Adjusting mechanism, lens and electronic equipment

Abstract

The invention discloses an adjusting mechanism, a lens and electronic equipment, and relates to the technical field of lens focusing, the adjusting mechanism comprises a driving part, a focusing barrel and an identification structure, the focusing barrel is in transmission connection with the driving part, the focusing barrel is provided with a movable cavity, the movable cavity is used for accommodating a lens barrel of the lens, and the identification structure is used for identifying the lens barrel of the lens. The identification structure is arranged on the focusing cylinder; wherein the driving part drives the focusing cylinder to rotate, and the recognition structure is used for recognizing and positioning the position of the focusing cylinder. The invention aims to provide the adjusting mechanism for realizing rapid focusing, and the adjusting mechanism can realize rapid focusing when being applied to the lens and the electronic equipment, and can improve the focusing precision.

Description

Technical Field

[0001] The 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, more and more home projectors have entered people's field of vision, and are developing in the direction of miniaturization and portability. The portability of micro-projectors determines that the projection distance of projectors is often changed. In order to meet this application demand, the optical machine needs to be designed with zoom, and at the same time, the lens needs to drive the motor for electric focusing, so that the projection picture can be adjusted to a clear picture at different projection distances.

[0003] The current micro projector focusing solution on the market mainly uses stepper motors for focusing. During the focusing process, the motor is first returned to the starting point, and the distance between the lens and the screen is obtained according to the distance sensor. Then, the lens is moved to the pre-calibrated position by controlling the number of forward beats of the stepper motor. However, this method of controlling the number of stepper motor beats is an open-loop method, which cannot eliminate the influence of motor hysteresis and step loss caused by the tolerance of the transmission components and the difference of the motor itself. At the same time, it cannot feedback the current position of the lens, resulting in problems such as long focusing time 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 realizing fast focusing. The adjustment mechanism is applied to the lens and the electronic device to realize fast focusing and improve the focusing accuracy.

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

[0006] Driving parts;

[0007] A focusing barrel, the focusing barrel is drivingly connected to the driving member, the focusing barrel is provided with a movable cavity, and the movable cavity is used to accommodate the lens barrel of the lens; and

[0008] An identification structure, the identification structure is arranged on the focusing tube;

[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 arranged on the outer wall of the focusing tube, the baffle being provided with 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 tube to drive the blocking piece to rotate, so that the blocking piece moves along the detection groove, and the detection groove identifies and locates the position of the focusing tube 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 in a spiral shape 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 in the focusing tube.

[0020] In one embodiment, the optical coupling detection component includes an optical coupling plate and an optical coupler disposed on the optical coupling plate, the optical coupler has a transmitting end and a receiving end that are relatively disposed, 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 coupling, and one end of the blocking piece away from the outer wall of the focusing tube is movably accommodated in the limiting groove, and an end surface of one end of the blocking piece away from the outer wall of the focusing tube 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, and the processing chip is used to identify the displacement and moving direction of the focusing barrel according to the detection signal sent by the optical coupler, and issue a focusing instruction;

[0023] And / or, the baffles include two, the two baffles are spaced apart on the outer wall of the focusing ring along the axial direction of the movable cavity, and the optical couplers include two, each of the optical couplers 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 tube, and the driving member is provided with a driving gear, and the driving gear is meshedly connected with the rack;

[0026] Wherein, 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 above-mentioned adjustment mechanism, wherein the lens barrel is movably disposed in a movable cavity of the adjustment mechanism.

[0028] The present invention further provides an electronic device, comprising the lens described above.

[0029] The adjustment mechanism of the technical solution of the present invention connects the focusing barrel with the driving member through transmission, and provides a movable cavity for accommodating the lens barrel of the lens on 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, an identification structure is provided on the focusing barrel, so that when the driving member drives the focusing barrel to rotate, the position of the focusing barrel can be identified and located in real time by the identification structure, which can avoid the backlash caused by the driving member itself and the cooperation with the focusing ring, thereby realizing accurate 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0031] Figure 1 A schematic structural diagram of an embodiment of an adjusting 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 schematic structural diagram of an embodiment of an 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. Optical coupling detection member; 311. Optical coupling plate; 312. Limiting groove; 313. Optical coupling; 314. Transmitting end; 315. Receiving end; 316. Detection groove.

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

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 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 a option in which both A and B are satisfied.

[0041] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot 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 the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a 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, more and more home projectors have entered people's field of vision, and are developing in the direction of miniaturization and portability. The portability of micro-projectors determines that the projection distance of projectors is often changed. In order to meet this application demand, the optical machine needs to be designed with zoom, and at the same time, the lens needs to drive the motor for electric focusing, so that the projection picture can be adjusted to a clear picture at different projection distances.

