Pressing plate jig applied to circuit board welding

Abstract

The utility model belongs to the technical field of circuit board production, and particularly relates to a pressing plate jig applied to circuit board welding, which comprises a fixing plate, a screw rod is inserted on the surface of the fixing plate in a sliding manner, an adjusting nut is sleeved on the surface of the upper end of the screw rod in a threaded manner, an elastic mechanism is mounted on the surface of the fixing plate, and the elastic mechanism comprises an elastic sheet. The surface of the lower end of the screw rod is fixedly sleeved with a supporting plate, and the supporting plate is in a circular ring shape. According to the pressing plate jig applied to circuit board welding, the elastic mechanism is arranged on the surface of the fixing plate, and an elastic piece in the elastic mechanism is matched with a thrust spring, so that when the lower end of a screw rod is extruded, the elastic piece and a telescopic rod are jacked upwards by a supporting plate, and the thrust spring is compressed; therefore, the upper end of the thrust spring can be exposed by detaching the cover plate while the circuit board is extruded, and the thrust spring can be easily replaced due to the fact that the thrust spring is not fixed, so that the circuit board is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production, in particular to a pressing plate jig used for circuit board welding. Background Art

[0002] A pressing plate jig for circuit board welding disclosed on a Chinese patent website (application number: 202120473140.6) solves the problem that the existing pressing plate jig generally directly presses the sub-board through a fixed fixing column. Since the fixing column is a fixed structure, the pressure and limit distance of the pressing plate jig on the sub-board cannot be adjusted after the pressing plate jig is installed. The amount of tin brushed on the sub-board fluctuates. When the amount of tin is large, the circuit board is high. Since the limit distance of the pressing plate jig on the sub-board remains unchanged, it is easy for the pressing plate jig to limit the sub-board and squeeze the solder paste on the bottom of the sub-board, making it easy for the sub-board welding to produce undesirable phenomena such as tin short circuits, affecting the product production quality. However, the following problems still exist:

[0003] In actual use, the fixing plate needs to go through a furnace welding process when in use, which causes the use environment to overheat. The overheated environment causes the elastic force of the spring to decrease, which in turn makes it impossible to hold the circuit board tightly, and the spring needs to be replaced frequently. Since the number of springs installed is not only large, but also they are installed by screws, it is extremely time-consuming and labor-intensive to replace the springs, which seriously affects the use efficiency of the fixing plate and makes it inconvenient to use. Utility Model Content

[0004] Based on the existing technical problems, the utility model proposes a pressing plate fixture used for circuit board welding.

[0005] The utility model proposes a pressing plate jig for circuit board welding, comprising a fixed plate, a screw being slidably inserted into the surface of the fixed plate, an adjusting nut being threadedly sleeved on the upper end surface of the screw, an elastic mechanism being installed on the surface of the fixed plate, the elastic mechanism comprising a spring sheet, a supporting plate being fixedly sleeved on the lower end surface of the screw, the supporting plate being in a circular ring shape, the supporting plate and the adjusting nut being respectively located on both sides of the fixed plate, the upper surfaces of two adjacent supporting plates being fixedly connected with spring sheets, the material of the spring sheets being molybdenum alloy.

[0006] Preferably, a slot is provided on the upper surface of the fixing plate, a mounting hole is provided on the inner bottom wall of the slot, and a telescopic rod is slidably inserted into the inner wall of the mounting hole.

[0007] Through the above technical solution, the interior of the slot is communicated with the interior of the mounting hole, thereby facilitating the structure in the mounting hole to be removed outward through the slot.

[0008] Preferably, the lower surface of the telescopic rod is fixedly connected to the upper surface of the elastic sheet, a thrust spring is slidably sleeved on the surface of the telescopic rod, and the lower end surface of the thrust spring is slidably connected to the upper surface of the elastic sheet.

[0009] Through the above technical solution, the push spring is used to push the spring piece, thereby increasing the elastic force of the spring piece and the push plate when they move.

[0010] Preferably, a cover plate is inserted into the inner wall of the slot, and the lower surface of the cover plate is tightly pressed against the upper surface of the telescopic rod.

[0011] Through the above technical solution, the inner wall of the slot is covered with a cover plate, which makes it easier to tighten the upper end of the telescopic rod. The cover plate can be installed by snapping according to the actual specifications of the fixing plate, and bolts can be installed at both ends of the cover plate for fixing.

[0012] Preferably, the lower surfaces of both ends of the fixing plate are fixedly connected to mounting plates, and the upper surfaces of the mounting plates are provided with mounting holes.

[0013] Preferably, a pressing block is fixedly connected to the lower surface of the screw, and a through hole is opened on the upper surface of the fixing plate.

[0014] The beneficial effects of the present invention are:

[0015] An elastic mechanism is installed on the surface of the fixed plate, and the spring in the elastic mechanism cooperates with the thrust spring. When the lower end of the screw is squeezed, the support plate pushes the spring and the telescopic rod upward, and the thrust spring is compressed. While squeezing the circuit board, the upper end of the thrust spring can be exposed by removing the cover plate. Since the thrust spring is not fixed, it can be easily replaced, making it convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a press plate fixture for circuit board welding proposed by the present invention;

[0017] Figure 2 This is a cross-sectional view of the fixed plate structure of a press plate fixture for circuit board welding proposed by the present invention;

[0018] Figure 3 This is a three-dimensional diagram of the spring structure of a pressure plate fixture used for circuit board welding proposed by the utility model.

