Folding umbrella

Abstract

The utility model discloses a folding umbrella which comprises a central supporting rod and a top frame capable of being unfolded and folded relative to the central supporting rod. The folding umbrella further comprises a handle mechanism, the handle mechanism comprises a rocking handle and a grab handle, and the rocking handle is rotationally connected with the center supporting rod. The folding umbrella further comprises a containing cavity. The grab handle is movably connected with the rocking handle; the handle mechanism has a first state and a second state, and in the first state, the grab handle is contained in the containing cavity, so that the handle mechanism is more attractive, and meanwhile, the grab handle can be prevented from being touched by mistake; in the second state, the grab handle is transverse to the rocking handle so that a person can hold and operate the handle mechanism to enable the rocking handle to rotate relative to the center supporting rod.

Description

Technical Field

[0001] The utility model relates to a folding umbrella. Background Art

[0002] Some folding umbrellas are provided with a rotating handle on the support rod. For example, some folding umbrellas control the expansion and folding of the top frame by operating the rotating handle. The rotating handle usually includes a crank that can rotate relative to the support rod and a grip for the user to hold. When in use, the user holds the grip to drive the crank to rotate. The extension direction of the grip is usually at an angle to the support rod to facilitate user operation. However, when the rotating handle is not in use, the grip protrudes from one side of the support rod, which not only affects the appearance of the folding umbrella, but also easily collides with the user under the umbrella, resulting in poor safety. At the same time, if the grip is accidentally touched by someone, it may affect the state of the folding umbrella, making the folding umbrella less stable. Utility Model Content

[0003] The purpose of the utility model is to provide a new folding umbrella.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a folding umbrella, comprising:

[0005] Center support rod,

[0006] a top frame capable of being expanded and collapsed relative to the central support rod;

[0007] The folding umbrella further includes a handle mechanism, which includes a crank and a grip, and the crank is rotatably connected to the central support rod; the characteristics are:

[0008] The folding umbrella also includes a accommodating cavity; the handle is movably connected to the crank; the handle mechanism has a first state and a second state, in the first state, the handle is accommodated in the accommodating cavity; in the second state, the handle is transverse to the crank so that a person can hold and operate the handle mechanism so that the crank rotates relative to the central support rod.

[0009] In some embodiments, the central support rod is provided with the accommodating cavity.

[0010] In some embodiments, the handle mechanism is provided with the accommodating cavity.

[0011] In some embodiments, the accommodating cavity is disposed between the central support rod and the handle mechanism.

[0012] In some embodiments, the accommodating cavity is provided on the crank, the grip is rotatably connected to the crank, and when the handle mechanism is in the first state, the grip is rotated and folded relative to the crank and accommodated in the accommodating cavity.

[0013] In some embodiments, the handle is arranged transversely to the crank, and the handle is movably connected to the crank along its own axis. In the first state, the handle extends axially into the accommodating cavity, and in the second state, the handle withdraws axially from the accommodating cavity; the handle mechanism is configured to switch between the first state and the second state by pressing the handle axially.

[0014] In some embodiments, the folding umbrella further comprises a telescopic assembly, the telescopic assembly comprising a telescopic part, and the telescopic part can be movably arranged relative to the central support rod along a first direction; in the first state, the telescopic part withdraws from the accommodating cavity, and the first direction is parallel to or identical to the axial direction of the handle; in the second state, the telescopic part extends into the accommodating cavity along the first direction and pushes the handle out of the accommodating cavity.

[0015] In some embodiments, the telescopic assembly also includes a fixed seat, which is fixed on a side of the accommodating cavity away from the crank handle along the first direction, and the telescopic member is movably connected to the fixed seat; a locking mechanism is provided between the fixed seat and the telescopic member, and in the first state, the telescopic member is moved closer to the fixed seat, and the locking mechanism is in a locked state; when the locking mechanism is in an unlocked state, the telescopic member can move relative to the fixed seat along the first direction, and the telescopic assembly also includes an elastic member arranged between the fixed seat and the telescopic member, and the elastic member is used to provide the force required for the telescopic member to move away from the fixed seat along the first direction; the locking mechanism is configured to be able to switch between the locked state and the unlocked state by pressing the telescopic member.

[0016] In some embodiments, the telescopic member can move along the first direction and can be connected to the fixed seat so as to rotate around its own axis, and the locking mechanism includes a protrusion and a locking groove, wherein the locking groove is arranged at the end of the telescopic member close to the accommodating cavity, the notch of the locking groove faces the accommodating cavity, and the protrusion is fixed to the fixed seat; or, the locking groove is arranged at the end of the fixed seat away from the accommodating cavity, the notch of the locking groove is away from the accommodating cavity, and the protrusion is fixed to the telescopic member; in the locked state, the protrusion is stuck in the locking groove; in the unlocked state, the protrusion disengages from the locking groove along the circumference of the telescopic member.

[0017] In some embodiments, the fixing seat has a hollow cavity extending along the first direction, and the telescopic part is movably inserted in the hollow cavity; the protrusion protrudes and extends inward from the cavity wall of the hollow cavity, and the outer wall of the telescopic part is ringed with a guide channel, and the guide channel is recessed inward from the outer wall of the telescopic part, and the lock groove is arranged on the side wall of the guide channel away from the accommodating cavity; the outer wall of the telescopic part is also provided with a guide groove extending along the first direction and recessed inward, and the guide groove is connected to the guide channel; along the circumference of the telescopic part, the guide groove and the lock groove are arranged adjacent to each other, and the locking mechanism is in the unlocked state, and the protrusion is located in the guide groove.

[0018] In some embodiments, the cavity wall of the hollow cavity is provided with a plurality of the protrusions at intervals along the circumferential direction, and the telescopic member is provided with a plurality of the locking grooves corresponding to the number of the protrusions, and a plurality of the guide grooves corresponding to the number of the protrusions; along the circumference of the telescopic member, the plurality of the locking grooves and the plurality of the guide grooves are alternately distributed.

