WO2015030100A1

WO2015030100A1 - Image display device, and head-mounted display

Info

Publication number: WO2015030100A1
Application number: PCT/JP2014/072544
Authority: WO
Inventors: 美佑紀楠田; 信郎開
Original assignee: ブラザー工業株式会社
Priority date: 2013-08-30
Filing date: 2014-08-28
Publication date: 2015-03-05

Abstract

The purpose of the present invention is to provide: an image display device which is capable of focus adjustment, and with which an increase in the size of a housing thereof in a vertical direction is reduced; and a head-mounted display (HMD). This HMD is provided with: an image unit (7) capable of generating image light; a lens unit (6) provided with a plurality of lenses; a housing (13, 14) which covers the image unit (7) and the lens unit (6); a half mirror (56) capable of deflecting rearward the image light generated by the image unit (7); a protrusion (65) provided to a rear side of the lens unit (6); a protrusion (64) provided to a front side of the lens unit (6); a groove (242) which is provided to an inside surface of a rear side of the housing, extends in a straight line from left to right, and supports the lens unit (6) such that the lens unit (6) is capable of moving in a left-right direction; an adjustment mechanism (4) provided with a cam groove which engages with the protrusion (64); and an operation member (3) which is connected to the adjustment mechanism (4) and provided to a front side of the housing, and which is capable of being operated by a user.

Description

Image display device and head mounted display

The present disclosure relates to an image display device and a head-mounted display using the image display device.

Conventionally, an image display device capable of performing focus adjustment is known. The image display device is, for example, a head mounted display (hereinafter referred to as “HMD”). For example, a monocular HMD that presents an image to one eye of a user is known. In a known HMD, the optical axis of image light (hereinafter referred to as “image light”) displayed on the liquid crystal in the casing is in the same direction as the longitudinal direction of the casing (hereinafter referred to as “left-right direction”). Extend. The image light is bent backward by the half mirror and is incident on one eye of the user. The HMD includes an adjuster for performing focus adjustment. The adjuster is ring-shaped and can be rotated with the optical axis as a fulcrum. A liquid crystal holder for holding the liquid crystal is disposed inside the adjuster. The engaging portion that protrudes inward from the inner peripheral surface of the adjuster is fitted into a groove cam provided on the outer peripheral surface of the liquid crystal holder. In accordance with the rotation of the adjuster, the liquid crystal holder moves in the left-right direction along the optical axis. In this case, the position of the liquid crystal holder with respect to the lens holder fixed to the housing moves in the left-right direction.

JP 2013-44828 A

In the case of the above HMD, the adjuster is provided outside the liquid crystal holder. For this reason, the magnitude | size of the circumferential direction centering on the optical axis in a housing | casing becomes large compared with the case where an adjuster is not provided. When the circumferential size of the housing is large, the housing is also large in the vertical direction. As a result, there is a problem that the visual field of the user may be blocked by the housing.

An object of the present invention is to provide an image display device and a head mounted display capable of adjusting the focus while reducing an increase in the vertical size of the casing.

One aspect of the present disclosure is:
An image unit capable of generating image light;
A lens unit having a plurality of lenses, disposed on one side in the first direction with respect to the image unit, and having an optical axis extending in the first direction;
A housing covering at least a part of the image unit and the lens unit;
Of the housing, a member provided on the one side in the first direction with respect to the lens unit, wherein the image light guided by the lens unit is secondly orthogonal to the first direction. A deflecting member capable of deflecting to one side of the direction;
A first engagement member provided on the one side in the second direction of at least one of the image unit and the lens unit;
A second engagement member provided on the other side in the second direction of at least one of the image unit and the lens unit;
Of the casing, a member provided on the inner side surface of the one side portion in the second direction, which is engaged with the first engaging member and supported so as to be movable in the first direction. A third engaging member that
A second engagement member that engages with the second engagement member, the fourth engagement member being capable of changing a relative distance between the image unit and the lens unit in the first direction; An adjustment mechanism provided on the other side of the second direction of
It is an image display device provided with an operation member that is provided at least on the other side in the second direction in the casing and that allows a user to operate the adjustment mechanism.

In the image display device, at least one first engagement member of the image unit and the lens unit is provided on one side in the second direction, and the second engagement member is provided on the other side in the second direction. The first engagement member engages with the third engagement member of the housing and is supported so as to be movable in the first direction with respect to the housing. The second engagement member engages with the fourth engagement member of the adjustment mechanism, and moves in the first direction in response to an operation on the operation member. As a result, the relative distance in the direction along the optical axis between the image unit and the lens unit changes, and focus adjustment is performed.

As an example, a case where the image display device is attached to the user in a state where the first direction of the housing faces the left-right direction and one side of the second direction faces the user will be described. In this case, the first engagement member, the second engagement member, the third engagement member, and the fourth engagement, which are members for adjusting the focus by changing the relative distance between the image unit and the lens unit. A member is arrange | positioned with respect to a user in the front-back direction (2nd direction), and is not arrange | positioned in an up-down direction (3rd direction). For this reason, the image display apparatus can suppress the size in the vertical direction while being worn by the user. Therefore, the image display apparatus can reduce the increase in the size of the casing in the vertical direction while allowing the user to adjust the focus.

The housing holds a fixed distance between the image unit and the deflection member,
The first engaging member and the second engaging member may be provided in the lens unit and may not be provided in the image unit.

In this case, the lens unit is moved in the first direction by the adjusting mechanism according to the operation on the operation member. As a result, the relative distance to the image unit changes and focus adjustment is performed. Since the lens unit does not require external electrical control, a signal line for transmitting an electrical signal is not connected. For this reason, the image display apparatus can smoothly move the lens unit in the left-right direction.

The first engagement member may have a first protrusion that protrudes toward the one side in the second direction.

In this case, the first engagement member and the third engagement member can appropriately suppress the housing from becoming larger in the third direction. Therefore, the image display apparatus can appropriately move the image unit or the lens unit in the first direction.

The length of the first protrusion in the first direction may be longer than the length of the third direction orthogonal to the first direction and the second direction.

In this case, the image display device can prevent the image unit or the lens unit from rotating about the axis extending in the second direction when the operation member is operated. Therefore, the image display apparatus can appropriately perform focus adjustment by moving the image unit or the lens unit in the first direction.

Further, the third engaging member may have a first groove portion that extends in the first direction and into which the first protruding portion is fitted.

The first groove portion can restrict the first protrusion from moving in a direction other than the first direction.

The third engagement member may include a shaft member that extends in the first direction and is inserted through the first protrusion. It can restrict | limit that the 1st protrusion part by which the shaft member was penetrated moves to directions other than a 1st direction.

The first projecting portion is provided at a position including the center in the third direction among the one side in the second direction of at least one of the image unit and the lens unit,
The second engagement member is provided at a position including a center in the third direction among the other side in the second direction of at least one of the image unit and the lens unit,
The third engagement member may be provided at a position including a center in the third direction on an inner surface of the casing at the one side portion in the second direction of the casing.

When the image display device is attached to the user with one side in the third direction up, and when the image display device is attached to the user with the other side in the third direction up The direction of gravity applied to the lens unit changes. On the other hand, the image display apparatus can maintain the image unit and the lens unit horizontally even when the direction of gravity applied to the image unit and the lens unit is changed.

In addition, the first projecting portion has two sliding portions provided apart from each other in the third direction among the one side of the second direction of at least one of the image unit and the lens unit,
Two third engagement members are provided corresponding to the two sliding portions,
The third engagement member may be provided at a position including a center in the third direction on an inner surface of the casing at the one side portion in the second direction of the casing.

The second engaging member has a second projecting portion projecting to the other side in the second direction of at least one of the image unit and the lens unit,
The fourth engagement member may have a spiral second groove portion into which the second protrusion fits.

In this case, the second engagement member and the fourth engagement member can appropriately suppress the housing from becoming larger in the third direction. In addition, by moving the second protrusion along the second groove according to the operation of rotating the operation member, at least one of the image unit and the lens unit is moved in the first direction, and the relative distance between the two is changed. Can be made.

The image unit and the lens unit include a first state in which the relative distance in the first direction between the image unit and the lens unit is the closest, and a second state in which the relative distance is the most separated. Held in the housing movably between,
The one end of the image unit in the first direction is closer to the one side in the first direction than the other end of the lens unit in the first direction in the first state. Arranged,
In the first state, the lens unit has the optical axis in the overlapping portion of the lens unit disposed on the other side in the first direction with respect to the end on the one side in the first direction of the image unit. At least one third projecting portion projecting in a direction intersecting the optical axis,
In the first state, the image unit has the optical axis in the overlapping portion of the image unit arranged on the one side in the first direction with respect to the end on the other side in the first direction of the lens unit. The at least one third projecting portion may have at least one third groove portion that fits from the inside in a portion that is closest to.

In this case, at least one third protrusion fits into at least one third groove at the overlapping portion in the first direction between the image unit and the lens unit, so that the positional relationship in the direction intersecting the third direction is fixed. The Therefore, when at least one of the image unit and the lens unit moves in the first direction according to an operation on the operation member, it is possible to suppress the image unit and the lens unit from moving in a direction intersecting the optical axis. In addition, since at least one 3rd protrusion part and at least 1 3rd groove part are provided in the position close | similar to an optical axis, it can suppress appropriately that an image unit and a lens unit move to the direction which cross | intersects an optical axis. .

The at least one third protrusion has a pair of third protrusions provided on each of one side and the other side of the lens unit overlapping portion in a direction orthogonal to the optical axis,
The at least one third groove portion may include a pair of third groove portions provided on each of one side and the other side of the image unit overlapping portion in a direction orthogonal to the optical axis.

In this case, the positional relationship between the image unit and the lens unit in the direction intersecting the third direction is fixed on both sides of the overlapping portion in the first direction in the direction orthogonal to the first direction. Therefore, when at least one of the image unit and the lens unit moves in the first direction according to an operation on the operation member, it is possible to appropriately suppress the image unit and the lens unit from moving in a direction intersecting the optical axis.

The at least one third protrusion is provided at a position including the center of the lens unit in the second direction,
The at least one third groove may be provided at a position including a center of the image unit in the second direction.

In this case, when at least one of the image unit and the lens unit moves in the first direction according to the operation on the operation member, it is possible to appropriately suppress the image unit and the lens unit from moving in the second direction.

The housing is
A first housing on the one side in the second direction;
A second housing on the other side in the second direction;
The image unit and the lens unit are held in the first housing,
The operation member may be held by the second housing.

As an example, a case where the image display device is attached to the user in a state where the first direction of the housing faces the left-right direction and one side of the second direction faces the user will be described. In this case, the image unit and the lens unit are held in the first housing that is arranged close to the user side. When the image display device is fixed to the user's head by a mounting member or the like, and the mounting member is connected to the first housing, the image unit and the lens unit are appropriately fixed to the user's head. Is done.

A plane portion including a plurality of end portions arranged on the same plane may be provided on the other side of the second direction in the image unit.

In this case, the image unit can be easily placed on a table or the like using the flat surface as a base. For this reason, the image unit can be stabilized when the image display apparatus is manufactured by assembling the image unit in the housing. Thereby, manufacture of an image display apparatus can be facilitated.

Other aspects of the disclosure include
An image display device as described above;
A wearing tool having a first portion extending in the first direction and a pair of second portions extending from both sides of the first portion to the one side in the second direction;
A connection tool connected to the first part of the wearing tool and connected to the image display device;
It is the head mounted display characterized by having provided.

Also,
The first portion is curved in a convex shape toward the other side in the second direction,
The connector extends from the first portion along the third direction;
One end of the connection tool is connected to the wearing tool,
The image display device may be connected to the other end of the connection tool.

It is a perspective view of the spectacles type frame 91 which attached HMD1. It is a top view of HMD1. FIG. 3 is a cross-sectional view taken along the line II in FIG. 2. It is a disassembled perspective view of HMD1 seen from the left diagonal front. 3 is a perspective view of an eyepiece optical system 130 and an adjuster 70 as viewed from the left diagonally rear. FIG. It is a rear view of HMD1. It is a perspective view of the 2nd case 30 seen from the left diagonal front. It is a figure which shows the state by which the eyepiece optical system 130 is arrange | positioned at the leftmost side. It is a figure which shows the state by which the eyepiece optical system 130 is arrange | positioned at the rightmost side. The FIG. 6 is a diagram illustrating a positional relationship between a cam groove and a protrusion 136 in a state where the eyepiece optical system is disposed on the leftmost side. It is a figure which shows the positional relationship of the cam groove 76 and the protrusion part 136 in the state by which the eyepiece optical system 130 is arrange | positioned at the rightmost side. It is a perspective view of HMD101. 3 is a perspective view of a main body member 11. FIG. 3 is a left side view of the main body member 11. FIG. 3 is a perspective view of a housing 12. FIG. It is the figure which looked at the front case 13 from back. FIG. 3 is an exploded perspective view inside the main body member 11. 6 is a left side view of the image unit 7. FIG. 2 is a perspective view of a lens unit 6. FIG. 4 is a right side view of the lens unit 6. FIG. 6 is a rear view of the adjustment mechanism 4. FIG. 7 is a perspective view of a holder 5. FIG. 7 is a perspective view of a holder 5. FIG. It is a figure which shows the state from which the holder 5 and the half mirror 56 were removed from the housing | casing 12. FIG. It is a figure which shows the state in which the holder 5 and the half mirror 56 were mounted | worn with the housing | casing 12. FIG. It is a perspective view of the lens unit 6, the image unit 7, the operation member 3, and the adjustment mechanism 4 in a 1st state. It is a perspective view of the lens unit 6, the image unit 7, the operation member 3, and the adjustment mechanism 4 in a 2nd state. 3 is a left side view of the main body member 11. FIG. It is a perspective view of main body member 11A of HMD1 in a modification.

<First Embodiment>
Hereinafter, HMD1 which is one embodiment of this indication is explained with reference to drawings. In the following description, the upper left, lower, front, rear, left, and right of the HMD 1 are respectively defined as the upper left, lower right, lower left, lower right, upper left, left, and right in FIG. And

First, an outline of the HMD 1 will be described. The HMD 1 is an optically transmissive see-through HMD. The light of the scenery in front of the user's eyes is directly guided to the eyes of the user by passing through the half mirror 80 (see FIG. 2, described later). The projection format of HMD1 is a virtual image projection type. The light of the image displayed on the liquid crystal display device 126 (see FIG. 3, described later) is guided to the user's eyes by reflecting the half mirror 80. With these, the HMD 1 can make the user recognize the image created on the scene in front of the eyes in an overlapping manner.

