CN208473670U - The resistance mechanism of curtain rope body - Google Patents

Abstract

A kind of resistance mechanism of curtain rope body is used to generate resistance to curtain rope body, and body of restricting can be with being driven with retracting direction or to release direction mobile with the folding of curtain.Resistance mechanism includes bias piece and resistance assembly.The neighbouring rope body setting of resistance assembly, and body of restricting correspond to the section of resistance assembly and is set around resistance assembly, and resistance assembly is made to synchronize actuation with the movement for body of restricting.Resistance assembly is equipped with bias piece, and when body of restricting is with retracting direction or releases direction movement, bias piece inhibits resistance assembly actuation, and resistance mechanism is made to generate resistance to rope body.When rope body with retracting direction when pulled, bias piece to resistance assembly generate the first frictional resistance；When rope body is to release direction when pulled, bias piece generates the second frictional resistance to resistance assembly, and the second frictional resistance is different from the first frictional resistance.

Description

The resistance mechanism of curtain rope body

Technical field

The resistance mechanism that the utility model relates to a kind of to take down the exhibits for controlling curtain；More particularly to one kind is for curtain rope body Generate the resistance mechanism of resistance.

Background technique

General curtain without stretching wire includes upper beam, underbeam and curtain, and wherein underbeam is located at below upper beam, and curtain is located at upper beam And between underbeam.In addition, the power plant module that general curtain without stretching wire uses spring case to furl or release as control drawstring mostly, And spring case is generally disposed in upper beam.Spring case includes reel, driving wheel and scroll spring, wherein reel and driving wheel Be engaged with each other gearing, and one end of scroll spring is fixed on driving wheel.One end of drawstring is connected to reel, and the other end is logical Underbeam is connected to after crossing curtain.

When underbeam is pulled away from upper beam, and curtain is unfolded, drawstring is driven by underbeam to be released by reel, and reel Tension rope band is moved and is rotated simultaneously.At this point, reel drives driving wheel rotation, it is wound in scroll spring on driving wheel, in turn Accumulate the backrush elastic force of scroll spring.Conversely, when folding curtain, scroll spring is put aside when underbeam is pushed closer to upper beam Backrush elastic force driving driving wheel rotation, and then drive reel furl drawstring.

In addition, passing through weight pulling force, the scroll spring of underbeam and curtain when removal is applied to the thrust or pulling force of underbeam Backrush elastic force and drawstring inside the curtain suffered by frictional resistance reach balance, and make underbeam that can rest on designated position. However, the numerical value of the backrush elastic force of the weight pulling force and scroll spring of underbeam and curtain is only general in general curtain without stretching wire It slightly estimates and obtains, accurate data can not be measured, therefore in practical operation, often have the backrush elastic force of scroll spring excessive or not The problem of foot exists.For example, when the backrush elastic force of scroll spring is excessive, underbeam is not easy to be pulled and curtain is made to be not easy to open up It opens；Or because the backrush elastic force of scroll spring is excessive, and underbeam and the weight pulling force of curtain are insufficient, so that underbeam is by backrush elastic force It influences and gradually moves up, lower position can not be rested on for a long time.On the other hand, when the backrush elastic force deficiency of scroll spring, Underbeam is not easy to be pushed upwardly and curtain is made to be not easy to fold；Or because underbeam and the weight pulling force of curtain are excessive, and scrollwork bullet The backrush elastic force of spring can not be supported, so that underbeam is gradually glided by backrush elastic effect, can not rest on high bit for a long time It sets.

Therefore, how to make the underbeam of curtain without stretching wire be easy to push and pull, and be easy to stay in designated position, actually need at present Overcome the problems, such as.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of resistance mechanisms of curtain rope body；When curtain rope body is past When pulled, bias piece is to the difference of frictional resistance caused by resistance assembly for different directions.

For edge to reach above-mentioned purpose, the utility model provides a kind of resistance mechanism of curtain rope body, for a curtain rope Body generates resistance, which can release direction movement with the folding of the curtain with a retracting direction or one with being driven.The resistance Force mechanisms include a bias piece and a resistance assembly, and the resistance assembly, the neighbouring rope body is arranged, and the rope body corresponds to the resistance group The section of part is set around the resistance assembly, and the resistance assembly is made to synchronize actuation with the movement of the rope body.The resistance assembly with should Bias piece is equipped with, and when the rope body with the retracting direction or this release direction it is mobile when, which inhibits the resistance group Part actuation makes the resistance mechanism generate resistance to the rope body.When the rope body with the retracting direction when pulled, the bias piece is to this Resistance assembly generates one first frictional resistance；When the rope body releases direction when pulled with this, the bias piece is to the resistance assembly One second frictional resistance is generated, and second frictional resistance is different from first frictional resistance.

In the utility model embodiment, which includes a resistance wheel, which is set around the resistance assembly Section tight beam makes the resistance wheel be driven and be rotated by the rope body in the resistance wheel.When the rope body with the retracting direction when pulled, The resistance wheel is rotated towards a first direction；When the rope body releases direction when pulled with this, which turns towards a second direction Dynamic, the second direction is in contrast to the first direction.

In the utility model embodiment, which further comprises a pedestal, and the resistance wheel and the bias piece are set It is placed on the pedestal, and the resistance wheel can be rotated relative to the pedestal.

In the utility model embodiment, which has an accommodating space, and the resistance wheel and the bias piece are set to this In accommodating space.

In the utility model embodiment, a wedge type has been collectively formed in a part of abutment wall of the bias piece and the accommodating space Region, the wedge type region have a narrow side and a spacious side；The resistance wheel is displaceably set in the wedge type region, and can By operatively being moved between the narrow side and the spaciousness side.

In the utility model embodiment, when the rope body with the retracting direction when pulled, which can be by the rope body It pulls toward narrow side movement, the resistance wheel is made to be pushed against by the bias piece and inhibit to rotate, and then generate first friction and hinder Power；When the rope body releases direction when pulled with this, which can be pulled by the rope body toward spaciousness side movement, at this time should Resistance wheel is optionally contacted with the bias piece, and then generates second frictional resistance, and second frictional resistance is less than this First frictional resistance.

