CN215499802U

CN215499802U - Pin lag

Info

Publication number: CN215499802U
Application number: CN202121351560.3U
Authority: CN
Inventors: 邱泽; 陈淑伟; 周宏观; 罗卫红
Original assignee: Shenzhen Jasic Technology Co ltd
Current assignee: Shenzhen Jasic Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-11
Anticipated expiration: 2031-06-17

Abstract

The pin protecting sleeve comprises a protecting sleeve body, wherein a pin inserting tube and an exhaust tube which penetrate through the upper end and the lower end of the protecting sleeve body are arranged in the protecting sleeve body, and the pin inserting tube is communicated with a tube opening of the exhaust tube, which is positioned on the lower end face of the protecting sleeve body, so as to form an opening matched with a welding hole on a printed circuit board; and the pin insertion tube is communicated with the tube body of the exhaust tube inside the protective sleeve body close to the opening, and forms a chamber for containing air. The pin lag of this application can protect the pin not influenced by external environment, can make the tin very smoothly soak whole printed circuit board's via hole simultaneously, form full tin to solve insufficient technical problem of rosin joint, wicking, promoted the reliability of soldering, and then promote the quality of product.

Description

Pin lag

Technical Field

This application belongs to lag technical field, and more specifically says, relates to a pin lag.

Background

Power transistors such as insulated gate bipolar transistors and rectifier transistors are one of the important devices in electronic components, and are mainly used for regulating the current on printed circuit boards.

In the prior art, power tubes such as insulated gate bipolar transistors and rectifier tubes are often fixed on corresponding printed circuit boards through pins, the pins are often fixed on the printed circuit boards in a soldering mode, the pins generally need to be provided with protective sleeves to avoid being influenced by external environments, however, when the pins are soldered, an expanded high-pressure gas is formed in cavities of the pin protective sleeves, so that tin is very difficult to enter through holes of the printed circuit boards, problems of insufficient solder, insufficient tin filling and the like can be caused, and normal work of the power tubes and the printed circuit boards is influenced.

Disclosure of Invention

An object of the embodiment of the application is to provide a pin lag to solve the pin soldering that exists among the prior art and appear rosin joint, the not full technical problem of wicking easily.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the pin protecting sleeve comprises a protecting sleeve body, wherein a pin inserting tube and an exhaust tube which penetrate through the upper end and the lower end of the protecting sleeve body are arranged in the protecting sleeve body, and the pin inserting tube is communicated with a tube opening of the exhaust tube, which is positioned on the lower end face of the protecting sleeve body, so as to form an opening matched with a welding hole on a printed circuit board; and the pin insertion tube is communicated with the tube body of the exhaust tube inside the protective sleeve body close to the opening, and forms a chamber for containing air.

The application provides a pair of pin lag's beneficial effect lies in: compared with the prior art, the pin protecting sleeve comprises a protecting sleeve body, wherein the protecting sleeve body is provided with a pin inserting tube and an exhaust pipe, the pin inserting tube and the exhaust pipe penetrate from the top of the protecting sleeve body to the bottom of the protecting sleeve body, the pin inserting tube can wrap the pin to prevent the pin from being influenced by an external environment, and the pin inserting tube and the exhaust pipe are communicated at the bottom of the protecting sleeve body to form a chamber for containing air; therefore, when the printed circuit board is subjected to tin immersion welding, the bottom of the printed circuit board is filled with high-temperature liquid tin, air in the cavity of the protective sleeve body is heated instantly, the air expands rapidly, hot air can rise along the exhaust pipe to be exhausted, small negative pressure is formed in the cavity, and the liquid tin can completely immerse the welding holes of the whole printed circuit board very smoothly under the combined action of acting forces such as a buoyancy effect, a cavity negative pressure effect, a pin capillary effect and the like to form full tin; therefore, the technical problems of insufficient cold solder and tin immersion are solved, the reliability of tin soldering is improved, and the quality of products is further improved.

The structure of the exhaust pipe and the pin insertion pipes is improved, the number of the exhaust pipes and the number of the pin insertion pipes, which are arranged in the protective sleeve body, are the same, each exhaust pipe and each pin insertion pipe form a group of pipeline units, each group of pipeline units are arranged in the protective sleeve body side by side at intervals, the pin insertion pipes with corresponding number are arranged according to the number of the pins, one pin corresponds to one pin insertion pipe, and a certain distance is arranged between every two pin insertion pipes, so that the creepage distance between the pins can be increased, and the stability of the power tube is further improved.

The improved structure of the protective sleeve body is improved, the protective sleeve body is of a cuboid structure, the exhaust pipe is arranged on the protective sleeve body in parallel with the pin insertion pipe, the cuboid structure is stable in mechanical property, the structural stability of the protective sleeve body can be improved, the exhaust pipe is arranged in parallel with the pin insertion pipe, the overall structure is more compact, and the manufacturing cost is reduced.

