WO2006126431A1

WO2006126431A1 - Transmission cable and connector for transmission cable

Info

Publication number: WO2006126431A1
Application number: PCT/JP2006/309827
Authority: WO
Inventors: Yuichi Kariya; Naoki Maki
Original assignee: Omron Corporation
Priority date: 2005-05-27
Filing date: 2006-05-17
Publication date: 2006-11-30
Also published as: JP2006331898A

Abstract

A transmission cable small in size and mounting space and requiring less man-hour for production and a connector for the transmission cable. A plurality of upper transmission lines (11a), (11b), and (11c) and a plurality of lower transmission lines (12a), (12b), and (12c) are disposed, parallel with each other, on the front and rear surfaces of a band-like sheet (10a) in a staggered pattern, respectively, so as to be formed in pairs on the upper and lower surfaces.

Description

Specification

Transmission cable and connector for transmission cable

Technical field

[0001] The present invention relates to a transmission cable, and more particularly to a differential transmission cable and a transmission cable connector for connecting the differential transmission cable.

Background art

Conventionally, as a transmission cable for transmitting high-speed signals, the influence of electromagnetic noise and crosstalk noise can be suppressed by arranging ground lines in parallel on both sides of the high-speed signal line (Patent Document 1). reference). For this reason, even in the case of differential transmission, a plus wire is connected between a pair of ground wires 2 and 2 arranged in parallel to the upper surface of the substrate 1, as in the transmission cable schematically shown in FIG. 3 and minus line 4 are juxtaposed in parallel, and by connecting the ground lines 2 and 2 via bumps 6 to the ground layer 5 formed on the back surface of the substrate 1, the effect of noise is effectively reduced. (See Non-Patent Document 1).

Patent Document 1: JP 2002-117726 A

Non-Patent Document 1: Yamaichi Electric Co., Ltd. website, flexible circuit components, high-speed transmission cable, YFB03 O4 series, flexible cable microstrip structure, [online], updated May 9, 2005, [2005 5 Search on March 12], Internet URL: http://www.yamaichi.co.jp/

Disclosure of the invention

Problems to be solved by the invention

[0003] However, the transmission cable as described above requires an installation space that is as large as the width of the ground wiring, and there is a limit to downsizing the device. In addition, the transmission cable has a problem that not only the production man-hours are large, but also the number of connector connection terminals connected to the transmission cable increases, and the number of parts, assembly man-hours, and connection man-hours of the connector increase.

[0004] In view of the above problems, the present invention is a transmission cable that is small in size, has a small mounting space, and has a small production man-hour. Further, the transmission cable has a small number of parts, assembly man-hours, and connection man-hours. It is an object to provide a single connector.

Means for solving the problem

[0005] In the transmission cable according to the present invention, a plurality of upper transmission lines and a plurality of lower transmission lines are arranged in parallel on the front and back surfaces of the board, which solves the above-mentioned problem, and the zigzag pattern is paired vertically. The configuration is arranged in a shape.

The invention's effect

[0006] According to the present invention, the upper and lower transmission lines are arranged so as to form a pair in the upper and lower directions, so that the distance between adjacent transmission lines that do not form a pair becomes long and there is no need to provide a ground line. Therefore, only the width of the ground wire can be reduced, the mounting space can be saved, the apparatus can be downsized, the number of transmission cable production steps can be reduced, and the production cost can be reduced. In addition, since the connector for connecting the transmission cable, which is effective in the present invention, does not require a connection terminal for connecting to the ground wire, the number of parts, assembly man-hours and connection man-hours are reduced.

[0007] In an embodiment that is useful for the present invention, the horizontal distance between transmission lines arranged in pairs in the vertical direction may be shorter than the horizontal distance between adjacent wirings that are not paired in the vertical direction. . According to this embodiment, by shortening the horizontal distance between the paired transmission lines, the coupling between the paired upper transmission line and the lower transmission line becomes stronger. For this reason, even if there are variations in the effect of noise on the upper transmission line and the lower transmission line, the noise on the upper transmission line and the lower transmission line is equalized, and the resolution that covers the difference in noise increases. The adverse effects caused by can be further suppressed.

