Fuse tube seat

Abstract

The utility model provides a fuse tube socket, which comprises a base, a first conducting strip, a second conducting strip, a fuse and an upper cover, the upper cover comprises a conductive metal material, after the fuse is installed in place, the first pole of the fuse is electrically connected with the first conducting strip, the second pole of the fuse is electrically connected with the upper cover, and the first conducting strip is electrically connected with the second conducting strip. The second conducting strip comprises a first part and a second part which are connected with each other, the first part is clamped with the base, the second part is clamped with the upper cover, and the second conducting strip is electrically connected with the upper cover through the second part, so that the upper cover is stably connected with the base, and meanwhile, the second conducting strip is electrically connected with the upper cover through the second part. And the fuse is convenient to maintain and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial control, in particular to a fuse tube holder. Background Art

[0002] With the rapid development of the industrial control industry, the application of fuses in the field of industrial power safety has become increasingly important. Fuses mainly play an overload protection role in circuits. Therefore, improving the convenience of fuse replacement while ensuring power safety has attracted more and more attention from users.

[0003] Many current fuse holders directly fix the fuse on the fuse holder, and it is extremely cumbersome to replace the fuse after it is damaged. There is also a structure disclosed in the patent document CN 216671545U that adopts a screw connection assembly of the holder, but there are defects such as cumbersome installation process and low reliability. In addition, the metal connection terminal is only connected to the copper sleeve cover through its annular top outer wall, which also has the defects of small contact area and large contact resistance ohm value. At the same time, the reliability of the ohm connection between the metal parts is low. Utility Model Content

[0004] Therefore, in view of at least one of the above problems, the utility model provides a fuse holder.

[0005] The utility model is implemented by the following scheme:

[0006] The utility model provides a fuse tube holder, comprising a base, a first conductive sheet, a second conductive sheet, a fuse and an upper cover, wherein the upper cover comprises a conductive metal material, and after the fuse is installed in place, the first pole of the fuse is electrically connected to the first conductive sheet, and the second pole of the fuse is electrically connected to the upper cover, and is characterized in that the second conductive sheet comprises a first part and a second part connected to each other, the first part is fixed to the base, the second part is clamped to the upper cover, and the second conductive sheet is electrically connected to the upper cover through the second part.

[0007] In one embodiment, the upper cover includes a cylindrical body and a snap-fit ​​block protruding outward from the lower edge of the cylindrical body; the second part is a cylindrical tightening spring piece, and the cylindrical tightening spring piece is provided with a yielding portion for the snap-fit ​​block to be inserted into and a snap-fit ​​interface for corresponding snap-fit ​​assembly with the snap-fit ​​block, and the snap-fit ​​block can be snap-fitted with the snap-fit ​​interface.

[0008] In one embodiment, the evacuation portion is a strip-shaped notch formed axially on the cylindrical tightening spring piece, so that the cross-section of the cylindrical tightening spring piece is C-shaped.

[0009] In one embodiment, the number of the clamping blocks is 2 and they are evenly distributed on the outer circumference of the lower edge of the cylindrical body, and the number of the clamping interfaces is equal to the number of the clamping blocks.

[0010] In one embodiment, the second portion is a cylindrical tightening spring piece, and when the upper cover is installed in place, the inner side wall of the cylindrical tightening spring piece is in abutment with the outer surface of the upper cover.

[0011] In one embodiment, the first part is snap-fitted with the base to be fixed to the base; the first part includes a second conductive sheet body in a long strip shape, and a snap-fit ​​folding piece is provided on the second conductive sheet body; a snap-fitting groove corresponding to the snap-fitting folding piece is provided on the side wall of the base, and when the second conductive sheet is installed on the base, the snap-fitting folding piece is snap-fitted with the snap-fitting groove.

[0012] In one embodiment, a second mounting groove for mounting the second conductive sheet is provided on the base, the shape of the second mounting groove is adapted to the second conductive sheet body of the second conductive sheet, and the second mounting groove is connected to the snap-in groove, thereby forming a T-shaped groove structure on the bottom surface of the base.

[0013] In one embodiment, a protective edge is formed on the inner side of the edge of the upper end of the base, and the protective edge is a flange structure formed by protruding inward from the edge of the upper end of the base.

