Diopter adjusting structure and intelligent wearable device

Abstract

The embodiment of the utility model provides a diopter adjusting structure and intelligent wearable equipment. The diopter adjusting structure comprises: a rotating part; the extension part is fixedly connected to one side of the rotating part; the transmission part is in clearance fit with the extension part, and the transmission part is driven by the rotating part to rotate; and the display part is in transmission connection with the transmission part, so that the display part is driven by the rotary motion of the transmission part to move along the axial direction of the transmission part.

Description

Technical Field

[0001] The present disclosure relates to the field of diopter adjustment and smart wearable devices, and in particular, to a diopter adjustment structure, a smart wearable device and an assembly method thereof. Background Art

[0002] This section is intended to provide background information relevant to understanding the various technologies described herein. As implied by the title of this section, this is a discussion of related technologies that should not in any way imply that they are necessarily prior art. Therefore, it should be understood that any statement in this section should be read from this perspective, rather than any admission of prior art.

[0003] Smart wearable devices, such as smart glasses, are becoming more and more popular. Some functions involve knob control (such as adjusting the diopter with a knob). In the knob area, the design gap between the exposed knob and the surrounding components (design and assembly) is a difficult point. The accessories of smart glasses have tolerances, including component tolerances and assembly tolerances. The accumulation of these tolerances will lead to uneven final gaps between the knobs and surrounding components, and the reserved gaps in the design cannot be too small, which will affect the appearance. Utility Model Content

[0004] According to one aspect of the present disclosure, there is provided:

[0005] A diopter adjustment structure, comprising:

[0006] Rotating part;

[0007] An extension portion, fixedly connected to one side of the rotating portion;

[0008] A transmission part is loosely matched with the extension part, and the transmission part rotates under the drive of the rotating part; and

[0009] The display part is transmission-connected to the transmission part, so that the display part moves along the axial direction of the transmission part under the drive of the rotational movement of the transmission part.

[0010] According to an embodiment of the present disclosure, the extension portion and the transmission portion are clearance-fitted in the axial direction of the transmission portion and in the radial direction of the transmission portion.

[0011] According to an embodiment of the present disclosure, the rotating portion is adhesively connected to the extension portion.

[0012] According to one embodiment of the present disclosure, the display unit includes an adjusting movable part, a display screen arranged on the adjusting movable part, and a lens for transmitting image light emitted from the display screen. The adjusting movable part is connected to the transmission unit in a transmission manner, and the display screen and the lens move together under the drive of the adjusting movable part.

[0013] According to an embodiment of the present disclosure, the diopter adjustment structure further includes a guide column, and the guide column passes through the adjusting movable part.

[0014] According to an embodiment of the present disclosure, one of the extension portion and the transmission portion is configured with a groove, and the other is configured with a convex rib, and the groove and the convex rib are clearance-matched.

[0015] According to an embodiment of the present disclosure, the transmission part is configured as a screw, and the screw includes:

[0016] A connecting portion, which is clearance-matched with the extension portion;

[0017] A bare rod section connected to the connecting portion;

[0018] A spiral portion connected to the light rod segment and connected to the display portion in a spiral transmission manner;

[0019] Wherein, a flange is arranged between the connecting portion and the polished rod segment, and the flange extends outward in the radial direction of the screw rod.

[0020] According to an embodiment of the present disclosure, the connecting portion is provided with the groove, and the extended portion is provided with the rib.

[0021] According to an embodiment of the present disclosure, the convex rib is formed with a fitting portion that becomes thinner in a direction away from the rotating portion.

[0022] According to one embodiment of the present disclosure, the extended portion includes a first portion and a second portion extending in the axial direction of the first portion, the radial outer dimension of the second portion is larger than the radial outer dimension of the first portion, and a recess is formed at the end of the second portion away from the first portion, the recess extends toward the first portion and is at least partially formed in the first portion, and the rib is arranged in the recess.

[0023] According to another aspect of the present disclosure, a smart wearable device is provided, comprising any one of the above-mentioned diopter adjustment structures.

[0024] According to an embodiment of the present disclosure, the smart wearable device further includes:

[0025] A first part and a second part, the rotating part and the extending part are arranged in the first part, the transmission part and the display part are arranged in the second part, and the diopter adjustment structure also includes an elastomer, and the elastomer is arranged between the first part and the rotating part.

[0026] According to an embodiment of the present disclosure, the first part includes an upper shell, and the second part includes a lower shell, a bracket fixedly connected to the lower shell, and a transmission part cover fixed to the lower shell and arranged between the bracket and the transmission part.

