Spring curtain rolling device capable of adjusting pre-loading force

Abstract

The utility model relates to the technical field of roller shutters, and discloses a spring roller shutter capable of adjusting pre-loading force, which comprises a spring bar, a rotating disc and a limit spring sleeved on the spring bar, one end of the spring bar is detachably connected with a positioning piece, a rotating plug is rotatably connected outside the positioning piece, the positioning piece is fixedly connected with one end of the spring bar, and the other end of the spring bar is fixedly connected with the rotating disc. The positioning piece is provided with a first mounting groove, one end of the spring bar is arranged in the first mounting groove, the positioning piece is in threaded connection with a first locking bolt used for locking one end of the spring bar, the positioning piece is provided with a first threaded hole corresponding to the first locking bolt, and the first locking bolt penetrates through the first threaded hole; one end of the first locking bolt abuts against the spring bar so that one end of the spring bar can be fixed to the positioning piece. According to the spring roller blind device capable of adjusting the pre-upper force, the positioning piece and the spring bar are fixed through the first locking bolt, the spring bar does not need to be holed, the structural strength of the spring bar cannot be weakened, and the spring bar is not prone to breakage.

Description

Technical Field

[0001] The utility model relates to the technical field of roller blinds, in particular to a spring roller blind with adjustable preload force. Background Art

[0002] The spring roller is a commonly used component in roller blinds, which can be used to realize the lifting and lowering of curtains. The tension of the limit spring in the commonly used spring roller is fixed, and it is difficult for users to adjust and change it according to their needs. In the utility model patent with patent application number 202321690054.6, a spring roller for adjusting preload force is disclosed. The key points of its technical solution are that it includes a spring rod, a rotating disk and a limit spring sleeved on the spring rod. One end of the spring rod is detachably connected with a positioning piece. When the rotating disk is rotated by external force, the rotating disk abuts against one of the vertical parts, so that the torsion spring is relaxed, and a gap is formed between the positioning piece, so that the rotating disk drives the torsion spring to rotate together, and pushes the rotating plug to rotate. The rotating disk is placed outside the positioning piece, which is convenient for the user to adjust the tension of the limit spring by rotating the rotating disk. It is convenient and there is no need to disassemble and assemble the positioning piece. The setting of two torsion springs increases the resistance to the rotation of the rotating plug when the rotating disk does not rotate, thereby improving the clamping force between the torsion spring and the positioning piece.

[0003] However, in the above patents or some existing spring roller shutters, the following technical problems exist: 1. One end of the positioning member is sleeved on the inner side of the spring rod, and the positioning member and the spring rod are provided with coaxial pin holes in the radial direction at the sleeved portion of the two. A pin shaft is installed at the pin hole position by knocking in or the like, and the pin shaft passes through the positioning member and the spring rod to fix the positioning member and the spring rod; but in this fixing method, since the end of the positioning member needs to be sleeved on the inner side of the spring rod, the diameter of the end of the positioning member is designed to be smaller. After the through pin hole is opened, the structural strength will be reduced. The reason is that a considerable part of the material of the annular wall of the positioning member in the circumferential direction at the pin hole will be removed due to the opening of the pin hole. The larger the diameter of the pin hole, the more material will be removed, and the lower the structural strength will be, which will lead to the problem of structural fracture at the pin hole.

[0004] 2. The limit spring and the external thread of the rotating plug are fixed by interlocking. In this fixing method, the wire diameter of the limit spring needs to match the diameter of the external thread of the rotating plug. Therefore, the optional wire diameter of the limit spring is relatively single, which cannot meet the demand for selecting limit springs of different wire diameters.

[0005] 3. In the complete spring roller shutter product, the limit spring outer shell is provided with a roller shutter tube, and the limit spring in the spring roller shutter device is completely exposed (there is no partition between the inner wall of the roller shutter tube and the limit spring). The exposed limit spring will twist and deform (including part of the radial deformation) when it is subjected to force during use, causing the limit spring to touch and hit the inner wall of the roller shutter tube when rotating, making noise, and when the limit spring is deformed greatly, its elastic performance is also affected, affecting the user experience. Utility Model Content

[0006] To solve at least one aspect of the above problems, the utility model provides a spring roller with adjustable preload force, comprising a spring rod, a rotating disk and a limit spring sleeved on the spring rod, one end of the spring rod is detachably connected to a positioning piece, the positioning piece is rotatably connected to a rotating plug outside the positioning piece, the positioning piece is fixedly connected to one end of the spring rod, the positioning piece is provided with a first mounting groove, one end of the spring rod is placed in the first mounting groove, the positioning piece is threadedly connected with a first locking bolt for locking one end of the spring rod, the positioning piece is provided with a first threaded hole corresponding to the first locking bolt, the first locking bolt passes through the first threaded hole, and one end of the first locking bolt abuts against the spring rod to fix one end of the spring rod to the positioning piece; in the spring roller with adjustable preload force of the utility model, the positioning piece and the spring rod are fixed by the first locking bolt, there is no need to open a hole in the spring rod, the structural strength of the spring rod will not be weakened, and the spring rod is not easy to break.

