CN2648030Y

CN2648030Y - Buffer device for rolling screen

Info

Publication number: CN2648030Y
Application number: CN 03206482
Authority: CN
Inventors: 范富美
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-28
Filing date: 2003-07-28
Publication date: 2004-10-13
Anticipated expiration: 2013-07-28

Abstract

The utility model discloses a rolling curtain buffer device, which is arranged in a rolling shaft of a rolling curtain, the buffer device comprises an outer shell, a clutch mechanism which is arranged in the outer shell and can be transformed between a joint position and a disengaged position. a drive shaft which passes through the outer shell and can generate the linked relationship with the clutch mechanism, one end of the drive shaft is extended out of the outer shell and is fixedly connected with a rotating tray, the rotating tray can be linked with the rolling shaft to drive the rotation of the drive shaft and drive the clutch mechanism to actuate. When the rolling shaft is rotated clockwise and the window curtain is down, the clutch mechanism is transformed from the joint position to the disengaged position, when the rolling shaft releases the window curtain, the utility model can not have the damping phenomenon. When the rolling shaft is rotated counter-clockwise and the curtain is rolled up, and when the curtain is rolled up to leave the proper length, the clutch mechanism is transformed from the disengaged position to the joint position, the rotating tray can actuate a damping mechanism to generate the damping, thus, the utility model can provide a buffer function when the rolling shaft rolls up the curtain.

Description

The buffer of roller shutter

Technical field

The utility model relates to a kind of curtain, specifically about a kind of buffer that is installed in the roller shutter, makes roller shutter that one cushioning effect is provided when rollback casement curtain.

Background technology

The structure of roller shutter mainly comprises: a rotating spool, and be wound in casement curtain on the described spool, spool is inner also to be provided with the furling mechanism that a location mechanism and has torque spring.The user drives spool forward rotation (for example counterclockwise rotating) during with cloth curtain pulled down, and the cloth curtain is discharged on spool.In the process of lowering cloth curtain, the rotation that detent mechanism can't the overslaugh spool, and spool is in the forward rotation process, and furling mechanism stores an elastic energy.

When stopping drag the cloth curtain, spool will be subjected to the driving of furling mechanism and desire produces backward rotation (for example clockwise direction rotation), and described detent mechanism will produce a location and act on this moment, spool can't be rotated, so can make the cloth curtain remain in the height of institute's lowering.

When desiring to furl the cloth curtain, the user is again with cloth curtain pulled down slightly, make spool forward rotation slightly, at this moment, the rotational action of spool will drive detent mechanism, and remove the positioning states of detent mechanism, at this moment, spool is rotatable freely, and described furling mechanism can drive the spool backward rotation, and then furls the cloth curtain.

As shown in the above description, when desiring to furl the cloth curtain of roller shutter, drive the spool backward rotation, use furling the cloth curtain by furling mechanism.But, when the torque spring in the furling mechanism discharges its elastic energy, cause the spool quick rotation easily, produce the quick impulse force when furling the cloth curtain, thus in the spool of roller shutter, promptly a buffer must be set, to slow down the speed that furls of roller shutter.

Summary of the invention

Main purpose of the present utility model is to provide a kind of buffer of roller shutter, and when making the spool of roller shutter furl the cloth curtain to final stage, the scrolling speed that can slow down spool is to avoid furling the impact force of cloth curtain.

Concrete structure of the present utility model is:

A kind of buffer of roller shutter is located in the spool of roller shutter, and a cushioning effect is provided when spool furls the casement curtain; Described buffer includes:

One shell, a longitudinal bodies, it is parallel to the axial of spool, and described shell is established one first room in the inside of right-hand member;

One clutch is located in described first room, and can conversion between a bonding station and a disengaging configuration; Described clutch can be in vertical top offset of described shell between described two positions during conversion;

One driving shaft penetrates in described shell, and can be along the length travel of shell, and its left end protrudes out the left end of described shell;

One reducing gear is located in described first room, between described clutch and described driving shaft; The inner of described driving shaft is connected in described reducing gear left end; The right-hand member of described reducing gear is connected in described clutch left end; Described driving shaft drives described clutch via the decelerating effect of described reducing gear and produces start, and described driving wheel can with described clutch synchronous shift;

