Circuit board capable of preventing vibration desoldering

Abstract

The utility model discloses a circuit board capable of preventing vibration desoldering, which belongs to the technical field of circuit boards and comprises a circuit board main body and an anti-vibration board fixed at the bottom end of the circuit board main body, and a plurality of metal connecting parts are fixed on the circuit board main body. A positioning rod clamped with the metal connecting part is fixed to the top end of the anti-vibration plate, a bearing rod tightly connected with the bottom end of the circuit board body is detachably fixed to the anti-vibration plate, and elastic plates abutting against the top end of the circuit board body are fixed to the two sides of the top end face of the positioning rod; the circuit board comprises a circuit board main body, large part welding parts are arranged on the two sides of the top end face of the circuit board main body, a small part welding part is arranged in the center of the circuit board main body, and conductive parts are arranged at the two ends of the circuit board main body at equal intervals. And the stability and the anti-vibration sealing-off effect of the circuit board are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit boards, and particularly relates to a circuit board for preventing vibration and desoldering. Background Technique

[0002] The names of circuit boards include: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum substrate, high-frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board, printed circuit board, etc. The circuit board miniaturizes and visualizes the circuit, and plays an important role in the mass production of fixed circuits and the optimization of the layout of electrical appliances.

[0003] During the transportation, use or testing of electronic devices, especially in a vibrating environment, welding desoldering will occur. Welding desoldering means that when the circuit board is subjected to vibration, the originally firmly welded solder joints or the component legs and the pads are separated, resulting in the interruption or instability of the circuit connection.

[0004] The patent with the application number 202022828822.2 discloses a high-frequency multi-layer circuit board, which includes a multi-layer circuit board main body. Buffer sliding columns are fixedly arranged at both ends of the four sides of the multi-layer circuit board main body. One ends of the eight buffer sliding columns are respectively slidably connected to one side of the buffer sliding grooves opened on the inner walls of the four sides of the protective outer frame. A plurality of heat-conducting thin sheets are fixedly arranged at the centers of both sides of the multi-layer circuit board main body. One ends of both sides of the protective outer frame are respectively hinged with snap-fit frames. The main reasons for the vibration desoldering of the circuit board mainly include: poor matching between components and pads, mismatching of the size and shape between component legs and pads, or problems such as oxidation and impurities, resulting in insufficient welding strength. Working or using in a vibrating environment for a long time causes the solder joints to be subjected to periodic stress and gradually produce fatigue failure. The material problems of the solder, components or the circuit board itself, such as poor solder quality, easy breakage of component pins, insufficient strength of the circuit board substrate, etc., will all affect the welding stability.

[0005] The above technical solution is designed as a multi-layer circuit board. By stacking multiple conductive layers and insulating layers, the multi-layer circuit board not only increases the wiring density but also provides more mechanical support. However, the design of parts such as buffer springs will cause the vibration of the circuit board to intensify, resulting in vibration desoldering of the circuit board. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a circuit board for preventing vibration and desoldering. The circuit board for preventing vibration and desoldering aims to solve the technical problem that the design of parts such as buffer springs in the prior art will cause the vibration of the circuit board to intensify, resulting in vibration desoldering of the circuit board.

[0008] (2) Technical Solution

[0009] In order to solve the above technical problems, the present utility model provides such a circuit board for preventing vibration and desoldering. The circuit board for preventing vibration and desoldering includes a circuit board main body and a vibration-proof plate fixed to the bottom end of the circuit board main body. A plurality of metal connection parts are fixed on the circuit board main body. A positioning rod that is clamped with the metal connection part is fixed to the top end of the vibration-proof plate, and a load-bearing rod that is detachably fixed and tightly connected to the bottom end of the circuit board main body is fixed on the vibration-proof plate. Elastic plates that abut against the top end of the circuit board main body are fixed to both sides of the top end surface of the positioning rod.

[0010] Preferably, large component soldering parts are arranged on both sides of the top end surface of the circuit board main body, and small component soldering parts are arranged at the central position of the circuit board main body.

[0011] Furthermore, conductive parts are equidistantly arranged at both ends of the circuit board main body, and the conductive parts are respectively connected to the small component soldering parts and the large component soldering parts.

[0012] Even further, mounting holes are symmetrically opened at both ends of the vibration-proof plate, and a plurality of screw holes are arranged in a rectangular array on the vibration-proof plate.

[0013] Even further, a rubber positioning plate is fixed to the top end of the load-bearing rod, and a screw rod that is threadedly inserted into the screw hole is fixed to the bottom end of the load-bearing rod.

