Ultrasonic endoscope and method of manufacturing the same
The present invention provides an ultrasonic endoscope in which wiring can be reliably fixed to a wire housing space of an ultrasonic-oscillator housing part, and a method of manufacturing the ultrasonic endoscope. According to the present invention, a wire housing space is encapsulated from the outside by sealing a gap formed between an ultrasonic oscillator and an ultrasonic-oscillator housing part with sealing members. With this configuration, the wire housing space can be sufficiently filled with filling agent for fixing wires in the wire housing space. This achieves an ultrasonic endoscope in which the wires can be reliably fixed to the wire housing space of the ultrasonic-oscillator housing part.
1. An ultrasonic endoscope comprising:
an insertion unit configured to be inserted into an inside of the body;
a distal end part body provided to a distal end of the insertion unit;
an ultrasonic observation unit provided to the distal end part body;
an ultrasonic oscillator provided to the ultrasonic observation unit and including an observation surface through which ultrasonic waves are communicated, side surfaces adjacent to the observation surface, a bottom surface opposite to the observation surface, a piezoelectric element, and a backing material provided to the bottom surface of the piezoelectric element;
a wiring connection unit provided to the ultrasonic oscillator and connected with wiring for supplying a drive voltage to the ultrasonic oscillator;
an ultrasonic-oscillator housing part covering the side surfaces and the bottom surface of the ultrasonic oscillator, housing the ultrasonic oscillator, and including a wire housing space in which the wiring is housed, on a side on which the bottom surface of the ultrasonic oscillator is housed;
an acoustic lens made of resin covering the observation surface of the ultrasonic oscillator and adhered to the ultrasonic-oscillator housing part; and
a first sealing member that seals a gap formed between the ultrasonic oscillator and the ultrasonic-oscillator housing part, wherein
the acoustic lens has a fixing part which is filled between the side surfaces of the ultrasonic oscillator and the ultrasonic-oscillator housing part, and
the first sealing member is provided in a space defined by an end of the fixing part of the acoustic lens on a side of the bottom surface of the ultrasonic oscillator, the ultrasonic-oscillator housing part and the side surfaces of the ultrasonic oscillator.
2. The ultrasonic endoscope according to claim 1 , wherein the first sealing member is provided between the ultrasonic-oscillator housing part and two side surfaces parallel to a longitudinal axis of the insertion unit and facing to each other among the side surfaces of the ultrasonic oscillator and are provided between the ultrasonic-oscillator housing part and two side surfaces intersecting with the longitudinal axis of the insertion unit and facing to each other among the side surfaces of the ultrasonic oscillator.
3. The ultrasonic endoscope according to claim 1 , wherein the first sealing member is provided between the ultrasonic-oscillator housing part and two side surfaces parallel to a longitudinal axis of the insertion unit and facing to each other among the side surfaces of the ultrasonic oscillator and are provided between the ultrasonic-oscillator housing part and two side surfaces intersecting with the longitudinal axis of the insertion unit and facing to each other among the side surfaces of the ultrasonic oscillator.
4. The ultrasonic endoscope according to claim 1 , wherein the first sealing member has a uniform thickness in a normal direction of a surface of the first sealing member, which is in contact with a corresponding one of the side surfaces of the ultrasonic oscillator when the ultrasonic oscillator is housed in the ultrasonic-oscillator housing part.
5. The ultrasonic endoscope according to claim 1 , wherein the first sealing member has a uniform thickness in a normal direction of a surface of the first sealing member, which is in contact with a corresponding one of the side surfaces of the ultrasonic oscillator when the ultrasonic oscillator is housed in the ultrasonic-oscillator housing part.
6. The ultrasonic endoscope according to claim 2 , wherein the first sealing member has a uniform thickness in a normal direction of a surface of the first sealing member, which is in contact with a corresponding one of the side surfaces of the ultrasonic oscillator when the ultrasonic oscillator is housed in the ultrasonic-oscillator housing part.
7. The ultrasonic endoscope according to claim 3 , wherein the first sealing member has a uniform thickness in a normal direction of a surface of the first sealing member, which is in contact with a corresponding one of the side surfaces of the ultrasonic oscillator when the ultrasonic oscillator is housed in the ultrasonic-oscillator housing part.
8. The ultrasonic endoscope according to claim 4 , wherein the first sealing member is elastic in a thickness direction corresponding to the normal direction.
9. The ultrasonic endoscope according to claim 5 , wherein the first sealing member is elastic in a thickness direction corresponding to the normal direction.
10. The ultrasonic endoscope according to claim 6 , wherein the first sealing member is elastic in a thickness direction corresponding to the normal direction.
11. The ultrasonic endoscope according to claim 7 , wherein the first sealing member is elastic in a thickness direction corresponding to the normal direction.
12. The ultrasonic endoscope according to claim 1 , further comprising a second sealing member provided between the bottom surface of the ultrasonic oscillator and the ultrasonic-oscillator housing part.
13. The ultrasonic endoscope according to claim 1 , further comprising a second sealing member provided between the bottom surface of the ultrasonic oscillator and the ultrasonic-oscillator housing part.
14. The ultrasonic endoscope according to claim 1 , wherein the wiring connection unit is provided on the bottom surface of the ultrasonic oscillator.
15. The ultrasonic endoscope according to claim 12 , wherein the wiring connection unit is provided in a central part of the bottom surface, and the second sealing member is provided in a peripheral part of the bottom surface.
16. The ultrasonic endoscope according to claim 13 , wherein the wiring connection unit is provided in a central part of the bottom surface, and the second sealing member is provided in a peripheral part of the bottom surface.
17. The ultrasonic endoscope according to claim 14 , wherein the wiring connection unit is provided in a central part of the bottom surface, and the first sealing member is provided in a peripheral part of the bottom surface.
18. The ultrasonic endoscope according to claim 1 , wherein the resin is thermoplastic resin.