Spring force adjusting device
By designing a spring-loaded adjustment device consisting of a bracket, a connecting mechanism, and a self-locking core, the system achieves a small space requirement, reliable self-locking, and convenient adjustment for curtains without drawers. This solves the problems of existing devices occupying a lot of space and being unsuitable for fine-tuning, thus improving the aesthetics and operational efficiency of the curtains.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-13
AI Technical Summary
Existing spring-loaded adjustment devices for curtains without drawers have issues such as taking up too much space or being unsuitable for fine-tuning by customers. Furthermore, when using a ratchet structure for reverse adjustment, the curtains need to be disassembled, which is inconvenient.
A spring force adjustment device is designed, comprising a bracket, a connecting mechanism, a self-locking core, a torsion spring mechanism, and a compression spring. Self-locking is achieved through the complementary tenon structure of the self-locking core and the bracket, the compression spring automatically locks, and the torsion spring is directly connected to the spring rod, thereby realizing bidirectional adjustment and concealed force adjustment structure.
It achieves the effects of small space, reliable self-locking, and convenient adjustment, reducing the distance between the curtain and the window frame, and improving the aesthetics of the curtain and the convenience of adjustment operation.
Smart Images
Figure CN223991717U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of curtain technology, and in particular to a spring adjustment device. Background Technology
[0002] Pull-free blinds are an innovative curtain design that eliminates the need for traditional pull cords or beaded chains, providing users with a more convenient, safe, and aesthetically pleasing curtain experience. The most significant feature of pull-free blinds is that they eliminate the need for pull cords or beaded chains to operate the curtains. This design makes using the blinds much simpler; users can control them simply by manually pushing or pulling or by touching a button (for motorized pull-free blinds).
[0003] Most curtains on the market that do not require draping use spring rods for opening and closing. During the production and use of curtains, a spring adjustment device is needed to adjust the spring torque to ensure that the curtain opening and closing function is normal. Existing spring adjustment devices on the market use a two-way torsion spring with self-locking feature to adjust the spring rod torque, which can be adjusted in both directions, but there is a risk of the spring head breaking and the self-locking function failing. They also take up a lot of space and increase the distance between the curtain and the window frame. Another type uses a ratchet structure, which has reliable self-locking and convenient one-way adjustment, but reverse adjustment requires disassembling the curtain, which is not suitable for customers to fine-tune. To solve the above problems, a spring adjustment device has been designed.
[0004] A cordless roller blind spring adjuster is disclosed in Chinese patent document No. WO2024146043A1. The cordless roller blind spring adjuster includes a roller blind spring pretension adjustment mechanism and a self-locking mechanism. Before the mounting bracket is installed, the self-locking mechanism is used to lock the adjustment shaft on the roller blind spring pretension adjustment mechanism. After the mounting bracket is installed, the self-locking mechanism unlocks the adjustment shaft on the roller blind spring pretension adjustment mechanism under the pressure of the mounting bracket. The self-locking mechanism includes a compression spring, a self-locking ring, and a fixing ring. The end face of the self-locking ring is provided with a top-pressure transmission rod and a ring of ratchet teeth A. Racket teeth A mesh with ratchet teeth B, and ratchet teeth A can slide unidirectionally relative to ratchet teeth B. One end of the top-pressure transmission rod extends out of the sleeve through the through hole on the adjusting wheel. The above patent improves the self-locking mechanism. When this patent is installed on the mounting code, manual operation is not required, and unlocking can be achieved through the mounting code. It also has the characteristics of simple structure, strong practicality, and convenient adjustment of the pretension force of the roller blind spring. However, this cordless roller blind spring adjuster uses a ratchet structure, and the curtain needs to be disassembled for reverse adjustment, which is not suitable for customers to fine-tune.
[0005] To address the shortcomings of the existing technology, providing a spring force adjustment device is a problem worthy of research. Utility Model Content
[0006] The purpose of this utility model is to overcome the shortcomings of large space occupation or unsuitability for customer fine adjustment, and to provide a spring force adjustment device that achieves the technical effect of small space occupation and convenient adjustment.
[0007] The objective of this utility model is achieved through the following technical solution:
[0008] A spring force adjustment device includes a bracket, a transfer mechanism disposed inside the bracket, and a support rod rotatably connected to the transfer mechanism. It also includes a torsion spring mechanism sleeved on the outside of the support rod, a self-locking core disposed between the bracket and the transfer mechanism, and a wrench engaged with the self-locking core.
