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 formed in the side wall of the insulating shell, a 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, and the terminal welding foot is fixedly positioned in the terminal body. 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 to realize conduction of the conductive plate and the pin of the fuse, 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 invention relates to a connector, in particular to a terminal block with a detachable fuse. Background Art

[0002] The fuse terminal and the fuse pin on the existing terminal block are fixed together. After the two are fixedly assembled together, they are fixedly encapsulated in the insulating shell of the terminal block. The fuse of this terminal block cannot be removed from the terminal block. Once the fuse is burned or damaged, the entire terminal block needs to be replaced, resulting in high cost of using this terminal block and a lot of waste of parts. When the existing terminal block is in use, since the fuse is completely enclosed in the insulating shell, it is impossible to observe the fuse, and the connection between the fuse pin and the fuse terminal cannot be known, let alone adjusted. Once the connection between the fuse pin and the fuse terminal is loose, the entire terminal block will be scrapped. Summary of the invention

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

[0004] The technical solution adopted by the present invention to solve its technical problems is: a terminal block with a detachable fuse, comprising an insulating shell, a fuse terminal, a clamping conduction mechanism and a fuse, wherein a wiring cavity is formed in the insulating shell, and a fuse socket connected to the wiring cavity is also provided on the 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 on 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 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 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.

[0005] As a further improvement of the present invention, the clamping conduction 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 access of the junction box, the pin of the fuse can also be inserted into the wiring access 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, and a threaded hole is also provided on the side wall of the junction box, and 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 to make the two in close contact, and the head of the screw forms the operating end of the clamping conduction mechanism.

[0006] As a further improvement of the present invention, a screw socket connected to 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 tightly against the side of the terminal conductive plate facing away from the gap to reduce the gap size and clamp the fuse pin.

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

[0009] As a further improvement of the present invention, the junction box is a square box, and the wiring 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 extending the terminal welding foot, 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 through 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 also provided with a hook of a cantilever structure, and the side wall of the wiring slot is also 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 achieve 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, the opening of the fuse socket of the insulating housing is formed with a finger-avoiding notch for inserting and removing the fuse.

[0014] The beneficial technical effect of the present invention is as follows: 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 fuse is burned out or blown out during use of the terminal block, the fuse inside the terminal block can be quickly replaced on site without disassembling and replacing the entire terminal block, thereby saving the use cost for the end customers and improving the efficiency of on-site maintenance. The pin of the fuse of the present invention and the terminal conductive plate of the fuse terminal have a small contact area, so that the loop impedance value of the entire fuse is smaller and more stable, and it is easier to realize 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 out by the heat energy transmitted from the high temperature. The structure of the present invention protects the fuse from being burned 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 a front view of a terminal block in the prior art;

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

[0017] Figure 3 It is a three-dimensional exploded view of the present invention;

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

[0019] Figure 5 A perspective view of the present invention;

[0020] Figure 6 It is a front view of the present invention;

[0021] Figure 7 It is a right side view of the present invention;

[0022] Figure 8 A top view of the present invention;

[0023] Fig. 9 A three-dimensional diagram of the detachable assembly structure of the fuse terminal and the fuse of the present invention;

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

[0025] Fig.11 It is a front view of the detachable assembly structure of the fuse terminal and the fuse of the present invention;

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

[0027] Embodiment: A terminal block with a removable fuse comprises an insulating shell 1, a fuse terminal 2, a clamping conduction mechanism and a fuse 3, wherein a wiring cavity is formed in the insulating shell 1, and a fuse socket 11 connected to the wiring cavity is also provided on the side wall of the insulating shell 1, the fuse terminal 2 comprises 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 insulating shell 1 and can be welded on a circuit board, the terminal conductive plate 23 of the fuse terminal 2 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 insulating shell 1, the fuse 3 can be inserted into the fuse socket 11, the pin 31 of the fuse 3 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 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 through the clamping conduction mechanism to transmit 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 itself 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, it can be replaced to avoid disassembling the entire terminal block, reduce maintenance costs, and improve maintenance efficiency. The above-mentioned connection structure between the fuse 3 and the fuse terminal 2 can make the impedance value of the entire loop where the fuse 3 is located smaller, the signal transmission is more stable, and it is easier to achieve the sensitivity of signal transmission, ensuring that the fuse 3 is easier to achieve its function in the environment; and because 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 during the welding of the terminal block is not easily transmitted to the fuse 3, thereby avoiding the fuse 3 from being burned due to the heat energy generated by the welding of the terminal block. This structure protects the fuse 3 from being burned 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 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 to make the two in close contact. The head of the screw 5 forms the operating end of the clamping conduction mechanism. By rotating the screw 5, the head of the screw 5 and the inner wall of the junction box 4 can clamp or loosen 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 conduction mechanism can also adopt a spring sheet, and the spring sheet and the terminal conductive plate 23 are elastically clamped or loosened The pin 31 of the fuse 3, the operating end of the clamping conduction mechanism can be a push-pull rod that drives the elastic deformation of the spring sheet, and the clamping conduction 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 to force the inner diameter of the conical inner sleeve to change to clamp or loosen the terminal conductive plate 23 and the pin 31 of the fuse 3 therein. This type is an equivalent replacement structure that can be easily thought of by technicians in this field according to the technical solution of this patent, and belongs to the protection scope of this patent.

