CN110043180B - Torsion preloading device, torsion preloading roller shutter and torsion preloading method - Google Patents

Abstract

The invention belongs to the technical field of household articles, and particularly relates to a torsion preloading device capable of preloading torsion of a torsion spring of a spring roller shutter, the torsion preloading roller shutter and a torsion preloading method. The torsion preloading device comprises an outer cylinder and a preloading mechanism, wherein the preloading mechanism comprises an inner rod, a clutch piece, a transmission piece and an elastic element, the elastic element is arranged between the transmission piece and the outer cylinder so that a second tooth part of the inner rod and a third tooth part of the transmission piece are respectively close to or far away from a first tooth part of the inner rod, the second tooth part is close to or far away from the first tooth part to form an engagement state or a separation state, and the transmission piece is close to or far away from the first tooth part to form the engagement state or the separation state with the third tooth part. The torsion preloading device can protect the torsion spring during transportation and storage, can easily carry out torsion preloading during installation and can automatically maintain the torsion preloading device in the state, and the torsion preloading device is very convenient to use.

Description

Torsion preloading device, torsion preloading roller shutter and torsion preloading method

Technical Field

The invention belongs to the technical field of household articles, and particularly relates to a torsion preloading device capable of preloading torsion of a torsion spring of a spring roller shutter, the torsion preloading roller shutter and a torsion preloading method.

Background

The rolling curtain is one of window decoration products, has the characteristics of attractive appearance, simplicity, clean and clean falling, spaciousness, simplicity and the like, mainly comprises various types of electric rolling curtains, bead-pulling rolling curtains, spring rolling curtains and the like, is widely applicable to places such as business office buildings, hotels, restaurants, offices, houses (serving as a screen curtain) and the like, and is particularly applicable to office scenes of large-area glass curtain walls. When the rolling curtain fabric is put down, indoor light can be soft, direct sunlight is prevented from being puzzled, a good sun-shading effect is achieved, and when the rolling curtain is lifted up, the volume of the rolling curtain fabric is small, so that the rolling curtain fabric is not easy to detect.

Spring roller blinds are named because of the built-in spring devices (torsion springs) in the tubes, and are also called semi-automatic roller blinds, and can be divided into a plurality of subdivision types such as traditional pull rope type spring roller blinds, bead-pulling type spring roller blinds, one-control two-type spring roller blinds, booster spring roller blinds and the like according to different operating systems.

For spring roller blinds, no matter how the operating system is, the torsion spring needs to be preloaded during production or installation, i.e. the roller blind after installation has a certain energy storage in the initial situation, so that the use function of the spring can meet the requirements. In the prior art, the loading of the torsion spring is generally divided into two modes, one is completed before delivery, so that the torsion spring can generate loss in the transportation and sales storage processes, and the consistency of the product performance is not facilitated; the other is not loaded before leaving the factory but loaded during installation, and the installation and loading process is very inconvenient, and the condition is maintained and the bracket is fixed after manual loading.

Here, in the prior art, no matter which loading mode is adopted, the energy storage of the torsion spring can not be or is inconvenient to adjust along with the extension of the service time after installation, the loading before delivery is generally adjustable (unless the structure is disassembled), the loading is reset after the disassembly when the loading is carried out, and the loading and the installation operation need to be repeated for reuse, so that the method is very inconvenient for products.

Disclosure of Invention

The invention aims to solve at least one of the problems and provides a torsion preloading device, a torsion preloading roller shutter and a torsion preloading method of the roller shutter.

As a first aspect of the present invention, there is provided a torsion preload device comprising an outer barrel which is hollow internally to form a cavity, and a preload mechanism disposed at least partially in the cavity.

The preload mechanism comprises an inner rod, a clutch piece, a transmission piece and an elastic element, wherein the outer end of the inner rod is connected with a main torsion spring to be preloaded. The inner rod comprises a first tooth part, the clutch part comprises a second tooth part, the transmission part comprises a third tooth part and a first transmission part, a second transmission part matched with the first transmission part is arranged on the inner wall of the outer cylinder, and the second tooth part and the third tooth part are matched with the first tooth part.

The elastic element is arranged between the transmission piece and the outer cylinder so that the second tooth part and the third tooth part can respectively approach or separate from the first tooth part, and therefore the second tooth part approaches or separates from the first tooth part to form an engagement state or a separation state, and the transmission piece approaches or separates from the first tooth part to form the engagement state or the separation state of the third tooth part and the first tooth part. Obviously, for the clutch and the transmission, the clutch and the transmission have two switchable states (namely an engaged state and a disengaged state), and the states of the two states are always opposite, when the clutch is in the engaged state, the transmission is in the disengaged state, and when the clutch is in the disengaged state, the transmission is correspondingly in the engaged state; and when the clutch member is in the engaged state, the clutch member can drive the inner rod to rotate relative to the outer cylinder so as to carry out torsion preloading on the main torsion spring, and when the transmission member is in the engaged state, the rotation of the inner rod and the outer cylinder is locked, and the torsion preloading of the main torsion spring is fixed.

In use, the outer barrel of the torsion preloading device is connected to the winding drum of the roller shutter, and the outer end of the inner rod is directly or indirectly connected to the main torsion spring (or other mechanism to be loaded) to be preloaded; the inner rod and the outer cylinder are in a locking state and a separating state, the inner rod and the outer cylinder rotate together in the locking state, the inner rod can rotate relative to the outer cylinder in the separating state, and two ends of the main torsion spring can be respectively connected with the inner rod and the outer cylinder directly or indirectly, so that the inner rod can rotate relative to the outer cylinder to pre-load the torsion force of the main torsion spring.

Specifically, in the initial condition, under the action of the elastic element, the third tooth portion is engaged with the first tooth portion, and the second tooth portion is separated from the first tooth portion, at this time, the inner rod is connected with the outer cylinder via the transmission member to be interlocked, and both ends of the main torsion spring are respectively connected to the inner rod and the outer cylinder at this time, and whether the main torsion spring has a preload force (i.e., whether the main torsion spring deforms or not) is locked by the inner rod and the outer cylinder. Applying a force to cause the clutch member to approach the inner rod so that the second tooth portion is engaged with the first tooth portion to form an engaged state, and simultaneously the third tooth portion of the transmission member is separated from the first tooth portion to form a separated state, wherein the clutch member can drive the inner rod to rotate relative to the outer barrel so as to perform torsion pre-load on the main torsion spring, and the inner rod is rotated for a plurality of angles (namely, rotated for a plurality of circles) until torsion pre-load is completed; after torsion preloading is completed, the external force is removed, the clutch piece is far away from the inner rod, so that the second tooth part is separated from the first tooth part, the third tooth part of the transmission piece is engaged with the first tooth part, and the inner rod and the outer cylinder are connected together through the transmission piece to fix the preload force of the main torsion spring. Of course, in one of the ways described above, it is also possible to directly exchange the component states in the initial situation and in the operating situation.

