TWI431855B - The electrical connector - Google Patents

Description

Electrical connector

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an electrical connector, and more particularly to an electrical connector that utilizes a transition of a circuit board to achieve a different distance between the inserted butt end and the wire lap end of the male end.

Since the signal communication between the liquid crystal display and the system host is very large and the frequency is very high, the high-frequency signal transmission system currently installed between the liquid crystal display interface and the system motherboard interface is ultra-high speed (1.4). Gb/s), Low Power Differential Signal (LVDS) receiver with low power consumption and low electromagnetic radiation characteristics as the signal transmission interface of the LCD display interface, and connected to the system host via the transmission line (Transmission Line) The signal transmission interface on the board interface, that is, the connector socket on the system board interface, together form a signal connection, and together form a conventional LVDS signal transmission system.

Generally, the male connector used in the conventional LVDS signal transmission system has the same size between the insertion butt end and the wire lap end, and the size of the female socket of the mating connector is matched by the insertion butt end. As the spacing between the terminals of the socket becomes smaller and smaller, the distance between the inserted butt end of the male connector and the overlapping end of the wire also becomes smaller and smaller, causing the wire overlapping end to be soldered and fixed with the signal transmission line. In the case of poor soldering and short-circuiting, the production yield of the LVDS male connector is reduced, and the production time and cost are increased.

The distance between the inserted butt end and the wire lap end of the conventional connector is the same, which causes the soldering end of the wire to be soldered and fixed to the signal transmission line, often causing poor soldering and short circuit, so that the LVDS male connector has The problem of reduced production yield and increased production costs.

The present invention provides an electrical connector including a housing, an insulative housing, and a circuit board, wherein the insulative housing is disposed on the housing, the circuit board is disposed on the insulative housing, and the circuit board has an abutting portion and a lap portion, the mating portion Forming a plurality of first contacts, the plurality of second contacts are formed on the lap portion, the first contacts and the second contacts are connected to each other, and the second contacts are connected to each other The two pitches are greater than the first pitch between the first contacts, and the first contacts are used to connect with the pair of connectors.

The electrical connector provided by the invention adopts a design that the distance between the gold fingers of the front and rear ends of the circuit board is different, so that the distance between the gold fingers of the wire end of the male end is greater than the spacing of the gold fingers of the inserted butt end. Therefore, when the wire lap end is soldered and fixed to the signal transmission line, the welding failure and the short circuit are not easy to occur, and the problem of reduced production yield, production time and cost of the LVDS male connector can be effectively solved.

Referring to FIG. 1 to FIG. 6 , the present invention provides an electrical connector 1 including a first housing 10 , an insulative housing 12 , and a circuit board 14 . The insulative housing 12 is disposed on the first housing 10 . The circuit board 14 is disposed on the insulative housing 12, wherein the front and rear ends of the circuit board 14 have an abutting portion 141 and a lap portion 142. The mating portion 141 is formed with a plurality of first contacts 143, the lap portion A plurality of second contacts 144 are formed on the 142, the first contacts 143 and the second contacts 144 are connected to each other, and the second pitch P2 between the second contacts 144 is greater than the first ones. a first pitch P1 between the contacts 143 for connecting with a pair of connectors (not shown) for connecting with the plurality of wires 2 connection.

In the embodiment, the circuit board 14 is a hard printed circuit board (PCB) having a thickness of about 0.28 mm. The circuit board 14 is provided with a plurality of through holes 145. The first housing 10 is provided with a plurality of through holes 145. The plurality of fitting portions 101 are fitted into the through holes 145 for mounting the circuit board 14 above the first casing 10. The metal layer 16 is disposed on the lower surface of the circuit board 14, wherein the metal layer 16 extends into the through holes 145 and a portion of the upper surface of the circuit board 14 to contact the metal layer 16 with the mating portion 101. This can achieve the effect of preventing electromagnetic interference and save the design of the lower iron shell. In this embodiment, the metal layer 16 is an electroplated copper layer, and the electroplated copper layer can be coated on the inner sidewall of the through hole 145 and the upper surface of the portion of the circuit board 14 along the through hole 145. In order to make the circuit board 14 more stably held on the first casing 10, the fitting portions 101 may be welded and fixed to the through holes 145 by welding. Since the insulative housing 12 is interposed between the first housing 10 and the circuit board 14, a plurality of openings 121 corresponding to at least a portion of the mating portions 101 are disposed on the insulative housing 12.

