Fuse housing

Abstract

The utility model discloses a fuse shell, the shell includes the bottom shell and upper cover through the hinged end articulates, and the accommodating cavity of accommodating fuse is formed between the two, the bottom shell extends the connecting step of one side away from the hinged end, and the lower surface of connecting step is equipped with lower fitting part, the upper cover is equipped with the buckle step of one side away from the hinged end, and the upper fitting part is equipped on the buckle step, and lower, upper fitting part is the concave-convex structure of being able to mutually fit. Its through concave-convex fitting structure, greatly promote the connection intensity of bottom shell and upper cover non-hinged end, avoid the loose separation when shell is collided, vibrates, and simple structure does not need complex spare parts, reduces the processing cost, adapts most hinged fuse shell basic structure, is convenient for promoting, can guarantee fuse working environment clean, improves circuit use safety.

Description

Technical Field

[0001] This utility model relates to the field of fuse accessories technology, specifically to a fuse housing. Background Technology

[0002] In the field of electronic circuit protection, fuses are key overcurrent protection components, and their housings play a crucial role in ensuring normal operation, preventing accidental electric shock, and mitigating the spread of circuit faults. Currently, most commercially available fuse housings employ a structure where the bottom shell and top cover are connected by a hinged joint. When closed, these two parts form a cavity to house the fuse, thus achieving encapsulation and protection.

[0003] However, existing fuse housings of this type still have significant shortcomings in practical use: the bottom shell and the top cover, on the side furthest from the hinge end, are usually connected only by a simple snap-fit ​​method, lacking a stable fitting structure. This connection method means that after the housing is closed, the connection between the bottom shell and the top cover is prone to loosening or even separation under external impact, vibration, or long-term use. Once the housing connection fails, not only will the fuse be exposed and lose its protective function, but dust, moisture, and other impurities may also enter the housing cavity, affecting the fuse's performance. In severe cases, this can even lead to safety hazards such as short circuits and leakage, failing to meet the requirements of electronic devices for the stability of the fuse housing connection. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a fuse housing.

[0005] The technical solution adopted by this utility model is: a fuse housing, including a bottom shell and a top cover that are hinged together by a hinge end, and a receiving cavity for accommodating the fuse is provided between the bottom shell and the top cover. The bottom shell extends a connecting step on the side away from the hinge end, and a lower fitting part is provided on the lower surface of the connecting step; The upper cover has a snap-fit ​​step on the side away from the hinge end, and the snap-fit ​​step has an upper fitting part. The lower fitting part and the upper fitting part are concave and convex structures that can fit into each other.

[0006] Furthermore, the upper fitting portion is a continuous convex strip, and the lower fitting portion is a groove that fits into the convex strip.

[0007] Furthermore, the fastening step includes an extension plate extending away from the hinge end, a connecting plate connected to the extension, and hooks spaced apart on the connecting plate, with the grooves provided on the bottom surface of the hooks.

[0008] Furthermore, the extension plate below the hook is provided with a molded through groove that corresponds one-to-one with the hook.

[0009] Furthermore, the bottom shell has a left positioning step and a right positioning step at both ends of its receiving cavity, and positioning grooves are provided on the left positioning step and the right positioning step. A sleeve is provided in the receiving cavity of the bottom shell between the left positioning step and the right positioning step; The upper cover has a pressing protrusion on its receiving cavity.

[0010] Furthermore, wiring through holes are provided at both ends of the bottom shell.

[0011] Furthermore, operating parts are provided on both sides of the lower fitting portion.

[0012] The beneficial effects of this utility model are: 1. Significantly improves connection stability: This patent provides a lower fitting part on the lower surface of the connecting step of the bottom shell and an upper fitting part on the fastening step of the top cover. The two parts adopt a concave-convex structure that fits into each other. Compared with the connection method of simple fastening in the prior art, this greatly enhances the connection strength between the bottom shell and the top cover on the side away from the hinge end, effectively preventing the connection from loosening or even separating, and ensuring that the shell is always in a stable closed state.

[0013] 2. Simple and practical structural design with strong adaptability: The concave-convex interlocking structure is only formed at the corresponding steps of the bottom shell and the top cover, without the need for additional complex parts. This simplifies the overall structure of the shell, reduces the difficulty and cost of production and processing, and can be adapted to the basic structure of most existing fuse shells that are connected by hinge ends. This facilitates the promotion and application of fuse products of different specifications and types, and meets the needs of various electronic devices for fuse shells.

[0014] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 3 This is a schematic diagram from another perspective of the present invention.

[0019] Figure 1-3In the middle: 1. Hinge end; 2. Bottom shell; 3. Top cover; 4. Receiving cavity; 5. Connecting step; 6. Lower fitting part; 7. Snap-fitting step; 8. Upper fitting part; 9. Protrusion; 10. Groove; 11. Extension plate; 12. Connecting plate; 13. Hook; 14. Forming through groove; 15. Left positioning step; 16. Right positioning step; 17. Positioning groove; 18. Sleeve part; 19. Pressing protrusion; 20. Wiring through hole; 21. Operating part. Detailed Implementation

[0020] 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.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] This utility model provides a fuse housing.

[0023] In this embodiment, refer to Figure 1-3 The fuse housing includes a bottom shell 2 and a top cover 3 hinged together by a hinge end 1, and a receiving cavity 4 for accommodating the fuse is provided between the bottom shell 2 and the top cover 3. The bottom shell extends a connecting step 5 on the side away from the hinge end, and a lower fitting part 6 is provided on the lower surface of the connecting step 5. The upper cover has a snap-fit ​​step 7 on the side away from the hinge end, and the snap-fit ​​step 7 has an upper fitting part 8. The lower fitting part and the upper fitting part are concave and convex structures that can fit into each other.

