JP2014161646A - Optical device and endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical device, while being down-sized, capable of preventing damage of an electric wire connected to a light adjusting device, facilitating the connection of the electric wire and further securing connection strength of the electric wire.SOLUTION: The optical device includes: the light adjusting device having an objective optical system and a drive unit 57 for driving the objective optical system; a cylindrical first frame 21 in which the light adjusting device is provided, and that has a first convex part 21b having a retraction space for the objective optical system and has a protrusion 21t extending rearward from a base end 21bq of the first convex part 21b; an electric wire 60, the tip end 60s of which is fixed to the protrusion 21t; and a lead wire 61 that is provided in the first frame 21 and electrically connects the tip end 60s of the electric wire 60 to the drive unit 57.

Description

  The present invention relates to an optical apparatus and an endoscope used when observing a subject.

  In recent years, in an observation device such as a portable device, a microscope, and an endoscope, an optical device provided in the observation device is required to be downsized as the observation device is downsized.

  Here, an objective optical system for observing a subject used in the optical apparatus, for example, a diaphragm member for adjusting the amount of light, is usually retracted from the position on the observation optical axis and the observation optical axis by a gear or the like provided in the optical apparatus. Generally, it is configured to be movable between positions. However, this configuration has a problem that it is difficult to reduce the size of the optical device because a gear or the like is used to move the aperture member.

  Therefore, Patent Document 1 discloses a first member in which a diaphragm member overlaps an opening on the observation optical axis of each substrate between two circular substrates that are spaced apart in the optical axis direction and have the same outer diameter. Of a light adjusting device (hereinafter referred to as an actuator) that is fixed to a rotating shaft member that is pivotally supported by two substrates so as to be movable between a position and a second position retracted from the opening. A configuration is disclosed.

  In addition, in the actuator disclosed in Patent Document 1, a drive unit that applies a magnetic force from the coil to the rotating shaft member with the supply of electric power is provided on one substrate, and the rotating shaft member is rotated by the magnetic force. A configuration for rotating the diaphragm member by moving it is disclosed.

  The actuator disclosed in Patent Document 1 uses a magnetic force to move the diaphragm member, so there is no need to use a gear or the like. In addition, the drive unit and the rotating shaft member have a plan view of the actuator from the optical axis direction. In addition, they are provided so as to overlap each substrate, that is, without protruding from the outer shape of each substrate, and the diaphragm member is also moved within the outer shape of each substrate. Thus, since the outer diameter of the actuator can be defined by the outer diameter of each substrate, the actuator can be reduced in size, and further, the optical device can be reduced in size.

JP2012-14092A

  However, in the configuration of the optical apparatus disclosed in Patent Document 1, the movable objective optical system is not a small member such as a diaphragm member, but is a second member such as a lens or a filter. The moved objective optical system protrudes outward from the outer shape of each substrate.

  Therefore, in order to fit the objective optical system located at the second position within the outer shape of each substrate, there has been a problem that the outer diameter of each substrate has to be increased and the actuator becomes larger.

  Therefore, in each substrate, a convex portion that protrudes to the outside of each substrate is provided in a part of the outer periphery of the circular portion of each substrate, and the second position is set in the convex portion so that the circular portion of each substrate is A configuration of an actuator that prevents the objective optical system after moving to the second position from protruding from the outer shape of each substrate without increasing the outer diameter is also conceivable. In addition, when the substrate has the convex portion in this way, the frame body in which the actuator is provided should be formed in a shape having a circular portion and a convex portion as well as the outer shape of each substrate. .

  In addition, since each substrate disclosed in Patent Document 1 is circular, the electrical wiring is connected to secure a connection space to the substrate provided with the electrical wiring drive unit that supplies power to the actuator drive unit. The outer diameter of the substrate must be increased, or electrical wiring must be connected to the substrate in a small connection space. However, if the substrate has a convex portion, it is only necessary to connect the electrical wiring to the convex portion, so that it is not necessary to increase the outer diameter of the circular portion of the substrate. Can be secured.

  Here, since each substrate is normally positioned perpendicular to the optical axis, in order to pull out the electrical wiring connected to the surface perpendicular to the optical axis in the convex portion of the substrate in the optical axis rearward direction. Then, it is unavoidable to bend into an L shape by bending a part of the electric wiring.

  However, if the electrical wiring is bent sharply, the wiring may be broken, or in the case of a pattern wiring such as a flexible substrate, the wiring may be broken from the base material. .

  In order to ensure the water tightness of the actuator, the connecting portion of the electrical wiring to the substrate is usually located in the frame body. However, if the protruding amount of the convex portion of the frame body from the circular outer periphery is small, In this case, the electric wiring must be bent suddenly. Therefore, in order not to bend the electrical wiring abruptly, the amount of protrusion from the circular outer periphery of the convex portion of the frame must be increased, and the actuator, that is, the optical device is increased in size accordingly. When the optical device is provided in the observation device, there is a problem that the arrangement space for other members of the observation device is taken away.

  Furthermore, if the protruding amount of the convex portion on the substrate from the outer periphery of the circular portion is small, the connection space of the electric wiring to the substrate is also reduced, and it is difficult to connect the electric wiring to the substrate. Connection strength will be weak.

  The present invention has been made in view of the above problems and circumstances, and while preventing the electrical wiring connected to the actuator from being reduced in size, it is easy to connect the electrical wiring. An object of the present invention is to provide an optical device and an endoscope that can ensure strength.

  In order to achieve the above object, an optical apparatus according to an aspect of the present invention is an optical apparatus used when observing a subject, and includes an objective optical system and a first optical system in which the objective optical system is positioned on an observation optical axis. A light adjustment device having a drive unit that drives the objective optical system so as to be movable between a position and a second position retracted from the observation optical axis, and the light adjustment device is provided inside, When the objective optical system is retracted to the second position, the objective optical system has a first convex portion having a retract space for the objective optical system, and the optical axis direction of the objective optical system extends from the first convex portion. A cylindrical first frame having a projecting portion extending rearward, and an electrical wiring for supplying driving power for the objective optical system to the light adjusting device, the distal end of the projecting portion being fixed in the optical axis direction And the electrical wiring provided in the first frame It includes a lead wire for electrically connecting the end and the driving unit.

