CN111613908A

CN111613908A - Connecting terminal

Info

Publication number: CN111613908A
Application number: CN201910549178.4A
Authority: CN
Inventors: 高淑玲
Original assignee: Jiangxi Gaochao Industrial Co ltd
Current assignee: Jiangxi Gaochao Industrial Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-09-01

Abstract

The invention discloses a wiring terminal which comprises an insulating shell, an unlocking piece and a clamping piece, wherein the insulating shell and the unlocking piece are connected with each other, the clamping piece is positioned in the insulating shell and used for fixing an external lead and electrically connecting with the external lead, and the unlocking piece penetrates through the insulating shell and directly presses the clamping piece to unlock the clamping piece. The invention has the advantages that: the prior art of prying the locking and unlocking piece by a lever principle is abandoned, the unlocking process is simplified into a direct pressing action, and the operation is comfortable, simple and convenient and labor-saving; the conductive area in the clamping piece is increased, and the clamping piece can adapt to plugging of 0.5-2.5 square wires; the hard wire is directly inserted and connected, and the fast insertion of the hard wire can be realized without any other redundant steps; the copper sheet of the conductive part has large area contacting with the lead, so that the temperature rise of the electric wire is lower after the electric wire is electrified, and the wiring conductive effect is better; the terminal assembly of binding post is few, simple to operate.

Description

Connecting terminal

Technical Field

The invention relates to a connecting terminal, in particular to a threadless connecting terminal.

Background

The main structure of the current threadless wiring terminal generally comprises a shell, a locking and unlocking piece and a clamping piece, wherein the locking and unlocking piece is used for opening and closing the clamping piece positioned inside the shell, so that a wire can be inserted into the clamping piece when the clamping piece is opened, and the wire is kept inside the shell of the wiring terminal when the clamping piece is closed, thereby realizing the fixation of the wire and the connection among a plurality of wires.

The locking and unlocking piece is provided with a connecting part matched with the shell, the connecting part is not only used for connecting the locking and unlocking piece with the shell, but also can play a role of a lever fulcrum when the clamping piece is opened and closed. When one end of the locking and unlocking piece is lifted, usually the end far away from the wiring socket, the other end of the locking and unlocking piece can be pressed down until contacting the clamping piece under the action of the lever, so that the opening and closing of the clamping piece are controlled. The problem that such technical scheme exists is, locking unlocking piece needs the arm of force of certain length just can exert external force to the clamping piece through leverage, and usually, application of force one end should occupy locking unlocking piece's most length as far as possible, perhaps, should guarantee during the application of force that application of force one end has great arm of force in order to produce great moment, just can make the stress end exert on the clamping piece with great strength. The structure puts high requirements on the rigidity and stability of the locking and unlocking piece and the parameters of the processing precision, firmness and the like of the connecting mechanism between the locking and unlocking piece and the shell.

Disclosure of Invention

The invention aims to solve the technical problem that a lever prying mode in the prior art is replaced by a direct pressing mode in the process of installing and disassembling a lead, and the problems of complex processing and labor-consuming operation of a wiring terminal in the prior art are solved.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the wiring terminal comprises an insulating shell, an unlocking piece and a clamping piece, wherein the insulating shell and the unlocking piece are connected with each other, the clamping piece is positioned inside the insulating shell and used for fixing an external wire and electrically connected with the external wire, and the unlocking piece penetrates through the insulating shell and directly presses the clamping piece to unlock the clamping piece.

Further, the clamping piece comprises a conductive part and a clamping part, and the conductive part is fixedly connected with the clamping part.

Further, the clamping piece comprises at least 1 conductive part and 2 clamping parts connected side by side.

Further, the clamping part comprises a fixed section, a bending section and a clamping section, and the fixed section and the clamping section are connected through the bending section to form an acute angle alpha.

Further, the clamping section is matched with the conductive part to clamp the front end of the lead.

Furthermore, a notch is arranged in the middle of the edge of the clamping section, which is in contact with the conductive part.

Further, the conductive part comprises a wiring section, a connecting section and a bottom which are connected in sequence, the wiring section and the bottom are parallel to each other, and the connecting section is vertically connected with the wiring section and the bottom respectively.

