Terminal block with detachable and replaceable fuse

Abstract

A wiring cavity is formed in an insulating shell, a fuse socket communicated with the wiring cavity is further arranged on the side wall of the insulating shell, a fuse terminal comprises a terminal body, a terminal weld leg and a terminal current-conducting plate, the terminal body is fixedly positioned in the insulating shell, and the terminal weld leg is connected with the terminal current-conducting plate. The terminal welding legs extend out of the outer side of the insulating shell and can be welded on the circuit board, the terminal conductive plate of the fuse terminal is accommodated in the wiring cavity, the clamping conduction mechanism comprises a clamping end and an operating end, the clamping end of the clamping conduction mechanism is accommodated in the wiring cavity, the operating end extends out of the outer side of the insulating shell, and the fuse can be inserted into the fuse socket. The pin of the fuse can extend into the wiring cavity, the operation end of the clamping conduction mechanism can drive the clamping end to act to clamp the conductive plate of the fuse terminal and the pin of the fuse so as to realize conduction between the conductive plate and the pin of the fuse, the replacement of the damaged fuse in the terminal block is realized, the use cost is saved for a terminal customer, and the field maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a connector, in particular to a terminal block with a detachable fuse. Background Art

[0002] On existing terminal blocks, the fuse terminals and fuse pins are fixed together. After the two are fixedly assembled together, they are fixedly enclosed in the terminal block's insulating housing. The fuse in this terminal block cannot be removed from the terminal block. If the fuse burns out or is damaged, the entire terminal block must be replaced, resulting in high terminal block costs and a large amount of wasted parts. When in use, the fuse is completely enclosed in the insulating housing, making it impossible to observe the fuse, the connection between the fuse pins and the fuse terminals, and even adjustment impossible. If the connection between the fuse pins and the fuse terminals becomes loose, the entire terminal block will be scrapped. Utility Model Content

[0003] In order to make up for the above deficiencies, the present invention provides a terminal block with a detachable fuse, which saves use costs and improves on-site maintenance efficiency.

[0004] The utility model adopts the following technical solution to solve its technical problems: a terminal block with a detachable fuse, comprising an insulating shell, a fuse terminal, a clamping and conducting mechanism and a fuse, wherein a wiring cavity is formed in the insulating shell, and a fuse socket communicating with the wiring cavity is further provided on a side wall of the insulating shell, the fuse terminal comprises a terminal body, a terminal welding foot and a terminal conductive plate, the terminal body is fixedly positioned in the insulating shell, the terminal welding foot extends out of the insulating shell and can be welded to a circuit board, the terminal conductive plate of the fuse terminal is accommodated in the wiring cavity, the clamping and conducting mechanism comprises a clamping end and an operating end, the clamping end of the clamping and conducting mechanism is accommodated in the wiring cavity, the operating end extends out of the insulating shell, the fuse can be inserted into the fuse socket, the pin of the fuse can be extended into the wiring cavity, and the operating end of the clamping and conducting mechanism can drive the clamping end to clamp the conductive plate of the fuse terminal and the pin of the fuse to achieve conduction between the two.

[0005] As a further improvement of the present invention, the clamping and conducting mechanism includes a junction box and a screw. The junction box is fixedly accommodated in the wiring cavity of the insulating shell. A wiring channel is formed in the junction box. The terminal conductive plate of the fuse terminal is inserted into the wiring passage of the junction box. The pin of the fuse can also be inserted into the wiring passage of the junction box, and the pin of the fuse and the terminal conductive plate of the fuse terminal are in an overlapping insertion state. A threaded hole is also provided on the side wall of the junction box. The protective screw is movably screwed into the threaded hole on the side wall of the junction box. The end of the screw can be tightly pressed against the pin of the fuse or the terminal wire plate of the wiring terminal so that the two are in close contact. The head of the screw forms the operating end of the clamping and conducting mechanism.

[0006] As a further improvement of the present invention, a screw socket communicating with the wiring cavity is provided on the side wall of the insulating shell, and the head of the screw is accommodated in the screw socket.

[0007] As a further improvement of the present invention, the terminal conductive plate of the fuse terminal forms a cantilever structure, and a gap is formed between the terminal conductive plate and a side wall inside the wiring channel for inserting the fuse pin. The end of the screw is pressed against the side of the terminal conductive plate facing away from the gap, thereby reducing the gap size and clamping the fuse pin.

