JP2009129731A - Electric connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connector in which bending strength of a narrow and long insulator is reinforced and performance of EMI countermeasures is improved. <P>SOLUTION: The electric connector is composed of an insulator 2, a ground bar shell 3 which is integrally formed with the insulator 2, a plurality of contacts 4 which are installed in horizontal direction on the insulator 2 and are integrally formed, and a plug shell 5 which is covered and fixed on the upper side of the insulator 2 and is electrically conducted with the ground bar shell. The ground bar shell 3 has its rear part 3b formed bent in a uniform L-shape cross-section in horizontal direction to the nearly horizontal shell body and, further, has in front a reinforced extension part 3d formed projecting slanted downward. A caulking part 5c is formed at both ends in horizontal direction of the plug shell, and the ground bar shell 3 and the plug shell 5 are soldered at a plurality of places in horizontal direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electrical connector to which an ultrafine coaxial cable for high-speed transmission is connected, and more particularly to a ground connection structure of an electrical connector used for a mobile phone, a PDA, a digital camera, and the like.

  Conventionally, as shown in FIG. 13, the plug electrical connector 15 with the coaxial cable 16 includes an insulator 17 made of synthetic resin, a plurality of contacts 18 provided alongside the insulator 17, the contacts 18 and the contacts 18. As a measure against EMI of the coaxial cable 16 connected to the contact 18, there is a metal shell 19 (19a, 19b) provided so as to surround the outer periphery of the insulator 17. The shell 19 includes an upper plug shell 19a and a ground bar shell 19b which is a lower shell.

As shown in FIG. 13B, the ground bar shell 19b is integrally formed with the insulator 17, and is a plate-like body having a substantially flat cross section as shown (see Patent Document 1). . As a cross-sectional shape of the ground bar shell, a plug electrical connector 15a having an inverted L-shaped ground bar shell 19b as shown in FIG. 14 is also known (see Non-Patent Document 1).
JP 2006-221863 A Design Registration No. 1298619

  However, in the conventional electrical connector, even if the ground bar is a flat plate-like body and is integrally formed with an elongated insulator, the strength is insufficient when a force is applied in a direction perpendicular to the longitudinal direction. In addition, in the connection structure between the upper and lower shells or the method of fixing the upper shell to the insulator, there is a possibility that it cannot be said that the electrical connection structure and the mechanical connection structure are strong. Furthermore, it is necessary to improve performance in the EMI countermeasures by the upper and lower shells. The electrical connector according to the present invention has been proposed in order to solve such a problem.

  The gist of the electrical connector according to the present invention for solving the above-described problems and achieving the object is to provide an insulator made of synthetic resin, a ground bar shell integrally formed with the insulator, and a lateral direction of the insulator. An electrical connector comprising: a plurality of contacts that are integrally formed together; and a plug shell that covers and is fixed to the upper side of the insulator and that is electrically connected to the ground bar shell. The bar shell is formed by bending the rear part of the substantially horizontal shell body part into a uniform L-shaped cross section in the lateral direction, and the front part alternately and obliquely protrudes downward in the long and short directions. The plug shell is formed with a caulking portion that is caulked so as to sandwich the end portion of the shell main body portion of the ground bar shell and the end portion of the insulator at both lateral ends of the plug shell. And Ndobasheru said plug shell, is that it is soldered at a plurality of positions in the lateral direction.

Further, at both ends of the ground bar shell, there are ground terminal portions extending in an inverted L shape toward the mating mating side, and the contact terminal portions of the mating mating female contacts are provided on the ground terminal portion. It is that the recessed part along the fitting direction is provided in the location which contact | abuts.
Further, a central ground terminal portion that extends in the front direction perpendicular to the lateral direction and is soldered and electrically connected to the upper portion of the male contact for ground is provided at the central portion in the lateral direction of the ground bar shell. In addition, the thickness of the central ground terminal portion is smaller than the thickness of the shell.

  According to the electrical connector of the present invention, the ground bar shell is integrally locked to the insulator of the connector, and the rear portion of the ground bar shell is transverse to the substantially horizontal shell body. Since it is formed by being bent into a uniform L-shaped cross section, the strength of the electrical connector having an elongated casing is improved.

