An embedded head for a venetian blind

Abstract

The application relates to a built-in head suitable for a shutter, and relates to the technical field of reducers. The built-in head comprises a shell, a rope driving wheel, an output shaft, a speed reduction assembly and a hovering assembly. The speed reduction assembly comprises a sun gear, an idler gear, a ring gear and a wheel carrier which are mutually engaged to form a planetary gear train to reduce the rotating speed. The hovering assembly comprises a driving arc plate, a driven arc plate, a sleeve and a one-way self-locking spring. In operation, a user pulls the rope driving wheel, power is transmitted to the driving arc plate through the speed reduction assembly, the driving arc plate pushes the driving handle of the one-way self-locking spring, the driven arc plate and the output shaft are driven to rotate, and the rising or falling of the shutter is realized. When the shutter is hovering, the self-weight of the shutter acts on the driven arc plate through the output shaft in the reverse direction, the one-way self-locking spring is radially contracted and tightly clamped on the sleeve, friction force is generated to realize self-locking hovering. The friction locking of the one-way self-locking spring replaces the traditional mechanical clamping, the hovering failure problem caused by the abrasion of a small roller is solved, and the lifting speed is effectively controlled.

Description

Technical Field

[0001] This application relates to the field of speed reducer technology, and in particular to an embedded control head suitable for louvers. Background Technology

[0002] Venetian blinds are a type of window that originated in China. Aesthetically pleasing and energy-efficient, venetian blinds can be fully retracted, offering an unobstructed view of the outside scenery while maintaining a simple and elegant appearance and providing excellent privacy.

[0003] I. In the existing technology, referring to Chinese patent CN1176335A, the lifting and hovering functions of louvers rely entirely on the mechanical cooperation of a "double roller rope lock". Its core structure includes four main components: a fixed large roller, a sliding small roller, a traction rope, and a longitudinal long groove. The specific working process can be divided into three working conditions: "lifting, lowering, and hovering". 1. Rope winding foundation: a prerequisite for power transmission One end of the traction rope is fixed to a hook on the lower rail of the louver, and the other end passes around the outer circumference of the small roller and then the outer circumference of the large roller, finally emerging from the pre-drilled hole in the head rail of the louver for manual pulling by the user. The large roller and the small roller are coaxially arranged (the axes are on the same straight line), and both surfaces have fine anti-slip textures. This is a key design feature that generates clamping friction and prevents the rope from slipping on the roller surface.

[0004] 2. Ascending condition: The small drum slides synchronously with the rope. When the user pulls the exposed rope upwards, the rope causes the large roller to rotate clockwise around a fixed axis. Simultaneously, the rope exerts an upward-sloping force on the small roller, forcing its shaft to slide upwards along a longitudinal groove. This groove restricts the small roller's movement, allowing it to move only towards or away from the large roller, preventing lateral movement. As the small roller slides upwards, the distance between it and the large roller gradually decreases, and the anti-slip textures on their surfaces begin to make initial contact. At this point, the rotational power of the large roller is transmitted to the small roller through the contact point, causing it to rotate synchronously. Ultimately, the rope's traction pulls the lower rail of the louvers upwards, achieving an overall upward lift.

[0005] 3. Suspension Condition: Double rollers engage and lock the rope. When the blinds reach the target height (e.g., halfway up the window), the user stops pulling the cord. At this point, the lower track of the blinds, under the influence of gravity, creates a continuous downward tension on the double rollers via the cord. This tension firmly presses the smaller roller's shaft against the upper part of the long groove, forcing the smaller roller to remain in complete contact with the larger roller. Due to the tight contact of the anti-slip texture on the surfaces of the double rollers, a static friction force far exceeding the weight of the blinds is generated between them: on the one hand, the larger roller is restricted by friction and cannot rotate in the opposite direction; on the other hand, the cord is clamped in the gap where the double rollers are in contact and cannot slide downwards. Ultimately, the entire system achieves a balance of forces, and the blinds remain stably suspended at the current height, preventing them from falling due to gravity.

