Composite adjusting device applied to photographic lens

Abstract

The invention provides a composite adjusting device applied to a photographic lens, and relates to the technical field of photographic lenses, the lens comprises a fixed lens cone and an optical lens cone group, the composite adjusting device comprises a manual focusing adjusting mechanism, an automatic focusing mechanism, a manual aperture adjusting mechanism, an automatic aperture mechanism, a main circuit board and a guide rod group, the problem that a traditional lens is insufficient in single adjustment mode precision and poor in operation feedback can be solved, the manual control experience is improved while the electric control precision is kept, and the method is particularly suitable for the fields of professional photography and film and television shooting.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic lenses, and in particular to a composite adjustment device applied to photographic lenses. Background Art

[0002] The focus control and aperture adjustment of the lens are its core functions, 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, but inconsistencies in assembly precision and adjustment force may lead to insufficient lens adjustment accuracy. On the other hand, automatic adjustment uses motors and electronic preset programs to enable the lens to automatically adjust the angle according to the clarity of the picture and automatically control the aperture size according to shooting requirements. However, complex shooting environments may cause automatic adjustment to fail, thereby affecting the user experience.

[0004] Therefore, the existing focus and aperture adjustment methods for lenses cannot achieve both high precision and automatic adjustment functions. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a composite adjustment device for a photographic lens to solve the technical problem that the focus and aperture adjustment methods of the lens in the background art cannot simultaneously take into account the functions of high precision and automatic adjustment.

[0006] The present invention provides a composite adjustment device for a photographic lens, wherein the lens comprises a fixed lens barrel and an optical lens barrel assembly, and the composite adjustment device comprises a manual focus adjustment mechanism, an automatic focus mechanism, a manual aperture adjustment mechanism, an automatic 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 axial direction parallel to the guide rod assembly to adjust the focus of the optical lens barrel assembly, wherein the autofocus mechanism includes a plurality of photoelectric coupling switches electrically connected to the main circuit board; The manual focus adjustment mechanism includes a manual focus adjustment ring having a fence structure, the manual focus adjustment ring being rotatably connected to the fixed lens barrel, the fence structure being opposite to at least two of the photoelectric coupling switches, and when the manual focus ring rotates relative to the fixed lens barrel, the photoelectric coupling switches are configured to detect a rotation angle signal between the fence structure and the corresponding photoelectric coupling switches, so that the main circuit board controls the automatic focus mechanism to be turned on or off according to the rotation angle signal; The manual aperture adjustment mechanism includes an elastic trigger member provided on the fixed lens barrel, a manual aperture adjustment ring having multiple groups of 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; Among them, multiple groups of the positioning structures are arranged opposite to the elastic triggering members, and the contacts of the conductive brushes are in contact with the manual aperture circuit board. When the manual aperture adjustment ring rotates relative to the fixed lens barrel, the elastic triggering members and the corresponding positioning structures generate corresponding elastic force feedback data, and the contacts are triggered by the corresponding pads on the manual aperture circuit board and generate corresponding resistance values. Through the corresponding resistance values ​​and the corresponding elastic force 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.

[0007] Furthermore, the guide rod group includes a main guide rod and a secondary guide rod, and the optical lens barrel group is provided with a first circular hole and a waist hole corresponding to the main guide rod and the secondary guide rod, wherein the long axis size 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 in the fixed lens barrel.

[0008] Furthermore, the autofocus mechanism further comprises a focus 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 member is transmission-connected to the transmission screw, and the moving member is connected to the slider. The first driver is used to drive the transmission screw to rotate, so that the moving member reciprocates along the direction of the transmission screw, so that the slider adjusts the focus of the optical lens tube assembly. Wherein, the first driver is electrically connected to the main circuit board through the focusing circuit board.

[0009] Further, the plurality of photoelectric coupling switches include a first photoelectric coupling switch, a second photoelectric coupling switch and a third photoelectric coupling switch electrically connected to the focus circuit board; Any two of the first photoelectric coupling switch, the second photoelectric coupling switch and the third photoelectric coupling switch are opposite to the fence structure, and the other one is fixed in the fixed lens barrel.

