PCBA board packaging equipment and its nozzle anti-collision mechanism

Abstract

This application discloses a PCBA board packaging device and its nozzle anti-collision mechanism, comprising: a mounting bracket with a first through hole for the nozzle to pass through; an anti-collision assembly disposed around the mounting bracket, the anti-collision assembly including a connecting plate, a sensor, and a movable plate; the connecting plate is fixedly connected to the mounting bracket; the sensor is fixedly disposed on the connecting plate and is electrically connected to a control unit that controls the movement of the nozzle; the movable plate is slidably connected to the side of the connecting plate away from the mounting bracket, and an elastic element is provided between the movable plate and the connecting plate; the movable plate has a protective position and an alarm position. When the movable plate is in the protective position, the movable plate is subjected to the force of the elastic element and maintains a predetermined distance from the connecting plate in a predetermined direction; when the movable plate is in the alarm position, the movable plate can move inward relative to the connecting plate, the elastic element is compressed, and the sensor is triggered. The PCBA board packaging device and its nozzle anti-collision mechanism of this application can ensure that the nozzle can move smoothly and improve the packaging yield.

Description

Technical Field

[0001] This specification relates to the field of circuit board packaging technology, and in particular to a PCBA board packaging device and its nozzle anti-collision mechanism. Background Technology

[0002] The description in this section provides only background information relevant to the disclosure in this specification and does not constitute prior art.

[0003] There are many packaging methods for PCBA (Printed Circuit Board + Assembly) boards, such as applying conformal coating, potting, and low-pressure injection molding. Each of these methods has its own advantages and disadvantages: Directly spraying conformal coating, although simple, convenient, and easy to implement, cannot truly protect the circuit board, nor can it achieve waterproofing or shockproofing; over time, the packaging may fail. Potting is cumbersome, inefficient, costly, and unreliable. Low-pressure injection molding uses low-pressure injection equipment, special molds, and adjusts the injection pressure and time to complete the circuit board packaging; however, this method has high mold design and manufacturing costs, and the properties of the adhesive itself have a significant impact on the packaging.

[0004] A PCBA board encapsulation method utilizes a spraying assembly that can control a linear reciprocating motion in a horizontal direction to spray UV adhesive onto the target area of ​​the PCBA board, suitable for reliable encapsulation of low-profile PCBA boards. Furthermore, the UV adhesive cures quickly, enabling rapid and reliable encapsulation of localized areas of the PCBA board, resulting in high production efficiency. However, during the movement of the spraying assembly's nozzle, it may encounter external forces (such as human contact or other objects), which can affect the nozzle's movement path, preventing it from accurately encapsulating along the predetermined path and leading to poor encapsulation.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions in this specification and facilitating understanding by those skilled in the art. The fact that these solutions have been described in the background section of this specification should not be construed as meaning that the aforementioned technical solutions are known to those skilled in the art. Utility Model Content

[0006] In view of the shortcomings of the prior art, one object of this specification is to provide a PCBA board packaging device and its nozzle anti-collision mechanism, which can ensure that the nozzle can move smoothly and improve the packaging yield.

[0007] To achieve the above objectives, this specification provides a nozzle anti-collision mechanism for a PCBA board packaging device, comprising: A mounting bracket having a first through hole; the first through hole is for the nozzle to pass through; An anti-collision assembly is disposed around the mounting bracket. The anti-collision assembly includes a connecting plate, a sensor, and a movable plate. The connecting plate is fixedly connected to the mounting bracket. The sensor is fixedly disposed on the connecting plate and is electrically connected to a control unit that controls the movement of the nozzle. The movable plate is slidably connected to the side of the connecting plate away from the mounting bracket. An elastic element is provided between the movable plate and the connecting plate. The movable plate has a protective position and an alarm position. When the movable plate is in the protective position, it is subjected to the force of the elastic element and maintains a predetermined distance from the connecting plate in a predetermined direction. When the movable plate is in the alarm position, it can move inward relative to the connecting plate, the elastic element is compressed, and the sensor is triggered.

