A composite adjusting device applied to a photographic lens

Abstract

The utility model provides a kind of compound adjusting device applied to photographic lens, it is related to photographic lens technical field, lens includes fixed lens barrel and optical lens barrel group, compound adjusting device includes manual focusing adjusting mechanism, automatic focusing mechanism, manual aperture adjusting mechanism, automatic aperture mechanism, main circuit board and guide rod group, the utility model can solve the problem of insufficient precision of traditional lens single adjustment mode and poor operation feedback, while maintaining electric control precision, improve manual control experience, especially suitable for professional photography and video shooting field.

Description

Technical Field

[0001] This utility model relates to the field of photographic lens technology, and in particular to a composite adjustment device applied to photographic lenses. Background Technology

[0002] The lens's core functions are focus control and aperture adjustment, which are mainly achieved through manual adjustment or automatic control.

[0003] Currently, manual adjustment allows users to directly operate the mechanism on the lens to adjust the focus and aperture size in real time. However, inconsistencies in assembly precision and adjustment force may lead to insufficient adjustment accuracy of the lens. On the other hand, automatic adjustment, through motors and electronic preset programs, enables the lens to automatically adjust the angle according to the sharpness of the image and automatically control the aperture size according to shooting needs. However, complex shooting environments may cause automatic adjustment to fail, thus affecting the user experience.

[0004] Therefore, existing methods for focusing and adjusting the aperture of a lens cannot simultaneously achieve both high precision and automatic adjustment. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a composite adjustment device for photographic lenses, so as to solve the technical problem that the focusing and aperture adjustment methods of lenses in the background art cannot simultaneously achieve high precision and automatic adjustment functions.

[0006] The present invention provides a composite adjustment device for a photographic lens, the lens comprising a fixed lens barrel and an optical lens barrel assembly, and the composite adjustment device comprising a manual focus adjustment mechanism, an autofocus mechanism, a manual aperture adjustment mechanism, an automatic aperture mechanism, a main circuit board, and a guide rod assembly.

[0007] The autofocus mechanism is used to drive the optical lens barrel assembly to reciprocate along an axis parallel to the guide rod assembly in order to adjust the focal point of the optical lens barrel assembly. The autofocus mechanism includes multiple optocoupler switches electrically connected to the main circuit board.

[0008] The manual focus adjustment mechanism includes a manual focus adjustment ring with a grid structure. The manual focus adjustment ring is rotatably connected to the fixed lens barrel. The grid structure is directly opposite at least two of the photoelectric coupling switches. When the manual focus ring rotates relative to the fixed lens barrel, the photoelectric coupling switches are used to detect the rotation angle signal between the grid structure and the corresponding photoelectric coupling switch, so that the main circuit board controls the autofocus mechanism to open or close according to the rotation angle signal.

[0009] The manual aperture adjustment mechanism includes an elastic trigger on the fixed lens barrel, a manual aperture adjustment ring with multiple positioning structures, a manual aperture circuit board electrically connected to the main circuit board, and a conductive brush connected to the manual aperture adjustment ring.

[0010] In this configuration, multiple sets of positioning structures are arranged opposite to the elastic trigger, and the contacts of the conductive brush are in contact with the manual aperture circuit board. When the manual aperture adjustment ring rotates relative to the fixed lens barrel, the elastic trigger and the corresponding positioning structure generate corresponding elastic feedback data. The contacts trigger the corresponding pads on the manual aperture circuit board and generate corresponding resistance values. Through the corresponding resistance values ​​and the corresponding elastic feedback data, the main circuit board controls the automatic aperture mechanism to adjust the aperture blades in the fixed lens barrel to form different apertures.

[0011] Furthermore, the guide rod assembly includes a main guide rod and a secondary guide rod. The optical lens barrel assembly is provided with a first circular hole and a waist hole corresponding to the main guide rod and the secondary guide rod, wherein the major axis dimension of the waist hole is larger than the diameter of the secondary guide rod, and the main guide rod and the secondary guide rod are asymmetrically and parallelly arranged inside the fixed lens barrel.

[0012] Furthermore, the autofocus mechanism also includes a focusing circuit board electrically connected to the main circuit board, a first driver, a transmission screw, a moving part, and a slider connected to the optical lens barrel assembly;

[0013] The moving part is connected to the transmission screw and is connected to the slider. The first driver is used to drive the transmission screw to rotate, so that the moving part reciprocates along the direction of the transmission screw, so that the slider adjusts the focal point of the optical lens assembly.

