阅读说明：本技术 自动调焦设备 (Automatic focusing apparatus ) 是由 黄巧 剧浩然 庄孟雨 程序贤 于 2018-08-15 设计创作，主要内容包括：本发明公开了一种自动调焦设备,涉及镜头模组生产检测技术领域。本发明包括第一升降装置和固定在其上的调焦悬臂,调焦悬臂包括悬臂承重件、若干复位夹爪、旋转支撑机构和拉轴升降机构,旋转支撑机构设置在悬臂承重件底部,拉轴升降机构固定在悬臂承重件顶部,拉轴升降机构一端顺次穿过悬臂承重件和旋转支撑机构并设置有旋转体；若干复位夹爪以相对于旋转体轴线中心对称的方式连接在旋转支撑机构上,以使旋转支撑机构带动若干复位夹爪绕旋转体轴线转动；若干复位夹爪均具有与旋转体压接的顶撑部,以使若干复位夹爪随拉轴升降机构的升降而开合。本发明的复位夹爪同步性高,平行度误差小,为调焦精度提供有效保障。(The invention discloses automatic focusing equipment, and relates to the technical field of lens module production detection. The focusing cantilever comprises a cantilever bearing part, a plurality of reset clamping jaws, a rotary supporting mechanism and a pull shaft lifting mechanism, wherein the rotary supporting mechanism is arranged at the bottom of the cantilever bearing part; the plurality of reset clamping jaws are connected to the rotary supporting mechanism in a manner of being centrosymmetric relative to the axis of the rotating body, so that the rotary supporting mechanism drives the plurality of reset clamping jaws to rotate around the axis of the rotating body; the reset clamping jaws are provided with jacking parts which are in compression joint with the rotating body, so that the reset clamping jaws can be opened and closed along with the lifting of the pull shaft lifting mechanism. The reset clamping jaw provided by the invention has high synchronism and small parallelism error, and provides an effective guarantee for focusing precision.)

1. The automatic focusing equipment comprises a first lifting device (100) and a focusing cantilever fixed on the first lifting device, and is characterized in that the focusing cantilever comprises a cantilever bearing piece (200), a plurality of reset clamping jaws (300), a rotary supporting mechanism (400) and a pull shaft lifting mechanism (500), wherein the rotary supporting mechanism (400) is arranged at the bottom of the cantilever bearing piece (200), the pull shaft lifting mechanism (500) is fixed at the top of the cantilever bearing piece (200), and one end of the pull shaft lifting mechanism (500) sequentially penetrates through the cantilever bearing piece (200) and the rotary supporting mechanism (400) and is provided with a rotating body (510); the plurality of reset clamping jaws (300) are connected to the rotary supporting mechanism (400) in a manner of being centrosymmetric relative to the axis of the rotating body (510), so that the rotary supporting mechanism (400) drives the plurality of reset clamping jaws (300) to rotate around the axis of the rotating body (510); the reset clamping jaws (300) are provided with supporting parts (320) which are in compression joint with the rotating body (510), so that the reset clamping jaws (300) can be opened and closed along with the lifting of the pull shaft lifting mechanism (500).

2. The autofocus apparatus according to claim 1, wherein the supporting portion (320) has a supporting surface that is pressed against the rotating body (510), the supporting surface being a flat surface or an arc surface; a distance difference is arranged between the vertical distances from any two points on the axis of the rotating body (510) to the top bracing surface; the reset clamping jaws are opened and closed along the radial direction of the rotating body.

3. The autofocus apparatus according to claim 2, wherein the rotating body (510) is a cone, and a universal ball (350) is movably embedded in the top support surface of the top support portion (320), and the universal ball (350) is in pressure contact with the rotating body (510).

4. An autofocus apparatus according to claims 1 to 3, wherein the pull shaft elevating mechanism (500) comprises a pull shaft (520) and a second elevating device (530), the second elevating device (530) is fixed to the top of the cantilever support member (200), one end of the pull shaft (520) is fixedly connected to the second elevating device (530), the other end of the pull shaft (520) passes through the cantilever support member (200) and the rotation support mechanism (400) in sequence and is provided with a rotating body (510), and the moving direction of the rotating body (510) is the same as the axial extension direction thereof.