Furthermore, the insulating housing and the unlocking piece are detachably connected, the unlocking piece is provided with a movable part, the movable part can penetrate through a first through hole formed in the insulating housing and stretch into the insulating housing, and then continuously penetrates through a second through hole formed in the conductive part and contacts with the clamping piece, and the movable part can rotate or displace relative to the clamping piece under the action of external force.

Further, the movable part comprises a pressing plate and a pressing block which are integrally formed, the pressing plate is provided with a downward concave arc surface suitable for being pressed by human fingers, and the pressing block is used for pressing and driving the clamping section to be separated from the conductive part when being pressed.

Furthermore, insulating housing passes through sealed lid joint with the unlocking part.

Further, insulating housing and unblock piece direct joint.

Further, the unlocking piece has a sealing part, the insulating housing is connected with the sealing part in a clamping mode, reinforcing ribs are arranged on the inner surface of the sealing part, and grooves for the reinforcing ribs to be clamped into are formed in the insulating housing.

Furthermore, the unlocking piece is provided with a movable part, the movable part can firstly penetrate through a first through hole formed in the insulating shell and extend into the insulating shell, and then continuously penetrates through a second through hole formed in the conductive part to be in contact with the clamping piece, the movable part can rotate or displace relative to the clamping piece under the action of external force, and the movable part is detachably connected with the insulating shell.

Furthermore, the pressing blocks are a pair of pressing blocks symmetrically arranged on the lower surface of the pressing plate.

Furthermore, a test hole for detecting voltage and current is further formed in the insulating shell.

Furthermore, the outer bottom of the insulating shell is also provided with a universal pin for fixing the wiring terminal on the plane of the electrical appliance element.

Compared with the prior art, the invention has the advantages that: 1. the prior art of prying the locking and unlocking piece by a lever principle is abandoned, the unlocking process is simplified into a direct pressing action, and the operation is comfortable, simple and convenient and labor-saving; 2. the conductive area in the clamping piece is increased, and the clamping piece can adapt to plugging of 0.5-2.5 square wires; 3. the hard wire is directly inserted and connected, and the fast insertion of the hard wire can be realized without any other redundant steps; 4. the copper sheet of the conductive part increases the area of the contact wire, so that the temperature rise of the electric wire is lower after the electric wire is electrified, and the conductive effect is better; 5. the terminal assembly of binding post is few, simple to operate.

Drawings

Fig. 1 is a schematic overall structure diagram of a connection terminal according to a first embodiment of the present invention.

Fig. 2 is an exploded view of a connection terminal according to a first embodiment of the present invention.

Fig. 3 is a partial structural schematic view of a connection terminal according to a first embodiment of the present invention.

Fig. 4 is a schematic structural view of the insulating housing 100 (without the sealing cap 160) of the connection terminal according to the first embodiment of the present invention.

Fig. 5 is a schematic structural view of an unlocking member 200 of the connection terminal according to the first embodiment of the present invention.

Fig. 6 is a schematic structural view of a sealing cap 160 of a connection terminal according to a first embodiment of the present invention.

Fig. 7 is a schematic view of a clamping member 300 of the terminal according to the present invention.

Fig. 8 is a schematic structural view of the conductive portion 310 of the connection terminal of the present invention.

Fig. 9 is a schematic structural view of the clamping portion 320 of the terminal of the present invention.

Fig. 10 is a schematic view of the entire structure of a connection terminal according to a second embodiment of the present invention.

Fig. 11 is a schematic structural view of an insulating housing 100' of a connection terminal according to a second embodiment of the present invention.

Fig. 12 is a schematic structural view of an unlocking member 200' of a connection terminal according to a second embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 12, the terminal of the present invention includes an insulative housing 100 and a unlocking member 200 coupled to each other, and a clamping member 300. The insulating housing 100 has a continuous inner surface 110 inside, the inner surface 110 forms a cavity 111 communicating with the outside, the inner surface 110 has a fixing portion 120 protruding from the inner surface 110 into the cavity 111, the fixing portion 120 can fix the clamping member 300 in the cavity 111 and keep the clamping member 300 from moving, the fixing portion 120 of the insulating housing 100 can be inserted into the slot 301 to achieve quick positioning of the clamping member 300 when being installed in the insulating housing 100 and further fixing after being installed to prevent the clamping member 300 from being displaced in the insulating housing 100. The fixing portion 120 has a convex plate shape, a block shape, or a sheet shape, which is advantageous for insertion into the slit 301.

