JP2005166660A - Scsi cable and manufacturing method of scsi cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of a connection work of a SCSI cable, achieve reduction in variations of quality and in costs, and avoid the occurrence of any error in handling data. <P>SOLUTION: The SCSI cable has one cable part 2 in which a plurality of signal line cables 10 are disposed to make a single cable; the other cable part 3 structured similarly; and a connector part 4 for connection disposed between both cable parts 2, 3. The connector part 4 to perform clustering (branch) connection has a first relay connector part 11 having a plurality of terminals to mutually connect by a half 10a of the plurality of cables 10 of the cable parts 2, 3 by pressuring; a second relay connector part 12 having a plurality of terminals to mutually connect by the remaining half 10b by pressuring; and a connector tip part 13 having pins to be output terminals of each cable 10 connected by both connector parts 11, 12. A work efficiency is further improved by sorting by color and identifying the cables 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an improvement in a connector portion of a connection cable of a computer peripheral device adopting a bidirectional parallel interface called SCSI (Small Computer System Interface).

  Conventionally, SCSI devices are connected by two types of external connection and internal connection. Internal connection is performed by using a flat cable 60 as a SCSI cable as shown in FIG. 23 and connecting the connector portions 61 and 61a to a built-in board (card) or a connector of a built-in device. Specifically, as shown in FIG. 24, a connector portion 61 at one end of a flat cable 60 is connected to a connector 63 of a SCSI host adapter card 62, and a connector 66 of a built-in device such as a hard disk drive 64 or a CD-ROM drive 65 is connected. , 67 are connected to the intermediate connector portions 61a, 61a of the flat cable 60. Such branching connection by the flat cable 60 is called clustering.

  On the other hand, the external connection is for connecting an external SCSI device. As shown in FIG. 25, an SCSI cable 70 having connector portions 72 at both ends of a cable portion 71 having a circular cross section called a cap tire is used. . And it connects by the daisy chain method called daisy chain.

  Specifically, as shown in FIG. 26, the connector portion 72 on one end side of the SCSI cable 70 is inserted into the external connection connector portion 74 of the SCSI host adapter card exposed from the personal computer 73 to the other end side. Is connected to the connector of the first external SCSI device 75. Using the same SCSI cable 70, the second external SCSI device 76, the third external SCSI device 77, and the fourth external SCSI device 78 are sequentially connected. A terminal 79 is connected to one connector of the SCSI device 78 connected last.

  As described above, the internal SCSI device is connected by clustering using the flat cable 60, and the external SCSI device is connected by daisy chain using the captyre type SCSI cable 70. The former connection is advantageous for cost reduction because it does not require a shield, but the strength and crosstalk of the flat cable 60 are problematic and are not used for external connection. On the other hand, although the latter connection is sufficient in terms of strength, since the connection is made many times between the connector portion 72 of the SCSI cable 70 and the connector of the external SCSI device 75, 76, 77, 78, impedance As a result, the predetermined impedance value becomes difficult to obtain.

  For this reason, recently, the idea of applying the concept of clustering connection of the conventional flat cable 60 to the SCSI cable 70 for external SCSI devices has appeared. As shown in FIG. 27, the new SCSI cable 80 of this system is provided with connector portions 82 and 83 at both ends of a cable portion 81 having a circular cross section, and connector portions 83 and 85 are connected to both ends of a similar cable portion 84. It is supposed to be. In this way, a predetermined number of external SCSI devices can be connected in a daisy chain.

  In this new SCSI cable 80, when the connector portions 82, 83, 85 are connectors for Wide SCSI devices, the number of pins of the connector portions 82, 83, 85 is 68. Here, the term “Wide SCSI” is obtained by thickening the path for transferring data. That is, what is called SCSI-1 or what is called Fast SCSI in SCSI-2, that is, an early standard in SCSI is 8-bit transfer, whereas Wide SCSI in SCSI-2 is It is a 16-bit transfer. For this reason, the maximum transfer rate is 5 MB / second for SCSI-1 and 10 MB / second for Fast SCSI, while 20 MB / second for Fast Wide SCSI. Incidentally, the maximum transfer rate of Ultra SCSI in the SCSI-3 standard in which the data transfer cycle is further reduced is 20 MB / second, and the Ultra Wide SCSI is 40 MB / second.

  In the new SCSI cable 80 for Wide SCSI devices, as shown in the schematic diagram of FIG. 28, a total of 68 signal line cables S1, S2,..., S35, S36,. , S68 (hereinafter collectively referred to as signal line cable SC). On the other hand, the connector 83 is provided with a total of 68 pins P1, P2,... Pn,..., P35, P36,. Then, the signal line cables S1, S1 of the cable portions 81, 84 are soldered to the pins P1. The signal line cables S2 and S2 of the cable portions 81 and 84 are soldered to the pin P2. In this way, the signal line cables S1 to S34 are connected to the 34 pins PI in the first row, and the signal line cables S35 to S68 are connected to the 34 pins PI in the second row. .

  Note that the new SCSI cable 80 for non-wide SCSI devices (hereinafter referred to as “Narrow SCSI devices”) includes a total of 50 signal line cables in 25 pairs, and the connection relationship is a new SCSI cable for wide SCSI devices. It is exactly the same as 80. The signal line cable SC in the new SCSI cable 80 for Wide SCSI equipment or Narrow SCSI equipment is formed by twisting seven signal lines. In addition, since the pins PI are bent as shown in FIG. 28, there are two parallel rows on the front side of each of the connector portions 82, 83, and 85, but on the back side, 1 on the front side. The row portion is arranged in two rows in a staggered manner, for a total of four rows.

  As described above, the new SCSI cable 80 that has recently started to be used is a so-called double solder that solders two signal line cables SC to each pin PI when the signal line cable SC is connected to the connector 83 or the like. It is necessary. When performing this double soldering, first, one of the pair of signal line cables SC of the cable portion 81 is soldered to one row of pins PI. Thereafter, one of the pair of signal line cables SC of the cable portion 84 is soldered to the pin PI of the one row. At this time, it is necessary to carry out the soldering operation while searching for the one corresponding to the previous signal line cable SC so that the soldering performed previously cannot be taken.

