JPS5878637A - Endoscope apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope apparatus, and particularly to an endoscope unit,
The present invention relates to an endoscope device that transmits data between a light source unit and various units via a transmission path.

2. Description of the Related Art Endoscope apparatuses have been developed that control operations such as air supply, water supply, suction, and photography by transmitting data between an endoscope unit, a light source unit, and a camera unit. According to such an endoscope device, the light source unit functions as a control station, and the endoscope unit, unit, and camera unit function as controlled stations.

However, according to the conventional endoscope apparatus, it takes time for the light source unit to check the address of the unit to be controlled and then to start controlling the unit.

For example, when the light source unit (2) controls only the endoscope unit and a camera unit is attached to the eyepiece of the endoscope unit, the light source unit performs address check for the camera unit, to confirm that the connection is made.
i! ! It took some time to transfer the initial data to the camera unit. For this reason, the initial data is camera-uniform.

If the operator activates the camera unit before the data is transmitted to the camera unit, the camera unit () may malfunction.

Therefore, it is an object of the present invention to provide an endoscope apparatus that does not cause malfunctions when the in-house endoscope unit, light source unit, and camera unit are attached and detached.

According to the present invention, the light source unit includes a light source unit, an endoscope unit, and at least one various unit to which power is supplied from the light source unit when coupled to at least one of these units, and the power supply to the various units is started. An endoscope device is provided that disconnects a transmission path for a certain period of time when the transmission path is interrupted.

The present invention will be described in detail below with reference to the drawings.

According to FIG. 1, a camera unit 3 as various units is attached to the eyepiece section 2 of the endoscope unit 1, and a connector section 4 of the endoscope unit 1 is attached to the light source unit 5. Connected. The transmission circuit 7 of the endoscope unit 1 is connected to an operation switch such as an air supply switch 8, and is connected to a transmission circuit 9 of the camera unit 3 and a transmission circuit 11 of the light source unit 5 via a transmission line 6.

The transmission circuit 11Fi of the light source unit 5 functions as a control station, and the endoscope unit 1 and camera unit 7 and 9 of the camera unit 3 function as controlled stations. The transmission circuit 9 is connected to a camera unit such as a release switch 10, and operation switches of the camera unit 3, and the transmission circuit 11 is connected to an endoscope control circuit 12 for controlling air supply, water supply, suction, etc., and for photographing, etc. It is connected to a lighting control circuit 13 that performs lighting control.

FIG. 2 KFi shows the circuit configuration of the transmission circuits 7, 9 and 11. According to this circuit, a level conversion circuit 21 connected to the transmission path 6 is provided, and an output terminal of this level conversion circuit 21 is connected to an RX sampler circuit 22 and a shift register 23. Further, the output end of the sampling circuit 22 is connected to the shift register 23.

The output state of the shift register 23 is connected to the data bus 25 via the receiving pin 24 and the data bus 25#.
1 CPU: Connected to 16. The address Makoto 27 connected to this CPU 26 is... The output terminals of the chip select circuit 28 connected to the select circuit 2'11 are the receiving pin, the receiving pin, the status buffer 29, and the sending pin 27.
Connected to A30. The input and output terminals of the status buffer 29 are connected to the data buffer 25, and the signal output terminal is connected to the level conversion circuit 21. Also, this status buffer 29 contains reception/examination information.

The buffer 24 and the transmission buffer 30 receive the RxRDY signal and the TxRDY signal.
Connected to receive the XRDY signal. The RxRDY signal indicates that one character of received data is received.
The TxRDY signal indicates that the transmitter 7a 30 is capable of receiving transmission data. The output port of the transmitting amplifier 30 is connected to a shift register 31. The output layer of the shift register 31 is connected to the input terminal Tx of the high level conversion circuit 21.

Black.

The signal generator 32 is connected to the sampling circuit 22 and the shift register 3.

According to the level conversion circuit 21 shown in FIG. 3, the transmission line 6a signal line/6a and 6bfJ transmission line.

This line is connected to the output terminal of the buffer 41 and the input terminal of the receiving buffer 42, and is grounded via resistors 43 and 44, respectively. In addition, signal lines 6a and 6bq) transistors 45
and 46 collector-emitter paths, respectively. The bases of transistors 45 and 460 are connected to the power supply through resistor 47 and to ground through the collector-emitter path of transistor 48. The base of the transistor 480 is connected to the Schmi, Totrigapa, and Fa5 via the resistor 49.
The output end of o is connected.

