JP2004045831A - Spectacles with automatic focusing mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide spectacles with an automatic focusing mechanism the power source of which can be easily turned on/off. <P>SOLUTION: Spectacles 1 with the automatic focusing mechanism comprise: a frame part 3; an automatic focusing mechanism 4 disposed on the frame part 3 and provided with a range finding sensor 431 for measuring a distance to an object, an optical system 41 for adjusting the focus and diopter by moving to a prescribed position on the basis of a measurement result of the range finding sensor 431, and a lens driving part 42 for driving the optical system 41; and a power source part 5 disposed on the frame part 3 for supplying electricity to the automatic focusing mechanism 4 and driving the automatic focusing mechanism 4. The frame part 3 is provided with a contact sensor type switch 6 for performing the on/off operation of the power source part 5 by detecting mounting/non-mounting of the spectacles on eyes. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to spectacles with an automatic focusing mechanism having an automatic focusing mechanism for automatically performing focus adjustment and diopter adjustment.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, it has been known to use automatic focusing telescopic glasses as auxiliary glasses for low vision users. Such automatic focusing telescopes are provided with a telescope optical system, a distance measuring sensor, an objective lens driving motor, a control circuit, and the like.The distance to the object to be viewed is measured by the distance measuring sensor, and the distance is measured accordingly. The control circuit calculates the in-focus position of the objective lens, and issues an operation instruction to the objective lens drive motor. Next, when the objective lens stops moving to the designated position, the weak-sighted person wearing the glasses can view the enlarged image of the object.
By the way, in such glasses, it is necessary to supply electricity from a power supply in order to operate the above-mentioned functions. For this reason, usually, a power switch is installed on the glasses itself or in another case connected by an electric cable, and the power switch is manually turned on / off.
[0003]
[Problems to be solved by the invention]
However, for example, in the case of a power switch that is manually operated as described above when a person with low vision wears glasses, in the case of a power switch that is manually operated as described above, the position of the power switch must be searched with weak vision and turned on. Therefore, it is troublesome and inconvenient, and it has been desired to easily operate the power switch.
[0004]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide eyeglasses with an automatic focusing mechanism that can easily perform power ON / OFF operations.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 includes, for example, as shown in FIGS.
A distance measuring unit (for example, a distance measuring sensor 431) provided on the frame unit for measuring a distance to an object; and a focus adjustment by moving to a predetermined position based on a result measured by the distance measuring unit. An automatic focusing mechanism 4 having an optical system 41 for adjusting diopter and a lens driving unit 42 for driving the optical system;
The eyeglasses 1 with an automatic focusing mechanism, comprising: a power supply unit 5 provided on the frame unit to supply electricity to the automatic focusing mechanism and drive the automatic focusing mechanism;
The frame unit is provided with a contact sensor type switch 6 for performing ON / OFF operation of the power supply unit by detecting mounting / non-mounting.
[0006]
According to the first aspect of the present invention, the contact sensor type switch is provided in the frame unit to perform ON / OFF operation of the power supply unit by detecting attachment / non-attachment. When the power supply unit is turned on by detecting the user's wearing, the power supply unit supplies electricity to the automatic focusing mechanism. Thereby, the focusing unit and the diopter adjustment are performed by the distance measuring unit measuring the distance to the object, and the lens driving unit moving the optical system to a predetermined position based on the measured distance. Is That is, the user can visually recognize an enlarged image of the target object that matches his / her eyesight.
Further, when the power supply unit is turned off by the contact sensor type switch detecting that the user is not wearing the power supply unit, the power supply unit stops supplying electricity to the automatic focusing mechanism. The operation of the mechanism stops.
Therefore, the contact sensor type switch can be used by the user without manually operating the power ON / OFF operation to the glasses itself or another housing connected by an electric cable as in the related art. The power supply unit is automatically turned on / off by detecting attachment / non-attachment, so that handling becomes easy. Therefore, for example, the trouble of searching for the position of the power switch with weak visual acuity can be eliminated.
[0007]
The invention according to claim 2 is, for example, as shown in FIGS. 1 to 3, in the glasses with an automatic focusing mechanism according to claim 1,
The contact-sensor-type switch detects mounting / non-mounting by detecting a change in electrical conductivity between both ears in the modern portions 35 and 35 locked to both ears at the end of the frame portion. .
[0008]
According to the invention of claim 2, since the contact sensor type switch detects the wearing / non-wearing by sensing a change in the electrical conductivity between both ears, the contact occurs when the modern portion contacts both ears. When the sensor type switch detects the increase in conductivity between the two ears and the power supply unit is turned on, and the modern unit comes out of contact with both ears, the contact sensor type switch senses the decrease in conductivity between the two ears and supplies power. The part is turned off.
