JP6962766B2 - Ophthalmic equipment - Google Patents

Description

The present disclosure relates to ophthalmic devices.

It is considered desirable for the eye to be inspected to acquire information in the same binocular vision state as in normal times. For this reason, some ophthalmic devices acquire information on the eye to be inspected in the state of binocular vision (see, for example, Patent Document 1).

In this ophthalmic apparatus, a pair of main body portions are provided on a drive mechanism box on an optometry table so as to be movable in the XYZ directions corresponding to the left and right eyes to be inspected. The ophthalmic apparatus is provided with an eye information acquisition unit in each of the two main bodies, and by driving each eye information acquisition unit while keeping both main bodies in an appropriate posture for both eyes to be inspected, binocular vision can be obtained. Information on the eye to be inspected can be obtained in the state.

International Publication No. 2003/041571

Here, in the ophthalmic apparatus, the main body portion provided with the eye information acquisition portion can be rotated around the eyeball rotation axis of the eye to be inspected. However, in the ophthalmic apparatus, the main body is attached to a support column extending upward from the drive mechanism box, and the support column is movable in the XYZ direction and is rotatable. Therefore, in order to rotate the main body of the ophthalmic apparatus around the axis of rotation of the eyeball of the eye to be inspected, it is necessary to move the support column in the horizontal direction and appropriately rotate it according to the position of the movement. This complicates the configuration and control of rotating the main body about the rotation axis of the eyeball of the eye to be inspected.

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

In order to solve the above-mentioned problems, the ophthalmic apparatus of the present disclosure includes a measurement head that houses an eye information acquisition unit that acquires eye information of the eye to be inspected, and a drive mechanism that suspends and movably supports the measurement head. The drive mechanism includes a vertical drive unit that moves in the vertical direction, a horizontal drive unit that moves in the horizontal direction, and a rotation drive unit that rotates around the eyeball rotation axis of the eye to be inspected. The rotation drive unit is provided with an installation member that is movable in the vertical and horizontal directions by the vertical drive unit and the horizontal drive unit, and is provided so as to be movable with respect to the installation member, and the measurement head is fixed. It has a rotating member and a driving device for moving the rotating member, and the rotating member has a guide groove extending in an arc shape centered on a rotation center set on the outside of the rotating drive unit. The installation member has a guide protrusion that protrudes toward the rotating member and is passed through the guide groove, and when the driving device is driven, the rotating member is guided to the guide groove and the guide protrusion. It is characterized in that it is moved in the direction of rotation about the center of rotation.

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

It is explanatory drawing which shows the whole structure of the ophthalmic apparatus of Example 1 as an example of the ophthalmic apparatus which concerns on this disclosure. It is a block diagram which shows the structure of the control system of an ophthalmic apparatus. It is explanatory drawing which shows the structure of the rotation drive part of a drive mechanism. It is explanatory drawing explaining how the rotation drive part moves. It is explanatory drawing which shows the structure of the rotation drive part of the drive mechanism of another example.

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

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

As shown in FIG. 1, the ophthalmic apparatus 10 is a binocular open type ophthalmic apparatus that simultaneously acquires information on the eye E to be inspected with the left and right eyes E to be inspected (see FIG. 4) open. Is. The ophthalmic apparatus 10 includes a base 11, an optometry table 12, a support column 13, an arm 14, a drive mechanism 15, and a pair of measurement heads 16. In the ophthalmic apparatus 10, the subject facing the optometry table 12 acquires the information of the optometry E while the subject is in contact with the forehead portion 17 provided between the measurement heads 16. In the following, when viewed from the subject, the left-right direction is the X direction, the vertical direction (vertical direction) is the Y direction, and the directions orthogonal to the X direction and the Y direction (the depth direction of the measurement head 16 (the subject side). The front side)) is in the Z direction.

The optometry table 12 is a desk on which an examiner controller 25 and a subject controller 26, which will be described later, are placed, and an object used for optometry is placed, and is supported by a 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 column 13 is supported by a 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 on the optometry table 12 via a drive mechanism 15, and extends in the Z direction from the support column 13 toward the front side. The arm 14 is movable in the Y direction with respect to the support column 13. The arm 14 may be movable in the X direction and the Z direction with respect to the support column 13. Both measuring heads 16 are supported by being suspended by a drive mechanism 15 at the tip of the arm 14. Therefore, the support column 13 and the arm 14 extend upward from the optometry table 12 and function as a support arm portion provided with a drive mechanism 15 at the tip.

