Waterproof structure for wire harness connector and wire harness connector

Abstract

The utility model discloses a waterproof structure for a wire harness connector and the wire harness connector, and belongs to the technical field of connectors. The wire harness connector comprises a connector body, the connector body is provided with a head part and a tail end, the head part is provided with a contact pin or a socket, the tail end is provided with a wire insertion hole, and the wire insertion hole is used for receiving a wire harness to be inserted into the connector body and electrically communicated with the contact pin or the socket of the head part; the waterproof structure comprises an outer sleeve and a waterproof medium, one end of the outer sleeve can be installed at the tail end of the connector body, and the other end of the outer sleeve extends in the direction away from the connector body. After the wire harness is inserted into the wire plugging hole, the waterproof medium is filled in the outer sleeve and is used for plugging the wire plugging hole. According to the wire harness connector, external liquid can be prevented from permeating into the connector through a gap reserved between the wire plugging hole in the tail end and the wire harness, corrosion damage to a metal terminal in the connector is avoided, and then the waterproof protection function is achieved on the connector.

Description

Technical Field

[0001] The utility model belongs to the technical field of connectors, and in particular relates to a waterproof structure applied to a wire harness connector. Background Art

[0002] A wiring harness connector is a type of terminal, also known as a wiring harness connector, and is typically composed of a plug and a socket. Currently, wiring harnesses are often connected to one another, or to electrical components, using this type of connector to simplify the connection and removal of wiring harnesses.

[0003] During actual use, especially in outdoor environments, wire harness connectors are often exposed to liquids such as rain and dew. Liquids that accumulate on the connector can sometimes enter the connector through the wire insertion hole (the through-hole for inserting the wire harness) at the rear end of the connector, corroding the metal terminals inside the connector, causing damage to the metal terminals or safety accidents such as short circuits.

[0004] To prevent external liquids from entering the connector through the wire insertion hole at the rear end, existing solutions focus on the connector's internal structure, adding waterproof seals to prevent liquid infiltration. However, this approach cannot be applied to existing connectors, and replacing these waterproof connectors in use on-site would undoubtedly increase the workload and affect the normal operation of the field. Summary of the Invention

[0005] In response to the above-mentioned problems existing in the prior art, the utility model proposes a waterproof structure that can be used for a wiring harness connector and a wiring harness connector having the waterproof structure, which can achieve a waterproof protection function on the connector without changing the existing structure of the connector.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention proposes a waterproof structure for a wiring harness connector, wherein the wiring harness connector includes a connector body, the connector body having a head and a tail end, a pin or a socket being provided at the head, and a wire insertion hole being provided at the tail end, the wire insertion hole being used to receive a wiring harness inserted into the interior of the connector body and electrically connected to the pin or the socket; the waterproof structure includes an outer sleeve and a waterproof medium; wherein one end of the outer sleeve is installed at the tail end of the connector body, and the other end extends in a direction away from the connector body; the waterproof medium is filled in the outer sleeve after the wiring harness is inserted into the wire insertion hole to seal the wire insertion hole.

[0008] In some embodiments of the present application, in order to prevent the waterproof medium from entering the connector body through the wire insertion hole, a blocking piece with an adjustable opening can be installed in the wire insertion hole. On the one hand, it is used to cover the wire insertion hole where the wiring harness is not inserted. On the other hand, after the wiring harness is inserted into the wire insertion hole, it can cover the gap left between the wire insertion hole and the wiring harness.

[0009] In some embodiments of the present application, the baffle can be designed as a flexible baffle, which is generally circular and mounted on the inner side of the wire insertion hole and coaxial with the wire insertion hole. The flexible baffle is configured to be composed of multiple baffle petals, each of which gradually widens from the center of the circle toward the circumference. When the wiring harness is inserted into the wire insertion hole, the multiple baffle petals can be turned inward from the center of the circle to form an opening that matches the thickness of the wiring harness for insertion. Because the baffle petals can fit against the outside of the wiring harness, blocking the gap between the wiring harness and the wire insertion hole, the sealing effect against waterproof media can be improved.

[0010] In some embodiments of the present application, the outer sleeve may be a heat shrink tube, which is fixed to the rear end of the connector body by heating and shrinking to simplify the installation operation.

