An RFID antenna end pin soldering device

Abstract

This invention relates to the field of antenna welding equipment, specifically an RFID antenna end pin welding device. It includes a base plate, a welding torch mounted on the upper side of the base plate, and a central column fixedly installed at the center of the upper side of the base plate. The device also includes a switching mechanism for quickly switching welding points and a straightening mechanism for straightening the antenna end. The switching mechanism utilizes a rotating base plate, a feeding seat, and a pushing component. Through the circumferential rotation of the rotating base plate and the radial sliding of the feeding seat, the feeding seat slides the circuit board on it once for every revolution of the rotating base plate, thus achieving automatic switching of the welding point. The straightening mechanism utilizes a clamping plate, a pressure roller, and a wedge. The wedge triggers a moving component to drive the clamping plate to clamp and straighten the antenna end, while the pressure roller presses down on the antenna end, effectively avoiding incomplete soldering or poor contact caused by antenna bending during the welding process, ensuring welding quality.

Description

Technical Field

[0001] This invention relates to the field of antenna welding equipment, specifically an RFID antenna end pin welding device. Background Technology

[0002] As a key component of a radio frequency identification system, the RFID antenna's terminal pins need to be precisely soldered to two contacts on the circuit board to achieve stable signal transmission. Since RFID antennas are usually made of flexible materials, their terminal pins are prone to bending or shifting during movement. If there is a deviation in the soldering position, it will directly affect the antenna's impedance matching and signal transmission and reception performance. Therefore, ensuring high-precision alignment and reliable fixation of the antenna terminal and the circuit board contacts during the soldering process is an important aspect of improving the overall performance of RFID equipment.

[0003] Existing RFID antenna welding devices mostly consist of a base and a welding torch. During operation, the circuit board needs to be placed on the base manually. After welding the first contact point with the welding torch, the operation needs to be paused and the position of the circuit board needs to be manually adjusted so that the second contact point is moved under the welding torch for secondary welding. This process relies on manual operation, which is not only cumbersome and inefficient, but also prone to welding point displacement due to human error during the position adjustment process, affecting the yield of finished products.

[0004] However, the aforementioned traditional welding equipment lacks the function of correcting the antenna tip. During welding, the antenna tip may not be fully straightened or flattened, resulting in problems such as incomplete welding and poor contact, which further reduces the welding quality.

[0005] Therefore, there is an urgent need for a high-efficiency welding device that can automatically switch welding points and integrate end-point correction functions to address the shortcomings of existing technologies. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an RFID antenna end pin welding device, including a base plate, a welding gun is provided on the upper side of the base plate, and a central column is fixedly installed at the center position of the upper side of the base plate. The device also includes a switching mechanism for quickly switching welding points and a correction mechanism for correcting the antenna end.

[0007] The switching mechanism includes a rotating base plate rotatably disposed outside the central column, a plurality of feeding seats are equally spaced along the circumference of the central column on the rotating base plate, and a pushing component for pushing the feeding seats to slide radially along the central column. When the rotating base plate rotates one revolution, the feeding seat located at the welding gun position drives the circuit board on it to change to another welding point directly below the welding gun.

[0008] The correction mechanism includes two clamping plates and a pressure roller mounted on the feeding seat via a moving component, and a wedge-shaped component fixedly mounted on the right side of the welding gun. When the welding gun is welding, the wedge-shaped component drives the clamping plates to clamp the front and rear sides of the antenna via the moving component, and then moves to the left to straighten the end of the antenna. The pressure roller presses down on the end of the antenna.

[0009] Preferably, the rotating base plate consists of a bearing plate rotatably disposed on the outside of the central column and a plurality of U-shaped plates fixedly mounted on the bearing plate at equal intervals along the circumference of the central column, and the feeding seat slides on the upper side of the horizontal section of the U-shaped plates.

[0010] Preferably, three clamping plates are slidably arranged on the feeding seat, and tension springs are provided between the three clamping plates and the feeding seat. An unlocking component is slidably arranged up and down at the center of the feeding seat, and the unlocking component is hinged to the corresponding clamping plate through a telescopic square rod.

[0011] Preferably, the pushing component includes a fixed column fixedly installed on the upper side of the central column, a guide groove is provided on the outer side of the fixed column, a sliding plate is slidably arranged on the side of the feeding seat near the fixed column, and a slotted component that moves along the guide groove is slidably arranged on the side of the sliding plate near the fixed column along the length direction of the sliding plate.

