JP3886428B2 - A subjective optometry device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optometry apparatus capable of performing subjective optometry with trial frame wearing sensation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a subjective optometry apparatus has a refractor (a subjective optometer) and a controller. The refractor is suspended and placed in front of the subject's eyes. 2. Description of the Related Art A subjective optometry apparatus that presents a visual target and performs a visual acuity test is known.
[0003]
A rotating disk and a driving mechanism for the rotating disk are provided in the case of the reflector, and a circular opening is formed in the rotating disk. Various kinds of elements such as a spherical power lens, an astigmatic lens, and a red filter are formed in the circular opening. The inspection optical elements are arranged.
[0004]
The examiner operates the controller, controls the drive mechanism of the rotating disk according to the examination procedure, sets the examination optical element in the examination window, and performs a series of visual acuity examinations according to the subject's response to the examiner's questions. (See Japanese Patent Application No. 2000-346302).
[0005]
[Problems to be solved by the invention]
However, this conventional subjective optometry device is inconvenient because the eye is away from the optometry window when the subject changes his posture or moves his face a little. In addition, the refractor of this type of subjective optometry apparatus is generally large, and the refractor is interposed between the examiner and the subject so as to block the view of the subject. There is a problem that it is difficult to communicate and communication is difficult.
[0006]
On the other hand, in the method of performing a visual acuity test with a subject wearing a trial frame, the examiner needs specialized knowledge, which hinders examination efficiency.
[0007]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a subjective optometry apparatus capable of performing optometry with a trial frame wearing sensation.
[0008]
[Means for Solving the Problems]
The subjective optometry apparatus according to claim 1 is an Alvarez lens that includes a pair of optical elements and that continuously changes refractive characteristics by relatively displacing the pair of optical elements with respect to the optical axis of the optometry window. A subjective optometry unit provided inside and provided with at least a drive mechanism for driving the pair of optical elements; and a controller for controlling the subjective optometry unit;
The subjective optometry unit includes a left-eye optometry unit, a right-eye optometry unit, and a left-eye optometry unit for adjusting a distance between a pair of optometry windows according to a distance between pupils of a subject. A support body that can adjust the distance in the left-right direction with respect to the right-eye optometry unit, a wearing member that is provided on the support body and that wears the subjective optometry unit on the head of the subject, and the support body And a nose pad member for setting the positional relationship with respect to the eyes of the subject , and the subjective optometry unit is suspended from the support portion via a line, and the line is conscious A balance counter for offsetting the weight of the optometry unit is provided .
The subjective optometry apparatus according to claim 2 is characterized in that the filament is provided with an arcuate support arm that supports the support at both ends in the left-right direction.
The subjective optometry apparatus according to claim 3 is characterized in that a spring member is interposed between the arcuate support arm and the filament.
According to a fourth aspect of the present invention, in the subjective optometry apparatus, the arcuate support arm is provided on the support so as to be fixed and rotatable.
According to a fifth aspect of the present invention, the wearing member is a pair of ear hook members.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic diagram of a subjective optometry apparatus according to the present invention. In FIG. 1, 10 is a target presentation apparatus, 11 is a visual target, 12 is a controller, 13 is a subjective optometry unit (refractor head), 14 is a subject, 15 is an examiner, and 16 is a column as a column.
[0015]
The support column 16 is provided with an arm 17, and the arm 17 is provided with pulleys 18 to 20 as shown in an enlarged view in FIG. A wire 21 is provided in the arm 17, one end 21 a of the wire 21 is fixed to the arm 17, and the wire 21 is stretched over pulleys 18, 22, 19, and 20, The other end portion 21 b of the guide 21 is guided into the support column 16, and a balance counter 23 is attached to the other end portion 21 b of the filament 21. The pulley 22 is provided with a spring member 24.
[0016]
The subjective optometry unit 13 includes a left-eye optometry unit 13A and a right-eye optometry unit 13B. The left-eye optometry unit 13A and the right-eye optometry unit 13B have optometry windows 13A ′ and 13B ′. The left-eye optometry unit 13A and the right-eye optometry unit 13B include the Alvarez lens 25 shown in FIG. A Vcc lens 26 is coaxially disposed on the optical axis O of the optometry windows 13A ′ and 13B ′.
