CN204163602U - Formula groups of shades falls in resistance - Google Patents

Abstract

The utility model relates to a kind of resistance and falls formula groups of shades, and it includes: a upper purlin, and inner longitudinal space is provided with a volume and puts element; One feedback device, it is interaction relation that working end and above-mentioned volume put elements combination; One group of stay cord, upper end winding is combined in above-mentioned volume and puts element, and a heavy curtain is crossed in figure break-through, and lower end is in conjunction with a lower purlin; One group of damping unit, is arranged in upper purlin inside, is provided with a pedestal, is positioned at the outlet position that volume puts element, and pedestal combination has a damping wheel, and the wheel face of damping wheel provides stay cord to coil through figure.The utility model is that one belongs to omnidistance with the operation of hand limb, and change the groups of shades that heavy curtain opens setting-out state, it has the feature of the brand-new design of impedance heavy curtain downslide.

Description

Formula groups of shades falls in resistance

Technical field

The utility model relates to a kind of resistance and falls formula groups of shades.

Background technology

Tradition is relevant causes the groups of shades design of relying on oneself and reclaiming heavy curtain, early stage for being provided with at work axial line the limiter that acts on the locking of flexible member counteragent, limiter is utilized unidirectionally to engage, to avoid flexible member feedback force direct start volume to put element and pull-up heavy curtain, the lower purlin of heavy curtain all can be obtained only fixed at arbitrary horizontal level height.

It is above-mentioned for tradition utilization is at the large-scale system endeavoured among recovery groups of shades, recently small-sized groups of shades 1 (as shown in Figure 1) is, the lift of its heavy curtain about 100 is the altitude range that user's hand end can touch up and down, on accept the bottom that the operation of putting all uses manual operation heavy curtain 100, if make it the change obtaining the state of putting, because this simplify its structure design, coexist the mutually inside of upper purlin 10 of this structure comprises a feedback device 2 and a volume puts element 11, volume is put element 11 same volume and is put and to pierce into heavy curtain 100 after stay cord 12 and in conjunction with the lower purlin 13 of lower end, wherein be provided with balancing weight 14 in the inside of lower purlin 13, the quality counterweight of balancing weight 14 is in the flexible member 20 of feedback device 2, the elastic strain curve of flexible member 20 is drawn materials again compared with the torque curve moved towards in level, therefore the stress that after flexible member 20 is subject to rolling up the interlock of putting element 11, its any deformation stage occurs is comparatively close, it must be the use utilizing the special selection of this flexible member 20 and the counterweight of balancing weight 14 then to exempt limiter 15.

Internal system is provided with a feedback device 2, element 11 is put via a guide 21 volume that links, entirety loaded by upper purlin 10, feedback device 2 is provided with the flexible member 20 of a constant voltage, it is two-way linkage that this flexible member 20 and volume are put between element 11, volume is put element 11 and roll up again and put a stay cord 12, and after the figure of stay cord 12 passes heavy curtain 100, its end is provided with the lower purlin 13 of balancing weight 14 in conjunction with an inside.

When heavy curtain 100 will be transferred, user operates drop-down lower purlin 13 with hand limb, namely pulled down pulls stay cord 12 simultaneously, and then bring up volume and put element 11 and rotate, volume puts strength that element 11 rotates the flexible member 20 of reverse input feedback device 2 inside can form the elastic energy storage of a preparation feedback, and after letting go, the strength fed back occurs elastic energy storage element 20 at once, and one breaks through lower purlin 13 and can not glide again, it two againsts the quality of balancing weight 14 for this feedback force, and can not by heavy curtain 100 backrush.