[0012] Preferably, a guide is slidably provided on the upper side of the fixed column, and the guide is locked to the fixed column by fastening screws. Two symmetrically arranged protruding columns are fixedly installed on the side of the sliding plate near the fixed column, and a push plate is fixedly installed on the upper right end of the central column.

[0013] Preferably, the moving assembly includes a lifting frame that is slidably mounted on the upper end of the feeding seat away from the central column via a guide rod. A feeding frame is slidably mounted on the lifting frame along the radial direction of the central column. The inner side of the feeding frame is hinged to two clamping plates via two sets of connecting rods.

[0014] Preferably, two symmetrically arranged linkage brackets are slidably arranged on the outer side of the feed frame corresponding to the position of the connecting rod. The lower sides of the two linkage brackets are rotatably connected to the pressure roller. The pressure roller is located between the two clamping plates. A helical spring is provided between the linkage brackets and the feed frame.

[0015] Preferably, a locking block is hinged to the upper end of the feeding seat on the side away from the central column, and an adjusting stud is threaded onto the lifting frame. The adjusting stud corresponds to the upper part of the locking block away from its hinge point, and a torsion spring is provided between the locking block and the feeding seat.

[0016] Preferably, a round-headed column is slidably arranged on the feed frame, a push spring is provided between the round-headed column and the feed frame, a hemispherical groove for the round-headed column to be inserted is provided on the lifting frame, and protrusions are fixedly installed at equal intervals along the circumference on the cylindrical surface of the pressure roller.

[0017] Preferably, a toothed square rod is slidably provided on the side of the feeding seat away from the central column, a triangular block for extending into the tooth groove of the toothed square rod is fixedly installed on the lifting frame, and an L-shaped plate for pushing the toothed square rod towards the central column is fixedly installed on the upper rear end of the base plate.

[0018] The beneficial effects of the present invention are as follows: First, the present invention adopts a rotating base plate, a feeding seat and a pushing component in the switching mechanism. Through the circumferential rotation of the rotating base plate and the radial sliding cooperation of the feeding seat, the feeding seat drives the circuit board on it to slide once for every one rotation of the rotating base plate, thereby realizing the automatic switching of the welding point position. There is no need to manually adjust the position of the circuit board, which significantly improves the welding efficiency and reduces human error.

[0019] Second, the present invention uses a clamping plate, a pressure roller and a wedge in the straightening mechanism. The wedge triggers the moving component to drive the clamping plate to clamp the end of the antenna and straighten it. At the same time, the pressure roller presses down on the end of the antenna, which effectively avoids the problem of poor soldering or poor contact caused by the antenna bending during the welding process, ensuring the welding quality. In addition, the protrusion on the pressure roller can also press out the indentation at the end of the antenna, thereby increasing the firmness of the antenna and the circuit board through the anchoring effect.

[0020] Third, the present invention uses three clamping plates and unlocking components on the feeding seat. Through the linkage design of tension spring and telescopic square rod, the circuit board can be quickly clamped and released, which further improves the convenience of welding operation. In addition, the telescopic square rod can also adapt to the clamping of circuit boards with different aspect ratios. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a partial front view of the base plate, welding gun, feeding seat and fixing column in this invention.

[0024] Figure 3 This is a schematic diagram of the structure of the central column, feeding seat, sliding plate and clamping plate in this invention.

[0025] Figure 4 This is a structural schematic diagram of the fixing column, guide groove, and locking slot in this invention.

[0026] Figure 5 This is a schematic diagram of the structure of the feeding seat, unlocking component, clamping plate and locking block in this invention.

[0027] Figure 6 This is a schematic diagram of the structure of the feeding seat, clamping plate, connecting rod and pressure roller in this invention.

[0028] Figure 7 This is a partial sectional view of the material feeding seat, lifting frame, feeding frame and linkage support in this invention.

[0029] Figure 8 This is a partial sectional view of the lifting frame, feeding frame, round-headed column, and triangular block in this invention.

[0030] Figure 9 This is a schematic diagram of the structure of the pressure roller and the protrusion block in this invention.

