KR102265410B1 - Electrical connector having waterproof connection terminal with two pins linkage structure - Google Patents

Abstract

The present invention relates to an electrical connector having a waterproof connection terminal of a two-stage connection pin structure, comprising a terminal portion having a plurality of holes in the longitudinal direction to insert the connection terminal, and a connection terminal inserted through each hole of the terminal portion. wherein the terminal part is composed of two parts having different diameters inside each hole, that is, a small-diameter part corresponding to the front male connector and a large-diameter part located at the rear of the small-diameter part, and between the small-diameter part and the large-diameter part A step is formed as a stop part for determining the position of the connection terminal, and the connection terminal is a two-stage connection pin structure of a first part and a second part connected in the front and rear longitudinal directions, and the second connection terminal is connected to the rear wire cable. and a connecting pin as a part and a connecting jack as the first part respectively connected to the connecting pin and the front male connector connecting terminal.

Description

Electrical connector having a waterproof connection terminal with a two-stage connection pin structure {ELECTRICAL CONNECTOR HAVING WATERPROOF CONNECTION TERMINAL WITH TWO PINS LINKAGE STRUCTURE}

The present invention relates to an electrical connector, and more particularly, to an electrical connector having a waterproof connection terminal having a two-stage connection pin structure.

BACKGROUND ART In general, circuit boards, cables, and the like respectively applied in accordance with various uses are arranged in electric devices, and they are electrically connected. In the case of electrically interconnecting the circuit boards or between a circuit board and a plurality of conductors such as cables, in many cases, an electrical connector is used. In general, an electric connector has a female connector (receptacle connector) and a male connector (plug type connector) so that they can be inserted and removed from each other. A female connector is a modular connector by having a plurality of female connection elements made of a material having elasticity in an insulating housing, and in a male connector, a plurality of connection elements are arranged on both surfaces of a partition wall of a male part. In general, when the female/male pair of electrical connectors are removed and inserted into each other, the connecting elements of the female/male connector are connected to each other by fitting (meaning “inserting” any two components.) This fitting connection makes it possible to electrically connect or intermittently between the conductors. For example, such a pair of male/female electrical connectors are fitted at the time of assembling an apparatus using them, and are pulled out and separated when necessary for purposes such as power saving or maintenance.

On the other hand, a pair of female/male electrical connectors are flexible so that a plurality of wires and terminals are interconnected by soldering or crimping, etc., and then the end of the connector and a part of the female/male connector including the exposed portion thereof are covered. It is provided by molding with a synthetic resin material. This molding part not only has a waterproof function, but also electrically insulates a plurality of wires and terminals, and at the same time prevents wires and terminals from being separated from each other even when the connector is stretched.

In particular, in the case of electrical connectors that are installed outdoors or closely related to water, such as water meters, waterproofing is urgently needed. For this purpose, various types of waterproof connectors are being released.

As an example, the waterproof connector shown in Korea Utility Model No. 455135 of FIG. 1 is an electric wire so as to surround the end of the molding part 3 of the female/male connector 1 and 2 respectively installed at the end of the wire cable 4 . It is configured to prevent water from flowing into the connector by forming a cover part of a certain shape between the cable 4 and the cable 4 .

However, in such a waterproof connector, the molding part made of rubber or synthetic resin covering the wire cable or the cover part covering the molding part and the wire cable end part is resistant to weathering and seasonal changes due to strong external impact, tension, or wind and rain. Due to the temperature difference, it hardens itself or cracks are generated, and moisture or moisture from the outside flows into the inside of the connector, which often causes an electrical short.

Accordingly, the present invention has been developed to solve the above problems, and an object of the present invention is to provide an electrical connector having a waterproof connection terminal of a two-stage connection pin structure having both waterproofness and cost saving effect.

