Conductive shrapnel

Abstract

The present application provides a conductive spring sheet, which relates to the field of circuit technology. The conductive spring sheet includes a base, a first bending portion, a first elastic arm and a second elastic arm; one end of the first bending portion is connected to one end of the base; the first elastic arm is arranged at an angle with the base, and one end of the elastic arm is connected to the other end of the first bending portion; the second elastic arm is located between the base and the first elastic arm, one end of the second elastic arm is connected to the first elastic arm, and the other end is extended toward the base and spaced apart from the base. The present application sets the second elastic arm, so that when the pressure on the first elastic arm that causes it to bend toward the base is too large, the second elastic arm abuts against the base, and then the pressure on the first bending portion is shared by the second elastic arm, so as to reduce the pressure on the first bending portion and improve the deformation of the first elastic arm. In this way, the conductive spring sheet can be prevented from being plastically deformed due to excessive pressure.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a conductive spring. Background Art

[0002] Shrapnel, also known as spring sheet or elastic sheet, is a material with good elasticity and fatigue resistance. It is widely used in various engineering machinery, instrumentation, automobiles, motorcycles and other fields, bringing convenience and efficiency to the control of these fields. Among them, in the field of communications, the shrapnel is a conductive shrapnel, which is mainly used for the contact connection of the circuit. For example, the contact connection between circuit modules and the contact connection between circuit modules and power supply will use conductive shrapnel to achieve contact conductive function, thereby electrically connecting the two circuits. And after the conductive shrapnel is squeezed to elastic deformation, the relevant circuit can be disconnected.

[0003] At present, the conductive spring sheet includes a base, a bending portion and an elastic arm. The two ends of the bending portion are respectively connected to the base and the elastic arm, so that the base and the elastic arm are arranged at an acute angle. A contact portion is arranged on the side of the elastic arm away from the base. In this way, the angle between the base and the elastic arm can be used to provide an elastic force for the contact portion to abut against the circuit and an elastic deformation of the elastic arm to bend toward the base. Among them, the base is connected to one circuit, and the other circuit is pressed on the contact portion, so that the two circuits are connected through the conductive spring sheet. When the elastic arm is pressed toward the base so that the contact portion is out of contact with the corresponding circuit, the two circuits can be disconnected. However, the existing conductive spring sheet is prone to plastic deformation when it is subjected to excessive pressure because it has no protective structure. Utility Model Content

[0004] The embodiments of the present application provide a conductive spring sheet, which can improve the problem of plastic deformation of the conductive spring sheet caused by excessive pressure.

[0005] An embodiment of the present application provides a conductive spring sheet, which includes a base, a first bending portion, a first elastic arm and a second elastic arm; one end of the first bending portion is connected to one end of the base; the first elastic arm is arranged at an angle to the base, and one end of the elastic arm is connected to the other end of the first bending portion; the second elastic arm is located between the base and the first elastic arm, one end of the second elastic arm is connected to the first elastic arm, and the other end is extended toward the base and spaced apart from the base.

[0006] In one embodiment, one end of the second elastic arm is connected to an end of the first elastic arm away from the first bending portion.

[0007] In one embodiment, the conductive spring further includes a second bending portion, which is disposed between the first elastic arm and the second elastic arm, with two ends of the second bending portion respectively connected to the first elastic arm and the second elastic arm, and an inner concave surface of the second bending portion faces the base.

[0008] In one embodiment, an included angle α is formed between the second elastic arm and the first elastic arm, satisfying: 10°≤α≤80°.

[0009] In one embodiment, the conductive spring further includes a stop arm, a limit plate is provided at one end of the second elastic arm close to the base, one end of the stop arm is connected to the base, and the other end is located on a side of the limit plate away from the base.

[0010] In one embodiment, there are two blocking arms, and the two blocking arms are symmetrically distributed along the extending direction of the first elastic arm.

[0011] In one embodiment, the blocking arm is L-shaped, one end of which is vertically connected to the base, and the other end of which is parallel to the limiting plate.

[0012] In one embodiment, the plane where the angle between the first elastic arm and the base is located is the first plane. In the direction perpendicular to the first plane, the limit plate has a first width dimension, and the end of the second elastic arm connected to the limit plate has a second width dimension, and the first width dimension is greater than the second width dimension.

