JP2601767Y2 - Target electric switching device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric target switching device which can be used, for example, as a revolver rotating device of a microscope.

[0002]

2. Description of the Related Art In recent years, the automation of microscope apparatuses has been advanced. For example, Japanese Patent Application Publication No.
A technique is described in which an objective lens revolver is driven by a motor, and the rotation of the motor is stopped by detecting that an arbitrary objective lens has reached a reference position by a sensor or the like.

[0003] The device disclosed in the publication has an engagement groove 2a formed along the outer peripheral surface of the revolver 1 as shown in FIG.
The revolver 1 is mechanically stopped at a reference position by pressing an engagement ball 4 fixed to the leaf spring 3 against the inner inclined surface of the leaf spring 3 with the spring force of the leaf spring 3. No. 60-45214 describes a technique in which a turret provided with a plurality of optical systems is driven and stopped by a motor.

In the device disclosed in the publication, the engaging means is not a leaf spring but a torsion coil spring 5 as shown in FIG. The turret 8 is mechanically stopped at the reference position by pressing the engaging piece 7 rotatably fixed to the link plate 6 against the engaging groove 9 of the turret 8 by the spring force of the torsion coil spring 5. .

[0005]

The revolver rotation device and the turret rotation device shown in FIGS. 10 and 11 have a constant amount of spring force of the engagement spring. Therefore, in order to prevent overrun of the motor and to surely stop the target at the reference position, the spring force of the engagement spring is set to be strong in advance.

However, the revolver and turret rotating devices shown in FIGS. 10 and 11 require a large rotating torque exceeding the engaging spring force when the revolver or turret starts rotating. As a result, a large motor that can easily obtain a large driving torque is required for the motor to be used, and there is a disadvantage that the device becomes large.

The present invention has been made in view of the above-described circumstances, and does not use a large motor that generates a large driving torque, but uses a small motor having a relatively small driving torque to reference an arbitrary target. It is an object of the present invention to provide a target electric switching device that can be reliably arranged at a position and that can reduce the size of the entire device.

[0008]

Target electric switching device of the present invention in order to achieve the above object, according to the Invention The drives the carrier having a plurality of targets in motor, any target from a plurality of targets At the reference position, the driving force from the motor is reduced with respect to the carrier.
And means for obtaining the motor stop timing.
Detecting means, an engaging portion formed on the carrier at a predetermined interval along the movement direction, an engaging member engaging the engaging portion with a predetermined amount of force to stop the carrier, and a carrier Person in charge of
An engaging force adjusting means for adjusting the strength of the engaging force of the joining member, and a supporting member in response to a motor stop signal from the detecting means.
Engaging force adjusting means for adjusting the engaging force of the engaging member with respect to the engaging member
And control means for controlling the Also,
The joining member is provided with a magnetic member, and the engagement force amount adjusting means is provided.
Is the repulsive force of the magnetic force
It is determined that the magnetic force generating means is adjusted by using the magnetic force and the attraction force.
Further, the engaging member has a folded portion, and the engaging force
The amount adjusting means has a opening having an opening facing the turn-back portion.
Link mechanism with a rotating link plate
It is arranged so as to be orthogonal to the moving direction, and rotates the link plate.
By controlling this, the amount of engagement force of the engagement member with respect to the carrier is adjusted.
And a solenoid to be adjusted.

[0009]

In the target electric switching device, for example, when the carrier rotates or moves linearly, the control means changes the engagement force adjusting means to the carrier of the engaging member in response to the motor stop signal from the detecting means. On the other hand, by performing control for adjusting the amount of engagement force, the amount of engagement force can be reduced. Accordingly, the carrier can be moved with a small driving torque at the start of the movement of the carrier, and the motor can be downsized.

After a certain period of time from the start of the movement of the carrier, the force adjusting means returns the engaging force of the engaging member to the carrier from the force adjusting means, and when stopped, the force adjusting means returns from the force adjusting means to the carrier of the engaging member. The target mechanically stops at the reference position by increasing the engagement force with respect to.

[0011]

Embodiments of the present invention will be described below. FIG. 1 shows a mechanical configuration of a revolver driving device for a microscope according to a first embodiment of the present invention.

The revolver driving device according to the present embodiment has a
1 and a rotating part 22 rotatably attached to the fixed part 21 about a revolver rotation axis.
Is attached to a microscope device (not shown) by a mounting ant 20 to which is attached. A gear 23 for transmitting the power of the motor is fixed to the outer periphery of the rotating part 22. still,
The rotating section 22 in the present embodiment has six attachment sections to which an objective lens having an arbitrary magnification (indicated by a virtual line in the drawing) can be attached and detached.

