Ceramic fuse

Abstract

The utility model belongs to the technical field of electronic components, and particularly relates to a ceramic fuse which comprises a ceramic base, a base contact terminal, a contact knife and a shell. And a positioning circular hole is formed in the ceramic base. The base contact terminal comprises a conductive contact terminal, a conductive elastic sheet, an elastic supporting sheet and a fixing bolt. An elastic clamping groove is formed between the two conductive elastic pieces, the width of the elastic clamping groove is smaller than the thickness of the contact knife, and the contact knife is arranged in the elastic clamping groove. Fixing holes are formed in the ends, extending out of the ceramic base, of the conductive contact terminals. And leading-in grooves are formed in the tops of the two conductive elastic sheets. The contact knife comprises a contact knife body and a contact knife guide head. According to the ceramic fuse provided by the utility model, the ceramic base is provided with the positioning circular hole, the ceramic base can be installed in the distribution box through the positioning circular hole, and the ceramic fuse provided by the invention is smaller in size and can be conveniently installed in the distribution box, so that the installation limitation of the fuse is smaller, and the applicability is higher.

Description

Technical Field

[0001] This utility model belongs to the field of electronic components technology, and in particular relates to a ceramic fuse. Background Technology

[0002] A fuse is an overcurrent protection device. A fuse mainly consists of a housing, terminals, a fusible element, and an external arc-quenching medium. In use, the fuse is connected in series in the protected circuit. When the current in the protected circuit exceeds a specified value, and after a certain period of time, due to overcurrent heating (current heating effect), the accumulated heat inside the fuse causes the fusible element to reach the melting point of the metal material, causing it to melt and break the circuit, thus providing protection. It has an inverse time-delay characteristic; when the overload current is small, the melting time is long; when the overload current is large, the melting time is short. Therefore, within a certain overload current range, the fuse will not melt until the current returns to normal, and it can continue to be used.

[0003] As a safety electrical appliance, fuses are generally installed in distribution boxes. However, due to the limited space in distribution boxes, and the need to install other electrical appliances in the distribution box, existing fuses are too large to be convenient to install in distribution boxes, resulting in significant limitations in fuse installation and low applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a ceramic fuse, which aims to solve the technical problem that existing fuses are large in size, inconvenient to install in distribution boxes, resulting in limited installation and low applicability.

[0005] To achieve the above objectives, the ceramic fuse provided in this utility model embodiment includes a ceramic base, a base contact terminal, a contact blade, and a housing. The base contact terminal is connected to the top side of the ceramic base, one end of the contact blade is connected to the housing, and the other end is elastically pressed against the base contact terminal.

[0006] The ceramic base is provided with positioning holes;

[0007] The base contact terminal includes a conductive contact terminal, a conductive spring, an elastic support plate, and a fixing bolt. One end of the conductive contact terminal is connected to the conductive spring, and the other end extends out of the ceramic base. There are two conductive springs, which are arranged in parallel and opposite to each other. Both conductive springs are connected to the ceramic base, and an elastic groove is formed between the two conductive springs. The width of the elastic groove is less than the thickness of the contact blade. The contact blade is disposed in the elastic groove and presses against the two conductive springs respectively. One end of the elastic support plate is connected to the ceramic base, and the other end is connected to the conductive spring. The end of the conductive contact terminal extending out of the ceramic base has a fixing hole, and the fixing bolt passes through the fixing hole.

[0008] As an optional solution of this utility model, two positioning holes are provided, and the two positioning holes are spaced apart.

[0009] As an optional solution of this utility model, the elastic support sheet is C-shaped and forms an elastic support groove, and the conductive elastic sheet is disposed in the elastic support groove.

[0010] As an optional solution of this utility model, the tops of the two conductive springs form an inlet groove, the inlet groove is flared and its width gradually decreases from bottom to top, and the inlet groove is connected to the elastic slot.

[0011] As an optional embodiment of this utility model, the base contact terminals are provided in two parallel and opposite positions, and both are fixedly connected to the ceramic base.

[0012] As an optional embodiment of this utility model, the number of contact blades is the same as the number of contact terminals of the base, and there are two contact blades, the material of which is copper-zinc alloy.