[0009] The bracket is rotatably connected to the self-locking core. A bracket tenon is provided on the outer side of the bracket's rotating shaft, and a self-locking core tenon is provided on the outer side of one end of the self-locking core. The shapes of the bracket tenon and the self-locking core tenon are complementary. After the spring force adjustment device is adjusted, it can achieve self-locking and maintain the adjusted state.
[0010] A compression spring is sleeved on the outside of the self-locking core. The spring force of the compression spring pushes the self-locking core towards the bracket. The compression spring can automatically push the self-locking core back to the locked position, avoiding the need for manual locking after adjustment, making the force adjustment operation of the device more convenient and efficient.
[0011] The bracket has a guide groove on its inner side. The self-locking core is slidably connected to the bracket through the guide groove. The self-locking core can slide outward to release the lock while avoiding the situation where the self-locking core slides too far and detaches from the bracket.
[0012] The adapter mechanism includes a transmission core fixedly connected to the end of the self-locking core, a rotating cylinder sleeved on the outside of the self-locking core, and a cap, connector, large connector and small connector sequentially arranged at the end of the transmission core. The end of the small connector is fixedly connected to the end of the torsion spring mechanism, and the addition or subtraction of the spring rod torque is completed by the rotation of the torsion spring on the torsion spring mechanism.
[0013] The torsion spring mechanism includes a first torsion spring sleeved on the outside of the support rod, and a second torsion spring sleeved on the outside of the first torsion spring.
[0014] The diameter of the first torsion spring is smaller than that of the second torsion spring. The end of the first torsion spring is fixedly connected to the end of the small connector. When the curtain is quickly opened or closed, the elastic deformation of the second torsion spring can absorb the inertial impact force and reduce the wear of the transmission components.
[0015] The other end of the support rod is rotatably connected to an adapter. The end of the adapter is provided with a rotating core. The end of the rotating core is rotatably connected to a rotating wheel. The internal thread of the rotating wheel is connected to a locking screw. The end of the locking screw is pressed against the inside of the curtain frame. Rotating the rotating wheel can adjust the length of the extended part of the locking screw, thereby pressing the locking screw against the inner wall of the curtain frame, thus completing the tightening installation of the device.
[0016] The wrench and the self-locking core are assembled and connected by a snap-fit structure.
[0017] Positive and beneficial effects:
[0018] 1. This spring adjustment device has a reliable self-locking structure and can be adjusted in both directions. The adjustment structure is hidden inside the spring rod, which reduces the distance between the curtain and the window frame, making the curtain more beautiful.
[0019] 2. After the spring force adjustment device is completed, the compression spring can automatically push the self-locking core back to the locked position, avoiding the need for manual locking after adjustment, making the force adjustment operation of the device more convenient and efficient.
[0020] 3. In this spring adjustment device, the first torsion spring is directly connected to the spring rod. Rotating the small connector changes its preload, thereby adjusting the effective torque of the spring rod. When the user operates the wrench, the transmission core drives the first torsion spring to rotate. The increase or decrease of torque directly controls the opening and closing force of the curtain, realizing the adjustment of the spring force. Attached Figure Description
[0021] Figure 1 This is the assembly drawing of the spring rod of this utility model;
[0022] Figure 2 This is an exploded view of the spring rod of this utility model;
[0023] Figure 3 This is a structural diagram of the wrench in the pressed-down unlocked state of this utility model;
[0024] Figure 4 This is a structural diagram of the tenon assembly of this utility model.
[0025] In the diagram: 1. Bracket, 1-1. Bracket tenon, 2. Self-locking core, 2-1. Self-locking core tenon, 3. Compression spring, 4. Transmission core, 5. Rotary drum, 6. Cap, 7. Connector, 8. Large connector, 9. Small connector, 10. Support rod, 11. First torsion spring, 12. Second torsion spring, 13. Adapter, 14. Rotary core, 15. Rotary wheel, 16. Locking screw, 17. Wrench. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0027] Example 1
[0028] like Figures 1 to 4 As shown, a spring force adjustment device includes a bracket 1, a transfer mechanism disposed inside the bracket 1, and a support rod 10 rotatably connected to the transfer mechanism. It also includes a torsion spring mechanism sleeved on the outside of the support rod 10, a self-locking core 2 disposed between the bracket 1 and the transfer mechanism, and a wrench 17 engaged with the self-locking core 2.
