Pneumatic clamping device and visual inspection device

Abstract

The utility model belongs to the technical field of visual inspection, and discloses a pneumatic clamping device and a visual inspection device, the pneumatic clamping device is used for visual inspection of a middle frame of a consumer electronic product, the pneumatic clamping device is annularly arranged in the circumferential direction of the middle frame, the pneumatic clamping device comprises a first cavity and a second cavity, the first cavity is sleeved outside the second cavity, and the second cavity is in sliding connection with the first cavity; an air hole is formed in the end, away from the second cavity, of the first cavity and used for conveying compressed air into the first cavity. The second cavity comprises a flexible contact part and a connecting part, the connecting part is in sliding connection with the inner wall of the first cavity, the connecting part is provided with an isolating membrane, and air pressure in the first cavity rises to push the second cavity to slide so that the flexible contact part can make contact with the middle frame. The middle frame is accurately positioned from multiple angles, the positioning accuracy and stability are improved, the surface of the middle frame is prevented from being scratched by arranging the flexible contact part, the appearance quality of a product is improved, the universality and compatibility of the clamp are improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to visual inspection technical field relates to a kind of pneumatic clamping device and visual inspection device. BACKGROUND

[0002] In today's electronic manufacturing industry, a series of consumer electronic product midframes as important structural components of electronic products, its quality detection is crucial, with the continuous improvement of consumer quality requirements and the increasing refinement of manufacturing process, the detection accuracy and efficiency of size precision, appearance defect and other aspects of consumer electronic product midframe are challenged.

[0003] Traditional consumer electronic product midframe positioning method often relies on product hole, this method can cause unnecessary scratches and indentation on product surface, ultimately affect the pass rate of product in DDS three injury detection. And according to different consumer electronic product midframe structure characteristics, product needs to replace multiple sets of positioning fixture during burr defect detection process, and through multiple detection positions, seriously waste tool resources and human cost resources, and is not conducive to the improvement of detection CT time efficiency. In order to minimize the damage to the appearance of the midframe during clamping process, the existing clamping process generally uses the structure function hole on the product for positioning, but according to this detection process, at least two clamping processes are needed to complete all visual detection items when detecting internal structure defects of consumer electronic product midframe. In mass production batch detection link, the more the repeated clamping times, the more the original product structure features used, the more likely to cause scratching and indentation and other adverse production yield decline. At the same time, the processing CT time is long, and the processing efficiency is low.

[0004] Therefore, there is an urgent need in the art for a pneumatic clamping device and visual inspection device to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims to solve the above problems, provide a kind of pneumatic clamping device, for the visual inspection of consumer electronic product midframe, the pneumatic clamping device ring is set in the circumferential direction of consumer electronic product midframe, the pneumatic clamping device includes: first cavity and second cavity, the first cavity is sleeved in the second cavity outside, and the second cavity is slidably connected with the first cavity;

[0006] The first cavity is provided with a gas hole away from one end of the second cavity, and the gas hole is used to deliver compressed air into the first cavity;

[0007] The second cavity includes a flexible contact part and a connecting part, the connecting part is slidably connected with the inner wall of the first cavity, the connecting part is provided with a separation membrane, and the gas pressure in the first cavity is increased to push the second cavity to slide so that the flexible contact part is in contact with the consumer electronic product midframe.

[0008] As a further improvement of the utility model, the isolation film is provided with a valve hole, the valve hole comprises a boss part and an inner recess, and the boss part connects the isolation film and the inner recess.

[0009] As a further improvement of the utility model, a plurality of pressure relief holes are arranged at intervals in the flexible contact part.

[0010] As a further improvement of the utility model, the material of the flexible contact part is rubber.

[0011] As a further improvement of the utility model, the air hole comprises an air inlet hole and an air outlet hole, and the air inlet hole and the air outlet hole are both in communication with the first cavity.

[0012] As a further improvement of the utility model, the pneumatic clamping device further comprises an air inlet member and an air outlet member.

[0013] The air inlet member is provided with an air inlet channel, the air inlet member is threadedly connected with the air inlet hole, and the air inlet channel is in communication with the first cavity.

[0014] The air outlet member is provided with an air outlet channel, the air outlet member is threadedly connected with the air outlet hole, and the air outlet channel is in communication with the first cavity.