The insulating housing 100 further has a first passage 130 communicating with the cavity 111 and the clamping member 300 to allow an external wire to pass therethrough and to enable the external wire to be directly inserted into the clamping member 300. Direct insertion means that the external wire is not bent or folded while moving inside the first passage 130 until the front end of the wire is inserted into the clamping member 300 and clamped by the clamping member 300, that is, the wire is inserted into the terminal and fixed inside the terminal, requiring only one action. And when the external force is directly pulled on the wire, the front end of the wire does not depart from the clamping piece 300, unless enough external force is applied to the clamping piece 300, the clamping piece 300 can release the front end of the wire, but the wire or the front end of the wire cannot be popped out or pushed out, and the clamping state of the front end of the wire is just released, so two actions are needed if the wire is pulled out of the wiring terminal, firstly, the external force is applied to the clamping piece 300 to release the clamping state of the clamping piece 300, secondly, another external force is applied to the wire to pull out the wire.

The clamping member 300 has at least both clamping and conducting functions. The clamping function means that the front end of the wire can be clamped; the conductive function means that the leading end of the wire is brought into contact with the clamping member 300 and electrically connected to at least a part of the clamping member 300. In addition to this, the clip 300 can be stably held inside the cavity 111, and for this purpose, the clip 300 has a structure capable of being stably fitted inside the cavity 111, for example, the clip 300 has a slit 301 fitted with the protruding fixing portion 120. This structure also enables quick positioning of the clamping member 300 when assembling the terminal.

The clamping member 300 has a conductive portion 310 and a clamping portion 320, the conductive portion 310 may be made of a metal material with good conductivity or other materials, and in various embodiments of the present invention, the conductive portion 310 is made of copper. The clamping portion 320 has an elastic restoring function, and is fixedly connected to the conductive portion 310, for example, by riveting, welding, bonding or other fixing connection methods, or detachably connected to the conductive portion 310, for example, by inserting or clamping, which is not prone to relative displacement. In various embodiments of the present invention, the clip portion 320 is made of stainless steel. The clip 300 has at least 1 conductive part 310 and 2 clamping parts 320 connected side by side.

The clamping portion 320 includes a fixing section 321, a bending section 322, and a clamping section 323, the fixing section 321 and the clamping section 323 are connected by the bending section 322 and form a certain angle, in each embodiment of the present invention, the fixing section 321 and the clamping section 323 form an acute angle α, in other embodiments, if the limitation of the space size is not considered, the fixing section 321 and the clamping section 323 may also form an obtuse angle, but for the terminal requiring the volume reduction as much as possible, the forming of the acute angle α is a preferred embodiment. The bending section 322 has an arc-shaped bending form, and provides an elastic reset buffer room for the clamping section 323 besides connecting the fixing section 321 and the clamping section 323, so that the processing difficulty is reduced, and the strength of the whole clamping piece 300 is improved. In this embodiment, the clamping portion 320 is integrally formed, and after the stainless steel sheet is bent by an external force, a bent portion of the stainless steel sheet is directly formed into a bent section 322, one end of the stainless steel sheet is formed into a fixed section 321, and the other end is formed into a clamping section 323. In various embodiments of the present invention, 2 clips 320 are connected at the fixing segment 321. When the number of the clamping parts 320 is more than 2, the adjacent clamping parts 320 are connected at the adjacent fixing sections 321, and a gap 301 is formed between the adjacent bending sections 322 and the adjacent clamping sections 323; of course, the adjacent clamping portions 320 may be connected at the adjacent fixing segments 321 and bending segments 322 at the same time, and only the adjacent clamping segments 323 form a gap therebetween.

The fixing section 321 is used for connecting with the conductive part 310, and the clamping section 323 is used for clamping the front end of the wire in cooperation with the conductive part 310. In order to enable the space between the clamping section 323 and the conductive part 310 to be suitable for wires with more specifications (diameters) and protect the wires from being pinched off due to excessive clamping force, the edge of the clamping section 323 contacting with the conductive part 310 is provided with a notch 330, and in order to improve the stability of clamping the wires, the notch 330 is located in the middle of the clamping section 323. The notch 330 may be processed in various shapes as required, and the notch 330 is preferably formed in an arc shape in consideration of the shape of the cross section of the wire and the fixation.

