Pre-tightening force external adjusting device of sun-shading roller shutter

Abstract

The pretightening force external adjusting device comprises a screw rod, a roller shutter shaft and the roller shutter, one end of the roller shutter is fixedly connected with the roller shutter shaft, the roller shutter shaft is connected with the screw rod in a screwed mode, the end, away from the roller shutter shaft, of the screw rod is fixedly connected with a suction cup, the outer side of the roller shutter shaft is rotationally connected with a rotary knob, the outer side of the screw rod is fixedly connected with a shaft sleeve, and the rotary knob is fixedly connected with the shaft sleeve. According to the pre-tightening force external adjusting device, due to the fact that the load is large when the screw rod and the roller shutter shaft are connected in a screwed mode, on one hand, the roller shutter shaft is sleeved with the rotary knob, the rotary knob is fixedly connected with the inner gear ring, on the other hand, the inner gear ring is fixedly connected to the outer portion of the shaft sleeve, and the outer gear ring is fixedly connected to the outer portion of the shaft sleeve. On the other hand, through the shaft sleeve arranged outside the screw in a sleeving mode, the shaft sleeve is fixedly connected with the outer toothed rail, and the outer toothed rail is connected with the inner gear ring in a meshed mode, loads generated when the screw is screwed with the roller shutter shaft can be shared, abrasion between the screw and the roller shutter shaft is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to a device for external adjustment of pre-tightening force, in particular to a device for external adjustment of pre-tightening force of a sunshade roller blind. Background Art

[0002] The external preload adjustment device for roller blinds is primarily used to adjust the preload, ensuring smooth and comfortable deployment and retraction. Adjusting the preload ensures proper tension and stability during deployment and retraction, enhancing user comfort and durability. Furthermore, the external preload adjustment device can be fine-tuned to suit different environments and applications.

[0003] Patent publication number CN219281637U discloses a pre-tightening force external adjustment device for sunshade roller blinds. The patent specifically discloses "a pre-tightening force external adjustment device for sunshade roller blinds, comprising an end seat, a roller blind housing, a roller drum, a roller blind head, a pre-tightening locking shaft, a pre-tightening torsion spring and a support member. The roller blind housing is wrapped around the outside of the roller drum, and end seats are symmetrically provided at both ends of the roller blind housing. The end seats are provided with locking holes and grooves. The pre-tightening locking shaft passes through the end seats and is threadedly connected to the locking holes and grooves. The roller blind head is sleeved on the pre-tightening locking shaft. The technical solution of "using the locking thread of the pre-tightening lock shaft to rotate in the opposite direction, cooperating with the pre-tightening lock shaft to drive one end of the pre-tightening torsion spring to further tighten or loosen the work, can effectively increase or reduce the pre-tightening force of the pre-tightening torsion spring, thereby achieving the comfort of unfolding or retracting the sunshade roller blind" is realized.

[0004] However, this patent has the problem of large load on the pre-tightening torsion spring in actual use, which results in a certain reduction in the service life of the pre-tightening torsion spring during actual use. Utility Model Content

[0005] The purpose of the utility model is to provide a pre-tightening force external adjustment device for a sunshade roller blind, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pre-tightening force external adjustment device for a sunshade roller blind, comprising a screw, a roller blind shaft and a roller blind, one end of the roller blind being fixedly connected to the roller blind shaft, the roller blind shaft being threadedly connected to the screw, a suction cup being fixedly connected to the end of the screw away from the roller blind shaft, a knob being connected to the outside of the roller blind shaft, a shaft sleeve being fixed to the outside of the screw, an inner gear ring being fixed to the inside of the knob, an outer gear rail being fixed to the outside of the shaft sleeve, and the outer gear rail being meshingly connected to the inner gear ring.

[0007] As a further solution of the present invention: a pre-tightening force external adjustment device for a sunshade roller blind, further comprising a screw fitting, wherein the screw fitting comprises an external thread and an internal thread, the internal thread is opened inside the roller blind shaft, the external thread is fixedly installed on the outside of the screw rod, and the external thread is adapted to the internal thread.