[0007] Optionally, the longitudinal section of the spring rod is a regular polygon, and the first mounting groove is adapted to the longitudinal section of the spring rod.

[0008] Optionally, two first locking bolts are arranged opposite to each other.

[0009] Optionally, a first guiding slope is provided at the notch of the first mounting groove.

[0010] Optionally, a limiting sleeve is arranged between the positioning member and the rotating plug, and a limiting flange corresponding to the limiting sleeve is arranged on the inner side wall of the rotating plug, and the side end of the limiting sleeve abuts against the limiting flange. A through hole corresponding to the first locking bolt is opened on the limiting sleeve, and one end of the first locking bolt away from the spring rod is placed in the through hole.

[0011] Optionally, a second guide slope corresponding to the limiting sleeve is provided at a side end of the positioning member.

[0012] Optionally, the rotating plug is connected to the limit spring, and the rotating plug is provided with a first limit protrusion and a second limit protrusion corresponding to the limit spring. The limit spring is spirally shaped and has a spiral gap. The first limit protrusion is placed in the spiral gap, and the second limit protrusion is used to abut against the end of the limit spring for limiting.

[0013] Optionally, a plurality of the first limiting protrusions are arranged in an annular manner with equal intervals, and an arc-shaped portion is arranged on the top of the first limiting protrusion.

[0014] Optionally, a mounting sleeve is sleeved on the outer side of the rotating plug, and the limit spring is placed on the inner side of the mounting sleeve.

[0015] Optionally, one end of the spring rod away from the positioning member is connected to a limiting mechanism, and the side of the limiting mechanism away from the spring rod is connected to a reducer and a positioner; the limiting mechanism is used to limit the lifting height of the curtain, the limiting mechanism includes a threaded rod and a rotating plug sleeved outside the threaded rod, the end of the spring rod away from the positioning member is fixedly connected to the positioner, the positioner includes a fixing sleeve for being fixedly connected to the spring rod, the fixing sleeve is provided with a second mounting groove, the end of the spring rod away from the positioning member is placed in the first mounting groove, the fixing sleeve is provided with a second threaded hole, and a second locking bolt for locking the spring rod is threaded in the second threaded hole; a third limiting protrusion and a fourth limiting protrusion are provided on the side wall of the rotating plug, the limiting spring is spirally shaped and formed with a spiral gap, the third limiting protrusion is placed in the spiral gap, and the fourth limiting protrusion is used to abut against the end of the limiting spring for limiting.

[0016] Compared with the prior art, the utility model has an adjustable preload spring roller, in which the positioning member and the spring rod are fixed by a first locking bolt, and there is no need to drill a hole in the spring rod, which will not weaken the structural strength of the spring rod and will not easily break the spring rod; a first guide slope is provided at the notch of the first mounting groove, which is convenient for one end of the spring rod to be introduced into the first mounting groove, thereby reducing the difficulty of assembly; a first limiting protrusion is placed in the spiral gap to position the limiting spring and the rotating plug, and the height of the first limiting protrusion can be adapted to the limiting springs of different wire diameters; a plurality of first limiting protrusions are arranged in an annular shape at equal intervals, and the positioning force points are evenly distributed, and the positioning effect is good; an arc portion is provided on the top of the first limiting protrusion, and the arc portion facilitates the introduction of the first limiting protrusion into the spiral gap, thereby reducing the difficulty of assembly; a mounting sleeve is provided on the outer side of the rotating plug, and the limiting spring is placed on the inner side of the mounting sleeve, and the mounting sleeve can limit the deformation of the limiting spring, avoid excessive distortion and deformation of the limiting spring after being stressed, avoid hitting the inner wall of the rolling tube during use, reduce noise, and provide a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a spring shutter roller with adjustable preload force according to the utility model;

[0018] Figure 2 It is a cross-sectional view of the spring shutter roller with adjustable preload force of the utility model;

[0019] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of middle part B;

[0021] Figure 5 The structure diagram of the utility model of the spring curtain roller with adjustable preload after removing the installation sleeve Figure 1 ;

