JP6206437B2 - Image display device and head mounted display - Google Patents

Description

  The present invention relates to an image display device used in a state of being mounted on a user's head, and a head mounted display.

  2. Description of the Related Art Conventionally, a head mounted display (hereinafter referred to as “HMD”) that allows an observer to observe an image formed by a display element such as a liquid crystal using an optical system is known. Patent document 1 discloses HMD provided with the display apparatus and the mounting part. The display device includes a display unit and a display unit side connecting member. The mounting portion includes a neckband, a control device, and a mounting portion side connection member. The mounting portion side connection member is configured by a magnet formed in a columnar shape, and is provided with a conical recess. Moreover, the display part side connection member is comprised with the iron member formed in the triangular pyramid shape, and the some rib is provided toward the vertex from the bottom face part side. A plurality of grooves are provided in the concave portion of the mounting portion side connection member toward the apex. The plurality of grooves are arranged at equal intervals at positions corresponding to the ribs of the display unit side connecting member. The display unit side connection member is fitted in the recess of the mounting unit side connection member, and the rib of the display unit side connection member is locked in the groove of the recess. At this time, an attractive force or an attracting force acts between the display unit side connection member and the mounting unit side connection member due to the magnetic force of the display unit side connection member. Accordingly, the display unit side connecting member is locked to the mounting unit side connecting member, and the display unit is detachably supported by the mounting unit via the display unit side connecting member and the mounting unit side connecting member. Therefore, the display unit is disposed in front of one eye of the user in a state where the mounting unit is mounted on the observer's head. An observer grasps the display unit by hand and adjusts the position.

JP2013-74324A

  In the above HMD, the position of the display unit can be adjusted only around the axis of the mounting unit side connecting member while being mounted on the head. Further, position adjustment such as rotation around another axis or change in the relative distance between the display device and the mounting portion is not possible. Therefore, the above HMD has a problem that the position adjustment with a high degree of freedom of the display unit cannot be performed. In the above HMD, the display unit side connection member is held by the mounting unit side connection member by magnetic force. Therefore, when the position is adjusted by holding the display unit by hand, the display device may fall off the mounting unit. there were.

  If the display device and the mounting portion are screwed together, the possibility of the display device falling off the mounting portion when the position is adjusted by holding the display portion by hand can be reduced. However, in that case, there arises a problem that it takes time to attach and detach the display device and the mounting portion.

  An object of the present invention is to provide an image display device and a head-mounted display in which the display device is unlikely to drop off from the mounting portion and is easy to mount a bag or a cover.

  An image display device according to a first aspect of the present invention includes an image unit that generates image light, a first optical portion that condenses the image light generated by the image unit, and light that is collected by the first optical portion. An optical system having a second optical part for deflecting the emitted image light and emitting it to one side in the first direction, a housing for holding the image unit and the optical system, and a position of the housing in a space. An arm portion that is changeably supported; and a holding member that is provided between a portion of the arm portion and the housing and holds the housing, wherein the housing is a second member orthogonal to the first direction. A first housing surface extending in a direction and facing one side of a third direction orthogonal to the first direction and the second direction, and a second housing facing away from the first housing surface and facing the other side of the third direction A body surface and a first magnetic body portion that receives a force by magnetic force, The holding member includes a first holding surface that faces the first housing surface, a second holding surface that is separated from the first holding surface and faces the second housing surface, the first holding surface, and the second holding surface. A third holding surface that connects the surfaces and a second magnetic body portion that is provided on the third holding surface and holds the first magnetic body portion with a magnetic force.

  The first housing surface and the second housing surface of the housing can be held between the first holding surface and the second holding surface of the holding member. Further, the second magnetic body portion provided on the third holding surface attracts and holds the first magnetic body portion of the housing by magnetic force. Therefore, the housing can be securely held by the holding member, and the holding member has no screws or grooves, and the housing and the holding member can be easily attached and detached.

  In the first aspect, the housing may include a third housing surface that connects the first housing surface and the second housing surface, and the third holding surface may face the third housing surface. . In this case, since the third holding surface faces the third housing surface, the first housing surface and the second housing surface of the housing are defined by the first holding surface, the second holding surface, and the third holding surface of the holding member. And the three surfaces of the third housing surface can be held, and the housing can be securely held by the holding member.

  In the first aspect, the housing is provided on the first housing surface, and inclines toward the other side of the third direction as it is separated from the second optical portion in the second direction, A fourth housing surface opposite to the third housing surface may be further provided, and the first holding surface may be inclined in the same direction as the inclined surface portion of the first housing surface.

  Since the first holding surface is inclined in the same direction as the inclined surface portion with respect to the second holding surface, it is easy for a finger to follow and to be easily gripped and to easily align the casing.

  1st aspect WHEREIN: A top part is formed in the said 1st housing | casing surface in the start location of the said inclined surface part, and it is provided in the said 2nd direction on the opposite side to the said inclined surface part with respect to the said top part, said 1st direction And an operation member provided on the fourth housing surface, wherein one end portion of the first holding surface may coincide with the top portion.