  When the soldering to the pin PI in the first row is completed, the soldering to the second row is performed in the same manner. Also at this time, first, the remainder of each pair of signal line cables SC in the cable part 81 is soldered, and then the remainder of each pair of signal line cables SC in the cable part 84 is soldered. In the case of this soldering as well, it is necessary to perform the soldering so that each signal line cable SC is made compatible and the previous soldering cannot be taken.

  As described above, the double soldering work of the new SCSI cable 80 is very fine work in addition to a long work time, so skill is required and a variation in quality tends to occur. . That is, when a person with a low skill level performs work, poor connection tends to occur due to poor soldering. In addition, the connector parts 83 and 85 for soldering are of a special type and are expensive.

  Further, in the conventional cable portions 81 and 84, the position of the signal line cable SC is not a fixed position, and the impedance is not stable. For this reason, when used in an external SCSI device of Ultra Wide SCSI having high-speed transfer such as SCSI-2 or SCSI-3, particularly high-speed transfer of 40 MB / second, the transferred data becomes unstable.

  The present invention has been proposed to solve the above-described problems, and an object of the present invention is to provide a SCSI cable that can improve work efficiency and can achieve a reduction in quality variation and a low price. Another object of the present invention is to provide a SCSI cable capable of preventing an error from occurring in data to be handled by stabilizing the impedance.

  In order to achieve the above object, according to the first aspect of the present invention, one cable portion in which a plurality of signal line cables are arranged to form one cable, the other cable portion having the same configuration, and both cable portions are provided. In a SCSI cable having a connector portion for connecting to a SCSI device provided between them and for clustering connection, the connector portion includes a half of a plurality of signal line cables in one cable portion and a signal line in the other cable portion. The first relay connector portion having a plurality of terminals for connecting the half of the cable by pressure welding, the remaining half of the signal line cable of one cable portion, and the remaining half of the signal line cable of the other cable portion A second relay connector portion having a plurality of terminals for connection by means of pins, and a pin serving as an output terminal of each signal line cable connected by both relay connector portions And a connector tip having.

  As described above, since the two relay connector portions to be connected by pressure welding are provided, so-called double soldering work is not required, work efficiency is greatly improved and quality is stabilized. Further, it is not necessary to use a connector that can be double-soldered, and the component cost is reduced.

  Each of the first relay connector portion and the second relay connector portion has a plurality of U-slit terminals for connection, each having a U-shaped notch slit at each end, and the slit portion Each signal line cable may be press-fitted one by one.

  In this manner, when U-slit terminals having slit portions that are U-shaped cutouts are used at both ends, and one signal line cable is press-fitted into each slit portion, each signal line cable and U-slit Connection with the terminal is ensured, and no data transfer error occurs.

  Furthermore, in the SCSI cable of the present invention, the U slit terminals have different slit widths at the slit portions at both ends thereof.

  When the slit widths of the slit portions at both ends of the U slit terminal are made different, the thickness of the signal line cable to be connected can be made different at both ends. For this reason, one cable part can be made thick and the other cable part can be made thin or vice versa, and the appearance of the cable part can be made clean or clean.

  Moreover, it is preferable to provide the 1st relay connector part and the 2nd relay connector part which press-contact the signal line cable of one cable part and the signal line cable of the other cable part, respectively in the state where they were connected.

  Since the signal line cables of both cable portions are connected in pressure, the impedance is stabilized. In addition, both cable portions can be formed from a single cable, and the configuration of the connector portion for connection is simplified, so that the number of connection work steps is reduced, the work efficiency is improved, and the material cost is low. Thus, the cost can be reduced.

  Furthermore, both the relay connector parts are each provided with a plurality of connecting one-side U-slit terminals each provided with a U-shaped cut-out slit part at one end, and inserted into the slit part of the one-side U-slit terminal. It is preferable to provide a pressure contact holding member having an insertion hole and having a function of sandwiching the cable.

  Thus, when the signal line cable is press-fitted into each slit portion using the one-side U-slit terminal having a slit portion that becomes a U-shaped cutout at one end, the connection between each signal line cable and the one-side U-slit terminal Is ensured and no data transfer error occurs. Furthermore, since the press-contact holding member is provided to strengthen the press-contact state, the connection can be further ensured and the connection state can be maintained for a long time.

  Further, each signal line cable is formed as a single cable by twisting a plurality of wire lines, and a pair is formed by twisting two cables, and a plurality of pairs are provided. It is preferable not to make all the twist pitches the same, but to have a plurality of types.

  When a plurality of signal lines are twisted into a single cable, when connected by pressure welding, the contact area with the terminal can be increased, the contact is stable, and no error occurs in the transferred data. It will be a thing. Moreover, since the twisting pitches of the two cables are different from those of the other pairs, the crosstalk between the pair cables is reduced, and more stable data transfer is possible.

  Further, the pin has a U-shaped notch in which a pin portion connected to the connector of the SCSI device is formed at the front end portion, and at least one of the two signal line cables connected is press-fitted and connected to the rear end portion. It is preferable that a slit portion is formed.

  When a slit part that becomes a U-shaped notch is formed at the rear end of the pin at the connector front end, and the signal line cable is press-fitted into the slit, the signal line cable connected at the connector front end is relayed. The connector can be used as it is. For this reason, the pressure welding work in both relay connector parts becomes easy, and the working efficiency is greatly improved.

  In addition, a plurality of signal line cables constituting the cable portion are divided into three layers, a central portion, an inner core portion surrounding the central portion, and an outer core portion surrounding the inner core portion, and at least the central portion and the inner core portion It is preferable that the thread is wound around the outer periphery in a spiral shape.

  As described above, the cable portion is divided into three layers of the center portion, the inner core portion, and the outer core portion, and the thread is spirally wound around the outer periphery of at least the two central layers, so that the impedance of the cable is stabilized. At the same time, between predetermined important signal line cables, for example, between control signal cables is fixed, and data transfer is performed stably.

