A strip fuse

Abstract

The utility model provides a kind of shell fragment fuse, including shell, is equipped with electrically conductive body fixing seat in shell, first electrically conductive body and second electrically conductive body are equipped on the electrically conductive body fixing seat, the first electrically conductive body and second electrically conductive body one end expose in the lower end of electrically conductive body fixing seat, the other end passes through electrically conductive body fixing seat and exposes in shell outside;Conductive spring and temperature sensor are sequentially equipped below the electrically conductive body fixing seat.In the utility model application, first electrically conductive body, second electrically conductive body and conductive spring form U type electrically conductive path, realize same side U type electrically conductive, U type electrically conductive path shortens current flow distance, reduces resistance and energy loss;Through the cooperation of conductive spring and temperature sensor, reliable fusing function is realized, structure is simple, reacts quickly;The structure of conductive spring guarantees mechanical elasticity, and also reduces use cost, the elastic pressure of conductive spring can ensure low contact resistance under normal state, reduces energy consumption, spring is quickly bounced off when temperature sensor fails, cut-off speed is faster than traditional fuse fusing process, has potential in miniaturization, accurate temperature control and cost control.

Description

Technical Field

[0001] This utility model relates to a thermal fuse, specifically a spring-loaded fuse. 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 contain springs, but springs present several problems: they are costly, complex to install, and require limit switches. Otherwise, they may shift, leading to delayed power-off triggering after the temperature sensor melts or poor power connection under normal conditions.

[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 spring-loaded fuse, the technical solution of which includes:

[0006] A spring-loaded fuse includes a housing, a conductor holder inside the housing, a first conductor and a second conductor on the conductor holder, one end of the first conductor and the second conductor protruding from the lower end of the conductor holder, and the other end passing through the conductor holder and protruding outside the housing; a conductive spring and a temperature sensing element are sequentially arranged below the conductor holder, the temperature sensing element having a first state or a second state, when the temperature sensing element is in the first state, one end of the conductive spring elastically abuts against the temperature sensing element, and the other end elastically abuts against the ends of the first conductor and the second conductor, when the temperature sensing element is in the second state, the conductive spring disengages from either or both of the first conductor and the second conductor.

[0007] According to an embodiment of the present invention, a spring-loaded fuse is provided on the temperature sensing element, and the conductive spring is disposed on the spring-loaded fuse.

[0008] According to an embodiment of the present invention, a spring-loaded fuse includes an upper elastic plane, a lower elastic plane, and an elastic curved surface connecting the upper and lower elastic planes; the lower elastic plane is fixedly connected to a spring seat, and when the temperature sensing element is in a first state, the upper elastic plane abuts against the ends of a first conductor and a second conductor.

[0009] According to an embodiment of the present invention, a spring-loaded fuse has a spring seat that is a semi-enclosed structure with one end open, and the open end of the spring seat faces the conductor fixing seat. The spring seat isolates the temperature sensing element and the conductive spring.

[0010] According to an embodiment of the present invention, a spring-loaded fuse is provided, wherein the conductor fixing seat and the spring seat are insulators.

[0011] According to an embodiment of the present invention, a spring is provided between the conductor fixing seat and the conductive spring, and the two ends of the spring elastically abut against the conductor fixing seat and the conductive spring, respectively.

[0012] According to an embodiment of the present utility model, a spring-loaded fuse includes a base body on which two conductive sleeves for mounting a first conductive body and a second conductive body are provided; a spring is disposed between the two conductive sleeves, and the two ends of the spring elastically abut against the lower end face of the base body and the conductive spring respectively, and the elastic force of the spring is less than the elastic force of the conductive spring.

[0013] According to an embodiment of the present invention, a spring-loaded fuse is provided, wherein the housing is a circular cylinder or a square housing.

[0014] According to an embodiment of the present invention, the temperature sensing element is an organic temperature sensing element, a shape memory alloy, or a bimetallic sheet temperature sensing element.

