A fixing device for opening a hole in a printed circuit board

Abstract

The present invention relates to the technical field of fixing devices, and more specifically, to a fixing device for opening a hole in a printed circuit board, comprising a fixing shell, a connecting base plate and a drill bit, wherein the bottom end of the inner wall of the fixing shell is provided with a connecting base plate through a telescopic mechanism, and the middle part of the bottom end of the connecting base plate is provided with a drill bit through a disassembly mechanism, and the middle part of the top end of the fixing shell is connected with a load-bearing base plate through an adjustment mechanism. The present invention can be applied to circuit boards of different sizes, is not limited to any environment, improves the functionality of the device during use, improves the working efficiency of the device during use, and can relatively conveniently adjust the height of the bearing base plate, is applicable to circuit boards of different thicknesses, improves the practicality of the device during use, and further can relatively conveniently replace the drill bit, improves the convenience of the device during use, saves working time during replacement, and improves the applicability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of fixing devices, in particular to a fixing device for opening a hole in a printed circuit board. Background Art

[0002] After the printed circuit board is etched, a hole needs to be opened on the substrate to facilitate the subsequent installation and fixation of the circuit board. The traditional printed circuit board hole opening fixing device basically meets people's needs, but there are still some problems.

[0003] Traditional circuit boards vary in thickness and length, so different fixing devices need to be used according to circuit boards of different sizes when opening holes. This operation method affects the convenience of the device during use due to limited space, which in turn affects the work efficiency of the device during use. Therefore, there is an urgent need for a fixing device for opening holes in a printed circuit board to solve the above problems. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a fixing device for opening a hole in a printed circuit board, which can solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fixing device for opening a hole in a printed circuit board, comprising a fixed shell, a connecting base plate and a drill bit, wherein the bottom end of the inner wall of the fixed shell is equipped with a connecting base plate through a telescopic mechanism, and the middle part of the bottom end of the connecting base plate is equipped with a drill bit through a disassembly mechanism, the middle part of the top end of the fixed shell is connected to a load-bearing base plate through an adjustment mechanism, and the top end of the load-bearing base plate is connected to a load-bearing base plate through a lifting mechanism.

[0006] Furthermore, the adjusting mechanism includes a first limiting groove, a first sliding rail, a first block, a reverse threaded rod, a threaded block and a turntable. The first limiting groove is fixedly installed in the middle of the top end of the fixed shell, and a first sliding rail is opened in the middle of the top end of the first limiting groove. Two groups of first blocks are slidably connected to the inner side of the first sliding rail. The top end of the first slider is fixedly installed in the middle of the bottom end of the threaded block. The threaded blocks are all connected to the outer wall of the reverse threaded rod through threads. The top left side of the reverse threaded rod is connected to the lower middle end of the inner wall of the fixed shell through a bearing, and the top right side of the reverse threaded rod passes through the outer wall of the fixed shell and is equipped with a turntable.

[0007] Furthermore, the lifting mechanism includes a first fixed bottom block, a first hinged support rod, a threaded connecting rod, a second hinged support rod, a second fixed bottom block, a threaded fixing rod, a knob and a limited bottom block, the first fixed bottom block is fixedly installed on the middle part of the top end of the load-bearing bottom plate, and the front end of the first fixed bottom block is connected to the first hinged support rod through a rotating shaft, the end of the first hinged support rod away from the first fixed bottom block is installed between another rotating shaft and the bottom end of the threaded connecting rod, the threaded connecting rod is connected to the outer wall of the threaded fixing rod through threads, the inner top end of the threaded fixing rod is installed with a limited bottom block through a bearing, the outer top end of the threaded fixing rod is installed in the middle part of the inner side of the knob through another bearing, the top end of the threaded connecting rod is installed with the outer bottom end of the second hinged support rod through a rotating shaft, the top end of the second hinged support rod is installed on the outer wall of the front end of the second fixed bottom block through another rotating shaft, the top end of the second fixed bottom block is fixedly installed in the middle part of the bottom end of the load-bearing bottom plate, the outer top end of the load-bearing bottom plate is fixedly installed with an L-shaped support rod, and the inner side of the L-shaped support rod is installed with an extrusion bottom plate through a limiting mechanism.