The measurement heads 16 are provided in pairs to individually correspond to the left and right eye Es of the subject, and will be referred to as the left eye measurement head 16L and the right eye measurement head 16R when individually described below. do. The left eye measurement head 16L acquires information on the subject's left eye to be inspected E, and the right eye measurement head 16R acquires information on the subject's right eye to be inspected E. The measurement head 16L for the left eye and the measurement head 16R for the right eye have a plane-symmetrical configuration with respect to the vertical plane located between the two in the X direction. Each measurement head 16 is provided with a deflection member 18, and information on the corresponding eye E to be inspected is acquired by the eye information acquisition unit 21 described later through the deflection member 18. Therefore, in the ophthalmology apparatus 10, information on the eye E to be examined can be acquired simultaneously for both eyes while the subject has both left and right eyes open.

Each measurement head 16 has an eye information acquisition unit 21 that acquires eye information of the eye to be inspected E (referred to as a right eye information acquisition unit 21R and a left eye information acquisition unit 21L when described individually (see FIG. 2)). It is contained. The eye information includes an image of the eye E to be inspected, an image of the fundus of the eye to be inspected E, a tomographic image of the retina of the eye to be inspected E, a corneal endothelial image of the eye to be inspected E, the refractive force of the eye to be inspected E, and the eye to be inspected. It refers to the shape of the cornea of E, the intraocular pressure of the eye to be inspected E, and the like. Each eye information acquisition unit 21 measures a low vision test device that performs a low vision test while switching the target to be presented, a phoropter that switches and arranges a correction lens to acquire an appropriate corrective refractive force of the eye E to be inspected, and a refractive force. Refractometer and wave surface sensor, fundus camera that captures images of the fundus, tomography device (OCT) that captures tomographic images of the retina, specular microscope that captures corneal endothelial images, keratometer that measures corneal shape, intraocular pressure A tonometer or the like for measuring the above is configured alone or in combination of two or more.

Each eye information acquisition unit 21 is configured to be provided with optical systems 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 an 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 to be inspected, and displays the image (observation image) on a display unit, a connected external device, or the like. This makes it possible to confirm the state of the eye E to be inspected, and to acquire alignment information in the direction orthogonal to the optical axis (XY direction) based on the reference point (pupil, iris, etc.) in the image and the projected optotype image. Is 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 direction. The alignment information is information used for alignment (alignment) with respect to the eye E to be inspected by each eye information acquisition unit 21. The measurement system irradiates the eye E to be inspected with a luminous flux for acquiring the eye characteristics of the eye E to be inspected, and receives the reflected light to acquire the eye characteristics.

Both measurement heads 16 are movably suspended by a drive mechanism 15 provided at the tip of the arm 14. In the first embodiment, the drive mechanism 15 includes a left vertical drive unit 22L, a left horizontal drive unit 23L, a left rotation drive unit 30L, and a right eye measurement head corresponding to the left eye measurement head 16L, as shown in FIG. It has a right vertical drive unit 22R, a right horizontal drive unit 23R, and a right rotation drive unit 30R corresponding to 16R. 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 the two in the X direction. It has a configuration, and is simply referred to as a vertical drive unit 22, a horizontal drive unit 23, and a rotation drive unit 30 except when described individually. The drive mechanism 15 is provided with a vertical drive unit 22, a horizontal drive unit 23, and a rotation drive unit 30 in this order from the top, and moves the corresponding measurement head 16 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 with respect to the arm 14 in the Y direction (vertical direction). 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, in 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 include 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 can be easily controlled to move in the horizontal direction by, for example, providing a combination of an actuator and a transmission mechanism individually in the X direction and the Z direction.

