CN2881049Y - Blind cord winding device with brake unit - Google Patents

Abstract

A rope rolling device of a blind with a brake unit can be arranged on the blind with an upper beam, a lower beam and a plurality of blades arranged between the upper beam and the lower beam, the rope rolling device comprises a seat body unit arranged on the upper beam, an elastic driving unit arranged on the seat body unit, at least one pull rope and a brake unit, the elastic driving unit is provided with a rope winding wheel and a rope winding device, two ends of the rope winding are respectively connected with the rope winding wheel and the lower beam, the brake unit has a brake wheel, a sliding groove, a limit pin, a sliding block set capable of moving in sequence among a first position, a second position, a third position and a fourth position, and a connecting rod with two ends respectively pivoted with the brake wheel and the sliding block set, the brake wheel is provided with a control guide groove and a brake part which can be contacted with the rope winding wheel, so as to achieve the purposes of convenient operation and product standardization.

Description

Blind cord winding device with brake unit

technical field

The utility model relates to a blind, in particular to a blind rope winding device with a braking unit.

Background technique

Existing shutters without exposed pull cords, such as U.S. Patent No. 6,079,471 and No. 6,289,965, generally use a spring motor to control most of the blades (head rail, bottom rail) between the upper and lower beams ( slats), the spring motor can use a variable force spring (variable force spring), or use a constant force spring (constant force spring) with a friction adjuster (friction adjuster) to balance the lower beam and stack on the lower beam The lower beam can be stopped at any height due to the weight of the upper blades. However, since the shutters must be designed to match the actual window size, the shutters will have various specifications of different lengths and widths. In other words, The weights of the lower beams and stacked blades of different specifications of blinds will also be different, so the spring motors of different specifications of blinds also need to be equipped with springs with different spring springs to match the lower beams and blades of different specifications and weights. , not only is it troublesome, for example, equal-force springs with different rewind elastic forces may need to be equipped with friction adjustment devices with different friction forces to balance the lower beams and blades with different weights, and it will also cause the spring motor to be unable to standardize the amount Produce.

As shown in Figures 1 and 2, it is another existing shutter (US Patent No. 6,024,154) without exposed stay cords. A winding assembly 5, and a positioning assembly 6. The winding assembly 5 has a housing 501 installed in the lower beam 2, two rope-receiving members 502 rotatably installed in the housing 501, and two rope-receiving members 502 and The volute spring 503 between the housings 501, the rope receiving member 502 respectively has a take-up portion 504 for the pull cord 4 to be wound, and a continuous tooth-shaped locking portion 505, the positioning The assembly 6 has a locking member 601, and a number of springs 602 abutted between the housing 501 and the locking member 601. The locking member 601 has two racks that can engage with the locking portion 505 respectively. Section 603.

In this way, when the user wants to retract the blade 3, he can press the locking part 601, so that the rack part 603 is separated from the locking part 505. At this time, if the user pushes up the locking part 505 The lower beam 2, the rewinding force of the scroll spring 503 can drive the rope receiving member 502 to retract the stay rope 4, and the blade 3 can be stacked on the lower beam 2, on the contrary, If the user pulls down the lower beam 2, the rope receiving member 502 can be forced to release the stay rope 4, and the blade 3 can be extended downward. When the lower beam 2 moves to any height, the or release the locking member 601, and reset the rack portion 603 to engage with the locking portion 505, thereby stopping the rotation of the rope receiving member 502, so that the lower beam 2 can stop at any height.

Although this kind of shutter can control the rotation of the rope receiving member 502 by the positioning assembly 6, so that the rope receiving assembly 5 can be applied to shutters of different specifications without replacing the scroll spring 503, but, In actual use, this kind of shutter has the following deficiencies:

1. As shown in Figures 2 and 3, since the rope-receiving component 5 and the positioning component 6 are arranged in the center of the lower beam 2, and in fact, the user is only suitable for pressing the latch with one hand 601, and push up or pull down the lower beam 2, therefore, the lower beam 2 is very likely to be held unbalanced by the user, causing the rope receiving member 502 to fail to retract the pull cord 4 synchronously, thereby causing the The lower beam 2 is skewed.

