JP5522633B2 - Optometry equipment - Google Patents

Description

  The present invention relates to an optometry apparatus for subjectively examining (measuring) near vision or the like of a subject's eye.

  A subjective optometry apparatus (phoropter, refractor) having a pair of left and right lens chamber units each provided with an examination window is known. In such an apparatus, a target plate (target presentation unit) having a near target printed on a near bar (near point bar) extending from the apparatus to the front side (the side opposite to the side where the subject is present) is provided. It is installed and a near-field inspection is performed. The target plate is attached so as to be movable in the axial direction of the near bar (see Patent Document 1).

Japanese Patent Laid-Open No. 10-272099

  A scale and a numerical value indicating the distance from the optometry apparatus are displayed (applied) on the near bar, and the examiner reads (confirms) the scale and the numerical value to move the position of the moved optotype plate. And is used for inspection (measurement) of the refractive power, accommodation power, etc. of the subject's eye. The scales and numerical values of the near bars differ from region to region. For example, there are scales in centimeters (hereinafter referred to as centimeters) and scales in inches. In order to deal with these two types (plural types) of scales and numerical values, there are the following methods. The first is a method of displaying a scale in centimeters on one side of the near bar, and displaying a scale in inches on the other (opposite) side. However, in this case, the centimeter scale and the inch scale can be read only from one side of the near bar (cannot be confirmed). The position where the examiner stands with respect to the apparatus varies depending on the installation environment of the apparatus, the handedness of the examiner, and the like. For this reason, there are cases in which the scale and numerical value display of such a near bar is not convenient. The second is a method of displaying both a centimeter scale and an inch scale on both sides of the near bar. However, in this case, even if the color of the scale or the like is changed, the scale or the like may be misread. In addition, since the near-use bar is a thin bar in the first place, it is difficult to decipher if two types (multiple types) of scales are superimposed and displayed. The third type is a centimeter scale, with two types of near sight bars, a near sight bar with centimeter scales and a near bar with inch scales. Is displayed on both sides of the centimeter-use bar, and scales in inches are displayed on both sides of the inch-side bar. However, preparing two types (plural types) of near-use bars increases the cost. In addition, there is a possibility that the type of the near bar is mistaken when the device is shipped.

  In view of the above-described problems of the conventional technology, the present invention has a near-use bar that displays scales and numerical values of different units depending on the region, regardless of the installation environment, while keeping costs down. An object of the present invention is to provide an optometry apparatus in which the position of the sign presentation unit) can be easily confirmed.

In order to solve the above-mentioned problems, the present invention has the following configuration.
(1) In an optometry apparatus having an optotype presenting unit that presents a near visual target, a near rod on which the optotype presenting unit is slidably mounted, and a holding unit that holds the near rod. The near bar is a distance display unit in which a plurality of types of scales representing the distance are separately provided on the surface thereof, and a base for holding the near bar in the holding unit, the distance display And a base portion provided with a positioning portion for being held by the holding portion so that the orientation of the portion can be changed.
In optometry apparatus (2) (1), the distance display section, the scale of the different units, a plurality and numerical for reading said scale, the is marked the surface, the positioning unit, the In order to be able to read any of the numerical values, the near bar is rotated and the shape of the surface is changed so that it can be held by the holding portion.
(3) In the optometry apparatus according to (1) or (2) , the distance display unit is provided with a first surface with a scale and a numerical value of the first unit, a scale and a numerical value of the first unit , A second surface which is a surface different from the first surface, and a scale and a numerical value of a second unit different from the first unit are attached , and a third surface which is different from the first surface and the second surface . the surface, scale and numerical values of the second unit is attached, and a fourth surface which is a surface different from that of the first to third surface, characterized in that.
(4) In the optometry apparatus according to (3) , in the distance display unit, the first surface and the third surface are disposed on opposite sides with respect to a central axis of the near-field bar, and The numerical value of the first unit attached to the surface and the numerical value of the second unit attached to the third surface are attached upside down, and the second surface and the fourth surface are the center. The numerical values of the first unit attached to the second surface and the numerical values of the second unit attached to the fourth surface are attached upside down. It is characterized by that.

