A surface polishing device for bathroom faucets

Abstract

This invention discloses a surface polishing device for bathroom faucets, including a base, a rotating mechanism, and a polishing mechanism. The rotating mechanism includes a first sliding plate and a first motor, while the polishing mechanism includes a second sliding plate and a second motor. The holding component includes a rotating rod, a fixing sleeve, a positioning component, and a pressure-applying component. This surface polishing device for bathroom faucets has a compact structure, fewer parts, and low manufacturing cost. A robotic arm automatically grasps the faucet and inserts it into the positioning component. By energizing a drive component on the support head, a pushing component is pushed, causing the rotating rod to slide within a sliding hole on the rotating shaft, compressing the first and second springs. This causes the second spring to push the first contact component, maintaining the elastic arm under force deformation, so that the pressure-applying end contacts the inner wall of the faucet, positioning the faucet. The polishing mechanism is then activated to polish the faucet. This device not only quickly positions and fixes the faucet but also improves polishing efficiency and achieves automated operation.

Description

Technical Field

[0001] This invention relates to polishing technology, and more particularly to a surface polishing device for bathroom faucets. Background Technology

[0002] Faucets are widely used in various places. In order to meet the needs of users and improve the aesthetics of faucets during the production process, the surface of faucets is usually polished. During polishing, the faucet needs to be fixed to prevent it from rotating or moving up and down, which would affect the polishing effect.

[0003] Manual polishing not only results in lower polishing precision but also makes it difficult to control the polishing quality. Existing fixtures for fixing faucets during polishing include pneumatic screwdrivers for tightening screws, positioning brackets for positioning the faucet, product connecting sleeves for connecting the faucet and the mold, and screws and nuts for locking and fixing the product. Therefore, fixing the faucet during polishing requires steps such as selecting tooling, tightening screws and nuts, fixing the product connecting sleeve, calibrating and positioning, and tightening the pneumatic screwdriver. The fixture has many parts, resulting in high cost, cumbersome operation, and low work efficiency. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention proposes a surface polishing device for bathroom faucets.

[0005] The technical solution of this invention is implemented as follows: A surface polishing device for bathroom faucets, characterized in that it comprises: A base, wherein a first slide rail and a second slide rail are provided on the base, the first slide rail being horizontally disposed on the base, and the second slide rail being vertically disposed on the base, wherein the first slide rail and the second slide rail are arranged perpendicularly. A rotating mechanism is mounted on a first slide rail. The rotating mechanism includes a first sliding plate and a first motor. The first sliding plate has a first support rod and symmetrically arranged second support rods. The second support rods are located on both sides of the first support rod. The first motor is mounted on the first support rod. A rotating shaft is located in the middle of the first motor, passing through the motor and extending out of it at both ends. Holding components that limit the faucet position on the rotating shaft are located at both ends of the rotating shaft. These holding components are mounted on the second support rods. A polishing mechanism mounted on a second slide rail includes a second sliding plate and a second motor. The second sliding plate has symmetrical support seats, with a rotating shaft in the center of each support seat. Symmetrical polishing wheels are mounted on the rotating shaft. The second motor is mounted on one of the support seats and connected to the rotating shaft. The polishing wheels are driven by the second slide rail to approach and polish the faucet surface on the retaining component. The retaining component includes a rotating rod, a fixed sleeve, a positioning element, and a pressure-applying element. The rotating shaft has a sliding hole and a strip hole. A first spring is installed in the sliding hole. The rotating rod has a limiting pin that mates with the strip hole. One end of the rotating rod is installed in the sliding hole. One end of the first spring contacts the bottom surface of the sliding hole, and the other end contacts the rotating rod. The second support rod has a support head with a first through hole in the middle. The rotating rod is disposed in the first through hole. The support head also has a first threaded portion. The fixed sleeve has a first internal thread that mates with the first threaded portion. The fixed sleeve is fitted over the positioning element and keeps one end of the positioning element connected to the support head. The end of the rotating rod away from the sliding hole has a second internal thread. The pressure-applying element consists of a rod body and multiple elastic arms on the rod body. One end of the rod body has a second threaded portion that mates with the second internal thread. A second spring and a first contact element are fitted on the rod body. One end of the second spring contacts one end of the first contact element, and the other end contacts the positioning element. The other end of the first contact element contacts the elastic arm.

