Comprehensive compatible PCB steel mesh frame

Abstract

The utility model relates to the technical field of PCB steel meshes, in particular to a fully compatible PCB steel mesh frame. The device comprises a frame body and a steel mesh body, the steel mesh body is arranged in the frame body, mounting grooves are formed in the periphery of the surface of the frame body, limiting and fixing mechanisms are mounted in the mounting grooves and used for limiting and fixing the steel mesh body, and supporting plates are mounted on the periphery of the inner wall of the frame body; wherein the supporting plate is used for supporting and placing the steel mesh body, and the limiting and fixing mechanism comprises a mounting plate and a fixing plate. By arranging the limiting and fixing mechanism, a traditional mode that a plurality of inserting grooves are formed for installing and fixing the steel mesh body is omitted, the steel mesh body can be rapidly installed and fixed, disassembly is convenient and rapid, production efficiency is improved, meanwhile, the frame body can be directly cleaned conveniently, and the production cost is reduced. And steel mesh position deviation caused by accumulation of solder paste, dust or other pollutants is avoided, and the solder paste printing precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB stencils, and more specifically, to a PCB stencil frame that is fully compatible. Background Technique

[0002] The PCB is used in the electronic circuits of equipment, providing mechanical support and conductive paths for various electronic components. It is made by combining different non-conductive material sheets, such as fiberglass or plastic, printed or etched with circuits, so it is called a circuit board. The copper circuits on the PCB connect electrical components and transmit electrical signals back and forth. The PCB exists in almost all electronic and computing devices, including motherboards, network cards, and graphics cards, as well as hard drives and various household appliances. The PCB stencil is a tool used to precisely coat solder paste on the printed circuit board. When using the PCB stencil, a PCB stencil frame is needed to fix and position the PCB stencil to ensure that the solder paste can be precisely printed on the PCB. Existing PCB stencil frames are generally designed to be fully compatible, that is, they can adapt to various PCB stencils of different sizes and shapes;

[0003] However, in the actual use process, several slots usually need to be opened on the PCB stencil frame to install and fix the PCB stencil. When the PCB stencil needs to be installed and replaced, the PCB stencil frame and the PCB stencil are disassembled and separated, and the operation is relatively complex, reducing production efficiency. Moreover, during long-term use, solder paste, dust, or other contaminants may accumulate inside the fixing points of the slots opened on the PCB stencil frame, which is inconvenient to clean and may cause the position of the stencil to shift, affecting the accuracy of solder paste printing. It may also fall off and contaminate the PCB board, affecting the function of the circuit. In view of this, we propose a PCB stencil frame that is fully compatible. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a PCB stencil frame that is fully compatible to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present utility model provides a PCB stencil frame that is fully compatible, including a frame body and a stencil body. The stencil body is arranged inside the frame body. Installation grooves are opened on the periphery of the surface of the frame body, and a limit fixing mechanism is installed inside the installation grooves. The limit fixing mechanism is used to limit and fix the stencil body. Support plates are installed on the inner walls of the four sides of the frame body. Among them: the support plates are used to support and place the stencil body.

[0006] As a further improvement of this technical solution, the limit fixing mechanism includes a mounting plate. A chute is opened on the surface of the mounting plate. A support rod is arranged inside the chute. A limit plate is fixedly connected to the lower surface of the support rod. A connecting column is installed on the upper surface of the mounting plate. Among them: a return spring is jointly connected between the support rod and the connecting column.

[0007] As a further improvement of the present technical solution, the limiting and fixing mechanism further includes a fixing plate, one end of the fixing plate is connected to the top end of the support rod, a limiting groove is formed on the surface of the fixing plate, and a stop block is fixedly connected to the upper surface of the fixing plate.