[0008] In a preferred embodiment, the connecting plate is fixedly provided with a slide rail extending along the predetermined direction, and the moving plate is slidably connected to the slide rail by a slider; the connecting plate is also fixedly provided with a limiting post extending along the predetermined direction, and the moving plate is provided with a second through hole for the limiting post to pass through.

[0009] In a preferred embodiment, the limiting post includes a connected column and a boss, the boss being located at the end of the column away from the connecting plate, and the diameter of the boss being larger than the diameter of the column; the second through hole includes a connected first portion and a second portion, the second portion being located at the end of the first portion away from the connecting plate; the diameter of the first portion is greater than or equal to the diameter of the column, and the diameter of the first portion is smaller than the diameter of the boss; the diameter of the second portion is greater than or equal to the diameter of the boss, and the diameter of the second portion is larger than the diameter of the first portion.

[0010] In a preferred embodiment, when the movable plate is in the protected position, the boss abuts against the step surface formed between the first part and the second part; the predetermined distance is equal to the length by which the limiting post protrudes from the connecting plate in the predetermined direction; and the elastic element is sleeved on the outside of the post.

[0011] In a preferred embodiment, the movable plate includes two first plates and a second plate connected between the two first plates and connected to the ends of the first plates; the first plates extend along the predetermined direction, and the second plate extends along a horizontal direction, which is perpendicular to the predetermined direction; there are two slide rails located at both ends of the connecting plate in the horizontal direction, and the two first plates are slidably connected to the two slide rails respectively.

[0012] In a preferred embodiment, there are two limiting posts, both located at the end of the connecting plate away from the mounting bracket, and the two limiting posts are spaced apart in the horizontal direction; the second plate is provided with two second through holes spaced apart in the horizontal direction.

[0013] In a preferred embodiment, the sensor includes a body, a connector, and a roller. The body is fixedly connected to the connecting plate. One end of the connector is connected to the body, and the other end is connected to a rotatable roller. The axis of the roller is parallel to the horizontal direction. The connector is elastic. The roller is in contact with the end of the movable plate near the mounting bracket.

[0014] In a preferred embodiment, there are two sensors, which are respectively connected to both sides of the connecting plate in the horizontal direction; the roller is in contact with the side of the first plate facing the mounting bracket.

[0015] In a preferred embodiment, the projection of the mounting bracket in the horizontal plane is rectangular; the number of anti-collision components is four, which are respectively disposed outside the four sides of the rectangle.

[0016] This application also provides a PCBA board packaging device, including a nozzle and a nozzle anti-collision mechanism as described in any of the above embodiments. Beneficial effects

[0017] The nozzle anti-collision mechanism of the PCBA board packaging equipment provided in this embodiment uses an anti-collision component arranged around the mounting bracket. This component includes a connecting plate, a sensor, and a moving plate. The moving plate and the connecting plate are slidably connected, and an elastic element is provided between them, allowing the moving plate to have a protective position and an alarm position. Under normal conditions, the moving plate is in the protective position, maintaining a predetermined distance from the connecting plate in a predetermined direction. When the moving plate is impacted by an external force, it moves inward relative to the connecting plate, thus switching from the protective position to the alarm position. At this time, the elastic element is compressed, and the sensor is triggered. The elastic element can buffer and absorb the impact. The control unit, electrically connected to the sensor, controls the nozzle to stop working, thus preventing the adhesive spraying path from changing due to external impact. This ensures smooth nozzle movement and improves the packaging yield.

[0018] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto.

