A blind roller with a wire slot

Abstract

The application provides a blind curtain winding device with a wire slot, comprising a base, a winding drum and a ladder belt cover, the winding drum is used to drive the blades to lift, and the ladder belt cover is used to drive the ladder belt to lift to realize the rotation of the blades, a wire slot is arranged on the bottom of the base and penetrates through the base, and the wire slot is used for the power line or control line of the motor to pass through, so that the unreasonable wiring of the installation position of the power line or control line of the motor of the traditional blind curtain is solved, the internal space is effectively utilized, the internal space of the device is reasonably arranged, the structure is compact, the size of the overall structure of the device and the occupied space are reduced, and the product assembly and application are facilitated.

Description

Technical Field

[0001] This application relates to the field of Venetian blind components, and more specifically to a Venetian blind cord reel with a cord channel. Background Technology

[0002] Venetian blinds, in their use, need to achieve the dual effects of being able to be pulled up and down like curtains, and of blocking light through the rotation of the slats. Existing Venetian blinds use a ladder strap with a torsion spring to rotate to a certain extent, which drives the ladder strap to rise and fall, thus controlling the opening and closing of the slats.

[0003] However, traditional Venetian blind cord reels lack cable routing channels, forcing the motor power cord or control wire to run out of the mounting track and around the cord reel before connecting to the control or power module. This results in complex and unsightly wiring, and can easily cause interference between the power cord or control wire and the pull cord or ladder belt. The layout is also unreasonable and takes up more space, which is particularly prominent in space-constrained environments such as small windows or compact interior spaces. Therefore, improvements are urgently needed. Utility Model Content

[0004] The present invention aims to solve the problems of complex structure and unreasonable layout of existing Venetian blind cord reels. This application provides a Venetian blind cord reel with reasonable layout and compact structure and cord groove.

[0005] To achieve the above objectives, this application provides a cord winder for Venetian blinds with a cord groove, including a base. A cord winder for driving the slats up and down is rotatably mounted on the base. A ladder sleeve for driving the slats to rotate is swayably fitted on the outside of the cord winder. One end of the cord winder is provided with a rotating shaft that is rotatably connected to the base. One side of the ladder sleeve is provided with a bushing wall fitted on the rotating shaft. A cord groove for routing the cord is provided through the bottom of the base.

[0006] As described above, a Venetian blind cord reel with a cable tray includes a base plate, and the cable tray is formed at the bottom of the base plate and extends through it along its length.

[0007] As described above, a Venetian blind cord reel with cable trays has multiple cable trays spaced apart along its width on the base plate.

[0008] As described above, a cord winder for Venetian blinds with a cable tray has a wire hole in the center of the base plate, and ladder strip through holes are provided on both sides of the wire hole. A cable tray is provided between the ladder strip through hole and the wire hole.

[0009] As described above, a cord reel for a Venetian blind with a cord groove has a torsion spring sleeved on the rotating shaft between the cord drum and the shaft sleeve wall. The torsion spring can tighten or loosen the rotating shaft. Each end of the torsion spring has a braking end. The inner side of the ladder sleeve is provided with a braking part between the two braking ends. One side of the torsion spring is provided with a limiting part that can cooperate with the two braking ends respectively. When the rotating shaft is driven to rotate, either braking end on the torsion spring in the tightened state can abut against the braking part and drive the ladder sleeve to rotate synchronously. When the rotation continues until the other braking end abuts against the limiting part, the torsion spring expands outward and enters the loosened state.

[0010] As described above, a cord reel for a Venetian blind with a cord groove has an installation gap between the torsion spring and the inner wall of the bushing wall. A fastener is provided in the installation gap. The fastener is C-shaped and is fastened to the rotating shaft.

[0011] As described above, a cord reel for a Venetian blind with a cord groove is provided on the base, which is fitted around the outer periphery of the cord reel drum. A wire gap is formed between the cord control sleeve and the cord reel drum, and a wire channel is formed between the base and the cord control sleeve to communicate with the wire gap. The limiting part protrudes from the cord control sleeve.

[0012] As described above, a Venetian blind cord reel with a cord groove includes a connecting shaft section integrally connected to the cord drum, and a pivot shaft section protruding from the connecting shaft section and rotatably connected to the base. A torsion spring is sleeved on the connecting shaft section, and a shaft hole for sleeved on the bushing wall is provided.

