Automatic assembly machine and assembly method for mask lenses

Abstract

A mask lens automatic assembly machine and assembly method are disclosed. The assembly machine includes a machine body, a lens assembly module, and a manipulator. A conveyor line is provided on one side of the machine body. A profiling jig for fixing the mask is placed on the conveyor line. The manipulator is used to clamp the profiling jig from the conveyor line and deliver it to the lens assembly module. The lens assembly module includes a clamp for clamping the mask. A profiling support for fixing the lens is provided below the clamp. The lens corresponds to the frame of the mask. A deformable guide post is provided above the clamp. The deformable guide post passes through the clamp and presses the lens downward. A first cylinder is provided above the clamp. Under the action of the first cylinder, the clamp and the mask are moved downward to the lens position so that the lens is pressed into the frame. The present invention realizes automated lens assembly, saves labor costs, has high assembly accuracy, and good product consistency. The production cycle can be controlled by adjusting the conveyor line speed and the first cylinder speed, making the production speed quantifiable.

Description

Technical Field

[0001] The present invention relates to the technical field of protective equipment manufacturing, in particular to an automatic mask lens assembly machine and an assembly method. Background Art

[0002] Face masks are common protective gear, widely used in industries such as spray painting, agriculture, printing, chemicals, healthcare, and rescue operations. Functionally, face masks can be divided into two parts: respiratory protection for filtering smoke and toxins from the respiratory tract, and isolation protection for the face and eyes. The lens is a crucial component of isolation protection. During installation, the U-shaped groove of the lens must be positioned correctly within the frame to ensure a secure fit between the lens and the mask.

[0003] According to research, since most face masks are made of rubber / silicone and are soft, it is difficult to accurately position them using fixtures. Therefore, the lens installation process on existing domestic and foreign face mask production lines is all manual installation. The disadvantages of manual installation are: (1) production efficiency depends on the worker's technical maturity; (2) the accuracy of lens installation position and product consistency are difficult to grasp; (3) production rhythm is difficult to control. Therefore, it is necessary to design a better face mask lens assembly structure to solve the above problems. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a mask lens automatic assembly machine and assembly method, which have automated lens assembly process, high installation position accuracy, good product consistency, quantifiable production speed, and save labor costs.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A mask lens automatic assembly machine includes a body, the body is provided with a lens assembly module and a robot, a conveyor line is provided on one side of the body, a contour jig for fixing the mask is placed on the conveyor line, the robot is used to clamp the contour jig from the conveyor line and send it to the lens assembly module, the lens assembly module includes a clamp for clamping the mask, a contour support for fixing the lens is provided below the clamp, the lens corresponds to the frame of the mask, a deformable guide column is provided above the clamp, the deformable guide column passes through the clamp and presses the lens downward, a first cylinder is provided above the clamp, under the action of the first cylinder, the clamp and the mask move downward to the lens position so that the lens is pressed into the frame.

[0007] Furthermore, the clamp includes an upper clamp and a lower clamp, the upper clamp is provided with a first groove to accommodate the upper part of the mask, the upper clamp and the contour jig jointly clamp the mask, and the lower clamp is provided with a second groove for the contour jig to be clamped into position.

[0008] Furthermore, the upper clamp or the lower clamp is connected to a second cylinder, and the second cylinder drives the upper clamp or the lower clamp to move toward each other so that the two fit together and clamp the mask.

[0009] Furthermore, the clamp and the profiling jig are provided with profiling holes at positions corresponding to the deformable guide posts. The profiling holes are contoured to the frame, and the size of the profiling holes is larger than the size of the frame so that the deformable guide posts can pass through without interference.

[0010] Furthermore, guide shafts are provided around the clamp, and the guide shafts are installed on the body. The clamp and the mask fixed thereto move linearly along the guide shafts toward the lens.

[0011] Furthermore, the deformable guide column, the frame, the lens and the contoured support are coaxially arranged.