[0013] In one embodiment, the first bending portion includes a first corner portion, a vertical portion and a second corner portion connected in sequence, the end of the first corner portion away from the vertical portion is connected to the base, the end of the second corner portion away from the vertical portion is connected to the first elastic arm, and the vertical portion is perpendicular to the base.

[0014] In one embodiment, the conductive spring is applied to the PCBA, and a PCB soldering foot is provided on a side of the base away from the first elastic arm, and the PCB soldering foot is configured to be electrically connected to a circuit of the PCBA.

[0015] In one embodiment, the conductive spring piece is a bent piece.

[0016] Beneficial effects of the embodiments of the present application:

[0017] In the embodiment of the present application, by providing a second elastic arm and making the second elastic arm located between the first elastic arm and the base, when the pressure on the first elastic arm that causes it to bend toward the base is too large, the second elastic arm can be brought into contact with the base, and the pressure on the first bending portion can be shared by the second elastic arm to reduce the pressure on the first bending portion and improve the deformation of the first elastic arm. In this way, the conductive spring can be prevented from being plastically deformed due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic diagram of the structure of a conductive spring provided in an embodiment of the present application;

[0020] Figure 2 is a side view of a conductive spring provided in an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of a conductive spring provided in an embodiment of the present application connecting two circuits;

[0022] Figure 4 is a side view of another conductive spring provided in an embodiment of the present application;

[0023] Figure 5 yes Figure 3 Sectional view of AA in the middle;

[0024] Figure 6 It is a top view provided by an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 001-conductive spring; 011-base; 012-first bending portion; 121-contact portion; 122-first corner portion; 123-vertical portion; 124-second corner portion; 125-horizontal portion;

[0027] 013-first elastic arm; 131-first section; 132-second section; 014-second elastic arm;

[0028] 015 - second bending portion; 016 - stop arm; 017 - limit plate; 018 - PCB solder foot; 019 - first circuit; 020 - second circuit. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0033] To facilitate understanding of the scheme of the present application, the spline curves and arrows used in the drawings are explained here: the components indicated by the spline curves without arrows are solid components, that is, components with solid structures; the components indicated by the spline curves with arrows are virtual components, that is, components without solid structures.

[0034] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of a conductive spring 001 provided in an embodiment of the present application, Figure 2 01 is a side view of a conductive spring sheet 001 provided in an embodiment of the present application. An embodiment of the present application provides a conductive spring sheet 001. The conductive spring sheet 001 includes a base 011, a first bent portion 012, a first elastic arm 013 and a second elastic arm 014. One end of the first bent portion 012 is connected to one end of the base 011. The first elastic arm 013 is arranged at an angle to the base 011. One end of the elastic arm is connected to the other end of the first bent portion 012. The second elastic arm 014 is located between the base 011 and the first elastic arm 013. One end of the second elastic arm 014 is connected to the first elastic arm 013, and the other end is extended toward the base 011 and is spaced apart from the base 011.

[0035] It can be understood that the conductive spring piece 001 has conductivity, for example, the conductive spring piece 001 can be an elastic metal sheet.

[0036] The elastic arm is connected to the first circuit 019 by contact, and the base 011 is electrically connected to the second circuit 020. Figure 3 As shown, Figure 3Schematic diagram of the conductive spring 001 provided in the embodiment of the present application connecting two circuits. Specifically, a contact portion 121 is provided at the connection between the first bending portion 012 and the second elastic arm 014, and the contact portion 121 is provided on the side of the connection away from the base 011. The first bending portion 012 is contact-connected with the first circuit 019 through the contact portion 121. Figure 3 In the figure, the dotted line shows that the conductive spring piece 001 is bent toward the base 011 after being pressed, so that the contact portion 121 is out of contact with the first circuit 019, so that the first circuit 019 and the second circuit 020 are disconnected.

[0037] In addition, the distance between the end of the second elastic arm 014 extending toward the base 011 and the base 011 can be set accordingly according to the application scenario of the conductive spring sheet 001. For example, when the conductive spring sheet 001 is used in a scenario where two circuits are disconnected by impact at a relatively high speed, the distance can be set to be relatively small, so that after the contact portion 121 is disconnected from the corresponding circuit, as the first elastic arm 013 is further deformed, the second elastic arm 014 can contact the base 011, so that the pressure on the first bent portion 012 is shared by the second elastic arm 014, thereby reducing the influence of excessive pressure on the first bent portion 012.

