CN109273917B - Waterproof connector female head and waterproof connector - Google Patents

Abstract

The invention discloses a waterproof connector female head and a waterproof connector, wherein the waterproof connector female head comprises a socket body, a first shielding main body and a first sealing piece, the socket body is provided with a first connecting cavity, and the first connecting cavity is provided with a mounting cavity opening and a male head inserting cavity opening; the first shielding main body comprises a plug-in section, and the plug-in section is correspondingly plugged in the first connecting cavity through the mounting cavity opening; the first sealing piece is arranged between the inner wall surface of the first connecting cavity and the outer peripheral surface of the plug section, and is used for sealing a gap between the inner wall surface of the mounting cavity opening and the plug section. According to the waterproof connector female head, the gap between the inner wall surface of the mounting cavity opening and the plug-in section is blocked by using the first sealing piece, so that external liquid cannot flow into the first connecting cavity through the mounting cavity opening to affect the plug-in section of the first shielding main body, and the waterproof performance of the waterproof connector female head is better.

Description

Waterproof connector female head and waterproof connector

Technical Field

The invention relates to the field of automobile accessories, in particular to a waterproof connector female head and a waterproof connector.

Background

With the development of multi-functionalization and interconnection informatization of vehicles, environmental requirements for standard connectors of the automotive electronics industry have become more stringent. The existing connector is generally provided with two connector terminals, one male terminal is matched with the other female terminal, the existing connector terminals are generally formed by plastic, after the two connector terminals are matched, a certain gap exists between the connector terminals, liquid easily enters the connector terminals through the gap, short circuit is caused, and normal operation of equipment is affected.

Disclosure of Invention

The invention mainly aims to provide a waterproof connector female head, which aims to solve the technical problem of poor waterproof performance of the existing connector.

In order to achieve the above object, the waterproof connector female provided by the present invention includes:

the socket body is provided with a first connecting cavity, and the first connecting cavity is provided with a mounting cavity opening and a male plug inserting cavity opening;

the first shielding main body is inserted into the socket main body and comprises an inserting section, and the inserting section is correspondingly inserted into the first connecting cavity through the mounting cavity opening; and

the first sealing piece is arranged between the inner wall surface of the first connecting cavity and the outer peripheral surface of the plug-in section and is used for sealing a gap between the inner wall surface of the mounting cavity opening and the plug-in section.

Optionally, the socket body is further provided with an inserting cavity, the mounting cavity opening is formed on one side, close to the inserting cavity, of the first connecting cavity, a limiting step is arranged on the connecting portion of the inserting cavity and the first connecting cavity in a protruding mode, the first sealing piece is sleeved on the outer peripheral surface of the inserting section, and the end face of the first sealing piece abuts against the end face, close to the first connecting cavity, of the limiting step.

Optionally, the first sealing element comprises a collar and an abutting annular edge arranged on one side of the collar, which is close to the plug cavity, the collar is sleeved on the outer circumferential surface of the plug section, and the abutting annular edge abuts against the end surface, close to the first connecting cavity, of the limiting step.

Optionally, a limiting part is arranged on the first shielding main body adjacent to the plugging section, and the limiting part is abutted to the limiting step, so that the plugging section is positioned in the first connecting cavity.

Optionally, a limiting part for limiting the axial movement of the first sealing part is arranged on the plugging section, one end of the first sealing part is abutted to the limiting step, and the other end of the first sealing part is abutted to the limiting part.

Optionally, the limiting piece includes spacing face and guide surface, the spacing face is used for limiting the axial motion of first sealing member, the guide surface is from the periphery of grafting section to spacing step slope setting.

Optionally, one or more waterproof ribs are arranged on the outer peripheral surface of the first sealing piece.

Optionally, the waterproof connector female head further comprises a clamping piece, the socket body is provided with a yielding groove for the clamping piece to penetrate through, the first shielding main body is provided with a clamping groove which is arranged at an included angle with the axis of the first shielding main body, and the clamping piece penetrates through the yielding groove and is clamped with the clamping groove.

