TWM561128U - Rolling device of window covering - Google Patents

Abstract

The present invention relates to a scrolling device for a curtain comprising: a main body having a shaft, the metal ring is sleeved outside the shaft; one end of the driving member passes through the shaft, and the other end is pivotally connected to the rotating disc, and the outer circumference of the rotating disc is connected to the pulling rope; The inner sleeve is provided with at least one slot, the outer sleeve is provided with at least one rib at each of the slots, and the inner sleeve and the outer sleeve are covered with a metal ring; the plurality of coils are disposed on the metal ring and the coils are The two ends are protruded between the slot and the rib; the plurality of planetary gear shafts of the first speed reduction mechanism are disposed on the driving member and mesh with the ring tooth portion of the rotating disk; the cover member and the linking member are coupled to the The outer sleeve, the plurality of planetary gear shafts of the second speed reduction mechanism are disposed on the linking member and mesh with the ring tooth portion of the outer cover member; when the rotating disk is rotated to control the curtain, the two speed reducing functions are provided to save labor .

Description

Curtain rolling device

This creation relates to curtains, and more specifically to a scrolling device for use in a window covering, which has a labor-saving effect during operation.

According to the curtain structure, a bead mechanism is installed at one end of the curtain track, and the bead mechanism can drive the reel in the curtain track to rotate, so that the curtain fabric or the curtain blade attached to the reel can be raised or lowered. To produce a dimming function.

In the conventional curtain structure, since the bead mechanism and the reel are driven at the same speed, there is no labor saving effect. Therefore, the industry provides a curtain designed with labor-saving design, which is provided with a speed reduction mechanism in the curtain structure to achieve the effect of labor-saving operation. .

However, large curtains are becoming more and more popular. For large curtains, because of the large weight of the curtain fabric or the curtain blades, even the bead mechanism with a single reduction mechanism is difficult to operate when operating the bead mechanism. Because the bead plate and the reel are driven at a constant speed, there is no labor saving effect, so it is necessary to spend a large amount of force to overcome the weight of the curtain fabric, which causes operational difficulties, and is a defect that needs to be improved.

The main purpose of the present invention is to provide a scrolling device for use in a curtain, which has a design with two deceleration effects, which can save labor and make the operation of the curtain more convenient.

The scrolling device for a curtain provided by the present invention comprises: a main body comprising a shell and a casing, the shell having one first chamber at one end and a second chamber at the other end, the first a shaft is protruded from the chamber to the second chamber, and a shaft is protruded. The shaft has a shaft hole at the center thereof, and the outer casing covers the first chamber; a driving member has a first disc and a first disc is disposed at the first chamber a driving portion of the front end of the disc, the first disc is disposed in the first chamber, the driving portion is disposed in the shaft and protrudes outside the shaft hole thereof; a rotating disc is disposed in the first chamber Medium and rotatable, a core hole is arranged in the center of the rotating disk, and the inner circumference of the core hole is provided with a first ring tooth portion, and the outer circumference of the rotating disk can be wound around a pulling rope; a metal ring, sleeve An outer sleeve; an inner sleeve covering the metal ring and being assembled on the driving portion of the driving member, being rotatable and rotating, and having at least one slot at a periphery thereof; an outer sleeve The sleeve is disposed outside the inner sleeve and is accommodated in the second chamber, and the inner peripheral surface thereof is provided with at least one rib. Each of the ribs corresponds to each slot of the inner sleeve; a plurality of coils are sleeved on the metal ring and are wrapped in the inner sleeve, and the two ends of the coils protrude outwardly and are in the slotted Between the ribs, when the driving member drives the inner sleeve to rotate and push the end of the coil, so that the plurality of coils expand without tightening the metal ring, the inner sleeve can push the outer sleeve The rotation of the cylinder can control the upper and lower retracting of the curtain fabric, but when the curtain fabric is forced to force the outer sleeve to rotate, the rib pushes the ends of the coils to make the outer diameter of the coils smaller. When the metal ring is tightened to generate a braking effect, the curtain fabric can be maintained in the adjusted position; a first speed reducing mechanism is disposed in the first housing, and includes a plurality of first planetary gear shafts disposed on the driving The first disc of the member is engageable with the first ring gear portion of the rotating disc and a first main gear disposed on the outer casing. When the pulling rope is pulled, the rotating disc will drive the plurality of rotating discs. The first planetary gear drives the driving member to rotate, thereby generating a first deceleration; The outer cover member is disposed at an end of the second chamber, and has a concave space. The inner peripheral wall of the inner concave space is provided with a second ring tooth portion, and a through hole is formed in the center of the inner concave space. a linkage member having a second disc with a connecting shaft extending through the through hole of the outer cover member at one end and configured to be coupled with the mandrel of the curtain, the second disc being received within the outer cover member a second deceleration mechanism is disposed in the concave space of the outer cover member, and includes a plurality of second planetary gear shafts disposed on the second disc of the linkage member, and the outer cover member The second ring gear portion is engaged, and a second main gear disposed on the outer sleeve, the second main gear is driven by the second main gear, so that the linkage member can rotate the mandrel of the curtain, Provides a second deceleration.

