Pull-rope-free system of curtain

Abstract

According to the technical scheme, the rope-free system of the curtain is characterized by comprising a curtain box, a curtain body and a rope winding system, the rope winding system is contained in the curtain box, a pulling rope of the rope winding system extends out of the curtain box and is connected with the curtain body, and the rope winding system comprises a rope winder, a spring assembly and a transmission rod. The transmission rod penetrates through the rope winder and the spring assembly to drive the rope winder and the spring assembly to synchronously drive; the spring assembly comprises a vertical spring block assembly and a transverse spring assembly, and the vertical spring block assembly and the transverse spring assembly are used for keeping hovering when the curtain body is pulled up and down. The transmission rod is controlled through the spring assembly, then the transmission rod controls the rope winder to control the pull rope, direct control over the pull rope is avoided, and stress balance is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of curtain system technology, and more specifically to a cordless curtain system. Background Technology

[0002] Currently, curtains can generally be divided into two types based on their structure: corded and cordless. Corded curtains use a cord to control the height of the curtain, allowing it to be opened and closed. Cordless curtains, on the other hand, use the user's hand to push or pull the lower beam to open or close the curtain.

[0003] For example, Chinese patent CN215859915U discloses a curtain transmission mechanism for a cordless curtain, which controls the cord through a pull rope wheel in conjunction with a coil spring and a coil spring wheel. However, it was found in use that the pull rope wheel directly controls the cord, which easily leads to over-pulling of the cord and causing left-right imbalance. Therefore, the transmission part of the curtain needs to be improved. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cordless curtain system. A spring assembly controls a transmission rod, which in turn controls a rope winder to control the pull cord, thus avoiding direct control of the pull cord and ensuring force balance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cordless curtain system, comprising a curtain box, a curtain body, and a cord winding system, wherein the cord winding system is housed within the curtain box, and the traction cord of the cord winding system extends out of the curtain box and connects to the curtain body. The cord winding system comprises a cord winder, a spring assembly, and a transmission rod, the transmission rod passing through the cord winder and the spring assembly to drive them synchronously; the spring assembly comprises a vertical spring block assembly and a horizontal spring assembly, the vertical and horizontal spring assemblies being used to keep the curtain suspended when it is pulled up and down.

[0006] The present invention is further configured such that: the vertical spring assembly includes a first coil rod, a second coil rod, and a coil spring arranged adjacent to each other; the first coil rod rotates synchronously with the transmission rod; one end of the coil spring is fixedly disposed on the first coil rod, and the other end is fixedly disposed on the second coil rod and wound around the second coil rod.

[0007] The present invention is further configured such that: a main gear is provided inside the vertical spring assembly, and a secondary gear that meshes with the main gear is provided at the end of the first coil rod, and the main gear is circumferentially fixedly connected to the transmission rod.

[0008] The present invention is further configured such that the main gear is located at the middle position between the first winding rod and the second winding rod.

[0009] The present invention is further configured such that: the horizontal spring assembly includes a base and a rotating shaft that rotates with the base; the rotating shaft is circumferentially fixedly connected to the transmission rod; one end of the rotating shaft is provided with a nut that is threadedly engaged with it; the other end is provided with a plane bearing that is axially fixed; the nut slides axially within the base; and a spring abuts between the nut and the plane bearing.

[0010] The present invention is further configured such that: the horizontal spring assembly includes a base and a rotating shaft that rotates with the base; the rotating shaft is circumferentially fixedly connected to the transmission rod; one end of the base is provided with an adjustment box and the other end is provided with a plane bearing; one end of the rotating shaft is provided with a damping end face that abuts against the plane bearing; the other end passes through the adjustment box; a friction plate is provided on the damping end face; and a spring is sleeved on the rotating shaft, with both ends of the spring abutting against the adjustment box and the friction plate, respectively.

[0011] The present invention is further configured such that: the side wall of the base is provided with a plurality of limiting grooves distributed along the axial direction, and the adjusting box is provided with a limiting member that engages with the limiting groove, thereby realizing the axial movement adjustment of the adjusting box through the limiting member and the limiting groove.

