WO2012102328A1

WO2012102328A1 - Head mounted display

Info

Publication number: WO2012102328A1
Application number: PCT/JP2012/051630
Authority: WO
Inventors: 信郎開
Original assignee: ブラザー工業株式会社
Priority date: 2011-01-27
Filing date: 2012-01-26
Publication date: 2012-08-02
Also published as: JP5240303B2; JP2012155160A

Abstract

Provided is a head mounted display capable of setting a reflection plate aside to such a position that the field of view of a user is not hindered. In an HMD (1), a mirror holder (6) which holds a half mirror (5) in an openable and closable manner is rotatably provided along an outer circumferential surface of a lens tube (4) on a front end portion side, which emits image light. With this structure, by such a simple operation that the mirror holder (6) is rotated by 90 degrees with respect to the lens tube (4), it is possible to set the half mirror (5) aside below the field of view of an eyeball (E2) of the user. The mirror holder (6) is rotated along the outer circumferential surface of the lens tube (4) on the front end portion side, so a positional relationship between the half mirror (5) and an optical axis of an ocular optical system is not shifted. Therefore, the user can visually confirm a desirable image with the image overlapped with an actual image in the field of view at all times in using the HMD (1).

Description

Head mounted display

The present disclosure relates to a head mounted display provided with a reflector.

Conventionally, a head-mounted display that displays an image so as to be visually recognized as a large image in front of the user's eyes is known. A head-mounted display generally includes a projection unit that emits image light based on image information, and a deflecting member that reflects the image light and enters the eyes of the user. For example, the image light is emitted from an opening of the projection unit. There is a head-mounted display that employs a reflective plate (for example, a half mirror or a reflective polarizing plate) having transparency as a deflecting member. Due to the transmissive reflector, the image light and the front external light that has passed through the half mirror are simultaneously incident on the user's eyes. For example, a head mounted display is known in which an opening can be opened and closed by a half mirror that is pivotally supported (see, for example, Patent Document 1).

JP 2010-175829 A

However, in the head mounted display described in Patent Document 1, even when the half mirror is folded, a part of the half mirror remains in the central region of the user's field of view. Therefore, there is a problem that the user feels in the way.

This disclosure is intended to provide a head-mounted display that can retract the reflector to a position that does not interfere with the user's visual field.

A head mounted display according to a first aspect of the present disclosure includes a casing including a cylindrical engagement region, an image light generation unit that generates image light, and image light generated by the image light generation unit in a certain direction. An eyepiece optical system for guiding, a reflecting plate provided on one end side in the longitudinal direction of the housing, reflecting at least a part of the emitted light of the eyepiece optical system and entering the eyes of the user; and the engagement region Is mounted rotatably on the circumferential surface, and is provided in the housing, holding the reflector, the longitudinal direction of the housing is along the left-right direction of the head, And in the state where the one end side is arranged at a position closer to the user's eyes than the other end side in the longitudinal direction of the casing, the casing is attached to a frame that can be mounted on the user's head And an attachment portion.

In the head-mounted display according to the first aspect, when the reflecting plate is not used, the reflecting plate can be positioned downward by rotating the holding portion along the circumferential surface of the engaging region of the housing. . Thereby, since the user can retract the reflecting plate from the central region of the visual field, the reflecting plate does not interfere with the visual field.

In the first aspect, the housing includes a cylindrical lens barrel that houses the eyepiece optical system, and the engagement region is an outer peripheral surface of the lens barrel, on the one end side of the housing. In addition, an opening for emitting the emitted light of the eyepiece optical system toward the reflecting plate may be provided. Since the engagement area is provided on the outer peripheral surface of the lens barrel, the positional relationship between the reflection plate held by the holding portion that engages with the engagement area and the optical axis of the eyepiece optical system housed in the lens barrel is ensured. Can be retained.

Further, in the first aspect, the attachment portion may include a movement support portion that supports the casing so as to be movable in the vertical direction with respect to the frame. When the reflecting plate is not used, the holding portion is rotated along the circumferential surface of the engaging area of the housing until the reflecting plate is positioned below, and the housing is further moved downward. As a result, the user can reliably retract the reflector from the central region of the field of view.

