Miniaturized manipulator with self-locking triggering and power-assisting and pulling-assisting functions

Abstract

The invention belongs to the technical field of communication equipment, and particularly discloses an extremely-miniaturized pulling-assisting manipulator with self-locking triggering and assisting, which consists of a cover cap, a torsion spring, a framework, a welding cover plate, a locking handle and a compression spring. The framework is the core, the handle is unique in design, and the cap and the framework are matched to limit the torsion spring. The torsion spring provides pulling and inserting assisting force and retaining force, and the framework is provided with a plurality of functional structures. The welding cover plate is used for sealing and welding attractiveness, the locking handle is provided with an L-shaped clamping groove and other structures to be matched with the lining plate, and a compression spring guarantees stability. The unplugging-assisting manipulator is assembled on an electronic equipment single board, reliable unplugging and plugging can be achieved in a limited space, devices and circuits are protected, the overall performance and stability of equipment are improved, and the unplugging-assisting manipulator is suitable for communication type electronic equipment and the like which have high requirements for space and hardware protection.

Description

Technical Field

[0001] The present invention relates to the technical field of communication devices, and in particular, to an extremely miniaturized, self-locking, trigger-equipped, and assist-pulling manipulator for a single board of a communication device, and an electronic device including such a structure. Background Art

[0002] In the field of communication devices, an assist-pulling manipulator is an important component on a single board. With the development of technology, the requirement for the utilization rate of the chassis space is continuously increasing. The thickness of the traditional liner (such as 41 mm or even thicker) can no longer meet the requirements. Now, the overall thickness of the liner needs to be compressed to 20 mm, and a non-loosening screw needs to be placed at the position of the liner. At the same time, to ensure the aesthetics and sealing of the panel and to make a heat dissipation air duct, the overall height of the assist-pulling manipulator also needs to be reduced. The traditional assist-puller has many deficiencies. For example, it has a large thickness and needs to use the thickness space to make a spring for plugging and unplugging and extend it to the entire plugging and unplugging space, resulting in its inability to be used in a narrow space. During assembly and use, it needs to be far away from external connectors (such as optical ports and electrical ports). Otherwise, during the plugging and unplugging process, the optical fiber cable may fall off or be damaged due to the thickness problem. For some modules with a large gap between the large-volume liner and the top of the pcb, although the assist-pulling manipulator can be placed under the external connector during plugging and unplugging, each time of plugging and unplugging requires unplugging the line of the optical port or electrical port, which is not only cumbersome to operate, but also reduces the reliability due to multiple pluggings and unplugging of the cable. It may even damage the optical module due to improper operation by the debugging engineer, or damage devices such as the optical cage on the pcb board due to factors such as the reed on the liner. When the force is too large, the pad may be broken, causing the entire pcb board to be sent back to the factory for repair.

[0003] In addition, the functions of the general assist-pulling manipulators on the market have defects. Most of them do not have the function of assist-pulling during plugging and unplugging. Even if some are equipped with torsion springs, they cannot maintain a partially pulled-out state at any time through the torsion springs. In the part of the structure in contact with the devices on the pcb, if the assist-pulling manipulator cannot maintain a pulled-out state during plugging and unplugging, it is difficult to determine whether the devices on the pcb are triggered during the plugging and unplugging process, which may lead to plugging and unplugging back and forth to trigger the devices. This will not only affect the service life of the devices, but also make the hardware function unstable. In severe cases, it may even burn out the entire pcb board, causing permanent losses. Especially for some sensitive and expensive chips, the back-and-forth triggering of the assist-pulling manipulator may also cause the device to fall off and trigger a short circuit, burning out the chip. Although some traditional assist-pulling manipulators have the triggering function after assembly, they will always maintain the triggered state, which is likely to cause the device to loosen and fall off during the vibration of the device. After the shock and vibration test of the chassis and the board card, the entire module needs to be pulled out to observe whether the devices in contact with the pcb fall off. Sometimes, it is impossible to determine whether it is damaged by the naked eye, and a multimeter or even software needs to be used for testing. This undoubtedly increases the workload of the test engineer and the difficulty of troubleshooting problems, and may also cause the trigger to short-circuit due to the mechanical structure stress. Troubleshooting problems may take up to a month or even longer.