On the other hand, the motor 24 is fixed via a holding member 25 to a fixing plate 20a fixed to the mounting dovetail 20. The rotation shaft of the motor 24 passes through the holding member 25. A gear 26 is fixed to a rotating shaft of the motor 24 that penetrates the holding member 25. The gear 26 meshes with the gear 23 on the revolver side via an intermediate gear 27. Here, the gear ratio between the gear 23 and the gear 26 of the rotating unit 22 is such that when the gear 26 rotates once, the rotating unit 22 on the revolver side rotates.
The objective lens located next to the reference position attached to is adjusted so as to come to the reference position.

A disc-shaped mark plate 28 is attached concentrically to the rotating shaft of the motor 24 between the gear 26 and the holding member 25. One notch is formed on the outer periphery of the mark plate 28 to obtain the motor stop timing. A sensor 29 for detecting the notch is provided at a position facing the holding member 25. Note that a detection signal (hereinafter, referred to as a motor stop signal) is output from the sensor 29 only when the objective lens is disposed on the observation optical axis as a reference position at the formation position of the notch on the mark plate 28. Has been adjusted as follows. This motor stop signal is output to an electronic control circuit 34 described later.

A click ball 30 is fixed to the rotating part 22 of the revolver, and the fixed part 21 is a leaf spring 3 whose tip is pressed on the locus of movement of the click ball 30.
One base end is fixed. The click ball 30 of the rotating part 22 and the leaf spring 31 of the fixed part 21 constitute an engaging mechanism.

Two magnetic members 32 such as magnets are fixed to the tip of the leaf spring 31, and the S pole and the N pole thereof are magnetized by two electromagnets disposed above and below the magnetic member 32, respectively. They are arranged to face the members 33a and 33b, respectively. Details of the engagement mechanism are shown in FIGS.

As shown in FIG. 1A, a long slot 31a is formed at the center of the leaf spring 31. The long hole for induction 31 a is oriented so that the major axis direction is orthogonal to the rotation direction of the rotating unit 22. Attract long hole 31
The two side surfaces of the opening facing each other in the major diameter direction of “a” extend toward the rotating part 22 with a gradient of 45 degrees, and are arranged so that the slopes thereof come into contact with the surface of the click ball 30. Then, when the center of the click ball 30 comes into the illustrated range of the spring of the leaf spring 31, the rotating part 22 is fixed by the pressing force of the leaf spring 31 so that the position of the objective lens coincides with the observation optical axis position. I do. FIG. 3 shows the configuration of the electric control system of this embodiment.

When the electronic control circuit 34 receives a revolver rotation signal from the controller 35, the magnetic force generation circuit 36 generates a magnetic field that causes the magnetic generation members 33a and 33b to release the engagement force of the leaf spring 31. Thereafter, a command is given to the motor driving unit 37 to rotate the motor 24 and the sensor 29
, The motor 24 is stopped.

The embodiment constructed as described above operates according to the time chart of FIG. That is, when a motor rotation signal is output from the controller 35 to the electronic control circuit 34, the electronic control circuit 34 operates the magnetic force generating circuit 36 to generate the following magnetic force on the magnetic force generating members 33a and 33b. The magnetic member 32 fixed to the leaf spring 31 by the magnetic force generated by the magnetic force generating members 33a and 33b
An attractive force is generated between the magnetic member 32 and the magnetic force generating member 33a, and a repulsive force is generated between the magnetic member 32 and the magnetic force generating member 33b. As a result, a force opposing the pressing force of the leaf spring 31 pressing the click ball 30 acts on the leaf spring 31. As a result, the amount of engagement force of the leaf spring 31 with the click ball 30 is reduced.

As described above, the leaf spring 31 and the click ball 30
After a lapse of a predetermined time after the engagement force with the motor has decreased to some extent, the electronic control circuit 34 issues a command to the motor drive circuit 37 to rotate the motor 24 toward the designated objective lens.

In response to the rotation command, the motor 24 rotates, and its rotating force is applied to the rotating unit 22 via the gears 26 and 27, and the rotating unit 22 starts rotating. At this time, since the engaging force amount of movement of the leaf spring 31 which has been regulated to the rotational portion 22 is smaller by the operation described above, the click ball 30 is relatively small in driving torque of the leaf spring 31 is called write oval hole 31a. After the start of rotation, the torque required for rotation is only the weight of the rotating part 22 and the objective lens, so that the driving torque required for the motor is small. After the rotation of the motor 24, the magnetic force generation circuit 36
When a predetermined time has elapsed, the generation of the magnetic force is stopped.