  Further, it is preferable that either half of the signal line cable or the other half of the signal line cable is color-coded into a maximum of 6 to 12 colors, and the color-coded signal line cables are repeatedly arranged in order to constitute the inside of the cable portion.

  By making the color of the signal line cable 6 to 12 colors at maximum and repeatedly using the colors, the work efficiency at the time of manufacture can be further improved. For example, the use of 10 colors means that in the case of a total of 34 signal lines or 25 signal line cables that are half of the cable section, it will be repeated slightly more than 3 times or 2.5 times. This is preferable. When the number of colors is small, the number of appearing colors increases, and work errors tend to occur. On the other hand, if the number of colors is too large, it becomes difficult to remember and the workability deteriorates.

  In another invention, in a SCSI cable using a cable portion in which a plurality of signal line cables are arranged in a circular shape to form a single cable, the plurality of signal line cables are divided into a plurality of layers according to the distance from the center, A thread is spirally wound around at least the outer periphery of the central portion.

  In this way, the inside of the cable portion is divided into a plurality of layers, and the thread is spirally wound around at least the outer periphery of the central portion, so that the impedance of the cable is stabilized and between predetermined important signal line cables, for example, The cable between the control signal cables is fixed, and data transfer is performed stably.

  Furthermore, it is preferable that the plurality of layers be three layers of a central part, an inner core part surrounding the central part, and an outer core part surrounding the inner core part.

  Thus, since the inside of the cable is divided into three layers, 25 pairs, 50 lines, 34 pairs or 68 signal line cables can be arranged in a balanced manner in the entire cable section and in a circular cross section.

  According to another invention, in a SCSI cable using a cable portion in which a plurality of signal line cables are arranged to form one cable, the plurality of signal line cables are a plurality of pairs of cables, and at least one of each pair is connected. A maximum of 6 to 12 colors are color-coded, and the color-coded signal line cables are repeatedly arranged in order.

  By repeatedly using 6 to 12 colors for the signal line cable, the work efficiency at the time of manufacture can be further improved. The use of 6 to 12 types of colors means that in the case of a total of 34 or 25 signal line cables, which are half of the cable section, it will be repeated about a little more than 2 to 5.5 times. This is preferable. When the number of colors is small, the number of appearing colors increases, and work errors tend to occur. On the other hand, if the number of colors is too large, it becomes difficult to remember and the workability deteriorates.

  Furthermore, the color of the signal line cable for the ACKNOWLEDGE and REQUEST control signals may be specified by a color different from the repeated color. With this configuration, it is possible to obtain a SCSI cable that can always arrange a signal line cable for important control signals correctly at a predetermined position and perform stable data transfer.

  Furthermore, it is preferable that the other signal line cable of each pair is specified by color coding, the number of points drawn on the surface, and the form of the points. In this way, the other of each pair of the pair cables is specified by the color coding, the number of points and the form of the dots, so that it is possible to definitely combine the color-coded signal line cables corresponding to the signal line cables. Become.

  In addition, the manufacturing method of the present invention provides one cable unit in which a plurality of signal line cables are arranged to form one cable, the other cable unit having the same configuration, and a SCSI device provided between both cable units. In the manufacturing method of the SCSI cable for the clustering connection, the connector part includes a plurality of signal line cables of one cable part and a half of the signal line cable of the other cable part. For connecting the first relay connector part having a plurality of terminals for connecting the two cable parts by pressure welding and the other half of the signal line cable of one cable part and the other half of the signal line cable of the other cable part by pressure welding A second relay connector portion having a plurality of terminals, and a connector having pins serving as output terminals of each signal line cable connected at both relay connector portions It includes a distal end portion, a plurality of signal lines cable with multiple pairs of pair cables, and one half of the signal line cable pair cable, and the connection to the other half the other pair cable.

  If comprised in this way, since the two relay connector parts connected by pressure welding are provided, what is called a double soldering operation becomes unnecessary, work efficiency improves significantly, and the quality of a SCSI cable is also stabilized.

  Further, when connecting the signal line cable, the signal line cable arranged on the outer peripheral side in the cross section of the cable part is divided into at least two parts, a start part to be connected first and an end part to be connected last, The connection may not be twisted. If comprised in this way, since a signal line cable is connected in the form which divides the inside of a cable part into 2, it can prevent that a signal line cable twists. As a result, workability is improved and cable quality is stabilized.

  In another manufacturing method, a plurality of signal line cables are arranged as one cable part, the other cable part having the same configuration, and a SCSI device provided between the two cable parts. In a method of manufacturing a SCSI cable for connecting to a cluster and having a connector portion for connection to a connector, the connector portion includes a half of a plurality of signal line cables in one cable portion and a half of a signal line cable in the other cable portion. The first relay connector part having a plurality of terminals for connecting the two cable terminals by pressure welding, and the other half of the signal line cable of one cable part and the other half of the signal line cable of the other cable part are connected by pressure welding. And a connector having a pin serving as an output terminal of each signal line cable connected at both relay connector portions. The cable end of one cable part and the other cable part are peeled off at regular intervals, and the signal of the part where the outer cover is peeled off is constructed from both sides of the stripped part. Half of the wire cable is in pressure contact with the first relay connector portion, and the other half is in pressure contact with the second relay connector portion.

  Since a single connected cable is used as it is and a SCSI cable is manufactured without being cut, double soldering is unnecessary, manufacturing efficiency can be increased, and manufacturing cost can be reduced. In addition, the SCSI cable manufactured by this manufacturing method has no cut portion and the quality is stable.

  In the present invention, the double soldering operation is not required, the working efficiency is improved, and the quality of the cable is stabilized. Moreover, it becomes possible to use a commercially available normal connector, and the cost of parts can also be reduced. In another invention, the impedance of the cable portion is stabilized and a predetermined important signal line cable is fixed, so that data transfer is performed stably. Furthermore, in another invention, the work efficiency of the connection at the time of manufacture can be improved. Furthermore, in the manufacturing method of the SCSI cable of the present invention, the double soldering operation is not required, and the working efficiency is greatly improved.

