Fuse

Abstract

The utility model relates to a fuse. A fuse comprises a shell, a first clamping protrusion and a second clamping protrusion are arranged at the bottom of the shell, a first limiting face is arranged on the outer wall of the bottom of the shell, and a matching space used for containing a rail is formed among the first clamping protrusion, the second clamping protrusion and the first limiting face. At least the first clamping bulge in the first clamping bulge and the second clamping bulge is a movable clamping bulge assembled on the shell, the first clamping bulge is provided with a limiting part, a clamping part and a fixing part, the shell is provided with a second limiting surface, the limiting part is close to the second limiting surface, and when the first clamping bulge is stressed, the clamping part is close to the fixing part. The first clamping protrusion elastically deforms, the clamping part is made to be away from the first limiting face, and the limiting part is made to be close to the second limiting face. According to the utility model, the fuse and the track are more convenient to assemble and fix, and the production cost is lower.

Description

Technical Field

[0001] This utility model relates to a fuse. Background Technology

[0002] Chinese patent CN203774239U discloses a fuse and track fixing structure, including a fixed wing and a mounting base. The mounting base is provided with a movable wing, and a positioning opening is formed between the movable wing and the back of the fuse. A positioning groove for track installation is formed between the movable wing and the fixed wing. An operating part is provided on the other end face of the mounting base opposite to the movable wing, and the operating part is rotatable and axially fixed on the mounting base. A through hole is provided on the operating part, and an internal thread is provided inside the through hole. A screw is provided between the movable wing and the operating part, and one end of the screw is fixedly connected to the movable wing and the other end is threadedly connected to the operating part.

[0003] Chinese patent CN221885047U discloses a fixing structure for a fuse. A fixing block is provided on the side of the fuse body near the track. The fixing block is provided with a fixing structure that simultaneously limits the two ends of the track, and is used to snap / slide the fuse body onto the track. The fixing structure includes a screw rotatably mounted on the fixing block. The two ends of the screw are screwed to a first locking block by threads. The threads at the two ends of the screw are in opposite directions. The two ends of the track are snapped between the fixing block and the first locking block.

[0004] Both of the above solutions use helical rotation to achieve axial movement of the movable wing or the first locking block, thereby clamping and fixing the track between the movable wing and the fixed wing or between the fixed block and the first locking block, thus fixing the fuse to the track. The position of the movable wing or locking block needs to be adjusted by rotating the operating part or screw, which is a relatively cumbersome operation process, especially in environments with limited space or inconvenient operation, resulting in low installation and disassembly efficiency. At the same time, this solution has more parts, which leads to higher production costs. Utility Model Content

[0005] The purpose of this invention is to provide a fuse that is easy to operate and has a low production cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fuse, comprising a housing, wherein a first snap-fit ​​protrusion and a second snap-fit ​​protrusion are provided at the bottom of the housing, and a first limiting surface is provided on the outer wall of the bottom of the housing. A mating space for accommodating a track is formed between the first snap-fit ​​protrusion, the second snap-fit ​​protrusion and the first limiting surface. At least the first snap-fit ​​protrusion is a movable snap-fit ​​protrusion assembled on the housing. The first snap-fit ​​protrusion has a limiting portion and a snap-fit ​​portion on opposite sides. The first snap-fit ​​protrusion also has a fixing portion for connecting with the housing. The snap-fit ​​portion is closer to the second snap-fit ​​protrusion than the limiting portion. The housing has a second limiting surface, and the limiting portion is closer to the second limiting surface. When the first snap-fit ​​protrusion is subjected to force, the first snap-fit ​​protrusion elastically deforms, causing the snap-fit ​​portion to move away from the first limiting surface and the limiting portion to move closer to the second limiting surface.

[0007] This invention relates to a fuse that enables quick engagement and disengagement between the fuse and the track via a movable first snap-fit ​​protrusion, eliminating the need for complex threaded operations and making installation and disassembly more convenient. The first snap-fit ​​protrusion moves by elastic deformation and can be made of plastic, the same material as the fuse housing and other components, resulting in lower manufacturing and assembly costs and thus lower production costs.

[0008] Preferably, the fixing part and the housing are provided with a positioning hole that mates with each other and a positioning protrusion that extends into the positioning hole. The housing includes a first housing and a second housing disposed opposite to each other. The first housing and the second housing are joined together to restrict the fixing part between the first housing and the second housing, and the positioning protrusion mates with the positioning hole. The cooperation of the positioning hole and the positioning protrusion ensures the installation accuracy and stability of the first snap-fit ​​protrusion on the housing and prevents positional displacement during use. The above solution makes the assembly of the first snap-fit ​​protrusion more convenient.

