JP6248854B2 - Head mounted display - Google Patents

Description

The present invention relates to be worn on the head of the user Ruhe head-mounted display.

  Conventionally, a head-mounted display (hereinafter referred to as “HMD”) capable of performing focus adjustment is known. Patent Document 1 discloses a monocular HMD that presents an image to one eye of a user. In the HMD, the optical axis of image light (hereinafter referred to as “image light”) displayed on the liquid crystal in the housing extends in the same direction as the longitudinal direction of the housing (hereinafter referred to as “left-right direction”). 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 a f head mounted display that can focus adjustment while reducing the size increase of the vertical direction of the casing.

Head-mounted display according to the present onset Ming, an image unit capable of generating image light includes a plurality of lenses, the relative image unit disposed on one side of the first direction, the said optical axis first A lens unit extending in a direction, and a housing covering at least a part of the image unit and the lens unit , the first housing on one side in a second direction orthogonal to the first direction, A second housing is provided on the other side in two directions, the first housing holds the position of the image unit relative to the housing, and the position of the lens unit relative to the housing is A housing that is movably held in a first direction, and a member that is provided on the one side in the first direction with respect to the lens unit of the housing, and is guided by the lens unit Image light before A deflecting member which can be deflected to the one side in the second direction, is provided on the one side of the second direction before Symbol lens unit, the first protrusion protruding in the one side of the second direction a first engagement member having a part, provided on the other side of the second direction before Symbol lens unit, the second engagement having a second protrusion cylindrical projecting to the other side of the second direction Of the first member and the first member, a joint member is a member provided on the inner surface of the one side portion in the second direction, and extends in the first direction and fits the first protrusion. A third engagement member having a first groove portion and engaged with the first engagement member and movably supported in the first direction; and the other side of the second engagement member in the second direction. a regulation mechanism provided in a member which engages with the second engagement member, wherein the image unit and the front Said first direction of relative distance between the lens unit and a fourth engagement member can be changed, the fourth engagement member includes a regulating mechanism having a spiral-shaped second groove in which the second protrusion is fitted A member of the housing that is held by the second housing and is connected to the adjustment mechanism and extends to the first direction and the operation member that is operable by the user to operate the adjustment mechanism and the second direction. A mounting portion having a first portion that curves in a convex shape toward the other side, and a pair of second portions extending from both sides of the first portion to the one side in the second direction, and A connection tool extending from the first portion and having the first housing connected to a tip thereof, and the length of the first protrusion in the first direction is orthogonal to the first direction and the second direction. It is longer than the length in the third direction .

In the head mount display, a first engagement member of Les Nzuyuni' bets is provided on one side in the second direction, 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 first 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 head mounted display 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 head-mounted display can suppress the size in the vertical direction while being worn by the user. Therefore, the head mounted display can reduce an increase in the vertical size of the housing while allowing the user to adjust the focus.
Further, the lens unit is moved in the first direction by the adjusting mechanism in response to an 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. Therefore, the head mounted display can smoothly move the lens unit in the left-right direction.
Further, the head mounted display can prevent the lens unit from rotating about the axis extending in the second direction when the operation member is operated. Therefore, the head mounted display can appropriately perform focus adjustment by moving the lens unit in the first direction.
Moreover, it can suppress appropriately that a housing | casing becomes large in a 3rd direction with a 2nd engagement member and a 4th engagement member. Further, the lens unit can be moved in the first direction by moving the second protrusion along the second groove in accordance with the operation of rotating the operation member, and the relative distance between the two can be changed.
In addition, a case where the head mounted display 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 is taken as an example. 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 head mounted display 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.

In the present invention , the casing may hold the distance between the image unit and the deflection member fixed.

In the present invention, the first protrusion of the front Symbol the one side of the second direction before Symbol lens unit, provided at a position including the center of the third direction, the second engagement member, before of the other side of the front Stories second direction serial lens unit, provided at a position including the center of the third direction, the third engagement member, said one of the second direction of the first body It may be provided at a position including the center in the third direction on the inner side surface of the casing of the side portion. When the head mounted display is attached to the user with one side in the third direction up, and when the head mounted display is attached to the user with the other side in the third direction up, the image unit and The direction of gravity applied to the lens unit changes. On the other hand, the head mounted display 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 changes.