  Since one end portion of the inner surface corresponding to the second holding surface of the first holding surface is along the top portion, the end portion on the side close to the second optical portion of the holding member is fitted to a position where it matches the top portion. Can be securely held by the holding member. In addition, since the operation member is located on the opposite side to the inclined surface portion with respect to the top portion, the operation member is held in a state where the holding member is held by hand by using one end portion along the top portion as a position reference when operating the operation member. Easy to move.

  The length between the one end portion and the other end portion in the second direction of the first holding surface may be 19 to 22 mm. Since the length between the one end portion and the other end portion of the first holding surface is 19 to 22 mm, it corresponds to the length of the contact surface of the adult index finger, and the holding member can be easily grasped with the finger.

The first magnetic body before SL is ferromagnetic, the second magnetic body may be a permanent magnet provided on the third holding surface. In this case, the casing can be securely held by attracting the first magnetic body portion of the casing with the permanent magnet provided on the third holding surface of the holding member. Moreover, since the permanent magnet is provided on the third holding surface of the holding member without providing the permanent magnet in the housing, the influence of the magnetic force of the permanent magnet on the image unit can be reduced.

A first outer surface on the opposite side of the front Symbol first holding surface, wherein the the opposite second outer surface of the second holding surface, also be slip portion extending in the first direction are respectively formed Good.

  The user holds the casing so that the finger is along the second direction during the operation. Since the front-rear distance from the eye to the housing is determined by the optical system, position adjustment mainly moves the housing in the vertical plane. Although the movement up and down can push the holding member, the movement to the left and right is performed by a frictional force between the finger and the holding member. Since the anti-slip is extended in the front-rear direction, the friction between the finger and the holding member increases during the movement to the left and right, making it difficult to slip during the movement.

Between the front Symbol holding member and the arm portion may have a ball joint is provided. With the ball joint, the degree of freedom in positioning the casing can be increased.

The shaft portion of the ball joint of the head mounted display according to the second aspect extends in the second direction on the one side in the first direction with respect to the third holding surface, and the holding member includes the first A fourth holding surface that intersects the three holding surfaces and extends to the one side in the first direction may be provided, and the ball joint may be connected to the fourth holding surface.

  Since the shaft portion of the ball joint extends in the second direction on one side in the first direction with respect to the third holding surface, and the ball joint is connected to the fourth holding surface, the structure can be made compact.

In a second aspect, said image display device, a wearable attachment to the head of the user may comprise a connecting portion for connecting the other end portion of the attachment and the arm portion. According to the 2nd aspect, there can exist an effect similar to a 1st aspect.

It is the perspective view which looked at HMD1 from the front left diagonal upper side. It is the perspective view which looked at HMD1 from back left slanting lower side. It is the perspective view which looked at HMD1 from the front right diagonal upper side. It is the perspective view which looked at HMD1 from back diagonally upward. 3 is a front view of the image display device 11. FIG. 3 is a plan view of the image display device 11. FIG. It is the perspective view which looked at the holding member 40 from the front right diagonal upper side. 3 is a front view of a holding member 40. FIG. 3 is an exploded perspective view of an internal structure of the image display device 11. FIG. It is a figure which shows the state in which the holding member 40 was hold | maintained with the thumb 57 and the index finger 58 of the user's left hand.

  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, for example, an optically transmissive see-through HMD. The light of the scenery in front of the user's eyes is directly guided to the user's eyes by passing through the half mirror 61A. The projection format of HMD1 is a virtual image projection type. The half mirror 61 </ b> A reflects the light of the image displayed on the liquid crystal panel 72 </ b> B (see FIG. 9, 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 mounting tool 8, an arm unit 9, and an image display device 11. 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 image display device 11 are defined. The upper side, the lower side, the left side, and the right side, the front side, and the rear side of the image display device 11 are, for example, the upper side, the lower side, the left diagonal lower side, the right diagonal upper side, the right diagonal lower side, and Corresponds to the upper left diagonal. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the image display device 11 are the upper side, the lower side, the right side, the left side, the front side, and the rear side, respectively, for the user wearing the wearing tool 8. Corresponding to

<Mounting tool 8>
As shown in FIGS. 1-4, the mounting tool 8 is comprised with the material which has flexibility, such as resin and metal (for example, stainless steel). The mounting tool 8 has a first portion 81 and second portions 82 and 83. Hereinafter, in order to facilitate understanding, the mounting tool 8 is described as being divided into a first part 81 and second parts 82 and 83. However, the mounting tool 8 includes the first part 81 and the second parts 82 and 83. It is not divided into each member of these, but is an integral member as a whole.

