Interpupillary Distance Adjustment Device

Abstract

The present invention provides an interpupillary distance adjustment device applicable to VR glasses. 【Solution means】The VR glasses include a spectacle frame body, a first lens module, and a second lens module. The interpupillary distance adjustment device further includes a drive module fixed to the spectacle frame body and located between the first lens module and the second lens module. The drive module is used to drive the first lens module and the second lens module to move synchronously in a direction facing each other or away from each other so as to realize the adjustment of the interpupillary distance. The drive module includes a frame, a drive unit, a first gear member, a second gear member, a first rack, and a second rack. One end of the first rack close to the first lens module is fixed to one side of the first lens module. One end of the second rack close to the second lens module is fixed to one side of the second lens module. The first rack and the second rack are parallel to each other. Compared with the related art, the interpupillary distance adjustment device of the present invention can automatically synchronously adjust the interpupillary distance, has high adjustment accuracy, small volume occupancy, high drive efficiency, high stability, and good user experience effect.

Description

Technical Field

[0001] The present invention relates to the field of virtual reality, and particularly to an interpupillary distance adjustment device applied to VR glasses.

Background Art

[0002] A virtual reality head-mounted display device (VR, Virtual Reality) is a product that utilizes a combination of multiple technologies such as simulation technology, computer graphics, man-machine interface technology, multimedia technology, sensing technology, and network technology, and is a novel man-machine interaction means devised through a computer and the latest sensor technology. VR glasses not only bring surprise and joy to each enthusiast to experience, but also are fascinated by the unknown of its birth and prospect.

[0003] Related technology VR glasses include a spectacle frame body, a left lens module and a right lens module installed on the spectacle frame body, a screw for adjusting the interpupillary distance between the left lens module and the right lens module, and a head-mounted structure fixed to the spectacle frame body. Place the head-mounted structure on the user's head, correspond the left and right eyes to the left lens module and the right lens module respectively, rotate the knob to adjust the interpupillary distance between the left lens module and the right lens module, and improve the VR experience effect.

[0004] However, related technology VR glasses adjust their interpupillary distance through a screw. In the operation process, two motors are used to drive the mechanism respectively to realize the movement of the lens. The adjustment accuracy is low, the synchronism between the left lens module and the right lens module is poor, the stability is low, the user experience effect is poor, and it is driven using a long lead screw with a left screw and a right screw. It is restricted by the structural form, has a large volume occupancy rate, and a high efficiency loss.

[0005] Therefore, it is necessary to provide a new interpupillary distance adjustment device to solve the above problems.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The technical problem to be solved by the present invention is to provide an interpupillary distance adjustment device that can automatically synchronously adjust the interpupillary distance, has high adjustment accuracy, a small volume occupancy rate, high stability, and a good user experience effect.

Means for Solving the Problems

[0007] To solve the above technical problem, the present invention provides an interpupillary distance adjustment device applied to VR glasses. The VR glasses include a spectacle frame body, a first mounting hole and a second mounting hole that penetrate the spectacle frame body and are spaced apart from each other, and a first lens module and a second lens module respectively mounted in the first mounting hole and the second mounting hole. The lateral aperture diameters of the first mounting hole and the second mounting hole are respectively larger than the diameters of the first lens module and the second lens module. The interpupillary distance adjustment device further includes a drive module fixed to the spectacle frame body and located between the first lens module and the second lens module. The drive module is used to drive the first lens module and the second lens module to move synchronously in a direction facing each other or away from each other so as to realize the adjustment of the interpupillary distance. The drive module includes a frame fixed to the spectacle frame body, a drive unit fixed to one side of the frame, a first gear member rotatably installed in the frame and transmission-connected to the drive unit, a second gear member rotatably installed in the frame and meshing with the first gear member, a first rack meshing with the first gear member, and a second rack meshing with the second gear member. One end of the first rack close to the first lens module is fixed to one side of the first lens module, one end of the second rack close to the second lens module is fixed to one side of the second lens module, and the first rack and the second rack are parallel to each other. The first gear member includes a first pin shaft fixedly connected to the output end of the drive unit and a first gear fixed to the first pin shaft. The second gear member includes a second pin shaft rotatably installed in the frame and a second gear fixed to the second pin shaft. The number of teeth of the first gear is less than the number of teeth of the second gear.

