JP2700201B2 - Position adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention facilitates precise position adjustment by switching between coarse movement and fine movement in the fields of measuring instruments, optical machines, and medical equipment. And a device for locking in a stop position.

[Conventional technology]

In the case of an ophthalmological examination device, the moving mechanism for switching the examination from one eye to the other eye does not distinguish between coarse and fine movements, one that operates coarse and fine movements separately, and the device in the stop position. For example, a lock device for fixing requires another operation.

[Problems to be solved by the invention]

In the case of a moving mechanism that does not distinguish between coarse movement and fine movement, precise position adjustment is difficult. Further, when the coarse movement and the fine movement are performed separately, position adjustment with one hand is impossible. In addition, in order to operate the locking device, the physician must look away from the examination device, search for the locking device, and then operate it by hand.

The present invention is intended to realize a device that allows a doctor to perform position adjustment operation while switching between coarse movement and fine movement with only one hand without keeping his eyes on the examination device, and to lock the stop position. is there.

[Means for solving the problem]

A moving body on which a medical examination device or the like is mounted is supported on a base so as to be capable of horizontal linear movement. The base is fitted with friction rails or racks parallel to the method of movement. A lifting body is supported by the moving body so as to be able to move up and down, and a friction wheel or gear to which friction braking is constantly applied is fixed to a lower portion of the lifting body. Then, the lifting member is pressed downward by a spline interposed between the moving member and the lifting member, whereby the friction wheel or gear is pressed against the friction rail or rack. The elevating body bears a rotating shaft having an operation knob located in the outside world, and its rotation is transmitted to a friction wheel or a gear through a group of reduction gears.

A fulcrum is provided on the moving body, an intermediate point of the lever is connected to the elevating body, and the lever is extended to a position near the knob. In other words, the lever operating section is located at a position where the finger of the hand holding the knob can be extended and operated.

[Action]

In the above-mentioned device, since the operating part of the lever is normally released, the lifting body is pushed down by the spring,
The friction wheels are pressed against the friction rails or the gears engage the rack. Then, since the friction wheel or gear is braked, the moving body is locked.

From this state, extend the fingers of the hand holding the knob,
When the lever is pulled up, the lever can be lifted by the leverage's boosting action to raise the lift with a fraction of the force pushing down the lift, and the hand is supported by the knob. Therefore, it is easy to apply force to the operation unit. As a result, the friction wheel or gear floats from the friction rail or rack and is unlocked, so that the moving body can be freely moved in a coarse movement state.

When the moving body is moved to the vicinity of the target position by the coarse movement, the lever is released and the knob is turned. When the lever is released, the moving body once enters the above-mentioned locked state, but when the knob is turned, the torque is increased by the reduction gear group, and the friction wheel or gear is gradually increased with a large torque that overcomes the braking. Rotate to. Therefore, since the moving body moves slightly, the position of the moving body can be precisely adjusted.

When the knob is released after the adjustment is completed, the moving body is locked as described above. Then, in order to rotate the knob, a torque that overcomes the braking of the friction wheel or the gear is required. Therefore, the knob does not rotate just by touching the knob by mistake.

As described above, in the present invention, the coarse movement is performed with only one hand,
The operation in three states of fine movement and lock can be performed. During that time, it is not necessary to look at the knob or lever operation part, so that the operation is extremely easy.

〔Example〕

1 and 2, reference numeral 1 denotes a base, 2 denotes a moving body, and guides 5, 6 provided on the moving body 2 face guides 3, 4 provided on the base 1, respectively. Between and 4,
The balls 7, 7 ‥‥ are interposed between the moving bodies 6, and the moving body 2 is a base 1
It is configured so that a smooth linear motion can be performed in the horizontal direction.

Between the holding portions 8, 8 formed on the front surface of the moving body 2,
The sliding portions 10 of the elevating body 9 are supported so as to be able to move up and down, and the sprung 12 interposed between the sprung support 11 provided at the upper end of the front surface of the moving body 2 and the upper surface of the elevating body 9 Is pressed downward.

An operation shaft 13 that penetrates the front wall 9a of the elevating body 9 is an external knob.
14 and a pinion 15 is formed at the other end.
The pinion 15 meshes with a gear 17 supported on a shaft 16 implanted on the inner surface of the elevating body, and a small gear 18 fixed on the gear 17 is supported on a shaft 9 similarly implanted on the inner surface of the elevating body. The gear 20 meshes. A friction wheel 21 having a fine knurl on the peripheral surface is fixed to the gear 20, and a friction plate 22 made of, for example, a cork plate is attached to the surface of the friction wheel 21 opposite to the gear 20. The ridge 23 interposed between the enlarged head 19a of the shaft 19 and the gear 20 presses the gear 20, whereby the friction plate 22 is pressed against the front wall 9a of the lifting body. In addition, the elevating body 9 is
As a result, the friction wheel 21 is pressed against a hard rubber friction rail 24 provided on the upper surface of the guide 3.

