Operation switching mechanism, endoscope

A technology for switching mechanisms and actions, applied in endoscopes, telescopes, medical science, etc., can solve the problems of high risk of failure, high cost, complex structure, etc.

Active Publication Date: 2017-08-01
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the structure using the shape memory alloy for the operation switching mechanism has the following problems: not only the assembly cost becomes high because the assembly is difficult, but also the manufacturing cost becomes high because the shape memory alloy is expensive. Also, the movement control of the zoom lens using a shape memory alloy is complicated, resulting in a high risk of failure
[0008] In addition, there is a problem that if the shape memory alloy is energized in order to shrink the shape memory alloy, the shape memory alloy generates heat, so not only a heat release structure is required in the insertion part of the endoscope, but also a separate heat dissipation structure is required on the insertion part. Watertight structure for ensuring watertightness of shape memory alloy
[0011] However, in the structure described in Japanese Patent Application Laid-Open No. 2000-221415, there is the following problem: Since the action switching mechanism is provided in the insertion part and the slide pin is used separately, so in addition to hindering the reduction in the diameter of the insertion part, the structure also changes. complicated
[0012] In addition, since the position of the zoom lens can be fixed at an intermediate position between the front position and the rear position in the longitudinal direction in addition to the front position and the rear position, for example, the wire may interfere with the curved part or flexure in the insertion part. The deformation of the tube part moves in conjunction with the deformation, or the wire moves due to interference with the bending operation part during the bending operation of the bending part, etc., which may cause the zoom lens to move from the front position to the rear position. Unexpected movement along the length between
[0013] In this case, in a structure in which the optical system is set so that the focus of the optical system is aligned only with the front position and the rear position as switching positions of the linear switch, there is a problem that the focus shifts at the intermediate position

Method used

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  • Operation switching mechanism, endoscope
  • Operation switching mechanism, endoscope
  • Operation switching mechanism, endoscope

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Experimental program
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Effect test

no. 1 Embodiment approach

[0045] figure 1 It is a perspective view showing the appearance of an endoscope having the operation switching mechanism of this embodiment, Figure 2A is to be set at figure 1 A partial cross-sectional view showing the optical system in the front end of the insertion part of the endoscope together with the frame and the elongated member holding the optical system, Figure 2B is showing Figure 2A Partial cross-sectional view of the state where the operating part of the Figure 2C is showing Figure 2A Partial cross-sectional view of the state where the operating part of is moved to the rear in the longitudinal direction.

[0046] Such as figure 1 As shown, the main part of the endoscope 1 is composed of: an insertion part 2, which is inserted into the body of the subject; an operation part 3, which is connected to the proximal end side of the insertion part 2; The operation part 3 is extended; and a connector 9 is provided at an extended end of the universal cord 8 . I...

no. 2 Embodiment approach

[0130] Figure 13 It is a partial cross-sectional view schematically showing the operation switching mechanism of the present embodiment in which the operation member is in the third state and the reciprocating member is in the second moving position, Figure 14 is roughly showing Figure 13 A partial cross-sectional view of the action switching mechanism in which the operating member is in the first state and the reciprocating moving member is in the second moving position.

[0131] and, Figure 15 is roughly showing Figure 14 A partial cross-sectional view of the action switching mechanism in which the operating member is in the second state and the reciprocating moving member is in the first moving position, Figure 16 is roughly showing Figure 15 A partial cross-sectional view of the action switching mechanism in which the operating member is in the first state and the reciprocating moving member is in the first moving position.

[0132] The configuration of the ope...

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Abstract

In the present invention, the following are provided: a wire (51); a reciprocating-motion member (55); a first biasing member (53); a second biasing member (54); switching members (57, 59) that switch the biasing state of the first biasing member (53) and the second biasing member (54); and an operation member (52) that causes the switching members (57, 59) to operate as a result of an external operation, and that causes the reciprocating-motion member (55) to move to either a first movement position or a second movement position (P2).

Description

technical field [0001] The present invention relates to a motion switching mechanism and an endoscope, wherein the motion switching mechanism has an elongated member that transmits a force for moving an operating part. Background technique [0002] In recent years, endoscopes have been widely used in the medical and industrial fields. With regard to the endoscope used in the medical field, by inserting the elongated insertion part into the body cavity of the subject, the internal organs in the body cavity can be observed by means of the optical system of the insertion part, or used as needed Various treatments are performed by inserting the treatment instrument into the insertion channel of the treatment instrument included in the endoscope. [0003] And, with regard to the endoscope used in the industrial field, by inserting the elongated insertion part of the endoscope into the subject such as jet engine or factory piping, the optical system that the insertion part has ca...

Claims

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Application Information

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IPC IPC(8): A61B1/00G02B23/24G02B23/26
CPCA61B1/00G02B23/2407A61B1/00188G02B23/26G02B23/24A61B1/0019A61B1/0052A61B1/00163A61B1/00002A61B1/00064A61B1/00121
Inventor吉永卓斗樋野和彦
OwnerOLYMPUS CORP