Pin press-fitting equipment for circuit board

Abstract

The invention relates to the technical field of PIN press fitting, in particular to PIN press fitting equipment for a circuit board, which comprises a storage tube for storing PINs, a pressing tube for pressing force application is slidably connected to the top of the outer wall of the storage tube in a sleeving manner, and two vertically parallel push rods are fixedly connected to the outer wall of the pressing tube; the lower ends of the two pushing rods are fixedly connected with penetrating frames, the opposite ends of the penetrating frames are fixedly connected with guide pipes used for guiding the PINs to move downwards, the inner walls of the guide pipes are communicated with the penetrating frames, the central axes of the guide pipes are coaxial with the storage pipes, and therefore the conveying coaxiality of the PINs is guaranteed. According to the PIN press-fitting equipment for the circuit board, the press-fitting efficiency and the automation degree are improved, the equipment integrates the integrated process of feeding, clamping, press-fitting and resetting, an additional feeding system is not needed, single-piece sequential press-fitting can be automatically completed only by putting PINs into a storage pipe in batches, the time consumed for single-piece press-fitting is shortened, the press-fitting efficiency is guaranteed, continuous manual intervention is not needed, and the production cost is reduced. The labor intensity is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PIN needle press fitting, in particular to a PIN needle press fitting equipment for circuit board. BACKGROUND

[0002] PIN needle is the core component for realizing electrical connection, signal transmission or structural fixation of circuit board, and the press fitting quality of PIN needle directly affects the conduction performance and service life of circuit board. At present, in the production process of circuit board, PIN needle press fitting mainly relies on two ways: Manual press fitting mode: the operator clamps the PIN needle by tweezers, manually aligns the PIN needle with the pin hole of the circuit board, and then presses and fixes. This mode has obvious defects: first, the efficiency is extremely low, and it takes about 10-15 seconds to press fit a single PIN needle, which is difficult to adapt to batch production demand; second, the press fitting precision is poor, and uneven manual force can easily lead to PIN needle tilting, inconsistent insertion depth, and even PIN needle bending and circuit board pad damage; third, the labor intensity is large, and long-time operation can easily lead to hand fatigue of personnel, further reducing the press fitting qualification rate. Traditional mechanical press fitting equipment: the existing automatic press fitting equipment adopts a structure of "feeder + cylinder pressure head", which solves the problem of manual efficiency, but still has the following problems: complex structure, independent feeder system and power system are required, the equipment is large in size and high in cost, and is not suitable for small factories or laboratory scenes; poor clamping stability, the traditional equipment adopts rigid clamping, which can easily scratch the surface plating of PIN needle, and PIN needle sticking and material jamming can easily occur during the feeding process, leading to press fitting interruption. With the development of circuit board towards miniaturization and high density, higher requirements are put forward for the precision (error ≤0.1mm), efficiency (single press fitting time ≤3 seconds) and compatibility of PIN needle press fitting, and the existing mode has been difficult to meet the industry demand, and a PIN needle press fitting equipment with compact structure, high precision, convenient adjustment and controllable cost is urgently needed. SUMMARY

