An edge sealing device

Abstract

This utility model relates to an edge sealing device, belonging to the technical field of edge sealing devices. It includes a pressure plate, with fixed seats on both sides of the pressure plate. A bracket is fixedly connected to each of the two fixed seats, and the bracket is located inside the fixed seats. An edge sealing wheel is fixedly connected to each of the two brackets. The edge sealing wheels on both sides are symmetrically arranged. The front end of the edge sealing wheel is provided with an annular groove. A pressure head is provided between the two edge sealing wheels. This utility model prevents the movement of parts and material spillage during the edge sealing process, reduces the defective sealing rate, reduces the defective sealing rate from 1% to less than 0.5%, improves product stability, prevents product instability caused by defective sealing, and improves production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to an edge sealing device, belonging to the technical field of edge sealing devices, and particularly to an edge sealing device for an ECM microphone product. Background Technology

[0002] ECM microphones (Electret Condenser Microphones) are acoustic sensors widely used in various electronic devices. In the manufacturing process of ECM microphones, the edge-sealing process is a crucial step from component to finished product. Its purpose is to fix the microphone components inside the housing, allowing the housing to serve to secure the components and provide conductive connection with the PCBA, thus forming the finished microphone.

[0003] Due to limitations in product structure and edge banding wheel structure, existing edge banding devices and methods apply direct pressure to the outer shell during the edge banding process. Because the pressure applied is not precisely controlled, the edge banding wheel often causes material spillage, insufficient material, incomplete sealing, and waste during the edge banding process, affecting production efficiency, yield, and product quality. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned traditional technologies and provide an edge banding device that can effectively improve the edge banding quality and reduce the edge banding scrap rate.

[0005] The purpose of this utility model is achieved through the following technical measures: an edge sealing device, including a pressure plate, with fixed seats on both sides of the pressure plate, and brackets fixedly connected to the two fixed seats respectively. The brackets are set inside the fixed seats, and edge sealing wheels are fixedly connected to the two brackets respectively. The edge sealing wheels on both sides are symmetrically arranged, and the front end of the edge sealing wheel is provided with an annular groove. A pressure head is provided between the two edge sealing wheels.

[0006] As a further improvement to the above technical solution: The distance from the pressure head to the two sealing wheels is equal. The pressure head passes through the pressure plate, which has a first through hole to accommodate the pressure head.

[0007] The pressure head includes a head and a body, with a circular groove at the front end of the head.

[0008] The depth of the circular groove is 1.6-2.0 mm.

[0009] Both the head and body are cylindrical, with the diameter of the head being larger than that of the body.

[0010] The bottom of the circular groove is provided with a second through hole, which extends through the entire pressure head, and the side of the body is provided with a screw hole.

[0011] A sleeve is fixedly connected above the pressure plate. A push rod is provided inside the sleeve. The lower end of the push rod has a connecting part. The connecting part is inserted into the second through hole of the pressure head and fixedly connected by screws and screw holes. The upper end of the push rod has a protrusion. The diameter of the protrusion is smaller than the diameter of the upper end of the push rod. A spring is provided at the upper end of the push rod and the spring is sleeved on the protrusion.

[0012] A driven wheel is fixedly connected to the top of the sleeve. The driven wheel is sleeved on the sleeve and drives the sleeve to rotate. The driven wheel is driven by a transmission belt. The driven wheel is driven by a driving wheel through the transmission belt. A first support plate and a second support plate are arranged in sequence above the pressure plate. The first support plate is located above the second support plate. The driven wheel and the driving wheel are respectively located between the first support plate and the second support plate.

[0013] The drive wheel is connected to a motor, which is mounted on a first support plate. The first support plate is also equipped with a counterweight, which is located on one side of the motor.

[0014] The sleeve passes through the second support plate and the first support plate in sequence, and the upper end of the spring is connected to the bottom of the counterweight.

[0015] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are: a pressure head is set between the two edge sealing wheels, and an annular groove is set at the front end of the edge sealing wheel. Before the edge sealing wheel contacts the outer shell, the pressure head first contacts and presses the PCBA, and fixes other components through the PCBA. Then the upper edge of the outer shell is positioned in the annular groove of the edge sealing wheel, and the edge sealing is performed by the high-speed rotation of the edge sealing wheel.