[0012] The present invention is further configured such that: the adjustment box is provided with an adjustment button, the limiting member includes a pair of limiting plates and a telescopic spring located between the pair of limiting plates, the adjustment button extends with a beveled part, and each of the pair of limiting plates is provided with a beveled block that cooperates with the beveled part, the beveled part having an inverted V-shaped structure.

[0013] The present invention is further configured such that: the rope winder is provided in two sets, and the horizontal spring assembly is disposed between the two sets of rope winders.

[0014] The present invention is further configured such that: the curtain body includes a lower beam fixedly disposed at the bottom, and the traction rope is fixedly connected to the lower beam.

[0015] The present invention is further configured such that the curtain body includes, but is not limited to, Venetian blinds and honeycomb blinds.

[0016] In summary, this utility model has the following beneficial effects:

[0017] Compared with the prior art, this utility model controls the transmission rod through a vertical spring block assembly and a horizontal spring assembly, and then controls the rope winder and the pull rope through the transmission rod. In this way, the pull rope is indirectly controlled through the transmission rod and the rope winder, so that the force of the spring assembly is first stabilized through the transmission rod and the rope winder, and then acts on the pull rope more stably, without over-pulling the rope and maintaining the left and right balance of the pull rope.

[0018] Meanwhile, this invention achieves greater stability and better performance by balancing the forces of the vertical spring block assembly and the horizontal spring assembly. Furthermore, the horizontal spring assembly allows for adjustment of rotational resistance, making it convenient to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure.

[0020] Figure 2 This is a schematic diagram of the vertical spring block assembly.

[0021] Figure 3 This is a schematic diagram of the main and auxiliary gear structure of the vertical spring block assembly.

[0022] Figure 4 This is a schematic diagram of a horizontal spring assembly.

[0023] Figure 5 This is a schematic diagram of the exploded structure of a horizontal spring assembly.

[0024] Figure 6 This is a schematic diagram of the internal structure of the adjustment box.

[0025] Reference numerals: 1. Curtain box; 2. Curtain body; 21. Lower beam; 3. Guiding rope; 4. Rope winder; 5. Spring assembly; 51. Vertical spring block assembly; 511. First roller rod; 512. Second roller rod; 513. Coil spring; 52. Horizontal spring assembly; 521. Base; 522. Rotating shaft; 5221. Damping end face; 5222. Friction plate; 523. Adjustment box; 524. Surface bearing; 525. Spring; 6. Transmission rod; 7. Main gear; 8. Secondary gear; 9. Limiting groove; 91. Limiting element; 911. Limiting piece; 9111. Inclined block; 912. Telescopic spring; 10. Adjustment button; 1001. Inclined part. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] This embodiment discloses a cordless curtain system, such as... Figure 1-4As shown, the curtain includes a curtain box 1, a curtain body 2, and a cord system. The cord system is housed within the curtain box 1. The traction cord 3 of the cord system extends from the curtain box 1 and connects to the curtain body 2. The cord system includes a cord winder 4, a spring assembly 5, and a transmission rod 6. The transmission rod 6 passes through the cord winder 4 and the spring assembly 5 to drive them synchronously. The spring assembly 5 includes a vertical spring block assembly 51 and a horizontal spring assembly 52, which are used to keep the curtain suspended when it is pulled up and down. In the above structure, the transmission rod 6 is controlled by the spring assembly 5, which in turn drives the cord winder 4. The traction cord 3 is wound on the cord winder 4. In this way, the spring force of the spring assembly 5 is stabilized by the transmission rod and the cord winder, making the drive of the traction cord 3 more stable and preventing excessive pulling on the traction cord. The force on the traction cords on both sides is more balanced. At the same time, the vertical spring block assembly 51 and the horizontal spring assembly 52 balance the spring force, making the curtain move more smoothly and stay suspended stably.

[0028] Further reference Figure 2 The vertical spring assembly 51 includes a first coiling rod 511, a second coiling rod 512, and a coil spring 513 arranged adjacent to each other. The first coiling rod 511 rotates synchronously with the transmission rod 6. One end of the coil spring 513 is fixedly mounted on the first coiling rod 511, and the other end is fixed to the second coiling rod 512 and wound around the second coiling rod 512. Specifically, the second coiling rod 512 remains stationary. When the transmission rod 6 rotates, the first coiling rod 511 rotates accordingly, which winds the coil spring 513 onto the first coiling rod 511, thereby storing energy in the coil spring 513.