  An endoscope according to one aspect of the present invention includes the optical device according to any one of claims 1 to 13 provided in a distal end in an insertion direction of an insertion portion to be inserted into a subject. Yes.

  According to the present invention, an optical device capable of preventing damage to the electrical wiring connected to the actuator while realizing miniaturization, easily connecting the electrical wiring, and further ensuring the connection strength of the electrical wiring, An endoscope can be provided.

The figure which shows the external appearance of the endoscope which comprises the optical apparatus of 1st Embodiment. 1 is a partial cross-sectional view schematically showing the distal end portion of the insertion portion of the endoscope along the line II-II in FIG. Sectional view of the tip along line III-III in Fig. 2 The perspective view which shows the actuator of FIG. 4 is an exploded perspective view of the actuator of FIG. 2 is an enlarged view of a part of the optical device of FIG. Sectional drawing around the second frame along the line VII-VII in FIG. FIG. 6 is an enlarged perspective view showing the first frame in which the objective lens and the actuator are fixed in FIG. 6 in a state where the electric wiring is fixed to the first frame. The perspective view which expands and shows the 2nd frame of FIG. 9 is a perspective view showing a state in which the second frame of FIG. 9 is engaged and fixed to the first frame of FIG. In the optical device according to the second embodiment, an enlarged perspective view showing a first frame in which an objective lens and an actuator are fixed, in a state where electric wiring is fixed to the first frame. The perspective view which expands and shows the 2nd frame of the optical apparatus of 2nd Embodiment. The perspective view which shows the state which the 2nd frame of FIG. 12 engaged and was fixed to the 1st frame of FIG. FIG. 4 is a front view of the first substrate of the actuator of FIG. 4 along the optical axis direction. The figure which shows the imaging range of the light-receiving part in the image pick-up element of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, an observation apparatus including an optical device will be described using an endoscope as an example.

(First embodiment)
FIG. 1 is a diagram showing an external appearance of an endoscope including the optical device according to the present embodiment, and FIG. 2 is a schematic view of the distal end portion of the insertion portion of the endoscope along the line II-II in FIG. FIG. 3 is a partial cross-sectional view showing the tip portion along the line III-III in FIG.

  As shown in FIG. 1, an endoscope 1 is connected to an insertion portion 2 to be inserted into a subject and a proximal end side in the insertion direction S of the insertion portion 2 (hereinafter simply referred to as a proximal end side). The main part is comprised including the operation part 3 made, the universal cord 8 extended from the operation part 3, and the connector 9 provided at the extension end of the universal code 8. Note that the endoscope 1 is electrically connected to an external device such as a control device or a lighting device via the connector 9.

  The operation section 3 is provided with an up / down bending operation knob 4 for bending a bending section 2w (described later) of the insertion section 2 in the up / down direction and a left / right bending operation knob 6 for bending the bending section 2w in the left / right direction.

  Further, the operation unit 3 is provided with a fixed lever 5 that fixes the rotation position of the up / down bending operation knob 4 and a fixed knob 7 that fixes the rotation position of the left / right bending operation knob 6.

  The insertion portion 2 includes a distal end portion 2s, a bending portion 2w, and a flexible tube portion 2k in order from the distal end side in the insertion direction S (hereinafter simply referred to as the distal end side). It is formed along the long and narrow side.

  The bending portion 2w is bent in four directions, for example, up, down, left, and right by the turning operation of the up / down bending operation knob 4 or the left / right bending operation knob 6, so that an optical device 20 (described later) provided in the distal end portion 2s. The observation direction can be changed, and the insertability of the tip 2s in the subject can be improved. Furthermore, the flexible tube portion 2k is connected to the proximal end side of the bending portion 2w.

  As shown in FIGS. 2 and 3, a distal end hard member 80 is provided in the distal end portion 2 s connected to the distal end side of the bending portion 2 w, and the inside of the subject is observed by the distal end hard member 80. The optical device 20 used at the time is fixed by screws 12 as shown in FIGS. In addition, the member which fixes the optical apparatus 20 is not limited to a screw.

  As shown in FIGS. 2 and 3, the distal end rigid member 80 illuminates the subject inserted through the connector 9, the universal cord 8, the operation unit 3, and the insertion unit 2 in addition to the optical device 20. In the optical device 20, the distal end side of the large-diameter light guide 17 that supplies light and the distal end side of the small-diameter light guide 18, the distal end side of the treatment instrument insertion conduit 16 for inserting and removing the treatment instrument into and from the subject, A fluid supply conduit 15 that supplies fluid to an objective lens 41 (described later) exposed at the distal end surface of the distal end portion 2s, a supply nozzle 15n that is fixed to the distal end, and the like are fixed by known fixing means. Yes.

  As shown in FIG. 2, the optical device 20 includes a cylindrical first frame 21 that is a lens frame in which an objective lens 41 and an actuator 50 are fixed, and a distal end side of the outer periphery of the first frame 21. A cylindrical second frame 22 that is a lens frame in which a part or the whole of the inner periphery is engaged and fixed, and the objective lens 42 is fixed inside, and a base end side of the second frame 22 And a cylindrical third frame 23 having an objective lens 43 and an imaging element 45 having a cover glass 44 attached to the light receiving portion fixed inside. The main part is composed.

  As shown in FIG. 2, the objective lens 41 includes a plurality of objective lenses 41, and the objective lens 41 positioned closest to the distal end side in the insertion direction S is disposed in the first frame 21 so as to be exposed on the distal end surface of the distal end portion 2 s. Are fixed in a first circular portion 21a (see FIG. 6) described later.