[0016] This invention prevents parts from shifting and materials from spilling during the edge sealing process, reducing the defective sealing rate from 1% to less than 0.5%, improving product stability, preventing product instability caused by defective sealing, and improving production efficiency and product quality.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an edge-sealing device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of an edge-sealing device according to an embodiment of this utility model; Figure 3 yes Figure 2 The left view; Figure 4 yes Figure 3 Sectional view along the middle AA direction; Figure 5 This is a three-dimensional structural diagram of the pressure head in an embodiment of this utility model; Figure 6 yes Figure 3 A magnified view of part B in the middle.

[0019] In the diagram, 1-pressure plate, 2-fixed base, 3-bracket, 4-sealing wheel, 5-annular groove, 6-pressure head, 7-first through hole, 8-head, 9-body, 10-screw hole, 11-circular groove, 12-second through hole, 13-sleeve, 14-driven wheel, 15-transmission belt, 16-drive wheel, 17-first support plate, 18-second support plate, 19-motor, 20-counterweight, 21-top rod, 22-connecting part, 23-protrusion, 24-spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Example 1

[0023] like Figure 1-6As shown, an edge sealing device includes a pressure plate 1, with fixed seats 2 on both sides of the pressure plate 1. A bracket 3 is fixedly connected to each of the two fixed seats 2. The bracket 3 is located inside the fixed seat 2. An edge sealing wheel 4 is fixedly connected to each of the two brackets 3. The edge sealing wheels 4 on both sides are symmetrically arranged. An annular groove 5 is provided at the front end of the edge sealing wheel 4. A pressure head 6 is provided between the two edge sealing wheels 4. The distance from the pressure head 6 to the two edge sealing wheels 4 is equal. The pressure head 6 passes through the pressure plate 1. The pressure plate 1 is provided with a first through hole 7 that can accommodate the pressure head 6.

[0024] The pressure head 6 includes a head 8 and a body 9, both of which are cylindrical. The diameter of the head 8 is larger than that of the body 9. The body 9 has screw holes 10 on its side, with at least two screw holes 10. The front end of the head 8 has a circular groove 11 with a depth of 1.6mm. The bottom of the circular groove 11 has a second through hole 12 that penetrates the entire pressure head 6. The pressure head is made of stainless steel, making it resistant to wear and deformation. Its hollow design effectively prevents damage to electronic components and solder joints on the PCBA surface.

[0025] A sleeve 13 is fixedly connected above the pressure plate 1, and a driven wheel 14 is fixedly connected above the sleeve 13. The driven wheel 14 is sleeved on the sleeve 13 and drives the sleeve 13 to rotate. The driven wheel 14 is driven by a transmission belt 15, and the driven wheel 14 is driven by a driving wheel 16 through the transmission belt 15. A first support plate 17 and a second support plate 18 are arranged sequentially above the pressure plate 1. The first support plate 17 is located above the second support plate 18. The driven wheel 14 and the driving wheel 16 are respectively located between the first support plate 17 and the second support plate 18. The driving wheel 16 is driven by a motor 19, which is located on the first support plate 17. A counterweight 20 is also provided on the first support plate 17, and the counterweight 20 is located on one side of the motor 19.

[0026] The sleeve 13 passes through the second support plate 18 and the first support plate 17 in sequence. The sleeve 13 is provided with a push rod 21. The lower end of the push rod 21 has a connecting part 22. The connecting part 22 is inserted into the second through hole 12 of the pressure head 6 and is fixedly connected by screws and screw holes 10. The upper end of the push rod 21 has a protrusion 23. The diameter of the protrusion 23 is smaller than the diameter of the upper end of the push rod 21. The upper end of the push rod 21 is provided with a spring 24. The spring 24 is sleeved on the protrusion 23. The upper end of the spring 24 is connected to the bottom of the counterweight 20. The setting of the spring 24 avoids hard contact between the pressure head 6 and the PCBA, which would damage the product. Example 2

[0027] like Figure 1-6As shown, an edge sealing device includes a pressure plate 1, with fixed seats 2 on both sides of the pressure plate 1. A bracket 3 is fixedly connected to each of the two fixed seats 2. The bracket 3 is located inside the fixed seat 2. An edge sealing wheel 4 is fixedly connected to each of the two brackets 3. The edge sealing wheels 4 on both sides are symmetrically arranged. An annular groove 5 is provided at the front end of the edge sealing wheel 4. A pressure head 6 is provided between the two edge sealing wheels 4. The distance from the pressure head 6 to the two edge sealing wheels 4 is equal. The pressure head 6 passes through the pressure plate 1. The pressure plate 1 is provided with a first through hole 7 that can accommodate the pressure head 6.

