Automatic umbrella opening mechanism with stable structure and automatic opening and closing umbrella

Abstract

The present invention discloses an automatic umbrella opening mechanism with a stable structure, comprising an umbrella handle and an opening and closing device, wherein the opening and closing device comprises a flexible steel bar, a telescopic connecting member and a steel bar driving device arranged at the lower end of the umbrella handle, the upper end of the flexible steel bar is connected to the upper end of the umbrella handle and the lower end is connected to the steel bar driving device, the upper end of the telescopic connecting member is connected to the upper end of the umbrella handle and the lower end is connected to the lower end of the umbrella handle, the telescopic connecting member comprises a connecting unit and a spring, the upper end of the connecting unit is provided with a connecting groove, the lower end of the connecting unit is provided with a connecting protrusion, and the connecting unit is provided with a fixing hole for the flexible steel bar to pass through. Compared with the prior art, the telescopic mechanism of the present invention has a firm and compact structure, and can realize the stable extension and retraction of the umbrella handle. The present invention also discloses an automatic opening and closing umbrella, further comprising an umbrella rib and an umbrella cover, the umbrella rib is connected to an upper nest and a lower nest, and the umbrella cover is connected to the umbrella rib. Compared with the prior art, the automatic opening and closing umbrella can be opened and closed automatically and stably, has a high structural strength, and is convenient to open and close.

Description

Technical Field

[0001] The invention relates to the field of umbrellas, and in particular to an automatic umbrella opening mechanism with a stable structure and an automatic opening and closing umbrella. Background Art

[0002] An umbrella is a tool for shading or shielding against rain and snow. Umbrellas require both hands to open and close, which is very inconvenient to use. Therefore, people have developed umbrellas that can open and close automatically. Existing automatic umbrellas mainly use a screw structure or a flexible rack to drive the umbrella handle to automatically extend and retract. However, for umbrellas that open and close with a screw structure, the nut is easily stuck with the screw, making the lifting of the umbrella handle very unstable. For umbrellas that open and close with a flexible rack, since the flexible rack is relatively soft, the flexible rack is easy to bend when the umbrella handle is extended, causing the flexible rack to lose its support force instantly, which can easily cause the rack to be damaged and the umbrella cannot be opened automatically.

[0003] In view of this, the applicant conducted in-depth research on the above issues, which led to the present case. Summary of the invention

[0004] One object of the present invention is to provide an automatic umbrella opening mechanism with a stable structure, which is firm and compact and can realize the smooth extension and retraction of the umbrella handle.

[0005] A second object of the present invention is to provide an automatic opening and closing umbrella which can open and close automatically and smoothly, has high structural strength, and is easy to open and close.

[0006] In order to achieve the above object, the solution of the present invention is:

[0007] A structurally stable automatic umbrella opening mechanism comprises a retractable umbrella handle and an opening and closing device for driving the umbrella handle to be retracted and extended, wherein the opening and closing device comprises a flexible steel bar, a retractable connecting piece and a steel bar driving device, the steel bar driving device is arranged at the lower end of the umbrella handle, one end of the flexible steel bar is connected to the upper end of the umbrella handle and the other end is connected to the steel bar driving device, the upper end of the retractable connecting piece is connected to the upper end of the umbrella handle and the lower end is connected to the lower end of the umbrella handle, the retractable connecting piece comprises a connecting unit and a spring, the upper end of the connecting unit is provided with a connecting groove connected to the spring, the lower end of the connecting unit is provided with a connecting protrusion connected to the spring, and the connecting unit is provided with a fixing hole for the flexible steel bar to pass through.

[0008] Furthermore, a connecting rod is provided at the lower end of the connecting protrusion, the spring is sleeved on the connecting rod, and a connecting rod clearance hole for the connecting rod to extend into is provided at the bottom of the connecting groove.

[0009] Furthermore, the connecting rod is provided with a fixing boss protruding toward the outer circumferential surface, and the upper end of the spring is provided with a fixing sleeve sleeved on the fixing boss.

