JP2002296549A - Lens meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens meter which is capable of measuring the fitting of spectacles as well. SOLUTION: The lens meter having a nose pad supporting member 30 for holding the spectacles M by supporting nose pads 26 and 26 of the spectacles M is provided with a pointer 17 at a rod 31 provided with the nose pad supporting member 30 at the front end and is fitted with a graduation 16 at the front surface of a lower casing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens meter for measuring characteristics of a lens mounted on an eyeglass frame.

[0002]

2. Description of the Related Art Conventionally, a lens meter for measuring the lens characteristics of a lens mounted on a spectacle frame measures a spectacle receiving portion on which the spectacles are mounted and the lens characteristics of the spectacles mounted on the spectacle receiving portion. A measurement optical system.
The spectacle receiving portion has an upright pin, and the rear surface of the spectacle lens abuts on the pin to position the spectacle lens at a predetermined height position (reference position). The characteristic is measured.

[0003]

However, in such a lens meter, only the lens characteristics of the spectacle lens are measured, and the distance from the rear surface of the spectacle lens to the nose pad of the spectacle lens, the vine, and the vine are measured. The separation between,
There was a problem that fitting such as the length of the crane and the separation distance between the nose pads could not be measured, and the measurement had to be performed using another measuring instrument.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a lens meter capable of measuring fitting of glasses.

[0005]

In order to achieve the above object, an invention according to a first aspect of the present invention is directed to a spectacles receiving portion for mounting spectacles, and a lens for measuring a lens characteristic of the spectacles mounted on the spectacles receiving portion. A lens meter provided with characteristic measuring means, wherein fitting measuring means for measuring fitting of the glasses placed on the glasses receiving portion is provided.

According to a second aspect of the present invention, the spectacle receiving portion has a nose pad supporting member which supports the nose pad of the spectacles and holds the spectacles and which can move up and down. Based on the descending distance that the support member has descended from the predetermined position to the reference position where the lens characteristics are measured,
The distance from the rear surface of the lens to the nose pad is measured.

According to a third aspect of the present invention, the fitting measuring means includes a pointer which moves up and down in response to the up and down movement of the nose pad support member, and a rear surface of the lens which moves along the up and down direction of the pointer and based on the descending distance. And a scale indicating the distance from the nose pad to the nose pad.

The invention according to claim 4 is characterized in that the fitting measuring means measures a separation distance between the vines of the glasses placed on the glasses receiving portion.

The invention according to claim 5 is characterized in that the fitting measuring means is a scale for reading the position of the crane in the left-right direction.

The invention according to claim 6 is characterized in that the fitting measuring means measures a distance between nose pads.

According to a seventh aspect of the present invention, the nose pad supporting member is
A first support receiving portion having a width increasing toward the bottom and a second support receiving portion having a narrow width smaller than the first support receiving portion; The distance between the nose is measured from the height difference between the position of the glasses placed on the first support receiving portion and the position of the glasses placed on the second support receiving portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a lens meter according to the present invention will be described below with reference to the drawings. [First Embodiment] A lens meter 10 shown in FIG. 1 has a main body case 14 having a lower housing part 12 having a mounting surface 11 on an upper part and an upper housing part 13 provided above the lower housing part 12. have.

A slit 15 is formed on the front surface 12A of the lower housing portion 12 along the vertical direction.
At the position adjacent to the eyeglass lens ML along the slit 15
Scale 16 indicating the distance from the back of the camera to the nose pad of the glasses
Is attached. A pointer 17 is disposed in the slit 15, and the pointer 17 moves up and down to indicate a distance L1 (see FIG. 3) from the rear surface of the spectacle lens to the nose pad of the spectacles M.

A scale plate portion 18 is provided on a side surface 12B of the lower housing portion 12, and the scale plate portion 18 has glasses M
A scale (fitting measuring means) 19 indicating the separation distance L2 (see FIG. 2) between the crane MT and the crane MT. The value of the scale 19 indicating the position of the crane MT in the left-right direction is the separation distance L2.

Further, on the side surface 12B of the lower housing part 12,
A scale (fitting measuring means) 20 indicating the length L3 of the crane MT is provided. This scale 20 is a vine M
The curve is formed so as to follow the shape of T, and the value of the curve matching the vine MT indicates the length L3 of the vine.

Reference numeral 21 denotes a handle.
The rods 40, 40, which will be described later, move up and down by the rotation of.

