Fuse with limiting structure

Abstract

The utility model relates to the technical field of fuses, and discloses a fuse with a limiting structure, which comprises a shell, a handle rotationally arranged on the shell, a fusible core seat fixedly arranged on the handle, and a fusible core arranged on the fusible core seat, and is characterized in that a conductive clamping piece used for contacting and clamping two ends of the fusible core is arranged in the shell; an elastic limiting structure is arranged below the fusible core seat in the shell, and when the handle rotates towards the outer side of the shell, one end of the fusible core seat is clamped on the elastic limiting structure. According to the fuse, the fusible core seat is limited through the elastic limiting structure, compared with a traditional mode that the fusible core seat is limited through a conductive clamping piece, the fusible core seat is not prone to extruding the conductive clamping piece, and the limiting effect of the conductive clamping piece on the fusible core is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of fuses, and in particular to a fuse with a limiting structure. Background Art

[0002] As an important component of circuit protection in power systems, fuses mainly use fuses or other fusible materials to quickly melt when the current is overloaded, thereby disconnecting the circuit and achieving protection functions. They are widely used in high and low voltage distribution systems, control systems, and various electrical equipment.

[0003] In the related art, a conventional fuse includes a housing, a handle rotatably mounted on the housing, a fuse holder fixedly mounted on the handle, and a fuse mounted on the fuse holder. The housing is provided with a conductive clamp for contacting and clamping the fuse or fuse holder. When removing or installing the fuse, the handle is rotated toward the outside of the housing, so that one end of the fuse holder is rotated to the outside of the housing and the other end is located inside the housing. At this time, the conductive clamps clamp onto both sides of the fuse holder located inside the housing, thereby limiting the position of the fuse holder. After removing or installing the fuse, the handle is rotated toward the inside of the housing, so that both ends of the fuse holder are rotated to the inside of the housing. At this time, the conductive clamps clamp onto both ends of the fuse, thereby limiting the position of the fuse.

[0004] However, when the above-mentioned fuse limits the fuse core seat or the fuse core through the conductive clamping part, if the width of the fuse core seat is smaller than the diameter of the fuse core, the force of the conductive clamping part to contract and clamp the fuse core seat will be too small, and the limiting effect will be poor; if the width of the fuse core seat is larger than the diameter of the fuse core, the conductive clamping part will be further stretched by the fuse core seat, and long-term operation will easily cause elastic fatigue of the conductive clamping part and affect the contact effect between the conductive clamping part and the fuse core, which needs to be improved. Utility Model Content

[0005] In order to ensure the limiting effect of the fuse core and the fuse core seat, the present application provides a fuse with a limiting structure.

[0006] The present application provides a fuse with a limit structure that adopts the following technical solution:

[0007] A fuse with a limiting structure comprises a shell, a handle rotatably arranged on the shell, a fuse core holder fixedly arranged on the handle, and a fuse core mounted on the fuse core holder. The shell is provided with a conductive clamping piece for contacting and clamping both ends of the fuse core. An elastic limiting structure is provided below the fuse core holder in the shell. When the handle is rotated toward the outside of the shell, one end of the fuse core holder is clamped on the elastic limiting structure.

[0008] By adopting the above technical solution, when removing or installing the fuse core, the handle is rotated toward the outside of the housing until one end of the fuse core holder engages the elastic limiting structure. At this point, the elastic limiting structure acts to limit the fuse core holder, thereby fixing the fuse core holder in place, facilitating installation and removal of the fuse core, and providing a good limiting effect. Compared to the traditional method of limiting the fuse core holder using a conductive clamp, the above limiting method is less likely to squeeze the conductive clamp, which helps to ensure that the conductive clamp effectively limits the fuse core.

[0009] Optionally, the elastic limiting structure includes a first arch block and a second arch block, a limiting portion is provided at one end of the fusible core seat, and a limiting groove for the limiting portion to be engaged and extended into is formed between the first arch block and the second arch block.

[0010] By adopting the above technical solution, when the handle is rotated toward the outside of the shell, the limiting portion is engaged in the limiting groove, and the groove wall of the limiting groove can prevent the limiting portion from further displacement, so that the fuse core seat can be positioned at a position where one end is exposed to the shell, so as to facilitate the disassembly and assembly of the fuse core, with a simple structure and easy disassembly and assembly.

[0011] Optionally, the first arch block and the second arch block are both integrally formed on the shell.

[0012] By adopting the above technical solution, the first arch block and the second arch block are integrally formed on the outer shell, which not only simplifies the production process of the fuse and improves production efficiency, but also improves the structural strength and integrity of the elastic limiting structure itself, thereby further enhancing the limiting effect of the elastic limiting structure on the fuse core seat.