[0010] Furthermore, the autofocus mechanism further includes a stopper connected to the optical lens barrel assembly; The first photoelectric coupling switch and the second photoelectric coupling switch are opposite to the fence structure, and the third photoelectric coupling switch is opposite to the moving path of the block, so that when the optical lens barrel assembly is adjusting the focus, a photoelectric shielding signal is generated between the block and the third photoelectric coupling switch, so that the main circuit board resets the driving information of the first driver according to the photoelectric shielding signal.

[0011] Furthermore, the center distance between the first photoelectric coupling switch and the second photoelectric coupling switch is D, and the center distance between the fence structure is E; Wherein, D=(n-1)E+0.25E, and n is the number of barriers between the first photoelectric coupling switch and the second photoelectric coupling switch.

[0012] Furthermore, the automatic aperture mechanism includes an automatic aperture circuit board electrically connected to the main circuit board, a second driver, and a fourth photoelectric coupling switch; The second driver is used to adjust the aperture blades to form different apertures, and the fourth photoelectric coupling switch is used to calibrate the driving information of the second driver according to the maximum aperture.

[0013] Furthermore, the manual aperture circuit board includes a plurality of chip resistors, and a sliding pad and a plurality of rectangular pads arranged opposite to each other, and each of the chip resistors is connected in parallel with each of the rectangular pads; 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 of the contacts connects the corresponding rectangular pad and the sliding pad to generate a corresponding resistance value.

[0014] Furthermore, the movable member is detachably connected to the slider, and a dovetail groove connection structure is formed between the movable member and the slider.

[0015] Furthermore, the composite adjustment device further includes a lens mount, a contact cable having a plurality of metal contacts, and a contact circuit board connected to the contact cable; Wherein, the lens mount is provided on the fixed lens, the lens mount is used to be connected to the camera, and the contact circuit board is used to be connected to the main circuit board.

[0016] Compared with the prior art, the composite adjustment device for a photographic lens shown in the present invention has the following advantages: In a composite adjustment device for a photographic lens provided by the present invention, the lens includes a fixed lens barrel and an optical lens barrel assembly, and the composite adjustment device includes a manual focus adjustment mechanism, an automatic focus mechanism, a manual aperture adjustment mechanism, an automatic aperture mechanism, a main circuit board, and a guide rod assembly. When adjusting the focus of the lens, the main circuit board detects a rotation angle signal between a fence structure and a corresponding photoelectric coupling switch, enabling the main circuit board to control the automatic focus mechanism to open or close based on the rotation angle signal, thereby achieving micron-level autofocus. When adjusting the aperture of the lens, an elastic trigger member and a corresponding positioning structure generate corresponding spring force feedback data. Contacts trigger corresponding pads on the manual aperture circuit board and generate corresponding resistance values. Combining the corresponding resistance values ​​and the corresponding spring force 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. This arrangement solves the problems of insufficient precision and poor operational feedback in traditional lens single adjustment modes, maintaining the accuracy of electric control while improving the manual operation experience. The device is particularly suitable for professional photography and filming. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of a composite adjustment device applied to a photographic lens in one embodiment of the present invention; Figure 2 for Figure 1 Assembly explosion diagram; Figure 3 is a schematic diagram of a three-dimensional assembly of an autofocus mechanism according to an embodiment of the present invention; Figure 4 Schematic diagram of the structure of an autofocus mechanism in one embodiment of the present invention; Figure 5 This is a schematic diagram of the cooperation between the moving part and the slider in one embodiment of the present invention; Figure 6 This is a three-dimensional exploded view of the assembly of the moving part and the optical lens barrel assembly in one embodiment of the present invention; Figure 7 A schematic diagram of a manual focus adjustment mechanism according to an embodiment of the present invention; Figure 8 Schematic diagram of the coordination between the fence structure, the first photoelectric coupling switch, and the second photoelectric coupling switch in one embodiment of the present invention; Figure 9 Schematic diagram of an automatic aperture mechanism in one embodiment of the present invention; Figure 10 1 is a diagram of different aperture states of the aperture in one embodiment of the present invention; Figure 11 This is an exploded diagram of a manual aperture adjustment mechanism according to an embodiment of the present invention; Figure 12A two-dimensional diagram of the cooperation between the manual aperture circuit board and the conductive brush in one embodiment of the present invention; Figure 13 Schematic diagram of the structure of the main circuit board in one embodiment of the present invention.

