JP5699650B2 - Virtual image display device - Google Patents

Description

  The present invention relates to a virtual image display device such as a head mounted display mounted on an observer's head.

Conventionally, a virtual image display device (image display device) having an appearance like glasses and allowing an observer to observe an image formed by a display element such as an LCD (Liquid Crystal Display) as a virtual image by an optical system has been proposed. (For example, refer to Patent Document 1).
The virtual image display device described in Patent Document 1 includes a display element (LCD or the like), a projection lens (objective lens), and the like, and is fixed to the temple of the spectacle frame and to the front of the spectacle frame. A light guide plate (substrate).
The light guide plate is provided with an introduction mirror and a combiner on one end side and the other end side, respectively.
The introduction mirror reflects the image light so that the image light emitted from the display element and projected as parallel light by the projection lens is totally reflected inside the light guide plate and guided to the combiner.
The combiner reflects the image light guided by total reflection inside the light guide plate and guides it to a predetermined position (the left eye or right eye of the observer) outside the light guide plate.

JP 2006-162767 A

By the way, the virtual image display device as described above is used by various observers having different head sizes. For this reason, it is necessary to configure the virtual image display device so that it can be used by various observers.
However, in the virtual image display device described in Patent Document 1, the front of the eyeglass frame and the temple are fixed, and the distance between the pair of temples is constant. For this reason, there is a problem in that it cannot be used by various observers with different head sizes, and convenience cannot be improved.
Here, it is conceivable to employ a configuration in which the temple is rotated with respect to the front of the spectacle frame via a hinge mechanism or the like so that it can be used by various observers.
However, in the virtual image display device described in Patent Document 1, the image display unit is fixed to the temple. For this reason, when the configuration as described above is adopted, the image display unit also rotates together with the temple, and the projection lens (optical axis) and the light guide plate (introduction mirror) fixed to the front of the spectacle frame. The positional relationship is shifted, and image light cannot be guided well to the left or right eye of the observer (the observer can observe the image well).

  An object of the present invention is to provide a virtual image display device capable of improving convenience.

The virtual image display device according to the present invention includes a pair of image forming apparatuses each having a display element that emits image light, a projection lens that projects image light from the display element, and the pair of image forming apparatuses. A pair of storage members, a light guide plate that guides each image light from the pair of image forming apparatuses to an external predetermined position, and a pair of storage members via the hinge mechanisms, respectively. A pair of temples that are rotatably mounted, and one of the storage member and the temple is in contact with either the storage member or the temple when the temple is rotated. A contact member that restricts the rotation of the temple, and the contact member is moved along a first direction in which the contact member is closely separated from the other of the storage member and the temple. Position adjusting member and is provided, said position adjustment member, the first and movable along the second direction crossing the direction, the movement coupled to the contact member along said second direction The contact member is moved along the first direction in conjunction with the contact member .

Here, as described above, the contact member and the position adjustment member may be provided on any one of the storage member and the temple connected to each other via the hinge mechanism.
In the following description, for convenience of explanation, “one of the storage member and temple” is referred to as “storage member”, and “one of the storage member and temple” is referred to as “temple” (contact member and position adjustment). This will be described as a configuration in which the member is provided in the storage member.
In the present invention, the storage member is provided with a contact member that contacts the temple when the pair of temples are rotated in a direction in which the pair of temples are expanded (a direction in which one temple is separated from the other temple). Therefore, an angle at which the temple can be rotated to the maximum in the direction in which the temple is expanded (an angle formed by the temple with respect to the horizontal direction in a state in which the virtual image display device is attached to the observer and the left eye and the right eye of the observer are horizontally positioned, The opening angle of the temple is regulated by the contact member.

Further, the storage member is provided with a position adjusting member that moves the contact member along a first direction in which the contact member is separated from and close to the temple. For this reason, by moving the contact member along the first direction by the position adjusting member, the contact position between the temple and the contact member can be changed, and the opening angle of the temple can be adjusted.
Therefore, since the opening angle of the temple can be adjusted by providing the contact member and the position adjusting member, a virtual image display device that can be used by various observers with different head sizes can be configured, and convenience is improved. Can be planned.

Further, the temple is rotatably attached to a storage member in which the image forming apparatus is stored, via a hinge mechanism.
Thus, even when the temple is rotated, the image forming apparatus does not rotate together with the temple, the positional relationship between the projection lens and the light guide plate can be maintained well, and the image can be displayed to the observer. Can be observed.

In the virtual image display device of the present invention, the light guide plate is disposed facing the projection lens, and an image capturing unit that captures image light from the projection lens into the light guide plate; and an optical axis of the projection lens A pair of total reflection surfaces that are formed in a flat shape orthogonal to each other and parallel to each other, and image light captured inside the light guide plate is separated from the image capturing unit by total reflection at the pair of total reflection surfaces It is preferable to include a total reflection part that guides the image light guided in the direction in which the image light is guided and an image extraction part that guides the image light guided by the total reflection part to the predetermined position outside.
In the present invention, since the light guide plate includes the above-described image capturing unit, total reflection unit, and image extracting unit, it is possible to allow an observer to observe an external image in addition to the image formed on the display element. Type virtual image display device can be configured.

