Detachable connecting device for camera equipment and accessory

Abstract

The invention discloses a camera equipment and accessory detachable connecting device which comprises camera equipment and an accessory, an accessory fixed connection male connector and a camera equipment fixed connection female connector, the male connector is provided with a male clamping ring, a positioning pin, a limiting column and an accessory signal contact, and the female connector is provided with a female clamping ring, a floating block, a camera equipment signal contact and a release button. The male connector can do 0-48-degree circumferential rotation relative to the female connector, a positioning pin is matched with a hole groove of the female clamping ring to achieve rotation stopping and enable signal contacts to be in accurate butt joint, clamping jaw buckling achieves axial limiting, and a release button is pressed to jack up the positioning pin through a floating block to relieve rotation stopping. The camera equipment is provided with an elastic anti-backlash structure with an annular gap to compensate for an axial gap; the accessory integrates a distance measuring function and an electronic ND mirror function; according to the invention, the accessory can be held by one hand to be quickly disassembled and assembled, the wear resistance and stability of the locking structure are enhanced, signal transmission interruption is avoided, the focusing precision and shooting convenience are improved, meanwhile, equipment damage during disassembly and assembly is prevented, and the service life of the device is prolonged.

Description

Technical Field

[0001] This invention belongs to the technical field of camera equipment, and relates to a detachable connection device for camera equipment and accessories. Background Technology

[0002] Amateur and professional photographers have placed higher demands on the efficiency of assembling and disassembling video equipment, the stability of connections, and the integration of functions. Traditional connection devices for video equipment and accessories have the following problems: 1) The locking structure uses a circular column and an elliptical waist hole for locking. Long-term use can easily cause wear and gaps, resulting in misalignment of communication contacts and loss of signal. 2) The disassembly and assembly of accessories require the cooperation of both hands, and the switching time is relatively long, which cannot meet the needs of snapshot. 3) Focusing relies on contrast or phase imaging modes, which results in slow focusing speed and a tendency for inaccurate images; 4) Frequent filter changes are required when shooting special scenes, making it a heavy burden to carry and store; 5) The axial clearance between the accessories and the camera equipment lacks a dedicated clearance-eliminating structure, affecting the reliability of the connection; 6) Without precise rotation limit design, the equipment is easily damaged due to excessive rotation during disassembly and assembly.

[0003] Existing patents related to camera equipment accessories only address single connection issues and do not form an integrated solution encompassing "mechanical connection, locking and limiting, signal transmission, and functional integration." Consequently, they cannot simultaneously meet the needs for quick assembly and disassembly, stable locking, reliable communication, precise focusing, and convenient shooting. Therefore, in order to solve the aforementioned technical problems, the technical solution of this application has been developed. Summary of the Invention

[0004] The purpose of this invention is to provide a detachable connection device for camera equipment and accessories, enabling quick assembly and disassembly of accessories with one-handed grip, enhancing the wear resistance and stability of the locking structure, preventing signal transmission interruption, and integrating accessory ranging and electronic ND filter control functions to improve the shooting performance and ease of operation of the camera equipment.

[0005] The technical solution adopted in this invention is as follows: A detachable connection device for a camera device and accessories includes a camera device and accessories. The accessories are fixedly connected to a male connector, and the camera device is fixedly connected to a female connector. The male and female connectors are matingly connected. The male connector consists of a male retaining ring, a positioning pin, a limit post, accessory signal contacts, and a positioning pin reset component. The female connector consists of a female retaining ring, a floating block, camera device signal contacts, a release button, and a reset spring. The male connector can rotate 0~48° circumferentially relative to the female connector along its axis, or the female connector can rotate 0~48° circumferentially relative to the male connector along its axis. Both the male and female connectors complete a total circumferential rotation of 0~48° along the axis. The limiting post limits the rotation angle, and the groove of the female retaining ring cooperates with the positioning pin to prevent rotation, while ensuring that the signal contacts correspond one-to-one. The claws of the male and female retaining rings engage to achieve axial positioning. Pressing the release button squeezes the wedge-shaped surface of the floating block through the wedge-shaped surface, lifting the positioning pin out of the groove and releasing the anti-rotation function. The camera equipment has an elastic gap-eliminating structure with an annular notch to compensate for the axial fit gap. The accessory integrates ranging and electronic ND lens functions, and realizes signal interaction with the camera equipment through dedicated signal contacts.

[0006] Furthermore, the positioning pin is designed with a protrusion and the slot is designed with a recess, and the size and shape of the positioning pin match the size and shape of the slot, so that the positioning pin and the slot can be engaged.

[0007] Furthermore, both the locating pin and the slot are square. The combination of the square locating pin and the square slot increases the contact area, improves wear resistance, completely solves the gap problem of traditional structures, and avoids signal misalignment.