[0031] In the diagram: 1. Base plate; 2. Welding torch; 3. Central column; 4. Positioning mechanism; 5. Correction mechanism; 31. Pushing ring; 32. Linkage rod; 41. Rotating base plate; 42. Feeding seat; 43. Pushing assembly; 51. Moving assembly; 52. Clamping plate; 53. Pressure roller; 54. Wedge-shaped component; 55. Round-headed column; 56. Toothed square rod; 411. Bearing plate; 412. U-shaped plate; 421. Clamping plate; 422. Unlocking component; 423, Telescopic square rod; 424, Locking block; 431, Fixed column; 432, Guide groove; 433, Sliding plate; 434, Slot component; 435, Guide component; 436, Protruding column; 437, Push plate; 511, Lifting frame; 512, Feeding frame; 513, Connecting rod; 514, Linkage bracket; 515, Adjusting stud; 531, Protruding block; 561, Triangular block; 562, L-shaped plate. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0033] See Figure 1 and Figure 2 An RFID antenna end pin welding device includes a base plate 1, a welding gun 2 disposed on the upper side of the base plate 1, and a central column 3 fixedly installed at the center position of the upper side of the base plate 1. The device also includes a switching mechanism 4 for quickly switching welding points and a correction mechanism 5 for correcting the antenna end.

[0034] When it is necessary to solder the antenna onto the circuit board, the operator manually places the circuit board and the antenna on the transposition mechanism 4 so that the contacts on the circuit board are aligned with the end of the antenna. Then, the transposition mechanism 4 is rotated to move the circuit board and the antenna to the lower part of the welding torch 2. At the same time, the new circuit board and the antenna are placed on the transposition mechanism 4 and the welding torch 2 is moved downward. The welding torch 2 rolls and straightens the end of the antenna through the straightening mechanism 5.

[0035] Then, the welding torch 2 welds the end of the antenna to a contact on the circuit board. Next, the welding torch 2 is reset, and then the circuit board is rotated again by the switching mechanism 4. The end of the antenna that has moved to the position of the welding torch 2 is welded to the circuit board. At the same time, the new circuit board and antenna are placed on the switching mechanism 4.

[0036] When the circuit board and antenna are rotated to the lower part of the welding gun 2 after one contact is welded, the switching mechanism 4 pushes the circuit board and antenna to move, so that the other contact on the circuit board corresponds to the lower part of the welding gun 2. Then the welding gun 2 is moved down, so that the welding gun 2 welds the end of the antenna to the other contact on the circuit board.

[0037] See Figure 1 , Figure 2 and Figure 3 The switching mechanism 4 includes a rotating base plate 41 rotatably disposed outside the central column 3. A plurality of feeding seats 42 are equally spaced along the circumference of the central column 3 on the rotating base plate 41, and a pushing component 43 for pushing the feeding seats 42 to slide radially along the central column 3. When the rotating base plate 41 rotates one revolution, the feeding seat 42 located at the welding gun 2 position drives the circuit board on it to change to another welding point directly below the welding gun 2.

[0038] See Figure 1 , Figure 2 , Figure 3 and Figure 5 Three clamping plates 421 are slidably arranged on the feeding seat 42. Each of the three clamping plates 421 and the feeding seat 42 is provided with a tension spring. An unlocking member 422 is slidably arranged up and down at the center position of the feeding seat 42. The unlocking member 422 is hinged to the corresponding clamping plate 421 through a telescopic square rod 423. A locking block 424 is hinged to the upper end of the feeding seat 42 away from the central column 3. A torsion spring is provided between the locking block 424 and the feeding seat 42. The torsion spring is not shown in the figure.

[0039] In this embodiment, a push ring 31 is fixedly installed on the outer side of the central column 3. The lower front end of the push ring 31 has a downward protruding structure. A linkage rod 32 is fixedly installed on the lower part of the unlocking member 422. When the linkage rod 32 is located in front of the central column 3, the protruding structure of the push ring 31 pushes the linkage rod 32 downward, so that the linkage rod 32 drives the unlocking member 422 to move downward synchronously.

[0040] When the unlocking member 422 moves downward, it drives the telescopic square rod 423 on it to move synchronously. As the tension spring pulls the three clamping plates 421 closer to each other through its own elasticity, the telescopic square rod 423 retracts itself when it starts to move. When the total length of the telescopic square rod 423 is retracted to its shortest, the unlocking member 422 continues to move downward, so that the unlocking member 422 pushes the three clamping plates 421 to move away from each other through the telescopic square rod 423.

