JP2005210702A - Near-eye display device, and system equipped with display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the inclination of a image display section at use in a near-eye display device, wherein a picture indicator can be moved between a protruding position in which the image display section can be located in front of the user's eyes and a retreated position in which the picture indicator retreats from the view. <P>SOLUTION: Even if a display arm 27 is movable, regarding rotation in a surface, wherein rotating direction is almost perpendicular to a longitudinal direction of the display arm 27, in order to prevent rotation of the display arm 27 to a housing 31, trenches 28a, 28b extended in the longitudinal direction are formed on the display arm 27, and guide rollers 34a, 34a which touch these trenches 28a, 28b are formed in the housing case 31. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a near-eye display device including an image display unit that displays an image in front of a user's eyes, and a system including the same.

  As an apparatus for displaying an image in front of the user's eyes, there is an apparatus called a near eye display or a head mounted display.

  Conventionally, as such an apparatus, for example, there is one as shown in Non-Patent Document 1 below.

  The apparatus described in Non-Patent Document 1 includes an image display unit, a round bar-shaped display arm in which the image display unit is fixed to an end, an arm support unit that slidably supports the display arm, and the arm support And a head wearing band to which the part is attached. The arm support part has a storage case for storing the display arm and a captive screw for restraining the display arm so as not to move relative to the storage case. The storage case is formed with an arm through hole into which the display arm is inserted and a screw hole extending in a direction intersecting with the arm through hole. The restraining screw is screwed into the screw hole and presses the display arm in the storage case to restrain the restraint screw from moving.

  When using this device, first attach the head mounting band to the user's head, then loosen the captive screw, pull out the display arm from the storage case, and guide the image display unit to the user's eyes. . Then, the display arm is slightly rotated around the longitudinal axis of the display arm with respect to the storage case to adjust the tilt of the image display unit, and then the captive screw is screwed into the storage case to move the display arm. And restrain it to non-rotatable.

Interactive Imaging Systems Second Sight, 1/2 page, December 9, 2004 search, Internet <URL: http://www.iisvr.com/products_mobility_Main.html>

  However, in the above prior art, the center of gravity of the image display unit is not on the axis of the display arm, so when moving the image display unit in front of the user's eyes, the display arm can rotate around the longitudinal axis Thus, there is a problem in that the image display unit may be tilted while the image display unit is moved to a predetermined position.

  The present invention has been made in view of such conventional problems, and provides a near-eye display device that is in a protruding position and can maintain a desired posture for an image display unit that can be viewed, and a system including the same. The purpose is to do.

The near-eye display device of the invention according to claim 1 for solving the above problem is
In the near eye display device having an image display unit that displays an image in front of the user's eyes,
A display arm having a rod shape, to which the image display unit is attached;
An arm support unit that movably supports the display arm between a protruding position where the image display unit can be positioned in front of the user's eyes and a retracted position retracted from the eyes;
A surface whose rotation direction is substantially perpendicular to the longitudinal direction of the display arm even when the display arm is movable in the vicinity of the protruding position including at least the protruding position between the protruding position and the retracted position. Rotation preventing means for preventing rotation of the display arm relative to the arm support,
It is characterized by having.

The near-eye display device of the invention according to claim 2 is
The near eye display device according to claim 1,
An anti-rotation shape portion formed on at least a part of the display arm, and having an outer peripheral shape of a cross section perpendicular to the longitudinal direction of the display arm, and a shape in which the distance from the center of gravity to the outer periphery of the cross section is different from each other;
The arm support portion includes a part that is not rotatable, and a contact portion that contacts the rotation prevention shape portion of the display arm at least in the vicinity of the protruding position.

The near-eye display device of the invention according to claim 3 is:
The near eye display device according to claim 1,
The rotation preventing means includes
An anti-rotation shape part formed on at least a part of the display arm, and having an outer peripheral shape of a cross-section perpendicular to the longitudinal direction of the display arm having a shape different from a circle;
The arm support portion includes a part that is not rotatable, and a contact portion that contacts the rotation prevention shape portion of the display arm at least in the vicinity of the protruding position.

The near-eye display device of the invention according to claim 4 is:
In the near eye display device according to any one of claims 2 and 3,
The outer peripheral shape of the cross section of the display arm is different in shape between the distal end side on which the image display unit is attached and the proximal end side opposite to the distal end side,
The base end side of the display arm forms the rotation prevention shape portion.

The near-eye display device of the invention according to claim 5 is:
In the near eye display device according to any one of claims 2 and 3,
The display arm has a groove extending in the longitudinal direction, and the arm support has a guide roller that contacts a surface of the display arm forming the groove,
A portion of the display arm having the groove forms the rotation prevention shape portion, and the guide roller forms the contact portion.

