A riveted heating sheet

Abstract

The present invention relates to a riveted heating sheet, comprising a first heating sheet and a second heating sheet, wherein a support body is arranged between the first heating sheet and the second heating sheet, one end of the support body is connected to the first heating sheet, and the other end is connected to the other end of the support body; both ends of the first heating sheet and the second heating sheet are provided with a riveted structure. The riveted heating sheet provided by the present invention can be automatically installed with the aid of a riveting tool, with high efficiency and high qualified rate.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal protector accessories, and in particular relates to a riveted heating sheet. Background Art

[0002] A thermal protector is a commonly used circuit protection element. The patent document with application number 201910427597.0 discloses a thermal protector with good performance. In the thermal protector, a series circuit formed by a thermistor and a resistance wire is connected in parallel to the circuit formed by the static contact and the moving contact. When the circuit is overloaded, short-circuited or other faults occur in the thermal protector, the current flowing through the series circuit formed by the thermistor and the resistance wire increases rapidly, and the heat generated by the thermistor promotes the rapid separation of the moving contact and the static contact, thereby improving the sensitivity of the thermistor.

[0003] In production, the resistance wire is cut manually and placed inside the product one by one, and then put into the protector product manually. This method has the following problems:

[0004] 1. The efficiency of manual installation is low, and due to the different technical levels of different people, the quality of the products produced is different, and the product qualification rate is low;

[0005] 2. After the resistance wire is welded to the two bottom plates, the two bottom plates are easily twisted and deformed relative to each other when the bottom plates are connected to the outer shell, which causes great trouble for the installation of the bottom plates, especially for small and micro thermal protectors, whose space structure is limited. Once the two bottom plates are twisted and deformed relative to each other, it is difficult to install, so it cannot be installed automatically. Summary of the invention

[0006] In view of the problems existing in the above-mentioned prior art, the present invention provides a riveted heating sheet that solves the above-mentioned technical problems.

[0007] In order to achieve the above-mentioned object of the invention, the technical solution provided by the present invention is as follows:

[0008] A riveted heating sheet comprises a first heating sheet and a second heating sheet, wherein a support body is arranged between the first heating sheet and the second heating sheet, one end of the support body is connected to the first heating sheet, and the second heating sheet is connected to the other end of the support body; both ends of the first heating sheet and the second heating sheet are provided with a riveted structure.

[0009] Preferably, the first heating sheet and the second heating sheet are arranged in parallel; the support body is perpendicular to the first heating sheet and the second heating sheet, and connects the first heating sheet and the second heating sheet into one body to form an I-shaped structure.

[0010] Preferably, the first heating sheet and the second heating sheet are cross-arranged as a whole, and the connection position forms the support body.

[0011] Preferably, the riveting structure is a riveting hole.

[0012] Preferably, a plurality of fracture marks are arranged in the circumferential direction of the inner side of the riveting hole.

[0013] Preferably, the riveted structure is a riveted column.

[0014] Preferably, the front end of the riveted structure is a spherical surface protruding forward, and an opening penetrating through both sides of the spherical surface is provided in the middle position of the front end of the riveted structure. Guide portions are symmetrically provided on both sides of the opening, and the guide portions include a first arc connected to the front end of the spherical surface, a second arc connected to the side wall of the opening, and a third arc connecting the first arc and the second arc, the arc surfaces of the first arc and the second arc protrude outward, and the arc surface of the third arc protrudes inward; the first arc is located on the outside of the spherical surface, the guide portion is located on the inside of the opening, and there is a spacing between the two guide portions.

[0015] Preferably, the opening is in a rectangular shape.

[0016] Preferably, the spherical shape of the front end of the riveted structure is replaced by a truncated cone shape whose front end diameter is smaller than the rear end diameter, and the rear end of the truncated cone shape is flush with the bottom end of the opening.