[0014] The first driver is electrically connected to the main circuit board via the focusing circuit board.

[0015] Furthermore, the plurality of optocoupler switches includes a first optocoupler switch, a second optocoupler switch, and a third optocoupler switch electrically connected to the focusing circuit board;

[0016] In this configuration, any two of the first, second, and third optocouplers are directly opposite the fence structure, while the third is fixed inside the fixed lens tube.

[0017] Furthermore, the autofocus mechanism also includes a stop connected to the optical lens barrel assembly;

[0018] The first and second optocouplers are positioned opposite the fence structure, and the third optocoupler is positioned opposite the movement path of the stop. When the optical lens assembly is adjusting its focus, an optocoupler signal is generated between the stop and the third optocoupler, so that the main circuit board resets the drive information of the first driver based on the optocoupler signal.

[0019] Furthermore, the center distance between the first optocoupler switch and the second optocoupler switch is D, and the center distance between the fence structure is E;

[0020] Where D = (n-1)E + 0.25E, and n is the number of barriers between the first optocoupler switch and the second optocoupler switch.

[0021] Furthermore, the automatic aperture mechanism includes an automatic aperture circuit board, a second driver, and a fourth optocoupler switch electrically connected to the main circuit board;

[0022] The second driver is used to adjust the aperture blades to form different apertures, and the fourth optocoupler switch is used to calibrate the driving information of the second driver according to the largest aperture.

[0023] Furthermore, the manual aperture circuit board includes multiple surface mount resistors, as well as sliding pads and multiple rectangular pads arranged opposite to each other, with each surface mount resistor connected in parallel with each of the rectangular pads;

[0024] Wherein, the two contacts on the conductive brush are in contact with the sliding pad and at least one of the rectangular pads respectively, so that when the manual aperture adjustment ring rotates relative to the fixed lens barrel, at least one contact will conduct the corresponding rectangular pad and the sliding pad to generate the corresponding resistance value.

[0025] Furthermore, the movable component is detachably connected to the slider, and the movable component and the slider form a dovetail groove connection structure.

[0026] Furthermore, the composite adjustment device also includes a lens mount, a contact cable with multiple metal contacts, and a contact circuit board connected to the contact cable;

[0027] The lens mount is located on the fixed lens and is used to connect to the camera. The contact circuit board is used to connect to the main circuit board.

[0028] Compared with the prior art, the advantages of using the composite adjustment device for photographic lenses shown in this utility model are as follows:

[0029] This invention provides a composite adjustment device for photographic lenses. The lens includes a fixed lens barrel and an optical lens barrel assembly. The composite adjustment device includes a manual focus adjustment mechanism, an autofocus mechanism, a manual aperture adjustment mechanism, an automatic aperture mechanism, a main circuit board, and a guide rod assembly. When adjusting the lens focus, the main circuit board detects the rotation angle signal between the grid structure and the corresponding photoelectric coupling switch. Based on this rotation angle signal, the main circuit board controls the autofocus mechanism to open or close, achieving micron-level precision autofocus. When adjusting the lens aperture, a spring-loaded trigger and a corresponding positioning structure generate corresponding spring force feedback data. The contact point triggers the corresponding pad on the manual aperture circuit board, generating a corresponding resistance value. Combining this resistance value and the spring force feedback data, the main circuit board controls the automatic aperture mechanism to adjust the aperture blades in the fixed lens barrel to create different apertures. This design solves the problems of insufficient precision and poor operational feedback in traditional single-mode lens adjustments. While maintaining the precision of electric control, it improves the manual operation experience, making it particularly suitable for professional photography and film shooting. Attached Figure Description

[0030] Figure 1 This is a perspective view of a composite adjustment device applied to a camera lens according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Assembly explosion diagram;

[0032] Figure 3 This is a three-dimensional assembly schematic diagram of the autofocus mechanism in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the automatic focusing mechanism in one embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the cooperation between the moving part and the slider in one embodiment of the present invention;

[0035] Figure 6 This is a three-dimensional exploded view of the moving part and the optical lens barrel assembly in one embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the manual focus adjustment mechanism in one embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram showing the cooperation between the fence structure, the first optocoupler switch, and the second optocoupler switch in one embodiment of the present invention.

