JP2001027733A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope which allows the stable energization of a member which comes into friction contact with a moving body of an actuator for moving an optical lens. SOLUTION: This endoscope includes an insertion part which is inserted into a section to be inspected, the actuator which is disposed in this insertion part, has the moving body 59 moved back and forth by the rapid deformation of a piezoelectric element and moves the lens of an objective lens optical system of the endoscope by the forward and backward movement of the moving body, holding means 60 and 56 which hold the moving body by friction force and energizing means 61 and 83 which energize the holding means with respect to the moving body. The energizing means, the holding means and the moving body are formed as separated bodies from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having a piezoelectric actuator for driving a driven body by an impact force utilizing expansion and contraction of a piezoelectric element.

[0002]

2. Description of the Related Art Conventionally, a piezoelectric actuator that drives a driven body by utilizing deformation of a piezoelectric element is generally known. Such piezoelectric actuators are widely used in the field of endoscopes. For example, an optical lens of an observation optical system is used to change (magnification), focus, and zoom an observation optical system of the endoscope. It is moved by a piezoelectric actuator.

In the technique disclosed in Japanese Patent Application Laid-Open No. 6-22903, a piezoelectric actuator is used for moving an optical lens. That is, the piezoelectric actuator disclosed in this publication is configured by fixing an inertial body to a moving body held by a frictional force in a fitted state in a housing via a piezoelectric element that can expand and contract in the axial direction by an applied voltage. .
The piezoelectric actuator moves in the axial direction by utilizing a difference between an inertial force of the inertial body when the piezoelectric element is rapidly deformed in the axial direction and a frictional force received by the moving body from the inner surface of the housing. Is what you do.

[0004]

In the piezoelectric actuator disclosed in Japanese Patent Application Laid-Open No. Hei 6-22903, at least one of the moving body and the housing is connected to the moving body and the housing by an elastic urging force. A pressing force applying means for pressing (biasing) the pressure is provided.

However, when the pressing force applying means is formed integrally with the moving body or the housing as described above, the pressing force applying means is easily affected by the heat of the moving body and the housing caused by friction, and the pressing force ( (Biasing force) cannot be stably applied.

The present invention has been made in view of the above circumstances, and has as its object to stably urge a member that comes into frictional contact with a moving body of an actuator that moves an optical lens. It is to provide an endoscope which can do it.

[0007]

In order to solve the above-mentioned problems, an endoscope according to the present invention is provided with an insertion portion to be inserted into a portion to be inspected, and provided in the insertion portion, and by rapid deformation of a piezoelectric element. An actuator for moving the lens of the objective optical system of the endoscope by reciprocating the moving body, holding means for holding the moving body by frictional force, and moving the holding means There is provided an urging means for urging the body, and the urging means, the holding means, and the moving body are formed separately from each other.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 18 show a first embodiment of the present invention.

As shown in FIGS. 1 and 2, a magnifying observation endoscope system 1 according to the present embodiment includes a magnifying electronic endoscope 2, a video processor 3, a light source device 4, and a magnifying operation. A foot switch 5 for performing the operation, a magnification observation controller 10 for controlling magnification, and a monitor 6 connected to the video processor 3 and displaying an observation image are provided. In addition, the video processor 3 includes a comparing unit 7 for comparing the current observation image with the past observation image, a storage unit 8 for storing the past observation image and its diagnosis result, and a storage unit 8 for storing the past observation image. A superimposing section 9 for displaying comparison information on a monitor 6;

The magnifying electronic endoscope 2 includes an insertion section 11, an operation section 12, a connector section 13, and a connection cord section 14 connecting the operation section 12 and the connector section 13. The first connector 13a of the connector section 13 is detachably connected to the socket 4a of the light source device 4. The second connector 13b of the connector section 13 is detachably connected to the socket 3a of the video processor 3 via a curl cord 26.

The insertion portion 11 has a tip portion 15 and a bending portion 16.
And a flexible tube portion 17. In the tip part 15,
An illumination window 18 for projecting light from the light source device 4 and an imaging unit 19 for imaging an observation image are incorporated. Light from the light source device 4 is guided to the illumination window 18 via the connector 13 a and the light guide fiber 32. The imaging unit 19 includes a solid-state imaging device unit (hereinafter, referred to as a CCD unit) 20, an objective unit 21, and an actuator unit 22 that moves a zoom lens 23 of the objective unit 21.

The operation unit 12 includes a capture switch (not shown) for sending an observation image to the comparison unit 7 to start comparison and examination, and a mode changeover switch (not shown) for changing a control method of the actuator unit 22. ) Are provided. The operation unit 12 is provided with a zoom switch 24 for operating the actuator unit 22. The zoom switch 24 is connected to an actuator control unit 25 of the magnifying observation controller 10, and a signal from the zoom switch 24 is input to the actuator control unit 25. The actuator control unit 25 is connected to and controls an actuator drive unit 27 that drives the actuator unit 22.

The control modes of the actuator unit 22 in this embodiment include, for example, a speed mode and a step mode. In speed mode, switch is O
During N, a command to drive the actuator unit 22 is sent from the actuator control unit 25 to the actuator drive unit 27. In the step mode, a command to drive the actuator unit 22 by the number of times the switch is turned on for a certain period of time is issued by the actuator control unit 25.
Is sent to the actuator drive unit 27 from the controller. That is,
The actuator control section 25 has a function of transmitting an actuator unit drive command corresponding to the mode selected by the mode changeover switch to the actuator drive section 27. Power is supplied from the power supply unit 99 to the actuator control unit 25 and the actuator drive unit 27.

A connector / socket (not shown) is provided on the rear panel of the magnifying observation controller 10, and a foot switch 5 for driving and operating the actuator unit 22 is detachably connected to the connector / socket. I have. In this case, a signal from the foot switch 5 is input to the actuator control unit 25.

Further, as shown in FIG. 3, the heat-shrinkable tube 511 and a polyimide insulating tape or the like are provided so that the metal part is not exposed to the outside of the imaging unit 19.

The actuator unit 22 and the actuator driving section 27 are connected to each other by a multi-core composite cable 28 as an actuator driving cable. As shown in detail in FIG. 3, the composite cable 28 is formed by winding a metal-deposited resin tape 31, a shield 30, and a metal-deposited resin tape 31 on the outside of an actuator driving cable 29, and using an outer skin 28 a. It is constituted by coating. The winding directions of the resin tapes 31 may be both left-handed or both right-handed, or may be different from each other. In addition, the shield 30 may be of an oblique type or may be of a right-handed or left-handed type.

As shown in detail in FIG. 6, the objective unit 21 includes a plurality of lenses 23..., 36a to 36f for forming an observation image on a solid-state image pickup device (CCD) 35.
36A, 36B, and 36C, apertures 37a to 37h, and lens frames 38A to 38E. In this case, the objective lenses 38a, 38b, and 38c are held by the lens frame 38E, and the objective lenses 38d, 38e, and 38f are maintained at a predetermined distance from each other by the spacing tubes 38a and 38b. , 38C, 36A, 36B, 36C are held by a lens frame 38D, and the zoom (magnification) lens 23 is held by a zoom lens frame 38A.

The zoom lens frame 38A is fitted in the lens frame 38B so as to be slidable along the optical axis while being guided by the lens frame 38D. Also, the ridge 310 of the sliding portion between the zoom lens frame 38A and the lens frame 38B is rounded as shown in FIG. 25 (a) or chamfered as shown in FIG. 25 (b). (The ridge 310 on the lens frame 38B side is not shown). When the zoom lens 23 is moved to the left in the figure together with the zoom lens frame 38A, the wide angle (W
(IDE), and when the zoom lens 23 is moved to the right side in the figure together with the zoom lens frame 38A, the enlargement (TELE) is set. In addition, as a form in which a stop 37b is provided in the spacing tube 38a located on the distal end side of the lens frame 38B, a separate stop 37b is fixed to the spacing tube 38a as shown in FIGS. 23 (b), the spacing tube 38a
By forming a tapered surface 304a on the inner protruding portion 304 at the edge of the gap, an aperture 37b may be provided integrally with the spacing tube 38a.

A slit 39 is provided in a lens frame 38B for slidably holding the zoom lens frame 38A.
The handle 40 extending from the zoom lens frame 38A is the slit 3
Extending through 9. A coupling portion 41 to which the actuator unit 22 is coupled is formed in the handle portion 40, and the coupling portion 41 is provided with a coupling hole 41a.

The distance between the lens surfaces of the lenses 36A and 36B located on the rear side of the zoom lens 23 is set wide. Therefore, the light beams passing through these lenses 36A and 36B are substantially parallel to the optical axis. Therefore, a light-shielding line 42a is provided on the inner surface of the spacer 42 disposed between the lenses 36A and 36B.

The objective unit 21 is provided with a ring 43 for adjusting the resolving power. The ring 43 has a shape as shown in FIG. 5A, and has a plurality of through holes 45 on the peripheral surface. Also, the ring 43
It is arranged so that its central axis is located on the optical axis of the objective unit 21. Note that a ring 44 having a shape as shown in FIG. 5B may be used as the ring for adjusting the resolving power.

The zoom lens frame 38A includes a lens frame 38.
A projection 46 that contacts the ring 43 is provided in the slit 39 of B. Further, a plurality of through holes 47 for venting air are provided in a portion of the zoom lens frame 38A located around the zoom lens 23. Also,
A plurality of through holes 48 for venting air are also provided in the stop 37e bonded and fixed to the zoom lens frame 38A. In this case, the inner diameter of the through hole 47 of the zoom lens frame 38A is
It is set to be equal to or larger than the inner diameter of the through hole 48 of the aperture 37e. The central axis of the through hole 47 is shifted from the central axis of the through hole 48. Specifically, the central axis of the through hole 47 is inside the central axis of the through hole 48 (on the optical axis side of the objective unit 21). It is located at.