The upper housing 13 has a spectacle lens M
A measurement light beam projection optical system (not shown) that projects a parallel light beam, which is a pair of measurement light beams, toward L and ML is provided.
Since the measuring light beam projection optical system has exactly the same configuration as the conventional one, the description of the configuration is omitted. Also,
An inclined display section 22 is formed in the upper part of the upper housing section 13, and this display section 22 is configured to display measured lens characteristics and the like.

The measurement light beam projected by the measurement light beam projection optical system is placed in the lower housing 12 in a spectacle lens ML, M.
A pair of measurement optical systems (not shown) for measuring the lens characteristics by receiving the light via L is provided. Since this pair of measuring optical systems has the exact same configuration as the conventional one,
The description of the configuration is omitted.

The mounting surface 11 of the lower housing 12 has
A glasses receiving section 25 on which the glasses M are placed is provided.

As shown in FIGS. 2 and 3, the spectacle receiving portion 25 has a nose pad support member 30 for supporting the nose pads 26, 26 of the spectacles M and holding the spectacles M. The nose pad support member 30 is formed in the same shape as the cross-sectional shape of the standard nose size, and has a squamous shape that becomes wider as it goes downward. A rod 31 extending downward is provided below the nose pad support member 30.

The rod 31 is vertically movably inserted into a cylindrical guide portion 32 formed on the mounting surface 11, and is urged upward by a spring (not shown). Further, a flange 33 is formed on the rod 31, and the flange 33 prevents the rod 31 from protruding upward beyond a predetermined length. That is, the nose pad support member 3
0 is located at a predetermined height position.

An arm 35 extending rearward (to the left in FIG. 4) is provided below the rod 31 as shown in FIG. It protrudes from inside to outside. The pointer 17 is provided at the tip 35a. And guideline 1
7 and the scale 16 constitute a fitting measuring means.

On the mounting surface 11, pins 37, 37 are erected on the glass 36, 36 through which the measurement light beam passes.
The pin 37 positions the spectacle lens ML at the reference position when measuring the lens characteristics of the spectacle lens ML.

A pair of rods 40, 40 that move up and down in conjunction with the rotation of the handle 21 project from the rear side of the mounting surface 11. A support member 41 is provided. A pin 42 projecting downward is provided at the tip of the support member 41.

Next, a method of using the lens meter 10 of the above embodiment will be described.

First, as shown in FIGS. 1 and 3, the nose pad support member 30 supports the nose pads 26, 26 of the glasses M and holds the glasses M. At this time, the nose pad support member 30
Is at a predetermined height position, and the pointer 17 points to zero on the scale 16. Next, the handle 21 is rotated forward, and the rods 40, 40 are lowered. By this lowering, the pins 42, 4 of each support member 41 of the rods 40, 40 are moved.
The tip of No. 2 contacts the spectacle lens ML.

Further, when the handle 21 is rotated forward, the nose pad supporting member 30 is pressed down together with the spectacle lenses ML, ML against the urging force of a spring (not shown) with the lowering of the rods 40, 40. It is being done.
By operating the handle 21, as shown in FIG. 5, the rear surfaces (lower surfaces) of the spectacle lenses ML and ML are
The nose pad support member 30 is pushed down to a position where it comes into contact with 37.

The rear surfaces of the spectacle lenses ML, ML are pins 37,
After contact with 37, a measurement switch (not shown) is operated. By operating the measurement switch, the measurement light beam from the measurement light beam projection optical system of the upper housing unit 13 is changed to the spectacle lens ML,
Projected toward the ML, the measurement optical system of the lower housing 12 receives the measurement light beam via the spectacle lenses ML, ML, and measures the lens characteristics. The lens characteristics of the spectacle lenses ML, ML obtained by this measurement are displayed on the display unit 22.

In a state where the rear surfaces of the spectacle lenses ML, ML are in contact with the pins 37, 37, the value of the scale 16 indicated by the pointer 17 is read. The value of the scale 16 is the distance L1 from the rear surface of the spectacle lens to the nose pad of the glasses M. This is because, when the nose pad support member 30 is moved by a distance from the rear surface of the spectacle lenses ML, ML to the upper ends of the pins 37, 37, the scale 16 is pre-scaled so that the pointer 17 indicates the value of the distance L1. It depends.

At this time, by reading the scales 19 and 20, it is possible to obtain the separation distance L2 between the crane MT and the crane length L3.