[0027] According to one embodiment of the present disclosure, the extension portion includes a first portion and a second portion extending in the axial direction of the first portion, the radial outer dimension of the second portion is larger than the radial outer dimension of the first portion, and the end surface of the second portion facing away from the first portion can abut against the bracket.

[0028] According to an embodiment of the present disclosure, the second portion is formed with a lap portion extending outward, and the lap portion is snap-fitted with the first portion.

[0029] According to another aspect of the present disclosure, a method for assembling the smart wearable device is provided, wherein the method for assembling the smart wearable device comprises the following steps:

[0030] Install the extension part into the first part from top to bottom;

[0031] Install the transmission part together with the second part into the first part from top to bottom;

[0032] Arranging the elastic body on the first portion and sleeved on the extension portion;

[0033] The rotating part is fixedly sleeved on the extension part and arranged on the elastic body so that the elastic body is compressed;

[0034] The elastic body presses the rotating part together with the extension part outwards, so that the extension part and the transmission part are loosely matched. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other features of the present disclosure will become apparent with reference to the accompanying drawings, in which:

[0036] Figure 1 A cross-sectional view of a smart wearable device in a diopter adjustment structure region according to an embodiment of the present disclosure is shown;

[0037] Figure 2 Shown based on Figure 1 A partial enlarged view of the internal parts;

[0038] Figure 3 A schematic diagram of the peripheral gap of a rotating part of a diopter adjustment structure according to an embodiment of the present disclosure is shown;

[0039] Figure 4 A diagram showing a matching relationship between an extension portion and a transmission portion according to an embodiment of the present disclosure is shown;

[0040] Figure 5 A schematic cross-sectional view of a diopter adjustment structure according to an embodiment of the present disclosure is shown;

[0041] Figure 6 A working principle diagram of a display part of a diopter adjustment structure according to an embodiment of the present disclosure is shown;

[0042] Figure 7 A schematic structural diagram of a guide post of a diopter adjustment structure according to an embodiment of the present disclosure is shown;

[0043] Figure 8 A schematic structural diagram of a transmission part of a diopter adjustment structure according to an embodiment of the present disclosure is shown;

[0044] Fig. 9 A schematic structural diagram of an extension portion of a diopter adjustment structure according to an embodiment of the present disclosure is shown;

[0045] Fig.10 A diagram showing the matching relationship between a convex rib and a concave groove according to an embodiment of the present disclosure is shown;

[0046] Fig.11 A schematic structural diagram of a smart wearable device according to an embodiment of the present disclosure is shown;

[0047] Fig.12 A cross-sectional view of a smart wearable device in a diopter adjustment structure region according to an embodiment of the present disclosure is shown;

[0048] Fig.13 A flow chart of an assembly method according to an embodiment of the present disclosure is shown;

[0049] Fig.14 A cross-sectional view corresponding to step S1 of an assembly method according to an embodiment of the present disclosure is shown;

[0050] Fig.15 A cross-sectional view corresponding to step S2 of an assembly method according to an embodiment of the present disclosure is shown; and

[0051] Fig.16 A cross-sectional view corresponding to step S4 of an assembly method according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0052] It is easy to understand that according to the technical solution of the present disclosure, without changing the essential spirit of the present disclosure, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present disclosure, and should not be regarded as the entirety of the present disclosure or as a limitation or restriction to the technical solution of the present disclosure.

[0053] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for description and distinction purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components.

[0054] refer to Figures 1 to 4 ,in, Figure 1 A cross-sectional view of a smart wearable device in a diopter adjustment structure region according to an embodiment of the present disclosure is shown; Figure 2 Shown based on Figure 1 A partial enlarged view of the internal parts; Figure 3 A schematic diagram showing the peripheral gap of a rotating part of a diopter adjustment structure according to an embodiment of the present disclosure; and Figure 4 A diagram showing the matching relationship between an extension portion and a transmission portion according to an embodiment of the present disclosure is shown.

[0055] The diopter adjustment structure 100 includes: a rotating part 1; an extension part 2, fixedly connected to one side of the rotating part 1; a transmission part 3, which is clearance-matched with the extension part 2, and the transmission part 3 rotates under the drive of the rotating part 1; and a display part 4, which is transmission-connected to the transmission part 3, so that the display part 4 moves along the axial direction of the transmission part 3 under the drive of the rotational movement of the transmission part 3.

[0056] According to the above technical solution, it should be understood that, during operation, the rotation of the rotating part drives the rotation of the extension part fixedly connected thereto, which in turn drives the rotation of the transmission part, and then drives the movement of the display part along the axial direction of the transmission part. Through this axial movement, the diopter adjustment can be achieved. It should also be understood that, since the diopter and the focal length have a corresponding relationship (inverse relationship), the diopter adjustment can sometimes be referred to as the focal length adjustment, and therefore the diopter adjustment structure can also be understood as a focusing structure.