[0008] Preferably, the first rack and the second rack are arranged with a displacement, and within a unit time, the moving amounts of the first rack and the second rack are the same.

[0009] Preferably, the frame includes a frame body fixed to one side of the spectacle frame body, an extending portion formed by extending from one side of the frame body close to the first lens module, a through hole penetrating the extending portion, a concave groove formed by denting in a direction away from the spectacle frame body from one side of the frame body close to the spectacle frame body, and a first position limiting groove and a second position limiting groove respectively communicating with the concave groove while penetrating the frame body. The drive unit is fixed in the through hole, the first gear member and the second gear member are located in the concave groove, and the first rack and the second rack are respectively installed in the first position limiting groove and the second position limiting groove.

[0010] Preferably, the first rack includes a first rack body, a first support plate extending from the first rack body in a direction close to the spectacle frame body, and a first tooth-shaped structure extending from the first support plate in a direction close to the spectacle frame body. One side of the first rack body away from the spectacle frame body forms a first gap at a distance from the groove wall of the first position limiting groove, and one side of the first support plate away from the spectacle frame body forms a second gap at a distance from the groove wall of the first position limiting groove.

[0011] Preferably, the second gap is smaller than the first gap.

[0012] Preferably, the interpupillary distance adjusting device further includes a multi-stage planetary gearbox, the input end of the multi-stage planetary gearbox is fixedly connected to the driving unit, and the output end of the multi-stage planetary gearbox is fixedly connected to the first gear member. A ring gear structure is provided in the through hole, the multi-stage planetary gearbox is provided in the through hole, and the multi-stage planetary gearbox is rotatably installed on the ring gear structure.

[0013] Preferably, the interpupillary distance adjusting device further includes a steel piece. On the frame body, a first counterbore hole and a second counterbore hole are respectively formed through corresponding to one end of the first pin shaft and one end of the second pin shaft. On one side of the frame body away from the spectacle frame body, a mounting groove is recessed. The steel piece is installed in the mounting groove. The other ends of the first pin shaft and the second pin shaft are respectively installed through the first counterbore hole and the second counterbore hole. One end of the second pin shaft close to the steel piece abuts against the steel piece.

[0014] Preferably, the interpupillary distance adjusting device further includes a bearing. The bearing is fixed in the first counterbore hole. One end of the first pin shaft is fixed in the bearing, and the other end is fixed to the output end of the driving unit.

[0015] Preferably, the frame body, the extending portion and the ring gear structure are of an integrally formed structure.

[0016] Preferably, the frame is made of a plastic material.

Advantages of the Invention

[0017] Compared with related technologies, in the interpupillary distance adjustment device of the present invention, one end of the first rack close to the first lens module is fixed to one side of the first lens module, and one end of the second rack close to the second lens module is fixed to one side of the second lens module. The first rack and the second rack are parallel to each other. The first gear member includes a first pin shaft fixed to the drive unit and a first gear fixed to the first pin shaft. The second gear member includes a second pin shaft rotatably installed on the frame and a second gear fixed to the second pin shaft. The number of teeth of the first gear is smaller than the number of teeth of the second gear. By driving and rotating the first pin shaft through the output end of the drive unit to rotate the first gear, the rotation of the first gear rotates the first rack and the second gear respectively, thereby realizing the synchronous movement of the second rack along with the rotation of the second gear in the direction facing each other or away from each other between the first rack and the second rack, realizing the automatic adjustment of the interpupillary distance between the first lens module and the second lens module, with high adjustment accuracy, small volume occupancy, high stability, and good user experience effect.