[0017] The riveted heating sheet provided by the present invention is provided with a structure matching the riveted structure on the two bottom plates before use, and after the two bottom plates are fixed, the heating sheet can be conveniently riveted to the two bottom plates. The structure can be automatically installed with the aid of a riveting tool, with high efficiency and a high pass rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a riveted heating sheet according to Embodiment 1 is shown;

[0019] Figure 2 A schematic structural diagram of a riveting hole in Example 1 is shown;

[0020] Figure 3 A schematic structural diagram of a riveted heating sheet according to Embodiment 2 is shown;

[0021] Figure 4 One of the structural schematic diagrams of a riveted column in Example 2 is shown;

[0022] Figure 5 A schematic structural diagram of a guide portion of Embodiment 2 is shown;

[0023] Figure 6 A second structural schematic diagram of a riveted column in accordance with Embodiment 2 is shown;

[0024] Markings in the figure: first heating plate 5, second heating plate 6, support body 7, riveting hole 8, fracture mark 8-1, riveting column 9, opening 9-1, guide part 9-2, first arc 9-3, third arc 9-4, second arc 9-5. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example 1: See Figure 1 This embodiment provides a riveted heating sheet, including a first heating sheet 5 and a second heating sheet 6, wherein the first heating sheet and the second heating sheet are arranged in parallel; a support body 7 is arranged between the first heating sheet and the second heating sheet, wherein the support body is perpendicular to the first heating sheet and the second heating sheet, and connects the first heating sheet and the second heating sheet into one body to form an I-shaped structure, and riveted structures are arranged at both ends of the first heating sheet and the second heating sheet.

[0027] Before using this structure, the two base plates must also be provided with a structure that cooperates with the riveting structure, and after the two base plates are fixed, the heating plate can be conveniently riveted to the two base plates. This structure can be automatically installed with the help of riveting tools, with high efficiency and high pass rate.

[0028] When riveting, the two base plates can be assembled with the thermal protector shell and then directly riveted, or the two base plates can be installed on the mold and the heating plate can be riveted and then assembled with the thermal protector shell. No matter how they are assembled, the first heating plate and the second heating plate support each other through the support body and will not be twisted or deformed, which is conducive to automated installation.

[0029] As an implementation method, see Figure 2 The riveting structure is a riveting hole 8, and a plurality of fracture marks 8-1 are circumferentially arranged on the inner side of the riveting hole. By circumferentially arranging a plurality of fracture marks on the riveting hole, the manufacturing accuracy requirements for the riveting columns on the two base plates can be reduced or the manufacturing accuracy of the riveting holes can be reduced: when the diameter of the riveting column is larger than the diameter of the riveting hole, making it difficult for the riveting column to pass through the riveting hole, the plurality of fracture marks are forced to open, so that the diameter of the riveting hole increases, thereby facilitating the riveting column to pass through the riveting hole. Of course, when the manufactured riveting hole and the riveting column are suitable, the fracture marks will not be opened.

[0030] Example 2: See Figure 3This embodiment provides a riveted heating sheet, including a first heating sheet 5 and a second heating sheet 6, wherein the first heating sheet and the second heating sheet are arranged in parallel; a support body 7 is arranged between the first heating sheet and the second heating sheet, wherein the first heating sheet and the second heating sheet are cross-arranged as a whole, and the connection position forms the support body, and riveted structures are arranged at both ends of the first heating sheet and the second heating sheet.

[0031] Before using this structure, the two base plates must also be provided with a structure that cooperates with the riveting structure, and after the two base plates are fixed, the heating plate can be conveniently riveted to the two base plates. This structure can be automatically installed with the help of riveting tools, with high efficiency and high pass rate.

[0032] When riveting, the two base plates can be assembled with the thermal protector shell and then directly riveted, or the two base plates can be installed on the mold and the heating plate can be riveted and then assembled with the thermal protector shell. No matter how they are assembled, the first heating plate and the second heating plate form two triangular structures and support each other without distortion, which is conducive to automated installation.