[0013] Optionally, the width of the first arch block and the second arch block is not less than the width of the limiting portion.

[0014] By adopting the above technical solution, when the fuse seat and the elastic limiting structure are offset against each other, the contact area between the elastic limiting structure and the limiting portion is large, and the limiting effect is good.

[0015] Optionally, a narrowing portion is provided on the fuse seat, and the conductive clamping part includes a connecting portion and two clamping portions integrally formed on the same side of the connecting portion, a clamping groove is formed between the connecting portion and the two clamping portions, and the width of the clamping groove is greater than the width of the narrowing portion; when the fuse seat is clamped with the elastic limiting structure, the narrowing portion is located in the clamping groove.

[0016] By adopting the above technical solution, when the handle is turned so that the fuse seat is engaged with the elastic limiting structure, the part of the fuse seat located in the clamping groove is a narrowed part, which makes it difficult for the conductive clamping part to be stretched open by the fuse seat, resulting in deformation and weakening of elasticity, which is beneficial to ensure the elasticity and clamping force of the conductive clamping part, so as to stably clamp the fuse after the handle is turned toward the inside of the shell.

[0017] Optionally, an elastic reinforcement rod is provided in the shell, and the reinforcement rod includes a mounting portion and two reinforcement portions integrally formed on the same side of the mounting portion, and the two reinforcement portions respectively abut against the sides of the two clamping portions away from each other.

[0018] By adopting the above technical solution, the reinforcement part has an elastic force on the clamping part toward the clamping groove, which can enhance the deformation resistance of the clamping part when it is squeezed by the molten core, so that the conductive clamping part has a strong clamping force on the molten core and high stability.

[0019] Optionally, a mounting groove is provided on the outer shell, and the mounting portion is passed through the mounting groove; a plurality of groups of positioning members are provided on the clamping portion, each group of positioning members includes two relatively arranged positioning blocks, a positioning groove is formed between the two positioning blocks in the same positioning member, and the reinforcement portion is passed through the positioning groove.

[0020] By adopting the above technical solution, the groove wall of the installation groove can hinder the horizontal movement of the installation part, and the groove wall of the positioning groove can hinder the horizontal movement of the reinforcement part, which is conducive to ensuring the reinforcement effect of the reinforcement rod on the conductive clamping member.

[0021] Optionally, a plurality of positioning rings are provided on the fuse core seat, and the fuse core is passed through each positioning ring.

[0022] By adopting the above technical solution, when disassembling the fusible core, after turning the handle so that the positioning ring extends out of the shell, the fusible core only needs to be inserted into or out of the positioning ring to realize the disassembly of the fusible core. The structure is simple and the disassembly and assembly are convenient.

[0023] Optionally, the shell is provided with a clearance hole for the handle to be rotated out, the hole wall of the clearance hole is provided with a clamping portion at one end thereof, and the side wall of the handle is provided with a clamping groove for the clamping portion to be extended into, when the fuse seat is rotated to abut against the elastic limiting structure, the clamping portion extends into the clamping groove.

[0024] By adopting the above technical solution, when the fuse seat rotates to abut against the elastic limiting structure, the fuse seat is not only fixed by the limiting part being clamped into the limiting groove, but also fixed by the clamping part extending into the clamping groove. Even if the limiting part accidentally detaches from the limiting groove, the clamping part is still located in the clamping groove. The clamping part and the clamping groove cooperate with each other to further hinder the movement of the fuse seat.

[0025] Optionally, a connecting groove is circumferentially provided on the hole wall of the clearance hole, and a rubber pad is detachably provided in the connecting groove, and the rubber pad will abut against the handle when the conductive clamping member contacts the clamping fuse.

[0026] By adopting this technical solution, when the fuse core is in place, the conductive clamping member clamps onto the fuse core, and the rubber pad abuts between the handle and the housing. This increases the friction between the handle and the housing, thereby ensuring more stable fixation of the fuse core holder and more stable contact between the conductive clamping member and the fuse core. Furthermore, the rubber pad prevents external moisture from entering the interior of the housing, providing excellent waterproofing.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When removing or installing the fuse core, you can first rotate the handle toward the outside of the housing so that the limit portion is engaged with the elastic limit structure, thereby fixing the position of the fuse core holder relative to the housing, making it easier to remove or install the fuse core;

[0029] 2. When the handle is rotated toward the outside of the housing, the narrowed portion of the fuse holder is located in the clamping groove of the conductive clamp, making it difficult for the conductive clamp to be expanded by the fuse holder and affect its clamping effect on the fuse;

[0030] 3. When the conductive clamp is squeezed by the molten core, the reinforcement rod can enhance the deformation resistance of the conductive clamp, so that the conductive clamp has greater clamping force and higher stability on the molten core. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the overall structural diagram of Example 1 of the present application.