The conductive portion 310 includes a connection segment 311, a connection segment 312, and a bottom portion 313, which are connected in sequence, and may be integrally formed by using a copper sheet. When the leading end of the wire is inserted into the notch 330 and pressed against the lower surface of the wire connection section 311 by the clamping section 323, the wire connection section 311 is electrically connected to the leading end of the wire. The connecting section 312 is used to connect the wiring section 311 and the bottom portion 313, and in various embodiments of the present invention, the connecting section 312 is provided with a plurality of through holes 314 to reduce the cost of the copper sheet and facilitate heat dissipation. The bottom portion 313 is used for connecting with the fixing segment 321 to connect the conductive portion 310 and the clamping portion 320. In various embodiments of the present invention, the fixing section 321 is provided with a hole 350 for matching and fixing connection with a bump 360 on the bottom 313; meanwhile, a gap 301 is formed between the adjacent bending sections 322 and the adjacent clamping sections 323, the bottom 313 is provided with buckling arms 315 extending out of the end of the bottom, the width of each buckling arm 315 is slightly smaller than that of the gap 301, the buckling arms 315 and the gap 301 are arranged in a one-to-one correspondence manner, the buckling arms 315 penetrate through the gap 301 and are bent to buckle the fixing sections 321, and the fixed connection between the conductive part 310 and the clamping part 320 is further realized. Of course, the conductive portion 310 and the clamping portion 320 may also adopt other connection methods, such as bonding, welding, etc., and are not described in detail.

In order to stably mount the clamping member 300 inside the insulating housing 100 and to make the structure of the clamping member 300 more compact, the terminal section 311 is parallel to the bottom portion 313 and the fixing section 321, and the connecting section 312 is perpendicularly connected to the terminal section 311 and the bottom portion 313, respectively.

The insulation housing 100 is detachably connected with the unlocking member 200, the unlocking member 200 is provided with a movable part 210 which can rotate or displace relative to the clamping member 300, and the movable part 210 can firstly penetrate through a first through hole 140 arranged on the insulation housing 100 and extend into the cavity 111, and then continuously penetrates through a second through hole 370 arranged on the conductive part 310 and contacts the clamping member 300. In various embodiments of the present invention, the short arm 340 does not contact the lower surface of the wire connection section 311, but is located below the second through hole 370 on the wire connection section 311. The movable portion 210 contacts the short arm 340 of the clamping section 323 and presses the short arm 340 when a user directly or indirectly applies an external force to the movable portion 210, so that the short arm 340 drives the clamping section 323 to move towards the lower surface far away from the wire connecting section 311, the pressure borne by the front end of the wire is relieved, and at the moment, the wire can be pulled out from the wire connecting terminal by applying a pulling force to the wire. In the same manner as described above, the clamping section 323 can be moved away from the wire connecting section 311, and a pigtail can be inserted between the clamping section 323 and the wire connecting section 311. After all the external force is removed, the elastic potential energy of the clamping section 323 accumulated due to the previous compression causes the clamping section 323 to move toward the lower surface of the wire connecting section 311 again until the flexible wire is clamped. In the case of a hard wire, the clamping section 323 can be pushed away from the wire connecting section 311 by the force of the front end of the hard wire, so that the front end of the hard wire is directly inserted between the clamping section 323 and the wire connecting section 311 without applying an external force.

Each movable portion 210 corresponds to one clamping portion 320, and further, each unlocking member 200 corresponds to one clamping portion 320, so as to realize independent locking and unlocking of each wire. In various embodiments of the present invention, the movable portion 210 includes a pressing plate 211 and a pressing block 212 which are integrally formed, and the pressing plate 211 has a downwardly concave arc surface suitable for being pressed by a human finger, so as to disperse a reaction force applied to the finger during pressing and improve operation comfort. The press piece 212 serves to press and drive the clamping section 323 away from the lower surface of the wire connection section 311, i.e., out of contact with the conductive portion 310, when pressed. The pressing block 212 is in surface contact with the clamping section 323, the contact surface of the pressing block 212 (the surface in contact with the clamping section 323) is a plane, and the non-contact surface of the pressing block 212 is transited by a smooth arc surface or a short plane, so that the abrasion between the parts is reduced. In each embodiment of the present invention, the pressing block 212 is a pair symmetrically disposed on the lower surface of the pressing plate 211, and accordingly, the first through hole 140 disposed on the insulating housing 100 and the second through hole 370 disposed on the conductive portion 310 are a pair. Compared with a single pressing block 212, the pair of pressing blocks 212 can improve the stability of operation, prevent the clamping section 323 from being incapable of being separated or completely separated from being contacted with the wiring section 311 due to uneven stress, and effectively prolong the service life of the clamping section 323 due to the fact that the stress area of the clamping section 323 is increased.

