A window covering extension kit
By designing a special structure for the main track and the secondary track, and using a support component to support and a matching of the bent concave part to position the convex part, the problems of easy scratching and high resistance during the extension and retraction of the curtain track are solved, achieving smooth sliding and improved durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGYUAN LEYOU HOUSEHOLD ARTICLES CO LTD
- Filing Date
- 2018-07-22
- Publication Date
- 2026-05-29
AI Technical Summary
Existing curtain tracks are prone to scratches during extension and retraction, and have significant relative resistance to extension and retraction.
A curtain telescopic kit is designed, which adopts a special structure of main rail and sub-rail. The sub-rail is supported by a support member in the main rail, ensuring that there is a gap between the inner and outer rails. The friction is reduced by matching the bending concave part and the positioning convex part, resulting in low sliding resistance and less scratching.
This design ensures that the subrail is less prone to scratches during the extension and retraction process, and has low sliding resistance, thus improving user comfort and durability.
Smart Images
Figure CN108903569B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of telescopic rails, and in particular to a curtain telescopic kit. Background Technology
[0002] Telescopic rods are widely used in daily life, with curtain rods being the most typical example.
[0003] There are generally two types of telescopic curtain rods: one is a self-locking structure, such as patent ZL002440555, which is a self-locking telescopic rod that uses an expansion self-locking mechanism to extend and lock.
[0004] Another type is the track-like structure that has emerged in recent years, such as the retractable curtain track disclosed in patent ZL201621338752.X. This track includes a large square track, a small square track, and a pulley mechanism. The small square track fits inside the large square track. The large square track includes a first square frame, a connector, and a first mounting component. The small square track includes a second square frame, a second connector, and a second mounting component. The large square track has a first cavity inside, and the small square track has a second cavity inside. The pulley mechanism includes a track pulley, an opening pulley, a pulley mounting block, and a curtain connector. The pulley mechanism moves within the first and second cavities. The small square track can slide within the first cavity. In this invention, the small square track can slide within the large square track, and the user can adjust the length of the small square track within the large square track to achieve the ideal track length according to actual needs.
[0005] The technical solution ZL201621338752.X mentioned above does not solve the problem that when the large square rail and the small square rail are pulled out, the lower surface of the second pulley track of the small square rail is easily scratched.
[0006] In addition, ZL 201420249690.X discloses a retractable track and rollers for curtains. The rollers include a wheel seat and two pulleys connected to both sides. The retractable track includes an outer track and an inner track. Both tracks have a groove-shaped longitudinal section with the groove opening facing downwards. The inner track is movably inserted into the outer track. The groove opening of the outer track has two right-angled bends with right angles facing each other. The groove opening of the inner track has two double-bends with two bends facing each other. The two double-bends correspond to and match the two right-angled bends. The heights of the four tracks are equal. The upper horizontal edge A of the two double-bends is aligned with the upper horizontal edge B of the two right-angled bends.
[0007] In order to make the upper surface of the right-angle bend and the upper surface of the double bend flush, the height of the right-angle bend and the double bend are set to be equal. Therefore, during use, the outer track and the inner track are tightly fitted. As a result, the lower surface of the inner track is also very easy to be scratched during the extension and retraction process. Summary of the Invention
[0008] The purpose of this invention is to provide a curtain telescopic kit, in which the sub-track is not easily scratched and the telescopic resistance between the main track and the sub-track is small.
[0009] The technical solution provided by this invention is as follows: a curtain telescopic kit, including a main rail, a sub-rail disposed within the main rail, and a hanging wheel; both the main rail and the sub-rail have grooves at their lower parts; the lower part of the main rail consists of a pair of outer rails located on both sides of the groove of the main rail; the lower part of the sub-rail consists of a pair of inner rails located on both sides of the groove of the sub-rail and cooperating with the outer rails; the outer rail has a first slide rail at its edge, and the inner rail has a second slide rail at its edge; the hanging wheel slides along the grooves on the first and second slide rails; the upper part of the sub-rail has a pair of first grooves that cooperate with the mounting brackets of an external device; the upper sides of the inner wall of the main rail are provided with support members for supporting the first grooves, and when the upper wall of the first groove contacts the support member, there is a gap between the lower surface of the inner rail and the upper surface of the outer rail.
[0010] In other words, the distance from the upper wall of the first groove to the lower surface of the inner rail is less than the distance from the upper surface of the support to the upper surface of the outer rail.
[0011] In the aforementioned curtain telescopic kit, the first slide rail has a bending recess on the side near the inner rail; the second slide rail has a positioning protrusion extending into the bending recess on one side.