[0008] As a further solution of the present invention: a pre-tightening force external adjustment device for a sunshade roller blind, one end of the suction cup is fixedly connected to a seat gasket, and the seat gasket is made of spring steel.

[0009] As a further solution of the present invention: a pre-tightening force external adjustment device for a sunshade roller blind, one end of the suction cup is fixedly connected to a tensioning spring, and the tensioning springs are provided in several groups.

[0010] As a further solution of the present invention: a pre-tightening force external adjustment device for a sunshade roller blind, wherein the outer side of the knob is fixed with anti-slip grooves, and the anti-slip grooves are arranged in a ring array.

[0011] As a further solution of the present invention: a pre-tightening force external adjustment device for a sunshade roller blind, wherein the side walls of the roller blind are coated with a sun-proof paint.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. Since the load is relatively large when the screw and the roller blind shaft are screwed together, on the one hand, the knob is mounted on the outside of the roller blind shaft, and the knob is fixedly connected to the inner gear ring. On the other hand, the shaft sleeve is mounted on the outside of the screw, and the shaft sleeve is fixedly connected to the outer gear rail. The outer gear rail and the inner gear ring are meshed and connected, which can share the load generated when the screw and the roller blind shaft are screwed together, reduce the wear between the screw and the roller blind shaft, and extend the service life of the equipment.

[0014] 2. By setting the seat gasket and the tension spring, the axial distance between the wall, the suction cup, the screw and the roller blind shaft can be extended, so that the friction between the external thread and the internal thread in the screw joint is increased, and the stability of the screw joint after adjustment is improved, so that the screw joint is not easy to loosen, and thus the sunshade roller blind is not easy to loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a pre-tightening force external adjustment device for a sunshade roller blind according to the present invention;

[0016] Figure 2 This is a cross-sectional view of the interior of a gear set in a pre-tightening force external adjustment device for a sunshade roller blind according to the present invention;

[0017] Figure 3 This is one of the structural diagrams of the roller blind shaft and gear set in the pre-tightening force external adjustment device of the sunshade roller blind of the utility model;

[0018] Figure 4This is the second structural diagram of the roller blind shaft and gear set in the pre-tightening force external adjustment device of the sunshade roller blind of the utility model;

[0019] Figure 5 This is a schematic diagram of the central axis seat structure of a pre-tightening force external adjustment device for a sunshade roller blind according to the present invention;

[0020] In the figure: 1. Screw; 2. Roller blind shaft; 3. Roller blind; 4. Knob; 5. Bushing; 6. External rack; 7. Internal gear ring; 8. Suction cup; 9. Anti-slip groove; 10. Seat gasket; 11. Tension spring; 12. Threaded joint; 121. External thread; 122. Internal thread. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or connected in an integral manner; they can be mechanically connected or electrically connected; they can be directly connected, indirectly connected through an intermediate medium, or they can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The following describes the embodiments of the present invention based on its overall structure.

[0023] In an embodiment of the utility model, a pre-tightening force external adjustment device for a sunshade roller blind comprises a screw 1, a roller blind shaft 2 and a roller blind 3, one end of the roller blind 3 is fixedly connected to the roller blind shaft 2, the roller blind shaft 2 is threadedly connected to the screw 1, a suction cup 8 is fixedly connected to the end of the screw 1 away from the roller blind shaft 2, a knob 4 is connected to the outside of the roller blind shaft 2, a shaft sleeve 5 is fixedly connected to the outside of the screw 1, an inner gear ring 7 is fixedly connected to the inside of the knob 4, an outer gear rail 6 is fixedly connected to the outside of the shaft sleeve 5, and the outer gear rail 6 is meshed with the inner gear ring 7.

[0024] Other embodiments of the present invention: A pre-tightening force external adjustment device for a sunshade roller blind, further comprising a screw 12, wherein the screw 12 comprises an external thread 121 and an internal thread 122, wherein the internal thread 122 is provided inside the roller blind shaft 2, and the external thread 121 is fixedly mounted on the outside of the screw rod 1, and the external thread 121 is adapted to the internal thread 122.