[0019] In some embodiments, a driving structure is provided between the fixed seat and the telescopic member, for driving the telescopic member to rotate around its own axis when the telescopic member is pressed, so that the protrusion moves circumferentially along the telescopic member; the driving structure includes a first inclined surface provided on the protrusion, and a first guide surface and a second guide surface provided on the telescopic member, the first guide surface and the second guide surface being arranged on the side wall of the guide channel close to the accommodating cavity; along the circumference of the telescopic member, two adjacent guide grooves are provided on both sides of any locking groove, the two guide grooves being respectively a first guide groove and a second guide groove, the first guide surface extending obliquely from the first guide groove to the locking groove and toward the accommodating cavity at the same time, and the second guide surface extending obliquely from the locking groove to the second guide groove and toward the accommodating cavity at the same time; the first guide surface is used to cooperate with the first inclined surface to slide so that the protrusion approaches the locking groove, and the second guide surface is used to cooperate with the first inclined surface to slide so that the protrusion moves away from the locking groove.

[0020] In some embodiments, a projection of the first guide groove in the first direction falls within a projection of the first guide surface in the first direction.

[0021] In some embodiments, the first guide surface has a first end and a second end located at different ends in the length direction, the first end is close to the first guide groove, the second end is close to the lock groove, and the projection of the second end in the first direction falls into the projection of the lock groove in the first direction.

[0022] In some embodiments, the second guide surface has a third end close to the lock slot and a fourth end away from the lock slot, the lock slot has a first slot wall close to the first guide slot and a second slot wall close to the second guide slot, and the projection of the third end in the first direction falls into the projection of the first slot wall in the first direction.

[0023] In some embodiments, the driving structure further includes a third guide surface and a fourth guide surface provided on the telescopic member, and a second inclined surface provided on the protrusion, along the first direction, the first inclined surface and the second inclined surface are respectively provided on different sides of the protrusion, wherein the first inclined surface is located on a side close to the accommodating cavity, and the second inclined surface is located on a side away from the accommodating cavity, and the groove wall of the locking groove close to the first guide groove constitutes the third guide surface, along the circumferential direction of the telescopic member, the third guide surface extends from the first guide groove to the locking groove, and at the same time, along the axial direction of the telescopic member, the third guide surface extends obliquely away from the accommodating cavity, and the third guide surface is used to contact with the second The inclined surface cooperates and slides to make the protrusion move toward the bottom of the locking groove; the fourth guide surface is arranged on the side wall of the guide channel away from the accommodating cavity, and the fourth guide surface is arranged between the locking groove and the second guide groove, along the circumferential direction of the telescopic member, the fourth guide surface extends from the second guide surface to the second guide groove, and at the same time, along the axial direction of the telescopic member, the fourth guide surface extends obliquely away from the accommodating cavity, and the fourth guide surface is used to cooperate with the second inclined surface to slide so that the protrusion enters the second guide groove, and the projection of the end of the second guide surface away from the lock groove in the first direction falls into the projection of the fourth guide surface in the first direction.

[0024] In some embodiments, the telescopic member includes a main body and a supporting portion, the main body extends along the first direction, the supporting portion is fixed at one end of the main body close to the accommodating cavity, the accommodating cavity has an opening for the handle to be inserted therein, the aperture of the opening is smaller than the diameter of the supporting portion, and in the second state, the supporting portion is located in the accommodating cavity, and the supporting portion abuts against the opening.

[0025] In some embodiments, when the handle mechanism is in the first state, it is located on a side of the crank away from the central support rod, and an outer surface of the crank smoothly transitions to a surface of the grip.

[0026] In some embodiments, the top frame includes a plurality of support units, which are supported by the central support rod and can be relatively expanded and folded, each of the support units respectively including a first top rod and a second top rod, the inner end of each first top rod being rotatably connected to the upper end of the central support rod; the folding umbrella also includes a slider slidably arranged on the central support rod along the up and down directions, the slider deviating from the upper end of the central support rod, the inner end of each second top rod being rotatably connected to the slider, the first top rod is also rotatably connected to the second top rod to form a crank slider mechanism between the first top rod, the second top rod, the central support rod and the slider; a rotating shaft is fixed to one end of the crank handle, the rotating shaft is rotatably connected to the central support rod around its own axis, a traction mechanism is provided between the rotating shaft and the slider, the traction mechanism includes a traction line connected between the slider and the rotating shaft, and the traction mechanism is configured to drive the slider to slide along the central support rod when the rotating shaft rotates, so that the support unit is expanded or folded relative to the central support rod. Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: in the folding umbrella of the present invention, when the handle mechanism is in the first state, the grip can be accommodated in the accommodating cavity, which is not only more beautiful, but also can avoid collision with people or accidental touch by people, thereby improving the safety and stability of the folding umbrella. In the second state, the grip extends from the accommodating cavity, so that the crank can be driven to rotate by the grip. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attachment Figure 1 This is a three-dimensional schematic diagram of the folding umbrella in Example 1 of the present utility model in a folded state;

[0028] Attachment Figure 2 For attachment Figure 1 A magnified schematic diagram of point A in the middle;

[0029] Attachment Figure 3 For attachment Figure 2 Schematic diagram of the middle handle mechanism when it is converted to the second state;

[0030] Attachment Figure 4 This is a three-dimensional schematic diagram of the folding umbrella of Example 1 in the unfolded state;

[0031] Attachment Figure 5 This is an exploded schematic diagram of the structure of the folding umbrella in Example 1;

[0032] Attachment Figure 6 is a three-dimensional schematic diagram of the fixing base of Example 1;

[0033] Attachment Figure 7 is a three-dimensional schematic diagram of the telescopic member of Example 1;

[0034] Attachment Figure 8is a cross-sectional schematic diagram of the handle mechanism of Example 1 in a first state;

[0035] Attachment Figure 9 is a cross-sectional schematic diagram of the handle mechanism of Example 1 in the second state;

[0036] Attachment Figure 10 is a three-dimensional schematic diagram of the handle mechanism of Example 2 in a first state;

[0037] Attachment Figure 11 For attachment Figure 10 Schematic diagram from another perspective;

[0038] Attachment Figure 12 is a three-dimensional schematic diagram of the handle mechanism of Example 2 in the second state;