(1) Housing 10 (first housing 20 and third housing 40)
As shown in FIG. 1, the HMD 1 includes a housing 10. The housing 10 is an example of a support member. The housing 10 has a hollow rectangular parallelepiped shape extending in the left-right direction. The housing 10 is formed of a resin member. The housing | casing 10 is attached to the spectacles type flame | frame 91 so that attachment or detachment is possible. The eyeglass-type frame 91 is an example of a wearing tool worn on the user's head. The eyeglass-type frame 91 includes a left frame portion 92, a right frame portion 93, a central frame portion 94, and an HMD support portion 96. The left frame part 92 is hung on the left ear of the user. The right frame portion 93 is hung on the user's right ear. The central frame portion 94, which is an example of the first portion, extends in the left-right direction between the front end portion of the left frame portion 92 and the front end portion of the right frame portion 93. The left frame portion 92 and the right frame portion 93 extend rearward from both sides of the central frame 94, respectively. The center frame portion 94 includes a pair of nose pads 95 (only one is shown in FIG. 1) at the center in the longitudinal direction. The HMD support portion 96 that is an example of a connection tool is provided on the upper right end side of the center frame portion 94. The HMD support part 96 includes a downward extension part 98. The downward extending portion 98 extends in the vertical direction. The downward extending portion 98 is provided with a plurality of tooth portions (not shown) having saw-like irregularities in the vertical direction.

As shown in FIG. 2, a held portion 49 is provided on the rear surface of the housing 10 facing the spectacle frame 91. The held portion 49 includes a groove 49A extending in the vertical direction. A downward extending portion 98 (see FIG. 1) is fitted in the groove 49A. A leaf spring (not shown) is provided at the bottom of the groove 49A. The leaf spring is locked to one of the tooth portions provided in the downward extending portion 98. As a result, the HMD 1 can be positioned in the vertical direction.

The housing 10 includes a first housing 20, a second housing 30, and a third housing 40. As shown in FIGS. 3 and 4, the first housing 20 has a hollow rectangular parallelepiped shape. The first housing 20 is provided with a left opening 21, a right opening 23, and a rear opening 22. The left opening 21 is provided in the left wall 21 A of the first housing 20. The left opening 21 penetrates the left wall 21A in the left-right direction. The right opening 23 is provided in the right wall 23 A of the first housing 20. The right opening 23 penetrates the right wall 23A in the left-right direction. The rear opening 22 is provided on the rear wall (not shown) of the first housing 20. The rear opening 22 penetrates the rear wall portion in the front-rear direction. The second housing 30 is fixed to the rear wall portion of the first housing 20 so as to close the rear opening 22. Details of the configuration of the second housing 30 will be described later. The third housing 40 is fixed to the right wall portion 23A of the first housing 20 so as to close the right opening 23. Insertion holes 41 (see FIG. 1) are provided on the upper side and the lower side of the right side surface of the third housing 40, respectively. The upper insertion hole 41 corresponds to a screw hole 23B (see FIG. 3) provided on the upper side of the right opening 23 in the right wall 23A. A screw 42 inserted from the right side of the third housing 40 into the upper insertion hole 41 is fastened to the screw hole 23 B, whereby the upper portion of the third housing 40 is fixed to the first housing 20. . The lower insertion hole 41 corresponds to a screw hole (not shown) provided on the lower side of the right opening 23 in the right wall portion 23A. A screw (not shown) inserted from the right side of the third housing 40 into the lower insertion hole 41 is tightened into the screw hole of the right wall portion 23A, so that the lower side portion of the third housing 40 is It is fixed to the first housing 20. Further, the half mirror 80 is fixed to the left wall portion 21 A of the first housing 20. Details of the configuration of the half mirror 80 will be described later.

(2) Control board 110, liquid crystal unit 120, eyepiece optical system 130
As shown in FIG. 3, the control board 110, the liquid crystal unit 120, and the eyepiece optical system 130 are accommodated in the housing 10 in order from the right to the left. The control board 110 acquires image data from an external device (not shown) connected via a communication line (not shown). The liquid crystal unit 120 generates image light based on the image data received by the control board 110. The eyepiece optical system 130 has a plurality of lenses (not shown). The plurality of lenses guide the image light generated by the liquid crystal unit 120 from right to left. The eyepiece optical system 130 is located on the right side of the half mirror 80. At least a part of the image light guided by the eyepiece optical system 130 is reflected backward by the half mirror 80. In the following description, the left-right direction is also referred to as “first direction”, and the front-rear direction is also referred to as “second direction”. In the following description, the traveling direction of the image light reflected by the half mirror 80 (the direction in which the half mirror 80 reflects the image light) is also referred to as “reflection direction”.

As shown in FIG. 4, the liquid crystal unit 120 includes a liquid crystal holder 121, a liquid crystal display device 126, and a liquid crystal substrate 127 (see FIG. 3). The liquid crystal holder 121 includes a support wall 122, a front side wall 123, and a rear side wall 124. The support wall 122 is a substantially rectangular plate-like member that is long in the front-rear direction in plan view. The front side wall 123 and the rear side wall 124 are respectively substantially rectangular plate-like members that are long in the vertical direction when viewed from the front. The front side wall 123 is erected upward from the front end of the support wall 122. The rear side wall portion 124 is erected upward from the rear end portion of the support wall portion 122. The liquid crystal display device 126 has a substantially rectangular parallelepiped shape. The liquid crystal display device 126 is supported from below by the support wall 122 and is sandwiched between the front side wall 123 and the rear side wall 124. Thereby, the liquid crystal display device 126 is held by the liquid crystal holder 121. The liquid crystal substrate 127 is a substrate that controls the liquid crystal display device 126 and is fixed to the right side of the liquid crystal display device 126. The liquid crystal substrate 127 is connected to the control substrate 110 (see FIG. 3) via a flexible printed circuit (FPC) 128 (see FIG. 3). The rear side wall portion 124 is fixed to the second housing 30 with screws 34B (see FIG. 6). That is, the second housing 30 fixes and supports the liquid crystal unit 120. In place of the liquid crystal unit 120, a two-dimensional display element such as DMD or organic EL may be used. Alternatively, a retinal scanning type projection device (Retinal Scanning Display) that projects two-dimensionally scanned light onto the retina of the user is also applicable.

(3) Eyepiece optical system 130
The eyepiece optical system 130 is supported by the second housing 30 so as to be reciprocally movable in the first direction. The eyepiece optical system 130 includes a lens holder 131. The lens holder 131 has a substantially rectangular tube shape. As shown in FIG. 5, the lens holder 131 is provided with inclined portions 132 to 135. The inclined portions 132 to 135 are planar portions in which the rear upper portion, rear lower portion, front lower portion, and front upper portion of the lens holder 131 are chamfered in the left-right direction. A plurality of lenses (not shown) are fixed inside the lens holder 131. The optical axes of the plurality of lenses are arranged on an axis extending in the left-right direction at the center of the lens holder 131.

As shown in FIG. 4, a protrusion 136 is provided on the front side 131 A of the lens holder 131. The protruding portion 136 is formed in a columnar shape and protrudes forward from the front side surface 131A. In other words, the protrusion 136 protrudes in the direction opposite to the reflection direction (hereinafter referred to as the opposite direction). The protrusion 136 is inserted into the cam groove 76 (see FIG. 5) described later from the rear. A pair of sliding portions 146 (see FIG. 5) included in the lens holder 131 will be described later.

(4) Half mirror 80
The half mirror 80 is a plate-like member that is fixed to the front side portion of the left opening 21 in the left wall portion 21 A of the first housing 20. In other words, the first housing 20 fixes and supports the half mirror 80. The half mirror 80 may be formed of, for example, a transparent resin such as acrylic or polycarbonate, optical glass, or the like. The half mirror 80 includes a first plate-like portion 85 and a second plate-like portion 88. The first plate-like portion 85 has a substantially rectangular shape that is long in the vertical direction when viewed from the left side. The second plate-like portion 88 extends obliquely left rearward from the rear end portion of the first plate-like portion 85. The first plate 85 is provided with a round hole 81, an insertion hole 82, and a long hole 83 in order from the top to the bottom. Each of the round hole 81 and the long hole 83 is inserted with a columnar protrusion (not shown) protruding leftward from the left wall 21A. The insertion hole 82 corresponds to a screw hole (not shown) provided in the left wall portion 21A. A screw (not shown) inserted through the insertion hole 82 is fastened to a screw hole (not shown) provided in the left wall portion 21A.

As shown in FIG. 6, the rear surface 88 A of the second plate-shaped portion 88 is a surface on which image light guided by the eyepiece optical system 130 is irradiated. A reflective surface 89 is formed on the surface 88A. The reflection surface 89 is a region that reflects at least a part of the image light guided by the eyepiece optical system 130 in the reflection direction. The reflection surface 89 is, for example, a thin film layer of metal such as aluminum formed on a part of the surface 88A so as to have a predetermined reflectance (for example, 50%). For the formation of the thin film layer, any thin film forming process such as vapor deposition or sputtering may be used. Note that a multilayer film using a metal such as titanium or a dielectric material may be formed on the reflective surface instead of or in addition to aluminum. A multilayer film made of only a dielectric material that does not use metal may be used as the reflecting surface. Instead of the half mirror 80, a reflective member having a mirror surface that can reflect all the image light of the eyepiece optical system 130 may be provided in the first housing 20. This reflecting member can be obtained, for example, by forming a thin film of a metal material such as aluminum having a reflectance of approximately 100% as a mirror surface on a transparent resin such as acrylic or polycarbonate, or a substrate such as optical glass. . For this thin film formation, an arbitrary thin film processing process such as vapor deposition or sputtering is used. Alternatively, the mirror surface may be formed by mirror-polishing the surface using a metal material itself such as aluminum as a base material.

(5) Second housing 30
The configuration of the second housing 30 will be described with reference to FIG. The second housing 30 is disposed on the reflection direction side with respect to the first housing 20. In other words, the second housing 30 that is one of the first housing 20 and the second housing 30 is disposed on the reflection direction side with respect to the first housing 20 that is the other. The second housing 30 includes a front wall portion 31, an upper wall portion 32, and a lower wall portion 33. The front wall portion 31 is a substantially rectangular plate-like member when viewed from the front. The upper wall portion 32 extends forward from the upper end portion of the front wall portion 31. The lower wall portion 33 extends forward from the lower end portion of the front wall portion 31. The second housing 30 is provided with three insertion holes 34 and a pair of guide portions 35. The three insertion holes 34 respectively penetrate the upper left corner, the lower left corner, and the upper right corner of the front wall portion 31 in the front-rear direction. The three insertion holes 34 correspond to three screw holes (not shown) provided in the rear wall portion (not shown) of the first housing 20. A screw 34A (see FIG. 6) is inserted through the insertion hole 34 and tightened into a screw hole in the rear wall portion of the first housing 20, whereby the second housing 30 and the first housing 20 (see FIG. 4). Is fixed. The three screws 34A are arranged on the reflection direction side of the housing 10 (see FIG. 6).

One of the pair of guide portions 35 includes a shaft portion 38. The shaft portion 38 is provided below the front surface of the front wall portion 31. The shaft portion 38 includes two shaft mounting portions 36 and a shaft member 37. The two shaft attachment portions 36 are provided side by side in the first direction. Each of the shaft attachment portions 36 is formed by a pair of wall portions that are spaced apart in the vertical direction and face each other. The shaft member 37 is cylindrical and extends along the first direction. The shaft member 37 has two attachment portions 37A and a sliding portion 37B. The two attachment portions 37 A are formed at both end portions of the shaft member 37. The sliding portion 37 B is formed between the two attachment portions 37 A of the shaft member 37. The diameter of the attachment portion 37A is smaller than the diameter of the slid portion 37B, and is substantially equal to the distance between the pair of wall portions that form the respective shaft attachment portions 36. The shaft member 37 is detachably attached to the shaft attachment portion 36 by fitting the attachment portion 37A to the shaft attachment portion 36 from the front.

The other of the pair of guide portions 35 includes a protruding portion 39. The protruding portion 39 protrudes downward from the lower surface of the upper wall portion 32. In other words, the protruding portion 39 protrudes in a direction that intersects the first direction. The protruding portion 39 is a plate-like member that extends along the first direction and has a thickness in the front-rear direction. The protrusion 39 and the two shaft attachment portions 36 are spaced apart in the vertical direction intersecting the first direction and the second direction.

(6) A pair of sliding portions 146
The pair of sliding portions 146 will be described with reference to FIG. In addition, in FIG. 5, illustration of the housing | casing 10 (refer FIG. 1) is abbreviate | omitted. The pair of sliding portions 146 are projecting portions that project rearward from the rear side of the lens holder 131, for example. The pair of sliding portions 146 are slidable by sliding along the pair of guide portions 35 (see FIG. 7), respectively. One of the pair of sliding portions 146 includes two shaft insertion portions 141. The two shaft insertion portions 141 are provided on the front side and the rear side of the inclined portion 133 from the substantially left and right centers, respectively. The two shaft insertion portions 141 are provided apart from each other in the first direction. Each shaft insertion portion 141 includes a rear protrusion 143 and a hole 144. The rear protrusion 143 is a substantially semicircular plate-like member when viewed from the right side. The hole 144 is a circular opening that penetrates the rear protrusion 143 in the first direction. The hole portions 144 provided in the two shaft insertion portions 141 are separated from each other in the first direction. The inner diameter of the hole 144 is slightly larger than the diameter of the sliding part 37B.

The other of the pair of sliding portions 146 includes an upper standing portion 147. The upper standing portion 147 is provided at the center of the inclined portion 132 on the left and right sides. The upper standing portion 147 is separated from the two shaft insertion portions 141 in the vertical direction. The upper standing portion 147 is disposed at a position between the two shaft insertion portions 141 in the first direction. The upper standing portion 147 is formed by a pair of wall portions that are separated in the front-rear direction and face each other. The upper standing portion 147 slightly extends in the first direction. The upper standing portion 147 includes a groove portion 145. The groove portion 145 is formed between the pair of wall portions of the upper standing portion 147. The groove width of the groove portion 145 is slightly larger than the thickness of the protruding portion 39 (see FIG. 7).

A method for attaching the eyepiece optical system 130 to the second housing 30 will be described. The shaft member 37 (see FIG. 7) removed from the attachment portion 37A (see FIG. 7) is inserted into the two holes 144. After the protrusion 39 (see FIG. 7) is fitted in the groove 145, the two attachment portions 37A are attached to the corresponding shaft attachment portions 36 (see FIG. 7). As a result, the projecting portion 39 can slide along the groove portion 145, and the two shaft insertion portions 141 can slide along the sliding portion 37B. Thereby, the eyepiece optical system 130 is supported by the second housing 30 so as to be reciprocally movable along the first direction. Hereinafter, of the movable range of the eyepiece optical system 130, the position where the eyepiece optical system 130 is on the leftmost side is referred to as a left end position (see FIG. 8A), and the position on the rightmost side is referred to as a right end position (see FIG. 8B).

The left end position is a position where the eyepiece optical system 130 is closest to the half mirror 80 (see FIG. 6). Therefore, the area on the surface 88A (see FIG. 6) to which the light guided by the eyepiece optical system 130 is irradiated becomes the largest when the eyepiece optical system 130 is at the left end position. Hereinafter, this region is referred to as a maximum irradiation region 84 (see FIG. 6). As shown in FIG. 6, the maximum irradiation region 84 is inside the reflection surface 89. That is, the reflective surface 89 includes the maximum irradiation region 84.

(7) Adjuster 70
The adjuster 70 will be described with reference to FIGS. 4 and 5. The adjuster 70 is a circular member in front view. The adjuster 70 is configured to be rotatable about an axis X (see FIG. 5) extending in the front-rear direction. As will be described later, when the adjuster 70 rotates, the eyepiece optical system 130 reciprocates, and the focus adjustment of the HMD 1 is performed.

