PCB fixing jig

Abstract

The utility model provides a PCB board fixing tool, comprising a base plate and a mounting seat, the mounting seat is provided with a placing groove, the placing groove is used for placing a PCB board, two opposite inner side walls of the placing groove are respectively provided with a plurality of mounting holes and a plurality of first support blocks, the mounting holes are communicated with the placing groove, each first support block is respectively arranged right below the corresponding mounting hole, and the first support blocks are arranged in the placing groove. The first supporting block is used for supporting the PCB; the mounting hole is internally provided with a driving piece, the output end of the driving piece is arranged towards the center of the placement groove, the output end is fixedly connected with a stop block, and the stop block is driven by the driving piece to do linear reciprocating motion in the direction perpendicular to the inner side wall of the placement groove, so that the stop block can movably stretch out and draw back in the mounting hole to fix or release the PCB located in the placement groove. According to the utility model, the driving piece is arranged to drive the baffle block to do linear reciprocating motion along the direction vertical to the inner side wall of the placing groove, so that the baffle block can quickly fix and release the PCB in the placing groove, and the working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of PCB board fixing technology, and in particular to a PCB board fixing fixture. Background Technology

[0002] In modern PCB manufacturing, printing QR codes on PCBs is a crucial step. It enables functions such as product identification, production information traceability, and quality control, which is of great significance for improving PCB production management efficiency and product quality. However, the fixation of the PCB during QR code printing directly determines the printing accuracy and quality of the QR codes.

[0003] Currently, most PCB boards are fixed on semi-automatic laser marking machines using bolt clamping. The bolt clamping structure mainly includes a screw, a nut that matches the screw, a chuck at one end of the screw, and a handle at the other end of the screw. The operator rotates the handle to drive the screw to rotate, and the threaded connection between the nut and the screw converts the rotational motion of the screw into linear motion, which pushes the chuck to apply clamping force to the PCB board, thereby achieving stable clamping of the PCB board.

[0004] However, in actual operation, each clamping or disassembly of the PCB board requires manual rotation of the handle multiple times, which is cumbersome, time-consuming, and has low production efficiency. Furthermore, because the force is applied by manually operating the handle, it is difficult to precisely control the clamping force of the chuck on the PCB board, which can easily lead to displacement of the PCB board or cracking of the circuits on the PCB board, seriously affecting the printing quality of the QR codes on the PCB. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a PCB board fixing fixture, which aims to solve the technical problems of the existing bolt clamping method for fixing PCB boards. Each clamping or disassembling of the PCB board requires manual rotation of the handle multiple times, which is cumbersome, time-consuming and has low production efficiency. In addition, the clamping force of the chuck on the PCB board is difficult to control precisely, which can easily cause the PCB to shift or the circuit on the PCB board to be cracked, which seriously affects the printing quality of QR codes on the PCB.

[0006] The purpose of this utility model is to provide a PCB board fixing fixture, including a base plate and a mounting seat fixed on the base plate. The mounting seat is provided with a placement groove for placing a PCB board. The two opposite inner sidewalls of the placement groove are respectively provided with a plurality of mounting holes and a plurality of first support blocks. The mounting holes are connected to the placement groove. Each first support block is located directly below the corresponding mounting hole. The first support block is used to support the PCB board.

[0007] A driving component is installed in the mounting hole. The output end of the driving component is oriented toward the center of the placement slot, and a stop block is fixedly connected to the output end. The driving component drives the stop block to reciprocate linearly in a direction perpendicular to the inner sidewall of the placement slot, so that the stop block can be movably extended and retracted in the mounting hole to fix or release the PCB board located in the placement slot.

[0008] Compared with existing technologies, the beneficial effects of this PCB board fixing fixture are as follows: by setting a driving component to drive the stop block to make linear reciprocating motion in a direction perpendicular to the inner sidewall of the placement groove, the stop block can quickly fix and release the PCB board in the placement groove. Compared with the fixing method of manually tightening bolts, it greatly shortens the time for fixing and disassembling the PCB board, improves work efficiency, and the synergistic effect of the driving component and the stop block can make the PCB board receive a uniform and stable clamping force in the placement groove, avoiding the phenomenon of uneven clamping force and ensuring the printing quality of QR codes on the PCB board in the future.

