JP2001083429A - Weight balancing device for optical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight balancing device of an optical instrument constituted so that weight can be easily balanced and adjusting ability can be objectively grasped even when a fitting state of an auxiliary optical instrument is changed. SOLUTION: This weight balancing device is constituted so that the weight of the optical instrument is balanced. The optical instrument is provided with a base 34 arranged at a device main body through a base supporting body 33 so that it can be moved up and down by the action of a main coil spring 41, a main optical instrument fitted to the base 34 and an optical element fitting part to which the auxiliary optical instrument can be fitted. Then, the weight balancing device is provided with an auxiliary coil spring 2 intervening between the case 34 and the supporting body 33 in an action state, an ability adjustment mechanism part using an adjustment screw body 2 adjusting ability acting on the base 34 from the spring 2 according to the change of the fitting state of the auxiliary optical instrument fitted to the optical element fitting part and a division display part displaying a value of the ability acting on the base 34 from the spring 2 according as the ability is adjusted by the screw body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight balancing device for optical equipment, and more particularly to an optical equipment having a base that moves up and down with various optical elements attached or detached. It relates to a weight balancing device.

[0002]

2. Description of the Related Art FIG. 9 shows a photo slit lamp 30 as a conventional example of optical equipment.

The photo slit lamp 30 shown in FIG.
A base support 33 movably arranged in the X and Y directions by a moving mechanism (not shown) on a flat device substrate 32 fixedly arranged in the device main body 31;
3, a base 34 arranged to be movable up and down in the Z direction under the action of an elastic force of a main coil spring 41 as a main elastic body shown in FIG. A mounting body 35 comprising a mounting cylinder portion 35a formed and an optical element mounting portion 35b integrally formed with the mounting cylinder portion 35a and bent vertically upward through a base 34, and mounted vertically on the mounting cylinder portion 35a. The illumination unit 36, the slit unit 37, and the microscope 3 attached to the upper end region of the optical element attachment unit 35b
8 and an auxiliary mounting portion 39, and a jaw receiving member 40 for a subject who is mounted near the slit portion 37 and in a region facing the microscope 38.

As shown in FIG. 9, a camera 48 is mounted on the auxiliary mounting portion 39 so as to take an image of an eye of a subject to be observed by a microscope 38, and to remove the camera 48. .

[0005] The base support 33 and the base 34 are shown in FIG.
0, the upper surface portion 33 of the base support 33 is shown.
a between the main coil spring 4 and the inner bottom 34 a of the base 34.
The base 34 is movably supported in the Z direction (vertical direction) by a vertical movement mechanism 42 provided on the base support 33.

The vertical movement mechanism 42 includes a base support 33.
Is rotatably arranged on one end side of the handle, and a handle 4 is provided on the upper end.
3a, a drive shaft 43 fixed thereto, a first gear 44 fixed to the drive shaft 43, a second gear 45 meshed with the first gear 44, and a second gear 45 meshed with the second gear 45, And a third gear 46 having a female screw portion 46a at the upper end.
And a screw part 47a provided on the lower end side of the female screw part 46a.
And a moving screw body 47 whose upper end side passes through the main coil spring 41 and abuts against the inner bottom portion 34a of the base 34.

While reducing the weight applied to the receiving table 34 by the action of the elastic force of the main coil spring 41,
By rotating the handle 43a and transmitting the torque to the female screw 46a via the first, second, and third gears 44, 45, 46, the moving screw body 47 is displaced in the Z direction.
The base 34 is moved up and down.

[0008]

However, in the case of the photo slit lamp 30 described above, the auxiliary mounting portion 3 is required.
9 is detachable from the auxiliary mounting portion 39. When the camera 48 is detached and used as shown in FIG. 11, the camera 48 is attached to the auxiliary mounting portion 3 as shown in FIG.
In the case where the camera 48 is mounted on the camera 9 and used, there is a difference in weight distribution corresponding to the weight of the camera 48 (for example, about 2 kg).

