Adjustment mechanism, lens and electronic equipment

Abstract

The present invention discloses an adjustment mechanism, a lens, and an electronic device, relating to the field of lens focusing technology. The adjustment mechanism includes a driving member, a focusing barrel, and an identification structure. The focusing barrel is drivingly connected to the driving member, the focusing barrel is provided with a movable cavity for accommodating the lens barrel, and the identification structure is provided on the focusing barrel. The driving member drives the focusing barrel to rotate, and the identification structure is used to identify and locate the position of the focusing barrel. The present invention aims to provide an adjustment mechanism for achieving rapid focusing. When applied to a lens and electronic device, the adjustment mechanism can achieve rapid focusing and improve focusing accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of lens focusing, and in particular to an adjusting mechanism and a lens and electronic equipment using the adjusting mechanism. Background Art

[0002] With the development of micro-projector technology, home projectors are increasingly becoming popular, with a trend towards miniaturization and portability. The portability of micro-projectors necessitates a frequently changing projection distance. To meet these demands, a variable-zoom design is required for the optical engine. Simultaneously, the lens needs to be driven by a motor for electric focus adjustment, ensuring a clear projection image at varying projection distances.

[0003] Currently, the focus adjustment solution for micro projectors on the market primarily uses a stepper motor. During the focusing process, the motor first returns to its starting point, and a rangefinder sensor determines the distance between the lens and the screen. The lens is then moved to a pre-calibrated position by controlling the number of steps the stepper motor advances. However, this open-loop control of the stepper motor's step count is unable to eliminate the effects of motor hysteresis and lost steps caused by transmission component tolerances and variations in the motor itself. Furthermore, it provides no feedback on the current lens position, leading to issues such as lengthy focusing times and poor accuracy. Summary of the Invention

[0004] The main purpose of the present invention is to provide an adjustment mechanism, a lens and an electronic device, aiming to provide an adjustment mechanism for achieving rapid focusing. The adjustment mechanism can be applied to the lens and the electronic device to achieve rapid focusing and improve the focusing accuracy.

[0005] To achieve the above object, the present invention provides an adjustment mechanism applied to a lens, the adjustment mechanism comprising:

[0006] driving parts;

[0007] A focusing barrel, the focusing barrel being in driving connection with the driving member, the focusing barrel being provided with a movable cavity, the movable cavity being used to accommodate the lens barrel of the lens; and

[0008] an identification structure, the identification structure being provided on the focusing barrel;

[0009] The driving member drives the focusing barrel to rotate, and the identification structure is used to identify and locate the position of the focusing barrel.

[0010] In one embodiment, the recognition structure comprises:

[0011] a baffle, the baffle being provided on the outer wall of the focusing barrel and having an identification hole; and

[0012] An optical coupling detection member, the optical coupling detection member is arranged opposite to the focusing tube, the optical coupling detection member is provided with a detection groove, and the baffle is movably accommodated in the detection groove;

[0013] The driving member drives the focusing barrel to drive the blocking piece to rotate, so that the blocking piece moves along the detection slot, and the detection slot identifies and locates the position of the focusing barrel by detecting the identification hole.

[0014] In one embodiment, the identification hole is arranged to extend in an arc shape with the center of the active cavity as the center, so that the identification hole has a first end and a second end;

[0015] Wherein, the size of the identification hole gradually decreases from the first end to the second end.

[0016] In one embodiment, the focusing tube is further provided with a guide hole communicating with the movable cavity, and the guide hole extends spirally along the outer wall of the focusing tube;

[0017] The arc length from the first end to the second end is defined as the length of the identification hole, and the length of the identification hole is greater than or equal to the extension length of the guide hole.

[0018] In one embodiment, the angle formed by the first end and the second end and the center of the active cavity is less than or equal to 30°;

[0019] And / or, the guide hole includes a plurality of guide holes, and the plurality of guide holes are arranged at intervals on the focusing barrel.

[0020] In one embodiment, the optical coupling detection component includes an optical coupling plate and an optical coupler provided on the optical coupling plate, the optical coupler has a transmitting end and a receiving end that are relatively arranged, and the transmitting end and the receiving end cooperate to form the detection slot.

