JP2019062934A - Ophthalmic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmic apparatus capable of easily rotating a measurement head around an eyeball rotation axis of an eye to be inspected. An ophthalmic apparatus in which a measuring head is suspended by a drive mechanism. The rotation drive unit 30 of the drive mechanism includes an installation member 31 that can be moved in the vertical and horizontal directions by the vertical drive unit and the horizontal drive unit, and a rotation member 32 that is movably provided therein and to which the measurement head is fixed. The rotating member 32 has a guide groove 43 extending in an arc shape centered on a rotation center 37 set on the outside of the rotating drive unit 30, and the rotating member 32 is driven when the drive device (33) is driven. , Guided by the guide groove 43 and the guide protrusion 36 passed through the guide groove 43, and moved in the rotation direction about the rotation center 37. [Selection diagram] Fig. 3

Description

  The present disclosure relates to an ophthalmologic apparatus.

  It is considered desirable for the subject's eye to acquire information in the same binocular vision condition as normal. Therefore, there is an ophthalmologic apparatus that acquires information of an eye to be examined in a binocular vision state (see, for example, Patent Document 1).

  This ophthalmologic apparatus is provided with a pair of main body units movably in the X, Y, and Z directions corresponding to the left and right eyes on a drive mechanism box on an optometry table. In the ophthalmologic apparatus, an eye information acquisition unit is provided in each of the two main body units, and by driving the respective eye information acquisition units while setting the two body units in an appropriate posture with respect to both eyes, binocular vision can be obtained. Information of the eye to be examined can be acquired in the state.

WO 2003/041571

  Here, in the ophthalmologic apparatus, the main body provided with the eye information acquisition unit is rotatable around the eyeball rotation axis of the eye to be examined. However, in the ophthalmologic apparatus, the main body is attached to a support extending upward from the drive mechanism box, and the support is movable and rotatable in the XYZ directions. For this reason, in order to rotate the main body about the eyeball rotation axis of the eye to be examined, the ophthalmologic apparatus needs to rotate the post in the horizontal direction and appropriately rotate it according to the position of the movement. This complicates the configuration and control for rotating the main body about the eyeball rotation axis of the subject's eye.

  The present disclosure has been made in view of the above circumstances, and provides an ophthalmologic apparatus capable of easily rotating a measurement head provided with an eye information acquisition unit about an eyeball rotation axis of an eye to be examined. With the goal.

  In order to solve the problems described above, an ophthalmologic apparatus according to the present disclosure includes a measurement head that houses an eye information acquisition unit that acquires eye information of an eye to be examined, and a drive mechanism that suspends and supports the measurement head movably And the drive mechanism includes a vertical drive unit for moving in the vertical direction, a horizontal drive unit for moving in the horizontal direction, and a rotation drive unit for rotating around the eyeball rotation axis of the eye to be examined. The rotation drive unit is provided so as to be movable with respect to the installation member and the installation member movable in the vertical direction and the horizontal direction by the vertical drive unit and the horizontal drive unit, and the measurement head is fixed. A convoluting member and a drive device for moving the convoluting member, the convoluting member has a guide groove extending in an arc shape centered on a rotation center set outside the convoluting drive unit, The installation member is in front The guide member has a guide projection that protrudes toward the convoluting member and passes through the guide groove, and when the drive device is driven, the convoluting member is guided by the guide groove and the guide protrusion to make the center of rotation It is characterized in that it is moved in a rotational direction about the center.

  According to the ophthalmologic apparatus of the present disclosure, the measurement head provided with the eye information acquisition unit can be easily rotated about the eyeball rotation axis of the eye to be examined.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the whole structure of the ophthalmologic apparatus of Example 1 as an example of the ophthalmologic apparatus which concerns on this indication. It is a block diagram which shows the structure of the control system of an ophthalmologic apparatus. It is explanatory drawing which shows the structure of the rotation drive part of a drive mechanism. It is explanatory drawing explaining a mode that a rotation drive part moves. It is explanatory drawing which shows the structure of the convoluted drive part of the drive mechanism of another example.

  Hereinafter, embodiments of an ophthalmologic apparatus according to the present disclosure will be described with reference to the drawings.