[0009] In addition, the PCB board fixing fixture described above according to this utility model may also have the following additional technical features:

[0010] Furthermore, the drive component includes a housing, one end of which is provided with a receiving cavity and an air intake regulating valve. The air intake regulating valve is connected to the bottom of the receiving cavity through an air intake pipe. A piston is provided inside the receiving cavity, and the air outlet of the air intake pipe is directly opposite the middle of the end face of the piston.

[0011] A guide sleeve is fixed at the other end of the housing. The guide sleeve coincides with the center line of the receiving cavity. A push rod is slidably inserted inside the guide sleeve. One end of the push rod is connected to the piston, and the other end is connected to the stop block.

[0012] Furthermore, the piston includes a connecting block portion, a mounting cylinder portion integrally connected to the connecting block portion, and a connecting rod portion disposed within the mounting cylinder portion. The connecting block portion is located within the receiving cavity and its end face is disposed adjacent to the bottom of the receiving cavity. One end of the mounting cylinder portion away from the connecting block portion is movably sleeved on the outer peripheral surface of the guide sleeve. One end of the connecting rod portion is fixedly connected to the bottom of the mounting cylinder portion, and the other end of the connecting rod portion is fixedly connected to the push rod.

[0013] Furthermore, the driving component also includes a spring, which is sleeved on the connecting rod portion, with one end of the spring fixedly connected to the rod body of the connecting rod portion and the other end fixedly connected to the end face of the guide sleeve.

[0014] Furthermore, the push rod has an external thread structure on one end away from the piston, and the stop block has an internal thread hole that matches the external thread structure, so as to realize the threaded connection between the push rod and the stop block.

[0015] Furthermore, a fixing block is provided inside the receiving cavity. The fixing block is arranged radially along the receiving cavity, and one end of the fixing block is connected to the side wall of the receiving cavity. The other end of the fixing block is arranged near the center of the end face of the piston, and a buffer pad is provided on the side of the fixing block facing the piston.

[0016] Furthermore, a plurality of second support blocks are provided on the other two opposite inner sidewalls of the placement groove, and the upper surface of the second support block is flush with the upper surface of the first support block.

[0017] Furthermore, the second support block is a semi-circular plate structure, and the second support block is fixedly connected to the inner wall of the placement groove through its rectangular side.

[0018] Furthermore, the first support block is a rectangular plate structure, and the first support block is fixedly connected to the inner wall of the placement groove through one side of its width direction.

[0019] Furthermore, the top surface of the mounting base is provided with at least two retrieval slots, which are connected to the placement slots, and the bottom of the retrieval slots is lower than the upper surface of the first support block. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the PCB board fixing fixture of this utility model;

[0021] Figure 2 for Figure 1 Cross-sectional view of section AA;

[0022] Figure 3 for Figure 1 Cross-sectional view of section BB;

[0023] Figure 4 for Figure 2 Enlarged view of the structure at point C;

[0024] Figure 5 for Figure 4 Enlarged view of the structure at point D;

[0025] Figure 6 This is a schematic diagram illustrating the working principle of the PCB board fixing fixture of this utility model.

[0026] The above-mentioned figures include the following reference numerals: 11-base plate; 12-mounting base; 13-first support block; 14-second support block; 15-stop block; 101-placement groove; 102-plate taking groove; 20-driving component; 21-housing shell; 22-piston; 221-connecting block part; 222-mounting cylinder part; 223-connecting rod part; 23-guide sleeve; 24-push rod; 25-spring; 26-magnet; 27-sealing gasket; 28-fixing block; 29-buffer pad; 31-intake regulating valve; 32-intake pipeline; 33-connecting pipeline; 34-throttle valve; 35-solenoid valve.

[0027] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figures 1 to 6The diagram shows the PCB board fixing fixture of this utility model, including a base plate 11 and a mounting base 12 fixed on the base plate 11. The base plate 11 has multiple connecting through holes for mounting bolts to fix the entire PCB board fixing fixture in a preset position on a semi-automatic laser marking machine. The mounting base 12 has a placement groove 101 for placing the PCB board. Multiple mounting holes and multiple first support blocks 13 are respectively provided on two opposite inner sidewalls of the placement groove 101. The mounting holes communicate with the placement groove 101, and each first support block 13 is located directly below the corresponding mounting hole, supporting the PCB board. Furthermore, multiple second support blocks 14 are respectively provided on the other two opposite inner sidewalls of the placement groove 101. The upper surface of the second support blocks 14 is flush with the upper surface of the first support blocks 13, so that the first support blocks 13 and the second support blocks 14 together form a complete support plane, enhancing the stability of the PCB board placement. As a specific example, in this embodiment, two first support blocks 13 are respectively spaced apart on the two opposite inner sidewalls of the placement groove 101, and two second support blocks 14 are respectively spaced apart on the other two opposite inner sidewalls.

