Ball bearing device of retractable curtain

Abstract

Disclosed in the present utility model is a ball bearing device of a retractable curtain. The ball bearing device comprises a box, a transmission assembly and a curtain clip, wherein a cavity is formed inside the box, the transmission assembly is arranged in the cavity, and the curtain clip is rotationally connected to the box and is in transmission connection with the transmission assembly; two pairs of through holes in communication with the cavity are provided on opposite sides of the box, the transmission assembly comprises two transmission gears meshed with each other, and two ends of each transmission gear are rotationally arranged in the through holes; and the transmission gears drive the curtain clip to rotate. The ball bearing device of the present utility model is suitable for a retractable curtain, and a light adjusting rod can also extend out or draw back, thus two transmission gears are provided, and at least one transmission gear is meshed with an outer rod of the light adjusting rod, thereby avoiding the situation that the light adjusting rod cannot control the curtain clip.

Description

A ball-moving device for telescopic curtains Technical Field

[0001] The utility model relates to a ball-moving device for a telescopic curtain. Background Art

[0002] The ball-bearing mechanism in electric curtains is primarily used to suspend curtain blades or curtain fabric on a curtain track. The rotation of a dimming rod drives the curtain blade clamps on the ball-bearing mechanism, thereby adjusting the angle of sunlight entering. Traditional electric curtains are not retractable, requiring customization for specific sizes and requiring additional space for transportation. The applicant has developed a retractable curtain. Due to its retractable structure, existing ball-bearing mechanisms fail to transmit light to the dimming rod during use. Therefore, a ball-bearing mechanism compatible with retractable curtains is needed. Utility Model Content

[0003] The purpose of the utility model is to provide a ball-bearing device for a telescopic curtain to solve the technical problems mentioned in the above background technology.

[0004] The technical solution for achieving the purpose of the utility model is: a ball-moving device for a telescopic curtain includes a box, a transmission assembly and a curtain piece clamp; a cavity is formed inside the box, the transmission assembly is arranged in the cavity, the curtain piece clamp is rotatably connected to the box and is transmission-connected to the transmission assembly; two pairs of through holes communicating with the cavity are formed on opposite sides of the box, the transmission assembly includes two mutually meshing transmission gears, and the two ends of each transmission gear are rotatably arranged in the through hole; the transmission gear drives the curtain piece clamp to rotate.

[0005] Furthermore, the transmission gear includes a rotating shaft with a hollow interior and a gear ring sleeved on the outer circumference of the rotating shaft and integrally formed with the rotating shaft; both ends of the rotating shaft are rotatably arranged in the through hole.

[0006] Furthermore, the cross section of the inner side wall of the rotating shaft is polygonal.

[0007] Furthermore, the transmission assembly also includes a worm wheel and a worm; there are two worm wheels, which are respectively fixed on the rotating shafts of the two transmission gears. The two worm wheels are located on both sides of the worm wheel and are both matched with the worm wheel; the worm wheel is fixedly connected to the curtain plate clamp.

[0008] Furthermore, the inner side wall of the worm is evenly provided with a plurality of positioning ribs along the axial direction, and the outer peripheral surface of the rotating shaft is provided with at least one positioning rib, and two adjacent positioning ribs cooperate with the positioning ribs; when the worm is fixed to the transmission gear, the positioning rib is inserted between the two adjacent positioning ribs.

[0009] Furthermore, a cover plate for sealing the cavity is provided at the upper end of the box body, and the cover plate is detachably connected to the box body by a buckle.

[0010] Furthermore, the worm wheel is a hollow annular structure with a positioning block provided on the inner wall, and the lower surface of the cover plate is provided with an arc-shaped rotation limit block that fits the inner wall of the worm wheel; the positioning block and the rotation limit block cooperate to ensure that there are two extreme positions when the worm wheel rotates.

[0011] Furthermore, a fixing hole and a stopper are provided at the lower end of the box body, a gap is formed between the stopper and the box body, a ball running distance piece is passed through the gap, and the ball running distance piece is movably connected to the gap.