Also, the aperture 37e of the zoom lens frame 38A.
In order to prevent harmful light from entering the rear lens 36A through the plurality of through holes 48 provided in the
The plurality of through holes 48 are provided with a predetermined positional relationship with the opening of the stop 37f of the lens frame 38D. That is, as shown in FIG. 24A, assuming that the diameter of an imaginary circle C centered on the opening center O of the stop 37e of the zoom lens frame 38A and in contact with each through hole 48 is ΦB,
B is the aperture diameter ΦA of the aperture 37f of the lens frame 38D (FIG. 24).
(See (b)).

The objective unit 21 has an actuator insertion hole 34 into which an later-described outer pipe 55 of the actuator unit 22 is inserted and fitted, and an outer pipe 5.
A hole 89 to which the fifth pipe stopper 87 is adhered and fixed is formed.

As shown in detail in FIG. 7, the CCD unit 20 includes a CCD 35 and a CC holding the CCD 35.
A D frame 49, an IC substrate 50 having a circuit for driving the CCD 35 to amplify signals, and a multi-core composite cable 5 for transmitting signals from the CCD 35 and supplying power to the CCD 35
1, CCD 35, IC board 50, and multi-core composite cable 5
1 and a plurality of electric cables 52.
A shield frame 53 is provided to cover the D frame 49, the CCD 35, the IC substrate 50, and the tip of the multi-core composite cable 51. The IC substrate 50 is bonded and fixed to the CCD frame 49. The CCD 35 and the IC board 50 are connected via electric cables 52. The shield frame 53 is tied and fixed to the multi-core composite cable 51 with a thread 54,
It is connected and fixed to the D frame 49 and the IC substrate 50. An adhesive S is filled around the CCD 35, the substrate 50, and the cable 52. In addition, since the diameter of the shield frame 53 is small on the base end side, the corner 320 of the shield frame 53 is not easily filled with the adhesive. Therefore, in the present embodiment, as shown in FIG. 18, a hole 321 is provided in the corner 320, and the corner 320 is filled with the adhesive without any gap. This hole 320 may be provided at one location or at two or more locations so as to sandwich the multi-core composite cable 51.

Further, in order to prevent the multi-core composite cable 51 from being damaged by the bending operation of the endoscope 2, a buckle may be interposed between the multi-core composite cable 51 and the shield frame 53. Specifically, as shown in FIG. 26, a heat-shrinkable tube 315 is interposed between the multi-core composite cable 51 and the shield frame 53. In this case, heat shrink tube 3
Reference numeral 15 is fitted on the end of the multi-core composite cable 51 and extends from the end of the multi-core composite cable 51 over a length exceeding the end of the shield frame 53. Further, the outer periphery of the heat shrinkable tube 315 may be covered with a gore tube 316.
In this case, the length of the gore tube 316 may be shorter than the length of the heat shrink tube 315.

In the present embodiment, the electric cable 5
2 is a single-core cable, but a parallel multi-core cable (flat cable) may be used. Further, the shield frame 53 need not be tied with the thread 54. Also, CCD
The positional relationship between the center of 35 and the center of the multi-core composite cable 51 can be changed as appropriate according to the relationship with the other internal components of the insertion section 11 of the endoscope 2.

As shown in FIG. 8, the actuator unit 22 includes an outer pipe 55 inserted and fitted into the actuator insertion hole 34 of the objective unit 21, a guide 56 inserted into the outer pipe 55, and a guide 56 that slides on the guide 56. Movable unit 59 to be inserted, and spring unit 5 for urging movable unit 59 against guide 56
7 and a pressing ring 58 for pressing the spring unit 57 against the outer pipe 55 side.

As shown in FIG. 9, the mobile unit 5
Reference numeral 9 denotes an element base 63, a piezoelectric element 62 one end of which is adhesively fixed to the element base 63, and a sliding pipe 66 which is adhesively fixed to the element base 63 to form a sliding surface of the mobile unit 59. And an element holder 64 adhered and fixed to the tip of a sliding pipe 66; an insulating pipe 65 provided around the piezoelectric element 62; and a curl lead wire 67 electrically connected to the piezoelectric element 62. are doing.

The curl lead wire 67 has two single wires 69,
70 is formed by forming a two-core parallel line into a coil shape. Each single wire 69, 70 is connected to the element base 6
3 through the holes 71 and 72 provided in the element base 63.
And the tip thereof is attached to the piezoelectric element 6.
The second electrode surfaces 62a and 62b are soldered. In this case, soldering is performed on the element base 63 as much as possible.

The element base 63 is provided with an accommodating portion 73 for accommodating the jacket end 67a of the curl lead wire 67. The element base 63 is filled with an elastic body (silicon rubber in this embodiment) 74 so as to cover the jacket end 67a. The insulating pipe 65 is preferably made of an insulating plastic such as polyimide, and an elastic body (in the present embodiment, silicon rubber) 75 is filled between the insulating pipe 65 and the piezoelectric element 62. The elastic body 75 may be impregnated with a fine spherical body having an insulating property such as glass beads or zirconia as a filler.

The element holder 64 is provided with a slit 76 slightly wider than the width of the piezoelectric element 62. Also,
A gap 7 is provided between the element holder 64 and the piezoelectric element 62 (the side opposite to the adhesive fixing portion 77 between the piezoelectric element 62 and the element base 63).
8a are formed. The element holder 64 has a coupling portion 41 provided on the handle portion 40 of the zoom lens frame 38A.
Is provided. The fixing portion 78 includes a slit portion 79 into which the coupling portion 41 is fitted, and a coupling pin 80 (FIG. 1) for connecting the fixing portion 78 and the coupling portion 41.
6) is provided.
As shown in FIG. 15, a hole 81a smaller than the outer diameter of the coupling pin 80 is formed in the fixing portion 78 so as to communicate with the coupling hole 81. Note that the coupling pin 80 may be a pipe.

The material of the sliding pipe 66 is S
US316, Ti alloy, ceramics, resin and the like having good wear resistance and corrosion resistance are used. Also, using a stainless steel pipe or the like as a base material, depositing TiN or CrN on the surface, Ni-based SiC-containing plating, Ni-based tungsten-containing plating, or Ni-based PTFE.
Inclusion plating or the like may be applied. The sliding surface of the sliding pipe 66 is subjected to centerless polishing to increase the surface accuracy. The polishing method is not limited to this, and may be electrolytic polishing, composite electrolytic polishing, or the like.

As shown in FIGS. 4, 8, 10 and 11, a lid 68 is provided at the base end of the curled lead wire 67. The cover 68 is provided with a screw hole 82 for fixing the actuator unit 22 to the objective unit 21.

As shown in FIGS. 12 and 13, the spring unit 57 includes a saddle-shaped friction member 60,
It has a belt 83 bonded and fixed to the concave portion of the friction member 60, a leaf spring 61, a caulking pin 84, and screw receivers 85 and 85 bonded and fixed to the leaf spring 61. in this case,
The belt 83 and the leaf spring 61 are caulked by a caulking pin 84 and are adhesively fixed.

As shown in FIGS. 8 and 13, a friction member 60 is attached to the screw receivers 85, 85.
A screw 86 which is abutted against the outer pipe 55 to be pressed against the screw 9 is screwed. The outer pipe 55 has a flat contact surface 55a with which the tip of the screw 86 contacts.
Are formed.

The curvature of the friction sliding surface of the friction member 60 abutted (contacted) on the moving body unit 59 is slightly larger than the curvature (outer diameter) of the outer surface of the sliding pipe 66 of the moving body unit 59. Is set. Also, the friction member 60
SUS316, SUS317, Ti,
Those having good corrosion resistance and abrasion, such as Ni alloy, ceramics and resin, are used. Alternatively, a base material such as stainless steel, aluminum, or a copper alloy may be used, and the surface thereof may be subjected to vapor deposition of TiN, CrN, or the like, Ni-based SiC-containing composite plating, or Ni-based tungsten-containing plating. Alternatively, oxalic acid alumite treatment may be performed using aluminum as a base material and impregnated with Teflon or the like. Note that protrusions 90 are formed at both ends of the friction member 60.

The leaf spring 61 presses the friction member 60 against the moving body unit 59 to move the moving body unit to the guide 5.
6 in the direction of pressing. Therefore, it is preferable that the leaf spring 61 is formed of an elastic member such as phosphor bronze, beryllium copper, or stainless steel rope for spring. Of course, a superelastic alloy or the like may be used.

As shown in FIG. 14, the guide 56 is
The inner diameter is set slightly larger than the outer diameter of the sliding pipe 66 of the moving body unit 59. Therefore, the contact portion between the guide 56 and the moving body unit 59 is linear, and the contact surface pressure between them can be reduced. Guide 5
6, a notch 56a is formed on the tip side. The length of the notch 56a is
Is set to be longer than the moving range. The height of the cutout portion 56a is set to a height at which the coupling hole 81 of the movable body unit 59 is at least half hidden so that the coupling pin 80 does not fall off when the movable body unit 59 is disposed in the guide 56. I have. Of course, the height of the notch portion 56a may be set to a height at which all the coupling holes 81 are exposed when the mobile unit 59 is disposed in the guide 56. However, in this case, it is necessary to bond and fix the coupling pin 80 and the element holder 64 so that the coupling pin 80 does not fall off. More specifically, as shown in FIG. 15, in a state where the coupling pin 80 is inserted into the interior of the coupling hole 81 and abuts against the step between the coupling hole 81 and the small hole 81 a,
The gap formed between the insertion port 81b and the coupling pin 80 is filled with the elastic adhesive 330 so as not to protrude from the insertion port 81b.

