A hot-melt body with no shell electrification

Abstract

The utility model provides a kind of outer shell uncharged hot fuse, including outer shell, is equipped with insulating pin fixed seat, insulating communication sheet fixed seat, first pin wire, second pin wire, conductive communication sheet, first spring and temperature-sensitive deformation body in the outer shell.In the utility model application, first pin wire, second pin wire and conductive communication sheet form U-shaped conductive path, realize same side U-shaped conduction;First pin wire, second pin wire are fixed in insulating pin fixed seat, isolate and contact with outer shell, ensure that it is insulated with outer shell, conductive communication sheet is set on insulating communication sheet fixed seat, ensure that it is insulated with outer shell, outer shell and internal conductive component are completely insulated, ensure that outer shell is not electrified in normal conduction state and fuse state, improve safety.

Description

Technical Field

[0001] This utility model relates to a thermal fuse, specifically a thermal fuse with a non-electrically charged outer casing. Background Technology

[0002] A thermal fuse, also known as a thermal circuit breaker, is a one-time over-temperature protection device. It is usually installed on the heating components of electrical and electronic devices. It can sense overheating caused by abnormal operation of the product and cut off the circuit to prevent fire. It is widely used in the thermal protection of similar components in home appliances, automobiles, and smart bathrooms. When the internal current of the product is overloaded, the circuit is abnormal, or the ambient temperature rises to a certain temperature, the thermal fuse can achieve over-temperature melting through its own structure, which can automatically interrupt the current and prevent damage or fire caused by excessive temperature.

[0003] Existing thermal fuses typically have an electrically charged outer casing, requiring an insulating sleeve during use. This increases installation difficulty, reduces heat conduction speed, slows down the fuse's response, and consequently lowers safety.

[0004] To address the above issues, we have developed a new technical solution. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a thermal fuse with a non-electrically charged outer casing, and the technical solution adopted includes:

[0006] A non-electrically charged thermal fuse includes a housing, within which are disposed an insulating pin holder, an insulating connecting piece holder, a first pin wire, a second pin wire, a conductive connecting piece, a first spring, and a temperature-sensing deformable element. The first and second pin wires are disposed within the insulating pin holder, with one end extending inwards towards the inside of the housing and the other end passing through the insulating pin holder and extending outwards. The conductive connecting piece is disposed on the insulating connecting piece holder, with the conductive connecting piece facing the insulating pin holder. The first spring and the temperature-sensing deformable element are disposed on the side of the insulating connecting piece holder away from the conductive connecting piece. A spring is disposed between a temperature-sensing deformable body and an insulating connecting piece fixing seat. The temperature-sensing deformable body has a first state or a second state. When the temperature-sensing deformable body is in the first state, the two ends of the first spring are compressed and pressed against the insulating connecting piece fixing seat and the temperature-sensing deformable body, respectively. Under the elastic force of the first spring, the conductive connecting piece contacts the first lead wire and the second lead wire to conduct electricity. When the temperature-sensing deformable body is in the second state, the first spring cannot drive the insulating connecting piece fixing seat to drive the conductive connecting piece to contact the first lead wire and the second lead wire. The conductive connecting piece disengages from the first lead wire or the second lead wire, or the conductive connecting piece disengages from both the first lead wire and the second lead wire.

[0007] According to an embodiment of the present invention, a non-electrically charged thermal fuse has an insulating gasket disposed between the first spring and the temperature-sensing deformable part.

[0008] According to an embodiment of the present invention, a non-electrically charged thermal fuse is provided, wherein the insulating pin holder includes a base body, and two pin sleeves for passing through a first pin wire and a second pin wire are provided on the base body.

[0009] According to an embodiment of the present invention, a non-electrically charged thermal fuse includes a second spring, which elastically abuts against the base of the insulating pin fixing seat and the insulating connecting piece fixing seat.