[0006] In this invention, the positioning element consists of an installation end and a sleeve. The installation end is connected to the support head. A rotating hole is provided between the installation end and the sleeve. The rotating rod passes through the first through hole and is placed in the rotating hole. A second through hole is provided at the end of the sleeve away from the installation end. The second through hole communicates with the rotating hole. The pressure-applying element passes through the second through hole and is connected to the second internal thread on the rotating rod.

[0007] In this invention, the fixing sleeve is composed of a sleeve body and a blocking wall. An active chamber is formed inside the sleeve body. A fourth through hole is provided in the middle of the blocking wall. The mounting end is disposed in the active chamber. The sleeve is disposed in the fourth through hole. The inner diameter of the fourth through hole is larger than the outer diameter of the sleeve.

[0008] In this invention, a pressure sensor is provided on the mounting end.

[0009] In this invention, the active chamber is provided with a third spring and a second contact member. One end of the third spring is in contact with the pressure sensor, and the other end is kept in contact with the second contact member. Both the third spring and the second contact member are sleeved on a sleeve.

[0010] In this invention, the second contact member is composed of a third stop, a fourth stop, and a second disc. The second disc is disposed between the third stop and the fourth stop. The second disc has multiple second balls. The third stop contacts a third spring, and the fourth stop contacts a blocking wall. The third stop has a first extension, and the third spring is located in the middle of the first extension. The fourth stop has a second extension, which extends through a fourth through hole to the outside of the active chamber. The length of the second extension is greater than the length of the fixed sleeve.

[0011] In this invention, the first contact member is composed of a first stop, a second stop, and a first disc. The first disc is disposed between the first stop and the second stop. The first disc is provided with a plurality of first balls. The first stop is in contact with a second spring. The second stop is provided with a guide. The guide is connected to the second stop by bolts. The guide is provided with a guide slope and a blocking plane.

[0012] In this invention, the elastic arm is in contact with the guide slope, the elastic arm is provided with a pressure end, the angle between the pressure end and the elastic arm is less than 90°, and the angle between the elastic arm and the rod body is less than 90°.

[0013] In this invention, a pusher disc is provided on the rotating rod, the pusher disc is connected to the rotating rod by bolts, and there is a pusher gap between the pusher disc and the rotating shaft, the length of the pusher gap being less than the length of the strip hole.

[0014] In this invention, the support head is provided with a driving member, the driving member has a third through hole in the middle, the rotating rod is disposed in the third through hole, and the driving member is an electromagnet.

[0015] The surface polishing device for bathroom faucets according to this invention has the following advantages: The device has a compact structure, fewer parts, and low manufacturing cost. A robotic arm automatically grasps the faucet and inserts it into the positioning component. An energized drive unit on the support head pushes a pushing component, causing a rotating rod to slide within a sliding hole on the rotating shaft. This compresses the first and second springs, causing the second spring to push the first contact component, maintaining the elastic arm's deformation under force. This ensures the pressure end contacts the inner wall of the faucet, positioning it and activating the polishing mechanism to polish the faucet. This not only quickly positions and fixes the faucet but also improves polishing efficiency and enables automated operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the surface polishing device for a bathroom faucet according to the present invention. Figure 2 for Figure 1 A schematic diagram of the rotating mechanism in the diagram; Figure 3 for Figure 2 Top view; Figure 4 for Figure 3 Cross-sectional view at point AA; Figure 5 for Figure 2 Exploded view of the retaining component structure in the image; Figure 6 for Figure 5 A schematic diagram of the positioning component structure; Figure 7 for Figure 5 A schematic diagram of the rotating shaft, rotating rod, pushing component, and driving component in the diagram; Figure 8 This is a schematic diagram of the third spring, the second contact, and the fixing sleeve in this invention; Figure 9 for Figure 5 A schematic diagram of the pressure-applying component, the second spring, and the first contact component in the diagram; Figure 10 for Figure 9 A schematic diagram of the guide component structure in the diagram; Figure 11 for Figure 9 Schematic diagram of the pressure-applying component structure; Figure 12 for Figure 2 Cross-sectional view of the retaining component structure; Figure 13 for Figure 12 Enlarged view of section B in the image; Figure 14 for Figure 12 A magnified view of section C in the image.