[0008] Furthermore, the male retaining ring has three jaws. With the center of the locating pin as the reference, the center angle of the first jaw is 83.9° and the width angle is 51°, the center angle of the second jaw is 171.1° and the width angle is 52°, and the center angle of the third jaw is 69.8° and the width angle is 59°. The jaw angle parameters of the female retaining ring and the male retaining ring are completely matched.

[0009] Furthermore, the male connector also includes a positioning pin reset component, which is installed on the male retaining ring and connected to the positioning pin. The positioning pin reset component is an elastic part, which can keep the positioning pin in the ejected state at all times.

[0010] Furthermore, a reset hole is provided inside the release button, and a reset spring is provided between the reset hole and the camera device. The reset spring keeps the release button in the pop-out state. A wedge-shaped surface is provided at the front end of the release button, and a matching wedge-shaped surface is provided at the contact point between the floating block and the release button. During the inward movement of the release button, it squeezes the floating block to move upward.

[0011] Furthermore, taking the center of the positioning pin as a reference, its angle with the center of the first contact of the accessory signal contact is 66.9°, and its angle with the center of the last contact of the accessory signal contact is 129.7°; the angle between the center of the slot and the center of the first contact of the camera equipment signal contact is 66.9°, and its angle with the center of the last contact of the camera equipment signal contact is 129.7°.

[0012] Furthermore, the camera device also includes a gap-eliminating structure, which is an annular elastic element with a notch. At least three arc-shaped elastic blocks are provided on the elastic element, which can compensate for the axial fit gap between the camera device and the accessories.

[0013] Furthermore, the female retaining ring has a limiting notch with an angle of 57°, so that the actual relative rotation angle between the male and female connectors is 0~48°; the angle between the center of the locating pin and the center of the limiting post is 110.3°.

[0014] Furthermore, the accessory has a built-in chip storage and a distance sensor. After the accessory's signal contact is connected to the camera device's signal contact, the distance sensor reports the focus distance data to the camera device through the DIO contact data channel, thus realizing the accessory's distance measurement function.

[0015] Furthermore, the accessory integrates an electronic ND filter, and the camera device transmits voltage regulation control signals to the accessory through the IS_PWR / ND contact. The real-time data of the electronic ND filter is reported to the camera device through the DIO contact data channel.

[0016] Furthermore, the functions of the accessory signal contacts and the camera equipment signal contacts are defined as follows: VDD provides power to the active components of the accessory, DGND provides a reference ground for the digital control circuit, PGND provides a return path for the drive motor, CLK is the serial communication synchronization clock, DIO is for data communication transmission, LENS_CHECK is for accessory identification, Focus_D+ / D- is for focusing motor drive, Iris_D+ / D- is for aperture motor drive, and IS_PWR / ND is for custom control.

[0017] The working principle of this invention consists of five core components: assembly and positioning, locking and signal connection, gap elimination and reinforcement, disassembly and unlocking, and functional integration and control. Each component works in tandem to achieve the overall function of the device. Assembly and positioning: The only assembly direction is to align the male connector assembly mark with the female connector assembly mark to achieve precise positioning of the male connector. The 0~48° rotation limit ensures the controllability of the assembly process and prevents excessive rotation from damaging the equipment. Locking and signal connection: During the rotation of the male connector, the signal contacts of the accessory and the signal contacts of the camera equipment are precisely aligned one by one. The positioning pin is inserted into the hole groove to achieve mechanical anti-rotation, and at the same time, the final precise matching of the signal contacts is completed. The pawl engages to achieve axial limit, forming an integrated linkage of "mechanical positioning - signal connection - axial locking". Gap Elimination and Reinforcement: The elastic gap elimination structure of the annular notch compensates for the axial fit gap between the accessories and the camera equipment through the elastic deformation of the arc-shaped elastic block, avoiding radial displacement and shaking during use, and ensuring continuous and accurate connection of the signal contacts. Disassembly and unlocking: Pressing the release button converts linear motion into vertical displacement of the floating block through mechanical transmission of the wedge surface, lifting the positioning pin out of the slot, releasing the mechanical anti-rotation, and rotating in the opposite direction can disassemble the parts. At the same time, the signal contacts are disengaged one by one to avoid contact damage caused by force pulling. Functional integrated control: After the signal contacts are connected, the camera equipment and accessories can achieve power supply, data synchronization and command transmission through dedicated contacts. Real-time data from the range sensor and electronic ND lens are reported through the DIO channel. The camera equipment sends control signals to achieve range measurement, focusing and optical performance adjustment of the ND lens, forming a signal closed loop of "connection-power supply-communication-control".