[0006] 4. Descent mode: Dual roller separation and unlocking To lower the blinds, the user simply needs to gently pull the exposed cord again. This action briefly changes the direction of the cord's tension, causing the smaller roller's shaft to slide downwards along the long groove, disengaging the two rollers from their contact. As the distance between the two rollers increases, static friction disappears, the larger roller resumes free rotation, and the lower rail of the blinds slowly descends under gravity, releasing the cord from between the two rollers. The user can control the timing of releasing the cord to lower the blinds to the target position and then stop pulling, repeating the hovering and locking process.

[0007] II. Core Issue 1: Wear on the small roller causes the hovering function to fail. The dual-roller "fitting and locking" design inherently suffers from mechanical friction wear. With repeated use, wear accumulates, eventually causing the hovering function to fail. During the fitting process and in the hovering state, the small and large rollers are not completely stationary; instead, minute tension fluctuations in the rope (such as window vibrations or slight contact with the lower rail) cause slight relative sliding. Simultaneously, the small roller's shaft also experiences friction due to its up-and-down sliding within the long groove. These two friction points continuously wear down the surface material of the small roller and the edges of the shaft. Especially since the small rollers are often made of plastic or lightweight metal (low cost, easy to process), their hardness is far lower than that of the fixed large roller, meaning wear is primarily concentrated on the small roller.

[0008] After 1-2 years of use, the anti-slip texture on the surface of the small rollers will wear down, and the originally rough contact surface will become smooth, significantly reducing the static friction when the two rollers are in contact. At this time, a "slight descent" phenomenon may occur when hovering: for example, after the blinds are hovered, they will slowly slide down a few centimeters, requiring repeated pulling of the rope for adjustment; if the window shakes slightly, the descent will be more obvious.

[0009] Severe Wear: The hovering function completely fails. When the wear of the small roller exceeds a critical value, the double rollers cannot form an effective clamp when they are in contact. Even if the small roller shaft is against the upper part of the long groove, the static friction between the two will be less than the weight of the lower rail of the louver due to uneven surfaces or excessive gaps. At this time, after the user stops pulling the rope, the louver will fall directly along the track until it is completely closed. It cannot be hovered at any height and can only be fixed by the two states of "fully raised (top of the first rail)" or "fully lowered (to the windowsill)".

[0010] III. Core Issue 2: Lack of deceleration function leads to inconvenience in use. This rope lock structure relies solely on the engagement or disengagement of the dual rollers to control lifting, without any buffering or deceleration components. This means that the lifting process is entirely dependent on manual user control, resulting in a significant user pain point. During descent, the blinds are prone to uncontrolled descent. After the double rollers separate, the descent speed is entirely controlled by the user's grip on the rope. If the user releases too quickly or lacks sufficient hand strength to stabilize the rope, the lower rail will plummet rapidly under gravity, ultimately crashing heavily onto the windowsill or ground. This not only produces a piercing noise but can also deform the lower rail, misalign the slats, and even damage items below (such as windowsill plants, tables, and chairs).

[0011] This type of venetian blind is simple in principle and low in cost, but the wear of the small rollers due to mechanical friction and the lack of a speed reduction design are its core shortcomings in long-term use. The former directly affects the functional lifespan, while the latter reduces operational safety and convenience. These issues have also become the direction for subsequent upgrades of venetian blind technology. Utility Model Content

[0012] To overcome the aforementioned technical problems, this application provides an embedded control head suitable for venetian blinds.

[0013] An embedded control head for venetian blinds includes a housing, a rope drive wheel, and an output shaft. The housing serves as a mounting base, and its interior contains a speed reduction assembly for reducing the transmission speed and a hovering assembly for allowing the venetian blinds to hover at any position. The rope drive wheel is connected to the speed reduction assembly to input external operating force. The speed reduction assembly is connected to the hovering assembly via a wheel frame, and the hovering assembly is connected to the output shaft to transmit the reduced power to the venetian blind actuator.

