CN215244273U - Rolling device - Google Patents

Abstract

The utility model relates to a roll up curtain device, it is arranged in installing the framework that has the window, this roll up curtain device includes a roll curtain, two spiral strips and a actuating mechanism, roll up the curtain and install in a window side of framework, roll up the curtain and have the door curtain of door curtain spool and connect the door curtain of door curtain spool, the guide limit of the relative both sides of door curtain can move in the guide rail of the relative both sides of framework respectively, and the guide limit is equipped with a plurality of guide perforation that are an in-line equidistant range, two spiral strips are installed respectively in two guide rails of framework, actuating mechanism can drive two spiral strips synchronous forward rotation and reverse rotation, two spiral strips that are driven rotatory can change the spiral shell and locate the guide perforation position on two guide limits of door curtain and drive the door curtain and expand or receive and close, and borrow the guide limit that the door curtain was connected to the spiral strip that is located in the guide rail and prevent that the guide limit of door curtain breaks away from the guide rail.

Description

Rolling device

Technical Field

The utility model relates to a roll up curtain device, indicate especially one kind and can install in the door window of motor vehicle or skylight department and provide the roll up curtain device of sunshade function.

Background

The electric roller shutter device is arranged at a window or a skylight of the motor vehicle, a frame body is arranged at the inner side of the window or the inner side of the skylight, the frame body is provided with two parallel guide rails, the two guide rails are respectively arranged at the two opposite sides of the window or the skylight, the electric roller shutter device comprises a roller shutter and a driving component, the roller shutter is provided with a cloth curtain and a cloth curtain reel capable of automatically rolling up the cloth curtain, the cloth curtain reel is arranged at the outer side of a window of the frame body, the driving component is provided with a driving part capable of being driven by a motor, the driving part is connected with a movable edge of the cloth curtain, and the driving component can drive the cloth curtain to unfold and fold by a driving arm driven by the motor.

In order to make the curtain smoothly move in the process of unfolding and folding and the curtain can be supported by the frame body after the curtain is unfolded, the existing curtain rolling device is respectively provided with a hard guide edge at the long edges at the two sides of the curtain, the curtain rolling device can move along the guide rail by means of the hard guide edge, and the hard guide edge is positioned in the curtain guide groove of the guide rail and limited, so that the long edges at the two sides of the curtain can be supported by the guide rail, and the long edges at the two sides of the curtain can be prevented from being separated from the guide rail.

In the aforementioned conventional roller blind apparatus, the hard guide edges on the two long sides of the fabric curtain are retained in the fabric curtain guide grooves of the guide rail, so that the purpose of preventing the two long sides of the fabric curtain from separating from the guide rail is achieved. However, the hard guide edges on the two long sides of the cloth curtain have certain hardness but still have flexibility due to the requirement of the cloth curtain to be wound on the cloth curtain reel, so when the cloth curtain is pulled and unfolded, the hard guide edges on the two long sides of the cloth curtain move along the guide rail, and the hard guide edges still can be separated from the guide rail. In particular, in the case of large-area curtains, the weight of the curtain being unwound tends to drop, which tends to cause the hard guide edge to come off the guide rail, and there is a need for further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a roll up curtain device, solve the problem that the stereoplasm guide limit on the long limit of the cloth curtain both sides of current roll up curtain device prevents to take off the performance of guide rail not enough.

The utility model provides a technical solution is: the utility model provides a roll up curtain device, it is arranged in a framework that has the window, should roll up curtain device and include a roll up curtain, should roll up the curtain and have a cloth curtain reel and connect a cloth curtain of this cloth curtain reel, two guide edges of this cloth curtain can move along two guide rails of the relative both sides of this window respectively, wherein:

the two guide edges of the cloth curtain are respectively provided with a plurality of guide through holes which are parallel to the length direction of the guide rail and are arranged in a straight line at equal intervals;

the rolling curtain device comprises two spiral strips and a driving mechanism, the two spiral strips are respectively arranged in the two guide rails, the two spiral strips respectively and spirally penetrate through the guide through holes on the two guide edges of the cloth curtain, the driving mechanism is connected with the two spiral strips and can drive the two spiral strips to rotate in the forward direction and the reverse direction, and the two spiral strips can synchronously change the length of the two guide edges in a screwed mode to drive the cloth curtain to unfold and fold.

