JP5041676B2 - Endoscope device and adapter for the endoscope - Google Patents

Description

  The present invention relates to an endoscope apparatus for observing a subject and an endoscope adapter for the endoscope apparatus.

  In recent years, in various fields such as the medical field and the industrial field, an elongated endoscope insertion part to be inserted into a subject, and an endoscope main body part that performs various operations by connecting the endoscope insertion part Are used. Among such endoscope apparatuses, those in which an endoscope adapter having an illumination unit or the like is detachably attached to the distal end of an endoscope insertion part are well known (for example, patents). Reference 1).

At the distal end of the endoscope insertion portion of this endoscope apparatus, a cylindrical insertion portion side electrode portion connected to the power supply portion is provided. Further, the adapter for the endoscope is also provided with an adapter side electrode part connected to the illumination part or the like. The adapter side electrode part is provided with the spherical electrode terminal, and this electrode terminal is installed in the attachment hole via the compression spring. The electrode terminal is installed in the mounting hole so as to be movable in the length direction of the mounting hole, and is projected and retracted from the opening of the mounting hole. With this configuration, when the endoscope adapter is attached to the distal end of the endoscope insertion section, the adapter side electrode section and the insertion section side electrode section are electrically connected, and the illumination section is connected to the power supply section. Power is supplied.
JP 2004-341546 A

  However, in the endoscope apparatus as described above, when the endoscope adapter is removed from the endoscope insertion portion, the electrode terminal is arranged at the tip of the attachment hole by the biasing force of the compression spring, so that the attachment hole When the endoscope adapter is attached to the endoscope insertion portion, the electrode terminal is located behind the attachment hole by the insertion portion side electrode portion (inward of the endoscope adapter). As a result, the gap is created in the opening. Therefore, there is a problem that dust enters and adheres to the attachment hole through the gap. Therefore, by increasing the diameter of the electrode terminal, it is possible to reduce the gap of the opening when it is pushed in. However, if the diameter of the electrode terminal is increased, the endoscope insertion portion or the endoscope The adapter also gets bigger.

  The present invention has been made in view of such circumstances, and the endoscope adapter is attached to the endoscope insertion portion without enlarging the endoscope adapter and the endoscope insertion portion. However, it is an object of the present invention to provide an endoscope apparatus and an adapter for the endoscope that can close the opening and maintain the soundness of the electrode terminal for a long period of time.

In order to solve the above problems, the present invention provides the following means.
The invention according to claim 1 includes an illuminating unit that irradiates a subject with illumination light, and an adapter-side electrode unit that is electrically connected to the illuminating unit, and is an endoscope insertion unit that is inserted into the subject. In the endoscope adapter detachably attached to the adapter, the adapter-side electrode portion is a long and electrically conductive hollow case in which one end opening is formed at one end in the length direction, and the inside of the hollow case. A columnar electrode terminal that is provided so as to be movable in the length direction and can protrude and retract from one end in the length direction of the hollow case through the one end opening, and an inner diameter dimension of the one end opening, The outer diameter of the electrode terminal is set to be the same.

In the endoscope adapter according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the electrode terminal is pressed and pushed inward of the endoscope adapter. At this time, since the electrode terminal is formed in a columnar shape, as long as the electrode terminal is arranged in the one end opening, the distance between the inner wall of the one end opening and the outer wall of the electrode terminal is equal to the length of the electrode terminal. It is constant regardless of the position in the vertical direction. In the present invention, since the inner diameter dimension of the one end opening and the outer diameter dimension of the electrode terminal are set to be the same, the inner wall of the one end opening and the electrode regardless of the position in the length direction of the electrode terminal. A gap between the outer wall of the terminal is closed.
Thereby, even when attached to the endoscope insertion portion, it is possible to prevent a gap from being generated between the inner wall of the one end opening and the outer wall of the electrode terminal. Therefore, it is possible to prevent dust from entering and attaching to the adapter side electrode portion.

The invention according to claim 2 includes an endoscope insertion portion that is inserted into a subject, and includes an adapter-side electrode portion that is electrically connected to an illumination portion that irradiates the subject with illumination light. In an endoscope apparatus in which an adapter is detachably attached to the endoscope insertion portion to observe the subject, the endoscope insertion portion is connected to the endoscope insertion portion. when mounted, provided with a insertion portion side electrode portion electrically connected to the adapter side electrode portion, the insertion portion side electrode portion, the one end opening is formed at one end in the longitudinal direction, the length A hollow case having a conductive shape, and a columnar electrode provided in the hollow case so as to be movable in the length direction, and capable of protruding and retracting from one end in the length direction of the hollow case through the one end opening. A terminal, and an inner diameter dimension of the opening at the one end Characterized in that the outer diameter of the electrode terminal is set to the same.

In the endoscope apparatus according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the adapter side electrode portion and the insertion portion side electrode portion are electrically connected. At this time, the electrode terminal is pressed by the adapter side electrode portion and is pushed inward of the endoscope insertion portion. Here, since the electrode terminal is formed in a columnar shape, as long as the electrode terminal is arranged in the one end opening, the distance between the inner wall of the one end opening and the outer wall of the electrode terminal is equal to the length of the electrode terminal. It is constant regardless of the position in the vertical direction. In the present invention, since the inner diameter dimension of the one end opening and the outer diameter dimension of the electrode terminal are set to be the same, the inner wall of the one end opening and the electrode regardless of the position in the length direction of the electrode terminal. A gap between the outer wall of the terminal is closed.
Accordingly, even when the endoscope adapter is attached to the endoscope insertion portion, it is possible to prevent a gap from being generated between the inner wall of the one end opening and the outer wall of the electrode terminal. Therefore, it is possible to prevent dust from entering and sticking into the insertion portion side electrode portion.

The invention according to claim 3 includes an endoscope insertion portion to be inserted into a subject and an endoscope adapter having an illumination portion that irradiates the subject with illumination light. In an endoscope apparatus that is detachably attached to the endoscope insertion portion and observes the subject, the adapter for the endoscope is provided with an adapter-side electrode portion that is electrically connected to the illumination portion. The endoscope insertion portion is provided with an insertion portion side electrode portion that is electrically connected to the adapter side electrode portion when the endoscope adapter is attached to the endoscope insertion portion. And either one of the adapter side electrode part or the insertion part side electrode part includes a long and electrically conductive hollow case in which one end opening is formed at one end in the length direction. One or the other is at least for the endoscope A columnar electrode terminal disposed in the hollow case through the one end opening portion when the adapter is attached to the endoscope insertion portion, the inner diameter dimension of the one end opening portion; The outer diameter dimension is set to be the same.

