JPH08136858A - Binocular looking image display devices - Google Patents

Abstract

PURPOSE: To easily perform the interval adjustment and the focus adjustment of left and right image display devices and to stably hold the binocular looking image devices in accordance with the posture of an observer. CONSTITUTION: Guides 31a, 31b are integrally molded with a lower case 12 made of synthetic resin and oblong holes 37a, 37b of left and right slid bases 26a, 26b are engaged with the guides 31a, 31b. The left and right image display devices 15a, 15b are attached on the upper surfaces of the slid bases 26a, 26b via plates 25a, 25b. When a nob 42 attached pivotally to the outside of the bottom part of the lower case 12 is rotated in either the left or the right, left and right slid bases 26a, 26b engaged with pins 44a, 44b of the nob 42 are symmetrically moved in the left and the right directions to make the left and right image display devices 15a, 15b approach and separate and then the interval adjustment is performed. Moreover, the lower part of the lower case 12 is supported by a stand 46 being freely adjustable in the up-and-down direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binocular image display device in which a plurality of small optical image display devices are symmetrically arranged, and more particularly to a housing for the binocular image display device and It relates to the holding of the housing.

[0002]

2. Description of the Related Art As a conventional image display device of this type, one described in Japanese Patent Application Laid-Open No. 2-42476 (Japanese Patent Application No. 63-187929) is known. This includes a plurality of light emitting elements arranged in a predetermined manner, a lens unit forming an enlarged virtual image of the light emitting elements, a mirror capable of observing a reflected image of the enlarged virtual image therein, and a predetermined range of the mirror. And a means for selectively moving the light emitting element into a light emitting state, a timing for emitting image data by the light emitting element and a timing for repeatedly moving the mirror. By controlling and, the two-dimensional magnified virtual image is transmitted to the observer's eyes.

As an application example of the above-mentioned image display device, there is known a device which can be mounted on the observer's head as described in Japanese Patent Application Laid-Open No. 2-63379 (Japanese Patent Application No. 1-122703). There is.

[0004]

The conventional image display device of this type is small and lightweight, but is often used mainly by one eye. Here, it is conceivable to combine a plurality of image display devices and observe an image with both eyes, but since the binocular width differs for each observer, it is necessary to adjust the installation intervals of the left and right image display devices. Further, since the eyesight of each observer is different, it is necessary to adjust the focus. In order to make these adjustments, in addition to the left and right image display devices, links, rails, etc. are required, and since these are formed by separate members, the number of parts increases and the number of assembly steps also increases. Become.

Further, since a plurality of image display devices are housed in a single housing, the housing is larger and heavier than a device for observing with one eye, and a conventional method for observing while holding the housing by a hand or an observer In the method of observing the subject by wearing it on the head, the hands and neck are easily tired, and it becomes difficult to stably hold the image display device at the positions of both eyes of the observer.

Therefore, in forming the binocular image display device, the distance between the left and right image display devices can be easily adjusted and the focus can be adjusted, and the binocular image display device can be adjusted according to the posture of the observer. A technical problem to be solved in order to stabilize the holding arises, and an object of the present invention is to solve this problem.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and is an image display device used by looking into the image display portion with both eyes, which is a synthetic resin material. A housing formed of a lower case and an upper case formed by the above method, and a left image display device for displaying an image for the left eye and a right image display device for displaying an image for the right eye are arranged symmetrically inside the housing. The binocular image display device having the respective image display devices formed so as to be freely contactable and separable in the left-right direction, and the left and right image display devices are provided on the slide base that is slidable in the housing from side to side. The binocular image display device to be fixed, and long holes are opened at left and right positions on the bottom of the lower case respectively, and ribs are provided at the edge portions of the holes to project inside the lower case. A guide integrally formed with the lower case was provided so as to surround the long hole, and the left and right slide bases each had a long edge in the left-right direction, and the width of the short edge was made large enough to allow the rib to be inserted. The long hole is opened, and the long direction of the guide and the long direction of the long hole on the slide base side are aligned with each other to engage the long hole on the slide base side with the guide, and to the inside of the bottom of the lower case. A binocular image display device in which left and right slide bases are movably attached in the left and right directions, and a knob is pivotally attached to the bottom center of the lower case from the outside of the lower case, and a plurality of pins are provided on the knob. The lower case is projected to the inside of the bottom so that the lower case can rotate integrally with the knob, and the tips of the respective pins are engaged with the left and right slide bases so that when the knob is rotated, The ride base moves symmetrically in the left-right direction, and the left and right image display devices include a binocular image display device including an interval adjusting device that allows contact and separation, and the left and right image display devices, A substrate on which a plurality of light emitting elements are arranged, a lens unit that forms an enlarged virtual image of the light emitting elements, a mirror that can observe the enlarged virtual image therein, and a mirror that is repeatedly moved over a predetermined range. A binocular image display device in which a voice coil motor for controlling the left and right plates is attached to the left and right plates, and a holding portion having left and right grooves opened in the left and right plates, respectively. The mount is fixed to the mount, and the mount is slidably mounted in the groove of the holding part.Further, levers are hung vertically on the lower parts of the left and right mounts to project to the outside of the bottom of the lower case. The present invention provides a binocular vision image display device provided with a focus adjustment mechanism that can be brought into and out of contact with a lens unit, and a binocular vision image display device provided with a vertically adjustable stand under the lower case.