  Further, the front part of the ground bar shell is formed with a reinforcing extension part that protrudes obliquely downward alternately in the long and short directions, and the end part of the shell body part of the ground bar shell is formed at both lateral ends of the plug shell. And the end portion of the insulator are formed, and the ground bar shell and the plug shell are soldered at a plurality of positions in the lateral direction, so that the upper and lower shells are firmly fixed to each other. As a result, the connector strength is improved.

Further, the plug shell and the ground bar shell are soldered and conducted, and further, ground terminal portions are provided at both ends of the ground bar shell, and a center ground terminal portion and a ground terminal contact are provided. Therefore, the performance of EMI countermeasures is improved. In addition, the ground terminal portion is provided with a recess along the fitting direction at a position where the contact terminal portion of the female contact on the mating mating side contacts, so that the contact with the contact is ensured.
Since the thickness of the central ground terminal is smaller than the thickness of the shell, there is no need to provide irregularities on the heat chip used in the soldering process, and heat is evenly transmitted to the central conductor of the coaxial cable. As a result, it is easy and easy to determine the soldering conditions.

  The electrical connector 1 according to the present invention is an electrical connector for a plug with a micro coaxial cable 10 as shown in FIGS. The electrical connector 1 is, for example, fitted into a receptacle electrical connector 12 surface-mounted on a printed circuit board 11 in a mobile phone or the like by vertical fitting.

  As shown in FIGS. 2 to 3, the electrical connector 1 includes an insulator 2 made of synthetic resin, a metal ground bar shell 3 integrally formed with the insulator 2, and a lateral direction with respect to the insulator 2. And a plurality of male contacts 4 formed integrally therewith, and as shown in FIGS. 4 to 5, a superfine coaxial cable 10 is connected to the ground bar shell 3 and the contacts 4 as a heating device such as a pulse heater. After being soldered, the metal plug shell 5 is covered with and fixed to the upper side of the insulator 2 and electrically connected to the ground bar shell 3.

  As shown in FIGS. 2 to 3 and FIGS. 6 to 7, the shape of the ground bar shell 3 is a plate-like shell body that is substantially horizontal and long in the lateral direction when the electrical connector 1 is placed horizontally. The portion 3a and the rear portion 3b of the shell main body portion 3a are made to be uniform in the lateral direction, bent perpendicularly to the lower direction, and further bent horizontally and perpendicularly to the rear to form an L-shaped cross section. It is bent and formed.

  Further, as shown in FIGS. 7A to 7C, reinforcing extension portions 3d and 3e protruding obliquely downward alternately in the long and short directions are alternately and repeatedly formed in the front portion 3c in the lateral direction. ing. In this way, the connector is formed with respect to external force such as bending in the longitudinal direction by being embedded in the insulator 2 by the cooperation of the L-shaped rear portion 3b and the reinforcing extension portions 3d and 3e. Strength is improved.

  At both ends in the lateral direction of the ground bar shell 3, there are ground terminal portions 3f and 3g extending in an inverted L shape toward the mating mating side, and the ground terminal portions 3f and 3g include the mating mating side. A recessed portion 3h along the fitting direction is provided at a position where the contact terminal portion of the female contact comes into contact to ensure electrical connection.

  Further, a central ground terminal portion 3i that extends in the front direction perpendicular to the lateral direction and is soldered and electrically connected to the upper portion of the ground male contact 4a is provided at the central portion in the lateral direction of the ground bar shell 3. Is provided. The plate thickness t1 (= 0.05 mm) of the central ground terminal portion 3i is formed to be thinner than the plate thickness t (0.1 mm) of this shell, for example, by crushing.

  This is because, as shown in FIG. 5C, the plate thickness t1 is set to the same thickness as that of the central conductor 10a of the ultrafine coaxial cable 10 so that soldering is performed by pulse heat (not shown). This is because the heat chip 13 of pulse heat (see FIG. 5B) can be kept flat. Therefore, it is not necessary to provide unevenness on the heat chip 13, and heat is evenly transmitted to the central conductor 10a of the coaxial cable 10, so that it is easy and easy to determine the soldering conditions.

  As shown in FIGS. 8 to 9, the plug shell 5 is a horizontally long plate-like body, and is provided with reinforcing recesses 5 a along the lateral direction, at both lateral ends. As shown in FIG. 10B, caulking portions 5b and 5c are formed so that the end portion of the shell main body portion 3a of the ground bar shell 3 and the end portion of the insulator 2 are sandwiched.

