One-way torsion spring clutch type friction balancer

Abstract

The utility model discloses a one-way torsion spring clutch type friction balancer, which belongs to the technical field of roller shutters and comprises a step type fixing shaft, a one-way torsion spring clutch, a friction resistance sheet, a friction resistance pipe, a reel pipe connecting plug and a limit screw. The friction resistance piece is installed in a fixing groove in the outer wall of the friction resistance pipe, the step type fixing shaft is sleeved with the friction resistance pipe, the one-way torsional spring clutch is located in the friction resistance pipe, and the step type fixing shaft penetrates through the reel pipe connecting plug and is in threaded connection with the limiting screw. The frictional resistance pipe is located in the reel pipe connecting plug, and the frictional resistance piece makes contact with the inner wall of the reel pipe connecting plug. The one-way torsional spring clutch is adopted to provide different friction resistances for the roller shutter brake head so as to meet the resistance requirements of the roller shutter in the ascending and descending processes, so that the balance of the pull-up torque and the pull-down torque is achieved, and the purpose that the roller shutter can accurately stop at which position when being pulled to which position is achieved is achieved.

Description

Technical Field

[0001] This utility model relates to the field of roller blind technology, specifically to a friction balancer. Background Technology

[0002] With concerns about child safety in cordless systems, various countries have enacted laws mandating the use of cordless roller blinds and other sun-shading products. The main driving mechanism of a cordless roller blind system is a torsion spring mounted on the roller tube. By adjusting the upward torque generated by the torsion spring, the upward torque is supposed to balance the downward torque generated by the blind fabric and bottom rail, thus allowing the blind to stop at its designated position. However, in reality, there is always a difference between these two torques, and even with a torsion spring tailored to the specific dimensions of the blind, perfect balance cannot be achieved. Utility Model Content

[0003] The purpose of this invention is to provide a one-way torsion spring clutch-type friction balancer that achieves complete balance between the upward and downward torques, thereby making the stopping position of the roller shutter more precise.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A one-way torsion spring clutch-type friction balancer includes a stepped fixed shaft, a one-way torsion spring clutch, a friction resistance plate, a friction resistance tube, a coiled tube connector, and a limiting screw. The one-way torsion spring clutch is mounted on the stepped fixed shaft. The friction resistance plate is installed in a fixed groove on the outer wall of the friction resistance tube. The friction resistance tube is mounted on the stepped fixed shaft, and the one-way torsion spring clutch is located inside the friction resistance tube. The stepped fixed shaft passes through the coiled tube connector and is threadedly connected to the limiting screw. The friction resistance tube is located inside the coiled tube connector, and the friction resistance plate contacts the inner wall of the coiled tube connector. When the roller shutter moves upward, the coiled tube connector drives the friction resistance tube to rotate, and the friction resistance tube drives the one-way torsion spring clutch, which rotates relative to the stepped fixed shaft. When the roller shutter moves downward, the one-way torsion spring clutch does not rotate relative to the stepped fixed shaft, and the coiled tube connector rotates relative to the friction resistance tube. The friction resistance plate provides frictional resistance to the rotating coiled tube connector.

[0006] Furthermore, the outer wall of the friction resistance tube is provided with a plurality of fixed grooves distributed at intervals along the circumferential direction, and the fixed grooves are provided with the friction resistance plates.

[0007] Furthermore, a snap-fit ​​groove is formed on the inner wall of the friction resistance tube, and one end of the one-way torsion spring clutch is bent outward and extends into the snap-fit ​​groove.

[0008] Furthermore, the snap-fit ​​groove is an elongated snap-fit ​​groove that extends from one end of the friction resistance tube to the other end of the friction resistance tube.

[0009] Furthermore, the groove is parallel to the axis of the friction resistance tube.

[0010] Furthermore, the end of the stepped fixed shaft is provided with a circular limiting baffle.

[0011] Furthermore, the end face of the coiled tube connector is provided with an annular groove, and the circular limiting baffle is located in the annular groove.

[0012] The beneficial effects of this utility model are as follows:

[0013] This application uses a one-way torsion spring clutch to provide different frictional resistances to the roller blind head, so as to meet the resistance requirements of the roller blind during the rising and falling process. At this time, a friction balancer needs to be installed on the roller tube to compensate for the difference between the pulling torque and the pulling torque, so as to achieve the balance between the two, thereby achieving the purpose of the roller blind stopping precisely at the desired position. Attached Figure Description

[0014] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort:

[0015] Figure 1 This is an exploded view of the present invention;

[0016] Figure 2 for Figure 1 The diagram shows the structure of the coiled tube connector.

[0017] Figure 3 for Figure 1 The diagram shows a one-way torsion spring clutch installed inside a friction resistance tube.

[0018] Figure 4 for Figure 3 The diagram shows the structure after the friction resistance tube is inserted into the stepped fixed shaft.

[0019] Figure 5 for Figure 4 The diagram shows the structure after the hose reel connector is installed.

