JP4421026B2 - Weight balance device for optical equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a weight balancer for optical equipment, and more particularly to a weight balancer suitable for application to an optical equipment having a base that moves up and down with various optical elements attached or removed.
[0002]
[Prior art]
FIG. 9 shows a photo slit lamp 30 as a conventional example of optical equipment.
[0003]
The photo slit lamp 30 shown in the figure includes a base support 33 arranged on a flat device substrate 32 in a fixed arrangement in the device main body 31 so as to be movable in the X and Y directions by a moving mechanism (not shown), and the base support 33. A base 34 disposed so as to be movable up and down in the Z direction under the action of the elastic force of the main coil spring 41 as the main elastic body shown in FIG. A mounting body 35 comprising a mounting cylinder portion 35a and an optical element mounting portion 35b which are integrally formed with the mounting cylinder portion 35a and curved upward and vertically above the base 34, and perpendicular to the mounting cylinder portion 35a. The illumination part 36 and the slit part 37 attached to the arrangement, the microscope 38 and the auxiliary attachment part 39 attached to the upper end region of the optical element attachment part 35b, and in the vicinity of the slit part 37 and facing the microscope 38. It has and a jaw receiving member 40 for the observed person attached to that region.
[0004]
A camera 48 is attached to the auxiliary attachment portion 39 as shown in FIG. 9, and the eye of the person to be observed observed with the microscope 38 is taken and the camera 48 is removed.
[0005]
The base support 33 and the base 34 include a main coil spring 41 between the upper surface portion 33a of the base support 33 and the inner bottom portion 34a of the base 34, as shown in an enlarged view in FIG. At the same time, the base 34 is supported by the vertical movement mechanism 42 provided on the base support 33 so as to be movable in the Z direction (vertical direction).
[0006]
The vertical movement mechanism portion 42 is rotatably disposed on one end side of the base support 33, and a drive shaft 43 having a handle 43 a fixed to the upper end portion, and a first gear fixed to the drive shaft 43. 44, a second gear 45 meshed with the first gear 44, a third gear 46 meshed with the second gear 45 and having a female thread portion 46a at the upper end, and the female thread A threaded portion 47a provided on the lower end side is screwed to the portion 46a, and a moving screw body 47 having an upper end passing through the main coil spring 41 and abutting against the inner bottom portion 34a of the base 34 is provided. Yes.
[0007]
The handle 43a is rotated while the weight applied to the cradle 34 is relaxed by the action of the elastic force of the main coil spring 41, and this rotational force is applied to the first, second, and third gears 44, 45, and 46. Is transmitted to the female screw 46a via the screw, whereby the moving screw body 47 is displaced in the Z direction, and the base 34 is moved up and down.
[0008]
[Problems to be solved by the invention]
However, in the case of the photo slit lamp 30 described above, the camera 48 attached to the auxiliary attachment portion 39 is detachable from the auxiliary attachment portion 39, and when the camera 48 is removed and used as shown in FIG. As shown in FIG. 9, when the camera 48 is attached to the auxiliary mounting portion 39 and used, a difference in weight distribution occurs corresponding to the weight of the camera 48 (for example, about 2 Kg).
[0009]
For this reason, when the camera 48 is mounted on the auxiliary mounting portion 39, a larger force is applied to the moving screw body 47 than when the moving screw body 47 is not mounted, leading to an increase in the amount of rotational force of the handle 43a, and the base 34 is There is a problem that the operability is lowered because it cannot be moved up and down smoothly.
[0010]
The present invention has been made in view of the above circumstances, and even when the mounting state of an auxiliary optical device such as a camera is changed, it is possible to always achieve a weight balance with simple adjustment, and accompanying the adjustment. It is an object of the present invention to provide a weight balance device for optical equipment that can objectively grasp the ability.
[0011]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a base disposed on the apparatus main body through a base support so as to be movable up and down under the action of the main elastic body, and mounting of the main optical equipment and auxiliary optical equipment attached to the base. A weight balancing device that balances the weight of an optical device having a possible optical element mounting portion, wherein the auxiliary elastic body is interposed between the base and the base support, and the optical element mounting portion. A force adjustment mechanism using an adjustment screw that adjusts the amount of force acting on the base from the auxiliary elastic body according to a change in the state of attachment of the auxiliary optical device to the base, and the auxiliary in accordance with the force adjustment by the adjustment screw It has a scale display part which displays the force value which acts on a base from an elastic body, It is characterized by the above-mentioned.