Utilize the feedback energy storage of feedback device 2 and the Action of Gravity Field of balancing weight 14, pray and make lower purlin 13 set by heavy curtain 100 bottom can determine arbitrary height in stroke as far as possible, but in fact, reagency cannot omnidistance contend with the quality that heavy curtain 100 changes at arbitrary height, its reason is that heavy curtain 100 is for having population value amount, especially the horizontal curtain sheet of multiple-piece or the groups of shades of door curtain made of cloth shape, this heavy curtain 100 top edge is for being combined in upper purlin 10, when transferring comprehensively, the pulling force loading of stay cord 12 is then because the weight of top curtain sheet or heavy curtain is arranged rear the lightest by disperseing up and down, up pushed away if lower purlin 13 is progressive, on it, namely table sequentially amasss repeatedly curtain sheet, then because of the amount storehouse of curtain sheet, its weight stow is sequentially increased, so the tensile load of stay cord 12 is also the heaviest along with being increased to, therefore the difference of the horizontal high and low position in lower purlin 13 place, stay cord 12 bear to any transfer height heavy curtain 100 draw load with lotus neither with, so adopt the constant compression elastic element 20 of certain pressure value, also cannot in response to heavy curtain 100 be placed down in arbitrary height prevent glide or the contending with of upper volume.

In order to overcome the problems referred to above, common practices is draw materials to the feedback force of this flexible member 20, choice for use can meet the flexible member 20 that heavy curtain 100 adds balancing weight 14 overall weight weight bearing power completely in advance, make the heavy curtain 100 up whole time receiving, can load completely, lower purlin 13 can be determined in highest level position, after transferring, the lower purlin 13 of heavy curtain 100 can be determined at arbitrary height.

During actual use, because the feedback force of feedback device 2 at least will close to the lower purlin 13 that contend with by maximum weight during up rolling, add the overall weight of balancing weight 14, so feedback energy load capacity is very large, but after heavy curtain 100 is put completely, the load that the lift load of stay cord 12 is equal to feedback energy is the lightest, add the air flow power of percolation window window, also heavy curtain 100 momentum can be changed, therefore after the heavy curtain 100 of common this kind of groups of shades 1 is transferred, can by up rollback, or half-open heavy curtain 100 bottom can fall down, its reason is in the quiescent state, although flexible member 20 is adjustable for contending with balancing weight 14, but get involved by underrange external force, namely the phenomenon that its scope of contending with effect occurs is exceeded.

Flexible member 20 and contending with of balancing weight 14 configure in addition, the performance of part is adopted to need high-precision requirement, and precision during assembling adjusts hyperphoric operation, but the air-flow blast naturally through window is without definite value, make this lower purlin 13 after air-flow is worn and attacked heavy curtain 100, produce mechanical seismic wave and to be multiplied centrifugal force mass action and heavy curtain 100 is usually glided or backrush.

Summary of the invention

The purpose of this utility model is to provide a kind of resistance to fall formula groups of shades, and it can stop heavy curtain to glide, and the work capacity burden that volume is put when element reclaims only acts on by the stay cord of emptying, and makes the feedback device of system can lightweight.

The utility model is achieved in that formula groups of shades falls in a kind of resistance, and it includes: a upper purlin, and inner longitudinal space is provided with a volume and puts element; One feedback device, it is interaction relation that working end and above-mentioned volume put elements combination; One group of stay cord, upper end winding is combined in above-mentioned volume and puts element, and a heavy curtain is crossed in figure break-through, and lower end is in conjunction with a lower purlin; One group of damping unit, is arranged in upper purlin inside, is provided with a pedestal, is positioned at the outlet position that volume puts element, and pedestal combination has a damping wheel, and the wheel face of damping wheel provides stay cord to coil through figure.Wherein damping wheel is that the unidirectional above-mentioned stay cord of restriction that act as is lowered, but its damping strength is less than the operation force of hand limb.

The central axis axis direction of described damping wheel, puts the outlet wiring direction of element for vertical with volume.

Described damping wheel is two, and level left and right relative combinations is in the side of pedestal, and two central axiss are parallel.

Described damping wheel is two, and relative combinations is in the side of pedestal vertically, and two central axiss are parallel.

Described damping wheel is two, is located at the both sides of pedestal respectively, and two central axiss are parallel, and the central axis of one damping wheel is combined in a slide block, and slide block can make upper and lower displacement modulation by the chute set by pedestal by a bolt modulation.