[0014] By adopting the above technical solution, the deceleration and hovering functions are integrated into the housing, resulting in a compact structure. The deceleration component effectively reduces the input speed from the rope drive wheel, and the hovering component achieves reliable one-way self-locking. This ensures stable and controllable raising and lowering of the louvers while enabling reliable hovering at any position and allowing the louvers to flip at any angle, thus solving the problems of rapid wear and lack of deceleration function in traditional double-roller structures.

[0015] Furthermore, baffles are fixedly provided at both ends of the housing along the axial direction of the output shaft. The rope drive wheel is installed at the end of the housing away from the output shaft and is axially limited by the baffles. The rope drive wheel is also coaxially fixedly connected to a rope wheel axle. The reduction assembly includes a sun gear, which is fixedly provided at the end of the rope wheel axle away from the rope drive wheel.

[0016] By adopting the above technical solution, the baffle forms a closed structure of the outer shell, providing a stable installation environment for the internal components. The rope drive wheel and the sun wheel are coaxially and fixedly connected through the rope wheel axle, ensuring that the input power of the user pulling the rope can be directly and efficiently transmitted to the reduction assembly.

[0017] Furthermore, the wheel frame is rotatably placed inside the housing, and the reduction assembly also includes an idler wheel and a gear ring. The idler wheel is provided in a plurality of evenly distributed manner, and the gear ring is fixedly installed on the inner surface of the housing. The side of the idler wheel away from the gear ring is driven by the sun gear through tooth meshing, and the side of the idler wheel close to the gear ring is driven by the gear ring through tooth meshing.

[0018] By adopting the above technical solution, a planetary gear reduction mechanism is formed by a sun gear, an idler gear, and a fixed gear ring. When power is input to the sun gear, it forces the idler gear to both rotate around its own axis and revolve along the inner wall of the gear ring, thereby achieving a large reduction ratio, effectively reducing the output speed, increasing the output torque, and making the louver lifting process smoother and more controllable.

[0019] Furthermore, the gear ring and the outer shell are fixed in place, the wheel frame includes two parallel rotating parts, the two rotating parts are fixedly connected by several connecting shafts, the wheel frame is rotatably mounted on the rope wheel axle through the rotating parts, and several idler wheels are rotatably mounted on the connecting shafts.

[0020] By adopting the above technical solution, the two rotating parts of the wheel frame form a robust frame structure through a connecting shaft, which can reliably support each idler wheel and also serve as the power output end of the reduction assembly. This structure ensures the stability of the idler wheel's revolution and transmits the reduced rotational motion through the wheel frame.

[0021] Furthermore, the hovering assembly includes a drive arc plate and a driven arc plate. The drive arc plate is fixedly disposed on the end face of the rotating part of the wheel frame on the side away from the rope drive wheel, and the output shaft is coaxially and fixedly connected to the driven arc plate.

[0022] By adopting the above technical solution, the driving arc plate acts as the active component, inputting power from the wheel frame into the hovering assembly; the driven arc plate acts as the driven component, outputting power to the louver actuator. This separate design provides space for the intervention of the unidirectional self-locking spring, which is the foundation for realizing unidirectional transmission and hovering functions.

[0023] Furthermore, the hovering assembly also includes a sleeve, and a sleeve shaft is provided on the baffle on the side of the housing near the output shaft, protruding toward the driving arc plate and the driven arc plate, and the sleeve is interference-fitted onto the sleeve shaft.

[0024] By adopting the above technical solution, the sleeve shaft provides a fixed mounting base for the sleeve. This structure makes the sleeve an independent component in the hovering assembly and the core support for the one-way self-locking spring to achieve the locking function.

