Contact element, connector shell and connector

Abstract

A contact element, a connector shell and a connector relate to the technical field of connectors, the contact element is a plate end contact element or a wire end contact element with an integrated structure, the connector shell is integrally formed, and a terminal cavity used for installing the contact element is arranged in the connector shell. A clamping jaw ring groove which is matched with the first clamping jaw or the second clamping jaw to axially limit the contact piece is formed in the terminal cavity, a matched connection structure used for plastic packaging or installation is arranged on the surface of the tail of the connector shell, and the head, used for insertion, of the connector shell is provided with an elastic buckle structure or a buckle locking structure. The connector is a male end connector or a female end connector and comprises a connector shell and a contact piece installed in the connector shell, when the contact piece is a line end contact piece, the connector further comprises a plastic package body, and the connector can be used for being directly connected with a circuit board and is low in assembly difficulty, simple in structure and small in overall size.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, in particular to a contact piece, a connector housing and a connector. Background Art

[0002] Photovoltaic power generation, as a sustainable clean energy, has been rapidly developing and applied in recent years. Micro inverters are an important component of photovoltaic grid-connected power generation. They play an important role in converting the DC power produced by photovoltaic panels into AC power and transmitting it to the power grid. They are also gradually developing in the direction of smaller size, more reliable and more economical. Micro inverters are connected to photovoltaic panels, junction boxes and other equipment through photovoltaic connectors and components. Due to the small size of micro inverters, the installation space of the adapted connectors is limited, and the connectors are required to be as small as possible and simple and convenient to install. Usually, the single-core DC connectors, multi-core AC connectors and other interfaces required by micro inverters are set on the side, welded to the circuit board inside, and fixed by the outer shell outside. Finally, the micro inverter equipment is encapsulated by filling epoxy glue inside the whole. For example, the ENPFASE micro inverter integrates all board-end connectors on a panel, and then installs them on the micro inverter equipment as a whole. The connector mold structure is relatively complex, and the product is prone to warping, which causes the risk of product sealing failure.

[0003] At present, the wiring methods of photovoltaic line-end connectors can be divided into assembly methods and integrated plastic sealing molding, such as CN217934331 U and CN 117791214 A. The former connector contains multiple parts such as connector housing, contacts, seals, locking parts, etc., with a complex structure and a cumbersome installation process. The latter is a connector assembly, and the connector is directly plastic sealed in the factory after wiring, but there is a risk of poor sealing. Neither of them provides board-end connector solutions. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a contact piece, a connector housing and a connector, which can be used for direct connection with a circuit board, have low assembly difficulty, simple structure and small overall size.

[0005] In order to achieve the above technical purpose, the adopted technical solution is: a contact piece, the contact piece is a plate end contact piece or a line end contact piece; The board-end contact piece is an integrated structure extending in the axial direction, one end of which is a first connection end for plugging and mating with the line-end contact piece, and the other end of which is a board connection end for fixing on the circuit board and electrically connected to the circuit board. The board connection end is a plate-shaped structure, the tail of the first connection end is electrically connected to the board connection end, and a first claw is provided in the middle of the first connection end; The wire end contact piece is an integrated structure extending axially, one end of which is a second connecting end for plugging and mating with the board end contact piece, and the other end of which is a wire connection end for fixing the wire and electrically connecting to the wire. The tail of the second connecting end is electrically connected to the wire connection end, and a second claw is provided in the middle of the wire connection end.

[0006] The tail surface of the first connecting end of the present invention is also provided with a first convex rib to prevent deflection.

[0007] The board-end contact piece of the present invention is also provided with an elastic connection portion electrically connecting the first connection end and the board connection end. The elastic connection portion can axially deform to change the distance between the board connection end and the first connection end.

[0008] The plate connection end or the elastic connection part of the present invention is provided with a mounting groove into which a tool can be inserted to perform axial pushing.

[0009] The end of the board connection terminal described in the present invention is a convex key structure for inserting into the circuit board.

[0010] The wire connection end of the present invention is a U-shaped tail wing structure.

[0011] The second connecting end of the present invention is provided with a baffle for partitioning.