[0021] In one embodiment, the optical coupling plate is further provided with a limiting groove adjacent to the optical coupler, and the end of the blocking piece away from the outer wall of the focusing barrel is movably accommodated in the limiting groove, and the end surface of the blocking piece away from the outer wall of the focusing barrel is movably abutted against the bottom wall of the limiting groove;

[0022] And / or, the identification structure further includes a processing chip, the processing chip is electrically connected to the optical coupler, the processing chip is used to identify the displacement and moving direction of the focusing barrel according to the detection signal emitted by the optical coupler, and issue a focusing instruction;

[0023] And / or, the baffles include two, and the two baffles are spaced apart and arranged on the outer wall of the focusing ring along the axial direction of the movable cavity; the optical couplers include two, and each optical coupler is arranged corresponding to one baffle.

[0024] In one embodiment, the identification structure includes a magnetic ring, a Hall sensor and a processing chip. The magnetic ring is arranged on the outer wall of the focusing barrel, the Hall sensor is arranged opposite to the magnetic ring, and the processing chip is electrically connected to the Hall sensor for identifying the displacement and moving direction of the focusing barrel according to the detection signal emitted by the Hall sensor, and issuing a focusing instruction.

[0025] In one embodiment, a rack is provided on the outer wall of the focusing barrel, and the driving member is provided with a driving gear, and the driving gear is meshedly connected with the rack;

[0026] The driving member drives the driving gear to rotate, so that the rack drives the focusing barrel to rotate.

[0027] The present invention further provides a lens, comprising a lens barrel and the aforementioned adjustment mechanism, wherein the lens barrel is movably disposed in a movable cavity of the adjustment mechanism.

[0028] The present invention also provides an electronic device, which includes the lens described above.

[0029] The adjustment mechanism of the technical solution of the present invention is achieved by connecting the focusing barrel with the driving member through a transmission, and providing a movable cavity for accommodating the lens barrel in the focusing barrel, so that the driving member drives the focusing barrel to rotate to achieve the focusing of the lens; at the same time, by providing an identification structure in the focusing barrel, the position of the focusing barrel is identified and located in real time by the identification structure during the process of the driving member driving the focusing barrel to rotate, which can avoid the backlash caused by the driving member itself and the cooperation with the focusing ring, thereby achieving precise positioning of the current position of the focusing barrel, so that the lens can achieve fast and accurate automatic focusing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of an embodiment of an adjustment mechanism provided by the present invention;

[0032] Figure 2 A schematic structural diagram of an embodiment of a driving member provided by the present invention;

[0033] Figure 3 A schematic structural diagram of an embodiment of a focusing tube provided by the present invention;

[0034] Figure 4This is a structural schematic diagram of an embodiment of the optical coupling detection element provided by the present invention.

[0035] Description of Figure Numbers:

[0036] 100. Adjustment mechanism; 1. Driving member; 11. Driving gear; 2. Focusing tube; 21. Movable cavity; 22. Blocking piece; 221. Identification hole; 222. First end; 223. Second end; 23. Guide hole; 24. Rack; 3. Identification structure; 31. Optocoupler detection member; 311. Optocoupler plate; 312. Limiting groove; 313. Optocoupler; 314. Transmitting end; 315. Receiving end; 316. Detection groove.

[0037] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0041] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] With the development of micro-projector technology, home projectors are increasingly becoming popular, with a trend towards miniaturization and portability. The portability of micro-projectors necessitates a frequently changing projection distance. To meet these demands, a variable-zoom design is required for the optical engine. Simultaneously, the lens needs to be driven by a motor for electric focus adjustment, ensuring a clear projection image at varying projection distances.

[0043] Currently, the focus adjustment solution for micro projectors on the market primarily uses a stepper motor. During the focusing process, the motor first returns to its starting point, and a rangefinder sensor determines the distance between the lens and the screen. The lens is then moved to a pre-calibrated position by controlling the number of steps the stepper motor advances. However, this open-loop control of the stepper motor's step count is unable to eliminate the effects of motor hysteresis and lost steps caused by transmission component tolerances and variations in the motor itself. Furthermore, it provides no feedback on the current lens position, leading to issues such as lengthy focusing times and poor accuracy.

