Elastic sheet and electronic anti-disassembly device

Abstract

The utility model relates to the technical field of electronic tamper, in particular to an elastic piece and an electronic tamper device.The elastic piece comprises a fixing piece which is fixed on a circuit board and electrically connected with a first trigger point, the fixing piece is connected with a connecting piece which extends in the direction away from the circuit board and a deformation piece which is connected with the connecting piece; the deformation piece is connected with a conduction arm arranged at an interval with the second trigger point, the deformation piece can elastically deform to enable the conduction arm to move towards the second trigger point and make contact with the second trigger point to achieve electric communication with the second trigger point, the side, away from the connecting piece, of the fixing piece is further connected with a limiting piece, the limiting piece is provided with a limiting groove, and when the conduction arm moves towards the second trigger point, the limiting groove is matched with the limiting groove. And the limiting groove prevents the conduction arm from shifting out of the second trigger point, so that the lower end of the conduction arm can be in smooth contact with the second trigger point, and the electronic tag can be used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic anti-disassembly, in particular to the design of a spring piece and an electronic anti-disassembly device. Background Art

[0002] At present, electronic tags are widely used in object identification, and electronic tags must have a certain anti-disassembly function to prevent artificial disassembly or replacement. The Chinese utility model patent with the authorization announcement number CN 210349664U discloses an activation switch for ETC electronic tags and an ETC electronic tag. The electronic tag includes a circuit board and a trigger spring connected to the circuit board. The circuit board is provided with a first trigger point and a second trigger point arranged at intervals. The spring includes a fixing member fixed to the circuit board and electrically connected to the first trigger point, a first arc-shaped portion extending upward from one end of the fixing member, a connecting member connected to the first arc-shaped portion, and an extrusion portion connected to the connecting member. A conducting arm located above the second trigger point is provided on one side of the connecting member. Pressing the extrusion portion downward can make the conducting arm move downward and contact the second trigger point, so that the conducting arm is electrically connected to the second trigger point, thereby making the first trigger point and the second trigger point conductive. The trigger spring lacks constraints on both sides of the conducting arm. After multiple pressings, the conducting arm is easily deflected to one side of the second trigger point, resulting in the conduction arm being unable to contact the second trigger point, affecting the long-term use of the electronic tag. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the spring sheet used in the existing electronic anti-disassembly device lacks lateral constraints on the conducting arm. After long-term use, the conducting arm is prone to deflect to one side of the second trigger point, resulting in the conducting arm being unable to contact the second trigger point on the circuit board, affecting the long-term use of the electronic tag.

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a spring piece, which is used for conducting a first trigger point and a second trigger point arranged at intervals on a circuit board of an electronic anti-disassembly device, and is characterized in that it comprises a fixing member fixed on the circuit board and electrically connected to the first trigger point, the fixing member is connected to a connecting member extending in a direction away from the circuit board and a deforming member connected to the connecting member, the deforming member is connected to a conducting arm arranged at intervals from the second trigger point, and the deforming member can be elastically deformed to make the conducting arm move toward the second trigger point and electrically connected to the second trigger point;

[0005] A side of the fixing member away from the connecting member is further connected to a limiting member, wherein the limiting member has a limiting groove, and when the conducting arm moves toward the second trigger point, the limiting groove prevents the conducting arm from deviating to outside the second trigger point.

[0006] As a preferred embodiment, the limiting member includes a first plate-shaped portion and a second plate-shaped portion arranged relatively spaced apart, the first plate-shaped portion and the second plate-shaped portion are respectively fixed on both sides of the fixing member, the interval between the first plate-shaped portion and the second plate-shaped portion forms the limiting groove, and the second trigger point is located below the limiting groove.

[0007] As a preferred solution, the fixing member is a third plate-shaped portion arranged parallel to the circuit board.

[0008] As a preferred solution, the connecting member is a fourth plate-shaped portion arranged perpendicular to the circuit board.

[0009] As a preferred embodiment, the deformable member includes a fifth plate-shaped portion arranged parallel to the circuit board and a sixth plate-shaped portion extending obliquely upwardly from the limiting groove, wherein one end of the fifth plate-shaped portion away from the sixth plate-shaped portion is connected to the connecting member, and one end of the sixth plate-shaped portion away from the fifth plate-shaped portion is connected to the conductive arm.