[0038] Figure 9 This is a schematic diagram of the automatic aperture mechanism in one embodiment of the present invention;

[0039] Figure 10 This is a diagram showing different aperture states of the aperture in one embodiment of the present invention;

[0040] Figure 11 This is an exploded view of the manual aperture adjustment mechanism in one embodiment of the present invention;

[0041] Figure 12 This is a two-dimensional diagram showing the cooperation between the manual aperture circuit board and the conductive brush in one embodiment of the present invention.

[0042] Figure 13 This is a schematic diagram of the main circuit board in one embodiment of the present invention.

[0043] In the diagram: 100, fixed lens barrel; 101, spring cavity structure; 102, lens mount; 103, front retaining cap; 104, rear retaining ring;

[0044] 200. Optical lens tube assembly; 201. First circular hole; 202. Waist hole; 203. Second circular hole; 204. Semi-slotted circular hole structure;

[0045] 300. Manual focus adjustment mechanism; 301. Fence structure; 302. Manual focus adjustment ring;

[0046] 400. Autofocus mechanism; 401. Focusing circuit board; 402. First driver; 403. Drive screw; 404. Moving part; 405. Slider; 4051. Round shaft structure; 4052. First spring; 406. Fixing plate; 407. Dovetail groove connection structure; 408. First optocoupler switch; 409. Second optocoupler switch; 410. Third optocoupler switch; 411. Stop block;

[0047] 500. Manual aperture adjustment mechanism; 501. Elastic trigger element; 5011. Second spring; 5012. Steel ball; 502. Positioning structure; 503. Manual aperture adjustment ring; 5031. Groove step; 504. Manual aperture circuit board; 5041. Chip resistor; 5042. Sliding pad; 5043. Rectangular pad; 505. Conductive brush; 5051. Contact point;

[0048] 600. Automatic aperture mechanism; 601. Automatic aperture circuit board; 602. Second driver; 603. Fourth optocoupler switch;

[0049] 700. Main circuit board; 701. Contact cable; 702. Contact circuit board;

[0050] 800, Guide rod assembly; 801, Main guide rod; 802, Secondary guide rod;

[0051] 900. Aperture blades. Detailed Implementation

[0052] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0053] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] Please see Figures 1-13 The image shows a composite adjustment device for a photographic lens provided by this utility model. The lens includes a fixed lens barrel 100 and an optical lens barrel group 200. It should be noted that in this example, both the fixed lens barrel 100 and the optical lens barrel group 200 belong to the prior art in this field, and their specific structures are not described in detail here.

[0056] To address the technical problem in the background art that the focusing and aperture adjustment methods of lenses cannot simultaneously achieve high precision and automatic adjustment functions, the composite adjustment device in this example includes a manual focus adjustment mechanism 300, an autofocus mechanism 400, a manual aperture adjustment mechanism 500, an automatic aperture mechanism 600, a main circuit board 700, and a guide rod assembly 800.

[0057] The autofocus mechanism 400 is used to drive the optical lens barrel assembly 200 to reciprocate along an axis parallel to the guide rod assembly 800 in order to adjust the focus of the optical lens barrel assembly 200. The autofocus mechanism 400 includes multiple photocoupler switches electrically connected to the main circuit board 700.

[0058] Specifically, please refer to Figure 6As shown, the guide rod assembly 800 includes a main guide rod 801 and a secondary guide rod 802, and the optical lens barrel assembly 200 is provided with a first circular hole 201 and a waist hole 202 corresponding to the main guide rod 801 and the secondary guide rod 802. The major axis dimension of the waist hole 202 is larger than the diameter of the secondary guide rod 802. The main guide rod 801 and the secondary guide rod 802 are asymmetrically and parallelly arranged inside the fixed lens barrel 100.

[0059] It should be noted that the main guide rod 801 and the auxiliary guide rod 802 are specifically fixedly installed on the fixed lens barrel 100, and the diameter of the main guide rod 801 can be 3mm±0.005, and the diameter of the auxiliary guide rod 802 can be 2.5mm±0.005.

[0060] In some preferred embodiments, the machining clearance between the first circular hole 201 and the main guide rod 801 is controlled within 0.01mm, which can reduce the amount of movement during the movement of the optical lens barrel assembly 200; the major axis dimension of the waist hole 202 is 0.2mm larger than the diameter of the secondary guide rod 802, which can reserve a gap for thermal expansion of the lens due to high temperature.

[0061] Please see Figure 4 As shown, the autofocus mechanism 400 also includes a focusing circuit board 401 electrically connected to the main circuit board 700, a first driver 402, a transmission screw 403, a moving part 404, and a slider 405 connected to the optical lens barrel assembly 200.

