Interpupillary distance adjustment device
By using a transmission belt to connect the knob and transmission gear in the VR headset's interpupillary distance adjustment device, the problem of unstable rotation force was solved, resulting in better feel and structural reliability, and improving the user experience.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- AAC ACOUSTIC TECH (SHENZHEN) CO LTD
- Filing Date
- 2024-12-30
- Publication Date
- 2026-07-09
AI Technical Summary
The interpupillary distance adjustment device in existing VR headsets has unstable rotational force when rotated, resulting in poor feel.
A drive belt is used to connect the knob and the drive gear. The drive belt enables smooth rotation between the knob and the drive gear, and it meshes with the lens assembly, simplifying the structure and improving the smoothness of rotation.
The knob has a good feel when turned, a simple and reliable structure, smoother transmission, and an improved user experience.
Smart Images
Figure CN2024143919_09072026_PF_FP_ABST
Abstract
Description
A pupil distance adjustment device Technical Field
[0001] This invention relates to the field of virtual reality equipment technology, and in particular to an interpupillary distance adjustment device. Background Technology
[0002] Currently, the realization of VR (Virtual Reality) functionality mainly relies on VR devices, such as head-mounted displays (VR headsets). A VR headset uses a head-mounted display to isolate the user's vision and hearing from the outside world, guiding them to experience a feeling of being in a virtual environment. The display principle of a head-mounted display is that the left and right screens display images from the left and right sides respectively. The user's eyes receive this differentiated information and combine it in their mind to create a sense of depth.
[0003] In related technologies, the interpupillary distance (IPD) of VR headsets is designed for manual adjustment. The distance between the left and right lens modules is adjusted by manually rotating a knob, specifically using a lead screw and nut structure and gear transmission. The left and right lens modules mesh with a rotating shaft, a transition gear meshes with the rotating shaft, and the knob meshes with the transition gear, which is a helical tooth. However, the transition gear has a large helix angle, resulting in uneven rotation force when turning the knob, leading to a poor tactile feel.
[0004] Therefore, it is necessary to provide a new interpupillary distance adjustment device. Technical issues
[0005] The purpose of this invention is to provide an interpupillary distance adjustment device that can solve the technical problem of unstable rotation force when the knob of the interpupillary distance adjustment device is rotated in the related art. Technical solutions
[0006] The technical solution of the present invention is as follows:
[0007] An interpupillary distance adjustment device includes: a base, a first lens assembly and a second lens assembly slidably disposed on the base, a knob rotatably disposed on the base, and a transmission assembly connected to the first lens assembly, the second lens assembly and the knob respectively; the transmission assembly includes a transmission gear rotatably disposed on the base and a transmission belt with its two ends respectively wound around the knob and the transmission gear, the knob having a first slot, the transmission gear having a second slot, the transmission belt engaging with the first slot and the second slot, and the transmission gear meshing with the first lens assembly and the second lens assembly respectively.
[0008] Optionally, the base is provided with a first protrusion, the knob is provided with a first mounting hole, the first protrusion passes through the first mounting hole, the knob rotates around the first protrusion and drives the transmission belt to rotate synchronously, and the transmission teeth follow the transmission belt to rotate synchronously.
[0009] Optionally, the interpupillary distance adjustment device further includes a limiting component fixed to one end of the first protrusion away from the base, and the two ends of the knob respectively abut against the limiting component and the base.
[0010] Optionally, the limiting component includes a limiting member fixed to the first protrusion, a support piece disposed on one end of the limiting member near the base, and a protective piece abutting against the support piece and the knob respectively, wherein the support piece is elastic in the length direction parallel to the first protrusion.
[0011] Optionally, the first lens assembly includes a first slide table slidably disposed on the base and provided with a first meshing tooth, and a first lens module connected to the first slide table, wherein the first meshing tooth meshes with the transmission tooth;
[0012] The second lens assembly includes a second slide table slidably disposed on the base and provided with a second meshing tooth, and a second lens module connected to the second slide table, wherein the second meshing tooth meshes with the transmission tooth.
[0013] The first slide and the second slide are slidably arranged relative to each other, and the first meshing tooth and the second meshing tooth are respectively located on opposite sides of the transmission tooth.