[0019] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0020] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the nozzle anti-collision mechanism of a PCBA board packaging device provided in this embodiment; Figure 2 for Figure 1 A three-dimensional structural diagram after removing the nozzles and part of the mounting brackets; Figure 3 for Figure 2 Top view; Figure 4 This is a three-dimensional structural diagram of an anti-collision component provided in this embodiment; Figure 5 for Figure 4 Another structural diagram from a different perspective; Figure 6 This is a three-dimensional structural diagram of a mounting bracket provided in this embodiment; Figure 7 for Figure 6 Top view; Figure 8 This is a schematic diagram of the structure of a mounting bracket provided in this embodiment when a nozzle is installed; Figure 9 This is a three-dimensional structural diagram of a nozzle provided in this embodiment; Figure 10 for Figure 9 Top view; Figure 11 This is a three-dimensional structural diagram of a first support provided in this embodiment; Figure 12 for Figure 11 Top view.

[0023] Explanation of reference numerals in the attached figures: 1. Nozzle; 11. Mounting part; 12. First abutment edge; 13. Second abutment edge; 14. First mounting hole; 2. First bracket; 21. First through hole; 22. Mounting surface; 23. Second mounting hole; 24. Third mounting hole; 25. Fourth mounting hole; 26. Fifth mounting hole; 3. Limiting part; 31. Limiting pin; 32. Limiting block; 4. Second bracket; 5. Third bracket; X, First direction; Y, Second direction; 6. Mounting bracket; 7. Anti-collision component; 71. Connecting plate; 72. Sensor; 721. Body; 722. Connector; 723. Roller; 73. Moving plate; 731. Second through hole; 732. First plate; 733. Second plate; 74. Elastic element; 75. Slider; 76. Limiting post; 761. Column; 762. Boss; P, Predetermined direction; Q, Horizontal direction. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figures 1 to 5 This application provides a nozzle anti-collision mechanism for a PCBA board packaging device, including: a mounting bracket 6 and an anti-collision component 7.

[0028] Among them, such as Figure 2 As shown, the mounting bracket 6 has a first through hole 21. The first through hole 21 is for the nozzle 1 to pass through. An anti-collision assembly 7 is disposed around the mounting bracket 6. The anti-collision assembly 7 includes a connecting plate 71, a sensor 72, and a movable plate 73. The connecting plate 71 is fixedly connected to the mounting bracket 6, realizing the connection between the anti-collision assembly 7 and the mounting bracket 6. The sensor 72 is fixedly disposed on the connecting plate 71. The sensor 72 is electrically connected to the control unit that controls the movement of the nozzle 1, so that the sensor 72 can transmit the received collision signal to the control unit. The movable plate 73 is slidably connected to the side of the connecting plate 71 facing away from the mounting bracket 6, and an elastic member 74 is provided between the movable plate 73 and the connecting plate 71. The movable plate 73 has a protective position and an alarm position. The movable plate 73 is in the protective position (e.g., Figure 4 When the movable plate 73 is in the alarm position (as shown), it is subjected to the force of the elastic element 74 and maintains a predetermined distance from the connecting plate 71 in the predetermined direction P. Figure 3 When the movable plate 73 is located at the bottom (as shown), the movable plate 73 can move inward relative to the connecting plate 71, the elastic element 74 is compressed and the sensor 72 is triggered.

[0029] The anti-collision mechanism for the nozzle of the PCBA board packaging equipment provided in this embodiment includes an anti-collision component 7 arranged around the mounting bracket 6. The anti-collision component 7 includes a connecting plate 71, a sensor 72, and a moving plate 73. The moving plate 73 and the connecting plate 71 are slidably connected, and an elastic element 74 is provided between them, so that the moving plate 73 has a protective position and an alarm position. Under normal conditions, the moving plate 73 is in the protective position and maintains a predetermined distance from the connecting plate 71 in a predetermined direction P. When the moving plate 73 is impacted by an external force, it moves inward relative to the connecting plate 71, thereby switching the moving plate 73 from the protective position to the alarm position. At this time, the elastic element 74 is compressed and the sensor 72 is triggered. The elastic element 74 can buffer and absorb the impact. The control unit electrically connected to the sensor 72 controls the nozzle 1 to stop working, so that the glue spraying path will not be changed due to the external force impact, which can ensure that the nozzle 1 can move smoothly and improve the packaging yield.

