Optical module and intelligent head-mounted device

Abstract

The embodiment of the invention provides an optical module and intelligent head-mounted equipment. The optical module comprises a bearing assembly, at least one lens, a screen, a motor, at least two threaded guide rods and a synchronizing mechanism, the bearing assembly comprises a lens cone and a screen support arranged at one end of the lens cone. The lens is arranged in the lens cone; the screen is arranged on the screen bracket, and the screen and the lens are arranged along the same optical axis; the motor is provided with a motor guide rod, and the motor guide rod and the threaded guide rods penetrate through the lens cone and are in transmission connection with the screen support. The synchronizing mechanism comprises a synchronous belt and at least three synchronous belt wheels, the at least three synchronous belt wheels are respectively connected with the motor guide rod and the at least two threaded guide rods, and the synchronous belt is wound on the at least three synchronous belt wheels; and the screen bracket is configured to be capable of driving the screen to do linear movement along the threaded guide rod and the motor guide rod under the driving of the motor.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical display technology. More specifically, the embodiments of the present application relate to an optical module and an intelligent head-mounted device. Background Art

[0002] With the rapid development of VR technology, users have put forward higher requirements for the imaging quality and user experience of VR devices. In traditional VR devices (such as VR glasses), the distance between the screen and the lens module is fixed, resulting in the optical module having a fixed virtual image distance (VID) when imaging, which limits the software application scenarios and user experience. Although there are related concepts and some research on the AFD (Adaptive Focus Display) adjustment of the optical module, it is very difficult to achieve stable and accurate adjustment of the distance between the screen and the lens module. Summary of the invention

[0003] The purpose of this application is to provide a new technical solution for optical modules and smart head-mounted devices.

[0004] In a first aspect, an embodiment of the present application provides an optical module, the optical module comprising:

[0005] A bearing assembly, comprising a lens barrel and a screen support arranged at one end of the lens barrel;

[0006] At least one lens, disposed in the lens barrel;

[0007] A screen, arranged on the screen bracket and arranged along the same optical axis as the lens;

[0008] A motor and at least two threaded guide rods, wherein the motor has a motor guide rod, and the motor guide rod and each of the threaded guide rods are all passed through the lens barrel and are drivingly connected to the screen bracket;

[0009] A synchronous mechanism, comprising a synchronous belt and at least three synchronous pulleys, wherein the at least three synchronous pulleys are respectively connected to the motor guide rod and the at least two threaded guide rods, and the synchronous belt is wound around the at least three synchronous pulleys;

[0010] The screen bracket is configured to be able to move linearly along the threaded guide rod and the motor guide rod with the screen under the drive of the motor.

[0011] Optionally, at least three mounting holes are provided on the edge of the screen bracket extending outward, and an insert nut is embedded in each mounting hole;

[0012] The at least two threaded guide rods and the motor guide rod are threadably matched with at least three insert nuts respectively.

[0013] Optionally, the motor guide rod and each of the threaded guide rods are respectively provided with a threaded section that cooperates with the insert nut.

[0014] Optionally, the synchronous pulleys are arranged in one-to-one correspondence with the at least two threaded guide rods and the motor guide rod.

[0015] Optionally, the optical module further comprises a bellows, and the bellows is retractable;

[0016] The bellows is arranged between the lens barrel and the screen bracket, one end of the bellows is connected to the lens barrel, and the other end is connected to the screen bracket.

[0017] Optionally, one end of the threaded guide rod is connected to the lens barrel and a screw cap is provided on the end cover, wherein the screw cap is used to limit the degree of freedom of the threaded guide rod so that it can only rotate in the axial direction.

[0018] Optionally, the lens is a cut-edge lens.

[0019] Optionally, the optical module further comprises a control module, and the control module is capable of outputting a control signal;

[0020] When the motor receives the control signal, it drives the motor guide rod to rotate. The rotation of the motor guide rod transmits power through the synchronous belt and the synchronous pulley, thereby driving the at least two threaded guide rods to rotate synchronously. As the threaded guide rods rotate, the screen bracket can move the screen in a straight line along the optical axis.