[0004] In addition, the price of traditional assisted extraction manipulators with relatively complete functions is high. For example, the assisted extraction manipulator shown in patent CN 108932045 A has a heterogeneous structure in appearance, and there are two hardware contact positions in the middle of the assisted extraction manipulator handle, which has high precision requirements, complex processing and assembly procedures, and high costs. Therefore, it is particularly necessary to study a very miniaturized assisted extraction manipulator with self-locking, triggering and power assistance for communication equipment single board and an electronic device containing the structure. Summary of the invention

[0005] The present invention provides a very small-sized manipulator with self-locking trigger and power-assisted extraction, including a cap, a torsion spring, a frame, a welding cover plate, a locking handle and a compression spring. The frame is a core component, and its left hand end is a handle of the extraction manipulator. The handle is designed with reference to a specific curve and the tail corner is slightly tilted. The cap is provided with an installation positioning surface, a width slot, and a screw installation hole. The width slot is used to place the torsion spring and determine its extension angle. The torsion spring adopts a 180° torsion spring, which provides stability and assistance to the extraction manipulator during the extraction and insertion process through its compression and rebound. The frame has a two-way plug-in and extraction assembly, a limiting surface that cooperates with the cap, a stepped plug-in and extraction structure, a locking handle installation groove near the top, a humanized push-pull ring structure and an outer ring at the end, and a trigger device and an extraction boss at the top. The welding cover plate is used for beautiful sealing after debugging and for limiting with the frame. The locking handle has an L-shaped clip groove at the top, a C angle on the side, a compression spring installation in the middle, and an anti-slip groove at the end. The compression spring is selected according to the mounting slot of the locking handle and the related structure of the locking handle, and is used to maintain the stability of the auxiliary extraction manipulator during the extraction and insertion process.

[0006] Furthermore, a through hole is opened in the center of the cylindrical screw mounting hole of the cap and there are two slots. The width of the slot is determined according to the external dimensions and tolerance of the torsion spring. The stepped shaft of the cap cooperates with the frame and leaves a gap of 0.15mm, and the overall width is 6.3mm. There is a plane at the width position for limiting the position with the limiting surface of the cap inside the frame. The upper and lower slots of the cap allow the torsion spring to form an angle during the initial assembly and limit its up and down movement by cooperating with the lining plate locating pin.

[0007] Furthermore, the torque calculation formula of the torsion spring is T=K×θ, where E is the rigidity modulus of the wire, d is the wire diameter, Dm is the mean diameter, P is pi, N is the total number of turns, and R is the force arm of the load. Its parameters are determined by calculation to meet the torque requirements of the auxiliary extraction robot at different angles during the extraction and insertion process.

[0008] Furthermore, the trigger device of the skeleton adopts a hyperbolic structure, which slowly contacts the device of the PCB board through a single curved surface. When the trigger device reaches the center of the trigger, the trigger state is turned on. After being pulled out at a certain angle, it begins to disengage. The torsion spring at the assembly cap position of the skeleton can keep the skeleton in the pulled-out state and ensure the stability of the skeleton state during the cable throwing process.

[0009] Furthermore, the ejecting boss of the ejecting manipulator of the framework is rectangular, and its size is determined according to the number of connectors and the number of pins. Through finite element analysis, it is ensured that it can withstand sufficient force during the ejection process to separate the module and the backplane connector.

[0010] Furthermore, the L-shaped clamping groove of the locking handle is designed with the center hole of the cap screw mounting hole as the axis center. The width is determined in combination with the angle formed between the framework and the panel during insertion, and the compression space of the compression spring is considered. The C-angle slides into the slot by friction with the module panel, and the thickness position of the C-angle has a step structure with a smaller outer and larger inner thickness, enabling better cooperation between the middle part of the locking handle and the framework. The movement of the ejecting manipulator in the X, Y, and Z axes is restricted by welding the cover plate, the compression spring, and the limiting device.

[0011] Furthermore, the compression spring is selected according to the position and size of the mounting groove of the locking handle, the two bosses of the locking handle, and the requirement of supporting the locking handle after rebounding within a 2.9-mm compression space. Its inner diameter is larger than the outer diameter of the two bosses of the locking handle. By calculating the resilience and compression space of springs with different wire diameters and conducting tests, the compression spring meeting the requirements is preferably selected.