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. A detachable connection device for camera equipment and accessories, which enables single-handed handling and disassembly of accessories while the camera equipment is fixed, eliminating the need for two-handed operation, reducing accessory switching time by more than 80%, and meeting the needs of snapshot capture; 2. In this invention, the cooperation between the square positioning pin and the slot increases the contact area, improves wear resistance, completely solves the gap problem of traditional structures, and avoids signal misalignment; 3. In this invention, the dual positioning of the claw and the positioning pin ensures precise docking of the signal contacts, and the differential drive contact design enhances anti-interference capability, ensuring no loss of communication and control signals; 4. In this invention, the ranging function of the accessory provides real-time feedback of the focusing distance data through the ranging sensor, thereby achieving fast and accurate focusing and solving the problems of slow focusing and inaccurate imaging in traditional focusing modes. 5. In this invention, an electronic ND filter control function is integrated, eliminating the need to replace physical filters. The optical performance is adjusted in real time through voltage regulation, reducing the burden of carrying and storing the filter. 6. In this invention, the precise rotation limit of 0~48° prevents excessive rotation during disassembly and assembly, protecting the equipment from damage. The gap-free structure makes the connection more reliable and avoids radial displacement during use. 7. In this invention, the parametric design of each structure makes the fit more precise, reduces the wear rate of the chuck and positioning pin by 90%, and extends the service life of the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments, experimental examples, and comparative examples will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the overall assembled structure of the present invention; Figure 2 This is a structural diagram showing the disassembled components of the present invention and the camera device; Figure 3 This is a schematic diagram of the disassembled female connector of the present invention; Figure 4 This is a schematic diagram of the angle structure of the female connector of the present invention (showing the assembly markings of the female connector). Figure 5 This is a schematic diagram of the disassembled male connector of the present invention; Figure 6 This is a schematic diagram of the angle structure of the male connector of the present invention (showing the assembly markings of the male connector); Figure 7 This is a schematic diagram of the angle structure of the positioning pin and the accessory signal contact of the present invention; Figure 8 This is a schematic diagram of the positioning pin of the present invention; Figure 9 yes Figure 8 A sectional view; Figure 10 yes Figure 9 Enlarged structural diagram (showing the specific structure of one type of locating pin reset component); Figure 11 Yes, it is. Figure 9 Enlarged structural diagram (showing the specific structure of another positioning pin reset component); Figure 12 This is a schematic diagram of the release button of the present invention; Figure 13 yes Figure 12 A sectional view; Figure 14 yes Figure 13 Enlarged structural diagram; Figure 15 This is a schematic diagram of the structure of the accessory signal contact and the camera device contact in this invention. Reference numerals: 1-Camera equipment, 2-Accessory, 3-Male retaining ring, 4-Positioning pin, 5-Limiting post, 6-Accessory signal contact, 7-Female retaining ring, 8-Floating block, 9-Camera equipment signal contact, 10-Release button, 11-Groove, 12-Claw, 13-Positioning pin reset component, 14-Reset hole, 15-Reset spring, 16-Wedge surface, 17-Elastic component, 18-Arc-shaped elastic block, 19-Limiting notch. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings, embodiments, experimental examples, and comparative examples. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0024] I. Implementation Examples Example 1

[0025] This invention provides a detachable connection device for camera equipment and accessories, such as... Figures 1-15 As shown, it includes a camera device 1 and an accessory 2. The accessory 2 is fixedly connected to a male connector, and the camera device 1 is fixedly connected to a female connector. The male connector and the female connector are matched and connected. The male connector includes a male retaining ring 3, a positioning pin 4, a limit post 5, and accessory signal contacts 6; the female connector includes a female retaining ring 7, a floating block 8, a camera equipment signal contact 9, and a release button 10. The male connector rotates 0 to 48 degrees relative to the female connector along the axis of the camera device 1 and accessory 2, and the limiting post 5 limits the relative rotatable angle between the male connector and the female connector. The female retaining ring 7 has a slot 11 that matches the positioning pin 4. When the positioning pin 4 matches the slot 11, the camera device 1 and the accessory 2 stop rotating, and the signal contact 9 of the camera device corresponds one-to-one with the signal contact 6 of the accessory. Both the male retaining ring 3 and the female retaining ring 7 have matching claws 12, which achieve axial positioning of the camera device 1 and the accessory 2 by fastening. Pressing the release button 10 can drive the floating block 8 to move, and the floating block 8 will lift the positioning pin 4 to disengage from the slot 11, thus releasing the anti-rotation constraint of the camera device 1 and the accessory 2.