[0012] Furthermore, the deformable guide column includes an integral column portion in the upper section and a partition portion divided into multiple pieces in the lower section. The deformable guide column is provided with a through hole along its central axis, a guide rod is passed through the through hole, a diagonal brace is provided at the bottom of the guide rod, and a slope corresponding to the diagonal brace is provided at the lower section of the through hole. A third cylinder is connected to the top of the guide rod, and when the third cylinder drives the guide rod to move downward, the diagonal brace is supported against the slope to open the partition portion.

[0013] Furthermore, the outer contour size of the partition in the tightened state is smaller than the size of the frame, and the outer contour size of the partition in the opened state is the same as the outer contour size of the lens.

[0014] Furthermore, the third cylinder and the deformable guide post are installed on a fourth cylinder, and the fourth cylinder is installed on the machine body. The deformable guide post is driven by the fourth cylinder to move downward until it presses the lens.

[0015] An assembly method based on the above-mentioned automatic assembly machine for mask lenses, comprising:

[0016] The robot grips the profiling jig from the conveyor line and delivers it to the lens assembly module, and the profiling jig and the mask are fixed in the jig;

[0017] The outer contour size of the deformable guide post is smaller than the size of the frame in the retracted state, and passes through the clamp and the frame without interference, and then changes to the open state to press the lens downward;

[0018] The first cylinder pushes the clamp, the contour jig, and the mask to move toward the lens together. During the downward movement of the mask, the deformable guide column gradually opens the frame so that the size of the frame is equivalent to the size of the lens until the lens is pressed into the frame.

[0019] Beneficial effects of the present invention:

[0020] A robotic clamp secures a contoured jig with a mask attached to it for automated loading and unloading. A first pneumatic cylinder drives the clamp and mask downward, allowing the mask frame and lenses to be pressed together. Meanwhile, a deformable guide post passes through the clamp and mask frame during assembly, guiding and expanding the frame while also pressing the lenses downward. This invention enables automated lens assembly, saving labor costs, achieving high assembly precision and excellent product consistency. The production cycle can be controlled by adjusting the conveyor line speed and the speed of the first pneumatic cylinder, making production speed quantifiable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the automatic assembly machine for face mask lenses of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the lens assembly module in the automatic assembly machine for face mask lenses of the present invention;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0024] Figure 4 for Figure 2 Front view of

[0025] Figure 5 A cross-sectional view of the lens assembly module of the present invention;

[0026] Figure 6 This is a schematic structural diagram of the deformable guide post, guide rod and third cylinder in the lens assembly module of the present invention;

[0027] Figure 7 for Figure 6 sectional view of

[0028] Figure 8 is a three-dimensional diagram of a deformable guide post;

[0029] Figure 9 is a three-dimensional cross-sectional view of a deformable guide post;

[0030] Figure 10 for Figure 9 Front view of

[0031] In the figure, 1 is the body, 2 is the manipulator, 3 is the conveyor line, 4 is the profiling fixture, 5 is the mask, 6 is the frame, 7 is the lens, 8 is the profiling support, 9 is the deformable guide column, 10 is the first cylinder, 11 is the upper clamp, 12 is the first groove, 13 is the lower clamp, 14 is the second groove, 15 is the ear, 16 is the second cylinder, 17 is the profiling through hole, 18 is the guide shaft, 19 is the column part, 20 is the partition part, 21 is the through hole, 22 is the inclined surface, 23 is the guide rod, 24 is the diagonal support, 25 is the third cylinder, 26 is the fourth cylinder, 27 is the gap. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] like Figure 1 and Figure 2 The present invention provides an automatic mask lens assembly machine, comprising a machine body 1, the machine body 1 being provided with a lens assembly module and a manipulator 2, a conveyor line 3 being provided on one side of the machine body 1, a contour jig 4 for fixing a mask 5 being placed on the conveyor line 3, the manipulator 2 being used to clamp the contour jig 4 from the conveyor line 3 and deliver it to the lens assembly module, and the mask 5 and the lens 7 being assembled in the lens assembly module.

