JP2741203B2 - Ophthalmic surgery footswitch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a foot switch used for ophthalmic surgery.

2. Description of the Related Art An ophthalmic surgery apparatus mainly performs vitreous surgery.

 A typical example will be described.

In vitreous surgery, for example, a turbid portion of a gel-like vitreous between the lens of the eyeball and the retina (hereinafter referred to as an aspirated object)
Is excised, aspirated and removed to the outside, replacing it with a clear liquid. This allows light to pass through the crystalline lens and reach the retina, thereby improving visual acuity.

A cutter is used for this excision and suction. This cutter has a portion to be inserted into the eyeball, and cuts off the suctioned object while sucking the object at the tip of the insertion portion. The resected object is removed to the outside.

In addition, during the cutting with the cutter, if the cut cannot be performed well and the sucked object bites, the cutter is operated in reverse to prevent the bite.

Problems to be Solved by the Invention As described above, the cutter operation includes cutter driving, cutter driving and suction driving, suction driving, reverse driving of the cutter, and adjustment of the suction force, and the like. There must be.

Conventionally, a foot switch is used to switch the cutter. This is because the operation must be performed using a foot in order to perform an operation while holding the cutter by hand.

Conventionally, for performing such various operations, for example, two foot switches are arranged side by side. However, this makes the feet tired and susceptible to erroneous operations, making long-term surgery difficult. In addition, time loss occurs when replacing the foot, which affects the operator's concentration during the operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ophthalmic surgery foot switch that facilitates a switching operation in ophthalmic surgery and enables safe and reliable surgery.

SUMMARY OF THE INVENTION The invention is summarized in the claims.

Means for Solving the Problems Please refer to FIG. 2 and FIG.

The first switch 50 is composed of a first-stage operation for switching on / off by depressing and a second-stage operation for determining a control amount according to the amount of depression.

The second switch 60 is disposed near the first switch so that the second switch 60 can be switched on and off while operating the first switch 50.

The foot switch 40 of the present invention has a configuration in which an object to be controlled is determined by the states of the first switch 50 and the second switch 60.

Function One foot switch 40 is used to set the amount of depression, switch on / off by depression, and select other operation functions.
Do with.

Embodiment [Ophthalmic Surgery Apparatus] An ophthalmic surgery apparatus includes a suction unit 1, a cutter driving unit 2, a light source unit 3, and a perfusion bottle 4, a cutter with a suction function 5, a light guide 6, a perfusion plug 7, and a foot switch 40. I have.

The cutter 5 has an insertion portion 5a. The insertion portion 5a is inserted into the eyeball 13 through the sclera 15 of the eyeball 13. A suction port 30 is provided at the tip of the insertion section 5a. The cutter 5 can cut off the suction object 34 entering the suction port 30. The cut object to be sucked 34 can be sucked toward the suction section 1 through the insertion section 5a and the first passage 8.

4 The cutter drive unit 2 includes a tube 9 for compressed air.
Is connected. The compressed air is sent to the cutter 5 via the tube 9, and the cutter 5 is operated by the compressed air to cut off the suctioned object 34.

The light source unit 3 includes an optical fiber 11
The light can be sent through. Light guide 6
Is inserted into the eyeball 13. The light guide 6 can shine light near the suction port 30.

The perfusion bottle 4 contains a perfusion solution. The perfusate is supplied to the eyeball 13 via the perfusion tube 12 and the perfusion plug 7.
It can be sent inside. This perfusate is intended to replenish the inside of the eyeball 13 and recover intraocular pressure after excision and aspiration of the object 34 to be aspirated.

[Foot switch 40] A foot switch 40 is electrically connected to the suction unit 1 and the cutter drive unit 2.

 Please refer to FIG. 2 and FIG.

The foot switch 40 has a quadrangular shape when viewed in a plane. The foot switch 40 has a first switch 50, a second switch 60, and a footrest 70.

[First Switch 50] Referring to FIG. 3 and FIG.

The first switch 50 includes a switch 39, a tread plate 41, a side plate 42,
Variable resistor 43, spring 44, operating member 45, moving rod 46,
It has restoring springs 47 and 48 and a support base 49.

The step board 41 is a quadrilateral plate, and one end thereof is connected to the footrest 70 via a fulcrum pin 41a.

The upper part of the side plate 42 is a slope part 42a. As shown in FIG. 3, a side portion of the other end of the tread plate 41 rests on the slope portion 42a. In this state, the step plate 41 is moved by the restoring spring 47 to the bottom plate 41b.
Supported against. The side plate 42 is supported by an outer frame portion 42b via a restoring spring 48.

The support 49 of FIG. 3 is fixed to the bottom plate 41b. The moving rod 46 is inserted between the slope 49a and the operation member 45. The operation member 45 is supported on the outer plate 41c via a spring 44. The resistance value of the variable resistor 43 changes according to the amount of movement of the moving bar 46.