[0017]
The Alvarez lens 25 is composed of a pair of two transparent optical elements (for example, phase plates) 25a and 25b.
It is formed by a three-dimensional curved surface represented by X = A {(1/3) y ³ + yz ² }.
[0018]
By displacing these two optical elements 25a and 25b in the vertical direction within a plane orthogonal to the optical axis O, the refractive power obtained by optically combining the two optical elements 25a and 25b is continuously changed. Can be made.
[0019]
The Vcc lens 26 is composed of two cylindrical lenses 26a and 26b. When the cylindrical lenses 26a and 26b are rotated around the optical axis O, the cylindrical power C and the cylindrical axis angle A change.
[0020]
Inside the left-eye optometry unit 13A and the right-eye optometry unit 13B, there is provided a displacement drive mechanism 27 that relatively displaces the optical elements 25a, 25b in the vertical direction and relative displacement in the left-right direction. For example, a rack and pinion, a drive motor, and a control circuit. In FIG. 3, a displacement drive mechanism that relatively displaces the optical elements 25a and 25b in the left-right direction is not shown.
[0021]
Similarly, a rotational drive mechanism (not shown) for rotationally driving the cylindrical lenses 26a and 26b is provided. These displacement mechanisms 27 are controlled by the controller 12, and the controller 12 and the subjective optometry unit 13 are connected by electrical connection.
[0022]
The Alvarez lens 25 changes its spherical power when the optical elements 25a and 25b are relatively displaced in the vertical direction, and changes its astigmatism power when the optical elements 25a and 25b are relatively displaced in the horizontal direction. The left-eye optometry unit 13A and the right-eye optometry unit 13B are held by a holding frame member 28 as a U-shaped support.
[0023]
The holding frame member 28 has side plate portions 28A and 28B and an upper plate portion 28C. A guide groove (not shown) extending from the side plate portion 28A toward the side plate portion 28B is formed on the lower surface side of the upper plate portion 28C.
[0024]
The left-eye optometry unit 13A and the right-eye optometry unit 13B are formed with engaging portions (not shown) that engage with the guide grooves. The side plate portion 28A is provided with a movable adjustment knob member 29A for moving the left-eye optometry unit 13A along the guide groove, and the side plate portion 28B is provided for moving the right-eye optometry unit 13B along the guide groove. The left-eye optometry unit 13A and the right-eye optometry unit 13B are adjusted in their movable adjustment knob members 29A and 29B to move away from each other along the guide groove. Thus, the inter-pupil distance PD of the subject 14 is adjusted.
[0025]
An arc-shaped support arm 30 is spanned around the side plate portions 28A and 28B so as to be rotatable about the support shaft 31 of the subjective optometry unit 13. The subjective optometry unit 13 can be rotated in the front-rear direction with the support shaft 31 as a fulcrum with respect to the arc-shaped support arm 30. A coil spring 24 is locked to the top of the arc-shaped support arm 30. Here, the arc-shaped support arm 30 is configured to be rotatable with respect to the holding frame member 28, but the arc-shaped support arm 30 may be fixed to the holding frame member 28.
[0026]
Guide plates 32A and 32B are provided on the side plate portions 28A and 28B, respectively, as shown in FIGS. Ear hook members 33A and 33B are provided as wearing members so as to be slidable along the direction in which the guide plates 32A and 32B extend. The guide plates 32 </ b> A and 32 </ b> B are provided with screw holes 32 </ b> C that are screwed into the holding screws 34. The ear hooking members 33A and 33B are provided with elongated holes 33C extending in the sliding direction. The guide plates 32A and 32B are provided with an inclination angle restricting protrusion 32D, and the ear hooking members 33A and 33B are formed with engagement pieces 33D that engage with the inclination angle restricting protrusion 32D.