As described above, the glasses M
Is held, and in addition to the lens characteristics of the spectacle lenses ML and ML, the crane M which is the fitting of the spectacles M is
The distance L2 between T and the crane MT and the length L3 of the crane can be measured, and the fitting data L1, L2, L3 can be obtained. Become.

In the first embodiment, the spectacle lens M
L and ML are brought into contact with the pins 37 and 37,
The distance L2 between the nose and the vine MT and the length L3 of the vine are measured. As shown in FIG. 3, the nose pads 26, 26 of the glasses M are supported by the nose pad support member 30. In a state where the glasses M are held, the separation distance L2 between the vine MT and the vine MT and the length L3 of the vine may be measured. [Second Embodiment] FIG. 6 shows a lens meter 1 according to a second embodiment.
00 is shown. This lens meter 100
Distance L1 from rear surface of spectacle lens MT to nose pad 26
The distance L2 between the vines MT, the length L3 of the vine MT, and the distance between the nose pads 26, 26 can be automatically measured.

In FIG. 6, reference numeral 101 denotes a contact member extending in the front-rear direction and abutting on the inside of the crane MT. This contact member 101 is attached to the tip of the rod 102 as shown in FIGS. ing. The rod 102 is a cylindrical guide 103 provided on the side wall of the lower housing 12.
And is movable in the left-right direction along the guide portion 103. The rod 102 is urged by a spring (not shown) so as to protrude outward (to the right in FIG. 7). 103 is a flange for retaining.

A sliding terminal 104 is provided at the rear end of the rod 102.
Is provided, and the sliding terminal 104 is connected to the lower housing 1
2 is in contact with the sliding resistance 105 provided in the inside. The sliding resistance 105 extends in the left-right direction, and the sliding terminal 104 is moved by the movement of the rod 102 in the left-right direction.
It slides on top. This sliding resistance 10
5, a constant voltage is applied to both ends of the sliding terminal 1.
The distance L2 between the crane MT and the crane MT is determined from the voltage V1 between the crane MT and the one end of the sliding resistor 105.

The nose pad support member 130 is shown in FIGS.
As shown in FIG.
It has a nose pad support 131 and a second nose pad support 132 that is narrower than the first nose pad support 131. A sliding terminal 133 is provided below the rod 31.
As shown in FIG. 11, the sliding terminal 133 is
Is in contact with the sliding resistance 135 provided therein.

The sliding resistance 135 extends vertically.
The sliding terminal 133 slides on the sliding resistor 135 by the vertical movement of the rod 31. A constant voltage is applied to both ends of the sliding resistor 135, and the distance L from the rear surface of the spectacle lens MT to the nose pad 26 is calculated from the voltage V2 between the sliding terminal 133 and one end of the sliding resistor 135.
One is required.

As shown in FIG. 12, the distance L1 is measured by supporting the nose pads 26, 26 on the first nose pad support 131 and holding the glasses M, and the position of the sliding terminal 133 at this time is measured. As shown in FIG. 13, the sliding terminal when the pin 37 abuts on the rear surface of the spectacle lens MT while supporting the nose pads 26 and 26 on the second nose pad support 132 and holding the glasses M. The distance L4 between the nose pads 26, 26 is determined from the difference from the position 133.

FIG. 14 is a block diagram showing a configuration of a control system of the lens meter 100. In FIG. 14, 150
Is a light receiving element of a measuring optical system composed of a CCD, and 151 is an arithmetic control unit for calculating lens characteristics based on a light receiving signal of the light receiving element 150. The arithmetic control unit 151 is a CPU.
And so on. The arithmetic and control unit 151 calculates the distances L1, L2, L4 from the voltages V1, V2, etc., and calculates the distances L1, L2, L4.
2 is displayed. Reference numeral 152 denotes an operation unit provided with various operation switches.

Next, the lens meter 100 of the second embodiment
How to use will be described.

In the same manner as in the first embodiment, as shown in FIG. 11, the first nose pad support portion 131 supports the nose pads 26, 26 to hold the glasses M, and a contact member is provided inside the crane MT. 101 is brought into contact. And the handle 21
By the operation of, as shown in FIG.
The pins 37, 37 are brought into contact with the rear surfaces of L, ML. On this occasion,
The sliding terminal 133 contacts the sliding resistor 135 at the position shown in FIG. 12, and the sliding terminal 104 moves the sliding resistor 135 to the position shown in FIG.
Touch 05.