[0044] Based on the above concepts and problems, the present invention proposes an adjustment mechanism 100. It is understood that the adjustment mechanism 100 is applied to a lens, thereby adjusting the lens focal length through the adjustment mechanism 100, thereby adjusting the lens focus to achieve a clear image. In this embodiment, the lens can be applied to electronic devices, such as projectors and other projection equipment, cameras, or other devices that require a lens for projection, illumination, etc., without limitation herein.

[0045] As will be understood, the lens includes a lens barrel, an optical engine, and an adjustment mechanism 100. The lens barrel is movably disposed within the movable cavity 21 of the adjustment mechanism 100. The adjustment mechanism 100 enables the lens barrel to move within the movable cavity 21, thereby achieving focusing of the lens. The optical engine is connected to the lens barrel and is used to achieve light emission or image output through the lens barrel, etc., which is not limited here. It should be noted that the lens also includes a control structure or control circuit that can control the operation of components such as the optical engine, lens barrel, and adjustment mechanism 100, which is not limited here.

[0046] Please refer to Figures 1 to 4 As shown, in an embodiment of the present invention, the adjustment mechanism 100 includes a driving member 1, a focusing barrel 2 and an identification structure 3. The focusing barrel 2 is transmission-connected to the driving member 1. The focusing barrel 2 is provided with a movable cavity 21. The movable cavity 21 is used to accommodate the lens barrel of the lens. The identification structure 3 is provided on the focusing barrel 2. The driving member 1 drives the focusing barrel 2 to rotate, and the identification structure 3 is used to identify and locate the position of the focusing barrel 2.

[0047] In this embodiment, the driving member 1 of the adjustment mechanism 100 is used to provide driving force for the focusing tube 2 to rotate. The driving member 1 can be a driving motor, a driving motor, a servo motor or other structures that can drive the focusing tube 2 to rotate, and is not limited here.

[0048] To facilitate the processing, installation, and maintenance of the focusing cylinder 2, the focusing cylinder 2 is connected to the driver 1 through a transmission structure. Specifically, the focusing cylinder 2 is connected to the output end of the driver 1 through a transmission structure. It is understood that the focusing cylinder 2 can be connected to the output end of the driver 1 through a gear structure, a chain, a transmission rod, or other transmission structure, which is not limited here.

[0049] To facilitate lens focal length adjustment using the focusing barrel 2, in this embodiment, the focusing barrel 2 is provided with a movable cavity 21 for accommodating the lens barrel. It will be appreciated that to achieve focusing, when the focusing barrel 2 is rotated by the driving member 1, the lens barrel can move along the axial direction of the movable cavity 21 of the focusing barrel 2. This is achieved by converting the rotation of the focusing barrel 2 about the central axis of the movable cavity 21 into linear movement of the lens barrel along the extension direction of the central axis of the movable cavity 21.

[0050] In this embodiment, the active cavity 21 of the focusing tube 2 may be a cylindrical cavity, which can facilitate the relative rotation of the focusing tube 2 and the lens barrel and ensure the linear movement of the lens barrel along the extension direction of the central axis of the active cavity 21 .

[0051] It can be understood that in order to achieve fast and accurate focusing, an identification structure 3 is provided on the focusing barrel 2. In this way, when the driving member 1 drives the focusing barrel 2 to rotate, the identification structure 3 is used to identify and locate the position of the focusing barrel 2, thereby avoiding the backlash caused by the driving member 1 itself and the cooperation with the focusing barrel 2, thereby achieving precise positioning of the current position of the focusing barrel 2, so that the lens can achieve fast and accurate automatic focusing.

[0052] In this embodiment, the recognition structure 3 detects and locates the displacement and direction of the focusing barrel 2 during its rotation, thereby issuing a focusing command based on the detected displacement and direction of the focusing barrel 2. It is understood that the recognition structure 3 may be a laser detection structure, a Hall effect electromagnetic structure, or other structure capable of detecting the displacement and direction of the focusing barrel 2, without limitation herein.