In the present invention, before Symbol lens unit has a first state in which the relative distance of the first direction is closest between said image unit and the lens unit, a second state in which the relative distance is farthest The one end of the image unit in the first direction is movably held between the first side of the lens unit and the other side of the lens unit in the first direction. The lens unit is disposed on the one side in the first direction from the end of the image unit, and the lens unit is in the first direction than the end on the one side in the first direction of the image unit in the first state. The lens unit overlapping portion disposed on the other side of the lens unit has at least one third projecting portion projecting in a direction intersecting the optical axis at a portion closest to the optical axis, and the image unit is The first In the aspect, among the overlapping portions of the image unit arranged on the one side in the first direction than the end on the other side in the first direction of the lens unit, the portion closest to the optical axis, You may have at least 1 3rd groove part which at least 1 3rd protrusion part fits from an inner side. 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 the LES Nzuyuni' bets in response to the operation on the operation member is moved in the first direction, can be suppressed from moving in a direction lenses unit intersects with the optical axis. At least one third projection and at least one third groove, so provided at a position close to the optical axis, can be appropriately prevented from moving in a direction lenses unit intersects with the optical axis.

In the present invention , the at least one third projecting portion has a pair of third projecting portions 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 the LES Nzuyuni' bets in response to the operation on the operation member is moved in the first direction, can be properly restrained from moving in a direction lenses unit intersects with the optical axis.

In the present invention , the at least one third protrusion is provided at a position including the center of the lens unit in the second direction, and the at least one third groove is the center of the image unit in the second direction. It may be provided in the position containing. In this case, when the record Nzuyuni' bets in response to the operation on the operation member is moved in the first direction can be appropriately suppress the lenses unit moves in the second direction.

In the present invention , 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, it becomes easy to easily place the image unit on a table or the like using the flat surface portion as a base. For this reason, when a head mounted display is manufactured by assembling the image unit to the housing, the image unit can be stabilized. Thereby, manufacture of a head mounted display can be facilitated.

It is a perspective view of HMD1. 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.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a head mounted display (hereinafter referred to as “HMD”) 1 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 HMD1 is a virtual image projection type. The half mirror 56 reflects the light of the image displayed on the liquid crystal panel 72 </ b> B (see FIG. 6, described later) toward one eye of the user. The HMD 1 can allow the user to recognize an image superimposed on the scene in front of him. The HMD 1 includes a main body member 11, an attachment 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 1 are defined. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the HMD 1 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, the lower side, the left side, the right side, the front side, and the rear side of the HMD 1 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.

  The connection tool 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. 1, 2, and 3, 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. 6), 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. 1, 2, and 4, the housing 12 includes a main body portion 12 </ b> A and a protruding portion 12 </ b> B. 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 referred to as a first casing 21, a second casing 22, a third casing 23 (see FIG. 1), and a fourth casing 24 ( 4) and the fifth casing 25 (see FIG. 1). The front surface of the first housing 21, the upper surface of the second housing 22, the lower surface of the third housing 23, 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. 4), and a fifth surface 25M (see FIG. 1), 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 FIG. 1 and FIG. 2, 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. 1, 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, the 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. 3). 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 21 and the second housing 22 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. 3). 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 21 and the third housing 23 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 21 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 22 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 23 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. 2, the left end 21 </ b> C of the first housing 21 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 21 </ b> C is arranged on the right side of the leftmost positions of the left end 22 </ b> C of the second casing 22 and the left end 23 </ b> C of the third casing 23. As shown in FIG. 4, 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 21, the second housing 22, the third housing 23, and the fourth housing 24, the portions on the left side of the lens unit 6 (see FIG. 6) described later are respectively The first extending portion 21A, the second extending portion 22A, the third extending portion 23A, and the fourth extending portion 24A are referred to as “first extending portion 21A, second extending portion 22A, third extending portion 23A, and fourth extending portion 24A”. The first extending portion 21A 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 23A 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 21A is connected to the front side of the second extension part 22A. The lower side of the first extension part 21A is connected to the front side of the third extension part 23A. The rear surface of the first extension portion 21A, the lower surface of the second extension portion 22A, and the upper surface of the third extension portion 23A are respectively a first back surface 21B, a second back surface 22B, This is referred to as a third back surface 23B. The second back surface 22B and the third back surface 23B face each other.

