Pin structure of electronic component

Abstract

A pin structure of an electronic component is characterized in that at least one end of the electronic component is provided with a connecting piece, the middle section of the bottom of the connecting piece protrudes downwards and is provided with a flat pin, the width of the pin is smaller than that of the connecting piece, and the upper ends of the two side edges of the pin are respectively communicated with a vent hole arranged on the connecting piece upwards. The upper ends of the two side edges, opposite to the pins, of the vent holes are concave upwards, and when the pins are inserted into the insertion holes of the PCB, the vent holes are communicated with the gaps between the insertion holes and the pins. According to the utility model, the electronic component can be more firmly welded on the PCB.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, and more specifically to a pin structure of an electronic component. Background Art

[0002] Electronic components are an essential part of electronic products. Common electronic components include capacitors, resistors, inductors, multi-pin devices, etc. For example, fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment. As a short circuit and overcurrent protector, they are one of the most commonly used protection devices. Electronic components are usually provided with pins, which are installed by soldering the pins to the circuit board.

[0003] Electronic components are generally welded on PCB boards by welding. In order to facilitate the welding and fixing of electronic components on PCB boards, pins are set on electronic components, and the pins are inserted into the plug holes in the PCB board for welding. The pins of electronic components have various forms. When electronic components are directly plugged and welded with flat pins, the following problems will occur: the flat pins correspond to the shape of the plug holes. When the pins are plugged into the plug holes, the gap at the upper end of the plug holes is closed, and the closed space formed between the pins and the PCB board. When welding, the solder point is generally placed on the outer side of the plug hole at the bottom of the PCB board. During the welding process, especially when wave soldering is adopted, the air in the gap between the pins and the plug holes will expand due to heat and tend to be discharged outward; because the flat pins block the upper end of the plug holes, the air can only be discharged from the lower end of the plug holes and form bubbles in the solder, resulting in the pins of the electronic components being poorly soldered, making the electronic components not firmly fixed. In severe cases, the electronic components will be lifted from the circuit board, greatly affecting the quality of the circuit board. Utility Model Content

[0004] The utility model aims to provide an electronic component pin structure, which can make the electronic component more firmly welded on the PCB board.

[0005] To achieve the above purpose, the solution of the utility model is:

[0006] A pin structure of an electronic component, wherein a connecting piece is provided at at least one end of the electronic component, a flat pin is protruding downward from the bottom of the connecting piece, the width of the pin is smaller than the width of the connecting piece, the pin is inserted into a plug hole provided on a PCB board, at least one vent hole is recessed at the outside of the upper end of the pin in the bottom of the connecting piece, and the vent hole connects the gap between the plug hole and the pin.

[0007] Furthermore, the pin is located in the middle of the bottom of the connecting piece, and the upper ends of both sides of the pin are connected to the vent holes upward respectively. The vent holes are located above the PCB board when the pin is inserted into the plug hole.

[0008] Furthermore, each vent hole forms an inwardly concave notch at the bottom of the connecting piece, and the side of the vent hole close to the pin is defined as the inner end, and the inner ends of the vent hole are respectively located at the upper ends of the two side edges of the pin.

[0009] Furthermore, when the pin is inserted into the plug hole of the PCB board, the portion of the bottom of the connecting piece located outside the pin and the vent hole is mounted on the PCB board, and the inner end of the vent hole is located above the plug hole.

[0010] Furthermore, the vent holes are formed in a semicircle, and the inner ends of the semicircles of each vent hole are respectively connected to the upper ends of both sides of the pin. When the pin is inserted into the plug hole, the outer ends of the vent holes are respectively located above the PCB boards on both sides of the plug hole.

[0011] Furthermore, the connecting sheet is a flat sheet with a width.

[0012] Furthermore, at least one protrusion is provided on the pin, and when the pin is inserted into the plug hole, an interference fit is achieved between the protrusion and the plug hole, and the surface of the protrusion presses against the inner wall of the plug hole.