[0009] Preferably, the limiting portion of the first snap-fit ​​protrusion is connected to the snap-fit ​​portion, and the fixing portion is connected to the limiting portion or the snap-fit ​​portion or the connection between the limiting portion and the snap-fit ​​portion through an elastic deformation portion. The elastic deformation portion includes a sheet-like or strip-like connecting unit. One end of the connecting unit along the length direction is connected to the fixing portion, and the other end of the connecting unit along the length direction is connected to the limiting portion or the snap-fit ​​portion or the connection between the limiting portion and the snap-fit ​​portion.

[0010] The elastic deformation section uses sheet-like or strip-like connecting units, which can provide sufficient elastic deformation capacity, allowing the locking protrusion to elastically move away from the first limiting surface when subjected to force, thereby achieving rapid locking and unlocking.

[0011] Preferably, the connecting unit is arc-shaped, with the opening of the arc facing or away from the second snap-fit ​​protrusion. The arc-shaped design of the connecting unit further optimizes the elastic deformation performance, resulting in more uniform stress distribution and extended service life.

[0012] Preferably, the elastic deformation section includes at least two connecting units arranged side by side, with a cavity formed between the two connecting units. The side-by-side arrangement of multiple connecting units forming a cavity increases the flexibility of the elastic deformation section while reducing material usage, further lowering costs.

[0013] Preferably, the housing has an extended protrusion located between two adjacent connecting units, the extended protrusion being close to the end of the connecting unit and away from the limiting part and the snap-fit ​​part. The extended protrusion, located between two adjacent connecting units and close to the end of the connecting unit, can support and limit the elastically deformable part, preventing excessive bending or damage to the elastically deformable part during deformation. It can also cooperate with the cavity to provide a positioning effect, improving the connection and fixing stability of the first snap-fit ​​protrusion.

[0014] Preferably, the first limiting surface is provided with a limiting protrusion, which is close to the second engaging protrusion. The space between the limiting protrusion and the second engaging protrusion is part of the mating space. The limiting protrusion, made of plastic integrally molded with the housing, can abut against the track, providing a more stable limiting effect and ensuring that the fuse is more firmly fixed on the track.

[0015] Preferably, the limiting protrusion has a first mating surface, and the second snap-fit ​​protrusion has a second mating surface. Both the first mating surface and the second mating surface gradually extend from the side of the first snap-fit ​​protrusion to the side of the second snap-fit ​​protrusion toward the side of the first limiting surface.

[0016] Preferably, the locking portion has a notch at the distance between the second locking protrusion and the first limiting surface. The notch facilitates the assembler's manipulation of the first locking protrusion, further simplifying the assembly of the fuse and the track. Simultaneously, the notch reduces the contact area between the locking portion and the track, lowering friction and making locking and unlocking operations easier. The notch can also be used to clamp the track.

[0017] Preferably, the limiting portion extends laterally and extends to the side of the housing.

[0018] This invention has the advantages of making the assembly and fixing of the fuse to the track more convenient, and also has the advantage of lower production cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the bottom structure of the fuse of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the first snap-fit ​​protrusion of the fuse of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the second contact protrusion of the fuse of this utility model. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0023] Depend on Figure 1 As shown, this embodiment discloses a fuse, including a housing 100. The housing 100 includes a first housing and a second housing disposed opposite to each other, and the first housing and the second housing are joined to form a receiving cavity for accommodating fuse components. A first engaging protrusion 2 and a second engaging protrusion 3 are provided at the bottom of the housing 100, and a first limiting surface 101 is provided on the outer wall of the bottom of the housing 100. A mating space 10 for accommodating a track is formed between the first engaging protrusion 2, the second engaging protrusion 3 and the first limiting surface 101. The first engaging protrusion 2 and the second engaging protrusion 3 are located on the lower left and lower right sides of the housing 100, respectively.

[0024] Depend on Figure 1 and Figure 2 As shown, the first snap-fit ​​protrusion 2 is a movable snap-fit ​​protrusion assembled on the housing 100. The first snap-fit ​​protrusion 2 includes a fixing part 21 located at the top for connecting with the housing 100, a limiting part 22 located at the bottom left and right, and a snap-fit ​​part 23. The limiting part 22 is located to the left of the snap-fit ​​part 23, and the limiting part 22 has a corner protrusion 221 extending to the left and upward and located on the left side of the housing 100. The left side wall and the lower side wall at the lower left corner of the housing 100 form a second limiting surface 102 for contacting the limiting part 22. The limiting part 22 is close to the second limiting surface 102.

[0025] At least two sets of mutually cooperating positioning holes (not shown in the figure) and positioning protrusions (not shown in the figure) extending into the positioning holes are provided between the fixing part 21 and the first housing. The lower left corner of both the first housing and the second housing is provided with downward openings for the limiting part 22 and the snap-fit ​​part 23 to extend out, and the lower left side of the first housing and the lower left side of the second housing respectively form a blocking part 103 to block the first snap-fit ​​protrusion 2 from the front and back.

