JP3088091B2 - SCSI connection cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an SC used for interconnecting vertically adjacent SCSI when extending the function of a computer by stacking SCSI in multiple stages.
It relates to the connection cable for SI.

[0002]

2. Description of the Related Art A conventional SCSI connection cable is shown in FIG.
As shown in (1), since the round multi-core cable 2 having a length of about 10 to 20 cm and having the connectors -1 and 1 attached to both ends is used, there are the following drawbacks. An example of a cross section of the round multi-core cable 2 is as shown in FIG.
In FIG. 2, 3 is a conductor. (1) The variation in impedance caused by the variation in the position of the cable core is large, causing a variation in the signal propagation speed, and the stacking of SCSI is limited to at most four stages. (2) Since the cable length is long, the distortion rate of the signal waveform is large. (3) Since the length of the cable is long, a curved cable protrudes at a connecting portion, and it takes up bulk and extra space.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the drawbacks described in the prior art, and has a small variation in impedance and a length of about 1/4 of the conventional one. It is intended to provide a good SCSI connection cable.

[0004]

SUMMARY OF THE INVENTION A connection cable for SCSI according to the present invention is used for extending the functions of a computer.
SCSI with multiple stacks of SI, arranged vertically
A cable connecting the electrodes to each other;
The conductor of the flat cable slightly longer than the separation distance between the electrodes is connected to the connector attached to the SCSI electrode.
And the flat cable is housed in a substantially U-shaped metal case having an open front surface.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 3, reference numeral 5 denotes a flat cable, and a conductor 6 of the cable 5 is a connector-4, 4 terminal. The length of the cable 5 is slightly longer than the separation distance between the vertically adjacent SCSI electrodes.
It is about.

As shown in FIG. 3 and FIG.
4 and 4, a flat cable 5 is attached to a metal case 8 having a substantially U-shape with an open front surface 7 as shown in FIG.
Is stored in The metal case 7 has the functions of reinforcement and electrostatic shielding.

As shown in FIG. 4, the arrangement of the conductor 6 of the flat cable 4 is always constant, and the positional relationship between the conductor 6 and the terminal of the connector 4 to which the conductor 6 is connected is always constant. There is almost no variation in impedance between the bulls 4. On the other hand, in the conventional round multi-core cable 2, as shown in FIG. 2, a concentrically twisted wire core is disassembled at both ends and connected to the terminals of the connectors -1 and 1. Since they are arranged in a flat shape as much as possible, the positional relationship maintained in a cable state is broken. Since it is extremely difficult to keep this positional relationship constant during processing, it is inevitable that the impedance between the cables 2 attached to the connectors 1 and 1 varies. For example, a cable 2 with a connector for connecting SCSI up to the third stage
The impedance of the cable 2 with the connector connecting the third stage and the fourth stage varies even if the impedance of the cable 2 is high. , The speed of propagation of the signal decreases, and confusion occurs, and the signal cannot be propagated normally.

For these reasons, in the conventional SCSI connection cable, the stacking of the SCSI was limited to at most the fourth stage. On the other hand, it has been confirmed by experiments that the SCSI connection cable of the present invention does not cause any trouble up to the stacking of eight stages.

[0009] In addition to the reinforcing and electrostatic shielding functions, the metal case 7 has an appropriate rigidity.
4 and 4 also have an advantage that they can be easily attached to SCSI electrodes. If necessary, an ear 9 may be provided at an appropriate place of the metal case 7 so that the metal case 7 can be fixed to a frame of the computer with a screw or the like.

[0010]

Since the present invention is configured as described above, it has the following effects. Variations in impedance between cables can be suppressed. It is possible to cope with about twice the stacking of SCSI compared to the conventional case. Since there is almost no protrusion of the connecting portion, there is no bulk and no extra space is taken. The cable itself can be processed at a low cost, and a cable having higher performance than the conventional one can be provided at a price of about 1/10 of the conventional one.

[Brief description of the drawings]

FIG. 1 is a side view showing a conventional example.

FIG. 2 is a sectional view of a round multi-core cable.

FIG. 3 is a side view showing an embodiment of the present invention.

FIG. 4 is a perspective view of a flat cable.

FIG. 5 is a perspective view showing one embodiment of the present invention.

FIG. 6 is a perspective view of a metal case.

[Explanation of symbols]

 1 Connector 2 Round multi-core cable 3 Round multi-core cable conductor 4 Connector 5 Flat cable 6 Flat cable conductor 7 Front surface 8 Metal cable 9 Ears

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 61-166408 (JP, U) Japanese Utility Model Hei 4-58982 (JP, U) Japanese Utility Model Sho 59-9653 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H01R 9/00 H01R 24/00 H01B 7/00 G06F 1/00-3/00 H01R 31/08 H01B 11/00

Claims (1)

(57) [Claims] An SCS is provided for expanding the functions of a computer.
In a cable connecting the SCSI electrodes arranged at upper and lower positions by stacking the I in multiple stages, a flat cable conductor slightly longer than the separation distance of the SCSI electrodes is used for the SCSI electrodes. A substantially U-shaped metal cable which is connected to the terminal of a connector to be mounted and which has an opening on the front face and an ear for fixing the flat cable to the frame of the computer. Connection cable for SCSI, characterized by being stored in a cable