[0008] The cam is an L-shaped support rod, and the cam is an L-shaped support rod with a first end fixed to the bottom of the inner side of the support rod. The cam is fixed to the bottom of the L-shaped support rod and the second end fixed to the bottom of the L-shaped support rod. The cam is fixed to the bottom of the L-shaped support rod and the second end fixed to the bottom of the L-shaped support rod.

[0009] Furthermore, the telescopic mechanism includes a motor, a movable telescopic rod, a sliding fixed rod, a connecting top plate, a fourth slider, a second slide rail and a limiting sleeve frame. The sliding fixed rods are fixedly installed on the top ends of both sides of the connecting bottom plate, and the top ends of the sliding fixed rods are fixedly installed in the middle of the bottom end of the connecting top plate. The fourth sliders are fixedly installed in the middle of both sides of the connecting top plate. The fourth sliders are all slidably connected to the inner side of the second slide rail. The second slide rails are symmetrically opened in the middle of the inner wall of the limiting sleeve frame. The top end of the limiting sleeve frame is fixedly installed on the top end of the inner wall of the fixed shell. The movable telescopic rod is fixedly installed in the middle of the top end of the connecting bottom plate, and the top end of the movable telescopic rod is installed in the middle of the bottom end of the motor through a bearing.

[0010] Furthermore, the disassembly and assembly mechanism includes a limit mounting block, a third limit slot, a second slide bar, a third slide block, a second spring, a pull rod, a fourth limit slot, a limit plug rod, a protective cushion, a fixed plug block and a limit mounting plate. The limit mounting plate is symmetrically mounted on the outer wall of the top end of the drill bit, and the top end of the limit mounting plate is fixedly mounted with a fixed plug block. The top end of the fixed plug block is inserted into the inner side of the fourth limit slot. The fourth limit slot is symmetrically arranged at the bottom end of the outer wall of the limit mounting block. The middle part of the inner wall of the fixed plug block is inserted with a limit plug rod. The outer top end of the limiting plug rod is fixedly installed in the middle of the inner side of the pull rod, the top end of the pull rod is fixedly installed in the middle of the bottom end of the third slider, the third slider is slidably connected to the outer wall of the second slider, the second slider is fixedly installed in the middle of the inner wall of the third limiting groove, the third limiting groove is opened in the middle of the top end of the fourth limiting groove, the middle part of the inner side of the third slider is welded with a second spring, and the inner top end of the second spring is welded to the middle of the inner wall of the third limiting groove, and the middle part of the second spring is surrounded on the outer wall of the second slider.

[0011] Furthermore, the inner top end of the limiting plug rod abuts against the middle part of the outer wall of the protective cushion, and the inner top end of the protective cushion is glued to the middle part of the inner wall of the fourth limiting groove.

[0012] Furthermore, the outer wall of the sliding fixing rod is in contact with the outer wall on the inner side of the ball, and a fixed outer frame is fixedly installed in the middle of the outer wall of the ball, the fifth sliding block is fixedly installed at the upper and lower ends of the outer side of the fixed outer frame, and the fifth sliding block is slidably connected to the inner side of the third sliding rail, the third sliding rail is symmetrically arranged at the upper and lower ends of the inner wall of the fifth limiting groove, the fifth limiting groove is symmetrically arranged on the outer wall of the bottom end of the limiting sleeve frame, the third spring is welded in the middle of the outer wall of the fixed outer frame, and the outer top end of the third spring is welded to the middle of the inner wall of the fifth limiting groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The fixing device for opening a hole in a printed circuit board is provided with an adjustment mechanism. At this time, the turntable is rotated according to the size of the circuit board, so that the spacing between the two groups of bearing base plates is adjusted under the rotation action of the threaded connection of the reverse threaded rod and the threaded block. At this time, the pull plate is pulled upward under the sliding action of the second slider and the first slide bar until the distance between the bottom end of the extrusion base plate and the top end of the bearing base plate is large enough to allow the circuit board to be placed. At this time, the pull plate is released, so that the position of the circuit board is limited under the action of the elastic potential energy of the first spring. The above structure can be applied to circuit boards of different sizes without being restricted to any environment, thereby improving the functionality of the device during use and improving the working efficiency of the device during use.