[0008] As a further improvement of the present technical solution, a base is installed on the upper surface of the mounting plate, an adjusting rod is fixedly connected to the upper surface of the base, the adjusting rod is arranged in a threaded structure, and a compression spring is arranged on the side surface of the adjusting rod shaft. Among them: the top end of the compression spring is fixedly connected to the lower surface of the fixing plate, and the bottom end is fixedly connected to the upper surface of the base.

[0009] As a further improvement of the present technical solution, the adjusting rod is arranged inside the limiting groove, the upper end of the outer wall of the adjusting rod is in threaded fit with a sleeve, a push plate is fixedly connected to the bottom end of the outer wall of the sleeve, and a rotating handle is fixedly connected to the top end of the outer wall of the sleeve.

[0010] As a further improvement of the present technical solution, the length of the limiting plate is greater than the width of the sliding groove, and the diameter of the sleeve is greater than the width of the limiting groove.

[0011] As a further improvement of the present technical solution, the push plate is arranged in an acute triangle structure.

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

[0013] In the fully compatible PCB stencil frame, by setting the limiting and fixing mechanism, the traditional installation and fixing of the stencil body by opening a plurality of slots is cancelled, the stencil body can be quickly installed and fixed, and the disassembly is convenient and fast, improving production efficiency. At the same time, it is convenient to directly clean the frame body, avoiding the accumulation of solder paste, dust or other pollutants, resulting in the offset of the stencil position, and ensuring the accuracy of solder paste printing. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 is the partial overall structure diagram of the present utility model;

[0016] Figure 3 is the limiting and fixing structure diagram of the present utility model.

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

[0018] 1. Frame body; 2. Stencil body; 3. Limit fixing mechanism; 10. Support plate; 30. Mounting plate; 301. Chute; 302. Support rod; 303. Limit plate; 304. Connecting column; 305. Return spring; 31. Fixed plate; 310. Limit groove; 311. Stopper; 306. Base; 307. Adjusting rod; 308. Compression spring; 309. Sleeve; 3091. Push plate; 3092. Rotating handle. Detailed implementation mode

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0020] The PCB is used for the electronic circuit in the device and provides mechanical support and conductive paths for various electronic components. It is made by combining different non-conductive material sheets, such as fiberglass or plastic, printed or etched with circuits, so it is called a circuit board. The copper circuits on the PCB connect electrical components and transmit electrical signals back and forth. The PCB exists in almost all electronic and computing devices, including motherboards, network cards, and graphics cards, as well as hard drives and various household appliances. The PCB stencil is a tool used to precisely coat solder paste on the printed circuit board. When using the PCB stencil, a PCB stencil frame is required to fix and position the PCB stencil to ensure that the solder paste can be precisely printed on the PCB. The existing PCB stencil frames are generally designed to be fully compatible, that is, they can adapt to various PCB stencils of different sizes and shapes.

[0021] Please refer to Figures 1 - 3As shown, the present embodiment provides a fully compatible PCB steel mesh frame, including a frame body 1 and a steel mesh body 2, the steel mesh body 2 is arranged inside the frame body 1, considering that in actual use, it is usually necessary to open a number of slots on the PCB steel mesh frame to install and fix the PCB steel mesh, when the PCB steel mesh needs to be installed and replaced, the PCB steel mesh frame and the PCB steel mesh are disassembled and separated, the operation is relatively complicated, and the production efficiency is reduced, and in the long-term use process, solder paste, dust or other contaminants may accumulate inside the slot fixing points opened on the PCB steel mesh frame, and it is inconvenient to clean them, which may cause the steel mesh position to shift, affect the accuracy of solder paste printing, and may also fall off and contaminate the PCB board, affecting the function of the circuit. Therefore, the details are as follows: installation grooves are opened all around the surface of the frame body 1, and a limited fixing mechanism 3 is installed inside the installation groove. The limited fixing mechanism 3 is used to limit and fix the steel mesh body 2, and support plates 10 are installed all around the inner wall of the frame body 1, wherein: the support plate 10 is used to support and place the steel mesh body 2.