[0025] Furthermore, a one-way self-locking spring is tightly fitted around the outer periphery of the sleeve. The one-way self-locking spring includes a cylindrical helical spring body and a drive handle integrally formed on the two helical ends of the spring body. The two drive handles extend outward along the radial direction of the spring body, and the extension direction is perpendicular to the axial direction of the spring body.

[0026] By adopting the above technical solution, the one-way self-locking spring is the core of this application. When subjected to torque in different directions, the spring body will radially contract or expand. When rotating in the tightening direction, the spring body contracts and clamps the sleeve, generating a huge frictional force to achieve locking; when rotating in the relaxation direction, the spring body expands and releases the sleeve, achieving free rotation. Two drive handles are used to cooperate with the drive and driven arc plates to transmit torque and trigger changes in the spring's state.

[0027] Furthermore, a gap is provided between the driving arc plate and the driven arc plate to form a driving groove, and the two driving handles are respectively inserted into the driving groove and make contact with the driving arc plate or the driven arc plate.

[0028] By adopting the above technical solution, the drive groove provides precise movement space and force points for the two drive handles. During lifting and lowering, the drive arc plate drives the one-way self-locking spring and the driven arc plate by pushing one of the drive handles; when hovering, the driven arc plate locks the spring by pushing the drive handle. This ingenious coordination achieves a smooth switching between power transmission and one-way self-locking.

[0029] In summary, this application includes at least one of the following beneficial technical effects: 1. Solves the problem of hovering failure caused by wear of the small roller: This application uses a one-way self-locking spring as the core component of the hovering assembly. Its locking principle is based on the friction between the spring body and the sleeve, rather than the mechanical clamping of the traditional double rollers. This design avoids the hovering failure problem caused by component wear, greatly improving the service life and reliability of the product; 2. Achieved speed reduction function: This application achieves effective reduction of input speed by designing a speed reduction component, including a sun gear, idler gear, gear carrier, and gear ring. During lifting and lowering, especially during descent, the speed reduction component can control the descent speed of the louvers, avoiding safety hazards and noise problems caused by excessive speed, and improving the user experience. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the head being embedded and installed within the louver support frame; Figure 2 This is a three-dimensional view of the cutting head; Figure 3 It is a 3D view with a baffle hidden, mainly showing the output shaft, the drive arc plate and the driven arc plate; Figure 4 It is a three-dimensional view of the deceleration component and the hovering component, mainly showing their connection structure; Figure 5 The main exhibits are the rope drive wheel and the rope wheel axle; Figure 6 The main focus is on showcasing the sun gear and idler gear in the reduction gear assembly; Figure 7 The main focus is on showcasing the specific structure of the speed reduction assembly after assembly. Figure 8 The main exhibit showcases the structure of the wheel frame and drive arc plate; Figure 9 The main components on display are the driving arc plate, the driven arc plate, and the driving slot. Figure 10 The main exhibits include bushings, sleeves, and one-way self-locking springs.

[0031] Explanation of reference numerals in the attached drawings: 1. Support frame; 10. Outer shell; 11. Baffle; 12. Sleeve shaft; 13. Rope drive wheel; 14. Rope wheel axle; 21. Sun gear; 22. Idler gear; 23. Gear ring; 24. Wheel frame; 241. Rotating part; 242. Connecting shaft; 31. Drive arc plate; 32. One-way self-locking spring; 321. Spring body; 322. Drive handle; 33. Driven arc plate; 34. Output shaft; 35. Sleeve; 36. Drive groove; 4. Rope buckle; 5. Rotating wheel. Detailed Implementation

[0032] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] This application discloses an embedded control head suitable for venetian blinds, referring to... Figure 1 One embedded control head is installed in the support frame 1 at the top of the entire louver. It aims to solve the problems of easy wear, short hovering life, and lack of deceleration function in existing double-roller rope lock structures. This control head achieves reliable hovering function and stable deceleration effect through an innovative planetary gear reduction structure and a one-way self-locking spring locking mechanism, significantly improving product lifespan and user experience.