[0015] At the same time, a height adjustment device is provided. If the thickness of the circuit board is too thin or too thick, the knob is turned at this time, so that the support angle between the second hinged support rod and the first hinged support rod and the second fixed bottom block and the first fixed bottom block is adjusted under the action of the threaded connection between the threaded connecting rod and the threaded fixing rod. Through the above structure, the height of the bearing bottom plate can be adjusted relatively conveniently, which is suitable for circuit boards of different thicknesses, and improves the practicality of the device during use;

[0016] At the same time, a disassembly and assembly mechanism is provided. When the pull rod is pulled outward under the sliding action of the second slide rod and the third slide block, the inner top end of the limit plug rod is driven to disengage from the locked plug-in state between the fixed plug block. At this time, the limit mounting plate is lowered and pulled out until the drill bit is peeled off from the bottom end of the connecting base plate. The above structure can replace the drill bit relatively conveniently, which improves the convenience of the device during use, saves working time during the replacement process, and improves the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 A partially enlarged three-dimensional structural schematic diagram of the middle extruded bottom plate;

[0020] Figure 3 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0021] Figure 4 It is a front cross-sectional structural schematic diagram of the present invention;

[0022] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0023] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0024] Figure 7 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0025] Figure 8 For the present invention Figure 4The enlarged structural diagram at D in the middle;

[0026] Fig. 9 For the present invention Figure 4 Enlarged structural diagram at E in the middle.

[0027] Description of the drawings: 1. Fixed housing; 2. First limiting groove; 3. First slide rail; 4. First slider; 5. Reverse threaded rod; 6. Threaded block; 7. Turntable; 8. Load-bearing bottom plate; 9. First fixed bottom block; 10. First hinged support rod; 11. Threaded connecting rod; 12. Second hinged support rod; 13. Second fixed bottom block; 14. Threaded fixing rod; 15. Turning knob; 16. Limiting bottom block; 17. Load-bearing bottom plate; 18. L-shaped support rod; 19. Active connecting rod; 20. Extrusion bottom plate; 21. Limiting fixing plate; 22. Pull plate; 23. Connecting fixing rod; 24. Second slider; 25. First slide rod; 26. Second limiting groove; 27. The first spring; 28. Support side rod; 29. ​​Motor; 30. Movable telescopic rod; 31. Connecting bottom plate; 32. Limit mounting block; 33. Third limiting slot; 34. Second slide bar; 35. Third slider; 36. Second spring; 37. Pull rod; 38. Fourth limiting slot; 39. Limiting plug rod; 40. Protective cushion; 41. Fixed plug block; 42. Limit mounting plate; 43. Drill bit; 44. Sliding fixed rod; 45. Connecting top plate; 46. Fourth slider; 47. Second slide rail; 48. Limit sleeve frame; 49. Fifth limiting slot; 50. Third spring; 51. Fixed outer frame; 52. Ball bearing; 53. Fifth slider; 54. Third slide rail. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-9 As shown, an embodiment of the present invention provides: a fixing device for opening a hole in a printed circuit board, comprising a fixed shell 1, a connecting base plate 31 and a drill bit 43, the connecting base plate 31 is installed at the bottom end of the inner wall of the fixed shell 1 through a telescopic mechanism, and the drill bit 43 is installed at the middle part of the bottom end of the connecting base plate 31 through a disassembly mechanism, the middle part of the top end of the fixed shell 1 is connected to a load-bearing base plate 8 through an adjustment mechanism, and the top end of the load-bearing base plate 8 is connected to a load-bearing base plate 17 through a lifting mechanism.

[0030] The adjusting mechanism comprises a first limiting groove 2, a first slide rail 3, a first slider 4, a reverse threaded rod 5, a threaded block 6 and a turntable 7. The first limiting groove 2 is fixedly installed in the middle of the top end of the fixed shell 1, and a first slide rail 3 is opened in the middle of the top end of the first limiting groove 2. Two groups of first sliders 4 are slidably connected to the inner side of the first slide rail 3. The top end of the first slider 4 is fixedly installed in the middle of the bottom end of the threaded block 6. The threaded blocks 6 are all connected to the outer wall of the reverse threaded rod 5 through threads. The top left side of the reverse threaded rod 5 is connected to the middle lower end of the inner wall of the fixed shell 1 through a bearing. The top right side of the reverse threaded rod 5 passes through the outer wall of the fixed shell 1 and is installed with a turntable 7. Its function is to be applicable to circuit boards of different sizes without being restricted to any environment, thereby improving the functionality of the device during use and improving the working efficiency of the device during use.