In the virtual image display device of the present invention is either before Symbol housing member and said temple has a sliding surface extending along the second direction, said position adjusting member on said sliding surface It is preferable that a guide member for guiding the movement of the position adjusting member along the second direction by sliding is provided.

In the present invention, the contact member and the position adjustment member move along the first direction and the second direction that intersect each other. And the guide member which has the sliding surface mentioned above is provided in the storage member.
Thus, when the temple is rotated in the direction of expanding and the contact member is pressed by the temple, the position adjusting member can be pressed against the sliding surface in accordance with the pressing of the contact member. Since the sliding surface extends along the second direction intersecting the first direction in which the contact member is pressed, the position adjusting member is caught on the sliding surface, and the pressing of the contact member Accordingly, it is possible to prevent the position adjusting member from moving along the second direction.
Therefore, after changing the contact position between the contact member and the temple by the position adjusting member and setting the opening angle of the temple to a desired angle, the desired angle can be maintained well, and the convenience can be further improved. .

  In the virtual image display device of the present invention, the hinge mechanism includes a rotation shaft that rotates the temple with respect to the storage member, a support portion that is provided on the storage member and supports the rotation shaft, and the temple. An insertion hole through which the rotation shaft is inserted, a shaft support portion rotatably supported by the rotation shaft, and a bridge extending between the rotation shaft and the temple. A biasing member that biases in a direction close to the rotation shaft, and the insertion hole passes through a contact position between the contact member, the storage member, and the temple, and the rotation shaft. It is preferable that the track hole is formed by a track hole extending in the rotation direction around a virtual second axis parallel to the axis.

In the present invention, since the hinge mechanism is configured as described above, when the virtual image display device is mounted on the observer, the temple is applied to the observer's head with a predetermined force by the urging force of the urging member. Can be pressed down. That is, it is possible to improve the feeling of wearing the virtual image display device by the observer by fitting the temple to the observer's head.
Further, if the contact position between the temple and the contact member is changed by the position adjusting member, the force with which the temple is pressed against the head of the observer can be adjusted. That is, the pressing force can be adjusted by the observer himself, and the convenience can be further improved.

In the virtual image display device according to the aspect of the invention, it is preferable that a contact surface of the contact member with either the storage member or the temple is formed in a convex curved surface shape.
In the present invention, since the contact surface of the contact member with the temple is formed in a convex curved surface, the temple can be favorably rotated around the second axis.

The perspective view which shows the external appearance of the virtual image display apparatus in this embodiment. The disassembled perspective view which shows the structure of the virtual image display apparatus in this embodiment. The perspective view which shows the internal structure of the virtual image display apparatus in this embodiment. It is a figure which shows the structure of the light-guide plate in this embodiment, and is the figure which looked at the light-guide plate from the + Z-axis side. It is a figure which shows the structure of the light-guide plate in this embodiment, and is the figure which looked at the light-guide plate from the downward side along a Y-axis. The disassembled perspective view which shows the structure of the hinge mechanism in this embodiment. It is a figure for demonstrating the function of the biasing member in this embodiment, and is a figure which shows the state of the biasing member when the 1st, 2nd contact part mutually contact | abuts. It is a figure for demonstrating the function of the biasing member in this embodiment, and is the biasing member at the time of rotating in the direction which expands a temple further from the state which the 1st, 2nd contact part contact | abutted mutually. FIG. The figure for demonstrating the structure of the adjustment mechanism in this embodiment. It is a figure for demonstrating the structure of the adjustment mechanism in this embodiment, and the figure which the 1st contact part moved to the + Z-axis side. It is a figure for demonstrating the structure of the adjustment mechanism in this embodiment, and the figure which the 1st contact part moved to the -Z-axis side. It is a figure for demonstrating the structure of the adjustment mechanism in this embodiment, in the state which rotated to the direction which expands a temple centering on a rotating shaft, and made the 2nd contact part contact the 1st contact part. The figure which shows the opening angle | corner of a temple. The figure which looked at the state which the 1st, 2nd contact part contacted in Drawing 9 (A) from the upper part side. It is a figure for demonstrating the structure of the adjustment mechanism in this embodiment, in the state which rotated to the direction which expands a temple centering on a rotating shaft, and made the 2nd contact part contact the 1st contact part. The figure which shows the opening angle | corner of a temple. The figure which looked at the state which the 1st, 2nd contact part contacted in Drawing 10 (A) from the upper part side.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[1. Configuration of virtual image display device]
FIG. 1 is a perspective view showing an appearance of the virtual image display device 1.
FIG. 2 is an exploded perspective view showing the configuration of the virtual image display device 1.
FIG. 3 is a perspective view showing an internal configuration of the virtual image display device 1.
1 to 3, for convenience of explanation, an axis parallel to an optical axis Ax (FIG. 2) of a projection lens 81 (to be described later) is taken as a Z axis, and a horizontal axis orthogonal to the Z axis is taken as an X axis and a Z axis. An orthogonal vertical axis is defined as a Y axis. The same applies to the subsequent figures. In the Z axis, the observer side is defined as the -Z axis side, and the side away from the observer is defined as the + Z axis side.
1 to 3 are views seen from the −Z-axis side. 2 and 3 show only the side corresponding to the left eye of the observer for convenience of explanation.

