FPC flexible board and loudspeaker automatic welding device

Abstract

This invention discloses an automatic welding device for FPC flexible boards and speakers, specifically relating to the field of automatic welding technology. It includes a welding platform, a controller, a laser welding head, and a dynamically adjustable heat insulation mechanism. The dynamically adjustable heat insulation mechanism comprises an adjusting motor, a rotating block, an adjusting slide frame, an adjusting slide shaft, a pressure block, a small heat insulation zone frame, a medium heat insulation zone frame, and a large heat insulation zone frame. This invention employs a dynamically adjustable heat insulation mechanism, which has the advantage of dynamically adjusting the heat insulation area for automatic welding of FPC flexible boards and speakers of different models as needed. This solves the problem that due to structural differences between different models of FPC and speakers—differences in weld point layout, material thickness, and heat capacity parameters—the required heat insulation control area cannot be standardized, making it difficult to dynamically adjust the heat insulation area for automatic welding of FPC flexible boards and speakers as needed.

Description

Technical Field

[0001] This invention relates to the field of automatic welding technology, and more specifically, to an automatic welding device for FPC flexible boards and speakers. Background Technology

[0002] The automatic welding equipment for FPC flexible boards and speakers is mainly used in the manufacturing of FPC flexible boards and speakers. Its core purpose can be summarized as improving production efficiency. By automating welding, it replaces manual welding, realizes continuous welding of FPC flexible boards and speakers, greatly shortens the production cycle, and meets the demand for high production capacity.

[0003] A search of existing published literature revealed that Chinese Patent Publication No. CN114131195A discloses a laser welding device for electronic components. This device can automatically clamp and fix the circuit board using clamping blocks, and can also automatically adjust the position of electronic components to facilitate pin insertion into pin holes for welding. Furthermore, it can automatically remove and collect the welded electronic components, eliminating manual operation steps, saving time, and improving welding efficiency. However, this device still has the following problems.

[0004] During the automated welding process of FPC flexible boards and speaker components, the high temperature of the welding laser head can cause molten metal to sputter. This high-temperature sputtering has random diffusion characteristics, spreading to sensitive areas such as FPC circuits, speaker diaphragms, and voice coils, leading to problems such as insulation carbonization, short circuits, or deformation of acoustic components. Due to the structural differences between different models of FPC and speakers, the differences lie in the layout of the solder joints, material thickness, and heat capacity parameters. The required heat insulation control area cannot be unified, making it difficult to dynamically adjust the heat insulation area of ​​the automated welding of FPC flexible boards and speakers as needed. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides the following technical solution: an automatic welding device for FPC flexible boards and speakers, comprising a welding platform and a controller, wherein a laser welding head is provided above the welding platform, and a dynamic adjustment heat insulation mechanism is provided on one side of the laser welding head; the dynamic adjustment heat insulation mechanism includes an adjustment motor disposed on one side of the laser welding head, and a rotating block is coaxially and fixedly connected to the output end of the adjustment motor; an adjustment slide frame is fixedly connected to one end of the rotating block; an adjustment slide shaft is slidably connected to the inner wall of the adjustment slide frame and located on one side of the rotating block; a pressure block is fixedly installed at one end of the adjustment slide shaft; a small heat insulation zone frame is fixedly installed on one side of the pressure block; a medium heat insulation zone frame is provided outside the small heat insulation zone frame; and a large heat insulation zone frame is provided outside the medium heat insulation zone frame.

[0006] Preferably, the outer wall of the adjusting slide shaft and the inner wall of the adjusting slide frame are both smooth surfaces, and the vertical cross-section of the adjusting slide shaft is circular. The controller is electrically connected to the adjusting motor. The small, medium, and large heat insulation zones are all made of aluminum nitride ceramic. The inner wall diameter of the medium-sized heat insulation zone is larger than that of the small heat insulation zone, and the inner wall diameter of the large heat insulation zone is larger than that of the medium-sized heat insulation zone. The lower surface of the large heat insulation zone is at the same level as the lower surface of the small heat insulation zone, the lower surface of the medium-sized heat insulation zone is lower than that of the small heat insulation zone, and the lower surface of the medium-sized heat insulation zone is lower than that of the large heat insulation zone. A support column is fixedly connected to the top of the adjusting motor. A reinforcing column is provided on one side of the support column, and the bottom end of the reinforcing column is fixedly connected to the medium-sized heat insulation zone frame. A support ring is fixedly installed at the top of the reinforcing column. The laser welding head and the support column are both fixedly connected to the support ring, and the laser welding head is electrically connected to the controller. Sliding rings are slidably connected to both sides of the adjusting slide frame. Both sliding rings are fixedly connected to the adjusting slide shaft, and the sliding rings are slidably connected to the pressure block.