[0032] Furthermore, the first support block 13 is a rectangular plate structure, and the first support block 13 is fixedly connected to the inner wall of the placement groove 101 through one side of its width direction. The second support block 14 is a semi-circular plate structure, and the second support block 14 is fixedly connected to the inner wall of the placement groove 101 through its rectangular side. The semi-circular plate structure design can reduce the risk of damage to the edge of the PCB board while ensuring the support effect, which is conducive to improving product quality.

[0033] Furthermore, at least two pick-up slots 102 are provided on the top surface of the mounting base 12. The pick-up slots 102 are connected to the placement slots 101. The bottom of the pick-up slots 102 is lower than the upper surface of the first support block 13, so that the operator can insert his / her fingers into the pick-up slots 102 to take the PCB board out of the placement slots 101, thereby improving the convenience of PCB board pick-up and placement operations.

[0034] As an example, a drive unit 20 is installed in the mounting hole. The output end of the drive unit 20 is set towards the center of the placement slot 101, and a stop block 15 is fixedly connected to the output end. The drive unit 20 drives the stop block 15 to perform linear reciprocating motion in a direction perpendicular to the inner sidewall of the placement slot 101, so that the stop block 15 can be movably extended and retracted in the mounting hole to fix or release the PCB board located in the placement slot 101.

[0035] Furthermore, the drive component 20 includes a housing 21. One end of the housing 21 is provided with a receiving cavity and an air intake regulating valve 31. The air intake regulating valve 31 is connected to the bottom of the receiving cavity through an air intake pipe 32. The air intake regulating valve 31 is used to control the gas pressure entering the receiving cavity. A piston 22 is provided in the receiving cavity. The outlet of the air intake pipe 32 is directly opposite the middle of the end face of the piston 22. The other end of the housing 21 is fixedly provided with a guide sleeve 23. The guide sleeve 23 coincides with the center line of the receiving cavity. A push rod 24 is slidably passed through the guide sleeve 23. One end of the push rod 24 is connected to the piston 22, and the other end is connected to the stop block 15. In this way, when compressed air enters the receiving cavity through the air intake regulating valve 31 and the air intake pipe 32, the piston 22 can move under the action of gas pressure and drive the push rod 24 to move axially along the guide sleeve 23, so that the stop block 15 connected to the push rod 24 moves away from the mounting hole to fix the edge of the PCB board.

[0036] Furthermore, the piston 22 includes a connecting block portion 221, a mounting cylinder portion 222 integrally connected to the connecting block portion 221, and a connecting rod portion 223 disposed within the mounting cylinder portion 222. The connecting block portion 221 is located within the receiving cavity, with its end face adjacent to the bottom of the receiving cavity, to withstand gas pressure, allowing the piston 22 to be pushed and moved under the action of gas pressure. One end of the mounting cylinder portion 222 away from the connecting block portion 221 is movably fitted onto the outer peripheral surface of the guide sleeve 23, providing guidance for the movement of the piston 22 and ensuring the stability of the piston 22's movement within the receiving cavity. One end of the connecting rod portion 223 is fixedly connected to the bottom of the mounting cylinder portion 222, and the other end of the connecting rod portion 223 is fixedly connected to the push rod 24, ensuring that the movement of the piston 22 can drive the push rod 24 and the stop block 15 to move synchronously.

[0037] Furthermore, the drive component 20 also includes a spring 25, which is sleeved on the connecting rod portion 223. One end of the spring 25 is fixedly connected to the rod body of the connecting rod portion 223, and the other end is fixedly connected to the end face of the guide sleeve 23. This effectively reduces the impact force during the movement of the piston 22, lowers the risk of damage to the internal components of the drive component 20 due to impact, and extends the service life of the drive component 20. At the same time, the reset function of the spring 25 allows the stop block 15 to retract quickly and accurately, facilitating the release operation of the PCB board and improving the ease of use and reliability of the PCB board fixing fixture. In practical applications, when the gas pushes the piston 22 to extend the stop block 15 and fix the PCB board, the spring 25 is in a compressed state. When the gas pressure changes, the spring 25 releases its elastic potential energy, pushing the piston 22 and the stop block 15 to retract.