In the endoscope apparatus according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the adapter side electrode portion and the insertion portion side electrode portion are electrically connected. At this time, an electrode terminal is arrange | positioned in a hollow case through one end opening part. Here, since the electrode terminal is formed in a columnar shape, as long as the electrode terminal is arranged in the one end opening, the distance between the inner wall of the one end opening and the outer wall of the electrode terminal is equal to the length of the electrode terminal. It is constant regardless of the position in the vertical direction. In the present invention, since the inner diameter dimension of the one end opening and the outer diameter dimension of the electrode terminal are set to be the same, the inner wall of the one end opening and the electrode regardless of the position in the length direction of the electrode terminal. A gap between the outer wall of the terminal is closed.
Accordingly, even when the endoscope adapter is attached to the endoscope insertion portion, it is possible to prevent a gap from being generated between the inner wall of the one end opening and the outer wall of the electrode terminal. Therefore, it is possible to prevent dust from entering and sticking into the adapter side electrode part or the insertion part side electrode part.

  Note that “at least” means that when the endoscope adapter is removed from the endoscope insertion portion, it does not matter whether the electrode terminal is disposed in the hollow case through the one end opening. When the endoscope adapter is attached, it means that the electrode terminal is disposed in the hollow case through the one end opening. For example, when either the adapter side electrode part or the insertion part side electrode part is provided with a hollow case and the other is provided with an electrode terminal, the electrode terminal is placed in the hollow case when the endoscope adapter is removed. Although not arranged, when the endoscope adapter is attached, the electrode terminal is arranged in the hollow case through the one end opening. In addition, when either the adapter side electrode part or the insertion part side electrode part is provided with both the hollow case and the electrode terminal, the electrode terminal passes through the one end opening even when the endoscope adapter is removed. Even when the endoscope adapter is attached in the hollow case, the electrode terminal is placed in the hollow case through the one end opening.

  According to a fourth aspect of the present invention, in the endoscope apparatus according to the third aspect, the one end opening is circular and the electrode terminal is cylindrical.

  In the endoscope apparatus according to the present invention, since the one end opening is circular and the electrode terminal is cylindrical, not only can the movement within the one end opening of the electrode terminal be smooth, but also the one end opening. The gap between the inner wall of the part and the outer wall of the electrode terminal can be uniformly and uniformly closed.

  The invention according to claim 5 is the endoscopic device according to claim 3 or 4, wherein the biasing means biases the electrode terminal outward in the hollow case through the one end opening. Is provided.

In the endoscope apparatus according to the present invention, when the electrode terminal is arranged in the hollow case through the one end opening, the electrode terminal is urged outward by the urging means.
Thereby, when the adapter for endoscopes is attached to the endoscope insertion portion, the adapter side electrode portion and the insertion portion side electrode portion can be reliably connected.

  The invention according to claim 6 is the endoscope apparatus according to claim 5, wherein the urging means has conductivity.

  In the endoscope apparatus according to the present invention, since the urging means has conductivity, it is possible to efficiently supply power to the illumination unit provided in the endoscope adapter.

  The invention according to claim 7 is the endoscope apparatus according to any one of claims 3 to 6, wherein the endoscope adapter and the endoscope insertion portion include the endoscope adapter. Adapter-side mounting surface and insertion-unit-side mounting surface are provided for mounting the endoscope to the endoscope insertion portion, and the electrode terminal protrudes from either the adapter-side mounting surface or the insertion-unit-side mounting surface. The adapter side electrode part or the insertion part side electrode part is immersed inwardly with respect to either the adapter side attachment surface or the insertion part side attachment surface.

  In the endoscope apparatus according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the protruding electrode terminal and the immersed adapter side electrode portion or insertion portion side electrode portion are electrically connected. Is done. Here, since the adapter side electrode part or the insertion part side electrode part is immersed inward, it is possible to prevent dust from entering and attaching to the adapter side electrode part or the insertion part side electrode part. The soundness of each electrode part can be effectively maintained.

  The invention according to claim 8 is the endoscope apparatus according to any one of claims 3 to 7, wherein any one of the adapter side electrode portion and the insertion portion side electrode portion is the hollow case. And the electrode terminal, the electrode terminal is provided in the hollow case so as to be movable in the length direction, and protrudes and protrudes from one end in the length direction of the hollow case through the one end opening. It is possible to be provided.

In the endoscope apparatus according to the present invention, when the endoscope adapter is removed from the endoscope insertion portion, the electrode terminal protrudes from one end in the length direction of the hollow case, and the endoscope adapter is attached. The electrode terminal moves toward the inside of the hollow case by being pressed by the side electrode part or the insertion part side electrode part.
Thereby, when the adapter for endoscopes is attached to the endoscope insertion portion, the adapter side electrode portion and the insertion portion side electrode portion can be reliably connected.

  The invention according to claim 9 is the endoscope apparatus according to claim 8, wherein the one end opening is formed by an inward flange portion directed radially inward of the hollow case, and the electrode The terminal comprises: a columnar terminal distal end; and a terminal proximal end connected to the proximal end side of the terminal distal end and set to have a larger diameter than the terminal distal end. It is provided in the hollow case so as to be movable in the length direction, and the terminal tip portion is provided so as to be able to protrude and retract through the one end opening.

In the endoscope apparatus according to the present invention, by attaching and detaching the endoscope adapter, the terminal proximal end portion moves in the hollow case, and the terminal distal end portion protrudes and appears from one end in the length direction of the hollow case. Furthermore, when the terminal base end portion tries to move outward through the one-end opening, the terminal base end portion and the inward flange portion come into contact with each other, and movement in the same direction is restricted.
Thereby, not only can an adapter side electrode part and an insertion part side electrode part be connected reliably, but it can prevent that an electrode terminal comes out of a hollow case.

  The invention according to claim 10 is the endoscope apparatus according to claim 8 or claim 9, wherein a distal end large diameter portion set to a diameter larger than the diameter of the electrode terminal is provided on the distal end side of the electrode terminal. It is provided.

In the endoscope apparatus according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the distal end large diameter portion comes into contact with the adapter side electrode portion or the insertion portion side electrode portion.
As a result, the contact area to the adapter side electrode part or the insertion part side electrode part can be increased, and the adapter side electrode part and the insertion part side electrode part can be made good and easy even if the component accuracy and assembly precision are reduced. Can be conducted.

  The invention according to claim 11 is the endoscope apparatus according to any one of claims 3 to 10, wherein the adapter side electrode portion or the insertion portion side electrode portion is arranged in a length direction of the hollow case. The other end opening formed on the other end side and the other end side terminal arranged on the other end side are provided to be movable in the length direction in the hollow case. And is provided so as to be able to protrude from the other end in the length direction of the hollow case through the other end opening.

