JP3321909B2 - Microscope lighting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microscope illuminating device, and more particularly to a microscope illuminating device capable of replacing an objective lens by rotating a revolver.

[0002]

2. Description of the Related Art A conventional microscope illumination device includes a lamp as an illumination light source and a power supply for supplying power to the lamp. The lamp is turned on to irradiate a sample on a stage with light, and a revolver is rotated. The objective lens is changed to change the magnification.

[0003]

However, when the microscope is in use, the lamp is always lit, so when replacing the objective lens, strong light instantaneously enters the observer's eyes due to stray light, and observation is performed in a dark visual field. There was a problem that some of them were dazzling.

[0004] In addition, a microscope having a motorized revolver has a power source for driving the revolver in addition to a power source for the illumination light source, so that the manufacturing cost is increased and a large power source circuit is required. There was a problem that space was required.

The present invention has been made in view of such circumstances, and has as its object to eliminate instantaneous glare due to stray light when rotating a revolver, and to make it possible to share a power source for an illumination light source and an electric revolver. An object of the present invention is to provide a microscope illuminating device that can meet the demand for cost reduction and miniaturization.

[0006]

According to a first aspect of the present invention, there is provided a microscope illuminating apparatus, comprising: an illumination light source;
And a power supply for supplying power to the illumination light source, and an electric revolver.
An electric revolver drive circuit for driving the electric revolver;
A revolver drive instruction switch for instructing the
Microscope illumination device, wherein the revolver drive instruction
When the switch is turned on, the power supply destination from the power supply
Switch from the illumination light source to the electric revolver drive circuit
After turning on the revolver drive instruction switch,
When the objective lens of Volva enters the optical path, the power supply
From the electric revolver drive circuit.
Power supply destination switching means for switching to the illumination light source.
You.

A microscope illumination device according to a second aspect of the present invention includes a power supply, an illumination light source supplied from the power supply,
A motor, and the electric revolver is driven by the motor.
Electric revolver drive circuit powered by the power supply
And a revolver driving finger for instructing driving of the electric revolver
Indicating switch and a stop position of the electric revolver
A revolver position detection switch and the revolver drive instruction switch;
When the switch is turned on, the electric power is supplied to the electric revolver drive.
Connected to the drive circuit, and connected to the revolver position detection switch.
When it is detected that the electric revolver has stopped,
Power from the electric revolver drive circuit to the illumination light source.
And a power supply circuit for switching connection.

[0008]

[0009]

[ Function ] When the revolver drive instruction switch is turned on,
The power supply destination of the power supply is from the illumination light source to the electric revolver drive circuit
After turning on the revolver drive instruction switch
When the objective lens of the electric revolver enters the optical path
The power supply destination of the power supply is the electric revolver drive circuit.
Switch to the illumination light source from
There is no instantaneous glare due to stray light when
There is no need for a dedicated power supply for driving the revolver.

[0010]

[0011]

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

FIG. 1 is a circuit diagram of a microscope illumination device according to an embodiment of the present invention. FIG. 2 is a side view of the revolver for explaining a revolver position detection switch. FIG. 3 is a plan view of the revolver of FIG. 4 is an enlarged view of a part of the revolver of FIG. A tooth 2 is provided on the outer periphery of the knurl 1, one surface of the knurl 1 is formed as a convex surface, and a rail 3 is provided on the opposite surface along the circumferential direction.

On the convex surface of the knurl 1, four objective lenses (not shown) having different magnifications are fixed at regular intervals along the circumferential direction.

The rail 3 is provided with four grooves 4a to 4d corresponding to the number of objective lenses. Each groove 4a-4
d is provided at a position where the optical axis of the microscope coincides with the optical axis of the objective lens.

A revolver mounting portion 5 connected to a microscope body (not shown) is provided upright at the center of the opposite surface of the knurl 1, and the revolver mounting portion 5 is provided with a protruding portion 6 protruding in the radial direction. A revolver position detection switch 7 is attached to the protruding portion. Revolver position detection switch 7
A steel ball 7b is attached to the tip of the arm 7a. The steel ball 7b is pressed against the rail 3 by the elasticity of the arm 7a, and slides on the rail 3 as the knurl 1 rotates.
When the entire steel ball 7b is exposed on the rail 3 as shown in FIG. 2, the revolver position detection switch 7 keeps the off state, and as shown in FIG.
The revolver position detection switch 7 is turned on in a state where it has fallen into the grooves 4a to 4d.

As shown in FIG. 1, the revolver position detection switch 7 is connected in series to a main power switch 10 of a commercial power supply 9 on the input side of the power supply circuit 8, and a lamp 11 for illumination is provided on the output side of the power supply circuit 8. It is connected.

