JP2016031504A - Image display device and head-mounted display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device that has an adjuster with good operability in performing focus adjustment, and a head-mounted display.SOLUTION: An HMD 1 includes: an image unit; a lens unit; a housing 12 that has at least a first surface 21M arranged on the front side, a second surface 22M extending backward from the upper side of the first surface 21M, and a third surface 23M extending backward from the lower side of the first surface 21M; a half mirror 56 that is provided on the left side of the housing 12 and on the left side with respect to the lens unit to deflect image light guided by the lens unit to the rear side; an operation member 3 that is provided at a position on the first surface 21M on the left side with respect to the center in the transverse direction of the housing 12 and can rotate with a shaft extending in the fore-and-aft direction as a fulcrum; and an adjustment mechanism that is connected to at least one of the image unit and lens unit and can move at least one of the image unit and lens unit in the transverse direction according to the rotation of the operation member 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image display device mounted on a user's head and a 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. The HMD includes an adjuster for performing focus adjustment. The adjuster has a ring shape, and can be rotated about an axis extending in the same direction as the longitudinal direction of the casing (hereinafter referred to as “left-right direction”). A part of the adjuster is exposed to the outside through a slit provided in the housing. The distance on the optical axis between the liquid crystal holder and the lens holder in the housing changes according to the rotation of the adjuster. The user performs an operation of applying a force with a finger in a vertical direction perpendicular to the left-right direction to a portion exposed from the slit in the adjuster, and rotates the adjuster. Thus, the user changes the distance on the optical axis between the liquid crystal holder and the lens holder to adjust the focus.

JP 2013-44828 A

  Normally, the user performs focus adjustment with the hand on which the HMD is mounted while the HMD is mounted in front of one eye. The reason is that when the focus is adjusted with the hand opposite to the side where the HMD is attached, the opposite hand is located in front of the eye opposite to the side where the HMD is attached and the field of view is blocked. It is. At this time, the case may move up and down due to the force applied by the user to the adjuster. For this reason, the user holds the casing with the index finger or the middle finger and the thumb sandwiched from the vertical direction in order to suppress the casing from moving in the vertical direction. In this state, the user applies a vertical force to the adjuster with any of the remaining fingers to rotate the adjuster. Here, the operation of moving any of the remaining fingers in the vertical direction with the index finger or the middle finger and the thumb sandwiched between the case is performed with the position of the index finger or the middle finger and the thumb fixed, Will move up and down. Therefore, it is necessary to open either the index finger or the middle finger and the remaining finger, which is an unnatural operation for the user. Therefore, there is a problem that the user cannot easily operate the adjuster when performing focus adjustment.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image display device and a head-mounted display with good adjuster operability when performing focus adjustment.

  An image display device according to a first aspect of the present invention includes an image unit capable of generating image light and a plurality of lenses each having an optical axis extending in a first direction, and the first direction with respect to the image unit. A lens unit disposed on one side of the lens unit, and a housing that covers at least a part of the image unit and the lens unit, and a second unit orthogonal to the first direction with respect to the image unit and the lens unit. The first surface disposed on one side of the direction, from one side of the third direction orthogonal to both the first direction and the second direction of the first surface toward the other side of the second direction A housing having at least a second surface extending, and a third surface extending from the other side of the third direction toward the other side of the second direction, and the one side of the housing in the first direction, And for the lens unit A deflecting member provided on the one side in the first direction and deflecting the image light guided by the lens unit to the other side in the second direction; An operation member that is provided at a position on the one side of the center in the first direction and is rotatable about an axis extending in the second direction, and at least one of the image unit and the lens unit; And an adjusting mechanism capable of moving at least one of the image unit and the lens unit in the first direction in accordance with the rotation of the operation member.