[0011] In some embodiments of the present application, an outermost end portion and a neck portion located inside the end portion can be provided at the tail end of the connector body, and the neck portion can be configured to be retracted inward relative to the end portion to form a stepped surface; one end of the heat shrink tube is heated so that the heat shrink tube is shrunken to the outside of the end portion and the neck portion, thereby utilizing the stepped surface to act as a stopper for the heat shrink tube, thereby preventing the heat shrink tube from detaching from the tail end of the connector body when subjected to outward pulling force, thereby improving the stability of the heat shrink tube installed on the connector body.

[0012] In some embodiments of the present application, the waterproof medium can be selected as a solidifiable liquid medium, which is injected into the inner cavity of the outer sleeve in liquid state. After solidification, it completely fits the inner wall of the outer sleeve and the wiring harness inserted into the wire insertion hole, thereby completely eliminating the possibility of external liquid leaking from the tail end of the connector body to the interior of the connector body.

[0013] In another aspect, the present invention further provides a wiring harness connector, comprising:

[0014] The connector body has a head and a tail, wherein a pin or a socket is provided on the head, and a wire insertion hole is provided on the tail; the wire insertion hole is used to receive a wire harness inserted into the interior of the connector body and electrically connect with the pin or the socket;

[0015] an outer sleeve, one end of which is mounted on the rear end of the connector body and the other end of which extends away from the connector body;

[0016] A waterproof medium is filled in the outer sleeve to seal the wire insertion hole after the wire harness is inserted into the wire insertion hole.

[0017] In some embodiments of the present application, in order to completely prevent the waterproof medium from penetrating into the interior of the connector body through the wire insertion hole, a baffle with an adjustable opening can be installed in the wire insertion hole to cover the wire insertion hole where the wiring harness is not inserted and to cover the gap between the wire insertion hole and the wiring harness after the wiring harness is inserted into the wire insertion hole.

[0018] In some embodiments of the present application, the outer sleeve may be a heat shrink tube, which is fixed to the tail end of the connector body by heat shrinkage to simplify the installation operation and improve the adaptability of the outer sleeve to various wiring harness connectors.

[0019] In some embodiments of the present application, in order to prevent the heat shrink tube from detaching from the connector body, an outermost end portion and a neck portion located inside the end portion can be provided at the tail end of the connector body, and the neck portion is configured to be retracted relative to the end portion to form a stepped surface; one end of the heat shrink tube is shrunk around the outer side of the end portion and the neck portion, and the stepped surface is used as a stopper to prevent detachment.

[0020] In some embodiments of the present application, the waterproof medium can be a solidifiable liquid medium, which is injected into the inner cavity of the heat shrink tube in liquid state. After solidification, it completely fits the inner wall of the heat shrink tube and the wiring harness inserted into the wire plug hole, leaving no gaps for the infiltration of external liquids.

[0021] In some embodiments of the present application, the waterproof medium may be a medium such as silica gel, resin, waterproof gel, etc., which is initially liquid, solidifies under certain conditions, and has waterproof properties after solidification.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are mainly reflected in:

[0023] 1. The utility model installs an outer sleeve at the tail end of the wiring harness connector and fills the outer sleeve with a waterproof medium. The tail end is sealed with the waterproof medium, thereby preventing external liquid from penetrating into the interior of the connector through the gap left between the wire insertion hole on the tail end and the wiring harness, causing corrosion damage to the metal terminals inside the connector, thereby achieving a waterproof protection function on the connector.

[0024] 2. The utility model adopts a waterproof structure designed on the outside of the wiring harness connector body, which will not affect the inherent structure of the existing connector and is easy to implement. Moreover, the wiring harness connector currently in use on site can be directly modified without replacement, which requires little work and can quickly solve the problem without affecting the normal progress of on-site operations.

[0025] 3. The waterproof structure designed for the wiring harness connector of the present invention is easy to select materials and has low cost. It can be applied to various types of existing wiring harness connectors and has a wide range of applications.

[0026] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without inventive work.