After the main power switch 10 is turned on, when replacing the objective lens during the observation operation, the revolver is manually rotated. Revolver position detection switch 7 during rotation of revolver
Remains off, and the lamp 11 is turned off. When the optical axis of the objective lens coincides with the optical axis of the microscope, the steel ball 7b of the revolver position detection switch 7 is inserted into the grooves 4a to 4d of the rail 3.
, The revolver position detection switch 7 is turned on, and the lamp 11 is turned on.

According to the microscope illuminating apparatus of this embodiment, the lamp 11 is turned off during the rotation of the revolver, so that there is no instantaneous glare due to stray light when replacing the objective lens.

The revolver position detection switch 7 may be arranged in series on the output side of the power supply circuit.

FIG. 5 is a circuit diagram of a microscope illumination device according to another embodiment of the present invention, FIG. 6 is a side view of the revolver for explaining a revolver position detection switch, FIG. 7 is a plan view of the revolver of FIG. 8 is an enlarged view of a part of the revolver of FIG. 6, and FIG. 9 is a time chart of the microscope illumination device. Portions common to the above-described embodiments are denoted by the same reference numerals, and description thereof is omitted.

In the above embodiment, a manual revolver was used, but in this embodiment, an electric revolver was used. 6 to 8
As shown in (1), the motor holding plate 12 was provided on the revolver mounting portion 5, and the motor 13 was mounted on the motor holding plate 12. A pinion gear 14 is attached to a shaft 13 a of the motor 13. The pinion gear 14 is provided on the opposite side of the knurl 21.
Is provided. When the electric revolver rotates and the optical axis of the objective lens and the optical axis of the microscope are displaced, the revolver position detection switch 37 is turned on. When the optical axis of the objective lens matches the optical axis of the microscope, the revolver shown in FIG. The steel ball 37b of the position detection switch 37 falls into the grooves 4a to 4d of the rail 3, and the revolver position detection switch 37 is turned off.

As shown in FIG. 5, a commercial power supply 9 is connected to the input side of the power supply circuit 28 via a main power switch 10. When the electric revolver is stopped, the output voltage of the power supply circuit 28 can be adjusted by the potentiometer 16. A normally open switch 31, a switch 17a, and a switch 18a of the first relay are connected in parallel with the volume 16. Power supply circuit 28
The output side of the first relay relay 19, the second relay
Are connected in parallel, and the illumination lamp 11 is connected via a contact 22a of a switch 22 of the second relay. Also, the second
The output side of the power supply circuit 28 is connected to the motor control circuit 23 via the contact 22b of the switch 22 of the relay.
The switches 17b and 18b each have a resistor 2
Contacts 2 of the switch 22 of the second relay via 4 and 25
2b and to the input terminal of the motor control circuit 23.

The revolver forward rotation instruction switch 17 is constituted by interlocking switches 17a and 17b, and the revolver reverse rotation instruction switch 18 is constituted by interlocking switches 18a and 18b. The first relay includes a switch 31 and a relay coil 19, and the switch 31 is turned on by the excitation of the relay coil 19. The second relay is composed of a switch 22 and a relay coil 20, and the switch 2
2 is normally energized by the contact 22a, and the switch 22 is switched to the contact 22b by the excitation of the relay coil 20.

The input terminal of the motor control circuit 23 is connected to the output side of the relay coils 19 and 20 via diodes 26 and 27. The output terminal of the motor control circuit 23 is
The motor 29, the revolver stop position detection switch 37 and the base of the relay coil drive transistor 30 are connected to each other. The emitter of the relay coil drive transistor 30 is connected to the output side of the relay coils 19 and 20, and the collector of the relay coil drive transistor 30 is connected to the ground line.

Next, the operation of the microscope illumination device will be described with reference to FIG.

Once the revolver forward switch 17 or the revolver reverse switch 18 is turned on, the output side of the relay coils 19, 20 is connected to the earth line via the diodes 26, 27.
0 is excited, the switch 31 is turned on, the switch 22 is switched to the contact 22b, the volume 16 is short-circuited, and the output voltage of the power supply circuit 28 is changed to the resistance R in FIG.
And the power supply destination of the power supply circuit 28 is switched from the lamp 11 to the revolver rotation control circuit. At the same time, the base potential of the relay coil drive transistor 30 rises to turn on the relay coil drive transistor 30.