The near-eye display device of the invention according to claim 6 is:
In the near eye display device according to any one of claims 1 to 5,
The arm support unit includes a drive source for moving the display arm,
The drive transmission unit of the drive source is in contact with the display arm.

The near-eye display device of the invention according to claim 7 is,
The near-eye display device according to claim 6,
An urging means for urging the drive transmission portion toward the display arm is provided.

The near-eye display device of the invention according to claim 8 is,
In the near eye display device according to any one of claims 1 to 7,
The display arm has a shape curved in the longitudinal direction so as to follow the shape of the user's head,
The image display unit can be moved between the protruding position and the retracted position along a locus corresponding to the curved shape of the display arm.

The near-eye display device of the invention according to claim 9 is,
In the near eye display device according to any one of claims 1 to 7,
The arm support portion includes a storage case that stores the display arm at the retracted position.

The near-eye display system of the invention according to claim 10 for solving the above problem is
A near-eye display device according to any one of claims 1 to 9, and a head-mounted body that is mounted on the head by sandwiching the user's head by elastic force,
The near-eye display device is attached to the arm support portion and has an attachment that can be attached to and detached from a part of the head-mounted body.

The near eye display device according to another invention is:
In the near eye display device having an image display unit that displays an image in front of the user's eyes,
A display arm that is curved so as to conform to the shape of the head, and the image display unit is attached to one end;
The display arm is slid so that the display arm moves in a locus corresponding to its curved shape between a protruding position where the image display unit can be positioned in front of the user's eyes and a retracted position where the image display unit is retracted from the eyes. A support part that supports it,
It is characterized by having.

Further, the near eye display device according to still another invention is:
The near eye display device according to any one of claims 1 to 9,
When the display arm exists at the protruding position, a displayable position where the display screen of the image display unit faces the user's eye, and the display screen is at a certain angle or more with respect to the line-of-sight direction of the user's eye The image display unit is attached to the display arm so as to be swingable between a tilted non-display position,
Detecting means for detecting whether the image display unit is in the displayable position or the non-display position;
A drive source for sliding the display arm;
When the display means detects that the image display unit has reached the non-display position from the displayable position when the display arm is in the protruding position, the drive source is driven to And a control means for moving the display arm from the protruding position to the retracted position.

Further, the near eye display device according to still another invention is:
The near eye display device according to any one of claims 1 to 9,
The support portion is provided with an attachment that can be deformed and attached to and removed from the head-mounted device.

  According to the present invention, since the rotation preventing means is provided, even when the display arm is movable in the vicinity of the protruding position, the image display unit attached to the end of the display arm is inclined near the protruding position. Can be prevented.

  Hereinafter, an embodiment of a near-eye display device according to the present invention will be described.

  FIG. 1 is a perspective view of a near-eye display system including a near-eye display device 20 and headphones 10 according to the present embodiment.

  The headphone 10 includes left and right speakers 11L and 11R and an arm 12 that connects the left and right speakers 11L and 11R. Both ends of the arm 12 are curved so as to be hung on the left and right ears of the user, and form ear hooks 13L and 13R. This headphone 10 is a rear arm type headphone that turns the arm 10 to the back of the user's head.

  The near-eye display device 20 of the present embodiment includes an image display unit 21 that displays an image in front of the user's eyes, a display arm 27 that has the image display unit 21 attached to an end thereof, and a slide that can display the display arm 27. And an attachment 40 capable of attaching the arm support 30 to the headphone arm 12.

  The display arm 27 has a rod shape that is smoothly curved with a constant curvature radius R, and the center of curvature is the inside of the head H when the near-eye display device 20 is mounted on the user's head H. To come to exist. The display arm 27 has a retracted position d (FIG. 3) that fits within the arm support 30 and a protruding position c (FIGS. 1 and 2) that protrudes from the arm support 30 so that the image display unit 21 can display an image in front of the user's eyes. The image display unit 21 is supported by the arm support unit 30 so as to be movable along a locus B corresponding to the curved shape of the display arm 27. Further, when the display arm 27 exists at the protruding position c, the image display unit 21 has a displayable position a where the display screen of the image display unit 21 faces the user's eyes, and the display screen is the line of sight of the user's eyes. It is attached to the end of the display arm 27 so as to be swingable in the direction of arrow A between the non-display position b tilted by a certain angle or more with respect to the direction. The length of the display arm 27 is such that when the image display unit 21 is at the displayable position a, a distance of 20 mm or more is provided between the display screen and the user's eyes. In addition, the numerical value of 20 mm or more is a value considering that the user uses glasses. Thus, by making the display arm 27 in a curved shape and making the image display unit 21 movable so as to draw a trajectory B corresponding to this curved shape, the image display unit 21 can be safely moved without interfering with the head. Can be moved.

