JP6962768B2 - 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 measurement optical systems in each of the two main bodies, and by driving each measurement optical system while keeping both main bodies in an appropriate posture for both eyes to be inspected, in a binocular vision state. Information on the eye to be inspected can be obtained.

International Publication No. 2003/041571

Here, since the eye information acquisition unit provided in each main body of the ophthalmic apparatus is expensive, it is desirable that each eye information acquisition unit can be repaired or replaced.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide an ophthalmic apparatus capable of repairing or replacing each eye information acquisition unit.

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 has a connecting shaft extending downward, and can be moved in the vertical and horizontal directions by the vertical drive unit and the horizontal drive unit. The connection shaft is provided with an insertion side connection unit at the lower end portion. The measurement head is provided with a receiving side connection portion at the upper end portion for receiving the insertion side connection portion, and the measurement head is relatively in a state where the insertion side connection portion is inserted into the receiving side connection portion. It is characterized in that it is fixed to the connecting shaft by being rotated.

According to the ophthalmic apparatus of the present disclosure, it is possible to repair or replace each eye information acquisition unit.

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 which enlarges and shows the lower end part of the connection shaft of a rotation drive part. It is explanatory drawing which enlarges and shows the periphery of the connection hole of the connection plate in the upper end part of the measurement head 16. It is explanatory drawing which shows the state which looked at the periphery of the connection hole of a connection plate from the back side. It is explanatory drawing which shows the mode that the connection shaft part and the connection plate part of a connection shaft are fitted into the connection hole of a connection plate. It is sectional drawing obtained along the line I-I of FIG. It is sectional drawing obtained along the line II-II of FIG.

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 9. First, the overall configuration of the ophthalmic apparatus 10 of Example 1 will be described. In addition, in FIG. 5 and FIG. 7, the measuring head 16 is shown as a simple rectangular parallelepiped shape in order to avoid complication.
"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 to be inspected with the left and right eyes to be inspected open. 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 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 so as to individually correspond to the left and right eyes of the subject, and will be referred to as the left eye measurement head 16L and the right eye measurement head 16R when described individually below. .. The left eye measurement head 16L acquires information on the eye to be inspected on the left side of the subject, and the measurement head 16R for the right eye acquires information on the eye to be inspected on the right side of the subject. 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 to be inspected is acquired by the eye information acquisition unit 21, which will be described later, through the deflection member 18. Therefore, in the ophthalmic apparatus 10, information on the eye to be examined can be acquired simultaneously for both eyes while the subject has both left and right eyes open.

Each measurement head 16 accommodates an eye information acquisition unit 21 that acquires eye information of the eye to be inspected (referred to as a right eye information acquisition unit 21R and a left eye information acquisition unit 21L when described individually (see FIG. 2)). Has been done. The eye information includes an image of the eye to be inspected, an image of the fundus of the eye to be inspected, a tomographic image of the retina of the eye to be inspected, a corneal endothelial image of the eye to be inspected, the refractive force of the eye to be inspected, the shape of the cornea of the eye to be inspected, and the like. It refers to the intraocular pressure of the eye to be inspected. 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 to be inspected, and a refractive force. Refractometers and wave surface sensors, fundus cameras that capture images of the fundus, tomography devices (OCT) that capture tomographic images of the retina, specular microscopes that capture corneal endothelial images, keratometers that measure corneal shape, and intraocular pressure The tonometer and the like to be measured are configured individually or in combination.

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 to be inspected and fixes the visual axis of the eye to be inspected. The observation system photographs the anterior segment of the eye 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 check the condition of the eye 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. 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 direction. The alignment information is information used for alignment (alignment) of each eye information acquisition unit 21 with respect to the eye to be inspected. The measurement system irradiates the eye to be inspected with a luminous flux for acquiring the eye characteristics of the eye 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 to be inspected. The configuration of the rotation drive unit 30 will be described in detail later. Thereby, 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 measurement head 16 about the rotation axis of the eyeball of the eye to be inspected. ..