[0017] In the diagram: 1. Base; 2. Rotating mechanism; 3. Polishing mechanism; 4. First slide rail; 5. Second slide rail; 6. Faucet; 7. First slide plate; 8. First motor; 9. First support rod; 10. Second support rod; 11. Rotating shaft; 12. Holding component; 13. Second slide plate; 14. Second motor; 15. Support base; 16. Rotating shaft; 17. Polishing wheel; 18. Rotating rod; 19. Fixing sleeve; 20. Positioning component; 21. Pressing component; 22. Sliding hole; 23. Strip hole; 24. First spring; 25. Limiting pin; 26. Support head; 27. First through hole; 28. First threaded part; 29. ​​First internal thread; 30. Pushing plate; 31. Bolt; 32. Pushing gap; 33. Driving component; 34. Third through hole. 35. Sleeve body 35, blocking wall 36, moving chamber 37, fourth through hole 38, mounting end 39, sleeve 40, third spring 41, second contact 42, pressure sensor 43, third stop 44, fourth stop 45, second disc 46, second ball 47, first extension 48, second extension 49, rotating hole 50, second through hole 51, second internal thread 52, rod body 53, elastic arm 54, second threaded part 55, first contact 56, first stop 57, second stop 58, first disc 59, first ball 60, guide 61, guide slope 62, blocking plane 63, pressure end 64, inner hole 65, second spring 66. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] like Figures 1 to 14 As shown, the surface polishing device for a bathroom faucet according to the present invention includes a base 1, a rotating mechanism 2, and a polishing mechanism 3. The base 1 is provided with a first slide rail 4 and a second slide rail 5. The first slide rail 4 is horizontally arranged on the base 1, and the second slide rail 5 is vertically arranged on the base 1, with the first slide rail 4 and the second slide rail 5 being perpendicular to each other. The first slide rail 4 is used to realize the left-right displacement of the rotating mechanism 2, while the second slide rail 5 is used to realize the front-back displacement of the polishing mechanism 3, enabling all-around polishing of the faucet surface 6.

[0020] The rotating mechanism 2 is mounted on the first slide rail 4. The rotating mechanism 2 includes a first slide plate 7 and a first motor 8. The first slide plate 7 has a first support rod 9 and symmetrically arranged second support rods 10, with the second support rods 10 positioned on either side of the first support rod 9. The first motor 8 is mounted on the first support rod 9. A rotating shaft 11 is located in the middle of the first motor 8, passing through the motor and extending outwards at both ends. Holding components 12, which limit the faucet 6 to its position, are located at both ends of the rotating shaft 11 and are mounted on the second support rods 10.

[0021] The first motor 8 is a dual-head motor, allowing processing at both ends and increasing output. Furthermore, in actual production, the number of polishing mechanisms 3 and rotating mechanisms 2 can be increased to achieve multiple setups. A robotic arm picks up the faucet 6 and places it onto the rotating mechanism 2. After polishing, the robotic arm automatically removes it, achieving automated operation. This not only reduces labor costs but also ensures consistent polishing precision and quality for each faucet 6, improving polishing efficiency and output.

[0022] The polishing mechanism 3 is mounted on the second slide rail 5. The polishing mechanism 3 includes a second slide plate 13 and a second motor 14. The second slide plate 13 is provided with symmetrical support seats 15. The support seats 15 have a rotating shaft 16 in the middle. The rotating shaft 16 is provided with symmetrical polishing wheels 17. The second motor 14 is mounted on a support seat 15 and connected to the rotating shaft 16. The polishing wheels 17 are driven by the second slide rail 5 to approach the holding member 12 and polish the surface of the faucet 6 on the holding member 12.

[0023] The second motor 14 drives the rotating shaft 16 to rotate, which in turn drives the polishing wheel 17 to rotate, thereby polishing the surface of the faucet 6. During the polishing process, the first slide rail 4 drives the rotating mechanism 2 to move left and right, while the second slide rail 5 drives the polishing mechanism 3 to move back and forth, enabling comprehensive polishing of the faucet 6 surface.