[0024] In this embodiment, the bottom shell and the top cover are connected by a hinged end as the basic structure. A connecting step extends from the bottom shell away from the hinged end and a lower fitting part is provided. A fastening step and an upper fitting part are provided on the corresponding side of the top cover. Through the interlocking characteristics of the concave and convex structures, a dual connection mechanism is constructed between the non-hinged ends of the bottom shell and the top cover. This retains the rotation and opening function of the hinged end and achieves tight locking of the non-hinged end through the concave and convex fitting, forming a concave and convex fitting composite connection structure.

[0025] Thus, it breaks through the limitations of existing simple snap-fit ​​connections. The concave-convex interlocking structure effectively improves the connection strength of the non-hinged ends. Even if subjected to external impact, vibration or long-term wear, it can still stably lock the relative position of the bottom shell and the top cover, preventing the outer shell from loosening and separating.

[0026] Specifically, the upper fitting part is a continuous convex strip 9, and the lower fitting part is a groove 10 that fits into the convex strip 9.

[0027] In this embodiment, the fitting part is a continuous convex strip and the lower fitting part is a groove that fits it. The stable connection between the two is achieved by the mutual fitting of the continuous convex strip and the groove.

[0028] Specifically, the locking step includes an extension plate 11 extending away from the hinge end, a connecting plate 12 connected to the extension plate 11, and hooks 13 spaced apart on the connecting plate 12, with the grooves provided on the bottom surface of the hooks.

[0029] In this embodiment, when the cover is closed, the hook engages with the connecting step. At the same time, the groove is set on the bottom surface of the hook, and the groove and the protrusion interlock with each other. Thus, based on the hook engagement, the groove and the protrusion interlock with each other, greatly improving the stability of the connection.

[0030] Specifically, the extension plate below the hook is provided with a forming through groove 14 corresponding to the hook.

[0031] In this embodiment, a molding through groove corresponding to each of the interlocking blocks is provided on the extension plate below the interlocking blocks. The spatial structure of the molding through groove provides a demolding channel for the groove on the bottom surface of the interlocking block during injection molding, avoiding the processing difficulties caused by the enclosed space of the groove. On the other hand, the through groove can form an "elastic clearance space". When the interlocking block is squeezed by external force, the through groove can buffer the stress and prevent the interlocking block from rigidly breaking.

[0032] Specifically, the bottom shell has a left positioning step 15 and a right positioning step 16 at both ends of the receiving cavity, and positioning grooves 17 are provided on the left and right positioning steps. A sleeve section 18 is provided in the receiving cavity of the bottom shell between the left positioning step and the right positioning step; The upper cover has a pressing protrusion 19 on its receiving cavity.

[0033] In this embodiment, the positioning grooves of the left and right positioning steps are used to define the installation positions of both ends of the fuse, preventing the fuse from moving laterally within the receiving cavity; the sleeve provides support for the middle part of the fuse, preventing the fuse from bending due to its own weight or vibration; the pressing protrusion of the top cover presses the fuse downward after the cover is closed, forming a comprehensive fixing system of "positioning at both ends, supporting in the middle, and pressing at the top". This improves the installation stability of the fuse.

[0034] Specifically, the bottom shell has wiring through holes 20 at both ends.

[0035] In this embodiment, wiring through holes are provided at both ends of the bottom shell as channels for connecting the fuse lead wire to the external circuit.

[0036] Specifically, operating parts 21 are provided on both sides of the lower fitting part.

[0037] In this embodiment, operating parts are provided on both sides of the lower fitting part. The protrusions or extensions of the operating parts provide a force application point for the operator. When opening and closing the outer shell, the lower fitting part can be separated from the upper fitting part by pinching or pushing the operating parts, avoiding the difficulty of disassembly due to excessive tightness, thus balancing "connection stability" and "opening and closing convenience".

[0038] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A fuse housing, comprising a bottom shell and a top cover hinged together at hinge ends, wherein a receiving cavity for accommodating a fuse is provided between the bottom shell and the top cover, characterized in that: The bottom shell extends a connecting step on the side away from the hinge end, and a lower fitting part is provided on the lower surface of the connecting step; The upper cover has a snap-fit ​​step on the side away from the hinge end, and the snap-fit ​​step has an upper fitting part. The lower fitting part and the upper fitting part are concave and convex structures that can fit into each other.

2. The fuse housing according to claim 1, characterized in that: The upper fitting part is a continuous convex strip, and the lower fitting part is a groove that fits into the convex strip.

3. The fuse housing according to claim 2, characterized in that: The locking step includes an extension plate extending away from the hinge end, a connecting plate connected to the extension, and hooks spaced apart on the connecting plate, with the grooves provided on the bottom surface of the hooks.

4. The fuse housing according to claim 3, characterized in that: The extension plate below the hook is provided with a molded through groove that corresponds one-to-one with the hook.

5. The fuse housing according to claim 1, characterized in that: The bottom shell has a left positioning step and a right positioning step at both ends of its receiving cavity, and positioning grooves are provided on the left positioning step and the right positioning step. A sleeve is provided in the receiving cavity of the bottom shell between the left positioning step and the right positioning step; The upper cover has a pressing protrusion on its receiving cavity.

6. The fuse housing according to claim 1, characterized in that: The bottom shell has wiring through holes at both ends.

7. The fuse housing according to claim 1, characterized in that: Operating parts are provided on both sides of the lower fitting part.

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