JP2009139764A - Zoom microscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a zoom microscope which is capable of changing a zoom magnification manually or electrically and excellent in working operability. <P>SOLUTION: The zoom microscope 100 includes: a main body frame 20 whose inside has a zoom optical system including zoom lens groups 22 and 23 held by lens holding frames 25 and 26 freely movable in the direction of an optical axis L1 and fixedly held zoom lens groups 21 and 24; a cam shaft 27 and pulleys 28 and 29 moving the zoom lens groups 22 and 23 in the direction of the optical axis L1 through the lens holding frames 25 and 26, to change the zoom magnification; zoom handles 12a and 12b; a motor-driven zoom unit 13 freely removably inserted into the main body frame 20, to drive a zoom handle shaft 31 electrically; and gears 35, 36 and 38 connecting the motor-driven zoom unit 13 and the zoom handle shaft 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a zoom microscope that changes the zoom magnification by moving the position of a zoom lens in a zoom lens body manually or electrically.

  Conventionally, zoom microscopes capable of continuously changing the magnification have been developed. The zoom microscope continuously changes the magnification by moving an optical member such as a lens in the optical axis direction of the microscope. An example of a zoom microscope is a stereomicroscope. A stereomicroscope can be used to observe a specimen three-dimensionally, and is often used for anatomy of a living body, assembly of semiconductor substrate parts, and the like in addition to observation of a specimen.

  Conventional zoom microscopes include a manual type that changes the magnification manually, an electric type that changes the magnification using a drive source such as an electric motor, and a combination type that can change the magnification either manually or electrically. (See Patent Documents 1 and 2). The manual type zoom microscope includes a zoom handle that can be manually rotated on a side surface of a zoom lens body that holds a zoom lens. In the manual type zoom microscope, the zoom magnification changes according to the rotation direction and the rotation amount of the zoom handle. The combined type zoom microscope includes a zoom handle on a side surface of a zoom lens body, a stepping motor, and a foot switch or a hand switch electrically connected to the stepping motor. In the combined type zoom microscope, the zoom magnification changes according to the rotation direction and amount of the zoom handle or the operation of the foot switch or the hand switch.

JP 2004-226882 A JP 2007-25389 A

  In the conventional combined type zoom microscope, a stepping motor is provided on the outer surface of the zoom lens body, so that the stepping motor portion protrudes. This protrusion may become an obstacle, and work operability of the zoom microscope may be deteriorated. For example, when the sample is illuminated from the outer periphery of the zoom microscope using a light source attached to the tip of the fiber, there are cases where the protrusion of the stepping motor part becomes an obstacle and the sample cannot be illuminated from a desired direction. For example, when a zoom microscope is incorporated in a semiconductor inspection apparatus, the projection of the stepping motor portion may be an obstacle and the zoom microscope cannot be incorporated.

  The present invention has been made in view of the above, and an object of the present invention is to provide a zoom microscope capable of changing the zoom magnification manually and electrically and having good work operability.

  In order to solve the above-described problems and achieve the object, a zoom microscope according to the present invention includes a main body frame including a zoom optical system having a zoom lens held by a lens holding member movable in an optical axis direction. A zoom zoom mechanism for changing the zoom magnification by moving the zoom lens in the optical axis direction via the lens holding member, a zoom handle for manually operating the zoom zoom mechanism, and a zoom handle inserted in the main body frame. An electric zoom unit that is detachably inserted to electrically drive the zoom magnifying mechanism, and a coupling mechanism that couples the electric zoom unit and a shaft of the zoom handle.

  In the zoom microscope according to the present invention as set forth in the invention described above, the electric zoom unit is detachably disposed in the main body frame.

  In the zoom microscope according to the present invention, in the above invention, the electric zoom unit is configured to drive the electric actuator, an output shaft of the electric actuator, a sensor that senses a predetermined sensor sensing member, and the electric actuator. Operating means for operating, and control means for controlling the drive of the electric actuator, wherein the coupling mechanism includes a speed change mechanism that engages with the output shaft and the sensor sensing member, and the control means includes the operating means And driving of the electric actuator is controlled based on the operation signal and a sensing signal indicating that the sensor senses the sensor sensing member.