Optionally, one end of the first shielding main body, which is far away from the plug-in section, is also provided with a connection section, the connection section is provided with a glue containing groove, and the glue containing groove is used for sealing and filling after the double-wall glued heat-shrinkable tube sleeved on the connection section is melted.

The invention also provides a waterproof connector, which comprises a waterproof connector female head and a waterproof connector male head; wherein,

the waterproof connector female head comprises a socket body, a first shielding main body and a first sealing piece, wherein the socket body is provided with a first connecting cavity, and the first connecting cavity is provided with a mounting cavity opening and a male head inserting cavity opening;

the first shielding main body is inserted into the socket main body, the first shielding main body comprises an insertion section, and the insertion section is correspondingly inserted into the first connecting cavity through the mounting cavity opening;

the first sealing piece is arranged between the inner wall surface of the first connecting cavity and the outer peripheral surface of the plug section and is used for sealing a gap between the inner wall surface of the mounting cavity opening and the plug section;

the male head of the waterproof connector comprises a plug body, a second shielding main body and a second sealing piece, the second shielding main body comprises a connecting section, the plug body is provided with a crimping end and a second connecting cavity penetrating through the crimping end, the connecting section is arranged in the second connecting cavity, and the plug body is inserted into the first connecting cavity from the male head inserting cavity opening;

the first shielding main body is spliced with the connecting section; the second sealing piece is arranged between the crimping end and the second shielding main body so as to seal one side, close to the crimping end, of the second connecting cavity.

According to the waterproof connector female head, the socket body is provided with the first connecting cavity, the plug-in section of the first shielding main body is correspondingly inserted into the first connecting cavity through the mounting cavity opening, and the gap between the inner wall surface of the mounting cavity opening and the plug-in section is plugged by the first sealing piece, so that external liquid cannot flow into the first connecting cavity through the mounting cavity opening, the plug-in section of the first shielding main body is protected from being influenced by the liquid, and the waterproof performance of the waterproof connector female head is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a female connector according to an embodiment of the present invention;

fig. 2 is an exploded view of the female of the waterproof connector of fig. 1;

FIG. 3 is a schematic cross-sectional view of the female of the waterproof connector of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural view of an embodiment of the waterproof connector of the present invention;

fig. 6 is an exploded view of the waterproof connector of fig. 5;

fig. 7 is a partial enlarged view at B in fig. 6.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a waterproof connector female head which is mainly suitable for connecting equipment for automobile signal transmission.

In the embodiment of the invention, as shown in fig. 1 to 3, the waterproof connector female 1 comprises a socket body 11 provided with a first connecting cavity 10, wherein the first connecting cavity 10 is provided with a mounting cavity opening 20 and a male plug-in cavity opening 60; the first shielding main body 12 is inserted into the socket body 11, the first connecting cavity 10 is provided with a cavity opening 20, the first shielding main body 12 comprises an inserting section 121, and the inserting section 121 is correspondingly inserted into the first connecting cavity 10 through the mounting cavity opening 20; and a first sealing member 13 disposed between the inner wall surface of the first connection cavity 10 and the outer peripheral surface of the plugging section 121, the first sealing member 13 being used for sealing the gap between the inner wall surface of the mounting cavity opening 20 and the plugging section 121.

In the present embodiment, it is understood that the socket body 11 has a terminal 112 for connecting signal lines on an automobile, and a male insertion end 111 for inserting a male connector of the connector to be mated with the waterproof connector female 1. Is provided at the male insertion end 111 so that the connector male can be inserted into the first connection chamber 10 through the male insertion chamber port 60. The mounting cavity opening 20 is used for mounting the plugging section 121 of the first shielding main body 12 into the first connection cavity 10. It can be understood that the plugging section 121 of the first shielding main body 12 is used for plugging with a shielding piece corresponding to the male connector, so as to realize signal transmission, and the first sealing piece 13 plugs a gap between the inner wall surface of the mounting cavity opening 20 and the plugging section 121, so that the waterproof performance in the first connecting cavity 10 can be ensured, the waterproof effect of the joint of the plugging section 121 and the male connector shielding piece in the first connecting cavity 10 is better, and the requirement on the waterproof performance of the connector under the conditions of rainy and snowy weather and the like is met.

