JPH04102178U - Connector with photo sensor - Google Patents

Abstract

(57) [Summary] [Purpose] A sensor is installed inside the female connector 23 attached to the device, and the male connector 21 inserted from the outside is activated to automatically terminate or not terminate the termination resistor. to be done. [Structure] A sensor consisting of a light emitting diode 1 and a phototransistor 2 is attached inside a female connector 23 attached to the device, and when a male connector 21 is inserted, the tip 11 of the male connector emits light 9 of the light emitting diode 1. It is shielded to stop light entering the phototransistor 2. The phototransistor changes from on to off, activating the drive unit 10 connected to the collector of the phototransistor and opening the relay circuit. The terminating resistor connected to the relay circuit is opened.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a small computer system interface (hereinafter referred to as SCS). (referred to as I), and a photo sensor is attached to the connector used for the device. This invention relates to opening and closing a terminating resistor by attaching and detaching a connector.

0002

[Conventional technology]

Recently, the number of connections between information devices using the SCSI standard, which allows high-speed data transfer, has increased. ing. Figure 4 is a block diagram showing a conventional example of a connector with a photosensor according to the present invention. It is a diagram. equipment, such as display devices, floppy disk devices, host computers, etc. Connectors 21 and cables 22 are used to connect devices such as computers. connected in a chain. For example, if the first device is a host computer, One of the two connectors 23 attached to the host computer has a Connector 20 with terminating resistor is connected. There is a terminal inside the connector 20 with a terminal resistor. A resistor is provided and the signal line terminal is terminated to 5V and 0V via a terminating resistor. Ru. The other connector 23 uses connector 21 and cable 22 to connect to the next device. , and then the other connector 23 is connected to one connector 23 of 21 and cable 22 are used to sequentially connect the devices in a gazy chain. . The other connector 23 of the last device is a connector with a built-in terminating resistor. 20 is connected to terminate the device. 25 is connected with driver receiver. This is an interface between the data controller 23 and the device. for terminating the terminating resistor There are other ways. A terminating resistor circuit 24 is provided inside the device. Another method is to set a high-digit dip switch and terminate the terminal resistor. terminating resistor It is time-consuming to terminate the resistor, or if you frequently change the connections between devices. Sometimes you forget. If you forget to terminate the terminating resistor and use the device, If used, there were problems such as unstable signal transmission and reception between devices, resulting in malfunctions.

0003

[Problem that the idea aims to solve] The present invention was devised in view of the problems of the above-mentioned conventional technology. A male connector with a sensor attached inside the female connector and inserted from the outside. Automatically activates the sensor to terminate or not terminate the termination resistor. The present invention provides a device that performs this dynamically.

0004

[Means to solve the problem]

In order to solve the above problem, this invention connects the anode of the light emitting diode to the power supply. Connect the cathode to ground, ground the emitter of the phototransistor, and connect the collector to the resistor. Connect to the power supply through The other end is connected to the power supply via a relay circuit, and the first contact of the relay circuit is connected to the terminal of the connector. The second contact of the relay circuit is connected to the power supply via the first resistor, and the second contact is connected to the power supply through the first resistor. It provides a connector with a photosensor that is grounded through a resistor. be.

[0005]

[Effect]

According to the above configuration, a light emitting diode is installed inside the female connector attached to the device. When the phototransistor is attached and the male connector is inserted, the male connector's The tip part blocks the light from the light emitting diode and stops the light from entering the phototransistor. . The phototransistor changes from on to off and connects to the collector of the phototransistor. Activate the connected drive unit to interrupt the relay circuit. connected to relay circuit The terminating resistor is opened.

[0006]

【Example】

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 is a photo of this invention. A block diagram showing an example of the connector with a sensor, Fig. 2 is a block diagram showing an example of the connector with a photo sensor. FIG. 3 is a block diagram of the same photosensor-equipped connector.