  In addition, the objective lens 42 is also composed of a plurality, and a small-diameter portion in a second circular portion 22a (see FIG. 9) described later of the second frame 22 so as to be positioned on the same observation optical axis X as the objective lens 41. 22q (see FIG. 6).

  In the present embodiment, the optical axis direction L of the objective lenses 41 and 42 coincides with the insertion direction S of the insertion portion 2. Therefore, hereinafter, similarly to the insertion direction S, the distal end side and the proximal end side in the optical axis direction L are simply abbreviated as the distal end side and the proximal end side.

  The imaging element 45 to which the objective lens 43 and the cover glass 44 are attached is fixed in the third frame 23 so as to be positioned on the observation optical axis X. In other words, the distal end side of the third frame 23 is on the outer periphery of the proximal end side of the second frame 22 so that the imaging element 45 to which the objective lens 43 and the cover glass 44 are attached is positioned on the observation optical axis X. Engaged and fixed.

  Next, an example of the configuration of the actuator 50 provided in the first frame 21 will be described with reference to FIGS. 4 and 5. 4 is a perspective view showing the actuator of FIG. 2, and FIG. 5 is an exploded perspective view of the actuator of FIG.

  As shown in FIGS. 4 and 5, the actuator 50 includes a first substrate 51, a second substrate 52, a diaphragm member 55 that is an objective optical system, and a drive unit 57. Has been. In the present embodiment, the objective optical system is shown by taking the diaphragm member 55 as an example. However, the objective optical system is not limited to this, and the objective optical system may be a lens, a filter, or the like.

  The first substrate 51 has a circular shape in plan view from the optical axis direction L, and has a plate-like circular portion 51a and a part of the outer periphery of the circular portion 51a in the radial direction K of the first substrate 51. The main part is composed of a plate-like convex part 51b that projects in a part of the direction R (hereinafter referred to as the projecting direction R).

  Further, the first substrate 51 is located closer to the second frame 22 in the optical axis direction L than the second substrate 52 in the first frame 21. The circular portion 51a and the convex portion 51b are formed integrally. Moreover, the thickness in the optical axis direction L of the circular part 51a and the convex part 51b is the same.

  In the circular portion 51a, an optical opening 51k penetrating along the optical axis direction L is formed, and a rotation shaft hole 51m penetrating along the optical axis direction L is formed. The optical aperture 51k is located on the observation optical axis X in the first frame 21.

  In the first frame 21, the second substrate 52 is closer to the distal end side in the optical axis direction L than the first substrate 51. Are spaced apart by the thickness of.

  The second substrate 52 has a circular shape in plan view from the optical axis direction L and has a plate-like circular portion 52a and a plate-like shape protruding in the protruding direction R from a part of the outer periphery of the circular portion 52a. The main part is composed of the convex part 52b.

  The circular portion 52a has the same outer diameter as the circular portion 51a, and the convex portion 52b has the same protruding amount as the convex portion 51b in the protruding direction R.

  That is, the second substrate 52 is formed in the same size and shape as the first substrate 51. The circular portion 52a and the convex portion 52b are integrally formed. Furthermore, the thickness in the optical axis direction L of the circular part 52a and the convex part 52b is the same.

  Further, the second substrate 52 is located closer to the objective lens 41 than the first substrate 51 in the first frame 21.

  In the circular portion 52a, an optical opening 52k penetrating along the optical axis direction L is formed, and a rotating shaft hole 52m penetrating along the optical axis direction L is formed. The optical aperture 52k is located on the observation optical axis X in the first frame 21.

  The optical aperture 52k has the same diameter as the optical aperture 51k, and is formed at the position of the second substrate 52 that overlaps the optical aperture 51k when viewed in plan from the optical axis direction L.

  In addition, a spacer 54 having a substantially L shape in plan view from the optical axis direction L and having a predetermined thickness in the optical axis direction L is provided between the circular portion 51a and the circular portion 52a in the optical axis direction L. Yes. In FIG. 5, the spacer 54 is formed integrally with the circular portion 52a. However, the spacer 54 may be formed separately and may be formed integrally with the circular portion 51a.

  Further, a spacer having a predetermined thickness in the optical axis direction L between the convex portions 51b and 52b in the optical axis direction L and in the vicinity of the protruding ends in the protruding direction R of the convex portions 51b and 52b. 53 is provided.

  The thickness of the spacer 53 in the optical axis direction L is equal to the thickness of the spacer 54 in the optical axis direction L. In FIG. 5, the spacer 53 is formed integrally with the convex portion 52b. However, the spacer 53 may be formed separately or may be formed integrally with the convex portion 51b. .

  The aperture member 55 is provided in the gap between the first substrate 51 and the second substrate 52 in the optical axis direction L formed by the spacers 53 and 54.

  The diaphragm member 55 has a circular shape in plan view from the optical axis direction L and a plate-like circular portion 55a, and a plate-like holding portion 55b protruding in the radial direction K from a part of the outer periphery of the circular portion 55a. The main part is composed of

  The circular portion 55a is formed integrally with the holding portion 55b. Further, the thickness of the circular portion 55a in the optical axis direction L matches the thickness of the holding portion 55b. Further, the circular portion 55 a and the holding portion 55 b are formed in the thickness of the spacers 53 and 54 or less in the optical axis direction L.

  The circular portion 55a is formed with a diaphragm opening 55k penetrating along the optical axis direction L. The holding portion 55b is also formed with a through hole 55m penetrating along the optical axis direction L. The through hole 55m has magnetism and has an elongated cylindrical rotation shaft along the optical axis direction L. The member 56 is inserted and fixed along the optical axis direction L. The rotating shaft member 56 may be formed integrally with the holding portion 55b.

  One end of the rotation shaft member 56 penetrates the rotation shaft hole 51m of the first substrate 51 and is rotatable with respect to the rotation shaft hole 51m. The second substrate 52 passes through the rotation shaft hole 52m and is rotatable to the rotation shaft hole 52m.

