Structure for preventing materials from lowering head

Abstract

The utility model relates to the technical field of AC terminal seat installation, and discloses a material head lowering prevention structure, which comprises a PCB and an AC terminal, the AC terminal is welded on the PCB, the PCB is provided with a welding hole, four corners of the welding hole are provided with circular holes, the AC terminal comprises a terminal seat, the side surface of the terminal seat is provided with a connecting pin, and the connecting pin is connected with the AC terminal. The bottoms of the connecting pins exceed the bottom of the terminal base, the connecting pins are inserted into the welding holes, and the four corners of each connecting pin extend into the corresponding circular hole. According to the structure for preventing the material from lowering the head, the welding hole is formed by using the end mill with the diameter of 1.0 mm, the drill hole of the end mill is circular, and the four right-angle positions are correspondingly and additionally drilled to form the circular hole, so that when the connecting pin is inserted into the welding hole, the welding hole can be ensured to be matched with the connecting pin, and the head of the terminal seat cannot be lowered; and the circular holes can ensure that the four corners of the connecting pins and the four corners of the welding holes do not interfere with each other, so that the effect of preventing the terminal block from lowering is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of AC terminal block installation, in particular to an anti-material lowering structure. Background Technique

[0002] When a circuit board draws out and accesses power, an AC terminal block is often used as an access port. The upper end of the AC terminal block is mostly a head with a plug, and the bottom is a pin. The pin is fixed by soldering to the PCB board.

[0003] Because the weight of the plug at the upper end of the terminal is greater than the weight of the pin, a problem of top-heavy and bottom-light will be formed. When the pin is placed in the through hole of the PCB board, it is easy to tilt, and additional personnel are required at the back end for correction, which increases the production cost additionally.

[0004] The main reason for its tilt is that the pins of the AC terminal block are square, while the PCB can only make round apertures. Because the drill bit is round, the moving space of the material in the PCB hole is large after insertion, resulting in the phenomenon of material lowering. When the diameter of the PCB aperture is designed too small, the four corners of the material interfere with the PCB aperture, making it difficult for manual insertion or the pins of the material cannot be inserted into the PCB aperture, directly affecting the production efficiency.

[0005] Therefore, an anti-material lowering structure is proposed to improve the convenience of AC terminal installation. Content of the Utility Model

[0006] The purpose of the utility model is to provide an anti-material lowering structure to solve the problems raised in the above background technique.

[0007] To solve the above technical problems, the utility model provides the following technical solution: an anti-material lowering structure, including a PCB board and an AC terminal, and the AC terminal is soldered on the PCB board;

[0008] Welding holes are opened on the PCB board, and circular holes are opened at the four corners of the welding holes;

[0009] The AC terminal includes a terminal block, connection pins are installed on the side of the terminal block, the bottom of the connection pins extends beyond the bottom of the terminal block, and the connection pins are inserted into the inside of the welding holes;

[0010] The four corners of the connection pins extend into the inside of the circular holes.

[0011] Preferably, the aspect ratio of the welding hole to the connection pin is 1.2:1.0, and the diameter of the circular hole is a circular hole with a diameter of 1.0 mm.

[0012] Preferably, a limiting groove is further formed at the top of the PCB board, and the projected area of the limiting groove is equal to the projected area of the bottom of the terminal block;

[0013] The bottom of the terminal block is located inside the limiting groove.

[0014] Preferably, the depth of the limiting groove does not exceed half of the thickness of the PCB board, and the side surface of the limiting groove communicates with the side surface of the welding hole.

[0015] Preferably, a filling strip is fixedly connected to the inner wall of the welding hole, a corrugated groove is formed on the outer surface of the connecting pin, and after the connecting pin is inserted into the welding hole, the corrugated groove is clamped with the filling strip.

[0016] Preferably, the filling strips are respectively distributed on both sides of the welding hole, and the corrugated grooves are respectively formed on both sides of the connecting pin.

[0017] Preferably, the filling strip is elastic, and the bottom of the connecting pin is provided with a bevel angle.

[0018] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0019] First, the present utility model forms the welding hole by using a router with a diameter of 1.0 mm. Since the router drills a circular hole and a supplementary drill is made at the four right-angled corners to form a circular hole, when the connecting pin is inserted into the welding hole, it can ensure that the welding hole is adapted to the connecting pin so that the terminal block will not tilt downwards, and the circular hole can ensure that there is no interference between the four corners of the connecting pin and the four corners of the welding hole, achieving the effect of preventing the terminal block from tilting downwards;

[0020] Moreover, when preparing the welding hole, there is no need to use a customized tool and change the mold, which greatly reduces the preparation difficulty and preparation cost.

