KR102553861B1 - Plug connector - Google Patents

Abstract

A plug connector 10 coupled to the socket connector 20 is provided.
The plug connector 10 includes a mold portion 100 including a base portion 110 and first to fourth wall portions 120 to 150 protruding from an upper surface of the base portion 110; and a first plug terminal including a first arm portion, wherein the first arm portion includes a first extension portion 220 extending while covering at least a portion of an upper portion of the first wall portion 120; A second extension part 230 extending from one end of the extension part 220 and protruding from the lower surface of the base part 110 is included, and the mold part 100 is insert-molded with respect to the first plug terminal 200. formed so that there is no gap between the lower surface of the first extension part 220 and the mold part 100, and the first extension part 220 is at least partially connected to the adjacent upper surface of the first wall part 120. There is a step at (E1 or E2), and the step (E1, E2) is formed so that the first extension part 220 protrudes further.

Description

Plug connector {PLUG CONNECTOR}

The present invention relates to a plug connector. More specifically, the present invention relates to a plug connector including a power terminal.

In general, when boards are connected to each other, two connectors are used that are connected to each board by a method such as soldering, and the two connectors can be connected to each other. Here, one of the two connectors is a plug connector, and the other is a socket connector. A socket connector is also called a receptacle connector. These plug connectors and socket connectors may be formed by arranging terminals in a mold unit. A plug connector and a socket connector may be mated to each other to form an electrical connector assembly.

According to the miniaturization trend of electronic devices, miniaturization and low profile of connectors are also required. However, as connectors are miniaturized and low-profile, problems such as the molded portion of the connector being easily damaged and crushed, unwanted solder wicking, or not having a desired level of terminal holding capacity have occurred. there is.

A technical problem to be solved by the present invention is to provide a plug connector in which strength and mountability are improved, solder wicking through gaps is minimized during mounting, and damage to mold parts is minimized.

In addition, it is to solve problems such as crushing of the mold part and generation of debris when coupling the plug connector and the socket connector.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to the present invention, a plug connector coupled to a socket connector includes a base portion, a first wall portion protruding from the upper surface of the base portion, a second wall portion protruding from the upper surface of the base portion and intersecting the first wall portion, and an upper surface of the base portion. A third wall portion protruding from and intersecting the second wall portion and facing the first wall portion, and a fourth wall portion protruding from the upper surface of the base portion and intersecting the first and third wall portions and facing the second wall portion. Mold part to do; and a first plug terminal including a first arm portion, wherein the first arm portion includes a first extension portion extending while covering at least a portion of an upper portion of the first wall portion, and extending from one end of the first extension portion. and a second extension portion protruding from a lower surface of the base portion, wherein the mold portion is formed by insert molding with respect to the first plug terminal, so that there is no gap between the lower surface of the first extension portion and the mold portion, and the first extension portion is formed by insert molding. The plug connector has a step difference between an upper surface adjacent to the first wall portion and at least a partial section, and the step difference is formed such that the first extension portion protrudes further.

Preferably, the first extension portion is not buried in the first wall portion, at least a portion of the second extension portion is embedded in the first wall portion, and the section in which the step exists is a vertex of the first extension portion (頂點) to a point where the first extension part and the second extension part meet.

Preferably, the first arm portion further includes a third extension portion extending from the other end of the first extension portion along an outer surface of the first wall portion, and the section where the step exists is a vertex of the first extension portion. (頂點) to a point where the first extension part and the third extension part meet.

Preferably, the section where the step difference exists further includes from one end of the third extension, which is a point where the first extension and the third extension meet, to the other end of the third extension.

Preferably, when the plug connector is viewed from the top, in a longitudinal section of a location where the first extension part and the top surface of the first wall part are adjacent, the cross section of the first extension part is a part of a circle and the top surface of the first wall part is adjacent. more protruding.

Preferably, when the plug connector is viewed from the top, a cross-section of the first extension portion is a U-shape with an open bottom at a longitudinal cross-section of a location where the first extension portion and the top surface of the first wall portion are adjacent to each other, and the first wall It protrudes from the upper surface of the part.

Preferably, the second extension part further includes a first mounting part protruding outward of the plug connector parallel to a lower surface of the base part.

Preferably, a plurality of second plug terminals electrically insulated from the first plug terminal are further included on either or both of the second wall portion and the fourth wall portion, wherein the plurality of second plug terminals are It is formed so as not to have a step with an adjacent upper surface of the second wall portion.

Preferably, the first plug terminal further includes a second arm portion disposed across the first wall portion and the second wall portion, wherein the second arm portion comprises a second mounting portion extending along a lower surface of the base portion. include

Preferably, the first plug terminal further includes a third arm portion disposed across the first wall portion and the fourth wall portion, wherein the third arm portion comprises a third mounting portion extending along a lower surface of the base portion. include

Preferably, a cutout portion is formed at a lower end of the third extension portion, and when the plug connector is viewed from above, the third extension portion is connected to the first arm portion through a first bent portion, and the third extension portion is connected to the first arm portion through a first bent portion. The extension part is connected to the second arm part through the second bent part.