In the above-mentioned roller shutter device, the driving mechanism and the curtain roller are respectively installed at two opposite side ends of the frame body along the guide rail, one end of the spiral strip facing the curtain roller is a spiral head end, the other end of the spiral strip is a connecting end, the two spiral strips are connected with the driving mechanism through the connecting end, and the spiral head ends of the two spiral strips can be sequentially screwed into or screwed out of the guiding through hole of the guiding edge.

In the above-described roll screen device, the diameter of the spiral strip is smaller than the diameter of the guide through hole, and the pitch of the spiral strip is equal to the center distance between every two adjacent guide through holes.

In the above-mentioned roller blind apparatus, the driving mechanism has two motors, and each of the motors is connected to a connecting end of one of the spiral strips.

In the above-mentioned roller shutter device, the driving mechanism has a motor and a gear train transmission assembly connected to the motor, and the gear train transmission assembly is connected to the connecting ends of the two spiral strips.

In the above-mentioned roller shutter device, the cloth curtain has a movable edge strip capable of moving along the two guide rails; the rolling device also comprises a cloth curtain auxiliary unfolding mechanism, the cloth curtain auxiliary unfolding mechanism is connected with the movable edge strip, and when the cloth curtain is unfolded, the cloth curtain auxiliary unfolding mechanism provides force for pulling the cloth curtain.

In the roller blind apparatus described above, the auxiliary fabric curtain unfolding mechanism includes a wire winding shaft, at least one flexible wire, and an auxiliary motor, the wire winding shaft is rotatably mounted at the other side end of the window opposite to the fabric curtain winding shaft, two ends of the flexible wire are respectively connected to the wire winding shaft and the movable edge strip, the auxiliary motor is connected to the wire winding shaft, and the auxiliary motor can drive the wire winding shaft to rotate forward and backward, and can drive the fabric curtain to unfold and fold in an auxiliary manner through the flexible wire.

In the above-mentioned rolling device, the rolling device has a cloth curtain support rod, the cloth curtain support rod is disposed on the frame body and located between the window and the cloth curtain scroll, and the cloth curtain extends from the cloth curtain scroll and bypasses the cloth curtain support rod, and then the two spiral strips are screwed together.

In the above rolling shutter device, the fabric curtain has a soft fabric, the guiding edge has a colloid fixed on the long side of the soft fabric by hot pressing, and the guiding through hole passes through the long side of the soft fabric and the colloid fixed on the long side.

In the rolling shutter device, the curtain has a soft cloth material, the guiding edge has a film fixedly connected to the long edge of the soft cloth material, and the guiding through hole passes through the long edge of the soft cloth material and the film fixedly arranged on the long edge.

The utility model discloses the beneficial effect that can reach is, this book curtain device utilizes the spiral strip spiro union door curtain made of cloth of installing respectively in two guide rails of framework to have two guide limits that guide the perforation, is restricted in the guide rail through the spiral strip, drives rotatory two spiral strips by actuating mechanism and can change the spiral shell and locate the guide perforation position on two guide limits of door curtain made of cloth and drive the door curtain made of cloth and expand or close, and borrow the guide limit of connecting the door curtain made of cloth by the spiral strip that is located the guide rail and prevent effectively that the guide limit of door curtain made of cloth from breaking away from the guide rail.

The utility model discloses the roll up curtain device still can add a curtain cloth supplementary deployment mechanism, and this curtain cloth supplementary deployment mechanism connects the activity strake of this curtain cloth, at the in-process that the curtain cloth expandes, borrows by this curtain cloth supplementary deployment mechanism and provides the auxiliary force when pulling this curtain cloth and expand, offsets the part of curtain cloth spool to the roll-up strength of curtain cloth, makes the action that is driven rotatory two spiral strips to move the curtain cloth and expand more smooth-going.

The utility model discloses the roll up curtain device still can add a bracing piece between window and this cloth curtain spool at the framework, makes the cloth curtain that pulls out from this cloth curtain spool can earlier via the bracing piece flattening after, be the spiral spiro union in the reentrant guide rail, borrows this, makes the cloth curtain can level ground and drive to expand and receive for two spiral strips.