[0026] The male retaining ring 3 has three jaws 12. With the center of the positioning pin 4 as the reference, the center angle of the first jaw is 83.9° and the width angle is 51°, the center angle of the second jaw is 171.1° and the width angle is 52°, and the center angle of the third jaw is 69.8° and the width angle is 59°. The angle parameters of the jaws 12 of the female retaining ring 7 and the jaws 12 of the male retaining ring 3 are completely matched.

[0027] The male connector also includes a positioning pin reset component 13, which is installed on the male retaining ring 3 and connected to the positioning pin 4. The positioning pin reset component 13 is an elastic part, which can keep the positioning pin 4 in the ejected state at all times.

[0028] The release button 10 has a reset hole 14 inside. A reset spring 15 is provided between the reset hole 14 and the camera device 1. The reset spring 15 keeps the release button 10 in the pop-out state. The front end of the release button 10 has a wedge-shaped surface 16. The floating block 8 and the release button 10 have a matching wedge-shaped surface 16 at the contact point. When the release button 10 moves inward, it squeezes the floating block 8 to move upward.

[0029] With the center of the positioning pin 4 as the reference, the angle between it and the center of the first contact of the accessory signal contact 6 is 66.9°, and the angle between it and the center of the last contact of the accessory signal contact 6 is 129.7°; the angle between the center of the slot 11 and the center of the first contact of the camera equipment signal contact 9 is 66.9°, and the angle between it and the center of the last contact of the camera equipment signal contact 9 is 129.7°.

[0030] The camera device 1 also includes a gap-eliminating structure, which is an annular elastic element 17 with a notch. At least three arc-shaped elastic blocks 18 are provided on the elastic element 17. The arc-shaped elastic blocks 18 can compensate for the axial fit gap between the camera device 1 and the accessory 2.

[0031] The female retaining ring 7 has a limiting notch 19 with an angle of 57°, so that the actual relative rotation angle between the male and female connectors is 0~48°; the angle between the center of the locating pin 4 and the center of the limiting post 5 is 110.3°.

[0032] Accessory 2 has a built-in chip storage and a distance sensor. After the accessory signal contact 6 is connected to the camera device signal contact 9, the distance sensor will report the focus distance data to the camera device 1 through the DIO contact data channel, thus realizing the distance measurement function of accessory 2.

[0033] Accessory 2 integrates an electronic ND filter. Camera device 1 transmits voltage regulation control signals to accessory 2 through the IS_PWR / ND contact. Real-time data from the electronic ND filter is reported to camera device 1 through the DIO contact data channel.

[0034] The functions of accessory signal contact 6 and camera equipment signal contact 9 are defined as follows: VDD provides power to the active components of the accessory, DGND provides a reference ground for the digital control circuit, PGND provides a return path for the drive motor, CLK is the serial communication synchronization clock, DIO is for data communication transmission, LENS_CHECK is for accessory identification, Focus_D+ / D- is for focusing motor drive, Iris_D+ / D- is for aperture motor drive, and IS_PWR / ND is for custom control.

[0035] The specific implementation of this embodiment is a basic connection device between the camera equipment and the lens accessories, which meets the requirements of quick assembly and disassembly, stable locking and basic signal transmission. The test data of the corresponding experimental example 1 has fully verified the technical effect of this embodiment.

[0036] Structural components: The female connector of the camera equipment includes a female retaining ring, a floating block, camera equipment signal contacts, a release button, and a return spring. The female retaining ring has a 57° limiting notch and a slot, and three matching claws are provided on the inner side. The male connector of the accessory includes a male retaining ring, a positioning pin, a limiting post, accessory signal contacts, and a positioning pin reset component. The male retaining ring has three claws at specific angles, and the positioning pin reset component is a spring, which keeps the positioning pin always protruding. The camera equipment has an elastic gap-eliminating structure with an annular notch, and three arc-shaped elastic blocks are provided on the elastic component.

[0037] Assembly process: Align the assembly markings of the male connector with those of the female connector, insert the male retaining ring into the female retaining ring along the axis, hold the parts with one hand and rotate them clockwise from 0 to 48 degrees. During the rotation, the signal contacts of the parts will align with the signal contacts of the camera equipment one by one. When the positioning pin rotates to the slot position, it will be engaged in the slot under the elastic force of the reset part to stop the rotation. At the same time, the limiting post will reach the limit point of the female retaining ring's claws, and the claws will engage to achieve axial limiting, completing the assembly. The arc-shaped elastic block of the gap-eliminating structure deforms elastically to compensate for the axial fit gap L0, making the connection wobble-free.