The material of the guide 56 is SUS
316, SUS317, Ti, Ni alloy, ceramics such as alumina, and resins having good corrosion resistance and wear resistance, such as resin, are used. Further, a base material such as stainless steel, a copper alloy, or aluminum may be subjected to vapor deposition of TiN, CrN, or the like, plating of Ni-based SiC, plating of Ni-based tungsten, plating of Ni-based PTFE, or the like. In any case, it is desirable that the sliding pipe 66, the guide 56, and the friction member 60 that are in contact with each other are formed of different materials. The guide 56 uses a pipe material as a material. This pipe is preferably made of a semi-seamless pipe. Also, a seamless pipe may be used.

As shown in FIG. 16, the outer pipe 5
A pipe stopper 87 is adhered and fixed to the tip of 5. The guide 56 inserted into the outer pipe 55 is adhered and fixed to the outer pipe 55 at a position where its tip abuts on a pipe stopper 87 (see FIGS. 3 and 8). Pipe stop 8
7, a coupling portion 41 of the handle portion 40 of the zoom lens frame 38A.
Are formed. Also,
As will be described later, the pipe stopper 87 is adhesively fixed to a hole 89 provided in the lens frame 38B of the objective unit 21 so that the central axis of the guide 56 and the optical axis of the objective unit 21 are parallel.

As shown in FIG. 14, the holding ring 5
8 has fitting holes 91 for fitting with the protrusions 90 at both ends of the friction member 60. Further, the width of the fitting hole 91 is set to be slightly smaller than the width of the friction member 60. The holding ring 58 is formed so as to be fitted and fixed to the outer peripheral surface of the outer pipe 55 by interference fit.
The holding ring 58, the outer pipe 55, and the belt 8
3 may be adhered and fixed to each other. When the belt 83 and the holding ring 58 are bonded and fixed, it is desirable to provide a confirmation hole 340 in the holding ring 58 as shown in FIGS. Also, press ring 5
It is desirable that the bonding between the belt 8 and the belt 8 is performed only on the side where the confirmation hole 340 is provided. When bonding is performed on both sides, it is desirable to fix one side with an elastic adhesive.

As shown in FIGS. 2, 3, and 17, the actuator unit 22 and the actuator driving unit 27
Are electrically connected by an actuator cable unit 92 having the multi-core composite cable 28. As shown in detail in FIG. 17, the actuator cable unit 92 includes a column 93 that is bonded and fixed to the objective unit 21, a multi-core composite cable 28, and a composite cable 28.
From the outside. The column 93 is provided with a hole 300 (FIG. 4) provided in the objective unit 21.
), And a plate-like portion 93b tied integrally with the protective tube 94 by the thread 95 and adhered and fixed.

Next, the CCD constituting the imaging unit 19
An assembling procedure of the unit 20, the objective unit 21, and the actuator unit 22 will be described.

First, the zoom lens frame 38A is wide-angle (WI
DE) side, the fitting part 33A (formed at the tip of the CCD frame 49) of the CCD unit 20 to which the adhesive is applied is inserted into the CCD unit fitting hole 33 (the lens frame 38B) of the objective unit 21. With zoom lens frame 38A
(Formed at the base end of the lens frame 38D on the near side that slidably holds the lens) (see FIGS. 3 and 18). At this time, the relative position between the CCD unit 20 and the objective unit 21 is determined while adjusting the depth of field and the resolution on the wide angle side. The relative position is determined, for example, by imaging the resolution chart or the like in a state where a resolution chart or the like (not shown) is placed at a predetermined distance from the objective unit 21 and the CCD unit 20 is positioned at a position where the specified chart can be resolved. This is done by positioning. At this time, a relative angle around the optical axis between the objective unit 21 and the CCD unit 20 is set to a predetermined angle by using a jig or the like.

As described above, the objective unit 21
Are the front group including the lens frame 38B and the zoom lens frame 38.
A, and a rear group mainly composed of a lens frame 38D to which the CCD unit 20 is assembled.
When assembling the 8A with the rear group, the optical axis of the front group and the optical axis of the rear group must match. Also, at the time of assembly, the optical axes of the front group and the rear group, the center axis of the actuator insertion hole 34 to which the actuator unit 22 is mounted, and the center axis of the slit 39 provided in the lens frame 38B are located on the same plane. It must be set so that the handle 40 of the zoom lens frame 38A moves within this plane. Such setting is performed using a jig (not shown). The form of the jig may be any configuration, and the reference position that the jig suppresses for positioning may be any position according to the jig.

After the objective unit 21 and the CCD unit 20 are assembled and the depth of field and the resolving power on the wide-angle side are adjusted, the resolving power and the magnification on the enlargement side are adjusted. That is, first, with the zoom lens frame 38A positioned on the enlargement side, a rod is inserted into the hole 45 provided in the resolution adjusting ring 43 (44), and the ring 43 (44) is inserted.
Is rotated about the optical axis. Thereby, the ring 43
(44) Press the projection 46 of the zoom lens frame 38A to move the zoom lens frame 38A to the wide angle side along the optical axis direction. Also in this case, similarly to the adjustment on the wide angle side, the resolution chart and the like are imaged in a state where the resolution chart and the like are placed at a predetermined distance from the objective unit 21, and a position or a specified position where the specified chart can be resolved. The rotation of the ring 43 (44) is stopped at the position where the magnification is obtained, and the ring 43 (44) is fixed to the objective unit 21 with an adhesive at this position.

As described above, the objective unit 21 and the CC
After the assembly of the D unit 20 is completed, the actuator unit 22 is attached to the objective unit 21 next. That is, first, the friction member 60 of the spring unit 57 is fitted to the holding ring 58, and this (the holding ring 58 and the spring unit 57) is attached to the lens frame 3 of the objective unit 21.
It is located below the 8B slit 39 (see FIG. 3).
Next, the outer pipe 55, the pipe stopper 87, and the guide 56
Is inserted through the holding ring 58 and the spring unit 57 while being inserted through the insertion hole 34 of the objective unit 21. And the holding ring 5
8 is fitted to the outer pipe 55 by interference fit. At this time, the leaf spring 61 of the spring unit 57 is disposed along the center axis direction of the guide 56, that is, along the direction in which the moving unit 59 moves. In this case, the spring unit 57
The friction member 60 and the moving body unit 59, the belt 83, the pressing ring 58, the leaf spring 61 and the lens frame 3
Positioning is performed with grooves 350 (see FIGS. 6 and 18) provided in 8B. Further, the friction member 60, the belt 83,
It is adhesively fixed so that the center axis of the leaf spring 61 coincides with the center axis. As shown in FIG. 15, an elastic adhesive 331 is provided on both sides of the joint between the lens frame 38A and the moving body unit 59.
Is applied. Note that the guide 56 and the outer pipe 55 may be formed integrally.

Subsequently, the mobile unit 59 is connected to the guide 56.
Through the zoom lens frame 38A of the objective unit 21.
With the connecting portion 41 of the handle 40 and the fixing portion 78 of the mobile unit 59 fitted together, the screw 8 of the spring unit 57 is
6 and 86, the moving unit 59 is pressed against the guide 56 by the spring unit 57 and frictionally engaged.

Next, in this state, the guide 56 and the outer pipe 55 adhered and fixed thereto are integrally rotated to expose the hole 81 of the moving body unit 59. And FIG.
As shown in (2), the pin 80 is inserted into the hole 81, and the zoom lens frame 38A and the moving body unit 59 are connected.
Thereby, the rotation of the mobile unit 59 is restricted. An elastic adhesive 330 is applied to the front surface of the pin 80 inserted into the hole 81 of the moving body unit 59 so as not to protrude from the element holder 64.

Thereafter, the guide 56 is returned to the original state, and the cover 68 is fixed to the objective unit 21 by screws with the guide 56 inserted into the hole 96 of the cover 68 (see FIGS. 3 and 8). .

Next, a hole 89 provided in the lens frame 38B is provided.
The guide 56 is hit against the lid 68 by pushing the pipe stopper 87 inserted into the lid 68 toward the lid 68. In this state, the center axis of the guide 56 and the objective unit 2
The lens frame 38B and the pipe stopper 87 are bonded and fixed so that the first optical axis is parallel to the optical axis. At this time, the lens frame 38B
The pipe stop 87 is configured so as not to abut, and the lens frame 38B and the pipe stop 87 are fixed via an adhesive.

Thereafter, the friction member 60 of the spring unit 57 is moved by the pressing ring 58 to the outer pipe 55 side (FIG. 3).
To the right of the outer pipe 55, and the holding ring 58 is bonded and fixed to the outer peripheral surface of the outer pipe 55. Thereby, the leaf spring 61
In this case, an inadvertent force is applied in the axial direction to deform the leaf spring 61 and the driving of the actuator is not adversely affected.

Next, the screw 86 of the spring unit 57 is turned to adjust the static friction force between the moving unit 59, the friction member 60 and the guide 56 to an appropriate value. When this adjustment is completed, the screw 86 is bonded and fixed to the screw back 85 and the outer pipe 55 so that the screw 86 does not rotate. Further, the pressing ring 58 and the belt 83 are adhesively fixed on only one side with an adhesive 342 as shown in FIG.
0 may be elastically pressed against the mobile unit 59. Before adjusting the static friction force to an appropriate value,
By moving the moving body unit 59 back and forth, the sliding pipe 66
The contact between the friction member 60 and the guide 56 may be improved.