[0062] The movable part 404 is connected to the transmission screw 403 and is connected to the slider 405. The first driver 402 is used to drive the transmission screw 403 to rotate, so that the movable part 404 reciprocates along the direction of the transmission screw 403, so that the slider 405 adjusts the focal point of the optical lens barrel assembly 200.

[0063] The first driver 402 is electrically connected to the main circuit board 700 via the focusing circuit board 401.

[0064] Specifically, the first driver 402 can be a focusing motor as in the prior art, and the moving part 404 is provided with an internal thread that cooperates with the transmission screw 403, so that the moving part 404 and the transmission screw 403 can cooperate with each other to convert the helical transmission of the first driver 402 to the transmission screw 403 into the linear reciprocating motion of the moving part 404 along a linear axis parallel to the transmission screw 403. The moving part 404 can be used to make the slider 405 drive the optical lens barrel assembly 200 to make linear motion, so that the distance between the optical system in the optical lens barrel assembly 200 and the camera imaging surface changes, and finally realizes the lens focus adjustment function.

[0065] It should be noted that the displacement distance S of the moving part 404 is determined by the step angle α of the first driver 402, the number of driving steps n of the first driver 402, and the thread pitch P of the transmission screw 403, as shown in the formula:

[0066]

[0067] In some preferred embodiments, the thread pitch P of the transmission screw 403 is 0.4 mm with a tolerance of ±0.005 mm, the length of the transmission screw 403 is 9.5 ±0.05 mm, the step angle of the first driver 402 is 4.5°, the width of the moving part 404 is 4.5 mm, and a 1.5 mm allowance is reserved on both sides of the transmission screw 403. From the above formula, it can be obtained that the single-step displacement accuracy of the first driver 402 driving the moving part 404 is 0.005 mm, the maximum displacement distance of the moving part 404 is 2 mm, and the maximum number of single-stroke steps of the first driver 402 is 400 steps.

[0068] Please refer to it again. Figure 4 As shown, in some other preferred embodiments, a fixing plate 406 can also be arranged on the fixing lens barrel 100 for mounting the focusing circuit board 401, the first driver 402, the transmission screw 403 and the moving part 404.

[0069] It should be noted that the main guide rod 801, the auxiliary guide rod 802, and the transmission screw 403 can all adopt an asymmetrical support parallel layout.

[0070] Please see Figure 4 and Figure 5 As shown, in order to facilitate the assembly of the moving part 404, the slider 405 and the optical lens barrel assembly 200, in this embodiment, the moving part 404 and the slider 405 are detachably connected, and the moving part 404 and the slider 405 form a dovetail groove connection structure 407. The dovetail groove connection structure 407 can improve the fitting accuracy and stability of the moving part 404 and the slider 405.

[0071] Please see Figure 6 As shown, the optical lens barrel assembly 200 is designed with a second circular hole 203 and a semi-slotted circular hole structure 204 coaxially distributed. The slider 405 is designed with a circular shaft structure 4051. The circular shaft structure 4051 is machined to fit the second circular hole 203 and the semi-slotted circular hole structure 204 with an interference fit. The interference is 0.01mm to ensure the stability of the installation. The first spring 4052 can be coaxially sleeved on the circular shaft structure 4051 to eliminate the gap difference between the slider 405 and the optical lens barrel assembly 200. It should be noted that the elastic force of the first spring 4052 can be designed to be 0.5N-1N.

[0072] Please refer again to Figure 4. The focusing circuit board 401 connects the first driver 402 to the main circuit board 700, and the main circuit board 700 supplies power to the first driver 402 and transmits signal commands.

[0073] In addition, to solve the problem of the first driver 402 losing synchronization due to the decrease in driving accuracy, in this example, multiple optocoupler switches include a first optocoupler switch 408, a second optocoupler switch 409 and a third optocoupler switch 410 electrically connected to the focusing circuit board 401.

[0074] Specifically, the autofocus mechanism 400 also includes a stop 411 connected to the optical lens assembly 200. A third optocoupler switch 410 is positioned opposite the movement path of the stop 411 so that when the optical lens assembly 200 is adjusting the focus, a photoelectric blocking signal is generated between the stop 411 and the third optocoupler switch 410, causing the main circuit board 700 to reset the drive information of the first driver 402 based on the photoelectric blocking signal.