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 subject controller 26 is used for the subject to respond when acquiring various types of eye information of the subject. 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 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 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. In the ophthalmic apparatus 10, the eye information acquisition unit 21 is aligned with the eye to be inspected by the operator manually, that is, the examiner operates the controller 25 for the examiner, and the eye information acquisition unit 21 is driven to drive various eyes of the eye to be inspected. Information can be obtained. In the ophthalmic apparatus 10, when acquiring various eye information of the eye to be inspected, the subject can respond by operating the controller 26 for the subject, and assists in the acquisition of various eye information of the eye to be inspected. ..
(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 FIG. 3, 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 rotating member 32 is formed by bending a plate-shaped member into a U-shaped cross section, and has a guide plate portion 36 extending in the horizontal direction, a connecting plate portion 37 extending downward in the vertical direction from the guide plate portion 36, and a connecting plate portion 37 extending in the vertical direction from the guide plate portion 36 in the horizontal direction. It has a fixed plate portion 38 that extends. The guide plate portion 36 is provided with a guide groove 41 extending in an arc shape and a gear portion 42 provided on the outer edge portion. A pair of guide protrusions 43 provided so as to project in the Y direction from the installation plate portion 34 are passed through the guide groove 41. The guide plate portion 36 can move with respect to the installation plate portion 34 in the direction in which the guide groove 41 extends, that is, along the arc drawn by the guide groove 41, by the guiding action of the guide groove 41 and both guide protrusions 43. It is provided on the installation plate portion 34. As a result, the guide plate portion 36 can rotate with respect to the installation plate portion 34 about the rotation axis 44, which is the center of the arc drawn by the guide groove 41. In the guide plate portion 36, the outer edge portion on the rotation drive motor 33 side has an arc concentric with the arc of the guide groove 41, and the gear portion 42 is provided on the outer edge portion. The gear portion 42 is capable of engaging the gear groove 48 of the rotation output shaft 47, which will be described later, of the rotation drive motor 33.

The connecting plate portion 37 connects the guide plate portion 36 and the fixing plate portion 38. The fixed plate portion 38 is a portion fixed to the corresponding measuring head 16, and in the first embodiment, it has a plate shape extending from the connecting plate portion 37, and a connecting shaft 45 for connecting to the measuring head 16 is provided. ing. The connecting shaft 45 has a rod shape extending in the Y direction, is provided so as to project downward from the fixing plate portion 38, and the lower end portion 45a is prevented from rotating relative to the upper surface of the corresponding measuring head 16. It is fixed. This fixed configuration will be described in detail later.

The rotation drive motor 33 is configured such that the rotation output shaft 47 extends from the motor body 46 fixed to the installation plate portion 34 of the installation member 31, and is driven to rotate the rotation output shaft 47. A gear groove 48 that can mesh with the gear portion 42 of the guide plate portion 36 is provided on the outer peripheral surface of the rotation output shaft 47. The rotation drive motor 33 is provided with the motor body 46 fixed to the installation plate portion 34 in a state where the gear groove 48 of the rotation output shaft 47 is meshed with the gear portion 42 of the guide plate portion 36. The rotation output shaft 47 and the guide plate portion 36 function as a worm gear that converts the rotational force of the rotation output shaft 47 into a rotational force that rotates the guide plate portion 36 around the rotation shaft 44. The rotation drive motor 33 is driven under the control of the control unit 24 to move the guide plate portion 36 along the arc drawn by the guide groove 41. As a result, the rotation drive unit 30 moves the measurement head 16 attached to the connection shaft 45 in the rotation direction centered on the rotation shaft 44 with respect to the horizontal drive unit 23 to which the mounting plate portion 35 is fixed. Can be done.