[0057] It should be noted that the clearance fit between the transmission part and the extension part refers to a state where there is a gap between the two or they are completely separated, but it does not mean that they are always completely separated from each other. For example, during work, the two still need to be in contact at least partially. For example, the minimum clearance between at least part of the matching parts of the transmission part and the extension part is equal to 0, so as to achieve the transmission of the rotational motion of the extension part to the transmission part. It can be seen that through this clearance fit, the accumulated tolerances (including position tolerances, angle tolerances, etc.) accumulated from the transmission part or the peripheral parts connected thereto are absorbed by the clearance fit, so that the tolerances from the extension part can be reset (without tolerance constraints, without tolerance accumulation constraints), and finally, for example, the accumulated tolerances of the rotating part (such as a knob for triggering the diopter adjustment function) used as an appearance part for interacting with the user can be effectively and significantly controlled, retaining the matching of the minimum number of components as much as possible, reducing the accumulation of tolerances of multiple components, and making the rotating part have more flexible design possibilities of position (including direction), size, etc., and the rotational motion transmission effect of the extension part and the transmission part is better. For example, due to the reduction of tolerance accumulation, the assembly gap between the rotating part area and the surrounding parts (exemplarily as Figure 1 and Figure 3 The components (indicated by the label G) can be made as small and more uniform as possible, making the overall appearance more coordinated and beautiful.

[0058] In some embodiments, the transmission relationship between the transmission part and the display part includes the conversion of the rotational motion of the transmission part into the axial motion of the display part in the axial direction of the transmission part. This change of motion state can be achieved through a variety of mechanical transmission methods. For example, the two are connected by a spiral transmission method, wherein the transmission part and the display part are respectively provided with threads, for example, the transmission part is provided with an external thread, and the part where the display part and the transmission part are coupled is provided with an internal thread that cooperates with the external thread. Here, the part where the display part and the transmission part are coupled can be regarded as a component that realizes the nut function or includes a nut structure to realize the nut function, and the transmission part corresponds to a component including a screw. Although not explained in detail in the present disclosure, other mechanical transmission methods, such as rack and pinion transmission, cam transmission, crank slider transmission, etc., can also be applied. In practical applications, which method can be selected according to specific needs, space limitations, precision requirements and cost factors.

[0059] Combination Figure 4 In some embodiments of the present disclosure, the extension portion 2 and the transmission portion 3 are clearance-matched in the axial direction of the transmission portion 3 and in the radial direction of the transmission portion 3, thereby making the absorption effect of the cumulative tolerance more prominent. Therefore, the technical effect that can be achieved by the clearance fit as described above is more significant. Among them, the clearance fit in the radial direction can also be combined with Fig.10 For a better understanding, that is, in the circumferential direction of the transmission part, there is a clearance fit between the transmission part and the extension part.

[0060] As mentioned above, the rotating part and the extension part are fixedly connected so as to convert the rotational motion of the rotating part into the rotational motion of the extension part. There are various ways of fixed connection. In some embodiments of the present disclosure, the rotating part 1 is adhesively connected to the extension part 2. Among them, the characteristics of the adhesive connection include high reliability, simple structure, convenience and ease of use, good plasticity, strong corrosion resistance, etc. Specifically, gluing can include gluing or back glue, etc., wherein gluing includes the application of liquid glue, and back glue includes the application method of double-sided tape. The connection between the two can be achieved by gluing on one of the rotating part or the extension part, or by gluing these two parts at the same time. In addition, the fixed connection can also be achieved by other methods, such as threaded connection, welding connection, snap connection, pin connection, riveting, plug connection, etc., which can be flexibly selected according to connection requirements, material properties, working environment and other factors.

[0061] In addition, the rotating part and the extension part can be constructed as separate parts, and the fixed connection can be achieved by a detachable connection. Therefore, in the process of future maintenance, the rotating part can be removed to achieve maintenance, repair or replacement of the rotating part alone. Alternatively, the rotating part and the extension part can be constructed as an integral part or connected into an integral part by a non-detachable method. The integrated design has good safety, stability, strength and good impact resistance, and also has the advantages of easy assembly.

[0062] refer to Figure 5 and Figure 6 ,in, Figure 5 A schematic cross-sectional view showing a structure of a diopter adjustment structure according to an embodiment of the present disclosure; and Figure 6 A working principle diagram of a display portion of a diopter adjustment structure according to an embodiment of the present disclosure is shown.