[0021] Second, the present utility model sets a limiting groove on the PCB board and arranges a filling strip inside the welding hole. The bottom of the terminal block is supported by the limiting groove, and the filling strip cooperates with the corrugated groove to further improve the installation stability of the AC terminal and avoid deviation during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic connection diagram of the PCB board and the AC terminal of the present utility model;

[0023] Figure 2 is a bottom view of the connection between the PCB board and the AC terminal of the present utility model;

[0024] Figure 3 is the present utility model Figure 2 Schematic enlarged view of the structure at A in;

[0025] Figure 4 Schematic diagram of the assembly of the PCB board and the AC terminal of the present utility model;

[0026] Figure 5 Schematic diagram of the circular hole structure of the present utility model;

[0027] Figure 6 For the present utility model Figure 5 Enlarged schematic diagram of the structure at position B in the present utility model;

[0028] Figure 7 For the present utility model Figure 4 Enlarged schematic diagram of the structure at position C in the present utility model.

[0029] Wherein: 1. PCB board; 101. Welding hole; 102. Circular hole; 103. Limit groove; 104. Filling strip; 2. AC terminal; 201. Terminal seat; 202. Connection pin; 203. Corrugated groove. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figure 1-7 , an anti-material bowing structure, including a PCB board 1 and an AC terminal 2, and the AC terminal 2 is welded on the PCB board 1;

[0032] The PCB board 1 is provided with welding holes 101, and circular holes 102 are provided at the four corners of the welding holes 101;

[0033] The AC terminal 2 includes a terminal seat 201, a connection pin 202 is installed on the side of the terminal seat 201, the bottom of the connection pin 202 extends beyond the bottom of the terminal seat 201, and the connection pin 202 is inserted into the inside of the welding hole 101;

[0034] The four corners of the connection pin 202 extend into the inside of the circular hole 102.

[0035] Through the above technical solution, during processing, a milling cutter with a diameter of 1.0 mm is used to form the welding hole 101. Since the milling cutter drills a circular hole, a supplementary drill is made at each of the four right-angled corners to form a circular hole 102. When the connecting pin 202 is inserted into the welding hole 101, it can ensure that the welding hole 101 matches the connecting pin 202 so that the terminal block 201 does not tilt downwards, and the circular hole 102 can ensure that there is no interference between the four corners of the connecting pin 202 and the four corners of the welding hole 101, achieving the effect of preventing the terminal block 201 from tilting downwards.

[0036] Specifically, the aspect ratio of the length to the width of the welding hole 101 and the connecting pin 202 is 1.2:1.0, and the circular hole 102 is a circular hole with a diameter of 1.0 mm.

[0037] Through the above technical solution, by setting the aspect ratio between the welding hole 101 and the connecting pin 202, the movement space of the connecting pin 202 in the welding hole 101 is minimized as much as possible, while ensuring that manual insertion can be carried out normally without difficult insertion or other phenomena. The circular hole 102 is set to avoid interference between the four corners of the connecting pin 202 and the four corners of the welding hole 101, further improving the installation convenience. Moreover, the solder can also enter from the position of the circular hole 102 for welding, which can improve the welding convenience.

[0038] Specifically, a limiting groove 103 is also opened at the top of the PCB board 1, and the projected area of the limiting groove 103 is equal to the projected area of the bottom of the terminal block 201;

[0039] The bottom of the terminal block 201 is located inside the limiting groove 103.

[0040] Through the above technical solution, the limiting groove 103 is set to further improve the installation stability of the terminal block 201. The terminal block 201 is further limited by the cooperation of the limiting groove 103 and the terminal block 201. After welding, due to the support and limitation of the bottom of the terminal block 201 by the limiting groove 103, it has better anti-tipping ability compared to directly placing the terminal block 201 on the top of the PCB board 1.

[0041] Specifically, the depth of the limiting groove 103 does not exceed half of the thickness of the PCB board 1, and the side surface of the limiting groove 103 communicates with the side surface of the welding hole 101.

[0042] Through the above technical solution, by setting the depth of the limiting groove 103, the limiting groove 103 can not only limit the bottom of the terminal block 201, but also reduce the impact on the strength of the PCB board 1 due to the opening of the limiting groove 103, and can effectively avoid the problem that the welding hole 101 cannot restrain the connecting pin 202 and cause the terminal block 201 to tilt downwards due to the excessive depth of the limiting groove 103;

[0043] The limiting groove 103 is penetrated through the welding hole 101, so that the bottom of the terminal block 201 can be completely inserted into the interior of the limiting groove 103, and when the connecting pin 202 is plugged in, it can be inserted from the side, improving the convenience of connection.

