Roller shutter pull rope resistance adjusting device

Abstract

The utility model relates to a resistance adjusting device for a roller shutter pull rope. The resistance adjusting device comprises a hollow base, the base is used for allowing a pull rope to penetrate through; the limiting assembly is mounted in the base; the limiting assembly comprises an upper limiting rod and two lower limiting rods; the height of the two lower limiting rods is smaller than that of the upper limiting rod; the adjusting assembly is movably connected with the base; the adjusting assembly comprises an adjusting rod, a U-shaped support and a bolt. The bolt penetrates through the bottom end of the U-shaped support and then abuts against the bottom end of the base, the adjusting rod is fixedly connected to the top end of the U-shaped support, and the pull rope penetrates between the adjusting rod and the two lower limiting rods. The roller shutter pull rope resistance adjusting device is simple in structure and convenient to use, the height of the adjusting rod can be changed through cooperation of the bolt and the U-shaped support, the resistance borne by the pull rope is controlled, the roller shutter pull rope resistance adjusting device can conveniently adapt to roller shutters of different weights, the operation hand feeling is effectively improved, and the service life is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling curtain pull cord resistance adjustment, in particular to a rolling curtain pull cord resistance adjustment device. Background Art

[0002] The pull rope is the transmission component that controls the opening and closing of the roller shutter. Through a carefully designed mechanical structure, it converts manpower into power to drive the roller shutter up and down, thereby controlling the rolling up or unfolding of the roller shutter, thereby achieving the raising and lowering of the roller shutter.

[0003] Traditional roller blind cords have a fixed resistance, making them incapable of adapting to varying roller blind weights. Since the resistance cannot be adjusted based on actual needs, these fixed-resistance cords can cause unnecessary friction and wear on the mechanical structure during operation. Over time, this wear not only affects the roller blind's operating feel but also accelerates damage to the cord and mechanical structure, shortening their service life. Utility Model Content

[0004] Based on this, the utility model provides a roller blind cord resistance adjustment device with a simple structure and easy use. The height of the adjustment rod can be changed by cooperating with the bolt and the U-shaped bracket to control the resistance of the cord, which is convenient for adapting to roller blinds of different weights and effectively improves the operating feel and service life.

[0005] In order to achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0006] A device for adjusting the resistance of a roller blind cord, comprising:

[0007] The base is hollow and is used for threading the pull rope;

[0008] A limit assembly installed inside the base; the limit assembly includes an upper limit rod movably installed inside one end of the base, and two lower limit rods movably installed on one side of the upper limit rod; the height of the two lower limit rods is smaller than the height of the upper limit rod; and

[0009] An adjustment component movably connected to the base; the adjustment component includes an adjustment rod movably installed between the two lower limit rods after passing through the base, a U-shaped bracket slidably connected to the outer wall of the base, and a bolt screwed to the bottom end of the U-shaped bracket; the bolt passes through the bottom end of the U-shaped bracket and abuts the bottom end of the base, the adjustment rod is fixedly connected to the top end of the U-shaped bracket, and the pull rope passes between the adjustment rod and the two lower limit rods.

[0010] The above-mentioned roller blind cord resistance adjustment device has a simple structure and is easy to use. The height of the adjustment rod can be changed by cooperating with the bolt and the U-shaped bracket to control the resistance of the cord, which is convenient for adapting to roller blinds of different weights and effectively improves the operating feel and service life.

[0011] In one embodiment, the base is provided with side openings at opposite ends thereof, the side openings are connected to the interior of the base, and the side openings are used for passing the pull rope; the top of the base is provided with a top opening, and the top opening is connected to the interior of the base.

[0012] In one embodiment, first limiting grooves are respectively provided on the inner walls on both sides of one end of the base, and the first limiting grooves extend upward from the interior of the base to the top opening; the opposite ends of the upper limiting rod are matched and accommodated in the interior of the first limiting grooves.

[0013] In one embodiment, two second limiting grooves are provided on the inner walls on opposite sides of the base, corresponding to one side of the first limiting groove, and the second limiting grooves extend upward from the interior of the base to the top opening; the opposite ends of the lower limiting rod are matched and accommodated in the interior of the second limiting grooves.

[0014] In one embodiment, the length of the second limiting groove is greater than the length of the first limiting groove.

