U-shaped PTC (Positive Temperature Coefficient) base heat protector

Abstract

The utility model relates to a U-shaped PTC (Positive Temperature Coefficient) base heat protector, which is characterized by comprising a PTC block which is horizontally arranged and also serves as a base, and two wiring terminals which are arranged at two ends of the PTC block and are perpendicular to the PTC block, so that the two wiring terminals and the PTC block are integrally arranged in a U shape; a temperature control assembly is further arranged on the PTC block, one end of the temperature control assembly is electrically connected with one wiring terminal, and the other end of the temperature control assembly is electrically connected with the other wiring terminal. According to the utility model, the overall structure is more compact, and when the heat protector is used, the heat protector occupies a very small space in the transverse direction of an electric appliance element, so that the heat protector is suitable for the electric appliance element with a very narrow structure, and the application range of the product is greatly widened.

Description

Technical Field

[0001] This utility model relates to the field of thermal protector technology, and in particular to a U-shaped PTC base thermal protector. Background Technology

[0002] In 2021, the applicant filed a utility model patent application with application number "202122099227.4" entitled "A Limiting Assembly Structure for PTC Base and Rivet of Thermal Protector". This technical solution directly uses a PTC as the base, thus eliminating the need for an insulating base and reducing the manufacturing cost of the thermal protector. However, this technology still has the following technical problems in application: because the terminals are respectively set at both ends of the PTC base along its length, the overall length of the thermal protector is relatively large, requiring a large lateral space during use. This makes the thermal protector unsuitable for electrical components with very narrow structures, greatly limiting its applicability.

[0003] Given the aforementioned technical problems in the existing technology, the applicant believes it is necessary to make technical improvements to provide a thermal protector with a more compact structure and smaller size. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned problems and shortcomings, and to provide a U-shaped PTC base thermal protector. By arranging the thermal protector body and the two terminals in a U-shaped structure, this application occupies a very small volume in the horizontal space, thus making it suitable for electrical components with very narrow structures.

[0005] The technical solution of this utility model is implemented as follows: A U-shaped PTC base thermal insulation device, characterized in that: it includes a PTC block arranged horizontally and also serving as a base, and two wiring terminals arranged at both ends of the PTC block and perpendicular to the PTC block, so that the two wiring terminals and the PTC block form a U-shaped layout overall; a temperature control component is also provided on the PTC block, one end of the temperature control component is electrically connected to one of the wiring terminals, and the other end of the temperature control component is electrically connected to the other wiring terminal.

[0006] Furthermore, the two terminals and the temperature control component are respectively arranged on two opposite sides of the PTC block.

[0007] Furthermore, the terminal block includes a wiring terminal and a connecting terminal; the connecting terminal is assembled together with the PTC block and the temperature control component.

[0008] Furthermore, the end of the connecting end is also provided with a support portion.

[0009] Furthermore, an integrally designed transition section is provided between the terminal block and the connection end.

[0010] Furthermore, the temperature control component consists of a moving contact, a bimetallic strip that deforms at high temperature, a moving contact, and a stationary contact. The moving contact is disposed on the moving contact, and the bimetallic strip is disposed on the top or bottom surface of the moving contact.

[0011] Furthermore, it also includes a first rivet and a second rivet. The first rivet rivets one end of the PTC block to one of the terminals, and the stationary contact is disposed on the top surface of the first rivet. The second rivet rivets one end of the moving contact, one end of the bimetallic strip, the other end of the PTC block, and another terminal.

[0012] Furthermore, the other end of the movable contact piece is provided with a bending portion, and the other end of the bimetallic sheet extends into the bending portion and forms a snap-fit ​​assembly structure with the other end of the movable contact piece.

[0013] Furthermore, a shim is provided between the temperature control component and the PTC block.

[0014] Furthermore, the raised block is also provided with supporting protrusions.

[0015] The beneficial effects of this utility model are as follows: In this application, since the two terminals are arranged vertically at both ends of the PTC block, the two terminals and the PTC block form a U-shaped layout. This way, the terminals do not occupy extra space in the length direction, so the thermal protector can be made shorter and the overall structure is more compact. When in use, this application occupies very little space in the lateral direction of the electrical components, thus it is suitable for electrical components with very narrow structures, greatly expanding the application range of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0017] Figure 2 This is a three-dimensional exploded view of the present invention.

[0018] Figure 3 This is a schematic diagram of the terminal block structure in this utility model. Figure 1 .

[0019] Figure 4 This is a schematic diagram of the terminal block structure in this utility model. Figure 2 .