  FIGS. 2 and 3 are cutaway plan views of the main part of the near-eye display device of the present embodiment, and FIG. 2 shows a state in which the image display unit 21 is located at a protruding position c where an image can be displayed in front of the user's eyes. FIG. 3 shows a state in which the image display unit 21 is located at the retreat position d.

  The image display unit 21 includes a display device 22, an optical system 23 for guiding an image displayed by the display device 22 to the user's eyes, and the image display unit 21 at the displayable position or the non-display position. It has the display part position detection sensor 24 which detects whether there exists, and the display case 25 which accommodates these. The display case 25 is formed with an attachment portion 26 attached to the end of the display arm 27. The display unit position detection sensor 24 is an optical sensor and detects whether the image display unit 21 is a displayable position or a non-display position based on a change in the relative position of the display arm 27 entering the display case 25. .

  The arm support unit 30 includes a storage case 31 in which an internal space in which the display arm 27 can be stored is formed, guide rollers 34 a and 34 b that support the display arm 27 so as to be slidable, and a drive roller 35 a that slides the display arm 27. An arm drive motor 35b for rotating the drive roller 35a, a retraction detection sensor 37a for detecting whether or not the display arm 27 is in the retreat position d, and the display arm 27 is in the protrusion position c. A protrusion detection sensor 37b for detecting whether or not to perform the operation, and an arm drive switch 36 for instructing an operation of the arm drive motor 35b.

  The internal space of the storage case 31 is curved corresponding to the curved shape of the display arm 27. An arm insertion port 32 through which the display arm 27 enters and exits is formed on one end (hereinafter referred to as the front end) side of the storage case 31, and an escape portion on the other end (hereinafter referred to as the rear end) side. 33 is formed. The escape portion 33 extends in a direction away from the headphone arm 12 in order to avoid interference between the speaker 11L or 11R of the headphone 10 and the storage case 31 when the attachment 40 is coupled to the headphone arm 12. It is a part. In the vicinity of the arm insertion opening 32 of the storage case 31, a pair of guide rollers 34 a and 34 b are provided at positions along the movement path B of the display arm 27 so as to sandwich the display arm 27. The driving roller 35a is provided between the guide roller 34a on the front end side and the guide roller 34b on the rear end side, and is provided on the inner peripheral side of the curved display arm 27, in other words, on the user's head side. It has been.

  4 is a cross-sectional view taken along the line CC of FIG. 2, and FIG. 5 is a cross-sectional view taken along the line DD of FIG.

  As shown in these drawings, the outer peripheral shape of the cross section perpendicular to the longitudinal direction of the display arm 27 has portions whose distances from the center of gravity in the cross section are different from each other, in other words, are not circular. Although it is basically circular, it has a shape in which grooves 28a and 28b are formed on the inner peripheral side of the curved display arm 27 and the outer peripheral side opposite thereto. This shape portion forms an anti-rotation shape portion. Thus, the reason why the cross-sectional shape of the display arm 27 is not a circular shape is to prevent the display arm 27 from rotating about an axis extending in the longitudinal direction. Both the inner and outer grooves 28 a and 28 b of the display arm 27 extend in the longitudinal direction of the display arm 27.

  As shown in FIG. 4, each of the pair of guide rollers 34a and 34a (34b and 34b) is in contact with the grooves 28a and 28b of the display arm 27, which is the rotation prevention shape portion, and is in contact with the rotation prevention shape portion. A contact portion is formed. Each guide roller 34a (34b) is rotatably attached to a roller shaft 34c provided in the storage case 31. Further, the drive roller 35a is also in contact with the groove 28a on the inner peripheral side of the display arm 27 as shown in FIG. The drive roller 35 a is attached to a drive shaft of an arm drive motor 35 b fixed in the storage case 31. In this way, when the driving roller 35a and the arm driving motor 35b are arranged on the inner peripheral side of the display arm 27, as shown in FIG. 2, the heavy object is close to the user's head and the head moves. In addition, the amount of protrusion of the storage case 31 in the direction toward the outer peripheral side of the display arm, that is, the side away from the head can be reduced.

  FIG. 6 is a sectional view of the headphone arm 12 and the attachment 40 in a state where the attachment 40 is attached to the headphone arm 12.