2. As shown in Figures 2 and 3, since the bottom ends of the stay cords 4 are respectively wound on the cord receiving members 502, once the lower beam 2 is skewed as shown in Figure 3, The user must first press the locking part 601 with one hand, and then forcefully pull down the high-sloping end of the lower beam 2 with the other hand, so that the lower beam 2 can be moved to a nearly horizontal state. In this way, not only the operation is troublesome, but also It is more likely that the user will have to go through several adjustments before the lower beam 2 can really be moved to a horizontal state.

Utility model content

The purpose of the utility model is to provide a shutter rope winding device with brake unit which is easy to operate and is applicable to shutters of different specifications.

The blinds rope winding device with brake unit of the utility model can be installed on the blinds. The blinds have an upper beam, a lower beam, and a plurality of blades arranged between the upper and lower beams. The rope winding device includes A body unit, an elastic drive unit, at least one pull rope, and a brake unit. The base unit is arranged on one of the upper and lower beams, and the base unit has a supporting surface. The elastic driving unit is installed on the base unit, and has at least one rotatable rope winding wheel, and a rope winding device that can drive the rope winding wheel to rotate. The pull cord has a first end connected to the rope take-up wheel, and a second end connected to the other of the upper and lower beams through the blade. The brake unit has a brake wheel that is rotatably installed on the bearing surface, a chute that is arranged on the bearing surface along the radial direction of the brake wheel corresponding to the brake wheel, and a movably mounted on the bearing surface. The limit pin in the chute is movably installed on the supporting surface along an axial direction and can be positioned between a first position, a second position, a third position and a fourth position A slider group that moves sequentially, and a connecting rod that is pivotally connected to the brake wheel and the slider group at both ends, and the brake wheel can rotate in a first direction and a second direction opposite to the first direction. , the brake wheel has a control guide groove, and a brake portion that can contact with one of the rope winding wheel and the rope reel, the control guide groove has an arc portion substantially arranged along the circumferential direction, a A first stop part communicating with the arc part and closer to the brake part than the arc part in the first direction, a first stop part communicating with the first stop part and closer to the second stop part in the second direction A stopper part away from the second stopper part of the brake part, and a second stopper part connected between the arc part and the second stopper part and closer to the brake part than the second stopper part in the first direction The third stop part of the part, the limit pin has a limit part extending into the control guide groove, the slider group has a clamping part that rubs against the pull cord, and the clamp part and the pull cord The friction force generated between them can make the pull cord drive the slider group along the axial direction. When the rope reel drives the rope winding wheel, the slider group moves from the first position to the second position through the pull cord. position, the connecting rod can drive the brake wheel to rotate along the first direction until the first stop part is stopped by the limit part, so that the brake part is detached from one of the rope winding wheel and the rope winding device. Or, when the pull cord drives the slider group to move from the second position to the third position, the connecting rod can drive the brake wheel to rotate in the second direction until the second stopper is locked by the limiter. Blocking, when the rope reel drives the rope take-up wheel to move the slider group from the third position to the fourth position through the pull cord, the connecting rod can drive the brake wheel to rotate along the first direction to The third stop part is stopped by the limit part, and when the pull cord drives the slider group to move from the fourth position to the first position, the connecting rod can drive the brake wheel to rotate in the second direction Until the arc part slides with the limiting part, and makes the brake part contact with one of the rope reel and the rope reel, and stops the rope reel from driving the rope reel.

Thereby, the utility model utilizes the setting of the brake unit, which not only facilitates the user's operation, but also enables standardized mass production and is suitable for blinds of different specifications.

