Pupil distance adjusting device

Abstract

The invention provides an interpupillary distance adjusting device. The interpupillary distance adjusting device comprises a base, a first lens assembly, a second lens assembly, a knob and a transmission assembly, wherein the first lens assembly and the second lens assembly are arranged on the base in a relatively sliding manner; the knob is rotationally arranged on the base; the camera is characterized in that the transmission assembly comprises transmission teeth rotationally arranged on the base and a transmission belt, the two ends of the transmission belt are wound on the knob and the transmission teeth respectively, the knob is provided with a first clamping groove, the transmission teeth are provided with a second clamping groove, the transmission belt is clamped and matched with the first clamping groove and the second clamping groove, and the transmission teeth are meshed and matched with the first lens assembly and the second lens assembly respectively. The knob and the transmission teeth are connected through the transmission belt, so that belt transmission is adopted between the knob and the transmission teeth, the rotating force is stable, and the hand feeling is good. Moreover, the knob and the transmission gear are in transmission through the transmission belt, the transmission gear is engaged with the first lens assembly and the second lens assembly, and the structure is simpler and more reliable.

Description

[Technical field]

[0001] The present invention relates to the technical field of virtual reality equipment, and in particular to a pupil distance adjustment device. [Background technology]

[0002] At present, the realization of VR (Virtual Reality) functions is mainly based on VR devices, such as head-mounted display devices (VR headsets). VR headsets are a type of head-mounted display that blocks the user's vision and hearing from the outside world, guiding the user to feel like they are in a virtual environment. The display principle of the head-mounted display is that the left and right screens display the left and right images respectively, and the user's binoculars obtain this different information and combine it in their minds to produce a three-dimensional sense.

[0003] In the related art, the interpupillary distance of VR head display is designed to be manually adjusted, and the distance between the left lens module and the right lens module is adjusted by manually turning the knob, and the adjustment is specifically made by a screw nut structure and a gear transmission method, wherein the left lens module and the right lens module are meshed with the rotating shaft, the transition teeth are meshed with the rotating shaft, and the knob is meshed with the transition teeth, and the transition teeth are helical teeth. However, the transition teeth are helical teeth with a large helix angle, and when the knob is turned, the rotation force is not stable, resulting in a poor hand feel.

[0004] Therefore, it is necessary to provide a new pupil distance adjustment device. [Summary of the invention]

[0005] The object of the present invention is to provide a pupil distance adjustment device, which can solve the technical problem in the related art that the rotation force of the knob of the pupil distance adjustment device is not stable when it is turned.

[0006] The technical solution of the present invention is as follows:

[0007] A pupil distance adjustment device comprises: a base, a first lens assembly and a second lens assembly relatively slidably arranged on the base, a knob rotatably arranged on the base, and a transmission assembly respectively connected to the first lens assembly, the second lens assembly and the knob; the transmission assembly comprises a transmission tooth rotatably arranged on the base, and a transmission belt with two ends respectively wound around the knob and the transmission tooth, the knob is provided with a first clamping groove, the transmission tooth is provided with a second clamping groove, the transmission belt is clamped and matched with the first clamping groove and the second clamping groove, and the transmission tooth is respectively meshed and matched with the first lens assembly and the second lens assembly.

[0008] Optionally, a first protrusion is provided on the base, and the knob is provided with a first mounting hole. The first protrusion is inserted into the first mounting hole. The knob rotates around the first protrusion and drives the transmission belt to rotate synchronously, and the transmission tooth rotates synchronously with the transmission belt.

[0009] Optionally, the interpupillary distance adjustment device further comprises a limit assembly fixed to an end of the first protrusion away from the base, and two ends of the knob respectively abut against the limit assembly and the base.

[0010] Optionally, the limiting assembly includes a limiting member fixed to the first protrusion, a supporting sheet arranged at one end of the limiting member close to the base, and a protective sheet respectively abutting against the supporting sheet and the knob, and the supporting sheet is elastic in a 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 first meshing teeth, and a first lens module connected to the first slide table, and the first meshing teeth mesh with the transmission teeth;

[0012] The second lens assembly comprises a second slide table slidably disposed on the base and provided with second meshing teeth, and a second lens module connected to the second slide table, wherein the second meshing teeth are meshed with the transmission teeth;

[0013] The first slide table and the second slide table are arranged to slide relative to each other, and the first meshing teeth and the second meshing teeth are respectively arranged on opposite sides of the transmission teeth.

[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 card slot, and the first lens module is provided with a first card engaging portion engaged with the third card slot;

[0016] The second slide is provided with a fourth card slot, and the second lens module is provided with a second card connection portion that is card-engaged with the fourth card slot.