Preferably, the clutch member includes a clutch portion, the clutch portion may be in a hollow ring shape, an outer wall of the clutch portion is formed as an outer wall, and an inner cavity is formed as an inner cavity, the second tooth portion is disposed on the inner wall of the clutch portion, so that the first tooth portion is accommodated in the inner cavity and cooperates with the second tooth portion after the clutch member approaches to the inner rod, and the outer wall is configured to be freely rotatable in the outer cylinder (i.e., the outer wall thereof is smooth and has no other limiting mechanism). Besides the hollow ring, it may also be an eccentrically arranged plate or block structure, which may also be seen as a section in the hollow ring; the outer wall and the inner lumen are understood to be the outer side and the inner side.

Preferably, the transmission member may also have a hollow circular ring shape, the third tooth portion being disposed on an inner wall thereof and the first transmission portion being disposed on an outer wall thereof. Similarly, the transmission member may be a part of the hollow circular ring after cutting, so long as the third tooth portion and the first transmission portion on the inner side and the outer side of the transmission member can be ensured to be respectively matched with the first tooth portion and the second transmission portion.

Preferably, the first, second and third teeth each comprise a plurality of tooth blocks, and the second and third teeth are each configured to mate/mesh with the first teeth to drive the inner rod to rotate within the outer barrel, respectively. Preferably, the first tooth part is an external gear or a rack arranged on the outer surface of the internal rod, and the second tooth part and the third tooth part are internal gears or racks arranged on the corresponding inner cavity walls of the clutch part or the transmission part. Although the general technical description is made here by using a gear/rack, it is obvious that the first, second and third tooth portions do not necessarily need to be entirely covered with the corresponding inner and outer surfaces, and only a partial region may be provided to achieve the technical effect, or the uncovered portion may be omitted.

More preferably, the first tooth portion is an internal gear, and the second tooth portion and the third tooth portion are external gears.

Preferably, the first transmission part and the second transmission part are respectively ribs and grooves, and the ribs and the grooves are matched with each other, so that the transmission part can translate in the outer cylinder but cannot rotate, and the outer cylinder and the inner rod can be in two states (namely an engaged state and a separated state) which are also capable of being separated and combined. It should be noted that, for the first transmission portion and the second transmission portion, the grooves are not fixed, but the ribs are not fixed.

Preferably, the clutch member further includes an adjusting portion, and the adjusting portion has a shape of a straight line, a cross, a rectangle, a flower, or other non-circular shapes to realize the function of driving the clutch member to rotate. The adjusting part is used for forming a universal or special adjusting structure for adjusting and matching with an adjusting device to adjust the preload force; the special adjusting device can avoid unnecessary product damage caused by self-adjustment of a user. Furthermore, the adjustment part may also be formed as an additional separate tool.

Preferably, the transmission member further includes a limiting ring disposed outside the transmission member and engaged with the first tooth portion, so as to limit the transmission member and prevent excessive movement of the transmission member (i.e. make the displacement of the transmission member not exceed the first tooth portion), which can be achieved by setting parameters such as length and elasticity of the elastic element, but the limiting ring is a preferred choice.

Preferably, the elastic element is a spring. More preferably, the elastic element further comprises a spring fixing seat, wherein the spring fixing seat is arranged at least one end part of the spring, and the abrasion of the spring to the outer cylinder and the transmission piece is reduced, and the resistance is reduced; meanwhile, the spring fixing seat can be used as an alternative loss piece or made of wear-resistant materials independently.

Preferably, the clutch piece further comprises a connecting rod and a connecting rod seat, and the outer diameter of the connecting rod seat is larger than that of the connecting rod; meanwhile, a rod cavity is arranged in the inner rod, the rod cavity comprises a first rod cavity and a second rod cavity, and the inner diameter of the first rod cavity is smaller than that of the second rod cavity; the connecting rod is arranged in the first rod cavity, and the connecting rod seat is arranged in the second rod cavity and is connected with the front end of the connecting rod. So that the clutch member and the inner rod are formed integrally and both have a movable space for the clutch member to operate. If the transmission piece with the limiting ring is matched, a torsion preloading device with stable use and complete structure can be formed.

Further, the torsion preloading device may further include a torsion spring fixing seat for connecting the main torsion spring, and the torsion spring fixing seat is connected with the front end of the inner rod, for example, fixedly connected by a screw fixing manner.

Preferably, the outer cylinder further comprises a movable part for arranging the clutch part, and the movable part can be a smooth inner wall, so that the outer wall of the clutch part can freely rotate in the outer cylinder.

The utility model provides a torsion preload roller shutter, includes reel, roller shutter cloth, pivot mechanism, torsional spring mechanism and torsion preload mechanism, pivot mechanism and torsion preload mechanism divide to locate the reel both ends so that it can the forward and reverse rotation, and roller shutter cloth one end is connected in the reel surface in order to wind or to unwind and realize the roller shutter function.

The torsion preloading mechanism adopts any torsion preloading device; the rotating shaft mechanism comprises an inner shaft and a rotary drum sleeved on the inner shaft, two ends of the rotary drum are fixedly connected with the rotary drum and the outer drum respectively, the clutch piece of the inner shaft and the torsion preloading mechanism is used for integrally fixing the roller shutter, and the clutch piece of the inner shaft and the torsion preloading mechanism are connected with the first roller shutter support and the second roller shutter support respectively to fix the roller shutter.

A cavity is arranged at one side of the winding drum, which is close to the torsion preloading device, and the torsion spring mechanism is arranged in the cavity; the torsion spring mechanism comprises a torsion spring and a torsion spring movable seat, one end of the torsion spring is connected with the inner rod, and the other end of the torsion spring is connected with the torsion spring movable seat; the torsion spring movable seat is configured to translate along the inner wall of the cavity but not rotate.

The torsion spring movable seat can translate (namely move in the extending direction of the winding drum) in the cavity relative to the winding drum but cannot rotate, and the rotation of the torsion spring movable seat is controlled by the winding drum, that is, when the winding drum rotates, the torsion spring correspondingly deforms to generate deformation force or release the stored deformation force; correspondingly, the torsion spring can be lengthened or shortened when deformed, and the torsion spring movable seat can translate along the cavity, so that the torsion spring can work normally. The other end of the torsion spring is fixed on the inner rod or the torsion spring fixing seat, and the extension or shortening caused by all deformation of the torsion spring is ensured by the translation of the torsion spring movable seat.

Preferably, the movable seat of the torsion spring and the inner wall of the cavity are respectively provided with a rib and a groove, so that the movable seat of the torsion spring can translate along the inner wall of the cavity but cannot rotate. Similarly, the movable seat of the torsion spring and the inner wall of the cavity are not fixed, and the movable seat of the torsion spring is the prismatic strip and the groove is the groove.

Preferably, the torsion spring mechanism further comprises a torsion spring fixing seat, the torsion spring fixing seat is connected with the inner rod, and the torsion spring is fixedly arranged on the torsion spring fixing seat, namely, the torsion spring is connected with the inner rod through the torsion spring fixing seat.

More preferably, the torsion spring mechanism further comprises a torsion spring supporting cylinder, one end of the torsion spring supporting cylinder is fixedly connected to the torsion spring fixing seat to be fixed, and meanwhile, the torsion spring and the torsion spring movable seat are sleeved outside the torsion spring supporting cylinder and can move along the extending direction of the torsion spring supporting cylinder.