  Further, along the horizontal direction, soldering projections 5d are formed by cutting down a part in a downward direction at a total of four locations. Among these, as shown in FIG. 10B, the ground bar shell 3 and the plug shell 5 are soldered at the two protruding portions 5d on the outer side in the lateral direction, and FIG. As shown in FIG. 2, the plug shell 5 and the ground bar 14 horizontally placed between the outer conductors (knitting wire) 10b of the ultrafine coaxial cable 10 are soldered at the two protrusions 5d on the inner side in the lateral direction. It is attached.

  Further, the rear portion of the plug shell 5 is folded back approximately 180 ° to form a bent portion 5e. And as for the front part, as shown in FIG.10 (C), as shown in FIG.10 (C), most of right and left along the horizontal direction is bent below 90 degree | times, and the front part is formed in the inverted L-shaped bending part 5f, Both ends are formed in a U-shaped bent portion 5g. The bent portion 5e and the bent portions 5f and 5g reinforce the bending strength and buckling strength of the elongated insulator 2.

  Thus, the ground bar shell 3 and the plug shell 5 are formed and attached to the insulator 2. The ground bar shell 3 is a mold and is integrally formed with the insulator 2, but the plug shell 5 contacts the micro coaxial cable 10 together with the heat chip 13 as shown in FIGS. 5 (A) and 5 (B). 4 and the ground bar shell 3 are placed rearward, soldered and fixed by pulse heat, and then covered from above. As shown in FIG. 10C, in consideration of differences in the diameters of the central conductor 10a, the protective layer, the outer conductor, and the outer sheath of the coaxial cable 10, a step is provided on the mounting surface of the insulator 2 so as to be coaxial. The central axis of the cable 10 is horizontal.

  Next, the front bent portions 5f and 5g of the plug shell 5 are hooked on the front protrusion 2a of the insulator 2, and as shown in FIGS. Solder to the top of the ground bar shell 3 and the ground bar 14 for the ultra-fine coaxial cable 10 at four locations, and fold the caulking portions 5b and 5c at both ends inward to secure the shell body 3a of the ground bar shell 3. By fixing, the insulator 2 is fixed.

  The electrical connector 1 formed in this way is used by being connected to a mating receptacle electrical connector 12 as shown in FIG. 1-B. As shown in FIG. 11A, a signal is transmitted to the circuit of the printed circuit board 11 by contact between the signal contact 4b and the contacts 12e and 12f on the receptacle side.

  On the other hand, in the electrical shield, a part of the mating shell 12a is in elastic contact with the bent portion 5f of the plug shell 5, and as shown in FIG. The portion 12b conducts to the ground pad of the printed circuit board 11. The ground bar shell 3 is also electrically connected from the ground contact 12c to the earth pad via the ground contact 4a from the central ground terminal portion 3i at the center thereof. Further, at both ends of the ground bar shell 3, as shown in FIG. 11C, the ground terminal portion 3g (on the opposite side, the ground terminal portion 3f) is electrically connected to the ground pad via the counterpart ground contact 12d. is doing. The contact end portion of the contact 12d is elastically dropped into the concave portion 3h of the ground terminal portion 3g to be surely contacted.

  Further, as shown in FIGS. 11A and 11D, the plug shell 5 has a bent portion 5e and a recessed portion 5a, and the ground bar shell 3 has a reinforcement extending portion 3d, 3e and an L-shape. Since there is the rear part 3b of the mold, the strength of the electrical connector 1 is improved by the reinforcing members of the shells 3 and 5.

  As an EMI countermeasure in the electrical connector 1, the upper side is surrounded by the plug shell 5, the lower side is surrounded by the ground bar shell 3, and a central ground terminal portion 3i is further provided in the lateral central portion. . When this is a case where there is no ground terminal at the center, and a magnetic field near 0.3 mm pitch is compared, when the signal input position is the end of the connector and there is a ground contact at the center, the maximum is 38.02 dBμV. In the case where there is no ground contact in the center, the maximum was 42.96 dBμV (the lower diagram in FIG. 12A).

  When a signal is input to the center of the connector, the maximum is 35.68 dBμV if there is a ground contact in the center (FIG. 12 (B) upper diagram), and the maximum if there is no ground contact in the center. It was 45.72 dBμV (the lower diagram in FIG. 12B). Thus, it can be seen that the provision of the ground terminal in the center is dramatically improved over the conventional example.