  The zoom microscope according to the present invention is characterized in that, in the above invention, the speed change mechanism of the coupling mechanism is provided in the main body frame.

  The zoom microscope according to the present invention is characterized in that, in the above invention, the transmission mechanism of the coupling mechanism is provided on an outer surface of the main body frame.

  In the zoom microscope according to the present invention as set forth in the invention described above, the electric zoom unit is arranged in parallel with an axis of the zoom handle.

  The zoom microscope according to the present invention includes a main body frame having a zoom optical system having a zoom lens held by a lens holding member movable in the optical axis direction, and the zoom lens via the lens holding member. A zoom zoom mechanism for moving in the optical axis direction to change the zoom magnification; a zoom handle for manually operating the zoom zoom mechanism; and a zoom zoom mechanism that is removably inserted into the main body frame. An electric zoom unit that is electrically driven and a coupling mechanism that couples the shaft of the zoom handle are provided.

  In the zoom microscope according to the present invention, an electric zoom unit that electrically drives a zoom magnifying mechanism is detachably inserted into a main body frame holding a zoom optical system, so that the zoom magnification can be changed manually and manually. Compared to a possible zoom microscope, the projection of the zoom lens body is small, so that the work operability is good.

  The best mode for carrying out the present invention will be described below. The present invention is not limited to the embodiments. In the description of the drawings, the same parts are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 is a side view of the zoom microscope 100 according to the first embodiment. The zoom microscope 100 includes a stage 2 on which the sample 1 is placed. The stage 2 is installed on the gantry 3. A column 4 is installed on the gantry 3, and a focusing unit 5 is assembled to the column 4. The focusing unit 5 holds the zoom lens body 7 and moves along the support column 4 as the focusing handle 6 rotates. The objective lens 8 is held by the zoom lens body 7 and is disposed at a position facing the stage 2. The lens barrel 9 is arranged at the upper part of the zoom lens body 7 in the vertical direction. The lens barrel 9 includes an eyepiece 10 and a mounting port 11 for mounting a digital camera (not shown) that captures an observation image. The eyepiece 10 is mounted obliquely upward on the front side.

  The zoom handles 12a and 12b are disposed at positions facing each other on the left and right side surfaces of the zoom lens barrel 7, and are manually rotatable. FIG. 1 illustrates only a zoom handle 12 a disposed on the left side from the front of the zoom microscope 100. As shown in FIG. 1, the zoom handles 12 a and 12 b are arranged at the upper rear portion when viewed from the front of the zoom lens body 7.

  The electric zoom unit 13 is inserted into the zoom lens body 7 from the lower part in the vertical direction of the zoom handle 12a. The electric zoom unit 13 includes a control unit 15 and a foot switch 17. The foot switch 17 is electrically connected to the control unit 15 via the cable 16, and the control unit 15 is electrically connected to the main body of the electric zoom unit 13 via the cable 14. The control unit 15 includes a control circuit and a power supply device, and controls driving of the electric zoom unit 13 according to the operation of the foot switch 17.

  The specimen 1 is illuminated by an illumination device (not shown), and the observation light of the specimen 1 passes through the objective lens 8 and the zoom lens body 7 in this order and reaches the lens barrel 9. Thereafter, the observation light is divided into two by the lens barrel 9 and reaches the eyepiece 10 and the mounting opening 11. The observer operates the focusing handle 6 to focus the objective lens 8 on the sample 1, and operates the zoom handles 12a and 12b or the foot handle 17 to adjust the zoom magnification to a desired zoom magnification.

