CN215418696U

CN215418696U - Power supply connecting device

Info

Publication number: CN215418696U
Application number: CN202122098182.9U
Authority: CN
Inventors: 朱忠庚; 朱瑞洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-01-04
Anticipated expiration: 2031-09-01

Abstract

The application relates to a power supply connecting device, which comprises a plug capable of being inserted into a plug board, wherein the plug board comprises a plug board shell, jacks are formed in the plug board shell, and a plurality of groups of contact mounting positions are axially and symmetrically arranged in the jacks; each group of contact mounting positions comprises a plurality of contact mounting grooves, each contact mounting groove is internally provided with an elastic plugboard contact, the plugboard contacts in each group of contact mounting positions are respectively connected with different plugboard lead circuits, and different plugboard leads are led out from the closed part of the plugboard shell; the plug comprises an insertion part capable of being inserted into the jack and a handheld part connected with the insertion part, a plurality of groups of plug contacts which are in one-to-one correspondence with the plug board contacts are arranged on the insertion part, each group of plug contacts are respectively connected with different plug lead circuits, and different plug leads are led out from the rear end of the handheld part. This application can cut off the power supply through rotatory socket when not using, reduces because of the wearing and tearing that plug leads to repeatedly, increases the life of picture peg and plug.

Description

Power supply connecting device

Technical Field

The application relates to the technical field of electric appliances, in particular to a power supply connecting device.

Background

The power supply connecting device is a necessary article for each family, and parents of the families with children can worry about touching the electrified devices or the electrified connecting devices when the children play; meanwhile, when the plugboard and the plug are connected, the plug needs to be repeatedly plugged and pulled, so that the wall of the plug-in strip in the plugboard is easily abraded, the plugboard and the plug are connected and are in loose contact, the plugboard and the plug are easy to fall off, the service life of the connecting device is shortened, and potential safety hazards exist.

The existing plugging mode of the common socket and the plug does not have the waterproof function. The socket and plug matching structure with the waterproof function needs to waterproof seal the joint of the outer wall of the socket after the plug is inserted into the socket, and under the state, the plug and the socket are always in a conductive state. When power is needed to be cut off, the plug can only be pulled out of the socket, and the waterproof sealing effect can be damaged; repeatedly pull out and insert, long-time back of using, sealed effect reduces, in case inside water gets into the picture peg, if not in time cut off the power supply and cause the circuit short circuit easily, and then damage electrical equipment and cause loss of property.

Disclosure of Invention

The utility model provides a purpose provides a power connecting device can not extract the plug when not using, reduces because of the wearing and tearing that lead to after the plug relapses the plug, increases the life of picture peg and plug, still can effectively prevent simultaneously that the plug from droing to compromise waterproof function, solved the not good problem of picture peg security in the past.

The application is realized as follows: a power supply connecting device comprises a plug capable of being inserted into a plug board, wherein the plug board comprises a plug board shell, jacks are formed in the plug board shell, and a plurality of groups of contact mounting positions are axially and symmetrically arranged in the jacks; each group of contact mounting positions comprises a plurality of contact mounting grooves, each contact mounting groove is internally provided with an elastic plugboard contact, the plugboard contacts in each group of contact mounting positions are respectively connected with different plugboard lead circuits, and different plugboard leads are led out from the closed part of the plugboard shell and are connected with indoor power supply circuit circuits; the plug comprises an insertion part capable of being inserted into the jack and a handheld part connected with the insertion part, a plurality of groups of plug contacts which are in one-to-one correspondence with the plug board contacts are arranged on the insertion part, each group of plug contacts are respectively connected with different plug lead circuits, and different plug leads are led out from the rear end of the handheld part.

The flashboard contact divide into two sets or three groups, and two sets or three groups of flashboard contacts are axisymmetric distribution with the axis of jack, and every group flashboard contact is respectively along jack inner wall axial distribution, and the corresponding division of plug contact is two sets or three groups, and two sets or three groups of plug contacts are axisymmetric distribution with the axis of insertion part, and every group plug contact is respectively along insertion part outer wall axial distribution, plug contact position and flashboard contact position one-to-one.