[0015] In one embodiment, a sliding groove is provided on the outer walls on opposite sides of the base, and the bottom end of the sliding groove extends downward to the bottom end of the base. The sliding groove is arranged corresponding to the third limiting groove, and the third limiting groove passes through the sliding groove; the opposite ends of the adjusting rod are matched with sliding grooves.

[0016] In one embodiment, the first limiting groove, the second limiting groove and the third limiting groove are arranged parallel to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of a roller blind cord resistance adjustment device according to one embodiment of the present invention;

[0018] Figure 2 for Figure 1 An exploded schematic diagram of a roller blind cord resistance adjustment device is shown;

[0019] Figure 3 for Figure 2 A three-dimensional schematic diagram of a base in a roller blind cord resistance adjustment device is shown;

[0020] Figure 4 for Figure 1 A half-section schematic diagram of a roller blind cord resistance adjustment device is shown;

[0021] Figure 5 for Figure 1 A cross-sectional schematic diagram of the roller blind cord resistance adjustment device in an applied state is shown;

[0022] Figure 6 for Figure 5 An enlarged schematic diagram of circle A is shown.

[0023] Description of the accompanying drawings:

[0024] 10-base, 11-side opening, 12-top opening, 13-first limiting groove, 14-second limiting groove, 15-third limiting groove, 16-slide groove, 17-wire hole, 18-pit;

[0025] 20-limiting assembly, 21-upper limit rod, 22-lower limit rod;

[0026] 30-adjustment assembly, 31-adjustment rod, 32-U-shaped bracket, 320-internal threaded hole, 33-bolt;

[0027] 40-pull rope;

[0028] 50-upper rail;

[0029] 60-spring box;

[0030] 70-lower track. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0032] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] See also Figures 1 to 6 , which is a roller blind rope resistance adjustment device of an embodiment of the present invention, includes a hollow base 10, a limiting component 20 installed inside the base 10, and an adjustment component 30 movably connected to the base 10.

[0035] The base 10 has side openings 11 at opposite ends thereof, the side openings 11 communicating with the interior of the base 11 and being used for passing the pull rope 40 . The base 10 has a top opening 12 at its top, communicating with the interior of the base 11 .

[0036] First limiting grooves 13 are respectively formed on two opposite inner walls of one end of the base 10 . The first limiting grooves 13 extend upward from the interior of the base 10 to the top opening 12 .

[0037] Two second limiting grooves 14 are provided on opposite inner walls of the base 10, one corresponding to the first limiting groove 13, and are spaced apart from each other. The second limiting grooves 14 extend upward from the interior of the base 10 to the top opening 12. The length of the second limiting grooves 14 is greater than that of the first limiting grooves 13.

[0038] Third limiting grooves 15 are respectively provided on the inner walls of two opposite sides of the base 10 corresponding to the second limiting grooves 14 . The third limiting grooves 15 extend upward from the interior of the base 10 to the top opening 12 .

[0039] A sliding groove 16 is provided on the outer walls of opposite sides of the base 10 , and the bottom end of the sliding groove 16 extends downward to the bottom end of the base 10 . The sliding groove 16 is corresponding to the third limiting groove 15 , and the third limiting groove 15 passes through the sliding groove 16 .

[0040] In this embodiment, the first limiting groove 13 , the second limiting groove 14 and the third limiting groove 15 are arranged parallel to each other.

[0041] A wire hole 17 is provided at the bottom of the base 10, away from the first limiting groove 13. The wire hole 17 is located below the third limiting groove 15 and is used to pass the pull rope 40. A pit 18 is also provided at the bottom of the base 10, corresponding to the position between the two slide grooves 16, for positioning the adjustment assembly 30.

[0042] The limiting assembly 20 includes an upper limiting rod 21 movably mounted inside one end of the base 10 , and two lower limiting rods 22 movably mounted on one side of the upper limiting rod 21 ; the height of the two lower limiting rods 22 is smaller than that of the upper limiting rod 21 .

[0043] Specifically, the opposite ends of the upper limit rod 21 are matched and accommodated in the interior of the first limit groove 13; the opposite ends of the lower limit rod 22 are matched and accommodated in the interior of the second limit groove 14, and the lower limit rod 22 is arranged parallel to the upper limit rod 21 and spaced apart.