[0012] A connector shell is integrally formed, and a terminal cavity for installing the contact piece is arranged inside the connector shell. A claw ring groove is arranged in the terminal cavity to cooperate with a first claw or a second claw to axially limit the contact piece. A matching connection structure for plastic sealing or installation is arranged on the rear surface of the connector shell, and the head of the connector shell for plugging has an elastic snap structure or a snap locking structure.

[0013] The matching connection structure of the present invention comprises a second rib and an annular groove arranged along the axial direction.

[0014] The tail of the terminal cavity of the present invention is provided with a positioning groove into which the anti-swaying structure is inserted.

[0015] When the two connector housings are plugged together, a key is arranged on the plugging surface of one connector housing, and a groove is arranged on the plugging surface of the other matching connector housing, and the groove and the key form a slot-key structure for plugging and matching.

[0016] A connector, comprising the connector housing and a contact installed in the connector housing; When the contact piece is a line end contact piece, the connector further comprises a plastic encapsulation body, which is combined with the matching connection structure and covers the tail of the connector housing and the tail of the line end contact piece.

[0017] The outer periphery of the connector housing of the present invention is provided with a sealing ring groove, and a sealing ring is tightly installed in the sealing ring groove.

[0018] When the plug-in head of the connector housing is provided with an elastic snap-fit ​​structure, a space is provided between the outer side wall of the housing forming the terminal cavity and the elastic snap-fit ​​structure, which forms a wrapping effect when the adapter housing is inserted and can cover the sealing ring.

[0019] The beneficial effects of the present invention are: 1. The present application provides a contact piece that can cooperate with each other to achieve the connection between the line end and the board end. The overall design is an integrated structure with a simple structure and small size, which is easy to install and fix inside the connector housing.

[0020] 2. The first rib structure can clearly identify the position of the board-end contact after it is inserted into the connector housing, thereby preventing the contact from swinging and affecting alignment with the circuit board.

[0021] 3. The elastic connection part gives the board connection end a certain flexibility, and the position deviation caused by assembly can be corrected when the board connection end is installed on the board.

[0022] 4. Use the tool to press against the installation groove to assemble the board end contact to avoid pushing on the board end and causing deformation.

[0023] 5. The convex key structure cooperates with the slot of the circuit board to limit the board connection end, making the contact more complete and facilitating welding and fixation.

[0024] 6. The wire connection terminal is designed as a U-shaped tail structure, which is convenient for clamping and fixing the wire.

[0025] 7. A baffle for isolation is set inside the line end contact to prevent the glue at the tail of the contact from flowing into the contact and affecting the conductive effect of the plug.

[0026] 8. The connection housing of the present application is integrally formed, and the overall size and space are further reduced. The connector housing is universal, and board-end contacts or line-end contacts can be installed therein according to installation requirements.

[0027] 9. The slot key structure can be used to quickly align the connector housings.

[0028] 10. The connector uses a smaller connector shell and a simpler contact structure, which is convenient for use in photovoltaic connectors. The plastic sealing body is used for plastic sealing at the wire connection position. The process is simple, the wire is not easy to bend, and the overall size utilizes a small space. It can be flexibly combined with board-end contacts and line-end contacts according to the environment and used in different working environments.

[0029] 11. Add the sealing ring to the female connector housing to improve the sealing effect.

[0030] 12. The connector assembly of the present application is composed of a female connector and a male connector, with few components. The contacts in the male and female ends can be replaced according to the use environment. It is flexible to use and can be directly applied to the micro inverter. It does not require other interfaces and can be directly installed on the mounting panel of the micro inverter so that the board terminal and the printed circuit board can be plugged in. It takes up little space and is quicker to use. The locking structure composed of the elastic snap structure and the snap locking structure occupies less space than other locking structures and has an anti-misunderstanding locking effect.

