A conductive terminal with an open-circuit protection structure

Abstract

The present invention discloses a conductive terminal with a circuit-breaking protection structure, which includes a base, a wire-pressing terminal, a split terminal, a conductive metal piece and an arm. The wire-pressing terminal and the split terminal are both arranged on the base; the conductive metal piece is electrically connected to the wire-pressing terminal and the split terminal respectively to electrically connect the wire-pressing terminal and the split terminal. The conductive metal piece includes an abutting portion, and the first side of the abutting portion abuts against the cantilever on the base; the arm is rotatably installed on the base through a rotating shaft. The first end of the arm is connected to the base through an elastic member, and the second end of the arm abuts against the second side of the abutting portion. The present invention can automatically disconnect the circuit connection when the temperature inside the conductive terminal is too high, avoid burning out the conductive terminal due to temperature rise, and protect the safety of the circuit.

Description

Technical Field

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

[0002] In communication devices or electronic and electrical devices, conductive terminals play a role as a bridge for internal and external connections. Conductive terminals often need to achieve circuit plugging and unplugging connections, and most of the on-site conductive terminals are manually plugged and unplugged structures. The problem is that there is a phenomenon of burning at the connection position, which cannot be detected in time, resulting in circuit burning. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a conductive terminal with a circuit break protection structure, which can automatically disconnect the circuit connection when the temperature inside the conductive terminal is too high, avoid burning the conductive terminal due to temperature rise, and protect the safety of the circuit.

[0004] The present invention is realized through the following technical solutions:

[0005] A conductive terminal with a circuit break protection structure includes:

[0006] A base;

[0007] A wire pressing terminal, which is arranged on the base and used for connecting a cable;

[0008] A split terminal, which is arranged on the base and used for connecting a mating end;

[0009] A conductive metal piece, which is electrically connected to the wire pressing terminal and the split terminal respectively to electrically connect the wire pressing terminal and the split terminal. The conductive metal piece includes a contact portion, and the first side of the contact portion abuts against a cantilever on the base;

[0010] An arm, which is rotatably mounted on the base through a rotating shaft. The first end of the arm is connected to the base through an elastic member, and the second end of the arm abuts against the second side of the contact portion;

[0011] Wherein, the elastic member is in a stretched state. When the conductive terminal works abnormally and the internal temperature rises, the temperature of the conductive metal piece rises. The elastic member drives the arm to rotate, the arm drives the conductive metal piece to move away from the split terminal, and at the same time, the conductive metal piece deforms and disengages from the abutment with the cantilever, and a separation occurs between the conductive metal piece and the split terminal to cut off the energized circuit.

[0012] Further, a mating hole is formed in the contact portion, and the other end of the arm passes through the mating hole.

[0013] Further, the abutting portion includes a connecting portion, and the mating hole is formed on the connecting portion.

[0014] Further, the abutting portion further includes a contact portion connected to the connecting portion. The contact portion is semicircular, and the arc segment of the contact portion abuts against the cantilever. The suspended end of the contact portion abuts against the upper surface of the support arm.

[0015] Further, a slope is formed on the cantilever, and the slope abuts against the arc segment of the contact portion.

[0016] Further, the conductive metal piece is sheet-shaped.

[0017] Further, the conductive metal piece includes a first metal layer and a second metal layer with a laminated design. The first metal layer is disposed in contact with the wire pressing terminal. The second metal layer is located outside the first metal layer, and the coefficient of thermal expansion of the second metal layer is smaller than that of the first metal layer. And the abutting portion is formed by extending and folding the end of the second metal layer.

[0018] Further, 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 is operating normally, the elastic member is in a stretched state.

[0019] Further, a relief groove is formed by concave-convex in the base. When the conductive terminal malfunctions and the internal temperature rises, at least a part of the abutting portion is received in the relief groove.

[0020] Further, the cantilever is integrally formed on the bottom wall of the relief groove.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] The elastic member drives the support arm to rotate. The support arm drives the conductive metal piece to move away from the split terminal. At the same time, the conductive metal piece deforms and disengages from the abutment with the cantilever. At this time, the cantilever loses the limit on the abutting portion, and further the abutting portion loses the downward pressure on the right side of the support arm. The left side of the support arm rotates counterclockwise around the rotation axis under the elastic force of the elastic member, causing the left side of the support arm to lower and the right side to rise, so that the conductive metal piece is separated from the split terminal, thereby forming an immediate cut-off of the energized circuit, achieving open-circuit protection, avoiding burning out the conductive terminal due to temperature rise, protecting the circuit safety. Secondly, compared with a fuse and an electronic temperature control protection system, the mechanical open-circuit protection structure is not affected by electromagnetic interference, improving the reliability of the open-circuit protection function; and the conductive metal piece is replaceable, and can be used in cooperation with other components after replacement, reducing the replacement cost; the simple installation method is convenient for later maintenance and reduces the labor intensity. Description of the Drawings