[0038] Exemplarily, the conductive spring 001 is a bent piece. Specifically, firstly, metal sheets of various structures of the conductive spring 001 are punched out on a plate, and then the remaining structures except the substrate are bent relative to the substrate, so as to form the conductive spring 001.

[0039] In this embodiment, the second elastic arm 014 is provided and located between the first elastic arm 013 and the base 011, so that when the pressure on the first elastic arm 013 to bend toward the base 011 is too large, the second elastic arm 014 can be brought into contact with the base 011, and the pressure on the first bending portion 012 can be shared by the second elastic arm 014 to reduce the pressure on the first bending portion 012 and improve the deformation of the first elastic arm 013. In this way, the conductive spring 001 can be prevented from being plastically deformed due to excessive pressure.

[0040] See also Figure 2 In one embodiment, one end of the second elastic arm 014 is connected to one end of the first elastic arm 013 away from the first bending portion 012 .

[0041] In this embodiment, through the above configuration, the second elastic arm 014 and the first elastic arm 013 can be formed by bending the same metal sheet, thereby reducing the difficulty of forming the conductive spring sheet 001 and improving the forming efficiency of the conductive spring sheet 001 .

[0042] See also Figure 4 , Figure 4 It is a side view of another conductive spring sheet 001 provided in an embodiment of the present application. In another embodiment, the second elastic arm 014 is connected to an end of the first elastic arm 013 close to the first bending portion 012 .

[0043] See also Figure 3 In one embodiment, the conductive spring 001 further includes a second bending portion 015. The second bending portion 015 is disposed between the first elastic arm 013 and the second elastic arm 014. Both ends of the second bending portion 015 are respectively connected to the first elastic arm 013 and the second elastic arm 014, and the inner concave surface of the second bending portion 015 faces the base 011.

[0044] Exemplarily, the second bending portion 015 is an arc structure. Specifically, the plane where the angle between the first elastic arm 013 and the base 011 is located is the first plane, and in the first plane, the projection of the second bending portion 015 is a fan-shaped ring, and its center angle is 95° to 175°. Optionally, the center angle of the second bending portion 015 is 170°, so that the distance between the part of the conductive spring 001 other than the contact portion 121 and the circuit corresponding to the contact portion 121 can be increased to facilitate the layout of related electronic devices.

[0045] In addition, the outer convex surface of the second bending portion 015 is the contact portion 121 .

[0046] In this embodiment, the above configuration allows the first elastic arm 013 to smoothly transition to the second elastic arm 014 , thereby improving the stress on the connection between the first elastic arm 013 and the second elastic arm 014 , thereby improving the reliability of the conductive spring 001 .

[0047] See also Figure 2 In one embodiment, an angle α is formed between the second elastic arm 014 and the first elastic arm 013, satisfying: 10°≤α≤80°.

[0048] It will be appreciated that the angle α includes but is not limited to 10°, 15°, 17.6°, 20°, 28°, 30°, 36°, 45°, 50°, 52°, 60°, 66°, 70°, 72°, 76°, 78°, and 80°.

[0049] Furthermore, 30°≤α≤50°.

[0050] In this embodiment, through the above-mentioned arrangement, on the one hand, the angle between the second elastic arm 014 and the first elastic arm 013 is an acute angle, so that the second elastic arm 014 can extend toward the portion of the base 011 opposite to the first elastic arm 013, thereby controlling the overall size of the conductive spring piece 001; on the other hand, the connection between the second elastic arm 014 and the first elastic arm 013 can have suitable elasticity and elastic deformation range, thereby improving the reliability of the conductive spring piece 001.

[0051] See also Figure 1 In one embodiment, the conductive spring 001 further includes a stop arm 016. A limit plate 017 is disposed at one end of the second elastic arm 014 close to the base 011. One end of the stop arm 016 is connected to the base 011. The other end is located on a side of the limit plate 017 away from the base 011.