[0038] Disassembly process: Hold the component with one hand, press the release button with your right index finger or left thumb to overcome the spring force of the reset spring and move the release button inward. The wedge-shaped surface at the front end squeezes the floating block upward. The pushing force of the floating block is greater than the spring force of the positioning pin reset part and the friction between the positioning pin and the hole groove, pushing the positioning pin out of the hole groove and releasing the anti-rotation. Hold the component and rotate it counterclockwise from 0 to 48 degrees. The signal contacts will disengage one by one. When the limit post returns to the female connector mark, pull the component out along the axis to complete the disassembly.

[0039] Working effect: This embodiment enables lens accessories to be disassembled and assembled with one hand, with a disassembly and assembly time of ≤2s. The locking structure is gapless, the signal contact is accurately connected, there is no communication interruption, and the gap-eliminating structure ensures that the accessories do not wobble axially and there is no radial displacement during use.

[0040] Example 2

[0041] This invention provides a detachable connection device for camera equipment and accessories, such as... Figures 1-15 As shown, the specific implementation method of this embodiment is as follows: based on embodiment 1, the accessory has a built-in chip storage and a ranging sensor, corresponding to the structural scheme of experimental example 2.

[0042] The chip memory stores the initial calibration data of the accessory, and the range sensor detects the focus distance data from the target to the camera sensor in real time. After the accessory signal contact is connected to the camera device signal contact, the range sensor reports the focus distance data to the camera device through the DIO contact data channel. The camera device sends a differential drive signal through the Focus_D+ / D- contact to control the focus motor to drive the focus element to the designated position, thus achieving automatic focusing. The focusing speed of this embodiment is 90% faster than that of traditional camera devices, and the focus error of the subject is 1mm. It solves the problems of slow focusing and inaccurate imaging in traditional focusing modes. Its performance has been verified by the quantitative data of Experiment Example 2.

[0043] Example 3

[0044] This invention provides a detachable connection device for camera equipment and accessories, such as... Figures 1-15 As shown, the specific implementation method of this embodiment is as follows: based on embodiment 2, an electronic ND mirror is integrated into the accessory, corresponding to the structural scheme of experimental example 3.

[0045] The camera device transmits voltage adjustment control signals to the accessory via the IS_PWR / ND contact, changing the power supply voltage of the electronic ND filter and thus adjusting its optical density and refractive light transmission performance in real time. The real-time operating data of the electronic ND filter is reported to the camera device via the DIO contact data channel. The camera device automatically adjusts the control signal based on the real-time monitoring image, achieving precise control of the light transmission. This embodiment eliminates the need to replace the physical ND filter, enabling 0-10 levels of light transmission adjustment with a response time ≤0.5s. It is suitable for special shooting scenarios such as strong light and backlighting. Test data verifies that its adjustment stability and response speed are superior to existing physical filter switching methods.

[0046] Example 4

[0047] This invention provides a detachable connection device for camera equipment and accessories, such as... Figures 1-15 As shown, the specific implementation method of this embodiment is as follows: based on embodiment 3, the signal contact is optimized and designed, which is an extension of the differential drive design of experimental example 3.

[0048] By separating DGND and PGND, DGND provides a reference ground for digital control circuits such as the MCU and encoder, while PGND provides a return path for high-current drive components such as the focus motor and aperture motor, thus avoiding interference of drive noise on digital signals. Both Focus_D+ / D- and Iris_D+ / D- use differential drive signal transmission, which improves the electromagnetic interference resistance by 80% and can still ensure the stability of signal transmission in complex electromagnetic environments. The low bit error rate of 0.08% in Experiment 3 fully verifies its anti-interference effect.

[0049] Example 5

[0050] This invention provides a detachable connection device for camera equipment and accessories, such as... Figures 1-15 As shown, the specific implementation method of this embodiment is as follows: Based on embodiment 4, the structure of retaining ring, positioning pin, limiting post and other structures is designed to be lightweight, and high-strength aluminum alloy material is used to replace traditional stainless steel material, corresponding to the material optimization scheme of experimental example 4.

[0051] The overall weight of the device is reduced by 30% while maintaining structural strength and wear resistance. The elastic components of the gap-free structure are made of titanium alloy, which has better elastic deformation performance and increases service life by 50%, making it suitable for portable camera equipment. The salt spray test and high and low temperature test data in Experiment Example 4 prove that the lightweight design does not reduce the weather resistance and durability of the device; on the contrary, the overall service life is improved through material optimization.

[0052] II. Comparative Example Comparison Example 1: Traditional round locking + two-hand disassembly / reassembly solution

[0053] 1. Structural composition: It adopts a circular columnar locking pin and an elliptical waist hole, without a positioning post or gap-free structure. It requires two hands to disassemble and assemble (one hand to fix the camera equipment and press the lens release lever, and the other hand to rotate the accessories). It has no rangefinding or electronic ND filter function, and the signal contacts are single-ended driven.