When the motor drive output from the motor control circuit 23 is supplied to the motor 29, the revolver starts rotating, but actually starts rotating when the output voltage of the power supply circuit 28 becomes close to the rated voltage. When the revolver starts turning,
The revolver stop position detection switch 37 is turned on, and it is detected that the revolver is rotating. After the revolver rotates, even if the revolver normal rotation instruction switch 17 or the revolver reverse rotation instruction switch 18 is turned off, the relay coil drive transistor 30 is kept on, so that the first relay and the second relay are held. And the revolver keeps spinning.

When the revolver rotates and the optical axis of the objective lens coincides with the optical axis of the microscope, the revolver stop position detection switch 37 is turned off. Revolver stop position detection switch 37
Is off, a one-shot pulse generation circuit (not shown) of the motor control circuit 23 outputs a brake signal for braking the rotation of the motor (short-circuits both ends of the motor 29) for a certain period of time. The motor drive output of 23 stops. When the revolver stop position detection switch 37 is turned off and the motor drive output is stopped, the base potential of the relay coil drive transistor 30 decreases, the relay coil drive transistor 30 is turned off, and the first relay and the second relay are turned off. The relay is released, the power supply destination of the power supply circuit 28 is switched from the revolver rotation control circuit to the lamp 11, and the output voltage of the power supply circuit 28 also returns to the voltage under observation.

According to the microscope illuminating apparatus of this embodiment, when the revolver forward rotation instruction switch 17 or the revolver reverse rotation instruction switch 18 is turned on, the power supply destination of the power supply circuit 28 is switched from the lamp 11 to the revolver rotation control circuit. Since 11 is turned off, there is no instantaneous glare due to stray light when replacing the objective lens. In addition, since there is no dedicated power supply for driving the revolver, a single power supply is appropriately switched and shared, so the manufacturing cost is lower than that of the conventional example that has a power supply for driving the revolver separately from the power supply for the illumination light source. Reduction and space saving can be realized.

In each of the above embodiments, instead of turning off the lamp when the objective lens deviates from the optical path, it is possible to diminish the lamp so as not to dazzle.

[0031]

As described above, according to the microscope illumination device of the first or second aspect of the present invention, the revolver drive instruction is issued.
When the switch is turned on, the power supply destination is an illumination light source.
Switches to the electric revolver drive circuit and the light source turns off
Replace the objective lens as the motorized revolver starts to rotate
There is no instantaneous glare due to stray light. Also,
Power source for bright light source can be used as power source for electric revolver drive
To reduce manufacturing costs and save space.
Can be realized.

[0032]

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a microscope illumination device according to one embodiment of the present invention.

FIG. 2 is a side view of the revolver for explaining the revolver position detection switch.

FIG. 3 is a plan view of the revolver of FIG. 2;

FIG. 4 is an enlarged view of a part of the revolver of FIG. 2;

FIG. 5 is a circuit diagram of a microscope illumination device according to another embodiment of the present invention.

FIG. 6 is a side view of the revolver for explaining the revolver position detection switch.

FIG. 7 is a plan view of the revolver of FIG. 6;

FIG. 8 is an enlarged view of a part of the revolver of FIG. 6;

FIG. 9 is a time chart of the microscope illumination device.

[Explanation of symbols]

 1,21 knurl 3 rails 4a-4c groove 7,37 revolver position detection switch 7a, 37a arm 7b, 37b steel ball 9 commercial power supply 11 lamp 19,20 relay coil 21,31 switch

Claims (2)

(57) [Claims] An illumination light source and power supply to the illumination light source
Power supply and electric revolver drive to drive the electric revolver
Circuit and a revolver drive for instructing driving of the electric revolver
In the microscope illumination device having a movement instruction switch, when the revolver drive instruction switch is turned on, the
The power supply destination from the power source is
Switch to the volver drive circuit and switch to the revolver drive instruction switch.
After the switch is turned on, the objective lens of the electric revolver
When entering, the power supply destination from the power supply
Power supply for switching from the revolver drive circuit to the illumination light source
Microscope illumination characterized by comprising destination switching means
apparatus. 2. A power supply, an illumination light source supplied from the power supply, and a motor, wherein the motor drives an electric revolver.
Electric revolver drive circuit powered by the power supply
If, revolver drive instruction scan for instructing driving of the electric revolver
Switch and revolver position detection for detecting the stop position of the electric revolver.
When the output switch and the revolver drive instruction switch are turned on, the power
Source connected to the electric revolver drive circuit, and
The electric revolver is stopped by the lever position detection switch.
Is detected, the power supply is driven by the electric revolver.
A power supply circuit for switching connection from a circuit to the illumination light source.
A microscope illumination device, comprising: