CN101499585B - Waterproof connector and manufacturing method thereof - Google Patents

Abstract

The invention relates to a waterproof connector and a manufacturing method thereof, wherein the waterproof connector comprises a conductive terminal, an insulating seat body, an electric wire, a hollow cylinder and a coating body, wherein the insulating seat body is used for the conductive terminal to penetrate and fix and is provided with a bearing section, the electric wire is provided with two or more core wires, each core wire is respectively connected with one end of each conductive terminal, the hollow cylinder is connected with the bearing section and is positioned at one side of the electric wire, and the coating body coats one end of the bearing section, the hollow cylinder, the core wires and the conductive terminal; in addition, the invention also provides a manufacturing method for manufacturing the waterproof connector. Thus, the product manufacturing qualification rate can be improved and the effect of preventing the infiltration of water vapor can be achieved.

Description

Waterproof connector and manufacturing method thereof

technical field

The invention relates to a connector, in particular to a waterproof connector and a manufacturing method thereof.

Background technique

Existing connectors have gradually been widely and widely used in outdoor places, so the demand for waterproof effect of connectors is also increasing. Most of the connectors use metal materials with excellent conductivity for electrical signal transmission, and The metal material is highly susceptible to moisture and the transmission function is damaged, or even loses its function. Although there have been product structures specially designed for moisture-proof connectors on the market, the waterproof effect is still not ideal.

As shown in Figure 1, it is a schematic diagram of the action of injecting a plastic covering body into a known waterproof connector. The structure of a general connector includes two or more conductive terminals 10a, an insulating seat body 20a, an electric wire 30a, and a covering body 40a. The right side of the seat body 20a is formed with a receiving section 21a and an accommodating groove 22a, and it is used for each conductive terminal 10a to pass through and fix. One end of each conductive terminal 10a protrudes from the outside of the receiving section 21a. The electric wire 30a has two or two More than one core wire, each core wire is respectively connected to each conductive terminal 10a, and the covering body 40a covers each conductive terminal 10a, insulating base body 20a and part of the electric wire 30a. However, this structure has the following problems: since the covering body 40a covers each conductive terminal 10a and the electric wire 30a by injection molding, the plastic of the covering body 40a is easy to hit each conductive terminal 10a and the electric wire 30a when it is injected. The connection of the electric wire 30a will cause poor contact or breakage of the weld, resulting in a reduction in the production yield. In addition, since the insulating seat body 20a is a hard material, and the covering body 40a is a soft material, the two materials are closely attached to each other. The material will slowly form gaps and peel off, allowing moisture to seep in, dampening the conductive terminals and reducing their efficacy.

In response to the aforementioned problems, the industry has successively developed another connector structure. As shown in FIG. 2 , one end of the insulating base body 20b of the connector extends out of a receiving section 21b, and an accommodating groove 22b is formed inside the receiving section 21b. Each conductive terminal 10b and the electric wire 30b are welded inside the accommodating groove 22b, and the function of the receiving section 21b is to protect each conductive terminal 10b and the electric wire 30b. When the connector is injection molded with the covering body 40b, The plastic of the covering body 40b will not directly hit its welding place, and cause the conductive terminal 10b and the electric wire 30b to be damaged; It is placed inside the groove 22b, so that when the conductive terminals 10b and the wires 30b are to be welded in the manufacturing process, the welding is difficult due to the narrow working space, which further reduces the qualified rate. In addition, if the pass rate of welding manufacturing process is to be improved, the length of each conductive terminal 10b must be lengthened so that each conductive terminal 10b protrudes from the receiving section 21b, but too long conductive terminals 10b are easily bent and broken.

Therefore, how to improve the production pass rate of the connector, how to make the connector waterproof, and how to improve the overall structural strength of the connector have become the subject of the present invention.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a waterproof connector and its manufacturing method, which can effectively solve the problem of peeling off of the two materials due to the large difference in physical properties that cannot be reliably combined, and effectively improve its waterproofness and finished product. Pass rate, long service life.