Preferably, the outer circumference of the shaft is equidistantly arranged with a plurality of grooves, and the metal ring is provided with a plurality of positioning ribs on the inner circumference thereof, and the positioning ribs are embedded in the plurality of grooves.

Preferably, a plurality of oil-retaining tanks are disposed on the outer periphery of the metal ring, and the lubricating oil can be filled in the oil-retaining tanks.

Preferably, the first speed reduction mechanism is pivotally provided with a plurality of first planetary gears on the first disc of the driving member, and the plurality of teeth of the outer circumference of the first planetary gears are firstly engaged with the rotating disk a ring-shaped portion, a center portion of the inner wall surface of the outer casing protrudes from a first shaft portion, the first shaft portion is provided with annular teeth to form the first main gear, and the first main gear has its annular teeth and the same A planetary gear meshes.

Preferably, the second speed reduction mechanism is pivotally provided with a plurality of second planetary gear shafts on the second disc of the linking member, and the plurality of teeth of the outer circumference of the second planetary gears are engaged with the outer cover member. a second ring gear portion, the outer sleeve projecting a second shaft tube on the outer wall surface, the second shaft tube circumferential surface is provided with an annular tooth to form the second main gear, the second main gear with its annular teeth and The second planetary gears mesh.

Preferably, the inner kit is provided with two slots and is separated by 180 degrees.

Preferably, the driving portion of the driving member is set to three stages, and the shaft hole corresponding to the housing is set to a circular shape in the previous stage, wherein the stage is set to a square shape, and the subsequent stage is set to a circular shape, and the inner sleeve is centered. The first stage of the driving portion is set to be a square first hole, and the outer sleeve is provided with a circular hole at a stage corresponding to the center of the driving portion, and the driving portion of the driving member passes through the first group of holes, the circle a hole, the inner sleeve can be rotated by the driving member, and the outer sleeve can be rotated by the inner sleeve.

Preferably, the connecting shaft of the linking member is provided with a second set of connecting holes for inserting the mandrel of the blind and engaging a ring to be screwed into and locked by a bolt from the outer side of the circumference.

Preferably, the pulling rope is a bead chain, so that a plurality of slots can be recessed on the outer periphery of the rotating disc, so that the bead chain can be embedded.

Preferably, the pulling rope is a pull cord, so that the outer peripheral structure of the rotating disc can be matched with a ring groove structure for the drawstring to be wound.

Thereby, the first deceleration mechanism and the second deceleration mechanism are provided to achieve the double deceleration effect, so that the rotation speed of the linkage member is smaller than the rotation disc, so the rotation disc can easily drive the linkage member to rotate, for a larger type. The curtains, the curtains that are wound up have a large weight, and although the rotation speed is slow, the curtains can be rolled up, and the operation and use are labor-saving and convenient.

First, please refer to the first and second figures. A scrolling device 1 for a curtain is mounted on one end of a curtain rail 200 and is used to connect with the mandrel 300 of the curtain. The curtain pulling rope 33 of the embodiment is a bead chain, and the pulling device 33 can be pulled by pulling the curtain to enable the rolling device 1 to pull or lift the curtain blade or curtain fabric (not shown) and can be moved to any position. Positioning; the aforementioned curtain blade, curtain fabric, track 200, and mandrel 300 are not the main features of the present invention, and will not be further described herein.