An ophthalmologic apparatus 10 of Example 1 as one embodiment of an ophthalmologic apparatus according to the present disclosure will be described with reference to FIGS. 1 to 5. First, the overall configuration of the ophthalmologic apparatus 10 of the first embodiment will be described.
"overall structure"

  The ophthalmologic apparatus 10 is a binocular open type ophthalmologic apparatus that acquires information of the subject's eye E simultaneously in a state where the subject opens the left and right subject eyes E (see FIG. 4) as shown in FIG. It is. The ophthalmologic apparatus 10 includes a base 11, an optometry table 12, a support 13, an arm 14, a drive mechanism 15, and a pair of measurement heads 16. In the ophthalmologic apparatus 10, information of the eye to be examined E is acquired in a state in which the subject directly facing the optometry table 12 is in contact with the forehead portion 17 provided between the two measurement heads 16. In the following description, when viewed from the subject, the horizontal direction is the X direction, the vertical direction (vertical direction) is the Y direction, and the direction orthogonal to the X direction and the Y direction (the depth direction of the measurement head 16 Let the near side be the Z direction.

  The optometry table 12 is a desk for placing an examiner's controller 25 and a subject's controller 26 described later and placing a unit used for optometry, and is supported by the base 11. The optometry table 12 may be supported by the base 11 so that the position (height position) in the Y direction can be adjusted. The support 13 is supported by the base 11 so as to extend in the Y direction at the rear end of the optometry table 12, and an arm 14 is provided at the tip. The arm 14 suspends both measurement heads 16 via the drive mechanism 15 on the optometry table 12 and extends in the Z direction from the support 13 toward the near side. The arm 14 is movable in the Y direction with respect to the support 13. The arm 14 may be movable in the X direction and the Z direction with respect to the column 13. The measuring head 16 is supported at the tip of the arm 14 by being suspended by a drive mechanism 15. Therefore, the support post 13 and the arm 14 extend upward from the optometry table 12 and function as a support arm provided with the drive mechanism 15 at the tip.

  The measuring heads 16 are provided in pairs so as to correspond individually to the left and right subject eyes E of the subject, and in the following description, the measuring head 16L for the left eye and the measuring head 16R for the right eye are separately described. Do. The left-eye measurement head 16L acquires information on the subject's left eye E to be examined, and the right-eye measurement head 16R acquires information on the subject's right eye E. The left-eye measurement head 16L and the right-eye measurement head 16R are configured to be plane-symmetrical with respect to a vertical plane located between the two in the X direction. In each measurement head 16, a deflection member 18 is provided, and information of the corresponding eye E is acquired by an eye information acquisition unit 21 described later through the deflection member 18. For this reason, in the ophthalmologic apparatus 10, the information of the to-be-tested eye E of the to-be-tested eye E can be simultaneously acquired in a state which test subject open | released both eyes.

  In each measurement head 16, an eye information acquiring unit 21 (obtaining individually as a right eye information acquiring unit 21R and a left eye information acquiring unit 21L (see FIG. 2) for acquiring eye information of the eye E) It is housed. The eye information includes the image of the eye E, the image of the fundus of the eye E, the tomographic image of the retina of the eye E, the corneal endothelium image of the eye E, the refractive power of the eye E, the eye It refers to the corneal shape of E, the intraocular pressure of the eye E to be examined, and the like. Each eye information acquisition unit 21 measures the refractive power, the visual acuity inspection device which performs visual acuity inspection while switching the target to be presented, the phoropter which acquires the appropriate corrective refractive power of the eye E by switching and arranging the corrective lenses Reflector, wavefront sensor, fundus camera for capturing an image of the fundus, tomographic imaging apparatus (OCT) for capturing a tomographic image of retina, specular microscope for capturing a corneal endothelium image, keratometer for measuring a corneal shape, intraocular pressure The tonometer etc. which measure are comprised combining single or multiple.

  Each eye information acquisition unit 21 is provided with an optical system such as a fixation projection system, an observation system, an alignment detection system, and a measurement system, and each optical system is appropriately provided with a light source, a sensor, a drive unit and the like. The fixation projection system presents a fixation target to the eye E to be examined and fixes the visual axis of the eye E to be examined. The observation system photographs the anterior segment of the eye E and displays the image (observation image) on a display unit, a connected external device, or the like. This makes it possible to check the state of the eye E and to obtain alignment information in the direction (X and Y directions) orthogonal to the optical axis based on the reference point (pupil, iris, etc.) in the image and the projected target image. Make it possible. The alignment detection system acquires alignment information in the optical axis direction (Z direction (working distance direction)) of each eye information acquisition unit 21 and alignment information in the XY directions. The alignment information is information used for alignment (alignment) of the eye information acquisition unit 21 with the eye E. The measurement system irradiates the eye E with a light flux for acquiring the eye characteristic of the eye to be inspected E, and acquires the eye characteristic by receiving the reflected light.

