CN213401718U

CN213401718U - Electric connector combination with self-locking function

Info

Publication number: CN213401718U
Application number: CN202022559554.9U
Authority: CN
Inventors: 李坤; 贺海涛
Original assignee: Wuxi Mutual Electronic Technology Co ltd
Current assignee: Wuxi Mutual Electronic Technology Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-06-08
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses an electric connector combination with self-locking function, include: the first connector comprises a first insulating shell, a terminal, a first positioning piece, a rotary sleeve and an elastic piece, wherein the first positioning piece comprises a first connecting end and a plug end which are opposite, the first connecting end is arranged in the first insulating shell, and the plug end extends along a first direction; the terminal penetrates through the first positioning piece along the first direction; the rotary sleeve is rotatably sleeved on the first positioning piece, a sliding groove is formed in the outer peripheral wall of the first positioning piece, a stop block and a lock catch are arranged on the inner peripheral wall of the rotary sleeve, and the stop block is slidably arranged in the sliding groove; the elastic piece is arranged in the sliding groove; the second connector comprises a second positioning part and a sleeve, and the second positioning part comprises a second connecting end and a socket end which are opposite; a locking groove is formed in the peripheral wall of the second positioning piece; the sleeve penetrates through the second positioning piece along the first direction. The utility model discloses can realize the mutual locking of first connector and second connector automatically.

Description

Electric connector combination with self-locking function

Technical Field

The utility model relates to an electric connector technical field especially relates to an electric connector combination with self-locking function.

Background

The electrical connector assembly generally comprises a plug connector and a socket connector, and the plug connector and the socket connector are mutually matched and connected to realize electrical connection. The existing electric connector combination is easy to be separated from each other when being accidentally influenced by external force, so that the electric connection of the electric connector combination is accidentally disconnected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric connector combination with self-locking function to solve the electric connector combination among the prior art and throw off each other easily when the accident receives exogenic action, lead to the problem of the unexpected disconnection of electric connection of electric connector combination.

In order to solve the above technical problem, the utility model discloses a technical scheme provide an electric connector combination with self-locking function, include:

the first connector comprises a first insulating shell, a terminal, a first positioning piece, a rotary sleeve and an elastic piece, wherein the first positioning piece comprises a first connecting end and a plug end which are opposite, the first connecting end is arranged in the first insulating shell, the plug end extends along a first direction, and the plug end is provided with a slot; the terminal penetrates through the first positioning piece along the first direction, and one end of the terminal extends into the slot; the rotary sleeve is rotatably sleeved on the first positioning piece, a sliding groove is formed in the outer peripheral wall of the first positioning piece, a stop block and a lock catch are arranged on the inner peripheral wall of the rotary sleeve, and the stop block is slidably arranged in the sliding groove; the elastic piece is arranged in the sliding groove, one end of the elastic piece abuts against the stop block, and the other end of the elastic piece abuts against the groove wall of the sliding groove;

the second connector comprises a second positioning part and a sleeve, the second positioning part comprises a second connecting end and a socket end which are opposite, the socket end extends along the first direction, and the socket end is provided with a groove; a locking groove is formed in the peripheral wall of the second positioning piece and comprises an entering section and a clamping section; the sleeve penetrates through the second positioning piece along the first direction;

when the first connector and the second connector are connected in a matching mode along the first direction, the lock catch is inserted into the entering section, and under the action of elastic force of the elastic piece, the rotary sleeve is opposite to the first positioning piece to rotate and drive the lock catch to move to the clamping section.

In an embodiment of the present invention, an avoiding groove is formed on the outer peripheral wall of the first positioning member, and the avoiding groove is connected to one end of the sliding groove.

In an embodiment of the present invention, a handle is rotatably disposed on the first insulating housing, a shifting portion is disposed at one end of the handle, and a protrusion is disposed on an outer peripheral wall of the rotating sleeve and located on a rotation track of the shifting portion; the handle comprises an unlocking position in the rotating process, when the handle is located at the unlocking position, the shifting part pushes the convex block to drive the rotary sleeve to rotate relative to the first positioning piece and compress the elastic piece to enable the lock catch to be separated from the clamping section.

In an embodiment of the present invention, the inner peripheral wall of the rotating sleeve is further provided with a fool-proof block, the outer peripheral wall of the first positioning member is provided with a notch, and the notch corresponds to the fool-proof block.

In an embodiment of the present invention, a partition plate is disposed in the slot, and the partition plate is connected to the plug end to partition the slot into a plurality of slot areas; the terminals penetrate through the first positioning piece along the first direction, and one ends of the terminals penetrate into the slots and are distributed in different slot areas; a plurality of inserting blocks are arranged in the groove, and the inserting blocks and the inserting groove areas are arranged in a one-to-one correspondence mode.