[0030] In this embodiment, a slide rail (not shown) extending in a predetermined direction P is fixedly provided on the connecting plate 71. The moving plate 73 is slidably connected to the slide rail via a slider 75, thereby enabling the moving plate 73 to move relative to the connecting plate 71. A limiting post 76 extending in the predetermined direction P is also fixedly provided on the connecting plate 71. The moving plate 73 is provided with a second through hole 731 for the limiting post 76 to pass through, and the limiting post 76 can guide the movement of the moving plate 73.

[0031] like Figure 2 and Figure 3In fact, the limiting post 76 includes a connected post 761 and a boss 762. The boss 762 is located at the end of the post 761 away from the connecting plate 71, and the diameter of the boss 762 is larger than the diameter of the post 761, which can limit the movement plate 73 and prevent the movement plate 73 from falling off from the direction away from the connecting plate 71. Correspondingly, the second through hole 731 includes a connected first part and a second part, with the second part located at the end of the first part away from the connecting plate 71. The first part allows the post 761 to pass through, so the diameter of the first part is greater than or equal to the diameter of the post 761. Furthermore, the diameter of the first part is smaller than the diameter of the boss 762, thereby restricting the boss 762 and preventing it from passing through the first part. The diameter of the second part is greater than the diameter of the first part, and the diameter of the second part is greater than or equal to the diameter of the boss 762, allowing the boss 762 to pass through.

[0032] Specifically, such as Figure 4 As shown, when the movable plate 73 is in the protected position, the boss 762 abuts against the stepped surface formed between the first and second parts. The predetermined distance is equal to the length of the limiting post 76 protruding from the connecting plate 71 in the predetermined direction P. Additionally, an elastic member 74 is sleeved on the post 761, which provides a mounting position for the elastic member 74. The two ends of the elastic member 74 abut against the connecting plate 71 and the movable plate 73, respectively. The elastic member 74 can be a spring, capable of being compressed and stretched to its natural state along the predetermined direction P.

[0033] In this embodiment, the movable plate 73 includes two first plates 732 and a second plate 733 connected between the two first plates 732 and connected to the ends of the first plates 732. The first plates 732 extend along a predetermined direction P, and the second plate 733 extends along a horizontal direction Q, which is perpendicular to the predetermined direction P. The horizontal direction Q and the predetermined direction P can be two perpendicular directions in the horizontal plane. There are two slide rails located at both ends of the connecting plate 71 in the horizontal direction Q. The two first plates 732 are slidably connected to the two slide rails respectively. By setting the slide rails and the first plates 732 on both sides of the connecting plate 71, space can be saved, and the second plate 733, which receives the impact, can be made as long as possible, which can effectively intercept the impact of external forces, thereby protecting the nozzle 1.

[0034] Specifically, there are two limiting posts 76, both located at the end of the connecting plate 71 away from the mounting bracket 6, and the two limiting posts 76 are spaced apart in the horizontal direction Q. The second plate 733 is provided with two second through holes 731 spaced apart in the horizontal direction Q, which can make the structure of the anti-collision component 7 more stable and the anti-collision effect better.

[0035] In this embodiment, the sensor 72 includes a body 721, a connector 722, and a roller 723. The body 721 is fixedly connected to the connecting plate 71. One end of the connector 722 is connected to the body 721, and the other end is connected to a rotatable roller 723. The axis of the roller 723 is parallel to the horizontal direction Q. The connector 722 is elastic. The roller 723 contacts the end of the movable plate 73 near the mounting bracket 6. When the movable plate 73 is impacted and moves, the roller 723 rolls and moves accordingly. Because the connector 722 is elastic, when the state of the roller 723 at one end of the connector 722 changes, the part connected to the body 721 at the other end can transmit the change of the roller 723 to the body 721, thereby enabling the sensor 72 to monitor the state of the movable plate 73.

