VR display module and head mounted device

Abstract

The present invention belongs to the field of VR technology, and in particular, relates to a VR display module and a head-mounted device; the VR display module includes a guide rod, two barrel assemblies mounted on the guide rod and capable of sliding along the guide rod, and display assemblies respectively arranged at the front side of the barrel assemblies, and a single-eye focal length adjustment mechanism is respectively arranged between the barrel assemblies and the corresponding display assemblies, and each single-eye focal length adjustment mechanism includes at least two threaded rods, a transmission wheel mounted on the end of the threaded rod, and a transmission structure arranged between the transmission wheels, and each threaded rod is respectively mounted on the barrel assembly and can rotate relative to the barrel assembly, and is transmission-connected to the display assembly; the head-mounted device includes a shell, a VR display module mounted in an area surrounded by the shell, and the guide rod is fixedly connected to the shell. The problem that the focal length of the head-mounted device can only be adjusted at the same time is solved, and it can be adjusted separately according to the visual acuity of the user's two eyes, which is very convenient to use.

Description

Technical Field

[0001] The present invention belongs to the field of VR technology, and in particular relates to a VR display module and a head-mounted device. Background Art

[0002] With the development of technology, smart wearable devices are increasingly appearing in daily life, such as VR headsets. At present, most VR headsets can adjust pupil distance and focal length to meet the different needs of users. However, since the vision of the two eyes of users is often different, and the focal length of the headset is adjusted at the same time, it cannot meet the usage needs. Summary of the invention

[0003] The purpose of the present invention is to provide a VR display module and a head-mounted device, aiming to solve the problem that the focal length of the head-mounted device can only be adjusted at the same time. It can be adjusted separately according to the vision of both eyes, which is very convenient to use.

[0004] The present invention is implemented as follows: a VR display module, the VR display module includes a guide rod, two lens barrel assemblies installed on the guide rod and capable of sliding along the guide rod respectively, and display assemblies respectively arranged on the front sides of the lens barrel assemblies, and single-eye focus adjustment mechanisms are respectively arranged between the lens barrel assemblies and the corresponding display assemblies; the single-eye focus adjustment mechanism includes at least two threaded rods extending in the front-to-back direction, a transmission wheel installed on the end of the threaded rod located on the side of the lens barrel assembly, and a transmission structure arranged between at least two of the transmission wheels, each of the threaded rods is respectively installed on the lens barrel assembly and can rotate relative to the lens barrel assembly, and is transmission-connected to the display assembly.

[0005] As an improvement, each of the single-eye focus adjustment mechanisms has three threaded rods, which are respectively arranged at the upper part, the lower part and the outer part of the lens barrel assembly; the transmission wheel is a gear, and the transmission structure is a gear belt.

[0006] As an improvement, a belt steering structure is provided between the upper gear and the outer gear, and between the lower gear and the outer gear, respectively. The belt steering structure includes an outer steering member and an inner steering member arranged on the lens barrel assembly, and the outer belt body of the gear belt is wound around the outer steering member, and the inner belt body is wound around the inner steering member.

[0007] As an improvement, the outer steering member is an arc-shaped plate and the inner steering member is a cylinder.

[0008] As an improvement, the gear belts are respectively provided between the gear on the outer side and the gear on the upper side, and between the gear on the outer side and the gear on the lower side; the gear on the outer side is a step gear, and the two gear belts are wrapped around the small outer diameter wheel body part of the step gear.

[0009] As an improvement, each of the lens barrel assemblies includes a barrel body and a mounting plate arranged at the outer side of the large end of the barrel body, and mounting holes are respectively provided on the mounting plate corresponding to each of the threaded rods, and the outer steering member and the inner steering member are arranged on the mounting plate.

[0010] As an improvement, each of the display components includes an adjustment bracket and a display screen mounted on the adjustment bracket, and a threaded hole is provided on the adjustment bracket corresponding to each of the threaded rods.

[0011] As an improvement, a guide shaft is further provided between the lens barrel assembly and the corresponding display assembly, and the guide shaft is fixed on the mounting plate and passes through a guide hole on the adjustment bracket.

[0012] As an improvement, the guide rod is arranged at the same side of the two lens barrel assemblies; a pupil distance adjustment structure is provided between the two lens barrel assemblies, and the pupil distance adjustment structure includes transmission shafts respectively arranged at the other side of the two lens barrel assemblies away from the guide rod and parallel to the guide rod, passive wheels respectively arranged on the adjacent ends of the two transmission shafts, and a driving wheel for driving the two passive wheels to rotate, and threaded sleeves sleeved on the transmission shafts are respectively connected to the two lens barrel assemblies, and threaded portions transmission-connected to the threaded sleeves are provided at corresponding positions on the transmission shafts.