[0010] Furthermore, the lower end of the connecting rod has a guide tip, and the side wall of the guide tip gradually inclines toward the center of the guide tip from top to bottom.

[0011] Furthermore, a connecting piece is provided at the lower end of the spring, and the connecting piece is connected to the bottom of the connecting groove.

[0012] Furthermore, the connecting piece and the bottom of the connecting groove are fixed by screws.

[0013] Furthermore, the diameter of the spring gradually decreases from top to bottom.

[0014] Furthermore, the side wall of the connecting protrusion gradually inclines toward the center of the connecting protrusion from top to bottom, and the inner side wall of the connecting groove gradually inclines toward the center of the connecting groove from top to bottom.

[0015] Furthermore, the cross section of the flexible steel strip is an arc-shaped surface structure with the middle portion arched outwards.

[0016] Furthermore, the umbrella handle includes a lower section, a middle section sleeved on the lower section, and an upper section sleeved on the middle section, a mounting handle is provided at the lower end of the lower section, and the steel bar driving device is arranged on the mounting handle.

[0017] Furthermore, the opening and closing device also includes an upper nest, a lower nest, a pull rope, a fixed pulley and a reset spring. The upper nest is arranged at the upper end of the upper section, the lower nest is sleeved on the upper section, the fixed pulley is rotatably connected to the upper end of the upper section, the pull rope is wound around the fixed pulley, one end of the pull rope is connected to the upper end of the middle section and the other end is connected to the lower nest, the reset spring is sleeved on the upper section, and the upper and lower ends of the reset spring are respectively against the upper nest and the lower nest.

[0018] Furthermore, a clamp is provided at one end of the pull rope, and the upper end of the inner side wall of the middle section has an inwardly protruding clamp ring, and the clamp is clamped in the clamp ring; the lower nest is provided with a fixed installation hole, and the other end of the pull rope is embedded in the fixed installation hole.

[0019] Furthermore, the upper nest includes a fixed block fixed to the upper end of the upper section, the fixed block has a receiving groove for receiving the fixed pulley, a first rotating shaft is provided on the side wall of the receiving groove, and the fixed pulley is sleeved on the first rotating shaft.

[0020] Furthermore, a fixing groove for inserting a flexible steel bar is provided at the lower end of the fixing block, a fixing cavity connected to the fixing groove is opened on the outer side surface of the fixing block, a fixing protrusion protruding into the fixing cavity is provided on the groove wall of the fixing groove, and a fixing through hole corresponding to the fixing protrusion is provided at the upper end of the flexible steel bar.

[0021] Furthermore, the steel bar driving device includes a motor, a worm, a turbine and a driving gear. The mounting handle is provided with a connected mounting cavity, a mounting slot and a mounting hole. The mounting cavity is provided with a second rotating shaft. The driving gear and the turbine are sleeved on the second rotating shaft. The motor is arranged in the mounting hole. The power output end of the motor is connected to the worm, and the worm is meshingly connected to the turbine. The flexible steel bar is inserted into the mounting slot, and driving teeth are provided on the outer circumferential surface of the driving gear. The side of the flexible steel bar is provided with a driving through hole that cooperates with the driving teeth.

[0022] Furthermore, the opening and closing device also includes a volute spring, and a mounting plate is also provided at the lower end of the mounting handle, a recovery shell is provided on the mounting plate, and the volute spring is arranged in the recovery shell.

[0023] Furthermore, the upper end of the mounting handle is also provided with an umbrella handle connecting groove for the lower section to be inserted.

[0024] After adopting the above structure, when the umbrella handle is extended, the steel bar driving device drives the flexible steel bar to press against the upper end of the umbrella handle and move upward, so that the umbrella handle is continuously extended upward. When the umbrella handle is extended, the telescopic connecting piece is driven to extend upward together. When the umbrella handle is retracted, the steel bar driving device drives the flexible steel bar to drive the upper end of the umbrella handle to move downward, so that the umbrella handle is continuously retracted downward, and when the umbrella handle is retracted, the telescopic connecting piece is driven to move downward together.