[0029] like Figure 4 As shown, bracket 1 is rotatably connected to self-locking core 2. A bracket tenon 1-1 is provided on the outer side of the rotating shaft of bracket 1, and a self-locking core tenon 2-1 is provided on the outer side of one end of self-locking core 2. The shapes of bracket tenon 1-1 and self-locking core tenon 2-1 are complementary. By providing bracket tenon 1-1 and self-locking core tenon 2-1 on bracket 1 and self-locking core 2 respectively, the bracket 1 and self-locking core 2 are rotated and locked by the complementary cooperation of bracket tenon 1-1 and self-locking core tenon 2, so that the spring force adjustment device can achieve self-locking and maintain in the adjusted state after adjustment.
[0030] like Figures 1 to 3 As shown, a compression spring 3 is sleeved on the outside of the self-locking core 2. The elastic force of the compression spring 3 pushes the self-locking core 2 towards the bracket 1. By sleeved with the compression spring 3 on the outside of the self-locking core 2, the self-locking core 2 can maintain the engagement and locking of the bracket tenon 1-1 and the self-locking core tenon 2-1 under the action of the compression spring 3, avoiding the situation where the lock is loose due to insufficient engagement between the two. After the spring force adjustment is completed, the compression spring 3 can automatically push the self-locking core 2 back to the locked position, avoiding the need for manual locking after adjustment, making the force adjustment operation of the device more convenient and efficient.
[0031] The inner side of the bracket 1 is provided with a guide groove. The self-locking core 2 is slidably connected to the bracket 1 through the guide groove. By providing a guide groove on the bracket 1, the relative sliding stroke between the self-locking core 2 and the bracket 1 is limited, so that the self-locking core 2 can slide outward to release the lock, while avoiding the situation where the self-locking core 2 slides too far and becomes detached from the bracket 1.
[0032] Example 2
[0033] like Figures 1 to 3As shown, the adapter mechanism includes a transmission core 4 fixedly connected to the end of the self-locking core 2, a rotating cylinder 5 sleeved on the outside of the self-locking core 2, a cap 6, a connector 7, a large connector 8, and a small connector 9 sequentially arranged at the end of the transmission core 4. The end of the small connector 9 is fixedly connected to the end of the torsion spring mechanism. Through the transmission core 4, connector 7, large connector 8, and small connector 9, the torque of the rotation of the self-locking core 2 is transmitted to the torsion spring mechanism. The rotation of the torsion spring on the torsion spring mechanism completes the addition and subtraction of the torque of the spring rod.
[0034] like Figures 1 to 2 As shown, the torsion spring mechanism includes a first torsion spring 11 sleeved on the outside of the support rod 10, and a second torsion spring 12 sleeved on the outside of the first torsion spring 11.
[0035] The diameter of the first torsion spring 11 is smaller than that of the second torsion spring 12. The end of the first torsion spring 11 is fixedly connected to the end of the small connector 9. By setting the first torsion spring 11 on the outside of the support rod 10, the first torsion spring is directly connected to the spring rod. Rotating the small connector 9 changes its preload, thereby adjusting the effective torque of the spring rod. When the user operates the wrench, the transmission core drives the first torsion spring to rotate. The increase or decrease of torque directly controls the opening and closing force of the curtain, realizing the adjustment of the spring force. The elastic characteristics of the first torsion spring keep the curtain in tension balance at different opening positions, avoiding the curtain from drooping or being too tight, and extending its service life. The second torsion spring 12 is coaxially sleeved with the first torsion spring 11 but rotates in the opposite direction. It provides reverse torque through preload to offset the elastic deformation deviation of the first torsion spring 11 during the adjustment process, ensuring the linearity and accuracy of torque adjustment. Moreover, when the curtain is quickly opened and closed, the elastic deformation of the second torsion spring 12 can absorb the inertial impact force and reduce the wear of the transmission components.
[0036] This spring-loaded adjustment device is self-locking and reliable, and can be adjusted in both directions. The adjustment mechanism is hidden inside the spring rod, which reduces the distance between the curtain and the window frame, making the curtains more aesthetically pleasing.