  Each of the first part 81 and the second parts 82 and 83 is a curved elongated plate-like member. The first part 81 constitutes a central part of the wearing tool 8 and extends in the left-right direction. The first portion 81 is curved in a convex shape on the front side. The second portion 82 is a portion extending to the left side of the first portion 81 in the wearing tool 8. The second portion 83 is a portion extending to the right side of the first portion 81 in the wearing tool 8. The second portions 82 and 83 each extend in a direction in which the rear ends approach each other. The wearing tool 8 is worn on the user's head with the first portion 81 and the second portions 82 and 83 in contact with the frontal, right and left heads of the user, respectively. The

<Arm part 9>
The arm portion 9 is a curved substantially rod-shaped member. The arm part 9 is made of resin or metal. The arm portion 9 extends in the vertical direction when viewed from the front. More specifically, as shown in FIG. 3, the arm portion 9 extends in a direction in which the lower end portion is inclined forward with respect to the vertical direction. The upper end portion of the arm portion 9 is connected to the mounting tool 8 via the ball joint 21 and the connection member 26. The lower end portion of the arm portion 9 is connected to a holding member 40 that holds the image display device 11 via a ball joint 22 and a fourth holding plate 44 (see FIG. 4) described later. The image display device 11 is attached to the mounting tool 8 by the arm unit 9. That is, the arm portion 9, the ball joint 21, the ball joint 22, the connection member 26, and the holding member 40 function as a connection mechanism that connects the mounting tool 8 and the image display device 11. The connection position of the ball joint 22 to the arm portion 9 is not necessarily the lower end portion, and may be lower than the center portion. Further, the connection position of the ball joint 21 to the arm portion 9 is not necessarily the upper end portion, and may be higher than the center portion. The arm unit 9 holds the image display device 11 at a position separated from the mounting tool 8. The arm unit 9 can place the half mirror 61A of the image display device 11 in front of the left eye of the user in a state where the wearing tool 8 is worn on the user's head.

<Image display device 11>
The image display device 11 will be described with reference to FIGS. 1 to 6 and 9. The image display device 11 includes a housing 3, an operation member 4, an adjustment mechanism 5 (see FIG. 9), an optical system 6 (see FIG. 9), and an image unit 7 (see FIG. 9).

<Case 3>
The housing 3 has a substantially rectangular parallelepiped shape with chamfered corners. The housing 3 has a hollow box shape. As shown in FIGS. 2 to 6, the upper surface, the lower surface, the rear surface, the front surface, and the right side surface of the housing 3 are respectively defined as a first housing surface 31, a second housing surface 32, a third housing surface 34, and a fourth housing. The body surface 33 and the fifth housing surface 35 are referred to. Note that the left side of the housing 3 is open. The first housing surface 31, the second housing surface 32, the third housing surface 34, the fourth housing surface 33, and the fifth housing surface 35 are substantially flat surfaces. The connecting portions between the housing surfaces are curved and chamfered.

<First housing surface 31>
As shown in FIG.4 and FIG.9, the 1st housing | casing surface 31 is a plate-shaped surface long bent in the left-right direction. The first housing surface 31 has an inclined surface 31A, an inclined surface 31B, and a top portion 31C. The top portion 31 </ b> C is a top portion formed at a connection portion between the inclined surface 31 </ b> A and the inclined surface 31 </ b> B, and extends in the front-rear direction of the first housing surface 31. The top portion 31 </ b> C is provided on the right side of the center in the left-right direction of the first housing surface 31. The inclined surface 31 </ b> A is a substantially flat surface and is inclined downward from the top portion 31 </ b> C toward the right end portion of the first housing surface 31. The inclined surface 31B is a substantially flat surface and is inclined downward from the top portion 31C toward the left end portion of the first housing surface 31.

<Second casing surface 32>
As shown in FIGS. 2, 4, and 5, the shape of the second housing surface 32 is vertically symmetrical with the first housing surface 31. The second housing surface 32 has an inclined surface 32A, an inclined surface 32B, and a top portion 32C. The top portion 32 </ b> C is a top portion formed at a connection portion between the inclined surface 32 </ b> A and the inclined surface 32 </ b> B, and extends in the front-rear direction of the second housing surface 32. The top portion 32 </ b> C is provided on the right side of the center in the left-right direction of the second housing surface 32. The inclined surface 32A is a substantially flat surface and is inclined upward from the top 32C toward the right end of the second housing surface 32. The inclined surface 32B is a substantially flat surface and is inclined upward from the top portion 32C toward the left end portion of the second housing surface 32.

<Fourth housing surface 33>
As shown in FIG. 5, the fourth housing surface 33 is a plate-like surface that is long in the left-right direction. The left end of the fourth housing surface 33 is formed with a substantially rectangular notch. Therefore, the length of the fourth housing surface 33 in the left-right direction is shorter than the length of the first housing surface 31 and the second housing surface 32 in the left-right direction. A half mirror 61 </ b> A is disposed behind the rectangular cutout at the left end of the fourth housing surface 33. The fourth housing surface 33 is formed with a hole 33A (see FIG. 9) penetrating in the front-rear direction, and a groove 33B (see FIG. 9) is formed around the hole 33A. An operation member 4 to be described later fits into the groove 33B from the front side. Specifically, the operation member 4 is located on the opposite side of the inclined surface 31A with respect to the top portion 31C in the left-right direction. The adjusting mechanism 5 (see FIG. 9), which will be described later, enters the hole 33A from the rear side and is connected to the rear surface of the operation member 4. The fourth housing surface 33 supports the operation member 4 to be rotatable.