Described damping wheel is for producing damping by a check mechanism effect, and this check mechanism is by a tension spring, and one end is limited by pedestal, and the other end opens the apparent surface being pressed on damping wheel.

Pull pressure ring and be compressed on the opposing end surface of damping wheel in one end one of described tension spring, one end is resisted at pedestal, and central axis pivot set by damping wheel is through damping wheel, and the other end is coaxially combined with an adjusting lever, the length of adjusting lever modulation tension spring through changing device, enters to change damped coefficient.

Described volume is put between element and feedback device, is connected to a speed change gear.

Described speed change gear is planetary gearsets.

Described speed change gear is the working speed lowering feedback device.

Described damping wheel supported by a modified gear, can make upper and lower shifting movement, is subject to a braking parts and brakes during decline.

Described modified gear is refute by one the fork being connected to pedestal, and in fork working end in conjunction with damping wheel, the below of damping wheel is met and is provided with a braking parts.

The other end of the contrary damping wheel of described fork, is provided with a balancing weight.

The utility model is applied to the hand limb direct control heavy curtain bottom, changes the groups of shades of its folding and unfolding state, which provides a kind of brand-new design that effectively can prevent downslide to heavy curtain.

Accompanying drawing explanation

Fig. 1 is that tradition has counterweight to resist the groups of shades schematic diagram of feedback device.

Fig. 2 is the schematic diagram that the utility model groups of shades is provided with damping unit.

Fig. 3 is the effect generation schematic diagram that stay cord interfered by the utility model damping unit.

Fig. 4 is the schematic diagram for emptying between the upper end of the utility model stay cord and damping unit.

Fig. 5 is that the utility model is provided with level mutually to the schematic diagram of damping wheel.

Fig. 6 is the utility model vertically mutual schematic diagram to being provided with damping wheel.

Fig. 7 is between the utility model two damping wheels, and one can modulation horizontal angle position schematic diagram corresponding thereto.

Fig. 8 is that the utility model gets involved the lateral view making generation damping action via check mechanism.

Fig. 9 is that the utility model reaches auxiliary brake mechanism figure via modified gear.

Figure 10 is that the utility model reaches braking back work schematic diagram via modified gear.

Symbol description:

Groups of shades 1 upper purlin 10 heavy curtain 100

Volume puts element 11 stay cord 12 lower purlin 13

Limiter 15 balancing weight 14 feedback device 2

Flexible member 20 guide 21 speed change gear 200

Damping unit 3 central axis 301 damping wheel 30

Pedestal 31 changing device 32 wheel face 300

Bolt 321 chute 310 check mechanism 4

Tension spring 41 adjusting lever 42 varying element 43

Pull pressure ring 44 lower pulling force F1 holdback force F2

Election power F3 furls power F4 and restraints pressure F0

Slide block 322 modified gear 5 fork 51

Central axis 301 balancing weight 53 fulcrum 52

Spacing pillow 54 braking parts 6 braking surface 61

Pedestal 31

Detailed description of the invention

Relevant detailed construction of the present utility model and operating principle, please show that cooperation is consulted subsequent figures and is described as follows by Fig. 2, first refer to shown in Fig. 2, groups of shades 1 of the present utility model is to provide a kind of design that effectively can prevent downslide to heavy curtain 100, the outlet position of element 11 is put at volume, between be equipped with one group of damping unit 3, damping unit 3 be the power that restriction is glided, and then the lower purlin 13 of stable heavy curtain 100 can be determined in arbitrary level height position.

