Pull-out locker for printed board assembly and use method of pull-out locker

Abstract

The invention provides a pulling locker for a printed board assembly, the pulling locker comprises a supporting cross beam, a movable beam, a pulling bolt, a locking bolt, a first connecting bolt and n-shaped supporting beams, the two ends of the supporting cross beam are respectively connected with the n-shaped supporting beams, the lower ends of the n-shaped supporting beams are detachably connected with a case where the printed board assembly is located, and the lower ends of the n-shaped supporting beams are connected with the movable beam. The movable beam is detachably connected with the printed board assembly through a first connecting bolt; a pulling bolt penetrates through a pulling through hole of the supporting cross beam and then is connected with the movable beam; the locking bolt is in threaded connection with the threaded hole for locking of the supporting cross beam, and the bottom end of the locking bolt abuts against the movable beam; the pulling bolt or the locking bolt is tightened through a torque wrench, and pulling or locking of the printed board assembly is achieved. The problem that the high-density electric connector printed board assembly is difficult to pull out and lock is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment maintenance and assembly tools, in particular to a puller and locker for printed circuit board components and a use method thereof. Background Art

[0002] During the repair and assembly of electronic equipment, the removal and locking of circuit boards are common and critical operations. With the increasing signal transmission density between printed circuit boards (PCBs) used in aerospace payloads, high-density connectors are becoming increasingly popular. Standard connectors for avionics modules, such as the LRM (Low Resistance Modular) series, boast significant advantages such as modularity, integration, high density, and high speed. They are primarily used within chassis to vertically connect daughterboards (i.e., printed circuit board assemblies) to motherboards, enabling the integrated transmission of RF, differential, optical, and power signals. They are widely used in a wide range of applications, including integrated avionics systems, satellite communications and navigation, fire control radar, and high-speed communication systems. However, this high connector density also presents new challenges. The force required to separate and lock the connector holes often exceeds the limits of manual operation, making the removal and locking of PCBs extremely difficult.

[0003] Existing lockers or pullers have many shortcomings. First, they usually need to occupy a large amount of space on the printed circuit board, resulting in a serious shortage of available space resources for the printed circuit board. Secondly, the structural design is complex and the operation is cumbersome, which brings many inconveniences to maintenance and assembly work. In addition, most existing lockers or pullers are fixedly connected to the printed circuit board and cannot be removed, thus occupying valuable weight resources. In aerospace products, weight resources are extremely tight, and the increased weight will not only limit the performance of the equipment, but also significantly increase the cost. In addition, most existing lockers or pullers only have a single pulling or locking function, and cannot take into account other functions. They are inefficient and difficult to meet the requirements of modern electronic equipment for efficient and convenient operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a pull-out locker for a printed circuit board assembly and a method of using the same, which effectively solves the problem of difficulty in pulling out and locking a printed circuit board assembly of a high-density electrical connector.

[0005] To achieve the above-mentioned object, the present invention adopts a technical solution: a lifting and locking device for a printed circuit board assembly, characterized in that: the lifting and locking device comprises a supporting crossbeam, a movable beam, a lifting bolt, a locking bolt, a first connecting bolt and an "X"-shaped supporting beam, wherein the two ends of the supporting crossbeam are respectively connected to an "X"-shaped supporting beam, the "X"-shaped supporting beam is detachably connected to a chassis where the printed circuit board assembly is located, and the movable beam is detachably connected to the printed circuit board assembly via the first connecting bolt;

[0006] The pulling bolts pass through the pulling holes of the supporting beams and are then connected to the movable beams;

[0007] The locking bolt is threadedly connected to the locking threaded hole of the supporting beam, and the bottom end of the locking bolt is butted against the movable beam.

[0008] Furthermore, the first connecting bolt passes through the through hole of the movable beam and is connected to the locking nut, and the bottom end of the first connecting bolt is detachably connected to the printed circuit board assembly.

[0009] Furthermore, the structure of the "J" support beam is in the shape of an "J", and the "J" support beam includes a horizontal upper flange, two horizontal lower flanges and two vertical webs, the two ends of the upper flange are respectively connected to the corresponding webs of the corresponding lower flanges, the upper flange is provided with a fastening threaded hole, and the lower flange is provided with an expansion slot, and the lower flange is connected to the chassis through the expansion slot.

[0010] Furthermore, the supporting crossbeam is U-shaped, and both ends of the supporting crossbeam are flanged portions, and both flanged portions are provided with interface through holes;

[0011] The lifting and locking device comprises two "X"-shaped support beams, and the flanged portion is connected to the side surfaces of the upper flanges of the corresponding "X"-shaped support beams through interface through holes and fastening screws.