[0019] In the figure: 1. fixing plate; 11. slot; 2. screw; 3. adjusting nut; 4. spring; 41. support plate; 42. telescopic rod; 43. thrust spring; 44. cover plate; 5. mounting plate; 6. pressing block; 7. through hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-Figure 3 A pressing plate jig for circuit board welding includes a fixed plate 1, a screw 2 is slidably inserted on the surface of the fixed plate 1, an adjusting nut 3 is threadedly sleeved on the upper end surface of the screw 2, an elastic mechanism is installed on the surface of the fixed plate 1, and the elastic mechanism includes a spring 4, a support plate 41 is fixedly sleeved on the lower end surface of the screw 2, and the support plate 41 is annular. The support plate 41 and the adjusting nut 3 are respectively located on both sides of the fixed plate 1, and the upper surfaces of the two adjacent support plates 41 are fixedly connected with springs 4, and the material of the spring 4 is molybdenum alloy.

[0022] The cam 42 is secured to the upper surface of the base 42 by means of a spring 43 which is secured to the base 42 by means of a spring 43 which is secured to the base 42 by means of a spring 43. The cam 42 is secured to the upper surface of the base 42 by means of a spring 43 which is secured to the base 42 by means of a spring 43. The cam 42 is secured to the upper surface of the base 42 by means of a spring 43 which is secured to the base 42 by means of a spring 43.

[0023] By setting an elastic mechanism on the surface of the fixed plate 1, the spring sheet 4 in the elastic mechanism cooperates with the thrust spring 43, so that when the lower end of the screw rod 2 is squeezed, the support plate 41 pushes up the spring sheet 4 and the telescopic rod 42, and compresses the thrust spring 43, thereby squeezing the circuit board at the same time. By removing the cover plate 44, the upper end of the thrust spring 43 can be exposed, and since the thrust spring 43 is not fixed, the thrust spring 43 can be easily replaced, thereby facilitating use.

[0024] The lower surfaces of both ends of the fixing plate 1 are fixedly connected with mounting plates 5, the upper surface of the mounting plate 5 is provided with mounting holes, the lower surface of the screw rod 2 is fixedly connected with a pressing block 6, and the upper surface of the fixing plate 1 is provided with a through hole 7.

[0025] Working principle:

[0026] When in use, the lower end of the pressing block 6 is lifted by the circuit board, and the pressing block 6 lifts one end of the spring 4 through the support plate 41 on the surface of the screw 2. The spring 4 presses the telescopic rod 42 and the thrust spring 43. The thrust spring 43 is compressed. At the same time, the elastic force of the thrust spring 43 and the spring 4 presses the pressing block 6 downward, and the circuit board is pressed tightly.

[0027] When replacing the thrust spring 43 , the cover plate 44 is disassembled, and the thrust spring 43 is directly taken out from the surface of the telescopic rod 42 . After replacement, the cover plate 44 is reinstalled.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A press plate jig for circuit board welding, comprising a fixed plate (1), a screw (2) being slidably inserted into the surface of the fixed plate (1), and an adjusting nut (3) being threadedly sleeved on the upper end surface of the screw (2), characterized in that: An elastic mechanism is installed on the surface of the fixing plate (1), and the elastic mechanism includes a spring piece (4). A support plate (41) is fixedly sleeved on the lower end surface of the screw rod (2), and the support plate (41) is annular. The support plate (41) and the adjusting nut (3) are respectively located on both sides of the fixing plate (1). The upper surfaces of two adjacent support plates (41) are fixedly connected with a spring piece (4), and the material of the spring piece (4) is a molybdenum alloy.

2. A press plate jig for circuit board welding according to claim 1, characterized in that: A slot (11) is provided on the upper surface of the fixing plate (1), a mounting hole is provided on the inner bottom wall of the slot (11), and a telescopic rod (42) is slidably inserted into the inner wall of the mounting hole.

3. The pressing plate jig for circuit board welding according to claim 2, characterized in that: The lower surface of the telescopic rod (42) is fixedly connected to the upper surface of the spring (4); a thrust spring (43) is slidably sleeved on the surface of the telescopic rod (42); and the lower end surface of the thrust spring (43) is slidably connected to the upper surface of the spring (4).

4. The pressing plate jig for circuit board welding according to claim 3, characterized in that: A cover plate (44) is inserted into the inner wall of the slot (11), and the lower surface of the cover plate (44) is tightly pressed against the upper surface of the telescopic rod (42).

5. The pressing plate jig for circuit board welding according to claim 1, characterized in that: The lower surfaces of both ends of the fixing plate (1) are fixedly connected to mounting plates (5), and the upper surface of the mounting plate (5) is provided with mounting holes.

6. The pressing plate jig for circuit board welding according to claim 1, characterized in that: A pressing block (6) is fixedly connected to the lower surface of the screw rod (2), and a through hole (7) is provided on the upper surface of the fixing plate (1).

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