The adjuster 70 includes a first rotating member 71 and a second rotating member 72. The first rotation member 71 is a member used when the user rotates the adjuster 70. The first rotating member 71 has a substantially circular lid shape when viewed from the front. The first rotating member 71 includes a front wall portion 73 and a peripheral wall portion 74. The front wall portion 73 is a substantially circular plate-like member when viewed from the front. The peripheral wall portion 74 extends rearward from the peripheral edge portion of the front wall portion. The peripheral wall portion 74 is rotatably attached to the outer peripheral surface of a cylindrical attachment portion (not shown) protruding forward from the front wall portion 20A. On the outer peripheral surface of the peripheral wall portion 74, an uneven portion 74 A is provided across the circumferential direction of the peripheral wall portion 74. The uneven portion 74 A prevents the finger from sliding relative to the peripheral wall portion 74 when the user pinches the outer peripheral surface of the peripheral wall portion 74 with a finger (not shown) and rotates the first rotating member 71.

The second rotating member 72 is a substantially circular plate-like member when viewed from the front. The second rotating member 72 is located behind the first rotating member 71 with the front wall portion 20A interposed therebetween. That is, the second rotating member 72 is located inside the first housing 20. The second rotating member 72 is arranged coaxially with the first rotating member 71. A screw member 75 is provided at the center of the second rotating member 72. The screw member 75 passes through a through hole (not shown) passing through the front wall portion 20 A of the first housing 20 inside the attachment portion, and is tightened to the center portion of the first rotating member 71. Thereby, the 1st rotation member 71 and the 2nd rotation member 72 rotate integrally. On the outer peripheral surface of the second rotating member 72, an uneven portion 72A is provided in the circumferential direction. Any one of the concavo-convex portions 72 A is engaged with a leaf spring (not shown) provided inside the housing 10.

A cam groove 76 is provided on the rear side surface of the second rotating member 72. The cam groove 76 is a groove formed by a part of the rear side surface of the second rotating member 72 being recessed forward. The cam groove 76 extends in a spiral shape around the axis X of the adjuster 70. The cam groove 76 extends away from the axis X of the adjuster 70 in the clockwise direction in the rear view (see FIG. 9A). The cam groove 76 includes a start end 76A and a terminal end 76B. The start end 76A is an end portion on the clockwise side of the cam groove 76 in the rear view, and the end end 76B is an end portion on the counterclockwise direction side. A start end 76A that is one end in the extending direction of the cam groove 76 is farther from the axis X of the adjuster 70 than a terminal end 76B that is the other end in the extending direction.

The cam groove 76 in the present embodiment is formed on the rear side surface of the second rotating member 72 so that the angle range is about 170 degrees. More specifically, among the angles formed by the plane 78 (see FIG. 9A) including the start end 76A and the axis X and the plane 79 (see FIG. 9A) including the end 76B and the axis X (see FIG. 9A), Hereinafter, the first angle is about 170 degrees (see FIG. 9A). That is, the first angle is not less than 90 degrees and not more than 180 degrees. Of course, the first angle may be less than 90 degrees or greater than 180 degrees.

A protrusion 136 (see FIG. 4) is inserted into the cam groove 76 from behind. In other words, the protrusion 136 is inserted into the cam groove 76 from the reflection direction side. When the second rotating member 72 rotates, the protrusion 136 is reciprocated in the first direction by the inner wall surface of the cam groove 76, and the eyepiece optical system 130 can reciprocate in the first direction. When the protrusion 136 is in contact with the start end 76A, the eyepiece optical system 130 is located at the left end position, and when the protrusion 136 is in contact with the terminal end 76B, the eyepiece optical system 130 is located at the right end position.

(8) Focus Adjustment Next, a focus adjustment method will be described with reference to FIGS. 8A, 8B, 9A, and 9B. In the following description, it is assumed that the eyepiece optical system 130 before focus adjustment is located at the left end position. 8A and 8B, illustration of the half mirror 80, the first housing 20, and the third housing 40 is omitted. As shown in FIGS. 8A and 9A, the user pinches the concavo-convex portion 74A with a finger (not shown) and turns it counterclockwise (in the direction of arrow A in FIG. 8A and in the direction of arrow C in FIG. 9A) in front view. Rotate. Alternatively, the user may rotate the first rotating member 71 by sandwiching the casing 10 from above and below with fingers (for example, thumb and index finger) and expanding and contracting the fingers (for example, middle finger). In this case, the cam groove 76 also rotates as the second rotating member 72 rotates. The outer wall surface of the cam groove 76 moves the abutting convex portion 136 to the right (the direction of arrow B in FIG. 8A and the direction of arrow D in FIG. 9A) as it rotates. As the convex portion 136 moves, the upper standing portion 147 (see FIG. 5) moves to the right while sliding along the protruding portion 39 (see FIG. 7), and the two shaft insertion portions 141 (see FIG. 5) are moved. 5) moves to the right while sliding along the sliding part 37B (see FIG. 7). That is, the pair of sliding portions 146 (see FIG. 5) slides along each of the pair of guide portions 35 (see FIG. 7). As a result, the eyepiece optical system 130 moves from the left end position to the right. In this case, the groove portion 145 (see FIG. 5) of the upper standing portion 147 prevents the eyepiece optical system 130 from rotating about the axis of the two hole portions 144.

8B and 9B, when the second rotating member 72 rotates about 170 degrees counterclockwise when viewed from the front, the terminal end 76B comes into contact with the protrusion 136. In this case, the eyepiece optical system 130 moves to the right end position. Even when the eyepiece optical system 130 moves from the left end position to the right end position, the user may rotate the adjuster 70 about 170 degrees. Therefore, the user does not need to change the adjuster 70 pinched with fingers. If the angle range in which the cam groove 76 is formed is larger than 180 degrees (the first angle is larger than 180 degrees), when moving the eyepiece optical system 130 from the left end position to the right end position, the user The adjuster 70 needs to be rotated more than 180 degrees around the axis X. Therefore, the user needs to change the adjuster 70 pinched with fingers. This is because it is difficult to rotate an object pinched with a finger 180 degrees or more without changing the object due to the structure of a human hand.

Thus, when the adjuster 70 rotates, the eyepiece optical system 130 moves relative to the half mirror 80 and the liquid crystal unit 120 along the pair of guide portions 35 along the first direction. Since the amount of movement of the eyepiece optical system 130 can be adjusted according to the amount of rotation of the adjuster 70, the HMD 1 can perform focus adjustment. In addition, when the 2nd rotation member 72 rotates, the uneven | corrugated | grooved part 72A which the leaf | plate spring (not shown) provided in the housing | casing 10 latches switches sequentially. Therefore, the HMD 1 can reliably make the user sense that the adjuster 70 is rotating.

The first rotating member 71 is provided on the front surface of the front wall portion 20A of the first housing 20. As a result, even if the HMD 1 provided on the upper right end side of the central frame portion 94 (see FIG. 1) is provided on the upper left end side of the central frame portion 94 in the state where the upper and lower sides and the left and right sides are reversed, The 1 rotation member 71 remains positioned on the front side of the first housing 20. Therefore, the user who performs the focus adjustment can touch the first rotating member 71 without hesitation, regardless of whether the position where the HMD 1 is provided is on the left or right side of the central frame portion 94. Therefore, the HMD 1 can improve the focus adjustment operability.

As described above, when the user performs focus adjustment, if the adjuster 70 is rotated, the eyepiece optical system 130 moves relative to the half mirror 80 and the liquid crystal unit 120 in the first direction. In this case, the liquid crystal display device 126 remains fixed to the second housing 30. Therefore, the liquid crystal display device 126 does not reciprocate in the first direction in accordance with the focus adjustment and receives a load that hinders the movement from the FPC or the like. Therefore, the liquid crystal display device 126 that generates image light is not easily inclined with respect to the first direction. Accordingly, the HMD 1 can make it difficult to deform an image that is visually recognized by the user even when focus adjustment is performed.

Further, the eyepiece optical system 130 moves in the first direction as the pair of sliding portions 146 slide along the pair of guide portions 35. Since the pair of guide portions 35 guide the eyepiece optical system 130 along the first direction, the eyepiece optical system 130 is easy to reciprocate and is not easily tilted with respect to the first direction. Therefore, the HMD 1 can further make it difficult to deform an image to be visually recognized by the user when performing focus adjustment.

Further, the screw 34A for fixing the first housing 20 and the second housing 30 is disposed in a portion of the housing 10 on the reflection direction side. The screw 34 A is difficult to be seen from a viewpoint other than the user when the HMD 1 is used. Therefore, the HMD 1 can improve the appearance of the appearance. In addition, the structure which fixes the 1st housing | casing 20 and the 2nd housing | casing 30 is not limited to the screw 34A. For example, instead of the screw 34 A, a groove recessed forward may be provided in the rear wall portion of the first housing 20, and a claw may be provided on the front surface of the front wall portion 31 of the second housing 30. The first housing 20 and the second housing 30 may be fixed by engaging a claw provided in the second housing 30 with the groove of the first housing 20.

Moreover, the eyepiece optical system 130 is reciprocated along the first direction only by inserting the shaft member 37 into the hole 144, fitting the protrusion 39 into the groove 145, and attaching the shaft member 37 to the shaft attachment portion 36. It becomes possible to move. Therefore, the HMD 1 can improve assemblability.

The upper standing portion 147 is disposed at a position between the two shaft insertion portions 141 in the first direction. The upper standing portion 147 can stably prevent the eyepiece optical system 130 from rotating about the axis of the two holes. Therefore, the HMD 1 can further stabilize the reciprocating movement of the eyepiece optical system 130.

Further, when the adjuster 70 rotates, the eye groove optical system 130 can reciprocate because the cam groove 76 reciprocates the protrusion 136 along the first direction. The user can reciprocate the eyepiece optical system 130 simply by rotating the adjuster 70. Therefore, the HMD 1 can improve operability when performing focus adjustment.

Further, the first angle (about 170 degrees) is 90 degrees or more and 180 degrees or less. When the angle range in which the cam groove 76 is formed is smaller than 90 degrees (the first angle is smaller than 90 degrees), the adjuster 70 is used for the eyepiece optical system 130 to reciprocate by the same amount of movement as in the present embodiment. The amount of movement of the eyepiece optical system 130 along the first direction per unit rotation amount increases. Since the angle range in which the cam groove 76 is formed is 90 degrees or more, the amount of movement of the eyepiece optical system 130 along the first direction per unit rotation amount of the adjuster 70 is suppressed. In addition, since the first angle is 180 degrees or less, the user does not have to change the adjuster 70 pinched with a finger when performing the focus adjustment. Therefore, when the first angle is 90 degrees or more and 180 degrees or less, the user can finely adjust the eyepiece optical system 130 without changing the adjuster 70 pinched with a finger. Accordingly, the HMD 1 can further improve the focus adjustment operability.

Further, the reflection surface 89 includes the maximum irradiation region 84. Accordingly, the image light that the eyepiece optical system 130 irradiates to the surface 88 A does not deviate from the reflecting surface 89 regardless of the reciprocating position. Therefore, the HMD 1 can make the user visually recognize the image light image stably regardless of the position of the eyepiece optical system 130.

Further, in a state in which the HMD 1 is mounted on the user, the projecting portion 136, the pair of sliding portions 146, the pair of guide portions 35, and the cam groove 76 are arranged in the front-rear direction with respect to the user, and the vertical direction Not placed in. For this reason, HMD1 can suppress the magnitude | size of an up-down direction in the state with which the user was mounted | worn. Therefore, the possibility that the user's field of view is blocked by the housing 10 is reduced. Therefore, HMD1 can maintain a user's visual field favorably in the state with which the user was equipped.

Second Embodiment
Next, another embodiment of the present disclosure will be described with reference to the drawings. As shown in FIG. 10, the HMD 101 is an optically transmissive see-through HMD. The light in the scene in front of the user's eyes is guided directly to the user's eyes by passing through the half mirror 56. The projection format of the HMD 101 is a virtual image projection type. The half mirror 56 reflects the light of the image displayed on the liquid crystal panel 72B (see FIG. 15, described later) toward the eye on one side of the user. The HMD 101 can allow the user to recognize an image superimposed on the scene in front of him. The HMD 101 includes a main body member 11, a mounting tool 8, and a connection tool 9. Hereinafter, in order to help understand the description of the figure, the upper side, lower side, left side, right side, front side, and rear side of the HMD 101 are defined. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the HMD 101 correspond to, for example, the upper side, the lower side, the left side, the right side, the lower left diagonal side, and the upper right diagonal side of FIG. The upper side, lower side, left side, right side, front side, and rear side of the HMD 101 correspond to directions when the wearing tool 8 is worn by the user.

<Mounting tool 8, connecting tool 9, body member 11>
The mounting tool 8 is made of a flexible material such as resin or metal (for example, stainless steel). The mounting tool 8 includes a first portion 8A and

second portions

8B and 8C. The first portion 8A and the

second portions

8B and 8C are each a curved elongated plate-like member. The first portion 8A extends in the left-right direction and is curved in a convex shape on the front side. The second portion 8B extends from an end portion on one side (for example, the left side) of the first portion 8A. The second portion 8C extends from the end portion on the other side (for example, the right side) of the first portion 8A. The

second portions

8B and 8C each extend in a direction in which end portions on the opposite side (for example, rear side) to the side connected to the first portion 8A approach each other. The wearing tool 8 is worn on the user's head with the first part 8A, the

second part

8B, and 8C in contact with the frontal, right and left heads of the user, respectively. Is done. In this state, the first portion 8A extends in the left-right direction along the forehead of the user.

接続 Connector 9 is rod-shaped. The connection tool 9 is made of resin or metal. One end side (for example, the upper side) of the connection tool 9 is connected to the vicinity of a portion of the first portion 8A of the mounting tool 8 that is connected to the second portion 8C. The connection tool 9 and the mounting tool 8 are connected by a ball joint. A body member 11 to be described later is connected to the other end side (for example, the lower side) of the connection tool 9. The connection tool 9 and the main body member 11 are connected by a ball joint. The connection tool 9 holds the main body member 11 at a position separated from the mounting tool 8. The connection tool 9 can arrange | position the half mirror 56 of the main body member 11 ahead of a user's left eye in the state in which the mounting tool 8 was worn by the user's head.

As shown in FIGS. 10, 11, and 12, the main body member 11 includes a housing 12, an operation member 3, an adjustment mechanism 4 (see FIG. 6), a deflection unit 59, a lens unit 6 (see FIG. 15), and an image unit. 7 (see FIG. 6). The deflection unit 59 has a holder 5 and a half mirror 56.

<Case 12>
As shown in FIGS. 10, 11, and 13, the housing 12 includes a main body portion 12 A and a protruding portion 12 B. The housing 12 is an example of a support member. The main body 12A has a substantially rectangular parallelepiped shape with curved corners. The protrusion 12B protrudes rearward from the right rear side of the main body 12A. The housing 12 has a hollow box shape. The front side, the upper side, the lower side, the rear side, and the right side of the main body 12A are respectively a first casing 1021, a second casing 1022, a third casing 1023 (see FIG. 10), and a fourth casing 24 ( 13) and the fifth casing 25 (see FIG. 10). The front surface of the first housing 1021, the upper surface of the second housing 1022, the lower surface of the third housing 1023, the rear surface of the fourth housing 24, and the fifth housing 25 The right surfaces are referred to as a first surface 21M, a second surface 22M, a third surface 23M, a fourth surface 24M (see FIG. 13), and a fifth surface 25M (see FIG. 10), respectively. The left side of the housing 12 is opened, and the left side of a lens unit 6 (described later) inside the housing 12 is exposed. The left side of the lens unit 6 is not covered by the housing 12.