According to one aspect of the present invention for achieving the above object, it comprises a terminal portion having a plurality of holes in the longitudinal direction to insert the connection terminal, and a connection terminal inserted through each hole of the terminal portion, the terminal The inside of each hole is composed of two parts with different diameters, that is, a small-diameter part corresponding to the front male connector and a large-diameter part located at the rear of the small-diameter part, and the positioning of the connection terminal is determined between the small-diameter part and the large-diameter part A step is formed as a stop for the connection terminal, and the connection terminal is a two-stage connection pin structure of a first part and a second part connected in the front and rear longitudinal directions, and a connection pin as a second part connected to the rear wire cable and the There is provided an electric connector comprising a connecting pin and a connecting jack as a second part respectively connected to the front male connector connecting terminal.

According to the present invention, it is preferable that the connection jack is formed by rolling in a press molding method using phosphor bronze, and the connection pin is made by cutting through a cutting process using a brass structure.

In addition, in the present invention, the connection jack is composed of a first half into which a connection terminal of a male connector is inserted and a second half into which a part of the connection pin is inserted, and the outer diameter of the first half corresponds to the small diameter portion of the terminal, and the second half has an outer diameter Corresponding to the large-diameter portion of the terminal, the first half has a cut-out elastic structure divided into at least two parts, and the front end is bent outwardly around a certain inflection point so that the diameter at the inflection point is smaller than the connection terminal of the male connector. It is preferable to configure

In addition, in the present invention, the connection pin is composed of a front part fitted to the second half of the connection jack, a rear part to which the wire cable is soldered, and a middle part between the front part and the rear part, and the middle part is one or more obstacles along the circumferential surface. It is preferable that the group is formed, and the locking protrusion has a structure that is gently and slightly inclined upwardly toward the rear part so that it is smoothly fitted into the respective holes of the terminal part and is not easily removed.

From the above-described characteristics, the present invention provides a molding part made of rubber or synthetic resin covering the wire cable or the cover part covering between the molding part and the wire cable end, weathering and seasonal changes due to strong external impact or tension, or wind and rain. Even if moisture or water enters the inside of the connector due to hardening or cracks due to the temperature difference, it can provide perfect waterproofness and cost-saving effect.

1 is a view showing the structure of an electrical connector of a conventional general form;
2 is an exploded perspective view showing the configuration of an electrical connector, particularly a female connector, having a waterproof connection terminal of a two-stage connection pin structure according to the present invention;
3 is a cross-sectional view showing the structure of a terminal part constituting the female connector of FIG. 2;
4 is a front view showing a connection jack and a connection pin constituting the waterproof connection terminal of FIG. 2;
5 is an assembly cross-sectional view of an electric female connector according to the present invention having a waterproof connection terminal of FIG. 2;
6 is a partially enlarged cross-sectional view showing a connection state of a male connector to the female connector of FIG. 5;

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and examples.

In the following embodiments, the illustration and description are omitted except for essential parts in describing the invention, and the same reference numerals are given to the same and similar elements throughout the specification, and detailed descriptions thereof are omitted without repeating them. do.

2 is an exploded perspective view showing the configuration of an electrical connector, particularly a female connector, having a waterproof connection terminal having a two-stage connection pin structure according to the present invention, and FIG. 3 is an exploded perspective view showing the structure of a terminal part constituting the female connector of FIG. It is a cross-sectional view, and FIG. 4 is a front view showing a connection jack and a connection pin constituting the waterproof connection terminal of FIG. 2 .

As described above, the present invention relates to an electrical connector having a waterproof connection terminal, and generally both male and female connectors are applicable, but in this embodiment, the structure of the female connector as an embodiment will be mainly described. .

It is provided that the waterproof connection terminal constituting the electrical connector of the present invention has a two-stage connection pin structure. In general, an electrical connector includes a terminal part 10 made of a synthetic resin material and a connection terminal inserted through the terminal part. Here, the terminal part 10 is formed with a plurality of holes 13 in the longitudinal direction, and the inside of each hole 13 in the terminal part 10 has two parts having different diameters, that is, the front male connector 40 (Fig. 6) and a corresponding small-diameter portion 13a and a large-diameter portion 13b located behind the small-diameter portion. The difference in diameter between the small diameter portion 13a and the large diameter portion 13b is not large, and is intended to provide a STOP function for positioning the connection terminals inserted into the respective holes 13 of the terminal portion 10. , a step 13c as a stop is formed between the small-diameter portion 13a and the large-diameter portion 1b for this purpose. Therefore, after the connection terminal is inserted through the rear end 12 of each hole 13 of the terminal part 10, the connection terminals 41 of the male connector 40 through the front end 11 of the hole; see FIG. ) is inserted and an electrical connection can be made.