[0018] To more clearly explain the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, without creative labor, other drawings can be obtained based on these drawings, and the specific content is as follows.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0020] The following refers to the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without creative labor are all included in the protection scope of the present invention.

[0021] As shown in FIGS. 1 to 11, the present invention provides an interpupillary distance adjustment device 100 applied to VR glasses. The VR glasses include a spectacle frame body 1, a first mounting hole 4 and a second mounting hole 5 that penetrate the spectacle frame body 1 and are spaced apart from each other, and a first lens module 2 and a second lens module 3 respectively mounted in the first mounting hole 4 and the second mounting hole 5. The lateral aperture diameters of the first mounting hole 4 and the second mounting hole are larger than the diameters of the first lens module 2 and the second lens module 3 respectively. The interpupillary distance adjustment device 100 further includes a drive module 6 fixed to the spectacle frame body 1 and located between the first lens module 2 and the second lens module 3. The drive module 6 is used to drive the first lens module 2 and the second lens module 3 to move synchronously in a direction facing each other or away from each other so as to realize the adjustment of the interpupillary distance. By driving the drive module 6 to move the first lens module 2 and the second lens module 3 in a direction facing each other or away from each other, it is easy to realize the synchronous adjustment of the interpupillary distance of the left and right eyes of the lenses.

[0022] The VR glasses further include an eye cup 105 fixed to the spectacle frame body 1, fixing columns 101 relatively fixed to both sides of the spectacle frame body 1, stoppers 104 fitted on the fixing columns 101, a headset 102 fitted on one side of the fixing column 101 away from the stopper 104, and a locking member 103 for fixing the headset 102 to the fixing column 101. The headset 102 is placed on the user's head, and the left and right eyes are respectively corresponded to the first lens module 2 and the second lens module 3 and fixed through the locking member 103.

[0023] A spectacle cover is installed on one side of the spectacle frame body 1 away from the drive module 6, which has a protective effect.

[0024] The driving module 6 includes a frame 61 fixed to one side of the glasses frame body 1, a driving unit 62 fixed to one side of the frame 61, a first gear member 63 rotatably installed in the frame 61 and transmission-connected to the driving unit 62, a second gear member 64 rotatably installed in the frame 61 and meshing with the first gear member 63, a first rack 65 meshing with the first gear member 63, and a second rack 66 meshing with the second gear member 64. One end of the first rack 65 close to the first lens module 2 is fixed to one side of the first lens module 2, and one end of the second rack 66 close to the second lens module 3 is fixed to one side of the second lens module 3. The first rack 65 and the second rack 66 are parallel to each other. The parallel design of the racks significantly reduces the volume of the driving structure and increases the applicable scenarios.

[0025] Preferably, the frame 61 is removably and fixedly connected to the glasses frame body 1 to facilitate the maintenance or replacement of the driving module 6. Further, the frame 61 is fixedly connected to one side of the glasses frame body 1 through screws.

[0026] Preferably, the driving unit 62 is a stepping motor, a driving motor, etc. The driving unit 62 of the present invention selects a stepping motor and controls the adjustment speed of the lens by changing the pulse frequency through software, thereby improving the user experience. However, this driving motor is not limited to a stepping motor, and other forms of motors such as a brushed motor may be used according to considerations such as driving and cost needs.

[0027] In this embodiment, the interpupillary distance adjustment device 100 further includes a flexible circuit board 16. The flexible circuit board 16 is electrically connected to the stepping motor and is used to input power to realize motor drive.

[0028] The first lens module 2 includes a first lens barrel 21, a first lens group 22 fixed within the first lens barrel 21, and a first connection portion 23 protruding and extending from the outer wall of the first lens barrel 21. The second lens module 3 includes a second lens barrel 31, a second lens group 32 fixed within the second lens barrel 31, and a second connection portion 33 protruding and extending from the outer wall of the second lens barrel 31. The end of the first rack 65 is fastened and fixed to the first connection portion 23, and the end of the second rack 66 is fastened and fixed to the second connection portion 33. The first rack 65 is installed perpendicular to the first connection portion 23, and the second rack 66 is installed perpendicular to the second connection portion 33.

