PCB steel mesh anti-welding bridge structure

Abstract

The utility model relates to the technical field of electronic circuit boards, in particular to a PCB (printed circuit board) steel mesh anti-welding bridge structure, which comprises a frame body, the inside of the frame body is hollow, the inside of the frame body is fixedly connected with a telescopic assembly, the telescopic assembly comprises a first lead screw, one end of the first lead screw is fixedly connected with a telescopic knob, and the other end of the first lead screw is fixedly connected with a second lead screw. The telescopic knob is used for controlling rotation of the first lead screw, the surface of the first lead screw is in threaded connection with two sliding blocks, the two sliding blocks are connected with a first sliding rod and a second sliding rod respectively, the two sides of the second sliding rod are through, and the first sliding rod penetrates out of the through position of the second sliding rod. Fixing assemblies are fixedly connected to the ends, away from the sliding blocks, of the first sliding rods and the second sliding rods, a clamping assembly is fixedly connected to one side of the frame body, a telescopic assembly is arranged, the tension of the steel mesh is increased through hooks, the surface of the steel mesh is smooth in the printing process, and therefore the printing precision of solder resist paste is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuit boards, and more specifically, to a solder bridge prevention structure for a PCB stencil. Background Art

[0002] The solder bridge prevention of a PCB stencil is an important link in the PCB manufacturing process, aiming to prevent unexpected electrical connections, i.e., solder bridges, during the soldering process.

[0003] The width of the solder resist bridge should be determined according to the design requirements of the PCB and the type of solder. For example, in some cases, the width of the solder resist bridge may need to reach 4 mil or more.

[0004] Pad spacing: The size of the pad spacing directly affects the risk of solder bridges. Smaller pad spacing may cause solder to overflow during soldering and form solder bridges.

[0005] A solder bridge refers to an electrical connection formed between two points that are not designed for electrical connection due to improper flow of solder during the PCB soldering process. This may lead to a short circuit in the circuit, affecting the normal operation of the PCB. Preventing solder bridges is crucial for ensuring the quality and reliability of the PCB. Solder bridges may cause circuit failures, equipment damage, and even safety hazards. The tension of the stencil is crucial for the uniform flow of solder. Appropriate mesh tension can ensure the flatness of the stencil surface and prevent uneven flow of solder during printing.

[0006] In view of this, there is an urgent need for a solder bridge prevention structure for a PCB stencil to improve the deficiencies of the existing technology. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a solder bridge prevention structure for a PCB stencil to solve the problems raised in the above background art.

[0008] To achieve the above purpose, the present utility model provides a solder bridge prevention structure for a PCB stencil, including a frame body. The interior of the frame body is hollow. A telescopic component is fixedly connected inside the frame body. The telescopic component includes a first lead screw. One end of the first lead screw is fixedly connected with a telescopic knob for controlling the rotation of the first lead screw. Two sliding blocks are threadedly connected to the surface of the first lead screw. The two sliding blocks are respectively connected with a first sliding rod and a second sliding rod. The two sides of the second sliding rod are penetrated. The first sliding rod passes through the penetration of the second sliding rod. The ends of the first sliding rod and the second sliding rod away from the sliding blocks are fixedly connected with a fixing component. A clamping component is fixedly connected to one side of the frame body.

[0009] As a further improvement of the technical solution, the fixing component includes a fixing plate. Two sliding grooves are provided on one side of the fixing plate. The first sliding rod and the second sliding rod are slidably connected to the sliding grooves of the fixing plate. A sliding track is provided on the other side of the fixing plate, and a hook is slidably connected to the sliding track.

[0010] As a further improvement of the technical solution, the clamping component includes a second screw rod. The second screw rod is rotatably connected to the frame body. One end of the second screw rod is fixedly connected with a clamping knob. The clamping knob is used to drive the rotation of the second screw rod. A clamping block is threadedly connected to the surface of the second screw rod.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the solder mask bridge structure of the PCB stencil, a telescopic component is provided. The tension of the stencil is increased through the hook. The tension of the solder mask bridge of the stencil directly affects the uniformity of the solder resist paste during the printing process. Appropriate tension can ensure the flatness of the stencil surface and prevent local deformation caused by uneven tension, thereby ensuring the thickness and distribution uniformity of the solder resist paste on the entire stencil surface and avoiding areas with uneven thickness. Tension has a direct impact on the deformation and dimensional stability of the stencil. Increasing the tension of the stencil makes the stencil surface flat during the printing process, thereby improving the printing accuracy of the solder resist paste. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1;

[0014] Figure 2 It is a schematic diagram of the overall sectional structure of Embodiment 1;

[0015] Figure 3 It is a schematic diagram of the internal structure of Embodiment 1;

[0016] Figure 4 It is a schematic diagram of the clamping component structure of Embodiment 1.