[0036] The lens assembly module includes a fixture for clamping the mask 5. A contoured support 8 for fixing the lens 7 is provided below the fixture. The lens 7 corresponds to the frame 6 of the mask 5. A deformable guide post 9 is provided above the fixture. The deformable guide post 9 passes through the fixture and presses the lens 7 downward. A first cylinder 10 is provided above the fixture. Under the action of the first cylinder 10, the fixture and the mask 5 move downward to the position of the lens 7 so that the lens 7 is pressed into the frame 6. Before the lens 7 and the frame 6 are assembled, the deformable guide post 9 passes through the contoured jig 4 and presses the lens 7. Then, the mask 5 and the contoured jig 4 move toward the lens 7. At this time, the frame 6 of the mask 5 is gradually expanded by the deformable guide post 9. After the mask 5 moves down to the lens 7 installation position, the size of the mask 5 frame 6 reaches the size of the lens 7. The mask 5 continues to move down, and the lens 7 is smoothly inserted into the frame 6, achieving the press-fitting of the lens 7 and the frame 6.

[0037] like Figures 2 to 5 Although the mask 5 has been fixed by the profiling jig 4, the mask 5 is elastic and may be elastically deformed in the opposite direction during its movement along the deformable guide post 9. Therefore, the mask 5 needs to be further fixed. In this embodiment, the lens assembly module is provided with a clamp, which includes an upper clamp 11 and a lower clamp 13. The upper clamp 11 is provided with a first groove 12 that is concave upward and is arc-shaped to accommodate the upper part of the mask 5. The upper clamp 11 and the profiling jig 4 jointly clamp the mask 5. The lower clamp 13 is provided with a second groove 14 for the profiling jig 4 to be snapped into place. In this embodiment, the lower clamp 13 is provided on both sides of the profiling jig 4, and the second grooves 14 are provided opposite to each other. When the profiling jig 4 is installed in the lower clamp 13, it is snapped inward from the edge of the second groove 14 and positioned. The upper clamp 11 or the lower clamp 13 is connected to a second cylinder 16, which drives the upper clamp 11 or the lower clamp 13 to move toward each other so that the two are in contact and clamp the mask 5. In this embodiment, the lower clamp 13 is provided with ears 15 on both sides, and the ears 15 are connected to the second cylinder 16. The second cylinder 16 pulls upward to drive the lower clamp 13 to move upward, thereby contacting the upper clamp 11 and clamping the mask 5, achieving the vertical positioning of the mask 5 and preventing the mask 5 from elastic deformation.

[0038] Preferably, the position of the clamp and the profiling jig 4 corresponding to the deformable guide column 9 is provided with a profiling through hole 17, and the profiling through hole 17 is contoured with the frame 6. The size of the profiling through hole 17 is larger than the size of the frame 6, so that the deformable guide column 9 does not interfere with the upper clamp 11, the lower clamp 13 and the profiling jig 4 when passing through.

[0039] Guide shafts 18 are vertically mounted around the fixture and are mounted on the body 1. Under the action of the first cylinder 10, the fixture and the fixed mask 5 move linearly along the guide shafts 18 toward the lens 7. The deformable guide post 9, the frame 6, the lens 7, and the contoured support 8 are coaxially arranged to ensure assembly accuracy.

[0040] The lens 7 is fixed to the contour support 8. Lens 7 can be fed by various methods, including but not limited to multi-axis robots, scara robots, delta robots, and manual feeding, which are not described in detail here. When the lens 7 is installed in the mask 5, it needs to be pressed firmly by the contour support 8 and the deformable guide post 9 to prevent displacement and inaccurate assembly.