[0043] The current micro projector focusing solution on the market mainly uses stepper motors for focusing. During the focusing process, the motor is first returned to the starting point, and the distance between the lens and the screen is obtained according to the distance sensor. Then, the lens is moved to the pre-calibrated position by controlling the number of forward beats of the stepper motor. However, this method of controlling the number of stepper motor beats is an open-loop method, which cannot eliminate the influence of motor hysteresis and step loss caused by the tolerance of the transmission components and the difference of the motor itself. At the same time, it cannot feedback the current position of the lens, resulting in problems such as long focusing time and poor accuracy.

[0044] Based on the above ideas and problems, the present invention proposes an adjustment mechanism 100. It can be understood that the adjustment mechanism 100 is applied to a lens, so that the lens focal length can be adjusted through the adjustment mechanism 100, so that the lens focus is adjusted to a clear picture. In this embodiment, the lens can be applied to electronic devices, such as projection devices such as projectors, cameras, or other devices that need to use lenses to achieve projection, light emission, etc., which are not limited here.

[0045] It can be understood that the lens includes a lens barrel, an optical machine and an adjustment mechanism 100, the lens barrel is movably arranged in the movable cavity 21 of the adjustment mechanism 100, and the lens barrel is moved in the movable cavity 21 by the adjustment mechanism 100, so as to achieve the focusing of the lens, and the optical machine is connected to the lens barrel, and is used to realize light emission or output of images 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 machine, the lens barrel, and the 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 an active cavity 21. The active 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 electric motor, a servo motor or other structures that can drive the focusing tube 2 to rotate, which is not limited here.

[0048] In order to facilitate the processing, installation or maintenance of the focusing tube 2, the focusing tube 2 is connected to the driving member 1 through a transmission structure, that is, the focusing tube 2 is connected to the output end of the driving member 1 through a transmission structure. It can be understood that the focusing tube 2 can be connected to the output end of the driving member 1 through a gear structure, a chain, a transmission rod or other transmission structures, which are not limited here.

[0049] In order to facilitate the use of the focusing barrel 2 to adjust the focal length of the lens, in this embodiment, the focusing barrel 2 is provided with an active cavity 21 for accommodating the lens barrel of the lens. It can be understood that in order to achieve focusing, when the focusing barrel 2 is driven to rotate by the driving member 1, the lens barrel of the lens can move along the axial direction of the active cavity 21 of the focusing barrel 2, that is, by converting the rotation of the focusing barrel 2 around the central axis of the active cavity 21 into a linear movement of the lens barrel along the extension direction of the central axis of the active 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. 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 accurate 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 identification structure 3 realizes the identification and positioning of the displacement and moving direction of the focus barrel 2 during the rotation process, so as to issue a focusing instruction according to the detected displacement and moving direction of the focus barrel 2. It can be understood that the identification structure 3 can be a laser detection structure, a Hall electromagnetic structure or other structure capable of identifying and detecting the displacement and moving direction of the focus barrel 2, which is not limited here.

[0053] The adjustment mechanism 100 of the present invention achieves focusing of the lens by connecting the focusing barrel 2 with the driving member 1 in a transmission manner, and providing the focusing barrel 2 with an active cavity 21 for accommodating the lens barrel, thereby utilizing the driving member 1 to drive the focusing barrel 2 to rotate; at the same time, by providing an identification structure 3 on the focusing barrel 2, in the process of the driving member 1 driving the focusing barrel 2 to rotate, the position of the focusing barrel 2 can be identified and located in real time by the identification structure 3, and the backlash caused by the driving member 1 itself and the cooperation with the focusing barrel 2 can be avoided, thereby achieving accurate 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 tube 2, the baffle 22 is provided with an identification hole 221, the optical coupling detection member 31 is arranged opposite to the focusing tube 2, the optical coupling detection member 31 is provided with a detection groove 316, and the baffle 22 is movably accommodated in the detection groove 316; wherein, the driving member 1 drives the focusing tube 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 tube 2 by detecting the identification hole 221.

[0055] In this embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, by setting the identification structure 3 as the baffle 22 and the optical coupling detection member 31, the optical coupling detection member 31 cooperates with the baffle 22 to realize the identification and positioning of the position of the focusing barrel 2 during the rotation process. 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 setting 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 integrally formed structure, which is not limited here. Of course, the baffle 22 can also be detachably mounted on the outer wall of the focusing barrel 2, so that the baffle 22 and the focusing barrel 2 are relatively fixed, for example, by snap connection, plug-in fit, screw connection or pin connection, etc., which is not limited here. Optionally, the baffle 22 and the focusing barrel 2 are an integrally formed structure.

