JP4959249B2 - Ophthalmic equipment - Google Patents

Description

  The present invention relates to an ophthalmic apparatus.

  In an ophthalmologic apparatus that positions an ophthalmic unit with respect to the eye to be examined and performs ophthalmic operations such as measurement, examination, or treatment of the eye to be examined, the eye is fixed while the eye is fixed and the relative position to the eye to be examined is confirmed on the monitor Is moved and positioned with respect to the eye to be examined.

  Patent Document 1 discloses an ophthalmologic apparatus in which an ophthalmologic apparatus unit moves up and down when the ophthalmologic unit moves back and forth and left and right according to the tilt angle of the joystick handle in the front and rear and left and right directions, and is rotated so as to twist the joystick handle. Has been.

In the ophthalmologic apparatus of Patent Literature 1, in order to move the ophthalmic unit up and down, an operation that is difficult to be directly connected to the vertical movement is required in the human sense of twisting the handle of the joystick. There was a problem of not.
JP 2002-136480 A

  Then, in view of the said problem, this invention makes it a subject to provide the ophthalmologic apparatus with which positioning of an ophthalmologic unit is easy.

In order to solve the above problems, according to the present invention, an ophthalmologic apparatus for positioning an ophthalmic unit with respect to an eye to be examined has a joystick having a rotatable operation wheel at the top of the handle, A first operation mode in which the ophthalmic unit moves up, down, left and right with respect to the eye to be examined, and the ophthalmic unit approaches or separates from the eye with respect to the rotation of the operation wheel. The ophthalmic unit moves to the left and right with respect to the eye to be examined according to the left and right inclination of the handle, and the ophthalmic unit approaches or separates from the eye to be examined according to the front and back inclination of the handle, in accordance with the rotation of the operating wheel, and a second operating mode wherein the ophthalmic unit moves up and down relative to the subject's eye, the operating wheel can be pressed Ri, the joystick is provided with a switch for detecting the depression of the operating wheel, when the operation wheel is pressed, the ophthalmic unit shall initiate an ophthalmic operation.

According to this configuration, in the first operation mode, the ophthalmologic unit is positioned by the back-and-forth movement of the joystick handle and the back-and-forth movement of the operation wheel, so that the movement of the operation and the movement of the eye to be examined on the monitor are sensed. Are easy to match and positioning is easy. In addition, since an operator who is familiar with the non-intuitive operation of the conventional ophthalmic apparatus can operate in the second operation mode that is similar to the conventional ophthalmic apparatus, the ophthalmic apparatus can be updated smoothly. . Furthermore, an ophthalmic operation such as measurement or treatment can be started by pressing the operation wheel while keeping the appropriate position of the ophthalmic unit without removing the hand from the joystick.

  As described above, according to the present invention, since the ophthalmic unit is positioned by tilting the handle of the joystick and rotating the operation wheel, it is easy to match the human sense and the positioning operation is easy.

A preferred embodiment of the present invention will now be described with reference to the drawings.
FIG. 1 shows a tonometer 1 which is one embodiment of an ophthalmic apparatus according to the present invention. In the tonometer 1, an ophthalmologic unit 3 that performs intraocular pressure measurement (ophthalmic operation) and a face contact frame 4 on which a subject comes into contact with the face to fix the eye to be examined are supported by the apparatus body 2. The main body 2 is provided with a joystick 5 for positioning the ophthalmic unit 3 and a monitor 6 that displays an image of the eye to be examined captured by the camera of the ophthalmic unit 3.

  FIG. 2 shows details of the joystick 5. The joystick 5 has a handle 7 that can be tilted in the front-rear and left-right directions. The joystick 5 is provided at the top of the handle 7 so as to be rotatable in the front-rear direction and includes an operation wheel 8 that can be pressed toward the inside of the handle 7. Furthermore, the joystick 5 includes a front / rear tilt encoder 9 that detects the front / rear tilt angle of the handle 7, a left / right tilt encoder 10 that detects the left / right tilt angle of the handle 7, and a wheel rotation encoder that detects the rotation angle of the operation wheel 8. 11 and a press detection switch 12 that detects pressing of the operation wheel 8.