[0030] The side wall of the insulating housing 1 is provided with a screw socket 12 connected to the wiring cavity, and 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 rotating due to accidental contact when the terminal block is used, causing the terminal conductive plate 23 and the pin 31 of the fuse 3 to loosen.

[0031] The terminal conductive plate 23 of the fuse terminal 2 forms a cantilever structure, and a gap is formed between the terminal conductive plate 23 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 is pressed against the side of the terminal conductive plate 23 facing away from the gap, thereby reducing the gap size and clamping the pin 31 of the fuse 3. The terminal conductive plate 23 adopts a cantilever structure that can swing elastically. When it is not subjected to external force, it is attached to the other side wall surface inside the wiring channel 42 of the junction box 4, and the gap between it and the side wall inside the wiring channel 42 is kept at the maximum, so that the pin 31 of the fuse 3 is smoothly inserted. After the screw 5 is rotated, the end of the screw 5 presses against the terminal conductive plate 23 to elastically deform and clamp the pin 31 of the fuse 3, ensuring that the two are in close contact. This structure is conducive to the rapid installation and removal of the fuse 3. In addition, the terminal conductive plate 23 can also be fixed in the wiring channel 42, and the screw 5 presses against the pin 31 of the fuse 3 to achieve contact and conduction between the two. This is an equivalent replacement structure that can be easily thought of by those skilled in the art based on the technical solution of this patent, and belongs to the protection scope of this patent.

[0032] The free end of the terminal conductive plate 23 is provided with a guiding inclined surface 231 facing the gap. The guiding inclined surface 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 in the insulating housing 1 is a square cavity that matches the square box. The square box and the square cavity can prevent the junction box 4 from rotating in 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 be other shapes, and the designer can design it according to the actual situation.

[0034] The insulating housing 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 wiring box 4 can be inserted into the wiring groove 131, and the wiring 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 wiring 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 connected to the wiring groove 131, and the wiring groove 131 covered by the insulating upper cover 14 forms a wiring cavity.

[0035] The insulating housing 1 adopts a split structure. When assembling, first install the fuse terminal 2 in the wiring slot 131 so that it enters the terminal accommodating slot, and then install the square box. The square box is pressed on the terminal body 21 of the fuse terminal 2. The terminal conductive plate 23 of the fuse terminal 2 is inserted into the square box, and then the screw 5 is installed. Next, the insulating upper cover 14 is pressed in, and 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 rotating 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 covers 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 buckling connection between the insulating upper cover 14 and the insulating base 13.

[0037] The insulating housing 1 is also 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 , so as to facilitate 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), wherein a wiring cavity is formed in the insulating shell, and a fuse socket (11) connected to the wiring cavity is also provided on the side wall of the insulating shell, wherein the fuse terminal comprises a terminal body (21), a terminal welding foot (22) and a terminal conductive plate (23), wherein the terminal body is fixedly positioned in the insulating shell, the terminal welding foot extends out of the insulating shell and can be welded on 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 out of the insulating shell, the fuse can be inserted into the fuse socket, the pin (31) of the fuse can extend 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, characterized in that: The clamping conduction mechanism comprises a junction box (4) and a screw (5), wherein the junction box is fixedly accommodated in a wiring cavity of an insulating housing, a wiring channel (42) 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 (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 junction 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, characterized in that: 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, characterized in that: 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 to reduce the gap size and clamp the fuse pin.

5. The fuse-replaceable terminal block according to claim 4 is 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, characterized in that: 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), the insulating base being provided with a wiring groove (131), the bottom of the wiring groove being provided with a terminal body receiving groove for receiving the terminal body and a welding leg through-hole for extending the terminal welding leg, the wiring box being insertable in the wiring groove, and the wiring box being stopped on the opening of the terminal body receiving groove so that the terminal body is fixedly positioned in the terminal receiving groove, the insulating upper cover being fixedly covered on the wiring groove opening of the insulating base so that the wiring box is fixedly positioned in the wiring groove, a through fuse socket being formed in the insulating upper cover, the fuse socket being able to communicate with the wiring groove, and the wiring groove covered by the insulating upper cover forming 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 fuse-replaceable 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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