[0022] Figure 6 for Figure 5 Enlarged view of the middle C part;

[0023] Figure 7 The structure diagram of the utility model of the spring curtain roller with adjustable preload after removing the installation sleeve Figure 2 ;

[0024] Figure 8 for Figure 7 Enlarged view of the middle D part;

[0025] Fig. 9 It is a structural schematic diagram of the positioning member of the spring shutter roller with adjustable preload force of the utility model;

[0026] Fig.10 It is a structural schematic diagram of the fixing sleeve part of the spring curtain roller with adjustable preload force of the utility model;

[0027] The names of the components corresponding to the various figure marks in the figure are: 1 is a spring rod, 2 is a rotating disk, 3 is a limit spring, 301 is a spiral gap, 4 is a positioning member, 401 is a first mounting groove, 4011 is a first guide slope, 402 is a first locking bolt, 403 is a first threaded hole, 404 is a limit sleeve, 4041 is a through hole, 405 is a second guide slope, 5 is a rotating plug, 501 is a limit flange, 502 is a first limit protrusion, 5021 is an arc portion, 503 is a second limit protrusion, 504 is a mounting sleeve, 7 is a limit mechanism, 71 is a threaded rod, 72 is a rotating plug, 721 is a third limit protrusion, 722 is a fourth limit protrusion, 8 is a reducer, 9 is a positioner, 91 is a fixing sleeve, 911 is a second mounting groove, 912 is a second threaded hole, and 10 is a third locking bolt. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0031] See also Figure 1-Figure 10 The utility model provides a spring roller shutter with adjustable preload, comprising: a spring rod 1, a rotating disk 2, and a limit spring 3 sleeved on the spring rod 1, one end of the spring rod 1 is detachably connected to a positioning member 4, a rotating plug 5 is rotatably connected to the outside of the positioning member 4, and the rotating disk 2 is sleeved outside the positioning member 4; the tension of the limit spring 3 is increased or decreased by rotating the rotating disk 2, and the rotating disk 2 is a prior art and is not described here; the positioning member 4 is fixedly connected to one end of the spring rod 1, and a first mounting groove 401 is provided on the positioning member 4, and one end of the spring rod 1 is placed in the first mounting groove 401, a first locking bolt 402 for locking one end of the spring rod 1 is threadedly connected to the positioning member 4, and a first threaded hole 403 corresponding to the first locking bolt 402 is opened on the positioning member 4, the first locking bolt 402 passes through the first threaded hole 403, and one end of the first locking bolt 402 abuts against the spring rod 1 to fix one end of the spring rod 1 to the positioning member 4; in the utility model, the positioning member and the spring rod are fixed by the first locking bolt, and there is no need to drill a hole in the spring rod, which will not weaken the structural strength of the spring rod and the spring rod is not easy to break.

[0032] See also Figure 2 , Figure 3 and Fig. 9, the longitudinal section of the spring rod 1 is a regular polygon, and the first mounting groove 401 is adapted to the longitudinal section of the spring rod 1. In this embodiment, the longitudinal section of the spring rod 1 is a regular quadrilateral, and the first mounting groove 401 is correspondingly set to a square groove, so that the spring rod 1 and the positioning member 4 rotate synchronously; two first locking bolts 402 are relatively arranged, and the locking of the positioning member and the spring rod is more firm, not easy to displace, and has good running stability; a first guide inclined surface 4011 is arranged at the notch of the first mounting groove 401, which is convenient for one end of the spring rod 1 to be introduced into the first mounting groove 401, reducing the difficulty of assembly; a limiting sleeve 404 is arranged between the positioning member 4 and the rotating plug 5, and a limiting flange 501 corresponding to the limiting sleeve 404 is arranged on the inner side wall of the rotating plug 5, and the limiting The flange 501 is arranged in an annular shape, and the side end of the limiting sleeve 404 is pressed against the limiting flange 501 for limiting. The limiting sleeve 404 is provided with a through hole 4041 corresponding to the first locking bolt 402, and the end of the first locking bolt 402 away from the spring rod 1 is placed in the through hole 4041, that is, a part of the first locking bolt 402 will fall into the through hole 4041, so that it is not easy for the limiting sleeve 404 and the positioning member 4 to have relative displacement in the axial direction; due to the action of the limiting sleeve 404, the positioning member 4 is not easy to be displaced to the right relative to the rotating plug 5, and the structure is stable; the side end of the positioning member 4 is provided with a second guide inclined surface 405 corresponding to the limiting sleeve 404, which facilitates the positioning member 4 to be inserted into the inner side of the limiting sleeve 404, thereby reducing the difficulty of assembly.