5. The autofocus apparatus according to claim 4, wherein the second elevating device (530) includes a slide cylinder (531) and a pull plate assembly (532), the slide cylinder (531) is fixed to the top of the cantilever support member (200), and the pull plate assembly (532) is disposed between the slide cylinder (531) and the pull shaft (520) to drive the pull shaft (520) to reciprocate along the axial extension direction of the rotating body (510).

6. The autofocus apparatus according to claims 1 to 3, wherein the reset jaw (300) includes a copying jaw (310) and a plurality of spring telescopic shafts (340), the plurality of spring telescopic shafts (340) being fixed in parallel to each other between the reset jaw (300) and the rotary support mechanism (400) to reciprocate the reset jaw (300) in a radial direction of the rotary body (510); one side of the profiling clamping jaw (310) adjacent to the rotating body (510) is provided with a clamping part (330) and a top supporting part (320), the top supporting part (320) is wedge-shaped, and the top supporting surface of the top supporting part (320) corresponding to the rotating body (510) is an inclined surface.

7. The autofocus apparatus of claims 1 to 3, wherein the rotary support mechanism (400) comprises a second pulley assembly (410), a rotary fixing plate (420), and a plurality of clamping jaw fixing plates (430), the second pulley assembly (410) is movably connected to the bottom of the cantilever bearing member (200), the top of the rotary fixing plate (420) is fixedly connected to the second pulley assembly (410), the plurality of clamping jaw fixing plates (430) are fixed to the bottom of the rotary fixing plate (420) in a centrosymmetric manner, and the plurality of reset clamping jaws (300) are respectively fixed to the corresponding clamping jaw fixing plates (430).

8. The autofocus apparatus of claims 1 to 3, wherein the first lifting device (100) comprises a fixed base (110), a first pulley transmission assembly (120), a ball screw assembly (130), and a linear guide (140), the first pulley transmission assembly (120) is disposed on the top or bottom of the fixed base (110), the linear guide (140) is engaged with the ball screw assembly (130) and vertically fixed on the fixed base (110), the linear guide is vertically fixed on both ends of the ball screw assembly (130) and fixed on the fixed base (110) through bearings, one end of the ball screw assembly (130) passes through the fixed base (110) and is fixedly connected with the first pulley transmission assembly (120), the cantilever load-bearing member (200) is fixedly connected with the ball screw assembly (130) and slidably engaged with the linear guide (140), so that the cantilever load-bearing member (200) is driven by the ball screw assembly (130) along the linear guide (140) And (4) reciprocating and lifting.

9. An autofocus apparatus according to claims 1 to 3, wherein the cantilever support (200) is further provided with a sensor (600) at the bottom, the sensor (600) being aligned with the plurality of reset jaws (300).

Technical Field

The invention relates to the technical field of lens module production testing, in particular to automatic focusing equipment.

Background

The security camera is an important component forming a security system. The existing security camera generally adopts a lens module consisting of a lens with a fixed focal length and an imaging circuit board. During the production and assembly process of the lens module, the lens module needs to be focused first, i.e. the focusing device is used to finely adjust the distance between the lens of the lens module and the photosensitive element, so that the focusing surface of the lens is aligned with the sensing surface of the photosensitive element, thereby achieving the best imaging quality.

The working modes of the focusing production line are generally divided into two types: manual focusing and mechanical automatic focusing. Manual focusing requires an operator to hold a lens to align with a focusing plate, and focusing work is completed by observing with naked eyes and repeatedly screwing a fine-tuning lens, so that the manual focusing is time-consuming and labor-consuming, the difference rate of finished products is high, and the imaging quality of subsequent use of the lens is seriously influenced. The mechanical automatic focusing needs to be realized by means of an automatic focusing device, the existing automatic focusing device adopts a spring, a linear bearing, four groups of small single-action cylinders, a profiling clamping jaw, a synchronous belt transmission mechanism, a stepping motor, a deep groove ball bearing and the like to realize clamping, loosening and rotary focusing of a lens, but because the four groups of small single-action cylinders are used, the lens module is clamped and deflected due to the fact that the four groups of small single-action cylinders cannot be controlled to act simultaneously, and focusing precision is influenced. In addition, the fixed rotary clamping device of the deep groove ball bearing can not ensure the parallelism of the copying clamping jaw due to the bearing clearance, thereby influencing the focusing precision.

