Edge milling machine positioning device for PCB (Printed Circuit Board) processing

Abstract

The invention relates to the technical field of PCB (printed circuit board) processing, in particular to an edge milling machine positioning device for PCB processing, which comprises a box body and further comprises a cover body bolted in the box body and integrally designed in an inverted cone shape; the table body is connected to the upper portion of the surface of the box body in a bolted mode, and the top of the cover body is of an open type design and makes contact with the table body; according to the invention, an air pump connected outside the cover body is started to pump out air in the circular hole body and the cover body to generate negative pressure, the PCB is adsorbed and fixed, the PCB is prevented from being damaged by rigid clamping, and the top of the circular ring and the top of the fixing ring can be flush with each other in a non-air-pumped state through the arrangement of the plugging unit and an accessory structure thereof, so that the PCB is prevented from being damaged. And the top of the circular hole body is blocked, so that the condition that the top of the circular hole body is exposed in a non-working state, so that residual chippings of the table body enter the circular hole body and are sucked into a connected air pump to cause damage is prevented.

Description

Technical Field

[0001] This invention relates to the field of PCB board processing technology, specifically to a positioning device for a router used in PCB board processing. Background Technology

[0002] A PCB board cutting edge machine, also known as a PCB board cutting machine or curve PCB splitting machine, is mainly used to cut PCB boards with stamp hole connections or irregular shapes. It uses a high-speed rotating milling cutter to precisely cut the boards according to a preset program. It can accurately cut the board after assembly, supports board thickness of 0.4-4mm, and is suitable for processing complex contours, such as irregular edges and high-density mounting holes.

[0003] Currently, most PCB routers use rigid positioning pins or hard clamps to directly hold the edge of the PCB board. The hard material directly contacts the edge of the PCB, which can easily cause the board to chip, develop micro-cracks, or peel off the copper foil under vibration and pressure. Summary of the Invention

[0004] The purpose of this invention is to provide a positioning device for a router used in PCB board processing, which uses adsorption to fix the PCB board edge and avoids damage to the PCB board edge.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a positioning device for a router used in PCB board processing, comprising a housing, and further comprising: The cover is bolted to the inside of the box, and the cover has an overall inverted cone shape. The platform is bolted to the top of the box surface, and the top of the cover is an open design that is in contact with the platform. A number of circular holes are arranged on the surface of the platform. The length and width of the distribution range of the circular holes are smaller than the length and width of the opening at the top of the cover. The gravity-triggered switch unit is in a closed state when subjected to gravity. A solenoid valve is connected to the bottom of the cover and is used to connect an external air pump.

[0006] Preferably, the circular hole structure includes: A circular hole is formed through the surface of the platform, and the circular holes are distributed within the opening range at the top of the cover. The inner diameter of the circular hole is 2 to 3 cm. The sealing unit is located in the upper part of the circular hole. When the internal air pressure of the circular hole is normal, the top of the sealing unit is in a flat state. When the internal air pressure of the circular hole is negative, the top of the sealing unit is in a concave state. A gravity-triggered switch unit extends from the top of the circular hole to the upper part of the interior, and is used to control the passage state of the lower part of the circular hole.

[0007] Preferably, the blocking unit includes: A fixing ring is fixed above the interior of the circular hole. The fixing ring has a hole in the middle, and arc grooves are provided on both sides of the hole. A sealing component is used to seal the arcuate groove on the surface of the fixing ring; A support plate is fixed in the circular hole near the center. The surface of the support plate has several ventilation holes arranged in a ring array. The top of the support plate is recessed, and the middle side of the support plate is perforated. The first spring, whose bottom end is in contact with the support plate, is used to apply a force to the sealing member toward the inside and upward of the circular hole.

[0008] Preferably, the sealing element comprises the following structure: The outer diameter of the ring is smaller than the inner diameter of the circle formed by the arc groove on the surface of the fixed ring; A groove is formed on the surface of the ring and is used to fit the connection of the arc grooves on both sides of the surface of the fixed ring. A sleeve is welded to the bottom of the ring, and the upward force of the first spring causes the ring to enter the arc groove on the surface of the fixed ring.

[0009] Preferably, the outer diameter of the sleeve is larger than the inner diameter of the middle hole of the fixing ring.