[0031] 13. On the basis of the mating of the female connector and the male connector, the terminal cavity of the male connector wraps the terminal cavity of the female connector, which can not only reduce the axial size of the connector assembly, but also play a dual protection role for the mating contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the connector assembly of the present invention; Figure 2 It is a schematic diagram of the board end installation of the connector of the present invention; Figure 3 This is a schematic diagram of the female connector of the present invention; Figure 4 This is a schematic diagram of the male connector of the present invention; Figure 5 It is a schematic cross-sectional view of the housing of the female connector of the present invention; Figure 6 This is a schematic diagram of the right side of the female connector housing of the present invention; Figure 7 It is a schematic diagram of the left side of the female connector housing of the present invention; Figure 8 It is a schematic cross-sectional view of the male connector housing of the present invention; Fig. 9 It is a schematic diagram of the right side of the male connector housing of the present invention; Fig.10 It is a schematic diagram of the left side of the male connector housing of the present invention; Fig.11 is a schematic structural diagram of a contact member of the present invention; Fig.12 It is a schematic structural diagram of a partition of the present invention; Fig.13 It is a schematic diagram of the application of the connector of the present invention; Fig.14 This is a schematic diagram of the female connector of the present invention; Fig.15 This is a schematic diagram of the male connector of the present invention; In the figure: 1. Connector assembly; 11. male connector, 11-1. snap-on locking structure, 12-2. male connector housing; 12. female connector, 12-1. elastic buckle structure, 12-2. female connector housing, 12-21. sealing ring groove, 12-22. sealing ring; 2. Circuit board; 3. Connector housing; 31, terminal cavity, 31-1, positioning groove, 31-2, claw ring groove; 32. Coordinating connection structure, 32-1. Second convex rib, 32-2. Annular groove; 33, slot key structure, 33-1, second convex rib, 33-2, fourth convex rib, 33-3, positioning groove, 33-4, limiting groove; 4. Board-end connector; 41. a first connecting end, 41-1. a first convex rib; 42, plate connection end, 42-1, mounting groove, 42-2, convex key structure; 43. First jaw; 5. Wire end contacts; 51, second connection end, 51-1, baffle; 52, wire connection end, 53, second claw; 6. Wire, 7. Plastic package, 8. Micro inverter housing; S1. Space. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0036] The directions or positional relationships indicated by the words "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings, and are only for the convenience of simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish similar objects, and cannot be understood as a specific order or sequence, and it should be understood that such usage can be interchangeable under appropriate circumstances.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integral connection. A person of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0038] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0039] like Figure 1 , Figure 2 , Fig.11 As shown, a contact piece is a board-end contact piece 4 or a line-end contact piece 5; the board-end contact piece 4 is an integrated structure extending in the axial direction, one end of which is a first connecting end 41 of the adapter contact piece, the first connecting end 41 can be a plug-in structure or a plug structure, which is selected according to whether it is installed at the male end or the female end, and the other end is a board connection end 42 for fixing on the circuit board 2 and electrically connected to the circuit board 2. The board connection end 42 is a plate-like structure, which is usually used to be inserted into a prefabricated groove matching the circuit board 2 for assembly and welding. The tail of the first connection end 41 is electrically connected to the board connection end 42, and the first connection end A first claw 43 is provided in the middle of 41, and the first claw 43 is used for axial limiting during installation; the wire end contact 5 is an integrated structure extending in the axial direction, one end of which is a second connection end 51 for plugging and matching with the adapter contact, and the second connection end 51 can be a plug cavity structure or a plug structure, which is selected according to whether it is installed at the male end or the female end, and the other end is a wire connection end 52 for fixing the wire 6 and electrically connecting with the wire 6, and the tail of the second connection end 51 is electrically connected to the wire connection end 52, and a second claw 53 is provided in the middle of the wire connection end 52, and the second claw 53 is also axially limited during installation. The overall structure of the contact is simple, without redundant parts, the overall structure size is small, docking and connection are convenient, and the plug-in connection between the board end and the wire end can be realized. The adapter contact is a board end contact or a wire end contact.

[0040] like Fig.11 As shown, in order to ensure that after the contact is installed in the connector housing 3, the board-end contact 4 does not deflect and affect the positional relationship with the circuit board 2, a first anti-deflection rib 41-1 is added on the tail surface of the first connecting end 41 to cooperate with the positioning groove 31-1 in the connector housing 3, clarify the positional relationship between the board connection end 42 and the circuit board 2, and install more quickly.