[0012]
According to the present invention, when a change occurs in the mounting state of the auxiliary optical device, the force acting on the base from the auxiliary elastic body is adjusted by only a simple operation of adjusting the adjusting screw body to achieve a weight balance. In addition, at this time, by visually recognizing the position of the adjustment screw body with respect to the scale of the scale display unit, the amount of force accompanying the adjustment of the adjustment screw body can be objectively grasped.
[0013]
According to a second aspect of the present invention, there is provided a base disposed on the apparatus main body through a base support so as to be movable up and down under the action of the main elastic body, and mounting of the main optical equipment and auxiliary optical equipment attached to the base. A weight balancing device that balances the weight of an optical device having a possible optical element mounting portion, and a plurality of auxiliary elastic bodies interposed between the base and the base support in an operating state, and the optical A force adjustment mechanism unit using an adjustment screw body that adjusts each force acting on the base from the plurality of auxiliary elastic bodies through an interlocking mechanism in accordance with a change in the state of attachment of the auxiliary optical device to the element mounting part. And 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.
[0014]
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 plurality of auxiliary elastic bodies can be obtained only by a simple operation of adjusting the one adjusting screw body. The weight can be adjusted by interlocking, and at this time, the position of the adjusting screw body with respect to the scale on the scale display part can be visually recognized, and the amount of force accompanying the adjustment of the adjusting screw body can be grasped objectively. it can.
[0015]
According to a third aspect of the present invention, in the weight balancing apparatus for an optical device according to the first or second aspect, the force adjustment mechanism portion projects from the upper surface of the base toward the base support side, and has a screw hole. A screw cylinder in which the portion is missing along the screwing direction, and an adjustment screw body in which a screw on the outer periphery of the bulging portion provided on the top of the screw cylinder is screwed, and the scale display portion is provided on the screw cylinder. A scale for displaying the force value is provided in a recessed groove portion that is visible from above the base formed along the lacking portion of the screw hole.
[0016]
According to the present invention, the force acting on the base from the auxiliary elastic body can be obtained only by a simple operation of adjusting the adjustment screw body screwed into the screw cylinder having a part of the screw hole missing along the screwing direction. It is possible to adjust and balance the weight, and it is possible to objectively grasp the amount of force accompanying adjustment of the adjustment screw body by looking at the position of the adjustment screw body with respect to the scale provided in the concave groove visible from above the base. it can.
[0017]
According to a fourth aspect of the present invention, in the weight balancing apparatus of the optical device according to the first or second aspect, the force adjustment mechanism portion projects from the upper surface of the base toward the base support, A screw cylinder in which the portion is missing along the screwing direction, and an adjustment screw body in which a screw on the outer periphery of the bulging portion provided on the top of the screw cylinder is screwed. A scale for displaying the force value formed so as to be visible from the viewing window on the side surface of the base is provided along the vicinity of the outer periphery of the lacked portion of the screw hole.
[0018]
According to the present invention, the force acting on the base from the auxiliary elastic body can be obtained only by a simple operation of adjusting the adjustment screw body screwed into the screw cylinder having a part of the screw hole missing along the screwing direction. It is possible to adjust and balance the weight, and by adjusting the position of the adjustment screw body with respect to the scale provided along the outer periphery of the screw hole lacking portion in the screw cylinder from the viewing window on the side surface of the base. It is also possible to objectively grasp the force associated with the adjustment of the screw body.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
[0020]
(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS. In the first embodiment, components having the same functions as those of the photo slit lamp which is the conventional optical apparatus shown in FIG. 9 are denoted by the same reference numerals.
[0021]
The photo slit lamp according to the first embodiment has basically the same configuration as that of the conventional example, but the weight balance device 1 unique to the first embodiment is added to the base support 33 and the base 34. The feature is that it was incorporated.
[0022]
The weight balancing apparatus 1 according to the first embodiment includes an auxiliary coil spring 2 as an auxiliary elastic body interposed between the upper surface portion 33a of the base support 33 and the base 34, and the auxiliary coil. A force adjustment mechanism unit 3 that always applies a force (elastic force) to the base 34 of the spring 2 and a scale display unit that displays the force of the auxiliary coil spring 2 provided to the force adjustment mechanism 3 against the base 34. 10.
[0023]
The force adjustment mechanism portion 3 includes a bulging portion 5b provided with a screw on the outer periphery on the top side, and a hole provided in the thick portion 33b of the base support 33 through the auxiliary coil spring 2 on the protruding end 5c side. The adjustment screw body 5 engaged with 6a and a part of the screw hole projecting from the upper surface of the base 34 toward the base support 33 and screwing into the outer periphery of the bulging portion 5b are screwed in. And a threaded cylinder 34b missing along the direction. A concave portion 5a for adjustment by a driver or the like is provided on the upper surface of the bulging portion 5b.
