A new type of fixing device for PCB board processing

Abstract

The present invention relates to the technical field of circuit board processing equipment, and specifically discloses a novel fixing device for PCB board processing, comprising a workbench and support members detachably connected to inner walls on both sides of the workbench, each support member comprising a support plate and adjustment assemblies respectively provided at both ends of the support plate and used for mounting the PCB board, each adjustment assembly comprising an arc-shaped table, a first telescopic rod and a second telescopic rod respectively mounted on both sides of the arc-shaped table, a sector-shaped table top fixedly connected to the inner side of the arc-shaped table, and a positioning disk coaxial with the sector-shaped table top and rotatably connected to the sector-shaped table top, the upper end surface of the positioning disk is further provided with a positioning structure for fixing the PCB board, main positioning shafts respectively fixed to both ends of the support plate, the main positioning shafts being rotatably connected to the first telescopic rod and the second telescopic rod of the adjustment assembly on the same side, thereby solving the problem that, when a conventional PCB board is mounted on a workbench for processing, only compatible PCB boards can be processed, and PCB boards of other specifications and sizes cannot be processed.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board processing equipment, and specifically discloses a novel fixing device for PCB board processing. Background Art

[0002] PCBs, also known as printed circuit boards, provide electrical connections for electronic components. PCB design primarily involves layout design; the main advantage of using PCBs is that they significantly reduce wiring and assembly errors, improving automation and productivity.

[0003] Based on the above advantages, PCB boards are mainly used in the following four major fields: medical equipment field: such as pH meters, heart rate sensors and temperature measurement; industrial equipment field: such as arc welding, large servo motor drives and clothing cotton machines; lighting application field: such as the application of LED lights; PCB boards can be found everywhere in the automotive and aerospace industries.

[0004] As the use of PCBs increases, the demand for their production is also gradually increasing. During the PCB processing process, the PCB is generally mounted on a work platform to be processed and then secured to the work platform through negative pressure suction. Furthermore, due to the diverse shapes of PCBs, depending on different work requirements and the size of the installation site, PCBs come in many shapes, such as diamonds, rectangles, circles, pentagons, and other irregular shapes. The processing of different PCB types requires the use of different work platforms, and different PCB styles cannot be processed on the same processing platform, resulting in many inconveniences.

[0005] Therefore, in view of this, the inventor provides a new type of fixing device for PCB board processing to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem that when a traditional PCB board is mounted on a work platform for processing, only the adapted PCB board can be processed, and PCB boards of other specifications and sizes cannot be processed.

[0007] To achieve the above objectives, the basic solution of the present invention provides a novel fixture for PCB processing, comprising a workbench and support members detachably connected to the inner walls of both sides of the workbench. The support members each comprise a support plate that is continuously connected to the inner wall of the workbench and an adjustment assembly provided at each end of the support plate for mounting the PCB.

[0008] Each adjustment assembly includes an arc-shaped table, auxiliary positioning shafts respectively fixed to both sides of the lower end surface of the arc-shaped table, a first telescopic rod and a second telescopic rod respectively rotatably connected to the auxiliary positioning shafts on both sides and freely fastened, a sector-shaped table surface fixed to the inner side of the arc-shaped table, and a positioning disk coaxial with the sector-shaped table surface and rotatably connected to the sector-shaped table surface. A toggle table for fixing the positioning disk is also slidably connected to the inner side of the arc-shaped table, and a positioning structure for fixing the PCB board is also provided on the upper end surface of the positioning disk.

[0009] Both ends of the support plate are fixed with main positioning shafts, which are rotatably connected to the first telescopic rod and the second telescopic rod of the adjustment assembly on the same side, and the main positioning shaft is also provided with a fixing structure for fixing the first telescopic rod and the second telescopic rod.

[0010] Furthermore, a connecting plate is detachably connected to the outer side of the support plate, and the connecting plate is detachably connected to the inner wall of the workbench on a side away from the support plate.

[0011] Furthermore, the first telescopic rod includes a first sleeve and a first sliding rod slidably connected to the first sleeve, the upper end surface of the first sliding rod has triangular grooves in a staggered array along the sliding direction, the first sleeve is provided with a card slot near one end of the first sliding rod that can accommodate a single triangular groove to be exposed, and a triangular pin that is engaged with the triangular groove and abuts against the inner wall of the card slot can be placed in the card slot, the first sleeve and the first sliding rod are both provided with a first mounting ring at one end away from each other, and the first mounting ring is respectively rotatably connected to the main positioning shaft and the secondary positioning shaft.