  As a result, the rotation shaft member 56 is pivotally supported by the first substrate 51 and the second substrate 52, so that the throttle member 55 is also connected to the first substrate 51 via the rotation shaft member 56. The substrate 51 and the second substrate 52 are pivotally supported. That is, the diaphragm member 55 rotates around the rotation shaft member 56.

  Specifically, as the diaphragm member 55 rotates, the diaphragm opening 55k is positioned on the observation optical axis X, specifically, the first position where the diaphragm opening 55k overlaps the optical openings 51k and 52k; The aperture member 55 itself is retracted from the observation optical axis X. Specifically, the aperture member 55 itself is movable between a second position where it is retracted from the optical openings 51k and 52k.

  The first position is defined by the circular portion 55 a contacting the side wall 54 w of the spacer 54, and the second position is defined by the circular portion 55 a contacting the side wall 53 w of the spacer 53.

  In addition, the diaphragm member 55 does not protrude from the outer shapes of the first substrate 51 and the second substrate 52 with the rotation between the first position and the second position. That is, in the first position, the diaphragm member 55 is positioned so as to overlap with the circular part 51a and the circular part 52a, respectively, and in the second position, the diaphragm member 55 is respectively arranged with the circular part 51a, the circular part 52a, and the convex part. It overlaps with the convex part 51b and the convex part 52b.

  The drive unit 57 is fixed to the circular part 51 a of the first substrate 51. The drive unit 57 has a substantially U-shaped yoke member 57y in a plan view from the optical axis direction L, and a wound coil that is a magnetic generation unit wound around each arm portion facing the yoke member 57y. The main part is comprised including the part 57c.

  Further, the drive unit 57 is fixed at a position in the circular portion 51a so as to avoid the optical opening 51k, and the tip of each winding coil portion 57c is viewed in plan view from the optical axis direction L as shown in FIG. In this state, the rotary shaft member 56 that protrudes through the rotary shaft hole 51m is sandwiched.

  The drive unit 57 drives the diaphragm member 55 so as to be movable between the first position and the second position.

  Specifically, when the driving power is supplied to each of the winding coil portions 57c, specifically, when a predetermined current is applied, the driving portion 57 generates magnetism to generate magnetism, thereby turning the rotating shaft. The member 56 is rotated.

  As a result, the diaphragm member 55 fixed to the rotation shaft member 56 rotates between the first position and the second position by switching the magnetic field by each winding coil portion 57c.

  Next, the external shape of the first frame 21 in which the objective lens 41 and the actuator 50 are fixed inside, the external shape of the second frame 22 in which the objective lens 42 is fixed inside, the first frame 21 and the second frame The state of engagement with the frame 22 and the configuration for fixing the electrical wiring to the first frame 21 will be described with reference to FIGS.

  6 is an enlarged view of a part of the optical device shown in FIG. 2 and only the lower half is shown in cross section. FIG. 7 is a cross-sectional view around the second frame taken along line VII-VII in FIG. FIG. 7 is an enlarged perspective view showing a first frame in which an objective lens and an actuator are fixed in FIG. 6 in a state where electric wiring is fixed to the first frame.

  9 is an enlarged perspective view showing the second frame in FIG. 6, and FIG. 10 shows a state in which the second frame in FIG. 9 is engaged and fixed to the first frame in FIG. It is a perspective view which shows an electrical wiring upward.

  As shown in FIG. 6, the optical device 20 is covered with a cover member 128, and a space between the cover member 128 and the optical device 20 is filled with an adhesive 66.

  As shown in FIGS. 6 and 8, the cylindrical first frame 21 includes a first circular portion 21a having a circular shape in plan view from the optical axis direction L, and the first circular portion 21a. The shape projected in the projection direction R from a part of the outer periphery, and the shape viewed in plan from the optical axis direction has a U-shaped first convex portion 21b, so that the shape viewed in plan from the optical axis direction L Is formed with a keyhole shape formed by combining a substantially circular portion and a rectangular portion.

  More specifically, the outer shape of the first frame 21 and the shape of the inner peripheral surface are formed substantially the same as the outer shape of the actuator 50, that is, the outer shapes of the first substrate 51 and the second substrate 52. The outer peripheral surface of the actuator 50 is fixed to the inner peripheral surface of the first frame 21.

  Therefore, the inside of the first circular portion 21a of the first frame 21 forms a space in which the circular portion 51a of the first substrate 51 and the circular portion 52a of the second substrate 52 of the actuator 50 are fixed. .

  Further, the inside of the first convex portion 21 b forms a space in which the convex portion 51 b of the first substrate 51 and the convex portion 52 b of the second substrate 52 of the actuator 50 are fixed. Therefore, the inside of the first convex portion 21b constitutes a retracting space H for the aperture member 55 when the aperture member 55 is retracted to the second position.

  Further, as shown in FIG. 8, the drive unit 57 of the actuator 50 provided inside the first frame 21 is a base end in the optical axis direction L of the first frame 21 (hereinafter simply referred to as a base end). It is exposed through the opening 21k.

  The opening 21k includes an opening 21ak at the base end 21aq of the first circular portion 21a and an opening 21bk at the base end 21bq of the first convex portion 21b. The opening 21bk communicates with the opening 21ak.

  As shown in FIGS. 6 and 8, at the base end 21 bq of the first convex portion 21 b of the first frame 21, the bottom of the protruding end in the protruding direction R extends from the bottom to the rear in the optical axis direction L. A protruding portion 21t formed of a flat plate-like member extending to the rear (hereinafter simply referred to as “rear”) is formed in a tongue shape.

  In addition, if the formation position of the protrusion part 21t is the base end 21bq of the 1st convex-shaped part 21b, it will not be limited to a bottom part, For example, either base end of the side wall which the 1st convex-shaped part 21b opposes It may be extended backward from 21bq.

  The protruding portion 21t has a front end (hereinafter, simply referred to as a front end) 60s in the optical axis direction L of the electrical wiring 60 that supplies the actuator 50 with driving power for the diaphragm member 55 on the surface 21ta (see FIG. 6) on the drive portion 57 side. Constitutes a part to be fixed by adhesion or the like. The tip 60s is fixed not only to the surface 21ta of the protruding portion 21t but also to the inner surface of the bottom portion of the first convex portion 21b.

