A compact PCB layout anti-theft device
By replacing conductive sheets and wires in the anti-theft device, the problems of complex structure and increased volume of the existing anti-theft device are solved, and more stable circuit connections and more compact PCB board layout are achieved, reducing costs.
Patent Information
- Application Number
- CN202420642402.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-03-29
AI Technical Summary
Existing anti-theft devices require conductive sheets and wires when plugging the lock pin, resulting in complex structure, increased volume, increased cost and reduced practicality.
A clamping spring is used to replace the traditional conductive sheet and wire. The clamping spring is installed on one side of the PCB board, and a U-shaped clamping spring is installed on the other side. One end of the clamping spring is fixed with the PCB board and electrically connected. The other end is suspended, so that the clamping spring can be deformed and generates pressure when the lock needle is inserted, improving the connection strength and contact stability.
Through the use of the spring, the anti-theft device has a more stable structure, a more stable circuit, and a smaller space occupies, resulting in a more compact PCB board structure and a lower cost.
Smart Images
Figure CN222731309U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-theft devices, in particular to an anti-theft device with a compact PCB layout. Background Art
[0002] There is a burglar alarm used in shopping malls, whose lock pin passes through the commodity and is plugged into the lock cylinder of the burglar alarm, thereby realizing a circuit path; when the lock pin is maliciously removed, the circuit is disconnected and the alarm in the burglar alarm sounds an alarm.
[0003] When the lock pin is inserted into the lock cylinder, a conductive sheet is generally required to be connected between the lock pin and the PCB board to achieve electrical connection. The conductive sheet also needs to be connected to the PCB board through wires, which not only has a complex structure, but also takes up more space, thereby increasing the size of the anti-theft device, increasing the cost, and reducing practicality. Utility Model Content
[0004] In order to solve the technical problems in the background technology, the utility model discloses a compact PCB board layout type anti-theft device.
[0005] The utility model provides a compact PCB layout anti-theft device, comprising a housing and a lock pin, wherein a PCB board and a lock core are installed inside the housing, and the lock core is installed on one side of the PCB board;
[0006] A U-shaped retaining spring is installed on the other side of the PCB board, and the retaining spring is parallel to the PCB board; one end of the retaining spring is fixed to the PCB board and electrically connected, and the other end is suspended in the air so that the retaining spring can be deformed;
[0007] The retaining spring is provided with a slot, and the lock pin passes through the slot and is inserted into the lock core;
[0008] The slot width is smaller than the diameter of the locking pin.
[0009] When the lock pin is inserted into the lock core, the circuit path is completed, and the current flows into the PCB board, then flows through the retaining spring, the lock pin and the lock core in sequence, and finally flows into the PCB board; the arrangement of the slot causes the retaining spring to deform when the lock pin passes through the slot, and the width of the slot becomes larger, thereby generating pressure between the retaining spring and the lock pin, which not only improves the connection strength between the retaining spring and the lock pin, but also improves the contact stability between the retaining spring and the lock pin, thereby improving the stability of the circuit; the utility model replaces the traditional conductive sheet and wire with the retaining spring, which not only makes the structure of the retaining spring connecting the PCB board and the lock pin more stable, but also makes the circuit more stable; furthermore, the retaining spring occupies less space, making the PCB board structure more compact and the cost lower.
[0010] The connection structure between the clip and the PCB directly affects the elasticity of the clip and the stability of the clip structure. Based on this, further improvements are: the open end of the clip is fixedly connected to the PCB. In this way, the open end of the clip is connected through the PCB, which has greater elasticity when deformed and is more stable with the lock pin; the open end of the clip is connected to the PCB, which is more convenient than the bottom of the clip being connected to the PCB. In addition, the open end of the clip is suspended in the air, which is also prone to plastic deformation. Therefore, the open end of the clip is connected to the PCB to keep the clip structure stable.
[0011] The specific connection structure between the clamp spring and the PCB board is as follows: the opening end of the clamp spring vertically leads out a connecting rod, and the connecting rod is fixedly connected to the PCB board.
[0012] If the two arms of the circlip are straight, when the lock core is inserted into the slot, the two arms of the circlip will bend outwards, and after repeated use, it is easy to produce plastic deformation, thereby affecting the service life of the circlip. Based on this, further improvements are: the circlip includes a bottom in an arc shape; the two ends of the bottom are connected with a first connecting rod, a second connecting rod, a third connecting rod and a connecting rod in sequence; the spacing between the first connecting rods is smaller than the spacing between the second connecting rods; the second connecting rods form a slot; the spacing between the third connecting rods is smaller than the spacing between the second connecting rods. In this way, the total length of the bottom, the first connecting rod, the second connecting rod and the third connecting rod is greater than the length of the side wall of the circlip, thereby increasing the deformation capacity of the circlip; when the second connecting rod is widened under the drive of the lock pin, it is easier to open, thereby reducing the friction generated when the lock pin is inserted into the slot, achieving the purpose of labor saving; and when the second connecting rod is opened, the bottom, the first connecting rod and the third connecting rod provide the second connecting rod with sufficient deformation space, so that the second connecting rod is not easy to produce plastic deformation when it is repeatedly opened and closed, thereby extending the service life of the circlip.