[0015] As a further improvement of the utility model, the pneumatic clamping device further comprises an air pressure feedback device, the air pressure feedback device is connected with the first cavity, and the air pressure feedback device is used for feeding back the air pressure threshold value of the first cavity.

[0016] The utility model also provides a visual detection device for the visual detection of a middle frame of a consumer electronic product, and the visual detection device comprises the above-mentioned pneumatic clamping device and a visual camera.

[0017] The visual camera is arranged at the upper end and the lower end of the middle frame of the consumer electronic product respectively.

[0018] As a further improvement of the utility model, the number of the pneumatic clamping devices is at least four.

[0019] The pneumatic clamping device comprises a first clamp, a second clamp, a third clamp and a fourth clamp.

[0020] The first clamp and the second clamp are oppositely arranged, and the first clamp or the second clamp corresponds to a first hole position of the middle frame of the consumer electronic product.

[0021] The third clamp and the fourth clamp are oppositely arranged, the third clamp corresponds to a second hole position of the middle frame of the consumer electronic product, and the fourth clamp corresponds to a third hole position of the middle frame of the consumer electronic product.

[0022] As a further improvement of the utility model, the visual camera is a CCD camera.

[0023] The technical effect of the utility model is: compared with the prior art, the utility model provides a pneumatic clamping device and a visual detection device, through the structure of being arranged around the circumference and the positioning mode under the driving of the air pressure, the pneumatic clamping device can accurately position the middle frame of the consumer electronic product from multiple angles, and the positioning accuracy and stability are effectively improved. By arranging the flexible contact part to contact the middle frame of the consumer electronic product, the positioning effect can be ensured by close adhesion, and damage such as scratching and knocking on the surface of the middle frame of the consumer electronic product can be avoided, and the product appearance quality is protected. Only by adjusting parameters such as air pressure size, the contact part can be flexibly matched with various middle frames of consumer electronic products and effectively positioned, without the need to specially design and replace complex mechanical clamps for different middle frames of consumer electronic products, the versatility and compatibility of the clamp on the production line are improved, the production cost and production preparation time are reduced. The whole detection process can be completed by one-time clamping, time waste and detection error accumulation caused by multiple clamping and adjustment in the traditional positioning mode are avoided, the cycle time of equipment detection is significantly reduced, and the detection efficiency of the whole visual detection system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only a part of the embodiments of the utility model, not all the embodiments, and for those skilled in the art, other drawings obtained according to these drawings without creative labor belong to the protection scope of the utility model.

[0025] Figure 1 It is a perspective view of the pneumatic clamping device provided by the utility model embodiment.

[0026] Figure 2 It is an exploded view of the pneumatic clamping device provided by the utility model embodiment.

[0027] Figure 3 It is a side view of the pneumatic clamping device provided by the utility model embodiment.

[0028] Figure 4 It is Figure 3 It is a sectional view at D-D.

[0029] Figure 5 It is a perspective view of the visual detection device provided by the utility model embodiment.

[0030] Wherein, 10 is a pneumatic clamping device, 11 is a first cavity, 111 is a gas hole, 1111 is an air inlet hole, 1112 is an air outlet hole, 112 is an air inlet piece, 1121 is an air inlet channel, 113 is an air outlet piece, 1131 is an air outlet channel, 12 is a second cavity, 121 is an elastic contact part, 1211 is a pressure relief hole, 122 is a connecting part, 1221 is a separation membrane, 1222 is a valve hole, 12221 is a boss part, 12222 is an inner recess, 13 is a gas pressure feedback device.

[0031] 101 is a first clamp, 102 is a second clamp, 103 is a third clamp, 104 is a fourth clamp, 20 is a visual camera, 30 is a consumer electronic product frame, 31 is a first hole position, 32 is a second hole position, 33 is a third hole position. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0033] In order to make the description of the present disclosure more detailed and complete, the following describes the embodiments of the utility model and specific examples; but this is not the only form of implementation or use of the specific embodiments of the utility model. The embodiments include the features of the specific embodiments and the method steps and order used to construct and operate these specific embodiments. However, other specific embodiments can also be used to achieve the same or equivalent functions and step sequences. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present utility model.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "first", "second" and the like in the specification and claims of the utility model and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0036] In the description of the utility model, the terms "front", "back", "top", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0037] Please refer to Figures 1-5 An embodiment of the utility model provides a kind of pneumatic clamping device and visual detection device, to solve the problem of existing consumer electronic product frame detection, need to replace multiple sets of positioning fixture, the more repeated clamping times, cause scratch and other adverse production yield decline problems.

