Lantern ring device for small-current 10A and below coil end part

Abstract

The utility model provides a lantern ring device for small-current 10A and below coil end parts, which comprises a thin coil, the thin coil comprises a first fixed end and a second fixed end, and the first fixed end and the second fixed end are respectively connected with a connecting piece; the lantern ring device comprises a metal thin-wall lantern ring which is located between the thin coil and the connecting piece, arranged on the first fixing end and the second fixing end in a sleeving mode and connected with the connecting piece. The metal thin-wall lantern ring is in clearance fit with the first fixing end and the second fixing end. The metal thin-wall lantern ring is additionally arranged at the end part of the thin coil, so that the reliability and the service life of the assembly are improved, the product performance of the miniature circuit breaker switch is improved, and the production can be implemented only by subsequently adding a metal thin-wall lantern ring fastening process under the condition of not changing the original production process; the thin-wall sleeve is ensured to be tightly attached to the end of the thin coil through the clearance fit technology, and good stability is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of miniature circuit breaker switch, in particular to a sleeve device for the end of a small current coil of 10A or less. BACKGROUND

[0002] In the field of household appliances, industrial equipment, new energy vehicles, etc., small current coils of 10A or less are often used. The diameter of the wire is very small, the smallest being less than 0.05mm, making it very difficult to connect, weld and rivet the coil. Process problems such as broken connection wire and severely deformed end often occur. In the existing connection technology, terminal connection is mainly used, which mainly includes crimping and welding methods.

[0003] Crimping is to place the bare end of the wire into the sleeve as a connecting medium, and then use a tool to apply pressure to tighten the connection. Crimping usually requires selecting the appropriate sleeve, otherwise the sleeve will cause connection defects, reduced conductivity and reduced strength. Small current coils have a diameter of less than φ1.0, making it difficult to match and select the appropriate sleeve. Even if the appropriate size of the sleeve is found, subsequent processing under the small diameter of the sleeve will cause the process problem of difficult tightening.

[0004] In addition to the difficulty in crimping, thin coils also face difficulties in welding and riveting. In miniature circuit breaker switches, small current coils with a diameter of less than φ1.0 cannot be separated from welding technology. Welding provides excellent performance, including high strength, high conductivity, low resistance, high reliability, and the ability to withstand high temperatures. However, welding has the characteristic of high technical requirements, especially in the miniature circuit breaker switch, welding small current coils of 10A or less requires higher precision. The initial current of the welding is too small, which easily causes the welding site to be "undercooked", resulting in poor conduction; the welding pressure is too large, which causes the wire end to be pressed too flat, the wire diameter changes too much, and the current intensity after welding decreases.

[0005] Patent CN104624869A discloses an L-shaped welding process of resistance wire and high-temperature wire, which is carried out according to the following steps:

[0006] Step one, clean the surface of the resistance wire and the high-temperature wire, and scrub the metal sleeve clean;

[0007] Step two, put the resistance wire and the high-temperature wire into the metal sleeve, and place the resistance wire, the high-temperature wire and the metal sleeve on the same end surface to form a welding surface;

[0008] Step three, fix the resistance wire, the high-temperature wire and the metal sleeve by clamping the metal sleeve;

[0009] Step four, weld the welding surface to weld the resistance wire, the high-temperature wire and the metal sleeve together;

[0010] Step five, after welding, high temperature coil and metal sleeve fastening.

[0011] The patent technology first puts the resistance wire and high temperature wire into the metal sleeve, and then realizes fastening by clamping the metal sleeve, but this process does not change the problem of thin coil end part being thin and low in strength. For complex connecting parts, the appearance is different, and there is a problem of low practicability.

[0012] There is an urgent need for a new design to improve the difficult situation of small current coil in crimping, welding and riveting, to solve the problems of easy breakage, low strength and high cost of the existing small current coil end part in the connection process, and to improve the strength reliability of the connection. Content of the utility model

[0013] In view of the defects in the prior art, the purpose of the present application is to provide a sleeve ring device for the end part of a small current coil of 10A and below, to solve the problems of easy breakage and low strength of the end part of the thin coil in crimping, welding and riveting in a small circuit breaker, and to realize reliable connection of the thin coil and the connecting part.

[0014] In one aspect of the present application, a sleeve ring device for the end part of a small current coil of 10A and below is provided, comprising a thin coil, the thin coil comprising a first fixed end and a second fixed end, the first fixed end and the second fixed end being connected with a connecting part respectively;

[0015] The sleeve ring device comprises a metal thin-walled sleeve ring located between the coil and the connecting part, sleeved on the first fixed end and the second fixed end, and connected with the connecting part.

[0016] The metal thin-walled sleeve ring is in clearance fit with the first fixed end and the second fixed end.