  The user places the image display device in front of the eyes on the other side in the first direction (one side in the first direction of the user) when the image display device is viewed from the front, and the other in the first direction. An operation member provided on the first surface by one of the remaining fingers, holding the case with the index finger or middle finger and thumb of the side hand sandwiching the second and third surfaces of the case from above and below. An example will be given in which a force is applied to cause rotation. Here, since the operation member can rotate about the axis extending in the second direction, the user moves any of the remaining fingers in a direction inclined in the left-right direction with respect to the up-down direction. Thus, the operation member can be rotated. In addition, the user can implement | achieve the operation | movement which moves a remaining finger in the direction inclined in the left-right direction by expanding / contracting the remaining finger. For this reason, the user can naturally perform the operation of rotating the operation member. Therefore, the image display apparatus can improve the operability of the operation member when the user performs focus adjustment.

  The operation member is provided at a position on one side of the first surface with respect to the center in the first direction. Accordingly, when the user holds the housing with the index finger or the middle finger and the thumb, the contact area between the index finger or the middle finger and the thumb and the housing (second surface and third surface) can be further increased. Therefore, the user can operate the operation member while holding the casing appropriately.

  In the first aspect, an end portion on the one side in the third direction of the operation member is closer to the other side in the third direction than an end portion on the one side in the third direction of the first surface. The other end of the operation member in the third direction is disposed closer to the one side in the third direction than the other end of the first surface in the third direction. It may be arranged. In this case, the user can rotate the operation member by an operation of moving the remaining finger to the palm side of the index finger or the middle finger holding the housing. The operation of moving the remaining finger to the palm side rather than the index finger or the middle finger is a more natural operation for the user. Therefore, the image display apparatus can improve the operability of the operation member when the user performs focus adjustment.

  1st aspect WHEREIN: The length of the said 3rd direction of the said one side edge part of the said 2nd direction in the 1st specific position of the said 1st direction among the said operation members is a said 1st among the said operation members. The one side of the second direction at the second specific position in the third direction is shorter than the length of the third direction at the other end in the second direction at the specific position. The length in the first direction of the end portion may be shorter than the length in the first direction of the end portion on the other side in the second direction at the second specific position in the operation portion. In this case, the portion of the operating member extending from the other side in the second direction to the one side is inclined with respect to the second direction. When the user moves the remaining finger toward the palm while holding the housing with the index finger or middle finger, the belly part of the remaining finger is inclined with respect to the belly part of the index finger or middle finger. . Therefore, the user can easily apply force to the operation member when the remaining finger is brought into contact with the operation member. For this reason, the user can operate the operation member more easily.

  In the first aspect, the operation member has a frustum shape, and the direction extending from the lower base toward the upper base faces the one side of the second direction, the second direction, and the operation member in the operation member. The acute angle formed by the side surface of the truncated cone shape may be 40 degrees or less. In this case, the user can easily apply a force in a direction orthogonal to the extending direction to the portion of the operation member extending from the other side in the second direction toward the one side. For this reason, the user can operate the operation member more easily.

  In the first aspect, the operation member includes a first member that extends from the first surface toward the one side in the second direction, and a first member that protrudes from the first member in a direction that intersects the first direction. Two members may be provided. In this case, the user can easily rotate the operation member by applying force by bringing the remaining finger into contact with the second member.

  In the first aspect, the second member may have a plurality of protrusions that protrude in different directions. In this case, the user can easily operate the operation member by applying force to any of the plurality of protrusions.

  In the first aspect, the rotatable angle of the operation member may be 120 degrees or less. In this case, the user can minimize the number of times when the remaining fingers are expanded and contracted when performing the focus adjustment.

  In the first aspect, a length in the second direction from the first surface of the housing to an end portion on the one side in the second direction of the operation member may be 3 mm or more. In this case, the user can apply a force by appropriately bringing a finger into contact with the operation member.

  In the first aspect, a portion where the first surface and the second surface of the housing are connected and a portion where the first surface and the second surface are connected may be curved. In this case, the user can suppress the remaining fingers from being caught on the corners of the casing in the process of bringing the remaining fingers closer to the operation member from the second surface or the third surface. Therefore, the user can smoothly operate the operation member.

  In the first aspect, the distance between the second surface and the third surface may decrease as the distance from the other side in the second direction approaches the one side. In the image display device, the index finger or the middle finger that is brought into contact with the second surface in order to hold the housing by the user can be naturally inclined to one side with respect to the second direction. In this case, the user can further easily tilt the remaining fingers with respect to the second direction. For this reason, since it becomes easier for the user to apply force to the operation member from the remaining fingers, the operation member can be operated more easily.