Preferably, the torsion preloading device further comprises a fixed connecting piece, wherein the inner end of the fixed connecting piece is provided with a connecting seat matched with the adjusting part of the clutch piece, and the connecting seat is also in a shape of a straight line, a cross, a rectangle, a flower and other non-circular shapes; the fixed connection is secured to the first roller shade bracket such that the end of the roller tube is secured by the torsional preload device.

More preferably, the roller shutter further comprises a lower frame bar which is matched below the roller shutter cloth to increase the counterweight so that the roller shutter cloth keeps sagging.

Preferably, the roller shutter further comprises a damping mechanism, wherein the damping mechanism is used for replacing the rotating shaft mechanism, and has a damping function capable of being adjusted in a self-adaptive manner besides the basic function of the rotating shaft mechanism.

The damping mechanism comprises an outer rotary drum, a damping torsion spring, a movable piece and an inner shaft, a threaded part is arranged on the inner shaft, a threaded hole is formed in the movable piece, and the threaded hole is matched with the threaded part so that the movable piece can be screwed in or screwed out along the inner shaft; the inner shaft is at least partially arranged in the outer rotary drum, and two ends of the damping torsion spring are respectively matched with the inner wall of the inner shaft and the movable piece. The outer rotating cylinder is fixedly connected to the winding drum so that the outer rotating cylinder can rotate along with the winding drum, the movable piece is configured to translate in the cavity of the outer rotating cylinder but not rotate, and the inner shaft is fixedly connected to the second roller shutter bracket, so that the movable piece is driven to screw in or screw out on the threaded part of the inner shaft when the winding drum rotates, and the damping torsion spring is compressed or stretched to play a damping effect.

Preferably, the movable piece outer wall and the cavity inner wall are respectively provided with a rib and a groove, so that the movable piece can translate along the cavity inner wall of the outer rotary cylinder but cannot rotate. Likewise, the ribs are not fixed to the outer wall of the movable member and the inner wall of the cavity.

Preferably, the damping mechanism further comprises a spring seat fitted at least one end of the damping torsion spring.

Preferably, the inner end of the inner shaft penetrates through the outer rotary cylinder and then is fixed through a clamp spring, so that the damping mechanism is assembled into an independent whole.

Preferably, the damping mechanism further comprises a clamping mechanism, wherein the clamping mechanism comprises a clamping seat and a clamping piece; the clamping seat comprises a rectangular clamping groove, the clamping piece comprises a connecting piece and a clamping connector, a clamping hole is formed in the outer end of the inner shaft, the clamping connector is matched with the clamping hole, the connecting piece is matched in the clamping groove, and the clamping seat is fixedly connected with the second roller shutter support.

Preferably, the connecting piece is made of elastic materials and is provided with a locking piece, the second roller shutter support is provided with a locking hole, and the locking piece is matched with the locking hole.

Preferably, the cavity is arranged in the winding drum in a penetrating way.

Further, the ribs or grooves are penetratingly arranged on the inner wall of the cavity, and grooves or ribs are correspondingly arranged on the outer walls of the outer drum and the outer drum.

The torsion preloading method suitable for the main torsion spring of the roller shutter comprises the following steps:

the torsion preloading device is configured to include an outer barrel that is hollow inside to form a cavity, and a preloading mechanism that is at least partially disposed in the cavity.

The preload mechanism is configured to include an inner rod, a clutch member, a transmission member, and an elastic member, with the outer end of the inner rod being connected to a main torsion spring to be preloaded. The inner rod comprises a first tooth part, the clutch part comprises a second tooth part, the transmission part comprises a third tooth part and a first transmission part, a second transmission part matched with the first transmission part is arranged on the inner wall of the outer cylinder, and the second tooth part and the third tooth part are matched with the first tooth part.

The elastic element is arranged between the transmission piece and the outer cylinder so that the second tooth part and the third tooth part can respectively approach or separate from the first tooth part, thereby enabling the second tooth part to approach or separate from the first tooth part to form an engagement state or a separation state, and enabling the transmission piece to approach or separate from the first tooth part to enable the third tooth part to form an engagement state or a separation state with the first tooth part. Obviously, for the clutch and the transmission, the clutch and the transmission have two switchable states (namely an engaged state and a disengaged state), and the states of the two states are always opposite, when the clutch is in the engaged state, the transmission is in the disengaged state, and when the clutch is in the disengaged state, the transmission is correspondingly in the engaged state; and when the clutch member is in the engaged state, the clutch member can drive the inner rod to rotate relative to the outer cylinder so as to carry out torsion preloading on the main torsion spring, and when the transmission member is in the engaged state, the rotation of the inner rod and the outer cylinder is locked, and the torsion preloading of the main torsion spring is fixed.

In use, the outer barrel of the torsion preloading device is connected to the winding drum of the rolling shutter, and the outer end of the inner rod is directly or indirectly connected to the main torsion spring to be preloaded; the inner rod and the outer cylinder are in a locking state and a separating state, the inner rod and the outer cylinder rotate together in the locking state, the inner rod can rotate relative to the outer cylinder in the separating state, and two ends of the main torsion spring can be respectively connected with the inner rod and the outer cylinder directly or indirectly, so that the inner rod can rotate relative to the outer cylinder to pre-load the torsion force of the main torsion spring.

Specifically, in the initial condition, under the action of the elastic element, the third tooth portion is engaged with the first tooth portion, and the second tooth portion is separated from the first tooth portion, at this time, the inner rod is connected with the outer cylinder via the transmission member to be interlocked, and both ends of the main torsion spring are respectively connected to the inner rod and the outer cylinder at this time, and whether the main torsion spring has a preload force (i.e., whether the main torsion spring deforms or not) is locked by the inner rod and the outer cylinder. Applying a force to cause the clutch member to approach the inner rod so that the second tooth portion is engaged with the first tooth portion to form an engaged state, and simultaneously the third tooth portion of the transmission member is separated from the first tooth portion to form a separated state, wherein the clutch member can drive the inner rod to rotate relative to the outer barrel so as to perform torsion pre-load on the main torsion spring, and the inner rod is rotated for a plurality of angles (namely, rotated for a plurality of circles) until torsion pre-load is completed; after torsion preloading is completed, the external force is removed, the clutch piece is far away from the inner rod, so that the second tooth part is separated from the first tooth part, the third tooth part of the transmission piece is engaged with the first tooth part, and the inner rod and the outer cylinder are connected together through the transmission piece to fix the preload force of the main torsion spring.

Preferably, the clutch member further comprises a clutch part, the clutch part can be a hollow circular ring, the second tooth part is arranged on the inner wall of the clutch part, the first tooth part is accommodated in the inner cavity after the clutch member approaches to the inner rod, and the outer wall is configured to be capable of freely rotating in the outer cylinder (namely, the outer wall of the clutch member is smooth and has no other limiting mechanism). Besides the hollow ring, it may also be an eccentrically arranged plate or block structure, which may also be seen as a section in the hollow ring; the outer wall and the inner lumen are understood to be the outer side and the inner side.

