Bimetal sheet riveting structure and temperature controller

Abstract

The utility model discloses a bimetallic strip riveting structure and a temperature controller, each comprising a power connection terminal and a bimetallic strip assembly, the power connection terminal is provided with a riveting sleeve extending vertically and upwards, the bimetallic strip assembly is provided with an installation through hole, the riveting sleeve is arranged in the installation through hole in a penetrating manner, and the bimetallic strip assembly is arranged in the installation through hole. An annular flange located on the periphery of the mounting through hole is formed at the upper end of the riveting sleeve, and the annular flange and the power connection terminal jointly clamp the bimetallic strip assembly. According to the structure, the riveting sleeve on the power connection terminal penetrates through the mounting through hole of the bimetallic strip assembly, and the upper end of the riveting sleeve forms the annular flange which abuts against the peripheral edge of the mounting through hole in a stamping and riveting mode, so that the bimetallic strip assembly is clamped between the annular flange and the power connection terminal; the double-metal-sheet assembly is beneficial to increasing the contact area of the riveting position of the double-metal-sheet assembly, the double-metal-sheet assembly is suitable for double metal sheets with the small width size on the premise that the riveting strength is guaranteed, materials are saved, and the riveting stability is high.

Description

Technical Field

[0001] The utility model relates to a bimetal riveting structure and a temperature controller. Background Art

[0002] A bimetal is a composite material composed of two or more metals or other materials with suitable properties. Due to the different coefficients of thermal expansion of each component layer, when the temperature changes, the deformation of the active layer is greater than that of the passive layer. Thus, the whole bimetal will bend towards the passive layer side, and the curvature of this composite material changes to generate deformation.

[0003] A bimetal component includes a bimetal and a conductive elastic sheet laminated on the bimetal. The bimetal component is widely used in relays, switches, controllers, etc. When the bimetal component is used as a switch, generally, one end of the bimetal component is riveted to an electrical connection terminal, and the other end of the bimetal can drive the conductive elastic sheet to contact or separate from another electrical connection terminal. To prevent the bimetal component from rotating relative to the electrical connection terminal, two riveting posts riveted to the electrical connection terminal are arranged at intervals in the width direction at one end of the bimetal component. Among them, for a bimetal component with a small width dimension, arranging two riveting posts at intervals in the width direction will result in insufficient strength after riveting, affecting the service life of the device. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a riveting structure applicable to bimetals with small width dimensions on the premise of ensuring the riveting strength.

[0005] According to a bimetal riveting structure of the first aspect embodiment of the utility model, it includes: an electrical connection terminal and a bimetal component. The electrical connection terminal is formed with a riveting sleeve extending vertically upward. The bimetal component is provided with an installation through hole. The riveting sleeve passes through the installation through hole. An annular flange is formed at the upper end of the riveting sleeve and is located on the outer periphery of the installation through hole. The annular flange and the electrical connection terminal jointly clamp the bimetal component.

[0006] According to the bimetal riveting structure of the embodiment of the utility model, it has at least the following beneficial effects:

[0007] The above bimetal riveting structure uses a riveting sleeve on the electrical connection terminal to pass through an installation through-hole of the bimetal component, and through stamping and riveting, a circular flange is formed at the upper end of the riveting sleeve that abuts against the outer peripheral edge of the installation through-hole, thereby clamping the bimetal component between the circular flange and the electrical connection terminal. This is beneficial for increasing the contact area at the riveting part of the bimetal component, being applicable to bimetal components with a smaller width dimension on the premise of ensuring the riveting strength, saving materials, and having relatively high riveting stability.

[0008] In some embodiments of the present utility model, an anti-deviation structure is provided between the bimetal component and the electrical connection terminal.

[0009] In some embodiments of the present utility model, the anti-deviation structure includes a positioning groove and a positioning convex portion that matches the positioning groove. A plastic body is provided on the electrical connection terminal. One of the positioning convex portion and the positioning groove is provided at the end of the bimetal component close to the installation through-hole, and the other is provided on the plastic body.

[0010] In some embodiments of the present utility model, the positioning groove is composed of two L-shaped notches formed on the end of the bimetal component in opposite directions, and the positioning convex portion is composed of two rectangular protrusions formed on the plastic body in opposite directions. Two adjacent side walls of the rectangular protrusion abut against two side walls of the L-shaped notch.

