Distance adjustment device and head-mounted device

Abstract

The present application provides a distance adjusting device and a head-mounted device, the distance adjusting device comprising a first base, on which a first connecting member is arranged; a second base, the second base is slidably connected to the first base, and the second base is provided with a second connecting member, the first connecting member cooperates with the second connecting member, when the first base slides relative to the second base, the first connecting member drives the second connecting member to move, and the second base is fixedly provided with a first magnetic attraction portion; a stop frame, the stop frame is movably arranged, and the second magnetic attraction portion is fixedly arranged on the stop frame; when the second magnetic attraction portion is attracted to the first magnetic attraction portion, the stop frame contacts the second connecting member, and the first base and the second base remain relatively fixed in any relative position; when the second magnetic attraction portion is no longer attracted to the first magnetic attraction portion, the stop frame is separated from the second connecting member, and the first base and the second base can slide relatively.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic devices, and in particular, relates to a distance adjustment device and a head-mounted device. Background Art

[0002] With the development of science and technology, smart head-mounted devices such as headphones, AR, VR, etc. have gradually come into people's lives. These head-mounted products are widely welcomed by people because of their portability and good user experience.

[0003] The wearing space of existing head-mounted devices is relatively fixed and cannot be used by users of different body shapes, which reduces the user experience of some users. Taking smart head-mounted headphones as an example, the distance between the two earmuffs of the head-mounted smart headphones is relatively fixed, and the distance between the two can only be adjusted by the elasticity of the support connecting the two earmuffs, and the adjustment range is small. When the headset can be used for users with medium head shapes, it cannot be used for users with small or large heads at the same time. Summary of the invention

[0004] The present application aims to provide a distance adjustment device and a head-mounted device to solve the problem that the wearing space of existing head-mounted devices is relatively fixed and cannot be used for users of different body shapes.

[0005] In a first aspect, the present application provides a distance adjustment device, comprising:

[0006] A first base, wherein a first connecting member is disposed on the first base;

[0007] a second base, the second base is slidably connected to the first base, a second connecting member is provided on the second base, the first connecting member cooperates with the second connecting member, when the first base slides relative to the second base, the first connecting member drives the second connecting member to move, and a first magnetic attraction portion is fixedly provided on the second base;

[0008] A stop frame, the stop frame is movably arranged, and a second magnetic attraction portion is fixedly arranged on the stop frame;

[0009] When the second magnetic attraction part is attracted to the first magnetic attraction part, the stop frame contacts the second connecting member, and the first base and the second base remain relatively fixed in any relative position; when the second magnetic attraction part and the first magnetic attraction part are released from attraction, the stop frame detaches from the second connecting member, and the first base and the second base can slide relative to each other.

[0010] Optionally, the first base is arranged to form a first accommodating cavity, the first connecting member is located in the first accommodating cavity, the second base is arranged to form a second accommodating cavity, the second connecting member is located in the second accommodating cavity, and the first connecting member cooperates with the second connecting member in the second accommodating cavity.

[0011] Optionally, the distance adjustment device further comprises an elastic member, wherein the elastic member is connected to the stop frame;

[0012] When the second magnetic attraction portion is attracted to the first magnetic attraction portion, the elastic member is deformed and the stop frame contacts the second connecting member; when the second magnetic attraction portion is no longer attracted to the first magnetic attraction portion, the elastic member is reset and the stop frame is separated from the second connecting member.

[0013] Optionally, the distance adjusting device further comprises a guide assembly, and the stop frame can be slidably disposed on the guide assembly.

[0014] Optionally, the first magnetic attraction part is a permanent magnet, and the second magnetic attraction part is an electromagnet. When the second magnetic attraction part is energized, the first magnetic attraction part and the second magnetic attraction part are attracted to each other.

[0015] Optionally, the first connecting member includes a rack fixedly disposed on the first base, and the second connecting member includes a gear assembly rotatably disposed on the second base, and the rack is meshed with the gear assembly.

