Quick replacement type PCB steel mesh structure

Abstract

The utility model discloses a quick replacement type PCB steel mesh structure, which comprises a steel mesh main body, the outer side of the steel mesh main body is sleeved with a protection frame, the inner side of the protection frame is provided with a slot, the two sides of the protection frame are both fixedly provided with rotating seats, rotating shafts are movably installed in the rotating seats, one side of each rotating shaft is movably connected with a rotating rod, and the other side of each rotating rod is movably connected with a connecting rod. A locking block is fixed to one end of the rotating rod, and a limiting frame is installed on one side of the protection frame. According to the PCB steel mesh structure capable of being replaced rapidly, through cooperative use of the inserting grooves, the rotating seats, the rotating shafts, the rotating rods, the locking blocks, the limiting frames, fixing blocks and lock holes, when the steel mesh body in the protection frame needs to be replaced, the locking blocks can be rotated to the horizontal position, and therefore the locking blocks can penetrate through the fixing blocks to enable the limiting frames to be detached, and the steel mesh body can be replaced conveniently. According to the device, the steel mesh main body can be replaced without other tools in the process of replacing the steel mesh main body, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB stencils, in particular to a quick replacement type PCB stencil structure. Background Technique

[0002] The stencil, that is, the SMT template, is a special SMT mold, and its main function is to help the deposition of solder paste; the purpose is to transfer an accurate amount of solder paste to the accurate position on the empty PCB. The stencil was originally made of wire mesh, so it was called a screen plate at that time. It was initially a nylon mesh. Later, due to durability, wire mesh and copper mesh appeared. Finally, it was a stainless steel wire mesh. However, no matter what material the wire mesh is made of, it has the disadvantages of poor forming and low precision. The PCB stencil plays a key role in the PCB manufacturing process.

[0003] However, the existing PCB stencil is connected to the outer frame by bolts during use. When it is necessary to replace different PCB stencils, it is not convenient to disassemble and assemble the PCB stencil. Therefore, this application provides a quick replacement type PCB stencil structure to meet the needs. Content of the Utility Model

[0004] The purpose of the utility model is to provide a quick replacement type PCB stencil structure to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A quick replacement type PCB stencil structure, including a stencil main body, a protection frame is sleeved outside the stencil main body, a slot is opened inside the protection frame, a rotating seat is fixed on both sides of the protection frame, a rotating shaft is movably installed inside the rotating seat, a rotating rod is movably connected to one side of the rotating shaft, a locking block is fixed at one end of the rotating rod, a limiting frame is installed on one side of the protection frame, fixing blocks are fixed on both sides of the limiting frame, a locking hole is opened inside the fixing block, fixing pieces are fixed on both sides of the protection frame, and a fixing hole is opened above the fixing piece.

[0006] Preferably, the stencil main body and the protection frame form a sliding structure through the slot, and the size of the slot is consistent with the size of the stencil main body.

[0007] Preferably, the rotating rod and the rotating seat form a rotating structure through the rotating shaft, and the rotating seats are symmetrically arranged with respect to the central axis of the protection frame.

[0008] Preferably, the locking block and the fixing block form a rotating structure through the rotating rod, and the locking block and the locking hole have the same shape.

[0009] Preferably, a bottom plate is arranged below the protection frame, a PCB board is installed above the bottom plate, and fixing columns are fixed on both sides above the PCB board.

[0010] Preferably, the fixing columns are symmetrically arranged with respect to the central axis of the bottom plate, and the fixing columns and the fixing holes have the same diameter.

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

[0012] 1. For this quick-change PCB stencil structure, through the combined use of the slot, rotating seat, rotating shaft, rotating rod, locking block, limiting frame, fixing block and locking hole, when it is necessary to replace the stencil body inside the protection frame, the locking block can be rotated to the horizontal position, so that the locking block can pass through the fixing block and the limiting frame can be removed, thereby enabling the stencil body to be quickly withdrawn from the inside of the protection frame for replacement. This device can complete the replacement of the stencil body without the aid of other tools during the process, saving time and effort;

[0013] 2. For this quick-change PCB stencil structure, through the arrangement of the fixing piece, fixing hole, bottom plate, PCB board and fixing column, when the stencil body is in use, the protection frame is placed above the bottom plate, and the fixing piece is sleeved outside the fixing column so that the stencil body corresponds to the PCB board below, which can improve the stability of the PCB board and the stencil body during solder paste printing and facilitate the detachment of the PCB board and the stencil body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the protection frame of the present utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the locking block of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the bottom plate of the present utility model.