  As shown in FIGS. 4 and 5, 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. 1) 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 23B. The front first regulating member 231A is a plate-like member extending upward from the inside of the curved portion 213 (see FIG. 1) in the third back surface 23B. 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. 4, 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 23B. The rear first regulating member 231B is a plate-like member that extends upward along the rear end of the third extending portion 23A. 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 23B form a groove 231C that is recessed downward.

  As shown in FIGS. 4 and 5, a hole 21 </ b> D that penetrates in the front-rear direction is provided at the center of the first housing 21 in the vertical direction and on the left side of the center of the housing 12 in the left-right direction. A protrusion 4A (see FIG. 6) of the adjusting mechanism 4 described later fits into the hole 21D from the rear side. Around the hole 21 </ b> D of the first housing 21, a recess 21 </ b> E that is recessed in a circular shape toward the rear is provided. An operation member 3 (see FIG. 6) 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. 5, the second restriction member 211 is disposed on the right side of the left and right positions of the front first restriction members 221 </ b> A and 231 </ b> A. As shown in FIG. 4, 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> B and 231 </ b> 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. 11) is equal to the length (thickness) in the left-right direction of the first end portion 51 (see FIG. 11).

  As shown in FIG. 4, a plurality of holes 24 </ b> D and a plurality of holes 24 </ b> 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 </ b> 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 </ b> 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. 2) is connected to the hole 25D. The HMD 1 is connected to an external device (not shown) via the communication line 28. The external device outputs image data to the HMD 1.

  A housing engaging portion 241 is provided at the fourth extending portion 24 </ b> A of the fourth housing 24, more specifically, at the left end 24 </ b> C 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 </ b> 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. 6, the housing 12 is formed by combining a front housing 13 and a rear housing 14. The front housing 13 includes front portions of the first housing 21, the second housing 22, and the third housing 23, and a fifth housing 25. The rear housing 14 includes rear portions of the second housing 22 and the third housing 23, and a fourth housing 24. The lens unit 6, the image unit 7, and the engaging portion 4 </ b> 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. 2). As shown in FIG. 6, the image unit 7 includes a first holding member 71, a liquid crystal display device 72, and a second holding member 73.

  The first holding member 71 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. 7) 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. 7, each of the upper part and the lower part of the cylindrical member 71 </ b> 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. 6, each of the side plate members 71B, 71C, 71D is a flat plate-like member 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. 4) 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. 7, the image unit 7 includes 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. 6, the liquid crystal display device 72 includes a glass substrate 72A and a liquid crystal panel 72B. The glass substrate 72A and the liquid crystal panel 72B are disposed in a portion of the first holding member 71 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 72A 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 72A to the left.

  The second holding member 73 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 72. 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. 2) is connected to the control board 73B. The control board 73 </ b> 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. Furthermore, a retinal 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. 9, 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 convex 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 convex portion 64 is provided symmetrically with respect to a plane that passes through the center of the curved portion 61A in the vertical direction and is parallel to the front-rear and left-right directions. The convex part 64 is cylindrical. The convex portion 64 fits in the cam groove 42 (see FIG. 10) of the engaging portion 4B of the adjusting mechanism 4 described later. A convex portion 65 projecting rearward is provided at a position including the center in the vertical direction in the curved portion 61B. For example, the convex portion 65 is provided symmetrically with respect to a plane that passes through the center of the curved portion 61B in the vertical direction and is parallel to the front-rear and left-right directions. As shown in FIG. 8, the convex part 65 is rod-shaped. The length of the convex portion 65 in the left-right direction is longer than the length in the vertical direction. The convex portion 65 fits into the groove portion 242 (see FIG. 6) 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. 6, 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. 9) 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. 9, 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 up-down and left-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 </ b> C and 621 </ b> D extends across the left and right ends of the cylindrical member 62. The lengths in the front-rear direction of the protrusions 621C and 621D are substantially the same as the lengths in the front-rear direction of the groove portions 713A and 714A (see FIG. 7).