  According to the present invention, the position of the optotype plate (target presentation unit) can be reduced by having a near-use bar displaying scales and numerical values of different units depending on regions, regardless of the installation environment, while suppressing costs. Can be easily confirmed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an optometry apparatus 100 according to the present embodiment. An optometry apparatus 100 for inspecting a visual function such as visual acuity of a subject's eye subjectively includes a pair of left and right symmetrical lens chamber units 50L and 50R (a left lens chamber unit 50L and a right lens chamber unit 50R), and a lens. A support unit 51 that suspends and supports the chamber units 50 </ b> L and 50 </ b> R, and is supported by the arm 10. In the lens chamber units 50L and 50R, a lens disk in which a large number of optical elements such as spherical lenses, cylindrical lenses, and auxiliary lenses such as polarizing plates are arranged on the same circumference is rotatably held. Optical elements are switched and arranged in inspection windows 52L and 52R (left inspection window 52L and right inspection window 52R) provided in the chamber units 50L and 50R. Switching of the optical elements disposed in the inspection windows 52L and 52R is performed by operating a controller (operation unit) 60. Further, the support unit 51 includes an interval adjustment mechanism (including a convergence mechanism) between the lens chamber units 50L and 50R for changing the interval between the left examination window 52L and the right examination window 52R in accordance with the distance between the pupils of the subject. I have.

  The visual target presentation unit 40 for presenting the near visual target (near vision chart) is suspended from the near visual stick (neighbor bar) 20. The near bar 20 is held by a holding portion 55 provided in the center of the support unit 51, and extends from the optometry apparatus 100 to the front side (the side opposite to the side where the subject is present).

  The optotype presenting unit 40 of this embodiment includes a case 41 provided with a presenting window 42, an optotype disc 43, and a holder 44 that holds the case 41. The target disc 43 on which a plurality of types of near targets are displayed (printed) is housed in the case 41 so as to be rotatable around a pin 45 at the center of the case 41. A part of the target disc 43 is exposed from the case 41, and the target near target is arranged in the presentation window 42 by rotating the target disc 43 with the exposed portion. The holder 44 has a function for attaching the optotype presenting unit 40 to the near bar 20 and supporting the optotype presenting unit 40 so as to be slidable on the near bar 20 (movable in the axial direction of the near bar 20). have. In addition, the structure of the holder 44 can utilize the technique of Unexamined-Japanese-Patent No. 2004-202052. The target presentation unit 40 may be a target plate on which a near target is simply printed, or may be a thin liquid crystal display that displays a near target.

  The near rod 20 of the present embodiment is a thin hexagonal rod-shaped member, and is a hexagonal rod-shaped rod that also serves as a substantially cylindrical base portion 21 held by the holding portion 55 and a support member that supports the visual target presentation unit 40. Distance display unit 30 (see FIG. 2). The distance display unit 30 displays (prints) a scale for confirming the distance (target presentation distance) from the lens chamber units 50L and 50R (support unit 51) to the target presentation unit 40. Although details will be described later, the distance display unit 30 of the present embodiment is provided with scales corresponding to different unit systems (in this embodiment, two types of centimeter (hereinafter, centimeter) units and inch units). Yes. In addition, the distance display unit 30 has a configuration in which the examiner can check the scale of either unit system when viewed from either the left side (arrow L side) or the right side (arrow R side) of the near bar 20. ing.

  Details of the near bar 20 will be described. FIG. 2 is a schematic external view of the near bar 20. 3 is a partial side view of the near bar 20, FIG. 3 (a) is a view seen from the arrow R side in FIG. 2, and FIG. 3 (b) is the arrow L side in FIG. It is the figure seen from. FIG. 4 is a view of the near bar 20 viewed from the rear side (base 21 side).