[0017] Optionally, the pupil distance adjustment device further comprises a first guide shaft fixed to the base, and the first slide table and the second slide table are relatively slidably arranged 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 an 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 arranged on opposite sides of the transmission tooth and are parallel to each other.

[0019] Optionally, the pupil distance adjustment device also includes a second guide shaft fixed to the base and parallel to the first guide shaft, and the first lens module and the second lens module are relatively slidably arranged on the second guide shaft.

[0020] The beneficial effect of the present invention is that since the knob and the transmission teeth are connected by a transmission belt, the knob and the transmission teeth are belt-driven, so that the rotation force is stable when the knob is turned, and the hand feeling is good. Moreover, the knob and the transmission teeth are driven by a transmission belt, and the transmission teeth are respectively engaged with the first lens assembly and the second lens assembly. Compared with the related art using a screw nut structure and a gear transmission mode for adjustment, the structure is simpler and more reliable.

Brief Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the pupil distance adjustment device provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of the pupil distance adjustment device provided by an embodiment of the present invention after the second lens module is removed;

[0023] Figure 3 yes Figure 2 A magnified view of detail A;

[0024] Figure 4 is an assembly diagram of a base, a first guide shaft, and a second guide shaft provided in an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the assembly of a knob and a limiter assembly provided in an embodiment of the present invention;

[0026] Figure 6 yes Figure 5 Cross-sectional view along the BB direction;

[0027] Figure 7 is a schematic structural diagram of a transmission tooth provided by an embodiment of the present invention;

[0028] Figure 8 is a structural schematic diagram of a second lens module provided by an embodiment of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of a first slide provided in an embodiment of the present invention. [Specific implementation method]

[0030] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0031] See also Figures 1 to 9 The present invention provides a pupil distance adjustment device, which is applied to a VR head display (such as VR glasses). The pupil distance adjustment device includes: a base 1, a first lens assembly 2 and a second lens assembly 3 relatively slidably arranged on the base 1, a knob 4 rotatably arranged on the base 1, and a transmission assembly 5 respectively connected to the first lens assembly 2, the second lens assembly 3 and the knob 4; the transmission assembly 5 includes a transmission tooth 51 rotatably arranged on the base 1, and a transmission belt 52 with two ends respectively wound around the knob 4 and the transmission tooth 51, the knob 4 is provided with a first card slot 41, the transmission tooth 51 is provided with a second card slot 511, the transmission belt 52 is respectively engaged with the first card slot 41 and the second card slot 511, and the transmission tooth 51 is respectively engaged with the first lens assembly 2 and the second lens assembly 3.

[0032] Since the knob 4 and the transmission tooth 51 are connected by the transmission belt 52, the knob 4 and the transmission tooth 51 are belt-driven, so that the rotation force is stable and the hand feeling is good when the knob 4 is turned. In addition, the knob 4 and the transmission tooth 51 are driven by the transmission belt 52, and the transmission tooth 51 is meshed with the first lens assembly 2 and the second lens assembly 3 respectively. Compared with the related art using the screw nut structure and the gear transmission mode adjustment, the structure is simpler and more reliable.

[0033] It should be noted that the first slot 41 and the second slot 511 are respectively recessed in a semicircular shape toward the central axis direction of the knob 4 and the transmission tooth 51, and the cross section of the transmission belt 52 is circular, and the transmission belt 52 is respectively engaged 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 be engaged with other forms.

[0034] See also Figure 3 , Figure 4 and Figure 5 A first protrusion 11 is provided on the base 1, and a first mounting hole 42 is provided on the knob 4. The first protrusion 11 is penetrated in 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, and the knob 4 drives the transmission belt 52 to rotate synchronously, and the transmission tooth 51 rotates synchronously with the transmission belt 52 to realize the static friction transmission between the transmission belt 52 and the knob 4, and between the transmission belt 52 and the transmission tooth 51, further improving the rotation stability between the transmission belt 52 and the knob 4, and between the transmission belt 52 and the transmission tooth 51, thereby improving the rotation feel of the knob 4.

[0035] According to 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] See also Figure 3 , Figure 4 and Figure 7 , the base 1 is also provided with a second protrusion 12, the transmission tooth 51 is provided with a second mounting hole 512, the second protrusion 12 is inserted into the second mounting hole 512, and the transmission tooth 51 rotates around the second protrusion 12 to achieve a rotational connection between the transmission tooth 51 and the base 1. According to actual needs, the second protrusion 12 can be a cylinder, the second protrusion 12 is perpendicular to the plate surface of the base 1, the transmission tooth 51 is sleeved on the outer surface of the second protrusion 12, and the transmission tooth 51 is restricted on 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 surface of the transmission tooth 51 away from the base 1.

