Tin falling steel mesh for PCB (printed circuit board) welding

Abstract

The utility model discloses a tin falling steel mesh for PCB (printed circuit board) welding, which comprises a protective sleeve, a first sliding groove is arranged on the inner side of the protective sleeve, clamping sleeves are fixed on two sides of the protective sleeve, a protective cover is mounted on one side of the protective sleeve, buckles are fixed on two sides of the protective cover, a screw hole is arranged on the surface of one side of the protective cover, and the protective cover is provided with a plurality of threaded holes. A limiting block is fixed to one side of the protective cover, a sliding block is arranged on one side of the limiting block in a sleeving mode, second sliding grooves are formed in the two sides of the sliding block, and a rotating shaft is installed on one side of the sliding block; according to the tin falling steel mesh for PCB welding, limiting blocks, sliding blocks, second sliding grooves, bolts, a steel mesh body and screw holes are arranged, in the using process of the device, by rotating the bolts, under the limitation of the limiting blocks, the sliding blocks slide, a PCB is fixed, dislocation of the PCB and the steel mesh body is prevented, and the welding quality of the PCB is improved. The solder paste is ensured to accurately fall on the required position of the PCB, and the welding quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field related to PCB circuit board welding, in particular to a tin-dropping steel net for PCB circuit board welding. Background Art

[0002] PCB circuit board welding is a manufacturing process and technology. Its main purpose is to connect electronic components with wires or pads on the PCB circuit board through heating, high temperature, high pressure and other means to ensure reliable electrical connection between them and achieve mechanical fixation. The main function of the tin-dropping steel mesh for PCB circuit board welding is to transfer an accurate amount of solder paste to the exact position on the PCB circuit board. Holes corresponding to the pads of the PCB circuit board are carved on the tin-dropping steel mesh. During printing, the solder paste is applied above the steel mesh, the PCB circuit board is placed under the steel mesh, and then the solder paste is evenly scraped on the steel mesh holes with a scraper, and the chip components are affixed. After uniform reflow soldering, the chip components can be installed on the PCB circuit board.

[0003] During the use of the existing tin-dropping steel mesh for PCB circuit board welding, when applying solder paste on the steel mesh, there is a risk of misalignment between the PCB circuit board and the steel mesh, resulting in a shift in the position where the solder paste falls on the PCB circuit board. Therefore, it is necessary to propose a tin-dropping steel mesh for PCB circuit board welding. Utility Model Content

[0004] The utility model aims to provide a tin-dropping steel mesh for PCB circuit board welding to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tin-dropping steel mesh for PCB circuit board welding, comprising a protective sleeve, a first slide groove is provided on the inner side of the protective sleeve, clamping sleeves are fixed on both sides of the protective sleeve, a protective cover is installed on one side of the protective sleeve, buckles are fixed on both sides of the protective cover, screw holes are provided on the surface of one side of the protective cover, a limiting block is fixed on one side of the protective cover, a sliding block is sleeved on one side of the limiting block, second slide grooves are provided on both sides of the sliding block, a rotating shaft is installed on one side of the sliding block, a bolt is movably connected to one side of the rotating shaft, a steel mesh body is installed on the inner side of the protective sleeve, and a wear-resistant sleeve is sleeved on the surface of the steel mesh body.

[0006] Preferably, the protective cover is snap-fitted to the protective sleeve via a buckle, and the buckle is symmetrically arranged with respect to the central axis of the protective cover.

[0007] Preferably, the limit block is connected to the protective cover by welding, and the limit block is symmetrically arranged with respect to the central axis of the sliding block.

[0008] Preferably, the sliding block forms a sliding structure through a bolt protection sleeve, and the sliding block is arranged in an "I"-shaped structure.

[0009] Preferably, the bolt forms a rotating structure through the rotating shaft and the sliding block, and the bolt is used in conjunction with the screw hole.

[0010] Preferably, the steel mesh body forms a sliding structure with the protective cover through the first sliding groove, and the outer shape of the steel mesh body is consistent with the inner shape of the first sliding groove.