[0041] It should be noted that, as Figure 5 As shown, when the circuit board is rectangular and the contacts on the circuit board are located on the long side of the circuit board, the displacement of the clamping plate 421 near the central pillar 3 is greater than that of the other two clamping plates 421. This causes the clamping plate 421 near the central pillar 3 to push the unlocking member 422 upward through the telescopic square rod 423 on it, resulting in a greater movement of the unlocking member 422 than the other two clamping plates 421. Consequently, the unlocking member 422 stretches the telescopic square rods 423 on the two symmetrically arranged clamping plates 421. Then, the operator places the circuit board on the feeding seat 42 located in front of the central pillar 3, with the solder joints on the circuit board on the side away from the central pillar 3. The operator then manually rotates the locking block 424, places the end of the antenna on the feeding seat 42, and manually adjusts the position of the end of the antenna to correspond with the contacts on the circuit board. Afterward, the external force on the locking block 424 is removed, allowing the torsion spring to push the locking block 424 through its own elasticity to clamp and fix the antenna on the feeding seat 42.

[0042] Then the operator manually rotates the rotating base plate 41, so that the rotating base plate 41 drives the circuit board and antenna on it to move to the lower part of the welding gun 2 through the feeding seat 42. During the rotation, the feeding seat 42 drives the unlocking part 422 to move to the right part of the pushing ring part 31, so that the pushing ring part 31 no longer pushes the linkage rod 32 downward, thereby causing the tension spring to pull the three clamping plates 421 closer to each other through its own elasticity, and then clamps and fixes the circuit board on the feeding seat 42.

[0043] When the feeding seat 42 containing the antenna and circuit board rotates to the lower part of the welding gun 2, the feeding seat 42 without the antenna and circuit board rotates synchronously to the front of the central column 3. Then the operator places the new antenna and circuit board on the feeding seat 42, and the placement and locking process is the same as above.

[0044] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The pushing component 43 includes a fixed column 431 fixedly installed on the upper side of the central column 3. A guide groove 432 is provided on the outer side of the fixed column 431. A sliding plate 433 is slidably arranged on the side of the feeding seat 42 near the fixed column 431. A slot 434 that moves along the guide groove 432 is slidably arranged on the side of the sliding plate 433 near the fixed column 431 along the length direction of the sliding plate 433.

[0045] It should be noted that the guide groove 432 consists of two annular grooves arranged vertically and two symmetrically arranged spiral grooves. The spiral grooves are located at the rear of the fixed column 431. The two symmetrically arranged spiral grooves are arranged in an X shape. The spiral grooves connect the ends of the upper annular groove and the ends of the lower annular groove, so that the guide groove 432 forms a closed trajectory.

[0046] It should be noted that the slot component 434 consists of a sliding plate that slides inside the sliding plate 433 and a rotating component that is rotatably disposed on the side of the sliding plate 433 near the fixed post 431. The rotating component slides inside the guide groove 432. A No. 4 spring is provided between the sliding plate and the sliding plate 433. In the initial state, the No. 4 spring is in a compressed state, so that the No. 4 spring pushes the sliding plate towards the fixed post 431 by its own elastic force, thereby making the sliding plate drive the rotating component to always be located inside the guide groove 432.

[0047] See Figure 1 and Figure 2 The rotating base plate 41 is composed of a bearing plate 411 rotatably disposed on the outside of the central column 3 and a number of U-shaped plates 412 fixedly installed on the bearing plate 411 at equal intervals along the circumference of the central column 3. The feeding seat 42 slides on the upper side of the horizontal section of the U-shaped plate 412. A return spring is provided between the feeding seat 42 and a vertical section of the U-shaped plate 412 away from the central column 3.

[0048] In the initial state, the return spring pushes the feeding seat 42 towards the center post 3 with its own elastic force, so that the side of the feeding seat 42 near the center post 3 abuts against a vertical section of the U-shaped plate 412 near the center post 3, thereby ensuring that the contacts of the circuit board on the side away from the center post 3 on the feeding seat 42 can correspond to the area directly below the welding torch 2.

[0049] See Figure 2 , Figure 3 and Figure 4 A guide 435 is slidably provided on the upper side of the fixed column 431. The guide 435 is locked to the fixed column 431 by fastening screws. Two symmetrically arranged protruding columns 436 are fixedly installed on the side of the sliding plate 433 near the fixed column 431. A push plate 437 is fixedly installed on the upper right end of the center column 3.