[0033] As an implementation method, see Figure 4 and Figure 5 The riveted structure is a riveted column 9, and the front end of the riveted structure (the end that first contacts the structure that cooperates with it during riveting) is a spherical surface protruding forward, and an opening 9-1 that runs through both sides of the spherical surface is provided in the middle position of the front end of the riveted structure. The shape of the opening is rectangular, and guide parts 9-2 are symmetrically provided on both sides of the opening. The guide parts include a first arc 9-3 connected to the front end of the spherical surface, a second arc 9-5 connected to the side wall of the opening, and a third arc 9-4 connecting the first arc and the second arc, the arc surfaces of the first arc and the second arc protrude outward, and the arc surface of the third arc protrudes inward, the first arc is located on the outside of the spherical surface, and the guide part is located on the inside of the opening, and there is a spacing between the two guide parts.

[0034] In this structure, during riveting, the guide part first passes through the riveting hole of the base plate. When the riveting hole at the front end of the riveting column is squeezed, the opening contracts inward, which is conducive to the front end of the riveting column passing through the riveting hole on the base plate. After the front end of the riveting column passes through the riveting hole, the opening returns to its original state, and external force is applied to the front end of the riveting column. The two guide parts bend inward and support each other, so that the opening expands outward, thereby making the riveting more secure. Of course, during riveting, the front end of the riveting column also expands outward as a whole.

[0035] The depth of the opening can be set slightly deeper. In this way, assuming that the diameter of the rivet hole is not made very accurately and is slightly smaller than the diameter of the rivet hole, although the rivet column cannot completely pass through the rivet hole, the rivet connection can be made very firm because the opening expands outward and the front end of the rivet column also expands outward as a whole.

[0036] As a variation, see Figure 6 The front end of the rivet column can also be a truncated cone with a front diameter smaller than the rear diameter, and the rear end of the truncated cone is flush with the bottom end of the opening. This can better ensure the firmness of the riveting when the diameter of the rivet hole is smaller than the diameter of the rivet column.

[0037] It should be noted that the riveting structures in the above-mentioned embodiment 1 and embodiment 2 can be commonly used.

[0038] The above-mentioned embodiments only express the 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 modifications 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 based on the attached claims.

Claims

1. A riveted heating sheet for a thermal protector, characterized in that , comprising a first heating sheet (5) and a second heating sheet (6), wherein a support body (7) is provided between the first heating sheet and the second heating sheet, one end of the support body (7) is connected to the first heating sheet, and the second heating sheet is connected to the other end of the support body; Both ends of the first heating sheet and the second heating sheet are provided with riveted structures; The first heating sheet and the second heating sheet are arranged in parallel; The support body is perpendicular to the first heating sheet and the second heating sheet, and connects the first heating sheet and the second heating sheet into one body to form an I-shaped structure.

2. A riveted heating sheet for a thermal protector according to claim 1, characterized in that: The first heating sheet and the second heating sheet are cross-arranged as a whole, and the connection position forms the support body.

3. A riveted heating sheet for a thermal protector according to any one of claims 1 to 2, characterized in that: The riveting structure is a riveting hole (8).

4. A riveted heating sheet for a thermal protector according to claim 3, characterized in that: A plurality of fracture marks (8-1) are arranged in the circumferential direction of the inner side of the riveting hole.

5. A riveted heating sheet for a thermal protector according to any one of claims 1 to 2, characterized in that: The riveted structure is a riveted column (9).

6. A riveted heating sheet for a thermal protector according to claim 5, characterized in that: The front end of the riveted structure is a spherical surface protruding forward, an opening (9-1) penetrating both sides of the spherical surface is arranged in the middle position of the front end of the riveted structure, and guide parts (9-2) are symmetrically arranged on both sides of the opening, and the guide parts include a first arc (9-3) connected to the front end of the spherical surface, a second arc (9-5) connected to the side wall of the opening, and a third arc (9-4) connecting the first arc and the second arc, the arc surfaces of the first arc and the second arc protrude outward, and the arc surface of the third arc protrudes inward; The first arc is located outside the spherical surface, the guide portion is located inside the opening, and there is a distance between the two guide portions.

7. A riveted heating sheet for a thermal protector according to claim 6, characterized in that: The opening is in a rectangular shape.

8. A riveted heating sheet for a thermal protector according to claim 7, characterized in that: The spherical shape of the front end of the riveted structure is replaced by a truncated cone shape whose front end diameter is smaller than that of the rear end, and the rear end of the truncated cone shape is flush with the bottom end of the opening.

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