[0008] Further, as a connector connected to the transmission cable according to the present invention, a connector terminal having a first contact and a second contact that can be connected to the upper transmission line and the lower transmission line of the transmission cable, respectively, is used. Are arranged in parallel at a predetermined pitch.

[0009] According to the present invention, the upper transmission line and the lower transmission line can be connected by the connection terminals having the same shape, so that it is possible to cope with one manufacturing mold and to facilitate component management.

In an embodiment according to the present invention, even if the first contact force of the connection terminal is the same as the creepage distance from the connection end to the creepage distance from the second contact of the connection terminal to the connection end. Good. According to the present embodiment, the transmission time of the plus signal and the transmission time of the negative signal are equal when differential transmission is performed, and the time difference is eliminated. As a result, the noise canceling effect is enhanced and the reliability of the transmission signal is improved.

Brief Description of Drawings

FIG. 1 is a perspective view showing a connection structure of a first embodiment of a transmission cable according to the present invention.

2] FIG. 2A and FIG. 2B are an exploded perspective view and a perspective view showing the connection relationship between the transmission cable and the connection terminal according to the first embodiment, and FIG. 2C and FIG. It is an exploded perspective view and a perspective view.

FIG. 3A, FIG. 3B, FIG. 3C and FIG. 3D are a perspective view, a plan view, a front view, and an enlarged side view of the transmission cable shown in FIG.

FIG. 4A is a partially enlarged front view showing a connection structure with the connector shown in FIG. 1, and FIG. 4B is a sectional view taken along line BB in FIG. 4A.

FIG. 5A is a partially enlarged plan view showing the connection structure shown in FIG. 1, and FIG. 5B is a cross-sectional view taken along line BB in FIG. 5A.

FIG. 6 is a schematic cross-sectional perspective view of a transmission cable that works on a conventional example.

Explanation of symbols

[0012] 10: Transmission cable

10a: strip sheet

11a, l ib, 11c: Upper transmission line

12a, 12b, 12c: Downward transmission line

20: Connector

21: Connector body

30: Connection terminal

31: Insertion support

31a: Support recess

32: Center of rotation

33: Moving contact piece 33a: Movable contact

33b: Operation arm

34: Fixed contact point for engagement

34a, 34b: Upper and lower engaging tongues

34c: Fixed contact

40: Control lever

41:

42: Operation claw

50: Printed circuit board

51: Connection pad

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS. 1 to 5.

That is, the transmission cable 10 that is useful in the present embodiment is connected to the print substrate 50 via the connectors 20 and 20.

[0014] As shown in Fig. 3, the transmission cable 10 has three upper transmission lines 11a, l ib, 11c and three lower transmission lines 12a, 12b, 12c arranged in parallel on the front and back surfaces of the flexible belt-like sheet 10a. In addition, three pairs of wire pairs are provided by arranging them in a staggered pattern at the top and bottom.

As shown in FIG. 1, the connector 20 is press-fitted into the connector main body 21 and the connector main body 21 at a predetermined pitch, and above and below the transmission cable 10, transmission lines 11a to: Lie, 12a To 12c, a connection terminal 30 that can be connected to each other, an operation lever 40 that is rotatably attached to the connector main body 21, and a force.

As shown in FIG. 4, the connector main body 21 has an opening through which the transmission cable 10 can be inserted even on one side, and a plurality of connection terminals 30 are inserted at a predetermined pitch from the other side. , And the operation lever 40 is rotatably assembled. However, in the present embodiment, a pair of elastic arm portions (not shown) extend from both sides of the connector body 21 in order to rotatably support the operation lever 40 and to prevent the operation lever 40 from falling off. .

[0017] As shown in FIG. 5B, the connection terminal 30 is an insertion member that rotatably supports the operation lever 40. An insertion support portion 31; a substantially T-shaped movable contact piece 33 extending upward from a rotation center 32 positioned at a horizontal tip of the insertion support portion 31; and extending downward from the rotation center 32. The fixed contact piece 34 for engagement is comprised. The insertion support portion 31 is provided with a support concave portion 31a for supporting a protrusion 41 of an operation lever 40, which will be described later, on an upper surface edge portion. Further, the movable contact piece 33 has a movable contact 33a having a tip portion extending in the horizontal direction on one side, and an operating arm portion 33b extending in the horizontal direction on the other side. Furthermore, the engaging fixed contact piece 34 is divided into upper and lower parts, and the lower engaging tongue pieces 34a and 34b are engaged with the engaging tongue pieces 22 of the connector main body 21 to be prevented from coming off. The upper end of the tongue piece 34a is a fixed contact 34c.