[0013] The present invention is implemented in this way: a head-mounted device, the head-mounted device includes a shell, the VR display module installed in the area surrounded by the shell, and the guide rod is fixedly connected to the shell.

[0014] Due to the adoption of the above technical scheme, the VR display module of the present invention includes a guide rod, two lens barrel assemblies installed on the guide rod and capable of sliding along the guide rod respectively, and display assemblies respectively arranged on the front sides of the lens barrel assemblies, and single-eye focal length adjustment mechanisms are respectively arranged between the lens barrel assemblies and the corresponding display assemblies, and the single-eye focal length adjustment mechanisms include at least two threaded rods extending in the front-to-back direction, transmission wheels installed on the ends of the threaded rods located on the sides of the lens barrel assemblies, and a transmission structure arranged between the at least two transmission wheels, each threaded rod is installed on the lens barrel assembly and can rotate relative to the lens barrel assembly, and is transmission-connected to the display assembly; the head-mounted device includes a shell, a VR display module installed in an area surrounded by the shell, and the guide rod is fixedly connected to the shell.

[0015] At least two threaded rods are respectively provided between the lens barrel assembly and the corresponding display assembly, and a transmission structure is provided between the transmission wheels on the at least two threaded rods. The distance between the lens barrel assembly and the display assembly on the same side can be adjusted by the transmission wheel and the transmission structure, so as to achieve the purpose of adjusting the focal length. The focal length between the lens barrel assembly and the display assembly on the same side can be adjusted separately by the single-eye focal length adjustment mechanism, and the focal length of the lens barrel assembly and the display assembly on the same side can be adjusted according to the vision of the user's two eyes; an interpupillary distance adjustment mechanism is provided between the two lens barrel assemblies, which can adjust the interpupillary distance between the lens barrel assemblies; the VR display module and head-mounted device of the present invention solve the problem that the focal length of the head-mounted device can only be adjusted at the same time, and can be adjusted separately according to the vision of the user's two eyes, which is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of a VR display module according to an embodiment of the present invention;

[0017] Figure 2 2 is a schematic diagram of the main structure of a VR display module according to an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of the upward-looking structure of a VR display module according to an embodiment of the present invention;

[0019] Figure 4 is a partial enlarged structural schematic diagram of a VR display module according to an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of the three-dimensional structure of a driving device of a monocular focus adjustment mechanism according to an embodiment of the present invention;

[0021] Among them, 11, guide rod, 12a, lens barrel assembly, 12b, lens barrel assembly, 121, barrel, 122, mounting plate, 13a, display assembly, 13b, display assembly, 131, flexible ring, 14, outer steering member, 15, inner steering member, 21, threaded rod, 22, transmission wheel, 23, gear belt, 24, guide shaft, 31, transmission shaft, 32, threaded sleeve, 33, threaded part, 34, passive wheel, 35, active wheel, 41, fixing plate, 42, knob, 43, driving gear, 44, transmission gear, 45, elastic connecting member, 46, rotating shaft, 47, arc-shaped slide groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Figures 1 to 5is a structural diagram of a VR display module according to an embodiment of the present invention, wherein: Figure 1 FIG. 1 is a schematic diagram showing a three-dimensional structure of a VR display module according to an embodiment of the present invention. Figure 2 FIG. 1 shows a schematic diagram of the main structure of a VR display module according to an embodiment of the present invention. Figure 3 FIG. 1 shows a schematic diagram of the upward-view structure of a VR display module according to an embodiment of the present invention. Figure 4 FIG. 1 is a schematic diagram showing a partially enlarged structure of a VR display module according to an embodiment of the present invention. Figure 5 The figure shows a three-dimensional structure schematic diagram of a driving device of a monocular focus adjustment mechanism according to an embodiment of the present invention. For the convenience of description, only the parts related to the present invention are shown in the figure.

[0024] The side of the head mounted device closer to the user's head is defined as the back, and the side farther from the user's head is defined as the front.

