Roller cord thread wheel for sunshade curtain

Abstract

The utility model relates to the technical field of sunshade curtains, and discloses a roller shutter thread wheel for a sunshade curtain, the roller shutter thread wheel comprises a conical winding part and a connecting part, the connecting part is arranged at the small-diameter end of the conical winding part, and the connecting part is correspondingly connected with the two ends of a rolling shaft. The outer wall face of the periphery of the conical winding part is provided with a wire guide groove for guiding a pull rope to be wound, the side face of the large-diameter end of the conical winding part is provided with a fastening clamping groove for fixing the pull rope, and the wire guide groove is in a spiral shape in the axial direction from the large-diameter end to the small-diameter end of the outer wall face of the conical winding part. The integral arrangement realizes the synchronization of the roller cord thread wheel and the rolling shaft, so that the noise generated when the buffer mechanism of the sunshade curtain works is avoided; meanwhile, the load of the mechanism is reduced, the failure problem of the buffer mechanism is avoided, in addition, the spiral wire guide groove is beneficial to winding of the pull rope and guiding winding and unwinding from the large-diameter end to the small-diameter end, stress concentration is integrally reduced, the abrasion degree is reduced, and the service life of the sunshade curtain is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sunshade curtains, in particular to a rolling wheel for sunshade curtains. Background Art

[0002] Most of the existing sunshades used in cars can be unfolded or folded by electric control or manual means, which is convenient for use at any time. However, the rollers in the commonly used sunshades will slip or get tangled during use, resulting in stress concentration and energy consumption.

[0003] After searching, it is found that a direct-drive sunroof sunshade structure is disclosed in Chinese patent CN219055937U, including a sunshade frame, a curtain, a rolling shaft, a pull rod, and a transmission mechanism, wherein one end of the curtain is connected to the rolling shaft, and the other end of the curtain is connected to the pull rod, and both ends of the rolling shaft are rotatably arranged at the rear end of the sunshade frame; the transmission mechanism includes a motor and two transmission cables, the motor is arranged at one end of the rolling shaft, the gear of the motor is meshed and connected with the gear arranged at the end of the rolling shaft, and cable coils are respectively arranged at both ends of the rolling shaft, one end of the two transmission cables is respectively connected to the two cable coils, and the other end of the transmission cables is respectively connected to the two cable coils. One end extends along the length direction of the sunshade guide rails on both sides of the sunshade frame to the front end of the sunshade frame, and a guide wheel is arranged at the front end of the sunshade frame. The other end of the transmission cable passes around the guide wheel and is connected to the pull rod, so that when the curtain is fully rolled up, the transmission cable is unfolded on the cable coil, or when the curtain is fully unfolded, the transmission cable is rolled up on the cable coil, and a spiral guide groove is arranged on the outer wall of the tube body of the cable coil, and a guide auxiliary wheel that can move left and right along the axis is arranged between the rolling curtain shaft and the rear end of the sunshade guide rail, and the guide auxiliary wheel and the central axis of the rolling curtain shaft are parallel to each other, and the outer wall of the tube body of the cable coil is a cone.

[0004] Although the cable coil of the sunshade structure disclosed in the above patent also adopts a cone combined with a spiral guide groove, its structure is that the large diameter end of the cone faces inward and is connected to the two ends of the rolling curtain shaft, and the small diameter end of the cone faces outward. When the window is actually closed and started, the cable coil sleeved on the rolling curtain shaft also rotates together. At this time, the diameter of the curtain on the rolling curtain shaft is the largest, and the winding diameter of the transmission cable on the cable coil is the smallest. During the window closing process, the curtain unfolded by the rolling curtain shaft is longer than the transmission cable retracted by the cable coil. In order to make the length of the unfolded curtain the same as the length of the transmission cable, the cable coil needs to rotate more circles than the rolling curtain shaft, that is, the rotation speed of the cable coil is faster than the rotation speed of the rolling curtain shaft, that is, the feedback force required by the buffer mechanism installed between the rolling curtain shaft and the cable coil will be reduced. When the diameter of the curtain on the reel is the same as the winding diameter of the cable on the pulley, the feedback force required by the buffer mechanism is minimized, and then when the window is about to be fully closed, the rotation speed of the cable coil is slower than the rotation speed of the curtain shaft, and the feedback force required by the buffer mechanism gradually increases, and the corresponding window opening process is the opposite. As a result, the mechanism load is large during the window opening and closing process, and the buffer mechanism is prone to failure at the same time, resulting in the transmission cable being too tight or loose, causing the transmission cable to be excessively worn or loose, thereby affecting the normal opening and closing smoothness of the sunshade. Utility Model Content