[0012] Furthermore, the extraction bolt passes through the extraction through hole of the supporting beam and is connected to the extraction threaded hole of the movable beam;

[0013] Each flange portion is provided with two interface through holes.

[0014] Furthermore, the supporting beam is further provided with a through hole, the through hole corresponding to directly above the first connecting bolt;

[0015] A shallow locking groove for limiting the bottom end of a locking bolt is provided on the top of the movable beam.

[0016] Furthermore, the supporting beam is provided with two groups of through holes for pulling out, two groups of threaded holes for locking and two groups of through holes. The spacing between the two groups of through holes for pulling out is a, the spacing between the two groups of threaded holes for locking is b, and the spacing between the two groups of through holes is c.

[0017] Furthermore, the movable beam is provided with two sets of threaded holes for pulling out, two sets of shallow grooves for locking, and two sets of through holes. The spacing between the two sets of threaded holes for pulling out is a, the spacing between the two sets of shallow grooves for locking is b, and the spacing between the two sets of through holes is c.

[0018] The projections of the corresponding through hole for pulling out and the corresponding threaded hole for pulling out in the vertical direction overlap; the projections of the corresponding threaded hole for locking and the corresponding shallow groove for locking in the vertical direction overlap; the projections of the corresponding through hole and the corresponding through hole in the vertical direction overlap.

[0019] A method for using a pull-out locker for a printed circuit board assembly, using the above-mentioned pull-out locker for a printed circuit board assembly, and the specific steps are as follows:

[0020] Step 1: Pass four fastening screws through the interface holes of the support beam to fix the support beam to the fastening threaded holes of the two "X" support beams respectively;

[0021] Step 2: The two first connecting bolts are respectively passed through the two through holes corresponding to the movable beam, and the two locking nuts are screwed into the first connecting bolts on the other side of the movable beam;

[0022] Step 3: Connecting the first connecting bolt on the movable beam to the printed circuit board assembly;

[0023] Step 4: Fix the expansion slots at both ends of the two "X" support beams to the chassis respectively;

[0024] Step 5: When locking the printed circuit board assembly, insert the two locking bolts through the locking threaded holes of the supporting beam respectively, and screw them into the locking shallow grooves corresponding to the movable beam. The two locking nuts are locked with the first connecting bolts to achieve a fixed connection between the first connecting bolt and the movable beam; use a torque wrench to tighten the two locking bolts respectively, the locking bolts push the movable beam downward, and the movable beam presses the locking nuts and the first connecting bolt downward. The first connecting bolt pushes the printed circuit board assembly into the chassis, completing the locking operation of the printed circuit board assembly;

[0025] Step six: When pulling out the printed circuit board assembly, unscrew the two locking bolts, then pass the two pulling bolts through the corresponding pulling holes on the supporting beam in turn, and fix them with the locking threaded holes on the movable beam. Then, use a torque wrench to tighten the two pulling bolts respectively, and the movable beam moves up with the first connecting bolt, and the first connecting bolt drives the printed circuit board assembly to move up, and pull the printed circuit board assembly out of the chassis to complete the printed circuit board assembly pulling operation.

[0026] A method for using a pull-out locker for a printed circuit board assembly, using the above-mentioned pull-out locker for a printed circuit board assembly, and the specific steps are as follows:

[0027] Step 1: Connect the two ends of the support beam to an "X" support beam respectively;

[0028] Step 2: Connect and fix the first connecting bolt and the movable beam;

[0029] Step 3, connecting the bottom end of the first connecting bolt to the printed circuit board assembly;

[0030] Step 4: Two X-shaped support beams are respectively connected to the chassis where the printed circuit board assembly is located;

[0031] Step 5: When locking the printed circuit board assembly, after the locking bolt is threadedly connected to the supporting beam, the bottom end of the locking bolt is against the movable beam. Use a torque wrench to tighten the locking bolt. The movable beam pushes the first connecting bolt downward, and the first connecting bolt pushes the printed circuit board assembly into the chassis.

[0032] Step 6. When pulling out the printed circuit board assembly, unscrew the locking bolt, pass the pulling bolt through the supporting beam and connect it to the movable beam with a thread, use a torque wrench to tighten the locking bolt, and the tightening action of the pulling bolt drives the movable beam to move upward, and the movable beam moves upward with the first connecting bolt, and the first connecting bolt moves upward with the printed circuit board assembly, and the printed circuit board assembly is pulled out of the chassis.

