A type of PCB positioning jig

Abstract

This utility model discloses a PCB positioning fixture, including a substrate with a front and a back side. A board material is placed on the front side, and multiple fixing holes are formed on the surface of the substrate. Multiple pneumatic actuators are disposed on the back side corresponding to the fixing holes. Each pneumatic actuator is movably connected to a pressing member, a portion of which extends from the fixing hole to the front side. A switch is connected to each pneumatic actuator to control the movement of the pressing member within the fixing holes, thereby pressing / releasing the board material. The technical solution of this utility model aims to improve positioning accuracy, optimize clamping effect, and enhance operational efficiency.

Description

Technical Field

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

[0002] In the manufacturing process of printed circuit boards (PCBs), positioning fixtures are key tooling equipment that ensures the precise positioning of the boards during drilling, milling, surface mount technology (SMT), or testing. As electronic products become increasingly high-density and miniaturized, the precision requirements for PCB processing are rising. Traditional manual positioning or simple clamps can no longer meet the efficiency, consistency, and reliability demands of modern processes. Therefore, specialized fixtures with high-precision positioning and stable clamping functions have become essential equipment on production lines. Most existing positioning fixtures suffer from the following drawbacks: low positioning accuracy, easily leading to PCB misalignment due to visual errors or improper operation, affecting processing quality; uneven clamping force, with inconsistent pressure distribution in mechanical fixtures, potentially causing localized deformation or damage to the PCB; and low efficiency, with cumbersome manual locking / unlocking procedures that cannot adapt to the cycle time requirements of automated production lines. Utility Model Content

[0003] The main purpose of this utility model is to provide a PCB positioning fixture, which aims to improve positioning accuracy, optimize clamping effect, and enhance operational efficiency.

[0004] To achieve the above objectives, this utility model proposes a PCB positioning fixture, comprising:

[0005] A substrate having a front and a back, with a plate placed on the front and multiple fixing holes on the surface of the substrate. Multiple pneumatic actuators are provided on the back corresponding to the fixing holes. Each pneumatic actuator is movably connected to a pressing member, a portion of which extends from the fixing hole to the front. Each pneumatic actuator is connected to a switch to control the pneumatic actuator to drive the pressing member to move within the fixing hole, thereby pressing / releasing the plate.

[0006] In one possible implementation, a plurality of the pneumatic actuators are connected to a flow divider valve, which is connected to the switching element.

[0007] In one possible implementation, the substrate has an operating port corresponding to the switch element, the switch element is connected to an operating handle, the operating handle is located on the front side and passes through the operating port to connect to the switch element.

[0008] In one possible implementation, a pressure gauge is also provided on the front side of the substrate, and the pressure gauge is connected to the switch and the diverter valve.

[0009] In one possible implementation, the front side of the substrate is provided with a plurality of positioning posts, and the plate is provided with positioning holes corresponding to the positioning posts.

[0010] In one possible implementation, the front side of the substrate is further provided with limit blocks corresponding to the corners of the plate.

[0011] This utility model's technical solution significantly improves the precision, efficiency, and safety of PCB processing by employing a multi-level collaborative positioning and intelligent pneumatic clamping system. The positioning posts on the front of the substrate cooperate with the PCB positioning holes to achieve rapid coarse positioning, while corner limit blocks further prevent displacement. Multiple pneumatic actuators on the back are centrally supplied with air via a diversion valve, and all pressing components are synchronously clamped by a single button control on the front operating handle, with pressure values ​​monitored in real time via a pressure gauge. The linkage design between the operating port and the switch components makes human-machine interaction more convenient, making it particularly suitable for high-precision PCB manufacturing scenarios. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0013] Figure 1 This is an exploded view of an embodiment of the PCB positioning fixture of this utility model;

[0014] Figure 2 This is a front structural diagram of an embodiment of the PCB positioning fixture of this utility model;

[0015] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0016] Figure 4 This is a schematic diagram of the back structure of an embodiment of the PCB positioning fixture of this utility model.

[0017] Explanation of icon numbers:

[0018] 1. Base plate; 11. Fixing hole; 12. Positioning post; 2. Plate; 21. Positioning hole; 3. Pneumatic actuator; 31. Pressing part; 32. Diverter valve; 4. Switch; 41. Operating handle; 5. Pressure gauge; 6. Limit block.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] Reference Figures 1 to 4 This utility model proposes a PCB positioning fixture, including a substrate 1, which has a front and a back. A plate 2 is placed on the front. Multiple fixing holes 11 are opened on the surface of the substrate 1. Multiple pneumatic actuators 3 are arranged on the back corresponding to the fixing holes 11. A pressing member 31 is movably connected to the pneumatic actuator 3. A part of the pressing member 31 extends from the fixing hole 11 to the front. A switch 4 is connected to the pneumatic actuator 3 to control the pneumatic actuator 3 to drive the pressing member 31 to move in the fixing hole 11 to press / release the plate 2.

