Optical module and wearable device

Abstract

The embodiment of the invention provides an optical module and wearable equipment. The optical module comprises a screen module which comprises a screen and a screen support, and the screen is arranged on the screen support; the lens cone module comprises a lens cone; the electromagnetic driving assembly comprises a coil and a permanent magnet, the coil is arranged on the side, close to the lens barrel, of the screen support in a sleeving mode, and the permanent magnet is arranged on the lens barrel; and the electromagnetic driving assembly is configured to be capable of driving the screen module to reciprocate along the optical axis direction of the lens cone module.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic products. More specifically, the embodiments of the present application relate to an optical module and a wearable device. Background Art

[0002] Mobile display terminals, such as mobile phones and tablets, are increasingly favored by users as screen virtual reality (VR) devices. These devices are usually VR helmets or VR glasses. In the current VR device design, an important adjustability feature is the ability to adjust the distance between the display terminal screen and the optical components to achieve precise focusing.

[0003] However, the current mechanisms for adjusting the screen distance in VR modules still mostly rely on traditional mechanical transmission methods, such as lead screws and worm gears, etc. These mechanical adjustment methods not only make the overall structural design relatively complex and cumbersome, but also take up space and bring noise problems, affecting the user experience.

[0004] In view of this, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0005] The purpose of this application is to provide a new technical solution for optical modules and wearable devices.

[0006] In a first aspect, an embodiment of the present application provides an optical module. The optical module includes:

[0007] A screen module, comprising a screen and a screen bracket, wherein the screen is arranged on the screen bracket;

[0008] A lens barrel module, comprising a lens barrel;

[0009] The electromagnetic drive assembly comprises a coil and a permanent magnet, wherein the coil is sleeved on a side of the screen bracket close to the lens barrel, and the permanent magnet is arranged on the lens barrel;

[0010] The electromagnetic driving assembly is configured to drive the screen module to reciprocate along the optical axis direction of the lens barrel module.

[0011] Optionally, when a first current is supplied to the coil, the screen module reciprocates along the optical axis direction of the lens barrel module under the action of electromagnetic force, and the first current is an alternating current.

[0012] Optionally, the screen bracket is provided with a first guide portion, and the first guide portion extends along the optical axis direction of the lens barrel module;

[0013] The inner wall of the lens barrel is provided with a guide groove, and the first guide portion is arranged in the guide groove;

[0014] A valve assembly is arranged in the guide groove, and the valve assembly has a first state and a second state;

[0015] When the valve assembly is in the first state, the valve assembly is configured to restrict the first guide portion within the guide groove;

[0016] When the valve assembly is in the second state, the valve assembly is configured to unlock the first guide portion;

[0017] When the first guide portion is in an unlocked state, the electromagnetic driving assembly is configured to be able to drive the screen module to reciprocate along the optical axis direction of the lens barrel module.

[0018] Optionally, the valve assembly comprises:

[0019] Two elastic components, the two elastic components are arranged on opposite surfaces of the guide groove;

[0020] An electromagnetic component is arranged on one side of each elastic component away from the inner wall of the guide groove;

[0021] When a second current is applied to the electromagnetic components, the two electromagnetic components move away from each other to unlock the first guide portion;

[0022] When no current is passed through the electromagnetic components, the two electromagnetic components restrict the first guide portion within the guide groove under the elastic force of the elastic component.

[0023] Optionally, two second guide portions which are arranged opposite to each other are arranged in the guide groove, and the elastic component is arranged on the second guide portions correspondingly.

[0024] Optionally, the inner wall of the lens barrel is provided with a plurality of mounting grooves, and the plurality of mounting grooves are evenly distributed on the inner wall of the lens barrel;

[0025] The permanent magnet is arranged in each of the installation grooves.

[0026] Optionally, a plurality of the first guide portions are provided on the screen bracket, and the plurality of the first guide portions are evenly distributed on the screen bracket;

[0027] A plurality of valve assemblies are disposed on the inner wall of the lens barrel, and the valve assemblies correspond to the first guide parts one by one.