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the wiring harness connector proposed by the present utility model;

[0029] Figure 2 yes Figure 1 A structural diagram of an embodiment of a wiring harness connector body;

[0030] Figure 3 yes Figure 2 A schematic structural diagram of an embodiment of a head portion of a wiring harness connector body is shown;

[0031] Figure 4 is Figure 2 A schematic structural diagram of an embodiment of the wiring harness connector body after a wiring harness is inserted;

[0032] Figure 5 yes Figure 2 A front view of the wiring harness connector body is shown;

[0033] Figure 6 It is a structural schematic diagram of an embodiment of a baffle with an adjustable opening;

[0034] Figure 7 It is a structural schematic diagram of another embodiment of a baffle with an adjustable opening;

[0035] Figure 8 yes Figure 7 Schematic diagram of the exploded structure of the baffle shown;

[0036] Figure 9 yes Figure 7 A schematic structural diagram of an embodiment of a blocking piece forming a middle opening;

[0037] Figure 10 The socket is installed with Figure 6 An orthographic view of the rear end of the harness connector body with the baffle shown;

[0038] Figure 11 is Figure 10Schematic diagram of the baffle avoidance on the wiring harness connector body after the wiring harness is inserted.

[0039] In the figure, 100 is the connector body; 110 is the head; 111 is the pin; 120 is the tail end; 121 is the end face; 122 is the wire insertion hole; 123 is the gap; 124 is the end; 125 is the neck; 126 is the stepped surface; 140 is the flexible baffle; 141 is the baffle; 151 is the upper baffle; 152 is the lower baffle; 153 is the upper strip opening; 154 is the lower strip opening; 155 is the middle through hole; 160 is the lock; 200 is the outer sleeve; 210 is the top opening; 300 is the waterproof medium; 400 is the wiring harness. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", "head", "tail", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or internal connections within components. Those skilled in the art can understand the specific meanings of the above terms in this utility model based on specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0043] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0044] Existing wiring harness connectors usually include a male head and a female head, which are plugged together to achieve connectivity between wiring harnesses or between wiring harnesses and electrical components.

[0045] This embodiment designs a waterproof structure for connectors that need to connect wire harnesses, which can be applied to both male and female connectors. Figure 1 As shown, it mainly includes components such as a connector body 100, an outer sleeve 200, and a waterproof medium 300.

[0046] Among them, such as Figure 2 As shown, the connector body 100 comprises a head 110, a tail end 120 and a middle portion 130. The interior of the middle portion 130 may form a hollow cavity for arranging required structural parts or installing applicable components.

[0047] The tail end 120 is the end of the connector body 100 for connecting to a wire harness. One or more wire insertion holes 122 are provided on the end surface 121 for inserting the wire harness into the interior of the connector body 100 .

[0048] The head 110 is the end of the connector body 100 for plugging into another connector. Figure 3 As shown, the head 110 may be provided with one or more pins 111, which are plugged into the socket of another female connector through the pins 1111. For a female connector, the head 110 may be provided with one or more sockets, which are plugged into the pins of another male connector through the sockets.

[0049] In some embodiments, the wire insertion hole 122 on the tail end 120 can be designed as a through hole, so that the external wiring harness can directly extend into the internal cavity of the connector body 100 through the wire insertion hole 122, and be electrically connected to the pin 111 or socket on the head 110 through the connector in the internal cavity.

[0050] Of course, the wiring harness can also be configured to enter the interior of the connector body 100 through the wire insertion hole 122 of the rear end 120 of the connector body, and then directly extend to the head 110 of the connector body to be electrically connected to the pins 111 or socket arranged on the head 110. This embodiment does not limit the specific electrical connection method between the wiring harness and the pins 111 or socket.

[0051] Considering that the wire harness has different thicknesses, in order to make the wire harness connector adaptable to wire harnesses of different thicknesses, the wire insertion hole 122 of the wire harness connector is usually designed to be relatively large, such as Figure 4As shown, in order to accommodate the insertion of wire harnesses 400 of different thicknesses, after the wire harness 400 is inserted into the wire insertion hole 122, a gap 123 will be left around the wire harness 400 and the wire insertion hole 122. External liquid (rainwater, dew, snow water, etc.) will enter the interior of the connector body 100 through the gap 123, causing corrosion damage to the metal components inside the connector body 100 or the pins 111 or sockets provided on the head 110, thereby affecting the connection performance of the metal components, and in severe cases, may cause a short circuit accident.