[0025] Depend on Figures 1 to 4 It can be known that the VR display module includes a guide rod 11, a lens barrel assembly 12a and a lens barrel assembly 12b installed on the guide rod 11 and capable of sliding along the guide rod 11 respectively, and a display assembly 13a and a display assembly 13b respectively arranged on the front sides of the lens barrel assembly 12a and the lens barrel assembly 12b, and a single-eye focus adjustment mechanism is respectively arranged between the lens barrel assembly 12a and the display assembly 13a, and between the lens barrel assembly 12b and the display assembly 13b; the single-eye focus adjustment mechanism includes at least two threaded rods 21 connected between the lens barrel assembly and the display assembly and extending in the front-to-back direction, a transmission wheel 22 installed on the end of the threaded rod 21 located on the side of the lens barrel assembly, and a transmission structure arranged between the at least two transmission wheels 22, each threaded rod 21 is respectively installed on the lens barrel assembly and can rotate relative to the lens barrel assembly, and is transmission-connected to the display assembly.

[0026] Since the lens barrel assembly 12a and the lens barrel assembly 12b, the display assembly 13a and the display assembly 13b are independently arranged, and at least two threaded rods 21 are respectively provided between the lens barrel assembly 12a and the display assembly 13a, and between the lens barrel assembly 12b and the display assembly 13b, and a transmission structure is provided between the transmission wheels 22 on the at least two threaded rods 21, the distance between the lens barrel assembly 12a and the display assembly 13a, and between the lens barrel assembly 12b and the display assembly 13b on the same side can be adjusted by the transmission wheel 22 and the transmission structure, so as to achieve the purpose of adjusting the focal length, which solves the problem that the focal length of the head-mounted device can only be adjusted at the same time, and can be adjusted separately according to the vision of the user's two eyes, which is very convenient to use.

[0027] In this embodiment, three threaded rods 21 are provided for each single-eye focus adjustment mechanism, and the three threaded rods 21 are respectively arranged at the upper part, the lower part and the outer part of the lens barrel assembly; the transmission wheel 22 is a gear, and the transmission structure is a gear belt 23. Of course, multiple intermediate gears can also be provided between two adjacent gears for transmission.

[0028] Since the three gears are respectively arranged at the upper part, the lower part and the outer part of the lens barrel assembly, it is necessary to provide a belt steering structure between the upper gear and the outer part gear, and between the lower gear and the outer part gear, respectively. The belt steering structure includes an outer steering member 14 and an inner steering member 15 arranged on the lens barrel assembly. The outer belt body of the gear belt 23 is wound around the outer steering member 14, and the inner belt body is wound around the inner steering member 15. Specifically, the outer steering member 14 is an arc plate, and the inner steering member 15 is a cylinder.

[0029] Usually, a gear belt 23 is provided between the outer gear and the upper gear, and between the outer gear and the lower gear respectively; the outer gear is a step gear, and the two gear belts 23 are wrapped around its small warp wheel. Of course, the upper gear and the lower gear can also be set in the form of step gears.

[0030] In the present embodiment, lens barrel assembly 12a, lens barrel assembly 12b respectively comprise barrel 121, be arranged on the mounting plate 122 at the outer side edge of barrel 121 large port, and be arranged on the lens at barrel 121 small port, on mounting plate 122, corresponding each threaded rod 21 places are respectively provided with mounting hole, outer side steering member 14, inner side steering member 15 are arranged on mounting plate 122, specifically, threaded rod 21 can be arranged on mounting hole by thin-walled bearing, axle sleeve etc., can realize the relative rotation of threaded rod 21 and lens barrel assembly and do not move axially. Of course, in order to reduce weight, lens barrel assembly 12a, lens barrel assembly 12b are convenient to slide along guide rod 11, can be provided with notch on the mounting plate 122 parts between the gear on top and the gear on the outer side, between the gear on the bottom and the gear on the outer side, make the threaded rod 21 places corresponding to the gear on top, the threaded rod 21 places corresponding to the gear on the bottom form the mounting part that protrudes.

[0031] In this embodiment, the display assembly 13a and the display assembly 13b respectively include an adjustment bracket, a display screen mounted on the adjustment bracket, and an outer cover covering the display screen, and a threaded hole is respectively provided on the adjustment bracket corresponding to each threaded rod 21.

[0032] Furthermore, in order to prevent the display component 13a from colliding with the lens barrel component 12a, and the display component 13b from colliding with the lens barrel component 12b and damaging the display component 13a and the display component 13b, a flexible ring 131 is provided on the side of the adjustment bracket close to the lens barrel component, which is usually made of rubber, silicone, etc.