For this reason, when the camera 48 is mounted on the auxiliary mounting portion 39, a larger force acts on the moving screw body 47 than when the camera is not mounted, causing an increase in the amount of rotational force of the handle 43a. There is a problem in that the platform 34 cannot be moved up and down smoothly and the operability is reduced.

The present invention has been made in view of the above circumstances, and even if the mounting state of an auxiliary optical device such as a camera is changed, it is possible to always achieve a weight balance with a simple adjustment, and An object of the present invention is to provide a weight balancing device for an optical device capable of objectively grasping the power required for adjustment.

[0011]

According to the first aspect of the present invention,
A base, which is vertically movable under the action of a main elastic body via a base support in the apparatus main body, and an optical element mounting portion to which main optical equipment and auxiliary optical equipment can be mounted, which are mounted on the base. A weight balancing device that performs weight balancing of an optical device having:
The auxiliary elastic body interposed between the base and the base support in an operative state, and acts on the base from the auxiliary elastic body in accordance with a change in the mounting state of the auxiliary optical device to the optical element mounting portion. A power adjustment mechanism using an adjusting screw body for adjusting the power,
A scale display unit for displaying a force value acting on the base from the auxiliary elastic body in accordance with the force adjustment by the adjusting screw body.

According to the present invention, when a change occurs in the mounting state of the auxiliary optical device, the amount of force acting on the base from the auxiliary elastic body is adjusted only by a simple operation of adjusting the adjusting screw, thereby achieving weight balance. And at this time,
By visually recognizing the position of the adjusting screw body with respect to the scale of the scale display unit, the amount of force involved in adjusting the adjusting screw body can also be objectively grasped.

According to a second aspect of the present invention, there is provided a base which is vertically movable under the action of a main elastic body on a main body of a device via a base support, and a main optical device and an auxiliary optical device mounted on the base. A weight balancing device that balances the weight of an optical device having an optical element mounting portion to which the device can be mounted, and a plurality of auxiliary elastic bodies that are operatively interposed between the base and the base support. A force amount using an adjusting screw body that interlocks and adjusts each amount of force acting on the base from the plurality of auxiliary elastic bodies via an interlocking mechanism in accordance with a change in the mounting state of the auxiliary optical device to the optical element mounting portion. An adjusting mechanism and a scale display unit for displaying a value of a force acting on the base from the auxiliary elastic body in accordance with a force adjustment by the adjusting screw.

According to the present invention, when a change occurs in the mounting state of the auxiliary optical device, a plurality of auxiliary elastic bodies can act on the base by a simple operation of adjusting the one adjusting screw. The amount of force required to adjust the adjustment screw can be grasped objectively by visually checking the position of the adjustment screw relative to the scale on the scale display. can do.

According to a third aspect of the present invention, in the weight balancing device for an optical device according to the first or second aspect, the force adjustment mechanism is provided so as to project from an upper surface of the base toward the base support. A screw cylinder having a part of the hole missing along the screwing direction, and an adjusting screw body in which a screw on the outer periphery of a bulging portion provided on the top of the screw cylinder is screwed. The present invention is characterized in that a scale for displaying the force value is provided in a recessed groove formed along the lacking portion of the screw hole of the screw cylinder and visible from above the base.

According to the invention, the auxiliary elastic body acts on the base from the auxiliary elastic body only by a simple operation of adjusting the adjusting screw body screwed into the screw cylinder having a part of the screw hole missing along the screwing direction. The amount of force involved can be adjusted to balance the weight, and the position of the adjusting screw body with respect to the scale provided in the groove that can be seen from above the base can be grasped objectively as to the amount of force associated with adjusting the adjusting screw body. can do.

According to a fourth aspect of the present invention, in the weight balancing device for an optical device according to the first or second aspect, the force adjusting mechanism is provided so as to protrude from an upper surface of the base toward the base support side, and is provided with a screw. A screw cylinder having a part of the hole missing along the screwing direction, and an adjusting screw body in which a screw on the outer periphery of a bulging portion provided on the top of the screw cylinder is screwed. The present invention is characterized in that a scale is provided along the vicinity of the outer periphery of a portion of the screw cylinder where the screw hole is missing to visually recognize the force value from the viewing window on the side surface of the base.