[0012] In the aforementioned curtain telescopic kit, the shapes of the bending recess and the positioning protrusion are matched; when the bending recess and the positioning protrusion are tightly fitted, the upper surfaces of the first slide rail and the second slide rail are flush.
[0013] In the aforementioned curtain telescopic kit, when the bending recess and the positioning protrusion are tightly fitted together, there is a gap between the upper wall of the first groove and the support member.
[0014] In the aforementioned curtain telescopic kit, the support member is a support strip extending along the length of the main track.
[0015] In the aforementioned curtain telescopic kit, the inner wall of the main track is provided with a sound-absorbing part.
[0016] In the aforementioned curtain telescopic kit, the upper part of the main track is provided with a second groove that mates with the mounting bracket of the external device.
[0017] In the aforementioned curtain telescopic kit, the upper wall of the first groove is an inclined surface, and the distance from the position where the upper wall of the first groove contacts the support member to the lower surface of the inner rail is less than the distance from the upper surface of the support member to the upper surface of the outer rail.
[0018] In the aforementioned curtain telescopic kit, the hanging wheel includes a wheel body, a hanging ring, and a connecting plate disposed between the wheel body and the hanging ring; the wheel body is a pair and is slidably engaged with the first slide rail and the second slide rail respectively; the connecting plate passes through the slot.
[0019] The beneficial effects of this invention after adopting the above technical solution are as follows:
[0020] In this curtain telescopic kit, the main rail and the secondary rail do not use the traditional method of fitting together for telescopic movement. In this design, the distance from the upper wall of the first groove to the lower surface of the inner rail is less than the distance from the upper surface of the support to the upper surface of the outer rail. This ensures that during telescopic movement, the secondary rail is supported by the support member, resulting in low sliding resistance. Furthermore, the inner rail on the secondary rail and the outer rail on the main rail will not come into contact, making the secondary rail less prone to scratches. Attached Figure Description
[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention;
[0022] Figure 2 This is a front view of the sub-rail and the main rail of Embodiment 1 of the present invention;
[0023] Figure 3 This is a front view of the mother rail in Embodiment 1 of the present invention;
[0024] Figure 4 This is a front view of the sub-track in Embodiment 1 of the present invention. Detailed Implementation
[0025] The technical solution of the present invention will be further described in detail below with reference to specific embodiments, but this does not constitute any limitation on the present invention.
[0026] Example 1
[0027] like Figure 1-4As shown, a curtain telescopic kit includes a main rail 1 and a sub-rail 2 disposed within the main rail 1, and also includes a hanging wheel 4; both the main rail 1 and the sub-rail 2 have grooves 3 at their lower parts; the lower part of the main rail 1 consists of a pair of outer rails 11 located on both sides of the groove 3 of the main rail 1; the lower part of the sub-rail 2 consists of a pair of inner rails 21 located on both sides of the groove 3 of the sub-rail 2, which cooperate with the outer rails 11; the outer rails 11 have first slide rails 12 at their edges, and the inner rails 21 have second slide rails 22 at their edges; the hanging wheel 4 slides along the grooves 3 on the first slide rails 12 and the second slide rails 22; the upper part of the sub-rail 2 consists of a pair of first grooves 24 that cooperate with the mounting brackets of an external device; the upper sides of the inner wall of the main rail 1 are provided with support members 15 for supporting the first grooves 24, and the distance from the upper wall A of the first groove 24 to the lower surface B of the inner rail 21 is less than the distance from the upper surface C of the support member 15 to the upper surface D of the outer rail 11. This arrangement ensures that when the upper wall A of the first groove 24 contacts the support member 15, there is a gap between the lower surface B of the inner rail 21 and the upper surface D of the outer rail.
[0028] During operation, the hanging wheel 4 includes a wheel body 41, a lifting ring 42, and a connecting plate 43 disposed between the wheel body 41 and the lifting ring 42. The wheel body 41 is a pair disposed on both sides of the connecting plate 43. During operation, the wheel body 41 slides in contact with the first slide rail 12 and the second slide rail 22, and the connecting plate 43 moves in the slot 3.
[0029] Since the distance from the upper wall A of the first groove 24 to the lower surface B of the inner rail 21 is less than the distance from the upper surface C of the support member 15 to the upper surface D of the outer rail 11, there is a gap between the lower surface B of the inner rail 21 and the upper surface D of the outer rail 11. In other words, the lower surface B of the inner rail 21 of the sub-rail 2 will not be scratched during the extension and retraction process. Moreover, during the extension and retraction process, since the support member 15 and the first groove 24 are in contact, the contact area is small, so it is very easy to slide.