[0021] Optionally, a mounting portion is provided on one side of the screen bracket, the screen is fixed to the mounting portion by glue, and the screen is located on a side of the screen bracket away from the lens barrel.

[0022] Optionally, the outer surface of the side wall of the lens barrel is provided with a first assembly portion and at least two second assembly portions;

[0023] The motor guide rod is inserted into the first assembly portion;

[0024] The threaded guide rod is inserted into the second assembly portion.

[0025] In a second aspect, an embodiment of the present application provides a smart head-mounted device. The smart head-mounted device includes:

[0026] casing; and

[0027] As in the optical module of the first aspect, the optical module is disposed in the housing.

[0028] The beneficial effects of this application are:

[0029] The optical module provided in the embodiment of the present application realizes stable linear movement of the screen during the AFD adjustment process through a specially designed adjustment mechanism, which ensures that the distance between the screen and the lens can be precisely controlled, meeting the requirements for virtual image distance in different application scenarios; in the present application, at least two threaded guide rods are used in combination with a motor guide rod to drive the screen to move along the optical axis relative to the lens. This movement method is stable and will not tilt or shake, which effectively avoids the poor MTF problem caused by the deterioration of the parallel relationship between the screen and the lens, thereby ensuring the clarity and quality of the imaging picture.

[0030] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0032] Figure 1 It is a schematic diagram of the structural decomposition of the optical module of an embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the external structure of an optical module according to an embodiment of the present application;

[0034] Figure 3 is a cross-sectional view of an optical module according to an embodiment of the present application;

[0035] Figure 4 This is a schematic structural diagram of an insert nut of an optical module according to an embodiment of the present application;

[0036] Figure 5 for Figure 4 The cross-sectional view along the AA direction;

[0037] Figure 6 A structural diagram of a screen bracket of an optical module according to an embodiment of the present application from one viewing angle;

[0038] Figure 7 A structural diagram of a screen bracket of an optical module according to an embodiment of the present application from another perspective;

[0039] Figure 8 A schematic diagram of the structure of a screw cover of an optical module according to an embodiment of the present application;

[0040] Fig. 9 for Figure 8 The cross-sectional view along the AA direction;

[0041] Fig.10 A schematic diagram of the structure of a bellows of an optical module according to an embodiment of the present application;

[0042] Fig.11 for Fig.10 The enlarged schematic diagram of point B in the middle;

[0043] Fig.12 This is an assembly flow chart of the threaded guide rod in the embodiment of the present application.

[0044] Description of reference numerals:

[0045] 1. Motor; 101. Motor guide rod; 2. Lens barrel; 201. First assembly part; 202. Second assembly part; 3. Bellows; 4. Insert nut; 5. Screen; 6. Synchronous belt; 7. Synchronous pulley; 8. Glue; 9. Screen bracket; 901. Mounting hole; 902. Mounting part; 10. Lens; 11. Threaded guide rod; 12. Screw cover. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0049] 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.

[0050] 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.

[0051] The optical module and the smart head-mounted device provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0052] According to one aspect of the embodiments of the present application, an optical module is provided. Figures 1 to 3The optical module includes a bearing assembly, at least one lens 10, a screen 5, a motor 1 and at least two threaded guide rods 11 and a synchronization mechanism; the bearing assembly includes a lens barrel 2 and a screen bracket 9 arranged at one end of the lens barrel 2; the lens 10 is arranged in the lens barrel 2; the screen 5 is arranged on the screen bracket 9 and is arranged along the same optical axis with the lens 10; the motor 1 has a motor guide rod 101, the motor guide rod 101 and each of the threaded guide rods 11 are all penetrated through the lens barrel 2 and are transmission-connected to the screen bracket 9; the synchronization mechanism includes a synchronous belt 6 and at least three synchronous pulleys 7, the at least three synchronous pulleys 7 are respectively connected to the motor guide rod 101 and the at least two threaded guide rods 11, and the synchronous belt 6 is wound around the at least three synchronous pulleys 7; the screen bracket 9 is configured to be able to move the screen 5 linearly along the threaded guide rod 11 and the motor guide rod 101 under the drive of the motor 1.