[0028] The pressure head 6 includes a head 8 and a body 9, both of which are cylindrical. The diameter of the head 8 is larger than that of the body 9. The body 9 has screw holes 10 on its side, with at least two screw holes 10. The front end of the head 8 has a circular groove 11 with a depth of 2.0 mm. A second through hole 12 is located at the bottom of the circular groove 11, penetrating the entire pressure head 6. The pressure head is made of stainless steel, making it resistant to wear and deformation. Its hollow design effectively prevents damage to electronic components and solder joints on the PCBA surface.

[0029] A sleeve 13 is fixedly connected above the pressure plate 1, and a driven wheel 14 is fixedly connected above the sleeve 13. The driven wheel 14 is sleeved on the sleeve 13 and drives the sleeve 13 to rotate. The driven wheel 14 is driven by a transmission belt 15, and the driven wheel 14 is driven by a driving wheel 16 through the transmission belt 15. A first support plate 17 and a second support plate 18 are arranged sequentially above the pressure plate 1. The first support plate 17 is located above the second support plate 18. The driven wheel 14 and the driving wheel 16 are respectively located between the first support plate 17 and the second support plate 18. The driving wheel 16 is driven by a motor 19, which is located on the first support plate 17. A counterweight 20 is also provided on the first support plate 17, and the counterweight 20 is located on one side of the motor 19.

[0030] The sleeve 13 passes through the second support plate 18 and the first support plate 17 in sequence. The sleeve 13 is provided with a push rod 21. The lower end of the push rod 21 has a connecting part 22. The connecting part 22 is inserted into the second through hole 12 of the pressure head 6 and is fixedly connected by screws and screw holes 10. The upper end of the push rod 21 has a protrusion 23. The diameter of the protrusion 23 is smaller than the diameter of the upper end of the push rod 21. The upper end of the push rod 21 is provided with a spring 24. The spring 24 is sleeved on the protrusion 23. The upper end of the spring 24 is connected to the bottom of the counterweight 20. The setting of the spring 24 avoids hard contact between the pressure head 6 and the PCBA, which would damage the product. Example 3

[0031] like Figure 1-6As shown, an edge sealing device includes a pressure plate 1, with fixed seats 2 on both sides of the pressure plate 1. A bracket 3 is fixedly connected to each of the two fixed seats 2. The bracket 3 is located inside the fixed seat 2. An edge sealing wheel 4 is fixedly connected to each of the two brackets 3. The edge sealing wheels 4 on both sides are symmetrically arranged. An annular groove 5 is provided at the front end of the edge sealing wheel 4. A pressure head 6 is provided between the two edge sealing wheels 4. The distance from the pressure head 6 to the two edge sealing wheels 4 is equal. The pressure head 6 passes through the pressure plate 1. The pressure plate 1 is provided with a first through hole 7 that can accommodate the pressure head 6.

[0032] The pressure head 6 includes a head 8 and a body 9, both of which are cylindrical. The diameter of the head 8 is larger than that of the body 9. The body 9 has screw holes 10 on its side, with at least two screw holes 10. The front end of the head 8 has a circular groove 11 with a depth of 1.8mm. The bottom of the circular groove 11 has a second through hole 12 that penetrates the entire pressure head 6. The pressure head is made of stainless steel, making it resistant to wear and deformation. Its hollow design effectively prevents damage to electronic components and solder joints on the PCBA surface.

[0033] A sleeve 13 is fixedly connected above the pressure plate 1, and a driven wheel 14 is fixedly connected above the sleeve 13. The driven wheel 14 is sleeved on the sleeve 13 and drives the sleeve 13 to rotate. The driven wheel 14 is driven by a transmission belt 15, and the driven wheel 14 is driven by a driving wheel 16 through the transmission belt 15. A first support plate 17 and a second support plate 18 are arranged sequentially above the pressure plate 1. The first support plate 17 is located above the second support plate 18. The driven wheel 14 and the driving wheel 16 are respectively located between the first support plate 17 and the second support plate 18. The driving wheel 16 is driven by a motor 19, which is located on the first support plate 17. A counterweight 20 is also provided on the first support plate 17, and the counterweight 20 is located on one side of the motor 19.

