Relay adapter and plug-in device system

Abstract

A relay adapter and an insertion device system are provided. The relay adapter has a first connector connected to a processor and a second connector connected to an insertion device, and relays the processor and the insertion device. The relay adapter has a power supply circuit that converts power supplied from the processor into power corresponding to the insertion device and supplies the power to the insertion device. The relay adapter has a switching circuit that causes the power supply circuit to cut off the supply of power to the insertion device when the first connector is connected to the processor and the second connector is not connected to the insertion device.

Description

Technical Field

[0001] This invention relates to a relay adapter and a device system capable of connecting a plug-in device to a processor. Background Technology

[0002] Endoscopes include reusable endoscopes (also known as reusable endoscopes) that are processed for reuse. Additionally, there are disposable endoscopes (also known as single-use endoscopes) that are processed after a single use.

[0003] The circuit board inside the endoscope is then mounted using a connector (single-contact plug) for endoscopes. The circuit board converts the signal format for use by the video processor.

[0004] When connecting a disposable endoscope to a video processor for reusable endoscopes, it is necessary to convert the signal to a format that the video processor can handle.

[0005] Previously, a repeater cable was proposed that could connect disposable endoscopes to video processors for reused endoscopes.

[0006] For example, Japanese Patent Application Publication No. 2021-183166 discloses a relay adapter connecting a video processor and an endoscope. The relay adapter includes a camera interface circuit that converts the format of the image signal. In response to instructions from the control unit, the camera interface circuit converts the image signal received from the image sensor of the endoscope into a signal format that the video processor can process. The camera interface circuit generates a format-converted signal and outputs the converted signal to the video processor.

[0007] The relay adapter converts the format of the image signal, thereby reducing the circuit size of disposable endoscopes and reducing costs. Summary of the Invention

[0008] One embodiment of the present invention provides a relay adapter that relays power between a processor and an insertion device, and includes: a first connector connected to the processor; a second connector connected to the insertion device; a power supply circuit that converts power supplied from the processor into power corresponding to the insertion device and supplies it to the insertion device; and a switching circuit that, when the first connector is connected to the processor and the second connector is not connected to the insertion device, causes the power supply circuit to cut off the power supply to the insertion device.

[0009] An insertion device system according to one aspect of the present invention comprises: an insertion device inserted into a subject; a processor that supplies power to the insertion device and receives electrical signals from the insertion device; and a relay adapter that relays the processor and the insertion device, the relay adapter comprising: a first connector connected to the processor; a second connector connected to the insertion device; a power supply circuit that converts the power supplied from the processor into power corresponding to the insertion device and supplies it to the insertion device; and a switching circuit that, when the first connector is connected to the processor and the second connector is not connected to the insertion device, causes the power supply circuit to cut off the power supply to the insertion device. Attached Figure Description

[0010] Figure 1 This is a perspective view of an endoscope system constructed using a reused endoscope, as shown in the first embodiment of the present invention.

[0011] Figure 2 This is a perspective view of the reusable endoscope according to the first embodiment described above.

[0012] Figure 3 This is a perspective view of an endoscope system constructed using a disposable endoscope instead of a reused endoscope, as described in the first embodiment above.

[0013] Figure 4 This is a perspective view of the structure of the portion connecting the endoscope and the video processor via an adapter in the first embodiment described above.

[0014] Figure 5 This is a block diagram illustrating the outline of the electrical structure of the endoscope, adapter, and video processor in the first embodiment described above.

[0015] Figure 6 It is a graph showing the presence or absence of connection detection and power-on status corresponding to the connection status of the endoscope, adapter, and video processor in the first embodiment described above.

[0016] Figure 7 This is a diagram illustrating a structural example of a connection detection circuit for a disposable endoscope and adapter used by a video processor to detect the connection of a reusable endoscope, as described in the first embodiment above.

[0017] Figure 8 This is a diagram illustrating a structural example of the connection detection circuit for the video processor and adapter when the disposable endoscope is not connected, as described in the first embodiment above.

[0018] Figure 9 This is a block diagram illustrating the outline of the electrical structure of the endoscope, adapter, and video processor according to a second embodiment of the present invention.

[0019] Figure 10 This is a block diagram illustrating the outline of the electrical structure of the endoscope, adapter, and video processor according to a third embodiment of the present invention.

[0020] Figure 11 This is a diagram illustrating a structural example of the endoscope system according to the fourth embodiment of the present invention.

[0021] Figure 12 This is a diagram illustrating a structural example of an endoscope system according to a fifth embodiment of the present invention.

[0022] Figure 13 This is a diagram illustrating a structural example of an endoscope system according to a sixth embodiment of the present invention.

[0023] Figure 14 This is a diagram showing the structure of the light guide within the endoscope and adapter in the endoscope system according to the seventh embodiment of the present invention.

[0024] Figure 15 This is a diagram showing the structure of the glass LG and PLG in the seventh embodiment described above.

[0025] Figure 16 This is a diagram illustrating the structure used in the seventh embodiment described above to explain the deviation in the transmission efficiency of illumination light from the glass LG to the PLG.

[0026] Figure 17 These are diagrams used to illustrate several embodiments of the glass LG and PLG in the seventh embodiment described above.

[0027] Figure 18 This is a diagram illustrating a structure for suppressing deviations in the transmission efficiency of illumination light when the optical axis of the glass LG is tilted relative to the optical axis of the PLG, as described in the seventh embodiment above.

[0028] Figure 19 This is a perspective view showing the internal structure of the connector of the endoscope according to the eighth embodiment of the present invention.

[0029] Figure 20 This is a top view showing the structure of the circuit board in the eighth embodiment described above. Detailed Implementation

[0030] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below.

[0031] Furthermore, in the accompanying drawings, identical or corresponding elements are appropriately labeled with the same reference numerals. Additionally, the drawings are illustrative; it should be noted that, for the sake of simplification, the length relationships, length ratios, and quantities of elements within a single drawing may sometimes differ from reality. Moreover, among multiple drawings, there may sometimes be sections where the length relationships or ratios differ from each other.

[0032] [First Implementation Method]

[0033] Figures 1 to 8 This represents the first embodiment of the present invention. Figure 1 This is a perspective view of the endoscope system 1 constructed using a reused endoscope 2A in the first embodiment.

[0034] Endoscopic system 1, for example, includes a reusable endoscope 2A, a video processor 3 (processor), and a monitor 4. Figure 1 As shown, the video processor 3 and monitor 4 are placed on or fixed to the trolley 9. Additionally, the reusable endoscope 2A can be hooked onto the hook of the trolley 9 when not in use. The endoscope system 1 is, for example, configured in an examination room where the examination and treatment of a subject are performed.

[0035] The video processor 3 supplies power to the reusable endoscope 2A and receives electrical signals from the reusable endoscope 2A. Figure 1 In the example shown, video processor 3 is a video processor with a built-in light source (a video processor with a built-in light source type), supplying illumination light to the reusable endoscope 2A. However, as described in the fourth embodiment below... Figure 11 As explained, the video processor 3 can also be separate from the light source device.

[0036] Figure 2 This is a perspective view of the reusable endoscope 2A according to the first embodiment.

[0037] The reusable endoscope 2A is an insertion device having a portion that can be inserted into the body of a patient. The reusable endoscope 2A can be reused multiple times through reprocessing. The reusable endoscope 2A includes an insertion section 2Aa, an operation section 2Ab, and a universal cable 2Ac. The reusable endoscope 2A can be configured, for example, as an electronic endoscope.

[0038] The insertion part 2Aa is the portion inserted into the body of the test subject. The test subject is assumed to be, for example, the lumen of a living body such as a human or animal. However, the test subject can also be a non-living body such as machinery or a building. The insertion part 2Aa has, in sequence from the front end side to the base end side, a front end portion 2Aa1, a bending portion 2Aa2, and a flexible tube portion 2Aa3.

[0039] The front end 2Aa1 is equipped with a camera unit, a front end of a light guide (LG), and a front side opening of the treatment device channel. The camera unit includes a camera optical system and an image sensor. The camera optical system images the optical image of the subject onto the image sensor. The image sensor performs photoelectric conversion (imaging) on ​​the optical image of the subject to generate an image signal.

[0040] The operating section 2Ab is located at the base of the insertion section 2Aa. The operating section 2Ab is a part for the user to operate the reusable endoscope 2A.

[0041] A universal cable 2Ac extends from the side of the operating section 2Ab, for example, the base end side. The universal cable 2Ac is a connection cable used to connect the reusable endoscope 2A to the video processor 3.

[0042] The insertion section 2Aa, operation section 2Ab, and universal cable 2Ac of the reusable endoscope 2A are equipped with light guides, signal lines, and air / water supply channels. The insertion section 2Aa and operation section 2Ab are equipped with a treatment instrument channel and a curved operation cable. The universal cable 2Ac and operation section 2Ab are equipped with a suction channel. The suction channel communicates with the treatment instrument channel within the operation section 2Ab.

[0043] Connector 2Ac1 (a single-contact plug), located at the extension end of the universal cable 2Ac, connects to the video processor 3. Connector 2Ac1 houses a circuit board within the endoscope that converts the format of the image signals from the image sensor.

[0044] For example, the video processor 3 with a built-in light source can use light-emitting devices such as LED (Light Emitting Diode), laser, or xenon as its light source. By connecting the connector 2Ac1 to the video processor 3, illumination light can be transmitted from the light source to the light guide.

[0045] Illumination light incident from the video processor 3 onto the base end face of the light guide is transmitted by the light guide (light guiding). The transmitted illumination light irradiates the subject from the front end face of the light guide disposed at the front end 2Aa1 of the insertion part 2Aa.

