A limiting device for pressing a circuit board

Abstract

This utility model relates to the field of circuit board manufacturing technology, and in particular to a limiting device for circuit board lamination. It includes a worktable, with limiting mechanisms on both sides of the bottom of the worktable for restricting the position of the circuit board. A pressure plate is located above the worktable, and fixed frames are fixed to both sides of the pressure plate. One end of each fixed frame is rotatably connected to a pressure roller, which is positioned directly above the limiting mechanisms. The limiting mechanism includes a movable plate, with guide rods sleeved at both ends. The guide rods are fixed to the bottom of the worktable, and a return spring is sleeved on the outer wall of the guide rods, positioned between the movable plate and the worktable. A pressure rod is connected to the movable plate, with one end of the pressure rod bent towards the worktable. This limiting device for circuit board lamination can automatically limit the position of the circuit board before lamination. It has the advantages of simple structure, good limiting effect, and high degree of automation, and is particularly suitable for automated production lines.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing technology, specifically to a limiting device for circuit board pressing. Background Technology

[0002] As a core component of electronic devices, the precision of the manufacturing process of printed circuit boards (PCBs) directly affects the performance and reliability of electronic products. The lamination process is a crucial step in PCB production, primarily used to bond multilayer substrates, copper foil, and prepreg (PP sheets) into a single unit under high temperature and pressure, forming a multilayer PCB. Precise control of the relative positions of each layer during lamination is a core requirement for ensuring the electrical performance of the PCB. Excessive misalignment between layers can lead to short circuits, open circuits, or abnormal signal transmission, even rendering the entire PCB unusable. Therefore, the lamination process requires limiting devices to fix and constrain the positions of each layer to ensure lamination accuracy. Traditional limiting devices require independent power sources, resulting in complex structures, high costs, and poor coordination with the pressure plate, leading to issues such as response lag and synchronization errors. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a limiting device for circuit board pressing, which solves the technical problem that existing limiting devices are unable to quickly achieve automatic limiting of circuit boards.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a limiting device for pressing circuit boards, including a worktable, with limiting mechanisms for limiting the position of the circuit board provided on both sides of the bottom of the worktable, a pressure plate provided above the worktable, and fixed frames fixed on both sides of the pressure plate, with a pressure roller rotatably connected to one end of the fixed frame, and the pressure roller being directly above the limiting mechanism;

[0005] The limiting mechanism includes a movable plate, with guide rods sleeved at both ends of the movable plate. The guide rods are fixed to the bottom of the worktable. A return spring is sleeved on the outer wall of the guide rod between the movable plate and the worktable. A pressure rod is connected to the movable plate. One end of the pressure rod is bent toward the worktable. Two fixed units located on the surface of the worktable are slidably arranged on the movable plate.

[0006] Preferably, the fixing unit includes a cylindrical slider, which is slidably disposed in a sliding hole opened in the movable plate. A square slider is fixed on the cylindrical slider, which is slidably disposed in a guide hole opened in the worktable. An "L"-shaped clamping block is detachably installed on the cylindrical slider.

[0007] Preferably, the cylindrical slider has a positioning groove, the bottom surface of the positioning groove has a threaded hole, the clamping block has an insertion hole, and a screw that is threadedly connected to the threaded hole is inserted into the insertion hole.

[0008] Preferably, the surface of the clamping block is flush with the surface of the circuit board.

[0009] Preferably, the bottom of the movable plate is provided with an adjusting bolt that can adjust the horizontal position of the pressure rod.

[0010] Preferably, both sides of the workbench have notches corresponding to the positions of the pressure rods.

[0011] By means of the above technical solution, this utility model provides a limiting device for circuit board pressing, which has at least the following beneficial effects:

[0012] 1. This circuit board pressing limiting device uses limiting mechanisms on both sides of the worktable. When the pressing plate on the pressing equipment presses the circuit board, the pressure rollers on both sides of the pressing plate drive the limiting mechanism to move and automatically fit and clamp the circuit board at the four corners, thus achieving automatic limiting of the circuit board before pressing. This limiting device has the advantages of simple structure, good limiting effect and high degree of automation, and is especially suitable for automated production lines.

[0013] 2. The circuit board pressing limit device can adjust the position of the pressure rod by setting an adjusting bolt at the bottom of the movable plate, thereby changing the initial contact position between the pressure roller and the pressure rod. This allows the clamping position of the clamping block on the limit mechanism to be adjusted according to the size of the circuit board to meet the needs of circuit boards of different sizes.