[0016] Optionally, the second base includes a support platform, the gear assembly includes a gear and a rotating shaft fixed on the gear, the rotating shaft is located on the support platform, and the first magnetic attraction part is fixed on the support platform, and when the second magnetic attraction part is attracted to the first magnetic attraction part, the rotating shaft is clamped between the support platform and the stop frame.

[0017] Optionally, the support platform is provided with a first rotating shaft groove toward the first side of the rotating shaft, and the stop frame is provided with a second rotating shaft groove toward the first side of the rotating shaft, and when the rotating shaft is clamped between the inner wall of the first rotating shaft groove and the inner wall of the second rotating shaft groove, there is a distance between the first side of the support platform and the first side of the stop frame.

[0018] In a second aspect, the present application provides a head mounted device, comprising a first body, a second body and the above distance adjusting device, wherein the first body is arranged on the first base, and the second body is arranged on the second base;

[0019] When the second magnetic attraction portion is attracted to the first magnetic attraction portion, the first body and the second body remain relatively fixed in any relative position; when the second magnetic attraction portion is no longer attracted to the first magnetic attraction portion, the first body and the second body can move relatively.

[0020] Optionally, the head mounted device further comprises a telescopic sleeve, one end of the telescopic sleeve being fixedly disposed on the first base away from one end of the second base, and the other end of the telescopic sleeve being fixedly disposed on the second base away from one end of the first base.

[0021] Optionally, the first magnetic attraction part and / or the second magnetic attraction part is an electromagnet, and a control switch is also provided on the head mounted device. When the control switch is turned on, the electromagnet is energized, and the second magnetic attraction part is attracted to the first magnetic attraction part; when the control switch is turned off, the electromagnet is de-energized, and the second magnetic attraction part is no longer attracted to the first magnetic attraction part.

[0022] One of the technical effects of the application is that the relative position between the first base and the second base is adjusted to a predetermined position, and then the movement of the second connecting member is prevented by the contact between the stop frame and the second connecting member, so that the second connecting member and the first connecting member are relatively fixed, and the relative position between the first base and the second base is maintained at a predetermined position, which provides favorable conditions for adjusting the wearing space of the head-mounted device so that the head-mounted device can be suitable for users of different body shapes.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0025] Figure 1 is an exploded view of a head mounted device having a distance adjustment device provided by the present application;

[0026] Figure 2 is a schematic diagram of the structure of the first base;

[0027] Figure 3 is a schematic diagram of the structure of the second base;

[0028] Figure 4 It is a structural schematic diagram of the sliding connection between the first base and the second base;

[0029] Figure 5 It is an exploded view of the cover plate and the stop bracket;

[0030] Figure 6 It is a schematic diagram of the structure in which the cover plate and the stop frame are installed together;

[0031] Figure 7 It is a schematic diagram of the structure in which the first base cooperates with the second base;

[0032] Figure 8 is the first cross-sectional view of the headset;

[0033] Fig. 9 is a second cross-sectional view of the head mounted device;

[0034] Fig.10 is the third cross-sectional view of the headset;

[0035] Fig.11 It is a stereoscopic image of the head mounted device.

[0036] Reference numerals:

[0037] 1. First base; 2. Rack; 3. Second base; 4. Gear; 5. Rotating shaft; 6. First magnetic attraction part; 7. Stop frame; 8. Second magnetic attraction part; 9. Support platform; 10. First rotating shaft groove; 11. Second rotating shaft groove; 12. Cover plate; 13. Guide assembly; 14. Support member; 15. Elastic member; 16. Limiting protrusion; 17. First body; 18. Second body; 19. Telescopic sleeve. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] In a first aspect, an embodiment of the present application provides a distance adjustment device, comprising a first base 1 , a second base 3 and a stop frame 7 .

[0044] A first connecting member is arranged on the first base 1 .

[0045] The second base 3 is slidably connected to the first base 1 , and a second connecting member is provided on the second base 3 . The first connecting member cooperates with the second connecting member. When the first base 1 slides relative to the second base 3 , the first connecting member drives the second connecting member to move. A first magnetic attraction portion 6 is fixedly provided on the second base 3 .