A cylindrical inserting core is fixedly arranged in the inserting hole, an inserting hole is formed between the inserting core and the inner wall of the inserting hole, and a plurality of groups of contact mounting positions are axially and symmetrically distributed on the inner wall of the inserting hole or the outer wall of the inserting core; each group of contact mounting positions comprises a plurality of contact mounting grooves, each contact mounting groove is internally provided with an elastic plugboard contact, the plugboard contacts in each group of contact mounting positions are respectively connected with different plugboard lead circuits, and different plugboard leads are led out from the closed part of the plugboard shell; the plug is including the portion of inserting that can insert the socket, the handheld portion that links to each other with the portion of inserting, the portion of inserting is the open cavity body of lower extreme, is provided with a plurality of groups plug contacts with aforementioned each group plugboard contact one-to-one on the portion of inserting outer wall or inner wall, and every group plug contact links to each other with different plug wire circuit respectively, and different plug wires are drawn forth by handheld portion rear end.

The outer wall of the insertion part is convexly provided with a limiting block, and a limiting groove is arranged in the insertion hole in a matched manner; the limiting block is divided into a power-on limiting block and a power-off limiting block, and when the power-on limiting block enters the limiting groove, the plug board contact is in contact with the plug contact; when the power-off limiting block enters the limiting groove, the plug board contact is separated from the plug contact.

The contact mounting groove is a cavity with a large inside and a small outside, the outer end of the contact mounting groove is open, the spherical plugboard contact is arranged in the contact mounting groove, the inner side of the plugboard contact is connected with a spring, and the spring is fixedly connected to the inner wall of the contact mounting groove.

The circumference of the lower part of the insertion part is provided with a clamping groove, and the bottom of the jack is provided with a clamping bulge corresponding to the clamping groove.

One or two or three main channels are arranged in the plug board shell, a plurality of branch channels are arranged on each main channel in parallel, and each branch channel is communicated with the contact mounting groove in a one-to-one correspondence manner; the plug board conducting wires are divided into main conducting wires and branch conducting wires, the main conducting wires are arranged in the main channel, each branch conducting wire is arranged in each branch channel, each branch conducting wire is connected with the plug board contacts in the contact mounting grooves in a one-to-one correspondence mode, and the plug board contacts are connected to the main conducting wires in parallel through the branch conducting wires.

One or two or three plug main channels are arranged in the inserting part, a plurality of branch channels are arranged on each plug main channel in parallel, a plug branch lead is arranged in each branch channel, the plug branch leads are correspondingly connected with the plug contacts one by one, and the plug contacts are connected on the plug main lead in parallel through the plug branch leads; the plug lead is divided into a plug main lead and a plug branch lead, and the plug main lead is arranged in the plug main channel.

The upper part of the insertion part is provided with a sealing ring.

The plug is arranged on the jack.

The utility model has the beneficial effects that: the plug can not be pulled out when the plug is not used, the abrasion caused by repeated plugging and unplugging of the plug board and the plug is reduced, the service life of the plug board and the plug is prolonged, the waterproof effect is achieved by arranging the plug on the jack, meanwhile, the water can be effectively prevented, the property loss caused by damage to electrical equipment due to circuit short circuit is avoided, the plug is not easy to fall off after being inserted into the plug board, and the safety performance is improved.

Drawings

The specific structure of the application is given by the following figures and examples:

FIG. 1 is a schematic structural view of a plug and a socket of the present application when they are not fully connected;

FIG. 2 is a cross-sectional view of an embodiment of the present application;

FIG. 3 is a schematic diagram of a plug structure according to an embodiment of the present application;

FIG. 4 is a schematic view of a plugging structure of a plug board according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a second plug and a second plug board of the embodiment of the present application when the two plugs and the two plug boards are not completely connected;

FIG. 6 is a cross-sectional view of the second embodiment of the present application;

FIG. 7 is a cross-sectional view of a second plug according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a second insert plate plugging structure according to an embodiment of the present application;

legend: 1. the plug board comprises a plug board body, 2, a plug, 3, a plug board shell, 4, jacks, 5, plug board contacts, 6, plug board leads, 7, an inserting portion, 8, a handheld portion, 9, plug contacts, 10, limiting blocks, 11, limiting grooves, 12, an electrifying limiting block, 13, an outage limiting block, 14, a contact mounting groove, 15, a spring, 16, a clamping groove, 17, a clamping protrusion, 18, a main lead, 19, branch leads, 20, a channel, 21, a sealing ring, 22, a plugging plug, 23, an elastic rope, 24, an indicating lamp, 25 and a plug core.

Detailed Description

The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.

