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CN-224228593-U - Rolling shutter spring non-return structure

CN224228593UCN 224228593 UCN224228593 UCN 224228593UCN-224228593-U

Abstract

The utility model relates to the field of roller blinds, in particular to a roller blind spring non-return structure, which comprises a roller, wherein a female crown is arranged at the end part of the roller, a male crown is rotatably arranged on the female crown, a central shaft is rotatably arranged on the roller, a torsion spring for driving the roller to rotate and reset is arranged on the central shaft, the end part of the central shaft penetrates through the male crown and protrudes out of the roller, the male crown and the central shaft are circumferentially fixed, a limiting groove is arranged on the male crown, a non-return pulling piece capable of rotating and then being clamped into the limiting groove to circumferentially fix the male crown and the female crown is rotatably arranged on the female crown, the male crown protrudes out of the female crown, the outer periphery of the male crown is inwards sunken to form the limiting groove, the non-return pulling piece comprises a positioning ring, a screw penetrating through the positioning ring and being spirally arranged on the female crown is arranged on the positioning ring, an outwards extending clamping plate is arranged on the positioning ring, and the end part of the clamping plate is clamped in the limiting groove. The rolling shutter spring non-return structure has remarkable non-return effect, and can effectively solve the problem that the rolling elasticity is too large or too small when the rolling shutter is rewound.

Inventors

  • CAO SHIQIANG
  • ZHAO PENG
  • LIU JISEN
  • JIA TIANHAO

Assignees

  • 山东玉马遮阳科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250526

Claims (10)

  1. 1. The utility model provides a rolling slats spring non-return structure, includes reel (10), its characterized in that, female crown (3) are installed to the tip of reel (10), and public crown (2) are installed in female crown (3) rotation, and center pin (1) are installed in reel (10) rotation, install torsion spring (5) that are used for driving reel (10) gyration reset on center pin (1), and the tip of center pin (1) passes public crown (2) and stretches out reel (10), and public crown (2) are fixed with center pin (1) circumference, are equipped with spacing groove (7) on public crown (2), and limit groove (4) that can block into spacing groove (7) make public crown (2) and female crown (3) circumference fixed after rotating on female crown (3).
  2. 2. The rolling shutter spring non-return structure according to claim 1, wherein the male crown (2) protrudes out of the female crown (3), and the outer periphery of the male crown (2) is recessed inward to form a limiting groove (7).
  3. 3. A shutter spring backstop structure according to claim 1, wherein the backstop pulling sheet (4) comprises a positioning ring (12), and a screw (9) penetrating the positioning ring (12) and screwed on the female crown (3) is mounted on the backstop pulling sheet (4).
  4. 4. A roller shutter spring backstop structure according to claim 3, wherein the positioning ring (12) is provided with a clamping plate (11) extending outwards, and the end part of the clamping plate (11) is clamped in the limiting groove (7).
  5. 5. The rolling shutter spring non-return structure according to claim 4, wherein the end of the clamping plate (11) is provided with a limiting plate (17), and the limiting plate (17) extends along the depth direction of the limiting groove (7).
  6. 6. A shutter spring backstop according to claim 3, wherein said positioning ring (12) is provided with an outwardly extending finger grip (8).
  7. 7. The rolling shutter spring non-return structure according to claim 1, wherein the driving wheel (6) is fixedly installed in the winding drum (10), one end of the torsion spring (5) is fixedly connected with the driving wheel (6), and the other end of the torsion spring (5) is fixedly connected with the central shaft (1).
  8. 8. A roller shutter spring non-return structure according to claim 7, characterized in that the male crown (2) is provided with a positioning hole (13), and the male crown (2) is provided with a bolt (14) which passes through the positioning hole (13) and is screwed on the central shaft (1).
  9. 9. A roller shutter spring backstop structure according to claim 8, wherein the end of the torsion spring (5) connected with the central shaft (1) extends into the upper side of the positioning hole (13), and the bolt (14) is pressed against the end of the torsion spring (5).
  10. 10. The rolling shutter spring non-return structure according to claim 8, wherein the male crown (2) and the female crown (3) are installed at one end of the winding drum (10), the other end of the winding drum (10) is provided with a tail plug (15), and the tail plug (15) is provided with a rotating shaft (16).