[0025] Compared with the prior art, the present invention has a compact structure, drives the umbrella handle to extend and retract through a flexible steel bar, and is provided with a telescopic connector inside the umbrella handle, which evenly tightens the flexible steel bar and extends and retracts along with the flexible steel bar. In this way, the flexible steel bar is not easy to bend when extended, and the supporting force of the flexible steel bar is enhanced, so that the extension of the umbrella handle is more stable and smooth. In addition, when the umbrella handle is extended, the connecting monomers in the telescopic connector are relatively far away from the spring to be pulled to a taut state, so that the telescopic connector has a certain rigidity, thereby having a certain supporting effect on the umbrella handle, which can enhance the overall structural strength of the umbrella handle and increase the service life of the umbrella handle. When the umbrella handle is retracted, the connecting monomers are close to each other under the elastic force of the spring, which facilitates the shortening and recovery of the telescopic connector.

[0026] An automatic opening and closing umbrella using the above-mentioned umbrella handle telescopic mechanism, wherein it also includes umbrella ribs and an umbrella surface, wherein the umbrella ribs are connected to an upper nest and a lower nest, and the umbrella surface is connected to the umbrella ribs.

[0027] After adopting the above structure, compared with the prior art, the automatic opening and closing umbrella can be opened and closed automatically and smoothly, has high structural strength, and is easy to open and close. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of the appearance structure of the umbrella opening mechanism of the present invention when it is folded.

[0029] Figure 2 It is a three-dimensional diagram of the appearance structure of the umbrella opening mechanism of the present invention when it is extended.

[0030] Figure 3 It is a schematic structural cross-sectional view of the umbrella opening mechanism of the present invention when it is folded.

[0031] Figure 4 It is a schematic structural cross-sectional view of the umbrella opening mechanism of the present invention when it is extended.

[0032] Figure 5 for Figure 4 A partial enlarged view of area A.

[0033] Figure 6 for Figure 4 A partial enlarged view of area B in the middle. DETAILED DESCRIPTION

[0034] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0035] like Figure 1-6 As shown, a structurally stable automatic umbrella opening mechanism comprises a retractable umbrella handle 1 and an opening and closing device for driving the umbrella handle 1 to retract, wherein the opening and closing device comprises a flexible steel bar 2, a retractable connecting member 3 and a steel bar driving device 4, the steel bar driving device 4 is arranged at the lower end of the umbrella handle 1, one end of the flexible steel bar 2 is connected to the upper end of the umbrella handle 1 and the other end is connected to the steel bar driving device 4, the upper end of the retractable connecting member 3 is connected to the upper end of the umbrella handle 1 and the lower end is connected to the lower end of the umbrella handle 1, the retractable connecting member 3 comprises a plurality of connecting monomers 31 and springs 32 arranged up and down, and adjacent connecting monomers 31 are connected by springs 32, The upper end of the connecting monomer 31 is provided with a connecting groove 312 connected to the lower end of the spring 32, and the lower end of the connecting monomer 31 is provided with a connecting protrusion 311 connected to the upper end of the spring 32. The connecting protrusion 311 is slidably connected in the connecting groove 312, so that the sliding between the connecting monomers 31 is smoother, and the structural strength of the telescopic connecting member 3 is higher, which can play a role in supporting the umbrella handle 1. The connecting monomer 31 is provided with a fixing hole 313 for the flexible steel bar 2 to pass through and slide connected. Every small distance on the flexible steel bar 2 can be fixed through the fixing hole 313, thereby effectively preventing the flexible steel bar 2 from bending.

[0036] With the above structure, when the umbrella handle 1 is extended, the steel bar driving device 4 drives the flexible steel bar 2 to press against the upper end of the umbrella handle 1 and move upward, so that the umbrella handle 1 is continuously extended upward. When the umbrella handle 1 is extended, the telescopic connecting member 3 is driven to extend upward together. When the umbrella handle 1 is retracted, the steel bar driving device 4 drives the flexible steel bar 2 to drive the upper end of the umbrella handle 1 to move downward, so that the umbrella handle 1 is continuously retracted downward, and when the umbrella handle 1 is retracted, the telescopic connecting member 3 is driven to move downward together.