The first embodiment is as follows: as shown in fig. 1 to 4, a power connection device includes a plug 2 insertable into a socket 1; the plug board 1 comprises a plug board shell 3, a jack 4 is formed in the plug board shell 3, and a plurality of groups of contact mounting positions are symmetrically arranged in the jack 4 along the axial direction; each group of contact mounting positions comprises a plurality of contact mounting grooves 14, each contact mounting groove 14 is internally provided with an elastic plugboard contact 5, the plugboard contacts 5 in each group of contact mounting positions are respectively connected with different plugboard lead wires 6 in a circuit mode, different plugboard lead wires 6 are led out from the closed part of the plugboard shell 3 and are connected with an indoor power supply circuit in a circuit mode, and the closed part can be the side wall or the bottom surface of the plugboard shell 3; the plug 2 comprises an inserting part 7 which can be inserted into the jack 4 and a handheld part 8 connected with the inserting part, a plurality of groups of plug contacts 9 which are in one-to-one correspondence with the plug board contacts 5 are arranged on the inserting part 7, each group of plug contacts 9 are respectively connected with different plug lead circuits, and different plug leads are led out from the rear end of the handheld part 8 and are connected with a power supply circuit of an electric appliance. The plurality of groups of contact mounting positions and the plurality of groups of plug contacts 9 are two groups or three groups and respectively correspond to two connecting wires (live wire and zero wire) and three connecting wires (live wire, zero wire and ground wire).

As shown in fig. 1 to 4, the socket contacts 5 are divided into three groups, the three groups of socket contacts 5 are axisymmetrically distributed along the axis of the socket 4, each group of socket contacts 5 is axially distributed along the inner wall of the socket 4, the plug contacts 9 are also divided into three groups, the three groups of plug contacts 9 are axisymmetrically distributed along the axis of the insertion portion 7, each group of plug contacts 9 is axially distributed along the outer wall of the insertion portion 7, and the positions of the plug contacts 9 correspond to the positions of the socket contacts 5 one to one. When the plug 2 is inserted into the plugboard 1, the plugboard contact 5 can contact with the plug contact 9 by rotating the plug 2, so that the plug circuit board and the plugboard circuit board are electrically conducted. And the flashboard contact 5 and the plug contact 9 are both electric conductors.

As shown in fig. 1 to 4, the socket contacts 5 are divided into three groups, which are respectively connected to the live wire, the ground wire and the zero line of the power supply, and for distinguishing each group of socket contacts 5, to prevent the potential safety hazard caused by wrong wire connection, the upper surface positions of the sockets corresponding to the three groups of socket contacts 5 can be respectively coated with three identification lines of brown, basket and yellow-green to identify that the group of contacts are respectively connected to the live wire, the zero line and the ground wire of the power supply, and simultaneously, the outer surface of the insertion part 7 corresponding to the socket contact 9 is coated with three identification lines of brown, basket and yellow-green. When the plug-in device is used, the plug-in position can be determined by observing the colors of the lines on the outer surface of the plug-in part 7 and the surface of the plug board 1, so that the plug board contact 5 corresponding to the zero line of the plug board is close to the plug contact 9 corresponding to the zero line of the plug board.

As shown in fig. 2 and 4, the outer wall of the insertion portion 7 is convexly provided with a limiting block 10, the insertion hole 4 is internally provided with a limiting groove 11 in a matching manner, when the plug 2 is inserted into the insertion plate insertion hole 4, the limiting block 10 enters the limiting groove 11 in the insertion hole by rotating the plug 2, so that the insertion portion 7 can be prevented from rotating, and the stability of the state of the plug can be maintained; stopper 10 divide into circular telegram stopper 12 and outage stopper 13, rotary plug 2, picture peg contact 5 and plug contact 9 contact plug circular telegram when circular telegram stopper 12 gets into the inside spacing groove 11 of jack, reverse rotation plug 2 when needing the outage, circular telegram stopper 12 leaves spacing groove 11 under the exogenic action, picture peg contact 5 and plug contact 9 separating circuit disconnection when outage stopper 13 gets into the inside spacing groove 11 of jack, so only need rotary plug 2 not need plug 2 just can realize switching on and breaking off of circuit, reducible because plug 2 leads to the interior inserted sheet wall wearing and tearing of picture peg 1 repeatedly, and lead to picture peg 1 and plug 2 to be connected not hard up, bad contact and drop.

The rotation travel of the inserting part 7 from the electrifying limiting block 12 to the power-off limiting block 13 to the limiting groove 11 is less than the pitch of the arcs of the two groups of inserting plate contacts 5 on the inner wall of the inserting hole 4.

The limiting block 10 is a spherical crown-shaped protrusion, and the limiting groove 11 is a spherical crown-shaped recess matched with the limiting block 10.