[0011] In some embodiments of the present utility model, the installation through-hole is located at the middle position in the width direction of the bimetal component.

[0012] In some embodiments of the present utility model, the contour shapes of the installation through-hole and the riveting sleeve are both circular, and the outer peripheral wall of the riveting sleeve is expanded and tightened against the inner peripheral wall of the installation through-hole.

[0013] In some embodiments of the present utility model, the electrical connection terminal is composed of a metal plate, and the riveting sleeve is formed by stamping from the metal plate. The thickness dimension of the metal plate is a, and the wall thickness dimension of the riveting sleeve is b, satisfying: 0.15mm ≤ b ≤ a.

[0014] In some embodiments of the present utility model, the circular flange is circular, and the dimension that the circular flange extends radially along the installation through-hole is c, and the wall thickness dimension of the riveting sleeve is b, satisfying: 1.5b ≤ c ≤ 5b.

[0015] In some embodiments of the present utility model, the inner diameter dimension of the installation through-hole is d, and the width dimension of the bimetal component is e, satisfying: 0.2e ≤ d ≤ 0.8e.

[0016] A temperature controller according to a second aspect embodiment of the present utility model includes the bimetal riveting structure of any of the above technical solutions. The temperature controller utilizes the upper end of the riveting sleeve to form an annular flanging that abuts against the outer peripheral edge of the installation through hole, which is beneficial to increasing the contact area at the riveting part of the bimetal component, applicable to bimetal with a smaller width dimension on the premise of ensuring the riveting strength, and ensuring the service life of the miniaturized temperature controller.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 FIG. is a schematic structural diagram of an embodiment of a temperature controller adopting the bimetal riveting structure of the present utility model;

[0020] Figure 2 is Figure 1 Schematic exploded view of the structure of the embodiment;

[0021] Figure 3 is Figure 1 A cross-sectional view of the embodiment;

[0022] Figure 4 is Figure 3 Partial enlarged view of part A of;

[0023] Figure 5 is a cross-sectional view along the width direction of the bimetal component when the power connection terminal and the bimetal component are combined.

[0024] Reference numerals:

[0025] Power connection terminal 100; Riveting sleeve 110; Annular flanging 120; Bimetal component 200; Installation through hole 210; Positioning groove 310; Positioning protrusion 320; Plastic main body 400. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0027] In the description of the present utility model, it should be understood that when it comes to orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, while understandings such as "above", "below", "within", etc. include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] See Figures 1 to 3 , a riveting structure of a bimetallic sheet of the present utility model includes: a power connection terminal 100 and a bimetallic sheet assembly 200. The power connection terminal 100 is formed with a riveting sleeve 110 extending vertically upward. The bimetallic sheet assembly 200 is provided with an installation through hole 210. The riveting sleeve 110 passes through the installation through hole 210. An annular flange 120 located on the outer periphery of the installation through hole 210 is formed at the upper end of the riveting sleeve 110. The annular flange 120 and the power connection terminal 100 jointly clamp the bimetallic sheet assembly 200. Among them, the bimetallic sheet assembly 200 includes a bimetallic sheet and a conductive elastic sheet stacked above the bimetallic sheet. When the bimetallic sheet is heated and deformed, it can push up the conductive elastic sheet to disconnect the connection between this power connection terminal 100 and another power connection terminal 100.

[0031] The above bimetal riveting structure uses a riveting sleeve 110 on the electrical connection terminal 100 to pass through an installation through hole 210 of the bimetal component 200, and through stamping and riveting, a circular flange 120 that abuts against the outer peripheral edge of the installation through hole 210 is formed at the upper end of the riveting sleeve 110, thereby clamping the bimetal component 200 between the circular flange 120 and the electrical connection terminal 100. This is beneficial to increasing the contact area at the riveting part of the bimetal component 200, being applicable to bimetals with relatively small width dimensions while ensuring the riveting strength, saving materials, and having relatively high riveting stability.

[0032] See Figure 1 and Figure 2 In some embodiments of the present utility model, in order to prevent the bimetal component 200 from deflecting relative to the electrical connection terminal 100 and ensure that the bimetal component 200 can stably contact the conductive elastic piece to cut off the power when heated and deformed, an anti-deviation structure is provided between the bimetal component 200 and the electrical connection terminal 100.