[0031] The lifting mechanism includes a first fixed bottom block 9, a first hinged support rod 10, a threaded connecting rod 11, a second hinged support rod 12, a second fixed bottom block 13, a threaded fixing rod 14, a knob 15 and a limit bottom block 16. The first fixed bottom block 9 is fixedly installed in the middle of the top of the load-bearing bottom plate 8, and the front end of the first fixed bottom block 9 is connected to the first hinged support rod 10 through a rotating shaft. The end of the first hinged support rod 10 away from the first fixed bottom block 9 is installed between another rotating shaft and the bottom end of the threaded connecting rod 11. The threaded connecting rod 11 is connected to the outer wall of the threaded fixing rod 14 through a thread. The inner top of the threaded fixing rod 14 is installed with a limit bottom block 16 through a bearing. 14 The top of its outer side is installed on the middle part of the inner side of the knob 15 through another bearing, the top of the threaded connecting rod 11 is installed with the outer bottom end of the second hinged support rod 12 through a rotating shaft, the top of the second hinged support rod 12 is installed on the front end outer wall of the second fixed bottom block 13 through another rotating shaft, the top of the second fixed bottom block 13 is fixedly installed on the middle part of the bottom end of the bearing bottom plate 17, the top of the outer side of the bearing bottom plate 17 is fixedly installed with an L-shaped support rod 18, and the inner side of the L-shaped support rod 18 is installed with an extrusion bottom plate 20 through a limiting mechanism, which can relatively conveniently adjust the height of the bearing bottom plate 17, is suitable for circuit boards of different thicknesses, and improves the practicability of the device during use.

[0032] The limiting mechanism includes a movable connecting rod 19, a limiting fixing plate 21, a pulling plate 22, a connecting fixing rod 23, a second slider 24, a first sliding rod 25, a second limiting groove 26, a first spring 27 and a supporting side rod 28. Two groups of supporting side rods 28 are symmetrically installed at the inner bottom end of the L-shaped supporting rod 18, and the bottom ends of the supporting side rods 28 are fixedly installed on both sides of the top of the limiting fixing plate 21. The middle part of the inner side of the supporting side rod 28 is provided with a second limiting groove 26, and the middle part of the inner wall of the second limiting groove 26 is fixedly installed with a first sliding rod 25, and the outer wall of the first sliding rod 25 is slidably connected to the second slider 24, and the upper and lower ends of the second slider 24 are A first spring 27 is welded, and the outer top end of the first spring 27 is welded around the outer wall of the first sliding rod 25. A connecting fixing rod 23 is fixedly installed in the middle of the inner side of the second sliding block 24. The inner top end of the connecting fixing rod 23 is fixedly installed in the middle of the outer wall of the movable connecting rod 19. The top end of the movable connecting rod 19 passes through the top end of the L-shaped support rod 18 and is fixedly installed in the middle of the bottom end of the pull plate 22. The bottom end of the pull plate 22 passes through the middle of the limiting fixing plate 21 and is fixedly installed in the middle of the top end of the extrusion bottom plate 20. Its function is to limit the position of the circuit board under the action of the limiting mechanism, thereby improving the convenience of the device during use.

[0033] The telescopic mechanism includes a motor 29, a movable telescopic rod 30, a sliding fixed rod 44, a connecting top plate 45, a fourth slider 46, a second slide rail 47 and a limiting sleeve frame 48. The sliding fixed rods 44 are fixedly installed on the top ends of both sides of the connecting bottom plate 31, and the top ends of the sliding fixed rods 44 are fixedly installed on the middle of the bottom end of the connecting top plate 45. The fourth sliders 46 are fixedly installed on the middle ends of both sides of the connecting top plate 45. The fourth sliders 46 are all slidably connected to the inner side of the second slide rail 47. The second slide rails 47 are symmetrically arranged in the middle of the inner wall of the limiting sleeve frame 48. The top ends of the limiting sleeve frames 48 are all fixedly installed on the top end of the inner wall of the fixed shell 1. The movable telescopic rod 30 is fixedly installed in the middle of the top end of the connecting bottom plate 31, and the top end of the movable telescopic rod 30 is installed in the middle of the bottom end of the motor 29 through a bearing. Its function is to cooperate with the lifting mechanism to perform drilling fine adjustment under the action of the telescopic mechanism, thereby improving the practicability of the device during use.

