Anti-falling magnetic resistance structure of lifting curtain

Abstract

The application relates to the field of mechanical transmission and anti-falling protection, in particular to an anti-falling magnetic resistance structure of a lifting curtain, which comprises a magnetic resistance box body with a containing cavity, an output shaft arranged in the containing cavity, a first magnetic attraction piece and a second magnetic attraction piece, the magnetic resistance box body is provided with a through hole communicated with the containing cavity, the output shaft penetrates through the through hole and is connected with a gear in a gear box, the outer wall of the output shaft is provided with the first magnetic attraction piece, the second magnetic attraction piece is arranged in the magnetic resistance box body, the output shaft drives the first magnetic attraction piece to synchronously rotate, and the first magnetic attraction piece and the second magnetic attraction piece are magnetically attracted and matched. The structure can avoid the situation that the curtain is stuck after the motor is powered off, thereby causing the problem that the curtain cannot be normally opened and closed, and meanwhile, manual and flexible adjustment control of the opening and closing degree of the curtain can be ensured.

Description

Technical Field

[0001] This application relates to the fields of mechanical transmission and fall protection, and in particular to a fall-prevention magnetic resistance structure for a lifting curtain. Background Technology

[0002] In the development of modern home environments, the application of motorized curtain systems is becoming increasingly widespread, and the convenience they bring has greatly changed people's lifestyles. With the rise and rapid development of the smart home concept, motorized curtain systems, as an important component of smart homes, are becoming increasingly prominent. They are no longer just simple tools for automatically opening and closing curtains, but a key link in the smart home ecosystem, capable of linking with other smart home devices such as lighting and security systems, further enhancing the intelligence level of the home and the comfort of living. Motorized curtain systems allow users to easily control the opening and closing of curtains via remote control, mobile app, etc., improving the convenience and technological feel of life. In motorized curtain systems, the industry has explored many methods and adopted various approaches to achieve the anti-fall function. When the motor loses power, the curtains usually fall due to their own weight, which not only damages the curtains themselves but also poses certain safety hazards. To solve this problem, existing anti-fall functions usually use a method of directly limiting the gears in the gearbox connected to the motor to achieve a locking function. This method, by restricting the rotation of the gears, prevents the curtains from falling when the motor loses power, and is a relatively direct and common anti-fall measure. In addition, there are other auxiliary methods, such as adding simple mechanical locking structures to lock relevant transmission components the moment the motor loses power. However, these are essentially also designed to limit the rotation of gears and other transmission components. Existing anti-fall methods that directly limit the gears inside the gearbox have significant drawbacks in practical application. When the motor loses power, the gears inside the gearbox are directly locked, causing the movement of the curtains to be momentarily restricted. The restriction can only be lifted by restarting the motor, making it impossible to manually adjust according to actual needs and failing to meet the diverse needs of users for curtain use in different scenarios. Utility Model Content

[0003] To effectively prevent the curtains from jamming after the motor is powered off, thus preventing the curtains from opening and closing normally, and to ensure that the opening and closing degree of the curtains can be manually and flexibly adjusted and controlled, this application provides a fall-prevention magnetic reluctance structure for raising and lowering curtains.