[0008]

According to the present invention, the plurality of image display devices are symmetrically arranged in the housing. Therefore, if the respective image display devices are set at the positions of the left and right eyes of the observer, the observer can see with both eyes. You can observe the image. Guides are integrally formed with the lower case made of synthetic resin, and the long holes of the left and right slide bases are engaged with the respective guides. When the knob pivotally attached to the bottom of the lower case is rotated, the left and right slide bases are moved symmetrically in the left and right directions along the guide, and the left and right image display devices are brought into contact with and separated from each other, and the mirrors of the image display devices are moved. Can be matched to the width of both eyes of the observer.

Further, in the image display device, the substrate is fixed to the plate, and the lens unit is slidable along the groove formed in the plate in the left-right direction. By sliding the lens unit in the left-right direction along the groove, the substrate and the lens unit come into contact with and separate from each other, and the focus of the image display device can be adjusted according to the eyesight of the observer.

Further, since a stand is provided in the lower part of the housing and the binocular image display device is supported by the stand, the observer can adjust the stand up and down in advance according to the body shape of the observer. The image can be observed in a comfortable posture.

[0011]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view showing a binocular vision image display device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view. In FIG.
The binocular image display device 11 has a left-side image display device 15a and a right-side image display device 15b which are symmetrically arranged inside a housing 14 formed of a lower case 12 and an upper case 13 which are molded of a synthetic resin material. It is provided. An image display section 1 for observation is provided at the center of the front surface of the housing 14.
6a and 16b are provided so that the images formed by the left and right image display devices 15a and 15b can be viewed by the left and right image display portions 16a and 16b with both eyes of an observer, as described later. Has been done.

Here, the left and right image display devices 15a, 15
Describing b, the LED arrays 17a and 17b as a plurality of light emitting elements are arranged in a row in a row on the substrates 18a and 18b, and the respective substrates 18a and 18b are arranged in the lens unit 19
It is fixed to one side of a, 19b. In addition to the LED array, other light emitting elements such as liquid crystal may be used as the light emitting element.

FIG. 3 is a plan view of the lower case showing the operating state of the mirror of the binocular vision image display device. As shown in FIG. 3, mirrors 20a and 20b are erected on the other side of the lens units 19a and 19b at an angle of about 45 degrees in a plan view, and the mirrors 20a and 20b are provided at the rear of the mirrors 20a and 20b.
Voice coil motors 21a and 21b are provided as means for repeatedly moving 20b over a predetermined range. Further, photo interrupters 22a and 22b are installed behind the voice coil motors 21a and 21b, respectively.
Light-shielding plates 24a and 24b are fixed to the rear ends of 3a and 23b and inserted into the slits of the photo interrupters 22a and 22b.

Thus, the left and right image display devices 15a, 15
Based on the image data to be displayed in b, the LED arrays 17a and 17a are driven by a command from a control unit (not shown).
If any LED is selectively emitted from b, the light of this LED is magnified when passing through the lens units 19a and 19b, and the magnified virtual image thereof is reflected by the mirrors 20a and 2b.
It is reflected by 0b.