[0046] The stop frame 7 is movably arranged, and a second magnetic attraction portion 8 is fixedly arranged on the stop frame 7 .

[0047] When the second magnetic attraction part 8 is attracted to the first magnetic attraction part 6, the stop frame 7 is in contact with the second connecting piece, and the first base 1 and the second base 3 remain relatively fixed in any relative position; when the second magnetic attraction part 8 and the first magnetic attraction part 6 are no longer attracted, the stop frame 7 is disengaged from the second connecting piece, and the first base 1 and the second base 3 can slide relative to each other.

[0048] like Figure 4 and Figure 8 As shown, the first base 1 and the second base 3 are slidably matched, and the wearing space of the head-mounted device is changed by changing the relative position relationship between the first base 1 and the second base 3, so that the head-mounted device of the present application can be suitable for users of different body shapes.

[0049] The first base 1 is provided with a first connecting member, and the second base 3 is provided with a second connecting member, and the first connecting member cooperates with the second connecting member. The first connecting member can be fixedly provided on the first base 1, and the second connecting member can be rotatably provided on the second base 3, and the movement of the first connecting member will drive the movement of the second connecting member.

[0050] When the first base 1 slides relative to the second base 3, the first connecting member drives the second connecting member to move. In other words, when the first base 1 slides relative to the second base 3, the first base 1 drives the first connecting member to move, and the movement of the first connecting member drives the second connecting member that matches it to move. That is, a linkage is formed between the first base 1, the first connecting member, and the second connecting member. At this time, if any of the above three components does not move, the other two components cannot move. For example, if the first base 1 does not slide relative to the second base 3, the first connecting member and the second connecting member also remain stationary.

[0051] The stop frame 7 is movably arranged, the first magnetic attraction portion 6 is fixedly arranged on the second base 3, and the second magnetic attraction portion 8 is fixedly arranged on the stop frame 7. When the first magnetic attraction portion 6 and the second magnetic attraction portion 8 attract each other, the second magnetic attraction portion 8 drives the stop frame 7 to move.

[0052] When the second magnetic attraction portion 8 is attracted to the first magnetic attraction portion 6, the stop frame 7 contacts the second connecting member, and the first base 1 and the second base 3 remain relatively fixed in any relative position. In other words, the second magnetic attraction portion 8 drives the stop frame 7 to move under the attraction of the first magnetic attraction portion 6, so that the stop frame 7 contacts the second connecting member, for example, the stop frame 7 clamps the second connecting member or the stop frame 7 rubs against the second connecting member, thereby preventing the second connecting member from moving, and thus preventing the first base 1 from moving relative to the second base 3.

[0053] When the second magnetic attraction portion 8 and the first magnetic attraction portion 6 are released from attraction, the stop frame 7 is separated from the second connecting member, and the first base 1 and the second base 3 can slide relative to each other. In other words, when the second magnetic attraction portion 8 and the first magnetic attraction portion 6 are released from attraction, the stop frame 7 and the second connecting member are no longer in contact, and at this time, the second connecting member can move because the restraint of the stop frame 7 is released. When the second connecting member can move, the first base 1 can slide relative to the second base 3.

[0054] The embodiment of the present application adjusts the relative position between the first base 1 and the second base 3 to a predetermined position, and then prevents the second connecting member from moving by contact between the stop frame 7 and the second connecting member, so that the second connecting member and the first connecting member are relatively fixed, thereby maintaining the relative position between the first base 1 and the second base 3 at the predetermined position, which provides favorable conditions for adjusting the wearing space of the head-mounted device so that the head-mounted device can be suitable for users of different body shapes.