[0046] The video processor 3 sends drive signals for driving the image sensor via signal lines. The image signal output from the image sensor is sent via signal lines and its signal format is converted by the circuit board of connector 2Ac1. The converted image signal is then sent from connector 2Ac1 to the video processor 3 via signal lines.

[0047] The video processor 3 processes the image signal acquired by the image sensor to generate a displayable image signal. The video processor 3 can also overlay text information, etc., onto the image signal as needed. The video processor 3 outputs the image signal to the monitor 4.

[0048] Monitor 4 receives the image signal from video processor 3 and displays an image containing the endoscopic image.

[0049] Figure 3 This is a perspective view of an endoscope system 1 constructed using a disposable endoscope 2 instead of a reused endoscope 2A, as shown in the first embodiment.

[0050] Figure 3 The endoscope system 1 shown includes, for example, a disposable endoscope 2, a video processor 3 (processor), a monitor 4, a relay adapter 5 (hereinafter referred to as adapter 5), a suction pump 6, and a water delivery container 7.

[0051] As described above, the video processor 3 and monitor 4 are placed on or fixed to the trolley 9. The suction pump 6 is mounted on or fixed to the trolley 9. The water delivery container 7 is mounted, for example, on the side of the video processor 3.

[0052] Video processor 3, monitor 4, and trolley 9 Figure 1 The same as shown. That is, the video processor 3 is a processor for a reusable endoscope used in the reusable endoscope 2A.

[0053] In addition, Figure 1 The illustration is omitted, but the endoscope system 1 using the reused endoscope 2A may also include a suction pump 6 and a water delivery container 7.

[0054] The disposable endoscope 2 is an insertion device with a site for insertion into the body of the patient. The disposable endoscope 2 is disposed of after a single use, that is, it is discarded or recycled to a disposal facility after only one use. The disposable endoscope 2 (hereinafter appropriately referred to as endoscope 2) is for single use only and should not be reused multiple times.

[0055] The endoscope 2 includes an insertion part 2a, an operation part 2b, and a universal cable 2c. The endoscope 2 may be configured as an electronic endoscope, for example.

[0056] The insertion part 2a is the portion that is inserted into the subject. As described above, the subject can be either a living body or a non-living body. The insertion part 2a has a front end portion 2a1, a bending portion 2a2, and a flexible tube portion 2a3 in sequence from the front end side to the base end side.

[0057] The front end 2a1 is equipped with a camera unit, a front end of a light guide, and a front-side opening of the processing device channel. The camera unit includes a camera optical system and an image sensor 21 (see reference). Figure 5 (etc.). The camera optical system images the optical image of the subject onto the image sensor 21. The image sensor 21 performs photoelectric conversion (photography) on the optical image of the subject to generate an image signal.

[0058] Examples of image sensors 21 include CCD (Charge Coupled Device) image sensors, CMOS (Complementary Metal Oxide Semiconductor) image sensors, etc., but are not limited to these.

[0059] The curved part 2a2 is, for example, a part that can be bent in two directions or in four directions: up, down, left, and right.

[0060] The flexible tube portion 2a3 is a flexible tube portion. Furthermore, the example given here is a flexible endoscope 2 having the flexible tube portion 2a3. However, the endoscope 2 can also be a rigid endoscope where the portion corresponding to the flexible tube portion 2a3 is rigid.

[0061] The operating section 2b is a part for the user to operate the endoscope 2. The operating section 2b is disposed at the base end side of the insertion section 2a. The operating section 2b has a grip 2b1, a bendable operating knob 2b2, multiple operating buttons 2b3, and a treatment instrument insertion port 2b4.

[0062] The holding part 2b1 is the part where the user holds the endoscope 2 with their palm.

[0063] The bending operation knob 2b2 is an operating device for bending the bending section 2a2. The bending operation knob 2b2 is operated, for example, using the thumb of the hand holding the handle 2b1. When the bending operation knob 2b2 is operated, the bending operation line is pulled, and the bending section 2a2 bends.

[0064] When the bending portion 2a2 bends, the direction of the front end portion 2a1 changes. As a result, the imaging direction of the image sensor 21 and the illumination direction of the illumination light from the light guide change. In addition, the bending portion 2a2 is also bent to improve the insertability of the insertion portion 2a within the subject.

[0065] Multiple operation buttons 2b3 include, for example, an air / water supply button, a suction button, and a button associated with the camera. The air / water supply button is used to supply air or water to the observation window located on the front end 2a1 of the camera unit. The observation window is cleaned by supplying liquid, and the cleaned liquid is wiped away by supplying air. Air and water are supplied via an air / water supply channel (not shown).

[0066] The suction button is used to perform suction operations on the subject from the front end 2a1. For example, suction is performed from the subject via the suction channel. When performing a suction operation, fluid or mucous membrane is aspirated from the subject, for example.

[0067] Buttons associated with the camera are, for example, push-button switches used for release operations.

[0068] The instrument insertion port 2b4 is an opening on the base side of the instrument channel. Instruments such as forceps are inserted into the instrument channel through the instrument insertion port 2b4. The front end of the instrument protrudes from the opening on the front side of the instrument channel. Various treatments are performed on the subject through the protruding front end of the instrument.

[0069] A universal cable 2c extends from the side of the operating part 2b, for example, the base end side. A connector 2c1 (third connector) is provided at the extension end of the universal cable 2c.

[0070] The connector 2c1 of the disposable endoscope 2 has a different shape than the connector 2Ac1 of the reusable endoscope 2A. Furthermore, unlike the connector 2Ac1, the connector 2c1 does not have a circuit board for converting the format of the image signal.

[0071] Therefore, the disposable endoscope 2 is connected to the video processor 3 via adapter 5. The video processor 3 supplies power to the endoscope 2 via adapter 5 and receives electrical signals from the endoscope 2. That is, adapter 5 relays the connection between the video processor 3 and the endoscope 2. As will be described later, adapter 5 includes circuitry for converting the format of the image signals.

[0072] Figure 4 This is a perspective view of the structure of the portion of the endoscope 2 and the video processor 3 connected via adapter 5 in the first embodiment.

[0073] The adapter 5 has a connector seat 5b (second connector) at one end, which connects to the connector 2c1 of the disposable endoscope 2. The adapter 5 has a connector 5a (first connector) at the other end, which connects to the connector seat 3a of the video processor 3. That is, the connector 5a (first connector) is interchangeable with the connector 2Ac1 of the reusable endoscope 2A.

[0074] The insertion section 2a, operation section 2b, and universal cable 2c of the endoscope 2 are equipped with light guides, signal lines, and air / water supply channels. The insertion section 2a and operation section 2b are equipped with a treatment instrument channel and a curved operation cable. The universal cable 2c and operation section 2b are equipped with a suction channel. The suction channel communicates with the treatment instrument channel within the operation section 2b.

[0075] For example, as described above, the video processor 3 with a built-in light source includes a light-emitting device such as an LED (Light Emitting Diode), laser, or xenon light source. The adapter 5 includes a light guide and signal lines. By connecting the connector 2c1 to the video processor 3 via the adapter 5, illumination light can be transmitted to the endoscope 2.

[0076] Illumination light is incident from the video processor 3 to the light guide of the endoscope 2 via the adapter 5. The incident illumination light is transmitted through the front end portion 2a1 of the insertion part 2a of the light guide endoscope 2. The transmitted illumination light shines on the subject from the front end face of the light guide disposed at the front end portion 2a1.

[0077] The video processor 3 sends drive signals for driving the image sensor 21 via the signal lines of the adapter 5 and the endoscope 2. The image signal output from the image sensor 21 is sent to the adapter 5 via the signal line of the endoscope 2.

[0078] Adapter 5 processes the image signal acquired by image sensor 21, converting it into an image signal in a format that can be processed by video processor 3. Adapter 5 then sends the converted image signal to video processor 3.

[0079] The video processor 3 performs image processing on the received video signal to generate a displayable image signal. The video processor 3 can also overlay text information, etc., onto the image signal as needed. The video processor 3 then outputs the image signal to the monitor 4.

[0080] Monitor 4 displays an image containing the endoscope image based on the image signal output from video processor 3.

[0081] like Figure 3 As shown, the water delivery container 7 is connected to the connector 2c1 of the disposable endoscope 2 via an air and water delivery tube 7a. The connector 2c1 connects the air and water delivery tube 7a to the air and water delivery channel inside the endoscope 2.

[0082] The water delivery container 7 is a container for storing liquids such as saline solution. By supplying pressurized gas to the water delivery container 7 from the air and water delivery pump in the video processor 3, the liquid in the water delivery container 7 is transported to the air and water delivery channel.

[0083] The suction pump 6 is connected to the connector 2c1 via the suction tube 6a. The connector 2c1 connects the suction tube 6a to the suction channel inside the endoscope 2. The suction pump 6 is used to aspirate fluids, mucous membranes, etc., from the subject.

[0084] The video processor 3 controls the entire endoscope system 1, including the endoscope 2, suction pump 6, monitor 8, etc.

[0085] Figure 5 This is a block diagram showing the outline of the electrical structure of the endoscope 2, adapter 5, and video processor 3 in the first embodiment.

[0086] When the adapter 5 is connected to the video processor 3, it receives power from the video processor 3 and operates. Additionally, the endoscope 2 receives power from the adapter 5, which is connected to the video processor 3, and operates accordingly.

[0087] The endoscope 2 has an image sensor 21 and a ROM 22 (memory).

[0088] Image sensor 21 receives power from the image sensor and is driven by the image sensor drive signal. When image sensor 21 is driven to capture images, it sends image signals to adapter 5.

[0089] ROM 22 non-volatilely stores discrimination information related to endoscope 2. The discrimination information includes device discrimination information (information associated with the device model) and sensor discrimination information (information associated with the type of image sensor possessed by the device). Specifically, the device discrimination information is the device model information of endoscope 2, and the sensor discrimination information is information indicating the type of image sensor 21. ROM 22 sends the discrimination information to adapter 5.