In an embodiment of the present invention, the groove includes an annular groove and a spacing groove connected to each other, and the plurality of the inserts and the groove wall of the groove form the annular groove, and the plurality of the inserts form the spacing groove between two adjacent inserts, and the spacing groove corresponds to the partition plate.

The utility model discloses an embodiment, the terminal includes first terminal, second terminal and third terminal, the diameter of first terminal is greater than the diameter of second terminal, the diameter of second terminal is greater than the diameter of third terminal, first terminal has two, two first terminal sets up relatively and is located the difference respectively the slot region, the second terminal with the third terminal sets up relatively and is located the difference respectively the slot region.

In an embodiment of the present invention, the first connecting end of the first positioning member is provided with a first baffle, and the first baffle is used for separating two of the first terminal, the second terminal and the third terminal from each other.

In an embodiment of the present invention, the sleeve includes a first sleeve, a second sleeve and a third sleeve, the first sleeve, the second sleeve and the third sleeve are respectively provided with a jack, the first terminal can be plugged into the jack of the first sleeve, the second terminal can be plugged into the jack of the second sleeve, and the third terminal can be plugged into the jack of the third sleeve; the receptacle diameter of the first sleeve is greater than the receptacle diameter of the second sleeve, which is greater than the receptacle diameter of the third sleeve; the first sleeve pipes are arranged oppositely and are respectively positioned in different plug blocks, and the second sleeve pipe and the third sleeve pipe are arranged oppositely and are respectively positioned in different plug blocks.

In an embodiment of the present invention, the second connecting end of the second positioning member is provided with a second baffle, and the second baffle is used for separating the first sleeve, the second sleeve and the third sleeve from each other.

The utility model discloses an useful part lies in:

different from the prior art, by applying the technical scheme of the utility model, when the first connector and the second connector are matched and connected along the first direction, the plug end of the first connector is inserted into the groove of the socket end of the second connector, so that the first connector and the second connector can be tightly matched; meanwhile, the lock catch of the rotary sleeve is inserted into the entering section of the locking groove. When the first connector and the second connector are loosened manually, the rotary sleeve rotates relative to the first positioning piece to drive the lock catch to move to the clamping section under the action of elastic force of the elastic piece. Therefore, the first connector and the second connector can be automatically locked with each other, and even if the first connector and the second connector are accidentally acted by external force, the first connector and the second connector are not easy to separate from each other, so that the connection reliability and stability of the first connector and the second connector are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a first connector of an electrical connector assembly with a self-locking function according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first positioning element of a first connector of an electrical connector assembly with a self-locking function according to an embodiment of the present invention at a viewing angle;

fig. 3 is a schematic structural diagram of the first positioning element of the first connector of the electrical connector assembly with self-locking function according to another view angle in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the first positioning element of the first connector of the electrical connector assembly with self-locking function according to another view angle in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rotating sleeve of a first connector of an electrical connector assembly with a self-locking function according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second connector of the electrical connector assembly with self-locking function in an embodiment of the present invention at a viewing angle;

fig. 7 is a schematic structural diagram of the second connector of the electrical connector assembly with self-locking function in another view according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 7, an embodiment of the present invention provides an electrical connector assembly with a self-locking function, including: a first connector and a second connector.

The first connector comprises a first insulating shell 2, a terminal (not shown), a first positioning piece 3, a rotary sleeve 4 and an elastic piece (not shown), wherein the first positioning piece 3 comprises a first connecting end 3a and a plug end 3b which are opposite, the first connecting end 3a is arranged in the first insulating shell 2, the plug end 3b extends along a first direction, and the plug end 3b is provided with a slot 37; the terminal penetrates through the first positioning piece 3 along the first direction, and one end of the terminal extends into the slot 37; the rotary sleeve 4 is rotatably sleeved on the first positioning piece 3, a sliding groove 31 is formed in the outer peripheral wall of the first positioning piece 3, a stop block 42 and a lock catch 43 are arranged on the inner peripheral wall of the rotary sleeve 4, and the stop block 42 is slidably arranged in the sliding groove 31. The elastic member is disposed in the sliding slot 31, one end of the elastic member abuts against the stopper 42, and the other end of the elastic member abuts against a slot wall of the sliding slot 31.