[0053] The adjustment mechanism 100 of the present invention is achieved by connecting the focusing barrel 2 with the driving member 1 through a transmission, and providing the focusing barrel 2 with a movable cavity 21 for accommodating the lens barrel, so that the driving member 1 drives the focusing barrel 2 to rotate to achieve the focusing of the lens; at the same time, by providing an identification structure 3 on the focusing barrel 2, the position of the focusing barrel 2 is identified and located in real time by the identification structure 3 during the process of the driving member 1 driving the focusing barrel 2 to rotate, which can avoid the backlash caused by the driving member 1 itself and the cooperation with the focusing barrel 2, thereby achieving precise positioning of the current position of the focusing barrel 2, so that the lens can achieve fast and accurate automatic focusing.

[0054] In one embodiment, the identification structure 3 includes a baffle 22 and an optical coupling detection member 31. The baffle 22 is arranged on the outer wall of the focusing barrel 2. The baffle 22 is provided with an identification hole 221. The optical coupling detection member 31 is arranged opposite to the focusing barrel 2. The optical coupling detection member 31 is provided with a detection groove 316. The baffle 22 is movably accommodated in the detection groove 316; wherein the driving member 1 drives the focusing barrel 2 to drive the baffle 22 to rotate, so that the baffle 22 moves along the detection groove 316, and the detection groove 316 identifies and locates the position of the focusing barrel 2 by detecting the identification hole 221.

[0055] In this embodiment, if Figure 1 、 Figure 3 and Figure 4 As shown, by configuring the identification structure 3 as a baffle 22 and an optical coupling detection member 31, the optical coupling detection member 31 cooperates with the baffle 22 to realize identification and positioning of the position of the focusing barrel 2 during rotation. Optionally, the optical coupling detection member 31 can be an optical coupling sensor or a photoelectric sensor.

[0056] It can be understood that the baffle 22 is arranged on the outer wall of the focusing tube 2. By providing an identification hole 221 on the baffle 22 and providing a detection groove 316 on the optical coupling detection member 31, the baffle 22 is movably accommodated in the detection groove 316. In this way, when the driving member 1 drives the focusing tube 2 to drive the baffle 22 to rotate, the baffle 22 can move along the detection groove 316, that is, the baffle 22 moves relative to the detection groove 316, so that the detection groove 316 of the optical coupling detection member 31 can identify the position of the focusing tube 2 through the detection identification hole 221.

[0057] In this embodiment, the baffle 22 can be fixed to the outer wall of the focusing barrel 2, for example, by welding or by integrally forming a structure, which is not limited here. Of course, the baffle 22 can also be removably mounted to the outer wall of the focusing barrel 2 so that the baffle 22 and the focusing barrel 2 are relatively fixed, for example, by using a snap connection, plug-in fit, screw connection, or pin connection, which is not limited here. Optionally, the baffle 22 and the focusing barrel 2 are integrally formed.

[0058] It should be noted that to facilitate the rotation or twirling of the focusing barrel 2 under the drive of the driving member 1, the focusing barrel 2 may be of a cylindrical structure. Alternatively, the focusing barrel 2 may be of a cylindrical structure, which is not limited herein. In this embodiment, the blocking piece 22 rotates with the rotation of the focusing barrel 2, that is, the blocking piece 22 rotates synchronously with the focusing barrel 2. As the blocking piece 22 rotates, it moves relative to the optical coupler detection member 31.

[0059] Optionally, the baffle 22 is an arc-shaped plate-like structure extending circumferentially along the outer wall of the focusing tube 2. In this embodiment, the end surface of the baffle 22 facing away from the outer wall of the focusing tube 2 is an arc-shaped surface. As a result, when the driver 1 drives the focusing tube 2 to rotate, the baffle 22 moves along the detection slot 316, allowing the detection slot 316 to identify and locate the position of the focusing tube 2 through the detection hole 221.