The blind cord winding device with brake unit of the present utility model will be described in detail below through the best embodiment and accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the appearance of an existing blind with no exposed drawstring;

Fig. 2 is the sectional schematic diagram of 2-2 section line in Fig. 1;

Fig. 3 is a view similar to Fig. 1, illustrating that the lower beam of the louver is skewed;

Fig. 4 is a partial cross-sectional schematic diagram of a preferred embodiment of the shutter rope winding device with a brake unit installed on the shutter of the present invention;

Figure 5 is an exploded perspective view of the preferred embodiment;

Fig. 6 is a schematic top view of a brake wheel of a brake unit of the preferred embodiment;

Fig. 7 is a schematic cross-sectional view of section line 7-7 in Fig. 4, illustrating that a slider group of the braking unit is in a first position;

Fig. 8 is a schematic cross-sectional view of the lower beam of the louver;

Fig. 9 is a view similar to Fig. 4, illustrating that the user slightly pushes up the lower beam;

Fig. 10 is a schematic cross-sectional view of the 10-10 section line in Fig. 9, illustrating that the slider group is moved to the right to a second position;

Figure 11 is a view similar to Figure 4, illustrating that the user pulls down the lower beam to the bottom end

Fig. 12 is a schematic cross-sectional view of the section line 12-12 in Fig. 11, illustrating that the slider group moves to the left to a third position;

Figure 13 is a view similar to Figure 11, illustrating that the user slightly pushes up the lower beam;

Fig. 14 is a schematic cross-sectional view of the section line 14-14 in Fig. 13, illustrating that the slider group is moved to the right to a fourth position;

Fig. 15 is a view similar to Fig. 11, illustrating that the user slightly pulls down the lower beam;

Fig. 16 is a schematic cross-sectional view of section line 16-16 in Fig. 15, illustrating that the slider group moves to the left to the first position;

Fig. 17 is a view similar to Fig. 15, illustrating that the user pushes up and lowers the inclined end of the lower beam, so that the lower beam can naturally move to a horizontal state.

Detailed ways

The aforementioned and other technical contents, features and effects of the present utility model will be clearly understood in the detailed description of a preferred embodiment with reference to the following accompanying drawings.

Referring to Figures 4 and 8, a preferred embodiment of the blind cord winding device with a brake unit of the present invention can be installed on a blind, and the blind has an upper window that can be erected on a window (not shown). Beam 200, a lower beam 300 opposite to the upper beam 200, a plurality of blades 400 arranged between the upper and lower beams 200, 300, and two stay rope balance guide seats installed in the lower beam 300 at intervals 500, the balance guide seat 500 has a guide hole 510 respectively. In addition, in the drawing of this embodiment, in order to simplify the drawing, the ladder string (ladder string) used to suspend each blade 400 of the general shutter is omitted. , without drawing, which is specially explained here.

As shown in FIGS. 5 , 6 , 7 , and 8 , the rope winding device 100 includes: a base unit 10 , an elastic drive unit 20 , two pull cords 30 , and a brake unit 40 .

The seat unit 10 is installed in the upper beam 200 , and the seat unit 10 is hollow and has a supporting surface 11 .

The elastic driving unit 20 is installed on the base unit 10 . The elastic force driving unit 20 has two rope winding wheels 21 rotatably mounted on the supporting surface 11, and a winding rope mounted between the rope winding wheels 21 and capable of driving the rope winding wheels 21 to rotate. Rope device 22.

The rope winding wheels 21 respectively have a toothed disc 211 formed with a plurality of teeth arranged along the circumferential direction, and a winding hub 212 arranged on the toothed disc 23 .

The rope reel 22 has a driving wheel 23 rotatably mounted on the supporting surface 11, a retracting wheel 24 rotatably mounted on the supporting surface 11, and a driving wheel 24 mounted on the driving surface 11. The scroll spring 25 between the wheel 23 and the take-up wheel 24. The drive wheel 22 has a drive toothed disc 231 that is engaged with the toothed disc 211 of the left side winding wheel 21, and a winding hub 232 that is arranged on the drive toothed disc 231. The toothed disc 231 and the toothed disc 211 of the right side winding wheel 21 engage the winding toothed disc 241, and a winding hub 242 arranged on the retracted toothed disc 241, one end of the scroll spring 25 is installed on On the winding hub 232 , the other end of the scroll spring 25 is sheathed on the winding hub 242 .