[0007] When using this technology, if a medium-sized heat insulation frame is required (i.e., the first type of FPC flexible board and speaker), the adjusting motor remains stationary. If a small heat insulation frame is required (i.e., the second type of FPC flexible board and speaker), the adjusting motor drives the rotating block to rotate clockwise. This causes the adjusting slide frame to move downwards, and the adjusting rod drives the L-shaped connecting block to move the large heat insulation frame upwards. The adjusting slide shaft then drives two sliding rings to slide along the adjusting slide frame. The adjusting slide shaft causes the pressure block to move downwards, and the small heat insulation frame slides downwards along the outer wall of the laser welding head. The pressure block causes the small heat insulation frame to move downwards synchronously with the laser welding head, thus covering the small heat insulation area of ​​the laser welding head's welding point.

[0008] Preferably, an adjusting rod is slidably connected to the inner wall of the adjusting slide frame near the large heat insulation zone frame. Two sliding support rings are fixedly connected to the outer wall of the adjusting rod. An L-shaped connecting block is fixedly installed at one end of the adjusting rod, and a gap is provided between the L-shaped connecting block and one of the sliding support rings. The L-shaped connecting block is fixedly connected to the large heat insulation zone frame.

[0009] The vertical cross-section of the L-shaped connecting block is L-shaped, and the two sliding support rings are symmetrically arranged about the adjusting rod. The outer wall of the adjusting rod and the inner wall of the adjusting slide frame are both smooth surfaces.

[0010] When this technology is used, if a large heat insulation zone frame is required, that is, the third type of FPC flexible board and speaker, the controller starts the adjustment motor, the rotating block drives the adjustment slide frame to rotate counterclockwise, the adjustment rod and sliding support ring slide along the outer wall of the adjustment slide frame, and at the same time the adjustment rod drives the L-shaped connecting block to move down, and the large heat insulation zone frame moves down, and the large heat insulation zone frame covers the position of the large heat insulation area.

[0011] This allows the lower surface of the large insulation zone frame to be lower than the lower surface of the medium insulation zone frame.

[0012] Preferably, a concave sliding strip is fixedly connected to one side of the inner wall of the large heat insulation zone frame, and a concave guide strip is fixedly installed on one side of the outer wall of the small heat insulation zone frame. Both the concave guide strip and the concave sliding strip are slidably connected to the medium-sized heat insulation zone frame. A pressing strip is provided on one side of the concave sliding strip, and the pressing strip is fixedly connected to the large heat insulation zone frame. A positioning pressing strip is provided on one side of the concave guide strip, and the positioning pressing strip is fixedly connected to the small heat insulation zone frame.

[0013] A sensing block is provided on one side of the concave guide strip, and a pressure sensor is fixedly installed at the bottom of the sensing block. The pressure sensor is fixedly connected to the medium-sized heat insulation zone frame and is used to sense the pressure of the sensing block. The vertical cross-sectional shape of both the concave guide strip and the concave slide is concave, and a gap is provided between the pressing strip and the positioning strip.

[0014] In operation, this technology involves a small heat-insulating frame moving a concave guide strip downwards, simultaneously causing the positioning pressure strip to move downwards. This pressure is applied to the sensing block, which then presses against the pressure sensor. Once the pressure sensor detects the pressure value, the controller shuts off the adjusting motor. Alternatively, a large heat-insulating frame moves the pressure strip downwards, causing the sensing block to press against the pressure sensor. Once the pressure sensor detects the pressure, the controller shuts off the adjusting motor.