[0014] Optionally, the first meshing tooth is disposed opposite to the transmission tooth, and the second meshing tooth is disposed opposite to the transmission tooth.
[0015] Optionally, the first slide is provided with a third slot, and the first lens module is provided with a first engaging part that engages with the third slot;
[0016] The second slide is provided with a fourth slot, and the second lens module is provided with a second engaging part that engages with the fourth slot.
[0017] Optionally, the interpupillary distance adjustment device further includes a first guide shaft fixed to the base, and the first slide and the second slide are slidably disposed relative to each other on the first guide shaft.
[0018] Optionally, the first slide includes a sliding part slidably disposed on the base and connected to the first lens module, a connecting part fixed to the sliding part, and an engaging part fixed to one end of the connecting part away from the sliding part. The engaging part is provided with the first engaging tooth, and the engaging part and the second slide are respectively disposed on opposite sides of the transmission tooth and are parallel to each other.
[0019] Optionally, the interpupillary distance adjustment device further includes a second guide shaft fixed to the base and parallel to the first guide shaft, wherein the first lens module and the second lens module are slidably disposed on the second guide shaft. Beneficial effects
[0020] The beneficial effects of this invention are as follows: because the knob and the transmission gear are connected by a transmission belt, the knob and the transmission gear are driven by a belt, resulting in smooth rotation and a better feel when the knob is turned. Furthermore, the transmission belt connects the knob and the transmission gear, with the transmission gear meshing with the first lens assembly and the second lens assembly respectively. Compared to the lead screw and nut structure and gear transmission method used in related technologies, this structure is simpler and more reliable. Attached Figure Description
[0021] Figure 1 is a schematic diagram of the overall structure of the pupil distance adjustment device provided in an embodiment of the present invention;
[0022] Figure 2 is a schematic diagram of the interpupillary distance adjustment device provided in an embodiment of the present invention after removing the second lens module;
[0023] Figure 3 is an enlarged view of detail A in Figure 2;
[0024] Figure 4 is an assembly diagram of the base, the first guide shaft, and the second guide shaft provided in an embodiment of the present invention;
[0025] Figure 5 is an assembly diagram of the knob and limiting assembly provided in an embodiment of the present invention;
[0026] Figure 6 is a cross-sectional view along the BB direction in Figure 5;
[0027] Figure 7 is a schematic diagram of the transmission gear provided in an embodiment of the present invention;
[0028] Figure 8 is a schematic diagram of the structure of the second lens module provided in an embodiment of the present invention;
[0029] Figure 9 is a schematic diagram of the structure of the first slide provided in an embodiment of the present invention. Embodiments of the present invention
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0031] Please refer to Figures 1 to 9. The present invention provides an interpupillary distance adjustment device for use in VR headsets (e.g., VR glasses). The interpupillary distance adjustment device includes: a base 1, a first lens assembly 2 and a second lens assembly 3 slidably disposed on the base 1, a knob 4 rotatably disposed on the base 1, and a transmission assembly 5 connected to the first lens assembly 2, the second lens assembly 3 and the knob 4 respectively. The transmission assembly 5 includes a transmission tooth 51 rotatably disposed on the base 1 and a transmission belt 52 with its two ends wound around the knob 4 and the transmission tooth 51 respectively. The knob 4 is provided with a first slot 41, and the transmission tooth 51 is provided with a second slot 511. The transmission belt 52 engages with the first slot 41 and the second slot 511 respectively, and the transmission tooth 51 meshes with the first lens assembly 2 and the second lens assembly 3 respectively.
[0032] Because the knob 4 and the transmission gear 51 are connected by a transmission belt 52, the knob 4 and the transmission gear 51 are driven by a belt, resulting in smooth rotation and a good feel when the knob 4 is turned. Furthermore, the transmission belt 52 connects the knob 4 and the transmission gear 51, which meshes with the first lens assembly 2 and the second lens assembly 3 respectively. Compared to the lead screw and nut structure and gear transmission used in related technologies, this structure is simpler and more reliable.