  In the first aspect, the end on the one side in the first direction of the first surface is more than the end on the one side in the first direction of each of the second surface and the third surface. Arranged on the other side in the first direction, the deflection member is a portion sandwiched between the second surface and the third surface, and the position in the first direction is on the one side with respect to the first surface. May be arranged. In this case, the user can hold the vicinity of the portion where the deflection member is held on the second surface and the third surface with the index finger or the middle finger and the thumb. Therefore, the user can easily hold the housing with the index finger, the middle finger, and the thumb. Further, since the deflecting member is disposed at a portion sandwiched between the second surface and the third surface, it is possible to prevent the user's finger from coming into contact with the deflecting member and contaminating the deflecting member. Furthermore, external light coming from one side in the second direction can appropriately enter the deflecting member. That is, the image display apparatus can suppress the outside light from being blocked by the first surface.

  A head mounted display according to a second aspect of the present invention includes an image display device according to the first aspect, and a first portion that extends in the first direction and curves in a convex shape toward the one side in the second direction, And the mounting tool which has a pair of 2nd part extended to the said other side of the said 2nd direction from the both sides of the said 1st part, and it extended from the said 1st part of the said mounting tool, and the said housing | casing was connected to the front-end | tip. And a connector. According to the 2nd aspect, a deflection | deviation member can be hold | maintained in front of a user's eyes in the state with which the mounting tool was mounted | worn with the user's head. Therefore, the user can work using both hands while visually recognizing the image light changed by the deflecting member.

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. 2 is a perspective view of a 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. 3 is a perspective view of a lens unit 6, an image unit 7, an operation member 3, and an adjustment mechanism 4. FIG. 3 is a perspective view of a lens unit 6, an image unit 7, an operation member 3, and an adjustment mechanism 4. FIG. 3 is a left side view of the main body member 11. FIG. It is a perspective view of main body member 11A of HMD1 in a modification.

  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 in the up-down direction of the first housing 21 and on the left side of the center in the left-right direction of the housing 12. An adjusting mechanism 4 (see FIG. 6) to be 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. 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. 9) is equal to the length (thickness) in the left-right direction of the first end 51 (see FIG. 9).

  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.

  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 adjustment 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 is provided on the front surface of the rear side surface (fourth housing 24) of the rear housing 14. The groove part 242 extends 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 cylindrical member extending in the left-right direction. The side plate members 71B, 71C, 71D are flat plate-like members that extend rightward from the front end, the rear end, and the lower side of the right end portion of the cylindrical member 71A, respectively. 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. The first holding member 71 is held at a fixed position with respect to the housing 12 by screws inserted into the plurality of holes 24D (see FIG. 4).

  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 square 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. The cylindrical member 62 is a cylindrical member extending in the left-right direction. The cylindrical member 62 is provided on the right side of the holding member 61. The radius of the cylindrical member 62 is slightly smaller than the radius of the cylindrical member 71A of the image unit 7. At least a part of the cylindrical member 62 fits inside 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.

  On the front surface 61 </ b> A of the holding member 61, a convex portion 64 that protrudes forward is provided. The convex part 64 is cylindrical. The convex portion 64 fits in a cam groove 42 (see FIG. 8) of the adjusting mechanism 4 described later. As shown in FIG. 7, a convex portion 65 protruding rearward is provided on the rear surface 61 </ b> B of the holding member. The convex portion 65 has a rod shape that is long in the left-right direction. The convex portion 65 fits into the groove portion 242 (see FIG. 6) of the fourth housing 24.