[0033] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Fig. 9 , the rotating plug 5 is connected to the limit spring 3, and the rotating plug 5 is provided with a first limit protrusion 502 and a second limit protrusion 503 corresponding to the limit spring 3. The limit spring 3 is spiral and has a spiral gap 301. The first limit protrusion 502 is placed in the spiral gap 301 to position the limit spring 3 and the rotating plug 5, and the protruding height of the first limit protrusion 502 can be adapted to the limit springs 3 of different wire diameters. The wire diameter of the limit spring 3 only needs to be able to abut against the side end surface of the first limit protrusion 502; the second The limiting protrusion 503 is used to limit the end of the limiting spring 3. When the rotating plug 5 rotates, the limiting spring 3 is driven to twist and deform through the second limiting protrusion 503 to store torque. The limiting spring 3 is a torsion spring. There are multiple first limiting protrusions 502 arranged in a ring at equal intervals. In this embodiment, there are 4, and the positioning force points are evenly distributed, with good positioning effect. An arc portion 5021 is arranged on the top of the first limiting protrusion 502, which facilitates the introduction of the first limiting protrusion 502 into the spiral gap 301, thereby reducing the difficulty of assembly.

[0034] See also Figure 1 , Figure 2 and Figure 4A mounting sleeve 504 is mounted on the outer side of the rotating plug 5, and the limit spring 3 is placed on the inner side of the mounting sleeve 504. The mounting sleeve 504 can limit the deformation of the limit spring, prevent the limit spring from excessively twisting and deforming after being subjected to force, and avoid hitting the inner wall of the rolling shutter tube during use, thereby reducing noise and providing a good user experience; since the first limit protrusion 502 and the third limit protrusion 721 are against the inner side of the mounting sleeve 504, the mounting sleeve 504 is prevented from directly pressing on the limit spring due to gravity, and the protrusion heights of the first limit protrusion 502 and the third limit protrusion 721 are the same.

[0035] See also Figure 2 , Figure 4 , Figure 7 , Figure 8 and Fig.10 , one end of the spring rod 1 away from the positioning member 4 is connected to the limiting mechanism 7, and the side of the limiting mechanism 7 away from the spring rod 1 is connected to a reducer 8 and a positioner 9, and the positioner 9 is used to realize the positioning of the curtain; the reducer 8 is a prior art and is not described in detail here; the limiting mechanism 7 is used to limit the lifting height of the curtain, the limiting mechanism 7 includes a threaded rod 71 and a rotating plug 72 sleeved outside the threaded rod 71, the end of the spring rod 1 away from the positioning member 4 is fixedly connected to the positioner 9, and the positioner 9 includes a fixing sleeve 91 for fixing with the spring rod 1, and the fixing sleeve 91 is provided with a second mounting groove 911, and the second mounting groove 911 is square; the end of the spring rod 1 away from the positioning member 4 is placed in the first mounting groove 401, and the fixing sleeve 91 is provided with a second threaded hole 912, and the second threaded hole 912 is screwed with a second threaded hole 912 for locking the spring rod 1 Two locking bolts, two second locking bolts are relatively arranged, and the locking is more stable; a third limiting protrusion 721 and a fourth limiting protrusion 722 are arranged on the side wall of the rotating plug 72, the limiting spring 3 is spirally shaped and formed with a spiral gap 301, the third limiting protrusion 721 is placed in the spiral gap 301, and a plurality of third limiting protrusions 721 are arranged in a ring with equal intervals. In this embodiment, four third limiting protrusions 721 are arranged; the fourth limiting protrusion 722 is used to limit the end of the limiting spring 3. When the rotating plug 72 rotates, the limiting spring 3 is driven by the fourth limiting protrusion 722 to twist and deform to store torque; the fixed sleeve 91 and the threaded rod 71 are locked by two relative third locking bolts 10, which are easy to assemble and firmly installed; the remaining structures of the limiting mechanism 7 and the positioner 9 are prior art and are not repeated here.