[0013] As described above, a Venetian blind cord reel with a cord groove is provided on the cord sleeve, and two cord fixing rods are provided at intervals in the cord fixing groove. One end of each cord fixing rod forms a free end, and the cord fixing groove has an opening at the free end.

[0014] As described above, a Venetian blind cord reel with a cord groove has a cord reel at one end away from the pivot and a shaft plug that is rotatably connected to the base. The ladder sleeve has a ring sleeve wall that is sleeved on the shaft plug on one side away from the shaft sleeve wall. A cord fixing hook is provided on the shaft plug.

[0015] The base includes a base plate, one end of which is provided with a fixing plate and the other end with a support plate. The fixing plate is provided with a pivot hole for pivotally connecting the shaft plug, and the support plate is provided with a pivot interface for pivotally connecting the rotating shaft.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] This application provides a cord reel for Venetian blinds with a cable tray, including a base, a cord reel, and a ladder belt sleeve. The cord reel is used to drive the slats to rise and fall, and the ladder belt sleeve is used to drive the ladder belt to rise and fall to achieve slat rotation. By setting a through cable tray on the bottom of the base, the cable tray allows the motor power line or control line to pass through, solving the problem of unreasonable wiring of the motor power line or control line in traditional Venetian blinds. This application effectively utilizes the internal space, rationally lays out the internal space of the device, and has a compact structure, which helps to reduce the size and space occupied by the overall structure of the device, and facilitates product assembly and application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the structure of a Venetian blind cord reel with a cord groove in an embodiment of this application;

[0020] Figure 2 This is an exploded view of a Venetian blind cord reel with a cord groove in an embodiment of this application;

[0021] Figure 3 This is a top view of a Venetian blind cord reel with a cord groove in an embodiment of this application;

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross section along the AA direction;

[0023] Figure 5 This is a front view of a Venetian blind cord reel with a cord groove in an embodiment of this application;

[0024] Figure 6 yes Figure 5 Schematic diagram of the cross section along the BB direction;

[0025] Figure 7 yes Figure 5 A schematic diagram of the cross section as it rises along the BB direction;

[0026] Figure 8 yes Figure 5 A schematic diagram of the cross-section as it descends along the BB direction;

[0027] Figure 9 This is a schematic diagram of the structure of a Venetian blind cord reel with a cord groove hidden base and ladder sleeve in an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the ladder sleeve structure in an embodiment of this application;

[0029] Figure 11This is a schematic diagram of the base structure in an embodiment of this application;

[0030] In the diagram: Base 1, Support 11, Wire Hole 12, Plug-in 13, Ladder Belt Through Hole 14, Base Plate 15, Fixing Plate 16, Support Plate 17, Pivot Hole 18, Pivot Interface 19; Rope Drum 2, Rotating Shaft 21, Connecting Shaft Section 211, Pivot Shaft Section 212, Shaft Plug 22, Rope Fixing Hook 23; Ladder Belt Sleeve 3, Shaft Sleeve Wall 31, Shaft Hole 310, Braking Part 32, Ladder Belt Fixing Groove 33, Ladder Belt Fixing Rod 34, Opening 35, Ring Sleeve Wall 36, Edge Part 37; Torsion Spring 4, Braking End 41; Rope Winding Control Sleeve 5, Limiting Part 51, Wire Gap 52, Wire Channel 53, Plug-in Groove 54, Wire Through Hole 55; Buckle 6, Installation Gap 60; Pull Rope 7; Cable Tray 8. Detailed Implementation

[0031] This application provides a cord winder for Venetian blinds with a cable tray, including a base 1. A cord winder 2 for winding a pull cord 7 to drive the slats up and down is rotatably mounted on the base 1. The cord winder 2 can rotate in a limited clockwise or counterclockwise direction to adjust the height of the slats. A ladder belt sleeve 3 for driving the ladder belt to rotate the slats is swayably fitted on the outside of the cord winder 2. The ladder belt sleeve 3 can rotate 180° clockwise or counterclockwise to adjust the light by rotating the slats. One end of the cord winder 2 is provided with a rotating shaft 21 that is rotatably connected to the base 1. One side of the ladder belt sleeve 3 is provided with a bushing wall 31 fitted on the rotating shaft 21. A cable tray 8 for routing the cord is provided through the bottom of the base 1.

