CN209394127U - It is a kind of for guaranteeing the positioning device of component assembly height - Google Patents

Abstract

The utility model discloses a kind of for guaranteeing the positioning device of component assembly height, it is related to Wave soldering field, solve the problems, such as that welding rear gasket is not easily taken out and element is crooked, it is characterized in that: including gasket, upper cover, limited block and spring spindle, gasket is placed between element and circuit board, upper cover card is on circuit boards, spring spindle is fixed by screws on lid, limited block is fixed on upper lid by spring spindle, gasket plays the role of restriction element height, fixing element is played the role of in the cooperation of limited block and spring spindle, prevent element crooked in the welding process；The utility model has the characteristics that high temperature resistant, deformation are small by gasket of the polytetrafluoroethylene (PTFE) as element, while teflon gasket is easy to take out；The utility model also cooperates spring spindle fixing element by limited block, so that will not skew in element welding process.

Description

A positioning device for ensuring the assembly height of parts

technical field

The utility model relates to the technical field of wave soldering, in particular to a positioning device for ensuring the assembly height of parts.

Background technique

With the rapid development of the electronics industry, more component assembly requirements have been put forward. Wave soldering is the first choice for circuit board assembly and welding of automotive electronic products. According to the diversity of circuit board components, there will be various requirements for soldering. , under normal circumstances, the plug-in components are required to be close to the board surface to avoid floating and reduce the damage caused by the collision of the components, but there are also circuit boards that require the plug-in components to float due to the assembly requirements of the whole machine, and there are precision requirements for the floating height, and It is not allowed to damage the pins of the plug-in components, and it is not allowed to skew the components after welding.

The existing ways to make the components float are two forms: K-pinning the components or adding pads between the plug-in and the circuit board. K-pinning the components will inevitably damage the pins and require investment in equipment costs for K-pinning. Add a pad between the plug-in and the circuit board, and it is not easy to take the gasket out after the wave crest; the upper cover of the wave soldering tray is generally a spring ejector, but the actual plug-in is cylindrical, and the plug-in cannot be skewed only with the spring ejector.

In order to solve these problems, a practical fixture is designed without damaging the pins and taking the pads easily, which is used to ensure the assembly height between the plug-in and the circuit board without skewing, reducing production costs and meeting the requirements Special assembly and welding requirements improve production capacity and efficiency.

Utility model content

The technical problem to be solved by the utility model is to provide a positioning device for ensuring the assembly height of the parts in view of the above defects, so as to solve the problem that the gasket is not easy to be taken out and the components are skewed after welding.

In order to achieve the above object, the utility model provides the following technical solutions:

A positioning device used to ensure the assembly height of parts, including a gasket, an upper cover, a limit block and a spring ejector; the gasket is placed between the component and the circuit board, the upper cover is stuck on the circuit board, and the spring ejector passes through The screw is fixed on the upper cover, the limit block is fixed on the upper cover through the spring ejector rod, the spacer plays the role of limiting the height of the component, the cooperation of the limit block and the spring ejector rod plays the role of fixing the component, preventing the component from Skewing during welding.

As a further solution of the utility model, the gasket is processed by polytetrafluoroethylene, and the bottom of the gasket is provided with an anti-interference groove, and the depth of the anti-interference groove is 1.3mm.

As a further solution of the present invention, the fixed position of the spring ejector rod corresponds to the position of the components on the circuit board.

As a further solution of the present utility model, the limiting block is fixedly connected with the spring ejector rod, and a positioning groove is provided at the bottom of the limiting block, and the inner contour shape of the positioning groove is the same as the outer contour shape of the component.

As a further solution of the utility model, the width value of the gasket is 4mm shorter than the distance value of the corresponding component pins, the length value is twice the width of the component body, and the height value is the preset height of the component bottom and the circuit board.

A PCBA welding tool comprising the positioning device for ensuring the assembly height of parts.

In summary, compared with the prior art, the utility model has the following beneficial effects:

The utility model uses polytetrafluoroethylene as the gasket of the element, which has the characteristics of high temperature resistance and small deformation, and at the same time, the polytetrafluoroethylene gasket is easy to take out; No skewing during welding.

Description of drawings

Fig. 1 is a structural schematic diagram of a positioning device for ensuring the assembly height of parts in an assembled state.

Fig. 2 is a schematic structural view of the gasket in the positioning device used to ensure the assembly height of the parts.