[0017] Further, the metal thin-walled sleeve ring is a pure copper thin-walled sleeve ring or a pure aluminum thin-walled sleeve ring.

[0018] Further, the thin coil is a pure copper thin coil, a copper-clad aluminum thin coil or a pure aluminum thin coil.

[0019] Further, the thickness of the metal sleeve ring is less than the diameter of the thin coil.

[0020] The thickness of the metal thin-walled sleeve ring accounts for 10%-50% of the diameter of the thin coil.

[0021] Further, the connecting part is a copper alloy connecting part, a red copper connecting part, an iron connecting part or a complex copper steel connecting part.

[0022] Further, the metal thin-walled sleeve ring and the first fixed end and the second fixed end are fixedly connected by welding, riveting and crimping.

[0023] Compared with the prior art, the application has at least one of the following beneficial effects:

[0024] 1. The metal thin-wall sleeve ring is added to the first fixed end and the second fixed end of the thin coil, the reliability and service life of the assembly are improved, the product performance of the small circuit breaker switch is improved, the original production process is not changed, only the fastening metal thin-wall sleeve process is added subsequently, production can be implemented, the metal thin-wall sleeve ring is tightly attached to the end of the thin coil through the gap fitting process, and good stability is achieved.

[0025] 2. The metal thin-wall sleeve ring of the application has simple processing procedures, is easy to mass-produce, is suitable for wide promotion and use, reduces the welding process difficulty and the product labor cost, and the material layer of the thin-wall metal sleeve ring does not contain toxic elements, and the corner scraps can be recycled and reused as a base material. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other features, objects and advantages of the application will become more apparent through reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 is a schematic view of the connection of the metal thin-wall sleeve ring, the thin coil and the connecting piece in an embodiment of the application.

[0028] Figure 2 is a cross-sectional schematic view of the metal thin-wall sleeve ring arranged on the thin coil in an embodiment of the application.

[0029] Figure 3 is a welding schematic view of the end of the NS2-25 small current 10A coil with a diameter less than φ1.0 in an embodiment of the application.

[0030] In the figure: 1, metal thin-wall sleeve ring; 2, thin coil; 21, first fixed end; 22, second fixed end; 3, connecting piece. DETAILED DESCRIPTION

[0031] The application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that, for those skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made. These all belong to the protection scope of the application.

[0032] It should be understood that the terms "first", "second", etc. in the following embodiments are used to distinguish different objects, rather than to describe a specific order. The terms "include" and "contain" used indicate the presence of the described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0033] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the application. The drawings of the embodiments are only for the convenience of explaining the technical content of the application, and the technical features such as the numbers, positions of parts, mutual relationship between parts and size of parts used in the optimal implementation do not constitute a limitation on the technical solution itself. In the description of the specification, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the application.

[0034] Referring to Figure 1 As shown in the figure, it is a sleeve device for small current 10A and below coil end of an embodiment of the application, which comprises a fine coil 2, the fine coil 2 comprises a first fixed end 21 and a second fixed end 22, the first fixed end 21 and the second fixed end 22 are connected with a connecting piece 3 respectively.

[0035] The sleeve device comprises a metal thin-walled sleeve 1, which is located between the fine coil 2 and the connecting piece 3, and is sleeved on the first fixed end 21 and the second fixed end 22, and is connected with the connecting piece 3; the metal thin-walled sleeve 1 is in clearance fit with the first fixed end 21 and the second fixed end 22.

[0036] The application increases the metal thin-walled sleeve 1 at the first fixed end 21 and the second fixed end 22 of the fine coil 2, improves the reliability and service life of the assembly, and improves the product performance of the small circuit breaker switch. Without changing the original production process, only the process of fastening the metal thin-walled sleeve 1 is added subsequently, the production can be implemented, and the metal thin-walled sleeve 1 is tightly attached to the end of the fine coil 2 through the clearance fit process, which has good stability.

[0037] Preferably, the metal thin-wall sleeve ring 1 is a pure copper thin-wall sleeve ring or a pure aluminum thin-wall sleeve ring. The fine coil 2 is a pure copper fine coil, a copper-clad aluminum fine coil or a pure aluminum fine coil, the thickness of the metal thin-wall sleeve ring 1 is less than the diameter of the fine coil 2; the thickness of the metal thin-wall sleeve ring 1 accounts for 10%-50% of the diameter of the fine coil 2. The connecting piece 3 is a copper alloy connecting piece, a red copper connecting piece, an iron connecting piece or a copper steel connecting piece. The metal thin-wall sleeve ring 1 is fixedly connected with the first fixed end 21 and the second fixed end 22 through welding, riveting and pressure connection.

