Conductive terminal with open circuit protection structure

Abstract

The invention discloses a conductive terminal with an open circuit protection structure, which comprises a base, a wire pressing terminal, a split terminal, a conductive metal piece and a support arm, and is characterized in that the wire pressing terminal and the split terminal are arranged on the base; the conductive metal piece is electrically connected with the wire pressing terminal and the split terminal so as to electrically connect the wire pressing terminal and the split terminal, the conductive metal piece comprises an abutting part, and the first side of the abutting part abuts against the cantilever on the base; the supporting arm is rotatably installed on the base through a rotating shaft, the first end of the supporting arm is connected with the base through an elastic piece, and the second end of the supporting arm abuts against the second side of the abutting part. Circuit connection can be automatically disconnected when the internal temperature of the conductive terminal is too high, the conductive terminal is prevented from being burnt out due to temperature rise, and circuit safety is protected.

Description

Technical Field

[0001] The invention relates to the technical field of conductive terminals, and in particular to a conductive terminal with a circuit breaker protection structure. Background Art

[0002] In communication equipment or electronic and electrical equipment, conductive terminals play the role of a bridge between the inside and the outside. Conductive terminals often need to be connected to the circuit by plugging and unplugging. Most of the conductive terminals on site are manually plugged and unplugged. The problem is that the connection position is burned and cannot be discovered in time, resulting in circuit burnout. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a conductive terminal with a circuit breaker protection structure, which can automatically disconnect the circuit when the internal temperature of the conductive terminal is too high, thereby preventing the conductive terminal from being burned due to temperature rise and protecting the circuit safety.

[0004] The present invention is achieved through the following technical solutions: A conductive terminal with a circuit breaker protection structure, comprising: Pedestal; A wire pressing terminal, which is arranged on the base and is used to connect a cable; A split terminal, the split terminal is arranged on the base and is used to connect the plug end; A conductive metal member, the conductive metal member is electrically connected to the crimping terminal and the split terminal respectively to electrically connect the crimping terminal and the split terminal, the conductive metal member comprises an abutting portion, a first side of the abutting portion abuts against the cantilever on the base; A support arm, wherein the support arm is rotatably mounted on the base via a rotating shaft, a first end of the support arm is connected to the base via an elastic member, and a second end of the support arm abuts against a second side of the abutting portion; Among them, the elastic part is in a stretched state. When the conductive terminal works abnormally and the internal temperature rises, the temperature of the conductive metal part rises, the elastic part drives the support arm to rotate, and the support arm drives the conductive metal part to move in a direction away from the split terminal. At the same time, the conductive metal part is deformed and disengaged from the cantilever, and the conductive metal part is separated from the split terminal and the power circuit is cut off.

[0005] Furthermore, a matching hole is provided on the abutting portion, and the other end of the supporting arm passes through the matching hole.

[0006] Furthermore, the abutting portion includes a connecting portion, and the matching hole is formed on the connecting portion.

[0007] Furthermore, the abutting portion also includes a contact portion connected to the connecting portion, the contact portion is semicircular and an arc segment of the contact portion abuts against the cantilever, and a suspended end of the contact portion abuts against an upper surface of the support arm.

[0008] Furthermore, an inclined surface is formed on the cantilever, and the inclined surface abuts against the arc segment of the contact portion.

[0009] Furthermore, the conductive metal piece is in sheet shape.

[0010] Furthermore, the conductive metal part includes a first metal layer and a second metal layer in a stacked design, the first metal layer is arranged in contact with the wire crimping terminal, the second metal layer is located outside the first metal layer and the thermal expansion coefficient of the second metal layer is smaller than the thermal expansion coefficient of the first metal layer, and the abutment portion is formed by extending and folding the end of the second metal layer.

[0011] Furthermore, one end of the elastic member is welded to the support arm, and the other end is welded to the wire pressing terminal. When the conductive terminal works normally, the elastic member is in a stretched state.