[0013] The specific structure of the connection between the lock core and the PCB board is: the lock core is electrically connected to the PCB board through a connecting piece; the connecting piece is fixedly installed on one side of the PCB board.
[0014] In order to improve the connection stability between the connecting piece and the lock core, a further improvement is that the connecting piece is annular and is arranged coaxially with the lock core.
[0015] In the case of installation errors and processing errors, the connection piece may be separated from the lock core, thereby issuing an error alarm. Based on this, further improvements are: the inner circle of the connection piece is provided with a plurality of raised contact pieces; the contact piece is elastically connected to the lock core. The specific elastic connection structure is: the contact piece is bent toward one side of the connection piece, facing the lock core, and deforms when connected to the lock core. With this arrangement, when the lock core is installed, pressure is applied to the contact piece, causing the contact piece to deform and elastically connect to the lock core; when the lock core is away from the PCB board, the contact piece opens toward the lock core under the action of the elastic force, so that the contact piece always remains connected to the lock core. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is a structural schematic diagram of the hidden shell of the utility model;
[0019] Figure 3 is relative to Figure 2 , a structural diagram of the hidden parts of the lock core;
[0020] Figure 4 It is a structural schematic diagram of the connecting piece;
[0021] Figure 5 It is a structural diagram of the circlip;
[0022] Figure 6 This is the front view of the circlip;
[0023] In the figure: 1, housing; 2, locking pin; 3, PCB board; 4, lock core; 5, retaining spring; 6, connecting piece; 8, buzzer; 51, slot; 52, connecting rod; 53, bottom; 54, first connecting rod; 55, second connecting rod; 56, third connecting rod; 61, contact piece; 62, protrusion. DETAILED DESCRIPTION
[0024] 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.
[0025] Embodiment 1:
[0026] like Figure 1-3 As shown, the utility model discloses a PCB board layout compact anti-theft device, comprising a housing 1 and a lock pin 2. A PCB board 3 is installed inside the housing 1. A lock core 4 and a buzzer 8 are installed on one side of the PCB board, and a retaining spring 5 is installed on the other side.
[0027] The lock core 4 is electrically connected to the PCB board 3 through the connecting piece 6. The connecting piece 6 is annular and is coaxially arranged with the lock core 4, so that the contact area between the lock core 4 and the connecting piece 6 is large and the contact surface is evenly distributed, which can improve the connection stability between the lock core 4 and the connecting piece 6. Two symmetrically arranged protrusions 62 extend vertically from the edge of the connecting piece 6, and the protrusions 62 are plugged onto the PCB board 3 and fixed by soldering.
[0028] like Figure 5 and Figure 6As shown, the retaining spring 5 is U-shaped, including a bottom 53 in an arc shape; both ends of the bottom 53 are connected in sequence with a first connecting rod 54, a second connecting rod 55, a third connecting rod 56 and a connecting rod 52. The bottom 53, the first connecting rod 54, the second connecting rod 55 and the third connecting rod 56 are coplanar and parallel to the PCB board 3. The connecting rod 52 is perpendicular to the third connecting rod 56, so that the side of the retaining spring 5 is L-shaped. The connecting rod 52 is inserted into the PCB board 3 and fixed by soldering. The bottom 53, the first connecting rod 54, the second connecting rod 55 and the third connecting rod 56 are suspended in the air, so that the retaining spring 5 has elasticity and can be deformed. With such arrangement, the open end of the retaining spring 5 is connected through the PCB board 3, has greater elasticity when deformed, and is more stably connected to the locking pin 2; the connecting rod 52 is connected to the PCB board 3, and the connection is more convenient and has higher connection strength than the bottom 53 is connected to the PCB board 3, and the open end of the retaining spring 5 is suspended in the air, which is also prone to plastic deformation. Therefore, the open end of the retaining spring 5 is connected to the PCB board 3, which can keep the structure of the retaining spring 5 stable.
[0029] The spacing between the first connecting rods 54 is smaller than the spacing between the second connecting rods 55; the second connecting rods 55 form a slot 51, the slot width of which is smaller than the diameter of the locking pin 2; the spacing between the third connecting rods 56 is smaller than the spacing between the second connecting rods 55. In this way, the total length of the bottom 53, the first connecting rod 54, the second connecting rod 55 and the third connecting rod 56 is greater than the length of the side wall of the clip 5, thereby increasing the deformation capacity of the clip 5; when the second connecting rod 55 is widened under the drive of the locking pin 2, it is easier to open, thereby reducing the friction generated when the locking pin 2 is inserted into the slot 51, achieving the purpose of labor saving; and when the second connecting rod 55 is opened, the bottom 53, the first connecting rod 54 and the third connecting rod 56 provide the second connecting rod 55 with sufficient deformation space, so that the second connecting rod 55 is not easy to produce plastic deformation when it is repeatedly opened and closed, thereby extending the service life of the clip 5.