The second connector comprises a second positioning member 5 and a sleeve (not shown), the second positioning member 5 comprises a second connecting end 5a and a socket end 5b which are opposite, the socket end 5b extends along a first direction, and the socket end 5b is provided with a groove 54; a locking groove 51 is formed in the peripheral wall of the second positioning piece 5, and the locking groove 51 comprises an entering section 511 and a clamping section 512; the sleeve is arranged through the second positioning element 5 in the first direction.

When the first connector and the second connector are connected in a matching manner along the first direction, the latch 43 is inserted into the entry section 511, and under the elastic force of the elastic member, the rotating sleeve 4 rotates relative to the first positioning member 3 to drive the latch 43 to move to the clamping section 512.

In the electrical connector assembly with the self-locking function, when the first connector and the second connector are matched and connected along the first direction, the plug end 3b of the first connector is inserted into the groove 54 of the socket end 5b of the second connector, so that the first connector and the second connector can be tightly matched; at the same time, the locker tabs 43 of the turnbuckle 4 are inserted into the entry sections 511 of the locker grooves 51. When the first connector and the second connector are loosened manually, the rotary sleeve 4 rotates relative to the first positioning member 3 to drive the lock catch 43 to move to the clamping section 512 under the action of the elastic force of the elastic member. Therefore, the first connector and the second connector can be automatically locked with each other, and even if the first connector and the second connector are accidentally acted by external force, the first connector and the second connector are not easy to separate from each other, so that the connection reliability and stability of the first connector and the second connector are improved.

In the embodiment, the plug end 3b is cylindrical, and the slot 37 is cylindrical and is coaxially disposed with the plug end 3b, so that the plug end 3b is annular and thin-walled. The groove 54 of the socket end 5b has a cylindrical shape, and the inner diameter of the groove 54 is equal to the outer diameter of the plug end 3b, so that the plug end 3b can be fitted into the groove 54 of the socket end 5 b.

The embodiment of the utility model provides an in, be provided with on the periphery wall of first locator piece 3 and dodge groove 391, dodge groove 391 and be connected with the one end of spout 31. In this way, when the rotating sleeve 4 is assembled to the first positioning member 3 in the first direction, the avoiding groove 391 can avoid the stopper 42 of the rotating sleeve 4, and the stopper 42 slides into the sliding groove 31 from the avoiding groove 391 and abuts against one end of the elastic member.

In the embodiment of the present invention, the entering section 511 is in a horn shape, the opening at one end of the entering section 511 close to the first connector is large, and the other end of the entering section 511 is connected to the clamping section 512. In this manner, the lock 43 of the swivel nut 4 is facilitated to slide in from the entry section 511.

In the embodiment of the present invention, the first insulating housing 2 is rotatably provided with the handle 1. Therefore, the first connector can be conveniently pulled out of the second connector manually, and time and labor are saved.

In the embodiment, the handle 1 is U-shaped, the inner sidewall of the handle 1 is provided with a rotating shaft portion 11, the first insulating housing 2 is provided with a rotating shaft hole 21, and the rotating shaft portion 11 is rotatably disposed in the rotating shaft hole 21. In this way, the handle 1 can be rotated relative to the first insulating housing 2.

Furthermore, one end of the handle 1 is provided with a toggle part 12, the outer peripheral wall of the rotary sleeve 4 is provided with a convex block 41, and the convex block 41 is positioned on the rotating track of the toggle part 12. The handle 1 comprises an unlocking position in the rotating process, when the handle 1 is located at the unlocking position, the shifting part 12 pushes the convex block 41 to drive the rotating sleeve 4 to rotate relative to the first positioning piece 3 and compress the elastic piece to enable the lock catch 43 to be separated from the clamping section 512, namely, the lock catch 43 moves from the clamping section 512 to the entering section 511, and at the moment, the handle 1 can be held manually to pull out the first connector from the second connector.

The embodiment of the utility model provides an in, still be provided with on the internal perisporium of cover 4 soon and prevent slow-witted piece 44, be provided with breach 392 on the periphery wall of first retainer 3, breach 392 is corresponding with the position of preventing slow-witted piece 44. So, will revolve cover 4 and assemble in first locating piece 3 along first direction, can play the foolproof effect, guarantee to revolve the assembled position and the direction accuracy of cover 4.

The embodiment of the utility model provides an in, first link 3a of first locating piece 3 is provided with external screw thread 32,

first link

3a and 2 threaded connection of first insulating housing.