[0032] Figure 2 It is a structural diagram of Example 1 of the present application when the fuse seat and the elastic limiting structure are separated.

[0033] Figure 3 It is a structural schematic diagram of the conductive clamping member in Example 1 of the present application.

[0034] Figure 4 This is a structural diagram of Example 1 of the present application when the fuse seat and the elastic limiting structure are in contact.

[0035] Figure 5 This is a structural diagram of Example 2 of the present application used to show the clamping part and the clamping groove.

[0036] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0037] Figure 7 This is a schematic diagram of the structure of the rubber pad used in Example 2 of the present application.

[0038] Figure 8 yes Figure 7 Enlarged view of point B in the middle.

[0039] Description of reference numerals:

[0040] 1. Housing; 11. Conductive clamping member; 111. Connecting portion; 112. Clamping portion; 113. Clamping groove; 114. Positioning member; 115. Positioning block; 116. Positioning groove; 12. Elastic limiting structure; 121. First arch block; 122. Second arch block; 123. Limiting groove; 13. Reinforcement rod; 131. Mounting portion; 132. Reinforcement portion; 14. Mounting groove; 15. Clearance hole; 151. Clamping portion; 152. Connecting groove; 153. Rubber pad; 16. Rotating shaft; 2. Handle; 21. Clamping groove; 3. Fuse holder; 31. Limiting portion; 32. Narrowing portion; 33. Positioning ring; 4. Fuse. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-8 This application is described in further detail.

[0042] An embodiment of the present application discloses a fuse with a limiting structure.

[0043] Example 1

[0044] Reference Figure 1 and Figure 2 A fuse with a limiting structure includes a housing 1, a handle 2 rotatably mounted on the housing 1, a fuse holder 3 fixedly mounted on the handle 2, and a fuse 4 mounted on the fuse holder 3. The housing 1 is provided with a conductive clamp 11 for contacting and clamping both ends of the fuse 4, and an elastic limiting structure 12 for positioning the fuse holder 3. The housing 1 is provided with a rotating shaft 16 passing through one end of the handle 2, and the handle 2 can rotate relative to the housing 1 around the rotating shaft 16. It should be noted that the housing 1 in this embodiment includes two mutually engaged shells. Figure 2 This is a schematic diagram of the structure when one of the shells is hidden.

[0045] Reference Figure 2 The housing 1 is provided with a clearance hole 15 for the handle 2 to be rotated out. The fuse holder 3 is integrally formed on the handle 2 and can rotate synchronously with the handle 2. Specifically, the fuse holder 3 is integrally formed with a plurality of positioning rings 33. In this embodiment, two positioning rings 33 are provided to illustrate the structure. The fuse 4 is inserted into each positioning ring 33, thereby achieving a detachable connection between it and the fuse holder 3 and convenient operation.

[0046] Reference Figure 2 and Figure 3 Two sets of conductive clamping members 11 are provided. Each set of conductive clamping members 11 includes a connecting portion 111 and two clamping portions 112 integrally formed on the same side of the connecting portion 111. A clamping groove 113 is formed between the connecting portion 111 and the two clamping portions 112. When the handle 2 controls the fusible core 4 to rotate into the housing 1, the two ends of the fusible core 4 are clamped in the clamping grooves 113 of the two conductive clamping members 11, respectively, providing high stability.

[0047] Reference Figure 3 To further enhance the retaining effect of the conductive clamping members 11 on the fuse core 4, a reinforcement rod 13 is provided on the housing 1 at the position corresponding to each set of conductive clamping members 11. The reinforcement rod 13 is made of an elastically deformable metal rod and automatically resets when the external force is removed. The reinforcement rod 13 includes a mounting portion 131 and two reinforcement portions 132 integrally formed on the same side of the mounting portion 131. The two reinforcement portions 132 respectively abut the sides of the two clamping portions 112 facing away from each other.