In the utility model embodiment, when the rope body with the retracting direction when pulled, which can be by the rope body It pulls toward spaciousness side movement, the resistance wheel is optionally contacted with the bias piece at this time, and then generates first friction Resistance；When the rope body releases direction when pulled with this, which can be pulled by the rope body toward narrow side movement, make this Resistance wheel is pushed against by the bias piece and inhibits to rotate, and then generates second frictional resistance, and be greater than should for second frictional resistance First frictional resistance.

In the utility model embodiment, the bias piece have a bending segment close to the wedge type region the narrow side, when The resistance wheel is pulled by the rope body toward when narrow side movement, and the bending segment pushing and pressing of the bias piece are in the resistance wheel, with suppression The rotation for making the resistance wheel keeps the resistance wheel speed slack-off.

In the utility model embodiment, a supporting part of the bias piece selectively connects any for being butted on the accommodating space Abutment wall；The bias piece includes a free end, which is not located at the supporting part, and close to the spaciousness in the wedge type region Side.

In the utility model embodiment, which includes connected a constriction and a supporting part, which supports It is against an abutment wall of the accommodating space, and the constriction is the drive by the supporting part, and optionally tight beam resistance wheel So that the resistance wheel can not rotate relative to the constriction or unclamp the resistance wheel so that the resistance wheel can opposite constriction turn It is dynamic.

In the utility model embodiment, coiling direction of the constriction of the bias piece on the resistance wheel and the rope body It is identical around set direction on the resistance wheel；When the rope body with the retracting direction when pulled, which can be drawn by the rope body It moves and is rotated towards the first direction, at this time because the supporting part of the bias piece is supported in the abutment wall, move the bias piece can not, The rotation of the resistance wheel can drive the constriction slightly to unclamp simultaneously, rotate the resistance wheel can relative to the bias piece, at this time should Constriction generates first frictional resistance to the resistance wheel, and then inhibits the rotation of the resistance wheel；When the rope body is with the side of releasing To when pulled, which can be pulled by the rope body and be rotated towards the second direction, at this time because the constriction tight beam is in the resistance Wheels makes the resistance wheel that the bias piece be driven to rotate together, while driving the supporting part of the bias piece selectively to rub should The abutment wall of pedestal, and then the bias piece is made selectively to generate second frictional resistance, and the second friction resistance to the pedestal Power is less than first frictional resistance.

In the utility model embodiment, coiling direction of the constriction of the bias piece on the resistance wheel and the rope body Winding on the resistance wheel is contrary；When the rope body with the retracting direction when pulled, which can be drawn by the rope body It moves and is rotated towards the first direction, at this time because the bias piece tight beam is in the resistance wheel, the resistance wheel is made to drive the bias piece together Rotation, while driving the supporting part of the bias piece selectively to rub the abutment wall of the pedestal, and then select the bias piece First frictional resistance is generated to property to the pedestal；When the rope body releases direction when pulled with this, which can be by the rope Body is pulled and is rotated towards the second direction, at this time because the supporting part of the bias piece is supported in the abutment wall, makes the bias piece can not Movement, while the rotation of the resistance wheel can drive the bias piece tight beam slightly to be unclamped in the part of the resistance wheel, make the resistance wheel It can be rotated relative to the bias piece, the constriction generates second frictional resistance to the resistance wheel at this time, and then inhibits the resistance wheel Rotation, and second frictional resistance be greater than first frictional resistance.

In the utility model embodiment, which is a coil spring, and the diameter of the constriction is less than the supporting part Diameter.

The effect of the utility model is that, when body of restricting is furled and released, resistance assembly can be influenced by the bias piece, and The bias piece generates different frictional resistance to the resistance resistor.

Detailed description of the invention

Fig. 1 is the perspective view of the curtain without stretching wire of the embodiments of the present invention；

Fig. 2 is the perspective view of the spring case of the first embodiment of the utility model；

Fig. 3 is the main view of the spring case of the first embodiment of the utility model, and medium pulling rope is mobile to release direction；

Fig. 4 is the cross-sectional view drawn along the hatching 4-4 of Fig. 3, and medium pulling rope is mobile to release direction；

Fig. 5 is the right part transparent bottom view of the spring case of Fig. 3, and wherein the shaft of elastic slice and friction pulley is with solid line table Show, other elements are represented by dotted lines；

Fig. 6 is another main view of the spring case of the first embodiment of the utility model, and medium pulling rope is moved with retracting direction It is dynamic；

Fig. 7 is the cross-sectional view drawn along the hatching 7-7 of Fig. 6, and medium pulling rope is mobile with retracting direction；

Fig. 8 is the right part transparent bottom view of the spring case of Fig. 6, and wherein the shaft of elastic slice and friction pulley is with solid line table Show, other elements are represented by dotted lines；

Fig. 9 is the main view of the spring case of the second embodiment of the utility model, and medium pulling rope is mobile to release direction；

Figure 10 is the cross-sectional view drawn along the hatching 10-10 of Fig. 9, and medium pulling rope is mobile to release direction；

Figure 11 is the right part transparent bottom view of the spring case of Fig. 9, and wherein the shaft of elastic slice and friction pulley is with solid line table Show, other elements are represented by dotted lines；

Figure 12 is another main view of the spring case of the second embodiment of the utility model, and medium pulling rope is moved with retracting direction It is dynamic；

Figure 13 is the cross-sectional view drawn along the hatching 13-13 of Figure 12, and medium pulling rope is mobile with retracting direction；

Figure 14 is the right part transparent bottom view of the spring case of Figure 12, and wherein the shaft of elastic slice and friction pulley is with solid line table Show, other elements are represented by dotted lines；

Figure 15 is the perspective view of the spring case of the 3rd embodiment of the utility model；

Figure 16 is the main view of the spring case of the 3rd embodiment of the utility model；

Figure 17 is the cross-sectional view drawn along the hatching 17-17 of Figure 16；

Figure 18 is the optical cable of the spring case of the 3rd embodiment of the utility model, wherein friction pulley, coil spring And pedestal is to indicate in an exploded manner；

Figure 19 is the top view of the right part of the pedestal of Figure 18, shows the abutment wall and accommodating space of pedestal；

Figure 20 is that the pedestal of Figure 19 adds the top view of coil spring, and wherein coil spring is located in accommodating space；

Figure 21 is the partial sectional view drawn along the hatching 21-21 of Figure 17；

Figure 22 is the partial sectional view drawn along the hatching 22-22 of Figure 16；

Figure 23 is the main view of the spring case of the fourth embodiment of the utility model；

Figure 24 is the partial sectional view drawn along the hatching 24-24 of Figure 23；

Figure 25 is the optical cable of the spring case of the 5th embodiment of the utility model, wherein friction pulley, coil spring And pedestal is to indicate in an exploded manner；

Figure 26 is the top view of the right part of the pedestal of Figure 25, shows the abutment wall and accommodating space of pedestal；And

Figure 27 is that the pedestal of Figure 26 adds the top view of coil spring, and wherein coil spring is located in accommodating space.