One flexible member is located in the described shell, and its elastic energy mainly acts on described clutch, and when clutch was positioned at described bonding station, described flexible member made described clutch and driving shaft toward the displacement of described shell right-hand member;

One in order to produce the damping mechanism of damping action, is located at the left end of described shell;

One can produce the unidirectional driving member of effect of unidirectional transmission, is connected in described damping mechanism;

One is fixed in described driving shaft outer end, the inner peripheral surface interlocking of periphery and described spool, can rotate to turn described driving shaft with described spool, and can be subjected to described driving shaft interlock and along the axial displacement of spool, and when described clutch is positioned at described bonding station, can drive described unidirectional driving member, and when driving described unidirectional driving member forward rotation, described unidirectional driving member can't produce gearing, so the rolling disc that described damping mechanism is activated.

When described rolling disc during along with the spool forward rotation, this clutch is subjected to interlock, and is converted into its disengaging configuration by this bonding station, at this moment, this clutch drives this driving shaft and this rolling disc toward the displacement of shell left end, and when this disengaging configuration, this rolling disc can't this unidirectional driving member of interlock; By this, spool forward rotation and when discharging the casement curtain can't this damping mechanism of start; Spool backward rotation and when furling the cloth curtain, when the cloth curtain is furled surplus suitable length, this clutch is transformed into bonding station by this disengaging configuration, but this unidirectional driving member of this rolling disc interlock, and this unidirectional driving member backward rotation of drive, and then this damping mechanism generation damping of start, to slow down the rotating speed of spool.

For the effect of further understanding the purpose of this utility model, feature and being reached, below enumerate the utility model one preferred embodiment, and conjunction with figs. is elaborated, wherein:

Description of drawings

Fig. 1: show that the utility model is installed in the interior schematic diagram of spool of a roller shutter.

Fig. 2: the utility model one preferred embodiment face part sectioned view.

Fig. 3 to Fig. 6: the view of shell of the present utility model.

Fig. 7 to Figure 10: the view of the part that is coupling of the present utility model.

Figure 11 to Figure 14: the view of clutch part of the present utility model.

Figure 15: the sectional view of reducing gear of the present utility model.

Figure 16 to Figure 27: the view of the associated components of train of reduction gears, wherein, Figure 25 is the sectional drawing of the 25-25 hatching line of Figure 15.

Figure 28 to Figure 30: the view of driving shaft of the present utility model.

Figure 31: the sectional drawing that is the 31-31 hatching line of Fig. 2.

Figure 32 to Figure 34: the view of control member of the present utility model.

Figure 35 to Figure 40: the view of interlock cover of the present utility model.

Figure 41 to Figure 43: the view of rolling disc of the present utility model.

Figure 44: the schematic diagram that shows the clutch part and the relativeness of part when bonding station that be coupling.

The expansion schematic diagram of Figure 45: Figure 44.

Figure 46: show the expanded view when clutch part enters a disengaging configuration.

Figure 47: roughly identical with Fig. 2, the state when the display buffer device is positioned at disengaging configuration.

Figure 48: show the expanded view that clutch part is advanced in breaking away from stroke.

The specific embodiment

At first referring to Fig. 1, buffer 20 provided by the utility model is installed in the spool 12 of a roller shutter 10.Fig. 1 only shows the right-hand part of roller shutter, and omit its left side.

Described roller shutter has the extremity piece 15 (extremity piece that only shows the right side among the figure) that rail 14 and two on is located at rail two ends respectively.Spool 12 is located at 15 of described two extremity pieces, and rotatable.Buffer 20 provided by the utility model is installed in the spool, can produce specific action along with rotating forward or backwards of spool.In addition, (part of not showing among Fig. 1) installing one has the furling mechanism (not shown) of torque spring in the left side of spool 12, when discharging the casement curtain 16 that is wound on the spool side face, the number of turns of reversing of the torque spring in the furling mechanism is increased, and store an elastic energy when the spool forward rotation.Described furling mechanism is a known member, repeats no more.