[0012] Furthermore, the second telescopic rod includes a second sleeve and a second sliding rod slidably connected to the second sleeve, the upper end surface of the second sliding rod has triangular grooves in a staggered array along the sliding direction, the second sleeve is provided with a card slot near one end of the second sliding rod that can accommodate a single triangular groove to be exposed, and a triangular pin that is engaged with the triangular groove and abuts against the inner wall of the card slot can be inserted into the card slot, the second sleeve and the second sliding rod are both provided with a second mounting ring at one end away from each other, and the second mounting ring is rotatably connected to the main positioning shaft and the secondary positioning shaft respectively.

[0013] Furthermore, an isolation ring is fixedly connected to the main positioning shaft between the first mounting ring and the second mounting ring, baffles are fixedly connected to both ends of the main positioning shaft, and the fixing structures are respectively arranged on the main positioning shaft on both sides of the isolation ring.

[0014] Furthermore, the fixing structure includes external threads on the main positioning shafts on both sides of the isolation ring and nuts respectively engaged with the external threads, and the end faces of the nuts away from one another are both provided with abutments.

[0015] Furthermore, the positioning structure includes an insertion rod that can be inserted into the positioning hole of the PCB board and limit blocks that are slidably connected to both sides of the insertion rod but cannot slide out completely. Through grooves are provided on both sides of the insertion rod for accommodating the limit blocks and allowing the limit blocks to slide, and third springs are fixed between the through grooves and the limit blocks.

[0016] Furthermore, rounded corners for transition are provided between the bottom end face, the top end face and the side faces of the limiting block.

[0017] Furthermore, the positioning structure also includes a positioning groove provided on the positioning disc and a pressure ring which is slidably connected to the positioning groove and cannot be fully extended from the positioning groove. The insertion rod is slidably connected to the inner side of the pressure ring, and spherical blocks are respectively provided on both sides of the bottom end of the insertion rod. The inner wall of the pressure ring is respectively provided with spherical grooves which can be engaged with the spherical blocks and used to fix the extended position of the insertion rod. A second spring is provided at the bottom end of the pressure ring, and a fourth spring is provided at the bottom end of the insertion rod.

[0018] Furthermore, a manual pressing block is provided at the top end of the insertion rod.

[0019] The principles and effects of this basic solution are:

[0020] 1. The present invention utilizes a support plate and adjustment assemblies on both sides of the support plate to adjust the first and second telescopic rods according to the size and shape of the PCB to be processed. Simultaneously, by rotating the first and second mounting rings on the main positioning shaft, the distance and orientation between the four positioning discs can be adjusted to match the size and shape of the PCB to be processed. This serves as the initial positioning of the PCB during processing.

[0021] 2. During the initial positioning process, the positions of the corresponding arc-shaped platform and the corresponding positioning disc are adjusted by pulling out the first sliding rod, the second sliding rod or pushing the first sliding rod and the second sliding rod inward. After the adjustment is completed, the triangular pin can be inserted into the corresponding triangular groove to complete the fixation of the length of the first telescopic rod and the second telescopic rod. At the same time, the first mounting ring and the second mounting ring are positioned through the fixing structure on the main positioning member to complete the initial positioning.

[0022] 3. After the initial positioning is completed, precise positioning is carried out. By turning the dial table inward and then rotating the positioning disc, the positioning structure on the positioning disc is aligned with the positioning hole on the PCB board. Then, release the dial table to fix the positioning disc and complete the precise positioning.