Disclosure of Invention

The invention aims to: the automatic focusing device is used for solving the problems that manual focusing efficiency is low, yield is low, and the focusing precision of a lens module is low due to poor synchronization of clamping jaws and large parallelism error of the conventional automatic focusing device. The automatic focusing equipment shortens the time of single focusing operation to within 15s, has small parallelism error of the clamping jaws, greatly improves the synchronism of the clamping jaws, and provides guarantee for the precision requirement of automatic focusing.

The technical scheme adopted by the invention is as follows: the automatic focusing equipment comprises a first lifting device and a focusing cantilever fixed on the first lifting device, wherein the focusing cantilever comprises a cantilever bearing piece, a plurality of reset clamping jaws, a rotary supporting mechanism and a pull shaft lifting mechanism, the rotary supporting mechanism is arranged at the bottom of the cantilever bearing piece, the pull shaft lifting mechanism is fixed at the top of the cantilever bearing piece, and one end of the pull shaft lifting mechanism sequentially penetrates through the cantilever bearing piece and the rotary supporting mechanism and is provided with a rotating body; the plurality of reset clamping jaws are connected to the rotary supporting mechanism in a manner of being centrosymmetric relative to the axis of the rotating body, so that the rotary supporting mechanism drives the plurality of reset clamping jaws to rotate around the axis of the rotating body; the reset clamping jaws are provided with jacking parts which are in compression joint with the rotating body, so that the reset clamping jaws can be opened and closed along with the lifting of the pull shaft lifting mechanism.

Due to the arrangement, the plurality of reset clamping jaws connected to the rotary supporting mechanism are passively opened and actively clamped in the lifting process of the rotary body, the opening and closing of the reset clamping jaws are controlled by a single factor, and the synchronism is high. Secondly, because the reset clamping jaw is relatively fixed on the rotary supporting mechanism, the translational motion of the reset clamping jaw is not influenced by the clearance or error of parts such as a bearing and the like, and effective guarantee is provided for improving the parallelism of the clamping jaw.

Furthermore, the top supporting part is provided with a top supporting surface which is in pressure joint with the rotating body, the top supporting surface is a plane or a cambered surface, and a distance difference is arranged between the vertical distance from any two points on the axis of the rotating body to the top supporting surface.

Due to the arrangement, the vertical distances from any two points on the axis of the rotating body to the top supporting surface are different, so that the vertical distance from any one point on the axis of the rotating body to the top supporting part is gradually increased or decreased in the lifting process of the rotating body, and the smooth opening and closing of the reset clamping jaw are guaranteed.

Furthermore, the rotating body is a cone, universal balls are movably embedded in the top supporting face of the top supporting portion, and the universal balls are in pressure connection with the rotating body.

Due to the arrangement, the rotating body is a cone, and the jacking surface is a plane in line contact with the cone or an arc surface in surface contact with the cone, so that the jacking portion can be in smoother contact with the rotating body. On the premise that the rotating body is lifted at a constant speed, the opening and closing speed of the reset clamping jaw is in a linear change trend, and the controllability is stronger. Further the universal ball is set up in the activity inlays in the jacking portion for the rotator is the rolling cooperation with universal ball pressure joint contact all the time, reduces the wearing and tearing of rotator and jacking portion, the removal precision of the clamping jaw that resets of guarantee.

Further, the pull shaft lifting mechanism comprises a pull shaft and a second lifting device, the second lifting device is fixed to the top of the cantilever bearing part, one end of the pull shaft is fixedly connected with the second lifting device, the other end of the pull shaft sequentially penetrates through the cantilever bearing part and the rotary supporting mechanism and is provided with a rotary body, and the moving direction of the rotary body is the same as the extending direction of the axis of the rotary body. The moving direction of the rotating body is the same as the extending direction of the axis of the rotating body, so that the pressing positions of the top supporting part of each reset clamping jaw and the rotating body are the same at the same time, the translation distances of the reset clamping jaws which are squeezed by the rotating body are also the same, and the reset clamping jaws are always in a state of being centrosymmetric relative to the axis of the rotating body and keep high synchronization in the opening and closing processes.