[0004] This application provides a fall-prevention magnetic resistance structure for lifting curtains, including a magnetic resistance box with a receiving cavity, an output shaft, a first magnetic attractor, and a second magnetic attractor disposed inside the receiving cavity. The magnetic resistance box has a through hole communicating with the receiving cavity. The output shaft passes through the through hole and connects to a gear in a gearbox. The first magnetic attractor is disposed on the outer wall of the output shaft, and the second magnetic attractor is disposed in the magnetic resistance box. The output shaft drives the first magnetic attractor to rotate synchronously, and the first magnetic attractor and the second magnetic attractor form a magnetic attraction engagement. By adopting the above technical solution, when the motor loses power, because the output shaft is connected to the gear in the gearbox through the through hole of the magnetic resistance box, and the first magnetic attractor on the outer wall of the output shaft rotates synchronously with the output shaft, and at the same time, the first magnetic attractor and the second magnetic attractor disposed in the magnetic resistance box form a magnetic attraction engagement, this magnetic attraction engagement generates magnetic resistance. This magnetic resistance acts on the output shaft, and then on the gear in the gearbox connected to the output shaft, preventing the gear from rotating freely due to the weight of the curtain, thus preventing the curtain from falling and achieving the fall-prevention function. Unlike existing methods that directly limit the gears within the gearbox, this magnetic resistance method does not completely restrict the movement of the curtains instantly. Users can manually and flexibly adjust the curtains according to actual needs, meeting diverse requirements for curtain use in different scenarios. Preferably, the first magnetic attractor is a circular magnetic ring, which is sleeved on the outer wall of the output shaft. By adopting the above technical solution, the first magnetic attractor is a circular magnetic ring sleeved on the outer wall of the output shaft. When the output shaft rotates, the magnetic ring can rotate synchronously and stably. Because the magnetic ring is circular and tightly sleeved on the output shaft, its circumferential magnetic distribution is relatively uniform. When it forms a magnetic attraction with the second magnetic attractor, the magnetic attraction can be applied evenly in the circumferential direction of the output shaft. Preferably, there are two second magnetic attractors, symmetrically arranged on both sides of the first magnetic attractor. By adopting the above technical solution, this symmetrical distribution ensures that the magnetic attraction force on both sides of the first magnetic attractor is uniform during rotation. When the output shaft drives the first magnetic chuck to rotate synchronously, the symmetrical second magnetic chucks on both sides can more stably form a magnetic attraction with the first magnetic chuck, providing a more balanced magnetic resistance compared to a single second magnetic chuck. Preferably, a fixing member extends from the inner wall of the magnetic resistance box, and the second magnetic chuck is embedded in the fixing member. The fixing member has a notch facing the first magnetic chuck, through which the first magnetic chuck magnetically engages with the second magnetic chuck. By adopting the above technical solution, the fixing member extending from the inner wall of the magnetic resistance box can fix the embedded second magnetic chuck, preventing it from shifting during use. The notch on the fixing member facing the first magnetic chuck allows for an effective magnetic attraction between the first and second magnetic chucks. When the output shaft drives the first magnetic chuck to rotate synchronously, the first magnetic chuck magnetically engages with the second magnetic chuck through the notch, using the magnetic resistance to create a certain degree of resistance to the rotation of the output shaft.Preferably, the second magnetic attractor is a cylindrical magnetic structure. By adopting the above technical solution, the second magnetic attractor is set as a cylindrical magnetic structure, which has a regular shape and uniform magnetic field distribution characteristics. When it forms a magnetic attraction with the first magnetic attractor, the regular shape can ensure that the magnetic attraction between the two is more stable and uniform. Compared with other irregularly shaped magnetic attractors, the cylindrical magnetic structure can provide a more consistent magnetic attraction force in all directions, so that the magnetic resistance experienced by the output shaft during the synchronous rotation of the first magnetic attractor is more balanced. Preferably, the notch of the fixing member is an arc-shaped surface, which is adapted to the outer wall of the magnetic ring. By adopting the above technical solution, since the notch of the fixing member is an arc-shaped surface and is adapted to the outer wall of the magnetic ring, the contact area between the first and second magnetic attractors is increased when they are magnetically attracted, thereby enhancing the magnetic attraction force. Preferably, the magnetic resistance box is provided with mounting holes for connecting to the motor housing. By adopting the above technical solution, the output shaft is connected to the gearbox through a through hole, and the reluctance housing and motor are detachably connected to the motor housing through mounting holes, facilitating subsequent maintenance and replacement. Preferably, the fixing member is cylindrical, and its outer diameter is the same as the outer diameter of the magnetic ring. By adopting the above technical solution, a second magnetic attraction element is provided inside the fixing member, and the notch of the fixing member matches the magnetic ring. When the outer diameters are the same, the magnetic attraction effect is better.

[0005] In summary, this application includes at least one of the following beneficial technical effects: 1. The output shaft drives the first magnetic component to rotate synchronously, and the first magnetic component and the second magnetic component form a magnetic attraction. The magnetic resistance generated by this magnetic attraction prevents the curtain from falling when the motor loses power. 2. By using the magnetic attraction between the first and second magnetic components to generate magnetic resistance, the gears inside the gearbox are prevented from being directly locked. This solves the problem that curtains cannot be manually and flexibly adjusted according to actual needs in existing anti-fall methods, and meets the diverse needs of users for curtains in different scenarios. Attached Figure Description

[0006] Figure 1 This is an exploded view of the anti-fall magnetic resistance structure of a lifting curtain according to this application; Figure 2 This is a structural diagram of an anti-fall magnetic resistance structure for a lifting curtain according to this application.