The first shielding main body 12 may be inserted into the socket body 11 through a threaded connection, a clamping connection, a limiting abutment, or the like. It will be appreciated that when the plug section 121 is positioned in the first connecting cavity 10, there is a certain gap between the plug section 121 and the first connecting cavity 10 for the male connector to be inserted. The shape of the first connection cavity 10 is adapted to the shape of the housing of the male connector so that the male connector is easier to insert into the first connection cavity 10.

The first sealing member 13 may be disposed on the inner wall surface of the first connection cavity 10, the inner wall surface of the installation cavity port 20, or the outer wall surface of the plugging end, which is not limited herein, and may be only required to seal the gap between the inner wall surface of the installation cavity port 20 and the plugging section 121. The mounting cavity opening 20 may be circular, oval, square, etc., and only needs to be able to pass through the plugging section 121, so that the mounting cavity opening 20 is preferably circular for sealing. The first sealing member 13 may be a sealing ring or a sealant, and is not particularly limited herein, and may be a sealing member.

According to the waterproof connector female head 1, the socket body 11 is provided with the first connecting cavity 10, so that the plugging section 121 of the first shielding main body 12 is correspondingly plugged into the first connecting cavity 10 through the mounting cavity opening 20, and the gap between the inner wall surface of the mounting cavity opening 20 and the plugging section 121 is plugged by the first sealing piece 13, so that external liquid cannot flow into the first connecting cavity 10 through the mounting cavity opening 20, the plugging section 121 of the first shielding main body 12 is protected from being influenced by the liquid, and the waterproof performance of the waterproof connector female head 1 is better.

Further, a socket cavity 30 is arranged in the terminal 112, a mounting cavity opening 20 is formed on one side, close to the socket cavity 30, of the first connecting cavity 10, a limiting step 113 is arranged at a joint of the socket cavity 30 and the first connecting cavity 10 in a protruding mode, the first sealing piece 13 is sleeved on the outer peripheral surface of the socket section 121, and the end face of the first sealing piece 13 abuts against the end face, close to the first connecting cavity 10, of the limiting step 113.

In this embodiment, the plugging cavity 30 is used for plugging and installing the first shielding main body 12, so that the installation cavity opening 20 is formed on one side close to the plugging cavity 30, and when installing, the plugging section 121 is installed into the first connection cavity 10 through the installation cavity opening 20 from one end of the plugging cavity 30. It can be understood that the spacing step 113 makes the gap between the plugging section 121 and the inner wall surface of the first connection cavity 10 smaller, so that the end surface of the first sealing member 13 abuts against the end surface of the spacing step 113 close to the first connection cavity 10, and sealing of the installation cavity opening 20 can be achieved. So that the sealing is more convenient. Meanwhile, the first sealing member 13 is sleeved on the outer peripheral surface of the plugging section 121, so that the sealing between the first sealing member 13 and the plugging section 121 is ensured, and the sealing performance of one end of the first connecting cavity 10, which is close to the limiting step 113, is ensured. In an embodiment, the first shielding main body 12 further includes a limiting section disposed adjacent to the plugging section 121, the diameter of the limiting section is larger than that of the plugging section 121, and the limiting section is in limiting fit with the limiting boss, so that the first shielding main body 12 is limited in the socket body 11. During installation, the first shielding piece is inserted from the plug cavity 30, and is installed in place after the limiting section is in limiting abutting connection with the limiting step 113, at the moment, the first sealing piece 13 is sleeved on the plug section 121 from the first connecting cavity 10 until the end face of the first sealing piece 13 abuts against the end face of the limiting step 113, so that sealing installation of the whole waterproof connector female head 1 is realized.