  Next, the zoom lens body 7 and the electric zoom unit 13 will be described in detail. 2 and 3 are cross-sectional views illustrating a schematic configuration of the zoom lens body 7 before the electric zoom unit 13 is inserted. 2 is a view of the zoom mirror body 7 as viewed from the left side, and FIG. 3 is a view of the zoom mirror body 7 as viewed from the front (right side surface in FIG. 2). As shown in FIG. 2, the zoom lens body 7 includes zoom lens groups 21, 22, 23, and 24 as a zoom optical system and a main body frame 20 that holds the zoom optical system therein. The zoom lens groups 21, 22, 23, and 24 are arranged in this order from the top in the vertical direction, and are arranged so that the optical axis L1 passes through the center of each zoom lens group. The zoom lens group 21 is fixed to the ceiling portion of the main body frame 20 via a lens holding frame (not shown), and the zoom lens group 24 is fixed to the bottom portion of the main body frame 20 via a lens holding frame (not shown). . The zoom lens groups 22 and 23 are held by lens holding frames 25 and 26. The lens holding frames 25 and 26 are provided with cam follower parts 25a and 26a, and are engaged with cam grooves 27a and 27b formed in the cam shaft 27 so as to be movable. In addition, the cam groove 27a and the cam groove 27b have opposite inclinations. The camshaft 27 is disposed in the main body frame 20 in parallel with the optical axis L1. The pulley 28 is installed at the tip of the camshaft 27 and is connected to the pulley 29 via a belt (not shown) and a guide pulley (not shown). The main body frame 20 and the pulley 29 are accommodated in the cover 30.

  In the first embodiment, the camshaft 27 and the pulleys 28 and 29 form a zoom magnification changing mechanism. When the pulley 29 is rotated by an external force, the pulley 28 is rotated, the camshaft 27 is rotated, and the lens holding frames 25 and 26 are moved in directions opposite to each other in parallel with the camshaft 27. Move in opposite directions on the optical axis L1, and the zoom magnification changes.

  Moreover, as shown in FIG. 2, the main body frame 20 includes an opening 20a. The opening 20a is located at the lower part of the pulley 29 in the vertical direction, and a part thereof is blocked by the surface 20b. The surface 20b includes a long hole 201, a hole 202, and screw holes 203, 204, and 205. As shown in FIG. 3, the cover 30 includes an opening 30a at a position facing the opening 20a.

  As shown in FIG. 3, the pulley 29 is disposed in a space between the left main body frame 20 and the cover 30 from the front of the zoom microscope 100 and rotates about the zoom handle shaft 31. The zoom handle shaft 31 passes through the main body frame 20 and the cover 30, and zoom handles 12 a and 12 b are attached to both ends of the zoom handle shaft 31. When the observer manually rotates the zoom handles 12a and 12b, the zoom handle shaft 31 rotates, the pulley 29 rotates, the camshaft 27 rotates through the pulley 28, and the zoom lens groups 22 and 23 emit light. Moving in the direction of the axis L1, the zoom magnification changes. That is, the observer can manually change the zoom magnification using the zoom handles 12a and 12b.

  A stopper 32 is installed in a space between the main body frame 20 on the right side and the cover 30 as viewed from the front of the zoom microscope 100. The stopper 32 is a disk that rotates about the zoom handle shaft 31 as a central axis, and includes a protrusion 32a on the disk. The protrusion 32a collides with the protrusion 20c provided on the outer surface of the main body frame 20 to suppress the rotation of the stopper 32 to 360 degrees or less, thereby suppressing the rotation of the zoom handle shaft 31 to 360 degrees or less.

  When the zoom handle shaft 31 is rotated in a predetermined direction until the rotation of the cam grooves 27a and 27b and the pulleys 28 and 29 is restricted by the stopper 32, the zoom lens groups 22 and 23 come closest to each other, and the stoppers When the zoom handle shaft 31 is rotated in a direction opposite to a predetermined direction until the rotation is limited by 32, the zoom lens group 22 comes closest to the zoom lens group 21 and the zoom lens group 23 moves to the zoom lens group 24. It has been adjusted to be closest. Accordingly, the zoom magnification is determined according to the rotation angle of the zoom handle shaft 31. The zoom handle 12b includes a zoom magnification display 33 that indicates the relationship between the rotation angle of the zoom handles 12a and 12b and the zoom magnification.