  As shown in FIG. 6A, the attachment 40 is made of an elastic material such as a resin and has a C-shaped cross section. The interval d between the C-shaped openings is slightly larger than the short diameter r2 of the headphone arm 12 whose section is elliptical, but is smaller than the long diameter r1 of the headphone arm 12. For this reason, when the short axis r2 of the headphone arm 12 is set to be vertical and the arm 12 is brought close to the attachment 40 from the X direction in the drawing, the arm 12 can be easily put into the attachment 40. Thereafter, when the arm 12 is relatively rotated by 90 °, the arm 12 is completely accommodated in the attachment 40 as shown in FIG. At this time, the C-shaped opening of the attachment 40 is slightly deformed by elastic deformation and firmly holds the arm 12. As a result, the near-eye display device 20 is mechanically attached to the headphone arm 12.

  As described above, in the present embodiment, the near-eye display device 20 is attached to the headphone arm 12 by simply grasping the headphone arm 12, so that the versatility of the near-eye display device 20 can be improved. Further, in the present embodiment, since the headphone arm 12 is gripped by the elastic deformation of the attachment 40, even if the cross-sectional shape of the headphone arm 12 is slightly different, it can be dealt with. Furthermore, since the headphone 10 does not have a special mounting structure for the near-eye display device, it is possible to improve the aesthetics when the headphone is used alone.

  As shown in FIGS. 2 and 3, a displacement mechanism 50 is provided in the escape portion 33 of the storage case 31. The displacement mechanism 50 changes the relative position and orientation of the image display unit 21 with respect to the attachment 40, and includes a ball 51 provided on the attachment 40 and a ball receiving unit 52 formed on the escape portion 33 of the storage case 31. And is configured. A certain amount of frictional force acts between the ball 51 and the ball receiving portion 52. Unless a certain amount of rotational force acts on the ball receiving portion 52, Thus, the ball receiving portion 52 cannot be rotated relatively.

  In this way, by configuring the displacement mechanism 50 to include the ball 51 and the ball receiving portion 52, the arm support portion 30 and the arm support portion 30 are provided around each of the three independent axes in the three-dimensional space. The display arm 27 supported on the display arm 27 and the image display unit 21 attached to the display arm 27 can be displaced.

  The displacement mechanism 50 may be provided between the arm support unit 30 and the image display unit 21 or may be provided in the support unit 30. However, since the displacement mechanism 50 itself is heavy, it is preferable to provide a displacement mechanism between the attachment 40 and the arm support portion 30 as in the present embodiment in order to reduce the moment relative to the attachment 40 as much as possible. . In the present embodiment, the ball 50 is formed on the attachment 40 side, but it goes without saying that the ball 50 may be formed on the storage case 31 side and the ball receiving portion 52 may be formed on the attachment 40 side.

  Further, if the headphone is a dedicated product for the near-eye display device, attachment parts may be formed on the left and right speakers of the headphones, and the attachment of the near-eye display device may be attached to each of the left and right attachment parts. . This attached portion may be, for example, a male screw formed on the side opposite to the ear contact side of the speaker, and the attachment at this time is a female screw corresponding to this male screw. May be. And the above displacement mechanism 50 may be provided between such an attachment and a storage case.

  FIG. 7 is a circuit configuration diagram of the near-eye display system.

  The storage case 31 of the arm support 30 includes the driving roller 35a, the arm driving motor 35b, the retraction detecting sensor 37a, the protrusion detecting sensor 37b, the arm driving switch 36, the sensors 24, 37a, 37b, and the arm. A control system 38 that controls the arm drive motor 35b according to a signal from the drive switch 36; an image processing system 39 that sends an image signal to the display device 22 of the image display unit 21 according to a signal from the external controller C; Is provided.

  Note that an audio signal may be sent from the external controller C to the headphones 10 via a unique signal line, but an audio signal may be sent from the external controller C to the headphones 10 via the near-eye display device 20. Conversely, an image signal, a control signal, and the like are sent from the external controller C to the headphone 10 in addition to the audio signal, and among these, the image signal, the control signal, and the like are sent from the headphone 10 to the near-eye display device 20. You may make it send. As described above, when all signals are sent to one of the headphone 10 and the near-eye display device 20 and necessary signals are sent from there to the other, disconnect the two to electrically connect them. It is necessary to provide both possible electrical connections.

  Next, the operation of the near-eye display device 10 in this embodiment and the operation at that time will be described.

  First, the attachment 40 of the near-eye display device 20 is coupled to the headphone arm 12 as described above. Then, the headphone 10 combined with the near-eye display device 20 is attached to the head. At this time, the near-eye display device 20 has the image display unit 21 at the non-display position b and the display arm 27 at the retreat position d, as shown in FIG.

