Ultrasonic cleaning basket for SMT (Surface Mount Technology)

Abstract

The utility model relates to an ultrasonic cleaning basket for an SMT (Surface Mount Technology), which is particularly suitable for cleaning an assembled PCB (Printed Circuit Board), and comprises a cleaning basket body, at least one positioning strip and at least two limiting strips, wherein the positioning strip is mounted at the bottom of the cleaning basket body, and a plurality of positioning grooves with upward openings are formed in the positioning strip at intervals; the limiting strips are installed on the two opposite side faces of the cleaning basket body, and limiting grooves are formed in the positions, corresponding to the positioning grooves, of the limiting strips. The PCB is placed in the cleaning basket body, the bottom of the PCB is clamped into the positioning grooves, the two sides of the PCB are clamped into the limiting grooves respectively, and fixed installation is achieved. According to the cleaning basket, through the design of the movable positioning strips at the bottom and the limiting strips on the side faces, stable fixing of PCBs of different sizes is achieved, collision damage to components in the cleaning process is effectively avoided, and the cleaning efficiency and quality are improved.

Description

Technical Field

[0001] The present application relates to an ultrasonic cleaning basket for SMT process, and is particularly suitable for cleaning assembled PCB circuit boards. Background Art

[0002] In the electronic field, SMT refers to Surface Mount Technology. This is an extremely popular and stable mature process in the electronic assembly industry, mainly used for mounting leadless or short-lead surface mount components (abbreviated as SMC / SMD, also known as chip components in Chinese) on the surface of printed circuit boards or other substrates, and then connecting and assembling the circuits by methods such as reflow soldering and wave soldering. The SMT technology originated in the 1960s and gradually developed with the emergence of miniaturized electronic devices.

[0003] The SMT technology generally consists of the following steps: printing solder paste, placing components, soldering and fixing, inspection and repair, and subsequent cleaning and drying steps, etc. In the prior art, the PCB circuit boards after the SMT process are usually cleaned by ultrasonic cleaning. During the ultrasonic cleaning process, the PCB circuit boards are fixed on the bracket by clips. The fixing of this method is not good, and the components on the surface of the PCB circuit board are often damaged by collision due to improper fixing method; and due to the inconsistent sizes of the PCB circuit boards, the cleaning efficiency is low and the cost waste is large. Therefore, an ultrasonic cleaning basket that can stably fix PCB circuit boards of different sizes, improve the cleaning efficiency and quality is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultrasonic cleaning basket with reasonable structure, simple operation and capable of adapting to PCB circuit boards of different sizes, so as to solve the problems existing in the prior art.

[0005] In a first aspect, the present application provides an ultrasonic cleaning basket for SMT process, including: a cleaning basket body, at least one positioning strip and at least two limiting strips; wherein, an upward-opening accommodation space is formed inside the cleaning basket body; the positioning strip is installed at the bottom of the cleaning basket body, and a plurality of upward-opening positioning grooves are spaced apart on the positioning strip; the limiting strips are installed on opposite side surfaces of the cleaning basket body, and limiting grooves are formed at positions corresponding to the positioning grooves on the limiting strips; when a PCB circuit board is placed in the cleaning basket body, the bottom of the PCB circuit board is snapped into the positioning grooves, and both sides of the PCB are respectively snapped into the limiting grooves to achieve fixed installation.

[0006] To ensure the stability and corrosion resistance during long-term immersion in water, the cleaning basket body is made of stainless steel.

[0007] To meet the installation requirements of PCB boards of different sizes, the positioning bar is installed at the bottom of the cleaning basket body through a first adjustment structure, and the installation position of the positioning bar can be adjusted along the width direction of the bottom surface of the cleaning basket body through the first adjustment mechanism.

[0008] The limiting bar is installed on the side of the cleaning basket body through a second adjustment mechanism, and the installation position of the limiting bar can be adjusted along the depth direction of the cleaning basket body through the second adjustment mechanism.

[0009] To facilitate the handling and transportation by workers, handles are provided on both sides of the cleaning basket body.

[0010] To enhance the protection of the PCB circuit board and prevent scratching or bruising, an elastic material layer is provided on the surface of the limiting groove and / or the positioning groove.

[0011] Furthermore, the first adjustment mechanism includes a first sliding groove and a first locking mechanism. The two ends of the positioning bar are slidably installed in the first sliding groove, and the positioning bar is fixedly installed in the first sliding groove through the first locking mechanism.