Specifically, referring to fig. 4, the first sealing element 13 includes a collar 131 and an abutment flange 132 disposed on a side of the collar 131 near the plugging cavity 30, wherein the collar 131 is sleeved on the outer peripheral surface of the plugging section 121, and the abutment flange 132 abuts against the end surface of the limiting step 113 near the first connecting cavity 10.

In this embodiment, it can be understood that the first sealing member 13 has elasticity, and when the collar 131 is sleeved on the outer peripheral surface of the plug section 121, the collar 131 is in tight fit connection with the plug section 121, so as to realize sealing between the first sealing member 13 and the plug section 121. The abutting annular edge 132 enables the abutting area of the first sealing piece 13 and the end face of the limiting step 113 to be larger, so that the sealing area is larger, the stress area is larger, and the sealing effect is better.

Further, the plugging section 121 is provided with a limiting member 40 for limiting the axial movement of the first sealing member 13, one end of the first sealing member 13 abuts against the limiting step 113, and the other end abuts against the limiting member 40.

In this embodiment, by providing the limiting member 40 on the plugging section 121, the first sealing member 13 is limited between the limiting step 113 and the limiting member 40, so that the first sealing member 13 can be prevented from being pulled out by the dismounting force of the connector male when the plugging section 121 is dismounted from the shielding member of the connector male. The limiting member 40 may be a hook, a protrusion, a convex ring, or a slot, which is only required to implement the clamping and limiting of the first sealing member 13, and the shape of the limiting member 40 is not specifically limited herein.

Preferably, the stop 40 is a snap ring. It will be appreciated that the plug section 121 is typically made of a metallic material and the first seal 13 is typically made of an elastomeric material. The snap ring is arranged on the inserting section 121, so that the effect of limiting the axial movement of the first sealing element 13 is better, and the first sealing element 13 is less prone to being carried out and falling off.

Further, the limiting member 40 includes a limiting surface 401 and a guiding surface 402, the limiting surface 401 is used for limiting the axial movement of the first sealing member 13, and the guiding surface 402 is inclined from the outer circumferential surface of the plugging section 121 to the limiting step 113. In this embodiment, the limiting member 40 is provided with the guiding surface 402 inclined from the outer peripheral surface of the plugging section 121 to the limiting step 113, so as to provide a guiding function for the installation of the first sealing member 13, so that the installation of the first sealing member 13 is smoother. The limiting surface 401 limits the axial movement of the first sealing member 13, and the limiting surface 401 may be perpendicular to the outer circumferential surface of the socket section 121 or coincide with the inclined direction of the guide surface 402.

Further, referring to fig. 2 and 4, the outer peripheral surface of the first sealing member 13 is provided with one or more waterproof ribs 133. Waterproof protruding muscle 133 can provide multichannel waterproof for the water-proof effects is better, and waterproof protruding muscle 133 can extrusion deformation makes the surface of first sealing member 13 and the clearance between its complex surface littleer simultaneously, reaches effective waterproof.

In a preferred embodiment, the female connector 1 further includes a positioning member 14, the socket body 11 is provided with a yielding groove 114 for the positioning member 14 to pass through, the first shielding main body 12 is provided with a clamping groove 122 disposed at an angle with the axis of the first shielding main body 12, and the positioning member 14 passes through the yielding groove 114 and is clamped with the clamping groove 122.

In this embodiment, the positioning element 14 may be configured to have an open annular shape and include an annular opening, and when the positioning element 14 is inserted into the clamping groove 122 after passing through the relief groove 114, the opening is inserted into the clamping groove 122 to clamp the first shielding main body 12, so as to realize clamping positioning of the first shielding main body 12. The engaging groove 122 may be a groove formed in the first shielding body 12, or may be a groove formed between two oppositely disposed convex rings. The limiting connection between the first shielding main body 12 and the socket body 11 is more convenient through the clamping piece 14, so that the installation is simpler and faster, and the operation is convenient.