According to embodiments of the technical idea of the present invention, at least the following effects are provided.

In addition, by forming the first mold part 100 by insert molding, the gap between the mold and the terminal is eliminated, and at the same time, by utilizing a stepped structure, the probability and number of times that the mold surface touches the power terminal in the vicinity of the power terminal is reduced. This reduces mold friction and crushing (burr, etc.).

In the plug connector according to the embodiment, terminal supporting force is enhanced. The high terminal supporting force means that the plug terminal is not easily separated from the mold part after mounting. After the plug connector and the socket connector are mounted on the board and coupled to each other, the power terminal is separated when one connector is removed (ie, connectors are separated). can be alleviated.

Also, solder wicking is prevented. The mounting unit is mounted by being attached to the board by soldering. During this soldering process, there is a concern that liquid solder may climb up the mounting unit due to a phenomenon in which liquid penetrates into a narrow gap, that is, osmotic pressure. However, in the structure of the present invention, for example, since the third extension part 240 is buried in the mold part and is not exposed, the possibility of soldering is reduced compared to the case where it is exposed.

In addition, by forming the first mold part 100 by insert molding, the gap between the mold and the terminal is eliminated, and even by this, the possibility of soldering can be further reduced.

On the other hand, according to the structure of the present invention, the probability and number of times that the mold surface touches the power terminal in the vicinity of the power terminal is reduced, and consequently, chafing and crushing (burr, etc.) of the mold are reduced.

Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a view showing a plug connector 10 and a socket connector 20 according to the present invention.
2a, 2b and 2c are perspective views for explaining a plug connector 10 according to an embodiment of the technical idea of the present invention.
FIG. 3 is a view showing the arrangement of the terminals 200 and 300 when the first mold part 100 is excluded from the perspective view of FIG. 2A.
FIG. 4A is an enlarged view of the lower left corner (near the first wall portion 120) of FIG. 2A, and FIG. 4B is a view showing a view excluding the first mold portion 100 in FIG. 4A.
FIG. 5A is a view showing the vicinity of the third wall portion 140 of the plug connector 10, and FIG. 5B is a view showing the AA′ section of FIG. 5A.
6A and 6B are partial sectional views of the plug connector 10 and the socket connector 20 in the vicinity of the third wall portion 140 .
7A and 7B show the first extension part 220 (of the first arm part 210), the second extension part 230, etc. (of the first mold part 100) in the vicinity of the third wall part 140. It is a figure showing the step difference between the 3rd wall parts 140.
FIG. 8 is a view illustrating a case in which the plug connector 10 and the socket connector 20 are coupled with respect to the cross section of FIG. 5B.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

A component is said to be "connected to" or "coupled to" another component when it is directly connected or coupled to the other component or through another component in between. include all cases. On the other hand, when one component is referred to as “directly connected to” or “directly coupled to” another component, it indicates that another component is not intervened. “And/or” includes each and every combination of one or more of the recited items.

When an element is referred to as being “on” or “on” another element, it includes not only directly on the other element, but also a case in which another element is interposed therebetween. On the other hand, when an element is referred to as “directly on” or “directly on” another element, it indicates that another element is not intervened. The spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe components and their correlations with other components. Spatially relative terms should be understood as encompassing different orientations of elements in use or operation in addition to the orientations shown in the figures.

For example, when flipping elements shown in the figures, elements described as “below” or “beneath” other elements may be placed “above” other elements. . Thus, the exemplary term “below” may include directions of both below and above. Elements may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprises" and/or "comprising" means that a stated component, step, operation, and/or element is present in the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

Although first, second, etc. are used to describe various constituent elements, these constituent elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may also be the second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

1 is a view showing a plug connector 10 and a socket connector 20 according to the present invention.

A plug connector 10 is shown in the upper part of FIG. 1 , and a socket connector 20 is shown in the lower part of FIG. 1 .

The plug connector 10 includes a first mold part 100 , a first plug terminal 200 , a second plug terminal 300 , and the like.

In the plug connector 10 shown in FIG. 1, the first plug terminal 200 and the second plug terminal 300 face upward for the convenience of structural confirmation, but during actual coupling, the plug connector 10 shown in FIG. (As shown in FIG. 2C ) After inverting the first plug terminal 200 and the second plug terminal 300 downward, they are coupled to the socket connector 20 shown at the bottom of FIG. 1 .

A description of the socket connector 20 for such coupling is as follows.

The socket connector 20 may include, for example, a second mold part 400 , a first socket terminal 500 and a second socket terminal 600 .

The second mold part 400 may have a shape accommodating the first mold part 100 . For example, the first mold part 100 may have a shape inserted into a space defined by the second mold part 400 .