[0028] Optionally, the outer side wall of the screen bracket is provided with a first limiting groove, and the outer side wall of the lens barrel is provided with a second limiting groove;

[0029] The optical module further includes a dustproof component, one side of which is disposed in the first limiting groove, and the other side of which is disposed in the second limiting groove.

[0030] Optionally, the screen bracket includes a bracket body and an annular portion arranged on the bracket body and extending along the optical axis direction of the lens barrel module, and the coil is wound around the annular portion.

[0031] In a second aspect, an embodiment of the present application further provides a wearable device, the wearable device comprising:

[0032] a housing; and

[0033] As in the optical module of the first aspect, the optical module is disposed in the housing.

[0034] According to the embodiment of the present application, the screen distance is adjusted by the electromagnetic drive assembly, which not only enables the optical module to have the ability to steplessly adjust the screen position, but also improves the accuracy and stability of the adjustment. At the same time, since the traditional mechanical transmission method is avoided, the electromagnetic drive assembly generates extremely low noise during operation, which improves the user experience. In addition, the structure of the electromagnetic drive assembly does not take up too much space in the optical module, which improves the portability of the optical module.

[0035] 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

[0036] 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.

[0037] Figure 1 Shown is a structural exploded view of the optical module provided in an embodiment of the present application.

[0038] Figure 2 The figure shows a cross-sectional view of an optical module provided in an embodiment of the present application. Figure 1 .

[0039] Figure 3 The figure shows a cross-sectional view of an optical module provided in an embodiment of the present application. Figure 2 .

[0040] Figure 4 Shown Figure 3 A magnified view of the structure in the middle.

[0041] Figure 5 Shown is a schematic structural diagram of a lens barrel provided in an embodiment of the present application.

[0042] Figure 6 Shown Figure 4Enlarged view of the structure at point B in the middle.

[0043] Description of reference numerals:

[0044] 1. screen module; 10. screen; 11. screen bracket; 111. bracket body; 112. annular portion; 12. first guide portion; 13. first limiting groove;

[0045] 2. Lens barrel module; 20. Lens barrel; 21. Lens; 201. Guide groove; 202. Mounting groove; 203. Second limiting groove;

[0046] 3. Electromagnetic drive assembly; 30. Coil; 31. Permanent magnet;

[0047] 4. valve assembly; 40. elastic component; 41. electromagnetic component; 42. second guide portion;

[0048] 5. Dust-proof parts. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] According to one aspect of an embodiment of the present application, an optical module is provided, and the optical module is suitable for use in a head mounted display (HMD), such as a VR head mounted display. The VR head mounted display device may include VR glasses or a VR helmet, etc., and the embodiment of the present application does not specifically limit this.

[0055] The present application embodiment provides an optical module, referring to Figure 1 and Figure 2 The optical module includes: a screen module 1, a lens barrel module 2 and an electromagnetic drive assembly 3. The screen module 1 includes a screen 10 and a screen bracket 11, and the screen 10 is arranged on the screen bracket 11; the lens barrel module 2 includes a lens barrel 20; the electromagnetic drive assembly 3 includes a coil 30 and a permanent magnet 31, and the coil 30 is sleeved on the side of the screen bracket 11 close to the lens barrel 20, and the permanent magnet 31 is arranged on the lens barrel 20. The electromagnetic drive assembly 3 is configured to drive the screen module 1 to reciprocate along the optical axis direction of the lens barrel module 2.

[0056] In other words, the optical module mainly includes a screen module 1, a lens barrel module 2 and an electromagnetic drive assembly 3, wherein the screen module 1 is composed of a screen 10 and a screen bracket 11, and the screen 10 is fixed to the screen bracket 11. For example, the screen 10 can be fixed to the screen bracket 11 by a bonding process, or by fastening the screen 10 to the screen bracket 11 by fasteners. For example, the screen 10 has a wide range of types, including but not limited to a smartphone screen 10 and a tablet screen 10.