[0010] As a preferred solution, a bending portion is provided between the upper end of the conducting arm and the sixth plate-shaped portion, and a reinforcing rib is provided in the middle of the bending portion.

[0011] As a preferred solution, one end of the conducting arm away from the sixth plate-shaped portion extends toward the second trigger point and is provided with a rolled portion.

[0012] As a preferred solution, the fixing member, the limiting member, the connecting member, the deforming member and the conducting arm are integrally stamped from a plate.

[0013] An electronic anti-tampering device comprises the above-mentioned shrapnel.

[0014] As a preferred solution, the fixing piece of the spring is welded on the circuit board of the electronic anti-disassembly device, and the first trigger point of the circuit board abuts against the fixing piece.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The spring piece of the utility model comprises a fixing part fixed on the circuit board and electrically connected to the first trigger point, the fixing part is connected to a connecting part extending away from the circuit board and a deforming part connected to the connecting part, the deforming part is connected to a conducting arm arranged at a distance from the second trigger point, the deforming part can be elastically deformed to make the conducting arm move toward the second trigger point and contact the second trigger point, so as to realize electrical connection with the second trigger point, and a limiting part is also connected to a side of the fixing part away from the connecting part, the limiting part has a limiting groove, when the conducting arm moves toward the second trigger point, the limiting groove blocks the conducting arm from deviating to the outside of the second trigger point, thereby ensuring that the lower end of the conducting arm can smoothly contact the second trigger point, thereby ensuring that the electronic tag can be used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric diagram of the spring of the utility model after being installed on a circuit board;

[0018] Figure 2 It is a side view of the spring piece of the utility model after being installed on the circuit board;

[0019] Figure 3 It is a schematic diagram of the shape change of the spring piece of the utility model when pressing the deformable member downward;

[0020] In the figure, 100, circuit board, 101, second trigger point, 1, fixing member, 2, connecting member, 3, limiting member, 31, limiting groove, 32, first plate-shaped portion, 33, second plate-shaped portion, 4, deformable member, 41, fifth plate-shaped portion, 42, sixth plate-shaped portion, 5, conducting arm, 6, rolled portion, 7, bending portion, 71, reinforcing rib. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. It should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0023] The spring piece of the utility model is used to conduct the first trigger point and the second trigger point 101 on the circuit board 100 of the electronic anti-disassembly device, and the second trigger point 101 and the first trigger point are arranged at intervals, such as Figures 1 to 3As shown, the spring piece includes a fixing member 1 fixed on the circuit board 100 and electrically connected to the first trigger point, the fixing member 1 is connected to a connecting member 2 extending away from the circuit board 100 and a deformable member 4 connected to the connecting member 2, the deformable member 4 is connected to a conducting arm 5 spaced apart from the second trigger point 101, the deformable member 4 can be elastically deformed to make the conducting arm 5 move toward the second trigger point 101 and electrically connected to the second trigger point 101; the side of the fixing member 1 away from the connecting member 2 is also connected to a limiting member 3, the limiting member 3 has a limiting groove 31, when the conducting arm 5 moves toward the second trigger point 101, the limiting groove 31 prevents the conducting arm 5 from deviating to the outside of the second trigger point 101.

[0024] Specifically, the second trigger point 101 is located below the limit slot 31, the lower part of the conduction arm 5 is inserted in the limit slot 31, and the upper end of the conduction arm 5 protrudes above the limit slot 31. When the deformable part 4 is pressed downward, the conduction arm 5 moves downward under the constraint of the limit slot 31. Therefore, the conduction arm 5 can be prevented from deflecting to one side of the second trigger point 101, thereby ensuring that the lower end of the conduction arm 5 can smoothly contact the second trigger point 101, thereby ensuring that the electronic tag can be used for a long time.

[0025] Among them, the limiting member 3 includes a first plate-shaped portion 32 and a second plate-shaped portion 33 arranged relatively at an interval. The first plate-shaped portion 32 and the second plate-shaped portion 33 are respectively fixed on both sides of the fixing member 1. The interval between the first plate-shaped portion 32 and the second plate-shaped portion 33 forms a limiting groove 31, and the second trigger point 101 is located below the limiting groove 31.

[0026] Specifically, the first plate-shaped portion 32 and the second plate-shaped portion 33 are both bent, the second trigger point 101 is located between the first plate-shaped portion 32 and the second plate-shaped portion 33 , and the second trigger point 101 is spaced apart from the first plate-shaped portion 32 and the second plate-shaped portion 33 .