[0012] Furthermore, the assembling method of the ejecting manipulator includes the steps of: installing the torsion spring into the cap according to the tracking line and forming a preliminary compressed state, and then installing it into the framework; installing the compression spring into the locking handle, and then installing the three as a component into the framework; debugging the locking handle to make it normally tighten and rebound, and then welding the welding cover plate to the framework.

[0013] On the other hand, the present invention also provides an electronic device, including the ultra-miniaturized, self-locking, trigger-equipped, and assisted-ejection ejecting manipulator. The ejecting manipulator is assembled on a single board of the electronic device and works together with the single board and other components to achieve reliable plugging and unplugging operations of the single board in the chassis.

[0014] Beneficial effects:

[0015] The thinning design of the pull-out robot handle significantly increases the available space for external connectors, making it easier to arrange optical ports, electrical ports and other external connector module structures within the limited panel range, effectively improving the utilization of panel space and creating conditions for integrating more functional modules in a small space. The application of the stepped structure sets the installation screw position as a high step and the outside of the module panel as a low step, so that the pull-out robot handle is cleverly flush with the module bottom plate structure, minimizing the space occupied by the pull-out robot, further releasing valuable panel space resources, and facilitating the miniaturization and high-density integrated design of the equipment. The miniaturized design of the overall structure enables the pull-out robot to perfectly adapt to the stringent requirements of extreme lining structures. Even in complex situations such as when the lining thickness is compressed to 20mm and loose screws need to be placed, it can still work stably and reliably, providing strong support for the compact layout of the internal space of communication equipment and enhancing the versatility and adaptability of the equipment in different structural design scenarios. The newly added limit device effectively prevents the auxiliary extraction manipulator from colliding with the PCB structure due to excessive rotation during the plug-in and unplug process, thereby greatly reducing the risk of damage to the devices on the PCB due to friction, ensuring the integrity and stability of the hardware circuit, reducing the probability of hardware failure due to mechanical operation, and improving the reliability and service life of the equipment. The 180° torsion spring is used to provide a stable holding force, which effectively solves the problem that the auxiliary extraction manipulator handle position is difficult to maintain stably during the plug-in and unplug process, prevents accidental changes in the handle position due to chassis tilt or other external factors, and thus avoids potential damage to PCB devices caused by handle shaking, ensuring the accuracy and safety of the plug-in and unplug operation. The unique trigger device design realizes the precise triggering of PCB board devices at the beginning of the unplugging stage, and can accurately maintain the corresponding trigger state according to the plug-in and unplug position. At the same time, it can quickly and safely fall off the trigger on the PCB board when needed, meeting the complex and changeable trigger function requirements, providing reliable protection for the control and signal transmission of the hardware circuit, and effectively improving the overall performance and intelligence level of the equipment. This multifunctional trigger mechanism not only optimizes the triggering process of the circuit, but also effectively protects the connector on the PCB through curved surface contact and other methods, reducing the damage to the connector caused by the stress generated by the triggering operation, further improving the stability and reliability of the hardware connection, and reducing the interference and error rate during the signal transmission process. During the plugging and unplugging process, the assisted pull-out manipulator, thanks to the ingenious design of the torsion spring, can provide just the right amount of assistance when needed, making it easier and more labor-saving for the operator to pull out the plug. At the same time, it can also maintain the stable state of the plug at any time, facilitating subsequent operations or inspections, greatly improving the convenience and efficiency of the operation.When fully pulled out, the carefully designed limit device can effectively prevent the accidental contact between the assistive extraction manipulator and the components on the PCB board, avoiding damage to the components caused by misoperation or external force interference, further enhancing the safety and reliability of the operation, and providing strong support for the maintenance and management of the equipment. During the assembly insertion process, the user-friendly handle design and reasonable mechanical structure enable the operator to easily and accurately push the module into the chassis guide rail. Moreover, during the pushing process, the assistive extraction manipulator can automatically achieve the precise insertion and reliable self-locking of the locking handle without complex adjustments or additional tools, significantly improving the assembly efficiency and accuracy. The special structural design of the locking handle, such as the L-shaped clamping groove at the top, the C-corner on the side, and the anti-slip groove at the end, cooperate with each other, not only ensuring stability and reliability at different operation stages but also providing the operator with a good operating feel and convenient operation method, effectively reducing the risk of failures caused by human operation errors and improving the overall stability and maintainability of the equipment. The torsion spring and the helical spring both use standard parts. Compared with the specially customized springs used in traditional assistive extraction manipulators, they are not only low in price but also have stable supply, are easy to purchase and replace, greatly reducing the material cost and procurement cycle. At the same time, it also reduces the quality instability problems that may occur due to spring customization, improving the cost performance and market competitiveness of the product. The overall structural design of the assistive extraction manipulator simplifies the structure and quantity of components as much as possible on the premise of fully considering the functional requirements, reducing the processing difficulty and manufacturing cost. For example, the design of key components such as the cap and the skeleton has been optimized, reducing unnecessary processing procedures and complex assembly steps, enabling more efficient organization of production during mass production, reducing the production cost, and improving the production efficiency. The handle of the assistive extraction manipulator and other machined parts fully consider the reliability and repeatability of processing during the design process. Through reasonable tolerance design and standardized processing technology, the parts can maintain high consistency and stability during mass production, facilitating quality control and management. Considering the actual needs of mass production in the design, efficient production methods such as molds can be used for manufacturing, and at the same time, the corresponding simple tooling is designed for processing, further saving a large amount of processing man-hours and materials, improving the production efficiency, shortening the product delivery cycle, and being able to better meet the market's demand for rapid product delivery and large-scale supply. Description of the Drawings