[0015] Preferably, a positioning slide plate is fixedly installed at the top of the laser welding head, and a base plate is inserted into the bottom of the welding platform; an electric cylinder is installed on the upper surface of the positioning slide plate, a sliding guide plate is fixedly connected to one side of the electric cylinder, the sliding guide plate is slidably connected to the positioning slide plate, a sleeve slider is fixedly installed on one side of the sliding guide plate, a transmission screw is threadedly connected to the inner wall of the sleeve slider, a support groove frame is slidably installed on the outer wall of the sleeve slider, and the support groove frame is fixedly connected to the base plate; a transmission motor is fixedly installed on one side of the inner wall of the support groove frame, the transmission motor is used to drive the transmission screw to rotate, the controller is fixed on one side of the support groove frame, and both the electric cylinder and the transmission motor are electrically connected to the controller.

[0016] The technical effects and advantages of this invention are as follows:

[0017] 1. This invention employs a dynamically adjustable heat insulation mechanism. When a medium-sized heat insulation frame is required, i.e., the first type of FPC flexible board and speaker, the adjusting motor remains stationary, and the high-temperature sputtered material will undergo dynamic heat insulation through the medium-sized heat insulation frame. When a small heat insulation frame is required, i.e., the second type of FPC flexible board and speaker, the adjusting motor drives the rotating block to rotate clockwise, and the adjusting slide frame causes the adjusting slide shaft to move downward. The adjusting slide shaft will drive the pressure block to move downward, and the pressure block will drive the small heat insulation frame to move downward. The lower surface of the small heat insulation frame can be lower than the lower surface of the medium heat insulation frame. The small heat insulation frame provides small-area heat insulation for the high-temperature sputtered material, preventing the high temperature from spreading to other areas. Different types of FPC flexible boards and speakers can be dynamically adjusted and unified according to the required heat insulation control area. The heat insulation area of ​​the FPC flexible board and speaker can be dynamically adjusted as needed for automatic welding.

[0018] 2. When the required component of this invention is a large heat insulation frame, namely the third type of FPC flexible board and speaker, the adjusting motor drives the rotating block to rotate counterclockwise, the adjusting slide frame drives the adjusting rod to move down, the adjusting rod and the sliding support ring slide along the outer wall of the adjusting slide frame, the L-shaped connecting block causes the large heat insulation frame to move down, and at the same time the large heat insulation frame moves downward, the large heat insulation frame covers the position of the large heat insulation area, and the high temperature sputtering isolation of the large area is achieved through the large heat insulation frame, and the heat insulation area of ​​the FPC flexible board and speaker can be dynamically adjusted as needed for automatic welding.

[0019] 3. When a small heat insulation frame is required, the small heat insulation frame moves the concave guide strip downwards, and the small heat insulation frame moves the positioning pressure strip downwards. The positioning pressure strip presses down on the sensing block, and the pressure sensor detects the pressure value, then the controller shuts off the adjustment motor. When a large heat insulation frame is required, the large heat insulation frame moves the concave slide strip downwards, and the large heat insulation frame moves the pressure strip downwards. The sensing block presses against the pressure sensor, then the controller shuts off the adjustment motor. In this way, the dynamic adjustment of both small and large heat insulation frames can be precisely achieved using a single pressure sensor. Therefore, only one pressure sensor is needed to achieve dynamic adjustment of different models, significantly saving the sensing cost of dynamic adjustment.

[0020] The interaction of these multiple functions allows for dynamic adjustment of the insulation zone. When a medium-sized insulation zone frame is required, i.e., the first type of FPC flexible panel and speaker, the adjusting motor remains stationary. Simultaneously, when a small insulation zone frame is selected, its lower surface can be dynamically adjusted to be lower than the lower surface of the medium-sized insulation zone frame. Conversely, when a large insulation zone frame is selected, the L-shaped connecting block lowers the large insulation zone frame, ensuring its lower surface is lower than the lower surface of the medium-sized frame. In summary, different types of FPC flexible panels and speakers can be dynamically adjusted and unified according to the required insulation control area, enabling dynamic adjustment of the automatically welded insulation area of ​​the FPC flexible panel and speaker as needed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the automatic welding device for FPC flexible board and speaker of the present invention.

[0022] Figure 2 This is a schematic diagram of a partial cut-off structure at the connection between the support ring and the positioning slide plate of the present invention.

[0023] Figure 3 This is a partial structural diagram of the vertical section cut at the connection between the medium-sized heat insulation zone frame and the reinforcing column of the present invention.