In the endoscope apparatus according to the present invention, when the hollow case is attached to the endoscope adapter or the endoscope insertion portion with the other end side terminal on the back side, the other end side terminal is connected to the endoscope adapter or the inner end. The terminal for connection provided in the back of the endoscope insertion portion is contacted, and the other end side terminal and the terminal for connection are electrically connected.
Thereby, not only the adapter side electrode part or the insertion part side electrode part can be easily incorporated, but also the dimensional error of each component can be absorbed. Further, the adapter side electrode part or the insertion part side electrode part can be easily replaced.

  The invention according to claim 12 is the endoscope apparatus according to any one of claims 3 to 11, wherein the hollow case is provided inward of the endoscope adapter or the endoscope insertion portion. A hollow case movement restricting means for restricting movement is provided.

In the endoscope apparatus according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the hollow case is pressed toward the inside of the endoscope adapter or the endoscope insertion portion. At this time, the movement of the hollow case is restricted by the hollow case movement restricting means.
Thereby, a hollow case can be fixed easily and the favorable contact state of an adapter side electrode part and an insertion part side electrode part can be maintained over a long period of time.

The invention according to claim 13 is the endoscope apparatus according to any one of claims 3 to 12 , wherein the hollow case is attached to the endoscope adapter or the endoscope insertion portion. And an insulating means for insulating the hollow case from the mounting portion.

In the endoscope apparatus according to the present invention, the hollow case and the mounting portion are insulated by the insulating means.
Thereby, the electrical loss in an adapter side electrode part or an insertion part side electrode part can be reduced.

The invention according to claim 14 is the endoscope apparatus according to claim 13 , wherein the insulating means is an insulating member that covers the hollow case, and the endoscope adapter or the endoscope insertion portion is provided. Insulating member movement restricting means for restricting movement of the insulating member inward is provided.

In the endoscope apparatus according to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, the insulating member is pressed toward the inside of the endoscope adapter or the endoscope insertion portion. At this time, the insulating member movement restricting means restricts the insulating member from moving inward.
Thereby, an insulating member can be fixed easily and the insulation state of a hollow case and an attachment part and the contact state of an adapter side electrode part and an insertion part side electrode part can be maintained over a long period of time.

  According to the present invention, when the endoscope adapter is attached to the endoscope insertion portion, it is possible to prevent a gap from being generated between the inner wall of the one end opening and the outer wall of the electrode terminal. Even when the endoscope adapter is attached without enlarging the endoscope adapter or the endoscope insertion portion, the one-end opening can be closed, and the soundness of the electrode terminal can be maintained over a long period of time. it can.

(Embodiment 1)
Hereinafter, an endoscope apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an endoscope apparatus 1 as a first embodiment of the present invention.
The endoscope apparatus 1 includes a long insertion portion (endoscope insertion portion) 2 having a bendable bending portion 7 and a main body portion 3 to which the insertion portion 2 is connected to perform various operations. ing.

The main body portion 3 is formed in a substantially box shape, and an operation panel 6 for performing a bending operation of the insertion portion 2 is provided on a side wall portion thereof. A monitor 8 for projecting an observation image is provided on the top surface of the main body 3. Further, the main body 3 is provided with a power supply unit 9 for supplying power.
Moreover, the insertion part 2 is comprised so that the base end part may be connected with the main-body part 3 so that attachment or detachment is possible via the connection part not shown. On the other hand, as shown in FIG. 2, a CCD 16 as an observation means is provided at the tip. A fitting projection 17 is formed on the outer peripheral surface of the distal end portion of the insertion portion 2 so as to extend over the entire circumference and project radially outward. An insertion portion side attachment surface 13 for detachably attaching an optical adapter 12 (shown in FIG. 1) having an objective lens (not shown) is provided on the distal end surface of the insertion portion 2. The insertion portion side mounting surface 13 is provided with a fixed insertion portion side electrode portion 32 that is electrically connected to the power source portion 9 shown in FIG. 1 via a cable (not shown). The insertion portion side electrode portion 32 will be described later.

As shown in FIG. 3, the optical adapter (endoscope adapter) 12 includes an adapter main body 27 formed in a substantially columnar shape, and a substantially cylindrical concentrically connected to the proximal end side of the adapter main body 27. And a mounting hood portion 23 having a shape.
On the side wall of the adapter main body 27, an illumination unit 11 made of, for example, an LED is provided. In addition, an adapter-side attachment surface 29 for attaching the optical adapter 12 to the insertion portion 2 is provided on the bottom surface portion 27 a of the adapter main body portion 27. The adapter-side attachment surface 29 is provided with a movable adapter-side electrode unit 18 that is electrically connected to the illumination unit 11. The adapter side electrode unit 18 will be described later.
An attachment groove 26 extending over the entire circumference is formed on the inner peripheral surface of the attachment hood portion 23.
Under such a configuration, when the optical adapter 12 is arranged and pushed in front of the insertion portion side mounting surface 13 shown in FIG. 2, the fitting protrusion 17 and the mounting groove 26 are fitted, The optical adapter 12 is detachably attached to the distal end portion of the insertion portion 2 in a state where the insertion portion side attachment surface 13 and the adapter side attachment surface 29 face each other.

Further, as shown in FIGS. 4 and 5, the adapter side electrode portion 18 in the present embodiment includes a hollow case 30 formed in a bottomed cylindrical shape and an electrode terminal 31 formed in a substantially columnar shape. Yes.
The hollow case 30 is made of non-ferrous metal such as aluminum or brass, or metal such as iron, and has conductivity. Further, an inward flange portion 34 that is directed radially inward is formed at one end in the length direction L of the hollow case 30. The inward flange portion 34 is formed by caulking one end of the hollow case 30. The inward flange portion 34 forms a circular one-end opening 35 at one end of the hollow case 30.

  The electrode terminal 31 is made of metal, and the surface thereof is plated or painted with high conductivity. Further, the electrode terminal 31 includes a cylindrical terminal distal end portion 37 and a terminal proximal end portion 38. The terminal distal end portion 37 and the terminal proximal end portion 38 are concentrically and integrally connected. The terminal tip portion 37 protrudes from one end of the hollow case 30 through the one end opening 35. The inner diameter of the one end opening 35 and the outer diameter of the terminal tip 37 are set to be the same, and the one end opening 35 is closed by the terminal tip 37 being disposed in the one end opening 35. It has become.