[0029] Further reference Figure 3 The vertical spring assembly 51 contains a main gear 7, and the end of the first coil rod 511 is provided with a secondary gear 8 that meshes with the main gear 7. The main gear 7 is circumferentially fixedly connected to the transmission rod 6. The synchronous rotation of the transmission rod 6 and the first coil rod is achieved through the above gear structure.

[0030] As a further preferred option, to ensure the stability of the shell structure under stress, the main gear 7 is positioned in the middle of the first coiling rod 511 and the second coiling rod 512. In this way, the force exerted by the coiling spring 513 on the first coiling rod 511 and the second coiling rod 512, winding them inwards, also places the force transmitted by the main gear 7 in the middle. This ensures that the overall stress on the shell is in the middle position, resulting in structural stability. This avoids deformation and damage to the shell due to eccentric stress.

[0031] Further reference Figure 4-5The horizontal spring assembly 52 includes a base 521 and a rotating shaft 522 that rotatably engages with the base 521. The rotating shaft 522 is circumferentially fixedly connected to the transmission rod 6. One end of the base 521 is provided with an adjustment box 523, and the other end is provided with a plane bearing 524. One end of the rotating shaft 522 is provided with a damping end face 5221 that abuts against the plane bearing 524, and the other end passes through the adjustment box 523. A friction plate 5222 is provided on the damping end face 5221. A spring 525 is sleeved on the rotating shaft 522, and the two ends of the spring 525 abut against the adjustment box 523 and the friction plate 5222, respectively. Due to the elastic force of the spring 525, the rotating shaft will be subjected to axial force. Therefore, a plane bearing 524 is installed to reduce friction with the inner wall. Through the above structure, the spring 525 applies a force along the axial direction of the rotating shaft to the friction plate 5222, so that the friction plate 5222 and the damping end face 5221 abut against each other and generate frictional damping. This frictional damping generates resistance when the rotating shaft 522 rotates, thereby damping the rotation of the transmission rod 6.

[0032] Furthermore, to achieve adjustable damping, several limiting grooves 9 distributed axially are provided on the side wall of the base 521, and limiting members 91 that engage with the limiting grooves 9 are provided on the adjusting box 523. The axial movement of the adjusting box 523 is adjusted through the limiting members 91 and the limiting grooves 9. With the above structure, when the adjusting box 523 moves towards the damping end face 5221, the spring 525 tightens, which increases the frictional resistance between the friction plate 5222 and the damping end face 5221, and correspondingly increases the resistance to the rotation of the transmission rod 6. When the adjusting box 523 moves away from the damping end face 5221, the spring 525 relaxes, and the resistance to the rotation of the transmission rod 6 decreases. Thus, by adjusting the position of the adjusting box 523, in conjunction with the vertical spring assembly, the force on the transmission rod 6 during rotation remains continuous and constant, ensuring stable suspension.

[0033] Furthermore, refer to Figure 6 The adjustment box 523 is equipped with an adjustment button 10. The limiting member 91 includes a pair of limiting plates 911 and a telescopic spring 912 located between the pair of limiting plates 911. The adjustment button 10 extends to have a beveled surface 1001. Each of the pair of limiting plates 911 is provided with a beveled block 9111 that cooperates with the beveled surface 1001. The beveled surface 1001 has an inverted V-shaped structure. Under normal circumstances, the pair of limiting plates 911 are pushed out to both sides by the telescopic spring 912, so that the protrusions on the outer side of the limiting plates 911 engage with the limiting groove 9, thereby limiting the adjustment box 523. When it is necessary to change the position of the adjustment box 523, simply press the adjustment button 10. At this time, the beveled surface 1001 will guide the beveled block 9111 to move and drive the pair of limiting plates 911 to retract, thereby releasing the engagement with the limiting groove 9. The adjustment box 523 can then be adjusted in position as needed, thereby adjusting the rotational resistance of the rotating rod 6.