[0016] Figure 1 Overall structure;

[0017] Figure 2 Detailed structure of the cap;

[0018] Figure 3 Detailed structure of the skeleton;

[0019] Figure 4 Detailed structure of the locking handle.

[0020] Wherein: 1. Cover cap, 2. Torsion spring, 3. Frame, 4. Welded cover plate, 5. Locking handle, 6. Compression spring, 7. Installation positioning surface, 8. Width slot, 9. Screw mounting hole, 31. Trigger device, 32. Assisted extraction manipulator insertion boss, 33. Assisted extraction manipulator extraction boss, 34. Locking handle mounting slot, 35. Humanized push-pull ring structure, 36. Outer ring, 37. Limiting column, 38. Cover cap matching limiting surface, 39. Step-type extraction and extraction structure, 41. L-shaped clamping groove, 42. C angle, 43. Compression spring mounting point, 44 Anti-slip groove. DETAILED DESCRIPTION

[0021] Example 1

[0022] like Figure 1 The auxiliary extraction manipulator is mainly composed of a cap 1, a torsion spring 2, a frame 3, a welding cover plate 4, a locking handle 5, and a compression spring 6. The design is based on the frame 3, and the left end of the frame 3 is used as the handle of the auxiliary extraction manipulator. The design refers to the original patent CN 108932045 A curve, and the tail corner is slightly tilted so that the operator can better contact and apply force during the plugging and unplugging operation.

[0023] like Figure 2 , 3 Cap 1: It is designed with an installation positioning surface 7 and a cap matching limiting surface 38 to facilitate installation and positioning. The center of the cylindrical screw mounting hole 9 is opened with a through hole, and there are two slots 8 for placing the torsion spring 2. The width of the slot 8 determines the extension angle of the torsion spring 2. The cap 1 has a stepped shaft for fixing the frame 3 and leaving a gap of 0.15mm (10) to facilitate the rotation of the frame 3 and limit its maximum deformation. Its overall width is 6.3mm, and there is a plane at the width position that matches the limiting surface 38 of the cap inside the frame 3 to ensure fast and accurate assembly. The cap 1 has upper and lower slots (B3 and B2) so that the torsion spring 2 forms a certain angle during the initial assembly, and by cooperating with the limiting column 37 on the liner, the up and down movement of the torsion spring 2 is limited, avoiding secondary processing on the liner positioning pin and the limiting column 37 on the frame 3, which is conducive to mass production. The cap 1 is made of Q235A material, and after rough machining with a 0.3mm margin, it is quenched to a hardness of HRC=36, then fine-machined, and finally nickel-plated as a whole to ensure the strength, precision and aesthetics of the part, and the color is consistent with other parts.