[0012] To improve the holding stability and safety of employees during handling, anti-slip textures or anti-slip sleeves are provided on the surface of the handles.

[0013] To facilitate the flow of water and improve the cleaning effect, the cleaning basket body is entirely hollowed out except for the position of the positioning bar.

[0014] To save space and facilitate transportation, matching stacking structures are provided at the top and / or bottom of the cleaning basket body.

[0015] The beneficial effects of this application are as follows:

[0016] 1. Strong adaptability: Through the design of movable positioning bars and limiting bars, it can adapt to PCB circuit boards of different sizes, meeting diverse production requirements.

[0017] 2. Good fixation: The PCB circuit board is stably fixed in the ultrasonic cleaning basket, effectively avoiding the collision damage of components on the surface of the circuit board during the cleaning process.

[0018] 3. High efficiency: Multiple circuit boards can be loaded in each basket for cleaning simultaneously, significantly improving the cleaning efficiency and reducing cost waste.

[0019] 4. Simple operation: Employees only need to perform simple operations to place the PCB circuit board into the cleaning basket and fix it, which is convenient for operation. Description of the Drawings

[0020] Figure 1According to some embodiments of the present application, a schematic structural view of the ultrasonic cleaning basket is shown;

[0021] Figure 2 According to some embodiments of the present application, it shows Figure 1 a partial enlarged view of part A in

[0022] Figure 3 According to some embodiments of the present application, it shows Figure 1 the top view of Detailed implementation manners

[0023] The technical features and advantages of the present application will be described in more detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0024] It should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0025] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the importance of the indicated technical features.

[0026] In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] Please refer to Figures 1 - 3 , the embodiments of the present application provide an ultrasonic cleaning basket for the SMT process, which is mainly used for cleaning the assembled PCB circuit board. The ultrasonic cleaning basket mainly consists of a cleaning basket body 1, a positioning strip 2, a limiting strip 3, a handle 4, and other parts.

[0028] Cleaning basket body 1: The cleaning basket body 1, as the main supporting part of the ultrasonic cleaning basket, can be made of corrosion-resistant materials to ensure stability and corrosion resistance when immersed in water for a long time. In this embodiment, the cleaning basket body 1 is made of 304 stainless steel, which has good corrosion resistance and high-temperature resistance and can work stably in the ultrasonic cleaning machine for a long time without damage. For easy manufacturing, the shape of the cleaning basket body 1 can be rectangular, with a flat bottom and vertical sides to facilitate the placement and fixation of the PCB circuit board. To reduce manufacturing costs, the cleaning basket body 1 can be formed by bending two 304 stainless steel plates of the same size after sheet metal cutting and welding them at two diagonal positions. To facilitate water circulation and improve the cleaning effect, the bottom of the cleaning basket body 1 is completely hollowed out, and multiple hollow holes 101 are also dug on each of the four sides. At the same time, to increase the strength of the cleaning basket body 1, circular steel bars 102 can be provided at the edges of the rectangular basket frame for reinforcement. The circular steel bars 102 can not only increase the strength of the basket body but also prevent scratching. For easy processing, the circular steel bars 102 can be unbent. A steel bar of the corresponding size is cut at each edge position, and the steel bars are welded and fixed at each top corner, and the welding points are polished smooth. In some embodiments, an anti-corrosion coating (such as Teflon, epoxy resin, or nickel-phosphorus alloy coating, etc.) can be applied to the outer surface of the cleaning basket body 1 to improve the corrosion resistance and service life of the cleaning basket. In other embodiments, mutually matching stacking structures (such as bosses and grooves) can be designed at the top and / or bottom of the cleaning basket body 1, so that multiple cleaning baskets can be stacked for storage to save space and facilitate transportation.

[0029] Positioning bars 2 and positioning grooves 201: At the bottom of the cleaning basket body 1, at least one movable positioning bar 2 is arranged in parallel. In some embodiments, to improve the installation stability of the PCB board, the number of positioning bars 2 can be set to two. A plurality of positioning grooves 201 are evenly opened on the positioning bar 1. The number of positioning grooves 201 determines the number of PCB boards that can be clamped at one time. The width of the positioning groove 201 is designed according to the thickness of the PCB circuit board and can be slightly larger than the thickness dimension of the PCB circuit board 4 to ensure that the PCB circuit board can be firmly clamped therein. To realize the position adjustment of the positioning bar 2, the positioning bar 2 can be installed at the bottom of the cleaning basket body 1 through a first adjustment mechanism, and the first adjustment mechanism can adjust the installation position of the positioning bar 2 along the width direction (X direction in the figure) of the cleaning basket body 1.