[0039] Among them: 1. Central support rod; 11. Rod cavity; 2. Top frame; 21. Support unit; 211. First push rod; 212. Second push rod; 3. Handle mechanism; 31. Crank handle; 32. Rotating shaft; 33. Grip; 34. Accommodating cavity; 35. Telescopic assembly; 351. Telescopic member; 351a. Main body; 351b. Abutment portion; 3510. Guide channel; 3511. Locking groove; 3512. Guide groove; 3513. First guide surface; 3514. Second guide surface; 3515. Third guide surface; 3516. Fourth guide surface; 3517. Mounting channel; 352. Fixing seat; 3521. Hollow cavity; 3522. Protrusion; 3523. First inclined surface; 3524. Second inclined surface; 353. Elastic member; 36. Mounting seat; 361. Fixing rod; 37. Ratchet; 4. Slider; 5. Pull line. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments to make the advantages and features of the present invention easier for those skilled in the art to understand. Obviously, the embodiments described in this application are only part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0041] See also Figure 1 、 Figure 4A folding umbrella is shown, comprising a central support rod 1 and a top frame 2 that can be unfolded and folded relative to the central support rod 1. The folding umbrella also includes a handle mechanism 3, which includes a crank 31 and a grip 33, wherein the crank 31 is rotatably connected to the central support rod 1, and the grip 33 is movably connected to the crank 31. The folding umbrella also includes a receiving chamber 34. The handle mechanism 3 has a first state and a second state. In the first state, the grip 33 is accommodated in the receiving chamber 34, making the appearance of the folding umbrella neater and improving the aesthetics of the folding umbrella, while preventing accidental touching of the grip 33. In the second state, the grip 33 is transverse to the crank 31 so that a person can hold and operate the handle mechanism 3 to rotate the crank 31 relative to the central support rod 1.

[0042] In this embodiment, the crank 31 is rotatably mounted on the central support rod 1 about a rotational centerline X1. The direction of extension of the rotational centerline X1 is perpendicular to the axial direction of the central support rod 1. The grip 33 is disposed transversely to the crank 31 and is movably connected to the crank 31 along its own axial direction. In this embodiment, a receiving chamber 34 is disposed between the central support rod 1 and the handle mechanism 3. When the grip 33 and the receiving chamber 34 are aligned, the grip 33 can be accommodated within the receiving chamber 34 by driving the grip 33 to move along its own axial direction toward the receiving chamber 34, thereby converting the handle mechanism 3 to the first state. When the handle mechanism 3 is in the second state, the grip 33 exits the receiving chamber 34 axially, thereby enabling the grip 33 to drive the crank 31 to rotate. In some embodiments, the central support rod 1 is provided with a receiving chamber 34. When the handle mechanism 3 is in the first state, the grip 33 is accommodated within the central support rod 1.

[0043] In other embodiments, the grip 33 can be folded relative to the crank 31. When the grip 33 is folded relative to the crank 31, the handle mechanism 3 is converted to the first state. When the grip 33 is expanded relative to the crank 31, the handle mechanism 3 is converted to the second state. Figures 10 to 12 A handle mechanism 3 is shown, in which the grip 33 is rotatably connected to the crank 31 around the rotation axis X2, and the grip 33 can be rotated and retracted relative to the crank 31. In this embodiment, the handle mechanism 3 is provided with a accommodating chamber 34. Specifically, the crank 31 is provided with an accommodating chamber 34. The accommodating chamber 34 is in the shape of an elongated strip and extends along the length direction of the crank 31. The crank 31 is provided with an opening connected to the accommodating chamber 34 so that the grip 33 can be accommodated in the accommodating chamber 34 from the opening. In this embodiment, openings connected to the accommodating chamber 34 are provided on both sides of the crank 31 in the thickness direction. In this embodiment, the grip 33 has a connecting end and a free end that are respectively provided at two different ends in the length direction. The connecting end extends into the accommodating chamber 34 on the side away from the rotation center line X1, and the connecting end is rotatably connected to the crank 31 around the rotation axis X2. See. Figure 12As shown, when the handle mechanism 3 is in the second state, the free end extends to the side of the crank 31 away from the central support rod 1 so that the user can hold it. Figure 10 、 Figure 11 As shown, the handle mechanism 3 is in the first state, with the grip 33 accommodated in the accommodating cavity 34. In this embodiment, the length of the accommodating cavity 34 is greater than the length of the grip 33, so that in the first state, an operating space is left between the free end of the grip 33 and the wall of the accommodating cavity 34. The user can insert a finger into the operating space to drive the grip 33 to rotate, thereby converting the handle mechanism 3 from the first state to the second state. The user can also use the principle of leverage to drive the grip 33 to rotate by pressing the connecting end, thereby driving the handle mechanism 3 to convert to the second state.

[0044] In this embodiment, the handle mechanism 3 includes a mounting seat 36 that is sleeved and fixed to the outside of the central support rod 1. The accommodating cavity 34 is defined on the mounting seat 36 and extends into the rod cavity 11 of the central support rod 1. In this embodiment, the handle mechanism 3 also includes a telescopic assembly 35. The telescopic assembly 35 includes a telescopic member 351 that is movably disposed on the central support rod 1 along a first direction. In the first state, the telescopic member 351 retracts from the accommodating cavity 34, and the first direction is parallel to or identical to the axial direction of the handle 33. Figure 2 、 Figure 8 As shown, in this state, along the first direction, on the side of the crank 31 away from the central support rod 1, the outer surface of the crank 31 and the surface of the handle 33 are smoothly transitioned, which is more beautiful. At the same time, the handle 33 is not easily touched by people by mistake, thereby improving the stability and safety of the folding umbrella. In the second state, see Figure 3 、 Figure 9 As shown, the telescopic member 351 extends into the accommodating cavity 34 , so that the handle 33 is pushed out of the accommodating cavity 34 , and the user can use the handle 33 to rotate the crank 31 .

[0045] In this embodiment, the handle mechanism 3 can be driven to switch between the first state and the second state by pressing the handle 33 in the axial direction, and the switching operation is simple. Specifically, the telescopic assembly 35 includes a fixed seat 352. In the first direction, the fixed seat 352 is fixed on the side of the accommodating cavity 34 away from the crank 31, and the telescopic member 351 can be movably arranged on the fixed seat 352 along the first direction. A locking mechanism is provided between the fixed seat 352 and the telescopic member 351. When the handle mechanism 3 is in the first state, the telescopic member 351 moves closer to the fixed seat 352, and the locking mechanism is in a locked state. In this state, the telescopic member 351 will not affect the handle 33 located in the accommodating cavity 34. When the locking mechanism is in an unlocked state, the telescopic member 351 can move relative to the fixed seat 352 in the first direction. The telescopic assembly 35 also includes an elastic member 353, which is arranged between the fixed seat 352 and the telescopic member 351. The elastic member 353 is used to provide the force required for the telescopic member 351 to move away from the fixed seat 352. In this way, when the locking mechanism is in the unlocked state, driven by the elastic member 353, the telescopic member 351 can automatically move away from the fixed seat 352 and can automatically extend into the accommodating cavity 34, so that the handle 33 located in the accommodating cavity 34 can be automatically pushed out of the accommodating cavity 34, thereby realizing the conversion of the handle mechanism 3 to the second state.

