Ophthalmologic apparatus

Abstract

To provide an ophthalmologic apparatus capable of maintaining a stable state of a body part even when the gravity center balance of the body part is lost in a state that the body part is placed on an optical table, and capable of being lifted stably when moved.SOLUTION: An ophthalmologic apparatus 1 includes a body part 10 incorporating an optical system 30 for acquiring eye information on an eye to be examined, which is placed on an optical table 100, and a face support part 20 for supporting the face of a subject, and can be moved from the optical table 100. The body part 10 includes a finger hook 18 for an operator to hook a finger when moved, an adsorptive leg part 17 that can be adsorbed on a top plate 101 of the optical table 100, and a release mechanism operated by the operator for releasing an adsorbing state of the adsorptive leg part 17. The release mechanism is disposed at a position where the operator can operate it in a state that the finger is hooked on the finger hook 18.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to ophthalmic devices. [Background technology]

[0002] Conventionally, there has been known an ophthalmic apparatus that has a plurality of legs provided on the bottom surface of a main body that incorporates an optical system capable of acquiring ocular information of a subject's eye, and is placed on an optical table via the legs (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-186843 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional ophthalmologic apparatus, the legs of the main body are placed on the optical table in a state where they are pressed against the top plate of the optical table by the weight of the main body. Therefore, for example, after acquiring eye information, in a scene where the subject unintentionally touches or grabs the face support part arranged on the front side of the main body facing the subject, there is a concern that some of the legs may rise up from the optical table and the main body may become unstable if the balance of the center of gravity of the main body is lost.

[0005] In addition, an ophthalmic apparatus is generally movable from an optical table, and an operator who moves the ophthalmic apparatus places his / her fingers on the main body to lift and move it. If the operator releases his / her fingers while lifting the main body, the main body may become unstable and fall.

[0006] The present disclosure has been made with attention to the above-mentioned problems, and aims to provide an ophthalmic device that can maintain a stable state of the main body even if the balance of the center of gravity of the main body is disturbed when placed on an optical table, and that can be easily moved in a stable state. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objective, the ophthalmic device disclosed herein comprises an optical system for acquiring ocular information of a subject's eye, a main body unit that incorporates the optical system and is placed on an optical table, and a face support unit that supports the subject's face when acquiring the ophthalmic information, and is movable from the optical table, wherein the main body unit has a finger hook unit on which an operator places his / her finger when moving, an adhesive foot unit that can be adhered to the top plate of the optical table, and a release mechanism that is operated by the operator to release the adhesive state of the adhesive foot unit, and the release mechanism is positioned in a position where it can be operated by the operator with his / her finger hooked on the finger hook unit. Effect of the Invention

[0008] As a result, the ophthalmic apparatus of the present disclosure can maintain a stable state of the main body even if the center of gravity balance of the main body is disturbed when placed on an optical table, and can be lifted stably when moved. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing an ophthalmologic apparatus of a first embodiment placed on an optical table. [Diagram 2] 1 is a side view showing an ophthalmologic apparatus of a first embodiment placed on an optical table. [Diagram 3] FIG. 2 is an explanatory diagram showing the bottom surface of the ophthalmologic apparatus of the first embodiment. [Figure 4] FIG. 4 is an explanatory diagram showing the AA end face in FIG. [Diagram 5] FIG. 4 is an explanatory diagram showing weight acting on the ophthalmic apparatus. [Figure 6] 10 is an explanatory diagram showing a state in which the suction legs are released in the ophthalmologic apparatus of the first embodiment. FIG. [Figure 7] FIG. 2 is an explanatory diagram showing a state in which the ophthalmologic apparatus of the first embodiment is lifted up from an optical table. [Figure 8] FIG. 13 is an explanatory diagram showing the bottom surface of the ophthalmologic apparatus of the first modified example. [Figure 9] 13 is an explanatory diagram showing a side view of a main part of an ophthalmic apparatus according to a second modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The embodiment for carrying out the ophthalmic device of the present disclosure will be described as follows based on Example 1 shown in the drawings. Note that, as shown in each drawing throughout this specification, the X-axis, Y-axis, and Z-axis are taken, and the description in this specification will be based on the left-right direction (X-axis positive direction is rightward, negative direction is leftward), the front-rear direction (Z-axis positive direction is backward, negative direction is forward), and the up-down direction (Y-axis positive direction is upward, Y-axis negative direction is downward, also called height direction) in FIG. 1. In addition, the subject side (Z-axis negative direction) is defined as the front of the ophthalmic device 1, the side facing the subject (Z-axis positive direction) as the back of the ophthalmic device 1, the right side of the subject (X-axis positive direction) as the right side of the ophthalmic device 1, and the left side of the subject (X-axis negative direction) as the left side of the ophthalmic device 1.