The junction 220 of the unlocking member 200 and the insulating housing 100 has a thickness smaller than that of the pressing plate 211 of the movable portion 210, i.e., the junction 220 has a groove 221 thinning the thickness of the junction 220, but does not break the junction 220 during use. When the movable portion 210 is pressed down, the movable portion 210 actually pivots at the joint 220 by a small angle, and in order to allow the movable portion 210 to pivot smoothly when an external force is applied, a space for allowing the movable portion 210 to pivot, that is, a groove 221, needs to be provided at the joint 220. In the embodiments of the present invention, the cross section of the groove 221 is triangular, but the cross section may also be trapezoidal, arc-shaped, or semicircular, as long as the opening width of the groove 221 is not less than the width of the bottom of the groove; of course, if the pressing plate 211 is long enough, the angle required for pressing down may be small enough, and the opening width of the groove 221 may be smaller than the width of the bottom of the groove, but the processing difficulty may be increased. When the external force disappears, the movable portion 210 may reversely pivot to return to the original position under the action of its elastic potential energy, or the movable portion 210 may be forced to return to the original position during the returning process of the clamping section 323. Of course, other connection means, such as a pin connection, may be used to allow the movable portion 210 to be rotationally depressed. The movable portion 210 may be detachably connected to the insulating housing 100 in other non-rotational manners, as long as the movable portion 210 can move toward the clamping section 323 and press the clamping section 323 under the action of external force while being connected to the insulating housing 100, that is, the movable portion 210 is detachably connected to the insulating housing 100. In the first embodiment of the present invention, the insulating housing 100 has the insertion hole 104 which is fittingly inserted with the resilient pin 240 of the unlocking member 200 to fix the unlocking member 200.

The insulating housing 100 is further provided with a test hole 150 for detecting voltage and current.

In various embodiments of the present invention, the clamping member 300 is loaded from the front end opening of the insulation case 100, and the wire is inserted from the rear end of the insulation case 100, i.e., the opening of the first passage 130 is located at the rear end of the insulation case 100; the insulating housing 100 has a detachable sealing cover 160, when the clamping member 300 is installed in the insulating housing 100, the sealing cover 160 is engaged with the front opening of the insulating housing 100, and the insertion hole 104 is located on the sealing cover 160 for being engaged with the pin 240 of the unlocking member 200. The sealing cover 160 is provided with a reinforcing rib 161 inside for enhancing the strength of the sealing cover 160, and can be matched with other parts of the insulating housing 100 to further abut against the clamping member 300 inside the insulating housing 100 to prevent the clamping member 300 from being displaced.

In the second embodiment of the present invention, the jack 104 'is located at the top of the insulating housing 100', the unlocking member 200 'has a sealing portion 160', the top of the insulating housing 100 'is provided with an upper clamping hole 180' to be clamped with the first clamping pin 162 'of the sealing portion 160', the top of the insulating housing 100 'is further provided with a lower clamping hole 190' to be clamped with the second clamping pin 163 'of the sealing portion 160', the inner surface of the sealing portion 160 'is provided with a rib 161' to enhance the strength of the sealing portion 160 'and to be matched with other portions of the insulating housing 100' to further abut against the clamping member 300 located inside the insulating housing 100 'to prevent the clamping member 300 from shifting, and the insulating housing 100' is provided with a groove 191 'for the rib 161' to be clamped, so that the connection between the insulating housing 100 'and the unlocking member 200' is tighter. In the second embodiment of the present invention, since the unlocking member 200 ' is directly coupled to the insulating housing 100 ' and seals the insulating housing 100 ' after the coupling, the sealing cover 160 of the first embodiment is omitted, and thus the insertion hole 104 and the elastic pin 240 of the first embodiment are not provided. The rest is the same as the first embodiment of the present invention, and is not described again.

