Pupil distance adjustment mechanism and head-mounted device

Abstract

The present application belongs to the technical field of head-mounted display, and particularly relates to a pupil distance adjusting mechanism and a head-mounted device; the pupil distance adjusting mechanism comprises a support, a rotating shaft rotatably installed on the support, and two groups of optical modules slidably installed on the support along the axial direction of the rotating shaft; a threaded transmission structure is arranged between each group of optical modules and the rotating shaft; the screw threads of the two groups of threaded transmission structures are opposite in rotation direction; the pupil distance adjusting mechanism further comprises an inner elastic member and an outer elastic member arranged at opposite sides of each group of threaded transmission structures in the axial direction of the rotating shaft, and a locking structure capable of being combined with or separated from the rotating shaft; one end of the inner elastic member and the outer elastic member is respectively abutted against the corresponding side of the threaded transmission structure, and the other end of the inner elastic member and the outer elastic member is respectively defined at a position away from the threaded transmission structure; the head-mounted device comprises the pupil distance adjusting mechanism. The present application solves the problem of large space occupation of the existing pupil distance adjusting mechanism, and is beneficial to the development of the head-mounted device in the direction of miniaturization.

Description

Technical Field

[0001] This invention belongs to the field of head-mounted display technology, and particularly relates to an interpupillary distance adjustment mechanism and a head-mounted device. Background Technology

[0002] Currently, AR glasses, AR headsets, MR headsets, VR headsets and other head-mounted devices are increasingly appearing in daily life. In order to meet the needs of different users, many head-mounted devices are designed with interpupillary distance adjustment structures to adjust the interpupillary distance.

[0003] Existing head-mounted devices mostly use gear and rack transmission, belt transmission, and other structures for interpupillary distance adjustment. These structures are complex and occupy a lot of space, increasing the size of the head-mounted device and hindering its miniaturization. Summary of the Invention

[0004] The purpose of this invention is to provide an interpupillary distance adjustment mechanism and a head-mounted device, which aims to solve the problem of large space occupation of existing interpupillary distance adjustment mechanisms and facilitate the miniaturization of head-mounted devices.

[0005] This invention discloses an interpupillary distance adjustment mechanism for use in head-mounted devices. The interpupillary distance adjustment mechanism includes a bracket, a rotating shaft rotatably mounted on the bracket, and two sets of optical modules slidably mounted on the bracket along the axial direction of the rotating shaft. A threaded transmission structure is provided between each set of optical modules and the rotating shaft, and the threads of the two sets of threaded transmission structures have opposite directions. The mechanism also includes an inner elastic element and an outer elastic element respectively disposed on opposite sides of each set of threaded transmission structures along the axial direction of the rotating shaft, and a locking structure capable of engaging / disengaging with the rotating shaft. One end of each inner elastic element and the outer elastic element abuts against the corresponding side of the threaded transmission structure, and the other end of each inner elastic element and the outer elastic element is respectively limited to a position away from the threaded transmission structure.

[0006] As an improvement, the rotating shaft includes a main shaft portion and threaded shaft portions respectively connected to both ends of the main shaft portion, with the two threaded shaft portions coaxially arranged with the main shaft portion; a threaded sleeve fitted onto the threaded shaft portion is provided on the optical module.

[0007] As an improvement, a guide groove extending along the axis of the rotating shaft is provided on the bracket for each group of optical modules, and a slider inserted into the guide groove is fixed on the threaded sleeve.

[0008] As an improvement, the outer diameter of the threaded shaft portion is smaller than the outer diameter of the main shaft portion, and a main shaft ring platform is formed at the connection between the threaded shaft portion and the main shaft portion. The inner elastic element is disposed between the main shaft ring platform and the threaded sleeve and is fitted onto the threaded shaft portion. A blocking structure is provided at the end of the threaded shaft portion away from the main shaft portion, and the outer elastic element is disposed between the blocking structure and the threaded sleeve and is fitted onto the threaded shaft portion.

[0009] As an improvement, an elongated groove is provided on the bracket, and the rotating shaft is disposed inside the elongated groove.

