Compressing and fixing device of circuit board

Abstract

The utility model discloses a compressing and fixing device for a circuit board, which relates to the technical field of compressing and fixing and comprises a workbench, two supporting frames are fixedly mounted at the bottom of the workbench, a threaded rod is in threaded connection with the interior of the supporting frame on one side, a polygonal rod is fixedly mounted at one end, far away from a crank, of the threaded rod, and the polygonal rod is in threaded connection with the supporting frame on the other side. According to the pressing and fixing device for the circuit board, the four sliding inner rods move in a pairwise opposite mode, then adjustment can be conveniently conducted according to the length of the circuit board, and the pressing and fixing device for the circuit board has the advantages of being simple in structure, convenient to use and high in practicability. The sliding inner rods can slide in the moving frame by pulling the sliding inner rods, so that the four sliding inner rods can be conveniently adjusted according to the width of the circuit board, the size and the shape of the circuit board, the circuit boards in different shapes can be conveniently fixed, and the application range of the device is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of compression and fixing, in particular to a compression and fixing device for a circuit board. Background Art

[0002] The names of circuit boards include: ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, circuit boards, PCB boards, aluminum substrates, high-frequency boards, thick copper boards, impedance boards, PCBs, ultra-thin circuit boards, ultra-thin circuit boards, printed (copper etching technology) circuit boards, etc. Circuit boards miniaturize and visualize circuits, and play an important role in the mass production of fixed circuits and the optimization of electrical appliance layouts.

[0003] After searching, the existing Chinese patent announcement number is: CN 220254778 U, which provides a clamping and fixing device for a circuit board. This patent can protect the clamped part of the circuit board through the use of a protective component, and try to avoid damage to the circuit board during the clamping process. At the same time, the use of the protective component and the lifting device can make the clamping effect of the circuit board better, so as to avoid displacement of the circuit board during subsequent processing and affect the processing effect of the circuit board.

[0004] Although the above patent can protect the pressed parts and avoid the circuit board from being damaged during the pressing process, the above circuit board pressing and fixing device still has the following problems: it cannot be pressed well according to the size and shape of the circuit board, which results in a low range of use of the device.

[0005] In view of the above problems, a circuit board pressing and fixing device is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a pressing and fixing device for a circuit board, which can solve the problems of the background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamping and fixing device for a circuit board, comprising a workbench, two supporting frames fixedly installed on the bottom of the workbench, a threaded rod is connected to the internal thread of the supporting frame on one side, a polygonal rod is fixedly installed on the end of the threaded rod away from the crank, a rotating shaft is slidably sleeved on the surface of the polygonal rod, the end of the rotating shaft away from the threaded rod is rotatably connected to the other supporting frame, a gear is fixedly sleeved on the surface of the rotating shaft, a rack is meshingly connected on the surface of the gear, a lifting frame is fixedly installed on the rack, two fixed rods are fixedly installed inside the lifting frame, and two movable frames are slidably connected to the two fixed rods.

[0008] Preferably, a crank is fixedly mounted on one end of the threaded rod.

[0009] Preferably, four limiting guide rods are fixedly installed on the bottom of the workbench, and the lifting frame is slidably connected on the surfaces of the four limiting guide rods.

[0010] Preferably, the lower ends of the four limiting guide rods are all fixedly mounted with limiting baffles.

[0011] Preferably, two sliding inner rods are slidably connected inside the two moving frames, and extrusion rods are slidably connected inside the four sliding inner rods, and rubber extrusion discs are fixedly installed at the bottoms of the four extrusion rods.

[0012] Preferably, tension springs are movably sleeved on the surfaces of the four extrusion rods, the lower ends of the four tension springs are respectively fixedly connected to the four sliding inner rods, and the upper ends of the four tension springs are respectively fixedly connected to the four extrusion rods.

[0013] Preferably, the lifting frame is internally rotatably connected with a bidirectional threaded rod.

[0014] Preferably, the threads on the surface of the bidirectional threaded rod are arranged oppositely, and the opposite threads on the surface of the bidirectional threaded rod are respectively threadedly connected to the two moving frames.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The circuit board clamping and fixing device enables the four sliding inner rods to move back to each other in pairs, thereby facilitating adjustment according to the length of the circuit board. Pulling the sliding inner rods can make the sliding inner rods slide inside the movable frame, thereby facilitating the four sliding inner rods to be adjusted according to the width of the circuit board, and facilitating adjustment according to the size and shape of the circuit board, thereby facilitating fixing circuit boards of different shapes, thereby expanding the use range of the device.