  Next, when the arm drive switch 36 of the near-eye display device 20 is pressed, the control system 38 detects the on / off state of the arm drive switch 36, and an arm drive control signal is output from the control system 38 to the arm drive motor 35b. The arm drive motor 35b is driven and the display arm 27 starts to protrude. When the display arm 27 reaches the projecting position c, the projecting detection sensor 37b detects this and informs the control system 38 of this, and the arm drive motor 35b is stopped by the projecting off signal from the control system 38, The display arm 27 stops at this protruding position c.

  When the display arm 27 is at the projecting position c, as shown in FIGS. 1 and 2, when the image display unit 21 is manually moved from the non-display position b to the displayable position a, this change in position is displayed on the display unit position. The detection sensor 24 detects and informs the control system 38 of that fact. When the control system 38 notifies the external controller C that the image display unit 21 has reached the displayable position, the external controller C recognizes that the near-eye display device 20 is ready to send an image signal. When the playback button of the external controller C is pressed in this state, an image signal is sent from the external controller C to the image processing system 39, and the image signal is sent from the image processing system 39 to the display device of the image display unit 21. Then, an image based on this image signal is reproduced. Initially, instead of pressing the arm drive switch 36, by pressing the playback button of the external controller C, an arm drive control signal is first sent from the external controller C to the control system 38 to perform the above series of operations. You may do it.

  When stopping the image reproduction, the image display unit 21 is manually moved from the displayable position a to the non-display position b. Then, the position change sensor 24 detects this change in position and notifies the control system 38 of the change. The control system 38 notifies the external controller C that the image display unit 21 has reached the non-display position b, and stops the transmission of the video signal from the external controller C.

  Next, when the arm drive switch 36 of the near-eye display device 20 is pressed, the control system 38 detects the on / off state of the arm drive switch 36, and an arm drive control signal is output from the control system 38 to the arm drive motor 35b. The arm drive motor 35b is driven and the display arm 27 starts to retract. When the display arm 27 reaches the retreat position d, the retraction detection sensor 37b detects this and notifies the control system 38 of this, and the arm drive motor 35b is stopped by the retreat off signal from the control system 38, and the display The arm 27 stops at the retracted position d.

  As described above, in the present embodiment, the display arm 27 and the image display unit 21 move along a trajectory that matches the curved shape of the display arm 27. Therefore, the display arm 27 and the image display unit 21 move along the user's head. It can move and the distance of these and a user's head can be suppressed to the minimum distance which does not interfere with this head. For this reason, even if a user's head moves with the movement of the image display part 21 and the display arm 27, possibility that the image display part 21 grade | etc. Will contact another thing can be decreased.

  Further, in the present embodiment, when the image display by the image display unit 21 is not performed, the display arm 27 is located at the retracted position stored in the storage case 31, so that it is the amount of attachment to the headphone arm 12 that is a head wearing band. The moment of the near-eye display device 20 with reference to can be reduced. For this reason, even if the user's head moves at the time when the image display unit 21 is retracted and the field of view of both eyes of the user is secured, the shaking of the near-eye display device 20 can be reduced. No discomfort is given to the user of the display device 20.

  Next, various modified examples related to the rotation preventing shape portion of the display arm 27 and the abutting portion that abuts thereon will be described with reference to FIGS. 8 to 10, 12, and 13 are cross-sectional views at positions corresponding to the cross section taken along the line CC in FIG. 2. Moreover, FIG. 11 is explanatory drawing which shows the difference in the processing form by the formation position of a groove | channel, when forming a groove | channel in the curved rod-shaped member.

  In the first modification, as shown in FIG. 8, the cross-sectional shape of the display arm 27a is substantially rectangular, and a groove is formed on one side surface thereof. An inner peripheral guide roller 34a is in contact with a groove 28a formed on one side of the display arm 27a, and an outer peripheral guide roller 34a is in contact with the other side of the display arm 27a. Thus, even if the cross-sectional shape of the display arm 27a is made substantially rectangular, the display arm 27a can be prevented from rotating about the axis extending in the longitudinal direction of the display arm 27a. Further, even if the groove is only on the inner peripheral side of the display arm 27a, if the guide roller 34a is inserted into the inner peripheral side groove 28a as in the present modification, the groove extends in a direction other than the longitudinal direction of the display arm 27a. Movement and rotation can be restricted.

  Note that the groove of the display arm is not formed on the inner peripheral side and / or outer peripheral side of the display arm 27, 27a, in other words, on the left and right sides in the present modification and the above-described embodiment, Even if it is formed vertically, the same effect can be basically obtained.