Preferably, the transmission member is configured to have a hollow circular ring shape, the third tooth portion is disposed on an inner wall thereof, and the first transmission portion is disposed on an outer wall thereof. Similarly, the transmission member may be a part of the hollow circular ring after cutting, so long as the third tooth portion and the first transmission portion on the inner side and the outer side of the transmission member can be ensured to be respectively matched with the first tooth portion and the second transmission portion.

Preferably, the first, second and third teeth are configured such that they each comprise a plurality of tooth blocks, and the second and third teeth are each configured to mate/mesh with the first teeth to drive rotation of the inner rod within the outer barrel, respectively. Preferably, the first tooth part is an external gear or a rack arranged on the outer surface of the internal rod, and the second tooth part and the third tooth part are internal gears or racks arranged on the corresponding inner cavity walls of the clutch part or the transmission part. Although the general technical description is made here by using a gear/rack, it is obvious that the first, second and third tooth portions do not necessarily need to be entirely covered with the corresponding inner and outer surfaces, and only a partial region may be provided to achieve the technical effect, or the uncovered portion may be omitted.

More preferably, the first tooth part is an internal gear, and the second tooth part and the third tooth part are external gears.

Preferably, the first transmission part and the second transmission part are respectively provided with ribs and grooves, and the ribs and the grooves are matched with each other, so that the transmission part can translate in the outer cylinder but cannot rotate, and the outer cylinder and the inner rod can be in two states (namely an engaged state and a separated state) which can be engaged and disengaged. It should be noted that, for the first transmission portion and the second transmission portion, the grooves are not fixed, but the ribs are not fixed.

Preferably, the clutch member further comprises an adjusting part, and the adjusting part is in a shape of a straight line, a cross, a rectangle, a flower and other non-circular shapes so as to realize the function of driving the clutch member to rotate. The adjusting part is used for forming a universal or special adjusting structure for adjusting and matching with an adjusting device to adjust the preload force; the special adjusting device can avoid unnecessary product damage caused by self-adjustment of a user.

Preferably, the transmission member further comprises a limiting ring, wherein the limiting ring is arranged on the outer side of the transmission member and matched with the first tooth part so as to limit the transmission member and prevent the transmission member from excessive movement (namely, the displacement of the transmission member does not exceed the first tooth part), and the transmission member can be realized through setting parameters such as the length, the elasticity and the like of the elastic element, but the limiting ring is a preferable choice.

Preferably, the elastic element is a spring. More preferably, the elastic element is configured to further comprise a spring fixing seat, wherein the spring fixing seat is arranged at least one end part of the spring, and the abrasion of the spring to the outer cylinder and the transmission piece is reduced and the resistance is reduced; meanwhile, the spring fixing seat can be used as an alternative loss piece or made of wear-resistant materials independently.

Preferably, the clutch part comprises a connecting rod and a connecting rod seat, and the outer diameter of the connecting rod seat is larger than that of the connecting rod; meanwhile, a rod cavity is arranged in the inner rod, the rod cavity comprises a first rod cavity and a second rod cavity, and the inner diameter of the first rod cavity is smaller than that of the second rod cavity; the connecting rod is arranged in the first rod cavity, and the connecting rod seat is arranged in the second rod cavity and is connected with the front end of the connecting rod. So that the clutch member and the inner rod are formed integrally and both have a movable space for the clutch member to operate. If the transmission piece with the limiting ring is matched, a torsion preloading device with stable use and complete structure can be formed.

Further, the torsion preloading device comprises a torsion spring fixing seat for connecting the main torsion spring, and the torsion spring fixing seat is connected with the front end of the inner rod and fixedly connected with the front end of the inner rod in a screw fixing mode.

Preferably, the outer cylinder comprises a movable part for the clutch part to be arranged, and the movable part can be a smooth inner wall.

The torsion preloading method described above is applied to a roller blind and the roller blind is further configured such that it comprises a damping mechanism (for the roller blind it of course also comprises other necessary structures or configuration methods, which are known in the art, reference being made in part to the torsion preloading device described above or to the torsion preloading roller blind).

Preferably, the damping mechanism comprises an outer rotary drum, a damping torsion spring, a movable piece and an inner shaft, wherein a threaded part is arranged on the inner shaft, a threaded hole is arranged on the movable piece, and the threaded hole is matched with the threaded part so that the movable piece can be screwed in or screwed out along the inner shaft; the inner shaft is at least partially arranged in the outer rotary drum, and two ends of the damping torsion spring are respectively matched with the inner wall of the inner shaft and the movable piece. The outer rotating cylinder is fixedly connected to the winding drum so that the outer rotating cylinder can rotate along with the winding drum, the movable piece is configured to translate in the cavity of the outer rotating cylinder but not rotate, and the inner shaft is fixedly connected to the second roller shutter bracket, so that the movable piece is driven to screw in or screw out on the threaded part of the inner shaft when the winding drum rotates, and the damping torsion spring is compressed or stretched to play a damping effect.

Preferably, the movable part is further provided with ribs and grooves on the outer wall of the movable part and the inner wall of the cavity, so that the movable part can translate along the inner wall of the cavity of the outer rotary cylinder but cannot rotate. Likewise, the ribs are not fixed to the outer wall of the movable member and the inner wall of the cavity.

Preferably, the damping mechanism is configured to further comprise a spring seat fitted at least one end of the damping torsion spring.

Preferably, the inner end of the inner shaft is arranged to penetrate through the outer rotary cylinder and then fixed through the clamping spring, so that the damping mechanism is assembled into an independent whole.

Preferably, the damping mechanism is configured to further comprise a clamping mechanism, and the clamping mechanism comprises a clamping seat and a clamping piece; the clamping seat comprises a rectangular clamping groove, the clamping piece comprises a connecting piece and a clamping connector, a clamping hole is formed in the outer end of the inner shaft, the clamping connector is matched with the clamping hole, the connecting piece is matched in the clamping groove, and the clamping seat is fixedly connected with the second roller shutter support.

Preferably, the connecting piece is made of elastic materials and is provided with a locking piece, the second roller shutter support is provided with a locking hole, and the locking piece is matched with the locking hole.

Preferably, the cavity is configured to be disposed through the drum.

Further, the device also comprises ribs or grooves which are arranged on the inner wall of the cavity in a penetrating way, and grooves or ribs are correspondingly arranged on the outer walls of the outer drum and the outer drum.

The torsion preloading device can be widely applied to various devices which comprise a spring roller shutter and need torsion preloading of the torsion spring, and the torsion preloading device is convenient to use. The torsion spring is unloaded (i.e. has no deformation) after leaving the factory, so that the torsion spring cannot be adversely affected by vibration in the transportation process and the extension of the storage time, and the inner rod and the outer cylinder are locked at the moment, so that the torsion spring can be protected; applying an acting force to the clutch member at any time in the installation process so as to enable the clutch member to approach to the inner rod, so that the second tooth part is engaged with the first tooth part to form an engaged state, and simultaneously, the third tooth part of the transmission member is separated from the first tooth part to form a separated state, at the moment, the clutch member can drive the inner rod to rotate relative to the outer cylinder so as to pre-load the main torsion spring in torsion, and the inner rod is rotated for a plurality of angles (namely, rotated for a plurality of circles) until the torsion pre-load is completed; after torsion preloading is completed, the external force is removed, the clutch piece is far away from the inner rod, so that the second tooth part is separated from the first tooth part, the third tooth part of the transmission piece is jointed with the first tooth part, the inner rod and the outer cylinder are connected together through the transmission piece to fix the preload force of the main torsion spring, and the clutch piece can be kept in the state by itself, so that the clutch piece is quite convenient.