As shown in FIGS. 1 to 3, the virtual image display device 1 is a head-mounted display having an appearance like glasses, and allows an observer wearing the virtual image display device 1 to recognize image light based on a virtual image. In addition, the virtual image display device 1 of the present embodiment is configured by a see-through type virtual image display device that allows an external image to be observed through.
As shown in FIGS. 1 to 3, the virtual image display device 1 includes an image forming device 2 (FIGS. 2 and 3), a light guide plate 3, a rim 4, a cover 5 as a storage member, and a temple 6. Is provided.
As shown in FIGS. 1 to 3, the image forming apparatus 2, the light guide plate 3, the cover 5, and the temple 6 are provided as a pair corresponding to the left eye and the right eye of the observer wearing the virtual image display apparatus 1. , Are arranged symmetrically (left-right symmetric) with reference to the YZ plane.
Since the pair of image forming apparatuses 2, the pair of light guide plates 3, the pair of covers 5, and the pair of temples 6 have the same configuration on the left and right, only the side corresponding to the left eye of the observer will be described below. Will be explained.

[2. Configuration of image forming apparatus]
The image forming apparatus 2 is a member that forms and projects image light, and includes a display element 7 and a projection optical device 8 as shown in FIG. 2 or FIG.
As shown in FIG. 2 or 3, the display element 7 is attached to the light incident side of the liquid crystal display device 71 and a transmissive liquid crystal display device 71 that modulates incident light to form image light. The backlight 72 (FIG. 2) which radiate | emits light with respect to the device 71 is provided.
As shown in FIG. 2 or FIG. 3, the projection optical device 8 includes a projection lens 81 (FIG. 2) that projects image light emitted from the display element 7 as parallel light, and a lens barrel that houses the projection lens 81 therein. 82.
As shown in FIG. 2 or FIG. 3, the display element 7 is fixed to the end surface on the −Z-axis side of the lens barrel 82 via the attachment member 7A.
In addition, the image forming apparatus 2 in which the members 7 and 8 are integrated is fixed to the rim 4 via a lens barrel 82 as shown in FIG.

[3. Configuration of light guide plate]
FIG. 4 is a diagram illustrating a configuration of the light guide plate 3. Specifically, FIG. 4A is a view of the light guide plate 3 viewed from the + Z axis side, and FIG. 4B is a view of the light guide plate 3 viewed from the lower side along the Y axis.
The light guide plate 3 is made of a light-transmitting resin material or the like, takes the image light projected from the image forming apparatus 2 inside, and then guides it to a predetermined external position (the left eye or the right eye of the observer).
As shown in FIG. 2 or 4, the light guide plate 3 includes an image capturing unit 31, a total reflection unit 32, and an image extracting unit 33 that are integrally formed, and is viewed from a direction along the Y axis. In the case of a substantially isosceles trapezoid.
As shown in FIG. 2 or FIG. 4, the image capture unit 31 is formed in a substantially triangular prism shape extending along the Y axis, and on the side away from the other light guide plate 3 in the assembled state of the virtual image display device 1. Positioned.
The image capturing unit 31 is disposed facing the projection optical device 8 in a state where the virtual image display device 1 is assembled, and captures the image light projected from the projection optical device 8 into the light guide plate 3.

As shown in FIG. 4, a light incident surface 311 and a first reflecting surface 312 are formed on the outer surface of the image capturing unit 31.
The light incident surface 311 is formed in a flat shape parallel to the XY plane, and is a surface on which image light projected from the projection lens 81 is incident to face the projection lens 81.
The first reflecting surface 312 is formed by forming a film such as aluminum vapor deposition on a flat inclined surface facing the light incident surface 311 and inclined with respect to the XY plane, and captures an image via the light incident surface 311. The image light taken into the part 31 is reflected toward the total reflection part 32.

As shown in FIG. 2 or 4, the total reflection portion 32 has a rectangular plate shape extending along the XY plane, and is integrally formed with the image capturing portion 31.
As shown in FIG. 4, the total reflection unit 32 includes first and second total reflection surfaces 321 and 322, and the image light reflected by the first reflection surface 312 is first and second total reflection. The light is guided in a direction away from the image capturing unit 31 (side closer to the other light guide plate 3) by total reflection on the surfaces 321 and 322.
The first total reflection surface 321 is configured by a plane obtained by extending the light incident surface 311 (parallel to the XY plane (perpendicular to the optical axis Ax)), and is located on the −Z axis side.
The second total reflection surface 322 is formed in a flat shape parallel to the first total reflection surface 321 and is located on the + Z axis side.
The first and second total reflection surfaces 321 and 322 are not limited to those in which image light is totally reflected and guided by the interface with the air without providing a mirror or a half mirror on the surface. 2 It also includes reflection that is formed by forming a mirror coat or a half mirror film on the whole or a part of the total reflection surfaces 321 and 322. For example, after the incident angle of the image light satisfies the total reflection condition, all or part of the first and second total reflection surfaces 321 and 322 are mirror coated to reflect substantially all the image light. The case of making it include is also included. Moreover, as long as image light with sufficient brightness can be obtained, the whole or part of the first and second total reflection surfaces 321 and 322 may be coated with a somewhat transmissive mirror.