[0024] Torsion spring 2: A 180° torsion spring is used as the power device. The torque calculation formula is T = K × θ, where K is determined by the material, wire diameter, number of turns and geometric shape of the spring. The calculation formula is K = (Ed 4) / (1167DmPN*R). Determine appropriate torsion spring parameters through calculation. For example, wire diameter d = 0.5 mm, mean diameter Dm = 3.5 mm, total number of turns N = 4, and the force arm R where the load acts = 5 mm. Calculate the torsional stiffness coefficient K ≈ 4.57 N·m / rad. Calculate the torsion force at different angles based on the angle range (180° - 95°) during the plugging and unplugging process, select a suitable type of torsion spring 2, detect it with a torque wrench, and determine the finally selected torsion spring in combination with the actual plugging and unplugging test to ensure the stability and boosting effect of the plugging and unplugging manipulator during the plugging and unplugging process.

[0025] Skeleton 3: It is the core component of the assisting extraction manipulator and has a two-way plugging and unplugging component. It is provided with a limiting surface 38 that cooperates with the cap, and adopts a stepped plugging and unplugging structure 39. The position for screw installation has a high step to meet the screw installation requirements, and the position for plugging and unplugging the panel has a low step to meet the assembly requirements of the external connector. The transition position has an inverted C corner to ensure good plugging and unplugging transition. A locking handle installation groove 34 is set near the top position, which is convenient for opening and closing, and is placed as close as possible to the top of the skeleton to save space for placing more external connectors. The end of the skeleton adopts a humanized handle structure, including a humanized push-pull ring structure 35 and an outer ring 36, which is convenient for operation. The triggering device 31 at the top of the skeleton triggers the components on the pcb board to achieve two functions: structural plugging and unplugging and device circuit triggering. The triggering device 31 adopts a hyperbolic structure and slowly contacts through a single curved surface to reduce stress generation. When the triggering device 31 reaches the central part of the trigger, the triggering state is activated, and it starts to disengage after pulling out at an angle of 2°. At the same time, the torsion spring 2 can maintain the pulled-out state of the skeleton 3 to ensure the stable state of the skeleton during the cable swinging process. The assisting extraction convex platform 33 of the manipulator is designed as a rectangle (4.5 (length) x 2.5 width x 2 (thickness)), and its size is determined according to the number of connectors and the number of pins. Through finite element analysis, it is ensured that it can withstand sufficient force during the pulling process to make the module and the backplane connector fall off. When designing the limiting column 37, the maximum force (10.3498 N in the 180° state) is considered, and through mechanical simulation, it is ensured that the structure will not undergo large deformation under the extreme state. When designing the locking handle installation groove 34, the movement trajectory of the compression spring 6 and the height of the external connector are considered. It is moved as close as possible to the cap 1 and made smaller, and its displacement is within 2.9 mm. The fully compressed state of the selected compression spring 6 is 4 mm, the overall effective space is designed to be 10 mm, the width is designed to be 5.4 mm, and two compression springs 6 are accommodated in the middle and separated by partitions to prevent the compression springs 6 from getting disordered. The length of the partition is 4 mm. When the locking handle 5 moves to the partition position, it stops to achieve double limiting. During the pulling process of the humanized push-pull handle, the humanized pulling structure (outer ring) 36 contacts the index finger and automatically rotates 8° under the action of the torsion spring 2 with the center hole of the cap as the rotation center axis to create a plugging and unplugging space; during the inserting process, the thumb is placed on the inner curve, and the module is pushed into the chassis interior. When the module connector and the backplane connector come into contact, the locking handle 5 is pushed into the panel interior by squeezing the inner curve of the handle, and finally the module panel and the skeleton 3 are in a parallel state. The size of the assisting insertion convex platform 32 of the manipulator is 5.4 (length) x 2 (width) x 2 (height). During the inserting process, it starts to work when the module connector and the backplane connector are assembled and does not interfere with the panel position. Through finite element simulation, it is ensured that the mechanical state meets the insertion requirements and is compatible with more connectors. The cap-matching limiting surface 38 is mainly used for assembling the cap 1 and the torsion spring 2 to play a limiting role and is not used for bearing force. It is designed according to the assembled skeleton 3 and cap 1 to ensure structural stability and processing reliability.

