A type of straight-handled umbrella

Abstract

This application discloses a straight-handled umbrella, comprising: a first grip; a second grip having an axially extending receiving cavity inside, the first grip and the second grip being coaxially connected, and the first grip being rotatable relative to the second grip; a motor fixed in the receiving cavity, the motor having an axially penetrating shaft hole; a drive shaft passing through the shaft hole and axially penetrating the second grip, the motor being circumferentially connected to the drive shaft to drive the drive shaft to rotate; and an umbrella rib assembly including a lower fin and an umbrella rib body movably connected to each other, one end of the drive shaft extending out of the receiving cavity being circumferentially connected to the lower fin to convert the rotational motion of the drive shaft into linear motion of the lower fin along the axial direction of the drive shaft, thereby realizing the opening and closing of the umbrella rib body; wherein, the other end of the drive shaft extending out of the receiving cavity is circumferentially fixed to the first grip, so that the drive shaft can be driven to rotate by the motor or driven to rotate by the user manually rotating the first grip.

Description

Technical Field

[0001] This application relates to the field of umbrella structure technology, and more specifically to a straight-handle umbrella. Background Technology

[0002] Umbrellas are an indispensable tool for people's daily travel, effectively helping them to shield themselves from wind and rain. Straight-handled umbrellas typically open and close by pushing the lower handle along the shaft's axis, a simple structure but lacking in convenience. With technological advancements, electric straight-handled umbrellas have gradually entered the market. These umbrellas incorporate a motor and transmission mechanism inside the handle, using electricity to drive the operation instead of manual pushing and pulling, thus improving ease of use.

[0003] However, existing electric straight-handle umbrellas generally have the following drawbacks: once the battery is depleted or the circuit fails, the entire umbrella will completely fail, resulting in insufficient reliability. Even if some umbrella products attempt to introduce a dual-drive design of manual and electric, a switching mechanism such as a clutch and ratchet needs to be added, which leads to a complex transmission structure, an increased handle size, and a more complicated mode switching operation. In addition, the series layout of the motor, switching mechanism and transmission components occupies a lot of axial space, which limits the miniaturization of the handle. Summary of the Invention

[0004] The purpose of this application is to provide a straight-handle umbrella that reduces the complexity of electric or manual operation of the umbrella opening and closing, while ensuring a compact umbrella structure.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a straight-handled umbrella is provided, comprising: a first grip; a second grip having an axially extending receiving cavity inside, the first grip being coaxially connected to the second grip, and the first grip being rotatable relative to the second grip; a motor fixed in the receiving cavity, the motor having an axially penetrating shaft hole; a drive shaft passing through the shaft hole and axially penetrating the second grip, the motor being circumferentially connected to the drive shaft to drive the drive shaft to rotate; an umbrella rib assembly including a lower fin and an umbrella rib body movably connected to each other, one end of the drive shaft extending out of the receiving cavity being drively connected to the lower fin to convert the rotational motion of the drive shaft into linear motion of the lower fin along the axial direction of the drive shaft, thereby realizing the opening and closing of the umbrella rib body; wherein, the other end of the drive shaft extending out of the receiving cavity is circumferentially fixed to the first grip, and thus the drive shaft can be driven to rotate by the motor or by the user manually rotating the first grip.

[0006] Preferably, the motor is a frameless torque motor.

[0007] Preferably, it further includes a power supply component and a drive circuit board, both of which are fixedly connected to the second gripper. The drive circuit board is electrically connected to the power supply component and electrically connected to the frameless torque motor via a three-phase line. The transmission shaft has multiple magnets fixed on its outer circumferential surface that passes through the shaft hole. The multiple magnets are arranged alternately along the circumference of the transmission shaft to form alternating N and S poles.

[0008] As a preferred embodiment, the device further includes: a bearing component located within the receiving cavity and sleeved with the drive shaft; a gasket sleeved on the drive shaft and located between the bearing component and the motor, the gasket being a wave-shaped gasket; and an axial locking member disposed on the drive shaft, the axial locking member pressing the bearing component, the gasket, and the motor axially.