[0055] Optionally, the first connecting member includes a rack 2, which is fixedly arranged on the first base 1, and the second connecting member includes a gear assembly, which is rotatably arranged on the second base 3, and the rack 2 is meshed with the gear assembly. When the first base 1 slides relative to the second base 3, the rack 2 moves synchronously with the first base 1, and the rack 2 drives the gear assembly to move. When the stop frame 7 contacts the gear assembly to limit the rotation of the gear assembly, the rack 2 meshed with the gear assembly remains stationary relative to the gear assembly, and the first base 1 on which the rack 2 is arranged is stationary relative to the second base 3. The embodiment of the present application simplifies the structural setting and can make the cooperation between the first connecting member and the second connecting member more reliable.

[0056] The stop frame 7 contacts the gear assembly and prevents the gear assembly from rotating, which can be achieved through the friction between the stop frame 7 and the gear assembly. For example, the outer surface of the stop frame 7 rubs against the gear assembly. The magnitude of the friction between the stop frame 7 and the gear assembly can be adjusted, and the adjustment method includes increasing the roughness of the friction surface of the stop frame 7 and the friction surface of the gear assembly, increasing the contact area between the stop frame 7 and the gear assembly, or increasing the contact pressure between the stop frame 7 and the gear assembly. The stop frame 7 contacts the gear assembly and prevents the gear assembly from rotating, which can also be achieved through the matching structure between the stop frame 7 and the gear assembly. For example, the stop frame 7 has a first stop tooth, and the gear assembly has a second stop tooth. When the stop frame 7 contacts the gear assembly, the first stop tooth meshes with the second stop tooth. Since the first stop tooth on the stop frame 7 is fixed relative to the second stop tooth, the first stop tooth can limit the first stop tooth from rotating with the gear assembly, thereby preventing the gear assembly from rotating. Of course, the structure of the stop frame 7 and the gear assembly can also be other structures, for example, the gear assembly includes a rotating shaft 5, part of the rotating shaft 5 is a non-rotating structure, and the stop frame 7 has a matching structure that matches the non-rotating structure. When the stop frame 7 contacts the rotating shaft 5, the matching structure is engaged with the non-rotating structure, thereby preventing the gear assembly from rotating.

[0057] Optionally, the first base 1 is arranged to form a first accommodating cavity, the first connecting member is located in the first accommodating cavity, the second base 3 is arranged to form a second accommodating cavity, the second connecting member is located in the second accommodating cavity, and the first connecting member cooperates with the second connecting member in the second accommodating cavity, so that the first base 1 and the second base 3 can respectively protect the first connecting member and the second connecting member, and at the same time, the cooperation between the first connecting member and the second connecting member is not affected by the external environment, thereby ensuring the reliability of the working of the embodiment of the present application.

[0058] Specifically, Figures 2 to 4 As shown, the first base 1 includes a first substrate, one side of the first substrate has first side walls arranged opposite to each other, the first substrate and the two first side walls are arranged to form a first accommodating cavity, and the first connecting member is located in the first accommodating cavity. The second base 3 includes a second substrate, the second substrate has second side walls arranged opposite to each other, a bottom plate is provided between the two second side walls, the second substrate, the two second side walls and the bottom plate are arranged to form a second accommodating cavity, and the second connecting member is located in the second accommodating cavity.

[0059] Furthermore, the first side wall is bent away from the bottom plate to form a second slide groove, and the second side wall can be inserted into and slide in the second slide groove, which is conducive to the relative sliding between the first base 1 and the second base 3, and avoids the first base 1 and the second base 3 from being separated from each other. Of course, the first base 1 and the second base 3 can also be other structures that can achieve relative sliding between the two, which will not be repeated here.

[0060] Further, the first connecting member includes a rack 2, and the second connecting member includes a gear assembly. The two first side walls and the rack 2 can slide relative to the two second side walls and the bottom plate respectively, wherein when the rack 2 slides along the inner surface of the bottom plate, the rack 2 can mesh with the gear assembly and drive the gear assembly to rotate.