[0032] The cord reel for Venetian blinds with a cable tray according to this application includes a base, a cord reel, and a ladder belt sleeve. The cord reel is used to drive the slats to rise and fall, and the ladder belt sleeve is used to drive the ladder belt to rise and fall to achieve slat rotation. By setting a through cable tray on the bottom of the base, the cable tray allows the motor power line or control line to pass through, solving the problem of unreasonable wiring of the motor power line or control line in traditional Venetian blinds. This application effectively utilizes the internal space, rationally lays out the internal space of the device, and has a compact structure, which helps to reduce the size and space occupied by the overall structure of the device, and facilitates product assembly and application.

[0033] In a specific embodiment of this application, the base 1 includes a base plate 15, and the wiring groove 8 is formed at the bottom of the base plate 1 and extends through it along its length. This design is beneficial for utilizing the space of the cord reel and for rationally arranging the internal space of the device. It facilitates the arrangement of motor power lines or control lines, and solves the problem that traditional Venetian blind cord reels do not have wiring grooves, which means that motor power lines or control lines can only pass through the installation track and go around the cord reel from the outside before being electrically connected to the control module or power module, resulting in complicated and unsightly wiring.

[0034] Specifically, as a preferred embodiment, the base plate 15 is provided with multiple cable routing grooves 8 spaced apart along the width direction. This application provides multiple cable routing grooves at different positions on the width of the base. This design allows for selection of one for cable routing according to usage requirements, which is beneficial for selection based on the actual installation environment and improves the applicability of the product.

[0035] In a specific embodiment of this application, a wire hole 12 is provided in the middle of the base plate 15, and ladder belt through holes 14 are provided on both sides of the wire hole 12. A wiring groove 8 is provided between the ladder belt through hole 14 and the wire hole 12. The wiring groove 8 is located between the wire hole 12 and the ladder belt through hole 14, which does not affect the operation of the tension 7 and the ladder belt, and at the same time can make full use of the space of the rope roller, solving the problem that the power cord or control cord of the traditional Venetian blind rope roller is prone to interference with the pull cord or ladder belt.

[0036] Specifically, for existing cord reels, such as those disclosed in the following application numbers: CN201821049179.X, CN201921714987.8, CN202220866900.4, CN201620400234.X, the torsion spring is located on the outside of the cord reel sleeve, which occupies more space in the cord reel of the Venetian blind with the cord channel. This is particularly prominent in space-constrained application environments, such as small windows or compact interior spaces. To address the aforementioned issues, this application makes the following improvements: A torsion spring 4 is sleeved on the rotating shaft 21, located between the rope drum 2 and the bushing wall 31. The torsion spring 4 can tighten or loosen the rotating shaft 21. The torsion spring 4 is used for dimming and braking. Braking ends 41 are respectively provided at both ends of the torsion spring 4. A braking part 32 is provided on the inner side of the ladder belt sleeve 3 between the two braking ends 41. A limiting part 51 is provided on one side of the torsion spring 4, which can cooperate with the two braking ends 41 respectively. When external power drives the rotating shaft and the rope drum 2 to rotate, either braking end 41 on the torsion spring 4 in the tightened state can abut against the braking part 32. At this time, it enters the self-locking working mode. The torsion spring 4 drives the ladder belt sleeve 3 to rotate synchronously under the drive of the rotating shaft 21. When it continues to rotate until the other braking end 41 abuts against the limiting part 51, it enters the release working mode. The torsion spring 4 expands outward and enters the loosened state. The rotation of the rotating shaft 21 does not synchronously drive the ladder belt sleeve 3 to rotate synchronously.

[0037] The cord reel for Venetian blinds with a cord groove according to this application includes a base, a cord reel, a ladder belt sleeve, and a torsion spring. The cord reel is rotatably mounted on the base for winding the cord to drive the slats up and down. The ladder belt sleeve is swingably fitted on the outside of the cord reel for driving the ladder belt up and down to achieve rotational dimming of the slats. One end of the cord reel is rotatably mounted on the base via a pivot. The bushing wall on one side of the ladder belt sleeve is fitted on the pivot. The torsion spring is clamped or released on the pivot for dimming braking and is located between the inner walls of the cord reel and the bushing wall. This application places the torsion spring between the cord reel and the bushing wall, effectively utilizing the internal space, shortening the overall length of the device, and rationally arranging the internal space of the device. The structure is compact, which helps to reduce the overall size and space occupied by the device, and facilitates product assembly and application.