Identical in system have a upper purlin 10 to be provided with a feedback device 2, feedback device 2 is provided with flexible member 20 and puts element 11 via a guide 21 and volume and form two-way linkage relation, flexible member 20 is wherein the characteristic of a constant voltage, the external surface putting element 11 at volume is coiled after being coiling overdamp device 3 in stay cord 12 upper end, after heavy curtain 100 worn by stay cord 12 line, lower end is combined in lower purlin 13, above-mentioned volume puts element 11 because light weight work, between itself and flexible member 20, can between be connected to speed change gear 200 just like planetary gearsets, to change the rotating ratio that volume puts element 11 and flexible member 20, wherein speed change gear 200 does to slow down to flexible member 20, also therefore the deformation rate of flexible member 20 also can reduce.

Being embodied as of above-mentioned damping unit 3 is multiple, reach the effect of damping with the working method of damping wheel 30 through citing, its detailed head please coordinate shown in Fig. 3, diagram to be walked around the contact of 270 degree to damping wheel 30 in order to simplify the figure only indicating stay cord 12, namely the active force of another lower pulling force heavy curtain 100 pulls the lower purlin 13 pulled down strength of heavy curtain 100, this strength to resist the damping force of damping wheel 30, the wheel face 300 friction retardance of damping wheel 30 can be subject to by stay cord 12, or the damping wheel 30 appearance bind (shenglvehao)together effect that tool damping rotates forms annular beam pressure, the downslide of stay cord 12 can be prevented, allow heavy curtain 100 maintenance determine can not glide.

Set damping unit 3 is combined in upper purlin 10 correspondence puts element 11 leading-out terminal position at volume, according to its outlet direction, stay cord 12 can be modulation with the alternate angle position of damping wheel 30, as being illustrated as the turnover of an angle of 90 degrees, stay cord 12 coils the wheel face 300 of the damping wheel 30 set by overdamp device 3, damping wheel 30 is central axis 301 and be combined in pedestal 31 set by its center, for determining at pedestal 31 between damping wheel 30 and central axis 301, or by between damping wheel 30 and central axis 301, be set as the damping of a rotation, the strength of this damping is for being greater than heavy curtain 100 overall weight, add the strength of wind-force start heavy curtain 100.

Its application state is gravity or the air flow power of working as heavy curtain 100, when heavy curtain 100 can be made to glide, because this decline external force is not enough to resist this damping force, passive and drop-down stay cord 12 produces tensile force f 1, and stay cord 12 coil overdamp wheel 30 wheel face wheel face 300 namely produce a branch of pressure F0 heavy curtain 100 and formed bundle close, this lower pulling force F1 is not enough to pull damping wheel 30, in the non-rotary situation of damping wheel 30, then lower pulling force heavy curtain 100 cannot be down, the other end has the strength of a holdback force F2 heavy curtain 100 hereat, this holdback force F2 puts element 11 in the wheel face 300 point of contact length of damping wheel 30 by volume, reversal interlocking relay by holdback force F2 occurred, the strength of holdback force F2 heavy curtain 100 maintains stay cord 12 to contact wheel face 300 and can produce joint movement, and namely its Shu Heli of lower pulling force heavy curtain 100 pulled down is produced by the line body of stay cord 12 and the contact surface of wheel face 300, if more powerful bundle closes, then stay cord 12 can enclose the bundle conjunction effect namely obtaining consolidation by coiling damping wheel 30 liang, if above-mentioned damping wheel 30 and central axis 301 consubstantiality are determined at pedestal 31, then utilize the wheel face 300 of damping wheel 30 for stay cord 12 coil after, produce mutual frictional force, this frictional force then can be converted as damping force, this frictional force is greater than heavy curtain 100 oeverall quality, be less than hand limb operating physical force.

When we will transfer heavy curtain 100, then utilize the drop-down lower purlin 13 of hand limb, pulling force through stay cord 12 indirectly damping unit 3 volume that links put element 11, when damping unit 3 position, due to the drop-down strong of hand limb, powerful bundle pressure F0 is there is and acts on damping wheel 30 in the lower pulling force F1 produced via the counter of holdback force F2, also resist overdamp simultaneously and take turns 30 predetermined damping powers, namely band turns damping wheel 30 and rotates, stay cord 12 is made to be lowered and to drive aforementioned heavy curtain 100 to transfer, even if damping wheel 30 is for being fixed, but the strength of hand limb is to resist the frictional force of stay cord 12 and wheel face 300, reach identical above-mentioned operation needs.