[0075] Please see Figure 7 As shown, when the optical lens barrel assembly 200 is performing linear reciprocating motion, the optical lens barrel assembly 200 will block the photoelectric signal after the drive stop 411 passes through the third optocoupler switch 410. After receiving the photoelectric blocking signal from the third optocoupler switch 410, the main circuit board 700 will determine that the current position of the optical lens barrel assembly 200 is the preset zero position. At this time, the drive step information of the first driver 402 will be reset, thereby eliminating the step loss problem caused by the decrease in drive accuracy of the first driver 402 during long-term use, and ensuring the accurate operation of the preset autofocus program.

[0076] Please refer to it again. Figure 7 As shown, the manual focus adjustment mechanism 300 includes a manual focus adjustment ring 302 with a grid structure 301. The manual focus adjustment ring 302 is rotatably connected to the fixed lens barrel 100. The grid structure 301 is directly opposite at least two photoelectric coupling switches. When the manual focus ring rotates relative to the fixed lens barrel 100, the photoelectric coupling switches are used to detect the rotation angle signal between the grid structure 301 and the corresponding photoelectric coupling switch, so that the main circuit board 700 controls the autofocus mechanism 400 to open or close according to the rotation angle signal.

[0077] Specifically, the first optocoupler switch 408 and the second optocoupler switch 409 are directly opposite the fence structure 301, which is composed of several fences distributed along the inner circumference of the manual focus adjustment ring 302.

[0078] In some preferred embodiments, the manual focus adjustment ring 302 is coaxially sleeved on the fixed lens barrel 100, and can rotate on the fixed lens barrel 100 with the inner hole shaft as the reference. The manual focus adjustment ring 302 and the fixed lens barrel 100 are fitted with a clearance, with the clearance controlled between 0.005mm and 0.015mm. After assembly, the rotation torque range is controlled between 0.1Nm and 0.2Nm.

[0079] It should be noted that the first optocoupler switch 408 and the second optocoupler switch 409 are directly opposite the fence structure 301. Specifically, the first optocoupler switch 408 and the second optocoupler switch 409 are fixed side by side on the fixed lens barrel 100.

[0080] Please see Figure 8 As shown, in some preferred embodiments, the center distance E of the fence structure 301, the gap e between the fences, the fence width h, the center distance D of the first optocoupler switch 408 and the second optocoupler switch 409, and the number n of fences between the first optocoupler switch 408 and the second optocoupler switch 409 need to satisfy the following geometric relationships:

[0081]

[0082] Through the above structural design, when the manual focus adjustment ring 302 rotates on the fixed lens barrel 100, several barriers alternately block the first photocoupler switch 408 and the second photocoupler switch 409, ultimately achieving four signal combinations, as shown in Table 1 below:

[0083]

[0084] Table 1

[0085] In Table 1, the energized state of the first optocoupler switch 408 and the second optocoupler switch 409 are both defined as "1", and the blocked state is defined as "0". Figure 8 As shown, when the fence structure 301 moves in the forward direction, the signal state changes of the first optocoupler switch 408 and the second optocoupler switch 409 in a cycle of "00→10→11→01→00"; when the fence structure 301 moves in the reverse direction, the signal state changes of the first optocoupler switch 408 and the second optocoupler switch 409 in a cycle of "00→01→11→10→00".

[0086] The above four signal combinations are transmitted to the main circuit board 700 through the focusing circuit board 401. The main circuit board 700 decodes the four state codes through a preset program based on the four signal state combinations. The switching process of the four state codes determines whether the manual focus adjustment ring 302 is rotated and the direction of rotation. The main circuit board 700 then transmits the driving direction and driving step instructions to the first driver 402 through the focusing circuit board 401, thereby completing the function of converting the lens user's action of rotating the manual focus adjustment ring 302 into lens focus adjustment.

[0087] In some preferred embodiments, by pre-programming the main circuit board 700, when a manual operation is detected, the manual command is executed first and the automatic adjustment program is suppressed.

[0088] In some preferred embodiments, the manual focus adjustment ring 302 is designed with a gate gap e of 0.75-0.9mm, and the photoelectric sensing width on the first photocoupler switch 408 and the second photocoupler switch 409 is 0.25mm-0.35mm. The gate is evenly distributed along a circumference with a diameter of 50mm. Calculations show that the manual focus adjustment ring 302 needs to rotate 0.7°-1° to switch the blocking state of the first photocoupler switch 408 and the second photocoupler switch 409. This avoids accidental touches or other reasons that could cause the manual focus adjustment ring 302 to give an incorrect command with a small angle of rotation.