In the state (initial state) of FIG.
Is away. FIG. 5 shows the portion in an enlarged manner. When the tread plate 41 rotates in the direction of the arrow by the gap d, the variable resistor 43 has the initial value. By changing the value of the variable resistor 43, the suction capacity of the suction unit 1 in FIG. 1 can be adjusted. If the amount of depression is large, the suction force increases.

In FIG. 4, when the side plate 42 moves by a slide amount S (shown by a broken line), the switch 39 is turned on. Otherwise, switch 39 is off.

[Second Switch 60] FIG. 6 shows a portion A in FIG.

As shown in FIG. 6, the second switch 60 includes a restoring spring 61,
A switch 62 and a horizontal pressing plate 63 are provided. One end of the horizontal push plate 63 is a portion 63a that is pushed by a foot in the direction of arrow B. The other end of the horizontal push plate 63 is connected to the footrest 70 by a restoring spring 61. The switch 62 is provided inside the footrest 70. When the pushing part of the horizontal pushing plate 63 is pushed with the foot in the direction of arrow B,
It rotates in the direction of arrow C about the axis 64 against the restoring spring 61. When rotated, switch 62 is turned on. When the pressing of the foot is released, the state returns to the state shown in FIG.

 FIG. 7 shows the circuit.

The suction unit 1 and the cutter drive unit 2 are connected to the power supply. The cutter drive unit 2 is connected via a switch 39 and a switch 62. Suction unit 1 is a variable resistor
Connected via 43.

[Operation] Refer to Table 1.

The initial state is shown in FIG. The first switch 50 and the second switch 60 are both off.

[First Step Operation] First, the horizontal push plate 63 of the second switch 60 is pushed to switch 62
Turn on. When the treadle 41 of the first switch 50 in FIG. 3 is depressed, the side plate 42 in FIG.
Turns on. Thus, only the cutter 5 shown in FIG. 1 is driven.

[Second Stage Operation] The horizontal push plate 63 is pressed to turn on the switch 62. When the tread plate 41 is further depressed beyond the range of the gap d in FIG. 5, the moving rod 46 is pressed obliquely downward, and the operating member 45
Move against 44 forces. When the resistance value of the variable resistor 43 changes according to the moving amount and the stepping amount increases,
The suction capacity of the suction unit 1 in FIG. 1 increases linearly. That is, the cutter drive and the suction drive are performed simultaneously.

In the first stage operation described above, if the switch 62 is turned off without pressing the horizontal push plate 63 of the second switch 60 in FIG. 6, the cutting drive of the cutter 5 in FIG. 1 is reversed. Thereby, the sucked object is once separated from the cutter 5 for the safety of the operation.

In the second stage operation, when the switch 62 in FIG. 6 is turned off, only the suction drive can be performed.

Thus, four functions can be performed by one foot switch. It can be done with a small amount of motion.

When the operation is interrupted or terminated, the foot can be released from the tread plate 41 (the horizontal push plate 63 if necessary), and the operation can be returned to the state shown in FIG. The side plate 42 also returns to the original position by the force of the restoring spring 48. Also, the horizontal push plate 63 returns.

 Incidentally, the present invention is not limited to the above embodiment.

By changing the function arrangement of the foot switch, a combination that suits the purpose is possible.

Place another third switch, similar to the second switch, on the other side
By adding it, eight functions can be provided.

The switch 39 can be turned on and off by directly contacting the switch 39 with the tread plate without using the side plate 42, and the state can be electrically maintained by a latch or the like.

Instead of the switch 39, an optical switch such as a photoelectric tube may be used.

The switches 39 and 62 may use fibers or the like in addition to the electrical switches, and the light source and the light receiving unit may be arranged in a portion other than the foot switch. The switch 43 can obtain a similar function by using a linear fiber or the like.

Effect of the Invention As described above, various functions required in ophthalmic surgery can be exerted with only one foot switch. It is possible to eliminate the hassle of replacing the left foot during the operation with the right foot. Eliminate erroneous operation,
Surgery can be performed safely and reliably, and you can concentrate on surgery.

[Brief description of the drawings]

FIG. 1 is a view of an ophthalmologic surgery apparatus provided with a foot switch of the present invention, FIG. 2 is a plan view showing an embodiment of the foot switch, FIG. 3 is a cross-sectional view of the embodiment, FIG. 5 is an enlarged view of a portion D in FIG. 3, FIG. 6 is a diagram of a portion A in FIG. 2, and FIG. 7 is a diagram showing an example of a circuit. 40 Foot switch 50 First switch 60 Second switch

Claims (1)

(57) [Claims] A first switch (50) comprising a first-stage operation for switching on / off by depressing and a second-stage operation for determining a control amount in accordance with a depressing amount.
And a second switch (6) disposed near the first switch so that the first switch can be turned on and off while operating the first switch.
0), wherein an object to be controlled is determined according to the states of the first switch (50) and the second switch (60).