[0027] In this embodiment, in order to ensure the connection stability between the fixing member 1 and the circuit board 100, the fixing member 1 is a third plate-shaped portion arranged parallel to the circuit board 100. Specifically, when installing the spring sheet, the lower end of the fixing member 1 is fitted with the upper end of the circuit board 100. Setting the fixing member 1 as the third plate-shaped portion can increase the contact area between the fixing member 1 and the circuit board 100, thereby ensuring the connection stability of the fixing member 1 on the circuit board 100.

[0028] In this embodiment, the connecting member is a fourth plate-shaped portion arranged perpendicular to the circuit board 100. The deformable member 4 includes a fifth plate-shaped portion 41 arranged parallel to the circuit board 100 and a sixth plate-shaped portion 42 extending obliquely above the limiting groove 31, and one end of the fifth plate-shaped portion 41 away from the sixth plate-shaped portion 42 is connected to the connecting member 2, and one end of the sixth plate-shaped portion 42 away from the fifth plate-shaped portion 41 is connected to the conducting arm 5.

[0029] Specifically, the fifth plate-shaped portion 41 and the sixth plate-shaped portion 42 are arranged at an obtuse angle, and one end of the conducting arm 5 away from the sixth plate-shaped portion 42 extends toward the direction close to the second trigger point 101 and is provided with a rolled portion 6. When the deformable member 4 is pressed downward, the lower end of the conducting arm 5 will produce a certain amount of horizontal movement relative to the second trigger point 101 when it contacts the second trigger point 101. In this embodiment, the lower end of the conducting arm 5 is provided with a rolled portion 6, which enables the lower end of the conducting arm 5 to slide directly with the second trigger point 101, and the outer peripheral side of the rolled portion 6 can always contact the upper end of the second trigger point 101, thereby ensuring the reliability of the electrical connection between the conducting arm 5 and the second trigger point 101.

[0030] In this embodiment, a bending portion 7 is provided between the upper end of the conductive arm 5 and the sixth plate-like portion 42, and a reinforcing rib 71 is provided in the middle of the bending portion 7. The reinforcing rib 71 increases the strength at the corner between the conductive arm 5 and the deformable member 4. When the deformable member 4 is pressed downward, the angle of the bending portion 7 remains unchanged, while the angle at the corner between the deformable member 4 and the connecting member changes.

[0031] In this embodiment, the fixing member 1, the limit member, the connecting member, the deformable member 4 and the conducting arm 5 are integrally stamped from a plate, and the connecting member is a fourth plate-shaped portion arranged perpendicular to the circuit board 100, thereby reducing the processing and manufacturing cost of the spring piece and facilitating mass processing of the spring piece. Specifically, the rolled portion 6 and the reinforcing ribs 71 arranged at the position of the bending portion 7 are both processed by stamping. In other embodiments of the utility model, the spring piece can be set as a split structure, that is, the first plate-shaped portion 32 and the second plate-shaped portion 33 are fixed to the end of the fixing member 1 by welding, and the fixing member 1, the connecting member, the deformable member 4 and the conducting arm 5 are integrally formed by stamping. Among them, the spring piece can be made of a stainless steel sheet or a copper sheet with good elasticity.

[0032] An embodiment of an electronic anti-tampering device includes the above-mentioned spring piece.

[0033] Specifically, the fixing member 1 is welded on the circuit board 100 of the electronic anti-disassembly device, the first trigger point of the circuit board 100 abuts against the fixing member 1, and the second trigger point 101 of the circuit board 100 is located in the limiting groove 31 of the spring sheet and is arranged with a relative spacing from the conducting arm 5 of the spring sheet. In order to facilitate the installation of the electronic anti-disassembly device at the desired position, in this embodiment, the electronic anti-disassembly device includes a shell, the circuit board 100 is arranged in the shell, and a notch is provided at the first end of the shell opposite to the spring sheet for the deformable member 4 to pass through the shell. The first end of the shell is connected to the outside of the device to be marked by bonding or bolting. After the shell is installed on the outer layer of the device, the device will press the deformable member 4, so that the conducting arm 5 moves in the direction close to the circuit board 100 and contacts the second trigger point 101. When the anti-disassembly device is removed from the device, the deformable member 4 is no longer pressed by the device and recovers under the action of its own elastic force, so that the conducting arm 5 is out of contact with the second trigger point 101.