The terminal base end portion 38 is set to have a larger diameter than the terminal distal end portion 37, and is provided so as to be movable in the length direction L in the cylindrical hole 39 (in the hollow case) of the hollow case 30. Then, the terminal proximal end portion 38 moves in the cylindrical hole 39 so that the terminal distal end portion 37 can be projected and retracted from one end of the hollow case 30 through the one end opening 35. In addition, when the terminal base end portion 38 tries to move outward through the one end opening 35, the terminal base end portion 38 and the inward flange portion 34 come into contact with each other. That is, the inward flange portion 34 functions as a means for preventing the electrode terminal 31 from coming off.
A coil spring (biasing means) 42 is provided between the terminal base end portion 38 and the inner bottom surface portion of the hollow case 30. Due to the biasing force of the coil spring 42, the terminal base end portion 38 is biased toward one end of the hollow case 30, and the terminal distal end portion 37 is biased outward from one end of the hollow case 30. ing. The coil spring 42 is made of metal and has conductivity.

  As shown in FIGS. 6 and 7, the adapter-side electrode portion 18 having such a configuration is provided with an insulating case (insulating means) 47 that covers the periphery of the hollow case 30. That is, the insulating case 47 is formed in a bottomed cylindrical shape, and the adapter side electrode portion 18 is inserted and fixed in the cylindrical hole. The bottom surface portion of the hollow case 30 and the bottom surface portion 47a of the insulating case 47 are in contact with each other. An outward flange portion 48 that protrudes radially outward is formed at the tip of the insulating case 47. A through hole 49 is formed in the center of the bottom surface portion 47 a of the insulating case 47.

The insulating case 47 in which the adapter-side electrode portion 18 is thus inserted is attached to the electrode attachment hole 43 formed in the optical adapter 12. That is, the inner peripheral wall portion 44 that forms the electrode attachment hole 43 functions as an attachment portion for attaching the hollow case 30 and the insulating case 47. In a state where the adapter side electrode portion 18 is attached to the electrode attachment hole 43, the terminal tip portion 37 protrudes outward from the adapter side attachment surface 29.
A stepped portion 52 is formed at one end of the inner peripheral wall portion 44 in the length direction on the bottom surface portion 27 a side, and the outward flange portion 48 is in contact with the stepped portion 52.

Under such a configuration, when the adapter side electrode portion 18 is pressed toward the inner side (back side) of the optical adapter 12, the pressing force is supported by the bottom surface portion 47a of the insulating case 47, so that the hollow portion is hollow. The inward movement of the case 30 is restricted. Further, when the insulating case 47 is pressed toward the inner side (back side) of the optical adapter 12, the pressing force is supported by the stepped portion 52, and the inward movement of the insulating case 47 is restricted. It has become so. That is, the bottom surface portion 47a of the insulating case 47 functions as a hollow case movement restricting means, and the step portion 52 and the outward flange portion 48 function as insulating member movement restricting means.
The insulating case 47 functions as an insulating means and an insulating member for insulating the hollow case 30 and the inner peripheral wall portion 44.

  In addition, one end of a cable 53 inserted through the cylindrical hole of the insulating case 47 through the through hole 49 is electrically connected to the outer bottom surface portion of the hollow case 30 by solder. The other end of the cable 53 is electrically connected to the illumination unit 11. Reference numeral 50 denotes a solder portion.

  Further, as shown in FIG. 2, a concave portion 54 is formed in the insertion portion side mounting surface 13 of the insertion portion 2, and a bottomed cylindrical insertion portion side electrode portion 32 is provided in the concave portion 54. Yes. The outer bottom surface portion of the insertion portion side electrode portion 32 is exposed outward from the concave portion 54. That is, the insertion portion side electrode portion 32 is immersed in the inner side (back side) of the insertion portion 2 with respect to the insertion portion side mounting surface 13. Therefore, the periphery of the insertion portion side electrode portion 32 is covered with the side wall portion that forms the concave portion 54, and thereby the insertion portion side electrode portion 32 is hidden from the surface of the insertion portion side mounting surface 13. Further, the insertion portion side electrode portion 32 is made of metal, and the surface thereof is plated or coated with high conductivity.

Next, the operation of the endoscope apparatus 1 in the present embodiment configured as described above will be described.
First, the optical adapter 12 is attached to the insertion portion side attachment surface 13 of the insertion portion 2. Then, as will be described later, the terminal tip portion 37 is disposed in the recess 54 and abuts on the outer bottom surface portion of the insertion portion side electrode portion 32. Thereby, the adapter side electrode part 18 and the insertion part side electrode part 32 are electrically connected, and the power from the power supply part 9 is supplied to the illumination part 11. Then, the insertion unit 2 is inserted into the subject, and illumination light is irradiated from the illumination unit 11. At this time, the reflected light from the object to be examined is taken in via the objective lens of the optical adapter 12 and imaged on the CCD 16. Then, an output signal from the CCD 16 is supplied to the monitor 8 through a predetermined circuit. As a result, an observation image is displayed on the monitor 8, and a predetermined examination of the subject is performed while viewing the observation image.

Here, when the optical adapter 12 is attached to the insertion portion side attachment surface 13, the adapter side electrode portion 18 and the insertion portion side electrode portion 32 are electrically connected as follows.
That is, the optical adapter 12 is brought to the distal end of the insertion portion 2 and the optical adapter 12 is pushed in with the insertion portion side attachment surface 13 and the adapter side attachment surface 29 facing each other. Then, the terminal tip portion 37 is disposed in the recess 54 and comes into contact with the insertion portion side electrode portion 32. When the optical adapter 12 is further pushed in, the terminal tip portion 37 is pressed inward of the optical adapter 12 by the insertion portion side electrode portion 32. Therefore, the terminal distal end portion 37 moves in the direction of immersing into the hollow case 30 through the one end opening 35, and the terminal proximal end portion 38 resists the urging force of the coil spring 42, Is moved toward the inside of the optical adapter 12.

  Even if the terminal tip 37 moves toward the hollow case 30, the terminal tip 37 has a cylindrical shape, and therefore, as long as the terminal tip 37 passes through the one end opening 35, The distance between the inner wall of the one end opening 35 is always constant. Furthermore, since the outer diameter of the terminal tip 37 and the inner diameter of the one end opening 35 are set to be the same, the outer wall of the terminal tip 37 and the one end opening are set regardless of the position of the terminal tip 37. The gap between the inner wall of the portion 35 is always closed.

  Next, in a state where the terminal tip portion 37 is pushed in, the fitting protrusion 17 of the insertion portion 2 is fitted into the attachment groove 26, and the optical adapter 12 is attached to the tip of the insertion portion 2. At this time, the terminal tip portion 37 protrudes from the adapter side mounting surface 29 through the one end opening 35, but the protruding dimension from the adapter side mounting surface 29 is the amount pushed by the insertion side electrode portion 32. Get smaller. Further, the terminal tip portion 37 is pressed toward the insertion portion side electrode portion 32 by the urging force of the coil spring 42. Therefore, the state in which the terminal tip portion 37 is in contact with the insertion portion side electrode portion 32 is maintained. Thereby, the adapter side electrode part 18 and the insertion part side electrode part 32 are electrically connected.