[0003] The present application aims to provide a PIN needle press fitting equipment for circuit board to solve the problems of low press fitting efficiency and poor press fitting precision in the background art. To achieve the above-mentioned purpose, the present application provides the following technical scheme: a PIN needle press fitting equipment for circuit board, comprising a storage tube for storing PIN needles, a pressing tube slidingly sleeved on the top of the outer wall of the storage tube for pressing force, two vertical parallel push rods fixedly connected to the outer wall of the pressing tube; the lower end of each push rod is fixedly connected to a penetrating frame, and the opposite ends of the penetrating frame are fixedly connected to a guide tube for guiding the downward movement of the PIN needle, the inner wall of the guide tube is communicated with the penetrating frame and the central axis is coaxial with the storage tube, so as to ensure the coaxiality of PIN needle conveying; Two horizontal grooves are opened on both sides of the interspersed frame, and the sliding blocks are slidably connected in the horizontal grooves. The sliding blocks are hingedly connected with the fixed spring telescopic rods for ensuring clamping stability. The upper ends of the fixed spring telescopic rods are hingedly connected with the push rod, which can assist the wedge-shaped block in stably clamping the surface of the PIN pin. The interspersed frame is interspersed with the wedge-shaped block for clamping the PIN pin. One end of the wedge-shaped block is a reverse L-shaped arc, and the end is bonded with the soft pad for protecting the surface of the PIN pin. The other end is fixedly connected with the guide convex rods on the front and back sides for guiding and resetting. The fixed block is fixedly connected with the outer sleeve, and the outer sleeve is sleeved on the outside of the storage tube. The inner wall of the outer sleeve is fixedly connected with the wedge-shaped push block for pushing the wedge-shaped block to clamp. The wedge-shaped push block and the wedge-shaped block are in the same vertical plane, which ensures that the wedge-shaped block can accurately contact the stress.

[0004] Preferably, the outer wall of the storage tube is fixedly connected with the fixed tube, and the inner wall of the fixed tube is provided with a guide groove. The guide groove is composed of an upper inclined groove, an upper vertical groove, a lower inclined groove and a lower vertical groove from top to bottom. A pressure rod is slidably connected in the fixed tube in the vertical direction. The outer wall of the pressure rod is fixedly connected with a guide block matched with the guide groove. The guide block is slidably arranged in the guide groove, which can drive the pressure rod to move synchronously. The side surface of the pressure rod is slidably sleeved with a rotatable rotating tube. The rotating tube is rotatably connected to the upper end of the fixed tube. The outer wall of the rotating tube is fixedly connected with a clamping plate for clamping adjacent PIN pins. The clamping plate is arranged in the arc-shaped through groove formed on the outside of the storage tube, and a rubber pressing sleeve for increasing clamping friction is bonded on the clamping plate.

[0005] Preferably, a compression spring for resetting is sleeved on the upper end of the side surface of the pressure rod. The upper end of the compression spring abuts against the upper end cover of the pressure rod, and the lower end abuts against the lower end of the rotating tube, which can drive the pressure rod to move upward for resetting after the equipment is used. The side surface of the pressure rod is movably sleeved with a connecting sleeve for connecting the guide tube. The connecting sleeve is fixed to the outer wall of the guide tube, so that the guide tube can move downward to synchronously drive the pressure rod. The lower end of the pressure rod is fixedly connected with a spline spring telescopic rod for stably driving the PIN pin to move downward. The spline spring telescopic rod can ensure that the PIN pin stably follows when the guide tube moves downward after the wedge-shaped block clamps the PIN pin. The inner rod of the spline spring telescopic rod is fixedly sleeved with a pressing sleeve at the upper end. The top surface of the pressing sleeve abuts against the bottom surface of the connecting sleeve. The lower end of the spline spring telescopic rod is fixedly connected with a baffle for initially supporting the PIN pin, which can be removed when the pressure rod rotates to allow the PIN pin to move downward.

[0006] Preferably, the inner wall of the outer sleeve is fixedly connected with four resetting extrusion rods for resetting the wedge-shaped block. The resetting extrusion rods are located above the wedge-shaped push block and correspond to the four guide convex rods and are in the same vertical plane. The resetting extrusion rods can abut against the guide convex rods to drive the wedge-shaped block to return to the original position and release the clamping when the equipment is reset.

[0007] Preferably, a vertical fixing groove is opened on the outer side of the outer sleeve, and a positioning bolt for controlling the depth of the insertion pin is slidably and rotatably connected in the vertical fixing groove; The positioning bolt is located at one end of the inner wall of the outer sleeve, below the pressure sleeve, and is used to limit the maximum downward movement of the pressure sleeve, thereby adjusting the depth of the PIN pin insertion into the circuit board.

[0008] Preferably, the bottom of the outer sleeve has an opening for the PIN pin to pass through, and the central axis of the opening is coaxial with the storage tube to ensure that the PIN pin can be accurately inserted into the pin hole of the circuit board.