[0063] See also Figure 5 As shown, the display unit 4 includes an adjusting movable part 41, a display screen 42 arranged on the adjusting movable part 41, and a lens 43 for transmitting image light emitted from the display screen 42. The adjusting movable part 41 is transmission-connected to the transmission part 3, and the display screen 42 and the lens 43 move together under the drive of the adjusting movable part 41.

[0064] This technical solution provides a design example of a display unit, and how to adjust the diopter through the movement of the display unit. Among them, the adjusting movable part can move along the axial direction of the transmission part under the drive of the rotational movement of the transmission part, and the adjusting movable part is also used as a support for arranging and supporting the display screen and the lens. The adjusting movable part is provided with a through hole, and the through hole is provided with an internal thread that cooperates with the transmission part, so as to realize the above-mentioned transmission connection and motion transmission with the transmission part. In addition, image light can be understood as light with image information, which can be transmitted to the user's retina through coaxial air guide (BirdBath, BB) optical technology to achieve imaging in the human eye. For example, in the application of smart glasses, this enables the user to see virtual enhanced information without affecting the user's observation of the real scene. It should also be understood that in the application of smart glasses, the display screen and the lens can be combined to be called an optical machine or light engine.

[0065] Combination Figure 6 , briefly introduces the way of diopter adjustment. The display screen is drawn in: used to provide image light for imaging; lens: can magnify and optically correct the image on the display screen; 45° flat mirror M1: used to reflect the first incident light to the curved reflector, transmit the second incident light, and make it enter the human eye P; curved reflector M2: reflect the light reflected by the 45° flat mirror to the 45° flat mirror again. The specific optical principle is that the image light emitted by the display screen is first transmitted through the lens, and then through the 45° flat mirror. After the light passes through the 45° flat mirror for the first time, it is reflected onto the concave reflection surface of the curved reflector, and then reflected by the concave surface of the curved reflector, thus entering the 45° flat mirror for the second time. The image light that enters the 45° flat lens for the second time will directly pass through the 45° flat mirror, thus entering the human eye for imaging.

[0066] Based on this, combined with the technical solution, it can be known that since the display screen and the lens move together, the relative positions of the two remain unchanged during the movement, so the angle of the light transmitted from the lens remains unchanged, and only the area where the image light emitted from the lens is reflected by the 45° flat mirror changes, thereby achieving diopter adjustment. Moreover, during this adjustment process, the change to this area is very small, so the impact on the size of the final image is also very small, which can ensure that the final image will not be greatly reduced. This solution can ensure that within the diopter adjustment range, even for wearers with different degrees, the final size of the picture viewed is basically the same, and there will be no difference in viewing experience; even for wearers with a large difference in the degree of the two eyes, it is relatively convenient and fast to perform binocular combination, and the display effect after the combination is relatively clear, with a better wearing experience.

[0067] refer to Figure 7, which shows a schematic structural diagram of a guide column of a diopter adjustment structure according to an embodiment of the present disclosure.

[0068] The diopter adjustment structure 100 further includes a guide post 5, which passes through the adjustment movable member 41 (see also Fig.12 ). For this purpose, the adjusting movable part can be provided with a through opening (a different part from the through hole for cooperating with the transmission part). In the process of the adjusting movable part moving along the axial direction of the transmission part, the guide column can limit or guide this axial movement, so that the adjusting movable part will not rotate. For this purpose, the guide column can be configured as a cylinder, and a plurality of guide columns can be provided so as to achieve a multi-directional and stable guiding effect in a cost-effective manner. The guide column is exemplarily connected to the lower shell to be described below, and of course it can also be configured at other parts of the smart wearable device.

[0069] refer to Figures 8 to 10 ,in, Figure 8 A schematic structural diagram of a transmission part of a diopter adjustment structure according to an embodiment of the present disclosure is shown; Fig. 9 A schematic structural diagram showing an extension portion of a diopter adjustment structure according to an embodiment of the present disclosure; and Fig.10 A diagram showing the matching relationship between a convex rib and a concave groove according to an embodiment of the present disclosure is shown.

[0070] One of the extension part 2 and the transmission part 3 (the transmission part in the example) is configured with a groove 311, and the other (the extension part in the example) is configured with a rib 21, and the groove 311 is clearance-matched with the rib 21 ( Fig.10 ). Therefore, the absorption effect of the cumulative tolerance is achieved through the clearance fit between the groove and the rib, which brings more abundant position design possibilities to the rotating part. From the expression of this technical solution, it can be seen that the objects to which the rib and the groove belong can be designed opposite to the legend, that is, the rib can be constructed in the transmission part, and the groove can be constructed in the extension part. In addition, there is no restriction on the number of ribs and grooves. For example, there are four ribs that together form a cross shape, and the grooves form a cross groove correspondingly. This design can provide a larger gap, that is, it can absorb a larger cumulative tolerance, and can provide a more comprehensive and stable power transmission effect during rotational fit, and it is more cost-effective.