[0054] 2. Test conditions: ambient temperature (25℃), continuous disassembly and assembly 1000 times, simulating signal transmission in daily shooting scenarios (transmission data includes lens parameters and focus commands), salt spray test for 72 hours (to verify wear and corrosion resistance), and mechanical shock test (acceleration 5g, pulse width 11ms, XYZ axis).

[0055] 3. Test Results: Single disassembly / reassembly time: 12.8s; Locking gap: 0.32mm after 1000 disassembly / reassembly cycles; Signal error rate: 2.1%; Locking structure wear: 0.15mm after salt spray test; Wear resistance life: 3000 cycles; Signal contact point offset occurred after mechanical shock test, communication interruption rate: 15%; No rangefinding function, using traditional phase focusing, focus error of the subject in strong light: 15mm, focus error of the subject in low light: 22mm; No electronic ND filter function.

[0056] Comparative Example 2: Existing square locking + gapless solution

[0057] 1. Structural composition: It adopts square positioning pins and square hole slots for locking, without annular notch elastic gap elimination structure, without precise rotation limit (rotation angle 0~60°), requires two hands to disassemble and assemble, without distance measuring and electronic ND mirror functions, and the signal contacts are single-end drive design.

[0058] 2. Test conditions: Same as control group 1.

[0059] 3. Test Results: Single disassembly / reassembly time: 10.5s; Locking gap: 0.18mm after 1000 disassembly / reassembly cycles; Signal error rate: 1.3%; Locking structure wear: 0.08mm after salt spray test; Wear resistance life: 6000 cycles; Communication interruption rate: 8% after mechanical shock test; No rangefinder function; Focus error of the subject in strong light: 12mm; Focus error of the subject in low light: 18mm; No electronic ND filter function.

[0060] Comparative Example 3: Basic square locking mechanism + non-functional integrated solution

[0061] 1. Structural composition: It adopts the square positioning pin + limiting post (0~48° rotation) of the present invention, with an annular notch gap elimination structure, which can be disassembled and assembled with one hand. It has no distance measuring and electronic ND lens functions, and the signal contacts are differentially driven.

[0062] 2. Test conditions: Same as control group 1.

[0063] 3. Test Results: Single disassembly / reassembly time: 1.8s; Locking gap: 0.02mm after 1000 disassembly / reassembly cycles; Signal error rate: 0.2%; Locking structure wear: 0.03mm after salt spray test; Wear resistance life: 18000 cycles; Communication interruption rate: 1% after mechanical shock test; No rangefinder function; Focus error of the subject in strong light: 8mm; Focus error of the subject in low light: 11mm; No electronic ND filter function.

[0064] III. Experimental Examples Experimental Example 1: Basic Model (One-handed grip + square locking + gap-free structure)

[0065] 1. Structural composition: The basic detachable connection device corresponding to the complete embodiment 1 of the present invention includes a male connector (male retaining ring, square positioning pin, limit post, accessory signal contact), a female connector (female retaining ring, floating block, camera equipment signal contact, release button), and an annular notch elastic gap elimination structure (3 arc-shaped elastic blocks). The signal contact is a differential drive design and has no ranging and electronic ND lens functions.

[0066] 2. Test conditions: Same as comparative example 1, with the addition of vibration test (frequency 10~50Hz, amplitude 0.5mm) to verify connection stability.

[0067] 3. Test Results: Single disassembly / assembly time: 1.5s; Locking gap: 0.01mm after 1000 disassembly / assembly cycles; Signal error rate: 0.1%; Locking structure wear: 0.02mm after salt spray test, wear resistance life: 20000 cycles; Communication interruption rate: 0.5% after mechanical shock test; No radial displacement during vibration test, signal transmission is stable; No ranging function; Focus error of the subject in strong light: 6mm; Focus error of the subject in low light: 9mm; No electronic ND filter function.

[0068] Experiment Example 2: Advanced Model (Basic Model + Distance Measurement Function)

[0069] 1. Structural Composition: Based on Experiment 1, an accessory chip memory and a range sensor are added. Range measurement data transmission is achieved through DIO contacts. Other structures are consistent with Experiment 1. The focusing performance is verified using the test card method and the real-world scenario testing method. A standard 24-color focusing test card is selected and placed at a distance of 1.5m.

[0070] 2. Test conditions: Same as in Experiment 1, but with the addition of focus tests under different lighting conditions (strong light / weak light / backlight) to measure focus completion time and accuracy.

[0071] 3. Test results: Single disassembly / reassembly time 1.6s; locking gap 0.01mm after 1000 disassembly / reassembly cycles; signal error rate 0.08%; wear resistance life 20,000 cycles; stable mechanical shock and vibration test; focusing time 0.3s; focus error of the subject under strong light, low light, and backlight conditions 1mm, no difference in environmental adaptability; no electronic ND filter function.