[0061] Furthermore, the bottom plate is provided with a first slide rail, and the first slide rail is adapted to the rack 2, so that the rack 2 can slide on the first slide rail. A bearing is arranged between the rack 2 and the first slide rail, which is conducive to reducing the friction between the rack 2 and the first slide rail, and is convenient for the user to adjust the relative position between the first base 1 and the second base 3. The first slide rail can specifically include two first rails, the first rails are L-shaped structures, the two first rails are arranged in parallel on the bottom plate, and the two first rails and the bottom plate are surrounded to form a first slide groove, and the rack 2 can be inserted into the first slide groove and slide in the first slide groove.

[0062] Optionally, the distance adjustment device further includes an elastic member 15, and the elastic member 15 is connected to the stop frame 7;

[0063] When the second magnetic attraction portion 8 and the first magnetic attraction portion 6 are attracted to each other, the elastic member 15 is deformed, and the stop frame 7 contacts the second connecting member; when the second magnetic attraction portion 8 and the first magnetic attraction portion 6 are no longer attracted to each other, the elastic member 15 is reset, and the stop frame 7 is separated from the second connecting member. In the embodiment of the present application, when the second magnetic attraction portion 8 and the first magnetic attraction portion 6 are no longer attracted to each other, the stop frame 7 can be separated from the second connecting member by itself, and the first base 1 and the second base 3 can slide smoothly relative to each other.

[0064] Optionally, the distance adjustment device further includes a guide assembly 13, and the stop frame 7 can be slidably disposed on the guide assembly 13. When the second magnetic attraction portion 8 is attracted to the first magnetic attraction portion 6, the guide assembly 13 can guide the stop frame 7 so that the stop frame 7 can reliably contact the second connecting member, ensuring that the second connecting member cannot move under the action of the stop frame 7.

[0065] Optionally, the second base 3 includes a support platform 9, the gear assembly includes a gear 4 and a rotating shaft 5 fixed on the gear 4, the rotating shaft 5 is located on the support platform 9, and the first magnetic attraction portion 6 is fixed on the support platform 9. When the second magnetic attraction portion 8 is attracted to the first magnetic attraction portion 6, the rotating shaft 5 is clamped between the support platform 9 and the stop frame 7. Among them, the support platform 9 can be a component specially provided for clamping the rotating shaft 5. In this case, the rotating shaft 5 of the gear assembly can extend to the support platform 9 of the second base 3. When the second magnetic attraction portion 8 drives the stop frame 7 to approach the support platform 9, the stop frame 7 and the support platform 9 clamp the rotating shaft 5 to limit the freedom of the gear assembly to rotate in the axial direction, so as to ensure that the relative position relationship between the first base 1 and the second base 3 can be stably maintained.

[0066] Alternatively, if Fig.10 As shown, the support platform 9 is provided with a first shaft groove 10 toward the first side of the shaft 5, and the stop frame 7 is provided with a second shaft groove 11 toward the first side of the shaft 5. When the shaft 5 is clamped between the inner wall of the first shaft groove 10 and the inner wall of the second shaft groove 11, there is a distance between the first side of the support platform 9 and the first side of the stop frame 7.

[0067] That is, the rotating shaft 5 is located in the first rotating shaft groove 10 opened on the first side of the support platform 9, and at least part of the rotating shaft 5 protrudes from the surface of the first side of the support platform 9. When the support frame is close to the support platform 9 and the rotating shaft 5 is clamped, the rotating shaft 5 protruding from the first side surface of the support platform 9 is located in the second rotating shaft groove 11 opened on the stop frame 7 and contacts the inner surface of the second rotating shaft groove 11. At this time, the first side of the support platform 9 is not in contact with the first side of the stop frame 7. That is, the sum of the maximum depth of the first rotating shaft groove 10 and the maximum depth of the second rotating shaft groove 11 is less than the diameter of the rotating shaft 5. The rotating shaft 5 can be reliably clamped between the support platform 9 and the stop frame 7, avoiding the situation that the first side of the support platform 9 is already in contact with the first side of the stop frame 7, but the rotating shaft 5 is not in contact with the inner surface of the first rotating shaft groove 10 and the inner surface of the second rotating shaft groove 11, and the gear assembly cannot be prevented from rotating. Among them, the cross-sectional shapes of the first shaft groove 10 and the second shaft groove 11 are both arc-shaped structures, which can provide certain support and limit functions for the shaft 5, and can also increase the contact area between the stop frame 7 and the shaft 5, thereby effectively preventing the rotation of the gear assembly.

