A fuse with a foolproof structure

Abstract

This utility model discloses a fuse with a foolproof structure, including a base block. A placement groove is formed in the center of the upper surface of the base block, and triangular seats are fixedly connected to both sides of the upper surface of the base block. This foolproof fuse prevents the insertion of the fuse from the other end when the user attempts to insert the blade in reverse. The blade at the other end of the fuse cannot be inserted into the elastic element composed of the inclined, vertical, arc-shaped, and tilting blades. The blades are divided into two groups, both mounted on the outside of the sealing plate, and the two groups have different specifications. When the fuse is inserted in reverse, it cannot be inserted due to the incompatible blades, thus achieving a foolproof effect.

Description

Technical Field

[0001] This utility model relates to the field of fuses, specifically a fuse with a foolproof structure. Background Technology

[0002] As a key component in circuit protection, fuses are widely used in power, industrial control, home appliances, and new energy vehicles to cut off circuits in case of overload or short circuit, preventing equipment damage and safety accidents. However, existing fuses have many technical defects in practical use and urgently need improvement. Specifically, the shortcomings of existing technologies are mainly reflected in the following aspects:

[0003] Traditional fuses lack effective error prevention mechanisms, which can easily lead to user misoperation during installation. Fuses of different specifications (such as rated current and voltage) have similar appearances. If there is no anti-mixing structure, human negligence can easily lead to mismatch of specifications, causing the fuse to fail to operate at the predetermined threshold and reducing the reliability of circuit protection. Utility Model Content

[0004] The purpose of this invention is to provide a fuse with a foolproof structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A fuse with a foolproof structure includes a base block and a blade fuse plugged into the base block. The base block has a centrally located groove on its upper surface, and triangular seats are fixedly connected to both sides of the upper surface. An outward-facing flap is fixedly connected to the top of each triangular seat, a vertical piece is installed inside the outward-facing flap, an arc-shaped piece is fixedly connected to the top of the vertical piece, an inclined piece is fixedly connected to the end of the arc-shaped piece away from the vertical piece, and a pry bar is fixedly connected to the end of the inclined piece away from the arc-shaped piece. The triangular seats on the left and right sides are of different sizes.

[0007] As a further embodiment of this utility model: the curved piece is in a forward-curving shape, and there are two sets of curved pieces, with the two sets of curved pieces distributed in the same direction.

[0008] As a further improvement of this utility model: the bottom of the triangular base is flat, and an arc-shaped component is fixedly connected to the outer wall of the triangular base.

[0009] As a further improvement of this utility model: nut mounting grooves are provided on both the left and right sides of the upper surface of the placement groove, and threaded holes are provided at the opening of the nut mounting groove.

[0010] As a further embodiment of this utility model: fixing plates are fixedly connected to both the left and right sides of the base block, nuts are installed on the upper surface of the fixing plates, and bolts are threadedly connected to the axial center of the nuts.

[0011] As a further improvement of this utility model: the blade fuse is installed at the opening of the placement groove, and sealing plates are fixedly connected to both ends of the blade fuse.

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

[0013] In this invention, after the fuse is pressed down, the blade will slide downwards at the arc-shaped part. Because the inclined plate, vertical plate, arc-shaped plate, and tilting plate are designed to form an elastic element, when the user inserts the fuse in reverse, the blade at the other end of the fuse cannot be inserted into the elastic element formed by the inclined plate, vertical plate, arc-shaped plate, and tilting plate. The blade is divided into two groups, both of which are installed on the outside of the sealing plate, and the specifications of the two groups of blades are different. When the fuse is inserted in reverse, it cannot be inserted because the blade is not compatible, thus achieving a foolproof effect. Its structure is more optimized and its design is more reasonable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a fuse with a foolproof design.

[0015] Figure 2 This is a structural diagram of the base block in a fuse with a foolproof structure.

[0016] Figure 3 In a fuse with a foolproof structure Figure 1 Enlarged view of point A.

[0017] In the diagram: 1. Base block; 2. Fixing plate; 3. Nut; 4. Bolt; 5. Triangular seat; 6. Knife head fuse; 7. Sealing plate; 8. Nut mounting groove; 9. Placement groove; 10. Threaded hole; 11. Arc-shaped part; 12. Outward-facing piece; 13. Vertical piece; 14. Arc-shaped piece; 15. Angled piece; 16. Warping piece. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3In this embodiment of the utility model, a fuse with a foolproof structure includes a base block 1 and a knife-head fuse 6 that is plugged into the base block 1. A placement groove 9 is provided in the center of the upper surface of the base block 1. Triangular seats 5 are fixedly connected to both the left and right sides of the upper surface of the base block 1. An outward flap 12 is fixedly connected to the top of the triangular seat 5. A vertical piece 13 is installed on the inner side of the outward flap 12. An arc-shaped piece 14 is fixedly connected to the top of the vertical piece 13. An inclined piece 15 is fixedly connected to the end of the arc-shaped piece 14 away from the vertical piece 13. A rocker piece 16 is fixedly connected to the end of the inclined piece 15 away from the arc-shaped piece 14. The triangular seats 5 on the left and right sides are of different sizes. The top of the triangular seat 5 is composed of an elastic element consisting of the outward flap 12, the vertical piece 13, the arc-shaped piece 14, the inclined piece 15 and the rocker piece 16.

[0020] The vertical plate 13 provides vertical support, the arc plate 14 guides the sliding path of the cutter head, and the inclined plate 15 and the rocker plate 16 work together to form an elastic deformation space. When correctly installed, the cutter head fuse 6 is pressed down, the cutter head slides down along the arc plate 14, and the inclined plate 15 is deformed by pressure, causing the rocker plate 16 to temporarily contract, allowing the cutter head to pass through and lock in the inner frame of the triangular seat.