[0013] As an optional solution of this utility model, the contact blade includes a contact blade body and a contact blade guide. One end of the contact blade guide is fixedly connected to the contact blade body, and the other end is arranged in a V-shape. The contact blade guide and the contact blade body are sequentially inserted into the elastic slot.

[0014] The ceramic fuse provided in this embodiment of the present invention has at least one of the following technical effects:

[0015] The ceramic fuse provided in this application includes a ceramic base, base contact terminals, contact blades, and a housing. The ceramic base is provided with a positioning hole, through which the ceramic base can be installed in a distribution box. The ceramic fuse provided in this application is smaller in size and easier to install in a distribution box, thus reducing the limitations of fuse installation and increasing its applicability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a ceramic fuse provided for an embodiment of this utility model.

[0018] Figure 2 A schematic diagram of the structure of the base contact terminal of the ceramic fuse provided in this embodiment of the utility model.

[0019] Figure 3 A schematic diagram of the contact blade and housing of the ceramic fuse provided in this embodiment of the utility model.

[0020] The following are the labeling elements in the figure:

[0021] 1. Ceramic base; 2. Base contact terminal; 3. Contact blade; 4. Housing;

[0022] 11. Positioning round hole;

[0023] 21. Conductive contact terminal; 22. Conductive spring; 23. Elastic support piece; 24. Fixing bolt; 25. Elastic slot; 26. Guide groove;

[0024] 31. Touch knife body; 32. Touch knife guide head. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] In one embodiment of this utility model, such as Figures 1-3 As shown, a ceramic fuse is provided, including a ceramic base 1, a base contact terminal 2, a contact blade 3, and a housing 4. The base contact terminal 2 is fixedly connected to the top side of the ceramic base 1, one end of the contact blade 3 is fixedly connected to the housing 4, and the other end is elastically pressed against the base contact terminal 2.

[0030] The ceramic base 1 is provided with a positioning hole 11, through which the ceramic base 1 can be installed in the distribution box.

[0031] The base contact terminal 2 includes a conductive contact terminal 21, a conductive spring 22, an elastic support piece 23, and a fixing bolt 24. One end of the conductive contact terminal 21 is fixedly connected to the conductive spring 22, and the other end extends out of the ceramic base 1. There are two conductive springs 22, which are arranged in parallel opposite directions. Both conductive springs 22 are fixedly connected to the ceramic base 1, and an elastic groove 25 is formed between the two conductive springs 22. The width of the elastic groove 25 is less than the thickness of the contact blade 3. The contact blade 3 is disposed in the elastic groove 25 and makes pressure contact with the two conductive springs 22 respectively. Under normal conditions, the contact 3 remains in continuous contact with the conductive spring 22, ensuring normal power supply. When the wire is short-circuited or the wire temperature rises significantly due to excessive power, the wire will transfer heat to the conductive contact terminal 21 and the conductive spring 22. The conductive spring 22 then transfers heat to the contact 3. When the temperature reaches the melting point of the contact 3, the contact 3 will gradually melt until it is no longer in contact with the conductive spring 22. At this point, the wire remains disconnected from the contact 3, thus breaking the circuit and preventing the wire from burning due to overheating, improving safety. One end of the elastic support piece 23 is fixedly connected to the ceramic base 1, and the other end is fixedly connected to the conductive spring 22. The elastic support piece 23 provides elastic support for the conductive spring 22, ensuring continuous contact between the conductive spring 22 and the contact 3 and maintaining normal power supply. The conductive contact terminal 21 has a fixing hole at its end extending from the ceramic base 1, through which a fixing bolt 24 passes. By setting the fixing bolt 24, it is easy to fix the wire to the conductive contact terminal 21, forming a power-carrying circuit.

[0032] In another embodiment of this utility model, the ceramic fuse has two positioning holes 11, which are spaced apart.

[0033] In another embodiment of the present invention, the elastic support piece 23 of the ceramic fuse is C-shaped and forms an elastic support groove, and the conductive spring piece 22 is disposed in the elastic support groove.