[0090] The adapter 5 includes an FPGA (Field Programmable Gate Array) 51, a ROM 52, a driver circuit for the image sensor 53, a power supply circuit for the image sensor 54 (power supply circuit), and an image receiving circuit 55.

[0091] ROM 52 is a non-volatile storage device (memory) that stores the processing program that enables FPGA 51 to function as various circuits. ROM 52 also non-volatilely stores parameters, data, etc. required for processing.

[0092] Furthermore, while FPGA 51 is used as an example of the processor for performing the processing, it is not limited to this; an ASIC (Application Specific Integrated Circuit) including a CPU (Central Processing Unit) may also be used. Additionally, the memory is not limited to ROM 52; RAM or the like may also be included. Moreover, at least a portion of the circuits within FPGA 51 or within adapter 5 may be configured as dedicated electronic circuits.

[0093] The FPGA 51 includes a discrimination circuit 51c (discrimination signal receiving circuit), a control circuit 51a, and an image signal processing circuit 51b as the various circuits that perform the functions.

[0094] The discrimination circuit 51c communicates with the ROM 22 within the endoscope 2 and reads discrimination information. The discrimination circuit 51c receives from the ROM 22 a signal containing information related to the model of the endoscope 2 (a discrimination signal related to the model of the insertion device). The discrimination circuit 51c also receives from the ROM 22 a signal containing information related to the type of image sensor 21 provided with the endoscope 2 (a second discrimination signal related to the type of image sensor provided with the insertion device). Furthermore, the discrimination circuit 51c determines the model of the endoscope 2 based on the discrimination signal and determines the type of image sensor 21 based on the second discrimination signal.

[0095] At this time, if the control circuit 51a does not receive a discrimination signal (model discrimination information) from the discrimination circuit 51c, it determines that the endoscope 2 is not connected to the adapter 5. In a more precise discrimination case, the control circuit 51a can also determine that the endoscope 2 is not connected to the adapter 5 even if it does not receive both the discrimination signal (model discrimination information) and the second discrimination signal (sensor discrimination information) from the discrimination circuit 51c.

[0096] When connector 5a is connected to video processor 3 and connector 5b is not connected to endoscope 2 (when discrimination circuit 51c does not receive a discrimination signal), control circuit 51a functions as a switching circuit, causing image sensor power supply circuit 54 to cut off power supply to endoscope 2. Therefore, no power is supplied to image sensor 21 of endoscope 2 via connector 5b.

[0097] Therefore, when the endoscope 2 is not connected, no current will flow even if it comes into contact with the connector 5b of the adapter 5 connected to the video processor 3. Furthermore, even after the adapter 5 is connected to the video processor 3, the connector 5b will not be under power supply, even if the endoscope 2 is connected to the adapter 5. Therefore, the endoscope 2 containing the image sensor 21 will not be accidentally (i.e., without a series of power-on procedures) supplied with power. Thus, damage to the endoscope 2 containing the image sensor 21 due to excessive current or the like can be prevented.

[0098] Furthermore, when the control circuit 51a receives a discrimination signal (model discrimination information) from the discrimination circuit 51c, it determines that the endoscope 2 is connected to the adapter 5. At this time, the control circuit 51a also receives a second discrimination signal (sensor discrimination information) to determine the type of image sensor 21.

[0099] When connector 5a is connected to video processor 3 and connector 5b is connected to endoscope 2 (when discrimination circuit 51c receives discrimination signal), control circuit 51a enables image sensor to supply power to endoscope 2 via power supply circuit 54.

[0100] The control circuit 51a generates an action switching signal based on the sensor discrimination information. The control circuit 51a sends the action switching signal to the image sensor power supply circuit 54, the image sensor drive circuit 53, and the image signal processing circuit 51b.

[0101] The image sensor power supply circuit 54, based on the action switching signal, converts the power supplied from the power supply circuit 32 of the video processor 3 into power corresponding to the image sensor 21 of the disposable endoscope 2 (image sensor power) and supplies it to the endoscope 2. Here, the power supplied from the power supply circuit 32 is the power corresponding to the reusable endoscope 2A. The image sensor power supply circuit 54 supplies the converted power to the image sensor 21 of the endoscope 2.

[0102] The image sensor drive circuit 53 switches the image sensor drive signal (including synchronization and drive signals) to a drive signal suitable for the image sensor 21 according to the action switching signal. The image sensor drive circuit 53 outputs the image sensor drive signal to the image sensor 21, driving the image sensor 21. As a result, an image signal is output from the image sensor 21.

[0103] When the image sensor 21 is driven, the image receiving circuit 55 receives image signals from the image sensor 21. The image receiving circuit 55 then sends the received image signals to the image signal processing circuit 51b.

[0104] The image signal processing circuit 51b performs signal format conversion processing based on the action switching signal (i.e., based on the type of image sensor 21 determined based on the second discrimination signal). Then, the image signal processing circuit 51b receives the image signal, converts the received image signal into an image signal in a signal format that the video processor 3 can process, and outputs it to the video processor 3.

[0105] The ROM 52 stores, for example, conversion processing programs for multiple signal formats corresponding to combinations of various image sensors 21 for multiple models of disposable endoscopes 2 and multiple models of reusable endoscopes 2A that can be connected to the video processor 3. The image signal processing circuit 51b selects the signal format conversion processing program according to the action switching signal, thereby switching the processing.

[0106] The image signal processing circuit 51b converts the format of the image signal using a pre-defined conversion process. The format converted here is the same as that of the image signal output from the reusable endoscope 2A. The image signal processing circuit 51b then sends the format-converted image signal to the image processing circuit 31 of the video processor 3. The image processing circuit 31 performs the same processing on the received image signal as it does on the image signal received from the reusable endoscope 2A.

[0107] As described above, even when the adapter 5 is connected to the video processor 3 and the adapter 5 is temporarily receiving power from the video processor 3, the control circuit 51a cuts off the power supply to the endoscope 2 via the connector 5b via the image sensor power supply circuit 54 when the endoscope 2 is not connected to the adapter 5. Therefore, this constitutes a safety design that prevents power supply to the connector 5b even when it is exposed externally. Hereinafter, refer to... Figures 6-8 The preferred structure for further improving safety is described.

[0108] Figure 6 It is a graph showing the presence or absence of connection detection and power supply corresponding to the connection status of the endoscope 2, adapter 5 and video processor 3 in the first embodiment.

[0109] like Figure 6 As shown in column A, when the video processor 3 is connected to the adapter 5 and the adapter 5 is connected to the endoscope 2, the adapter 5 detects that the disposable endoscope 2 is connected. Furthermore, the video processor 3, through the process described later... Figure 7 The structure shown indicates that a reusable endoscope 2A is connected. In this case, the video processor 3 supplies power from the power supply circuit 32 (power on) and executes the endoscope's power-on procedure.

[0110] like Figure 6 As shown in column B, when the video processor 3 is connected to the adapter 5 but the adapter 5 is not connected to the endoscope 2, the adapter 5 cannot detect the connection of the disposable endoscope 2. Therefore, the video processor 3, through the process described later... Figure 8 The structure shown indicates that the reusable endoscope 2A is not connected. In this case, the video processor 3 does not supply power from the power supply circuit 32 (power on) and does not execute the endoscope power-on procedure.

[0111] Furthermore, even if adapter 5 is connected to endoscope 2, no power supply is made from video processor 3 to adapter 5 (and endoscope 2) if video processor 3 is not connected to adapter 5. Therefore, adapter 5 cannot detect the connection of endoscope 2. And, of course, video processor 3 also detects that endoscope 2A is not connected.

[0112] Figure 7 This is a diagram illustrating a structural example of a connection detection circuit for a disposable endoscope 2 and an adapter 5 used by the video processor 3 to detect the connection of the reusable endoscope 2A in the first embodiment. Figure 8 This is a diagram illustrating an example of the connection detection circuit of the video processor 3 and the adapter 5 when the disposable endoscope 2 is not connected, as shown in the first embodiment.

[0113] exist Figure 5 Based on the structure shown, the video processor 3 also includes an endoscope connection detection circuit 33a (connection detection circuit) and an endoscope model discrimination circuit 33b (insertion device discrimination circuit).

[0114] The adapter 5 has a first wiring L1 and a second wiring L2. One end of the first wiring L1 is connected to the endoscope connection detection circuit 33a of the video processor 3 via connector 5a (first connector). The other end of the first wiring L1 is connected to one end of the third wiring L3 of the endoscope 2 via connector 5b (second connector).

[0115] One end of the second wiring L2 is grounded. The other end of the second wiring L2 is connected to the other end of the third wiring L3, which forms a loop inside the endoscope 2, via connector seat 5b (second connector).

[0116] like Figure 7 As shown, when the endoscope 2, adapter 5 and video processor 3 are connected, the endoscope connection detection circuit 33a is grounded via the first wiring L1, the third wiring L3 and the second wiring L2.

[0117] The endoscope connection detection circuit 33a monitors the voltage level of the connection detection signal. When the endoscope connection detection circuit 33a detects that the voltage level of the connection detection signal is at ground level, it detects that an endoscope is connected.

[0118] Therefore, the endoscope connection detection circuit 33a causes the endoscope model discrimination circuit 33b to discern the endoscope model as described below. Furthermore, the endoscope connection detection circuit 33a causes the power supply circuit 32 to execute a power-on procedure corresponding to the endoscope model. Thus, when the endoscope connection detection circuit 33a detects a ground fault, the video processor 3 supplies power to the adapter 5.