Shown in Fig. 4, in time will reclaiming heavy curtain 100 and obtain, we use hand limb that lower purlin 13 up will be elected generation one and elect power F3, then namely the line body of stay cord 12 disappears to lower purlin 13 pulling force as the aforementioned, and make between stay cord 12 and the damping wheel set by damping unit 3 30, for the state of the emptying that gets loose, this action is that we push boom 13 when up regaining, stay cord 12 because of the friction namely losing contact between intervention its line body and wheel face 300 of damping wheel 30 of electing power heavy curtain 100 be emptying pattern, this emptying pattern is subject to again the strength backrush of a retracting power F4 heavy curtain 100 at once, the strength of this retracting power F4 heavy curtain 100 occurred by feedback device 2, its damping state irrelevant between damping wheel 30 and central axis 301 hereat, this time damping wheel 30 can be static do not need rotate, what utilize election power heavy curtain 100 up pushes away support, namely the wheel face 300 allowing the line body of stay cord 12 depart from damping wheel 30 becomes emptying shape, the cylindrical table of element 11 is put in retracting power F4 heavy curtain 100 backrush that the free line segment of this emptying shape is subject to the feedback device 2 of system around the home at volume, therefore volume put element 11 reclaims volume structure energy load only in reclaim by the stay cord 12 of emptying, the feedback device 2 of system like this can adopt the design of lightweight.

Shown in Fig. 5, damping unit 3 of the present utility model is combined in upper purlin 10, pedestal 31 set by damping unit 3 is provided with two damping wheels 30 via central axis 301 level belonging to difference mutually to fixing, and set stay cord 12 can be wrapped over wherein after a damping wheel 30 again inverted plate walk around a damping wheel 30, unrolling of wiring formation 8 font, this unrolls and namely produces properer Shu Heli to two damping wheels 30, one of them damping wheel 30 can be set to freewheel, or two all have a damping, this kind of level design can use the heavy curtain 100 being weight to use.

Shown in Fig. 6, the identical curtain in order to be applied in heavier mass will obtain comparatively high damping, then damping unit 3 is in the vertical line position of pedestal 31, upper and lower two damping wheels 30 can be established, and stay cord 12 walks around in S shape mode, the higher damping that can obtain equally, one of them damping wheel 30 also can be freewheel.

Shown in Fig. 7, pedestal 31 set by damping unit 3 can be provided with a chute 310, this chute 310 provide a slide block 322 slide and put, wherein a damping wheel 30 is be combined in pedestal 31 by affiliated central axis 301, another damping wheel 30 is combined in slide block 322 by affiliated central axis 301, slide block 322 is again by bolt 321 modulations set by a changing device 32, then change upper and lower displacement state, this upper and lower displacement state then can change the level angle right mutually with another damping wheel 30 center and change, utilize this level angle to change and can coil the contact area of each damping wheel 30 by modulation stay cord 12, and change the coiling angle of stay cord 12, and the damping that modulation is different.

Shown in Fig. 8, damping unit 3 is support body by a pedestal 31, interactive damping can be produced between central axis 301 set by pedestal 31 and damping wheel 30, the wherein restriction of central axis 301 extensible acceptance one check mechanism 4, central axis 301 coaxially extends an adjusting lever 42, adjusting lever 42 is through pedestal 31, a tension spring 41 is provided with at pedestal 31 and the opposite face of damping wheel 30, utilize the tension force of tension spring 41 can produce a frictional force to damping wheel 30, the strength of this frictional force and damping.

Wherein the Single port position of tension spring 41 is at the opposing end surface of pedestal 31, another port is can move via the wiping of pressure ring 44 of pulling the opposing end surface done to damping wheel 30, the degree of depth of adjusting lever 42 is adjusted via varying element 43, change the deformation rate of tension spring 41, and because of deformation rate the elastic strain masterpiece do not produced not etc. be used in damping wheel 30 one end, make it the effect that different damping occurs, make stay cord 12 lower end of coiling obtain the application of different damping ability.