  Examples of embodiments of the present invention will be described below with reference to FIGS.

  The SCSI cable 1 is a cable for performing clustering connection like a new SCSI cable 80 shown in FIG. The SCSI cable 1 includes a plurality of signal line cables 10 arranged in a circular shape, one cable portion 2 formed as one cable, the other cable portion 3 having the same configuration, and both cables 2 and 3. And a connector part 4 for connection to a SCSI device. Further, the SCSI cable 1 has a connector part 5 provided on the front end side for connection to a SCSI host adapter card (not shown), a cable part 6 connected to the cable part 3 and a connector part 7 and the like. Yes. The cable portion 6 has the same configuration as the cable portion 3, and the connector portion 7 has the same configuration as the connector portion 4.

  The SCSI cable 1 shown in this embodiment is for Wide SCSI equipment, and has a total of 68 pins P1 to P68 as shown in FIG. A total of 68 pins P1 to P68 are arranged in two rows of 34 each.

  The connector part 4 has a first relay connector part 11 that connects the half 10a of the plurality of signal line cables 10 of the one cable part 2 and the half 10a of the signal line cable 10 of the other cable part 3 by pressure welding. doing. Moreover, it has the 2nd relay connector part 12 which connects the remaining half 10b of the signal line cable 10 of the one cable part 2 and the remaining half 10b of the signal line cable 10 of the other cable part 3 by pressure welding. . The connector portion 4 is further provided with pins P1 to P68 that serve as output terminals of the signal line cable 10 connected by both the relay connector portions 11 and 12. Here, the pins P1 to P34 serve as output terminals for the remaining halves 10b and 10b of the signal line cable 10, and the pins P35 to P68 serve as output terminals for the signal line cable halves 10a and 10a.

  The tip of the connector portion 4 is a connector tip portion 13 in which pins P1 to P68 are insert-molded. As shown in FIG. 4, for example, as shown in FIG. 4, the connector front end portion 13 has odd-numbered pins positioned on the rear side and even-numbered pins positioned on the front end side, as shown in FIG. 4. It is located in a staggered pattern. This relationship is the same for the pins P1 to P34.

  The pins P1 to P68 are of two types, a long one and a short one, but are structurally similar to each other. That is, the pins P1 to P68 (hereinafter collectively referred to as the pin P) are made of conductive metal, and the tip thereof is a pin portion 15 having a thin pin shape, and the rear end is U-shaped. It becomes the slit part 16 used as a notch. The signal line cable 10 is press-fitted into the slit portion 16, and the covering portion of the signal line cable 10 is broken during the press-fitting, so that the pin P and the signal line cable 10 are connected to the signal line cable 10. ing. That is, the pin P and the signal line cable 10 are press-contacted.

  The first relay connector portion 11 and the second relay connector portion 12 have the same structure, and the first relay connector portion 11 will be described below on behalf of both the relay connector portions 11 and 12. And As shown in FIGS. 3, 6, and 7, the first relay connector portion 11 has a plurality of U-slit terminals 20 provided with slit portions 21 and 21 that are U-shaped cutouts at both ends. Yes. And the 1st relay connector part 11 has the main-body part 22 which hold | maintains this U slit terminal 20 integrally by insert molding, and the cover parts 23 and 23 which cover this main-body part 22 from both sides, respectively. .

  The U-slit terminal 20 is made of a conductive metal and has slit portions 21 and 21 and engagement protrusions 25 and 25. The slit portion 21 has the same shape as the slit portion 16 of the pin P, and is formed between the two sandwiched portions 26 and 26. As shown in FIG. 7, the slit portion 21 has a tip portion 21a having a large fan-like tip and a diameter L1 slightly larger than the diameter M1 of the signal line cable 10 to be connected. A cable holding portion 21b that can be placed, and a contact portion 21c that has a diameter L2 that is smaller than the inner diameter M2 of the signal line cable 10 and that makes the wire W in the signal line cable 10 contact the U-slit terminal 20. .

  The cable portions 2, 3, and 6 have the same structure, and the structure of the cable portion 2 will be described below as a representative. As shown in FIG. 8A, the cable portion 2 is roughly divided into an outer covering portion 30 and an inner core portion 31. The sheath 30 is formed by laminating a sheath, a braided shield, a conductive tape, and a press-wrapping tape in order from the outside to the inside. The sheath is an elastic member containing a resin material having heat resistance at 80 ° C., and the braided shield is formed of a tinned annealed copper wire. The conductive tape is wrapped around. The restraining winding tape restrains the inner core portion 31.

  As shown in FIG. 8 (B), the core portion 31 has a core 32 centered around a core 32 and a center portion 34 spirally wound by a first thread 33, and the center portion 34 surrounding the core portion 34. Is divided into three layers, an inner core portion 36 spirally wound by the second thread 35 and an outer core portion 38 surrounding the inner core portion 36 and the outer periphery of which is wound spirally by the third thread 37. ing. The third thread 37 may not be provided, and the restraining tape may be wound directly on the outer periphery of the outer core portion 38.

  There are a total of 68 signal line cables 10 constituting the core unit 31, but they are 34 pairs of twisted pair cable Nos. 1-No. 34. The arrangement is as shown in FIG. Twisted pair cable No. 1-No. 34 (hereinafter collectively referred to as twisted pair cable TW) is formed by twisting two signal line cables 10 and 10 as shown in FIG.

  In this embodiment, this twist pitch PW employs five levels (= 5 types) in consideration of impedance stability. That is, there are five twist pitches PW of 15 mm, 20 mm, 25 mm, 30 mm, and 35 mm. Further, in this embodiment, seven pairs with a twist pitch of 15 to 30 mm are included (total 28 pairs), and six pairs with 35 mm are included. The twist pitch PW may be the same for all twisted pair cables TW, or may be other types such as two or three types.