[0011] The ophthalmic apparatus 1 of the first embodiment is an autorefractometer capable of performing subjective and objective tests. Subjective tests that can be performed by the ophthalmic apparatus 1 include, for example, a distance test, a near test, a contrast test, and a glare test. Objective measurements that can be performed by the ophthalmic apparatus 1 include objective refraction measurement and corneal shape measurement. The ophthalmic apparatus 1 of the first embodiment is capable of capturing images of the anterior segment and fundus of the subject's eye (still images and moving images).

[0012] Here, the ophthalmic device 1 to which the present disclosure is applied is not limited to an autorefractometer. The ophthalmic device 1 may be an objective refraction measuring device, a corneal shape measuring device, a fundus photographing device, an axial length measuring device, an intraocular pressure measuring device, an axial length measuring device, an endothelial cell measuring device, an optical coherence tomography (OCT) device, a scanning laser ophthalmoscope (SLO), or the like, as long as it can objectively obtain ocular information of the subject's eye.

[0013] As shown in Figures 1 and 2, the ophthalmic apparatus 1 of Example 1 is placed on an optical table 100, and is used with a subject sitting on a chair (not shown) placed in front of the optical table 100.

[0014] Here, the optical table 100 includes a top plate 101 on which the ophthalmic apparatus 1 is placed, a table lifting mechanism 102 for raising and lowering the top plate 101, a table control unit 103 for controlling the drive of the table lifting mechanism 102, a power button 104, a lifting lever 105 for manually operating the table lifting mechanism 102, and a caster base 106 to which the table lifting mechanism 102 is attached.

[0015] The top plate 101 is a plate member having a smooth surface, and a suction cup can be attached to the surface.

[0016] The table lifting mechanism 102 includes a lifting rod 102a that supports the top plate 101, a support rod 102b that supports the lifting rod 102a so that it can move up and down, and a drive unit 102c that moves the lifting rod 102a up and down. When driven by the drive unit 102c, the table lifting mechanism 102 moves the lifting rod 102a up and down, and moves the top plate 101 together with the support rod 102b in the vertical direction. This allows the height of the optical table 100 (the height of the top plate 101) to be set arbitrarily.

[0017] A plurality of casters 106a with a locking mechanism are provided on the caster base 106. The caster base 106 can easily move the ophthalmic apparatus 1 placed on the top plate 101 together with the optical table 100 to a desired installation location by rotating the casters 106a, or can make the optical table 100 immovable by locking the casters 106a.

[0018] The table control unit 103 is electrically connected to the table lifting mechanism 102, the power button 104, and the lifting lever 105. The table control unit 103 receives an ON / OFF operation input signal from the power button 104 to turn the power of the optical table 100 ON / OFF. The table control unit 103 receives an up or down operation input signal from the lifting lever 105 to control and drive the drive unit 102c, moving the lifting rod 102a up and down, and moving the top board 101 in the vertical direction.

[0019] The ophthalmic device 1 of Example 1 is mainly composed of a main body unit 10, a face support unit 20, an optical system 30 built into the main body unit 10 for acquiring the ocular characteristics of the subject's eye, and a control unit 40 built into the main body unit 10 for comprehensively controlling the operation of the ophthalmic device 1.

[0020] The main body 10 includes a base 11 , a measuring head 12 , and a monitor 13 .

[0021] The base unit 11 is located below the measuring head 12, and has a known XYZ drive mechanism / drive circuit 14 built in as a movement mechanism for moving the measuring head 12 in the X, Y and Z directions. The XYZ drive mechanism / drive circuit 14 has, for example, a stepping motor as a drive mechanism.

[0022] The measuring head 12 is supported so as to be movable both horizontally and vertically with respect to the base unit 11. The XYZ drive mechanism and drive circuit 14 drives the measuring head 12 horizontally with respect to the base unit 11, i.e., in the front-back and left-right directions (X-axis and Z-axis directions), and vertically with respect to the base unit 11, i.e., in the up-down direction (Y-axis direction). Note that the examiner issues an instruction to move the measuring head 12 by touching a touch panel display surface 13a of the monitor unit 13.

[0023] The measurement head 12 incorporates an optical system 30 (e.g., a measurement optical system, a photographing optical system, a visual target presenting optical system, an alignment optical system, etc.) for acquiring ocular information of the subject's eye, and a control unit 40. A lens housing unit 15 is formed on the front side of the measurement head 12, and a monitor unit 13 is provided on the rear side of the measurement head 12. The lens housing unit 15 accommodates an objective lens 31 that constitutes a part of the optical system 30 and has an optical axis parallel to the Z-axis direction.

[0024] The monitor unit 13 is configured by a display device having a display surface 13a made of, for example, a touch panel type liquid crystal screen. The monitor unit 13 displays various photographing and measurement data of the subject's eye, an input screen for various setting operations, and the like on the display surface 13a. That is, the monitor unit 13 has a display function for displaying various information and an information input function for inputting operation information by the examiner.