When the motor 24 rotates, the mark plate 28 attached to the rotating shaft of the motor 24 rotates in conjunction therewith. Then, after the click ball 30 enters the range of the leaf spring 31 and the notch on the mark plate 28 reaches the position of the sensor 29, a motor stop signal is output from the sensor 29 to the electronic control unit 34. The electronic control unit 34 stops the motor 24 immediately after receiving the motor stop signal. After the motor stops, the output of the motor stop signal is released.

Before and after the motor 24 stops, the electronic control circuit 34 activates the magnetic force generating circuit 36 to cause the magnetic force generating members 33a and 33b to generate a magnetic force having a polarity opposite to that at the start of the rotation operation. Due to the magnetic force generated by the magnetic force generating members 33a and 33b, the magnetic member 32 of the leaf spring 31 and the magnetic force generating member 3
3a, a repulsive force is generated, and an attractive force is generated between the magnetic member 32 and the magnetic force generating member 33b. As a result, a force in the direction of increasing the engagement force between the leaf spring 31 and the click ball 30 acts on the leaf spring 31, and the objective lens of the revolver designated by the controller 35 stops on the observation optical axis without fail. Positioned. After the motor stops and the objective lens stops at the reference position, the magnetic force is released, and the rotating unit 22 is fixed only by the pressing force of the leaf spring 31.

As described above, according to the present invention, since the engagement force of the leaf spring 31 is adjusted to be small at the time of starting the rotation of the motor, when the click ball 30 comes off from the long slot 31a for inviting the leaf spring 31, Therefore, the driving torque required for the motor 24 can be reduced. Therefore, a small motor can be used, and the entire device can be downsized.

In this embodiment, the magnetism generating member 33 is used.
Although the amount of engagement force was adjusted depending on whether or not the magnetic force was generated by the a and 33b, instead of completely stopping the generation of the magnetic force, the intensity of the voltage or current output by the magnetic force generation circuit 36 was changed stepwise. However, even if the strength of the engagement force is adjusted, the maximum driving torque can be reduced, and the size of the motor and the size of the device can be reduced.

In the above embodiment, the magnetic member 32
The magnetism generating members 33a and 3a facing the magnetic member 32, respectively.
3b is described as two pairs, but the number may be one pair, three pairs or more, or even if the magnetism generating members 33a and 33b are not pairs but only one. , The effect does not change. Next, a second embodiment of the present invention will be described.

FIG. 5 shows a configuration of a main part of a revolver driving device according to a second embodiment. Note that the configuration other than that shown in FIG. 5 is the same as that of the first embodiment described above, and thus only different portions will be described in detail here.

In this embodiment, the engaging force adjusting means for adjusting the engaging force of the leaf spring is constituted by using a linearly moving solenoid and a cam link mechanism. A rectilinear solenoid 41 is fixed near the leaf spring of the fixed plate 20a.
The cam pin 42 at the tip of the first operating rod 41a is
Are slidably connected to the cam groove. The link plate 43 is rotatably attached to the fixed plate 20a around a shaft 44 as a fulcrum. The other end of the link plate 43 is provided with an opening 4 which is opposed to a folded portion 46 of a leaf spring 31 'described later.
5 are provided. On the other hand, as shown in FIG. 6, the leaf spring 31 'is formed by cutting out a part of the leaf spring 31' and bending the cutout to form a folded portion 46. FIG. 7 shows the configuration of the electric control system of this embodiment.

The electronic control circuit 34 'includes a controller 35
Receiving the revolver rotation signal from the
As a result, a magnetic field that causes the solenoid 41 to release the engagement force of the leaf spring 31 'is generated. After that, the motor 24 is rotated by the motor drive unit 37. When the motor stop signal is output from the sensor 29, the motor 24 is stopped . The operation of the present embodiment configured as described above will be described.

The revolver driving device is initially shown in FIG.
It is assumed that the state shown in FIG. As shown in the time chart of FIG. 8, when a motor rotation signal is output from the controller 35 to the electronic control circuit 34 ', the electronic control circuit 3
4 'operates the solenoid drive circuit 47, and the operating rod 41a is extended by the magnetic force generated in the solenoid 41. When the operating rod 41a is extended, the cam pin 4 at the tip of the operating rod 41a
2 moves rightward in FIG. With the movement of the cam pin 42, the link plate 43 rotates about the rotation shaft 44, and FIG.
The state changes to the state shown in FIG. As a result, the opening 45 pushes the folded portion 46 on the leaf spring 31 ′ upward, and the amount of engagement force of the leaf spring 31 ′ is released.