[0033] In view of the above technical features, the present invention has the following beneficial effects:

[0034] 1. The present invention relates to a pull-out locker for a printed circuit board assembly. The pull-out locker mainly utilizes a supporting crossbeam, a movable beam, and an "X" supporting beam in conjunction with bolts, screws, nuts, and other components to realize the pull-out locker for the printed circuit board assembly. The pull-out locker has a compact structure, occupies little space, and is ingeniously designed. It cleverly utilizes the existing space (i.e., the space at the top of the chassis) without occupying the inherent space of the printed circuit board, thereby maximally retaining the available space resources of the printed circuit board. The invention is particularly suitable for aerospace payload equipment with extremely strict space requirements.

[0035] 2. The present invention's puller and locker for printed circuit board assemblies (PCBs) can be locked or extracted by simply tightening the corresponding locking or extraction bolts after the PCB assembly and chassis are installed. This convenient and efficient operation effectively solves the difficulty of extracting and locking PCBs for high-density electrical connectors. It also simplifies the complex operating procedures of conventional lockers. Its unique structural design makes PCB insertion, extraction, and locking operations easier and more convenient, significantly improving maintenance and assembly efficiency and saving time and labor costs.

[0036] 3. The present invention provides a pull-out locker for a printed circuit board assembly. An operator only needs to use a torque wrench and a locking bolt to move the movable beam downward. The movable beam is moved downward through the first connecting bolt to press the printed circuit board assembly downward. The electrical connector plug of the printed circuit board assembly is inserted into the electrical connector socket in the chassis to lock the two. The locking is firm and reliable. It has a powerful locking function and can maintain a stable connection of the printed circuit board in harsh environments such as strong vibrations, effectively preventing signal transmission failures caused by loose connections and ensuring reliable operation of the equipment.

[0037] 4. The present invention provides a pull-out locker for a printed circuit board assembly. An operator only needs to use a torque wrench and a pull-out bolt to move the movable beam upward. The movable beam drives the printed circuit board assembly upward, and the electrical connector plug of the printed circuit board assembly and the electrical connector socket in the chassis are separated, so that the two are unlocked, making it easy to pull out the printed circuit board assembly, saving effort, and the printed circuit board assembly is subjected to more uniform force when being pulled out, thereby protecting the circuit board. By optimizing the design of the pull-out mechanism, the force required for pulling out the printed circuit board is significantly reduced, avoiding damage to the circuit board due to excessive force, and at the same time ensuring that the pinholes of the connector can be smoothly separated, thereby extending the service life of the connector.

[0038] 5. The present invention provides a pull-out locker for a printed circuit board assembly. The pull-out locker is detachably connected to the printed circuit board assembly and the chassis. After the printed circuit board assembly is locked with the chassis, the pull-out locker can be removed without increasing the weight of the printed circuit board assembly and the chassis. The detachable design saves weight resources. The detachable structural design allows for flexible installation and removal according to actual needs, avoiding the problem of traditional fixed lockers occupying effective weight resources. The device is particularly suitable for aerospace products that are extremely sensitive to weight, and helps to reduce the overall weight and cost of the equipment.

[0039] 6. The present invention provides a puller and locker for a printed circuit board assembly. The puller and locker can be used to lock the printed circuit board assembly with the chassis, and can also be used to separate the printed circuit board assembly from the chassis for easy extraction. It has multifunctional integration and high efficiency. It not only has a locking function, but also a pulling function, realizing the organic integration of the two functions. It has multiple uses, improves the efficiency of tool use, and reduces the types of tools required during maintenance and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a structural diagram of the pull-out locker of the present invention (during locking operation);

[0041] Figure 2 It is a structural schematic diagram of the pull-out locker of the present invention (during the pull-out operation);

[0042] Figure 3 This is a structural diagram of the supporting beam (main view angle);

[0043] Figure 4 Schematic diagram of the structure of the supporting beam (top view);

[0044] Figure 5 Schematic diagram of the structure of the supporting beam ( Figure 4 side view angle);

[0045] Figure 6 Schematic diagram of the structure of the movable beam (top view);

[0046] Figure 7 This is a structural diagram of the "J" support beam (main view angle);

[0047] Figure 8 This is a schematic diagram of the structure of the "J" support beam (top view angle);

[0048] Figure 9 This is a schematic diagram of the structure of the connection between the pull-out locker, printed circuit board assembly and chassis (during locking operation);

[0049] Figure 10 It is a schematic diagram of the structure of the connection between the extraction locker, printed circuit board assembly and chassis (during the extraction operation).