[0060] In one embodiment, the identification hole 221 is extended in an arc shape with the center of the active cavity 21 as the center, so that the identification hole 221 has a first end 222 and a second end 223; wherein the size of the identification hole 221 gradually decreases from the first end 222 to the second end 223.

[0061] In this embodiment, if Figure 1 and Figure 3 As shown, the identification hole 221 can be an arc-shaped hole structure. Optionally, the identification hole 221 is arranged as an arc-shaped hole with the intersection of the central axis of the active cavity 21 and the plane of the baffle 22 as the center. It can be understood that the identification hole 221 passes through the baffle 22, which facilitates detection and identification by the optical coupler detection element 31 through the identification hole 221.

[0062] As can be understood, the identification hole 221 extends from a first end 222 to a second end 223. In this embodiment, the size of the identification hole 221 can optionally decrease gradually from the first end 222 to the second end 223. This configuration allows the optical coupling detection member 31 to identify and locate the rotational position of the focusing barrel 2 based on the different sizes of the identification hole 221.

[0063] In this embodiment, the identification hole 221 has a first inner wall and a second inner wall that are opposed to each other. Both the first inner wall and the second inner wall extend from a first end 222 to a second end 223, with the first inner wall being adjacent to the outer wall of the focusing tube 2. Optionally, the distance between the first inner wall of the identification hole 221 and the outer wall of the focusing tube 2 is the same from the first end 222 to the second end 223. It will be appreciated that the distance between the second inner wall of the identification hole 221 and the first inner wall gradually decreases from the first end 222 to the second end 223.

[0064] Of course, in other embodiments, the distance between the second inner wall of the identification hole 221 and the outer wall of the focusing tube 2 can be the same from the first end 222 to the second end 223, and the distance between the first inner wall and the second inner wall of the identification hole 221 gradually decreases from the first end 222 to the second end 223, which is not limited here.

[0065] In one embodiment, the focusing tube 2 is further provided with a guide hole 23 connected to the active cavity 21, and the guide hole 23 extends spirally along the outer wall of the focusing tube 2; the arc length from the first end 222 to the second end 223 is defined as the length of the identification hole 221, and the length of the identification hole 221 is greater than or equal to the extension length of the guide hole 23.

[0066] In this embodiment, if Figure 1 As shown, by opening a guide hole 23 on the side wall of the focusing barrel 2, the guide hole 23 extends spirally along the outer wall of the focusing barrel 2. In this way, when the lens barrel is installed in the active cavity 21, the protrusion or guide block of the lens barrel is passed through the guide hole 23. At this time, when the driving member 1 drives the focusing barrel 2 to rotate relative to the lens barrel, the protrusion or guide block of the lens barrel moves along the guide hole 23, thereby generating a linear displacement in the axial direction of the active cavity 21.

[0067] It will be appreciated that the guide hole 23 spirally extends along the outer wall of the focusing barrel 2 to form a first end and a second end, with the projections of the first end and the second end on the central axis of the active cavity 21 being spaced apart in the axial direction of the central axis of the active cavity 21. In this embodiment, the first and second ends of the guide hole 23 limit the movement of the projection or guide block of the lens barrel. That is, when the projection or guide block moves from the first end of the guide hole 23 to the second end, the distance the lens barrel moves in the active cavity 21 is the distance between the projections of the first and second ends on the central axis of the active cavity 21, which is not limited herein.

[0068] In this embodiment, the arc length from the first end 222 to the second end 223 is defined as the length of the identification hole 221, and the distance from the first end to the second end of the guide hole 23 is defined as the extension length of the guide hole 23. Optionally, the length of the identification hole 221 is greater than or equal to the extension length of the guide hole 23. As can be understood, this ensures effective detection by the optical coupler detection element 31.

[0069] Optionally, the angle formed by the first end 222 and the second end 223 and the center of the active cavity 21 is less than or equal to 30°. Figure 3 As shown, the angle formed by the first end 222 and the second end 223 of the identification hole 221 and the central axis of the active cavity 21 is the central angle corresponding to the identification hole 221, and the central angle is less than or equal to 30°. Optionally, the central angle corresponding to the identification hole 221 is less than or equal to 20°, which is not limited here.