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

The base 11 is provided with a control unit 24 that controls each part of the ophthalmic apparatus 10 in a control box (see FIG. 1). As shown in FIG. 2, the control unit 24 includes the above-mentioned eye information acquisition unit 21, each vertical drive unit 22 as a drive mechanism 15, each horizontal drive unit 23, and each rotation drive unit 30. The examiner controller 25, the examinee controller 26, and the storage unit 27 are connected to each other. In the ophthalmic apparatus 10, electric power is supplied to the control unit 24 from a commercial power source, and the control unit 24 supplies electric 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 ophthalmic apparatus 10. The controller 26 for the subject is used for the subject to respond when acquiring various types of eye information of the eye E to be examined. The control unit 24 is connected to the examiner controller 25 and the examinee controller 26 via a wired or wireless communication path, respectively. The control unit 24 appropriately refers to the controller 25 for the examiner and the controller 26 for the subject by expanding the program stored in the connected storage unit 27 or the built-in internal memory 24a on, for example, a RAM (Random Access Memory). The operation of the ophthalmic apparatus 10 is comprehensively controlled according to the operation. In the first embodiment, the internal memory 24a is composed of a RAM or the like, and the storage unit 27 is composed of a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or the like.

Under the control of the control unit 24, the ophthalmic apparatus 10 automatically performs alignment and acquires eye information of the eye E to be inspected. Specifically, the control unit 24 operates the eye information acquisition unit 21 (its alignment detection system) and the drive mechanism 15 (vertical drive unit 22, horizontal drive unit 23, and rotation drive unit 30) to operate the above-mentioned alignment detection system. The eye information acquisition unit 21 (measurement head 16) is aligned in the XYZ direction with respect to the corresponding eye E to be inspected based on the alignment information from. After that, the control unit 24 appropriately drives the eye information acquisition unit 21 to acquire various eye information of the eye to be inspected E. In the ophthalmic apparatus 10, the eye information acquisition unit 21 is aligned with the eye to be inspected E by manually operating the examiner's controller 25, that is, the examiner drives the eye information acquisition unit 21 to drive various types of the eye to be inspected E. Optometry can be obtained. In the ophthalmic apparatus 10, when acquiring various eye information of the eye E to be inspected, the subject can respond by operating the controller 26 for the subject, and can acquire various eye information of the eye E to be inspected. Assist.
(Rotating drive unit)

Next, the configuration of the rotation drive unit 30 of the drive mechanism 15 in the ophthalmic apparatus 10 will be described. As shown in FIGS. 3 and 4, the rotation drive unit 30 is configured by providing the installation member 31 with a rotation member 32 and a rotation drive motor 33. The installation member 31 is configured by bending a plate-shaped member into an L-shaped cross section, and has an installation plate portion 34 extending in the horizontal direction and a mounting plate portion 35 extending upward in the vertical direction from the installation plate portion 34. A rotation member 32 and a rotation drive motor 33 are provided on the installation plate portion 34. The mounting plate portion 35 is fixed to the horizontal drive portion 23. Therefore, the installation member 31 can be moved in the Y direction (vertical direction), 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 installation plate portion 34 is provided with a pair of guide protrusions 36 projecting in the Y direction, that is, in the direction in which the rotating member 32 is provided. Both guide protrusions 36 have a columnar size that can be fitted into the guide groove 43 described later. In the installation member 31, a rotation center 37 extending in the Y direction is set outside the rotation drive unit 30 on the subject side in the Z direction. When the eye information acquisition unit 21 (measurement head 16) is aligned in the XYZ direction with respect to the eye E to be inspected as described above, the center of rotation 37 has a positional relationship that coincides with the rotation axis of the eyeball of the eye E to be inspected. (See Fig. 4). The axes of both guide protrusions 36 are located on an arc centered on the center of rotation 37 and having a radius at a predetermined interval d1 (see FIG. 4).

The rotating member 32 is formed by bending a plate-shaped member into a U-shaped cross section, and has a guide plate portion 38 extending in the horizontal direction, a connecting plate portion 39 extending downward in the vertical direction from the guide plate portion 38, and a connecting plate portion 39 extending in the vertical direction from the guide plate portion 38 in the horizontal direction. It has a fixed plate portion 41 that extends. In the guide plate portion 38, the outer edge portion 38a on the rotation drive motor 33 side (the side opposite to the subject in the Z direction) has a predetermined interval d2 (d2> d1 (see FIG. 4)) about the rotation center 37. It is supposed to follow an arc as a radius. A rotation side gear portion 42 is provided on the outer edge portion 38a. The rotation-side gear portion 42 is capable of engaging the drive-side gear portion 46 of the rotation output shaft 45, which will be described later, of the rotation drive motor 33.