<Third housing surface 34, fifth housing surface 35>
As shown in FIGS. 2, 4, and 6, the third housing surface 34 has a plate shape that is long in the left-right direction. The length of the third housing surface 34 in the left-right direction is shorter than the length of each of the first housing surface 31 and the second housing surface 32 in the left-right direction. As shown in FIG. 3, the third housing surface 34 extends in the vertical direction between the rear ends of the first housing surface 31 and the second housing surface 32. As shown in FIG. 6, the left and right positions of the left end of the third housing surface 34 and the left end of the fourth housing surface 33 are substantially the same. As shown in FIG. 4, a first magnetic body portion 34 </ b> A is provided in a portion on the right end side from the center of the third housing surface 34. As the first magnetic body portion 34A, a ferromagnetic material is used. As an example, a plate member such as iron, cobalt, nickel, an alloy thereof, or ferrite is used. In resin molding of the second housing 30B shown in FIG. 9, insert molding is performed using a plate member such as iron, cobalt, nickel, an alloy thereof, or ferrite. Further, a ferromagnetic plate may be attached to or fitted into the first magnetic body portion 34A of the third housing surface 34. Further, the entire second housing 30B may be formed of a ferromagnetic material such as iron.

  As shown in FIG. 9, the housing 3 is formed by combining a first housing 30A and a second housing 30B. The first housing 30 </ b> A includes a first housing surface 31, a second housing surface 32, a fifth housing surface 35, and a fourth housing surface 33. The second housing 30 </ b> B has a third housing surface 34. The second housing 30B is fixed to the first housing 30A with screws (not shown). As shown in FIGS. 5 and 6, a communication line 37 is drawn from the fifth housing surface 35. The HMD 1 is connected to an external device (not shown) via a communication line 37. The external device outputs image data to the HMD 1 via the communication line 37. The external device may supply power to the HMD 1 via the communication line 37.

<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 37 (see FIGS. 5 and 6). As shown in FIG. 9, 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 first member 71A and a second member 71B. The first member 71A is a hollow, substantially columnar member that extends in the left-right direction and is open on both the left and right sides. The second member 71B is a hollow, substantially quadrangular prism-shaped member that extends in the left-right direction and does not have an upper side surface and is open on both the left and right sides. The first holding member 71 is held at a fixed position with respect to the housing 3.

  The liquid crystal display device 72 includes a glass substrate 72A and a liquid crystal panel 72B. The glass substrate 72 </ b> A and the liquid crystal panel 72 </ b> B are disposed inside the second member 71 </ b> B of the first holding member 71. 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 surface. The glass substrate 72A is provided on the left side 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). A communication line 37 (see FIGS. 3 and 4) 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 37. 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.

<Optical system 6>
The optical system 6 includes a deflection unit 61 and a lens unit 62. The lens unit 62 guides the image light emitted from the image unit 7 to the half mirror 61 </ b> A of the deflection unit 61. The lens unit 62 includes a first member 62A and a second member 62B. The first member 62A is a hollow, substantially cylindrical member that is open on both the left and right sides. 62 A of 1st members are extended in the left-right direction, and have a flat surface up and down. A plurality of lenses are fixed inside the first member 62A. A first convex portion 621 that protrudes forward is provided on the front surface of the first member 62A. The 1st convex part 621 is cylindrical. The 1st convex part 621 fits in the cam groove of the adjustment mechanism 5 mentioned later. A second convex portion (not shown) that protrudes rearward is provided on the rear surface of the first member 62A. A 2nd convex part is a rod shape long in the left-right direction. The second convex portion fits into a groove 34 </ b> C provided on the front side of the third housing surface 34. The lens unit 62 is movable in the left-right direction in accordance with the movement of the second convex portion along the groove 34C.

  The second member 62B is a hollow substantially cylindrical member that is open on both the left and right sides. The second member 62B extends in the left-right direction, and has flat portions in the vertical direction. The second member 62B is provided on the right side of the first member 62A. The radius of the second member 62B is slightly smaller than the radius of the first member 71A. At least a part of the second member 62B fits inside the first member 71A of the image unit 7. The image light generated by the image unit 7 enters the second member 62B from the right side, passes through the first member 62A and the second member 62B, and exits from the left end of the first member 62A toward the left side. . The plurality of lenses collects image light incident from the right side and emits it to the left side.

  The deflection unit 61 is disposed on the left side of the lens unit 62. The deflection unit 61 includes a half mirror 61A and a holder 61B. As shown in FIG. 1, the half mirror 61A has a rectangular plate shape. The half mirror 61A 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 61A can deflect the image light that passes through the lens unit 62 and enters from the right side to the rear side. The image light deflected by the half mirror 61 </ b> A passes on the left side of the left end of the third housing surface 34. The image light is emitted from the left end of the housing 3 to the rear side. The user's eyes can visually recognize the virtual image based on the image light emitted backward from the housing 3. Further, the half mirror 61A can transmit light from the outside that is incident from the front side to the rear side. The holder 61B holds the half mirror 61A. The holder 61B is sandwiched from above and below by the lower surface of the left end portion of the first housing surface 31 of the housing 3 and the upper surface of the left end portion of the second housing surface 32.

  In the present invention, an optical path deflecting member such as a prism or a diffraction grating may be used instead of the half mirror 61A. The HMD 1 may not be an optically transmissive see-through HMD. That is, instead of the half mirror 61A, a specular reflection member (general mirror) having a transmittance of approximately 0% may be used.