In order to achieve the above object, the present invention provides a waterproof connector, which includes two or more conductive terminals, an insulating base, a wire, a hollow cylinder and a covering body, wherein the insulating base is used for the conductive terminals to pass through fixed, and the insulating seat body has a receiving section, the electric wire has two or more core wires, and the core wires are respectively connected to one end of the conductive terminal, and the hollow cylinder is connected to the receiving section and is located at the On one side of the electric wire, the covering body covers the receiving section, the hollow cylinder, the core wire and one end of the conductive terminal.

In order to achieve the above object, the present invention also provides a waterproof connector manufacturing method, the steps of which include:

a) Connect two or more conductive terminals to the interior of the insulating base;

b) connecting each core wire of the electric wire to one end of the conductive terminal;

c) connecting the hollow cylinder to one end of the insulating base, and covering the connection between the conductive terminal and the core wire;

d) providing a mold into which the semi-finished product formed in steps a to c is placed; and

e) injecting the molten covering body into the mold, covering the hollow cylinder and the core wire and partially covering the insulating base, the conductive terminal and the electric wire.

It can be seen from the above technical solution that the present invention connects the corresponding receiving section with the help of the hollow cylinder, and uses the covering body to cover the receiving section and the hollow cylinder, which can effectively solve the problem that the two materials cannot be reliably combined due to the large difference in physical properties. The problem of peeling off, at the same time, because the hollow cylinder corresponds to the connecting section and covers the connection between the conductive terminal and the core wire, the plastic will not directly hit the connection during injection molding, thereby improving the qualified rate of the finished product, and because the hollow cylinder The body and the covering body are made of the same material, so that the present invention has no problem of combining different materials.

Description of drawings

Fig. 1 is a schematic diagram of the action of injecting a plastic covering into a known waterproof connector;

2 is a schematic cross-sectional view of another known waterproof connector;

Fig. 3 is the production flowchart of waterproof connector of the present invention;

4 is a schematic cross-sectional view of a conductive terminal connected to an electric wire in the present invention;

Fig. 5 is a schematic cross-sectional view of the hollow cylinder of the present invention when it is connected to the insulating base;

Fig. 6 is a schematic cross-sectional view of the semi-finished product in the present invention when it is placed into a mold and poured;

Figure 7 is a schematic cross-sectional view of the connector in the present invention;

Fig. 8 is a perspective view of a hollow cylinder in the present invention;

9 is a schematic cross-sectional view of a waterproof connector in another embodiment of the present invention;

Fig. 10 is a perspective view of a waterproof connector in another embodiment of the present invention;

Fig. 11 is a schematic cross-sectional view of a waterproof connector in another embodiment of the present invention;

FIG. 12 is a schematic cross-sectional view of a waterproof connector in another embodiment of the present invention.

Explanation of reference signs

10a, 10b conductive terminals

20a, 20b insulating seat body

21a, 21b receiving section 22a, 22b accommodation tank

30a, 30b wire

40a, 40b cladding body

10 conductive terminals

11 Plug-in terminal 12 Welding terminal

20 insulating seat body

21 undertaking section 211 external thread

212 fixed slots 22 accommodation slots

23 socket slots 24 perforations

30 wires

31 core wire

40 hollow cylinder

41 internal thread 42 positioning ring

421 positioning plane

50 cladding

60 protective cases

8 molds

81 upper module 82 lower module

83 cavity 84 sprue

85 sprue

Detailed ways

The detailed description and technical content of the present invention are described below with accompanying drawings. However, the attached drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Please refer to Figure 4 to Figure 7, the waterproof connector provided by the present invention includes:

Two or more conductive terminals 10;

An insulating base body 20 for the conductive terminal 10 to pass through and fix, and the insulating base body 20 has a receiving section 21;

The electric wire 30 has two or more core wires 31, and the core wires 31 are respectively connected to one end of the conductive terminal 10;

a hollow cylinder 40, connected to the receiving section 21, and located on one side of the electric wire 30; and

The covering body 50 covers the receiving section 21 , the hollow cylinder 40 , the core wire 31 and one end of the conductive terminal 10 .