The stay cords 30 respectively have a first end portion 31 connected to the winding hub 212 of the rope winding wheel 21 , and a second end portion passing through the blade 400 to be connected to the lower beam 300 32. In this embodiment, the second ends 32 of the pull cords 30 respectively pass through the guide holes 510 of the balance guide base 500 to be connected together.

The brake unit 40 has a brake wheel 41 rotatably mounted on the bearing surface 11 , and a slide groove 42 corresponding to the brake wheel 41 and arranged on the bearing surface 11 along the radial direction of the brake wheel 41 , a limit pin 43 movably installed in the sliding groove 42, a movably installed on the supporting surface 11 along an axial direction x and can be in a first position (see Figure 7), a The slide block group 44 that moves sequentially between the second position (seeing Fig. 10), a third position (seeing Fig. 12) and a fourth position (seeing Fig. 14), and one two ends are connected with the brake wheel 41 and the brake wheel 41 respectively. The slider group 44 is pivotally connected to the connecting rod 45 .

The brake wheel 41 can rotate along a first direction θ1 and a second direction θ2 opposite to the first direction θ1. The brake wheel 41 has a control guide groove 411 recessed on the bottom surface, and a The brake portion 416 is in contact with the chainring 211 of the side winding sheave 21 .

The control guide groove 411 has an arc portion 412 substantially disposed along the circumferential direction, a first stop portion 416 that communicates with the arc portion 411 and is closer to the brake portion 416 than the arc portion 412 in the first direction θ1. Stopper 413, a second stopper 414 that communicates with the first stopper 413 and is farther away from the brake part 416 than the first stopper 413 in the second direction θ2, and a second stopper 414 that communicates with the first stopper 413. Between the arc portion 412 and the second stop portion 414 and in the first direction θ1 is a third stop portion 415 that is closer to the brake portion 416 than the second stop portion 414. In this embodiment, A first radius of rotation R1 can be defined radially between the arc portion 412 and the center of rotation of the brake wheel 41 , and can be defined radially between the first stop portion 413 and the center of rotation of the brake wheel 41 A second radius of rotation R2 smaller than the first radius of rotation R1 is defined, and a third radius smaller than the second radius of rotation R2 can be defined between the second stopper 414 and the center of rotation of the brake wheel 41 in the radial direction. The radius of rotation R3, a fourth radius of rotation R4 smaller than the third radius of rotation R3 may be defined radially between the third stop portion 415 and the center of rotation of the brake wheel 41 .

The brake part 416 has several brake gear teeth 417 arranged in the circumferential direction. When the slider group 44 moves from the fourth position (see FIG. 14) to the first position (see FIG. 7), the brake gear teeth 417 is engaged with the toothed disc 211 of the left side rope winding wheel 21, and can stop the drive wheel 23 and the winding wheel 24 from driving the rope winding wheel 21.

The limiting pin 43 has a limiting portion 431 extending into the control guide groove 411 .

The slider set 44 has a hollow slider 441 and a clamping portion 442 disposed in the slider 441 and capable of friction with the left pull cord 30 . The clamping portion 442 has two reeds 443 oppositely arranged in the slider 441 , the left pull cord 30 passes through the slider 441 along the axial direction x, and passes between the reeds 443 , and is connected with the slider 443 The reeds 443 rub against each other, and the friction generated between the reeds 443 and the left pull cord 30 can make the left pull cord 30 drive the slider set 44 along the axial direction x.

Both ends of the connecting rod 45 are pivotally connected to the brake wheel 41 and the sliding block 441 respectively.

As shown in Figures 4 and 7, when the slider set 44 is in the first position, the limit portion 431 of the limit pin 43 is in the arc portion 412 of the control guide groove 411, and the brake portion 416 The brake wheel tooth 417 is engaged with the toothed plate 211 of the left side rope winding wheel 21, and can stop the left side rope winding wheel 21 from rotating. Therefore, the drive wheel 23, the winding wheel 24 and the right side rope winding wheel 21 will also be locked together and cannot rotate, so the lower beam 300 will stop at a certain height.

