JP2009117289A - Electrical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical connector which is suitable for high-speed differential transmission and high-density mounting as well. <P>SOLUTION: A contact 3 of the electrical connector 1 comes into contact with a contact on the mating side by its one end 3b, and connects to a pad on a printed board by its other end 3c. The contacts 3 are arranged in a zig-zag manner to a lateral direction at constant intervals for each pair. Adjoining pair of contacts 3d and 3d are arranged to face each other in a back-and-forth direction orthogonal to the lateral direction. In the pair of contacts, the inter-terminal distance a of the other end 3c is longer than the inter-terminal distance b of one end 3c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is used for a small and low-profile electrical connection, and more particularly to an electrical connector for a receptacle for connecting a plug electrical connector with a micro coaxial cable and a printed circuit board.

Conventionally, small and low-profile electrical connectors have a smaller number of contacts that are installed along with the lighter, thinner and smaller electronic devices used, and the pitch between contacts is also high for high-density mounting. It is narrowed. For example, if the contact pitch t = 0.4 mm, the occupied area of the substrate becomes large, which is inconvenient. However, t = 0.3 mm, the contacts are arranged in one row, or the staggered arrangement for each terminal. In some cases, high-density mounting is achieved (see Patent Document 1). FIG. 8 shows the terminal layout of the surface mounting portion on the printed circuit board and its characteristics (circuit board exclusive area, solderability, compatible with differential transmission) in the conventional electrical connector.
JP 2007-157594 A

  However, in the conventional electrical connector, even if it is desired to set the contact pitch to a pitch t = 0.3 mm due to high-density mounting, there is a risk of bridging with adjacent terminals, resulting in poor productivity, resulting in such bridging. When repair work is required, it is difficult to apply the tip of the soldering iron individually to the surface mounting part on the printed circuit board, which tends to be avoided because the production efficiency deteriorates. High-speed differential signal when staggered for each terminal (in this case, serial transmission in which signals are sequentially transmitted through one transmission line is executed in differential wiring in which one signal is transmitted through a pair of pair wirings) In-pair coupling A of the pair terminal that transmits the signal becomes weak, or the in-pair skew B increases (see FIG. 8, conventional example (1)), and is easily affected by noise. Furthermore, when t = 0.4 mm, there is a problem that the board area occupied by the connector is increased, which is inconvenient (see the conventional example (3) in FIG. 8). The electrical connector according to the present invention has been proposed in order to solve such a problem.

  The gist for solving the above-mentioned problems of the electrical connector according to the present invention and achieving the object is a contact in the electrical connector, and the contact comes into contact with the contact on the other end of the connection at one end thereof, and the contact at the other end. The contacts are connected to pads on a printed circuit board, the contacts are arranged in a staggered arrangement in pairs at equal intervals in the lateral direction, and the adjacent pairs of contacts are mutually connected in the front-rear direction orthogonal to the lateral direction. The distance between the terminals at the other end of the pair of contacts is wider than the distance between the terminals at the one end.

  The distance between the terminals at the other end is set to 0.4 mm, the distance between the terminals at the one end is set to 0.3 mm, and is bent at a bent portion in the middle between the other end and the one end. This includes that the pitch has been converted.

  According to the electrical connector of the present invention, the other end portion of the contact can be connected to the surface mounting portion on the printed circuit board, and each pair of contacts is arranged in a staggered manner so that it can cope with a high-speed differential signal (serial signal). become. Also, since one end of the contact has a narrow pitch of 0.3 mm, the connector occupied area of the mating plug electrical connector connected to this electrical connector by the vertical fitting method is reduced, and the folding portable It can be inserted through a small insertion hole in a hinge portion of a telephone or the like. Since the other end portion of the electrical contact is pitch-converted for surface mounting on the printed circuit board, a soldering iron can be individually applied to the contact, so that repair work or the like can be performed.

  As shown in FIG. 1, an electrical connector 1 according to the present invention is a receptacle connector that is surface-mounted on a printed circuit board in a mobile phone, PDF, digital camera, or the like. A plug connector to which an ultrafine coaxial cable is connected is fitted into the electrical connector 1 and is electrically connected.