As shown in Figures 3 to 7, the manufacturing method of the waterproof connector in the present invention includes the following steps:

a), two or more conductive terminals 10 are respectively pierced and connected inside the insulating base body 20 (as shown in Figure 4); in this step, the conductive terminals 10 are made of metal with good conductivity such as copper material, it has a plug end 11 and a welding end 12 extending from the plug end 11. The right side of the insulating base 20 is a receiving section 21, the receiving section 21 is formed with an accommodating groove 22, and the external thread 211 is formed on the outside of the receiving section 21; One end (such as the left side of the insulating seat body 20) is formed with a plug-in groove 23, and two or more perforations 24 communicating with the accommodating groove 22 and the plug-in groove 23 are provided inside the insulating seat body 20. 24 runs through the accommodating groove 22 . During manufacture, the conductive terminals 10 are respectively inserted in the above-mentioned through holes 24 to be fixed, and the insertion end 11 is located inside the insertion groove 23 , while the welding end 12 partially protrudes outside the receiving section 21 .

b), connecting each core wire 31 of the electric wire 30 to one end of the conductive terminal 10 (as shown in FIG. 4 ); in this step, connecting each core wire 31 of the electric wire 30 to each On the soldering end 12 of the conductive terminal 10.

c), connect the hollow cylinder 40 to one end of the insulating base 20, and cover the connection between the conductive terminal 10 and the core wire 31 (as shown in Figure 5); in this step, the The hollow cylinder 40 is circular, and an internal thread 41 corresponding to the above-mentioned external thread 211 is formed on its inner edge surface, and two or two upper The positioning ring 42 arranged at intervals above; in order to increase the anti-rotation of the hollow cylinder 40, a positioning plane 421 (as shown in FIG. 8 ) for interlocking and positioning with the covering body 50 can be provided on the positioning ring 42 . During manufacture, the inner thread 41 of the hollow cylinder 40 is screwed to the aforementioned outer thread 211 , and the hollow cylinder 40 is covered outside the connection between each conductive terminal 10 and each core wire 31 .

d), provide a mold 8, put the semi-finished products formed in steps a to c into the inside of the mold 8 (as shown in Figure 6); in this step, the mold 8 is composed of an upper module 81 and a lower module 82, and The upper and lower modules 81, 82 are formed with mold cavities 83 corresponding to each other. In addition, a runner 84 communicating with the mold cavity 83 is provided in the middle of the upper module 81, and a mold cavity 83 is formed between the runner 84 and the mold cavity 83. There is a sprue 85, which is just located in the middle of the hollow cylinder 40; during manufacture, the aforementioned semi-finished connector is inserted into the mold cavity 83 and fixed.

e) Inject the molten coating body 50 into the mold 8, and cover the hollow cylinder 40 and the core wire 31 and partially cover the insulating seat body 20, the conductive terminal 10 and the electric wire 30 (as shown in Figure 6); in this step, molten liquids such as plastics or rubber are injected into the mold cavity 83 from the sprue 85 of the upper module 81, and the molten liquid will be filled into the accommodating groove 22 of the insulating seat body 20 and the inside of the hollow cylinder 40 , and cover the welding end 12 of each conductive terminal 10 , the receiving section 21 of the insulating base 20 , the hollow cylinder 40 , each core wire 31 and a partial area of the electric wire 30 . After the covering body 50 is cooled and solidified, the connector can be taken out from the mold cavity 83 (as shown in FIG. 7 ).