[0024] Figure 4 This is a partial structural schematic diagram of the connection between the adjusting slide shaft and the pressure block of the present invention.

[0025] Figure 5 This is a schematic diagram of a partial cut-off structure at the connection between the L-shaped connecting block and the large heat insulation zone frame of the present invention.

[0026] Figure 6 This is a partial structural schematic diagram of the connection between the medium-sized heat insulation zone frame and the reinforcing column of the present invention.

[0027] Figure 7 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0028] Figure 8 This is a partial front view structural diagram of the connection between the support slot frame and the drive motor of the present invention.

[0029] Figure 9 This is a top view of the automatic welding device for FPC flexible board and speaker of the present invention.

[0030] The attached diagram is labeled as follows: 1. Welding platform; 2. Laser welding head; 3. Adjusting motor; 4. Rotating block; 5. Adjusting slide frame; 6. Adjusting slide shaft; 7. Pressure block; 8. Small insulation zone frame; 9. Medium insulation zone frame; 10. Large insulation zone frame; 11. Support column; 12. Reinforcing column; 13. Support ring; 14. Sliding ring; 15. Adjusting rod; 16. Sliding support ring; 17. L-shaped connecting block; 18. Concave slide bar; 19. Concave guide bar; 20. Pressing bar; 21. Positioning pressure bar; 22. Sensor block; 23. Pressure sensor; 24. Positioning slide plate; 25. Base plate; 26. Electric cylinder; 27. Sliding guide plate; 28. Sleeve slider; 29. ​​Transmission screw; 30. Transmission motor; 31. Support groove frame; 32. Controller. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1-9 The present invention relates to an automatic welding device for FPC flexible panels and horns. The device is equipped with a dynamic heat-adjusting mechanism. The dynamic heat-adjusting mechanism can dynamically adjust the heat-insulating area of ​​different models of FPC flexible panels and horns according to the required heat-insulating control area. The specific structural settings of the dynamic heat-adjusting mechanism are as follows.

[0033] In this embodiment, as Figure 1 - Figure 4 As shown, a laser welding head 2 is provided above the welding platform 1, and a dynamic adjustment heat insulation mechanism is provided on one side of the laser welding head 2. The dynamic adjustment heat insulation mechanism includes an adjustment motor 3 provided on one side of the laser welding head 2, and a rotating block 4 is coaxially and fixedly connected to the output end of the adjustment motor 3. An adjustment slide frame 5 is fixedly connected to one end of the rotating block 4. An adjustment slide shaft 6 is slidably connected to the inner wall of the adjustment slide frame 5 and located on one side of the rotating block 4. A pressure block 7 is fixedly installed at one end of the adjustment slide shaft 6.

[0034] A small heat insulation frame 8 is fixedly installed on one side of the pressure block 7. A medium-sized heat insulation frame 9 is provided outside the small heat insulation frame 8, and a large heat insulation frame 10 is provided outside the medium-sized heat insulation frame 9. The outer wall of the adjusting slide shaft 6 and the inner wall of the adjusting slide frame 5 are both smooth surfaces, and the vertical cross-section of the adjusting slide shaft 6 is circular. The controller 32 is electrically connected to the adjusting motor 3. The small heat insulation frame 8, the medium-sized heat insulation frame 9, and the large heat insulation frame 10 are all made of aluminum nitride ceramic. The inner diameter of the medium-sized heat insulation frame 9 is larger than that of the small heat insulation frame 8, and the inner diameter of the large heat insulation frame 10 is larger than that of the medium-sized heat insulation frame 9. The lower surface of the large heat insulation frame 10 is at the same level as the lower surface of the small heat insulation frame 8, the lower surface of the medium-sized heat insulation frame 9 is lower than that of the small heat insulation frame 8, and the lower surface of the medium-sized heat insulation frame 9 is lower than that of the large heat insulation frame 10.