[0029] The first gear member 63 includes a first pin shaft 631 fixedly connected to the output end of the drive unit 62 and a first gear 632 fixed to the first pin shaft 631. The second gear member 64 includes a second pin shaft 641 rotatably installed on the frame 61 and a second gear 642 fixed to the second pin shaft 641. The number of teeth of the first gear 632 is smaller than the number of teeth of the second gear 642. By driving the first rack 65 and the second rack 66 using the same drive unit 62, the speeds at one end are exactly the same, ensuring that the interpupillary distance of the left and right eyes is adjusted synchronously in the direction of facing each other or moving away from each other, realizing the automatic adjustment of the interpupillary distance of the first lens module 2 and the second lens module 3, with high adjustment accuracy, small volume occupancy, light overall weight, high stability, and good user experience effect.

[0030] In this embodiment, the first rack 65 and the second rack 66 are arranged adjacent to each other with a displacement, and within a unit time, the moving amounts of the first rack 65 and the second rack 66 are the same. By introducing the second gear 642 and arranging the two racks with a displacement, it is realized that the driving parts of the first rack 65 and the second rack 66 are driven synchronously and at a constant speed along opposite directions.

[0031] The number of teeth provided on the second gear 642 is set to be larger than the number of teeth of the first gear 632. Due to a reasonable module and the difference in the number of teeth, the tip circle of the first gear 632 does not contact the tooth tip of the second rack 66, and a certain gap is formed. The second rack 66 meshes with the second gear 642 to achieve transmission. When moving left and right, it does not interfere with the first gear 632, realizing miniaturization of the volume.

[0032] Regarding the requirements for the number of teeth of the first gear 632 and the second gear 642, the design principle of the number of teeth is as follows. Let the module of the gear and the rack be m, the number of teeth of the first gear 632 be Z1, and the number of teeth of the second gear 642 be Z2. When the first gear 632 rotates one revolution, the moving amount of the first rack 65 is S1 = m * Z1. The number of revolutions of the second gear 642 is Z1 / Z2, and the corresponding moving amount of the second rack 66 is S2 = m * Z2 * Z1 / Z2 = m * Z1. Therefore, since the moving amounts of the two racks within a unit time are equal and the moving speeds are exactly the same, the effect of synchronous adjustment of the interpupillary distance is realized.

[0033] In this embodiment, the frame 61 includes a frame body 611 fixed to one side of the spectacle frame body 1, an extending portion 612 formed by extending from one side of the frame body 611 close to the first lens module 2, a through hole 614 penetrating the extending portion 612, a concave groove 613 formed by denting in a direction away from the spectacle frame body 1 from one side of the frame body 611 close to the spectacle frame body 1, and a first position limiting groove 615 and a second position limiting groove 616 that respectively penetrate the frame body 611 and communicate with the concave groove 613. The drive unit 62 is fixed in the through hole 614, the first gear member 63 and the second gear member 64 are located in the concave groove 613, and the first rack 65 and the second rack 66 are respectively installed in the first position limiting groove 615 and the second position limiting groove 616. The first position limiting groove 615 and the second position limiting groove 616 are respectively used to limit the left - right movement of the first rack 65 and the second rack 66, thereby ensuring the stable driving of the lens. The frame body 611 is installed by adopting a closed - type structure, and the first position limiting groove 615 and the second position limiting groove 616 are installed in the frame body 611, thereby effectively ensuring the structural strength of the frame body 611 and improving the structural reliability during driving and mechanical impact.