[0023] 4. After precise positioning is completed, the PCB board can be placed on the positioning disc. At this time, the PCB board will press the pressure ring downward. When the PCB board presses the pressure ring into the positioning groove and is flush with the end face of the positioning disc, the limit block will be released from the pressure ring. At this time, the fourth spring pushes the insertion rod, and the limit block moves synchronously with the insertion rod until the spherical block at the bottom of the insertion rod is placed in the spherical groove. At this time, the limit block is located above the PCB board and contacts the end face of the PCB board. At this time, the PCB board can be fixed for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of a novel fixing device for PCB board processing proposed in an embodiment of the present application is shown;

[0026] Figure 2 A front view of a novel fixing device for PCB board processing proposed in an embodiment of the present application is shown;

[0027] Figure 3 A schematic diagram showing an adjustment component of a novel fixing device for PCB board processing proposed in an embodiment of the present application is shown;

[0028] Figure 4 A schematic diagram of an adjustment assembly of a novel fixing device for PCB board processing proposed in an embodiment of the present application is shown;

[0029] Figure 5 A schematic diagram showing the positioning of a novel fixing device for PCB board processing proposed in an embodiment of the present application is shown;

[0030] Figure 6 A cross-sectional view showing a positioning structure of a novel fixing device for PCB board processing proposed in an embodiment of the present application is shown;

[0031] Figure 7 A schematic diagram of a new type of PCB board processing fixing device proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0033] The reference numerals in the drawings of the specification include: workbench 1, support plate 2, curved table 3, positioning disc 4, first slide bar 5, second sleeve 6, PCB board 7, first sleeve 8, baffle 9, toggle table 10, first mounting ring 11, second mounting ring 12, gear 13, isolation ring 14, sector table 15, pressure ring 16, insertion rod 17, guide table 18, limit block 19, manual pressure block 20.

[0034] A new type of fixing device for PCB board processing, for example Figure 1 As shown:

[0035] The utility model comprises a workbench 1 and supporting members respectively installed on the inner side of the workbench 1 and used for installing a PCB board 7. A rectangular chamber for accommodating the supporting member and the PCB board 7 is opened on the workbench 1.

[0036] Each support member includes a support plate 2 and two groups of adjustment components respectively installed on both sides of the support plate 2.

[0037] A connecting plate can also be mounted on the outside of the support plate 2 using bolts. A boss is integrally formed on each inner wall of the workbench 1, corresponding to the connecting plate. The bosses have first slots formed inside the inner walls of the connecting plate, corresponding to the connecting plate's sidewalls. First clamping blocks are integrally formed on the outer walls of the connecting plate, corresponding to the first slots, and can be inserted into the first slots. The connecting plate and bosses can also be secured using screws.

[0038] The adjustment components each include an arc-shaped platform 3, a positioning disc 4 and two sets of telescopic rods respectively installed at both ends of the arc-shaped platform 3.

[0039] like Figure 4 As shown, the curved platform 3 is generally arc-shaped, with its openings facing away from the support plate 2. A through-hole of equal diameter is provided at each end of the curved platform 3. A sector-shaped platform surface 15 is integrally formed inwardly on the inner side of the curved platform 3, with the center of the sector-shaped platform surface 15 coaxial with the center of the corresponding circle of the curved platform 3. A first arcuate groove is also provided inwardly on the inner side of the curved platform 3, and a second arcuate groove is provided at the junction of the curved platform 3 and the sector-shaped platform surface 15. The two ends of the second arcuate groove extend through the end surfaces of the junction of the curved platform 3 and the sector-shaped platform surface 15.

[0040] Positioning disc 4 is as follows Figure 1 As shown, the overall structure is circular. A toothed disc is mounted at the lower end of the positioning disc 4, coaxially with the positioning disc 4. Several equally spaced teeth are integrally formed on the outer surface of the toothed disc. An axial hole is provided at the center of each of the positioning disc 4 and the toothed disc. A rotating shaft is mounted on the sector-shaped table 15. The positioning disc 4 and the toothed disc are mounted on the sector-shaped table 15 through the axial hole and the rotating shaft, allowing them to rotate on the sector-shaped table 15. A ring is integrally formed on the rotating shaft, and a groove is provided in the axial hole to engage with and accommodate the ring.

[0041] On the lower end surface of the toothed disc, a closed meshing platform is integrally formed. The meshing platform can be placed in the second arc groove and can slide in the second arc groove. Figure 7As shown, a toggle platform 10 is mounted within the first arcuate groove. This wave motion platform is also arcuate, and its center is aligned with the center of the sector-shaped platform 15. Three sets of first springs are mounted between the outer wall of the toggle platform 10 and the inner wall of the first arcuate groove. A guide groove is defined within the bottom surface of the first arcuate groove, and a guide block is integrally formed on the bottom surface of the toggle platform 10, which slides within the groove. Two latching teeth are integrally formed at each end of the toggle platform 10, respectively, to fit between adjacent teeth of the gear disc.