[0050] In the figure: 1, supporting beam; 1-1, interface through hole; 1-2, through hole; 1-3, threaded hole for locking; 1-4, through hole for extraction; 1-5, flange;

[0051] 2. Movable beam; 2-1. Through hole; 2-2. Shallow groove for locking; 2-3. Threaded hole for extraction;

[0052] 3. Pull out the bolts;

[0053] 4. Lock the bolts;

[0054] 5. Slanted support beam; 5-1. Fastening threaded hole; 5-2. Expansion slot; 5-3. Upper flange; 5-4. Lower flange; 5-5. Web; 5-6. Hollow portion;

[0055] 6. First connecting bolt;

[0056] 7. Lock nut;

[0057] 8. Tighten the screws;

[0058] 9. Printed circuit board assembly;

[0059] 10. Chassis. DETAILED DESCRIPTION

[0060] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0061] See also Figures 1 to 10, Specific embodiment 1, this embodiment 1 provides a lifting and locking device for a printed circuit board assembly, characterized in that: the lifting and locking device includes a supporting beam 1, a movable beam 2, a lifting bolt 3, a locking bolt 4, a first connecting bolt 6 and an "X" support beam 5, the two ends of the supporting beam 1 are respectively connected to an "X" support beam 5, the other end of the "X" support beam is detachably connected to the chassis 10 where the printed circuit board assembly 9 is located, the movable beam 2 is detachably connected to the printed circuit board assembly 9 through the first connecting bolt 6, for example, the first connecting bolt 6 is connected to the locking nut 7 after passing through the through hole 2-1 of the movable beam 2, the bottom end of the first connecting bolt 6 is detachably connected to the printed circuit board assembly 9, for example, the two are threadedly connected, when the printed circuit board assembly 9 is locked with the chassis 11, the lifting and locking device is removed, and the weight of the printed circuit board assembly 9 and the chassis 11 will not be increased.

[0062] The pulling bolt 3 passes through the pulling hole 1-4 of the supporting beam 1 and is connected to the movable beam 2. For example, the pulling bolt 3 passes through the pulling hole 1-4 of the supporting beam 1 and is connected to the pulling threaded hole 2-3 of the movable beam 2.

[0063] The locking bolt 4 is threadedly connected to the locking threaded hole 1-3 of the supporting beam 1, and the bottom end of the locking bolt 4 is abutted against the movable beam 2.

[0064] The support beam 1 is U-shaped, with flanges 1-5 at both ends. Both flanges 1-5 are provided with interface holes 1-1. For example, the lifting and locking device includes two "U"-shaped support beams 5. The two flanges 1-5 are respectively connected to the side surfaces of the upper flanges 5-3 of the corresponding "U"-shaped support beams 5 through the interface holes 1-1 and fastening screws 8, thereby achieving a fixed connection between the support beam 1 and the "U"-shaped support beam 5. The fastening screws 8 are in a horizontal position. When locking the printed circuit board assembly 9 and when lifting the printed circuit board assembly 9, the force acting on the support beam 1 is a vertical force, perpendicular to the axis of the fastening screws 8. The force acting on the support beam 1 causes less wear on the threads of the fastening screws 8, and the fastening screws 8 are less likely to fall off, thereby making the connection between the movable beam 2 and the "U"-shaped support beam 5 more stable. Each flange 1-5 is provided with two interface holes 1-1.

[0065] The supporting beam 1 is also provided with a through-hole 1-2, which corresponds to the first connecting bolt 6 directly above the through-hole 1-2. The through-hole 1-2 is used to provide an escape space for the nut of the first connecting bolt 6 when pulling out. The movable beam 2 can be close to the bottom of the supporting beam 1, ensuring that the movable beam 2 has more space to move upward when pulling out.

[0066] The supporting beam 1 is provided with two groups of through holes 1-4 for pulling out, two groups of threaded holes 1-3 for locking and two groups of through holes 1-2. The spacing between the two groups of through holes 1-4 for pulling out is a, the spacing between the two groups of threaded holes 1-3 for locking is b, and the spacing between the two groups of through holes 1-2 is c.