When the user intends to pull down the lower beam 300 to the bottom end so that all the blades 400 are deployed downward, first, as shown in Figures 9 and 10, the user can use both hands to push the lower beam 300 slightly upwards. , the pushing force of the user will temporarily offset the weight of the lower beam 300 and the blade 400 carried thereon, therefore, the rewinding force of the scroll spring 25 can drive the driving wheel 23 to rotate around the first direction θ1, Then drive the left side rope winding wheel 21 to rotate around the second direction θ2 and drive the right side rope winding wheel 21 to rotate around the first direction θ1 through the winding wheel 24, so that the stay cord 30 will be pulled inward synchronously And be wound on described rope winding wheel 21, then when left side rope winding wheel 21 drives this slide block group 44 to move rightward to this second position from this first position (see Fig. 7) through left side stay cord 30 , the connecting rod 45 can drive the brake wheel 41 to rotate along the first direction θ1 until the first stop part 413 is stopped by the limit part 431, so that the brake wheel teeth 417 are detached from the left rope winding wheel 21, the toothed disc 211, at this time, the left side rope winding wheel 21 is no longer blocked; then, as shown in Figures 11 and 12, the user can use both hands to pull the lower beam 300 down to the bottom end, In this process, at the beginning, the pull cord 30 will be pulled out synchronously to drive the left and right side rope winding wheels 21 to rotate around the first and second directions θ1 and θ2 respectively, and then drive the driving wheel 23 and the winding wheel The take-up wheel 24 rotates around the second and first directions θ2 and θ1 respectively, so that the scroll spring 25 is wound on the take-up wheel 24. In addition, when the left pull cord 30 is pulled out, the slider group is driven 44 moves leftward from the second position (see FIG. 10 ) to the third position, the connecting rod 45 can drive the brake wheel 41 to rotate along the second direction θ2 until the second stopper 414 is limited by the part 431, that is to say, the slider group 44 will stop moving to the left, and the pull cord 30 can be continuously pulled out; then, as shown in Figures 13 and 14, the user can use both hands to pull The lower beam 300 is slightly pushed upwards. At this time, the rewinding force of the scroll spring 25 can drive the driving wheel 23 to rotate around the first direction θ1, and then drive the left and right rope winding wheels 21 to respectively rotate around the first direction θ1. 2. Rotate in one direction θ2 and θ1, so that the stay cord 30 will be pulled inward synchronously and wound on the rope winding wheel 21, then when the left rope winding wheel 21 passes through the left stay rope 30 When driving the slider group 44 to move rightward from the third position (see FIG. 12 ) to the fourth position, the connecting rod 45 can drive the brake wheel 41 to rotate along the first direction θ1 to the third stopper 415 is stopped by the limiting portion 431; finally, as shown in Figures 15 and 16, the user can use both hands to pull the lower beam 300 slightly downwards. The pull cord 30 is driven to rotate around the first and second directions θ1 and θ2 respectively, and the driving wheel 23 and the take-up wheel 24 are also driven to rotate around the second and first directions θ2 and θ1 respectively, then, When the left pull cord 30 drives the slider group 44 to move leftward from the fourth position (see FIG. 14 ) to the first position, the connecting rod 45 can drive the brake wheel 41 to rotate along the second direction θ2 to The arc portion 412 is in sliding contact with the limiting portion 431, and the brake wheel teeth 417 are meshed with the toothed plate 211 of the left side rope winding wheel 21 again, and the left side rope winding wheel 21 is prevented from rotating again. , the lower beam 300 will stop at the bottom end and no longer move.

In this way, through the above-mentioned operation process, the user can make the lower beam 300 move down and stop at any height. Similarly, through a similar operation process as above, for example, first push up and pull down the lower beam 300 continuously, Then the lower beam 300 is pushed up to any height, and finally the lower beam 300 is slightly pulled down. The user can also make the lower beam 300 move up and stop at any height.