Further, second elevating gear includes slip table cylinder and arm-tie subassembly, and the slip table cylinder is fixed at cantilever bearing part top, and the arm-tie subassembly sets up between slip table cylinder and pull shaft to drive the pull shaft along rotator axis extending direction reciprocating motion. The mechanical positioning precision and the repetition precision of the sliding table cylinder are high, the sliding table cylinder is easy to control, and the automatic focusing precision can be guaranteed.

Furthermore, the reset clamping jaw comprises a profiling clamping jaw and a plurality of spring telescopic shafts, and the spring telescopic shafts are mutually fixed between the reset clamping jaw and the rotary supporting mechanism in parallel so as to ensure that the reset clamping jaw reciprocates along the radial direction of the rotating body; one side of the profiling clamping jaw, which is adjacent to the rotating body, is provided with a clamping part and a jacking part, the jacking part is wedge-shaped, and the jacking surface of the jacking part, which corresponds to the rotating body, is an inclined surface.

Due to the arrangement, the profiling clamping jaws are fixed on the clamping jaw fixing plate through the spring telescopic shafts, the spring telescopic shafts which are parallel to each other are compressed and actively stretched, so that the profiling clamping jaws can reciprocate along the axial direction of the rotating body, and the parallelism of the profiling clamping jaws is high.

Further, the rotary supporting mechanism comprises a second belt wheel transmission assembly, a rotary fixing plate and a plurality of clamping jaw fixing plates, the second belt wheel transmission assembly is movably connected to the bottom of the cantilever bearing part through a bearing, the top of the rotary fixing plate is fixedly connected with the second belt wheel transmission assembly, the clamping jaw fixing plates are fixed to the bottom of the rotary fixing plate in a centrosymmetric mode, and the plurality of reset clamping jaws are fixed to the corresponding clamping jaw fixing plates respectively.

Due to the arrangement, the rotary motion and the translational motion of the reset clamping jaw are controlled and adjusted by the second belt wheel transmission assembly and the second lifting device respectively, are not interfered with each other, and are convenient for programming control and automatic operation.

Further, first elevating gear includes unable adjustment base, first band pulley transmission assembly, ball screw subassembly and linear guide, first band pulley transmission assembly sets up at unable adjustment base top or bottom, linear guide and ball screw subassembly cooperation and vertical the fixing on unable adjustment base, vertical the fixing is fixed on unable adjustment base through the bearing at ball screw subassembly both ends, ball screw subassembly one end is passed unable adjustment base and first band pulley transmission assembly fixed connection, cantilever bearing spare and ball screw subassembly fixed connection and with linear guide sliding fit, so that cantilever bearing spare is along linear guide reciprocating lift under ball screw subassembly's drive.

Due to the arrangement, the focusing cantilever is lifted along the linear guide rail along with the movement of the ball screw assembly under the control of the first belt wheel transmission assembly, the mechanical strength and the positioning precision are high, and the programming control and the automatic operation are facilitated.

Furthermore, a sensor is arranged at the bottom of the cantilever bearing part and is aligned to the plurality of reset clamping jaws.

Due to the arrangement, the sensor arranged at the bottom of the cantilever bearing part is used for detecting the distance between the reset clamping jaw and the lens module, when the first lifting device drives the focusing cantilever to descend and the reset clamping jaw moves to the position above the lens module and is a first preset distance, the control system can control the second lifting device to drive the rotating body to lift according to a signal fed back by the sensor, so that the reset clamping jaw is in an open state; the first lifting device further drives the focusing cantilever to descend, and when the reset clamping jaw moves to a second preset distance from the lens module, the control system can control the second lifting device to drive the rotating body to lift according to signals fed back by the sensor, so that the reset clamping jaw is in a clamping state. The setting is convenient for programming control and automatic operation, and effectively reduces the influence of manual operation on focusing precision.