[0009] As a preferred embodiment, the umbrella handle housing is also included, which is connected to the second gripping member. The end of the drive shaft away from the first gripping member extends out of the receiving cavity and is housed within the umbrella handle housing. A travel groove extending axially is provided on the outer peripheral wall of the umbrella handle housing. The lower nest includes a sleeve that is slidably fitted onto the outside of the umbrella handle housing. An insert is provided on the inner wall of the sleeve and is embedded in the travel groove.

[0010] As another preferred embodiment, the drive shaft is provided with a spiral groove on the side near the umbrella rib assembly; the lower cavity also includes a plunger and a ball, the plunger is fixedly connected to the sleeve, and the ball is rotatably clamped between the plunger and the spiral groove; wherein, when the drive shaft rotates, the ball rolls along the spiral groove to drive the sleeve to reciprocate axially along the stroke groove.

[0011] As another preferred option, the pitch of the spiral groove is 15 mm to 20 mm.

[0012] Furthermore, it also includes a locking member, which is movably disposed on the outer periphery of the second gripper. Correspondingly, the outer periphery of the first gripper is provided with a locking groove. At least a portion of the locking member is embedded in the locking groove to restrict the circumferential rotation of the first gripper relative to the second gripper.

[0013] Furthermore, the umbrella rib body includes a first support link and a second support link. One end of the first support link is rotatably connected to the lower nest, and the other end is connected to the second support link via a sliding hinge. The sliding hinge is provided with an arc-shaped guide groove. The second support link is fixedly connected to the sliding hinge, and the first support link is connected to the arc-shaped guide groove. When the lower nest moves axially along the drive shaft, the end of the first support link slides along the arc-shaped guide groove to drive the second support link to unfold or retract relative to the first support link.

[0014] Further preferably, it also includes an umbrella top assembly, which is connected to the umbrella handle housing. A retaining sleeve is fitted onto the end of the drive shaft near the umbrella top assembly. The outer circumferential surface of the retaining sleeve mates with the inner wall of the umbrella handle housing so that the drive shaft and the umbrella handle housing remain coaxial.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: In this application, the motor and the first grip share the same drive shaft, and there is no need for any switching mechanism between manual and electric modes. The drive shaft itself is both the output shaft of the motor and the input shaft for manual mode. The coexistence of electric and manual modes in the structure achieves the technical effect of shorter transmission path and more direct response. Even if the power is exhausted, the circuit fails, or the battery performance deteriorates due to extreme low temperature, the user can still use the umbrella normally in the purely mechanical manual mode, eliminating the user's concern that the electric umbrella cannot be used due to power failure and providing a high level of safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a straight-handled umbrella.

[0017] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0018] Figure 3 This is a side sectional view of a straight-handled umbrella.

[0019] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0020] Figure 5 for Figure 3 A magnified view of a section at point C.

[0021] Figure 6 for Figure 3 A magnified view of a section at point D.

[0022] Figure 7 for Figure 3 A magnified view of a section at point E in the middle.

[0023] Figure 8 This is a schematic diagram of the structure of the first gripper and the second gripper.

[0024] Figure 9 This is a structural schematic diagram of the first and second grippers from another perspective.

[0025] Figure 10 This is a side sectional view of the motor location.

[0026] In the diagram: 1. Straight handle umbrella; 10. First grip; 11. Locking groove; 20. Second grip; 21. Receiving cavity; 22. First sealing ring; 23. Second sealing ring; 24. Handle compartment; 25. Handle compartment cover; 30. Motor; 31. Magnet; 311. N-pole magnet; 312. S-pole magnet; 40. Drive shaft; 41. Spiral groove; 42. Retaining sleeve; 50. Umbrella rib assembly; 51. Lower rib; 511. Sleeve; 512. Insert; 513. Plunger; 5 14. Ball bearing; 52. Umbrella rib body; 521. First support link; 522. Second support link; 53. Sliding hinge; 531. Arc-shaped guide groove; 60. Power supply component; 70. Drive circuit board; 80. Switch component; 90. Bearing component; 100. Gasket; 110. Axial locking component; 120. Umbrella handle housing; 121. Stroke groove; 130. Locking component; 140. Umbrella top assembly; 141. Umbrella cap; 142. Top seat; 143. Connecting sleeve; 144. Rubber pad. Detailed Implementation