[0068] Alternatively, if Figure 5 and Figure 6 As shown, the second base 3 further includes a cover plate 12, which is fixedly arranged on the support platform 9, and the cover plate 12 and the support platform 9 define a rotation space, and the gear assembly is located in the rotation space. The structure is simple and the gear assembly is easy to install.

[0069] Specifically, the support platform 9 includes a first support portion and a second support portion, which are arranged opposite to each other on the bottom plate of the second base 3, and the rack 2 slides between the first support portion and the second support portion. The first support portion and the second support portion are respectively provided with a first shaft groove 10 in a direction perpendicular to the rack 2. Fig. 9As shown, the gear 4 has a rotating shaft 5 on both sides, the length of the rotating shaft 5 on the first side of the gear 4 is greater than the length of the rotating shaft 5 on the second side of the gear 4, and the rotating shafts 5 on both sides of the gear 4 are respectively placed in the first rotating shaft grooves 10 opened on the first supporting part and the second supporting part. The cover plate 12 includes a wheel cover formed by bending and extending the two ends of the plate-like structure to the same side, and the two ends of the wheel cover have mounting parts, and the two mounting parts are respectively provided with third rotating shaft 5 grooves. The cover plate 12 is fixed on the support platform 9 so that the first rotating shaft groove 10 corresponds to the third rotating shaft 5 groove one by one. The rotating shaft 5 with a longer length extends out of the third rotating shaft 5 groove, and the rotating shaft 55 extending out of the third rotating shaft 5 groove is sandwiched between the support platform 9 and the stop frame 7. Under the condition of reliably supporting the rotating shafts 5 on both sides of the gear 4, the stop frame 7 can contact with the rotating shaft 5, and the stop frame 7 can be kept away from the gear 4 where the rotating shaft 5 is set, so as to avoid the contact between the stop frame 7 and the gear 4.

[0070] Furthermore, if Figure 5 As shown, the cover plate 12 has a guide assembly 13, and the stop frame 7 can be slidably arranged on the guide assembly 13, which can make the structure compact and easy to assemble. Among them, the cover plate 12 and the guide assembly 13 can be integrally formed, which is easy to manufacture, simplifies the installation steps, and saves installation time.

[0071] Furthermore, the cover plate 12 is provided with a support member 14, the support member 14 is opposite to the support platform 9, the stop frame 7 is located between the support member 14 and the support platform 9, and the support member 14 and the stop frame 7 are connected by an elastic member 15; when the second magnetic attraction portion 8 is attracted to the first magnetic attraction portion 6, the elastic member 15 is deformed, and the second magnetic attraction portion 8 is close to the first magnetic attraction portion 6; when the second magnetic attraction portion 8 is de-attracted from the first magnetic attraction portion 6, the elastic member 15 is reset, driving the second magnetic attraction portion 8 away from the first magnetic attraction portion 6. Only by controlling the first magnetic attraction portion 6 and the second magnetic attraction portion 8 to attract and de-attract each other, it is possible to prevent the rotation of the gear assembly and not prevent the rotation of the gear assembly, and the implementation process is simple. For example, when the first magnetic attraction portion 6 is a permanent magnet and the second magnetic attraction portion 8 is an electromagnet, it can be achieved by controlling the power on and off of the second magnetic attraction portion 8 of the electromagnet. Of course, it can also be that the first magnetic attraction portion 6 is an electromagnet and the second magnetic attraction portion 8 is a permanent magnet.