As shown in FIG. 2 or FIG. 4, the image extraction unit 33 has a substantially triangular prism shape extending along the Y axis similar to the image acquisition unit 31, is integrally formed with the total reflection unit 32, and is a virtual image display device 1. In the assembled state, it is positioned on the side close to the other light guide plate 3.
Then, the image extraction unit 33 guides the image light guided to the total reflection unit 32 to a predetermined external position (the left eye or the right eye of the observer) by reflection.
As shown in FIG. 4, a light emitting surface 331 and a second reflecting surface 332 are formed on the outer surface of the image extraction portion 33.

The light emitting surface 331 is configured by a plane obtained by extending the first total reflection surface 321.
The second reflecting surface 332 is formed in a flat shape that faces the light emitting surface 331 and is inclined with respect to the XY plane. The image light guided by the total reflection unit 32 is reflected to a predetermined external position (of the observer). (Left eye or right eye).
The second reflecting surface 332 is configured by a half mirror or the like, and is configured to reflect image light and transmit an external image.
The image extraction unit 33 is not limited to the second reflection surface 332 such as a half mirror as long as it has a function of guiding the image light guided by the total reflection unit 32 to a predetermined external position. A splitter, a hologram diffraction grating, or the like may be employed.

[4. Rim configuration)
The rim 4 is made of a light-transmissive resin material or the like, has a symmetrical shape, and holds the pair of light guide plates 3 in a state where the image extraction portions 33 of the pair of light guide plates 3 are close to each other. (Integrate).
As shown in FIG. 2, the rim 4 is formed by integrally forming an upper frame portion 41, a pair of lower frame portions 42, and a construction portion 43.
The upper frame portion 41 is a member having a substantially rectangular cross section extending along the X axis, and supports the upper side of the pair of light guide plates 3.
The pair of lower frame portions 42 are members having a substantially rectangular cross section extending along the X axis, and are disposed on the lower side with respect to the upper frame portion 41 and are arranged in parallel along the X axis. The lower side of the light guide plate 3 is supported.
In addition, the image forming apparatus 2 in which the members 7 and 8 are integrated is fixed to the upper frame portion 41 and the lower frame portion 42 via a lens barrel 82.

The erection part 43 is located in the central portion of the rim 4 and is erected between the upper frame part 41 and the pair of lower frame parts 42.
As shown in FIGS. 1 to 3, the erection portion 43 has a notch portion 431 that is notched in a substantially arc shape when viewed from the direction along the Z axis from between the pair of lower frame portions 42 to the upper side. Is formed.
The notch 431 is detachably attached with a nose pad 431A (FIG. 1) that comes into contact with the nose of the observer while the virtual image display device 1 is attached to the observer.
In addition, slopes 432 corresponding to the respective second reflecting surfaces 332 of the pair of light guide plates 3 are respectively formed at the left and right ends on the −Z-axis side of the installation portion 43 as shown in FIG.
The light guide plate 3 is fitted so as to fill a U-shaped inner portion surrounded by the upper frame portion 41, the lower frame portion 42, and the installation portion 43, and the upper frame portion 41, the lower frame portion 42, and the slope 432. Are bonded to each other via an adhesive.

[5. Cover configuration)
As shown in FIGS. 1 to 3, the cover 5 includes a first cover portion 5 </ b> A located on the side away from the other cover 5 and a second cover portion 5 </ b> B located on the side close to the other cover 5. It is configured by combining, and the inside has an overall substantially rectangular parallelepiped shape extending along the hollow Z axis.
The cover 5 is fixed to the upper frame portion 41 and the lower frame portion 42 of the rim 4, and the image forming apparatus 2, a part of the light guide plate 3 (image capturing part 31), and a part of the rim 4 (upper part) The frame portion 41 and the lower frame portion 42 are covered.
In the cover 5, a first mounting hole 51 that communicates between the inside and the outside is formed at a substantially central portion in the direction along the Y axis at the end on the −Z axis side, as shown in FIGS. 1 to 3. .

[6. Temple structure)
As shown in FIGS. 1 to 3, the temple 6 includes a first temple portion 6 </ b> A located on the side away from the other temple 6 and a second temple portion 6 </ b> B located on the side close to the other temple 6. It is configured by combining, and the inside is hollow and has a shape extending in a curve.
The temple 6 is attached so that one end side (the end on the + Z-axis side) is rotatable with respect to the cover 5 via a hinge mechanism 10 described later, and the virtual image display device 1 is attached to the observer. , Locked to the observer's ear.
The temple 6 of the present embodiment has a −Z axis from one end side to the other end side in the state shown in FIG. 1 (a state where a first contact portion 21 described later has moved to the + Z axis side as much as possible). While extending to the side, it bends gently to the lower side and bends gently to the side adjacent to the other temple 6.
That is, the temple 6 has a shape that follows the head of the observer when the virtual image display device 1 is attached to the observer.