Further, in the first aspect, the holding unit may hold the reflector so as to be openable and closable with respect to the one end of the casing. When the reflecting plate is not used, the holding portion is rotated along the circumferential surface of the engagement region of the housing until the reflecting plate is positioned at the lowest position, and the reflecting plate is moved to the one end of the housing by the holding portion. Move it in the opening direction. As a result, the user can reliably retract the reflector from the central region of the field of view.

It is a perspective view of HMD1 (at the time of use of half mirror 5) with which frame 12 was equipped. 3 is a plan view of the HMD 1 (when the half mirror 5 is used) mounted on the frame 12. FIG. FIG. 3 is a cross-sectional view taken along the line II in FIG. It is a disassembled perspective view of HMD1. It is a disassembled perspective view of HMD1 seen from the angle different from FIG. It is a left side view of HMD1 (at the time of use of half mirror 5) with which frame 12 was equipped. It is a front view of HMD1 (at the time of use of half mirror 5) with which frame 12 was equipped. It is a perspective view of HMD1 when the half mirror 5 is retracted. It is a top view of HMD1 when the half mirror 5 is retracted. It is a left view of HMD1 when the half mirror 5 is retracted. It is a front view of HMD1 when the half mirror 5 is retracted. It is a perspective view of HMD1 when the half mirror 5 is retracted to the right side.

Hereinafter, a head mounted display 1 (hereinafter referred to as an HMD 1) that is an embodiment of the present disclosure will be described with reference to the drawings. Note that the drawings referred to are used to describe technical features that can be adopted by the present disclosure. The configuration of the device described in the drawings is not intended to be limited to that, but merely an illustrative example. In the following description, the right eyeball of the user is referred to as eyeball E1, and the left eyeball is referred to as eyeball E2. The HMD 1 of this embodiment causes the left eyeball E2 to visually recognize an image. 6 and 10, the eyeball E1 is omitted for convenience of explanation.

First, an outline of the HMD 1 will be described with reference to FIGS. The HMD 1 includes a projection unit 3, a half mirror 5, a mirror holder 6, a first extending member 8, and a movement adjusting member 9. The projection unit 3 generates image light and emits it in a certain direction. In the half mirror 5, the projection unit 3 includes a cylindrical lens barrel 4 and a front end portion 32 close to the user's eyeball E2 in the axial direction of the lens barrel 4 (see FIGS. 3 to 5). The half mirror 5 is provided on the front end portion 32 side, reflects at least a part of the light emitted from the projection unit 3, and enters the eyeball E2. The mirror holder 6 has a ring-like configuration that is extrapolated to the outer peripheral surface on the front end portion 32 side and is rotatable along the circumferential direction of the lens barrel 4. The mirror holder 6 holds the half mirror 5 so that it can be opened and closed. One end of the first extending member 8 having an inverted L shape in side view is fixed to a frame 12 attached to the user's head. The other end side opposite to the one end side of the first extending member 8 extends in the up-down direction at the left front of the user's face. The movement adjusting member 9 is provided to be movable in the vertical direction along the first extending member 8. The movement adjusting member 9 holds the projection unit 3 so as to be movable in the left-right direction. The cover member 20 is provided so as to cover the rear end side of the projection unit 3. At least a part of the image light emitted from the projection unit 3 is reflected by the half mirror 5 and enters the eyeball E2. Therefore, the user can visually recognize the image superimposed on the real image in the visual field.

Next, the structure of the projection unit 3 will be described. As shown in FIGS. 3 and 4, the projection unit 3 includes a cylindrical barrel 4. The lens barrel 4 includes a circular opening 31 on the side of the front end 32 close to the eyeball E2 in the axial direction. As shown in FIG. 3, the lens barrel 4 houses a light source unit 101 that is an LCD that generates image light and an eyepiece optical system 102 that guides the image light generated by the light source unit 101 to the opening 31. . The light source unit 101 is provided on the rear end side opposite to the front end portion 32 side of the lens barrel 4. A part of the light source unit 101 protrudes rearward. The eyepiece optical system 102 includes

lenses

111, 112, and 113 in order from the opening 31 toward the light source unit 101. The image light emitted from the light source unit 101 passes through the

lenses

111, 112, and 113 and is emitted from the opening 31 of the lens barrel 4. The number of lenses constituting the eyepiece optical system 102 is not limited to three and can be changed freely.

