Flat plate type fuse

Abstract

The utility model provides a flat plate type fuse. The flat plate type fuse comprises an upper seat body, a lower seat body and an electrode copper sheet fixed between the upper seat body and the lower seat body, a first surface and a second surface are arranged on the side edge of the upper seat body, and a third surface and a fourth surface are arranged on the side edge of the lower seat body; the first surface and the third surface are welding surfaces, and the second surface and the fourth surface are welding surfaces; the upper seat body and the lower seat body are fixed in a face-to-face ultrasonic welding manner; the edges of the seat body are welded face to face, so that the structural stability of the seat body is enhanced, and the bearing capacity of the seat body to torsion is improved.

Description

Technical Field

[0001] The utility model relates to a fuse, in particular to a flat fuse. Background Art

[0002] The flat fuse is a device used for overload protection in a circuit. In existing various flat fuses, a small section of low-temperature fusing metal is arranged between two oppositely arranged electrode copper sheets 101, and then an upper seat body 102 and a lower seat body 103 are overlapped and welded and fixed, so as to wrap and fix the opposite ends of the two electrode copper sheets 101 and the low-temperature fusing metal.

[0003] Such as Figure 1-2 , in the design of the traditional flat fuse seat body, the welding and fixing structure between the upper seat body and the lower seat body usually adopts the method of arranging four welding posts 104 on the lower seat body and four fixing holes 105 at the corresponding positions of the upper seat body. During welding, the welding posts of the lower seat body pass through the fixing holes of the upper seat body to form a welding cooperation position 106 to be welded, and welding and fixing are carried out at this welding cooperation position.

[0004] In the design of the traditional flat fuse seat body, the main disadvantages include:

[0005] 1. Operational complexity: During the welding process, it is necessary to accurately align the welding posts of the lower seat body with the fixing holes of the upper seat body, which increases the difficulty of operation and the requirements for the skills of the operators.

[0006] 2. Structural fragility: As a key part connecting the upper and lower seat bodies, the fine structure of the welding posts is easily affected by thermal stress and breaks during the welding process, resulting in connection failure.

[0007] 3. Insufficient strength: Due to the limitations of the design of the welding posts and the welding method, the structural strength of the entire fuse seat body may not be sufficient to withstand large mechanical torques or pressures. Summary of the Utility Model

[0008] In order to overcome these disadvantages, the utility model provides a flat fuse, which enhances the structural stability of the seat body and improves the torque-bearing capacity of the seat body by performing face-to-face welding at the edge of the seat body.

[0009] In order to solve the above technical problems, the utility model provides a flat fuse, including an upper seat body, a lower seat body, and electrode copper sheets fixed between the upper seat body and the lower seat body;

[0010] A first surface and a second surface are arranged on the side edge of the upper seat body, and a third surface and a fourth surface are arranged on the side edge of the lower seat body; the first surface and the third surface are mutually welding surfaces, and the second surface and the fourth surface are mutually welding surfaces;

[0011] The upper seat body and the lower seat body are fixed by ultrasonic welding face to face.

[0012] In a preferred embodiment, the first surface and the second surface are arranged to form a first stepped surface up and down along the side edge of the upper seat body; the fourth surface and the third surface are arranged to form a second stepped surface up and down along the side edge of the lower seat body;

[0013] The first stepped surface and the second stepped surface match each other.

[0014] In a preferred embodiment, two sets of first stepped surfaces are arranged oppositely along the two side edges of the upper seat body; two sets of second stepped surfaces are arranged oppositely along the two side edges of the lower seat body.

[0015] In a preferred embodiment, table surfaces are provided at both ends of the lower seat body, and the table surfaces are used for placing electrode copper sheets.

[0016] In a preferred embodiment, lower limit posts and lower limit holes are provided on the table surface; upper limit holes and upper limit posts are provided at corresponding positions of the upper seat body;

[0017] The lower limit posts are inserted into the upper limit holes, and the upper limit posts are inserted into the lower limit holes.

[0018] In a preferred embodiment, the electrode copper sheet is provided with insertion holes at positions corresponding to the upper limit posts and the lower limit posts.

