The present invention relates to non-pull window blinds and more particularly, to a ladder cord fastening seat for the non-pull window blind.
Common window blinds, such as Venetian window blinds, structurally includes a top beam, a bottom beam, and a plurality of slats. The slats are parallel suspended between the top and bottom beams by two ladder cords. Under the synchronous control of the two ladder cords, the slats will turn properly, so that the indoor lighting can be adjusted at any time.
However, the aforesaid two ladder cords are generally disposed at left and right ends of the slats, so the slats is likely to twist especially when the slats are adjusted to the vertical condition. In order to improve the aforementioned twist phenomenon, one additional ladder cord (i.e. the third ladder cord) may be fastened to the middle of the slats for assisting the left and right ladder cords to turn the slats, the third ladder cord, when being fastened to the top beam, may interfere with the transmission components in the top beam, such as the cord rolling device, thereby increasing the difficulty of installation.
It is an objective of the present invention to provide a ladder cord fastening seat for non-pull window blind, which enables the ladder cord to be fastened at the middle of the window blind without interfering the existing components of the window blind.
To attain the above objective, the present invention provides a ladder cord fastening seat which includes two vertical posts located opposite to each other, and an arc bridge. Each of the vertical posts has a cord inserting hole for a ladder cord to be inserted therethrough. The arc bridge connects the two vertical posts in such a way that an accommodation space is defined by the two vertical posts and the arc bridge.
It can be understood from the above illustration that the ladder cord fastening seat of the invention may be installed in a top beam by the two vertical posts. After the installation, owing that the accommodation space is spared, the ladder cord fastening seat can crossover the transmission components existed in the top beam, such as the cord rolling device. In this way, the ladder cord fastening seat enables the ladder cord to be fastened at the middle of the window blind without interfering the existing structure of the window blind.
Preferably, each of the vertical posts has two positioning walls located opposite to each other, a bottom wall, and an end wall; the bottom wall connects bottom ends of the two positioning walls and has said cord inserting hole; the end wall connects the two positioning walls and the bottom wall; the arc bridge has two first bridging portions located opposite to each other and a second bridging portion connecting the two first bridging portions; each of the first bridging portions connects the positioning walls of the two vertical posts; the second bridging portion connects the end walls of the two vertical posts.
Preferably, each of the positioning walls of the vertical posts is provided on the top end thereof with a positioning recess; each of the bottom walls of the vertical posts is provided on a bottom surface thereof with a positioning protrusion. In this way, the ladder cord fastening seat can employ the positioning recesses and the positioning protrusions to engaged with the top beam.
Preferably, each of the end walls of the vertical posts has a guiding groove communicating with the cord inserting hole, so that two ends of the ladder cord can be pulled to the top surface of the second bridging portion of the arc bridge along the guiding grooves respectively and tied there.
Referring to
Referring to
Each of the vertical posts 20 has two positioning walls 21 located opposite to each other, a bottom wall 23, and an end wall 26. Each of the positioning walls 21 is provided on a top end thereof with a positioning recess 22. The bottom wall 23 connects bottom ends of the two positioning walls 21 and has a cord inserting hole 24 cut through top and bottom surfaces of the bottom wall 23. The bottom wall 23 is further provided on the bottom surface thereof with a positioning protrusion 25 which is hollow-shaped and communicates with the cord inserting hole 24. The end wall 26 connects the two positioning walls 21 and the bottom wall 23 and has a guiding groove 27. The bottom end of the guiding groove 27 directively communicates with the cord inserting hole 24 of the bottom wall 23.
The arc bridge 30 has two first bridging portions 31 located opposite to each other and a second bridging portion 32. Each of the first bridging portions 31 connects the positioning walls 21 of the two vertical posts 20. The second bridging portion 32 connects the two first bridging portions 31, and two ends of the second bridging portion 32 are connected with the top ends of the end walls 26 of the two vertical posts 20 respectively, so that an accommodation space 12, which is arch-shaped, is jointly defined by the two vertical posts 20 and the arc bridge 30. Besides, the top surfaces of the first bridging portions 31 of the arc bridge 30 are located higher than the top surface of the second bridging portion 32.
When being installed in the top beam 40, as shown in
Owing that the cord rolling device 45 is usually disposed at the middle of the top beam 40, the ladder cord fastening seat 10, after being installed in the top beam 40, can crossover the cord rolling device 45 and the accommodation space, which is defined by the two vertical posts 20 and the arc bridge 30, can be utilized to accommodate the cord rolling device 45. After that, as shown in
It can be understood from the above illustration that the ladder cord fastening seat 10 of the invention can avoid interference with the cord rolling device 45 disposed in the top beam 40 by means of the arch-shaped accommodation space 12 defined by the specific structure of the ladder cord fastening seat 10, enabling the ladder cord 47 to be installed at the middle of the window blind successfully without interfering the existed structure of the window blind. In this way, the ladder cord 47 can work with left and right ladder cords at the same time to turn the slats 46, making the turning of the slats 46 more positively and stably.
Number | Date | Country | Kind |
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106137671 | Oct 2017 | TW | national |
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