[0089] Please see Figure 9 As shown, the automatic aperture mechanism 600 includes an automatic aperture circuit board 601, a second driver 602, and a fourth optocoupler switch 603, which are electrically connected to the main circuit board 700.

[0090] The second driver 602 is used to adjust the aperture blades 900 to form different apertures, and the fourth optocoupler switch 603 is used to calibrate the driving information of the second driver 602 according to the largest aperture.

[0091] like Figure 10 The automatic aperture shown consists of nine aperture blades 900, forming different aperture sizes. Depending on the number of driving steps of the second driver 602, different aperture sizes are formed, such as: φ11.2mm, φ10.28mm, φ7.4mm, φ5.2mm, φ3.68mm, φ2.65mm, φ1.9mm, and φ1.25mm.

[0092] Preferably, the automatic aperture mechanism 600 is mounted on the optical lens barrel assembly 200, and an automatic aperture circuit board 601 is provided on it, connected to the main circuit board 700. The main circuit board 700 supplies power to the second driver 602 and transmits the drive step signal to adjust the lens aperture size. By converting the drive step signal with a preset program, the aperture value is determined. This mechanism ensures automatic control of the aperture size and allows the main circuit board 700 to monitor the lens aperture value in real time.

[0093] Please see Figure 11 As shown, the manual aperture adjustment mechanism 500 includes an elastic trigger 501 disposed on the fixed lens barrel 100, a manual aperture adjustment ring 503 having multiple positioning structures 502, a manual aperture circuit board 504 electrically connected to the main circuit board 700, and a conductive brush 505 connected to the manual aperture adjustment ring 503.

[0094] In this setup, multiple positioning structures 502 are positioned opposite to the elastic trigger 501. The contact 5051 of the conductive brush 505 contacts the manual aperture circuit board 504. When the manual aperture adjustment ring 503 rotates relative to the fixed lens barrel 100, the elastic trigger 501 and the corresponding positioning structure 502 generate corresponding elastic feedback data. The contact 5051 and the corresponding pad on the manual aperture circuit board 504 trigger and generate a corresponding resistance value. Through the corresponding resistance value and the corresponding elastic feedback data, the main circuit board 700 controls the automatic aperture mechanism 600 to adjust the aperture blades 900 in the fixed lens barrel 100 to form different apertures.

[0095] Please see Figure 12 As shown, in this embodiment, the manual aperture circuit board 504 includes a plurality of surface mount resistors 5041, and a plurality of rectangular pads 5042 and a plurality of rectangular pads 5043 arranged opposite to each other, with each surface mount resistor 5041 connected in parallel with each rectangular pad 5043.

[0096] Among them, the two contacts 5051 on the conductive brush 505 are in contact with the sliding pad 5042 and at least one rectangular pad 5043 respectively, so that when the manual aperture adjustment ring 503 rotates relative to the fixed lens barrel 100, at least one contact 5051 will conduct the corresponding rectangular pad 5043 and the sliding pad 5042 to generate the corresponding resistance value.

[0097] In some preferred embodiments, the elastic trigger 501 may be composed of a second spring 5011 and a steel ball 5012, and a spring cavity structure 101 for assembling the elastic trigger 501 is designed on the fixed lens barrel 100. The second spring 5011 and the steel ball 5012 are sequentially assembled in the spring cavity structure 101. The diameter of the steel ball 5012 is 1mm ± 0.005mm, and the stiffness coefficient of the second spring 5011 is 0.8N / mm ± 5%.

[0098] In some preferred embodiments, the manual aperture circuit board 504 is attached to the outer circular surface of the fixed lens barrel 100 using a high-temperature resistant 0.1mm double-sided adhesive layer at 80°C.

[0099] Specifically, please refer to Figure 12 The diagram shows the unfolded view of the manual aperture circuit board 504. It features a conductive sliding pad 5042 with a surface roughness requirement of Ra < 0.4 μm. Twenty-one conductive rectangular pads 5043 are arranged in a linear array, with a center-to-center distance of 1.6 mm ± 0.01 mm between adjacent rectangular pads 5043 and a pre-reserved gap of 0.15 mm to 0.2 mm between them. Twenty-one 100Ω surface mount resistors 5041 are arranged in a linear array and connected in series with wires. The surface mount resistors 5041R1-R21 are connected in parallel with the rectangular pads 50431-21, respectively.

[0100] The manual aperture adjustment ring 503 has a groove step 5031 structure designed in its inner diameter, and the conductive brush 505 is fixedly installed in the groove step 5031 of the manual aperture adjustment ring 503.