As shown in fig. 1, 3 and 4, the contact mounting groove 14 is a cavity with a large inside and a small outside, the outer end of the cavity is open, the spherical inserting plate contact 5 is arranged in the contact mounting groove 14, the inner diameter of the outer end opening is smaller than the diameter of the inserting plate contact 5, and the inserting plate contact 5 is exposed out of the small half part of the contact mounting groove 14 at most; and the inner side of the inserting plate contact 5 is connected with a spring 15, and the spring 15 is fixedly connected to the inner wall of the contact mounting groove 14. When the plug 2 is connected with the plugboard 1, the plug contact 9 is contacted with the plugboard contact 5, the plug contact 9 extrudes the plugboard contact 5, the plugboard contact 5 retreats into the contact mounting groove 14 and still keeps contact with the plug contact 9, and at the moment, the spring 15 elastically deforms, so that the elastic plugboard contact 5 is formed, the rigid collision between the two contacts is avoided, and the abrasion of the contacts is reduced.

As shown in fig. 1, 3 and 4, the lower circumference of the ring insertion portion 7 is provided with a clamping groove 16, the bottom of the insertion hole 4 is provided with a clamping protrusion 17 corresponding to the clamping groove 16, the end of the clamping protrusion 17 is an arc-shaped portion, and the cross section is a semi-cylinder. When the connection between the plug board 1 and the plug 2 is completed, the engaging groove 16 at the lower part of the inserting part 7 is embedded with the engaging protrusion 17 arranged at the bottom of the inserting hole 4, so that the connection firmness between the plug board 1 and the plug 2 can be improved, the plug board 1 is prevented from being separated from the plug 2, and the axial falling between the plug board 1 and the plug 2 is prevented. When the plug 2 rotates, the clamping protrusion 17 can also rotate in the clamping groove 16, so that the plug board 1 and the plug 2 are prevented from being separated.

As shown in fig. 1 and 4, one or two or three main channels 20 are formed in the board housing 3, each main channel 20 is provided with a plurality of branch channels in parallel, and each branch channel is communicated with the contact mounting groove 14 in a one-to-one correspondence manner; the plugboard conducting wires 6 are divided into main conducting wires 18 and branch conducting wires 19, the main conducting wires 18 are arranged in main channels 20, each branch conducting wire 19 is arranged in each branch channel, each branch conducting wire 19 is correspondingly connected with the plugboard contacts 5 in the contact mounting grooves 14 one by one, and a plurality of plugboard contacts 5 are connected on the main conducting wires 18 in parallel through a plurality of branch conducting wires 19.

When the main channel 20 is one, two (live wire, zero wire) or three plug wire 6 (live wire, zero wire, ground wire) are distributed in the main channel 20, and an insulating layer is required to be arranged between the plug wires 6 to prevent short circuit.

When the number of the main channels 20 is two, a plug board wire 6, namely a zero line and a live line, is distributed in each main channel 20, and the plug board wires 6 are isolated and cannot be short-circuited.

When the number of the main channels 20 is three, a plug board wire 6, namely a zero line, a live line and a ground wire, is distributed in each main channel 20, and the plug board wires 6 are isolated and cannot be short-circuited.

Similarly, one or two or three plug main channels are arranged in the insertion portion 7, a plurality of branch channels are arranged in parallel on each plug main channel, a plug branch lead is arranged in each branch channel, the plug branch leads are correspondingly connected with the plug contacts 9 one by one, and the plug contacts 9 are connected in parallel on the plug main leads through the plug branch leads. The plug lead is divided into a plug main lead and a plug branch lead, and the plug main lead is arranged in the plug main channel.

When the plug main channel is one, two (live wire and zero wire) or three (live wire, zero wire and ground wire) plug leads are distributed in the plug main channel, and an insulating layer is required to be arranged between the plug leads to prevent short circuit.

When the number of the plug main channels is two, a plug lead is arranged in each plug main channel and is respectively a zero line and a live line, and the plug leads are isolated and cannot be short-circuited.

When the number of the plug main channels is three, a plug lead is distributed in each plug main channel and is respectively a zero line, a live line and a ground wire, and the plug leads are isolated and cannot be short-circuited.

As shown in fig. 1 to 4, the surface of the plug board 1 and the plug hand-held portion 8 are both wrapped with an insulating layer.