[0009] Preferably, a roller for reducing friction is rotatably connected to the inclined surface of the wedge block, which can reduce the sliding resistance when the wedge block contacts the wedge push block.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention improves pressing efficiency and automation: The equipment integrates a "feeding-clamping-pressing-resetting" process, eliminating the need for an additional feeding system. Simply place the PIN pins into the storage tube in batches to automatically complete the pressing of each pin sequentially, shortening the pressing time per pin, ensuring pressing efficiency, and reducing labor intensity by eliminating the need for continuous manual intervention. This invention ensures pressing accuracy and product qualification rate: The "wedge block + soft pad" clamping structure provides flexible clamping of the PIN pin's upper end, preventing scratches on the plating. Simultaneously, the elasticity compensation of the fixed spring telescopic rod ensures uniform clamping force and prevents PIN pin tilting. The design of the positioning bolt and vertical fixing groove allows for precise control of the pressing depth (adjustment accuracy ≤ 0.05mm) by simply adjusting the bolt height, adapting to the assembly requirements of different PIN pin specifications and circuit boards. The coordinated use of the guide grooves (upper inclined groove - upper vertical groove - lower inclined groove - lower vertical groove) and guide blocks enables the clamping plate to simultaneously fix and separate adjacent PIN pins, avoiding misalignment caused by PIN pin adhesion during pressing.

[0011] This invention features a compact structure and convenient operation: the entire device adopts a coaxial design of "storage tube-outer sleeve-pressure rod", which is small in size and easy to move and adapt to the work station; the pressing operation only requires three steps: "lowering the device for alignment-pressing the pressing tube-separating the device", and the automatic reset design of the pressing rod and the pressure spring eliminates the need for manual reset, further simplifying the operation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 This is a three-dimensional cross-sectional view of the outer sleeve of the present invention; Figure 4 For the present inventionFigure 3 Enlarged view of the structure at point B in the middle; Figure 5 This is a three-dimensional structural cross-sectional view of the outer sleeve of the present invention from a side perspective; Figure 6 For the present invention Figure 5 Enlarged view of the structure at point C; Figure 7 This is a three-dimensional structural cross-sectional view of the storage tube, pressing tube, and outer sleeve of the present invention from a side view. Figure 8 This is a three-dimensional structural cross-sectional view of the storage tube of the present invention from a side view. Figure 9 This is a three-dimensional structural diagram of the connecting sleeve and spline spring telescopic rod of the present invention from a side view. Figure 10 This is a top-view three-dimensional cross-sectional view of the storage tube of the present invention.

[0013] In the diagram: 1. Storage tube; 2. Pressing tube; 3. Push rod; 4. Insertion frame; 41. Horizontal groove; 42. Slider; 43. Fixed spring telescopic rod; 44. Wedge block; 45. Guide protrusion; 46. Soft pad; 47. Roller; 5. Guide tube; 6. Fixing block; 7. Outer sleeve; 71. Reset pressing rod; 72. Vertical fixing groove; 73. Positioning bolt; 8. Wedge-shaped push block; 9. Fixing tube; 91. Guide groove; 92. Pressing rod; 93. Guide block; 94. Rotating tube; 95. Clamping plate; 96. Arc-shaped through groove; 97. Rubber pressure sleeve; 98. Compression spring; 99. Connecting sleeve; 910. Splined spring telescopic rod; 911. Pressure sleeve; 912. Baffle. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1 to 10 The present invention provides a technical solution: a PIN pin pressing device for circuit boards, including a storage tube 1, a pressing tube 2 slidably sleeved on the top of the outer wall of the storage tube 1, two vertically parallel push rods 3 fixedly connected to the outer wall of the pressing tube 2, an insertion frame 4 fixedly connected to the lower end of each of the two push rods 3, a guide tube 5 fixedly connected to the opposite end of the insertion frame 4, and the inner wall of the guide tube 5 communicating with the insertion frame 4, and the central axis of the guide tube 5 being coaxial with the central axis of the storage tube 1; Two transverse grooves 41 are provided on both the front and rear sides of the insertion frame 4. A slider 42 is slidably connected in the transverse groove 41. A fixed spring telescopic rod 43 is hinged on the slider 42. The upper end of the fixed spring telescopic rod 43 is hinged to the push rod 3. The extension force of the fixed spring telescopic rod 43 ensures the stability of the clamping force when the wedge block 44 moves relative to the surface of the PIN needle.