[0053] The optical module provided in the embodiments of the present application is, for example, a VR optical module.

[0054] The optical module provided in the embodiment of the present application realizes that during the AFD (Adaptive Focus Display) adjustment process, the screen 5 can stably move along the optical axis relative to the lens 10 through a series of carefully designed optical components and mechanisms.

[0055] The optical module provided in the embodiment of the present application mainly includes the following key optical components, which work together to realize the AFD (adaptive focus screen) adjustment function. The following is a description of the main components.

[0056] The bearing assembly includes two parts: a lens barrel 2 and a screen bracket 9 .

[0057] The lens barrel 2 is used to accommodate and protect the lens 10 and other key optical components.

[0058] The screen bracket 9 is disposed at one end of the lens barrel 2 for fixing and supporting the screen 5. In the present application, the design of the screen bracket 9 takes into account the cooperation with the threaded guide rod 11 and the motor guide rod 101 of the motor 1 to ensure that the screen 5 can move smoothly.

[0059] The lens 10 is arranged in the lens barrel 2 and is one of the core components of the entire optical module. The lens 10 is mainly responsible for receiving and refracting light to form an image. The optical module of the present application may include one or more lenses 10, which can be flexibly combined into a lens module according to actual needs.

[0060] It should be noted that the internal structure of the lens barrel 2 is flexibly designed to accommodate the layout of one or more lenses 10, which are combined to form a lens module. This design not only enhances the optical performance of the optical module, but also allows the configuration of the lens module to be flexibly adjusted according to actual needs to meet the imaging requirements and user visual experience in different scenarios.

[0061] The screen 5 is arranged on the screen support 9 and is arranged along the same optical axis as the lenses 10 arranged in the lens barrel 2. The screen 5 is kept parallel to the lenses 10. The screen 5 is used to provide light for imaging display.

[0062] During the AFD adjustment process of the present application, the screen 5 can move linearly in a specific direction under the drive of the motor 1 to change the distance between the screen 5 and the lens 10 (or the entire lens module), thereby achieving adaptive focusing.

[0063] The motor 1 is used as a power source and is responsible for providing driving force to drive the screen support 9 to move the screen 5 along the optical axis to move closer to or away from the lens 10. Figure 1 The motor guide rod 101 is both a connection between the motor 1 and the screen bracket 9 and a transmission component between the two, and transmits the power of the motor 1 to the screen bracket 9 through, for example, threaded fitting.

[0064] The present application also introduces a threaded guide rod 11, and the threaded guide rod 11 is designed to be provided with at least two. The at least two threaded guide rods 11 are inserted into the lens barrel 2 together with the motor guide rod 101. The at least two threaded guide rods 11 also form a threaded transmission matching relationship with the screen bracket 9, realizing the conversion of the rotational motion of the motor 1 into the linear motion of the screen bracket 9. This design ensures the stability and accuracy of the screen 5 during the movement process.

[0065] The synchronization mechanism includes a synchronous belt 6 and at least three synchronous pulleys 7, wherein one synchronous pulley 7 is connected to the motor guide rod 101, and the other two synchronous pulleys 7 are respectively connected to two threaded guide rods 11. When the motor 1 rotates, the motor guide rod 101 drives the synchronous pulley 7 connected thereto to rotate, and the synchronous belt 6 drives the other two synchronous pulleys 7 to rotate, thereby transmitting power to all the threaded guide rods 11 to achieve their synchronous rotation. This synchronous transmission mechanism ensures the stability of the screen 5 during movement and realizes precise adjustment of the AFD.

[0066] In the present application, the design of the synchronization mechanism enables the screen bracket 9 and the screen 5 to remain relatively stable during the movement. Through the close fit of the synchronization belt 6 and the precise positioning of the synchronization pulley 7, the jitter and deviation during the movement are reduced, ensuring that the parallel relationship between the screen 5 and the lens 10 is not affected. This stability is of great significance for ensuring imaging quality and avoiding poor MTF problems.