As shown in FIG. 4, on the outer peripheral surface of the lens barrel 4 arranged substantially horizontally, a second elongated plate-like extension is provided at a height position on the upper right side when the lens barrel 4 is viewed from the opening 31 side. The member 35 is provided in parallel to the axial direction of the lens barrel 4. On the lower surface of the second extending member 35, a protruding portion 36 that protrudes downward along the center in the width direction of the second extending member 35 is provided. The protrusion 36 is fixed to the outer peripheral surface of the lens barrel 4. Therefore, a gap is formed between the lower surface on both sides in the width direction of the second extending member 35 and the outer peripheral surface of the lens barrel 4.

As shown in FIG. 4, tooth portions 37 having sawtooth irregularities are formed in the longitudinal direction of the second extending member 35 at the central portion of the upper surface of the second extending member 35 except for both sides in the longitudinal direction. An engagement groove 63 (see FIG. 5) of the movement adjusting member 9 is attached to the second extending member 35. The upper and lower end portions forming the concave shape of the engaging groove 63 enter the gap between the both sides of the second extending member 35 and the lens barrel 4 described above.

4 and 5, the front end portion 32 side of the lens barrel 4 protrudes from the front end portion 32 of the lower storage portion 28 of the cover member 20 by a predetermined length. The substantially ring-shaped mirror holder 6 is extrapolated to the outer peripheral surface on the front end portion 32 side of the lens barrel 4 protruding from the front end of the lower storage portion 28.

Next, the structure of the mirror holder 6 will be described. As shown in FIGS. 4 and 5, the mirror holder 6 includes a substantially ring-shaped main body portion 41 and a flange portion 42 that protrudes radially outward from one axial end side of the main body portion 41. A part of the mirror holder 6 is cut in parallel to the axial direction. A predetermined gap 44 is provided between a pair of cut ends facing each other. A pair of shaft support portions 47 are provided on the surface of the flange portion 42 opposite to the back surface of the main body portion 41 side. The pair of shaft support portions 47 rotatably support the half mirror 5 with the gap 44 sandwiched in the center.

The mirror holder 6 is extrapolated with respect to the outer peripheral surface of the lens barrel 4 on the front end portion 32 side. The inner diameter of the mirror holder 6 is slightly smaller than the outer diameter on the front end portion 32 side of the lens barrel 4. Therefore, when the mirror holder 6 is extrapolated to the outer peripheral surface of the lens barrel 4 on the front end portion 32 side, the mirror holder 6 is slightly pushed outward. Therefore, in a state where the mirror holder 6 is extrapolated to the outer peripheral surface on the front end portion 32 side of the lens barrel 4, the inner peripheral surface of the mirror holder 6 tightens the outer peripheral surface of the lens barrel 4. The mirror holder 6 is tightened to the extent that it can rotate in the circumferential direction along the outer peripheral surface of the lens barrel 4. Therefore, the mirror holder 6 does not fall off the lens barrel 4 during use of the HMD 1.

Next, the half mirror 5 will be described. As shown in FIGS. 1 and 4, the half mirror 5 is formed in a plate shape having a substantially rectangular shape when viewed from the front. As shown in FIG. 4, a substantially U-shaped held portion 10 to be held by the mirror holder 6 is provided at one end portion of the half mirror 5. The held portion 10 is provided with a pair of pivot support portions 11. The pair of pivoted support portions 11 are pivotally supported inside the pair of pivot support portions 47 of the mirror holder 6. Therefore, the half mirror 5 can be opened and closed with respect to the mirror holder 6.

The half mirror 5 reflects the image light emitted from the projection unit 3 and enters the pupil of the user's eyeball E2. The half mirror 5 has a predetermined reflectance (for example, 50%). The half mirror 5 transmits a part of external light from the outside and guides it to the pupil of the user's eyeball E2. That is, the half mirror 5 guides image light incident from the side of the user and external light from the outside to the pupil of the eyeball E2. Therefore, the user can visually recognize the actual field of view and the image based on the image light. The half mirror 5 may be a prism. Instead of the half mirror 5, a known mirror that does not transmit external light may be used.