Further, a connection section 123 is further disposed at one end of the first shielding main body 12 away from the plug section 121, the connection section 123 is provided with a glue containing groove 50, and the glue containing groove 50 is used for sealing and filling after the double-wall glued heat shrinkable tube sleeved on the connection section 123 is melted.

In this embodiment, the glue receiving groove 50 may be a groove formed on the wire segment 123, or may be a groove formed between two oppositely disposed convex rings. The glue reservoir 50 may be one or more. Preferably, the number of the adhesive receiving grooves 50 is two, so that the double waterproof effect is achieved, and the connection between the double-wall adhesive heat shrink tube and the first shielding main body 12 is more stable. The wire segment 123 is used for connecting with a cable. It can be appreciated that the waterproof connector female head 1 may further comprise a shielding tube, during connection, the double-wall glued heat-shrinkable tube of the cable is firstly stripped off, the wire core is connected with the inner core of the inner cavity of the shielding main body, the braided layer is sleeved outside the shielding main body, the shielding tube is sleeved outside the braided layer by the shielding tube, the double-wall glued heat-shrinkable tube wraps the shielding tube, and then the double-wall glued heat-shrinkable tube is melted and then filled into the glue containing groove 50, so that the cable and the first shielding main body 12 are in sealing connection.

The present invention further provides a waterproof connector 100, referring to fig. 5 to 7, the waterproof connector 100 includes a male waterproof connector 2 and a female waterproof connector 1, the male waterproof connector 2 includes a plug body 21, a second shielding body 22 and a second sealing member 23, the second shielding body 22 includes a connection section 221, the plug body 21 has a press-connection end 211 and a second connection cavity 212 penetrating the press-connection end 211, the connection section 221 is disposed in the second connection cavity 212, and the plug body 21 is inserted into the first connection cavity 10 from the male connector insertion cavity 60111;

the first shielding main body 12 is spliced with the connecting section 221; the second seal 23 is provided between the crimping end 211 and the second shield main body 22 to seal the second connection cavity 212 away from the side near the crimping end 211.

The specific structure of the waterproof connector female 1 refers to the above embodiment, and since the waterproof connector 100 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

In the present embodiment, it is understood that the second connection cavity 212 is provided through the crimp end 211, and the second shield main body 22 can be inserted into the second connection cavity 212 through the end face of the crimp end 211. The second shield body 22 may be partially inserted into the second connection cavity 212 or may be entirely inserted into the second connection cavity 212. The second shield body 22 may be inserted into the second connection cavity 212 by means of a snap fit, a threaded connection, a crimp connection, or the like. When the second shield body 22 is inserted into the second connection cavity 212, a certain gap is provided between the second shield body 22 and the second connection cavity 212 to provide a mounting space for the shield of the female connector fitting with the male connector to be connected with the first shield body 12.

The second sealing member 23 may be disposed on the plugging end or the second shielding main body 22, or may be simultaneously embedded on the plugging end and the second shielding main body 22, which is not limited herein, and may be only required to seal a gap between an inner wall surface of the second connection cavity 212 of the crimp end 211 and the second shielding main body 22, that is, seal a side of the second connection cavity 212 close to the crimp end 211. The second sealing member 23 may be a sealing ring or a sealant, and is not particularly limited herein, and may be a sealing member.