[0016] A wedge block 44 is inserted inside the interlacing frame 4. One end of the wedge block 44 is an inverted L-shaped arc, and a soft pad 46 is glued to the inverted L-shaped end of the wedge block 44. Guide protrusions 45 are fixedly connected to both the front and rear sides of the other end of the wedge block 44. Two fixing blocks 6 are fixedly connected to the outside of the storage tube 1. An outer sleeve 7 is fixedly connected to the fixing block 6. The outer sleeve 7 is on the outside of the storage tube 1. A wedge-shaped push block 8 is fixedly connected to the inner wall of the outer sleeve 7, and the wedge-shaped push block 8 and the wedge-shaped block 44 are on the same vertical plane.

[0017] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, two fixed tubes 9 are fixedly connected to the outer wall of the storage tube 1, and the two fixed tubes 9 and the two push rods 3 are distributed in a "+" shape. A guide groove 91 is provided on the inner wall of the fixed tube 9. The guide groove 91 consists of an upper inclined groove, an upper vertical groove, a lower inclined groove and a lower vertical groove from top to bottom. A pressure rod 92 is vertically slidably connected inside the fixed tube 9. A guide block 93 is fixedly connected to the outer wall of the pressure rod 92. The guide block 93 is slidably disposed in the guide groove 91. The side of the pressure rod 92 is slidably sleeved with a rotating tube 94, and the rotating tube 94 is rotatably connected to the upper end of the fixed tube 9. A clamping plate 95 is fixedly connected to the outer wall of the rotating tube 94. The clamping plate 95 is located in the arc-shaped through groove 96 opened on the outside of the storage tube 1. A rubber pressure sleeve 97 is bonded to the clamping plate 95, and a soft pressure block is provided on the rubber pressure sleeve 97.

[0018] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, a compression spring 98 is fitted on the upper side of the pressure rod 92. The upper end of the compression spring 98 abuts against the upper end cap of the pressure rod 92, and the lower end of the compression spring 98 abuts against the lower end of the rotating tube 94. The side of the pressure rod 92 is movably fitted with a connecting sleeve 99, which is fixed to the outer wall of the guide tube 5. The lower end of the pressure rod 92 is fixedly connected to a spline spring telescopic rod 910. The upper end of the inner rod of the spline spring telescopic rod 910 is fixedly sleeved with a pressure sleeve 911, and the top surface of the pressure sleeve 911 abuts against the bottom surface of the connecting sleeve 99. The lower end of the spline spring telescopic rod 910 is fixedly connected to a baffle 912. The spline spring telescopic rod 910 ensures that after the two wedge blocks 44 clamp the upper end of the side of the PIN needle, the downward movement of the guide tube 5 stably drives the PIN needle to move downward.

[0019] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, four reset pressing rods 71 ​​are fixedly connected to the inner wall of the outer sleeve 7. The reset pressing rods 71 ​​are on the upper side of the wedge-shaped push block 8, and the four reset pressing rods 71 ​​correspond one-to-one with the four guide protrusions 45 and are on the same vertical plane.

[0020] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, a vertical fixing groove 72 is provided on the outer side of the outer sleeve 7. A positioning bolt 73 is slidably and rotatably connected in the vertical fixing groove 72. One end of the positioning bolt 73 is located on the inner wall of the outer sleeve 7 below the pressure sleeve 911, which is used to limit the maximum downward movement of the pressure sleeve 911. By adjusting the height of the positioning bolt 73 in the vertical fixing groove 72, the maximum downward movement of the pressure sleeve 911 is limited, thereby making it easier for the user to control the depth of the PIN pins inserted into the circuit board according to the needs of the device.