[0035] In this embodiment, as Figure 3 - Figure 6 As shown, a support column 11 is fixedly connected to the top of the adjusting motor 3. A reinforcing column 12 is provided on one side of the support column 11. The bottom end of the reinforcing column 12 is fixedly connected to the medium-sized heat insulation zone frame 9. A support ring 13 is fixedly installed at the top of the reinforcing column 12. Both the laser welding head 2 and the support column 11 are fixedly connected to the support ring 13. The laser welding head 2 is electrically connected to the controller 32 so that the positioning slide plate 24 can drive the laser welding head 2 to move down, and the laser welding head 2 can drive the support ring 13 to move down, the support ring 13 can drive the reinforcing column 12 to move down, and the reinforcing column 12 can drive the medium-sized heat insulation zone frame 9 to move down, facilitating linkage movement. Sliding rings 14 are slidably connected to both sides of the adjusting slide frame 5. Both sliding rings 14 are fixedly connected to the adjusting slide shaft 6. The sliding rings 14 are slidably connected to the pressure block 7 so that the adjusting slide shaft 6 can drive the two sliding rings 14 to slide along the adjusting slide frame 5, ensuring that the adjusting slide shaft 6 can stably achieve sliding operation.

[0036] In this embodiment, as Figure 5 As shown, an adjusting rod 15 is slidably connected to the inner wall of the adjusting slide frame 5 near the large heat insulation zone frame 10. Two sliding support rings 16 are fixedly connected to the outer wall of the adjusting rod 15. An L-shaped connecting block 17 is fixedly installed at one end of the adjusting rod 15, and a gap is provided between the L-shaped connecting block 17 and one of the sliding support rings 16. The L-shaped connecting block 17 is fixedly connected to the large heat insulation zone frame 10. The vertical cross-section of the L-shaped connecting block 17 is L-shaped, and the two sliding support rings 16 are symmetrically arranged about the adjusting rod 15. Both the outer wall of the adjusting rod 15 and the inner wall of the adjusting slide frame 5 are smooth surfaces.

[0037] In this embodiment, as Figure 7As shown, a concave slide bar 18 is fixedly connected to one side of the inner wall of the large heat insulation zone frame 10, and a concave guide bar 19 is fixedly installed on one side of the outer wall of the small heat insulation zone frame 8. Both the concave guide bar 19 and the concave slide bar 18 are slidably connected to the medium heat insulation zone frame 9. A pressing strip 20 is provided on one side of the concave slide bar 18, and the pressing strip 20 is fixedly connected to the large heat insulation zone frame 10. A positioning pressing strip 21 is provided on one side of the concave guide bar 19, and the positioning pressing strip 21 is fixedly connected to the small heat insulation zone frame 8.

[0038] A sensing block 22 is provided on one side of the concave guide strip 19, and a pressure sensor 23 is fixedly installed at the bottom end of the sensing block 22. The pressure sensor 23 is fixedly connected to the medium-sized heat insulation zone frame 9, and the pressure sensor 23 is used to sense the pressure of the sensing block 22. The vertical cross-sectional shape of both the concave guide strip 19 and the concave slide strip 18 is concave, and there is a gap between the pressing strip 20 and the positioning pressing strip 21.

[0039] In this embodiment, as Figure 8 - Figure 9 As shown, a positioning slide plate 24 is fixedly installed on the top of the laser welding head 2, and a base plate 25 is inserted into the bottom of the welding platform 1; an electric cylinder 26 is installed on the upper surface of the positioning slide plate 24, a sliding guide plate 27 is fixedly connected to one side of the electric cylinder 26, the sliding guide plate 27 is slidably connected to the positioning slide plate 24, a sleeve slider 28 is fixedly installed on one side of the sliding guide plate 27, a transmission screw 29 is threadedly connected to the inner wall of the sleeve slider 28, and a support groove frame 31 is slidably installed on the outer wall of the sleeve slider 28, the support groove frame 31 is fixedly connected to the base plate 25.

[0040] A drive motor 30 is fixedly installed on one side of the inner wall of the support slot frame 31. The drive motor 30 is used to drive the drive screw 29 to rotate. The controller 32 is fixed on one side of the support slot frame 31. The electric cylinder 26 and the drive motor 30 are both electrically connected to the controller 32 so that the drive screw 29 can be driven by the drive motor 30. The drive screw 29 drives the sleeve slider 28 to move under the action of the thread transmission force. The sleeve slider 28 drives the sliding guide plate 27 to move along the support slot frame 31. The electric cylinder 26 causes the positioning slide plate 24 to move, so as to realize the adjustment operation of the horizontal and vertical area position of the laser welding head 2.