  In addition, the disk 34 and the gear 35 rotate synchronously with the pulley 29 and the stopper 32 about the zoom handle shaft 31 as a central axis. The disk 34 and the gear 35 are provided in the main body frame 20. The disk 34 includes a magnet 34a at a predetermined position on the outer periphery. The gear 35 is engaged with the gear 36. Note that the diameter of the gear 35 is larger than the diameter of the gear 36. The shaft 37 is joined to the inner surface of the main body frame 20 and holds the gears 36 and 38. The gears 36 and 38 rotate synchronously about the shaft 37 as a central axis. In the first embodiment, the gears 35, 36, and 38 form a connection mechanism that connects the zoom handle shaft 31 and the electric zoom unit 13.

  Next, the electric zoom unit 13 will be described with reference to FIGS. 4 and 5. 4 and 5 are diagrams showing a schematic configuration of the electric zoom unit. FIG. 4 is a front view of the electric zoom unit 13, and FIG. 5 is a side sectional view of the electric zoom unit 13. As shown in FIG. 4, the electric zoom unit 13 includes a stepping motor 40. The output shaft 40 a of the stepping motor 40 includes a gear 41. Note that the diameter of the gear 38 is larger than the diameter of the gear 41. The fixed base 42 fixes and holds the stepping motor 40 and the magnetic sensors 43 a and 43 b and is fixed to the plate 44. The plate 44 includes pins 45 a and 45 b on the same surface as the surface that holds the fixed base 42. As shown in FIG. 5, the plate 44 includes a hole 441 and screw holes 442, 443, 444.

  The plate 44 is fixed to the cover 47 via legs 46a, 46b, and 46c. The legs 46a, 46b, and 46c are pipe-shaped tubes that communicate the screw holes 442, 443, and 444 with three screw holes (not shown) provided in the cover 47. The cover 47 fixes and holds the connector 48 on the surface opposite to the surface provided with the legs 46a, 46b, and 46c. The wiring 49 coming out of the stepping motor 40 and the wiring 50 coming out of the magnetic sensor 43 are connected to the connector 48 through the holes 441. The connector 48 is electrically connected to the control unit 15 via the cable 14.

  6 and 7 are sectional views showing a schematic configuration of the zoom lens body 7 after the electric zoom unit 13 is inserted. 6 is a view of the zoom mirror body 7 as seen from the left side, and FIG. 7 is a view of the zoom mirror body 7 as seen from the front (right side in FIG. 6). The electric zoom unit 13 is removably inserted into the main body frame 20 through the openings 20a and 30a. When the electric zoom unit 13 is inserted, the plate 44 fits into the opening 20a and the cover 47 fits into the opening 30a. In this case, as shown in FIG. 6, the pin 45b fits into the long hole 201 and the pin 45a fits into the hole 202, and the screw holes 442, 443, 444 and the screw holes 203, 204, 205 face each other. Communicate. The observer screws the screw 51 and two screws (not shown) into the screw holes 203, 204, and 205 from the three screw holes of the cover 47 via the legs 46a, 46b, and 46c and the screw holes 442, 443, and 444. Thus, the electric zoom unit 13 can be fixed to the main body frame 20.

  When the electric zoom unit 13 is fixed to the main body frame 20, the gear 41 engages with the gear 38 as shown in FIG. 7. If the crest of the gear 41 and the crest of the gear 38 come into contact with each other when the electric zoom unit 13 is inserted into the main body frame 20, the observer rotates the zoom handle 12a, 12b to rotate the gear 38. Thus, the gear 41 and the gear 38 can be engaged.

  When the electric zoom unit 13 is fixed to the main body frame 20, the magnetic sensors 43 a and 43 b are disposed below the disk 34 in the vertical direction. The magnetic sensors 43a and 43b sense the magnet 34a when the magnet 34a is closest to each sensor. 8, 9 and 10 are diagrams showing the positional relationship between the magnetic sensors 43a and 43b and the magnet 34a. FIG. 8 is a diagram illustrating a state in which the magnet 34a is closest to the magnetic sensor 43a. FIG. 9 is a diagram illustrating a state in which the magnet 34a is not approaching the magnetic sensors 43a and 43b. FIG. 10 is a diagram illustrating a state in which the magnet 34a is closest to the magnetic sensor 43b. For example, in the case shown in FIG. 8, the zoom lens groups 22 and 23 are closest to each other and the zoom magnification is minimum. In the case shown in FIG. 10, the zoom lens group 22 is closest to the zoom lens group 21 and the zoom lens group 23 is The magnet 34a is disposed so as to be closest to the zoom lens group 24 and maximize the zoom magnification. In this case, in the case shown in FIG. 9, the zoom magnification is an arbitrary magnification between the lowest magnification and the highest magnification. In the case shown in FIGS. 8 and 10, the magnetic sensors 43 a and 43 b input a sensing signal indicating that the magnet 34 has been sensed to the control unit 15.