[0067] The optical module provided by the embodiment of the present application has the following beneficial effects:

[0068] (1) The screen 5 can move stably in a straight line along the optical axis relative to the lens 10;

[0069] Driven by the motor 1, the motor guide rod 101 and the at least two threaded guide rods 11 can rotate synchronously and at the same speed. This synchronous rotation is achieved through a synchronization mechanism (including a synchronous belt 6 and at least three synchronous pulleys 7), ensuring that the screen bracket 9 and the screen 5 can move accurately and stably in a straight line along the threaded guide rod 11 (or along the optical axis). This straight line movement is not only highly accurate, but also has good stability, avoiding tilting or shaking of the screen during the adjustment process, thereby ensuring the parallel relationship between the screen 5 and the lens 10.

[0070] (2) AFD real-time adjustment function: Since the screen 5 can move in real time under the drive of the motor 1, the VID (virtual image distance) can be adjusted in real time. This real-time adjustment function enables the optical module of the present application to adapt to different software application scenarios and provide a richer and more realistic virtual experience.

[0071] (3) Ability to ensure imaging quality: By ensuring the stability of the screen 5 during movement and its parallelism with the lens, the optical module of the present application avoids the problem of poor MTF (modulation transfer function). It should be noted that MTF is an important indicator for measuring the quality of optical imaging, which reflects the decrease in contrast of light of different frequencies after passing through the optical system. Since the parallel relationship between the screen and the lens is effectively maintained, the clarity and quality of the image are significantly improved.

[0072] In some examples of this application, see Figure 6 and Figure 7 The edge of the screen bracket 9 extends outward to form at least three mounting holes 901, and each mounting hole 901 is embedded with an insert nut 4; the at least two threaded guide rods 11 and the motor guide rod 101 are threadedly matched with the at least three insert nuts 4 respectively.

[0073] According to this example of the present application, see Figure 6 and Figure 7 At least three mounting holes 901 are provided extending outward from the edge of the screen bracket 9, and an insert nut 4 is embedded in each mounting hole 901. This design enables at least two threaded guide rods 11 and a motor guide rod 101 to form threaded cooperation with these insert nuts 4.

[0074] The connection strength between the screen bracket 9 and the guide rods is enhanced by inserting the insert nut 4 in the mounting hole 901 and forming a threaded fit with the threaded guide rod 11 and the motor guide rod 101. This connection method ensures the stability of the screen 5 during movement and avoids shaking or deviation of the screen 5.

[0075] The insert nut 4 can be directly embedded into the mounting hole 901 of the screen bracket 9 during the injection molding process. This one-piece molding design simplifies the subsequent assembly process.

[0076] The threaded matching method ensures efficient transmission between each guide rod (including the motor guide rod 101 and the threaded guide rod 11) and the insert nut 4. When the motor 1 drives each guide rod to rotate, the threaded matching can quickly and stably transmit power to the screen bracket 9 and the screen 5, thereby achieving fast and accurate linear movement.

[0077] In some examples of this application, see Figure 1 The motor guide rod 101 and each of the threaded guide rods 11 are respectively provided with a threaded section that cooperates with the insert nut 4.

[0078] See also Figure 4 and Figure 5 A thread structure is formed on the wall surface of the inner cavity of the insert nut 4.

[0079] Each guide rod (including the motor guide rod 101 and the threaded guide rod 11) cooperates with the threaded structure in the insert nut 4 through the threaded section, and the motor guide rod 101 and the threaded guide rod 11 can drive the screen bracket 9 to carry the screen 5 to perform stable linear motion along the axial direction when rotating. This transmission method effectively reduces the motion deviation caused by inaccurate transmission and improves the accuracy and stability of AFD adjustment.

[0080] The threaded fitting design enables the power output by the motor 1 to be efficiently transmitted to the screen bracket 9 and the screen 5, thereby reducing energy loss during the transmission process.

[0081] The threaded fitting is self-locking, and the threaded connector can maintain a relative position unchanged in the absence of external force. This stability ensures that the screen 5 can be stably maintained at the specified position after being adjusted to the specified position, avoiding VID changes caused by vibration or external force interference, thereby ensuring the stability of imaging quality.