[0034] Reference Figure 2 and Figure 3 The outer shell 10 serves as the mounting base, integrally injection molded from high-strength engineering plastic, possessing excellent strength, wear resistance, and aging resistance. The outer shell 10 is a hollow shell, with an internal mounting cavity to accommodate various functional components. Its cross-section is approximately square, facilitating embedded installation with the louver support frame 1. Several engaging protrusions are provided on the outer surface of the outer shell 10 to engage with corresponding grooves on the support frame 1, ensuring reliable fixation of the outer shell 10 within the support frame 1 and preventing loosening or rotation during use. Baffles 11 are fixed to both ends of the outer shell 10 along the output shaft 34. The two baffles 11, together with the outer shell 10, form an axial limit for the mounting cavity, effectively preventing axial movement of internal components during operation.

[0035] Reference Figure 5The rope drive wheel 13 is rotatably mounted on the end of the housing 10 away from the output shaft 34. Its axial movement is limited by the corresponding side baffle 11 to prevent axial movement. The outer circumference of the rope drive wheel 13 is provided with a rope groove for winding the operating rope. The surface of the rope groove is provided with anti-slip texture to effectively prevent the rope from slipping during pulling. A rope wheel axle 14 is coaxially fixed to the axis of the rope drive wheel 13. The rope wheel axle 14 is fixedly connected to the rope drive wheel 13 and rotates synchronously. One end of the rope wheel axle 14 passes through the mounting cavity and connects to the reduction assembly. Its diameter is designed according to the required torque to ensure sufficient strength. The support frame 1 is provided with a rope buckle 4 corresponding to the rope drive wheel 13. The rope buckle 4 includes a rotating wheel 5. The rope contacts the rotating wheel 5, and the rotating wheel 5 rotates as the rope moves, changing the direction of rope transmission and making the infeed and outfeed smoother.

[0036] Reference Figure 2 , Figure 3 and Figure 4 The output shaft 34 is rotatably inserted into the baffle 11 of the housing 10 near the hovering assembly. One end of the output shaft 34 extends into the mounting cavity and connects to the hovering assembly, while the other end is used to connect to the louver actuator.

[0037] Reference Figure 6 , Figure 7 and Figure 8 The reduction gear assembly, located within the mounting cavity, includes a sun gear 21, an idler gear 22, a ring gear 23, and a gear carrier 24, forming a planetary gear transmission structure. The sun gear 21 is a spur gear. It is coaxially fixed to one end of the rope wheel shaft 14 that extends into the mounting cavity and rotates synchronously with the rope wheel shaft 14. The ring gear 23 is an internal ring gear 23, fixed to the inner surface of the outer casing 10 and stationary relative to it, with its tooth surfaces facing the inside of the mounting cavity. The ring gear 23 and the outer casing 10 are integrally injection molded to ensure no relative rotation occurs during operation. The module of the ring gear 23 is the same as that of the sun gear 21 to ensure normal meshing transmission.

[0038] Reference Figure 6 , Figure 7 and Figure 8The system includes several idler gears 22, preferably three in this embodiment, evenly distributed around the circumference of the sun gear 21, and meshing with the external teeth of the sun gear 21 and the internal teeth of the gear ring 23. The module of the idler gears 22 is the same as that of the sun gear 21 and the gear ring 23. The gear frame 24 includes two parallel circular rotating parts 241, which are fixedly connected by several connecting shafts 242 to form a frame. In this embodiment, three connecting shafts 242 are provided, each corresponding to one of the idler gears 22. The gear frame 24 is injection molded from high-strength engineering plastic, possessing good strength and self-lubricating properties. The gear frame 24 rotates with the rope wheel axle 14 via the rotating parts 241. The idler gears 22 are rotatably mounted on the connecting shafts 242, and can rotate on their own axis while revolving around the rope wheel axle 14 with the gear frame 24, thus realizing the speed reduction transmission function of the planetary gear system.