The embodiment of the utility model provides an in, be provided with division board 38 in the slot 37, division board 38 is connected with plug end 3b, separates into a plurality of slot districts with slot 37. The terminal runs through first setting of locator 3 along first direction, and the one end of terminal runs through to in the slot 37, and distributes in different slot regions. A plurality of insertion blocks 53 are arranged in the groove 54, and the plurality of insertion blocks 53 are arranged in one-to-one correspondence with the plurality of insertion groove areas, so that the plurality of insertion blocks 53 can be in insertion fit with the plurality of corresponding insertion groove areas. Therefore, when the first connector and the second connector are matched along the first direction, the plurality of inserting blocks 53 of the second connector can be inserted into the plurality of inserting groove regions of the first connector, so that the first connector and the second connector can be further ensured to be tightly matched, and the connection of the first connector and the second connector is more reliable and stable.

In an embodiment of the present invention, the groove 54 includes an annular groove 541 and a spacing groove 542 connected to each other. An annular groove 541 is formed between the plurality of insertion blocks 53 and the groove wall of the groove 54, a spacing groove 542 is formed between every two insertion blocks 53, and the spacing groove 542 is arranged corresponding to the partition plate 38. When the first connector is mated with the second connector in the first direction, the partition plate 38 of the first connector is inserted into the spacing groove 542 of the second connector. Therefore, the first connector and the second connector can be tightly matched, and the connection between the first connector and the second connector is more reliable and stable.

Further, the partition plate 38 is substantially "X" shaped, and the slot 37 is divided into four slot areas by the partition plate 38; correspondingly, the number of the insertion blocks 53 is four, and the four insertion blocks 53 form an "X" shaped spacing groove 542 therebetween.

The utility model discloses an in the embodiment, the terminal includes first terminal, second terminal and third terminal, and the diameter of first terminal is greater than the diameter of second terminal, and the diameter of second terminal is greater than the diameter of third terminal, and first terminal has two, and two first terminal relative settings just are located different slot regions respectively, and second terminal and third terminal relative setting just are located different slot regions respectively. So, two first terminal alternate segregation, two first terminals and second terminal and third terminal alternate segregation, second terminal and third terminal alternate segregation to avoid the great first terminal of diameter to generate heat and scald the influence to second terminal and third terminal, also avoid the great second terminal of diameter to generate heat and scald the influence to the third terminal, make first connector high temperature resistant, long service life.

In the embodiment, the partition plate 38 includes a first portion and a second portion intersecting with each other, a slot area b is formed between an upper end of the first portion and an upper end of the second portion, a slot area a is formed between an upper end of the first portion and a lower end of the second portion, a slot area c is formed between an upper end of the second portion and a lower end of the first portion, and a slot area d is formed between a lower end of the second portion and a lower end of the first portion. One end of each of the two first terminals penetrates through the slot region a and the slot region c respectively. One end of the second terminal penetrates through the slot region b, and one end of the third terminal penetrates through the slot region d.

Specifically, the number of the second terminals is one, and the number of the third terminals is five.

Further, the lengths of the two first terminals are not equal. Thus, the function of preventing the short circuit by misplugging can be achieved.

Further, the first connecting end 3a of the first positioning member 3 is provided with a first baffle 33, the first baffle 33 is used for separating the two first terminals, the second terminal and the third terminal from each other, the first terminal with the larger diameter is prevented from generating heat to scald the cable sheaths of the second terminal and the third terminal, the second terminal with the larger diameter is also prevented from generating heat to scald the cable sheaths of the third terminal, and therefore the first connector is high-temperature resistant and long in service life.

The embodiment of the utility model provides an in, first locating piece 3 link up along the first direction and is provided with first through-hole 34, second through-hole 35 and third through-hole 36, and first terminal setting is in first through-hole 34, and the second terminal setting is in second through-hole 35, and the third terminal setting is in third through-hole 36. It can be understood that the number and the position distribution of the first through holes 34, the second through holes 35, and the third through holes 36 are matched with the first terminals, the second terminals, and the third terminals, and thus the description thereof is omitted.

The embodiment of the utility model provides an in, the sleeve pipe includes first sleeve pipe, second sleeve pipe and third sleeve pipe, and first sleeve pipe, second sleeve pipe and third sleeve pipe are provided with the jack respectively, and first terminal can be pegged graft in first sheathed tube jack, and second terminal can be pegged graft in second sheathed tube jack, and the third terminal can be pegged graft in third sheathed tube jack. The diameter of the jack of the first sleeve is larger than that of the jack of the second sleeve, and the diameter of the jack of the second sleeve is larger than that of the jack of the third sleeve. The first sleeve pipe has two, and two first sleeve pipes set up relatively and are located different inserted blocks 53 respectively, and second sleeve pipe and third sleeve pipe set up relatively and are located different inserted blocks 53 respectively.

Specifically, the number of the second sleeves is one, and the number of the third sleeves is five.