[0037] Compared with the prior art, the present invention has a compact structure. The flexible steel bar 2 drives the umbrella handle 1 to extend and retract, and a telescopic connector 3 is provided inside the umbrella handle 1. The telescopic connector 3 evenly tightens the flexible steel bar 2 and extends and retracts with the flexible steel bar 2. In this way, the flexible steel bar 2 is not easy to bend when extending, and the supporting force of the flexible steel bar 2 is enhanced, so that the umbrella handle 1 extends more steadily and smoothly. In addition, when the umbrella handle 1 is extended, the connecting monomer 31 in the telescopic connector 3 is relatively far away from the spring 32 to be pulled to a taut state, so that the telescopic connector 3 has a certain rigidity, thereby having a certain supporting effect on the umbrella handle 1, and can enhance the overall structural strength of the umbrella handle 1 and increase the service life of the umbrella handle 1. When the umbrella handle 1 is retracted, the connecting monomers 31 are close to each other under the elastic force of the spring 32, which facilitates the shortening and recovery of the telescopic connector 3.

[0038] Preferably, a connecting rod 314 is provided at the lower end of the connecting protrusion 311, and the spring 32 is sleeved on the connecting rod 314. A connecting rod clearance hole 316 is provided at the bottom of the connecting groove 312 for the connecting rod 314 to extend into. When the telescopic connecting member 3 is shortened, the connecting rod 314 is inserted into the connecting rod clearance hole 316. With the above structure, the spring 32 is prevented from bending and deforming in the connecting groove 312, the structural strength of the spring 32 is enhanced, and the connection between the spring 32 and the connecting monomer 31 is made more firmly.

[0039] Preferably, the connecting rod 314 is provided with a fixed boss 315 protruding toward the outer circumferential surface, and the upper end of the spring 32 is provided with a fixed sleeve 321 sleeved on the fixed boss 315. After adopting the above structure, the upper end of the spring 32 is more firmly connected to the connecting rod 314, further improving the structural strength of the telescopic connecting member 3.

[0040] Preferably, the lower end of the connecting rod 314 has a guide tip, and the side wall of the guide tip gradually inclines toward the center of the guide tip from top to bottom. After adopting the above structure, when the telescopic connecting member 3 retracts, the connecting rod 314 can be more easily inserted into the middle of the spring 32, thereby facilitating the folding of the telescopic connecting member 3.

[0041] Preferably, a connecting piece 322 is provided at the lower end of the spring 32, and the connecting piece 322 is connected to the bottom of the connecting groove 312. More specifically, the connecting piece 322 and the bottom of the connecting groove 312 are locked by screws. With the above structure, the lower end of the spring 32 is more firmly connected to the connecting rod 314, further improving the structural strength of the telescopic connector 3. It is also more convenient to disassemble and assemble.

[0042] Preferably, the diameter of the spring 32 gradually decreases from top to bottom. With the above structure, the spring 32 is a conical helical spring 32, which has greater lateral stability, can prevent the spring 32 from bending, and when the telescopic connector 3 retracts, the connecting rod 314 can be more easily inserted into the middle of the spring 32.

[0043] Preferably, the side wall of the connecting protrusion 311 gradually tilts toward the center of the connecting protrusion 311 from top to bottom, and the inner side wall of the connecting groove 312 gradually tilts toward the center of the connecting groove 312 from top to bottom. With the above structure, the connecting protrusion 311 and the connecting groove 312 are conical structures, and when the telescopic connector 3 is extended or retracted, the connecting protrusion 311 of the connecting monomer 31 at the upper end can be more easily inserted into the connecting groove 312 of the connecting monomer 31 at the lower end, thereby positioning the connecting monomers 31 adjacent to each other upward and downward to avoid displacement when the connecting monomers 31 are close to each other.