The drive mechanism 15 aligns the eye information acquisition unit 21 (measurement head 16) with respect to the eye to be inspected in the XYZ direction by the vertical drive unit 22 and the horizontal drive unit 23, so that the rotation axis 44 of the rotation drive unit 30 is aligned with the eye to be inspected. Aligned with the axis of rotation of the eyeball. As a result, the rotation driving unit 30 can rotate the measurement head 16 around the corresponding eyeball rotation axis of the eye 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 diverge (diverge) or converge (convergence) the eye to be inspected. Can be done. As a result, the ophthalmic apparatus 10 can perform tests of divergence movement and vergence movement, and perform distance examination and near vision examination in the state of binocular vision to acquire various eye information of both eyes. can.
(Mounting structure of measuring head)

Next, a mounting structure for mounting the measurement head 16 on the rotation drive unit 30 will be described. In this mounting structure, the connecting shaft 45 of the measuring head 16 is provided with the insertion side connecting portion 50, and the measuring head 16 is provided with the receiving side connecting portion 60 (see FIG. 5 and the like). In this mounting structure, the measuring head 16 is fixed to the connecting shaft 45 in a state where the insertion side connecting portion 50 is relatively rotated while being inserted into the receiving side connecting portion 60, so that the rotation is prevented. ..

As shown in FIG. 4, the insertion-side connecting portion 50 is provided at the lower end portion 45a of the connecting shaft 45, and has a connecting shaft portion 51 and a connecting plate portion 52. The connecting shaft portion 51 is provided so as to extend downward from the lower end portion 45a and has a columnar shape. The connection plate portion 52 is provided at the lower end of the lower end portion 45a and has a plate shape along the XZ plane which is a plane orthogonal to the axis of the connection shaft 45. The connecting plate portion 52 is elongated in the X direction, which is one direction orthogonal to the axis of the connecting shaft 45, and the dimension in the Z direction (short direction) is smaller than the diameter dimension of the connecting shaft portion 51. ..

The connecting plate portion 52 is provided with a plate-side inclined surface 53 on the upper surface 52b of both end portions 52a in the X direction (long direction). The plate-side inclined surface 53 is a flat surface that is inclined so that the thickness of the connecting plate portion 52 decreases toward the outside (the side away from the connecting shaft portion 51). Both end portions 52a of the connection plate portion 52 provided with the plate side inclined surface 53 are rounded so as to eliminate corners.

At the lower end 45a of the connecting shaft 45, a fixing screw groove 54 is provided on the outer peripheral surface 45b. The fixing screw groove 54 is provided for attaching the nut 55 shown in FIG. The nut 55 has an annular shape that can surround the lower end portion 45a of the connecting shaft 45, and is provided with a screw groove 55a (see FIG. 8) that can mesh with the fixing screw groove 54 on the inner peripheral surface.

As shown in FIG. 5, the receiving side connecting portion 60 is configured by providing a connecting plate 61 at the upper end portion 16a of the measuring head 16 and providing a connecting hole 62 penetrating the connecting plate 61. The connection plate 61 has a plate shape along the XZ plane, and the position where the connection hole 62 is provided is partially reduced in thickness dimension (dimension in the Y direction) (see FIG. 6). As shown in FIGS. 5 and 6, the connection hole 62 has a rotary hole portion 63 and a plate-shaped hole portion 64. The rotary hole portion 63 penetrates the connection plate 61 in a circular shape when viewed from the front in the Y direction, and the connection shaft portion 51 of the insertion side connection portion 50 provided on the connection shaft 45 is rotatably fitted. It is said to be as large as possible. The plate-shaped hole portion 64 penetrates the connection plate 61 in a rectangular shape when viewed from the front, and is sized so that the connection plate portion 52 of the insertion side connection portion 50 provided on the connection shaft 45 can pass through. .. The plate-shaped hole portion 64 is continuous with the rotary hole portion 63 and extends in both directions in the Z direction with the rotary hole portion 63 as the center. Therefore, the connection hole 62 has a shape in which the center of the rectangular plate-shaped hole portion 64 elongated in the Y direction is partially bulged by the rotating hole portion 63 when viewed from the front.