In addition, in the temple 6, a substantially central portion in the direction along the Y-axis on one end side corresponds to the first mounting hole 51 of the cover 5 as shown in FIG. A hole 61 is formed.
The second mounting hole 61 is configured by combining the first and second temple portions 6A and 6B. In FIG. 3, the second mounting hole 61 formed in the first temple portion 6A. Only a part of is shown.

[7. (Configuration of hinge mechanism)
FIG. 5 is an exploded perspective view showing the configuration of the hinge mechanism 10.
As shown in FIG. 3 or 5, the hinge mechanism 10 includes a rotation shaft 11 (FIG. 3), a pair of support portions 12, a pair of shaft support portions 13, and an urging member 14 (FIG. 3). .
As shown in FIG. 3, the rotation shaft 11 is formed in a columnar shape and is a shaft that rotates the temple 6 with respect to the cover 5.
As shown in FIG. 3 or FIG. 5, the pair of support portions 12 is provided on the cover 5.
Specifically, the pair of support portions 12 are formed in a plate shape projecting toward the inside of the cover 5 so as to be parallel to the XZ plane from the edge portion of the first mounting hole 51 in the cover 5, and the Y axis Are arranged side by side.

Further, as shown in FIG. 5, support holes 121 for supporting the rotating shaft 11 are respectively formed in the pair of support portions 12.
The pair of support portions 12 (support holes 121) are configured by combining the first and second cover portions 5A and 5B, and are formed in the first cover portion 5A in FIG. 3 or FIG. Only a part of the pair of support portions 12 (support holes 121) is shown.
And a pair of support part 12 supports the rotating shaft 11 in the state in alignment with the Y-axis in each hole 121 for support.
Here, in the first cover portion 5A, between the pair of support portions 12, as shown in FIG. 5, a first contact portion 21 constituting an adjustment mechanism 20 described later is disposed.
The specific configuration of the adjustment mechanism 20 will be described later.

As shown in FIG. 3 or FIG. 5, the pair of shaft support portions 13 is provided on the temple 6.
Specifically, the pair of shaft support portions 13 are formed in a substantially disc shape that protrudes outward from the edge portion of the second mounting hole 61 so as to be parallel to the XZ plane in the first temple portion 6A. Along the Y axis.
Here, the separation dimension of the pair of shaft support portions 13 is set smaller than the separation dimension of the pair of support portions 12.
The pair of shaft support portions 13 are disposed between the pair of support portions 12 through the first attachment holes 51 in a state where the temple 6 is attached to the cover 5.

Further, as shown in FIG. 5, the pair of shaft support portions 13 are formed with insertion holes 131 through which the rotation shaft 11 is inserted.
These insertion holes 131 are in contact with the contact surface 21A (first contact portion 21 and second contact portion 132 (described later) in the first contact portion 21 in a state where the temple 6 is attached to the cover 5. ) And a track hole extending along a rotation direction around a virtual second axis VA (see FIG. 6) parallel to the Y axis.

The temple 6 is attached to the cover 5 via the hinge mechanism 10 described above, so that the temple 6 extends around the rotation shaft 11 (axis along the Y axis) (a direction away from the other temple 6) and It will rotate in the direction of narrowing (direction approaching the other temple 6).
Here, in the temple 6, as shown in FIG. 5, the pair of shaft support portions 13 includes a second contact portion on the side away from the other temple 6 with respect to the insertion hole 131 when viewed from the direction along the Y axis. 132 are formed.
The second contact portion 132 is a portion that protrudes from the outer edge of the shaft support portion 13 and contacts the first contact portion 21 (contact surface 21A) when the temple 6 is rotated in the direction in which the temple 6 is expanded.

FIG. 6 is a diagram for explaining the function of the urging member 14. Specifically, FIG. 6 is a cross-sectional view of the hinge mechanism 10 cut along the XZ plane. FIG. 6A is a view showing a state of the urging member 14 when the first and second contact portions 21 and 132 are in contact with each other, and FIG. It is a figure which shows the state of the urging | biasing member 14 at the time of rotating in the direction which further expands the temple 6 from the state which the contact parts 21 and 132 contact | abutted mutually.
As shown in FIG. 3 or FIG. 6, the urging member 14 is constituted by a tension coil spring, and one end and the other end are respectively attached to the rotating shaft 11 and the first temple portion 6 </ b> A, and the temple 6 is attached to the rotating shaft 11. Energize in the approaching direction (direction in which the temple 6 is narrowed).

By using the urging member 14 described above, the temple 6 rotates as shown below.
That is, when the temple 6 rotates in the direction of expanding around the rotation shaft 11, the second contact portion 132 contacts the first contact portion 21 (FIG. 6A).
When the temple 6 is pressed in the expanding direction from the state shown in FIG. 6A, the position of the rotating shaft 11 in the insertion hole 131 is changed against the urging force by the urging member 14. Rotating about the second axis VA.
Therefore, the temple 6 exerts a predetermined force on the observer's head by the urging force of the urging member 14 when the virtual image display device 1 is attached to the observer.