  Each signal line cable 10 covers seven wire lines W with a covering portion 40 formed of resin or the like. In this embodiment, the wire W is a tin-plated annealed copper wire, and the coating 40 is made of a skin layer made of a resin having a thickness of 0.025 mm and an inner foamed polyethylene having a thickness of 0.13 mm. Formed from layers.

  The signal line cable 10 is press-fitted into the slit portion 21 of the U-slit terminal 20 and pressed into the U-slit terminal 20. This pressure contact state is shown in FIG. The covering portion 40 of the signal line cable 10 is broken, and the wire line W and the U slit terminal 20 are brought into contact with each other. This pressure contact state is the same when the signal line cable 10 is pressed against the slit portion 16 of the pin P.

  The pin P to which each twisted pair cable TW is connected is shown in the table of FIG. The signal line cable 10a of the cable section 2 shown in FIG. 3 corresponds to the pin number described in the upper column of each twisted pair cable TW in FIG. 12, and the signal line cable 10b is each twisted pair cable in FIG. This corresponds to the pin number indicated in the lower column of TW. That is, twisted pair cable No. One signal line cable 10a is connected to the pin P1, and the other signal line cable 10b is connected to the pin P35. Similarly, twisted pair cable No. One signal line cable 10a is connected to the pin P2, and the other signal line cable 10b is connected to the pin P36. In this way, the signal line cable 10 of the cable portion 2 is divided into the half 10a and the remaining half 10b and connected to the pin P.

  Twisted pair cable No. 24 is a signal for so-called ACKNOWLEDGE (hereinafter referred to as ACK). Note that ACK refers to a signal transmitted by an initiator (side that performs an operation execution request) to indicate a response in data transfer. In addition, twisted pair cable No. 29 is used for a so-called REQUEST (hereinafter referred to as REQ) signal. This REQ refers to a signal sent by the target (side responding to an operation execution request) to request data transfer in data transfer.

  The ACK and REQ single-ended impedance is 90 ohms ± 6 ohms, and is more strictly defined than the impedance required for other signal line cables 10 (= 90 ohms ± 10 ohms). Also, the differential impedance is 115 to 135 ohms for both REQ and ACK and others. Further, the propagation delay time is set to a maximum of 5.4 ns (nanosec).

  Thus, ACK and REQ are extremely important control signals when performing data transfer. Therefore, in order to perform stable data transmission / reception, the twisted pair cable No. 24, no. 29 needs to be securely fixed at a predetermined distance. As shown in FIGS. 8 and 13, the cable portions 2, 3, and 6 of this embodiment are separated from each other by the first yarn 33, the second yarn 35, and the third yarn 37 and each signal line. Since the cable 10 is fixed, the impedance of each signal line cable 10 is stabilized. In particular, ACK and REQ twisted pair cable No. 24, no. Since 29 is fixed at a predetermined distance, data transmission / reception is stable. The diameter of the signal line cable 10 for ACK and REQ is about 0.63 mm, which is about 0.02 mm thicker than that of other signal line cables. This is achieved by increasing the thickness of the aforementioned skin layer.

  Each signal line cable 10 is colored on the skin layer of the covering portion 40 so as to increase work efficiency when connected. The signal line cable 10 connected to the pins P1 to P34 is provided with four types of marks in order. As shown in FIG. 14A, the mark is a long red or black point, two red or black points in FIG. 14B, three red or black points in FIG. 14C, Four types of continuous state of red or black of D) are employed.

  When each twisted pair cable TW shown in FIG. 12 is divided into a half signal line cable 10a and the other half signal line cable 10b and connected to the relay connector parts 11 and 12 from the top, it is shown in FIG. It becomes as follows. That is, no. 1 in order, and finally No. 1 34 are connected. The signal line cable 10a in the cable section 3 is connected to the first relay connector section 11, but first, twisted pair cable No. 1 is a signal line cable 10a which is white and has a long red mark and is connected to the pin P1. Next, twisted pair cable No. Two white and two red signal line cables 10a are connected for pin 2. In this way, connections are made in order.

  Note that the twisted pair cable No. 1 is arranged at the outer core 38, about half of the outer core 38 is first connected, then to the inner core 36 and to the center 34, and then once The thing of the outer core part 38 is connected. Next, it returns to the center part 34 and immediately returns to that of the outer core part 38. No. of the outer core 38. After connecting No. 25 to No. 28, the signal line cable 10 of the five pairs of cables (No. 30 to No. 34) of the outer core part 38 is finally returned to the central portion 34 (for No. 29). Is connected.

  On the other hand, the signal line cable 10 b in the cable portion 3 is connected to the second relay connector portion 12. At this time, the signal line cable 10b is initially composed of 8 colors in order from the brown color for the pin P35, that is, 8 colors of "brown, red, orange, yellow, green, blue, purple, gray". The colors are repeated in order. Similarly to the signal line cable 10a, the signal line cable 10b is first connected from the outer core portion 38, the inner core portion 36 and the central portion 34 are connected, and finally the half of the outer core portion 38 is finally connected. Connected.

  In the SCSI cable 1 as described above, when the connector unit 4 is configured, first, the signal line cable 10 is connected to the pins P1 to 68 based on the above-described criteria. The relationship between the cable portion 2 and the connector portion 4 is exactly the same as the relationship between the cable portion and the connector portion for connecting the two conventional SCSI devices shown in FIG. It may be used as it is.

  After the cable portion 2 and the connector portion 4 are connected, one signal line cable 10a is pressed into contact with each U-slit terminal 20 of the first relay connector portion 11 with the positional relationship of each signal line cable 10a as it is. Similarly, each signal line cable 10 b is press-contacted to the second relay connector portion 12. This press contact is performed by press-fitting into the slit portion 21 on one side of each U-slit terminal 20. Note that the pressure contact of the signal line cable 10b may be performed after the pressure contact with both the slit portions 21 and 21 of the first relay connector portion 11 is completed.