The second mold part 400 may be formed of an insulator including resin and epoxy, but is not limited thereto.

The first socket terminal 500 and the second socket terminal 600 may be disposed on the wall of the second mold part 400 . Also, a plurality of first socket terminals 500 and a plurality of second socket terminals 600 may be disposed on the wall portion of the second mold part 400 .

The first socket terminal 500 and the second socket terminal 600 may include a conductive material.

For example, the first socket terminal 500 and the second socket terminal 600 may be formed of a metal material including copper, but are not limited thereto.

Accordingly, when the plug connector 10 is fastened to the socket connector 20, the first plug terminal 200 and the second plug terminal 300 form the first socket terminal 500 and the second socket terminal 600 can be electrically connected with

For example, the first plug terminal 200 may be electrically connected to the first socket terminal 500 and the second plug terminal 300 may be electrically connected to the second socket terminal 600 . For example, when the first plug terminal 200 is a power terminal, the first socket terminal 500 may input/output a power electrical signal. For example, when the second plug terminal 300 is a signal terminal, the second socket terminal 600 may input/output data electrical signals.

The socket connector 20 may be an exemplary socket connector into which the plug connector 10 according to one embodiment is fastened. The socket connector 20 may include, for example, a second mold part 400 , a first socket terminal 500 and a second socket terminal 600 .

The second mold part 400 may have a shape accommodating the first mold part 100 . For example, the first mold part 100 may have a shape inserted into a space defined by the second mold part 400 .

The second mold part 400 may be formed of an insulator including resin and epoxy, but is not limited thereto.

The first socket terminal 500 and the second socket terminal 600 may be disposed on the wall of the second mold part 400 . Also, a plurality of first socket terminals 500 and a plurality of second socket terminals 600 may be disposed on the wall portion of the second mold part 400 .

In the socket connector 20 of FIG. 1 , the first socket terminals 500 at both ends cover the plastic housing (the second mold part 400). That is, there is no part where the plastic housing covers the first socket terminal 500, and the first socket terminal 500 covers the plastic housing and the first socket terminal 500 is exposed. As a conventional example, there is a case where a part of the first socket terminal 500 (for example, a part corresponding to a corner portion of the socket connector 20) is covered with a plastic housing. Since the metal of the whole is covered, cracking of the housing is prevented and an easier coupling operation is possible.

On the other hand, as an example, the signal terminal as the second plug terminal 300 and the second socket terminal 600 may be composed of 32 PINs allowing a current of 0.3A, and the first plug terminal 200 and the first As the socket terminal 500, the power supply terminal can allow a current of 5A. The first mold part 100 of the plug connector 10 and/or the second mold part 400 of the socket connector 20 are preferably made of a plastic material, and may be, for example, liquid crystal polymer (LCP). The first plug terminal 200 and the second plug terminal 300 of the plug connector 10 and/or the first socket terminal 500 and the second socket terminal 600 of the socket connector 20 are made of metal. Preferably, for example, copper alloy may be gold-plated (nickel under layer).

2a, 2b and 2c are perspective views for explaining a plug connector 10 according to an embodiment of the technical idea of the present invention.

In FIG. 2A , the plug connector 10 includes a first mold part 100 , a first plug terminal 200 and a second plug terminal 300 .

The first mold part 100 may include a base part 110 and first to fourth wall parts 120 , 130 , 140 , and 150 . The first to fourth wall portions 120 , 130 , 140 , and 150 may each protrude from the upper surface of the base portion 110 .

Specifically, the first wall portion 120 may extend in the first direction (X) on the base portion 110 . The second wall portion 130 may extend in a second direction Y crossing the first direction X on the base portion 110 . The third wall portion 140 may face the first wall portion 120 on the base portion 110 . The fourth wall portion 150 may face the second wall portion 130 on the base portion 110 . At this time, the second wall portion 130 may be connected to one side of the first wall portion 120 and one side of the third wall portion 140 . In addition, the fourth wall portion 150 may be connected to the other side of the first wall portion 120 and the other side of the third wall portion 140 . Accordingly, the base portion 110 and the first to fourth wall portions 120 , 130 , 140 , and 150 may be connected to each other to form the first mold portion 100 .

The first to fourth wall portions 120, 130, 140, and 150 may define a space in which the plug connector 10 is fastened to the socket connector (20 in FIG. 1). For example, the first to fourth wall parts 120 , 130 , 140 , and 150 may be formed along the edge of the upper surface of the base part 110 . Accordingly, a space may be formed on the central portion of the upper surface of the base portion 110, and a part of the socket connector (20 in FIG. 1) is inserted into this space, and the plug connector 10 and the socket connector (20 in FIG. 1) are inserted. ) can be concluded.

The first mold part 100 may be formed of an insulator including resin and epoxy, but is not limited thereto.