[0020] Figure 5 This is a schematic diagram of the terminal block structure in this utility model. Figure 3 .

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the raised block in this utility model.

[0022] Figure 7 This is a schematic diagram of the overall structure of the present invention. Figure 2 . Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] like Figure 1 , 2 As shown in Figure 7, the U-shaped PTC base thermal protector of this utility model, in order to achieve the purpose proposed by this utility model, includes a PTC block 1 arranged horizontally and serving as a base, and two terminals 2 disposed at both ends of the PTC block 1 and arranged perpendicularly to the PTC block 1, so that the two terminals 2 and the PTC block 1 form a U-shaped layout. A temperature control component 3 is also disposed on the PTC block 1, one end of which is electrically connected to one of the terminals 2, and the other end of which is electrically connected to the other terminal 2. In this way, the terminals 2 are disposed in the vertical direction of the PTC block 1, without occupying additional space in the length direction, thereby making the thermal protector smaller in length, allowing the thermal protector to be made shorter, and the overall structure more compact. In use, this application occupies very little space in the lateral direction of the electrical components, thus being suitable for electrical components with very narrow structures, greatly expanding the application range of the product.

[0025] like Figure 1 , 2 As shown in Figure 7, the two terminals 2 and the temperature control component 3 are respectively arranged on two opposite sides of the PTC block 1. This way, when the circuit overheats and causes the temperature control component 3 to bend and deform, breaking the circuit, the current flows through the PTC block 1, raising its temperature. The PTC block 1 can directly heat the temperature control component 3, keeping it in a bent and deformed state, thus ensuring the circuit remains disconnected until the power is manually cut off. Only then can the PTC block 1 stop heating, and the temperature control component 3 gradually cool and reset. This prevents the electrical appliance's power supply from repeatedly switching on and off, improving safety; simultaneously, it prevents the temperature control component 3 from repeatedly deforming and resetting, effectively preventing material fatigue and extending its service life.

[0026] like Figures 2 to 5 As shown, the terminal block 2 includes a terminal 21 and a connecting terminal 22; the connecting terminal 22 is assembled together with the PTC block 1 and the temperature control component 3. This results in a relatively simple structure for the terminal block 2. Figure 2As shown, the terminal 2 has a straight plate structure, which is convenient for processing and manufacturing, and the structural strength of the terminal 2 is also good; or further, in order to save materials, the area of ​​the terminal 21 can be reduced on the basis of the straight plate structure, so that the terminal 2 has an L-shaped structure, thereby saving materials and reducing costs.

[0027] like Figures 2 to 5 As shown, the end of the connection terminal 22 is also provided with a support portion 23. In this way, when the thermal protector is installed on the electrical component, the support portion 23 can provide support, preventing the PTC block 1 and the temperature control component 3 from directly contacting the electrical component, thereby preventing interference when the thermal protector is working, and thus more effectively ensuring the safety of the circuit.

[0028] like Figure 4 , Figure 5 As shown, an integrally designed transition portion 24 is also provided between the terminal 21 and the connection terminal 22. Figure 4 As shown, the transition section 24 has a linear structure, and the terminal 21, the transition section 24, and the connecting end 22 are located on the same plane. This design of the transition section 24 saves material on the terminal 2 and reduces production costs; or as... Figure 5 As shown, the transition part 24 is a bent part, and the terminal 21 and the connecting end 22 are arranged vertically parallel. This allows the terminal 21 to be a larger distance from the bottom edge of the thermal protector, providing a more spacious operating space when connecting the external power cord, thus making it easier to connect the external power cord.

[0029] like Figure 1 , 2 As shown in Figure 7, the temperature control component 3 consists of a moving contact 31, a bimetallic strip 32 that deforms at high temperatures, a moving contact 33, and a stationary contact 34. The moving contact 33 is disposed on the moving contact 31, and the bimetallic strip 32 is disposed on the top or bottom surface of the moving contact 31. Thus, when a circuit fault occurs, causing the temperature to rise, the bimetallic strip 32 deforms, causing the moving contact 31 to spring up, separating the moving contact 33 from the stationary contact 34, thereby cutting off the circuit and ensuring the safety of the electrical equipment. To ensure the conductivity of the stationary contact 34, the stationary contact 34 is silver-plated.

[0030] like Figure 1 , 2As shown in Figures 7 and 8, the assembly also includes a first rivet 5 and a second rivet 6. The first rivet 5 rivets one end of the PTC block 1 to one of the terminals 2, and the stationary contact 34 is disposed on the top surface of the first rivet 5. The second rivet 6 rivets one end of the moving contact 31, one end of the bimetallic strip 32, the other end of the PTC block 1, and the other terminal 2 together. In this way, the various parts of the temperature control assembly 3 can be quickly and firmly assembled together by riveting, and the first rivet 5 can also be used as a locking structure and a stationary contact, which helps to reduce the manufacturing difficulty and manufacturing cost of this application.

