JP2864128B2 - Suction device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device used for ophthalmic surgery such as vitreous or cataract.

2. Description of the Related Art A suction device of this type is capable of accommodating an object to be aspirated (for example, a turbid vitreous body) in an eyeball in a suction cassette.

When holding the suction cassette in the main body of the suction device, the operator presses the suction cassette by hand and hooks the hook portion of the suction cassette to a latch mechanism or the like in the main body to hold the suction cassette. When removing the suction cassette, remove the hook of the suction cassette unit from the latch mechanism in the main body and take out the suction cassette by hand.

Problems to be Solved by the Invention However, in such a suction cassette insertion / removal and holding mechanism, when the suction cassette is inserted into the main body, the main body and the suction cassette are hermetically closed in order to evacuate the storage bottle in the suction cassette. There is a need. For this reason, when pushing in by hand, considerable force is required. Further, a force is required for fitting the hook into the latch mechanism.

Further, since the suction cassette needs to be taken out of the main body, a mechanism for removing the hook portion from the latch mechanism becomes complicated. In addition, appropriate power is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a suction device that can easily take out and hold a suction cassette in and out of a main body without applying force.

SUMMARY OF THE INVENTION The present invention relates to a suction device for sucking an object to be suctioned by depressurization, a main body, a suction cassette detachable from the main body and having a storage portion for the object to be suctioned, and suctioning the object to be suctioned into the suction cassette. And a retraction mechanism for retracting the suction cassette into the main body when the suction cassette is mounted, wherein the retraction mechanism utilizes the reduced pressure of the vacuum controller to retract the suction cassette. The gist of the present invention is a suction device characterized in that the suction device is configured as follows.

Means for Solving the Problems Reference is made to the embodiment of FIGS. 1 and 2.

The suction device of the present invention suctions an object to be suctioned W by decompression. This suction device includes a main body 1 and a main body 1.
Suction cassette 8 which is detachable and has an accommodating portion for the object to be suctioned. Vacuum controller 5 for sucking the object to be suctioned into the suction cassette, and drawing mechanism 2 for pulling suction cassette 8 into main body 1. .

Further, the main body 1 has a holding mechanism 3 for holding the suction cassette 8. The main body 1 includes a suction cassette 8 from the main body 1.
And an extruding mechanism section 4 for extruding. The holding mechanism 3 includes a compression pump 14 and an air cylinder 15. The pushing mechanism 4 has a spring 18.

The main body 1 has a switch 6 and a member. The switch 6 is for checking whether the suction cassette 8 is in the main body 1 or not. Whether or not the suction cassette 8 is inserted is indicated by a member (in the embodiment, the display 60, see FIG. 4) based on the signal content of the switch 6.

Operation As shown in FIG. 1, the suction cassette 8 is pulled into the main body 1 by the drawing mechanism 2. As shown in FIG. 2, the suction cassette 8 set by being drawn in is held by the holding mechanism 3 with respect to the main body 1 during the operation.

As shown in FIG. 3, for example, when the suction object 8 is full of the suction cassette 8, the suction cassette 8 is pushed out of the main body 1 by using the pushing mechanism 4.

Embodiment FIGS. 1 to 3 show an embodiment of a suction device according to the present invention.

In FIG. 1, the suction cassette 8 is going to be put in the main body 1. In FIG. 2, the suction cassette 8 is held.
In FIG. 3, the suction cassette 8 is about to be pushed out.

[Main body 1] Referring to FIG. The main body 1 includes a retraction mechanism 2,
It has a holding mechanism 3, an extrusion mechanism 4, a vacuum controller 5, a switch 6, and a switch 7.

The suction cassette 8 is detachable from the concave portion 23 of the main body 1.

[Retraction Mechanism 2] The retraction mechanism 2 includes a vacuum pump 10, a vacuum pad 11,
It has a tube 12 and a valve 13.

The retraction mechanism 2 includes a vacuum pump 10 and a vacuum pad 11
Are connected by a tube 12, and a valve 13 is provided therebetween. When the valve 13 is turned on by the signal of the switch 6, the depressurized air of the vacuum pump 10 is guided to the vacuum pad 11 through the tube 12. Thereby, the suction cassette 8 can be pulled in.

When the signal is released, the valve 13 is turned off, and the passage between the vacuum pump 10 and the vacuum pad 11 is closed. At the same time, the decompressed air in the vacuum pad 11 is released to the atmosphere through the valve 13 and the suction cassette 8 is separated from the vacuum pad 11.

[Holding mechanism 3] The holding mechanism 3 includes a compression pump 14, an air cylinder 15,
It has a tube 16 and a valve 17.

