Patent Application
20180347269
The disclosure relates to a winding device, more particularly to a winding device for a blind.
Referring to
Referring to
Therefore, an object of the present disclosure is to provide a winding device for a blind that can alleviate at least one of the drawbacks of the prior arts.
According to this disclosure, a winding device for a blind includes a frame unit, and inner and outer pivot units. The frame unit includes a frame extending along an axial direction, and two pivot seats disposed on the frame and spaced apart from each other along the axial direction. The inner pivot unit includes two limiting members connected pivotally and respectively to the pivot seats, an inner tube connected between the limiting members, and a spring member sleeved on the inner tube and having first and second end portions opposite to each other along the axial direction and respectively connected to the limiting members. The outer pivot unit includes an outer tube sleeved on the spring member and having two opposite ends, and two tubular sleeves each of which is connected between one of the ends of the outer tube and a corresponding one of the limiting members. The tubular sleeves are configured to be driven by a blind body of the blind. When the blind body is moved in an up-down direction, the tubular sleeves are driven by the blind body to rotate, and one of the tubular sleeves drives one of the limiting members to rotate synchronously, but the other one of the tubular sleeves cannot drive the other one of the limiting members to rotate therealong, such that the first and second end portions of the spring member are twisted to provide a resilient restoring force for balancing and positioning the blind body.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which:
Before the present disclosure is described in greater detail, it should be noted herein that like elements are denoted by the same reference numerals throughout the disclosure.
Referring to
The frame unit 4 includes a frame 41 extending along an axial direction (A) and configured to be disposed on top of a blind body (not shown) of the blind, two pivot seats 42 disposed on the frame 41 and spaced apart from each other along the axial direction (A), and two friction adjustment rod units 43, each of which is disposed on a respective one of the pivot seats 42. Each pivot seat 42 includes an upper connecting portion 421 having a pivot hole 420 that extends along the axial direction (A), and a lower connecting portion 422 having two connecting arms 4221 extending along the axial direction (A) and spaced apart from each other in a direction transverse to the axial direction (A). In this embodiment, each friction adjustment rod unit 43 includes a plurality of friction adjustment rods 431 that are inserted between the connecting arms 4221 of the respective pivot seat 42, that are spaced apart from each other along the axial direction (A), and that extend in a direction transverse to the axial direction (A). It should be noted herein that, although a plurality of the friction adjustment rods 431 are exemplified in this embodiment, the number thereof can be adjusted according to actual requirement, and may be one only. Further, a distance between each two adjacent ones of the friction adjustment rods 431 along the axial direction (A) may be equal or different, and the heights of the friction adjustment rods 431 may be same or different. These factors are determined depending on the friction needed.
The inner pivot unit 5 includes two limiting members 51, an inner tube 52, and a spring member 53. The limiting members 51 are connected pivotally and respectively to the pivot seats 42. Each limiting member 51 has a circular body 511, an axle portion 512 protruding from one side of the circular body 511 along the axial direction (A) and inserted into the pivot hole 420 of the respective pivot seat 42, an extension portion 513 extending from the circular body 511 in a direction opposite to the axle portion 512 and having an outer diameter smaller than that of the circular body 511, a circular first protruding block 514 protruding from the extension portion 513 and having an outer diameter smaller than that of the extension portion 513, and a circular second protruding block 515 protruding from the first protruding block 514 and having an outer diameter smaller than that of the first protruding block 514. The first protruding block 514 has a radially extending limiting hole 516. The second protruding block 515 has a diametral notch 517. Two opposite ends of the inner tube 52 are respectively sleeved on the second protruding blocks 515 of the limiting members 51, as shown in
With reference to
The outer pivot unit 6 includes an outer tube 62 sleeved on the central portion 531 of the spring member 53 and having two opposite ends, and two tubular sleeves 61 connected between one of the ends of the outer tube 62 and a corresponding one of the limiting members 51. Specifically, each tubular sleeve 61 has an inner end disposed between one of the ends of the outer tube 62 and a corresponding one of the first and second end portions 532, 533 of the spring member 53, and an outer end sleeved on the extension portion 513 of the corresponding limiting member 51. Each tubular sleeve 61 has an outer diameter tapering from the outer end toward the inner end thereof along the axial direction (A). One of the tubular sleeves 61 is fixed to one of the limiting members 51 using a screw-fastening or press-fit method so as to drive the one of the limiting members 51 to rotate synchronously. The other one of the tubular sleeves 61 is only coaxially sleeved on the other limiting member 51 and cannot drive the other limiting member 51 to rotate therealong. Furthermore, the distance between the limiting members 51 can be adjusted according to the lengths of the inner tube 52, the spring member 53 and the outer tube 62 so as to be beneficial for use in different sizes of blind bodies, so that it has a high multiusability.
In this embodiment, the tubular sleeves 61 shown in
It should be noted herein that since the outer diameter of each tubular sleeve 61 tapers from the outer end toward the inner end thereof, when the tubular sleeves 61 wind the lift cords 7, each lift cord 7 will loop around the respective tubular sleeve 61 from the outer end toward the inner end thereof. As such, the lift cords are smoothly wound around the respective tubular sleeves 61 without entanglement. If the restoring force of the spring member 53 is greater than the weight of the blind body in some special circumstances, the friction between the friction adjustment rods 43 and the lift cords 7 can be used to assist in balancing the weight of the blind body, so that the needed counterweight can be reduced, thereby reducing the cost. Furthermore, by adjusting the number of the friction adjustment rods 43 looped over by each lift cord 7, and by changing the distances among the friction adjustment rods 43 as well as the heights thereof (the closer the distance, the smaller the angle, the larger the friction force), the magnitude of the friction force can be adjusted, so that a stepless adjustment can be made on the blind body for raising or lowering the same. Moreover, in this embodiment, exit points of the lift cords 7 are located between the pivot seats 42. However, in other embodiment, the exit points of the lift cords 7 may be adjusted according to the requirement, and may be located outside of the pivot seats 42, as shown in
Referring to
In sum, the tubular sleeves 61 of this disclosure can cooperate with the lift cords 7 to connect with the blind body, but may be directly connected to the blind body of, for example, a Roman blind, a venetian blind and a shutter blind, so that use of the disclosure is extensive. Further, the lift cords 7 can be dragged to the tubular sleeves 61, so that there is no need to align the tubular sleeves 61 with the exit points of the lift cords 7. Moreover, the spring member 53 is more durable than the conventional spring members. Therefore, the object of this disclosure can be realized.
While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