In addition, in general, each connection terminal of the electric female connector is composed of a connection jack in the front part into which the connection terminal of the male connector is inserted, and a cable connection part in which the wire cable in the rear part is connected. Although it may be provided in a single body shape using a material of a material, in the present invention, the connection terminal of the female connector will be mainly described having a two-stage waterproof connection pin structure.

For example, if it is composed of a single body as above, it can be formed to have a single body structure as a whole by using phosphor bronze, which is generally inexpensive and has excellent workability, and is rolled in a press mold. However, since such a structure is weak in airtightness (or watertightness) of the parts connected by being rolled, there is a problem that moisture, moisture, or foreign substances may generally penetrate. In particular, as mentioned in the prior art, when water seeps through the molding part or the cover part due to its own defects, environmental changes, or long-term use, the connection jack is press-fitted into the hole of the terminal part, so airtightness can be maintained, but the terminal part The cable connection part drawn out can cause water to directly penetrate through the connection part, thereby causing an electrical short. In addition, in some cases, it may be configured to have a single body structure by cutting it by a cutting process using brass, but if it is configured as a single body structure using brass, there is generally no connection part, so a perfect waterproof effect can be provided, but the production period It takes a lot of work, and there is a problem that the manufacturing cost is also increased.

Accordingly, in the present embodiment, by combining the above two methods, it is possible to provide a connection terminal of a female connector having both waterproofness and cost saving effect. In this case, the connection terminal of the female connector is a two-stage connection composed of a first part and a second part. It can be provided in a pin structure. In particular, the first part and the second part have a structure connected to each other in the longitudinal direction, and the second part of the connection terminal is composed of a connection pin 30 connected to the wire cable, and the first part of the connection terminal is the connection pin ( 30) and a connection jack 20 respectively connected to the connection terminal 41 of the male connector. In particular, the connection jack 20 inserted into the terminal part 10 has a rather complicated structure, which increases the unit price when manufactured by a cutting process. It may be desirable to employ this method. In addition, the connection pin 30 is connected to the wire cable outside the terminal unit 10 by soldering, and since the structure is rather simple, it may be preferable to employ a method of cutting by a cutting process using brass.

FIG. 5 is an assembled cross-sectional view of an electric female connector according to the present invention having a waterproof connection terminal of FIG. 2, and FIG. 6 is a partially enlarged cross-sectional view illustrating a connection state of a male connector to the female connector of FIG.

In this embodiment, the first part of the connection jack 20 is a front part 21 into which the connection terminal 41 of the male connector is inserted and a second part 22 into which a part of the connection pin 30, which is the second part, is inserted. can be configured. Here, the first half 21 has an outer diameter corresponding to the small diameter portion 13a having a small diameter in each of the holes 13 of the terminal portion 10, and the second half 22 has an outer diameter of each hole ( 13) to correspond to the large diameter portion 13b with a large diameter, the connection jack 20 is inserted into each hole 13 of the terminal portion 10, and the second half 22 has a hole 13 It is hung on the step 13c of the large-diameter portion 13b, and the first half 21 is inserted into the small-diameter portion 13a.

The front part 21 of the connection jack 20 has an incision-type elastic structure divided into at least two parts and can be configured to be open to the outside, which is caused by the frequent insertion of the male connector connection terminal 41. By maintaining a certain elastic force without opening the entrance, a stable electrical connection is possible between the front part 21 and the male connector connection terminal 41 . In particular, for this, the front part 21 has a tapered shape in the front end direction and the front end may have a shape bent outwardly around a certain inflection point 21c. In this case, the aperture 21b at the inflection point 21c part. ) is smaller than the connection terminal of the male connector, and the front end of the front part 21 is configured to have a slightly wider aperture than the connection terminal of the male connector, so that it is preferable to facilitate insertion of the connection terminal of the male connector.