By the above assembling operation, the actuator unit 22 is fixed to the objective unit 21 at two front and rear positions (a pipe stopper 87 and a lid 68). In addition,
The assembly procedure is not limited to the procedure described above.

Next, the actuator cable unit 9
2 is attached to the objective unit 21. This is performed by bonding and fixing the cylindrical portion 93a of the column 93 to the column fixing hole 300 provided on the base end surface of the objective unit 21. In this case, the curl lead wire 67 extending from the base end of the mobile unit 59 is wound around the cylindrical portion 93a of the support 93 several times. Then, the cable 29 and the single wires 69 and 70 are soldered, and the connection portion is covered with a heat-shrinkable tube 97. In this case, the inside of the heat-shrinkable tube 97 is filled with an adhesive.

The curl lead wire 67 and the cable 29
The heat-shrinkable tube 97 serving as a connection portion with the cover 9
It is fixed to 8. Note that the curl lead wire 67 may be directly connected to the actuator drive unit 27. Also,
The curl lead wire 67 may be connected to the multi-core composite cable 28 in the operation unit 12. Further, the curl lead wire 67 may be connected to the multi-core composite cable 28 in the flexible tube portion 17. Needless to say, the curl lead wire 67 is connected to the multi-core composite cable 28 at a position where it does not interfere with the end of other internal components in the insertion portion 11.
May be connected.

As shown in FIG. 3, the dustproof and waterproof cover 98 is attached to the imaging unit 19 thus assembled.
Is attached. A watertight lid 110 is fixed to a hole 89 provided in the lens frame 38B in a watertight manner. Further, a watertight cover 111 having a substantially U-shaped cross section is attached so as to cover the distal end of the actuator unit 22. Thereby, the imaging unit 19 is kept watertight. If the mobile unit 59 is caught or stopped for some reason, the mobile unit 59 may be pushed by removing the watertight lid 110 and inserting a pin (not shown) into the hole 89. Thereby, the catch of the mobile unit 59 can be released. Also, should the actuator unit 22 fail,
The cover 111 can be removed for repair.

In this embodiment, the projecting portion 20a of the CCD unit 20 (see FIG. 4) and the projecting portion of the actuator unit 22 are arranged such that the outer diameter of the distal end portion 15 becomes small.

Next, the endoscope system 1 according to the present embodiment
The operation of will be described.

First, the illumination light emitted from the light source device 4 is emitted from the illumination window 18 of the magnifying electronic endoscope 2 through the light guide fiber 32 to illuminate the field of view of the imaging unit 19. The observation image captured by the imaging unit 19 is converted into an electric signal in the CCD unit 20 and sent to the video processor 3. The video processor 3 converts the electric signal so that it can be output to the monitor 6 by the process circuit, and displays the observation image on the monitor 6.

When a capture switch (not shown) provided on the operation unit 12 is pressed during the observation, the observation image currently observed is taken into the comparison unit 7 of the video processor 3 and the image and the storage unit 8 are read. The captured past case photos are compared. As a result of the comparison, a similar case and its diagnosis result are displayed on the monitor 6 using the superimposing unit 9.

The actuator unit 22 includes the guide 5
It operates by the balance between the frictional force generated between the sliding member 6 and the sliding pipe 66 of the moving body unit 59 and the frictional member 60 of the spring unit 57 and the impact force generated by the piezoelectric element 62. The actuator drive unit 27 outputs a drive waveform shown in FIG. 19 in response to a drive command from the actuator control unit 25. In the present embodiment, (b) and (d) of FIG.
Are the drive waveforms for moving the zoom lens 23 (moving body unit 59) from the enlargement side to the wide angle side, and the waveforms shown in FIGS. This is a drive waveform for moving the unit 59) from the wide angle side to the enlargement side. The driving principle of the actuator unit 22 used in the present embodiment is the same as that of a known rapid deformation actuator, and a description thereof will be omitted.

When the driving waveforms shown in FIGS. 19A and 19C are applied from the actuator driving section 27 to the piezoelectric element 62 in the actuator unit 22 via the actuator driving cable 28, the piezoelectric element 62 extends in the extending direction. Generates an impact force. This impact force is transmitted to the sliding pipe 66 via the element base 63. This impact force is the guide 5
If the friction force generated between the sliding unit 66 and the sliding pipe 66 of the moving body unit 59 and the friction member 60 of the spring unit 57 is larger, the moving body unit 59 moves in the TELE (enlargement) direction. By repeating this operation continuously, the actuator unit 22 moves by a predetermined amount.
In this case, the mobile unit 59 operates only one step for one driving waveform, but the driving frequency is 13 kHz to
Since it is as high as 30 kHz and the amount of movement per step is on the order of submicrons, it operates as a smooth continuous movement rather than a step operation macroscopically.

Conversely, when the drive waveforms shown in FIGS. 19B and 19D are applied to the piezoelectric element 62, the piezoelectric element 62 generates an impact force that is generated in the contracting direction. This impact force is transmitted to the sliding pipe 66 via the element base 63. If the impact force is larger than the frictional force generated between the guide 56, the sliding pipe 66 of the moving body unit 59, and the friction member 60 of the spring unit 57, the moving body unit 59 moves in the WIDE (wide angle) direction.

When the zoom switch 24 provided on the operation unit 12 of the magnifying electronic endoscope 2 is pushed to the enlargement side or the wide angle side, a signal to that effect is sent to the actuator control unit 2.
5 is input. The actuator control unit 25 receives these signals and controls the actuator driving unit 27 so that the moving unit 59, that is, the variable power lens 23 moves in each direction. By pressing a predetermined magnification setting switch (not shown), the piezoelectric element 62 generates an impact force a predetermined number of times so that the variable power lens moves to a position corresponding to the magnification (that is, such a drive waveform is generated). This is input to the piezoelectric element 62). In this case, the process may be started from the bumping state on the WIDE side, or may be started from the bumping state on the TELE side. Further, the setting may be made so as to start from the one with a higher magnification accuracy. Further, the zoom switch 24 may be constituted by a multi-stage switch having two or more stages. In this case, the movement speed can be adjusted by the operation unit 12. Further, the zoom switch 24 may be made of a pressure-sensitive conductive rubber whose resistance changes according to the pressing force.

As described above, the endoscope 2 of the endoscope system 1 according to the present embodiment includes the friction portion (the holding portion that holds the moving unit 59 by the frictional force) in contact with the sliding pipe 66 of the moving unit 59. Means: guide 56 and friction member 60), and urging means (leaf spring 61, belt 8) for urging guide 56 and friction member 60 toward mobile unit 59
3, the biasing force adjusting screw 86) is formed separately.
Therefore, the urging means is less likely to be affected by the heat of the friction portion caused by friction, and can continuously apply the urging force to the friction portion. Further, the urging means can be formed of a material which is easily bent, and the friction portion can be formed of a material having high corrosion resistance and abrasion resistance.

In the endoscope 2 of this embodiment, the ring 43 (4) is rotated to rotate the ring 43 (4).
The contact position between 4) and the projection 46 provided on the zoom lens frame 38A can be changed. Therefore, it is not necessary to adjust the focus and the resolution after the actuator unit 22 is assembled (see Japanese Patent Application Laid-Open No. Hei 6-22903) (it is not necessary to adjust the focus and the resolution again when the actuator unit 22 is repaired). Go). Therefore, the actuator unit 2
2 can be replaced, and a device for driving the actuator unit 22 at the time of adjusting the resolving power becomes unnecessary.

Further, in the endoscope 2 of the present embodiment, the sliding pipe 66 of the moving body unit 59 and the friction portion (the guide 56 and the friction member 60) in contact with the sliding pipe 66 are subjected to a corrosion-resistant surface treatment. (Formed of a corrosion-resistant material). Therefore, when the endoscope 2 is used in a body or the like, is immersed in a disinfecting solution, or is exposed to high humidity, it is possible to avoid a situation in which the components constituting the actuator unit 22 are rusted. Therefore, there is no need for disassembly and repair. Further, it is possible to avoid a situation in which friction powder is generated when the actuator is driven.

Further, in the endoscope 2 of the present embodiment, the moving unit 59 is sandwiched between the friction member 60 and the inner surface of the guide 56, and the friction member 60 and the guide 56 are moved in the moving direction of the moving unit 59. Is fixed so that it does not move relatively to. Therefore, no play occurs between the friction member 60 and the inner surface of the guide 56. Therefore, the movement amount of the moving body unit 59 is not absorbed by the play, and the performance of the actuator unit 22 is improved as compared with the related art.

Further, in the endoscope 2 of the present embodiment, the friction portion (the guide 56 and the friction member 60) is
The longitudinal direction of the leaf spring 61 of the urging unit that urges the moving unit 9 coincides with the moving direction of the mobile unit 59. Therefore, it is possible to increase the deflection by setting the spring constant of the leaf spring 61 to be small (the space disclosed in the endoscope is limited, for example, the configuration disclosed in JP-A-10-150783). In this case, the spring constant cannot be set to a small value, and the deflection can be slightly reduced.) Therefore, even if the friction portion is worn by repeated sliding,
The performance of the urging means can be stably maintained.

In the endoscope 2 of this embodiment, the zoom lens frame 38A and the mobile unit 59 are connected by the connecting pins 80. Therefore, the actuator unit 22 can be easily replaced.

In the endoscope 2 of the present embodiment, the zoom lens frame 38A is provided with through holes 47 and 48 for venting air. Therefore, even if the zoom lens frame 38A is sealed without any gap in order to prevent intrusion of moisture from the outside and rattling during movement, the through hole 4
Since air can enter and exit from the outside by means of the zoom lens 7 and 48, the zoom lens frame 38A is moved when the zoom lens 23 is moved.
The air moves easily before and after the zoom lens frame 38.
A can be moved with a small force.