Drawings

Fig. 1 is a perspective view of a cloth curtain of a preferred embodiment of the rolling shutter device of the present invention in a retracted state.

Fig. 2 is a perspective view of a cloth curtain of another preferred embodiment of the rolling shutter device of the present invention in a retracted state.

Fig. 3 is a schematic sectional view of a preferred embodiment of the leading edge of the cloth curtain in the rolling shutter device of the present invention.

Fig. 4 is a schematic sectional view of another preferred embodiment of the leading edge of the cloth curtain in the rolling shutter device of the present invention.

Fig. 5 is a partial sectional view of the leading edge of the spiral strip screw-connected curtain in the guide rail according to the preferred embodiment of the present invention.

Fig. 6 is a partial perspective view of the guiding edge of the spiral strip screw-connected cloth curtain in the guide rail according to the preferred embodiment of the rolling curtain device of the present invention.

Fig. 7 is a partial perspective view of the spiral strip moving cloth curtain in the guide rail according to the preferred embodiment of the rolling blind apparatus of the present invention.

Fig. 8 is a perspective view illustrating the preferred embodiment of the roll screen apparatus shown in fig. 1 in a state where the screen is unfolded.

Fig. 9 is a perspective view of a cloth curtain of another preferred embodiment of the rolling shutter device of the present invention in a retracted state.

Fig. 10 is a perspective view of the rolling shutter device shown in fig. 9, in a retracted state.

Description of reference numerals:

1: frame body

101: first side

102: second side

11: window opening

12: guide rail

121: cloth curtain guide groove

2: rolling device

20: rolling screen

21: cloth curtain scroll

22: cloth curtain

220: soft cloth material

2201: long side

221: guide edge

221 a: colloid

221 b: film and method for producing the same

222: guide perforation

223: movable edge strip

23: support rod

30: spiral strip

31: screw head

32: connecting end

40: driving mechanism

41: motor with a stator having a stator core

42: gear train transmission assembly

50: auxiliary cloth curtain unfolding mechanism

51: wire winding shaft

52: flexible wire

53: an auxiliary motor.

Detailed Description

The technical means adopted by the present invention to achieve the objects of the present invention will be further described below with reference to the accompanying drawings and preferred embodiments of the present invention.

The utility model discloses roll up curtain device and be applicable to motor vehicle's door window sunshade screen or skylight sunshade screen, or other products that provide with the door curtain and open and close the function. As shown in fig. 1 and fig. 2, two preferred embodiments of the rolling blind apparatus 2 of the present invention are disclosed, the rolling blind apparatus 2 is installed in a frame 1 having a window 11, the frame 1 can be installed in a body of a motor vehicle and located at a side of the window or a sunroof, an axial direction is defined in the window 11 of the frame 1, two opposite sides of the frame 1 along the axial direction are a first side 101 and a second side 102, the frame 1 has a guide rail 12 on the opposite sides of the window 11 parallel to the axial direction, that is, the length direction of the guide rail 12 is parallel to the axial direction, each of the guide rails 12 has a curtain guide slot 121 with an opening facing the window 11, and the width of the opening of the curtain guide slot 121 is smaller than the width of the inner space of the curtain guide slot 121. The construction of the frame 1 and its guide rails 12 is prior art and will not be described herein.

As shown in fig. 1 and 2, the rolling shutter device 2 includes a rolling shutter 20, two spiral bars 30 and a driving mechanism 40. The rolling blind 20 includes a rolling blind shaft 21 and a rolling blind 22, the rolling blind shaft 21 includes a shaft tube and a rolling receiver installed in the shaft tube, and the rolling blind shaft 21 is a conventional product. The cloth curtain scroll 21 can be rotatably installed on the first side 101 of the frame 1, one side end of the cloth curtain 22 is connected with the cloth curtain scroll 21, the other side end of the cloth curtain 22 is provided with a movable edge strip 223, the cloth curtain 22 can be automatically wound on the cloth curtain scroll 21 for folding, the cloth curtain 22 can be pulled out and unfolded from the cloth curtain scroll 21, two opposite side edges of the cloth curtain 22 parallel to the axial direction are respectively a guiding edge 221, when the cloth curtain 22 is unfolded and folded, the two guiding edges 221 can respectively extend into the cloth curtain guide grooves 121 of the guide rails 12 corresponding to the positions and can move along the guide rails 12, and the two guiding edges 221 are respectively provided with a plurality of guiding through holes 222 which are arranged in a straight line at equal intervals along the axial direction.