  Both measuring heads 16 are movably suspended by a drive mechanism 15 provided at the tip of the arm 14. In the first embodiment, as shown in FIG. 2, the drive mechanism 15 includes a left vertical drive 22L, a left horizontal drive 23L, and a left turn drive 30L corresponding to the left-eye measurement head 16L, and a right-eye measurement head. The right vertical drive unit 22R, the right horizontal drive unit 23R, and the right rotation drive unit 30R corresponding to 16R are provided. The configuration of each drive unit corresponding to the left-eye measurement head 16L and the configuration of each drive unit corresponding to the right-eye measurement head 16R are plane symmetric with respect to the vertical plane located between them in the X direction. It is set as a structure, and it only describes as the vertical drive part 22, the horizontal drive part 23, and the rotation drive part 30, except the time mentioned separately. In the drive mechanism 15, the vertical drive unit 22, the horizontal drive unit 23, and the rotation drive unit 30 are provided in order from the top, and the corresponding measurement head 16 is moved with respect to the arm 14.

  The vertical drive unit 22 is fixed to the tip of the arm 14 and moves the horizontal drive unit 23 in the Y direction (vertical direction) with respect to the arm 14. The horizontal drive unit 23 is fixed to the vertical drive unit 22 and moves the rotation drive unit 30 in the horizontal direction, that is, the X direction and the Z direction with respect to the vertical drive unit 22. The vertical drive unit 22 and the horizontal drive unit 23 are, for example, an actuator that generates a driving force such as a pulse motor, and a transmission mechanism that transmits a driving force such as a combination of gears or a rack and pinion. It is provided and configured. The horizontal drive unit 23 can be easily configured and control of movement in the horizontal direction can be facilitated, for example, by separately providing a combination of an actuator and a transmission mechanism in the X direction and the Z direction.

  The rotation driving unit 30 is fixed to the horizontal driving unit 23, and rotates the measurement head 16 corresponding to the horizontal driving unit 23 around the rotation axis of the corresponding eye E. The configuration of the rotation drive unit 30 will be described in detail later. Thus, the drive mechanism 15 can move the measurement heads 16 in the X direction, the Y direction, and the Z direction individually or in conjunction with each other, and can rotate the eye E around the eye rotation axis. it can.

  The base 11 is provided with a control unit 24 that integrally controls the respective units of the ophthalmologic apparatus 10 in a control box (see FIG. 1). As shown in FIG. 2, the control unit 24 is added to the eye information acquisition unit 21 described above, each vertical drive unit 22 as the drive mechanism 15, each horizontal drive unit 23, and each rotation drive unit 30, The controller 25 for the examiner, the controller 26 for the examinee, and the storage unit 27 are connected. In the ophthalmologic apparatus 10, power is supplied from the commercial power supply to the control unit 24, and the control unit 24 supplies power to the drive mechanism 15 and the eye information acquisition unit 21. The examiner controller 25 is used by the examiner to operate the ophthalmologic apparatus 10. The subject controller 26 is used by the subject to respond when acquiring various types of eye information of the subject eye E. The control unit 24 is connected to the examiner's controller 25 and the subject's controller 26 via a wired or wireless communication path. The control unit 24 develops the program stored in the connected storage unit 27 or the built-in internal memory 24 a onto, for example, a RAM (Random Access Memory), thereby appropriately performing the controller 25 for the examiner or the controller 26 for the subject. In accordance with the operation, the operation of the ophthalmologic apparatus 10 is comprehensively controlled. In the first embodiment, the internal memory 24a is configured by a RAM or the like, and the storage unit 27 is configured by a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM) or the like.