As shown in FIGS. 10 and 11, in the vicinity of the portion where the first surface 21M and the second surface 22M are connected (hereinafter referred to as the curved portion 212), the portion where the first surface 21M and the third surface 23M are connected. (Hereinafter, referred to as a curved portion 213) is curved. As shown in FIG. 10, in the vicinity of a portion where the first surface 21M and the fifth surface 25M are connected (hereinafter referred to as a curved portion 215), in the vicinity of a portion where the second surface 22M and the fifth surface 25M are connected ( Hereinafter, the curved portion 225) and the vicinity of the portion where the third surface 23M and the fifth surface 25M are connected (hereinafter referred to as the curved portion 235) are curved.

In the following, a position where the tangent is inclined 45 degrees with respect to the horizontal direction in the curved portion 212 is defined as a connection position 212S (see FIG. 12). The connection position 212S is a position where the first surface 21M and the second surface 22M are connected. The connection position 212S is also a position where the first housing 1021 and the second housing 1022 are connected. A position where the tangent is inclined 45 degrees with respect to the horizontal direction in the curved portion 213 is defined as a connection position 213S (see FIG. 12). The connection position 213S is a position where the first surface 21M and the third surface 23M are connected. The connection position 213S is also a position where the first housing 1021 and the third housing 1023 are connected. A position where the tangent is inclined 45 degrees with respect to the horizontal direction in the curved portion 215 is defined as a connection position 215S. The connection position 215S is a position where the first surface 21M and the fifth surface 25M are connected. The connection position 215S is also a position where the first housing 1021 and the fifth housing 25 are connected. A position where the tangent is inclined 45 degrees with respect to the horizontal direction in the curved portion 225 is defined as a connection position 225S. The connection position 225S is a position where the second surface 22M and the fifth surface 25M are connected. The connection position 225S is also a position where the second housing 1022 and the fifth housing 25 are connected. A position where the tangent is inclined 45 degrees with respect to the horizontal direction in the curved portion 235 is defined as a connection position 235S. The connection position 235S is a position where the third surface 23M and the fifth surface 25M are connected. The connection position 235S is also a position where the third housing 1023 and the fifth housing 25 are connected.

The second surface 22M is inclined obliquely downward as it goes from the rear side to the front side. The third surface 23M is inclined obliquely upward as it goes from the rear side to the front side. For this reason, the vertical distance between the second surface 22M and the third surface 23M gradually decreases from the rear side toward the front side. Therefore, the length in the vertical direction of the fifth surface 25M, in other words, the length in the vertical direction between the connection position 225S and the connection position 235S gradually decreases from the rear side toward the front side.

As shown in FIG. 11, the left end 21 C of the first housing 1021 is recessed rightward from both ends in the vertical direction toward the center in the vertical direction. The left end 21C forms a substantially arc. The rightmost position of the left end 21C is arranged on the right side of the leftmost position of the left end 22C of the second casing 1022 and the left end 23C of the third casing 1023. As shown in FIG. 13, the leftmost position of the left end 24C of the fourth housing 24 is arranged on the right side of the leftmost positions of the left ends 21C, 22C, and 23C.

Hereinafter, of each of the first housing 1021, the second housing 1022, the third housing 1023, and the fourth housing 24, the portion on the left side of the lens unit 6 (see FIG. 15), which will be described later, The first extension portion 1021A, the second extension portion 22A, the third extension portion 1023A, and the fourth extension portion 24A. The first extending portion 1021A corresponds to a portion extending between the left end of the lens unit 6 and the left end 21C. The second extending portion 22A corresponds to a portion extending between the left end of the lens unit 6 and the left end 22C. The third extending portion 1023A corresponds to a portion extending between the left end of the lens unit 6 and the left end 23C. The fourth extending portion 24A corresponds to a portion extending between the left end of the lens unit 6 and the left end 24C. The upper side of the first extension part 1021A is connected to the front side of the second extension part 22A. The lower side of the first extension part 1021A is connected to the front side of the third extension part 1023A. The rear surface of the first extension portion 1021A, the lower surface of the second extension portion 22A, and the upper surface of the third extension portion 1023A are respectively a first back surface 21B, a second back surface 22B, This is referred to as a third back surface 1023B. The second back surface 22B and the third back surface 1023B face each other.

As shown in FIGS. 13 and 14, a front first regulating member 221A is provided on the front side of the second back surface 22B. The front first regulating member 221A is a plate-like member that extends downward from the inside of the curved portion 212 (see FIG. 10) of the second back surface 22B. As shown in FIG. 5, a front first regulating member 231A is provided on the front side of the third back surface 1023B. The front first regulating member 231A is a plate-like member extending upward from the inside of the curved portion 213 (see FIG. 10) in the third back surface 1023B. Both surfaces of the front

first regulating members

221A and 231A face in the left-right direction. The positions in the left-right direction of the first

front regulating members

221A and 231A are equal.

As shown in FIG. 13, a rear first regulating member 221B is provided on the rear side of the second back surface 22B. The rear first regulating member 221B is a plate-like member that extends downward along the rear end of the second extending portion 22A. A rear first restriction member 231B is provided on the rear side of the third back surface 1023B. The rear first regulating member 231B is a plate-like member extending upward along the rear end of the third extending portion 1023A. Both surfaces of the rear first regulating

members

221B and 231B face in the front-rear direction. The position in the left-right direction of the front

first restriction members

221A and 231A is substantially equal to the position in the left-right direction of the right end of the rear

first restriction members

221B and 231B. The right end of the rear first regulating member 221B, the upper end of the left end 24C of the fourth housing 24, and the second back surface 22B form a groove 221C that is recessed upward. The right end of the rear first restriction member 231B, the lower end of the left end 24C of the fourth housing 24, and the third back surface 1023B form a groove 231C that is recessed downward.

As shown in FIGS. 13 and 14, a hole 21 D penetrating in the front-rear direction is provided at the center in the vertical direction of the first housing 1021 and on the left side of the center in the horizontal direction of the housing 12. A protrusion 4A (see FIG. 15) of the adjusting mechanism 4 described later fits into the hole 21D from the rear side. Around the hole 21D of the first housing 1021, a recess 21E that is recessed in a circular shape toward the rear is provided. An operation member 3 (see FIG. 15) to be described later fits into the recess 21E from the front side. In the first back surface 21B, the second regulating member 211 is provided on the left side of the recess 21E and in the vicinity of the left end 21C. The second restricting member 211 is a plate-like member extending rearward from a position including the center in the vertical direction of the first back surface 21B. For example, the second regulating member 211 is provided symmetrically with respect to a plane that passes through the center of the first back surface 21B in the vertical direction and is parallel to the front-rear and left-right directions. Both surfaces of the second regulating member 211 face in the left-right direction. As shown in FIG. 14, the second restricting member 211 is disposed on the right side of the left and right positions of the front first restricting members 221 A and 231 A. As shown in FIG. 13, the second restriction member 211 is disposed on the right side of the position in the left-right direction of the right end of each of the rear first restriction members 221 B and 231 B. The length in the left-right direction between the right end of each of the front

first regulating members

221A, 231A and the rear first regulating

members

221B, 231B and the left end of the second regulating member 211 is a holder 5 (see FIG. 20) is equal to the length (thickness) in the left-right direction of the first end 51 (see FIG. 20).

As shown in FIG. 13, a plurality of holes 24 D and a plurality of holes 24 E penetrating in the front-rear direction are provided in the fourth housing 24 on the right side of the center in the left-right direction of the housing 12. Each of the plurality of holes 24 D is a plurality of screw holes for attaching an image unit 7 described later to the housing 12. Each of the plurality of holes 24 E is a plurality of screw holes for attaching the connector 9 to the housing 12. A hole 25D penetrating in the front-rear direction is provided at the rear end of the protruding portion 12B. A communication line 28 (see FIG. 11) is connected to the hole 25D. The HMD 101 is connected to an external device (not shown) via the communication line 28. The external device outputs image data to the HMD 101.

The housing engaging portion 241 is provided at the fourth extending portion 24A of the fourth housing 24, more specifically, at the left end 24C of the fourth housing 24. The housing engaging portion 241 is a plate-like member that extends leftward from a position including the center in the vertical direction of the left end 24 C of the fourth housing 24. The housing engaging portion 241 is provided symmetrically with respect to a plane that passes through the center of the left end 24C in the up-down direction and is parallel to the front-rear left-right direction, for example.

As shown in FIG. 15, the housing 12 is formed by combining a front housing 13 and a rear housing 14. The front housing 13 includes a front housing portion of each of the first housing 1021, the second housing 1022, and the third housing 1023, and a fifth housing 25. The rear housing 14 includes rear portions of the second housing 1022 and the third housing 1023, and a fourth housing 24. The lens unit 6, the image unit 7, and the engaging portion 4 B of the adjusting mechanism 4 are disposed in the housing 12. The holder 5 is held at the left end of the housing 12. The holder 5, the lens unit 6, and the image unit 7 are arranged in order from the left side to the right side. The adjustment mechanism 4 is disposed on the front side of the lens unit 6. A groove 242 that is recessed rearward at a position including the center in the vertical direction on the front surface of the rear end portion (fourth housing 24) of the rear housing 14, that is, the inner surface of the fourth housing 24. Is provided. For example, the groove 242 is provided symmetrically with respect to a plane that passes through the center of the inner surface of the fourth housing 24 in the vertical direction and is parallel to the front-rear and left-right directions. The groove portion 242 extends in a straight line in the left-right direction.

<Image unit 7>
The image unit 7 generates and emits image light of an image corresponding to image data received from an external device via the communication line 28 (see FIG. 11). As shown in FIG. 15, the image unit 7 includes a first holding member 1071, a liquid crystal display device 1072, and a second holding member 1073.

The first holding member 1071 includes a cylindrical member 71A and

side plate members

71B, 71C, 71D. The cylindrical member 71A is a substantially cylindrical member extending in the left-right direction. Each optical axis 77 (see FIG. 16) of a plurality of lenses 63 to be described later is disposed on an axis extending in the left-right direction at the center of the cylindrical member 71A. As shown in FIG. 16, each of the upper part and the lower part of the cylindrical member 71 A is not curved and extends along a plane orthogonal to the vertical direction. Hereinafter, the upper portion of the cylindrical member 71A is referred to as a plane portion 713. The lower portion of the cylindrical member 71A is referred to as a plane portion 714. The portions other than the

flat portions

713 and 714 of the cylindrical member 71A, in other words, the front side portion and the rear side portion of the cylindrical member 71A are referred to as a curved portion 715. The length from the optical axis 77 to the

plane portions

713 and 714 is equal to or shorter than the length from the optical axis 77 to the curved portion 715. The length from the optical axis 77 to the

plane portions

713 and 714 is the shortest at the center in the front-rear direction of each of the

plane portions

713 and 714. A groove portion 713A having an inner surface recessed upward is provided at a position including the front-rear direction center of the flat surface portion 713. The groove portion 713A is provided symmetrically with respect to a plane that passes through the center in the front-rear direction of the plane portion 713 and is parallel to the up-down and left-right directions, for example. A groove portion 714A having an inner surface recessed downward is provided at a position including the front-rear direction center of the flat portion 714. For example, the groove 714A is provided symmetrically with respect to a plane that passes through the center in the front-rear direction of the plane part 714 and is parallel to the upper, lower, left, and right directions. Each of the

groove portions

713A and 714A extends between both left and right end portions of the cylindrical member 71A.

As shown in FIG. 15, the

side plate members

71B, 71C, 71D are flat plate-like members extending from the right end portion of the cylindrical member 71A to the right side. Of the plurality of parallel planes of the side plate members 71B and 71C, each of the pair of planes having the largest area faces the front-rear direction. Of the plurality of parallel planes of the side plate member 71D, each of the pair of planes having the largest area faces in the vertical direction. The lower end of the side plate member 71B is connected to the front end of the side plate member 71D, and the lower end of the side plate member 71C is connected to the rear end of the side plate member 71D. Screws inserted into the plurality of holes 24D (see FIG. 13) are fastened to screw holes 711 provided in the side plate member 71C. As a result, the image unit 7 is held by the rear housing 14 of the housing 12 and the position with respect to the housing 12 is fixed.

As shown in FIG. 16, the image unit 7 has projecting

portions

712A, 712B, and 712C that project forward from the side plate member 71B. The

protrusions

712A, 712B, 712C are plate-shaped. The

protrusions

712A and 712B extend in parallel in the left-right direction. The protrusion 712A is disposed above the protrusion 712B. The protruding portion 712C extends in the vertical direction. The upper end of the protrusion 712C is connected to the right end of the protrusion 712A, and the lower end of the protrusion 712C is connected to the right end of the protrusion 712B. The front-rear direction positions of the front end portions of the projecting

portions

712A, 712B, and 712C are the same. That is, the front end portions of the projecting

portions

712A, 712B, and 712C are arranged on a virtual plane orthogonal to the front-rear direction. Hereinafter, the protruding

portions

712A, 712B, and 712C are collectively referred to as the protruding portion 712.

As shown in FIG. 15, the liquid crystal display device 1072 has a glass substrate 1072A and a liquid crystal panel 72B. The glass substrate 1072A and the liquid crystal panel 72B are disposed in a portion of the first holding member 1071 surrounded by the

side plate members

71B, 71C, 71D. The liquid crystal panel 72B is a well-known rectangular liquid crystal panel. The liquid crystal panel 72B generates image light by displaying an image on the left side surface. The glass substrate 1072A is provided on the left side surface of the liquid crystal panel 72B, and protects the display surface of the liquid crystal panel 72B. For example, when the liquid crystal panel 72B is a reflective liquid crystal, light from a light source (not shown) enters the liquid crystal panel 72B. The liquid crystal panel 72B reflects the incident light to generate image light. The image light generated by the liquid crystal panel 72B passes through the glass substrate 1072A to the left.

The second holding member 1073 has a substrate holding portion 73A and a control substrate 73B. The substrate holding portion 73A is disposed on the right side of the liquid crystal panel 72B of the liquid crystal display device 1072. The control board 73B is disposed on the right side of the board holding portion 73A. The control board 73B is connected to the liquid crystal panel 72B via a flexible printed board (not shown). The communication line 28 (see FIG. 11) is connected to the control board 73B. The control board 73 B receives the image data transmitted from the external device via the communication line 28. The control board 73B outputs a control signal to the liquid crystal panel 72B via the flexible printed board, thereby causing the liquid crystal panel 72B to display an image corresponding to the image data.

In the present invention, a two-dimensional display device such as a digital mirror device (DMD) or an organic EL may be used instead of the liquid crystal panel 72B. Further, a retina scanning type projection device (Retinal Scanning Display) that projects light two-dimensionally scanned onto the retina of the user may be used.