Appended drawing reference is as follows:

1 curtain without stretching wire

2,2a, 2b drawstring

3 upper beams

5 underbeams

7 curtains

10,20,30,40,50 spring case

11,31,51 pedestal

112,312,512 abutment wall

113,313,513 accommodating space

114,214 wedge type region

114a, 214a narrow side

114b, 214b spaciousness side

13,23,33,53 bias piece

131,231 first end feet

133,233 second end feet

134,234 bending segment

12,32 friction pulley

121,321 shaft

14,34 reel

17,37 scroll spring

16,36 driving wheel

331,531 constriction

332,532 supporting part

Specific embodiment

For that can be illustrated more clearly that the utility model, now lifts preferred embodiment and cooperate attached drawing detailed description is as follows.It please join Shown in Fig. 1, the curtain without stretching wire 1 of the utility model embodiment includes upper beam 3, underbeam 5 and curtain 7, and wherein underbeam 5 is located at upper beam 3 lower sections, and curtain 7 is between upper beam 3 and underbeam 5.In Fig. 1, curtain 7 covers knot made of being arranged as multiple spacing with blades It is indicated for structure；However, the folding masking structure being made of single-layer or multi-layer sheet body also can be used in curtain 7 in practice.

It please join shown in Fig. 2 to Fig. 7 again, be the spring case 10 of the utility model first embodiment, it is suitable for no drawstring windows The power plant module that curtain 1 is furled or released as control drawstring 2, and spring case 10 is set in upper beam 3.Spring case 10 includes friction Wheel 12, reel 14, driving wheel 16 and scroll spring 17, wherein reel 14 and driving wheel 16 are engaged with each other gearing, and scrollwork One end of spring 17 is fixed on driving wheel 16.One end of drawstring 2 is connected to reel 14, and the other end connects after passing through curtain 7 It is connected to underbeam 5.In addition, the neighbouring friction pulley 12 of a part of drawstring 2, and tight beam is on friction pulley 12.Furthermore, it is understood that due to drawing The both ends of rope 2 are connected to reel 14 and underbeam 5, and are tensioning state, therefore 2 tight beam of drawstring is in friction pulley 12.Work as drawing Rope 2 is toward retracting or releases direction when pulled, and friction pulley 12 can be driven by drawstring 2 and be rotated；Conversely, if drawstring 2 is static not When dynamic, then friction pulley 12 is also stationary.

When underbeam 5 is pulled away from upper beam 3, and curtain 7 is unfolded, drawstring 2 is driven by underbeam 5 to be released by reel 14, And reel 14 is driven by drawstring 2 simultaneously and is rotated.At this point, reel 14 drives driving wheel 16 to rotate, make scroll spring volume 17 It is around on driving wheel 16, and then accumulates the backrush elastic force of scroll spring 17.Conversely, making curtain when underbeam 5 is pushed closer to upper beam 3 When body 7 folds, the backrush elastic force driving driving wheel 16 that scroll spring 17 is put aside is rotated, and then reel 14 is driven to furl drawstring 2。

In Fig. 2 to Fig. 8, spring case 10 further comprises pedestal 11 and bias piece 13.Friction pulley 12, bias piece 13 and volume Line wheel 14 is all set on pedestal 11, and friction pulley 12 and reel 14 can all be operated and be rotated relative to pedestal 11.Pedestal 11 have multiple abutment walls 112, and abutment wall 112 is the accommodating space 113 for being enclosed polygon one by one.Friction pulley 12 shaft 121 and bias piece 13 is located in accommodating space 113.

In the present embodiment, bias piece 13 is an elastic slice, includes the first end feet 131, the second end feet 133 and bending segment 134. First end feet 131 is securable on the abutment wall 112 of pedestal 11, or is movably resisted against on the abutment wall 112 of pedestal 11；In reality In business, the first end feet 131 also optionally connects any interior angle for being butted on accommodating space 113.

In Fig. 5 and Fig. 8, a part of abutment wall 112 of elastic slice 13 and pedestal 11 is enclosed a wedge type region 114 jointly, Wedge type region 114 has narrow side 114a and spaciousness side 114b.The shaft 121 of friction pulley 12 is located in wedge type region 114, and can By operatively being moved between narrow side 114a and spaciousness side 114b.The bending segment 134 of elastic slice 13 is proximate to wedge type space 114 Narrow side 114a, but far from spaciousness side 114b；Second end feet 133 of elastic slice 13 is a free end, the width close to wedge type region 114 Spacious side 114b, but far from narrow side 114a.However, bias piece 13 is not limited in practice with elastic slice, as long as can be empty in accommodating Between form the objects in wedge type regions 114 in 113 and be applicable in；Wherein again there is bullet close to the narrow side 114a in wedge type region 114 Property object be preferred, in order to by its elasticity make object push against extrusion friction wheel 12 shaft 121.In addition, wedge type region 114 Narrow side 114a be proximate to reel 14, and spaciousness side 114b is far from reel 14；I.e. the bending segment 134 of elastic slice 13 is close to volume Line wheel 14, and the second end feet 133 of elastic slice is far from reel 14.