The ophthalmologic apparatus 10 automatically performs alignment under the control of the control unit 24 to acquire eye information of the eye to be examined E. Specifically, the control unit 24 operates the eye information acquisition unit 21 (its alignment detection system) and the drive mechanism 15 (the vertical drive unit 22, the horizontal drive unit 23, and the rotation drive unit 30) to operate as described above. Alignment in the X, Y, and Z directions of the eye information acquisition unit 21 (measuring head 16) with respect to the corresponding eye E based on the alignment information from the above. Thereafter, the control unit 24 appropriately drives the eye information acquisition unit 21 to acquire various eye information of the eye E to be examined. In the ophthalmologic apparatus 10, the eye information acquiring unit 21 is aligned with the eye E to be examined by operating the controller 25 for the examiner manually, that is, the examiner operates the eye information acquiring unit 21 to perform various operations on the eye E to be examined. Can obtain eye information of In the ophthalmologic apparatus 10, when acquiring various kinds of eye information of the eye E to be examined, the subject can respond by operating the controller 26 for the person to be examined, and acquisition of various kinds of eye information of the eye E to be examined Assist.
(Circulating drive unit)

  Next, the configuration of the rotation drive unit 30 of the drive mechanism 15 in the ophthalmologic apparatus 10 will be described. As shown in FIG. 3 and FIG. 4, the convoluted drive unit 30 is configured by providing the convoluted member 32 and the convoluted drive motor 33 on the installation member 31. The installation member 31 is configured by bending a plate-like member into an L-shaped cross section, and includes an installation plate portion 34 extending in the horizontal direction and a mounting plate portion 35 extending in the vertical direction from there. The mounting plate portion 34 is provided with a convoluted member 32 and a convoluted drive motor 33. The mounting plate portion 35 is fixed to the horizontal drive unit 23. Therefore, the installation member 31 is movable in the Y direction (vertical direction) and in the X direction and the Z direction (horizontal direction) with respect to the arm 14 by the vertical drive unit 22 and the horizontal drive unit 23. .

  The mounting plate portion 34 is provided with a pair of guide protrusions 36 so as to protrude in the Y direction, ie, the direction in which the turning member 32 is provided. The two guide projections 36 are in the shape of a cylinder having a size that can be fitted into a guide groove 43 described later. In the installation member 31, a rotation center 37 extending in the Y direction is set on the outer side of the rotation driving unit 30 on the subject side in the Z direction. As described above, the rotational center 37 has a positional relationship that coincides with the rotational axis of the eye E when the eye information acquisition unit 21 (measurement head 16) is aligned in the XYZ directions with respect to the eye E (See Figure 4). The axes of both guiding projections 36 are located on a circular arc whose center is the rotation center 37 and whose radius is a predetermined distance d1 (see FIG. 4).

  The convoluting member 32 is formed by bending a plate-like member into a U-shaped cross section, and a guide plate portion 38 extending in the horizontal direction, a connecting plate portion 39 extending downward from the vertical direction therefrom, and the horizontal direction therefrom And an extending fixing plate portion 41. The guide plate portion 38 has a predetermined distance d2 (d2> d1 (see FIG. 4)) around the rotation center 37 with the outer edge 38a on the side of the rotation drive motor 33 (the side opposite to the subject in the Z direction). It is assumed to be along the arc of the radius. The outer peripheral portion 38a is provided with a rotation side gear portion 42. The rotation side gear portion 42 is capable of meshing with a drive side gear portion 46 of a rotation rotation output shaft 45 described later of the rotation rotation drive motor 33.

  Further, the guide plate portion 38 is provided with a guide groove 43. The guide groove 43 is formed such that the outer inner edge portion 43a and the inner inner edge portion 43b are radially connected by the both end edges 43c. The outer inner edge portion 43a is formed along an arc whose radius is a predetermined distance d3 (d1 <d3 <d2 (see FIG. 4)) about the rotation center 37 set by the guide plate portion 38. The inner inner edge portion 43b is formed along an arc whose radius is a predetermined distance d4 (d4 <d1 (see FIG. 4)) with the rotation center 37 as a center. The predetermined interval d3 and the predetermined interval d4 are set such that the predetermined interval d1 is an intermediate value. For this reason, the guide groove 43 is positioned on a circumference centered on the same rotation center 37 as the outer edge portion 38a provided with the rotation side gear portion 42 (describing a circular arc), and the outer edge portion 38a is located It is assumed to be located on the circumference of a radius of curvature (predetermined distance d1) smaller than the circumference (the radius of curvature is a predetermined distance d2). The guide groove 43 is capable of receiving each of the guide projections 36 provided on the installation plate portion 34 in contact with the outer inner edge portion 43a and the inner inner edge portion 43b. It is possible to make contact with the outer peripheral surface of the projection 36.