[0041] like Figures 5 to 10 The deformable guide post 9 is formed by processing spring steel or other elastic materials. The deformable guide post 9 includes a columnar portion 19 integrally provided at the upper section and a partition portion 20 divided into multiple pieces at the lower section. There is a gap 27 between adjacent partition portions 20. In this embodiment, the partition portion 20 is evenly divided in the circumferential direction of the columnar portion 19. In other embodiments, the partition portion 20 can be unevenly divided according to changes in structural stress. The deformable guide post 9 is provided with a through hole 21 running through the upper and lower sides along its central axis. A guide rod 23 is passed through the through hole 21. A diagonal brace 24 is provided at the bottom of the guide rod 23. The lower section of the through hole 21 is provided with an inclined surface 22 corresponding to the diagonal brace 24. The top of the guide rod 23 is connected to a third cylinder 25. When the third cylinder 25 drives the guide rod 23 to move downward, the diagonal brace 24 is supported on the inclined surface 22 to open the partition portion 20. The third cylinder 25 and the deformable guide column 9 are installed on the fourth cylinder 26. In this embodiment, the fourth cylinder 26 is a rodless cylinder. The fourth cylinder 26 is installed on the body 1. The deformable guide column 9 is driven by the fourth cylinder 26 to move downward until it presses the lens 7, so that the lens 7 is stably positioned during the assembly process and will not shift, thereby ensuring the installation accuracy.

[0042] Because the lens 7 is surrounded by a U-shaped groove, its outer contour is larger than that of the frame 6. Therefore, when the divider 20 of the deformable guide post 9 is tightened, its outer contour is smaller than that of the frame 6, so that it does not cause structural interference when passing downward through the mask 5 and the profiling jig 4. When the divider 20 is opened, its outer contour is the same as that of the lens 7. During the installation process, the deformable guide post 9 serves as a guide, and the deformable guide post 9 opens the frame 6 so that the lens 7 can be smoothly inserted into the frame 6. The bottom of the deformable guide post 9 conforms to the shape of the lens 7, and can fit the inner side of the U-shaped groove of the lens 7 to press the lens 7 tightly.

[0043] The present invention also provides an assembly method of a mask lens automatic assembly machine, comprising:

[0044] Robot 2 picks up the profiling jig 4 from conveyor line 3 and delivers it to the lens assembly module. The profiling jig 4 and mask 5 are secured within the jig. Specifically, the profiling jig 4 engages the lower jig 13 through the second groove 14. The second cylinder 16 then drives the lower jig 13 toward the upper jig 11 until the upper and lower jigs 11 and 13 engage, pressing against the mask 5 and securing it in place.

[0045] When the deformable guide post 9 is in the retracted state, its outer contour is smaller than that of the frame 6, and it passes through the fixture and the frame 6 without interference. At this time, the guide rod 23 does not move downward. Then, the third cylinder 25 drives the guide rod 23 to move downward so that the diagonal support 24 of the guide rod 23 pushes open the inclined surface 22 of the partition 20, so that the deformable guide post 9 becomes open and moves downward under the action of the fourth cylinder 26 to press the lens 7.

[0046] The first cylinder 10 pushes the clamp, the contour jig 4, and the mask 5 to move toward the lens 7. During the downward movement of the mask 5, the deformable guide column 9 gradually opens the frame 6 so that the size of the frame 6 is equivalent to the size of the lens 7, until the lens 7 is pressed into the frame 6, completing the press-fitting of the lens 7.

[0047] The automatic assembly machine for face mask lenses of the present invention and the assembly process can be fully automated. By controlling the start, stop, and stroke of the first cylinder 10, the second cylinder 16, the third cylinder 25, and the fourth cylinder 26, the automatic press-fitting operation of the lens 7 and the face mask 5 can be achieved, thus automating the lens 7 assembly process. The robot 2 is used to automatically load and unload the face mask 5. The lens 7 and the face mask 5 are installed by press-fitting, which ensures high precision in the installation position of the lens 7 and good product consistency. The deformable guide pillars 9 are used to guide and expand the frame 6 during the assembly process. The lens 7 is pressed before assembly, ensuring stable positioning and preventing displacement during the assembly process. During the installation process, the frame 6 is stretched open so that the lens 7 can be smoothly inserted into the frame 6. The production rhythm of the present invention can be controlled by adjusting the speed of the conveyor line 3 and the speed of each cylinder. The production speed can be quantified, and no manual operation is required, which saves labor costs and improves work efficiency. The equipment construction of the automatic assembly machine for face mask lenses of the present invention has been completed and the operation effect is good.