[0044] Specifically, a filling strip 104 is fixedly connected to the inner wall of the welding hole 101, and a corrugated groove 203 is formed on the outer surface of the connecting pin 202. After the connecting pin 202 is inserted into the welding hole 101, the corrugated groove 203 is clamped with the filling strip 104.

[0045] Through the above technical solution, the provided filling strip 104 is used to fill the gap between the welding hole 101 and the connecting pin 202, thereby improving the stability of the connecting pin 202 after insertion, and the provided corrugated groove 203 is used to cooperate with the filling strip 104 to make the connecting pin 202 more stable.

[0046] Specifically, the filling strips 104 are respectively distributed on both sides of the welding hole 101, and the corrugated grooves 203 are respectively formed on both sides of the connecting pin 202.

[0047] Through the above technical solution, the filling strips 104 are distributed on both sides of the welding hole 101, thereby applying pressure to the connecting pin 202 from both sides, so that the connecting pin 202 can be kept at the center of the welding hole 101 to prevent the terminal block 201 from shifting after installation.

[0048] Specifically, the filling strip 104 is elastic, and the bottom of the connecting pin 202 is provided with a bevel angle.

[0049] Through the above technical solution, the filling strip 104 is set to be elastic, so that when the connecting pin 202 is inserted, insertion can be achieved through the deformation of the filling strip 104, improving the convenience of insertion, and the bottom of the connecting pin 202 is set to a bevel angle, thereby further improving the convenience of inserting the connecting pin 202.

[0050] During use, the welding hole 101 is formed by using a milling cutter with a diameter of 1.0 mm. Since the milling cutter drills a circular hole, a circular hole 102 is formed by drilling one more knife at the four right-angled corners. When the connecting pin 202 is inserted into the welding hole 101, it can be ensured that the welding hole 101 is adapted to the connecting pin 202 so that the terminal block 201 does not tilt downwards, and the circular hole 102 can ensure that there is no interference between the four corners of the connecting pin 202 and the four corners of the welding hole 101, achieving the effect of preventing the terminal block 201 from tilting downwards;

[0051] By providing a limiting groove 103 on the PCB board 1 and a filling strip 104 inside the welding hole 101, the bottom of the terminal block 201 is supported by the limiting groove 103, and the filling strip 104 is matched with the corrugated groove 203, so as to further improve the stability of the installation of the AC terminal 2 and avoid deviation during welding.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material head-lowering prevention structure, comprising a PCB board (1) and an AC terminal (2), wherein the AC terminal (2) is welded on the PCB board (1); Features: The PCB board (1) is provided with a welding hole (101), and four corners of the welding hole (101) are provided with circular holes (102); The AC terminal (2) comprises a terminal seat (201), a connecting pin (202) is installed on the side of the terminal seat (201), the bottom of the connecting pin (202) exceeds the bottom of the terminal seat (201), and the connecting pin (202) is inserted into the inside of the welding hole (101); The four corners of the connecting pin (202) all extend into the interior of the circular hole (102).

2. The structure for preventing materials from lowering their heads according to claim 1, characterized in that: The length-to-width ratio of the welding hole (101) to the connecting pin (202) is 1.2:1.0, and the circular hole (102) has a diameter of 1.0 mm.

3. The structure for preventing materials from lowering their heads according to claim 1, characterized in that: A limiting groove (103) is also provided on the top of the PCB board (1), and the projection area of ​​the limiting groove (103) is equal to the projection area of ​​the bottom of the terminal seat (201); The bottom of the terminal seat (201) is located inside the limiting groove (103).

4. The structure for preventing materials from lowering their heads according to claim 3, characterized in that: The depth of the limiting groove (103) does not exceed half the thickness of the PCB board (1), and the side surface of the limiting groove (103) is connected to the side surface of the welding hole (101).

5. The structure for preventing materials from lowering their heads according to claim 1, characterized in that: A filling strip (104) is fixedly connected to the inner wall of the welding hole (101), and a corrugated groove (203) is provided on the outer surface of the connecting pin (202); after the connecting pin (202) is inserted into the welding hole (101), the corrugated groove (203) is clamped with the filling strip (104).

6. The structure for preventing materials from lowering their heads according to claim 5, characterized in that: The filling strips (104) are respectively distributed on both sides of the welding hole (101), and the corrugated grooves (203) are respectively opened on both sides of the connecting pins (202).

7. The structure for preventing materials from lowering their heads according to claim 6, characterized in that: The filling strip (104) is elastic, and the bottom of the connecting pin (202) is provided with a chamfered corner.

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