[0012] Furthermore, the base is concavely formed with an escape groove, and when the conductive terminal works abnormally so that the internal temperature rises, the abutment portion is at least partially accommodated in the escape groove.

[0013] Furthermore, the cantilever is integrally formed on the bottom wall of the avoidance groove.

[0014] Compared with the prior art, the advantages of the present invention are: The elastic member drives the support arm to rotate, and the support arm drives the conductive metal member to move in the direction away from the split terminal. At the same time, the conductive metal member is deformed and disengaged from the cantilever. At this time, the cantilever loses the limit on the abutment part, and the abutment part loses the downward pressure on the right side of the support arm. The left side of the support arm rotates counterclockwise around the rotating axis under the elastic force of the elastic member, so that the left side of the support arm is lowered and the right side is raised, so that the conductive metal member is separated from the split terminal, thereby forming a timely cut-off of the power circuit and realizing circuit breaking protection, avoiding temperature increase and burning the conductive terminal, and protecting the circuit safety. Secondly, compared with fuses and electronic temperature control protection systems, the mechanical circuit breaking protection structure is not affected by electromagnetic interference, thereby improving the reliability of the circuit breaking protection function; and the conductive metal member is replaceable, and can continue to be used in conjunction with other components after replacement, reducing replacement costs; the simple installation method facilitates later maintenance and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the structure of the conductive terminal; Figure 2 It is a schematic diagram of the structure of the conductive terminal under normal working conditions; Figure 3 It is a structural schematic diagram of the conductive terminal in an abnormal working state.

[0016] 1. Base; 10. Cantilever; 100. Inclined surface; 11. Avoidance groove; 2. Wire crimping terminal; 3. Split terminal; 4. Conductive metal part; 40. Abutment part; 400. Connecting part; 401. Matching hole; 410. Contact part; 411. Arc segment; 412. Suspended end; 41. First metal layer; 42. Second metal layer; 5. Support arm; 50. Rotating shaft; 6. Elastic part. DETAILED DESCRIPTION

[0017] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention. like Figure 1-Figure 3 As shown, a conductive terminal with a circuit breaker protection structure according to an embodiment of the present invention comprises a base 1, a crimping terminal 2, a split terminal 3, a conductive metal member 4 and a support arm 5. The crimping terminal 2 is arranged on the base 1 for connecting the cable, and the split terminal 3 is arranged on the base 1 for connecting the plug-in end. The conductive metal member 4 is electrically connected to the crimping terminal 2 and the split terminal 3 respectively to electrically connect the crimping terminal 2 and the split terminal 3. The conductive metal member 4 comprises an abutting portion 40, and a first side of the abutting portion 40 abuts against a cantilever 10 on the base 1. The support arm 5 is rotatably mounted on the base 1 via a rotating shaft 50. The first end of the support arm 5 is connected to the base 1 via an elastic member 6, and the second end of the support arm 5 abuts against a second side of the abutting portion 40. Reference Figure 2 When the conductive terminal works normally, the elastic member 6 is in a stretched state, the left side of the arm 5 is subjected to the elastic tension of the elastic member 6, and the right side of the arm 5 is subjected to the downward pressure of the abutment portion 40. At this time, the arm 5 is in a left-right balanced state, and the current passes through the crimping terminal 2, the conductive metal member 4 and the split terminal 3 in sequence to realize the transmission of the current; refer to Figure 3 When the conductive terminal works abnormally and the internal temperature rises, the temperature of the conductive metal part 4 rises, the elastic part 6 drives the support arm 5 to rotate, and the support arm 5 drives the conductive metal part 4 to move in a direction away from the split terminal 3. At the same time, the conductive metal part 4 is deformed and disengaged from the cantilever 10, and the conductive metal part 4 is separated from the split terminal 3 and the power circuit is cut off. The elastic force of the elastic member 6 drives the support arm 5 to rotate, and the support arm 5 drives the conductive metal member 4 to move in the direction away from the split terminal 3. At the same time, the conductive metal member 4 is deformed and disengaged from the cantilever 10. At this time, the cantilever 10 loses the limit on the abutment portion 40, and the abutment portion 40 loses the downward pressure on the right side of the support arm 5. The left side of the support arm 5 rotates counterclockwise around the rotating shaft 50 under the elastic force of the elastic member 6, so that the left side of the support arm 5 is lowered and the right side is raised, so that the conductive metal member 4 is separated from the split terminal 3, thereby forming a timely cutoff of the power circuit, realizing circuit breaking protection, avoiding temperature increase and burning the conductive terminal, and protecting the circuit safety. Secondly, compared with fuses and electronic temperature control protection systems, the mechanical circuit breaking protection structure is not affected by electromagnetic interference, thereby improving the reliability of the circuit breaking protection function; and the conductive metal member 4 is replaceable, and can continue to be used in conjunction with other components after replacement, reducing the replacement cost; the simple installation method is convenient for later maintenance and reduces labor intensity.