The first plug terminal 200 may be disposed on the first wall part 120 and/or the third wall part 140 of the first mold part 100 . For convenience of description, hereinafter, the first plug terminal 200 disposed on the first wall portion 120 will be mainly described. However, the other second plug terminals 200 disposed on the third wall portion 140 may also have the same structure only in a symmetrical direction.

FIG. 2B is the same as FIG. 2A , but is a view showing a shade and color display in consideration of clear distinction and visibility between parts.

FIG. 2C is a view showing the plug connector 10 shown in FIG. 2A by inverting it upside down.

At the bottom left of the drawing, it is shown that the first plug terminals 200 are mounted on the board at three places, and at the top right of the drawing, it is shown that the other first plug terminals 200 are mounted on the board at three places. . One feature of the present invention is that the mounting portion has many places compared to the illustrative conventional examples. This helps to strengthen the adhesion with the PCB board.

FIG. 3 is a view showing the arrangement of the terminals 200 and 300 when the first mold part 100 is excluded from the perspective view of FIG. 2A.

As shown in FIG. 3, one first plug terminal 200 is disposed at both ends, and a plurality (eg, 32) second plug terminals 300 are disposed between them.

The first plug terminal 200 may be, for example, a power terminal, and the second plug terminal 300 may be, for example, a signal terminal.

FIG. 4A is an enlarged view of the lower left corner (near the first wall portion 120) of FIG. 2A, and FIG. 4B is a view showing a view excluding the first mold portion 100 in FIG. 4A.

4A shows a first wall portion 120 of the first mold portion 100, and a portion of the base portion 110, a portion of the second wall portion 130, and a portion of the fourth wall portion 150 are shown.

In the description of FIGS. 2A, 2C, and 3, the first plug terminal 200 is briefly indicated, but as shown in FIGS. 4A and 4B, in detail, the first plug terminal 200 is a first arm portion 210 connected to each other. ), the second arm unit 250 and the third arm unit 260 may be included. For example, one metal plate may be cut and bent to obtain the first plug terminal 200 formed while the first arm portion 210, the second arm portion 250, and the third arm portion 260 are connected to each other. . However, this is just one example, and an embodiment in which the plurality of arm parts 210, 250, and 260 are not connected to one another will be possible as needed.

The first arm portion 210 of the first plug terminal 200 may be disposed on the first wall portion 120 of the first mold portion 100 . The first arm part 210 may include a first extension part 220 , a second extension part 230 and a third extension part 240 .

The first extension part 220 of the first arm part 210 may extend along the upper surface of the first wall part 120 . For example, the first extension part 220 may extend in the second direction (Y) on the upper surface of the first wall part 120 . Accordingly, the first extension part 220 may cover a part of the upper surface of the first wall part 120 .

The second extension part 230 of the first arm part 210 may extend from one end of the first extension part 220 and protrude from the lower surface of the base part 110 . For example, one end of the second extension 230 (eg, upper side in FIG. 5B) extends from one end of the first extension 220 (eg, left side in FIG. 5B), and the second extension 230 The other end (eg, the lower side of FIG. 5B ) may protrude from the lower surface of the base portion 110 . In addition, a part of the second extension part 230 may be introduced into the first wall part 120 . The second extension part 230 of the first arm part 210 of the plug connector 10 and the first extension part 220 are connected to the lower end of the first socket terminal 500 of the socket connector 20 in the final state of connector coupling. It may be in contact with the upper surface (see Figs. 1 and 8), or it may not be in contact with a slight tolerance,

Although only the vicinity of the first wall portion 120 is shown in FIGS. 4A and 4B, as in FIG. 1, the vicinity of the third wall portion 140 may also be symmetrically formed.

4A and 4B , the second arm portion 250 of the first plug terminal 200 may be disposed over the first wall portion 120 and the second wall portion 130 of the first mold portion 100. . For example, as shown in FIGS. 4A and 4B , the second arm portion 250 may have a shape surrounding the upper portion of the second wall portion 130 .

The second extension part 230 of the first arm part 210 meets the first mounting part 230m from the lower side. It is preferable that it is integrally formed and bent (bent). The member shown below the first mounting part 230m is a part of the board assuming that it is mounted on the board.

In one embodiment, the second arm unit 250 may include a second mounting unit 250m.

The second mounting part 250m may extend along the lower surface of the base part 110 . The second mounting unit 250m may mount the plug connector 10 on a board (not shown) or the like by a method such as soldering.

The third arm portion 260 of the first plug terminal 200 may be disposed across the first wall portion 120 and the fourth wall portion 150 of the first mold portion 100 . For example, as shown in FIGS. 4A and 4B , the third arm portion 260 may have a shape surrounding the upper portion of the fourth wall portion 150 .

In one embodiment, the third arm unit 260 may include a third mounting unit 260m.

The third mounting part 260m may extend along the lower surface of the base part 110 . The third mounting unit 260m may mount the plug connector 10 on a board or the like by a method such as soldering.