[0019] In a preferred embodiment, the fourth surface is higher than the table surface, and a side contact surface is connected between the fourth surface and the table surface, and the height of the side contact surface is set to H.

[0020] In a preferred embodiment, the third surface is lower than the table surface, and a convex platform protrudes from the third surface on the table surface.

[0021] In a preferred embodiment, the thickness of the electrode copper sheet is set to 0.5 - 0.7 mm.

[0022] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0023] 1. By arranging the mutually matching first surface and the third surface, and the second surface and the fourth surface between the upper and lower seat bodies, and fixing them by ultrasonic welding face to face at the edge of the seat body, the structural stability of the seat body is enhanced, the torque-bearing capacity of the seat body is improved, and thus the problems of structural fragility and fracture caused by the traditional welding method are reduced.

[0024] 2. By using ultrasonic welding to fix the edge surfaces of the upper seat body and the lower seat body, the risk of shaking and falling off is reduced, and the reliability of the product is improved.

[0025] 3. The design of the stepped surface makes the matching between the upper seat body and the lower seat body more precise, improving the tightness and durability of the overall structure. At the same time, the contact area between the copper sheet and the side of the seat body increases, enhancing the installation strength of the finished product and ensuring the stability of the circuit. Description of the Drawings

[0026] Figure 1 is the welding and fixing structure of the fuse seat body in the prior art;

[0027] Figure 2 is the structure diagram of the fuse seat body in the prior art;

[0028] Figure 3 is the exploded view of the structure of the fuse in the preferred embodiment of the present invention;

[0029] Figure 4 is the mating diagram of the upper seat body and the lower seat body in the preferred embodiment of the present invention;

[0030] Figure 5 is the structure diagram of the lower seat body in the preferred embodiment of the present invention;

[0031] Figure 6 is the assembly diagram of the electrode copper sheet and the seat body in the preferred embodiment of the present invention;

[0032] Figure 7 is the overall assembly diagram of the fuse in the preferred embodiment of the present invention.

[0033] Description of the reference numerals: 1, upper seat body; 11, first surface; 12, second surface; 13, first stepped surface; 2, lower seat body; 21, third surface; 22, fourth surface; 23, second stepped surface; 24, table surface; 25, lower limit post; 26, lower limit hole; 27, side contact surface; 28, boss; 3, electrode copper sheet; 31, jack. Detailed Embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. 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. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted 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. 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.

[0037] Reference Figure 3 , Figure 7 Referring to

[0038] Reference Figure 4 , this embodiment provides a flat fuse, which includes an upper seat body 1, a lower seat body 2, and an electrode copper sheet 3 fixed between the upper seat body 1 and the lower seat body 2. The side edge of the upper seat body 1 is provided with a first surface 11 and a second surface 12, and the side edge of the lower seat body 2 is provided with a third surface 21 and a fourth surface 22. The third surfaces 21 are welding surfaces with each other, and the second surfaces 12 and the fourth surfaces 22 are welding surfaces with each other.

[0039] The first surface 11 and the second surface 12 are arranged on the side edge of the upper seat body 1 in the form of a first step surface 13 formed up and down, and the fourth surface 22 and the third surface 21 are arranged on the side edge of the lower seat body 2 in the form of a second step surface 23 formed up and down. The first step surface 13 and the second step surface 23 match each other. The design of the step surface makes the matching between the upper seat body 1 and the lower seat body 2 more precise, improving the tightness and durability of the overall structure.

[0040] Reference Figure 5, on both sides of the upper seat body 1, two groups of first stepped surfaces 13 are oppositely arranged, and on both sides of the lower seat body 2, two groups of second stepped surfaces 23 are oppositely arranged, achieving precise matching and fixation. The matching stepped surface settings of the upper seat body 1 and the lower seat body 2 can increase the versatility of the upper and lower seat bodies 2.