The bottom of the housing 100 is also provided with universal pins 170 for securing the terminals to the electrical component plane.

Claims

1. Terminal comprising an insulating housing (100, 100 ') and an unlocking member (200, 200 ') connected to each other, and a clamping member (300), said clamping member (300) being located inside said insulating housing (100, 100 '), said clamping member (300) being intended to fix and be electrically connected to an external conductor, characterized in that: the unlocking member (200, 200 ') directly presses the clamping member (300) through the insulating housing (100, 100') to unlock the clamping member (300).

2. The connection terminal according to claim 1, wherein: the clamping piece (300) comprises a conductive part (310) and a clamping part (320), wherein the conductive part (310) and the clamping part (320) are fixedly connected.

3. The connection terminal according to claim 2, wherein: the clamping element (300) comprises at least 1 conducting part (310) and 2 clamping parts (320) connected side by side.

4. The connection terminal according to claim 2, wherein: the clamping part (320) comprises a fixed section (321), a bending section (322) and a clamping section (323), wherein the fixed section (321) is connected with the clamping section (323) through the bending section (322) to form an acute angle alpha.

5. The connection terminal according to claim 4, wherein: the clamping section (323) cooperates with the conductive portion (310) to clamp the leading end of the wire.

6. The connection terminal according to claim 5, wherein: and a notch (330) is arranged in the middle of the edge of the clamping section (323) which is contacted with the conductive part (310).

7. A terminal according to any one of claims 2 to 6, wherein: the conductive part (310) comprises a wiring section (311), a connecting section (312) and a bottom (313) which are connected in sequence, the wiring section (311) and the bottom (313) are parallel to each other, and the connecting section (312) is respectively and vertically connected with the wiring section (311) and the bottom (313).

8. A terminal according to any one of claims 2 to 6, wherein: the insulation shell (100, 100 ') is detachably connected with the unlocking piece (200, 200 '), the unlocking piece (200, 200 ') is provided with a movable part (210), the movable part (210) can firstly penetrate through a first through hole (140) formed in the insulation shell (100, 100 ') to extend into the insulation shell (100, 100 ') and then continuously penetrate through a second through hole (370) formed in the conductive part (310) to contact the clamping piece (300), and the movable part (210) can rotate or displace relative to the clamping piece (300) under the action of external force.

9. The connection terminal according to claim 8, wherein: the movable part (210) comprises an integrally formed pressing plate (211) and a pressing block (212), the pressing plate (211) is provided with a downward concave arc surface suitable for being pressed by human fingers, and the pressing block (212) is used for pressing and driving the clamping section (323) to be separated from the conductive part (310) when being pressed.

10. The connection terminal according to claim 8, wherein: the insulating shell (100) is clamped with the unlocking piece (200) through a sealing cover (160).

11. The connection terminal according to claim 8, wherein: the insulating shell (100 ') is directly clamped with the unlocking piece (200').

12. The connection terminal of claim 11, wherein: the unlocking piece (200 ') is provided with a sealing part (160 '), the insulating shell (100 ') is clamped with the sealing part (160 '), the inner surface of the sealing part (160 ') is provided with a reinforcing rib (161 '), and the insulating shell (100 ') is provided with a groove (191 ') for clamping the reinforcing rib (161 ').

13. A terminal according to claims 2 to 6, wherein: the unlocking piece (200, 200 ') is provided with a movable part (210), the movable part (210) can firstly penetrate through a first through hole (140) arranged on the insulating shell (100, 100 ') and extend into the insulating shell (100, 100 ') and continuously penetrate through a second through hole (370) arranged on the conductive part (310) to contact the clamping piece (300), and the movable part (210) can rotate or displace relative to the clamping piece (300) under the action of external force; the movable part (210) is detachably connected with the insulating housing (100, 100').

14. The connection terminal according to claim 9, wherein: the pressing blocks (212) are a pair of pressing blocks symmetrically arranged on the lower surface of the pressing plate (211).

15. The connection terminal according to claim 1, wherein: the insulating shell (100, 100') is also provided with a test hole (150) for detecting voltage and current.

16. The connection terminal according to claim 1, wherein: the outer bottom of the insulating shell (100, 100') is also provided with a universal pin (170) for fixing the wiring terminal on the plane of the electrical element.