The buffer 20 that the utility model one preferred embodiment is provided is connected in a location mechanism 17, described the two 20,17 be installed in simultaneously in the described spool 12.Detent mechanism 17 also is a known member, cooperate and consult Fig. 2, have one 18 and one and be sheathed on described axle 18 and rotating stack shell 19, stack shell 19 outer peripheral faces are provided with rib 191, with the set rib 121 of spool 12 inner peripheral surfaces inlay card mutually, make the stack shell of spool and detent mechanism to rotate synchronously.Be provided with a clip assembly (not shown) in described

stack shell

19 and 18 on axle, the user spurs cloth curtain 16 and when driving spool and rotating, described stack shell 19 can drive described clip assembly along with the rotation of spool, make the clip assembly in the clip state and remove between the clip state repeatedly start, when the clip state, stack shell 19 can't rotate; When free state (when the clip state is removed), stack shell can rotate on described axle 18.Its operating state will illustrate along with user mode of the present utility model.One end 181 of the axle 18 of described detent mechanism 17 is plugged in the extremity piece 15 on right side and can't rotates.

Described buffer 20 includes:

One shell 30 to shown in Figure 6, is microscler tubular as Fig. 3, its two end respectively has an

axial room

32,34, be communicated with an axis hole 35 between described two rooms, extend a central siphon 36 left from the peritreme of described axis hole again, described central siphon also protrudes out shell left end predetermined length.Described shell is located in the described spool 12, its axially parallel vertical and spool.

One clutch (A) comprising: be coupling a part and a clutch part.Wherein:

The part 40 that is coupling as Fig. 7 to Figure 10, has a dish portion 42, and the biend of disk body is established a joint 44 and an axial region 46 respectively, in the end face that is provided with described axial region 46 and establish the arc-shaped cam portions 48 that a radian is not more than 180 degree.Described cam part 48 is concentric circles with described axial region 46.The part 40 that is coupling is covered on the right-hand member of shell 30 with described dish portion 42, and as Fig. 2, the portion that buckles 43 in the dish portion 42 is buckled in the button hole 31 of body 30 right-hand members and fixes.Described joint 44 is positioned at outside the shell 30; And axial region 46 and cam part 48 are arranged in first room 32 of shell.

Described clutch part 50, as Figure 11 to Figure 14, the right side of its dish portion 52 is provided with one and connects hole 53 and and be positioned at described second cam part 54 that periphery, hole and radian are not more than 180 degree that connect, and a joint 55 is established in the left side of dish portion 52, and the free end of joint is also established a non-circular hole 56 that connects.Connect hole 56, hole portion 53 and cam part 54 and be concentric.Described clutch part 50 places in first room 32 of shell, and pegs graft with the axial region 46 that connects hole 53 right-hand members and the described part 40 that is coupling, and described two

cam part

54,48 in opposite directions.The be coupling axial region 46 of part 40 of described clutch part rotates for the center, also must be in the axial slip of described axial region 46.

The jack 45 of the axle 18 of detent mechanism 17 and the joint 44 of the part that is coupling as Fig. 2, makes buffer 20 be connected with detent mechanism with a latch Joint, and shell 30 also keeps the location, can not move.

One reducing gear as Figure 15, is a train of reduction gears 60, includes:

One housing 62, as Figure 16 to Figure 18, a hollow cylinder, inside has a cylindric room, and its right-hand member is sealing, and establishes a perforation 64, and left end is open shape.The inner peripheral surface ring of described housing 62 is established a circle tooth portion 66, the tooth of described tooth portion be parallel to housing axially.

One planet gear shaft 70 as Figure 19 to Figure 21, has a dish portion 72, establishes a non-circular joint 74 and an axial region 76 respectively in dish portion two ends.Described planet pin 70 is loaded in the described housing 62, and its joint 74 is piercing in outside the described housing from described perforation 64, and detains and establish C shape button 77, is butted on perforation 64 1 ends with described C shape button; And dish portion 72 is butted on perforation 64 other ends, so be can drive whole train of reduction gears to move when planet pin is moved.