Further, the guide plate portion 38 is provided with a guide groove 43. The guide groove 43 is formed by connecting the outer inner edge portion 43a and the inner inner edge portion 43b in the radial direction by the both end edge portions 43c. The outer inner edge portion 43a is formed along an arc whose radius is a predetermined interval 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 centered on the rotation center 37 and having a radius at a predetermined interval d4 (d4 <d1 (see FIG. 4)). The predetermined interval d3 and the predetermined interval d4 have a size with the predetermined interval d1 as an intermediate value. Therefore, the guide groove 43 is located on the circumference (drawing an arc) about the same rotation center 37 as the outer edge portion 38a provided with the rotation side gear portion 42, and the outer edge portion 38a is located. It is supposed to be located on the circumference of the radius of curvature (predetermined interval d1) smaller than the circumference (radius of curvature is a predetermined interval d2). The guide groove 43 is capable of accepting each guide protrusion 36 provided on the installation plate portion 34 while contacting the outer inner edge portion 43a and the inner inner edge portion 43b, and each end edge portion 43c covers the entire surface of each guide. It is possible to make contact with the outer peripheral surface of the protrusion 36.

In the guide plate portion 38, a pair of guide protrusions 36 provided in the installation plate portion 34 are passed through the guide groove 43. The guide plate portion 38 can move with respect to the installation plate portion 34 in the direction in which the guide groove 43 extends, that is, along the arc drawn by the guide groove 43, by the guiding action of the guide groove 43 and both guide protrusions 36. It is provided on the installation plate portion 34. As a result, the guide plate portion 38 can move with respect to the installation plate portion 34 in the rotation direction centered on 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 fixed plate portion 41 is a portion fixed to the corresponding measuring head 16 and has a plate shape extending from the connecting plate portion 39 in the first embodiment, so that rotation relative to the upper surface of the corresponding measuring head 16 is prevented. It is fixed in the state of being fixed.

The rotation drive motor 33 functions as a drive device in the rotation drive unit 30, and has a motor body 44 and a rotation output shaft 45 extending from the motor body 44. The rotation drive motor 33 rotates the rotation output shaft 45 around its axis by driving the motor body 44 under the control of the control unit 24. A drive-side gear portion 46 that can mesh with the rotation-side gear portion 42 of the guide plate portion 38 is provided on the outer peripheral surface of the rotation output shaft 45. In the rotation drive motor 33, the motor body 44 is fixed to the installation plate portion 34 of the installation member 31 in a state where the drive side gear portion 46 of the rotation output shaft 45 is meshed with the rotation side gear portion 42 of the guide plate portion 38. It is provided. The rotation output shaft 45 and the guide plate portion 38 function as a worm gear that converts the rotational force of the rotation output shaft 45 into a rotational force that rotates the guide plate portion 38 around the rotation center 37. Therefore, the rotation 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. As a result, the rotation drive unit 30 moves the measurement head 16 fixed to the fixed plate portion 41 in the rotation direction centered on 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 aligning the eye information acquisition unit 21 (measurement head 16) with respect to the eye E to be inspected in the XYZ direction by the vertical drive unit 22 and the horizontal drive unit 23 as described above. The center of rotation 37 coincides with the axis of rotation of the eyeball of the eye E to be inspected. In this state, the drive mechanism 15 moves the rotation member 32 (guide plate portion 38) in the rotation direction about the rotation center 37 to the rotation member 32 (fixed plate portion 41). The fixed measurement head 16 can be rotated about the rotation axis of the eyeball of the corresponding eye E to be inspected. At this time, the rotation driving unit 30 rotates the measurement head 16L for the left eye and the measurement head 16R for the right eye in opposite directions to disperse (diverge) the eye E to be inspected or to congest (convergence). Can be made to. As a result, the ophthalmic apparatus 10 acquires various eye information of both eyes E by performing a divergence motion and a convergence motion test, and performing a distance examination and a near examination in a binocular vision state. Can be done.

The ophthalmic apparatus 10 of Example 1 of the ophthalmic apparatus according to the present disclosure can obtain the following effects.