[0052] In this embodiment, through the above arrangement, when the first elastic arm 013 is deformed in a direction away from the base 011, it is limited by the limit plate 017, so that the maximum distance between the contact portion 121 on the first elastic arm 013 and the base 011 can be controlled. In this way, the structural reliability of the conductive spring 001 can be controlled, and it is convenient to connect with the circuit contact.

[0053] See also Figure 1 In one embodiment, there are two blocking arms 016 . The two blocking arms 016 are symmetrically distributed along the extension direction of the first elastic arm 013 .

[0054] In this embodiment, by providing two blocking arms 016, on the one hand, the reliability of the conductive spring 001 limiting the first elastic arm 013 can be improved, and on the other hand, the force on the limiting plate 017 can be symmetrical, thereby improving its force state.

[0055] See also Figure 1 In one embodiment, the blocking arm 016 is L-shaped, one end of which is vertically connected to the base 011 and the other end of which is parallel to the limiting plate 017.

[0056] In this embodiment, through the above-mentioned arrangement, on the one hand, the structure of the barrier arm 016 is simplified, thereby controlling the manufacturing cost of the conductive spring piece 001; on the other hand, the barrier arm 016 and the base 011 can be formed by bending the same metal sheet, thereby reducing the difficulty of forming the conductive spring piece 001 and improving the forming efficiency of the conductive spring piece 001.

[0057] See also Figure 5 , Figure 5 yes Figure 3In one embodiment, the plane where the angle between the first elastic arm 013 and the base 011 lies is the first plane. In a direction perpendicular to the first plane, the limit plate 017 has a first width dimension, and the end of the second elastic arm 014 connected to the limit plate 017 has a second width dimension. The first width dimension is greater than the second width dimension.

[0058] In this embodiment, through the above-mentioned setting, on the one hand, the material usage of the second elastic arm 014 can be controlled, so that the material cost of the conductive spring piece 001 can be known; on the other hand, the matching size between the limit plate 017 and the blocking arm 016 can be increased, thereby improving the reliability of the blocking arm 016 limiting the limit plate 017.

[0059] See also Figure 2 In one embodiment, the first bending portion 012 includes a first corner portion 122, a vertical portion 123, and a second corner portion 124 connected in sequence. One end of the first corner portion 122 away from the vertical portion 123 is connected to the base 011. One end of the second corner away from the vertical portion 123 is connected to the first elastic arm 013. The vertical portion 123 is perpendicular to the base 011.

[0060] Furthermore, the first bending portion 012 further includes a horizontal portion 125 , and two ends of the horizontal portion 125 are respectively connected to the second corner portion 124 and the first elastic arm 013 .

[0061] In this embodiment, through the above arrangement, the first bending portion 012 can achieve a smooth connection between the base 011 and the first elastic arm 013, and the size of the first bending portion 012 in the first direction can be smaller, thereby controlling the size of the conductive spring 001.

[0062] The base 011 includes a first end connected to the first bending portion 012 and a second end away from the first end. The first direction is the direction from the first end to the second end.

[0063] See also Figure 1 In one embodiment, the conductive spring 001 is applied to a PCBA. A PCB soldering foot 018 is provided on a side of the base 011 away from the first elastic arm 013. The PCB soldering foot 018 is configured to be electrically connected to a circuit of the PCBA.

[0064] Among them, PCBA (Printed Circuit Board Assembly) is an assembly of electronic components on PCB (Printed Circuit Board). PCB (Printed Circuit Board) is a basic component used to support and connect electronic components in electronic devices.

[0065] In this embodiment, through the above configuration, when the conductive spring 001 is installed on the PCB, the operability of connecting the conductive spring 001 with the PCB can be improved.

[0066] In one embodiment, the conductive spring piece 001 is a bent piece.

[0067] In this embodiment, through the above arrangement, the conductive spring sheet 001 can be formed by bending a metal plate without requiring additional components, thereby simplifying the structure of the conductive spring sheet 001 and reducing costs.