[0038] Specifically, please refer to Figure 1 A kind of pneumatic clamping device perspective provided by the utility model embodiment, Figure 2 A kind of pneumatic clamping device of the utility model embodiment provides an exploded view, the utility model provides a kind of pneumatic clamping device 10, for the visual detection of consumer electronic product frame 30, the pneumatic clamping device 10 ring is set in the circumferential direction of consumer electronic product frame 30, the pneumatic clamping device 10 includes: first cavity 11 and second cavity 12, the first cavity 11 is set in the second cavity 12 outside, and the second cavity 12 is slidably connected with the first cavity 11.By setting pneumatic clamping device 10 as the cavity structure of sliding connection, first cavity 11 is set in the second cavity 12 outside, nested design provides basic structure for subsequent air pressure driving action.

[0039] Specifically, the first cavity 11 is provided with an air hole 111 at one end away from the second cavity 12, the air hole 111 is used to deliver compressed air into the first cavity 11; the second cavity 12 includes a flexible contact part 121 and a connecting part 122, the connecting part 122 is in sliding connection with the inner wall of the first cavity 11, the connecting part 122 is provided with a separation film 1221, the air pressure in the first cavity 11 pushes the second cavity 12 to slide to make the flexible contact part 121 contact the middle frame 30 of the consumer electronic product. By setting the air hole 111 at one end of the first cavity 11 away from the second cavity 12, the air hole 111 can input air pressure into the first cavity 11, and the air hole 111 becomes the entrance of the whole air pressure power introduction. The second cavity 12 is further subdivided into a flexible contact part 121 and a connecting part 122. The connecting part 122 is in sliding fit with the inner wall of the first cavity 11, so that the second cavity 12 can move relatively smoothly in the first cavity 11. The separation film 1221 provided on the connecting part 122 plays a key role in separating and transmitting force under the action of air pressure. When delivering compressed air into the first cavity 11 through the air hole 111, the air pressure in the first cavity 11 gradually rises. Due to the existence of the separation film 1221, the air pressure will generate a force on the second cavity 12, pushing the second cavity 12 to slide along the inner wall in the first cavity 11. With the sliding of the second cavity 12, its flexible contact part 121 gradually approaches and finally contacts the middle frame 30 of the consumer electronic product. In actual application, in the process of contact, the flexible contact part 121 will adaptively adjust according to the contour of the middle frame 30 of the consumer electronic product, so as to realize the positioning and fixing of the middle frame 30 of the consumer electronic product.

[0040] The pneumatic clamping device 10 provided by the embodiment can accurately position the middle frame 30 of the consumer electronic product from multiple angles, effectively improving the positioning accuracy and stability. Meanwhile, when the flexible contact part 121 contacts the middle frame 30 of the consumer electronic product, it can closely adhere to ensure the positioning effect and avoid scratching, bumping and other damage to the surface of the middle frame 30 of the consumer electronic product, thereby protecting the appearance quality of the product, and is particularly suitable for the middle frame 30 detection link of the consumer electronic product with high appearance requirements. The structural design of the pneumatic clamping device 10 can better adapt to middle frames 30 of different models and sizes of consumer electronic products. By adjusting the air pressure and other parameters, the contact part 121 can be flexibly matched with various middle frames 30 of consumer electronic products and effectively positioned, without the need to specially design and replace complex mechanical clamps for different middle frames 30 of consumer electronic products, thereby improving the universality and compatibility of the clamp on the production line, reducing the production cost and production preparation time. The circumferentially arranged pneumatic clamping device 10 can leave enough detection space for the vision detection camera, and since it can complete the entire detection process through one clamping, the time waste and detection error accumulation caused by multiple clamping and adjustment in the traditional positioning mode are avoided. This significantly reduces the cycle time of equipment detection and improves the detection efficiency of the entire vision detection system.