[0072] Specifically, Figure 7As shown, the mounting portion on the cover plate 12 extends out a supporting side wall, and a supporting member 14 extends out from the end of the supporting side wall, and the side of the supporting member 14 facing the stop frame 7 has a first mounting rib. The side of the stop frame 7 facing the support member 14 has a second mounting rib, and the first mounting rib and the second mounting rib are connected by a spring. When the shrink spring is in an initial state without being stretched, the stop frame 7 is away from the support member 14. Among them, the stop frame 7 is provided with a first groove on the side facing the support member 14, and the second magnetic attraction portion 8 is installed in the first groove. The support platform 9 is provided with a second groove on the side facing the stop member, and the first magnetic attraction portion 6 is installed in the second groove.

[0073] Optionally, the first magnetic attraction part 6 is a permanent magnet, and the second magnetic attraction part 8 is an electromagnet. When the second magnetic attraction part 8 is powered on, the first magnetic attraction part 6 and the second magnetic attraction part 8 attract each other. By controlling the on and off of the electromagnet, it is possible to control whether the first magnetic attraction part 6 and the second magnetic attraction part 8 attract each other or release the attraction, which is convenient for control. At the same time, only setting one of the magnetic attraction parts as an electromagnet can simplify the circuit and save costs.

[0074] Optionally, the end of the rack 2 facing the gear assembly has a limiting protrusion 16, and the limiting protrusion 16 is higher than the tooth top of the rack 2. When the meshing of the gear 4 and the rack 2 is close to the end of the rack 2, the limiting protrusion 16 can block the meshing of the rack 2 and the gear 4, preventing the rack 2 from being disengaged from the gear 4, thereby ensuring the reliability of the position adjustment between the first base 1 and the second base 3.

[0075] In a second aspect, an embodiment of the present application provides a head mounted device, comprising a first body 17, a second body 18 and the above distance adjusting device, wherein the first body 17 is disposed on a first base 1, and the second body 18 is disposed on a second base 3;

[0076] When the second magnetic attraction portion 8 is attracted to the first magnetic attraction portion 6 , the first body 17 and the second body 18 remain relatively fixed in any relative position; when the second magnetic attraction portion 8 and the first magnetic attraction portion 6 are released from attraction, the first body 17 and the second body 18 can move relative to each other.

[0077] The embodiment of the present application can change the distance between the first body 17 and the second body 18 by adjusting the relative position between the first base 1 and the second base 3, thereby adjusting the wearing space of the head-mounted device, so that the head-mounted device can adapt to users of different body shapes.

[0078] Alternatively, if Figure 1 and Fig.11As shown, the head-mounted device further includes a telescopic sleeve 19, one end of which is fixedly arranged on the first base 1 away from one end of the second base 3, and the other end of the telescopic sleeve 19 is fixedly arranged on the second base 3 away from one end of the first base 1. The first base 1 and the second base 3 can be covered by the telescopic sleeve 19, so that the telescopic sleeve 19 can protect the distance adjustment device. The side wall of the telescopic sleeve 19 is a wave-like structure extending in the axial direction. When the first base 1 and the second base 3 slide relative to each other, the telescopic sleeve 19 can be extended or shortened in the axial direction accordingly.

[0079] Optionally, the first magnetic attraction portion 6 and / or the second magnetic attraction portion 8 is an electromagnet, and a control switch is further provided on the head mounted device. When the control switch is turned on, the electromagnet is energized, and the second magnetic attraction portion 8 is attracted to the first magnetic attraction portion 6; when the control switch is turned off, the electromagnet is de-energized, and the second magnetic attraction portion 8 is no longer attracted to the first magnetic attraction portion 6. This allows the customer to conveniently control the wearing space of the head mounted device.

[0080] Furthermore, the control switch is disposed on the first body 17 or the second body 18 , so that the user can easily touch the control switch, thereby improving the user experience.