[0014] Even further, a through hole is opened at the central position of the metal connection part, and the positioning rod is snugly inserted into the through hole.

[0015] Even further, a deformation groove is arranged between the two elastic plates, and convex portions are fixed to the top ends of the side walls of the two elastic plates. An arc groove is opened at the top end of the convex portion, and the bottom end of the convex portion is tightly connected to the circuit board main body.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the present utility model, a vibration-proof plate is arranged at the bottom end of the circuit board main body. When the vibration-proof plate is connected to the circuit board main body, the positioning rod at the top end of the vibration-proof plate passes through the through hole of the metal connection part, and the arc groove abuts against the inner wall of the through hole, so that the elastic plate contracts into the deformation groove until the bottom end of the convex portion abuts against the circuit board main body after the positioning rod passes through the through hole. At the same time, the rubber positioning plate on the load-bearing rod at the top end of the vibration-proof plate is tightly connected to the bottom end of the circuit board main body. The two ends of the circuit board main body are positioned by the load-bearing rod and the convex portion, thereby greatly reducing the vibration of the circuit board and improving the stability of the circuit board and the effect of preventing vibration and desoldering;

[0019] By providing a plurality of screw holes at the top end of the anti-vibration plate, the screw at the bottom end of the load-bearing rod is threadedly inserted into the screw holes to maintain fixation. After unscrewing the load-bearing rod, it can be inserted into the screw holes at different positions to facilitate the adjustment of its position. At the same time, large-component welding parts are provided at both ends of the circuit board main body, and the arrangement of the large-component welding parts at both ends of the circuit board main body reduces the occurrence of vibration. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the anti-vibration plate in the present utility model;

[0023] Figure 3 For the present utility model Figure 2 is an enlarged schematic diagram of the structure at A in the present utility model;

[0024] Figure 4 is a structural schematic diagram of the positioning rod in the present utility model.

[0025] The reference numerals in the drawings are: 1, circuit board main body; 2, anti-vibration plate; 3, small-component welding part; 4, through hole; 5, conductive part; 6, metal connection part; 7, large-component welding part; 8, positioning rod; 9, screw hole; 10, mounting hole; 11, load-bearing rod; 12, rubber positioning plate; 13, screw; 14, arc-shaped groove; 15, elastic plate; 16, protrusion; 17, deformation groove. Detailed Embodiment

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts shall fall within the protection scope of the present utility model.

[0027] This detailed embodiment is a circuit board for preventing vibration and desoldering, and its structural schematic diagram is as shown in Figure 1 and Figure 4As shown, the circuit board for preventing vibration and desoldering includes a circuit board main body 1 and a vibration-proof plate 2 fixed to the bottom end of the circuit board main body 1. A plurality of metal connection parts 6 are fixed on the circuit board main body 1. A positioning rod 8 that is clamped with the metal connection part 6 is fixed to the top end of the vibration-proof plate 2. And a load-bearing rod 11 that is detachably fixed to the bottom end of the circuit board main body 1 and is tightly connected to the bottom end of the circuit board main body 1 is fixed to the vibration-proof plate 2. Elastic plates 15 that abut against the top end of the circuit board main body 1 are fixed to both sides of the top end surface of the positioning rod 8. When the vibration-proof plate 2 is connected to the circuit board main body 1, the positioning rod 8 at the top end of the vibration-proof plate 2 passes through the through hole 4 of the metal connection part 6, and the arc-shaped groove 14 abuts against the inner wall of the through hole 4, so that the elastic plate 15 contracts into the deformation groove 17 until the bottom end of the protrusion 16 abuts against the circuit board main body 1 after the positioning rod 8 passes through the through hole 4. At the same time, the rubber positioning plate 12 on the load-bearing rod 11 at the top end of the vibration-proof plate 2 is tightly connected to the bottom end of the circuit board main body 1. The two ends of the circuit board main body 1 are positioned by the load-bearing rod 11 and the protrusion 16, thus greatly reducing the vibration of the circuit board.