The right part and Fig. 5 of the spring case 10 in Fig. 4 are please referred to as a result, and drawstring 2 is furled in a counterclockwise direction in volume In line wheel 14, and tight beam friction pulley 12；Therefore when reel 14 is driven by driving wheel 16 and is furled drawstring 2, reel 14 with Rotationally clockwise, meanwhile, the direction that drawstring 2 can draw friction pulley 12 toward reel 14 is close, i.e., moves toward narrow side 114a It is dynamic, at this point, friction pulley 12 also rotates in a clockwise direction because of the drive by drawstring 2；On the other hand, when the shaft of friction pulley 12 121 are moved to when contacting with the bending segment 134 of elastic slice 13, and the bending segment 134 of elastic slice 13 can push against the shaft 121 of friction pulley 12, So as to reducing the velocity of rotation of friction pulley 12.In other words, when the bending segment 134 of elastic slice 13 pushes against the shaft of extrusion friction wheel 12 When 121, can shaft 121 to friction pulley 12 generate the first frictional resistance, and then inhibit the rotation of friction pulley 12, make friction pulley 12 Rotation be obstructed.

Fig. 7 right part and Fig. 8 are please referred to, when pulling underbeam 5 curtain 7 is unfolded, drawstring 2 is released by reel 14, And reel 14 be rotate in a counterclockwise direction, meanwhile, pull the pulling force of underbeam 5 to be directed away from friction pulley 14 by drawstring 2 The direction of reel 14 is drawn, so that the shaft 121 of friction pulley 12 is driven and past spaciousness side 114b movement, at this point, friction pulley 12 rotate in a counterclockwise direction due to by the drive of drawstring 2；On the other hand, the shaft 121 of friction pulley 12 is far from the curved of elastic slice 13 Trisection 134 generates the first frictional resistance to the shaft 121 of friction pulley 12 to terminate the bending segment 134 of elastic slice 13.In the present embodiment In, when the shaft 121 of friction pulley 12 is moved to spacious side 114b, the second end feet 133 of elastic slice 13 can slightly contact friction The shaft 121 of wheel 12, and then the second frictional resistance is generated to the shaft of friction pulley 12 121；But due to the second end feet of elastic slice 13 133 have biggish mobile space in spacious side 114b, when the shaft 121 of friction pulley 12 is moved to spacious side 114b, the Two end feets 133 are not supported tug by the abutment wall 112 of pedestal 11, therefore are only the shafts 121 for slightly contacting friction pulley 12, cause to be produced The second raw frictional resistance is much smaller than the first frictional resistance above-mentioned.However, in practical operation, when the shaft of friction pulley 12 121 when being moved to spacious side 114b, and the shaft 121 of friction pulley 12 may also not contacted each other with the second end feet 133 of elastic slice, be made It obtains and is generated between the shaft 121 of friction pulley 12 and the second end feet 133 of elastic slice without frictional resistance, is i.e. the number of the second frictional resistance Value is 0；With this condition, the second frictional resistance is also much smaller than the first frictional resistance above-mentioned.

It, may be because of underbeam when removing the external force for pulling underbeam 5 after the underbeam 5 of curtain without stretching wire 1 is pulled to designated position 5 are less than the backrush elastic force of scroll spring 17 with the weight pulling force of curtain 7, and underbeam 5 is made to go up upwards.At this point, scroll spring 17 Backrush elastic force can slightly pull drawstring 2 by reel 12, make drawstring 2 draw friction pulley 12 it is close toward 14 direction of reel, Until the shaft 121 of friction pulley 12 is contacted with the bending segment 134 of elastic slice 13, and then elastic slice 13 is made to generate friction resistance to friction pulley 12 Power.Meanwhile generated frictional resistance may make tight beam to be not easy band in the drawstring 2 of friction pulley 12 between friction pulley 12 and elastic slice 13 Dynamic friction wheel 12 rotates, and then the movement of drawstring 2 is made to be obstructed, and contends with scrollwork bullet so as to the weight pulling force of auxiliary underbeam 5 and curtain 7 The backrush elastic force of spring 17 enables the stabilization of underbeam 5 to rest on designated position.

It please join shown in Fig. 9 to Figure 14, be the spring case 20 of the utility model second embodiment, be also applicable to no drawstring Curtain 1.Spring case 20 is roughly the same with the spring case 10 of first embodiment.However, the difference of second embodiment and first embodiment Different to be, the bias piece 23 in second embodiment is different from the bias piece in first embodiment in the setting direction in spring case 20 13 setting direction in spring case 10.

In the present embodiment, bias piece 23 is an elastic slice, includes the first end feet 231, the second end feet 233 and bending segment 234. First end feet 231 is securable on the abutment wall 112 of pedestal 11, or is movably resisted against on the abutment wall 112 of pedestal 11；In reality In business, the first end feet 231 also optionally connects any interior angle for being butted on accommodating space 113.

In Figure 11 and Figure 14, a part of abutment wall 112 of elastic slice 23 and pedestal 11 is enclosed a wedge type region jointly 214, wedge type region 214 has narrow side 214a and spaciousness side 214b.The shaft 121 of friction pulley 12 is located in wedge type region 214, And it can be by operatively being moved between narrow side 214a and spaciousness side 214b.The bending segment 234 of elastic slice 23 is close to wedge type space 214 Narrow side 214a, but far from spaciousness side 214b；Second end feet 233 of elastic slice 23 is a free end, close to wedge type region 214 Spacious side 214b, but far from narrow side 214a.In addition, the narrow side 214a in wedge type region 214 is far from reel 14, and spacious side 214b is close to reel 14；I.e. the bending segment 234 of elastic slice 23 is far from reel 14, and the second end feet 233 of elastic slice 23 is close to volume Line wheel 14.

In Figure 10 right part and Figure 11, when reel 14 is driven by driving wheel 16 and is furled drawstring 2, reel 14 It rotates in a clockwise direction, meanwhile, the direction that drawstring 2 can draw friction pulley 12 toward reel 14 is close, so that friction pulley 12 Shaft 121 is driven and the spacious side 214b in past wedge type region 214 is mobile；At this point, friction pulley 12 can by drawstring 2 drive with suitable Clockwise rotation.On the other hand, when the shaft 121 of friction pulley 12, which is driven, to be moved toward spaciousness side 214b, friction pulley 12 Bending segment 234 of the shaft 121 far from elastic slice.In the present embodiment, when the shaft 121 of friction pulley 12 is moved to spacious side 214b When, the second end feet 233 of elastic slice 23 can slightly contact the shaft 121 of friction pulley 12, and then produce to the shaft of friction pulley 12 121 Raw first frictional resistance.However, in practical operation, when the shaft 121 of friction pulley 12 is moved to spacious side 214b, friction pulley 12 shaft 121 and the second end feet 233 of elastic slice 23 may also not contact each other, therefore in the shaft of friction pulley 12 121 and bullet It is generated between second end feet 233 of piece 23 without frictional resistance, i.e., the numerical value of the first frictional resistance is 0.