It is the perspective view (A) of the electrical connector 1 which concerns on this invention, a top view (B), and a front view (C). It is the perspective view (A) of the use condition of the electrical connector 1, and a side view (B). FIG. 2 is a plan view (A), a front view (B), a bottom view (C), and a side view (D) of the electrical connector 1 according to the present invention in which an insulator, a contact, and a ground bar shell 3 are integrally formed. 2A, a cross-sectional view along A-A (A), a cross-sectional view along B-B (B), a cross-sectional view along C-C-line (C), a DD line FIG. 6 is a cross-sectional view taken along the line XX, a cross-sectional view taken along the line X-X (E), a cross-sectional view taken along the line Y-Y (F), and a cross-sectional view taken along the line ZZ. It is explanatory drawing which shows a mode that the coaxial cable 10 is soldered to the electrical connector 1 of the state shown in FIG. It is explanatory drawing (A), (B) explaining the mode of the assembly performed by soldering in the electrical connector 1, and sectional drawing (C) in the center ground terminal part 3i. It is a rear view (A), a top view (B), left and right side views (C), (D), a front view (E), and a bottom view (F) of the ground bar shell 3 in the electrical connector 1. In FIG. 6B, a cross-sectional view along the line XX (A), a cross-sectional view along the line Y-Y (B), a cross-sectional view along the line ZZ (C), a WW line FIG. 5D is a step view along the line (D), and a cross-sectional view along the line VV (E). It is the top view (A), front view (B), bottom view (C), and rear view (D) of the plug shell 5 in the electrical connector 1. FIG. 8B is a cross-sectional view taken along line XX in FIG. 8A, a cross-sectional view taken along line BB, and a cross-sectional view taken at the bending portion (C). It is sectional drawing (A) of the edge part side in the horizontal direction of the electrical connector 1, (B). It is sectional drawing of the state which made electric connector 1 fit to the other party receptacle, Comprising: Sectional drawing (A), (D) in the position which has reinforcement extension part 3d, 3e in ground bar shell 3, and a center part They are sectional drawing (B) of this, and sectional drawing (C) in an edge part position. The electrical connector 1 shows characteristics depending on the presence / absence of a ground contact at the center, and a signal is input to the connector end (A) and a signal is input to the connector center (B). It is the perspective view (A) and sectional drawing (B) of the electrical connector which concern on a prior art example. It is the perspective view (A) and sectional drawing (B) of the electrical connector which concern on the prior art example.

Explanation of symbols

1 electrical connector,
2 insulator, 2a protrusion,
3 Grand bar shell, 3a shell body,
3b rear, 3c front,
3d, 3e reinforcement extension,
3f, 3g ground terminal, 3h recess,
3i Central ground terminal,
4 Contact,
4a Male contact for ground,
5 Plug shell, 5a Recess,
5b, 5c crimped portion, 5d protrusion,
5e bent part, 5f, 5g bent part,
10 extra fine coaxial cable, 10a center conductor,
10b outer conductor,
11 Printed circuit board,
12 electrical connector for receptacle, 12a shell,
12b legs,
12c, 12d Ground contact,
12e, 12f Signal contacts,
13 heat chip, 13a solder foil,
14 Grand bar.

Claims (3)

An insulator made of synthetic resin, a ground bar shell integrally formed with the insulator, a plurality of contacts integrally formed side by side with the insulator, and an upper side of the insulator covered and fixed An electrical connector comprising: a plug shell electrically connected to the ground bar shell;
The ground bar shell is formed by bending the rear part of the substantially horizontal shell body part into a uniform L-shaped cross section in the lateral direction, and the front part alternately and obliquely protrudes downward in the oblique direction. The part is formed,
On both ends in the lateral direction of the plug shell, a caulking portion that is caulked so as to sandwich an end portion of the shell main body portion of the ground bar shell and an end portion of the insulator is formed,
The ground bar shell and the plug shell are soldered in a plurality of locations in the lateral direction,
An electrical connector featuring. At both ends of the ground bar shell, there is a ground terminal portion extending in an inverted L shape toward the mating mating side, where the contact terminal portion of the female contact on the mating mating side contacts the ground terminal portion Is provided with a recess along the fitting direction,
The electrical connector according to claim 1. The central portion of the ground bar shell in the lateral direction is provided with a central ground terminal portion that extends in the front direction perpendicular to the lateral direction and is soldered and electrically connected to the upper portion of the male contact for ground. The plate thickness of the ground terminal is made thinner than the shell thickness,
The electrical connector according to claim 1, wherein:

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