[0037] See also Figure 2 , Figure 3 and Figure 5 The interpupillary distance adjustment device also includes a limit assembly 6 fixed to the end of the first protrusion 11 away from the base 1, and the two ends of the knob 4 are respectively abutted against the limit assembly 6 and the base 1, so that the limit assembly 6 can prevent the knob 4 from detaching from the base 1 along the length direction of the first protrusion 11, thereby limiting the knob 4 on the base 1.

[0038] See also Figure 3 , Figure 4 and Figure 6 The limiting assembly 6 includes a limiting member 61 fixed to the first protruding portion 11, a supporting sheet 62 arranged at one end of the limiting member 61 close to the base 1, and a protective sheet 63 respectively abutting against the supporting sheet 62 and the knob 4. The limiting member 61 limits the knob 4 on the base 1 through the supporting sheet 62 and the protective sheet 63; the supporting sheet 62 is elastic in the length direction parallel to the first protruding portion 11, and the supporting sheet 62 can make the contact between the knob 4 and the base 1, and between the knob 4 and the limiting member 61 closer, which can not only make the knob 4 less likely to shake, but also increase the resistance when the knob 4 is rotated; the protective sheet 63 can prevent the supporting sheet 62 from scratching the knob 4. According to actual needs, the limiting member 61 can be a screw with a nut, and the screw is installed at the end of the first protruding portion 11 away from the base 1, the supporting sheet 62 can be a corrugated gasket, and the protective sheet 63 can be a common gasket.

[0039] See also Figure 3 , Figure 4 and Figure 6In some embodiments, the support sheet 62 and the protective sheet 63 are both sleeved on the outside of the first protrusion 11, the knob 4 is provided with a mounting groove 43 connected to the first mounting hole 42, and the limit assembly 6 is accommodated in the mounting groove 43, that is, the limit member 61, the support sheet 62 and the protective sheet 63 are all located in the mounting groove 43, and the first protrusion 11 is raised relative to the bottom wall of the mounting groove 43, which not only facilitates the support sheet 62 and the protective sheet 63 to be sleeved on the outside of the first protrusion 11, but also can reduce the protrusion height of the first protrusion 11.

[0040] See also Figure 1 , Figure 2 and Figure 3 The first lens assembly 2 includes a first slide 21 slidably disposed on the base 1 and provided with a first meshing tooth 2131, and a first lens module 22 connected to the first slide 21. The first meshing tooth 2131 meshes with the 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 meshing tooth 311, and a second lens module 32 connected to the second slide 31. The second meshing tooth 311 meshes 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. Among them, the first slide 21 and the second slide 31 are arranged to slide relative to each other, and the first meshing tooth 2131 and the second meshing tooth 311 are respectively arranged on the 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 toward or in the opposite direction, thereby driving the first lens module 22 and the second lens module 32 to move toward or in the opposite direction, thereby realizing the adjustment of the pupil distance.

[0041] It should be noted that when the knob 4 is rotated 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, and the pupil distance increases; when the knob 4 is rotated counterclockwise, the first lens module 22 and the second lens module 32 move toward each other, specifically, the first lens module 22 moves to the right and the second lens module 32 moves to the left, and the pupil distance decreases.

[0042] See also Figure 2 and Figure 3 In some embodiments, the first meshing teeth 2131 are arranged opposite to the transmission teeth 51, and the second meshing teeth 311 are arranged opposite to the transmission teeth 51, so that the first meshing teeth 2131 and the transmission teeth 51, as well as the second meshing teeth 311 and the transmission teeth 51 are all straight tooth transmissions rather than helical tooth transmissions, which can improve the stability of the transmission, thereby further improving the rotation feel of the knob 4.

[0043] See also Figure 2 , Figure 3 and Fig. 9 The first slide 21 is provided with a third card slot 2111, and the first lens module 22 is provided with a first card slot 221 that is carded and matched with the third card slot 2111. The first lens module 22 and the first slide 21 are fixedly connected by the card slot 221 and the third card slot 2111. The second slide 31 is provided with a fourth card slot 312, and the second lens module 32 is provided with a second card slot 321 that is carded and matched with the fourth card slot 312. The second lens module 32 and the second slide 31 are fixedly connected by the card slot 321 and the fourth card slot 312. According to actual needs, the third card slot 2111 is located at one end of the first slide 21 away from the second slide 31, and the fourth card slot 312 is located at one end of the second slide 31 away from the first slide 21.