An accommodating space 18 is formed between the insulative housing 12, the first housing 10, and the circuit board 14. The second contacts 144 are located in the accommodating space 18. The plurality of wires 2 are respectively soldered to the second contacts 144, and the wires 2 are electrically connected to the second contacts 144, wherein the wires 2 are located in the accommodating space 18. It is to be noted that the abutting portion 141 of the rigid printed circuit board and the first contacts 143 protrude from the first housing 10, such that the abutting portion 141 of the circuit board 14 and the first contacts 143 are A connector male connector that forms a low voltage differential signal (LVDS).

Alternatively, the circuit board 14 may be a flexible printed circuit board (FPC). In order to increase the strength and thickness when connecting with the mating connector, a second housing (not shown) may be additionally provided for the flexible printing. On the circuit board, the second housing and the first housing can form an interference state of the snap-fit engagement.

In summary, the electrical connector of the present invention utilizes a design with different sizes of gold fingers between the front and rear ends of the printed circuit board, so that the distance between the gold fingers of the lap end of the male end is greater than the spacing of the gold fingers of the butt end. In this way, when the lap end is soldered and fixed to the signal transmission line, the welding failure and the short circuit are not easily generated, and the problem of reduced production yield, production time and cost of the LVDS male connector can be effectively solved. In addition, the electrical connector of the present invention can be copper-plated on the back of the hard printed circuit board to electrically conduct electricity with the upper iron shell to prevent electromagnetic interference (EMI), and the design and cost of the lower iron shell can be saved. Moreover, the flexible printed circuit board and the rubber core assembly do not need to use double-sided tape to avoid the fit problem.

The above detailed description is intended to be illustrative of a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are intended to be included in the scope of the patents covered by the present invention.

1. . . Electrical connector

10. . . First housing

101. . . Mating part

12. . . Insulating body

121. . . Opening

14. . . Circuit board

141. . . Docking

142. . . Lap

143. . . First contact

144. . . Second contact

145. . . Through hole

16. . . Metal layer

18. . . Housing space

2. . . wire

The first figure is a schematic perspective view of the electrical connector of the present invention.

The second figure is a perspective assembled view of the other direction of the electrical connector of the present invention.

The third figure is a perspective exploded view of the electrical connector of the present invention.

The fourth figure is a perspective enlarged view of the electrical connector in the third figure.

The fifth figure is an enlarged schematic view of the other direction of the electrical connector in the third figure.

Figure 6 is a cross-sectional view of the electrical connector of the first figure taken along line AA.

1. . . Electrical connector

10. . . First housing

12. . . Insulating body

14. . . Circuit board

2. . . wire

Claims (4)

An electrical connector includes: a first housing; an insulative housing disposed on the first housing; a circuit board disposed on the insulative housing, wherein the circuit board has a pair of connectors and a ride a plurality of first contacts formed on the mating portion, wherein the plurality of second contacts are formed on the overlapping portion, the first contacts and the second contacts are connected to each other, and the second portions are connected to each other The second spacing between the contacts is greater than the first spacing between the first contacts, the first contacts being used to connect with a pair of connectors, the circuit board being a hard printed circuit board, The circuit board is provided with a plurality of through holes, the first housing is provided with a plurality of fitting portions, the fitting portions are fitted to the through holes; and a metal layer is disposed on the circuit board. The metal layer is in contact with the fitting portions, and the metal layer extends into the through holes such that the metal layer contacts the fitting portions, and the insulating body is provided with at least a portion of the fitting portions. The portion corresponds to a plurality of openings. The electrical connector of claim 1, further comprising: a plurality of wires, respectively soldered to the second contacts, such that the wires are electrically connected to the second contacts. The electrical connector of claim 2, wherein an accommodating space is formed between the insulative housing, the first housing, and the circuit board, and the second contacts are located in the accommodating space. The electrical connector of claim 2, wherein the abutting portion and the first contacts protrude from the first housing.