[0119] On the other hand, such as Figure 8 As shown, when adapter 5 is connected to video processor 3 but endoscope 2 is not connected, the voltage level of the connection detection signal becomes an open-circuit level, different from the ground level. Therefore, the endoscope connection detection circuit 33a does not detect grounding and detects that the endoscope is not connected. Consequently, the endoscope connection detection circuit 33a does not cause the power supply circuit 32 to execute the power-on procedure. Therefore, video processor 3 does not supply power to adapter 5.

[0120] Next, the endoscope model discrimination circuit 33b discriminates the endoscope model as follows.

[0121] Adapter 5 also includes a first resistor 56. For example, in Figure 7 In the structure, the first resistor 56 has resistors Ra and Rb connected in parallel.

[0122] The resistance value of the first resistor 56 is the same as the resistance value of other resistors in one of the multiple models of reusable endoscopes 2A (other insertion devices) that can be connected to the video processor 3.

[0123] The first resistor 56 is connected via connector 5a (first connector) to the endoscope model discrimination circuit 33b of the video processor 3. Figure 7 In the example, the resistors Ra and Rb connected in parallel are connected to the endoscope model discrimination circuit 33b, respectively.

[0124] When the endoscope model discrimination circuit 33b detects the first resistor 56, it determines the model of the endoscope connected to the video processor 3 based on the voltage value generated by the resistance value of the first resistor 56, etc. Figure 7 In the example, the endoscope model discrimination circuit 33b determines the endoscope model based on the voltage value generated by the resistance value of resistor Ra and the voltage value generated by the resistance value of resistor Rb.

[0125] As described above, the resistance value of the first resistor 56 is the same as the resistance values ​​of the other resistors present in the reusable endoscope 2A. Therefore, even though the endoscope 2 and the adapter 5 are actually connected, the endoscope model discrimination circuit 33b recognizes that the reusable endoscope 2A is connected to a model determined based on the voltage value generated by the resistance value.

[0126] Thus, the adapter 5 has a first resistor 56 with the same resistance value as the other resistors in the reusable endoscope 2A, thereby simulating that the reusable endoscope 2A is connected to the video processor 3.

[0127] Furthermore, the analog signal connected to the reusable endoscope 2A is not limited to the signal generated using the first resistor 56. For example, the analog signal can be sent from the ROM 52, or it can be sent from the adapter 5 to the video processor 3 using any other arbitrary technique.

[0128] The power supply circuit 32 of the video processor 3 supplies power to the reusable endoscope 2A for the model identified by the endoscope model identification circuit 33b.

[0129] The image sensor power supply circuit 54 converts the power supplied from the video processor 3 to the reusable endoscope 2A into power corresponding to the type of image sensor 21 within the disposable endoscope 2 (the type determined based on the second discrimination signal). The image sensor power supply circuit 54 then supplies the converted power to the endoscope 2.

[0130] According to this first embodiment, the circuit for converting the format of the image signal is provided in the adapter 5 disposed between the endoscope 2 and the video processor 3. Therefore, it is not necessary to provide the circuit for converting the format of the image signal in the endoscope 2. Therefore, the manufacturing cost of the disposable endoscope 2 can be reduced. In addition, since the adapter 5 can be reused, the operating cost can also be reduced.

[0131] The ROM 52 stores, for example, conversion processing programs for multiple signal formats corresponding to combinations of multiple models of disposable endoscopes 2 and multiple models of reusable endoscopes 2A. Therefore, by using only one adapter 5, multiple models of disposable endoscopes 2 can be connected to any one of the multiple models of reusable endoscopes 2A corresponding to the video processor 3.

[0132] Furthermore, the resistance value of the first resistor 56 in the adapter 5 is the same as the resistance values ​​of the other resistors in the reusable endoscope 2A. Therefore, the video processor 3 determines that the connected endoscope is a known model of the reusable endoscope 2A. Thus, the video processor 3 only needs to execute the usual operating procedures (including various operating procedures for power-on) when the reusable endoscope 2A is connected. Therefore, without making structural changes, the existing video processor 3 for the reusable endoscope 2A can be applied to the combination of the adapter 5 and the endoscope 2.

[0133] The adapter 5 converts the power supplied from the video processor 3 for the reusable endoscope 2A into power for the disposable endoscope 2 and supplies it. Therefore, even if the endoscope 2 consumes a different type of power than the reusable endoscope 2A, the endoscope 2 can still perform normal operations.

[0134] The endoscope model discrimination circuit 33b of the video processor 3 is connected to the adapter 5 via connector 5a, but not to the endoscope 2. Therefore, the number of signal lines at the interface between the endoscope 2 and the adapter 5 can be reduced, simplifying the structure of the connector 2c1 of the endoscope 2 and the connector base 5b of the adapter 5. This reduces the cost of the disposable endoscope 2.

[0135] When the endoscope 2 is not connected to the adapter 5, the control circuit 51a functions as a switching circuit, causing the image sensor power supply circuit 54 to cut off the power supply to the endoscope 2. Therefore, no power is supplied to the image sensor 21 of the endoscope 2 via the connector 5b.

[0136] Therefore, after the adapter 5 is connected to the video processor 3, even if the endoscope 2 is connected to the adapter 5, excessive current will not be supplied to the endoscope 2, thus preventing damage to the endoscope 2, including the image sensor 21. Furthermore, when the endoscope 2 is not connected, no current will flow even if it comes into contact with the connector 5b of the adapter 5 connected to the video processor 3.

[0137] Furthermore, the endoscope connection detection circuit 33a, configured as the video processor 3, detects grounding via the first wiring L1 of the adapter 5, the third wiring L3 forming a loop within the endoscope 2, and the second wiring L2 of the adapter 5. Therefore, if the adapter 5 is connected to the video processor 3 but not to the endoscope 2, the endoscope connection detection circuit 33a detects that the endoscope is not connected. Consequently, the video processor 3 does not execute the power-on procedure and does not supply power to the adapter 5.

[0138] Here, assuming a configuration where power is supplied to the video processor 3 even when only the adapter 5 is connected, the endoscope 2 is not actually connected, and therefore the necessary response for the supplied power cannot be obtained. Consequently, the video processor 3 may supply excessive current or determine that the power-on procedure is malfunctioning.

[0139] In contrast, according to this embodiment, the video processor 3 does not execute the endoscope power-on procedure and does not supply power to the endoscope when no connection to the endoscope is detected. Therefore, the video processor 3 will not be in a state where it determines an abnormality in the power-on procedure.

[0140] [Second Implementation]

[0141] Figure 9 This is a block diagram illustrating the outline of the electrical structure of the endoscope 2, adapter 5, and video processor 3 according to the second embodiment of the present invention. In the second embodiment, the same reference numerals are used for the same parts as in the first embodiment, and descriptions are omitted where appropriate. In the second embodiment, the differences from the first embodiment will be mainly described.

[0142] In the first embodiment, the discrimination information stored in the ROM 22 is read, and the discrimination circuit 51c determines the model of the endoscope 2 and the type of the image sensor 21, etc. In contrast, in this embodiment, a resistor is provided in the disposable endoscope 2 instead of the ROM 22, and the discrimination information is obtained based on the resistance value.

[0143] The FPGA 51 of adapter 5 has an image sensor discrimination circuit 51c1 and an endoscope model discrimination circuit 51c2 as specific components of the discrimination circuit 51c (discrimination signal receiving circuit).

[0144] The disposable endoscope 2 includes a second resistor 22b with a second resistance value and a third resistor 22a with a third resistance value. One end of the third resistor 22a is grounded, and the other end is connected to the image sensor discrimination circuit 51c1 via an image sensor detection line. One end of the second resistor 22b is grounded, and the other end is connected to the endoscope model discrimination circuit 51c2 via a model detection line. The image sensor detection line and the model detection line connect the endoscope 2 to the adapter 5 via a connector 5b.

[0145] For example in Figure 9 In the structure, the second resistor 22b has resistors R1 and R2 connected in parallel. The parallel resistors R1 and R2 are respectively connected to the endoscope model discrimination circuit 51c2. Additionally, the third resistor 22a has resistors R3 and R4 connected in parallel. The parallel resistors R3 and R4 are respectively connected to the image sensor discrimination circuit 51c1.

[0146] The ROM 52 of the adapter 5 is a memory that stores first information indicating the association between the second resistance value and the model of the endoscope 2. The ROM 52 also stores second information indicating the association between the third resistance value and the type of image sensor 21. The first and second information are stored in the ROM 52, for example, as their respective tables.

[0147] The endoscope model identification circuit 51c2 receives, for example, a voltage value generated by the second resistance value of the second resistor 22b as a identification signal (model identification information). The endoscope model identification circuit 51c2 identifies the model of the endoscope 2 based on the identification signal (model identification information) and the first information in the ROM 52. In this case, the first information includes information indicating the association between the voltage value generated by the second resistance value and the model of the endoscope 2.

[0148] The image sensor discrimination circuit 51c1 receives, for example, a voltage value generated by the third resistance value of the third resistor 22a as a second discrimination signal. Based on the second discrimination signal and the second information of the ROM 52, the image sensor discrimination circuit 51c1 determines the type of the image sensor 21. In this case, the second information includes information indicating the correlation between the voltage value generated by the third resistance value and the type of the image sensor 21.

[0149] According to this second embodiment, the effect is substantially the same as that of the first embodiment described above.

[0150] Furthermore, according to the second embodiment, a second resistor 22b and a third resistor 22a can be provided in the disposable endoscope 2 instead of a ROM 22. Therefore, component costs and the number of components can be reduced, further lowering the manufacturing cost of the disposable endoscope 2.

[0151] [Third Implementation Method]

[0152] Figure 10 This is a block diagram illustrating the outline of the electrical structure of the endoscope 2, adapter 5, and video processor 3 according to a third embodiment of the present invention. In the third embodiment, the same reference numerals are used for parts that are the same as in the first and second embodiments, and descriptions are omitted where appropriate. In the third embodiment, the differences from the first and second embodiments are mainly described.