In Figure 12 right part and Figure 13, when pulling underbeam 5 curtain 7 is unfolded, drawstring 2 is released by reel 14, And reel 14 rotates in a counterclockwise direction, meanwhile, pull the pulling force of underbeam 5 that friction pulley 14 is directed away from volume by drawstring 2 The direction of line wheel 14 is drawn, at this point, friction pulley 12 can be rotated in a counterclockwise direction by the drive of drawstring 2；On the other hand, work as friction The shaft 121 of wheel 12 is moved to when contacting with the bending segment 234 of elastic slice 23, and the bending segment 234 of elastic slice 23 can push against friction pulley 12 Shaft 121, so as to reduce friction pulley 12 velocity of rotation.In other words, when the bending segment 234 of elastic slice 23 pushes against extrusion friction When the shaft 121 of wheel 12, can shaft 121 to friction pulley 12 generate the second frictional resistance, and then inhibit the rotation of friction pulley 12, The rotation of friction pulley 12 is set to be obstructed.In this case, since the bending segment 234 of elastic slice 23 can push against the shaft 121 of friction pulley 12, Therefore the second frictional resistance caused by is much larger than the first frictional resistance above-mentioned.

It, may be because of underbeam when removing the external force for pulling underbeam 5 after the underbeam 5 of curtain without stretching wire 1 is pushed to designated position 5 are greater than the backrush elastic force of scroll spring 17 with the weight pulling force of curtain 7, and fall underbeam 5 downwards.At this point, underbeam 5 and curtain 7 weight pulling force can make reel 14 is past to rotate in an anti-clockwise direction by drawstring 2, and then drive friction pulley 12 far from reel 14, until the shaft 121 of friction pulley 12 is contacted with the bending segment 234 of elastic slice 23, and then elastic slice 23 is made to rub the generation of friction pulley 12 Wipe resistance.Meanwhile between elastic slice 23 and friction pulley 12 generated frictional resistance may make tight beam in friction pulley 12 drawstring 2 not Easily friction pulley 12 is driven to rotate, and then the movement of drawstring 2 is made to be obstructed, the backrush elastic force of scroll spring 17 is thus assisted to contend with underbeam 5 with the weight pulling force of curtain 7, so that underbeam 5 is stablized and rest on designated position.

It please join shown in Figure 15 to Figure 22, be the spring case 30 of the utility model 3rd embodiment, be also applicable to no drawing Rope curtain 1.Spring case 30 includes friction pulley 32, reel 34, driving wheel 36 and scroll spring 37, wherein reel 24 and driving Wheel 26 is engaged with each other, and one end of scroll spring 37 is fixed on driving wheel 36.One end of drawstring 2a is connected to reel 34, The other end is connected to underbeam 5 after passing through curtain 7.Friction pulley 32 and drawstring 2a are located adjacent one another, and drawstring 2a tight beam is in friction pulley 32. It furthermore, it is understood that since the both ends of drawstring 2a are connected to reel 34 and underbeam 5, and is tensioning state, therefore drawstring 2a Tight beam is in friction pulley 32.When drawstring 2a toward retracting or releases direction when pulled, friction pulley 32 can be driven by drawstring 2a and be turned It is dynamic；Conversely, if friction pulley 32 is also stationary when drawstring 2a is stationary.

Spring case 30 further comprises pedestal 31 and bias piece 33.Friction pulley 32, bias piece 33 and reel 34 are respectively provided with In on pedestal 31, and friction pulley 32, bias piece 33 and reel 34 can all be operated and be rotated relative to pedestal 31.Pedestal 31 has There are multiple abutment walls 312, and abutment wall 312 forms accommodating space 313.It is empty that the shaft 321 and bias piece 33 of friction pulley 32 are located at accommodating Between in 313.

In the present embodiment, bias piece 33 be a coil spring, can outline be divided into the constriction 331 being connected with each other and top Support 332；Each abutment wall 312 is in ratchet-like, and the free end feet of supporting part 332 optionally connects and is butted on accommodating space 313 Any abutment wall 312.

331 perseverance of constriction of coil spring 33 is wound in the shaft 321 of friction pulley 32, and due to the constraint of coil spring 33 Portion 331 and supporting part 332 are connected with each other, therefore when friction pulley 32 rotates, supporting part 332 can be driven to rotate and make constriction 331 rotate synchronously with supporting part 332.In addition, the constriction 331 of coil spring 33 can be operated and selectively tight beam friction pulley 32 shaft 321 rotates shaft 321 from relative restraint portion 331；Under another mode of operation, the constraint of coil spring 33 Portion 331 can pine oil friction pulley 32 shaft 321, though constriction 331 is made still to contact shaft 321, shaft 321 can be with respect to supporting part 332 rotations.

In the right part and Figure 19, Figure 20, Tu22Zhong of the spring case 30 of Figure 18, the constriction 331 of coil spring 33 It is from bottom to top wound in the shaft 321 of friction pulley 32 in a counterclockwise direction, and supporting part 332 is connected in the lower end of constriction 331 Constriction 331 extends outwardly and is set in accommodating space 313, and but not limited to this；In practice, supporting part can also connect constraint It in portion is backward or extends downwardly, depending on the position for holding the abutment wall 312 of bad accommodating space 313.In Figure 18 and Figure 21, coil spring 33 supporting part 332 is located at the lower section of constriction 331, system that but not limited to this；In practice, since supporting part 332 and accommodating are empty Between 313 be fitted to each other setting, therefore supporting part 332 can cooperate the design of accommodating space 313, and adjust constriction 331 and contact 332 the relative position of each other of portion.For example, the supporting part 332 of coil spring 33 may also be at the top of constriction 331, only Want the end feet of supporting part 332 can be connect with any abutment wall 312 of accommodating space 313 to.