<Lens unit 6>
The lens unit 6 is disposed on the left side of the image unit 7. The lens unit 6 guides the image light emitted from the image unit 7 to the half mirror 56 disposed on the left side of the lens unit 6. The lens unit 6 includes a holding member 61, a cylindrical member 62, and a plurality of lenses 63.

The holding member 61 is a substantially cylindrical member extending in the left-right direction. A plurality of lenses 63 are fixed inside the holding member 61. Each optical axis of the plurality of lenses 63 is disposed on an axis extending in the left-right direction at the center of the holding member 61. As shown in FIG. 18, each of the upper part and the lower part of the holding member 61 is not curved and extends along a plane orthogonal to the vertical direction. Hereinafter, the upper part of the holding member 61 is referred to as a plane portion 61C. The lower part of the holding member 61 is referred to as a plane part 61D. A bending portion constructed between the front end portions of the

plane portions

61C and 61D is referred to as a bending portion 61A. A bending portion constructed between the rear end portions of the

plane portions

61C and 61D is referred to as a bending portion 61B.

A protruding portion 64 that protrudes forward is provided at a position including the center in the vertical direction in the curved portion 61A. For example, the protruding portion 64 is provided symmetrically with respect to a plane that passes through the center of the bending portion 61A in the vertical direction and is parallel to the front-rear and left-right directions. The protrusion 64 is cylindrical. The protrusion 64 fits in the cam groove 42 (see FIG. 19) of the engaging portion 4B of the adjusting mechanism 4 described later. A protruding portion 65 that protrudes rearward is provided at a position including the center in the vertical direction in the curved portion 61B. For example, the protruding portion 65 is provided symmetrically with respect to a plane that passes through the center of the bending portion 61B in the vertical direction and is parallel to the front-rear and left-right directions. As shown in FIG. 17, the protrusion 65 is rod-shaped. The length of the protrusion 65 in the left-right direction is longer than the length in the up-down direction. The protrusion 65 fits into the groove 242 (see FIG. 15) of the fourth housing 24. Accordingly, the lens unit 6 is held by the rear housing 14 of the housing 12 so as to be movable in the left-right direction.

As shown in FIG. 15, the cylindrical member 62 is a substantially cylindrical member extending in the left-right direction. The cylindrical member 62 is provided on the right side of the holding member 61. Each optical axis 77 (see FIG. 18) of the plurality of lenses 63 is disposed on an axis extending in the left-right direction at the center of the cylindrical member 62. As shown in FIG. 18, each of the upper part and the lower part of the cylindrical member 62 is not curved and extends along a plane orthogonal to the vertical direction. Hereinafter, the upper part of the cylindrical member 62 is referred to as a plane part 62C. The lower part of the cylindrical member 62 is referred to as a plane part 62D. Portions other than the

flat portions

62C and 62D of the cylindrical member 62, in other words, the front side portion and the rear side portion of the cylindrical member 62 are referred to as a curved portion 62A. The length from the optical axis 77 to the

plane portions

62C and 62D is equal to or shorter than the length from the optical axis 77 to the curved portion 62A. The length from the optical axis 77 to the

plane portions

62C and 62D is the shortest at the front-rear direction center of each of the

plane portions

62C and 62D. A protruding portion 621C that protrudes upward from the outer surface is provided at a position including the center in the front-rear direction of the flat portion 62C. For example, the protruding portion 621C is provided symmetrically with respect to a plane that passes through the center in the front-rear direction of the plane portion 62C and is parallel to the upper, lower, left, and right directions. A protruding portion 621D that protrudes downward from the outer surface is provided at a position including the center in the front-rear direction of the flat portion 62D. For example, the protruding portion 621D is provided symmetrically with respect to a plane that passes through the center in the front-rear direction of the plane portion 62D and is parallel to the up-down and left-right directions. Each of the protrusions 621 C and 621 D extends across the left and right ends of the cylindrical member 62. The lengths of the

protrusions

621C and 621D in the front-rear direction are substantially the same as the lengths of the

grooves

713A and 714A (see FIG. 16), respectively.

The sectional shape of the outer wall surface of the cylindrical member 62 of the lens unit 6 and the sectional shape of the inner wall surface of the cylindrical member 71A of the cylindrical member 71A of the image unit 7 are substantially equal. At least a part of the right side of the cylindrical member 62 fits inside at least a part of the left side of the cylindrical member 71A. In this state, the left end portion of the cylindrical member 71 A is disposed on the left side of the right end portion of the cylindrical member 62. The cylindrical member 62 and the cylindrical member 71A overlap in the left-right direction. At this time, at least a part on the right side of the protruding portion 621C of the cylindrical member 62 is an overlapping portion in the left-right direction with the cylindrical member 71A, and fits into at least a part on the left side of the groove portion 713A. At least a part on the right side of the protruding part 621D of the cylindrical member 62 is an overlapping part in the left-right direction with the cylindrical member 71A and fits to at least a part on the left side of the groove part 714A of the cylindrical member 71A.

The image light generated by the image unit 7 enters the inside of the cylindrical member 62 from the right side, passes through the holding member 61 and the inside of the cylindrical member 62, and exits from the left end of the holding member 61 toward the left side. The plurality of lenses 63 refracts image light incident from the right side and emits it to the left side.

<Operation member 3>
As shown in FIG. 15, the operation member 3 is a truncated cone-shaped member. The central axis of the operation member 3 extends in the front-rear direction. The operation member 3 can be rotated with the central axis as a fulcrum. The operation member 3 has a front end surface 3A, a rear end surface 3B, and a side surface 3C. The front end surface 3 A is a bottom portion on the front side of the operation member 3. The front end surface 3A corresponds to the upper base of the truncated cone shape. The rear end surface 3 B is a bottom surface on the rear side of the operation member 3. The rear end surface 3B corresponds to the lower base of the truncated cone shape. The front end surface 3A and the rear end surface 3B are orthogonal to the front-rear direction. The rear end surface 3B is provided with a fitting groove (not shown) into which a protruding portion 4A (described later) of the adjusting mechanism 4 is fitted. The side surface 3C corresponds to a frustoconical side surface. The side surface 3C is provided with a plurality of projections and depressions extending in the front-rear direction. The unevenness prevents the finger from slipping on the operation member 3 when the user applies a force by bringing the finger into contact with the side surface 3C.

The rear end surface 3B fits into a recess 21E provided in the first housing 1021. Since the recess 21E is provided on the left side of the first housing 1021 with respect to the left-right center of the housing 12, the operation member 3 is disposed on the left side of the left-right center of the housing 12. The distance between the front end surface 3A and the rear end surface 3B, that is, the length Lh in the front-rear direction of the operation member 3 is a predetermined length appropriate for the user to touch the side surface 3C to rotate the operation member. (For example, 3 mm). Note that the position in the front-rear direction of the rear end surface 3B is substantially equal to the position in the front-rear direction of the portion of the first surface 21M of the first housing 1021 where the operation member 3 is provided. Therefore, as shown in FIG. 12, the height (= length Lh) of the operation member 3 with respect to the first surface 21M is 3 mm. In the present invention, the length Lh is not limited to 3 mm, and may be a value larger than 3 mm.

As shown in FIG. 12, the diameter Lf of the front end face 3A is smaller than the diameter Lr of the rear end face 3B (see FIG. 15). For this reason, the vertical length of the front end surface 3A at a specific position in the left-right direction of the operating member 3 (hereinafter referred to as “left-right specific position”) is larger than the vertical length of the rear end surface 3B at the specific left-right position. Always shorter. Further, the length in the left-right direction of the front end surface 3A at a specific position in the vertical direction of the operation member 3 (hereinafter referred to as “vertical specific position”) is always greater than the length in the left-right direction of the rear end surface 3B at the specific vertical position. Shorter. In the operation member 3, the angle θ of the side surface 3C with respect to the direction in which the central axis extends (the front-rear direction) is such that the middle finger and the side surface 3C are in a state where the user holds the housing 12 from above and below with the thumb and index finger. The predetermined angle (for example, 40 degrees) is set so as to be parallel to such an extent that the operation is facilitated. In the present disclosure, the angle θ is not limited to 40 degrees, and may be a value smaller than 40 degrees.

<Adjustment mechanism 4>
As shown in FIG. 15, the adjustment mechanism 4 includes a protruding portion 4A and an engaging portion 4B. The engaging portion 4B is a circular plate member. Both surfaces of the engaging portion 4B arranged in parallel face in the front-rear direction. A plurality of concave portions 1041 extending in the front-rear direction are provided on the side surface of the engaging portion 4B. The leaf spring 40 provided inside the housing 12 engages with any of the plurality of recesses 1041. The protruding portion 4A protrudes forward from the vicinity of the circular center of the engaging portion 4B. The protruding portion 4A enters the hole 21D of the first housing 1021 from the rear side and protrudes to the front side of the first surface 21M of the first housing 1021. The front end of the protruding portion 4A that protrudes to the front side of the first surface 21M is fitted into a fitting groove (not shown) on the rear end surface 3B of the operation member 3 (see FIGS. 24 and 25). Accordingly, the operation member 3 and the adjustment mechanism 4 are held by the first housing 1021 of the front housing 13. The adjustment mechanism 4 can rotate integrally with the operation member 3 with an axis extending in the front-rear direction passing through the circular center of the engaging portion 4B as a fulcrum. The adjustment mechanism 4 may be formed integrally with the operation member 3.

In a state where the operation member 3 and the adjustment mechanism 4 are held by the first housing 1021, as shown in FIG. 12, the diameter Lr of the rear end surface 3B (see FIG. 15) is the length of the first surface 21M in the vertical direction. Specifically, it is shorter than the length L1 in the vertical direction between the connection position 212S and the connection position 213S. The upper end of the rear end surface 3B is disposed on the upper end of the first surface 21M, that is, below the connection position 212S, and the lower end of the rear end surface 3B is below the first surface 21M. It is arrange | positioned above the edge part of the side, ie, the connection position 213S.

As shown in FIG. 19, a cam groove 42 is provided on the rear side surface of the engaging portion 4B. The cam groove 42 is formed when a part of the rear side surface of the engaging portion 4B is recessed forward. The cam groove 42 extends in a spiral shape with the circular center X of the engaging portion 4B as a fulcrum. The cam groove 42 is separated from the circular center X as it turns clockwise as viewed from the rear side. Hereinafter, when the shape of the cam groove 42 is described, it is assumed that the cam groove 42 is viewed from the rear side. The cam groove 42 has a first end 42A and a second end 42B. The first end 42A is an end portion in the clockwise direction of the cam groove 42, and the second end 42B is an end portion in the counterclockwise direction. Of the angles formed between the direction 48 extending outward from the circular center X through the first end 42A and the direction 1049 extending outward from the circular center X through the second end 42B, the angle φ on the cam groove 42 side Is 120 degrees. In the present disclosure, the angle φ is not limited to 120 degrees, and may be a value smaller than 120 degrees. The protruding portion 64 of the lens unit 6 is fitted into the cam groove 42 from behind in a state where the operation member 3 and the adjustment mechanism 4 are held by the first housing 1021.

<Deflection unit 59>
The deflection unit 59 includes a half mirror 56 and a holder 5. As shown in FIG. 15, the half mirror 56 is disposed on the left side of the lens unit 6. The position of the half mirror 56 with respect to the housing 12 is fixed by a holder 5 described later. For this reason, the distance from the image unit 7 held at a fixed position with respect to the housing 12 is fixed. The half mirror 56 can reflect image light that has passed through the lens unit 6 and is incident from the right side to the rear side. The user's eyes can visually recognize the virtual image based on the image light reflected to the rear side by the half mirror 56. Moreover, the half mirror 56 can transmit the external light incident from the front side to the rear side.

The half mirror 56 has a rectangular plate shape. The half mirror 56 is configured, for example, by vapor-depositing a metal such as aluminum or silver on a transparent resin or glass substrate so as to have a predetermined reflectance (for example, 50%). The half mirror 56 is held by a holder 5 described later. One surface 56B of both surfaces of the half mirror 56 held by the holder 5 faces diagonally right rearward, and the other surface 56C faces diagonally left frontward. The half mirror 56 can reflect a part (for example, 50%) of light incident on each of the

surfaces

56B and 56C and transmit the other part.

In the present disclosure, instead of the half mirror 56 described above, a reflective member capable of totally reflecting the image light incident on the surface 56B to the rear side may be used. Further, instead of the half mirror 56, an optical path deflecting member such as a prism or a diffraction grating may be used.

The holder 5 is disposed on the left side of the lens unit 6 and holds the half mirror 56. As shown in FIGS. 20 and 21, the holder 5 includes a foundation member 50. The base member 50 has a plate-like first end 51, second end 52, third end 53, and fourth end 54. Of the three parallel planes of the first end 51, each of the pair of planes having the largest area faces in the left-right direction. The upper and lower corners of the front end of the first end 51 are curved. The second end 52 extends rearward from above the rear end of the first end 51. The third end portion 53 extends rearward from the lower side of the rear end portion of the first end portion 51. Of the three parallel planes of the second end portion 52 and the third end portion 53, each of the pair of planes having the largest area faces in the vertical direction. The fourth end portion 54 is constructed between the rear end portions of the second end portion 52 and the third end portion 53. Of the three parallel planes of the fourth end portion 54, each of the pair of planes having the largest area faces the front-rear direction. The length in the left-right direction of the fourth end portion 54 is shorter than the length in the left-right direction of each of the second end portion 52 and the third end portion 53. The positions of the right end surfaces of the first end portion 51, the second end portion 52, the third end portion 53, and the fourth end portion 54 in the left-right direction coincide with each other and form the same plane. A hole 51B is formed in a portion surrounded by the first end portion 51 to the fourth end portion. Hereinafter, as shown in FIG. 21, the right end surfaces of the first end portion 51, the second end portion 52, the third end portion 53, and the fourth end portion 54 are respectively referred to as the first end surface 51A and the first end surface 51A. These are referred to as a second end surface 52A, a third end surface 53A, and a fourth end surface 54A.

As shown in FIG. 20, a hole 52 C penetrating in the vertical direction is provided in the vicinity of the left front corner of the second end portion 52. A hole 53 C penetrating in the vertical direction is provided in the vicinity of the left front corner of the third end portion 53. As shown in FIG. 15, the upper protruding portion 56A protruding upward from the upper end portion of the half mirror 56 is fitted into the hole 52C from below. A lower protruding portion (not shown) protruding downward from the lower end portion of the half mirror 56 is fitted into the hole 53C from above. The holder 5 holds the half mirror 56 by supporting the upper protrusion 56A of the half mirror 56 through the hole 52C and supporting the lower protrusion (not shown) of the half mirror 56 through the hole 53C. The half mirror 56 is disposed on the left side with respect to a plane including each of the first end surface 51A to the fourth end surface 54A.

