Self-hovering winder

Abstract

The utility model belongs to the technical field of automatic rolling mechanisms of roller shutters, and particularly relates to a self-hovering rolling device which comprises a supporting middle shaft and a rotating sleeve, the rotating sleeve is rotationally connected to the supporting middle shaft in series, a plurality of spring partition bins are arranged on the rotating sleeve along the supporting middle shaft, and clockwork springs are installed in the spring partition bins. One end of the inner side of the clockwork spring is fixedly connected with the supporting middle shaft, and one end of the outer side of the clockwork spring is fixedly connected with the spring partition bin. According to the self-hovering winder, the clockwork springs are used for pulling the roller shutter, the design of the clockwork springs is convenient to match with the number and the number of turns of the springs to correspond to balance weight of the roller shutter, the weight of the balance weight at the bottom of the roller shutter is equal to the elastic force of the clockwork springs, and hovering of the roller shutter at any position is achieved. The multi-piece clockwork spring is convenient to produce and install, and the situation that the whole spring needs to be scrapped due to breakage of a few flaws is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of automatic roller shutter winding mechanism, and more specifically, to a self-stopping winding device. Background Technology

[0002] Roller blinds are aesthetically pleasing and simple, suitable for sun shading windows in offices and homes, especially for large glass curtain walls. When the blind fabric is lowered, it softens indoor light, preventing direct sunlight and achieving excellent sun shading. When raised, its size is very small and it is hidden at the top of the building opening, making it difficult to notice. Roller blind fabrics are available in semi-blackout, semi-transparent, and blackout varieties, which can be selected according to the window location and usage. Currently, most roller blinds on the market are manual, which has the advantages of low cost, easy installation, and durability. The roller blind mechanism is an accessory for roller blinds, enabling the raising and lowering of the blinds.

[0003] Traditional roller blind structures, as shown in patent document CN201920393417.7 entitled "Roller Blind for Raising and Lowering Roller Blinds," include a first roller blind device for supporting one end of the roller blind and a second roller blind device for supporting the roller blind. The first roller blind device includes a positioning sleeve; a rotating sleeve, partially inserted into the positioning sleeve and rotatable relative to the positioning sleeve; a first bearing member disposed between the rotating sleeve and the positioning sleeve; a fixing member screwed to the rotating sleeve, which can move to one side when the rotating sleeve rotates in one direction; and an anti-rotation structure, which allows the rotating sleeve to rotate only in one direction. The second roller blind device includes a connecting member for supporting the roller blind; a rotating gear, anti-rotatingly connected to the connecting member and used to drive the connecting member to rotate; a driving member for driving the rotating gear to rotate; a base movably connected to the connecting member; and a second bearing member disposed between the base and the rotating gear.

[0004] However, the aforementioned roller shutter requires manual pulling of the drive mechanism when operating to raise and lower, which is cumbersome and slow, leaving considerable room for improvement. Utility Model Content

[0005] To address the problem that current roller blinds require manual operation to control their retraction and descent, which is cumbersome, time-consuming, and labor-intensive, a self-stopping rewinder is provided.

[0006] The self-suspending rewinder includes a support shaft and a rotating sleeve. The rotating sleeve is rotatably connected to the support shaft. Multiple spring compartments are arranged along the support shaft on the rotating sleeve. Each spring compartment is equipped with a spring. One end of the spring is fixedly connected to the support shaft, and the other end is fixedly connected to the spring compartment. A safety pin is connected to the front end of the rotating sleeve, penetrating the rotating sleeve and the support shaft.

[0007] Furthermore, the width, thickness, and number of coils of the spring are all equal.

[0008] Furthermore, multiple positioning screw holes are vertically arranged on the support central shaft, and one inner end of the spring is connected to the positioning screw holes by bolts.

[0009] Furthermore, one outer end of the spring is bent into a U-shaped groove, and an arc-shaped baffle is provided on the spring compartment, with the U-shaped groove sleeved on the arc-shaped baffle.

[0010] Furthermore, both the front and rear ends of the supporting central shaft protrude from the rotating sleeve.

[0011] Furthermore, a square protrusion is provided at the front end of the supporting central shaft.

[0012] Furthermore, the front end of the rotating sleeve is provided with a rotation direction indicator.

[0013] Furthermore, the spring spacer includes two symmetrical vertical baffles, each with a central through hole in the middle, and the spring spacer is integrally formed with the rotating sleeve.

[0014] Furthermore, a cylindrical outer cover is sleeved around the outside of the rotating sleeve, and a support baffle is provided at the front end of the rotating sleeve corresponding to the front opening of the cylindrical outer cover. The area of ​​the support baffle is larger than the area of ​​the front opening of the cylindrical outer cover.

[0015] Furthermore, the inner side of the cylindrical outer cover is provided with reinforcing ribs parallel to the supporting central axis, and the side of the rotating sleeve is provided with rib grooves corresponding to the reinforcing ribs.

[0016] The advantages of this utility model are:

[0017] 1. Roller blinds using this type of retractor can be pulled out and suspended at any position according to the user's operation. The roller blinds are easy to raise, lower, and pull out, and the operation speed is fast.