The right part and Figure 22 of Figure 18 are please referred to, the constriction 331 of coil spring 33 is in the shaft 321 of friction pulley 32 Coiling direction it is identical around set direction on friction pulley 32 as drawstring 2a.When reel 34 is driven by driving wheel 36 and furl drawing When rope 2a, reel 34 rotates in a clockwise direction, meanwhile, friction pulley 32 can also be turned in a clockwise direction by the drive of drawstring 2a It is dynamic.At this point, turn coil spring 33 can not because the end feet of supporting part 332 fastens the wherein abutment wall 312 in accommodating space 313 Dynamic and mobile, the rotation direction of friction pulley 32 is in contrast to constriction 331 around set direction at this time, it will drive constriction 331 to Outside slightly distending and unclamp shaft 321, make friction pulley 32 can relative restraint portion 331 rotate.However, even if friction pulley 32 can be opposite Constriction 331 rotate, at this time constriction 331 still keep be in close contact friction pulley 32 shaft 321 so that constriction 331 with rub Wipe and generate the first frictional resistance between the shaft 321 of wheel 32, and then inhibit the rotation of friction pulley 32, make the rotation of friction pulley 32 by Resistance.

Conversely, drawstring 2a is released by reel 34, and reel 34 is with the inverse time when pulling underbeam 5 curtain 7 is unfolded The rotation of needle direction, meanwhile, friction pulley 32 can be rotated in a counterclockwise direction by the drive of drawstring 2a.At this point, turning because of friction pulley 32 The dynamic direction of its shaft 321 of direction with 331 winding of constriction is identical, therefore the rotation of friction pulley 32 can promote the pact of coil spring 33 331 tight beam of beam portion relatively rotate the two will not, then friction pulley 32 can drive coil spring 33 in the shaft 321 of friction pulley 32 Synchronously rotated in a counterclockwise direction with the movement of drawstring 2a.In this situation, the supporting part 332 of coil spring 33 is with constraint The rotation in portion 331 and rotate and swiping pedestal 31 abutment wall 312, and then make coil spring 33 to pedestal 31 generate second friction hinder Power；Since the supporting part 332 of coil spring 33 is only the abutment wall 312 for slightly connecing rivet holder body 31, generated second rubs It wipes resistance and is much smaller than the first frictional resistance above-mentioned.

It, may be because of underbeam when removing the external force for pulling underbeam 5 after the underbeam 5 of curtain without stretching wire 1 is pulled to designated position 5 are less than the backrush elastic force of scroll spring 37 with the weight pulling force of curtain 7, and underbeam 5 is made to go up upwards.At this point, scroll spring 37 Backrush elastic force can pull drawstring 2a by reel 32, rotate drawstring 2a drawing friction wheel 32 in a clockwise direction, together When friction pulley 32 rotation the constriction 331 of coil spring 33 can be driven slightly to unclamp, and in coil spring 33 and friction pulley 32 Between generate frictional resistance to inhibit the rotation of friction pulley 32.Meanwhile the rotation of friction pulley 32 be suppressed will make tight beam in The drawstring 2a of friction pulley 32 is not easy that friction pulley 32 is driven to rotate, and then the movement of drawstring 2a is made to be obstructed, and thus assists underbeam 5 and curtain The weight pulling force of body 7 contends with the backrush elastic force of scroll spring 17, and the stabilization of underbeam 5 is enable to rest on designated position.

It please join shown in Figure 23 to Figure 24, be the spring case 40 of the utility model fourth embodiment, be also applicable to no drawing Rope curtain 1.Spring case 40 is roughly the same with the spring case 30 of 3rd embodiment.However, fourth embodiment and 3rd embodiment Difference is, the drawstring 2a that around set direction is different from 3rd embodiment of the drawstring 2b in fourth embodiment on friction pulley 32 On friction pulley 32 around set direction.

In Figure 24, coiling direction of the constriction 331 of coil spring 33 in the shaft 321 of friction pulley 32 and drawstring 2b Winding on friction pulley 32 is contrary.When reel 34 is driven by driving wheel 36 and is furled drawstring 2b, reel 34 with It rotates in an anti-clockwise direction, meanwhile, friction pulley 32 can also be rotated in a counterclockwise direction by the drive of drawstring 2b.At this point, because of constriction 331 identical as the rotation direction of friction pulley 32 around set direction and tight beam makes friction pulley 32 can band in the shaft 321 of friction pulley 32 Moving-wire coil spring 33 rotates in a counterclockwise direction together, but friction pulley 32 can not be rotated relative to coil spring 33.In this case, The supporting part 332 of coil spring 33 can be rotated with the rotation of constriction 331 and the abutment wall 312 of swiping pedestal 31, and then makes line Coil spring 33 generates the first frictional resistance to pedestal 31.

Conversely, drawstring 2b is released by reel 34, and reel 34 is with up time when pulling underbeam 5 curtain 7 is unfolded The rotation of needle direction, meanwhile, friction pulley 32 can be rotated in a clockwise direction by the drive of drawstring 2b.At this point, because of the end of supporting part 332 Foot fastens the wherein abutment wall 312 in accommodating space 313, makes coil spring 33 that can not rotate and move, while friction pulley 32 Rotation direction in contrast to constriction 331 around set direction, and then drive constriction 331 slightly outwards distending and unclamp shaft 321, Rotate friction pulley 32 can relative to coil spring 33.Even if however, friction pulley 32 can relative restraint portion 331 rotate, constriction 331 It is still in close contact the shaft 321 of friction pulley 32, so that generating the second friction between constriction 331 and the shaft 321 of friction pulley 32 Resistance, and then inhibit the rotation of friction pulley 32, so that the rotation of friction pulley 32 is obstructed.In this situation, although friction pulley 32 can phase Constriction 331 is rotated, but constriction 331 is still in close contact the shaft 321 of friction pulley 32, therefore generated second friction resistance Power is much larger than the first frictional resistance above-mentioned.