[0021] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, the bottom of the outer sleeve 7 has an opening, and the central axis of the opening is coaxial with the central axis of the storage tube 1.

[0022] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10 As shown, a roller 47 is rotatably connected to the inclined surface of the wedge block 44, and the roller 47 reduces the friction between the wedge block 44 and the wedge push block 8.

[0023] The method of use and advantages of this invention: The working process of this PIN pin press-fitting equipment for circuit boards is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4, Figures 5 to 10 Figure 1 Figure 2 Figure 3 Figure 4 Figures 5 to 10 Figure 1 Figure 2 Figure 3 Figure 4 Figures 5 to 10 As shown; S1: Initial preparation stage: Place the PIN pins to be pressed into the storage tube 1. Under the action of gravity, the PIN pins move down along the inner wall of the storage tube 1 until the lowest PIN pin contacts the baffle 912 at the lower end of the spline spring telescopic rod 910. At this time, the PIN pins are in the initial positioning state to be pressed. Then, align the bottom opening of the outer sleeve 7 with the pin holes on the circuit board to complete the alignment of the equipment and the circuit board. S2: Pressing and initial clamping stage: Manually press down the pressing tube 2, the pressing tube 2 slides down along the outer wall of the storage tube 1, and simultaneously drives the two push rods 3 fixed on its outer wall to move down; the push rods 3 drive the lower fixed insertion frame 4 and the guide tube 5 at the opposite end of the insertion frame 4 to move down synchronously. When the guide tube 5 moves downward, the connecting sleeve 99 fixed on its outer wall drives the movable sleeved pressure rod 92 to move downward, so that the guide block 93 on the outer wall of the pressure rod 92 enters the upper inclined groove section of the guide groove 91 on the inner wall of the fixed tube 9; when the guide block 93 slides along the upper inclined groove, it deflects, which drives the rotating tube 94 splined on the side of the pressure rod 92 to rotate synchronously. The clamping plate 95 on the outer wall of the rotating tube 94 deflects with it in the arc-shaped through groove 96 of the storage tube 1. Finally, the rubber pressure sleeve 97 on the clamping plate 95 fits against the side of the adjacent PIN pin directly above the PIN pin to be pressed, realizing the initial clamping and fixing of the adjacent PIN pin. S3: Spacing Opening and Pin Clamping Stage: The guide tube 5 continues to move downward, driving the guide block 93 of the pressure rod 92 from the upper inclined groove section of the guide groove 91 into the upper vertical groove section and moving downward along the upper vertical groove; during this process, the pressure rod 92 drives the spline spring telescopic rod 910 and the baffle 912 to move downward synchronously, so that the pin to be pressed contacts the baffle 912, and a preset distance is opened between it and the adjacent pins clamped above, so as to avoid interference between adjacent pins during pressing. Simultaneously, the wedge block 44 inside the insertion frame 4 moves downward with the insertion frame 4, and its inclined surface contacts the wedge push block 8 on the inner wall of the outer sleeve 7; the wedge push block 8 generates a lateral pushing force on the wedge block 44, causing the wedge block 44 to slide along the insertion frame 4 towards the storage tube 1, and simultaneously driving the slider 42 to slide in the transverse groove 41 of the insertion frame 4, causing the fixed spring telescopic rod 43 to deflect and generate elastic support force; under the auxiliary pushing force of the fixed spring telescopic rod 43, the horizontal section of the inverted L-shaped arc end of the wedge block 44 abuts against the upper end face of the PIN needle to be pressed, and the soft pad 46 of the vertical section fits against the side of the PIN needle to be pressed, thus achieving stable clamping of the PIN needle to be pressed. S4: Enhanced clamping and press-fit insertion stage: The guide tube 5 continues to move downward, causing the guide block 93 of the pressure rod 92 to enter the lower inclined groove section from the upper vertical groove section of the guide groove 91, and then enter the lower vertical groove section; when the guide block 93 slides along the lower inclined groove, it further deflects, causing the pressure rod 92 and the rotating tube 94 to rotate again, so that the clamping plate 95 and the rubber pressure sleeve 97 further clamp the adjacent PIN pins, preventing them from shifting when the PIN pin to be pressed moves downward.