[0034] In this embodiment, the first rack 65 includes a first rack body 651, a first support plate 652 extending from the first rack body 651 in a direction close to the spectacle frame body 1, and a first tooth - shaped structure 653 extending from the first support plate 652 in a direction close to the spectacle frame body 1. A first gap 7 is formed between one side of the first rack body 651 away from the spectacle frame body 1 and the groove wall of the first position limiting groove 615 with a certain interval, and a second gap 8 is formed between one side of the first support plate 652 away from the spectacle frame body 1 and the groove wall of the first position limiting groove 615 with a certain interval.

[0035] In this embodiment, the second rack 66 includes a second rack body 661, a second support plate 662 extending from the second rack body 661 in a direction approaching the spectacle frame body 1, and a second tooth-shaped structure 663 extending from the second support plate 662 in a direction approaching the spectacle frame body 1. A first gap 7 is formed between one side of the second rack body 661 spaced apart from the spectacle frame body 1 and the groove wall of the second position-limiting groove 615, and a second gap 8 is formed between one side of the second support plate 662 spaced apart from the spectacle frame body 1 and the groove wall of the second position-limiting groove 615.

[0036] In this embodiment, the second gap 8 is smaller than the first gap 7. By using the frame body 611 in the second gap 8 as a constraint location, the structural strength of the frame body 611 is further improved.

[0037] In this embodiment, the interpupillary distance adjustment device 100 further includes a multi-stage planetary gearbox 9. The input end of the multi-stage planetary gearbox 9 is fixedly connected to the drive unit 62, and the output end of the multi-stage planetary gearbox 9 is fixedly connected to the first gear member 63. According to the needs of the drive load and speed, the multi-stage planetary gearbox 9 may be designed with different numbers of stages. A ring gear structure 10 is provided in the through hole 614. The multi-stage planetary gearbox 9 is installed in the through hole 614 and is rotatably installed on the ring gear structure 10. By rotating the multi-stage planetary gearbox 9 into the ring gear structure 10 through the output end of the drive unit 62, the control accuracy is high and the drive effect is good.

[0038] The multi-stage planetary gearbox 9 includes two-stage, three-stage, four-stage, etc., and is not limited to specific numbers of stages and transmission ratios. It can achieve very high control accuracy and improve the user experience. Preferably, the multi-stage planetary gearbox 9 is a three-stage planetary gearbox, and the moving accuracy reaches ±5um or lower, and the effect is better.

[0039] By connecting the first pin shaft 631 of the first gear member 63 to the output end of the multi-stage planetary gearbox 9, the multi-stage planetary gearbox 9 is driven via the drive unit 62 to rotate the first pin shaft 631, thereby driving and rotating the first gear 632. When the first gear 632 rotates clockwise, the second gear 642 meshing with the first gear 632 rotates counterclockwise. The first rack 65 moves to the left, and the second rack 66 moves to the right. The first lens module 2 and the second lens module 3 move in a direction facing each other. When the first gear 632 rotates counterclockwise, the first lens module 2 and the second lens module 3 move away from each other, realizing the automatic interpupillary distance adjustment function.

[0040] In this embodiment, the interpupillary distance adjustment device 100 further includes a steel piece 11. In the frame body 611, a first counterbore 12 and a second counterbore 13 are respectively formed to penetrate corresponding to one end of the first pin shaft 631 and one end of the second pin shaft 641. On one side of the frame body 611 away from the spectacle frame body 1, a mounting groove 14 is recessed away from the spectacle frame body 1. The steel piece 11 is installed in the mounting groove 14. The other ends of the first pin shaft 631 and the second pin shaft 641 are respectively installed through the first counterbore 12 and the second counterbore 13. One end of the second pin shaft 641 close to the steel piece 11 abuts against the steel piece 11.

[0041] In this embodiment, the interpupillary distance adjustment device 100 further includes a bearing 15. The bearing 15 is fixed in the first counterbore 12. One end of the first pin shaft 631 is fixed to the inner ring of the bearing 15 by welding, and the other end is supported by a bearing at the same time. Its head is inserted into the inside of the output end of the planetary gearbox and joined by a flat structure. Also, the steel piece 11 is fixed to the frame body 611 through the mounting groove 14. Thereby, the side surface of the steel piece 11 positions the second pin shaft 641 and the bearing fixing the first pin shaft 631, preventing the first pin shaft 631 from loosening or coming off in a mechanical shock environment such as dropping, and having good safety.