[0052] In order to provide waterproof protection for the wiring harness connector, such as Figure 1 As shown, in this embodiment, an outer sleeve 200 is installed at the tail end 120 of the connector body 100, and a waterproof medium 300 is filled in the outer sleeve 200. The waterproof medium 300 is used to seal the tail end 120 to prevent external liquid from penetrating into the interior of the body through the gap connecting the tail end 120 to the inner cavity of the body, thereby achieving a waterproof protection effect.

[0053] To maintain the inherent structure of the connector body 100, this embodiment places an outer sleeve 200 outside the connector body 100. One end is attached to the rear end 120 of the connector body 100, and the other end extends away from the connector body 100, forming a cylindrical shape with an open top. The entire end surface 121 of the rear end 120 forms the bottom of the cylinder. After the wiring harness 400 is inserted into the wire insertion hole 122, a waterproof medium is filled from the top opening 210 of the outer sleeve 200 to seal the wire insertion hole 122.

[0054] In some embodiments, the outer sleeve 200 can be a heat shrink tube, which is sleeved on the outside of the tail end 120 of the connector body. The heat shrink tube is shrunk by heating to be tightly clamped on the connector body 100.

[0055] In order to prevent the heat shrink tube from being separated from the connector body 100 when it is pulled outward (away from the connector body 100), a stop surface is designed at the tail end 120 of the connector body in this embodiment. Figure 5 As shown, for example, the tail end 120 of the connector body can be designed to include an outermost end 124 and a neck 125 located inside the end 124, with the neck 125 being configured to be retracted relative to the end 124 to form a stepped surface 126. One end of a heat shrink tubing is sleeved over the outer sides of the end 124 and neck 125 of the tail end, and the heat shrink tubing is heated to shrink and tightly wrap around the outer sides of the end 124 and neck 125. In this way, the stepped surface 126 acts as a stopper to prevent the heat shrink tubing from being separated from the connector body 100 under the action of external forces.

[0056] In some embodiments, the end portion 124 of the tail end 120 may be designed to be a truncated cone with a narrow top and a wide bottom, and the neck portion 125 may be designed to be cylindrical, so as to facilitate fitting of the heat shrink tube on the outside thereof.

[0057] The waterproof medium 300 filled in the outer sleeve 200 can be a liquid medium that is initially liquid, solidifies under certain conditions, and becomes waterproof after solidification, such as silicone, resin, waterproof gel, etc. Filling the outer sleeve 200 with a liquid medium ensures that the liquid medium seamlessly adheres to the entire inner wall of the outer sleeve 200 and the entire end surface 121 of the rear end 120 of the connector body, leaving no gaps for the infiltration of external liquids, and achieving a waterproof effect superior to other types of media.

[0058] The outer sleeve 200 can guide the amount of liquid medium to be filled. The outer sleeve 200 can be filled to the full, or only to about half the height of the outer sleeve 200. As long as the entire end face 121 of the tail end 120 of the connector body can be completely sealed, the waterproof effect can be guaranteed.

[0059] Different liquid curable waterproofing media have different curing processes. For example, silicone can be cured at room temperature or under heating; resin can be solidified from liquid by adding a curing agent or using light; and waterproof gel can cure on its own at room temperature. After the liquid medium is injected into the outer sleeve 200, the curing process can be carried out according to the curing conditions of the selected liquid medium.

[0060] In order to prevent the liquid medium from entering the interior of the connector body 100 through the gap 123 between the wiring harness and the wire insertion hole 122, and affecting the connection between the structural parts or components inside the body, this embodiment preferably designs a baffle with an adjustable opening to be installed in the wire insertion hole 122 at the rear end 120 of the connector to block the gap 123 between the wiring harness and the wire insertion hole 122.

[0061] In some embodiments, as Figure 6 As shown, the baffle can be designed as a flexible baffle 140, that is, a baffle made of a flexible material. The baffle 140 can be designed to be circular in shape and divided into multiple petals from the center toward the circumference, each petal forming a flexible baffle 141. Each baffle 141 gradually widens from the center toward the circumference, and all baffles 141 are assembled together to form a circle, forming the flexible baffle 140.