[0046] In this embodiment, the locking mechanism can be driven to switch between a locked state and an unlocked state by pressing the telescopic member 351. When the handle 33 and the accommodating chamber 34 extend in the same direction, the telescopic member 351 can be pushed to move by pressing the handle 33 in a first direction, thereby pressing the telescopic member 351. In this way, the locking mechanism can be locked and unlocked by pressing the handle 33. Specifically, when the telescopic member 351 is inserted into the accommodating chamber 34, the locking mechanism is in an unlocked state. When the handle 33 is pressed in the first direction, the handle 33 pushes the telescopic member 351 toward the fixed seat 352. During this process, the telescopic member 351 can be locked together with the fixed seat 352. During the process of pressing the handle 33, the telescopic member 351 gradually withdraws from the accommodating chamber 34. When the telescopic member 351 and the fixed seat 352 are locked with each other, the handle 33 is accommodated in the accommodating chamber 34, and the handle mechanism 3 is switched to the first state. In the first state, the handle 33 is pressed along the first direction, and the handle 33 pushes the telescopic member 351 to move and unlock the locking mechanism. Driven by the elastic member 353, the telescopic member 351 can move toward the accommodating cavity 34 and push the handle 33 out, thereby converting the handle mechanism 3 into the second state.

[0047] In this embodiment, a fixing groove is provided on a side of the mounting seat 36 away from the accommodating cavity 34 in the first direction. The fixing seat 352 extends in the first direction, with one end of the fixing seat 352 inserted into the fixing groove and the other end of the fixing seat 352 extending into the rod cavity 11 of the central support rod 1. In this embodiment, two fixing rods 361 are provided on the mounting seat 36. When the mounting seat 36 is fixed to the central support rod 1, the two fixing rods 361 extend along the same length direction. The length extension direction of the fixing rods 361 is perpendicular to the first direction. Along the length extension direction of the fixing rods 361, the fixing seat 352 is located between the two fixing rods 361. The two fixing rods 361 abut against both sides of the fixing seat 352 to fix the fixing seat 352.

[0048] In this embodiment, an opening is provided on the side of the mounting base 36 near the crank 31, communicating with the accommodating chamber 34, for inserting the handle 33 into the accommodating chamber 34. In this embodiment, the telescopic member 351 comprises a main body 351a and an abutting portion 351b. The main body 351a extends along a first direction, and the abutting portion 351b is fixed to one end of the telescopic member 351 near the accommodating chamber 34. In the first state, the abutting portion 351b abuts against the handle 33. During the state transition of the handle mechanism 3, the handle 33 pushes the abutting portion 351b to move, or the abutting portion 351b pushes the handle 33 to move. In this embodiment, the diameter of the opening is smaller than the diameter of the abutting portion 351b. When the handle mechanism 3 is in the second state, the abutting portion 351b is located within the accommodating chamber 34, and under the action of the elastic member 353, the abutting portion 351b abuts against the opening. In this embodiment, the opening limits the telescopic member 351 . Meanwhile, in the second state, the abutting portion 351 b blocks the opening, thereby preventing the interior of the accommodating cavity 34 from being contaminated.

[0049] In this embodiment, the telescopic member 351 is mounted on a fixed seat 352 so as to be movable in a first direction and rotatable along its own axis. The locking mechanism includes a protrusion 3522 fixed to the fixed seat 352 and a locking slot 3511 disposed on the telescopic member 351. The locking slot 3511 is disposed at an end of the telescopic member 351 proximal to the accommodating chamber 34, with the notch of the locking slot 3511 facing the accommodating chamber 34. When the locking mechanism is in the locked state, the protrusion 3522 is retained within the locking slot 3511. During the unlocking process, the telescopic member 351 rotates about its axis, causing the protrusion 3522 to move circumferentially along the telescopic member 351. When the locking mechanism is in the unlocked state, the protrusion 3522 disengages from the locking slot 3511. In some embodiments, the protrusion 3522 is fixed to the telescopic member 351, and the locking slot 3511 is disposed at an end of the fixed seat 352 distal to the accommodating chamber 34, with the notch of the locking slot 3511 distal to the accommodating chamber 34.

[0050] Specifically, see Figure 6 、 Figure 7As shown, the fixing seat 352 has a hollow cavity 3521 extending along the first direction, and the telescopic member 351 extends along the first direction. The telescopic member 351 is movably inserted into the hollow cavity 3521. The protrusion 3522 protrudes inward from the cavity wall of the hollow cavity 3521, and the locking groove 3511 is provided on the outer wall of the telescopic member 351. Figure 6 As shown, in this embodiment, the protrusion 3522 is arranged at one end of the fixing seat 352 close to the accommodating cavity 34. Under the action of the elastic member 353, the telescopic member 351 keeps being driven to move toward the accommodating cavity 34, so that the protrusion 3522 always rests on the groove wall of the locking groove 3511, and the locking mechanism can be stably maintained in a locked state.

[0051] In this embodiment, a guide groove 3512 extending in a first direction is further defined on the outer sidewall of the telescopic member 351. The guide groove 3512 is positioned adjacent to the locking groove 3511 along the circumference of the telescopic member 351. The guide groove 3512 provides guidance for the movement of the protrusion 3522. When the handle mechanism 3 transitions from the first state to the second state, the locking mechanism enters the unlocked state, and the protrusion 3522 enters the guide groove 3512 from the locking groove 3511, allowing the protrusion 3522 to move along the guide groove 3512. In the second state, the protrusion 3522 is located within the guide groove 3512.