[0020] Figure 6 for Figure 5 The rear view shown.

[0021] In the diagram: 1. Stepped fixed shaft; 2. One-way torsion spring clutch; 3. Friction resistance plate; 4. Friction resistance tube; 5. Reel connector; 6. Limit screw; 7. Circular limit baffle; 8. Fixing groove; 9. Annular groove; 10. Snap-fit ​​groove. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a one-way torsion spring clutch-type friction balancer includes a stepped fixed shaft 1, a one-way torsion spring clutch 2, a friction resistance plate 3, a friction resistance tube 4, a coiled tube connector 5, and a limiting screw 6. The stepped fixed shaft 1 has a circular limiting baffle 7 at its end, and the coiled tube connector 5 has an annular groove 9 on its end face, with the circular limiting baffle 7 located in the annular groove 9. The one-way torsion spring clutch 2 is mounted on the stepped fixed shaft 1. The friction resistance plate 3 is installed in a fixing groove 8 on the outer wall of the friction resistance tube 4. Multiple fixing grooves 8 are spaced circumferentially on the outer wall of the friction resistance tube 4, and the friction resistance plate 3 is disposed within each fixing groove 8. The friction resistance tube 4 is mounted on the stepped fixed shaft 1, and the one-way torsion spring clutch 2 is located inside the friction resistance tube 4. The stepped fixed shaft 1 passes through the coiled tube connector 5 and is threadedly connected to the limiting screw 6. The friction resistance tube 4 is located inside the coiled tube connector 5, and the friction resistance plate 3 is in contact with the inner wall of the coiled tube connector 5.

[0025] A snap-fit ​​groove 10 is formed on the inner wall of the friction resistance tube 4. One end of the one-way torsion spring clutch 2 is bent outward and extends into the snap-fit ​​groove 10. The snap-fit ​​groove 10 is an elongated snap-fit ​​groove that extends from one end of the friction resistance tube 4 to the other end, and the snap-fit ​​groove 10 is parallel to the axis of the friction resistance tube 4. This design facilitates the snap-fit ​​of the end of the one-way torsion spring clutch and also facilitates the installation of the friction resistance tube 4.

[0026] When the roller blind moves upward, the roller tube connector 5 drives the friction resistance tube 4 to rotate, and the friction resistance tube 4 drives the one-way torsion spring clutch 2 to rotate relative to the stepped fixed shaft 1. When the roller blind moves downward, the one-way torsion spring clutch 2 does not rotate relative to the stepped fixed shaft 1, and the roller tube connector 5 rotates relative to the friction resistance tube 4. The friction resistance plate 3 provides friction resistance to the rotating roller tube connector 5 to balance the upward and downward torques.

[0027] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A one-way torsion spring clutch-type friction balancer, characterized in that: The device includes a stepped fixed shaft, a one-way torsion spring clutch, a friction resistance plate, a friction resistance tube, a reel connector, and a limiting screw. The one-way torsion spring clutch is mounted on the stepped fixed shaft. The friction resistance plate is installed in a fixed groove on the outer wall of the friction resistance tube. The friction resistance tube is mounted on the stepped fixed shaft, and the one-way torsion spring clutch is located inside the friction resistance tube. The stepped fixed shaft passes through the reel connector and is threadedly connected to the limiting screw. The friction resistance tube is located inside the reel connector, and the friction resistance plate contacts the inner wall of the reel connector. When the roller shutter moves upward, the reel connector drives the friction resistance tube to rotate, which in turn drives the one-way torsion spring clutch, which rotates relative to the stepped fixed shaft. When the roller shutter moves downward, the one-way torsion spring clutch does not rotate relative to the stepped fixed shaft, while the reel connector rotates relative to the friction resistance tube. The friction resistance plate provides frictional resistance to the rotating reel connector.

2. The one-way torsion spring clutch friction balancer according to claim 1, characterized in that: The outer wall of the friction resistance tube has a plurality of fixed grooves spaced apart along the circumferential direction, and the fixed grooves are provided with the friction resistance plates.

3. The one-way torsion spring clutch friction balancer according to claim 1, characterized in that: The inner wall of the friction resistance tube has a snap-fit ​​groove, and one end of the one-way torsion spring clutch is bent outward and extends into the snap-fit ​​groove.

4. The one-way torsion spring clutch friction balancer according to claim 3, characterized in that: The snap-fit ​​groove is a long strip-shaped snap-fit ​​groove that extends from one end of the friction resistance tube to the other end of the friction resistance tube.

5. The one-way torsion spring clutch friction balancer according to claim 4, characterized in that: The groove is parallel to the axis of the friction resistance tube.

6. The one-way torsion spring clutch friction balancer according to claim 1, characterized in that: The stepped fixed shaft is provided with a circular limiting baffle at its end.

7. The one-way torsion spring clutch friction balancer according to claim 6, characterized in that: The end face of the coiled tube connector is provided with an annular groove, and the circular limiting baffle is located in the annular groove.

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