  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 </ b> 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. 6, 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 </ b> 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> 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 3 </ b> B fits into a recess 21 </ b> E provided in the first housing 21. Since the recess 21E is provided on the left side of the first casing 21 with respect to the horizontal center of the casing 12, the operation member 3 is disposed on the left side of the horizontal center of the casing 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). 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 21 where the operation member 3 is provided. Therefore, as shown in FIG. 3, 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. 3, the diameter Lf of the front end face 3A is smaller than the diameter Lr of the rear end face 3B (see FIG. 6). 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 invention, 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. 6, the adjustment mechanism 4 has 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 41 extending in the front-rear direction is 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 41. The protruding portion 4A protrudes forward from the vicinity of the circular center of the engaging portion 4B. The protrusion 4A enters the hole 21D of the first housing 21 from the rear side and protrudes to the front side of the first surface 21M of the first housing 21. 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. 15 and 16). Accordingly, the operation member 3 and the adjustment mechanism 4 are held by the first casing 21 of the front casing 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 21, as shown in FIG. 3, the diameter Lr of the rear end surface 3B (see FIG. 6) 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. 10, 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 49 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 invention, the angle φ is not limited to 120 degrees, and may be a value smaller than 120 degrees. The convex 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 21.

<Deflection unit 59>
The deflection unit 59 includes a half mirror 56 and a holder 5. As shown in FIG. 6, 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 invention, instead of the half mirror 56 described above, a reflecting 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. 11 and 12, the holder 5 includes a base 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 51 </ b> B is formed in a portion surrounded by the first end portion 51 to the fourth end portion 54. Hereinafter, as shown in FIG. 12, 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. 11, a hole 52 </ b> 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 </ b> 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. 6, 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. 11 and 12, the holder protrusion 52 </ b> B is provided on the upper surface of the portion connected to the fourth end 54 in the second end 52. 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. 12). The length of the extending portion 521B in the left-right direction is the left-right direction between the upper end of the left end 24C (see FIG. 4) of the fourth extending portion 24A and the right end of the rear first regulating member 221B (see FIG. 4). (Hereinafter, also referred to as “the length of the groove portion 221C (see FIG. 4) in the left-right direction”). 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> 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 regulating member 231B (see FIG. 4) (hereinafter referred to as the left-side length). , Also referred to as “the length of the groove portion 231C (see FIG. 4) in the left-right 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. 12, a first holder engagement portion 541A and second holder engagement portions 542A and 542B are provided on the fourth end surface 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. 13 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 22 and the third extending portion 23A of the third housing 23. 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 (see FIG. 4) of the protruding portion 23A from the rear side. The second end portion 52 of the holder 5 moves in parallel below the second back surface 22B (see FIG. 4) 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 23B on the upper side of the third back surface 23B (see FIG. 4) of the third extending portion 23A of the housing 12.

  In the process in which the deflection unit 59 is mounted on the housing 12, the first holder engaging portion 541A (see FIG. 12) is moved to the housing engaging portion 241 (see FIG. 4) provided at the left end 24C 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. 14 shows a state in which the deflection unit 59 is attached to 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. 13) of the first extending portion 21A of the first housing 21 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 22 </ b> A of the second housing 22 and the third extending portion 23 </ b> A of the third housing 23. Since the holder 5 holds the half mirror 56 on the left side with respect to the first end surface 51A to the fourth end surface 54A (see FIG. 12) (see FIG. 6), the half mirror 56 is in contact with the first end 51. 1 Arranged on the left side of the back surface 21B.

  Of the first end surface 51A (see FIG. 12) of the first end portion 51 of the holder 5, the left side surface of the second regulating member 211 (see FIG. 13) is in contact with a position including the center in the vertical direction. The front first restricting member 221 </ b> A (see FIG. 5) 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 231A (see FIG. 5) is in 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 </ b> A and 231 </ b> 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 </ b> A and 231 </ b> 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 521B of the holder protrusion 52B (see FIG. 11) fits into the groove 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. An extending portion 531B of the holder protruding portion 53B (see FIG. 11) fits into the groove portion 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 (see FIG. 11) of the holder 5 is located below the second back surface 22B (see FIG. 4) of the second extending portion 22A of the housing 12 and the second end portion 52. The holder projecting portion 52B is disposed so as to be opposed to and separated from the upper projecting portion 52B. The lower surface of the third end portion 53 (see FIG. 11) of the holder 5 is located above the third back surface 23B (see FIG. 4) of the third extending portion 23A 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.

  Note that the length of the extending portion 521B in the left-right direction is equal to the length of the groove portion 221C in the left-right direction. 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> B constituting the groove 231 </ b> C and the lower end of the left end 24 </ b> C of the fourth extension 24 </ b> A are Regulate direction movement.