[0030] The positioning strip 2 can be made of a steel bar or a steel plate of stainless steel material, and is movably installed at the bottom of the cleaning basket body 1 by means of a card slot connection. If the positioning strip 2 is made of a steel plate with a relatively thin thickness, the end of the positioning strip 2 can be bent to form a baffle 202. A first chute 102 is opened at the bottom of the cleaning basket body 1. The baffle 202 is slidably installed in the first chute 102 through a first locking screw 5 so that the positioning strip 2 can slide along the first chute 102 to adjust the installation position. After adjusting the installation position of the positioning strip 2, the first locking screw 5 can be tightened for fixation. If the thickness of the positioning strip 2 is sufficient, threaded holes can also be directly opened at both ends of the positioning strip 2, and the first locking screw 5 is screwed into the above-mentioned threaded holes. Loosening the first locking screw 5 can adjust the position of the positioning strip 2, and tightening the first locking screw 5 can achieve the locking and fixation of the positioning strip 2. In some embodiments, the locking mechanism can also be a locking groove that communicates with the first chute 103 and is perpendicular in direction. After the positioning strip 2 is moved in place along the first chute 102, it is snapped into the locking groove for locking and fixation. The positioning strip 2 can be installed along the width direction (X direction in the figure) of the cleaning basket body 1, or can be installed along the length direction (Y direction in the figure) of the cleaning basket body 1. That is, the first chute 102 can be opened along the X direction or can be opened along the Y direction. If the length and width dimensions of the cleaning basket body 1 are inconsistent, different sizes of positioning strips 2 can be selected for installation to change the number of PCB boards 7 clamped at one time.

[0031] The limiting strip 3 and the limiting groove 301: On two opposite sides of the cleaning basket body 1, a limiting strip 3 is provided respectively. The installation direction of the limiting strip 3 is perpendicular to that of the positioning strip 2. A plurality of limiting grooves 301 are opened along the length direction on the limiting strip 3. The positions of the limiting grooves 301 correspond to the positions of the bottom positioning grooves 201, and the width is slightly larger than the thickness of both side edges of the PCB board 4 to ensure that the PCB board 4 can be smoothly snapped in and firmly restricted within the cleaning basket body 1. The limiting strip 3 can also be installed on the side of the cleaning basket body 1 by means of a card slot connection and is locked and fixed through a second locking mechanism 6. Its installation and adjustment methods are the same as those of the positioning strip 2.

[0032] In addition to being able to adjust the direction along the length (Y direction) or width (X direction) of the cleaning basket body 1, the limiting strip 3 can also adjust the installation position along the depth direction (Z direction in the figure) of the cleaning basket body 1. Specifically, a plurality of second chutes 102 are opened in parallel along the depth direction (Z direction) on the side of the cleaning basket body 1. The limiting strip 3 can be installed in the second chutes 103 at different depths, so as to adapt to the installation requirements of PCB boards 7 of different sizes.

[0033] In some embodiments, an elastic material layer (such as rubber, silicone, or elastic plastic) can also be provided on the surfaces of the positioning groove 201 and the limiting groove 301 to enhance the protection of the side of the PCB circuit board 4 and prevent scratching or pressing damage. The positioning strip 2 and the limiting strip 3 are designed as detachable structures and can be removed from the cleaning basket body 1, facilitating the cleaning and maintenance of the cleaning basket and component replacement as needed.

[0034] In some embodiments, second sliding grooves 104 can be designed on the four sides of the cleaning basket body 1. The limiting strip 3 can be installed along the length direction or the width direction of the cleaning basket body 1 to meet the installation requirements of more sizes of PCB boards.

[0035] To facilitate the installation of the PCB circuit board, the positioning groove 201 and the limiting groove 301 can be designed as Y-shaped card slot structures. The upper part of the positioning groove 201 / limiting groove 301 is designed as a V shape to facilitate the insertion and installation of the PCB circuit board 7, and the width of the lower groove is designed according to the thickness dimension of the PCB circuit board 7.