The torsion preload roller shutter of the invention adopts the torsion preload device, so the torsion preload roller shutter of the invention has the advantages correspondingly; meanwhile, the roller shutter also comprises a damping mechanism which can synchronously deform along with the deformation storage of the main torsion spring in the use process of the roller shutter and feed back the deformation in the form of friction force, so that corresponding damping force can be provided according to the current restoring force of the main torsion spring when the roller shutter is restored, and the stable and reliable roller shutter recovery process is ensured.

The torsion preloading method of the invention relies on the torsion preloading device or the torsion preloading roller shutter, thereby having corresponding advantages.

Drawings

FIG. 1 is a schematic view of a torsion preload device in accordance with an embodiment of the present invention;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

FIG. 3a is a schematic view of the outer barrel of the embodiment of FIG. 1;

FIG. 3b is a cross-sectional view of FIG. 3 a;

FIG. 4 is a schematic view of the overall structure of the preloading organ of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the clutch engagement structure of the embodiment of FIG. 1;

FIG. 6 is a schematic exploded view of the clutch, inner lever, transmission and spring of the embodiment of FIG. 1;

FIG. 7 is a schematic diagram of the transmission of the embodiment of FIG. 1;

FIG. 8a is a cross-sectional view of the embodiment of FIG. 1 in an engaged condition of the torsional preload device, i.e., a cross-sectional view of the drive member engaged with the inner rod;

FIG. 8b is a cross-sectional view of the embodiment of FIG. 1 in a disengaged condition of the torsional preload device, i.e., a cross-sectional view of the clutch member engaged with the inner rod;

FIG. 9a is a cross-sectional view of the inner rod;

FIG. 9b is a cross-sectional view of the clutch member;

FIG. 9c is a cross-sectional view of the engagement of the inner lever with the clutch member in response to the disengaged condition of FIG. 8 b;

FIG. 9d is a second cross-sectional view of the engagement of the inner lever with the clutch member, corresponding to the engaged condition of FIG. 8 a;

FIG. 10 is a schematic diagram illustrating the cooperation between the torsion preload device and the torsion spring holder of the embodiment of FIG. 1

FIG. 11 is a schematic view of the overall structure of a roller blind according to another embodiment of the present invention;

FIG. 12 is an exploded view of the embodiment of FIG. 11, with omitted drawings;

FIG. 13a is an enlarged schematic view of a portion of the embodiment of FIG. 11;

FIG. 13b is a schematic enlarged view of a portion of the embodiment of FIG. 11;

FIG. 14 is a schematic view of the construction of one end of the spool of the embodiment of FIG. 11;

FIG. 15 is a schematic exploded view of the torsion spring mechanism and the torsion preload mechanism of the embodiment of FIG. 11;

FIG. 16 is a schematic view of the torsion spring seat of the embodiment of FIG. 11;

FIG. 17 is a schematic view of the overall structure of a damping mechanism according to other embodiments of the present invention;

FIG. 18 is an exploded view of the embodiment of FIG. 17;

FIG. 19 is a cross-sectional view of the embodiment of FIG. 17;

FIG. 20 is a schematic view of the structure of the outer drum of the embodiment of FIG. 17;

FIG. 21 is a schematic view of the movable member structure of the embodiment of FIG. 17;

FIG. 22 is a schematic view of the inner shaft structure of the embodiment of FIG. 17;

fig. 23 is an exploded view of the damper mechanism of the embodiment of fig. 17 mated with a second roller shade bracket.

Detailed Description

The invention will be described in detail below with respect to certain specific embodiments thereof in order to better understand the invention and thereby to more clearly define the scope of the invention as claimed. It should be noted that the following description is only some embodiments of the inventive concept and is only a part of examples of the present invention, wherein the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the implementation scope of the present invention. Conventional selections and substitutions made by those skilled in the art under the guidance of the inventive concept should be considered as being within the scope of the claimed invention.

As shown in fig. 1-10, a torsion preloading device is composed of an outer cylinder 110 and a preloading mechanism 101 arranged in the outer cylinder, wherein the outer cylinder 110 is in a cylindrical shape, a round table shape or a shape formed by splicing a plurality of cylindrical shapes and round tables, the inner part of the outer cylinder 110 is hollow to form a cavity 111, and the preloading mechanism 101 is at least partially arranged in the cavity 111; preferably, the preload mechanism 101 is fully accommodated in the cavity 111 except for the necessary connection portions at both ends; the preload mechanism 101 is configured to be rotatable with respect to the outer cylinder 110 or rotatable together with the outer cylinder after being fixed thereto (the movement modes of both are also rotation except for the necessary functions described below).

Fig. 1 and 2 show a schematic perspective view and a schematic fully exploded view of a torsion preload device (i.e., a torsion preload mechanism 100) in a preferred embodiment, fig. 3ab shows a schematic perspective view and a cross-sectional view of an outer cylinder 110, respectively, and fig. 4 shows a schematic overall structure of a preload mechanism 101.

In this embodiment, the preloading organ 101 further comprises an inner rod 120, a clutch member 130, a transmission member 140 and an elastic element 150, wherein the outer end 121 of the inner rod 120 is connected (either directly or indirectly) with a main torsion spring to be preloaded. Preferably, the outer cylinder 110 includes a first port 114 and a second port 115, and the outer end 121 of the inner rod 120 passes through the second port 115 for the main torsion spring to be connected thereto, and one end of the elastic member 150 is fitted on the inner wall of the second port 115.

In use, the outer barrel 110 of the torsion preloading device (i.e., the torsion preloading mechanism 100) is connected to the roller tube of the roller blind (although other scenarios or devices are contemplated in which torsion springs are used as in roller blinds and require preloading of their torsion force), the inner rod 120 and the outer barrel 110 have a locked state in which they rotate together, and a separated state in which the inner rod 120 can rotate relative to the outer barrel 110, and the ends of the primary torsion spring can be directly or indirectly connected to the inner rod 120 and the outer barrel 110, respectively, such that the inner rod 120 can rotate relative to the outer barrel 110 to thereby torsionally preload the primary torsion spring.

