Eye pitch adjustment mechanism and head-mounted display device including same

Abstract

Aspects of the present disclosure relate to an adjustment mechanism for adjusting a distance of an eye to a lens of a head-mounted display device. The adjustment mechanism may include an adjustment wheel rotatable by a user, a pinion fixed to a screw, and a threaded member receiving the screw and mounted to a forehead pad frame supporting a forehead pad. The adjustment wheel may include an inner bevel gear ring. The pinion rotates by rotation of the inner bevel gear ring, and the screw rotates with the pinion. The pinion and the screw may rotate about a second axis. When the screw is rotated, the threaded member moves along the screw to move the forehead pad to adjust the distance of the eye to the lens. The inner bevel gear ring, the pinion, and the screw are configured to allow additional components to pass through the interior of the adjustment wheel.

Description

Technical Field

[0001] The present disclosure relates to an adjustment mechanism for adjusting eye relief of a head-mounted display device, and a head-mounted display device including the mechanism. Background Art

[0002] Virtual reality (VR) head mounted devices (headsets) have become increasingly popular because they enable the implementation of applications, such as gaming applications, that provide an immersive interactive audio-visual experience. For example, a conventional VR head mounted device is configured to be secured on the user's face above the user's eyes and includes a pair of optical modules that include respective lenses that are configured to pass a stereoscopic image from a screen of a VR display device through them. Ensuring that the lenses are at an appropriate distance from the user's eyes is important for the quality of the user's VR experience. Therefore, a VR head mounted device may include an adjustment mechanism for adjusting the eye relief, i.e., the distance between A) the user's eyes and B) the lenses. Summary of the invention

[0003] According to a first aspect of the present invention, there is provided an adjustment mechanism for adjusting the eye-to-lens distance of a head-mounted display device, the adjustment mechanism comprising an adjustment wheel, a pinion and a screw, the adjustment wheel being rotatable by a user and comprising an inner bevel gear ring configured to rotate about a first axis; the pinion being meshed with the inner bevel gear ring and being configured to rotate about a second axis in response to the inner bevel gear rotating about the first axis; the screw being fixed to the pinion and being configured to rotate together with the pinion to move a forehead pad of the head-mounted display device.

[0004] In some embodiments, the second axis is inclined relative to the first axis.

[0005] In some embodiments, the inclination angle between the first axis and the second axis is approximately 10 degrees.

[0006] In some embodiments, the adjustment mechanism further comprises a nut fixed to a forehead pad frame supporting the forehead pad, wherein the nut receives the screw and is configured to move along the screw in response to rotation of the screw to move the forehead pad frame.

[0007] In some embodiments, the adjustment mechanism further comprises a threaded member disposed in a forehead pad frame supporting the forehead pad, wherein the threaded member receives the screw and is configured to move along the screw in response to rotation of the screw to move the forehead pad frame.

[0008] In some embodiments, the adjustment mechanism also includes a first wheel housing and a second wheel housing, the first wheel housing being disposed on a first side of the adjustment wheel and being configured to be attached to a first frame member of the head-mounted display device; the second wheel housing being disposed on a second side of the adjustment wheel and being configured to be attached to a second frame member of the head-mounted display device, wherein the first wheel housing and the second wheel housing support an inner surface of the inner bevel ring gear so that the inner bevel gear ring can rotate relative to the first wheel housing and the second wheel housing.

[0009] In some embodiments, the first wheel housing includes a first opening, the second wheel housing includes a second opening, and the first opening, the second opening and the interior space of the adjustment wheel are configured as a pass-through for a datuming component of the main thermal frame of the head-mounted display device.

[0010] In some embodiments, the internal bevel gear ring and the pinion gear have a gear ratio of approximately 3:1, and the screw has a pitch of approximately 2.7 mm.

[0011] According to a second aspect of the present disclosure, a head-mounted display device is provided, which includes an outer shell, lenses, a forehead pad, a forehead pad adjustment assembly and a screw; the lenses are arranged in the outer shell and are configured to transmit images from a screen; the forehead pad is attached to the outer shell and is configured to engage the user's forehead to position the user's eyes relative to the lenses; the forehead pad adjustment assembly includes an adjustment wheel and a pinion, the adjustment wheel is partially exposed to the outside of the outer shell and includes an inner bevel gear ring that can be rotated by the user around a first axis; the pinion is meshed with the inner bevel gear ring and is configured to rotate around a second axis in response to the inner bevel gear rotating around the first axis; the screw is fixed to the pinion and is operatively connected to the forehead pad, and the screw is configured to rotate together with the pinion to move the forehead pad, thereby changing the distance between the lenses and the forehead pad.