Now, the voice coil motors 21a and 2a
When 1b is driven, the voice coils 23a and 23b swing horizontally in the left-right direction, and the mirrors 20a and 20b repeat in the left-right direction over a predetermined range as shown by the chain double-dashed line in FIG. Exercise. Therefore, the emission reflection images of the LED arrays 17a and 17b arranged in a line in the vertical direction are diffused right and left to form a two-dimensional surface.

Further, when the mirrors 20a and 20b repeatedly move, the light shielding plates 24a and 24b reciprocate through the slits of the photo interrupters 22a and 22b to open or block the optical paths of the photo interrupters 22a and 22b. The motion state of the mirrors 20a and 20b can be detected by the photo interrupters 22a and 22b.
Then, if the control unit controls the light emission timing of the LED arrays 17a and 17b and the timing of repetitive movement of the mirrors 20a and 20b, a two-dimensional magnified virtual image based on image data is observed in the mirrors 20a and 20b. can do.

The magnified virtual image reflected by the mirrors 20a and 20b is observed from the image display portions 16a and 16b provided on the front surface of the housing 14, and the image data for the left eye is displayed on the image display device 15a on the left side. By displaying the image data for the right eye on the image display device 15b on the right side, the observer can observe a stereoscopic image with a sense of depth.

Next, the focus adjusting mechanism of the left and right image display devices 15a and 15b will be described with reference to FIGS. FIG. 4 is a plan view of the lower case showing the operating state of the focus adjusting mechanism of the binocular vision image display device, and FIG. 5 is a partially cutaway front view of the lower case showing the operating state of the focus adjusting mechanism of the binocular image display device. .

The left and right image display devices 15a and 15b include components such as substrates 18a and 18b, lens units 19a and 19b, and mirrors 20a and 20b, and left and right plates 25.
It is attached to a, 25b, and this plate 25a, 2
5b is fixed to the upper surfaces of the slide bases 26a and 26b.

The left and right plates 25a and 25b are provided with holding portions 27a and 27b for the lens units 19a and 19b, and the holding portions 27a and 27b are provided with grooves 28 in the left-right direction.
Open a and 28b. And the lens unit 19
The mounts 29a and 29b fixed to the lower portions of a and 19b are inserted into the grooves 28a and 28b, and the upper and lower surfaces of the holding portions 27a and 27b are slidably sandwiched by the mounts 29a and 29b. Is formed so as to be slidable in the left-right direction along the grooves 28a and 28b. Further, levers 30a and 30b are vertically provided below the mounts 29a and 29b, and guides 3 to be described later are provided.
The lower ends of the levers 30a and 30b are projected to the outside of the bottom of the lower case 12 from the openings of the lower case 1a and 31b.

In this embodiment, the mirror 20 is used.
Since the a and 20b are tilted at about 45 degrees in a plan view with respect to the left and right directions of the slide bases 26a and 26b, the mirrors 20a and 20b pass through the left and right lens units 19a and 19b.
Since the light rays reflected by a and 20b are directed to the center outside the image display units 16a and 16b so as to correspond to the parallax between the eyes of the observer, the left and right plates 25a and 25b are directed toward the center of the lower case 12. It is fixed to the slide bases 26a and 26b with a slight inclination to the front side in plan view. Therefore, the grooves 28a, 2 opened in the holding portions 27a, 27b.
8b also inclines toward the center toward the center so as to be parallel to the optical axes of the respective lens units 19a and 19b, and is slightly inclined toward the front side.

When the left lever 30a is pushed in the left-right direction, the mount 29a slides along the groove 28a of the holding portion 27a as shown by the chain double-dashed line in FIGS. The lens unit 19a fixed to the upper part of the mount 29a approaches or separates from the substrate 18a, and the focus adjustment of the left image display device 15a is performed. On the other hand, when the right lever 30b is pressed in the left-right direction, the mount 29b slides along the groove 28b of the holding portion 27b, and the lens unit 19b fixed to the upper portion of the mount 29b approaches or separates from the substrate 18b. Then, the focus adjustment of the image display device 15b on the right side is performed.

6 to 8 are views showing a gap adjusting mechanism of the binocular vision image display device. FIG. 6 is a plan view of a lower case showing the gap adjusting mechanism, and FIG. 7 is a bottom view of the lower case showing the gap adjusting mechanism. FIG. 8 is a partially cutaway front view of the lower case showing the space adjusting mechanism.