[0014] In one embodiment, a spring is provided in the inner cavity of the upper cover, and the spring is slidably connected to the inner cavity of the upper cover. After the upper cover is installed in place, one end of the spring abuts against the bottom surface of the inner cavity of the upper cover, and the other end of the spring abuts against the second pole of the fuse, and the spring is a conical spring.

[0015] In one embodiment, a reed is sleeved in the inner cavity of the upper cover, and the inner diameter of the reed matches the outer diameter of the fuse, so that the reed can be sleeved around the fuse.

[0016] In one embodiment, the first conductive sheet comprises a first conductive sheet body, a boss is protruding from the first conductive sheet body, and when the first conductive sheet is mounted on the bottom surface of the base, the boss is located at the center of the bottom surface of the base.

[0017] In one embodiment, an outer cover is sleeved on the outside of the upper cover, and the outer cover is made of insulating material; the upper cover and the outer cover are fixedly connected by glue dispensing.

[0018] The technical solution provided by the utility model has the following technical effects:

[0019] 1. The fuse holder of the utility model, wherein the second conductive sheet comprises a first part and a second part connected to each other, wherein the first part is fixed to the base, the second part is snap-fitted to the upper cover, and the second conductive sheet is electrically connected to the upper cover through the second part, thereby forming a stable connection between the upper cover and the base and facilitating the repair and replacement of the fuse.

[0020] 2. In the fuse holder of the utility model, the second part of the second conductive sheet is further designed as a cylindrical tightening spring sheet that matches the shape of the upper cover, so that after being snapped into the upper cover, the inner side wall of the cylindrical tightening spring sheet and the outer surface of the upper cover can achieve a larger area of ​​inner surface and outer surface abutment contact, thereby making the contact area between the second conductive sheet and the upper cover larger. Compared with other methods that only rely on the top outer wall surface contact, the surface contact method of this embodiment makes the conductive effect better.

[0021] 3. In the fuse tube holder of the utility model, the second installation slot is connected with the snap-in slot, so that a T-slot structure is formed on the bottom surface of the base. Such an arrangement allows the connection point where the second installation slot is connected with the snap-in slot to be located at the second pin, so that when the second conductive sheet is inserted and snap-into the base, the second pin is easier to pass through the second installation slot, and the second conductive sheet is easier to be installed in place on the base. As a result, the second conductive sheet and the base do not need to achieve high assembly accuracy, which increases assembly efficiency and reduces processing costs. In addition, when the second conductive sheet is installed in the second installation slot, and the snap-in folding piece is snap-fitted with the snap-in slot, the base can form a limit on the six degrees of freedom of the second conductive sheet, that is, the base can completely limit the second conductive sheet, so that the second conductive sheet is more firmly installed on the base.

[0022] 4. In the fuse holder of the utility model, the first part of the second conductive sheet is snap-fitted with the base, and the second part is snap-fitted with the upper cover, so that the entire fuse holder can be assembled quickly and reliably, replacing the original method of spiral assembly. Not only is the installation process relatively simple, but the reliability is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the fuse holder;

[0024] Figure 2 This is an exploded view of the fuse holder;

[0025] Figure 3 is a three-dimensional diagram of a second conductive sheet;

[0026] Figure 4 is a three-dimensional diagram of a first conductive sheet;

[0027] Figure 5 It is a three-dimensional picture of the upper cover;

[0028] Figure 6 It is a three-dimensional diagram of the assembly of the upper cover and the outer cover;

[0029] Figure 7 It is a stereogram of the upper cover assembly and the fuse assembly;

[0030] Figure 8 is a stereoscopic diagram of the assembly of the base and the first conductive sheet;

[0031] Fig. 9 It is a stereogram of the base assembly assembly;

[0032] Fig.10 is a top view of the second conductive sheet;

[0033] Fig.11 FIG. 4 is a top view of another embodiment of the second conductive sheet. DETAILED DESCRIPTION

[0034] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0035] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figure 1-9 As shown, this embodiment provides a fuse tube holder, including a base 10, a first conductive sheet 20, a second conductive sheet 30, a fuse 40, a reed sheet 50, a spring 60, an upper cover 70 and an outer cover 80. The base 10 is a cylindrical structure made of an insulating material. The first conductive sheet 20 includes a first conductive sheet body 21, on which a boss 22 protrudes, and the first conductive sheet body 21 is also connected to a first pin 23. When the first conductive sheet 20 is installed on the bottom surface of the base 10, the boss 22 is located at the center of the bottom surface of the base 10, and the first pin 23 protrudes from the bottom surface of the base 10. Therefore, when the fuse 40 is installed in the base 10, the lower end electrode of the fuse 40 contacts the boss 22. At this time, the lower end electrode of the fuse 40 is electrically connected to the first conductive sheet 20 and is led out of the base 10 by the first pin 23.