[0005] The utility model aims to provide a rolling wheel for sunshade curtains, by arranging the connecting part of the rolling wheel at the small diameter end of the conical winding part, and providing a fastening groove for fixing the pull rope on the side of the large diameter end of the conical winding part of the rolling wheel, the speed of rolling up the curtain cloth and the speed of pulling up the pull rope during the window opening and closing process can be reduced or increased at the same time, the rotation amount between the rolling wheel and the winding shaft is very small, or even no rotation, thereby avoiding the noise generated when the buffer mechanism is working; at the same time, the mechanism load is also reduced, avoiding the failure problem of the buffer mechanism, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rolling wheel for a sunshade curtain, the sunshade curtain comprises a frame, the surface of the frame is installed with two parallel guide rails, both ends of the two guide rails are rotatably installed with a winding shaft, the winding shaft is provided with a retractable rolling curtain cloth, two push-pull rods for pulling the rolling curtain cloth to unfold are slidably installed on the guide rail, the middle part of the guide rail is correspondingly rotatably installed with a first guide wheel, the two ends of the winding shaft are fixed with a rolling wheel, the side of the rolling wheel is fixed with a pull rope, the other end of the pull rope is connected to the push-pull rod after passing through the first guide wheel, the rolling wheel comprises a conical winding part and a connecting part, the connecting part is arranged at the small diameter end of the conical winding part, the connecting part is correspondingly connected with the two ends of the winding shaft, the peripheral outer wall surface of the conical winding part is provided with a wire groove for guiding the winding of the pull rope, and the side surface of the large diameter end of the conical winding part is provided with a fastening groove for fixing the pull rope.

[0007] Preferably, the wire groove is axially spirally shaped from the large diameter end to the small diameter end along the outer wall of the conical winding portion.

[0008] Preferably, a guide opening is correspondingly provided at the periphery of the large diameter end of the conical winding portion, and the guide opening corresponds to the connecting fastening slot and the wire slot.

[0009] Preferably, a stop protrusion is provided between the small diameter end of the conical winding portion and the connecting portion.

[0010] Preferably, the cord wheel is provided with a through hole along the axial direction.

[0011] Preferably, a plurality of reinforcing ribs are provided between the large diameter end surface of the conical winding portion and the through hole.

[0012] Preferably, the connecting portion is provided with a plurality of positioning steps in the axial direction.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model arranges the connecting part of the curtain wheel at the small diameter end of the conical winding part, and the peripheral outer wall surface of the conical winding part is provided with a wire groove for guiding the winding of the pull rope, and the side surface of the large diameter end of the conical winding part is provided with a fastening groove for fixing the pull rope, so that the speed of the curtain cloth unfolding and the speed of the pull rope retracting in the window closing process are reduced correspondingly at the same time, and the relative rotation amount between the curtain wheel and the winding shaft is very small, or even no rotation is achieved, that is, the curtain wheel and the winding shaft are synchronized, and the noise generated when the buffer mechanism of the sunshade is working is avoided; at the same time, the load of the mechanism is also reduced, and the failure problem of the buffer mechanism is avoided. In addition, the spiral-shaped wire groove is conducive to the winding of the pull rope and the guiding of the retraction and release from the large diameter end to the small diameter end, which reduces the stress concentration as a whole, reduces the degree of wear, and prolongs the service life of the sunshade. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model when the sunshade curtain is in an open state;

[0016] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0018] Figure 4 It is a structural schematic diagram of the utility model when the sunshade curtain is in a closed state;

[0019] Figure 5 Based Figure 4 Enlarged view of point C in the middle;

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the curtain wire wheel of the utility model;

[0021] Figure 7 It is a left side view of the cord roller of the utility model;

[0022] Figure 8 It is a front cross-sectional view of the cord roller of the utility model.

[0023] In the figure: 1. frame; 2. guide rail; 21. first guide wheel; 22. pull rope; 3. reel; 31. cord wheel; 311. conical winding part; 311a. wire guide groove; 311b. guide opening; 312. fastening slot; 313. through hole; 314. stop protrusion; 315a. positioning step; 316. reinforcing rib; 4. cord cloth; 5. push-pull rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4The utility model provides a technical solution: a rolling cord wheel for a sunshade, the sunshade comprises a frame 1, two parallel guide rails 2 are installed on the surface of the frame 1, both ends of the two guide rails 2 are rotatably installed with a reeling shaft 3, a reeling curtain cloth 4 is sleeved on the reeling shaft 3, two push-pull rods 5 for pulling the reeling curtain cloth to unfold are slidably installed on the guide rail 2, a first guide wheel 21 is rotatably installed in the middle of the guide rail 2, a rolling cord wheel 31 is fixed on both ends of the reeling shaft 3, a pull rope 22 is fixed on the side of the rolling cord wheel 31, and the other end of the pull rope 22 is connected to the push-pull rod 5 after passing around the first guide wheel 21,

[0026] like Figures 5 to 8 As shown, the cord wheel 31 includes a conical winding portion 311 and a connecting portion 315, wherein the connecting portion 315 is arranged at the small diameter end of the conical winding portion 311, and the connecting portion 315 is correspondingly connected to the two ends of the winding shaft 3, and the peripheral outer wall surface of the conical winding portion 311 is provided with a wire groove 311a for guiding the winding of the pull rope 22, and the side surface of the large diameter end of the conical winding portion 311 is provided with a fastening groove 312 for fixing the pull rope 22.