[0057] The lens barrel module 2 combines the lens barrel 20 with at least one built-in lens 21, ensuring superior optical performance and comfortable visual experience.

[0058] It is worth mentioning that the optical module of the present application introduces an electromagnetic drive component 3. This design abandons the traditional mechanical transmission method and uses the principle of electromagnetic induction to achieve stepless adjustment of the distance between the screen 10 and the lens barrel module 2. This not only reduces the space occupied, but also maintains an extremely low noise level during operation, thereby improving the user experience.

[0059] Specifically, the electromagnetic drive assembly 3 includes a coil 30 and a permanent magnet 31, the coil 30 is sleeved on a side of the screen bracket 11 close to the lens barrel 20, and the permanent magnet 31 is installed on the lens barrel 20. Exemplarily, the permanent magnet 31 can be installed on the lens barrel 20 by bonding or embedding. In one example, a mounting groove 202 is provided on the inner wall of the lens barrel 20, and the permanent magnet 31 is arranged in the mounting groove 202. In another example, the permanent magnet 31 is bonded to the inner wall of the lens barrel 20.

[0060] When the coil 30 is energized, a magnetic field is generated around the coil 30 according to the principle of electromagnetic induction. The direction and intensity of this magnetic field depend on the direction and magnitude of the current. The magnetic field generated by the coil 30 interacts with the magnetic field of the permanent magnet 31. Due to the magnetic stability of the permanent magnet 31, when the direction and intensity of the magnetic field of the coil 30 change, a relative motion trend is generated with the permanent magnet 31. According to the Lorentz force law, when current passes through the coil 30, an electromagnetic force is generated on the coil 30. This electromagnetic force interacts with the magnetic force of the permanent magnet 31, thereby producing a pushing or pulling effect, driving the screen module 1 to move along the optical axis direction of the lens barrel module 2.

[0061] Exemplarily, when the first current is passed through the coil 30, the screen module 1 reciprocates along the optical axis direction of the lens barrel module 2 under the action of the electromagnetic force. For example, the first current is alternating current, and the direction of the magnetic field around the coil 30 is adjusted by changing the current direction to adjust the force between the permanent magnet 31 and the coil 30.

[0062] In one example, when the direction of the first current flowing through the coil 30 changes, the force between the coil 30 and the permanent magnet 31 can be adjusted from repulsion to attraction, or vice versa.

[0063] When the force between the coil 30 and the permanent magnet 31 is repulsive, the screen module 1 moves away from the lens barrel module 2, and the distance between the screen 10 and the lens barrel module 2 gradually increases. When the force between the coil 30 and the permanent magnet 31 is attractive, the screen module 1 moves toward the lens barrel module 2, and the distance between the screen 10 and the lens barrel module 2 gradually decreases.

[0064] Therefore, in the embodiment of the present application, the distance of the screen 10 is adjusted by the electromagnetic drive component 3, which not only enables the optical module to have the ability to steplessly adjust the position of the screen 10, but also improves the accuracy and stability of the adjustment. At the same time, since the traditional mechanical transmission method is avoided, the noise generated by the electromagnetic drive component 3 during operation is extremely low, which improves the user experience. In addition, the structure of the electromagnetic drive component 3 does not take up too much space in the optical module, which improves the portability of the optical module.

[0065] That is to say, in the embodiment of the present application, the moving direction and speed of the screen module 1 can be controlled by controlling the direction and magnitude of the first current in the coil 30. When the direction of the current changes, the direction of the magnetic field generated by the coil 30 will also change, thereby changing the direction of the interaction force with the permanent magnet 31, and realizing the reciprocating movement of the screen module 1.

