CN218135573U

CN218135573U - PCB and casing welding frock

Info

Publication number: CN218135573U
Application number: CN202222156783.5U
Authority: CN
Inventors: 王有龙; 陈聪; 钟子豪; 潘苏静; 阚世宇; 韩驰
Original assignee: Nanjing Derui Zhixin Electronic Technology Co ltd
Current assignee: Nanjing Derui Zhixin Electronic Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2022-12-27
Anticipated expiration: 2032-08-17

Abstract

The utility model provides a PCB and shell welding tool, which comprises a bottom plate, a shell and an upper plate which are arranged from bottom to top in sequence; the positioning pin is arranged on the bottom plate through a countersunk head screw, and each end of the shell is fastened in the mounting groove of the bottom plate through a round head screw; wherein a PCB is placed in the housing; the upper plate is inserted into the positioning pin; the upper plate is fixed on the bottom plate through an inner hexagonal round head screw and a nut elastic flat pad, and a plurality of observation ports and positioning and pressing screw holes are formed in the top of the upper plate; the top column is matched with the positioning compression screw hole. The utility model can observe the welding state through the observation port; the pressure can be constantly adjusted through the support pillar, the defective rate of welding of the PCB and the shell is reduced, and the defective rate is prevented.

Description

PCB and casing welding frock

Technical Field

The utility model relates to a PCB welding frock field especially relates to a PCB and casing welding frock.

Background

There is an electronic device, which needs to be soldered with a PCB after plating gold in a metal housing cavity, and finally, airtight and capping treatment is performed. Such electronic equipment has the characteristics of complex design, complex welding and assembling process, expensive devices and the like. Generally, a pressing block with the same size as the inner cavity of the shell is manufactured, and the pressing block is required to avoid a packaging device on the PCB. Before welding, the inner cavity of the shell is coated with soldering paste, then the PCB is placed in the inner cavity of the shell, then the pressing block is placed in the inner cavity of the shell to press the PCB, and finally the shell is placed on a welding table to be heated, so that the soldering paste is melted, and the welding is completed.

This solution generally has the following drawbacks:

1. the shell and the pressing block are both solid bodies, and the states of the PCB and the soldering tin inside the shell and the pressing block cannot be observed

2. The pressing block only presses the PCB by means of self weight, the PCB device needs to be avoided for grooving (the grooving is generally opened for preventing the device from being damaged), the whole stress of the PCB is uneven, and the pressure applied to the PCB cannot be freely adjusted. The soldering tin is in a liquid state after being melted and cannot be evenly paved at the bottom of the PCB, so that the defects of hollowing, cracks, inconsistent height and the like between the PCB and the shell after welding are caused, the product performance is finally influenced, and even the product becomes a defective product.

3. The shell is also provided with a plurality of airtight connectors, the soldering tin is in a liquid state after being dissolved, the connectors are not provided with corresponding limiting devices, the connectors have certain drifting motion during welding, the blind-mate connectors can cause inaccurate positioning, and the soldering tin is solidified after drifting and can cause defects such as cracks, hollows and the like, so that the airtightness performance is influenced.

The monetary and time costs associated with the trap increase as described above.

Disclosure of Invention

In order to solve the problems, the invention discloses a PCB and shell welding tool which can observe the welding state constantly through an observation port; can reduce PCB and casing welded defective rate through the continuous adjusting pressure of fore-set, prevent the defective rate.

A PCB and shell welding tool comprises a bottom plate, a shell and an upper plate which are sequentially arranged from bottom to top; the positioning pin is arranged on the bottom plate through a countersunk head screw, and each end of the shell is fastened in the mounting groove of the bottom plate through a round head screw; wherein a PCB is placed in the housing; the upper plate is inserted into the positioning pin; the upper plate is fixed on the bottom plate through an inner hexagonal round head screw and a nut elastic flat pad, and the top of the upper plate is provided with a plurality of observation ports and positioning compression screw holes; the top column is matched with the positioning compression screw hole.

The surface of the top pillar is threaded, so that the top pillar is conveniently in threaded connection with the pressing screw hole, and the upper position and the lower position of the top pillar are conveniently adjusted.

The top column adopts the polytetrafluoroethylene with high temperature resistance and softer hardness, so that the service life is prolonged

Two sides of the upper plate are provided with fixed openings; the hexagon socket head cap screw passes the bottom plate and fixed opening and the nut is played flat pad and is connected fixedly, is convenient for fix a position the installation fast, improves the efficiency of installation.