[0017] The meanings of the various reference numerals in the figure are as follows:

[0018] 1. Frame body;

[0019] 2. Telescopic component; 20. First screw rod; 21. Sliding block; 22. Telescopic knob; 23. First sliding rod; 24. Second sliding rod;

[0020] 3. Fixing component; 30. Fixing plate; 31. Hook;

[0021] 4. Clamping component; 40. Second screw rod; 41. Clamping knob; 42. Clamping block. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment

[0024] Please refer to Figures 1-4 As shown, this embodiment provides a solder mask bridge prevention structure for a PCB stencil, including a frame body 1 with a hollow interior. A telescopic component 2 is fixedly connected inside the frame body 1. The telescopic component 2 includes a first lead screw 20. One end of the first lead screw 20 is fixedly connected with a telescopic knob 22 for controlling the rotation of the first lead screw 20. Two sliding blocks 21 are threadedly connected to the surface of the first lead screw 20. The two sliding blocks 21 are respectively connected with a first sliding rod 23 and a second sliding rod 24. The two sides of the second sliding rod 24 are penetrated, and the first sliding rod 23 passes through the penetration of the second sliding rod 24. The ends of the first sliding rod 23 and the second sliding rod 24 away from the sliding blocks 21 are fixedly connected with a fixing component 3. A clamping component 4 is fixedly connected to one side of the frame body 1.

[0025] The above working principle: First, two fixing holes are provided on both sides of the stencil designed and manufactured. The stencil is fixed through the fixing component 3 from the fixing holes. Rotate the telescopic knob 22, which drives the rotation of the first lead screw 20. The position of the sliding block 21 is adjusted through the thread to adjust the angles of the first sliding rod and the second sliding rod, so as to adjust the stencil to maintain an appropriate tension. Place the circuit board to be printed in the clamping component 4, and then the printing work of the circuit board can be carried out.

[0026] In order to fix the stencil, in this embodiment, the fixing component 3 includes a fixing plate 30. There are two chutes on one side of the fixing plate 30. The first sliding rod 23 and the second sliding rod 24 are slidably connected to the chutes of the fixing plate 30. There is a slideway on the other side of the fixing plate 30, and a hook 31 is slidably connected to the slideway. The surface of the stencil is smooth, and the stencil is hooked through the opening hook 31 type, so that the tension of the stencil is increased and the surface remains flat. Appropriate grid tension can ensure the flatness of the stencil surface and prevent uneven flow of solder during the printing process.

[0027] In order to fix the circuit board, in this embodiment, the clamping assembly 4 includes a second screw rod 40 which is rotatably connected to the frame 1. One end of the second screw rod 40 is fixedly connected with a clamping knob 41 which is used to drive the rotation of the second screw rod 40. A clamping block 42 is threadedly connected to the surface of the second screw rod 40. By driving the rotation of the second screw rod 40 with the clamping knob 41, the fixing block moves on the second screw rod 40 to fix the circuit board to be printed, improving the printing accuracy and stability.

[0028] When a PCB stencil anti-solder bridge structure in this embodiment is specifically used, first, two fixing holes are arranged on both sides of the designed and manufactured stencil. The hook 31 is adjusted to a suitable position on the fixing plate 30, and the hook 31 is hooked to the fixing hole of the stencil. The telescopic knob 22 is rotated, and the telescopic knob 22 drives the rotation of the first screw rod 20. The position of the sliding block 21 is adjusted through the thread to adjust the angles of the first slide bar and the second slide bar, so as to adjust the stencil to maintain a suitable tension. The circuit board to be printed is placed in the clamping assembly 4. By driving the rotation of the second screw rod 40 with the clamping knob 41, the fixing block moves on the second screw rod 40 to fix the circuit board to be printed, improving the printing accuracy and stability, and thus the circuit board can be printed.

[0029] The above shows and describes 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 by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A solder mask bridge structure for a PCB, characterized in that: It includes a housing (1) with a hollow interior. A telescopic component (2) is fixedly connected inside the housing (1). The telescopic component (2) includes a first lead screw (20). One end of the first lead screw (20) is fixedly connected with a telescopic knob (22) which is used to control the rotation of the first lead screw (20). Two sliding blocks (21) are threadedly connected to the surface of the first lead screw (20). The two sliding blocks (21) are respectively connected with a first sliding rod (23) and a second sliding rod (24). The two sides of the second sliding rod (24) are penetrated, and the first sliding rod (23) passes through the penetration of the second sliding rod (24). The ends of the first sliding rod (23) and the second sliding rod (24) far away from the sliding blocks (21) are fixedly connected with a fixing component (3). A clamping component (4) is fixedly connected to one side of the housing (1).

2. The solder mask bridge structure of the PCB stencil according to claim 1, wherein: The fixing component (3) includes a fixing plate (30). There are two chutes on one side of the fixing plate (30). The first sliding rod (23) and the second sliding rod (24) are slidably connected to the chutes of the fixing plate (30). There is a slideway on the other side of the fixing plate (30), and a hook (31) is slidably connected to the slideway.

3. The solder mask bridge structure of the PCB stencil according to claim 1, wherein: The clamping component (4) includes a second lead screw (40) which is rotatably connected to the housing (1). One end of the second lead screw (40) is fixedly connected with a clamping knob (41) which is used to drive the rotation of the second lead screw (40). A clamping block (42) is threadedly connected to the surface of the second lead screw (40).

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