[0041] like Fig.11 As shown, the board-end contact piece 4 is also provided with an elastic connecting portion 44 electrically connecting the first connecting end 41 and the board connecting end 42. The elastic connecting portion 44 can axially deform to change the distance between the board connecting end 42 and the first connecting end 41. The elastic connecting portion 44 shown in the figure is a bending structure that is bent twice and has an elastic shrinkage deformation function. According to the required elastic deformation state, a bending structure with different bending degrees and bending times is selected.

[0042] like Fig.11 As shown, the plate connection end 42 or the elastic connection part 44 is provided with a mounting groove 42-1 which can be inserted with a tool for axial pushing. When the mounting groove 42-1 is pushed, the pushing position or the force-bearing surface of the mounting groove 42-1 faces the direction of the first connection end 41. The pushed position of the mounting groove 42-1 is closer to the tail of the first connection end 41. When installing the contact piece, there is no need to push the plate connection end 42 to avoid deformation of the plate connection plate 42 under force. The contact piece is assembled by pressing the tool against the mounting groove 42-1.

[0043] like Figure 3 , Fig.11 As shown, the end of the board connection terminal 42 is a convex key structure 42-2 for inserting the circuit board 2. The convex key structure 42-2 is used to cooperate with the prefabricated groove of the circuit board 2, which can limit the insertion direction of the board connection terminal 42 and the circuit board 2, and increase the contact area between the board connection terminal 42 and the circuit board 2, thereby fully realizing the conductive connection and facilitating the welding operation.

[0044] like Fig.12 As shown, the wire connection terminal 52 is a U-shaped tail wing structure, which can not only support and fix the protective wire, but also facilitate connection with the wire 6.

[0045] like Fig.12 As shown, a baffle 51 - 1 is provided inside the second connection end 51 for partitioning, and the baffle 51 - 1 is tightly fitted to the inner wall of the contact piece to ensure that the glue does not flow from the tail of the contact piece into the connection end of the contact piece during glue pouring.

[0046] like Figure 5 , Figure 8As shown, a connector shell, the connector shell 3 is integrally formed, and a terminal cavity 31 for installing the contact piece is arranged inside the connector shell, and the number of terminal cavities 31 is not limited. Compared with the connector shell formed by the same number of terminal cavities in the prior art, the connector shell is based on the above-mentioned contact piece, and the structure is simpler and the size is significantly reduced. A claw ring groove 31-2 is provided in the terminal cavity 31 for cooperating with the first claw 43 or the second claw 53 to axially limit the contact piece. The tail surface of the connector shell 3 is provided with a matching connection structure 32 for plastic sealing or installation. The matching connection structure 32 can be matched with the micro-inverter mounting panel, and a threaded or slot structure can be adopted to ensure that the shell is firmly locked on the micro-inverter, and it can also be tightly combined with the reverse sealing body 7 and adopt a slot structure. The head of the connector housing 3 for plugging has an elastic buckle structure 12-1 or a buckle locking structure 11-1, which plays an automatic locking role when plugging. This structure occupies a small space, can be quickly plugged and locked, and can also play a role in judging the alignment of the contact pieces. When the wire end contact piece 5 is installed in the connector housing, such as Fig.13 As shown, the wires can be used for free combination, for example, (a) schematically shows the female end connected to the female end, (b) schematically shows the male end connected to the male end, (c) schematically shows the male end connected to the female end, and the matching connectors can be plugged in according to different connection forms.

[0047] like Figure 6 , Fig. 9 As shown, the mating connection structure 32 includes a second convex rib 32-1 and an annular groove 32-2 arranged along the axial direction. The number of convex ribs and annular grooves is not limited. The annular groove and convex rib structure can increase the contact area between the connector housing 3 and the plastic package 7, ensuring that the connector has good sealing performance.

[0048] like Figure 6 , Fig. 9 As shown, the tail of the terminal cavity 31 is provided with a positioning groove 31-1 which cooperates with the first rib 41-1 and is inserted therein. The positioning groove 31-1 is used to cooperate with the first rib 41-1 when the contact is inserted, so as to limit the rotation of the contact in the circumferential direction and affect the docking installation with the circuit board 2.