[0025] The face support part 20 is provided on the front side (the front side in the Z-axis direction) of the main body part 10 facing the subject, and has a lower part fixed to the main body part 10. That is, the face support part 20 is disposed between the subject and the main body part 10. The face support part 20 of Example 1 has a frame-shaped face support frame 21, a chin rest part 22 disposed inside the face support frame 21, and an electric lifting mechanism 23 that moves the chin rest part 22 up and down.

[0026] As shown in Fig. 1, the face support frame 21 has a pair of side frame parts 21a, 21a arranged side by side in the X-axis direction, an upper frame part 21b that is bridged between the upper ends of the side frame parts 21a, 21a, and a base support part 21c that is substantially T-shaped in a front view and to which the lower ends of the side frame parts 21a, 21a are connected. Here, a forehead rest part 21d is provided in the center of the upper frame part 21b. In addition, the base support part 21c is fixed to the base part 11 of the main body part 10. The electric lifting mechanism 23 is built into the base support part 21c.

[0027] The chin rest 22 protrudes from the upper surface of the base support part 21c and moves up and down by an electric lifting mechanism 23 built into the base support part 21c. During eye examination, the subject sits in front of the ophthalmologic apparatus 1, places his / her chin on the chin rest 22, and places his / her forehead on the forehead rest 21d to fix the position of his / her face.

[0028] The optical system 30 includes optical lenses including an objective lens 31, an imaging element, etc., and acquires (observes, photographs, and measures) ocular information of the anterior segment, cornea, fundus, etc. of the subject eye. A known optical configuration required for acquiring ocular information is applied to the optical system 30, and detailed description thereof will be omitted.

[0029] The control unit 40 has an arithmetic circuit configured with various processors and memories, etc. The various processors include a central processing unit (CPU), a graphics processing unit (GPU), an application specific integrated circuit (ASIC), and a programmable logic device (e.g., simple programmable logic devices (SPLD), complex programmable logic devices (CPLD), and field programmable gate arrays (FPGA)). The various functions of the control unit 40 may be realized by one processor, or may be realized by multiple processors of the same or different types.

[0030] The control unit 40 is connected to the XYZ drive mechanism / drive circuit 14, the monitor unit 13, the optical system 30, the electric lift mechanism 23, etc. The control unit 40 develops a program stored in a storage device (not shown) and comprehensively controls each part of the ophthalmic apparatus 1 based on an operation signal appropriately input via the monitor unit 13.

[0031] 3, in the ophthalmologic device 1 of Example 1, a plurality of (four in this case) general legs 16 and a plurality of (two in this case) suction legs 17 are provided on a bottom surface 11a (bottom surface of the main body 10) of a base portion 11 of the main body 10, and a pair of finger hooks 18, 18 are formed on the circumferential surface of the base portion 11. Furthermore, a plurality of (two in this case) release mechanisms 19 are provided inside the base portion 11.

[0032] The four general leg parts 16 are arranged in two pairs at a predetermined interval in the Z-axis direction, two by two in the X-axis direction, as shown in Fig. 3. Each general leg part 16 has a cushioning member 16a made of a flexible material (nitrile rubber, silicone rubber, fluororubber, etc.) and a screw 16b that fixes the cushioning member 16a to the base part 11.

[0033] 4, the buffer member 16a has a cylindrical shape with one end open and the other end closed, and is disposed with the closed end in contact with the bottom surface 11a of the base portion 11. The screw 16b is a so-called threaded screw, which penetrates the closed end of the buffer member 16a and is inserted into a through hole 11b formed in the bottom surface 11a of the base portion 11. Then, a nut 16c is screwed onto the screw 16b inside the base portion 11, thereby fixing the buffer member 16a to the bottom surface 11a.

[0034] As shown in Fig. 3, the two suction legs 17 are arranged on the rear side of the main body 10 (rear side in the Z-axis direction opposite to the front side) relative to the general legs 16, and are lined up in the X-axis direction. That is, when viewed along the Z-axis direction, the suction legs 17 are arranged on the opposite side of the face support part 10 across the center of gravity of the main body 10. As shown in Fig. 4, each suction leg 17 has a cylindrical bracket part 17a fixed to the base part 11 and an adsorbent 17b attached to the bracket part 17a.

[0035] The bracket portion 17a has a first flange 17c formed at one end and a second flange 17d formed at a midpoint in the length direction. A screw groove 17e is formed on the outer peripheral surface of the bracket portion 17a from the other end to the second flange 17d. The other end of the bracket portion 17a on which the screw groove 17e is formed is inserted into a through hole 11c formed in the bottom surface 11a of the base portion 11, and a nut 17f is screwed into the screw groove 17e inside the base portion 11, thereby fixing the bracket portion 17a to the bottom surface 11a. A rubber cap 17g is attached to the other end of the bracket portion 17a protruding from the nut 17f. The suction leg portion 17 has an air passage 17h that passes continuously through the bracket portion 17a and the rubber cap 17g.