  The near bar 20 has a base 21 side as a base end, and a distance display unit 30 having a length of about 70 centimeters from the distal end (base end) side of the base 21 to the distal end of the near bar 20 which is the opposite end. And the base 21 are integrally formed members. In the present embodiment, the distance display unit 30 includes scaled surfaces (four surfaces of hexagonal columns: the first surface 31 to the fourth surface 34). The first surface 31 includes a scale 31a in centimeters, and a numerical value 31b that is a numerical value indicating the position of the scale 31a and is attached in a direction that can be read when viewed from the right side (arrow R side). The second surface 32 includes a scale 32 a in centimeters, and a numerical value 32 b that is a numerical value indicating the position of the scale 32 a and is attached in a direction that can be read when viewed from the left side (arrow L side). The first surface 31 and the second surface 32 are arranged adjacent to each other in the hexagonal column. As shown in FIG. 3A, when the second surface 32 is viewed from the direction in which the first surface 31 can be read, the scale 32a is the same as the scale 31a, but the numerical value 32b is inverted upside down with respect to the numerical value 31b. Yes.

  On the other hand, the 3rd surface 33 is provided with the scale 33a of an inch unit, and the numerical value 33b attached | subjected to the direction which is a numerical value which shows the position of the scale 33a, and can be read seeing from the right side (arrow R side). The third surface 33 includes a scale 33c for confirming the diopter, and a numerical value 33d attached in a direction that can be read when viewed from the right side (arrow R side). The fourth surface 34 includes a scale 34a in inches and a numerical value 34b which is a numerical value indicating the position of the scale 34a and attached in a direction that can be read when viewed from the left side (arrow L side). Further, the fourth surface 34 includes a scale 34c for confirming the diopter, and a numerical value 34d attached in a direction that can be read when viewed from the left side (arrow L side). The third surface 33 and the fourth surface 34 are arranged adjacent to each other in the hexagonal column. As shown in FIG. 3B, when the third surface 33 is viewed from the direction in which the fourth surface 34 can be read, the scale 33a (33c) is the same as the scale 34a (34c), but the numerical value 33b (33d) is The numerical value 34b (34d) is vertically inverted.

  The base 21 includes concave portions 22 and 23 that are positioning portions for fixing the orientation of the near rod 20 when the near rod 20 is held by the holding portion 55. The recesses 22 and 23 are provided on the opposite sides with respect to the central axis of the base 21.

  As shown in FIG. 4, the first surface 31 and the third surface 33 are provided on the opposite sides with respect to the central axis of the near bar 20. Yes. Similarly, the second surface 32 and the fourth surface 34 are provided on opposite sides of the central axis of the near bar 20. The relationship between the first surface 31 to the fourth surface 34 and the recesses 22 and 23 (the respective bottom surfaces thereof) is determined as follows. That is, the recesses 22 and 23 (each bottom surface), and a plane H passing through the boundary line A between the first surface 31 and the second surface 32 and the boundary line B between the third surface 33 and the fourth surface 34, It is almost parallel. Thereby, when the near rod 20 is held by the holding portion 55, the orientation of the near rod 20 is positioned so that the plane H is horizontal regardless of which of the recesses 22 and 23 is screwed.

  Next, the configuration of the holding unit 55 and the holding (fixing) of the near bar 20 will be described. FIG. 5 is a cross-sectional view showing a state in which the near bar 20 is held by the holding portion 55. As shown in the drawing, the base 21 is housed in the inner cylinder portion 55a of the holding portion 55 (inserted to the back). In this state, when the screw 55b is tightened and lowered, the screw head of the screw 55b and the recess 22 or 23 come into contact (engagement), and the base 21 is pressed by the screw 55b to determine the orientation of the base 21. When the recess 22 is upward, the first surface 31 (numerical value 31b) is in a direction that can be read when viewed from the right side (arrow R side), and the fourth surface 34 (numerical value 34b) is the direction that can be read when viewed from the left side (arrow L side). It becomes. Further, when the recess 23 is upward, the third surface 33 (numerical value 33b) is in a direction that can be read when viewed from the right side (arrow R side), and the second surface 32 (numerical value 32b) is viewed from the left side (arrow L side). It becomes the direction which can be read.