Please refer to FIG. 9 and FIG. 10 , which are respectively a cross-sectional schematic view and a perspective view of another embodiment of the present invention. The waterproof connector of the present invention further includes a protective cover 60 , and the protective cover 60 covers the outside of the covering body 50 , and partially cover the outside of the receiving section 21 and the wire 30 . The manufacturing method includes the step f of covering the insulating base body 20, the electric wire 30 and the covering body 50 with the protective sheath 60, the step f is carried out after the step e, in this step, the The completed connector is placed inside another mold (not shown in the figure) again, and the molten protective sheath 60 material is injected into the mold to cover the outside of the insulating seat body 20, the electric wire 30 and the cladding body 50; the protective sheath 60 After cooling and solidifying, the connector can be taken out from the mold (as shown in Figure 10).

Please refer to FIG. 11 , which is a schematic cross-sectional view of another embodiment of the present invention. A fixing groove 212 is formed inside the receiving section 21 , and one end of the hollow cylinder 40 is fixed in the fixing groove 212 . The procedure for this is that the hollow cylinder 40 can be screwed and connected with the receiving section 21 as mentioned above, and a fixing groove 212 can also be formed inside the receiving section 21 as in this embodiment, and waterproof glue can be applied on the inner wall of the fixing groove 212. In order to enhance its waterproof performance, one end of the hollow cylinder 40 is plugged into the fixing groove 212 for connection; in addition, two or more positioning holes are formed on the outer surface of the hollow cylinder 40 away from the end of the receiving section 21. The ring 42 is used to improve the holding force of the cladding body 50 occluded between the hollow cylinder body 40 and the insulating base body 20 so that it is not easy to fall off, and can also enhance the waterproof effect inside the connector.

Please refer to FIG. 12 , which is a schematic cross-sectional view of another embodiment of the present invention. The manufacturing method and structure of the present invention can also be applied to an AC waterproof connector. The manufacturing method is the same as that of the previous embodiment; therefore, it will not be repeated here. detail. However, in terms of structure, the receiving section 21 is formed with an accommodating groove 22 inside, and the insulating seat 20 is provided with two or more perforations 24 penetrating through the accommodating groove 22. The conductive terminal 10 has a plug-in terminal 11 and a connection On the welding end 12 of the insertion end 11 , the conductive terminal 10 is passed through and fixed to the through hole 24 , the insertion end 11 protrudes outside the insulating base 20 , and the welding end 12 is located inside the hollow cylinder 40 .

According to the waterproof connector and its manufacturing method of the present invention, it has at least the following advantages:

1. The hollow cylinder is closely combined with the receiving section of the insulating seat first, and then coated with the covering body, so that the insulating seat and the covering body can be fully combined, and it is not easy to produce gaps and has a better waterproof effect. It effectively solves the disadvantage that the two materials cannot be fully combined due to the large difference in physical properties in the production of conventional connectors.

2. The hollow cylinder is connected with the receiving section of the insulating seat body, and formed on the outside of the welding end and the electric wire. This structure can prevent the plastic of the covering body from directly hitting the welding end during injection molding, so that the welding Poor contact and falling off of terminals and wires can effectively improve the qualified rate of finished products.

3. The hollow cylinder is connected with the receiving section of the insulating seat and formed on the outside of the welding end and the wire. This structure can prevent the plastic of the covering body from directly hitting the core wire during injection molding, and make the core wire The wire is impacted and displaced by the plastic of the covering body, causing the core wire to be exposed to the covering body, resulting in a bad appearance of the product.

4. By connecting the hollow cylinder with the receiving section of the insulating seat, the structural strength of the waterproof connector can be effectively strengthened, the shear resistance and tensile strength of the structure can be improved, so that the waterproof connector can be used for a long time, and It will not break when it is repeatedly bent.

5. The hollow cylinder is connected with the receiving section of the insulating seat body. The hollow cylinder is formed on the outside of the welding end. When the hollow cylinder is made of hard material, it can effectively protect the welding end and the wire, so that the waterproof connector is bent. , can avoid the welding end and the electric wire formed on the inner side of the hollow cylinder to be bent and damaged.