[0012] In some embodiments, the second axis is inclined relative to the first axis.

[0013] In some embodiments, the forehead pad adjustment assembly further comprises a threaded member disposed in a forehead pad frame supporting the forehead pad, the threaded member receiving the screw and being configured to move along the screw in response to rotation of the screw to move the forehead pad frame, thereby changing the distance between the lenses and the forehead pad.

[0014] In some embodiments, the threaded member is a nut.

[0015] In some embodiments, the forehead pad adjustment assembly also includes a first wheel housing and a second wheel housing, the first wheel housing being disposed on a first side of the adjustment wheel and attached to a first frame member of the head-mounted display device; the second wheel housing being disposed on a second side of the adjustment wheel and attached to a second frame member of the head-mounted display device, wherein the first wheel housing and the second wheel housing support an inner surface of the inner bevel gear ring so that the inner bevel ring gear can rotate relative to the first wheel housing and the second wheel housing.

[0016] In some embodiments, the first wheel housing includes a first opening, the second wheel housing includes a second opening, and the reference component passes through the first opening and the second opening and the open interior space of the adjustment wheel.

[0017] In some embodiments, the adjustment wheel is partially disposed adjacent to a main optical rail of the head mounted display device in the interior space of the outer shell.

[0018] In some embodiments, 360 degree rotation of the adjustment wheel causes the forehead pad to move approximately 6 mm in the direction of the second axis.

[0019] In some embodiments, the adjustment wheel includes an annular handle disposed on an outer surface of the inner bevel gear ring.

[0020] According to a third aspect of the present disclosure, there is provided an adjustment mechanism for adjusting the eye-to-lens distance of a head-mounted display device, the adjustment mechanism comprising a first gear, a second gear and a screw; the first gear is disposed in the head-mounted display device and can be rotated around a first axis by a user; the second gear is meshed with the first gear in the head-mounted display device and is configured to rotate around a second axis in response to the first gear rotating around the first axis; the screw is fixed to the second gear in the head-mounted display device and is configured to rotate together with the second gear to move a forehead pad of the head-mounted display device, wherein the second axis is inclined relative to the first axis.

[0021] In some embodiments, the inclination angle between the first axis and the second axis is approximately 10 degrees.

[0022] In some embodiments, the first gear has an open interior space configured to accommodate a reference component of a main heat frame of the head mounted display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A and Figure 1B is a perspective cross-sectional view showing a portion of a head mounted display device including an eye relief adjustment mechanism.

[0024] Figure 2A is a front perspective view showing components of the eye relief adjustment mechanism.

[0025] Figure 2B It shows Figure 2A Front view of the components.

[0026] Figure 2C It shows Figure 2A A rear perspective view of the components.

[0027] Figure 3A It shows Figure 2A and Figure 2B A three-dimensional view of some of the components.

[0028] Figure 3B It shows Figure 3A Front view of the components.

[0029] Figure 3C It shows Figure 3A A side cross-sectional view of a component.

[0030] The features and aspects described herein may be better understood by referring to the following detailed description in conjunction with the accompanying drawings, in which like reference numerals indicate identical or functionally similar elements. The accompanying drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of the elements in the drawings may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0031] Aspects of the present disclosure relate to an adjustment mechanism for adjusting the distance from the eye to the lens of a head-mounted display device. The adjustment mechanism may include an adjustment wheel, a pinion, and a threaded member, the adjustment wheel being rotatable by a user's thumb or one or more other fingers, the pinion being fixed to a screw, the screw receiving the screw and being mounted to a forehead pad frame supporting the forehead pad. The adjustment wheel may include an inner bevel gear ring configured to rotate about a first axis. The pinion is configured to rotate by the rotation of the inner bevel gear ring, and the screw is configured to rotate with the pinion. The screw and the pinion may rotate about a second axis, the second axis being inclined relative to the first axis. The threaded member is configured to move along the screw in response to the rotation of the screw to move the forehead pad, thereby adjusting the distance from the eye to the lens. The inner bevel gear ring, the pinion, and the screw are configured to allow additional components of the head-mounted display device (e.g., reference components, cables, wires, radiators, or other electronic components, mechanical components, and structural components) to pass through the interior space of the adjustment wheel to reach adjacent spaces in the head-mounted display device. Therefore, the adjustment mechanism can effectively package these components in the head-mounted display device.