[0010] As an improvement, the locking structure includes a base mounted on the bracket, a locking member slidably mounted on the base along the pivot axis, a locking elastic member for pushing the locking member to slide towards the pivot axis, a limiting member slidably mounted on the side of the locking member along the direction towards / away from the locking member, a limiting elastic member for pushing the limiting member to slide towards the locking member, and a push block slidably mounted on the base for pushing the limiting member to slide away from the locking member. A limiting structure capable of engagement / disengagement is provided between the limiting member and the locking member. A plurality of engagement portions for cooperating with the locking member are provided on the pivot axis, and the plurality of engagement portions are arranged sequentially along the circumference of the pivot axis.

[0011] As an improvement, the limiting member and the limiting elastic member are respectively provided on opposite sides of the locking member, and the limiting structure is respectively provided between the limiting members on both sides and the corresponding sides of the locking member; the push block is slidably installed between the two limiting members, and a pushing part is respectively provided on the push block at the limiting members on both sides.

[0012] As an improvement, the base includes a mounting plate fixedly connected to the bracket, a carrier plate disposed on the mounting plate, and a cover plate covering the side of the carrier plate. The locking member, the limiting member, and the push block are slidably installed between the cover plate and the carrier plate.

[0013] As an improvement, a locking groove is provided on the carrier plate corresponding to the locking member, a limiting groove communicating with the locking groove is provided on the limiting member, and an adjusting groove arranged in the same direction as the locking groove is provided on the push block. The adjusting groove and the locking groove are stacked, the groove depth of the locking groove is greater than the groove depth of the adjusting groove, and the width of the adjusting groove is greater than the width of the locking groove.

[0014] As an improvement, a locking paddle is provided on the locking member, and a push block paddle is provided on the push block. A first clearance hole and a second clearance hole are respectively provided on the cover plate corresponding to the locking paddle and the push block paddle. The locking paddle passes through the first clearance hole, and the push block paddle passes through the second clearance hole.

[0015] As an improvement, the mounting plate is provided with a receiving groove arranged along the axis of the rotating shaft, and a rotating mounting hole adapted to the main shaft is formed between the receiving groove and the corresponding elongated groove portion.

[0016] As an improvement, a convex shaft portion is provided on the main shaft portion, which is coaxially arranged with the main shaft portion. The outer diameter of the convex shaft portion is larger than the outer diameter of the main shaft portion, and a plurality of the connecting portions are provided on the convex shaft portion. The rotating mounting hole includes an intermediate section hole body adapted to the convex shaft portion and side section holes body at both ends of the intermediate section hole body adapted to the main shaft portion. A limiting step is formed between the intermediate section hole body and the side section holes body on both sides.

[0017] As an improvement, the bracket is configured as a support rod, and the elongated groove is provided on the bottom side of the support rod.

[0018] The present invention also discloses a head-mounted device, the head-mounted device including the interpupillary distance adjustment mechanism.

[0019] As an improvement, the head-mounted device is a smart glasses, including a frame and support legs respectively installed at both ends of the frame. The interpupillary distance adjustment mechanism is the frame, and the two support legs are respectively installed at both ends of the bracket.

[0020] Due to the adoption of the above technical solution, the interpupillary distance adjustment mechanism of the present invention includes a bracket, a rotating shaft rotatably mounted on the bracket, and two sets of optical modules slidably mounted on the bracket along the axial direction of the rotating shaft. A threaded transmission structure is provided between each set of optical modules and the rotating shaft. The threads of the two sets of threaded transmission structures have opposite directions. It also includes an inner elastic element and an outer elastic element respectively provided on opposite sides of each set of threaded transmission structures located along the axial direction of the rotating shaft, and a locking structure that can be engaged / disengaged with the rotating shaft. One end of the inner elastic element and the outer elastic element respectively abuts against the corresponding side of the threaded transmission structure, and the other end of the inner elastic element and the outer elastic element are respectively limited to a position away from the threaded transmission structure. The head-mounted device includes an interpupillary distance adjustment mechanism. When adjusting the interpupillary distance (IPD), the locking structure is separated from the rotating shaft. Then, the optical module is pulled away or pushed towards the center. Pulling the optical module away causes it to slide synchronously, increasing the IPD; pushing it towards the center causes it to slide synchronously, decreasing the IPD. The IPD adjustment is achieved through two sets of threaded transmission structures with opposite screw directions, effectively reducing space requirements. Furthermore, IPD adjustment can be achieved simply by pulling or pushing the optical module, eliminating the need for additional drive adjustment structures and further reducing space requirements. Operation is also very convenient. Each set of threaded transmission structures has inner and outer elastic elements on opposite sides, providing damping during IPD adjustment. The elastic force on opposite sides of the threaded transmission structures prevents axial wobbling of the optical module. This solves the problem of large space requirements in existing IPD adjustment mechanisms, facilitating the miniaturization of head-mounted devices. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the interpupillary distance adjustment mechanism according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the interpupillary distance adjustment mechanism according to an embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the locking structure of the interpupillary distance adjustment mechanism according to an embodiment of the present invention;