  The electrical wiring 60 is composed of a flexible substrate on which a plurality of signal wirings and a power supply wiring for driving the actuator 50 are formed. The electrical wiring 60 is electrically connected to the distal end of the other wiring inserted through the insertion portion 2, the operation portion 3, the universal cord 8, and the connector 9 in the insertion portion 2 at the base end. The connector 9 is electrically connected to a substrate (not shown).

  Further, as shown in FIG. 8, one end of the lead wire 61 is formed on the pattern 60p formed on the surface 60sa on the driving portion 57 side at the tip 60s of the electric wiring 60 and positioned inside the first convex portion 21b. Are electrically connected.

  Note that the other end of the lead wire 61 is electrically connected to the drive unit 57. In addition, the lead wire 61, the connection portion between the one end of the lead wire 61 and the pattern 60 p, and the connection portion between the other end of the lead wire 61 and the drive portion 57 are located in the first frame 21.

  As shown in FIGS. 6, 7, and 9, the cylindrical second frame 22 has a large diameter portion 22p and a small diameter portion 22q that block the opening 21ak of the base end 21aq of the first circular portion 21a. The second circular portion 22a and a part of the outer periphery of the large-diameter portion 22p of the second circular portion 22a protrude along the protruding direction R, and the distal end 22bs contacts the base end 21bq of the first convex portion 21b. The shape in plan view from the optical axis direction L having the second convex portion 22b that closes the opening 21bk of the base end 21bq is formed in a key shape by contact.

  Of the second circular portion 22a, the large-diameter portion 22p is formed in the front half of the optical axis direction L as shown in FIG. 6, and the first circular portion 21a of the first frame 21 has the first circular portion 21a. It is engaged with the outer periphery. The small diameter portion 22q is formed in the latter half portion in the optical axis direction L. The small-diameter portion 22q is engaged with the distal end side of the third frame 23, and the objective lens 42 is fixed inside.

  A notch formed by notching a part of the bottom part and penetrating the second convex part 22b in the optical axis direction L at the bottom part which is the projecting end of the projecting direction R of the second convex part 22b. A space I of 22 bi is formed. As shown in FIGS. 6 and 10, the space I is for pulling out the electrical wiring 60 whose tip 60 s is fixed to the protruding portion 21 t to the rear of the second frame 22.

  Further, by forming the notches 22bi, arm portions 22bw facing each other are formed on the protruding end side in the protruding direction R of the second convex portion 21b.

  Each arm portion 22bw has a protruding end in the protruding direction R in contact with the cover member 128 as shown in FIG. 7, and both side surfaces 21tg of the protruding portion 21t are attached to each inner surface on the protruding end side via an adhesive 65. Are fixed by bonding. That is, the protruding portion 21t is fixed to the inner surface of each arm portion 22bw while being sandwiched between the arm portions 22bw. Therefore, the interval between the arm portions 22 bw is formed to be greater than the width of the protruding portion 21 t, that is, the width of the electric wiring 60.

  Further, each arm portion 22bw constitutes a restricting portion that restricts the movement of the electric wiring 60 in the space I.

  Furthermore, as shown in FIGS. 6 and 7, the space I is filled with an adhesive 65 as a filling material together with the electric wiring 60.

  As shown in FIGS. 6 and 10, the second frame 22 seals the actuator 50 in the first frame 21 in a watertight manner by closing the opening 21 k at the base end of the first frame 21. It is.

  Specifically, as shown in FIG. 10, the large-diameter portion 22p of the second circular portion 22a of the second frame 22 is attached to the outer periphery of the first circular portion 21a of the first frame 21 by an adhesive or the like. The distal end 22bs of the second convex portion 22b is fixed to the base end 21bq of the first convex portion 21b with an adhesive or the like, and on the inner surfaces of both arms 22bw of the second convex portion 22b, Since both side surfaces 21tg of the projecting portion 21t are fixed by the adhesive 65 or the like, and the space I is filled and closed by the adhesive 65 together with the electric wiring 60, the second frame 22 is the first frame. The actuator 50 is sealed in the first frame 21 in a water-tight manner by closing the opening 21 k at the base end of 21. This prevents moisture from the adhesive 66 in the cover member 128 and the outside of the optical device 20 from entering the first frame 21.

  Thus, in the present embodiment, the front end 60s of the electric wiring 60 is a surface of the flat plate-like protruding portion 21t extending backward from the base end 21bq of the first convex portion 21b of the first frame 21. It was shown to be fixed at 21 ta.

  Here, as described above, when the tip 60 s of the electrical wiring 60 is fixed to the first substrate 51 of the actuator 50 provided in the first frame 21 as in the related art, as described above, the electrical wiring In order to pull out 60 backward, it is necessary to bend the electric wiring 60 abruptly into an L shape by curving a part of the electric wiring 60, and the wiring pattern on the electric wiring 60 may be damaged. Further, in order not to bend a part of the electric wiring 60 abruptly, that is, to bend gently, the convex portion 51b of the first substrate 51, that is, the first convex portion 21b and the second convex portion. The protrusion amount of 22b must be increased in the protrusion direction R. When the protrusion amount increases, as shown in FIG. 3, for example, the treatment instrument insertion conduit 16 and the light guide 17 are arranged in the distal end hard member 28. There is a problem of taking away space. Furthermore, since the connection space of the tip 60s of the electric wiring 60 to the first substrate 51 is very small, there is a problem that the connection work is difficult and the connection strength is weakened.

  However, as described above, according to the present embodiment, the tip 60s of the electric wiring 60 is connected and fixed without being bent to the surface 21ta of the flat projection 21t that becomes a dedicated fixing space. Since connection to a large connection space on the flat surface 21ta is possible, connection strength can be improved and connection work is facilitated. In addition, since the protruding portion 21t or the space I can be used as a mark when the tip 60s is connected, the connection work is facilitated.

