A curtain track

Abstract

A curtain retractable track includes an outer track, an inner track, and a pulley assembly. The pulley assembly comprises a pair of pulleys arranged in a stepped wheel configuration, consisting of a small wheel that rolls on the outer track's small wheel rolling surface and a large wheel that rolls on the inner track's large wheel rolling surface. The step difference between the large and small wheels of this stepped wheel matches the step difference between the rolling surfaces of the large wheel on the inner track and the small wheel on the outer track. This ensures that whether the pulley assembly slides from the inner track to the outer track or vice versa, the large and small wheels of the pulleys share a common rotational force, thus avoiding noise during the transition between the inner and outer tracks. Therefore, this invention has a more rational structure, lower noise, and significantly improves the user's experience when drawing the curtains.

Description

Technical Field

[0001] This utility model relates to a track used in sliding curtains. Background Technology

[0002] With the rapid development of e-commerce, curtain retractable tracks have also seen explosive growth in online shopping in recent years due to their convenient packaging and transportation. When the inner and outer tracks of a curtain retractable track are used together, the pulleys generate significant noise when rolling along the track, as they move from the inner track to the outer track or vice versa, due to a height difference equivalent to the thickness of the inner track. Currently, the common practice is to install a plastic component at the fitting end of the inner track as a transition, with a beveled section on this component to bridge the height difference and reduce noise. However, in actual use, we have found that some noise still exists when the pulleys roll at both ends of the bevel (i.e., from a flat surface to a bevel or from a bevel to a flat surface). Especially since curtains use a large number of pulleys, the noise from each pulley rolling individually at both ends of the bevel is amplified, making the noise feel more pronounced and louder, thus affecting the user experience. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a curtain telescopic track with a more reasonable structure and less noise, which greatly improves the user's experience when drawing curtains.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution:

[0005] A curtain telescopic track includes an outer track, an inner track, and a pulley assembly, wherein:

[0006] The outer rail has an upward-facing upper vertical edge and an inward-facing inner folded edge on each side of the boom slot; the upper surface of the inner folded edge is the rolling surface of the small wheel; the end surface of the inner folded edge is the axial limiting surface of the roller assembly when it slides on the outer rail.

[0007] On both sides of the boom slot of the inner track, there are upward auxiliary limiting positions between the inner track and the outer track; the bottom surface between the inner side of the upper and lower auxiliary limiting positions between the inner track and the outer track and the inner vertical wall of the inner track is the rolling surface of the large wheel; the inner vertical wall is the axial limiting surface of the roller assembly when it slides on the inner track.

[0008] The pulley assembly includes a pair of pulleys, a boom located between the pair of pulleys and connected to them by a pulley axle, and a hook frame connected to the lower end of the boom and capable of rotating horizontally 360 degrees. The pulleys are stepped pulleys, each comprising a small wheel that rolls on the small wheel rolling surface of the outer track and a large wheel that rolls on the large wheel rolling surface of the inner track. When the pulley assembly slides only on the outer track, the small wheel of the pulley rolls on the small wheel rolling surface of the outer track, while the large wheel is suspended and unloaded. When the pulley assembly slides only on the inner track, the large wheel of the pulley rolls on the large wheel rolling surface of the inner track, while the small wheel is suspended and unloaded. When the pulley assembly slides on the overlapping portion of the inner and outer tracks, the large wheel of the pulley rolls on the large wheel rolling surface of the inner track, and the small wheel rolls on the small wheel rolling surface of the outer track; both the large and small wheels simultaneously bear loads.

[0009] The difference in the steps between the large wheel and the small wheel corresponds to the height difference between the rolling surfaces of the large wheel and the small wheel.

[0010] In the above-mentioned improved version of the curtain telescopic track, an outer circumferential inclined surface is provided on the outer side of the large wheel to guide the pulley assembly as it rolls from the outer track to the inner track; an inner circumferential inclined surface is provided on the inner side of the large wheel to guide the pulley assembly as it rolls from the inner track to the outer track.