Other has two

disk bodies

78,80, and each disk body such as Figure 22 to Figure 24 establish a gear part 82 in the right side, and described two disk bodies are arranged in the axial region 76 of described planet pin with its axis hole 84, as Figure 16, and turn.

Most planetary gears 85 as Figure 15 and Figure 25, are articulated on the jack-post 73 of the dish portion 72 of described planet pin and described two

disk bodies

78,80, described wait the planetary gear periphery and with tooth portion 66 bridle joints of described housing 62 inner peripheral surfaces.In addition, all bridle joints in the gear part of first disk body 78 82 and the planetary gear 85 that is hubbed on second disk body 80, the gear part 82 ' of second disk body 80 then with the planetary gear bridle joint that is hubbed on the planet pin 70.So, when first disk body 78 drives 80 rotations of second disk body, form decelerating effect; And second disk body also has decelerating effect when driving planet pin.

One lid 86 as Figure 26 to Figure 27, is covered on the open end of described housing 62, is buckled in the button hole 68 of housing 62 with its button portion 88.

Train of reduction gears 60 also is installed in first room 32 of shell 30, and the flange 69 that its housing 62 outer peripheral faces are set also is embedded in the set vertical caulking groove 38 of described room 32 inner peripheral surfaces, makes that housing 62 only can slippage in room 32, can't rotate.Described train of reduction gears also connects hole 53 left ends with what the joint 74 of described planet pin 70 was plugged in clutch part 50, and is multiple affixed with a latch.By this, described train of reduction gears 60 can with the axial synchronous shift of described clutch part 50 along shell 30, and described planet pin 70 can rotate synchronously with described clutch part 50.

One driving shaft 90, extremely shown in Figure 30 as Figure 28, the tool suitable length, its right-hand member is also established a gear part 92, and described driving shaft 90 is arranged in the axis hole 35 of described shell 30, as Fig. 2, its gear part 92 is positioned at first room 32, and its left end protrudes out outside the described central siphon 36.Described driving shaft 90 right-hand members penetrate in train of reduction gears from the through hole 89 of the lid 86 of train of reduction gears, as Figure 15, its gear part 92 and with first disk body 78 on planetary gear 85 in all bridle joints.This bridle joint mode is a deceleration design, make driving shaft 90 have decelerating effect when turning first disk body 78, simultaneously, first disk body turns also has a decelerating effect when second disk body 80 and second disk body turn planet pin 70, deceleration design by three sections significantly reduces when speed drive shaft is passed to planet pin.According to the design of this preferred embodiment, described the two rotating ratio of 90,70 is 27 to 1, that is when driving shaft rotated 27 circles, planet pin only rotated 1 circle.

In addition, solid one second fastener (C shape button) 94 of described driving shaft 90 buttons, as Fig. 2, by this, its gear part 92 and described fastener 94 are butted on lid 82 2 ends of described train of reduction gears respectively, make that driving shaft also can be with the axial displacement of train of reduction gears along shell.

One damping mechanism (B) comprising: a damping piece and a control member, wherein:

Described damping piece 95 as Fig. 2 and Figure 31, is a spring coil in the present embodiment, is installed in second room 34 of described shell, and the side face of its periphery and described room 34 coincide.One end of described damping piece have one extend internally protrude out the end 96.

Described control member 100 as Figure 32 to Figure 34, is located at the shell left end, in order to control described damping piece 95.Described control member 100 is the cylindric of hollow, and an end is closed, and the other end is closed form, and in the center of closing end and establish an endoporus 102, and its blind end internal face establishes one group of control portion 104 again, is the bossy body that a section is 180 degree radians.Described control member is sheathed on the left end of shell 30, and turns, and by the set annular protrusion 37 of the set annular groove 106 of inner circumferential surface and the outer peripheral face of shell dogging mutually, and can not break away from shell.Described group of control portion 104 stretches in second room 34, and is positioned at damping piece 95, as Figure 31, holds 96 corresponding to protruding out of damping piece, in order to stir the described end that protrudes out.In addition, be to be coated with a damping oil between the outer peripheral face of described control member inner peripheral surface and shell left end, make control member when rotating, have damping phenomena by described damping oil.