<Operation member 4>
As shown in FIG. 9, the operation member 4 has a circular plate shape. One surface of the operation member 4 faces the front direction, and the other surface faces the rear direction. A central axis 4A of the operation member 4 extends in the front-rear direction. The operation member 4 is rotatable about the central axis 4A. The side surface 4B of the operation member 4 is provided with a plurality of irregularities extending in the front-rear direction. The unevenness prevents the finger from slipping on the operation member 4 when the user applies a force by bringing the finger into contact with the side surface 4B. The operation member 4 fits into a groove 33 </ b> B provided on the fourth housing surface 33 of the housing 3.

<Adjustment mechanism 5>
As shown in FIG. 9, the adjusting mechanism 5 has a circular plate shape. One surface of the adjusting mechanism 5 faces the front direction, and the other surface faces the rear direction. The adjustment mechanism 5 has a protruding portion 5A that protrudes forward from the vicinity of the center of the circle. The protruding portion 5 </ b> A enters the hole 33 </ b> A of the fourth housing surface 33 from the rear side and protrudes from the fourth housing surface 33 to the front side. The front end portion of the protruding portion 5 </ b> A is fitted in a fitting groove (not shown) on the rear surface of the operation member 4. Thereby, the operation member 4 and the adjusting mechanism 5 sandwich the fourth housing surface 33 from both the front and rear sides. The adjustment mechanism 5 can rotate integrally with the operation member 4. The operation member 4 and the adjustment mechanism 5 may be integrally formed.

  A cam groove (not shown) is provided on the rear surface of the adjusting mechanism 5. The cam groove is formed when a part of the rear surface of the adjusting mechanism 5 is recessed in the front side. The cam groove extends in a spiral shape around the circular center of the adjusting mechanism 5. The first convex portion 621 of the lens unit 62 is fitted into the cam groove from the rear. When the adjusting mechanism 5 rotates according to the rotation of the operation member 4, the cam groove applies a force to the first convex portion 621 of the lens unit 62. When the operation member 4 rotates clockwise as viewed from the front side, the lens unit 62 moves to the right side. When the operation member 4 rotates counterclockwise when viewed from the front side, the lens unit 62 moves to the left side.

<Holding member 40>
As shown in FIGS. 1 to 4, the holding member 40 is a holder that detachably holds the image display device 11. The structure of the holding member 40 will be described with reference to FIGS. 4, 7, and 8. The holding member 40 includes a first holding plate 41, a second holding plate 42, a third holding plate 43 and a fourth holding plate 44. The first holding plate 41 is a substantially rectangular plate material. An inner surface of the first holding plate 41 is a first holding surface 41B. An anti-slip portion 41 </ b> A is provided on the outer surface of the first holding plate 41. The anti-slip portion 41A has a plurality of protrusions that are formed at regular intervals and extend in the front-rear direction. The second holding plate 42 is a substantially rectangular plate material. The inner surface of the second holding plate 42 is the second holding surface 42B. An anti-slip portion 42 </ b> A is provided on the outer surface of the second holding plate 42. The anti-slip portion 42A has a plurality of protrusions that are formed at regular intervals and extend in the front-rear direction. The first holding surface 41B and the second holding surface 42B are opposed to each other with an interval (for example, an interval equal to or higher than the height in the vertical direction of the housing 3) that can hold the housing 3 therebetween. The first holding surface 41B and the second holding surface 42B are inclined.

  The third holding plate 43 connects the rear end portions of the first holding plate 41 and the second holding plate 42. An inner surface (front side shown in FIG. 7) of the third holding plate 43 is a third holding surface 43B. A second magnetic body portion 43C is provided on the third holding surface 43B. As an example, the second magnetic body portion 43C is composed of a magnet, and a permanent magnet plate such as an alnico magnet, a ferrite magnet, or a neodymium magnet is used. The second magnetic body portion 43 </ b> C may be formed by insert molding using a permanent magnet plate during resin molding of the holding member 40. In addition, a permanent magnet plate may be attached to or fitted into the third holding surface 43B.

  As shown in FIG. 4, the fourth holding plate 44 extends vertically from the outer surface of the third holding plate 43 in the rear direction. The fourth holding plate 44 is parallel to the up-down direction and the front-rear direction.

  As shown in FIGS. 4 and 7, the fourth holding plate 44 is a substantially rectangular plate-like member that intersects with the third holding plate 43 and extends in the front-rear direction. A pair of ribs 44 </ b> A and 44 </ b> A are provided at the upper and lower ends of the fourth holding plate 44. The right surface of the fourth holding plate 44 is a fourth holding surface 44B. The fourth holding surface 44B extends in the front-rear direction of the holding member 40. A socket 22A for the ball joint 22 is provided on the fourth holding surface 44B. The ball joint 22 has a ball stud 22B. The ball stud 22B has a sphere part (not shown) and a shaft part 22C (see FIG. 4) protruding from the sphere part. The socket 22A rotatably holds a sphere part (not shown) of the ball stud 22B. The shaft portion 22 </ b> C extends rightward from the socket 22 </ b> A of the ball joint 22. That is, the shaft portion 22C extends rightward on the rear side of the third holding surface 43B. The shaft portion 22 </ b> C is connected to the lower end portion of the arm portion 9.