  Further, since the front end 60s of the electric wiring 60 is connected and fixed to the flat surface 21ta of the flat projection 21t without being bent, the front end 60s of the electric wiring 60 is pulled out when the electric wiring 60 is pulled backward. Since it is not necessary to bend the side into an L shape, the electric wiring 60 can be prevented from being damaged.

  Furthermore, since the flat protrusion 21t extends rearward from the base end 21bq of the first protrusion 21b, the optical device 20 becomes larger in the protrusion direction R due to the protrusion 21t. There is no.

  Furthermore, the protruding amount in the protruding direction R of the convex portions 51b and 52b of the first substrate 51 and the second substrate 52, that is, the first convex portion 21b and the second frame of the first frame 21. Since the protrusion amount in the protrusion direction R of the second convex portion 22b of 22 only needs to secure a minimum protrusion amount by which the throttle member 55 can move to the second position, the convex portion 51b, 52b, that is, the amount of protrusion of the first convex portion 21b and the second convex portion 22b in the protruding direction R can be set to a minimum, so that the optical device 20 can be miniaturized. The apparatus 20 can be arranged in a space-saving manner without taking up the arrangement space for other members.

  Further, since the electrical wiring 60 after the connection of the tip 60s can be formed by the adhesives 65 and 66, when the optical device 20 is provided in the tip 2s, the assembly failure caused by the interference of the electrical wiring 60s with other members. Can be prevented.

  Further, in the present embodiment, it is shown that the space I for drawing out the electrical wiring 60 rearward from the second frame 22 is formed in the second convex portion 22 b of the second frame 22.

  According to this, since it is not necessary for the electric wiring 60 to pass outside in the protruding direction R from the protruding end of the second convex portion 22b, the optical device 20 can be reduced in size accordingly. Can do.

  Furthermore, in the present embodiment, the large diameter portion 22p of the second circular portion 22a of the second frame 22 is fixed to the outer periphery of the first circular portion 21a of the first frame 21 with an adhesive or the like, The distal end 22bs of the second convex portion 22b is fixed to the base end 21bq of the first convex portion 21b with an adhesive or the like, and the projecting portion 21t is formed on the inner surface of both arms 22bw of the second convex portion 22b. 21tg of the second frame 22 is fixed by the adhesive 65 or the like, and the space I is filled with the adhesive 65 together with the electric wiring 60 and is closed, so that the second frame 22 is the base of the first frame 21. It has been shown that the actuator 50 is sealed in a watertight manner in the first frame 21 by closing the end opening 21k.

  Here, conventionally, in the case where the first frame 21 and the second frame 22 are formed only from a circular portion, the second frame 22 is engaged and fixed to the first frame 21, and then the first frame The optical device 20 had a watertight structure with respect to the inside of the first frame 21 by covering the outer periphery of the frame 21 and the second frame 22 with a heat shrinkable tube or the like.

  However, in this structure, as shown in the present embodiment, the first frame 21 is formed in a shape having a step between the first circular portion 21a and the first convex portion 21b. When the frame 22 is formed in a shape having a step between the large-diameter portion 22p of the second circular portion 22a and the second convex portion 22b, the step is formed on the outer periphery of each of the frames 21, 22. On the other hand, the heat-shrinkable tube is difficult to adhere, and as a result, it is difficult to ensure watertightness, and it is difficult to pull out the electrical wiring 60 backward while ensuring watertightness.

  Therefore, according to the configuration of the present embodiment described above, the first circular portion 21 a, the first convex portion 21 b, the protruding portion 21 t of the first frame 21, and the second circular shape of the second frame 22. In addition to bonding and fixing the large-diameter portion 22p and the second convex portion 22b of the portion 22a, with a simple configuration using only the adhesive 65 filled in the space I, the water tightness in the first frame 21 is increased. The electrical wiring 60 can be pulled out backward while ensuring.

  As described above, the optical device 20 that can prevent the electrical wiring 60 connected to the actuator 50 from being damaged while realizing miniaturization, can easily connect the electrical wiring 60, and can secure the connection strength of the electrical wiring 60, The endoscope 1 can be provided.

(Second Embodiment)
FIG. 11 is an enlarged perspective view showing the first frame in which the objective lens and the actuator are fixed in the optical apparatus according to the present embodiment in a state in which the electric wiring is fixed to the first frame. FIG. 13 is an enlarged perspective view showing a second frame of the optical device according to the present embodiment, and FIG. 13 shows a state in which the second frame in FIG. 12 is engaged and fixed to the first frame in FIG. FIG. 3 is a perspective view showing the electrical wiring on the upper side.

  The configuration of the optical device according to the second embodiment is different from that of the optical device according to the first embodiment shown in FIGS. A difference is that a space is formed between the projecting portion of the frame and the second convex portion of the second frame to draw the electrical wiring backward.

  Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  In the present embodiment, as shown in FIG. 11, the protruding portion 21t extending rearward from the base end 21bq of the first convex portion 21b of the first frame 21 is formed on the first convex portion 21b. It is formed so as to extend from the three consecutive sides, that is, the bottom and each side wall while maintaining a U-shape rearward. Accordingly, the protruding portion 21t is configured to include a bottom portion 21tn and side walls 21tw that are continuous with the bottom portion 21tn and face each other.

  The protruding portion 21t constitutes a portion where the tip 60s of the electric wiring 60 is fixed to the surface 21ta on the drive portion 57 side of the bottom portion 21tn by adhesion or the like. The tip 60s is fixed not only to the surface 21ta of the protruding portion 21t but also to the inner surface of the bottom portion of the first convex portion 21b.

  Also in the present embodiment, one end of the lead wire 61 is formed on the pattern 60p formed on the surface 60sa on the drive unit 57 side at the tip 60s of the electrical wiring 60 and positioned inside the first convex portion 21b. Electrically connected.