The scrolling device 1 of the present invention, as shown in the third, fourth and fifth figures, mainly includes a main body 10, a driving member 20, a rotating disc 30, a metal ring 40, and an inner kit 50. An outer sleeve 60, a plurality of coils 70, a first reduction mechanism 80, a cover member 90, a linkage member 100, and a second reduction mechanism 110.

The main body 10 includes a housing 11 and a housing 17 . The housing 11 has a first chamber 12 at one end and a second chamber 13 at the other end. The second chamber 13 is provided with a shaft 14 . The center of the rod 14 has a shaft hole 15 , and a plurality of longitudinal grooves 16 are arranged at equal intervals on the outer circumference of the shaft 14 . The outer casing 17 covers the first chamber 12 , and the inner wall surface of the outer casing 17 protrudes from the center. Shaft portion 18.

The driving member 20 has a first disc 21 and a driving portion 22 disposed at the front end of the first disc. The driving member is mounted in the housing 11 and is rotatable. The first disc 21 is disposed. In the first chamber 12, the driving portion 22 is disposed in the shaft 14 and protrudes outside the shaft hole 15; a third shaft pin 23 is disposed on an end surface of the first disc 21; the driving portion 22 is provided In the three stages, the front stage 221 is formed in a circular shape corresponding to the shaft hole 15 of the housing 11, and the stage is set to a non-circular joint portion 222. This embodiment is a square shape, which may of course be a hexagon or other polygon. In the shape, the subsequent stage 223 is set to a circle.

The rotating disk 30 is disposed in the first chamber 12 and is rotatable. A center hole 31 is disposed in a center of the rotating disk 30. A circumferential surface of the core hole 31 is provided with a first ring tooth portion 32. The rotating disk 30 is provided. The outer circumference of the rotating rope 33 is a bead chain, and the outer peripheral edge of the rotating disc 30 is recessed with a plurality of recesses 34 for the bead chain to be embedded (for example, In the sixth figure, the pull cord 33 can also be a pull cord. At this time, the outer circumference of the rotary disc 30 is matched with a ring groove structure for the drawstring to be wound (not shown). .

The metal ring 40 is provided with a plurality of longitudinal positioning ribs 41 on the inner circumference thereof. When the metal ring is sleeved on the outside of the shaft 14, the plurality of positioning ribs 41 can be embedded in the plurality of grooves 16 to make the metal ring 40 In combination with the shaft 14 and fixing the metal ring without rotating; the outer circumference of the metal ring 40 is provided with a plurality of oil-retaining grooves 42, each of which is strip-shaped and located in the metal ring 40 in this embodiment. In the longitudinal direction, lubricating oil can be filled in the oil reservoir 42.

The inner sleeve 50 is covered with the metal ring 40 and is coupled to the driving portion 22 of the driving member 20. The inner sleeve 50 is provided with two corresponding slots 51 at the periphery, and the two slots 51 are respectively The circumference of the inner sleeve 50 is set to be a non-circular (square) first set of holes 52.

The outer sleeve 60 is sleeved on the outer portion of the inner sleeve 50 and is received in the second chamber 13 together with the inner sleeve 50. The outer sleeve 60 has two ribs 61 protruding from the inner circumferential surface. The ribs 61 are spaced apart by 180 degrees, corresponding to the two slots 51 of the inner sleeve 50 (see the seventh figure), and the center of the first set of holes 52 corresponding to the inner sleeve 50 is provided with a circular hole. 62. The joint portion 222 of the driving portion 22 of the driving member 20 is disposed in the first group of connecting holes 52, and the subsequent stage 223 is inserted into the circular hole 62, so that the outer sleeve 60 can be driven and followed. Rotate.