[0042] A positioning structure for fixing the PCB board 7 is also provided on the positioning disc 4 .

[0043] like Figure 3 and Figure 4 As shown, the two groups of telescopic rods respectively include a first telescopic rod and a second telescopic rod.

[0044] The first telescopic rod includes a first sleeve 8 and a first slide bar 5. The first slide bar 5 is slidably installed in the first sleeve 8 and can slide out of the first sleeve 8. A first mounting ring 11 is integrally formed at the free ends of the first sleeve 8 and the first slide bar 5, that is, at the ends away from each other. On the upper end face of the first slide bar 5, there are two mutually staggered triangular grooves arranged in an array along the sliding direction, and on the upper end face of the first sleeve 8, there is a card slot connected to the inner cavity. The card slot can expose a complete triangular groove, and a triangular pin can be inserted inward through the card slot, and the triangular pin can be placed in the triangular groove. When the triangular pin is placed in the triangular groove, the top of the triangular pin is located in the card slot and is flush with the upper end face of the first sleeve 8.

[0045] The second telescopic rod includes a second sleeve 6 and a second slide rod. The second slide rod is slidably installed in the second sleeve 6 and can slide out of the second sleeve 6. A second mounting ring 12 is integrally formed at the free ends of the second sleeve 6 and the second slide rod, that is, at the ends away from each other. On the upper end face of the second slide rod, there are two mutually staggered triangular grooves arranged in an array along the sliding direction, and on the upper end face of the second sleeve 6, there is a card slot connected to the inner cavity. The card slot can expose a complete triangular groove, and a triangular pin can be inserted inward through the card slot, and the triangular pin can be placed in the triangular groove. When the triangular pin is placed in the triangular groove, the top of the triangular pin is located in the card slot and is flush with the upper end face of the first sleeve 8.

[0046] A through hole is formed at each end of the support plate 2, into which a main positioning shaft is fixedly mounted. A secondary positioning shaft is also fixedly mounted at each end of the curved platform 3. A spacer ring 14 is mounted in the middle of the main positioning shaft. A baffle 9 is integrally formed at each end of the main positioning shaft.

[0047] like Figure 3As shown, the first mounting ring 11 on the first slide bar 5 is mounted on the main positioning shaft above the isolation ring 14 and is rotatable on the main positioning shaft. The first mounting ring 11 of the first sleeve 8 is mounted on the secondary positioning shaft outside the curved platform 3 and is also rotatable on the secondary positioning shaft. The second mounting ring 12 on the second slide bar is mounted on the main positioning shaft below the isolation ring 14 and is also rotatable on the main positioning shaft. The second mounting ring 12 of the second sleeve 6 is mounted on the secondary positioning shaft inside the curved platform 3 and is also rotatable on the secondary positioning shaft.

[0048] The secondary positioning shaft is provided with retaining ring grooves for accommodating the second mounting ring 12 and the first mounting ring 11. The second mounting ring 12 and the first mounting ring 11 can only be installed and slide within the retaining ring grooves and cannot fall out of them. The primary positioning shaft is also provided with retaining ring grooves, and these retaining ring grooves are located near both ends of the primary positioning shaft. After being installed on the primary positioning shaft, the first mounting ring 11 and the second mounting ring 12 are respectively close to the inner end surface of the baffle 9.

[0049] External threads are formed on the adjacent main positioning shafts on both sides of the isolation ring 14. A nut is attached to each of these external threads. A stop is integrally formed on the end face of the nut facing the adjacent telescopic rod. By rotating the nut, the nut can be raised or lowered. As the nut above the isolation ring 14 gradually moves upward, the stop contacts the first mounting ring 11, forcing it against the baffle 9, thereby tightening and securing the first mounting ring 11. The second mounting ring 12 is secured in a similar manner.