[0066] In a further embodiment, referring to Figure 3-Figure 6 The screen bracket 11 is provided with a first guide portion 12, and the first guide portion 12 extends along the optical axis direction of the lens barrel module 2;

[0067] The inner wall of the lens barrel 20 is provided with a guide groove 201, and the first guide portion 12 is arranged in the guide groove 201;

[0068] The guide groove 201 is provided with a valve assembly 4, and the valve assembly 4 has a first state and a second state;

[0069] When the valve assembly 4 is in the first state, the valve assembly 4 is configured to restrict the first guide portion 12 within the guide groove 201;

[0070] When the valve assembly 4 is in the second state, the valve assembly 4 is configured to unlock the first guide portion 12;

[0071] When the first guide portion 12 is in an unlocked state, the electromagnetic driving assembly 3 is configured to be able to drive the screen module 1 to reciprocate along the optical axis direction of the lens barrel module 2 .

[0072] In this embodiment, a first guide portion 12 is provided on the screen bracket 11 . The first guide portion 12 extends along the optical axis direction of the lens barrel module 2 , and plays a role in guiding the movement of the screen module 1 .

[0073] At the same time, a guide groove 201 is provided on the inner wall of the lens barrel 20, and the first guide portion 12 is arranged inside the guide groove 201. Such a design not only ensures the stability of the screen module 1 during the movement, but also improves the accuracy of the adjustment.

[0074] In particular, a valve assembly 4 is disposed inside the guide groove 201. The valve assembly 4 has two working states: a first state and a second state. When the valve assembly 4 is in the first state, the valve assembly 4 will firmly lock the first guide portion 12 in the guide groove 201, ensuring that the screen module 1 remains stable when it does not need to move. When the valve assembly 4 is switched to the second state, the valve assembly 4 will unlock the first guide portion 12, allowing the screen module 1 to smoothly reciprocate along the optical axis direction of the lens barrel module 2 under the drive of the electromagnetic drive assembly 3.

[0075] Such a design allows the optical module to be flexible in adjusting the position of the screen 10, and also ensures the stability and reliability of the adjustment process. At the same time, due to the design of the valve assembly 4, we can lock or unlock the screen module 1 when needed, providing users with a more convenient and efficient use experience.

[0076] It should be noted that the structure of the valve assembly 4 is not particularly limited in the embodiment of the present application, as long as the valve assembly 4 can realize the position locking and unlocking of the first guide portion 12. Exemplarily, the valve assembly 4 includes but is not limited to a buckle and a snap ring matching structure. When the buckle and the snap ring match, the valve assembly 4 has a locking function for the first guide portion 12. When the buckle and the snap ring fall off (matching failure), the valve assembly 4 unlocks the first guide portion 12.

[0077] In a specific embodiment, referring to Figure 3-Figure 6 , the valve assembly 4 comprises:

[0078] Two elastic components 40, the two elastic components 40 are arranged on opposite surfaces of the guide groove 201;

[0079] An electromagnetic component 41 is disposed on a side of each elastic component 40 away from the inner wall of the guide groove 201;

[0080] When the second current is applied to the electromagnetic components 41, the two electromagnetic components 41 move away from each other to unlock the first guide portion 12;

[0081] When no current is supplied to the electromagnetic components 41 , the two electromagnetic components 41 restrict the first guide portion 12 in the guide groove 201 under the elastic force of the elastic component 40 .

[0082] In this specific embodiment, the valve assembly 4 mainly realizes the locking and unlocking functions of the first guide portion 12 through the cooperation of the electromagnetic component 41 and the elastic component 40 .

[0083] Specifically, two elastic components 40 are configured in the valve assembly 4, and the two elastic components 40 are respectively installed on the inner walls of the guide groove 201 on both sides. These elastic components 40 (such as springs) need to have elastic restoring force and can maintain a stable shape and position when not affected by external forces.