For two states of the inner rod 120 and the outer cylinder 110, which can be engaged and disengaged, a certain preferred embodiment of the present invention is realized by adopting the following structure:

the inner rod 120 is provided with a first tooth part 122, the clutch member 130 is provided with a second tooth part 131, the transmission member 140 is provided with a third tooth part 141 and a first transmission part 142, the inner wall of the outer cylinder 110 is provided with a second transmission part 112 and a movable part 113, and the second transmission part 112 is matched with the first transmission part 142; the first tooth 122, the second tooth 131 and the third tooth 141 each comprise a number of tooth blocks, and the second tooth 131 and the third tooth 141 are each configured to mate/mesh with the first tooth 122. Preferably, the first tooth 122 is an external gear or a rack disposed on the outer surface of the inner rod 120, the second tooth 131 and the third tooth 141 are internal gears or racks disposed on the corresponding inner cavity walls of the clutch member 130 or the driving member 140, and although the general technical description is made here by using gears/racks, it is obvious that the tooth blocks of the first tooth 122, the second tooth 131 and the third tooth 141 do not necessarily need to entirely cover the corresponding inner and outer surfaces, and only some areas may be disposed to achieve the technical effect.

Also, the elastic member 150 is preferably a spring that is disposed between the driver 140 and the outer cylinder 110 such that the second tooth portion 131 and the third tooth portion 141 can be moved toward or away from each other with respect to the first tooth portion 122, thereby moving the second tooth portion 131 toward or away from each other with respect to the first tooth portion 122 to form an engaged state or a disengaged state, and the driver 140 moves toward or away from each other with respect to the first tooth portion 122 to form an engaged state or a disengaged state with respect to the third tooth portion 141. That is, in the initial state, the third tooth portion 141 is engaged with the first tooth portion 122 due to the elastic force of the elastic member 150, and at this time, the second tooth portion 131 is separated from the first tooth portion 122, and the spring deforms after the application of the force, so that the second tooth portion 131 is engaged with the first tooth portion 122, and the third tooth portion 141 is separated from the first tooth portion 122 accordingly. More preferably, the elastic element 150 further includes a spring fixing base 151, the spring fixing base 151 is disposed at least one end of the spring, and reduces abrasion of the spring to the outer cylinder 110 and the transmission member 140 and reduces resistance; meanwhile, the spring holder 151 may be used as an alternative wear member or made of wear-resistant material alone.

Specifically, initially, the third tooth portion 141 is engaged with the first tooth portion 122 and the second tooth portion 131 is separated from the first tooth portion 122 by the elastic member 150, and at this time, the inner rod 120 is coupled with the outer cylinder 110 via the transmission member 140, and both ends of the main torsion spring are respectively coupled to the inner rod 120 and the outer cylinder 110 at this time, regardless of whether the main torsion spring has a preload (i.e., whether it is deformed) or not, which is locked by the inner rod 120 and the outer cylinder 110. Applying a force to approach the clutch member 130 relative to the inner rod 120 so that the second tooth 131 is engaged with the first tooth 122 to form an engaged state, and simultaneously the third tooth 141 of the transmission member 140 is separated from the first tooth 122 to form a separated state, at this time, the clutch member 130 can drive the inner rod 120 to rotate relative to the outer cylinder 110 so as to perform torsion pre-load on the main torsion spring, and the inner rod 120 is rotated by a plurality of angles (i.e. a plurality of rotations) until torsion pre-load is completed; after the torsion preloading is completed, the external force is removed, the clutch member 130 is far away from the inner rod 120 so that the second tooth 131 is separated from the first tooth 122, the third tooth 141 of the transmission member 140 is engaged with the first tooth 122, and the inner rod 120 and the outer cylinder 110 are connected together through the transmission member 140 to fix the preload force of the main torsion spring. More preferably, the driving member 140 further includes a limiting ring 143, where the limiting ring 143 is disposed outside the driving member 140 and cooperates with the first tooth 122 to limit the driving member 140 from excessive movement (i.e. making its displacement not exceed the first tooth 122).

In one embodiment, the clutch member 130 is provided with a clutch portion 132, the clutch portion 132 is a hollow ring and is fitted in the movable portion 113, the outer wall of the clutch portion 132 is formed as an outer wall 1321 and the inner cavity is formed as an inner cavity 1322, the second tooth portion 131 is disposed on the inner wall of the clutch portion 132, so that the clutch member 130 is accommodated in the inner cavity 1322 after being close to the inner rod 120, the outer wall 1321 is configured to freely rotate in the outer cylinder 110 (i.e. the outer wall thereof is smooth without other limiting mechanisms), for example, in one preferred embodiment, the movable portion 113 is a smooth inner wall.

In other embodiments, the transmission member 140 has a hollow ring shape, the third tooth portion 141 is disposed on an inner wall thereof and the first transmission portion 142 is disposed on an outer wall thereof; more preferably, the first transmission portion 142 and the second transmission portion 112 are respectively ribs and grooves, and are mutually matched, for example, fig. 3 and 4 show a matching manner that the outer wall of the first transmission portion 142 is provided with grooves and the inner wall of the second transmission portion 112 is provided with ribs, and fig. 20 and 21 show opposite arrangement manners (although fig. 20 and 21 are directed to the damping mechanism, part of structures thereof are also applicable to the torsion preloading device).

In other embodiments, the clutch 130 further comprises a connecting rod 133 and a connecting rod seat 1331, wherein the connecting rod seat 1331 has an outer diameter larger than the connecting rod 133; meanwhile, a rod cavity 123 is arranged in the inner rod 120, the rod cavity 123 comprises a first rod cavity 1231 and a second rod cavity 1232, and the inner diameter of the first rod cavity 1231 is smaller than that of the second rod cavity 1232; the connecting rod 133 is disposed in the first rod cavity 1231, and the connecting rod seat 1331 is disposed in the second rod cavity 1232 and connected to the front end of the connecting rod 133. So that the clutch 130 and the inner rod 120 are formed integrally and both have a movable space for the clutch 130 to operate. More preferably, the clutch member 130 further includes an adjusting portion 135, and the adjusting portion 135 has a shape of a straight line, a cross, a rectangle, a flower, or other non-circular shape to realize the function of driving the clutch member 130 to rotate (fig. 1, 2, and 4 show the adjusting portion 135 in a straight line).

In some practical embodiments, the torsion preloading device further includes a torsion spring fixing seat 170, which is used for the torsion spring 241 to be disposed, and is connected to the outer end 121 of the inner rod 120, for example, fixedly connected by a screw fixing manner.

The torsion preload roller shutter comprises a roller 210, a roller shutter 220, a rotating shaft mechanism 230, a torsion spring mechanism 240 and a torsion preload mechanism 100, wherein the rotating shaft mechanism 230 and the torsion preload mechanism 100 are respectively arranged at two ends of the roller 210 so that the roller shutter can rotate positively and negatively, and one end of the roller shutter 220 is connected to the surface of the roller 210 to be wound or unwound to realize the roller shutter function; more preferably, the roll screen further includes a lower frame bar 221, and the lower frame bar 221 is fitted under the roll screen cloth 220 to add a weight so that the roll screen cloth 220 keeps sagging.

The torsion preloading mechanism is the torsion preloading device according to any of the above embodiments;

the rotating shaft mechanism 230 comprises an inner shaft 232 and a drum 231 sleeved on the inner shaft 232, two ends of the drum 210 are respectively and fixedly connected with the drum 231 and the outer drum 110, the inner shaft 232 and the clutch member 130 of the torsion preload mechanism 100 are used for integrally fixing the roller shutter, and the inner shaft 232 and the clutch member 130 are respectively connected with the first roller shutter bracket 251 and the second roller shutter bracket 252 to fix the roller shutter.