Guides 31a and 31b are provided on the bottom of the lower case 12 at symmetrical positions on a straight line in the left-right direction, and square holes 31c and 31d are opened on the bottom surface of the lower case 12, and ribs 31e are formed at the edges of the holes. , 31f are provided so as to project inside the lower case 12, and the ribs 31e, 3f
Left and right guides 31a and 31b are integrally formed with the lower case 12 so as to surround the rectangular holes 31c and 31d at 1f.

As described above, the left and right guides 31
The levers 30a and 30b of the focus adjusting mechanism are loosely inserted in the square holes 31c and 31d of the a and 31b. Further, inside the bottom of the lower case 12, two protrusions 32a, 32b and 33a, 33b are provided in the left-right direction.

Further, a round hole 3 is provided at the center of the bottom of the lower case 12.
4 is opened, and arc-shaped guide holes 35a and 35b are opened facing each other on the circumference centered on the round hole 34. A screw hole 36 for mounting a stand, which will be described later, is provided at the rear position of the guide hole 35b.

Here, the left and right slide bases 26
a and 26b each have a long hole 37a in the left-right direction at a substantially central portion thereof,
37b is opened and the slide base 26a,
Long holes 38a, 38b and 39a, 39b are opened in the left and right direction on the rear side of 26b. The left and right width dimensions of the long holes 37a and 37b are sufficiently longer than the left and right dimensions of the guides 31a and 31b, and the front and rear width dimensions of the long holes 37a and 37b are the same as the front and rear dimensions of the guides 31a and 31b. The lengths are substantially the same, and the guides 31a and 31b can be inserted. In addition, each slide base 26a,
In the vicinity of the central portion of the lower case 12, 26b is provided with projecting portions 40a, 40b extending horizontally inward at symmetrical positions about the round hole 34.
The long holes 41a and 41b are opened in the front-back direction at 0b.

Thus, the left and right image display devices 15a, 15
When mounting the slide bases 26a, 26b on which the b is mounted in the lower case 12, the longitudinal direction of the guides 31a, 31b of the lower case 12 and the slide bases 26a, 2b.
The long holes 37a and 37b of 6b are aligned with the longitudinal direction, and the left and right guides 31a and 31b are engaged with the long holes 37a and 37b. At the same time, the protrusion 32 of the lower case 12
Slide base 2 to a, 32b and 33a, 33b respectively
6a, 26b elongated holes 38a, 38b and 39a, 39b
And the left and right slide bases 26a and 26b are mounted inside the bottom portion of the lower case 12.

Further, the shaft 43 of the knob 42 is inserted into the round hole 34 from the outside of the bottom of the lower case 12, and the pins 44a and 44b projecting on both sides of the shaft 43 are fitted to the lower case 12.
Of the slide bases 26a, 26b while inserting the pins 44a, 44b into the guide holes 35a, 35b of the slide bases 26a, 26b.
Engage with the long holes 41a and 41b. Then, a retaining ring (or nut) 45 is fixed to the tip of the shaft 43 from the inside of the bottom of the lower case 12.

9 and 10 are plan views of the essential parts of the slide base showing the operating state of the gap adjusting mechanism of the binocular vision image display device. The operating state of the gap adjusting mechanism will be described below with reference to FIGS. 6, 9 and 10.

When the knob 42 is rotated counterclockwise in plan view from the state shown in FIG. 6, the pins 44a of the knob 42,
The shaft 44b rotates counterclockwise in the guide holes 35a and 35b about the shaft 43. Therefore, the hole wall of the elongated hole 41a is pressed to the right by one pin 44a, and the hole wall of the elongated hole 41b is pressed to the left by the other pin 44b, and as shown in FIG. The slide base 26a moves to the right, and the right slide base 26b moves to the left.

At this time, the front and rear ribs 31e, 31f of the guides 31a, 31b provided on the lower case 12 are rubbed by the hole edge portions 37c, 37d of the long holes 37a, 37b, and the protrusions 32a, 32b, 33a. , 33b with long holes 3
8a, 38b and 39a, 39b rub against each other to serve as lateral guides for the slide bases 26a, 26b, and prevent the slide bases 26a, 26b from shifting back and forth during movement.