[0011] Preferably, the inner shape of the wear-resistant sleeve is consistent with the outer shape of the steel mesh body, and the wear-resistant sleeve is made of polytetrafluoroethylene material.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The tin-dropping steel mesh for PCB circuit board welding is provided with a limit block, a sliding block, a second slide groove, a bolt, a steel mesh body and a screw hole. During the use of the device, the bolt is rotated to make the sliding block slide under the restriction of the limit block to fix the PCB circuit board, prevent the PCB circuit board and the steel mesh body from being misaligned, ensure that the solder paste accurately falls on the required position of the PCB circuit board, and ensure the welding quality;

[0014] 2. The tin-dropping steel mesh for PCB circuit board welding is provided with a protective sleeve, a clamping sleeve, a protective cover, a buckle and a steel mesh body. During the use of the device, the buckle is clamped by the clamping sleeve, and the protective sleeve and the protective cover are connected to protect the steel mesh body, thereby preventing the steel mesh body from being damaged due to accidental falling, thereby increasing the service life of the steel mesh body;

[0015] 3. This tin-removing steel mesh for PCB circuit board welding has a steel mesh body and a wear-resistant sleeve. During the use of the device, the steel mesh body is protected by the wear-resistant sleeve. The wear-resistant sleeve is made of polytetrafluoroethylene material to enhance the hardness and corrosion resistance of the steel mesh body and reduce the accuracy loss caused by wear during long-term use. The friction coefficient of polytetrafluoroethylene is extremely low, which makes the steel mesh body easier to clean and improves the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall disassembled structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the protective cover of the utility model;

[0019] Figure 4 This is a schematic diagram of the bolt structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the wear-resistant sleeve of the utility model.

[0021] In the figure: 1. protective sleeve; 2. first slide groove; 3. clamping sleeve; 4. protective cover; 5. buckle; 6. limit block; 7. sliding block; 8. second slide groove; 9. bolt; 10. steel mesh body; 11. wear-resistant sleeve; 12. screw hole; 13. rotating shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-2 The utility model provides a technical solution: a tin-dropping steel mesh for PCB circuit board welding, comprising a protective sleeve 1, a first slide groove 2 is opened on the inner side of the protective sleeve 1, clamping sleeves 3 are fixed on both sides of the protective sleeve 1, a protective cover 4 is installed on one side of the protective sleeve 1, buckles 5 are fixed on both sides of the protective cover 4, the protective cover 4 is connected to the protective sleeve 1 by the buckles 5, the buckles 5 are symmetrically arranged with the central axis of the protective cover 4, the buckles 5 are engaged by the clamping sleeve 3, the protective sleeve 1 and the protective cover 4 are connected, the steel mesh body 10 is protected to prevent the steel mesh body 10 from being damaged due to accidental falling, and the service life of the steel mesh body 10 is improved.

[0024] See also Figure 2-4 A screw hole 12 is provided on one side of the protective cover 4, a limit block 6 is fixed on one side of the protective cover 4, a sliding block 7 is sleeved on one side of the limit block 6, the limit block 6 and the protective cover 4 are welded, the limit block 6 is symmetrically arranged with the central axis of the sliding block 7, so that the sliding block 7 slides under the restriction of the limit block 6, so that the sliding block 7 slides stably and is not easy to deviate up and down, and a second slide groove 8 is provided on both sides of the sliding block 7, a rotating shaft 13 is installed on one side of the sliding block 7, and a bolt 9 is movably connected to one side of the rotating shaft 13, and the bolt 9 passes through the rotating shaft 13 and the sliding block 7 form a rotating structure, the bolt 9 is used in conjunction with the screw hole 12, and the sliding block 7 is moved by sliding the sliding block 7 and rotating the bolt 9 in the screw hole 12. A steel mesh body 10 is installed on the inner side of the protective cover 1. The sliding block 7 forms a sliding structure through the bolt 9 protective cover 1. The sliding block 7 is an "I"-shaped structure, which fixes the PCB circuit board to prevent the PCB circuit board from being misaligned with the steel mesh body 10, and ensures that the solder paste falls accurately on the required position of the PCB circuit board, thereby ensuring the welding quality.