In addition, as shown in FIG. 17 , when the user accidentally tilts the lower beam 300 , since the second ends 32 of the pull cords 30 respectively pass through the guide holes 510 of the balance guide base 500 , they are connected. Together, therefore, the lower beam 300 can move freely relative to the stay cord 30 through the guide hole 510, therefore, as long as the user pushes up the downward-sloping end of the lower beam 300 and puts it down again, the Due to the action of gravity, the lower beam 300 can move relative to the stay rope 30 to a horizontal state as shown in FIG. 15 , and redistribute the position of the stay rope 30 relative to the lower beam 300 to a balanced state.

Through the above description, the advantages of the present utility model can be summarized as follows:

1. The utility model does not simply use the scroll spring to balance the weight of the lower beam and the stacked blades as in the prior art, so that the lower beam can be stopped at any height. On the contrary, the utility model utilizes the upper Push or pull down the lower beam 300 to drive the brake unit 40 to control the rotation of the rope take-up wheel 21, the drive wheel 23 and the take-up wheel 24, so that the lower beam 300 can be stopped at any height, so In fact, the scroll spring 25 of the utility model only needs to have the rewinding force that can push the rope winding wheel 21 to wind the stay cord 30. Therefore, the utility model can be applied without replacing the scroll spring 25 For blinds of different specifications, it can help the industry to carry out unified standardized mass production.

2. The user can use both hands to push up or pull down the lower beam 300 to drive the brake unit 40 to control the rope winding wheel 21 to synchronously wind up the pull cord 30. Therefore, compared with the prior art, the lower beam 300 It is less likely to cause the rope winding wheel 21 to fail to retract the stay rope 30 synchronously due to the unbalanced grip of the user, thereby causing the lower beam 300 to be skewed. In this way, the utility model not only facilitates the user operation, and has good operability, and can effectively avoid the problem of skewing of the lower beam 300 .

3. Since the second ends 32 of the pull cords 30 of the present invention pass through the guide holes 510 of the balance guide seat 500 respectively and are connected together, the lower beam 300 is connected together through the guide holes 510 It can move freely relative to the stay cord 30. In this way, when the user accidentally tilts the lower beam 300, as long as the user pushes up the downward-sloping end of the lower beam 300 and then puts it down, the force of gravity will , the lower beam 300 can be easily moved naturally relative to the stay cord 30 to a horizontal state.

To sum up, the shutter rope winding device with brake unit of the present invention is not only easy to operate, but also can be mass-produced and suitable for blinds of different specifications, and the user can easily adjust the horizontal state of the lower beam , so the purpose of the invention can indeed be achieved.

The content disclosed above is only a preferred embodiment of the utility model, and the scope of implementation of the utility model cannot be limited with this, that is, all simple equivalent changes made according to the patent scope of the utility model and the description content of the utility model and modifications, still all belong to the scope covered by the utility model patent claims.

Claims (8)

1. the shutter cord winder with brake units is installed on the shutter, and this shutter has a upper beam, a underbeam, and a plurality of blades that are arranged between this upper and lower beam, it is characterized in that:

This cord winder comprises:

One pedestal unit is arranged on one of them of this upper and lower beam, and described pedestal unit has a supporting face;

One elastic force driver element is installed on the described pedestal unit, has at least one bull wheel, and one drives the ropewinder that this bull wheel rotates;

At least one stay cord has a first end that is connected with described bull wheel, and one passes described blade and the second end that is connected with another person of this upper and lower beam; And