  In the guide plate portion 38, a pair of guide protrusions 36 provided on the installation plate portion 34 is passed through the guide groove 43. The guide plate portion 38 can move relative to the mounting plate portion 34 along the direction in which the guide groove 43 extends, that is, the arc drawn by the guide groove 43, by the guiding action of the guide groove 43 and the two guide projections 36. It is provided on the mounting plate portion 34. Thus, the guide plate portion 38 can be moved relative to the mounting plate portion 34 in a rotational direction about the rotation center 37 which is the center of the arc drawn by the guide groove 43.

  The connecting plate portion 39 connects the guide plate portion 38 and the fixing plate portion 41. The fixing plate portion 41 is a plate shape extending from the connecting plate portion 39 in the first embodiment at a point fixed to the corresponding measuring head 16 and relative rotation is prevented on the upper surface of the corresponding measuring head 16 It is fixed in the

  The rotation drive motor 33 functions as a drive device in the rotation drive unit 30, and has a motor main body 44 and a rotation output shaft 45 extending therefrom. The rotary drive motor 33 rotates the rotary output shaft 45 about its axis by driving the motor main body 44 under the control of the control unit 24. On the outer peripheral surface of the turning output shaft 45, a driving side gear portion 46 which can be engaged with the turning side gear portion 42 of the guide plate portion 38 is provided. The motor main body 44 is fixed to the mounting plate portion 34 of the installation member 31 in a state in which the drive side gear portion 46 of the rotation output shaft 45 is engaged with the rotation side gear portion 42 of the guide plate portion 38 Are provided. The turn output shaft 45 and the guide plate portion 38 function as a worm gear that converts the rotational force of the turn output shaft 45 into a rotational force that causes the guide plate portion 38 to rotate around the rotation center 37. Therefore, the rotary drive motor 33 is driven under the control of the control unit 24 to move the guide plate portion 38 along the arc drawn by the guide groove 43. Thus, the rotary drive unit 30 moves the measuring head 16 fixed to the fixed plate portion 41 in the rotational direction about the rotation center 37 with respect to the horizontal drive unit 23 to which the mounting plate portion 35 is fixed. be able to.

  The drive mechanism 15 is set by the rotation drive unit 30 by performing alignment in the X, Y, and Z directions of the eye information acquisition unit 21 (measurement head 16) with the eye E with the vertical drive unit 22 and the horizontal drive unit 23 as described above. The rotation center 37 coincides with the eyeball rotation axis of the eye E. In this state, the drive mechanism 15 moves the convoluting member 32 (the guide plate portion 38) in the rotational direction about the rotation center 37 in this state, so that the convoluting member 32 (the fixed plate portion 41) The fixed measuring head 16 can be rotated about the eyeball rotation axis of the corresponding eye E to be examined. At this time, the rotation driving unit 30 rotates the measurement target eye 16L and the right-eye measurement head 16R in the opposite direction to cause the eye E to diverge (dispersion movement) or converge (convergence movement). It can be done. Thereby, the ophthalmologic apparatus 10 performs a test of diversion exercise and convergence exercise, or performs a distance examination and a near examination in the state of binocular vision to acquire various eye information of both eye E to be examined. Can.

  The ophthalmologic apparatus 10 of the ophthalmologic apparatus according to the first embodiment of the present disclosure can obtain the following effects.