[0037] like Figure 2-3As shown, the second conductive sheet 30 includes a first portion 31 and a second portion 32 connected to each other, and the first portion 31 is fixed to the base 10. For example, the fixing method includes but is not limited to fixing by glue dispensing, or the base 10 and the first portion 31 of the second conductive sheet 30 are integrally molded by injection, or fixed by screw thread locking, etc. In this embodiment, the first portion 31 is fixed to the base 10 by being snap-fitted to the base 10. The first part 31 includes a second conductive sheet body 311 in an elongated shape, a snap-fit ​​folded piece 312 is provided on the second conductive sheet body 311, a second pin 313 is provided at the lower end of the second conductive sheet body 311, and a snap-fit ​​groove 11 corresponding to the snap-fit ​​folded piece 312 is provided on the side wall of the base 10, so that when the second conductive sheet 30 is installed on the base 10, the snap-fit ​​folded piece 312 is snap-fitted with the snap-fit ​​groove 11, so that the second conductive sheet 30 is fixed on the base 10, and the second conductive sheet body 311 is arranged against the side wall of the base 10, and the second pin 313 protrudes out of the bottom surface of the base 10.

[0038] The second part 32 of the second conductive sheet 30 is snapped with the upper cover 70. When the second part 32 of the second conductive sheet 30 is snapped with the upper cover 70, the second conductive sheet 30 is electrically connected with the upper cover 70. The upper cover 70 is a cylindrical structure, and the upper cover 70 contains a conductive metal material, for example, copper. The second part 32 is a cylindrical tightening spring sheet, and the side wall of the cylindrical tightening spring sheet is connected with the first part 31. When the upper cover 70 is installed in place, the inner side wall of the cylindrical tightening spring sheet of the second part 32 abuts against the outer surface of the upper cover 70, so that the contact area between the second conductive sheet 30 and the upper cover 70 is larger. Compared with other methods of only conducting and contacting with the copper sleeve upper cover through its annular top outer wall, the surface contact method of this embodiment makes the contact area larger, and the inner side wall of the cylindrical tightening spring sheet and the outer surface of the upper cover achieve a larger area of ​​inner surface and outer surface abutting contact, and the conductive effect is better.

[0039] like Figure 2-3 As shown, the inner cavity of the upper cover 70 is provided with a spring 60, and the spring 60 is slidably connected to the inner cavity of the upper cover 70. After the upper cover 70 is installed in place, one end of the spring 60 abuts against the bottom surface of the inner cavity of the upper cover 70, and the other end of the spring 60 abuts against the upper electrode of the fuse 40, so that the upper cover 70 is electrically connected to the upper electrode of the fuse 40. And after the upper cover 70 is installed in place, the spring 60 is in a compressed state, and the spring 60 squeezes the fuse 40, thereby improving the reliability of the connection between the two end electrodes of the fuse 40 and the first conductive sheet 20 and the upper cover 70 respectively. Since the second part 32 of the second conductive sheet 30 is snap-fitted and electrically conductive with the upper cover 70, the two end electrodes of the fuse 40 are electrically conductive with the first conductive sheet 20 and the second conductive sheet 30 respectively, thereby forming a connection circuit.

[0040] like Figure 2-5As shown, the upper cover 70 includes a cylindrical body 71 and a clamping block 72 protruding outward from the lower edge of the cylindrical body 71. In this embodiment, the number of the clamping blocks 72 is 2. A clamping interface 321 corresponding to the clamping block 72 is provided on the second part 32 of the second conductive sheet 30. After the upper cover 70 is installed in place, the clamping block 72 and the clamping interface 321 are engaged with each other, so that the upper cover 70 and the second conductive sheet 30 are mutually engaged. Since the second conductive sheet 30 is engaged with the base 10, the upper cover 70 and the base 10 are firmly connected, and the maintenance and replacement of the fuse are also convenient. In this embodiment, the number of the clamping blocks 72 is 2, and they are evenly distributed on the outer circumference of the lower edge of the cylindrical body 71. Correspondingly, the number of the clamping interfaces 321 is equal to the number of the clamping blocks 72, which is also 2.