[0028] As Figure 2 and Figure 3 shown, large component welding parts 7 are arranged on both sides of the top end surface of the circuit board main body 1, and a small component welding part 3 is arranged at the center position of the circuit board main body 1. The arrangement of the large component welding parts 7 at both ends of the circuit board main body 1 reduces the occurrence of vibration. Conductive parts 5 are equidistantly arranged at both ends of the circuit board main body 1, and the conductive parts 5 are respectively connected to the small component welding part 3 and the large component welding part 7. Installation holes 10 are symmetrically opened at both ends of the vibration-proof plate 2, and a plurality of screw holes 9 are arranged in a rectangular array on the vibration-proof plate 2. A rubber positioning plate 12 is fixed to the top end of the load-bearing rod 11, and a screw rod 13 that is threadedly inserted into the screw hole 9 is fixed to the bottom end of the load-bearing rod 11. A through hole 4 is opened at the center position of the metal connection part 6, and the positioning rod 8 is fitted and inserted into the through hole 4. A deformation groove 17 is arranged between the two elastic plates 15, and protrusions 16 are fixed to the top ends of the side walls of the two elastic plates 15. An arc-shaped groove 14 is opened at the top end of the protrusion 16, and the bottom end of the protrusion 16 is tightly connected to the circuit board main body 1. The screw rod 13 at the bottom end of the load-bearing rod 11 is threadedly inserted into the screw hole 9 to keep it fixed. After unscrewing the load-bearing rod 11, it is inserted into the screw holes 9 at different positions to facilitate the adjustment of its position.

[0029] Working principle: When using the device of this technical solution, the anti-vibration plate 2 is connected to the circuit board main body 1. The positioning rod 8 at the top of the anti-vibration plate 2 passes through the through hole 4 of the metal connecting part 6, and the arc-shaped groove 14 abuts against the inner wall of the through hole 4, so that the elastic plate 15 shrinks into the deformation groove 17 until the bottom end of the convex part 16 abuts against the circuit board main body 1 after the positioning rod 8 passes through the through hole 4. At the same time, the rubber positioning plate 12 on the load-bearing rod 11 at the top of the anti-vibration plate 2 is tightly connected to the bottom end of the circuit board main body 1. The load-bearing rod 11 and the convex part 16 position both ends of the circuit board main body 1, thus greatly reducing the vibration of the circuit board. The screw 13 at the bottom end of the load-bearing rod 11 is threadedly inserted into the screw hole 9 to keep it fixed. After unscrewing the load-bearing rod 11, it is inserted into the screw holes 9 at different positions to facilitate the adjustment of its position. At the same time, large component welding parts 7 are provided at both ends of the circuit board main body 1. The large component welding parts 7 provided at both ends of the circuit board main body 1 reduce the occurrence of vibration.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit board for preventing vibration-induced desoldering, the circuit board for preventing vibration-induced desoldering comprising a circuit board body (1) and a vibration-proof plate (2) fixed to the bottom end of the circuit board body (1), characterized in that, A plurality of metal connection parts (6) are fixed on the circuit board main body (1). A positioning rod (8) which is clamped with the metal connection part (6) is fixed at the top end of the vibration-proof plate (2). A load-bearing rod (11) which is detachably fixed on the vibration-proof plate (2) and is closely connected to the bottom end of the circuit board main body (1) is provided. Elastic plates (15) which are abutted against the top end of the circuit board main body (1) are fixed on both sides of the top end surface of the positioning rod (8).

2. The circuit board for preventing vibration and desoldering according to claim 1, wherein Large part welding parts (7) are arranged on both sides of the top end surface of the circuit board main body (1). A small part welding part (3) is arranged at the central position of the circuit board main body (1).

3. The circuit board for preventing vibration and desoldering according to claim 2, characterized in that Conductive parts (5) are equidistantly arranged at both ends of the circuit board main body (1). The conductive parts (5) are respectively connected to the small part welding part (3) and the large part welding part (7).

4. The circuit board for preventing vibration and desoldering according to claim 1, characterized in that, Mounting holes (10) are symmetrically formed at both ends of the vibration-proof plate (2). A plurality of screw holes (9) are formed in the vibration-proof plate (2) in a rectangular array.

5. A circuit board for preventing vibration and desoldering according to claim 4, characterized in that, A rubber positioning plate (12) is fixed at the top end of the load-bearing rod (11). A screw rod (13) which is threadedly inserted into the screw hole (9) is fixed at the bottom end of the load-bearing rod (11).

6. The circuit board for preventing vibration and solder joint detachment according to claim 1, wherein, A through hole (4) is formed at the central position of the metal connection part (6). The positioning rod (8) is inserted into the through hole (4) in a matching manner.

7. The circuit board for preventing vibration and desoldering according to claim 6, wherein, A deformation groove (17) is arranged between the two elastic plates (15). Protrusion parts (16) are fixed on the top ends of the side walls of the two elastic plates (15). An arc groove (14) is formed at the top end of the protrusion part (16). The bottom end of the protrusion part (16) is closely connected to the circuit board main body (1).

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