It, may be because of underbeam when removing the external force for pulling underbeam 5 after the underbeam 5 of curtain without stretching wire 1 is pushed to designated position 5 are greater than the backrush elastic force of scroll spring 37 with the weight pulling force of curtain 7, and fall underbeam 5 downwards.At this point, underbeam 5 and curtain 7 weight pulling force will pull drawstring 2b and release from reel 32, make drawstring 2b that friction pulley 32 be driven to rotate in a clockwise direction, together When friction pulley 32 rotation the constriction 331 of coil spring 33 can be driven slightly to unclamp, but constriction 331 is still in close contact at this time The shaft 321 of friction pulley 32, so that generating frictional resistance between coil spring 33 and friction pulley 32 to inhibit turning for friction pulley 32 It is dynamic.Meanwhile the rotation of friction pulley 32 is suppressed, and tight beam will be made to be not easy to drive 32 turns of friction pulley in the drawstring 2b of friction pulley 32 It is dynamic, and then the movement of drawstring 2b is made to be obstructed, thus assist the backrush elastic force of scroll spring 17 to contend with the weight of underbeam 5 and curtain 7 Pulling force enables the stabilization of underbeam 5 to rest on designated position.

It please join shown in Figure 25 to Figure 27, be the spring case 50 of the 5th embodiment of the utility model, be also applicable to no drawing Rope curtain 1.Spring case 50 is roughly the same with the spring case 30 of 3rd embodiment.However, the 5th embodiment and 3rd embodiment Difference is that the bias piece 53 and 513 shape of accommodating space in the 5th embodiment are different from the bias piece 33 in 3rd embodiment And 313 shape of accommodating space.In the 5th embodiment, accommodating space 513 is rounded, and the unique coil spring of bias piece 53, Can outline be divided into the constriction 531 and supporting part 532 being connected with each other, and 532 perseverance of supporting part connects the abutment wall for being butted on accommodating space 513 512。

In the right part and Figure 26, Tu27Zhong of the spring case 50 of Figure 25, the constriction 531 of coil spring 53 by lower and On be wound in the shaft 321 of friction pulley 32 in a counterclockwise direction, and supporting part 532 connects constriction in the lower end of constriction 531 531 are also set in accommodating space 513 in a counterclockwise direction.In this embodiment, the diameter of the constriction 531 of coil spring 53 Less than the diameter of supporting part 532, but not limited to this；In practice, according to the position of the abutment wall 512 of accommodating space 513, constriction Diameter also can be equal to or greater than supporting part diameter.

The right part and Figure 27 for please referring to Figure 25, when friction pulley 32 is rotated in a clockwise direction by the drive of drawstring, Because supporting part 532 supports for the abutment wall 512 in accommodating space 513, make coil spring 53 that can not rotate and move, at this time friction pulley 32 Rotation direction in contrast to constriction 531 around set direction, it will drive constriction 531 outward slightly distending and unclamp shaft 321, make friction pulley 32 can the rotation of relative restraint portion 531.Even if however, friction pulley 32 can relative restraint portion 531 rotate, at this time about Beam portion 531 still keeps the shaft 321 for being in close contact friction pulley 32, so that producing between constriction 531 and the shaft 321 of friction pulley 32 Raw first frictional resistance, and then inhibit the rotation of friction pulley 32, so that the rotation of friction pulley 32 is obstructed.

Conversely, when friction pulley 32 is rotated in a counterclockwise direction by the drive of drawstring, because friction pulley 32 rotation direction with The direction of its shaft 321 of 531 winding of constriction is identical, therefore the rotation of friction pulley 32 can promote the constriction 531 of coil spring 53 Tight beam both makes to relatively rotate in the shaft 321 of friction pulley 32, then friction pulley 32 can drive coil spring 53 synchronously with It rotates in an anti-clockwise direction.In this situation, the supporting part 532 of coil spring 53 rotates simultaneously swiping with the rotation of constriction 531 The abutment wall 512 of pedestal 51, and then coil spring 53 is made to generate the second frictional resistance to pedestal 51；Due to the contact of coil spring 53 Portion 532 is only the abutment wall 512 that slightly swiping crosses pedestal 51, therefore generated second frictional resistance is much smaller than above-mentioned first Frictional resistance.

It, may be because of underbeam when removing the external force for pulling underbeam 5 after the underbeam 5 of curtain without stretching wire 1 is pulled to designated position 5 are less than the backrush elastic force of scroll spring 37 with the weight pulling force of curtain 7, and underbeam 5 is made to go up upwards.At this point, scroll spring 37 Backrush elastic force can pull drawstring by reel 32, rotate drawstring drawing friction wheel 32 in a clockwise direction, rub simultaneously The rotation for wiping wheel 32 can drive the constriction 531 of coil spring 53 slightly to unclamp, and between coil spring 53 and friction pulley 32 Frictional resistance is generated to inhibit the rotation of friction pulley 32.Meanwhile the rotation of friction pulley 32 is suppressed tight beam will be made in friction The drawstring of wheel 32 is not easy that friction pulley 32 is driven to rotate, and then the movement of drawstring is made to be obstructed, and thus assists the weight of underbeam 5 and curtain 7 Amount pulling force contends with the backrush elastic force of scroll spring 17, so that underbeam 5 is stablized and rests on designated position.

In addition, in one embodiment, if the drawstring 2b for fourth embodiment of arranging in pairs or groups on the spring case 50 of the 5th embodiment Winding mode frictional resistance effect identical with fourth embodiment can be obtained then in the retracting of drawstring and during release.

When drawstring furl (or releasing) when, by the friction pulley in all embodiments of the utility model can by operatively with bias Part contact, and then so that bias piece is generated frictional resistance to friction pulley, and the thus weight of frictional resistance auxiliary underbeam and curtain The backrush elastic force of pulling force and scroll spring mutually contends with, so that the underbeam of curtain without stretching wire is able to after removing external force steadily Rest on designated position.Conversely, when drawstring releases (or retracting), design through this embodiment makes bias piece to friction pulley It generates lesser frictional resistance or does not generate frictional resistance, therefore can move underbeam relaxedly makes curtain that (or folding) be unfolded.

The foregoing is merely the preferable possible embodiments of the utility model, all application the utility model specifications and right Equivalence changes carried out by it is required that ought to be included in the scope of the patents of the utility model.