[0032] Other aspects of the present disclosure relate to a head mounted display device including an adjustment mechanism.

[0033] According to the embodiments described herein, an adjustment mechanism for adjusting the eye-to-lens distance of a head-mounted display device may include: an adjustment wheel, a pinion, and a screw, wherein the adjustment wheel can be rotated by a user and includes an inner bevel gear ring configured to rotate about a first axis; the pinion is meshed with the inner bevel gear ring and is configured to rotate about a second axis in response to the inner bevel gear rotating about the first axis; the screw is fixed to the pinion and is configured to rotate with the pinion to move a forehead pad of the head-mounted display device.

[0034] In some embodiments, the second axis may be inclined relative to the first axis.

[0035] In some embodiments, the inclination angle between the first axis and the second axis may be approximately 10 degrees.

[0036] In some embodiments, the adjustment mechanism may further include a nut fixed to the forehead pad frame supporting the forehead pad. The nut may receive the screw rod and may be configured to move along the screw rod in response to rotation of the screw rod to move the forehead pad frame.

[0037] In some embodiments, the adjustment mechanism may further include a threaded member disposed in the forehead pad frame supporting the forehead pad. The threaded member may receive the screw rod and may be configured to move along the screw rod in response to rotation of the screw rod to move the forehead pad frame.

[0038] In some embodiments, the adjustment mechanism may further include a first wheel housing and a second wheel housing, the first wheel housing being disposed on a first side of the adjustment wheel and being configured to be attached to a first frame member of the head mounted display device; the second wheel housing being disposed on a second side of the adjustment wheel and being configured to be attached to a second frame member of the head mounted display device. The first wheel housing and the second wheel housing may support an inner surface of the inner bevel ring gear so that the inner bevel gear ring may rotate relative to the first wheel housing and the second wheel housing.

[0039] In some embodiments, the first wheel housing may include a first opening and the second wheel housing may include a second opening. The first opening and the second opening and the interior space of the adjustment wheel may be configured as a passage for a reference component of a main heat frame of the head mounted display device.

[0040] In some embodiments, the internal bevel gear ring and pinion gear may have a gear ratio of approximately 3:1, and the screw has a pitch of approximately 2.7 mm.

[0041] According to an embodiment disclosed herein, a head-mounted display device may include an outer shell, a lens, a forehead pad, and a forehead pad adjustment assembly; the lens is disposed in the outer shell and is configured to transmit an image from a screen; the forehead pad is attached to the outer shell and is configured to engage the user's forehead to position the user's eyes relative to the lens. The forehead pad adjustment assembly may include an adjustment wheel, a pinion, and a screw; the adjustment wheel is partially exposed to the outside of the outer shell and includes an inner bevel gear ring that can be rotated by a user around a first axis; the pinion is meshed with the inner bevel gear ring and is configured to rotate around a second axis in response to the inner bevel gear rotating around the first axis; the screw is fixed to the pinion and is operatively connected to the forehead pad, and the screw is configured to rotate with the pinion to move the forehead pad, thereby changing the distance between the lens and the forehead pad.

[0042] In some embodiments, the second axis may be inclined relative to the first axis.

[0043] In some embodiments, the forehead pad adjustment assembly may further include a threaded member disposed in a forehead pad frame supporting the forehead pad. The threaded member may receive a screw rod and may be configured to move along the screw rod in response to rotation of the screw rod to move the forehead pad frame, thereby changing the distance between the lens and the forehead pad.

[0044] In some embodiments, the threaded member may be a nut.

[0045] In some embodiments, the forehead pad adjustment assembly may further include a first wheel housing and a second wheel housing, the first wheel housing being disposed on a first side of the adjustment wheel and attached to a first frame member of the head mounted display device; the second wheel housing being disposed on a second side of the adjustment wheel and attached to a second frame member of the head mounted display device. The first wheel housing and the second wheel housing may support an inner surface of the inner bevel gear ring so that the inner bevel ring gear may rotate relative to the first wheel housing and the second wheel housing.