[0038] Furthermore, for ease of assembly, an installation gap 60 is provided between the torsion spring 4 and the inner wall of the bushing wall 31, and a fastening element 6 is provided within the installation gap 60. In a further preferred embodiment, the fastening element 6 is C-shaped and fastens to the rotating shaft 21. This application provides an installation gap to allow for installation and facilitate assembly. After the rope drum 2 is installed on the ladder belt sleeve 3, the fastening element 6 fills the installation gap, thus stably installing the torsion spring 4 between the rope drum and the ladder belt sleeve 3.

[0039] Specifically, the end of the rope drum 2 away from the rotating shaft 21 is provided with a shaft plug 22 that is rotatably connected to the base 1, and the side of the ladder belt sleeve 3 away from the bushing wall 31 is provided with an annular sleeve wall 36 that is fitted onto the shaft plug 22. The shaft plug 22 is provided with a rope fixing hook 23. The rotating shaft 21 includes a connecting shaft section 211 integrally connected to the rope drum 2, and a pivot shaft section 212 protruding from the connecting shaft section 211 and rotatably connected to the base 1. The torsion spring sleeve 4 is provided on the connecting shaft section 211, and the bushing wall 31 has a shaft hole 310 for fitting the connecting shaft section 211. During assembly, the torsion spring 4 is first sleeved on the connecting shaft section 211, and then the rotating shaft 21 is inserted into the shaft hole 310 of the bushing wall 31. At this time, there is an installation gap 60 between the torsion spring 4 and the inner wall of the bushing wall 31. Then, the buckle 6 is snapped into the installation gap 60, so that the torsion spring 4 can be stably installed between the rope drum and the ladder belt sleeve 3.

[0040] Furthermore, the base 1 is provided with a rope winding control sleeve 5 that fits around the outer periphery of the rope drum 2. A wire gap 52 is formed between the rope winding control sleeve 5 and the rope drum 2, and a wire channel 53 is formed between the base 1 and the rope winding control sleeve 5, communicating with the wire gap 52. Specifically, the width of the wire gap 52 is greater than the outer diameter of a single strand of pull rope 7 but less than the outer diameter of two strands of pull rope 7. After the pull rope 7 enters the wire gap 52 through the wire channel 53, it is tied to the pull rope fixing hook 23. When the rope drum 2 rotates, the pull rope 7 can be wound around through the rope winding control sleeve 5. After the torsion spring 4 is fitted onto the connecting shaft section 211, the rope winding control sleeve 5 needs to be fitted onto the outside of the rope drum 2 before the rope drum 2 is installed on the ladder belt sleeve 3.

[0041] In a preferred embodiment of this application, the limiting part 51 protrudes from the rope winding control sleeve 5. Existing structures place the limiting part on the base, which is inconvenient for manufacturing. This application integrates the limiting part 51, which restricts the rotation of the braking end 41 of the torsion spring 4, onto the edge of the rope winding control sleeve 5. This design simplifies the structure and facilitates manufacturing. The working principle of the torsion spring 4 in this application is as follows: Figure 6-8 As shown, in the initial state, the torsion spring 4 holds the rotating shaft 21 tightly. When the rope drum 2 is driven to rotate by external force, the torsion spring 4 rotates synchronously. The braking end 41 abuts against the braking part inside the ladder belt sleeve 3, thereby driving the ladder belt sleeve 3 to rotate together. When it continues to rotate until the braking end 41 at the other end abuts against the limiting part 51, the braking end 41 at the other end stops rotating, and then the torsion spring 4 expands outward to the loosened state of the rotating shaft 21. At this time, the ladder belt sleeve stops rotating synchronously. This application can realize the lifting and lowering of the ladder belt sleeve by forward and reverse rotation, thereby driving the curtain leaf to swing and realize dimming.