[0024] The retaining component 12 includes a rotating rod 18, a fixing sleeve 19, a positioning component 20, and a pressure component 21. The rotating shaft 11 has a sliding hole 22 and a slotted hole 23. A first spring 24 is installed inside the sliding hole 22. The rotating rod 18 has a limiting pin 25 that mates with the slotted hole 23. One end of the rotating rod 18 is installed inside the sliding hole 22, and one end of the first spring 24 contacts the bottom surface of the sliding hole 22, while the other end contacts the rotating rod 18. The limiting pin 25 restricts the synchronous rotation of the rotating shaft 11 and the rotating rod 18. Furthermore, the sliding hole 22 allows the rotating rod 18 to compress the first spring 24 when pushed, enabling the limiting pin 25 to slide within the slotted hole 23, thus moving the pressure component 21 on the rotating rod 18.

[0025] The second support rod 10 is provided with a support head 26, and the support head 26 has a first through hole 27 in the middle. The rotating rod 18 is disposed in the first through hole 27. The support head 26 is also provided with a first threaded part 28, and the fixing sleeve 19 is provided with a first internal thread 29 that mates with the first threaded part 28.

[0026] A pusher disk 30 is provided on the rotating rod 18. The pusher disk 30 is a permanent magnet. The pusher disk 30 is connected to the rotating rod 18 by bolts 31. There is a pusher gap 32 between the pusher disk 30 and the rotating shaft 11. The length of the pusher gap 32 is less than the length of the strip hole 23.

[0027] A drive element 33 is provided on the support head 26. A third through hole 34 is provided in the middle of the drive element 33, and a rotating rod 18 is disposed within the third through hole 34. The drive element 33 is an electromagnet. When the drive element 33 is energized, it can push the push disk 30. When the drive element 33 is de-energized, the push disk 30 will approach the drive element 33 under the elastic force of the first spring 24 and the second spring 66. When the side of the push disk 30 closest to the drive element 33 is the N pole, the side of the drive element 33 closest to the push disk 30 is also the N pole. If the side of the push disk 30 closest to the drive element 33 is the S pole, the side of the drive element 33 closest to the push disk 30 is also the S pole.

[0028] The fixed sleeve 19 consists of a sleeve body 35 and a blocking wall 36. The sleeve body 35 forms a movable chamber 37, and the first internal thread 29 is disposed in the movable chamber 37. The blocking wall 36 has a fourth through hole 38 in the middle. The mounting end 39 is disposed in the movable chamber 37, and the sleeve 40 is disposed in the fourth through hole 38. The inner diameter of the fourth through hole 38 is larger than the outer diameter of the sleeve 40.

[0029] The positioning element 20 consists of a mounting end 39 and a sleeve 40. The mounting end 39 is located inside the movable chamber 37, while part of the sleeve 40 is located inside the movable chamber 37, and the remainder extends to the outside through the fourth through hole 38. The positioning element 20 is used to support the faucet 6, allowing the faucet 6 to rotate on the positioning element 20.

[0030] The activity chamber 37 is equipped with a third spring 41 and a second contact 42. One end of the third spring 41 is in contact with the pressure sensor 43, and the other end is in contact with the second contact 42. Both the third spring 41 and the second contact 42 are sleeved on the sleeve 40.

[0031] The second contact member 42 consists of a third stop 44, a fourth stop 45, and a second disc 46. The second disc 46 is disposed between the third stop 44 and the fourth stop 45. The second disc 46 is provided with multiple second balls 47. The third stop 44 is in contact with the third spring 41, and the fourth stop 45 is in contact with the blocking wall 36. The third stop 44 is provided with a first extension 48, and the third spring 41 is located in the middle of the first extension 48. The fourth stop 45 is provided with a second extension 49, which extends through the fourth through hole 38 to the outside of the active chamber 37. The length of the second extension 49 is greater than the length of the fixed sleeve 19.

[0032] Because the second extension 49 is relatively long, it can be pushed by the faucet 6, preventing the faucet 6 from entering the active chamber 37. This allows the faucet 6 to be polished outside the active chamber 37 by the polishing wheel 17. The second contact member 42 can rotate the fourth stop member 45 while the rotating rod 18 drives the pressure member 21 and the faucet 6. However, because the third stop member 44 and the fourth stop member 45 are provided with a second ball bearing 47, the third stop member 44 will not rotate.