[0013] Furthermore, the electronic components are horizontal or vertical, and the two ends of the horizontal electronic components are respectively provided with connecting plates, and the bottom of the connecting plates are provided with pins and vents; one end of the vertical electronic components extends outward with a connecting plate, and the bottom of the connecting plate is provided with pins and vents.

[0014] Furthermore, the electronic component is a horizontal fuse, which includes end caps at both ends of the tube body, each of which has a connecting piece extending downward, and pins and vents are respectively provided at the bottom of the two connecting pieces.

[0015] Furthermore, the electronic component is a vertical fuse, which includes a connecting piece extending outward from the end cap at the upper end, respectively, provided at the upper and lower ends of the tube body, the connecting piece includes a transverse connecting piece extending outward from the outer wall of the end cap at the upper end, the outer end of the transverse connecting piece extends vertically downward to form an upright longitudinal connecting piece, and the bottom of the longitudinal connecting piece is provided with a pin and a vent.

[0016] After adopting the above scheme, when the electronic components are connected and fixed, when the flat pins are inserted into the plug holes of the PCB board for soldering, the air between the pins and the plug holes expands due to heat and can be discharged from the vents connected to the two sides of the pins, which can avoid the problem of cold soldering of the pins of the electronic components because the air can only be discharged from the lower end of the plug hole and form bubbles in the solder. In this way, the utility model has the effect of firmly soldering the electronic components on the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of the first embodiment of the utility model (horizontal fuse) installed on a PCB board;

[0018] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 for Figure 2 A cross-sectional diagram of a middle pin inserted into a plug hole;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the middle end cap and the pins;

[0021] Figure 5 for Figure 1 Front view of the middle end cap with pins;

[0022] Figure 6 This is a schematic diagram of the structure of the second embodiment of the utility model (vertical fuse) installed on a PCB board;

[0023] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0024] Figure 8 for Figure 6 Schematic diagram of the structure of the middle end cap and the pins;

[0025] Fig. 9 for Figure 6 Front view of the middle end cap with pins;

[0026] Description of the accompanying drawings: 1 tube body; 2 end cap; 3 connecting piece; 31, 621 vent hole; 311 inner end; 312 outer end; 4 pin; 41 raised part; 5 PCB board; 51 plug hole; 6 L-shaped connecting piece; 61 horizontal connecting piece; 62 longitudinal connecting piece. DETAILED DESCRIPTION

[0027] In order to further explain the technical solution of the present utility model, the present utility model is described in detail through specific embodiments below.

[0028] The utility model discloses a pin structure of an electronic component, wherein at least one end of the electronic component is provided with a connecting piece, and a flat pin is protruding downward from the bottom of the connecting piece. In the utility model, the pin width is smaller than the connecting piece width, and the pin can be inserted into a plug hole provided on a PCB board for welding, and at least one vent hole is concavely provided at the outer side of the upper end of the pin in the bottom of the connecting piece, and the vent hole can connect the gap between the plug hole and the pin.

[0029] The electronic components can be placed horizontally or vertically on the circuit board. The two ends of the horizontal electronic components can be provided with connecting pieces, and the bottom of the connecting pieces are provided with pins and vents. One end of the vertical electronic components can extend outward with a connecting piece, and the bottom of the connecting piece is provided with pins and vents.

[0030] The electronic component may be a fuse, which may include a tube body with end caps at both ends, the tube body is an insulating tube body with both ends open, a fusible body (not shown in the figure) is mounted in the tube body, and the two ends of the fusible body can be fixed on the end caps by melting solder. The fuse may also have a connecting piece extending from at least one end cap according to different forms, and a flat pin is protruding downward from the bottom of the connecting piece. The following is an explanation in conjunction with specific embodiments.