[8. (Adjustment mechanism configuration)
7 to 10 are diagrams for explaining the configuration of the adjusting mechanism 20. Specifically, FIG. 7 is a perspective view of the state in which the adjustment mechanism 20 is attached to the inner surface of the first cover portion 5 </ b> A as viewed from the side close to the other cover 5. FIG. 8 schematically shows the configuration of the adjustment mechanism 20 and is a view of the adjustment mechanism 20 as viewed from the side away from the other cover 5. 9A and 10A show a state in which the temple 6 is rotated about the rotation shaft 11 in a direction in which the temple 6 is expanded and the second contact portion 132 is brought into contact with the first contact portion 21. It is a figure which shows the opening angle (theta) of this temple 6. FIG. FIGS. 9B and 10B are views of the contact state of the first and second contact portions 21 and 132 in FIGS. 9A and 10A as viewed from above. is there.

The adjustment mechanism 20 is a mechanism for adjusting the opening angle θ of the temple 6.
The opening angle θ of the temple 6 is an angle at which the temple 6 can be rotated to the maximum in the direction in which the temple 6 is expanded around the rotation shaft 11. For example, as illustrated in FIG. It can be defined as an angle θ of a straight line L) connecting the moving shaft 11 and the other end of the temple 6.
7 to 10, the adjustment mechanism 20 includes a first contact portion 21 as a contact member, an adjustment lever 22 (FIGS. 7 and 8) as a position adjustment member, and a guide member 23 ( 7 and 8).

As shown in FIGS. 5 to 10, the first abutment portion 21 is formed in a substantially rectangular plate shape extending along the YZ plane, and between the pair of support portions 12, each support portion 12 is attached to the Y axis. While being restricted from moving in the direction along, the first direction D1 (direction approaching and separating from the temple 6, FIGS. 5 and 7 to 10) is movably disposed.
In the present embodiment, the first direction D1 is set to be parallel to the Z axis.
As shown in FIG. 6, in the first contact portion 21, the end portion on the −Z axis side is convex toward the −Z axis side when viewed from the direction along the Y axis, and has a substantially circular cross section along the X axis. It is formed in the convex curved surface shape which comprises.
The convex curved surface corresponds to the contact surface 21A (FIGS. 5 to 10) according to the present invention.
Moreover, in this 1st contact part 21, the plate | board surface of the side close | similar to the other cover 5 has a cylindrical shape which protrudes toward the exterior, as shown in FIG. 5, FIG. 8 thru | or FIG. A pair of projecting portions 211 arranged in parallel along the Y axis is formed.

The adjustment lever 22 is a lever operated by the observer, and moves along the second direction D2 (FIG. 8) intersecting the first direction D1 by being operated by the observer. The first contact portion 21 is interlocked with the movement along the direction D2 and moved along the first direction D1.
The adjustment lever 22 includes an operation unit 221 and a coupling unit 222 (FIG. 8), is located on the + Z-axis side with respect to the pair of support units 12, and is on the other side with respect to the first contact unit 21. It is disposed on the side close to the cover 5.
Here, in the first cover portion 5A, the side wall portion 52 on the lower side with respect to the first mounting hole 51 is inclined by approximately 45 ° with respect to the XY plane as shown in FIG. 7 or FIG. It inclines along the 2nd direction D2 which goes to a downward side as it goes to the + Z-axis side from an axial side.
In other words, in the present embodiment, the first and second directions D1 and D2 intersect to form approximately 45 °.
In the side wall portion 52, an operation hole (not shown) extending along the second direction D2 is formed.

As shown in FIG. 8, the operation portion 221 protrudes from a rectangular plate-like slide portion 221 </ b> A that slides on the inner surface of the side wall portion 52 and the plate surface of the slide portion 221 </ b> A, and covers the operation hole. 5 is provided with an operation knob 221B exposed to the outside.
As shown in FIG. 8, the connecting portion 222 is a portion that is connected to the first abutting portion 21, is formed in a plate shape that extends along the YZ plane, and one end of the plate surface of the sliding portion 221 </ b> A. It has a shape that is connected to a substantially central portion, is inclined obliquely upward from the one end side to the other end side, and is bent upward along the Y axis.
As shown in FIG. 8, the connection portion 222 is formed with a pair of connection holes 222 </ b> A through which the pair of protrusions 211 in the first contact portion 21 are inserted.
The pair of connecting holes 222A are constituted by track holes extending along the Y axis, and are arranged side by side along the Y axis.

The guide member 23 is formed in a plate shape extending along the YZ plane and is attached to the inner surface of the first cover portion 5A, so that the first contact portion 21 and the adjustment between the inner surface of the first cover portion 5A and the guide member 23 are adjusted. The lever 22 is movably clamped.
In the guide member 23, on the plate surface facing the connecting portion 222, as shown in FIG. 8, the upper side and the −Z axis side communicate with the side end portion of the guide member 23, and the connecting portion 222 is disposed. A recess 231 is formed.
A part of the side wall of the recess 231 is formed so as to correspond to the outer shape of the end portion on the + Z-axis side of the connecting portion 222 as shown in FIG.
A part of the side wall abuts on the adjustment lever 22 when the adjustment lever 22 moves toward the + Z-axis side along the second direction D2, and functions as a first restriction surface 231A that restricts the movement of the adjustment lever 22. To do.