[0067] The structure of the "X"-shaped support beam 5 is an "X" shape. The "X"-shaped support beam 5 includes a horizontal upper flange 5-3, two horizontal lower flanges 5-4, and two vertical webs 5-5. The ends of the upper flange 5-3 are respectively connected to the corresponding webs 5-5 of the corresponding lower flanges 5-4. For example, the left end of the upper flange 5-3 is connected to the upper end of one web 5-5, and the right end of the upper flange 5-3 is connected to the upper end of another web 5-5. The lower ends of the two webs 5-5 are respectively connected to one lower flange 5-4. The upper flange 5-3 is provided with a fastening threaded hole 5-1, and the lower flange 5-4 is provided with an expansion slot 5-2. The lower flange 5-4 is connected to the chassis 10 through the expansion slot 5-2. For example, bolts are passed through the expansion slot 5-2 on the lower flange 5-4 and then fixed to the chassis 10, thereby realizing a detachable connection between the "X"-shaped support beam 5 and the chassis. The expansion slot 5-2 allows the "X" support beam 5 to be connected to the chassis 10 in multiple locations, thus accommodating the locking and removal of all printed circuit board assemblies 9. The upper flange 5-3 and the two webs 5-5 form a hollow portion 5-6, providing space for the two ends of the movable beam 2 to move up and down. The hollow portion 5-6 also facilitates adjustment of the position of the locking nut 7 on the first connecting bolt 6.

[0068] The top of the movable beam 2 is provided with a locking shallow groove 2-2 for limiting the bottom end of the locking bolt 4. When the locking bolt 4 passes through the locking threaded hole 1-3 of the supporting beam 1, the bottom end of the locking bolt 4 is inserted into the locking shallow groove 2-2. The bottom end of the locking bolt 4 can rotate in the locking shallow groove 2-2 without affecting the rotation of the locking bolt 4. The locking shallow groove 2-2 is located directly below the locking threaded hole 1-3, limiting the bottom end of the locking bolt 4, ensuring that when the locking bolt 4 is tightened or loosened with a torque wrench, the locking bolt 4 is always in a vertical state and will not tilt, thereby avoiding damage to the thread of the locking bolt 4.

[0069] Preferably, the movable beam 2 is provided with two groups of threaded holes 2-3 for pulling out, two groups of shallow grooves 2-2 for locking and two groups of through holes 2-1, the spacing between the two groups of threaded holes 2-3 for pulling out is a, the spacing between the two groups of shallow grooves 2-2 for locking is b, and the spacing between the two groups of through holes 2-1 is c; that is, the spacing between the two groups of through holes 1-4 for pulling out and the spacing between the two groups of threaded holes 2-3 for pulling out are equal and correspond in position; the spacing between the two groups of threaded holes 1-3 for locking and the spacing between the two groups of shallow grooves 2-2 for locking are equal and correspond in position; the spacing between the two groups of through holes 1-2, the spacing between the two groups of through holes 2-1 and the spacing between the two groups of threaded holes 9-4 for pulling out and locking are equal and correspond in position.

[0070] After the first connecting bolt 6 is embedded in the through hole 2-1 on the movable beam 2, the nut of the first connecting bolt 6 is located on one side of the movable beam 2, and the first connecting bolt 6 is located on the other side of the movable beam 2 and the locking nut 7 is inserted. The first connecting bolt 6 and the movable beam 2 are fixedly connected by the locking nut 7 and the nut of the first connecting bolt 6.

[0071] The projections of the corresponding pulling through holes 1-4 and the corresponding pulling threaded holes 2-3 in the vertical direction overlap; the projections of the corresponding locking threaded holes 1-3 and the corresponding locking shallow grooves 2-2 in the vertical direction overlap; the projections of the corresponding through holes 1-2 and the corresponding through holes 2-1 in the vertical direction overlap.

[0072] A method for using a pull-out locker for a printed circuit board assembly, using the above-mentioned pull-out locker for a printed circuit board assembly, and the specific steps are as follows:

[0073] Step 1: Pass four fastening screws 8 through the interface through-hole 1-1 of the support beam 1 to fix the support beam 1 to the fastening threaded holes 5-1 of the two "X" support beams 5 respectively;

[0074] Step 2: The two first connecting bolts 6 are respectively passed through the two corresponding through holes 2 - 1 of the movable beam 2 , and the two locking nuts 7 are screwed into the first connecting bolts 6 on the other side of the movable beam 2 ;

[0075] Step 3: Connect the first connecting bolt 6 on the movable beam 2 to the printed circuit board assembly 9;

[0076] Step 4: The expansion slots 5-2 at both ends of the two "X" support beams 5 are fixed to the chassis 10 respectively;