A cavity 211 is arranged at one side of the winding drum 210 close to the torsion preloading device (namely the torsion preloading mechanism 100), and a torsion spring mechanism 240 is arranged in the cavity 211; more preferably, the interior of the spool 210 is hollow, and a cavity 211 is disposed therethrough.

The torsion spring mechanism 240 comprises a torsion spring 241 and a torsion spring movable seat 242, wherein one end of the torsion spring 241 is connected with the inner rod 120, and the other end is connected with the torsion spring movable seat 242; the torsion spring movable seat 242 is configured to translate along the inner wall of the cavity 211 but not rotate. More preferably, the torsion spring mechanism 240 further includes a torsion spring fixing base 243, the torsion spring fixing base 243 is connected with the inner rod 120, and the torsion spring 241 is fixedly disposed on the torsion spring fixing base 243 (i.e. the torsion spring 241 is connected with the inner rod 120 via the torsion spring fixing base 243); optimally, the torsion spring mechanism 240 further includes a torsion spring supporting cylinder 244, one end of the torsion spring supporting cylinder 244 is fixedly connected to the torsion spring fixing seat 243 for fixing, and simultaneously, the torsion spring 241 and the torsion spring movable seat 242 are both sleeved outside the torsion spring supporting cylinder 244 and can move along the extending direction thereof.

In some embodiments, ribs 212 and grooves 213 are provided on the torsion spring movable base 242 and the inner wall of the cavity 211, respectively, so that the torsion spring movable base 242 can translate along the inner wall of the cavity 211 but cannot rotate. The torsion spring movable seat 242 is translatable (i.e., movable in the direction of extension of the spool 210) relative to the spool 210 within the cavity 211 but is not rotatable, the rotation of which is controlled by the spool 210, i.e., when the spool 210 rotates, the torsion spring 241 deforms accordingly to generate a deformation force or to apply a stored deformation force; accordingly, the torsion spring 241 may be stretched or shortened when deformed, and the torsion spring movable seat 242 may translate along the cavity 211, so that the torsion spring 241 may work normally. The other end of the torsion spring 241 is fixed to the inner rod 120 or the torsion spring fixing seat 243, which is unchanged in any case, and the extension or shortening caused by all the deformation of the torsion spring 241 is ensured by the translation of the torsion spring movable seat 242.

In other embodiments, the torsion preloading device (i.e. the torsion preloading mechanism 100) further includes a fixed connecting piece 134, wherein a connecting seat 1341 matched with the adjusting portion 135 of the clutch 130 is provided at the inner end of the fixed connecting piece 134, and the connecting seat 1341 is also in a shape of a straight line, a cross, a rectangle, a flower, or other non-circular shape; the fixing link 134 is fixedly coupled to the first roll screen bracket 251 such that the end of the roll 210 is passed through a torsion preloading device, i.e., the torsion preloading mechanism 100, and fixed.

In some preferred embodiments, the roller blind further comprises a damping mechanism 300, wherein the damping mechanism 300 replaces the rotating shaft mechanism 230, and has an adaptively adjustable damping function in addition to the basic function of the rotating shaft mechanism 230.

The damping mechanism 300 comprises an outer drum 310, a damping torsion spring 320, a movable member 330 and an inner shaft 340, wherein the inner shaft 340 is provided with a threaded portion 341, the movable member 330 is provided with a threaded hole 331, and the threaded hole 331 is matched with the threaded portion 341 so that the movable member 330 can be screwed in or screwed out along the inner shaft 340; the inner shaft 340 is at least partially disposed in the outer drum 310, and both ends of the damping torsion spring 320 are respectively engaged with the inner wall of the inner shaft 340 and the movable member 330. The outer rotating cylinder 310 is fixedly connected to the winding cylinder 210 so that the outer rotating cylinder can rotate along with the winding cylinder 210, the movable piece 330 is configured to translate in the cavity 311 of the outer rotating cylinder 310 but not rotate, and the inner shaft 340 is fixedly connected to the second roller shutter bracket 252, so that the movable piece 330 is driven to screw in or screw out on the thread part 341 of the inner shaft 340 when the winding cylinder 210 rotates, and the damping torsion spring 320 is compressed or stretched to play an adaptive damping effect; that is, as the roller shutter descends, the torsion spring 241 is loaded to store energy, and simultaneously the damping torsion spring 320 is compressed accordingly, so that the friction of the damping mechanism 300 increases, and thus the energy of the torsion spring 241 can be offset when the roller shutter is restored, so that the restoring speed is more uniform. More preferably, the damping mechanism 300 further includes a spring seat 321, the spring seat 321 being fitted at least one end of the damping torsion spring 320. Preferably, the inner end of the inner shaft 340 is fixed by a snap spring 342 after penetrating the outer cylinder 310, so that the damping mechanism 300 is assembled as a separate unit.

The damping action of the damping mechanism is realized by friction force, and as the roller shutter rises/falls,

in some embodiments, ribs 212 and grooves 213 are provided on the outer wall of the movable member 330 and the inner wall of the cavity 311, respectively, so that the movable member 330 can translate along the inner wall of the cavity 311 of the outer barrel 310 but cannot rotate.

In other embodiments, the damping mechanism 300 further comprises a snap-in mechanism 350, the snap-in mechanism 350 comprising a snap-in seat 351 and a snap-in member 352; the clamping seat 351 comprises a rectangular clamping groove 3511, the clamping piece 352 comprises a connecting piece 3521 and a clamping joint 3522, a clamping hole 3401 is formed in the outer end of the inner shaft 340, the clamping joint 3522 is matched with the clamping hole 3401, the connecting piece 3521 is matched in the clamping groove 3511, and the clamping seat 351 is fixedly connected with the second roller shutter bracket 252. More preferably, the connecting piece 3521 is made of elastic material and is provided with a locking piece 3531, the second roller shutter bracket 252 is provided with a locking hole 3532, and the locking piece 3531 is matched with the locking hole 3532.

The torsion preloading method mainly depends on the torsion preloading device or the torsion preloading roller shutter and is configured according to the structure, the assembly and the use method, so that torsion of the torsion spring can be preloaded, and detailed reference can be made to the torsion preloading device or the torsion preloading roller shutter, and details are not repeated.

Of course, although the above embodiment has the structure that the related components (the first transmission portion 142 and the second transmission portion 112, the torsion spring movable seat 242 and the cavity 211, the cavity 211 and the outer rotary cylinder 310 or the outer cylinder 110) are translatable but not rotatable by the cooperation of the ribs 212 and the grooves 213, those skilled in the art will recognize that other related structures that are known in the art and that can enable the related components to translate but not rotate are also possible.