[0049] The two connector housings 3 are plugged into each other, one connector housing 3 has a key on its plugging surface, the other matching connector housing 3 has a slot on its plugging surface, and the two plugged connector housings 3 have a matching slot-key structure 33 between their plugging surfaces. The plugging surface is the housing surface that can wrap around the terminal cavity, for example: Figure 7 As shown, the outer surface of the female connector housing 12-2 forming the terminal cavity is provided with four positioning grooves 33-3 and one limiting groove 33-4. Fig.10As shown, the male connector housing 11-2 is provided with four third ribs 33-1 on the mating surface thereof, which are matched with the positioning grooves 33-3, and four fourth ribs 33-2 are provided adjacent to the third ribs 33-1 for inserting into the limiting grooves 33-4. When the male / female ends are mated, the ribs are matched with the grooves, and the connectors are guided to be mated at multiple locations.

[0050] A connector, the connector is a male connector 11 or a female connector 12; Figure 3 The female connector 12 is shown. Figure 4 The male connector 11 is shown; the connector has a simple structure and a small size, and can be used to install a line end contact or a board end contact. The contact installed in the male connector 11 is a board end contact 4, and the contact installed in the female connector 12 is a line end contact 5. Fig.14 The female connector 12 is shown. Fig.15 What is shown is a male connector 11, in which the contact installed in the male connector 11 is a line-end contact 5, and the contact installed in the female connector 12 is a board-end contact 4. The male connector 11 includes a connector housing 3 with a snap-on locking structure 11-1 as a male connector housing 11-2, and a contact installed in the male connector housing 11-2; the female connector 12 includes a connector housing 3 with an elastic snap-on structure 12-1 as a female connector housing 12-2, and a contact installed in the female connector housing 12-2; when the installed contact is a line-end contact 5, the connector further includes a plastic package 7, which is combined with a mating connection structure 32 to cover the tail of the connector housing 3 and the tail of the line-end contact 5. As shown Figure 1 As shown, the plastic sealing body 7 includes a first plastic sealing body and a second plastic sealing body. The first plastic sealing body is tightly fitted with the cavity at the rear of the connector shell, the rear of the line end contact, and part of the wire connected to the rear of the line end contact for plastic sealing. After the first plastic sealing body is sealed, the second plastic sealing body is firstly coated on the rear of the connector shell for connection and fixation with the connector shell, and then coated on the periphery of the entire first plastic sealing body, and is tightly fitted with the annular groove and convex rib at the rear of the connector shell, the first plastic sealing body, and the wire.

[0051] like Figure 3 , Figure 6 As shown, a sealing ring groove 12-21 is provided on the outer periphery of the female connector housing 12-2, and a sealing ring 12-22 is tightly installed in the sealing ring groove 12-21. By directly providing the sealing ring groove 12-21 on the female connector housing 12-2, there is no need to prepare or set up additional sealing components, and the sealing can be completed by directly plugging with the male connector housing 11-2.

[0052] like Figure 1As shown, a connector assembly includes the male connector 11 and the female connector 12, the elastic buckle structure 12-1 and the buckle locking structure 11-1 cooperate to ensure the axial plug-in locking of the male connector 11 and the female connector 12, and the male connector 11 and the female connector 12 are respectively installed with the board contact 4 and the line contact 5. The connector assembly uses fewer parts and can be directly installed in the housing of the micro inverter to complete the connection between the line end and the board end. It is convenient and quick to use, occupies a small space, and greatly reduces the difficulty of assembly.

[0053] like Figure 1 , Figure 7 As shown, when the plug-in head of the connector housing 3 is provided with an elastic snap-fit ​​structure 12-1, a space S1 is provided between the outer wall of the housing forming the terminal cavity 31 and the elastic snap-fit ​​structure 12-1. When the adapter housing is inserted, the two plugged connector housings 3 are wrapped together and can cover the sealing ring 12-22. The wrapping form in the space S1 is not limited. For example, when plugged and locked, the terminal cavity 31 of the male connector 11 wraps the terminal cavity 31 of the female connector 12. By using the existing structure, the contacts are wrapped together to play the role of two layers of housing protection, and the axial size of the connector assembly can be further reduced.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit or restrict the present invention. For researchers or technicians in this field, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection declared by the present invention.