[0101] The conductive brush 505 is designed with two forked contacts 5051. The distance between the contacts 5051 is designed according to the distance between the sliding pad 5042 and the rectangular pad 5043 to ensure that the contacts 5051 can contact the sliding pad 5042 and one of the rectangular pads 5043 respectively.

[0102] Preferably, the inner circumference of the manual aperture adjustment ring 503 is designed with 21 sets of R0.5mm positioning structures 502, specifically spherical surfaces, and the center angle of adjacent positioning structures 502 is 3.6°±0.1°, forming a precise positioning fit with the elastic trigger 501.

[0103] In other words, when the manual aperture adjustment ring 503 rotates relative to the fixed lens barrel 100, the elastic trigger 501 and the corresponding positioning structure 502 generate corresponding elastic feedback data, and the contact 5051 and the corresponding pad on the manual aperture circuit board 504 trigger and generate the corresponding resistance value.

[0104] Specifically, the manual aperture adjustment ring 503 generates 0.5N±0.1N of elastic feedback data every 3.6° rotation. At different rotation angles, the conductive brush 505 makes one of the 21 rectangular pads 5043 and the sliding pad 5042 conduct, forming 21 resistance values ​​(100Ω-2100Ω, in 100Ω increments).

[0105] When the corresponding resistance value of the elastic feedback data is obtained, the main circuit board 700 will determine the aperture value of the lens currently needed by the user according to the preset program, and output the driving step signal to the second driver 602 to realize the change of the aperture size of the lens to meet the optical requirements, thereby achieving the function of manually controlling the aperture size.

[0106] It should be noted that the corresponding drive steps, aperture ring angle, and resistance values ​​of the second driver 602 for the aperture value are shown in Table 2 below:

[0107]

[0108] Table 2

[0109] As shown in Table 2 above, the lens manual aperture adjustment mechanism 500 is designed with 21 settings. The 21st automatic setting is where the lens receives aperture adjustment instructions from the camera according to a preset program. The 1st to 19th settings are manual adjustment settings, where the user adjusts the lens aperture size. There are 20 transition settings between the automatic and manual modes to ensure stability and safety during the automatic / manual mode switching process.

[0110] In some preferred embodiments, please refer to Figure 13 As shown, the composite adjustment device also includes a lens mount 102, a contact cable 701 with multiple metal contacts 5051, and a contact circuit board 702 connected to the contact cable 701. The lens mount 102 is mounted on a fixed lens and is used to connect to a camera. The contact circuit board 702 is used to connect to the main circuit board 700.

[0111] Specifically, the contact cable 701 is designed with several conductive metal contact structures; the contact cable 701 is installed and fixed on the lens mount 102. After the lens mount 102 is connected to the camera, the contact cable 701 and the contacts on the camera can connect to satisfy the signal transmission between the lens and the camera and provide power to the lens.

[0112] In some other preferred embodiments, the lens also includes a front retaining cap 103 and a rear retaining ring 104 for mounting on the fixed lens barrel 100.

[0113] In summary, the composite adjustment device for photographic lenses provided by this utility model has at least the following effective effects compared with the existing methods for adjusting the focus and aperture of lenses:

[0114] In the composite adjustment device for photographic lenses provided by this utility model, the lens includes a fixed lens barrel 100 and an optical lens barrel group 200. The composite adjustment device includes a manual focus adjustment mechanism 300, an autofocus mechanism 400, a manual aperture adjustment mechanism 500, an automatic aperture mechanism 600, a main circuit board 700, and a guide rod group 800. When adjusting the focus of the lens, by detecting the rotation angle signal between the grid structure 301 and the corresponding photoelectric coupling switch, the main circuit board 700 can control the autofocus mechanism 400 to open or close according to the rotation angle signal, achieving micron-level precision autofocus. When the aperture is adjusted, the elastic trigger 501 and the corresponding positioning structure 502 generate corresponding elastic feedback data. The contact 5051 triggers the corresponding pad on the manual aperture circuit board 504 and generates a corresponding resistance value. Combining the corresponding resistance value and the corresponding elastic feedback data, the main circuit board 700 controls the automatic aperture mechanism 600 to adjust the aperture blades 900 in the fixed lens barrel 100 to form different apertures. This setting can solve the problems of insufficient accuracy and poor operation feedback in the traditional lens single adjustment mode. While maintaining the accuracy of electric control, it improves the manual operation experience, which is especially suitable for professional photography and film shooting.