Next, the shape of the first extending member 8 will be described. As shown in FIGS. 4 and 5, the first extending member 8 is formed in an inverted L shape in a side view. The first extending member 8 includes a fixed portion 51, a central portion 52, and an extending portion 53. The fixing portion 51 formed in a plate shape is fixed to the frame 12. The central portion 52 formed in a plate shape is folded and extended from one end portion of the fixed portion 51 at an obtuse angle. The extending portion 53 formed in a plate shape is folded back from the other end portion of the central portion 52 opposite to the one end portion connected to the fixing portion 51 so as to be substantially perpendicular to the fixing portion 51 and extend for a predetermined length. Is done. The fixing portion 51 is provided with a pair of screw holes 57 that penetrates in the plate thickness direction.

As shown in FIG. 4, a protrusion 55 protruding in a plate shape from the outer surface is extended at a portion along the center in the width direction of the outer surface of the extending portion 53. Of the both surfaces of the plate-like first extending member 8 in the thickness direction, the inner surface facing the inner side of the first extending member 8 bent in a substantially L shape is the inner surface, and the surface opposite to the inner surface is the outer surface. It is called. As shown in FIG. 5, tooth portions 56 having saw-like irregularities are engraved in the longitudinal direction of the extending portion 53 in a substantially central region excluding both longitudinal sides of the inner surface of the extending portion 53.

Next, the movement adjusting member 9 will be described. As shown in FIGS. 4 and 5, the movement adjusting member 9 is formed in a plate shape that curves along the arcuate outer peripheral surface of the lens barrel 4. As shown in FIG. 4, an engagement groove 60 having a substantially cross-shaped cross section is formed along the center in the width direction of the movement adjusting member 9 from the approximate center in the longitudinal direction of the outer surface toward the lower end. Note that the inwardly curved surface of the movement adjusting member 9 is referred to as an inner surface, and the opposite surface is referred to as an outer surface. The engaging groove 60 includes a vertical groove 61 formed in the plate thickness direction of the movement adjusting member 9 and a horizontal groove 62 formed in a direction orthogonal to the intermediate portion in the depth direction of the vertical groove 61.

The extending portion 53 of the first extending member 8 is inserted into the engaging groove 60. The protruding portion 55 provided on the outer surface of the extending portion 53 is inserted along the vertical groove 61. A leaf spring 66 that bends in a mountain shape is provided at the bottom of the vertical groove 61. The locking portion 67 provided at the bent portion of the leaf spring 66 is locked to any mountain of the tooth portion 56 provided on the inner surface of the extending portion 53 of the first extending member 8 shown in FIG. To do. Therefore, the movement adjusting member 9 can move along the extending portion 53 of the first extending member 8 and can be positioned within a predetermined range in the vertical direction. The movement adjusting member 9 is attached to a second extending member 35 provided in the lens barrel 4. Therefore, the projection unit 3 can be positioned within a predetermined range in the vertical direction.

As shown in FIG. 5, an engagement groove 63 having a substantially cross-shaped cross section is formed on one end side in the longitudinal direction of the inner surface of the movement adjusting member 9 in a direction orthogonal to the longitudinal direction. The engagement groove 63 includes a vertical groove 64 formed in the plate thickness direction of the movement adjusting member 9 and a horizontal groove 65 formed in a direction perpendicular to the intermediate portion of the vertical groove 64 in the depth direction.

As shown in FIG. 4, the second extending member 35 provided on the outer peripheral surface of the lens barrel 4 is inserted into the engaging groove 63. The fixing portion 36 provided on the back surface of the second extending member 35 is inserted along the longitudinal groove 64. As shown in FIG. 5, a leaf spring 68 that is bent in a mountain shape is provided at the bottom of the vertical groove 64. The locking portion 69 provided at the bent portion of the leaf spring 68 is locked to any peak of the tooth portion 37 provided on the upper surface of the second extending member 35 shown in FIG. Therefore, the movement adjusting member 9 can move along the second extending member 35 and can be positioned within a predetermined range in the left-right direction. That is, since the position of the movement adjusting member 9 in the left-right direction is positioned by the first extending member 8, the projection unit 3 can be positioned with respect to the movement adjusting member 9 within a predetermined range in the left-right direction.