As shown in FIGS. 20 and 21, a holder protrusion 52 B is provided on the upper surface of the second end 52 that is connected to the fourth end 54. The holder protrusion 52B includes extending

portions

521B and 522B. The extending portion 521B is a plate-like portion that protrudes leftward with respect to the second end surface 52A (see FIG. 21). The length in the left-right direction of the extending portion 521B is the length in the left-right direction between the upper end of the left end 24C of the fourth extending portion 24A and the right end of the rear first regulating member 221B (hereinafter referred to as “the groove portion 221C. It is also referred to as “the length in the left-right direction” (see FIG. 13). The extending portion 522B is a plate-like portion that extends forward from the left end of the extending portion 521B. A holder protrusion 53 B is provided on the lower surface of the portion connected to the fourth end 54 in the third end 53. The holder protrusion 53B includes extending

portions

531B and 532B. The extending portion 531B is a plate-like portion that protrudes leftward with respect to the third end surface 53A. The length in the left-right direction of the extending portion 531B is the length in the left-right direction between the lower end of the left end 24C of the fourth extending portion 24A and the right end of the rear first restriction member 231B (hereinafter referred to as “the groove portion 231C. It is also referred to as “the length in the horizontal direction”. The extending portion 532B is a plate-like portion extending forward from the left end of the extending portion 531B.

As shown in FIG. 21, a first holder engaging portion 541A and second

holder engaging portions

542A and 542B are provided on the fourth end face 54A of the fourth end portion 54. The first holder engaging portion 541A protrudes to the right from the center of the fourth end surface 54A in the up-down direction and from the front side of the front-rear direction center. The second holder engaging portion 542A protrudes to the right from the upper side in the vertical direction of the fourth end face 54A and from the rear side in the front-rear direction. The second holder engagement portion 542B protrudes to the right from the lower side of the fourth end surface 54A and the rear side of the front and rear direction center.

The deflection unit 59 is detachably supported on the housing 12. FIG. 22 shows a state before the deflection unit 59 is attached to the housing 12. The deflection unit 59 has the holder 5 from the rear side with respect to the region covered in the vertical direction by the second extending portion 22A of the second housing 1022 and the third extending portion 1023A of the third housing 1023. By moving to the front side, it is attached to the housing 12. In the process of mounting the deflection unit 59 on the housing 12, the holder protrusion 52B of the holder 5 enters the groove 221C of the second extension 22A from the rear side, and the holder protrusion 53B of the holder 5 extends to the third extension. It enters the groove portion 231C of the exit portion 1023A from the rear side (see FIG. 13). The second end portion 52 of the holder 5 moves in parallel below the second back surface 22B of the second extending portion 22A of the housing 12 along the second back surface 22B. The third end portion 53 of the holder 5 moves in parallel with the third back surface 1023B on the upper side of the third back surface 1023B of the third extending portion 1023A of the housing 12.

In the process in which the deflection unit 59 is mounted on the housing 12, the first holder engaging portion 541 A (see FIG. 21) is moved to the housing engaging portion 241 (see FIG. 13) provided at the left end 24 C of the fourth housing 24. ) From the rear side. When further force is applied to the front side with respect to the holder 5, the fourth end portion 54 bends to the left side, so that the first holder engaging portion 541 A gets over the left side of the housing engaging portion 241 and moves to the housing. It moves to the front side of the body engaging portion 241.

FIG. 23 shows a state in which the deflection unit 59 is mounted on the housing 12. The front end of the first end portion 51 of the holder 5 comes into contact with the vicinity of the left end 21C of the first back surface 21B (see FIG. 22) of the first extension portion 1021A of the first housing 1021 from the rear side. Thereby, the forward movement of the holder 5 is restricted. The holder 5 is disposed in a region covered in the vertical direction by the second extending portion 22A of the second housing 1022 and the third extending portion 1023A of the third housing 1023. The holder 5 holds the half mirror 56 on the left side with respect to the first end face 51A to the fourth end face 54A (see FIG. 21) (see FIG. 15), so that the half mirror 56 is in contact with the first end 51. 1 Arranged on the left side of the back surface 21B.

The left side surface of the second restricting member 211 (see FIG. 22) is in contact with the position including the center in the vertical direction in the first end surface 51A (see FIG. 21) of the first end portion 51 of the holder 5. The front first regulating member 221A (see FIG. 14) is in contact with the upper position of the left end surface of the first end portion 51 of the holder 5. The right side surface of the front first regulating member 231 A comes into contact with the lower position of the left end surface of the first end portion 51 of the holder 5.

The length between the right end of each of the front first restriction members 221 A and 231 A and the left end of the second restriction member 211 is the length (thickness) in the left-right direction of the first end 51 of the holder 5. equal. Therefore, in a state where the deflection unit 59 is mounted on the housing 12, the right end surfaces of the first front regulating members 221 A and 231 A and the left end surface of the second regulating member 211 are in the left-right direction on the front side of the holder 5. Restrict movement.

The extension part 521B of the holder protrusion part 52B (see FIG. 20) fits into the groove part 221C. The right end of the extending portion 521B, that is, the rear end portion of the second end surface 52A is in contact with the upper end portion of the left end 24C of the fourth extending portion 24A constituting the groove portion 221C. The left end of the extending portion 521B is in contact with the right end of the rear first restriction member 221B. The extending part 531B of the holder protruding part 53B fits into the groove part 231C. The right end of the extending portion 531B, that is, the rear end portion of the third end surface 53A is in contact with the lower end portion of the left end 24C of the fourth extending portion 24A constituting the groove portion 231C. The left end of the extending portion 531B is in contact with the right end of the rear first restriction member 231B.

The upper surface of the second end portion 52 of the holder 5 is located below the second back surface 22B (see FIG. 13) of the second extending portion 22A of the housing 12 and the holder protruding portion 52B with respect to the second end portion 52. The upper protrusions are spaced apart from each other. The lower surface of the third end portion 53 (see FIG. 20) of the holder 5 is located above the third back surface 1023B (see FIG. 13) of the third extension portion 1023A of the housing 12, and the third end portion 53. The holder projecting portion 53B is disposed so as to be opposed to each other while being separated by a downward projecting amount.

In addition, the length in the left-right direction of the extending portion 521B is equal to the length in the left-right direction of the groove portion 221C. Further, the length of the extending portion 531B in the left-right direction is equal to the length of the groove portion 231C in the left-right direction. Therefore, the right end of the rear first regulating member 221B and the upper end of the left end 24C of the fourth extending portion 24A in the state where the deflection unit 59 is attached to the housing 12 are the rear of the holder 5. Side to side movement is restricted. When the deflection unit 59 is mounted on the housing 12, the right end of the rear first restriction member 231 B constituting the groove 231 C and the lower end of the left end 24 C of the fourth extension 24 A are Regulate direction movement.

In the state where the deflection unit 59 is mounted on the housing 12, the front side surface of the housing engaging portion 241 (see FIG. 13) contacts the rear side surface of the first holder engaging portion 541A (see FIG. 21). The rear side surface of the housing engaging portion 241 contacts the front side surface of each of the second

holder engaging portions

542A and 542B. Thus, the first holder engaging portion 541A and the second

holder engaging portions

542A and 542B engage with the housing engaging portion 241. Therefore, the movement of the holder 5 in the front-rear direction is restricted by the housing engaging portion 241 and the state where the deflection unit 59 is attached to the housing 12 is maintained.

<Overview of operation (focus adjustment)>
An outline of the operation of the HMD 101 will be described. First, the user wears the wearing tool 8 (see FIG. 10) of the HMD 101 on the head. The user has the main body member 11 with the deflection unit 59 mounted on the housing 12, and adjusts the position so that the half mirror 56 is disposed in front of the left eye.

Output of image data is started from an external device (not shown). The control board 73B (see FIG. 15) receives the image data via the communication line 28 (see FIG. 11). The control board 73B displays an image corresponding to the received image data on the liquid crystal panel 72B. The image light of the image displayed on the liquid crystal panel 72B passes through the glass substrate 1072A and the cylindrical member 71A to the left, and exits from the image unit 7 to the left. The image light emitted from the image unit 7 passes through the plurality of lenses 63 of the lens unit 6 to the left, and exits from the lens unit 6 to the left. The half mirror 56 reflects the image light emitted from the lens unit 6 to the rear side. The image light is incident on the left eye of the user. Further, the half mirror 56 transmits the external light incident from the front side to the rear side. As a result, the user recognizes the main body member 11 of the HMD 101 by superimposing a virtual image on the front scene.

The movement of the lens unit 6 when the user rotates the operation member 3 to adjust the focus will be described. When the adjusting mechanism 4 rotates according to the rotation of the operation member 3, the protruding portion 64 (see FIG. 15) moves along the cam groove 42 (see FIG. 19) of the engaging portion 4B. When the lens unit 6 moves in accordance with the movement of the protrusion 64, the groove 242 restricts the movement of the protrusion 65 (see FIG. 17) in the vertical direction. For this reason, the lens unit 6 moves in the left-right direction in accordance with the rotation of the adjustment mechanism 4. In the following description, the direction of rotation (clockwise or counterclockwise) indicates the direction when the HMD 101 is viewed from the front side, unless otherwise specified.

Referring to FIG. 24, the case where the operation member 3 rotates clockwise will be specifically described as an example. When the adjusting mechanism 4 rotates in response to the rotation of the operation member 3, the pair of parallel wall surfaces extending in the front-rear direction forming the cam groove 42 (see FIG. 19) are on the right side with respect to the projecting portion 64 in contact. A force is applied to move the protrusion 64 to the right. As the protruding portion 64 moves, the lens unit 6 moves to the right side. The cylindrical member 62 (see FIG. 15) of the lens unit 6 enters the cylindrical member 71A of the image unit 7. The protruding portion 621C (see FIG. 18) of the cylindrical member 62 moves to the right along the groove portion 713A of the cylindrical member 71A, and the protruding portion 621D (see FIG. 18) of the cylindrical member 62 is the groove portion 714A (see FIG. 18) of the cylindrical member 71A. 16) to the right. When the protrusion 64 contacts the first end 42A (see FIG. 19) of the cam groove 42, the clockwise rotation of the operation member 3 is restricted. At this time, the right end of the holding member 61 of the lens unit 6 is close to the left end of the cylindrical member 71 A of the image unit 7. The liquid crystal panel 72B (see FIG. 15) of the image unit 7 and the plurality of lenses 63 of the lens unit 6 are closest to each other. Hereinafter, the state of FIG. 15 in which the lens unit 6 and the image unit 7 are closest to each other is referred to as a first state.

Referring to FIG. 25, the case where the operation member 3 is rotated counterclockwise will be specifically described as an example. When the adjusting mechanism 4 rotates according to the rotation of the operation member 3, the pair of parallel wall surfaces extending in the front-rear direction forming the cam groove 42 (see FIG. 19) are on the left side with respect to the projecting portion 64 that comes into contact. A force is applied to move the protrusion 64 to the left. As the protrusion 64 moves, the lens unit 6 moves to the left. The cylindrical member 62 of the lens unit 6 moves to the left outside from the cylindrical member 71A of the image unit 7. The protruding portion 621C of the cylindrical member 62 moves to the left along the groove 713A of the cylindrical member 71A, and the protruding portion 621D of the cylindrical member 62 moves to the left along the groove 714A (see FIG. 16) of the cylindrical member 71A. . When the protrusion 64 comes into contact with the second end 42B of the cam groove 42, the counterclockwise rotation of the operation member 3 is restricted. At this time, the right end of the holding member 61 of the lens unit 6 is separated to the left side with respect to the left end of the cylindrical member 71 A of the image unit 7. The liquid crystal panel 72B (see FIG. 15) of the image unit 7 and the plurality of lenses 63 of the lens unit 6 are farthest away. Hereinafter, the state of FIG. 16 in which the lens unit 6 and the image unit 7 are most separated is referred to as a second state.

When the lens unit 6 moves in the left-right direction, the spread angle of the image light that becomes a virtual image visually recognized by the user is changed by the plurality of lenses 63. Therefore, the user can adjust the focus by rotating the operation member 3. As shown in FIG. 19, since the angle φ formed by the direction 48 and the direction 1049 is 120 degrees, the angle at which the operation member 3 can be rotated is also 120 degrees.

When the lens unit 6 moves in the left-right direction according to the rotation of the operation member 3 and the adjusting mechanism 4, at least a part of each of the cylindrical member 62 and the cylindrical member 71A always overlaps. For this reason, the image light generated by the image unit 7 does not leak out from the image unit 7 and the lens unit 6 even when the lens unit 6 moves in the left-right direction.

In the process in which the adjusting mechanism 4 is rotated, the leaf spring 40 is engaged with one of the plurality of recesses 1041 from the state in which the leaf spring 40 (see FIG. 15) is engaged with one of the plurality of recesses 1041. It changes to the state. The rotation of the adjustment mechanism 4 is suppressed in a state where the leaf spring 40 is engaged with the recess 1041, and the position of the adjustment mechanism 4 is stabilized. For this reason, the user can easily hold the operation member 3 and the adjustment mechanism 4 at desired positions, so that the focus adjustment can be easily performed.

<Effect>
As described above, in the HMD 101, the protruding portion 64 is provided in the curved portion 61A of the lens unit 6, and the protruding portion 65 is provided in the curved portion 61B. The protrusion 65 fits into a groove 242 provided in the fourth housing 24 of the housing 12 and is supported so as to be movable in the left-right direction with respect to the housing 12. The protruding portion 64 fits in the cam groove 42 of the engaging portion 4B of the adjusting mechanism 4 provided at the rear end portion of the operation member 3. When an operation for rotating the operation member 3 is performed, the lens unit 6 moves in the left-right direction. As a result, the relative distance between the lens unit 6 and the image unit 7 in the direction along the optical axis changes, and focus adjustment is performed.

In a state where the HMD 101 is mounted on the user, the projecting

portions

64 and 65, the groove portion 242 and the cam groove 42 are arranged in the front-rear direction with respect to the user, and are not arranged in the vertical direction. For this reason, HMD101 can suppress the magnitude | size of an up-down direction in the state with which the user was mounted | worn. Therefore, the possibility that the user's field of view is blocked by the housing 12 is reduced. Therefore, the HMD 101 can maintain the user's visual field well while being worn by the user.

The housing 12 of the HMD 101 holds the image unit 7 and the half mirror 56, and fixes the distance between them. In the HMD 101, the focus adjustment is performed by moving the lens unit 6 in the left-right direction and changing the distance between the lens unit 6 and the image unit 7 in accordance with an operation on the operation member 3. Since the lens unit 6 does not require external electrical control, a signal line for transmitting an electrical signal is not connected. For this reason, the movement of the lens unit 6 in the left-right direction is not hindered by the signal line. Therefore, the HMD 101 can smoothly move the lens unit 6 in the left-right direction.

In the HMD 101, the protruding portion 65 protrudes backward from the curved portion 61B. The groove portion 242 into which the protruding portion 65 is fitted is provided on the inner side surface of the fourth housing 24. For this reason, HMD101 can suppress appropriately that the housing | casing 12 becomes large by the protrusion part 65 and the groove part 242 to an up-down direction. Therefore, the possibility that the user's field of view is blocked by the housing 12 can be reduced. Moreover, since the groove part 242 extends in a straight line in the left-right direction, the movement of the protruding part 65 in a direction other than the left-right direction can be restricted. Therefore, the HMD 101 can appropriately move the image unit 7 or the lens unit 6 in the left-right direction. Moreover, the shape of the protrusion part 65 is a rod shape, and long in the left-right direction. For this reason, when operation with respect to the operation member 3 is performed, HMD101 can suppress that the lens unit 6 rotates using the axis | shaft extended in the front-back direction as a fulcrum. Accordingly, the HMD 101 can appropriately perform focus adjustment by moving the lens unit 6 in the left-right direction.