[0050] In the initial state, the slot 434 located in front of the central column 3 is located inside the annular groove at the bottom of the guide groove 432, so that the slot 434 drives the sliding plate 433 to the lower position, the sliding plate 433 drives the lower protruding column 436 to the same height as the push plate 437, and at the same time, the sliding plate 433 drives the upper protruding column 436 to the bottom of the guide 435.

[0051] It should be noted that the guide component 435 consists of an adjusting plate that is slidably connected to the upper side of the fixed column 431 and two symmetrically arranged limiting plates that are fixedly installed on the lower right side of the adjusting plate. The front part of the limiting plate has an inclined structure, and the rear part of the limiting plate has a longitudinally arranged straight plate structure. The front parts of the two limiting plates form an open structure, and the distance between the straight plate structures of the two limiting plates is equal to the diameter of the protruding column 436.

[0052] The operator moves the guide 435 left and right in advance so that the guide 435 can push the upper protrusion 436 to drive the circuit board to change contact and make contact with the welding gun 2.

[0053] When the feeding seat 42 rotates to the lower part of the welding gun 2, the feeding seat 42 drives the lower protruding column 436 to move to the left of the push plate 437 through the sliding plate 433, so that the push plate 437 abuts against the outside of the lower protruding column 436. Then, through the limiting of the push plate 437 and the U-shaped plate 412 near the vertical section of the center column 3, the position of the feeding seat 42 is fixed to prevent the feeding seat 42 from sliding during welding and to ensure welding accuracy.

[0054] See Figure 1 , Figure 2 and Figure 6 The straightening mechanism 5 includes two clamping plates 52 and a pressure roller 53 set on the feeding seat 42 by a moving component 51, and a wedge 54 fixedly installed on the right side of the welding gun 2. When the welding gun 2 is welding, the wedge 54 drives the clamping plates 52 to clamp the front and rear sides of the antenna by the moving component 51, and then moves to the left to straighten the end of the antenna. The pressure roller 53 presses down on the end of the antenna.

[0055] See Figure 2 , Figure 6 and Figure 7 The moving component 51 includes a lifting frame 511 that is slidably mounted on the upper end of the feeding seat 42 away from the central column 3 via a guide rod. A feeding frame 512 is slidably mounted on the lifting frame 511 along the radial direction of the central column 3. The inner side of the feeding frame 512 is hinged to two clamping plates 52 via two sets of connecting rods 513.

[0056] It should be noted that each set of connecting rods 513 consists of two connecting rods 513 arranged vertically, so that each set of connecting rods 513, the corresponding clamping plate 52 and the corresponding feed frame 512 form a parallelogram structure.

[0057] See Figure 6 , Figure 7 and Figure 9 Two symmetrically arranged linkage brackets 514 are slidably mounted on the outer side of the feed frame 512 corresponding to the position of the connecting rod 513. The lower sides of the two linkage brackets 514 are rotatably connected to the pressure roller 53. The pressure roller 53 is located between the two clamping plates 52. A helical spring is provided between the linkage brackets 514 and the feed frame 512.

[0058] It should be noted that a first spring is provided between the lifting frame 511 and the feeding seat 42, and a second spring is provided between the feeding frame 512 and the lifting frame 511. In the initial state, the first spring pushes the lifting frame 511 upward through its own elastic force, so that the lifting frame 511 drives the clamping plate 52 to be located on the upper part of the circuit board through the connecting rod 513, and so that the clamping plate 52 does not contact the circuit board. At the same time, the second spring pushes the feeding frame 512 through its own elastic force, so that the feeding frame 512 drives the clamping plate 52 to be located away from the central column 3.

[0059] See Figure 6 , Figure 7 and Figure 8 A round-headed column 55 is slidably mounted on the feed frame 512, and a push spring is provided between the round-headed column 55 and the feed frame 512. A hemispherical groove for the round-headed column 55 to be inserted is provided on the lifting frame 511.

[0060] In the initial state, the feed frame 512 drives the round head column 55 to align with the position of the hemispherical groove, so that the push spring pushes the round head column 55 into the interior of the hemispherical groove through its own elastic force, thereby locking the lifting frame 511 and the feed frame 512 together.