[0042] In this embodiment, the first pin shaft 631 and the first gear 632 adopt a flat structure for fitting, and the output ensures that the first gear 632 rotates. The second pin shaft 641 is also fixed via the steel piece 11 and position-limited. Since the upper part of the steel piece 11 and the frame body 611 are fixed via an adhesive, the impact force received by the steel piece 11 is in the axial direction, thus ensuring high reliability.

[0043] One end of the first pin shaft 631 is fixed in the bearing 15 by welding. The other end of the first pin shaft 631 is fixed to the output end of the drive unit 62. The tail of the first pin shaft 631 is fixed by adopting a ball bearing and is fixed by a specially designed steel piece 11. The second pin shaft 641 may be externally sealed by the steel piece 11 while being assembled in a form of interference fit with the frame body 611. In the operation process, the second pin shaft 641 does not rotate together with the second gear 642, completely eliminating the need for both ends of the pin shaft to be fixed by the bearings 15, reducing the frictional force between the pin shaft and the bearings 15, reducing the number of parts and the assembly cost due to the assembly of the bearings 15 and the frame body 611, and preventing the geometric tolerance from increasing when there are many parts, resulting in high accuracy and efficiency.

[0044] In this embodiment, the frame body 611, the extending part 612, and the ring gear structure 10 are of an integrally formed structure, effectively simplifying the structural volume and reducing the difficulty of assembly and the component cost.

[0045] In this embodiment, the frame 61 is made of a plastic material, which can reduce the weight of the mechanism, contribute to reducing the operating noise of the module, reduce the stress of the head-mounted VR glasses, and improve the experience.

[0046] It should be noted that when the shown first gear / rack and the second gear / rack are interchanged, that is, when the drive unit is connected to the current second gear, the technical effects of the present invention can be realized in the same way and belong to the protection scope of the present invention.

[0047] Compared with related technologies, in the interpupillary distance adjustment device of the present invention, one end of the first rack close to the first lens module is fixed to one side of the first lens module, and one end of the second rack close to the second lens module is fixed to one side of the second lens module. The first rack and the second rack are parallel. The first gear member includes a first pin shaft fixed to the drive unit and a first gear fixed to the first pin shaft. The second gear member includes a second pin shaft rotatably installed on the frame and a second gear fixed to the second pin shaft. The number of teeth of the first gear is smaller than the number of teeth of the second gear. By driving and rotating the first pin shaft by the drive unit to rotate the first gear, and rotating the first rack and the second gear respectively by the rotation of the first gear, thereby, the second rack is also moved synchronously in the direction facing each other or away from each other with the rotation of the second gear along with the first rack and the second rack, realizing the automatic adjustment of the interpupillary distance between the first lens module and the second lens module, with high adjustment accuracy, small volume occupancy, high stability, and good user experience effect.

[0048] The above are only embodiments of the present invention, and those skilled in the art can make improvements without departing from the idea of the present invention, but it should be pointed out that all of these belong to the protection scope of the present invention.