[0153] Similar to the second embodiment, the discrimination circuit 51c (discrimination signal receiving circuit) includes an image sensor discrimination circuit 51c1 and an endoscope model discrimination circuit 51c2.

[0154] The endoscope 2 includes a ROM 22 and a third resistor 22a. The ROM 22 is connected to the endoscope model discrimination circuit 51c2. The ROM 22 contains model discrimination information (model information of the endoscope 2) as discrimination information. The third resistor 22a is connected to the image sensor discrimination circuit 51c1. As described above, the third resistor 22a has a third resistance value for discriminating the type of image sensor 21.

[0155] In the first and second embodiments, the adapter 5 has the ROM 52 located outside the FPGA 51, but in this embodiment, the adapter 5 has the ROM 52 located inside the FPGA 51.

[0156] Furthermore, in the first and second embodiments, the adapter 5 drives the image sensor 21 via an image sensor drive circuit 53 located outside the FPGA 51. In contrast, the adapter 5 of this embodiment houses a drive signal generation circuit 53a and a synchronization signal generation circuit 53b, corresponding to the image sensor drive circuit 53, within the FPGA 51. The drive signal generation circuit 53a generates a drive signal and sends it to the endoscope 2. The synchronization signal generation circuit 53b generates a synchronization signal and sends it to the endoscope 2.

[0157] That is, in this embodiment, the FPGA 51 becomes the structure that drives the image sensor 21, so there is no need to set up a separate driving circuit with the FPGA 51, which makes the structure of the adapter 5 simpler.

[0158] The image sensor power supply circuit 54 of the adapter 5 converts the power supplied from the power supply circuit 32 of the video processor 3 into power corresponding to a standard endoscope (standard insertion device) with a cable of the first length and supplies it. Here, the standard endoscope is one of the multiple models of disposable endoscopes 2 that the adapter 5 can handle.

[0159] The image sensor power supply circuit 54 includes a first power generation circuit 54a, a second power generation circuit 54b, and a third power generation circuit 54c. The first power generation circuit 54a, the second power generation circuit 54b, and the third power generation circuit 54c are each configured as, for example, LDO (Low Dropout) regulators. By using LDO regulators, the first power generation circuit 54a, the second power generation circuit 54b, and the third power generation circuit 54c can obtain the desired output voltage even when the input-output voltage difference (dropout) is small.

[0160] The disposable endoscope 2 also includes a voltage adjustment circuit 23, a cable loss simulation circuit 24, and a camera cable 25.

[0161] The voltage adjustment circuit 23 includes a first voltage adjustment circuit 23a connected to the first power generation circuit 54a, a second voltage adjustment circuit 23b connected to the second power generation circuit 54b, and a third voltage adjustment circuit 23c connected to the third power generation circuit 54c.

[0162] The first voltage adjustment circuit 23a adjusts the voltage of the power from the first power generation circuit 54a and supplies it to the image sensor 21.

[0163] The second voltage adjustment circuit 23b adjusts the voltage of the power from the second power generation circuit 54b and supplies it to the image sensor 21.

[0164] The third voltage adjustment circuit 23c adjusts the voltage of the power from the third power generation circuit 54c and supplies it to the image sensor 21.

[0165] The cable loss simulation circuit 24 is connected to the drive signal generation circuit 53a, the synchronization signal generation circuit 53b, the image receiving circuit 55, and the voltage adjustment circuit 23. The cable loss simulation circuit 24 is also connected to the image sensor 21 via the camera cable 25.

[0166] The camera cable 25 transmits power, supplied via connector 5b and with voltage adjusted by voltage adjustment circuit 23, to image sensor 21. Additionally, the camera cable 25 transmits drive signals from drive signal generation circuit 53a and synchronization signals from synchronization signal generation circuit 53b to image sensor 21. Furthermore, the camera cable 25 transmits image signals from image sensor 21 to image receiving circuit 55.

[0167] The camera cable 25 of the endoscope 2 has a second length. This second length of the camera cable 25 of the endoscope 2 is typically different from the first length of the cable in a standard endoscope. That is, the length of the endoscope 2 varies depending on the model, and the length of the camera cable 25 varies accordingly.

[0168] Therefore, the voltage adjustment circuit 23 adjusts the difference in power caused by the difference between the second length and the first length.

[0169] Furthermore, if the lengths of the camera cables 25 are different, the signal transmission losses caused by the camera cables 25 will be different. If the signal transmission losses are different, the circuitry in the adapter 5 may not be able to drive all models of endoscopes 2. Therefore, by providing a cable loss simulation circuit 24 in the endoscope 2, the differences in signal transmission losses caused by the differences in the lengths of the camera cables 25 are compensated. Thus, the cable loss simulation circuit 24 compensates for the transmission losses of power, drive signals, synchronization signals, and image signals.

[0170] According to this third embodiment, the effect is substantially the same as that of the first and second embodiments described above.

[0171] Furthermore, according to the third embodiment, multiple models of endoscopes 2 with significantly different lengths of camera cables 25 can be connected via a single adapter 5. Therefore, the versatility of the adapter 5 is improved.

[0172] [Fourth Implementation Method]

[0173] Figure 11 This is a diagram illustrating a structural example of the endoscope system 1 according to the fourth embodiment of the present invention. In the fourth embodiment, the same reference numerals are used for parts that are the same as in the first to third embodiments, and descriptions are omitted where appropriate. In the fourth embodiment, the differences from the first to third embodiments will be mainly described.

[0174] Figure 11 Several structural examples of an endoscope system 1 constructed using a disposable endoscope 2 are shown.

[0175] exist Figure 11 In columns A through C, the solid arrows pointing left indicate clock, synchronization signals, and control communications. The solid arrows pointing right indicate video signals and control communications. Specifically, the solid arrow pointing right to monitor 4 indicates the video signal. The dashed arrow pointing left indicates illumination.

[0176] Figure 11In the first structural example shown in column A, the video processor 3 is the built-in light source type described in the above embodiments. The disposable endoscope 2 is connected to the video processor 3 via adapter 5. Adapter 5 receives and transmits power signals with the endoscope 2 and the video processor 3. The video processor 3 supplies illumination light to the endoscope 2 via adapter 5. Adapter 5 receives image signals from the endoscope 2 and processes them using image signal processing circuit 51b. The video processor 3 receives image signals from adapter 5. The video processor 3 processes the image signals received from adapter 5 using image processing circuit 31 and outputs image signals to monitor 4.

[0177] exist Figure 11 In the second structural example shown in column B, the light source device 3B and the video processor 3A are arranged separately. The disposable endoscope 2 is connected in series to the light source device 3B and the video processor 3A via an adapter 5. The light source device 3B supplies illumination light to the endoscope 2 via the adapter 5. The light source device 3B relays electrical signals from the video processor 3 to the adapter 5 via electrical contacts. Additionally, the light source device 3B relays electrical signals from the adapter 5 to the video processor 3 via electrical contacts. Thus, the video processor 3 receives image signals from the adapter 5 via the light source device 3B. The video processor 3 processes the image signals received from the adapter 5 using the image processing circuit 31 and outputs image signals to the monitor 4.

[0178] exist Figure 11 In the third structural example shown in column C, the light source device 3B and the video processor 3A are separately arranged. The adapter 5 is connected to both the light source device 3B and the video processor 3A. That is, the light source device 3B and the video processor 3A are connected in parallel with respect to the adapter 5. The light source device 3B supplies illumination light to the endoscope 2 via the adapter 5. The adapter 5 receives and transmits power signals with the video processor 3A via electrical contacts. For example, the adapter 5 receives power from the video processor 3. In addition, the video processor 3 receives image signals from the adapter 5. The video processor 3 processes the image signals received from the adapter 5 using the image processing circuit 31 and outputs the image signals to the monitor 4.

[0179] In the first to third structural examples, the adapter 5 receives illumination light from the light source or light source device 3B within the video processor 3 and receives electrical signals from the video processor 3. Furthermore, the adapter 5 supplies illumination light to the endoscope 2 and drives the endoscope 2 via electrical signals. Additionally, the adapter 5 transmits image signals from the endoscope 2 to the video processors 3 and 3A. Therefore, the adapter 5 has both an optical path for transmitting illumination light and a signal line for transmitting electrical signals.

[0180] Furthermore, the built-in light source type video processor 3 in the first structural example constitutes a processor for performing endoscope-related processing. Additionally, the combination of the light source device 3B and the video processor 3A in the second and third structural examples also constitutes a processor for performing endoscope-related processing.

[0181] According to this fourth embodiment, regardless of which of the first to third structural examples is used, it achieves roughly the same effect as the first to third embodiments described above.

[0182] [Fifth Implementation]

[0183] Figure 12 This is a diagram illustrating a structural example of the endoscope system 1 according to the fifth embodiment of the present invention. In the fifth embodiment, the same reference numerals are used for parts that are the same as in the first to fourth embodiments, and descriptions are omitted as appropriate. In the fifth embodiment, the differences from the first to fourth embodiments will be mainly described.

[0184] The video processor 3 is, for example, a built-in light source type, with a built-in light source 35. The video processor 3 also includes a brightness detection circuit 34a, a brightness control circuit 34b, and a user interface 36.

[0185] The image processing circuit 31 sends any one of the image signal received from the image signal processing circuit 51b, the signal obtained after performing some image processing on the received image signal, or the image signal obtained after performing image processing on the image signal to the brightness detection circuit 34a.

[0186] The brightness detection circuit 34a detects the brightness of the subject based on the signal received from the image processing circuit 31 and generates brightness information. The brightness detection circuit 34a sends the generated brightness information to the brightness control circuit 34b.