[0070] In order to further ensure the smooth movement of the lens barrel in the movable chamber 21 , in one embodiment, the guide hole 23 may optionally include a plurality of guide holes 23 , which are spaced apart in the focusing barrel 2 .

[0071] In this embodiment, if Figure 1 As shown, the first ends of the plurality of guide holes 23 are located on the same circumference, the second ends of the plurality of guide holes 23 are located on the same circumference, and the extension lengths of the plurality of guide holes 23 are the same.

[0072] In one embodiment, if Figure 1 and Figure 4As shown, the optical coupling detection element 31 includes an optical coupling plate 311 and an optical coupler 313 provided on the optical coupling plate 311 . The optical coupler 313 has a transmitting end 314 and a receiving end 315 that are oppositely arranged. The transmitting end 314 and the receiving end 315 cooperate to form a detection slot 316 .

[0073] In this embodiment, the optical coupling plate 311 of the optical coupling detection element 31 can be a substrate or a circuit board. The optical coupling plate 311 is opposite the outer wall of the focusing barrel 2. When the driving element 1 drives the focusing barrel 2 to rotate, the optical coupling detection element 31 does not rotate with the focusing barrel 2. It is understood that the optical coupling plate 311 of the optical coupling detection element 31 can be fixed to the housing of the lens or the housing of the electronic device, which is not limited here.

[0074] It can be understood that by arranging the transmitting end 314 and the receiving end 315 of the optical coupler 313 relative to each other on the optical coupling plate 311, the transmitting end 314 and the receiving end 315 cooperate to form a detection slot 316. In this way, after the transmitting end 314 of the optical coupler 313 emits light or a signal, the light or signal passes through the identification hole 221 and is received by the receiving end 315, thereby forming a detection signal.

[0075] In this embodiment, the transmitting end 314 and receiving end 315 of the optical coupler 313 are located on opposite sides of the baffle 22. Because the size of the identification hole 221 gradually decreases from the first end 222 to the second end 223, when the driver 1 drives the focusing barrel 2 to rotate the baffle 22, the light or signal emitted by the transmitting end 314 of the optical coupler 313 from the first end 222 to the second end 223 is gradually blocked by the baffle 22. At this time, the light or signal received by the receiving end 315 from the first end 222 to the second end 223 gradually changes, thereby forming an analog level signal. By identifying the level signal output by the optical coupler detection element 31, the current position of the focusing barrel 2 can be quickly located, which is equivalent to providing the focusing barrel 2 with an identifier that can be identified by the optical coupler. It can be understood that identifying the position of the focusing barrel 2 in this way can avoid the hysteresis caused by the driver 1 itself and the coordination between the driver 1 and the focusing barrel 2, accurately locate the current focus position, and achieve fast and accurate autofocus.

[0076] To further enable rapid focusing, in one embodiment, the recognition structure 3 further includes a processing chip electrically connected to the optical coupler 313. The processing chip is configured to identify the displacement and movement direction of the focusing barrel 2 based on the detection signal emitted by the optical coupler 313 and to issue a focusing instruction. It will be appreciated that the processing chip is configured to process the detection signal from the optical coupler detection element 31 and generate a focusing signal or instruction based on the detection signal, which is not limited herein.

[0077] In one embodiment, the optical coupling plate 311 is further provided with a limiting groove 312 adjacent to the optical coupler 313, and the end of the blocking piece 22 away from the outer wall of the focusing tube 2 is movably accommodated in the limiting groove 312, and the end surface of the end of the blocking piece 22 away from the outer wall of the focusing tube 2 is movably abutted against the bottom wall of the limiting groove 312.

[0078] In this embodiment, if Figure 1 and Figure 4 As shown, by setting a limiting groove 312 on the optical coupling plate 311, the limiting groove 312 is used to ensure that the baffle 22 is always in contact with the optical coupling plate 311, ensuring accurate signal transmission between the transmitting end 314 and the receiving end 315 of the optical coupler 313 during the rotation of the baffle 22.