  As shown in FIGS. 2 (A) to 2 (C), a contact 3 that is supported by being embedded and fixed to a synthetic resin insulator 2 in the electrical connector 1 is supported at one end of the contact 3. The part 3b is in contact with the contact on the connection partner side, and the other end 3c is connected to a pad on the printed circuit board.

  The contacts 3 are characterized by their arrangement, and as shown in FIGS. 1A and 1C, the contacts 3 are arranged in pairs in a staggered arrangement at equal intervals in the horizontal direction, and The pair of adjacent contacts 3d, 3d are arranged to face each other in the front-rear direction orthogonal to the horizontal direction. In the pair of contacts 3d, the distance a between the terminals of the other end 3c is set wider than the distance b between the terminals of the one end 3b.

  More specifically, as shown in FIG. 4D, the distance a between the terminals of the other end 3c in the pair of contacts 3 and 3 is 0.4 mm, and the distance b between the terminals of the one end 3b is It is set to 0.3 mm. The pitch is converted by being bent at a bent portion 3e between the other end 3c and the one end 3b.

  Details of the contact 3 are shown in FIGS. 3 and 4A to 4D. As described above, the pair of contacts 3d are arranged in a staggered manner and opposed to each other, and the pitch of the contacts 3 is converted to 0.4 mm only at the surface mounting portion, thereby eliminating the possibility of bridging with adjacent terminals. As shown, it can be placed on the printed circuit board 4.

  Further, as shown in FIG. 5 to FIG. 6, signal crosstalk when the plug electrical connector 5 with the micro coaxial cable 6 is connected to the electrical connector 1 and serial transmission is transmitted by differential wiring. As shown in FIG. 7, the noise is less than the Christoke noise in the case of other wirings. Therefore, the intra-pair coupling is good and the noise is not easily radiated to the outside. It can be seen that this is suitable. As shown in FIG. 8, the electrical connector 1 of the present invention satisfies all the characteristics and exhibits the effects specific to the present invention.

It is a top view (A), a front view (B), a bottom view (C), a side view (D), and a perspective view (E) of the electrical connector 1 according to the present invention. It is sectional drawing of the electrical connector 1 of the same invention, and is sectional drawing (A) along the XX line in FIG. 1 (A), sectional drawing (B) along the YY line, and ZZ line. It is sectional drawing (C) along. 3 is a perspective view of a contact 3 in the electrical connector 1. FIG. Front view (A), plan view (B), side view (C) of the contact 3, a side view showing a state in which the chip connection between the contact connection side and the substrate mounting side of the pair of contacts 3, 3 is converted. It is a figure (D). They are a perspective view (A) and a side view (B) showing the usage state of the electrical connector 1. It is sectional drawing (A) of the fitting state of the electrical connector 1 and the electrical connector 5 for plugs, (B). FIG. 3 is a diagram showing the crosstalk noise characteristics of a pair of contacts 3 and 3 in the electrical connector 1. It is a figure which compares each characteristic of the electrical connector for receptacles.

Explanation of symbols

1 electrical connector,
2 insulators,
3 contacts, 3a center,
3b one end, 3c other end,
3d a pair of contacts, 3e bends,
4 Printed circuit board,
5 Plug electrical connector,
6 Extra fine coaxial cable.

Claims (2)

The contact fixedly supported by the insulator in the electrical connector is connected in contact with the contact on the other end of the connection at one end thereof, and connected to the pad on the printed circuit board at the other end.
The contacts are arranged side by side at equal intervals in a staggered arrangement for each pair, and the adjacent pair of contacts are arranged opposite to each other in the front-rear direction orthogonal to the horizontal direction,
The distance between the terminals at the other end in the pair of contacts is wider than the distance between the terminals at the one end.
An electrical connector featuring. The distance between the terminals at the other end is set to 0.4 mm, the distance between the terminals at the one end is set to 0.3 mm, and the pitch is bent at the middle bent portion between the other end and the one end. Has been converted,
The electrical connector according to claim 1.

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