[0082] In some examples of this application, see Figures 1 to 3 The synchronous pulley 7 is respectively arranged in one-to-one correspondence with the at least two threaded guide rods 11 and the motor guide rod 101.

[0083] The one-to-one correspondence of the synchronous pulleys 7 ensures that the motor guide rods 101 and the threaded guide rods 11 can rotate synchronously and at the same speed. This synchronization is crucial for controlling the movement of the screen bracket 9 with the screen 5 in the optical module. It ensures that during the AFD adjustment process, the screen 5 can move stably and smoothly, avoiding jitter or offset caused by asynchrony.

[0084] Since all relevant guide rods are connected to the synchronous belt 6 through the synchronous pulley 7, a stable transmission system is formed. This design enhances the stability and reliability of the entire optical module. Even in the case of external interference or load changes, a stable transmission relationship can be maintained, thereby ensuring imaging quality and user experience.

[0085] In some examples of this application, see Fig.10 and Fig.11 The optical module also includes a bellows 3, which is retractable; the bellows 3 is arranged between the lens barrel 2 and the screen bracket 9, one end of the bellows 3 is connected to the lens barrel 2, and the other end is connected to the screen bracket 9.

[0086] The bellows 3 is arranged between the lens barrel 2 and the screen bracket 9, and uses its elasticity to connect the two, effectively realizing the sealing of the internal structure of the optical module. This sealing design can prevent external pollutants such as dust and water vapor from entering the interior of the optical module, thereby protecting key components such as the lens module and the screen from damage and extending the service life of the optical module.

[0087] Since the screen bracket 9 needs to perform axial linear motion relative to the lens barrel 2 to achieve AFD adjustment, the traditional fixed connection method cannot meet this requirement. The elasticity of the bellows 3 solves this problem, allowing the screen bracket 9 to maintain connection with the lens barrel 2 during movement without being hindered or generating excessive friction. This design ensures the smoothness and accuracy of AFD adjustment.

[0088] The bellows 3 in the embodiment of the present application is made of rubber, for example.

[0089] In one example, see Fig.10 and Fig.11 The bellows 3 is composed of a plurality of tightly curled rubber rings, which is the key to the bellows' flexible expansion and contraction.

[0090] In some examples of this application, see Figure 1 and Fig.12 One end of the threaded guide rod 11 is connected to the lens barrel 2 and a screw cover 12 is provided on the end cover. The screw cover 12 is used to limit the freedom of the threaded guide rod 11 so that it can only rotate along the axial direction.

[0091] In this example of the present application, the threaded guide rod 11 is connected to the lens barrel 2, and a screw cap 12 is provided at its connection end. The design of the screw cap 12 effectively limits the freedom of the threaded guide rod 11, ensuring that it can only rotate along the axial direction. By limiting the non-axial rotational movement of the threaded guide rod 11, unnecessary vibration and deviation are avoided, and the stability of the screen bracket 9 during the movement is ensured, thereby ensuring that the screen 5 and the lens 10 always remain in a parallel state.

[0092] See also Fig.12 When assembling the threaded guide rod 11 , the threaded guide rod 11 is installed into a set position of the side wall of the lens barrel 2 , and then the screw cap 12 is installed on the top end of the threaded guide rod 11 .

[0093] See also Figure 8 and Fig. 9 The screw cover 12 is provided with a cavity inside to accommodate one end of the threaded guide rod 11. At the same time, the outer wall of the screw cover 12 is provided with a threaded structure to form a threaded fit with the second assembly part 202 on the lens barrel 2 (the second assembly part 202 will be described in detail later).

[0094] The lens 10 in the present application may be, for example, a trimmed lens, that is, the edge of the lens 10 is a straight edge. The trimmed lens exhibits significant advantages in lens alignment during assembly. For example, the precise size and shape of the trimmed lens make it easier for assemblers to ensure alignment accuracy through visual inspection or the use of auxiliary tools, thereby improving assembly accuracy and product quality.

[0095] One reason for using trimmed lenses in optical modules is that the lenses need to be enlarged to increase the FOV (field of view). However, when the lenses are enlarged, they will interfere with the bridge of the nose, so the bridge of the nose needs to be trimmed. The trimmed lenses can match the bridge of the nose and brow bone of different shapes due to the precise cutting of their edges. The trimmed lenses can reduce the pressure of the lenses on the bridge of the nose and improve the wearing comfort.