[0058] It should be noted that, in order to facilitate the rotation or rotation of the focusing barrel 2 under the drive of the driving member 1, the focusing barrel 2 can be selected as a cylindrical structure. Optionally, the focusing barrel 2 is a cylindrical structure, which is not limited here. In this embodiment, the baffle 22 rotates with the rotation of the focusing barrel 2, that is, the baffle 22 rotates synchronously with the focusing barrel 2. When the baffle 22 rotates, it moves relative to the optical coupling detection member 31.

[0059] Optionally, the baffle 22 is an arc-shaped plate-like structure extending along the circumference of the outer wall of the focus tube 2. In this embodiment, the end surface of the baffle 22 on one side away from the outer wall of the focus tube 2 is an arc surface. In this way, when the driving member 1 drives the focus tube 2 to drive the baffle 22 to rotate, the baffle 22 moves along the detection groove 316, so that the detection groove 316 identifies the position of the focus tube 2 through the detection identification 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 may be an arc-shaped hole structure. Optionally, the identification hole 221 is arranged to extend in an arc-shaped hole with the intersection of the central axis of the active cavity 21 and the plane where the baffle 22 is located as the center. It can be understood that the identification hole 221 passes through the baffle 22, so that the optical coupling detection member 31 can be conveniently detected and identified through the identification hole 221.

[0062] It can be understood that the identification hole 221 extends from the first end 222 to the second end 223. In this embodiment, the size of the identification hole 221 can be gradually reduced from the first end 222 to the second end 223. This configuration allows the optical coupling detection member 31 to identify and locate the rotation position of the focusing barrel 2 through 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 opposite to each other, and both the first inner wall and the second inner wall extend from the first end 222 to the second end 223, and the first inner wall is adjacent to the outer wall of the focusing barrel 2. Optionally, the distance between the first inner wall of the identification hole 221 and the outer wall of the focusing barrel 2 is the same from the first end 222 to the second end 223. It can be understood 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 set to 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 can gradually decrease 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 in a spiral shape 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 is extended in a spiral shape along the outer wall of the focusing barrel 2. In this way, when the lens barrel of the lens is installed in the active cavity 21, the protrusion or guide block of the lens barrel is penetrated into 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 can be understood that the guide hole 23 extends in a spiral along the outer wall of the focusing tube 2 to form a first end and a second end, and the projections of the first end and the second end on the central axis of the active cavity 21 are arranged at intervals along the axial direction of the central axis of the active cavity 21. In this embodiment, the first end and the second end of the guide hole 23 limit the movement of the projection or the guide block of the lens barrel, that is, when the projection or the guide block moves from the first end of the guide hole 23 to the second end, the moving distance of the lens barrel in the active cavity 21 is the distance between the projections of the first end and the second end on the central axis of the active cavity 21, which is not limited here.

[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. It can be understood that this can ensure effective detection of the optical coupling detection member 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 stability of the movement of the lens barrel in the active cavity 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 disposed on the optical coupling plate 311 . The optical coupler 313 has a transmitting end 314 and a receiving end 315 that are disposed opposite to each other. 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 member 31 can be a substrate or a circuit board. The optical coupling plate 311 is opposite to the outer wall of the focusing barrel 2. When the driving member 1 drives the focusing barrel 2 to rotate, the optical coupling detection member 31 will not rotate with the focusing barrel 2. It can be understood that the optical coupling plate 311 of the optical coupling detection member 31 can be fixed in 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 relatively to 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 the 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 the receiving end 315 of the optical coupler 313 are respectively located on opposite sides of the baffle 22. Since the size of the identification hole 221 gradually decreases from the first end 222 to the second end 223, that is, when the driver 1 drives the focusing barrel 2 to drive the baffle 22 to rotate, the transmitting end 314 of the optical coupler 313 emits light or signals from the first end 222 to the second end 223 and 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 will gradually change, 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 giving the focusing barrel 2 an identification that can be identified by the optical coupler. It can be understood that by identifying the position of the focusing barrel 2 in this way, the hysteresis caused by the driver 1 itself and the cooperation between the driver 1 and the focusing barrel 2 can be avoided, the current focusing position can be accurately located, and fast and accurate automatic focusing can be achieved.

[0076] In order to further achieve fast focusing, in one embodiment, the identification structure 3 further includes a processing chip, which is electrically connected to the optical coupler 313, and the processing chip is used to identify the displacement and movement direction of the focusing barrel 2 according to the detection signal sent by the optical coupler 313, and to issue a focusing instruction. It can be understood that the processing chip is used to process the detection signal of the optical coupler detection element 31, and form a focusing signal or instruction through the detection signal, which is not limited here.

