Time-delay fuse structure

Abstract

The utility model belongs to the technical field of electronic components, and particularly relates to a time-delay fuse structure, which comprises an insulating substrate, an insulating base, a base contact terminal, a melt and an insulating shell. The insulating base is connected to the insulating substrate. The base contact terminal comprises a contact terminal substrate and a contact terminal elastic sheet, and the contact terminal elastic sheet is in crimping contact with the melt. The two contact terminal elastic sheets are arranged at intervals to form an elastic interval, and the width of the elastic interval is smaller than the diameter of the melt. According to the time-delay fuse structure provided by the utility model, when a circuit is short-circuited and the temperature rises, the melt is slowly melted, and because the width of the elastic distance between the contact terminal elastic sheets is smaller than the diameter of the melt, the contact terminal elastic sheets can continuously press and contact the melt and delay to disconnect the melt, so that the fuse structure provided by the invention is simple in overall structure, and the production and replacement cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electronic components technical field especially relates to a time delay fuse structure. BACKGROUND

[0002] The fuse is a kind of overcurrent protector. Fuse is mainly composed of shell, terminal, fuse body and additional filler etc. When using, fuse is connected in series in the protected circuit, when the current of the protected circuit exceeds the specified value, and after a certain time, due to overcurrent heating (current thermal effect), the accumulation of heat in the fuse, the internal fuse body reaches the melting point of metal material, the fuse body melts, and the circuit is disconnected, thereby playing a protective role. It has anti-time delay characteristic, when overload current is small, the melting time is long, when overload current is large, the melting time is short. Therefore, within a certain overload current range, when the current returns to normal, the fuse will not melt, and can continue to be used. Fuse is mainly composed of shell and safety tube, and the safety tube is the key element to control the melting characteristic.

[0003] The existing time delay fuse structure is relatively complex, the production cost is high, and the replacement cost is increased after replacing a new fuse when the fuse is burnt out. INVENTION CONTENTS

[0004] The utility model discloses a time delay fuse structure, which aims to solve the technical problems of the complex fuse structure in the prior art, high production cost, and high replacement cost caused by replacing a new fuse when the fuse is burnt out.

[0005] To achieve the above-mentioned purpose, the time delay fuse structure provided by the embodiments of the utility model comprises an insulating substrate, an insulating base, a base contact terminal, a fuse body and an insulating shell, the insulating base is connected to the insulating substrate, the base contact terminal is arranged between the insulating base and the fuse body, one end of the base contact terminal is connected to the insulating base, and the other end is in contact with the fuse body, and the insulating shell is installed on the outside of the fuse body.

[0006] The base contact terminal comprises a contact terminal substrate and a contact terminal spring, the contact terminal substrate is arranged between the insulating base and the contact terminal spring, and is connected to the insulating base and the contact terminal spring respectively, and the contact terminal spring is in pressure contact with the fuse body, the contact terminal spring is provided with two and is arranged at intervals to form an elastic spacing, and the width of the elastic spacing is less than the diameter of the fuse body.

[0007] As an optional scheme of the utility model, a fixing bolt is arranged between the insulating substrate and the insulating base, the fixing bolt is sequentially fixed and penetrated in the insulating substrate and the insulating base, and the insulating substrate and the insulating base are fixedly connected through the fixing bolt.

[0008] As optional scheme of the utility model, the base contact terminal is equipped with two, and all are connected with the melt pressure contact.

[0009] As optional scheme of the utility model, the insulating base is equipped with two, one insulating base corresponds to connect one base contact terminal, the insulating base includes insulating base body and convex ring, the insulating base body is fixedly connected with the insulating substrate, the convex ring is equipped with multiple, and is uniformly fixedly connected in the insulating base body.

[0010] As optional scheme of the utility model, the contact terminal substrate is fixedly connected with the elastic support sheet, the elastic support sheet is arranged on the contact terminal spring sheet outside, the elastic support sheet is arranged in C type, and one end is abutted with the contact terminal spring sheet, the elastic support sheet is equipped with two, and is parallelly arranged.

[0011] As optional scheme of the utility model, the material of the melt is copper-zinc alloy.

[0012] As optional scheme of the utility model, one end of the contact terminal substrate is stretched out in the insulating base, and is fixedly provided with a positioning bolt.