[0044] Preferably, the cross section of the flexible steel bar 2 is an arc-shaped surface structure with the middle portion arched outward. With the above structure, the flexible steel bar 2 has a better supporting effect when extending and contracting, and can further prevent the flexible steel bar 2 from bending.

[0045] Preferably, the umbrella handle 1 includes a lower section 11, a middle section 12 sleeved on the lower section 11, and an upper section 13 sleeved on the middle section 12. A mounting handle 14 is provided at the lower end of the lower section 11, and the steel bar driving device 4 is arranged on the mounting handle 14.

[0046] Preferably, the opening and closing device also includes an upper nest 51, a lower nest 52, a pull rope 53, a fixed pulley 54 and a reset spring (not shown in the figure), the upper nest 51 is arranged at the upper end of the upper section 13, the lower nest 52 is sleeved on the upper section 13, the fixed pulley 54 is rotatably connected to the upper end of the upper section 13, the pull rope 53 is wound around the fixed pulley 54, one end of the pull rope 53 is connected to the upper end of the middle section 12 and the other end is connected to the lower nest 52, the reset spring is sleeved on the upper section 13, and the upper and lower ends of the reset spring are respectively against the upper nest 51 and the lower nest 52. After adopting the above structure, when opening the umbrella, the steel bar driving device 4 drives the flexible steel bar 2 to push against the upper section 13 and move upward, so that the upper end of the upper section 13 is away from the upper end of the middle section 12, and the pull rope 53 is wrapped around the fixed pulley 54 to pull the lower nest 52 close to the upper nest 51, thereby realizing opening the umbrella; when closing the umbrella, the steel bar driving device 4 drives the flexible steel bar 2 to drive the upper section 13 to move downward, so that the upper end of the upper section 13 is close to the upper end of the middle section 12, and the upper nest 51 pushes against the lower nest 52 and moves away from the upper nest 51 under the elastic force of the reset spring, thereby realizing closing the umbrella.

[0047] Preferably, a clamp 531 is provided at one end of the pull rope 53, and the upper end of the inner side wall of the middle section 12 has an inwardly protruding clamp ring 121, and the clamp 531 is clamped in the clamp ring 121; the lower nest 52 is provided with a fixed installation hole 521, and the other end of the pull rope 53 is embedded in the fixed installation hole 521, and then an adhesive can be used to bond to prevent the pull rope 53 from falling off. The above structure makes the pull rope 53 more convenient to install and more firmly connected.

[0048] Preferably, the upper nest 51 includes a fixed block 511 fixed to the upper end of the upper section 13, the upper nest 51 is provided with a sleeve portion in which the fixing sleeve 321 is provided outside the upper section 13, the fixed block 511 is provided in the sleeve portion, and the lower end surface of the fixed block 511 is also provided with a connecting protrusion 311 embedded in the connecting groove 312, so that the fixed block 511 is more firmly connected to the telescopic connector 3. The fixed block 511 has a receiving groove 512 for receiving the fixed pulley 54, and the receiving groove 512 forms an opening for the pull rope 53 to extend in and out on the lower surface and the outer side surface of the fixed block 511, and a first rotating shaft is provided on the side wall of the receiving groove 512, and the fixed pulley 54 is sleeved on the first rotating shaft.

[0049] Preferably, the lower end of the fixing block 511 is provided with a fixing groove 513 for inserting the flexible steel bar 2, the outer side of the fixing block 511 is provided with a fixing cavity 514 connected with the fixing groove 513, the groove wall of the fixing groove 513 is provided with a fixing protrusion 515 protruding into the fixing cavity 514, and the upper end of the flexible steel bar 2 is provided with a fixing through hole corresponding to the fixing protrusion 515. With the above structure, the connection between the flexible steel bar 2 and the fixing block 511 is more firmly established.