Next, the structure of the cover member 20 will be described. As shown in FIGS. 1, 3, and 4, the cover member 20 is formed in a box shape having an open top. The cover member 20 includes a lower storage portion 28 and a rear end storage portion 29. The lower storage portion 28 stores the lower side of the projection unit 3 arranged substantially horizontally. The rear end side storage portion 29 formed on the cover is provided on the rear end side of the lower side storage portion 28. The rear end side storage unit 29 stores the rear end side opposite to the front end side that emits the image light of the projection unit 3. On the rear end side of the projection unit 3, mechanical parts such as a light source unit 101 described later project. The rear end side storage unit 29 protects these mechanical parts such as the light source unit 101.

Next, the structure of the frame 12 will be described. As shown in FIGS. 1 and 2, the frame 12 includes a left frame piece 14 attached to the left ear, a right frame piece 15 attached to the right ear, a front end portion of the left frame piece 14, and a right frame piece 15. The front frame piece 13 is provided between the front end of the front frame piece 13. A pair of

support portions

17 and 18 are provided at the longitudinal center of the front frame piece 13. The pair of

support portions

17 and 18 support the front frame piece 13 above both eyes of the user by contacting the left and right sides of the user's nose.

The plate-

like fixing pieces

21 and 22 for fixing the fixing portions 51 of the first extending member 8 of the HMD 1 are fixed to the left and right sides of the front frame piece 13 in the longitudinal direction. The fixing

pieces

21 and 22 are respectively provided with

protrusions

24 and 25 protruding forward of the front frame piece 13. The

protrusions

24 and 25 are provided with a pair of screw holes 27. In FIG. 1, only the screw hole 27 of the protrusion 25 is shown. In a state where the protrusion 24 and the fixing part 51 are overlapped, a screw 95 (FIG. 1) is inserted into a pair of screw holes 57 provided in the fixing part 51 and a pair of screw holes (not shown) provided in the protrusion 24. Each) is concluded. Accordingly, the first extending member 8 is fixed to the left end portion of the front frame piece 13 of the frame 12. The extending portion 53 of the first extending member 8 has a direction extending in the up-down direction diagonally to the left of the user's eyeball E2. Note that a right-eye HMD (not shown) can be fixed to the fixing piece 22.

Next, the positioning of the projection unit 3 in the vertical direction and the horizontal direction will be described. As described above, the movement adjusting member 9 is attached to the extending portion 53 of the first extending member 8 fixed to the frame 12 (see FIG. 1) so as to be movable along the longitudinal direction of the extending portion 53. ing. The movement adjusting member 9 is attached so as to be movable along a second extending member 35 provided on the outer peripheral surface of the lens barrel 4. Therefore, the projection unit 3 is movable in the vertical direction and the horizontal direction with respect to the user's head.

For example, the user moves the projection unit 3 up and down. Then, the tooth part 56 provided in the extension part 53 of the 1st extension member 8 shown in FIG. 5 pushes down the leaf | plate spring 66 provided in the engagement groove | channel 60 of the movement adjustment member 9 shown in FIG. As a result, the locking by the locking portion 67 of the leaf spring 66 with respect to the tooth portion 56 of the extending portion 53 is released. Therefore, the user can move the projection unit 3 freely in the vertical direction. When the user completes the movement of the projection unit 3 in the vertical direction, the locking portion 67 of the leaf spring 66 is provided in the extending portion 53 of the first extending member 8 at the position where the projection unit 3 is stopped. The teeth 56 are locked to any one of the peaks. In this way, the projection unit 3 can be positioned in the vertical direction.