[0037] Example 3
[0038] like Figures 1 to 2 As shown, the other end of the support rod 10 is rotatably connected to an adapter 13. The end of the adapter 13 is provided with a rotating core 14. The end of the rotating core 14 is rotatably connected to a rotating wheel 15. The rotating wheel 15 is internally threaded with a locking screw 16. By providing a threaded rotating wheel 15 and a locking screw 16 at the other end of the support rod 10, when installing the device, the end of the locking screw 16 is placed against the inside of the curtain frame. Rotating the rotating wheel 15 can adjust the length of the extended part of the locking screw 16, thereby pressing the locking screw 16 against the inner wall of the curtain frame, thus completing the tightening installation of the device.
[0039] like Figures 1 to 3As shown, the wrench 17 and the self-locking core 2 are assembled and connected by a snap-fit structure. By connecting the wrench 17 and the self-locking core 2 by snap-fit, the wrench 17 can be quickly disassembled. When it is necessary to adjust the self-locking core 2, the wrench 17 is assembled and pressed down to unlock it. Rotating the wrench 17 drives the self-locking core 2 to rotate. The self-locking core 2 drives the small connector 9 to rotate through the transmission core 4 and the connector 7. The small connector 9 is connected to the first torsion spring 11 and rotates to complete the addition and subtraction of the spring rod torque. When the wrench is released, the compressed spring 3 pushes the self-locking core 2 back to its original position. The tenon on the self-locking core 2 engages with the tenon on the bracket 1 to complete the locking.
[0040] The working principle of this utility model is as follows:
[0041] S1. When it is necessary to adjust the self-locking core 2, use the wrench 17 to assemble with the self-locking core 2 and press down to unlock it. Turn the wrench 17 to drive the self-locking core 2 to rotate.
[0042] S2, the self-locking core 2 drives the small connector 9 to rotate through the transmission core 4 and the connector 7. The small connector 9 is connected to the first torsion spring 11 and rotates to complete the addition and subtraction of the spring rod torque.
[0043] S3. Loosen the wrench, compress the spring 3 to push the self-locking core 2 back to its original position, and the tenon on the self-locking core 2 engages with the tenon on the bracket 1 to complete the locking.
[0044] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A spring force adjustment device, comprising a bracket (1), a transfer mechanism disposed inside the bracket (1), and a support rod (10) rotatably connected to the transfer mechanism, characterized in that: The torsion spring mechanism is sleeved outside the supporting rod (10), the self-locking core (2) is arranged between the support (1) and the adapter mechanism, and the wrench (17) is clamped with the self-locking core (2).
2. A force modulation device according to claim 1, characterised in that: The support (1) is rotatably connected with the self-locking core (2), the support tenon (1-1) is arranged outside the rotation shaft of the support (1), the self-locking core tenon (2-1) is arranged outside one end of the self-locking core (2), and the shapes of the support tenon (1-1) and the self-locking core tenon (2-1) are complementary to each other.
3. A force modulation device according to claim 2, wherein: The self-locking core (2) is sleeved with the compression spring (3) outside, and the elastic force of the compression spring (3) pushes the self-locking core (2) to the direction of the support (1).
4. A force modulation device according to claim 2, wherein: The inner side of the support (1) is provided with a guide groove, and the self-locking core (2) is slidably connected with the support (1) through the guide groove.
5. A force modulation device according to claim 1, wherein: The adapter mechanism comprises a transmission core (4) fixedly connected with the end of the self-locking core (2), a rotating barrel (5) sleeved outside the self-locking core (2), a cap (6), a connecting head (7), a large connector (8) and a small connector (9) assembled in sequence at the end of the transmission core (4), and the end of the small connector (9) is fixedly connected with the end of the torsion spring mechanism.
6. A force-modulating spring assembly according to claim 5, wherein: The torsion spring mechanism comprises a first torsion spring (11) sleeved outside the supporting rod (10) and a second torsion spring (12) sleeved outside the first torsion spring (11). The diameter of the first torsion spring (11) is smaller than that of the second torsion spring (12), and the end of the first torsion spring (11) is fixedly connected with the end of the small connector (9).
7. A force modulation device according to claim 1, wherein: The other end of the supporting rod (10) is rotatably connected with an adapter head (13), the end of the adapter head (13) is provided with a rotating core (14), the end of the rotating core (14) is rotatably connected with a rotating wheel (15), and the inside of the rotating wheel (15) is screw-connected with a locking screw (16).
8. A force modulation device according to claim 1, wherein: The wrench (17) is assembled and connected with the self-locking core (2) through the buckle structure.