Claims (13)

1. a kind of resistance mechanism of curtain rope body, for generating resistance to a curtain rope body, the rope body with the folding of the curtain and It is mobile direction can be released with a retracting direction or one with being driven；It is characterized in that, the resistance mechanism includes:

One bias piece；And

One resistance assembly, the neighbouring rope body is arranged, and the section that the rope body corresponds to the resistance assembly is set around the resistance assembly, makes The resistance assembly synchronizes actuation with the movement of the rope body；The resistance assembly is equipped with the bias piece, and when the rope body with The retracting direction or this release direction it is mobile when, which inhibits the resistance assembly actuation, makes the resistance mechanism to the rope body Generate resistance；

When the rope body with the retracting direction when pulled, the bias piece to the resistance assembly generate one first frictional resistance；When this Rope body releases direction when pulled with this, which generates one second frictional resistance, and second friction to the resistance assembly Resistance is different from first frictional resistance.

2. the resistance mechanism of curtain rope body as described in claim 1, which is characterized in that the resistance assembly includes a resistance wheel, The rope body is set around the section tight beam of the resistance assembly in the resistance wheel, and the resistance wheel is made to be driven and be rotated by the rope body；When this When pulled with the retracting direction, which rotates rope body towards a first direction；It is pulled when the rope body releases direction with this When, which rotates towards a second direction, and the second direction is in contrast to the first direction.

3. the resistance mechanism of curtain rope body as claimed in claim 2, which is characterized in that the resistance assembly further comprises one Body, the resistance wheel and the bias piece are set on the pedestal, and the resistance wheel can be rotated relative to the pedestal.

4. the resistance mechanism of curtain rope body as claimed in claim 3, which is characterized in that the pedestal has an accommodating space, and The resistance wheel and the bias piece are set in the accommodating space.

5. the resistance mechanism of curtain rope body as claimed in claim 4, which is characterized in that the one of the bias piece and the accommodating space A wedge type region has been collectively formed in part abutment wall, which has a narrow side and a spacious side；The resistance wheel is movable Ground is set in the wedge type region, and can be by operatively moving between the narrow side and the spaciousness side.

6. the resistance mechanism of curtain rope body as claimed in claim 5, which is characterized in that when the rope body is drawn with the retracting direction When dynamic, which can be pulled by the rope body toward narrow side movement, and the resistance wheel is made to be pushed against by the bias piece and inhibit to turn It is dynamic, and then generate first frictional resistance；When the rope body releases direction when pulled with this, which can be pulled by the rope body And it is mobile toward the spaciousness side, the resistance wheel is optionally contacted with the bias piece at this time, and then generates second frictional resistance, And second frictional resistance is less than first frictional resistance.

7. the resistance mechanism of curtain rope body as claimed in claim 5, which is characterized in that when the rope body is drawn with the retracting direction When dynamic, which can be pulled by the rope body and be moved toward the spaciousness side, at this time the resistance wheel optionally with the bias piece Contact, and then generate first frictional resistance；When the rope body releases direction when pulled with this, which can be drawn by the rope body It is dynamic and mobile toward the narrow side, so that the resistance wheel is pushed against by the bias piece and is inhibited to rotate, and then generate second frictional resistance, And second frictional resistance is greater than first frictional resistance.

8. the resistance mechanism of curtain rope body as claimed in claim 5, which is characterized in that the bias piece has a bending segment close The narrow side in the wedge type region, when the resistance wheel is pulled by the rope body toward when narrow side movement, this of the bias piece is curved Trisection is pushed against in the resistance wheel, to inhibit the rotation of the resistance wheel, keeps the resistance wheel speed slack-off.

9. the resistance mechanism of curtain rope body as claimed in claim 5, which is characterized in that the bias piece has a supporting part, should Supporting part selectively connects any abutment wall for being butted on the accommodating space；The bias piece further includes a free end, the free end not position In the supporting part, and close to the spaciousness side in the wedge type region.

10. the resistance mechanism of curtain rope body as claimed in claim 4, which is characterized in that the bias piece includes connected one about Beam portion and a supporting part, the supporting part are resisted against an abutment wall of the accommodating space, and the constriction is by the drive of the supporting part, and Optionally the tight beam resistance wheel is so that the resistance wheel can not rotate relative to the constriction or unclamp the resistance wheel so that the resistance Wheels can be rotated relative to the constriction.

11. the resistance mechanism of curtain rope body as claimed in claim 10, which is characterized in that the constriction of the bias piece is at this Coiling direction on resistance wheel is identical around set direction on the resistance wheel as the rope body；When the rope body is drawn with the retracting direction When dynamic, which can be pulled by the rope body and be rotated towards the first direction, at this time because the supporting part of the bias piece support in The abutment wall move the bias piece can not, while the rotation of the resistance wheel can drive the constriction slightly to unclamp, and make the resistance wheel It can be rotated relative to the bias piece, the constriction generates first frictional resistance to the resistance wheel at this time, and then inhibits the resistance wheel Rotation；When the rope body releases direction when pulled with this, which can be pulled by the rope body and be rotated towards the second direction, At this time because the constriction tight beam makes the resistance wheel that the bias piece be driven to rotate together in the resistance wheel, while driving the bias piece The supporting part selectively rub the abutment wall of the pedestal, and then make the bias piece selectively to the pedestal generate this second Frictional resistance, and second frictional resistance is less than first frictional resistance.

12. the resistance mechanism of curtain rope body as claimed in claim 10, which is characterized in that the constriction of the bias piece is at this Coiling direction on resistance wheel is contrary with the winding of the rope body on the resistance wheel；When the rope body is drawn with the retracting direction When dynamic, which can be pulled by the rope body and be rotated towards the first direction, at this time because the bias piece tight beam is in the resistance wheel, be made The resistance wheel drives the bias piece to rotate together, at the same drive the supporting part of the bias piece selectively rub the pedestal should Abutment wall, and then the bias piece is made selectively to generate first frictional resistance to the pedestal；When the rope body releases direction quilt with this When pulling, which can be pulled by the rope body and be rotated towards the second direction, at this time because the supporting part of the bias piece supports It in the abutment wall, move the bias piece can not, while the rotation of the resistance wheel can drive the bias piece tight beam in the resistance wheel Part is slightly unclamped, and rotate the resistance wheel can relative to the bias piece, and the constriction generates this to the resistance wheel and second rubs at this time Resistance is wiped, and then inhibits the rotation of the resistance wheel, and second frictional resistance is greater than first frictional resistance.

13. the resistance mechanism of curtain rope body as claimed in claim 10, which is characterized in that the bias piece is a coil spring, The diameter of the constriction is less than the diameter of the supporting part.