[0023] Figure 1 Schematic diagram of the structure of the conductive terminal

[0024] Figure 2 Schematic diagram of the structure of the conductive terminal in the normal working state

[0025] Figure 3 Schematic diagram of the structure of the conductive terminal in the abnormal working state

[0026] 1. Base; 10. Cantilever; 100. Inclined plane; 11. Avoidance groove; 2. Pressing terminal; 3. Split terminal; 4. Conductive metal part; 40. Contact part; 400. Connection part; 401. Fitting 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 Specific embodiments

[0027] The technical solution of the invention will be further described in detail and non - restrictively below in conjunction with the preferred embodiments and their accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention

[0028] As Figures 1 - 3 shown, a conductive terminal with a circuit - breaking protection structure according to an embodiment of the present invention includes a base 1, a pressing terminal 2, a split terminal 3, a conductive metal part 4, and a support arm 5. The pressing terminal 2 is arranged on the base 1 for connecting a cable, the split terminal 3 is arranged on the base 1 for connecting an insertion end, the conductive metal part 4 is electrically connected to the pressing terminal 2 and the split terminal 3 respectively to electrically connect the pressing terminal 2 and the split terminal 3. The conductive metal part 4 includes a contact part 40, the first side of the contact part 40 abuts against the cantilever 10 on the base 1, the support arm 5 is rotatably mounted on the base 1 through a rotating shaft 50, the first end of the support arm 5 is connected to the base 1 through an elastic part 6, and the second end of the support arm 5 abuts against the second side of the contact part 40. Refer to Figure 2, when the conductive terminal is working normally, the elastic member 6 is in a stretched state. The left side of the support arm 5 is subjected to the elastic tension of the elastic member 6, and at the same time, the right side of the support arm 5 is subjected to the downward pressure of the abutting portion 40. At this time, the support arm 5 is in a left-right balanced state, and the current sequentially passes through the wire pressing terminal 2, the conductive metal member 4, and the split terminal 3 to achieve current transmission; reference Figure 3 , when the conductive terminal malfunctions 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 away from the split terminal 3. At the same time, the conductive metal member 4 deforms and disengages from the abutment with the cantilever 10. A separation is formed between the conductive metal member 4 and the split terminal 3, and the energized circuit is cut off. In the present invention, the elastic member 6 drives the support arm 5 to rotate, and the support arm 5 drives the conductive metal member 4 to move away from the split terminal 3. At the same time, the conductive metal member 4 deforms and disengages from the abutment with the cantilever 10. At this time, the cantilever 10 loses the limit on the abutting portion 40, and further the abutting 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 rotation shaft 50 under the elastic force of the elastic member 6, causing the left side of the support arm 5 to lower and the right side to rise, so that a separation is formed between the conductive metal member 4 and the split terminal 3, thereby achieving timely cutting of the energized circuit, realizing open circuit protection, avoiding burning out the conductive terminal due to temperature rise, protecting the circuit safety. Secondly, compared with fuses and electronic temperature control protection systems, the mechanical open circuit protection structure is not affected by electromagnetic interference, improving the reliability of the open circuit protection function; and the conductive metal member 4 is replaceable, and after replacement, it can continue to be used in cooperation with other components, reducing the replacement cost; the simple installation method is convenient for later maintenance and reduces the labor intensity.

[0029] In this embodiment, the conductive metal part 4 is sheet-shaped and located on the same side of the wire-pressing terminal 2 and the split terminal 3. One end of the conductive metal part 4 is attached to the wire-pressing terminal 2, and the other end is attached to the split terminal 3. Specifically, the conductive metal part 4 is a bimetal sheet, also known as a thermally conductive metal part, mainly utilizing the thermosensitive bending characteristic of the bimetal sheet. Specifically, the conductive metal part 4 includes a first metal layer 41 and a second metal layer 42 which are designed in a laminated manner. The first metal layer 41 is attached to the wire-pressing terminal 2. The second metal layer 42 is located outside the first metal layer 41, and the coefficient of thermal expansion of the second metal layer 42 is smaller than that of the first metal layer 41. The abutting 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 amount of the first metal layer 41 is greater than that of the second metal layer 42. Thus, the entire conductive metal part 4 bends towards the side of the second metal layer 42. During the bending process of the conductive metal part 4, the abutting portion 40 is driven to move. When the abutting portion 40 moves to disengage from the abutment with the cantilever 10, at this time, the cantilever 10 loses the limitation on the abutting portion 40. Furthermore, the downward pressure of the abutting portion 40 on the right side of the support arm 5 is lost. The left side of the support arm 5 rotates counterclockwise around the rotating shaft 50 under the elastic force of the elastic member 6, causing the left side of the support arm 5 to lower and the right side to rise, separating the conductive metal part 4 from the split terminal 3, thereby timely cutting off the energized circuit and realizing open-circuit protection.