[0048] Reference Figure 3 and Figure 4 The housing 1 is provided with mounting grooves 14 corresponding to the two groups of conductive clamping members 11, and the mounting portion 131 is inserted into the mounting groove 14; a plurality of groups of positioning members 114 are provided on the opposite sides of the two clamping portions 112 of each group of conductive clamping members 11. In this embodiment, a group of positioning members 114 is provided on each clamping portion 112 to illustrate its structure. Each group of positioning members 114 includes two positioning blocks 115 arranged opposite to each other. A positioning groove 116 is formed between the two positioning blocks 115 in the same positioning member 114, and the reinforcement portion 132 is inserted into the positioning groove 116. The mounting portion 131 of the reinforcement rod 13 is inserted into the mounting groove 14, and the reinforcement portion 132 is inserted into the positioning groove 116, so that the reinforcement rod 13 is not easy to move relative to the conductive clamping member 11, which is conducive to maintaining the reinforcement effect of the reinforcement rod 13 on the conductive clamping member 11.

[0049] Reference Figure 4 , an elastic limiting structure 12 is provided on the inner side of the shell 1, and the elastic limiting structure 12 includes a first arch block 121 and a second arch block 122 integrally formed on the shell 1. A limiting portion 31 is provided at a right angle at one end of the fuse seat 3. The width of the elastic limiting structure 12 is not less than the width of the limiting portion 31. In this embodiment, the width of the elastic limiting structure 12 is preferably greater than the width of the limiting portion 31, so that the contact area between the elastic limiting structure 12 and the fuse seat 3 is large and the limiting effect is good. The first arch block 121 is located on the side of the second arch block 122 close to the limiting portion 31, and a limiting groove 123 is formed between the two for the limiting portion 31 to be engaged and extended. When the handle 2 is rotated toward the outside of the shell 1, one end of the fuse seat 3 can be engaged with the elastic limiting structure 12, thereby fixing the position of the fuse seat 3 and facilitating the disassembly and assembly of the fuse 4.

[0050] Reference Figure 4In order to reduce the risk of the conductive clamping member 11 being expanded by the fuse holder 3 and thus weakening its elasticity, a narrowing portion 32 is provided on the fuse holder 3. The width of the clamping groove 113 is greater than the width of the narrowing portion 32. When the fuse holder 3 is engaged with the elastic limiting structure 12, the narrowing portion 32 is located in the clamping groove 113. The narrowing portion 32 makes it difficult for the conductive clamping member 11 to be expanded by the fuse holder 3, which is conducive to maintaining the clamping force of the conductive clamping member 11 and extending the service life of the conductive clamping member 11.

[0051] The implementation principle of a fuse with a limiting structure in an embodiment of the present application is as follows: when in use, the handle 2 is first rotated toward the outside of the housing 1 so that the limiting portion 31 engages and extends into the limiting groove 123, thereby fixing the position of the fuse holder 3. At this time, the narrowed portion 32 is located in the clamping groove 113; the fuse 4 is then inserted into the positioning ring 33, and finally the handle 2 is rotated toward the inside of the housing 1 so that the conductive clamping member 11 contacts and clamps the fuse 4. When installing or removing the fuse 4, the fuse holder 3 is fixed by the mutual cooperation between the limiting portion 31 and the limiting groove 123, rather than by the clamping force of the conductive clamping member 11. Therefore, the conductive clamping member 11 is not easily deformed or even damaged by the fuse holder 3.

[0052] Example 2

[0053] Reference Figure 5 and Figure 6 The wall of the positioning hole 15 is provided with a snap-fit ​​portion 151 at one end, and a snap-fit ​​groove 21 is provided on the side wall of the handle 2 for the snap-fit ​​portion 151 to extend into. When the handle 2 is rotated so that the limiting portion 31 abuts against the elastic limiting structure 12, the snap-fit ​​portion 151 will abut against the wall of the snap-fit ​​groove 21; however, when the handle 2 is rotated toward the inside of the housing 1, the wall of the snap-fit ​​groove 21 will not interfere with the snap-fit ​​portion 151. When the fuse is vibrated by external force and the limiting portion 31 accidentally disengages from the limiting groove 123, the wall of the snap-fit ​​groove 21 can further restrict the fuse holder 3 from rotating toward the outside of the housing 1, which is beneficial to enhancing the stability of the fuse holder 3.

[0054] Reference Figure 7 and Figure 8, a connecting groove 152 is provided on the wall of the hole 15 in the circumferential direction, and a rubber pad 153 is detachably provided in the connecting groove 152. Specifically, the rubber pad 153 can be embedded in the connecting groove 152 by its own deformation, so as to realize its detachable connection with the shell 1. When the fuse 4 is installed in place, the rubber pad 153 will abut between the handle 2 and the shell 1, increasing the friction between the handle 2 and the shell 1, so that the stability of the fuse seat 3 is enhanced, and the fuse 4 is not easy to shake relative to the conductive clamp 11, playing a role in assisting the conductive clamp 11 to contact and clamp the fuse 4. In addition, the rubber pad 153 can also prevent external moisture from entering the interior of the shell 1 along the gap between the handle 2 and the shell 1, and has a good waterproof effect. When the rubber pad 153 is worn, the rubber pad 153 can also be directly removed from the connecting groove 152 to replace it with a new rubber pad 153, which is simple to operate.