[0033] It should be noted that the first slot 41 and the second slot 511 are recessed into a semi-circular shape towards the central axis of the knob 4 and the transmission gear 51, respectively. The cross-section of the transmission belt 52 is circular, and the transmission belt 52 engages with the first slot 41 and the second slot 511. In other embodiments, the first slot 41, the second slot 511, and the transmission belt 52 may also have other forms of engagement.
[0034] Please refer to Figures 3, 4, and 5. The base 1 is provided with a first protrusion 11, and the knob 4 is provided with a first mounting hole 42. The first protrusion 11 passes through the first mounting hole 42. The knob 4 rotates around the first protrusion 11 to realize the rotational connection between the knob 4 and the base 1. The knob 4 drives the transmission belt 52 to rotate synchronously, and the transmission teeth 51 follow the transmission belt 52 to rotate synchronously. This realizes the static friction transmission between the transmission belt 52 and the knob 4, and between the transmission belt 52 and the transmission teeth 51, further improving the rotational smoothness between the transmission belt 52 and the knob 4, and between the transmission belt 52 and the transmission teeth 51, thereby improving the rotational feel of the knob 4.
[0035] Depending on actual needs, the first protrusion 11 can be a cylinder, the first protrusion 11 is perpendicular to the plate surface of the base 1, and the knob 4 is sleeved on the outer surface of the first protrusion 11.
[0036] Please refer to Figures 3, 4, and 7. The base 1 also has a second protrusion 12. The transmission gear 51 has a second mounting hole 512, and the second protrusion 12 passes through the second mounting hole 512. The transmission gear 51 rotates around the second protrusion 12, realizing a rotatable connection between the transmission gear 51 and the base 1. Depending on actual needs, the second protrusion 12 can be a cylinder, perpendicular to the surface of the base 1. The transmission gear 51 is fitted onto the outer surface of the second protrusion 12, and is secured to the base 1 by a screw with a nut. The screw is connected to the end of the second protrusion 12 away from the base 1, and the nut of the screw abuts against the end face of the transmission gear 51 away from the base 1.
[0037] Please refer to Figures 2, 3 and 5. The interpupillary distance adjustment device also includes a limiting component 6 fixed to one end of the first protrusion 11 away from the base 1. The two ends of the knob 4 abut against the limiting component 6 and the base 1 respectively, so that the limiting component 6 can prevent the knob 4 from detaching from the base 1 along the length direction of the first protrusion 11, thereby restricting the knob 4 on the base 1.
[0038] Please refer to Figures 3, 4, and 6. The limiting component 6 includes a limiting member 61 fixed to the first protrusion 11, a support piece 62 disposed at one end of the limiting member 61 near the base 1, and a protective piece 63 abutting against the support piece 62 and the knob 4 respectively. The limiting member 61 restricts the knob 4 to the base 1 through the support piece 62 and the protective piece 63. The support piece 62 is elastic in the length direction parallel to the first protrusion 11. The support piece 62 can make the contact between the knob 4 and the base 1, and between the knob 4 and the limiting member 61, which can make the knob 4 less prone to shaking and increase the resistance when the knob 4 is rotated. The protective piece 63 can prevent the support piece 62 from scratching the knob 4. Depending on the actual needs, the limiting member 61 can be a screw with a nut, which is installed at the end of the first protrusion 11 away from the base 1. The support piece 62 can be a wave-shaped washer, and the protective piece 63 can be a regular washer.
[0039] Please refer to Figures 3, 4 and 6. In some embodiments, the support piece 62 and the protective piece 63 are both sleeved on the outside of the first protrusion 11. The knob 4 is provided with a mounting groove 43 communicating with the first mounting hole 42. The limiting component 6 is received in the mounting groove 43. That is, the limiting member 61, the support piece 62 and the protective piece 63 are all located in the mounting groove 43. The first protrusion 11 is raised relative to the bottom wall of the mounting groove 43, which not only makes it convenient to sleeve the support piece 62 and the protective piece 63 on the outside of the first protrusion 11, but also reduces the protrusion height of the first protrusion 11.