[0033] The mounting end 39 remains connected to the support head 26. A rotating hole 50 is provided between the mounting end 39 and the sleeve 40. The rotating rod 18 passes through the first through hole 27 and is placed in the rotating hole 50. A second through hole 51 is provided at the end of the sleeve 40 away from the mounting end 39. The second through hole 51 communicates with the rotating hole 50. The pressure applying member 21 passes through the second through hole 51 and is connected to the second internal thread 52 on the rotating rod 18.

[0034] A pressure sensor 43 is provided on the mounting end 39. The pressure sensor 43 is used to compress the third spring 41 when the third spring 41 is pushed by the faucet 6. The faucet 6 pushes the second contact member 42, causing the second contact member 42 to compress the third spring 41. When the third spring 41 is compressed to a certain extent and can no longer be compressed, the pressure sensor 43 is subjected to the maximum pressure. At this time, the pressure information is converted into an electrical signal and transmitted to the controller, which then powers the drive member 33.

[0035] The fixing sleeve 19 is fitted over the positioning member 20, keeping one end of the positioning member 20 connected to the support head 26. The rotating rod 18 has a second internal thread 52 at the end away from the sliding hole 22. The pressure applying member 21 consists of a rod body 53 and multiple elastic arms 54 provided on the rod body 53. One end of the rod body 53 has a second threaded portion 55 that mates with the second internal thread 52. A second spring 66 and a first contact member 56 are fitted on the rod body 53. One end of the second spring 66 contacts one end of the first contact member 56, and the other end contacts the positioning member 20. The other end of the first contact member 56 contacts the elastic arm 54.

[0036] The first contact member 56 is composed of a first stop 57, a second stop 58 and a first disc 59. The first disc 59 is located between the first stop 57 and the second stop 58. The first disc 59 is provided with multiple first balls 60. The first stop 57 is in contact with the second spring 66. The second stop 58 is provided with a guide 61. The guide 61 is connected to the second stop 58 by bolts 31. The guide 61 is provided with a guide slope 62 and a blocking plane 63.

[0037] The second stop 58 will rotate with the guide 61, the guide 61 will rotate with the pressure member 21, while the first stop 57 will not rotate.

[0038] The elastic arm 54 contacts the guide slope 62. The elastic arm 54 is provided with a pressure end 64. The angle between the pressure end 64 and the elastic arm 54 is less than 90°. The angle between the elastic arm 54 and the rod 53 is less than 90°.

[0039] Since the guide slope 62 is in contact with the elastic arm 54, the elastic arm 54 is in an inclined state. When the pressure-applying member 21 is pulled by the rotating rod 18, the second spring 66 can be compressed first. When the second spring 66 can no longer be compressed, the first contact member 56 abuts against the second spring 66, thereby causing the pressure-applying member 21 to continue to be pulled, causing the elastic arm 54 to deform along the guide slope 62 under force, gradually keeping the angle between the elastic arm 54 and the blocking plane 63 smaller. When the pressure-applying end 64 gradually contacts the inner hole 65 of the faucet 6, a large frictional force can be generated between the pressure-applying end 64 and the inner hole 65. A rubber part can be set on the pressure-applying end 64 to increase the frictional force. Thus, the pressure-applying member 21 can drive the faucet 6 to rotate on the positioning member 20 while rotating.