[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 baffle 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 baffle 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] In order to further ensure the accuracy of the position detection of the focus barrel 2, in this embodiment, there are two baffles 22, which are arranged at intervals on the outer wall of the focus ring along the axial direction of the active cavity 21, and there are two optical couplers 313, each optical coupler 313 is arranged corresponding to one baffle 22. It can be understood that the accuracy of the position detection of the focus barrel 2 is improved by the two baffles 22 respectively cooperating with the two optical couplers 313, so that when one optical coupler 313 fails, the other optical coupler 313 can also 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 and the magnetic ring are arranged opposite to each other, and the processing chip is electrically connected to the Hall sensor for identifying the displacement and moving direction of the focusing tube 2 according to the detection signal emitted by the Hall sensor, and issuing a focusing instruction.

[0081] In this embodiment, by setting the identification structure 3 as a Hall magnetic detection structure, the Hall sensor is used to detect the magnetic change of the magnetic ring when the focusing tube 2 rotates, so as to accurately locate the position of the focusing tube 2. It can be understood that the magnetic ring, the Hall sensor and the processing chip can refer to the existing technology and are not limited here.

[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 meshedly connected 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 tube 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 tube 2 to rotate while minimizing the backlash caused by the matching between the focusing tube 2 and the driving member 1.

[0084] It is understandable that the driving member 1 can be selected as a stepper motor, a driving motor, etc. A driving gear 11 is arranged at the output end of the rotating shaft of the driving member 1, so that the driving gear 11 is meshed and connected with the rack 24, so that 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 proposes 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 the electronic device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought 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 arranged in the movable cavity 21 of the adjustment mechanism 100. The outer wall of the lens barrel is provided with a guide protrusion, 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 a plurality of guide protrusions, and the plurality of guide protrusions are arranged one by one with the plurality of guide holes 23.

[0087] It can be understood that the lens also includes components such as a shell and an optical machine. The shell 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, which includes the above-mentioned lens. The specific structure of the lens refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it 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.

[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 position of the focusing tube 2 is confirmed by the size of the light slit blocked by the baffle 22 on the optical coupling 313 of the optical coupling detection member 31. In this way, the backlash caused by the driving member 1 itself and the cooperation with the focusing tube 2 can be avoided, thereby realizing the precise positioning of the current position of the focusing tube 2, so that the lens can achieve fast and accurate automatic focusing.

[0091] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied 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 is drivingly connected to the driving member, the focusing barrel is provided with a movable cavity, and the movable cavity is used to accommodate the lens barrel of the lens; and An identification structure, the identification structure is arranged on the focusing tube; 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.

2. The adjustment mechanism according to claim 1, characterized in that: The identification structure comprises: A baffle, the baffle being arranged on the outer wall of the focusing tube, the baffle being provided with an identification hole; and 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; The driving member drives the focusing tube to drive the blocking piece to rotate, so that the blocking piece moves along the detection groove, and the detection groove identifies and locates the position of the focusing tube by detecting the identification hole.

3. The adjustment mechanism according to claim 2, characterized in that: 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; Wherein, the size of the identification hole gradually decreases from the first end to the second end.

4. The adjustment mechanism according to claim 3, characterized in that: The focusing tube is also provided with a guide hole connected to the movable cavity, and the guide hole extends in a spiral shape 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.

5. The adjustment mechanism according to claim 4, characterized in that: 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 in the focusing tube.

6. The adjustment mechanism according to claim 2, characterized in that: The optical coupling detection component includes an optical coupling plate and an optical coupler arranged on the optical coupling plate. The optical coupler has a transmitting end and a receiving end that are arranged opposite to each other. The transmitting end and the receiving end cooperate to form the detection slot.

7. The adjustment mechanism according to claim 6, characterized in that: The optical coupling plate is further provided with a limiting groove adjacent to the optical coupling, and one 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 end 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, and the processing chip is used to identify the displacement and moving direction of the focusing barrel according to the detection signal sent by the optical coupler, and issue a focusing instruction; And / or, the baffles include two, the two baffles are spaced apart on the outer wall of the focusing ring along the axial direction of the movable cavity, and the optical couplers include two, each of the optical couplers is arranged corresponding to one baffle.

8. The adjustment mechanism according to claim 1, characterized in that: 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 tube, 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 tube according to the detection signal emitted by the Hall sensor, and issuing a focusing instruction.

9. The adjustment mechanism according to any one of claims 1 to 8, characterized in that: The outer wall of the focusing tube 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; Wherein, the driving member drives the driving gear to rotate, so that the rack drives the focusing barrel to rotate.

10. A lens, characterized in that: The lens comprises a lens barrel and an adjustment mechanism as claimed in any one of claims 1 to 9, and the lens barrel is movably disposed in a movable cavity of the adjustment mechanism.

11. An electronic device, characterized in that: The electronic device comprises the lens as claimed in claim 10.

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