[0011] In the above-mentioned improved scheme of curtain telescopic track, the inner track is provided with an upper and lower auxiliary limiting inclined surface between the inner track and the outer track on the inner side, the inner vertical wall and the large wheel rolling surface at the fitting end, an inner vertical wall inclined surface 221 and an inner bottom inclined surface, respectively.

[0012] In the above-mentioned improved version of the curtain telescopic track, the outer track has a guide slope for the small wheel to roll into the rolling surface of the small wheel at its fitting end.

[0013] In the above-mentioned improved version of the curtain telescopic track, the small wheel and the large wheel of the stepped pulley are either integral wheels or separate wheels.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: Because the pair of pulleys in the pulley assembly are configured as stepped wheels consisting of a small wheel that can roll on the rolling surface of the small wheel on the outer track and a large wheel that can roll on the rolling surface of the large wheel on the inner track, and the step difference between the large and small wheels of this stepped wheel matches the step difference between the rolling surfaces of the large wheel on the inner track and the small wheel on the outer track, when the pulley assembly slides from the inner track to the outer track: when the pulley is in the inner track section, the large wheel bears the force and the small wheel does not work; when the pulley is in the overlapping section of the inner and outer tracks, both the large and small wheels of the pulley bear the force simultaneously; when the pulley is in the outer track section, the small wheel continues to bear the force, and the large wheel does not... Then it works again; similarly, when the pulley assembly slides from the outer track to the inner track: when the pulley is on the outer track, the small wheel bears the force and the large wheel does not work; when the pulley is on the overlapping part of the outer and inner tracks, the small wheel and the large wheel of the pulley bear the force at the same time; when the pulley is on the inner track, the large wheel continues to bear the force and the small wheel no longer works. In this way, whether the pulley assembly slides from the inner track to the outer track or from the outer track to the inner track, the large wheel and the small wheel of the pulley have a process of joint relay, which can avoid noise generated when the pulley rolls between the inner and outer tracks. Therefore, the structure of this utility model is more reasonable, the noise is less, and the user's experience when drawing the curtains is greatly improved.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0017] Figure 2 This is a disassembly and assembly diagram of an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the pulley rolling on the outer track according to an embodiment of the present invention;

[0019] Figure 4 yes Figure 3 The front view;

[0020] Figure 5 This is a schematic diagram of the pulley rolling on the inner track according to an embodiment of the present invention;

[0021] Figure 6 yes Figure 5 The front view;

[0022] Figure 7 It is a cross-sectional schematic diagram of the pulley assembly rolling at the overlap of the inner and outer tracks;

[0023] Figure 8This is a schematic diagram of the end face of the outer track at the socket end according to an embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of the inner track at the end of the socket in an embodiment of the present invention. Detailed Implementation

[0025] A type of curtain retractable track, such as Figures 1 to 9 As shown, it includes an outer track 1, an inner track 2, and a pulley assembly 3, wherein:

[0026] On both sides of the boom slot of the outer track 1, there are an upward-facing upper vertical edge 11 and an inward-facing inner folded edge 12 located on the upper vertical edge 11; the upper surface of the inner folded edge 12 is the small wheel rolling surface 121; the end surface 122 of the inner folded edge 12 is the roller axial limiting surface when the roller assembly 3 slides on the outer track part.

[0027] On both sides of the boom slot of the inner rail 2, there are upward-facing upper and lower auxiliary limiting 21 between the inner rail and the outer rail; the bottom surface between the inner side of the upper and lower auxiliary limiting 21 between the inner rail and the outer rail and the inner vertical wall 22 of the inner rail 2 is the rolling surface 23 of the large wheel; the inner vertical wall 22 is the axial limiting surface of the roller assembly 3 when it slides in the inner rail section.