[0010] Preferably, the gravity-triggered switch unit includes: A vertical cylinder is fixed to the lower part of the interior of the circular hole, and the middle side of the vertical cylinder is hollow. The vertical holes, numbering at least three, are opened through the edge of the surface of the vertical cylinder; The number of transverse grooves is the same as the number of vertical holes. The transverse grooves are opened inside the vertical cylinder and communicate with the vertical holes, dividing the interior of the vertical holes into two parts, one vertically and one horizontally. A sealing block, slidably connected to the inner wall of the transverse groove, is used to control the opening and closing of the vertical hole; A trigger rod, the top of which extends above the circular hole, and a circular plate below the trigger rod; The bottom end of the second spring is fixed to the inner wall of the hollow part of the vertical cylinder, and the top end of the second spring is in contact with the circular plate. An inclined groove component is provided at the bottom of the trigger rod component. The inclined groove component has a bend-shaped design and is hollow. The short column is slidably connected to the inner wall of the hollowed-out part of the inclined groove.

[0011] Preferably, the inclined groove component is composed of an inclined rod and an inclined groove. The inclined rod is connected to the bottom of the trigger rod. The inclined groove is formed on the surface of the inclined rod to make it hollow. The inclined rod is welded to the circular plate. The short column is slidably connected to the inner wall of the inclined groove.

[0012] Preferably, the inclined rod has an overall Z-shaped design, and the inclined groove gradually moves towards the bottom center of the trigger rod.

[0013] Preferably, the triggering rod consists of the movable rod, the rubber block, and the connecting ring. The movable rod is slidably connected to the middle hole of the fixed ring, the sleeve, the middle hole of the support plate, and the inner wall above the interior of the vertical cylinder. The rubber block is fixed to the top of the movable rod. When the movable rod is not subjected to gravity, its top is located above the circular hole. The bottom end of the movable rod is fixed to the inclined rod by screws. The connecting ring is welded to the upper surface of the movable rod.

[0014] Preferably, the outer diameter of the connecting ring is the same as the outer diameter of the sleeve, and the connecting ring is located below the sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention generates negative pressure by turning on the air pump connected to the outside of the cover to extract the air from the circular hole and inside the cover, thereby adsorbing and fixing the PCB, avoiding damage to the PCB caused by rigid clamping.

[0016] 2. By setting up the sealing unit and its auxiliary structure, the present invention can make the top of the circular ring and the top of the fixed ring flush with each other when the air is not evacuated, thereby sealing the top of the circular hole. This prevents the top of the circular hole from being exposed when not in operation, which could cause residual debris from the platform to enter the circular hole and be sucked into the connected air pump, causing damage.

[0017] 3. This invention utilizes a gravity-triggered switch unit and its associated structures. When the PCB is pressed, the trigger rod presses down, causing the inclined slot to move and pull the sealing block to release the vertical hole seal. This creates a negative pressure passage between the cover and the upper part of the circular hole, ensuring that only the circular hole below the PCB is in the passage. This prevents the non-covered area from continuously adsorbing air and debris, reducing the air pump load. Combined with the constant air pressure characteristic after the solenoid valve is closed, energy-saving adsorption is achieved. It can also adaptively adjust according to the length and width of the PCB. The sealing unit and the gravity-triggered switch unit work together. During adsorption, the sealing component descends, opening the top of the circular hole. The sleeve in the sealing component pushes the connecting ring, causing the rubber block to exit the middle hole of the fixing ring, expanding the adsorption area. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure in this invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic cross-sectional view of the box structure in this invention; Figure 4 This is a schematic cross-sectional view of the platform and the cover in this invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the structure of the blocking unit and the gravity-triggered switch unit in this invention; Figure 7 This is a cross-sectional view of the vertical cylinder in this invention; Figure 8 This is a schematic diagram of the trigger rod and the inclined slot in this invention; Figure 9 This is a schematic diagram of the inclined groove component in this invention; Figure 10 This is a schematic diagram of the sealing block in this invention; Figure 11 This is a cross-sectional view of the vertical cylinder in this invention; Figure 12 This is a schematic diagram of the sealing component in this invention; Figure 13 This is a schematic diagram of the structure of the fixing ring in this invention; Figure 14 This is a schematic diagram of the support plate in this invention.