[0031] Combination Figures 1 to 5 As shown, it is the first embodiment of the utility model. The electronic component in this embodiment is a horizontal fuse, which includes end caps 2 respectively provided at both ends of the tube body 1. The end caps 2 respectively extend downward with a connecting piece. The connecting piece can be a flat sheet with width. The connecting piece 3 in this embodiment is a vertical sheet extending downward from the outer peripheral surface of the end cap 2, with a large force-bearing area and more conducive to heat dissipation. The bottoms of the two connecting pieces 3 are respectively provided with flat pins 4 protruding downward, and the two pins 4 can be parallel. The bottom of the pin 4 can be arc-shaped, which can be easily inserted into the plug hole 51. The pin 4 can be in the middle position of the bottom of the connecting piece 3. The width of the pin 4 is smaller than the width of the connecting piece 3. In this way, the electronic component is more stable when plugged into the circuit board. The pin 4 can be inserted into the plug hole 51 provided on the PCB board 5 for welding. The main improvement of the utility model is that at least one vent 31 is recessed at the outer side of the upper end of the pin 4 in the bottom of the connecting piece 3, and the vent 31 can connect the gap between the plug hole 51 and the pin 4.

[0032] The upper ends of both sides of the pin 4 can be connected to the vent holes 31 upwards, and two vent holes 31 are provided in the bottom of the connecting piece 3. Figure 2 , Figure 3As shown, the vent hole 31 is located above the PCB board when the pin 4 is inserted into the plug hole 51. Each vent hole 31 forms a concave notch at the bottom of the connecting piece 3, and the vent hole 31 is concave upward relative to the upper ends of the two sides of the pin 3, opening an exhaust port in the space originally blocked above the plug hole 51. Since a vent channel with a connecting gap is formed above the plug hole 51, when the solder 7 in the lower part of the plug hole 51 melts, the hot air can be discharged upward, which can avoid the air being discharged only from the lower end of the plug hole 51 and forming bubbles in the solder 7. The side of the vent hole 31 close to the pin 4 is defined as the inner end 311, and the inner ends 311 of the vent hole 31 are respectively located at the upper ends of the two sides of the pin 4. When the pin 4 is plugged into the plug hole 51 of the PCB board, the portion of the bottom of the connecting piece 3 located outside the pin 4 and the vent hole 31 is mounted on the PCB board 5, and the inner end 311 of the vent hole 31 is located above the plug hole 51, and the gap between the plug hole 51 and the pin 4 can be connected to the vent hole 31. In this embodiment, the two vent holes 31 form a semicircle, and the inner end 311 of the semicircle of each vent hole 31 is respectively connected to the upper end of the two side edges of the pin 4, so that the diameter of the semicircular vent hole 31 can be larger than the distance between the two side edges of the pin and the inner wall of the plug hole 51 when the pin is plugged into the plug hole 51 of the PCB board 5. When the pin 4 is plugged into the plug hole 51, the outer end 312 of the vent hole 31 can be respectively located above the PCB board on both sides of the plug hole 51.

[0033] Furthermore, at least one protrusion 41 may be provided on the pin 4 below the connecting piece 3, and the protrusion 41 may be located on one side or both sides of the pin. When the pin 4 is inserted into the plug hole 51, the protrusion 41 and the plug hole can achieve interference fit, and the surface of the protrusion 41 presses against the inner wall of the plug hole 51. By adding the protrusion 41, the pin 4 can be more firmly inserted into the PCB board 5.

[0034] Combination Figures 5 to 9 As shown in the figure, it is the second embodiment of the utility model. The difference between this embodiment and the previous embodiment is that the electronic component in this embodiment is a vertical fuse, which includes two end caps 2 respectively provided at the upper and lower ends of the tube body 1. The end cap 2 located at the lower end can be directly welded on the PCB board 5 through a pin (not shown) extending from the bottom end of the end cap. In order to make the fuse located at the upper end of the PCB firmly welded, a connecting piece is extended from the end cap 2 located at the upper end. In this embodiment, the connecting piece is an L-shaped connecting piece 6. The L-shaped connecting piece 6 includes a transverse connecting piece 61 extending outward from the outer side wall of the end cap 2 at the upper end. The outer end of the transverse connecting piece 61 extends vertically downward to form an upright longitudinal connecting piece 62. The longitudinal connecting piece 62 is supported parallel to the outer side of the upright tube body 1. The pin 4 is arranged at the bottom of the longitudinal connecting piece 62. The bottom of the longitudinal connecting piece 621 is also concavely provided with two vents 621 respectively located at the outer side of the upper end of the pin, and two notches are formed in the bottom of the longitudinal connecting piece 621.