  Further, when the optical adapter 12 is attached to the distal end of the insertion portion 2, the hollow case 30 and the insulating case 47 are pressed and try to move inward of the optical adapter 12. The movement is regulated by contacting the bottom surface portion 47 a and the stepped portion 52 of 47.

  As described above, according to the endoscope apparatus 1 in the present embodiment, the gap between the outer wall of the terminal tip portion 37 and the inner wall of the one end opening portion 35 can always be closed regardless of the position of the terminal tip portion 37. Therefore, even when the optical adapter 12 is attached to the insertion portion 2, it is possible to prevent a gap from being generated between the inner wall of the one end opening 35 and the outer wall of the terminal tip portion 37. As a result, it is possible to prevent dust from entering and sticking into the adapter-side electrode portion 18. Therefore, contact failure etc. can be prevented and the soundness of the adapter side electrode part 18 can be maintained over a long period of time. In addition, since dust can be prevented from entering, the frequency of cleaning can be reduced and management can be facilitated.

In addition, since the one end opening 35 has a circular shape and the terminal tip portion 37 has a cylindrical shape, not only can the movement of the terminal tip portion 37 within the one end opening 35 be smooth, but also the one end opening 35. The gap between the inner wall and the outer wall of the terminal tip 37 can be uniformly and uniformly closed.
Further, when the terminal tip 37 is disposed in the hollow case 30 through the one end opening 35, the terminal tip 37 is biased outward by the biasing force of the coil spring 42, so that the optical adapter is used. When 12 is attached to the insertion part 2, the adapter side electrode part 18 and the insertion part side electrode part 32 can be reliably connected.

Furthermore, since the coil spring 42 and the hollow case 30 have conductivity, the power from the power supply unit 9 can be supplied to the illumination unit 11 via the coil spring 42 and the hollow case 30. Therefore, the efficiency of power supply can be improved. Here, since the coil spring 42 has a small cross-sectional area and a large length dimension, the resistance increases, whereas the hollow case 30 has a large cross-sectional area and a small length dimension, and thus the resistance decreases. In the present embodiment, since the hollow case 30 and the cable 53 are connected, power can be supplied more efficiently.
Further, since the hollow case 30 and the inner peripheral wall portion 44 can be insulated by the insulating case 47, the electrical loss in the adapter side electrode portion 18 can be reduced.
Moreover, since the insertion part side electrode part 32 is immersing inward with respect to the insertion part side attachment surface 13, and is hidden from the surface of the insertion part side attachment surface 13, the state which removed the optical adapter 12 Therefore, it is possible to prevent damage to the insertion portion side electrode portion 32 and intrusion / attachment of dust, and the soundness of the insertion portion side electrode portion 32 can be effectively maintained.

Further, since the inward flange portion 34 is provided in the hollow case 30, it is possible to prevent the electrode terminal 31 from falling out of the hollow case 30 while enabling the electrode terminal 31 to move smoothly.
Furthermore, since the bottom case portion 47a and the stepped portion 52 of the insulating case 47 can restrict the movement of the hollow case 30 and the insulating case 47 toward the inside of the optical adapter 12, the hollow case 30 and the insulating case 47 can be regulated. Can be easily fixed to the inner peripheral wall portion 44, and a good contact state between the adapter side electrode portion 18 and the insertion portion side electrode portion 32 can be maintained over a long period of time.

Further, when the optical adapter 12 is attached to the insertion portion 2, the outer bottom surface of the insertion portion side electrode portion 32 and the distal end surface of the terminal tip portion 37 come into contact with each other, and therefore the insertion portion side electrode portion 32 and the adapter side electrode portion 18. Can be brought into surface contact with each other, and the insertion-side electrode portion 32 and the adapter-side electrode portion 18 can be easily conducted even if the component accuracy and assembly accuracy are reduced.
Furthermore, since the insertion part side electrode part 32 and the electrode terminal 31 are plated or coated with high conductivity, the electrical loss between the insertion part side electrode part 32 and the adapter side electrode part 18 is reduced. Can do.

In the present embodiment, the hollow case 30, the electrode terminal 31, the coil spring 42, and the insulating case 47 are provided. However, the shape and material thereof can be changed as appropriate.
For example, as shown in FIG. 8, an elastic member (biasing means) 57 such as a resin may be provided instead of the coil spring 42. In addition, about this elastic member 57, the efficiency of electric power supply can be improved by using conductive resin.
Further, as shown in FIG. 9, the coil spring 42 and the like need not be provided. In this case, the inside of the hollow case 30 is airtight. Thereby, according to the reciprocation of the electrode terminal 31, air can be functioned as an urging | biasing means by compressing and expanding the air in the cylinder hole 39. FIG.

Furthermore, as shown in FIG. 10, a rubber sealing member 58 may be provided at the tip of the hollow case 30. As a result, it is possible to prevent water from entering the adapter-side electrode portion 18 and to prevent corrosion or failure due to water immersion.
Moreover, as shown in FIG. 11, it is good also considering the electrode terminal 31 as the column shape which has the same diameter over the full length. Thereby, the electrode terminal 31 can be manufactured easily. In this case, the front end of the coil spring 42 and the rear end of the electrode terminal 31 are fixed, and the rear end of the coil spring 42 and the inner bottom surface of the hollow case 30 are fixed. Thereby, the inward flange part 34 can be made unnecessary and the configuration can be simplified.

In addition, as shown in FIG. 12, a tip large diameter portion 59 having a diameter larger than that of the terminal tip portion 37 may be provided at the tip of the terminal tip portion 37. Thereby, the tip large diameter part 59 can be brought into contact with the insertion part side electrode part 32, and the contact area to the insertion part side electrode part 32 can be increased. Therefore, even if the component accuracy and the assembly accuracy are lowered, the adapter-side electrode portion 18 and the insertion portion-side electrode portion 32 can be made good and easy to conduct.
Further, as shown in FIGS. 13 and 14, an outward flange portion 62 is provided at the distal end of the hollow case 30, and a stepped portion 63 with which the outward flange portion 62 abuts is provided at the distal end of the insulating case 47. Good. The outward flange portion 62 and the stepped portion 63 function as hollow case movement restricting means. Further, an engaging stepped portion 64 is provided in the vicinity of the proximal end portion of the insulating case 47, and an engaged stepped portion 66 that engages with the engaging stepped portion 64 is provided on the proximal end side of the inner peripheral wall portion 44. These engaging stepped portion 64 and engaged stepped portion 66 function as insulating member movement restricting means.