  In FIG. 5, the screw 20 is fastened from above to fix the near rod 20 (base portion 21) to the holding portion 55, but the screw is tightened from below to hold the near rod 20 (base portion 21) in the holding portion. The near rod 20 (base portion 21) may be fixed to the holding portion 55 by tightening the screw from both the upper and lower sides and the left and right sides. That is, the position of screwing is not particularly limited.

  Further, the base 21 may be held (positioned) by a ball spring 57 instead of a screw (see FIG. 6). The position of the ball spring is not particularly limited. When the near rod 20 (base portion 21) is held by a ball spring, the ball spring has a spring force that does not fall off due to the weight of the near rod 20 and the target presentation unit 40.

  The near bar 20 held by the holding part 55 can be rotated up to the center of the pin 55c and be flipped up. Thereby, the optotype presenting unit 40 and the like are retracted from the field of view of the subject's eye during the distance test.

  A case where a near-field inspection is performed in the apparatus having the above configuration will be described. In the following, the examiner shall confirm the position of the optotype presenting unit 40 on the near bar 20 in centimeters, and shall stand (position) on the right side (arrow R side) of the optometry apparatus 100. . The examiner installs the target presentation unit 40 and the like prior to the examination. First, the base portion 21 is inserted into the holding portion 55 (inner cylinder portion 55a) with the concave portion 22 facing upward. Next, the near bar 20 is held by the holding portion 55 by tightening the screw 55b. Then, the holder 44 of the optotype presenting unit 40 is inserted through the rod 20. In this manner, the installation of the target presentation unit 40 and the like is completed.

  Next, the examiner operates the controller 60 to examine (measure) the refractive power of the subject's eye. Then, corrective lenses corresponding to the subject's eyes are arranged in the inspection windows 52R and 52L. When performing a near-field examination, the examiner adjusts the distance between the left and right lens chamber units 50L and 50R according to the distance between the pupils of the subject and the like. Moreover, the near bar 20 is leveled, and the optotype presenting unit 40 is arranged in front of the subject. The examiner slides the holder 44 with respect to the near rod 20 and slowly moves the optotype presenting unit 40 toward the examinee's eye from around 50 cm in front of the examinee's eye. The near vision target of the target disk 43 is shown. Then, when the subject becomes aware of the blurring of the near vision target (when the near vision target appears to be blurred to the subject's eyes), the movement of the target presentation unit 40 is stopped, and the vision target at this time The position (presentation distance) of the presentation unit 40 is read (confirmed) from the scale 31 a and the numerical value 31 b attached to the first surface 31. Based on this, the adjustment power of the subject's eye is required.

  On the other hand, when the examiner stands (positions) on the right side (arrow R side) of the optometry apparatus 100 and confirms the position of the optotype presenting unit 40 on the near bar 20 in inches, the concave portion 23 is directed upward. The base portion 21 is inserted into the holding portion 55, the screw 55 b is tightened, and the near rod 20 is held by the holding portion 55. Thus, during the near-field inspection, the examiner moves the target presentation unit 40 in the same procedure as described above, and the scale 33a and the numerical value 33b attached to the third surface 33 indicate the position of the target presentation unit 40. Read from (confirm).

  In addition, when reading the scale etc. from the left side (arrow L side) of the optometry apparatus 100 (confirmation), it carries out as follows. In the case of a centimeter unit, the near rod 20 is held by the holding portion 55 with the concave portion 23 facing upward so that the scale 32 a and the numerical value 32 b attached to the second surface 32 can be read. In the case of inch units, the near bar 20 is held by the holding portion 55 with the concave portion 22 facing upward so that the scale 34 a and the numerical value 34 b attached to the fourth surface 34 can be read.

  As described above, the position of the optotype presenting unit 40 can be confirmed in centimeters or inches, regardless of which side of the optometry apparatus 100 is standing (positioned) and performing a near-field examination. In other words, regardless of the installation environment, it is possible to easily check the scales and numerical values of different units depending on the region. Since the above correspondence can be performed by the near bar 20, it is not necessary to prepare a near bar corresponding to centimeters and a near bar corresponding to inch units, and the cost can be suppressed.

  The present invention can be modified as follows. FIG. 7 is a diagram for explaining a modification example of a near bar, FIG. 7 (a) is a side view seen from the right side (arrow R side), and FIG. 7 (b) is a rear side (base side side). ).