[0018] In the figure: 100, fixed lens barrel; 101, spring chamber structure; 102, lens mount; 103, front fixed pressure cover; 104, rear fixing ring; 200, optical lens barrel assembly; 201, first circular hole; 202, waist hole; 203, second circular hole; 204, semi-slotted circular hole structure; 300, manual focus adjustment mechanism; 301, fence structure; 302, manual focus adjustment ring; 400, autofocus mechanism; 401, focus circuit board; 402, first driver; 403, transmission screw; 404, moving part; 405, slider; 4051, circular shaft structure; 4052, first spring; 406, fixing plate; 407, dovetail groove connection structure; 408, first photoelectric coupling switch; 409, second photoelectric coupling switch; 410, third photoelectric coupling switch; 411, stopper; 500, manual aperture adjustment mechanism; 501, elastic trigger; 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; 600, automatic aperture mechanism; 601, automatic aperture circuit board; 602, second driver; 603, fourth photoelectric coupling switch; 700, main circuit board; 701, contact cable; 702, contact circuit board; 800, guide rod assembly; 801, main guide rod; 802, auxiliary guide rod; 900. Aperture blades. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] See also Figures 1-13 , shown is a composite adjustment device applied to a photographic lens provided by the present invention, wherein the lens includes a fixed lens barrel 100 and an optical lens barrel assembly 200. It should be noted that, in this example, the fixed lens barrel 100 and the optical lens barrel assembly 200 both belong to the existing technology in this field, and the specific structure is not specifically described here.

[0023] In order to solve the technical problem that the focus and aperture adjustment method of the lens in the background technology cannot take into account both high precision and automatic adjustment functions, in this example, the composite adjustment device includes a manual focus adjustment mechanism 300, an automatic focus mechanism 400, a manual aperture adjustment mechanism 500, an automatic aperture mechanism 600, a main circuit board 700 and a guide rod group 800.

[0024] 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 to adjust the focus of the optical lens barrel assembly 200 . The autofocus mechanism 400 includes a plurality of photoelectric coupling switches electrically connected to the main circuit board 700 .

[0025] Specifically, see Figure 6 As shown, the guide rod group 800 includes a main guide rod 801 and a secondary guide rod 802, and the optical lens barrel group 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, wherein the long axis size of the waist hole 202 is larger than the diameter of the secondary guide rod 802, and the main guide rod 801 and the secondary guide rod 802 are asymmetrically arranged in parallel in the fixed lens barrel 100.

[0026] It should be noted that the main guide rod 801 and the auxiliary guide rod 802 are fixedly mounted on the fixed lens barrel 100 , and the diameter of the main guide rod 801 can be 3 mm±0.005, and the diameter of the auxiliary guide rod 802 can be 2.5 mm±0.005.

[0027] In some preferred embodiments, the machining clearance between the first circular hole 201 and the main guide rod 801 is controlled within 0.01 mm, which can reduce the amount of movement during the movement of the optical lens tube assembly 200; the major axis dimension of the waist hole 202 is 0.2 mm larger than the diameter of the secondary guide rod 802, which can reserve a thermal expansion gap for the lens affected by high temperature.

[0028] See also Figure 4 As shown, the autofocus mechanism 400 further includes a focus circuit board 401 electrically connected to the main circuit board 700 , a first driver 402 , a transmission screw 403 , a moving member 404 , and a slider 405 connected to the optical lens barrel assembly 200 ; The moving member 404 is connected to the transmission screw 403, and the moving member 404 is connected to the slider 405. The first driver 402 is used to drive the transmission screw 403 to rotate, so that the moving member 404 reciprocates along the direction of the transmission screw 403, so that the slider 405 adjusts the focus of the optical lens tube assembly 200; The first driver 402 is electrically connected to the main circuit board 700 through the focus circuit board 401 .