Gravity applied to the lens unit 6 when the HMD 101 is attached to the user with the second housing 1022 up and when the HMD 101 is attached to the user with the third housing 1023 up. The direction changes. Here, in the HMD 101, the protruding portion 64 is provided at a position including the vertical center of the curved portion 61 A of the lens unit 6. The protruding portion 65 is provided at a position including the center in the vertical direction of the curved portion 61B of the lens unit 6. The groove portion 242 is provided at the center in the vertical direction of the inner surface of the fourth housing 24 of the housing 12. Therefore, the HMD 101 can keep the lens unit 6 horizontal even when the direction of gravity applied to the lens unit 6 changes.

In the HMD 101, the protruding portion 64 protrudes forward from the curved portion 61A. The engaging portion 4B of the adjustment mechanism 4 having the cam groove 42 into which the protruding portion 64 is fitted is provided on the rear surface of the first housing 1021 of the housing 12. For this reason, it can suppress appropriately that the housing | casing 12 becomes large by the protrusion part 64 and the engaging part 4B of the adjustment mechanism 4 to an up-down direction. Therefore, the possibility that the user's field of view is blocked by the housing can be reduced. Further, the protruding portion 64 fits in the cam groove 42 of the engaging portion 4B and moves in the left-right direction according to the rotation of the operation member 3. Accordingly, since the lens unit 6 can be moved in the left-right direction, the HMD 101 can adjust the focus by changing the distance between the image unit 7 and the lens unit 6.

In the HMD 101, the protruding

portions

621C and 621D of the cylindrical member 62 fit into the

groove portions

713A and 714A of the cylindrical member 71A at the overlapping portion in the left-right direction between the image unit 7 and the lens unit 6. As a result, the positional relationship between the image unit 7 and the lens unit 6 in the direction (front-rear direction and vertical direction) orthogonal to the left-right direction is fixed. Therefore, when the lens unit 6 moves in the left-right direction in response to an operation on the operation member 3, it is possible to suppress movement of at least one of the lens unit 6 and the image unit 7 in a direction intersecting the optical axis 77. Note that the protruding

portions

621C and 621D and the

groove portions

713A and 714A are provided at positions closest to the optical axis 77, respectively. For this reason, the HMD 101 can appropriately suppress the movement of the lens unit 6 and the image unit 7 in the direction intersecting the optical axis 77.

Further, the projecting

portions

621C and 621D are provided on the

planar portions

62C and 62D arranged in the vertical direction of the cylindrical member 62 of the lens unit 6. Further, the

groove portions

713A and 714A are provided in the

flat surface portions

713 and 714 arranged in the vertical direction of the cylindrical member 71A of the image unit 7. For this reason, the positional relationship between the image unit 7 and the lens unit 6 in the direction intersecting the optical axis 77 is fixed on both sides in the vertical direction of the overlapping portions in the horizontal direction. Therefore, when the lens unit 6 moves in the left-right direction according to the operation on the operation member 3, it is possible to appropriately suppress the lens unit 6 and the image unit 7 from moving in the direction intersecting the optical axis 77.

Further, the protrusion 621C is provided at the center in the front-rear direction of the flat part 62C, and the protrusion 621D is provided at the center in the front-rear direction of the flat part 62D. The groove portion 713A is provided at the center in the front-rear direction of the plane portion 713, and the groove portion 714A is provided at the center in the front-rear direction of the plane portion 714. In this case, when the lens unit 6 moves in the left-right direction in accordance with an operation on the operation member 3, it is possible to appropriately suppress the lens unit 6 and the image unit 7 from moving in the front-rear direction.

In the HMD 101, the lens unit 6 and the image unit 7 are held in the rear housing 14 that is arranged close to the user side. The operation member 3 and the adjustment mechanism 4 are held in the front housing 13 that is disposed apart from the user side. The HMD 101 is worn by the user when the wearing tool 8 is worn on the user's head and the connecting tool 9 is connected to the rear housing 14 to support the entire housing 12. Therefore, since the lens unit 6 and the image unit 7 are held by the rear casing 14 directly connected to the connection tool 9, the lens unit 6 and the image unit 7 can be appropriately fixed to the user's head. .

The image unit 7 has a protrusion 712 (712A to 712C). The front ends of the protrusions 712 are arranged on the same plane. In this case, it becomes easy to easily place the image unit 7 on a stand or the like using the protruding portion 712 as a base. For this reason, when the image unit 7 is assembled to the housing 12 and the HMD 101 is manufactured, the image unit 7 can be stabilized. Thereby, manufacture of HMD101 can be facilitated.

The mounting tool 8 of the HMD 101 has a first portion 8A that extends in the left-right direction and is curved in a convex shape toward the front, and

second portions

8B and 8C that extend rearward from both sides of the first portion 8A. Further, the HMD 101 has a connection tool 9 extending from the first portion 8A of the mounting tool 8. The main body member 11 is connected to the tip of the connection tool 9. Therefore, the half mirror 56 can be held in front of the user's eyes with the wearing tool 8 worn on the user's head. Therefore, the user can work using both hands while visually recognizing the image light deflected by the half mirror 56.

In the HMD 101, focus adjustment may be performed by moving the image unit 7 in the left-right direction. Specifically, it is as follows. The lens unit 6 may be fixedly held on the housing 12 and the image unit 7 may be held movably in the left-right direction. Projections may be provided on each of the front and rear surfaces of the image unit 7. A protrusion on the front side of the image unit 7 may be fitted into the cam groove 42 of the adjustment mechanism 4 from the rear. The protruding portion on the rear side of the image unit 7 may be fitted from the front into the groove portion 242 on the front surface of the fourth housing 24. When the operation member 3 and the adjustment mechanism 4 rotate, the image unit 7 may move in the left-right direction. In addition, protrusions may be provided on the front and rear surfaces of both the image unit 7 and the lens unit 6. Focus adjustment may be performed by moving the image unit 7 and the lens unit 6 in the left-right direction. The housing 12 may cover only a part of the lens unit 6 and the image unit 7.

The protrusion 65 of the lens unit 6 may be cylindrical. The position where the protruding portion 65 is provided is not limited to the position including the center in the vertical direction of the curved portion 61B of the lens unit 6, and may be above or below the center. Instead of the protruding portion 65 of the lens unit 6, a groove portion extending in the left-right direction and recessed forward may be provided. Instead of the groove portion 242 of the fourth housing 24, a protruding portion that protrudes forward may be provided. Then, the lens unit 6 may be movable in the left-right direction by fitting the protrusion of the fourth housing 24 into the groove of the lens unit 6 and moving the protrusion in the left-right direction along the groove.

Instead of the projecting portion 64 of the lens unit 6, a rack gear extending in the left-right direction may be provided. Instead of the cam groove 42 of the adjustment mechanism 4, a pinion gear that fits into the rack gear may be provided. The pinion gear may be rotated according to the rotation of the operation member 3, and the focus adjustment may be performed by moving the rack gear fitted to the pinion gear in the left-right direction.

The operation member 3 and the adjustment mechanism 4 may have an integral structure. The protruding portion 64 of the lens unit 6 may protrude to the front side of the first housing 1021 through a slit provided in the first housing 1021 of the housing 12. A cam groove 42 may be provided on the rear end surface 3 B of the operation member 3. The protruding portion 64 protruding to the front side of the first housing 1021 may be fitted in the cam groove 42 of the operation member 3. The lens unit 6 may move in the left-right direction by the protrusion 64 moving in the left-right direction along the slit according to the rotation of the operation member 3.

In the HMD 101 described above, the image unit 7 may be provided with

groove portions

713A and 714A on the front side or the rear side of the

plane portion

713 and 714 with respect to the center in the front-rear direction. The lens unit 6 may be provided with

protrusions

621C and 621D that fit into the

grooves

713A and 714A of the image unit 7 on the

flat surfaces

62C and 62D, respectively. The image unit 7 may be provided with a groove portion in any one of the

plane portions

713 and 714. The lens unit 6 may be provided with a protruding portion that fits into the groove portion of the image unit 7 in any one of the

plane portions

62C and 62D. In the image unit 7, two or more groove portions may be provided in each of the

plane portions

713 and 714. The lens unit 6 may be provided with two or more projecting portions that fit into two or more groove portions of the image unit 7 in each of the

planar portions

62C and 62D. The image unit 7 may be provided with a groove in the curved portion 715. The lens unit 6 may be provided with a protrusion that fits in the groove of the image unit 7 in the curved portion 62A. You may open | release the upper end of the groove part 713A provided in the

plane parts

713 and 714 of the image unit 7, and the lower end of the groove part 714A. That is, the

groove portions

713A and 714A may have a slit shape. Projections may be provided on the

plane portions

713 and 714 of the image unit 7. Groove portions that fit into the protruding portions of the

flat portions

713 and 714 of the image unit 7 may be provided in the

flat portions

62C and 62D of the lens unit 6. The image unit 7 may be held by the front housing 13. The side plate member 71 B of the image unit 7 may be provided with a column or prism that protrudes forward instead of the protruding portion 712.

In the above description, the HMD 101 may be configured only with the main body member 11 without including the mounting tool 8 and the connection tool 9. The body member 11 may be directly fixed to glasses or the like. Further, the HMD 101 may be configured by the connection tool 9 and the main body member 11 without including the mounting tool 8.

With reference to FIG. 27, the main body member 11A of the HMD 101 in the modification of the present disclosure will be described. The main body member 11A is different from the main body member 11 (see FIG. 11 and the like) in that the operation member 3 is changed to the operation member 1030, and the other parts are the same. Hereinafter, only the operation member 1030 will be described, and description of other parts will be omitted.

In the main body member 11 A, the operation member 1030 includes a first member 36 and a second member 1037. The first member 36 projects forward from the recess 21E of the first surface 21M of the first housing 1021. The first member 36 is cylindrical. The central axis of the first member 36 is parallel to the front-rear direction. The second member 1037 is provided on the front end surface 36 A of the first member 36. The second member 1037 has a rod shape with a rectangular cross section. The second member 1037 extends in a direction (vertical direction in FIG. 27) orthogonal to the front-rear direction. The length of the second member 1037 is larger than the diameter of the front end face 36 A of the first member 36. One end portion 1037 A and the other end portion 1037 B of the second member 1037 protrude outward from the side surface of the first member 36.

A fitting groove (not shown) into which the protruding portion 4A (see FIG. 15) of the adjusting mechanism 4 is fitted is provided on the rear end surface of the first member 36. The operation member 1030 and the adjustment mechanism 4 are held by the first housing 1021 in a state where the protrusion 4A is fitted in the fitting groove. The operation member 1030 and the adjustment mechanism 4 can rotate together with the central axis of the operation member 1030 as a fulcrum.

In the above case, when the user wears the wearing tool 8 and arranges the half mirror 56 in front of the left eye (right-side eye), the user can end the second member 1037 of the operation member 1030. It is possible to easily apply force to the portion 1037A with the middle finger 86. Therefore, the user can easily rotate the operation member 1030.

Suppose that the user places the half mirror 56 in front of the right eye (the left eye toward the left) as an example. In this case, the user arranges the second surface 22M of the second housing 1022 on the lower side so that the field of view of the left eye of the user is not blocked by the main body member 11, and the third surface of the third housing 1023 The main body member 11 is used in a state in which the surface 23M is disposed on the upper side (that is, a state in which the vertical direction is inverted with respect to FIG. 10). An end portion 1037 A of the second member 1037 protrudes downward with respect to the first member 36, and an end portion 1037 B protrudes upward with respect to the first member 36. In this case, the user can easily apply a force to the end portion 1037B with the middle finger 86, so that the operation member 1030 can be easily rotated. As described above, the operation member 1030 is used in a state in which the vertical direction of the main body member 11 is inverted, that is, in a state where the half mirror 56 is disposed in front of the user's left eye (right eye toward the user). Even in such a case, the user can easily adjust the focus.

In addition, this indication is not limited to said embodiment and modification, Various deformation | transformation are possible. In the HMD 101 described above, focus adjustment may be performed by moving the image unit 7 in the left-right direction. Specifically, it is as follows. The image unit 7 may be held so as to be movable in the left-right direction. A protrusion may be provided on the front surface of the image unit 7. The protruding portion of the image unit 7 may be fitted into the cam groove 42 of the adjustment mechanism 4 from the rear. When the

operation members

3 and 30 and the adjustment mechanism 4 rotate, the image unit 7 may move in the left-right direction. Further, focus adjustment may be performed by moving both the image unit 7 and the lens unit 6 in the left-right direction.

The housing 12 may cover only a part of the lens unit 6 and the image unit 7. An angle θ between the side surface of the truncated cone shape of the operation member 3 and the front-rear direction may be larger than 40 degrees. The shape of the operation member 3 may be a shape other than the truncated cone shape. For example, the operation member 3 may have a truncated pyramid shape, or may be a cylinder or a prism. The rotatable angle φ of the operation member 3 may be greater than 120 degrees. The length Lh (height) of the operation member 3 in the front-rear direction may be less than 3 mm. The portion where the first surface 21M and the second surface 22M of the housing 12 are connected and the portion where the first surface 21M and the third surface 23M are connected may be angular. The distance between the second surface 22M and the third surface 23M may be uniform. That is, the second surface 22M and the third surface 23M may be parallel. The housing 12 may be substantially cylindrical with the left-right direction as the axial direction.

The left end 21C of the first housing 1021 was recessed rightward from the both ends in the vertical direction toward the center in the vertical direction. Here, a transparent member may be provided in the recessed portion. In this case, the left-right position of the left end 22C of the second extension part 22A and the left end 23C of the third extension part 1023A may be the same as the left-right position of the left end of the transparent member.

In the above, the second member 1037 of the operation member 1030 may be a rod-shaped member extending in one direction from the center of the front end surface 36A of the first member 36. Further, the second member 1037 may be a plurality of rod-like members extending in three or more directions from the center of the front end surface 36A of the first member 36. The extending direction of the second member 1037 may be inclined with respect to the direction orthogonal to the front-rear direction. The second member 1037 of the operation member 1030 may protrude from the side surface of the first member 36.

<Appendix>
The present disclosure also has the following viewpoints.

Conventionally, a head-mounted display capable of adjusting the focus is known. For example, a conventional HMD includes an eyepiece optical system, a liquid crystal display device, a control board, and a connection member. The eyepiece optical system, the liquid crystal display device, and the control board are provided along the optical axis direction. The liquid crystal display device is provided between the eyepiece optical system and the control board, and emits light of an image to be visually recognized by the user toward the eyepiece optical system. The liquid crystal display device is movable relative to the eyepiece optical system and the control board. The control board controls the liquid crystal display device. The connecting member is a bendable member such as a conductive wire, and electrically connects the control board and the liquid crystal display device. The relative position of the liquid crystal display device and the eyepiece optical system changes as the liquid crystal display device moves relative to the eyepiece optical system. Thereby, the head mounted display performs focus adjustment.