[0041] Reference Figure 6 , the installation of the electrode copper sheet 3 is that at both ends of the lower seat body 2, there is a table surface 24, and this table surface 24 is used to place the electrode copper sheet 3, ensuring the stability and contact effect of the electrode copper sheet 3. The limiting structure of the electrode copper sheet 3 is that on this table surface 24, a lower limiting post 25 and a lower limiting hole 26 are arranged, and at the corresponding positions of the upper seat body 1, an upper limiting hole and an upper limiting post are arranged. The upper limiting hole is inserted into the lower limiting post 25, and the lower limiting hole 26 is inserted into the upper limiting post. The limiting holes and limiting posts of the upper and lower seat bodies 2 are mutually matched. At the position of the electrode copper sheet 3 corresponding to the limiting post, there is an insertion hole 31. Through the cooperation of the insertion hole 31, the limiting post and the limiting hole, it is convenient for installation and fixation, improving the accuracy and firmness of the assembly. The thickness of the electrode copper sheet 3 is controlled within 0.5 - 0.7 mm, ensuring good electrical conductivity and mechanical strength.

[0042] In this embodiment, the fourth surface 22 is higher than the table surface 24, and a side contact surface 27 is connected between the fourth surface 22 and the table surface 24. The height of the side contact surface 27 is set as H. Through the setting of the side contact surface 27 with a certain height, the contact area between the copper sheet and the side of the seat body is increased, preventing the electrode copper sheet 3 from deforming, enhancing the installation strength of the finished product, and ensuring the stability of the circuit.

[0043] In this embodiment, the third surface 21 is lower than the table surface 24, and a boss 28 protrudes from the third surface 21. The end face of the boss 28 is the table surface 24, which is used to place the electrode copper sheet 3. The setting of the boss 28 plays a blocking role, which can enhance the fixing strength between the upper seat body 1 and the lower seat body 2. The boss 28 can play a positioning role in the installation of the upper seat body 1 and the lower seat body 2, preventing the electrode copper sheet 3 from deforming.

[0044] The above is only a preferred specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, making non-substantive modifications to the present invention using this concept, shall fall within the scope of infringement of the present invention.

Claims

1. A flat-type fuse, characterized in that: It includes an upper seat body, a lower seat body and an electrode copper sheet fixed between the upper seat body and the lower seat body; The side edge of the upper seat body is provided with a first surface and a second surface, and the side edge of the lower seat body is provided with a third surface and a fourth surface; the first surface and the third surface are mutually welded surfaces, and the second surface and the fourth surface are mutually welded surfaces; The upper seat body and the lower seat body are fixed by face-to-face ultrasonic welding.

2. A flat-type fuse according to claim 1, characterized in that: The first surface and the second surface are arranged on the side edge of the upper seat body to form a first step surface; the fourth surface and the third surface are arranged on the side edge of the lower seat body to form a second step surface; The first step surface and the second step surface match each other.

3. A flat-type fuse according to claim 2, characterized in that: Two sets of first step surfaces are arranged oppositely on both side edges of the upper seat body; and two sets of second step surfaces are arranged oppositely on both side edges of the lower seat body.

4. A flat-type fuse according to claim 1, characterized in that: Tables are arranged at both ends of the lower seat body, and the table is used for placing electrode copper sheets.

5. A flat-type fuse according to claim 4, characterized in that: A lower limit post and a lower limit hole are arranged on the table top; an upper limit hole and an upper limit post are arranged at corresponding positions of the upper seat body; The lower limit post is inserted into the upper limit hole, and the upper limit post is inserted into the lower limit hole.

6. A flat-type fuse according to claim 5, characterized in that: The electrode copper sheet is provided with plug holes at positions corresponding to the upper limit post and the lower limit post.

7. A flat-type fuse according to claim 4, characterized in that: The fourth surface is higher than the table top, and a side contact surface is provided between the fourth surface and the table top, and a height of the side contact surface is set to H.

8. A flat-type fuse according to claim 7, characterized in that: The third surface is lower than the table top, and the table top is provided with a boss protruding from the third surface.

9. The flat-type fuse according to claim 1, characterized in that: The thickness of the electrode copper sheet is set to 0.5-0.7 mm.

Images