[0010] According to an embodiment of the present invention, a non-electrically charged thermal fuse includes two second springs, which are respectively fitted onto the pin sleeves of the insulating pin fixing seat and elastically abut against the seat body and the conductive connecting piece.

[0011] According to an embodiment of the present invention, a non-electrically charged thermal fuse is provided, wherein the temperature-sensing deformable body is an organic temperature-sensing body.

[0012] According to an embodiment of the present invention, a non-electrically charged thermal fuse is provided, wherein the outer casing is a metal casing.

[0013] According to an embodiment of the present invention, a non-electrically charged thermal fuse is provided, wherein the outer shell is circular.

[0014] According to an embodiment of the present invention, a non-electrically charged thermal fuse is provided, wherein the outer shell is square.

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

[0016] In this utility model application, the first and second pins form a U-shaped conductive path with the conductive connecting piece, achieving U-shaped conductivity on the same side. The first and second pins are fixed in the insulating pin holder, isolating them from contact with the outer shell and ensuring insulation between them. The conductive connecting piece is set on the insulating connecting piece holder, ensuring insulation between it and the outer shell. The outer shell is completely insulated from the internal conductive components, ensuring that the outer shell is not energized in both normal conductive and fused states, thus improving safety. Through the cooperation of the first spring and the temperature-sensing deformer, a reliable fused function is achieved. The structure is simple and the response is rapid. The technical solution of this utility model improves conductivity stability, reduces the influence of current, temperature and other factors on the temperature-sensing deformer, is suitable for high-current applications, further enhances the precise control of the temperature-sensing deformer, and compared with traditional fused structures, the technical solution of this utility model has lower processing requirements and reduces production costs. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of Embodiment 2 of the present invention;

[0020] Figure 3 This is a structural schematic diagram of Embodiment 3 of the present invention. Figure 1 ;

[0021] Figure 4 This is a structural schematic diagram of Embodiment 3 of the present invention. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the structure of Embodiment 4 of the present invention. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the structure of Embodiment 4 of the present invention. Figure 2 .

[0024] Explanation of key component symbols:

[0025] 10. Conductive connecting piece; 20. First lead wire; 30. Second lead wire; 40. Temperature-sensitive deformation piece; 50. First spring; 60. Second spring; 70. Insulating lead fixing base; 71. Base body; 72. Lead wire sleeve; 73. Wire groove; 80. Housing; 90. Insulating connecting piece fixing base; 100. Insulating gasket. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Example

[0031] This utility model provides a thermal fuse with a non-electrical outer casing, such as... Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, the device includes a housing 80. Within the housing 80 are an insulating pin holder 70, an insulating connecting piece holder 90, a first pin wire 20, a second pin wire 30, a conductive connecting piece 10, a first spring 50, and a temperature-sensing deformable element 40. The temperature-sensing deformable element is an organic temperature-sensing element. The first pin wire 20 and the second pin wire 30 are disposed within the insulating pin holder 70, with one end extending towards the inside of the housing 80 and the other end passing through the insulating pin holder 70 and extending outside the housing 80. The conductive connecting piece 10 is disposed on the insulating connecting piece holder 90, and the conductive connecting piece 10 faces the insulating pin holder 70. The first spring 50 and the organic temperature-sensing element are disposed on the insulating connecting piece holder 90 away from the conductive connecting piece 10. On one side, the first spring 50 is disposed between the organic material temperature sensor and the insulating connecting piece fixing seat 90. The organic material temperature sensor has a first state or a second state. When the organic material temperature sensor is in the first state, the two ends of the first spring 50 are compressed and pressed against the insulating connecting piece fixing seat 90 and the organic material temperature sensor, respectively. Under the elastic force of the first spring 50, the conductive connecting piece 10 contacts the first lead wire 20 and the second lead wire 30 to conduct electricity. When the organic material temperature sensor is in the second state, the first spring 50 cannot drive the insulating connecting piece fixing seat 90 to drive the conductive connecting piece 10 to contact the first lead wire 20 and the second lead wire 30. The conductive connecting piece 10 is disengaged from the first lead wire 20 or the second lead wire 30, or the conductive connecting piece 10 is disengaged from both the first lead wire 20 and the second lead wire 30.