[0041] The working principle of the automatic welding device for FPC flexible boards and speakers of this invention is as follows:

[0042] First, during welding preparation, the FPC flexible board and the speaker are placed in the welding platform 1 groove for installation. The welding platform 1 is supported by the base plate 25, which also supports the support groove frame 31, increasing the stability of the support groove frame 31. The transmission motor 30 drives the transmission screw 29, which in turn moves the sleeve slider 28 under the action of threaded transmission force. The sleeve slider 28 moves the sliding guide plate 27 along the support groove frame 31. At the same time, the sliding guide plate 27 moves the support electric cylinder 26, which in turn moves the positioning slide plate 24. The positioning slide plate 24 moves the laser welding head 2. When the laser welding head 2 reaches the welding point between the FPC flexible board and the speaker, the controller 32 shuts off the transmission motor 30.

[0043] Secondly, when performing medium-sized dynamic adjustment heat insulation welding according to this invention, please refer to the following for the moving direction. Figure 3 When the required component is a medium-sized heat insulation frame 9, which is the first type of FPC flexible board and speaker, the adjusting motor 3 remains stationary. Since the lower surface of the medium-sized heat insulation frame 9 is lower than the lower surfaces of the small heat insulation frame 8 and the large heat insulation frame 10, the positioning slide plate 24 is pushed down by the electric cylinder 26. The positioning slide plate 24 drives the laser welding head 2 down, and the laser welding head 2 drives the support ring 13 down. The support ring 13 drives the reinforcing column 12 down, and the reinforcing column 12 drives the medium-sized heat insulation frame 9 down. The medium-sized heat insulation frame 9 covers the medium-sized heat insulation area of ​​the welding point of the laser welding head 2. The first type of FPC flexible board and speaker are directly welded by the laser welding head 2. The high-temperature sputtered material will pass through the medium-sized heat insulation frame 9 to provide dynamic heat insulation in the medium-sized heat insulation area.

[0044] Meanwhile, when performing small-scale dynamic adjustment of heat insulation welding according to this invention, please refer to the following for the direction of movement. Figure 3 When a small heat insulation zone frame 8 is required, which is the second type of FPC flexible board and speaker, the controller 32 starts the adjustment motor 3, which drives the rotating block 4 to rotate clockwise. The rotating block 4 drives the adjustment slide frame 5 to rotate clockwise, and the adjustment slide frame 5 causes the adjustment slide shaft 6 to move downward. The adjustment slide frame 5 will drive the adjustment rod 15 to move upward. The adjustment rod 15 drives the L-shaped connecting block 17 to move the large heat insulation zone frame 10 upward. At the same time, the adjustment slide shaft 6 drives the two sliding rings 14 to slide along the adjustment slide frame 5.

[0045] Adjusting the sliding shaft 6 will cause the pressure block 7 to move downwards, which in turn causes the small heat insulation zone frame 8 to move downwards. The small heat insulation zone frame 8 then slides downwards along the outer wall of the laser welding head 2. Simultaneously, the small heat insulation zone frame 8 causes the concave guide strip 19 to move downwards, sliding down along the inner wall of the medium heat insulation zone frame 9. At the same time, the small heat insulation frame 8 causes the positioning pressure strip 21 to move downwards, pressing it against the sensing block 22. After being subjected to force, the sensing block 22 presses against the pressure sensor 23. The pressure sensor 23 senses the pressure value and then shuts off the adjusting motor 3 via the controller 32. In this way, the lower surface of the small heat insulation frame 8 can be lower than the lower surface of the medium heat insulation frame 9. The positioning slide plate 24 is pushed down by the electric cylinder 26. The positioning slide plate 24 drives the laser welding head 2 to move down. The laser welding head 2 drives the support ring 13 to move the support column 11 down. The support column 11 drives the adjusting motor 3 to move the adjusting slide frame 5 down. The adjusting slide frame 5 drives the adjusting slide shaft 6 to move the pressure block 7 down. The pressure block 7 drives the small heat insulation frame 8 to move down synchronously with the laser welding head 2. In this way, the small heat insulation frame 8 covers the small heat insulation area of ​​the welding point of the laser welding head 2. The second type of FPC flexible board and the speaker are welded by the laser welding head 2. The small heat insulation frame 8 can provide small-area heat insulation for the high-temperature sputtered material and prevent the high temperature from spreading to other areas.