According to the present invention, the auxiliary elastic body acts on the base from the auxiliary elastic body only by a simple operation of adjusting the adjusting screw body screwed into the screw cylinder having a part of the screw hole missing along the screwing direction. The amount of force to be adjusted can be adjusted to balance the weight, and the position of the adjusting screw body with respect to the scale provided along the vicinity of the outer periphery of the lacking portion of the screw hole in the screw cylinder can be seen from the viewing window on the side surface of the base. Thus, it is possible to objectively grasp the amount of force involved in adjusting the adjusting screw body.

[0019]

Embodiments of the present invention will be described below in detail.

Embodiment 1 Embodiment 1 of the present invention will be described with reference to FIGS. The first embodiment
In FIG. 9, those having the same functions as those of the conventional optical apparatus shown in FIG.

The photo slit lamp according to the first embodiment has basically the same structure as that of the conventional example. However, the weight balance unique to the first embodiment is applied to the base support 33 and the base 34. The feature is that the device 1 is incorporated.

The weight balancing device 1 according to the first embodiment includes an auxiliary coil spring 2 serving as an auxiliary elastic body disposed in a region between the upper surface 33a of the base support 33 and the base 34.
A force adjustment mechanism 3 for constantly setting the force (elastic force) of the auxiliary coil spring 2 to the base 34 in an acting state; and the base 34 of the auxiliary coil spring 2 provided in the force adjustment mechanism
And a scale display unit 10 for displaying the amount of force with respect to the scale.

The force adjusting mechanism 3 has a bulging portion 5b provided with a thread on the outer periphery on the top side, and the protruding end 5c penetrates the auxiliary coil spring 2 to the thick portion 33b of the base support 33. One of the adjustment screw body 5 engaged with the provided hole 6a and one of the screw holes projecting from the upper surface of the base 34 toward the base support 33 and screwing with the screw on the outer periphery of the bulging portion 5b. And a screw cylinder 34b whose part is omitted along the screwing direction.
A concave portion 5a for adjustment by a driver or the like is provided on the upper surface of the bulging portion 5b.

As shown in FIGS. 3 and 4, the scale display section 10 is provided in a groove 11 which can be visually recognized from above the base 34 provided in a state of being connected to the screw lacking portion 34c of the screw cylinder 34b. The scale 12 for displaying the force value is provided.

In the first embodiment, an example is shown in which the scale 12 indicates 0 g to 100 g, for example. However, various values are set according to the force of the auxiliary coil spring 2 whose design is changed in accordance with the weight of the auxiliary optical device. Needless to say, it can be set to.

The auxiliary coil spring 2, the force adjusting mechanism 3 and the scale display 10 are provided, for example, in two sets over the base 34 and the base support 33. Of course, it is also possible to use one set.

According to the weight balancing device 1 of the first embodiment, only the simple operation of adjusting the adjusting screw body 5 screwed into the screw cylinder 34b having a part of the screw hole missing along the screwing direction is performed. By adjusting the amount of force acting on the base 34 from the auxiliary coil spring 2, it is possible to easily balance the weight associated with the mounting of the camera 48.

Further, by observing the position of the adjusting screw 5 with respect to the scale 12 provided in the concave groove portion 11 which can be visually recognized from above the base 34, the value of the force associated with the adjustment of the adjusting screw 5 is also objectively grasped. It is possible to do.

Further, by forming the auxiliary coil spring 2, the force adjusting mechanism 3, and the scale display 10 in two sets,
Each individual adjustment of the adjustment screw 5 of the force adjustment mechanism 3 of each set can be performed, and the position of the adjustment screw 5 with respect to the scale 12 of the scale display unit 10 of each set can be visually recognized. It is possible to individually confirm the state of the power adjustment of the set.

(Embodiment 2) Embodiment 2 of the present invention will be described with reference to FIGS.