For example, the user moves the projection unit 3 in the left-right direction. Then, the tooth part 37 provided in the 2nd extending member 35 shown in FIG. 4 pushes down the leaf | plate spring 68 provided in the engagement groove | channel 63 of the movement adjustment member 9 shown in FIG. As a result, the locking by the locking portion 69 of the leaf spring 68 with respect to the tooth portion 37 of the second extending member 35 is released. Therefore, the user can move the projection unit 3 freely in the left-right direction. When the user completes the movement of the projection unit 3 in the left-right direction, the locking portion 69 of the leaf spring 68 is located at any position of the tooth portion 37 provided on the second extending member 35 at the position where the projection unit 3 is stopped. Lock to that mountain. In this way, the projection unit 3 can be positioned in the left-right direction.

Next, the position of the half mirror 5 when the HMD 1 is used will be described. As shown in FIGS. 1, 6, and 7, the projection unit 3 is first adjusted to the height positions of the eyeballs E1 and E2. Next, as shown in FIG. 2, the projection unit 3 is moved to the center of the face. As shown in FIGS. 2, 6, and 7, the opening / closing angle of the half mirror 5 and the position of the projection unit 3 in the left-right direction so that the half mirror 5 is positioned at the center of the visual field of the user's eyeball E <b> 2. And are adjusted. As a result, at least a part of the image light emitted from the opening 31 of the lens barrel 4 is reflected by the half mirror 5 and enters the user's eyeball E2. The user can visually recognize the image superimposed on the real image in the visual field of the eyeball E2.

Next, a procedure for retracting the half mirror 5 when the HMD 1 is not used will be described. The user can retract the half mirror 5 to a position that does not interfere with the visual field while the frame 12 is mounted on the head. In this embodiment, two methods are possible.

<First evacuation method>
In the first evacuation method, the evacuation of the half mirror 5 is completed in three procedures A, B, and C. As shown in FIGS. 8, 9, 10, and 11, first, the projection unit 3 is pulled down to the lowest position (procedure A). Next, the mirror holder 6 is rotated by 90 ° with respect to the lens barrel 4 (FIG. 10: procedure B). Accordingly, as shown in FIGS. 10 and 11, the half mirror 5 is retracted to below the visual field of the user's eyeball E2. Therefore, the half mirror 5 does not interfere with the user's field of view, and a good field of view can be secured. Further, the half mirror 5 is completely retracted from the visual field of the eyeball E2 by rotating the half mirror 5 downward (FIG. 10, FIG. 11: procedure C).

Since the mirror holder 6 rotates along the outer peripheral surface of the lens barrel 4 on the front end portion 32 side, the positional relationship between the half mirror 5 and the optical axis of the eyepiece optical system 102 does not shift. Therefore, when the half mirror 5 is used next time, if the mirror holder 6 is rotated to the original position and the opening / closing angle of the half mirror 5 is returned to a predetermined angle, the user always displays a good image in the field of view. It can be visually recognized superimposed on. The half mirror 5 can be retracted to below the visual field of the user's eyeball E2 by a simple operation of simply rotating the mirror holder 6 by 90 ° with respect to the lens barrel 4. Therefore, it is possible to smoothly switch according to the use or non-use of the half mirror 5. Note that the order of procedures A, B, and C may be interchanged. In the first evacuation method, at least procedure B may be performed.

<Second evacuation method>
In the second evacuation method, the evacuation of the half mirror 5 is completed in two procedures D and E. As shown in FIG. 12, first, the projection unit 3 is moved to a position on the right side (right side when the HMD 1 is viewed from the front) (procedure D). Next, the half mirror 5 is closed with respect to the mirror holder 6 (procedure E). Even in such a method, the half mirror 5 can be retracted from the field of view of the eyeball E2.

In the above description, the lens barrel 4 shown in FIG. 4 corresponds to the “casing” of the present disclosure. The light source unit 101 illustrated in FIG. 3 corresponds to an “image light generation unit” of the present disclosure. The half mirror 5 shown in FIG. 1 corresponds to a “reflector” of the present disclosure. The mirror holder 6 illustrated in FIG. 4 corresponds to a “holding unit” of the present disclosure. The first extending member 8, the movement adjusting member 9, and the second extending member 35 illustrated in FIG. 4 correspond to an “attachment portion” of the present disclosure. The first extending member 8 and the movement adjusting member 9 correspond to the “movement support portion” of the present disclosure.