[0071] Combination Figure 4 and Figure 8In some embodiments of the present disclosure, the transmission portion 3 is constructed as a screw, which includes: a connecting portion 31, which is clearance-matched with the extension portion 2; a light rod segment 32, which is connected to the connecting portion 31; a spiral portion 34, which is connected to the light rod segment 32 and is spirally connected to the display portion 4; wherein a flange 33 is arranged between the connecting portion 31 and the light rod segment 32, and the flange 33 extends outward in the radial direction of the screw.

[0072] This technical solution provides a design method for a transmission part or a screw, wherein the spiral part can be provided with an external thread for forming a threaded fit with the internal thread provided in the through hole of the display part or its adjusting movable part. The bare rod section has no external thread and can be used to form a set fit with the transmission part cover or the screw cover to be introduced below, such as a tight fit or a small clearance fit, so as to limit the position of the screw during rotation. The flange can be used to form an overlapping fit with the screw cover to provide support for the screw. Therefore, the transmission part designed by this technical solution can achieve stable power transmission through structural design, and the cumulative tolerance generated is small. Other forms of transmission methods or transmission parts as briefly described above may also be applicable.

[0073] As mentioned above, the grooves and ribs can be assigned to the transmission part and the extension part respectively, and vice versa, and the number of the grooves and ribs is not particularly limited. Figure 4 , Figures 8 to 10 A construction method of grooves and convex ribs is given. Among them, the connecting part 31 is provided with the groove 311, and the extension part 2 is provided with the convex rib 21, which realizes the transmission of rotational motion in a cost-effective manner and can easily eliminate the accumulated tolerance. The design scheme includes the following features of convex ribs and grooves to achieve power transmission: it can effectively transmit torque, the convex ribs can resist shear force, ensure that there is no slippage when transmitting rotational power, and are applicable to occasions of small and large torque transmission; it can realize rapid assembly and disassembly of parts, improve production efficiency, and reduce the alignment and adjustment time during assembly; the design of the convex ribs can increase the structural strength of the extension part, improve the rigidity and stability of the parts, and perform better when bearing loads; when maintenance and replacement of parts are required, they can be easily and quickly disassembled and reinstalled. It can be seen that the cooperation of convex ribs and grooves has multiple advantages in the mechanical design of transmitting rotational motion, and can improve the performance, stability and reliability of the mechanical system.

[0074] from Fig. 9It can also be seen that the convex rib 21 is formed with a matching portion 211 that tapers in a direction away from the rotating portion 1. The matching portion can be used to guide the assembly movement of the extension portion and the transmission portion during the assembly process of the extension portion and the transmission portion, so that the extension portion can be more easily installed in the transmission portion. Correspondingly, the groove can also be constructed with a similar tapered portion (for example, at the bottom of the groove) to facilitate assembly guidance. The matching portion can be formed, for example, simply by chamfering the convex rib.

[0075] For example, the present disclosure also makes a special structural design for the extension part. Fig. 9 The extended portion 2 includes a first portion 22 and a second portion 23 extending in the axial direction of the first portion 22, the radial outer dimension of the second portion 23 is larger than the radial outer dimension of the first portion 22, and a recess 24 is formed at the end of the second portion 23 away from the first portion 22, the recess 24 extends toward the first portion 22 and is at least partially formed in the first portion 22, and the rib 21 is arranged in the recess 24.

[0076] It can be seen that the outer periphery of the first part and the second part of the extension part is equivalent to the flange part of the extension part, which protects the rib located in the extension part. The axial dimension of the flange is, for example, larger than the axial dimension of the rib. In some other embodiments, the end surface of the bracket facing the rotating part is arranged in the direction toward the rotating part to exceed the end surface of the flange of the transmission part facing the rotating part (at Figure 1 It can also be intuitively understood that the upper end face of the bracket is higher than the upper end face of the flange of the transmission part). As will be described later, through this design, the flange or the end face of the second part facing away from the first part can cooperate with the bracket of the smart wearable device during assembly, protect the internal parts, especially the transmission part, the display part, etc. from damage, and will not affect the position of the display part as a precision device. The structural design can also achieve a better shape fit with the upper shell of the smart wearable device and the rotating part. In terms of the assembly of the extension part and the transmission part, this design form of the extension part also supports the transmission part. For example, the connecting part of the screw extends into the recess and cooperates with the convex rib clearance also located in the recess. Thus, while realizing the connection relationship between the two, it also protects the connecting part of the screw. In addition, the rotating part, the extension part, and the transmission part can be constructed as a rotating body, which can better transmit the rotational motion, and can also prompt the user to interact with the rotating part in a rotating manner through the design of this rotating body. In this regard, the rotating part can also be understood as a knob.