[0018] In this embodiment, the conductive metal part 4 is in the shape of a sheet and is located on the same side of the crimping terminal 2 and the split terminal 3, and one end of the conductive metal part 4 is attached to the crimping terminal 2 and the other end is attached to the split terminal 3. Specifically, the conductive metal part 4 adopts a bimetallic strip, also known as a thermally conductive metal part, which mainly utilizes the thermal-sensitive bending characteristics of the bimetallic strip. Specifically, the conductive metal part 4 includes a first metal layer 41 and a second metal layer 42 of a stacked design. The first metal layer 41 is attached to the crimping terminal 2, the second metal layer 42 is located on the outside of the first metal layer 41 and the thermal expansion coefficient of the second metal layer 42 is smaller than the thermal expansion coefficient of the first metal layer 41, and the abutment portion 40 is formed by extending and folding the end of the second metal layer 42. When the temperature of the conductive metal part 4 rises, the deformation of the first metal layer 41 is greater than the deformation of the second metal layer 42, so that the entire conductive metal part 4 bends toward one side of the second metal layer 42. The conductive metal part 4 bends and drives the abutment part 40 to move. When the abutment part 40 moves to break away from the abutment with the cantilever 10, the cantilever 10 loses the limiting position of the abutment part 40, and the abutment part 40 loses the downward pressure on the right side of the support arm 5. The left side of the support arm 5 rotates counterclockwise around the rotating shaft 50 in cooperation with the elastic force of the elastic part 6, so that the left side of the support arm 5 is lowered and the right side is raised, so that the conductive metal part 4 is separated from the split terminal 3, thereby forming a timely cutoff of the power circuit to achieve circuit breaking protection.

[0019] like Figure 1As shown, the base 1 is concavely formed with an escape groove 11. When the conductive terminal works abnormally and the internal temperature rises, the abutment portion 40 is at least partially accommodated in the escape groove 11 to prevent the base 1 from interfering with the conductive metal part 4 that is bent by heat, thereby affecting the immediate disconnection of the circuit. In this embodiment, the cantilever 10 is integrally formed on the bottom wall of the escape groove 11.

[0020] like Figure 1 As shown, a mating hole 401 is provided on the abutting portion 40, and the other end of the support arm 5 passes through the mating hole 401. The provision of the mating hole 401 not only facilitates the assembly or disassembly of the abutting portion 40 and the support arm 5, but also facilitates the later replacement of the conductive metal part 4. At the same time, the provision of the mating hole 401 can reduce the weight of the entire conductive metal part 4, thereby reducing the weight of the entire conductive terminal.

[0021] like Figure 2 As shown, the abutment portion 40 is integrally formed and includes a connecting portion 400 and a contact portion 410 connected to the connecting portion 400, a matching hole 401 is formed on the connecting portion 400, the contact portion 410 is semicircular and an arc segment 411 of the contact portion 410 abuts against the cantilever 10, and a suspended end 412 of the contact portion 410 abuts against the upper surface of the support arm 5.