[0052] In this embodiment, a plurality of protrusions 3522 are spaced apart along the circumference of the hollow cavity 3521 on the cavity wall. The telescopic member 351 is provided with a plurality of locking grooves 3511 corresponding to the number of protrusions 3522, and a plurality of guide grooves 3512 corresponding to the number of protrusions 3522. The plurality of locking grooves 3511 and guide grooves 3512 are alternately distributed along the circumference of the telescopic member 351. When the locking mechanism switches between a locked state and an unlocked state, the protrusions 3522 move relative to the telescopic member 351 along the circumference of the telescopic member 351, thereby moving from the locking grooves 3511 into the guide grooves 3512, or from the guide grooves 3512 into the locking grooves 3511. As the locking mechanism switches states, the protrusions 3522 rotate around the telescopic member 351 in a clockwise or counterclockwise direction, and during this process, the protrusions 3522 enter the alternating locking grooves 3511 and guide grooves 3512 one by one.

[0053] In this embodiment, see Figure 7As shown, the outer wall of the telescopic member 351 is provided with a guide channel 3510, which is recessed inward from the outer wall of the telescopic member 351. A guide groove 3512 is also recessed inward from the outer wall of the telescopic member 351. The guide groove 3512 and the guide channel 3510 are interconnected. The locking groove 3511 is provided on the side wall of the guide channel 3510 away from the accommodating chamber 34. During the state transition of the locking mechanism, the protrusion 3522 always moves in the interconnected guide channel 3510 and guide groove 3512, making the locking mechanism more stable.

[0054] In the present embodiment, a driving structure is provided between the fixed seat 352 and the telescopic member 351, for driving the telescopic member 351 to rotate around its own axis when pressing the telescopic member 351, so that the protrusion 3522 moves along the circumferential direction of the telescopic member 351, thereby realizing the conversion of the locking mechanism state. In the present embodiment, the driving structure includes a first inclined surface 3523 arranged on the protrusion 3522, and a first guide surface 3513 and a second guide surface 3514 arranged on the telescopic member 351. Along the circumference of the telescopic member 351, both sides of any lock groove 3511 are provided with a first guide groove 3512a and a second guide groove 3512b adjacent thereto, and along the circumference of the telescopic member 351, the first guide surface 3513 extends from the first guide groove 3512a to the lock groove 3511, and the second guide surface 3514 extends from the lock groove 3511 to the second guide groove 3512b. The first guide surface 3513 is used to slide in cooperation with the first inclined surface 3523 so that the protrusion 3522 approaches the locking groove 3511 , and the second guide surface 3514 is used to slide in cooperation with the first inclined surface 3523 so that the protrusion 3522 moves away from the locking groove 3511 .

[0055] Specifically, see Figure 7 As shown, the first guide surface 3513 and the second guide surface 3514 are arranged on the side wall of the guide channel 3510 close to the accommodating chamber 34. Along the circumference of the telescopic member 351, the first guide surface 3513 extends from the first guide groove 3512a to the locking groove 3511. At the same time, along the axial direction of the telescopic member 351, the first guide surface 3513 extends obliquely toward the accommodating chamber 34. Along the circumference of the telescopic member 351, the second guide surface 3514 extends from the locking groove 3511 to the second guide groove 3512b. At the same time, along the axial direction of the telescopic member 351, the second guide surface 3514 extends obliquely toward the accommodating chamber 34.

[0056] When the handle mechanism 3 is driven to transition to the first state, the retractable member 351 is pressed by the grip 33, causing the retractable member 351 to approach the fixed seat 352, and the protrusion 3522 to approach the abutment portion along the first guide groove 3512a. During this process, the first inclined surface 3523 contacts the first guide surface 3513, and the two slide in cooperation, causing the protrusion 3522 to continue to approach the abutment portion. Simultaneously, the protrusion 3522 approaches the locking groove 3511 along the circumference of the retractable member 351. When the grip 33 is released, the retractable member 351 is also released. Driven by the elastic member 353, the retractable member 351 moves away from the fixed seat 352. During this process, the protrusion 3522 separates from the first guide surface 3513 and moves toward the side wall of the guide channel 3510 away from the accommodating cavity 34, thereby entering the locking groove 3511. When the handle mechanism 3 is driven to transition to the second state, when the telescopic part 351 is pressed by the handle 33, the protrusion 3522 approaches the abutting portion and disengages from the locking groove 3511. After the first inclined surface 3523 contacts the second guide surface 3514, the two slide together, so that the protrusion 3522 moves away from the locking groove 3511 in the circumferential direction. When the handle 33 is released, the protrusion 3522 moves toward the side wall of the guide channel 3510 away from the accommodating cavity 34.

[0057] In this embodiment, the projection of the first guide groove 3512a along the first direction falls within the projection of the first guide surface 3513 along the first direction. This ensures that when the protrusion 3522 moves along the first guide groove 3512a toward the abutment portion, the protrusion 3522 can contact the first guide surface 3513. In this embodiment, the first guide surface 3513 has a first end and a second end disposed at opposite ends in the longitudinal direction. The first end is adjacent to the first guide groove 3512a, and the second end is adjacent to the locking groove 3511. The projection of the second end along the first direction falls within the projection of the locking groove 3511 along the first direction. This ensures that when the handle 33, that is, the telescopic member 351, is released, the elastic member 353 acts to allow the protrusion 3522 to enter the locking groove 3511.

[0058] In this embodiment, the second guide surface 3514 has a third end proximal to the locking slot 3511 and a fourth end distal to the locking slot 3511. The locking slot 3511 has a first slot wall proximal to the first guide slot 3512a and a second slot wall proximal to the second guide slot 3512b. The projection of the third end in the first direction falls within the projection of the first slot wall in the first direction. This ensures that the protrusion 3522 can contact the second guide surface 3514 after disengaging from the locking slot 3511 during the transition to the second state.

[0059] In this embodiment, the drive structure further includes a third guide surface 3515 and a fourth guide surface 3516 provided on the telescopic member 351, and a second inclined surface 3524 provided on the protrusion 3522. Along the first direction, the first inclined surface 3523 and the second inclined surface 3524 are located on opposite sides of the protrusion 3522, with the first inclined surface 3523 located on the side closer to the accommodating cavity 34 and the second inclined surface 3524 located on the side farther from the accommodating cavity 34. Along the circumference of the telescopic member 351, the third guide surface 3515 extends from the first guide groove 3512a toward the locking groove 3511. Simultaneously, along the axial direction of the telescopic member 351, the third guide surface 3515 extends at an angle away from the accommodating cavity 34. The third guide surface 3515 is configured to slide in conjunction with the second inclined surface 3524 to cause the protrusion 3522 to move toward the bottom of the locking groove 3511. In this embodiment, the first groove wall constitutes the third guide surface 3515. The fourth guide surface 3516 is arranged on the side wall of the guide channel 3510 away from the accommodating chamber 34, and the fourth guide surface 3516 is arranged between the locking groove 3511 and the second guide groove 3512b. Along the circumference of the telescopic member 351, the fourth guide surface 3516 extends from the second guide surface 3514 to the second guide groove 3512b. At the same time, along the axial direction of the telescopic member 351, the fourth guide surface 3516 extends obliquely in the direction away from the accommodating chamber 34. The fourth guide surface 3516 is used to cooperate with the second inclined surface 3524 to slide so that the protrusion 3522 enters the second guide groove 3512b.