  As shown in FIG. 8, the right end 43E of the third holding plate 43 is shorter in the vertical direction than the left end 43D. Therefore, the first holding surface 41B and the second holding surface 42B are the third holding plate. 43 incline toward the right end 43E from the left end 43D toward each other. When the holding member 40 holds the housing 3 of the image display device 11, the first holding surface 41 </ b> B of the holding member 40 abuts against the inclined surface 31 </ b> A of the housing 3. The second holding surface 42 </ b> B is opposed to and contacts the inclined surface 32 </ b> A of the housing 3. Further, the third holding surface 43 </ b> B of the third holding plate 43 of the holding member 40 is opposed to and abuts on the first magnetic body portion 34 </ b> A of the third housing surface 34 of the housing 3.

  Therefore, the interval between the first holding surface 41B and the second holding surface 42B of the holding member 40 is the same as or slightly smaller than the interval between the inclined surface 31A and the inclined surface 32A of the housing 3. In the case where the holding member 40 is made of synthetic resin or metal, the interval between the first holding surface 41B and the second holding surface 42B may be slightly smaller than the interval between the inclined surface 31A and the inclined surface 32A of the housing 3. The space | interval of the 1st holding surface 41B and the 2nd holding surface 42B spreads by the flexibility of material, and the housing | casing 3 can be hold | maintained. 8, the distance between the left end portion 41C of the first holding surface 41B and the left end portion 42C of the second holding surface 42B is the same as or slightly narrower than the distance between the top portion 31C and the top portion 32C of the housing 3. . Therefore, when the holding member 40 holds the housing 3, the left end portion 41C of the first holding surface 41B and the top portion 31C of the housing 3 coincide with each other, and the left end portion 42C of the second holding surface 42B and the housing 3 are aligned. Coincides with the top 32C. Therefore, the holding member 40 can reliably hold the housing 3.

  Further, the first magnetic body portion 34 </ b> A of the third housing surface 34 of the housing 3 is attracted by the magnetic force of the permanent magnet of the second magnetic body portion 43 </ b> C of the third holding surface 43 </ b> B of the holding member 40. Therefore, the housing 3 of the image display device 11 can be reliably held by the holding member 40.

  As shown in FIG. 8, the length L1 in the left-right direction of the left end portion 41C and the right end portion 41D of the first holding surface 41B is, for example, 19 to 22 mm. The reason will be described below. The male and female average length from the tip of the index finger to the first joint is: female: 24.5 mm, male: 27 mm (including foreigners). From this, it is considered that when the holding member 40 is gripped with a finger, the finger belly contacts the outer surface of the first holding plate 41 (the length from the tip of the index finger to the first joint—about 5 mm). If the length L1 is 19 to 22 mm, it can be reliably grasped with the index finger.

<Ball joints 21, 22, connecting member 26, and fourth holding plate 44>
As shown in FIGS. 1 and 3, the connecting member 26 includes a connecting portion 26 </ b> A and a columnar portion 26 </ b> B. 26 A of connection parts connect the connection member 26 with respect to the mounting tool 8 so that attachment or detachment is possible. The column part 26B is a columnar member. The cylindrical portion 26B protrudes in a direction away from the mounting tool 8 from a portion of the connecting portion 26A that contacts the outside of the mounting tool 8. The ball joint 21 includes a socket 21A and a ball stud 21B. The socket 21A is connected to the tip of the cylindrical portion 26B. Ball stud 21B has a sphere part (not shown) and a rod-like part protruding from the sphere part. The spherical body portion of the ball stud 21B is rotatably held by the socket 21A. The rod-shaped portion of the ball stud 21 </ b> B extends from the sphere portion in a direction away from the mounting tool 8. The tip of the rod-shaped portion of the ball stud 21 </ b> B is connected to the upper end portion of the arm portion 9.

<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 FIGS. 1 and 3) on the head. As shown in FIGS. 1 and 3, the image display device 11 is held by the holding member 40. As shown in FIG. 10, the user brings the left thumb 57 into contact with the anti-slip portion 42 </ b> A of the second holding plate 42 of the holding member 40, and the left index finger is brought into contact with the anti-slip portion 41 </ b> A of the first holding plate 41. 58 is brought into contact. More specifically, the user brings the end node portion (for example, the abdominal portion) ahead of the first joint of the thumb 57 into contact with the anti-slip portion 42A. The user makes the terminal portion (for example, the abdominal portion) ahead of the first joint of the index finger 58 contact the anti-slip portion 41A. The user adjusts the position of the image display device 11 so that the half mirror 61A (see FIG. 1) is arranged in front of the left eye.

  Output of image data is started from an external device (not shown). The image data is input to the control board 73B via the communication line 37. Based on the image data, an image is displayed on the liquid crystal panel 72B. The image light of the displayed image passes through the glass substrate 72 </ b> A and the first member 71 </ b> A to the left, and exits from the image unit 7 to the left. The image light emitted from the image unit 7 passes through a plurality of lenses of the lens unit 62 on the left side and is emitted from the lens unit 62 to the left side. The half mirror 61A reflects the image light emitted from the lens unit 62 to the rear side. The image light is incident on the left eye of the user. In addition, the half mirror 61A transmits external light incident from the front side to the rear side. Thus, the user recognizes the image display device 11 of the HMD 1 by superimposing a virtual image on the front scene.