[0055] The working principle of a fuse with a limiting structure in the embodiment of the present application is as follows: when removing or installing the fuse core 4, first rotate the handle 2 toward the outside of the housing 1. At this time, not only will the limiting portion 31 engage and extend into the limiting groove 123, but the engaging portion 151 will also abut against the groove wall of the engaging groove 21, thereby fixing the position of the fuse core holder 3. After installation, the handle 2 is rotated toward the inside of the housing 1, so that the conductive clamping member 11 contacts and clamps the fuse core 4. At this time, the rubber pad 153 abuts between the handle 2 and the housing 1, which helps to improve the stability of the fuse core holder 3.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A fuse with a limit structure, comprising a housing (1), a handle (2) rotatably arranged on the housing (1), a fuse holder (3) fixedly arranged on the handle (2), and a fuse (4) mounted on the fuse holder (3), wherein the housing (1) is provided with a conductive clamping member (11) for contacting and clamping both ends of the fuse (4), and wherein: An elastic limiting structure (12) is provided below the fuse seat (3) in the housing (1); when the handle (2) is rotated toward the outside of the housing (1), one end of the fuse seat (3) is clamped on the elastic limiting structure (12).

2. A fuse with a limiting structure according to claim 1, characterized in that: The elastic limiting structure (12) comprises a first arch block (121) and a second arch block (122); a limiting portion (31) is provided at one end of the fusible core seat (3); and a limiting groove (123) for the limiting portion (31) to be engaged and extended into is formed between the first arch block (121) and the second arch block (122).

3. The fuse with a limiting structure according to claim 2, characterized in that: The first arched block (121) and the second arched block (122) are both integrally formed on the housing (1).

4. The fuse with a limiting structure according to claim 2, characterized in that: The width of the first arch block (121) and the second arch block (122) is not less than the width of the limiting portion (31).

5. The fuse with a limiting structure according to claim 1, characterized in that: The fuse seat (3) is provided with a narrowing portion (32), and the conductive clamping member (11) includes a connecting portion (111) and two clamping portions (112) integrally formed on the same side of the connecting portion (111). A clamping groove (113) is formed between the connecting portion (111) and the two clamping portions (112), and the width of the clamping groove (113) is greater than the width of the narrowing portion (32); when the fuse seat (3) is engaged with the elastic limiting structure (12), the narrowing portion (32) is located in the clamping groove (113).

6. The fuse with a limiting structure according to claim 5, characterized in that: An elastic reinforcing rod (13) is provided in the housing (1), and the reinforcing rod (13) comprises a mounting portion (131) and two reinforcing portions (132) integrally formed on the same side of the mounting portion (131), wherein the two reinforcing portions (132) respectively abut against the sides of the two clamping portions (112) that are away from each other.

7. The fuse with a limiting structure according to claim 6, characterized in that: The housing (1) is provided with a mounting groove (14), and the mounting portion (131) is inserted into the mounting groove (14); the clamping portion (112) is provided with a plurality of groups of positioning members (114), each group of the positioning members (114) includes two positioning blocks (115) arranged opposite to each other, a positioning groove (116) is formed between the two positioning blocks (115) in the same positioning member (114), and the reinforcement portion (132) is inserted into the positioning groove (116).

8. The fuse with a limiting structure according to claim 1, characterized in that: A plurality of positioning rings (33) are provided on the fuse core seat (3), and the fuse core (4) is passed through each positioning ring (33).

9. The fuse with a limiting structure according to claim 1, characterized in that: The housing (1) is provided with a clearance hole (15) for allowing the handle (2) to be rotated out, a clamping portion (151) is provided at one end of a hole wall of the clearance hole (15), and a clamping groove (21) for allowing the clamping portion (151) to extend into is opened on a side wall of the handle (2), and when the fuse seat (3) is rotated to abut against the elastic limiting structure (12), the clamping portion (151) extends into the clamping groove (21).

10. The fuse with a limiting structure according to claim 9, characterized in that: A connecting groove (152) is circumferentially provided on the hole wall of the clearance hole (15), and a rubber pad (153) is detachably provided in the connecting groove (152). The rubber pad (153) abuts against the handle (2) when the conductive clamping member (11) contacts the clamping fuse (4).

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