[0034] In another embodiment of this utility model, the tops of the two conductive spring contacts 22 of the ceramic fuse form guide grooves 26. The guide grooves 26 are funnel-shaped and gradually decrease in width from bottom to top. The guide grooves 26 are connected to the elastic retaining grooves 25. The contact blades 3 are sequentially inserted into the guide grooves 26 and the elastic retaining grooves 25.

[0035] In another embodiment of this utility model, the ceramic fuse has two base contact terminals 2, which are arranged in parallel opposite directions and are both fixedly connected to the ceramic base 1.

[0036] In another embodiment of this utility model, the number of contacts 3 of the ceramic fuse is the same as the number of contacts 2 of the base. There are two contacts 3, and the material of the contacts 3 is copper-zinc alloy. The use of copper-zinc alloy is not only due to its excellent electrical and thermal conductivity, but also because it can quickly melt and break the circuit when the current is too high or the temperature is too high, thereby cutting off the current and protecting other components in the circuit from damage.

[0037] In another embodiment of this utility model, the contact 3 of the ceramic fuse includes a contact body 31 and a contact guide 32. One end of the contact guide 32 is fixedly connected to the contact body 31, and the other end is V-shaped. The contact guide 32 and the contact body 31 are sequentially inserted into the elastic slot 25. The contact 3 is sequentially inserted into the guide groove 26 and the elastic slot 25 through the contact guide 32.

[0038] The ceramic fuse provided in this application has a positioning hole 11 on the ceramic base 1. The ceramic base 1 can be installed in the distribution box through the positioning hole 11. The ceramic fuse provided in this application is smaller in size and easier to install in the distribution box, thus reducing the limitations of fuse installation and increasing its applicability.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ceramic fuse, characterized by, The application relates to a ceramic base, a base contact terminal, a contact blade and a shell, wherein the base contact terminal is connected to the top side of the ceramic base, one end of the contact blade is connected with the shell, and the other end is elastically pressed with the base contact terminal; a positioning round hole is arranged on the ceramic base; the base contact terminal comprises a conductive contact terminal, a conductive elastic sheet, an elastic supporting sheet and a fixing bolt, one end of the conductive contact terminal is connected with the conductive elastic sheet, the other end of the conductive contact terminal extends out of the ceramic base, the conductive elastic sheet is provided with two and is arranged in parallel, the two conductive elastic sheets are connected with the ceramic base, an elastic clamping groove is formed between the two conductive elastic sheets, the width of the elastic clamping groove is smaller than the thickness of the contact blade, the contact blade is arranged in the elastic clamping groove and is in pressure contact with the two conductive elastic sheets respectively, one end of the elastic supporting sheet is connected with the ceramic base, the other end of the elastic supporting sheet is connected with the conductive elastic sheet, the end of the conductive contact terminal extending out of the ceramic base is provided with a fixing hole, and the fixing bolt is arranged in the fixing hole. The positioning round hole is provided with two, and the two positioning round holes are arranged at intervals. The elastic supporting sheet is arranged in a C type and forms an elastic supporting groove, and the conductive elastic sheet is arranged in the elastic supporting groove.

2. A ceramic fuse according to claim 1, characterized in that The top of the two conductive elastic sheets forms an inlet groove, the inlet groove is in a horn type, the width of the inlet groove gradually decreases from bottom to top, and the inlet groove is communicated with the elastic clamping groove.

3. A ceramic fuse according to claim 1, wherein The base contact terminal is provided with two, the two base contact terminals are arranged in parallel, and the two base contact terminals are fixedly connected with the ceramic base.

4. A ceramic fuse according to claim 1, wherein The number of the contact blades is the same as that of the base contact terminals, the contact blades are provided with two, and the material of the contact blades is copper-zinc alloy.

5. A ceramic fuse according to claim 1, wherein The contact blade comprises a contact blade body and a contact blade guide head, one end of the contact blade guide head is fixedly connected with the contact blade body, the other end of the contact blade guide head is arranged in a V type, and the contact blade guide head and the contact blade body are sequentially inserted into the elastic clamping groove.

6. A ceramic fuse according to claim 1, wherein ​ 7. A ceramic fuse according to claim 1, wherein ​

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