  The user rotates the operation member 4 by bringing the middle finger of the left hand into contact with the operation member 4. The lens unit 62 moves in the left-right direction according to the rotation of the operation member 4. The distance between the plurality of lenses held by the first member 62 </ b> A of the lens unit 62 and the image unit 7 changes according to the rotation of the operation member 4. When the distance between the plurality of lenses and the image unit 7 changes, the spread angle of the image light that becomes a virtual image visually recognized by the user also changes. Therefore, the user can adjust the focus by rotating the operation member 4.

<Main functions and effects of this embodiment>
When the holding member 40 holds the housing 3, the holding surface 40 can hold the inclined surface 31 </ b> A and the inclined surface 32 </ b> A of the housing 3 with the first holding surface 41 </ b> B and the second holding surface 42 </ b> B. Further, the first magnetic body portion 34A of the housing 3 is attracted and held by a magnetic force by the second magnetic body portion 43C provided on the third holding surface 43B. Therefore, the housing 3 can be securely held by the holding member 40 and the holding member 40 has no screws or grooves, so that the housing 3 and the holding member 40 can be easily attached and detached. The HMD 1 may be desired to be protected with a disposable bag or cover in order to protect the housing 3 from foreign substances such as water and dust depending on the usage conditions. In this case, in the HMD described in Patent Document 1, it is necessary to make a hole in the bag or the cover and allow the display unit side connecting member and the mounting unit side connecting member to pass therethrough. Further, when the entire display device is wrapped in a bag and attached to the attachment part without making a hole in the bag, the bag may be damaged by the display part side connecting member to open a hole. In either case, there is a problem that foreign matter easily enters from the hole and the protective function is not sufficiently exhibited. Further, when the display device is screwed to the mounting portion, there is a problem that the bag or the cover cannot be easily mounted. However, in the present embodiment, with the above-described configuration, even when the housing 3 is covered with a disposable bag or protected by the cover, the holding member 40 can be used without forming a hole in the bag or the cover. 3 can be held. Therefore, it is easy to attach and detach disposable bags and covers from the housing 3.

  Since the third holding surface 43B faces the third housing surface 34 of the housing 3, the first housing surface of the housing 3 is formed by the first holding surface 41B, the second holding surface 42B, and the third holding surface 43B of the holding member 40. By holding the three surfaces of the body surface 31, the second housing surface 32, and the third housing surface 34, the housing 3 can be securely held by the holding member 40.

  Since the first holding surface 41B is inclined in the same direction as the inclined surface portion with respect to the second holding surface 42B, it is easy for a finger to follow and to be gripped and to easily align the housing 3.

  Since the left end 41C (see FIGS. 6 and 8) of the inner surface corresponding to the second holding surface 42B of the first holding surface 41B is along the top 31C (see FIG. 6), the left end 41C on the opening side of the holding member 40 is used. The housing 3 can be reliably held by the holding member 40 by being fitted to the position where it matches the top portion 31C. Moreover, since the operation member 4 is located on the opposite side to the inclined surface 31A with respect to the top portion 31C in the left-right direction, the left end of the holding member 40 along the top portion 31C is used as a position reference when operating the operation member 4. The operation member 4 can be easily moved while holding the holding member 40 by hand.

  As shown in FIG. 8, since the length between the left end 41C and the right end 41D of the first holding surface 41B is 19 to 22 mm, the contact surface of the adult index finger 58 is shown in FIG. It becomes the same as the length, and it is easy to grasp the holding member 40 with a finger.

  The housing 3 can be securely held by attracting the first magnetic body portion 34 </ b> A of the housing 3 by the permanent magnet of the second magnetic body portion 43 </ b> C provided on the third holding surface 43 </ b> B of the holding member 40. In addition, since the permanent magnet is provided on the third holding surface 43B of the holding member 40 without providing the casing 3 with the permanent magnet, the influence of the magnetic force of the permanent magnet on the image unit 7 can be reduced.

  During operation, the user holds the holding member 40 so that the finger is along the anti-slip portion 41 </ b> A of the first holding plate 41 and the anti-slip portion 42 </ b> A of the second holding plate 42 of the holding member 40. Since the front-rear distance from the eye to the housing is determined by the optical system, the housing 3 is moved in the vertical plane mainly for position adjustment. Although the movement up and down can push the holding member 40, the movement to the left and right is performed by a frictional force between the finger and the holding member 40. Since the anti-slip projections of the anti-slip portion 41A and the anti-slip portion 42A extend in the front-rear direction intersecting the left-right direction, the friction between the finger and the holding member 40 increases during the movement to the left and right, and is difficult to slip during the movement. Become.