[0008] As a further improvement of the present invention, a guiding slope is provided on the end portion of the free end of the terminal conductive plate facing the gap.

[0009] As a further improvement of the present invention, the junction box is a square box, and the junction cavity in the insulating shell is a square cavity matching the square box.

[0010] As a further improvement of the present invention, the insulating shell includes an insulating base and an insulating upper cover, the insulating base is provided with a wiring groove, the bottom of the wiring groove is provided with a terminal body accommodating groove for accommodating the terminal body and a welding foot through-hole for the terminal welding foot to extend, the wiring box can be inserted into the wiring groove, and the wiring box is stopped on the opening of the terminal body accommodating groove so that the terminal body is fixedly positioned in the terminal accommodating groove, the insulating upper cover can be fixedly covered on the wiring groove opening of the insulating base so that the wiring box is fixedly positioned in the wiring groove, and a penetrating fuse socket is formed in the insulating upper cover, the fuse socket can be connected to the wiring groove, and the wiring groove covered by the insulating upper cover forms a wiring cavity.

[0011] As a further improvement of the present invention, the insulating upper cover is further provided with a hook of a cantilever structure, and the side wall of the wiring slot is further provided with a slot. When the insulating upper cover is covered on the insulating base, the hook on the insulating upper cover is clamped in the slot of the wiring slot to realize a fixed buckle connection between the insulating upper cover and the insulating base.

[0012] As a further improvement of the present invention, the insulating housing is further provided with a hollow structure or a transparent peep window, through which the state of the fuse pin after being locked in place can be observed.

[0013] As a further improvement of the present invention, a finger-avoiding notch is formed at the opening of the fuse socket of the insulating housing for inserting and removing the fuse.

[0014] The beneficial technical effect of the present invention is that the present invention realizes close contact and conduction between the terminal conductive plate of the fuse terminal and the pin of the fuse through the clamping conduction mechanism, and realizes a detachable installation structure of the fuse on the terminal block. When the terminal block is used and the fuse is burned out or blown, the fuse inside the terminal block can be quickly replaced on site without disassembling and replacing the entire terminal block, which saves the use cost for the end customer and improves the on-site maintenance efficiency. The contact area between the pin of the fuse and the terminal conductive plate of the fuse terminal of the present invention is small, so that the loop impedance value of the entire fuse is smaller and more stable, and it is easier to achieve the sensitivity of signal transmission, ensuring that the fuse can more easily realize its function in the environment. During the welding process of the product of the present invention, the fuse is not easily burned by the heat energy transmitted from the high temperature. The structure of the present invention protects the fuse from burning out in the high-temperature welding environment, thereby improving the sensitivity of the terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the terminal block in the prior art;

[0016] Figure 2 This is a stereoscopic diagram of the fixed assembly state of the fuse terminal and the fuse in the prior art;

[0017] Figure 3 This is a three-dimensional exploded view of the utility model;

[0018] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0019] Figure 5 It is a three-dimensional diagram of the utility model;

[0020] Figure 6 This is the main view of the utility model;

[0021] Figure 7 It is a right side view of the utility model;

[0022] Figure 8 It is a top view of the utility model;

[0023] Figure 9 This is a three-dimensional diagram of the detachable assembly structure of the fuse terminal and the fuse of the utility model;

[0024] Figure 10 This is a three-dimensional exploded view of the detachable assembly structure of the fuse terminal and the fuse of the present invention;

[0025] Figure 11 This is a front view of the detachable assembly structure of the fuse terminal and fuse of the utility model;

[0026] Figure 12 for Figure 11 Middle BB section view. DETAILED DESCRIPTION

[0027] Embodiment: A terminal block with a removable fuse includes an insulating shell 1, a fuse terminal 2, a clamping and conducting mechanism and a fuse 3. A wiring cavity is formed in the insulating shell 1, and a fuse socket 11 connected to the wiring cavity is further provided on the side wall of the insulating shell 1. The fuse terminal 2 includes a terminal body 21, a terminal welding foot 22 and a terminal conductive plate 23. The terminal body 21 is fixedly positioned in the insulating shell 1, the terminal welding foot 22 extends out of the outside of the insulating shell 1 and can be welded to a circuit board. The terminal conductive plate 23 of the fuse terminal 2 is accommodated in the wiring cavity. The clamping and conducting mechanism includes a clamping end and an operating end. The clamping end of the clamping and conducting mechanism is accommodated in the wiring cavity, and the operating end extends out of the insulating shell 1. The fuse 3 can be inserted into the fuse socket 11, and the pin 31 of the fuse 3 can be extended into the wiring cavity. The operating end of the clamping and conducting mechanism can drive the clamping end to clamp the conductive plate of the fuse terminal 2 and the pin 31 of the fuse 3 to achieve conduction between the two.