[0013] As optional scheme of the utility model, the material of the insulating substrate, insulating base and insulating shell is ceramic.

[0014] The technical scheme provided by the delay fuse structure in the embodiment of the utility model has one or more of the following technical effects:

[0015] The delay fuse structure provided by the application includes an insulating substrate, an insulating base, a base contact terminal, a melt and an insulating shell, the base contact terminal includes a contact terminal substrate and a contact terminal spring sheet, when the circuit is short-circuited and heated, the melt is slowly melted, because the width of the elastic spacing between the contact terminal spring sheets is smaller than the diameter of the melt, the contact terminal spring sheets continuously press and contact the melt, and the melt is disconnected, the fuse structure provided by the application has a simple overall structure, and the production and replacement costs are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the drawings without paying creative labor.

[0017] Fig. 1 It is a side view of the delay fuse structure provided by the embodiment of the utility model.

[0018] Fig. 2 A three-dimensional diagram of the time-delay fuse structure provided in an embodiment of the present utility model.

[0019] Fig. 3 A three-dimensional diagram of the time-delay fuse structure provided in an embodiment of the present utility model.

[0020] Among them, the reference numerals in the figures are:

[0021] 1. Insulating substrate; 2. Insulating base; 3. Base contact terminal; 4. Melt; 5. Insulating shell;

[0022] 21. Insulating base body; 22. Raised ring;

[0023] 31. Contact terminal substrate; 32. Contact terminal spring clip; 33. Elastic support sheet; 34. Positioning bolt. DETAILED DESCRIPTION

[0024] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the 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 present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] In an embodiment of the present application, as shown in Figs. 1-3 The delay fuse structure comprises an insulating base plate 1, an insulating base 2, a base contact terminal 3, a fuse body 4 and an insulating shell 5. The insulating base 2 is fixedly connected to the insulating base plate 1, the base contact terminal 3 is arranged between the insulating base 2 and the fuse body 4, one end of the base contact terminal 3 is fixedly connected to the insulating base 2, and the other end is in contact with the fuse body 4, and the insulating shell 5 is arranged on the outside of the fuse body 4.

[0029] The base contact terminal 3 comprises a contact terminal base plate 31 and a contact terminal spring 32. The contact terminal base plate 31 is arranged between the insulating base 2 and the contact terminal spring 32, and is fixedly connected to the insulating base 2 and the contact terminal spring 32, respectively. The contact terminal spring 32 is in pressure contact with the fuse body 4. The contact terminal spring 32 is provided with two and is arranged at intervals to form an elastic spacing, and the width of the elastic spacing is less than the diameter of the fuse body 4, so that the contact terminal spring 32 is in continuous pressure contact with the fuse body 4 until the fuse body 4 is melted to a diameter less than the elastic spacing, at which time the contact terminal spring 32 is disconnected from the fuse body 4 to form an open circuit, thereby protecting the circuit.

[0030] The delay fuse structure provided by the present application can slowly melt the fuse body 4 when the circuit is short-circuited and heated, and the width of the elastic spacing between the contact terminal springs 32 is less than the diameter of the fuse body 4, so that the contact terminal springs 32 are in continuous pressure contact with the fuse body 4, and the fuse body 4 is disconnected in time. The fuse structure provided by the present application has a simple overall structure, and the production and replacement costs are reduced.

[0031] In another embodiment of the present application, the delay fuse structure is provided with a fixing bolt between the insulating base plate 1 and the insulating base 2, the fixing bolt is sequentially fixedly connected to the insulating base plate 1 and the insulating base 2, and the insulating base plate 1 and the insulating base 2 are fixedly connected through the fixing bolt.

[0032] In another embodiment of the present application, the delay fuse structure is provided with two base contact terminals 3, and each is in pressure contact with the fuse body 4.

[0033] In another embodiment of the utility model, the insulating base 2 of the time delay fuse structure is provided with two, one insulating base 2 is connected with one base contact terminal 3, the insulating base 2 includes insulating base body 21 and convex ring 22, the insulating base body 21 is fixedly connected with the insulating substrate 1, the convex ring 22 is provided with multiple and is fixedly connected on the insulating base body 21 evenly. The convex ring 22 can increase the heat dissipation area, and improve the heat dissipation efficiency.