[0007] Explanation of reference numerals in the attached drawings: 1. Magnetic reluctance housing; 2. Output shaft; 3. First magnetic chuck; 4. Second magnetic chuck; 5. Fixing component; 6. Bearing; 11. Receiving cavity; 12. Through hole; 13. Mounting hole; 14. Snap-fit ​​structure; 51. Notch. Detailed Implementation

[0008] The following is in conjunction with the appendix Figure 1-2This application will be described in further detail.

[0009] This application provides an embodiment of an anti-fall magnetic resistance structure for a lifting curtain, referring to... Figure 1 and Figure 2 The system includes a magnetic reluctance housing 1, an output shaft 2, a first magnetic chuck 3, a second magnetic chuck 4, and a fixing member 5. The magnetic reluctance housing 1 is a cylindrical structure with a receiving cavity 11. The magnetic reluctance housing 1 has a through hole 12 communicating with the receiving cavity 11. In this embodiment, the output shaft 2 is the output shaft of a motor. One end of the output shaft 2 passes through the through hole 12 to the inside of the receiving cavity 11 and connects to a gear in the gearbox. The first magnetic chuck 3 is sleeved on the outer wall of the output shaft 2, and the second magnetic chuck 4 is disposed on the magnetic reluctance housing 1. The output shaft 2 drives the first magnetic chuck 3 to rotate synchronously, forming a magnetic attraction between the first magnetic chuck 3 and the second magnetic chuck 4. This achieves the beneficial effect of preventing the curtain from falling by generating magnetic resistance when the motor loses power, and also allows for manual and flexible adjustment of the curtain's position. This is because the magnetic resistance generated by the magnetic attraction prevents the output shaft 2 from rotating rapidly when the motor loses power, thus preventing the curtain from falling. Furthermore, this magnetic resistance is not rigidly locked, so the curtain can be manually adjusted by overcoming the magnetic resistance.

[0010] The magnetoresistive housing 1 is provided with mounting holes 13, which can be connected to the motor housing by bolts. The outer wall of the magnetoresistive housing 1 is provided with a snap-fit ​​structure 14, which specifically includes snap-fit ​​protrusions for snap-fit ​​connection with the gearbox. The magnetoresistive housing 1 is made of high-strength plastic to ensure the stability and durability of its structure. The snap-fit ​​protrusions are integrally formed with the magnetoresistive housing 1.

[0011] Specifically, the output shaft 2 is used to transmit power. A bearing 6 is installed inside the through hole 12. The output shaft 2 passes through the bearing 6 inside the through hole 12 and connects to the gears in the gearbox, and can rotate within the through hole 12. The output shaft 2 is made of metal, such as stainless steel or carbon steel, to ensure sufficient strength and rigidity. The outer wall of the output shaft 2 needs to be precision machined to ensure a smooth surface and reduce friction with other components. The magnetoresistive housing 1 provides a relatively stable mounting space for the internal components. The through hole 12 is circular in shape, and its size must be compatible with the bearing 6, ensuring that the output shaft 2 can pass through smoothly.

[0012] Specifically, the first magnetic element 3 is a circular magnetic ring. Specifically, the magnetic ring is fitted onto the outer wall of the bearing 6 with an interference fit, so that the magnetic ring is fitted onto the output shaft 2. The magnetic ring can be made of permanent magnet material, such as neodymium iron boron permanent magnets, which have high magnetic strength. The inner diameter of the magnetic ring must match the outer diameter of the bearing 6 to ensure synchronous rotation of the magnetic ring and the output shaft 2. The circular magnetic ring is more stable during rotation.

[0013] Specifically, the second magnetic element 4 is a cylindrical magnetic structure, and there are two of them, symmetrically arranged on both sides of the first magnetic element 3. The second magnetic element 4 can also be made of permanent magnet material. The cylindrical structure facilitates installation and positioning, and also allows for better magnetic attraction with the first magnetic element 3. The cylindrical magnetic structure of the second magnetic element 4 enables a more effective magnetic attraction with the first magnetic element 3.