[0033] See Figure 1 and Figure 2 In some embodiments of the present utility model, the anti-deviation structure includes a positioning groove 310 and a positioning protrusion 320 that matches the positioning groove 310. A plastic main body 400 is provided on the electrical connection terminal 100. One of the positioning protrusion 320 and the positioning groove 310 is provided at the end of the bimetal component 200 close to the installation through hole 210, and the other is provided on the plastic main body 400. It should be noted that the riveting sleeve 110 and the installation through hole 210 mostly adopt circular structures, and the riveting sleeve 110 is prone to rotate relative to the installation through hole 210. When the positioning protrusion 320 and the positioning groove 310 are provided, regardless of the shapes of the riveting sleeve 110 and the installation through hole 210, even when the upper end of the riveting sleeve 110 is stamped to form the circular flange 120 and has a tendency to drive the bimetal component 200 to deflect relative to the electrical connection terminal 100, the cooperation of the positioning protrusion 320 and the positioning groove 310 can prevent this situation from occurring and play a positioning role during the process of stamping the circular flange 120 on the riveting sleeve 110. Of course, in some embodiments, when the outer peripheral edge shapes of the riveting sleeve 110 and the installation through hole 210 are triangular or rectangular, the combination of the riveting sleeve 110 and the installation through hole 210 itself forms an anti-deviation structure.

[0034] See Figure 1 and Figure 2, in some embodiments of the present utility model, the positioning groove 310 is composed of two L-shaped notches formed on the end of the bimetal sheet assembly 200 in opposite directions, and the positioning convex portion 320 is composed of two rectangular protrusions formed on the plastic main body 400 relatively. Two adjacent side walls of the rectangular protrusion abut against two side walls of the L-shaped notch. The L-shaped notch can be formed only when stamping and cutting the bimetal sheet assembly 200, which is easy to manufacture. The rectangular protrusion is formed during injection molding. The combination of the rectangular protrusion and the L-shaped notch is easy for manual or mechanical placement of the bimetal sheet assembly 200 in place, facilitating assembly. In addition, it should be noted that a general temperature control switch is provided with two power connection terminals 100 arranged at intervals, and the plastic main body 400 is injection-molded to wrap a part of the two power connection ends to fix the relative positions of the two power connection ends.

[0035] See Figure 1 , Figure 2 and Figure 5 , in some embodiments of the present utility model, the mounting through hole 210 is located at the middle position in the width direction of the bimetal sheet assembly 200, which helps the active layer of the bimetal sheet to swing in the up and down direction when heated and deformed, effectively preventing the bimetal sheet from twisting in other directions. Moreover, since the mounting through hole 210 is located at the middle position in the width direction of the bimetal sheet assembly 200, the two L-shaped notches are symmetrically arranged about the center of the mounting through hole 210, which plays a role in preventing misassembly during manual assembly.

[0036] See Figures 1 to 3 , in some embodiments of the present utility model, the mounting through hole 210 and the riveting sleeve 110 are both circular in contour shape, and the outer peripheral wall of the riveting sleeve 110 is expanded and tightened against the inner peripheral wall of the mounting through hole 210, effectively increasing the contact area between the riveting sleeve 110 and the mounting through hole 210, and improving the structural strength of the riveting of the power connection terminal 100 and the bimetal sheet assembly 200.

[0037] See Figure 4 , in some embodiments of the present utility model, the power connection terminal 100 is composed of a metal plate, and the riveting sleeve 110 is formed by stamping from the metal plate. The thickness dimension of the metal plate is a, and the wall thickness dimension of the riveting sleeve 110 is b, satisfying: 0.15mm ≤ b ≤ a. Through experiments, when the wall thickness dimension of the riveting sleeve 110 and the thickness dimension of the metal plate satisfy the above relationship, a stable annular flanging 120 can be formed at the upper end of the riveting sleeve 110, which is also beneficial for the riveting equipment to process the riveting sleeve 110.

[0038] See Figure 4, in some embodiments of the present utility model, in order to ensure the clamping effect of the annular flange 120 on the bimetal component 200, the annular flange 120 is in a circular ring shape, and the dimension of the annular flange 120 extending along the radial direction of the mounting through hole 210 is c, and the wall thickness dimension of the riveting sleeve 110 is b, satisfying: 1.5b ≤ c ≤ 5b.