[0030] When the lock pin 2 is inserted into the lock core 4, the circuit path is completed, and the current flows from the PCB board 3, then flows through the retaining spring 5, the lock pin 2 and the lock core 4 in sequence, and finally flows into the PCB board 3. When the circuit is disconnected, the buzzer 8 sounds an alarm. The arrangement of the slot 51 causes the retaining spring 5 to deform when the lock pin 2 passes through the slot 51, and the width of the slot 51 increases, thereby generating pressure between the retaining spring 5 and the lock pin 2, which not only improves the connection strength between the retaining spring 5 and the lock pin 2, but also improves the contact stability between the retaining spring 5 and the lock pin 2, thereby improving the stability of the circuit; the utility model replaces the traditional conductive sheet and wire with the retaining spring 5, which not only makes the structure of the retaining spring 5 connecting the PCB board 3 and the lock pin 2 more stable, but also makes the circuit more stable; in addition, the retaining spring 5 occupies a small space, making the structure of the PCB board 3 more compact and the cost lower.
[0031] Embodiment 2:
[0032] Compared with the first embodiment, the difference is: Figure 4As shown, the inner circle of the connecting piece 6 is provided with a plurality of contact pieces 61 protruding inward; the contact piece 61 is bent toward one side of the connecting piece 6, facing the direction of the lock core 4, so that the contact piece 61 is elastic. The contact piece 61 is deformed when connected to the lock core 4, and is in a coplanar state with the connecting piece 6. With such a configuration, when the lock core 4 is installed, pressure is applied to the contact piece 61, so that the contact piece 61 is deformed and elastically connected to the lock core 4; when the lock core 4 is away from the PCB board 3, the contact piece 61 opens toward the lock core 4 under the action of the elastic force, so that the contact piece 61 always maintains a connection state with the lock core 4.
[0033] 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 PCB board layout compact anti-theft device, comprising a housing (1) and a lock pin (2), wherein a PCB board (3) and a lock core (4) are installed inside the housing (1), characterized in that: The lock core (4) is installed on one side of the PCB board (3); A U-shaped retaining spring (5) is installed on the other side of the PCB board (3), the retaining spring (5) is parallel to the PCB board (3), one end of the retaining spring is fixed to the PCB board (3) and electrically connected, and the other end is suspended in the air so that the retaining spring (5) can be deformed; The clamping spring (5) is provided with a slot (51), and the locking pin (2) passes through the slot (51) and is inserted into the lock core (4); The slot width of the slot (51) is smaller than the diameter of the locking pin (2).
2. A compact PCB layout anti-theft device according to claim 1, characterized in that: The open end of the clamping spring (5) is fixedly connected to the PCB board (3).
3. A compact PCB layout anti-theft device according to claim 2, characterized in that: A connecting rod (52) is vertically led out from the open end of the clamping spring (5), and the connecting rod (52) is fixedly connected to the PCB board (3).
4. The compact PCB layout anti-theft device according to claim 3, characterized in that: The clamping spring (5) comprises a bottom (53) in a superior arc shape; The two ends of the bottom (53) are sequentially connected with a first connecting rod (54), a second connecting rod (55), a third connecting rod (56) and a connecting rod (52); The spacing between the first connecting rods (54) is smaller than the spacing between the second connecting rods (55); A slot (51) is formed between the second connecting rods (55); The spacing between the third connecting rods (56) is smaller than the spacing between the second connecting rods (55).
5. The compact PCB layout anti-theft device according to claim 1, characterized in that: The lock core (4) is electrically connected to the PCB board (3) via a connecting piece (6); The connecting piece (6) is fixedly mounted on one side of the PCB board (3).
6. The compact PCB layout anti-theft device according to claim 5, characterized in that: The connecting piece (6) is annular and is arranged concentrically with the lock core (4).
7. The compact PCB layout anti-theft device according to claim 6, characterized in that: The inner circle of the connecting piece (6) is provided with a plurality of raised contact pieces (61); The contact piece (61) is elastically connected to the lock core (4).
8. The compact PCB layout anti-theft device according to claim 7, characterized in that: The contact piece (61) is bent toward one side of the connecting piece (6) and in a direction facing the lock core (4), so that the contact piece (61) has elasticity; The contact piece (61) is deformed when connected to the lock core (4) and becomes coplanar with the connecting piece (6).