The utility model is embodied as this damping wheel 30 place horizontal level for changing up and down, and time down, its wheel face or stay cord 12 figure walked around can be prevented by external force, reaches the auxiliary of damping.

Relevant damping wheel 30 can be gone up, being embodied as of lower displacement utilizes a modified gear 5, support that damping wheel 30 can be gone up, lower displacement, the structure of this modified gear 5 and working method refer to shown in Fig. 9, modified gear 5 is combined in a side of pedestal 31, modified gear 5 is provided with a fork 51, refute via a fulcrum 52 and be connected on pedestal 31, one end of fork 51 is for being provided with balancing weight 53, another working end is via central axis 301 combination of dampings wheel 30, the wheel of damping wheel 30 is looked like the aforementioned stay cord 12 that provides and walked around, fork 51 can form swing via fulcrum 52, damping wheel 30 is made to be able to conjugate up and down, damping wheel 30 can be affected when stay cord 12 declines time to make damping wheel 30 toward declining, damping wheel 30 is via after decline centered by fulcrum 52, its wheel face or the braking surface 61 being subject to a braking parts 6 rubbed, form the auxiliary of damping, wherein this braking parts 6 pairs of damping wheels 30 friction can direct friction at the relative wheel face of damping wheel 30, or the stay cord 12 line body surface utilizing this braking parts 6 to rub to walk around, two kinds of forms all likely produce damping friction effect.

The lower end of balancing weight 53 can be provided with a spacing pillow 54, and this spacing pillow 54 can determine the angle that swings of fork 51 can not be excessive, makes the height of the displacement up and down specification of damping wheel 30 in a small spacing.

Shown in Figure 10, if when we put heavy curtain with the operation of hand limb, when then applying that tensile force f 1 acts on stay cord 12, because the figure of stay cord 12 is around to overdamp wheel 30, so by damping wheel 30 via acting as after rotation down declines centered by fulcrum 52, the week circle wheel face of damping wheel 30, comprise stay cord 12 the line body walked around surface can be subject to the braking surface 61 of braking parts 6 produce frictional force effect, this frictional force is applied to the coil appearance that damping wheel 30 cylindrical walked around by stay cord 12, or the wheel face of braking surface 61 direct friction damping wheel 30, two kinds all may can produce damping to damping wheel 30.

If wherein fixing between this damping wheel 30 and central axis 301, the stay cord 12 walked around then can be utilized to allow braking surface 61 rub, if be movable between damping wheel 30 and central axis 301, make damping wheel 30 in rotatable situation, then braking surface 61 can the wheel face of direct friction damping wheel 30.

When reclaiming heavy curtain, we can loosen 12 as the mode of operation of Fig. 4, then balancing weight 53 can fall and be subject to spacing pillow 54 limit angle of oscillation position, and make between stay cord 12 and damping wheel 30 for loose shape in order to backrush.

Above-mentioned for utilizing the support of modified gear 5 that damping wheel 30 can be conjugated up and down, when conjugating up and down, damping wheel 30 or central axis 301 external surface walked around or the prevention that is subject to braking parts 6 and produce damping action, wherein the braking surface 61 of braking parts 6 can be set to the surface of the tool friction effect such as serrated face or thick behaviour face, can reach and damping wheel 30 or the stay cord 12 appearance line body walked around are rubbed, reach damping more specifically and occur.

Damping wheel 30 set by above-mentioned each device is placed by affiliated central axis 301, this damping wheel 30 is for be fixed or rotatable, the direction of set its radial direction of wheel face 300 is the turnover direction being parallel to stay cord 12, and in order to coordinate this turnover direction, central axis 301 then belonging to damping wheel 30, it axially passes in and out direction with stay cord 12 is vertical relation, and stay cord 12 can be provided to be justify the wheel face 300 of butt to turnover damping wheel 30.