[0019] In the diagram: 100, box body; 200, cover body; 300, circular hole structure; 310, circular hole body; 320, sealing unit; 321, fixing ring; 322, sealing component; 322a, circular ring; 322b, groove; 322c, sleeve; 323, first spring; 324, support plate; 325, vent hole; 330, gravity trigger switch unit; 331, vertical cylinder; 332, vertical hole; 333, second spring; 334, sealing block; 335, circular plate; 336, transverse groove; 337, inclined groove component; 337a, inclined rod; 337b, inclined groove; 338, trigger rod component; 338a, movable rod; 338b, rubber block; 338c, connecting ring; 339, short column; 400, platform body; 500, solenoid valve. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-14As shown, a positioning device for a router used in PCB board processing includes a housing 100, a cover 200, a platform 400, a circular hole structure 300, and a solenoid valve 500. The cover 200 is bolted to the inside of the housing 100 and has an overall inverted conical design. The platform 400 is bolted to the top of the surface of the housing 100. The top of the cover 200 has an open design and is in contact with the platform 400. The solenoid valve 500 is connected to the bottom of the cover 200. In actual use, a bidirectional air pump is connected. By turning on the external bidirectional air pump and opening the solenoid valve 500, the air inside the cover 200 and the circular hole structure 300 is extracted, which can adsorb and fix the PCB board, avoiding damage caused by rigid clamping.

[0022] The circular hole structure 300 includes a circular hole body 310, a blocking unit 320, and a gravity trigger switch unit 330. There are several circular hole structures 300 and they are disposed on the surface of the platform 400. Specifically, the circular hole body 310 is opened through the surface of the platform 400. The length and width of the distribution range of the circular hole structure 300 are smaller than the length and width of the opening at the top of the cover 200. In fact, the circular hole body 310 is distributed within the opening range at the top of the cover 200. The inner diameter of the circular hole body 310 is 2-3 cm. The blocking unit 320 is disposed in the upper part of the interior of the circular hole body 310. When the interior of the circular hole body 310 is under negative pressure, the top of the blocking unit 320 is in a concave state. The top of the gravity trigger switch unit 330 extends to the upper part of the interior of the circular hole body 310 and is used to control the passage state at the lower part of the interior of the circular hole body 310.

[0023] The sealing unit 320 includes a fixing ring 321, a sealing element 322, a support plate 324, and a first spring 323. The fixing ring 321 is fixed to the upper part of the circular hole 310. The fixing ring 321 has a hole in the middle, and arc grooves are provided on both sides of the hole. The sealing element 322 is used to seal the arc grooves on the surface of the fixing ring 321. The support plate 324 is fixed to the middle part of the circular hole 310. Several vent holes 325 arranged in a ring array are provided on the surface of the support plate 324. The top of the support plate 324 is recessed, and the middle side of the support plate 324 has a hole. The bottom end of the first spring 323 is in contact with the support plate 324 and is used to apply a force to the sealing element 322 towards the upper part of the circular hole 310.

[0024] The sealing element 322 consists of a ring 322a, a groove 322b, and a sleeve 322c. The outer diameter of the ring 322a is smaller than the inner diameter of the circle formed by the arc groove on the surface of the fixing ring 321. The groove 322b is formed on the surface of the ring 322a. The sleeve 322c is welded to the bottom of the ring 322a. When the internal air pressure of the circular hole 310 is normal, the top of the sealing unit 320 is in a flat state. Specifically, the upward force of the first spring 323 causes the ring 322a to enter the arc groove on the surface of the fixing ring 321. The groove 322b and the fixing ring 322a are connected. The arc grooves on both sides of the surface of ring 321 fit together, and the outer diameter of sleeve 322c is larger than the inner diameter of the middle hole of fixed ring 321. This allows sleeve 322c to press against the inner wall below fixed ring 321 to prevent ring 322a from rising further. In the non-working state, the top of ring 322a is flush with the top of fixed ring 321, sealing the top of circular hole 310. This prevents the top of circular hole 310 from being exposed in the non-working state, which could cause debris remaining on platform 400 to enter circular hole 310 and be sucked into the connected air pump, causing damage.

[0025] During processing, the PCB board needs to be adsorbed and fixed. The air pump and solenoid valve 500 are turned on. If the lower part of the inside of the circular hole 310 is in a passable state, the air inside the cover 200 and the circular hole 310 is extracted. The air can pass through the vent holes 325 on the surface of the support plate 324, so that the upper part of the inside of the circular hole 310 and the inner side of the fixing ring 321 are in a negative pressure state. The suction force causes the sealing member 322 composed of the circular ring 322a, the groove 322b and the sleeve 322c to descend, so that the inside of the circular hole 310 comes into contact with the bottom of the PCB, adsorbing and fixing the PCB. This allows the device to seal and protect the entrance of the circular hole 310 during idle periods to prevent debris from entering, while also fixing the PCB normally during processing.