The plurality of coils 70 are two in the embodiment of the present specification, and are sleeved on the metal ring 40 and wrapped in the inner sleeve 50. The two ends 71 of the coils 70 protrude outwardly and Between the slot 51 of one of the inner sleeves 50 and one of the ribs 61 of the outer sleeve 60, as shown in the seventh figure, when the drive member 20 is rotated to rotate the inner sleeve 50 (located in the slot Pushing one end 71 of the reed 70 on the side of the 51, which will cause the diameter of the reed 70 to expand without tightening the metal ring 40, so that the inner sleeve 50 can be rotated on the metal ring 40. When the inner sleeve 50 rotates, the outer rib 61 of the outer sleeve 60 is in its slot 51, and the outer sleeve 60 is pushed to rotate. For example, as shown in the ninth figure, the inner sleeve 50 pushes the coil in a clockwise direction. One of the ends 71 of the 70, and the rib 61 of the outer sleeve 60 is accessible, and the outer sleeve can be driven to rotate together. Therefore, when the inner sleeve 50 is pressed against one end 71 of the coil 70, the inner sleeve 50, the coil 70 and the outer sleeve 60 can be rotated on the metal ring 40, thereby controlling the upper and lower retracting of the curtain fabric. However, when the curtain fabric is forced to force the outer sleeve 60 to rotate, the rib 61 pushes one end 71 of the coil 70 to make the outer diameter of the coil 70 smaller and tighten the metal ring 40. Producing a braking action, as shown in the tenth figure, so that the curtain fabric can be maintained at the adjusted position or height; therefore, when the user does not pull the pulling rope 33, the curtain leaf or the curtain fabric is positioned to be adjusted. Height, will not move. The metal ring 40 is disposed outside the shaft 14 for the plurality of coils 70 to be sleeved, so that both of the metal materials can have a long service life whether they are assembled or related. Moreover, the lubricating oil in the plurality of oil-receiving tanks 42 of the metal ring 40 can provide lubrication and rust prevention.

The first speed reduction mechanism 80 is disposed in the first chamber 12, and includes a plurality of first planetary gears 81 and a first main gear 82. The first planetary gears 81 have three in the embodiment. a three-axis pin 23 disposed on the first disk 21 of the driving member 20, the first main gear 82 is formed on the outer casing 17 by the annular portion of the first shaft portion 18, and the first planetary gear 81 is formed. The first ring gear 32 and the first main gear 82 of the rotating disk 30 can be engaged with the first main gear 82 (please refer to the sixth figure). When the pulling rope 33 is pulled, the rotating disk 30 will drive the rotating disk 30. The first planetary gear 81 drives the drive member 20 to rotate and produces a first deceleration. When the urging force is transmitted to the driving member 20 from the rotating plate 30, the driving force is decelerated, so that the urging force has an effect of amplifying, so that the rotating plate 30 can be slightly biased to drive the driving member 20 to rotate.

The cover member 90 is disposed at one end of the main body 10, and is assembled to one end of the second chamber 13. In this embodiment, the outer cover member 90 is disposed outside the circumference of the outer cover member 90 and the outer circumference of the housing portion 11 is respectively disposed. There may be a plurality of sets of posts 91 and a set of stubs 19 (of course, there may be other different forms of the structure and manner, which are not the main features of the present invention, and will not be described here); the cover member 90 has an inner The recessed space 92 is provided with a second ring-shaped portion 93 on the inner peripheral wall of the recessed space 92, and a through hole 94 is formed in the center of the recessed space 92.

The connecting member 100 has a second disc 101. One end of the connecting shaft 102 protrudes through the through hole 94 of the outer cover member 90. The connecting shaft 102 has a second set of non-circular (square) holes. 103, for inserting and mating with the mandrel 300 of the curtain, a ring 301 is screwed from a circumference of the circumference thereof by a bolt (not shown), and the second disc 101 is fitted in a concave space of the cover member 90. In the 92, a four-axis pin 104 is disposed on the second disc 101.

The second reduction mechanism 110 is disposed in the recessed space 92 of the cover member 90. The second reduction gear unit 110 includes a plurality of second planetary gears 111 and a second main gear 112. The second planetary gears 111 have four in the embodiment. And a four-axis pin 104 pivotally disposed on the second disc 101 of the linking member 100. A center of the outer wall surface of the circular hole 62 of the outer sleeve 60 protrudes from a second shaft tube 63. The second main gear 112 Forming annular teeth on the outer circumferential surface of the second shaft tube 63, the second planetary gears 111 and the second ring gear portion 93 of the outer cover member 90 and the second main gear on the outer sleeve 60 112 is engaged (please refer to FIG. 8 ). When the outer sleeve 60 is rotated by the driving member 20 , the second main gear 112 will drive the plurality of second planetary gears 111 to rotate, so that the linking member 100 rotates and rotates the mandrel 300 of the curtain to rotate, so that a second deceleration is generated, when the biasing force is transmitted from the outer sleeve 60 to the linkage 100, so as to be rearward to the mandrel 300 of the curtain. Also in the deceleration state, it also has the effect of amplifying the force, so the slightest from the beginning of the driving member 20 Applying force, it can drive the mandrel 300 of the curtain which bears the weight of the curtain fabric and the curtain blade (especially the curtain fabric and the blade of the large curtain), which is greatly reduced in operation and easy to roll the fabric. It has the effect of making the operation more convenient.