[0077] Step 5: When locking the printed circuit board assembly 9, the two locking bolts 4 are respectively passed through the locking threaded holes 1-3 of the supporting beam 1, and then screwed into the locking shallow grooves 2-2 corresponding to the movable beam 2. The two locking nuts 7 are locked with the first connecting bolts 6 to achieve a fixed connection between the first connecting bolts 6 and the movable beam 2; use a torque wrench to tighten the two locking bolts 4 respectively, the locking bolts 4 push the movable beam 2 downward, and the movable beam 2 presses the locking nuts 7 to move the first connecting bolts 6 downward, and the first connecting bolts 6 are fixed. The bolt 6 pushes the printed circuit board assembly 9 into the chassis 10. For example, the printed circuit board assembly 9 is pressed down, and the electrical connector plug of the printed circuit board assembly 9 is inserted into the electrical connector socket in the chassis 10 to lock the two, completing the locking operation of the printed circuit board assembly 9; then the first connecting bolt 6 and the printed circuit board assembly 9 can be disassembled and separated, and the "X" support beam 5 can be disassembled and separated from the chassis 10, so as to facilitate the removal of the pull-out locker from the chassis 10 as a whole without increasing the weight of the printed circuit board assembly 9 and the chassis 11.

[0078] Step six, when pulling out the printed circuit board assembly 9, unscrew the two locking bolts 4, and then pass the two pulling bolts 3 through the corresponding pulling through holes 1-4 on the supporting beam 1 in turn, and fix them with the locking threaded holes 1-3 on the movable beam 2. Then, use a torque wrench to tighten the two pulling bolts 3 respectively, and the movable beam 2 moves up with the first connecting bolt 6, and the first connecting bolt 6 drives the printed circuit board assembly 9 to move up, and pulls the printed circuit board assembly 9 out of the chassis 10. For example, the movable beam 2 drives the printed circuit board assembly 9 to move up, and the electrical connector plug of the printed circuit board assembly 9 and the electrical connector socket in the chassis 10 are separated, so that the two are unlocked, which facilitates the pulling out of the printed circuit board assembly 9 and completes the pulling out operation of the printed circuit board assembly 9.

[0079] In this embodiment 1, this embodiment 1 provides a lifting and locking device for a printed circuit board assembly, which includes a supporting beam 1, a movable beam 2, a lifting bolt 3, a locking bolt 4, a first connecting bolt 6 and an "X" support beam 5; an "X" support beam 5 is connected to each end of the supporting beam 1, and the lower end of the "X" support beam 5 is detachably connected to the chassis 10 where the printed circuit board assembly 9 is located. The movable beam 2 is detachably connected to the printed circuit board assembly 9 through the first connecting bolt 6. The locking bolt 4 is threadedly connected to the locking threaded hole 1-3 of the supporting beam 1, and the bottom end of the locking bolt 4 is against the movable beam 2. The two locking bolts 4 are tightened separately using a torque wrench, and the movable beam 2 uses the first connecting bolt 6 to push the printed circuit board assembly 9 into the chassis 10.

[0080] Specific embodiment 2, this embodiment 2 provides a pulling and locking device for a printed circuit board assembly, which includes a supporting beam 1, a movable beam 2, a pulling bolt 3, a locking bolt 4, a first connecting bolt 6 and an "X" support beam 5. The two ends of the supporting beam 1 are respectively connected to an "X" support beam, and the "X" support beam 5 is detachably connected to the chassis 10 where the printed circuit board assembly 9 is located. The movable beam 2 is detachably connected to the printed circuit board assembly 9 through the first connecting bolt 6. The pulling bolt 3 passes through the pulling through holes 1-4 of the supporting beam 1 and is connected to the movable beam 2. A torque wrench is used to tighten the two pulling bolts 3 respectively. The movable beam 2 moves upward with the first connecting bolt 6, and the first connecting bolt 6 drives the printed circuit board assembly 9 to move upward, and the printed circuit board assembly 9 is pulled out from the chassis 10.

[0081] A method for using a pull-out locker for a printed circuit board assembly, using the above-mentioned pull-out locker for a printed circuit board assembly, and the specific steps are as follows:

[0082] Step 1: Connect the two ends of the support beam 1 to an "X" support beam respectively;

[0083] Step 2: Connect and fix the first connecting bolt 6 and the movable beam 2;

[0084] Step 3: Connect the bottom end of the first connecting bolt 6 to the printed circuit board assembly 9;

[0085] Step 4: The two "X"-shaped support beams 5 are respectively connected to the chassis 10 where the printed circuit board assembly 9 is located;

[0086] Step 5: When locking the printed circuit board assembly 9, after the locking bolt 4 is threadedly connected to the supporting beam 1, the bottom end of the locking bolt 4 is against the movable beam 2. The locking bolt 4 is tightened with a torque wrench. The movable beam 2 pushes the first connecting bolt 6 downward (i.e., the first connecting bolt 6 moves away from the supporting beam 1). The first connecting bolt 6 pushes the printed circuit board assembly 9 into the chassis 10.