[0026] However, during the adsorption and fixation process, the PCB has varying lengths and widths, resulting in some circular holes 310 extending beyond the bottom of the PCB. At this time, the corresponding sealing components 322 inside these circular holes 310 also descend, continuously adsorbing external air. This requires a continuously running air pump to maintain the adsorption force. Furthermore, debris generated during processing can also be sucked into these exposed circular holes 310, causing internal blockage. Therefore, a gravity-triggered switch unit 330 was designed. The gravity-triggered switch unit 330 is activated under gravity... When the force is applied, the circuit is open. Specifically, the gravity-triggered switch unit 330 includes a vertical cylinder 331, vertical holes 332, horizontal grooves 336, a sealing block 334, a trigger rod 338, a second spring 333, a slanted groove 337, and a short column 339. The vertical cylinder 331 is fixed to the lower part of the interior of the circular hole 310. The middle side of the vertical cylinder 331 is hollow. There are at least three vertical holes 332, which are opened through the edge of the surface of the vertical cylinder 331. The number of horizontal grooves 336 is the same as the number of vertical holes 332. A transverse groove 336 is formed inside the vertical cylinder 331 and communicates with the vertical hole 332, dividing the interior of the vertical hole 332 into two parts. A sealing block 334 is slidably connected to the inner wall of the transverse groove 336 to control the opening and closing of the vertical hole 332. The top of the trigger rod 338 extends above the circular hole 310. A circular plate 335 is located below the trigger rod 338. The bottom end of the second spring 333 is fixed to the inner wall of the hollow part of the vertical cylinder 331, and the top end of the second spring 333 contacts the circular plate 335. An inclined groove... 337 is located at the bottom of the trigger rod 338. The inclined groove 337 has a bend-shaped design and is hollow. The inclined groove 337 is composed of an inclined rod 337a and an inclined groove 337b. The inclined rod 337a is connected to the bottom of the trigger rod 338. The inclined groove 337b is opened on the surface of the inclined rod 337a to make it hollow. The inclined rod 337a is welded to the circular plate 335. The short column 339 is slidably connected to the inner wall of the hollow part of the inclined groove 337. Specifically, the short column 339 is slidably connected to the inner wall of the inclined groove 337b.

[0027] Furthermore, the inclined rod 337a has an overall Z-shaped design, and the inclined groove 337b gradually approaches the bottom center of the trigger rod 338. The trigger rod consists of a movable rod 338a, a rubber block 338b, and a connecting ring 338c. The movable rod 338a is slidably connected to the middle hole of the fixed ring 321, the sleeve 322c, the middle hole of the support plate 324, and the inner wall above the interior of the vertical cylinder 331. The rubber block 338b is fixed to the top of the movable rod 338a. When the movable rod 338a is not subjected to gravity, its top is located above the interior of the circular hole 310. The bottom end of the movable rod 338a is fixed to the inclined rod 337a with screws, and the connecting ring 338c is welded to the upper surface of the movable rod 338a.

[0028] Before adsorption and fixation, the upward force of the second spring 333 acts on the surface of the movable rod 338a through the circular plate 335 and the inclined rod 337a. The movable rod 338a moves upward, so that its top and the rubber block 338b are above the fixing ring 321. The movement of the movable rod 338a will not affect the circular ring 322a and the sleeve 322c. The outer diameter of the connecting ring 338c is the same as the outer diameter of the sleeve 322c. At this time, the connecting ring 338c on the surface of the movable rod 338a is below the sleeve 322c and they are in contact with each other. At the same time, the inclined groove 337b on the surface of the inclined rod 337a also moves upward, so that the short column 339 is located inside the inclined groove 337b away from the movable rod 338a. In this process, the sealing block 334 is pushed into the interior of the transverse groove 336 to seal the interior of the vertical hole 332, separating the upper and lower parts inside the vertical hole 332 and putting it in a broken circuit state.