[0033] In this embodiment, in order to facilitate the relative movement between the lens barrel assembly 12a and the display assembly 13a, and between the lens barrel assembly 12b and the display assembly 13b, a guide shaft 24 is further provided between the lens barrel assembly 12a and the display assembly 13a, the guide shaft 24 is fixed on the mounting plate 122 of the lens barrel assembly and passes through the guide hole on the adjustment bracket of the display assembly, and the range of focal length adjustment can be limited by the guide shaft 24. Specifically, a sliding sleeve is provided on the adjustment bracket corresponding to the guide shaft 24.

[0034] Usually, two guide shafts 24 are provided corresponding to the lens barrel assembly and the display assembly on the same side, and are respectively arranged on the upper and lower sides of the outer threaded rod 21 .

[0035] In the present embodiment, the guide rod 11 is arranged at the same side of the lens barrel assembly 12a and the lens barrel assembly 12b; a pupil distance adjustment structure is provided between the lens barrel assembly 12a and the lens barrel assembly 12b, and the pupil distance adjustment structure includes a transmission shaft 31 respectively arranged at the lens barrel assembly 12a and the lens barrel assembly 12b at the other side away from the guide rod 11 and parallel to the guide rod 11, a passive wheel 34 respectively arranged on the adjacent ends of the two transmission shafts 31, and an active wheel 35 engaged with the two passive wheels 34 for driving the passive wheels 34 to rotate, and a threaded sleeve 32 sleeved on the transmission shaft 31 is respectively connected to the lens barrel assembly 12a and the lens barrel assembly 12b, and a threaded portion 33 transmission-connected to the threaded sleeve 32 is provided at a corresponding position on the transmission shaft 31.

[0036] Since the two passive wheels 34 are respectively installed on the transmission shaft 31 on both sides, the two passive wheels 34 can be driven to rotate in opposite directions by rotating the active wheel 35, and the lens barrel assembly 12a and the lens barrel assembly 12b are respectively provided with threaded sleeves 32 that are transmission-connected to the transmission shaft 31. The lens barrel assembly 12a and the lens barrel assembly 12b can be moved toward or away from each other by rotating the transmission shaft 31, thereby achieving the purpose of adjusting the pupil distance.

[0037] Specifically, the driving wheel 35 is a crown gear, and the two driven wheels 34 are spur gears. Of course, the driving wheel 35 can also be a bevel gear, and the corresponding two driven wheels 34 are also configured as bevel gears.

[0038] The present invention also relates to a head mounted device, which comprises a shell, and the above-mentioned VR display module installed in the area surrounded by the shell, the guide rod 11 is fixedly connected to the shell, the ends of the two transmission shafts 31 away from the passive wheel 34 are respectively rotatably connected to the shell, and the driving wheel 35 is installed on the shell and rotatably connected thereto; the driving wheel 35 of the pupil distance adjustment structure is rotatably connected to the shell, specifically, the rotatable connection with the shell is achieved through a support plate, and the rotatable connection with the shell can also be achieved through a rotating shaft, and a torsional portion passing through the shell is provided on the driving wheel 35.

[0039] A single-eye focal length adjustment mechanism is provided between the two lens barrel assemblies and the corresponding display assemblies, respectively, so that the focal length between the lens barrel assembly and the display assembly on the same side can be adjusted separately, and the focal length of the lens barrel assembly and the display assembly on the same side can be adjusted according to the vision of the user's two eyes; a pupil distance adjustment mechanism is provided between the two lens barrel assemblies, so that the pupil distance between the lens barrel assemblies can be adjusted; the head-mounted device solves the problem that the focal length can only be adjusted at the same time, and can be adjusted separately according to the vision of the user's two eyes, and is very convenient to use.

[0040] In this embodiment, a driving device for driving the gear on the outer side to rotate is installed on the outer side of the housing corresponding to the gear on the outer side of each single-eye focus adjustment mechanism, so as to facilitate adjustment.

[0041] like Figure 5 The driving device comprises a fixing plate 41 fixedly connected to the housing, a knob 42 rotatably connected to one side of the fixing plate 41, an arc-shaped slot 47 concentric with the knob is provided on the fixing plate 41; and a transmission gear 44 connected to the knob 42 through a rotating shaft 46 installed on the arc-shaped slot 47, the transmission gear 44 meshes with the gear on the outer side; an elastic connector 45 is provided between the mounting plate portion located in the axial direction of the arc-shaped slot 47 and the rotating shaft 46, and the elastic connector 45 is usually a spring or an elastic belt. Specifically, a driving gear 43 coaxially arranged with the knob 42 is fixedly connected to one side of the knob 42, and the driving gear 43 meshes with the transmission gear 44 to realize the transmission connection between the knob 42 and the transmission gear 44; of course, since the arc-shaped slot 47 is concentric with the knob 42, a belt can also be used to transmit between the rotating shaft 46 and the rotation center of the knob 42, so as to realize the transmission connection between the knob 42 and the transmission gear 44. Under the elastic force of the elastic connector 45 , the transmission gear 44 is always meshed with the transmission wheel 22 for adjusting the focal length. After the position of the lens barrel assembly is changed, the focal length can still be adjusted through the adjustment mechanism.