  Next, the signal line cable 10a for connecting to each one of the twisted pair cable TW of the cable part 3, for example, the pins P1 to P34, of the U-slit terminal 20 of the first relay connector part 11 in the order shown in FIG. The other slit portion 21 is pressed. Thereafter, the signal line cable 10b for connecting to the pins P35 to P68 is pressed against the other slit portion 21 of the U-slit terminal 20 of the second relay connector portion 12 in the order shown in FIG. In addition, one side of the twisted pair cable TW is not collectively performed first and the other side is collectively performed later, but one signal of each of the signal line cables 10a and 10b of each twisted pair cable TW is not performed. Alternatively, the wire cable 10a may be connected to the first relay connector portion 11 first, and then the signal line cable 10b may be connected to the second relay connector portion 12 so as to be alternately connected.

  In addition, if the cable part 3 uses the general SCSI cable already connected with the connector part 7, the connection operation | work with the cable part 3 and the connector part 7 will become unnecessary. If the SCSI cable 1 is for two SCSI devices, the connection work in the connector unit 4 is completed by the above work. When the SCSI cable 1 for three SCSI devices is used, a SCSI cable in which the cable portion 6 and the connector portion are integrated is connected to the connector portion 7 in the same manner as described above. Similarly, the SCSI cable 1 for clustering and connecting many SCSI devices can be easily configured.

  In the above description, the SCSI cable 1 for Wide SCSI devices has been described. However, a SCSI cable for SCSI devices whose number of pins is not Wide (hereinafter referred to as “Narrow SCSI cable”) can be similarly configured. In the case of a narrow SCSI cable, the relationship between the twisted pair cable TW, the pin number, the color of the signal line cable 10 and the mark is as shown in FIG. Here, the pins 1 to P34 for the Wide SCSI device correspond to the pins P1 to P25 in the narrow SCSI cable, and the pins P35 to P68 for the wide correspond to the pins P26 to P50 for the narrow.

  In the Narrow SCSI cable, the arrangement of the core portion of the cable portion is as shown in FIG. Center portion 50 is twisted pair cable No. 19 and No. 24 and the intervening core 50a, and the first thread 51 is spirally wound around it. An inner center portion 52 is disposed so as to surround the center portion 50. The inner core 52 is a twisted pair cable no. 9-No. 12, no. 14-No. 18 and a second thread 53 is spirally wound around them. An outer core 54 is disposed around the inner core 52. The outer core 54 is a twisted pair cable no. 1-No. 8, no. 20-No. 23, no. 25, no. 13 and the winding tape 55 is wound around them. Since it is configured in this manner, each twisted pair cable TW is fixed at a predetermined position, and signals transmitted and received are stabilized.

  In the Narrow SCSI cable, the ACK signal is used for the twisted pair cable No. 19 and the REQ signal is for twisted pair cable no. 24. For this reason, as shown in FIG. 17, the signal line cable 10 for both ACK and REQ control signals becomes the central portion 50 and is firmly fixed. For this reason, the control signal that is important in data transmission / reception is stabilized, and data transmission / reception is also stabilized. The twisted pair cable No. 13 is a special signal wire wire W having a diameter of 0.127 mm that is 0.027 mm larger than other wire diameters.

  The arrangement relation of the signal line cable 10 of the narrow SCSI cable corresponding to the table shown in FIG. 15 in the SCSI cable 1 for the Wide SCSI device is as shown in FIG. 18. As shown in FIG. , Using the marks shown in Fig. 14, and using eight colors, five colors, etc., based on eight colors of "brown, red, orange, yellow, green, blue, purple, gray", improving work efficiency To do.

  Each of the above-described embodiments is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, the shape of the pins P1 to P68 is elongated as shown in FIG. 19A so that it also serves as a U-slit terminal, and the signal line cables 10a and 10b of the cable portions 2 and 3 are pressed against the slit portions. May be. Moreover, it is good also as a pin shape as shown in FIG.19 (B). In FIGS. 19A and 19B and the above-described embodiment, since only one signal line cable 10 is press-contacted (press-fit) into one slit portion, two or more signal lines are provided in one slit portion. The contact is stable and the data transfer is stable as compared with the case where the cable 10 is press-fitted.

  In addition, as shown in FIG. 20, the two signal line cables 10b and 10b are press-fitted into one slit portion 56, and after press-fitting, the gap L3 of the slit portion 56 of the U-slit terminal is narrowed by a jig. The force F may be applied. In this way, it is possible to maintain contact stability to some extent. Further, if the pin is made of a strong steel material so that the gap L3 of the slit portion 56 does not change even if the first signal line cable 10b is press-fitted, the force F is also unnecessary.

  In the U-slit terminal 20 shown in the above-described embodiment, the diameter L2 of the contact portion 21c of the slit portion 21 on both sides is the same, but the diameter L2 on both sides is made different so that the signal line cables 10 having different thicknesses can be used. You may enable it to press-contact. Thereby, the thickness of both cable parts connected mutually, such as the cable part 2 and the cable part 3, the cable part 3 and the cable part 7, etc., can be varied. If it does in this way, it can be set as the SCSI cable 1 excellent in aesthetics according to a SCSI apparatus. Further, in the above-described embodiment, the cable portion 2 and the cable portion 3 are arranged so as to overlap vertically with the connector portion 4 as shown in FIG. 1, but as in the conventional case shown in FIG. They may be arranged side by side.

  In the above-described embodiment, the core portion 31 such as the cable portions 2 and 3 is divided into the three layers of the central portion, the inner core portion, and the outer core portion. May be divided. Further, although the signal line cable 10b is color-coded in order of 10 colors, the signal line cable 10a side may be color-coded to 10 colors and a mark may be attached to the signal line cable 10b side. Further, in terms of work efficiency, it is preferable to color code 6 to 12 colors, and 9 to 11 colors are most preferable.

  In each of the embodiments described above, each signal line cable 10 is cut halfway. However, as shown in FIGS. 21 and 22, a U-shaped cutout is formed on one side in a state where the signal line cable 10 of one cable portion 2 and the signal line cable 10 of the other cable portion 3 are connected. You may make it press-contact to the one-sided U slit terminal 56 for a connection which has the slit part 56a. The one-sided U-slit terminal 56 is held by the main body 57 and also serves as P1 to P68 and P1 to P50 described above, and P1 to P34 (or P1 to P25) are the first relay connector portion. Thus, the portion of P35 to P68 (or P26 to P50) is the second relay connector portion.

