The disclosure relates to a blind assembly and a winding device thereof.
A conventional blind usually has a cord operable to pull up or down a shade thereof. The cord may dangerously entangle with a child who plays with it, so cordless blinds have been provided in recent years. Referring to
The first seat 11 has two spaced-apart posts 111, 112. The winding device 13 has a cover 131 disposed at the inner side of the first seat 11, a roller 133 rotatably disposed on the post 112, a linking member 134 interconnecting the roller 133 and the shaft 14, and an S-shaped spring 132 having an end that is connected fixedly to the post 111 and an opposite end that is connected fixedly to the roller 133, such that rotation of the roller 133 twists the S-shaped spring 132. Since a resilient force of the S-shaped spring 132 when being twisted is equal to the weight of an unwound portion of the shade 15, the shade 15 can be pulled up or down cordlessly to any desired extent.
The conventional cordless blind 1 enables the shade 15 to maintain at the desired extent and improves safety of use. However, referring to
Therefore, an object of the disclosure is to provide a blind assembly that can reduce the light leakage gap associated with the abovementioned prior art.
Accordingly, the blind assembly includes first and second side seats spaced apart from each other, a winding shaft, a shade member, and a winding device. The winding shaft has an end mounted rotatably to the second side seat, and that is formed with an internal passage. The shade member is wound on the winding shaft. The winding device has a fixing unit, a coupling barrel, and a scroll spring. The fixing unit has a fixing portion that is non-rotatably disposed on the first side seat, and a spring-mounting portion that extends in a direction opposite to the fixing portion. The coupling barrel is disposed in the internal passage, is co-rotatable with the winding shaft, is rotatable relative to the fixing unit, and has a barrel wall that defines a receiving space receiving the spring-mounting portion. The scroll spring is disposed in the coupling barrel, and has a fixing end disposed on the spring-mounting portion, and a connecting end disposed on the barrel wall of the coupling barrel, such that rotation of the coupling barrel relative to the fixing unit generates a resilient force of the scroll spring for retracting the shade member.
Another object of the disclosure is to provide a winding device that can be connected to a blind assembly.
Accordingly, the winding device is adapted to be connected to a blind assembly for disposing a winding shaft on a first side seat. The winding shaft is formed with an internal passage. The winding device includes a fixing unit, a coupling barrel, and a scroll spring. The fixing unit has a fixing portion adapted to be non-rotatably disposed on the first side seat, and a spring-mounting portion extending in a direction opposite to the fixing portion. The coupling barrel is adapted to be disposed in the internal passage and co-rotatable with the winding shaft. The coupling barrel is rotatable relative to the fixing unit, and has a barrel wall that defines a receiving space receiving the spring-mounting portion. The scroll spring is disposed in the coupling barrel. The scroll spring has a fixing end disposed on the spring-mounting portion, and a connecting end disposed on the barrel wall, such that rotation of the coupling barrel relative to the fixing unit generates a resilient force of the scroll spring that is adapted for retracting a shade member.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings, of which:
Referring to
The winding device 20 has a coupling barrel 3, a fixing unit 4, a scroll spring 5, an end cover 6, and a pin 7.
The coupling barrel 3 is disposed in the internal passage 231, and is co-rotatable with the winding shaft 23. In this embodiment, the coupling barrel 3 has a barrel wall 31 defining a receiving space 32. The barrel wall 31 has a hollow main portion 311, an annular outer portion 312 extending outwardly from the main portion 311 and being proximate to the first side seat 21, two first pin holes 315 angularly spaced apart from each other and extending through the main portion 311 and the outer portion 312, two first spring grooves 316 formed in the main portion 311 and angularly spaced apart from each other, and four hook grooves 317 formed in the main portion 311 and being distal from the outer portion 312. The barrel wall 31 further has an annular inner portion 313 extending inwardly from the main portion 311, and that has a shoulder part 314 projecting inwardly into the receiving space 32. Each of the spring grooves 316 has an entrance 318 that is formed at an end of the main portion 311 which is opposite to the outer portion 312.
In this embodiment, the fixing unit 4 includes a fixing seat 41, and a spring-mounting seat 42 coupled fixedly to the fixing seat 41. The fixing seat 41 has a base plate portion 411 disposed outside of and abutting against the barrel wall 31 of the coupling barrel 3, a fixing portion 412 extending from the base plate portion 411 and fittingly and non-rotatably engaging the positioning hole 211 of the first side seat 21, a projecting portion 413 extending from the base plate portion 411 into the receiving space 32 of the coupling barrel 3, a collar portion 410 extending from the base plate portion 411 toward the receiving space 32 and surrounding the projecting portion 413, and four hook portions 414 extending from the collar portion 410, surrounding the projecting portion 413, and hooking the shoulder part 314 of the inner portion 313 of the barrel wall 31 of the coupling barrel 3, such that the barrel 31 is rotatable relative to the fixing unit 4. The base plate portion 411 has a second pin hole 415. The pin 7 is U-shaped. The projecting portion 413 of the fixing seat 41 has an engaging hole 416.
The spring-mounting seat 42 has an abutting portion 421 abutting against the projecting portion 413 of the fixing seat 41, an engaging portion 422 extending from the abutting portion 421 and engaging fixedly the engaging hole 416 of the fixing seat 41, and a spring-mounting portion 423 extending from the abutting portion 421 in a direction opposite to the fixing portion 412 of the fixing seat 41, and received in the receiving space 32 of the coupling barrel 3. In this embodiment, the spring-mounting portion 423 has two second spring grooves 424, but the spring-mounting portion 423 may have only one second spring groove 424 in other embodiments.
Referring to
The end cover 6 has a circular end wall 61, and four cover hooks 62 extending from the end cover 61 and respectively engaging the hook grooves 317 of the coupling barrel 3 such that the end cover 6 is co-rotatable with the barrel wall 31. The end wall 61 of the end cover 6 has a connecting hole 611 engaged rotatably with the spring-mounting portion 423 of the spring-mounting seat 42.
Referring to
Referring to
Specifically, when the winding device 20 is mounted on the blind assembly 2, the fixing portion 412 of the fixing seat 41 extends out of the internal passage 231 of the winding shaft 23. The remainder of the winding device 20, which is a significant portion of the winding device 20, is received inside the internal passage 231, so that one lateral side of the shade member 24 which is proximate to the winding device 20 would be relatively close to a corresponding one of the window sides 251 of the window 25, that is, a light leakage gap that would be formed between the shade member 24 and the respective one of the window sides 251 can be reduced.
Referring to
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects.
While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that his disclosure is not limited to the disclosed embodiment 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.