[0034] In another embodiment of the utility model, the contact terminal substrate 31 of the time delay fuse structure is fixedly connected with elastic support sheet 33, the elastic support sheet 33 is arranged outside the contact terminal spring 32, the elastic support sheet 33 is arranged in C type, and one end is in abutment with the contact terminal spring 32, the elastic support sheet 33 is provided with two and is arranged in parallel. The elastic support sheet 33 has the elastic support effect to the contact terminal spring 32, guarantees that the contact terminal spring 32 is in continuous pressure contact with the fuse 4, until the fuse 4 is melted to the diameter less than the elastic spacing, at this time, the contact terminal spring 32 is disconnected with the fuse 4.

[0035] In another embodiment of the utility model, the material of the fuse 4 of the time delay fuse structure is copper-zinc alloy, the use of copper-zinc alloy not only because of its excellent conductivity and thermal conductivity, but also because it can be quickly fused when the current is too large or the temperature is too high, thereby cutting off the current, protecting other components in the circuit from being damaged.

[0036] In another embodiment of the utility model, one end of the contact terminal substrate 31 of the time delay fuse structure is stretched out of the insulating base 2, facilitating the connection of the wire, and the positioning bolt 34 is fixedly arranged on the contact terminal substrate 31.

[0037] In another embodiment of the utility model, the material of the insulating substrate 1, the insulating base 2 and the insulating shell 5 of the time delay fuse structure is ceramic, which has good insulation and heat insulation effect.

[0038] The time delay fuse structure provided by the application, when the circuit is short-circuited and heated, the fuse 4 is slowly melted, and because the width of the elastic spacing between the contact terminal springs 32 is less than the diameter of the fuse 4, the contact terminal springs 32 will continuously press and contact the fuse 4, and the fuse 4 is disconnected, the fuse structure provided by the application has a simple overall structure, and the production and replacement costs are reduced.

[0039] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A time-delay fuse structure, characterized in that: The device comprises an insulating substrate, an insulating base, a base contact terminal, a melt and an insulating shell, wherein the insulating base is connected to the insulating substrate, the base contact terminal is arranged between the insulating base and the melt, one end of the base contact terminal is connected to the insulating base, and the other end is installed in contact with the melt, and the insulating shell is installed outside the melt; The base contact terminal includes a contact terminal substrate and a contact terminal spring clip. The contact terminal substrate is arranged between the insulating base and the contact terminal spring clip, and is connected to the insulating base and the contact terminal spring clip respectively. The contact terminal spring clip is in crimped contact with the melt; two contact terminal spring clips are provided and are arranged at intervals to form an elastic gap, and the width of the elastic gap is smaller than the diameter of the melt.

2. A time-delay fuse structure according to claim 1, characterized in that: A fixing bolt is provided between the insulating substrate and the insulating base. The fixing bolt is fixedly provided through the insulating substrate and the insulating base in sequence. The insulating substrate and the insulating base are fixedly connected through the fixing bolt.

3. The time-delay fuse structure according to claim 1, characterized in that: The base contact terminals are provided with two, and both are in pressure-connected contact with the melt.

4. A time-delay fuse structure according to claim 1, characterized in that: There are two insulating bases, one insulating base is connected to one base contact terminal, the insulating base includes an insulating base body and a convex ring, the insulating base body is fixedly connected to the insulating substrate, and there are multiple convex rings, which are evenly fixedly connected to the insulating base body.

5. The time-delay fuse structure according to claim 1, characterized in that: An elastic support piece is fixedly connected to the contact terminal substrate, and the elastic support piece is arranged outside the contact end spring piece. The elastic support piece is arranged in a C shape, and one end abuts against the contact end spring piece. There are two elastic support pieces, which are arranged parallel to each other.

6. The time-delay fuse structure according to claim 1, characterized in that: The material of the melt is copper-zinc alloy.

7. The time-delay fuse structure according to claim 1, characterized in that: One end of the contact terminal substrate extends out of the insulating base and is fixed with a positioning bolt.

8. The time-delay fuse structure according to claim 1, characterized in that: The insulating substrate, insulating base and insulating shell are all made of ceramic.

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