[0034] The disassembly and assembly mechanism includes a limit mounting block 32, a third limit slot 33, a second slide bar 34, a third slide block 35, a second spring 36, a pull rod 37, a fourth limit slot 38, a limit plug rod 39, a protective cushion 40, a fixed plug block 41 and a limit mounting plate 42. The limit mounting plate 42 is symmetrically installed on the outer wall of the top end of the drill bit 43, and the top end of the limit mounting plate 42 is fixedly installed with a fixed plug block 41. The top end of the fixed plug block 41 is inserted into the inner side of the fourth limit slot 38. The fourth limit slot 38 is symmetrically arranged at the bottom end of the outer wall of the limit mounting block 32. A limit plug rod 39 is inserted in the middle of the inner wall of the fixed plug block 41, and the outer top end of the limit plug rod 39 is fixedly installed in the middle of the inner side of the pull rod 37. The top of each of the third sliders 35 is fixedly mounted at the middle of the bottom of the third slider 35, the third sliders 35 are slidably connected to the outer wall of the second slider 34, the second slider 34 is fixedly mounted at the middle of the inner wall of the third limiting groove 33, the third limiting groove 33 is arranged at the middle of the top of the fourth limiting groove 38, the middle of the inner side of the third slider 35 is welded with a second spring 36, and the inner top of the second spring 36 is welded to the middle of the inner wall of the third limiting groove 33, the middle of the second spring 36 surrounds the outer wall of the second slider 34, and its function is to relatively conveniently replace the drill bit 43, improve the convenience of the device during use, save working time during replacement, and improve the applicability of the device.

[0035] The inner top end of the limiting rod 39 abuts against the middle of the outer wall of the protective pad 40, and the inner top end of the protective pad 40 is glued to the middle of the inner wall of the fourth limiting groove 38. Its function is to avoid the inner top end of the limiting rod 39 directly contacting the middle of the inner wall of the fourth limiting groove 38, thereby improving the integrity of the device during use.

[0036] The outer wall of the sliding fixed rod 44 is all in contact with the outer wall on the inner side of the ball 52, and the middle part of the outer wall of the ball 52 is fixedly installed with a fixed outer frame 51, the upper and lower ends of the outer side of the fixed outer frame 51 are fixedly installed with a fifth slider 53, and the fifth slider 53 is slidably connected to the inner side of the third slide rail 54, the third slide rail 54 is symmetrically arranged at the upper and lower ends of the inner wall of the fifth limiting groove 49, the fifth limiting groove 49 is symmetrically arranged on the outer wall of the bottom end of the limiting sleeve 48, the middle part of the outer wall of the fixed outer frame 51 is welded with a third spring 50, and the outer top end of the third spring 50 is welded to the middle part of the inner wall of the fifth limiting groove 49, which can make the sliding fixed rod 44 slide in and out of the outer wall of the bottom end of the limiting sleeve 48 relatively smoothly, thereby improving the stability of the device during use.

[0037] Working principle:

[0038] At this time, the turntable 7 is rotated according to the size of the circuit board, so that the distance between the two groups of supporting base plates 17 is adjusted under the rotation of the threaded connection of the reverse threaded rod 5 and the threaded block 6. At this time, the pull plate 22 is pulled upward under the sliding action of the second slider 24 and the first slider 25 until the distance between the bottom end of the extrusion base plate 20 and the top end of the supporting base plate 17 is large enough to place the circuit board. At this time, the pull plate 22 is released, so that the position of the circuit board is limited under the action of the elastic potential energy of the first spring 27;

[0039] If the thickness of the circuit board is too thin or too thick, the knob 15 is turned to adjust the support angle between the second hinged support rod 12 and the first hinged support rod 10 and the second fixed bottom block 13 and the first fixed bottom block 9 under the action of the threaded connection between the threaded connecting rod 11 and the threaded fixing rod 14;