In the endoscope 2 of the present embodiment, the ridge 31 of the sliding contact between the lens frame 38A and the lens frame 38B.
0 has an R surface as shown in FIG.
Chamfering is performed as shown in FIG. Therefore, when the lens frame 38A slides, the chamfered portion does not rub against the lens frame 38B so that the lens frame 38A does not catch. Therefore, when zooming and moving to a wide angle, smooth zooming can be realized without rattling.

In the endoscope 2 of the present embodiment, the sliding surface of the sliding pipe 66 is subjected to centerless polishing to improve the surface accuracy. Therefore, the slidability with the guide 56 is improved, the wear powder is reduced, and the repetition resistance is improved.

The endoscope 2 of the present embodiment is configured so as to be covered with the heat-shrinkable tube 511 or a polyimide insulating tape so that the metal portion is not exposed outside the imaging unit 19. The actuator can be protected from electrostatic discharge or the like.

FIGS. 20 to 22 show a second embodiment of the present invention. The endoscope system 1A according to the present embodiment includes an actuator drive unit 27 and an actuator control unit 2
5 has the same configuration as the endoscope system 1 of the first embodiment, except that the configuration 5 is provided in the connector section 13 of the endoscope 2 and a part of the configuration of the actuator unit 22 is different. Therefore, only different points will be described below, and the same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIGS. 21 and 22, the holding ring 58 of the actuator unit 22 is provided with a drawing hole 58a. The towing arm 2 is provided in the towing hole 58a.
00 has been inserted. The rear portion 202 of the towing arm 200 is provided with an urging force adjusting screw 203 for urging the towing arm 200 toward the hand.

In the first embodiment, the moving body unit 59 uses the leaf spring 61 to move the belt 83 and the friction member 6.
It is pressed against the guide 56 via the “0”. However, if there is a gap between the fitting hole 91 of the pressing ring 58 and the friction member 60, the friction member 60
9 together with the fitting hole 91. Therefore, even when the mobile unit 59 is moved by one pulse, the mobile unit 59 receives the force returned to the original position by the leaf spring 61, and the movement efficiency is extremely deteriorated.

Therefore, in this embodiment, the towing arm 200
By pulling the holding ring 58 toward the hand side to bring the holding ring 58 into contact with the friction member 60,
The friction member 60 is prevented from moving in the fitting hole 91. That is, the towing arm 200 and the urging force adjusting screw 203
Moves the guide 56 and the friction member 60 to the mobile unit 5.
An urging force adjusting mechanism for adjusting the urging force for urging the actuator 9 is provided.

As shown in FIG. 20, the actuator drive unit 27 and the actuator control unit 25
It is provided in the connector section 13 of the endoscope 2. Also,
The power supply unit 99 is built in the video processor 3.

In the above configuration, when the screw 86 is turned, the traction force of the belt 83 can be adjusted as in the first embodiment. That is, the friction member 60 and the mobile unit 59
The frictional force between the guide and the guide 56 can be adjusted. On the other hand, when the urging force adjusting screw 203 is turned, the static friction force of the guide 56 and the friction member 60 with respect to the moving body unit 59 can be adjusted.

Here, when the traction force F1 is smaller than the static friction force F2 (the friction force generated by the urging force of the traction arm 200) (case A), the actuator unit 22
When the moving body unit 59, the friction member 60, and the guide 56 are worn by the repetitive driving, the friction member 60 cannot be pressed against the guide 56 by the traction force F1, and the friction force is reduced, and the performance of the actuator unit 22 is reduced. Deteriorates. On the other hand, when the traction force F1 is sufficiently larger than the static friction force F2 (case B), if the urging force of the urging force adjusting screw 203 is smaller than the generated force of the moving body unit 59, the friction member 60 is moved to the moving body unit. Since the moving unit 59 moves with the movement of the moving unit 59,
9 is used, and the performance of the actuator unit 22 is degraded.

However, in the case of the present embodiment, the frictional force is adjusted by the urging force adjusting screw 203 in the two cases A,
B can be set at an intermediate value, so that the performance of the actuator unit 22 is stabilized.

In this embodiment, the actuator driving section 27 and the actuator control section 25 are provided in the endoscope 2. Therefore, it is not necessary to separately prepare a driving device when using the endoscope 2.

FIGS. 27 to 35 show modifications of the first embodiment. As shown in FIG. 28, the CCD unit 20 has an aperture 37i. The aperture 37i is provided with a notch (not shown) indicating the upper side of the image. Also, the ridge 500 of the sliding contact portion between the zoom lens frame 38A and the lens frame 38D is subjected to an R surface processing as shown in FIG. 33A or a chamfering processing as shown in FIG. 33B. (The ridge 500 on the lens frame 38D side is not shown).

As shown in FIGS. 27 and 32, the CCD frame 49 is provided with a notch 502 indicating the upper side of the CCD 35. As shown in FIGS. 34A and 34B, the belt 83 is provided with holes 503 and 504 through which the caulking pin 84 passes. The hole 503 is a long hole, has a shape that is long in the moving direction of the mobile unit 59, and the hole 504 is a round hole.

As shown in FIG. 30, the holding ring 5
8 has a fitting hole 91 for fitting with the protrusions 90a and 90b of the friction member 60. As shown in FIG. 27, the pressing ring 58 has slit portions 506 on both sides.
a, 506b are provided. Also, press ring 5
8 is formed so as to be fitted and fixed to the outer peripheral surface of the outer pipe 55 by interference fit. Holding ring 58
Is in contact with the protrusion 90 a of the friction member 60 and the belt 83. The positional relationship is shown in FIG. 29 and FIG.

35 (a), (b) and (c), the manner in which the friction member 60 contacts the outer pipe 55 and the guide 56 is different. The holding ring 58 is provided with a friction member 60.
Is located so as to be entirely with the projection 90a.

In FIG. 35A, the friction member 60 is in contact with the outer pipe 55. This friction member 60
Is set to be as small as possible. Specifically, it is C0.02 or less. The material of the outer pipe 55 is SUS316, which is the same as the guide 56. Also, ceramics may be used. Further, a surface treatment such as TiCr or TiN may be performed on the contact portion.

In FIG. 35B, the friction member 60 is in contact with the guide 56. The contact portion of the guide 56 may be subjected to a surface treatment. In this case, TiN, Ti
Cr, nickel plating (impregnated with PTFE) or the like is preferable.

In FIG. 35 (c), the outer pipe 55 and the guide 56 are integrally formed, and the friction member 60 is in contact with the integrated guide 505. The contact portion of the guide 505 may be subjected to a surface treatment. In this case, TiN, TiCr, nickel plating (PTFE
Impregnation) is good.

As shown in FIG. 31, the actuator cable unit 92 includes the multi-core composite cable 28, a support 93, and a tube 94. The outer periphery of the multi-core composite cable 28 is bound by a thread 95b. In a state where the multi-core composite cable 28 is passed through the tube 94, both are tied to the support 93 with a thread 95 a, and are adhesively fixed. In this case, the thread 95a is located at the rear end of the thread 95b. The distal end of the tube 94 is cut obliquely on the side to be fixed, and is positioned such that the opening 600 is on the opposite side of the column 93. The tube 94 is preferably a gore tube or the like. Further, in order to increase the adhesiveness, it is preferable to perform a surface modification treatment. The support column 93 includes a cylindrical portion 93a inserted into a hole 300 (see FIG. 4) provided in the objective unit 21,
It comprises a plate-like portion 93b which is tied integrally with the protection tube 94 by a thread 95a and is adhered and fixed.

Next, the operation of the above modification will be described.

First, in this modification, after the assembly of the objective unit 21 and the CCD unit 20 is completed by the same operation as in the first embodiment, next, the actuator unit 22 is attached to the objective unit 21. That is, first, the holding member 58 is attached to the friction member 6 of the spring unit 57.
0 is fitted, and this (the pressing ring 58 and the spring unit 57) is positioned below the slit 39 of the lens frame 38B of the objective unit 21 (see FIG. 3). Then, before assembling the holding ring 58 to the spring unit 57,
The slit portions 506a and 506b of the holding ring 58
It is deformed in advance so as to narrow the gap between the slits. next,
A unit formed by bonding and fixing the outer pipe 55, the pipe stopper 87, and the guide 56 is inserted through the holding ring 58 and the spring unit 57 while being inserted into the insertion hole 34 of the objective unit 21. Subsequent operations are the same as in the first embodiment.

In this modification, the screw 86 of the spring unit 57 is turned to move the moving unit 59 and the friction member 60.
The operation after adjusting the static friction force between the guide and the guide 56 to an appropriate value is slightly different from that of the first embodiment. That is, when the adjustment is completed, the screw 86 is bonded and fixed to the screw back 85 and the outer pipe 55 so that the screw 86 does not rotate. Further, as shown in FIG. 3, the pressing ring 58 and the belt 83 may be adhered and fixed only on one side with an adhesive 342, and the friction member 60 may be elastically pressed against the moving unit 59. Before adjusting the static frictional force to an appropriate value, the moving body unit 59 may be reciprocated to improve the contact between the sliding pipe 66, the friction member 60, and the guide 56.