[0029] Specifically, the first driver 402 can adopt a focus motor in the prior art, and an internal thread that cooperates with the transmission screw 403 is arranged on the moving member 404, so that the moving member 404 and the transmission screw 403 can cooperate with each other to convert the spiral transmission of the first driver 402 to the transmission screw 403 into a linear reciprocating motion of the moving member 404 parallel to the axial direction of the transmission screw 403. The moving member 404 can be used to allow the slider 405 to drive the optical lens tube group 200 to perform linear motion, so that the distance between the optical system in the optical lens tube group 200 and the camera imaging surface changes, and ultimately realize the lens focus adjustment function.

[0030] It should be noted that the displacement distance S of the moving member 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, and the formula is:

[0031] In some preferred embodiments, the thread pitch P of the transmission screw 403 is 0.4mm, the tolerance is ±0.005mm, the length of the transmission screw 403 is 9.5±0.05mm, the step angle of the first driver 402 is 4.5°, the width of the moving part 404 is 4.5mm, and a 1.5mm margin 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 0.005mm, the maximum displacement distance of the moving part 404 is 2mm, and the maximum number of single-step driving steps of the first driver 402 is 400 steps.

[0032] Please refer again Figure 4 As shown, in some other preferred embodiments, a fixing plate 406 may be arranged on the fixed lens barrel 100 for assembling the focusing circuit board 401 , the first driver 402 , the transmission screw 403 and the moving member 404 .

[0033] It should be noted that the main guide rod 801, the auxiliary guide rod 802 and the transmission screw rod 403 can all adopt an asymmetric support parallel layout.

[0034] See also Figure 4 and Figure 5 As shown, in order to facilitate the mutual assembly of the moving member 404, the slider 405 and the optical lens tube assembly 200, in this embodiment, the moving member 404 and the slider 405 are detachably connected, and a dovetail groove connection structure 407 is formed between the moving member 404 and the slider 405. The dovetail groove connection structure 407 can improve the matching accuracy and stability of the moving member 404 and the slider 405.

[0035] See also Figure 6 As shown, the optical lens tube assembly 200 is designed with a coaxially distributed second circular hole 203 and a semi-slotted circular hole structure 204, and the slider 405 is designed with a circular shaft structure 4051. The circular shaft structure 4051 and the second circular hole 203 and the semi-slotted circular hole structure 204 are machined to form an interference fit. The interference fit is 0.01 mm to ensure installation stability, and a 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 tube assembly 200. It should be noted that the elastic force of the first spring 4052 can be designed to be 0.5N-1N.

[0036] Please refer to FIG4 again, 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 instructions.

[0037] In addition, in order to solve the problem of desynchronization of the first driver 402 due to reduced driving accuracy, in this example, multiple photoelectric coupling switches include a first photoelectric coupling switch 408, a second photoelectric coupling switch 409 and a third photoelectric coupling switch 410 electrically connected to the focusing circuit board 401.

[0038] Specifically, the autofocus mechanism 400 further includes a stopper 411 connected to the optical lens barrel assembly 200, and the third photoelectric coupling switch 410 is aligned with the movement path of the stopper 411. When the optical lens barrel assembly 200 is adjusting the focus, a photoelectric shielding signal is generated between the stopper 411 and the third photoelectric coupling switch 410, so that the main circuit board 700 resets the driving information of the first driver 402 according to the photoelectric shielding signal. See also Figure 7 As shown, when the optical lens tube assembly 200 performs linear reciprocating motion, the optical lens tube assembly 200 drives the block 411 to pass through the third photoelectric coupling switch 410 to block the photoelectric signal. After receiving the photoelectric blocking signal from the third photoelectric coupling switch 410, the main circuit board 700 determines that the current position of the optical lens tube assembly 200 is the preset zero position. At this time, the driving step information of the first driver 402 is reset, thereby eliminating the step loss problem caused by the reduction in driving accuracy of the first driver 402 during long-term use, thereby ensuring the accurate operation of the preset autofocus program.