[0021] Because the two sets of cutter heads have different specifications (such as size and shape differences), when inserted in reverse, the cutter heads cannot fit the elastic space of the tilting plate 16 and are blocked by the inclined plate 15, vertical plate 13 and other structures, thus physically preventing reverse insertion and achieving the foolproof effect.

[0022] If the knife tip fuse 6 is mistakenly inserted in the wrong direction, the knife tip will not be able to pass through the elastic gap between the pry bar 16 and the inclined bar 15 due to the mismatch in specifications, triggering mechanical interference and making installation impossible. The operator should be reminded to correct the direction.

[0023] Please see Figure 3 Specifically: the pry bar 16 is in a forward-curving shape, there are two sets of pry bars 16, and the two sets of pry bars 16 are distributed in the same direction. The bottom of the triangular seat 5 is flat, and the outer wall of the triangular seat 5 is fixedly connected with an arc-shaped piece 11. The pry bar 16 is in a forward-curving shape, and the two sets of pry bars are distributed in the same direction, forming a one-way passage structure.

[0024] Please see Figures 1-2Specifically: Nut mounting slots 8 are provided on both the left and right sides of the upper surface of the placement slot 9. Threaded holes 10 are provided at the opening of the nut mounting slots 8. Fixing plates 2 are fixedly connected to both the left and right sides of the base block 1. Nuts 3 are installed on the upper surface of the fixing plates 2. Bolts 4 are threadedly connected to the axial part of the nuts 3. Loosen the bolts 4 at both ends of the base block 1, lift the cutter head fuse 6, and the cutter head slides in the opposite direction along the arc-shaped plate 14. The elastic element resets, and the cutter head disengages from the inner frame of the triangular seat, enabling convenient disassembly. The cutter head fuse 6 is installed at the opening of the placement slot 9. Sealing plates 7 are fixedly connected to both ends of the cutter head fuse 6. A set of cutter heads (divided into two sets with different specifications) is provided on the outer side of the sealing plates 7 fixed at both ends of the cutter head fuse 6. Only when the cutter head fuse 6 is inserted in the correct direction can the cutter head smoothly enter the inner frame of the triangular seat 5.

[0025] The working principle of this utility model is as follows:

[0026] In use, the nut mounting groove 8 opened on the upper surface of the base block 1 is used to fix it to the base surface with bolts, which facilitates the insertion and removal of the knife head fuse 6;

[0027] The sealing plates 7 fixed at both ends of the knife head fuse 6 are connected to the knife head, and the knife head is located in the inner frame of the triangular seat 5. After the knife head fuse 6 is pressed down, the knife head will slide down in the arc-shaped piece 14. Because the inclined piece 15, vertical piece 13, arc-shaped piece 14 and rocker piece 16 form an elastic element, when the knife head fuse 6 is inserted backwards, the knife head at the other end of the knife head fuse 6 cannot be inserted into the elastic element formed by the inclined piece 15, vertical piece 13, arc-shaped piece 14 and rocker piece 16. The knife head is divided into two groups, and both groups of knife heads are installed on the outside of the sealing plate 7. The specifications of the two groups of knife heads are different. When the knife head fuse 6 is inserted backwards, it cannot be inserted because the knife head is not compatible, thus achieving the effect of preventing fooling.

[0028] The fixing plates 2 installed at both ends of the base block 1, together with the nuts 3, are used to fix the base block 1 to the base surface again, which strengthens the stability of the base block 1 and ensures that the base block 1 will not detach from the base surface when the personnel lift the knife head fuse 6 from the inner frame of the triangular seat 5.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fuse with a foolproof structure, comprising a base block (1) and a blade fuse plugged into the base block (1), characterized in that: A placement groove (9) is provided in the center of the upper surface of the base block (1). Triangular seats (5) are fixedly connected to both the left and right sides of the upper surface of the base block (1). An outward flap (12) is fixedly connected to the top of the triangular seat (5). A vertical piece (13) is installed on the inner side of the outward flap (12). An arc-shaped piece (14) is fixedly connected to the top of the vertical piece (13). An inclined piece (15) is fixedly connected to the end of the arc-shaped piece (14) away from the vertical piece (13). A prying piece (16) is fixedly connected to the end of the inclined piece (15) away from the arc-shaped piece (14). The triangular seats (5) on the left and right sides are of different sizes.

2. A fuse with a foolproof structure according to claim 1, characterized in that: The curved piece (16) is in a forward-curving shape, and there are two sets of the curved pieces (16), with the two sets of curved pieces (16) distributed in the same direction.

3. A fuse with a foolproof structure according to claim 1, characterized in that: The bottom of the triangular base (5) is flat, and an arc-shaped component (11) is fixedly connected to the outer wall of the triangular base (5).

4. A fuse with a foolproof structure according to claim 1, characterized in that: Nut mounting grooves (8) are provided on both the left and right sides of the upper surface of the placement groove (9), and threaded holes (10) are provided at the groove opening of the nut mounting groove (8).

5. A fuse with a foolproof structure according to claim 1, characterized in that: The base block (1) is fixedly connected to the left and right sides with fixing plates (2), and the upper surface of the fixing plates (2) is fitted with nuts (3), and the axial part of the nuts (3) is threaded with bolts (4).

6. A fuse with a foolproof structure according to claim 4, characterized in that: The blade fuse (6) is installed at the opening of the placement slot (9), and sealing plates (7) are fixedly connected to both ends of the blade fuse (6).

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