[0024]
As shown in FIGS. 3 and 4, the scale display unit 10 gives a force value to the concave groove 11 that is visible from above the base 34 provided in a state of being connected to the screw lacking portion 34 c of the screw cylinder 34 b. The scale 12 to be displayed is provided.
[0025]
This scale 12 shows an example of displaying 0 g to 100 g, for example, in the first embodiment, but can be set to various values according to the strength of the auxiliary coil spring 2 whose design is changed in accordance with the weight of the auxiliary optical device. Needless to say.
[0026]
Further, for example, two sets of the auxiliary coil spring 2, the force amount adjusting mechanism unit 3, and the scale display unit 10 described above are provided across the base 34 and the base support 33. Of course, it is also possible to have one set.
[0027]
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 in which a part of the screw hole is missing along the screwing direction can be performed by the simple operation. The amount of force acting on the base 34 from the coil spring 2 can be adjusted, and weight balance associated with the mounting of the camera 48 can be easily performed.
[0028]
Further, by looking at the position of the adjustment screw body 5 with respect to the scale 12 provided in the concave groove portion 11 visible from above the base 34, it is possible to objectively grasp the value of the force accompanying the adjustment of the adjustment screw body 5. It becomes possible.
[0029]
Further, by configuring the auxiliary coil spring 2, the force adjustment mechanism unit 3 and the scale display unit 10 in two sets, it is possible to perform force adjustment by individual adjustment of the adjustment screw body 5 of the force adjustment mechanism unit 3 of each group. In addition, by visually recognizing the position of the adjustment screw body 5 with respect to the scale 12 of the scale display unit 10 of each group, the strength adjustment state of each group can be individually confirmed.
[0030]
(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS.
[0031]
In the second embodiment, as shown in FIG. 6, the two auxiliary coil springs 2 </ b> A and 2 </ b> B interposed between the base 34 and the base support body 33 in the working state, and the two The force adjustment mechanism unit 20 using one adjustment screw body 5 that adjusts each force acting on the base 34 from the auxiliary coil springs 2A, 2B via the interlock mechanism 21, and the same scale as in the first embodiment The display unit 10 is provided.
[0032]
The interlocking mechanism 21 connects the lower part of the adjusting screw body 5 to a horizontally-arranged interlocking member 22, and the base support 33 is arranged such that the lower surface side of the interlocking member 22 passes through the auxiliary coil springs 2 </ b> A and 2 </ b> B. In this configuration, the top portions of the pair of support rods 23A and 23B engaged with the holes 6a of the thick portion 33b are respectively engaged.
[0033]
Even if such a force amount adjusting mechanism 20 is used, the force acting on the base 34 from the two auxiliary coil springs 2A and 2B can be interlocked only by a simple operation of adjusting one adjusting screw body 5. It is possible to adjust and balance the weight accompanying the mounting of the camera 48 or the like. Further, by visually observing the scale display unit 10, it is possible to objectively grasp the value of the force associated with the adjustment of the adjustment screw body 5.
[0034]
In addition to using the 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 it is easier to balance the weight.
[0035]
(Embodiment 3)
Next, a third embodiment of the present invention will be described with reference to FIGS.
[0036]
In the third embodiment, instead of the scale display unit 10 described above, as shown in FIGS. 7 and 8, the force value is displayed along the vicinity of the outer periphery of the screw hole lacking portion in the screw cylinder 34b. The scale 12 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.
[0037]
The visual window 26 can be configured, for example, by fitting a transparent plate 27 in front of the base 34. In this case, a cutout is provided in the vertical wall surface of the base support 33 so as not to obstruct the view reaching the scale display portion 10A.
[0038]
By providing such a viewing window 26, the value of the force visually recognized by each scale display unit 10 arranged corresponding to each auxiliary coil spring 2A, 2B in accordance with the adjustment of the two auxiliary coil springs 2A, 2B. There is an advantage of being able to read at the same time.
[0039]
Of course, the viewing window 26 can be provided on the side surface of the base 34.
[0040]
Similarly to the first and second embodiments, the weight balancing device 1 including the scale display unit 10A of the third embodiment also allows the screw hole in the screw cylinder 34b to be viewed from the viewing window 26 in front of the base 34. By looking at the position of the adjusting screw body 5 with respect to the scale 12 provided along the vicinity of the outer periphery of the lacking portion, it is possible to objectively grasp the amount of force accompanying the adjustment of the adjusting screw body 5.
[0041]
In the scale display unit 10 (or scale display unit 10A) described above, the area of the scale 12 can be displayed in a color-coded manner indicating the degree of the strength value, as shown in FIG.