One interlock cover 110 as Fig. 2, is socketed on described control member 100 peripheries by a unidirectional driving member (present embodiment is a unilateral bearing 120).Wherein, unilateral bearing 120 is a known member, when interlock overlaps 110 when a direction is rotated, can drive control members via described unilateral bearing 120 and rotate synchronously; Otherwise when interlock was placed in the other direction rotation, unilateral bearing formed the idle running effect, made the interlock cover only can dally, and can't drive control member and rotate.

In present embodiment, described interlock cover 110 has cover portion in an outer race section and.Cover portion 112 in described, referring to Figure 35 to Figure 37, the circular cylinder body of a hollow, the one end is fixed in the periphery of unilateral bearing 120, and by the described control member 100 of being socketed in interior week of described unilateral bearing.

Described outer race section 115 as Figure 38 to Figure 40, also is the circular cylinder body of a hollow, and left end is a blind end, establishes a contacting part 116 again in the end face of its blind end.The portion that buckles 113 of cover portion in cover portion 112 peripheries in described outer race section 115 is sheathed on, its button hole 117 are buckled in consolidates so inside and outside cover portion overlaps mutually, and can rotate synchronously.Must explanation be, in the enforcement, described inside and outside cover portion can be made into an integral body, need not make two formulas.

The length that the central siphon 36 of described shell is extended just arrives interlock cover 110 parts of install, can be for endoporus 102,118 socket of described control member 100 and interlock cover 110, thus stable effect when described the two 100,110 rotation are provided.The free end of described driving shaft 90 protrudes out more outward than the interlock cover.

One rolling disc 130, as Figure 41 to Figure 43, one end is provided with at least one touch part 132 (present embodiment is provided with three and is concentrically ringed touch part).Described rolling disc 130 is fixed in the free end of described driving shaft 90 with the set non-circular hole 134 in its center, can drive described driving shaft and rotate, and the peritreme in described hole and the button portion 135 that establishes is buckled in driving shaft, makes rolling disc can not break away from driving shaft.The profile of described rolling disc is matched with the set rib 121 of spool 12 inner peripheral surfaces of roller shutter, so being halved together in interior week of rolling disc and spool can be passed through the spool interlock.

One spring 140 is located in described first room 32, as Fig. 2, one end is butted on described train of reduction gears 60, and the other end is butted on a dividing plate 33 of 32,34 of described two rooms, and its elastic energy forces in train of reduction gears, makes described gear train keep the right-hand member displacement of past shell under normality.

When casement curtain 16 is furled by spool 12 fully, described clutch part 50 is in an engagement travel, at this moment, as Figure 44, shown in Figure 45, the cam part 54 of clutch part misplaces mutually with the cam part 48 of the part 40 that is coupling, the active force that described spring 140 is executed makes train of reduction gears 60, clutch part 50, driving shaft 90 and rolling disc 130 are together toward shell 30 right-hand member displacements, under this state, clutch part fits with the part that is coupling, form beeline, and described rolling disc 130 residing positions make its touch part 132 can stir the contacting part 116 of described interlock cover 110, so but the described interlock cover of rolling disc interlock.

The user is with cloth curtain 16 bottom pulled down during with lowering cloth curtain, can drive spool 12 forward rotation (for example looking the counter clockwise direction of state) in the right side of Fig. 1, when spool 12 rotates, drive the stack shell 19 and described rolling disc 130 forward rotation of described detent mechanism 17, simultaneously, the furling mechanism that is positioned at spool inside also is subjected to spool institute's interlock and stores an elastic energy.

When rolling disc 130, drives described driving shaft 90 and rotates during forward rotation along with spool, also stir described interlock cover 110 simultaneously and rotate.When driving shaft 90 rotates, drive clutch part 50 via described train of reduction gears 60 and rotate, because the relation of decelerating effect, so only quite at a slow speed the rotation of described clutch part.Simultaneously, when described interlock overlapped 110 forward rotation, the outer ring of described unilateral bearing 120 formed idling conditions, thus interlock cover and can't drive described control member 100 rotations, so spool when just changeing state, control member remains in inactive state.