[0012] Furthermore, one end of the running ball distance piece is provided with a fixing rod that cooperates with the fixing hole, and the other end is provided with a limit block that cooperates with the stop block; when the telescopic curtain is in the open state, the limit block of the running ball distance piece abuts against the stop block of the box body of the adjacent running ball device.

[0013] Furthermore, box rollers are fixed on both sides of the box in the length direction, and the box rollers are arranged in two layers, and the radii of the two layers are inconsistent.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] (1) Since the ball-bearing device of the present invention is suitable for telescopic curtains and the dimming rod can also be telescopic, two transmission gears are provided so that at least one transmission gear is engaged with the outer rod of the dimming rod, and the situation where the dimming rod cannot control the curtain clamp will not occur.

[0016] (2) Since the present invention has two transmission gears, one of which may not be able to cooperate with the dimming rod, two worm gears are also provided. The worm gear and the worm gear are used to change the transmission direction and better control the rotation of the curtain clamp.

[0017] (3) The cross section of the inner side wall of the rotating shaft of the utility model is set to be polygonal, which makes the transmission smoother and also prevents the wear of the dimming rod.

[0018] (4) The present invention utilizes the cooperation of the positioning rib and the positioning strip to make the worm and the transmission gear rotate synchronously, thereby preventing the situation where the transmission gear cannot drive the worm to rotate.

[0019] (5) The cover plate of the present invention is provided with a rotation limit block, so that the curtain clamp has two extreme positions when rotating. Through debugging during installation, the extreme position of the curtain clamp rotation is fixed each time the telescopic curtain is opened and closed, thereby improving the comfort of use.

[0020] (6) The lower end of the box body of the utility model is provided with a structure that cooperates with the ball distance plate, so that when the telescopic curtain is in the open state, the maximum distance between each two ball devices is limited by the ball distance plate, preventing the existence of gaps between the curtain pieces due to the excessive distance between the ball devices, which affects the use.

[0021] (7) The box body of the present invention is provided with box rollers, which make it easier for the ball running device to slide in the track of the telescopic curtain. The box rollers are provided with double layers with inconsistent radii, which makes it easier for the ball running device to switch between the inner and outer tracks during the operation of the telescopic curtain track without any bumps or jams. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the present invention easier to understand, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0023] FIG1 is a schematic structural diagram of the present utility model.

[0024] FIG2 is a schematic structural diagram of the present invention from another direction.

[0025] FIG3 is a schematic structural diagram of the transmission assembly of the present invention.

[0026] FIG4 is a schematic structural diagram of the cover plate of the present invention.

[0027] FIG5 is a schematic structural diagram of the transmission gear and worm gear of the present invention.

[0028] FIG6 is a schematic structural diagram of the ball-running distance piece of the present invention.

[0029] FIG7 is a schematic structural diagram of the running ball device of the present invention after being pulled apart and cooperating with the running ball distance piece.

[0030] The numbers in the accompanying drawings are: box body 1, through hole 1-1, fixing hole 1-2, stopper 1-3, box roller 1-4, transmission assembly 2, transmission gear 2-1, positioning rib 2-1-1, curtain plate clamp 3, worm gear 4, positioning block 4-1, worm 5, positioning rib 5-1, cover plate 6, rotation limit block 6-1, notch 7, ball distance piece 8, fixing rod 8-1, limit block 8-2. DETAILED DESCRIPTION

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0037] (Example 1)

[0038] As shown in Figures 1-7, a ball-moving mechanism for a retractable curtain includes a housing 1, a transmission assembly 2, and a curtain slat clamp 3. The housing 1 is rectangular in shape, with a cavity formed within it. The transmission assembly 2 is disposed within the cavity. The curtain slat clamp 3 extends through the bottom surface of the housing 1 and is rotationally connected to the housing 1. It is also in transmission connection with the transmission assembly 2.