Reference signs: 1-gasket, 2-top cover, 3-limit block, 4-spring ejector rod, 5-element, 6-circuit board.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. For example, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

Example 1

As shown in Figures 1 to 2, a positioning device for ensuring the assembly height of parts includes a gasket 1, an upper cover 2, a limit block 3 and a spring ejector 4; the gasket 1 is placed on the component 5 and the circuit board 6, the upper cover 2 is stuck on the circuit board 6, the limit block 3 is fixed on the upper cover 2 by the spring ejector 4, and the spring ejector 4 is fixed on the upper cover 2 by screws;

The spacer 1 is processed by polytetrafluoroethylene, the distance between the two sides of the spacer 1 is 2 mm from the pins of the component 5, the length is twice the width of the body of the component 5, and the height is equal to the bottom of the component 5 and the circuit board 6 At the same time, in order to avoid interference between the bottom of the gasket 1 and other components on the circuit board 6, the bottom of the gasket 1 is provided with an anti-interference groove with a depth of 1.3mm;

The upper cover 2 is an upper cover plate in the prior art, and the fixed position of the spring ejector rod 4 corresponds to the position of the element 5 on the circuit board 6, and is used for fixing the element 5. The limiting block 3 and the spring ejector rod 4 Fixed connection, the bottom of the limit block 3 is provided with a positioning groove, the shape of the inner contour of the positioning groove is the same as that of the outer contour of the component 5, which is used to limit the position of the component 5 and prevent the component 5 from skewing during welding.

The mode of operation of the utility model is:

Place the semi-finished circuit board after patching on the bottom plate of the wave soldering tray, then place the gasket between the component 5 and the circuit board 6, buckle the upper cover 2 on the bottom plate, and then place the circuit board 6 on the wave soldering track On, after the soldering is completed, remove the upper cover 2 and spacer 1, and then remove the circuit board 6 from the wave soldering tray.

Example 2

A PCBA welding tool including a positioning device for ensuring the assembly height of parts, the positioning device for ensuring the assembly height of parts is the same as that in Embodiment 1.

In summary, the working principle of the present utility model is:

PTFE has the characteristics of good heat resistance and high toughness. During welding, the gasket made of PTFE has a small deformation and a small change in the height of the gasket, which ensures the height of the component from the circuit board during welding. Its toughness is high, and the gasket is easy to take out after welding; the limit groove in the limit block 3 is processed according to the outer contour of the component 5, so that the limit block 3 and the component 5 are perfectly matched to prevent the component 5 from skewing during the welding process.

It should be noted that the upper cover in this application is the application of the prior art, and the innovation of this application is to use polytetrafluoroethylene as the gasket material and the limit block to limit the components, which effectively solves the problem that the gasket is not easy to weld after welding. Problem with taking out and skewing components.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (6)

1. A positioning device for ensuring the assembly height of parts, including a gasket (1), an upper cover (2) and a spring ejector rod (4), and the gasket (1) is placed on the component (5) and the circuit board (6) ), the upper cover (2) is stuck on the circuit board, and the spring ejector rod (4) is fixed on the upper cover (2) by screws, and it is characterized in that it also includes a limit block (3), a limit block (3 ) is fixed on the upper cover (2) through the spring ejector rod (4). 2. The positioning device for ensuring the assembly height of parts according to claim 1, characterized in that, the gasket (1) is made of polytetrafluoroethylene, and the bottom of the gasket (1) is provided with an anti-interference groove , The anti-interference groove is 1.3mm deep. 3. The positioning device for ensuring the assembly height of parts according to claim 2, characterized in that the fixed position of the spring jack (4) corresponds to the position of the component (5) on the circuit board (6). 4. The positioning device for ensuring the assembly height of parts according to claim 3, characterized in that, the limit block (3) is fixedly connected with the spring ejector rod (4), and the bottom of the limit block (3) is provided with The positioning groove, the shape of the inner contour of the positioning groove is the same as the shape of the outer contour of the element (5). 5. The positioning device for ensuring the assembly height of parts according to any one of claims 1-4, characterized in that the width value of the spacer (1) is 4mm shorter than the pin distance value of the corresponding component (5), and the length value It is twice the width value of the component (5) body, and the thickness value is the preset height of the bottom of the component (5) and the circuit board (6). 6. A PCBA welding tool comprising the positioning device for ensuring the assembly height of parts according to any one of claims 1-5.