[0027] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0029] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0030] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0031] In a preferred embodiment, see Figures 1 to 10 This application provides a straight-handled umbrella 1, comprising: a first grip 10; a second grip 20 having an axially extending receiving cavity 21 inside, the first grip 10 and the second grip 20 being coaxially connected, and the first grip 10 being rotatable relative to the second grip 20; a motor 30 fixed within the receiving cavity 21, the motor 30 having an axially penetrating shaft hole; and a drive shaft 40 passing through the shaft hole and axially penetrating the second grip 20, the motor 30 being circumferentially connected to the drive shaft 40 to drive the drive shaft 40 to rotate. The umbrella rib assembly 50 includes a lower nest 51 and an umbrella rib body 52 that are movably connected to each other. One end of the drive shaft 40 extending out of the receiving cavity 21 is connected to the lower nest 51 to convert the rotational motion of the drive shaft 40 into the linear motion of the lower nest 51 along the axial direction of the drive shaft 40, so as to realize the opening and closing of the umbrella rib body 52. ​​The other end of the drive shaft 40 extending out of the receiving cavity 21 is circumferentially fixed to the first grip 10 by a spline. Thus, the drive shaft 40 can be driven to rotate by the motor 30 or by the user manually rotating the first grip 10.

[0032] Therefore, specifically, see Figure 4 The drive shaft 40 can be selectively driven to rotate by two power sources. The first is the electric mode, where the electromagnetic torque generated by the motor 30 directly drives the drive shaft 40, which is circumferentially connected to it, to rotate. The rotation of the drive shaft 40 then drives the lower nest 51 to move axially through the motion conversion mechanism, thus opening and closing the umbrella rib assembly 50. The second is the manual mode, where the motor 30 is not working, for example, when there is no power, or when the user chooses manual operation. In this case, the user can directly hold the first grip 10 and rotate it. Since the first grip 10 is circumferentially fixed to the lower end of the drive shaft 40, the rotational torque will be directly transmitted to the drive shaft 40, causing the drive shaft 40 to rotate synchronously. This can also drive the lower nest 51 to move axially, thus opening and closing the umbrella ribs. The manual operation and the electric operation share the same drive shaft 40 and the same motion conversion mechanism, and the two do not interfere with each other, thus maximizing the simplification of the transmission path.

[0033] Meanwhile, since the motor 30 and the first grip 10 share the same drive shaft 40 in this application, no switching mechanism is needed between manual and electric modes. The drive shaft 40 itself is both the output shaft of the motor 30 and the input shaft for manual mode. When the motor 30 is not powered on, since the motor 30 and the drive shaft 40 are allowed to be in a free state without power, when the user rotates the first grip 10, the torque directly drives the drive shaft 40 to rotate through the circumferential fixed connection. Throughout the process, the motor 30 is just a follower, almost undamped idler wheel, which does not interfere with manual operation at all. When the motor 30 is powered on, the electromagnetic... The torque acts directly on the drive shaft 40, driving it to rotate. At this time, the first grip 10, as the end of the drive shaft 40, will rotate synchronously. However, this will not affect the user's holding of the main handle of the second grip 20. This coexistence of electric and manual modes in the structure achieves the technical effect of a shorter transmission path and a more direct response. Even if the power is exhausted, there is a circuit failure, or the battery performance deteriorates due to extreme low temperature, the user can still use the umbrella normally in a purely mechanical manual way. This eliminates the user's concern that the electric umbrella cannot be used due to power failure and provides a high level of safety.

[0034] Furthermore, the motor 30 is a frameless torque motor, and the outer shell of the second grip 20 directly serves as the outer shell of the motor 30. This structure can minimize the radial distance and eliminate the radial thickness occupied by the motor shell in traditional motors. Under the condition of the same handle outer diameter, the effective torque output diameter of the motor 30 is maximized, significantly improving the energy density. Compared with traditional motors with shells, it can output greater torque in the same volume, or the grip part can be made thinner for the same torque requirement. The motor 30 in this application has an axially penetrating shaft hole, which is the central through hole of the motor 30. The drive shaft 40 is a long shaft extending axially, passing through the shaft hole of the motor 30 and penetrating the entire second grip 20 axially.