[0031] like Figure 1 , 2 As shown in Figure 7, the other end of the movable contact 31 is also provided with a bent portion 311. The other end of the bimetallic strip 32 extends into the bent portion 311 and forms a snap-fit ​​assembly structure with the other end of the movable contact 31. In this way, the ends of the bimetallic strip 32 and the movable contact 31 are snap-fitted together. When the bimetallic strip 32 deforms and drives the movable contact 31 to move, the two are less likely to shift or move, thereby ensuring the sensitivity of the temperature control component 3 and more effectively ensuring the safety of the circuit.

[0032] like Figure 1 , 2 As shown in Figures 7 and 8, a shim block 4 is also provided between the temperature control component 3 and the PTC block 1. Figure 7 As shown, the first rivet 5 protrudes from the surface of the PTC block 1. The shim 4 ensures that the moving contact 31 is parallel to the PTC block 1, allowing for stable, reliable, and sufficient contact between the moving contact 33 and the stationary contact 34, thus guaranteeing smooth circuit operation. Furthermore, the shim 4 also has a recess 42, providing ample space for the moving contact 31 to move smoothly without external interference, ensuring safe operation of the electrical appliance.

[0033] like Figure 6 As shown, the raised block 4 is also provided with a supporting protrusion 41. In this way, when the bimetallic strip 32 is heated and bent upwards, the supporting protrusion 41 can provide support for the bimetallic strip 32, thereby ensuring that the moving contact 31 can smoothly lift the moving contact 33 and separate it from the stationary contact 34 to cut off the power supply and ensure the safety of the circuit; at the same time, it can also prevent the bimetallic strip 32 from bending and deforming for a long time and causing material fatigue, which helps to extend the service life of the bimetallic strip 32.

Claims

1. A U-shaped PTC base heat preserver, characterized in that: The PTC block (1) is arranged horizontally and serves as a base, two wire terminals (2) are arranged vertically on both ends of the PTC block (1), and the two wire terminals (2) and the PTC block (1) are arranged in a U-shaped layout as a whole. A temperature control assembly (3) is further arranged on the PTC block (1), one end of the temperature control assembly (3) is electrically connected with one of the wire terminals (2), and the other end of the temperature control assembly (3) is electrically connected with the other wire terminal (2).

2. The U-shaped PTC submount heat sink of claim 1, wherein: The two wire terminals (2) and the temperature control assembly (3) are arranged on opposite sides of the PTC block (1).

3. The U-shaped PTC submount heat sink of claim 1, wherein: The wire terminal (2) comprises a wire end (21) and a connecting end (22), and the connecting end (22) is assembled with the PTC block (1) and the temperature control assembly (3).

4. The U-shaped PTC submount heat sink of claim 3, wherein: The connecting end (22) is further provided with a supporting part (23) at the end.

5. The U-shaped PTC submount heat sink of claim 3, wherein: A transition part (24) is further arranged between the wire end (21) and the connecting end (22).

6. The U-shaped PTC submount heat sink of claim 1, wherein: The temperature control assembly (3) comprises a moving contact (31), a bimetallic strip (32) which deforms at high temperature, a moving contact point (33) and a stationary contact point (34), the moving contact point (33) is arranged on the moving contact (31), and the bimetallic strip (32) is arranged on the top surface or the bottom surface of the moving contact (31).

7. The U-shaped PTC submount heat sink of claim 6, wherein: The temperature control assembly (3) further comprises a first rivet (5) and a second rivet (6), the first rivet (5) rivets one end of the PTC block (1) and one of the wire terminals (2) together, and the stationary contact point (34) is arranged on the top surface of the first rivet (5); the second rivet (6) rivets one end of the moving contact (31), one end of the bimetallic strip (32), the other end of the PTC block (1) and the other wire terminal (2) together.

8. The U-shaped PTC submount heat sink of claim 7, wherein: The other end of the moving contact (31) is further provided with a bending part (311), and the other end of the bimetallic strip (32) extends into the bending part (311) and forms a clamping assembly structure with the other end of the moving contact (31).

9. The U-shaped PTC submount heat sink of claim 6, wherein: The temperature control assembly (3) and the PTC block (1) are further provided with a raised block (4).

10. The U-shaped PTC submount heat sink of claim 9, wherein: The raised block (4) is further provided with a supporting column (41).

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