[0015] According to an embodiment of the present utility model, a spring-loaded fuse is provided with a buckle on the inner bottom surface of the spring seat and a locking hole is provided on the lower elastic plane of the spring, and the buckle is fixedly connected to the spring seat.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this utility model application, the first conductor, the second conductor, and the conductive spring form a U-shaped conductive path, achieving U-shaped conduction on the same side. The U-shaped conductive path shortens the current flow distance, reducing resistance and energy loss. Through the cooperation of the conductive spring and the temperature sensing element, a reliable fuse function is achieved. The structure is simple and the response is rapid. The structure of the conductive spring ensures mechanical elasticity, allowing it to elastically contact the conductive end under the support of the temperature sensing element, elastically abutting against the first and second conductors, and simultaneously acting as a conductor. The contact conductivity is good, reducing the cost of use. The elastic pressure of the conductive spring ensures low contact resistance under normal conditions, reducing energy consumption. When the temperature sensing element fails, the spring quickly springs away, with a cutting speed faster than the traditional fuse melting process. It has potential in miniaturization, precise temperature control, and cost control. Attached Figure Description

[0018] 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:

[0019] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0020] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Explanation of key component symbols:

[0022] 10. Conductive spring; 11. Upper elastic plane; 12. Lower elastic plane; 13. Elastic curved surface; 20. First conductor; 30. Second conductor; 40. Temperature sensing element; 50. Housing; 60. Conductor fixing seat; 61. Seat body; 62. Conductor sleeve; 70. Spring seat; 80. Spring. Detailed Implementation

[0023] 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.

[0024] 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 specifying the number of indicated technical features or their sequential relationship.

[0025] 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.

[0026] 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.

[0027] Example

[0028] This utility model provides a spring-loaded fuse, such as Figure 1 , 2 As shown, the device includes a housing 50, within which a conductor fixing seat 60 is provided. A first conductor 20 and a second conductor 30 are provided on the conductor fixing seat 60. One end of the first conductor 20 and the second conductor 30 is exposed at the lower end of the conductor fixing seat 60, and the other end passes through the conductor fixing seat 60 and is exposed outside the housing 50. Below the conductor fixing seat 60, a conductive spring 10 and a temperature sensor 40 are arranged in sequence. The temperature sensor 40 has a first state or a second state. When the temperature sensor 40 is in the first state, one end of the conductive spring 10 elastically abuts against the temperature sensor 40, and the other end elastically abuts against the ends of the first conductor 20 and the second conductor 30. When the temperature sensor 40 is in the second state, the conductive spring 10 is detached from either or both of the first conductor 20 and the second conductor 30.

[0029] In this embodiment, the temperature sensor 40 is an organic temperature sensor. Under normal use, i.e., when the temperature sensor 40 is in the first state, the temperature sensor 40 supports the conductive spring 10, and the conductive spring 10 presses against the first conductor 20 and the second conductor 30. The conductive connecting piece contacts the first conductor 20 and the second conductor 30 to conduct electricity, thus realizing a circuit path under normal conditions. When the current in the circuit exceeds a specified value, and the ambient temperature reaches or exceeds the melting point temperature of the temperature sensor 40, the temperature sensor 40 is in the second state. The temperature sensor 40 changes from a solid state to a liquid state, and the conductive spring 10 loses the support of the temperature sensor 40 and extends from the compressed state. It can no longer press against the first conductor 20 and the second conductor 30, and the conductive spring 10 cannot form a path with the first conductor 20 and the second conductor 30.

[0030] In this utility model application, the first conductor 20, the second conductor 30, and the conductive spring 10 form a U-shaped conductive path, achieving U-shaped conduction on the same side. The U-shaped conductive path shortens the current flow distance and reduces resistance and energy loss. Through the cooperation of the conductive spring 10 and the temperature sensing element 40, a reliable fuse function is achieved. The structure is simple and the response is rapid. The structure of the conductive spring 10 ensures mechanical elasticity, allowing it to elastically contact the conductive end under the support of the temperature sensing element 40, elastically abutting against the first conductor 20 and the second conductor 30, while also acting as a conductor. The contact conductivity is good, reducing the cost of use. The elastic pressure of the conductive spring 10 ensures low contact resistance under normal conditions, reducing energy consumption. When the temperature sensing element fails, the spring quickly springs away, and the cutting speed is faster than the traditional fuse melting process. It has potential in miniaturization, precise temperature control, and cost control.