[0039] Box rollers 1-4 are fixed to both sides of the length of the box 1 to facilitate the sliding of the ball bearing mechanism within the track. Because the ball bearing mechanism is used for retractable curtains, the track has a height difference at the transition point between the inner and outer rails. Conventional box rollers 1-4 would bump or get stuck when passing through. Therefore, the box rollers 1-4 are configured as two layers with different radii. One layer mates with the outer rail of the track, and the other mates with the inner rail of the track, allowing for smooth passage at the transition point between the inner and outer rails.

[0040] The transmission assembly 2 includes two transmission gears 2-1, a worm wheel 4, and two worms 5. The housing 1 is provided with two pairs of through-holes 1-1 on both sides in the thickness direction, communicating with the cavity. The two ends of each transmission gear 2-1 are rotatably disposed within the through-holes 1-1. The transmission gear 2-1 includes an internally hollow rotating shaft and a ring gear sleeved on the outer circumference of the rotating shaft and integrally formed with the rotating shaft. The two ends of the rotating shaft are rotatably disposed within the through-holes 1-1, and the ring gears of the two transmission gears 2-1 mesh with each other. The two worms 5 are respectively fixed to the rotating shafts of the transmission gears 2-1. The inner sidewalls of the worms 5 are uniformly provided with a plurality of positioning ribs 5-1 along the axial direction. At least one positioning rib 2-1-1 is provided on the outer circumference of the rotating shaft, and two adjacent positioning ribs 5-1 cooperate with the positioning rib 2-1-1. When the worm 5 is fixed to the transmission gear 2-1, the positioning rib 2-1-1 is inserted between two adjacent positioning ribs 5-1. When the transmission gear 2-1 rotates, it drives the worm 5 to rotate together. The worm wheel 4 is located between the two worms 5 and cooperates with the worms 5. The lower portion of the worm wheel 4 is fixedly connected to the upper portion of the curtain slat clamp 3. The middle portion of the curtain slat clamp 3 is rotatably connected to the bottom of the housing 1, and the lower portion is equipped with a clamp for clamping the curtain slats. The rotation axis of the worm 5 is perpendicular to the rotation axis of the worm wheel 4. Therefore, when the transmission gear 2-1 rotates, it can drive the worm wheel 4 to rotate, and thus the clamp on the curtain slat clamp 3 to rotate.

[0041] The ball-bearing mechanism of this embodiment is suitable for use with a retractable curtain. The curtain's dimming rod passes through and engages with the rotating shaft of transmission gear 2-1. To ensure optimal fit between the dimming rod and the rotating shaft, the inner sidewall of the rotating shaft is designed with a polygonal cross-section. In this embodiment, the inner sidewall of the rotating shaft is designed with a hexagonal cross-section.

[0042] A cover plate 6 for sealing the cavity is provided at the upper end of the box body 1 , and the cover plate 6 is connected to the box body 1 by snap fasteners.

[0043] As shown in Figures 3 and 4 , the worm gear 4 is configured as a hollow annular structure with a positioning block 4-1 on its inner sidewall. A curved rotation stop 6-1 is provided on the lower surface of the cover plate 6, conforming to the inner sidewall of the worm gear 4. The rotation stop 6-1 extends into the upper portion of the worm gear 4. When the worm gear 4 rotates, regardless of the direction, the positioning block 4-1 is engaged by the rotation stop 6-1 after a certain distance, resulting in two extreme rotational positions for the worm gear 4 and, consequently, for the curtain slat clamp 3.

[0044] As shown in Figures 2, 6, and 7, the lower end of the housing 1 is provided with a fixing hole 1-2 and a stopper 1-3. A gap 7 is formed between the stopper 1-3 and the housing 1, and a ball-type distance piece 8 is inserted through the gap 7. A fixing rod 8-1 is provided at one end of the ball-type distance piece 8, which engages with the fixing hole 1-2 to secure one end of the ball-type distance piece 8 to the ball-type device. A limit block 8-2 is provided at the other end of the ball-type distance piece 8, which engages with the stopper 1-3 on another adjacent ball-type device. When the retractable curtain is extended to its maximum extent, the limit block 8-2 of the ball-type distance piece 8 abuts the stopper 1-3.