[0068] See also Figure 6 , Figure 6 It is a top view provided by an embodiment of the present application. In one embodiment, the first elastic arm 013 includes a first section 131 and a second section 132 connected in sequence, the end of the first section 131 away from the second section 132 is connected to the first bending portion 012, and the end of the second section 132 away from the first section 131 is connected to the second elastic arm 014. The plane where the angle between the first elastic arm 013 and the base 011 is located is the first plane. In the direction perpendicular to the first plane, the first section 131 has a third width dimension, the first bending portion 012 has a fourth width dimension, and the second section 132 has a fifth width dimension. Along the direction away from the first bending portion 012, the third width dimension gradually decreases. The maximum value of the third width dimension is consistent with the fourth width dimension, and the minimum value of the third width dimension is consistent with the fifth width dimension. In this way, the size of the contact portion 121 of the conductive spring 001 can be made smaller, thereby avoiding interference between the contact portion 121 and other components on the circuit, and the remaining parts of the conductive spring 001 can be made larger, thereby improving the overall strength of the conductive spring 001. In this way, the conductive spring 001 can have a higher elastic modulus and can produce a larger elastic deformation when subjected to force, thereby absorbing energy and reducing impact.

[0069] The conductive spring 001 provided in the embodiment of the present application can be used in many scenarios, for example, in the lead screw logic control system of the automobile LCU (Line Control Unit), specifically, in the electric power steering system, the seat adjustment system, and the sunroof opening mechanism.

[0070] In addition, the material of the conductive spring 001 can be C17200 beryllium copper or phosphor bronze. C17200 beryllium copper is optional, so that the conductive spring 001 has a higher elastic modulus, higher fatigue resistance and good corrosion resistance. In addition, in order to improve the reliability of the system using the conductive spring 001, the plastic deformation size of the conductive spring 001 when it is triggered 500,000 times does not exceed 5%.

[0071] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A conductive spring, characterized in that: include: Pedestal; A first bending portion, one end of which is connected to one end of the base; A first elastic arm is arranged at an angle with the base, and one end of the elastic arm is connected to the other end of the first bending portion; The second elastic arm is located between the base and the first elastic arm, one end of the second elastic arm is connected to the first elastic arm, and the other end of the second elastic arm is extended toward the base and spaced apart from the base.

2. The conductive spring sheet according to claim 1, characterized in that: One end of the second elastic arm is connected to an end of the first elastic arm away from the first bending portion.

3. The conductive spring sheet according to claim 2, characterized in that: The conductive spring sheet also includes a second bending portion, which is arranged between the first elastic arm and the second elastic arm, with two ends of the second bending portion respectively connected to the first elastic arm and the second elastic arm, and an inner concave surface of the second bending portion faces the base.

4. The conductive spring sheet according to claim 2, characterized in that: An included angle α is formed between the second elastic arm and the first elastic arm, satisfying: 10°≤α≤80°.

5. The conductive spring sheet according to any one of claims 1 to 4, characterized in that: The conductive spring sheet also includes a stop arm, a limit plate is arranged at one end of the second elastic arm close to the base, one end of the stop arm is connected to the base, and the other end is located at a side of the limit plate away from the base.

6. The conductive spring sheet according to claim 5, characterized in that: There are two blocking arms, and the two blocking arms are symmetrically distributed along the extending direction of the first elastic arm.

7. The conductive spring sheet according to claim 5, characterized in that: The blocking arm is L-shaped, one end of which is vertically connected to the base, and the other end of which is parallel to the limiting plate.

8. The conductive spring sheet according to claim 5, characterized in that: The plane where the angle between the first elastic arm and the base lies is the first plane. In a direction perpendicular to the first plane, the limiting plate has a first width dimension, and the end of the second elastic arm connected to the limiting plate has a second width dimension, and the first width dimension is greater than the second width dimension.

9. The conductive spring sheet according to any one of claims 1 to 4, characterized in that: The first bending portion includes a first corner portion, a vertical portion and a second corner portion connected in sequence, the end of the first corner portion away from the vertical portion is connected to the base, the end of the second corner portion away from the vertical portion is connected to the first elastic arm, and the vertical portion is perpendicular to the base.

10. The conductive spring sheet according to any one of claims 1 to 4, characterized in that: The conductive spring is applied to PCBA, and a PCB soldering foot is provided on a side of the base away from the first elastic arm, and the PCB soldering foot is configured to be electrically connected to the circuit of the PCBA.

11. The conductive spring sheet according to any one of claims 1 to 4, characterized in that: The conductive spring sheet is a bent piece.

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