When the operation switch is operated, the measurement light beam is projected from the measurement light beam projection optical system of the upper housing 13 toward the spectacle lenses ML, ML, and the light receiving element 150 of the measurement optical system of the lower housing 12 is moved. The measurement light beam is received via the spectacle lenses ML, ML, and the arithmetic and control unit 151 calculates the lens characteristics of the spectacle lenses ML, ML based on the received light signal of the light receiving element 150 and displays the calculated lens characteristics on the display unit 32.

The arithmetic and control unit 151 is provided with the sliding terminal 1.
Voltages V1 and V2 generated at 04 and 133 are read, and distances L1 and L2 are calculated from the voltages V1 and V2 and displayed on the display unit 32.

Thereafter, as shown in FIG. 13, the nose pads 26, 26 are supported by the second nose pad support 132, and the glasses M are held.
And the operation switch is operated, the arithmetic and control unit 151 reads the voltage V2 'of the sliding terminal 133, and calculates the difference between the previous voltage V2 and the current voltage V2',
The distance L4 between the distances 26 is calculated and displayed on the display unit 32.

As described above, in addition to the measurement of the lens characteristics, the distance L1 from the rear surface of the spectacle lens MT to the nose pad 26, the separation distance L2 between the vine MT, and the length of the vine MT L3 and the distance L4 between the nose pads 26, 26 are automatically measured. That is, since each fitting of the glasses M is measured and each fitting data is obtained, it becomes very convenient when the glasses M are newly adjusted.

[0045]

As described above, according to the present invention, the fitting can be measured in addition to the lens characteristics of the spectacles.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline appearance of a lens meter according to the present invention.

FIG. 2 is an explanatory view showing glasses and a nose support member.

FIG. 3 is an explanatory diagram showing a state in which the nose pad supporting member supports the nose pad of the glasses and holds the glasses.

FIG. 4 is an explanatory diagram showing a relationship among a rod, a pointer, and a slit.

FIG. 5 is an explanatory diagram showing a state in which a pin is brought into contact with the rear surface of the spectacle lens.

FIG. 6 is an external view illustrating a lens meter according to a second embodiment.

FIG. 7 is an explanatory diagram showing a sliding resistance and a sliding terminal for measuring the width of a crane.

FIG. 8 is a perspective view showing a contact member and a rod.

FIG. 9 is an explanatory diagram showing a state in which a nose pad of glasses is supported on a first nose pad support portion.

FIG. 10 is an explanatory diagram showing a nose pad supporting member according to a second embodiment.

FIG. 11 is an explanatory view showing a state in which the nose pad of the glasses is supported by the first nose pad supporter and the glasses are held.

FIG. 12 is an explanatory diagram showing a state where a pin is brought into contact with a rear surface of the spectacle lens.

FIG. 13 is an explanatory view showing a state where the nose pad of the glasses is supported by the second nose pad supporter and the glasses are held.

FIG. 14 is a block diagram illustrating a configuration of a control system of a lens meter according to a second embodiment.

[Explanation of symbols]

 16 scale 17 pointer 26 nose pad 30 nose pad support member 31 rod M glasses

Claims (7)

[Claims] 1. A lens meter comprising: a spectacle receiving portion for placing spectacles; and a lens characteristic measuring means for measuring a lens characteristic of the spectacles placed on the spectacle receiving portion. A lens meter provided with fitting measuring means for measuring fitting of the spectacles. 2. The spectacle receiving section has a nose pad supporting member that supports the nose pad of the glasses and holds the spectacles and is movable up and down. The lens meter according to claim 1, wherein a distance from a rear surface of the lens to a nose pad is measured based on a descending distance descended from the lens to a reference position where lens characteristics are measured. 3. The fitting measuring means includes a pointer which moves up and down in response to the vertical movement of the nose pad support member, and a distance from the rear surface of the lens to the nose pad along the vertical direction of the pointer and based on the descending distance. The lens meter according to claim 2, further comprising a scale indicating a distance. 4. The lens meter according to claim 1, wherein said fitting measuring means measures a separation distance between the vines of the glasses placed on the glasses receiving portion. 5. A lens meter according to claim 4, wherein said fitting measuring means is a scale for reading a position of a crane in a left-right direction. 6. A lens meter according to claim 1, wherein said fitting measuring means measures a distance between nose pads. 7. The nose support member has a first support receiving portion having a width increasing downward and a second support receiving portion having a narrower width than the first support receiving portion. The fitting measurement means, the distance between the nose from the height difference between the position of the glasses when placed on the first support receiving portion and the position of the glasses placed on the second support receiving portion The lens meter according to claim 6, wherein the measurement is performed.