The scrolling device 1 for curtains provided by the present invention is provided with the metal ring 40 made of metal for the coil 70 to be bundled, so that the shaft 14 of the main body 10 is not worn, so that the metal ring 40 and the spring The ring 70 can ensure a true frictional tightening state, and the metal ring 40 has lubricating oil in the oil sump 42 to provide lubrication and anti-corrosion effect, which is beneficial to the rotation of the coil 70; The deceleration mechanism 80 and the second deceleration mechanism 110 achieve the double deceleration function, and the first deceleration is generated when the rotating disc 30 is transmitted to the driving member 20 to drive the outer sleeve 60, and then transmitted by the outer sleeve 60. The linkage 100 generates a second deceleration effect, so that the rotation speed of the linkage 100 (the mandrel 300 connecting the curtains) is much smaller than that of the rotary disk 30, so the rotary disk 30 can easily drive the linkage 100 (the curtain The mandrel 300) is rotated. For larger curtains, the curtains or curtains that are rolled up have a large weight, and the use of the present creation can still be used to operate the curtains with ease, which is convenient.

1‧‧‧Rolling device
10‧‧‧ Subject
11‧‧‧Shell
12‧‧‧First room
13‧‧‧Second room
14‧‧‧ shaft
15‧‧‧Axis hole
16‧‧‧ Groove
17‧‧‧Shell
18‧‧‧First shaft
19‧‧ ‧ take over
20‧‧‧ Drives
21‧‧‧First disc
22‧‧‧ Drive Department
221‧‧‧Previous stage
222‧‧‧Combination Department
223‧‧‧post stage
23‧‧‧ axle pin
30‧‧‧ rotating disk
31‧‧‧heart hole
32‧‧‧First ring tooth
33‧‧‧ Pulling the rope
34‧‧‧Inlay
40‧‧‧Metal ring
41‧‧‧ positioning ribs
42‧‧‧ oil tank
50‧‧‧ inner kit
51‧‧‧ slotting
52‧‧‧First set of holes
60‧‧‧Outer sleeve
61‧‧‧ ribs
62‧‧‧ round holes
63‧‧‧Second shaft tube
70‧‧ ‧ coil
71‧‧‧End
80‧‧‧First speed reduction mechanism
81‧‧‧First planetary gear
82‧‧‧First main gear
90‧‧‧Cover parts
91‧‧‧Group posts
92‧‧‧ recessed space
93‧‧‧second ring tooth
94‧‧‧through hole
100‧‧‧ linkages
101‧‧‧second disc
102‧‧‧Connected shaft
103‧‧‧Second set of holes
104‧‧‧ axle pin
110‧‧‧Second reduction mechanism
111‧‧‧Second planetary gear
112‧‧‧second main gear
200‧‧‧ track
300‧‧‧ mandrel
301‧‧‧ ring

In order to enable the review board to further understand the purpose, features, and effects of the present invention, a preferred embodiment of the present invention will be described below in detail with reference to the drawings: The scrolling device for the curtain provided by the example is assembled on the curtain track. The second drawing is a schematic cross-sectional view of the first figure in the direction of 2-2 and shows a longitudinal section of the scrolling device. The third picture is a perspective view of the scrolling device of the present curtain. The fourth figure is an exploded perspective view of one of the scrolling devices of the present creation. The fifth figure is an exploded perspective view of another perspective of the scrolling device of the present invention. Figure 6 is a cross-sectional view taken along line 6-6 of the third figure. Figure 7 is a cross-sectional view taken along line 7-7 of the third figure. The eighth figure is a cross-sectional view taken along line 8-8 of the third figure. The ninth and tenth drawings are schematic views of the action of the scrolling device of the present curtain.