[0040] Please refer to Figures 1, 2, and 3. The first lens assembly 2 includes a first slide 21 slidably disposed on the base 1 and provided with a first engaging tooth 2131, and a first lens module 22 connected to the first slide 21. The first engaging tooth 2131 engages with a transmission tooth 51, so that the transmission tooth 51 can drive the first slide 21 to move, and the first slide 21 drives the first lens module 22 to move. The second lens assembly 3 includes a second slide 31 slidably disposed on the base 1 and provided with a second engaging tooth 311, and a second lens module 32 connected to the second slide 31. The second engaging tooth 311 engages with the transmission tooth 51, so that the transmission tooth 51 can drive the second slide 31 to move, and the second slide 31 drives the second lens module 32 to move. The first slide 21 and the second slide 31 are slidably arranged relative to each other. The first meshing tooth 2131 and the second meshing tooth 311 are respectively arranged on opposite sides of the transmission tooth 51, so that the transmission tooth 51 can drive the first slide 21 and the second slide 31 to move towards each other or in opposite directions, thereby driving the first lens module 22 and the second lens module 32 to move towards each other or in opposite directions, so as to realize the adjustment of the interpupillary distance.
[0041] It should be noted that when the knob 4 is turned clockwise, the first lens module 22 and the second lens module 32 move in opposite directions, specifically, the first lens module 22 moves to the left and the second lens module 32 moves to the right, at which time the interpupillary distance increases; when the knob 4 is turned counterclockwise, the first lens module 22 and the second lens module 32 move towards each other, specifically, the first lens module 22 moves to the right and the second lens module 32 moves to the left, at which time the interpupillary distance decreases.
[0042] Please refer to Figures 2 and 3. In some embodiments, the first meshing tooth 2131 is arranged opposite to the transmission tooth 51, and the second meshing tooth 311 is arranged opposite to the transmission tooth 51. This makes the first meshing tooth 2131 and the transmission tooth 51, as well as the second meshing tooth 311 and the transmission tooth 51, both straight tooth transmissions rather than helical tooth transmissions. This can improve the stability of the transmission and further improve the feel of rotating the knob 4.
[0043] Please refer to Figures 2, 3, and 9. The first slide 21 is provided with a third slot 2111, and the first lens module 22 is provided with a first engaging part 221 that engages with the third slot 2111. The engagement between the first engaging part 221 and the third slot 2111 achieves a fixed connection between the first lens module 22 and the first slide 21. The second slide 31 is provided with a fourth slot 312, and the second lens module 32 is provided with a second engaging part 321 that engages with the fourth slot 312. The engagement between the second engaging part 321 and the fourth slot 312 achieves a fixed connection between the second lens module 32 and the second slide 31. Depending on actual needs, the third slot 2111 is located at the end of the first slide 21 furthest from the second slide 31, and the fourth slot 312 is located at the end of the second slide 31 furthest from the first slide 21.
[0044] Please refer to Figures 2 and 4. The interpupillary distance adjustment device also includes a first guide shaft 7 fixed to the base 1. The first slide 21 and the second slide 31 are slidably disposed on the first guide shaft 7, that is, the first slide 21 and the second slide 31 are coaxially disposed, so that the first guide shaft 7 can guide the movement of the first slide 21 and the second slide 31, thereby improving the smoothness of the movement of the first lens module 22 and the second lens module 32.
[0045] Please refer to Figures 2, 3, and 9. The first slide 21 includes a sliding portion 211 slidably disposed on the base 1 and connected to the first lens module 22, a connecting portion 212 fixed to the sliding portion 211, and an engaging portion 213 fixed to the end of the connecting portion 212 away from the sliding portion 211. The engaging portion 213 is provided with a first engaging tooth 2131. The engaging portion 213 and the second slide 31 are respectively disposed on opposite sides of the transmission tooth 51 and are parallel to each other, so that the transmission tooth 51 can drive the coaxially disposed first slide 21 and second slide 31 to move towards each other or in opposite directions. According to actual needs, a third slot 2111 is disposed on the sliding portion 211. The sliding portion 211 and the second slide 31 are coaxially disposed, and the sliding portion 211 and the engaging portion 213 are parallel to each other.