Further, as shown in FIG. 15, the insulating case 47 is formed in a cylindrical shape without providing a stepped portion or an outward flange portion on the inner peripheral wall portion 44, the insulating case 47, and the hollow case 30, and the hollow case 30 is bottomed. It may be cylindrical. In this case, the insulating case 47 and the hollow case 30 are fixed with an adhesive or the like.
Further, as shown in FIG. 16, the adapter side electrode portion 18 may be directly attached to the inner peripheral wall portion 44 without providing the insulating case 47. In this case, the hollow case 30 may be made of an insulating member, or the surface of the hollow case 30 may be subjected to an insulation treatment such as an alumite treatment. Further, the inner peripheral wall portion 44 may be made of an insulating member, or the surface of the inner peripheral wall portion 44 may be insulated.

Further, as shown in FIGS. 17 and 18, an inward flange portion 34 is provided at the other end in the length direction L of the hollow case 30, and the other end opening 68 having a circular shape is formed by the inward flange portion 34. You may make it form. In this case, a cylindrical other end side terminal 69 is provided at the other end of the hollow case 30. The other end side terminal 69 includes a cylindrical connection terminal portion 70 and a terminal substrate portion 71, and has the same configuration as the electrode terminal 31.
The connection terminal portion 70 protrudes from the other end of the hollow case 30 through the other end opening 68. The inner diameter of the other end opening 68 and the outer diameter of the connection terminal portion 70 are set to be the same. By arranging the connection terminal portion 70 in the other end opening 68, the other end opening 68 is blocked. It is supposed to be. Thereby, it is possible to prevent dust from entering through the other end opening 68.

Further, the terminal board portion 71 is provided so as to be movable in the length direction L in the cylindrical hole 39 of the hollow case 30. As in the case of the electrode terminal 31, the terminal board portion 71 moves in the cylindrical hole 39, so that the connection terminal portion 70 can protrude from the other end of the hollow case 30 through the other end opening 68. ing.
Further, the terminal board portion 71 is biased toward the other end side of the hollow case 30 by the biasing force of the coil spring 42, and the connection terminal portion 70 is biased outward from the other end of the hollow case 30. It has become.
Furthermore, the insulation case 47 is detachably attached to the electrode attachment hole 43, and the insulation case 47 can be removed even after the insulation case 47 is attached to the electrode attachment hole 43. Yes. In other words, the adapter-side electrode portion 18 is attached to the electrode attachment hole 43 through the insulating case 47 in an exchangeable manner.

Under such a configuration, when the adapter-side electrode portion 18 is inserted into the insulating case 47 and pushed to a predetermined position, the connection terminal portion 70 protrudes through the through hole 49. The through hole 49 can be closed by setting the outer diameter dimension of the connection terminal portion 70 and the inner diameter dimension of the through hole 49 to be the same.
Furthermore, when the insulating case 47 is inserted from the connection terminal portion 70 into the electrode mounting hole 43 and pushed to a predetermined position with the connection terminal portion 70 protruding as described above, the connection terminal portion 70 is connected to the cable 53. Is abutted against a connecting portion 73 provided at the tip of the coil spring and is pushed into the hollow case 30 against the urging force of the coil spring 42. At this time, the connection terminal portion 70 is pressed toward the connection portion 73 by the urging force of the coil spring 42, whereby the electrical connection between the other end side terminal 69 and the connection portion 73 is maintained.
Here, when the adapter side electrode part 18 fails, the adapter side electrode part 18 is extracted together with the insulating case 47, and the other adapter side electrode part 18 and the insulating case 47 are attached to the inner peripheral wall part 44 as described above. .
Note that the adapter-side electrode unit 18 may be attached to the insulating case 47 in a replaceable manner.

  As described above, the adapter-side electrode portion 18 can be easily incorporated without being conscious of its direction. Further, when the other end side terminal 69 appears and disappears, it is possible to absorb a dimensional error of each component. Moreover, since the adapter side electrode part 18 is replaceable, the repair of the optical adapter 12 can be facilitated. Furthermore, since it is not necessary to fix the other end side terminal 69 and the connection part 73 by soldering etc., replacement | exchange of the adapter side electrode part 18 can be made easy.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
19 to 22 show a second embodiment of the present invention.
19 to 22, the same components as those shown in FIGS. 1 to 18 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the first embodiment have the same basic configuration, and only the differences will be described here.

The endoscope apparatus 1 according to the present embodiment is obtained by attaching the adapter side electrode portion 18 and the insertion portion side electrode portion 32 of the first embodiment to each other. That is, the insertion portion side electrode portion 74 of the present embodiment has the same configuration as the adapter side electrode portion 18 of the first embodiment, and the adapter side electrode portion 75 of the present embodiment has the same configuration as that of the first embodiment. It has the same configuration as the insertion portion side electrode portion 32 of the embodiment. Therefore, the adapter side electrode part 75 is fixed, and the insertion part side electrode part 74 is movable as described above.
When the optical adapter 12 is attached to the insertion portion 2, the adapter side electrode portion 75 and the insertion portion side electrode portion 74 are electrically connected in the same manner as described above. At this time, the one end opening 35 is closed.

As described above, according to the endoscope apparatus 1 in the present embodiment, the same effects as in the first embodiment can be obtained.
Note that the modification of the first embodiment shown in FIGS. 8 to 18 can also be applied to this embodiment.

(Embodiment 3)
Next, a third embodiment of the present invention will be described.
23 to 26 show a third embodiment of the present invention.
In this embodiment, as shown in FIGS. 23 and 24, the insertion portion side electrode portion 78 is a fixed type, and the adapter side electrode portion 79 is a movable type. That is, the insertion portion side electrode portion 78 includes a columnar protruding terminal (electrode terminal) 80 protruding from the insertion portion side mounting surface 13, and the protruding terminal 80 is fixed to the insertion portion side mounting surface 13. Yes. On the other hand, as shown in FIGS. 25 and 26, the adapter-side electrode portion 79 includes a columnar in-case connection terminal 83 instead of the electrode terminal 31.

The in-case connection terminal 83 is made of metal, and the surface thereof is plated or painted with high conductivity. The in-case connection terminal 83 is movable in the length direction L, and is biased toward the one end opening 35 by the coil spring 42.
Further, the inner diameter dimension of the one end opening 35 and the outer diameter dimension of the protruding terminal 80 are set to be the same.

  Under such a configuration, when the optical adapter 12 is attached to the insertion portion 2, the protruding terminal 80 is inserted into the hollow case 30 from the one end opening 35 via the recess 54. Then, the protruding terminal 80 comes into contact with the in-case connection terminal 83 and the adapter side electrode part 79 and the insertion part side electrode part 78 are electrically connected.