As shown in fig. 1-4, the upper portion of the insertion portion 7 is provided with a sealing ring 21, after the plug 2 is inserted into the plug board 1, the sealing ring 21 is clamped between the plug insertion portion 7 and the insertion hole 4, the sealing surface of the sealing ring 21 is attached to the outer wall of the insertion hole 4, the sealing ring 21 is compressed to generate elastic deformation after the attachment, and the attachment of the sealing ring 21 and the insertion hole 4 is tighter after the elastic deformation, so that the sealing effect is achieved, and moisture can be effectively prevented from entering between the insertion portion 7 and the insertion hole 4.

As shown in fig. 4, a plug 22 is arranged on the jack 4, the plug 22 is fixed on the plug board 1 through an elastic rope 23, and when the plug is used, the plug 2 is inserted into the jack 4 after the plug is pulled out. When the jack 4 is not used, the plug 2 is pulled out, and the plug 22 is plugged into the jack 4, so that water is prevented from splashing or foreign matters enter the jack 4, water, dust and foreign matters can be effectively prevented, the property loss caused by damage to electrical equipment due to circuit short circuit is avoided, meanwhile, fingers of a child are prevented from being placed into the jack 4 when the child touches the device curiously, and the plug 22 in the jack 4 is pulled out when the device is used; the plug 22 is fixed on the flashboard 1 through an elastic rope 23, and the plug 22 can be prevented from being lost.

As shown in fig. 1 and 3, by providing the operating state indicator lamp 24 on the plug hand-held portion 8, the indicator lamp 24 is connected to the plug main conductor circuit. The plug is used for displaying the working state of the plug 2, when the plug 2 is normally powered on, the indicator lamp 24 is turned on, and when the plug is powered off, the indicator lamp 24 is turned off.

Example two: as shown in fig. 5 to 8, a power connection device includes a plug board 1 and a plug 2; the plug board 1 comprises a plug board shell 3, a jack 4 is formed in the plug board shell 3, a cylindrical plug core 25 is fixedly arranged in the jack 4, a socket is formed between the plug core 25 and the inner wall of the jack 4, and a plurality of groups of contact mounting positions are axially and symmetrically distributed on the inner wall of the jack 4 or the outer wall of the plug core 25; each group of contact mounting positions comprises a plurality of contact mounting grooves 14, each contact mounting groove 14 is internally provided with an elastic plugboard contact 5, the plugboard contacts 5 in each group of contact mounting positions are respectively connected with different plugboard lead wires 6 in a circuit, different plugboard lead wires 6 are led out from the closed part of the plugboard shell 3 and are connected with an indoor power supply circuit, and the closed part can be the side wall or the bottom surface of the plugboard shell 3; plug 2 is including the portion of inserting 7 that can insert the socket, the handheld portion 8 that links to each other with the portion of inserting, the portion of inserting 7 is the open cavity body of lower extreme, is provided with a plurality of groups plug contact 9 with aforementioned each group 5 one-to-one of plugboard contacts on the portion of inserting 7 outer wall or inner wall, and every group plug contact 9 links to each other with different plug wire circuits respectively, and different plug wires are drawn forth by handheld 8 rear ends of portion, link to each other with the power supply line circuit of electrical apparatus. The plurality of groups of contact mounting positions and the plurality of groups of plug contacts 9 are two groups or three groups and respectively correspond to two connecting wires (live wire and zero wire) and three connecting wires (live wire, zero wire and ground wire). The rest is the same as in example 1.

The socket has a simple structure, can avoid the electric leakage of the socket, can cut off the power by rotating the socket to separate the plug board contact from the plug contact, is convenient to operate, can reduce the abrasion caused by repeated plugging and unplugging of the plug, and prolongs the service life of the plug board and the plug; meanwhile, the plug can be effectively prevented from falling off, and the problem of poor safety of the conventional plug board is solved; the single-hole design is adopted, the required plug is smaller than the traditional plug, and the plug board with the same volume can be connected with more plugs; set up on the jack and seal the jam and can effectively be waterproof, avoid the circuit short circuit to damage electrical equipment and cause loss of property, also can prevent that the foreign matter from getting into and blocking the jack, during the use extract the jack in seal the jam can, easy operation.

The above description is intended to illustrate the present application and not to limit the scope of the present application, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present application should fall within the protection scope of the present application.