[0039] Reference Figure 6 , Figure 7 and Figure 8 When the rope drive wheel 13 rotates, it drives the rope wheel axle 14 and the sun wheel 21 to rotate synchronously. Since the sun wheel 21 meshes with the idler wheel 22, it drives the idler wheel 22 to rotate. Simultaneously, because the gear ring 23 is fixed, and the idler wheel 22 meshes with it, the idler wheel 22, while rotating, also revolves along the internal teeth of the gear ring 23. The revolving motion of the idler wheel 22 drives the wheel frame 24 to rotate around the axis of the rope wheel axle 14 via the connecting shaft 242. During this process, the rotational speed of the wheel frame 24 is lower than the rotational speed of the sun wheel 21, thus achieving a deceleration effect.

[0040] Reference Figure 3 , Figure 9 and Figure 10 The hovering assembly is located in the mounting cavity near the output shaft 34 and includes a drive arc plate 31, a driven arc plate 33, a sleeve 35, and a one-way self-locking spring 32. The drive arc plate 31 is fixed to the end face of the rotating part 241 on the side of the wheel frame 24 away from the rope drive wheel 13. The driven arc plates 33 correspond one-to-one with the drive arc plates 31 and are spaced apart, forming a circular space. The driven arc plates 33 are coaxially fixed to the end of the output shaft 34 that extends into the mounting cavity. A pre-reserved gap between the drive arc plate 31 and the corresponding driven arc plate 33 forms a drive groove 36. The width of the drive groove 36 is slightly larger than the thickness of the drive handle 322 to ensure that the drive handle 322 can move flexibly within the drive groove 36 without generating excessive impact and noise.

[0041] Reference Figure 3 , Figure 9 and Figure 10A sleeve shaft 12 protrudes from the baffle 11 near the output shaft 34 of the outer casing 10 toward the enclosed space. The sleeve shaft 12 and the baffle 11 are integrally formed. The sleeve 35 is interference-fitted onto the sleeve shaft 12 and is located within the enclosed space. The one-way self-locking spring 32 includes a cylindrical helical spring body 321 and drive handles 322 integrally formed at both ends. The spring body 321 is tightly fitted around the outer periphery of the sleeve 35, and its inner diameter is slightly smaller than the outer diameter of the sleeve 35. In the free state, there is a slight interference fit between the spring body 321 and the sleeve 35 to ensure a certain frictional force in the initial state. The two drive handles 322 extend radially along the spring body 321 and are respectively inserted into the two drive slots 36, contacting and engaging with the drive arc plate 31 and the driven arc plate 33. When the one-way self-locking spring 32 rotates along the helical direction of the spring body 321 (i.e., the tightening direction), the spring body 321 will radially contract due to centrifugal force and the characteristics of the helical structure, increasing the interference fit between it and the sleeve 35 and causing a sharp increase in friction. When the friction reaches a certain value, the spring body 321 and the sleeve 35 will lock together, preventing further relative rotation and thus achieving the locking function. Conversely, when the one-way self-locking spring 32 rotates in the opposite direction of the helical direction (i.e., the relaxation direction), the spring body 321 will radially expand due to the characteristics of the helical structure, increasing the gap between it and the sleeve 35, significantly reducing or even eliminating the friction. In this case, the spring body 321 can rotate freely relative to the sleeve 35 without producing a locking effect.