[0187] Brightness control circuit 34b is connected to user interface 36. The user uses user interface 36 of video processor 3 to set the target brightness of the subject. In addition, user interface 36 can also perform other settings related to endoscope system 1.

[0188] The target brightness set via user interface 36 is input to brightness control circuit 34b. Brightness control circuit 34b generates a light source control signal and an electronic shutter control signal to make the subject reach the target brightness. Brightness control circuit 34b sends the light source control signal to light source 35 and the electronic shutter control signal to image sensor 21.

[0189] The light source 35 adjusts the brightness of the illumination light based on the light source control signal received from the brightness control circuit 34b, and emits the adjusted illumination light. The emitted illumination light is transmitted to the endoscope 2 via the adapter 5.

[0190] Image sensor 21 sets the exposure time based on the electronic shutter control signal received from brightness control circuit 34b. Then, image sensor 21 performs photoelectric conversion of the exposure time on the optical image of the subject illuminated by the illumination light to generate an image signal. Image sensor 21 sends the generated image signal to image signal processing circuit 51b.

[0191] The image signal processing circuit 51b converts the format of the image signal based on the discrimination information read from the ROM 22 and sends it to the image processing circuit 31.

[0192] In addition, such as Figure 7 and Figure 8 As illustrated, adapter 5 sends a signal to video processor 3 simulating the connection of the reusable endoscope 2A. However, adapter 5 may also send discrimination information read from ROM 22 to video processor 3.

[0193] In addition to format conversion for sending to image processing circuit 31, image signal processing circuit 51b also performs image processing to generate image signals for display. For example, image signal processing circuit 51b can be connected to an external monitor 4' without going through video processor 3. Image signal processing circuit 51b sends the generated image signals for display to monitor 4'. Monitor 4' then displays the endoscopic image. Alternatively, monitor 4' can be disconnected, thus... Figure 12 The middle part is represented by a dashed line.

[0194] In addition, the image processing circuit 31 outputs the image signal obtained after image processing to the monitor 4. As a result, the monitor 4 also displays the endoscopic image.

[0195] Alternatively, the brightness information detected by the brightness detection circuit 34a and the target brightness set via the user interface 36 can be fed back to the image processing circuit 31. In this case, the image processing circuit 31 can also overlay the brightness information and the target brightness, for example, as an indicator onto the endoscope image. Thus, the indicator is displayed on the monitor 4 along with the endoscope image.

[0196] According to this fifth embodiment, the effect is substantially the same as that of the first to fourth embodiments described above.

[0197] Furthermore, according to the fifth embodiment, the adapter 5 has the function of outputting an image signal that can be displayed on the monitor 4', thus increasing the options for image output. Also, for example, if power is supplied to the adapter 5 from another power source, endoscopic images can be viewed even without the video processor 3.

[0198] Furthermore, according to the fifth embodiment, by using the user interface 36 provided in the video processor 3, the brightness of the illumination light, and thus the brightness of the object being examined, can be adjusted to the desired brightness.

[0199] In addition, Figure 12 The illustration shows an example of a user interface 36 located in the video processor 3, but it is not limited to this. For example, a touch panel serving as the user interface 36 could also be provided in the monitor 4, allowing the brightness of the illumination light to be adjusted by the brightness control circuit 34b via user operation of the touch panel. Furthermore, other image adjustments and other settings related to the endoscope system 1 could also be performed via operation of the touch panel.

[0200] [Sixth Implementation Method]

[0201] Figure 13 This is a diagram illustrating a structural example of the endoscope system 1 according to the sixth embodiment of the present invention. In the sixth embodiment, the same reference numerals are used for parts that are the same as in the first to fifth embodiments, and descriptions are omitted as appropriate. In the sixth embodiment, the differences from the first to fifth embodiments will be mainly described.

[0202] Figure 13 The endoscope system 1 shown is in Figure 12 The endoscope system 1 shown has an endoscope system with the following structure.

[0203] The endoscope 2 has an LED 26 as a light source at the front end 2a1 of the insertion part 2a.

[0204] The adapter 5 includes a brightness detection circuit 51d1, a brightness control circuit 51d2, and a user interface 57.

[0205] The image signal processing circuit 51b sends any one of the following to the brightness detection circuit 51d1: the image signal received from the image sensor 21, the image signal obtained by converting the format of the received image signal, or the image signal generated for display based on the image signal.

[0206] The brightness detection circuit 51d1 detects the brightness of the subject based on the signal received from the image signal processing circuit 51b and generates brightness information. The brightness detection circuit 51d1 sends the generated brightness information to the brightness control circuit 51d2.

[0207] Brightness control circuit 51d2 is connected to user interface 57. The user uses user interface 57 of adapter 5 to set the visual brightness of the subject. In addition, user interface 57 can also be configured to perform other settings related to endoscope system 1.

[0208] The target brightness set via user interface 57 is input to brightness control circuit 51d2. Brightness control circuit 51d2 adjusts the drive current of LED 26 to achieve the target brightness for the subject, for example, through pulse width modulation. Furthermore, brightness control circuit 51d2 generates an electronic shutter control signal to achieve the target brightness for the subject. Brightness control circuit 51d2 outputs the adjusted drive current to LED 26 and sends the electronic shutter control signal to image sensor 21.

[0209] LED 26 receives a driving current and emits illumination light. The emitted illumination light is directed onto the subject from the front end 2a1.

[0210] Image sensor 21 sets the exposure time based on the electronic shutter control signal received from brightness control circuit 51d2. Then, image sensor 21 performs photoelectric conversion of the exposure time on the optical image of the subject illuminated by the illumination light to generate an image signal. Image sensor 21 sends the generated image signal to image signal processing circuit 51b.

[0211] In this embodiment, the illumination light is adjusted by the endoscope 2 and the adapter 5. Therefore, the brightness detection circuit 34a, brightness control circuit 34b, light source 35, and user interface 36 of the video processor 3 are not used for adjusting the illumination light. Figure 13 The dashed line indicates this. However, user interface 36 can also be used for purposes other than adjusting the lighting.

[0212] Additionally, if the video processor 3 is configured to start supplying illumination light by detecting the light source connector on the endoscope side, illumination light can be prevented from being emitted from the video processor 3 by making the length of the light source connector in the connector 5a of the adapter 5 different from the usual length (e.g., shorter than usual, so that the video processor 3 cannot detect the light source connector).

[0213] Alternatively, a mechanism for reducing the light intensity of illumination emitted from the video processor 3 can be provided in adapter 5. This light-reducing mechanism prevents heat generation caused by illumination within adapter 5 and light leakage from within adapter 5.

[0214] Furthermore, the brightness information detected by the brightness detection circuit 51d1 and the target brightness set through the user interface 57 can be fed back to the image signal processing circuit 51b. In this case, the image signal processing circuit 51b can superimpose the brightness information and target brightness as an indicator onto the endoscopic image. Thus, the indicator is displayed on the monitor 4' along with the endoscopic image. Alternatively, the image signal processing circuit 51b can also send the image signal with the indicator superimposed to the image processing circuit 31, so that the monitor 4 also displays the indicator.

[0215] exist Figure 13 The diagram shows a structural example where an LED 26 is provided at the front end 2a1 of the endoscope 2, but it is not limited to the front end 2a1. The LED 26 may also be provided at the operation part 2b or connector 2c1, etc., and transmitted through the light guide at the front end 2a1. Furthermore, it may be configured such that the light source such as the LED 26 is provided at the adapter 5, and illumination light is supplied from the adapter 5 to the endoscope 2.

[0216] In addition, the user interface 57 is not limited to being located on the adapter 5, but can also be located on the endoscope 2.

[0217] According to this sixth embodiment, the effect is substantially the same as that of the first to fifth embodiments described above.

[0218] Furthermore, according to the sixth embodiment, when the disposable endoscope 2 or adapter 5 is equipped with a light source such as LED 26, the brightness of the illumination light can also be adjusted.

[0219] [Seventh Implementation Method]

[0220] Figures 14 to 18 This represents the seventh embodiment of the present invention. Figure 14 This is a diagram showing the structure of the light guide within the endoscope 2 and adapter 5 in the endoscope system 1 according to the seventh embodiment. In the seventh embodiment, the same reference numerals are used for parts that are the same as in the first to sixth embodiments, and descriptions are omitted where appropriate. In the seventh embodiment, the differences from the first to sixth embodiments will be mainly explained.

[0221] like Figure 14 As shown in column A, the adapter 5 has a glass light guide (glass LG) 11 as a light guide to relay the illumination light emitted by the light source 35 of the video processor 3 to the endoscope 2.

[0222] The glass LG11 allows illumination light supplied from the light source 35 of the video processor 3 to enter through the connector 5a and guide the illumination light, and then directs the illumination light towards the endoscope 2 through the connector seat 5b. By using the glass LG11, heat resistance can be improved.

[0223] Furthermore, since glass LG11 is used in the adapter 5 located between the video processor 3 and the endoscope 2, as will be described later, it is possible to prevent the plastic light guide (PLG) 81 located on the side of the endoscope 2 from melting, burning, discoloring, and deforming due to the heat from the illumination light transmitted from the high-output light source 35.

[0224] Glass LG11, for example, as described later Figure 17As shown, it includes a glass fiber bundle consisting of multiple wires 11a made of glass fiber bundled together. By making the glass LG11 a glass fiber bundle instead of a glass rod, the degree of freedom in the arrangement of components within the adapter 5 is increased. As a result, it is possible to suppress the enlargement of the adapter 5.

[0225] Endoscope 2 has a plastic light guide (PLG) 81. PLG 81 is a second light guide that guides the illumination light incident from the glass LG11 of adapter 5 to, for example, the tip of endoscope 2.