[0061] When the feeding seat 42, which holds the antenna and circuit board, rotates to the lower part of the welding gun 2, the welding gun 2 moves downward. The welding gun 2 causes the inclined surface of the wedge 54 to abut against the side of the feed frame 512 away from the central column 3. Since the lifting frame 511 and the feed frame 512 are locked together, the wedge 54 pushes the feed frame 512 downward, causing the lifting frame 511 to move downward synchronously.

[0062] In this embodiment, a cantilever plate is fixedly installed on the upper right side of the base plate 1. The cantilever plate is slidably connected to the welding torch 2. An electric cylinder for driving the welding torch 2 to move up and down is fixedly installed on the cantilever plate.

[0063] The feed frame 512 drives the linkage bracket 514 to move downward synchronously via a helical spring, causing the linkage bracket 514 to drive the pressure roller 53 to abut against the outer side of the antenna end. Then, the wedge 54 continues to move downward, causing the feed frame 512 to drive the lower part of the clamping plate 52 to abut against the circuit board. At the same time, the feed frame 512 compresses the helical spring, and the elastic force of the helical spring pushes the linkage bracket 514 downward, thereby causing the linkage bracket 514 to drive the pressure roller 53 to press firmly against the antenna end.

[0064] The feed frame 512 then continues to move downwards. Since the lower part of the clamping plate 52 is blocked by the circuit board and cannot move downwards, the feed frame 512 pushes the two clamping plates 52 to clamp the outside of the antenna end through the connecting rod 513.

[0065] In this embodiment, a rod is fixedly installed on one of the two clamping plates 52 at the same feed frame 512. The rod is slidably inserted into the other clamping plate 52, thereby ensuring that the height of the two clamping plates 52 at the same feed frame 512 is always the same. This allows the two clamping plates 52 to move symmetrically and clamp the end of the antenna, preventing the antenna from being clamped at an angle.

[0066] See Figure 1 , Figure 2 , Figure 6 and Figure 7 A toothed square rod 56 is slidably provided on the side of the feeding seat 42 away from the central column 3. A triangular block 561 for extending into the tooth groove of the toothed square rod 56 is fixedly installed on the lifting frame 511. An L-shaped plate 562 for pushing the toothed square rod 56 towards the central column 3 is fixedly installed on the upper rear end of the base plate 1. A No. 3 spring is provided between the toothed square rod 56 and the feeding seat 42.

[0067] As the lifting frame 511 moves downward, it intermittently pushes the toothed square rod 56 to the left via the triangular block 561 on it. When the two clamping plates 52 are clamped on the end of the antenna, the lifting frame 511 stops moving downward. At this time, the No. 3 spring pushes the toothed square rod 56 to the right through its own elastic force, so that the triangular block 561 is inserted into the tooth groove of the toothed square rod 56. The horizontal section of the tooth groove of the toothed square rod 56 blocks the upper side of the triangular block 561, preventing the lifting frame 511 from moving upward.

[0068] See Figure 5 , Figure 6 , Figure 7 and Figure 9 The lifting frame 511 is threaded with an adjusting stud 515, which corresponds to the upper part of the locking block 424 away from its hinge point. The pressure roller 53 has protrusions 531 fixedly installed on its cylindrical surface at equal intervals along its circumference.

[0069] The operator rotates the adjusting stud 515 according to the diameter of the antenna end in advance, so that when the two clamping plates 52 are clamped on the antenna end, the adjusting stud 515 abuts against the upper part of the locking block 424, further pushing the locking block 424 to lock the antenna, while preventing the lifting frame 511 from continuing to move downward, causing the two clamping plates 52 to over-clamp the antenna end.

[0070] Next, the wedge 54 is moved downwards again, causing it to push the feed frame 512 to move to the left. The feed frame 512 drives the round-headed column 55 to disengage from the hemispherical groove. The feed frame 512 drives the two clamping plates 52 to move synchronously through the connecting rod 513, so that the two clamping plates 52 straighten the antenna end. At the same time, the feed frame 512 drives the pressure roller 53 to roll against the antenna end through the linkage bracket 514, thereby pressing the antenna end against the contact point of the circuit board to ensure the soldering quality.

[0071] While the pressure roller 53 is rolling the end of the antenna, the protrusion 531 on it rolls out several indentations on the end of the antenna. The indentations form a mechanical locking effect. After the solder penetrates into the indentations and solidifies, it will form a physical anchor point, thereby improving the bonding strength between the antenna and the circuit board.