[0030] As Figure 1 shown, a relief groove 11 is concavely formed in the base 1. When the conductive terminal malfunctions and the internal temperature rises, at least a part of the abutting portion 40 is received in the relief groove 11, avoiding the interference of the base 1 on the heat-bent conductive metal part 4, thus affecting the timely cutting off of the circuit. In this embodiment, the cantilever 10 is integrally formed on the bottom wall of the relief groove 11.

[0031] As Figure 1 shown, a mating hole 401 is formed in the abutting portion 40. The other end of the support arm 5 passes through the mating hole 401. By forming the mating hole 401, not only is the assembly or disassembly of the abutting portion 40 and the support arm 5 facilitated, which is convenient for replacing the conductive metal part 4 later, but also the weight of the entire conductive metal part 4 can be reduced by forming the mating hole 401, thereby reducing the weight of the entire conductive terminal.

[0032] As Figure 2 shown, the abutting portion 40 is integrally formed and includes a connecting portion 400 and a contact portion 410 connected to the connecting portion 400. The mating hole 401 is formed in the connecting portion 400. The contact portion 410 is semi-circular, and the arc segment 411 of the contact portion 410 abuts against the cantilever 10. The free end 412 of the contact portion 410 abuts against the upper surface of the support arm 5.

[0033] In order to avoid the contact portion 40 being difficult to disengage from the cantilever 10, in this embodiment, an inclined surface 100 is formed on the cantilever 10. The inclined surface is arranged facing the contact portion 410, and the inclined surface 100 abuts against the arc segment 411 of the contact portion 410.

[0034] The rotating shaft 50 is integrally formed on the support arm 5 or the base 1, and a rotating hole mating with the rotating shaft 50 is provided on the base 1 or the support arm 5.

[0035] 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.

[0036] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A conductive terminal with a circuit-breaking protection structure, characterized in that, Comprising: Base (1); Wire-pressing terminal (2), which is arranged on the base (1) and used for connecting a cable; Split terminal (3), which is arranged on the base (1) and used for connecting a mating end; Conductive metal part (4), which is electrically connected to the wire-pressing terminal (2) and the split terminal (3) respectively to electrically connect the wire-pressing terminal (2) and the split terminal (3), and the conductive metal part (4) includes a contact part (40); Support arm (5), which is rotatably installed on the base (1) through a rotating shaft (50), and the first end of the support arm (5) is connected to the base (1) through an elastic part (6); A mating hole (401) is formed on the contact part (40), and the other end of the support arm (5) passes through the mating hole (401); The contact part (40) includes a connecting part (400), and the mating hole (401) is formed on the connecting part (400); The contact part (40) further includes a contact portion (410) connected to the connecting part (400), the contact portion (410) is semicircular, and the arc segment (411) of the contact portion (410) abuts against the cantilever (10) on the base (1), and the free end (412) of the contact portion (410) abuts against the upper surface of the support arm (5); Wherein, the elastic part (6) is in a stretched state. When the conductive terminal works abnormally and the internal temperature rises, the temperature of the conductive metal part (4) rises and bends towards one side. During the bending process of the conductive metal part (4), the contact part (40) is driven to move. When the contact part (40) moves to be disengaged from the abutment with the cantilever (10), the elastic part (6) drives the support arm (5) to rotate, the support arm (5) drives the conductive metal part (4) to move away from the split terminal (3), and the conductive metal part (4) is separated from the split terminal (3) to cut off the energized circuit.

2. The conductive terminal with a circuit-breaking protection structure according to claim 1, wherein, 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).

3. The conductive terminal with a circuit-breaking protection structure according to claim 1, wherein, The conductive metal part is in a sheet shape.

4. A conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that, The conductive metal part (4) includes a first metal layer (41) and a second metal layer (42) with a laminated design. The first metal layer (41) is arranged in contact with the wire-pressing terminal (2). The second metal layer (42) is located outside the first metal layer (41), and the coefficient of thermal expansion of the second metal layer (42) is smaller than that of the first metal layer (41), and the contact part (40) is formed by extending and folding the end of the second metal layer (42).

5. A conductive terminal with a circuit breaker protection structure according to claim 1, characterized in that, One end of the elastic part (6) is welded to the support arm (5), and the other end is welded to the wire-pressing terminal (2). When the conductive terminal works normally, the elastic part (6) is in a stretched state.

6. The conductive terminal with a circuit break protection structure according to claim 1, characterized in that, The base (1) is recessed to form an avoidance groove (11). When the conductive terminal malfunctions and the internal temperature rises, at least a part of the abutting portion (40) is received in the avoidance groove (11).

7. The conductive terminal with a circuit-breaking protection structure according to claim 6, characterized in that, The cantilever (10) is integrally formed on the bottom wall of the avoidance groove (11).

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