Next, the screw 86 of the spring unit 57 is turned to adjust the static friction force between the moving unit 59, the friction member 60 and the guide 56 to an appropriate value. When this adjustment is completed, the screw 86 and the screw back 85 are temporarily stopped so as not to rotate. This anti-rotation agent is applied to a portion 508 shown in FIG. The application range is a range that does not protrude from the thread 85. In this state, the mobile unit 59 is reciprocated to make the contact between the sliding pipe 66, the friction member 60 and the guide 56 smooth. Next, remove the temporarily fixed detent agent,
By turning the screw 86 of the spring unit 57 again, the static friction force between the moving body unit 59, the friction member 60 and the guide 56 is adjusted to an appropriate value. After completing this adjustment, screw 86
The screw 86 and the screw backing 85 are bonded and fixed so that does not rotate. The application range of the adhesive is a portion 509 shown in FIG. 27B and does not protrude from the thread 85. The screw 86 and the outer pipe 55 do not need to be bonded and fixed.

By the above assembling operation, the actuator unit 22 is fixed to the objective unit 21 at two front and rear positions (the pipe stopper 87 and the lid 68).

As described above, according to the present modification, various effects as described below can be obtained.

First, in this modification, the lens frame 38A
The ridge 500 of the sliding contact between the lens frame 38D and
An R-surface processing as shown in FIG. 3A or a chamfering processing as shown in FIG. 33B is performed. Therefore, when the lens frame 38A slides, the chamfered portion does not rub against the lens frame 38D so that the lens frame 38A is not hooked. Therefore, when zooming and moving to a wide angle, smooth zooming can be realized without rattling.

In this modification, a notch 502 indicating the upper part of the CCD 35 is provided in the CCD frame 49 (see FIGS. 27 and 32). Therefore, the notch 502 and the notch (not shown) provided in the aperture 37i (FIG. 28) are combined so that the aperture 37i is
When it is attached to 9, the positional relationship between the CCD 35 and the aperture 37i can be matched. As a result, it is possible to prevent the vignetting that occurs when the diaphragm 37i is rotated and attached (fixed).

In this modified example, as shown in FIGS. 34A and 34B, the belt 83 is provided with holes 503 and 504 through which the caulking pin 84 passes. Hole 5
Reference numeral 03 denotes a long hole, which has a long shape in the moving direction of the mobile unit 59, and a hole 504 is a round hole. Therefore, as shown in (c) and (d) of FIG. 34, even if the assembly of the belt 83 is distorted or inclined, the elongated holes 503 allow the belt 83 to be as shown in (e) and (f) of FIG. It can be adjusted to an appropriate position. In addition, FIG.
When the belt 83 is pushed by the holding ring 58 in the state of (f), the belt 83 is pushed straight. Therefore, the friction member 60
Is prevented from being bent and assembled to the mobile unit 59, and unnecessary interference other than the mobile unit 59 and the sliding portion can be eliminated. Thereby, the mobile unit 59 can slide smoothly, and the repetition resistance is improved.

In this modification, the holding ring 5
8 are projections 9 of the friction member 60, as shown in FIG.
0a. Further, the holding ring 58 is provided with slit portions 506a and 506b on both sides.
When the pressing ring 58 is pressed against the belt 83 in order to narrow the gap between the slit portions 506a and 506b before assembling, the slit portions 506a and 506b are opened and always hit the belt 83 with a spring property. Therefore, since the spring unit 57 is elastically pressed against the outer pipe 55 by the pressing ring 58, even if the fixed state tends to change due to wear of the friction member 60, the spring unit 57 continues to be elastically fixed by the spring property. . Therefore, even when used for a long time, the fixed state does not change, the performance is stabilized, and the durability against repetition is improved.

In this modification, the contact state of the friction member 60 on the outer pipe 55 side is as shown in FIG. 35. Therefore, the friction member 60 is assembled obliquely to the moving unit 59. The sliding portion does not hit one side. Therefore, the repetition resistance is improved. Also,
The wear powder rusts due to humidity and chemicals, and the mobile unit 59
Is not fixed.

That is, in FIG. 35 (a), the friction member 60 is in contact with the outer pipe 55.
The contact portion ridgeline 507 of the friction member 60 is set to be as small as possible. Specifically, it is set to C0.02 or less. Therefore, the friction member 60 does not go under the outer pipe 55, and the friction member 60 and the moving body unit 59 are not assembled obliquely and do not hit one another. In addition, since the contact portion of the outer pipe 55 is subjected to a surface treatment, the friction member 60 and the outer pipe 5
5 is only the material of the friction member 60. Therefore, even if the abrasion powder enters the sliding portion of the moving body unit 59, it is rusted and fixed. Further, since the outer pipe 55 is formed of ceramics, the wear powder generated by rubbing the ceramics does not corrode, and the moving body unit 59 does not adhere.

Further, in FIG. 35B, the friction member 60
Are in contact with the guide 56. Therefore, the friction member 60 comes into contact with the moving body unit 59 at a position closer thereto.
Can no longer be assembled diagonally to the mobile unit 59,
There will be no hit. The guide 56 and the friction member 60
Are made of the same type of material (SUS316), the moving body unit 59 is not fixed by the generated wear powder. Further, since the abutting portion of the guide 56 is subjected to the surface treatment, the moving body unit 59 does not adhere, the generated abrasion powder can be reduced, and the resistance is improved. The surface treatment is performed by the guide 56
Not only on the side but also on the friction member 60 side,
It may be performed on both the friction member 60 and the guide 56.

In FIG. 35 (c), the outer pipe 55 and the guide 56 are integrally formed, and the friction member 60 is in contact with the integrated guide 505. Thereby, the contact portion between the friction member 60 and the guide 505 is further expanded, the friction member 60 is not assembled obliquely, and the friction member 60 does not hit one side. Note that the surface treatment performed in FIG. 35B may be performed.

Further, in this modification, the screw 86 and the screw thread 85 are coated with the detent of the temporary fixing and the adhesive so as not to protrude from the screw thread 85. It hardens with the addition, and the spring property does not change after adjustment. When the adjustment is repeated several times, the possibility that the anti-rotation agent protrudes into the leaf spring 61 increases accordingly.
The detent of the temporary fixing is applied on the opposite side of the caulking pin 84 side of the threading 85, and the leaf spring 61 in that portion does not greatly affect the spring property, so that the adjustment of friction changes by protruding or wiping. Little effect. Once the screw 86 is temporarily fixed, the movable unit 59 is reciprocated to make the guide 56 and the sliding between the printing unit 60 and the movable unit 59 conform to each other. By performing the adjustment, the generation of abrasion powder is small, and the resistance to repetition is improved.

In this modification, since the opening 600 of the tube 94 of the actuator cable unit 92 is located on the opposite side of the support 93, the multi-core composite cable 2
The shield wire 8 does not come into contact with the support 93. Thereby, insulation between the shield wire and the objective unit and the CCD unit is maintained.

According to the technical contents described above, the following various configurations can be obtained. 1. A lens of an objective optical system of an endoscope having an insertion portion inserted into a portion to be inspected, and a moving member provided in the insertion portion and reciprocally moved by rapid deformation of the piezoelectric element. An actuator that moves the moving member, a friction portion that contacts the sliding portion of the moving body and holds the moving body by frictional force, and an urging member that urges the friction portion against the sliding portion of the moving body. Wherein the urging member, the friction portion, and the moving body are formed separately from each other.

[0112] 2. The endoscope according to claim 1, wherein the sliding portion is a part of a pipe constituting a moving body. 3. 2. The endoscope according to claim 1, wherein the friction section has a first friction section and a second friction section. 4. 4. The endoscope according to claim 3, wherein the moving body is sandwiched while being urged by the first friction portion and the second friction portion.

[0113] 5. 4. The endoscope according to claim 3, wherein the first friction portion is an inner surface of the guide pipe. 5A. 6. The endoscope according to claim 5, wherein the guide pipe includes two guide pipes. 5B. 6. The endoscope according to claim 5, wherein the guide pipe comprises an inner pipe and an outer pipe. 5C. 6. The endoscope according to claim 5, wherein the guide pipe is formed integrally. 6. 4. The endoscope according to claim 3, wherein the second friction portion is a friction member. 7. 7. The endoscope according to claim 6, wherein the friction member has a saddle shape. 8. The endoscope according to claim 3, wherein the first friction portion and the second friction portion are urged in a direction perpendicular to an axial direction of the moving body.

9. 2. The endoscope according to claim 1, wherein the moving body is movable in an axial direction of the guide pipe. 10. The biasing member is provided on a leaf spring whose longitudinal direction coincides with the axial direction of the guide pipe, a belt disposed so as to surround the leaf spring, the guide pipe, the moving body and the friction member, and the leaf spring. 4. The endoscope according to claim 3, wherein the endoscope comprises an urging force adjusting screw which is screwed to the female screw portion, and a distal end portion of which is arranged to abut on an outer peripheral portion of the guide pipe.

(11) 11. The endoscope according to claim 10, wherein adjustment screws are respectively provided at substantially both ends in the longitudinal direction of the leaf spring. 12. 12. The endoscope according to claim 11, wherein each of the adjusting screws is screwed such that the first friction portion and the second friction portion are pressed against the moving body from a substantially vertical direction. 13. 12. The endoscope according to claim 11, wherein each of the adjustment screws is screwed in by substantially the same amount. 14． 11. The endoscope according to claim 10, wherein a flat portion is provided at a portion where the tip of the urging force adjusting screw abuts on the outer periphery of the guide pipe.

15. The zoom lens includes a contact portion provided on a lens frame of the zoom lens and a stopper portion provided on the fixed lens frame. The stopper portion is formed in a ring shape, and when rotated, the contact position with the zoom lens changes. Endoscope that features. 16. The endoscope according to claim 15, wherein the actuator is connected and fixed after the contact position is determined. 17． 17. The endoscope according to claim 16, wherein the center of the optical axis of the lens frame on which the zoom lens slides and the center of the guide pipe of the actuator are substantially parallel. 18. An endoscope comprising: a moving body of a rapid deformation actuator; and a friction part in contact with a sliding part of the moving body, wherein at least one of the sliding part and the friction part is subjected to a corrosion-resistant surface treatment.