[0046] In some embodiments, the first wheel housing may include a first opening, and the second wheel housing may include a second opening. The reference component may pass through the first opening and the second opening and the open interior space of the adjustment wheel.

[0047] In some embodiments, the adjustment wheel can be partially disposed adjacent to a main light track of the head mounted display device, within an interior space of the outer housing.

[0048] In some embodiments, 360 degree rotation of the adjustment wheel may move the forehead pad approximately 6 mm in the direction of the second axis.

[0049] In some embodiments, the adjustment wheel may include an annular handle disposed on an outer surface of the inner bevel gear ring.

[0050] According to an embodiment disclosed herein, an adjustment mechanism for adjusting the eye-to-lens distance of a head-mounted display device may include a first gear, a second gear, and a screw; the first gear is disposed in the head-mounted display device and can be rotated by a user around a first axis; the second gear is meshed with the first gear in the head-mounted display device and is configured to rotate around a second axis in response to the first gear rotating around the first axis; the screw is fixed to the second gear in the head-mounted display device and is configured to rotate with the second gear to move a forehead pad of the head-mounted display device. The second axis may be tilted relative to the first axis.

[0051] In some embodiments, the inclination angle between the first axis and the second axis may be approximately 10 degrees.

[0052] In some embodiments, the first gear can have an open interior space configured to accommodate a reference component of a main heat frame of the head mounted display device.

[0053] Several embodiments are discussed in more detail below with reference to the accompanying drawings.

[0054] Figure 1A and Figure 1B is a perspective cross-sectional view showing a portion of a head mounted display device 10 including an eye relief adjustment mechanism 100. The head mounted display device 10 may be, for example, a virtual reality (VR) head mounted device configured to be secured on a user's face above the user's eyes.

[0055] refer to Figure 1A The head mounted display device 10 includes an outer shell 12 and a lens 20 disposed in the outer shell 12, the lens being configured to allow an image from a screen of the head mounted display device 10 to pass therethrough. The head mounted display device 10 includes a forehead pad 30 attached to the outer shell 12 and configured to engage with the user's forehead to maintain a desired distance between the user's eyes and the lens 20. Figure 1A Only one lens 20 (e.g., the right lens) is shown, but it is understood that the head-mounted display device 10 includes another lens 20 (e.g., the left lens), and the forehead pad 30 also maintains a desired distance between the user's other eye and the other lens 20.

[0056] like Figure 1A and Figure 1BAs shown, the head-mounted display device 10 also includes a forehead pad frame 40, which supports the forehead pad 30 and is connected to an eye relief adjustment mechanism 100, which is used to adjust the position of the forehead pad 30 forward and backward in directions X1 and X2, respectively, so as to adjust the distance between the user's eyes and the lens 20 (also referred to as "eye relief" or "eye-to-lens distance"), as described in more detail later.

[0057] refer to Figure 1A and Figure 1B , the eye relief adjustment mechanism 100 includes an adjustment wheel 110, a small bevel gear 150, a screw 190 and a nut 200, the adjustment wheel is arranged on the top of the head mounted display device 10 and is partially exposed to the outside of the outer shell 12, the small bevel gear is configured to be driven by the adjustment wheel 110, the screw is fixedly connected to the small bevel gear 150, and the nut is fixedly installed in the forehead pad frame 40 and receives the screw 190. In addition, the eye relief adjustment mechanism 100 includes a wheel housing assembly 160, on which the adjustment wheel 110 is rotatably mounted. In one embodiment, the wheel housing assembly 160 includes a base 162, a first wheel housing 170 attached to the base, and a second wheel housing 180 connected to the first wheel housing 170.

[0058] Still reference Figure 1A and Figure 1B , the adjustment wheel 110 includes an inner bevel gear ring 120, and may also include an annular handle 130, which is disposed on the outer surface of the inner bevel gear ring 120 and forms a non-slip gripping surface for the user's thumb or one or more other fingers. For example, the annular handle 130 may be made of a polymer such as rubber, but is not limited thereto. In another embodiment, the annular handle 130 may be omitted, and the outer surface of the inner bevel ring gear 120 may be textured to form a non-slip gripping surface for the user's thumb or other fingers.