[0028] The pin 31 of the fuse 3 is in close contact with the terminal conductive plate 23 of the fuse terminal 2 by the clamping conduction mechanism, thereby transmitting the signal. When the pin 31 of the fuse 3 is in close contact with the terminal conductive plate 23 of the fuse terminal 2, the fuse 3 works normally to sense the temperature change of the product or the environment. When the temperature at which the fuse 3 melts is reached, the system will alarm or protect other equipment. When the fuse 3 burns out, there is no need to replace the entire terminal block. Only a new fuse 3 is needed to enable the terminal block to continue to be used. After the new fuse 3 is replaced, it continues to monitor the product temperature and the surrounding environment, and plays the role of a fuse alarm at any time. The above structure realizes that the fuse 3 can be When burned or damaged, the fuse 3 can be replaced without disassembling the entire terminal block, thus reducing maintenance costs and improving maintenance efficiency. In addition, the connection structure between the fuse 3 and the fuse terminal 2 can reduce the impedance of the entire circuit in which the fuse 3 is located, making signal transmission more stable and more sensitive, thereby ensuring that the fuse 3 can more easily perform its function in the environment. Furthermore, since the contact area between the pin 31 of the fuse 3 and the terminal conductive plate 23 of the fuse terminal 2 is small, the high temperature generated by the welding of the terminal block is not easily transmitted to the fuse 3, thereby preventing the fuse 3 from burning out due to the heat energy generated by the terminal block welding. This structure protects the fuse 3 from burning out in a high-temperature welding environment.

[0029] The clamping conduction mechanism includes a junction box 4 and a screw 5. The junction box 4 is fixedly accommodated in the wiring cavity of the insulating housing 1. A wiring channel 42 is formed in the junction box 4. The terminal conductive plate 23 of the fuse terminal 2 is inserted into the wiring passage of the junction box 4. The pin 31 of the fuse 3 can also be inserted into the wiring passage of the junction box 4, and the pin 31 of the fuse 3 and the terminal conductive plate 23 of the fuse terminal 2 are in an overlapping insertion state. A threaded hole 41 is also provided on the side wall of the junction box 4. The protective screw 5 is movably screwed into the threaded hole 41 on the side wall of the junction box 4. The end of the screw 5 can be tightly pressed against the pin 31 of the fuse 3 or the terminal wire plate of the wiring terminal so that the two are in close contact. The head of the screw 5 forms the operating end of the clamping conduction mechanism. By turning the screw 5, the head of the screw 5 and the inner wall of the junction box 4 are clamped or loosened to the terminal conductive plate 23 and the pin 31 of the fuse 3. The structure is simple and the operation is convenient. In addition, the clamping end of the clamping conductive mechanism can also be a spring clip, which elastically clamps or loosens the pin 31 of the fuse 3 through the spring clip and the terminal conductive plate 23. The operating end of the clamping conductive mechanism can be a push-pull rod that drives the elastic deformation of the spring clip. The clamping conductive mechanism can also be a conical inner sleeve and a conical outer sleeve. The conical outer sleeve slides on the outside of the conical inner sleeve, forcing the inner diameter of the conical inner sleeve to change and clamp or loosen the terminal conductive plate 23 and the pin 31 of the fuse 3 therein. This type of equivalent replacement structure is easily conceivable by those skilled in the art based on the technical solution of this patent and falls within the scope of protection of this patent.

[0030] The side wall of the insulating housing 1 is provided with a screw socket 12 that communicates with the wiring cavity. The head of the screw 5 is accommodated in the screw socket 12. The head of the screw 5 is hidden in the screw socket 12 to prevent the screw 5 from being accidentally rotated during use of the terminal block, thereby preventing the terminal conductive plate 23 from being loosened from the pin 31 of the fuse 3 due to accidental contact.