  The near bar 70 includes a base 71 and a distance display unit 80. The base portion 71 includes a positioning portion 72. The distance display unit 80 includes a first surface to a fourth surface on the surface of the hexagonal column, similarly to the near bar 20 (distance display unit 30). As shown in FIG. 7 (a), the near bar 70 (distance display unit 80) has a first surface 81 with a scale 81a and a numerical value 81b in centimeters, and a scale 83a and a numerical value 83b in inches. The third surface 83 is disposed adjacent to the third surface 83. The numerical value 81b of the first surface 81 and the numerical value 83b of the third surface 83 are both in a direction that can be read when viewed from the right side (arrow R side). Although not shown in the figure, the second surface with a centimeter scale and a numerical value and the fourth surface with an inch scale and a numerical value are arranged adjacent to each other. The numerical values on the second surface and the fourth surface are in a direction that can be read when viewed from the left side (arrow L side).

  As shown in FIG. 7B, the positioning portion 72 is a hexagonal column so as to match the hexagonal column surface of the distance display unit 80. As a result, any of the first surface 81 and the third surface 83 can be read from the upper right side, and any of the second and fourth surfaces can be read from the upper left side. Can be oriented.

  In the above description, the scales and numerical values of the first surface to the fourth surface are printed on the near bar (distance display unit). However, the near bar (distance display unit) has a scale and the like. It is good also as a structure by which the printed seal | sticker is affixed.

  In the above description, the near rod is a hexagonal rod-shaped member, but it may be a polygonal column (for example, a quadrangular column) or a cylindrical rod-shaped member. In this case, the number of faces of the polygonal column is preferably an even number considering that the near bars are confirmed from the right side and the left side.

It is a schematic block diagram of the optometry apparatus of this embodiment. It is a schematic external view of a near bar. It is a partial side view of a near bar. It is the figure which looked at the near bar from the back side (base side). It is a cross-sectional view showing a state where the near bar is held by the holding unit. It is a figure explaining the example of a change of a holding part. It is a figure explaining the example of a change of a near bar.

20 near rod 21 base 30 distance display portion 31 first surface 32 second surface 33 third surface 34 fourth surface 40 optotype presenting unit 50L, 50R lens chamber unit 55 holding portion 70 near rod 100 optometry apparatus

Claims (4)

In an optometry apparatus having an optotype presenting unit that presents a near visual target, a near rod on which the optotype presenting unit is slidably mounted, and a holding unit that holds the near rod.
The near bar is a distance display unit in which a plurality of types of scales representing distances are separately provided on a surface thereof, and a base for holding the near bar in the holding unit. A base including a positioning unit for being held by the holding unit so that the orientation of the display unit can be changed;
Having
An optometry apparatus characterized by that. The optometry apparatus of claim 1,
The distance display unit includes a plurality of scales with different types of scales and numerical values for reading the scales.
The positioning portion has a shape that can be held by the holding portion in a state in which the near bar is rotated and the orientation of the surface is changed in order to be able to read any of the numerical values.
An optometry apparatus characterized by that. The optometry apparatus according to claim 1 or 2 ,
The distance display unit includes a first surface with a scale and a numerical value of a first unit;
A second surface having a scale and a numerical value of the first unit and different from the first surface ;
A third surface having a scale and a numerical value of a second unit different from the first unit, and being a surface different from the first surface and the second surface ;
A fourth surface with a scale and a numerical value of the second unit, which is a surface different from the first to third surfaces ;
An optometry apparatus comprising: The optometry apparatus of claim 3 ,
In the distance display section,
The first surface and the third surface are disposed opposite to each other with respect to the central axis of the near bar, and the first unit numerical value attached to the first surface and the third surface It is attached upside down with the numerical value of the second unit attached,
The second surface and the fourth surface are disposed opposite to each other with respect to the central axis, and the numerical value of the first unit attached to the second surface and the second surface attached to the fourth surface. The numerical value of the unit of 2 is attached upside down,
An optometry apparatus characterized by that.

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