KR20200134659A - Bonding-free cable connector - Google Patents

Abstract

Disclosed is a bonding-free cable connector. The cable connector includes: a plurality of terminals formed of an electrically conductive material which is fastened to correspond to each of a plurality of extension lines included in the cable; a socket in which the plurality of terminals are accommodated; a retainer made of an electrically insulating material which is in common contact with at least two or more of the plurality of terminals disposed in the socket to press a part of the terminal; and a housing covering one end of the socket and the cable. According to the present invention, it is possible to easily manufacture the cable connector which satisfies electrical and mechanical connection reliability.

Description

Bonding-free cable connector {BONDING-FREE CABLE CONNECTOR}

The present invention relates to a cable connector for connecting an electronic device such as a camera module and a cable, and more particularly, to a cable connector for connecting a cable for supplying signals and power to the electronic device.

Various electronic devices such as camera modules are configured to receive external power and transmit and receive electrical signals to and from external control devices. Especially, in the case of electronic devices for vehicles, they are arranged at various locations inside the vehicle, so they are connected to power and control devices that are located at a distance. A cable prepared to be used is generally used. However, since cables prepared for transmission of various signals usually include a plurality of stations, it is very cumbersome to connect the electronic devices by peeling off the outer sheath of the cable and the insulation of the internal lines whenever the operator installs and repairs the electronic device. If the signal line (extension line) is incorrectly connected, it may cause malfunction of the device. Therefore, in order to connect electronic devices that perform a specific function while maintaining excellent electrical reliability, a separate cable connector is required.

On the other hand, a connector for connecting various signal lines included in a cable to an electronic device should have low noise generated at the connection portion and should not have the risk of disconnection of each signal line. In addition, moisture generated inside a cable including a plurality of extension lines may infiltrate the connection portion with the electronic device, thereby causing corrosion of the connection portion. Therefore, the cable connector for connecting electronic devices for vehicles that can be easily exposed to temperature changes in the external environment to the cable must not only have excellent electrical connection reliability and physical fastening force, but also the penetration of moisture from outside or inside the cable. Should be able to prevent.

In the conventional cable connector, in order to achieve the required physical tensile strength and at the same time prevent moisture from penetrating into the cable, the inner line of the cable and the electrically conductive portion of the cable are adhered and sealed with an adhesive. However, in terms of manufacturing, when an adhesive is used during the manufacturing process, not only the manufacturing process is complicated, but also the cost increases.

An object of the present invention is to provide a cable connector having a new structure capable of easily manufacturing a cable connector that satisfies the required electrical and mechanical connection reliability without using an adhesive, unlike a conventional cable connector.

The objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood from the following description.

The non-bonding cable connector according to the present invention includes: a plurality of terminals formed of an electrically conductive material that is fastened to correspond to each of a plurality of extension lines included in the cable; A socket accommodating the plurality of terminals; A retainer made of an electrically insulating material that is in common contact with at least two or more of the plurality of terminals disposed in the socket to press a part of the terminal; It may be configured to include; a housing covering one end of the socket and the cable.

Here, each of the plurality of terminals may include a crimping portion through which one end of the extension line is crimped; And a pin receiving portion accommodating a conductive pin provided in a case accommodating a predetermined electronic device circuit. In addition, a stopper connected to one side of the retainer may be formed between the pressing portion and the pin receiving portion.

Meanwhile, the socket may include a plurality of terminal receiving grooves into which each of the plurality of terminals is inserted; And a recess commonly formed on at least one side of at least two of the plurality of terminal receiving grooves.

In addition, the housing may include an inner molding portion formed by insert injection to capture one end of the socket and the cable; And an outer molding part formed by insert injection to capture the inner molding part. Here, it is preferable that the inner molding part is formed by insert injection molding using a nylon-based resin, and the outer molding part is formed by insert injection molding using PBT.

In another aspect, the non-bonding cable connector according to the present invention includes: a crimping portion crimped to one end of each of a plurality of extension lines included in the cable; A plurality of terminals formed of an electrically conductive material including; and a plurality of terminal receiving grooves into which each of the plurality of terminals is inserted; and a pin receiving portion for receiving a conductive pin provided in a case for accommodating a predetermined electronic device circuit; And a recess formed to communicate with at least two terminal receiving grooves among the plurality of terminal receiving grooves; and a portion of the two or more terminals inserted into the recess and inserted into the at least two or more terminal receiving grooves. It may be configured to include a retainer made of an electrically insulating material to be compressed, and a housing that covers a portion of the socket and the cable.