[0018] In the figure: 1, stencil body; 2, protection frame; 3, slot; 4, rotating seat; 5, rotating shaft; 6, rotating rod; 7, locking block; 8, limiting frame; 9, fixing block; 10, locking hole; 11, fixing piece; 12, fixing hole; 13, bottom plate; 14, PCB board; 15, fixing column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 , the present utility model provides a technical solution: a quick-replaceable PCB stencil structure, which includes a stencil main body 1. A protection frame 2 is sleeved outside the stencil main body 1. A slot 3 is opened inside the protection frame 2. The stencil main body 1 and the protection frame 2 form a sliding structure through the slot 3. The size of the slot 3 conforms to the size of the stencil main body 1. The stencil main body 1 can be stuck inside the protection frame 2. The protection effect of the protection frame 2 can prevent the stencil main body 1 from deforming during use. Rotating seats 4 are fixed on both sides of the protection frame 2. A rotating shaft 5 is movably installed inside the rotating seat 4. One side of the rotating shaft 5 is movably connected to a rotating rod 6. The rotating rod 6 and the rotating seat 4 form a rotating structure through the rotating shaft 5. The rotating seats 4 are symmetrically arranged with respect to the central axis of the protection frame 2. The rotating rod 6 can be folded, and the structure is relatively flexible. A lock block 7 is fixed at one end of the rotating rod 6. A limit frame 8 is installed on one side of the protection frame 2. Fixed blocks 9 are fixed on both sides of the limit frame 8. A lock hole 10 is opened inside the fixed block 9. The lock block 7 and the fixed block 9 form a rotating structure through the rotating rod 6. The lock block 7 and the lock hole 10 have the same shape. When it is necessary to replace the stencil main body 1 inside the protection frame 2, the lock block 7 can be rotated to the horizontal position, so that the lock block 7 can pass through the fixed block 9 and the limit frame 8 can be removed, so that the stencil main body 1 can be quickly withdrawn from the inside of the protection frame 2 for replacement;

[0021] Please refer to Figure 2 and Figure 4 , fixed pieces 11 are fixed on both sides of the protection frame 2. Fixing holes 12 are opened above the fixed pieces 11. A bottom plate 13 is arranged below the protection frame 2. A PCB board 14 is installed above the bottom plate 13. Fixing columns 15 are fixed on both sides above the PCB board 14, which facilitates the separation of the PCB board 14 and the stencil main body 1 and improves the processing efficiency of the PCB board 14. The fixing columns 15 are symmetrically arranged with respect to the central axis of the bottom plate 13. The fixing columns 15 and the fixing holes 12 have the same diameter. When the stencil main body 1 is in use, the protection frame 2 is placed above the bottom plate 13, and the fixed pieces 11 are sleeved outside the fixing columns 15 so that the stencil main body 1 corresponds to the PCB board 14 below, which can improve the stability of the PCB board 14 and the stencil main body 1 during solder paste printing.

[0022] Working principle: When using this quick-change PCB stencil structure, first place the protection frame 2 above the bottom plate 13 when using the stencil main body 1, and put the fixing piece 11 on the outside of the fixing column 15 so that the stencil main body 1 corresponds to the PCB board 14 below, which can improve the stability of the PCB board 14 and the stencil main body 1 during solder paste printing. Secondly, when it is necessary to replace the stencil main body 1 inside the protection frame 2, the lock block 7 can be rotated to the horizontal position, so that the lock block 7 can pass through the fixing block 9 and the limit frame 8 can be removed, so that the stencil main body 1 can be quickly withdrawn from the inside of the protection frame 2 for replacement. Just like this, the use process of this quick-change PCB stencil structure is completed.

[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-change PCB steel mesh structure, comprising a steel mesh body (1), characterized in that: A protective frame (2) is sleeved on the outer side of the steel mesh body (1), a slot (3) is provided on the inner side of the protective frame (2), rotating seats (4) are fixed on both sides of the protective frame (2), a rotating shaft (5) is movably installed inside the rotating seat (4), one side of the rotating shaft (5) is movably connected to a rotating rod (6), one end of the rotating rod (6) is fixed with a locking block (7), a limiting frame (8) is installed on one side of the protective frame (2), fixed blocks (9) are fixed on both sides of the limiting frame (8), locking holes (10) are provided inside the fixed blocks (9), and fixing plates (11) are fixed on both sides of the protective frame (2), and a fixing hole (12) is provided above the fixing plate (11).

2. The quick-change PCB steel mesh structure according to claim 1, characterized in that: The steel mesh body (1) forms a sliding structure with the protection frame (2) via a slot (3), and the size of the slot (3) matches the size of the steel mesh body (1).

3. The quick-change PCB steel mesh structure according to claim 1, characterized in that: The rotating rod (6) forms a rotating structure with the rotating seat (4) via the rotating shaft (5); the rotating seat (4) is symmetrically arranged with respect to the central axis of the protection frame (2).

4. The quick-change PCB steel mesh structure according to claim 1, characterized in that: The locking block (7) forms a rotating structure with the rotating rod (6) and the fixing block (9), and the locking block (7) and the locking hole (10) have the same shape.

5. The quick-change PCB steel mesh structure according to claim 1, characterized in that: A bottom plate (13) is arranged below the protection frame (2), a PCB board (14) is installed above the bottom plate (13), and fixing columns (15) are fixed on both sides above the PCB board (14).

6. The quick-change PCB steel mesh structure according to claim 5, characterized in that: The fixing column (15) is symmetrically arranged with respect to the central axis of the bottom plate (13), and the diameter of the fixing column (15) is the same as that of the fixing hole (12).

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