[0039] Please refer again Figure 7 As shown, the manual focus adjustment mechanism 300 includes a manual focus adjustment ring 302 having a fence structure 301. The manual focus adjustment ring 302 is rotatably connected to the fixed lens barrel 100. The fence structure 301 is opposite to at least two photoelectric coupling switches. When the manual focus ring rotates relative to the fixed lens barrel 100, the photoelectric coupling switch is used to detect the rotation angle signal between the fence structure 301 and the corresponding photoelectric coupling switch, so that the main circuit board 700 controls the automatic focus mechanism 400 to be turned on or off according to the rotation angle signal.

[0040] Specifically, the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 are opposite to the fence structure 301 . The fence structure 301 is specifically composed of a plurality of fences distributed along the inner circumference of the manual focus adjustment ring 302 .

[0041] 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 axis as the reference, and the fit between the manual focus adjustment ring 302 and the fixed lens barrel 100 is a clearance fit, the clearance is controlled at 0.005mm-0.015mm, and the rotational torque range after assembly is controlled at 0.1Nm-0.2Nm.

[0042] It should be noted that the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 are opposite to the fence structure 301 . Specifically, the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 are fixed side by side on the fixed lens barrel 100 .

[0043] See also 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 photoelectric coupling switch 408 and the second photoelectric coupling switch 409, and the number n of fences between the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 need to satisfy the following geometric relationship:

[0044] The above structural design satisfies the requirement that when the manual focus adjustment ring 302 rotates on the fixed lens barrel 100, a plurality of barriers alternately shield the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409, ultimately achieving four signal combinations, as shown in Table 1 below:

[0045] Table 1 The power-on state of the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 in Table 1 are both defined as "1", and the blocking state is both defined as "0". Figure 8 As shown, when the fence structure 301 moves forward, the signal states of the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 change to a cycle of: "00→10→11→01→00"; when the fence structure 301 moves backward, the signal states of the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 change to a cycle of: "00→01→11→10→00".

[0046] The above four signal combinations are transmitted to the main circuit board 700 through the focus circuit board 401. The four state codes are decoded by a preset program in the main circuit board 700 through the four signal state combinations. The switching process of the four state codes is used to determine whether the manual focus adjustment ring 302 is rotated and the rotation direction. The main circuit board 700 then transmits the driving direction and driving step instructions to the first driver 402 through the focus circuit board 401, thereby completing the function of converting the action of the lens user rotating the manual focus adjustment ring 302 into lens focus adjustment.

[0047] In some preferred embodiments, by pre-programming the main circuit board 700, when manual operation is detected, manual instructions are executed first and the automatic adjustment program is suppressed; In some preferred embodiments, the manual focus adjustment ring 302 is designed with a fence gap e of 0.75-0.9 mm, the photoelectric sensing width on the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409 is 0.25 mm-0.35 mm, and the fences are evenly distributed along a circle with a diameter of 50 mm. It is calculated that the manual focus adjustment ring 302 needs to be rotated 0.7°-1° to switch the blocking state of the first photoelectric coupling switch 408 and the second photoelectric coupling switch 409, thereby avoiding the error instruction caused by the manual focus adjustment ring 302 rotating at a small angle due to accidental touch or other reasons.

[0048] See also Figure 9 As shown, the automatic aperture mechanism 600 includes an automatic aperture circuit board 601 electrically connected to the main circuit board 700, a second driver 602 and a fourth photoelectric coupling switch 603; The second driver 602 is used to adjust the aperture blades 900 to form different apertures, and the fourth photoelectric coupling switch 603 is used to calibrate the driving information of the second driver 602 according to the maximum aperture.

[0049] like Figure 10 The automatic aperture shown is composed of 9 aperture blades 900 of different aperture sizes, which form apertures of different aperture sizes according to the driving steps of the second driver 602, such as: φ11.2mm, φ10.28mm, φ7.4mm, φ5.2mm, φ3.68mm, φ2.65mm, φ1.9mm, φ1.25mm.