Moreover, as shown in FIG. 8, the upper side of the side wall in the recess 231 is formed along the second direction D2.
The upper side of the side wall functions as a sliding surface 231B on which the connecting portion 222 slides when the adjustment lever 22 moves along the second direction D2.
Further, in the guide member 23, a part of the lower end is formed so as to incline along the second direction D2, as shown in FIG.
A part of the lower end can move the sliding part 221A between the side wall part 52 of the first cover part 5A and the guide member 23 attached to the inner surface of the first cover part 5A. It functions as a second restriction surface 232 sandwiched between the two.

When the operation knob 221B is operated by the observer and the adjustment lever 22 moves to the + Z-axis side along the second direction D2 while sliding on the sliding surface 231B, each connection hole 222A. Each of the protrusions 211 is guided by the first contact portion 21 in conjunction with the movement of the adjustment lever 22 and moves to the + Z-axis side.
FIG. 8A shows a state in which the connecting portion 222 is in contact with the first restriction surface 231A and the first contact portion 21 is moved to the + Z axis side as much as possible.
Then, the first abutting portion 21 is moved to the + Z-axis side as much as possible, and as shown in FIG. 9, the first abutting portion 21 is rotated in the direction in which the temple 6 is expanded around the rotating shaft 11. When the two contact portions 132 are contacted, the opening angle θ1 of the temple 6 is a relatively large angle.

On the other hand, when the operation knob 221B is operated by the observer and the adjustment lever 22 moves to the −Z axis side along the second direction D2 while sliding on the sliding surface 231B, Each protrusion 211 is guided by the connecting hole 222A, and the first abutting portion 21 moves to the −Z-axis side in conjunction with the movement of the adjustment lever 22.
FIG. 8B shows a state in which the connecting portion 222 is in contact with the edge portion of the operation hole of the side wall portion 52 and the first contact portion 21 is moved to the −Z axis side as much as possible.
Then, the first contact portion 21 is moved to the −Z-axis side as much as possible, and as shown in FIG. 10, the first contact portion 21 is rotated in the direction of expanding the temple 6 around the rotation shaft 11. When the second contact portion 132 is contacted, the opening angle θ2 of the temple 6 is smaller than the opening angle θ1 of the temple 6.
As described above, when the operation knob 221B is operated by the observer and the adjustment lever 22 is moved to an appropriate position, the opening angle of the temple 6 is adjusted in the range of the angle θ1 to the angle θ2.

According to this embodiment described above, the following effects are obtained.
In the present embodiment, the cover 5 has a first contact portion 21 that contacts the temple 6 (second contact portion 132) when the cover 6 is rotated in the direction in which the temple 6 is expanded around the rotation shaft 11. Is provided.
For this reason, the opening angle θ of the temple 6 is regulated by the first contact portion 21.
The cover 5 is provided with an adjustment lever 22 that moves the first contact portion 21 along the first direction D1. Therefore, by moving the first contact portion 21 along the first direction D1 by the adjustment lever 22, the contact positions of the first and second contact portions 21 and 132 are changed, and the temple 6 is opened. The angle θ can be adjusted.
Therefore, since the opening angle θ of the temple 6 can be adjusted by providing the first contact portion 21 and the adjustment lever 22, the virtual image display device 1 that can be used by various observers having different head sizes can be configured. It is possible to improve convenience.

Further, the temple 6 is attached to a cover 5 in which the image forming apparatus 2 is housed, via a hinge mechanism 10 so as to be rotatable.
Thus, even when the temple 6 is rotated, the image forming apparatus 2 does not rotate together with the temple 6, and the projection lens 81 (optical axis Ax) and the light guide plate 3 (first reflecting surface 312). ) Can be maintained well, and the observer can observe the image well.

  Furthermore, since the light guide plate 3 includes the image capturing unit 31, the total reflection unit 32, and the image extracting unit 33, it is possible to make the observer observe an external image in addition to the image formed on the display element 7, The see-through type virtual image display device 1 can be configured.

The first contact portion 21 and the adjusting lever 22 move along first and second directions D1 and D2 that intersect each other. The cover 5 is provided with a guide member 23 having a sliding surface 231B.
Accordingly, when the temple 6 is rotated in the expanding direction and the first contact portion 21 is pressed by the second contact portion 132, the adjustment lever 22 according to the pressing of the first contact portion 21. (Connecting part 222) can be pressed against sliding surface 231B. Since the sliding surface 231B extends along the second direction D2 intersecting the first direction D1 in which the first contact portion 21 is pressed, the connecting portion 222 is caught on the sliding surface 231B. Thus, the adjustment lever 22 can be prevented from moving along the second direction D2 in response to the pressing of the first contact portion 21.
Therefore, after changing the contact position of the first and second contact portions 21 and 132 by the adjusting lever 22 and setting the opening angle θ of the temple 6 to a desired angle, the desired angle can be maintained well, The convenience can be further improved.