In the receiving side connecting portion 60, when the extending directions of the plate-shaped hole portion 64 and the connecting plate portion 52 of the insertion side connecting portion 50 coincide with each other, the insertion side connecting portion 50, that is, the connecting shaft portion 51 and the connecting plate portion 52 are moved in the Y direction. Can be passed through. Further, in the receiving side connecting portion 60, if the extending directions of the plate-shaped hole portion 64 and the connecting plate portion 52 are different (mismatch), the connecting plate portion 52 is X of the plate-shaped hole portion 64 in the connecting plate 61. It is caught on both sides in the direction and cannot pass through the insertion side connecting portion 50 in the Y direction. In the receiving side connecting portion 60, the insertion side connecting portion 50 is inserted from above. Therefore, in the receiving side connecting portion 60, as shown in FIG. 6, both side portions of the plate-shaped hole portion 64 in the X direction pass through the connecting plate portion 52 on the back surface 61a facing the lower side of the connecting plate 61. It becomes the contact portion 65 which prevents.

In the receiving side connecting portion 60, a contact side inclined surface 66 is provided on both contact portions 65. The contact-side inclined surface 66 is a flat surface that is inclined so as to reduce the thickness of the connection plate 61 toward the inside (the side approaching the connection hole 62), and the inclination angle with respect to the XZ plane is the insertion side connection. It is made equal to the plate side inclined surface 53 of the portion 50. Both contact-side inclined surfaces 66 are provided in pairs so as to face each other in the X direction, and receive the connection plate portion 52 of the insertion-side connecting portion 50 so that the plate-side inclined surfaces 53 are in surface contact with each other. It is possible (see FIG. 8).

Next, how to attach the measurement head 16 to the rotation drive unit 30 will be described with reference to FIG. 7. In FIG. 7, the rotation drive unit 30 is shown only by the connection shaft 45 in order to avoid complication, and in order to facilitate grasping the state of the connection shaft portion 51 and the connection plate portion 52 with respect to the connection hole 62. The nut 55 is omitted. First, a nut 55 is provided at the lower end portion 45a of the connection shaft 45 of the insertion side connection portion 50 so as to be located at the uppermost position while engaging the fixing screw groove 54 and the screw groove 55a (see FIG. 8). After that, as shown on the left side of FIG. 7, the plate-shaped hole portion 64 of the connection hole 62 of the receiving side connection portion 60 extends in the X direction in accordance with the connection plate portion 52 extending in the X direction on the connection shaft 45. The direction of the measuring head 16 is adjusted so as to be.

After that, as shown in the center of FIG. 7, the measuring head 16 is moved upward, the connecting plate portion 52 is passed through the plate-shaped hole portion 64, and the connecting shaft portion 51 of the insertion side connecting portion 50 is passed through the receiving side connecting portion 60. It is fitted into the rotary hole portion 63 of the connection hole 62 of. In this state, the connection plate 61 (measurement head 16) and the connection shaft 45 (rotation drive unit 30) can rotate relative to each other with the connection shaft portion 51 in the rotation hole portion 63 as the rotation axis (rotation drive unit 30). (See FIG. 9). Further, in this state, since the connecting shaft portion 51 fits into the rotating hole portion 63, the connection plate 61 and the connecting shaft 45 are prevented from moving relative to each other in the direction along the XZ plane. Relative movement in the Y direction is possible (see FIG. 9).

After that, as shown on the right side of FIG. 7, the measuring head 16 is rotated so that the plate-shaped hole portion 64 of the connection hole 62 extends in the Z direction. Then, the inclined surfaces 66 on both contact sides of the receiving side connecting portion 60 and the inclined surfaces 66 on both contact sides of the insertion side connecting portion 50 face each other in the Y direction. Then, when the support of the measuring head 16 is released, the connecting plate portion 52 comes into contact with the receiving side connecting portion 60 in a state where the inclined surfaces 66 on both contact sides and the inclined surfaces 66 on both contact sides are in surface contact with each other due to the weight of the measuring head 16. Contact portion 65 (see FIG. 8). At this time, even if the inclined surfaces on both contact sides 66 and the inclined surfaces on both contact sides 66 do not completely face each other, that is, the extending direction of the plate-shaped hole portion 64 does not match the X direction, the inclined surfaces on both contact sides are inclined. The connecting plate 61 (measurement head 16) rotates with respect to the connecting shaft 45 due to the guiding action between the surface 66 and the inclined surfaces 66 on both contact sides, and both inclined surfaces are in surface contact with each other. As a result, the relative rotation of the connection plate 61 (measurement head 16) and the connection shaft 45 (rotation drive unit 30) is prevented.