The output terminal of the amplifier 50 is connected to one input terminal of the AND gate 51. The other input terminal of the AND dart 5 is connected to the transmission enable signal input terminal T, and the output terminal is connected to the enable terminal of the transmission pin 41. P, F5
The input terminal of o is connected to a time constant circuit 52. The time constant circuit 52 consists of a series circuit of a resistor 53 and a canonical 4-seater 54, and a resistor 5.
This time constant circuit 52 is composed of a diode 55 connected in parallel to the light-□ unit 5 when the camera unit 3 is attached to the eyepiece 2 of the endoscope unit 1. Connected to power.

Next, the operation of the above-mentioned endoscope device will be explained. When the endoscope unit 1 is not connected to the light source unit 5 and the endoscope apparatus is operated only with both units, the transmission circuit 11 of the light source unit and unit 5 as a control station is configured to transmit its own address code and the endoscope unit. It only recognizes the address code of Uni, To, and therefore,
Do not select other units in the polling/selecting sequence. That is, the control station transmission circuit 11 receives text data from the controlled station transmission circuit 7 and executes an operation command according to the text data. For example, endoscope uni,
When the air supply switch 8 of the transmission circuit 7 is activated, the control station transmission circuit 11 recognizes the air supply based on the text data of the CPU 26 of the transmission circuit 7, and issues an air supply command to the endoscope control circuit 12.
The endoscope control circuit 12Fi operates the air supply pump, air supply valve (not shown), etc. to supply air to the endoscope unit 1.

As mentioned above, the light source unit, 5 and endoscope unit.

5. There is no communication between the client and client 1. When the camera unit 3 is attached to the eyepiece section 2 of the endoscope unit 1 during this process, an operation for registering the camera unit 3 starts. In this case, the transmission circuit 9 and the transmission line 6 of the camera unit 3 are temporarily cut off.

That is, the camera unit 3 is the eyepiece section 2 of the endoscope unit 1.
When mounted on the camera unit, the light source unit and the power source (not shown) of the light source unit and unit 5 are connected to the camera unit 1 and 5, and a voltage is applied to the time constant circuit 52 of the transmission circuit 90 and the level conversion circuit 21 (FIG. 3). As shown in FIG. 4, the buffer 5
The input level at the 00 Å power end is increased, and after the time constant T, the input level is set to H level. Therefore, during this time T, the level at the output terminal of the amplifier 50 is at the L level, and the transistor 48 is non-conductive. Therefore, the transistors 45 and 46 are turned on, and the signal lines 6a and 6b of the transmission line 6 are grounded, so that the transmission line 6 is turned off. This disconnected state is detected by the control station transmission circuit 11 of the light source unit 5, and it is determined whether this disconnected state is due to an error or the connection of the camera unit 3. That is, as shown in the flowchart of FIG. 5, when a disconnection state occurs, error processing such as clearing 7 lags is performed, and a counter N (not shown) for counting the time of the disconnection state is cleared.

Thereafter, the address code of the registered controlled station, that is, the transmission circuit 7 of the endoscope unit 1, is found from a table and a polling code corresponding to this address code is transmitted. It is determined whether or not there is a response within a certain period of time, and if there is no response, it is determined that the transmission line 6 is temporarily disconnected due to trouble or the like, and a normal transmission routine is entered. If there is no response, a counter N is incremented and it is determined whether the time determined by the counter N is greater than the time T. If this determination is No, the process returns to the address code finding step. If the determination is YES, an address check is performed for a station with an unregistered address code, that is, the transmission circuit 9 of the camera unit 3.

When the time constant circuit 52 becomes H level after time T, the output of the amplifier 50 also becomes H level, transistor 21 becomes conductive, and accordingly transistors 45 and 46 become non-conductive, and signal lines 6a and 6b of transmission line 6 are grounded. The pole is opened, the disconnected state of the transmission line 6 is released, and transmission becomes possible. On the other hand, at this time, the palm gate 51 is opened by the H level output of the buffer 50, so that the status is cleared.

Transmission enable signal (Tm) from 7A29 (Figure 2)
is input to the enable terminal of the transmission buffer 41, and the transmission data via the shift register 3 can be transmitted. In this case, in response to the address check of the control station transmission circuit 11, the transmission circuit 9fi of the camera unit 3 transmits its own address code. The control station transmission circuit 11 adds a new camera address code, and then performs pooling/selection for both the controlled station transmission circuits 2 and 9 of the endoscope unit 1 and camera unit 3. Therefore,
When the camera unit 3 is set to 1 and the release switch 10 is operated, the CPo 26 of the transmission circuit 9 generates a release signal. The illumination control circuit 13 of the light source unit 5 performs photographing operations such as light emission of the photographing light source and automatic exposure control based on data based on the release signal.