[0042] The detailed implementation principle of this application's embodiments is as follows: Lifting Operation: When the user needs to raise the blinds, they pull the operating rope connected to the rope drive wheel 13 upwards. The rope drives the rope drive wheel 13 to rotate clockwise (viewed from the output shaft 34). The rope drive wheel 13 drives the sun gear 21 to rotate clockwise synchronously via the rope wheel axle 14. Since the sun gear 21 meshes with the idler gears 22, the sun gear 21 drives the three idler gears 22 to rotate counterclockwise. At the same time, since the gear ring 23 is fixed, and the idler gears 22 mesh with the gear ring 23, the idler gears 22 will also revolve clockwise along the internal teeth of the gear ring 23 while rotating counterclockwise. The clockwise revolution of the idler gears 22 drives the wheel frame 24 to rotate clockwise around the axis of the rope wheel axle 14 via the connecting shaft 242. The clockwise rotation of the wheel frame 24 drives the drive arc plate 31 to rotate clockwise synchronously. The drive arc plate 31 pushes the drive handle 322 on the right side, causing the one-way self-locking spring 32 to rotate in the relaxed direction of its helix. At this time, the spring body 321 expands radially, the gap between it and the sleeve 35 increases, the friction disappears, and the one-way self-locking spring 32 can rotate freely. The driving arc plate 31 continues to rotate, pushing the driven arc plate 33 to rotate clockwise through the driving handle 322 on the right. The driven arc plate 33 drives the output shaft 34 to rotate clockwise, and finally drives the louver blades to rise through the louver actuator.

[0043] During the ascent, the deceleration mechanism effectively controls the rising speed of the blinds, even if the user pulls the rope quickly, preventing operational inconvenience and safety hazards caused by excessive speed. Furthermore, the deceleration mechanism allows users to easily raise the blinds with minimal pulling force, significantly reducing operational effort and improving the user experience.

[0044] Lowering Operation: When the user needs to lower the blinds, pulling down the operating rope causes the rope drive wheel 13 to rotate counterclockwise. The rope drive wheel 13 drives the sun wheel 21 to rotate counterclockwise synchronously via the rope wheel axle 14. The sun wheel 21 drives the idler wheel 22 to rotate clockwise. Since the gear ring 23 is fixed, the idler wheel 22 revolves counterclockwise along the inner teeth of the gear ring 23, thereby driving the wheel frame 24 to rotate counterclockwise. The counterclockwise rotation of the wheel frame 24 drives the drive arc plate 31 to rotate counterclockwise synchronously. The drive arc plate 31 pushes the drive handle 322 on the left side, causing the one-way self-locking spring 32 to rotate along its spiral relaxation direction. At this time, the spring body 321 expands radially, the gap between it and the sleeve 35 increases, the friction disappears, and the one-way self-locking spring 32 can rotate freely. The drive plate 31 continues to rotate, and the drive handle 322 on the left pushes the driven plate 33 to rotate counterclockwise. The driven plate 33 drives the output shaft 34 to rotate counterclockwise, and finally drives the louver blades to descend through the louver actuator.

[0045] During descent, the louvers would normally descend rapidly due to their own gravity. However, the deceleration assembly, through the deceleration effect of the planetary gear system and the self-locking function of the one-way self-locking spring 32, effectively controls the descent speed, keeping it within a stable and safe range. This not only avoids noise and impact damage caused by rapid descent but also greatly improves operational safety, making it especially suitable for families with elderly people and children.

[0046] Hovering mode: When the user raises the louvers to the target height and stops pulling the rope, the wheel frame 24 and the drive arc plate 31 also stop rotating. At this time, the louver blades tend to continue descending under their own weight. This tendency is transmitted to the output shaft 34 through the actuator, causing the output shaft 34 to generate a reverse rotation torque. The reverse rotation of the output shaft 34 drives the driven arc plate 33 to rotate synchronously. The driven arc plate 33 pushes the drive handle 322 on the left side, causing the one-way self-locking spring 32 to rotate along its spiral tightening direction.

[0047] As the one-way self-locking spring 32 rotates in the tightening direction, the spring body 321 contracts radially, increasing the interference fit between it and the sleeve 35, and the friction increases sharply. When the friction reaches or exceeds the torque generated by the weight of the louver, the spring body 321 and the sleeve 35 lock together and cannot continue to rotate relative to each other. This prevents the driven arc plate 33 from continuing to rotate through the drive handle 322 on the left, ultimately locking the output shaft 34 and allowing the louver to be stably suspended in any position.