  FIG. 3 shows a configuration related to positioning of the ophthalmic unit 3 in the tonometer 1. The detection pulse signals of the wheel rotation encoder 11, the front / rear tilt encoder 9 and the left / right tilt encoder 10 of the joystick 5 are input to the control board 13, and the ophthalmologic unit 3 is moved in the front / rear direction, that is, in the direction of adjusting the distance to the eye to be examined. The front-rear positioning DC motor 14 to be moved, the vertical positioning DC motor 15 for moving the ophthalmic unit 3 up and down, and the left-right positioning DC motor 16 for moving the ophthalmic unit 3 left and right are driven.

  The control board 13 applies a DC voltage to the vertical positioning DC motor 15 when the front / rear tilt encoder 9 detects the front / rear tilt of the handle. Therefore, as shown in FIG. 4, the ophthalmic unit 3 moves according to the inclination of the handle 7. However, when the handle 7 is inclined forward, the ophthalmic unit 3 is raised, and the handle 7 is inclined backward. When it is, the ophthalmic unit 3 is lowered.

  At this time, the vertical positioning DC motor 15 is applied with a voltage proportional to the number of pulses generated by the front / rear tilt encoder 9, that is, the front / rear tilt angle of the handle 7 detected stepwise. Thereby, the vertical and horizontal movement speed of the ophthalmic unit 3 is proportional to the inclination angle of the handle 7.

  Further, when the left / right tilt encoder 10 detects the left / right tilt of the handle, the control board 13 applies a DC voltage to the left / right positioning DC motor 16 and the handle 7 is tilted as shown in FIG. The ophthalmic unit 3 is moved in the direction.

  The DC voltage applied to the left / right positioning DC motor 16 is proportional to the number of pulses generated by the left / right tilt encoder 10, that is, the tilt angle of the handle 7 detected stepwise, and the ophthalmic unit 3 moves up / down / left / right. The speed is proportional to the tilt angle of the handle 7.

  Further, the control board 13 receives a detection pulse output every time the operation wheel 8 rotates by a unit angle from the wheel rotation encoder 11, and applies a predetermined drive voltage of 100 msec to the front-rear positioning motor 14 each time. . Accordingly, as shown in FIG. 6, the ophthalmic unit 3 is moved in the same direction as the rotation direction of the operation wheel 8 by a distance proportional to the rotation angle of the operation wheel 8 to approach or separate from the eye to be examined. It is done.

  The tonometer 1 causes the ophthalmologic unit 3 to start measuring intraocular pressure when the press detection switch 12 detects that the operation wheel 8 is pressed.

  In the tonometer 1 according to the present invention, the ophthalmologic unit 3 causes the eye 7 to be examined by tilting the handle 7 of the joystick 5 in the direction in which the frame of the monitor 6 is desired to move with respect to the center of the eye to be examined displayed on the monitor 6. Move in the direction opposite the center. Although the vertical direction on the monitor 6 is the front-rear direction on the joystick 5, it can be equally recognized without a sense of incongruity in human sense. Therefore, the operator can intuitively operate the handle 7 of the joystick 5 while looking at the monitor 6 to make the ophthalmologic unit 3 face the eye to be examined.

  Moreover, the operator moves the ophthalmic unit 3 back and forth by rotating the operation wheel 8 after facing the ophthalmic unit 3 with respect to the eye to be examined, and performs focus adjustment for tonometry. Since the rotation direction of the operation wheel 8 and the movement direction of the ophthalmic unit 3 coincide with each other, the operator can also operate intuitively here, and positioning is easy.

  Furthermore, since the ocular pressure measurement is started immediately after the ophthalmic unit 3 is positioned by depressing the operation wheel 8, the subject moves and the position of the subject's eye is shifted, or the joystick 5 is moved by mistake. The intraocular pressure can be measured before it is lost.