  When receiving the input of the sensing signal, the control unit 15 limits the rotation direction of the zoom handle shaft 31 by limiting the rotation direction of the stepping motor 40. For example, in the case shown in FIG. 8, when receiving an instruction to increase the zoom magnification from the foot switch 17, the control unit 15 inputs a signal for rotating the zoom handle shaft 31 clockwise to the stepping motor 40. When an instruction to lower is received, the stepping motor 40 is not driven, and for example, a warning sound is emitted from a speaker (not shown). In the case shown in FIG. 10, when receiving an instruction to decrease the zoom magnification, the control unit 15 inputs a signal for rotating the zoom handle shaft 31 counterclockwise to the stepping motor 40, but instructs to increase the zoom magnification. If it is received, the stepping motor 40 is not driven and a warning sound is emitted from a speaker (not shown), for example. In the case illustrated in FIG. 9, the control unit 15 drives the stepping motor 40 in accordance with an instruction input from the foot switch 17. Therefore, when the zoom handle shaft 31 is driven electrically, the rotation of the zoom handle shaft 31 is suppressed to 360 degrees or less by the control unit 15 and the stopper 32.

  As shown in FIG. 7, when the electric zoom unit 13 is fixed to the main body frame 20, when the stepping motor 40 is driven according to the operation of the foot switch 17, the gear 41 rotates to rotate the gear 38. When the gear 38 rotates, the gear 36 rotates in synchronization with the gear 38 and rotates the gear 35. When the gear 35 rotates, the zoom handle shaft 31 rotates, and the pulley 29, the stopper 32, and the disk 34 rotate synchronously. When the pulley 29 rotates, the camshaft 27 rotates through the pulley 28, the zoom lens groups 22 and 23 move in the direction of the optical axis L1, and the zoom magnification changes. For this reason, the observer can operate the foot switch 17 to change the zoom magnification electrically.

  The gears 35, 36, and 38 are speed change mechanisms, and the diameter of the gear 38 is larger than the diameter of the gear 41, and the diameter of the gear 35 is larger than the diameter of the gear 36. The motor is decelerated and transmitted to the zoom handle shaft 31.

  In the zoom microscope 100 according to the first embodiment, since the electric zoom unit 13 is housed in the main body frame 20, the protrusion by the stepping motor or the like is small, so that the work operability is good. Further, since the zoom microscope 100 includes the zoom handles 12a and 12b on the left and right as viewed from the front, the observer can manually operate the zoom handle on either the left or right. For this reason, the observer can change the zoom magnification by using the zoom handles 12a and 12b or the foot switch 17 according to the dominant hand or according to the work on the specimen 1 such as dissection and assembly.

  Further, since the zoom microscope 100 includes zoom handles 12a and 12b at the upper rear portion when viewed from the front, the focusing handle 6 and the zoom handles 12a and 12b are compared with a conventional zoom microscope having a zoom handle at the upper front portion. The distance is short. For this reason, in the zoom microscope 100, the focusing operation and the zoom adjustment operation can be linked more easily than the conventional zoom microscope.