[0060] In this embodiment, the projection of the fourth end in the first direction falls into the projection of the fourth guide surface 3516 in the first direction, so that when switching to the second state, when the handle 33 and the telescopic member 351 are released, the protrusion 3522 can smoothly contact the fourth guide surface 3516 under the drive of the elastic member 353.

[0061] In this embodiment, the locking groove 3511 is V-shaped, so that during the state conversion process, the protrusion 3522 can more smoothly enter the locking groove 3511 or disengage from the locking groove 3511 under the action of the driving structure. At the same time, when the locking mechanism is in the locked state, the protrusion 3522 can be more stably inserted into the V-shaped locking groove 3511.

[0062] In this embodiment, the linkage mechanism includes a first retaining groove and a second retaining groove. The notches of the first retaining groove and the second retaining groove are both located away from the accommodating cavity 34. Both the first retaining groove and the second retaining groove are located on the sidewall of the guide channel 3510 near the accommodating cavity 34. The first retaining groove is located between the first guide groove 3512a and the locking groove 3511, and the second retaining groove is located between the locking groove 3511 and the second guide groove 3512b. In this embodiment, both the first retaining groove and the second retaining groove are V-shaped. The groove wall of the first retaining groove near the first guide groove 3512a forms a first guide surface 3513, and the groove wall of the second retaining groove near the locking groove 3511 forms a second guide surface 3514.

[0063] The specific process of the handle mechanism 3 converting to the first state is: pressing the handle 33 along the first direction, the handle 33 pushes the telescopic part 351 located in the accommodating cavity 34 to move, so that the telescopic part 351 is disengaged from the accommodating cavity 34. During this process, the protrusion 3522 moves along the first guide groove 3512a toward the guide channel 3510. When the protrusion 3522 contacts the first guide surface 3513, the first inclined surface 3523 cooperates with the first guide surface 3513 to slide, so that the protrusion 3522 moves toward the locking groove 3511 along the circumference of the telescopic member 351 until the protrusion 3522 moves to the bottom of the first stop groove. At this time, the handle 33 can no longer move forward and is released. The telescopic member 351 moves toward the accommodating chamber 34 under the drive of the elastic member 353. During this process, the protrusion 3522 moves toward the side wall of the guide channel 3510 away from the accommodating chamber 34. The protrusion 3522 contacts the second guide surface 3514, and the second inclined surface 3524 cooperates with the second guide surface 3514 to slide, so that the protrusion 3522 moves to the bottom of the locking groove 3511. At this time, the telescopic member 351 stops moving, and the handle 33 is also successfully accommodated in the accommodating chamber 34.

[0064] The specific process of the handle mechanism 3 switching from the first state to the second state is as follows: the handle 33 is pressed, and the handle 33 pushes the telescopic member 351 away from the accommodating chamber 34. During this process, the protrusion 3522 disengages from the locking groove 3511 and moves toward the side wall of the guide channel 3510 close to the abutment portion. When the protrusion 3522 contacts the second guide surface 3514, the first inclined surface 3523 slides in cooperation with the second guide surface 3514, and the protrusion 3522 moves along the circumference of the telescopic member 351 toward the second guide groove 3512b until the protrusion 3522 moves to the second stop. The bottom of the groove is reached, releasing the handle 33. Driven by the elastic member 353, the telescopic member 351 moves toward the accommodating chamber 34. During this process, the protrusion 3522 contacts the fourth guide surface 3516. The second inclined surface 3524 slides in conjunction with the fourth guide surface 3516, causing the protrusion 3522 to continue moving toward the second guide groove 3512b until the protrusion 3522 enters the second guide groove 3512b. The protrusion 3522 moves away from the accommodating chamber 34 along the second guide groove 3512b, and the telescopic member 351 extends into the accommodating chamber 34 and pushes out the handle 33. When the abutting portion abuts the opening of the accommodating chamber 34, the telescopic member 351 stops moving, and the handle 33 is completely released from the accommodating chamber 34.

[0065] In this embodiment, at the end away from the accommodating cavity 34, the telescopic member 351 is further provided with a mounting channel 3517. The number of mounting channels 3517 corresponds to the number of protrusions 3522, and the mounting channels 3517 are used to connect the fixed seat 352 with the telescopic member 351. One end of the mounting channel 3517 is connected to the guide groove 3512, and the other end is connected to the outside of the telescopic member 351. When the fixed seat 352 and the telescopic member 351 are connected, the protrusion 3522 enters the guide groove 3512 from the mounting channel 3517. In this embodiment, see Figure 7 As shown, the mounting channel 3517 is L-shaped and has a first section and a second section that are interconnected. The first section extends along a first direction from the end of the telescopic member 351 away from the accommodating chamber 34, and the second section extends from the first section along the circumference of the telescopic member 351 to the guide groove 3512. In the first direction, the end of the guide groove 3512 away from the accommodating chamber 34 extends beyond the second section to prevent the protrusion 3522 from entering the second section when the handle mechanism 3 is in the second state, thereby affecting the normal operation of the telescopic assembly.