[0036] The suction material 17b is made of an elastic material such as rubber, silicon, or soft polyvinyl chloride, and has a cylindrical portion 17j and a suction cup body 17k. The cylindrical portion 17j has a tubular shape with both ends open, and one end of the bracket portion 17a is inserted into the cylindrical portion 17j to fit between the first flange 17c and the second flange 17d. The suction cup body 17k has a bowl shape in which the center is recessed more than the peripheral edge in a free state (non-suction state) (see Figs. 6 and 7), and the cylindrical portion 17j is formed in the center. The suction cup body 17k also has an adsorption surface 17m on the inside.

[0037] Here, since the bracket portion 17a is inserted into the cylindrical portion 17j, an air passage 17h penetrating the bracket portion 17a and the rubber cap 17g communicates with an enclosed space K surrounded by the suction surface 17m.

[0038] In addition, the protruding length (height) of the general leg 16 and the suction leg 17 from the main body 10 is adjusted, and the distance between the main body 10 and the optical table 100 is set to a size such that, when the ophthalmic device 1 is placed on the optical table 100, the fingers of an operator (a person moving the ophthalmic device 1) cannot get between the main body 10 and the optical table 100 at any position other than the position where the finger hook portion 18 is formed, and the suction leg 17 can be adsorbed to the optical table 100.

[0039] The pair of finger hooks 18, 18 are formed at positions symmetrically arranged in the X-axis direction at the center in the Z-axis direction. Each finger hook 18 is a recessed portion extending continuously from the side surface 11d to the bottom surface 11a of the base portion 11. The length of the finger hook 18 in the X-axis direction (the length of the portion of the finger hook 18 formed on the bottom surface 11a) is set to a length that allows a person's finger to contact the base portion 11 so as to support at least the weight of the ophthalmic device 1. The length of the finger hook 18 in the Y-axis direction (the length of the portion of the finger hook 18 formed on the side surface 11d) is set to a length that prevents at least a finger contacting the base portion 11 from shifting position. Furthermore, the length of the finger hook 18 in the Z-axis direction is set to a length that allows four or more fingers to be hooked, taking into consideration that the position at which the main body portion 10 is supported by different operators. The finger hook 18 may extend over the entire length of the base portion 11 in the X-axis and Y-axis directions.

[0040] The depth of the finger hook 18 is set to a depth that allows the operator's fingertips to fit between the main body 10 and the optical table 100 (top plate 101) without causing any positional shift when the ophthalmic apparatus 1 is placed on the optical table 100. A plurality of protrusions 18b (see FIG. 4) are formed on the inside of the finger hook 18, and multiple fingers (for example, index finger, middle finger, ring finger, and little finger) are divided into sections so that they do not interfere with each other inside the finger hook 18.

[0041] A through hole 18a is formed in the bottom surface 11a of the base portion 11 at a position where the finger hook portion 18 is formed. That is, the through hole 18a is formed on the inside of the finger hook portion 18 (here, the position where the ring finger comes into contact).

[0042] The release mechanism 19 is a mechanism that is operated by an operator when moving the ophthalmic apparatus 1, and releases the suction state of the suction leg portions 17. In the first embodiment, a plurality of (two) release mechanisms 19 are provided in the main body portion 10, and each release mechanism 19 individually releases the suction state of the plurality of (two) suction leg portions 17.

[0043] As shown in FIG. 4, the release mechanism 19 has a handle portion 19a, a compression spring 19b (biasing member), a guide shaft 19c, a guide shaft holder 19d, a guide tube 19e, and a guide tube holder 19f.

[0044] The handle portion 19a has a vertical portion 19g that is bent at its middle portion and extends in the Y-axis direction, and a horizontal portion 19h that extends in the horizontal direction (X-axis direction and Z-axis direction). The handle portion 19a is disposed in such a state that the tip of the horizontal portion 19h faces above the suction leg portion 17, and the vertical portion 19g is inserted into the through hole 18a formed inside the finger hook portion 18. A pressing portion 19j is formed on the lower surface of the vertical portion 19g, and the pressing portion 19j protrudes to the outside of the base portion 11. Therefore, the pressing portion 19j can be contacted by the operator's finger (here, the ring finger) that is hooked on the finger hook portion 18, and the operator presses the pressing portion 19j by hooking the finger on the finger hook portion 18. In other words, the pressing portion 19j of the release mechanism 19 is disposed at a position where the operator can operate the pressing portion 19j with the operator's finger hooked on the finger hook portion 18. In the first embodiment, the pressing portion 19j is disposed at the center in the Z-axis direction of the finger hook portion 18. This allows at least one of the index finger, middle finger, ring finger, and little finger to come into contact with the pressing portion 19j even if the position of the hand hooked on the finger hook portion 18 differs in the Z-axis direction for each worker.