As shown in fig. 3, the cloth curtain 22 can be made of a soft cloth 220 such as a random cloth or other woven cloth, the guiding edge 221 of the cloth curtain 22 has a colloid 221a fixed to the long side 2201 of the soft cloth 220 in parallel to the axial direction by hot pressing, and the guiding through hole 222 passes through the long side 2201 of the soft cloth 220 and the colloid 221a fixed to the long side 2201. Alternatively, as shown in fig. 4, the guiding edge 221 has a film 221b fixedly attached to the long side 2201 of the soft cloth 220 parallel to the axial direction by adhesion or sewing, and the guiding through hole 222 passes through the long side 2201 of the soft cloth 220 and the film 221b fixedly attached to the long side 2201. The leading edge 221 of the curtain 22 has appropriate hardness and bending elasticity by the leading edge 221 coupled with the long edge 2201 of the soft cloth 220 through the colloid 221a or the film 221b, so that both the soft cloth 220 and the leading edge 221 of the curtain 22 can be wound on the curtain reel 21, and the long edge 2201 of the soft cloth 220 is coupled with the colloid 221a or the film 221b, so that the soft cloth is not easy to shed and has good wear resistance.

As shown in fig. 1, 2, 5 and 6, the two spiral strips 30 are respectively installed in the two guide rails 12, and the two spiral strips 30 respectively spirally pass through the guiding through holes 222 of the two guiding edges 221 of the cloth curtain 22, and the two spiral strips 30 can be synchronously driven to rotate to change the length of the two guiding edges 221 spirally arranged on the cloth curtain 22, so as to drive the cloth curtain 22 to unfold and fold. Wherein, the two spiral strips are defined to drive the cloth curtain 22 to move towards the unfolding direction as a forward rotation, and the two spiral strips drive the cloth curtain 22 to move towards the folding direction as a reverse rotation. It should be further noted that the two spiral strips 30 are respectively screwed to the two guiding edges 221 on the two opposite sides of the cloth curtain 22, so that the two spiral strips 30 are synchronously driven to rotate in the forward direction (rotate in the reverse direction), that is, when the forward rotation of one spiral strip 30 is clockwise rotation, the forward rotation of the other spiral strip 30 is counterclockwise rotation, and the two guiding edges 221 of the cloth curtain 22 are synchronously driven to move in the same direction; similarly, when the reverse rotation of one helical strip 30 is counterclockwise, the reverse rotation of the other helical strip 30 is clockwise.

In the foregoing, one end of each of the two spiral strips 30 has a spiral head 31, the other end of each of the two spiral strips 30 is a connection end 32, the spiral head 31 is located at one end of the spiral strip 30 adjacent to the curtain winding shaft 21 and is a free end, the connection end 32 is located at the other end of the spiral strip 30 away from the curtain winding shaft 21 and extends out of the guide rail 12, the connection end 32 is located at the center line of the spiral strip 30, the two spiral strips 30 can be driven to synchronously rotate in the forward direction and the reverse direction, wherein, through the forward rotation of the two spiral strips 30, the spiral head 31 can be rotated from one guide through hole 222 in the guide edge 221 of the curtain 22 to the next guide through hole 222 to drive the curtain 22 to unfold, and through the reverse rotation of the two spiral strips 30, the spiral head 31 is sequentially separated from the guide through holes 222 in the guide edge 221 of the curtain 22, and the curtain 22 is folded under the action of the curtain roller 21 automatically rolling up the curtain 22.

As shown in fig. 5 and 6, in the preferred embodiment, the diameter of the spiral strip 30 is smaller than the diameter of the guiding through hole 222, and the pitch of the spiral strip 30 is equal to the center distance between every two adjacent guiding through holes 222, so that the spiral strip 30 can easily pass through the guiding through hole 222 of the cloth curtain 22 and be separated from the guiding through hole 222.