[0041] As a further improvement of the utility model, please refer to Figures 3-4The isolation membrane 1221 is provided with a valve hole 1222, which includes a boss portion 12221 and a recessed portion 12222. The boss portion 12221 connects the isolation membrane 1221 and the recessed portion 12222. By providing the valve hole 1222 on the isolation membrane 1221, a unique structural form is presented, which consists of two parts: the boss portion 12221 and the recessed portion 12222. The boss portion 12221 serves to connect the isolation membrane 1221 and the recessed portion 12222. The boss portion 12221 protrudes from the surface of the isolation membrane 1221 into the second cavity 12 to a certain height, and is integrally formed with the main body of the isolation membrane 1221 or tightly connected by a reliable connection method to ensure the stability of the structure. The recessed portion 12222 is recessed into the second cavity 12 to form a crater shape. When the gas pressure inside the first chamber 11 rises to a certain level, exceeding the normal operating pressure range, a pressure relief operation is required through the valve port 1222. Since the crater faces the interior of the first chamber 11, the gas will initially rush directly towards the crater of the valve port 1222, meaning it will first contact the boss portion 12221. The boss portion 12221 will obstruct the airflow, causing the gas to accumulate around it and generate pressure buildup. Some of the gas will then gradually flow into the recessed portion 12222 along the connection edge between the boss portion 12221 and the isolation membrane 1221. When the air pressure is low, it is confined within the first cavity 11, forcing the gas to push the second cavity 12 forward until the flexible contact part 121 contacts the consumer electronics product frame 30. At this point, the air pressure in the first cavity 11 further increases until it exceeds the pressure threshold of the crater-shaped valve hole 1222 of the isolation membrane 1221 and enters the second cavity 12. For the first cavity 11, the presence of the valve hole 1222 allows it to safely and effectively release pressure when abnormally high pressure occurs, maintaining the air pressure within the cavity within a reasonable range. This ensures the stability and reliability of the first cavity 11 in its function of pushing the second cavity 12 to slide by air pressure. For the second cavity 12, reasonable pressure release avoids the transmission of excessively high air pressure from the first cavity 11, which could affect its normal sliding action and its function of positioning the consumer electronics product frame 30 in conjunction with the flexible contact part 121. This ensures that the two cavities can work together in a suitable air pressure environment, providing accurate and stable positioning assurance for the visual inspection of the consumer electronics product frame 30.

[0042] As a further improvement of this utility model, the flexible contact portion 121 is provided with a plurality of pressure relief holes 1211 at intervals. By providing a plurality of pressure relief holes 1211 at intervals through the flexible contact portion 121, a gas channel is formed from one side of the contacting consumer electronics product frame 30 to the other. When the flexible contact portion 121 contacts the complete frame, the pressure relief holes 1211 are blocked by the frame contact surface, preventing the air pressure in the second cavity 12 from being released. When the contact head contacts the frame containing structures such as volume holes and charging holes, the pressure relief holes 1211 can release the air pressure in the second cavity 12. In different working environments and when facing various consumer electronics product frames 30, the pressure relief holes 1211 of the flexible contact portion 121 can automatically adjust the air pressure at the contact point, enhancing the adaptability of the pneumatic clamping device 10 to different working conditions and products. Under complex and variable air pressure conditions, the entire fixture can still work stably and reliably by relying on the coordinated cooperation of the pressure relief hole 1211 and other related components, reducing the probability of failure caused by abnormal air pressure, improving the overall reliability of the pneumatic clamping device 10, and ensuring the smooth progress of visual inspection of the mid-frame 30 of consumer electronics products.

[0043] As a further improvement of this utility model, the flexible contact part 121 is made of rubber. By using rubber as the material of the flexible contact part 121, when the pneumatic clamping device 10 is driven by air pressure and the second cavity 12 slides, the flexible contact part 121 contacts the mid-frame 30 of the consumer electronics product. The rubber can undergo corresponding elastic deformation according to the outer contour of the mid-frame 30 of the consumer electronics product, thereby tightly fitting the surface of the mid-frame 30 of the consumer electronics product, achieving all-round, seamless contact. This can better adapt to mid-frames 30 of consumer electronics products of different models and sizes, reduce positioning errors caused by shape mismatch, and ensure that the mid-frame 30 of the consumer electronics product is in an accurate detection position during visual inspection, which helps to improve the accuracy and reliability of the inspection results. At the same time, even if subjected to a certain amount of external pressure or friction during the clamping process, it is not easy to break or fracture during contact and positioning, ensuring the structural integrity and long-term performance of the contact part 121.

