Fuse body structure of fuse and fuse

Abstract

The utility model discloses a fuse body structure of a fuse and the fuse, a fuse body comprises a first fuse body part, a middle narrow neck part and a second fuse body part which are sequentially connected into a whole in the X-axis direction; in the X-axis direction, the length of the middle narrow neck part is smaller than that of the first melt part and that of the second melt part, in the Y-axis direction, the thickness of the middle narrow neck part is smaller than that of the first melt part and that of the second melt part, and in the Z-axis direction, the width of the middle narrow neck part is smaller than that of the first melt part and that of the second melt part; and the two ends of the middle narrow neck part are respectively connected to the middle of the end parts of the first melt part and the second melt part. Therefore, it is ensured that the fuse has a small I2T value under the condition of large rated current.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a fuse body structure and a fuse. Background Art

[0002] A fuse, also known as a fuse, is an electrical appliance that uses the heat generated by itself to melt the fuse and disconnect the circuit to protect itself when the current exceeds the specified value.

[0003] In the field of server power supply, fuses are often required to work with circuit breakers and disconnect the circuit earlier than the circuit breaker. 2 The T value (the maximum energy that the fuse can withstand, also known as the melting value) should be smaller than the circuit breaker I 2 T value, and the steady-state current of the circuit where the fuse is located is often large (generally above 30A), and the existing fuse structure is often difficult to meet the requirements.

[0004] In view of this, the utility model provides a fuse structure for solving the above-mentioned problem. Utility Model Content

[0005] The utility model aims to provide a fuse structure and a fuse which can have a smaller I under the condition of having a larger rated current. 2 T value has the advantages of simple structure and strong applicability.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A fuse structure of a fuse, the fuse comprising a first melt portion, a middle narrow neck portion and a second melt portion, the three being connected in sequence as a whole in the X-axis direction; in the Y-axis direction, the thickness of the middle narrow neck portion is smaller than the thickness of the first melt portion and the second melt portion, and in the Z-axis direction, the width of the middle narrow neck portion is smaller than the width of the first melt portion and the second melt portion; the two ends of the middle narrow neck portion are respectively connected to the middle of the ends of the first melt portion and the second melt portion.

[0008] Furthermore, the thickness of the first melt portion and the second melt portion is N times the thickness of the middle narrow neck portion, where N is a natural number greater than 1.

[0009] Furthermore, the thickness of the first melt portion and the second melt portion is 2N times the thickness of the middle narrow neck portion, where N is a natural number greater than 0.

[0010] Furthermore, the first melt portion of the melt is formed by folding a first rectangular sheet; the second melt portion of the melt is formed by folding a second rectangular sheet; in the Y-axis direction, the thickness of the first rectangular sheet and the second rectangular sheet is the same as the thickness of the middle narrow neck.

[0011] Furthermore, the first rectangular piece, the second rectangular piece and the middle narrow neck are formed by stamping or laser cutting.

[0012] Furthermore, the fuse is in the shape of a hollow tube; the thickness of the first melt portion and the second melt portion in the Y-axis direction and the width in the Z-axis direction are not greater than the inner diameter of the fuse.

[0013] Furthermore, in the X-axis direction, the length of the middle narrow neck portion is smaller than the length of the first melt portion and the length of the second melt portion.

[0014] The utility model also provides a fuse, comprising the fuse structure.

[0015] After adopting the above technical solution, there is a middle narrow neck in the middle of the melt, and the cross-sectional area of ​​the middle narrow neck is significantly smaller than the cross-sectional area of ​​the first melt part and the second melt part. Therefore, the I 2 T is small, and at the same time, the volume and surface area of ​​the first melt part and the second melt part are significantly larger than the volume and surface area of ​​the middle narrow neck, which can improve the heat dissipation efficiency at both ends of the melt, thereby ensuring that the current that can pass through the melt is large, that is, the fuse can have a larger rated current.

[0016] Specifically, the increase in the volume of the first melt portion and the second melt portion can increase the amount of heat that the melt can absorb, and the increase in the surface area can increase the heat dissipation efficiency, thereby reducing the resistance of the melt (reducing the heat generation), thereby maintaining the cross-sectional area of ​​the middle narrow neck unchanged (i.e., product I 2 T unchanged), increase the rated current of the product to meet the customer's requirements for product I 2 Requirements on T. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a melt according to an embodiment of the present utility model;

[0018] Figure 2 This is a stereoscopic diagram of an embodiment of the utility model before melt processing;

[0019] Figure 3 This is a front view of a fuse according to an embodiment of the utility model;

[0020] Figure 4 This is a cross-sectional view of a fuse according to an embodiment of the utility model (I);

[0021] Figure 5 This is a cross-sectional view (II) of a fuse according to an embodiment of the present utility model.