  Note that the other end of the lead wire 61 is electrically connected to the drive unit 57. In addition, the lead wire 61, the connection portion between the one end of the lead wire 61 and the pattern 60 p, and the connection portion between the other end of the lead wire 61 and the drive portion 57 are located in the first frame 21.

  Also, as shown in FIG. 12, the second frame 22 includes a second circular portion 22a having a large diameter portion 22p and a small diameter portion 22q that close the opening 21ak of the base end 21aq of the first circular portion 21a, and the second circular portion 22a. The second circular portion 22a protrudes from a part of the outer periphery of the large-diameter portion 22p along the protruding direction R, and both side portions 22bg are bonded and fixed to the inner surface of each side wall 21tw in the U-shaped protruding portion 21t. As a result, the shape in plan view from the optical axis direction L having the second convex portion 22b that closes the opening 21bk of the base end 21bq is formed in a key shape. The large-diameter portion 22p of the second circular portion 22a is engaged with the outer periphery of the first circular portion 21a of the first frame 21.

  Further, as shown in FIG. 13, a bottom 22bn serving as a projecting end in the projecting direction R of the second convex portion 22b fixed to the inner surface of each side wall 21tw in the projecting portion 21t, and a bottom 21tn of the projecting portion 21t. A space J is formed between the inner surface of the second frame 22 and the electrical wiring 60 having the tip 60s fixed to the protruding portion 21t.

  Each side wall 21tw of the protruding portion 21t constitutes a restricting portion that restricts the movement of the electric wiring 60 in the space J. Therefore, the interval between the side walls 21tw is formed to be greater than the width of the second convex portion 22b and the electric wiring 60.

  Furthermore, although not shown, the space J is filled with an adhesive 65 as a filling material together with the electric wiring 60.

  Similar to the first embodiment, the second frame 22 seals the actuator 50 in the first frame 21 in a watertight manner by closing the opening 21k at the base end of the first frame 21. is there.

  Specifically, as shown in FIG. 13, the large-diameter portion 22p of the second circular portion 22a of the second frame 22 is attached to the outer periphery of the first circular portion 21a of the first frame 21 by an adhesive or the like. The both side portions 22bg of the second convex portion 22b are fixed to the inner surface of each side wall 21tw in the protruding portion 21t, and the space J is filled with the adhesive 65 together with the electric wiring 60 and closed. As a result, the second frame 22 seals the actuator 50 in the first frame 21 in a watertight manner by closing the opening 21 k at the base end of the first frame 21. This prevents moisture from the adhesive 66 in the cover member 128 and the outside of the optical device 20 from entering the first frame 21. Other configurations are the same as those of the present embodiment described above.

  Even with such a configuration, the same effects as those of the first embodiment described above can be obtained.

  Hereinafter, modifications will be described. In the first and second embodiments described above, the first frame 21 is a lens frame in which the objective lens 41 is fixed, and the second frame 22 is a lens frame in which the objective lens 42 is fixed. Although shown, not only this but the structure by which the objective lens is provided only in any one frame may be sufficient.

  In the first and second embodiments described above, the actuator 50 generates magnetism by applying magnetism when a predetermined current is applied to each winding coil portion 57c of the drive portion 57. Although it has been shown that the throttle member 55 is rotated between the first position and the second position by rotating the moving shaft member 56, the configuration for rotating the rotating shaft member 56 is shown in FIG. Of course, the configuration is not limited to that shown in FIG.

  Furthermore, in the first and second embodiments described above, the objective optical system has been described by taking the diaphragm member 55 as an example. However, the present invention is not limited thereto, and as described above, a lens or a filter may be used. Of course, the larger the objective optical system is, the larger the amount of protrusion of the optical device 20 in the protrusion direction R, so the effect of downsizing the optical device 20 using the configuration of the first and second embodiments is obtained. growing.

  In the first and second embodiments described above, the observation apparatus provided with the optical device 20 has been illustrated by taking a flexible mirror having the bending portion 2w and the flexible tube portion 2k as an example. Needless to say, the present invention can be applied to a rigid endoscope, and may be a microscope or a portable device.

  By the way, in the first and second embodiments described above, in the first frame 21, the actuator 50 includes the first substrate 51 positioned on the second frame 22 side, and the second substrate 52 is the objective. Although it is shown that the first substrate 51 is provided on the lens 41 side, the first substrate 51 is provided on the objective lens 41 side, and the second substrate 52 is provided on the second frame 22 side. There is also.

  Furthermore, the optical aperture 51k of the first substrate 51 and the optical aperture 52k of the second substrate 52 may also function as a diaphragm member that narrows the light beam incident on the image sensor 45.

  In these cases, the light flux incident on the optical aperture 51k is blocked by each winding coil portion 57c, and each winding coil portion 57c is reflected on the light receiving portion of the image sensor 45 to form an image in the subject. In some cases, the target viewing angle cannot be obtained. That is, the imaging range on the light receiving portion of the image sensor 45 necessary for forming an image in the subject may be narrowed.

  Therefore, in order to obtain a necessary imaging range, it is necessary to widen the interval between the winding coil portions 57c. As a result, there is a problem that the actuator 50, that is, the optical device 20 becomes large.

  Hereinafter, the configuration of an optical apparatus that solves such a problem will be described with reference to FIGS. FIG. 14 is a front view of the first substrate of the actuator of FIG. 4 along the optical axis direction, and FIG. 15 is a diagram illustrating the imaging range of the light receiving unit in the image sensor of FIG.

  As shown in FIG. 14, when the drive unit 57 is provided on the first substrate 51, the center 51kc of the optical opening 51k of the first substrate 51 and a line that minimizes the distance from the center to the winding coil unit 57c. And the plane passing through the line segment a is the A plane. Also, as shown in FIG. 15, in the light receiving unit 45j of the image sensor 45, the point through which the observation optical axis X of the objective lens passes, and the light receiving unit A line segment having the minimum distance to the imaging range 45h of 45j is defined as b, and a plane passing through the line segment b is defined as a B plane.