[0072] When the pressure roller 53 and the clamping plate 52 move to a position where they are no longer in contact with the antenna, the welding torch 2 moves downwards to abut against the contact point on the side of the antenna and the circuit board away from the central post 3, thereby welding the end of the antenna to the contact point on the side of the circuit board away from the central post 3.

[0073] After welding is completed, the welding torch 2 is moved slightly upward so that it is no longer in contact with the antenna. After the flux solidifies, the welding torch 2 is reset upward. At the same time, the second spring pushes the feed frame 512 to the right through its own elastic force. Then the rotating base plate 41 is rotated so that the rotating base plate 41 moves the circuit board to be welded and the antenna to the lower part of the welding torch 2. At the same time, the operator aligns the new circuit board and the antenna and places them on the feeding seat 42 in front of the central column 3.

[0074] The rear-mounted locking bar 56 contacts the front side of the horizontal section of the L-shaped plate 562, causing the L-shaped plate 562 to push the rear-mounted locking bar 56 forward, so that the locking bar 56 no longer blocks the triangular block 561. Then, the first spring pushes the lifting frame 511 upward to reset through its own elastic force, while the welding gun 2 moves downward to weld the contacts on the side of the new circuit board away from the central column 3 to the end of the antenna.

[0075] The rear-mounted slot 434 moves to the spiral groove of the guide groove 432 and drives the sliding plate 433 to move upward along the spiral groove of the guide groove 432. Then, the base plate 41 continues to rotate, causing the slot 434 to move along the spiral groove of the guide groove 432 to the upper annular groove of the guide groove 432. This causes the sliding plate 433 to drive the lower fixed post 431 to move to the upper part of the push plate 437. At the same time, the sliding plate 433 drives the upper fixed post 431 to move to the same height as the guide 435.

[0076] Then, the rotating substrate 41 continues to rotate, causing the circuit board to move to the lower part of the welding gun 2 after welding one contact point. During this process, the sliding plate 433 drives the upper fixed post 431 to move between the two straight segments of the guide member 435, so that the guide member 435 pushes the upper fixed post 431 to the right. The upper fixed post 431 drives the feeding seat 42 to move synchronously through the sliding plate 433, thereby causing the feeding seat 42 to move the contact point of the circuit board near the center post 3 to directly below the welding gun 2. Then, the welding gun 2 is moved downward again for welding, and the principle is the same as above.

[0077] Then, rotating the base plate 41 drives the circuit board with the two contacts soldered to move to the front of the center post 3. During this process, the slot 434 moves along another spiral groove of the guide groove 432 to the lower annular groove of the guide groove 432, so that the two fixed posts 431 move downward and reset. Then, the operator manually changes the circuit board.

[0078] See Figures 1 to 9 The present invention further includes the following steps when soldering the antenna end to the circuit board:

[0079] The first step is for the operator to place the circuit board and antenna on the feeding seat 42 located in front of the central column 3. Then, the operator manually rotates the rotating substrate 41, so that the rotating substrate 41 moves the circuit board and antenna on it to the lower part of the welding gun 2 through the feeding seat 42.

[0080] The second step is to move the welding torch 2 downwards. The welding torch 2 drives the pressure roller 53 to press against the outside of the antenna end through the wedge 54. The feed frame 512 pushes the two clamping plates 52 to clamp the outside of the antenna end through the connecting rod 513. The adjusting stud 515 abuts against the upper part of the locking block 424.

[0081] The third step involves moving the wedge 54 downwards, causing the feed frame 512 to move to the left, driving the two clamping plates 52 to straighten the antenna end. At the same time, the pressure roller 53 rolls against the antenna end, thus pressing the antenna end against the contacts on the circuit board to ensure welding quality.

[0082] Fourth step, the welding torch 2 is moved downwards to abut against the contact point on the side of the antenna and the circuit board away from the central post 3, thereby welding the end of the antenna to the contact point on the side of the circuit board away from the central post 3. After welding is completed, the welding torch 2 is moved upwards slightly so that the welding torch 2 is no longer in contact with the antenna. After the flux solidifies, the welding torch 2 is reset upwards.