[0059] Figure 2A is a front perspective view showing components of the eye relief adjustment mechanism 100 . Figure 2B It shows Figure 2A Front view of the components. Figure 2C It shows Figure 2A A rear perspective view of the components. Figure 3A , Figure 3B and Figure 3C The components are shown respectively Figure 2A and Figure 2B 180. A perspective view, a front view and a side cross-sectional view of the components (except the second wheel housing 180). FIG. 3A to FIG. 3C The second wheel housing 180 is removed in order to more completely show the inner bevel gear ring 120, the small bevel gear 150 and the screw 190.

[0060] refer to Figure 1B , FIG. 2A to FIG. 2C as well as FIG. 3A to FIG. 3C , the first wheel housing 170 and the second wheel housing 180 are disposed on opposite sides of the adjustment wheel 110 and support the adjustment wheel 110 so that when rotated by the thumb or one or more other fingers of the user, the adjustment wheel 110 (e.g., the inner bevel gear ring 120 and the ring handle 130) can rotate about its rotation axis A1 (first axis or input axis). More specifically, when rotated by the thumb or one or more other fingers of the user, the adjustment wheel 110 (e.g., the inner bevel gear ring 120 and the ring handle 130) rotates relative to the first wheel housing 170 and the second wheel housing 180 that are fixedly mounted.

[0061] refer to Figure 1B , Figure 2A , Figure 2C , Figure 3A and Figure 3C The base 162 of the wheel housing assembly 160 is attached to the first frame member 50 in the head mounted display device 10. The first wheel housing 170 is disc-shaped and supports the adjustment wheel 110 thereon. The first wheel housing 170 may be formed integrally with the base 162.

[0062] The second wheel housing 180 is disc-shaped and supports the adjusting wheel 110 thereon. Figure 1B , Figure 2B and Figure 3B As shown, the second wheel housing 180 can have a recessed central portion 182 including holes 184 for attaching the second wheel housing 180 to the first wheel housing 170. For example, the first wheel housing 170 can include protrusions 176 that are respectively received in the holes 184, such as Figure 2B , Figure 3A and Figure 3B As shown, the second wheel housing 180 is secured to the first wheel housing 170. In addition, the first wheel housing 170 may include a first mounting hole 175 that receives a protruding portion of the first frame member 50 to secure the first wheel housing 170 to the first frame member 50. Figure 1B , Figure 2A and Figure 2B As shown, the second wheel housing 180 may include second mounting holes 185 in the recessed central portion 182 that receive protruding portions of the second frame member 60 in the head mounted display device 10 .

[0063] refer to Figure 1B and Figure 3C, the first wheel housing 170 supports the first outer portion 121 of the inner surface of the inner bevel gear ring 120. The diameter of the first wheel housing 170 is slightly smaller than the inner diameter of the inner bevel gear ring 120 at the first outer portion 121. The second wheel housing 180 supports the second outer portion 122 of the inner surface of the inner bevel gear ring 120, which is opposite to the first outer portion 121. The diameter of the second wheel housing 180 is slightly smaller than the inner diameter of the inner bevel gear ring 120 at the second outer portion 122. Therefore, the first wheel housing 170 and the second wheel housing 180 support the inner bevel gear ring 120 so that when the adjustment wheel 110 rotates, the inner surface of the inner bevel gear ring 120 can slide along the outer circumferential edges of the first wheel housing 170 and the second wheel housing 180. In addition, the first wheel housing 170 and the second wheel housing 180 seal the inner space of the adjustment wheel 110 to prevent foreign matter and contaminants (such as dirt and debris) from entering the inner space of the adjustment wheel 110 and negatively affecting the operation of the eye relief adjustment mechanism.

[0064] like Figure 1B and FIG. 3A to FIG. 3C As shown, the inner bevel gear ring 120 includes a first outer portion 121, a second outer portion 122, and a plurality of gear teeth 124 disposed between the first outer portion 121 and the second outer portion 122. The inner bevel gear ring 120 has a conical pitch surface. The pinion bevel gear 150 is disposed in an internal space defined by the inner bevel gear ring 120, and is meshed with the inner bevel gear ring 120 to be driven thereby. More specifically, the pinion bevel gear 150 includes a plurality of gear teeth 154 configured to mesh with the plurality of gear teeth 124, and has a conical pitch surface aligned with the conical pitch surface of the inner bevel gear ring 120.