  Both press-contact holding members 58 and 59 have the same structure. Hereinafter, the second holding member 59 will be described as a representative. A plurality of serrated recesses 59a are provided on both side surfaces of the second press-contact holding member 59, and insertion holes 59b into which the one-side U-slit terminals 56 are inserted are provided therein. On the other hand, on the side of the main body 57 that holds the one-side U-slit terminal 57, a plurality of serrated protrusions 57a that fit into the serrated recess 59a are also provided.

  When the structure shown in FIGS. 21 and 22 is adopted, the manufacturing method is as follows. A cable for Wide SCSI will be described below.

  First, the outer skin of the middle part of one cable part is stripped off at a fixed interval. Then, one signal line cable 10a of the signal line cable 10 in the peeled portion is pressed into contact with the slit portion 56a of the pins P1 to P34 serving as the first relay connector portion. Further, the other signal line cable 10b is press-contacted to the slit portion 56 of the pins P35 to P68 serving as the second relay connector portion. At this time, the signal line cable 10 is press-fitted and connected to the pins P1 to P68 using the first press-contact holding member 58 and the second press-contact holding member 59 having a function of sandwiching the signal line cable.

  As shown in FIG. 21, the signal line cable 10 a of the cable portions 2 and 3 is in pressure contact between the first pressure contact holding member 58 and the main body 57. On the other hand, the signal line cable 10 b of the cable portions 2 and 3 is press-contacted between the second press-contact holding member 59 and the main body 57. This pressure contact is performed by inserting the signal line cable 10 into the sawtooth concave portions 58a and 59a of the pressure contact holding members 58 and 59 so as to intersect as shown in FIG. 21, and then integrating the signal line cable 10 with the main body 57 side. . As a result, the signal line cables 10 a and 10 b enter the slit portion 56 a and are peeled off and connected to the one-side U-slit terminal 56. Further, the signal line cables 10a and 10b are firmly sandwiched between the serrated protrusions 57a and the serrated recesses 59a and 59b, and do not come out sideways.

  In the above-described embodiment, a cable for a SCSI device such as the SCSI cable 1 is targeted. However, a device using another high-speed interface, for example, a device using HSSIC (High Speed Serial Interface), instead of the SCSI device. The present invention can also be applied to other cables.

It is a principal part top view of the SCSI cable of embodiment of this invention. It is the principal part front view which looked at the SCSI cable of FIG. 1 from the arrow II direction of FIG. It is side surface sectional drawing of the principal part of the connector part of the SCSI cable of FIG. FIG. 4 is a plan view of the distal end portion of the connector viewed from the direction of arrow IV in FIG. 3. It is a perspective view of the pin currently used in the connector front-end | tip part of the SCSI cable of FIG. FIG. 4 is a partial rear view of the first relay connector portion as seen from the direction of arrow VI in FIG. 3. It is a figure which shows the U slit terminal currently used by the relay connector part of the SCSI cable of FIG. 1, (A) is a top view, (B) is the side view seen from the arrow B direction of (A). It is a figure which shows the cross section of the cable part of the SCSI cable of FIG. 1, (A) is sectional drawing which shows the whole structure, (B) is a structural diagram which shows the cross section of a core part. It is a perspective view of the twisted pair cable which comprises the cable part of the SCSI cable of FIG. It is sectional drawing of the signal wire | line cable which comprises the twisted pair cable in the cable part of the SCSI cable of FIG. It is a fragmentary sectional view which shows the state by which the signal wire cable was press-fit in the U slit terminal of the SCSI cable of FIG. 2 is a table showing the relationship among the twisted pair cable number, pin number, signal line cable color and mark of the cable portion of the SCSI cable of FIG. 1. It is a figure which shows the arrangement | positioning relationship of each twisted pair cable of the cable part of the SCSI cable of FIG. FIG. 2 is a diagram showing marks attached to the signal line cable of the SCSI cable in FIG. 1, (A) shows one point, (B) shows two points, (C) shows three points, (D) Indicates a continuous state. 3 is a table showing the arrangement relationship of the SCSI cable portion of FIG. 1 divided into a half signal line cable and a remaining half signal line cable. FIG. 3 is a table showing the relationship among twisted pair cable numbers, pin numbers, signal line cable colors and marks in the case of the SCSI cable of FIG. 1 for the narrow SCSI device. It is a figure which shows the arrangement | positioning relationship of each twisted pair cable of the cable part in the case of Narrow SCSI apparatus of the SCSI cable of FIG. FIG. 3 is a table showing the arrangement relationship of the SCSI cable of FIG. 1 for a narrow SCSI device divided into a half signal line cable and the other half signal line cable. FIGS. 2A and 2B are diagrams showing an example in which pins used in the connector tip portion and the relay connector portion of the SCSI cable in FIG. 1 are integrated with a U-slit terminal, in which FIG. 1A is a first example, and FIG. Respectively. It is a figure which shows the 3rd example which integrated the pin and U slit terminal which are used by the connector front-end | tip part and relay connector part of the SCSI cable of FIG. 1, (A) is the side view, (B) is (A) It is the partial front view seen from the arrow B direction of). It is a figure which shows the modification which forms without cutting the signal wire | line cable of the cable part of the SCSI cable of FIG. It is a principal part top view seen from the arrow A direction of FIG. 21, and is a figure which shows the state just before integrating a press-contact holding member with a main body. It is a partial top view which shows the conventional SCSI cable of a flat cable system. It is a figure which shows the state which connected the built-in SCSI apparatus using the flat cable of FIG. It is a top view which shows the conventional SCSI cable of a captyre type. It is a figure which shows the state which connected the external SCSI apparatus using the SCSI cable of FIG. It is a partial top view which shows the SCSI cable which can be clustered connection by the conventional captyre system. It is the figure which showed typically the internal structure of the SCSI cable of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 SCSI cable 2, 3 Cable part 4, 5 Connector part 10 Signal line cable 10a Half of signal line cable 10b The other half of signal line cable 11 1st relay connector part 12 2nd relay connector part 13 Connector front-end | tip part 20 U-slit terminal 21 Slit part 32 Core 33 First thread 34 Center part 35 Second thread 36 Inner core part 37 Third thread 38 Outer core part P (P1 to P68) Pin TW Twisted pair cable W Wire wire