[0025] See also Figure 2and Figure 5 A wear-resistant sleeve 11 is provided on the surface of the steel mesh body 10. The steel mesh body 10 forms a sliding structure with the protective sleeve 1 through the first slide groove 2. The external shape of the steel mesh body 10 is consistent with the internal shape of the first slide groove 2, which is convenient for replacing the steel mesh body 10 to process different PCB circuit boards. The internal shape of the wear-resistant sleeve 11 is consistent with the external shape of the steel mesh body 10. The wear-resistant sleeve 11 is made of polytetrafluoroethylene material. The steel mesh body 10 is protected by the wear-resistant sleeve 11. The wear-resistant sleeve 11 is made of polytetrafluoroethylene material to enhance the hardness and corrosion resistance of the steel mesh body 10 and reduce the decrease in precision caused by wear during long-term use. The friction coefficient of polytetrafluoroethylene is extremely low, which makes the steel mesh body 10 easier to clean and improves the practicality of the device.

[0026] Working principle: When using the tin-dropping steel mesh for PCB circuit board welding, first, slide the steel mesh body 10 into the protective sleeve 1, and the clamping sleeve 3 will snap the buckle 5, and connect the protective sleeve 1 and the protective cover 4 to protect the steel mesh body 10 to prevent the steel mesh body 10 from being damaged due to accidental falling. After aligning the steel mesh body 10 with the PCB circuit board, turn the bolt 9, and under the restriction of the limit block 6, slide the sliding block 7 to fix the PCB circuit board to prevent the PCB circuit board from being misaligned with the steel mesh body 10, and ensure that the solder paste falls accurately on the PCB. After the solder paste is applied to the required position of the circuit board, the bolt 9 can be turned to remove the steel mesh body 10 from the PCB circuit board. When cleaning the steel mesh body 10, the wear-resistant sleeve 11 protects the steel mesh body 10, and the wear-resistant sleeve 11 is made of polytetrafluoroethylene material to enhance the hardness and corrosion resistance of the steel mesh body 10 and reduce the accuracy loss caused by wear during long-term use. The friction coefficient of polytetrafluoroethylene is extremely low, making the steel mesh body 10 easier to clean. In this way, the use process of the tin-dropping steel mesh for PCB circuit board welding is completed.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tin-dropping steel mesh for PCB circuit board welding, comprising a protective cover (1), characterized in that: A first slide groove (2) is provided on the inner side of the protective sleeve (1), and clamping sleeves (3) are fixed on both sides of the protective sleeve (1). A protective cover (4) is installed on one side of the protective sleeve (1), and buckles (5) are fixed on both sides of the protective cover (4). A screw hole (12) is provided on the surface of one side of the protective cover (4). A limiting block (6) is fixed on one side of the protective cover (4), and a sliding block (7) is sleeved on one side of the limiting block (6). Second slide grooves (8) are provided on both sides of the sliding block (7), and a rotating shaft (13) is installed on one side of the sliding block (7), and a bolt (9) is movably connected to one side of the rotating shaft (13). A steel mesh body (10) is installed on the inner side of the protective sleeve (1), and a wear-resistant sleeve (11) is sleeved on the surface of the steel mesh body (10).

2. The tin-dropping steel mesh for PCB circuit board welding according to claim 1 is characterized in that: The protective cover (4) is snap-fitted and connected to the protective sleeve (1) via a buckle (5), and the buckle (5) is symmetrically arranged with respect to the central axis of the protective cover (4).

3. The tin-dropping steel mesh for PCB circuit board welding according to claim 1 is characterized in that: The limit block (6) is connected to the protective cover (4) by welding, and the limit block (6) is symmetrically arranged with respect to the central axis of the sliding block (7).

4. The tin-dropping steel mesh for PCB circuit board welding according to claim 1, characterized in that: The sliding block (7) is connected to a bolt (9) and a protective sleeve (1) to form a sliding structure, and the sliding block (7) is arranged in an "I"-shaped structure.

5. The tin-dropping steel mesh for PCB circuit board welding according to claim 1, characterized in that: The bolt (9) forms a rotating structure with the sliding block (7) through the rotating shaft (13), and the bolt (9) is used in conjunction with the screw hole (12).

6. The tin-dropping steel mesh for PCB circuit board welding according to claim 1, characterized in that: The steel mesh body (10) forms a sliding structure with the protective cover (1) through the first sliding groove (2), and the external shape of the steel mesh body (10) is consistent with the internal shape of the first sliding groove (2).

7. The tin-dropping steel mesh for PCB circuit board welding according to claim 1, characterized in that: The internal shape of the wear-resistant sleeve (11) is consistent with the external shape of the steel mesh body (10), and the wear-resistant sleeve (11) is made of polytetrafluoroethylene material.

Images