In the ophthalmic apparatus 10, the installation member 31 is movable in the vertical and horizontal directions 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 a rotation member 32. It is passed through the guide groove 43 of. Then, in the ophthalmic apparatus 10, when the rotation drive motor 33 is driven in the rotation drive unit 30, the rotation member 32 is guided by the guide groove 43 and the guide protrusion 36 and moves in the rotation direction about the rotation center 37. Let me. Here, the ophthalmic apparatus 10 is capable of moving the rotation member 32 in the rotation direction centered on the rotation center 37 set on the outside of the rotation drive unit 30, and the measurement head 16 is moved to the rotation member 32. Is fixed. Therefore, in the ophthalmic apparatus 10, when the rotation center 37 of the rotation drive unit 30 is aligned with the eyeball rotation axis of the eye E to be inspected by the vertical drive unit 22 and the horizontal drive unit 23, the vertical drive unit 22 and the vertical drive unit 22 are thereafter. By driving only the rotation driving unit 30 without driving, the measurement head 16 can be rotated around the rotation axis of the eyeball. As a result, the ophthalmic apparatus 10 can rotate the measurement head 16 around the eyeball rotation axis with a simple configuration and simple control of driving only the rotation drive unit 30.

In the ophthalmic apparatus 10, the rotation member 32 is provided with a rotation side gear portion 42 at the outer edge portion 38a centered on the rotation center 37 set on the outside of the rotation drive portion 30, and the guide groove 43 has a curvature smaller than that of the outer edge portion 38a. The radius is assumed to extend in an arc shape centered on the center of rotation 37. Then, when the rotation drive unit 30 is driven by the rotation drive motor 33 in which the drive side gear portion 46 provided on the rotation output shaft 45 is meshed with the rotation side gear portion 42, the ophthalmic apparatus 10 guides the guide groove 43 and the guide groove 43. Guided by the protrusion 36, the rotating member 32 moves in the rotation direction centered on the rotation center 37. Therefore, the ophthalmic apparatus 10 can appropriately move the rotating member 32 in the rotation direction about the rotation center 37 with a simple configuration.

The ophthalmic apparatus 10 is provided with a plurality of guide protrusions 36 (two in the above-described first embodiment) at intervals on the circumference centered on the rotation center 37 in the installation member 31 of the rotation drive unit 30. Therefore, in the ophthalmic apparatus 10, the guide protrusion 36 moves the rotation member 32 (measurement head 16) in the rotation direction around the rotation center 37 (eyeball rotation axis of the eye E to be inspected) in cooperation with the guide groove 43. At the same time, it is possible to prevent the rotating member 32 from moving or rotating in an unintended direction.

In the ophthalmic device 10, since the drive mechanism 15 suspends and supports the measurement head 16 so as to be movable, it is not necessary to position the drive mechanism 15 in front of the subject, and the drive mechanism 15 can be moved in the XYZ direction. A space can be provided in front of the subject, and the subject can be prevented from feeling oppressive.

The ophthalmic apparatus 10 is provided with measurement heads 16 in pairs corresponding to the left and right eye Es to be inspected, and the vertical drive unit 22, the horizontal drive unit 23, and the rotation drive unit 30 correspond to the left and right measurement heads 16. It is provided in pairs. Therefore, the ophthalmic apparatus 10 can acquire the eye information of each eye E to be inspected in the state of binocular vision. Further, the ophthalmic apparatus 10 tests the divergence motion and the convergence motion only by driving the rotation drive unit 30, and also performs a distance inspection and a near-distance inspection using both measurement heads 16 to perform both coverings. Various eye information of optometry E can be acquired.

The ophthalmic apparatus 10 includes an optometry table 12 facing the subject, a support column 13 and an arm 14 as support arms extending upward from the table 12, and a drive mechanism 15 is provided at the tip of the support arm portion. Therefore, it is not necessary to provide the drive mechanism 15 on the optometry table 12, and the optometry table 12 is used for acquiring eye information (optometry) or a controller used by the examiner or the subject (the examiner controller 25). , Can be used as a storage place for the controller 26) for the subject.

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

Although the ophthalmic apparatus of the present disclosure has been described based on the first embodiment, the specific configuration is not limited to the first embodiment and does not deviate from the gist of the invention according to each claim in the claims. As long as the design is changed or added, it is permissible.