[0044] As a further improvement of this utility model, the air hole 111 includes an air inlet 1111 and an air outlet 1112, both of which are connected to the first cavity 11. The air inlet 1111 and the air outlet 1112 allow for precise and flexible control of the air pressure within the first cavity 11. The air intake of the air inlet 1111 and the exhaust of the air outlet 1112 can be adjusted according to the positioning requirements of different models of consumer electronics frames 30, achieving different air pressure driving effects, meeting diverse positioning accuracy and contact pressure requirements, and improving the adaptability of the pneumatic clamping device 10 to different products. This enables it to perform excellent positioning functions in various visual inspection scenarios of consumer electronics frames 30.

[0045] As a further improvement of this utility model, the pneumatic clamping device 10 further includes an air inlet 112 and an air outlet 113; the air inlet 112 is provided with an air inlet channel 1121, and the air inlet 112 is threadedly connected to the air inlet hole 1111, and the air inlet channel 1121 communicates with the first cavity 11; the air outlet 113 is provided with an air outlet channel 1131, and the air outlet 113 is threadedly connected to the air outlet hole 1112, and the air outlet channel 1131 communicates with the first cavity 11. The air inlet 112 and the air outlet 113 establish a tight and crucial connection with the first cavity 11 through threaded engagement with the air inlet hole 1111 and the air outlet hole 1112, respectively, becoming an important bridge for the effective entry and exit of gas in the first cavity 11. The air inlet 112 is responsible for stably introducing gas from an external air source into the first cavity 11, providing it with the necessary air pressure for operation. The air outlet 113 ensures that excess or vented gas in the first cavity 11 can flow out smoothly. Working together, they precisely regulate the air pressure within the first cavity 11, allowing it to better fulfill its core driving role in the pneumatic clamping device 10, propelling the entire clamp to complete the positioning and other processes of the consumer electronics product's mid-frame 30. The air inlet 112 and air outlet 113 cooperate with components such as the second cavity 12, the isolation membrane 1221, and the flexible contact part 121. The gas introduced by the air inlet 112 increases the air pressure within the first cavity 11, thereby pushing the second cavity 12 to slide, causing the flexible contact part 121 to contact the consumer electronics product's mid-frame 30 for positioning. Since the air inlet 112 and air outlet 113 are connected to the air inlet 1111 and air outlet 1112 via threads, the air inlet 112 and air outlet 113 can be easily replaced to suit different air source equipment, different working environments, or different air pressure requirements. This enhances the adaptability of the pneumatic clamping device 10 to various working conditions, enabling it to be widely used in visual inspection scenarios of the frame 30 of different models of consumer electronics products, thus improving its versatility and scope of application.

[0046] As a further improvement of this utility model, the pneumatic clamping device 10 also includes a pneumatic pressure feedback device 13, which is connected to the first cavity 11. The pneumatic pressure feedback device 13 is used to provide feedback on the air pressure threshold of the first cavity 11. By connecting the pneumatic pressure feedback device 13 to the first cavity 11, real-time feedback on the air pressure in the first cavity 11 can be achieved. Based on the air pressure monitored by the pneumatic pressure feedback device 13, the working state of the air inlet 112 and the air outlet 113 can be adjusted. The pneumatic pressure feedback device 13 can also be used to determine whether there are volume holes, power holes, charging ports, and speaker holes on the contact surface between the flexible contact head and the mid-frame 30 of the consumer electronics product. It has a pneumatic pressure feedback threshold condition function. Different thresholds are set on the pneumatic pressure feedback device 13 for different sizes of the third hole 33, the second hole 32, and the first hole 31. This allows for the determination of the volume holes, power holes, charging ports, and speaker holes. When the product is placed face up, the specific relative positions of the third hole 33, the second hole 32, and the first hole 31 with the internal air passage of the pneumatic clamping device 10 ensure a stable air pressure within the air passage under a certain intake or exhaust volume. The air pressure value monitored by the pressure feedback device 13 will be within a corresponding threshold. However, when the consumer electronics product frame 30 is placed face down, under the same intake or exhaust conditions, the relative positions of the holes and the air passage change, causing the air pressure value monitored by the pressure feedback device 13 to exceed the threshold range for the face-up placement, thus triggering an alarm signal. This distinguishes the face-up and face-down positions of the consumer electronics product frame 30. Once the consumer electronics product frame 30 is placed on the pneumatic clamping device 10, its face-up and face-down positions can be automatically detected without manual intervention or complex visual recognition equipment, reducing labor costs, improving production inspection efficiency and automation levels, and meeting the needs of modern large-scale, high-efficiency manufacturing.