Here, it is preferable that a step is formed between the crimping portion and the pin receiving portion provided in the terminal, and the step is formed to correspond to the recess when the terminal is inserted into the corresponding terminal receiving groove of the socket. Do.

It is preferable that the retainer is arranged to press the pressing portion when inserted into the recess.

In addition, a pair of tension portions that are elastically deformable inward are provided at both ends of the retainer, and each of the pair of tension portions has a fastening protrusion protruding outward, and the fastening protrusion is inserted into a fastening groove provided in the socket. It is desirable to lose.

In addition, the housing may include an inner molding portion formed by insert injection to capture one end of the socket and the cable; It may be configured to include; an outer molding formed by insert injection to capture the inner molding.

In addition, the housing may include an inner molding portion formed by insert injection to capture one end of the socket and the cable; It includes an outer molding portion formed by insert injection to capture the inner molding portion, wherein the inner molding portion is preferably formed to capture the inside of the pressing portion for compressing the fastening groove provided in the socket and the plurality of inner wires.

It is preferable that the inner molding part is formed by insert injection molding using a nylon-based resin, and the outer molding part is formed by insert injection molding using PBT.

In addition, it is preferable that the inner molding portion includes a press-fit portion for pressing the outer shell of the cable in a direction opposite to each other with respect to one end of the cable.

And, the press-fit portion protruding from the inside of the inner molding portion to press the outer shell; And a groove formed outside the inner molding part corresponding to the protrusion.

The non-bonding cable connector according to the present invention has excellent watertightness without using an adhesive and at the same time improves electrical and mechanical connection reliability. In particular, since there is no need to use an adhesive at all when manufacturing a cable connector, the manufacturing process is simpler, which is advantageous for cost reduction. Therefore, it is possible to effectively reduce the proportion of manual labor in manufacturing the cable connector, and as a result, it is more advantageous in reducing cost and product cost.

1 is a schematic diagram showing an exploded view of each component of a cable connector according to the present invention.
2 is a perspective view showing a state in which terminals are respectively fastened to an extension of a cable in the cable connector according to the present invention.
3 is a perspective view showing an embodiment of a terminal used in the cable connector according to the present invention.
4 and 5 are perspective views showing an embodiment of a socket used in a cable connector according to the present invention.
6 is a cross-sectional view showing a structure in which a terminal is fastened to a socket using a retainer in the cable connector according to the present invention.
7 is a schematic diagram showing a watertight structure of a socket and a terminal using a retainer in the cable connector according to the present invention.
8 is a photograph illustrating a problem that may occur when the housing of the cable connector is formed by insert injection.
9 and 10 are schematic views showing a state in which an inner molding part is formed when manufacturing a cable connector according to the present invention.

In the present invention, various modifications may be made and various embodiments may be provided. Specific embodiments are illustrated in the drawings and will be described in detail through detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, numbers (eg, first, second, etc.) used in the description of the present specification are merely identification symbols for distinguishing one component from another component.

Hereinafter, with reference to the accompanying drawings will be described in detail for the implementation of the present invention.

1 is a schematic diagram showing the components of a non-bonding cable connector according to the present invention separated. As shown in FIG. 1, the cable 100 includes a plurality of extension lines 110 therein. Each of the inner wires 110 is insulated and coated by the inner skin 120, and the outer shell 130 covers the entire plurality of inner wires 110 covered with the inner skin 120. In order to manufacture the cable connector according to the present invention, first, the outer shell 130 of one end of the cable 100 is removed, and then one end of the inner shell 120 covering each of the plurality of internal lines 110 is removed. In this way, the ends of the plurality of extension lines 110 are exposed.

Terminals 200 formed of an electrically conductive material are respectively coupled to the exposed ends of the extension lines 110. As shown in FIGS. 2 and 3, the terminal 200 accommodates a crimping part 210 to which the end of the extension line 110 is crimped, and a conductive pin (not shown) provided in a case accommodating a predetermined electronic device circuit. The pin receiving part 220 is provided. The crimping unit 210 may be configured to compress the inner line 110 in a clamping manner. In addition, the pin receiving portion 220 is provided with a space in which the conductive pin can be accommodated. The pin receiving part 220 may be provided with pin springs 230 that are bent inward on opposite sides so as to improve the reliability of fastening and electrical connection with the conductive pin. The pin spring 2230 may be in close contact with the conductive pin while being elastically displaced when the conductive pin is fitted.