[0028] The pulley assembly 3 includes a pair of pulleys 31, a boom 33 located between the pair of pulleys 31 and connected to them by a pulley shaft 32, and a hook frame 34 connected to the lower end of the boom 33 and capable of rotating horizontally 360 degrees. The pulleys 31 are stepped pulleys, each including a small wheel 311 that rolls on the small wheel rolling surface 121 of the outer track 1 and a large wheel 312 that rolls on the large wheel rolling surface 23 of the inner track 2. When the pulley assembly 3 slides only on the outer track, the small wheel 311 of the pulley 31 rolls on the small wheel rolling surface 121 of the outer track 1, while the large wheel 312 is suspended and unloaded. Figure 4 As shown, at this time, the small wheel 311 bears the load, and the inner sides of the two large wheels of the pair of pulleys 31 are just limited by the roller axial limiting surface of the end surface 122 of the inner folded edge 12 of the outer track, so as to prevent the pulley assembly 3 from axially deviating when rolling on the outer track 1; when the pulley assembly 3 only slides on the inner track, the large wheel 312 of the pulley 31 rolls on the large wheel rolling surface 23 of the inner track 2, and the small wheel 311 is suspended and not under force, as... Figure 6As shown, at this time, the large wheel 312 plays a load-bearing role, and the large wheel 312 is laterally limited by the inner vertical walls 22 on both sides of the inner track 2. This can prevent the pulley assembly 3 from axially deviating when rolling on the inner track 2. When the pulley assembly 3 slides on the overlapping part of the inner and outer tracks, the large wheel 312 of the pulley 31 rolls on the large wheel rolling surface 23 of the inner track 2, and the small wheel 311 of the pulley 31 rolls on the small wheel rolling surface 121 of the outer track 1. Both the large and small wheels play a load-bearing role at the same time, so that the large wheel 312 or the small wheel 311 can smoothly take over and replace each other in this overlapping part of the track. Therefore, the pulley assembly 3 can smoothly transition from the inner track 2 to the outer track 1 or from the outer track 1 to the inner track 2, without any abnormal noise when sliding between the inner and outer tracks.

[0029] The difference in the steps between the large wheel 312 and the small wheel 311 matches the height difference between the rolling surface 23 of the large wheel and the rolling surface 121 of the small wheel. Therefore, the pulley assembly 3 can smoothly transition between the inner and outer tracks without any abnormal noise.

[0030] As can be seen from the above, because the pair of pulleys 31 of the pulley assembly 3 are configured as stepped wheels consisting of a small wheel 311 that can roll on the small wheel rolling surface 121 of the outer track 1 and a large wheel 312 that can roll on the large wheel rolling surface 23 of the inner track 2, and the step difference between the large wheel 312 and the small wheel 311 matches the height difference between the large wheel rolling surface 23 and the small wheel rolling surface 121, when the pulley assembly 3 slides from one end of the outer track 1 to one end of the inner track 2, the small wheel 311 and the large wheel 312 effectively transfer the load in the overlapping part of the outer track 1 and the inner track 2. That is, the small wheel 311, which is supported by rolling, can smoothly transition to the large wheel 312, which is supported by rolling. Similarly, when the pulley assembly 3 slides from one end of the inner track 2 to one end of the outer track 1, the large wheel 312 and the small wheel 311 effectively take over the load in the overlapping part of the inner track 2 and the outer track 1, so the large wheel 312, which is supported by rolling, can also smoothly transition to the small wheel 311, which is supported by rolling. This avoids noise generated when the pulley rolls between the inner and outer tracks. Therefore, the structure of this utility model is more reasonable, the noise is less, and the user's experience when drawing the curtains is greatly improved.

[0031] In this embodiment, as Figure 7 As shown, an outer circumferential inclined surface 3121 is provided on the outer side of the large wheel 312 to guide the pulley assembly 3 as it rolls from the outer track 1 to the inner track 2. This outer circumferential inclined surface 3121 can also reduce the impact of the large wheel on the inner vertical wall 22 of the inner track 2; as Figure 4 As shown, an inner circumferential inclined surface 3122 is provided on the inner side of the large wheel 312 to guide the pulley assembly 3 as it rolls from the inner track 2 to the outer track 1. It can also reduce the end surface 122 of the inner edge of the rolling surface of the small wheel on the outer track from hitting the large wheel.