Therefore, unlike the related art, the handling becomes easy without manually operating the power switch installed on the glasses itself or another housing connected by an electric cable.
[0009]
The invention according to claim 3 is, for example, as shown in FIGS. 1 to 3, in the glasses with an automatic focusing mechanism according to claim 1,
The contact sensor type switch detects whether the nose pad portion 33 of the frame portion is mounted or not, by detecting a change in the conductivity of the nose.
[0010]
According to the third aspect of the present invention, since the contact sensor type switch detects wearing / non-wearing by sensing a change in conductivity of the nose, the contact sensor type switch contacts the nose when the nose pad portion contacts the nose. When the switch detects an increase in the conductivity of the nose and the power supply unit is turned on, and the nose pad unit comes out of contact with the nose, the contact sensor type switch detects the decrease in the conductivity of the nose and turns off the power supply unit. .
Therefore, unlike the related art, the handling becomes easy without manually operating the power switch installed on the glasses itself or another housing connected by an electric cable.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of spectacles with an automatic focusing mechanism of the present invention, and FIG. 2 is a diagram illustrating a schematic configuration of spectacles with an automatic focusing mechanism.
As shown in FIGS. 1 and 2, the glasses 1 with an automatic focusing mechanism of the present invention include lenses 2 and 2, a frame unit 3, an automatic focusing mechanism 4, a power supply unit 5, and contact sensor switches 6 and 6. ing.
[0012]
The frame portion 3 includes rims (lens frames) 31 and 31 for supporting the two lenses 2 and 2, a bridge 32 connecting the rims 31 and 31 and the lenses 2 and 2, and a nose pad portion provided on the rims 31 and 31. 33, 33, two temples 34, 34 extending from the ends of the lenses 2, 2, and modern parts 35, 35 which are locked to both ears at the ends of the temples 34, 34. .
[0013]
As shown in FIG. 2, the automatic focusing mechanism 4 includes an optical system 41, a lens drive unit 42, and a drive control unit 43, and is housed in a box-shaped case C.
The case C projects above the rim 31 that supports the lens 2 on one side, and is fixed so as to be parallel to the lens 2. A window M is formed at the center of the front surface of the case C so that light enters an objective lens 411 described later.
[0014]
The optical system 41 mainly includes an objective lens 411 and an eyepiece 412. A in FIG. 2 is an eye point, which is a position of an eye when a user views an object through the glasses 1 with an automatic focusing mechanism of the present invention.
[0015]
The objective lens 411 is supported by the lens driving unit 42 by a lens supporting unit (not shown), and is movable in the optical axis direction B when the lens driving unit 42 is driven.
When observing an image of an object at the eye point A, the eyepiece 412 is adapted to have a diopter corresponding to a user having standard visual acuity.
Then, the object image that has entered the objective lens 411 through the window M forms an image in front of the eyepiece lens 412, and the user observes the object image that has become parallel light through the eyepiece lens 412. I have.
The focal point is adjusted by driving the objective lens 411 in the optical axis direction B so that an image is formed between the objective lens 411 and the eyepiece 412 according to the distance to the object. When the objective lens 411 is driven in the optical axis direction B, the image plane moves back and forth in the optical axis direction B, and the diopter of the image observed from the eye point A via the eyepiece 412 changes.
[0016]
The lens driving unit 42 includes an objective lens driving motor 421, a gear train including gears (not shown), and a screw screw inserted into the lens supporting unit. The objective lens drive motor 421 rotates under the control of the drive control unit 43, and the rotation is transmitted to the screw via a gear train. The screw screw rotates so that the lens support moves in the optical axis direction B according to the rotation of the objective lens drive motor 421.
[0017]
The drive control section 43 includes a distance measuring sensor 431 and a control circuit 432.
The distance measurement sensor 431 measures the distance to the object to be observed, and outputs distance information to the control circuit 432.
On the other hand, the diopter adjustment includes a + button and a − button (not shown) operated by the user, and outputs a diopter adjustment signal to the control circuit 432 in response to each operation of the + button or the − button.
[0018]
When the distance information is input from the distance measurement sensor 431, the control circuit 432 calculates the appropriate position of the objective lens 411 for focusing, and instructs the lens drive unit 42 to move the objective lens 411 to that position. Outputs a motor drive signal. Then, the objective lens drive motor 421 rotates based on the motor drive signal, and the objective lens 411 moves by a predetermined direction and distance via the lens support.