[0065] refer to Figure 1B , FIG. 2A to FIG. 2C and Figure 3C The first wheel housing 170 and the second wheel housing 180 include openings 177 and 187, respectively, in which the screw 190 is rotatably mounted. In addition, a gasket or thrust washer 198 may be provided on the screw 190 to prevent the threads 191 of the screw 190 from rubbing against the second wheel housing 180. Figure 1B , Figure 2B and Figure 3A As shown, the first wheel housing 170 and the second wheel housing 180 further include openings 178 and 188, respectively. In some embodiments, the reference component 70 for the main heat frame extends through the openings 178 and 188 and the open interior space of the adjustment wheel 110 / internal bevel gear ring 120. Therefore, the openings 178 and 188 and the open interior space of the adjustment wheel 110 / internal bevel gear ring 120 achieve an effective configuration of the reference component 70 because the structure of the adjustment wheel 110 and the first wheel housing 170 and the second wheel housing 180 do not need to be surrounded by the reference component 70.

[0066] refer to Figure 1B , the nut 200 includes an internal thread 201 , and the screw 190 is received in the nut 200 such that the thread 191 of the screw 190 engages the internal thread 201 of the nut 200 .

[0067] Now refer to Figure 1B and Figure 3C The operation of the eye relief adjustment mechanism 100 is described.

[0068] like Figure 3C As shown, the adjusting wheel 110 / internal bevel gear ring 120 can be rotated by the user about the rotation axis A1 in the rotation directions R1 and R2. The small bevel gear 150 has a rotation axis A2 (a second axis or an output axis). In response to the internal bevel gear ring 120 rotating about the input axis A1 in the rotation direction R1 or R2, the small bevel gear 150 rotates about the output axis A2 in the rotation direction opposite to the direction R1 or R2. Because the screw 190 and the small bevel gear 150 are fixed together, the screw 190 rotates together with the small bevel gear 150. That is, the rotation of the adjusting wheel 110 drives the rotation of the small bevel gear 150 and the screw 190. Reference Figure 1B When the pinion gear 150 and the screw 190 rotate around the output axis A2 by the internal bevel gear ring 120 rotating in the rotation direction R1 or R2, the nut 200 moves along the thread 191 of the screw 190. More specifically, the nut 200 can translate along the screw 190 in the direction X1 or X2 in response to the rotation of the screw 190 around the output axis A2, thereby moving the forehead pad 30 together with the forehead pad frame 40 in the direction X1 or X2 to adjust the distance from the eye to the lens of the head mounted display device 10.

[0069] Due to the conical pitch surfaces of the inner bevel gear ring 120 and the conical pitch surfaces of the pinion gear 150, the output axis A2 is inclined relative to the input axis A1 (and vice versa), as shown in FIG. Figure 1B and Figure 3C As shown. In one example, the inclination angle between the input axis A1 and the output axis A2 may be about 10 degrees. Since the central axis of the screw 190 coincides with the output axis A2, and the central axis of the inner bevel gear ring 120 coincides with the input axis A1, the screw 190 is angled relative to the central axis of the inner bevel gear ring 120, thereby adding other components (e.g., the reference component 70 ( Figure 1B)) The space used by the internal space of the adjustment wheel. In addition, due to the conical pitch surface of the inner bevel gear ring 120 and the conical pitch surface of the small bevel gear 150, the orientation of the inner bevel gear ring 120 can be tilted to provide sufficient clearance between the inner bevel gear ring 120 and the main light track 80 of the head mounted display device 10. Therefore, the eye relief adjustment mechanism 100 is configured to provide a high degree of packaging efficiency.

[0070] In one embodiment, the inner bevel gear ring 120 and the pinion bevel gear 150 can have a gear ratio of about 3:1, and the screw 190 can have a pitch of about 2.7 mm. In one embodiment, two full rotations of the adjustment wheel 110 in the rotational direction R1 or R2 cause the nut 200 (and the forehead pad 30) to travel about 12 mm in the direction X1 or X2. That is, a 360-degree rotation of the adjustment wheel can cause the nut 200 (and the forehead pad 30) to move about 6 mm in the direction X1 or X2. Therefore, when the user rotates the adjustment wheel 110, the eye relief adjustment mechanism 100 can provide a high degree of mechanical advantage, so that relatively few rotations of the adjustment wheel 110 are required to achieve the full range of travel of the forehead pad 30.