[0034] In summary, the spring piece of the utility model includes a fixing member 1 fixed on the circuit board 100 and electrically connected to the first trigger point, and the two opposite ends of the fixing member 1 are respectively provided with a connecting member and a limiting member, and the limiting member is provided with a limiting groove 31 arranged opposite to the second trigger point 101 up and down; the end of the connecting member away from the fixing member 1 extends in the direction away from the circuit board 100 and is provided with a deformable member 4, and the end of the deformable member 4 away from the connecting member extends to the upper side of the limiting groove 31 and is provided with a conducting arm 5, and the lower part of the conducting arm 5 is inserted in the limiting groove 31, and pressing the deformable member 4 downward can make the lower end of the conducting arm 5 contact with the second trigger point 101, and the limiting groove 31 plays a role in constraining the conducting arm to prevent the conducting arm from deflecting to one side of the second trigger point 101, thereby ensuring that the lower end of the conducting arm can smoothly contact the second trigger point 101, thereby ensuring that the electronic tag can be used for a long time; in addition, the spring piece of the utility model can be integrally formed by stamping, which is convenient for mass processing, so that the spring piece of the utility model has the prospect of large-scale promotion.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A spring, used for conducting a first trigger point and a second trigger point (101) arranged at intervals on a circuit board (100) of an electronic anti-disassembly device, characterized in that: The invention comprises a fixing member (1) fixed on the circuit board (100) and electrically connected to the first trigger point, the fixing member (1) being connected to a connecting member (2) extending in a direction away from the circuit board (100) and a deforming member (4) connected to the connecting member (2), the deforming member (4) being connected to a conducting arm (5) spaced apart from the second trigger point (101), the deforming member (4) being elastically deformable so that the conducting arm (5) moves toward the second trigger point (101) and is electrically connected to the second trigger point (101); A limiting member (3) is also connected to a side of the fixing member (1) away from the connecting member (2); the limiting member (3) has a limiting groove (31); when the conducting arm (5) moves toward the second trigger point (101), the limiting groove (31) blocks the conducting arm (5) from deviating outside the second trigger point (101).

2. The shrapnel according to claim 1, characterized in that: The limiting member (3) comprises a first plate-shaped portion (32) and a second plate-shaped portion (33) which are arranged at a relative interval, the first plate-shaped portion (32) and the second plate-shaped portion (33) are respectively fixed on two sides of the fixing member (1), the interval between the first plate-shaped portion (32) and the second plate-shaped portion (33) forms the limiting groove (31), and the second trigger point (101) is located below the limiting groove (31).

3. The shrapnel according to claim 1, characterized in that: The fixing member (1) is a third plate-shaped portion arranged parallel to the circuit board (100).

4. The shrapnel according to claim 1, characterized in that: The connecting member is a fourth plate-shaped portion arranged perpendicular to the circuit board (100).

5. The shrapnel according to claim 1, characterized in that: The deformable member (4) comprises a fifth plate-shaped portion (41) arranged parallel to the circuit board (100) and a sixth plate-shaped portion (42) extending obliquely upwardly from the limiting groove (31); an end of the fifth plate-shaped portion (41) away from the sixth plate-shaped portion (42) is connected to the connecting member (2); and an end of the sixth plate-shaped portion (42) away from the fifth plate-shaped portion (41) is connected to the conducting arm (5).

6. The shrapnel according to claim 5, characterized in that: A bending portion (7) is provided between the upper end of the conducting arm (5) and the sixth plate-shaped portion (42), and a reinforcing rib (71) is provided in the middle of the bending portion (7).

7. The shrapnel according to claim 6, characterized in that: One end of the conducting arm (5) away from the sixth plate-shaped portion (42) extends in a direction close to the second trigger point (101) and is provided with a rolled portion (6).

8. The shrapnel according to claim 1, characterized in that: The fixing member (1), the limiting member (3), the connecting member (2), the deforming member (4) and the conducting arm (5) are integrally formed by stamping of a plate material.

9. An electronic anti-tampering device, characterized in that: The invention comprises the shrapnel described in any one of claims 1 to 8.

10. The electronic anti-tampering device according to claim 9, characterized in that: The fixing piece (1) of the spring sheet is welded on the circuit board (100) of the electronic anti-disassembly device, and the first trigger point of the circuit board (100) abuts against the fixing piece (1).

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