[0030] After sliding into position, the mounting bracket engages with the first groove 24 to fix the sub-rail 2 onto the mounting surface of the peripheral device.
[0031] Preferably, the upper part of the main rail 1 is provided with a second groove 13 that cooperates with the mounting bracket of the peripheral device; after sliding into place, the main rail 1 is fixed on the fixing surface of the peripheral device by cooperating with the mounting bracket and the second groove 13.
[0032] To further reduce sliding resistance, the upper wall A of the first groove 24 is an inclined surface. The distance from the point where the upper wall A of the first groove 24 contacts the support 15 to the lower surface B of the inner rail 21 is less than the distance from the upper surface C of the support 15 to the upper surface D of the outer rail 11. In this way, the contact between the first groove 24 and the support changes from surface contact to line contact, resulting in extremely low resistance.
[0033] In this embodiment, the first slide rail 12 has a bent recess 14 on the side near the inner rail 21; the second slide rail 22 has a positioning protrusion 23 extending into the bent recess 14 on one side; when the positioning protrusion 23 is pressed against the bent recess 14, it can prevent the sub-rail 2 from swaying left and right, and also prevent the sub-rail 2 from swaying up and down.
[0034] Preferably, the shapes of the bending recess 14 and the positioning protrusion 23 are matched; when the bending recess 14 and the positioning protrusion 23 are tightly fitted, the upper surface of the first slide rail 12 and the upper surface of the second slide rail 22 are flush.
[0035] In this embodiment, when the bending recess 14 and the positioning protrusion 23 are tightly fitted together, there is a gap between the upper wall of the first groove 24 and the support member.
[0036] Of course, there can be no gap, but without a gap, the frictional resistance during the expansion and contraction process will be relatively large.
[0037] In this embodiment, the support member 15 is a support bar extending along the length direction of the main rail 1.
[0038] In practical applications, it is not limited to support bars; it can also be multiple support protrusions arranged in a line, etc.
[0039] In the aforementioned curtain retractable track, the inner wall of the main track 1 is provided with a sound-absorbing part 15. Similarly, the upper wall of the sub-track 2 can also be provided with an attraction part. The attraction part can be a one-piece molded wavy surface, or it can be an additional layer of sound-absorbing cotton, etc.
[0040] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.
Claims
1. A curtain telescopic kit, comprising a main rail, a sub-rail disposed within the main rail, and rollers; both the main rail and the sub-rail have grooves at their lower parts; the lower part of the main rail consists of a pair of outer rails located on both sides of the groove; the lower part of the sub-rail consists of a pair of inner rails located on both sides of the groove and cooperating with the outer rails; the outer rails have first slide rails at their edges, and the inner rails have second slide rails at their edges; the rollers slide along the grooves on the first and second slide rails; the upper part of the sub-rail consists of a pair of first grooves that cooperate with mounting brackets on an external device; characterized in that: The upper two sides of the inner wall of the mother rail are provided with support members for supporting the first groove. When the upper wall of the first groove contacts the support member, there is a gap between the lower surface of the inner rail and the upper surface of the outer rail. The first slide rail has a bent recess on one side near the inner rail; the second slide rail has a positioning protrusion extending into the bent recess on one side. The shapes of the bending recess and the positioning protrusion are matched; when the bending recess and the positioning protrusion are tightly fitted, the upper surfaces of the first slide rail and the second slide rail are flush. The upper wall of the first groove is an inclined surface, and the distance from the position where the upper wall of the first groove contacts the support to the lower surface of the inner rail is less than the distance from the upper surface of the support to the upper surface of the outer rail.
2. The curtain telescopic kit according to claim 1, characterized in that: When the bent concave part and the positioning protrusion fit tightly together, there is a gap between the upper wall of the first groove and the support member.
3. The curtain telescopic kit according to claim 1 or 2, characterized in that: The support member is a support bar extending along the length of the main rail.
4. The curtain telescopic kit according to claim 1 or 2, characterized in that: The inner wall of the main rail is provided with a sound-absorbing part.
5. The curtain telescopic kit according to claim 1 or 2, characterized in that: The upper part of the main rail is provided with a second groove that mates with the mounting bracket of the external device.
6. The curtain telescopic kit according to claim 1 or 2, characterized in that: The aforementioned pulley includes a wheel body, a lifting ring, and a connecting plate disposed between the wheel body and the lifting ring; the wheel body is a pair and is slidably engaged with a first slide rail and a second slide rail respectively; the connecting plate passes through the groove.