Claims (16)

1. A waterproof connector, characterized in that the waterproof connector comprises: Two or more conductive terminals; A fixed insulating base body is provided for the conductive terminal to pass through, and the insulating base body has a receiving section; An electric wire has two or more core wires, and the core wires are respectively connected to one end of the conductive terminal; a hollow cylinder connected to the receiving section and located on one side of the electric wire; the hollow cylinder is covered at the connection between the conductive terminal and the core wire; and The covering body covers the receiving section, the hollow cylinder, the core wire and one end of the conductive terminal. 2. The waterproof connector according to claim 1, characterized in that, an accommodating groove is formed inside the receiving section, and an insertion groove is formed on the end of the insulating base body away from the receiving section, and in the Two or more through holes communicating with the accommodating groove and the insertion groove are arranged inside the insulating base body. 3. The waterproof connector according to claim 2, wherein the conductive terminal has a plug-in end and a welding end extending from the plug-in end, and the conductive terminal is fixed through the through hole, The insertion end is located inside the insertion groove, and the welding end is located inside the hollow cylinder. 4. The waterproof connector according to claim 1, characterized in that, an accommodation groove is formed inside the receiving section, and two or more perforations penetrating through the accommodation groove are provided inside the insulating seat , the conductive terminal has a plug-in end and a welding end extending from the plug-in end, the conductive terminal is fixed through the through hole, the plug-in end protrudes from the outside of the insulating base, and the The welding end is located inside the hollow cylinder. 5. The waterproof connector according to claim 1, wherein the receiving section has an external thread, the inner surface of the hollow cylinder has an internal thread, and the internal thread and the external thread are screwed together . 6. The waterproof connector according to claim 1, characterized in that, the waterproof connector further comprises a protective cover, the protective cover covers the outside of the covering body and partially covers the receiving section and the outside of the wire. 7 . The waterproof connector according to claim 1 , wherein a fixing groove is formed inside the receiving section, and one end of the hollow cylinder is passed through and fixed in the fixing groove. 8 . the 8 . The waterproof connector according to claim 1 , wherein a positioning ring is formed on the outer wall of the hollow cylinder, and the covering body and the positioning ring are firmly connected to each other. the 9 . The waterproof connector according to claim 8 , wherein the positioning ring has a positioning plane for interlocking and positioning with the covering body. the 10. A method for making a waterproof connector, characterized in that the method comprises: a) Connect two or more conductive terminals to the interior of the insulating base; b) connecting each core wire of the electric wire to one end of the conductive terminal; c) Connect the hollow cylinder to one end of the insulating base, and cover the connection between the conductive terminal and the core wire; d) providing a mold into which the semi-finished product formed in steps a to c is placed; and e) injecting the molten covering body into the mold, covering the hollow cylinder and the core wire and partially covering the insulating base, the conductive terminal and the electric wire. the 11. The method for manufacturing a waterproof connector according to claim 10, wherein the conductive terminal in the step a has a welding end, the insulating seat body has a receiving section, and the welding end is partially protruded to expose the The outside of the above-mentioned undertaking section. the 12 . The method for manufacturing a waterproof connector according to claim 10 , wherein the core wire in the step b is connected to the conductive terminal by welding. 13 . the 13. The manufacturing method of waterproof connector according to claim 10, characterized in that, the insulating base in the step c has external threads, and the inside of the hollow cylindrical body is formed with corresponding fittings for the external threads. internal thread, the insulating base is connected with the hollow cylinder in a threaded manner. the 14 . The method for manufacturing a waterproof connector according to claim 10 , wherein the hollow cylinder in step c is covered outside the junction between the conductive terminal and the core wire. 15 . the 15. The method for manufacturing a waterproof connector according to claim 10, characterized in that the method further comprises step f, in which step f wraps a protective sleeve on the outside of the covering body and partially covers the insulating seat body and the wire exterior. the 16. The method for manufacturing a waterproof connector according to claim 15, wherein step f is performed after step e. the

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