[0026] The limiting portion 22 of the first snap-fit ​​protrusion 2 is connected to the snap-fit ​​portion 23. The fixing portion 21 is connected to the connection between the limiting portion 22 and the snap-fit ​​portion 23 through the elastic deformation portion 24. The elastic deformation portion 24 includes two connecting units that are sheet-like or strip-like. The upper ends of the two connecting units along the length direction are connected to the fixing portion 21, and the lower ends of the connecting units along the length direction are connected to the snap-fit ​​portion. When the first snap-fit ​​protrusion 2 is subjected to force, the elastic deformation portion 24 of the first snap-fit ​​protrusion 2 elastically deforms, causing the snap-fit ​​portion to move away from the first limiting surface and the limiting portion to move closer to the second limiting surface.

[0027] In this design, the two side-by-side connecting units of the elastic deformation part 24 are both arc-shaped, with the opening of the arc formed by the connecting units facing to the right; a cavity is formed between the two connecting units, and the housing has an extension protrusion 104 located between the two adjacent connecting units, with the extension protrusion 104 close to the end of the connecting unit and away from the limiting part 22 and the snap-fit ​​part 23. The snap-fit ​​part 23 has a notch 231 at the upper right corner.

[0028] Depend on Figure 1 and Figure 3 As shown, a limiting protrusion 105 is provided on the first limiting surface 101. The limiting protrusion 105 is close to the second locking protrusion 3. The space between the limiting protrusion 105 and the second locking protrusion 3 is part of the mating space. The limiting protrusion 105 is provided with a first mating surface 1051, and the second locking protrusion 3 is provided with a second mating surface 31. Both the first mating surface 1051 and the second mating surface 31 extend gradually upward from left to right.

[0029] This embodiment has the advantages of making the assembly and fixing of the fuse to the track more convenient, and also has the advantage of lower production cost.

Claims

1. A fuse comprising a shell, the shell being provided with a first clamping protrusion and a second clamping protrusion at the bottom of the shell, the shell bottom outer wall having a first limiting surface, the first clamping protrusion, the second clamping protrusion and the first limiting surface forming a fitting space for accommodating a rail, characterized in that: At least the first clamping protrusion is a movable clamping protrusion assembled on the shell, the first clamping protrusion has a limiting portion and a clamping portion on opposite sides, the first clamping protrusion further has a fixing portion for connecting with the shell, the clamping portion is closer to the second clamping protrusion than the limiting portion, the shell has a second limiting surface, the limiting portion is close to the second limiting surface, when the first clamping protrusion is forced, the first clamping protrusion elastically deforms, and the clamping portion is away from the first limiting surface, and the limiting portion is close to the second limiting surface.

2. A fuse according to claim 1, characterized in that: The fixing portion and the shell are provided with a positioning hole and a positioning protrusion extending into the positioning hole, the shell comprises a first shell and a second shell arranged oppositely, the first shell and the second shell are spliced to limit the fixing portion between the first shell and the second shell, and the positioning protrusion cooperates with the positioning hole.

3. A fuse according to claim 1 or 2, characterised in that: The limiting portion of the first clamping protrusion is connected with the clamping portion, the fixing portion is connected with the limiting portion or the clamping portion or the connecting portion of the limiting portion and the clamping portion through an elastic deformation portion, the elastic deformation portion comprises a sheet-shaped or strip-shaped connecting body, one end of the connecting body along the length direction is connected with the fixing portion, and the other end of the connecting body along the length direction is connected with the limiting portion or the clamping portion or the connecting portion of the limiting portion and the clamping portion.

4. A fuse according to claim 3, wherein: The connecting body is in an arc shape, and an opening of the arc shape formed by the connecting body faces or is away from the second clamping protrusion.

5. A fuse according to claim 3, wherein: The elastic deformation portion comprises at least two connecting bodies arranged side by side, and a cavity is formed between the two connecting bodies.

6. A fuse according to claim 5, characterised in that: The shell has an extension protrusion between the two connecting bodies, the extension protrusion is close to the end of the connecting body and is away from the limiting portion and the clamping portion.

7. A fuse according to claim 1, wherein: The first limiting surface is provided with a limiting protrusion, the limiting protrusion is close to the second clamping protrusion, and a space between the limiting protrusion and the second clamping protrusion is part of the matching space.

8. A fuse according to claim 7, characterised in that: The limiting protrusion is provided with a first matching surface, the second clamping protrusion is provided with a second matching surface, and the first matching surface and the second matching surface gradually extend to the first limiting surface side from the side of the first clamping protrusion to the side of the second clamping protrusion.

9. A fuse according to claim 1, wherein: The clamping portion has a notch at a position away from the second clamping protrusion and the first limiting surface.

10. The fuse of claim 1, wherein: The limiting portion extends to the side of the shell.

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