[0007] In the figure, 1 is a light emitting diode, which is incorporated inside the connector. The node is connected to a 5V power supply and the cathode is grounded. 2 is phototransis It is built inside the connector and is connected with light emitting diode 1 and light 9. There is. The emitter is grounded and the collector is connected to a 5V power supply through a resistor 14. . 10 is a drive unit, the input terminal of which is connected to the collector of phototransistor 2; One end is grounded, and the other end is connected to a power source via a relay 3. 3 is relay The first contact is connected to the terminal 6 of the connector 23, and the second contact is connected to the terminal 5 through the terminating resistor 4. It is connected to the V power supply 7 and grounded 8 via the terminating resistor 5 . Termination like this The connection of the resistors is of the unbalanced type according to the SCSI standard. Figure 2(a) shows the connector 2 3 is a cross-sectional view of the sensor section, with a light emitting diode 1 at the tip of the female connector 23. and a phototransistor 2 are installed. Tip part of male connector 21 11 fits between light emitting diode 1 and phototransistor 2 when inserting the connector. The intrusion light 9 is blocked. FIG. 2(b) is a cross-sectional view of the contact portion of the connector 23, and 12 is a contact point of the female connector 23 and is connected to the terminal 6. 13 is a male connector When the connector is inserted, both contacts 12 and 13 come into contact and conduct. . Reference numeral 23 denotes a female connector, which is a fixed type connector attached to the device. 21 is o The same male connector 21 is connected via cable 22. Used to daisy chain devices. 24 is the termination circuit section, and the relay -3 and terminating resistors 4 and 5.

[0008] In the above configuration, the male connector 21 is connected to a fixed female connector attached to the device. When inserted into the connector 23, the tip portion 11 of the male connector 21 connects with the light emitting diode 1. It fits between the phototransistors 2 and blocks the light 9. When light 9 is blocked, the light The phototransistor 2 changes from an on operation to an off operation, and the drive unit 10 operates and the relay is activated. -3, and the contacts of relay 3 are switched from on to off. and terminating resistor 4 and 5 are separated from the terminal 6 of the female connector 23. On the other hand, the male connector When the connector 21 is not inserted into the female connector 23, the terminating resistors 4 and 5 are connected to the terminals. It is terminated with 6. Note that the 5V power is supplied from an external device. SCSI If you use the standard option, 5V will be applied to pin 25 of connector 23 from an external device. Power is supplied to the circuit, so the power for the circuit is taken from here.

[0009]

[Effect of the idea]

As described above, in this invention, the male connector is inserted into the female connector. When inserted, the terminator is open; when it is not inserted, the terminator is open. The termination resistor must be opened and closed manually each time the device is connected. The benefits of not having to do this are huge.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a connector with a photosensor of the present invention.

FIG. 2 is a sectional view of a main part of the connector with a photosensor of the present invention.

FIG. 3 is a block diagram of a connector with a photosensor of the present invention.

FIG. 4 is a block diagram showing a conventional example of a connector with a photosensor.

[Explanation of symbols]

1 light emitting diode 2 Phototransistor 3 relay 4 Terminal resistor 5 Terminal resistor 6 Female connector terminal 7 5V power supply 8 Grounding 9 Light from light emitting diode 10 Drive section 11 Tip of male connector 12 Female connector contacts 13 Male connector contacts 14 resistance 20 Connector with terminating resistor 21 male connector 22 cable 23 Female connector 24 Termination circuit section 25 Driver/Receiver

Claims (1)

[Scope of utility model registration request] Claim 1: The anode of a light emitting diode is connected to a power source, the cathode is grounded, the emitter of a phototransistor is grounded, and the collector is connected to a power source via a resistor,
Connect to the input end of the drive section, one end of the drive section is grounded and the other end is connected to the power supply via a relay circuit, the first contact of the relay circuit is connected to the terminal of the connector, and the second contact of the relay circuit is connected to the terminal of the connector. A connector with a photosensor characterized in that it is connected to a power source through one resistor and grounded through a second resistor.