[0050] The positioning structure is as follows Figure 5 and Figure 6 As shown, the system comprises a pressure ring 16, an insertion rod 17, and two sets of stoppers 19 mounted on either side of the insertion rod 17. Each positioning disc 4 has a positioning groove for accommodating the positioning structure. The pressure ring 16 is mounted within the positioning groove and slides against the inner wall of the groove. The insertion rod 17 is mounted inside the pressure ring 16 and slides against the inner wall of the pressure ring 16.

[0051] Two sliders are integrally formed on both sides of the outer wall of the pressure ring 16, and two slide grooves for sliding with the sliders are respectively opened on the inner walls of the two sides of the positioning groove. Two second springs are installed between the bottom end face of the pressure ring 16 and the bottom surface of the positioning groove.

[0052] A manual pressure block 20 is integrally formed at the top of the insertion rod 17. Two through slots are formed on either side of the insertion rod 17, with two guide platforms 18 integrally formed on either side of the through slots. A limit block 19 is mounted between the two guide platforms 18 on each side, and a horizontal rail is integrally formed on either side of each limit block 19. A horizontal groove is formed on the adjacent side of each guide platform 18, which slides with the horizontal rail. The horizontal groove does not extend to the outer end surface of the guide platform 18. A third spring is installed between the limit block 19 and the inner wall of the through slot.

[0053] A receiving groove is formed on the positioning disc 4 at the bottom end of the positioning groove to accommodate the end of the insertion rod 17. A fourth spring is installed between the insertion rod 17 and the receiving groove. Spherical blocks are also integrally formed on either side of the bottom end of the insertion rod 17, and spherical grooves are formed on the inner side of the pressure ring 16 to receive the spherical blocks.

[0054] When the pressing ring 16 is pressed down by the PCB 7 and the insertion rod 17 pops out, the spherical block will be locked into the spherical groove, thus fixing the position of the insertion rod 17. There are positioning holes distributed around the PCB 7, and at this time, the limit block 19 will pop out of the through groove and be located above the PCB 7, thus fixing the PCB 7.

[0055] In this embodiment, the bottom end of the stopper 19 extends outward for a certain distance before transitioning to a rounded corner and side edge. This portion of the extension is slightly larger than the diameter of the positioning hole on the PCB 7. This ensures a secure hold on the PCB 7. The top end of the stopper 19 transitions directly to a rounded corner, facilitating its removal from the positioning hole on the PCB 7 when the insertion rod 17 is ejected.

[0056] To remove the PCB board 7, manually slide the stopper 19 inward, then manually press the insertion rod 17 downward with the manual pressure block 20. The spherical block will then separate from the spherical groove, and the insertion rod 17 in the positioning hole of the PCB board 7 can be pressed downward. Once this operation is complete, the PCB board 7 can be removed. The pressure ring 16 will then be ejected by the third spring, while the insertion rod 17 will be pressed down to the receiving groove by the manual pressure block 20. The stopper 19 will then be ejected by the fourth spring and abut against the inner wall of the pressure ring 16, securing it. Simultaneously, the sliders and chute on both sides of the bottom end of the pressure ring 16 will limit the pressure ring 16 and prevent it from sliding out.

[0057] When the present invention is used, the support plate 2 is first fixed, and then the first telescopic rod and the second telescopic rod are adjusted according to the shape and size of the PCB board 7 to be processed. After the first telescopic rod and the second telescopic rod are adjusted, the first mounting ring 11 and the second mounting ring 12 mounted on the main positioning shaft are fixed in sequence by screwing the nuts respectively. This is the initial positioning.

[0058] After that, the dial table 10 is moved inward, and then the positioning disc 4 is rotated to make the positioning structure face the positioning hole on the PCB board 7 to be processed. After alignment, the dial table 10 can be loosened to place the inner teeth of the dial table 10 between the teeth on the gear disc, thereby fixing the gear disc and the positioning disc 4. This is precise positioning;

[0059] After accurate positioning is completed, the PCB board 7 can be placed between the positioning discs 4 on all sides and fixed by the positioning structure before processing.