<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, respectively. 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 adjusting mechanism 4 is a circular plate-like member. Both surfaces of the adjusting mechanism 4 face in the front-rear direction. A plurality of recesses 41 extending in the front-rear direction are provided on the side surface of the adjustment mechanism 4. The leaf spring 40 provided inside the housing 12 engages with any of the plurality of recesses 41. The adjustment mechanism 4 has a protruding portion 4A that protrudes forward from the vicinity of the center of the circle. 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. A portion of the protruding portion 4A that protrudes to the front side of the first surface 21M is fitted in a fitting groove (not shown) of the rear end surface 3B of the operation member 3 (see FIGS. 13 and 14). As a result, the operation member 3 and the adjustment mechanism 4 are held by the first housing 21. The adjustment mechanism 4 is rotatable integrally with the operation member 3 with an axis extending in the front-rear direction passing through the circular center 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. 8, a cam groove 42 is provided on the rear side surface of the adjustment mechanism 4. The cam groove 42 is formed when a part of the rear side surface of the adjusting mechanism 4 is recessed forward. The cam groove 42 extends in a spiral shape with the circular center X of the adjustment mechanism 4 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 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. 9 and 10, the holder 5 includes a foundation member 50. The base member 50 has a plate-like first end 51, second end 52, third end 53, and fourth end 54. Of the three pairs of 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 pairs of 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 pairs of 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. 10, 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. 9, 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. 9 and 10, 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. 10). 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. 10, the first holder engaging portion 541A and the second holder engaging portions 542A and 542B are provided on the fourth end face 54A of the fourth end portion 54. The first holder engaging portion 541A protrudes to the right from the center of the fourth end surface 54A in the up-down direction and from the front side of the front-rear direction center. The second holder engaging portion 542A protrudes to the right from the upper side in the vertical direction of the fourth end face 54A and from the rear side in the front-rear direction. The second holder engagement portion 542B protrudes to the right from the lower side of the fourth end surface 54A and the rear side of the front and rear direction center.

  The deflection unit 59 is detachably supported on the housing 12. FIG. 11 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 541 A (see FIG. 10) is moved to the housing engaging portion 241 (see FIG. 4) provided at the left end 24 C of the fourth housing 24. ) From the rear side. When further force is applied to the front side with respect to the holder 5, the fourth end portion 54 bends to the left side, so that the first holder engaging portion 541 A gets over the left side of the housing engaging portion 241 and moves to the housing. It moves to the front side of the body engaging portion 241.

  FIG. 12 shows a state in which the deflection unit 59 is mounted on the housing 12. The front end of the first end portion 51 of the holder 5 comes into contact with the vicinity of the left end 21C of the first back surface 21B (see FIG. 11) 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. 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. 10) (see FIG. 6), so that the half mirror 56 is in contact with the first end 51. 1 Arranged on the left side of the back surface 21B.

  Of the first end surface 51A (see FIG. 10) of the first end portion 51 of the holder 5, the left side surface of the second regulating member 211 (see FIG. 11) is in contact with the 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. 9) 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. The extension 531B of the holder protrusion 53B (see FIG. 9) fits into the groove 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. 9) of the holder 5 is 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. 9) of the holder 5 is located above the third back surface 23 </ b> B (see FIG. 4) of the third extending portion 23 </ b> A 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. 10). 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. 8). 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. 7) 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. 13, 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. 8) 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. When the convex portion 64 contacts the first end 42A (see FIG. 8) 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 distance between 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 close to each other.

  With reference to FIG. 14, the case where the operation member 3 rotates counterclockwise will be 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. 8) 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. 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 with respect to the left end of the cylindrical member 71A of the image unit 7. The distance between 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 is separated.

  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. 8, 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>
The user wears the wearing tool 8 and places the half mirror 56 in front of the left eye (the right-hand eye). Here, as shown in FIG. 15, the user sandwiches the second surface 22M and the third surface 23M of the housing 12 from above and below with the index finger 85 and the thumb 87 of the left hand (right hand). An example is given of a case where 12 is held and the middle finger 86 rotates the operation member 3 on the first surface 21M by applying force. Here, since the operation member 3 is rotatable about a shaft extending in the front-rear direction, the user moves the middle finger 86 in a direction inclined from the upper right to the lower left (upper left to lower right). Accordingly, the operation member 3 can be rotated. The user can realize the operation of moving the middle finger 86 as described above by expanding and contracting the middle finger 86. For this reason, the user can naturally perform the operation of rotating the operation member 3. Therefore, the HMD 1 can improve the operability of the operation member 3 when the user performs focus adjustment.