As explained above, according to the present invention, when a camera unit is newly attached to the endoscope unit while the light source unit and the endoscope unit are communicating, a means is provided for making the transmission path non-conductive for a certain period of time. Therefore, even if the camera unit is activated before the camera unit is recognized, the camera unit will not operate.

Similarly, in the above embodiment, the newly installed unit was explained as a camera unit, but this unit also includes an imprint data setting unit, a television unit, an ultrasound diagnostic unit, a receiver unit, etc. Any unit used in an endoscope device may be used. Furthermore, the number of newly installed units is not limited to one, but multiple units may be installed.

If the installed unit is removed, there will be no response to the I-ring performed by the control station, but since the non-response of the unit can be recorded in the address table, it can be recognized that the unit has been removed. Therefore, when the unit is installed again, it will be correctly recognized.

In the embodiment, the transmission circuit of the light source unit is used as a control station, and the transmission circuit of other units is used as a controlled station, but the control station transmission circuit may be provided in any unit. A polling/selecting transmission procedure is used for the transmission, but any other method such as the JIS C6362 basic data transmission control procedure can be used as the transmission procedure.

Furthermore, although a balanced transmission line is used as the transmission line, an unbalanced transmission line may also be used. In this case, one of the transmission line shorting transistors 45 and 46 becomes unnecessary. Furthermore, in the embodiment, the CPo 26 is integrally provided in the transmission circuit, but the CPU It may be provided.

[Brief explanation of the drawing]

Fig. 1 is a schematic circuit diagram of an endoscope device according to an embodiment of the present invention, Fig. 2 is a circuit diagram of the transmission circuit of Fig. 1, and Fig. 3 is a level conversion of the transmission circuit of the camera unit. circuit schematic,
FIG. 4 is a time chart explaining the operation of the level conversion circuit shown in FIG. 3, and FIG. 5 is an operation flowchart of the control station transmission circuit. DESCRIPTION OF SYMBOLS 1... Endoscope unit, 2... Eyepiece part, 3... Camera unit, 5... Light source unit, 6... Transmission line, ? , 9.11...Transmission circuit, No.2...Endoscope control circuit, 13...Illumination control circuit, -1...Transmission buffer, 42...Reception buffer, 45.46... Transmission line shorting transistor, 50... Schmitt trigger. F, 52... time constant circuit. Applicant's representative Patent attorney Takehiko Suzue Procedural amendment 1976/12 Katami Director of the Patent Office Haruki Shimada 1, Indication of the case Patent No. 11856-1 Ryo 6914 No. 2, Name of the invention Endoscope device 3, Amendment Relationship with the case Patent applicant (037) Orin Gusu Optical Industry Co., Ltd. 4, Representative Director of the Patent Office Kazuo Wakasugi 1, Indication of the case Patent Application No. 176914 No. 1983 2, Title of the invention Relationship between endoscopy device 3 and supplementary IF case Patent applicant (037) Orinohosu Kogaku Kogyo Co., Ltd. 4, agent 6, specification subject to amendment, drawing 7, content of amendment (1) Application attached In the 6th negative 3rd line of the specification, the phrase ``data buffer 25'' is corrected to ``data buffer 9 xs''. (2) On page 12, line 8, after "even if ... is activated," it says, "The light source unit is already in the process of checking the installation status of the unit and will not respond to this operation of the camera unit." Insert. (3) On the 9th line of page 12, he said, ``...It never happens.'' [Similarly, even if a unit that is already attached, such as an endoscope unit, is activated, the light source unit does not respond. In other words, all units will not malfunction. ” he added.

Claims (1)

[Scope of the Claims] The light source unit, the endoscope unit, and the various units each have a transmission circuit that is connected to each other via a transmission path, and when the various units start being supplied with power by the light source unit, each unit,
An endoscope apparatus characterized in that it has means for disconnecting the transmission line for a certain period of time. (2) Claim 1 constituted by a time constant circuit that responds to the start of power supply in the form of a disconnection means, and a switch circuit means that connects the transmission line to ground potential for a certain period of time in response to the output of the time constant circuit. Section O Endoscope device. (3) The transmission circuit of the light source units has means for counting the period of interruption of the transmission line and determining the cause of the interruption of the transmission line according to the counted value. The endoscopic device described in Section. (4) The transmission circuit of the light source unit is connected to the various units when the determination means determines that the cause of the disconnection is due to the attachment of the various units. 4. The endoscope apparatus according to claim 3, further comprising means for checking the addresses of the various units and registering the self-address codes of the various units.