19. 19. The endoscope according to claim 18, wherein at least one of the sliding portion and the friction portion is made of a corrosion-resistant material. 20. 19. The endoscope according to claim 18, wherein at least one of the sliding portion and the friction portion is subjected to a wear-resistant surface treatment. 21. 19. The endoscope according to claim 18, wherein at least one of the sliding portion and the friction portion is made of a wear-resistant material. 22. 22. The endoscope according to any one of claims 18 to 21, wherein the sliding portion is a part of a pipe constituting a moving body. 23. 23. The endoscope according to any one of paragraphs 18 to 22, wherein the friction portion is biased by the moving body.

24. The endoscope according to any one of paragraphs 18 to 23, wherein the friction portion has a first friction portion and a second friction portion. 25. 25. The endoscope according to claim 24, wherein the moving body is sandwiched while being urged by the first friction portion and the second friction portion. 26. 25. The endoscope according to claim 24, wherein the first friction portion is an inner surface of the guide pipe. 27. 25. The endoscope according to claim 24, wherein the second friction portion is a friction member. 28. Item 18. The moving body is movable in an axial direction of the guide pipe, wherein the moving body is movable in an axial direction of the guide pipe.
The endoscope according to the paragraph.

29. Item 18 or Item 2 wherein the moving range of the moving body of the guide pipe is cut off.
Item 9. The endoscope according to any one of items 8. 30. Item 30. The endoscope according to Item 29, wherein a surface of the cut portion of the guide pipe is treated. 31. 31. The endoscope according to any one of items 18 to 30, wherein a portion where the sliding portion and the friction portion contact each other is made of another material or another surface treatment. 32. 23. The endoscope according to claim 22, wherein the pipe is made of a material having the highest wear resistance. 33. 19. The endoscope according to claim 18, wherein the surface treatment is performed by depositing TiN on a metal base material.

34. The surface treatment is performed using CrN on the metal base material.
19. The endoscope according to claim 18, wherein is vapor-deposited. 35. 19. The endoscope according to claim 18, wherein the surface treatment is plated with Ni-based SiC. 36. 19. The endoscope according to claim 18, wherein the surface treatment is Ni-based PTFE-containing plating. 37. 19. The endoscope according to claim 18, wherein the surface treatment is Ni-based tungsten-containing plating.

38. 35. The endoscope according to paragraph 33 or 34, wherein the base material is any one of stainless steel, a copper alloy, and aluminum. 39. The material is SUS316, SUS317, Ti,
35. The endoscope according to paragraph 33 or 34, wherein the endoscope is one of a Ni alloy. 40. 35. The endoscope according to paragraph 33 or 34, wherein the material is ceramics such as alumina. 41. 35. The endoscope according to paragraph 33 or 34, wherein the material is resin.

42. A moving body of the rapid deformation actuator, and a first friction portion and a second friction portion sandwiching the moving body while being urged by an urging member, wherein the first friction portion and the second friction portion move. An endoscope, which is fixed so as not to move relative to a moving direction of a body. 43. The biasing member surrounds the leaf spring whose longitudinal direction is aligned with the axial direction of the guide pipe having the first friction portion, and surrounds the leaf spring, the guide pipe, the moving body, and the friction member having the second friction portion. And a biasing force adjusting screw screwed into a female screw portion provided on the leaf spring and arranged so that a tip portion thereof comes into contact with an outer peripheral portion of the guide pipe. Item 43. The endoscope according to Item 42.

44. 43. The endoscope according to claim 42, wherein the first friction portion and the second friction portion are fixed by a holding ring so as not to relatively move in a moving direction of the moving body. 44A. 45. The endoscope according to claim 44, wherein a part of the holding ring is elastically deformable on a belt side by a slit provided in the holding ring. 44B. 45. The endoscope according to claim 44, wherein when the first and second friction portions are fixed by the press ring, the press ring elastically fixes the belt simultaneously. 45. 45. The endoscope according to claim 44, wherein a friction member is fitted into the notch of the holding ring. 45A. Item 46. The endoscope according to Item 45, wherein the friction member is in contact with the guide pipe.

45B. Item 46. The endoscope according to Item 45, wherein the friction member contacts the inner pipe.

45C. 46. The endoscope according to claim 45, wherein the friction member abuts the outer pipe.

45D. Item 46. The endoscope according to Item 45, wherein the friction member comes into contact with the integrated guide pipe.

45E. 46. The endoscope according to claim 45, wherein at least a part of the friction member is configured not to enter into the guide pipe.

46. The play in the moving direction of the moving body of the notch portion of the pressing ring and the friction member is set smaller than the moving amount of the moving body per impact.
Item 6. The endoscope according to item 5. 47. The frictional force between the first frictional part, the second frictional part, and the moving body can be adjusted by the urging force adjusting screw so that the first frictional part and the second frictional part do not relatively move in the moving direction of the moving body. 43. The endoscope according to claim 42, wherein the endoscope is fixed by a holding ring.

48. 45. The endoscope according to claim 44, wherein the friction member is movable in a direction substantially perpendicular to the moving direction of the moving body within the cutout portion of the holding ring. 49. The moving body of the rapid deformation actuator, and a friction portion that comes into contact with the sliding portion of the moving body, the longitudinal direction of the leaf spring of the urging member that urges the friction portion against the moving body coincides with the moving direction of the moving body. An endoscope characterized by having been made. 50. 50. The endoscope according to claim 49, wherein the sliding portion is a part of a pipe forming a moving body. 51. 50. The friction unit according to claim 49, wherein the friction unit has a first friction unit and a second friction unit, and the moving body is sandwiched while being urged by the first friction unit and the second friction unit. Endoscope.

52. The endoscope according to claim 51, wherein the first friction portion is an inner surface of the guide pipe. 53. 52. The endoscope according to claim 51, wherein the second friction portion is a friction member. 54. The urging member is provided on a leaf spring whose longitudinal direction coincides with the axial direction of the guide pipe, a belt disposed so as to surround the leaf spring, the guide pipe, the moving body and the friction member, and the leaf spring. 54. The endoscope according to claim 53, comprising an urging force adjusting screw screwed into the female screw portion, the distal end portion of which is disposed so as to contact the outer peripheral portion of the guide pipe.

55. 54. The endoscope according to claim 53, wherein the friction member has a saddle shape. 56. 52. The endoscope according to claim 51, wherein the first friction portion and the second friction portion are urged in a direction perpendicular to an axial direction of the moving body. 57. 50. The endoscope according to claim 49, wherein the movable body is movable in an axial direction of the guide pipe. 58. An endoscope wherein an objective lens and an actuator are connected by a connecting pin. 59. 59. The endoscope according to claim 58, wherein the objective lens has a variable power lens movable in an optical axis direction.

60. 60. The endoscope according to claim 59, wherein the variable magnification lens frame is provided with a handle protruding toward the actuator. 61. The tip of the moving body of the actuator has an insertion hole into which the coupling pin is inserted.
The endoscope according to the paragraph. 62. 62. The endoscope according to claim 61, wherein the insertion-side opening of the fitting hole is opened at a notch of the guide pipe. 63. 62. The endoscope according to claim 61, wherein the insertion-side opening of the insertion hole is completely opened in the cutout portion of the guide pipe.

64. 61. The endoscope according to claim 60, wherein the handle, the moving body, and the connecting pin are fixed with an elastic adhesive. 65. 59. The endoscope according to claim 58, wherein a stopper for removing the coupling pin is provided. 66. The sixth aspect is characterized in that the stopper is a small-diameter hole.
Item 6. The endoscope according to item 5. 67. An endoscope comprising a variable-magnification lens frame provided with an air vent hole. 68. The 67th hole is provided outside the light beam.
The endoscope according to the paragraph. 69. 67. The endoscope according to claim 67, wherein a hole communicating with the hole of the variable power lens frame is provided in the stop.

70. In an endoscope apparatus in which a movable lens is moved by a rapid deformation actuator to perform at least one of zooming, focusing, and zooming, a drive circuit for the actuator is provided in the endoscope. apparatus. 71. 71. The endoscope apparatus according to claim 70, wherein the drive circuit is provided in a connector of the endoscope. 72. 71. The endoscope apparatus according to claim 70, wherein the drive circuit is provided in an operation section of the endoscope.

73. A moving body of the rapid deformation actuator, and a first friction portion and a second friction portion sandwiching the moving body while being urged by an urging member, wherein the first friction portion and the second friction portion move. An endoscope comprising a regulating means for regulating relative movement in a body movement direction. 74. The biasing member surrounds the leaf spring whose longitudinal direction is aligned with the axial direction of the guide pipe having the first friction portion, and surrounds the leaf spring, the guide pipe, the moving body, and the friction member having the second friction portion. And a biasing force adjusting screw which is screwed to a female screw portion provided on the leaf spring and has a distal end portion disposed so as to abut against an outer peripheral portion of the guide pipe. Endoscope.

75. 75. The endoscope according to claim 74, wherein the first friction portion and the second friction portion are fixed by a holding ring so as not to relatively move in a moving direction of the moving body. 76. 76. The endoscope according to claim 75, wherein a friction member is fitted into the notch of the holding ring. 77. The frictional force between the first frictional part, the second frictional part, and the moving body can be adjusted by the urging force adjusting screw so that the first frictional part and the second frictional part do not relatively move in the moving direction of the moving body. Item 75. The endoscope according to Item 75, wherein the endoscope is fixed by a holding ring.