[0050] Preferably, in this embodiment, the steel bar driving device 4 includes a motor 41, a worm 42, a turbine 43 and a driving gear 44. The mounting handle 14 is provided with a connecting mounting cavity 141, a mounting slot 142 and a mounting hole 143. The mounting cavity 141 is provided with a second rotating shaft. The driving gear 44 and the turbine 43 are sleeved on the second rotating shaft. The motor 41 is arranged in the mounting hole 143. The power output end of the motor 41 extends into the mounting cavity 141 and is connected to the worm 42. The worm 42 is meshed with the turbine 43. The flexible steel bar 2 is inserted into the mounting slot 142 and is slidably connected. The outer circumferential surface of the driving gear 44 is provided with a driving tooth. The side of the flexible steel bar 2 is provided with a driving through hole 21 that cooperates with the driving tooth. When working, the motor 41 rotates to drive the worm 42 to drive the turbine 43 to rotate, and at the same time, the driving gear 44 is driven to rotate. The driving gear 44 drives the flexible steel bar 2 to rise or fall through the meshing of the driving tooth and the driving through hole 21. The above structure is compact and has a larger transmission ratio.

[0051] Preferably, the opening and closing device further comprises a scroll spring 6, a mounting plate 144 is further provided at the lower end of the mounting handle 14, a recovery housing 145 is provided on the mounting plate 144, and the scroll spring 6 is arranged in the recovery housing 145. With the above structure, when closing the umbrella, the scroll spring 6 pulls the flexible steel strip 2 back into the recovery housing 145, making it more convenient to recover the flexible steel strip 2, while protecting the flexible steel strip 2.

[0052] Preferably, the upper end of the mounting handle 14 is also provided with an umbrella handle connecting groove 146 for inserting the lower section 11. After adopting the above structure, the connection between the lower section 11 and the mounting handle 14 is more firmly established.

[0053] An automatic opening and closing umbrella using the above-mentioned umbrella handle 1 telescopic mechanism, wherein it also includes an umbrella rib and an umbrella cover, the umbrella rib is connected to the upper nest 51 and the lower nest 52, and the umbrella cover is connected to the umbrella rib.

[0054] After adopting the above structure, compared with the prior art, the automatic opening and closing umbrella can be opened and closed automatically and smoothly, has high structural strength, and is easy to open and close.

[0055] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An automatic umbrella opening mechanism with a stable structure, comprising a retractable umbrella handle and an opening and closing device for driving the umbrella handle to retract, characterized in that: The opening and closing device includes a flexible steel bar, a telescopic connecting member and a steel bar driving device, wherein the steel bar driving device is arranged at the lower end of the umbrella handle, one end of the flexible steel bar is connected to the upper end of the umbrella handle and the other end is connected to the steel bar driving device, the upper end of the telescopic connecting member is connected to the upper end of the umbrella handle and the lower end is connected to the lower end of the umbrella handle, the telescopic connecting member includes a connecting monomer and a spring, the upper end of the connecting monomer is provided with a connecting groove connected to the spring, the lower end of the connecting monomer is provided with a connecting protrusion connected to the spring, and the connecting monomer is provided with a fixing hole for the flexible steel bar to pass through; The side wall of the connecting protrusion is gradually inclined toward the center of the connecting protrusion from top to bottom, and the inner side wall of the connecting groove is gradually inclined toward the center of the connecting groove from top to bottom; a connecting rod is provided at the lower end of the connecting protrusion, the spring is sleeved on the connecting rod, a connecting rod clearance hole for the connecting rod to extend into is provided at the bottom of the connecting groove, a fixing boss protruding toward the outer circumferential surface is provided on the connecting rod, a fixing sleeve sleeved on the fixing boss is provided at the upper end of the spring, and a guide tip is provided at the lower end of the connecting rod, and the side wall of the guide tip is gradually inclined toward the center of the guide tip from top to bottom.

2. The automatic umbrella opening mechanism with a stable structure as claimed in claim 1, characterized in that: A connecting piece is provided at the lower end of the spring, and the connecting piece is connected to the groove bottom of the connecting groove.