[0045] In order to prevent the running ball distance pieces 8 from affecting each other when the telescopic curtain is folded, fixing holes 1-2 and blocks 1-3 are provided on both sides of the lower end of the box body 1, and the running ball distance pieces 8 are staggered.

[0046] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ball-moving device for a telescopic curtain, characterized in that: The invention comprises a housing (1), a transmission assembly (2) and a curtain piece clamp (3); a cavity is formed inside the housing (1), the transmission assembly (2) is arranged in the cavity, the curtain piece clamp (3) is rotatably connected to the housing (1), and is transmission-connected to the transmission assembly (2); two pairs of through holes (1-1) communicating with the cavity are provided on opposite sides of the housing (1), the transmission assembly (2) comprises two mutually meshing transmission gears (2-1), and both ends of each transmission gear (2-1) are rotatably arranged in the through hole (1-1); the transmission gear (2-1) drives the curtain piece clamp (3) to rotate.

2. The ball-moving device for a telescopic curtain according to claim 1, characterized in that: The transmission gear (2-1) comprises a rotating shaft with a hollow interior and a gear ring sleeved on the outer circumference of the rotating shaft and integrally formed with the rotating shaft; both ends of the rotating shaft are rotatably arranged in the through hole (1-1).

3. The ball-moving device for a telescopic curtain according to claim 2, characterized in that: The inner side wall of the rotating shaft has a polygonal cross section.

4. The ball-moving device for a telescopic curtain according to claim 2, characterized in that: The transmission assembly (2) further comprises a worm wheel (4) and a worm (5); there are two worm wheels (5), which are respectively fixed on the rotating shafts of the two transmission gears (2-1); the two worm wheels (5) are located on both sides of the worm wheel (4) and both cooperate with the worm wheel (4); the worm wheel (4) is fixedly connected to the curtain plate clamp (3).

5. The ball-moving device for a telescopic curtain according to claim 4, characterized in that: The inner side wall of the worm (5) is evenly provided with a plurality of positioning convex ribs (5-1) along the axial direction, and the outer peripheral surface of the rotating shaft is provided with at least one positioning convex strip (2-1-1), and two adjacent positioning convex ribs (5-1) are matched with the positioning convex strip (2-1-1); when the worm (5) is fixed to the transmission gear (2-1), the positioning convex strip (2-1-1) is inserted between two adjacent positioning convex ribs (5-1).

6. The ball-moving device for a telescopic curtain according to claim 4, characterized in that: A cover plate (6) for closing the cavity is provided at the upper end of the box body (1); the cover plate (6) is detachably connected to the box body (1) via a buckle.

7. The ball-moving device for a telescopic curtain according to claim 6, characterized in that: The worm wheel (4) is a hollow annular structure, with a positioning block (4-1) provided on the inner side wall, and an arc-shaped rotation limit block (6-1) which fits the inner side wall of the worm wheel (4) is provided on the lower surface of the cover plate (6); the positioning block (4-1) cooperates with the rotation limit block (6-1) so that the worm wheel (4) has two extreme positions when rotating.

8. The ball-moving device for a telescopic curtain according to claim 1, characterized in that: The lower end of the box body (1) is provided with a fixing hole (1-2) and a stopper (1-3); a notch (7) is formed between the stopper (1-3) and the box body (1); a ball-moving distance piece (8) is passed through the notch (7); and the ball-moving distance piece (8) is movably connected to the notch (7).

9. The ball-moving device for a telescopic curtain according to claim 8, characterized in that: One end of the ball-type distance piece (8) is provided with a fixing rod (8-1) matched with the fixing hole (1-2), and the other end is provided with a limiting block (8-2) matched with the stop block (1-3); when the telescopic curtain is in an open state, the limiting block (8-2) of the ball-type distance piece (8) abuts against the stop block (1-3).

10. The ball-moving device for a telescopic curtain according to claim 1, characterized in that: Box rollers (1-4) are fixed on both sides of the box (1) in the length direction. The box rollers (1-4) are arranged in two layers, and the radii of the two layers are inconsistent.

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