[0024] Figure 4 This is an exploded view of the locking structure of the interpupillary distance adjustment mechanism according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the engagement of the locking block and the push block of the locking structure of the interpupillary distance adjustment mechanism in the locked state according to an embodiment of the present invention;

[0026] Figure 6This is a schematic diagram of the engagement of the locking block and the locking block of the locking structure of the interpupillary distance adjustment mechanism in the locked state according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the engagement of the locking block and the push block of the interpupillary distance adjustment mechanism in the adjustment state according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the engagement of the locking block and the locking block of the locking structure of the interpupillary distance adjustment mechanism in the adjustment state according to an embodiment of the present invention;

[0029] Figure 9 This is a three-dimensional structural diagram of the head-mounted device according to an embodiment of the present invention;

[0030] Among them, 10. Bracket; 11. Guide groove; 12. Connecting end; 20. Rotating shaft; 21. Main shaft part; 22. Threaded shaft part; 23. Shaft head; 24. Retaining ring; 25. Locking groove; 26. Protruding shaft part; 27. Main shaft ring platform; 28. Threaded shaft ring platform; 30. Optical module; 31. Threaded sleeve; 32. Slider; 33. Connecting frame; 41. Inner elastic element; 42. Outer elastic element; 50. Seat; 51. Mounting plate; 52. 53. Carrier plate; 54. Cover plate; 55. Locking slide groove; 56. Limiting slide groove; 57. Adjusting slide groove; 58. Accommodating groove; 59. First clearance hole; 60. Second clearance hole; 61. Locking element; 62. Locking elastic element; 63. Locking lever; 64. Insertion groove; 71. Limiting element; 72. Limiting elastic element; 73. Insertion connector; 74. Limiting inclined surface; 80. Push block; 81. Push block lever; 82. Push block inclined surface; 90. Support leg. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] Figures 1 to 9 This is a schematic diagram of the interpupillary distance adjustment mechanism and head-mounted device according to an embodiment of the present invention, wherein, Figure 1 A three-dimensional structural schematic diagram of the interpupillary distance adjustment mechanism according to an embodiment of the present invention is shown. Figure 2 A cross-sectional view of the interpupillary distance adjustment mechanism according to an embodiment of the present invention is shown. Figure 3 This diagram shows a three-dimensional structural schematic of the locking structure of the interpupillary distance adjustment mechanism according to an embodiment of the present invention. Figure 4 An exploded view of the locking structure of the interpupillary distance adjustment mechanism according to an embodiment of the present invention is shown. Figure 5 This diagram illustrates the engagement of the locking block and push block of the interpupillary distance adjustment mechanism in the locked state according to an embodiment of the present invention. Figure 6 This diagram illustrates the engagement of the locking block and the locking mechanism of the interpupillary distance adjustment mechanism in the locked state according to an embodiment of the present invention. Figure 7 This diagram illustrates the engagement of the locking block and push block of the interpupillary distance adjustment mechanism in the adjustment state according to an embodiment of the present invention. Figure 8 This diagram illustrates the engagement of the locking block and the locking mechanism of the interpupillary distance adjustment mechanism in the adjustment state according to an embodiment of the present invention. Figure 9 A three-dimensional structural schematic diagram of a head-mounted device according to an embodiment of the present invention is shown. For ease of description, only the parts relevant to the present invention are shown in the figure.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, front, back, etc.), the directional indications are only used to explain the relative positional relationship between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. If the embodiments of the present invention involve descriptions such as "first" and "second", the descriptions such as "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0034] Depend on Figures 1 to 8 As can be seen, the interpupillary distance adjustment mechanism of this invention is applied to a head-mounted device, including a bracket 10, a rotating shaft 20 rotatably mounted on the bracket 10, and two sets of optical modules 30 slidably mounted on the bracket 10 along the axial direction of the rotating shaft 20. A threaded transmission structure is provided between each set of optical modules 30 and the rotating shaft 20, and the threads of the two sets of threaded transmission structures have opposite directions. It also includes an inner elastic member 41 and an outer elastic member 42 respectively provided on opposite sides of each set of threaded transmission structures located along the axial direction of the rotating shaft 20, and a locking structure that can be engaged / disengaged from the rotating shaft 20. One end of the inner elastic member 41 and the outer elastic member 42 respectively abuts against the corresponding side of the threaded transmission structure, and the other end of the inner elastic member 41 and the outer elastic member 42 is respectively limited to a position away from the threaded transmission structure.