When a predetermined time has elapsed, the electronic control circuit 3
4 'rotates in the direction of the objective lens to the specified motor 24 controls the motor drive unit 37. Note that the magnetic force of the solenoid is released after a predetermined time period of motor rotation.

When the motor 24 rotates, the mark plate 28 attached to the rotating shaft of the motor 24 rotates in conjunction therewith. Then, the click ball 30 is
After entering the range of the long slot 31a ', the notch on the mark plate 28 reaches the sensor 29, a motor stop signal is output to the electronic control circuit 34', and the motor 24 stops. After the motor stops, the motor stop signal is released.

Further, before and after the stop of the motor 24, the electronic control circuit 34 'operates the solenoid drive circuit 47 to generate a magnetic force in the solenoid 41. Due to this magnetic force, the cam pin 42 at the tip of the operating rod of the solenoid moves to the left in FIG. 5 and changes to the state shown in FIG. As a result, the link plate 43 rotates, and the opening 45 is
1 ′, the folded portion 46 is pushed down, and the leaf spring 3
The amount of engagement force 1 'is increased, and the objective lens of the revolver designated by the controller 35 is stopped on the observation optical axis. After the motor 24 stops and the objective lens stops at the reference position, it is fixed by the amount of engagement force of the leaf spring 31 ′ and the attraction force of the permanent magnet of the solenoid 41.

As described in detail above, according to this embodiment, the designated objective lens can be reliably stopped at the observation optical axis, and the amount of engagement force of the leaf spring 31 'is reduced by the solenoid 41 when the motor starts rotating. Therefore, the driving torque required for the motor 24 can be reduced. Therefore, a small motor 24 can be used,
The entire device can be downsized. Next, a third embodiment of the present invention will be described. FIG. 9 shows a configuration of a main part of a solenoid drive device according to a third embodiment.

In this embodiment, the engaging means is not a leaf spring,
This is an example using a torsion coil spring. An engaging mechanism is constituted by an engaging groove 51 formed at a predetermined interval on the outer periphery of the rotating portion 22 and an engaging rotating body 52.

The engagement rotating body 52 is rotatably fixed to one end of a link plate 53. The link plate 53 is supported so as to rotate about a shaft 54 attached to the fixed plate 20a (not shown). The coil portion of the torsion coil spring 55 is attached to the shaft 54. Both ends of the torsion coil spring 55 have pins 56 fixed to the fixed plate 20a.
And a pin 57 fixed to the link plate 53, and exerts a restoring force in a direction in which the engagement rotating body 52 is pressed against the engagement groove 51. A cam pin 42 at the tip of an operating rod of a linear solenoid 41 fixed to the fixed plate 20a is slidably connected to a cam groove of a link plate 53. The configuration of the electric control system is the same as that of the second embodiment.

The present embodiment constructed as described above operates in accordance with the time chart of FIG. 8 similarly to the second embodiment. That is, when a motor rotation signal is output from the controller 35, the electronic control circuit 34 'operates the solenoid drive circuit 47 to generate a magnetic force in the solenoid 41, and the cam pin 42 on the operating rod is moved downward as shown in FIG. Move in the direction. Then, as shown in FIG. 9B, the link plate 53 rotates so that the engagement rotating body 52 is separated from the engagement groove 51.

After a predetermined time, the motor drive section 37 is controlled to rotate the motor 24 in the direction of the designated objective lens. Note that the magnetic force of the solenoid is released after a predetermined time period of motor rotation.

When the motor 24 rotates, the mark plate 28 attached to the rotating shaft of the motor 24 rotates in conjunction therewith. After the engagement rotating body 52 enters the inside slope of the engagement groove 51, the cutout on the mark plate 28 is
Is reached, a motor stop signal is output to the electronic control circuit 34 ', and the motor 24 stops. After the motor stops, the motor stop signal is released.

Further, before and after the motor 24 stops, the electronic control circuit 34 'operates the solenoid driving circuit 47 to generate a magnetic force in the solenoid 41,
9 is moved upward in FIG. Then, as shown in FIG. 9A, the link plate 53 rotates upward and acts in a direction to increase the amount of engagement force together with the amount of spring force of the torsion coil spring 55. As a result, the objective lens of the revolver designated by the controller 35 can be stopped on the observation optical axis. After the motor 24 stops and the objective lens stops at the reference position, it is fixed by the amount of engagement force of the torsion coil spring 55 and the attraction force of the permanent magnet of the solenoid 41.