[0040] The pull rod 37 is pulled outward under the sliding action of the second slide bar 34 and the third slide block 35, and the inner top end of the limit rod 39 is driven to disengage from the locked plug-in state between the fixed plug block 41. At this time, the limit mounting plate 42 is lowered and pulled down until the drill bit 43 is peeled off from the bottom end of the connecting base plate 31, and the operation is completed.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A fixing device for opening a hole in a printed circuit board, comprising a fixing housing (1), a connecting bottom plate (31) and a drill bit (43), wherein the connecting bottom plate (31) is mounted on the bottom end of the inner wall of the fixing housing (1) via a telescopic mechanism, and the drill bit (43) is mounted on the middle of the bottom end of the connecting bottom plate (31) via a disassembly mechanism, the middle of the top end of the fixing housing (1) is connected to a load-bearing bottom plate (8) via an adjustment mechanism, and the top end of the load-bearing bottom plate (8) is connected to a load-bearing bottom plate (17) via a lifting mechanism; Features: The adjustment mechanism comprises a first limiting groove (2), a first slide rail (3), a first slider (4), a reverse threaded rod (5), a threaded block (6) and a rotating disk (7); the first limiting groove (2) is fixedly mounted at the middle of the top end of the fixed housing (1); a first slide rail (3) is provided at the middle of the top end of the first limiting groove (2); two groups of first sliders (4) are slidably connected to the inner side of the first slide rail (3); the top end of the first slider (4) is fixedly mounted at the middle of the bottom end of the threaded block (6); the threaded block (6) is connected to the reverse threaded rod (5) by threads. The left top end of the reverse threaded rod (5) is connected to the lower end of the middle part of the inner wall of the fixed housing (1) through a bearing, and the right top end of the reverse threaded rod (5) passes through the outer wall of the fixed housing (1) and is equipped with a turntable (7); the lifting mechanism comprises a first fixed bottom block (9), a first hinged support rod (10), a threaded connecting rod (11), a second hinged support rod (12), a second fixed bottom block (13), a threaded fixing rod (14), a knob (15) and a limit bottom block (16); the middle part of the top end of the load-bearing bottom plate (8) is fixedly installed A first fixed bottom block (9) is provided, and the front end of the first fixed bottom block (9) is connected to a first hinged support rod (10) via a rotating shaft, and one end of the first hinged support rod (10) away from the first fixed bottom block (9) is installed between the bottom end of a threaded connecting rod (11) via another rotating shaft, and the threaded connecting rod (11) is connected to the outer wall of a threaded fixing rod (14) via a thread, and the inner top end of the threaded fixing rod (14) is installed with a limited bottom block (16) via a bearing, and the outer top end of the threaded fixing rod (14) is installed with a limited bottom block (16) via another bearing. Installed in the middle of the inner side of the knob (15), the top end of the threaded connecting rod (11) is installed with the outer bottom end of the second hinged support rod (12) through a rotating shaft, the top end of the second hinged support rod (12) is installed on the front end outer wall of the second fixed bottom block (13) through another rotating shaft, the top end of the second fixed bottom block (13) is fixedly installed in the middle of the bottom end of the bearing bottom plate (17), the outer top end of the bearing bottom plate (17) is fixedly installed with an L-shaped support rod (18), and the inner side of the L-shaped support rod (18) is installed with an extrusion bottom plate (20) through a limiting mechanism.

2. A fixing device for opening a printed circuit board according to claim 1, characterized in that: The limiting mechanism comprises a movable connecting rod (19), a limiting fixing plate (21), a pulling plate (22), a connecting fixing rod (23), a second sliding block (24), a first sliding rod (25), a second limiting groove (26), a first spring (27) and a supporting side rod (28). Two groups of supporting side rods (28) are symmetrically mounted on the inner bottom end of the L-shaped supporting rod (18), and the bottom ends of the supporting side rods (28) are fixedly mounted on both sides of the top of the limiting fixing plate (21). The middle part of the inner side of the supporting side rod (28) is provided with a second limiting groove (26), the middle part of the inner wall of the second limiting groove (26) is fixedly mounted with a first sliding rod (25), and the outer wall of the first sliding rod (25) is provided with a second limiting groove (26). The walls are all slidably connected with a second slider (24), the upper and lower ends of the second slider (24) are welded with a first spring (27), and the outer top end of the first spring (27) is welded around the outer wall of the first slide bar (25), and the middle part of the inner side of the second slider (24) is fixedly installed with a connecting and fixing rod (23), and the inner top end of the connecting and fixing rod (23) is fixedly installed in the middle of the outer wall of the movable connecting rod (19), the top end of the movable connecting rod (19) passes through the top end of the L-shaped support rod (18) and is fixedly installed in the middle of the bottom end of the pull plate (22), and the bottom end of the pull plate (22) passes through the middle of the limit fixing plate (21) and is fixedly installed in the middle of the top end of the extrusion bottom plate (20).