In addition, the second part of the connection pin 30 is a front part 31 fitted to the rear part 22 of the connection jack 20 and a rear part 33 to which an electric wire cable is soldered, and between the front part and the rear part. may be composed of a middle portion 32 of The middle portion 32 has the same outer diameter as the second half of the connection jack, and one or more locking protrusions 32a and 32b may be formed along the circumferential surface thereof. These locking projections (32a, 32b) are the connection jack 20 constituting the connection terminal of the female connector and the connection pin 30 is smoothly inserted into each hole 13 of the terminal part 10 and does not come off easily. In order to avoid this, in this embodiment, the locking projections 32a and 32b have a structure that is gently and finely inclined upward toward the rear part 33 side, so that they dig into the inner surface of the hole 13 of the terminal part 10 and are constantly caught. It is desirable to configure it to maintain a state.

On the other hand, as shown in FIG. 5 , the connection jack 20 in the front and the connection pin 30 in the rear are all press-fitted and caught in each hole 13 of the terminal part 10 to obtain an airtight state. Since it can be maintained, it is preferable to manufacture the connection jack 20 by rolling it in a press molding method. However, the connection pin 30 having the rear portion 33 exposed out of each hole 13 of the terminal portion 10 for soldering connection of the wire cable is difficult to maintain airtightness when manufactured by a press molding method, so brass It is preferable to cut and manufacture by cutting. Through this, even if water seeps into the molding part or the cover part, the perfect waterproof effect can be maintained.

Although various embodiments of the present invention have been described above, the contents described so far are merely illustrative of some of the preferred embodiments of the present invention, and except as may appear in the claims appended below It is not limited by the above-mentioned content. Accordingly, the present invention understands that many changes, modifications and substitutions of equivalents can be made without departing from the spirit and spirit of the invention within the scope set forth in the claims below by those of ordinary skill in the art. will have to

Claims (5)

A terminal portion having a plurality of holes in the longitudinal direction to insert the connection terminal, and a connection terminal inserted through each hole of the terminal portion,
The terminal part is composed of two parts in which the inside of the holes have different diameters, that is, a small-diameter part corresponding to the front male connector and a large-diameter part located at the rear of the small-diameter part, and between the small-diameter part and the large-diameter part, the A step is formed as a stop for positioning,
The connection terminal has a two-stage connection pin structure of a first part and a second part connected in the front and rear longitudinal directions, and the connection pin as the second part connected to the rear wire cable, the connection pin, and the front male connector connection terminal and a connecting jack as the first part connected to each,
The connection jack is composed of a first half into which a connection terminal of a male connector is inserted and a second half into which a part of the connection pin is inserted, and the outer diameter of the first half corresponds to the small diameter portion of the terminal portion, and the second half has an outer diameter of the large diameter portion of the terminal portion. Correspondingly, the first half and the second half are provided in a stepped structure,
The connection pin is composed of a front part fitted to the second half of the connection jack, a rear part to which an electric wire cable is soldered, and a middle part between the front part and the rear part, and the middle part is characterized in that one or more locking protrusions are formed along the circumferential surface. electrical connector. The method of claim 1,
The connection jack is formed by rolling phosphor bronze by press molding, and the connection pin is an electrical connector, characterized in that it is made by cutting brass by a cutting process. delete The method of claim 1,
The electric connector, characterized in that the first half has a cut-out elastic structure divided into at least two parts, and the front end is bent outwardly around a certain inflection point so that the diameter at the inflection point is smaller than that of the connection terminal of the male connector. The method of claim 1,
The electrical connector according to claim 1, wherein the locking projection has a structure that is gently and slightly inclined upwardly toward the rear portion so that it is smoothly fitted into the respective holes of the terminal portion and is not easily removed.

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