As shown in FIG. 2, terminals 200 corresponding to each of the plurality of extension lines 110 are respectively fastened. Here, a step 240 may be provided between the crimping part 210 and the pin receiving part 220, and the step 240 is formed to correspond to the recess 420, and the retainer 300 to be described later is inserted. It functions as a stopper to prevent and block the terminal from slipping. In FIGS. 2 and 3, a terminal 200 is shown in which one side of the pin receiving portion 220 formed stepwise from the crimping portion 210 functions as a stopper. Alternatively, a stopper may be provided between the crimping part 210 and the pin receiving part 220 as a structure to be separated from the pin receiving part 220 and formed stepped from the crimping part 210. The crimping portion 210 and the pin receiving portion 220 constituting the terminal 200 may be integrally formed. Here, the stopper is between the crimping portion 210 and the pin receiving portion 220, the terminal 200 when inserted into a conductive pin provided in an external electronic device case that is connected to the cable connector or prevents the insertion of the retainer 300 This is to prevent it from being pushed inward. Therefore, the stopper may be formed in a variety of shapes that can be connected to one side of the retainer 300 to be described later by being formed to be stepped with the pressing portion 210.

Next, as shown in FIGS. 4 and 5, the socket 400 is in communication with a plurality of terminal receiving grooves 410 into which each of the plurality of terminals 200 is inserted, and at least two or more terminal receiving grooves 410. The formed recess 420 is provided. Here, the terminal receiving groove 410 is formed to penetrate from one side of the socket 400 to the other side. In addition, each of the terminal receiving grooves 410 are isolated from each other, but some of the terminal receiving grooves 410 are exposed in the region where the recess 420 is formed. In FIGS. 4 and 5, a socket 400 having a two-row structure in which three terminal receiving grooves 410 are communicated by one recess 410 is shown, but an arbitrary number according to the number of extension lines 110 It can be formed in batches.

Meanwhile, a pair of tension portions 310 that can be elastically deformed inward are provided at both ends of the retainer 300. In addition, each of the pair of tension units 310 is formed with a fastening protrusion 320 protruding outward. The fastening protrusion 320 is fitted into the fastening groove 430 provided in the socket 400 when the retainer 300 is fitted into the recess 420.

Returning to FIG. 1 again, after each terminal 200 is fastened to the end of the extension line 110, each terminal 200 is inserted into the corresponding terminal receiving groove 410 provided in the socket 400. After that, by pressing the retainer 300 into the recess 420, each terminal 200 is firmly fixed to the socket 400. As shown in Fig. 6, the socket 400, the terminal 200, the retainer 300, and the extension line 110 assembled in this way can be mechanically firmly fixed without using a separate adhesive. That is, the retainer 300 By pressing in the recess 420, the retainer 300 is in common contact with the two or more terminals 200 communicated by the recess 420, whereby a part of the terminal 200 (in particular, This fastening structure prevents the terminal 200 from being dislodged to the outside while being used while effectively blocking it from being pushed in. When the conductive pin provided in the external electronic device case is inserted , Since the stopper (or step 210) is blocked by one side of the retainer 300, and the retainer 300 is again blocked by the socket 400, the terminal 200 can be prevented from being pushed into the connector. In addition, since the retainer 300 strongly presses the crimping portion 210, the terminal 200 can be prevented from being removed from the socket 400 when the connector is removed from an external electronic device. It is possible to manufacture a cable connector having very excellent mechanical fastening force of each of the components constituting the connector without the use of. In addition, the gap between the extension line 110, the crimp part 210 and the socket 400 can be minimized. , Since the injection resin effectively blocks penetration of the injection resin into the interior of the terminal 200 during the injection process for forming the housing to be described later, electrical reliability can be ensured. Here, the adhesion force of the cable 100 by the retainer 300 In order to maximize, when inserting each extension 110 to which the terminal 200 is fastened to the terminal receiving groove 410, it is preferable that a part of the endothelium 120 is inserted into the terminal receiving groove 410. The endothelium 120 is partially deformed when pressed by the retainer 300 to effectively fill the fine pores of the terminal receiving groove 410 (see FIG. 7 ).