[0045] A recess 19k is formed on the top surface of the vertical portion 19g. Furthermore, a cylindrical insertion plug 19m is provided at the tip of the horizontal portion 19h, opposite to the vertical portion 19g.

[0046] A compression spring 19b is disposed in the recess 19k, and the guide shaft 19c is slidably inserted therein. The upper end of the guide shaft 19c protrudes from the recess 19k and interferes with the guide shaft retainer 19d. This prevents the guide shaft 19c from coming out of the recess 19k. The guide shaft retainer 19d is a gate-shaped member fixed inside the base 11, and is provided to cover the vertical portion 19g.

[0047] The guide tube 19e is a cylindrical member with both ends open, with a rubber cap 17g fitted to one end and an insertion plug 19m slidably inserted into the other end. Here, the guide tube 19e has a larger diameter than the insertion plug 19m, and a gap S is generated between the inner peripheral surface of the guide tube 19e and the outer peripheral surface of the insertion plug 19m. The guide tube 19e passes through the guide tube holder 19f, which prevents the guide tube 19e from shifting out of position. The guide tube holder 19f is a gate-shaped member fixed inside the base portion 11, and is provided to cover the suction leg portion 17.

[0048] The insertion plug 19m is a cylindrical member having a diameter large enough to close the air passage 17h. When the ophthalmic apparatus 1 is placed on the optical table 100, the insertion plug 19m comes into contact with the rubber cap 17g to close the air passage 17h (see FIG. 4). Since a gap S is generated between the inner peripheral surface of the guide tube 19e and the outer peripheral surface of the insertion plug 19m, when the insertion plug 19m separates from the rubber cap 17g to open the air passage 17h, air flows into the air passage 17h through the gap S (see FIG. 6).

[0049] The effects of the ophthalmic apparatus 1 of the first embodiment will be explained as follows.

[0050] 1 and 2, the ophthalmic apparatus 1 of the first embodiment is placed on a top plate 101 of an optical table 100 during use. At this time, a plurality of (four) general legs 16 and a plurality of (two) suction legs 17 contact the top plate 101, and the main body 10 is supported by the general legs 16 and the suction legs 17. In other words, the ophthalmic apparatus 1 is placed on the optical table 100 via the general legs 16 and the suction legs 17.

[0051] 4, the cushioning members 16a of the general legs 16 come into contact with the tabletop 101. As a result, the general legs 16 stably support the main body 10 without damaging the tabletop 101.

[0052] 4, the weight of the ophthalmic device 1 presses the suction material 17b against the top plate 101, and air is released from the sealed space K surrounded by the suction surface 17m. This creates a vacuum in the sealed space K, and the suction surface 17m comes into close contact with the top plate 101. In addition, the handle portion 19a of the release mechanism 19 goes into a natural state (unpressed state), and the insertion plug 19m comes into close contact with the rubber cap 17g due to the reaction force of the compression spring 19b, and the air passage 17h is closed by the insertion plug 19m. As a result, the suction state of the suction material 17b is maintained, and the suction leg portion 17 is suctioned to the top plate 101.

[0053] In the ophthalmic device 1 of the first embodiment, the suction leg 17 is attached to the top plate 101, so that even if an unintended pulling force acts on the face support unit 20 and the balance of the center of gravity of the main body unit 10 is lost, a part of the main body unit 10 can be prevented from floating up. As a result, in the ophthalmic device 1 of the first embodiment, even if an unintended load acts on the main body unit 10 and the balance of the center of gravity of the main body unit 10 is lost, a part of the general leg 16 does not float up and the main body unit 10 does not become unstable, and the main body unit 10 can be maintained in a stable state when placed on the optical table 100. Note that the "scene in which an unintended pulling force acts on the face support unit 20" is, for example, a scene in which the subject grabs the face support frame 21 or the chin support 22 of the face support unit 20, or stands up from a chair in front of the ophthalmic device 1 using the face support unit 20 as support.

[0054] Furthermore, in the ophthalmic apparatus 1 of the first embodiment, since the suction legs 17 are attached to the optical table 100, when vibration occurs in the main body 10, the vibration can be suppressed by the weight of the optical table 100. Therefore, the ophthalmic apparatus 1 of the first embodiment can be made less susceptible to vibration.

[0055] Assuming that the weight acting on the ophthalmic apparatus 1 of the first embodiment and the dimensions of the ophthalmic apparatus 1 are as follows (see FIG. 5), the suction force of the suction legs 17 needs to be about 20 kgf to 40 kgf. The center of gravity α of the ophthalmologic apparatus 1 is set at the center of the four general legs 16 . The weight of the ophthalmic apparatus 1, 20 kg, acts on the center of gravity α of the ophthalmic apparatus 1. An arbitrary position β of the face support portion 20 is pulled downward by a force F2 of 62 kgf, which is the global average body weight of an adult. The distance L1 between the general legs 16 in the Z-axis direction is 270 mm. The distance L2 in the Z-axis direction from the general leg portion 16 arranged on the front side of the main body portion 10 to an arbitrary position β of the face support portion 20 is 135 mm.