As described above, in the HMD 1 according to this embodiment, the mirror holder 6 that holds the half mirror 5 in an openable / closable manner is provided so as to be rotatable along the outer peripheral surface of the lens barrel 4 on the front end portion 32 side. . As a result, the half mirror 5 can be retracted to the lower side of the visual field of the user's eyeball E <b> 2 by a simple operation of simply rotating the half mirror 5 by 90 ° with respect to the lens barrel 4. Since the mirror holder 6 rotates along the outer peripheral surface of the lens barrel 4 on the front end portion 32 side, the positional relationship between the half mirror 5 and the optical axis of the eyepiece optical system 102 does not shift. Therefore, the user can always visually recognize a good image superimposed on the real image in the field of view when the HMD 1 is used. Moreover, in this embodiment, the projection unit 3 can move up and down, right and left, and the mirror holder 6 holds the half mirror 5 so that it can be opened and closed. Therefore, when the projection unit 3 is pulled down, the half mirror 5 can be completely retracted from the field of view of the eyeball E2 by rotating 90 ° with respect to the barrel 4 and further opening the half mirror 5 downward.

In addition, this indication is not limited to the said embodiment, Various deformation | transformation are possible. For example, the HMD 1 of the above-described embodiment is one that causes the left eyeball E2 to visually recognize an image, but the present disclosure is also applicable to one that causes the right eyeball E1 to visually recognize an image.

In the above embodiment, the mirror holder 6 is attached by being extrapolated to the outer peripheral surface of the lens barrel 4 on the front end portion 32 side. For example, a structure in which a locked portion is provided on the outer peripheral surface of the lens barrel 4 on the front end portion 32 side and a locking portion is provided on the inner peripheral surface of the mirror holder 6 may be configured to engage with each other. Thereby, the mirror holder 6 can be prevented from coming off from the lens barrel 4.

In the above embodiment, the lens barrel 4 is used as the “casing” of the present disclosure. However, the lens barrel 4 does not necessarily have a cylindrical shape as a whole, and at least a portion to which the mirror holder 6 can be attached is a cylinder. It only has to be in the shape. Further, the “housing” of the present disclosure is not limited to the lens barrel 4. For example, a member including a cylindrical engagement region for extrapolating the main body 41 of the mirror holder 6 may be provided separately from the lens barrel 4. As a specific example, a cover member extending so as to cover the entire barrel 4 may have this cylindrical engagement region. In this case, the lens barrel 4 may not be cylindrical.

1 Head mounted display (HMD)
4 Lens barrel 5 Half mirror 6 Mirror holder 8 First extending member 9 Movement adjusting member 12 Frame 31 Opening portion 35 Second extending member 101 Light source unit 102 Eyepiece optical system

Claims

A housing including a cylindrical engagement region;
An image light generator for generating image light;
An eyepiece optical system for guiding the image light generated by the image light generator in a certain direction;
A reflecting plate that is provided on one end side in the longitudinal direction of the housing and reflects at least a part of the emitted light of the eyepiece optical system and enters the user's eyes;
A holding part that is rotatably attached along a circumferential surface of the engagement region and holds the reflecting plate;
A position provided in the housing, the longitudinal direction of the housing being along the left-right direction of the head, and the one end side being closer to the user's eyes than the other end side in the longitudinal direction of the housing An attachment portion for attaching the housing to a frame that can be attached to the user's head,
A head-mounted display characterized by comprising:
The housing includes a cylindrical barrel that houses the eyepiece optical system,
The engagement region is an outer peripheral surface of the lens barrel,
The head mounted display according to claim 1, wherein an opening for emitting light emitted from the eyepiece optical system toward the reflection plate is provided on the one end side of the housing.
3. The head mounted display according to claim 1, wherein the mounting portion includes a moving support portion that supports the casing so as to be movable in the vertical direction with respect to the frame.
The head mount display according to any one of claims 1 to 3, wherein the holding unit holds the reflector so as to be openable and closable with respect to the one end of the casing.