Next, after fastening all of the extension line 110, the terminal 200, the retainer 300, and the socket 400, the housing 500 is formed. Here, the housing 500 may have a linear structure in which the terminal 200 and the insertion direction of the conductive pin and the extension direction of the cable 100 are arranged in a straight line, or may be formed to have an angular structure bent at a predetermined angle. have.

As will be described later, the housing 500 of the cable connector according to the present invention may include an inner molding part 510 and an outer molding part 520, and in the present invention, the housing 500 is an inner molding part 510 And the reason for forming the double structure including the outer molding portion 520 is as follows.

That is, in the case of forming a molding part constituting the housing 500 using an insert injection process to manufacture a cable connector, as shown in FIG. 8, a defect in which the outside of the molding part is peeled off (area A) frequently occurs, There is a problem that the internal line is exposed. When a molding failure occurs in the connector housing in this way, the electrical reliability of the cable connector is deteriorated, such as moisture infiltrates into the connector or the extension line 110 is separated. This problem is also caused in a form in which the connector body and the cable have a straight structure, but is caused more frequently, especially when the connector body and the cable have an angled structure. Such defects may be confirmed in advance through an exterior inspection, but if there is a fine crack in the body, it is difficult to determine it through an exterior inspection, and in this case, there is a risk of problems such as corrosion due to moisture penetration during actual use.

In the present invention, in order to prevent such a problem, a double molding structure of the inner molding part 510 and the outer molding part 520 is adopted. In addition, in forming the inner molding part 510, as shown in FIGS. 9 and 10, in order to improve the tensile strength of the connector body and the cable while effectively preventing moisture from penetrating from the outer shell 130 of the cable 100, When forming the inner molding portion 510 by insert injection, a press-fit portion 511 for pressing the outer shell 130 in a direction opposite to each other with respect to one end of the cable 100 is formed. The press-fit portion 511 may be formed by pressing an end portion of the inner molding portion 510 using a jig during an insert injection process. Thereby, the press-fit portion 511 is formed with a protrusion 512 protruding from the inside of the inner molding portion 300 so as to compress the outer shell 130, and the outer side of the inner molding portion 300 corresponding to the protrusion 512 In the groove portion 513 is formed. A pair of protrusions 512 facing each other improves the tensile strength of the connector housing and the cable by compressing the outer shell 130. In addition, the groove portion 513 strengthens the binding force with the outer molding portion 520 formed in a subsequent process and at the same time makes the watertight structure formed by the outer molding portion 520 more robust.

Next, an outer molding part 400 that captures the inner molding part 510 is formed. The outer molding part 520 prevents moisture from penetrating into the connector from the outside, and furthermore, the connector with superior reliability by finally blocking micro-cracks or exposure of the inner wire generated after the inner molding part 510 is formed. Can be manufactured.

Meanwhile, when the inner molding part 510 is formed by insert injection, it is formed to capture the fastening groove 430 provided in the socket 400 and the crimping part 210 for compressing a plurality of inner lines therein. Here, in order to improve the electrical connection reliability, the injection resin for forming the inner molding portion 510 should not be introduced into the terminal 200 disposed inside the socket 400. Therefore, it is preferable to use a nylon-based resin having a high viscosity as the injection resin used to form the inner molding part 510. In addition, in order to form the outer molding part 520, it is preferable to use a polybutylene terephthalate (PBT) resin. PBT is generally used as a connector housing in terms of excellent thermal properties, friction resistance, abrasion resistance, and excellent chemical resistance, and the use of PBT with reinforced glass fiber (GF) added as an injection resin is more effective in terms of reinforcing properties. desirable. As described above, the gap between the terminal 200 and the socket 400 is primarily minimized by the retainer 300, and additionally, the inner molding part 510 is formed by using a highly viscous nylon-based resin. 200) Seal so that low-viscosity PBT does not penetrate inside. That is, when the inner molding part 510 is molded with a nylon-based resin and the outer molding part 520 is molded with PBT, the injection resin is prevented from penetrating into the microcavities that may occur in the socket 400 and at the same time A cable connector with improved tensile force of the housing 500 including the molding part 510 and the outer molding part 520 may be manufactured.