[0022] Understandably, substrate 1 is the main body of the fixture, with the front side for placing the PCB board 2 and the back side for arranging the drive components. Multiple holes are formed on the surface of substrate 1, extending through both the front and back sides. Pneumatic actuators 3 are mounted on the back side of substrate 1, with each fixing hole 11 corresponding to one pneumatic actuator. The pressing member 31 is a movable component connected to the pneumatic actuator; a portion extends through the fixing hole 11 to the front side for direct contact with the PCB board 2. Holes can be formed in the board 2, allowing the pressing member 31 to enter the hole and contact the hole wall, or the pressing member 31 can directly contact the edge of the board 2. A switching member 4 is used to control the on / off state of the pneumatic actuator, such as a button, switch, or solenoid valve.

[0023] The pneumatic actuator 3 is an actuator that uses air pressure to open, close, or regulate a valve. It is also called a pneumatic actuator mechanism or pneumatic device, but is commonly referred to as a pneumatic head. The actuator and regulating mechanism of the pneumatic actuator 3 are a unified whole. Its actuator can be diaphragm type, piston type, fork type, or rack and pinion type. In this example, the pneumatic actuator 3 is a piston type structure, which can drive the pressing member 31 to move back and forth in a straight line.

[0024] First, place the PCB board 2 on the front of the substrate 1 at the location to be processed. Activate the pneumatic actuator 3 via the switch 4, pushing the pressing member 31 to one side to press against the PCB board 2, securing it and preventing displacement during processing. Release the pressure by operating the switch 4 again; the pneumatic actuator will then move the pressing member 31 to the other side, releasing it from pressure on the board 2 and allowing it to be freely removed. The pneumatic drive provides fast response and uniform force, suitable for rapid, repetitive operations; multiple pressing points distribute pressure, preventing PCB deformation or localized damage.

[0025] Reference Figure 4 In one embodiment of this utility model, multiple pneumatic actuators 3 are connected to a diversion valve 32, and the diversion valve 32 is connected to a switch 4.

[0026] Understandably, the diverter valve 32 is a pneumatic control element used to distribute a single air source to multiple pneumatic actuators 3 on demand. The multiple pneumatic actuators 3 are connected to the diverter valve 32 via pipelines, and the diverter valve 32 is then connected to the switch 4, which acts as the master control to control the on / off state and flow direction of compressed air.

[0027] When the switch 4 is operated, compressed air is synchronously distributed to all pneumatic actuators 3 through the diversion valve 32, driving all pressing parts 31 to act simultaneously, achieving pressing or releasing, ensuring that the PCB board 2 is subjected to uniform force, and avoiding tilting or deformation caused by single-point pressure. The diversion valve 32 can adjust the air pressure of each branch to ensure that the downward pressure of each pressing part 31 is consistent.

[0028] Efficiency is improved by controlling multiple actuators with a single switch; the diversion valve 32 avoids delay in the action of each pressing component 31, ensuring that the plate 2 is fixed synchronously; if more pressing points are needed, simply add an output branch to the diversion valve 32.

[0029] Reference Figures 1 to 2 In one embodiment of the present invention, the substrate 1 has an operation port corresponding to the switch 4, and the switch 4 is connected to an operation handle 41. The operation handle 41 is located on the front and passes through the operation port to connect with the switch 4.

[0030] Understandably, the operating port is a dedicated hole or notch opened on the substrate 1, and its position corresponds to the switch 4 on the back. The operating handle 41 is a mechanical component connected to the switch 4, such as a handle, lever, or button, for manually triggering the switch 4. The operating handle 41 is located on the front side of the substrate 1, on the side easily accessible to the operator. The operating handle 41 passes through the operating port and extends to the back side to be directly connected to the switch 4.

[0031] Although the switch 4 is mounted on the back, it is brought to the front via the operating handle 41, so that the operator can control the clamping / releasing without having to go around to the back of the fixture.

[0032] Reference Figures 1 to 4 In one embodiment of this utility model, a pressure gauge 5 is also provided on the front side of the substrate 1, and the pressure gauge 5 is connected to the switch 4 and the diversion valve 32.