As shown in fig. 1 and 2, the driving mechanism 40 is installed on the second side 102 of the frame 1, so that the driving mechanism 40 and the curtain winding shaft 21 are respectively located on two opposite sides of the frame 1 along the axial direction, the driving mechanism 40 is connected to the connecting ends 32 of the two spiral strips 30 and can drive the two spiral strips 30 to synchronously rotate in the forward direction and in the reverse direction, the spiral ends 31 of the two spiral strips 30 rotating synchronously can be sequentially screwed into the guiding through holes 222 of the guiding edges 221 or screwed out of the guiding through holes 222, and further the length of the two guiding edges 221 is changed to drive the curtain 22 to be unfolded and folded.

As shown in fig. 1, the driving mechanism 40 may have two motors 41, and each motor 41 is connected to the connecting end 32 of one of the spiral bars 30. Alternatively, as shown in fig. 2, the driving mechanism 40 has a motor 41 and a gear train transmission assembly 42 connected to the motor 41, and the gear train transmission assembly 42 is connected to the connecting end 32 of the two spiral bars 30, instead of the two motors 42 respectively driving the two spiral bars 30, the gear train transmission assembly 42 may be a pulley set or other equivalent gear train transmission assembly.

As shown in fig. 1, 5, 6 and 7, in the case of using the rolling shutter device 2, when the cloth curtain 22 is folded, the cloth curtain 22 is wound around the cloth curtain reel 21, and the window 11 of the housing 1 is in an unshielded state. When the cloth curtain 22 is unfolded, the driving mechanism 40 drives the two spiral strips 30 to synchronously rotate in the forward direction, and the spiral heads 31 of the two spiral strips 30 are screwed into the next guiding through hole 222 from one guiding through hole 222 in the guiding edge 221 of the cloth curtain 22, so that the spiral strips 30 are increased in length of the screwed guiding edge 221, and the cloth curtain 22 is driven to be unfolded to shield the window 11 of the frame body 1.

As shown in fig. 1, 5, 6 and 7, when the curtain is folded, the driving mechanism 40 drives the two spiral strips 30 to rotate reversely, so that the spiral ends 31 sequentially disengage from the guiding through holes 222 of the guiding edge 221 of the curtain 22, and the curtain 22 is gradually wound around the curtain reel 21 to the folded state under the action of the curtain reel 21 automatically winding the curtain 22.

In the preferred embodiment shown in fig. 1 and 7, the rolling blind device 2 can further add a support rod 23 between the window 11 and the blind roller 21 of the frame 1, so that the blind 22 of the rolling blind 20 extends from the blind roller 21, passes through the support rod 23 to be leveled, then extends into the guide rail 12 and is screwed with the two spiral strips 30. Therefore, the cloth curtain 22 can be flatly unfolded and folded by the two spiral strips 30.

The aforementioned combination structure of the two spiral strips 30 driven by the driving mechanism 40 screwed with the guiding through holes 222 of the two guiding edges 221 of the cloth curtain 22, together with the cloth curtain roller 21 connected with the cloth curtain 22, is enough to make the cloth curtain 22 perform the functions of unfolding and folding. As shown in fig. 8 and 9, the rolling device 2 may further include a curtain auxiliary unfolding mechanism 50, the curtain auxiliary unfolding mechanism 50 is connected to the movable edge strip 223 of the curtain 22, and during the unfolding process of the curtain 22, the curtain auxiliary unfolding mechanism 50 provides an auxiliary force for pulling the curtain 22 to unfold so as to offset a part of the winding force of the curtain winding shaft 21 on the curtain 22, so that the two spiral strips 30 driven to rotate drive the curtain 22 to unfold more smoothly.