[0056] That is, when a force F1 of 20 kgf acts on the center of gravity position α of the ophthalmic device 1 and a force F2 of 62 kgf acts on an arbitrary position β of the face support part 20, the force acting on the suction leg part 17 is defined as "F [kgf]." Then, from the above conditions and balance of the moments, the force F [kgf] is calculated by the following formula (1). 62[kgf]×135[mm]=20[kgf]×270 / 2[mm]+F[kgf]×270[mm] ···(1) From the above formula (1), F=21 [kgf] is calculated. Taking into account a safety factor of up to about twice, it is found that the suction force of the suction leg 17 needs to be about 20kgf to 40kgf.

[0057] Generally, the suction force W [N] of a vacuum suction pad is calculated by the following formula (2). W=C×P / 101×10.13×f (2) Where, W: Adsorption force [N] C: Pad area [cm 2 ] P: Vacuum pressure [-kPa] f: safety factor

[0058] Assuming that the vacuum pressure P is 60 kPa and the safety factor f is 9.81, the area C [cm] of the adsorption surface 17m of the adsorbent 17b required to generate an adsorption force of 40 kgf based on the above formula (2) is 2 ] is calculated by the following formula (3). Furthermore, the area C [cm 2 ] is calculated, and the diameter D [mm] of the adsorption surface 17m of the adsorbent 17b is calculated by the following formula (4). Adsorption surface area C=40×9.81×101 / 60 / 10.13 (3) Diameter of the adsorption surface D = √(4 / pi × C × 100) (4) Specifically, the area C [cm] of an adhesive surface of 17 m required to generate an adhesive force of 40 kgf is calculated from equation (3). 2 ] is 65.2cm 2 From formula (4), the diameter D [mm] of the suction surface 17m required to generate a suction force of 40 kgf is 91 mm. In Example 1, the bracket portion 17a is inserted into the center of the suction surface 17m, and the suction surface 17m has a doughnut shape surrounding the bracket portion 17a. However, in the above formulas (1) to (4), the bracket portion 17a is ignored and it is assumed that the suction surface 17m is circular.

[0059] The diameter D [mm] of the suction surface 17m required to generate an adhesive force of 40 kgf is 91 mm, and since two adhesive legs 17 are attached to the main body 10 in Example 1, it can be said that the adsorbent 17b in Example 1 needs to have a diameter of about 45 mm in order to maintain a stable state of the main body 10 under the above conditions. In other words, by using the adsorbent 17b with a diameter of about 45 mm for the adhesive legs 17 in Example 1, an adhesive force of 40 kgf can be ensured, and even if an unintended load acts on the main body 10, the adhesive state of the adhesive legs 17 is not easily released, and the stable state of the main body 10 can be maintained.

[0060] When the ophthalmic apparatus 1 of the first embodiment is moved manually, first, the operator holds the main body 10 from the front or rear of the main body 10 and inserts a finger Fin between the main body 10 and the optical table 100. Then, the operator places the finger Fin on each of the pair of finger hooks 18, 18 formed on the base 11, as shown in FIG.

[0061] At this time, inside the finger hook 18, a pressing portion 19j formed on the handle portion 19a of the release mechanism 19 protrudes outside the base portion 11. Therefore, when an operator hooks a finger Fin on the finger hook 18, the operator's fingertip comes into contact with the pressing portion 19j. Then, when the operator tries to lift the ophthalmic device 1, the pressing portion 19j is pressed, and the vertical portion 19g of the handle portion 19a is pushed into the inside of the base portion 11 against the reaction force of the compression spring 19b.

[0062] As a result, the insertion plug 19m provided on the horizontal portion 19h of the handle portion 19a moves toward the inside of the base portion 11, and the insertion plug 19m separates from the rubber cap 17g. When the insertion plug 19m separates from the rubber cap 17g and the ventilation passage 17h is opened, air flows into the ventilation passage 17h through the gap S, as shown by the arrow in FIG.

[0063] Furthermore, the air that has flowed into the air passage 17h flows through the air passage 17h into the sealed space K, and the sealed space K is no longer in a vacuum state. Therefore, the suction cup body 17k is pressed from inside the sealed space K and deforms into a bowl shape, causing a gap between the top plate 101 and the suction surface 17m. As a result, the suction legs 17 are detached from the top plate 101. Then, with the suction legs 17 detached, the ophthalmic apparatus 1 becomes movable from the optical table 100, and as shown in FIG. 7, the operator can lift the main body 10 from the optical table 100 to move the ophthalmic apparatus 1.