[0025] Other embodiments of the present invention: A pre-tightening force external adjustment device for a sunshade roller blind, wherein one end of the suction cup 8 is fixedly connected to a seat gasket 10, and the seat gasket 10 is made of spring steel.

[0026] Other embodiments of the present invention: A pre-tightening force external adjustment device for a sunshade roller blind, wherein one end of the suction cup 8 is fixedly connected to a tensioning spring 11, and the tensioning spring 11 is provided in several groups.

[0027] Other embodiments of the present invention: A pre-tightening force external adjustment device for a sunshade roller blind, wherein the outer side of the knob 4 is fixedly connected with anti-slip grooves 9, and the anti-slip grooves 9 are arranged in a ring array.

[0028] Other embodiments of the present invention: A pre-tightening force external adjustment device for a sunshade roller blind, wherein the side walls of the roller blind 3 are coated with a sun-proof paint.

[0029] The working principle of the present utility model is: since the load is relatively large when the screw 1 and the rolling curtain shaft 2 are screwed together, on the one hand, the knob 4 is sleeved on the outside of the rolling curtain shaft 2, and the knob 4 is fixedly connected to the inner gear ring 7. On the other hand, the shaft sleeve 5 is sleeved on the outside of the screw 1, and the shaft sleeve 5 is fixedly connected to the outer gear rail 6. The outer gear rail 6 and the inner gear ring 7 are meshed and connected, which can share the load generated when the screw 1 and the rolling curtain shaft 2 are screwed together, reduce the wear between the screw 1 and the rolling curtain shaft 2, and improve the service life of the equipment.

[0030] By setting the seat gasket 10 and the tensioning spring 11, the axial distance between the wall, the suction cup 8, the screw 1 and the roller blind shaft 2 can be extended, so that the friction between the external thread 121 and the internal thread 122 in the screw 12 is increased, and the stability of the screw 12 after adjustment is improved, so that the screw 12 is not easy to loosen, and thus the sunshade roller blind is not easy to loosen.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pre-tightening force external adjustment device for a sunshade roller blind, characterized in that: The invention comprises a screw rod (1), a curtain roller shaft (2) and a curtain roller (3), wherein one end of the curtain roller (3) is fixedly connected to the curtain roller shaft (2), the curtain roller shaft (2) is screwedly connected to the screw rod (1), the end of the screw rod (1) away from the curtain roller shaft (2) is fixedly connected to a suction cup (8), the outer side of the curtain roller shaft (2) is connected to a knob (4), the outer side of the screw rod (1) is fixedly connected to a shaft sleeve (5), the inner side of the knob (4) is fixedly connected to an inner gear ring (7), the outer side of the shaft sleeve (5) is fixedly connected to an outer gear rail (6), and the outer gear rail (6) is meshedly connected to the inner gear ring (7).

2. The pre-tightening force external adjustment device of the sunshade roller blind according to claim 1, characterized in that: It also includes a screw fitting (12), the screw fitting (12) including an external thread (121) and an internal thread (122), the internal thread (122) is opened inside the roller blind shaft (2), the external thread (121) is fixedly installed outside the screw rod (1), and the external thread (121) is adapted to the internal thread (122).

3. The pre-tightening force external adjustment device of the sunshade roller blind according to claim 2, characterized in that: One end of the suction cup (8) is fixedly connected with a seat pad (10), and the seat pad (10) is made of spring steel.

4. The pre-tightening force external adjustment device for sunshade roller blinds according to claim 3, characterized in that: One end of the suction cup (8) is fixedly connected to a tensioning spring (11), and the tensioning spring (11) is provided in several groups.

5. The pre-tightening force external adjustment device for sunshade roller blinds according to claim 4, characterized in that: The outer side of the knob (4) is fixedly connected with anti-slip grooves (9), and the anti-slip grooves (9) are arranged in a ring array.

6. The pre-tightening force external adjustment device for sunshade roller blinds according to claim 5, characterized in that: The side walls of the roller blind (3) are coated with sunscreen paint.

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