[0036] Preferably, in a collision avoidance assembly 7, there are two sensors 72, which are respectively connected to both sides of the connecting plate 71 in the horizontal direction Q. The roller 723 contacts the side of the first plate 732 facing the mounting bracket 6, thereby enabling more comprehensive monitoring of the status of the moving plate 73.

[0037] like Figure 2 and 7 As shown, the projection of the mounting bracket 6 in the horizontal plane is a rectangle. Therefore, the number of anti-collision components 7 is preferably four, which are respectively set outside the four sides of the rectangle, so that anti-collision protection can be provided in the four directions of front, back, left and right of the mounting bracket 6.

[0038] In this embodiment, such as Figure 6 As shown, the mounting bracket 6 includes a first bracket 2, a limiting part 3, and a second bracket 4.

[0039] The first bracket 2 has a first through hole 21 and a mounting surface 22. The first through hole 21 is for the nozzle 1 to pass through. The nozzle 1 has a mounting portion 11 that can be placed on the mounting surface 22. The portion of the nozzle 1 below the mounting portion 11 is below the mounting surface 22, and the portion above the mounting portion 11 is above the mounting surface 22.

[0040] Multiple limiting parts 3 are disposed on the mounting surface 22. At least two limiting parts 3 are located on both sides of the first through hole 21 along the first direction X, and at least two limiting parts 3 are located on both sides of the first through hole 21 along the second direction Y. The first direction X is perpendicular to the second direction Y, and both the first direction X and the second direction Y are parallel to the mounting surface 22. Preferably, the mounting surface 22 is parallel to the horizontal plane.

[0041] The limiting part 3 is used to limit the nozzle 1 in the first direction X and the second direction Y. Two second brackets 4 are connected to the opposite sides of the first bracket 2 respectively. The second brackets 4 are perpendicular to the first bracket 2. The first bracket 2 and the second brackets 4 are connected by adjusting screws (not shown), and the extension direction of the adjusting screws is perpendicular to the mounting surface 22.

[0042] By setting the first bracket 2 and the limiting part 3, the installation accuracy of the nozzle 1 can be ensured by directly mounting the nozzle 1 on the first bracket 2; by setting the second bracket 4 and the adjusting screw, the flatness of the nozzle 1 can be adjusted.

[0043] In this embodiment, such as Figure 7 As shown, the limiting part 3 includes a limiting pin 31 and a limiting block 32. At least one limiting pin 31 and at least one limiting block 32 are located on both sides of the first through hole 21 along the first direction X, and at least one limiting pin 31 and at least one limiting block 32 are located on both sides of the first through hole 21 along the second direction Y. A limiting pin 31 and a limiting block 32 constitute a limiting group, which can limit the nozzle 1 in the first direction X or the second direction Y to ensure the installation accuracy of the nozzle 1.

[0044] like Figure 7 As shown, among the two limiting pins 31 located above the first through hole 21 and the two limiting blocks 32 located to the right of the first through hole 21, the left limiting pin 31 and the upper limiting block 32 form a limiting group; the right limiting pin 31 and the limiting block 32 located below the first through hole 21 form a limiting group; and the lower limiting block 32 and the limiting pin 31 located below the first through hole 21 form a limiting group. That is, each nozzle 1 corresponds to three limiting groups.

[0045] In this embodiment, the length of the nozzle 1 in the first direction X is less than its length in the second direction Y. Preferably, one limiting pin 31 and one limiting block 32 are located on both sides of the first through hole 21 along the second direction Y; two limiting pins 31 and two limiting blocks 32 are located on both sides of the first through hole 21 along the first direction X, with one set of limiting pins 31 and limiting blocks 32 closer to one end of the first through hole 21 along the second direction Y, and the other set closer to the other end of the first through hole 21 along the second direction Y. That is, in the second direction Y, one limiting group is sufficient to ensure the installation accuracy of the nozzle 1; in the first direction X, two limiting groups are required to ensure the installation accuracy of the nozzle 1.