[0096] Of course, the lens 10 may not be edge trimmed, and this is not specifically limited in the present application.

[0097] In some examples of the present application, the optical module also includes a control module, which can output a control signal; when the motor 1 receives the control signal, it drives the motor guide rod 101 to rotate, and the rotation of the motor guide rod 101 transmits power through the synchronous belt 6 and the synchronous pulley 7, thereby driving the at least two threaded guide rods 11 to rotate synchronously. As the threaded guide rod 11 rotates, the screen bracket 9 can move the screen 5 in a straight line along the optical axis.

[0098] In this example of the present application, a control module is also integrated in the optical module, which can output a control signal to realize intelligent management of the optical module. For example, when the control signal is received by the motor 1, the motor 1 will respond quickly and drive the motor guide rod 101 to rotate. This action marks the start of the power transmission process. The core of power transmission lies in the efficient cooperation of the synchronous belt 6 and the synchronous pulley 7, which together constitute a stable and efficient transmission system. This transmission system not only ensures the accuracy and continuity of power transmission, but also significantly reduces energy loss and improves overall efficiency.

[0099] As the motor guide rod 101 rotates, all the threaded guide rods 11 rotate synchronously under the drive of the synchronization mechanism. This design ensures the stability of the screen bracket 9 during movement and avoids deviation or vibration caused by asynchronism. The rotational motion of the threaded guide rod 11 is cleverly converted into the linear motion of the screen bracket 9, so that the screen 5 can move smoothly and accurately along the optical axis.

[0100] In summary, the optical module of the present application realizes accurate, stable and flexible adjustment of the position of the screen 5 by integrating a control module, adopting an efficient transmission system and a precise mechanical structure design, demonstrating excellent technical effects and broad application prospects.

[0101] In some examples of this application, see Figure 1A mounting portion 902 is provided on one side of the screen bracket 9 , the screen 5 is fixed to the mounting portion 902 by glue 8 , and the screen 5 is located on a side of the screen bracket 9 away from the lens barrel 2 .

[0102] In this example of the present application, the screen bracket 9 is provided with a mounting portion 902, which is specially provided for fixing the screen 5. The screen 5 is firmly attached to the mounting portion 902 by, for example, PSA glue (pressure sensitive adhesive), and this connection method realizes the stable installation of the screen 5 on the screen bracket 9.

[0103] The glue 8 is, for example, PSA glue. With its excellent adhesion and durability, PSA glue ensures that the screen 5 is firmly fixed on the mounting portion 902, effectively reduces the shaking and displacement of the screen 5 during use, and improves the stability of the optical module.

[0104] The application of PSA glue simplifies the installation process, eliminating the need for complicated installation steps and additional tools, and improves assembly efficiency. At the same time, this connection method also facilitates subsequent screen maintenance and replacement, reducing maintenance costs.

[0105] In some examples of this application, see Figure 1 and Figure 2 The outer surface of the side wall of the lens barrel 2 is provided with a first assembly portion 201 and at least two second assembly portions 202 ; the motor guide rod 101 is inserted into the first assembly portion 201 ; and the threaded guide rod 11 is inserted into the second assembly portion 202 .

[0106] In this example of the present application, a first assembly portion 201 and at least two second assembly portions 202 are designed on the outer surface of the side wall of the lens barrel 2, and the motor guide rod 101 is firmly inserted in the first assembly portion 201, ensuring the stability and reliability of power transmission; and the threaded guide rod 11 is inserted in the second assembly portion 202, thereby achieving a close combination with the lens barrel 2 and ensuring the accuracy of power transmission, so that the screen bracket 9 can drive the screen 5 to move precisely in a straight line along the optical axis.

[0107] According to another embodiment of the present application, a smart head-mounted device is provided, wherein the smart head-mounted device comprises a housing and the optical module as described above, wherein the optical module is disposed in the housing.

[0108] The smart head-mounted device provided in the embodiment of the present application is, for example, a VR smart head-mounted device, such as VR smart glasses or a VR smart helmet.