[0035] Since the two sets of optical modules 30 are slidably mounted on the bracket 10, and a threaded transmission structure with opposite screw directions is provided between the two sets of optical modules 30 and the rotating shaft 20, the two sets of optical modules 30 can slide synchronously in the approaching direction or synchronously in the away direction. When adjusting the interpupillary distance, the locking structure is separated from the rotating shaft 20, and then the optical module 30 is pulled in the away direction or pushed in the approaching direction. When the optical module 30 is pulled in the away direction, the two sets of optical modules 30 can slide synchronously in the away direction to increase the interpupillary distance. When the optical module 30 is pushed in the approaching direction, the two sets of optical modules 30 can slide synchronously in the approaching direction to decrease the interpupillary distance. The interpupillary distance adjustment achieved by the two sets of threaded transmission structures with opposite screw directions can effectively reduce the space occupied, and only requires pulling or pushing the optical module 30. The dynamic optical module 30 can achieve interpupillary distance adjustment without the need for an additional drive adjustment structure, which further reduces the space occupied and makes operation very convenient. An inner elastic element 41 and an outer elastic element 42 are respectively provided on the opposite sides of each set of threaded transmission structures. A damping sensation can be generated during interpupillary distance adjustment, and the elastic force on the opposite sides of the threaded transmission structure can prevent the optical module 30 from axially shaking. The interpupillary distance adjustment mechanism of the present invention solves the problem of large space occupation of existing interpupillary distance adjustment mechanisms, which is conducive to the miniaturization of head-mounted devices.

[0036] In embodiments of the present invention, such as Figure 2 As shown, the rotating shaft 20 includes a main shaft portion 21 and threaded shaft portions 22 respectively connected to both ends of the main shaft portion 21. The two threaded shaft portions 22 are coaxially arranged with the main shaft portion 21. The optical module 30 is provided with a threaded sleeve 31 fitted onto the corresponding threaded shaft portion 22.

[0037] To facilitate the sliding of the optical module 30 along the bracket 10, guide grooves 11 extending axially along the rotating shaft 20 are provided on the bracket 10 for each optical module 30. A slider 32 inserted into the guide groove 11 is fixed on the threaded sleeve 31. When the optical module 30 is pulled or pushed to slide, the guide groove 11 can play a guiding role, eliminating the need for a sliding connection structure and further reducing the size of the interpupillary distance adjustment mechanism. Moreover, under the constraint of the slider 32 and the guide groove 11, the optical module 30 can only slide along the rotating shaft 20 and will not rotate around the rotating shaft 20.

[0038] In some other embodiments, the cross-section of the guide groove 11 can be set to a rectangular shape, and the outside of the threaded sleeve 31 can be set to a prism shape that matches the cross-section of the guide groove 11, usually a quadrangular prism shape.

[0039] In order to make the rotation of the rotating shaft 20 more stable, a shaft head 23 is provided at the end of the threaded shaft portion 22 away from the main shaft portion 21. The shaft head 23 is coaxially arranged with the main shaft portion 21 and rotatably connected to the bracket 10.

[0040] Specifically, the outer diameter of the threaded shaft portion 22 is smaller than the outer diameter of the main shaft portion 21. A main shaft ring platform 27 is formed at the connection between the threaded shaft portion 22 and the main shaft portion 21. An inner elastic element 41 is disposed between the main shaft ring platform 27 and the threaded sleeve 31 and is fitted onto the threaded shaft portion 22.