  However, as shown in FIG. 11, when a groove is formed on the curved rod-shaped member with the disk-shaped processing tools W1, W2, the groove G1 is formed on the inner peripheral side and / or the outer peripheral side of the curved rod-shaped member. Can be formed without changing the direction of the rotation axis of the disk-shaped processing tool W1, whereas the groove G1 can be formed on the side perpendicular to the inner and outer circumferential directions of the curved rod-shaped member. When forming the groove G2, it is necessary to sequentially change the direction of the rotating shaft of the disk-shaped processing tool W2 in accordance with the movement of the processing tool W2. For this reason, from the viewpoint of grooving, the groove is preferably formed on the inner peripheral side and / or outer peripheral side of the curved display arm.

  In the second and third modifications, as shown in FIGS. 9 and 10, the display arms 27 b and 27 c have a rectangular cross section or two rectangles stacked vertically and horizontally to form a groove. Absent. Also in these cases, the display arms 27b and 27c can be prevented from rotating around the axis extending in the longitudinal direction of the display arms 27b and 27c as in the above embodiment and the first modification. However, in the case of these modified examples, unlike the first embodiment and the first modified example, since there is no groove, movement in the direction perpendicular to the inner and outer peripheries of the display arms 27b and 27c, that is, the vertical direction is restricted. Therefore, it is necessary to provide the guide roller 34c at the vertical position.

  In the fourth and fifth modified examples, as shown in FIGS. 12 and 13, the cross-sectional shapes of the display arms 27c and 27d are formed by overlapping two circles. Specifically, the display arm 27c of the fourth modification example has a cross-sectional shape in which two circles contact each other, and the display arm 27d of the fifth modification example has two circles slightly separated from each other, It is a cross-sectional shape that connects distant parts. Each of the display arms 27c and 27d of each of these modified examples forms a groove 28 by arc portions of two circles facing each other, and the guide roller 34a is in contact with the groove 28.

  As shown in FIGS. 14 to 17, the sixth and seventh modified examples have different cross-sectional shapes at the distal end portion s to which the image display portions of the display arms 27e and 27f are attached and the base end portion b on the opposite side. In addition, the display arms 27e and 27f are supported by slide shoes 34e and 34f. The slide shoes 34e and 34f are attached to the arm insertion port 32 shown in FIG.

  As shown in FIG. 15 (a), the display arm 27e of the sixth modified example has a circular cross-sectional shape at the distal end side s, and as shown in FIG. The cross-sectional shape is elliptical. 14A shows a cross section of the display arm 27f taken along the line AA in FIG. 14 and a cross section of the slide shoe 34e. FIG. 14B shows the cross section of the display arm 27e taken along the line BB in FIG. The cross section and the cross section of the slide shoe 34e are shown.

  The inner peripheral surface shape of the slide shoe 34e through which the display arm 27e is inserted is an elliptical shape having the same shape and the same cross-sectional shape as the base end side b of the display arm 27e. For this reason, when the base end b of the display arm 27e is at the position of the slide shoe 34e, in other words, when the image display unit is in the vicinity of the protruding position, the display arm 27e has a surface perpendicular to the longitudinal direction of the display arm 27e. Both the movement in each direction and the rotation in which the rotation direction is in the vertical plane are restricted, and only the movement in the longitudinal direction is possible. On the other hand, the cross-sectional shape of the display arm 27e on the distal end side s is circular as described above, and the diameter of the circle is equal to the length of the short axis of the elliptical shape on the base end side b. When the side s is at the position of the slide shoe 34e, in other words, when the image display unit is in the vicinity of the retracted position, the movement of the display arm 27e in the direction perpendicular to the longitudinal direction is restricted. The rotation whose rotation direction is in this perpendicular plane is not constrained.

  Therefore, in this modification, when the image display unit is located in the vicinity of the protruding position, the display arm 27e cannot be rotated regardless of whether the display arm 27e is moving. Will not tilt. On the other hand, in the present modification, when the image display unit 27e is located in the vicinity of the retracted position, the display arm 27e can be rotated to make the image display unit have a good inclination. In other words, in this modification, the image display unit assumes a fixed posture at the protruding position regardless of the posture of the display arm 27e in the vicinity of the retracted position. Further, at the protruding position, the conductor from the display arm 27e is not so playful in the storage case, and when the display arm 27e rotates, the conductor may be cut off. Since the rotation of the arm 27e is prevented, cutting of the conducting wire can be prevented.

  As shown in FIG. 17 (a), the display arm 27f of the seventh modification has a circular cross-sectional shape on the distal end side s, and as shown in FIG. The cross-sectional shape forms an arc shape. 16A shows a cross section of the display arm 27f taken along line AA in FIG. 16 and a cross section of the slide shoe 34f. FIG. 16B shows the cross section of the display arm 27f taken along line BB in FIG. The cross section and the cross section of the slide shoe 34f are shown.