[0031] The terminal conductive plate 23 of the fuse terminal 2 forms a cantilever structure, forming a gap between it and a side wall inside the wiring channel 42 for the pin 31 of the fuse 3 to be inserted. The end of the screw 5 abuts against the side of the terminal conductive plate 23 facing away from the gap, thereby reducing the size of the gap and clamping the pin 31 of the fuse 3. The terminal conductive plate 23 adopts a cantilever structure that can elastically swing. When not subjected to external force, it adheres to the other side wall inside the wiring channel 42 of the junction box 4, maintaining a maximum gap between it and the side wall inside the wiring channel 42, facilitating smooth insertion of the pin 31 of the fuse 3. When the screw 5 is rotated, the end of the screw 5 elastically deforms against the terminal conductive plate 23, clamping the pin 31 of the fuse 3, ensuring close contact between the two. This structure facilitates rapid installation and removal of the fuse 3. Alternatively, the terminal conductive plate 23 can be fixed in place within the wiring channel 42, with the screw 5 pressing against the pin 31 of the fuse 3 to achieve contact and conduction between the two. Such equivalent replacement structures are readily conceivable by those skilled in the art based on the technical solution of this patent and fall within the scope of protection of this patent.

[0032] The free end of the terminal conductive plate 23 is provided with a guide slope 231 on the side facing the gap. The guide slope 231 guides the position of the pin 31 of the fuse 3 when it is inserted, ensuring that the pin 31 of the fuse 3 is smoothly inserted into the gap.

[0033] The junction box 4 is a square box, and the wiring cavity within the insulating housing 1 is a square cavity that matches the square box. The combination of the square box and the square cavity prevents the junction box 4 from rotating within the wiring cavity, ensuring smooth installation and removal of the fuse 3. In addition to being a square box, the junction box 4 can also have other shapes, and the designer can design it according to actual conditions.

[0034] The insulating shell 1 includes an insulating base 13 and an insulating upper cover 14. The insulating base 13 is provided with a wiring groove 131. The bottom of the wiring groove 131 is provided with a terminal body 21 accommodating groove for accommodating the terminal body 21 and a welding foot through-hole for the terminal welding foot 22 to extend. The junction box 4 can be inserted into the wiring groove 131, and the junction box 4 is stopped on the opening of the terminal body 21 accommodating groove so that the terminal body 21 is fixedly positioned in the terminal accommodating groove. The insulating upper cover 14 can be fixedly covered on the opening of the wiring groove 131 of the insulating base 13 so that the junction box 4 is fixedly positioned in the wiring groove 131. A through fuse socket 11 is formed in the insulating upper cover 14. The fuse socket 11 can be communicated with the wiring groove 131. The wiring groove 131 covered by the insulating upper cover 14 forms a wiring cavity.

[0035] The insulating housing 1 adopts a split structure. During assembly, the fuse terminal 2 is first installed in the wiring slot 131 so that it enters the terminal accommodating slot, and then the square box is installed. The square box is pressed on the terminal body 21 of the fuse terminal 2, and the terminal conductive plate 23 of the fuse terminal 2 is inserted into the square box. Then the screw 5 is installed, and the insulating upper cover 14 is pressed in. The square box is pressed to fix the square box. Finally, the fuse 3 is installed and the pin 31 of the fuse 3 and the terminal conductive plate 23 of the fuse terminal 2 are locked by turning the screw 5. This structure is easy to assemble.

[0036] The insulating upper cover 14 is also provided with a hook of a cantilever structure, and the side wall of the wiring groove 131 is also provided with a slot 132. When the insulating upper cover 14 is covered on the insulating base 13, the hook on the insulating upper cover 14 is locked in the slot 132 of the wiring groove 131 to achieve a fixed buckle connection between the insulating upper cover 14 and the insulating base 13.

[0037] The insulating housing 1 is further provided with a hollow structure or a transparent peep window 15, through which the state of the pin 31 of the fuse 3 after being locked in place can be observed. The peep window 15 can be used to observe the state of the fuse 3 after being locked in place to prevent it from not being locked in place or being loose.

[0038] The opening of the fuse socket 11 of the insulating housing 1 is formed with a finger-avoiding notch 111 for inserting and removing the fuse 3 , thereby facilitating installation and removal of the fuse 3 .