[0050] Preferably, the automatic aperture mechanism 600 is mounted on the optical lens barrel assembly 200. It houses an automatic aperture circuit board 601, which is connected to a main circuit board 700. The main circuit board 700 supplies power to the second driver 602 and transmits a drive step signal to adjust the lens aperture. The aperture value is determined by converting the drive step signal into a preset program. This mechanism ensures automatic aperture control and allows the main circuit board 700 to monitor the lens aperture value in real time.

[0051] See also Figure 11 As shown, the manual aperture adjustment mechanism 500 includes an elastic trigger member 501 provided on the fixed lens barrel 100, a manual aperture adjustment ring 503 having multiple sets of 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; Among them, multiple groups of positioning structures 502 are arranged opposite to the elastic trigger part 501, and the contact 5051 of the conductive brush 505 is in contact with the manual aperture circuit board 504. When the manual aperture adjustment ring 503 rotates relative to the fixed lens barrel 100, the elastic trigger part 501 and the corresponding positioning structure 502 generate corresponding elastic force feedback data, and the contact 5051 and the corresponding pad on the manual aperture circuit board 504 are triggered and generate corresponding resistance values. Through the corresponding resistance values ​​and the corresponding elastic force 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.

[0052] See also Figure 12 As shown, in this embodiment, the manual aperture circuit board 504 includes a plurality of chip resistors 5041, and a sliding pad 5042 and a plurality of rectangular pads 5043 arranged opposite to each other. Each chip resistor 5041 is connected in parallel with each rectangular pad 5043. 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 connects the corresponding rectangular pad 5043 and the sliding pad 5042 to generate a corresponding resistance value.

[0053] In some preferred embodiments, the elastic trigger member 501 can be composed of a second spring 5011 and a steel ball 5012, and a spring cavity structure 101 for assembling the elastic trigger member 501 is designed on the fixed lens barrel 100, and the second spring 5011 and the steel ball 5012 are assembled in the spring cavity structure 101 in sequence. The diameter of the steel ball 5012 is 1 mm ± 0.005 mm, and the stiffness coefficient of the second spring 5011 is 0.8 N / mm ± 5%.

[0054] In some preferred embodiments, the manual aperture circuit board 504 is attached to the outer circumferential surface of the fixed lens barrel 100 using a 0.1 mm double-sided adhesive layer that is resistant to high temperatures of 80°C.

[0055] Specifically, see Figure 12 The figure shows an expanded view of the manual aperture circuit board 504, which is designed with a conductive sliding pad 5042 with a surface roughness requirement of Ra < 0.4 μm. Twenty-one conductive rectangular pads 5043 are distributed along a linear array. The center distance between adjacent rectangular pads 5043 is 1.6 mm ± 0.01 mm, and a gap of 0.15 mm to 0.2 mm is reserved between adjacent rectangular pads 5043. Twenty-one 100Ω chip resistors 5041 are distributed along a linear array and connected in series via wires. Chip resistors 5041R1-R21 are connected in parallel with rectangular pads 50431-21, respectively. A groove step 5031 is designed on the inner diameter of the manual aperture adjustment ring 503, and the conductive brush 505 is fixedly installed in the groove step 5031 of the manual aperture adjustment ring 503; The conductive brush 505 is designed with two bifurcated 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 contact 5051 can contact the sliding pad 5042 and one of the rectangular pads 5043 respectively. Preferably, 21 groups of R0.5mm positioning structures 502 are designed on the inner circumference of the manual aperture adjustment ring 503 , specifically spherical surfaces, and the center angles of adjacent positioning structures 502 are 3.6°±0.1°, forming a precise positioning fit with the elastic trigger member 501 .

[0056] That is, when the manual aperture adjustment ring 503 rotates relative to the fixed lens barrel 100, the elastic trigger member 501 and the corresponding positioning structure 502 generate corresponding elastic force feedback data, and the contact 5051 and the corresponding pad on the manual aperture circuit board 504 are triggered and generate corresponding resistance values.

