 and a steel wire 5 are installed. The PCB board 4, the spring 3 and the lock core 2 are electrically connected. A buzzer is installed on the PCB board 4. One end of the steel wire 5 is plugged into the housing 1 and welded on the PCB board 4, and a lock pin is provided at the other end. When the anti-theft device needs to be locked, the other end of the steel wire 5 is inserted into the housing 1, and the lock pin is inserted into the lock core 2, so that a circuit is formed; if the steel wire 5 is maliciously cut, the circuit is disconnected, and the buzzer 11 sounds an alarm.

[0026] like Figure 3-6 As shown, the spring piece 3 is in a circular shape, and a vertically arranged connecting piece 6 is extended outward from the end of one side. Two parallel and spaced plug-in pieces 7 are arranged at the end of the connecting piece 6, which are plugged into the plug-in hole of the PCB board 4 and fixed by soldering.

[0027] The other end of the spring 3 is provided with four rotationally symmetrical pressing plates 9, and the heads of the pressing plates 9 are suspended in the air to make them elastic. In other embodiments, there may be three pressing plates 9. Figure 2 As shown, the pressing piece 9 is wedge-shaped, and its constricted end is connected to the outer wall of the lock core 2. The lock core 2 is also wedge-shaped, and the constricted end of the pressing piece 9 is arranged opposite to the constricted end of the lock core 2; in this way, the deeper the pressing piece 9 is sleeved on the lock core 2, the greater the deformation, the greater the pressure between the pressing piece 9 and the lock core 2, and the higher the connection strength.

[0028] The width of the pressing piece 9 decreases from the root to the head, which not only makes the structure of the pressing piece 9 more stable, but also makes the pressing piece 9 easier to deform, thereby facilitating the connection between the pressing piece 9 and the lock core 2.

[0029] The head of the pressing piece 9 is semicircular, so that the head of the pressing piece 9 has an arc transition, and it is not easy to scratch the hands during disassembly and assembly.

[0030] The utility model replaces the traditional wire with the connecting piece 6. Since the connecting piece 6 has a stable structure and high strength, the lock core 2 is electrically connected to the PCB board 4 through the connecting piece 6, and the connection is more stable and not easy to fall off; the connecting piece 6 is positioned by plugging into the plug hole, and its position is more stable, and it is fixed by welding, so that the installation structure of the spring piece 3 is more stable.

[0031] Embodiment 2:

[0032] Compared with the first embodiment, the difference is that a raised arched portion 8 is provided at the center of the connecting piece 6 by bending, so that the connecting piece 6 has elasticity. The arched portion 8 is U-shaped and easier to shape. The setting of the arched portion 8 extends the length of the connecting piece 6 and can be deformed under the action of elasticity, thereby preventing the connecting piece 6 from being torn and preventing the connecting piece 6 from being separated from the PCB board 4.

[0033] Embodiment three:

[0034] Compared with the first embodiment, the difference is that the semicircular end of the pressing piece 9 is set as a contact piece 10; the contact piece 10 is bent outward so that the inner side of the contact piece 10 contacts the lock core 2. This can avoid point contact between the pressing piece 9 and the lock core 2, causing wear and scratches on the lock core 2, and can also avoid poor contact.

[0035] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A burglar alarm equipped with an elastic spring, comprising a housing (1), inside which a lock cylinder (2), a spring (3), a PCB board (4) and a steel wire rope (5) are installed, characterized in that: The spring sheet (3) is provided with a connecting sheet (6) extending toward one end; The connecting piece (6) is plugged into the plug hole of the PCB board (4) and fixed by welding.

2. The anti-theft device equipped with elastic springs according to claim 1, characterized in that: The connecting piece (6) is provided with a protruding plug-in piece (7), and the plug-in piece (7) is plugged into the plug-in hole.

3. The anti-theft device equipped with elastic springs according to claim 1, characterized in that: A bowed portion (8) is also provided at the center of the connecting piece (6), so that the connecting piece (6) has elasticity.

4. The anti-theft device equipped with elastic springs according to claim 3, characterized in that: The arched portion (8) is U-shaped.

5. The anti-theft device equipped with elastic springs according to claim 1, characterized in that: The spring sheet (3) is annular, and at least three elastic pressing sheets (9) are extended from the other end thereof and are arranged in a rotationally symmetrical manner; The pressing sheet (9) is elastically connected to the outer wall of the lock core (2).

6. The anti-theft device equipped with elastic springs according to claim 5, characterized in that: The pressing sheet (9) is wedge-shaped, and its constricted end is connected to the lock core (2); The shrinking end of the pressing sheet (9) and the shrinking end of the lock core (2) are arranged opposite to each other.

7. The anti-theft device equipped with elastic springs according to claim 6, characterized in that: The end of the pressing sheet (9) is semicircular.

8. The anti-theft device equipped with elastic springs according to claim 7, characterized in that: The semicircular end of the pressing sheet (9) is arranged as a contact sheet (10); The contact piece (10) is bent outwards so that the inner side surface of the contact piece (10) contacts the lock core (2).

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