The cable connector having the above structure is excellent in watertightness without using an adhesive, and at the same time, electrical and mechanical connection reliability is improved. In particular, since there is no need to use an adhesive at all when manufacturing a cable connector, the manufacturing process is simpler, which is advantageous for cost reduction. Therefore, it is possible to effectively reduce the proportion of manual labor in manufacturing the cable connector, and as a result, it is more advantageous in reducing cost and product cost.

Although a preferred embodiment of the present invention has been described so far, those of ordinary skill in the art to which the present invention pertains may be implemented in a modified form within the scope not departing from the essential characteristics of the present invention. Therefore, the embodiments of the present invention described herein should be considered from a descriptive point of view rather than a limiting point of view, and the scope of the present invention is shown in the claims rather than the above description, and all differences within the scope equivalent thereto are the present invention. Should be interpreted as being included in.

Claims (15)

A plurality of terminals formed of an electrically conductive material that is fastened to correspond to each of a plurality of extension lines included in the cable;
A socket accommodating the plurality of terminals;
A retainer made of an electrically insulating material that is in common contact with at least two or more of the plurality of terminals disposed in the socket to press a part of the terminal;
Containing, a cable connector; a housing covering one end of the socket and the cable.
The method of claim 1,
Each of the plurality of terminals,
A pressing portion to which one end of the extension line is compressed; And
A cable connector comprising: a pin receiving portion for receiving a conductive pin provided in a case for accommodating a predetermined electronic device circuit.
The method of claim 2,
Each of the plurality of terminals has a stopper connected to one side of the retainer between the crimping portion and the pin receiving portion.
The method of claim 1,
The socket,
A plurality of terminal receiving grooves into which each of the plurality of terminals is inserted; And
And a recess formed in common at one side of at least two or more of the plurality of terminal receiving grooves.
The method of claim 1,
The housing,
An inner molding portion formed by insert injection to capture one end of the socket and the cable;
And an outer molding part formed by insert injection to capture the inner molding part.
The method of claim 5,
The inner molding part is formed by insert injection molding using a nylon-based resin, and the outer molding part is formed by insert injection molding using PBT.
A crimping part that is crimped to one end of each of a plurality of extension lines included in the cable; And a plurality of terminals formed of an electrically conductive material including a; and a pin receiving portion accommodating a conductive pin provided in the case for accommodating a predetermined electronic device circuit,
A plurality of terminal receiving grooves into which each of the plurality of terminals is inserted; And a recess formed to communicate with at least two or more terminal receiving grooves among the plurality of terminal receiving grooves; and
A retainer made of an electrically insulating material that is inserted into the recess and compresses a part of the two or more terminals inserted into the at least two or more terminal receiving grooves,
A cable connector comprising a housing covering the socket and a portion of the cable.
The method of claim 7,
A step is formed between the crimp portion and the pin receiving portion provided in the terminal, and the step is formed to correspond to the recess when the terminal is inserted into the corresponding terminal receiving groove of the socket. , Cable connector.
The method of claim 8,
Wherein the retainer is arranged to press the crimping portion when inserted into the recess.
The method of claim 7,
Both ends of the retainer are provided with a pair of tension parts that are elastically deformable inward, and each of the pair of tension parts has a fastening protrusion protruding outward, and the fastening protrusion is fitted into a fastening groove provided in the socket. Characterized in, cable connector.
The method of claim 7,
The housing,
An inner molding portion formed by insert injection to capture one end of the socket and the cable;
And an outer molding part formed by insert injection to capture the inner molding part.
The method of claim 10,
The housing,
An inner molding portion formed by insert injection to capture one end of the socket and the cable;
Including; an outer molding formed by insert injection to capture the inner molding,
The inner molding portion, characterized in that formed so as to capture the inside of the compression groove provided in the socket and the compression portion for compressing the plurality of internal lines.
The method of claim 11,
The inner molding part is formed by insert injection molding using a nylon-based resin, and the outer molding part is formed by insert injection molding using PBT.
The method of claim 11,
The inner molding portion, characterized in that it comprises a press-fit portion for pressing the outer shell of the cable in a direction opposite to each other with respect to one end of the cable, cable connector.
The method of claim 14,
The press-fit portion includes a protrusion protruding from the inside of the inner molding portion to press the outer skin; And a groove formed outside the inner molding part corresponding to the protrusion.

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