In the second embodiment, as shown in FIG. 6, two auxiliary coil springs 2A and 2B interposed between the base 34 and the base support 33 in an operative state, respectively, A power adjusting mechanism unit 20 using one adjusting screw body 5 that interlocks and adjusts the respective forces acting on the base 34 from the two auxiliary coil springs 2A and 2B via the interlocking mechanism 21; A feature is that a similar scale display unit 10 is provided.

The interlocking mechanism 21 connects the lower portion of the adjusting screw 5 to an interlocking member 22 which is horizontally arranged.
Of the pair of support rods 23A and 23B engaged with the holes 6a of the thick portion 33b of the base support 33 so as to penetrate the auxiliary coil springs 2A and 2B, respectively. Configuration.

Even with such a force adjusting mechanism 20, only a simple operation of adjusting one adjusting screw 5 can be performed.
The amount of force acting on the base 34 from the two auxiliary coil springs 2A and 2B can be adjusted in conjunction with each other to balance the weight when the camera 48 is attached. In addition, by visually recognizing the scale display section 10, it is possible to objectively grasp the value of the force associated with the adjustment of the adjustment screw body 5.

In addition to using two auxiliary coil springs 2A and 2B, it is also possible to employ a configuration using a larger number of auxiliary coil springs such as four or six. By increasing the number of auxiliary coil springs, the weight associated with the mounting of the camera 48 and the like can be dispersed over a wide range, and there is an advantage that the weight can be more easily balanced.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS.

In the third embodiment, instead of the scale display section 10 described above, as shown in FIGS. 7 and 8, the force value is set along the vicinity of the outer periphery of the portion of the screw cylinder 34b where the screw hole is missing. Is provided, and a scale display unit 10A configured to be visible from a viewing window 26 provided in front of the base 34 is used. Other configurations of the force adjustment mechanism are the same as those in the first or second embodiment.

As the viewing window 26, for example, a base 34
Can be configured by fitting a transparent plate 27 in front of the device. still,
In this case, the scale display unit 1 is provided on the vertical wall surface of the base support 33.
A notch is provided so as not to obstruct the view to 0A.

By providing such a viewing window 26, the amount of force visually recognized by each scale display unit 10 corresponding to each of the auxiliary coil springs 2A, 2B with the adjustment of the two auxiliary coil springs 2A, 2B. There is an advantage that the value of can be read simultaneously.

The viewing window 26 can of course be provided on the side of the base 34.

As with the first and second embodiments, the weight balance device 1 having the scale display section 10A according to the third embodiment also allows the screw cylinder 34b to be viewed from the viewing window 26 at the front of the base 34. By observing the position of the adjusting screw 5 with respect to the scale 12 provided along the vicinity of the outer periphery of the lacking portion of the screw hole in, the amount of force involved in adjusting the adjusting screw 5 can be objectively grasped.

In the scale display section 10 (or scale display section 10A), as shown in FIG. 4, the area of the scale 12 may be displayed in different colors indicating the magnitude of the force value.

In this case, for example, when the full scale is set to 100 g, the area a of the force value of 0 to 50 g is colored in blue, the area b of 50 to 80 g is yellow, and the area c of 80 to 100 g is red. By visually recognizing and determining the color of the position of the adjusting screw 5 with respect to the color-coded scale 10, it is possible to intuitively grasp that the amount of adjustment force is small or large, etc. can do.

[0043]

According to the first aspect of the present invention, it is possible to balance the weight only by a simple operation of adjusting the adjusting screw, and to objectively grasp the amount of force involved in adjusting the adjusting screw. The present invention can provide a weight balancing device for an optical device that can perform the above-mentioned operations.

According to the second aspect of the present invention, there is provided a weight balance device for an optical apparatus which can adjust the amount of force of two auxiliary elastic bodies in an interlocking manner by a simple operation of adjusting one adjusting screw body. Can be provided.

According to the third aspect of the invention, similarly to the first aspect of the invention, it is possible to balance the weight only by a simple operation, and to objectively grasp the amount of adjustment force from above the base. The present invention can provide a weight balancing device for an optical device that can perform the above-mentioned operations.