[0041] A blocking structure is provided at the end of the threaded shaft portion 22 away from the main shaft portion 21. An outer elastic member 42 is disposed between the blocking structure and the threaded sleeve 31 and is fitted onto the threaded shaft portion 22. Specifically, the outer diameter of the shaft head 23 is smaller than the outer diameter of the threaded shaft portion 22. A threaded shaft ring platform 28 is formed at the connection between the shaft head 23 and the threaded shaft portion 22. The blocking structure is a retaining ring 24 fitted onto the shaft head 23 and abutting against the threaded shaft ring platform 28.

[0042] Typically, the inner elastic element 41 and the outer elastic element 42 are springs, but they can also be set as elastic sleeves.

[0043] To further reduce the space occupied by the interpupillary distance adjustment mechanism, an elongated groove is provided on the bracket 10, and the rotating shaft 20 is disposed inside the elongated groove and rotatably mounted between the two ends of the elongated groove. Correspondingly, the guide groove 11 is disposed on the bottom surface of the elongated groove, and the retaining ring 24 is limited between the threaded shaft ring platform 28 and the end of the elongated groove.

[0044] Specifically, bracket 10 is a support rod, and an elongated groove is provided on the bottom side of the support rod.

[0045] In embodiments of the present invention, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the locking structure includes a base 50 mounted on the bracket 10, a locking member 61 slidably mounted on the base 50 along the pivot 20, a locking elastic member 62 for pushing the locking member 61 to slide towards the pivot 20, a limiting member 71 slidably mounted on the side of the locking member 61 along the approach / away direction, a limiting elastic member 72 for pushing the limiting member 71 to slide towards the locking member 61, and a push block 80 slidably mounted on the base 50 for pushing the limiting member 71 to slide away from the locking member 61. A limiting structure capable of engagement / disengagement is provided between the limiting member 71 and the locking member 61. Multiple engagement portions for cooperating with the locking member 61 are provided on the pivot 20, and the multiple engagement portions are arranged sequentially along the circumference of the pivot 20.

[0046] Specifically, the connecting part is a locking groove 25 arranged axially along the rotating shaft 20, and the end of the locking member 61 near the rotating shaft 20 is provided with a tooth shape to facilitate insertion into the locking groove 25. Of course, the connecting part can also be a limiting tooth arranged axially along the rotating shaft 20 and protruding from the rotating shaft 20, and a toothed groove is provided on the end of the locking member 61 near the rotating shaft 20.

[0047] To facilitate understanding, the working principle and operation of the locking structure are explained below with reference to the accompanying drawings:

[0048] In the locked state, such as Figure 5 and Figure 6 As shown, the locking member 61 is engaged with one of the connecting parts on the rotating shaft 20, and the locking member 61 is kept engaged with the connecting part by the elastic force of the locking elastic member 62, which can prevent the rotating shaft 20 from rotating and the interpupillary distance cannot be adjusted; at this time, the limiting structure between the limiting member 71 and the locking member 61 is in a separated state, and the limiting elastic member 72 corresponding to the limiting member 71 is in a compressed state.

[0049] When adjusting the interpupillary distance, move the locking element 61 away from the rotating shaft 20. Figure 3 Sliding in the direction of arrow A, the locking member 61 separates from the engagement portion on the rotating shaft 20, and compresses the locking elastic member 62 as the locking member 61 slides away from the rotating shaft 20; as the locking member 61 slides, the limiting structure between the limiting member 71 and the locking member 61 aligns, and under the elastic force of the limiting elastic member 72, the limiting structure between the limiting member 71 and the locking member 61 engages, thus confining the locking member 61 to the state where it is separated from the engagement portion on the rotating shaft 20, as shown. Figure 7 and Figure 8 As shown, at this time, the rotating shaft 20 can rotate, and the interpupillary distance adjustment mechanism is in the adjustment state, which can adjust the interpupillary distance.

[0050] After adjusting the interpupillary distance, along Figure 6 The direction of the middle arrow B pushes the push block 80 to slide, which can push the limiting member 71 to slide away from the locking member 61, so that the limiting structure between the limiting member 71 and the locking member 61 is separated. Under the elastic force of the locking elastic member 62, the locking member 61 can be pushed to slide closer to the rotating shaft 20, and the locking member 61 is engaged with a joint on the rotated rotating shaft 20, so that the interpupillary distance adjustment mechanism is in the locked state.