[0034] Furthermore, there are two sets of cord winders 4, which are respectively set on both sides of the curtain box, and the horizontal spring assembly 52 is set between the two sets of cord winders 4 to balance the force on the transmission rod 6.

[0035] Furthermore, the curtain body 2 includes a lower beam 21 fixedly installed at the bottom, and a traction rope 3 is fixedly connected to the lower beam 21. The curtain body 2 is raised and lowered by the traction rope 3 pulling the lower beam 21.

[0036] Furthermore, the curtain 2 in this embodiment includes, but is not limited to, cordless horizontal blinds such as Venetian blinds and honeycomb blinds.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cordless curtain system, comprising a curtain box (1), a curtain body (2), and a cord winding system, wherein the cord winding system is housed within the curtain box (1), and the pull cord (3) of the cord winding system extends out of the curtain box (1) and connects to the curtain body (2), characterized in that: The rope winding system includes a rope winder (4), a spring assembly (5), and a drive rod (6), which passes through the rope winder (4) and the spring assembly (5) to drive them synchronously; the spring assembly (5) includes a vertical spring block assembly (51) and a horizontal spring assembly (52), which are used to keep the curtain suspended when it is pulled up and down.

2. The cordless curtain system according to claim 1, characterized in that: The vertical spring assembly (51) includes a first coil rod (511), a second coil rod (512), and a coil spring (513) arranged adjacent to each other. The first coil rod (511) rotates synchronously with the transmission rod (6). One end of the coil spring (513) is fixedly disposed on the first coil rod (511), and the other end is fixedly disposed on the second coil rod (512) and wound around the second coil rod (512).

3. A cordless curtain system according to claim 2, characterized in that: The vertical spring assembly (51) is provided with a main gear (7), and the end of the first coil rod (511) is provided with a secondary gear (8) that meshes with the main gear (7). The main gear (7) is circumferentially fixedly connected to the transmission rod (6).

4. A cordless curtain system according to claim 3, characterized in that: The main gear (7) is positioned between the first winding rod (511) and the second winding rod (512).

5. A cordless curtain system according to claim 1, characterized in that: The horizontal spring assembly (52) includes a base (521) and a rotating shaft (522) that rotates with the base (521). The rotating shaft (522) is circumferentially fixedly connected to the transmission rod (6). One end of the base (521) is provided with an adjustment box (523), and the other end is provided with a plane bearing (524). One end of the rotating shaft (522) is provided with a damping end face (5221) that abuts against the plane bearing (524), and the other end passes through the adjustment box (523). A friction plate (5222) is provided on the damping end face (5221). A spring (525) is sleeved on the rotating shaft (522), and the two ends of the spring (525) abut against the adjustment box (523) and the friction plate (5222) respectively.

6. A cordless curtain system according to claim 5, characterized in that: The base (521) has a plurality of limiting grooves (9) distributed along the axial direction on its side wall, and the adjustment box (523) has a limiting member (91) that engages with the limiting grooves (9). The axial movement adjustment of the adjustment box (523) is achieved through the limiting member (91) and the limiting grooves (9).

7. A cordless curtain system according to claim 6, characterized in that: The adjustment box (523) is provided with an adjustment button (10). The limiting member (91) includes a pair of limiting pieces (911) and a telescopic spring (912) located between the pair of limiting pieces (911). The adjustment button (10) extends with a beveled part (1001). Each pair of limiting pieces (911) is provided with a beveled block (9111) that cooperates with the beveled part (1001). The beveled part (1001) has an inverted V-shaped structure.

8. A cordless curtain system according to claim 1, characterized in that: The rope winder (4) is provided in two sets, and the horizontal spring assembly (52) is provided between the two sets of rope winders (4).

9. A cordless curtain system according to claim 1, characterized in that: The curtain (2) includes a lower beam (21) fixedly installed at the bottom, and the traction rope (3) is fixedly connected to the lower beam (21).

10. A cordless curtain system according to claim 1, characterized in that: The curtain (2) includes, but is not limited to, Venetian blinds and honeycomb blinds.

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