After that, the nut 55 provided on the connecting shaft 45 is rotated and tightened, and the nut 55 is moved downward with respect to the connecting shaft 45. The inclined surface 66 is brought into close contact with the connecting plate portion 52 and the contact portion 65. Then, the connection plate 61 and the connection shaft 45 are prevented from moving relative to each other in the Y direction. At this time, as shown in FIG. 9, since the connection shaft portion 51 fits into the rotation hole portion 63, the relative movement in the direction along the XZ plane is prevented, so that the relative movement and rotation The connection plate 61 and the connection shaft 45 are connected in a state where the above is prevented. As a result, the measurement head 16 is fixed to the rotation drive unit 30 (the connection shaft 45 thereof) in a state where misalignment and rotation are prevented. Therefore, the measurement head 16 is rotationally moved around the eyeball rotation axis by the rotation drive unit 30 rotating and moving the connection shaft 45 around the eyeball rotation axis of the eye to be inspected.

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

The ophthalmic apparatus 10 is configured such that the drive mechanism 15 suspends and movably supports the measurement head 16. The drive mechanism 15 and the measurement head 16 insert the insertion side connection portion 50 of the lower end portion 45a of the connection shaft 45 of the rotation drive portion 30 of the drive mechanism 15 into the receiving side connection portion 60 of the upper end portion 16a of the measurement head 16. By rotating it relatively, it is possible to fix it. Therefore, in the ophthalmic apparatus 10, the measurement head 16 can be easily attached to or detached from the rotation drive unit 30, so that the eye information acquisition unit 21 provided on the measurement head 16 can be easily repaired or replaced. Can be done. Further, 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 ophthalmic device 10 can move in the XYZ direction. However, a space can be provided in front of the subject, and the subject can be prevented from feeling oppressive.

The ophthalmic apparatus 10 adjusts the direction of the measuring head 16 so that the directions of the connecting plate portion 52 of the connecting shaft 45 and the plate-shaped hole portion 64 of the connecting hole 62 of the receiving side connecting portion 60 match. The portion 52 can be passed through the plate-shaped hole portion 64, and the connection shaft portion 51 of the insertion side connection portion 50 can be fitted into the rotation hole portion 63 of the connection hole 62. At this time, the insertion side connecting portion 50 and the receiving side connecting portion 60 are prevented from moving relative to each other in the direction along the XZ plane by the connecting shaft portion 51 and the rotating hole portion 63, and are relative to each other in the Y direction. The movement is possible, and the relative rotation with the connecting shaft portion 51 as the center of rotation is possible. After that, when the direction of the measuring head 16 is adjusted so that the plate-shaped hole portion 64 of the connection hole 62 extends in the Z direction, the connection plate portion 52 of the connection shaft 45 comes into contact with the contact portion 65 of the receiving side connection portion 60. The measuring head 16 can be attached to the connecting shaft 45. As a result, the work of attaching the measuring head 16 to the connecting shaft 45 can be facilitated.

When the ophthalmic apparatus 10 adjusts the direction of the measuring head 16 so that the plate-shaped hole portion 64 of the connecting hole 62 extends in the Z direction in a state where the connecting shaft portion 51 is fitted into the rotating hole portion 63, both contacts are formed. The side inclined surface 66 and the both contact side inclined surfaces 66 can be in a positional relationship facing each other in the Y direction. Then, when the support of the measurement head 16 is released, the connection plate portion 52 is brought into contact with the both contact side inclined surfaces 66 and the both contact side inclined surfaces 66 by the weight of the measuring head 16 of the receiving side connecting portion 60. It can be brought into contact with the contact portion 65. At this time, even if the inclined surfaces on both contact sides 66 and the inclined surfaces on both contact sides are not completely facing each other, the measuring head 16 rotates with respect to the connecting shaft 45 due to the guiding action of both sides, and both inclined surfaces face each other. The contact state can be obtained, and the relative rotation between the measurement head 16 and the connection shaft 45 can be prevented. As a result, the work of attaching the measuring head 16 to the connecting shaft 45 can be facilitated.