The embodiment of the utility model provides an in, second setting element 5 link up along first direction and is provided with fourth through-hole 55, fifth through-hole 56 and sixth through-hole 57, and first sleeve setting is in fourth through-hole 55, and the second sleeve setting is in fifth through-hole 56, and the third sleeve setting is in sixth through-hole 57. It can be understood that the number and the position distribution of the fourth through holes 55, the fifth through holes 56 and the sixth through holes 57 are matched with the first sleeve, the second sleeve and the third sleeve, and thus the description thereof is omitted.

The embodiment of the utility model provides an in, second link 5a of second setting element 5 is provided with second baffle 52, and second baffle 52 is used for separating two first sleeve pipes, second sleeve pipe and third sleeve pipe each other.

The embodiment of the utility model provides an in, the extending direction of first insulating housing 2 is perpendicular with first direction for first insulating housing 2 is 90 elbows designs, and occupation space is littleer during the use.

In the embodiment of the present invention, the electrical connector assembly with self-locking function further includes a second insulating housing, and the second connecting end 5a of the second connector is disposed in the second insulating housing (not shown).

In the embodiment of the utility model, the elastic component adopts the spring.

The embodiment of the utility model provides an in, the terminal adopts silver-plated terminal, and sheathed tube jack adopts the crown spring hole.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An electrical connector assembly with self-locking features, comprising:

2. The electrical connector assembly with the self-locking function of claim 1, wherein an avoiding groove is formed in the outer peripheral wall of the first positioning member, and the avoiding groove is connected with one end of the sliding groove.

3. The electrical connector assembly with the self-locking function as recited in claim 1, wherein a handle is rotatably disposed on the first insulating housing, a toggle portion is disposed at one end of the handle, and a protrusion is disposed on an outer peripheral wall of the rotating sleeve and located on a rotation track of the toggle portion; the handle comprises an unlocking position in the rotating process, when the handle is located at the unlocking position, the shifting part pushes the convex block to drive the rotary sleeve to rotate relative to the first positioning piece and compress the elastic piece to enable the lock catch to be separated from the clamping section.

4. The electrical connector assembly with the self-locking function of claim 1, wherein a fool-proof block is further disposed on the inner peripheral wall of the rotary sleeve, and a notch is disposed on the outer peripheral wall of the first positioning member, and corresponds to the fool-proof block.

5. The electrical connector assembly with self-locking function of claim 1, wherein a partition plate is disposed in the slot, and the partition plate is connected to the plug end to partition the slot into a plurality of slot regions; the terminals penetrate through the first positioning piece along the first direction, and one ends of the terminals penetrate into the slots and are distributed in different slot areas; a plurality of inserting blocks are arranged in the groove, and the inserting blocks and the inserting groove areas are arranged in a one-to-one correspondence mode.

6. The electrical connector assembly with self-locking function as claimed in claim 5, wherein the recess includes an annular groove and a spacing groove connected to each other, the annular groove is formed between a plurality of the insertion blocks and a wall of the recess, the spacing groove is formed between every two insertion blocks, and the spacing groove is disposed corresponding to the partition plate.

7. The electrical connector assembly as recited in claim 5, wherein the terminals include a first terminal, a second terminal and a third terminal, the first terminal has a diameter larger than that of the second terminal, the second terminal has a diameter larger than that of the third terminal, the first terminals are two, the two first terminals are disposed opposite to each other and located in different slot regions, respectively, and the second terminal is disposed opposite to the third terminal and located in different slot regions, respectively.

8. The electrical connector assembly with self-locking function of claim 7, wherein the first connecting end of the first positioning member is provided with a first baffle plate, and the first baffle plate is used for separating the two first terminals, the second terminal and the third terminal from each other.

9. The electrical connector assembly with self-locking function of claim 7, wherein the sleeve comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve, the second sleeve and the third sleeve are respectively provided with a jack, the first terminal can be plugged into the jack of the first sleeve, the second terminal can be plugged into the jack of the second sleeve, and the third terminal can be plugged into the jack of the third sleeve; the receptacle diameter of the first sleeve is greater than the receptacle diameter of the second sleeve, which is greater than the receptacle diameter of the third sleeve; the first sleeve pipes are arranged oppositely and are respectively positioned in different plug blocks, and the second sleeve pipe and the third sleeve pipe are arranged oppositely and are respectively positioned in different plug blocks.

10. The electrical connector assembly with self-locking function of claim 9, wherein the second connecting end of the second positioning member is provided with a second baffle, and the second baffle is used for separating the two first sleeves, the second sleeve and the third sleeve from each other.