[0022] The improvement of this embodiment is that:

[0023] By setting a limiting fixing mechanism 3, the traditional method of opening a plurality of slots to install and fix the steel mesh body 2 is eliminated. The steel mesh body 2 can be quickly installed and fixed, and the disassembly is convenient and quick, thereby improving production efficiency. At the same time, it is convenient to directly clean the frame body 1, avoiding the position deviation of the steel mesh caused by the accumulation of solder paste, dust or other contaminants, thereby ensuring the accuracy of solder paste printing.

[0024] First, the limiting and fixing mechanism 3 includes a mounting plate 30, a surface of the mounting plate 30 is provided with a slide groove 301, a support rod 302 is arranged inside the slide groove 301, the lower surface of the support rod 302 is fixedly connected to the limiting plate 303, and a connecting column 304 is installed on the upper surface of the mounting plate 30, wherein: a reset spring 305 is commonly connected between the support rod 302 and the connecting column 304. By setting the slide groove 301 and the support rod 302 and the connecting column 304 connected by the reset spring 305, it is convenient for the support rod 302 to slide inside the slide groove 301. Since the limiting plate 303 is installed at the bottom end of the support rod 302, the support plate 10 is prevented from moving upward and escaping from the slide groove 301.

[0025] Secondly, the limiting and fixing mechanism 3 also includes a fixing plate 31, one end of which is connected to the top of the support rod 302, a limiting groove 310 is opened on the surface of the fixing plate 31, and a stopper 311 is fixedly connected to the upper surface of the fixing plate 31, and the steel mesh body 2 is limited and fixed by the subsequent movement of the fixing plate 31.

[0026] Specifically, a base 306 is installed on the upper surface of the mounting plate 30, and an adjusting rod 307 is fixedly connected to the upper surface of the base 306. The adjusting rod 307 is set as a threaded structure, and an extrusion spring 308 is set on the side of the axis of the adjusting rod 307, wherein: the top end of the extrusion spring 308 is fixedly connected to the lower surface of the fixing plate 31, and the bottom end is fixedly connected to the upper surface of the base 306. By setting the extrusion spring 308 fixedly connected to the lower surface of the fixing plate 31 and the upper surface of the base 306 respectively, it is convenient for the fixing plate 31 to fix the steel mesh body 2 by pressing down through the extrusion spring 308.

[0027] In order to enable the fixing plate 31 to be quickly installed and fixed to the steel mesh body 2, the adjusting rod 307 is arranged inside the limiting groove 310, and the upper end of the outer wall of the adjusting rod 307 is threadedly matched with the sleeve 309, the bottom end of the outer wall of the sleeve 309 is fixedly connected with a push plate 3091, and the top end of the outer wall of the sleeve 309 is fixedly connected with a rotating handle 3092. The adjusting rod 307 is threadedly matched with the sleeve 309, and the rotating handle 3092 is rotated to make the sleeve 309 move downward in a spiral. After moving downward to a certain position, the bottom end of the sleeve 309 is in contact with the upper surface of the fixing plate 31 to limit and fix it.

[0028] Taking into account that during the operation, the support rod 302 may move upward and disengage from the slide groove 301, and the sleeve 309 cannot press the fixed plate 31 downward during the downward movement of the sleeve 309, therefore, the length of the limit plate 303 is greater than the width of the slide groove 301, and the limit plate 303 limits the support rod 302 so that the support rod 302 can only slide in the slide groove 301, and the diameter of the sleeve 309 is greater than the width of the limit groove 310. During the downward movement of the sleeve 309, the bottom end contacts the upper surface of the fixed plate 31 to press it down and limit the steel mesh body 2.

[0029] Taking into account the subsequent disassembly and replacement of the steel mesh body 2, the push plate 3091 is set to an acute triangle structure. During the rotation of the sleeve 309, the end of the push plate 3091 is pressed against the stop block 311, so that the fixed plate 31 is moved backward through the limiting groove 310 opened on its surface while maintaining the same horizontal line with the adjusting rod 307, so as to facilitate the subsequent direct removal and replacement of the steel mesh body 2.