The shape of the plug body 21 is adapted to the shape of the first connection chamber 10. When in installation, the plug body 21 is inserted into the first connecting cavity 10 from the male plug insertion cavity opening 60, so that the inserting section 121 of the first shielding main body 12 is inserted into the connecting section 221 of the second shielding main body 22, and the inserting section 121 and the connecting section 221 are positioned in the second connecting cavity 212. After the male connector 2 and the female connector 1 are assembled, the first sealing member 13 seals one side of the second connecting cavity 212 away from the crimping end 211, the second sealing member 23 seals one side of the second connecting cavity 212 close to the crimping end 211, and the first sealing member 13 and the second sealing member 23 simultaneously seal two ends of the second connecting cavity 212, so that liquid cannot enter the second connecting cavity 212 to affect the connection position of the plugging section 121 and the connecting section 221, and the waterproof effect of the whole waterproof connector 100 is better.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (3)

1. A female connector for a waterproof connector, comprising:

the socket body is provided with a first connecting cavity, and the first connecting cavity is provided with a mounting cavity opening and a male plug inserting cavity opening;

the first shielding main body is inserted into the socket main body and comprises an inserting section, and the inserting section is correspondingly inserted into the first connecting cavity through the mounting cavity opening; and

the first sealing piece is arranged between the inner wall surface of the first connecting cavity and the outer peripheral surface of the plug section and is used for sealing a gap between the inner wall surface of the mounting cavity opening and the plug section; the socket body is further provided with an inserting cavity, the mounting cavity opening is formed in one side, close to the inserting cavity, of the first connecting cavity, a limiting step is arranged at the joint of the inserting cavity and the first connecting cavity in a protruding mode, the first sealing piece is sleeved on the outer peripheral surface of the inserting section, and the end face of the first sealing piece abuts against the end face, close to the first connecting cavity, of the limiting step; the first sealing element comprises a lantern ring and an abutting annular edge arranged on one side of the lantern ring, which is close to the plug-in cavity, the lantern ring is sleeved on the outer peripheral surface of the plug-in section, the abutting annular edge abuts against the end surface of the limit step, which is close to the first connecting cavity, the cross section area of the abutting annular edge is larger than that of the lantern ring, the abutting annular edge enables the abutting area of the first sealing element and the end surface of the limit step to be larger, so that the sealing area is larger, the stress area is larger, and the sealing effect is better; the plug-in section is provided with a limiting piece for limiting the axial movement of the first sealing piece, one end of the first sealing piece is abutted with the limiting step, and the other end of the first sealing piece is abutted with the limiting piece; the limiting piece comprises a limiting surface and a guiding surface, the limiting surface is used for limiting the axial movement of the first sealing piece, and the guiding surface is obliquely arranged from the periphery of the inserting section to the limiting step; one or more waterproof convex ribs are arranged on the outer peripheral surface of the first sealing piece; the waterproof connector female head further comprises a clamping piece, the socket body is provided with a yielding groove for the clamping piece to penetrate through, the first shielding main body is provided with a clamping groove which is arranged at an included angle with the axis of the first shielding main body, the clamping piece penetrates through the yielding groove to be clamped with the clamping groove, the clamping piece comprises an annular opening, and after the clamping piece penetrates through the yielding groove, the opening of the clamping piece is inserted into the clamping groove to buckle the first shielding main body, so that clamping and positioning of the first shielding main body are realized; the first shielding main body is far away from the one end of grafting section still is equipped with the wiring section, the wiring section is equipped with holds gluey groove, hold gluey groove and be used for supplying the cover to establish double-walled area gluey pyrocondensation pipe on the wiring section seals the packing after melting.

2. The female connector of claim 1, wherein the retainer is a snap ring.

3. A waterproof connector comprising the female waterproof connector of any one of claims 1-2, and a male waterproof connector;

the male head of the waterproof connector comprises a plug body, a second shielding main body and a second sealing piece, the second shielding main body comprises a connecting section, the plug body is provided with a crimping end and a second connecting cavity penetrating through the crimping end, the connecting section is arranged in the second connecting cavity, and the plug body is inserted into the first connecting cavity from the male head inserting cavity opening;

the first shielding main body is spliced with the connecting section; the second sealing piece is arranged between the crimping end and the second shielding main body so as to seal one side, close to the crimping end, of the second connecting cavity.