[0026] Welding cover plate 4: It is mainly used for beautiful sealing welding after debugging. There are two slots on it, which cooperate with the skeleton 3 for limit, restricting the X-axis and Y-axis directions. In the Z-axis direction, after the compression spring 6 and the locking handle 5 are debugged, it is sealed by welding, and then polished after welding to ensure the overall appearance performance.

[0027] Locking handle 5: It is designed in three parts. As Figure 4 The L-shaped clamping groove 41 at the top position cooperates with the lining plate for limit fixation. The side inverted C-angle 42 is used for automatic alignment and insertion when cooperating with the lining plate. Taking the center hole of the cap screw mounting hole 9 as the axis center, the width of the L-shaped clamping groove 41 is designed in combination with the angle (such as 3°) formed by the skeleton 3 and the panel during the insertion process, considering the compression space of the compression spring 6. When the C-angle 42 contacts the module panel, the position changes through friction and finally slides into the slot. Since the clearance between the skeleton 3 and the cap 1 is small, it ensures the stability of the assistive extraction manipulator during the plugging and unplugging process. And the stepped structure (small outside and thick inside) at the C-angle thickness position enables better cooperation between the middle part of the locking handle and the skeleton. After the welding cover plate 4 is welded, it blocks the movement in the Z-axis direction, and the two ends are restricted from moving in the X and Y-axis directions through the compression spring 6, the limiting device, and the fitting of the contact side between the locking handle 5 and the skeleton 3. At the middle part, the compression spring installation part 43 is designed with two bosses according to the installation space of the skeleton 3 and the outer dimension of the compression spring 6. The diameter of the boss is 0.1 mm smaller than that of the compression spring 6, which is convenient for installation. The length of the boss exceeds the internal limiting groove of the locking handle installation groove 34 by 0.2 mm to prevent the compression spring 6 from moving randomly. The center distance between the center holes of the two bosses is aligned with the split groove of the locking handle installation groove 34, and the center position of a single boss is aligned with the center position of the locking handle installation groove 34, ensuring that the spring is in the center and the locking handle is stable when compressing the compression spring 6. At the end position, an anti-slip groove 44 is adopted, and the surrounding is grooved to increase the contact area and friction coefficient, preventing the hand from slipping during operation and facilitating the back-and-forth movement of the locking handle.

[0028] Compression spring 6: It maintains the stability of the assistive extraction manipulator during the plugging and unplugging process through the force generated by compression and rebound. The spring is selected according to the position and size of the locking handle installation groove 34 and the two bosses of the locking handle 5. Considering that within a compression space of 2.9 mm, the remaining resilience after rebound can support the locking handle 5 to maintain a stable state. Currently, the available space length of the compression spring 6 in the locking handle installation groove 34 is 6.7 mm. The inner diameter of the spring is larger than the outer diameter (1.3 mm) of the two bosses of the locking handle 5. A spring with an inner diameter of 1.6 mm is selected, and the dimensions of wire diameters of 0.3, 0.4, 0.5, and 0.6 mm are used for design reference and verification. Its resilience and compression space are calculated, and the material is selected as 304 stainless steel. After calculation, springs with different wire diameters are theoretically feasible. Considering factors such as the vibration environment, a spring with a wire diameter of 0.5 mm is preferentially selected. Through purchasing sample tests, the compression spring 6 that meets the mechanical properties and usage requirements is preferentially selected.

[0029] Assembly principle: Install the torsion spring 2 into the cap 1 according to the tracking line. At this time, the torsion spring 2 is restricted in the assembly angle by the cap 1 and compressed to form a preliminary compressed state. Then, install this component into the skeleton 3. During the assembly process, there are mating surfaces between the cap 1 and the skeleton 3 to ensure correct installation. Install the compression spring 6 into the locking handle 5, and then install these three parts as a component into the skeleton 3. Debug the locking handle 5 to make it able to be normally pressed and rebound, and then weld the welding cover plate 4 to the skeleton 3.