[0032] Preferably, such as Figure 5 , 6 As shown in Figure 9, the inner track 2 has an upper and lower auxiliary limiting inclined surface 211 between the inner and outer tracks, an inner vertical wall inclined surface 221, and an inner bottom surface inclined surface 231 on the inner side of the upper and lower auxiliary limiting 21 between the inner and outer tracks, the inner vertical wall 22, and the large wheel rolling surface 23, respectively. These features help the large wheel 312 roll more smoothly and easily into the inner track 2. Figure 3 , 4 As shown in Figures 8 and 9, the outer track 1 has a small wheel rolling guide slope 1211 on the small wheel rolling surface 121 at its fitting end, which helps the small wheel 311 to roll into the outer track 1 more smoothly.

[0033] Preferably, in this embodiment, the small wheel 311 and the large wheel 312 of the stepped pulley 31 are an integral wheel. Of course, the small wheel 311 and the large wheel 312 can also be separate wheels.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation and positional relationship shown in the drawings or the installation and use method of the product as the reference orientation of the drawings. These are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the content of the claims of the present utility model shall fall within the technical scope of the present utility model.

Claims

1. A curtain telescopic track, comprising an outer track, an inner track, and a pulley assembly, characterized in that: The outer rail has an upward-facing upper vertical edge and an inward-facing inner folded edge on each side of the boom slot; the upper surface of the inner folded edge is the rolling surface of the small wheel; the end surface of the inner folded edge is the axial limiting surface of the roller assembly when it slides on the outer rail. On both sides of the boom slot of the inner track, there are upward auxiliary limiting positions between the inner track and the outer track; the bottom surface between the inner side of the upper and lower auxiliary limiting positions between the inner track and the outer track and the inner vertical wall of the inner track is the rolling surface of the large wheel; the inner vertical wall is the axial limiting surface of the roller assembly when it slides on the inner track. The pulley assembly includes a pair of pulleys, a boom located between the pair of pulleys and connected to them by a pulley axle, and a hook frame connected to the lower end of the boom and capable of rotating horizontally 360 degrees. The pulleys are stepped pulleys, each comprising a small wheel that rolls on the small wheel rolling surface of the outer track and a large wheel that rolls on the large wheel rolling surface of the inner track. When the pulley assembly slides only on the outer track, the small wheel of the pulley rolls on the small wheel rolling surface of the outer track, while the large wheel is suspended and unloaded. When the pulley assembly slides only on the inner track, the large wheel of the pulley rolls on the large wheel rolling surface of the inner track, while the small wheel is suspended and unloaded. When the pulley assembly slides on the overlapping portion of the inner and outer tracks, the large wheel of the pulley rolls on the large wheel rolling surface of the inner track, and the small wheel rolls on the small wheel rolling surface of the outer track; both the large and small wheels simultaneously bear loads. The difference in the steps between the large wheel and the small wheel corresponds to the height difference between the rolling surfaces of the large wheel and the small wheel.

2. A window treatment track according to claim 1, wherein: An outer circumferential inclined surface is provided on the outer side of the large wheel to guide the pulley assembly as it rolls from the outer track to the inner track; an inner circumferential inclined surface is provided on the inner side of the large wheel to guide the pulley assembly as it rolls from the inner track to the outer track.

3. A curtain telescopic track according to claim 1 or 2, characterized in that: The inner track is provided with an upper and lower auxiliary limiting inclined surface between the inner track and the outer track, an inner vertical wall inclined surface (221), and an inner bottom surface inclined surface on the inner side, inner vertical wall, and large wheel rolling surface of the inner track at its fitting end.

4. A curtain telescopic track according to claim 1 or 2, characterized in that: The outer track has a guide slope for the small wheel to roll into the rolling surface of the small wheel at its fitting end.

5. A curtain telescopic track according to claim 1 or 2, characterized in that: The stepped pulley's small and large wheels are either integral or separate.

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