[0066] In this embodiment, the top frame 2 includes a plurality of support units 21, which are supported by the central support rod 1 and can be relatively expanded and folded. Each support unit 21 includes a first top rod 211 and a second top rod 212, respectively. The inner end of each first top rod 211 is rotatably connected to the upper end of the central support rod 1. The folding umbrella also includes a slider 4 that is slidably arranged on the central support rod 1 in the up and down directions. The slider 4 deviates from the upper end of the central support rod 1. The inner end of each second top rod 212 is rotatably connected to the slider 4. The first top rod 211 is also rotatably connected to the second top rod 212 to form a crank slider mechanism between the first top rod 211, the second top rod 212, the central support rod 1 and the slider 4. By driving the slider 4 to move along the central support rod 1, each support unit 21 can be driven to expand or fold relative to the central support rod 1, so that the folding umbrella can be converted between the expanded state and the folded state. Specifically, see Figure 1 As shown, driving the slider 4 away from the upper end of the central support rod 1 can drive the inner end of the second top rod 212 to move downward, causing the second top rod 212 to fold relative to the central support rod 1, and the second top rod 212 can drive the first top rod 211 to fold relative to the central support rod 1, and the folding umbrella is converted to the folded state. Driving the slider 4 toward the upper end of the central support rod 1 can drive the inner end of the second top rod 212 to move upward, causing the second top rod 212 to unfold relative to the central support rod 1 and drive the first top rod 211 to unfold relative to the central support rod 1, and the folding umbrella is converted to the unfolded state.

[0067] In this embodiment, a rotating shaft 32 is fixed to one end of the crank 31. The axis of the rotating shaft 32 extends colinearly with the rotation centerline X1. The rotating shaft 32 is connected to the central support rod 1 so as to rotate around its own axis. When the crank 31 is rotated by the grip 33, the rotating shaft 32 rotates around its own axis. Figure 5 、 Figure 9 As shown, in this embodiment, the handle 33 and the rotating shaft 32 are arranged at different ends in the length direction of the crank 31. Such an arrangement can increase the distance between the handle 33 and the rotating shaft 32, thereby increasing the length of the force arm for rotating the crank 31, so that when the crank 31 is rotated through the handle 33, the resistance encountered is smaller and the rotation is easier.

[0068] In this embodiment, turning the crank 31 can cause the top frame 2 to expand or collapse, thereby switching the folding umbrella between the expanded and collapsed states. Specifically, a traction mechanism is provided between the rotating shaft 32 and the slider 4. During rotation of the rotating shaft 32, the traction mechanism can drive the slider 4 to slide along the central support rod 1, thereby achieving the expansion or collapse of the top frame 2. Specifically, the traction mechanism includes a traction wire 5 connected between the slider 4 and the rotating shaft 32. One end of the traction wire 5 is fixed to the rotating shaft 32. By rotating the rotating shaft 32 by the crank 31, the traction wire 5 can be wound around the rotating shaft 32, thereby driving the movement of the slider 4.

[0069] In this embodiment, see Figure 5 、 Figure 8 As shown, a ratchet 37 is fixed to the rotating shaft 32, and a pawl and a second elastic member that drives the pawl toward the ratchet 37 are rotatably provided on the central support rod 1. Specifically, the pawl and the second elastic member are provided on the mounting seat 36. The cooperation between the pawl and the ratchet 37 prevents the rotating shaft 32 and the crank handle 31 from rotating backward, thereby preventing the top frame 2 from automatically folding under its own weight or other external forces. When the crank handle 31 is manually rotated, the ratchet 37 displaces the pawl and rotates.

[0070] In summary, the folding umbrella of this embodiment can control the expansion and folding of the top frame 2 by rotating the crank 31 via the grip 33. When the crank 31 does not need to be rotated, the grip 33 can be pressed axially to convert the handle mechanism 3 to the first state. In this state, the grip 33 is accommodated in the accommodating cavity 34, which not only improves the appearance but also prevents collisions with people or accidental touches, thereby improving the safety and stability of the folding umbrella. The user only needs to press the grip 33 axially again to drive the handle mechanism 3 from the first state to the second state. In this state, the grip 33 extends from the accommodating cavity 34, and the user can drive the crank 31 to rotate via the grip 33.

[0071] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A folding umbrella, comprising: Center support rod, a top frame capable of being expanded and collapsed relative to the central support rod; The folding umbrella further includes a handle mechanism, which includes a crank and a grip, and the crank is rotatably connected to the central support rod; the characteristics are: The folding umbrella also includes a accommodating cavity; the handle is movably connected to the crank; the handle mechanism has a first state and a second state, in the first state, the handle is accommodated in the accommodating cavity; in the second state, the handle is transverse to the crank so that a person can hold and operate the handle mechanism so that the crank rotates relative to the central support rod.

2. The folding umbrella according to claim 1, characterized in that: The central support rod is provided with the accommodating cavity; or the handle mechanism is provided with the accommodating cavity; or the accommodating cavity is provided between the central support rod and the handle mechanism.

3. The folding umbrella according to claim 2, characterized in that: The accommodating cavity is provided on the crank, and the grip is rotatably connected to the crank. When the handle mechanism is in the first state, the grip is folded and rotated relative to the crank and accommodated in the accommodating cavity.

4. The folding umbrella according to claim 1, characterized in that: The handle is arranged transversely to the crank, and the handle is movably connected to the crank along its own axis. In the first state, the handle extends axially into the accommodating cavity, and in the second state, the handle withdraws axially from the accommodating cavity; the handle mechanism is configured to switch between the first state and the second state by pressing the handle axially.

5. The folding umbrella according to claim 4, characterized in that: The folding umbrella also includes a telescopic assembly, which includes a telescopic part, and the telescopic part can be movably arranged relative to the central support rod along a first direction; in the first state, the telescopic part withdraws from the accommodating cavity, and the first direction is parallel to or the same as the axial direction of the handle; in the second state, the telescopic part extends into the accommodating cavity along the first direction and pushes the handle out of the accommodating cavity.

6. The folding umbrella according to claim 5, characterized in that: The telescopic assembly further includes a fixing seat, which is fixed on a side of the accommodating cavity away from the crank handle along the first direction, and the telescopic member is movably connected to the fixing seat; A locking mechanism is provided between the fixing seat and the telescopic member. In the first state, the telescopic member moves closer to the fixing seat, and the locking mechanism is in a locked state. When the locking mechanism is in an unlocked state, the telescopic member can move relative to the fixing seat along the first direction. The telescopic assembly further includes an elastic member disposed between the fixing seat and the telescopic member, the elastic member being configured to provide the force required for the telescopic member to move away from the fixing seat along the first direction; The locking mechanism is configured to be switchable between the locked state and the unlocked state by pressing the telescopic member.