[0030] The utility model is fully compatible with the PCB stencil frame. When in specific use, the user places the stencil body 2 on several support plates 10. After adjusting it to a proper position, through the threaded fit between the adjusting rod 307 and the sleeve 309, rotate the rotating handle 3092 to make the sleeve 309 move downward in a spiral manner. The end of the push plate 3091 is not in contact with the stop block 311. The support rod 302 and the connecting column 304 connected through the return spring 305 make the support rod 302 slide forward inside the chute 301, thereby driving the fixing plate 31 to move forward. After the sleeve 309 moves downward in a spiral manner to a certain position, the bottom end of the sleeve 309 is in contact with the upper surface of the fixing plate 31, and the fixing plate 31 presses down through the compression spring 308 to limit and fix the stencil body 2. On the contrary, when the stencil body 2 needs to be replaced, rotate the rotating handle 3092 in the reverse direction. While the sleeve 309 moves upward in a spiral manner, the end of the push plate 3091 presses against the stop block 311, so that the fixing plate 31 moves backward while keeping the same horizontal line as the adjusting rod 307 through the limiting groove 310 opened on its surface, so that the stencil body 2 is disengaged from the limit fixation of the fixing plate 31, facilitating its removal and replacement.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the utility model, and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A PCB stencil frame with comprehensive compatibility, comprising a frame body (1) and a stencil body (2), the stencil body (2) is arranged inside the frame body (1), and it is characterized in that: The periphery of the surface of the frame body (1) is provided with mounting grooves, and a limit fixing mechanism (3) is installed inside the mounting grooves. The limit fixing mechanism (3) includes a mounting plate (30). A sliding groove (301) is formed on the surface of the mounting plate (30). A support rod (302) is arranged inside the sliding groove (301). A limit plate (303) is fixedly connected to the lower surface of the support rod (302). A connecting column (304) is installed on the upper surface of the mounting plate (30). Among them: A return spring (305) is jointly connected between the support rod (302) and the connecting column (304). The limit fixing mechanism (3) further includes a fixing plate (31). One end of the fixing plate (31) is connected to the top end of the support rod (302). A limit groove (310) is formed on the surface of the fixing plate (31). A stop block (311) is fixedly connected to the upper surface of the fixing plate (31). The limit fixing mechanism (3) is used for limiting and fixing the steel mesh body (2). Support plates (10) are installed on the inner walls around the frame body (1). Among them: The support plates (10) are used for supporting and placing the steel mesh body (2).

2. The fully compatible PCB stencil frame according to claim 1, wherein: A base (306) is installed on the upper surface of the mounting plate (30). An adjusting rod (307) is fixedly connected to the upper surface of the base (306). The adjusting rod (307) is arranged in a threaded structure. An extrusion spring (308) is arranged on the shaft side of the adjusting rod (307). Among them: The top end of the extrusion spring (308) is fixedly connected to the lower surface of the fixing plate (31), and the bottom end is fixedly connected to the upper surface of the base (306).

3. The fully compatible PCB stencil frame according to claim 2, characterized in that: The adjusting rod (307) is arranged inside the limit groove (310). A sleeve (309) is in threaded cooperation with the upper end of the outer wall of the adjusting rod (307). A push plate (3091) is fixedly connected to the bottom end of the outer wall of the sleeve (309). A rotating handle (3092) is fixedly connected to the top end of the outer wall of the sleeve (309).

4. The fully compatible PCB stencil frame according to claim 3, characterized in that: The length of the limit plate (303) is greater than the width of the sliding groove (301), and the diameter of the sleeve (309) is greater than the width of the limit groove (310).

5. The fully compatible PCB stencil frame according to claim 3, wherein: The push plate (3091) is arranged in an acute triangle structure.

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