[0064] In this way, in the ophthalmic apparatus 1 of the first embodiment, the pressing portion 19j of the release mechanism 19 protrudes inward from the finger hook portion 18 and is disposed at a position where the operator can operate the release mechanism 19 with his / her finger hooked on the finger hook portion 18. Therefore, when moving the ophthalmic apparatus 1, the operator can press the pressing portion 19j by simply hooking his / her finger on the finger hook portion 18 to release the suction state of the suction leg portion 17. In other words, the operator does not need to shift or release the position of the hand supporting the ophthalmic apparatus 1 in order to release the suction state of the suction leg portion 17. Therefore, the ophthalmic apparatus 1 of the first embodiment can be easily moved in a stable state.

[0065] In the ophthalmologic apparatus 1 of Example 1, the face support unit 20 is disposed between the subject and the main body unit 10, and is provided on the front side of the main body unit 10. The suction leg unit 17 is provided on the bottom surface 11a on the back side of the main body unit 10 opposite the front side, and is disposed on the opposite side of the face support unit 20 across the center of gravity of the main body unit 10 when viewed along the Z-axis direction.

[0066] Therefore, it is possible to ensure a large distance in the Z-axis direction from the face support unit 20, on which unintended loads are likely to act, to the suction legs 17. This makes it possible to improve the stability of the main body unit 10 placed on the optical table 100.

[0067] In the ophthalmologic apparatus 1 of the first embodiment, the suction leg portion 17 has a suction cup-shaped suction material 17b that is suctioned to the top plate 101 of the optical table 100, and a bracket portion 17a having an air passage 17h that can introduce outside air inside the suction material 17b, and is fixed to the base portion 11 of the main body portion 10 via the bracket portion 17a. The release mechanism 19 has a handle portion 19a that is capable of closing the air passage 17h and opens the air passage 17h when pressed by an operator, and a compression spring 19b (biasing member) that biases the handle portion 19a in the closing direction of the air passage 17h.

[0068] As a result, when an operator places a finger on the finger hook portion 18 to lift the ophthalmic apparatus 1, the fingertip automatically comes into contact with the pressing portion 19j of the release mechanism 19. Then, when the operator tries to lift the ophthalmic apparatus 1 from below, the pressing portion 19j is pressed in, and the air passage 17h is opened. In this manner, the operator can press the pressing portion 19j to release the suction state of the suction leg portion 17 without removing or shifting his / her finger from the finger hook portion 18. As a result, the ophthalmic apparatus 1 of the first embodiment can achieve stability when the ophthalmic apparatus 1 is placed and ease of release of the suction leg portion 17 with a simple configuration.

[0069] In the ophthalmologic apparatus 1 of the first embodiment, a plurality (two) of suction leg portions 17 are provided on the main body portion 10. A plurality (two) of release mechanisms 19 are provided on the main body portion 10, and each release mechanism 19 individually releases the suction state of each of the plurality (two) of suction leg portions 17.

[0070] Thereby, the ophthalmic apparatus 1 of the first embodiment can individually release the suction state of the plurality of suction legs 17. Therefore, the ophthalmic apparatus 1 of the first embodiment can suppress the loss of the weight balance of the main body 10 when the suction state of the suction legs 17 is released, and can move the main body 10 in a more stable state.

[0071] The above describes the ophthalmic device of the present disclosure based on Example 1. However, the specific configuration is not limited to this Example, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim.

[0072] In the ophthalmologic apparatus 1 of the first embodiment, an example has been shown in which a plurality (two) of release mechanisms 19 are provided in a way that corresponds individually to a plurality (two) of suction leg portions 17. However, a single release mechanism 19 may be used to simultaneously release the suction state of a plurality of suction leg portions 17. That is, for example, the tip of a horizontal portion 19h of a single handle portion 19a may be branched into a plurality of tips, and the branched tips may be disposed so as to face above the plurality of suction leg portions 17, respectively.

[0073] In this case, it is impossible for the adhesive state of some of the adhesive legs 17 to be released while the other adhesive legs 17 remain attached. This prevents the operator from accidentally moving the ophthalmic apparatus 1 due to the adhesive state of some of the adhesive legs 17 being released, which can cause the weight balance of the main body 10 to become unstable during the movement.

[0074] In the ophthalmic apparatus 1 of the first embodiment, a pair of finger hooks 18 are formed at positions symmetrically arranged in the X-axis direction at the center of the main body 10 in the Z-axis direction. However, the number of finger hooks 18 and their positions are not limited to those of the first embodiment. For example, as in an ophthalmic apparatus 1A of a first modified example shown in Fig. 8, two finger hooks 18 may be formed on each of the front and rear surfaces of the main body 10. In this case, the ophthalmic apparatus 1A is moved by two operators.

