Endoscope, endoscope system, and switching circuit member for endoscope

A switching circuit member for an endoscope, wherein the switching circuit member is configured to be coupled with a connector to be connected with an external device that performs signal processing, is configured to be electrically connected with each of a plurality of image pick up units to pick up an observation image, and is configured to switch the plurality of image pick up units so that one of the image pick up units transmits/receives at least one type of signal to/from the connector,

• characterized in that
• the switching circuit member includes a shield configured to avoid occurrence of noise in the signal transmitted/received between the plurality of image pick up units and the external device,
• each image pick up unit transmits/receives a plurality of types of signals to/from the external device, and
• the shield is configured to avoid mutual interference between the plurality of types of signals in the switching circuit member,
• wherein the plurality of types of signals include a high-frequency signal and a low-frequency signal,
• the switching circuit member further includes a flexible substrate including a plurality of surface portions wherein a signal line to electrically connect each image pick up unit with the switching circuit member and a connection pin to electrically connect the external device with the switching circuit member are configured to be connected to the plurality of surface portions,
• the plurality of surface portions include one surface portion wherein the signal line to transmit the high-frequency signal and the connection pin to transmit the high-frequency signal are configured to be connected to the one surface portion and a connection pattern provided in the one surface portion serves to transmit the high-frequency signal, and
• the plurality of surface portions include one surface portion wherein the signal line to transmit the low-frequency signal and the connection pin to transmit the low-frequency signal are configured to be connected to the one surface portion and a connection pattern provided in the one surface portion serves to transmit the low-frequency signal, and
• wherein one surface portion of the high-frequency signal is different from one surface portion of the low-frequency signal.