[0046] Meanwhile, when performing large-scale dynamic adjustment heat insulation welding according to this invention, please refer to the following for the moving direction. Figure 3 - Figure 5 When a large heat insulation frame 10 is required, which is the third type of FPC flexible board and speaker, the controller 32 starts the adjustment motor 3. The adjustment motor 3 drives the rotating block 4 to rotate counterclockwise. The rotating block 4 drives the adjustment slide frame 5 to rotate counterclockwise. The adjustment slide frame 5 drives the adjustment rod 15 to move down. The adjustment rod 15 and the sliding support ring 16 slide along the outer wall of the adjustment slide frame 5. At the same time, the adjustment rod 15 drives the L-shaped connecting block 17 to move down. The L-shaped connecting block 17 causes the large heat insulation frame 10 to move down. The adjustment slide shaft 6 drives the pressure block 7 to move up. The pressure block 7 drives the small heat insulation frame 8 to move up along the outer wall of the laser welding head 2. At the same time, the large heat insulation zone frame 10 drives the concave slide bar 18 to move down. The concave slide bar 18 slides down along the inner wall of the medium heat insulation zone frame 9. At the same time, the large heat insulation zone frame 10 drives the pressing bar 20 to move down. The pressing bar 20 presses against the sensing block 22. The sensing block 22 presses against the pressure sensor 23. After the pressure sensor 23 senses the pressure, it shuts down the adjusting motor 3 through the controller 32.

[0047] In this way, the lower surface of the large heat insulation frame 10 can be lower than the lower surface of the medium heat insulation frame 9. Then, the controller 32 starts the electric cylinder 26, which pushes the positioning slide plate 24 to move down. The positioning slide plate 24 drives the laser welding head 2 to move down, the laser welding head 2 drives the support ring 13 to move down, the support ring 13 drives the support column 11 to move down, the support column 11 causes the adjusting motor 3 to drive the rotating block 4 to move down, the rotating block 4 drives the adjusting slide frame 5 to move down, the adjusting slide frame 5 drives the adjusting slide shaft 6 to move the pressure block 7 down, and the pressure block 7 drives the large heat insulation frame 10 to move down. The large heat insulation frame 10 covers the large heat insulation area. The laser welding head 2 welds the third type of FPC flexible board to the speaker. The large heat insulation frame 10 achieves high-temperature sputtering isolation in the large area. According to different types of FPC flexible boards and speakers, the heat insulation area of ​​the FPC flexible board and speaker can be dynamically adjusted as needed.

[0048] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic welding device for FPC flexible boards and speakers, comprising a welding platform (1) and a controller (32), characterized in that: A laser welding head (2) is provided above the welding platform (1), and a dynamic heat insulation mechanism is provided on one side of the laser welding head (2); The dynamic adjustment heat insulation mechanism includes an adjustment motor (3) disposed on one side of the laser welding head (2), and a rotating block (4) is coaxially fixedly connected to the output end of the adjustment motor (3). An adjustment slide frame (5) is fixedly connected to one end of the rotating block (4). An adjustment slide shaft (6) is slidably connected to the inner wall of the adjustment slide frame (5) and located on one side of the rotating block (4). A pressure block (7) is fixedly installed at one end of the adjustment slide shaft (6). A small heat insulation zone frame (8) is fixedly installed on one side of the pressure block (7). A medium heat insulation zone frame (9) is provided outside the small heat insulation zone frame (8). A large heat insulation zone frame (10) is provided outside the medium heat insulation zone frame (9). A support column (11) is fixedly connected to the top of the adjusting motor (3). A reinforcing column (12) is provided on one side of the support column (11). The bottom end of the reinforcing column (12) is fixedly connected to the medium heat insulation zone frame (9). A support ring (13) is fixedly installed at the top of the reinforcing column (12). The laser welding head (2) and the support column (11) are both fixedly connected to the support ring (13). The laser welding head (2) is electrically connected to the controller (32). Sliding rings (14) are slidably connected to both sides of the adjusting slide frame (5). Both sliding rings (14) are fixedly connected to the adjusting slide shaft (6). The sliding rings (14) are slidably connected to the pressure block (7). An adjusting rod (15) is slidably connected to the inner wall of the adjusting slide frame (5) and near the large heat insulation zone frame (10). Two sliding support rings (16) are fixedly connected to the outer wall of the adjusting rod (15). An L-shaped connecting block (17) is fixedly installed at one end of the adjusting rod (15). A gap is provided between the L-shaped connecting block (17) and one of the sliding support rings (16). The L-shaped connecting block (17) is fixedly connected to the large heat insulation zone frame (10). A concave slide strip (18) is fixedly connected to one side of the inner wall of the large heat insulation zone frame (10). A concave guide strip (19) is fixedly installed on one side of the outer wall of the small heat insulation zone frame (8). Both the concave guide strip (19) and the concave slide strip (18) are slidably connected to the medium heat insulation zone frame (9).