[0029] After the PCB is placed, the rubber block 338b in contact with the PCB is driven by gravity to lower the movable rod 338a and the connecting ring 338c, which in turn pushes the inclined rod 337a and the circular plate 335 down, compressing the second spring 333. Simultaneously, the short column 339 enters the inclined groove 337b near the center of the movable rod 338a, pulling the sealing block 334 away from the inner wall of the transverse groove 336. The sealing block 334 releases the partial blockage of the vertical hole 332, opening it and allowing the lower part of the circular hole 310 to pass through. During the operation of the air pump, air from the upper part of the circular hole 310 enters the cover 200 through the vent 325 and the vertical hole 332, causing the sealing component 322 to descend and expose the upper part of the circular hole 310. This allows for normal adsorption force to fix the PCB. Furthermore, the descent of the sealing component 322... By pushing the connecting ring 338c and the movable rod 338a through its own sleeve 322c, the top rubber block 338b can also be pushed down (after the rubber block 338b is subjected to the pressure of the PCB, although it can drive the movable rod 338a down, it can only make the top of the rubber block 338b flush with the fixed ring 321, and the PCB will not press the rubber block 338b below the top surface of the fixed ring 321). The rubber block 338b further descends in height, exits the middle hole of the fixed ring 321, increases the open area of ​​the top of the circular hole 310, ensures the action surface of the adsorption force, and improves the positioning effect on the PCB; while the movable rod 338a located outside the edge of the PCB is not subjected to gravity pressure, so the lower part of the interior of those circular holes 310 is in a broken circuit state. When the air in the lower part of the interior of the circular hole 310 is extracted, it will not affect the upper part of the vertical hole 332 and the upper part of the interior of the circular hole 310, and the sealing part 322 will not open.

[0030] Therefore, based on the above process, during processing, by setting the gravity-triggered switch unit 330, it is possible to determine which circular holes 310 have lower passages and other circular holes 310 have lower circuits based on the number of movable rods 338a pressed by the PCB. For the circular holes 310 with passages, their corresponding sealing units 320 are opened under negative pressure, allowing the interior of the circular holes 310 to be exposed and in contact with the PCB for adsorption. Circular holes 310 located outside the PCB edge are not triggered by gravity pressure on the movable rods 338a, resulting in lower circuits. Therefore, the sealing units 320 will not be opened under pressure, preventing the circular holes 310 from opening during processing. The debris generated is adsorbed and causes blockage. Moreover, since the PCB is adsorbed and blocks the inlet of the fixing ring 321 corresponding to the lower circular hole 310, the other circular holes 310 are also in a closed state. External air will not continuously enter. It is only necessary to extract the air inside the cover 200 to generate a constant negative pressure (the air pressure can be detected by setting a barometer inside the cover 200). This can adsorb and fix the PCB, and then the external air pump can be turned off. Then the solenoid valve 500 is closed, so that the air pressure inside the cover 200 and the circular hole 310 is always lower than the external air pressure, generating a continuous adsorption force. This continuous force does not require the air pump to be turned on all the time.

[0031] After processing, if it is necessary to release this kind of adsorption force, turn on the air pump (select a bidirectional air pump) to supply air to the inside of the cover 200 and the circular hole 310 to balance the pressure difference between the inside and outside. At this time, the gas returns to the top of the inside of the circular hole 310 through the vertical hole 332 and the vent hole 325. The ring 322a of the sealing component 322 located below the PCB rises again under the action of the first spring 323 to seal the fixed ring 321. Then, the movable rod 338a rises again under the action of the second spring 333, so that the rubber block 338b contacts the bottom of the PCB board. Then the PCB board can be removed.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for a router used in PCB board processing, comprising a housing (100), characterized in that, Also includes: The cover (200) is bolted to the inside of the box (100), and the cover (200) is designed in an inverted cone shape. The platform (400) is bolted to the top of the surface of the box (100), and the top of the cover (200) is an open design and is in contact with the platform (400); A number of circular hole structures (300) are provided on the surface of the platform (400). The length and width of the distribution range of the circular hole structures (300) are smaller than the length and width of the opening at the top of the cover (200). The gravity-triggered switch unit (330) is in a closed state when subjected to gravity. A solenoid valve (500) is connected to the bottom of the cover (200) and is used to connect an external air pump.

2. The positioning device for a router used in PCB board processing according to claim 1, characterized in that, The circular hole structure (300) includes: A circular hole (310) is formed through the surface of the platform (400). The circular holes (310) are distributed within the opening range at the top of the cover (200). The inner diameter of the circular hole (310) is 2 to 3 cm. The sealing unit (320) is disposed in the upper part of the circular hole (310). When the internal air pressure of the circular hole (310) is normal, the top of the sealing unit (320) is in a flat state. When the internal air pressure of the circular hole (310) is negative, the top of the sealing unit (320) is in a concave state. A gravity-triggered switch unit (330) extends above the interior of the circular hole (310) to control the passage state below the interior of the circular hole (310).