[0017] (2) The clamping and fixing device of the circuit board has a self-locking property because the threaded rod is easy to fix the lowering distance of the movable frame, which makes it easy to fix the circuit board later and improves the convenience of fixing the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic structural diagram of a circuit board pressing and fixing device of the utility model;

[0020] Figure 2 For this utility model Figure 1 The enlarged schematic diagram at A in the middle;

[0021] Figure 3 This is a bottom schematic diagram of the workbench of the utility model;

[0022] Figure 4 For this utility model Figure 3 Enlarged schematic diagram of point B in the middle.

[0023] Figure numerals: 1. workbench; 2. threaded rod; 3. movable frame; 4. fixed rod; 5. lifting frame; 6. limiting guide rod; 7. limit baffle; 8. rotating shaft; 9. polygonal rod; 10. sliding inner rod; 11. extrusion rod; 12. rubber extrusion disk; 13. tension spring; 14. bidirectional threaded rod; 15. crank; 16. support frame; 17. gear; 18. rack. DETAILED DESCRIPTION

[0024] 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.

[0025] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0026] See also Figure 1-4 The utility model provides a technical solution: a clamping and fixing device for a circuit board, comprising a workbench 1, two supporting frames 16 are fixedly installed at the bottom of the workbench 1, a threaded rod 2 is connected to the inner thread of the supporting frame 16 on one side, a crank 15 is fixedly installed at one end of the threaded rod 2, a polygonal rod 9 is fixedly installed at the end of the threaded rod 2 away from the crank 15, a rotating shaft 8 is slidably sleeved on the surface of the polygonal rod 9, the end of the rotating shaft 8 away from the threaded rod 2 is rotatably connected to another supporting frame 16, a gear 17 is fixedly sleeved on the surface of the rotating shaft 8, a rack 18 is meshingly connected on the surface of the gear 17, a lifting frame 5 is fixedly installed on the rack 18, two fixed rods 4 are fixedly installed inside the lifting frame 5, and two moving frames 3 are slidably connected to the two fixed rods 4.

[0027] Turning the crank 15 causes the threaded rod 2 to move inside the support frame 16, and drives the polygonal rod 9 to rotate, thereby rotating the rotating shaft 8, and then driving the gear 17 to rotate, so that the rack 18 moves downward, and the lifting frame 5 moves downward, and then the two mobile frames 3 move downward. Since the threaded rod 2 has a self-locking property, it is convenient to fix the descending distance of the mobile frame 3, which is convenient for fixing the circuit board in the later stage, thereby improving the convenience of fixing the circuit board.

[0028] Four limiting guide rods 6 are fixedly installed at the bottom of the workbench 1, and the lifting frame 5 is slidably connected on the surfaces of the four limiting guide rods 6. The lower ends of the four limiting guide rods 6 are fixedly installed with limiting baffles 7.

[0029] When the lifting frame 5 moves, it will slide on the surfaces of the four limiting guide rods 6, thereby facilitating the limiting of the lifting frame 5, preventing the gear 17 and the rack 18 from being disengaged, and ensuring the stable operation of the device.

[0030] Two sliding inner rods 10 are slidably connected inside the two moving frames 3, and extrusion rods 11 are slidably connected inside the four sliding inner rods 10. Rubber extrusion disks 12 are fixedly installed at the bottoms of the four extrusion rods 11. Tension springs 13 are movably sleeved on the surfaces of the four extrusion rods 11. The lower ends of the four tension springs 13 are respectively fixedly connected to the four sliding inner rods 10, and the upper ends of the four tension springs 13 are respectively fixedly connected to the four extrusion rods 11.

[0031] When the two moving frames 3 move downward, the four sliding inner rods 10 will move downward, and the four rubber extrusion disks 12 will contact the circuit board, and the circuit board will be squeezed by the four rubber extrusion disks 12, so that the extrusion rod 11 will slide inside the sliding inner rod 10, stretching the tension spring 13, thereby facilitating buffering, preventing excessive squeezing of the circuit board, and improving the effect of fixing the circuit board.

[0032] A bidirectional threaded rod 14 is rotatably connected inside the lifting frame 5 . The threads on the surface of the bidirectional threaded rod 14 are arranged oppositely. The opposite threads on the surface of the bidirectional threaded rod 14 are threadedly connected to the two moving frames 3 respectively.