[0027]
When adjusting the length of the ear hooking members 33A and 33B, when adjusting the inclination angle, loosen the holding screw 34 and adjust the length in the sliding direction, and tighten the holding screw 34 at the fitted position. The length and inclination angle of the hanging members 33A and 33B are fixed.
[0028]
A mounting belt 35 is provided at the rear ends of the ear hook members 33A and 33B. As shown in FIG. 7, the mounting belt 35 can adjust the tightening force of the subject 14 on the head 14 </ b> A by a buckle mechanism 36. Further, a locking member 37 (for example, Velcro (registered trademark)) for locking the front end portion of the mounting belt 35 is also provided.
[0029]
The upper plate portion 28C is provided with a nose pad member 38 at the center in the left-right direction. The nose pad member 38 is adjusted by the adjusting mechanism 39 so as to fit the nose. As shown in FIG. 8, the adjustment mechanism 39 is generally composed of an adjustment knob member 39A, an adjustment rod 39B, an urging spring 39C, and a swing mechanism 39D. The adjustment rod 39B is provided on the upper plate portion 28C so as to obliquely penetrate the upper plate portion 28C from the upper portion toward the lower portion. A pair of brackets 39E constituting a swing mechanism is provided at the tip of the adjustment rod 39B. A rotation shaft 39F is spanned between the pair of brackets 39E, and the nose pad member 38 rotates around the rotation shaft 39F as a fulcrum. The rotary shaft 39F is movably supported.
[0030]
The adjustment knob 39A is provided at the rear end of the adjustment rod 39B. The adjustment knob 39A is provided with a screw hole 39G, and a screw is provided on the outer periphery of the adjustment rod 39B. The urging spring 39C is disposed between the lower portion of the upper plate portion 28C and the bracket 39E, and adjusts the pressing force to the nose.
[0031]
Further, a forehead pad 40 is provided on the upper plate portion 28C as shown in FIG. The forehead pad 40 is adjusted by the forehead pad adjusting mechanism 41 so as to fit the forehead 14. The adjustment mechanism 41 is generally composed of an adjustment knob member 41A, an adjustment rod 41B, an urging spring 41C, and a swing mechanism 41D. A pair of the adjustment rods 41B is provided and penetrates the upper plate portion 28C in the front-rear direction. A pair of brackets 41E constituting a swing mechanism is provided at the tip of the adjustment rod 41B. A rotation shaft 41F is spanned between the pair of brackets 41E, and the forehead pad 40 rotates about the rotation shaft 41F as a fulcrum. It is supported by the rotating shaft 41F as possible. The adjustment knob 41A is provided at the rear end of the adjustment rod 41B. The adjustment knob 41A is provided with a screw hole 41G, and the adjustment rod 41B has a screw formed on the outer periphery thereof. The urging spring 41C is interposed between the upper plate portion 28C and the bracket 41E, and adjusts the pressing force for forehead application to the forehead.
[0032]
According to this, since the weight of the subjective optometry unit 13 is suspended by being balanced by the balance counter 23, even when the subject 41 wears the subjective optometry unit 13 and swings his / her head left and right. The neck can be swung to the left and right without almost feeling the weight of the subjective optometry unit 13. Similarly, even when the head is swung up and down, the subjective optometry unit 13 can follow the swing motion of the subject 14.
[0033]
Although the embodiment has been described above, the present invention is not limited to this, and includes, for example, the following modifications.
(Modification 1)
As shown in FIG. 10, in the first modification, an arc-shaped arm member 42 that can be adjusted in the vertical direction is provided on the support column 16, and a suspension arm 43 is pivotally movable in the vertical direction at the tip of the arc-shaped arm member 42. And a configuration in which a subjective optometry unit 13 is provided at the lower end of the suspension arm 43 so as to be pivotable in the left-right direction, and a balance counter 23 that offsets the weight of the subjective optometry unit 13 is provided at the rear end of the arc-shaped arm member 42. It is what.