In the holding mechanism 3, the compression pump 14 and the air cylinder 15
Are connected by a tube 16, and a valve 17 is provided therebetween. The air cylinder 15 has a spring 15a and a piston 15b. When the compressed air enters the air cylinder 15, the piston 15b pushes up the spring 15a, and when the compressed air passes through, the piston 15b falls by the force of the spring 15a.

When the valve 17 is turned on by the signal of the switch 6, the compressed air from the compression pump 14 enters the air cylinder 15 through the tube 16 and lifts the piston 15b. When the signal is released, the valve 17 is turned off and the passage between the compression pump 14 and the air cylinder 15 is closed. Air cylinder at the same time
The compressed air in 15 passes through the valve 17 and is released to the atmosphere to lower the piston 15b.

In FIG. 1, the suction cassette 8 is about to be retracted. The valve 17 is ON, the valve 13 is ON, the piston 15b of the air cylinder 15 is up, and the vacuum pad 11 is in a state where the suction cassette 8 can be retracted.

[Pushing Mechanism 4] The pushing mechanism 4 has a spring 18 and a push rod 19 of a cassette. The push bar 19 is provided on the main body 1 side so as to be able to expand and contract.

[Vacuum control unit 5] The vacuum control unit 5 includes the vacuum pump 10, the pressure adjustment unit 20,
It has a tube 21 and a connection part 22. The vacuum pump 10
It functions in both the vacuum control unit 5 and the retraction mechanism unit 2. In the vacuum control unit 5, the vacuum pump 10 sucks the suction object W (see FIG. 2) by vacuum.

[Switch 6] The switch 6 is a limit switch for checking whether the suction cassette 8 has entered the concave portion 23 of the main body 1.

[Switch 7] The switch 7 is set on the main body 1, and when the operator pushes it with a finger to turn it on as shown in FIG. 3, the valve 13 of the retraction mechanism 2 and the valve 17 of the holding mechanism 3 are operated. The suction cassette 8 can be pushed out by the force of the spring 18.

[Suction Cassette 8] The suction cassette 8 is provided with the accommodating portion 30 for the suction object W and the passages 31, 32.
And a hook portion 40. One end of the passage 31 is connected to the outside of the suction cassette 8, and the other end is connected to the storage unit 30. One end 40a of the passage 32 is a mechanism for connecting to the connection portion 22. The other end of the passage 32 is connected to the storage section 30.

[Control Device] The control device in FIG. 4 is provided in the main body.

The power switch 50 supplies an on / off signal to the voltage supply unit 51. The switch 6 and the switch 7 for taking out the suction cassette are connected to a timer 53. Switch 6 is connected to display 60. When the switch 6 is turned on, that is, when the suction cassette 8 is set, the display 60 displays the setting to the operator.

The switch 7 is further connected to a control unit 52. The voltage supply unit 51 is connected to the control unit 52. The control unit 52 controls the compression pump 14, the vacuum pump 10, and the valves 17 and 13 based on the signal of the switch 7 and the voltage supply from the voltage supply unit 51.

The timer 53 has a switch 7 or a switch 6 for taking out.
Is turned on, the voltage is supplied from the voltage supply unit 51 to the control unit 52 for a certain period of time, that is, a period until the operation of taking out or inserting the suction cassette ends.

This eliminates the need to operate the power switch 50 each time.

By the way, the above-described valve 17 connects the compression pump 14 and the air cylinder 15 in the ON state as shown in FIGS. On the other hand, in the OFF state, the air cylinder 15 is connected to the atmosphere. Similarly, when the valve 13 is ON, the vacuum pump
Connect 10 to vacuum pad 11. On the other hand, in the OFF state, the vacuum pad 11 is connected to the atmosphere side.

[Operation] [Insertion of Suction Cassette 8] First, when the suction cassette 8 in FIG.
The vacuum cassette 11 pulls the suction cassette over the spring 18.

[Setting of Suction Cassette 8] When the suction cassette 8 comes to the set position in FIG. 2, the switch 6 is turned on, and the signal of the switch 6 activates the voltage supply unit 51 via the timer 53. After the valve 17 is turned off, the valve 13 is turned off. Then, the air cylinder 15 operates, and the piston 15 is moved to the hook 40 in the suction cassette 8.
b falls by the force of the spring 15 and its own weight, and holds the suction cassette 8.

Then, the decompressed air in the vacuum pad 11 is
It is released to the atmosphere by 13. Thereby, the pad 11 can be separated from the suction cassette 8.

Also, the connecting portion 40a of the suction cassette 8 and the connecting portion 2 in the main body 1 are connected.
2 is closed, and the air decompressed from the vacuum controller 5 is guided to the suction cassette 8. In this state, the suction object W can be suctioned by the vacuum control unit 5.