[0047] This utility model also provides a visual inspection device for visual inspection of the mid-frame 30 of consumer electronics products. Please refer to [link / reference]. Figure 5The visual inspection device includes the aforementioned pneumatic clamping device 10 and a visual camera 20; the visual camera 20 is respectively located at the upper and lower ends of the consumer electronics product's frame 30. The combination of precise positioning by the pneumatic clamping device 10 and multi-angle shooting from the upper and lower ends of the visual camera 20 greatly improves the accuracy and efficiency of the inspection. The pneumatic clamping device 10 ensures that the consumer electronics product's frame 30 is in a stable and accurate position during the inspection process, avoiding blurry images or inspection errors caused by shaking, displacement, or other factors. The visual camera 20, with its comprehensive coverage from both the upper and lower ends, can acquire a large amount of detailed and accurate image information at once, quickly and accurately identifying potential appearance defects, dimensional deviations, and other problems in the consumer electronics product's frame 30, thus improving product quality control capabilities. Since the pneumatic clamping device 10 can complete positioning with a single clamping operation, and the visual camera 20 can quickly complete shooting and inspection from both the upper and lower ends, the entire inspection process is simplified and optimized, reducing the time wastage and increased labor costs caused by cumbersome operations such as multiple clamping and multi-angle adjustments in traditional inspection methods. This visual inspection device can adapt to the inspection needs of mid-frames 30 of consumer electronics products of different models, sizes, and various appearance designs. The pneumatic clamping device 10 can flexibly adjust the positioning method according to different mid-frames 30 of consumer electronics products, and the layout of the visual camera 20 at both ends can also flexibly cope with the height, shape changes, and other conditions of different mid-frames 30 of consumer electronics products. There is no need to design a separate inspection device for each mid-frame 30 of consumer electronics products, which reduces production costs, improves the versatility and reusability of the equipment on the production line, and meets the requirements for mid-frame inspection in large-scale and diversified production.

[0048] As a further improvement of this utility model, the number of pneumatic clamping devices 10 is at least four; each pneumatic clamping device 10 includes a first clamp 101, a second clamp 102, a third clamp 103, and a fourth clamp 104; the first clamp 101 and the second clamp 102 are arranged opposite to each other, and the first clamp 101 or the second clamp 102 corresponds to the first hole 31 of the consumer electronics product frame 30; the third clamp 103 and the fourth clamp 104 are arranged opposite to each other, the third clamp 103 corresponds to the second hole 32 of the consumer electronics product frame 30, and the fourth clamp 104 corresponds to the third hole 33 of the consumer electronics product frame 30. In practical applications, the first hole 31, the second hole 32, and the third hole 33 can be a charging hole, a power hole, and a volume hole, respectively. By using four pneumatic clamping devices 10 to correspond to different key holes of the consumer electronics product frame 30 and to position the frame from multiple directions, a precise positioning effect for the consumer electronics product frame 30 is achieved. Meanwhile, the third hole 33, the second hole 32, and the first hole 31 of the consumer electronics product's frame 30 are not only in different positions but also vary in size. A pneumatic feedback device 13, which can be connected to the corresponding pneumatic clamping device 10, sets corresponding thresholds for these hole characteristics. When the consumer electronics product's frame 30 is placed on the pneumatic clamping device 10, different orientations will cause these holes to form different communication states with the internal air channels of the clamp. Taking the front facing up as an example, since the layout and size of each hole are fixed relative to the clamp's air channels, under specific air intake or exhaust conditions, the air pressure in the air channels will stabilize within a threshold range corresponding to the front. The pneumatic feedback device 13 detects this air pressure value and determines that the product is placed on the front. Conversely, if the back of the consumer electronics product's frame 30 is facing up, under the same gas flow conditions, due to the change in the communication between the holes and the air channels, the air pressure value obtained by the pneumatic feedback device 13 will exceed the front threshold and enter the threshold range corresponding to the back, thereby triggering an alarm signal. This accurately distinguishes the front and back of the consumer electronics product's frame 30. The pneumatic clamping device 10 quickly secures the mid-frame 30 of the consumer electronics product, while the pneumatic feedback device 13 intelligently distinguishes between the front and back, simplifying the inspection process and reducing manual intervention and repetitive operations caused by misjudgment of the front and back. The vision camera 20 can then be quickly put into operation, significantly shortening the inspection time and improving the overall inspection efficiency.