It is right the structure of lag body is improved, one side at lag body top is equipped with the dustproof separation blade that upwards extends, dustproof separation blade is close to the mouth of pipe setting of blast pipe, the encapsulation of power tube is usually not smooth, has tiny gap usually at the position of power tube and lag body contact, sets up dustproof separation blade after, can prevent effectively that tiny particles such as dust, iron powder from falling into the gap, improves the pin root protection to the power tube, has promoted the barrier propterty of pin lag to the power tube pin.

Furthermore, the laminating of dustproof separation blade the mouth of pipe of blast pipe can prevent effectively that tiny particles such as dust, iron powder from falling into the blast pipe, blocks up the blast pipe, improves dustproof separation blade's barrier propterty.

Furthermore, the top of dustproof separation blade is equipped with the radius angle, can prevent that the power tube from installing into the pin lag, is wiped by the top of dustproof separation blade and decreases.

Furthermore, a guide convex block is arranged on the other side of the top of the protective sleeve body, and the upper surface of the guide convex block is an inclined surface inclined towards the pipe orifice of the pin insertion pipe, so that the power tube can be installed and guided, and the power tube can be conveniently connected with the protective sleeve body.

The structure of the protective sleeve body is improved, the connecting parts of the cavity in the protective sleeve body, the pin insertion tubes and the exhaust pipe are arc-shaped, so that the pins can be conveniently inserted into the pin insertion tubes, gas circulation can be smooth, and the exhaust efficiency of the exhaust pipe is improved.

The structure of the pin insertion tube is improved, the cross section of the pin insertion tube is rectangular, the applicability of the pin insertion tube can be improved, and the pin insertion tube is not limited to cylindrical pins.

On the basis, the material of lag body is the silica gel material, and the silica gel material has high temperature resistant, strong insulating nature, the material is soft, performance such as the leakproofness is good, and whole performance is good, can make the top surface and the sealed laminating of power tube of lag body, and the bottom and the sealed laminating of printed circuit board of lag body can improve overall structure's leakproofness and structural stability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a pin protecting sleeve according to an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a pin protection sleeve according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a pin protection sleeve provided in the embodiment of the present application after being installed;

fig. 4 is a schematic cross-sectional view of a pin protection sleeve according to an embodiment of the present application after being installed;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a schematic structural diagram of a bottom of a pin protection sleeve according to an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1-a protective jacket body; 11-a chamber; 12-an exhaust pipe; 13-pin cannula; 14-dustproof baffle plate; 141-rounding off; 15-guide projection; 16-opening;

2-a power tube; 21-pin;

3-a printed circuit board; 31-welding holes;

4-a radiator.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, 2 and 5, the pin protecting sleeve includes a protecting sleeve body 1, a pin inserting tube 13 and an exhaust tube 12 are disposed in the protecting sleeve body 1, the pin inserting tube 13 and the exhaust tube 12 are disposed on a tube opening of the protecting sleeve body 1, the tube opening is disposed on a lower end surface of the protecting sleeve body 1, and the pin inserting tube 13 and the exhaust tube 12 are communicated with each other to form an opening 16 matched with a position of a welding hole 31 on a printed circuit board 3; inside the shield body 1, close to the opening 16, the pin inserts 13 communicate with the body of the exhaust tube 12 and form a chamber 11 for containing air.

Compared with the prior art, the pin protection sleeve provided by the application has the advantages that the protection sleeve body 1 is provided with the pin insertion tube 13 and the exhaust pipe 12, as shown in fig. 3 and 4, the power tube 2 is installed at the top of the protection sleeve body 1, the bottom of the protection sleeve body 1 is connected with the printed circuit board 3, the pin 21 of the power tube 2 is inserted into the welding hole 31 of the printed circuit board 3 from the pin insertion tube 13, the pin insertion tube 13 can wrap the pin 21 to prevent the pin 21 from being influenced by the external environment, the power tube 2 is provided with the radiator 4 to prevent the power tube 2 from being damaged by overheating, in addition, as the protection sleeve body 1 is provided with the exhaust pipe 12, when the printed circuit board 3 is subjected to tin immersion welding, the bottom of the printed circuit board 3 is filled with high-temperature liquid tin, air in the cavity 11 of the protection sleeve body 1 is heated instantly, the air expands rapidly, and the hot air can rise and be exhausted along the exhaust pipe 12, the interior little negative pressure that forms of cavity 11, liquid tin under the combined action of effort such as buoyancy effect, cavity negative pressure effect, pin capillary effect for tin can be very smoothly soaked whole printed circuit board 3's welding hole 31, forms full tin, thereby solves rosin joint, the discontented technical problem of wicking, has promoted the reliability of soldering, makes pin 21 and printed circuit board 3 weld firmly, and then promotes the quality of product.