Claims

1. A terminal block with a replaceable fuse, characterized in that: The invention comprises an insulating shell (1), a fuse terminal (2), a clamping conduction mechanism and a fuse (3); a wiring cavity is formed in the insulating shell, and a fuse socket (11) communicating with the wiring cavity is further provided on the side wall of the insulating shell; the fuse terminal comprises a terminal body (21), a terminal welding foot (22) and a terminal conductive plate (23); the terminal body is fixedly positioned in the insulating shell, the terminal welding foot extends outside the insulating shell and can be welded to a circuit board, the terminal conductive plate of the fuse terminal is accommodated in the wiring cavity; the clamping conduction mechanism comprises a clamping end and an operating end; the clamping end of the clamping conduction mechanism is accommodated in the wiring cavity, the operating end extends outside the insulating shell, the fuse can be inserted into the fuse socket, the pin (31) of the fuse can be extended into the wiring cavity, and the operating end of the clamping conduction mechanism can drive the clamping end to clamp the conductive plate of the fuse terminal and the pin of the fuse to achieve conduction between the two.

2. The fuse-replaceable terminal block according to claim 1, wherein: The clamping conduction mechanism comprises a junction box (4) and a screw (5), the junction box is fixedly accommodated in the wiring cavity of the insulating shell, a wiring channel (42) is formed in the junction box, the terminal conductive plate of the fuse terminal is inserted into the wiring channel of the junction box, the pin of the fuse can also be inserted into the wiring channel of the junction box, and the pin of the fuse and the terminal conductive plate of the fuse terminal are in an overlapping insertion state, a threaded hole (41) is also provided on the side wall of the junction box, the screw is movably screwed into the threaded hole on the side wall of the junction box, the end of the screw can be tightly pressed against the pin of the fuse or the terminal wire plate of the wiring terminal so that the two are in close contact, and the head of the screw forms the operating end of the clamping conduction mechanism.

3. The fuse-replaceable terminal block according to claim 2, wherein: A screw socket (12) communicating with the wiring cavity is provided on the side wall of the insulating shell, and the head of the screw is accommodated in the screw socket.

4. The fuse-replaceable terminal block according to claim 2, wherein: The terminal conductive plate of the fuse terminal forms a cantilever structure, and a gap is formed between it and a side wall on the inner side of the wiring channel for inserting the fuse pin. The end of the screw is pressed against the side of the terminal conductive plate facing away from the gap, thereby reducing the gap size and clamping the fuse pin.

5. The terminal block with a detachable fuse according to claim 4, characterized in that: A guide slope (231) is provided at the end of the free end of the terminal conductive plate facing the gap.

6. The fuse-replaceable terminal block according to claim 2, wherein: The junction box is a square box, and the junction cavity in the insulating shell is a square cavity matching the square box.

7. The fuse-replaceable terminal block according to claim 2, characterized in that: The insulating housing comprises an insulating base (13) and an insulating upper cover (14), wherein the insulating base is provided with a wiring groove (131), and the bottom of the wiring groove is provided with a terminal body receiving groove for receiving the terminal body and a welding leg through-hole for extending the terminal welding leg, wherein the wiring box can be inserted into the wiring groove, and the wiring box is stopped on the opening of the terminal body receiving groove so that the terminal body is fixedly positioned in the terminal receiving groove, and the insulating upper cover can be fixedly covered on the wiring groove opening of the insulating base so that the wiring box is fixedly positioned in the wiring groove, and a through fuse socket is formed in the insulating upper cover, and the fuse socket can be communicated with the wiring groove, and the wiring groove covered by the insulating upper cover forms a wiring cavity.

8. The fuse-replaceable terminal block according to claim 7, characterized in that: The insulating upper cover is also provided with a hook of a cantilever structure, and the side wall of the wiring slot is also provided with a slot (132). When the insulating upper cover is covered on the insulating base, the hook on the insulating upper cover is locked in the slot of the wiring slot to achieve a fixed buckling connection between the insulating upper cover and the insulating base.

9. The detachable fuse terminal block according to claim 1 or 8, characterized in that: The insulating shell is also provided with a hollow structure or a transparent peep window (15), through which the state of the fuse pin after being locked in place can be observed.

10. The fuse-replaceable terminal block according to claim 1, characterized in that: The opening of the fuse socket of the insulating housing is formed with a finger-avoiding notch (111) for inserting and removing the fuse.

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