[0049] It should be noted that in actual visual inspection applications of the mid-frame 30 in consumer electronics products, given the characteristics of the longer side of the mid-frame 30, two pneumatic clamping devices 10 are chosen to be installed on the longer side for more precise positioning. The longer side of the mid-frame 30 often has a large span, making it difficult to achieve stable and accurate positioning from all directions using only a single clamp, which can easily lead to unstable positioning in localized areas. When two pneumatic clamping devices 10 are deployed, they are fixed at different positions along the longer side, applying a uniform and stable positioning force to the mid-frame 30 from multiple points. This effectively prevents the mid-frame 30 from falling, maintaining the continuity and stability of the inspection process. It avoids the need for re-clamping and restarting the inspection process due to the mid-frame 30 accidentally detaching from the inspection position, saving inspection time and preventing damage to the mid-frame 30 caused by falling, thus reducing the probability of defective products.

[0050] As a further improvement of this utility model, the vision camera 20 is a CCD camera. In this visual inspection device for the mid-frame 30 of the consumer electronics product, the CCD camera is set at the upper and lower ends of the mid-frame 30. After the pneumatic clamping device 10 accurately positions the mid-frame 30, the CCD camera takes pictures of the corresponding inspection area of ​​the mid-frame 30. Compared with some ordinary cameras, the CCD camera can more clearly display details such as tiny scratches, dents, and textures on the mid-frame 30, which can greatly improve the accuracy of inspection for the appearance quality of the mid-frame 30.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pneumatic clamping device for visual inspection of a middle frame of a consumer electronic product, the pneumatic clamping device being annularly arranged around a circumference of the middle frame of the consumer electronic product, characterized in that, The pneumatic clamping device includes: a first cavity and a second cavity, wherein the first cavity is sleeved outside the second cavity, and the second cavity is slidably connected to the first cavity; The first cavity has an air hole at the end away from the second cavity, and the air hole is used to deliver compressed air into the first cavity; The second cavity includes a flexible contact portion and a connecting portion. The connecting portion is slidably connected to the inner wall of the first cavity. The connecting portion is provided with an isolation membrane. When the air pressure inside the first cavity increases, it pushes the second cavity to slide so that the flexible contact portion contacts the frame of the consumer electronics product.

2. The pneumatic clamping device according to claim 1, characterized in that The isolation membrane is provided with a valve hole, which includes a boss portion and a recess portion, and the boss portion connects the isolation membrane and the recess portion.

3. The pneumatic clamping device according to claim 1, characterized in that: The flexible contact portion is provided with multiple pressure relief holes at intervals.

4. The pneumatic clamping device according to claim 3, characterized in that: The flexible contact part is made of rubber.

5. The pneumatic clamping device according to claim 1, characterized in that: The air vent includes an air inlet and an air outlet, both of which are connected to the first cavity.

6. The pneumatic clamping device according to claim 5, characterized in that: The pneumatic clamping device also includes an air inlet and an air outlet; The air intake component is provided with an air intake channel, the air intake component is threadedly connected to the air intake hole, and the air intake channel is connected to the first cavity; The air outlet component is provided with an air outlet channel, and the air outlet component is threadedly connected to the air outlet hole. The air outlet channel is connected to the first cavity.

7. The pneumatic clamping device according to claim 5, characterized in that: The pneumatic clamping device further includes a pneumatic feedback device, which is connected to the first cavity and is used to provide feedback on the pneumatic pressure threshold of the first cavity.

8. A visual inspection apparatus for visual inspection of a middle frame of a consumer electronic product, characterized in that: Includes the pneumatic clamping device as described in any one of claims 1-7 and a vision camera; The visual cameras are respectively located at the top and bottom ends of the frame of the consumer electronics product.

9. The vision inspection apparatus of claim 8, wherein: The number of the pneumatic clamping devices is at least four; The pneumatic clamping device includes a first clamp, a second clamp, a third clamp, and a fourth clamp; The first clamp and the second clamp are arranged opposite to each other, and the first clamp or the second clamp corresponds to the first hole in the frame of the consumer electronics product; The third clamp and the fourth clamp are arranged opposite to each other, the third clamp corresponds to the second hole in the mid-frame of the consumer electronics product, and the fourth clamp corresponds to the third hole in the mid-frame of the consumer electronics product.

10. The vision inspection apparatus of claim 8, wherein: The vision camera is a CCD camera.

Images