[0057] Specifically, every time the manual aperture adjustment ring 503 rotates 3.6°, it will generate elastic force feedback data of 0.5N±0.1N, and at different rotation angles of the manual aperture adjustment ring 503, the conductive brush 505 connects one of the 21 rectangular pads 5043 and the sliding pad 5042, forming 21 resistance values ​​(100Ω-2100Ω, step 100Ω).

[0058] When the corresponding resistance value of the corresponding elastic feedback data is obtained, the main circuit board 700 will determine the aperture value of the lens currently required by the user according to the preset program, and output a driving step signal to the second driver 602 to achieve the aperture size change of the lens to meet the optical requirements, thereby achieving the function of manually controlling the aperture size.

[0059] It should be noted that the driving steps of the second driver 602, the aperture ring rotation angle, and the resistance value corresponding to the aperture value are shown in Table 2 below:

[0060] Table 2 As shown in Table 2 above, the lens manual aperture adjustment mechanism 500 is designed with 21 gears. The 21st automatic gear is where the camera provides aperture adjustment instructions according to a preset program. Gears 1 to 19 are manual adjustment gears where the user adjusts the lens aperture size. There are 20 transition gears between the automatic and manual gears to ensure stability and safety during the automatic / manual mode switching process.

[0061] In some preferred embodiments, see Figure 13 As shown, the composite adjustment device also includes a lens mount 102, a contact cable 701 having multiple metal contacts 5051, and a contact circuit board 702 connected to the contact cable 701, wherein the lens mount 102 is provided on the fixed lens, the lens mount 102 is used to connect to the camera, and the contact circuit board 702 is used to connect to the main circuit board 700.

[0062] Specifically, the contact cable 701 is designed with several metal contact structures with conductive functions; the contact cable 701 is installed and fixed on the lens mount 102. After the lens mount 102 and the camera are connected, the contact cable 701 and the contact connection on the camera can meet the signal transmission between the lens and the camera and provide power to the lens.

[0063] In some other preferred embodiments, the lens further includes a front fixed pressure cover 103 and a rear fixed ring 104 for assembling on the fixed lens barrel 100 .

[0064] In summary, the composite adjustment device for a photographic lens provided by the present invention has at least the following effective effects compared to the prior art methods for adjusting the focus and aperture of a lens: In a composite adjustment device for a photographic lens provided by the present invention, the lens includes a fixed lens barrel 100 and an optical lens barrel group 200, and the composite adjustment device includes a manual focus adjustment mechanism 300, an automatic focus 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 fence structure 301 and the corresponding photoelectric coupling switch, the main circuit board 700 can control the automatic focus mechanism 400 to be turned on or off according to the rotation angle signal, thereby achieving micron-level precision automatic focus. When making adjustments, the elastic trigger member 501 and the corresponding positioning structure 502 are used to generate corresponding elastic force feedback data, and the contact 5051 and the corresponding pad on the manual aperture circuit board 504 are triggered to generate a corresponding resistance value. Combined with the corresponding resistance value and the corresponding elastic force 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. Through this setting, the problems of insufficient accuracy and poor operation feedback in the single adjustment mode of the traditional lens can be solved, and the manual control experience is improved while maintaining the accuracy of electric control. It is particularly suitable for professional photography and film and television shooting.