[0014] 3. The limiting device for pressing the circuit board makes the surface of the clamping block flush with the surface of the circuit board. When the pressing plate is pressing the circuit board, after pressing is completed, the bottom of the pressing plate contacts the clamping block, thereby limiting the pressing plate from continuing to press the circuit board and avoiding the problem of excessive pressure on the pressing plate causing damage to the circuit board. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention when in use as a whole;

[0017] Figure 2 This is a schematic diagram of the structure of the bottom of the workbench of this utility model;

[0018] Figure 3 This is a front view of the entire utility model in use;

[0019] Figure 4 This is a schematic diagram of the limiting mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the fixing unit of this utility model.

[0021] Figure label:

[0022] 1. Workbench; 101. Notch; 102. Guide hole; 2. Limiting mechanism; 201. Movable plate; 202. Guide rod; 203. Return spring; 204. Pressure rod; 205. Adjusting bolt; 206. Fixing unit; 2061. Cylindrical slider; 2062. Square slider; 2063. Clamping block; 2064. Screw; 3. Pressure plate; 4. Fixing frame; 5. Pressure roller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] A circuit board, also known as a printed circuit board, is one of the most important basic components in electronic devices. It is mainly used to support electronic components, provide electrical connections, and realize signal transmission and power distribution.

[0025] Due to the inherent limitations of existing technologies in quickly achieving automatic limit positioning of circuit boards, please refer to... Figures 1-5 This embodiment provides a limiting device for circuit board lamination, which can automatically limit the circuit board before lamination. It has the advantages of simple structure, good limiting effect and high degree of automation. The device includes a workbench 1. Limiting mechanisms 2 for limiting the position of the circuit board are provided on both sides of the bottom of the workbench 1. A pressure plate 3 is provided on the top of the workbench 1. Fixing frames 4 are fixed on both sides of the surface of the pressure plate 3. One end of the fixing frame 4 is rotatably connected to a pressure roller 5. The pressure roller 5 is located directly above the limiting mechanism 2. In use, the multilayer circuit board is placed on the workbench 1 in sequence, and then the lamination equipment is started. The pressure plate 3 moves down and the lamination process is carried out. During the downward movement of the pressure plate 3, the pressure rollers 5 on both sides of the pressure plate 3 drive the limiting mechanism 2 to move and automatically fit and clamp the four corners of the circuit board, so as to realize the automatic limiting of the circuit board before lamination.

[0026] Traditional limit devices require an independent power source, resulting in complex structures, high costs, and poor coordination with the action of pressure plate 3. Issues such as response lag and synchronization errors exist. For solutions to these problems, please refer to... Figure 4The limiting mechanism 2 includes a movable plate 201, with guide rods 202 sleeved at both ends of the movable plate 201. The guide rods 202 are fixed to the bottom of the worktable 1. A return spring 203 is sleeved on the outer wall of the guide rods 202, located between the movable plate 201 and the worktable 1. A pressure rod 204 is connected to the movable plate 201, with one end of the pressure rod 204 bent toward the worktable 1. Two fixing units 206 are slidably disposed on the movable plate 201 on the surface of the worktable 1. Further, the fixing unit 206 includes a cylindrical slider 2061, which is slidably disposed in a sliding hole opened in the movable plate 201. A square slider is fixed on the cylindrical slider 2061. 2062, a square slider 2062 is slidably set in the guide hole 102 opened on the worktable 1, and an "L"-shaped clamping block 2063 is detachably installed on the cylindrical slider 2061; during the downward movement of the pressure plate 3, the pressure rollers 5 on both sides of the pressure plate 3 will squeeze the pressure rod 204 and force the pressure rod 204 to move. The pressure rod 204 drives the movable plate 201 to move. Under the action of the sliding hole and the guide hole 102, the movable plate 201 can drive the fixed unit 206 to move and contact the four corners of the circuit board, thereby realizing the clamping and limiting of the circuit board. The "L"-shaped clamping block 2063 simultaneously fits against the two adjacent sides of the circuit board to form a stable rectangular constraint. Compared with the traditional single-sided limiting, the positioning accuracy is better.

[0027] Furthermore, a positioning groove is provided on the cylindrical slider 2061, and a threaded hole is provided on the bottom surface of the positioning groove. An insertion hole is provided on the clamping block 2063, and a screw 2064 that is threadedly connected to the threaded hole is inserted into the insertion hole. Since the clamping block 2063 is installed on the cylindrical slider 2061 by the screw 2064, the clamping block 2063 of the corresponding height can be installed according to the number of layers of the circuit board, and the positioning groove can ensure that the clamping block 2063 can be installed accurately.