[0018] 2. The structure is relatively simple, making it easy to assemble and select the appropriate bottom counterweight for the roller shutter.

[0019] 3. The machining precision requirements for the spring are relatively low, the product is not easily damaged, and the service life is relatively long.

[0020] 4. The structure occupies a small volume, making it easy to popularize and apply. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the self-suspending winder after the cylindrical outer casing has been removed.

[0023] Figure 2 A schematic diagram of the self-suspending winder after removing the spring and cylindrical cover;

[0024] Figure 3 Detailed structural diagram of the supporting central shaft and rotating sleeve;

[0025] Figure 4 A side perspective view of the self-hovering rewinder;

[0026] Figure 5 This is a schematic diagram of a self-stopping rewinder assembled on a roller shutter.

[0027] Attached image labels:

[0028] 1. Supporting central shaft; 101. Positioning screw hole; 102. Square protrusion; 2. Rotating sleeve; 201. Direction indicator; 202. Supporting baffle; 203. Rib groove; 3. Spring compartment; 301. Vertical baffle; 302. Arc-shaped baffle; 303. Central shaft through hole; 4. Clockwork spring; 401. U-shaped slot; 5. Safety pin; 6. Cylindrical outer cover; 601. Reinforcing rib; 7. Roller blind central shaft; 8. Roller blind fabric; 9. Counterweight bar. Detailed Implementation

[0029] To address the problem that current roller blinds require manual operation to control their retraction and descent, which is cumbersome, time-consuming, and labor-intensive, a self-stopping rewinder is provided.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] It should be noted that the terms such as "inner", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as part of the scope of implementation of this utility model, as stated above.

[0032] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

[0033] like Figures 1 to 5 As shown, this embodiment provides a self-hovering rewinder, including a supporting central shaft 1 and a rotating sleeve 2. The rotating sleeve 2 is rotatably connected to the supporting central shaft 1. Multiple spring compartments 3 are arranged along the supporting central shaft 1 on the rotating sleeve 2. Each spring compartment 3 is equipped with a spring 4. One end of the spring 4 is fixedly connected to the supporting central shaft 1, and the other end is fixedly connected to the spring compartment 3. A safety pin 5 that passes through the rotating sleeve 2 and the supporting central shaft 1 is connected to the front end of the rotating sleeve 2.

[0034] The central support shaft 1 is used to fix the roller blind to the building structure, such as the window frame, while the rotating sleeve 2 is used to connect the top of the rolled-up blind. When the blind fabric 8 is pulled down and unfolded, the spring 4 is simultaneously stretched and unfolded, generating a restoring force on the blind. At this time, a counterweight 9 is installed at the bottom of the blind to reduce the elasticity, allowing the blind to be suspended in any position. The design of multiple springs 4 reduces the precision requirements of a single spring and avoids damage to the entire winding unit due to spring wear, thus improving service life and equipment reliability. All springs 4 are constant force springs to ensure stable lifting and lowering of the blind. The spring divider 3 separates each spring 4, preventing collisions and interference between them. The safety pin 5 locks the rotating sleeve 2 and spring 4 before the winding unit is put into use, preventing accidental shaking and wear, and improving structural stability.

[0035] The width, thickness, and number of coils of the spring 4 are all equal. A standardized spring 4 is easy to produce, has low manufacturing costs, and facilitates the calculation of the counterweight. Specifically, according to Hooke's Law, the formula for the elastic force of a constant-force spring is F = (σ⋅r⋅t) / R, where σ is the tensile strength of the material, r is the average radius of the spring, t is the thickness of the spring, and R is the average of the outer and inner diameters of the spring. First, the approximate elastic force of the winding mechanism is calculated, and then the accurate weight of the counterweight rod 9 can be determined through assembly testing.

[0036] Multiple positioning screw holes 101 are vertically arranged on the supporting central shaft 1. One inner end of the spring 4 is bolted to the positioning screw hole 101. The outer end of the spring 4 is bent into a U-shaped groove 401. An arc-shaped baffle 302 is provided on the spring spacer 3, and the U-shaped groove 401 is fitted onto the arc-shaped baffle 302. The supporting central shaft 1 and the spring 4 are fixedly connected by bolts, which ensures stable positioning and facilitates assembly and disassembly. The other end of the spring 4 is directly fitted onto the spring spacer 3, which also facilitates assembly and disassembly. Therefore, the spring 4 in this embodiment has low assembly and maintenance difficulty and a long service life.

[0037] Both ends of the supporting central shaft 1 protrude from the rotating sleeve 2. The supporting central shaft 1 protruding from both ends can provide stable support for the rotating sleeve 2, preventing the rotating sleeve 2 from shaking, jamming, or even falling off during operation, thereby improving structural stability.

[0038] A square protrusion 102 is provided at the front end of the support shaft 1. The square protrusion 102 can improve the installation stability of the support shaft 1 on building structures such as window frames, and prevent the support shaft 1 from slipping and loosening due to the force from the spring 4 and the roller blind structure.