For example, in the first embodiment, in the installation member 31 of the rotation drive unit 30, two guide protrusions 36 are provided at intervals on the circumference centered on the rotation center 37. However, the guide protrusion 36 can move the rotation member 32 (measurement head 16) in the rotation direction about the rotation center 37 (the eyeball rotation axis of the eye E to be inspected) in cooperation with the guide groove 43, and also. It is not limited to the configuration of the first embodiment as long as it can prevent the rotating member 32 from moving or rotating in an unintended direction. As another example, as shown in FIG. 5, for example, the guide protrusion 36A may be composed of a single member curved along the circumference centered on the rotation center 37, and may be composed of a single member of the first embodiment. Three or more guide protrusions 36 may be provided.

Further, 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 or may have another configuration as long as it 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.

Further, in the first embodiment, the rotating member 32 of the rotating driving unit 30 is assumed to have a guide plate portion 38, a connecting plate portion 39, and a fixing plate portion 41. However, if the rotating member 32 can be moved in the rotation direction centered on the rotation center 37 by the guiding action of the guide groove 43 and the guide protrusion 36, and the measuring head 16 is fixed, the rotating member 32 can be moved. 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 worm gears in order to transmit the driving force from the drive device (rotation drive motor 33) to the rotation member 32. However, the drive device (rotation drive motor 33) may have another configuration as long as it moves the rotation member 32 in the rotation direction guided by the guide groove 43 and the guide protrusion 36 when driven, and the first embodiment may be used. It is not limited to the configuration of.

10 Ophthalmology equipment 12 Optometry table 13 (Consists of a support arm as an example) Strut 14 (Consists of a support arm as an example) Arm 15 Drive mechanism 16 Measuring head 21 Eye information acquisition unit 22 Vertical drive unit 23 Horizontal Drive unit 30 Rotation drive unit 31 Installation member 32 Rotation member 33 Rotation drive motor (as an example of drive device) 36 Guide protrusion 37 Rotation center 38a Outer edge 42 Rotation side gear 43 Guide groove 45 Rotation output shaft 46 Drive side gear E Eye to be inspected

Claims (6)

A measurement head that houses an eye information acquisition unit that acquires eye information of the eye to be inspected,
A drive mechanism for suspending and movably supporting the measuring head is provided.
The drive mechanism includes a vertical drive unit that moves in the vertical direction, a horizontal drive unit that moves in the horizontal direction, and a rotation drive unit that rotates around the eyeball rotation axis of the eye to be inspected.
The rotation drive unit is provided with an installation member that is movable in the vertical and horizontal directions by the vertical drive unit and the horizontal drive unit, and is provided so as to be movable with respect to the installation member, and the measurement head is fixed. It has a rotating member and a driving device for moving the rotating member.
The rotating member has a guide groove extending in an arc shape centered on a rotation center set on the outside of the rotating drive unit.
The installation member has a guide protrusion that protrudes toward the rotation member and is passed through the guide groove.
An ophthalmic apparatus, characterized in that when the driving device is driven, the rotating member is guided by the guide groove and the guide projection and moved in a rotation direction about the center of rotation. The rotating member has an outer edge portion having a radius of curvature larger than that of the guide groove and along an arc centered on the center of rotation, and a rotating side gear portion provided on the outer edge portion.
The ophthalmologic device according to claim 1, wherein the drive device is fixed to the installation member and has a drive side gear portion that is meshed with the rotation side gear portion. The ophthalmic apparatus according to claim 1 or 2, wherein a plurality of the guide protrusions are provided at intervals on a circumference centered on the center of rotation. The ophthalmic apparatus according to claim 1 or 2, wherein the guide protrusion is a single member along a circumference centered on the center of rotation. The measuring heads are provided in pairs corresponding to the left and right eyes to be inspected.
Any of claims 1 to 4, wherein the vertical drive unit, the horizontal drive unit, and the rotation drive unit are provided in pairs corresponding to the left and right measurement heads. Or the ophthalmic apparatus according to item 1. The ophthalmic apparatus according to any one of claims 1 to 5.
Further, an optometry table facing the subject and a support arm extending upward from the optometry table are provided.
The drive mechanism is an ophthalmic apparatus characterized in that it is provided at the tip of the support arm portion.

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