On the other hand, as the diopter adjustment operation, when a diopter adjustment signal is input from the + button, the control circuit 432 outputs a motor drive signal so that the diopter of the observed image changes to the + side. When the-button for diopter adjustment is operated, the control circuit 432 outputs a motor drive signal so that the diopter changes to the-side. The objective lens drive motor 421 rotates according to these motor drive signals, and drives the objective lens 411 forward or backward via the lens support. As a result, the imaging plane moves in the optical axis direction B, and the diopter changes to the + side or the-side.
In the diopter adjustment operation, the objective lens 411 moves by a distance corresponding to the user's diopter adjustment operation.
The control circuit 432 is formed as an IC (semiconductor integrated circuit) and mounted on a substrate.
[0019]
The power supply unit 5 includes a rechargeable battery box 51 and an electric cable 52.
The electric cable 52 has one end connected to the battery box 51 and the other end connected to one temple 34 of the frame 3, whereby the battery box 51 and the contact sensor type switch 6 are automatically connected. The focus mechanism 4 is electrically connected.
[0020]
The contact sensor type switches 6, 6 are built in the modern portions 35, 35 of the frame portion 3, and detect wearing / non-wearing by detecting a change in conductivity between both ears. Perform ON / OFF operation.
That is, each ear of the user is the electrode R and the electrode L, and the contact sensor type switch 6 is turned on when the user wears the glasses 1 with the automatic focusing mechanism of the present invention (the modern units 35, 35 are both ears). On the other hand), and conversely, it turns off when the user removes the glasses 1 from the face (when the modern sections 35, 35 are out of contact with both ears). As described above, when the contact sensor type switch 6 is turned on, electricity is supplied from the battery box 51 to the automatic focusing mechanism 4 via the electric cable 52 electrically connected to the contact sensor type switch 6. When the contact sensor type switch 6 is turned off, the supply of electricity to the automatic focusing mechanism 4 is stopped.
[0021]
FIG. 3 is an example of a circuit diagram of the glasses with an automatic focusing mechanism. In FIG. 3, the variable resistance section 61 is the electric resistance value between both ears of the user, and usually shows a value of about several hundred kΩ to several MΩ. 3, points R and L correspond to the electrodes R and L in FIG. 2, respectively.
The operational amplifier 62 in this circuit compares the potentials at points X and Y in the circuit, and when the point X is higher than the point Y, passes a current through the coil 63 of the relay to turn on the switch 64. When the potential at the point X is lower than the potential at the point Y, the switch 64 remains OFF.
Therefore, when the glasses 1 with an automatic focusing mechanism are not worn, since the resistance value is infinite, the potential at the point X is lower than the potential at the point Y, and the switch 64 of the circuit remains OFF. At the time of mounting, since the resistance value changes from infinity to finite (conductivity increases), a current flows, the potential at the point X becomes higher than the potential at the point Y, and the switch 64 of the circuit switches to the ON state.
In the circuit, the battery indicates the battery box 51 of the power supply unit 5, and the conductors at both ends of the battery correspond to the electric cable 52. Reference numeral 432 denotes a control circuit of the automatic focusing mechanism 4.
[0022]
Next, the operation of the glasses 1 with an automatic focusing mechanism according to the present invention will be described with reference to FIGS.
When the glasses 1 with an automatic focusing mechanism are not worn, the resistance value between both ears is infinite, so the potential at the point X is lower than the potential at the point Y, and the contact sensor type switch 6 is turned off. . From this state, when the user wears the glasses 1 with an automatic focusing mechanism, a current flows because the resistance value changes from infinity to finite (conductivity increases), and the potential at the point X is higher than the potential at the point Y. The contact sensor type switch 6 switches to the ON state. When the contact sensor type switch 6 is turned on in this way, electricity is supplied from the battery box 61 to the automatic focusing mechanism 4 via the electric cable 52. Then, as described above, when the distance measurement sensor 431 measures the distance to the object to be observed and outputs distance information to the control circuit 432, the control circuit 432 determines an appropriate position of the objective lens 411 for focusing. Calculation is performed, and a motor drive signal is output to the lens drive unit 42 so that the objective lens 411 moves to that position. Then, based on this motor drive signal, the objective lens drive motor 421 rotates, and the objective lens 411 moves by a predetermined direction and distance. This allows the user to view the enlarged image of the object.