In the conventional HMD, the arrangement position of the connection member with respect to the liquid crystal display device changes with the relative movement of the liquid crystal display device. In this case, the liquid crystal display device may be subjected to a load that hinders relative movement due to deformation of the connection member. As a result, the liquid crystal display device is inclined with respect to the optical axis direction, and there is a possibility that an image that is visually recognized by the user is deformed.

The present disclosure further provides a head mounted display in which an image to be visually recognized by the user is not easily deformed even when focus adjustment is performed.

(1) Still another aspect of the present disclosure is as follows:
An image light generator capable of generating image light;
An eyepiece optical system that includes a plurality of lenses that guide the image light generated by the image light generation unit in a first direction, and is provided apart from the image light generation unit in the first direction;
The image light that is spaced apart from the eyepiece optical system in the first direction and that is provided on the opposite side of the image light generation unit with respect to the eyepiece optical system and that is guided by a plurality of lenses is different from the first direction. A reflective member that reflects in two directions;
The image light generating unit and the reflecting member are fixedly supported, and the eyepiece optical system is supported to be reciprocally movable along the first direction with respect to the fixed image light generating unit and the reflecting member. A member,
An image display device comprising: a moving mechanism that reciprocates the eyepiece optical system along the first direction.

According to the present disclosure, when performing the focus adjustment, the image display device moves the eyepiece optical system relative to the reflecting member and the image light generation unit along the first direction. In this case, the image light generator is not fixed to the first direction because it remains fixed to the support member. Therefore, the image display apparatus can make it difficult to deform the image that is visually recognized by the user even when the focus adjustment is performed.

(2) Also,
The support member includes a pair of guide portions that are provided apart from each other in the third direction intersecting the first direction and the second direction, and guide the eyepiece optical system along the first direction.
The eyepiece optical system may include a pair of sliding portions that slide along each of the pair of guide portions.

Since the eyepiece optical system moves along the pair of guide portions, it is easy to reciprocate and hardly tilt in the first direction. Therefore, the image display apparatus can make it difficult to deform the image visually recognized by the user when performing the focus adjustment.

(3) Also,
The support member includes a first groove portion provided at a position including a center in a third direction intersecting the first direction and the second direction, and extending along the first direction;
The eyepiece optical system may include a protrusion provided at a position including the center in the third direction, extending along the first direction, and engageable with the first groove.

Since the eyepiece optical system moves along the groove, it is easy to reciprocate. Moreover, since the 1st groove part and the protrusion part are extended in the 1st direction, an eyepiece optical system cannot tilt easily in the 1st direction. Therefore, the image display apparatus can further reduce the deformation of the image to be visually recognized by the user when performing the focus adjustment.

(4) Also,
The support member is
A first support member that supports the reflective member;
A second support member that supports the image light generation unit and the eyepiece optical system;
A fixing portion for fixing the first support member and the second support member;
One of the first support member and the second support member is disposed on the direction side where the reflection member reflects the image light with respect to the other,
The fixing portion may be disposed on the reflecting direction side of the support member.

The fixed portion arranged on the reflecting direction side of the support member is difficult to be seen by anyone other than the user when using the image display device. Therefore, the image display device can improve the appearance of the appearance.

(5) Also,
One of the pair of guide portions includes a shaft member provided on the first support member and extending along the first direction,
The other protrudes from the first support member in a direction intersecting the first direction, and includes a protrusion extending along the first direction.
One of the pair of sliding portions includes one or a plurality of holes into which the shaft member is inserted,
The other may have a groove that fits into the protrusion.

The eyepiece optical system can reciprocate along the first direction simply by inserting the shaft member into the hole and fitting the protrusion into the groove. Therefore, the image display device can improve assemblability.

(6) Also,
One of the pair of sliding portions includes a plurality of the hole portions spaced apart in the first direction,
The groove may be arranged at a position between any of the plurality of holes in the first direction.

The groove can stably prevent the eyepiece optical system from rotating around the axis of the hole. Therefore, the image display device can stably move the eyepiece optical system back and forth.

(7) Also,
The moving mechanism is
A protrusion provided in the eyepiece optical system and protruding in a direction opposite to a direction in which the reflection member reflects the image light;
The protrusion has a cam groove that is inserted from the reflecting direction side, and a rotation member that is rotatably provided on the support member;
The cam groove extends spirally around the axis of the rotating member,
One end side in the extending direction of the cam groove may be further away from the axis than the other end side.

When the rotating member rotates, the eye groove optical system can reciprocate by the cam groove reciprocating the protrusion along the first direction. The user can reciprocate the eyepiece optical system simply by rotating the rotating member. Therefore, the image display apparatus can improve the operability of focus adjustment.

(8) Also,
The cam groove has an angle on the cam groove side of 90 degrees or more and 180 degrees among angles formed by the plane including the one end and the axis in the extending direction and the plane including the other end and the axis. You may form so that it may become the following.

When the eyepiece optical system moves from one end to the other end in the first direction in the movable range, the rotating member rotates in the range of 90 degrees or more and 180 degrees or less. Since the rotation member can be rotated 90 degrees or more, the movement amount of the eyepiece optical system that moves per unit rotation amount of the rotation member is suppressed. Therefore, the user can finely adjust the moving amount of the eyepiece optical system by rotating the rotating member. Further, the rotating member does not rotate more than 180 degrees. Therefore, the user does not need to change the rotating member pinched with the finger when rotating the rotating member. Therefore, the HMD can further improve the focus adjustment operability.

(9) Also,
The reflecting member includes a first region capable of reflecting the image light on a surface on the eyepiece optical system side,
The first region may include a second region in which the eyepiece optical system moved to a position closest to the reflecting member can irradiate the surface with the image light.

The region where the eyepiece optical system can irradiate the surface of the reflecting member is the largest when the eyepiece optical system is closest to the reflecting member. Since the first region includes the second region, the image light irradiated on the surface does not deviate from the first region regardless of the position of the eyepiece optical system. Therefore, the image display device can make the user visually recognize the image light image stably regardless of the position of the eyepiece optical system.

(10) Also,
The image light generation unit and the eyepiece optical system are separated from the first state in which the relative distance in the first direction between the image light generation unit and the eyepiece optical system is closest to each other, and the relative distance is the farthest. Held in the housing movably between the second state,
The one end portion in the first direction of the image light generation unit is the one side in the first direction in the first state than the other end portion in the first direction of the eyepiece optical system. Placed in
In the first state, the eyepiece optical system is an overlapping portion of the eyepiece optical system disposed on the other side in the first direction with respect to the end portion on the one side in the first direction of the image light generation unit. Of the eyepiece optical system, the portion closest to the optical axis of the eyepiece optical system has at least one additional protrusion protruding in the direction intersecting the optical axis,
In the first state, the image light generation unit is an overlapping portion of the eyepiece optical system that is disposed on the one side in the first direction with respect to an end portion on the other side in the first direction of the eyepiece optical system. Of these, at least one additional groove portion into which the at least one additional protrusion fits from the inside may be provided in a portion closest to the optical axis.

In this case, the positional relationship in the direction intersecting with the third direction is fixed by fitting at least one additional protrusion in at least one additional groove at the overlapping portion in the first direction between the image light generation unit and the eyepiece optical system. Is done. Therefore, when at least one of the image light generation unit and the eyepiece optical system moves in the first direction according to an operation on the operation member, the image light generation unit and the eyepiece optical system move in a direction intersecting the optical axis. Can be suppressed. The at least one additional protrusion and the at least one additional groove are provided at positions close to the optical axis, so that the image light generation unit and the eyepiece optical system are appropriately prevented from moving in a direction intersecting the optical axis. it can.

(11) Also,
The at least one additional protrusion has a pair of third protrusions provided on each of one side and the other side in a direction orthogonal to the optical axis of the overlapping portion of the eyepiece optical system,
The at least one additional groove may include a pair of additional grooves provided on one side and the other side of the overlapping portion of the image light generation unit in a direction orthogonal to the optical axis.

In this case, in the image light generation unit and the eyepiece optical system, the positional relationship in the direction intersecting the third direction is fixed on both sides of the overlapping portion in the first direction in the direction orthogonal to the first direction. Therefore, when at least one of the image light generation unit and the eyepiece optical system moves in the first direction according to an operation on the operation member, the image light generation unit and the eyepiece optical system move in a direction intersecting the optical axis. It can be suppressed appropriately.

(12) Also,
The at least one additional protrusion is provided at a position including the center in the second direction of the eyepiece optical system,
The at least one additional groove may be provided at a position including the center in the second direction of the image light generation unit.

In this case, when at least one of the image light generation unit and the eyepiece optical system moves in the first direction in accordance with an operation on the operation member, it is appropriate that the image light generation unit and the eyepiece optical system move in the second direction. Can be suppressed.

(13) Still another aspect of the present disclosure is as follows:
The image display device according to any one of the above (1) to (12);
A wearing tool having a first portion extending in the first direction and a pair of second portions extending from both sides of the first portion to the one side in the second direction;
A head mounted display comprising: a connection tool connected to the first portion of the wearing tool and connected to the image display device.

(14) Also,
The first portion is curved in a convex shape toward the other side in the second direction,
The connector extends from the first portion along the third direction;
One end of the connection tool is connected to the wearing tool,
The image display device may be connected to the other end of the connector.

1,101 HMD
3: Operation member 4: Adjustment mechanism 5: Holder 6: Lens unit 7: Image unit 8: Mounting tool 8A: 1st part 8B: 2nd part 8C: 2nd part 9: Connection tool 10 Case 20 1st case 12: Housing 21C: Left end 21M: First surface 22C: Left end 22M: Second surface 23C: Left end 23M: Third surface 30 Second housing 34A Screw 35 A pair of guide portions 37 Shaft member 39 Projecting portion 42: Cam groove 56: Half mirror 59: Deflection unit 63: Lens 64: Protruding portion 65: Protruding portion 70 Adjuster 76 Cam groove 77:

Optical axis

78, 79 Plane 80 Half mirror 89 Reflecting surface 84 Maximum irradiation area 120 Liquid crystal unit 130 Eyepiece optical system 136 Protruding portion 144 Hole portion 145 Groove portion 146 Sliding portion 212: Curved portion 2 3: curved portion 242: groove 621C: protrusion 621D: protrusion 712: protrusion 713A: groove 714A: groove 1030: operating member 1036: first member 1037: second member X axis theta: angle phi: angle

Claims

An image unit capable of generating image light;
A lens unit having a plurality of lenses, disposed on one side in the first direction with respect to the image unit, and having an optical axis extending in the first direction;
A housing covering at least a part of the image unit and the lens unit;
Of the housing, a member provided on the one side in the first direction with respect to the lens unit, wherein the image light guided by the lens unit is secondly orthogonal to the first direction. A deflecting member capable of deflecting to one side of the direction;
A first engagement member provided on the one side in the second direction of at least one of the image unit and the lens unit;
A second engagement member provided on the other side in the second direction of at least one of the image unit and the lens unit;
Of the casing, a member provided on the inner side surface of the one side portion in the second direction, which is engaged with the first engaging member and supported so as to be movable in the first direction. A third engaging member that
A second engagement member that engages with the second engagement member, the fourth engagement member being capable of changing a relative distance between the image unit and the lens unit in the first direction; An adjustment mechanism provided on the other side of the second direction of
A member provided at least on the other side of the housing in the second direction, the operation member being connected to the adjustment mechanism and capable of operating the adjustment mechanism by a user. An image display device.
The housing holds a fixed distance between the image unit and the deflection member,
The image display apparatus according to claim 1, wherein the first engagement member and the second engagement member are provided in the lens unit and are not provided in the image unit.
2. The image display device according to claim 1, wherein the first engaging member has a first projecting portion projecting to the one side in the second direction.
4. The image display device according to claim 3, wherein a length of the first projecting portion in the first direction is longer than a length in a third direction orthogonal to the first direction and the second direction.
4. The image display device according to claim 3, wherein the third engagement member has a first groove portion extending in the first direction and into which the first protrusion is fitted.
4. The image display device according to claim 3, wherein the third engagement member includes a shaft member that extends in the first direction and is inserted through the first protrusion.
The first projecting portion is provided at a position including the center in the third direction among the one side in the second direction of at least one of the image unit and the lens unit,
The second engagement member is provided at a position including a center in the third direction among the other side in the second direction of at least one of the image unit and the lens unit,
The said 3rd engagement member is provided in the position containing the center of the said 3rd direction among the inner surface of the said housing | casing of the said one side part of the said 2nd direction of the said housing | casing. The image display device described in 1.
The first protrusion has two sliding portions provided apart from each other in the third direction among the one side in the second direction of at least one of the image unit and the lens unit,
Two third engagement members are provided corresponding to the two sliding portions,
The said 3rd engagement member is provided in the position containing the center of the said 3rd direction among the inner surface of the said housing | casing of the said one side part of the said 2nd direction of the said housing | casing. The image display device described in 1.
The second engaging member has a second projecting portion projecting to the other side in the second direction of at least one of the image unit and the lens unit,
The image display device according to claim 1, wherein the fourth engagement member has a spiral second groove portion into which the second protrusion is fitted.
The image unit and the lens unit include a first state in which the relative distance in the first direction between the image unit and the lens unit is the closest, and a second state in which the relative distance is the most separated. Held in the housing movably between,
The one end of the image unit in the first direction is closer to the one side in the first direction than the other end of the lens unit in the first direction in the first state. Arranged,
In the first state, the lens unit has the optical axis in the overlapping portion of the lens unit disposed on the other side in the first direction with respect to the end on the one side in the first direction of the image unit. At least one third projecting portion projecting in a direction intersecting the optical axis,
In the first state, the image unit has the optical axis in the overlapping portion of the image unit arranged on the one side in the first direction with respect to the end on the other side in the first direction of the lens unit. 9. The image display device according to claim 1, further comprising at least one third groove portion into which the at least one third projecting portion is fitted from an inner side in a portion closest to the image display device.
The at least one third protrusion has a pair of third protrusions provided on each of one side and the other side of the lens unit overlapping portion in a direction orthogonal to the optical axis,
The said at least 1 3rd groove part has a pair of 3rd groove part provided in each of the one side and the other side of the direction orthogonal to the said optical axis of the said image unit duplication part, It is characterized by the above-mentioned. The image display device described in 1.
The at least one third protrusion is provided at a position including the center of the lens unit in the second direction,
The image display device according to claim 10, wherein the at least one third groove portion is provided at a position including a center of the image unit in the second direction.
The housing has a first housing on the one side in the second direction, and a second housing on the other side in the second direction,
The image display apparatus according to claim 1, wherein the image unit and the lens unit are held by the first casing, and the operation member is held by the second casing.
The image according to any one of claims 1 to 8, further comprising a plane portion including a plurality of end portions arranged on the same plane on the other side of the second direction in the image unit. Display device.
The image display device according to any one of claims 1 to 14,
A wearing tool having a first portion extending in the first direction and a pair of second portions extending from both sides of the first portion to the one side in the second direction;
A connection tool connected to the first part of the wearing tool and connected to the image display device;
A head-mounted display characterized by comprising:
The first portion is curved in a convex shape toward the other side in the second direction,
The connector extends from the first portion along the third direction;
One end of the connection tool is connected to the wearing tool,
The other end of the connection tool is connected to the image display device,
The head mounted display according to claim 15.