Description

Rolling shutter spring non-return structure Technical Field The utility model relates to the field of roller blinds, in particular to a roller blind spring non-return structure. Background The swing arm roller shutter is widely applied to places such as street retail stores, restaurants, coffee shops, markets and supermarkets, the curtain cloth is wound on the winding drum by installing the swing arm roller shutter on a window on one side of the outdoor, the purpose of sunshade is achieved after the curtain cloth is opened, the spring arranged in the swing arm roller shutter is a core component of the curtain cloth capable of being wound automatically, when the curtain cloth is pulled, the spring is compressed for energy storage, and when the curtain cloth is released, the winding drum is driven to rotate, so that the automatic winding of the curtain cloth is achieved. However, during the installation or maintenance process, if the initial elastic force of the torsion spring is set improperly, or after the fatigue failure of the spring, the rolling shutter can not be rolled up normally or the rolling speed is too fast, which affects the normal use. In the face of such a situation, the traditional operation mode needs to detach the whole winding drum to adjust the pretightening force of the built-in torsion spring, so that the operation is complex, the efficiency is low, and the improvement is needed. Disclosure of utility model The utility model aims to provide a rolling shutter spring non-return structure with convenient spring elasticity adjustment. The utility model discloses a rolling shutter spring non-return structure which comprises a winding drum and is structurally characterized in that a female crown is arranged at the end part of the winding drum, a male crown is rotatably arranged on the female crown, a central shaft is rotatably arranged on the winding drum, a torsion spring for driving the winding drum to rotate and reset is arranged on the central shaft, the end part of the central shaft penetrates through the male crown and protrudes out of the winding drum, the male crown is circumferentially fixed with the central shaft, a limit groove is formed in the male crown, and a non-return plectrum capable of rotating and then being clamped into the limit groove to circumferentially fix the male crown and the female crown is rotatably arranged on the female crown. When the non-return plectrum is not blocked into the spacing groove, center pin and reel can rotate relatively, rotate the compression elasticity that the reel can adjust the torsional spring this moment, in the spacing groove is blocked into to the non-return plectrum again to the torsional spring adjustment in place, and center pin and reel can not rotate relatively this moment, and the rolling screen can normally the rolling, and the device simple structure, non-return effect are showing, can effectively solve the rolling screen and roll up when rewinding, the too big or too little problem of rolling elasticity. The male crown protrudes out of the female crown, and the outer periphery of the male crown is recessed inwards to form a limit groove. The limiting groove is positioned on the outer contour of the male crown, so that the pulling piece can be conveniently guided to be clamped in, the structure can be simplified, and a clear clamping position can be provided. The non-return plectrum comprises a positioning ring, and a screw penetrating through the positioning ring and screwed on the female crown is arranged on the non-return plectrum. The screw can also be replaced by a rivet, and the positioning ring can rotate to allow the plectrum to rotate around the screw to realize clamping into or separating from the limit groove. The locating ring is provided with an outwardly extending clamping plate, and the end part of the clamping plate is clamped in the limiting groove. The clamping plate can swing along with the rotation of the positioning ring, so that the clamping plate is clamped into or separated from the limiting groove. The tip of cardboard is equipped with the limiting plate, and the limiting plate extends along the depth direction of spacing groove. The limiting plate can increase the contact area of the limiting groove in the depth direction, so that the non-return shifting plate and the limiting groove are matched more firmly and reliably. The positioning ring is provided with an outwards extending shifting handle, the shifting handle is outwards extended to facilitate manual operation, and when the non-return shifting piece is rotated, the shifting handle is held by hand without tools. The reel is fixedly provided with a driving wheel, one end of the torsion spring is fixedly connected with the driving wheel, and the other end of the torsion spring is fixedly connected with the central shaft. The torque of the torsion spring is transmitted to the winding drum through the driving wheel, and the driving wheel is directly l