[0038] Furthermore, the drive unit 20 also includes a magnet 26, which is fixed to the inside of the housing 21 by adhesive. The magnet 26 is used to cooperate with the magnetic sensor to detect the position of the piston 22, thereby providing feedback on the movement status of the push rod 24 and the stop block 15, and ensuring the normal operation of the entire device.

[0039] Furthermore, the drive component 20 also includes a sealing gasket 27. A limiting ring is provided at the port of the receiving cavity, and a piston 22 is movably inserted through the limiting ring. The sealing gasket 27 is installed at the connection between the limiting ring and the port of the receiving cavity by an interference fit. It should be understood that the sealing gasket 27 can be installed at any location in the internal structure of the drive component 20 where there are connection gaps that result in poor sealing, in order to prevent gas leakage and maintain stable internal gas pressure.

[0040] Furthermore, the push rod 24 has an external thread structure on the end of the rod away from the piston 22, and the stop block 15 has an internal thread hole that matches the external thread structure, so as to realize the threaded connection between the push rod 24 and the stop block 15, which facilitates the replacement and maintenance of the stop block 15 and reduces the maintenance difficulty and cost of the PCB board fixing fixture. At the same time, the installation position of the stop block 15 can be precisely adjusted through the threaded connection to adapt to the fixing requirements of PCB boards of different sizes, thereby enhancing the applicability of the PCB board fixing fixture.

[0041] Furthermore, a fixing block 28 is provided inside the receiving cavity. The fixing block 28 is arranged radially along the receiving cavity, and one end of the fixing block 28 is connected to the side wall of the receiving cavity. The other end of the fixing block 28 is located near the center of the end face of the piston 22. A buffer pad 29 is provided on the side of the fixing block 28 facing the piston 22. When the piston 22 moves to the limit position, the fixing block 28 and the buffer pad 29 can reduce the impact force of the piston 22 and protect the internal structure of the drive component 20.

[0042] In practical application, the working principle of the PCB board fixing fixture of this utility model is as follows: First, the fixture is fixed to the semi-automatic laser marking machine by bolts threaded through the connecting through holes on the base plate and threaded to the preset position on the machine. Then, as... Figure 6 As shown, the intake regulating valve 31 of the drive unit 20 on the mounting base 12 is connected to an external air tank through a connecting pipe 33. The air tank is used to provide compressed air, and a throttle valve 34 and a solenoid valve 35 are provided on the connecting pipe 33. When the drive unit 20 is not operated, the PCB board is placed in the placement slot 101. The first support block 13 on the side wall of the placement slot 101 and the second support blocks 14 on the other two opposite side walls provide bottom support for the PCB board to ensure that the PCB board is placed stably in the placement slot 101. At this time, a gap is left between the circumferential edge of the PCB board and the stop block 15.

[0043] Next, the solenoid valve 35 is opened, and the compressed air in the air tank passes through the connecting pipe 33, and after the flow rate is regulated by the throttle valve 34, it enters the receiving cavity of the drive component 20 through the intake regulating valve 31 and the intake pipe 32. The compressed air pushes the piston 22. Since the piston 22 is connected to the push rod 24, the push rod 24 drives the stop block 15 to move linearly towards the center of the placement groove 101 in a direction perpendicular to the inner wall of the placement groove 101 until the stop block 15 presses against the side of the PCB board. The multiple stop blocks 15 work together to firmly fix the PCB board in the placement groove 101. During this process, the setting of the piston 22 can ensure the stability and sealing of the movement, and the guide sleeve 23 guides the push rod 24 to make the movement trajectory of the stop block 15 more precise. The spring 25 is sleeved on the connecting rod 223 and plays a buffering role when the stop block 15 presses against the PCB board to avoid hard damage to the PCB board. After the PCB board is fixed, subsequent processing and testing can be performed. The stable fixation of the PCB board fixture ensures the accuracy and consistency of the operations. Once the QR code is printed on the PCB board, the solenoid valve 35 is closed, cutting off the compressed air supply. Under the return force of the spring 25, the piston 22 drives the push rod 24 and the stop block 15 to move in opposite directions. The stop block 15 moves to its initial position, releasing the PCB board from its fixation. At this point, the PCB board can be removed from the placement slot 101 via the pick-up slot 102, facilitating the fixation of the next PCB board.