One brake units, has a brake wheel that is installed on the described supporting face, one corresponding described brake wheel and radially be arranged at chute on the described supporting face along described brake wheel, one is installed in the spacer pin in the described chute, one axially is installed on the described supporting face and in a primary importance along one, one second place, the slide block group that moves in regular turn between one the 3rd position and one the 4th position, and the connecting rod that articulates with described brake wheel and described slide block group respectively of two ends, described brake wheel is along a first direction, reach a second direction rotation in contrast to described first direction, described brake wheel has a control guide groove, and one with described bull wheel, the wherein brake portion of contacts of described ropewinder, described control guide groove has a curved portions that in fact along the circumferential direction is provided with, one is communicated with described curved portions and is first stop section of more described curved portions near this brake portion on described first direction, one is communicated with described first stop section and is second stop section of more described first stop section away from this brake portion on this second direction, and one be communicated between described curved portions and this second stop section and be the 3rd stop section than close this brake portion in this second stop section on this first direction, described spacer pin has a limiting section that extends in the described control guide groove, described slide block group have one with the clamping part of this stay cord friction, when driving this bull wheel, described ropewinder drives this slide block group when described primary importance moves to the described second place through this stay cord, described connecting rod drives described brake wheel and turns to this first stop section by this limiting section block along this first direction, and make described brake portion break away from described bull wheel, wherein one of described ropewinder, when described stay cord drives described slide block group when this second place moves to the 3rd position, described connecting rod drives described brake wheel and turns to this second stop section by described limiting section block along this second direction, when driving described bull wheel, described ropewinder drives this slide block group when the 3rd position moves to the 4th position through described stay cord, described connecting rod drives described brake wheel and turns to the 3rd stop section by described limiting section block along this first direction, when described stay cord drives described slide block group when the 4th position moves to this primary importance, described connecting rod drives described brake wheel and turns to described curved portions and described limiting section slips along this second direction, and make described brake portion and described bull wheel, wherein contacts of described ropewinder end described ropewinder and drive described bull wheel and pull.

2. the shutter cord winder of tool brake units as claimed in claim 1 is characterized in that:

Described elastic force driver element has two bull wheels that are installed on the described supporting face, described ropewinder is to be installed between the described bull wheel, described bull wheel has a fluted disc respectively, described ropewinder has one and is installed in driving wheel, on the described supporting face and is installed in the wheel that furls on the described supporting face, reach one and be installed in described driving wheel and the described scroll spring that furls between the wheel, described driving wheel have one with the driving fluted disc of the fluted disc engagement of a bull wheel wherein, described furl wheel have one with the fluted disc that furls of the fluted disc engagement of described driving fluted disc and another bull wheel.

3. the shutter cord winder of tool brake units as claimed in claim 2 is characterized in that:

Described bull wheel has a coiling hub that is arranged on the described fluted disc more respectively, described cord winder comprises two stay cords, the first end of described stay cord is to be connected with the coiling hub of described bull wheel respectively, the second end of described stay cord is to pass described blade respectively and be connected with another person of this upper and lower beam, and wherein a stay cord is that clamping part with described slide block group rubs mutually.

4. the shutter cord winder of tool brake units as claimed in claim 3 is characterized in that:

The brake portion of described brake wheel has a plurality of brake gear teeth that along the circumferential direction are provided with, when described slide block group when described the 4th position moves to described primary importance, the brake gear teeth of described brake portion are and the wherein fluted disc engagement of a bull wheel, end described ropewinder and drive described bull wheel and pull.

5. the shutter cord winder of tool brake units as claimed in claim 4 is characterized in that:

Described slide block group has more a slide block, described clamping part has two reeds that are arranged at relatively in the described slide block, wherein a stay cord axially runs through this slide block along this, and pass between the described reed, and rub mutually with described reed, the two ends of described connecting rod are to articulate with described brake wheel and described slide block respectively.

6. the shutter cord winder of tool brake units as claimed in claim 1 is characterized in that:

Described curved portions radially defines one first radius of gyration between the center of rotation of described brake wheel, described first stop section radially defines second radius of gyration less than this first radius of gyration between the center of rotation of described brake wheel, described second stop section radially defines the 3rd radius of gyration less than this second radius of gyration between the center of rotation of described brake wheel, and described the 3rd stop section radially defines the 4th radius of gyration less than the 3rd radius of gyration between the center of rotation of described brake wheel.

7. the shutter cord winder of tool brake units as claimed in claim 3 is characterized in that:

Described pedestal unit is to be arranged on the described upper beam, and the second end of described stay cord is to pass described blade respectively and be connected with described underbeam.

8. the shutter cord winder of tool brake units as claimed in claim 7 is characterized in that:

The second end of described stay cord is to be connected to each other.

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