[0044] See also Figure 2 and Figure 4 The pupil distance adjustment device also includes a first guide shaft 7 fixed to the base 1, and the first slide 21 and the second slide 31 are relatively slidably arranged on the first guide shaft 7, that is, the first slide 21 and the second slide 31 are coaxially arranged, 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] See also Figure 2 , Figure 3 and Fig. 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 a meshing portion 213 fixed to an end of the connecting portion 212 away from the sliding portion 211, the meshing portion 213 is provided with a first meshing tooth 2131, the meshing 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 the second slide 31 to move toward or in the opposite direction. According to actual needs, the 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 meshing portion 213 are parallel to each other.

[0046] See also Figure 2 and Figure 4 The pupil 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 relatively slidably arranged on the second guide shaft 8, thereby improving the stability of the movement of the first lens module 22 and the second lens module 32.

[0047] See also Figure 2 and Figure 4A first limit plate 9 and a second limit plate 10 are also provided on the base 1. The first limit plate 9 and the second limit plate 10 are respectively arranged on both sides of the first guide shaft 7. The first slide 21 and the second slide 31 are both located between the first limit plate 9 and the second limit plate 10, so that the first limit plate 9 and the second limit 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 only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A pupil distance adjustment device, comprising: A base, a first lens assembly and a second lens assembly relatively slidably arranged on the base, a knob rotatably arranged 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 tooth rotatably arranged on the base, and a transmission belt with two ends respectively wound around the knob and the transmission tooth, the knob is provided with a first card slot, the transmission tooth is provided with a second card slot, the transmission belt is engaged with the first card slot and the second card slot, and the transmission tooth is engaged with the first lens assembly and the second lens assembly respectively.

2. The pupil distance adjustment device according to claim 1, characterized in that: The base is provided with a first protrusion, the knob is provided with a first mounting hole, the first protrusion is inserted into the first mounting hole, the knob rotates around the first protrusion and drives the transmission belt to rotate synchronously, and the transmission tooth rotates synchronously with the transmission belt.

3. The pupil distance adjustment device according to claim 2, characterized in that: The interpupillary distance adjustment device further comprises a limit assembly fixed to an end of the first protrusion away from the base, and two ends of the knob abut against the limit assembly and the base respectively.

4. The pupil distance adjustment device according to claim 3, characterized in that: The limiting assembly includes a limiting member fixed to the first protrusion, a supporting sheet arranged at one end of the limiting member close to the base, and a protective sheet respectively abutting against the supporting sheet and the knob, and the supporting sheet is elastic in a length direction parallel to the first protrusion.

5. The pupil distance adjustment device according to claim 1, characterized in that: The first lens assembly comprises a first slide table slidably disposed on the base and provided with first meshing teeth, and a first lens module connected to the first slide table, wherein the first meshing teeth mesh with the transmission teeth; The second lens assembly comprises a second slide table slidably disposed on the base and provided with second meshing teeth, and a second lens module connected to the second slide table, wherein the second meshing teeth are meshed with the transmission teeth; The first slide table and the second slide table are arranged to slide relative to each other, and the first meshing teeth and the second meshing teeth are respectively arranged on opposite sides of the transmission teeth.

6. The pupil distance adjustment device according to claim 5, characterized in that: The first meshing teeth are arranged opposite to the transmission teeth, and the second meshing teeth are arranged opposite to the transmission teeth.

7. The pupil distance adjustment device according to claim 5, characterized in that: The first slide is provided with a third card slot, and the first lens module is provided with a first card connection portion that is card-engaged with the third card slot; The second slide is provided with a fourth card slot, and the second lens module is provided with a second card connection portion that is card-engaged with the fourth card slot.

8. The pupil distance adjustment device according to claim 5, characterized in that: The interpupillary distance adjustment device further comprises a first guide shaft fixed to the base, and the first slide table and the second slide table are relatively slidably arranged on the first guide shaft.

9. The pupil distance adjustment device according to claim 8, characterized in that: The first slide includes a sliding portion slidably disposed on the base and connected to the first lens module, a connecting portion fixed to the sliding portion, and an engaging portion fixed to an end of the connecting portion away from the sliding portion, the engaging portion is provided with the first engaging tooth, and the engaging portion and the second slide are respectively disposed on opposite sides of the transmission tooth and are parallel to each other.

10. The pupil distance adjustment device according to claim 9, characterized in that: The pupil distance adjustment device also includes a second guide shaft fixed to the base and parallel to the first guide shaft, and the first lens module and the second lens module are relatively slidably arranged on the second guide shaft.

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