[0030] Installation process: The assistive extraction manipulator locks the component on the lining board through cross flat head screws. The tail of the cap passes through the skeleton 3 and is directly fixed to the lining board. After the cap 1 is locked, there is a 0.15 mm gap between the cap 1 and the skeleton 3 to facilitate rotation and insertion / extraction. After the cap 1 and the skeleton 3 are installed and fixed through the positioning surface, the torsion spring 2 is in a relatively compressed state. One end of it is fitted with the limiting post on the lining board, and the other end is assembled with the limiting post 37 on the skeleton. When the assistive extraction manipulator is in the locked state, the torsion spring 2 extends into the free state and releases elastic force to the limiting post 37 and the limiting post on the lining board at the same time. Since the lining board is fixed and does not deform, the elastic force is mainly concentrated on the boss of the skeleton. The locking handle 5 uses the L-shaped clamping groove 41 to clamp the through groove opened on the lining board.

[0031] Insertion / extraction operation process, extraction process: Hold the humanized push-pull ring structure (outer ring) 36 of the skeleton with your hand and move it towards the outside of the machine frame. Pull out the lining board by applying force at three points in the opposite direction of insertion. At the same time, the middle finger presses the anti-slip groove 44 of the locking handle to compress the spring 6. When the L-shaped clamping groove 41 of the locking handle is completely separated from the groove on the lining board, the internal torsion spring 2 generates a large force with the screw center hole as the origin to push the locking handle 5 out of the lining board. With the screw hole as the center, when the assistive extraction manipulator rotates 30°, the trigger device 31 of the skeleton triggers the device on the pcb board, performing two functions of completing the structure insertion / extraction and triggering the device of the switch. At the same time, the limiting device on the lining board controls the rotation angle of the assistive extraction manipulator. As the extraction progresses, the skeleton 3 and the module panel form different angles, such as 15°, 35°, 45°, etc. At the corresponding angles, the backplane and the module board card connector are gradually separated, and the trigger device 31 on the skeleton and the device on the module are also separated in sequence. Finally, the connectors on the module and the backplane are completely separated by the assistive extraction manipulator.

[0032] Insertion process: Hold the humanized push-pull ring structure 35 of the skeleton by hand and push the entire module into the interior of the chassis. The entire extraction-assisting manipulator rotates around the cap screw mounting hole 9. Due to the action of the torsion spring force, a reverse force is transmitted to the end of the skeleton during the insertion process, ensuring that the skeleton does not shift during insertion and there is a tactile feeling. When the top end of the extraction-assisting manipulator skeleton touches the internal slot of the chassis, the module is pushed inward, forming three-point force application (screw hole, chassis slot, and insertion boss 32 of the extraction-assisting manipulator). By only changing the direction of the insertion boss 32 of the extraction-assisting manipulator to push into the interior of the chassis, the module can be advanced along the predetermined track. During the advancement process, when the L-shaped clamping groove 41 at the top end of the locking handle touches the position of the lining plate, the compression spring 6 deforms to generate a reaction force, causing the C corner 42 of the locking handle to contact and insert into the interior of the lining plate at the opening of the lining plate. During the insertion process of the module, the C corner of the locking handle automatically aligns for insertion and self-locks. With the anti-slip groove 44 of the locking handle structural member, the middle finger can be used to assist in aligning for insertion, improving the insertion reliability. When the C corner of the locking handle is in full contact with the opening of the lining plate 42, the locking handle 5 and the lining plate produce a crisp sound under the action of the compression spring 6. The resilience of the compression spring 6 fixes the locking handle 5 on the X-axis plane of the lining plate, and the internal torsion spring also generates a resilience force to fix the locking handle on the Y-axis plane of the lining plate. The electronic device of the present invention includes the above-mentioned ultra-miniaturized, self-locking, trigger-equipped, and extraction-assisting manipulator with assistance. The extraction-assisting manipulator is assembled on the single board of the electronic device and works in coordination with the single board and other components to achieve reliable plugging and unplugging operations of the single board in the chassis, improving the overall performance and stability of the electronic device, and is particularly suitable for communication electronic devices and the like that have strict space requirements, require frequent plugging and unplugging of single boards, and have high requirements for hardware protection.