3. The automatic umbrella opening mechanism with a stable structure as claimed in claim 2, characterized in that: The connecting piece and the bottom of the connecting groove are locked by screws.

4. The automatic umbrella opening mechanism with a stable structure as claimed in claim 1, characterized in that: The diameter of the spring gradually decreases from top to bottom.

5. The automatic umbrella opening mechanism with a stable structure as claimed in claim 1, characterized in that: The cross section of the flexible steel strip is an arc-shaped surface structure with the middle portion arched outwards.

6. The automatic umbrella opening mechanism with a stable structure as claimed in claim 1, characterized in that: The umbrella handle comprises a lower section, a middle section sleeved on the lower section, and an upper section sleeved on the middle section. A mounting handle is arranged at the lower end of the lower section, and the steel bar driving device is arranged on the mounting handle.

7. The automatic umbrella opening mechanism with a stable structure as claimed in claim 6, characterized in that: The opening and closing device also includes an upper nest, a lower nest, a pull rope, a fixed pulley and a reset spring. The upper nest is arranged at the upper end of the upper section, the lower nest is sleeved on the upper section, the fixed pulley is rotatably connected to the upper end of the upper section, the pull rope is wound around the fixed pulley, one end of the pull rope is connected to the upper end of the middle section and the other end is connected to the lower nest, the reset spring is sleeved on the upper section, and the upper and lower ends of the reset spring are respectively against the upper nest and the lower nest.

8. The automatic umbrella opening mechanism with a stable structure as claimed in claim 7, characterized in that: One end of the pull rope is provided with a clamp, the upper end of the inner side wall of the middle section has an inwardly protruding clamp ring, and the clamp is clamped in the clamp ring; the lower nest is provided with a fixed installation hole, and the other end of the pull rope is embedded in the fixed installation hole.

9. The automatic umbrella opening mechanism with a stable structure as claimed in claim 6, characterized in that: The upper nest comprises a fixed block fixed to the upper end of the upper section, the fixed block has a receiving groove for receiving a fixed pulley, a first rotating shaft is arranged on the side wall of the receiving groove, and the fixed pulley is sleeved on the first rotating shaft.

10. The automatic umbrella opening mechanism with a stable structure as claimed in claim 9, characterized in that: The lower end of the fixing block is provided with a fixing groove for inserting the flexible steel bar, the outer side surface of the fixing block is provided with a fixing cavity connected to the fixing groove, the groove wall of the fixing groove is provided with a fixing protrusion protruding into the fixing cavity, and the upper end of the flexible steel bar is provided with a fixing through hole corresponding to the fixing protrusion.

11. The automatic umbrella opening mechanism with a stable structure as claimed in claim 6, characterized in that: The steel bar driving device includes a motor, a worm, a turbine and a driving gear. A connected mounting cavity, a mounting slot and a mounting hole are provided in the mounting handle. A second rotating shaft is provided in the mounting cavity. The driving gear and the turbine are sleeved on the second rotating shaft. The motor is provided in the mounting hole. The power output end of the motor is connected to the worm, and the worm is meshingly connected to the turbine. The flexible steel bar is passed through the mounting slot, and driving teeth are provided on the outer circumferential surface of the driving gear. A driving through hole matching the driving teeth is provided on the side of the flexible steel bar.

12. The automatic umbrella opening mechanism with a stable structure as claimed in claim 11, characterized in that: The opening and closing device also includes a volute spring. The lower end of the mounting handle is also provided with a mounting plate. The mounting plate is provided with a recovery shell. The volute spring is arranged in the recovery shell.

13. The automatic umbrella opening mechanism with a stable structure as claimed in claim 12, characterized in that: The upper end of the mounting handle is also provided with an umbrella handle connecting groove for the lower section to be inserted.

14. An automatic opening and closing umbrella using the umbrella handle telescopic mechanism according to claims 1-13, characterized in that: It also includes umbrella ribs and umbrella covers, wherein the umbrella ribs are connected to the upper nest and the lower nest, and the umbrella cover is connected to the umbrella ribs.

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