[0084] Corresponding to each elastic component 40, an electromagnetic component 41 is respectively arranged on the side thereof away from the inner wall of the guide groove 201. The first guide portion 12 is arranged in the guide groove 201, and the first guide portion 12 is located between the two electromagnetic components 41. Exemplarily, the electromagnetic component 41 can be an electromagnet.

[0085] When a second current (usually a current of a specific direction and magnitude) is passed through the electromagnetic components 41, the two electromagnetic components 41 are acted upon by the magnetic field force and move in opposite directions. For example, when the second current is passed through the two electromagnetic components 41, the polarities of the electromagnetic components 41 are the same, and the two electromagnetic components 41 repel each other.

[0086] When the two electromagnetic components 41 move in opposite directions, the electromagnetic component 41 compresses the elastic component 40, causing the elastic component 40 to deform. At the same time, since the interaction between the electromagnetic component 41 and the first guide portion 12 is weakened or disappears, the first guide portion 12 switches from the locked state to the unlocked state, and the screen module 1 can move freely under the drive of the electromagnetic drive assembly 3.

[0087] When no current flows into the electromagnetic component 41 (i.e., it is in the power-off state), the elastic component 40 will use the elastic restoring force to push the two electromagnetic components 41 back to the initial position. In this process, the electromagnetic component 41 is pressed against the first guide portion 12 by the elastic component 40, and the electromagnetic component 41 and the first guide portion 12 are locked in the guide groove 201 by the friction between the electromagnetic component 41 and the first guide portion 12. This locked state ensures that the screen module 1 can maintain a stable position when it does not need to be moved.

[0088] Furthermore, when the elastic component 40 uses its elastic restoring force to push the two electromagnetic components 41 toward each other, a third current can be passed through the two electromagnetic components 41, so that the two electromagnetic components 41 attract each other, and the first guide portion 12 is further locked in the guide groove 201 by means of the attraction between the two electromagnetic components 41.

[0089] Therefore, in this embodiment, the valve assembly 4 combines the dual advantages of electromagnetic locking and mechanical locking, ensuring the stability and reliability of the screen module 1 during movement. In addition, by controlling the power-on state of the electromagnetic component 41, the locking and unlocking functions of the screen module 1 can be realized, improving the user experience.

[0090] Optionally, refer to Figure 4 and Figure 5 In order to enhance the locking force of the electromagnetic component 41 on the first guide portion 12, four elastic components 40 are arranged in the guide groove 201, and each elastic component 40 is provided with an electromagnetic component 41. In this way, the first guide portion 12 is locked by the four electromagnetic components 41, thereby ensuring the firmness of the locking of the first guide portion 12.

[0091] In a further embodiment, referring to Figure 5 and Figure 6 The guide groove 201 is provided with two second guide portions 42 which are arranged opposite to each other, and the elastic component 40 is correspondingly arranged on the second guide portions 42 .

[0092] In this embodiment, two second guide portions 42 are arranged opposite to each other inside the guide groove 201. The second guide portions 42 provide a basis for the installation of the elastic component 40. In addition, the second guide portions 42 also have a guiding function, ensuring that the elastic component 40 can be deformed along a predetermined direction when compressed or stretched, thereby accurately controlling the locking and unlocking operations of the valve assembly 4 on the first guide portion 12.

[0093] Exemplarily, the number of the second guide portions 42 corresponds to the number of the elastic components 40 .

[0094] In one embodiment, referring to Figure 1 The inner wall of the lens barrel 20 is provided with a plurality of mounting grooves 202 , and the plurality of mounting grooves 202 are evenly distributed on the inner wall of the lens barrel 20 ; the permanent magnet 31 is disposed in each of the mounting grooves 202 .

[0095] In this embodiment, a plurality of mounting grooves 202 are provided inside the lens barrel 20, and the permanent magnets 31 are correspondingly fixed in the mounting grooves 202. This not only ensures that the permanent magnets 31 can be firmly fixed inside the lens barrel 20, but also, through the evenly distributed mounting grooves 202 (the permanent magnets 31 are arranged in the mounting grooves 202), the permanent magnets 31 can more effectively generate a magnetic field, which is more conducive to the electromagnetic drive assembly 3 driving the screen module 1 to reciprocate.