[0044] In summary, the beneficial effects of the PCB board fixing fixture of this utility model are as follows: by setting the driving component to drive the stop block to make linear reciprocating motion in a direction perpendicular to the inner sidewall of the placement groove, the stop block can quickly fix and release the PCB board in the placement groove. Compared with the fixing method of manually tightening bolts, it greatly shortens the time for fixing and disassembling the PCB board, improves work efficiency, and the synergistic effect of the driving component and the stop block can make the PCB board receive a uniform and stable clamping force in the placement groove, avoiding the phenomenon of uneven clamping force and ensuring the printing quality of QR codes on the PCB board in the future.

[0045] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. A PCB board fixing fixture, characterized in that, The device includes a base plate and a mounting base fixed on the base plate. The mounting base has a placement groove for placing a PCB board. The two opposite inner sidewalls of the placement groove are respectively provided with a plurality of mounting holes and a plurality of first support blocks. The mounting holes communicate with the placement groove. Each first support block is located directly below the corresponding mounting hole and is used to support the PCB board. A driving component is installed in the mounting hole. The output end of the driving component is oriented toward the center of the placement slot, and a stop block is fixedly connected to the output end. The driving component drives the stop block to reciprocate linearly in a direction perpendicular to the inner sidewall of the placement slot, so that the stop block can be movably extended and retracted in the mounting hole to fix or release the PCB board located in the placement slot.

2. The PCB board fixing fixture according to claim 1, characterized in that, The drive unit includes a housing, one end of which is provided with a receiving cavity and an air intake regulating valve. The air intake regulating valve is connected to the bottom of the receiving cavity through an air intake pipe. A piston is provided inside the receiving cavity, and the air outlet of the air intake pipe is directly opposite the middle of the end face of the piston. A guide sleeve is fixed at the other end of the housing. The guide sleeve coincides with the center line of the receiving cavity. A push rod is slidably inserted inside the guide sleeve. One end of the push rod is connected to the piston, and the other end is connected to the stop block.

3. The PCB board fixing fixture according to claim 2, characterized in that, The piston includes a connecting block portion, a mounting cylinder portion integrally connected to the connecting block portion, and a connecting rod portion disposed within the mounting cylinder portion. The connecting block portion is located within the receiving cavity and its end face is disposed adjacent to the bottom of the receiving cavity. One end of the mounting cylinder portion away from the connecting block portion is movably sleeved on the outer peripheral surface of the guide sleeve. One end of the connecting rod portion is fixedly connected to the bottom of the mounting cylinder portion, and the other end of the connecting rod portion is fixedly connected to the push rod.

4. The PCB board fixing fixture according to claim 3, characterized in that, The driving component also includes a spring, which is sleeved on the connecting rod portion, with one end of the spring fixedly connected to the rod body of the connecting rod portion and the other end fixedly connected to the end face of the guide sleeve.

5. The PCB board fixing fixture according to claim 2, characterized in that, The push rod has an external thread structure on one end away from the piston, and the stop block has an internal thread hole that matches the external thread structure, so as to realize the threaded connection between the push rod and the stop block.

6. The PCB board fixing fixture according to claim 2, characterized in that, The cavity is further provided with a fixing block, which is arranged radially along the cavity. One end of the fixing block is connected to the side wall of the cavity, and the other end of the fixing block is located near the center of the end face of the piston. A buffer pad is provided on the side of the fixing block facing the piston.

7. The PCB board fixing fixture according to claim 1, characterized in that, The other two opposite inner sidewalls of the placement slot are respectively provided with a plurality of second support blocks, the upper surface of the second support block being flush with the upper surface of the first support block.

8. The PCB board fixing fixture according to claim 7, characterized in that, The second support block is a semi-circular plate structure, and the second support block is fixedly connected to the inner wall of the placement groove through its rectangular side.

9. The PCB board fixing fixture according to claim 1, characterized in that, The first support block is a rectangular plate structure, and the first support block is fixedly connected to the inner wall of the placement groove through one side of its width direction.

10. The PCB board fixing fixture according to claim 1, characterized in that, The top surface of the mounting base is also provided with at least two retrieval slots, which are connected to the placement slots, and the bottom of the retrieval slots is lower than the upper surface of the first support block.

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