Novel plastic square SMD fuse convenient to assemble

Abstract

The utility model discloses a novel plastic square SMD fuse convenient to assemble, which comprises a base, a shell, a fusing element, electrodes and filler, the base comprises a base part and a bottom plate part which are integrally formed, the shell is clamped on the base part, the fusing element is arranged on the base part, the electrodes are arranged at two ends of the fusing element, and the filler is filled with the filler. An electrode is arranged on the base in a penetrating mode in the vertical direction, the electrode is a flat wire, and a closed space formed by the base and the shell is filled with filler. By means of the mode, the base is integrally formed, the material cost, the production cost and the production reject ratio are reduced, positioning and flatness of the electrodes can be guaranteed, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, and in particular to a new type of portable plastic square SMD fuse. Background Technology

[0002] The Chinese patent with patent number 201720447520.6 discloses a fuse and a switching power supply. Although the structure of a fuse in the first embodiment is an integrated type, the horizontal section of the pin is exposed, and it is difficult to ensure the flatness of the two horizontal sections. Since the fuse is mounted on the PCB board using SMD, the stability of the fuse of this structure is poor. The fuse in the second embodiment sets the bottom surface of the horizontal section of the pin as a plane. The fuse includes a gasket, and the bottom surface of the gasket is used as a reference to ensure that the bottom surfaces of the horizontal sections 22 of multiple pins are located on the same horizontal plane. Additional gaskets need to be processed, and production and assembly require two processings, which will increase material costs, production costs and production defect rates, and reduce production efficiency.

[0003] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a new type of portable plastic square SMD fuse. Contents of utility model

[0004] The main technical problem solved by the utility model is to provide a new type of portable plastic square SMD fuse with an integrated base, which reduces material cost, production cost and production defect rate, and can ensure the positioning and flatness of the electrode, thereby ensuring product quality.

[0005] To solve the above technical problems, a technical solution adopted by the utility model is: to provide a new type of portable plastic square SMD fuse, which includes a base, including an integrally formed base portion and a bottom plate portion, the base portion is provided with a base hole for inserting an electrode, the base hole is plum blossom-shaped or square, the bottom surface of the bottom plate portion is provided with a groove for accommodating the bent electrode, the base hole and the groove are connected, and a chamfer is provided at the connection between the base hole and the groove, so that the bent electrode can be flatly fitted into the groove;

[0006] A housing is snap-fitted onto the base;

[0007] A fuse element is disposed on the base;

[0008] Electrodes are installed at both ends of the fuse element and vertically penetrate the base, and the electrodes are flat wires;

[0009] The filler is filled in the enclosed space formed by the base and the shell.

[0010] Preferably, two bumps for supporting the fusing element are provided on the base portion, a U-shaped groove for facilitating the placement of the electrode is provided on the bump, and the base hole penetrates the U-shaped groove in the vertical direction.

[0011] Preferably, the outer shell is within the projected area of the bottom plate portion, and the bottom plate portion can cover the bottom of the outer shell when spreading around.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The original base and bottom plate are formed in one step. The production and assembly only need one processing, which can reduce the material cost, production cost and production defect rate, and effectively improve the production efficiency.

[0014] Before assembling the base and the electrode, it is flattened into a flat square to facilitate the flatness when forming the SMD fuse electrode.

[0015] The base hole is designed in a plum blossom shape or a square shape, with a chamfer design, and the base is provided with a groove for positioning the SMD fuse electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a new type of assembled and portable plastic square SMD fuse.

[0017] Figure 2 It is an expanded schematic structural diagram of a new type of assembled and portable plastic square SMD fuse.

[0018] Figure 3 It is a schematic structural diagram of the base of a new type of assembled and portable plastic square SMD fuse.

[0019] Among them, 1. Base, 11. Base portion, 12. Bottom plate portion, 13. Base hole, 14. Groove, 15. Chamfer, 2. Outer shell, 3. Fusing element, 4. Electrode, 5. Filler. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following describes the preferred embodiments of the present utility model in detail with reference to the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 3 , the embodiments of the present utility model include:

[0022] A new type of assembled and portable plastic square SMD fuse, which includes a base 1, a housing 2, a fusing element 3, electrodes 4, and a filler 5. The base 1 includes an integrally formed base portion 11 and a bottom plate portion 12. The housing 2 is snap-fitted on the base portion 11. The fusing element 3 is arranged on the base portion 11, and electrodes 4 are installed at both ends of the fusing element 3. The electrodes 4 penetrate the base 1 in the vertical direction. The electrodes 4 are made of flat wires. The closed space formed by the base 1 and the housing 2 is filled with the filler 5. A base hole 13 for passing through the electrodes is arranged on the base portion 11. The base hole 13 is in the shape of a plum blossom or a square. A groove 14 for accommodating the bent electrodes is opened on the bottom surface of the bottom plate portion 12. The base hole 13 and the groove 14 are communicated, and a chamfer 15 is provided at the connection of the base hole 13 and the groove 14 to facilitate the flat fitting of the bent electrodes into the groove 14.

[0023] Two convex blocks for supporting the fusing element 3 are arranged on the base portion 11. A U-shaped groove for facilitating the placement of the electrodes 4 is arranged on the convex blocks. The base hole 13 penetrates the U-shaped groove in the vertical direction.

[0024] The housing 2 is located within the projected area of the bottom plate portion 12, and the bottom plate portion 12 spreads around to cover the bottom of the housing 2.

[0025] When assembling the new type of assembled and portable plastic square SMD fuse of the present invention, the base portion 11 and the bottom plate portion 12 are integrally formed. Before assembling the base 1 and the electrodes 4, the round electrodes are first flattened into flat squares. The base hole 13 is designed in the shape of a plum blossom (or a square), and the hole outlet is designed with a chamfer 15. After the Fuse fuse is assembled and formed, the flat square electrodes are pressed flat into the preset groove 14 of the bottom plate portion 12, thus forming a new type of plastic square SMD product.

[0026] For the new type of assembled and portable plastic square SMD fuse of the present invention, the base is integrally formed, which reduces the material cost, production cost, and production defect rate, can ensure the positioning and flatness of the electrodes, and guarantee the product quality.

[0027] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A new type of portable plastic square SMD fuse, characterized by: include: The base (1) comprises an integrally formed base portion (11) and a bottom plate portion (12); the base portion (11) is provided with a base hole (13) for inserting an electrode, the base hole (13) is in a plum blossom shape or a square shape, the bottom surface of the bottom plate portion (12) is provided with a groove (14) for accommodating the bent electrode, the base hole (13) and the groove (14) are in communication, and a chamfer (15) is provided at the connection between the base hole (13) and the groove (14) to facilitate the flat fitting of the bent electrode into the groove (14); A housing (2) is snap-fitted onto the base (1); A fuse element (3) is arranged on the base (1); Electrodes (4) are installed at both ends of the fuse element (3) and are placed vertically through the base (1), and the electrodes (4) are flat wires; The filler (5) is filled in the closed space formed by the base (1) and the shell (2).

2. A novel portable plastic square SMD fuse according to claim 1, characterized in that: The base portion (11) is provided with two protrusions for supporting the fuse element (3), the protrusions are provided with U-shaped grooves for accommodating the electrodes (4), and the base hole (13) passes through the U-shaped grooves in a vertical direction.

3. A novel portable plastic square SMD fuse according to claim 1, characterized in that: The outer shell (2) is located within the projection area of ​​the bottom plate portion (12), and the bottom plate portion (12) spreads in all directions to cover the bottom of the outer shell (2).

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