[0062] The flexible baffle 140 can be installed on the inner side of the wire insertion hole 122 and coaxial with the wire insertion hole 122, as shown in FIG. Figure 10As shown, when the wire harness 400 is inserted into the wire insertion hole 122, the wire harness 400 presses down the flaps 141 from the center of the flexible baffle 140, so that all the flaps 141 are turned inward from the center, forming an opening that matches the thickness of the wire harness 400 for the wire harness to be inserted. Figure 11 As shown, since the flap 141 is soft and elastic, it can fit with the outer surface of the wiring harness 400, blocking the gap 123 between the wiring harness 400 and the wire insertion hole 122, thereby preventing the liquid waterproof medium 300 from entering the interior of the connector body 100 through the gap 123.

[0063] The flexible blocking piece 140 installed in the wire insertion hole 122 can also block the wire insertion hole 122 when no wire harness 400 is inserted into the wire insertion hole 122 to prevent foreign matter from entering the interior of the connector body 100 .

[0064] In some other embodiments, such as Figure 7 、 Figure 8 As shown, the blocking piece can also be composed of two splittable hard blocking pieces 151 and 152 stacked up and down, which can also achieve the purpose of adjusting the size of the blocking piece opening.

[0065] Specifically, two circular baffles that can be split can be selected, such as Figure 8 Each of the circular upper and lower baffles 151, 152 is composed of two semicircular sub-baffles. Under normal conditions, the diametrical edges of the two semicircular sub-baffles butt together, providing a complete seal. When subjected to a downward external force at the center of the circle, the two sub-baffles move in opposite directions, forming a strip-shaped opening whose width matches the width of the insert.

[0066] The two circular baffles 151 and 152 that can be opened are stacked up and fitted together, and the opening directions of the upper baffle 151 and the lower baffle 152 are adjusted to be perpendicular to each other, as shown in FIG. Figure 7 As shown. The two overlapping circular baffles 151 and 152 are installed on the inner side of the wire insertion hole 122 and are coaxial with the wire insertion hole 122. When the wire harness 400 is inserted into the wire insertion hole 122, the upper and lower baffles 151 and 152 are opened under the action of the downward pressure, forming two orthogonal strip openings, namely the upper strip opening 153 and the lower strip opening 154, as shown. Figure 9 Because the two semicircular sub-blocks of the lower block 152 partially block the upper strip opening 153 formed by the upper block 151, only a square through hole 155 is formed at the center of the circle for the wire harness 400 to pass through, and the width of the square through hole 155 is adapted to the thickness of the wire harness 400, thereby also achieving the effect of blocking the gap 123 between the wire harness 400 and the wire insertion hole 122.

[0067] No matter which type of baffle with adjustable opening is installed in the wire insertion hole 122, a tiny gap will inevitably be formed between the opening of the baffle and the outer surface of the wiring harness 400. However, considering that the molecular volume of the liquid waterproof medium is relatively large, it is difficult for it to pass through the tiny gap, so an ideal sealing effect can be achieved.

[0068] Of course, the baffle with adjustable opening may also be implemented using other structures, and this embodiment is not limited to the above examples.

[0069] In order to improve the firmness of the wiring harness connector after being connected to another connector adapted thereto, lock buckles 160 that can be matched and locked can be provided on the two connectors, such as Figure 2 After the two connectors are plugged into place, locking the lock 160 can ensure that the two connectors will not be disengaged during use, thereby ensuring the reliability of the line connection.

[0070] Industrial Applicability

[0071] When modifying the structure of an existing wiring harness connector to provide waterproof protection, an outer sleeve 200 can be installed on the tail end 120 of the connector body. If a heat shrink tubing is used as the outer sleeve 200, one end of the heat shrink tubing can be placed over the outside of the connector tail end 120, ensuring that the entire end surface 121 of the tail end 120 is inserted into the inner cavity of the heat shrink tubing. The heat shrink tubing is then heated and placed over one end of the tail end 120, causing it to shrink and tighten around the outer wall of the tail end 120, completing the connection between the heat shrink tubing and the connector body 100.

[0072] The wire harness 400 is extended into the inner cavity of the outer sleeve 200 and inserted into the wire insertion hole 122 opened on the tail end 120, and the connection between the wire harness 400 and the connector body 100 is completed using the existing wiring method.

[0073] Then, the liquid waterproof medium 300 is injected into the inner cavity of the outer sleeve 200 . The liquid waterproof medium 300 can be filled to the full height or half the height of the inner cavity of the outer sleeve 200 , as long as the end surface 121 of the connector tail end 120 is completely covered.