[0071] According to the embodiments described herein, an adjustment mechanism for adjusting the eye-to-lens distance of a head-mounted display device includes an adjustment wheel having an inner bevel gear ring that can be rotated by a user's thumb or one or more other fingers to drive a transmission component (e.g., a pinion, a screw fixed to the pinion, and a nut engaged with the screw) to effectively adjust the position of a forehead pad, thereby changing the eye-to-lens distance of the head-mounted display device. The output axis can be tilted relative to the input axis, about which the pinion and screw rotate, and about which the adjustment wheel rotates. Therefore, the configuration and orientation of the inner bevel gear ring, the pinion, and the screw provide a relatively large space between the inner bevel gear ring and the screw to accommodate components of the head-mounted display device.

[0072] Furthermore, due to the configuration of the inner bevel gear ring, pinion gear, and screw, the inner bevel gear ring can be tilted within the head mounted display device to provide sufficient clearance from the main light track of the head mounted display device.

[0073] Furthermore, due to the configuration of the internal bevel gear ring, pinion gear and screw, the adjustment mechanism provides a substantial mechanical advantage to the user as the user rotates the adjustment wheel, such that a small amount of rotation of the adjustment wheel produces a relatively large amount of linear movement of the forehead pad.

[0074] References in this specification to "embodiments" (e.g., "some embodiments," "various embodiments," "one embodiment," "an embodiment," etc.) mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present disclosure. The appearances of these phrases in different places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily separate embodiments or alternative embodiments that are mutually exclusive of other embodiments. In addition, various features are described that may be exhibited by some embodiments but not by other embodiments. Similarly, various requirements are described that may be requirements of some embodiments but not others.

[0075] As used herein, the word "or" refers to any possible arrangement of a group of items. For example, the phrase "A, B or C" refers to at least one of A, B, C or any combination thereof, such as any of the following: A; B; C; A and B; A and C; B and C; A, B and C; or multiples of any item, such as A and A; B, B and C; A, A, B, C and C; etc.

[0076] Throughout the specification, when an element such as a layer, a region or a substrate is described as being “on another element,” “connected to another element,” or “coupled to another element,” the element may be directly “on,” “connected to,” or “coupled to,” or one or more other elements may be present between them. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to,” other elements may not be present between them.

[0077] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, and / or sections, these members, components, regions, layers, and / or sections are not limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, and / or section from another member, another component, another region, another layer, or another section. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first section mentioned in the examples described herein may also be referred to as the second member, second component, second region, second layer, or second section.

[0078] For ease of description, spatially relative terms such as "above", "above", "below", and "below" may be used herein to describe the relationship of one element to another element shown in the drawings. In addition to the orientations described in the drawings, such spatially relative terms are intended to also cover different orientations of the device when in use or operation. For example, if the device in the figure is turned over, an element described as being "above" or "above" relative to another element will be located "below" or "below" relative to the other element. Therefore, the term "above" covers both above and below orientations, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.

[0079] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "including" and "having" specifically refer to the presence of the stated features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0080] Due to manufacturing techniques and / or tolerances, the shapes shown in the drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0081] Although the subject matter has been described in language specific to structural features and / or method actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. For illustrative purposes, specific embodiments have been described herein, but various modifications may be made without departing from the scope of the embodiments. The specific features and actions described above are disclosed as example forms of implementing the appended claims. Therefore, the present embodiment is not limited except as limited by the appended claims.

Claims

1. An adjustment mechanism for adjusting the distance from an eye to a lens of a head mounted display device, the adjustment mechanism comprising: an adjustment wheel rotatable by a user and comprising an internal bevel gear ring configured to rotate about a first axis; a pinion gear meshing with the internal bevel gear ring and configured to rotate about a second axis in response to the internal bevel gear rotating about the first axis; as well as A screw is fixed to the pinion gear and is configured to rotate together with the pinion gear to move the forehead pad of the head mounted display device.

2. The adjustment mechanism according to claim 1, wherein: The second axis is inclined relative to the first axis; and preferably wherein, The inclination angle between the first axis and the second axis is about 10 degrees.

3. The adjustment mechanism according to claim 1 or 2, further comprising: a nut fixed to a forehead pad frame supporting the forehead pad, The nut receives the screw and is configured to move along the screw in response to rotation of the screw to move the forehead pad frame.