[0096] In one embodiment, referring to Figure 3 and Figure 4 , a plurality of the first guide portions 12 are provided on the screen bracket 11, and the plurality of the first guide portions 12 are evenly distributed on the screen bracket 11;

[0097] A plurality of valve assemblies 4 are disposed on the inner wall of the lens barrel 20 , and the valve assemblies 4 correspond to the first guide portions 12 one by one.

[0098] In this embodiment, in order to ensure the balance of the movement of the screen module 1, a plurality of first guide portions 12 are provided on the screen bracket 11, and the plurality of first guide portions 12 are evenly distributed on the screen bracket 11. For example, the first guide portions 12 are evenly distributed on the screen bracket 11, ensuring the balance and stability of the structure.

[0099] At the same time, the inner wall of the lens barrel 20 is also provided with a plurality of valve assemblies 4. These valve assemblies 4 form a one-to-one correspondence with the first guide portions 12 on the screen bracket 11, ensuring that each first guide portion 12 can be unlocked and locked by the corresponding valve assembly 4.

[0100] Exemplarily, three first guide portions 12 are disposed on the screen bracket 11 , and correspondingly, three valve assemblies 4 are disposed on the inner wall of the lens barrel 20 , and each valve assembly 4 correspondingly unlocks or locks one of the first guide portions 12 .

[0101] In one embodiment, referring to Figure 1 and Figure 2 The outer wall of the screen bracket 11 is provided with a first limiting groove 13, and the outer wall of the lens barrel 20 is provided with a second limiting groove 203;

[0102] The optical module further includes a dustproof component 5 , one side of which is disposed in the first limiting groove 13 , and the other side of which is disposed in the second limiting groove 203 .

[0103] In this embodiment, a circle of first limiting grooves 13 are provided in the circumferential direction of the outer wall of the screen bracket 11, and a circle of second limiting grooves 203 are provided in the circumferential direction of the outer wall of the lens barrel 20. A clamp on one side of the dustproof component 5 is in the first limiting groove 13, and a clamp on the other side is in the second limiting groove 203, so as to seal the inside of the optical module. Exemplarily, the dustproof component 5 seals the coil 30 provided on the screen bracket 11, and the permanent magnet 31 and the valve assembly 4 provided inside the lens barrel 20.

[0104] Exemplarily, the dustproof component 5 may be a flexible dustproof sleeve.

[0105] In one embodiment, the screen bracket 11 includes a bracket body 111 and an annular portion 112 disposed on the bracket body 111 and extending along the optical axis direction of the lens barrel module 2 , and the coil 30 is wound around the annular portion 112 .

[0106] In this embodiment, the screen support 11 includes a support body 111 , the support body 111 is formed with a hollow portion, the screen 10 is disposed on the support body 111 and away from the annular portion 112 , and the effective area of ​​the screen 10 corresponds to the hollow portion.

[0107] The bracket body 111 is formed with an annular portion 112, and the coil 30 is wound around the annular portion 112, and the coil 30 can be closely and evenly attached to the surface of the annular portion 112. When powered on, the coil 30 generates a magnetic field, which interacts with the permanent magnet 31 in the lens barrel 20, thereby generating a driving force, so that the screen module 1 can reciprocate along the optical axis direction of the lens barrel module 2.

[0108] Exemplarily, the first guide portion 12 provided on the screen bracket 11 may be provided on the bracket body 111 and located outside the annular portion 112 .

[0109] According to another aspect of an embodiment of the present application, a wearable device is further provided, the wearable device comprising a housing and the optical module as described above, wherein the optical module is disposed in the housing.

[0110] The wearable device may be a VR head-mounted device, for example, the electronic device may be VR glasses or a VR helmet, etc., and the embodiments of the present application do not impose any specific restrictions on this.