As described above, according to the endoscope apparatus 1 in the present embodiment, not only can the same effect as in the first embodiment described above be achieved, but also the strength is increased because the protruding terminal 80 is fixed. be able to.
Although the in-case connection terminal 83 is provided, the present invention is not limited to this, and the in-case connection terminal 83 may not be provided as shown in FIG. In this case, the protruding terminal 80 comes into contact with the tip of the coil spring 42 through the one end opening 35. Thereby, the adapter side electrode part 79 and the insertion part side electrode part 78 are electrically connected.
Needless to say, the modification of the first embodiment shown in FIGS. 8 to 19 can also be applied to this embodiment.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described.
28 to 30 show a fourth embodiment of the present invention.
This embodiment and the third embodiment have the same basic configuration, and only the differences will be described here.

The endoscope apparatus 1 according to the present embodiment is configured such that the adapter side electrode portion 79 and the insertion portion side electrode portion 78 of the third embodiment are replaced with each other and attached. That is, the insertion portion side electrode portion 85 of the present embodiment has the same configuration as the adapter side electrode portion 79 of the third embodiment, and the adapter side electrode portion 86 of the present embodiment has the same configuration as that of the third embodiment. It has the same configuration as the insertion portion side electrode portion 78 of the embodiment. Therefore, the adapter side electrode part 86 is fixed, and the insertion part side electrode part 85 is movable.
When the optical adapter 12 is attached to the insertion portion 2, the adapter side electrode portion 86 and the insertion portion side electrode portion 85 are electrically connected in the same manner as described above. At this time, the one end opening 35 is closed.

As described above, according to the endoscope apparatus 1 in the present embodiment, the same effects as those of the third embodiment can be obtained.
Needless to say, the modifications of the first embodiment shown in FIGS. 8 to 19 can also be applied to this embodiment.

In the first to fourth embodiments, the one end opening 35 and the other end opening 68 have a circular shape, and the electrode terminal 31, the other end side terminal 69, the protruding terminal 80, and the like have a cylindrical shape. The shape is not limited to this, and the shapes can be changed as appropriate. For example, the cross-sectional shape of the electrode terminal 31 or the like may be an ellipse, or the electrode terminal 31 or the like may be a prismatic shape.
In addition, the biasing means such as the coil spring 42 and the hollow case 30 are conductive. However, the present invention is not limited to this, and it is sufficient that at least one of the biasing means is conductive.

Moreover, although the adapter side electrode portions 18, 75, 79, 86 are connected to the illumination portion 11, the present invention is not limited to this, and sensors such as an adapter identification sensor, a temperature / humidity sensor, or other electronic devices. It may be connected to a component or the like.
Furthermore, although the illumination part 11 was provided in the side wall part of the optical adapter 12, and the optical adapter 12 was used as the adapter for side view, it is not restricted to this, The illumination part 11 is provided in the front-end | tip of the optical adapter 12, and the optical adapter 12 is provided. May be an adapter for direct viewing.
The technical scope of the present invention is not limited to the first to fourth embodiments, and various modifications can be made without departing from the spirit of the present invention.

1 is an overall configuration diagram showing a first embodiment of an endoscope apparatus according to the present invention. It is a perspective view which expands and shows the front-end | tip of the insertion part of the endoscope apparatus of FIG. It is a figure which expands and shows a mode that the optical adapter of FIG. 1 was seen from the base end side, Comprising: It is a perspective view which fractures | ruptures and shows the substantially half circumference of an attachment hood part. It is a perspective view which expands and shows the adapter side electrode part of FIG. It is a perspective view which fractures | ruptures and shows the substantially half circumference of the hollow case of FIG. It is a perspective view which fractures | ruptures and shows the substantially half circumference of the optical adapter of FIG. It is principal part sectional drawing which shows the mode of the periphery of the adapter side electrode part of FIG. It is a figure which shows the modification of the adapter side electrode part of FIG. 5, Comprising: It is a perspective view which shows a mode that the elastic member was provided. It is a figure which shows the modification of the adapter side electrode part of FIG. 5, Comprising: It is a perspective view which shows a mode that it has the air as an elastic means. It is a figure which shows the modification of the adapter side electrode part of FIG. 5, Comprising: It is a perspective view which shows a mode that the sealing member was provided. It is a figure which shows the modification of the adapter side electrode part of FIG. 5, Comprising: It is a perspective view which shows a mode that the cylindrical electrode terminal was provided. It is a figure which shows the modification of the adapter side electrode part of FIG. 5, Comprising: It is a perspective view which shows a mode that the front-end | tip large diameter part was provided in the terminal front-end | tip part. It is a figure which shows the modification of the hollow case of FIG. 6, an insulation case, and an inner peripheral wall part, Comprising: It is a perspective view which shows a mode that the outward flange part was provided in the hollow case. It is principal part sectional drawing which shows the mode of the periphery of the adapter side electrode part of FIG. It is a figure which shows the modification of the hollow case of FIG. 14, an insulation case, and an inner peripheral wall part, Comprising: It is principal part sectional drawing which shows the mode of the periphery of an adapter side electrode part. It is a figure which shows the other modification of the hollow case of FIG. 14, an insulation case, and an inner peripheral wall part, Comprising: It is principal part sectional drawing which shows the mode of the periphery of an adapter side electrode part. It is a figure which shows the modification of the hollow case of FIG. 6, an insulation case, and an inner peripheral wall part, Comprising: It is a perspective view which shows a mode that the other end side terminal was provided in the hollow case. It is principal part sectional drawing which shows the mode of the periphery of the adapter side electrode part of FIG. It is a figure which shows the principal part of 2nd Embodiment of the endoscope apparatus which concerns on this invention, Comprising: It is a perspective view which shows the front-end | tip of an insertion part. It is a figure which shows the principal part of 2nd Embodiment of the endoscope apparatus which concerns on this invention, Comprising: It is a perspective view which fractures | ruptures and shows the substantially half circumference of an attachment hood part seeing an optical adapter from the base end side. It is a perspective view which fractures | ruptures and shows substantially half circumference of the insertion part of FIG. It is principal part sectional drawing which shows the mode of the periphery of the insertion part side electrode part of FIG. It is a figure which shows the principal part of 3rd Embodiment of the endoscope apparatus which concerns on this invention, Comprising: It is a perspective view which shows the front-end | tip of an insertion part. It is a figure which shows the principal part of 3rd Embodiment of the endoscope apparatus which concerns on this invention, Comprising: It is a perspective view which fractures | ruptures and shows the substantially half circumference of an attachment hood part seeing an optical adapter from a base end side. It is explanatory drawing which expands and shows the adapter side electrode part of FIG. It is a perspective view which fractures | ruptures and shows substantially half circumference of the optical adapter of FIG. It is explanatory drawing which shows the modification of the adapter side electrode part of FIG. It is a figure which shows the principal part of 4th Embodiment of the endoscope apparatus which concerns on this invention, Comprising: It is a perspective view which shows the front-end | tip of an insertion part. It is a figure which shows the principal part of 4th Embodiment of the endoscope apparatus which concerns on this invention, Comprising: It is a perspective view which fractures | ruptures and shows the substantially half circumference of an attachment hood part seeing an optical adapter from a base end side. It is explanatory drawing which fractures | ruptures and shows the substantially half circumference of the insertion part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endoscope apparatus 2 Insertion part (endoscope insertion part)
11 Illumination part 12 Optical adapter (Adapter for endoscope)
13 insertion portion side mounting surface 18, 75, 79, 86 adapter side electrode portion 29 adapter side mounting surface 30 hollow case 31 electrode terminal 32, 74, 78, 85 insertion portion side electrode portion 34 inward flange portion 35 one end opening 37 Terminal distal end portion 38 Terminal proximal end portion 42 Coil spring (biasing means)
44 Inner wall (mounting part)
47 Insulation case (insulation means, insulation member)
47a Bottom surface (hollow case movement restricting means)
48 outward flange (insulation member movement restricting means)
52 Step part (insulating member movement restricting means)
57 Elastic member (biasing means)
59 Large-diameter tip 62 Outward flange (hollow case movement restricting means)
63 Step part (hollow case movement restricting means)
64 Engagement step (insulating member movement restricting means)
66 Engaged steps (insulating member movement restricting means)
68 Other end opening 69 Other end side terminal 80 Projection terminal (electrode terminal)
L Length direction