  Then, when the orientation of the image sensor 45 and the orientation of the actuator 50 are matched so that the A surface and the B surface are parallel, the line segment a is blocked by the light beam incident from the optical aperture 51k, and the light beam is the most. Since the line segment b is positioned along the direction in which the viewing angle is the smallest, the winding coil unit 57c is prevented from being reflected on the light receiving unit 45j. it can.

  As a result, the distance between the winding coil portions 57c for ensuring the necessary viewing angle can be set to the minimum necessary distance.

  In addition, since the drive unit 57 mounted on the first substrate 51 can be provided as close as possible to the optical aperture 51k, the optical device 20 can be reduced in size while ensuring a visual field range necessary for an image in the subject. Can be

  Note that the above is not limited to the drive unit 57, and the same applies to other members mounted on the first substrate 51.

DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Insertion part 20 ... Optical apparatus 21 ... 1st frame 21a ... 1st circular part 21ak ... Opening of the base end of 1st circular part 21aq ... Base end of 1st circular part 21b ... First convex portion 21bk ... Opening at the base end of the first convex portion 21bq ... Base end of the first convex portion 21k ... Opening at the base end of the first frame 21t ... Projecting portion of the first frame 21tw ... side wall (regulator)
22 ... 2nd frame 22a ... 2nd circular part 22p ... Large diameter part (part) of 2nd circular part
22b ... 2nd convex-shaped part 22bw ... Arm part (regulation part)
DESCRIPTION OF SYMBOLS 23 ... 3rd frame 41 ... Objective lens 42 ... Objective lens 45 ... Image pick-up element 50 ... Actuator (light adjustment apparatus)
55. Diaphragm member (objective optical system)
57 ... Driver 57c ... Wind coil (magnetic generator)
60 ... Electrical wiring 60s ... Electric wiring tip 61 ... Lead wire 65 ... Adhesive (filler)
H: Retraction space I ... Space J ... Space L ... Optical axis direction S ... Insertion direction X ... Observation optical axis

Claims (17)

An optical device used when observing a subject,
The objective optical system and the objective optical system are driven so as to be movable between a first position where the objective optical system is located on the observation optical axis and a second position where the objective optical system is retracted from the observation optical axis. A light adjusting device having a drive unit;
When the light adjusting device is provided inside and the objective optical system is retracted to the second position, the light adjusting device includes a first convex portion having a retract space for the objective optical system, and the first convex portion A cylindrical first frame having a projecting portion extending rearward in the optical axis direction of the objective optical system;
An electrical wiring for supplying driving power of the objective optical system to the light adjusting device, the tip of the optical axis direction being fixed to the protrusion,
A lead wire provided in the first frame for electrically connecting the tip of the electrical wiring and the drive unit;
An optical device comprising:   The first frame protrudes from a first circular portion and a part of the outer periphery of the first circular portion, and the first convex shape having a U-shape when viewed in plan from the optical axis direction. The optical device according to claim 1, wherein the shape of the optical device in plan view from the optical axis direction has a keyhole shape combining a circular portion and a rectangular portion. A second seal that watertightly seals the light adjusting device in the first frame by being at least partially engaged with the outer periphery of the base end side in the optical axis direction of the first frame. Further comprising a frame,
The second frame is engaged with the outer periphery of the first circular portion and has a second circular portion that closes the opening of the proximal end of the first circular portion in the optical axis direction, and the second circular portion The shape of the circular portion when viewed in plan from the optical axis direction has a second convex portion that protrudes from a part of the outer periphery of the circular portion and blocks the opening at the proximal end of the first convex portion in the optical axis direction. The optical device according to claim 2, wherein the optical device is formed in a keyhole shape combined with a rectangular portion.   The said protrusion part is comprised from the flat member extended to the back of the said optical axis direction from the base end of the said optical axis direction of the said 1st convex-shaped part, The Claim 3 characterized by the above-mentioned. Optical device.   The optical device according to claim 4, wherein a space for drawing out the electrical wiring to the rear of the second frame in the optical axis direction is formed in the second convex portion.   The optical device according to claim 5, wherein the second convex portion is provided with a restricting portion that restricts movement of the electric wiring in the space.   The optical device according to claim 5 or 6, wherein a filling material is filled in the space together with the electric wiring.   4. The projecting portion extends in a U-shape from the three consecutive sides of the base end in the optical axis direction of the first convex portion to the rear of the rear of the optical axis. An optical device according to 1.   9. A space is formed between the second convex portion and the projecting portion to draw the electrical wiring to the rear of the second frame in the optical axis direction. Optical device.   The optical device according to claim 9, wherein the projecting portion is provided with a restricting portion that restricts movement of the electric wiring in the space.   The optical device according to claim 9 or 10, wherein a filling material is filled in the space together with the electrical wiring.   At least one of the first frame and the second frame is a lens frame in which an objective lens is provided on the observation optical axis for observing the inside of a subject together with the objective optical system. Item 12. The optical device according to any one of Items 3 to 11. A third frame provided with an image sensor inside is engaged with the outer periphery of the second frame on the base end side in the optical axis direction,
The optical according to any one of claims 3 to 12, wherein the third frame is engaged with the second frame so that the imaging device is positioned on the observation optical axis. apparatus.   The optical device according to claim 1, wherein the electrical wiring is a flexible substrate on which a plurality of signal wirings and a power supply wiring for driving the light adjusting device are formed. The driving unit includes a magnetism generating unit that generates magnetism by supplying driving power from the electrical wiring,
15. The objective optical system according to claim 1, wherein the objective optical system moves between the first position and the second position when a magnetic field is switched by the magnetism generator. The optical device described. The objective optical system is pivotally supported in the light adjusting device so as to be rotatable,
The optical apparatus according to claim 1, wherein the objective optical system moves between the first position and the second position with rotation.   The endoscope according to any one of claims 1 to 16, wherein the optical device is provided in a distal end in an insertion direction of an insertion portion to be inserted into a subject.

Images