[0077] refer to Fig.11 , which shows a structural schematic diagram of a smart wearable device according to an embodiment of the present disclosure.

[0078] The present disclosure also relates to a smart wearable device 1000, including any of the above-mentioned diopter adjustment structures 100. Therefore, the various embodiments of the diopter adjustment structure described herein and the various technical effects that can be achieved are inherited by the smart wearable device. It should also be understood that although this article uses AR (Augmented Reality) smart glasses as an example, other smart wearable devices, such as VR (Virtual Reality) smart glasses, MR (Mixed Reality), XR (Extended Reality), AR, VR smart helmets and other smart wearable devices can all be applied.

[0079] It can also be seen from the figure that the smart wearable device or smart glasses includes temples and frames, and the rotating part configured as a knob is arranged on the frame and extends outward, and at least part of the knob is exposed to the environment so as to interact with the user. The user interacts with the knob to make the display part move along the axial direction of the transmission part, thereby ultimately changing the effect of human eye imaging (size, distance, virtuality and reality), and achieving adaptation for people with different vision. It is also exemplary that the two rotating parts are arranged in the left and right halves of the frame respectively, so that they can be adjusted for a single eye and can adapt to wearers with different degrees of vision in both eyes.

[0080] Regarding the specific structure of smart wearable devices, combined with Fig.12 , which shows a cross-sectional view of a smart wearable device in a diopter adjustment structure area according to an embodiment of the present disclosure.

[0081] The smart wearable device 1000 also includes: a first part and a second part, the rotating part 1 and the extension part 2 are arranged in the first part, the transmission part 3 and the display part 4 are arranged in the second part, and the diopter adjustment structure 100 also includes an elastomer 6, and the elastomer 6 is arranged between the first part and the rotating part 1.

[0082] The elastomer designed by the technical solution can be constructed as a cushion, for example, and the specific material is not limited, for example, rubber, polyurethane or foam can be selected. In addition, the cushion can also be constructed as a combined laminate or composite layer, wherein the composite layer includes an elastic material layer, such as the rubber, polyurethane or foam layer mentioned above, and a lubricating layer, such as a Teflon sheet. In this case, the relative position relationship of the specific structure of the composite layer used by the cushion can be selected according to the mounting situation. For example, when arranging the cushion, if the cushion is arranged on the first part and the rotating part is arranged on the cushion, the lubricating layer is connected to the rotating part; if the rotating part is connected to the cushion first, and then the small component is arranged on the first part, the lubricating layer is connected to the first part. In this way, lubrication can be carried out in a targeted manner according to different mounting situations. The characteristics of Teflon include high temperature resistance, stable chemical properties, and the ability to maintain good lubrication performance. Rubber includes many categories such as natural rubber and nitrile rubber. Suitable elastomer materials can be selected according to specific use environments and performance requirements. Here, the elastomer can be configured into a circular ring shape so as to better match the shape of the rotating part or the extension part. As will be described later, the elastomer can be used in the assembly process of the rotating part, and the elastic action of the elastomer is used to squeeze the rotating part and the extension part outward, so that a clearance fit is formed between the extension part and the transmission part, and the rotating part and the transmission part are separated as far as possible without restriction, and the technical effect expected by the clearance fit is achieved. Of course, it should be understood that the elasticity or thickness of the elastomer should be determined according to the actual assembly situation, so that although the extension part and the transmission part realize the clearance fit through the elastomer, the extension part and the transmission part cannot be completely separated, so as not to cause the situation that the rotational motion cannot be transmitted during work. Another way to achieve the control of clearance fit will be introduced later. In addition, for the same reason of tolerance control, it can be considered to use a small clearance fit between the extension part and the first part, which is conducive to tolerance control, so that the position of the extension part is better, or the position and size design of the extension part have a larger space, which can also be conducive to the cumulative tolerance control of the rotating part.

[0083] The specific references to the first part and the second part can be determined according to the actual structure of the smart wearable device. Taking smart glasses as an example, the first part includes an upper shell 1001 (sometimes also called a glasses frame), and the second part includes a lower shell 1002 (sometimes called a base), a bracket 1003 fixedly connected to the lower shell 1002, and a transmission part cover 1004 fixed to the lower shell 1002 and arranged between the bracket 1003 and the transmission part 3. In the case of this application scenario, the peripheral gap between the rotating part and the peripheral parts mentioned in the present disclosure may refer to the gap between the outer surface of the rotating part and the inner surface of the glasses frame. Figure 1 and Figure 3 Indicated by the symbol G.