[0079] To further ensure the accuracy of position detection of the focusing barrel 2, in this embodiment, two baffles 22 are provided, spaced apart along the axial direction of the active cavity 21 on the outer wall of the focusing ring. Two optical couplers 313 are provided, each optical coupler 313 corresponding to a baffle 22. It will be appreciated that the two baffles 22 cooperate with the two optical couplers 313, respectively, to improve the accuracy of position detection of the focusing barrel 2. Thus, even if one optical coupler 313 fails, the other optical coupler 313 can still achieve accurate detection.

[0080] In another embodiment, the identification structure 3 includes a magnetic ring, a Hall sensor and a processing chip. The magnetic ring is arranged on the outer wall of the focusing tube 2, the Hall sensor is arranged opposite to the magnetic ring, and the processing chip is electrically connected to the Hall sensor. It is used to identify the displacement and moving direction of the focusing tube 2 according to the detection signal emitted by the Hall sensor, and issue a focusing instruction.

[0081] In this embodiment, by configuring the identification structure 3 as a Hall effect magnetic detection structure, a Hall effect sensor is utilized to detect changes in the magnetic properties of the magnetic ring as the focusing barrel 2 rotates, thereby accurately locating the focusing barrel 2. It will be appreciated that the magnetic ring, Hall effect sensor, and processing chip can be based on existing technologies and are not limited herein.

[0082] In one embodiment, a rack 24 is provided on the outer wall of the focusing tube 2, and the driving member 1 is provided with a driving gear 11, which is meshed with the rack 24; wherein the driving member 1 drives the driving gear 11 to rotate, so that the rack 24 drives the focusing tube 2 to rotate.

[0083] In this embodiment, if Figures 1 to 3 As shown, by setting the transmission structure between the focusing barrel 2 and the driving member 1 as a matching structure of the rack 24 and the driving gear 11, the driving member 1 can drive the focusing barrel 2 to rotate while minimizing the backlash caused by the matching between the focusing barrel 2 and the driving member 1.

[0084] It is understood that the driving member 1 can be a stepper motor, a drive motor, etc. A driving gear 11 is provided at the output end of the rotating shaft of the driving member 1, so that the driving gear 11 is meshed with the rack 24. In this way, when the driving member 1 drives the driving gear 11 to rotate, the rack 24 drives the focusing barrel 2 to rotate.

[0085] The present invention further provides a lens, which includes a lens barrel and the above-mentioned adjustment mechanism 100. The specific structure of the adjustment mechanism 100 refers to the aforementioned embodiment. Since this electronic device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0086] In this embodiment, the lens barrel is movably disposed within the movable chamber 21 of the adjustment mechanism 100. A guide protrusion is provided on the outer wall of the lens barrel, and the guide protrusion slides through the guide hole 23 of the focusing barrel 2. Optionally, the outer wall of the lens barrel is provided with multiple guide protrusions, and the multiple guide protrusions are provided in a one-to-one correspondence with the multiple guide holes 23.

[0087] It can be understood that the lens also includes components such as a housing and an optical machine. The housing has a mounting cavity and a light outlet connected to the mounting cavity. The adjustment mechanism 100 is arranged in the mounting cavity, and the focusing barrel 2 of the adjustment mechanism 100 is coaxially arranged with the light outlet. The lens barrel is movably arranged in the movable cavity 21 of the focusing barrel 2 and is arranged corresponding to the light outlet. The optical machine is connected to the lens barrel, which is not limited here.

[0088] The present invention also provides an electronic device including the aforementioned lens. The specific structure of the lens is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least possesses all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here.

[0089] It is understandable that the electronic device may be a projection device such as a projector, a camera or other device that requires a lens to achieve projection, light emission, etc., and is not limited here.

[0090] In this embodiment, when the lens in the electronic device needs to adjust the focal length, the driving member 1 drives the driving gear 11 to rotate, so that the rack 24 drives the focusing tube 2 to rotate, and the position of the baffle 22 changes with the rotation. The baffle 22 passes through the optical coupling detection member 31, so that the size of the light slit blocked by the baffle 22 on the optical coupler 313 of the optical coupling detection member 31 is used to confirm the position of the focusing tube 2. In this way, the backlash caused by the driving member 1 itself and the cooperation with the focusing tube 2 can be avoided, thereby achieving precise positioning of the current position of the focusing tube 2, so that the lens can achieve fast and accurate automatic focus.