[0031] To facilitate the installation of the conductive spring 10, further, in the embodiments of this utility model application, such as Figure 2 As shown, a spring holder 70 is provided on the temperature sensing element 40, and the conductive spring 10 is disposed on the spring holder 70; the spring holder 70 is a semi-enclosed structure with one end open, and one end of its opening faces the direction of the conductor fixing seat 60. The spring holder 70 isolates the temperature sensing element 40 and the conductive spring 40. The conductive spring 10 includes an upper elastic plane 11, a lower elastic plane 12, and an elastic curved surface 13 connecting the upper elastic plane 11 and the lower elastic plane 12. The lower elastic plane 12 is fixedly connected to the spring seat 70. When the temperature sensing body 40 is in the first state, the upper elastic plane 11 abuts against the ends of the first conductor 20 and the second conductor 30. The planar upper elastic plane 11 and lower elastic plane 12 ensure good contact with the first conductor 20 and the second conductor 30, and also ensure good fixation on the spring seat 70. A buckle is provided on the inner bottom surface of the spring seat 70, and a locking hole is provided on the lower elastic plane of the spring. The buckle is fixedly connected to the buckle.

[0032] In the embodiments of this utility model application, such as Figure 2 As shown, the conductor fixing seat 60 and the spring holder 70 are insulators, which isolate the first conductor 20, the second conductor 30 and the conductive spring 10 from contact with the housing 50, ensuring that they are insulated from the housing 50. The housing 50 is completely insulated from the internal conductive components, ensuring that the housing 50 is not energized in both the normal conductive state and the fused state, thus improving safety.

[0033] Furthermore, in the embodiments of this utility model application, such as Figure 2As shown, a spring 80 is provided between the conductor fixing base 60 and the conductive spring 10. The two ends of the spring 80 elastically abut against the conductor fixing base 60 and the conductive spring 10, respectively. The elastic force of the spring 80 is less than the elastic force of the conductive spring 10. When the current in the circuit exceeds the specified value and the ambient temperature reaches or exceeds the melting point temperature of the temperature sensing element 40, the temperature sensing element 40 is in the second state, changing from solid to liquid. The conductive spring 10 loses its support and can no longer press against the first conductor 20 and the second conductor 30. The spring 80 pushes the conductive spring 10 away from the temperature sensing element 40, so that the conductive spring 10 is completely separated from the first conductor 20 and the second conductor 30, ensuring that the circuit is disconnected.

[0034] Furthermore, in the embodiments of this utility model application, such as Figure 2 As shown, the conductor fixing base 60 includes a base body 61, on which two conductor sleeves 62 for mounting the first conductor 20 and the second conductor 30 are provided; the spring 80 is disposed between the two conductor sleeves 62, and the two ends of the spring 80 elastically abut against the lower end face of the base body 61 and the conductive spring sheet 10, respectively.

[0035] Furthermore, in the embodiments of this utility model application, the temperature sensing element 40 is a shape memory alloy. In this embodiment, under normal use, i.e., when the temperature sensing element 40 is in the first state, the temperature sensing element 40 supports the conductive spring 10, the conductive spring 10 elastically abuts against the first conductor 20 and the second conductor 30, and the conductive connecting piece contacts the first conductor 20 and the second conductor 30 to conduct electricity, thus realizing the circuit path under normal conditions; when the current in the circuit exceeds a specified value, and the ambient temperature reaches or exceeds the deformation temperature of the temperature sensing element 40, the temperature sensing element 40 deforms. When the conductive spring 10 collapses, it loses the support of the temperature sensing body 40 and expands from its compressed state, unable to make tight contact with the first conductor 20 and the second conductor 30. The conductive spring 10 cannot form a circuit with the first conductor 20 and the second conductor 30. When the temperature of the temperature sensing body 40 is lower than its deformation temperature, the temperature sensing body 40 deforms and recovers, supporting the conductive spring 10 again. The conductive spring 10 elastically presses against the first conductor 20 and the second conductor 30, and the conductive connecting piece makes contact with the first conductor 20 and the second conductor 30 to conduct electricity. Under these circumstances, the circuit is reconnected.