[0027] In order to ensure that the pull rope 22 is gathered in an orderly manner from the large diameter end to the small diameter end and does not pile up on each other, the wire groove 311a is axially spirally shaped from the large diameter end to the small diameter end along the outer wall of the conical winding part 311.

[0028] A guide opening 311b is correspondingly provided around the large diameter end of the conical winding portion 311, and the guide opening 311b is correspondingly connected to the fastening slot 312 and the wire groove 311a. The main thing is that after one end of the pull rope 22 is fixed in the fastening slot 312, the pull rope 22 is clamped through the guide opening 311b and passes through the wire groove 311a at the large diameter end of the conical winding portion 311, and then passes around the first guide wheel 21 and the other end is connected to the push-pull rod 5.

[0029] In addition, a stop protrusion 314 is provided between the small diameter end of the conical winding portion 311 and the connecting portion 315, so as to realize an axial stop effect on the pull rope 22 after winding and accumulation.

[0030] The cord wheel is provided with a through hole 313 along the axial direction, which is mainly used to insert the positioning shaft between the winding shaft 3 and the guide rail 2 to facilitate the assembly of the integrated structure.

[0031] In order to ensure the structural strength of the cord wheel 31 during operation, a plurality of reinforcing ribs 316 are provided between the large diameter end surface of the conical winding portion 311 and the through hole 313 to improve the operating reliability.

[0032] A plurality of positioning steps 315a are provided in the axial direction of the connecting portion 315, which can assist in being inserted into the winding shaft 3. If the buffer structure of the sunshade curtain adopts a torsion spring pre-tightening structure, the positioning steps 315a can be connected to the winding shaft 3 and can also be clamped with the torsion spring pre-tightening structure.

[0033] Working principle: During window closing, when the roller blind 4 is unfolded, the winding diameter of the corresponding pull rope 22 on the roller blind wheel 31 is the same, that is, the unfolding speed of the roller blind 4 and the retracting speed of the pull rope 22 are reduced at the same time, and during window opening, the retracting speed of the roller blind 4 and the releasing speed of the pull rope 22 are increased at the same time. The relative rotation between the roller blind wheel 31 and the winding shaft 3 is very small, or even does not rotate, that is, the synchronization of the roller blind wheel 31 and the winding shaft 3 is achieved, thereby avoiding the noise generated when the buffer mechanism of the sunshade is working; at the same time, the mechanism load is also reduced, thereby avoiding the failure problem of the buffer mechanism.

[0034] In addition, the spiral-shaped wire groove 311a is conducive to the winding of the pull cord 22 and the guiding of the pull cord 22 from the large diameter end to the small diameter end. The overall structure reduces stress concentration, reduces the degree of wear, and extends the service life of the sunshade.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller for sunshade curtain, the sunshade curtain comprising a frame, two parallel guide rails are installed on the surface of the frame, both ends of the two guide rails are rotatably installed with a winding shaft, a retractable rolling curtain cloth is sleeved on the winding shaft, two push-pull rods for pulling the rolling curtain cloth to unfold are slidably installed on the guide rail, a first guide wheel is rotatably installed in the middle of the guide rail, a roller is fixed at both ends of the winding shaft, a pull rope is fixed on the side of the roller, and the other end of the pull rope is connected to the push-pull rod after passing the first guide wheel, characterized in that: The cord wheel includes a conical winding portion and a connecting portion, wherein the connecting portion is arranged at the small diameter end of the conical winding portion, and the connecting portion is correspondingly connected to the two ends of the winding shaft. The peripheral outer wall surface of the conical winding portion is provided with a wire groove for guiding the winding of the pull rope, and the side surface of the large diameter end of the conical winding portion is provided with a fastening groove for fixing the pull rope.

2. The rolling wheel for sunshade curtain according to claim 1, characterized in that: The wire groove is axially spirally shaped from the large diameter end to the small diameter end along the outer wall of the conical winding portion.

3. The rolling wheel for sunshade curtain according to claim 1, characterized in that: A guide opening is correspondingly arranged at the periphery of the large diameter end of the conical winding portion, and the guide opening is correspondingly connected to the fastening slot and the wire slot.

4. The rolling wheel for sunshade curtain according to claim 1, characterized in that: A stop protrusion is provided between the small diameter end of the conical winding part and the connecting part.

5. The rolling wheel for sunshade curtain according to claim 1, characterized in that: The cord wheel is provided with a through hole along the axial direction.

6. The cord roller for sunshade curtain according to claim 5, characterized in that: A plurality of reinforcing ribs are arranged between the large diameter end surface of the conical winding portion and the through hole.

7. The rolling wheel for sunshade curtain according to claim 1, characterized in that: A plurality of positioning steps are arranged in the axial direction of the connecting portion.

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