[0022] Explanation of reference numerals: melt 10 , first melt portion 1 , middle narrow neck portion 2 , second melt portion 3 , first rectangular sheet 4 , second rectangular sheet 5 , fold 6 , copper cap 20 , fuse 100 . DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] like Figures 1 to 5 As shown, a fuse structure of the utility model is provided, wherein the fuse 10 comprises a first fuse part 1, a middle narrow neck part 2 and a second fuse part 3, which are sequentially connected as a whole in the X-axis direction.

[0025] See also Figure 1 In the X-axis direction, the length of the middle narrow neck portion 2 may be smaller than the lengths of the first melt portion 1 and the second melt portion 3 , and the length of the middle narrow diameter portion 2 may refer to the length of the narrow diameter in the prior art.

[0026] In the Y-axis direction, the thickness of the middle narrow neck portion 2 is smaller than the thickness of the first melt portion 1 and the second melt portion 3 (see Figure 4 ), in the Z-axis direction, the width of the middle narrow neck portion 2 is smaller than the width of the first melt portion 1 and the second melt portion 3 (see Figure 5 ); The two ends of the middle narrow neck portion 2 are respectively connected to the middle of the end portions of the first melt portion 1 and the second melt portion 3.

[0027] Thus, the melt 10 has a middle narrow neck 2 in the middle, and the cross-sectional area of ​​the middle narrow neck 2 is significantly smaller than the cross-sectional areas of the first melt portion 1 and the second melt portion 3, so that the product I can be ensured. 2 T is small, and at the same time, the volume and surface area of ​​the first melt part 1 and the second melt part 3 are significantly larger than the volume and surface area of ​​the middle narrow neck 2, which can improve the heat dissipation efficiency at both ends of the melt 10, thereby ensuring that the current that can pass through the melt 10 is large, that is, the fuse can have a larger rated current.

[0028] Specifically, the increase in the volume of the first melt portion 1 and the second melt portion 3 can increase the amount of heat that the melt 10 can absorb, and the increase in the surface area can increase the heat dissipation efficiency, thereby reducing the resistance of the melt 10 (reducing the heat generation), so that the cross-sectional area of ​​the middle narrow neck 2 remains unchanged (i.e., the product I 2 When T remains unchanged), increase the rated current of the product.

[0029] This embodiment provides a production process, see Figure 2 , stamping or laser cutting can be used to form the outer dimensions of the melt 10, specifically, a first rectangular piece 4, a second rectangular piece 5 and the middle narrow neck 2 can be processed. Then, in the Y-axis direction, the thickness of the first rectangular piece 4 and the second rectangular piece 5 must be the same as the thickness of the middle narrow neck 2, and the first melt portion 1 of the melt 10 can be folded by the first rectangular piece 4; the second melt portion 3 of the melt 10 can also be folded by the second rectangular piece 5.

[0030] Thus, the production of the product can be facilitated, and the thickness of the first melt portion 1 and the second melt portion 3 is definitely greater than the thickness of the middle narrow neck portion 2. The thickness of the folded first melt portion 1 and the second melt portion 3 is N times the thickness of the middle narrow neck portion 2, where N is a natural number greater than 1.

[0031] Specific as Figure 2 , in the actual production process:

[0032] First, a first rectangular sheet 4, a second rectangular sheet 5 and a middle narrow neck portion 2 are sequentially connected by stamping or laser cutting; the parameters of the first rectangular sheet 4 and the second rectangular sheet 5 described in the figure may be 8 mm in length, 0.15 mm in thickness and 3.36 mm in width, while the parameters of the middle narrow neck portion 2 may be 3 mm in length, 0.15 mm in thickness and 0.2 mm in width.