  In a state where the deflection unit 59 is mounted on the housing 12, the front side surface of the housing engaging portion 241 (see FIG. 4) contacts the rear side surface of the first holder engaging portion 541A (see FIG. 12). 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 1 will be described. First, the user wears the HMD 1 wearing tool 8 (see FIG. 1) on the head. The user has the main body member 11 (see FIG. 1) in a state where the deflection unit 59 (see FIG. 1) is mounted on the housing 12, and the half mirror 56 (see FIG. 1) is arranged in front of the left eye. Adjust the position so that

  Output of image data is started from an external device (not shown). The control board 73B (see FIG. 6) receives the image data via the communication line 28 (see FIG. 2). 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 72A 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. Accordingly, the user recognizes the main body member 11 of the HMD 1 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 adjustment mechanism 4 rotates according to the rotation of the operation member 3, the convex portion 64 (see FIG. 6) moves along the cam groove 42 (see FIG. 10) of the engaging portion 4B. When the lens unit 6 moves according to the movement of the convex part 64, the groove part 242 restricts the movement of the convex part 65 (see FIG. 8) 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 of the rotation direction (clockwise or counterclockwise), the direction when the HMD 1 is viewed from the front side is indicated unless otherwise specified.

  With reference to FIG. 15, 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. 10) are on the right side with respect to the projecting portion 64 in contact. A force is applied to move the convex portion 64 to the right side. As the convex part 64 moves, the lens unit 6 moves to the right side. The cylindrical member 62 (see FIG. 6) of the lens unit 6 enters the cylindrical member 71A of the image unit 7. The protruding portion 621C (see FIG. 9) 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. 9) of the cylindrical member 62 is the groove portion 714A (see FIG. 9) of the cylindrical member 71A. 7) and move to the right. When the convex portion 64 contacts the first end 42A (see FIG. 10) 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 </ b> A of the image unit 7. The liquid crystal panel 72B (see FIG. 6) of the image unit 7 and the plurality of lenses 63 (see FIG. 6) 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.

  With reference to FIG. 16, the case where the operation member 3 is rotated counterclockwise 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. 10) are on the left side with respect to the projecting portion 64 in contact. A force is applied to move the convex portion 64 to the left side. As the convex portion 64 moves, the lens unit 6 moves to the left side. 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 (see FIG. 9) of the cylindrical member 62 moves to the left along the groove portion 713A of the cylindrical member 71A, and the protruding portion 621D (see FIG. 9) of the cylindrical member 62 is the groove portion 714A (see FIG. 9) of the cylindrical member 71A. 7) to the left. When the convex portion 64 contacts 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 </ b> A of the image unit 7. The liquid crystal panel 72B (see FIG. 6) of the image unit 7 and the plurality of lenses 63 (see FIG. 6) of the lens unit 6 are most separated. 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. 10, since the angle φ formed by the direction 48 and the direction 49 is 120 degrees, the rotatable angle of the operation member 3 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 adjustment mechanism 4, at least a part of each of the cylindrical member 62 and the cylindrical member 71A in the left-right direction 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 (see FIG. 6) is connected to the adjacent one of the plurality of recesses 41 from the state in which the leaf spring 40 (see FIG. 6) is engaged with one of the plurality of recesses 41. Change to the engaged state. The rotation of the adjustment mechanism 4 is suppressed in a state where the leaf spring 40 is engaged with the recess 41, 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 1, the convex portion 64 is provided on the curved portion 61A of the lens unit 6, and the convex portion 65 is provided on the curved portion 61B. The convex portion 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 convex 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 1 is mounted on the user, the convex portions 64 and 65, the groove portion 242 and the cam groove 42 are disposed in the front-rear direction with respect to the user, and are not disposed in the vertical direction. 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 12 is reduced. Therefore, HMD1 can maintain a user's visual field favorably in the state with which the user was equipped.

  The housing 12 of the HMD 1 holds the image unit 7 and the half mirror 56, and fixes the distance between them. In the HMD 1, 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 1 can smoothly move the lens unit 6 in the left-right direction.