[0032] Under normal operating conditions, i.e., when the organic thermosensitive element is in its first state, the organic thermosensitive element 40 supports the first spring 50, which presses against the insulating connecting piece fixing seat 90. Under elastic support, the insulating connecting piece fixing seat 90 drives the conductive connecting piece 10 to approach the first lead wire 20 and the second lead wire 30, making contact with the first lead wire 20 and the second lead wire 30 for conduction, thus achieving a normal circuit path. When the current in the circuit exceeds the specified value, and the ambient temperature reaches or exceeds the melting point temperature of the organic thermosensitive element, the organic thermosensitive element 40 is in its second state, changing from a solid to a liquid state. The elastically compressed first spring 50 loses its support and changes from a compressed state to a free length state, unable to drive the insulating connecting piece fixing seat 90 to drive the conductive connecting piece 110 to approach the first lead wire 20 and the second lead wire 30. At this time, the conductive connecting piece 10 disengages from either end of the first lead wire 20 or the second lead wire 30, or disengages from both ends of the first lead wire 20 and the second lead wire 30 simultaneously, thereby cutting off the current conduction circuit.

[0033] In this utility model application, the first pin line 20, the second pin line 30, and the conductive connecting piece 10 form a U-shaped conductive path, achieving U-shaped conduction on the same side; the first pin line 20 and the second pin line 30 are fixed in the insulating pin fixing seat 70, isolating them from contact with the outer shell 80, ensuring that they are insulated from the outer shell 80; the conductive connecting piece 10 is set on the insulating connecting piece fixing seat 90, ensuring that it is insulated from the outer shell 80; the outer shell 80 is completely insulated from the internal conductive components, and the outer shell 80 does not need to participate in conduction, ensuring that the outer shell 80 is not energized in both normal conductive state and fuse-broken state, thus improving safety; through the cooperation of the first spring 50 and the temperature-sensing deformation piece 40, a reliable fuse-breaking function is achieved, with a simple structure and rapid response; the technical solution of this utility model improves conductivity stability, reduces the influence of current, temperature, and other factors on the temperature-sensing deformation piece 40, is suitable for high-current application scenarios, further enhances the precise control of the temperature-sensing deformation piece 40, and compared with the traditional fuse-breaking structure, the technical solution of this utility model has lower processing requirements and reduces production costs.

[0034] Furthermore, in Embodiments 3 and 4 of this utility model application, as... Figure 3 , 4 As shown in Figures 5 and 6, the insulating pin holder 70 includes a base 71. Two pin sleeves 72 for passing through the first pin wire 20 and the second pin wire 30 are provided on the base 71. A wire groove 73 is provided in the pin sleeve 72. The first pin wire 20 and the second pin wire 30 are disposed in the wire groove 73, and their contact ports with the conductive connecting piece 10 are disposed at the opening of the wire groove 73, so that they do not protrude too much inward and come into contact with the outer casing 80.

[0035] Furthermore, in Embodiment 3 of this utility model application, as Figure 3, 4 As shown, it includes a second spring 60, which elastically abuts between the seat body 71 of the insulating pin fixing seat 70 and the insulating connecting piece fixing seat 90. In this embodiment, the second spring 60 is an integral large spring, with its lower end fitted onto the upper edge of the insulating connecting piece fixing seat 90 and its upper end abutting against the seat body 71 of the insulating pin fixing seat 70.

[0036] Furthermore, in Embodiment 4 of this utility model application, as Figure 5 , 6 As shown, there are two second springs 60. In this embodiment, the second springs 60 are split into two small springs. The two second springs 60 are respectively fitted onto the pin sleeves 72 of the insulating pin fixing seat 70 and elastically abut against the seat body 71 and the conductive connecting piece 10.