3. A positioning device for a router used in PCB board processing according to claim 2, characterized in that, The blocking unit (320) includes: A fixing ring (321) is fixed above the inside of the circular hole (310). The fixing ring (321) has a hole in the middle and arc grooves are provided on both sides of the hole. A sealing component (322) is used to seal the arc groove on the surface of the fixing ring (321); The support plate (324) is fixed in the circular hole (310) near the center. The surface of the support plate (324) is provided with a number of ventilation holes (325) arranged in a ring array. The top of the support plate (324) is recessed and the middle side of the support plate (324) is perforated. The first spring (323), whose bottom end is in contact with the support plate (324), is used to apply a force to the sealing member (322) upward toward the inside of the circular hole (310).

4. A positioning device for a router used in PCB board processing according to claim 3, characterized in that, The sealing element (322) consists of the following structure: The outer diameter of the ring (322a) is smaller than the inner diameter of the circle formed by the arc groove on the surface of the fixed ring (321); A groove (322b) is formed on the surface of the ring (322a) and is used to fit the connection of the arc grooves on both sides of the surface of the fixing ring (321); The sleeve (322c) is welded to the bottom of the ring (322a), and the upward force of the first spring (323) causes the ring (322a) to enter the arc groove on the surface of the fixed ring (321).

5. A positioning device for a router used in PCB board processing according to claim 4, characterized in that, The outer diameter of the sleeve (322c) is larger than the inner diameter of the middle hole of the fixing ring (321).

6. A positioning device for a router used in PCB board processing according to claim 4, characterized in that, The gravity-triggered switch unit (330) includes: A vertical cylinder (331) is fixed to the lower part of the inside of the circular hole (310), and the middle side of the vertical cylinder (331) is hollow. At least three vertical holes (332) are provided and are provided through the edge of the surface of the vertical cylinder (331); The number of transverse grooves (336) is the same as the number of vertical holes (332). The transverse grooves (336) are opened inside the vertical cylinder (331) and communicate with each other with the vertical holes (332), dividing the interior of the vertical holes (332) into two parts. The sealing block (334) is slidably connected to the inner wall of the transverse groove (336) to control the opening and closing of the vertical hole (332); A trigger rod (338) extends to the top of the circular hole (310), and a circular plate (335) is located below the trigger rod (338). The bottom end of the second spring (333) is fixed to the inner wall of the hollow part of the vertical cylinder (331), and the top end of the second spring (333) is in contact with the circular plate (335). A slanted groove (337) is provided at the bottom of the trigger rod (338). The slanted groove (337) is designed in a bend and is hollow. The short column (339) is slidably connected to the inner wall of the hollowed-out part of the inclined groove (337).

7. A positioning device for a router used in PCB board processing according to claim 6, characterized in that, The inclined groove component (337) is composed of an inclined rod (337a) and an inclined groove (337b). The inclined rod (337a) is connected to the bottom of the trigger rod (338). The inclined groove (337b) is formed on the surface of the inclined rod (337a) to make it hollow. The inclined rod (337a) is welded to the circular plate (335). The short column (339) is slidably connected to the inner wall of the inclined groove (337b).

8. A positioning device for a router used in PCB board processing according to claim 7, characterized in that, The inclined rod (337a) has an overall Z-shaped design, and the inclined groove (337b) gradually moves towards the bottom center of the trigger rod (338).

9. A positioning device for a router used in PCB board processing according to claim 7, characterized in that, The triggering rod is composed of the movable rod (338a), the rubber block (338b), and the connecting ring (338c). The movable rod (338a) is slidably connected to the middle hole of the fixed ring (321), the sleeve (322c), the middle hole of the support plate (324), and the inner wall above the inside of the vertical cylinder (331). The rubber block (338b) is fixed to the top of the movable rod (338a). When the movable rod (338a) is not subjected to gravity, its top is located above the circular hole (310). The bottom end of the movable rod (338a) is fixed to the inclined rod (337a) by screws. The connecting ring (338c) is welded to the upper surface of the movable rod (338a).

10. A positioning device for a router used in PCB board processing according to claim 8, characterized in that, The outer diameter of the connecting ring (338c) is the same as the outer diameter of the sleeve (322c), and the connecting ring (338c) is located below the sleeve (322c).

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