[0042]
In this case, for example, when the full scale is set to 100 g, the region a having a force value of 0 to 50 g is colored in blue, the region b having 50 to 80 g is yellow, and the region c having 80 to 100 g is red. By visually recognizing and discriminating the color of the position of the adjustment screw body 5 with respect to the color-coded scale 10, it is possible to intuitively understand that the adjustment force amount is small or large, and can be used as a guideline for the force adjustment work. it can.
[0043]
【The invention's effect】
According to the first aspect of the present invention, it is possible to achieve a weight balance only by a simple operation of adjusting the adjusting screw body, and it is possible to objectively grasp the amount of force accompanying the adjustment of the adjusting screw body. An instrument weight balance device can be provided.
[0044]
According to the second aspect of the present invention, there is provided a weight balancing device for an optical apparatus capable of adjusting the force of the two auxiliary elastic bodies in conjunction with each other with a simple operation of adjusting one adjusting screw body. Can do.
[0045]
According to the invention described in claim 3, as in the case of the invention described in claim 1, it is possible to achieve a weight balance only by a simple operation, and it is possible to objectively grasp the adjustment force from above the base. It is possible to provide a weight balance device for an optical instrument that can be used.
[0046]
According to the invention described in claim 4, as in the case of the invention described in claim 1, it is possible to achieve a weight balance only by a simple operation, and it is possible to objectively grasp the amount of adjustment force from the base side. It is possible to provide a weight balance device for an optical instrument that can be used.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a photo slit lamp which is a kind of optical apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a cross-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 showing a screw cylinder and a scale display portion of the first embodiment.
FIG. 5 is an enlarged perspective view of a base portion according to a second embodiment of the present invention.
FIG. 6 is a partial cross-sectional view showing an adjustment screw body and a force adjustment mechanism portion according to Embodiment 2 of the present invention.
FIG. 7 is an enlarged perspective view of a base portion according to a 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 cross-sectional view of a main part of a conventional photo slit lamp.
FIG. 11 is a partial perspective view showing a state in which 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 Force adjustment mechanism part 5 Adjustment screw body 10 Scale display part 10A Scale display part 11 Groove part 12 Scale 20 Force quantity adjustment mechanism part 26 Viewing window 33 ... Base Support 34 ... Base 35b ... Optical element mounting portion 41 Main coil spring

Claims (4)

A base that is arranged on the main body of the apparatus so as to move up and down under the action of the main elastic body via a base support, and an optical element mounting portion that can be attached to the main optical equipment and auxiliary optical equipment attached to the base. A weight balancing device for balancing the weight of an optical instrument having:
An auxiliary elastic body interposed between the base and the base support in an operating state;
A force adjustment mechanism using an adjustment screw that adjusts the amount of force acting on the base from the auxiliary elastic body according to a change in the state of attachment of the auxiliary optical device to the optical element attachment;
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 adjustment screw body;
A weight balancer for optical equipment, comprising: A base that is arranged on the main body of the apparatus so as to move up and down under the action of the main elastic body via a base support, and an optical element mounting portion that can be attached to the main optical equipment and auxiliary optical equipment attached to the base. A weight balancing device for balancing the weight of an optical instrument having:
A plurality of auxiliary elastic bodies interposed in an operational state between the base and the base support;
Ability adjustment using an adjustment screw body that adjusts each amount of force acting on the base from the plurality of auxiliary elastic bodies according to a change in an attachment state of the auxiliary optical device to the optical element attachment portion via an interlock mechanism. A mechanism part;
A scale display for displaying a force value acting on the base from the auxiliary elastic body in accordance with the force adjustment by the adjustment screw,
A weight balancer for optical equipment, comprising: The force amount adjusting mechanism portion projects from the upper surface of the base toward the base support, and has a screw cylinder in which a part of the screw hole is missing along the screwing direction, and a swelling provided on the top of the screw cylinder. It has an adjustment screw body screwed with the screw on the outer periphery of the protruding portion,
The scale display part is configured by providing a scale for displaying the force value in a recessed groove part visible from above the base formed along the lacking part of the screw hole of the screw cylinder,
The weight balance apparatus of the optical instrument according to claim 1 or 2. The force amount adjusting mechanism portion projects from the upper surface of the base toward the base support, and has a screw cylinder in which a part of the screw hole is missing along the screwing direction, and a swelling provided on the top of the screw cylinder. It has an adjustment screw body screwed with the screw on the outer periphery of the protruding portion,
The scale display part is configured by providing a scale for displaying the force value formed so as to be visible from the viewing window on the side of the base along the vicinity of the outer periphery of the screw hole lacking part in the screw cylinder,
The weight balance apparatus of the optical instrument according to claim 1 or 2.

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