[0042] The above descriptions are only some embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A VR display module, applied to a head mounted device, comprising a guide rod, two lens barrel assemblies mounted on the guide rod and capable of sliding along the guide rod, and display assemblies respectively arranged on the front side of the lens barrel assemblies, characterized in that: A single-eye focus adjustment mechanism is provided between the lens barrel assembly and the corresponding display assembly; the single-eye focus adjustment mechanism comprises at least two threaded rods extending in the front-back direction, a transmission wheel installed on the end of the threaded rod located on the side of the lens barrel assembly, and a transmission structure arranged between at least two of the transmission wheels, each of the threaded rods is respectively installed on the lens barrel assembly and can rotate relatively with the lens barrel assembly, and is in transmission connection with the display assembly, and three threaded rods are respectively provided for each of the single-eye focus adjustment mechanisms, and the three threaded rods are respectively arranged at the upper part, the lower part and the outer part of the lens barrel assembly; the transmission wheel is a gear, and the transmission structure is a gear belt; and also includes a driving device arranged at each of the single-eye focus adjustment mechanisms; The driving device includes a fixing plate fixedly connected to the shell of the head-mounted device, a knob rotatably connected to a side surface of the fixing plate, an arc-shaped groove concentric with the knob being provided on the fixing plate; and a transmission gear installed on the arc-shaped groove through a rotating shaft and connected to the knob for transmission, the transmission gear meshing with the gear on the outer side of the monocular focal length adjustment mechanism on the corresponding side; an elastic connecting member is provided between the mounting plate portion located in the axial direction of the arc-shaped groove and the rotating shaft.

2. The VR display module according to claim 1, characterized in that: A belt steering structure is provided between the upper gear and the outer gear, and between the lower gear and the outer gear, respectively. The belt steering structure includes an outer steering member and an inner steering member arranged on the lens barrel assembly. The outer belt body of the gear belt is wound around the outer steering member, and the inner belt body is wound around the inner steering member.

3. The VR display module according to claim 2, characterized in that: The outer steering member is an arc-shaped plate, and the inner steering member is a cylinder.

4. The VR display module according to claim 2, characterized in that: The gear belts are respectively arranged between the gear on the outer side and the gear on the upper side, and between the gear on the outer side and the gear on the lower side; the gear on the outer side is a step gear, and the two gear belts are wrapped around the small outer diameter wheel body part of the step gear.

5. The VR display module according to any one of claims 2 to 4, characterized in that: Each of the lens barrel assemblies comprises a barrel body and a mounting plate arranged at the outer side of the large end of the barrel body. Mounting holes are arranged on the mounting plate corresponding to each of the threaded rods. The outer steering member and the inner steering member are arranged on the mounting plate.

6. The VR display module according to claim 5, characterized in that: Each of the display components comprises an adjustment bracket and a display screen mounted on the adjustment bracket. A threaded hole is provided on the adjustment bracket corresponding to each of the threaded rods.

7. The VR display module according to claim 6, characterized in that: A guide shaft is also provided between the lens barrel assembly and the corresponding display assembly. The guide shaft is fixed on the mounting plate and passes through a guide hole on the adjustment bracket.

8. The VR display module according to claim 1, characterized in that: The guide rod is arranged at the same side of the two lens barrel assemblies; an interpupillary distance adjustment structure is arranged between the two lens barrel assemblies, and the interpupillary distance adjustment structure includes transmission shafts respectively arranged at the other side of the two lens barrel assemblies away from the guide rod and parallel to the guide rod, passive wheels respectively arranged on the adjacent ends of the two transmission shafts, and active wheels for driving the two passive wheels to rotate, and threaded sleeves sleeved on the transmission shafts are respectively connected to the two lens barrel assemblies, and threaded parts transmission-connected to the threaded sleeves are arranged at corresponding positions on the transmission shafts.

9. A head mounted device comprising a housing, characterized in that: It also includes a VR display module as described in any one of claims 1 to 7 installed in the area enclosed by the shell, and the guide rod is fixedly connected to the shell.

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