[0024] At the same time, the rotation of the pressure rod 92 causes the spline spring telescopic rod 910 and the lower baffle 912 to deflect synchronously, and the baffle 912 releases the obstruction of the lowest PIN pin to be pressed; at this time, the PIN pin to be pressed, which is held by the wedge block 44, continues to move down with the wedge block 44, and finally extends out from the bottom opening of the outer sleeve 7, and is accurately inserted into the pin hole of the circuit board, completing the PIN pin pressing operation. S5: Equipment Reset and Cycle Preparation Stage: After pressing is completed, the equipment is separated from the circuit board. The spring 98 on the side of the pressure rod 92 releases the reset force, pushing the pressure rod 92 upward to reset. When the pressure rod 92 drives the guide block 93 to gradually return from the lower vertical groove section and the lower inclined groove section of the guide groove 91 to the upper vertical groove section, the baffle 912 deflects in the opposite direction with the pressure rod 92, restoring the blocking posture of the PIN needle; When the guide block 93 continues to reset to the upper inclined groove section, the clamping plate 95 and the rubber pressure sleeve 97 deflect in opposite directions, releasing the clamping of the adjacent PIN needles. The remaining PIN needles in the storage tube 1 move down under the action of gravity and contact the upper side of the wedge block 44. As the pressure rod 92 continues to move upward, it drives the insertion frame 4 and the guide tube 5 to move upward. The guide protrusion 45 at the end of the wedge block 44 abuts against the reset extrusion rod 71 on the inner wall of the outer sleeve 7. The reset extrusion rod 71 pushes the guide protrusion 45 to make the wedge block 44 slide back and reset, thus releasing the obstruction to the PIN needle. Finally, the remaining PIN pins move down to contact the reset baffle 912, the device returns to its initial state, and the next PIN pin pressing operation can be performed.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PIN pin pressing device for circuit boards, comprising a storage tube (1) for storing PIN pins, a pressing tube (2) for applying pressure is slidably sleeved on the top of the outer wall of the storage tube (1), and two vertically parallel push rods (3) are fixedly connected to the outer wall of the pressing tube (2); the lower ends of the two push rods (3) are fixedly connected to the insertion frame (4), and the opposite ends of the insertion frame (4) are fixedly connected to the guide tube (5) for guiding the PIN pins to move downward, the inner wall of the guide tube (5) is connected to the insertion frame (4) and the central axis is coaxial with the storage tube (1) to ensure the coaxiality of the PIN pin delivery; Its features are, Two horizontal slots (41) are opened on both the front and rear sides of the interpenetrating frame (4). The slider (42) is slidably connected in the horizontal slot (41). The slider (42) is hinged to a fixed spring telescopic rod (43) to ensure clamping stability. The upper end of the fixed spring telescopic rod (43) is hinged to the push rod (3), which can assist the wedge block (44) in stably clamping the surface of the PIN needle. A wedge block (44) for holding the PIN pin is inserted inside the interpenetrating frame (4). One end of the wedge block (44) is an inverted L-shaped arc and a soft pad (46) for protecting the surface of the PIN pin is glued to this end. The other end is fixedly connected to guide protrusions (45) for guiding reset on both the front and rear sides. A fixing block (6) is fixedly connected to the outside of the storage tube (1), and an outer sleeve (7) is fixedly connected to the fixing block (6). The outer sleeve (7) is fitted onto the outside of the storage tube (1). A wedge-shaped push block (8) for pushing the wedge block (44) is fixedly connected to the inner wall of the outer sleeve (7). The wedge-shaped push block (8) and the wedge block (44) are on the same vertical plane to ensure that the wedge block (44) can accurately contact and receive force.