[0109] The smart head-mounted device proposed in the embodiment of the present application not only improves the product performance and user experience, but also broadens the application scenarios by integrating a VR optical module that can accurately implement AFD adjustment.

[0110] The optical modules may be provided in two, one of which corresponds to the left eye of the user, and the other corresponds to the right eye of the user.

[0111] The specific implementation of the intelligent head mounted device of the embodiment of the present application can refer to the various embodiments of the above-mentioned optical module, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0112] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0113] 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. An optical module, characterized in that: include: A bearing assembly, comprising a lens barrel (2) and a screen support (9) arranged at one end of the lens barrel (2); At least one lens (10) is arranged in the lens barrel (2); A screen (5) is arranged on the screen bracket (9) and is arranged along the same optical axis as the lens (10); A motor (1) and at least two threaded guide rods (11), wherein the motor (1) has a motor guide rod (101), and the motor guide rod (101) and each of the threaded guide rods (11) are both inserted into the lens barrel (2) and are drivingly connected to the screen bracket (9); A synchronous mechanism, comprising a synchronous belt (6) and at least three synchronous pulleys (7), wherein the at least three synchronous pulleys (7) are respectively connected to the motor guide rod (101) and the at least two threaded guide rods (11), and the synchronous belt (6) is wound around the at least three synchronous pulleys (7); The screen bracket (9) is configured to be able to move linearly along the threaded guide rod (11) and the motor guide rod (101) with the screen (5) under the drive of the motor (1).

2. The optical module according to claim 1, characterized in that: The edge of the screen bracket (9) is extended outward to be provided with at least three mounting holes (901), and each mounting hole (901) is embedded with an insert nut (4); The at least two threaded guide rods (11) and the motor guide rod (101) are threadably matched with at least three insert nuts (4).

3. The optical module according to claim 2, characterized in that: The motor guide rod (101) and each of the threaded guide rods (11) are respectively provided with a threaded section that cooperates with the insert nut (4).

4. The optical module according to claim 2, characterized in that: The synchronous pulley (7) is respectively arranged in one-to-one correspondence with the at least two threaded guide rods (11) and the motor guide rod (101).

5. The optical module according to claim 1, characterized in that: The optical module also includes a bellows (3), and the bellows (3) is retractable; The bellows (3) is arranged between the lens barrel (2) and the screen bracket (9); one end of the bellows (3) is connected to the lens barrel (2), and the other end is connected to the screen bracket (9).

6. The optical module according to claim 1, characterized in that: One end of the threaded guide rod (11) is connected to the lens barrel (2) and a screw cover (12) is provided on the end cover. The screw cover (12) is used to limit the degree of freedom of the threaded guide rod (11) so that it can only rotate along the axial direction.

7. The optical module according to claim 1, characterized in that: The lens (10) is an edge-cut lens.

8. The optical module according to any one of claims 1 to 7, characterized in that: The optical module further includes a control module, and the control module is capable of outputting a control signal; When the motor (1) receives the control signal, it drives the motor guide rod (101) to rotate. The rotation of the motor guide rod (101) transmits power through the synchronous belt (6) and the synchronous pulley (7), thereby driving the at least two threaded guide rods (11) to rotate synchronously. As the threaded guide rods (11) rotate, the screen bracket (9) can move the screen (5) in a straight line along the optical axis.

9. The optical module according to claim 2, characterized in that: A mounting portion (902) is provided on one side of the screen bracket (9), the screen (5) is fixed to the mounting portion (902) by means of glue (8), and the screen (5) is located on a side of the screen bracket (9) facing away from the lens barrel (2).

10. The optical module according to claim 1, characterized in that: The outer surface of the side wall of the lens barrel (2) is provided with a first assembly portion (201) and at least two second assembly portions (202); The motor guide rod (101) is inserted into the first assembly portion (201); The threaded guide rod (11) is inserted into the second assembly portion (202).

11. A smart head mounted device, characterized in that: include: shell; and The optical module according to any one of claims 1 to 10, wherein the optical module is disposed in the housing.

Images