In conclusion, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. due to the arrangement, the plurality of reset clamping jaws connected to the rotary supporting mechanism are passively opened and actively clamped in the lifting process of the rotary body, the opening and closing of the reset clamping jaws are controlled by a single factor, and the synchronism is high. Secondly, as the reset clamping jaw is relatively fixed on the rotary supporting mechanism, the translational motion of the reset clamping jaw is not influenced by the clearance or error of parts such as a bearing and the like, thereby providing effective guarantee for improving the parallelism of the clamping jaw;

2. the vertical distances from any two points on the axis of the rotating body to the top support surface are different, so that the vertical distance from any one point on the axis of the rotating body to the top support part gradually increases or decreases in the lifting process of the rotating body, and smooth opening and closing of the reset clamping jaws are guaranteed;

3. the rotator is a cone, and the top supporting surface is a plane in line contact with the cone or an arc surface in surface contact with the cone, so that the top supporting part can be in smoother contact with the rotator. On the premise that the rotating body is lifted at a constant speed, the opening and closing speed of the reset clamping jaw is in a linear change trend, and the controllability is stronger. Furthermore, a universal ball is movably embedded in the top bracing surface, so that the rotating body is always in pressure contact with the universal ball, sliding fit is changed into rolling fit, abrasion of the rotating body and the top bracing portion is reduced, and the moving precision of the reset clamping jaw is guaranteed;

4. the moving direction of the rotating body is the same as the extending direction of the axis of the rotating body, so that the compression joint position of the top supporting part of each reset clamping jaw and the rotating body is the same at the same time, the translation distance of each reset clamping jaw extruded by the rotating body is also the same, and each reset clamping jaw always keeps a state of being symmetrical relative to the center of the axis of the rotating body and keeps high synchronization in the opening and closing process;

5. the profiling clamping jaws are fixed on the clamping jaw fixing plate through spring telescopic shafts, the mutually parallel spring telescopic shafts are compressed and actively stretched under pressure, so that the profiling clamping jaws can perform axial reciprocating motion of the rotating body, and the parallelism of the profiling clamping jaws is high;

6. the rotary motion and the translational motion of the reset clamping jaw are respectively controlled and adjusted by the second belt wheel transmission assembly and the second lifting device, so that the rotation and the translational motion of the reset clamping jaw are not interfered with each other, the motion precision is high, and the programming control and the automatic operation are facilitated;

7. the focusing cantilever is lifted and lowered under the matching of the first belt wheel transmission assembly, the ball screw assembly and the linear guide rail, the mechanical strength and the positioning accuracy are high, and the programming control and the automatic operation are facilitated;

8. the sensor that cantilever bearing piece bottom set up is used for surveying the distance of clamping jaw and lens module that resets, provides the guarantee for the automation mechanized operation of automatic focusing equipment, and the programming control of being convenient for effectively reduces manual operation to the influence of focusing precision.

Drawings

FIG. 1 is a schematic view of an autofocus apparatus of the present invention;

FIG. 2 is a schematic view of the construction of the focusing suspension of the present invention;

FIG. 3 is a schematic view of the reset jaw of the focusing suspension arm of the present invention in a clamped state;

FIG. 4 is a schematic structural view of a reset jaw of the focusing cantilever of the present invention in an open state;

the labels in the figure are: 100-a first lifting device; 200-cantilever load bearing member; 300-resetting the clamping jaw; 400-a rotation support mechanism; 500-a pull shaft lifting mechanism; 600-a sensor; 700-lens module; 800-fixing the tool; 110-a stationary base; 120-a first pulley transmission assembly; 121-driven pulley a; 122-drive pulley a; 123-drive belt A; 124-drive motor A; 130-a ball screw assembly; 140-linear guide rail; 310-a contoured jaw; 320-a top support part; 330-a clamping part; 340-spring telescopic shaft; 350-universal ball; 410-a second pulley drive assembly; 411-driven pulley B; 412-drive pulley B; 413-drive belt B; 414-drive motor B; 420-rotating the fixed plate; 430-a jaw securing plate; 510-a rotator; 520-pulling the shaft; 530-a second lifting device; 531-slipway cylinder; 532-pulling plate assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.