[0039] The front end of the rotating sleeve 2 is provided with a rotation direction mark 201. Since the rotation direction of the spring 4 may be clockwise or counterclockwise, the direction mark 201 is provided to avoid the conflict caused by the operator reversing the rotation direction of the left and right winders when both ends of the spool are installed.

[0040] The spring spacer 3 includes two symmetrical vertical baffles 301, each with a central through hole 303 in the middle. The spring spacer 3 and the rotating sleeve 2 are integrally formed. The spring spacer 3, integrally formed with the rotating sleeve 2, has a simple structure and high strength.

[0041] The rotating sleeve 2 is fitted with a cylindrical outer cover 6. A support baffle 202 is positioned at the front end of the rotating sleeve 2, corresponding to the front opening of the cylindrical outer cover 6. The area of ​​the support baffle 202 is larger than the area of ​​the front opening of the cylindrical outer cover 6. The support baffle 202, in conjunction with the cylindrical outer cover 6, encloses the internal structure, preventing damage from external impacts and providing waterproofing and dustproofing, allowing the roller shutter to be used in environments connected to the outdoors. If the installation location is a purely indoor environment without external connectivity, the cylindrical outer cover 6 can be omitted to reduce equipment costs.

[0042] The inner side of the cylindrical outer cover 6 is provided with reinforcing ribs 601 parallel to the supporting central axis 1, and the side of the rotating sleeve 2 is provided with rib grooves 203 corresponding to the reinforcing ribs 601. The reinforcing ribs 601 can improve the impact resistance of the cylindrical outer cover 6 and can improve the structural assembly stability in conjunction with the rib grooves 203.

[0043] The specific application method of this embodiment is as follows:

[0044] 1. During equipment installation, first, insert the retractor into the central shaft 7 of the roller blind and fix it in place. Then, fix the top of the roller blind fabric 8 with the counterweight rod 9 at the bottom to the central shaft 7. Completely roll up and retract the roller blind fabric 8 to the outside of the central shaft 7, ensuring that the counterweight rod 9 points downwards. Afterwards, use the square protrusion 102 on the retractor to fix the entire roller to the building to complete the installation, and then pull out the safety pin 5.

[0045] 2. When using the equipment, the user can control the opening and closing of the roller shutter by grasping the counterweight rod 9 and pulling it up and down. The counterweight rod 9 will automatically stop when the user releases the counterweight rod 9.

[0046] It is worth mentioning that the left and right ends of the counterweight rod 9 can be fitted into the vertical guide rail to improve the operating stability of the equipment and prevent the roller shutter from swaying due to wind.

[0047] The above description is a further detailed explanation of the present utility model in conjunction with specific preferred embodiments. It should not be assumed that the specific implementation of the present utility model is limited to these descriptions. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present utility model.

Claims

1. A self-suspending rewinder, characterized in that, It includes a supporting central shaft and a rotating sleeve. The rotating sleeve is rotatably connected to the supporting central shaft. Multiple spring compartments are arranged along the supporting central shaft on the rotating sleeve. Each spring compartment is equipped with a spring. One end of the spring is fixedly connected to the supporting central shaft, and the other end is fixedly connected to the spring compartment. A safety pin is connected to the front end of the rotating sleeve, passing through the rotating sleeve and the supporting central shaft.

2. The self-hovering rewinder according to claim 1, characterized in that, The width, thickness, and number of coils of the spring are all equal.

3. The self-hovering rewinder according to claim 1, characterized in that, Multiple positioning screw holes are vertically arranged on the central support shaft, and one end of the spring is connected to the positioning screw holes by bolts.

4. The self-hovering rewinder according to claim 3, characterized in that, One end of the spring is bent into a U-shaped groove, and an arc-shaped baffle is provided on the spring compartment. The U-shaped groove is sleeved on the arc-shaped baffle.

5. The self-hovering rewinder according to claim 1, characterized in that, Both ends of the supporting central shaft protrude from the rotating sleeve.

6. The self-hovering rewinder according to claim 5, characterized in that, A square protrusion is provided at the front end of the supporting central shaft.

7. The self-hovering rewinder according to claim 6, characterized in that, The front end of the rotating sleeve is marked with a rotation direction indicator.

8. The self-hovering rewinder according to claim 1, characterized in that, The spring spacer includes two symmetrical vertical baffles, each with a central through hole in the middle. The spring spacer and the rotating sleeve are integrally formed.

9. The self-hovering rewinder according to claim 1, characterized in that, The outer side of the rotating sleeve is wrapped with a cylindrical outer cover, and a support baffle is provided at the front end of the rotating sleeve corresponding to the front opening of the cylindrical outer cover. The area of ​​the support baffle is larger than the area of ​​the front opening of the cylindrical outer cover.

10. The self-hovering rewinder according to claim 9, characterized in that, The inner side of the cylindrical outer cover is provided with reinforcing ribs parallel to the supporting central axis, and the side of the rotating sleeve is provided with rib grooves corresponding to the reinforcing ribs.

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