  In HMD1, the convex portion 65 projects rearward from the curved portion 61B. The groove portion 242 into which the convex portion 65 is fitted is provided on the inner surface of the fourth housing 24. For this reason, HMD1 can suppress appropriately that the housing | casing 12 becomes large by the convex part 65 and the groove part 242 in the 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 convex part 65 in a direction other than the left-right direction can be restricted. Therefore, the HMD 1 can appropriately move the image unit 7 or the lens unit 6 in the left-right direction. Moreover, the shape of the convex part 65 is a rod shape, and is long in the left-right direction. For this reason, when operation with respect to the operation member 3 is performed, HMD1 can suppress that the lens unit 6 rotates using the axis | shaft extended in the front-back direction as a fulcrum. Therefore, the HMD 1 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 1 is attached to the user with the second housing 22 up and when the HMD 1 is attached to the user with the third housing 23 up. The direction changes. Here, in the HMD 1, the convex portion 64 is provided at a position including the vertical center of the curved portion 61 </ b> A of the lens unit 6. The convex portion 65 is provided at a position including the center in the vertical direction of the curved portion 61 </ b> B 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. Accordingly, the HMD 1 can keep the lens unit 6 horizontal even when the direction of gravity applied to the lens unit 6 changes.

  In HMD1, the convex portion 64 projects forward from the curved portion 61A. The engaging portion 4B of the adjusting mechanism 4 having the cam groove 42 into which the convex portion 64 is fitted is provided on the rear surface of the first housing 21 of the housing 12. For this reason, it can suppress appropriately that the housing | casing 12 becomes large by the convex 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 convex portion 64 is fitted in the cam groove 42 of the engaging portion 4 </ b> B, 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 1 can adjust the focus by changing the distance between the image unit 7 and the lens unit 6.

  In the HMD 1, 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 1 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 protruding 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 plane part 62C, and the protrusion 621D is provided at the center in the front-rear direction of the plane 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 1, the lens unit 6 and the image unit 7 are held in a rear housing 14 that is disposed 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 1 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 1 is manufactured, the image unit 7 can be stabilized. Thereby, manufacture of HMD1 can be facilitated.

  The mounting tool 8 of the HMD 1 includes a first portion 8A that extends in the left-right direction and curves in a convex shape toward the front, and second portions 8B and 8C that extend from both sides of the first portion 8A to the rear side. Further, the HMD 1 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.

<Modification>
In addition, this invention is not limited to the said embodiment, A various change is possible. In the HMD 1 described above, 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. Convex portions may be provided on each of the front and rear surfaces of the image unit 7. A convex portion 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. A convex portion on the rear side of the image unit 7 may be fitted into the groove portion 242 on the front surface of the fourth housing 24 from the front. When the operation member 3 and the adjustment mechanism 4 rotate, the image unit 7 may move in the left-right direction. Further, convex portions 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 convex portion 65 of the lens unit 6 may be cylindrical. The position where the convex 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 convex 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 convex portion protruding forward may be provided. And the convex part of the 4th housing | casing 24 fits in the groove part of the lens unit 6, and it is good also as the lens unit 6 being movable to the left-right direction by moving a convex part to the left-right direction along a groove part.

  Instead of the convex 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 convex portion 64 of the lens unit 6 may protrude to the front side of the first housing 21 through a slit provided in the first housing 21 of the housing 12. A cam groove 42 may be provided on the rear end surface 3 </ b> B of the operation member 3. The convex portion 64 protruding to the front side of the first housing 21 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 convex portion 64 moving in the left-right direction along the slit according to the rotation of the operation member 3.

  In the HMD 1 described above, the image unit 7 may be provided with the groove portions 713A and 714A on the front side or the rear side of the plane portions 713 and 714 with respect to the front-rear direction center. 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> 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, the HMD 1 may be configured with only 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 1 may be configured by the connection tool 9 and the main body member 11 without including the mounting tool 8.

  The horizontal direction of the HMD 1 is an example of the “first direction” in the present invention. The left side of the HMD is an example of “one side in the first direction” of the present invention, and the right side is an example of “the other side in the first direction” of the present invention. The front-rear direction of the HMD 1 is an example of the “second direction” in the present invention. The rear side of the HMD is an example of “one side in the second direction” in the present invention, and the front side is an example of “the other side in the second direction” in the present invention. The vertical direction of the HMD 1 is an example of the “third direction” in the present invention. The upper side of the HMD is an example of “one side in the third direction” of the present invention, and the lower side is an example of “the other side in the third direction” of the present invention. The half mirror 56 is an example of the “deflecting member” in the present invention. The convex portion 65 is an example of the “first engaging member” or “first protruding portion” in the present invention. The convex portion 64 is an example of the “second engaging member” or “second projecting portion” in the present invention. The groove portion 242 is an example of the “third engagement member” or “first groove portion” in the present invention. The cam groove 42 is an example of the “fourth engaging member” or “second groove portion” in the present invention. The rear housing 14 is an example of the “first housing” in the present invention. The front housing 13 is an example of the “second housing” in the present invention. The protrusions 621C and 621D are examples of the “third protrusion” in the present invention. The grooves 713A and 714A are examples of the “third groove” in the present invention. The protruding portions 712A, 712B, and 712C are examples of the “planar portion” of the present invention. The cylindrical member 62 is an example of the “lens unit overlapping portion” in the present invention. The cylindrical member 71A is an example of the “image unit overlapping portion” in the present invention.