  The inner peripheral surface shape of the slide shoe 34f through which the display arm 27f is inserted is an arc shape having the same shape and the same shape as the cross-sectional shape on the base end side b of the display arm 27f. For this reason, when the base end b of the display arm 27f is at the position of the slide shoe 34f, in other words, when the image display unit is in the vicinity of the protruding position, the surface is perpendicular to the longitudinal direction of the display arm 27f. Both the movement in each direction and the rotation in which the rotation direction is in the vertical plane are restricted, and only the movement in the longitudinal direction is possible. On the other hand, the cross-sectional shape of the distal end s of the display arm 27f is circular as described above, and the diameter of the circle is equal to the height of the arc on the proximal end (height with reference to the string). When the distal end s of the arm 27f is at the position of the slide shoe 34f, in other words, when the image display unit is in the vicinity of the retracted position, the display arm 27f moves in each direction on a plane perpendicular to the longitudinal direction. However, the rotation whose rotation direction is in the perpendicular plane is not restricted.

  Therefore, also in this modification, the same effect as the sixth modification can be obtained.

  Next, a modification of the mounting form of the arm drive motor 35b for moving the display arm 27 will be described with reference to FIG.

  In the previous embodiment, as shown in FIG. 5, a motor fixing wall that matches the casing outer peripheral shape of the arm drive motor 35b is formed high on the inner surface of the storage case 31, and the arm drive motor 35b moves and shakes. In this modification, the motor fixing wall 35c is lowered and the arm drive motor 35b does not move, but the front end side of the arm drive motor 35b is shaken and the front end side of the arm drive motor 35b is moved to the display arm 27. It is biased by a spring 35d in the approaching direction.

  Generally, when the arm driving motor 35b is firmly fixed as in the previous embodiment, unless the fixing position or the like is determined very accurately, the driving roller 35a attached to the tip of the arm driving motor 35b and the display arm The contact pressure with 27 cannot be a predetermined contact pressure. Even if the position of the arm drive motor 35b is determined very accurately, the movement of the display arm 27 slightly changes the relative distance of the display arm 27 with respect to the drive roller 35a, so that the contact pressure changes. As described above, when the contact pressure between the display arm 27 and the driving roller 35a cannot be managed to be constant, the display arm 27 may slip with respect to the driving roller 35a. The amount may not be moved.

  Therefore, in the present modification, the front end side of the arm drive motor 35b, that is, the drive roller 35a can be moved in the perspective direction with respect to the display arm 27, while the drive roller 35a is moved closer to the display arm 27 by a spring 35d. By urging in the direction, the contact pressure between the drive roller 35a and the display arm 27 is managed so as to be the target contact pressure.

  Although the embodiment related to the near-eye display device has been described above, the display arm does not have to have a constant curvature as in the above-described embodiment, and, for example, is curved into a shape like a part of the outer periphery of an ellipse. You may do it. In the present embodiment, the movement trajectory of the image display unit 21 completely matches the curved shape of the display arm 27, but the trajectory of the image display unit is curved in a similar manner corresponding to the curved shape of the display arm. It may be.

  Moreover, although the above embodiment is directed to the rear arm type headphone 10, the present invention is not limited to this, and is applied to a head arm type head that turns an arm around the user's head. Also good. Moreover, although the above embodiment is directed to headphones including a speaker, if the head mounting device includes an arm that is mounted on the head by sandwiching the user's head from the left and right, the speaker is used. Even if it is not provided, the present invention may be applied.