Members shown below the second mounting unit 250m and the third mounting unit 260m are part of the board assuming that they are mounted on the board. The member shown under the mounting portion of the second plug terminal is similarly shown as a part of the board.

The first plug terminal 200 according to an embodiment includes three mounting parts to prevent the plug connector 10 from being easily separated from a substrate or the like. For example, as shown in FIGS. 4A and 4B , the first to third mounting parts 230m, 250m, and 260m may be exposed from the lower surface of the base part 110 . The first plug terminal 200 including three mounting parts can easily prevent the plug connector from being easily separated from the board or the like by expanding the area of the part where the plug connector is mounted on the board or the like.

The first plug terminal 200 may include a conductive material. For example, the first plug terminal 200 may be formed of a metal material including copper or the like, but is not limited thereto.

In one embodiment, the first plug terminal 200 may be a power terminal. That is, the first plug terminal 200 may input/output a power electrical signal to supply power to a substrate or the like on which the plug connector 10 is mounted. However, the technical spirit of the present invention is not limited thereto, and the first plug terminal 200 may not input/output power electrical signals.

The second plug terminal 300 may be disposed on the second wall part 130 and/or the fourth wall part 150 of the first mold part 100 . However, the second plug terminal 300 may be electrically insulated from the first plug terminal 200 .

A plurality of second plug terminals 300 may be disposed on the second wall portion 130 and/or the fourth wall portion 150 . For example, as shown in FIG. 1 , the plurality of second plug terminals 300 may be disposed across the second wall portion 130 and the fourth wall portion 150 .

The second plug terminal 300 may include a conductive material. For example, the second plug terminal 300 may be formed of a metal material including copper or the like, but is not limited thereto.

In one embodiment, the second plug terminal 300 may be a signal terminal. That is, the second plug terminal 300 may input/output a data electrical signal to transfer data to an electrical element of a board on which the plug connector 10 is mounted. However, the plurality of second plug terminals 300 do not all input/output the same data electrical signals, and the plurality of second plug terminals 300 may input/output different types of data electrical signals as needed.

Meanwhile, in FIG. 4B , a cutout 240g is formed at the lower end of the third extension 240 . For example, the cutout 240g is a parallelogram with a narrow top and a wide bottom. When the plug connector 10 is viewed from the top, the third extension 240 of the first arm 210 is connected to the second arm 250 through a first bent portion (bending portion), , The third extension part 240 is connected to the third arm part through a second bent part (bending part). In the example of FIG. 4B , the first plug terminal 200 (that is, the first arm portion 210) having a U-shape (see FIG. 3) when viewed from the top is formed by bending one metal piece to form a first bent portion and a second bent portion. , the second arm portion 250 and the third arm portion 260) can be obtained. At this time, the cutout 240g formed at the lower end of the third extension 240 is used for bending (bending) by inserting a tool (core). That is, if the cutout 240g is not present, it may be difficult to form the first bent portion and the second bent portion. This cutout 240g can be used not only for sideways bending but also for downward bending.

FIG. 5A is a view showing the vicinity of the third wall portion 140 of the plug connector 10, and FIG. 5B is a view showing the AA' section of FIG. 5A.

As described above, the first arm portion 210 may include a first extension portion 220 , a second extension portion 230 , and a third extension portion 240 .

As shown in FIG. 5B , when looking at the A-A' cross section of the first arm portion 210 of the first plug terminal 200, there is a first extension portion 220 having a substantially semicircular shape, and the first extension portion 220 ) The third extension part 240 extends downward from one end thereof, and the second extension part 230 extends downward from the other end of the first extension part 220, and the second extension part 230 ) is bent near the bottom surface to form a mounting portion 230m.

In the cross section of the first arm portion 210 of the first plug terminal 200 shown in FIG. 5B, the first arm portion 210 is coupled to the third wall portion 140, and a portion of the first arm portion 210 is coupled to the third wall portion 140. It is covered and some are exposed. For example, in FIG. 5B , the substantially semicircular first extension part 220 has its outer side exposed, and its inner side is filled with the third wall part 140 which is a part of the first mold part 100 . In addition, in FIG. 5B , the outside of the third extension part 240 is exposed, and the inside thereof is filled with the third wall part 140 which is a part of the first mold part 100 . Meanwhile, it can be seen that there is little or no portion of the second extension part 230 that is exposed to the outside and is visible.

5A and 5B, the partially exposed first arm portion 210 is the upper end of the second extension portion 230 (a portion where the first extension portion 220 and the second extension portion 230 meet). ) to the lower end of the second extension part 230 (the part where the second extension part 230 is bent on the bottom surface) is buried in the third wall part 140. In FIG. 5B, the distance between the inner wall surface of the third wall portion 140 and the second extension portion 230 increases as you go down, and is separated by D1 at a certain point on the upper part and D2 at another point lower than that. It is shown that it is separated by (however, D2>D1).