[0038] In an embodiment of the present application, the diameter of the fine coil 2 is 1 mm, the metal thin-wall sleeve ring 1 has good electrical conductivity and good plasticity, and has a certain strength, a small current diameter of the fine coil 2 and the connecting piece 3.

[0039] The metal thin-wall sleeve ring 1 is sleeved on the first fixed end 21 and the second fixed end 22 of the fine coil 2, the metal thin-wall sleeve ring 1 has a thickness of 0.1-0.5 mm, and any one of copper material and aluminum material with certain strength and good welding performance can be selected. The above-mentioned "good welding performance" refers to high strength, high electrical conductivity, low resistance, high reliability and the ability to withstand high temperature. Under normal circumstances, different materials are selected to meet the performance requirements according to different welding, riveting and pressure connection process requirements, for example, different material sleeve ring combinations of different models of small circuit breaker switches (10A and below), NS2-25 (10A and below) and the like.

[0040] Referring to FIGS. 1-3, Figure 1 and 2 The embodiment provides a metal thin-wall sleeve ring 1 for a small current coil end of a small circuit breaker switch (10A and below), the connecting piece 3 and the metal thin-wall sleeve ring 1 in the figure are mainly made of copper material, and the welding position is between the metal thin-wall sleeve ring 1 made of copper material and the connecting piece 3 made of copper material. The metal thin-wall sleeve ring 1 made of copper material is arranged on the small current fine coil 2 made of copper material, and the metal thin-wall sleeve ring 1 made of copper material and the connecting piece 3 made of copper material are welded. The sleeve thickness is 0.1 mm, the small current fine coil 2 has a diameter of 1 mm, and accounts for 1% of the diameter of the small current fine coil 2.

[0041] The metal thin-wall sleeve ring 1 of the small current coil used in the embodiment realizes reliable connection of the fine coil 2 and the connecting piece 3 made of copper material, and the welding point has physical properties of high strength, high reliability and the ability to withstand high temperature, and electrical properties of high electrical conductivity and low resistance. Through testing, the welding point with the metal thin-wall sleeve ring 1 has better performance changes in tensile strength, resistivity and melting temperature of the welding point.

[0042] Referring to FIGS. 1-3, Figure 3As shown, the embodiment provides a metal thin-wall sleeve 1 for a small current coil of NS2-25 (10A and below), and the connecting member 3 and the metal thin-wall sleeve 1 are mainly made of aluminum material. The welding part is mainly made of aluminum material between the metal thin-wall sleeve 1 and the connecting member 3. The metal thin-wall sleeve 1 made of aluminum material is arranged on the small current thin coil 2, and the metal thin-wall sleeve 1 made of aluminum material and the connecting member 3 are welded. The thickness of the metal thin-wall sleeve 1 is 0.1mm, which accounts for 1% of the diameter of the small current thin coil 2, and the diameter of the small current coil is 1mm.

[0043] The metal thin-wall sleeve 1 for the small current coil is used in the embodiment, and reliable connection of the thin coil 2 and the connecting member 3 is achieved. The welding point has physical properties of high strength, high reliability and high temperature resistance, and electrical properties of high conductivity and low resistance. The tensile strength, resistivity and melting temperature of the welded point with the sleeve are all changed to have better performance.

[0044] The specific embodiments of the application are described above. It should be understood that the application is not limited to the specific embodiments described above, and various modifications or changes can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the application. The above preferred features can be combined in any way without conflict.

Claims

1. A coil end collar device for small current 10A and below, comprising a fine coil, the fine coil comprising a first fixed end and a second fixed end, the first fixed end and the second fixed end are connected with a connector, characterized in that, The loop device comprises: a metal thin-wall loop sleeved on the first fixed end and the second fixed end, located between the fine loop and the connecting piece, and connected with the connecting piece; The metal thin-wall loop is in clearance fit with the first fixed end and the second fixed end.

2. A collar device for the end of a small current 10A and below coil according to claim 1, characterized in that, The metal thin-wall loop is a pure copper thin-wall loop or a pure aluminum thin-wall loop.

3. A collar device for small current 10A and below coil end according to claim 1, characterized in that, The fine loop is a pure copper fine loop, a copper-clad aluminum fine loop or a pure aluminum fine loop.

4. A collar device for small current 10A and below coil end according to claim 1, characterized in that, The thickness of the metal loop is less than the diameter of the fine loop; The thickness of the metal thin-wall loop accounts for 10%-50% of the diameter of the fine loop.

5. A collar device for small current 10A and below coil end according to claim 1, characterized in that, The connecting piece is a copper alloy connecting piece, a red copper connecting piece, an iron connecting piece or a complex copper steel connecting piece.

6. A collar device for small current 10A and below coil end according to claim 1, characterized in that, The metal thin-wall loop is fixedly connected with the first fixed end and the second fixed end through welding, riveting and pressure connection.

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