[0044] The adjustment assembly 30 includes an adjustment rod 31 that passes through the base 10 and is movably mounted between the two lower limit rods 22; a U-shaped bracket 32 ​​that is slidably connected to the outer wall of the base 10; and a bolt 33 that is screwed to the bottom end of the U-shaped bracket 32. The bolt 33 passes through the bottom end of the U-shaped bracket and abuts the bottom end of the base 10. The adjustment rod 33 is fixedly connected to the top end of the U-shaped bracket 32, and the opposite ends of the adjustment rod 33 are matched with the slide grooves 16. The pull rope 40 passes between the adjustment rod 33 and the two lower limit rods 22.

[0045] like Figure 5 and Figure 6 As shown, the base 10 is mounted on the bottom surface of the upper rail 50. One end of the pull cord 40 is used to connect to the spring box 60. The other end of the pull cord 40 passes through the base 10 and downwardly connects to the lower rail 70 and the roller blind (not shown). The bolt 33 cooperates with the U-shaped bracket 32 ​​to adjust the height of the adjustment rod 31, controlling the resistance of the pull cord 40. This facilitates the adaptation of roller blinds of different weights, effectively improving the operating feel and service life.

[0046] In this embodiment, if Figure 6 As shown, the pull rope 40 is located between the upper limit rod 21 and the lower limit rod 22 ; the pull rope 40 is located below the adjustment rod 33 , and the pull rope 40 is located above the two lower limit rods 22 .

[0047] Furthermore, in this embodiment, Figure 2 As shown, the opposite sides of the U-shaped bracket 32 ​​fit into the interior of the chute 16. The bottom end of the U-shaped bracket 32 ​​is provided with an internally threaded hole 320, which mates with a bolt 33. The internally threaded hole 320 is arranged corresponding to the recess 18. The bolt 33 passes through the bottom end of the U-shaped bracket and is inserted into the interior of the recess 18.

[0048] The above-mentioned roller blind rope resistance adjustment device has a simple structure and is easy to use. The height of the adjustment rod 31 can be changed by cooperating with the bolt 33 and the U-shaped bracket 32, thereby controlling the resistance applied to the rope 40, thereby facilitating adaptation to roller blinds of different weights and effectively improving the operating feel and service life.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A roller blind cord resistance adjustment device, characterized in that: include: A hollow base; The base is used for threading the pull rope; A limit assembly installed inside the base; the limit assembly includes an upper limit rod movably installed inside one end of the base, and two lower limit rods movably installed on one side of the upper limit rod; the height of the two lower limit rods is smaller than that of the upper limit rod; and An adjustment component movably connected to the base; the adjustment component includes an adjustment rod movably installed between the two lower limit rods after passing through the base, a U-shaped bracket slidably connected to the outer wall of the base, and a bolt screwed to the bottom end of the U-shaped bracket; the bolt passes through the bottom end of the U-shaped bracket and abuts the bottom end of the base, the adjustment rod is fixedly connected to the top end of the U-shaped bracket, and the pull rope passes between the adjustment rod and the two lower limit rods.

2. The roller blind cord resistance adjustment device according to claim 1, characterized in that: The base is provided with side openings at opposite ends thereof, the side openings being connected to the interior of the base and being used for passing the draw rope; the top of the base is provided with a top opening, being connected to the interior of the base.

3. The roller blind cord resistance adjustment device according to claim 2, characterized in that: A first limiting groove is respectively provided on the inner walls on both sides of one end of the base, and the first limiting groove extends upward from the interior of the base to the top opening; the opposite ends of the upper limiting rod are matched and accommodated in the interior of the first limiting groove.

4. The roller blind cord resistance adjustment device according to claim 2, characterized in that: Two second limiting grooves are arranged at intervals on the inner walls on the opposite sides of the base, corresponding to one side of the first limiting groove. The second limiting grooves extend upward from the inside of the base to the top opening; the opposite ends of the lower limiting rod are matched and accommodated in the inside of the second limiting grooves.

5. The roller blind cord resistance adjustment device according to claim 4, characterized in that: The length of the second limiting groove is greater than that of the first limiting groove.

6. The roller blind cord resistance adjustment device according to claim 4, characterized in that: There are sliding grooves on the outer walls of the opposite sides of the base, and the bottom ends of the sliding grooves extend downward to the bottom end of the base. The sliding grooves are corresponding to the third limiting grooves, and the third limiting grooves pass through the sliding grooves; the opposite ends of the adjusting rods are matched with sliding grooves.

7. The roller blind cord resistance adjustment device according to claim 6, characterized in that: The first limiting groove, the second limiting groove and the third limiting groove are arranged parallel to each other.

Images