[0226] Figure 15 This is a diagram showing the structure of glass LG11 and PLG 81 in the seventh embodiment.

[0227] like Figure 15 As shown in column B, the PLG 81 comprises a bundle of resin fibers consisting of multiple (e.g., fewer than 20) strands of transparent resin fiber wire 81a bundled together. The wire 81a is, for example, a light guide made of plastic with a diameter of several hundred μm. Therefore, compared to the case using a glass LG, it offers superior flexibility and a high degree of freedom in its placement within the endoscope 2. Furthermore, compared to the case where the PLG 81 is composed of a single wire with a diameter larger than that of the wire 81a, its superior flexibility allows for suppression of light reduction at bends.

[0228] By constructing PLG 81 from 20 or fewer wires 81a, the anti-friction agent can be applied as is required in cases where the fiber bundle consists of hundreds to thousands of optical fibers, thus reducing manufacturing costs.

[0229] Furthermore, PLG is cheaper than LG glass, thus reducing the manufacturing cost of endoscope 2. Therefore, it becomes a suitable structure for disposable endoscope 2 where cost reduction is desired.

[0230] Each wire 81a is formed from a plastic material with a melting point of, for example, 85°C or higher. This prevents the wire 81a from melting, burning, discoloration, or deformation caused by illumination.

[0231] like Figure 14 As shown in column B, the light guide connector 82 of the connector 2c1 of the endoscope 2 can be attached to and detached from the light guide seat 12 of the connector seat 5b of the adapter 5. Therefore, multiple models of endoscopes 2 can be connected to the same adapter 5.

[0232] like Figure 15 As shown in column C, when aligning glass LG11 with PLG 81, an eccentricity deviation δ (optical axis offset) sometimes occurs between the optical axis (central axis) O1 of PLG 81 and the optical axis (central axis) O2 of glass LG11. Consequently, due to this eccentricity deviation δ, the transmission efficiency of the illumination light may sometimes decrease. See below for further details. Figures 16-18The structure for suppressing the reduction in transmission efficiency of such illumination light is described.

[0233] like Figure 14 As shown in column C, the PLG 81 bends laterally at the front end 2a1 of the endoscope 2, for example, so that illumination light is emitted from the illumination lens 83 disposed on the side of the front end 2a1 toward the subject. The illumination lens 83 is, for example, composed of a single concave lens. By composing the illumination lens 83 with a single concave lens, costs can be reduced and the weight can be lightened.

[0234] Figure 15 The bending angle θx of PLG 81 shown in column A is less than 90°. That is, PLG 81 bends at the bending portion 81c at an angle greater than 90° (i.e., slightly rearward compared to the side).

[0235] Furthermore, by bending PLG 81 at an angle greater than 90° and using a concave lens as the illumination lens 83, it is possible to illuminate a larger area including a position further to the side and rear, without causing insufficient ambient light, and thus increasing the amount of illumination reaching the camera's field of view.

[0236] In addition, such as Figure 15 As shown in column A, the front end portion of PLG 81, including the bent portion 81c, is fixed to the frame 84 within the front end portion 2a1 using adhesive 85. At this time, adhesive 85 is applied to the straight portion of PLG 81, but not to the bent portion 81c. By adopting this structure, leakage of illumination light at the bent portion 81c can be suppressed, and the reduction in the amount of light emitted from the illumination lens 83 can be suppressed.

[0237] Compared to the case where the light source is located inside the endoscope 2, the light source 35 located inside the video processor 3 has fewer limitations regarding size, power, etc. Therefore, the light source 35 can include not only white light sources but also desired special light sources. In this way, by employing a structure that transmits illumination light emitted from the light source 35 located inside the video processor 3 through the glass LG11 of the adapter 5 and the PLG 81 of the endoscope 2, special light can be irradiated onto the subject in the disposable endoscope 2 for special light observation.

[0238] Figure 16 This is a diagram in the seventh embodiment used to illustrate the structure for suppressing the deviation in the transmission efficiency of illumination light from glass LG11 to PLG 81.

[0239] When the optical guide connector 82 and the optical guide base 12 are connected, the glass LG11 and PLG 81 are mated. The eccentricity deviation in the direction perpendicular to the optical axis O2 of the glass LG11 and the optical axis O1 of the PLG 81 is δ, as described above. Furthermore, the maximum value of the separation deviation between the glass LG11 and the PLG 81 in the optical axis O1, O2 directions is set as d. Additionally, the radius of the glass LG11 is set as r1, the radius of the PLG 81 is set as r2, and the numerical aperture of the PLG 81 is set as sinθ2. Furthermore, regarding numerical aperture (NA), more precisely, it is sinθ2 multiplied by the refractive index n of the medium; however, since the refractive index of air, the medium, is approximately 1, the numerical aperture is simply recorded as sinθ2.

[0240] At this time, the condition for suppressing the deviation in the transmission efficiency of the illumination light from glass LG11 to PLG 81 caused by the eccentric deviation δ is the following equation (1).

[0241] Δ≤d×tan(θ2)-(r1-r2)···(1)

[0242] Figure 16 Column A represents an example where r1 ≥ r2. In this case, the second term on the right side of equation (1) is negative, and the restriction on the eccentricity deviation δ becomes larger.

[0243] on the other hand, Figure 16 Column B represents an example where r1 < r2. In this case, the second term on the right side of equation (1) is positive, which alleviates the restriction on the eccentricity deviation δ. Thus, if r2 is increased, an improvement in the transmission efficiency of the illumination light can be expected. However, if only r2 is increased, the PLG 81 will become thicker, and the diameter of the insertion part 2a of the endoscope 2 will increase. Therefore, it is preferable to minimize the diameter r2 of the PLG 81 as much as possible by appropriately adjusting the parameters to satisfy equation (1).

[0244] Figure 17 These are diagrams used in the seventh embodiment to illustrate several embodiments of the glass LG11 and PLG 81.

[0245] Figure 17 Column A represents the first embodiment. The first embodiment is an example of PLG 81 composed of two wires 81a. The numerical data of the first embodiment are shown below.

[0246]

[0247] Figure 17 Column B represents the second embodiment. The second embodiment is an example of PLG 81 composed of four wires 81a. The numerical data of the second embodiment are shown below.

[0248]

[0249]

[0250] Figure 17 Column C represents the third embodiment. The third embodiment is an example of PLG 81 composed of 7 wires 81a. The numerical data of the third embodiment are shown below.

[0251]

[0252] To facilitate comparison of the various embodiments, parts in the second and third embodiments that differ from the first embodiment are marked with an asterisk (*). In each embodiment, Figure 17 The structure is the same as that of the LG11 glass. In addition, the numerical aperture of the LG11 glass is set to sinθ1.

[0253] Figure 18 This is a diagram of a structure used in the seventh embodiment to illustrate the structure for suppressing the deviation in the transmission efficiency of illumination light when the optical axis O2 of glass LG11 is tilted relative to the optical axis O1 of PLG 81.

[0254] The maximum value of the tilt angle of the optical axis O2 relative to the optical axis O1 when connecting the optical connector 82 and the optical guide seat 12 is set as θ0. Under the condition that the following equation (2) is satisfied,

[0255] θ1>(θ2+θ0)···(2)

[0256] The conditional formula for suppressing the deviation in the transmission efficiency of illumination light from glass LG11 to PLG 81 caused by the maximum value d of the deviation of the optical axis O1 and O2 directions of glass LG11 and PLG 81 and the maximum value θ0 of the tilt angle is as follows (3).

[0257] r1>r2+d×tan(θ2+θ0)···(3)

[0258] Therefore, the glass LG11, PLG 81, optical connector 82 and optical base 12 can be designed in a manner that satisfies equations (1) to (3).

[0259] According to this seventh embodiment, the effect is substantially the same as that of the first to sixth embodiments described above.

[0260] Furthermore, according to the seventh embodiment, deviations in the transmission efficiency of illumination light from glass LG11 to PLG 81 can be suppressed, reducing the loss of illumination light.

[0261] [Eighth Implementation Method]

[0262] Figure 19 and Figure 20 This represents the eighth embodiment of the present invention. Figure 19 This is a perspective view showing the internal structure of the connector 2c1 of the endoscope 2 in the eighth embodiment. In the eighth embodiment, the same reference numerals are used for parts that are the same as in the first to seventh embodiments, and descriptions are omitted where appropriate. In the eighth embodiment, the differences from the first to seventh embodiments will be mainly described.

[0263] The general cable 2c is equipped with a pipe 61 for supplying air and water, a pipe 62 for suction, a signal line 63, and a PLG 81, etc.

[0264] The connector 2c1 of the endoscope 2 includes: a connector body 41, which connects to the air / water supply channel conduit 61, the suction channel conduit 62, the signal line 63, and the PLG 81; and a connector cover, which has a mechanism for removably connecting to the connector seat 5b of the adapter 5. The connector cover covers the periphery of the front end side of the connector body 41.

[0265] The connector cover also includes a surge protection structure for electrostatic discharge protection. This surge protection structure is located on the circuit board 44 covering the connector body 41. The circuit board 44 is disposed, for example, at the lower surface end of the connector body 41.

[0266] Figure 20 This is a top view showing the structure of the circuit board 44 in the eighth embodiment. Figure 20 The circuit board 44 shown has printed wiring formed on it, and electrical components (illustrations of printed wiring and electrical components omitted) are mounted in connection with the printed wiring. Furthermore, as described above, no circuitry for converting the format of the image signal is provided on the circuit board 44. Therefore, miniaturization and cost reduction of the circuit board 44 are possible.

[0267] A signal pad 44a is provided at one end of the circuit board 44. Multiple electrical contacts are arranged on the signal pad 44a. These contacts are connected to the signal line 63 to transmit an electrical signal containing power. Furthermore, a ground pad 44b (grounding contact) is provided around the signal pad 44a, i.e., on its outer periphery, to cover the edge of the circuit board 44.