Claims (9)

The utility model relates to a scrolling device for a curtain, comprising: a main body, comprising a shell seat and a shell, the shell seat is provided with a first chamber at one end and a second chamber at the other end, and the shaft is protruded from the second chamber The shaft has a shaft hole, the outer casing covers the first chamber; a driving member has a first disc and a driving portion disposed at the front end of the first disc, the driving member is mounted on In the housing, the first disc is disposed in the first chamber, the driving portion is disposed in the shaft and protrudes from the shaft hole thereof; a rotating disc is disposed in the first chamber And rotating, a core hole is disposed in a center of the rotating disk, and a circumferential surface of the core hole is provided with a first ring tooth portion, and a peripheral edge of the rotating disk can be wound around a pulling rope; a metal ring is sleeved on the An inner sleeve covering the metal ring and being assembled with the driving portion of the driving member, being rotatable by the driving member, and having at least one slot on a circumference thereof; an outer sleeve Nested in the inner sleeve and housed in the second chamber, the inner peripheral surface of which is provided with at least one rib, located in the inner sleeve In the slot, the outer sleeve is rotatable by the inner sleeve; at least one coil is sleeved on the metal ring and wrapped in the inner sleeve, and the two ends of the coils protrude outwardly and Between the slot of one of the inner sleeves and one of the ribs of the outer sleeve, the inner sleeve and the rib of the outer sleeve can push the ends of each coil; a first speed reduction mechanism is provided In the first chamber, the first planetary gear system is pivotally disposed on the first disk of the driving member, and the first ring tooth portion of the rotating disk and a first one disposed on the outer casing a main gear is engaged, when the pulling rope is pulled, the rotating disc will drive the first planetary gears and drive the driving member to rotate; an outer cover member is coupled to one end of the second chamber, The inner wall of the inner concave wall is provided with a second ring tooth portion; the connecting member has a second disc, and the second disc is accommodated in the concave space of the outer cover member; a second speed reduction mechanism is disposed in the concave space of the outer cover member, and includes a plurality of second planetary gear systems pivotally disposed on a second disc of the linking member is engageable with the second ring gear portion of the outer cover member, and a second main gear disposed on the outer sleeve, the second main body of the outer sleeve The gear drives the second planetary gears to rotate to interlock the linkage to rotate. The scrolling device for a curtain according to claim 1, wherein: the outer circumference of the shaft is provided with a plurality of longitudinal grooves, and the metal ring is provided with a plurality of positioning ribs on the inner circumference thereof, and the positioning ribs can be embedded in the Wait for the groove. The scrolling device for a curtain according to claim 2, wherein: a plurality of oil-retaining grooves are provided on a periphery of the metal ring. The scrolling device for a curtain according to claim 1, wherein the first speed reduction mechanism is configured to pivot a plurality of first planetary gears on the first disk of the driving member, and the outer circumferences of the first planetary gears are engaged a first shaft portion is protruded from a center of the inner side wall surface of the outer ring surface of the rotating disk, and the first shaft portion is circumferentially provided with an annular tooth to form the first main gear, and the first main gear and the first main gear Wait for the first planetary gear to mesh. The scrolling device for a curtain according to claim 1, wherein the second speed reducing mechanism is pivotally provided with a plurality of second planetary gears on the second disk of the linking member, and the outer circumference of the second planetary gears is engaged Connected to the second ring gear portion of the outer cover member, a second shaft tube protrudes from the outer wall surface of the outer sleeve, and the second shaft tube circumferential surface is provided with an annular tooth to form the second main gear, the second main gear Engaging with the second planetary gears. The scrolling device for a curtain according to claim 1, wherein: the inner sleeve is provided with two slots for maintaining a spacing; and the outer sleeve is provided with two ribs to maintain a space. The scrolling device for a curtain according to claim 1, wherein: the driving portion of the driving member is provided with a non-circular joint portion, and the inner sleeve is provided with a non-circular first group of connecting holes at the center, the driving member The coupling portion of the driving portion engages the first set of holes, the inner sleeve is rotatable by the driving member, and the outer sleeve is rotatable by the inner sleeve. The scrolling device for a curtain according to claim 1, wherein: one end of the outer cover member is provided with a through hole; the linking member has a connecting shaft protruding from the second disc, and the connecting shaft is threaded on the outer cover member Through hole. The scrolling device for a curtain according to any one of claims 1 to 8, wherein the pulling rope is a bead chain, and a plurality of slots are recessed in the outer periphery of the rotating disc for the bead chain to be embedded, or the pulling The tether is a pull cord, and the outer periphery of the rotating disc is provided with a ring groove for the drawstring to be wound.