As described in detail above, the designated objective lens can be reliably stopped on the observation optical axis, and the setting of the engaging force of the torsion coil spring 55 can be set and released by the solenoid 41 when the motor starts rotating. Therefore, the driving rotational torque required for the motor 24 can be small, and a small motor 24 can be used.
The entire device can be downsized.

In the first to third embodiments, the electric switching device using a motor has been described. However, the operation and effect are the same even in the case of manual operation instead of electric operation. If manually,
Attach a touch sensor that activates when it comes into contact with the outer periphery of the revolver. Then, a magnetic force may be generated in the magnetic generating members 33A, 33B or the solenoid through the magnetic force generating circuit by a magnetic force generating signal output from the touch sensor when the revolver is touched to rotate the revolver.

Although the description has been given of the case where the amount of engaging force is increased at the time of stopping, if the amount of engaging force by the spring force is set to be relatively high beforehand, the operation can be performed without stopping the amount of engaging force at the time of stopping. , The effect does not change.

Also, the case where a rotating body (revolver) is used as the carrier has been described, but the present invention can be applied to a slider or the like that moves linearly instead of the rotating body. The target need not be an objective lens. The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

[0045]

[Effects of the Invention] As described in detail above, according to the present invention, an arbitrary target can be reliably positioned at the reference position using a small motor having a relatively small driving torque without using a large motor that generates a large driving torque. And a target electric switching device capable of reducing the size of the entire device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a mechanical configuration of a revolver driving device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a portion related to a leaf spring in the device shown in FIG.

FIG. 3 is a diagram showing a configuration of an electric control system of the device shown in FIG.

FIG. 4 is a time chart showing operation timing of the device shown in FIG. 1;

FIG. 5 is a diagram showing a mechanical configuration of a main part of a revolver driving device according to a second embodiment of the present invention.

6 is a configuration diagram of a portion related to a leaf spring in the device shown in FIG.

7 is a diagram showing a configuration of an electric control system of the device shown in FIG.

8 is a time chart showing operation timings of the device shown in FIG.

FIG. 9 is a diagram showing a mechanical configuration of a main part of a revolver driving device according to a third embodiment of the present invention.

FIG. 10 is a configuration diagram of a conventional revolver driving device.

FIG. 11 is a configuration diagram of a conventional turret driving device.

[Explanation of symbols]

21: fixed part, 22: rotating part, 23, 26: gear, 24
... Motor, 27 ... Intermediate gear, 28 ... Mark plate, 29 ... Sensor, 30 ... Click ball, 31, 31 '... Leaf spring,
32a, 32b: magnetic member, 33a, 33b: magnetic generating member, 34: electronic control circuit, 36: magnetic force generating circuit, 41
... Straight solenoid, 43 ... Link plate, 45 ... Opening, 4
6 ... Folding part.

Claims (3)

(57) [Scope of request for utility model registration] 1. A carrier having a plurality of targets is mounted on a motor.
In the target electric switching device that drives with a motor and arranges an arbitrary target from among the plurality of targets at a reference position, the driving force from the motor is reduced with respect to the carrier.
Means for transmitting, engagement detecting means for obtaining the stop timing of the motor, and the engagement portion formed at predetermined intervals along the moving direction to the bearing member, at a predetermined force with respect to the engagement portion An engaging member for stopping the carrier, engaging force adjusting means for adjusting the strength of the engaging force of the engaging member with respect to the carrier, and a motor stop signal from the detecting means, Carrying
The engagement for adjusting an engagement force of the engagement member with respect to a body
A target electric switching device, comprising: control means for controlling the power adjusting means . 2. The method according to claim 1, wherein the engaging member includes a magnetic member.
The engaging force adjusting means is configured to engage the carrier with the carrier.
A magnet that adjusts the amount of engaging force of a member with the repulsive force of magnetic force and the attraction force
2. The tar as claimed in claim 1, which is a force generating means.
Get electric switching device. 3. The engaging member has a folded portion.
The engagement force adjusting means is configured to open the opening facing the folded portion.
Link machine with rotatably mounted link plate with mouth
Structure, and arranged so as to be orthogonal to the moving direction of the engaging portion.
And by controlling the rotation of the link plate,
A solenoid for adjusting the amount of engagement force of the engagement member with respect to
2. The tag according to claim 1, wherein
-Get electric switching device.