Claims

1. An interpupillary distance adjustment device applied to a VR glasses, wherein the VR glasses include a spectacle frame body, a first mounting hole and a second mounting hole that penetrate the spectacle frame body and are spaced apart from each other, and a first lens module and a second lens module respectively mounted in the first mounting hole and the second mounting hole. The lateral aperture diameters of the first mounting hole and the second mounting hole are respectively larger than the diameters of the first lens module and the second lens module. The interpupillary distance adjustment device further includes a drive module fixed to the spectacle frame body and located between the first lens module and the second lens module. The drive module is used to drive the first lens module and the second lens module to move synchronously in a direction facing each other or away from each other so as to realize the adjustment of the interpupillary distance. The drive module includes a frame fixed to the spectacle frame body, a drive unit fixed to one side of the frame, a first gear member rotatably installed in the frame and transmission-connected to the drive unit, a second gear member rotatably installed in the frame and meshing with the first gear member, a first rack meshing with the first gear member, and a second rack meshing with the second gear member. One end of the first rack close to the first lens module is fixed to one side of the first lens module, and one end of the second rack close to the second lens module is fixed to one side of the second lens module. The first rack and the second rack are parallel to each other. The first gear member includes a first pin shaft fixedly connected to the output end of the drive unit and a first gear fixed to the first pin shaft. The second gear member includes a second pin shaft rotatably installed in the frame and a second gear fixed to the second pin shaft. The number of teeth of the first gear is less than the number of teeth of the second gear. The interpupillary distance adjustment device is characterized in that.

2. The first rack and the second rack are arranged with a displacement, and the moving amounts of the first rack and the second rack within a unit time are the same. The interpupillary distance adjustment device according to claim 1 is characterized in that.

3. The frame includes a frame body fixed to one side of the spectacle frame body, an extending portion formed by extending from one side of the frame body close to the first lens module, a through hole penetrating the extending portion, a concave groove formed by being recessed in a direction away from the spectacle frame body from one side of the frame body close to the spectacle frame body, and a first position limiting groove and a second position limiting groove respectively penetrating the frame body and communicating with the concave groove. The drive unit is fixed in the through hole, the first gear member and the second gear member are located in the concave groove, and the first rack and the second rack are respectively installed in the first position limiting groove and the second position limiting groove. The interpupillary distance adjustment device according to claim 1 is characterized in that.

4. The first rack includes a first rack body, a first support plate extending from the first rack body in a direction approaching the spectacle frame body, and a first tooth-shaped structure extending from the first support plate in a direction approaching the spectacle frame body. One side of the first rack body away from the spectacle frame body forms a first gap at a distance from the groove wall of the first position limiting groove, and one side of the first support plate away from the spectacle frame body forms a second gap at a distance from the groove wall of the first position limiting groove. The interpupillary distance adjustment device according to claim 3 is characterized in that.

5. The interpupillary distance adjustment device according to claim 4 is characterized in that the second gap is smaller than the first gap.

6. The interpupillary distance adjustment device further includes a multi-stage planetary gearbox. The input end of the multi-stage planetary gearbox is fixedly connected to the drive unit, and the output end of the multi-stage planetary gearbox is fixedly connected to the first gear member. A ring gear structure is provided in the through hole. The multi-stage planetary gearbox is installed in the through hole, and the multi-stage planetary gearbox is rotatably installed on the ring gear structure. The interpupillary distance adjustment device according to claim 3 is characterized in that.

7. The interpupillary distance adjustment device further includes a steel piece. In the frame body, a first counterbore hole and a second counterbore hole are respectively formed to penetrate corresponding to one end of the first pin shaft and one end of the second pin shaft. On one side of the frame body away from the spectacle frame body, a mounting groove is recessed. The steel piece is installed in the mounting groove. The other end of the first pin shaft and the other end of the second pin shaft are respectively installed through the first counterbore hole and the second counterbore hole. One end of the second pin shaft close to the steel piece abuts against the steel piece. The interpupillary distance adjustment device according to claim 3, characterized in that.

8. The interpupillary distance adjustment device further includes a bearing. The bearing is fixed in the first counterbore hole. One end of the first pin shaft is fixed in the bearing, and the other end is fixed to the output end of the drive unit. The interpupillary distance adjustment device according to claim 7, characterized in that.

9. The frame body, the extending portion, and the ring gear structure are of an integrally formed structure. The interpupillary distance adjustment device according to claim 6, characterized in that.

10. The frame is made of a plastic material. The interpupillary distance adjustment device according to claim 1, characterized in that.

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