[0115] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0116] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A compound adjustment device applied to a photographic lens, the lens comprising a fixed barrel and an optical barrel group, characterized in that, The composite adjustment device includes a manual focus adjustment mechanism, an autofocus mechanism, a manual aperture adjustment mechanism, an auto aperture mechanism, a main circuit board, and a guide rod assembly. The autofocus mechanism is used to drive the optical lens barrel assembly to reciprocate along an axis parallel to the guide rod assembly in order to adjust the focal point of the optical lens barrel assembly. The autofocus mechanism includes multiple optocoupler switches electrically connected to the main circuit board. The manual focus adjustment mechanism includes a manual focus adjustment ring with a grid structure, the manual focus adjustment ring being rotatably connected to the fixed lens barrel, and the grid structure being directly opposite at least two of the photoelectric coupling switches; The manual aperture adjustment mechanism includes an elastic trigger on the fixed lens barrel, a manual aperture adjustment ring with multiple positioning structures, a manual aperture circuit board electrically connected to the main circuit board, and a conductive brush connected to the manual aperture adjustment ring. In this configuration, multiple sets of positioning structures are arranged opposite to the elastic trigger, and the contacts of the conductive brush are in contact with the manual aperture circuit board.

2. The composite adjustment device for a photographic lens according to claim 1, characterized in that, The guide rod assembly includes a main guide rod and a secondary guide rod. The optical lens barrel assembly is provided with a first circular hole and a waist hole corresponding to the main guide rod and the secondary guide rod. The major axis dimension of the waist hole is larger than the diameter of the secondary guide rod. The main guide rod and the secondary guide rod are asymmetrically and parallelly arranged inside the fixed lens barrel.

3. The composite adjustment device for a photographic lens according to claim 1, characterized in that, The autofocus mechanism also includes a focusing circuit board electrically connected to the main circuit board, a first driver, a transmission screw, a moving part, and a slider connected to the optical lens barrel assembly. The moving part is connected to the transmission screw and is connected to the slider. The first driver is used to drive the transmission screw to rotate, so that the moving part reciprocates along the direction of the transmission screw, so that the slider adjusts the focal point of the optical lens assembly. The first driver is electrically connected to the main circuit board via the focusing circuit board.

4. The composite adjustment device for a photographic lens according to claim 3, characterized in that, The plurality of optocoupler switches includes a first optocoupler switch, a second optocoupler switch, and a third optocoupler switch that are electrically connected to the focusing circuit board; In this configuration, any two of the first, second, and third optocouplers are directly opposite the fence structure, while the third is fixed inside the fixed lens tube.

5. The composite adjustment device for a photographic lens according to claim 4, characterized in that, The autofocus mechanism also includes a stop block connected to the optical lens barrel assembly; The first and second optocouplers are positioned opposite the fence structure, and the third optocoupler is positioned opposite the moving path of the block.

6. The composite adjustment device for a photographic lens according to claim 4, characterized in that, The center distance between the first optocoupler switch and the second optocoupler switch is D, and the center distance between the fence structure is E; Where D = (n-1)E + 0.25E, and n is the number of barriers between the first optocoupler switch and the second optocoupler switch.

7. The composite adjustment device for a photographic lens according to claim 1, characterized in that, The automatic aperture mechanism includes an automatic aperture circuit board, a second driver, and a fourth optocoupler switch that are electrically connected to the main circuit board. The second driver is used to adjust the aperture blades to form different apertures, and the fourth optocoupler switch is used to calibrate the driving information of the second driver according to the largest aperture.

8. The composite adjustment device for a photographic lens according to claim 1, characterized in that, The manual aperture circuit board includes multiple surface mount resistors, as well as sliding pads and multiple rectangular pads arranged opposite to each other, with each surface mount resistor connected in parallel with each rectangular pad. The two contacts on the conductive brush are in contact with the sliding pad and at least one of the rectangular pads, respectively.

9. The composite adjustment device for a photographic lens according to claim 1, characterized in that, The movable component and the slider are detachably connected, and the movable component and the slider form a dovetail groove connection structure.

10. The composite adjustment device for a photographic lens according to claim 1, characterized in that, The composite adjustment device also includes a lens mount, a contact cable with multiple metal contacts, and a contact circuit board connected to the contact cable. The lens mount is located on the fixed lens and is used to connect to the camera. The contact circuit board is used to connect to the main circuit board.

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