In specific implementation, please refer to fig. 1, the number of the exhaust pipes 12 and the pin insertion pipes 13 arranged in the protection cover body 1 is the same, each exhaust pipe 12 and each pin insertion pipe 13 form a group of pipeline units, each group of pipeline units are arranged in the protection cover body 1 side by side and at intervals, the pin insertion pipes 13 with corresponding number are arranged according to the number of the pins 21, one pin 21 corresponds to one pin insertion pipe 13, and a certain distance is arranged between each pin insertion pipe 13, so that the creepage distance between the pins 21 and the pins 21 can be increased, and further, the stability of the power tube 2 is improved.

In an embodiment, referring to fig. 1, 4 and 5, the protective cover body 1 is a rectangular parallelepiped structure, the exhaust pipe 12 and the pin insertion tube 13 are arranged on the protective cover body 1 in parallel, the rectangular parallelepiped structure has stable mechanical properties, which can improve the structural stability of the protective cover body 1, and the exhaust pipe 12 and the pin insertion tube 13 are arranged in parallel, which can make the overall structure more compact and reduce the manufacturing cost; one side of the top of the protective sleeve body 1 is provided with a dustproof baffle 14 extending upwards, the dustproof baffle 14 is arranged close to the pipe orifice of the exhaust pipe 12, the packaging of the power tube 2 is not smooth, a fine gap is formed at the contact part of the power tube 2 and the protective sleeve body 1, after the dustproof baffle 14 is arranged, fine particles such as dust and iron powder can be effectively prevented from falling into the gap, the root protection of the pins 21 of the power tube 2 is improved, and the protection performance of the pin protective sleeve on the pins 21 of the power tube 2 is improved; the dustproof baffle 14 is attached to the pipe orifice of the exhaust pipe 12, so that fine particles such as dust, iron powder and the like can be effectively prevented from falling into the exhaust pipe 12 to block the exhaust pipe 12, and the protective performance of the dustproof baffle 14 is improved; the top of the dustproof baffle plate 14 is provided with a fillet 141, so that the power tube 2 can be prevented from being scratched by the top of the dustproof baffle plate 14 when being installed in the pin protection sleeve; the opposite side at lag body 1 top is equipped with direction lug 15, and the upper surface of direction lug 15 is the inclined plane to the mouth of pipe slope of pin intubate 13, can install the direction to power tube 2, and the power tube 2 of being convenient for is connected with lag body 1.

In an embodiment, referring to fig. 2, the connection portions between the chamber 11 and the pin insertion tube 13 and the exhaust pipe 12 in the protective cover body 1 are arc-shaped, so that the pins 21 can be inserted into the pin insertion tube 13 conveniently, and the gas can flow smoothly, thereby improving the exhaust efficiency of the exhaust pipe 12.

In one embodiment, referring to fig. 1, the pin insertion tube 13 has a rectangular cross section, which can improve the applicability of the pin insertion tube 13, and is not limited to the cylindrical pin 21.

In an embodiment, the material of lag body 1 is the silica gel material, and the silica gel material has high temperature resistant, strong insulating nature, the material is soft, performance such as the leakproofness is good, and whole performance is good, can make the sealed laminating of top surface and the power tube 2 of lag body 1, and the sealed laminating of bottom and printed circuit board 3 of lag body 1 can improve overall structure's leakproofness and structural stability.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a pin lag which characterized in that: the pin inserting tube and the exhaust tube are communicated with a tube opening of the exhaust tube on the lower end face of the protective sleeve body to form an opening matched with the position of a welding hole on a printed circuit board; and the pin insertion tube is communicated with the tube body of the exhaust tube inside the protective sleeve body close to the opening, and forms a chamber for containing air.

2. A pin cover according to claim 1, wherein: the protection sleeve comprises a protection sleeve body and is characterized in that the number of the exhaust pipes and the number of the pin insertion pipes are the same, each exhaust pipe and each pin insertion pipe form a group of pipeline units, and the pipeline units are arranged in the protection sleeve body side by side at intervals.

3. A pin cover according to claim 1, wherein: the protective sleeve comprises a protective sleeve body and is characterized in that the protective sleeve body is of a cuboid structure, and the exhaust pipe and the pin insertion pipe are arranged on the protective sleeve body in parallel.

4. A pin sock according to claim 3, wherein: one side at lag body top is equipped with the dustproof separation blade that upwards extends, dustproof separation blade is close to the mouth of pipe setting of blast pipe.

5. The pin boss of claim 4, wherein: the dustproof baffle is attached to the pipe opening of the exhaust pipe.

6. The pin boss of claim 4, wherein: the top of the dustproof blocking piece is provided with a fillet.

7. The pin boss of claim 4, wherein: the other side at lag body top is equipped with the direction lug, the upper surface of direction lug is to the inclined plane of the mouth of pipe slope of pin intubate.

8. A pin cover according to claim 1, wherein: the connection parts of the cavity in the protective sleeve body, the pin insertion tube and the exhaust pipe are arc-shaped.

9. A pin cover according to claim 1, wherein: the cross section of the pin insertion tube is rectangular.

10. A pin sock according to any one of claims 1 to 9, wherein: the material of lag body is the silica gel material.