  As described above, in the tonometer 1 of the present invention, the operator can position and measure the ophthalmologic unit 3 by intuitively operating the joystick 5 without taking his eyes off the monitor 6, and thus accurate in a short time. Measurement is possible.

  In the present invention, the moving direction of the ophthalmic unit 3 means the moving direction with respect to the eye to be examined confirmed on the monitor 6. For example, when the subject is on his back, the vertical movement of the ophthalmic unit 3 is It becomes a horizontal movement in the actual space, and the back-and-forth movement of the ophthalmic unit 3 becomes a vertical movement in the real space.

  In the tonometer 1 of the above embodiment, when the amount of forward and backward movement of the ophthalmic unit 3 is large and the amount of rotation of the operation wheel 8 is large, the faster the rotation speed of the operation wheel 8 is, that is, the wheel rotation. An acceleration process may be performed in which the pulse width of the drive voltage applied to the front / rear positioning motor 14 is increased as the pulse interval of the encoder 11 is shorter.

  Further, in the tonometer 1 of the above embodiment, the movement of the ophthalmic unit 3 according to the operation of the joystick 5 described above is set as the first operation mode, and in addition, the ophthalmic unit 3 is moved according to the front and rear inclination of the handle 7. You may provide the 2nd operation mode which moves back and forth and moves the ophthalmic unit 3 up and down according to rotation of an operation wheel.

  An operator who has been using a conventional ophthalmologic apparatus for many years and is proficient in moving the ophthalmic unit back and forth by tilting the handle back and forth selects, for example, the second operation mode from the menu displayed on the monitor 6. The tonometer 1 of the present invention can be operated by an operation method similar to a conventional ophthalmologic apparatus.

  In this way, by providing two types of operation modes, an operator who uses the ophthalmologic apparatus for the first time or an operator who is unskilled in the conventional ophthalmologic apparatus selects the first operation mode that can be operated intuitively by selecting the tonometer 1. Therefore, a skilled operator can measure the intraocular pressure with the operation feeling already mastered by selecting the second operation mode.

The perspective view of the ophthalmologic apparatus of one Embodiment of this invention. The partial cross section front view of the joystick of the ophthalmic apparatus of FIG. The block diagram of a positioning mechanism in the ophthalmic unit of the ophthalmic apparatus of FIG. The side view which shows the operation direction of the joystick for moving the ophthalmic unit of the ophthalmic apparatus of FIG. 1 up and down. The front view which shows the operation direction of the joystick for moving the ophthalmologic unit of the ophthalmologic apparatus of FIG. 1 right and left. The side view which shows the operation direction of the joystick for moving the ophthalmologic unit of the ophthalmologic apparatus of FIG. 1 back and forth.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tonometer (ophthalmology apparatus) 3 ... Ophthalmology unit 5 ... Joystick 6 ... Monitor 7 ... Handle 8 ... Operation wheel 9 ... Front / rear inclination encoder 10 ... Left / right inclination encoder 11 ... Wheel rotation encoder 12 ... Press detection switch

Claims (1)

An ophthalmic apparatus for positioning an ophthalmic unit with respect to an eye to be examined,
It has a joystick with a rotatable operation wheel at the top of the handle,
The ophthalmologic unit moves up, down, left, and right with respect to the front, back, left, and right inclination of the handle, and the ophthalmologic unit approaches or separates from the eye to be examined according to the rotation of the operation wheel. 1 operation mode,
The ophthalmic unit moves to the left and right with respect to the eye to be examined according to the right and left inclination of the handle, and the ophthalmic unit approaches or separates from the eye to be examined according to the front and rear inclination of the handle, A second operation mode in which the ophthalmic unit moves up and down with respect to the eye to be examined in response to rotation of an operation wheel ;
The operation wheel can be pressed,
The joystick includes a switch for detecting depression of the operation wheel,
The ophthalmologic apparatus , wherein the ophthalmologic unit starts an ophthalmic operation when the operation wheel is pressed .

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