[0046] like Figure 9 and Figure 10As shown, the mounting part 11 has a first abutment edge 12 at the end away from the limiting block 32 in the first direction X, and the limiting pin 31 can abut against the first abutment edge 12. Further, the mounting part 11 has a second abutment edge 13 at the end away from the first through hole 21 in the second direction Y, and the limiting pin 31 can abut against the second abutment edge 13. Preferably, the mounting part 11 has two first abutment edges 12 and one second abutment edge 13.

[0047] like Figure 10 As shown, the mounting part 11 is provided with a first mounting hole 14; as Figure 12 As shown, the first bracket 2 has a second mounting hole 23 aligned with the first mounting hole 14. The first mounting hole 14 and the second mounting hole 23 are used for mounting fasteners (not shown), which are used to securely connect the nozzle 1 and the first bracket 2. The first bracket 2 also has a third mounting hole 24 for mounting a limiting pin 31 and a fourth mounting hole 25 for mounting a limiting block 32. The third mounting hole 24 can be a blind hole, and the fourth mounting hole 25 can be a through hole, facilitating the installation of the limiting pin 31 and the limiting block 32.

[0048] like Figure 12 As shown, the projection of the first bracket 2 onto the plane of the mounting surface 22 is rectangular. An adjusting screw is provided at each corner of the first bracket 2, and the four adjusting screws are independent of each other, thus allowing adjustment of the flatness of the nozzle 1. Specifically, the first bracket 2 may have fifth mounting holes 26 at each of the four corners for installing the adjusting screws. When the flatness of the nozzle 1 needs adjustment, one or more of the four adjusting screws can be selected for adjustment to change the horizontal position of the spray surface of the nozzle 1, thereby ensuring the flatness of the nozzle 1 meets the requirements.

[0049] like Figure 11 and Figure 12 As shown, the first bracket 2 has two first through holes 21, which are arranged at intervals along the first direction X. The distance between the two first through holes 21 is greater than the length of the limiting block 32 in the first direction X, so that the limiting block 32 will not interfere with the nozzle 1 and ensure that the nozzle 1 is installed smoothly.

[0050] like Figure 6 and Figure 8As shown, the mounting bracket 6 may also include a third bracket 5 perpendicular to the first bracket 2 and the second bracket 4. The third bracket 5 is fixedly connected to the two second brackets 4 and is located on one side of the first bracket 2 in the second direction Y, with the third bracket 5 spaced apart from the first bracket 2. The third bracket 5 allows the nozzle anti-collision mechanism to be connected to other power components, enabling the nozzle anti-collision mechanism to drive the nozzle 1 to move linearly back and forth in a horizontal direction (e.g., the first direction X) to spray UV adhesive onto the target adhesive application area of ​​the PCBA board, suitable for reliable encapsulation of low-profile PCBA boards. The adhesive application surface of the nozzle 1 is... Figure 9 The bottom surface.

[0051] Based on the same concept, this utility model also provides a PCBA board packaging device, as shown in the following embodiment. Since the principle of this PCBA board packaging device in solving the problem and the technical effects it can achieve are similar to those of the above-mentioned nozzle anti-collision mechanism, the implementation of this PCBA board packaging device can refer to the implementation of the above-mentioned nozzle anti-collision mechanism, and the repeated parts will not be described again.

[0052] One embodiment of this utility model also provides a PCBA board packaging device, including a nozzle 1 and a nozzle anti-collision mechanism as described in any of the above embodiments.

[0053] It should be noted that the moving components, worktable, and other parts (such as the control unit) of the PCBA board packaging equipment provided in this embodiment can be selected from any suitable existing structures. To clearly and concisely illustrate the technical solution provided in this embodiment, the above-mentioned parts will not be described in detail here, and the accompanying drawings have also been simplified accordingly. However, it should be understood that this embodiment is not limited in scope as a result.

[0054] It should be noted that in the description of this specification, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this specification, unless otherwise stated, "a plurality of" means two or more.