[0051] In other words, when the locking member 61 is slid away from the rotating shaft 20, the locking member 61 separates from the connecting part. Under the elastic force of the limiting elastic member 72, the limiting structure between the limiting member 71 and the locking member 61 can be connected without user operation. Pulling or pushing the optical module 30 can realize the interpupillary distance adjustment. After the interpupillary distance is adjusted, simply push the push block 80 to slide, and the limiting structure can be separated. Under the elastic force of the locking elastic member 62, the locking member 61 will slide towards the rotating shaft 20 without user operation and connect with the connecting part on the rotating shaft 20 to achieve locking. The operation is very convenient.

[0052] like Figure 4 , Figure 6 and Figure 8 As shown, the limiting structure includes an insertion groove 64 provided on the locking member 61 and a corresponding insertion connector 73 provided on the limiting member 71.

[0053] Specifically, limiting members 71 and limiting elastic members 72 are respectively provided on opposite sides of the locking member 61, and limiting structures are respectively provided between the limiting members 71 on both sides and the corresponding sides of the locking member 61; the push block 80 is slidably installed between the two limiting members 71, and a pushing part is provided on the push block 80 corresponding to the limiting members 71 on both sides. Usually, the pushing part is the push block inclined surface 82. In order to facilitate the sliding of the limiting members 71, a limiting inclined surface 74 adapted to the push block inclined surface 82 is provided on the limiting member 71.

[0054] In order to facilitate the sliding of the locking member 61 and the push block 80, a locking deflector 63 is provided on the locking member 61 and a push block deflector 81 is provided on the push block 80.

[0055] like Figures 2 to 8 As shown, the base 50 includes a mounting plate 51 fixedly connected to the bracket 10, a carrier plate 52 disposed on the mounting plate 51, and a cover plate 53 covering the side of the carrier plate 52. The locking member 61, the limiting member 71, and the push block 80 are respectively slidably installed between the cover plate 53 and the carrier plate 52.

[0056] To facilitate installation, a locking groove 54 is provided on the carrier plate 52 at the corresponding locking member 61, a limiting groove 55 communicating with the locking groove 54 is provided at the corresponding limiting member 71, and an adjusting groove 56 arranged in the same direction as the locking groove 54 is provided at the corresponding push block 80. Specifically, the adjusting groove 56 and the locking groove 54 are stacked, and the groove depth of the locking groove 54 is greater than the groove depth of the adjusting groove 56, and the width of the adjusting groove 56 is greater than the width of the locking groove 54, which can reduce the thickness of the cover plate 53 after it is installed with the carrier plate 52.

[0057] Typically, the locking elastic element 62 and the limiting elastic element 72 are springs, but they can also be set as elastic pillars, etc.

[0058] like Figure 3 and Figure 4 As shown, in order to facilitate the rotational mounting of the rotating shaft 20 on the bracket 10, a receiving groove 57 is provided on the mounting plate 51 of the base 50 along the axial direction of the rotating shaft 20. A rotating mounting hole that is adapted to the main shaft portion 21 of the rotating shaft 20 is formed between the receiving groove 57 and the corresponding elongated groove portion.

[0059] Specifically, to prevent the axial movement of the rotating shaft 20 from affecting the interpupillary distance adjustment, a convex shaft portion 26 is provided on the main shaft portion 21, which is coaxially arranged with the main shaft portion 21. The outer diameter of the convex shaft portion 26 is larger than the outer diameter of the main shaft portion 21, and multiple joint portions are provided on the convex shaft portion 26. The rotating mounting hole includes an intermediate section hole body adapted to the convex shaft portion 26, and side section holes body at both ends of the intermediate section hole body adapted to the main shaft portion 21. Limiting steps are formed between the intermediate section hole body and the side section holes body on both sides, which can limit the axial movement of the rotating shaft 20.

[0060] Furthermore, such as Figure 3 As shown, a first clearance hole 58 and a second clearance hole 59 are respectively provided on the cover plate 23 at the corresponding positions of the locking block 63 and the push block 81. The locking block 63 passes through the first clearance hole 58, and the push block 81 passes through the second clearance hole 59. By moving the locking block 63 and the push block 81, the locking member 61 and the push block 80 can be pushed to slide.