Claims

1. A contact, characterized in that: The contact piece is a plate end contact piece (4) or a line end contact piece (5); The board-end contact piece (4) is an integrated structure extending in the axial direction, one end of which is a first connection end (41) for plugging and mating with the line-end contact piece (5), and the other end of which is a board connection end (42) for being fixed on the circuit board (2) and electrically connected to the circuit board (2), the board connection end (42) being a plate-shaped structure, the tail of the first connection end (41) being electrically connected to the board connection end (42), and a first claw (43) being provided in the middle of the first connection end (41); The wire end contact piece (5) is an integrated structure extending in the axial direction, one end of which is a second connection end (51) for plugging and mating with the board end contact piece (4), and the other end of which is a wire connection end (52) for fixing the wire (6) and electrically connecting to the wire (6), the tail of the second connection end (51) is electrically connected to the wire connection end (52), and a second claw (53) is provided in the middle of the wire connection end (52).

2. A contact member according to claim 1, characterized in that: A first anti-swaying rib (41-1) is also provided on the tail surface of the first connecting end (41).

3. A contact member according to claim 1, characterized in that: The board-end contact piece (4) is also provided with an elastic connection portion (44) electrically connecting the first connection end (41) and the board connection end (42); the elastic connection portion (44) is capable of axially deforming to change the distance between the board connection end (42) and the first connection end (41).

4. A contact piece according to claim 1 or 3, characterized in that: The plate connection end (42) or the elastic connection portion (44) is provided with a mounting groove (42-1) into which a tool can be inserted for axial pushing.

5. A contact member according to claim 1, characterized in that: The end of the board connection terminal (42) is a convex key structure (42-2) for inserting into the circuit board (2).

6. A contact member according to claim 1, characterized in that: The wire connection end (52) is a U-shaped tail wing structure.

7. A contact member according to claim 1, characterized in that: A baffle (51-1) for partitioning is provided inside the second connecting end (51).

8. A connector housing, characterized in that: The connector housing (3) is integrally formed, and is provided with a terminal cavity (31) for mounting a contact piece as claimed in any one of claims 1 to 7. A claw ring groove (31-2) is provided in the terminal cavity (31) for cooperating with a first claw (43) or a second claw (53) to axially limit the contact piece. A mating connection structure (32) for plastic sealing or mounting is provided on the rear surface of the connector housing (3). The head of the connector housing (3) for plugging has an elastic snap structure (12-1) or a snap locking structure (11-1).

9. A connector housing according to claim 8, characterized in that: The matching connection structure (32) comprises a second convex rib (32-1) and an annular groove (32-2) arranged along the axial direction.

10. A connector housing according to claim 8, characterized in that: The tail of the terminal cavity (31) is provided with a positioning groove (31-1) into which the anti-sway structure is inserted.

11. A connector housing according to claim 8, characterized in that: When the two connector housings (3) are plugged together, a key is provided on the outer plugging surface of the terminal cavity (31) of one of the connector housings (3), and a groove is provided on the plugging surface of the other matching connector housing (3), and the groove and the key form a slot-key structure (33) for plugging and matching.

12. A connector, characterized in that: Comprising a connector housing (3) as claimed in any one of claims 8 to 11, and a contact piece installed in the connector housing (3); When the contact piece is a line end contact piece (5), the connector further comprises a plastic encapsulation body (7), the plastic encapsulation body (7) being combined with the matching connection structure (32) and covering the tail of the connector housing (3) and the tail of the line end contact piece (5).

13. A connector according to claim 11, characterized in that: A sealing ring groove (12-21) is provided on the outer periphery of the connector housing (3), and a sealing ring (12-22) is tightly installed in the sealing ring groove (12-21).

14. A connector according to claim 13, characterized in that: When the plug-in connector portion of the connector housing (3) is provided with an elastic snap-fit ​​structure (12-1), a space (S1) is provided between the outer side wall of the housing that forms the terminal cavity (31) and the elastic snap-fit ​​structure (12-1); when the adapter housing is inserted, the space (S1) forms a mutually wrapping effect on the two inserted connector housings (3) and can cover the sealing ring (12-22).

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