[0041] like Figure 2-3 and Fig.10 As shown, a clearance portion 33 for the clamping block 72 to be inserted into is also provided on the second part 32 of the second conductive sheet 30, and the clearance portion 33 is a strip-shaped notch 33 axially formed on the cylindrical tightening spring piece, so that the cross-section of the cylindrical tightening spring piece is C-shaped.

[0042] like Fig.11 As shown, in some embodiments, the yielding portion 33 may also be a diameter-enlarged portion 33 ′ formed on the cylindrical clamping spring sheet of the second portion 32 of the second conductive sheet 30 , and the diameter-enlarged portion 33 ′ can allow the clamping blocks 72 to pass through and the number of the diameter-enlarged portion 33 ′ is equal to that of the clamping blocks 72 .

[0043] Preferably, the spring 60 is a conical spring, so that the spring 60 can be compressed to a smaller length, making the overall volume of the fuse holder smaller and improving space utilization.

[0044] like Figure 2-3 As shown, in this embodiment, a spring 50 is sleeved in the inner cavity of the upper cover 70 , and the inner diameter of the spring 50 matches the outer diameter of the fuse 40 . The spring 50 can be sleeved around the fuse 40 , thereby limiting the position of the fuse 40 .

[0045] Preferably, a protective edge 12 is formed on the inner side of the edge of the upper end of the base 10. The protective edge 12 is a flange structure formed by protruding inward from the edge of the upper end of the base 10. The protective edge 12 can prevent the second conductive sheet 30 from being accidentally touched and lifted up during the assembly process, thereby greatly reducing the difficulty of assembly.

[0046] like Figure 2-3 and Figure 8As shown, a first mounting groove 13 for mounting the first conductive sheet 20 and a second mounting groove 14 for mounting the second conductive sheet 30 are provided on the base 10. The shape of the second mounting groove 14 is adapted to the elongated second conductive sheet body 311 of the second conductive sheet 30. In this embodiment, the cross section of the second mounting groove 14 is arc-shaped, and the second conductive sheet body 311 also has an adapted arc-shaped cross section. In other embodiments, the second mounting groove 14 and the second conductive sheet body 311 may also have cross sections of other shapes, such as a straight shape. In this embodiment, the second mounting groove 14 and the second conductive sheet body 311 with an arc-shaped cross section enable the second conductive sheet body 311 to fit more closely to the side wall of the inner cavity of the base 10, thereby achieving a higher space utilization rate.

[0047] like Figure 2-3 and Figure 8 As shown, the second mounting groove 14 is connected with the clamping groove 11, so as to form a T-shaped groove structure on the bottom surface of the base 10. Such a configuration allows the second mounting groove 14 and the clamping groove 11 to be connected at the second pin 313, so that when the second conductive sheet 30 is inserted and clamped on the base 10, the second pin 313 is easier to pass through the second mounting groove 14, and the second conductive sheet 30 is easier to be installed in place on the base 10. In this way, the second conductive sheet 30 and the base 10 do not need to achieve high assembly accuracy, which increases assembly efficiency and reduces processing costs.

[0048] When the second conductive sheet 30 is installed in the second installation groove 14 and the snap-fit ​​folding piece 312 is snap-fitted with the snap-fitting groove 11, the base 10 can limit the six degrees of freedom of the second conductive sheet 30, that is, the base 10 can completely limit the second conductive sheet 30, so that the second conductive sheet 30 is more firmly installed on the base 10.

[0049] like Figure 1-7 As shown, in this embodiment, an outer cover 80 is sleeved on the outer side of the upper cover 70, and the outer cover 80 is made of an insulating material, such as plastic. The outer cover 80 is sleeved on the outer side of the upper cover 70 to increase the insulation performance of the fuse holder and improve the safety of the circuit. The upper cover 70 and the outer cover 80 are fixedly connected, for example, by dispensing glue to fix the upper cover 70 and the outer cover 80.

[0050] The assembly process of the fuse holder provided in this embodiment is as follows:

[0051] 1. As Figure 6 As shown, glue is dispensed and cured between the upper cover 70 and the outer cover 80, and then the spring 60 and the spring leaf 50 are sequentially installed into the upper cover 70 to form an upper cover assembly;

[0052] 2. If Figure 7 As shown, the fuse 40 is installed into the upper cover assembly.