[0074] According to the curing method of the waterproof medium 300, the waterproof medium 300 is cured, such as Figure 1 As shown, the waterproof modification of the wiring harness connector is completed.

[0075] Plug the modified harness connector into another compatible connector, lock the lock 160, and restore the on-site line.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A waterproof structure for a wiring harness connector, the wiring harness connector comprising: The connector body has a head and a tail, wherein a pin or a socket is provided on the head, and a wire insertion hole is provided on the tail, wherein the wire insertion hole is used to receive a wire harness inserted into the interior of the connector body and electrically communicate with the pin or the socket; Characterized in that, the waterproof structure includes: an outer sleeve, one end of which is mounted on the rear end of the connector body and the other end of which extends away from the connector body; A waterproof medium is filled in the outer sleeve to seal the wire insertion hole after the wire harness is inserted into the wire insertion hole.

2. The waterproof structure for a wiring harness connector according to claim 1, characterized in that: Also includes: A blocking piece with an adjustable opening is installed on the wire insertion hole and is used to block the wire insertion hole when the wire harness is not inserted and to block the gap between the wire insertion hole and the wire harness after the wire harness is inserted into the wire insertion hole.

3. The waterproof structure for a wiring harness connector according to claim 2, characterized in that: The blocking piece is a flexible blocking piece, which is circular in shape as a whole and is installed on the inner side of the wire insertion hole and is coaxial with the wire insertion hole; The flexible baffle is composed of multiple baffle petals, each of which gradually widens from the center to the circumference. When the wiring harness is inserted into the wire insertion hole, the multiple baffle petals turn inward from the center position to form an opening that matches the thickness of the wiring harness for the wiring harness to be inserted.

4. The waterproof structure for a wiring harness connector according to any one of claims 1 to 3, characterized in that: The outer sleeve is a heat shrink tube, which is fixed to the tail end of the connector body by heating and shrinking.

5. The waterproof structure for a wiring harness connector according to claim 4, characterized in that: The tail end of the connector body includes an end portion located at the outermost side and a neck portion located inside the end portion, wherein the neck portion is retracted relative to the end portion to form a stepped surface; One end of the heat shrink tube is shrunk onto the outer side of the end portion and the neck portion and passes through the step surface stopper.

6. The waterproof structure for a wiring harness connector according to any one of claims 1 to 3, characterized in that: The waterproof medium is a solidifiable liquid medium, which is injected into the inner cavity of the outer sleeve in liquid state and completely fits the inner wall of the outer sleeve and the wire harness inserted into the wire insertion hole after solidification.

7. A wiring harness connector, characterized in that: include: The connector body has a head and a tail, wherein a pin or a socket is provided on the head, and a wire insertion hole is provided on the tail, wherein the wire insertion hole is used to receive a wire harness inserted into the interior of the connector body and electrically communicate with the pin or the socket; an outer sleeve, one end of which is mounted on the rear end of the connector body and the other end of which extends away from the connector body; A waterproof medium is filled in the outer sleeve to seal the wire insertion hole after the wire harness is inserted into the wire insertion hole.

8. The wiring harness connector according to claim 7, wherein: Also includes: A blocking piece with an adjustable opening is installed on the wire insertion hole and is used to block the wire insertion hole when the wire harness is not inserted and to block the gap between the wire insertion hole and the wire harness after the wire harness is inserted into the wire insertion hole.

9. The wiring harness connector according to claim 7 or 8, characterized in that: The outer sleeve is a heat shrink tube, which is fixed to the tail end of the connector body by heating and shrinking; The waterproof medium is a solidifiable liquid medium, which is injected into the inner cavity of the heat shrink tube in liquid state and completely adheres to the inner wall of the heat shrink tube and the wire harness inserted into the wire insertion hole after solidification.

10. The wiring harness connector according to claim 9, wherein: The tail end of the connector body includes an end portion located at the outermost side and a neck portion located inside the end portion, wherein the neck portion is retracted relative to the end portion to form a stepped surface; One end of the heat shrinkable tube is shrunk around the outside of the end portion and the neck portion and passes through the stepped surface stopper; The waterproof medium is silica gel, resin or waterproof gel.

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