[0075] In addition, the ophthalmic device 1 of the first embodiment has been shown to have a plurality of (four) general legs 16 and a plurality of (two) suction legs 17. However, the suction legs 17 may be provided in the main body 10 of the ophthalmic device 1 in place of the general legs 16. In other words, the general legs 16 do not necessarily have to be provided, and all of the plurality of (four) general legs 16 may be changed to the suction legs 17.

[0076] Also, some of the multiple (four) general legs 16 (for example, the two general legs 16 disposed near the rear surface of the main body 10) may be used as the suction legs 17.

[0077] Furthermore, it is not necessary to provide a plurality of suction leg portions 17. In other words, only one suction leg portion 17 may be provided, for example, at the center position of the bottom surface 11a of the base portion 11.

[0078] Further, in the ophthalmic apparatus 1 of the first embodiment, an example has been shown in which the pressing portion 19j of the release mechanism 19 protrudes to the inside of the finger hook portion 18. However, the arrangement position of the pressing portion 19j is not limited to the inside of the finger hook portion 18. The pressing portion 19j may be operable when an operator places his / her fingers on the finger hook portion 18. That is, for example, as in the ophthalmic apparatus 1B of a second modified example, a part of which is shown in FIG. 9, the pressing portion 19j may be exposed to the side surface 11d of the base portion 11 and provided at a position where an operator can remove some of his / her fingers from the finger hook portion 18 and operate the pressing portion 19j when he / she places his / her fingers on the finger hook portion 18.

[0079] In the ophthalmic device 1 of the first embodiment, the suction leg 17 removes air from the sealed space K inside the adsorbent 17b by the weight of the main body 10 to create a vacuum, and the release mechanism 19 presses the handle 19a to allow air to flow into the sealed space K and release the adsorbed state. However, the configurations of the suction leg 17 and the release mechanism 19 are not limited to this. The suction leg 17 may be configured to, for example, create a vacuum in the sealed space K using a vacuum generator to adsorb the adsorbent 17b. Also, the release mechanism 19 may be configured to allow air to flow into the sealed space K using an electric blower.

[0080] In the ophthalmic device 1 of the first embodiment, when the pressing portion 19j of the handle portion 19a of the release mechanism 19 is pressed and the vertical portion 19g is pushed in, the insertion plug 19m moves toward the inside of the base portion 11 to open the air passage 17h. However, the structure of the release mechanism 19 is not limited to this. For example, the release mechanism 19 may have a valve structure in which the horizontal portion 19h performs a seesaw motion around a midpoint, and when the vertical portion 19g is pushed in, the insertion plug 19m moves downward to open the air passage 17h. [Explanation of symbols]

[0081] 1 Ophthalmology equipment 10 Main body 20 Face support 30 Optical system 16 General legs 17 Suction legs 17a Bracket part 17b Adsorbent 18 Finger rest 19 Release mechanism 19a Handle 19b Compression spring (biasing member)

Claims

1. An ophthalmologic apparatus comprising: an optical system for acquiring ocular information of a subject's eye; a main body portion incorporating the optical system and placed on an optical table; and a face support portion for supporting a face of the subject when acquiring the ocular information, the ophthalmologic apparatus being movable from the optical table, the main body includes a finger hook on which an operator places his / her fingers when moving the main body, an adhesive foot that can be attached to a top plate of the optical table, and a release mechanism that is operated by the operator to release the adhesive state of the adhesive foot, The release mechanism is disposed at a position where the operator can operate it with the finger hook portion. An ophthalmic apparatus comprising:

2. 2. The ophthalmic apparatus according to claim 1, the face support portion is disposed between the subject and the main body portion, The suction leg is disposed on the opposite side of the face support across the center of gravity of the main body. An ophthalmic apparatus comprising:

3. In the ophthalmic apparatus according to claim 1 or 2, the suction leg portion includes a suction cup-shaped suction material that is attached to the top plate, and a bracket portion having an air passage that can introduce outside air into the inside of the suction material, and is fixed to the main body portion via the bracket portion; the release mechanism includes a handle portion that closes the air passage and opens the air passage when pressed by the operator, and a biasing member that biases the handle portion in a direction in which the air passage is closed, The handle portion has a pressing portion that is pressed by the operator and is provided on the finger hook portion. An ophthalmic apparatus comprising:

4. In the ophthalmic apparatus according to claim 1 or 2, The suction leg portion is provided on the main body portion in a plurality of positions, The release mechanism is provided in a plurality of parts on the main body and individually releases the suction state of each of the plurality of suction legs. An ophthalmic apparatus comprising:

5. In the ophthalmic apparatus according to claim 1 or 2, The suction leg portion is provided on the main body portion in a plurality of positions, The release mechanism is capable of releasing a plurality of the suction legs simultaneously. An ophthalmic apparatus comprising:

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