[0111] 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.

[0112] 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 screen module (1) comprises a screen (10) and a screen support (11), wherein the screen (10) is arranged on the screen support (11); A lens barrel module (2), comprising a lens barrel (20); An electromagnetic drive assembly (3) comprising a coil (30) and a permanent magnet (31), wherein the coil (30) is sleeved on a side of the screen bracket (11) close to the lens barrel (20), and the permanent magnet (31) is arranged on the lens barrel (20); The electromagnetic driving component (3) is configured to be able to drive the screen module (1) to move back and forth along the optical axis direction of the lens barrel module (2).

2. The optical module according to claim 1, characterized in that: When a first current is passed through the coil (30), the screen module (1) moves back and forth along the optical axis direction of the lens barrel module (2) under the action of electromagnetic force, and the first current is an alternating current.

3. The optical module according to claim 1, characterized in that: The screen bracket (11) is provided with a first guide portion (12), and the first guide portion (12) extends along the optical axis direction of the lens barrel module (2); The inner wall of the lens barrel (20) is provided with a guide groove (201), and the first guide portion (12) is arranged in the guide groove (201); A valve assembly (4) is arranged in the guide groove (201), and the valve assembly (4) has a first state and a second state; When the valve assembly (4) is in the first state, the valve assembly (4) is configured to restrict the first guide portion (12) within the guide groove (201); When the valve assembly (4) is in the second state, the valve assembly (4) is configured to unlock the first guide portion (12); When the first guide portion (12) is in an unlocked state, the electromagnetic drive assembly (3) is configured to be able to drive the screen module (1) to move back and forth along the optical axis direction of the lens barrel module (2).

4. The optical module according to claim 3, characterized in that: The valve assembly (4) comprises: Two elastic components (40), the two elastic components (40) being arranged on opposite surfaces of the guide groove (201); An electromagnetic component (41) is provided on a side of each elastic component (40) facing away from the inner wall of the guide groove (201); When a second current is passed through the electromagnetic components (41), the two electromagnetic components (41) move in directions away from each other to unlock the first guide portion (12); When no current is passed through the electromagnetic components (41), the two electromagnetic components (41) restrict the first guide portion (12) within the guide groove (201) under the elastic force of the elastic component (40).

5. The optical module according to claim 4, characterized in that: Two second guide portions (42) arranged opposite to each other are arranged in the guide groove (201), and the elastic component (40) is correspondingly arranged on the second guide portions (42).

6. The optical module according to claim 1, characterized in that: The inner wall of the lens barrel (20) is provided with a plurality of mounting grooves (202), and the plurality of mounting grooves (202) are evenly distributed on the inner wall of the lens barrel (20); and the permanent magnet (31) is arranged in each mounting groove (202).

7. The optical module according to claim 3, characterized in that: The screen bracket (11) is provided with a plurality of the first guide portions (12), and the plurality of the first guide portions (12) are evenly distributed on the screen bracket (11); A plurality of valve assemblies (4) are arranged on the inner wall of the lens barrel (20), and the valve assemblies (4) correspond one to one to the first guide portions (12).

8. The optical module according to claim 1, characterized in that: The outer wall of the screen bracket (11) is provided with a first limiting groove (13), and the outer wall of the lens barrel (20) is provided with a second limiting groove (203); The optical module further comprises a dustproof component (5), one side of the dustproof component (5) being arranged in the first limiting groove (13), and the other side of the dustproof component (5) being arranged in the second limiting groove (203).

9. The optical module according to claim 1, characterized in that: The screen bracket (11) comprises a bracket body (111) and an annular portion (112) arranged on the bracket body (111) and extending along the optical axis direction of the lens barrel module (2), and the coil (30) is wound around the annular portion (112).

10. A wearable device, characterized in that: include: case; as well as The optical module according to any one of claims 1 to 9, wherein the optical module is disposed in the housing.

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