[0036] Furthermore, in the embodiments of this utility model application, such as Figure 1 As shown, the shell 50 is a square shell, but it can also be a cylindrical shell, or other shapes and specifications.

[0037] 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 spring-loaded fuse, characterized in that, The device includes a housing (50), and a conductor fixing seat (60) is provided inside the housing (50). A first conductor (20) and a second conductor (30) are provided on the conductor fixing seat (60). One end of the first conductor (20) and the second conductor (30) is exposed at the lower end of the conductor fixing seat (60), and the other end passes through the conductor fixing seat (60) and is exposed outside the housing (50). A conductive spring (10) and a temperature sensor (40) are arranged in sequence below the conductor fixing seat (60). The temperature sensor (40) has a first state or a second state. When the temperature sensor (40) is in the first state, one end of the conductive spring (10) elastically abuts against the temperature sensor (40), and the other end elastically abuts against the ends of the first conductor (20) and the second conductor (30). When the temperature sensor (40) is in the second state, the conductive spring (10) is separated from either or both of the first conductor (20) and the second conductor (30).

2. The spring-loaded fuse according to claim 1, characterized in that, A spring holder (70) is provided on the temperature sensor (40), and the conductive spring (10) is provided on the spring holder (70).

3. A spring-loaded fuse according to claim 2, characterized in that, The conductive spring (10) includes an upper elastic plane (11), a lower elastic plane (12), and an elastic curved surface (13) connecting the upper elastic plane (11) and the lower elastic plane (12); the lower elastic plane (12) is fixedly connected to the spring seat (70), and when the temperature sensor (40) is in the first state, the upper elastic plane (11) abuts against the ends of the first conductor (20) and the second conductor (30).

4. A spring-loaded fuse according to claim 3, characterized in that, The spring holder (70) is a semi-enclosed structure with one end open, and one end of its opening faces the direction of the conductor fixing seat (60). The spring holder (70) isolates the temperature sensing body (40) and the conductive spring (10).

5. A spring-loaded fuse according to claim 4, characterized in that, The conductor holder (60) and the spring holder (70) are insulators.

6. A spring-loaded fuse according to claim 5, characterized in that, A spring (80) is provided between the conductor fixing seat (60) and the conductive spring (10). The two ends of the spring (80) elastically abut against the conductor fixing seat (60) and the conductive spring (10) respectively. The elastic force of the spring (80) is less than that of the conductive spring (10).

7. A spring-loaded fuse according to claim 6, characterized in that, The conductor fixing seat (60) includes a seat body (61), on which two conductor sleeves (62) for setting the first conductor (20) and the second conductor (30) are provided; the spring (80) is disposed between the two conductor sleeves (62), and the two ends of the spring (80) elastically abut against the lower end face of the seat body (61) and the conductive spring sheet (10) respectively.

8. A spring-loaded fuse according to claim 1, characterized in that, The shell (50) is a circular cylinder or a square shell.

9. A spring-loaded fuse according to claim 1, characterized in that, The temperature sensor (40) is an organic temperature sensor, a shape memory alloy, or a bimetallic sheet temperature sensor.

10. A spring-loaded fuse according to claim 4, characterized in that, A buckle is provided on the inner bottom surface of the spring holder (70), and a locking hole is provided on the lower elastic plane of the spring, and the buckle is fixedly connected to the spring holder.

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