1: HMD
3: Operation member 4: Adjustment mechanism 5: Holder 6: Lens unit 7: Image unit 8: Mounting tool 8A: First part 8B: Second part 8C: Second part 9: Connection tool 12: Housing 42: Cam groove 56: Half mirror 59: Deflection unit 63: Lens 64: Convex part 65: Convex part 77: Optical axis 242: Groove part 621C: Protrusion part 621D: Protrusion part 712: Protrusion part 713A: Groove part 714A: Groove part

Claims (7)

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 ,
Having a first housing on one side in a second direction orthogonal to the first direction, and having a second housing on the other side in the second direction;
The first casing holds the position of the image unit with respect to the casing in a fixed manner, and holds the position of the lens unit with respect to the casing so as to be movable in the first direction.
A housing ,
Wherein one of the housing, a member provided on the one side of the first direction relative to the lens unit, the image light guided by the lens unit, to the one side of the second direction A deflecting member capable of deflecting;
Provided on the one side of the second direction before Symbol lens unit, a first engagement member having a first protrusion protruding to the one side of the second direction,
Provided on the other side of the second direction before Symbol lens unit, and the second engaging member having a second protrusion cylindrical projecting to the other side of the second direction,
Of the first casing, a member provided on the inner side surface of the one side portion in the second direction, the first groove extending in the first direction and fitting the first protrusion. A third engagement member that engages with the first engagement member and is movably supported in the first direction;
An adjustment mechanism provided on the other side of the second direction of the second engagement member,
A 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;
The fourth engagement member has a spiral second groove portion into which the second protrusion fits; and an adjustment mechanism;
An operation member that is held by the second housing of the housing, is connected to the adjustment mechanism, and allows the user to operate the adjustment mechanism.
A first portion extending in the first direction and curved in a convex shape toward the other side in the second direction, and a pair of second portions extending from both sides of the first portion to the one side in the second direction. A fitting having a portion;
A connection tool extending from the first portion of the wearing tool and having the first housing connected to a tip thereof;
Wherein the length in the first direction of the first projection, head-mounted display, wherein longer than the length in the third direction perpendicular to the first direction and the second direction. The head mounted display according to claim 1, wherein the casing holds a fixed distance between the image unit and the deflection member. Said first protrusion of pre Symbol the one side of the second direction before Symbol lens unit, provided at a position including the center of said third direction,
The second engaging member of the other side of the front Stories second direction before Symbol lens unit, provided at a position including the center of said third direction,
The third engagement member is provided at a position including a center in the third direction on an inner side surface of the casing of the one side portion in the second direction of the first casing. Item 3. The head mounted display according to Item 1 or 2 . Before SL lens unit is moved between said a first state in which the relative distance of the first direction is closest, second state in which the relative distance is farthest between said image unit and the lens unit Held in the first housing as possible,
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. most adjacent portion, wherein at least one of the head mounted display according to any one of claims 1 to 3, the third protruding portion is characterized by at least one third groove fits from the inside. 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,
Said at least one third groove, claim characterized in that it has a pair of third grooves which are provided in each of said image unit overlapping portion the one side and the other side in the direction perpendicular to the optical axis of the 4 The head mounted display as described in. The at least one third protrusion is provided at a position including the center of the lens unit in the second direction,
Wherein the at least one third groove, a head mounted display according to claim 4 or 5, characterized in that provided at a position including the second direction of the center of the image unit. On the other side of the second direction of said image units, head according to any of claims 1 6, characterized in that it comprises a flat portion including a plurality of end portions which are arranged on the same plane Mount display .

Images