Further, since the hinge mechanism 10 is configured as described above, when the virtual image display device 1 is mounted on the observer, the temple 6 is attached to the observer's head by the urging force of the urging member 14. Can be pressed with force. That is, it is possible to improve the feeling of wearing the virtual image display device 1 by the observer by fitting the temple to the observer's head.
Moreover, if the contact position of the 1st, 2nd contact parts 21 and 132 is changed with the adjustment lever 22, the force which the temple 6 presses against an observer's head can also be adjusted. That is, the pressing force can be adjusted by the observer himself, and the convenience can be further improved.
Furthermore, since the contact surface 21A of the first contact portion 21 is formed in a convex curved surface, the temple 6 can be favorably rotated around the second axis VA.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, the virtual image display device 1 employs the transmissive liquid crystal display device 71. However, the present invention is not limited to this, and other configurations such as a reflective liquid crystal display device and a digital micromirror device are possible. Etc. may be adopted.
In the embodiment, the adjustment mechanism 20 is provided on the cover 5, but the configuration is not limited thereto, and a configuration provided on the temple 6 may be employed.
In the embodiment, the first and second directions D1 and D2 are set to intersect at approximately 45 °, but the intersecting angle is not limited to 45 ° and may be other angles.
In the above embodiment, the hinge mechanism 10 includes the urging member 14 and is configured to press the temple 6 against the observer's head with a predetermined force by the urging force of the urging member 14. Not limited to. For example, the temple 6 may be configured by a member having elasticity in advance, and the temple 6 may be configured to be pressed against the observer's head with a predetermined force by the elastic force of the temple 6 itself.

  The present invention can be used for a virtual image display device such as a head mounted display.

  DESCRIPTION OF SYMBOLS 1 ... Virtual image display apparatus, 2 ... Image forming apparatus, 3 ... Light guide plate, 5 ... Cover (housing member), 6 ... Temple, 7 ... Display element, 11 ... Rotating shaft, 12... Support portion, 13... Pivot support portion, 14... Biasing member, 21... First contact portion (contact member), 21 A. ... Adjusting lever (position adjusting member), 23 ... Guide member, 31 ... Image capturing part, 32 ... Total reflection part, 33 ... Image extracting part, 81 ... Projection lens, 131 ... insertion hole (track hole), 231B ... sliding surface, 321 ... first total reflection surface, 322 ... second total reflection surface, D1 ... first direction, D2 · .. Second direction, VA ... second axis.

Claims (5)

A pair of image forming apparatuses having a display element that emits image light, and a projection lens that projects image light from the display element;
A pair of storage members in which the pair of image forming apparatuses are respectively stored;
A light guide plate that guides each image light from the pair of image forming apparatuses to a predetermined position outside after being taken inside,
A pair of temples rotatably attached to the pair of storage members via the hinge mechanisms,
One of the storage member and the temple has
A contact member that contacts the other of the storage member and the temple when the temple is rotated and restricts the rotation of the temple;
A position adjusting member for moving the contact member along a first direction in which the contact member is closely separated from the other of the storage member and the temple ;
The position adjusting member is movable along a second direction intersecting the first direction, and is coupled to the abutting member so that the abutting member is interlocked with the movement along the second direction. A virtual image display device which is moved along the first direction . The virtual image display device according to claim 1,
The light guide plate is
An image capturing unit that is disposed to face the projection lens and captures image light from the projection lens into the light guide plate;
It has a pair of total reflection surfaces formed in a flat shape orthogonal to the optical axis of the projection lens and parallel to each other, and the image light taken into the light guide plate is reflected by the total reflection on the pair of total reflection surfaces. A total reflection portion that leads in a direction away from the image capturing portion;
A virtual image display device comprising: an image extraction unit that guides the image light guided by the total reflection unit to the predetermined external position. The virtual image display device according to claim 1 or 2,
While the either before Symbol housing member and said temple,
A guide having a sliding surface extending along the second direction and guiding the movement of the position adjusting member along the second direction by sliding the position adjusting member on the sliding surface. A virtual image display device comprising a member. In the virtual image display device according to any one of claims 1 to 3,
The hinge mechanism is
A rotation shaft for rotating the temple with respect to the storage member;
A support portion provided on the storage member and supporting the pivot shaft;
A shaft support portion provided in the temple, having an insertion hole through which the rotation shaft is inserted, and rotatably supported by the rotation shaft;
A biasing member that is installed between the pivot shaft and the temple and biases the temple in a direction close to the pivot shaft;
The insertion hole is
The track hole extends in the rotational direction about a virtual second axis that passes through the contact position between the contact member, the storage member, and the temple, and is parallel to the rotation shaft. A virtual image display device characterized by comprising: The virtual image display device according to claim 4,
The contact member is
A virtual image display device, wherein a contact surface with one of the storage member and the temple is formed in a convex curved surface.

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