(Modification 2)
In the second modification, as shown in FIG. 11, a rotation shaft 43 is provided on the arm 17 of the support column 16, and a first arm 44 that rotates in the horizontal direction is provided on the rotation shaft 43. The second arm 45 is provided so as to be pivotable in the vertical direction, the third arm 46 is provided on the second arm 45 so as to be pivotable in the front-rear direction, and the horizontal pivot shaft 47 of the third arm 46 is consciously operated. The optometry unit 13 is provided, and the tip of the second arm 45 is suspended from the first arm 44 by a coil spring type wire 48. In the case of the second modification, the coil spring type wire 48 functions as the balance counter 23.
[0034]
As described above, in the embodiment of the invention, the pair of ear hook members 33A and 33B are used as the wearing members. In addition to this, the chin strap is provided in the subjective optometry unit 13, and the chin strap is hooked on the chin. It is good also as a structure.
[0035]
【The invention's effect】
Since the present invention is configured as described above, it is possible to perform subjective optometry at trial frame wearing intervals.
[0036]
In particular, an Alvarez lens is used to measure the spherical power and the astigmatic power, so that the driving mechanism for the spherical power and the astigmatic power can be reduced in weight, size, and size. Is preferred because it can reduce the rate of burden on the subject when wearing a subjective optometry unit and receiving measurements.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a subjective optometry apparatus according to the present invention.
FIG. 2 is an enlarged perspective view showing a main part of the subjective optometry apparatus according to the present invention.
FIG. 3 is an optical diagram showing an example of the internal structure of the optometry unit shown in FIG. 2;
FIG. 4 is a partial cross-sectional view showing an example of an ear hook member as a wearing member.
5 is a partial side view of the ear hooking member shown in FIG. 4. FIG.
6 is a longitudinal cross-sectional view of the ear hooking member tightening portion shown in FIG. 4. FIG.
7 is a perspective view of the subjective optometry apparatus shown in FIG. 2 as viewed from the back side. FIG.
8 is a partial cross-sectional view showing an example of an adjustment mechanism for the nose pad member shown in FIG. 2. FIG.
9 is a partial cross-sectional view showing an example of a forehead adjustment mechanism shown in FIG. 2. FIG.
FIG. 10 is a perspective view showing a modified example of the subjective optometry apparatus according to the present invention.
FIG. 11 is a perspective view showing another modified example of the subjective optometry apparatus according to the present invention.
[Explanation of symbols]
12 ... Controller 13 ... Subjective optometry unit 13A, 13B ... Optometry unit 13A ', 13B' ... Optometry window 25 ... Alvarez lens 25a, 25b ... Optical element 27 ... Drive mechanism 28 ... Support 33A, 33B ... Wearing member 38 ... Nose pad member O ... Optical axis

Claims (5)

An Alvarez lens, which is composed of a pair of optical elements and continuously changes the refractive characteristics by relatively displacing the pair of optical elements with respect to the optical axis of the optometry window, and drives the pair of optical elements. A subjective optometry unit provided with at least a driving mechanism for controlling, and a controller for controlling the subjective optometry unit,
The subjective optometry unit includes a left-eye optometry unit, a right-eye optometry unit, and a left-eye optometry unit for adjusting a distance between a pair of optometry windows according to a distance between pupils of a subject. A support body that can adjust the distance in the left-right direction with respect to the right-eye optometry unit, a wearing member that is provided on the support body and that wears the subjective optometry unit on the head of the subject, and the support body And a nose pad member for setting the positional relationship with respect to the eyes of the subject , and the subjective optometry unit is suspended from the support portion via a line, and the line is conscious A subjective optometry apparatus, comprising a balance counter for canceling the weight of the optometry unit. 2. The subjective optometry apparatus according to claim 1 , wherein the filament is provided with an arcuate support arm that supports the support at both ends in the left-right direction. The subjective optometry apparatus according to claim 2 , wherein a spring member is interposed between the arcuate support arm and the filament. The subjective optometry apparatus according to claim 3 , wherein the arcuate support arm is provided on the support so as to be fixed and rotatable. The subjective optometry apparatus according to claim 1 , wherein the wearing member is a pair of ear hook members.

Images