The utility model provides a kind of new idea, effectively to prevent heavy curtain 100 landing, and the outlet position of element 11 is put at volume, be provided with a damping unit 3, this damping unit 3 can do downslide damping to the stay cord 12 of heavy curtain 100, the energy of this damping is the machinery concussion strength of blowing generation of large too empirical value wind-force to heavy curtain 100 is basic principle, and the damping of damping unit 3 is the power of pulling of drawing being less than user's hand limb, and this stay cord 12 is when being subject to user manpower to be received heavy curtain 100, namely lower purlin 13 up makes stay cord 12 lose its line of pulling force and is in part in damping wheel 30, form emptying state, make to produce between damping unit 3 to depart from, namely opposite side flexible member 20 makes the revolution burden of low force, the stay cord 12 of emptying can be furled, system concept is that the interference stay cord 12 that the leading-out terminal putting element 11 at volume is provided with a damping unit 3 unidirectional down slides.

Claims (13)

1. a formula groups of shades falls in resistance, it is characterized in that it includes: a upper purlin, and inner longitudinal space is provided with a volume and puts element; One feedback device, it is interaction relation that working end and above-mentioned volume put elements combination; One group of stay cord, upper end winding is combined in above-mentioned volume and puts element, and a heavy curtain is crossed in figure break-through, and lower end is in conjunction with a lower purlin; One group of damping unit, is arranged in upper purlin inside, is provided with a pedestal, is positioned at the outlet position that volume puts element, and pedestal combination has a damping wheel, and the wheel face of damping wheel provides stay cord to coil through figure.

2. formula groups of shades falls in resistance according to claim 1, it is characterized by the central axis axis direction of damping wheel, puts the outlet wiring direction of element for vertical with volume.

3. formula groups of shades falls in resistance according to claim 1, and it is characterized by damping wheel is two, and level left and right relative combinations is in the side of pedestal, and two central axiss are parallel.

4. formula groups of shades falls in resistance according to claim 1, and it is characterized by damping wheel is two, and relative combinations is in the side of pedestal vertically, and two central axiss are parallel.

5. formula groups of shades falls in resistance according to claim 4, it is characterized by damping wheel is two, is located at the both sides of pedestal respectively, and two central axiss are parallel, the central axis of one damping wheel is combined in a slide block, and slide block can make upper and lower displacement modulation by the chute set by pedestal by a bolt modulation.

6. formula groups of shades falls in resistance according to claim 1, and it is characterized by damping wheel for producing damping by a check mechanism effect, this check mechanism is by a tension spring, and one end is limited by pedestal, and the other end opens the apparent surface being pressed on damping wheel.

7. formula groups of shades falls in resistance according to claim 6, pull pressure ring and be compressed on the opposing end surface of damping wheel in the one end one that it is characterized by tension spring, one end is resisted at pedestal, central axis pivot set by damping wheel is through damping wheel, the other end is coaxially combined with an adjusting lever, the length of adjusting lever modulation tension spring through changing device, enters to change damped coefficient.

8. formula groups of shades falls in resistance according to claim 1, it is characterized by volume and puts between element and feedback device, is connected to a speed change gear.

9. formula groups of shades falls in resistance according to claim 8, and it is characterized by this speed change gear is planetary gearsets.

10. formula groups of shades falls in resistance according to claim 8, and it is characterized by this speed change gear is the working speed lowering feedback device.

Formula groups of shades falls in 11. resistances according to claim 1, it is characterized by this damping wheel and supported by a modified gear, can make upper and lower shifting movement, is subject to a braking parts and brakes during decline.

Formula groups of shades falls in 12. resistances according to claim 11, and it is characterized by this modified gear is refute by one the fork being connected to pedestal, and in fork working end in conjunction with damping wheel, the below of damping wheel is met and is provided with a braking parts.

Formula groups of shades falls in 13. resistances according to claim 12, it is characterized by the other end of the contrary damping wheel of fork, is provided with a balancing weight.