[0060] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A new type of fixing device for PCB board processing, characterized by: It includes a workbench and support members detachably connected to the inner walls of both sides of the workbench, each support member includes a support plate that is continuously connected to the inner wall of the workbench and adjustment components respectively provided at both ends of the support plate and used to install the PCB board; Each adjustment assembly includes an arc-shaped table, auxiliary positioning shafts respectively fixed to both sides of the lower end surface of the arc-shaped table, a first telescopic rod and a second telescopic rod respectively rotatably connected to the auxiliary positioning shafts on both sides and freely fastened, a sector-shaped table surface fixed to the inner side of the arc-shaped table, and a positioning disk coaxial with the sector-shaped table surface and rotatably connected to the sector-shaped table surface. A toggle table for fixing the positioning disk is also slidably connected to the inner side of the arc-shaped table, and a positioning structure for fixing the PCB board is also provided on the upper end surface of the positioning disk. Both ends of the support plate are fixed with main positioning shafts, which are rotatably connected to the first telescopic rod and the second telescopic rod of the adjustment assembly on the same side, and the main positioning shaft is also provided with a fixing structure for fixing the first telescopic rod and the second telescopic rod.

2. A novel fixing device for PCB board processing according to claim 1, characterized in that: The outer side of the support plate is detachably connected with a connecting plate, and the side of the connecting plate away from the support plate is detachably connected to the inner wall of the workbench.

3. A novel fixing device for PCB board processing according to claim 1, characterized in that: The first telescopic rod includes a first sleeve and a first sliding rod slidably connected to the first sleeve. The upper end surface of the first sliding rod has triangular grooves in a staggered array along the sliding direction. The first sleeve is provided with a card slot near one end of the first sliding rod to allow a single triangular groove to be exposed. A triangular pin that engages with the triangular groove and abuts against the inner wall of the card slot can be placed in the card slot. The first sleeve and the first sliding rod are both provided with a first mounting ring at one end away from each other. The first mounting ring is rotatably connected to the main positioning shaft and the auxiliary positioning shaft respectively.

4. A novel fixing device for PCB board processing according to claim 3, characterized in that: The second telescopic rod includes a second sleeve and a second sliding rod slidably connected to the second sleeve. The upper end surface of the second sliding rod has triangular grooves in a staggered array along the sliding direction. The second sleeve is provided with a card slot near one end of the second sliding rod that can accommodate a single triangular groove. A triangular pin that engages with the triangular groove and abuts against the inner wall of the card slot can be placed in the card slot. The second sleeve and the second sliding rod are both provided with a second mounting ring at one end away from each other. The second mounting ring is rotatably connected to the main positioning shaft and the auxiliary positioning shaft respectively.

5. A novel fixing device for PCB board processing according to claim 4, characterized in that: An isolation ring is fixedly connected to the main positioning shaft between the first mounting ring and the second mounting ring. Baffles are fixedly connected to both ends of the main positioning shaft. The fixing structures are respectively arranged on the main positioning shaft on both sides of the isolation ring.

6. A novel fixing device for PCB board processing according to claim 5, characterized in that: The fixing structure includes external threads on the main positioning shafts on both sides of the isolation ring and nuts respectively engaged with the external threads, and the end faces of the nuts away from one end are both provided with abutments.

7. A novel fixing device for PCB processing according to claim 1, characterized in that: The positioning structure includes an insertion rod that can be inserted into the positioning hole of the PCB board and limit blocks that are slidably connected to both sides of the insertion rod but cannot slide out completely. Through grooves are provided on both sides of the insertion rod for accommodating the limit blocks and allowing the limit blocks to slide. Third springs are respectively fixed between the through grooves and the limit blocks.

8. A novel fixing device for PCB processing according to claim 7, characterized in that: Rounded corners for transition are provided between the bottom end face, the top end face and the side faces of the limiting block.

9. A novel fixing device for PCB processing according to claim 8, characterized in that: The positioning structure also includes a positioning groove provided on the positioning disc and a pressure ring that is slidably connected to the positioning groove and cannot be fully extended out of the positioning groove. The insertion rod is slidably connected to the inner side of the pressure ring, and spherical blocks are respectively provided on both sides of the bottom end of the insertion rod. The inner wall of the pressure ring is respectively provided with spherical grooves that can be engaged with the spherical blocks and used to fix the extended position of the insertion rod. A second spring is provided at the bottom end of the pressure ring, and a fourth spring is provided at the bottom end of the insertion rod.

10. A novel fixing device for PCB processing according to claim 9, characterized in that: A manual pressing block is provided on the top end of the insertion rod.

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