In the process of lowering cloth curtain 16, the angular displacement quite slowly all the time of described clutch part 50.After the user is with cloth curtain lowering one suitable distance, present embodiment is set at 30 centimeters, clutch part 50 is by position, angle shown in Figure 45, be displaced to position, angle (representing) shown in Figure 46 with expanded view, at this moment, the guiding on the inclined-plane 541,481 by described two

cam part

54,48, the cam part 54 of clutch part on the cam part 48 of the part 40 that is coupling, the disengaging stroke of beginning clutch part.When 30 centimeters of cloth curtain pulled down, described two cam part are just covered the distance on described two inclined-planes 541,481, and enter described disengaging stroke.

After entering described disengaging stroke, because of 54, the 48 phase cross-over connections of described two cam part, make the distance of

clutch part

50 and 40 of the parts of being coupling increase, clutch part is promptly toward shell 30 left end displacements, and promote described gear train 60, driving shaft 90 and rolling disc 130 simultaneously and turn left and be moved to a disengaging configuration, as shown in figure 47.When disengaging configuration, rolling disc 130 and interlock overlap 110 distance increase, at this moment, though rolling disc still is subjected to the drive of spool and keeps forward rotation, because its touch part 132 can't have been stirred the contacting part 116 that interlock overlaps, promptly keep transfixion so interlock overlaps.

When continuing down lowering cloth curtain, rolling disc 130 still continues to drive driving shaft 90 and rotates, and via the interlock of train of reduction gears 60, described clutch part 50 still is rotated further in breaking away from stroke, and changes the Qi Jiao position, as shown in figure 48.In breaking away from stroke, described two cam part 541,481 still keep cross-over connection, so buffer 20 keeps disengaging configuration.

The user is with 16 lowerings of cloth curtain to desired height and after stopping drag the cloth curtain, spool be subjected to furling mechanism elastic energy driving and when desiring reversed turning (looking the clockwise direction of state as Fig. 2 right side), the turn state of spool will touch described detent mechanism 17 revolutions, stop detent mechanism and will produce the clip state, spool firmly can't be rotated surely, so can keep the height of cloth curtain institute lowering.

When desiring to furl the cloth curtain, the user is more a little with cloth curtain pulled down, spool promptly can drive detent mechanism 17 forward rotation, detent mechanism one rotates, its clip state promptly is disengaged, and its stack shell 19 can turn round freely, no longer the clip spool, afterwards, the elastic energy of described furling mechanism can drive the spool reversed turning and then furl the cloth curtain.

During spool 12 reversed turnings, drive rolling disc 130 backward rotation, rolling disc promptly drives driving shaft 90, train of reduction gears 60 and clutch part 50 backward rotation.Though rolling disc 130 backward rotation, because when disengaging configuration, rolling disc also can't drive connected set pipe 110, so interlock pipe and control member 100 still keep static.When furling the cloth curtain, the decelerating effect of reducing gear can form first section cushioning effect, and making spool furl the speed of cloth curtain can be not too fast.

During clutch part 50 backward rotation,, still remain on cushion stroke by the state angle displacement of the state continuance of Figure 48 toward Figure 46.

Spool forward or reverse no matter, clutch part 50 all rotates thereupon in the same way, in other words, the variation of the position, angle of clutch part, in fact writing down all numbers of rotation of spool and the height of cloth curtain, so when spool counter-rotating furled the remaining suitable length (i.e. 30 centimeters length) of cloth curtain, described clutch part 50 just was displaced to the position of Figure 46, i.e. the initial position of cushion stroke.When spool continued revolution, clutch part promptly continued angular displacement, made its cam part 54 break away from the cam part 48 of the part 40 that is coupling, and was contacted by its inclined-plane 541,481.Thus state as can be known, along with the revolution of spool and clutch part, clutch part will be replied the joint stroke of Figure 44, Figure 45 gradually by cushion stroke, and described two cam part can be replied in the dislocation state, cross-over connection no longer mutually, clutch part and the distance that is coupling between part can shorten.At this moment, described spring 140 promptly promotes train of reduction gears, and drives the displacement of turning right of driving shaft 90, rolling disc 130 and clutch part synchronously, returns back to bonding station shown in Figure 2.After replying bonding station, the contacting part 116 of described interlock cover 110 is stirred in the touch part 132 of rolling disc 130, and drives interlock cover backward rotation.In the backward rotation, the inside and outside circle of unilateral bearing 120 rotates synchronously, rotates synchronously so the interlock cover drives control member 100 via described unilateral bearing.