[0022] In order to prevent the abutting portion 40 from being difficult to detach from the cantilever 10 , in this embodiment, an inclined surface 100 is formed on the cantilever 10 , which is arranged toward the contact portion 410 , and the inclined surface 100 abuts against the arc segment 411 of the contact portion 410 .

[0023] The rotating shaft 50 is integrally formed on the support arm 5 or the base 1 , and a rotating hole matched with the rotating shaft 50 is formed on the base 1 or the support arm 5 .

[0024] One end of the elastic member 6 is welded to the support arm 5 , and the other end is welded to the crimping terminal 2 . When the conductive terminal works normally, the elastic member 6 is in a stretched state.

[0025] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A conductive terminal with a circuit breaker protection structure, characterized in that: include: Base (1); A wire pressing terminal (2), the wire pressing terminal (2) being arranged on the base (1) and used for connecting a cable; A split terminal (3), the split terminal (3) being arranged on the base (1) and used for connecting to a plug-in end; a conductive metal member (4), the conductive metal member (4) being electrically connected to the crimping terminal (2) and the split terminal (3) respectively so as to electrically connect the crimping terminal (2) and the split terminal (3), the conductive metal member (4) comprising an abutting portion (40), a first side of the abutting portion (40) being in abutment with the cantilever (10) on the base (1); A support arm (5), the support arm (5) being rotatably mounted on the base (1) via a rotating shaft (50), a first end of the support arm (5) being connected to the base (1) via an elastic member (6), and a second end of the support arm (5) being in abutment with a second side of the abutment portion (40); The elastic member (6) is in a stretched state. When the conductive terminal works abnormally and the internal temperature rises, the temperature of the conductive metal member (4) rises, the elastic member (6) drives the support arm (5) to rotate, and the support arm (5) drives the conductive metal member (4) to move in a direction away from the split terminal (3). At the same time, the conductive metal member (4) is deformed and disengaged from the cantilever (10), and the conductive metal member (4) and the split terminal (3) are separated and the power circuit is cut off.

2. A conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that: The abutment portion (40) is provided with a matching hole (401), and the other end of the support arm (5) passes through the matching hole (401).

3. A conductive terminal with a circuit breaker protection structure according to claim 2, characterized in that: The abutting portion (40) comprises a connecting portion (400), and the matching hole (401) is formed on the connecting portion (400).

4. A conductive terminal with a circuit breaker protection structure according to claim 3, characterized in that: The abutting portion (40) further comprises a contact portion (410) connected to the connecting portion (400), the contact portion (410) being semicircular and the arc segment (411) of the contact portion (410) abutting against the cantilever (10), and the suspended end (412) of the contact portion (410) abutting against the upper surface of the support arm (5).

5. A conductive terminal with a circuit breaker protection structure according to claim 4, characterized in that: An inclined surface (100) is formed on the cantilever (10), and the inclined surface (100) abuts against the arc segment (411) of the contact portion (410).

6. The conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that: The conductive metal piece is in sheet shape.

7. The conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that: The conductive metal part (4) comprises a first metal layer (41) and a second metal layer (42) of a stacked design, wherein the first metal layer (41) is arranged in contact with the wire crimping terminal (2), the second metal layer (42) is located outside the first metal layer (41) and the thermal expansion coefficient of the second metal layer (42) is smaller than the thermal expansion coefficient of the first metal layer (41), and the abutment portion (40) is formed by extending and folding the end of the second metal layer (42).

8. The conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that: One end of the elastic member (6) is welded to the support arm (5), and the other end is welded to the wire pressing terminal (2); when the conductive terminal is working normally, the elastic member (6) is in a stretched state.

9. The conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that: The base (1) is concavely formed with an escape groove (11); when the conductive terminal works abnormally and the internal temperature rises, the abutment portion (40) is at least partially accommodated in the escape groove (11).

10. A conductive terminal with a circuit breaker protection structure according to claim 9, characterized in that: The cantilever (10) is integrally formed on the bottom wall of the avoidance groove (11).

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