[0035] In the above two embodiments, when the flat pin 4 is inserted into the plug hole 51 of the PCB board 5 and soldered, the air between the pin 4 and the plug hole 51 can be discharged from the vent holes 31 connected to both sides of the pin 4 after being heated and expanded due to the provision of the vent hole 31, thus changing the closed structure after the flat pin 4 is inserted into the plug hole 51, causing the hot air generated when the solder melts to be unable to be discharged. Since a vent channel connected to the gap is formed above the plug hole, the hot air can be discharged upward, thus avoiding the problem that the air can only be discharged from the lower end of the plug hole and form bubbles in the solder, thereby causing the pin of the fuse to be poorly soldered. In this way, the utility model can make the pins of the electronic components firmly soldered on the PCB board 5.

[0036] The above is only an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pin structure of an electronic component, characterized in that: A connecting piece is provided at at least one end of the electronic component, a flat pin is protruding downward from the bottom of the connecting piece, the width of the pin is smaller than the width of the connecting piece, the pin is inserted into a plug hole provided on the PCB board, and at least one ventilation hole is recessed at the outer side of the upper end of the pin in the bottom of the connecting piece, and the ventilation hole connects the gap between the plug hole and the pin.

2. The pin structure of an electronic component according to claim 1, characterized in that: The pin is located in the middle of the bottom of the connecting piece, and the upper ends of both sides of the pin are connected to the vent holes upward respectively. The vent holes are located above the PCB board when the pin is inserted into the plug hole.

3. The pin structure of an electronic component according to claim 2, characterized in that: Each vent hole forms an inwardly concave notch at the bottom of the connecting piece, and the side of the vent hole close to the pin is defined as the inner end, and the inner ends of the vent hole are respectively located at the upper ends of the two sides of the pin.

4. The pin structure of an electronic component according to claim 3, characterized in that: When the pin is plugged into the plugging hole of the PCB board, the portion of the bottom of the connecting piece located outside the pin and the vent hole is mounted on the PCB board, and the inner end of the vent hole is located above the plugging hole.

5. The pin structure of an electronic component according to claim 4, characterized in that: The vent holes are formed in a semicircle, and the inner ends of the semicircles of each vent hole are respectively connected to the upper ends of the two sides of the pin. When the pin is plugged into the plug hole, the outer ends of the vent holes are respectively located above the PCB boards on both sides of the plug hole.

6. The pin structure of an electronic component according to claim 1, characterized in that: The connecting piece is a flat piece with a width.

7. The pin structure of an electronic component according to claim 1, characterized in that: The pin is also provided with at least one protrusion, and when the pin is inserted into the plug hole, an interference fit is achieved between the protrusion and the plug hole, and the surface of the protrusion presses against the inner wall of the plug hole.

8. A pin structure of an electronic component according to any one of claims 1 to 7, characterized in that: The electronic components are horizontal or vertical. The two ends of the horizontal electronic components are respectively provided with connecting pieces, and the bottom of the connecting pieces are provided with pins and vents; one end of the vertical electronic components extends outward with a connecting piece, and the bottom of the connecting piece is provided with pins and vents.

9. The pin structure of an electronic component according to claim 8, characterized in that: The electronic component is a horizontal fuse, which includes end caps respectively arranged at both ends of a tube body, a connecting piece respectively extending downward from the end caps, and pins and vents respectively arranged at the bottom of the two connecting pieces.

10. The pin structure of an electronic component according to claim 8, characterized in that: The electronic component is a vertical fuse, which includes a connecting piece extending outward from the end cap at the upper end, and the connecting piece includes a transverse connecting piece extending outward from the outer wall of the end cap at the upper end. The outer end of the transverse connecting piece extends vertically downward to form an upright longitudinal connecting piece, and the bottom of the longitudinal connecting piece is provided with a pin and a vent.

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