Claims (14)

An endoscope that includes an illumination unit that irradiates the subject with illumination light and an adapter-side electrode unit that is electrically connected to the illumination unit, and is detachably attached to an endoscope insertion unit that is inserted into the subject. In mirror adapter,
The adapter side electrode part is
A long , conductive hollow case with one end opening formed at one end in the length direction,
A columnar electrode terminal provided in the hollow case so as to be movable in the length direction, and capable of protruding and retracting from one end in the length direction of the hollow case through the one end opening,
An endoscope adapter, wherein an inner diameter dimension of the one end opening and an outer diameter dimension of the electrode terminal are set to be the same. An endoscope adapter comprising an endoscope-side electrode portion that includes an endoscope insertion portion that is inserted into a subject and that is electrically connected to an illumination portion that irradiates illumination light to the subject. In an endoscope apparatus that is detachably attached to the part and observes the subject,
The endoscope insertion portion is
When the endoscope adapter is attached to the endoscope insertion portion, the insertion portion side electrode portion is electrically connected to the adapter side electrode portion, and
This insertion part side electrode part is
A long , conductive hollow case with one end opening formed at one end in the length direction,
A columnar electrode terminal provided in the hollow case so as to be movable in the length direction, and capable of protruding and retracting from one end in the length direction of the hollow case through the one end opening,
An endoscope apparatus characterized in that an inner diameter dimension of the one end opening and an outer diameter dimension of the electrode terminal are set to be the same. An endoscope insertion portion to be inserted into a subject and an endoscope adapter having an illumination portion for irradiating the subject with illumination light, the endoscope adapter being attached to and detached from the endoscope insertion portion In an endoscope apparatus that can be attached and observes the subject,
The adapter for an endoscope is provided with an adapter-side electrode part electrically connected to the illumination part,
The endoscope insertion portion is provided with an insertion portion side electrode portion that is electrically connected to the adapter side electrode portion when the endoscope adapter is attached to the endoscope insertion portion. ,
Either the adapter side electrode part or the insertion part side electrode part is
While having a long and conductive hollow case with one end opening formed at one end in the length direction,
Either one or the other is
At least when the endoscope adapter is attached to the endoscope insertion portion, the columnar electrode terminal disposed in the hollow case through the one end opening,
An endoscope apparatus characterized in that an inner diameter dimension of the one end opening and an outer diameter dimension of the electrode terminal are set to be the same.   The endoscope apparatus according to claim 3, wherein the one end opening has a circular shape, and the electrode terminal has a cylindrical shape.   The endoscope apparatus according to claim 3 or 4, wherein a biasing means for biasing the electrode terminal outward is provided in the hollow case through the one end opening. .   The endoscope apparatus according to claim 5, wherein the urging unit has conductivity. The endoscope adapter and the endoscope insertion portion are provided with an adapter side attachment surface and an insertion portion side attachment surface for attaching the endoscope adapter to the endoscope insertion portion, respectively.
The electrode terminal protrudes from either the adapter side mounting surface or the insertion portion side mounting surface,
The said adapter side electrode part or the said insertion part side electrode part is immersing inward with respect to either the said adapter side attachment surface or the said insertion part side attachment surface, The Claim 3 characterized by the above-mentioned. The endoscope apparatus according to any one of Items 6. Either one of the adapter side electrode part or the insertion part side electrode part includes the hollow case and the electrode terminal,
The electrode terminal is provided so as to be movable in the length direction in the hollow case, and is provided so as to be able to protrude from one end in the length direction of the hollow case through the one end opening. The endoscope apparatus according to any one of claims 3 to 7. The one end opening is formed by an inward flange portion directed radially inward of the hollow case;
The electrode terminal includes a columnar terminal distal end, and a terminal proximal end connected to the proximal end side of the terminal distal end and set to have a larger diameter than the terminal distal end,
The terminal base end portion is provided so as to be movable in the length direction in the hollow case, and the terminal tip end portion is provided so as to be able to protrude and retract through the one end opening. The endoscope apparatus according to Item 8.   The endoscope apparatus according to claim 8 or 9, wherein a distal end large-diameter portion having a diameter larger than a diameter of the electrode terminal is provided on a distal end side of the electrode terminal. The adapter side electrode part or the insertion part side electrode part comprises the other end opening formed on the other end side in the length direction of the hollow case, and the other end side terminal arranged on the other end side,
The other end side terminal is provided in the hollow case so as to be movable in the length direction, and is provided so as to be able to protrude from the other end in the length direction of the hollow case through the other end opening. The endoscope apparatus according to any one of claims 3 to 10, wherein the endoscope apparatus is characterized in that   The hollow case movement restricting means for restricting the movement of the hollow case to the inside of the endoscope adapter or the endoscope insertion portion is provided. The endoscope apparatus according to item. An attachment part for attaching the hollow case is provided in the endoscope adapter or the endoscope insertion part,
The endoscope apparatus according to any one of claims 3 to 12, further comprising an insulating unit that insulates the hollow case and the attachment portion. The insulating means is an insulating member that covers the hollow case,
The endoscope apparatus according to claim 13 , further comprising an insulating member movement restricting unit that restricts movement of the insulating member inward of the endoscope adapter or the endoscope insertion portion.

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