Referring to Figure 31, when control member 100 rotates, its group control portion 104 will stir protruding out of described damping piece 95 and hold 96, the circumference of damping piece 95 promptly thereby is outward opened, press on the perisporium of second room 34, so control member drives damping piece when rotating in second room 34, described damping piece can form a frictional damping, simultaneously, 30 damping oils that are coated with of control member 100 and shell also can produce a damping action to the rotation of control member.Therefore, when buffer 20 was in bonding station, spool furled the cloth curtain to final stage, and in last coiling process, the damping action of damping mechanism (B) produces second section cushioning effect to spool, slows down the speed that furls the cloth curtain, in order to avoid excessive velocities.

As shown in the above description, the utility model is put in the process of cloth curtain in exhibition, no matter buffer is in bonding station or disengaging configuration, described damping piece all can not produce damping action (because of control member can't rotate), so can not influence the lowering of cloth curtain; Only when furling the cloth curtain, the damping mechanism beginning can produce damping, and the cushioning effect when furling the cloth curtain is provided, and described cushioning effect only will be furled when finishing in the cloth curtain and the beginning can take place; When the cloth curtain still had equivalent length, spool still furled the cloth curtain with rotating speed faster, so can not influence the time that furls the cloth curtain.

The utility model has the creativeness of height in ware, and the enhancement of tool practical effect.

Claims

1. the buffer of a roller shutter is characterized in that: be located in the spool of roller shutter, a cushioning effect is provided when spool furls the casement curtain; Described buffer includes:

2. the buffer of roller shutter as claimed in claim 1, it is characterized in that: described shell right-hand member has one first cam part; Described clutch includes: a clutch part, its right side have one second cam part; Described clutch part is hubbed in described first room, can in described room, rotate, and can be along the length travel of shell; Described two cam part in opposite directions; Described clutch part left end is connected with described reducing gear; When described bonding station, described two cam part dislocation; Described clutch part be subjected to described flexible member promotion and toward the displacement of described shell right-hand member; When described clutch part turned to described disengaging configuration, described two cam phase cross-over connections made left end displacement one distance of described clutch part toward described shell.

3. the buffer of roller shutter as claimed in claim 1, it is characterized in that: described clutch includes: be coupling a part and a clutch part, the described part that is coupling is fixedly arranged on described shell right-hand member, and its left side is towards described first room and establish one first cam part; Described clutch part has: a dish portion and is located at described dish portion right side and has one second cam part of suitable arc length, described clutch part is coupling between part and the described reducing gear described, described clutch part right-hand member and the described part that is coupling articulate and turn, and can produce relative slippage with the described part that is coupling, described two cam part are in opposite directions; Described clutch part left end is connected with described reducing gear; When described bonding station, the dislocation of described two cam part, described clutch part be subjected to described flexible member promotion and toward the displacement of described shell right-hand member; When described clutch part turned to described disengaging configuration, described two cam-trains were cross-over connection, made the left end displacement of described clutch part toward described shell.

4. the buffer of roller shutter as claimed in claim 3, it is characterized in that: an axial region is established in the left side of the described part that is coupling; The center, right side of described clutch part is established one and is connect the hole, and connects the described axial region that borehole jack is connected to the described part that is coupling with described, described clutch part is rotated, and must produce relative slippage with the described part that is coupling.