[0084] Among them, the upper shell and the lower shell form a part of the frame of the smart glasses. According to the assembly relationship, the upper shell, the elastomer, the rotating part and the extension part can be regarded as one component, and the lower shell, the bracket, the cover body, the transmission part and the display part are another component, and these two components are clearance-matched. And as explained above, the transmission part, such as the light rod section of the screw and the transmission part cover body (which may be referred to as the screw cover here) are tightly fitted or have a small clearance fit, and the flange of the screw is supported by the end face of the screw cover facing the knob, and the display part can be arranged in the accommodation space formed by the lower shell and the screw cover. In the case where the smart wearable device is also constructed with a guide column, the guide column can be constructed on the lower shell and extend upward from the lower shell along the axial direction of the transmission part. In addition, as explained above, the extension portion 2 includes a first portion 22 and a second portion 23 extending in the axial direction of the first portion 22, the radial outer dimension of the second portion 23 is larger than the radial outer dimension of the first portion 22, and the end surface of the second portion 23 facing away from the first portion 22 can abut against the bracket 1003 to protect the internal component from damage or to avoid affecting the position of the internal component.

[0085] from Fig.12 It can also be seen that the second part 23 is formed with an outwardly extending overlap portion 231, and the overlap portion 231 is engaged with the first part. For this reason, the first part, such as the upper shell, is also similarly constructed with an overlap portion 10011, which is engaged or overlapped with the overlap portion. In this way, the limit position of the clearance fit between the extension part and the transmission part can be limited, that is, in the process of the elastic body squeezing the rotating part and the extension part outward or upward, the overlap portion of the extension part can form abutment with the overlap portion of the upper shell, thereby limiting the further upward movement of the extension part, and also limiting the limit gap position between the extension part and the transmission part, so that although there is a clearance fit between the two, they will not be completely separated and cannot transmit the rotational motion during work, that is, the two are separated as much as possible without restriction. It can be seen that the flange of the extension part or the second part has multiple functions, including the limitation of the limit gap position and the protection of the internal parts, as well as the assembly position limitation during the subsequent step S1 to be introduced.

[0086] refer to Figures 13 to 16 ,in, Fig.13 A flow chart of an assembly method according to an embodiment of the present disclosure is shown; Fig.14 A cross-sectional view corresponding to step S1 of an assembly method according to an embodiment of the present disclosure is shown; Fig.15 A cross-sectional view corresponding to step S2 of an assembly method according to an embodiment of the present disclosure is shown; and Fig.16 A cross-sectional view corresponding to step S4 of an assembly method according to an embodiment of the present disclosure is shown.

[0087] An assembly method of the smart wearable device 1000, wherein the assembly method comprises the following steps: Step S1: inserting the extension portion 2 into the first portion ( Fig.14 ). For example, it is possible to consider inverting the smart wearable device or the first part thereof so that the extension part can be installed into the first part from top to bottom. This technical solution is convenient for the assembly of the subsequent step S2 to prevent the components in step S2 from falling during the assembly process. Here, the overlapping part of the extension part forms an overlapping fit with the overlapping fitting part of the first part to indicate that the two are assembled.

[0088] Step S2: Install the transmission part 3 together with the second part into the first part from top to bottom ( Fig.15 ). As explained before, the transmission part, the transmission part cover, the bracket, the lower shell, and the display part can be regarded as another component. This step is the process of installing the other component into the first part in an integral manner (that is, the other component has been assembled in advance). It should be understood that during the assembly process, the groove of the transmission part can be aligned with the rib of the extension part, and the second part (flange) of the extension part can be aligned with the bracket to complete the assembly and protect the internal parts (especially the transmission part and the display part).

[0089] Step S3: Arrange the elastic body 6 on the first part and sleeve it on the extension part 2. Step S4: Fixedly sleeve the rotating part 1 on the extension part 2 and arrange it on the elastic body 6, so that the elastic body 6 is compressed ( Fig.16 ). The technical effect of the elastomer has been explained in the previous text. It should be emphasized that in the process of the elastomer being compressed, the extension part will move in the direction of the transmission part, and there may be a risk of hitting the transmission part, thereby damaging the transmission part or interfering with the position of the transmission part, and may also indirectly interfere with the display part connected to the transmission part. To this end, the present disclosure is designed to enable the second part of the extension part to abut against the end face of the bracket before the aforementioned event occurs, thereby avoiding these risks. In addition, if the fixed connection between the rotating part and the extension part is achieved by gluing, then before the fixed connection here, glue or back glue can be applied to the inside of the rotating part and / or the surface of the extension part, and then assembled to the extension part, and glue fixation is achieved by pressing the rotating part (while the elastomer is compressed). For example, before arranging the elastomer, if it has been inverted before, it can be placed upright here to facilitate the subsequent arrangement of the elastomer and the rotating part.