[0065] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0066] The above embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A composite adjustment device for a photographic lens, wherein the lens comprises a fixed lens barrel and an optical lens barrel assembly, characterized in that: The composite adjustment device includes a manual focus adjustment mechanism, an automatic focus mechanism, a manual aperture adjustment mechanism, an automatic aperture mechanism, a main circuit board and a guide rod group; The autofocus mechanism is used to drive the optical lens barrel assembly to reciprocate along an axial direction parallel to the guide rod assembly to adjust the focus of the optical lens barrel assembly, wherein the autofocus mechanism includes a plurality of photoelectric coupling switches electrically connected to the main circuit board; The manual focus adjustment mechanism includes a manual focus adjustment ring having a fence structure, the manual focus adjustment ring being rotatably connected to the fixed lens barrel, the fence structure being opposite to at least two of the photoelectric coupling switches, and when the manual focus ring rotates relative to the fixed lens barrel, the photoelectric coupling switches are configured to detect a rotation angle signal between the fence structure and the corresponding photoelectric coupling switches, so that the main circuit board controls the automatic focus mechanism to be turned on or off according to the rotation angle signal; The manual aperture adjustment mechanism includes an elastic trigger member provided on the fixed lens barrel, a manual aperture adjustment ring having multiple groups of 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; Among them, multiple groups of the positioning structures are arranged opposite to the elastic triggering members, and the contacts of the conductive brushes are in contact with the manual aperture circuit board. When the manual aperture adjustment ring rotates relative to the fixed lens barrel, the elastic triggering members and the corresponding positioning structures generate corresponding elastic force feedback data, and the contacts are triggered by the corresponding pads on the manual aperture circuit board and generate corresponding resistance values. Through the corresponding resistance values ​​and the corresponding elastic force 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.

2. The composite adjustment device for a photographic lens according to claim 1, characterized in that: The guide rod group includes a main guide rod and a secondary guide rod. The optical lens barrel group 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 size 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 in the fixed lens barrel.

3. The composite adjustment device for a photographic lens according to claim 1, characterized in that: The autofocus mechanism further includes a focus 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 member is transmission-connected to the transmission screw, and the moving member is connected to the slider. The first driver is used to drive the transmission screw to rotate, so that the moving member reciprocates along the direction of the transmission screw, so that the slider adjusts the focus of the optical lens tube assembly. Wherein, the first driver is electrically connected to the main circuit board through the focusing circuit board.

4. The composite adjustment device for a photographic lens according to claim 3, characterized in that: The plurality of photoelectric coupling switches include a first photoelectric coupling switch, a second photoelectric coupling switch, and a third photoelectric coupling switch electrically connected to the focus circuit board; Any two of the first photoelectric coupling switch, the second photoelectric coupling switch and the third photoelectric coupling switch are opposite to the fence structure, and the other one is fixed in the fixed lens barrel.

5. The composite adjustment device for a photographic lens according to claim 4, characterized in that: The autofocus mechanism further includes a stopper connected to the optical lens barrel assembly; The first photoelectric coupling switch and the second photoelectric coupling switch are opposite to the fence structure, and the third photoelectric coupling switch is opposite to the moving path of the block, so that when the optical lens barrel assembly is adjusting the focus, a photoelectric shielding signal is generated between the block and the third photoelectric coupling switch, so that the main circuit board resets the driving information of the first driver according to the photoelectric shielding signal.

6. The composite adjustment device for a photographic lens according to claim 4, characterized in that: The center distance between the first photoelectric coupling switch and the second photoelectric coupling switch is D, and the center distance between the fence structure is E; Wherein, D=(n-1)E+0.25E, and n is the number of barriers between the first photoelectric coupling switch and the second photoelectric coupling 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 electrically connected to the main circuit board, a second driver and a fourth photoelectric coupling switch; The second driver is used to adjust the aperture blades to form different apertures, and the fourth photoelectric coupling switch is used to calibrate the driving information of the second driver according to the maximum aperture.

8. The composite adjustment device for a photographic lens according to claim 1, characterized in that: The manual aperture circuit board includes a plurality of chip resistors, a sliding pad and a plurality of rectangular pads arranged opposite to each other, and each of the chip resistors is connected in parallel with each of the rectangular pads; 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 of the contacts connects the corresponding rectangular pad and the sliding pad to generate a corresponding resistance value.

9. The composite adjustment device for a photographic lens according to claim 1, characterized in that: The moving member is detachably connected to the slider, and a dovetail groove connection structure is formed between the moving member and the slider.

10. The composite adjustment device for a photographic lens according to claim 1, characterized in that: The composite adjustment device further includes a lens mount, a contact cable having a plurality of metal contacts, and a contact circuit board connected to the contact cable; Wherein, the lens mount is provided on the fixed lens, the lens mount is used to be connected to the camera, and the contact circuit board is used to be connected to the main circuit board.

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