On the other hand, when the user removes the glasses 1, the resistance value changes from finite to infinity (conductivity decreases), so that the potential at the point X becomes lower than the potential at the point Y, and the contact sensor type switch 6 switches to the OFF state. As a result, electricity is no longer supplied from the battery box 51 to the automatic focusing mechanism 4, and the operation of the automatic focusing mechanism 4 stops.
[0023]
According to the glasses 1 with an automatic focusing mechanism according to the embodiment of the present invention, the wearing / non-wearing of the modern parts 35, 35 of the frame part 3 is detected by detecting a change in conductivity between both ears. Since the contact sensor type switch 6 is provided, when the modern parts 35 and 35 come into contact with both ears, the contact sensor type switch 6 detects an increase in conductivity of both ears, and the power supply unit 5 is turned on. . Thereby, the power supply unit 5 supplies electricity to the automatic focusing mechanism 4, and the user can visually recognize an enlarged image of the object that matches his / her eyesight. When the modern units 35, 35 are out of contact with both ears, the contact sensor type switch 6 detects a decrease in the conductivity of both ears, and the power supply unit 5 is turned off. Thus, the power supply unit 5 stops supplying electricity to the automatic focusing mechanism 4, and the operation of the automatic focusing mechanism 4 stops.
As described above, the power supply unit 5 is automatically turned ON / OFF by detecting the user's wearing / non-wearing by the contact sensor type switch 6, so that the handling becomes easy without manual operation. Therefore, for example, the trouble of searching for the position of the power switch with weak visual acuity can be eliminated.
[0024]
The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the gist of the present invention.
For example, in the above-described embodiment, the contact sensor type switch 6 detects the wearing / non-wearing by sensing a change in the electrical conductivity between both ears in the modern units 35, 35, and turns on / off the power supply unit 5. However, the change in the conductivity is not limited to between both ears. For example, the power supply unit 5 is turned on by detecting the mounting / non-wearing by detecting the change in the nose conductivity in the nose pads 33, 33. / OFF operation may be configured.
The number and shape of the objective lens 411 and the eyepiece 412 can be appropriately selected.
[0025]
【The invention's effect】
According to the first aspect of the present invention, when the contact sensor type switch detects mounting / non-mounting, the power supply unit is automatically turned on / off, and electricity is supplied to the automatic focusing mechanism, Supply is stopped. Therefore, the power ON / OFF operation can be easily performed.
[0026]
According to the second aspect of the present invention, the same effects as those of the first aspect can be obtained, and the power supply unit is turned on when the modern unit comes into contact with both ears, and the modern unit is turned on. When the two ears come out of contact, the power supply is turned off. Therefore, the power ON / OFF operation can be easily performed.
[0027]
According to the third aspect of the present invention, the same effect as that of the first aspect can be obtained, and the power supply unit is turned on when the nose pad portion comes into contact with the nose, so that the nose pad portion is turned on. Is turned off, the power supply is turned off. Therefore, the power ON / OFF operation can be easily performed.
[Brief description of the drawings]
FIG. 1 is a perspective view of eyeglasses with an automatic focusing mechanism, showing an embodiment of the present invention.
FIG. 2 is a diagram showing a schematic configuration of glasses with an automatic focusing mechanism.
FIG. 3 is a circuit diagram of the glasses with an automatic focusing mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Eyeglasses with an automatic focusing mechanism 3 Frame part 4 Automatic focusing mechanism 5 Power supply part 6 Contact sensor type switch 33 Nose pad part 35 Modern part 41 Optical system 42 Lens driving part 431 Distance measuring part

Claims (3)

A frame part,
A distance measuring unit provided on the frame unit for measuring a distance to an object, and an optical system for adjusting a focus and a diopter by moving to a predetermined position based on a result measured by the distance measuring unit And an automatic focusing mechanism having a lens driving unit for driving the optical system;
Provided in the frame portion, to supply electricity to the automatic focusing mechanism, and a power supply unit for driving the automatic focusing mechanism, glasses with an automatic focusing mechanism,
A pair of eyeglasses with an automatic focusing mechanism, wherein the frame unit is provided with a contact sensor type switch for performing ON / OFF operation of the power supply unit by detecting wearing / non-wearing. The glasses with an automatic focusing mechanism according to claim 1,
The contact sensor type switch detects attachment / non-attachment by sensing a change in conductivity between both ears in a modern portion which is locked to both ears at the end of the frame portion. Glasses with a mechanism. The glasses with an automatic focusing mechanism according to claim 1,
The eyeglasses with an automatic focusing mechanism, wherein the contact sensor type switch detects wearing / non-wearing by detecting a change in conductivity of a nose at a nose pad portion of the frame portion.

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