[0268] With the connector body 41 and connector cover assembled, the surge protector component is electrically connected to the grounding pad 44b. At this time, the opening of the signal pad 44a on the side connected to the connector seat 5b is surrounded by the surge protector component and the grounding pad 44b. The signal pad 44a is arranged on the inner side of the connector 2c1, and the grounding pad 44b and the surge protector component are arranged on the exposed side.

[0269] The lightning protection structure components and the grounding pad 44b are connected to the grounding circuit of the video processor 3 via the adapter 5.

[0270] According to this eighth embodiment, the effect is substantially the same as that of the first to seventh embodiments described above.

[0271] In addition, according to the eighth embodiment, a signal pad 44a is arranged on the inner side of the connector 2c1, and a grounding pad 44b and a lightning protection structure are arranged on the exposed side, so that static electricity can be prevented from affecting the image sensor 21 through the signal pad 44a.

[0272] Furthermore, while endoscopes were listed as insertion devices above, specifically the reusable endoscope 2A and the disposable endoscope 2, the insertion device is not limited to these. Other insertion devices may include treatment instruments or ultrasonic probes.

[0273] Furthermore, in the above text, an endoscope system 1 using an endoscope was cited as an example of an insertion device system, but it could also be an insertion device system using an insertion device other than an endoscope.

[0274] Furthermore, the present invention is not limited to the embodiments described above. The present invention can be specifically implemented by modifying the constituent elements during the implementation phase without departing from the spirit of the invention. In addition, various forms of the invention can be formed by appropriately combining the multiple constituent elements disclosed in the above embodiments. For example, some constituent elements may be deleted from all the constituent elements disclosed in the embodiments. Furthermore, constituent elements of different embodiments may be appropriately combined. Thus, various modifications and applications are naturally possible without departing from the spirit of the invention.

Claims

1. A relay adapter that relays data between a processor and a plug-in device, and includes: A first connector is connected to the processor; A second connector is connected to the insertion device; A power supply circuit that converts the power supplied from the processor into power corresponding to the insertion device and supplies it to the insertion device; The switching circuit, when the first connector is connected to the processor and the second connector is not connected to the insertion device, causes the power supply circuit to cut off the power supply to the insertion device; when the first connector is not connected to the processor and the second connector is connected to the insertion device, the switching circuit causes the power supply circuit to cut off the power supply to the insertion device; when the first connector is not connected to the processor and the second connector is not connected to the insertion device, the switching circuit causes the power supply circuit to cut off the power supply to the insertion device; when the first connector is connected to the processor and the second connector is connected to the insertion device, the switching circuit causes the power supply circuit to supply power to the insertion device. as well as A discrimination signal receiving circuit receives a discrimination signal associated with the model of the insertion device from the insertion device. When the discrimination signal receiving circuit does not receive the discrimination signal, the switching circuit causes the power supply circuit to cut off the power supply to the insertion device; when the discrimination signal receiving circuit receives the discrimination signal, the switching circuit causes the power supply circuit to resume power supply to the insertion device.

2. The repeater adapter according to claim 1, wherein, The repeater adapter also includes an image signal processing circuit that converts the image signal received from the image sensor of the insertion device into an image signal in a signal format that the processor can process, and outputs it to the processor. The discrimination signal receiving circuit also receives a second discrimination signal associated with the type of image sensor possessed by the insertion device. The image signal processing circuit converts the signal format of the image signal according to the type of image sensor determined based on the second discrimination signal.

3. The repeater adapter according to claim 2, wherein, The relay adapter also has a first resistor. The resistance value of the first resistor is the same as the resistance value of other resistors in other plug-in devices that can be connected to the processor. The first resistor is connected to the insertion device discrimination circuit of the processor via the first connector. The power supply circuit converts the power supplied from the processor to the other insertion devices identified by the insertion device discrimination circuit based on the resistance value of the first resistor into power corresponding to the type of the image sensor identified based on the second discrimination signal, and supplies it to the insertion device.

4. The repeater adapter according to claim 2, wherein, The discrimination signal is a signal indicating the model of the insertion device. The second discrimination signal is a signal indicating the type of the image sensor. The discrimination signal and the second discrimination signal are received from the memory of the insertion device.

5. The repeater adapter according to claim 2, wherein, The discrimination signal is received from a second resistor with a second resistance value provided by the insertion device. The second discrimination signal is received from a third resistor with a third resistance value provided by the insertion device. The repeater adapter also includes a memory that stores first information and second information, the first information representing the association between the second resistance value and the model of the inserted device, and the second information representing the association between the third resistance value and the type of the image sensor. The discrimination signal receiving circuit determines the model of the insertion device based on the discrimination signal and the first information, and determines the type of the image sensor based on the second discrimination signal and the second information.

6. The repeater adapter according to claim 1, wherein, The relay adapter also has a first wiring and a second wiring. One end of the first wiring is connected to the connection detection circuit of the processor via the first connector. The other end of the first wiring is connected to one end of the third wiring of the insertion device via the second connector. One end of the second wiring is grounded. The other end of the second wiring is connected via the second connector to the other end of the third wiring, which forms a loop within the insertion device.

7. The repeater adapter according to claim 1, wherein, The relay adapter also includes a light guide, through which illumination light supplied from a light source provided by the processor is incident and guided by the first connector, and then emitted to the insertion device via the second connector.

8. The repeater adapter according to claim 7, wherein, The optical guide comprises a bundle of glass fibers bound together.

9. An insertion device system comprising: An insertion device is inserted into the body being examined. A processor that supplies power to the insertion device and receives electrical signals from the insertion device; and A relay adapter that relays communication between the processor and the insertion device. The relay adapter includes: A first connector is connected to the processor; A second connector is connected to the insertion device; A power supply circuit that converts the power supplied from the processor into power corresponding to the insertion device and supplies it to the insertion device; The switching circuit, when the first connector is connected to the processor and the second connector is not connected to the insertion device, causes the power supply circuit to cut off the power supply to the insertion device; when the first connector is not connected to the processor and the second connector is connected to the insertion device, the switching circuit causes the power supply circuit to cut off the power supply to the insertion device; when the first connector is not connected to the processor and the second connector is not connected to the insertion device, the switching circuit causes the power supply circuit to cut off the power supply to the insertion device; when the first connector is connected to the processor and the second connector is connected to the insertion device, the switching circuit causes the power supply circuit to supply power to the insertion device. as well as A discrimination signal receiving circuit receives a discrimination signal associated with the model of the insertion device from the insertion device. When the discrimination signal receiving circuit does not receive the discrimination signal, the switching circuit causes the power supply circuit to cut off the power supply to the insertion device; when the discrimination signal receiving circuit receives the discrimination signal, the switching circuit causes the power supply circuit to resume power supply to the insertion device.

10. The insertion device system according to claim 9, wherein, The processor includes a connection detection circuit. The repeater adapter also includes a first wiring and a second wiring. The insertion device has a third wiring. One end of the first wiring is connected to the connection detection circuit via the first connector. The other end of the first wiring is connected to one end of the third wiring via the second connector. One end of the second wiring is grounded. The other end of the second wiring is connected via the second connector to the other end of the third wiring, which forms a loop within the insertion device. When the connection detection circuit detects a ground fault, the processor supplies power to the relay adapter. When the first connector is connected to the processor and the second connector is connected to the insertion device, the switching circuit enables the power supply circuit to supply power to the insertion device.

11. The insertion device system according to claim 9, wherein, The relay adapter also includes a first resistor. The resistance value of the first resistor is the same as the resistance value of other resistors in other plug-in devices that can be connected to the processor. The first resistor is connected to the insertion device discrimination circuit of the processor via the first connector. The discrimination signal receiving circuit also receives a second discrimination signal associated with the type of image sensor possessed by the insertion device. The power supply circuit converts the power supplied from the processor to the other insertion devices identified by the insertion device discrimination circuit based on the resistance value of the first resistor into power corresponding to the type of the image sensor identified based on the second discrimination signal, and supplies it to the insertion device.

12. The insertion device system according to claim 9, wherein, The power circuit of the relay adapter converts the power supplied by the processor into power corresponding to a standard insertion device with a cable of the first length and supplies it. The insertion device includes: A cable of a second length, which transmits power supplied via the second connector; and An adjustment circuit that adjusts the difference in electrical power caused by the difference between the second length and the first length.

13. The insertion device system according to claim 9, wherein, The relay adapter also includes a light guide, through which illumination light supplied from a light source provided by the processor is incident and guided by the first connector, and then emitted to the insertion device via the second connector.

14. The insertion device system according to claim 13, wherein, The optical guide comprises a bundle of glass fibers bound together. The insertion device includes a second light guide for guiding the illumination light emitted from the light guide. The second optical guide includes a resin fiber bundle consisting of multiple transparent resin fibers bound together. Let the radius of the first optical guide be r1, the radius of the second optical guide be r2, the numerical aperture of the second optical guide be sinθ2, the eccentricity deviation between the connected first and second optical guides be δ, and the maximum value of the separation deviation between the connected first and second optical guides in the optical axis direction be d, then the following relationship is satisfied: δ≤d×tan(θ2)-(r1-r2).

15. The insertion device system according to claim 9, wherein, The insertion device includes a third connector that connects to the second connector and has electrical contacts that transmit electrical signals containing the power. The third connector has a grounding contact around the electrical contact, which is connected to the processor's grounding circuit via the relay adapter.

16. The insertion device system according to claim 9, wherein, The insertion device is an endoscope.

17. The insertion device system according to claim 16, wherein, The endoscope is a disposable endoscope that is disposed of after a single use.

Images