[0046] Please refer to Figures 2 and 4. The interpupillary distance adjustment device also includes a second guide shaft 8 fixed to the base 1 and parallel to the first guide shaft 7. The first lens module 22 and the second lens module 32 are slidably disposed on the second guide shaft 8, thereby improving the smoothness of movement of the first lens module 22 and the second lens module 32.
[0047] Please refer to Figures 2 and 4. The base 1 is also provided with a first limiting plate 9 and a second limiting plate 10. The first limiting plate 9 and the second limiting plate 10 are respectively located on both sides of the first guide shaft 7. The first slide 21 and the second slide 31 are both located between the first limiting plate 9 and the second limiting plate 10, so that the first limiting plate 9 and the second limiting plate 10 can prevent the first slide 21 and the second slide 31 from rotating relative to the first guide shaft 7.
[0048] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.
Claims
1. An interpupillary distance adjustment device, comprising: A base, a first lens assembly and a second lens assembly slidably disposed on the base, a knob rotatably disposed on the base, and a transmission assembly respectively connected to the first lens assembly, the second lens assembly and the knob; characterized in that the transmission assembly includes a transmission gear rotatably disposed on the base, and a transmission belt with its two ends respectively wound around the knob and the transmission gear, the knob having a first slot, the transmission gear having a second slot, the transmission belt engaging with the first slot and the second slot, and the transmission gear meshing with the first lens assembly and the second lens assembly respectively.
2. The interpupillary distance adjustment device according to claim 1, characterized in that, The base is provided with a first protrusion, and the knob is provided with a first mounting hole. The first protrusion passes through the first mounting hole. The knob rotates around the first protrusion and drives the transmission belt to rotate synchronously. The transmission teeth follow the transmission belt to rotate synchronously.
3. The interpupillary distance adjustment device according to claim 2, characterized in that, The interpupillary distance adjustment device further includes a limiting component fixed to one end of the first protrusion away from the base, and the two ends of the knob respectively abut against the limiting component and the base.
4. The interpupillary distance adjustment device according to claim 3, characterized in that, The limiting component includes a limiting member fixed to the first protrusion, a support piece disposed at one end of the limiting member near the base, and a protective piece abutting against the support piece and the knob respectively. The support piece is elastic in the length direction parallel to the first protrusion.
5. The interpupillary distance adjustment device according to claim 1, characterized in that, The first lens assembly includes a first slide table slidably disposed on the base and provided with a first meshing tooth, and a first lens module connected to the first slide table, wherein the first meshing tooth meshes with the transmission tooth; The second lens assembly includes a second slide table slidably disposed on the base and provided with a second meshing tooth, and a second lens module connected to the second slide table, wherein the second meshing tooth meshes with the transmission tooth. The first slide and the second slide are slidably arranged relative to each other, and the first meshing tooth and the second meshing tooth are respectively located on opposite sides of the transmission tooth.
6. The interpupillary distance adjustment device according to claim 5, characterized in that, The first meshing tooth is positioned opposite the transmission tooth, and the second meshing tooth is positioned opposite the transmission tooth.
7. The interpupillary distance adjustment device according to claim 5, characterized in that, The first slide is provided with a third slot, and the first lens module is provided with a first engaging part that engages with the third slot. The second slide is provided with a fourth slot, and the second lens module is provided with a second engaging part that engages with the fourth slot.
8. The interpupillary distance adjustment device according to claim 5, characterized in that, The interpupillary distance adjustment device further includes a first guide shaft fixed to the base, and the first slide and the second slide are slidably disposed relative to each other on the first guide shaft.
9. The interpupillary distance adjustment device according to claim 8, characterized in that, The first slide includes a sliding part that is slidably disposed on the base and connected to the first lens module, a connecting part that is fixed to the sliding part, and a meshing part that is fixed to one end of the connecting part away from the sliding part. The meshing part is provided with the first meshing tooth. The meshing part and the second slide are respectively disposed on opposite sides of the transmission tooth and are parallel to each other.
10. The interpupillary distance adjustment device according to claim 9, characterized in that, The interpupillary distance adjustment device further includes a second guide shaft fixed to the base and parallel to the first guide shaft, wherein the first lens module and the second lens module are slidably disposed on the second guide shaft.