[0033] Understandably, the pressure gauge 5 is mounted on the front of the substrate 1, in the operator's field of vision, to display the current compressed air pressure value in the air circuit in real time. The pressure gauge 5 is connected to the pneumatic circuit between the switch 4 and the diverter valve 32 via a pipeline or air circuit interface to monitor the main air circuit pressure. This enables real-time pressure monitoring, directly displaying the working pressure of the pneumatic actuator 3, ensuring that the downward pressure of the pressing component 31 meets the process requirements. For example, too low a pressure may cause the PCB to not be pressed tightly, while too high a pressure may damage the board 2. If there is an abnormal air pressure, such as an air leak causing a pressure drop, the operator can immediately detect it through the pressure gauge 5 and stop the machine for repair.

[0034] Reference Figure 1 In one embodiment of this utility model, a plurality of positioning posts 12 are provided on the front side of the substrate 1, and positioning holes 21 are provided on the plate 2 corresponding to the positioning posts 12.

[0035] Understandably, the positioning posts 12 are rigid cylinders fixed to the front side of the substrate 1, with a height slightly higher than the PCB thickness. Multiple posts are provided to provide a coarse positioning reference for the PCB and restrict the planar movement of the board 2. The positioning holes 21 are holes pre-drilled at the edge or specific location of the PCB board 2, and their positions and diameters are precisely matched with the positioning posts 12.

[0036] The operator first aligns the positioning hole 21 of the PCB with the positioning post 12 on the substrate 1, and lowers it naturally so that the positioning post 12 passes through the positioning hole 21. At this time, the PCB is restricted to the horizontal plane and cannot be moved or rotated, but it is not yet pressed. After triggering the pneumatic actuator 3, the pressing member 31 moves in the fixing hole 11 and presses the PCB firmly against the front side of the substrate 1, completing the final fixation.

[0037] Reference Figures 1 to 3 In one embodiment of this utility model, a limiting block 6 is also provided on the front side of the substrate 1 corresponding to the corner of the plate 2.

[0038] Understandably, the limiting block 6 is a rigid stop fixed at the front corner of the substrate 1. It is made of hard, wear-resistant plastic and is L-shaped to fit the right-angled corner of the substrate 2. Its function is to block the corner of the PCB and, together with the positioning post 12 and the pressing member 31, achieve a relatively stable positioning operation. The positioning post 12 restricts the main degrees of freedom of the PCB through the positioning hole 21, while the limiting block 6 acts as an auxiliary constraint to further resist unexpected lateral forces.

[0039] This utility model's technical solution significantly improves the precision, efficiency, and safety of PCB processing by employing a multi-level collaborative positioning and intelligent pneumatic clamping system. The positioning posts 12 on the front of the substrate 1 cooperate with the PCB positioning holes 21 to achieve rapid coarse positioning, while the corner limiting blocks 6 further prevent displacement. The multiple pneumatic actuators 3 on the back are centrally supplied with air via a diversion valve 32, and all pressing parts 31 are synchronously clamped by a single button controlled by the front operating handle 41. The pressure value is monitored in real time by a pressure gauge 5. The linkage design between the operating port and the switch 4 makes human-machine interaction more convenient, especially suitable for high-precision PCB manufacturing scenarios.

[0040] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A PCB positioning fixture, characterized in that, include: A substrate (1) has a front side and a back side. A plate (2) is placed on the front side. A plurality of fixing holes (11) are opened on the surface of the substrate (1). A plurality of pneumatic actuators (3) are provided on the back side corresponding to the fixing holes (11). A pressing member (31) is movably connected to the pneumatic actuator (3). A part of the pressing member (31) extends from the fixing hole (11) to the front side. A switch member (4) is connected to the pneumatic actuator (3) to control the pneumatic actuator (3) to drive the pressing member (31) to move in the fixing hole (11) to press / release the plate (2).

2. The PCB positioning fixture according to claim 1, characterized in that, The pneumatic actuators (3) are connected to a diversion valve (32), which is connected to the switch (4).

3. The PCB positioning fixture according to claim 2, characterized in that, The substrate (1) has an operation port corresponding to the switch (4). The switch (4) is connected to an operation handle (41). The operation handle (41) is located on the front side and passes through the operation port to connect with the switch (4).

4. The PCB positioning fixture according to claim 3, characterized in that, A pressure gauge (5) is also provided on the front side of the substrate (1), and the pressure gauge (5) is connected to the switch (4) and the diversion valve (32).

5. The PCB positioning fixture according to claim 1, characterized in that, The substrate (1) has a plurality of positioning posts (12) on its front side, and the plate (2) has positioning holes (21) corresponding to the positioning posts (12).

6. The PCB positioning fixture according to claim 5, characterized in that, Limiting blocks (6) are also provided on the front side of the substrate (1) corresponding to the corners of the plate (2).

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