Thus, the left and right slide bases 26a,
26b approach each other, and as shown by the chain double-dashed line in FIG.
Left and right image display devices 15a, 15 attached to a, 26b
b symmetrically approaches the central portion of the lower case 12 at equal distances.

On the other hand, when the knob 42 is rotated clockwise in a plan view from the state shown in FIG. 6, the pins 44a and 44b of the knob 42 are guided around the shaft 43 by the guide holes 35a and 35a.
The inside of 35b is rotated clockwise. Therefore, one pin 4
The hole wall of the long hole 41a is pressed to the left by 4a,
The hole wall of the elongated hole 41b is pressed to the right by the other pin 44b, and as shown in FIG. 10, the left slide base 26a moves to the left and the right slide base 26b moves.
Moves to the right.

Thus, contrary to the above, the left and right slide bases 26a and 26b are separated from each other, and the plates 25a and 25b are separated.
The left and right image display devices 15a and 15b mounted on the left and right slide bases 26a and 26b are symmetrically separated from the central portion of the lower case 12 by equal distances.

Therefore, the left and right image display devices 15a and 15b can be symmetrically moved toward and away from each other by rotating the knob 42, and the left and right mirrors 20a and 20b can be fitted to the size of both eyes of the observer. The left and right image display devices 15
It is possible to adjust the distance between a and 15b extremely easily and quickly. At this time, the left and right lens units 19
Since a and 19b move integrally with the slide bases 26a and 26b, the substrates 18a and 18b and the lens unit 19 are
The distances to a and 19b do not change, and the distance adjustment does not cause the left and right image display devices 15a and 15b to be out of focus.

Next, the stand 46 will be described. As shown in FIGS. 1 and 2, the stand 46 includes a main rod 48 erected on a base 47, a sub rod 49 attached to the bottom of the lower case 12, a main rod 48, and a sub rod 4.
9 and a joint 50 for connecting the auxiliary rod 4
A screw 51 portion is provided at the tip of 9. The screw portion 51 is screwed into the screw hole 36 at the bottom of the lower case 12 described above.

Thus, the housing 14 is supported by the stand 46, and the observer does not have to hold the housing 14 by hand or mount the housing 14 on the observer's head, and the binocular image can be obtained. The display device 11 is set at an appropriate place such as a desk, and the left and right image display units 16a,
Images can be viewed from 16b.

Here, if the joint 50 is loosened by rotating the handle 52, the joint 50 will move to the main rod 48.
It is possible to move up and down and rotate left and right along with, and the auxiliary rod 49 can also move up and down and rotate back and forth.
After that, if the joint 50 is tightened again with the handle 52, the main rod 48 and the auxiliary rod 49 are fixed, and the supporting height of the housing 14 and the inclination of the front and rear can be arbitrarily set.

Therefore, by adjusting the stand 46 according to the body shape of the observer, the observer can stably observe the image of the binocular vision image display device 11 in a comfortable posture. .

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modified ones.

[0042]

As described in detail in the above one embodiment, the present invention observes the image display device provided symmetrically with both eyes, and therefore, the observation is performed in comparison with the conventional device for observing with one eye. The eyestrain of the person is reduced, and the power of the image is significantly improved. It is also possible to observe a stereoscopic image with a sense of depth.

The slide base can be symmetrically moved in the left-right direction by equal distances by the distance adjusting mechanism, and the positions of the mirrors of the left and right image display devices can be extremely easily matched with the binocular width of the observer. Also, since the guide of the lower case that guides the slide base is integrally molded with the lower case using a synthetic resin material, there is no need to form links or rails as separate members, reducing the number of parts and assembling man-hours. Can be shortened to contribute to cost reduction.

On the other hand, the substrate and the lens unit can be brought into and out of contact with each other by the focus adjusting mechanism including the substrate fixed on the plate and the lens unit slidable on the plate in the left-right direction. Further, since the sliding direction of the lens unit is regulated by the groove in the optical axis direction of the lens unit, the focus of the image display device can be adjusted very easily according to the visual acuity of the observer.

Further, since the housing is supported by the stand, the observer can observe the image without directly holding the image display device. Further, the stand can be easily and quickly adjusted up and down, and the height of the binocular vision image display device can be held in an optimum observation posture according to the body shape of the observer,
This is an invention that has various kinds of effects, such that an observer can view an image in a stable posture.