[0072] Experimental Example 3: Full-featured model (advanced model + electronic ND filter function)

[0073] 1. Structural composition: Based on Experiment 2, an electronic ND mirror is integrated. The voltage adjustment signal is transmitted through the IS_PWR / ND contact, and the DIO contact reports real-time data. The density adjustment range of the electronic ND mirror is from ND0.3 to ND10.0 (1-33 levels), with 0.1 levels as the step unit. Other structures are the same as in Experiment 2.

[0074] 2. Test conditions: Same as in Experiment 2, but with the addition of ND filter adjustment tests under different light intensities to measure adjustment response time and optical density stability.

[0075] 3. Test Results: Single disassembly / assembly time: 1.7s; Locking gap after 1000 disassembly / assembly cycles: 0.01mm; Signal error rate: 0.08%; Wear resistance life: 20,000 cycles; Stable performance under mechanical shock and vibration tests; Focusing completion time: 0.3s; Focus error of the subject: 1mm; ND filter adjustment response time: 0.4s; Optical density adjustment stability error: ±0.02 levels; No performance degradation under different light intensities.

[0076] Experimental Example 4: High Weather Resistance Model (Multi-functional Model + Reinforced Material)

[0077] 1. Structural composition: Based on Experiment 3, the locating pin is made of 65Mn spring steel (quenched), the retaining ring is made of 316 stainless steel with Dacromet coating (coating thickness 8μm), the gap-eliminating elastic element is made of titanium alloy, and the other structures are the same as those in Experiment 3.

[0078] 2. Test conditions: The salt spray test is extended to 1000 hours, and disassembly and signal transmission tests are added under high temperature (60℃), low temperature (-40℃) and high humidity (95% relative humidity) conditions, with 5000 consecutive disassembly and assembly cycles.

[0079] 3. Test Results: No rust was observed after the salt spray test; the wear of the locking structure was 0.03 mm; the single disassembly and assembly time under high temperature, low temperature, and high humidity conditions was 1.8 s, and the signal error rate was 0.1%; the locking gap was 0.02 mm after 5000 disassembly and assembly cycles, and the wear resistance life was 35000 cycles; the focusing and ND filter adjustment functions were stable with no performance degradation; the communication interruption rate was 0.5% after the mechanical shock test.

[0080] Table 1 (Comparison of core data between experimental and comparative examples) Test Project Comparative Example 1 Comparative Example 2 Comparative Example 3 Experimental Example 1 Experimental Example 2 Experimental Example 3 Experiment Example 4 Single disassembly / assembly time (s) 12.8 10.5 1.8 1.5 1.6 1.7 1.8 Locking gap (mm) after 1000 cycles 0.32 0.18 0.02 0.01 0.01 0.01 0.01 Signal bit error rate (%) 2.1 1.3 0.2 0.1 0.08 0.08 0.1 Wear resistance life (times) 3000 6000 18000 20000 20000 20000 35000 Mechanical shock interruption rate (%) 15 8 1 0.5 0.5 0.5 0.5 Focusing accuracy error (mm) 15 (Strong light) 22 (Weak light) 12 (strong light) 18 (weak light) 8 (strong light) 11 (weak light) 6 (strong light) 9 (weak light) 1 (All Environments) 1 (All Environments) 1 (All Environments) ND filter adjustment response time (s) - - - - - 0.4 0.4 IV. Conclusion

[0081] 1. The single-handed grip assembly / disassembly structure of this invention reduces assembly / disassembly time by more than 88% compared to traditional solutions (1.5s vs 12.8s), solving the problem of accessory switching efficiency in snapshot scenarios; 2. The square locking + gap-eliminating structure controls the locking gap to within 0.01mm, the signal error rate is less than 0.1%, and the mechanical shock interruption rate is only 0.5%, which improves stability by more than 96% compared with the traditional circular locking solution; 3. The reinforced material provides a high weather resistance and a wear life of up to 35,000 cycles, which is more than 10 times that of traditional solutions. It also shows no rust after 1,000 hours of salt spray testing, making it suitable for harsh shooting environments. 4. The integrated rangefinding function adopts a rangefinding sensor + chip storage design, which reduces the focus error of the subject to 1mm and ensures stable performance in all lighting conditions, solving the problem of poor environmental adaptability of traditional focusing modes. 5. The electronic ND filter has a 0.4s adjustment response time, high optical density adjustment precision, and eliminates the need to replace physical filters, significantly improving shooting convenience. Experimental data fully demonstrates that this invention is significantly superior to existing technologies in terms of assembly / disassembly efficiency, connection stability, durability, and functional integration.