[0053] 3. Such as Figure 8 As shown, the first conductive sheet 20 is installed into the base 10 and riveted to the bottom surface of the base 10 .

[0054] 4. Such as Fig. 9 As shown, the second conductive sheet 30 is installed into the base 10 to form a base assembly, wherein the snap-fitting folding piece 312 is snap-fitted with the snap-fitting groove 11, so that the second conductive sheet 30 can be snap-fitted to the base 10, and can be conveniently and reliably fixed.

[0055] 5. Assemble the upper cover assembly and the base assembly to form a fuse holder.

[0056] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A fuse holder, comprising a base, a first conductive sheet, a second conductive sheet, a fuse and an upper cover, wherein the upper cover comprises a conductive metal material, and after the fuse is installed in place, the first pole of the fuse is electrically connected to the first conductive sheet, and the second pole of the fuse is electrically connected to the upper cover, characterized in that: The second conductive sheet includes a first portion and a second portion connected to each other, the first portion is fixed to the base, the second portion is snap-fitted to the upper cover, and the second conductive sheet is electrically connected to the upper cover via the second portion.

2. The fuse holder according to claim 1, characterized in that: The upper cover includes a cylindrical body and a clamping block protruding outward from the lower edge of the cylindrical body; the second part is a cylindrical tightening spring piece, and the cylindrical tightening spring piece is provided with a yielding portion for the clamping block to be inserted into and a clamping interface for corresponding clamping assembly with the clamping block, and the clamping block can be clamped with the clamping interface.

3. The fuse holder according to claim 2, characterized in that: The evacuation portion is a strip-shaped notch formed axially on the cylindrical tightening spring piece, so that the cross section of the cylindrical tightening spring piece is C-shaped.

4. The fuse holder according to claim 2, characterized in that: The number of the clamping blocks is 2 and they are evenly distributed on the outer circumference of the lower edge of the cylinder body. The number of the clamping interfaces is equal to the number of the clamping blocks.

5. The fuse holder according to claim 1, characterized in that: The second part is a cylindrical tightening spring piece. When the upper cover is installed in place, the inner side wall of the cylindrical tightening spring piece is in abutment with the outer surface of the upper cover.

6. The fuse holder according to claim 1, characterized in that: The first part is snap-fitted with the base so as to be fixed to the base; the first part includes a second conductive sheet body in an elongated shape, on which a snap-fit ​​folding piece is provided; a snap-fitting groove corresponding to the snap-fitting folding piece is provided on the side wall of the base, and when the second conductive sheet is installed on the base, the snap-fitting folding piece is snap-fitted with the snap-fitting groove.

7. The fuse holder according to claim 6, characterized in that: A second mounting groove for mounting the second conductive sheet is provided on the base, the shape of the second mounting groove is adapted to the second conductive sheet body of the second conductive sheet, and the second mounting groove is connected to the snap-in groove, thereby forming a T-shaped groove structure on the bottom surface of the base.

8. The fuse holder according to claim 1, characterized in that: A protective edge is formed on the inner side of the edge of the upper end of the base, and the protective edge is a flange structure formed by the edge of the upper end of the base protruding inward.

9. The fuse holder according to claim 1, characterized in that: The inner cavity of the upper cover is provided with a spring, and the spring is slidably connected to the inner cavity of the upper cover. After the upper cover is installed in place, one end of the spring abuts against the bottom surface of the inner cavity of the upper cover, and the other end of the spring abuts against the second pole of the fuse. The spring is a conical spring.

10. The fuse holder according to claim 1, characterized in that: A reed is sleeved in the inner cavity of the upper cover, and the inner diameter of the reed matches the outer diameter of the fuse, so that the reed can be sleeved around the fuse.

11. The fuse holder according to claim 1, characterized in that: The first conductive sheet comprises a first conductive sheet body, on which a boss protrudes. When the first conductive sheet is mounted on the bottom surface of the base, the boss is located at the center of the bottom surface of the base.

12. The fuse holder according to claim 1, characterized in that: An outer cover is sleeved on the outside of the upper cover, and the outer cover is made of insulating material; the upper cover and the outer cover are fixedly connected by glue dispensing.

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