Claims

1. A miniature manipulator with self-locking trigger and assisted pulling, comprising a cap (1), a torsion spring (2), a skeleton (3), a welding cover plate (4), a locking handle (5) and a compression spring (6); characterized in that, The cap (1) is provided with an installation positioning surface (7), a width slot (8), and screw mounting holes (9). The width slot (8) is used to place the torsion spring (2) and determine its extension angle. The torsion spring (2) is an 180° torsion spring, and its compression and rebound provide stability and assistance for the plug - and - unplug manipulator during the plug - and - unplug process. The skeleton (3) has a cap - mating limit surface (38), a stepped plug - and - unplug structure (39), a locking handle mounting groove (34) near the top, a user - friendly push - pull ring structure (35), an outer ring (36), and a trigger device (31) and a plug - out boss (33) at the top. The welding cover plate (4) is used for aesthetic sealing after debugging and cooperates with the skeleton (3) for positioning. The top of the locking handle (5) has an L - shaped clamping groove (41), a C - angle (42) on the side, a compression spring installation location (43) in the middle, and an anti - slip groove (44) at the end. The compression spring (6) is selected according to the relevant structures of the locking handle mounting groove (34) and the locking handle (5).

2. The extraction-assisting manipulator according to claim 1, wherein The center of the cylindrical screw mounting hole (9) of the cap (1) is provided with a through - hole and has two slots (8). The width slot (8) is determined according to the outer dimension and tolerance of the torsion spring (2). The stepped shaft of the cap (1) cooperates with the skeleton (3) and has a 0.15 - mm stepped shaft clearance (10).

3. The extraction-assisting manipulator according to claim 1, wherein The torque calculation formula of the torsion spring (2) is T = K × θ, where K = (Ed 4 ) / (1167DmPN*R), E is the rigidity modulus of the wire, d is the wire diameter, Dm is the mean diameter, P is the pi, N is the total number of turns, and R is the lever arm of the load acting force.

4. The extraction-assisting manipulator according to claim 1, wherein, The trigger device (31) of the skeleton (3) adopts a hyperbolic structure and slowly contacts the devices on the pcb board through a single curved surface. When the trigger device (31) reaches the center part of the trigger, the trigger state is activated. And the torsion spring (2) at the position where the skeleton (3) is assembled with the cap keeps the skeleton (3) in the pulled - out state and ensures the stability of the skeleton state during the cable - swinging process.

5. The extraction-assisting manipulator according to claim 1, wherein, The plug - out boss (33) of the plug - assist manipulator of the skeleton (3) is rectangular, and its size is determined according to the number of connectors and the number of pins. Through finite - element analysis, it is ensured that it can withstand sufficient force during the pulling process to separate the module and the back - panel connector.

6. The extraction-assisting manipulator according to claim 1, wherein, The L - shaped clamping groove (41) of the locking handle (5) is designed with the center hole of the cap screw mounting hole (9) as the axis center.

7. The extraction-assisting manipulator according to claim 1, wherein The compression spring (6) is selected according to the position and size of the locking handle mounting groove (34), the two bosses of the locking handle (5), and the requirement of supporting the locking handle (5) after rebounding within a 2.9 - mm compression space. Its inner diameter is larger than the outer diameter of the two bosses of the locking handle (5). By calculating the resilience and compression space of springs with different wire diameters and conducting tests, the compression spring that meets the requirements is preferably selected.

8. The assembling method of the extraction-assisting manipulator according to any one of claims 1-7, characterized in that, It includes the steps: loading the torsion spring (2) into the cap (1) according to the tracking line and forming a preliminary compressed state, and then loading it into the skeleton (3); loading the compression spring (6) into the locking handle (5) and then loading the three as a component into the skeleton (3); debugging the locking handle (5) to make it normally compress and rebound, and then welding the welding cover plate (4) to the skeleton (3).

9. An electronic device, characterized in that, The ultra-miniaturized, self-locking, trigger-equipped and assisted-unplugging manipulator according to any one of claims 1-7, wherein the assisted-unplugging manipulator is assembled on a single board of an electronic device and works in cooperation with the single board and other components to achieve reliable plugging and unplugging operations of the single board in the chassis.

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