Claims (17)

It has one cable part where a plurality of signal line cables are arranged to form one cable, the other cable part having the same configuration, and a connector part for connection to a SCSI device provided between both cable parts. In the SCSI cable for clustering connection, the connector section includes a plurality of terminals for connecting the half of the signal line cables of one cable section and the half of the signal line cable of the other cable section by pressure welding. And a second relay having a plurality of terminals for connecting the other half of the signal line cable of one cable part and the other half of the signal line cable of the other cable part by press contact It has a connector tip and a connector tip having a pin serving as an output terminal of each signal line cable connected by both the relay connector portions. SCSI cable to. Each of the first relay connector portion and the second relay connector portion has a plurality of U-slit terminals for connection, each having a slit portion that is a U-shaped cutout, and the slit portion. 2. The SCSI cable according to claim 1, wherein each of the signal line cables is press-fitted into the cable. The SCSI cable according to claim 2, wherein the U slit terminal has different slit widths at the slit portions at both ends thereof. The first relay connector portion and the second relay connector portion that press-contact the signal line cable of the one cable portion and the signal line cable of the other cable portion in a state where they are connected to each other are provided. The SCSI cable according to claim 1. Each of the relay connector portions is provided with a plurality of connecting one-side U-slit terminals each provided with a slit portion that becomes a U-shaped cutout at one end, and is inserted into the slit portion of the one-side U-slit terminal. The SCSI cable according to claim 4, further comprising a pressure contact holding member having an insertion hole and having a cable sandwiching function. Each of the signal line cables is formed as a single cable by twisting a plurality of wire lines, and by twisting the two cables, a pair is provided, and a plurality of pairs are provided. 6. The SCSI cable according to claim 1, wherein the pitches are not all the same, but there are a plurality of types. The pin has a U-shaped notch in which a pin portion connected to a connector of the SCSI device is formed at the front end portion, and at least one of the two connected signal line cables is press-fitted and connected to the rear end portion. The SCSI cable according to claim 1, wherein a slit portion is formed. A plurality of signal line cables constituting the cable part are divided into three layers, a central part, an inner core part surrounding the central part, and an outer core part surrounding the inner core part, and at least on the outer periphery of the central part and the inner core part. The SCSI cable according to any one of claims 1 to 7, wherein the thread is wound in a spiral shape. One of the signal line cables and the other half of the signal lines are color-coded into a maximum of 6 to 12 colors, and the color-coded signal line cables are repeatedly arranged in order to constitute the inside of the cable portion. Item 9. The SCSI cable according to any one of items 1 to 8. In a SCSI cable using a cable portion in which a plurality of signal line cables are arranged in a circular shape to form a single cable, the plurality of signal line cables are divided into a plurality of layers according to the distance from the center, and at least the layer of the central portion A SCSI cable characterized in that a thread is spirally wound around the outer periphery. 11. The SCSI cable according to claim 10, wherein the plurality of layers include three layers of a central portion, an inner core portion surrounding the central portion, and an outer core portion surrounding the inner core portion. In a SCSI cable using a cable portion in which a plurality of signal line cables are arranged to form a single cable, the plurality of signal line cables are a plurality of pairs of cables, and at least one of each pair has a maximum of 6 to 12 colors. A SCSI cable characterized by color-coding and arranging the color-coded signal line cables in order. 13. The SCSI cable according to claim 12, wherein a color of a signal line cable for ACKNOWLEDGE and REQUEST control signals is specified by a color different from the repeated color. 14. The SCSI cable according to claim 112, wherein the other signal line cable of each pair is specified by color coding, the number of points drawn on the surface, and the form of the points. It has one cable part where a plurality of signal line cables are arranged to form one cable, the other cable part having the same configuration, and a connector part for connection to a SCSI device provided between both cable parts. In the manufacturing method of the SCSI cable for clustering connection, the connector section includes a plurality of connectors for connecting the half of the plurality of signal line cables of one cable section and the half of the signal line cable of the other cable section by pressure welding. And a second relay terminal having a plurality of terminals for connecting the other half of the signal line cable of one cable part and the other half of the signal line cable of the other cable part by press contact. And a connector tip having a pin serving as an output terminal of each signal line cable connected at both the relay connector portions, A SCSI cable characterized by connecting a plurality of signal line cables to a plurality of pairs of cables, half of the signal line cables as one of the pair cables, and the other half as the other of the pair cables. Production method. In connecting the signal line cable, the signal line cable arranged on the outer peripheral side in the cross section of the cable part is divided into at least two parts, a start part to be connected first and an end part to be connected last, 16. The method of manufacturing a SCSI cable according to claim 15, wherein the connection is not twisted. It has one cable part where a plurality of signal line cables are arranged to form one cable, the other cable part having the same configuration, and a connector part for connection to a SCSI device provided between both cable parts. In the manufacturing method of the SCSI cable for clustering connection, the connector section includes a plurality of connectors for connecting the half of the plurality of signal line cables of one cable section and the half of the signal line cable of the other cable section by pressure welding. And a second relay terminal having a plurality of terminals for connecting the other half of the signal line cable of one cable part and the other half of the signal line cable of the other cable part by press contact. And a connector tip having a pin serving as an output terminal of each signal line cable connected at both the relay connector portions, One cable part and the other cable part are separated from each other by stripping the outer shell of one connected cable at a fixed interval. A method of manufacturing a SCSI cable, wherein the first relay connector portion is pressed against the second relay connector portion and the other half is pressed against the second relay connector portion.

Images