  Further, the operation member 3 is provided on the first surface 21M at a position on the left side of the center in the left-right direction of the housing 12 (see FIG. 1 and the like). In this case, when the user holds the casing 12 with the index finger 85 and the thumb 87 of the left hand (right hand), the index finger 85 and the thumb 87 and the casing 12 (the second surface 22M and the third surface 23M). ) Can be made larger. Therefore, the user can operate the operation member 3 while holding the housing 12 appropriately.

  The upper end portion of the operating member 3 is disposed on the upper end portion of the first surface 21M, that is, below the connection position 212S. Moreover, the lower end part of the operation member 3 is arrange | positioned above the lower end part of the 1st surface 21M, ie, the connection position 213S. In this case, the user can move the middle finger 86 closer to the palm side than the index finger 85 holding the housing 12 and rotate the operation member 3 by applying a force. Normally, when the user extends or retracts the middle finger 86, the middle finger 86 moves closer to the palm than the index finger 85. Therefore, the user can appropriately rotate the operation member 3 by the expansion / contraction operation of the middle finger 86. Thus, the HMD 1 can improve the operability of the operation member 3 when the user performs focus adjustment.

  The side surface 3C of the operation member 3 is inclined with respect to the front-rear direction. When the user moves the middle finger 86 to the palm side with the index finger 85 holding the housing 12, the belly portion 86 </ b> A of the middle finger 86 is inclined with respect to the belly portion 85 </ b> A of the index finger 85. Therefore, the user can easily apply force to the operation member 3 when the middle finger 86 is brought into contact with the operation member 3. For this reason, the user can operate the operation member 3 more easily.

  The operating member 3 has a frustum shape, and the acute angle formed by the front-rear direction and the side surface 3C is 40 degrees. Here, when the user moves the middle finger 86 to the palm side, the angle of the belly portion 86A of the middle finger 86 with respect to the belly portion 85A of the index finger 85 is often 40 degrees or less. Therefore, the user can easily apply force by bringing the belly portion 86A of the middle finger 86 into close contact with the side surface 3C of the operation member 3. For this reason, the user can operate the operation member 3 more easily.

  The lens unit 6 changes from a state where the operation member 3 is moved to the right side (see FIG. 13) to a state where it is moved to the left side (see FIG. 14) by rotating the operation member 3 120 degrees. For this reason, since the user does not need to rotate the operation member 3 many times when performing the focus adjustment, the focus adjustment response by the operation on the operation member 3 can be improved.

  The length in the front-rear direction from the first surface 21M of the housing 12 to the front end surface 3A of the operation member 3 is 3 mm. In this case, the user can apply force by appropriately bringing the belly portion 86 </ b> A of the middle finger 86 into close contact with the side surface 3 </ b> C of the operation member 3.

  The curved portion 212 where the first surface 21M and the second surface 22M of the housing 12 are connected and the curved portion 213 where the first surface 21M and the third surface 23M are connected are curved. In this case, the user can suppress the middle finger 86 from being caught on the corner of the housing 12 in the process of bringing the middle finger 86 closer to the operation member 3 from the second surface 22M. For this reason, the user can operate the operation member 3 smoothly.

  The distance between the second surface 22M and the third surface 23M decreases from the rear toward the front. In this case, the index finger 85 brought into contact with the second surface 22M in order for the user to hold the housing 12 can be inclined naturally from the rear oblique upper side to the front oblique lower side. In this case, it becomes easier for the user to tilt the middle finger 86 from the obliquely upper rear side to the obliquely lower front side. For this reason, the user can more easily apply force to the operation member 3 with the middle finger 86, so that the operation member 3 can be operated more easily.