7. The folding umbrella according to claim 6, characterized in that: The telescopic member is connected to the fixing seat so as to be movable along the first direction and rotatable around its own axis; The locking mechanism includes a protrusion and a locking groove, wherein the locking groove is provided at an end of the telescopic member close to the accommodating cavity, the notch of the locking groove faces the accommodating cavity, and the protrusion is fixed to the fixing seat; or the locking groove is provided at an end of the fixing seat away from the accommodating cavity, the notch of the locking groove is away from the accommodating cavity, and the protrusion is fixed to the telescopic member; In the locked state, the protrusion is locked in the lock groove; in the unlocked state, the protrusion is separated from the lock groove along the circumferential direction of the telescopic member.

8. The folding umbrella according to claim 7, characterized in that: The fixing seat has a hollow cavity extending along the first direction, and the telescopic member is movably inserted into the hollow cavity; the protrusion protrudes inward from the cavity wall of the hollow cavity, and the outer wall of the telescopic member is provided with a guide channel, and the guide channel is recessed inward from the outer wall of the telescopic member, and the locking groove is provided on the side wall of the guide channel away from the accommodating cavity; The outer side wall of the telescopic member is also provided with a guide groove extending along the first direction and concave inward, and the guide groove is communicated with the guide channel; along the circumference of the telescopic member, the guide groove is adjacent to the lock groove, and the locking mechanism is in the unlocked state, and the protrusion is located in the guide groove.

9. The folding umbrella according to claim 8, characterized in that: The cavity wall of the hollow cavity is provided with a plurality of the protrusions at intervals along the circumferential direction, and the telescopic member is provided with a plurality of the locking grooves corresponding to the number of the protrusions, and a plurality of the guide grooves corresponding to the number of the protrusions; along the circumference of the telescopic member, the plurality of the locking grooves and the plurality of the guide grooves are alternately distributed.

10. The folding umbrella according to claim 8, characterized in that: A driving structure is provided between the fixing seat and the telescopic member, for driving the telescopic member to rotate around its own axis when the telescopic member is pressed, so that the protrusion moves along the circumferential direction of the telescopic member; The driving structure includes a first inclined surface provided on the protrusion, and a first guide surface and a second guide surface provided on the telescopic member, the first guide surface and the second guide surface being arranged on the side wall of the guide channel close to the accommodating cavity; along the circumference of the telescopic member, two adjacent guide grooves are provided on both sides of any locking groove, and the two guide grooves are respectively a first guide groove and a second guide groove, the first guide surface extends obliquely from the first guide groove to the locking groove and simultaneously to the accommodating cavity, and the second guide surface extends obliquely from the locking groove to the second guide groove and simultaneously to the accommodating cavity; the first guide surface is used to cooperate with the first inclined surface to slide so that the protrusion approaches the locking groove, and the second guide surface is used to cooperate with the first inclined surface to slide so that the protrusion moves away from the locking groove.

11. The folding umbrella according to claim 10, characterized in that: The projection of the first guide groove in the first direction falls within the projection of the first guide surface in the first direction; And / or, the first guide surface has a first end and a second end respectively provided at two different ends in the length direction, the first end being close to the first guide groove, the second end being close to the locking groove, and a projection of the second end in the first direction falling within a projection of the locking groove in the first direction; And / or, the second guide surface has a third end close to the lock slot and a fourth end away from the lock slot, the lock slot has a first slot wall close to the first guide slot and a second slot wall close to the second guide slot, and the projection of the third end in the first direction falls into the projection of the first slot wall in the first direction.

12. The folding umbrella according to claim 10, characterized in that: The driving structure further includes a third guide surface and a fourth guide surface provided on the telescopic member, and a second inclined surface provided on the protrusion. Along the first direction, the first inclined surface and the second inclined surface are respectively arranged on two different sides of the protrusion, wherein the first inclined surface is located on a side close to the accommodating cavity, and the second inclined surface is located on a side away from the accommodating cavity. The wall of the locking groove adjacent to the first guide groove constitutes the third guide surface. Along the circumference of the telescopic member, the third guide surface extends from the first guide groove toward the locking groove. At the same time, along the axial direction of the telescopic member, the third guide surface extends obliquely away from the accommodating cavity. The third guide surface is configured to slide in cooperation with the second inclined surface so that the protrusion moves toward the bottom of the locking groove. The fourth guide surface is arranged on the side wall of the guide channel away from the accommodating cavity, and the fourth guide surface is arranged between the locking groove and the second guide groove. Along the circumferential direction of the telescopic member, the fourth guide surface extends from the second guide surface to the second guide groove. At the same time, along the axial direction of the telescopic member, the fourth guide surface extends obliquely away from the accommodating cavity. The fourth guide surface is used to slide in cooperation with the second inclined surface so that the protrusion enters the second guide groove, and the projection of the end of the second guide surface away from the locking groove in the first direction falls into the projection of the fourth guide surface in the first direction.

13. The folding umbrella according to claim 5, characterized in that: The telescopic member includes a main body and a supporting portion. The main body extends along the first direction. The supporting portion is fixed at one end of the main body close to the accommodating cavity. The accommodating cavity has an opening for inserting the handle therein. The aperture of the opening is smaller than the diameter of the supporting portion. In the second state, the supporting portion is located in the accommodating cavity and the supporting portion abuts against the opening.

14. The folding umbrella according to claim 1, characterized in that: When the handle mechanism is in the first state, it is located on the side of the crank away from the central support rod, and the outer surface of the crank smoothly transitions to the surface of the grip; And / or, the top frame includes a plurality of support units, which are supported by the central support rod and can be relatively expanded and folded, each of the support units includes a first top rod and a second top rod, and the inner end of each first top rod is rotatably connected to the upper end of the central support rod; The folding umbrella further includes a slider slidably disposed on the central support rod in an up-down direction, the slider being offset from an upper end portion of the central support rod, the inner end portion of each second push rod being rotatably connected to the slider, and the first push rod being relatively rotatably connected to the second push rod to form a slider-crank mechanism between the first push rod, the second push rod, the central support rod, and the slider; A rotating shaft is fixed to one end of the crank handle, and the rotating shaft is rotatably connected to the central support rod around its own axis. A traction mechanism is provided between the rotating shaft and the slider, and the traction mechanism includes a traction line connected between the slider and the rotating shaft. The traction mechanism is configured to drive the slider to slide along the central support rod when the rotating shaft rotates, so that the support unit is expanded or folded relative to the central support rod.

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