Claims (8)

1. The torsion preloading device comprises an outer cylinder (110) and a preloading mechanism (101), wherein a cavity (111) is formed in the outer cylinder (110), and the preloading mechanism (101) is at least partially accommodated in the cavity (111); it is characterized in that the method comprises the steps of,

the preloading mechanism (101) comprises an inner rod (120), a clutch piece (130), a transmission piece (140) and an elastic element (150), wherein the outer end (121) of the inner rod (120) is connected with a main torsion spring to be preloaded; the inner rod (120) comprises a first tooth part (122), the clutch piece (130) comprises a second tooth part (131), the transmission piece (140) comprises a third tooth part (141) and a first transmission part (142), a second transmission part (112) matched with the first transmission part (142) is arranged on the inner wall of the outer cylinder (110), and the second tooth part (131) and the third tooth part (141) are matched with the first tooth part (122);

The elastic element (150) is arranged between the transmission piece (140) and the outer cylinder (110) so as to enable the second tooth part (131) and the third tooth part (141) to be close to or far away from each other relative to the first tooth part (122), so that the second tooth part (131) is close to or far away from each other relative to the first tooth part (122) to form an engagement state or a separation state, and the transmission piece (140) is close to or far away from each other relative to the first tooth part (122) to enable the third tooth part (141) to form an engagement state or a separation state with the first tooth part (122);

the clutch member (130) comprises a clutch portion (132), wherein the outer wall of the clutch portion (132) is formed into an outer wall (1321) and the inner cavity is formed into an inner cavity (1322), the second tooth portion (131) is arranged on the inner wall of the clutch portion (132), so that the first tooth portion (122) is accommodated in the inner cavity (1322) and matched with the second tooth portion (131) after the clutch member (130) is close to the inner rod (120), and the outer wall (1321) is configured to be capable of freely rotating relative to the outer cylinder (110);

the transmission part (140) is in a hollow circular ring shape, the third tooth part (141) is arranged on the inner wall of the transmission part, and the first transmission part (142) is arranged on the outer wall of the transmission part.

2. The torsion preloading arrangement of claim 1, wherein the first and second drive portions (142, 112) are cooperating ribs (212) and grooves (213), respectively.

3. The torsion preloading arrangement of claim 1, wherein the clutch (130) further includes an adjustment portion (135), the adjustment portion (135) being in the form of a letter, a rectangle or a flower to drive the clutch (130) in rotation.

4. A torsion preload roller shutter comprises a roller (210), a roller shutter cloth (220), a rotating shaft mechanism (230), a torsion spring mechanism (240) and a torsion preload mechanism (100), wherein one end of the roller shutter cloth (220) is connected to the surface of the roller (210) to be wound or unwound; it is characterized in that the method comprises the steps of,

the torsion preload mechanism (100) is a torsion preload device as set forth in any one of claims 1-3;

the rotating shaft mechanism (230) comprises an inner shaft (232) and a rotary drum (231) sleeved on the inner shaft (232), two ends of the rotary drum (210) are respectively fixedly connected with the rotary drum (231) and the outer drum (110), and a clutch piece (130) and the inner shaft (232) of the torsion preloading mechanism (100) are respectively connected with a first roller shutter bracket (251) and a second roller shutter bracket (252) to fix a roller shutter;

a cavity (211) is arranged at one side of the winding drum (210) close to the torsion preloading mechanism (100), and a torsion spring mechanism (240) is arranged in the cavity (211); the torsion spring mechanism (240) comprises a torsion spring (241) and a torsion spring movable seat (242), one end of the torsion spring (241) is connected with the inner rod (120), and the other end of the torsion spring (241) is connected with the torsion spring movable seat (242); the torsion spring movable seat (242) is configured to translate along the inner wall of the cavity (211) but not rotate.

5. The torsion preloaded rolling shutter of claim 4, wherein the torsion spring movable seat (242) and the inner wall of the cavity (211) are respectively provided with ribs (212) and grooves (213), so that the torsion spring movable seat (242) can translate along the inner wall of the cavity (211) but cannot rotate.

6. The torsional preloaded roller shutter of claim 4, further comprising a damping mechanism (300), the damping mechanism (300) replacing the spindle mechanism (230);

the damping mechanism (300) comprises an outer rotary drum (310), a damping torsion spring (320), a movable piece (330) and an inner shaft (340), wherein a threaded part (341) is arranged on the inner shaft (340), a threaded hole (331) is arranged on the movable piece (330), and the threaded hole (331) is matched with the threaded part (341) so that the movable piece (330) can be screwed in or screwed out along the inner shaft (340); the inner shaft (340) is at least partially arranged in the outer rotary cylinder (310), and two ends of the damping torsion spring (320) are respectively matched with the inner wall of the inner shaft (340) and the movable piece (330);

the outer rotating cylinder (310) is fixedly connected to the winding drum (210) so that the outer rotating cylinder can rotate together with the winding drum, the movable piece (330) is configured to translate in the cavity (311) of the outer rotating cylinder (310) but not rotate, the inner shaft (340) is fixedly connected to the second roller shutter bracket (252), and accordingly the movable piece (330) is driven to rotate on the threaded part (341) of the inner shaft (340) when the winding drum (210) rotates, and the damping torsion spring (320) is compressed or stretched to play a damping effect.

7. A torsion preloading method, comprising:

the torsion preloading device is configured to comprise an outer cylinder (110) and a preloading mechanism (101), a cavity (111) is formed in the outer cylinder (110), and the preloading mechanism (101) is at least partially accommodated in the cavity (111);

configuring the preload mechanism (101) to include an inner lever (120), a clutch member (130), a transmission member (140) and an elastic member (150), an outer end (121) of the inner lever (120) to which a main torsion spring to be preloaded is connected; the inner rod (120) comprises a first tooth part (122), the clutch piece (130) comprises a second tooth part (131), the transmission piece (140) comprises a third tooth part (141) and a first transmission part (142), a second transmission part (112) matched with the first transmission part (142) is arranged on the inner wall of the outer cylinder (110), and the second tooth part (131) and the third tooth part (141) are matched with the first tooth part (122);

the elastic element (150) is arranged between the transmission piece (140) and the outer cylinder (110) so as to enable the second tooth part (131) and the third tooth part (141) to be close to or far away from each other relative to the first tooth part (122), so that the second tooth part (131) is close to or far away from each other relative to the first tooth part (122) to form an engagement state or a separation state, and the transmission piece (140) is close to or far away from each other relative to the first tooth part (122) to enable the third tooth part (141) to form an engagement state or a separation state with the first tooth part (122);

Wherein the clutch member (130) comprises a clutch portion (132), the outer wall of the clutch portion (132) is formed into an outer wall (1321) and the inner cavity is formed into an inner cavity (1322), the second tooth portion (131) is arranged on the inner wall of the clutch portion (132), so that the first tooth portion (122) is accommodated in the inner cavity (1322) and matched with the second tooth portion (131) after the clutch member (130) is close to the inner rod (120), and the outer wall (1321) is configured to be capable of freely rotating relative to the outer cylinder (110);

the transmission part (140) is in a hollow circular ring shape, the third tooth part (141) is arranged on the inner wall of the transmission part, and the first transmission part (142) is arranged on the outer wall of the transmission part.

8. The torsion preloading method according to claim 7, wherein the clutch (130) further includes an adjustment portion (135), the adjustment portion (135) having a straight, cross, rectangular or flower shape to drive the clutch (130) to rotate.