  The holder 5 and the half mirror 56 are disposed in a region sandwiched between the second extending portion 22A and the third extending portion 23A. In this case, the user can hold the upper and lower portions of the second surface 22M and the third surface 23M where the half mirror 56 is held with the index finger 85 and the thumb 87. Therefore, the user can easily hold the housing 12 with the index finger 85 and the thumb 87 and place the half mirror 56 in front of the left eye. Moreover, since the half mirror 56 is disposed at a portion sandwiched between the second surface 22M and the third surface 23M, it is possible to prevent the user's finger from coming into contact with the half mirror 56 and soiling the half mirror 56. Furthermore, since the left end 21C of the first extending portion 21A is curved rightward, the first extending portion 21A is not disposed in front of the half mirror 56. For this reason, external light coming from the front is not shielded by the first housing 21 and appropriately enters the half mirror 56. For this reason, HMD1 can suppress that external light is shielded by the first surface 21M of the first extension portion 21A.

  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>
With reference to FIG. 16, a main body member 11 </ b> A of the HMD 1 in a modification of the present invention will be described. The main body member 11A is different from the main body member 11 (see FIG. 2 and the like) in that the operation member 3 is changed to the operation member 30, and other parts are the same. Hereinafter, only the operation member 30 will be described, and description of other parts will be omitted.

  In the main body member 11 </ b> A, the operation member 30 includes a first member 36 and a second member 37. The first member 36 protrudes forward from the recess 21 </ b> E of the first surface 21 </ b> M of the first housing 21. The first member 36 is cylindrical. The central axis of the first member 36 is parallel to the front-rear direction. The second member 37 is provided on the front end surface 36 </ b> A of the first member 36. The second member 37 has a rod shape with a rectangular cross section. The second member 37 extends in a direction (vertical direction in the case of FIG. 16) orthogonal to the front-rear direction. The length of the second member 37 is larger than the diameter of the front end surface 36 </ b> A of the first member 36. One end 37 </ b> A and the other end 37 </ b> B of the second member 37 protrude outward from the side surface of the first member 36.

  A fitting groove (not shown) in which the protruding portion 4A (see FIG. 6) of the adjustment mechanism 4 is fitted is provided on the rear end surface of the first member 36. The operation member 30 and the adjustment mechanism 4 are held by the first housing 21 in a state where the protrusion 4A is fitted in the fitting groove. The operation member 30 and the adjustment mechanism 4 can be rotated together with the central axis of the operation member 30 as a fulcrum.

  In the above case, when the user wears the wearing tool 8 and places the half mirror 56 in front of the left eye (the right-hand eye), the user can end the second member 37 of the operation member 30. It is possible to easily apply force to the portion 37A with the middle finger 86. Therefore, the user can easily rotate the operation member 30.

  An example will be given in which the user places the half mirror 56 in front of the right eye (the left eye toward the left). In this case, the user places the second surface 22M of the second housing 22 on the lower side so that the field of view of the left eye of the user is not blocked by the main body member 11, and the third surface of the third housing 23 The main body member 11 is used in a state in which the surface 23M is disposed on the upper side (that is, a state in which the vertical direction is reversed with respect to FIG. 1). The end portion 37 </ b> A of the second member 37 protrudes downward with respect to the first member 36, and the end portion 37 </ b> B protrudes upward with respect to the first member 36. In this case, since the user can easily apply force to the end portion 37B with the middle finger 86, the operation member 30 can be easily rotated. As described above, the operation member 30 is used in a state where the vertical direction of the main body member 11 is inverted, that is, in a state where the half mirror 56 is disposed in front of the user's left eye (right eye toward the user). Even in such a case, the user can easily adjust the focus.

  In addition, this invention is not limited to said embodiment and modification, Various deformation | transformation are 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 image unit 7 may be held so as to be movable in the left-right direction. A convex portion may be provided on the front surface of the image unit 7. The convex portion of the image unit 7 may be fitted into the cam groove 42 of the adjustment mechanism 4 from the rear. When the operation members 3 and 30 and the adjustment mechanism 4 rotate, the image unit 7 may move in the left-right direction. Further, focus adjustment may be performed by moving both the image unit 7 and the lens unit 6 in the left-right direction.

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

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

  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.

  In the above, the second member 37 of the operation member 30 may be a rod-shaped member extending in one direction from the center of the front end surface 36A of the first member 36. Further, the second member 37 may be a plurality of rod-shaped members extending in three or more directions from the center of the front end surface 36A of the first member 36. The extending direction of the second member 37 may be inclined with respect to the direction orthogonal to the front-rear direction. The second member 37 of the operation member 30 may protrude from the side surface of the first member 36.