[0081] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A distance adjustment device, characterized in that: include: A first base, wherein a first connecting member is disposed on the first base; a second base, the second base is slidably connected to the first base, a second connecting member is provided on the second base, the first connecting member cooperates with the second connecting member, when the first base slides relative to the second base, the first connecting member drives the second connecting member to move, and a first magnetic attraction portion is fixedly provided on the second base; A stop frame, the stop frame is movably arranged, and a second magnetic attraction portion is fixedly arranged on the stop frame; The second base comprises a support platform, and the first magnetic attraction portion is fixed on the support platform; The second connecting member includes a rotating shaft, and the rotating shaft is located on the supporting platform; The support platform is provided with a first shaft groove toward the first side of the shaft, the stop frame is provided with a second shaft groove toward the first side of the shaft, and the sum of the maximum depth of the first shaft groove and the maximum depth of the second shaft groove is less than the diameter of the shaft; When the second magnetic attraction part is attracted to the first magnetic attraction part, the stop frame is in contact with the second connecting member, and the rotating shaft is clamped between the inner wall of the first rotating shaft groove and the inner wall of the second rotating shaft groove; the first base and the second base remain relatively fixed in any relative position; when the second magnetic attraction part and the first magnetic attraction part are no longer attracted, the stop frame is detached from the second connecting member, and the first base and the second base can slide relative to each other.

2. The distance adjustment device according to claim 1, characterized in that: The first base is arranged to form a first accommodating cavity, the first connecting member is located in the first accommodating cavity, the second base is arranged to form a second accommodating cavity, the second connecting member is located in the second accommodating cavity, and the first connecting member cooperates with the second connecting member in the second accommodating cavity.

3. The distance adjustment device according to claim 1, characterized in that: The distance adjustment device also includes an elastic member, and the elastic member is connected to the stop frame; When the second magnetic attraction portion is attracted to the first magnetic attraction portion, the elastic member is deformed and the stop frame contacts the second connecting member; when the second magnetic attraction portion is no longer attracted to the first magnetic attraction portion, the elastic member is reset and the stop frame is separated from the second connecting member.

4. The distance adjustment device according to claim 1, characterized in that: The distance adjusting device also includes a guide assembly, and the stop frame can be slidably arranged on the guide assembly.

5. The distance adjustment device according to claim 1, characterized in that: The first magnetic attraction part is a permanent magnet, and the second magnetic attraction part is an electromagnet. When the second magnetic attraction part is energized, the first magnetic attraction part and the second magnetic attraction part are attracted to each other.

6. The distance adjustment device according to claim 1, characterized in that: The first connecting member includes a rack fixedly disposed on the first base, and the second connecting member includes a gear assembly rotatably disposed on the second base, and the rack is meshed with the gear assembly.

7. The distance adjustment device according to claim 6, characterized in that: The gear assembly comprises a gear and a rotating shaft fixed on the gear.

8. The distance adjustment device according to claim 7, characterized in that: When the rotating shaft is sandwiched between the inner wall of the first rotating shaft groove and the inner wall of the second rotating shaft groove, a gap is provided between the first side of the supporting platform and the first side of the stopping frame.

9. A head mounted device, characterized in that: It comprises a first body, a second body and the distance adjustment device according to any one of claims 1 to 8, wherein the first body is arranged on the first base, and the second body is arranged on the second base; When the second magnetic attraction portion is attracted to the first magnetic attraction portion, the first body and the second body remain relatively fixed in any relative position; when the second magnetic attraction portion is no longer attracted to the first magnetic attraction portion, the first body and the second body can move relatively.

10. The head mounted device according to claim 9, characterized in that: The head mounted device further comprises a telescopic sleeve, one end of which is fixedly arranged on the first base away from one end of the second base, and the other end of which is fixedly arranged on the second base away from one end of the first base.

11. The head mounted device according to claim 9, characterized in that: The first magnetic attraction part and / or the second magnetic attraction part is an electromagnet, and a control switch is also provided on the head mounted device. When the control switch is turned on, the electromagnet is energized, and the second magnetic attraction part is attracted to the first magnetic attraction part; when the control switch is turned off, the electromagnet is de-energized, and the second magnetic attraction part is no longer attracted to the first magnetic attraction part.

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