Reference numeral 25 denotes a lever member fixed to the side wall of the elevating body 9 by pins 26, 26, and claws 27, 27 formed on the right and left ends thereof correspond to the upper surface of a beam 28 fixed horizontally to the front wall of the moving body 2. Notch at its leading edge to remove gears 17, 20 and friction wheel 21
25a are formed. Y-shaped operation stick 2 located on the outer shape
Nine wings 29a, 29a are small holes 30, 3 drilled in the front wall 9a of the lifting body.
It penetrates into the inside of the elevating body 9 through 0, and is connected to the lever member 25 on both sides of the notch 25a.

In the above-described apparatus, when the operating rod 29 is pulled up, the elevating body 9 can be lifted against the pressing force of the spring 12.
As a result, the friction wheel 21 floats from the friction rail 24,
The moving body 2 can be roughly moved left and right (in a direction perpendicular to the plane of FIG. 1).

When the operating rod 29 is released, the elevating body 9 is lowered by the pressing force of the ridge 12, and the friction wheel 21 is seated on the friction rail 24.
Since the friction plate 22 attached to the friction wheel 21 is strongly pushed up by the elevating body front wall 9a by the ridge 23, the friction wheel 21 cannot rotate freely. When sitting on the top 24, the left and right movement of the moving body 2 is locked.

When the knob 14 is rotated in this locked state, the torque is increased by the pinion 15, the gear 17, the small gear 18, and the gear 20, and overcomes the friction force between the friction plate 22 and the elevating body front wall 9a, thereby causing the friction wheel to rotate. Rotate 21 slowly. Therefore, the moving body 2 can be finely moved left and right by the rotation of the knob 14.

Here, by appropriately selecting the diameter of the knob 14, the reduction ratio of the gear group, the pressing force of the ridge 23, and the friction coefficient of the friction plate 22,
By turning the knob 14 lightly and with good resistance, the moving body 2 can be finely moved left and right. In addition, by appropriately selecting the lever ratio with the operating rod 29 and the pins 26 and 26 of the lever member 25 as fulcrums, the lifting body 9 can be raised with a light force that is a fraction of the pressing force of the spring 12. it can.

Then, since the operation stick 29 can be pulled up by extending the finger of the hand holding the knob 14, the operation in three modes of coarse movement, lock, and fine movement can be performed with only one hand holding the knob 14.

FIG. 3 shows an eye examination apparatus to which the above embodiment is applied. On both sides of the rear end of the base 1 (left end in the figure)
1 and 31 are planted, between which face receiving frames 32 and 33 are attached. The moving body 2 is provided with an elevating rod 34 and an elevating knob 35 for elevating the elevating rod 34, and an eyeball microscope 36 is mounted on the elevating rod 34. The ocular microscope 36 has an objective lens 37 to be brought into contact with the cornea of the eyeball on the rear surface, a television camera, a mounting tube 38 for optional equipment such as an instant camera on the upper surface, and a camera or eyepiece mounting tube 39 on the front surface. , An illumination light source and other elements are housed therein.

The eye test signal includes three states: a coarse movement for selecting the left and right eyes with the other hand while operating the elevation knob 35 with one hand to adjust the height, a fine movement for the left and right, and a lock at a predetermined position. Can be performed, during which time the microscope observation can be continued through the viewfinder or eyepiece of the camera.

Note that a rack may be provided instead of the friction rail 24 so that the gear 20 meshes with the rack.

〔The invention's effect〕

As is apparent from the above embodiments, according to the present invention, it is possible to switch between three modes of position adjustment by coarse movement, position adjustment by fine movement and the locked state with only one hand,
In the meantime, it is not necessary to look at the operation location. Therefore,
The present invention can be applied to various measuring machines, optical machines, medical devices, and the like, including an eyeball microscope, so that precise position adjustment can be easily performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along the line AA in FIG. 3, and FIG. 3 is a side view of an eyeball inspection apparatus embodying the present invention. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Moving body, 3-6 ... Guide for horizontal linear movement, 7 ... Ball, 9 ... Lifting body, 12 ... Spawning, 13
…… Rotary axis, 14 …… Knob, 15 …… Pinion, 17, 18, 20
... gear, 21 ... friction wheel, 22 ... friction plate (braking member),
24 ... Friction rail, 25 ... Lever member (part of lever)
26 pins, 28 beams, 29 operating rods (operating levers).

Claims (2)

(57) [Claims] 1. A moving body is supported on a base so as to be capable of horizontal linear movement, and a friction rail is attached in parallel with the moving direction, and the moving body is supported by the moving body so as to be able to move up and down. A rotating shaft having a knob located in the outside world, wherein a friction wheel that is constantly braked is fixed to the shaft, and a spur that presses the friction wheel against the friction rail is interposed between the moving body and the elevating body. Is connected to the friction wheel via a reduction gear group, and is connected to both the moving body and the lifting / lowering body, and acts on the lifting / lowering body in a direction separating the friction wheel from the friction rail. Position adjustment device arranged close to 2. A moving body is supported on a base so as to be capable of horizontal linear movement, and a rack is mounted in parallel with the moving direction, and a moving body is supported on the moving body so as to be able to move up and down. While stopping the gear that is constantly braking,
The gear that presses the gear against the rack is interposed between the moving body and the elevating body, and a rotating shaft having a knob located outside is coupled to the gear through a reduction gear group, and the moving body and A position adjusting device which is connected to both of the elevating bodies and acts on the elevating bodies in a direction of moving the gears away from the rack.