[0087] Step six, when pulling out the printed circuit board assembly 9, unscrew the locking bolt 4, pass the pulling bolt 3 through the supporting beam 1 and thread it with the movable beam 2, use a torque wrench to tighten the locking bolt 4, and the tightening action of the pulling bolt 3 drives the movable beam 2 to move upward (that is, the first connecting bolt 6 is close to the supporting beam 1), the movable beam 2 moves upward with the first connecting bolt 6, and the first connecting bolt 6 moves upward with the printed circuit board assembly 9, and the printed circuit board assembly 9 is pulled out of the chassis 10.

[0088] In this second embodiment, the support crossbeam 1 and the "X" support beam 5 are assembled as the fixed part to provide a fulcrum, and the movable beam 2 is the movable part that serves as the force application point. By tightening the extraction bolt 3 or the locking bolt 4 with a torque wrench, the threaded connection drives the movable beam 2 up and down, indirectly achieving the downward locking and upward extraction of the printed circuit board assembly 9. This achieves the locking or extraction of the printed circuit board assembly 9, avoiding manual operation, and can quickly and easily lock or remove the printed circuit board assembly 9, effectively solving the problem of difficult extraction and locking of the printed circuit board assembly 9 of high-density electrical connectors. The device is mounted on the chassis 10 and is detachable, without occupying printed circuit board space.

[0089] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0090] Furthermore, the term "first" is used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0091] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A puller and locker for a printed circuit board assembly, characterized in that: The lifting and locking device comprises a supporting crossbeam (1), a movable beam (2), a lifting bolt (3), a locking bolt (4), a first connecting bolt (6) and an "X"-shaped supporting beam (5); the two ends of the supporting crossbeam (1) are respectively connected to an "X"-shaped supporting beam (5); the "X"-shaped supporting beam (5) is detachably connected to a chassis (10) where a printed circuit board assembly (9) is located; and the movable beam (2) is detachably connected to the printed circuit board assembly (9) via the first connecting bolt (6); The pulling bolt (3) passes through the pulling through hole (1-4) of the supporting crossbeam (1) and is then connected to the movable beam (2); The locking bolt (4) is threadedly connected to the locking threaded hole (1-3) of the supporting crossbeam (1), and the bottom end of the locking bolt (4) is abutted against the movable beam (2).

2. The puller and locker for a printed circuit board assembly according to claim 1, characterized in that: The first connecting bolt (6) passes through the through hole (2-1) of the movable beam (2) and is connected to the locking nut (7). The bottom end of the first connecting bolt (6) is detachably connected to the printed circuit board assembly (9).

3. The puller and locker for a printed circuit board assembly according to claim 2, characterized in that: The structure of the "X"-shaped support beam (5) is an "X"-shaped support beam (5). The "X"-shaped support beam (5) comprises a horizontal upper flange (5-3), two horizontal lower flanges (5-4) and two vertical webs (5-5). Two ends of the upper flange (5-3) are respectively connected to the corresponding webs (5-5) of the corresponding lower flanges (5-4). The upper flange (5-3) is provided with a fastening threaded hole (5-1). The lower flange (5-4) is provided with an expansion slot (5-2). The lower flange (5-4) is connected to the chassis (10) through the expansion slot (5-2).

4. The puller and locker for a printed circuit board assembly according to claim 3, characterized in that: The supporting crossbeam (1) is U-shaped, and both ends of the supporting crossbeam (1) are flanged portions (1-5), and both flanged portions (1-5) are provided with interface through holes (1-1); The lifting and locking device comprises two "X"-shaped support beams (5), and the flange portion (1-5) is connected to the side surface of the upper flange (5-3) of the corresponding "X"-shaped support beam (5) through an interface through hole (1-1) and a fastening screw (8).

5. The puller and locker for a printed circuit board assembly according to claim 4, characterized in that: The pulling bolt (3) passes through the pulling through hole (1-4) of the supporting crossbeam (1) and is connected to the pulling threaded hole (2-3) of the movable beam (2); Each flange portion (1-5) is provided with two interface through holes (1-1).

6. The puller and locker for a printed circuit board assembly according to claim 5, characterized in that: The supporting beam (1) is further provided with a through hole (1-2), and the through hole (1-2) corresponds to the top of the first connecting bolt (6); A shallow locking groove (2-2) for limiting the bottom end of a locking bolt (4) is provided on the top of the movable beam (2).

7. The puller and locker for a printed circuit board assembly according to claim 6, characterized in that: The supporting crossbeam (1) is provided with two groups of pulling through holes (1-4), two groups of locking threaded holes (1-3) and two groups of through holes (1-2). The spacing between the two groups of pulling through holes (1-4) is a, the spacing between the two groups of locking threaded holes (1-3) is b, and the spacing between the two groups of through holes (1-2) is c.