  The electric zoom unit 13 is detachable with respect to the zoom lens body 7. Therefore, when the electric zoom unit 13 is detached, the zoom microscope 100 can be used as a zoom microscope for manually changing the zoom magnification. FIG. 11 is a front sectional view of the zoom lens body 7 when the electric zoom unit 13 is detached. In this case, as shown in FIG. 11, the dummy cover 52 is fitted into the openings 20a and 30a. The dummy cover 52 includes a plate 53, a cover 54, legs 55 and 56, and legs not shown. The legs 55 and 56 and the legs (not shown) are pipe-like pipes that fix the plate 53 and the cover 54 to each other and communicate three screw holes (not shown) of the board 53 and the cover 54 respectively. When the plate 53 is fitted into the opening 20a, three screw holes (not shown) of the plate 53 communicate with the screw holes 203, 204, 205 in opposition to each other. The observer screws screws 57 and 58 and screws (not shown) into the screw holes 203, 204 and 205 from the screw holes of the cover 54, and fixes the dummy cover 52 to the main body frame 20. According to the dummy cover 52, when the electric zoom unit 13 is detached, it is possible to prevent dust from entering the zoom lens body 7.

(Embodiment 2)
In the first embodiment, gears 35, 36, and 38 are provided in the main body frame 20 to transmit the driving force of the stepping motor 40 to the zoom handle shaft 31, but in the second embodiment, the main body frame 20 and the cover are provided. A gear is provided between the zoom motor 30 and the driving force of the stepping motor 40 to the zoom handle shaft 31.

  FIG. 12 is a diagram illustrating a schematic configuration of the zoom lens body 70 of the zoom microscope according to the second embodiment. The zoom lens body 70 includes a main body frame 71 and a gear 72 instead of the main body frame 20 and the stopper 32. The gear 72 is disposed at the position of the stopper 32, that is, on the outer surface of the main body frame 71, and includes a protrusion 72a. The protrusion 72a collides with the protrusion 20c and suppresses the rotation of the zoom handle shaft 31 to 360 degrees or less. The zoom lens body 70 does not include the gears 35, 36, and 38 and the shaft 37 provided in the zoom lens body 7. Further, the stepping motor 40 includes an output shaft 40 b and a gear 73 instead of the output shaft 40 a and the gear 41. The output shaft 40b and the gear 73 are longer in the longitudinal direction than the output shaft 40a and the gear 41. The main body frame 71 includes an opening 71d in addition to the opening 20a, the surface 20b, and the protrusion 20c provided in the main body frame 20. The output shaft 40b and the gear 73 reach the space between the main body frame 71 and the cover 30 via the opening 71d, and the gear 73 engages with the gear 72. The diameter of the gear 72 is larger than the diameter of the gear 73. Other configurations of the zoom mirror 70 and the zoom microscope according to the second embodiment are the same as other configurations of the zoom mirror 7 and the zoom microscope 100.

  When the stepping motor 40 is driven and the output shaft 40b rotates, the gear 73 rotates, the gear 72 rotates, and the zoom handle shaft 31 rotates. When the zoom handle shaft 31 rotates, the pulley 29 rotates, the cam shaft 27 rotates through the pulley 28, the zoom lens groups 22 and 23 move in the direction of the optical axis L1, and the zoom magnification changes. In this case, the gear 72 is a speed change mechanism, and the rotation speed of the stepping motor 40 is decelerated by the gear 72 and transmitted to the zoom handle shaft 31.

  As with the zoom microscope 100, the zoom microscope according to the second embodiment has a small protrusion by a stepping motor or the like, and has good work operability. Furthermore, the zoom microscope according to the second embodiment can use a gear having a large diameter as the gear 72 without being restricted by the zoom magnification changing mechanism or the main body frame 71 by arranging the gear 72 outside the main body frame 71. Therefore, the reduction ratio can be increased only with the gears 72 and 73. For this reason, the zoom microscope according to the present invention can be manufactured with a smaller number of parts than in the first embodiment, and the manufacture of the zoom microscope according to the present invention is facilitated.

  In the first and second embodiments, the foot switch 17 is provided as the operating means of the electric zoom unit 13, but a hand switch may be provided instead of the foot switch 17 or in combination with the foot switch 17. Good.

