Ultrasonic endoscope

1. An ultrasonic endoscope comprising:

a laminated body that comprises

an ultrasonic transducer array in which a plurality of ultrasonic transducers are arranged, and

a backing material layer that supports the plurality of ultrasonic transducers;

a cable portion that comprises

a plurality of cables each of which is electrically connected to a corresponding one of the plurality of ultrasonic transducers, and

a shield member that covers the plurality of cables from outside and that is made of a metal;

a first heat conductive member that is disposed on a side surface of the laminated body;

a first insulation tube that covers the shield member of the cable portion;

an electroconductive connection pipe that covers a part of the first insulation tube on a proximal end side of the ultrasonic endoscope;

a second insulation tube that is connected to one end of the connection pipe on the proximal end side and that covers a part of the connection pipe and a part of the first insulation tube on the proximal end side of the ultrasonic endoscope; and

a second heat conductive member that is disposed in contact with both of the first insulation tube and the connection pipe,

wherein the first heat conductive member is extended to the shield member that is grounded to a housing and is thermally connected to the shield member.

2. The ultrasonic endoscope according to claim 1 , wherein the second heat conductive member fills at least a part of a space between the first insulation tube and the connection pipe.

3. The ultrasonic endoscope according to claim 2 , wherein the second heat conductive member is a cylindrical member that is disposed between the first insulation tube and the connection pipe.

4. The ultrasonic endoscope according to claim 1 , wherein the second heat conductive member has a thick portion at an end portion thereof on a distal end side of the ultrasonic endoscope, the thick portion being thicker than a portion thereof that is disposed between the first insulation tube and the connection pipe, and the thick portion contacts an end surface of the connection pipe on the first heat conductive member side.

5. The ultrasonic endoscope according to claim 2 , wherein the second heat conductive member has a thick portion at an end portion thereof on a distal end side of the ultrasonic endoscope, the thick portion being thicker than a portion thereof that is disposed between the first insulation tube and the connection pipe, and the thick portion contacts an end surface of the connection pipe on the first heat conductive member side.

6. The ultrasonic endoscope according to claim 3 , wherein the second heat conductive member has a thick portion at an end portion thereof on a distal end side of the ultrasonic endoscope, the thick portion being thicker than a portion thereof that is disposed between the first insulation tube and the connection pipe, and the thick portion contacts an end surface of the connection pipe on the first heat conductive member side.

7. The ultrasonic endoscope according to claim 4 ,

wherein the second heat conductive member comprises a cylindrical portion and the thick portion, the cylindrical portion being disposed between the first insulation tube and the connection pipe, and

wherein the thick portion is an outward flange that has a cylindrical shape having an outside diameter larger than or equal to an inside diameter of the connection pipe.

8. The ultrasonic endoscope according to claim 5 ,

wherein the second heat conductive member comprises a cylindrical portion and the thick portion, the cylindrical portion being disposed between the first insulation tube and the connection pipe, and

wherein the thick portion is an outward flange that has a cylindrical shape having an outside diameter larger than or equal to an inside diameter of the connection pipe.

9. The ultrasonic endoscope according to claim 6 ,

wherein the second heat conductive member comprises a cylindrical portion and the thick portion, the cylindrical portion being disposed between the first insulation tube and the connection pipe, and

wherein the thick portion is an outward flange that has a cylindrical shape having an outside diameter larger than or equal to an inside diameter of the connection pipe.

10. The ultrasonic endoscope according to claim 1 ,

wherein the cable portion has a jacket of one layer outside of the shield member, and

wherein the jacket of the cable portion is removed at least at a portion that is covered by the second heat conductive member together with the first insulation tube.

11. The ultrasonic endoscope according to claim 2 ,

wherein the cable portion has a jacket of one layer outside of the shield member, and

wherein the jacket of the cable portion is removed at least at a portion that is covered by the second heat conductive member together with the first insulation tube.

12. The ultrasonic endoscope according to claim 3 ,

wherein the cable portion has a jacket of one layer outside of the shield member, and

wherein the jacket of the cable portion is removed at least at a portion that is covered by the second heat conductive member together with the first insulation tube.

13. The ultrasonic endoscope according to claim 4 ,

wherein the cable portion has a jacket of one layer outside of the shield member, and

wherein the jacket of the cable portion is removed at least at a portion that is covered by the second heat conductive member together with the first insulation tube.

14. The ultrasonic endoscope according to claim 7 ,

wherein the cable portion has a jacket of one layer outside of the shield member, and

wherein the jacket of the cable portion is removed at least at a portion that is covered by the second heat conductive member together with the first insulation tube.

15. The ultrasonic endoscope according to claim 10 ,

wherein the jacket of the cable portion is removed on the distal end side of the connection pipe and the shield member is exposed,

wherein, at a portion where the jacket is removed and the shield member is exposed to the first insulation tube, a part of the first insulation tube is removed, and the shield member is exposed to the outside, and

wherein the second heat conductive member contacts the portion where the shield member is exposed to the outside, covers the removed part of the first insulation tube, and contacts the distal end side of the connection pipe.

16. The ultrasonic endoscope according to claim 11 ,

wherein the jacket of the cable portion is removed on the distal end side of the connection pipe and the shield member is exposed,

wherein, at a portion where the jacket is removed and the shield member is exposed to the first insulation tube, a part of the first insulation tube is removed, and the shield member is exposed to the outside, and

wherein the second heat conductive member contacts the portion where the shield member is exposed to the outside, covers the removed part of the first insulation tube, and contacts the distal end side of the connection pipe.

17. The ultrasonic endoscope according to claim 12 ,

wherein the jacket of the cable portion is removed on the distal end side of the connection pipe and the shield member is exposed,

wherein, at a portion where the jacket is removed and the shield member is exposed to the first insulation tube, a part of the first insulation tube is removed, and the shield member is exposed to the outside, and

wherein the second heat conductive member contacts the portion where the shield member is exposed to the outside, covers the removed part of the first insulation tube, and contacts the distal end side of the connection pipe.

18. The ultrasonic endoscope according to claim 15 , further comprising:

an insulation layer that is disposed outside of the connection pipe.

19. The ultrasonic endoscope according to claim 1 , further comprising:

a third heat conductive member that fills a space between the first insulation tube, and a portion of the connection pipe on the proximal end side and the second insulation tube.