[0040] After polishing is completed, the controller reverses the power supply to the drive unit 33 or disconnects the power supply to the drive unit 33. With the cooperation of the first spring 24 and the second spring 66, the drive unit 33 attracts the push plate 30, causing the rotating rod 18 to be pushed in the opposite direction of the rotating shaft 11. The pressure end 64 no longer contacts the inner hole 65, and the polished faucet 6 can be removed.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A surface polishing device for a bathroom faucet, characterized by, include: A base, wherein a first slide rail and a second slide rail are provided on the base, the first slide rail being horizontally disposed on the base, and the second slide rail being vertically disposed on the base, wherein the first slide rail and the second slide rail are arranged perpendicularly. A rotating mechanism is mounted on a first slide rail. The rotating mechanism includes a first sliding plate and a first motor. The first sliding plate has a first support rod and symmetrically arranged second support rods. The second support rods are located on both sides of the first support rod. The first motor is mounted on the first support rod. A rotating shaft is located in the middle of the first motor, passing through the motor and extending out of it at both ends. Holding components that limit the faucet position on the rotating shaft are located at both ends of the rotating shaft. These holding components are mounted on the second support rods. A polishing mechanism mounted on a second slide rail includes a second sliding plate and a second motor. The second sliding plate has symmetrical support seats, with a rotating shaft in the center of each support seat. Symmetrical polishing wheels are mounted on the rotating shaft. The second motor is mounted on one of the support seats and connected to the rotating shaft. The polishing wheels are driven by the second slide rail to approach and polish the faucet surface on the retaining component. The retaining component includes a rotating rod, a fixed sleeve, a positioning component, and a pressure-applying component. The rotating shaft has a sliding hole and a strip hole. A first spring is installed in the sliding hole. The rotating rod has a limiting pin that mates with the strip hole. One end of the rotating rod is installed in the sliding hole. One end of the first spring contacts the bottom surface of the sliding hole, and the other end contacts the rotating rod. The second support rod has a support head with a first through hole in the middle. The rotating rod is disposed in the first through hole. The support head also has a first threaded portion. The fixed sleeve has a first internal thread that mates with the first threaded portion. The fixed sleeve is fitted over the positioning component and keeps one end of the positioning component connected to the support head. The end of the rotating rod away from the sliding hole has a second internal thread. The pressure-applying component consists of a rod body and multiple elastic arms on the rod body. One end of the rod body has a second threaded portion that mates with the second internal thread. A second spring and a first contact component are fitted on the rod body. One end of the second spring contacts one end of the first contact component and the other end contacts the positioning component. The other end of the first contact component contacts the elastic arm. The positioning component consists of an installation end and a sleeve. The installation end is connected to the support head. A rotating hole is provided between the installation end and the sleeve. The rotating rod passes through the first through hole and is placed in the rotating hole. A second through hole is provided at the end of the sleeve away from the installation end. The second through hole communicates with the rotating hole. The pressure application component passes through the second through hole and is connected to the second internal thread on the rotating rod. The fixing sleeve consists of a sleeve body and a blocking wall. The sleeve body forms an active chamber inside. The blocking wall has a fourth through hole in the middle. The mounting end is located in the active chamber. The sleeve is located in the fourth through hole. The inner diameter of the fourth through hole is larger than the outer diameter of the sleeve. A pressure sensor is provided on the mounting end; The activity chamber is equipped with a third spring and a second contact. One end of the third spring is in contact with the pressure sensor, and the other end is in contact with the second contact. Both the third spring and the second contact are sleeved on a sleeve. The second contact member consists of a third stop, a fourth stop, and a second disc. The second disc is disposed between the third stop and the fourth stop. The second disc has multiple second balls. The third stop contacts the third spring, and the fourth stop contacts the blocking wall. The third stop has a first extension, and the third spring is located in the middle of the first extension. The fourth stop has a second extension, which extends through the fourth through hole to the outside of the active chamber. The length of the second extension is greater than the length of the fixed sleeve. The first contact member consists of a first stop, a second stop, and a first disc. The first disc is disposed between the first stop and the second stop. The first disc has multiple first balls. The first stop is in contact with a second spring. The second stop has a guide. The guide is connected to the second stop by bolts. The guide has a guide slope and a blocking plane.

2. The surface polishing apparatus for a bathroom faucet according to claim 1, wherein The elastic arm is in contact with the guide slope, and the elastic arm is provided with a pressure end. The angle between the pressure end and the elastic arm is less than 90°, and the angle between the elastic arm and the rod body is less than 90°.

3. The surface polishing apparatus for a bathroom faucet according to claim 1, wherein The rotating rod is provided with a pusher plate, which is connected to the rotating rod by bolts. There is a pusher gap between the pusher plate and the rotating shaft, and the length of the pusher gap is less than the length of the strip hole.

4. The surface polishing apparatus for a bathroom faucet according to claim 3, wherein The support head is provided with a driving component, the driving component has a third through hole in the middle, the rotating rod is disposed in the third through hole, and the driving component is an electromagnet.

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