[0091] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An adjustment mechanism, applied to a lens, characterized in that: The regulating mechanism comprises: driving parts; A focusing barrel, the focusing barrel being in driving connection with the driving member, the focusing barrel being provided with a movable cavity, the movable cavity being used to accommodate the lens barrel of the lens; and an identification structure, the identification structure being provided on the focusing barrel; the driving member driving the focusing barrel to rotate, the identification structure being used to identify and locate the position of the focusing barrel; The identification structure includes a baffle and an optical coupling detection member, wherein the baffle is provided on the outer wall of the focusing barrel and is provided with an identification hole. The optical coupling detection member is provided opposite to the focusing barrel and is provided with a detection slot, and the baffle is movably accommodated in the detection slot; the driving member drives the focusing barrel to drive the baffle to rotate, so that the baffle moves along the detection slot, and the detection slot identifies and locates the position of the focusing barrel by detecting the identification hole; The identification hole is extended in an arc shape with the center of the active cavity as the center, so that the identification hole has a first end and a second end; the size of the identification hole gradually decreases from the first end to the second end.

2. The adjustment mechanism according to claim 1, wherein: The focusing tube is further provided with a guide hole communicating with the movable cavity, and the guide hole extends spirally along the outer wall of the focusing tube; The arc length from the first end to the second end is defined as the length of the identification hole, and the length of the identification hole is greater than or equal to the extension length of the guide hole.

3. The adjustment mechanism according to claim 2, wherein: The angle formed by the first end, the second end and the center of the active cavity is less than or equal to 30°; And / or, the guide hole includes a plurality of guide holes, and the plurality of guide holes are arranged at intervals on the focusing barrel.

4. The adjustment mechanism according to claim 1, wherein: The optical coupling detection component includes an optical coupling plate and an optical coupler provided on the optical coupling plate. The optical coupler has a transmitting end and a receiving end that are relatively arranged. The transmitting end and the receiving end cooperate to form the detection slot.

5. The adjustment mechanism according to claim 4, wherein: The optical coupling plate is further provided with a limiting groove adjacent to the optical coupler, and the end of the blocking piece away from the outer wall of the focusing tube is movably accommodated in the limiting groove, and the end surface of the blocking piece away from the outer wall of the focusing tube is movably abutted against the bottom wall of the limiting groove; And / or, the identification structure further includes a processing chip, the processing chip is electrically connected to the optical coupler, the processing chip is used to identify the displacement and moving direction of the focusing barrel according to the detection signal emitted by the optical coupler, and issue a focusing instruction; And / or, the baffles include two, and the two baffles are spaced apart and arranged on the outer wall of the focusing barrel along the axial direction of the movable cavity; the optical couplers include two, and each optical coupler is arranged corresponding to one baffle.

6. The adjustment mechanism according to claim 1, wherein: The identification structure includes a magnetic ring, a Hall sensor and a processing chip. The magnetic ring is arranged on the outer wall of the focusing barrel, the Hall sensor is arranged opposite to the magnetic ring, and the processing chip is electrically connected to the Hall sensor, and is used to identify the displacement and moving direction of the focusing barrel according to the detection signal emitted by the Hall sensor, and issue a focusing instruction.

7. The adjustment mechanism according to any one of claims 1 to 6, characterized in that: The outer wall of the focusing cylinder is provided with a rack, and the driving member is provided with a driving gear, and the driving gear is meshed and connected with the rack; The driving member drives the driving gear to rotate, so that the rack drives the focusing barrel to rotate.

8. A lens, characterized in that: The lens comprises a lens barrel and an adjustment mechanism according to any one of claims 1 to 7, wherein the lens barrel is movably disposed in a movable cavity of the adjustment mechanism.

9. An electronic device, characterized in that: The electronic device includes the lens according to claim 8.

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