It is a perspective view of the near eye display system as one embodiment concerning the present invention. It is a principal part notched top view of the near-eye display system (state of a protrusion position) as one Embodiment concerning this invention. It is a principal part notched top view of the near eye display system (state of a retracted position) as one Embodiment concerning this invention. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. It is sectional drawing of the attachment of the near eye display apparatus as one Embodiment which concerns on this invention. It is a circuit block diagram of the near eye display apparatus as one embodiment concerning the present invention. It is sectional drawing of the 1st modification of the display arm of the near eye display apparatus as one Embodiment which concerns on this invention, and its support part. It is sectional drawing of the 2nd modification of the display arm of the near eye display apparatus as one Embodiment which concerns on this invention, and its support part. It is sectional drawing of the 3rd modification of the display arm of the near-eye display apparatus as one Embodiment which concerns on this invention, and its support part. It is explanatory drawing which shows the difference in the processing form by the formation position of a groove | channel, when forming a groove | channel in the curved rod-shaped member. It is sectional drawing of the 4th modification of the display arm of the near-eye display apparatus as one Embodiment which concerns on this invention, and its support part. It is sectional drawing of the 5th modification of the display arm of the near eye display apparatus as one Embodiment which concerns on this invention, and its support part. It is a perspective view of the 6th modification of the display arm of the near eye display apparatus as one Embodiment concerning this invention, and its support part. It is sectional drawing of the 6th modification of the display arm of the near-eye display apparatus as one Embodiment which concerns on this invention, and its support part, The figure (a) is a cross section of the display arm in the AA line in FIG. FIG. 4B shows a cross section of the display arm and a cross section of the slide shoe taken along line BB in FIG. It is a perspective view of the 7th modification of the display arm of the near-eye display apparatus as one Embodiment which concerns on this invention, and its support part. It is sectional drawing of the 7th modification of the display arm of the near eye display apparatus as one Embodiment which concerns on this invention, and its support part, The figure (a) is a cross section of the display arm in the AA line in FIG. FIG. 6B shows a cross section of the display arm and a cross section of the slide shoe taken along line BB in FIG. It is sectional drawing of the modification of the display arm of the near eye display apparatus as one Embodiment which concerns on this invention, and its drive part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Headphone 11L, 11R ... Speaker 12 ... Headphone arm 20 ... Near eye display apparatus 21 ... Image display part 22 ... Display device 23 ... Optical system 24 ... Display part position detection sensor 25 ... Display cases 27, 27a, 27b, 27c, 27e, 27f ... display arm 30 ... arm support portion 31 ... storage case 33 ... relief portions 34a, 34b, 34c ... guide rollers 34e, 34f ... slide shoe 35a ... drive roller 35b ... arm drive motor 37a ... retraction detection sensor 37b ... projection Detection sensor 38 ... control system 39 ... image processing system 40 ... attachment 50 ... displacement mechanism

Claims (10)

In the near eye display device having an image display unit that displays an image in front of the user's eyes,
A display arm having a rod shape, to which the image display unit is attached;
An arm support unit that movably supports the display arm between a protruding position where the image display unit can be positioned in front of the user's eyes and a retracted position retracted from the eyes;
A surface whose rotation direction is substantially perpendicular to the longitudinal direction of the display arm even when the display arm is movable in the vicinity of the protruding position including at least the protruding position between the protruding position and the retracted position. Rotation preventing means for preventing rotation of the display arm relative to the arm support,
A near-eye display device comprising: The near eye display device according to claim 1,
The rotation preventing means includes
An anti-rotation shape portion formed on at least a part of the display arm, and having an outer peripheral shape of a cross section perpendicular to the longitudinal direction of the display arm, and a shape in which the distance from the center of gravity to the outer periphery of the cross section is different from each other;
A portion of the arm support that is not rotatable, and a contact portion that contacts the rotation preventing shape portion of the display arm at least in the vicinity of the protruding position;
A near-eye display device comprising: The near eye display device according to claim 1,
The rotation preventing means includes
An anti-rotation shape part formed on at least a part of the display arm, and having an outer peripheral shape of a cross-section perpendicular to the longitudinal direction of the display arm having a shape different from a circle;
A portion of the arm support that is not rotatable, and a contact portion that contacts the rotation preventing shape portion of the display arm at least in the vicinity of the protruding position;
A near-eye display device comprising: In the near eye display device according to any one of claims 2 and 3,
The outer peripheral shape of the cross section of the display arm is different in shape between the distal end side on which the image display unit is attached and the proximal end side opposite to the distal end side,
The base end side of the display arm forms the rotation prevention shape portion,
A near-eye display device. In the near eye display device according to any one of claims 2 and 3,
The display arm is formed with a groove extending in the longitudinal direction,
The arm support portion includes a guide roller that contacts a surface of the display arm that forms the groove.
A portion of the display arm having the groove forms the rotation prevention shape portion, and the guide roller forms the contact portion;
A near-eye display device. In the near eye display device according to any one of claims 1 to 5,
The arm support unit includes a drive source for moving the display arm,
A drive transmission portion of the drive source is in contact with the display arm;
A near-eye display device. The near-eye display device according to claim 6,
Urging means for urging the drive transmission portion toward the display arm;
A near-eye display device. In the near eye display device according to any one of claims 1 to 7,
The display arm has a shape curved in the longitudinal direction so as to follow the shape of the user's head,
The image display unit can be moved in a locus corresponding to the curved shape of the display arm between the protruding position and the retracted position.
A near-eye display device.
Display device. In the near eye display device according to any one of claims 1 to 7,
The arm support portion includes a storage case for storing the display arm in the retracted position.
A near-eye display device. The near eye display device according to any one of claims 1 to 9,
A head-mounted body that is mounted on the head by sandwiching the user's head with elastic force;
With
The near-eye display device is attached to the arm support portion and has an attachment that can be attached to and detached from a part of the head-mounted body.
A near-eye display system.

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