3. A fixing device for opening a printed circuit board according to claim 1, characterized in that: The telescopic mechanism comprises a motor (29), a movable telescopic rod (30), a sliding fixed rod (44), a connecting top plate (45), a fourth slider (46), a second slide rail (47) and a limiting sleeve (48). The sliding fixed rods (44) are fixedly mounted on the top ends of both sides of the connecting bottom plate (31), and the top ends of the sliding fixed rods (44) are fixedly mounted on the middle of the bottom end of the connecting top plate (45). The fourth sliders (46) are fixedly mounted on the middle ends of both sides of the connecting top plate (45). The fourth sliders (46) are slidably connected to the inner side of the second slide rail (47). The second slide rails (47) are symmetrically arranged in the middle of the inner wall of the limiting sleeve (48). The top ends of the limiting sleeve (48) are fixedly mounted on the top end of the inner wall of the fixed housing (1). The movable telescopic rod (30) is fixedly mounted on the middle end of the top end of the connecting bottom plate (31), and the top end of the movable telescopic rod (30) is mounted on the middle end of the bottom end of the motor (29) through a bearing.

4. A fixing device for opening a printed circuit board according to claim 1, characterized in that: The disassembly and assembly mechanism comprises a limit mounting block (32), a third limit slot (33), a second slide bar (34), a third slide block (35), a second spring (36), a pull rod (37), a fourth limit slot (38), a limit plug rod (39), a protective cushion (40), a fixed plug block (41) and a limit mounting plate (42); the limit mounting plate (42) is symmetrically mounted on the outer wall of the top end of the drill bit (43), and the top end of the limit mounting plate (42) is fixedly mounted with a fixed plug block (41); the top end of the fixed plug block (41) is inserted into the inner side of the fourth limit slot (38); the fourth limit slot (38) is symmetrically arranged at the bottom end of the outer wall of the limit mounting block (32); and the middle part of the inner wall of the fixed plug block (41) is inserted with a limit The insert rod (39) is fixedly mounted on the middle part of the inner side of the pull rod (37), the top of the pull rod (37) is fixedly mounted on the middle part of the bottom end of the third slider (35), the third slider (35) is slidably connected to the outer wall of the second slider (34), the second slider (34) is fixedly mounted on the middle part of the inner wall of the third limiting groove (33), the third limiting groove (33) is opened in the middle part of the top of the fourth limiting groove (38), the middle part of the inner side of the third slider (35) is welded with a second spring (36), and the inner top of the second spring (36) is welded to the middle part of the inner wall of the third limiting groove (33), and the middle part of the second spring (36) surrounds the outer wall of the second slider (34).

5. A fixing device for opening a printed circuit board according to claim 4, characterized in that: The inner top end of the limiting plug rod (39) abuts against the middle of the outer wall of the protective cushion (40), and the inner top end of the protective cushion (40) is glued to the middle of the inner wall of the fourth limiting groove (38).

6. A fixing device for opening a printed circuit board according to claim 3, characterized in that: The outer wall of the sliding fixed rod (44) is in contact with the outer wall of the inner side of the ball (52), and a fixed outer frame (51) is fixedly installed in the middle of the outer wall of the ball (52). The upper and lower ends of the outer side of the fixed outer frame (51) are fixedly installed with a fifth sliding block (53), and the fifth sliding block (53) is slidably connected to the inner side of the third sliding rail (54). The third sliding rail (54) is symmetrically arranged at the upper and lower ends of the inner wall of the fifth limiting groove (49). The fifth limiting groove (49) is symmetrically arranged on the outer wall of the bottom end of the limiting sleeve frame (48). The middle of the outer wall of the fixed outer frame (51) is welded with a third spring (50), and the outer top end of the third spring (50) is welded to the middle of the inner wall of the fifth limiting groove (49).

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