The ophthalmic apparatus 10 is provided with measuring heads 16 in pairs corresponding to the left and right eyes 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 to be inspected in the state of binocular vision. Further, since the ophthalmic apparatus 10 makes it easy to attach and detach each measurement head 16 to the connection shaft 45 of each rotation drive unit 30, repair of the eye information acquisition unit 21 provided on each measurement head 16 can be performed. Can be easily replaced.

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, each eye information acquisition unit 21 can be repaired or replaced.

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, the installation member 31 of the rotation drive unit 30 is fixed to the horizontal drive unit 23. However, the rotation drive unit 30 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. The configuration is not limited to the first embodiment.

Further, in the first embodiment, the rotation driving unit 30 is configured so that the rotation member 32 can move in the rotation direction about the rotation shaft 44 with respect to the installation member 31. However, the rotation drive unit 30 may have any other configuration as long as the measurement head 16 fixed to the connection shaft 45 can be rotated around the eyeball rotation axis of the eye to be inspected. Not limited.

10 Ophthalmology equipment 12 Optometry table 13 (Consists of a part of the support arm as an example) Strut 14 (Consists of a part of the support arm as an example) Arm 15 Drive mechanism 16 Measuring head 16a Upper end 21 Eyes Information acquisition unit 22 Vertical drive unit 23 Horizontal drive unit 30 Rotation drive unit 45 Connection shaft 45a Lower end 50 Insertion side connection 51 Connection shaft part 52 Connection plate part 53 Plate side inclined surface 60 Receiving side connection part 63 Rotating hole part 64 Plate Shaped hole part 65 Contact part 66 Contact side inclined surface

Claims (3)

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 has a connecting shaft extending downward, and is made movable in the vertical direction and the horizontal direction by the vertical drive unit and the horizontal drive unit.
In the connection shaft, an insertion side connection portion is provided at the lower end portion, and the connection portion is provided.
In the measuring head, a receiving side connecting portion for receiving the insertion side connecting portion is provided at the upper end portion.
The measuring head is fixed to the connecting shaft by being relatively rotated with the insertion side connecting portion inserted into the receiving side connecting portion .
The insertion-side connecting portion has a cylindrical connecting shaft portion extending downward from the lower end portion and a plate-shaped connecting shaft portion protruding downward from the connecting shaft portion in one direction orthogonal to the axis of the connecting shaft portion at the lower end of the connecting shaft portion. With a connecting plate part,
The receiving side connection portion includes a rotary hole portion into which the connection shaft portion can be rotatably fitted, a plate-shaped hole portion through which the connection plate portion can be passed while being continuous with the rotary hole portion, and the plate. It has contact portions on both sides of the shaped hole portion that prevent the connection plate portion from passing through.
The connecting plate portion is provided with a plate-side inclined surface on the upper surface that reduces the thickness of the connecting plate portion toward the outside.
The said contact portion, ophthalmic characterized that you have contact-side inclined surface is provided while reducing the thickness of the contact portion brought into toward the plate-shaped hole portion extending along said plate-shaped hole portion Device. The measuring heads are provided in pairs corresponding to the left and right eyes to be inspected.
Wherein A vertical drive unit and the horizontal driving unit and said turning drive unit, ophthalmologic apparatus according to claim 1, characterized that you have provided in pairs corresponding to the left and right the measuring head. The ophthalmic apparatus according to claim 1 or 2.
Further, an optometry table facing the subject and a support arm extending upward from the optometry table are provided.
The drive mechanism, ophthalmology device you wherein provided at the distal end of the support arm portion.

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