[0042] Furthermore, the base 1 is provided with a support part 11 for installing the rope control sleeve 5. In order to prevent the rope control sleeve 5 from shifting or tilting when installed on the support part 11, the inner wall of the ladder belt sleeve 3 of this application is provided with a retaining edge 37. The retaining edge 37 abuts against the rope control sleeve 5 to position and install the rope control sleeve 5 on the support part 11. Specifically, the retaining edge 37 is circular and abuts against the end of the rope control sleeve 5, making the installation more secure and the positioning of the rope control sleeve 5 stable.

[0043] The support portion 11 has a wire hole 12 in the middle, and a plug-in portion 13 protrudes from the support portion 11. The rope winding control sleeve 5 has a plug-in groove 54 that engages with the plug-in portion 13. The rope winding control sleeve 5 has a wire passage hole 55 at a position corresponding to the wire hole 12. The wire hole 12 and the wire passage hole 55 form the wire channel 53. In a specific embodiment of this application, the plug-in groove 54 and the wire passage hole 55 are connected and are T-shaped. The plug-in groove 54 is used to engage with the plug-in portion 13, and the wire passage hole 55 is used to engage with the wire hole 12 for wire passage. This design facilitates processing. The rope control sleeve 5 of this application is inserted into the support part. In order to prevent the rope control sleeve 5 from shifting or tilting when the insertion slot 54 is inserted into the insertion part 13, the inner wall of the ladder belt sleeve 3 of this application is provided with a retaining edge 37. The retaining edge 37 abuts against the rope control sleeve 5 to position and install the rope control sleeve 5 on the support part 11. This installation method is simple and more secure.

[0044] Furthermore, the ladder belt sleeve 3 is provided with a ladder belt fixing groove 33, and two ladder belt fixing rods 34 are spaced apart in the ladder belt fixing groove 33. One end of each ladder belt fixing rod 34 forms a free end, and the ladder belt fixing groove 33 is provided with an opening 35 at the free end. The base 1 is provided with ladder belt through holes 14 corresponding to the two ladder belt fixing rods 34. The ladder belt passes through the ladder belt through holes 14 and enters through the opening 35 and wraps around the ladder belt fixing rods 34. More preferably, the ladder belt sleeve 3 has clearance openings on both sides near the support part 11, and the two ladder belt through holes 14 are located on both sides of the support part 11 to facilitate the swinging of the ladder belt sleeve 3.

[0045] Furthermore, the base 1 includes a base plate 15, with a fixing plate 16 at one end and a support plate 17 at the other end. The fixing plate 16 has a pivot hole 18 for pivotally connecting the shaft plug 22, and the support plate 17 has a pivot interface 19 for pivotally connecting the rotating shaft 21. This design facilitates the installation of the rope reel.

[0046] The installation process of this application is as follows: The torsion spring 4 is sleeved on the connecting shaft section 211, and the rope control sleeve 5 is sleeved on the outside of the rope drum 2. The shaft plug 22 is fixed to the end of the rope drum 2. The pull rope 7 passes through the wire hole 12 and enters the wire gap 52, and is tied to the pull rope fixing hook 23. The connecting shaft end passes through the shaft hole 310, and the shaft plug 22 is sleeved on the ring sleeve wall 36. Then, the buckle 6 is placed into the installation gap 60 and fastened on the connecting shaft section 211. Finally, the shaft plug 22 is sleeved in the pivot hole 18, the pivot shaft section 212 is snapped into the pivot interface 19, and the plug part 13 is inserted into the plug groove 54. At this time, the edge of the rope control sleeve 5 abuts against the side stop 3. The ladder belt passes through the ladder belt through hole 14 and enters the ladder belt fixing groove 33, and then the ladder is fixed on the belt fixing rod 34, completing the installation.