That is, in the example shown in FIG. 5B , the second extension portion 230 of the first arm portion 210 of the first plug terminal 200 obliquely extends to the third wall portion 140 of the first mold portion 100. It is a structure that is buried inside. Considering the strength according to the thickness of D1 and D2 and securing a sufficient length of the mounting part (230m), the angle of the oblique line may be approximately 5 to 40 degrees, preferably 10 to 30 degrees, and more preferably 15 to 20 degrees. there is.

5A and 5B show the first plug terminal 200 near the third wall portion 140, but the same applies to other first plug terminals 200 near the first wall portion 120. Of course you can.

One example of an advantage of this structure is that the terminal holding force is enhanced. The fact that the terminal supporting force is high means that the first plug terminal 200 is not easily separated from the first mold part 100 after mounting. After the plug connector 10 and/or the socket connector 20 are mounted on a board and the connectors 10 and 20 are coupled to each other, when the connectors 10 and 20 are removed, the power terminal (eg, the first plug terminal ( 200)) can also be alleviated by strengthening the support/adhesive force of the mold and the terminal.

In addition, another example of an advantage of this structure is that solder wick is prevented. In FIG. 5B, the mounting unit 230m is mounted by being attached to the board by soldering. During this soldering process, liquid penetrates into a narrow gap, that is, there is a concern that liquid solder will climb up the mounting unit due to osmotic pressure. there is However, in the structure of FIG. 5B , the part extending from the mounting part 230m and going up (for example, the second extension part 230) among the first arm parts 210 is the third wall part 140 of the first mold part 100. ) and is not exposed, so the possibility of lead rising is reduced compared to the exposed case. And, as will be described later, in addition to this structure, the third wall portion 140 (moreover, the first mold portion 100) is formed by insert molding, thereby forming the third wall portion 140 and the first arm portion 210. ), and the possibility of lead oreum can be further reduced by that.

On the other hand, in FIG. 5B, the longitudinal section of the first extension part 220 is an approximate semicircle open at the bottom, but other shapes are also possible. there is.

6A and 6B are partial sectional views of the plug connector 10 and the socket connector 20 in the vicinity of the third wall portion 140 .

6A shows a cross section near the second plug terminal 300 (eg signal terminal) and a cross section near the second socket terminal 600 (eg signal terminal).

FIG. 6B shows a cross section near the first plug terminal 200 (eg power terminal) and a cross section near the first socket terminal 500 (eg signal terminal).

As can be seen in the cross-sections of FIGS. 6A and 6B , the first mold part 100 surrounds at least a portion of the first plug terminal 200 and the second plug terminal 300, and the second mold part 400 ) surrounds at least a portion of the first socket terminal 500 and the second socket terminal 600 . In this case, the first mold part 100 and/or the second mold part 400 may be formed by insert molding (insert molding). Although there are several advantages of forming by insert molding, for example, lead-up is prevented, and in particular, the obliquely descending structure of the second extension part 230 described above with reference to FIG. 5B (ie, gradually According to the structure in which D2>D1), such lead rising can be prevented more reliably. Of course, the advantages of the oblique descending structure are not limited to preventing the lead from rising, and may also include preventing the power terminal from being separated when the product (connector) is removed and strengthening the holding force.

7A and 7B show the first extension part 220 (of the first arm part 210), the second extension part 230, etc. (of the first mold part 100) in the vicinity of the third wall part 140. It is a figure showing the step difference between the 3rd wall parts 140.

FIG. 7B is an enlarged view of a portion (near the third wall portion 140) indicated by a rectangle in the plug connector 10 of FIG. 7A.

As shown in FIG. 7B , there is a contact portion between the exposed portion of the first arm portion 210 and the third wall portion 140 . The first arm portion 210 is made of, for example, a metal material, and the third wall portion 140 is made of, for example, a plastic material. As shown in FIG. 7B , in the first extension part 220 among the exposed parts of the first arm part 210, the upper surface of the first extension part 220 is the upper part of the adjacent third wall part 140. It is located higher than the side. In FIG. 7B, three illustratively selected locations of the first arm portion 210 are indicated as E1, E2, and E3. The E1 point is a portion corresponding to the first extension portion 220, and the E2 point is approximately It is a part where the first extension part 220 and the third extension part 240 meet, and the E3 point is a part corresponding to the third extension part 240 . At points E1, E2, and E3, the exposed surface of the first arm part 210 (ie, the exposed surface of the first extension part 220) is more protruded outward than the exposed surface of the third wall part 140. it is desirable Even if, among points E1, E2, and E3, the exposed surface of the third wall part 140 and the exposed surface of the first arm part 210 (that is, the exposed surface of the first extension part 220) are continuous at the same height. Even if the surface is formed, the exposed surface of the first arm part 210 (ie, the exposed surface of the first extension part 220) compared to the exposed surface of the third wall part 140 at at least one of E1, E2, and E3 points. It is preferable that this further protrudes to the outside. For example, it is preferable that all or part of at least the first extension part 220 protrudes outwardly compared to the surface of the adjacent third wall part 140 . For example, in FIG. 7B, E1 protrudes from the adjacent third wall portion 140, and E2 protrudes from the adjacent third wall portion 140, but the amount of protrusion is less than E1, and E3 is adjacent to the third wall portion 140. It is almost the same surface as or is finely indented.