4. An adjustment mechanism according to any preceding claim, further comprising: a threaded member provided in a forehead pad frame supporting the forehead pad, wherein the threaded member receives the screw and is configured to move along the screw in response to rotation of the screw to move the forehead pad frame.

5. An adjustment mechanism according to any preceding claim, further comprising: a first wheel housing disposed on a first side of the adjustment wheel and configured to be attached to a first frame member of the head mounted display device; as well as a second wheel housing disposed on a second side of the adjustment wheel and configured to be attached to a second frame member of the head mounted display device, wherein the first wheel housing and the second wheel housing support the inner surface of the inner bevel ring gear so that the inner bevel gear ring can rotate relative to the first wheel housing and the second wheel housing; and preferably wherein the first wheel housing comprises a first opening, and the second wheel housing comprises a second opening, and The first opening, the second opening and the inner space of the adjustment wheel are configured as a passage for a reference component of a main heat frame of the head mounted display device.

6. An adjustment mechanism according to any preceding claim, wherein: The internal bevel gear ring and the pinion gear have a gear ratio of approximately 3:1, and the screw has a pitch of approximately 2.7 mm.

7. A head-mounted display device, comprising: outer shell; a lens disposed in the outer housing and configured to transmit an image from a screen; a forehead pad attached to the outer housing and configured to engage a user's forehead to position the user's eyes relative to the lenses; A forehead pad adjustment component, the forehead pad adjustment component comprising: an adjustment wheel partially exposed outside the outer housing and comprising an inner bevel gear ring rotatable about a first axis by the user, and a pinion gear meshing with the internal bevel gear ring and configured to rotate about a second axis in response to the internal bevel gear rotating about the first axis, and A screw is fixed to the pinion gear and operatively connected to the forehead pad, the screw being configured to rotate together with the pinion gear to move the forehead pad, thereby changing the distance between the lens and the forehead pad.

8. The head mounted display device according to claim 7, wherein: The second axis is inclined relative to the first axis.

9. The head mounted display device according to claim 7 or 8, wherein: The forehead pad adjustment assembly further includes a threaded member disposed in a forehead pad frame supporting the forehead pad, and wherein the threaded member receives the screw and is configured to move along the screw in response to rotation of the screw to move the forehead pad frame, thereby changing the distance between the lens and the forehead pad; and preferably Wherein, the threaded component is a nut.

10. The head mounted display device according to any one of claims 7 to 9, wherein: The forehead pad adjustment assembly also includes: a first wheel housing disposed on a first side of the adjustment wheel and attached to a first frame member of the head mounted display device; and a second wheel housing disposed on a second side of the adjustment wheel and attached to a second frame member of the head mounted display device, wherein the first wheel housing and the second wheel housing support the inner surface of the inner bevel gear ring so that the inner bevel ring gear can rotate relative to the first wheel housing and the second wheel housing; and preferably wherein the first wheel housing comprises a first opening, and the second wheel housing comprises a second opening, and The reference component passes through the first opening, the second opening and the open inner space of the adjusting wheel.

11. The head mounted display device according to any one of claims 7 to 10, wherein: The adjustment wheel is partially disposed adjacent to a main light track of the head mounted display device in an interior space of the outer shell.

12. The head mounted display device according to any one of claims 7 to 11, wherein: A 360 degree rotation of the adjustment wheel moves the forehead pad approximately 6 mm in the direction of the second axis.

13. The head mounted display device according to any one of claims 7 to 12, wherein: The adjusting wheel includes an annular handle disposed on an outer surface of the inner bevel gear ring.

14. An adjustment mechanism for adjusting the distance from an eye to a lens of a head mounted display device, the adjustment mechanism comprising: a first gear disposed in the head mounted display device and rotatable about a first axis by a user; a second gear meshing with the first gear in the head mounted display device and configured to rotate about a second axis in response to the first gear rotating about the first axis; a screw fixed to the second gear in the head mounted display device and configured to rotate together with the second gear to move a forehead pad of the head mounted display device; Wherein, the second axis is inclined relative to the first axis.

15. The adjustment mechanism according to claim 14, wherein: The inclination angle between the first axis and the second axis is about 10 degrees; and / or Wherein, the first gear has an open interior space, and the open interior space is configured to accommodate a reference component of the main heat frame of the head-mounted display device.

Images