  With the ball joint 22, the degree of freedom of alignment of the housing 3 can be increased. As shown in FIG. 4, the shaft portion 22C of the ball joint 22 extends rightward on the rear side with respect to the third holding surface 43B, and the ball joint 22 is formed on the fourth holding surface 44B (see FIG. 7). Since it is connected, the structure can be made compact. In addition, the degree of freedom in positioning the casing can be increased. Moreover, since the top part 31C and the top part 32C are formed in the vicinity of the operation member 4, the position of the operation member 4 is easy to guess from the position of the top part 31C and the top part 32C.

<Modification>
The present invention is not limited to the above embodiment, and various modifications can be made. In the above embodiment, the image display device 11 is held in front of the user's eyes by the wearing tool 8 and the arm unit 9. The image display device 11 may be held in front of the user's eyes by another mechanism. For example, the image display device 11 may be held in front of the user's eyes by being attached to the user's glasses, hat, headband, or the like. In the above embodiment, the deflection unit 61 is not limited to the case where the deflection unit 61 is held by a portion sandwiched between the first housing surface 31 and the second housing surface 32 of the housing 3. For example, the deflection unit 61 may be held on the left side with respect to the housing 3.

  The anti-slip portion 41A and the anti-slip portion 42A are not limited to rib-like protrusions, and a plurality of columnar protrusions may be formed, or a flat surface may be roughened to form a surface with a high coefficient of friction. Further, in consideration of the thickness of the cover attached to the housing 3, between the inclined surface 31 </ b> A of the housing 3 and the first holding surface 41 </ b> B of the holding member 40, between the inclined surface 32 </ b> A and the second holding surface 42 </ b> B. The third housing surface 34 and the third holding surface 43B may be spaced apart from each other.

<Others>
The front-rear direction is an example of the “first direction” in the present invention. The rear side is an example of “one side in the first direction” of the present invention. The front side is an example of the “other side in the first direction” of the present invention. The left-right direction is an example of the “second direction” in the present invention. The left end is an example of the “one end in the second direction” of the present invention. The right end portion is an example of the “second end portion in the second direction” of the present invention. The vertical direction is an example of the “third direction” of the present invention, and the upper side is an example of “one side of the third direction” of the present invention. The lower side is an example of the “other side in the third direction” of the present invention. The lens unit 62 of the optical system 6 is an example of the “first optical portion” in the present invention. The deflection unit 61 of the optical system 6 is an example of the “second optical portion” in the present invention. The central axis 4A is an example of the “virtual axis” in the present invention.

1 HMD
3 Housing 4 Operation member 4A Center axis 5 Adjustment mechanism 6 Optical system 7 Image unit 9 Arm unit 11 Image display device 31 First housing surface 31A Inclining surface 31B Inclining surface 32 Second housing surface 32A Inclining surface 32B Inclining surface 34 Third Case surface

Claims (9)

An image unit for generating image light;
A first optical part that condenses the image light generated by the image unit, and a second optical part that deflects the image light collected by the first optical part and emits it to one side in the first direction. An optical system having
A housing for holding the image unit and the optical system;
An arm portion that supports the position of the housing in the space so as to be changeable;
A holding member that is provided between a part of the arm portion and the casing and holds the casing;
The casing extends in a second direction orthogonal to the first direction, and faces the first casing and the first casing surface facing one side of the third direction orthogonal to the second direction;
A second housing surface that is spaced apart from the first housing surface and faces the other side of the third direction;
A first magnetic body portion that receives a force by a magnetic force,
The holding member includes a first holding surface facing the first housing surface;
A second holding surface spaced from the first holding surface and facing the second housing surface;
A third holding surface connecting the first holding surface and the second holding surface;
An image display device comprising: a second magnetic body portion provided on the third holding surface and holding the first magnetic body portion by a magnetic force. The housing includes a third housing surface connecting the first housing surface and the second housing surface,
The image display device according to claim 1, wherein the third holding surface faces the third housing surface. The housing is
An inclined surface portion that is provided on the first housing surface and is inclined toward the other side of the third direction as it is separated from the second optical portion in the second direction;
A fourth housing surface opposite to the third housing surface;
Further comprising
The image display device according to claim 2, wherein the first holding surface is inclined in the same direction as the inclined surface portion of the first housing surface. The length between the first holding in one portion to the second direction of the plane and the other end, an image display according to any one of claims 1 to 3, characterized in that the 19~22mm apparatus. The first magnetic part is a ferromagnetic substance,
Said second magnetic body, the image display apparatus according to any one of claims 1 to 4, characterized in that the said permanent magnet provided on the third holding surface. The first outer surface opposite to the first holding surface and the second outer surface opposite to the second holding surface are each formed with a non-slip portion extending in the first direction. the image display apparatus according to any one of claims 1 5. Wherein between the holding member and the arm portion, the image display apparatus according to claim 1, characterized in that the ball joint is provided 6. The shaft portion of the ball joint extends in the second direction on the one side in the first direction with respect to the third holding surface,
The holding member includes a fourth holding surface that intersects the third holding surface and extends to the one side in the first direction,
The image display device according to claim 7 , wherein the ball joint is connected to the fourth holding surface. The image display device according to any one of claims 1 to 8 ,
A wearing device that can be worn on the user's head;
A head-mounted display comprising: a connecting portion that connects the mounting tool and the other end of the arm portion.

Images