78. 77. The endoscope according to claim 76, wherein the friction member is movable in a direction substantially perpendicular to the moving direction of the moving body within the cutout portion of the holding ring. 79. 78. The endoscope according to claim 75, wherein the relative movement between the guide pipe and the friction member is regulated by pulling the holding ring by the regulating means and pressing the friction member against the guide pipe. 80. 80. The endoscope according to claim 79, wherein the degree of absorption of vibration in the moving direction of the moving body is adjusted by the regulating means. 81. In an endoscope apparatus in which an actuator is mounted on the distal end of an endoscope insertion portion and the actuator drives an optical element and / or a lens frame holding the optical element at the distal end of the endoscope insertion portion to move forward and backward, A first lens frame having a connecting portion that moves in the optical axis direction and is connected to the actuator, a second lens frame having a guide that moves the connecting portion of the first lens frame, and the actuator fixing portion A third lens frame having: a moving direction of the actuator and a moving direction of the first lens frame, and / or an optical axis of the first to third lens frames and a moving direction of the actuator, An endoscope apparatus characterized by being substantially parallel. 82. The endoscope apparatus according to claim 81, wherein the actuator has a moving body that is reciprocated by rapid deformation of a piezoelectric element.

83. 81. An actuator according to claim 81, wherein said actuator is fixed to said third lens frame such that no urging force acts in the optical axis direction of said first to third lens frames.
An endoscope apparatus according to the item. 84. The second lens frame is provided with a second actuator fixing portion, and the actuator is fixed to the second actuator fixing portion such that no urging force acts in the optical axis direction of the first to third lens frames. The endoscope apparatus according to Item 81, wherein the apparatus is characterized in that: 85. The second and third lens frames have fitting portions so as to fit each other, and a surface passing through an optical axis of the third lens frame, a center axis in the advance / retreat direction of the actuator, and light of the first lens frame. The endoscope apparatus according to claim 81, wherein a plane passing through a center of the connecting portion between the axis and the first lens frame substantially coincides with each other.

(Problems of Items 81 to 85) If the movement directions of the actuator and the lens frame are not parallel, the movements of the actuators interfere with each other, and a smooth zoom operation cannot be performed. 2. If an urging force is applied to the actuator fixing portion in a direction parallel to the optical axis, the lens frame is deformed (because a force for spreading the actuator fixing portion acts), and smooth sliding of the lens frame cannot be secured. Therefore, the performance cannot be sufficiently obtained. 3. If the surface formed by the guide portion of the lens frame and the connection portion of the lens frame connected to the actuator does not match the surface formed by the fixed portion of the actuator and the optical axis, the positions of the connection portion of the actuator and the connection portion of the lens frame Do not match, causing interference and preventing smooth operation. In addition, when interference occurs, it is difficult to use the camera if it is caught during zooming or the speed changes depending on the magnification. Further, unnecessary sliding is performed, so that friction powder is generated, friction is accelerated, frictional force is largely changed, and durability is repeatedly deteriorated.

(Effects of Items 81 to 85) Since the direction of movement of the actuator is substantially parallel to the direction of movement of the lens frame, the lens frame is smoothly driven by the actuator without interference by mutual movement. can do. Further, since the actuator is fixed without applying an urging force in the optical axis direction, the lens frame is not deformed, and the lens frame can slide smoothly.

86. A contact member that includes a moving body of the rapid deformation actuator and first and second friction parts that are in contact with the sliding part of the moving body, and that controls the relative movement of the first friction part and the second friction member. An endoscope, wherein a surface treatment is performed on a contact member between the contact member and the first or second friction member.

87. 87. The endoscope according to claim 86, wherein the contact member is a holding ring.

88. 87. The endoscope according to claim 86, wherein the contact member is an outer pipe.

89. 87. The endoscope according to claim 86, wherein the contact member is a guide.

90. The endoscope according to claim 86, wherein the first friction portion is an inner surface of a guide pipe.

91. The endoscope according to claim 86, wherein the second friction portion is a friction member.

92. 87. The endoscope according to claim 86, wherein the sliding portion is a part of a pipe constituting a moving body.

93. CrN, TIN, or PT as the first and / or second friction members and / or the contact members.
The eighth aspect wherein Ni plating with FE penetration is applied.
Item 7. The endoscope according to Item 6.

94. A contact member that includes a moving body of the rapid deformation actuator, and first and second friction portions that are in contact with the sliding portion of the moving body, and that controls relative movement of the first friction portion and the second friction portion; An endoscope, wherein the contact member, the first friction portion and the second friction portion are made of a corrosion-resistant material.

95. 95. The endoscope according to claim 94, wherein the contact member is a holding ring.

96. 95. The endoscope according to claim 94, wherein the contact member is an outer pipe.

97. 95. The endoscope according to claim 94, wherein the contact member is a guide.

98. The endoscope according to claim 94, wherein the first friction portion is an inner surface of a guide pipe.

99. The endoscope according to claim 94, wherein the second friction portion is a friction member.

100. 95. The endoscope according to claim 94, wherein the sliding portion is a part of a pipe constituting a moving body.

101. 95. The endoscope according to claim 94, wherein the contact member is formed of ceramic.

102. 95. The endoscope according to claim 94, wherein the contact portion is formed of the same material as the friction member.

[0158]

As described above, the endoscope according to the present invention has an insertion portion inserted into a site to be inspected, and a moving body provided in the insertion portion and reciprocated by rapid deformation of a piezoelectric element. Having an actuator for moving the lens of the objective optical system of the endoscope by reciprocating movement of the moving body, and holding means for holding the moving body by frictional force,
There is provided an urging means for urging the holding means against the moving body, wherein the urging means, the holding means and the moving body are formed separately from each other. Therefore, it is possible to stably urge the holding means that comes into frictional contact with the moving body of the actuator that moves the optical lens.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an endoscope system including an endoscope according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of the endoscope system of FIG. 1;

FIG. 3 is a cross-sectional view of the endoscope shown in FIG. 1 when the imaging unit is assembled.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a perspective view of a resolution adjusting ring.

FIG. 6 is a cross-sectional view of an objective unit included in the imaging unit of FIG.

FIG. 7 is a sectional view of a CCD unit constituting the imaging unit of FIG. 3;

FIG. 8 is a side view including a partial cross section of an actuator unit constituting the imaging unit of FIG. 3;

FIG. 9 is a cross-sectional view of a moving unit constituting the actuator unit of FIG. 8;

FIG. 10 is a perspective view of a lid attached to the mobile unit.

FIG. 11 is a front view of a lid attached to the mobile unit.

FIG. 12 is a perspective view of a spring unit constituting the actuator unit of FIG. 8;

FIG. 13 is an exploded perspective view of the spring unit of FIG.

FIG. 14 is an exploded perspective view of the actuator unit.

FIG. 15 is a sectional view of a connecting portion between the zoom lens frame and the moving body unit.

FIG. 16 is a perspective view of a connecting portion between the zoom lens frame and the moving body unit.

FIG. 17 is a perspective view of a cable unit.

FIG. 18 is a perspective view showing a state in which the objective unit and the CCD unit are connected.

FIG. 19 is a diagram showing a drive waveform for driving an actuator unit.

FIG. 20 is a circuit diagram of an endoscope system including an endoscope according to a second embodiment of the present invention.

FIG. 21 is a perspective view of an actuator unit of the endoscope of FIG. 20;

FIG. 22 is a side view of the actuator unit of FIG. 21.

FIG. 23 is a cross-sectional view of a main part of a diaphragm unit of the lens frame according to the first embodiment and a modification.

FIG. 24 is a front view of the stop according to the first embodiment.

FIG. 25 is an essential part cross-sectional view of a ridgeline portion of a lens frame according to the first embodiment and a modification.

FIG. 26 is an enlarged cross-sectional view of a break preventing portion provided at an end of the multi-core composite cable.

FIG. 27 is a diagram showing a modification of the first embodiment corresponding to FIG. 3;

FIG. 28 is a diagram showing a modification of the first embodiment corresponding to FIG. 7;

FIG. 29 is a diagram illustrating a modification of the first embodiment corresponding to FIG. 8;

FIG. 30 is a diagram illustrating a modification of the first embodiment corresponding to FIG. 14;

FIG. 31 is a diagram illustrating a modification of the first embodiment corresponding to FIG. 17;

FIG. 32 is a diagram illustrating a modification of the first embodiment corresponding to FIG. 18;

FIG. 33 is a diagram illustrating a modification of the first embodiment corresponding to FIG. 25;

FIG. 34 is a diagram showing in detail a hole shape of a belt through which a caulking pin is passed.

FIG. 35 is a cross-sectional view showing each example of a contact state of the friction member with the outer pipe and the guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Endoscope 11 ... Insert part 22 ... Actuator unit 23 ... Zoom lens 56 ... Guide (holding means) 57 ... Spring unit 59 ... Moving body unit (moving body) 60 ... Friction member (holding means) 61 ... Leaf spring ( Urging means) 62: piezoelectric element 83: belt (urging means) 86: urging force adjusting screw (urging means)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H040 BA05 CA09 CA11 CA12 CA23 DA03 DA14 DA15 DA18 DA21 DA41 GA02 GA11 4C061 AA00 BB00 CC00 DD03 FF40 JJ06 JJ11

Claims (1)

[Claims] 1. An endoscope which has an insertion portion inserted into a site to be inspected, and a movable body provided in the insertion portion and reciprocated by rapid deformation of a piezoelectric element, wherein the movable body reciprocates. An actuator for moving a lens of the objective optical system; holding means for holding the moving body by frictional force; and urging means for urging the holding means against the moving body. An endoscope, wherein the holding means and the moving body are formed separately from each other.