Claims

1. The utility model provides a power connecting device, is including the plug that can insert the picture peg, the picture peg includes the picture peg casing the jack has been seted up in the picture peg casing, its characterized in that: a plurality of groups of contact mounting positions are symmetrically arranged in the jack along the axial direction; each group of contact mounting positions comprises a plurality of contact mounting grooves, each contact mounting groove is internally provided with an elastic plugboard contact, the plugboard contacts in each group of contact mounting positions are respectively connected with different plugboard lead circuits, and different plugboard leads are led out from the closed part of the plugboard shell and are connected with indoor power supply circuit circuits; the plug comprises an insertion part capable of being inserted into the jack and a handheld part connected with the insertion part, a plurality of groups of plug contacts which are in one-to-one correspondence with the plug board contacts are arranged on the insertion part, each group of plug contacts are respectively connected with different plug lead circuits, and different plug leads are led out from the rear end of the handheld part.

2. A power connection device according to claim 1, wherein: the flashboard contact divide into two sets or three groups, and two sets or three groups of flashboard contacts are axisymmetric distribution with the axis of jack, and every group flashboard contact is respectively along jack inner wall axial distribution, and the corresponding division of plug contact is two sets or three groups, and two sets or three groups of plug contacts are axisymmetric distribution with the axis of insertion part, and every group plug contact is respectively along insertion part outer wall axial distribution, plug contact position and flashboard contact position one-to-one.

3. A power connection device according to claim 1, wherein: a cylindrical inserting core is fixedly arranged in the inserting hole, an inserting hole is formed between the inserting core and the inner wall of the inserting hole, and a plurality of groups of contact mounting positions are axially and symmetrically distributed on the inner wall of the inserting hole or the outer wall of the inserting core; each group of contact mounting positions comprises a plurality of contact mounting grooves, each contact mounting groove is internally provided with an elastic plugboard contact, the plugboard contacts in each group of contact mounting positions are respectively connected with different plugboard lead circuits, and different plugboard leads are led out from the closed part of the plugboard shell; the plug is including the portion of inserting that can insert the socket, the handheld portion that links to each other with the portion of inserting, the portion of inserting is the open cavity body of lower extreme, is provided with a plurality of groups plug contacts with aforementioned each group plugboard contact one-to-one on the portion of inserting outer wall or inner wall, and every group plug contact links to each other with different plug wire circuit respectively, and different plug wires are drawn forth by handheld portion rear end.

4. A power connection device as claimed in claim 1, 2 or 3, wherein: the outer wall of the insertion part is convexly provided with a limiting block, and a limiting groove is arranged in the insertion hole in a matched manner; the limiting block is divided into a power-on limiting block and a power-off limiting block, and when the power-on limiting block enters the limiting groove, the plug board contact is in contact with the plug contact; when the power-off limiting block enters the limiting groove, the plug board contact is separated from the plug contact.

5. A power connection device as claimed in claim 1, 2 or 3, wherein: the contact mounting groove is a cavity with a large inside and a small outside, the outer end of the contact mounting groove is open, the spherical plugboard contact is arranged in the contact mounting groove, the inner side of the plugboard contact is connected with a spring, and the spring is fixedly connected to the inner wall of the contact mounting groove.

6. A power connection device according to claim 4, wherein: the circumference of the lower part of the ring insertion part is provided with a clamping groove, and the bottom of the jack is provided with a clamping bulge corresponding to the clamping groove.

7. A power connection device according to claim 1 or 2 or 3 or 6, wherein: one or two or three main channels are arranged in the plug board shell, a plurality of branch channels are arranged on each main channel in parallel, and each branch channel is communicated with the contact mounting groove in a one-to-one correspondence manner; the plug board conducting wires are divided into main conducting wires and branch conducting wires, the main conducting wires are arranged in the main channel, each branch conducting wire is arranged in each branch channel, each branch conducting wire is connected with the plug board contacts in the contact mounting grooves in a one-to-one correspondence mode, and the plug board contacts are connected to the main conducting wires in parallel through the branch conducting wires.

8. A power connection device according to claim 7, wherein: one or two or three plug main channels are arranged in the inserting part, a plurality of branch channels are arranged on each plug main channel in parallel, a plug branch lead is arranged in each branch channel, the plug branch leads are correspondingly connected with the plug contacts one by one, and the plug contacts are connected on the plug main lead in parallel through the plug branch leads; the plug lead is divided into a plug main lead and a plug branch lead, and the plug main lead is arranged in the plug main channel.

9. A power connection device as claimed in claim 1 or 2 or 3 or 6 or 8, wherein: the upper part of the insertion part is provided with a sealing ring.

10. A power connection device as claimed in claim 1 or 2 or 3 or 6 or 8, wherein: the plug is arranged on the jack.