  The ophthalmologic apparatus 10 allows the installation member 31 to be moved in the vertical direction and the horizontal direction by the vertical drive unit 22 and the horizontal drive unit 23 in the rotation drive unit 30, and the guide protrusion 36 protruding from the installation member 31 is the rotation member 32. Through the guide groove 43 of the The ophthalmologic apparatus 10 is guided by the guide groove 43 and the guide projection 36 when the rotation drive motor 33 is driven in the rotation drive unit 30, and the rotation member 32 moves in the rotation direction about the rotation center 37 Let Here, the ophthalmologic apparatus 10 is configured to be able to move the convoluting member 32 in the rotation direction about the rotation center 37 set on the outside of the convoluting drive unit 30. Is fixed. Therefore, when the ophthalmologic apparatus 10 causes the vertical drive unit 22 and the horizontal drive unit 23 to align the rotation center 37 of the rotation drive unit 30 with the eyeball rotation axis of the eye E, the vertical drive unit 22 and the vertical drive unit 22 thereafter. The measurement head 16 can be rotated about the eyeball rotation axis by driving only the rotation drive unit 30 without driving the rotation axis. As a result, the ophthalmologic apparatus 10 can rotate the measuring head 16 about the eyeball rotation axis with a simple configuration and a simple control of driving only the rotation drive unit 30.

  In the ophthalmologic apparatus 10, in the convoluted member 32, the convoluted gear portion 42 is provided at the outer edge 38a centered on the rotation center 37 set outside the convoluted drive unit 30, and the guide groove 43 has a curvature smaller than the outer edge 38a. As a radius, it is assumed to extend in an arc shape centered on the rotation center 37. Then, in the ophthalmologic apparatus 10, when the rotary drive motor 33 is driven in which the drive side gear 46 provided on the rotary output shaft 45 is engaged with the rotary side gear 42 in the rotary drive 30, the guide groove 43 and the guide Guided by the projection 36, the convoluting member 32 is moved in the direction of rotation about the rotation center 37. Therefore, the ophthalmologic apparatus 10 can move the convoluting member 32 in the rotational direction about the rotation center 37 with a simple configuration and appropriately.

  In the ophthalmologic apparatus 10, a plurality (two in the first embodiment) of guide projections 36 are provided on the installation member 31 of the rotation drive unit 30 at intervals on the circumference centered on the rotation center 37. For this reason, in the ophthalmologic apparatus 10, the guiding protrusion 36 cooperates with the guiding groove 43 to move the turning member 32 (measuring head 16) in the rotational direction about the rotation center 37 (eyeball rotation axis of the eye E to be examined). It is possible to prevent the movement and rotation of the convoluting member 32 in an unintended direction.

  In the ophthalmologic apparatus 10, since the drive mechanism 15 suspends and movably supports the measurement head 16, there is no need to position the drive mechanism 15 in front of the subject, and movement in the XYZ directions is possible. A space can be provided in front of the subject to prevent the subject from feeling a sense of pressure.

  The ophthalmologic apparatus 10 is provided with a pair of measurement heads 16 corresponding to the left and right eyes E, and corresponds to the left and right measurement heads 16 with the vertical drive unit 22, the horizontal drive unit 23, and the rotation drive unit 30. It is provided in pairs. For this reason, the ophthalmologic apparatus 10 can acquire the eye information of each subject eye E in the state of binocular vision. In addition, the ophthalmologic apparatus 10 performs a test of distraction movement and convergence movement only by driving only the rotation driving unit 30, and performs a far vision inspection and a near vision inspection using both of the measurement heads 16 to perform the both subject Various eye information of the optometry E can be acquired.

  The ophthalmologic apparatus 10 includes an ophthalmoscope table 12 with which a subject is faced, a support 13 as a support arm extending upward from there, and an arm 14, and a drive mechanism 15 is provided at the tip of the support arm. For this reason, it is not necessary to provide the drive mechanism 15 on the optometry table 12, and a controller for the examiner or a subject uses the controller for the examiner or the examinee (controller for the examiner 25). , And can be used as a place for the controller 26) for a subject.

  Therefore, in the ophthalmologic apparatus 10 as one embodiment of the ophthalmologic apparatus according to the present disclosure, the measurement head 16 provided with the eye information acquisition unit 21 can be easily rotated about the eyeball rotation axis of the eye E to be examined. .

  As described above, the ophthalmologic apparatus of the present disclosure has been described based on the first embodiment, but the specific configuration is not limited to the first embodiment, and does not deviate from the gist of the invention according to each claim. As long as design changes and additions are permitted.