In the preferred embodiment shown in fig. 8 and 9, the auxiliary curtain unfolding mechanism 50 includes a wire winding shaft 51, at least one flexible wire 52 and an auxiliary motor 53, the wire winding shaft 51 is rotatably mounted on the second side 102 of the frame 1, two ends of the flexible wire 52 are respectively connected to the wire winding shaft 51 and the movable edge 223, in the preferred embodiment shown, two flexible wires 52 are connected to the wire winding shaft 51 and the movable edge 223 in parallel at intervals to provide balanced force to the movable edge 223, the auxiliary motor 53 is connected to the wire winding shaft 51, and the auxiliary motor 53 can drive the wire winding shaft 51 to rotate forward and backward, so that the rotating wire winding shaft 51 can wind and release the flexible wire 52. When the wire winding shaft 51 rotates in the forward direction, the flexible wire 52 is wound to apply a pulling force to the movable edge strip 223 of the cloth curtain 22 to assist the two spiral strips 30 to pull the cloth curtain 22 to be unfolded, and when the wire winding shaft 51 rotates in the reverse direction, the wire winding shaft 51 releases the flexible wire 52, so that the cloth curtain 22 is automatically folded under the winding force of the cloth curtain winding shaft 21.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make various changes or modifications equivalent to the embodiment of the present invention without departing from the scope of the present invention, but all the simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a roll up curtain device, its is arranged in a framework that has the window, should roll up the curtain device and include a roll curtain, should roll up the curtain and have a cloth curtain reel and connect a cloth curtain of this cloth curtain reel, two guide edges of this cloth curtain can move along two guide rails of the relative both sides of this window respectively, its characterized in that:

the two guide edges of the cloth curtain are respectively provided with a plurality of guide through holes which are parallel to the length direction of the guide rail and are arranged in a straight line at equal intervals;

the rolling curtain device comprises two spiral strips and a driving mechanism, the two spiral strips are respectively arranged in the two guide rails, the two spiral strips respectively and spirally penetrate through the guide through holes on the two guide edges of the cloth curtain, the driving mechanism is connected with the two spiral strips and can drive the two spiral strips to rotate in the forward direction and the reverse direction, and the two spiral strips can synchronously change the length of the two guide edges in a screwed mode to drive the cloth curtain to unfold and fold.

2. The roller shutter device according to claim 1, wherein the driving mechanism and the curtain roller are respectively installed at opposite ends of the frame along the guide rail, one end of the spiral strip facing the curtain roller is a spiral head end, the other end of the spiral strip is a connection end, the two spiral strips are connected to the driving mechanism through the connection end, and the spiral head ends of the two spiral strips can be sequentially screwed into or unscrewed from the guide through holes of the guide edges.

3. The rolling shutter device according to claim 2, wherein the spiral strip has a wire diameter smaller than the hole diameter of the guide perforation, and a pitch of the spiral strip is equal to a center distance between every two adjacent guide perforations.

4. The roller shade device according to claim 2, wherein the driving mechanism has two motors, each of the motors being connected to a corresponding one of the connection ends of one of the spiral strips.

5. The roller shutter device according to claim 2, wherein the driving mechanism has a motor and a gear train transmission member connected to the motor, the gear train transmission member connecting the connecting ends of the two spiral bars.

6. The roller shutter device according to any one of claims 1 to 5, wherein the cloth curtain has a movable edge strip movable along the two guide rails; the rolling device also comprises a cloth curtain auxiliary unfolding mechanism, the cloth curtain auxiliary unfolding mechanism is connected with the movable edge strip, and when the cloth curtain is unfolded, the cloth curtain auxiliary unfolding mechanism provides force for pulling the cloth curtain.

7. The rolling shutter device according to claim 6, wherein the auxiliary curtain-unfolding mechanism includes a wire-winding shaft rotatably mounted at the other side of the window opposite to the curtain-winding shaft, at least one flexible wire connected at its two ends to the wire-winding shaft and the movable edge strip, and an auxiliary motor connected to the wire-winding shaft and capable of driving the wire-winding shaft to rotate forward and backward and driving the curtain to unfold and fold in an auxiliary manner via the flexible wire.

8. The rolling shutter device according to any one of claims 1 to 5, wherein the rolling shutter device has a curtain support rod disposed on the frame between the window and the curtain roller, the curtain extending from the curtain roller and passing around the curtain support rod to be screwed with the two spiral strips.

9. The rolling shutter device according to any one of claims 1 to 5, wherein the curtain comprises a soft cloth, the guiding edge comprises a glue body thermally pressed and fixed on the long side of the soft cloth, and the guiding through hole passes through the long side of the soft cloth and the glue body fixing the long side.

10. The rolling shutter device according to any one of claims 1 to 5, wherein the curtain is made of soft cloth, the guiding edge has a film fixedly connected to the long side of the soft cloth, and the guiding perforation passes through the long side of the soft cloth and the film fixedly connected to the long side.

Images