[0039] See Figure 5 , in some embodiments of the present utility model, the inner diameter dimension of the mounting through hole 210 is d, and the width dimension of the bimetal component 200 is e, satisfying: 0.2e ≤ d ≤ 0.8e. Among them, the inner diameter dimension of the mounting through hole 210 is adapted to the outer diameter dimension of the riveting sleeve 110. Through experiments, when the above conditions are met, the structural strength of the riveting of the power connection terminal 100 and the bimetal component 200 is relatively high.

[0040] See Figure 1 , a temperature controller according to an embodiment of the second aspect of the present utility model includes the bimetal riveting structure of any of the above technical solutions. This temperature controller utilizes the annular flange 120 formed at the upper end of the riveting sleeve 110 to abut against the outer peripheral edge of the mounting through hole 210, which is beneficial to increasing the contact area at the riveting part of the bimetal component 200, and is applicable to bimetals with a relatively small width dimension on the premise of ensuring the riveting strength, so as to ensure the service life of the miniaturized temperature controller.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0042] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A bimetallic strip riveting structure, characterized in that, Comprising: An electric connection terminal (100) and a bimetallic sheet assembly (200), wherein the electric connection terminal (100) is formed with a riveting sleeve (110) extending vertically upward, the bimetallic sheet assembly (200) is provided with an installation through hole (210), the riveting sleeve (110) passes through the installation through hole (210), an annular flange (120) is formed at the upper end of the riveting sleeve (110) and located on the outer periphery of the installation through hole (210), and the annular flange (120) and the electric connection terminal (100) jointly clamp the bimetallic sheet assembly (200).

2. A bimetallic sheet riveting structure according to claim 1, characterized in that: An anti-deviation structure is provided between the bimetallic sheet assembly (200) and the electric connection terminal (100).

3. A bimetallic sheet riveting structure according to claim 2, characterized in that: The anti-deviation structure includes a positioning groove (310) and a positioning convex portion (320) matching the positioning groove (310). A plastic main body (400) is provided on the electric connection terminal (100). One of the positioning convex portion (320) and the positioning groove (310) is provided at the end of the bimetallic sheet assembly (200) close to the installation through hole (210), and the other is provided on the plastic main body (400).

4. A bimetallic sheet riveting structure according to claim 3, characterized in that: The positioning groove (310) is composed of two L-shaped notches formed on the end of the bimetallic sheet assembly (200) back to back. The positioning convex portion (320) is composed of two rectangular protrusions formed on the plastic main body (400) opposite to each other. The two adjacent side walls of the rectangular protrusion abut against the two side walls of the L-shaped notch.

5. A bimetallic sheet riveting structure according to claim 4, characterized in that: The installation through hole (210) is located at the middle position in the width direction of the bimetallic sheet assembly (200).

6. A bimetallic sheet riveting structure according to claim 1, characterized in that: The profiles of the installation through hole (210) and the riveting sleeve (110) are both circular, and the outer peripheral wall of the riveting sleeve (110) is tightened against the inner peripheral wall of the installation through hole (210).

7. A bimetallic sheet riveting structure according to claim 6, characterized in that: The electric connection terminal (100) is composed of a metal plate, the riveting sleeve (110) is stamped from the metal plate, the thickness dimension of the metal plate is a, and the wall thickness dimension of the riveting sleeve (110) is b, satisfying: 0.15mm ≤ b ≤ a.

8. A bimetallic sheet riveting structure according to claim 6, characterized in that: The annular flange (120) is circular, the dimension of the annular flange (120) extending along the radial direction of the installation through hole (210) is c, and the wall thickness dimension of the riveting sleeve (110) is b, satisfying: 1.5b ≤ c ≤ 5b.

9. A bimetallic sheet riveting structure according to claim 6, characterized in that: The inner diameter dimension of the installation through hole (210) is d, and the width dimension of the bimetal sheet assembly (200) is e, satisfying: 0.2e ≤ d ≤ 0.8e.

10. A temperature controller, characterized in that, It includes the bimetal riveting structure according to any one of claims 1-9.

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