2. The PIN pin press-fitting device for circuit boards according to claim 1, characterized in that: The storage tube (1) is fixedly connected to the outer wall of the fixed tube (9). The inner wall of the fixed tube (9) is provided with a guide groove (91). The guide groove (91) consists of an upper inclined groove, an upper vertical groove, a lower inclined groove, and a lower vertical groove from top to bottom. The fixed tube (9) is vertically slidably connected to the pressure rod (92). The outer wall of the pressure rod (92) is fixedly connected to a guide block (93) that cooperates with the guide groove (91). The guide block (93) is slidably located in the guide groove (91) and can drive the pressure rod (92) to move synchronously. The side spline of the pressure rod (92) is slidably connected to a rotating tube (94), which is rotatably connected to the upper end of the fixed tube (9), and the outer wall of the rotating tube (94) is fixedly connected to a clamping plate (95) for holding adjacent PIN pins. The clamp (95) is placed in the arc-shaped through groove (96) opened on the outside of the storage tube (1), and a rubber sleeve (97) for increasing the clamping friction is bonded to the clamp (95).

3. The PIN pin press-fitting device for circuit boards according to claim 2, characterized in that: A spring (98) for resetting is sleeved on the upper side of the pressure rod (92). The upper end of the spring (98) abuts against the upper end cover of the pressure rod (92), and the lower end abuts against the lower end of the rotating tube (94). It can drive the pressure rod (92) to move upward and reset after the equipment is used. The side of the pressure rod (92) is movably sleeved with a connecting sleeve (99) for connecting the guide tube (5). The connecting sleeve (99) is fixed to the outer wall of the guide tube (5), so that the guide tube (5) can move down and drive the pressure rod (92) synchronously. The lower end of the pressure rod (92) is fixedly connected to a spline spring telescopic rod (910) for stabilizing the downward movement of the PIN needle. The spline spring telescopic rod (910) can ensure that the PIN needle follows stably when the guide tube (5) moves downward after the wedge block (44) clamps the PIN needle. The upper end of the inner rod of the spline spring telescopic rod (910) is fixedly sleeved with the pressure sleeve (911), and the top surface of the pressure sleeve (911) abuts against the bottom surface of the connecting sleeve (99); the lower end of the spline spring telescopic rod (910) is fixedly connected with a baffle (912) for initial support of the PIN pin, which can release the obstruction when the pressure rod (92) rotates, allowing the PIN pin to move down.

4. The PIN pin press-fitting device for circuit boards according to claim 1, characterized in that: The inner wall of the outer sleeve (7) is fixedly connected to four reset squeezing rods (71) for resetting the wedge block. The reset squeezing rods (71) are located on the upper side of the wedge push block (8) and correspond one-to-one with the four guide protrusions (45) and are on the same vertical plane. They can abut against the guide protrusions (45) when the equipment is reset, thereby driving the wedge block (44) to return to its original position and release the clamp.

5. The PIN pin press-fitting device for circuit boards according to claim 3, characterized in that: A vertical fixing groove (72) is opened on the outer side of the outer sleeve (7), and a positioning bolt (73) for controlling the depth of the insertion pin is slidably and rotatably connected in the vertical fixing groove (72). The positioning bolt (73) is located at one end of the inner wall of the outer sleeve (7) below the pressure sleeve (911) to limit the maximum downward movement of the pressure sleeve (911) and thereby adjust the depth of the PIN pin insertion circuit board.

6. The PIN pin press-fitting device for circuit boards according to claim 1, characterized in that: The bottom of the outer sleeve (7) has an opening for the PIN pin to pass through. The central axis of the opening is coaxial with the storage tube (1) to ensure that the PIN pin can be accurately inserted into the pin hole of the circuit board.

7. The PIN pin press-fitting device for circuit boards according to claim 1, characterized in that: A roller (47) for reducing friction is rotatably connected to the inclined surface of the wedge block (44), which can reduce the sliding resistance when the wedge block (44) contacts the wedge push block (8).

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