[Removal of Suction Cassette 8] The suction object W is sucked from the eyeball (not shown) into the storage unit 30 via the passage 31. When the suction cassette 8 is taken out after the suction is completed, the switch 7 for taking out the suction cassette is turned ON as shown in FIG. Then switch 7
The valve 17 is turned on by the signal of (1), compressed air enters the air cylinder, raises the piston 15b and separates from the hook portion 40 of the suction cassette 8. At the same time, the suction cassette 8 is forcibly taken out of the main body 1 by the spring 18 of the pushing mechanism 4. When a certain period of time has passed since the removal switch 7 was turned on, the valve 13 is turned on, and the next suction cassette 8 can be put in.

Since the timer 53 shown in FIG. 4 is provided, the suction cassette is pulled in and pushed out not only when the power switch 50 is turned on, but also when the power switch 50 is turned off.
The operation can be performed by operating the voltage supply unit 51 for a certain period of time.

Other Embodiments The holding mechanism may use a solenoid instead of an air cylinder.

The air cylinder is not limited to a type in which compressed air is used to raise the piston and the piston is lowered by a spring when the compressed air is removed, or a type in which compressed air is used to lower the piston and the piston is raised by a spring when the compressed air is removed. Alternatively, the piston may be moved up and down by alternately introducing compressed air without a built-in spring.

The pushing mechanism is not limited to a mechanism using a spring, but may be a mechanism using a solenoid or a motor.

What sends the decompressed air to the vacuum pad may use not only a vacuum pump but also a device for creating a vacuum from compressed air.

Switch 6 for checking whether the suction cassette is inserted
May be a switch using light as well as a mechanical one.

The suction cassette is not limited to one bottle, but may be a bottle having two or more bottles.

The valves 17 and 13 pass through when turned on and open to the atmosphere when turned off. On the other hand, the valves 17 and 13 may be open to the atmosphere when turned on and pass when turned off.

The vacuum pump for sending the vacuum to the vacuum pad and the vacuum pump for sending the vacuum to the pressure adjusting unit may be different or one vacuum pump may be used.

The retraction mechanism is not limited to the one using a vacuum pump and a vacuum pad, but may be one that uses a solenoid, a motor, or the like to hook the cassette and pulls it in, or a robot arm that grabs and pulls the cassette. As a member indicating the state of the suction cassette, a buzzer or the like can be used in addition to the display.

According to the first aspect of the present invention, when the suction cassette is retracted, the suction cassette is forcibly retracted to the set position using the reduced pressure of the vacuum control unit. Can be easily inserted without the need to exert strong power.

According to the second aspect of the present invention, as in the first aspect, a force for sealing the suction cassette and the main body can be easily entered without requiring any force.
Moreover, the suction force cassette can be securely held on the main body. That is, the suction cassette does not come off from the main body during the ophthalmic operation, and the operation is safe.

According to the third aspect of the present invention, when removing the suction cassette, the suction cassette can be forcibly and easily pushed out using mechanical force.

According to the fourth aspect of the present invention, the state can be read and indicated by the switch without checking to confirm whether the suction cassette is properly inserted or not, so that the confirmation is easy.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 shows a state in which a suction cassette is about to be pulled into a main body, and FIG. 2 shows a state in which the suction cassette is set in the main body. FIG. 3 is a diagram showing a state where the suction cassette is about to be pushed out of the main body, and FIG. 4 is a diagram showing a control device. DESCRIPTION OF SYMBOLS 1 ... Main body 2 ... Retraction mechanism 3 ... Holder mechanism 4 ... Extrusion mechanism 5 ... Vacuum controller 6, 7 ... Switch 8 ... Suction switch

Claims (4)

(57) [Claims] 1. A suction device for sucking an object to be suctioned by reducing pressure, a main body, a suction cassette detachable from the main body and having a storage section for the object to be suctioned, and a suction cassette for sucking the object to be suctioned into the suction cassette. A vacuum control unit, and a retracting mechanism for retracting the suction cassette into the main body when the suction cassette is mounted, wherein the retracting mechanism is configured to retract the suction cassette by using the reduced pressure of the vacuum control unit. A suction device characterized by being performed. 2. The suction device according to claim 1, further comprising: a holding mechanism for holding the suction cassette in the main body; and a pushing mechanism for pushing out the suction cassette from the main body. 3. The suction device according to claim 2, further comprising: a pushing mechanism for pushing out the suction cassette from the main body; and a holding mechanism for holding the suction cassette in the main body, wherein the pushing mechanism includes a spring. A suction device, wherein the holding mechanism is formed by a compression pump and an air cylinder, and the drawing mechanism is formed by a vacuum pump and a vacuum pad. 4. The suction device according to claim 1, further comprising a switch for confirming whether or not the suction cassette is inserted in the main body, and a member for indicating a state of the suction cassette by the contents of the switch. Suction device.