[0037] Furthermore, in Embodiments 3 and 4 of this utility model application, as... Figure 3 , 4 As shown in Figures 5 and 6, an insulating pad 100 is provided between the first spring 50 and the temperature-sensing deformable body 40. The insulating pad 100 further isolates the conductive component and the temperature-sensing deformable body 40, further preventing the temperature-sensing deformable body 40 from being affected by the current and temperature, and also preventing the first spring 50 from directly acting on the organic temperature-sensing body, causing damage to the organic temperature-sensing body, and crushing the organic temperature-sensing body.

[0038] Furthermore, in some embodiments of this utility model application, the outer casing 80 is a metal casing, such as... Figure 1 In the first embodiment shown, the outer shell 80 is square, as shown in... Figure 2 In the second embodiment shown, the outer shell 80 is circular.

[0039] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A thermal fuse with a non-electrically charged outer casing, characterized in that, The device includes a housing (80), within which are disposed an insulating pin holder (70), an insulating connecting piece holder (90), a first pin wire (20), a second pin wire (30), a conductive connecting piece (10), a first spring (50), and a temperature-sensing deformer (40). The first pin wire (20) and the second pin wire (30) are disposed within the insulating pin holder (70), with one end extending towards the inside of the housing (80) and the other end passing through the insulating pin holder (70) and extending out of the housing (80). The conductive connecting piece (10) is disposed on the insulating connecting piece holder (90), and the conductive connecting piece (10) faces the insulating pin holder (70). The first spring (50) and the temperature-sensing deformer (40) are disposed on the side of the insulating connecting piece holder (90) away from the conductive connecting piece (10). Between the temperature-sensing deformer (40) and the insulating connecting piece fixing seat (90); the temperature-sensing deformer (40) has a first state or a second state. When the temperature-sensing deformer (40) is in the first state, the two ends of the first spring (50) are compressed and pressed against the insulating connecting piece fixing seat (90) and the temperature-sensing deformer (40) respectively. The conductive connecting piece (10) contacts the first lead wire (20) and the second lead wire (30) for conduction under the elastic force of the first spring (50). When the temperature-sensing deformer (40) is in the second state, the first spring (50) cannot drive the insulating connecting piece fixing seat (90) to drive the conductive connecting piece (10) to contact the first lead wire (20) and the second lead wire (30). The conductive connecting piece (10) is separated from the first lead wire (20) or the second lead wire (30), or the conductive connecting piece (10) is separated from both the first lead wire (20) and the second lead wire (30).

2. A thermal fuse with a non-electrically charged outer casing according to claim 1, characterized in that, An insulating gasket (100) is provided between the first spring (50) and the temperature-sensitive deformation device (40).

3. A thermal fuse with a non-electrically charged outer casing according to claim 2, characterized in that, The insulating pin holder (70) includes a base (71) on which two pin sleeves (72) for threading the first pin wire (20) and the second pin wire (30) are provided.

4. A thermal fuse with a non-electrically charged outer casing according to claim 3, characterized in that, It includes a second spring (60) that elastically abuts against the seat (71) of the insulating pin holder (70) and the insulating connecting piece holder (90).

5. A thermal fuse with a non-electrically charged outer casing according to claim 3, characterized in that, It includes two second springs (60), which are respectively fitted onto the pin sleeves (72) of the insulating pin holder (70) and elastically abut against the seat body (71) and the conductive connecting piece (10).

6. A thermal fuse with a non-electrically charged outer casing according to claim 1, characterized in that, The thermosensitive shape (40) is an organic thermosensitive material.

7. A thermal fuse with a non-electrically charged outer casing according to claim 1, characterized in that, The outer casing (80) is a metal casing.

8. A thermal fuse with a non-electrically charged outer casing according to claim 7, characterized in that, The outer shell (80) is circular.

9. A thermal fuse with a non-electrically charged outer casing according to claim 7, characterized in that, The outer shell (80) is square.

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