It is a side view which shows schematic structure of the zoom microscope concerning Embodiment 1 of this invention. It is a figure which shows schematic structure of the zoom lens body before electric zoom unit insertion shown in FIG. It is a figure which shows schematic structure of the zoom lens body before electric zoom unit insertion shown in FIG. It is a figure which shows schematic structure of the electric zoom unit shown in FIG. It is a figure which shows schematic structure of the electric zoom unit shown in FIG. It is a figure which shows schematic structure of the zoom mirror body after electric zoom unit insertion shown in FIG. It is a figure which shows schematic structure of the zoom mirror body after electric zoom unit insertion shown in FIG. It is a figure which shows the positional relationship of the magnetic sensor and magnet shown in FIG. It is a figure which shows the positional relationship of the magnetic sensor and magnet shown in FIG. It is a figure which shows the positional relationship of the magnetic sensor and magnet shown in FIG. It is a figure which shows schematic structure of the zoom mirror body at the time of attaching a dummy cover. FIG. 4 is a diagram illustrating a schematic configuration of a zoom lens body of a zoom microscope according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Specimen 2 Stage 3 Base 4 Support column 5 Focusing part 6 Focusing handle 7, 70 Zoom lens body 8 Objective lens 9 Lens tube 10 Eyepiece 11 Mounting port 12a, 12b Zoom handle 13 Electric zoom unit 14, 16 Cable 15 Control part 17 Foot switch 20, 71 Body frame 20a, 30a, 71d Opening 20b Surface 20c, 32a, 72a Projection 21, 22, 22, 23 Zoom lens group 25, 26 Lens holding frame 25a, 26a Cam follower part 27 Camshaft 27a, 27b Cam groove 28, 29 Pulley 30, 47, 54 Cover 31 Zoom handle shaft 32 Stopper 33 Zoom magnification display 34 Disc 34a Magnet 35, 36, 38, 41, 72, 73 Gear 37 Shaft 40 Stepping motor 40a, 40b Output Shaft 42 Fixed base 43a 43b Magnetic sensor 44, 53 Plate 45a, 45b Pin 46a, 46b, 46c, 55, 56 Foot 48 Connector 49, 50 Wiring 51, 57, 58 Screw 52 Dummy cover 100 Zoom microscope 201 Slot 202, 441 Hole 203, 204, 205,442,443,444 Screw hole L1 Optical axis

Claims (7)

A main body frame having therein a zoom optical system having a zoom lens held by a lens holding member movable in the optical axis direction;
A zoom magnifying mechanism that moves the zoom lens in the optical axis direction via the lens holding member to change the zoom magnification;
A zoom handle for manually operating the zoom zoom mechanism;
An electric zoom unit disposed in the main body frame and electrically driving the zoom magnifying mechanism;
A coupling mechanism that couples the electric zoom unit and a shaft of the zoom handle;
A zoom microscope characterized by comprising:   The zoom microscope according to claim 1, wherein the electric zoom unit is detachably disposed in the main body frame. The electric zoom unit includes an electric actuator, an output shaft of the electric actuator, a sensor for detecting a predetermined sensor sensing member, an operating means for operating the driving of the electric actuator, and a control for controlling the driving of the electric actuator. Means and
The coupling mechanism includes a speed change mechanism that engages with the output shaft and the sensor sensing member,
3. The control unit according to claim 1, wherein the control unit controls driving of the electric actuator based on an operation of the operation unit and a sensing signal indicating that the sensor senses the sensor sensing member. The zoom microscope described.   The zoom microscope according to claim 3, wherein the transmission mechanism of the coupling mechanism is provided in the main body frame.   The zoom microscope according to claim 3, wherein the transmission mechanism of the coupling mechanism is provided on an outer surface of the main body frame.   The zoom microscope according to claim 1, wherein the electric zoom unit is disposed in parallel with an axis of the zoom handle. A main body frame having therein a zoom optical system having a zoom lens held by a lens holding member movable in the optical axis direction;
A zoom magnifying mechanism that moves the zoom lens in the optical axis direction via the lens holding member to change the zoom magnification;
A zoom handle for manually operating the zoom zoom mechanism;
A connecting mechanism that connects the zoom handle shaft and an electric zoom unit that is detachably inserted into the main body frame and that electrically drives the zoom scaling mechanism;
A zoom microscope characterized by comprising:

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