[0090] Step S5: The elastomer 6 squeezes the rotating part 1 together with the extension part 2 outward (using the natural elastic force of the elastomer to squeeze the rotating part and the extension part upward), so that the extension part 2 and the transmission part 3 are clearance-matched. This step can be performed after the previous glue coating is cured. During the implementation of this step, as explained above, the overlapping part of the extension part and the overlapping matching part of the upper shell will form an abutment, thereby limiting the limit position of the clearance fit, ensuring that the extension part and the transmission part can still transmit the rotational motion during the working process, and at the same time ensuring the expected technical effect of the clearance fit. At the same time, the extension part and the bracket will also be separated, ensuring that the rotational motion of the extension part can be smoothly transmitted to the transmission part.

[0091] It should be understood that all of the above preferred embodiments are illustrative rather than restrictive, and that various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present disclosure should be within the legal protection scope of the present disclosure.

Claims

1. A diopter adjustment structure, characterized in that: include: Rotating part; An extension portion, fixedly connected to one side of the rotating portion; A transmission part, wherein the transmission part and the extension part are in clearance fit, and the transmission part is driven by the rotating part to rotate; as well as The display part is transmission-connected to the transmission part, so that the display part moves along the axial direction of the transmission part under the drive of the rotation of the transmission part; wherein One of the extension part and the transmission part is configured with a groove, and the other is configured with a convex rib, the groove and the convex rib are clearance-matched, and the transmission part is configured as a screw.

2. The diopter adjustment structure according to claim 1, characterized in that: The extension portion and the transmission portion are clearance-fitted in the axial direction of the transmission portion and in the radial direction of the transmission portion.

3. The diopter adjustment structure according to claim 1, characterized in that: The rotating portion is adhesively connected to the extending portion.

4. The diopter adjustment structure according to claim 1, characterized in that: The display unit includes an adjustable movable part, a display screen arranged on the adjustable movable part, and a lens for transmitting image light emitted from the display screen. The adjustable movable part is in transmission connection with the transmission unit, and the display screen and the lens move together under the drive of the adjustable movable part.

5. The diopter adjustment structure according to claim 4, characterized in that: The diopter adjustment structure further includes a guide post, and the guide post passes through the adjustment movable part.

6. The diopter adjustment structure according to claim 1, characterized in that: The screw comprises: A connecting portion, which is clearance-matched with the extension portion; A bare rod section connected to the connecting portion; A spiral portion connected to the light rod segment and connected to the display portion in a spiral transmission manner; Wherein, a flange is arranged between the connecting portion and the polished rod segment, and the flange extends outward in the radial direction of the screw rod.

7. The diopter adjustment structure according to claim 6, characterized in that: The connecting portion is provided with the groove, and the extending portion is provided with the convex rib.

8. The diopter adjustment structure according to claim 7, characterized in that: The rib is formed with a fitting portion that becomes thinner in a direction away from the rotating portion.

9. The diopter adjustment structure according to claim 1, characterized in that: The extended portion includes a first portion and a second portion extending in the axial direction of the first portion, the radial outer dimension of the second portion is larger than the radial outer dimension of the first portion, and a recess is formed at the end of the second portion away from the first portion, the recess extends toward the first portion and is at least partially formed in the first portion, and the convex rib is arranged in the recess.

10. A smart wearable device, characterized in that: The smart wearable device comprises a diopter adjustment structure according to any one of claims 1 to 8.

11. The smart wearable device according to claim 10, characterized in that: The smart wearable device also includes: A first part and a second part, the rotating part and the extending part are arranged in the first part, the transmission part and the display part are arranged in the second part, and the diopter adjustment structure also includes an elastomer, and the elastomer is arranged between the first part and the rotating part.

12. The smart wearable device according to claim 11, characterized in that: The first part includes an upper shell, and the second part includes a lower shell, a bracket fixedly connected to the lower shell, and a transmission part cover fixed to the lower shell and arranged between the bracket and the transmission part.

13. The smart wearable device according to claim 12, characterized in that: The extension portion includes a first portion and a second portion extending in the axial direction of the first portion. The radial outer dimension of the second portion is larger than that of the first portion. The end surface of the second portion facing away from the first portion can abut against the bracket.

14. The smart wearable device according to claim 13, characterized in that: The second portion is formed with an outwardly extending overlapping portion, and the overlapping portion is snap-fitted with the first portion.

Images