8. The puller and locker for a printed circuit board assembly according to claim 7, characterized in that: The movable beam (2) is provided with two groups of threaded holes (2-3) for pulling out, two groups of shallow grooves (2-2) for locking, and two groups of through holes (2-1). The spacing between the two groups of threaded holes (2-3) is a, the spacing between the two groups of shallow grooves (2-2) for locking is b, and the spacing between the two groups of through holes (2-1) is c. The projections of the corresponding extraction through hole (1-4) and the corresponding extraction threaded hole (2-3) in the vertical direction overlap; the projections of the corresponding locking threaded hole (1-3) and the corresponding locking shallow groove (2-2) in the vertical direction overlap; and the projections of the corresponding through hole (1-2) and the corresponding through hole (2-1) in the vertical direction overlap.

9. A method for using a puller and locker for a printed circuit board assembly, using the puller and locker for a printed circuit board assembly according to claim 8, comprising the following steps: Step 1: four fastening screws (8) are passed through the interface through-hole (1-1) of the support beam (1) to fix the support beam (1) to the fastening threaded holes (5-1) of the two "X" support beams (5); Step 2: two first connecting bolts (6) are respectively passed through the two corresponding through holes (2-1) of the movable beam (2), and two locking nuts (7) are screwed into the first connecting bolts (6) on the other side of the movable beam (2); Step 3: Connecting the first connecting bolt (6) on the movable beam (2) to the printed circuit board assembly (9); Step 4: The expansion slots (5-2) at both ends of the two "X"-shaped support beams (5) are fixed to the chassis (10) respectively; Step 5: When locking the printed circuit board assembly (9), the two locking bolts (4) are respectively passed through the locking threaded holes (1-3) of the supporting beam (1), and then screwed into the corresponding locking shallow grooves (2-2) of the movable beam (2). The two locking nuts (7) are locked with the first connecting bolt (6) to achieve a fixed connection between the first connecting bolt (6) and the movable beam (2); the two locking bolts (4) are respectively tightened with a torque wrench, the locking bolts (4) push the movable beam (2) downward, the movable beam (2) presses the locking nuts (7) and the first connecting bolt (6) downward, and the first connecting bolt (6) pushes the printed circuit board assembly (9) into the chassis (10), completing the locking operation of the printed circuit board assembly (9); Step 6: When pulling out the printed circuit board assembly (9), unscrew the two locking bolts (4), and then pass the two pulling bolts (3) through the corresponding pulling holes (1-4) on the supporting beam (1) in sequence, and fix them with the locking threaded holes (1-3) on the movable beam (2). Subsequently, use a torque wrench to tighten the two pulling bolts (3) respectively, and the movable beam (2) moves upward with the first connecting bolt (6), and the first connecting bolt (6) drives the printed circuit board assembly (9) to move upward, and the printed circuit board assembly (9) is pulled out from the chassis (10), completing the pulling out operation of the printed circuit board assembly (9).

10. A method for using a puller and locker for a printed circuit board assembly, using the puller and locker for a printed circuit board assembly according to claim 1, comprising the following steps: Step 1: Connect the two ends of the support beam (1) to a cross-shaped support beam respectively; Step 2: Connect and fix the first connecting bolt (6) and the movable beam (2); Step 3, connecting the bottom end of the first connecting bolt (6) to the printed circuit board assembly (9); Step 4: Two "X"-shaped support beams are respectively connected to the chassis (10) where the printed circuit board assembly (9) is located; Step 5: When locking the printed circuit board assembly (9), the locking bolt (4) is threadedly connected to the supporting beam (1), and the bottom end of the locking bolt (4) is abutted against the movable beam (2). The locking bolt (4) is tightened with a torque wrench, and the movable beam (2) pushes the first connecting bolt (6) downward, and the first connecting bolt (6) pushes the printed circuit board assembly (9) into the chassis (10); Step 6: When pulling out the printed circuit board assembly (9), unscrew the locking bolt (4), pass the pulling bolt (3) through the supporting beam (1) and then connect it to the movable beam (2) through a thread, tighten the locking bolt (4) with a torque wrench, and the tightening action of the pulling bolt (3) drives the movable beam (2) to move upward, and the movable beam (2) moves upward with the first connecting bolt (6), and the first connecting bolt (6) moves upward with the printed circuit board assembly (9), and the printed circuit board assembly (9) is pulled out of the chassis (10).

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