[0014] A hollow cylindrical fixing member 5 extends from the inner wall of the magnetic reluctance box 1. Its outer diameter is the same as that of the magnetic ring. The fixing member 5 and the magnetic reluctance box 1 are integrally molded from plastic. Its function is to fix the second magnetic attractor 4. The second magnetic attractor 4 is embedded in both fixing members 5. Each fixing member 5 has a notch 51 facing the first magnetic attractor 3. The notch 51 is an arc-shaped surface that fits the outer wall of the magnetic ring. The first magnetic attractor 3 magnetically engages with the second magnetic attractor 4 through the notch 51. This design makes the magnetic attraction between the first magnetic attractor 3 and the second magnetic attractor 4 more concentrated and effective. Specifically, in this embodiment, the maximum arc length of the notch 51 is 1 / 6 of the circumference of the outer wall of the magnetic ring. The size of the notch 51 is adjusted according to the size of the magnetic ring.

[0015] The implementation principle of this embodiment is as follows: During normal operation, the motor drives the first magnetic chuck 3 to rotate via the output shaft 2. The magnetic attraction between the first magnetic chuck 3 and the second magnetic chuck 4 generates a certain amount of magnetic resistance, but this resistance does not affect the normal operation of the motor. When the motor loses power, the weight of the curtain will cause the output shaft 2 to rotate, which in turn drives the first magnetic chuck 3 to rotate. The magnetic attraction between the first magnetic chuck 3 and the second magnetic chuck 4 generates magnetic resistance, which hinders the rotation of the first magnetic chuck 3, and consequently, the rotation of the output shaft 2. Because the output shaft 2 is connected to the gears in the gearbox, the rotation of the gears is restricted, preventing the curtain, which is linked to the gears, from falling directly due to its own weight when the motor loses power. This prevents the curtain from falling due to its own weight. Furthermore, since the magnetic resistance is not rigidly locked, users can manually overcome the magnetic resistance to adjust the position of the curtain, meeting the needs of different scenarios. Compared with existing technologies, this avoids the problem of directly locking the gears and preventing flexible manual adjustment, improving the convenience and safety of curtain use.

[0016] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fall-prevention magnetic resistance structure for lifting curtains, characterized in that, The device includes a magnetoresistive housing (1) with a receiving cavity (11) and an output shaft (2), a first magnetic attractor (3), and a second magnetic attractor (4) disposed inside the receiving cavity (11). The magnetoresistive housing (1) is provided with a through hole (12) communicating with the receiving cavity (11). The output shaft (2) passes through the through hole (12) and is connected to a gear in a gearbox. The first magnetic attractor (3) is disposed on the outer wall of the output shaft (2). The second magnetic attractor (4) is disposed on the magnetoresistive housing (1). The output shaft (2) drives the first magnetic attractor (3) to rotate synchronously. The first magnetic attractor (3) and the second magnetic attractor (4) form a magnetic attraction engagement.

2. The anti-fall magnetic resistance structure for lifting curtains according to claim 1, characterized in that, The first magnetic suction element (3) is a circular magnetic ring, which is sleeved on the outer wall of the output shaft (2).

3. The anti-fall magnetic resistance structure for lifting curtains according to claim 1, characterized in that, The number of the second magnetic suction element (4) is two, and they are symmetrically arranged on both sides of the first magnetic suction element (3).

4. The anti-fall magnetic resistance structure for lifting curtains according to claim 2, characterized in that, The inner wall of the magnetic resistance box (1) is provided with a fixing member (5), and the second magnetic suction member (4) is embedded in the fixing member (5). The fixing member (5) is provided with a notch (51) facing the first magnetic suction member (3). The first magnetic suction member (3) is magnetically attracted to the second magnetic suction member (4) through the notch (51).

5. The anti-fall magnetic resistance structure for lifting curtains according to claim 2, characterized in that, The second magnetic attractor (4) is a cylindrical magnetic structure.

6. The anti-fall magnetic resistance structure for lifting curtains according to claim 4, characterized in that, The notch (51) of the fastener (5) is an arc-shaped surface, which is adapted to the outer wall of the magnetic ring.

7. The anti-fall magnetic resistance structure for lifting curtains according to claim 1, characterized in that, The magnetoresistive housing (1) is provided with mounting holes (13) for connecting the motor housing.

8. The anti-fall magnetic resistance structure for lifting curtains according to claim 4, characterized in that, The fixing member (5) is cylindrical, and its outer diameter is the same as that of the magnetic ring.

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