[0061] In other embodiments, the locking structure may also be configured as follows: a locking member 61 is radially slidably mounted on the base 50 along the rotating shaft 20; a spring plunger is correspondingly disposed on the side of the locking member 61; and two limiting grooves are provided on the corresponding side of the locking member 61, spaced apart along the sliding direction, forming a limiting structure between the spring plunger and the two limiting grooves. When the spring plunger is engaged in the limiting groove near the rotating shaft 20, the locking member 61 and the connecting part on the rotating shaft 20 are separated, and the pupillary distance adjustment mechanism is in an adjusting state, allowing for pupillary distance adjustment. When the spring plunger is engaged in the limiting groove away from the rotating shaft 20, the locking member 61 and the connecting part on the rotating shaft 20 are engaged, and the pupillary distance adjustment mechanism is locked, preventing pupillary distance adjustment. During operation, the user needs to manually push the locking member 61 to slide.

[0062] Depend on Figure 9 It is understood that the present invention also relates to a head-mounted device, which includes the above-mentioned interpupillary distance adjustment mechanism.

[0063] In this invention, the head-mounted device is a smart glasses, including a frame and support legs 90 respectively installed at both ends of the frame. The interpupillary distance adjustment mechanism is the frame, and the two support legs 90 are respectively installed at both ends of the bracket 10.

[0064] Specifically, a connecting end 12 is provided at both ends of the bracket 10, and two support legs 90 are respectively fitted onto the connecting end 12 on the corresponding side. Fasteners, such as screws, are provided between the support legs 90 and the connecting end 12.

[0065] Typically, the optical module 30 includes a connecting frame 33 fixedly connected to the threaded sleeve 31 and a lens fixedly mounted on the connecting frame 33.

[0066] In some other embodiments, the head-mounted device may also be an integrated head-mounted device, including a main unit and a headband structure connected to the main unit. The main unit includes a housing and the aforementioned interpupillary distance adjustment mechanism disposed inside the cavity enclosed by the housing. The bracket 10 is fixedly installed inside the cavity enclosed by the housing, and the optical module 30 is a lens barrel module.

[0067] The above description is merely some embodiments of the present invention and is 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 within the protection scope of the present invention.

Claims

1. An interpupillary distance adjustment mechanism, applied to a head-mounted device, characterized in that, The device includes a bracket, a rotating shaft rotatably mounted on the bracket, and two sets of optical modules slidably mounted on the bracket along the axial direction of the rotating shaft. A threaded drive structure is provided between each set of optical modules and the rotating shaft, with the threads of the two sets of threaded drive structures having opposite directions. It also includes an inner elastic element and an outer elastic element respectively disposed on opposite sides of each set of threaded drive structures along the axial direction of the rotating shaft, and a locking structure capable of engaging / disengaging with the rotating shaft. One end of each inner and outer elastic element abuts against the corresponding side of the threaded drive structure, and the other end of each inner and outer elastic element is confined to a position away from the threaded drive structure. The locking structure includes a base mounted on the bracket, a locking member slidably mounted on the base along the pivot axis, a locking elastic member for pushing the locking member to slide towards the pivot axis, a limiting member disposed on the side of the locking member and slidably mounted on the base along the direction towards / away from the locking member, a limiting elastic member for pushing the limiting member to slide towards the locking member, and a push block slidably mounted on the base for pushing the limiting member to slide away from the locking member. A limiting structure capable of engagement / disengagement is provided between the limiting member and the locking member. Multiple engagement portions for cooperating with the locking member are provided on the pivot axis, and the multiple engagement portions are arranged sequentially along the circumference of the pivot axis. When the locking member is slid away from the rotating shaft, the locking member and the connecting part of the rotating shaft are separated. When the limiting structure between the limiting member and the locking member is aligned, the limiting elastic member pushes the limiting structure between the limiting member and the locking member to engage, and the interpupillary distance adjustment mechanism is in the adjustment state. The push block is slid towards the rotating shaft, and the push block pushes the limiting member to slide away from the locking member. The limiting structure between the limiting member and the locking member is separated. The locking elastic member pushes the locking member to slide towards the rotating shaft, so that the locking member engages with one of the connecting parts of the rotating shaft, and the interpupillary distance adjustment mechanism is in a locked state.