[Brief description of drawings]

FIG. 1 is a front view of a binocular vision image display device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a binocular vision image display device.

FIG. 3 is a plan view of a lower case showing an operating state of a mirror.

FIG. 4 is a plan view of a lower case showing an operating state of a focus adjusting mechanism.

FIG. 5 is a partially cutaway front view of a lower case showing an operating state of a focus adjusting mechanism.

FIG. 6 is a plan view of a lower case showing a space adjusting mechanism.

FIG. 7 is a bottom view of the lower case showing the space adjusting mechanism.

FIG. 8 is a partially cutaway front view of the lower case showing an operating state of the space adjusting mechanism.

FIG. 9 is a plan view of a main part of a slide base, showing an operating state of a space adjusting mechanism.

FIG. 10 is a plan view of a main part of a slide base, showing an operating state of a space adjusting mechanism.

[Explanation of symbols]

 11 Binocular Image Display Device 12 Lower Case 13 Upper Case 14 Housing 15a, 15b Image Display Device 16a, 16b Image Display Unit 17a, 17b LED Array 18a, 18b Substrate 19a, 19b Lens Unit 20a, 20b Mirror 21a, 21b Voice Coil Motor 25a, 25b Plate 26a, 26b Slide base 27a, 27b Holding part 28a, 28b Groove 29a, 29b Mount 30a, 30b Lever 31a, 31b Guide 31c, 31d Square hole 31e, 31f Rib 37a, 37b Long hole 37c, 37d Hole edge part 42 Knobs 44a, 44b Pins 46 Stand

Claims (7)

[Claims] 1. An image display device used by looking into an image display unit with both eyes, comprising a housing made of a synthetic resin material and comprising a lower case and an upper case, wherein the housing for the left eye is provided. The image display device on the left side that displays the image of the image and the image display device on the right side that displays the image for the right eye are arranged symmetrically, and the respective image display devices are formed so that they can be contacted and separated in the horizontal direction. Binocular vision image display device. 2. The binocular vision image display device according to claim 1, wherein the left and right image display devices are fixed to slide bases that are slidable left and right in the housing. 3. An elongated hole is formed at each of left and right positions of a bottom portion of the lower case, and ribs are provided at edge portions of the hole so as to project to the inside of the lower case, and the elongated case is integrated with the lower case so as to surround the elongated hole. In addition to providing the molded guide, the left and right slide bases are provided with long edges in the left and right directions, respectively, and open the long holes with the width dimension of the short edges being the size into which the rib can be inserted. Align the longitudinal direction of the guide with the longitudinal direction of the long hole on the slide base side, engage the long hole on the slide base side with the guide, and move the left and right slide bases left and right inside the bottom of the lower case. The binocular vision image display device according to claim 2, attached to the. 4. A knob is pivotally attached from the outside of the lower case to the center of the bottom of the lower case, a plurality of pins are provided on the knob, and each of the pins is projected to the inside of the bottom of the lower case so that the knob can rotate integrally with the knob. In addition, the tips of the respective pins are engaged with the left and right slide bases, and when the knobs are rotated, the left and right slide bases move symmetrically in the left and right directions, and the left and right image display devices are The binocular vision image display device according to claim 2, further comprising a space adjusting device that can be brought into contact with and separated from the space. 5. The left and right image display devices include a substrate on which a plurality of light emitting elements are arranged, a lens unit that forms a magnified virtual image of the light emitting elements, a mirror that can observe the magnified virtual image therein, The binocular vision image display device according to claim 1, wherein voice coil motors for repeatedly moving the mirror over a predetermined range are attached to the left and right plates. 6. The left and right plates are each provided with a holding portion having a groove opened in the left and right direction, and a mount is fixed to the lower portion of the left and right lens units and the mount is slidable in the groove of the holding portion. 7. The focus adjusting mechanism according to claim 5, further comprising a focus adjusting mechanism which is attached to the left and right mounts, and further has a lever provided vertically at a lower portion of the left and right mounts to project to the outside of the bottom of the lower case to allow the left and right substrates and the lens unit to come into contact with and separate from each other. Binocular image display device. 7. The binocular vision image display device according to claim 1, wherein a vertically adjustable stand is provided at a lower portion of the lower case.