5. the buffer of roller shutter as claimed in claim 1, it is characterized in that: the side face of described first room is along the caulking groove that vertically is provided with predetermined number of shell; Reduction gearing such as described reducing gear is a train of reduction gears, has a housing and predetermined number and is installed in the interior reduction gearing of described housing, and is described can be turned by described driving shaft; The outer peripheral face of described housing is provided with the protuberance of predetermined number, and the is described protuberance of Denging is embedded in described the grade in the caulking groove; Described train of reduction gears must with described clutch synchronous shift, and can not rotate.

6. the buffer of roller shutter as claimed in claim 5, it is characterized in that: described housing is the hollow cylinder that an inside has a cylindric room, inner circumferential surface is established a circle tooth portion; Described train of reduction gears includes in addition:

One planet gear shaft has a dish portion, and described dish portion right-hand member is established a joint, and described planetary gear is located in the described housing and is turned; Described joint passes described housing right-hand member;

The planetary gear of predetermined number is hubbed at described dish portion left side in concentrically ringed mode, the described described circle tooth portion that waits planetary gear periphery bridle joint in described housing inner peripheral surface;

Described train of reduction gears is connected with described clutch with the joint of described planet pin;

A gear part is established in described driving shaft the inner, and described gear part stretches in the housing of described train of reduction gears, can drive the described planetary gear that waits and rotate, and makes described planet pin can drive described clutch start.

7. the buffer of roller shutter as claimed in claim 1, it is characterized in that: described damping mechanism comprises: a damping piece is a spring coil, rank is closed in the side face of described shell left end.

8. the buffer of roller shutter as claimed in claim 7, it is characterized in that: described damping mechanism includes in addition: a control member, be located at described shell left end; Described unidirectional driving member is connected in described control member; Can be during described rolling disc backward rotation via the described control member of described unidirectional driving member interlock, and activate described damping piece.

9. the buffer of roller shutter as claimed in claim 7, it is characterized in that: described shell left end is established one second room; Described damping piece is located in described second room, and rank is closed the side face in described room.

10. the buffer of roller shutter as claimed in claim 9 is characterized in that: an end of described damping piece is an end that protrudes out toward interior extension; Described damping mechanism includes in addition:

One control member is the tubular of hollow, and one group of control portion is established in its inside; Described control member is sheathed on described shell left end periphery, turned by described unidirectional driving member; Described group of control portion stretches in described second room, and is positioned at damping piece, when described control member is rotated, controls to such an extent that stir the described end that protrudes out for described group.

11. the buffer of roller shutter as claimed in claim 1 is characterized in that: described unidirectional driving member is a unilateral bearing; Other includes: an interlock cover, be socketed on described unidirectional driving member periphery, and can rotate in described shell left end place; The described driving shaft left end described interlock cover that stretches through out, affixed for described rolling disc; When described clutch was positioned at bonding station, described rolling disc can drive described interlock cover and rotate; When described clutch was positioned at disengaging configuration, described rolling disc can't the described interlock cover of interlock.

12. the buffer of roller shutter as claimed in claim 11 is characterized in that: the left end of described interlock cover is established a contacting part; Described rolling disc right-hand member is provided with at least one touch part; When described clutch is in bonding station, but interlock described contacting part in described touch part makes described rolling disc must drive described interlock cover and rotates; When described clutch is in disengaging configuration, produce distance between described touch part and described contacting part, described touch part can't the described contacting part of interlock.

13. the buffer of roller shutter as claimed in claim 12 is characterized in that: described interlock cover comprises cover portion in an outer race section and, is the cylindrical shell of a hollow, and described interior cover portion is to be socketed on described unidirectional driving member week in it; Described outer race section is socketed on described interior cover portion periphery; Described contacting part is located at described outer race section left end.

14. the buffer of roller shutter as claimed in claim 5 is characterized in that: described flexible member is located in described first room, and an end is butted on described room inwall, and the other end is butted on described reducing gear.

15. the buffer of roller shutter as claimed in claim 1 is characterized in that: described enclosure is provided with a central siphon, and described central siphon left end protrudes out outside the described shell, and its right-hand member is communicated with described first room; Described driving shaft is arranged in the described central siphon.