[0083] Fifth step, rotate the rotating base plate 41 one revolution, so that the rotating base plate 41 moves the circuit board and antenna with one contact point welded to the lower part of the welding gun 2 again. During this process, the guide 435 pushes the upper fixed post 431 to move the contact point of the circuit board near the center post 3 to the lower part of the welding gun 2. Then the welding gun 2 is moved down again to weld.

[0084] The sixth step involves rotating the base plate 41 to move the circuit board with the two contacts soldered to the front of the center post 3. During this process, the slot 434 moves along another spiral groove of the guide groove 432 to the lower annular groove of the guide groove 432, causing the two fixed posts 431 to move downward and reset. Then, the operator manually changes the circuit board.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered within the protection scope of the present invention.

Claims

1. An RFID antenna end pin welding device, comprising a base plate, wherein a welding torch is disposed on the upper side of the base plate, characterized in that, A central column is fixedly installed at the center of the upper side of the base plate. The device also includes a transposition mechanism for quickly switching welding points and a correction mechanism for correcting the antenna end. The switching mechanism includes a rotating base plate rotatably disposed outside the central column, a plurality of feeding seats are equally spaced along the circumference of the central column on the rotating base plate, and a pushing component for pushing the feeding seats to slide radially along the central column. When the rotating base plate rotates one revolution, the feeding seat located at the welding gun position drives the circuit board on it to change to another welding point directly below the welding gun. The correction mechanism includes two clamping plates and a pressure roller set on the feeding seat by a moving component, and a wedge-shaped component fixedly installed on the right side of the welding gun. When the welding gun is welding, the wedge-shaped component drives the clamping plates to clamp the front and rear sides of the antenna by the moving component, and then moves to the left to straighten the end of the antenna. The pressure roller presses down on the end of the antenna. The pushing component includes a fixed column fixedly installed on the upper side of the central column, a guide groove is provided on the outer side of the fixed column, a sliding plate is slidably arranged on the side of the feeding seat near the fixed column, and a slotted component that moves along the guide groove is slidably arranged on the side of the sliding plate near the fixed column along the length direction of the sliding plate. The upper side of the fixed column is provided with a guide member that slides left and right. The guide member is locked to the fixed column by fastening screws. Two symmetrically arranged protruding columns are fixedly installed on the side of the sliding plate near the fixed column. A push plate is fixedly installed on the upper right end of the central column. The moving component includes a lifting frame that is slidably mounted on the upper end of the feeding seat away from the central column via a guide rod. A feeding frame is slidably mounted on the lifting frame along the radial direction of the central column. The inner side of the feeding frame is hinged to two clamping plates via two sets of connecting rods. Two symmetrically arranged linkage brackets are slidably installed on the outer side of the feed frame corresponding to the position of the connecting rod. The lower side of the two linkage brackets is rotatably connected to the pressure roller. The pressure roller is located between the two clamping plates. A helical spring is installed between the linkage brackets and the feed frame. A locking block is hinged to the upper end of the feeding seat on the side away from the central column. An adjusting stud is threaded onto the lifting frame. The adjusting stud is positioned above the locking block away from its hinge point. A torsion spring is provided between the locking block and the feeding seat. A round-headed column is slidably mounted on the feed frame, and a push spring is provided between the round-headed column and the feed frame. A hemispherical groove for the round-headed column to be inserted is provided on the lifting frame, and protrusions are fixedly installed at equal intervals along the circumference of the cylindrical surface of the pressure roller. A toothed square rod is slidably provided on the side of the feeding seat away from the central column. A triangular block for extending into the tooth groove of the toothed square rod is fixedly installed on the lifting frame. An L-shaped plate for pushing the toothed square rod towards the central column is fixedly installed on the upper rear end of the base plate.

2. The RFID antenna end pin welding device according to claim 1, characterized in that, The rotating base plate consists of a support plate rotatably disposed on the outside of the central column and several U-shaped plates fixedly installed on the support plate at equal intervals along the circumference of the central column. The feeding seat slides on the upper side of the horizontal section of the U-shaped plate.

3. The RFID antenna end pin welding device according to claim 1, characterized in that, Three clamping plates are slidably arranged on the feeding seat. Each of the three clamping plates is connected to the feeding seat by a tension spring. An unlocking component is slidably arranged up and down at the center of the feeding seat. The unlocking component is hinged to the corresponding clamping plate through a telescopic square rod.

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