2. The interpupillary distance adjustment mechanism according to claim 1, characterized in that, The rotating shaft includes a main shaft portion and threaded shaft portions connected to both ends of the main shaft portion, with the two threaded shaft portions coaxially arranged with the main shaft portion; the optical module is provided with a threaded sleeve fitted onto the threaded shaft portion.

3. The interpupillary distance adjustment mechanism according to claim 2, characterized in that, Each optical module is provided with a guide groove extending along the axis of the rotating shaft on the bracket, and a slider inserted into the guide groove is fixed on the threaded sleeve.

4. The interpupillary distance adjustment mechanism according to claim 2, characterized in that, The outer diameter of the threaded shaft portion is smaller than the outer diameter of the main shaft portion. A main shaft ring platform is formed at the connection between the threaded shaft portion and the main shaft portion. The inner elastic element is disposed between the main shaft ring platform and the threaded sleeve and is fitted onto the threaded shaft portion. A blocking structure is provided at the end of the threaded shaft portion away from the main shaft portion. The outer elastic element is disposed between the blocking structure and the threaded sleeve and is fitted onto the threaded shaft portion.

5. The interpupillary distance adjustment mechanism according to any one of claims 2 to 4, characterized in that, The bracket has an elongated groove, and the rotating shaft is disposed inside the elongated groove.

6. The interpupillary distance adjustment mechanism according to claim 5, characterized in that, The limiting member and the limiting elastic member are respectively provided on opposite sides of the locking member, and the limiting structure is respectively provided between the limiting members on both sides and the corresponding side of the locking member; the push block is slidably installed between the two limiting members, and the push block is respectively provided with a pushing part at the limiting members on both sides.

7. The interpupillary distance adjustment mechanism according to claim 5, characterized in that, The base includes a mounting plate fixedly connected to the bracket, a carrier plate disposed on the mounting plate, and a cover plate covering the side of the carrier plate. The locking member, the limiting member, and the push block are slidably installed between the cover plate and the carrier plate.

8. The interpupillary distance adjustment mechanism according to claim 7, characterized in that, The carrier plate has a locking groove corresponding to the locking member, a limiting groove corresponding to the limiting member and communicating with the locking groove, and an adjusting groove corresponding to the push block and arranged in the same direction as the locking groove. The adjusting groove and the locking groove are stacked. The groove depth of the locking groove is greater than the groove depth of the adjusting groove, and the width of the adjusting groove is greater than the width of the locking groove.

9. The interpupillary distance adjustment mechanism according to claim 8, characterized in that, The locking member is provided with a locking paddle, and the push block is provided with a push block paddle. The cover plate is provided with a first clearance hole and a second clearance hole respectively corresponding to the locking paddle and the push block paddle. The locking paddle passes through the first clearance hole, and the push block paddle passes through the second clearance hole.

10. The interpupillary distance adjustment mechanism according to claim 7, characterized in that, The mounting plate is provided with a receiving groove arranged along the axial direction of the rotating shaft, and a rotating mounting hole adapted to the main shaft is formed between the receiving groove and the corresponding elongated groove portion.

11. The interpupillary distance adjustment mechanism according to claim 10, characterized in that, The main shaft portion is provided with a convex shaft portion coaxially arranged with the main shaft portion. The outer diameter of the convex shaft portion is larger than the outer diameter of the main shaft portion. Multiple connecting portions are provided on the convex shaft portion. The rotating mounting hole includes an intermediate section hole body adapted to the convex shaft portion and side section holes body respectively provided at both ends of the intermediate section hole body adapted to the main shaft portion. Limiting steps are formed between the intermediate section hole body and the side section holes body on both sides.

12. The interpupillary distance adjustment mechanism according to claim 6, characterized in that, The bracket is configured as a support rod, and the elongated groove is provided on the bottom side of the support rod.

13. A head-mounted device, characterized in that, Includes the interpupillary distance adjustment mechanism as described in any one of claims 1 to 12.

14. The head-mounted device according to claim 13, characterized in that, The head-mounted device is a smart glasses, including a frame and support legs respectively installed at both ends of the frame. The interpupillary distance adjustment mechanism is the frame, and the two support legs are respectively installed at both ends of the bracket.

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