[0047] The working process of this application is as follows: When the blades need to rise, such as Figure 7 As shown, driven by an external motor, the rotating shaft 21 rotates clockwise, and the rope drum 2 winds the pull rope 7, causing the blades to gradually retract. At this time, the torsion spring 4, which is tightly gripping the rotating shaft 21, rotates clockwise along with the rotating shaft 21. When the upper brake end 41 abuts against the brake part 32 on the ladder belt sleeve 3, the ladder belt sleeve 3 enters a self-locking state and rotates clockwise under the drive of the torsion spring 4. At this time, the left ladder belt rises and the right ladder belt descends, thereby causing the blades connected to the two ladder belts to rise on the left and descend on the right, realizing blade dimming. When the torsion spring 4 continues to rotate until the lower brake end 41 abuts against the limit part 51, the torsion spring 4 expands outward and enters a loosened state, and the ladder belt sleeve 3 enters a released state. When the blades need to descend, as Figure 8 As shown, its working process is the opposite of the upward process.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cord reel for Venetian blinds with a cord channel, characterized in that: The device includes a base on which a rope drum for driving the blades to rise and fall is rotatably mounted. A ladder belt sleeve for driving the blades to rotate is swayably fitted on the outside of the rope drum. One end of the rope drum is provided with a rotating shaft that is rotatably connected to the base. One side of the ladder belt sleeve is provided with a bushing wall fitted on the rotating shaft. A cable routing groove for cable routing is provided through the bottom of the base.

2. The cord reel for Venetian blinds with a cord channel as described in claim 1, characterized in that: The base includes a base plate, and the wiring groove is formed at the bottom of the base plate and extends through it along its length.

3. The cord reel for Venetian blinds with a cord channel as described in claim 2, characterized in that: The base plate is provided with multiple cable routing grooves spaced apart along its width.

4. A cord reel for Venetian blinds with a cord channel as described in claim 3, characterized in that: The base plate has a wire hole in the middle, and ladder strip through holes are provided on both sides of the wire hole. A wiring groove is provided between the ladder strip through hole and the wire hole.

5. A cord reel for Venetian blinds with a cord channel as described in any one of claims 1-4, characterized in that: A torsion spring is sleeved on the rotating shaft between the rope drum and the bushing wall. The torsion spring can tighten or loosen the rotating shaft. Each end of the torsion spring has a braking end. A braking part is provided on the inner side of the ladder belt sleeve between the two braking ends. A limiting part is provided on one side of the torsion spring that can cooperate with the two braking ends respectively. When the rotating shaft is driven to rotate, either braking end on the torsion spring in the tightened state can abut against the braking part and drive the ladder belt sleeve to rotate synchronously. When it continues to rotate until the other braking end abuts against the limiting part, the torsion spring expands outward and enters the loosened state.

6. A cord reel for Venetian blinds with a cord channel as described in claim 5, characterized in that: There is an installation gap between the torsion spring and the inner wall of the bushing, and a fastener is provided in the installation gap. The fastener is C-shaped and is fastened to the rotating shaft.

7. A cord reel for Venetian blinds with a cord channel as described in claim 5, characterized in that: The base is provided with a rope winding control sleeve that is fitted around the outer periphery of the rope winding drum. A wire gap is formed between the rope winding control sleeve and the rope winding drum. A wire channel is formed between the base and the rope winding control sleeve that communicates with the wire gap. The limiting part protrudes from the rope winding control sleeve.

8. A cord reel for Venetian blinds with a cord channel as described in claim 5, characterized in that: The rotating shaft includes a connecting shaft section integrally connected to the rope drum, and a pivot shaft section protruding from the connecting shaft section and rotatably connected to the base. The torsion spring is sleeved on the connecting shaft section, and the bushing wall has a shaft hole for sleeved on the connecting shaft section.

9. A cord reel for Venetian blinds with a cord channel as described in claim 5, characterized in that: The ladder belt sleeve is provided with a ladder belt fixing groove, and two ladder belt fixing rods are spaced apart in the ladder belt fixing groove. One end of each ladder belt fixing rod forms a free end, and the ladder belt fixing groove is provided with an opening at the free end.

10. A cord reel for Venetian blinds with a cord channel as described in claim 5, characterized in that: The end of the rope drum away from the rotating shaft is provided with a shaft plug that is rotatably connected to the base. The side of the ladder belt sleeve away from the shaft sleeve wall is provided with a ring sleeve wall that is sleeved on the shaft plug. The shaft plug is provided with a rope fixing hook. The base includes a base plate, one end of which is provided with a fixing plate and the other end with a support plate. The fixing plate is provided with a pivot hole for pivotally connecting the shaft plug, and the support plate is provided with a pivot interface for pivotally connecting the rotating shaft.

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