[0033] Next, a fold 6 is printed in the center of the first rectangular sheet 4 and the second rectangular sheet 5, and then the first rectangular sheet 4 is folded along the fold 6 to obtain the first melt portion 1, and the second rectangular sheet 5 is folded along the fold 6 to obtain the second melt portion 3; Figure 1 The thickness of the folded first melt portion 1 and the second melt portion 3 is twice the thickness of the middle narrow neck portion 2 (folded once); correspondingly, the length of the first melt portion 1 and the second melt portion 3 are both 8 mm, the thickness is 0.3 mm, and the width is 1.68 mm; the parameters of the middle narrow neck portion 2 remain unchanged, and are still 3 mm in length, 0.15 mm in thickness, and 0.2 mm in width.

[0034] Finally, see Figures 3 to 5 The melt 10 is welded to the copper caps 20 at both ends of the fuse 100 according to the normal process to complete the finished product of the fuse 100.

[0035] Experiments have shown that the rated current of a conventional fuse 100 product with a narrow neck having a cross-sectional area of ​​0.15 mm*0.2 mm is about 10A-26A, while the rated current of the fuse 100 is about 40A after adopting the above solution, which greatly improves the rated current of the fuse 100 .

[0036] In this embodiment, if a sequential winding and folding method is adopted, after folding N times, the thickness of the first melt portion 1 and the second melt portion 3 is N times the thickness of the middle narrow neck portion 2, where N is a natural number greater than 1.

[0037] If the rectangular sheet is folded once and then folded again in the center, and the folding is repeated in this way, then after folding N times, the thickness of the first melt portion 1 and the second melt portion 3 is 2N times the thickness of the middle narrow neck portion 2, where N is a natural number greater than 0.

[0038] In this embodiment, the thickness of the first melt portion 1 and the second melt portion 3 obtained by folding must be greater than the thickness of the middle narrow neck portion 2, and is N times. Of course, this does not mean that the production method of the melt 10 is limited to this, as long as the processing technology can make the thickness of the first melt portion 1 and the second melt portion 3 greater than the middle narrow neck portion 2.

[0039] Another example Figure 3 As shown, a fuse 100 of the utility model adopts a hollow tubular structure as an example, and cooperates with the above-mentioned fuse 10 structure. In order to increase the rated current, it is necessary to increase the volume of the first fuse part 1 and the second fuse part 3, and ensure that the thickness of the first fuse part 1 and the second fuse part 3 in the Y-axis direction and the width in the Z-axis direction are not greater than the inner diameter of the fuse 100.

[0040] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0041] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does 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 application.

[0042] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0043] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0044] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. A fuse structure, characterized in that: The melt includes a first melt portion, a middle narrow neck portion and a second melt portion, which are connected in sequence as a whole in the X-axis direction; in the Y-axis direction, the thickness of the middle narrow neck portion is smaller than the thickness of the first melt portion and the second melt portion, and in the Z-axis direction, the width of the middle narrow neck portion is smaller than the width of the first melt portion and the second melt portion; the two ends of the middle narrow neck portion are respectively connected to the middle of the ends of the first melt portion and the second melt portion.

2. The fuse structure of a fuse according to claim 1, characterized in that: The thickness of the first melt portion and the second melt portion is N times the thickness of the middle narrow neck portion, where N is a natural number greater than 1.

3. The fuse structure of a fuse according to claim 1, characterized in that: The thickness of the first melt portion and the second melt portion is 2N times the thickness of the middle narrow neck portion, where N is a natural number greater than 0.

4. A fuse structure according to claim 2 or 3, characterized in that: The first melt portion of the melt is formed by folding a first rectangular sheet; the second melt portion of the melt is formed by folding a second rectangular sheet; in the Y-axis direction, the thickness of the first rectangular sheet and the second rectangular sheet is the same as the thickness of the middle narrow neck.

5. The fuse structure of a fuse according to claim 4, characterized in that: The first rectangular piece, the second rectangular piece and the middle narrow neck are formed by stamping or laser cutting.

6. The fuse structure of a fuse according to claim 5, characterized in that: The fuse is in the shape of a hollow tube; the thickness of the first melt part and the second melt part in the Y-axis direction and the width in the Z-axis direction are not greater than the inner diameter of the fuse.

7. The fuse structure of a fuse according to claim 1, characterized in that: In the X-axis direction, the length of the middle narrow neck portion is smaller than the length of the first melt portion and the length of the second melt portion.

8. A fuse, characterized in that: The melt structure comprises the melt structure according to any one of claims 1 to 7.

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