[0036] The utility model provides a spring shutter roller with adjustable preload, wherein the positioning member and the spring rod are fixed by a first locking bolt, and there is no need to drill a hole in the spring rod, so the structural strength of the spring rod will not be weakened, and the spring rod is not easy to break; a first guiding inclined surface is arranged at the notch of the first mounting groove, so that one end of the spring rod is conveniently introduced into the first mounting groove, thereby reducing the difficulty of assembly; a first limiting protrusion is arranged in the spiral gap to position the limiting spring and the rotating plug, and the height of the first limiting protrusion can be adapted to the limiting springs of different wire diameters; a plurality of first limiting protrusions are arranged in annular shapes with equal spacing, and the positioning force points are evenly distributed, so that the positioning effect is good; an arc portion is arranged on the top of the first limiting protrusion, and the arc portion facilitates the first limiting protrusion to be introduced into the spiral gap, thereby reducing the difficulty of assembly; a mounting sleeve is arranged on the outer side of the rotating plug, and the limiting spring is arranged on the inner side of the mounting sleeve, so that the deformation of the limiting spring is limited, so that the limiting spring is prevented from being excessively twisted and deformed after being subjected to force, and is prevented from hitting the inner wall of the shutter tube during use, thereby reducing noise and providing a good user experience.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A spring curtain roller with adjustable preload, comprising a spring rod (1), a rotating disk (2) and a limit spring (3) sleeved on the spring rod (1), one end of the spring rod (1) being detachably connected to a positioning member (4), the positioning member (4) being rotatably connected to a rotating plug (5), characterized in that: The positioning member (4) is fixedly connected to one end of the spring rod (1); a first mounting groove (401) is provided on the positioning member (4); one end of the spring rod (1) is placed in the first mounting groove (401); a first locking bolt (402) is threadedly connected to the positioning member (4) for locking one end of the spring rod (1); a first threaded hole (403) corresponding to the first locking bolt (402) is provided on the positioning member (4); the first locking bolt (402) passes through the first threaded hole (403), and one end of the first locking bolt (402) abuts against the spring rod (1) to fix one end of the spring rod (1) to the positioning member (4).

2. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: The longitudinal section of the spring rod (1) is a regular polygon, and the first mounting groove (401) is adapted to the longitudinal section of the spring rod (1).

3. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: Two first locking bolts (402) are arranged opposite to each other.

4. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: A first inclined guide surface (4011) is provided at the notch of the first installation slot (401).

5. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: A limiting sleeve (404) is arranged between the positioning member (4) and the rotating plug (5); a limiting flange (501) corresponding to the limiting sleeve (404) is arranged on the inner wall of the rotating plug (5); a side end of the limiting sleeve (404) abuts against the limiting flange (501); a through hole (4041) corresponding to the first locking bolt (402) is opened on the limiting sleeve (404); an end of the first locking bolt (402) away from the spring rod (1) is placed in the through hole (4041).

6. The spring shutter roller with adjustable preload as claimed in claim 5, characterized in that: A second guide slope (405) corresponding to the limiting sleeve (404) is provided at the side end of the positioning member (4).

7. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: The rotating plug (5) is connected to the limit spring (3), and a first limit protrusion (502) and a second limit protrusion (503) corresponding to the limit spring (3) are provided on the rotating plug (5); the limit spring (3) is spiral and has a spiral gap (301); the first limit protrusion (502) is placed in the spiral gap (301), and the second limit protrusion (503) is used to abut against the end of the limit spring (3) for limiting.

8. The spring shutter roller with adjustable preload as claimed in claim 7, characterized in that: A plurality of the first limiting protrusions (502) are arranged in an annular manner at equal intervals, and an arc-shaped portion (5021) is arranged at the top of the first limiting protrusion (502).

9. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: A mounting sleeve (504) is sleeved on the outer side of the rotating plug (5), and the limit spring (3) is placed on the inner side of the mounting sleeve (504).

10. The spring shutter roller with adjustable preload as claimed in claim 1, characterized in that: The end of the spring rod (1) away from the positioning member (4) is connected to a limiting mechanism (7), and the side of the limiting mechanism (7) away from the spring rod (1) is connected to a reducer (8) and a positioning device (9); the limiting mechanism (7) is used to limit the lifting height of the curtain, and the limiting mechanism (7) comprises a threaded rod (71) and a rotating plug (72) sleeved outside the threaded rod (71); the end of the spring rod (1) away from the positioning member (4) is fixedly connected to the positioning device (9), and the positioning device (9) comprises a fixing sleeve (91) used for fixing the spring rod (1), and a second mounting groove (911) is provided on the fixing sleeve (91). The end of the spring rod (1) away from the positioning member (4) is placed in the first installation groove (401), and the fixing sleeve (91) is provided with a second threaded hole (912), and a second locking bolt for locking the spring rod (1) is screwed into the second threaded hole (912); a third limiting protrusion (721) and a fourth limiting protrusion (722) are provided on the side wall of the rotating plug (72), the limiting spring (3) is spiral and forms a spiral gap (301), the third limiting protrusion (721) is placed in the spiral gap (301), and the fourth limiting protrusion (722) is used to abut against the end of the limiting spring (3) for limiting.

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