According to the fourth aspect of the present invention, similarly to the first aspect of the present invention, it is possible to balance the weight only by a simple operation, and to objectively grasp the amount of adjustment force from the base. The present invention can provide a weight balancing device for an optical device that can perform the above-mentioned operations.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a photo slit lamp, which is a kind of an optical apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the photo slit lamp according to the first embodiment.

FIG. 3 is an enlarged perspective view of a base portion of the photo slit lamp according to the first embodiment.

FIG. 4 is a partial cross-sectional view illustrating a screw cylinder and a scale display unit according to the first embodiment.

FIG. 5 is an enlarged perspective view of a base portion according to the second embodiment of the present invention.

FIG. 6 is a partial cross-sectional view illustrating an adjustment screw body and a force adjustment mechanism according to a second embodiment of the present invention.

FIG. 7 is an enlarged perspective view of a base portion according to the third embodiment of the present invention.

FIG. 8 is a partially enlarged view showing a scale display unit and a viewing window according to the third embodiment.

FIG. 9 is a perspective view showing a conventional photo slit lamp.

FIG. 10 is a sectional view of a main part of a conventional photo slit lamp.

FIG. 11 is a partial perspective view showing a state where a camera is removed from a conventional photo slit lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weight balance apparatus 2 Auxiliary coil spring 2A Auxiliary coil spring 2B Auxiliary coil spring 3 Strength adjustment mechanism part 5 Adjustment screw body 10 Scale display part 10A Scale display part 11 Groove part 12 Scale 20 Force adjustment mechanism part 26 Viewing window 33 ... Base Support 34: Base 35b: Optical element mounting part 41 Main coil spring

Claims (4)

[Claims] 1. A base which is arranged on a main body of an apparatus via a base support so as to be movable up and down under the action of a main elastic body, and a main optical device and an auxiliary optical device which can be mounted on the base. A weight balancing device that balances the weight of an optical device having an element mounting portion, wherein an auxiliary elastic body interposed in an operative state between the base and the base support, and an auxiliary to the optical element mounting portion. A force adjusting mechanism using an adjusting screw body that adjusts the amount of force acting on the base from the auxiliary elastic body in accordance with a change in the mounting state of the optical device; and A scale display unit for displaying a value of a force acting on a base, and a weight balancing device for an optical device, comprising: 2. A base which is disposed on a main body of the apparatus via a base support so as to be movable up and down under the action of a main elastic body, and a main optical device and an auxiliary optical device which can be mounted on the base. A weight balancing device that balances the weight of an optical device having an element mounting portion, wherein a plurality of auxiliary elastic bodies interposed in an operative state between the base and the base support, and the optical element mounting portion A force adjustment mechanism unit using an adjustment screw body that interlocks and adjusts each amount of force acting on the base from the plurality of auxiliary elastic bodies via an interlocking mechanism in accordance with a change in the state of attachment of the auxiliary optical device to the; A scale display unit for displaying a value of a force acting on the base from the auxiliary elastic body in accordance with a force adjustment by an adjusting screw; 3. A screw cylinder which is provided to project from the upper surface of the base toward the base supporter and has a part of a screw hole missing along a screwing direction. An adjusting screw body formed by screwing a screw on an outer periphery of the bulging portion provided on the top portion, wherein the scale display portion is a concave portion which is visible from above a base formed along a lacking portion of the screw hole of the screw cylinder; The weight balancing device for an optical device according to claim 1, wherein a scale for displaying the force value is provided in the groove. 4. The screw amount adjusting mechanism section is provided so as to protrude from the upper surface of the base toward the base support side, and has a part of a screw hole missing along a screwing direction. An adjusting screw body in which a screw on the outer periphery of the bulging portion provided on the top is screwed, wherein the scale display portion is provided from a viewing window on a side surface of the base along the vicinity of the outer periphery of the screw hole in the screw cylinder. The weight balancing device for an optical device according to claim 1, further comprising a scale that is formed so as to be visually recognizable and that displays the force value.