According to this structure, it is possible to make pre-contact between the metal parts, especially at the parts indicated by E1 and E2, in the case of fastening with the counterpart (ie, the socket connector 20).

If it is assumed that the exposed surface of the third wall portion 140 at the point E1 and the exposed surface at the point E1 are substantially the same height, rather than the structure as in the present invention, the first socket terminal 500 of the socket connector 20 The third wall portion 140 (that is, the first mold portion 100) adjacent to the first plug terminal 200 (not the first plug terminal 200) of the plug connector 10 may be contacted first. In this case, the problem of abrasion occurs due to the difference in strength between the members (see FIG. 8 described later).

However, according to the structure of the present invention, since the exposed surface of the third wall portion 140 at point E1 protrudes outward more than the exposed surface at point E1, the mold surface (ie, the exposed surface of the third wall portion 140) is made of metal. (That is, the probability and number of times of contact with the first socket terminal 500 of the socket connector 20 are reduced, and consequently, chafing and crushing (burr, etc.) of the mold are reduced.

In order to form such a step according to the present invention, as shown in FIGS. 6A and 6B , when forming the first mold part 100 and/or the second mold part 400, it is preferable to form it by an insert molding method. do. It is not easy to form such a step and bring the third wall portion 140 and the first arm portion 120 into close contact with PG molding. Discharge molding can also be considered, but it is not easy to apply because the precision of processing is low.

Incidentally, these E1, E2, and E3 will be able to confirm their corresponding locations in FIG. 4A. The first mold portion 100 (particularly, the first wall portion 120 or the third wall portion 140 or the like) is formed by performing insert molding on the first plug terminal 200 . If the insert molding (insert molding) method for the first plug terminal 200 is not used, it may be difficult to form a step having an appropriate dimension considering the small size of the connector of the present invention.

The first extension part 220 has a step difference between the adjacent top surface of the first wall part 120 (or the third wall part 140) and at least a part of the section, and the step difference is formed so that the first extension part 220 protrudes further. do. The stepped portions are, for example, points E1, E2, and E3 in FIG. 7B.

Regarding E1 and its vicinity, the section where the step exists may be from the vertex of the first extension 220 to the point where the first extension 220 and the second extension 230 meet. .

Regarding E2 and its vicinity, the section where the step exists further includes from the apex of the first extension part 220 to the point where the first extension part 220 and the third extension part 240 meet. can do.

Regarding E3 and its vicinity, the section where the step exists is from one end of the third extension 240, which is the point where the first extension 220 and the third extension 240 meet, to the third extension 240. ) It may further include up to the other end (ie, the lowermost part of the third extension part 240).

The need for steps in E1 and E2 will be greater than the need for steps in E3. In addition, considering the possibility of collision during coupling, it may be desirable that the step of E1 is larger than that of E2.

With this configuration, the mold surface (that is, the exposed surface of the first wall portion 120 or the third wall portion 140 of the first mold portion 100) is made of metal (that is, the first socket of the socket connector 20). The probability and number of times of contact with the terminal 500 are reduced, and consequently, chafing and crushing (burr, etc.) of the mold are reduced.

In press-fit molding, even if it has a stepped external shape like the present invention, the same effect as the present invention is not exhibited. The reason for this is that the press-fitting structure inserts the terminal into the mold, and at this time, a gap (gaps) inevitably exists between the terminal and the mold. Then, even if the terminals of the metal part seem to protrude more like the step of the present invention on the outside, when they are actually pressed during the process of coupling the plug connector and the socket connector, they are pressed by the distance, so the metal part actually protrudes more than the mold part during coupling. It's very likely not. Therefore, the step difference in the present invention exhibits its effect (prevention of unwanted mold and metal contact during the coupling process to generate mold debris) when it is assumed that insert molding is performed for at least the first plug terminal.

For reference, when the second plug terminal 300 is a signal terminal, the second plug terminal 300 does not have to have the aforementioned level difference. Since the second plug terminal 200 and the second socket terminal 500 as signal terminals mainly function as locks, they are somewhat different from the case of the first plug terminal 200 in terms of wear and tear during coupling. can be different.

FIG. 8 is a view illustrating a case in which the plug connector 10 and the socket connector 20 are coupled with respect to the cross section of FIG. 5B.

In FIG. 5B, the first extension part 220 is upward and the mounting part 230m is downward, but in FIG. 8, the member of FIG. 5B is vertically reversed so that the first extension part 220 faces downward and the mounting part 230m ) is coupled to the socket connector 20 while facing upward.

Considering that the size of the connectors 10 and 20 of the present invention is very small, the plug connector 10 and the socket connector 20 start to be coupled at a slightly displaced position as shown in FIG. will often do. In this case, since the plug connector 10 of the present invention has a step difference between the metal part of the second plug terminal 200 and the plastic part of the third wall part 140, and the metal part protrudes further, the case shown in FIG. 8 Even though the plastic part of the third wall part 140 does not contact the socket connector 20 first, the metal part of the second plug terminal 200 (eg, the exposed part of the first extension part 220) first contacts the socket connector Contact (20). Therefore, the occurrence of chafing and burr of the mold is reduced, and self-alignment is also possible to some extent.

Assuming a state in which the plug connector 10 and the socket connector 20 are completely coupled after the process of FIG. 8, for example, only the first extension part 220 is the first socket terminal 500 of the socket connector 20. ) and the second extension part 230 and the third extension part 240 may not contact the left and right sides of the first socket terminal 500 . Of course, this is an example, and in the completed state of coupling, by putting a fine tolerance between the first extension part 220 and the lower end of the first socket terminal 500 of the socket connector 20 to prevent contact, An embodiment in which the first extension part 220, the second extension part 230, and the third extension part 240 do not contact the first socket terminal 500 is also possible.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments and can be manufactured in a variety of different forms, and those skilled in the art in the art to which the present invention belongs A person will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

10: plug connector
20: socket connector
100: first mold part
110: base
120, 130, 140, 150: wall part
200: first plug terminal
210, 250, 260: arm part
220, 230, 240: extension
230 m: first mounting part
300: second plug terminal
E1, E2, E3: step difference
400: second mold part
500: first socket terminal
600: second socket terminal

Claims (11)

A plug connector coupled to a socket connector,
A base portion, a first wall portion protruding from the top surface of the base portion, a second wall portion protruding from the top surface of the base portion and intersecting the first wall portion, and protruding from the top surface of the base portion and intersecting the second wall portion, the first wall portion a mold unit including a third wall portion facing the base portion and a fourth wall portion protruding from an upper surface of the base portion, intersecting the first and third wall portions, and facing the second wall portion; and
A first plug terminal including a first arm portion
including,
The first arm portion includes a first extension portion extending while covering at least a portion of an upper portion of the first wall portion, and a second extension portion extending from one end of the first extension portion and protruding from a lower surface of the base portion,
including,
The mold part is formed by insert molding with respect to the first plug terminal, so that there is no gap between the lower surface of the first extension part and the mold part,
The first extension portion has a step difference between an upper surface adjacent to the first wall portion and at least a portion of the section, and the step difference is formed such that the first extension portion further protrudes. According to claim 1,
The first extension portion is not embedded in the first wall portion,
At least a portion of the second extension is embedded in the first wall,
The plug connector of claim 1 , wherein the section in which the step is present is from an apex of the first extension to a point where the first extension and the second extension meet. According to claim 2,
The first arm part further includes a third extension part extending from the other end of the first extension part along an outer surface of the first wall part,
The section where the step exists further includes a point from a vertex of the first extension to a point where the first extension and the third extension meet. According to claim 3,
The section where the step exists further includes a point from one end of the third extension, which is a point where the first extension and the third extension meet, to the other end of the third extension. According to claim 2,
When the plug connector is viewed from the top, in a longitudinal cross section of a location where the first extension portion and the top surface of the first wall portion are adjacent, the cross section of the first extension portion is a part of a circle and protrudes from the top surface of the first wall portion. plug connector. According to claim 2,
When the plug connector is viewed from the top, a cross section of the first extension portion has a U-shape with an open bottom and protrudes beyond the top surface of the first wall portion in a longitudinal section at a location where the first extension portion and the top surface of the first wall portion are adjacent. plug connector. According to claim 2,
The second extension part further includes a first mounting part protruding outward of the plug connector parallel to a lower surface of the base part. According to claim 1,
Further comprising a plurality of second plug terminals electrically insulated from the first plug terminal on either or both of the second wall portion and the fourth wall portion,
The plurality of second plug terminals are formed so as not to have a step with an adjacent upper surface of the second wall portion. According to claim 1,
The first plug terminal further includes a second arm portion disposed across the first wall portion and the second wall portion,
The second arm portion includes a second mounting portion extending along a lower surface of the base portion. According to claim 9,
The first plug terminal further includes a third arm portion disposed across the first wall portion and the fourth wall portion,
The third arm portion includes a third mounting portion extending along a lower surface of the base portion. According to claim 9,
The first arm part further includes a third extension part extending from the other end of the first extension part along an outer surface of the first wall part,
A cutout is formed at the lower end of the third extension,
When the plug connector is viewed from the top, the third extension portion is connected to the first arm portion through a first bent portion, and the third extension portion is connected to the second arm portion through a second bent portion. .

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