[0028] When the pressure plate 3 is pressing the circuit board, it is easy to cause damage to the circuit board due to excessive pressure. To address this issue, the surface of the clamping block 2063 is flush with the surface of the circuit board. After pressing is completed, the bottom of the pressure plate 3 contacts the clamping block 2063, thereby limiting the pressure plate 3 from continuing to press the circuit board and avoiding damage to the circuit board due to excessive pressure.

[0029] Traditional limiting mechanisms 2 are designed for circuit boards of fixed sizes, which limits their application range. To address this issue, an adjusting bolt 205 is provided at the bottom of the movable plate 201 to adjust the horizontal position of the pressure rod 204. By setting the adjusting bolt 205 at the bottom of the movable plate 201, the position of the pressure rod 204 can be adjusted, thereby changing the initial contact position between the pressure roller 5 and the pressure rod 204. Figure 1Taking the right-side limiting mechanism 2 as an example, when the pressure rod 204 is moved to the left, the contact position between the pressure roller 5 and the pressure rod 204 will shift to the right, thus reducing the distance the pressure roller 5 squeezes the pressure rod 204 and consequently reducing the distance the fixing unit 206 moves. This allows for limiting larger circuit boards. Conversely, when the pressure rod 204 is moved to the right, the contact position between the pressure roller 5 and the pressure rod 204 will shift to the left, thus increasing the distance the pressure roller 5 squeezes the pressure rod 204 and consequently increasing the distance the fixing unit 206 moves. This allows for limiting smaller circuit boards. The clamping position of the clamping block 2063 on the limiting mechanism 2 can be adjusted according to the size of the circuit board to meet the needs of different sized circuit boards.

[0030] Traditional worktable 1 lacks a clearance structure, and the pressure rod 204 is prone to interference with the edge of worktable 1 when it moves, causing the limiting mechanism 2 to jam or move poorly. To address this issue, notches 101 corresponding to the positions of the pressure rod 204 are provided on both sides of worktable 1. The notches 101 provide movement space for the pressure rod 204, ensuring that the movable plate 201 can slide freely under the drive of the pressure plate 3, avoiding limiting failure caused by mechanical interference. In addition, the notch 101 design allows the limiting mechanism 2 to be hidden at the bottom of worktable 1, reducing the space occupied by the equipment and adapting to the layout of compact pressing equipment.

[0031] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A limiting device for circuit board pressing, comprising a worktable (1), characterized in that: The bottom of the workbench (1) is provided with limiting mechanisms (2) on both sides for limiting the position of the circuit board. A pressure plate (3) is provided above the workbench (1). Fixing frames (4) are fixed on both sides of the pressure plate (3). A pressure wheel (5) is rotatably connected to one end of the fixing frame (4). The pressure wheel (5) is located directly above the limiting mechanism (2). The limiting mechanism (2) includes a movable plate (201), both ends of which are fitted with guide rods (202). The guide rods (202) are fixed to the bottom of the worktable (1). A return spring (203) between the movable plate (201) and the worktable (1) is fitted on the outer wall of the guide rods (202). A pressure rod (204) is connected to the movable plate (201). One end of the pressure rod (204) is bent toward the worktable (1). Two fixing units (206) located on the surface of the worktable (1) are slidably arranged on the movable plate (201).

2. The limiting device for circuit board pressing according to claim 1, characterized in that: The fixed unit (206) includes a cylindrical slider (2061), which is slidably disposed in a sliding hole opened on the movable plate (201). A square slider (2062) is fixed on the cylindrical slider (2061), which is slidably disposed in a guide hole (102) opened on the worktable (1). An "L"-shaped clamp (2063) is detachably installed on the cylindrical slider (2061).

3. The limiting device for circuit board pressing according to claim 2, characterized in that: The cylindrical slider (2061) has a positioning groove, the bottom surface of the positioning groove has a threaded hole, the clamp (2063) has an insertion hole, and a screw (2064) that is threadedly connected to the threaded hole is inserted into the insertion hole.

4. The limiting device for circuit board pressing according to claim 2, characterized in that: The surface of the clamp (2063) is flush with the surface of the circuit board.

5. The limiting device for circuit board pressing according to claim 1, characterized in that: The bottom of the movable plate (201) is provided with an adjusting bolt (205) that can adjust the horizontal position of the pressure rod (204).

6. The limiting device for circuit board pressing according to claim 1, characterized in that: Both sides of the workbench (1) are provided with notches (101) corresponding to the positions of the pressure rod (204).

Images