  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 front side of the HMD is an example of “one side in the second direction” of the present invention, and the rear side is an example of “the other side in the second direction” of 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 first surface 21M is an example of the “first surface” in the present invention. The second surface 22M is an example of the “second surface” in the present invention. The third surface 23M is an example of the “third surface” 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: Connecting tool 12: Housing 21C: Left end 21M : First surface 22C: Left end 22M: Second surface 23C: Left end 23M: Third surface 30: Operation member 36: First member 37: Second member 212: Curved portion 213: Curved portion θ: Angle φ: Angle

Claims (12)

An image unit capable of generating image light;
A plurality of lenses each having an optical axis extending in a first direction, and a lens unit disposed on one side of the first direction with respect to the image unit;
A housing that covers at least a part of the image unit and the lens unit, and is disposed on one side of a second direction orthogonal to the first direction with respect to the image unit and the lens unit. A second surface extending from one side of a third direction orthogonal to both the first direction and the second direction of the first surface toward the other side of the second direction; and the first surface A housing having at least a third surface extending from the other side of the third direction toward the other side of the second direction;
The image light, which is provided on the one side in the first direction of the housing and on the one side in the first direction with respect to the lens unit, and is guided by the lens unit, in the second direction. A deflecting member for deflecting to the other side;
An operating member provided at a position on the one side of the first surface with respect to the center in the first direction of the housing and rotatable about an axis extending in the second direction;
An adjustment mechanism that engages with at least one of the image unit and the lens unit and can move at least one of the image unit and the lens unit in the first direction in response to rotation of the operation member; An image display device comprising:   The one end portion in the third direction of the operation member is disposed on the other side in the third direction from the one end portion in the third direction of the first surface, and The other end portion of the operation member in the third direction is disposed on the one side in the third direction with respect to the other end portion in the third direction of the first surface. The image display device according to claim 1, wherein   Among the operating members, the length in the third direction of the one end portion in the second direction at the first specific position in the first direction is the first length at the first specific position among the operating members. It is shorter than the length in the third direction of the other end portion in two directions, and the one end portion in the second direction in the second specific position in the third direction among the operation members. The length in the first direction is shorter than the length in the first direction of the other end portion of the second direction in the second specific position of the operation member. Image display device.   The operation member has a frustum shape, and the direction extending from the lower base toward the upper base faces the one side of the second direction, and the second direction and the frustum-shaped side surface of the operation member. The image display device according to claim 3, wherein an acute angle formed by the angle is 40 degrees or less. The operating member is a first member extending from the first surface toward the one side in the second direction;
The image display device according to claim 1, further comprising: a second member protruding from the first member in a direction intersecting the first direction.   The image display device according to claim 5, wherein the second member has a plurality of protruding portions that protrude in different directions.   The image display device according to claim 1, wherein an angle at which the operation member is rotatable is 120 degrees or less.   8. The length in the second direction from the first surface of the housing to the end on the one side in the second direction of the operation member is 3 mm or more. An image display device according to any one of the above.   9. The device according to claim 1, wherein a portion where the first surface and the second surface of the housing are connected and a portion where the first surface and the second surface are connected are curved. An image display device according to claim 1.   10. The image according to claim 1, wherein a distance between the second surface and the third surface decreases from the other side in the second direction toward the one side. 11. Display device. The end on the one side in the first direction of the first surface is the other end in the first direction on the one side in the first direction of each of the second surface and the third surface. Placed on the side
The deflection member is characterized in that a portion sandwiched between the second surface and the third surface and a position in the first direction are arranged on the one side with respect to the first surface. The image display device according to claim 1. An image display device according to any one of claims 1 to 11,
A first portion that extends in the first direction and curves convexly toward the one side in the second direction, and a pair of second portions that extend from both sides of the first portion to the other side in the second direction. A fitting having a portion;
A head-mounted display comprising: a connection tool extending from the first portion of the wearing tool and having the housing connected to a tip thereof.

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