The utility model discloses a theory of operation:

1. installing a positioning pin on a bottom plate by using a countersunk head screw, placing a PCB, soldering paste and a connector into a shell, fixing the shell in an installation groove on the bottom plate by using a round head screw, inserting an upper plate into the positioning pin, fixing the upper plate on the bottom plate by using an inner hexagonal round head screw and a nut elastic flat pad, and screwing in a support pillar; the force for screwing in the shore is adjusted through the observation port of the upper plate according to actual conditions.

2. The assembled tool is placed on a hot table for heating, and heat is conducted into the shell through heat conduction. Through the observation port on the upper plate, according to the actual conditions in the welding process, the screw thread screw-in amount of the support pillar is adjusted, and the limit of the PCB and the connector is completed.

The utility model has the advantages that:

1. the welding state can be observed constantly through the observation port;

2. the pressure can be continuously adjusted through the top column, and the defective rate of welding the PCB and the shell is reduced;

3. the drift of the airtight connector can be limited through the top column, and the yield of products is improved.

Drawings

FIG. 1 is a schematic view of the installation of the bottom plate of the present invention;

FIG. 2 is a schematic view of the mounting structure of the housing and the bottom plate of the present invention;

FIG. 3 is a schematic view of the installation structure of the upper plate and the bottom plate;

FIG. 4 is a schematic structural view of the installation of the jack-post and the tool;

FIG. 5 is a schematic structural view of the present invention;

list of reference numerals:

wherein 1-a bottom plate; 2-countersunk head screw; 3, positioning pins; 4-a shell; 5-PCB; 6-round head screw; 7-hexagon socket head cap screw; 8-nut spring flat cushion; 9-upper plate; 10-a top pillar; 9-1-viewport; 9-2-positioning and pressing screw holes; 9-3-fixed opening.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and detailed description, which will be understood as being illustrative only and not limiting in scope. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The PCB and shell welding tool comprises a bottom plate 1, a shell 4 and an upper plate 9 which are sequentially arranged from bottom to top; as shown in fig. 1, the positioning pin 3 is mounted to the base plate 1 by a countersunk screw 2.

As shown in fig. 2, each end of the housing 4 is fastened in the mounting groove of the base plate 1 by a round head screw 6; wherein the housing 4 has a PCB5 placed therein.

As shown in fig. 3 to 5, the upper plate 9 is inserted into the positioning pin 3; two sides of the upper plate 9 are provided with fixed openings 9-3; the inner hexagonal round head screw 7 passes through the bottom plate 1 and the fixing opening 9-3 to be connected and fixed with the nut elastic flat pad 8; fixing an upper plate 9 on a bottom plate 1, wherein the top of the upper plate 9 is provided with a plurality of observation ports 9-1 and positioning and pressing screw holes 9-2; wherein the surface of the top pillar 10 is threaded; the top column 10 is matched with the positioning and pressing screw hole 9-2.

The support pillar 10 is made of high-temperature-resistant and soft-hardness polytetrafluoroethylene and screwed into the support pillar 10; the force for screwing in the shore is adjusted through the observation port of the upper plate according to actual conditions.

The assembled tool is placed on a hot table for heating, and heat is conducted into the shell 4 through heat conduction; the screw thread screwing amount of the top column 10 is adjusted through the observation port 9-1 on the upper plate 9 according to the actual situation in the welding process, and the limiting and the pressure on the PCB and the connector are completed. The welding state can be observed at any time through the observation port 9-1.

The embodiment can continuously adjust the pressure through the top column, and the defective rate of welding the PCB and the shell is reduced; meanwhile, the drift of the airtight connector can be limited through the top column, and the yield of products is improved

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.

Claims

1. The utility model provides a PCB and casing welding frock which characterized in that: comprises a bottom plate (1), a shell (4) and an upper plate (9) which are arranged from bottom to top in sequence; the positioning pin (3) is installed on the bottom plate (1) through the countersunk head screw (2), and each end of the shell (4) is fastened in the installation groove of the bottom plate (1) through the round head screw (6); wherein a PCB (5) is placed in the shell (4); the upper plate (9) is inserted into the positioning pin (3); an upper plate (9) is fixed on a bottom plate (1) through an inner hexagonal round head screw (7) and a nut elastic flat pad (8), and the top of the upper plate (9) is provided with a plurality of observation ports (9-1) and positioning and pressing screw holes (9-2); the top column (10) is matched with the positioning and pressing screw hole (9-2).

2. The PCB and shell welding tool of claim 1, wherein: the surface of the top pillar (10) is threaded.

3. The PCB and shell welding tool of claim 1, wherein: the top column (10) is made of polytetrafluoroethylene.

4. The PCB and shell welding tool of claim 1, wherein: two sides of the upper plate (9) are provided with fixed openings (9-3); the inner hexagonal round head screw (7) penetrates through the bottom plate (1) and the fixing opening (9-3) to be connected and fixed with the nut elastic flat pad (8).