2. The automatic welding device for FPC flexible board and speaker according to claim 1, characterized in that: The outer wall of the adjusting slide shaft (6) and the inner wall of the adjusting slide frame (5) are both smooth surfaces, and the vertical cross-section of the adjusting slide shaft (6) is circular. The controller (32) is electrically connected to the adjusting motor (3).

3. The automatic welding device for FPC flexible board and speaker according to claim 1, characterized in that: The small heat insulation zone frame (8), the medium heat insulation zone frame (9), and the large heat insulation zone frame (10) are all made of aluminum nitride ceramic material. The inner wall diameter of the medium heat insulation zone frame (9) is larger than that of the small heat insulation zone frame (8), and the inner wall diameter of the large heat insulation zone frame (10) is larger than that of the medium heat insulation zone frame (9). The lower surface of the large insulation zone frame (10) is at the same level as the lower surface of the small insulation zone frame (8), the lower surface of the medium insulation zone frame (9) is lower than the lower surface of the small insulation zone frame (8), and the lower surface of the medium insulation zone frame (9) is lower than the lower surface of the large insulation zone frame (10).

4. The automatic welding device for FPC flexible board and speaker according to claim 1, characterized in that: The vertical cross-section of the L-shaped connecting block (17) is L-shaped, and the two sliding support rings (16) are symmetrically arranged about the adjusting rod (15). The outer wall of the adjusting rod (15) and the inner wall of the adjusting slide frame (5) are both smooth surfaces.

5. The automatic welding device for FPC flexible board and speaker according to claim 1, characterized in that: The concave slide (18) has a pressing strip (20) on one side, and the pressing strip (20) is fixedly connected to the large heat insulation zone frame (10). The concave guide strip (19) has a positioning pressing strip (21) on one side, and the positioning pressing strip (21) is fixedly connected to the small heat insulation zone frame (8). A sensing block (22) is provided on one side of the concave guide strip (19). A pressure sensor (23) is fixedly installed at the bottom of the sensing block (22). The pressure sensor (23) is fixedly connected to the medium-sized heat insulation zone frame (9). The pressure sensor (23) is used to sense the pressure of the sensing block (22).

6. The automatic welding device for FPC flexible board and speaker according to claim 5, characterized in that: The vertical cross-sectional shape of the concave guide strip (19) and the concave slide strip (18) is concave, and there is a gap between the pressing strip (20) and the positioning pressing strip (21).

7. The automatic welding device for FPC flexible board and speaker according to claim 1, characterized in that: The laser welding head (2) is fixedly mounted with a positioning slide plate (24), and the bottom end of the welding platform (1) is inserted with a base plate (25). An electric cylinder (26) is installed on the upper surface of the positioning slide plate (24). A sliding guide plate (27) is fixedly connected to one side of the electric cylinder (26). The sliding guide plate (27) is slidably connected to the positioning slide plate (24). A sleeve slider (28) is fixedly installed on one side of the sliding guide plate (27). A transmission screw (29) is threadedly connected to the inner wall of the sleeve slider (28). A support groove frame (31) is slidably installed on the outer wall of the sleeve slider (28). The support groove frame (31) is fixedly connected to the base plate (25). A drive motor (30) is fixedly installed on one side of the inner wall of the support slot frame (31). The drive motor (30) is used to drive the drive screw (29) to rotate. The controller (32) is fixed on one side of the support slot frame (31). The electric cylinder (26) and the drive motor (30) are both electrically connected to the controller (32).

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