In the present embodiment, the creepage distance from the rotation center 32 of the connection terminal 30 to the movable contact 33a is equal to the creepage distance from the rotation center 32 to the fixed contact 34c. For this reason, when differential transmission is performed, the transmission time of the plus signal is equal to the transmission time of the minus signal, and the time difference is eliminated. As a result, the noise cancellation effect is enhanced and the reliability of the transmission signal is improved.

The operating lever 40 is rotatably supported at its both sides by a pair of elastic arm portions (not shown) extending laterally from both sides of the connector main body 21. Therefore, as shown in FIG. 1 and FIG. Rotate. As a result, with the lever principle, the operation claw portion 42 of the operation lever 40 pushes up the tip end portion of the operation arm portion 33b of the movable contact piece 33, and the movable contact piece 33 tilts with the rotation center 32 as a fulcrum. The movable contact 33a is pressed against one end of the upper transmission lines 11a, l ib, 11c of the transmission cable 10, and the fixed contact 34c of the connection terminal 30 is one end of the lower transmission lines 12a, 12b, 12c of the transmission cable. Press contact with each other. As a result, three pairs of wire pairs are formed.

[0020] As shown in FIG. 1, the printed circuit board 50 electrically connects the connector 20 by connecting and fixing the connection terminals 30 of the connector 20 to connection pads 51 arranged in parallel at a predetermined pitch. is there.

Next, a method for connecting the above-described components will be described.

First, the insertion locus of the connector body 21 that causes the operation lever 40 is also the transmission cable. Insert one end of 10 and position. Then, by tilting the operation lever 40, the operation lever 40 is rotated with the ridge 41 of the operation lever 40 as a fulcrum. Therefore, the operation claw portion 42 pushes up the tip end portion of the operation arm portion 33b of the connection terminal 30 on the basis of this principle. As a result, the fixed contact 33a located at one end of the movable contact piece 33 is in pressure contact with one end of the upper transmission lines 11a, ib, 11c of the transmission cable 10, and the fixed contact 34c of the engaging fixed contact piece 34 is The lower transmission lines 12a, 12b, and 12c of the transmission cable 10 are in pressure contact with the respective one ends.

According to the present embodiment, it is not necessary to provide a ground wiring, and the horizontal distance between the pair of transmission lines, for example, the horizontal distance between the upper transmission line 11a and the lower transmission line 12a is determined as a pair. The horizontal distance between adjacent transmission lines that do not become, for example, the horizontal distance between the upper transmission line 11a and the lower transmission line 12b can be made smaller. For this reason, there is an advantage that ground wiring manufacturing and connecting work can be omitted as much as the transmission cable 10 can be reduced in size.

In particular, according to the present embodiment, the upper transmission line and the lower transmission line that are paired can be made even closer. For this reason, it is possible to increase the coupling of the plus signal and the minus signal that form a pair, and there is an advantage that the leakage of the transmission signal is further reduced.

Industrial applicability

[0024] The transmission cable according to the present invention can be applied to other high-speed signal transmissions as well as differential transmissions.

Claims

The scope of the claims

[1] A transmission cable in which a plurality of upper transmission lines and a plurality of lower transmission lines are arranged side by side on the front and back surfaces of the board, and are arranged in a staggered manner so as to be paired vertically.

[2] The transmission according to claim 1, wherein a horizontal distance between transmission lines arranged in pairs in the upper and lower directions is shorter than a horizontal distance between adjacent wirings that are not paired in the vertical direction. cable.

[3] Connection terminals having first and second contacts that can be connected to the upper transmission line and the lower transmission line of the transmission cable according to claim 1 or 2 are arranged in parallel at a predetermined pitch on the connector body. A transmission cable connector characterized by the above.

[4] The first contact force of the connection terminal The creeping distance from the connection end to the creepage distance from the second contact of the connection terminal to the connection end is the same as defined in claim 3. Connector for transmission cable.