[0048] The present invention is also applicable to other assembly scenarios of flexible materials and hard materials.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be covered by the scope of the claims of the present invention.

Claims

1. A mask lens automatic assembly machine, characterized in that: The invention comprises: a machine body, wherein the machine body is provided with a lens assembly module and a manipulator, a conveyor line is provided on one side of the machine body, a profiling jig for fixing a mask is placed on the conveyor line, the manipulator is used to clamp the profiling jig from the conveyor line and send it to the lens assembly module, the lens assembly module comprises a clamp for clamping the mask, a profiling support for fixing the lens is provided below the clamp, the lens corresponds to the frame of the mask, a deformable guide post is provided above the clamp, the deformable guide post passes through the clamp and presses the lens downward, a first cylinder is provided above the clamp, under the action of the first cylinder, the clamp and the mask move downward to the lens position so that the lens is pressed into the frame; The clamp includes an upper clamp and a lower clamp, the upper clamp is provided with a first groove to accommodate the upper part of the mask, the upper clamp and the contour jig jointly clamp the mask, and the lower clamp is provided with a second groove for the contour jig to be clamped and positioned; The upper clamp or the lower clamp is connected to a second cylinder, and the second cylinder drives the upper clamp or the lower clamp to move toward each other so that the two are fitted together to clamp the mask; The deformable guide column includes an upper integral column portion and a lower partition portion divided into multiple pieces. The deformable guide column is provided with a through hole along its central axis. A guide rod is passed through the through hole. A diagonal brace is provided at the bottom of the guide rod. The lower section of the through hole is provided with an inclined surface corresponding to the diagonal brace. The top of the guide rod is connected to a third cylinder. When the third cylinder drives the guide rod to move downward, the diagonal brace is supported against the inclined surface to open the partition portion. The outer contour size of the partition in a tightened state is smaller than the size of the frame, and the outer contour size of the partition in an open state is the same as the outer contour size of the lens.

2. The automatic mask lens assembly machine according to claim 1, characterized in that: The clamp and the profiling jig are provided with profiling through holes at positions corresponding to the deformable guide posts. The profiling through holes are contoured to the frame, and the size of the profiling through holes is larger than the size of the frame, so that the deformable guide posts can pass through without interference.

3. The automatic mask lens assembly machine according to claim 1, characterized in that: The fixture is provided with guide shafts around it, and the guide shafts are installed on the machine body. The fixture and the mask fixed thereto move linearly toward the lens along the guide shafts.

4. The automatic mask lens assembly machine according to claim 1, characterized in that: The deformable guide column, the mirror frame, the lens and the contoured support are coaxially arranged.

5. The automatic mask lens assembly machine according to claim 4, characterized in that: The third cylinder and the deformable guide post are installed on the fourth cylinder, and the fourth cylinder is installed on the machine body. The deformable guide post is driven by the fourth cylinder to move downward until it presses the lens.

6. An assembly method based on the automatic assembly machine for mask lenses according to claim 1, characterized in that: include: The robot grips the profiling jig from the conveyor line and delivers it to the lens assembly module, and the profiling jig and the mask are fixed in the jig; The outer contour size of the deformable guide post is smaller than the size of the frame in the retracted state, and passes through the clamp and the frame without interference, and then changes to the open state to press the lens downward; The first cylinder pushes the clamp, the contour jig, and the mask to move toward the lens together. During the downward movement of the mask, the deformable guide column gradually opens the frame so that the size of the frame is equivalent to the size of the lens until the lens is pressed into the frame.

Images