[0048] When the user needs to readjust the height of the blinds, simply pull the operating rope. Through the coordinated action of the deceleration and suspension components, the blinds can be easily raised, lowered, and re-suspended, making the operation simple and convenient.

[0049] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An embedded control head suitable for venetian blinds, characterized in that, It includes a housing (10), a rope drive wheel (13), and an output shaft (34); the housing (10) is a mounting base, and inside it is provided a deceleration component for reducing the transmission speed and a hovering component for enabling the louver to hover at any position; the rope drive wheel (13) is connected to the deceleration component to input external operating force, the deceleration component is connected to the hovering component through a wheel frame (24), and the hovering component is connected to the output shaft (34) to transmit the decelerated power to the louver actuator.

2. The embedded head for venetian blinds according to claim 1, characterized in that, The housing (10) has baffles (11) fixedly installed at both ends along the axial direction of the output shaft (34). The rope drive wheel (13) is installed at the end of the housing (10) away from the output shaft (34) and is axially limited by the baffles (11). The rope drive wheel (13) is also coaxially fixedly connected to a rope wheel shaft (14). The deceleration assembly includes a sun gear (21), which is fixedly installed at the end of the rope wheel shaft (14) away from the rope drive wheel (13).

3. An embedded control head suitable for venetian blinds according to claim 2, characterized in that, The wheel frame (24) is rotatably placed inside the housing (10). The reduction assembly also includes an idler wheel (22) and a gear ring (23). The idler wheel (22) is provided in a plurality of evenly distributed manner. The gear ring (23) is fixedly installed on the inner surface of the housing (10). The side of the idler wheel (22) away from the gear ring (23) is engaged with the sun gear (21) through tooth meshing. The side of the idler wheel (22) close to the gear ring (23) is engaged with the gear ring (23) through tooth meshing.

4. An embedded control head suitable for venetian blinds according to claim 3, characterized in that, The gear ring (23) and the outer shell (10) are fixed in place. The wheel frame (24) includes two parallel rotating parts (241). The two rotating parts (241) are fixedly connected by a number of connecting shafts (242). The wheel frame (24) is rotatably mounted on the rope wheel axle (14) through the rotating parts (241). A number of idler wheels (22) are rotatably mounted on the connecting shafts (242).

5. An embedded control head suitable for venetian blinds according to claim 4, characterized in that, The hovering assembly includes a drive arc plate (31) and a driven arc plate (33). The drive arc plate (31) is fixedly disposed on the end face of the rotating part (241) of the wheel frame (24) on the side away from the rope drive wheel (13). The output shaft (34) is coaxially fixedly connected to the driven arc plate (33).

6. An embedded control head suitable for venetian blinds according to claim 5, characterized in that, The hovering assembly also includes a sleeve (35). A sleeve shaft (12) is provided on the baffle (11) of the outer shell (10) near the output shaft (34) and protrudes toward the driving arc plate (31) and the driven arc plate (33). The sleeve shaft (12) extends into the circular space formed by the driving arc plate (31) and the driven arc plate (33). The sleeve (35) is interference-fitted onto the sleeve shaft (12).

7. An embedded control head suitable for venetian blinds according to claim 6, characterized in that, The sleeve (35) is tightly fitted with a one-way self-locking spring (32) on its outer periphery. The one-way self-locking spring (32) includes a cylindrical spiral spring body (321) and a drive handle (322) integrally formed on the two spiral ends of the spring body (321). The two drive handles (322) extend outward along the radial direction of the spring body (321) and the extension direction is perpendicular to the axial direction of the spring body (321).

8. An embedded head suitable for venetian blinds according to claim 7, characterized in that, A gap is provided between the driving arc plate (31) and the driven arc plate (33) to form a driving groove (36). The two driving handles (322) are respectively inserted into the driving groove (36). When the blade is suspended, the driving handles (322) contact and cooperate with the driven arc plate (33).

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