[0034] The sleeve 13 passes through the second support plate 18 and the first support plate 17 in sequence. The sleeve 13 is provided with a push rod 21. The lower end of the push rod 21 has a connecting part 22. The connecting part 22 is inserted into the second through hole 12 of the pressure head 6 and is fixedly connected by screws and screw holes 10. The upper end of the push rod 21 has a protrusion 23. The diameter of the protrusion 23 is smaller than the diameter of the upper end of the push rod 21. The upper end of the push rod 21 is provided with a spring 24. The spring 24 is sleeved on the protrusion 23. The upper end of the spring 24 is connected to the bottom of the counterweight 20. The setting of the spring 24 avoids hard contact between the pressure head 6 and the PCBA, which would damage the product.

[0035] When the microphone to be edge-sealed rises through the support device below into the high-speed edge-sealing position, the pressure head 6 presses down on the PCBA, fixing the PCBA and the internally assembled components. The top rod 21 connected above the pressure head 6 has a spring 24 that can retract upwards. The microphone to be edge-sealed and the pressure head 6 continue to rise together. When they reach the low-speed position, the edge-sealing wheel 4 contacts the outer shell to seal the edge, avoiding poor edge sealing caused by uneven assembly or displacement.

[0036] The high-speed position is where the edge-sealing wheel is close to the outer shell, and the low-speed position is the edge-sealing position. The specific parameters are determined according to the product size, appearance, and performance requirements.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An edge sealing device characterized by: It includes a pressure plate (1), with fixed seats (2) on both sides of the pressure plate (1), and brackets (3) fixedly connected to the two fixed seats (2). The brackets (3) are located inside the fixed seats (2), and sealing wheels (4) are fixedly connected to the two brackets (3). The sealing wheels (4) on both sides are symmetrically arranged. The front end of the sealing wheel (4) is provided with an annular groove (5), and a pressure head (6) is provided between the two sealing wheels (4).

2. An edge sealing device according to claim 1, characterized in that: The distance between the pressure head (6) and the two sealing wheels (4) is equal. The pressure head (6) passes through the pressure plate (1), and the pressure plate (1) is provided with a first through hole (7) that can accommodate the pressure head (6) to pass through.

3. An edge sealing device according to claim 1 or 2, characterised in that: The pressure head (6) includes a head (8) and a body (9), and the front end of the head (8) is provided with a circular groove (11).

4. An edge sealing device according to claim 3, wherein: The depth of the circular groove (11) is 1.6-2.0 mm.

5. An edge sealing device according to claim 4, wherein: Both the head (8) and the body (9) are cylindrical, with the diameter of the head (8) being larger than that of the body (9).

6. An edge sealing device according to claim 5, wherein: The bottom of the circular groove (11) is provided with a second through hole (12), which penetrates the entire pressure head (6), and the side of the body (9) is provided with a screw hole (10).

7. An edge sealing device according to claim 6, wherein: A sleeve (13) is fixedly connected above the pressure plate (1). A push rod (21) is provided inside the sleeve (13). The lower end of the push rod (21) has a connecting part (22). The connecting part (22) is inserted into the second through hole (12) of the pressure head (6) and fixedly connected by screws and screw holes (10). The upper end of the push rod (21) has a protrusion (23). The diameter of the protrusion (23) is smaller than the diameter of the upper end of the push rod (21). A spring (24) is provided at the upper end of the push rod (21). The spring (24) is sleeved on the protrusion (23).

8. An edge sealing device according to claim 7, wherein: A driven wheel (14) is fixedly connected above the sleeve (13). The driven wheel (14) is sleeved on the sleeve (13) and drives the sleeve (13) to rotate. The driven wheel (14) is connected to a transmission belt (15). The driven wheel (14) is connected to a driving wheel (16) through the transmission belt (15). A first support plate (17) and a second support plate (18) are arranged in sequence above the pressure plate (1). The first support plate (17) is arranged above the second support plate (18). The driven wheel (14) and the driving wheel (16) are respectively arranged between the first support plate (17) and the second support plate (18).

9. An edge sealing device according to claim 8, wherein: The drive wheel (16) is connected to a motor (19), which is mounted on a first support plate (17). A counterweight (20) is also mounted on the first support plate (17), which is located on one side of the motor (19).

10. An edge sealing device according to claim 9, wherein: The sleeve (13) passes through the second support plate (18) and the first support plate (17) in sequence, and the upper end of the spring (24) is connected to the bottom of the counterweight (20).

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