[0055] Any numerical values ​​cited herein include all values ​​ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or the value of a process variable (e.g., temperature, pressure, time, etc.) is described as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values ​​listed between the minimum and maximum values ​​are explicitly described in this specification in a similar manner.

[0056] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.

[0057] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0058] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0059] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed utility model subject matter.

Claims

1. A nozzle anti-collision mechanism for a PCBA board packaging equipment, characterized in that, include: A mounting bracket having a first through hole; the first through hole is for the nozzle to pass through; An anti-collision assembly is disposed around the mounting bracket. The anti-collision assembly includes a connecting plate, a sensor, and a movable plate. The connecting plate is fixedly connected to the mounting bracket. The sensor is fixedly disposed on the connecting plate and is electrically connected to a control unit that controls the movement of the nozzle. The movable plate is slidably connected to the side of the connecting plate away from the mounting bracket. An elastic element is provided between the movable plate and the connecting plate. The movable plate has a protective position and an alarm position. When the movable plate is in the protective position, it is subjected to the force of the elastic element and maintains a predetermined distance from the connecting plate in a predetermined direction. When the movable plate is in the alarm position, it can move inward relative to the connecting plate, the elastic element is compressed, and the sensor is triggered.

2. The showerhead collision avoidance mechanism of claim 1, wherein, The connecting plate is fixedly provided with a slide rail extending along the predetermined direction, and the moving plate is slidably connected to the slide rail by a slider; the connecting plate is also fixedly provided with a limiting post extending along the predetermined direction, and the moving plate is provided with a second through hole for the limiting post to pass through.

3. The showerhead collision avoidance mechanism of claim 2, wherein, The limiting post includes a connected column and a boss. The boss is located at the end of the column away from the connecting plate, and the diameter of the boss is greater than the diameter of the column. The second through hole includes a connected first part and a second part. The second part is located at the end of the first part away from the connecting plate. The diameter of the first part is greater than or equal to the diameter of the column, and the diameter of the first part is less than the diameter of the boss. The diameter of the second part is greater than or equal to the diameter of the boss, and the diameter of the second part is greater than the diameter of the first part.

4. The nozzle anti-collision mechanism according to claim 3, characterized in that, When the movable plate is in the protected position, the boss abuts against the stepped surface formed between the first part and the second part; the predetermined distance is equal to the length by which the limiting post protrudes from the connecting plate in the predetermined direction. The elastic element is sleeved outside the column.

5. The showerhead collision avoidance mechanism of claim 2, wherein, The movable plate includes two first plates and a second plate connected between the two first plates and connected to the ends of the first plates; the first plates extend along the predetermined direction, and the second plate extends along the horizontal direction, which is perpendicular to the predetermined direction; there are two slide rails located at both ends of the connecting plate in the horizontal direction, and the two first plates are slidably connected to the two slide rails respectively.

6. The showerhead collision avoidance mechanism of claim 5, wherein, There are two limiting posts, both located at the end of the connecting plate away from the mounting bracket, and the two limiting posts are spaced apart in the horizontal direction; the second plate is provided with two second through holes spaced apart in the horizontal direction.

7. The showerhead collision avoidance mechanism of claim 5, wherein, The sensor includes a body, a connector, and a roller. The body is fixedly connected to the connecting plate. One end of the connector is connected to the body, and the other end is connected to a rotatable roller. The axis of the roller is parallel to the horizontal direction. The connector is elastic. The roller is in contact with the end of the movable plate near the mounting bracket.

8. The nozzle anti-collision mechanism according to claim 7, characterized in that, There are two sensors, which are respectively connected to both sides of the connecting plate in the horizontal direction; the roller is in contact with the side of the first plate facing the mounting bracket.

9. The showerhead collision avoidance mechanism of claim 1, wherein, The projection of the mounting bracket in the horizontal plane is a rectangle; the number of anti-collision components is four, which are respectively set outside the four sides of the rectangle.

10. A PCBA board packaging apparatus, characterized by, Includes a nozzle and a nozzle anti-collision mechanism as described in any one of claims 1-9.

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