[0033] By rotating the bidirectional threaded rod 14, the two mobile frames 3 can move relative to each other or move away from each other, and at the same time, the four sliding inner rods 10 can move away from each other in pairs, so as to facilitate adjustment according to the length of the circuit board. Pulling the sliding inner rod 10 can make the sliding inner rod 10 slide inside the mobile frame 3, so as to facilitate adjustment of the four sliding inner rods 10 according to the width of the circuit board, and to facilitate adjustment according to the size and shape of the circuit board, so as to facilitate fixing of circuit boards of different shapes, thereby expanding the scope of use of the device.

[0034] Working principle:

[0035] Turning the crank 15 causes the threaded rod 2 to move inside the support frame 16, and drives the polygonal rod 9 to rotate, thereby rotating the rotating shaft 8, and then driving the gear 17 to rotate, so that the rack 18 moves downward, and the lifting frame 5 moves downward, and then the two mobile frames 3 move downward. Since the threaded rod 2 has a self-locking property, it is convenient to fix the descending distance of the mobile frame 3.

[0036] When the two moving frames 3 move downward, the four sliding inner rods 10 will move downward, and the four rubber extrusion disks 12 will contact the circuit board, and the circuit board will be squeezed by the four rubber extrusion disks 12, so that the extrusion rod 11 will slide inside the sliding inner rod 10, stretching the tension spring 13, thereby facilitating buffering.

[0037] By rotating the bidirectional threaded rod 14, the two mobile frames 3 can move relative to each other or move away from each other, and at the same time, the four sliding inner rods 10 can move away from each other in pairs, thereby facilitating adjustment according to the length of the circuit board. Pulling the sliding inner rod 10 can make the sliding inner rod 10 slide inside the mobile frame 3, thereby facilitating adjustment of the four sliding inner rods 10 according to the width of the circuit board.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit board pressing and fixing device, comprising a workbench (1), characterized in that: Two support frames (16) are fixedly installed at the bottom of the workbench (1), a threaded rod (2) is connected to the inner thread of one support frame (16), a polygonal rod (9) is fixedly installed at one end of the threaded rod (2) away from the crank (15), a rotating shaft (8) is slidably sleeved on the surface of the polygonal rod (9), the end of the rotating shaft (8) away from the threaded rod (2) is rotatably connected to the other support frame (16), a gear (17) is fixedly sleeved on the surface of the rotating shaft (8), a rack (18) is meshingly connected on the surface of the gear (17), a lifting frame (5) is fixedly installed on the rack (18), two fixed rods (4) are fixedly installed inside the lifting frame (5), and two moving frames (3) are slidably connected to the two fixed rods (4).

2. A circuit board pressing and fixing device according to claim 1, characterized in that: A crank (15) is fixedly mounted on one end of the threaded rod (2).

3. A circuit board pressing and fixing device according to claim 2, characterized in that: Four limiting guide rods (6) are fixedly installed at the bottom of the workbench (1), and the lifting frame (5) is slidably connected on the surfaces of the four limiting guide rods (6).

4. A circuit board pressing and fixing device according to claim 3, characterized in that: The lower ends of the four limiting guide rods (6) are all fixedly mounted with limiting baffles (7).

5. A circuit board pressing and fixing device according to claim 4, characterized in that: Two sliding inner rods (10) are slidably connected inside the two moving frames (3), and extrusion rods (11) are slidably connected inside the four sliding inner rods (10). Rubber extrusion discs (12) are fixedly installed at the bottoms of the four extrusion rods (11).

6. A circuit board pressing and fixing device according to claim 5, characterized in that: Tension springs (13) are movably sleeved on the surfaces of the four extrusion rods (11); the lower ends of the four tension springs (13) are respectively fixedly connected to the four sliding inner rods (10); and the upper ends of the four tension springs (13) are respectively fixedly connected to the four extrusion rods (11).

7. A circuit board pressing and fixing device according to claim 6, characterized in that: A bidirectional threaded rod (14) is rotatably connected inside the lifting frame (5).

8. A circuit board pressing and fixing device according to claim 7, characterized in that: The threads on the surface of the bidirectional threaded rod (14) are arranged in opposite directions, and the opposite threads on the surface of the bidirectional threaded rod (14) are respectively threadedly connected to the two moving frames (3).

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