[0036] Design of the handle 4: On the tops of the two long sides of the cleaning basket body 1, a stainless-steel handle 4 is welded respectively. The handle 4 is designed with a smooth transition structure, conforming to the ergonomic principle, facilitating employees to grasp and carry the cleaning basket. The handle 4 is firmly welded to the cleaning basket body 1 to ensure that it will not fall off or be damaged during the handling process. Anti-slip textures or anti-slip sleeves can also be designed on the surface of the handle 4 to improve the holding stability and safety of employees during the handling process.

[0037] The specific usage method of the ultrasonic cleaning basket in this embodiment is as follows:

[0038] 1. According to the size of the PCB circuit board 7 to be cleaned, adjust the positions of the positioning strip 2 at the bottom and the limiting strip 3 on the side of the cleaning basket body 1, and lock and fix them through the first locking mechanism 5 and the second locking mechanism 6 to stably fix the PCB circuit board 7.

[0039] 2. Place the adjusted ultrasonic cleaning basket into the ultrasonic cleaner, ensuring good contact between the bottom of the ultrasonic cleaning basket and the bottom of the cleaner.

[0040] 3. Put the assembled PCB circuit boards 7 into the cleaning basket one by one, with the bottom being snapped into the positioning groove 201 and both sides being snapped into the limiting groove 301 to ensure the stable fixation of the PCB circuit board 7.

[0041] 4. Start the ultrasonic cleaner for cleaning operations. The cleaning time depends on the stain degree and cleaning requirements on the PCB circuit board 7.

[0042] 5. After cleaning, turn off the ultrasonic cleaner, take out the cleaning basket, and take out the PCB circuit boards 7 one by one for subsequent processing.

[0043] Through the description of the above specific embodiments, it can be seen that the ultrasonic cleaning basket provided by the present invention has the advantages of simple structure, convenient operation, strong adaptability, good fixing property, and high cleaning efficiency. In practical applications, this cleaning basket can significantly improve the cleaning quality and production efficiency of PCB circuit boards after the SMT process, reduce production costs and the labor intensity of personnel.

[0044] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "some examples", "exemplarily", "examples", "preferably", or "further" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An ultrasonic cleaning basket for SMT process, characterized in that: include: A cleaning basket body, wherein the interior of the cleaning basket body forms a receiving space which is open upward; At least one positioning bar, the positioning bar is installed at the bottom of the cleaning basket body, and the positioning bar is provided with a plurality of positioning grooves opening upward at intervals; At least two limit bars, the limit bars are installed on two opposite sides of the cleaning basket body, and the limit bars are provided with limit grooves at positions corresponding to the positioning grooves; The PCB circuit board is placed in the cleaning basket body, the bottom of the PCB circuit board is inserted into the positioning groove, and the two sides of the PCB are respectively inserted into the limiting grooves to achieve fixed installation.

2. The ultrasonic cleaning basket according to claim 1, characterized in that: The cleaning basket body is made of stainless steel.

3. The ultrasonic cleaning basket according to claim 1, characterized in that: The positioning bar is installed at the bottom of the cleaning basket body through a first adjustment mechanism, and the installation position of the positioning bar can be adjusted along the width direction of the bottom surface of the cleaning basket body through the first adjustment mechanism.

4. The ultrasonic cleaning basket according to any one of claims 1 to 3, characterized in that: The limiting strip is installed on the side of the cleaning basket body through a second adjusting mechanism, and the installation position of the limiting strip can be adjusted along the depth direction of the cleaning basket body through the second adjusting mechanism.

5. The ultrasonic cleaning basket according to claim 1, characterized in that: Handles are arranged on both sides of the cleaning basket body.

6. The ultrasonic cleaning basket according to claim 1, characterized in that: An elastic material layer is disposed on the surface of the limiting groove and / or the positioning groove.

7. The ultrasonic cleaning basket according to claim 3, characterized in that: The first adjustment mechanism includes a first slide groove and a first locking mechanism. Both ends of the positioning bar are slidably installed in the first slide groove. The positioning bar is fixedly installed in the first slide groove by the first locking mechanism.

8. The ultrasonic cleaning basket according to claim 5, characterized in that: The surface of the handle is provided with an anti-slip texture or an anti-slip cover.

9. The ultrasonic cleaning basket according to claim 1, characterized in that: The cleaning basket body is completely hollowed out except for the positioning strip.

10. The ultrasonic cleaning basket according to claim 1, characterized in that: The top and / or bottom of the cleaning basket body are provided with mutually matching stacking structures.

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