[0082] The above description is only a preferred embodiment, experimental example, and comparative example of the present invention, and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A detachable connection device for a camera device and accessories, comprising a camera device (1) and accessories (2), characterized in that, The accessory (2) is fixedly connected to a male connector, and the camera device (1) is fixedly connected to a female connector. The male connector and the female connector are matched and connected. The male connector includes a male retaining ring (3), a positioning pin (4), a limiting post (5), and a component signal contact (6); the female connector includes a female retaining ring (7), a floating block (8), a camera equipment signal contact (9), and a release button (10). The male connector rotates 0 to 48 degrees relative to the female connector along the axis of the camera device (1) and the accessory (2), and the limiting post (5) limits the relative rotatable angle between the male connector and the female connector. The female retaining ring (7) has a slot (11) that matches the positioning pin (4). When the positioning pin (4) is engaged with the slot (11), the camera device (1) and the accessory (2) stop rotating and the signal contact (9) of the camera device corresponds one-to-one with the signal contact (6) of the accessory. Both the male retaining ring (3) and the female retaining ring (7) have matching claws (12), and the claws (12) achieve axial positioning of the camera device (1) and the accessory (2) by fastening. Pressing the release button (10) can drive the floating block (8) to move, and the floating block (8) lifts the positioning pin (4) to disengage from the slot (11), thereby releasing the anti-rotation constraint between the camera device (1) and the accessory (2).

2. The detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The male retaining ring (3) has three jaws (12). With the center of the positioning pin (4) as the reference, the center angle of the first jaw is 83.9° and the width angle is 51°, the center angle of the second jaw is 171.1° and the width angle is 52°, and the center angle of the third jaw is 69.8° and the width angle is 59°. The angle parameters of the jaws (12) of the female retaining ring (7) and the jaws (12) of the male retaining ring (3) are completely matched.

3. The detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The male connector also includes a positioning pin reset component (13), which is installed on the male retaining ring (3) and connected to the positioning pin (4). The positioning pin reset component (13) is an elastic part, which can keep the positioning pin (4) in the ejected state at all times.

4. The detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The release button (10) has a reset hole (14) inside. A reset spring (15) is provided between the reset hole (14) and the camera device (1). The reset spring (15) keeps the release button (10) in the pop-out state. The front end of the release button (10) is provided with a wedge-shaped surface (16). The floating block (8) and the release button (10) are provided with a matching wedge-shaped surface (16). When the release button (10) moves inward, it squeezes the floating block (8) to move upward.

5. A detachable connection device for camera equipment and accessories according to claim 1, characterized in that, With the center of the positioning pin (4) as the reference, the angle between it and the center of the first contact of the accessory signal contact (6) is 66.9°, and the angle between it and the center of the last contact of the accessory signal contact (6) is 129.7°; the angle between the center of the slot (11) and the center of the first contact of the camera device signal contact (9) is 66.9°, and the angle between it and the center of the last contact of the camera device signal contact (9) is 129.7°.

6. A detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The camera device (1) also includes a gap-eliminating structure, which is an annular elastic element (17) with a notch. At least three arc-shaped elastic blocks (18) are provided on the elastic element (17), and the arc-shaped elastic blocks (18) can compensate for the axial fit gap between the camera device (1) and the accessory (2).

7. A detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The female retaining ring (7) has a limiting notch (19) with an angle of 57°, so that the actual relative rotation angle between the male connector and the female connector is 0~48°; the angle between the center of the positioning pin (4) and the center of the limiting post (5) is 110.3°.

8. A detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The accessory (2) has a built-in chip storage and a distance sensor. After the accessory signal contact (6) is connected to the camera device signal contact (9), the distance sensor reports the focus distance data to the camera device (1) through the DIO contact data channel, thereby realizing the distance measurement function of the accessory (2).

9. A detachable connection device for camera equipment and accessories according to claim 1, characterized in that, The accessory (2) integrates an electronic ND filter. The camera device (1) transmits a voltage regulation control signal to the accessory (2) through the IS_PWR / ND contact. The real-time data of the electronic ND filter is reported to the camera device (1) through the DIO contact data channel.

10. A detachable connection device for a camera device and accessories according to claim 1, characterized in that, The functions of the accessory signal contact (6) and the camera device signal contact (9) are defined as follows: VDD provides power to the active components of the accessory, DGND provides a reference ground for the digital control circuit, PGND provides a return path for the drive motor, CLK is the serial communication synchronization clock, DIO is the data communication transmission, LENS_CHECK is the accessory identification, Focus_D+ / D- is the focus motor drive, Iris_D+ / D- is the aperture motor drive, and IS_PWR / ND is the custom control.

Images