  For example, in the first embodiment, the two guiding projections 36 are provided on the setting member 31 of the rotation driving unit 30 at intervals on the circumference centering on the rotation center 37. However, the guiding projection 36 can move the turning member 32 (measuring head 16) in the direction of rotation about the rotation center 37 (eyeball rotation axis of the subject eye E) in cooperation with the guiding groove 43. The configuration is not limited to that of the first embodiment as long as it can prevent movement and rotation of the convoluting member 32 in unintended directions. As another example, for example, as shown in FIG. 5, the guiding protrusion 36A may be configured by a single member curved along a circumference centered on the rotation center 37. Three or more guiding projections 36 may be provided.

  In the first embodiment, the installation member 31 of the rotation drive unit 30 is fixed to the horizontal drive unit 23. However, the installation member 31 may be fixed to the vertical drive unit 22 as long as the installation member 31 can be moved in the vertical direction and the horizontal direction by the vertical drive unit 22 and the horizontal drive unit 23. It is not limited to the configuration of Example 1.

  Furthermore, in the first embodiment, the convoluted member 32 of the convoluted drive unit 30 includes the guide plate portion 38, the connecting plate portion 39, and the fixed plate portion 41. However, as long as the convoluting member 32 can be moved in the rotational direction about the rotation center 37 by the guiding action of the guiding groove 43 and the guiding projection 36, and the measuring head 16 is fixed, Other configurations may be used, and the configuration is not limited to that of the first embodiment.

  In the first embodiment, the rotation output shaft 45 and the guide plate portion 38 are configured as a worm gear in order to transmit the driving force from the drive device (the rotation driving motor 33) to the rotation member 32. However, the drive device (rotation drive motor 33) may be any other configuration as long as it moves the rotation member 32 in the rotational direction guided by the guide groove 43 and the guide protrusion 36 when driven. It is not limited to the configuration of.

  DESCRIPTION OF SYMBOLS 10 Ophthalmic apparatus 12 Table 13 for optometrists 13 (A support arm as an example is comprised.) Support rod 14 (A support arm as an example is comprised.) Arm 15 Drive mechanism 16 Measurement head 21 Eye information acquisition part 22 Vertical drive part 23 Horizontal Drive 30 rotation drive 31 installation member 32 rotation member 33 rotation drive motor 36 (as an example of drive device) guide projection 37 rotation center 38 a outer edge 42 rotation side gear 43 guide groove 45 rotation output shaft 46 drive gear E Eye to be examined

Claims (6)

A measuring head that accommodates an eye information acquisition unit that acquires eye information of an eye to be examined;
And a drive mechanism for suspending and movably supporting the measurement head,
The drive mechanism includes a vertical drive unit for moving in the vertical direction, a horizontal drive unit for moving in the horizontal direction, and a rotation drive unit for rotating around the eyeball rotation axis of the eye to be examined.
The rotation drive unit is provided so as to be movable with respect to the installation member and the installation member movable in the vertical direction and the horizontal direction by the vertical drive unit and the horizontal drive unit, and the measurement head is fixed. A rotating member, and a drive unit for moving the rotating member,
The convoluting member has a guide groove extending in an arc shape centered on a rotation center set on the outside of the convoluting drive unit,
The installation member has a guide projection which is projected toward the convoluting member and is passed through the guide groove;
When the drive device is driven, the convoluted member is guided by the guide groove and the guide protrusion and is moved in a rotational direction about the rotation center. The convoluting member has an outer edge along a circular arc centered on the rotation center and having a radius of curvature larger than that of the outer edge, and a convoluted gear provided on the outer edge.
The ophthalmologic apparatus according to claim 1, wherein the driving device includes a driving side gear portion fixed to the installation member and engaged with the rotation side gear portion.   The ophthalmologic apparatus according to claim 1 or 2, wherein a plurality of the guide protrusions are provided at intervals along a circumference centered on the rotation center.   The ophthalmologic apparatus according to claim 1 or 2, wherein the guide protrusion is a single member along a circumference centered on the rotation center. The measurement heads are provided in pairs corresponding to the left and right subject eyes,
The vertical drive unit, the horizontal drive unit, and the rotary drive unit are provided in pairs corresponding to the left and right measurement heads, any one of claims 1 to 4 The ophthalmologic apparatus according to any one of the preceding claims. An ophthalmic apparatus according to any one of claims 1 to 5, wherein
Furthermore, it has a table for optometry which a subject faces directly, and a support arm which extends upward from the table for optometry,
The ophthalmologic apparatus, wherein the drive mechanism is provided at the tip of the support arm.