[0035] Regarding the selection of the type of motor 30 and its electrical connection method, this embodiment further refines the installation and driving scheme of the frameless torque motor. Specifically, the second holding member 20 is also provided with a power supply unit 60 and a drive circuit board 70. The power supply unit 60 is preferably a rechargeable battery. The drive circuit board 70 may contain a microcontroller and an inverter circuit. The microcontroller is used to receive switching signals and control the working state of the inverter circuit. The inverter circuit is used to convert DC power into three-phase AC power. The power supply unit 60 and the drive circuit board 70 are both fixed in the second holding member 20. The drive circuit board 70 and the power supply unit 60 are electrically connected through wires. The drive circuit board 70 and the motor 30 are electrically connected through three-phase lines.

[0036] Also see Figure 10On the outer circumferential surface of the section of the drive shaft 40 that passes through the shaft hole of the motor 30, multiple magnets 31 are fixed by means of adhesive or other methods. These magnets 31 specifically include N-pole magnets 311 and S-pole magnets 312. These magnets 31 are arranged alternately along the circumference of the drive shaft 40, forming an alternating N-pole and S-pole magnetic pole structure, with adjacent magnets 31 having opposite polarities. When an alternating current is applied to the frameless torque motor via a three-phase line, a rotating magnetic field is generated inside the motor 30. This rotating magnetic field interacts with the permanent magnets generated by the magnets 31. The interaction of magnetic fields generates electromagnetic torque, which drives the drive shaft 40, which is covered with magnets 31, to rotate. By controlling the frequency and phase of the signal output by the microcontroller on the drive circuit board 70, the speed and direction of the motor 30 can be precisely adjusted, thereby achieving precise control of the opening and closing speed and direction of the umbrella ribs. The drive scheme in this embodiment eliminates the mechanical commutator, resulting in no commutation sparks, high efficiency, and low operating noise. Furthermore, the magnets 31 are directly embedded on the drive shaft 40, making the structure compact and reducing energy loss in intermediate transmission links.

[0037] Furthermore, to facilitate the disassembly and maintenance of the power supply components and enhance the sealing of the handle, an optimized structural design is provided, see [reference needed]. Figure 4 and Figure 9 The power supply unit 60 and the drive circuit board 70 are housed in a handle compartment 24, which is separately separated from the area housing the motor 30 by a partition. The partition divides the housing cavity 21 of the second grip 20 into two parts: the lower part houses the motor 30 and the drive shaft 40, and the upper part is the handle compartment 24. This separation prevents short circuits caused by minor wear dust generated by the motor 30 and also allows the user to easily open the handle compartment 24 without disassembling the motor 30 when the battery needs to be replaced. A handle compartment cover 25 is provided on the upper part of the handle compartment 24, and a sealing ring is provided on the mating surface between the handle compartment cover 25 and the opening of the handle compartment 24. The sealing ring is pressed between the handle compartment cover 25 and the partition. When the handle compartment cover 25 is fastened and locked with screws, the sealing ring is subjected to uniform extrusion pressure and undergoes elastic deformation, filling all the tiny gaps on the mating surface. This effectively prevents external rainwater and moisture from seeping into the handle compartment 24 from the gaps in the handle, protecting the circuit components from moisture damage. At the same time, a switch 80 is also provided at the position of the handle compartment cover 25. The switch 80 adopts a recessed pressing structure, that is, the pressing surface of the switch is lower than the surface of the handle compartment cover 25 and the pressing surface is recessed within the surface contour line of the handle compartment cover 25. The recessed setting can effectively prevent the switch from being accidentally triggered during holding or storage, improving the safety of use.

[0038] Furthermore, a bearing component 90 is installed within the receiving cavity 21. Specifically, the bearing component 90 is a deep groove ball bearing, with its inner ring fitted onto the drive shaft 40 and its outer ring supported on the inner wall of the second gripping member 20. A gasket 100 is fitted between the bearing component 90 and the end face of the motor 30. This gasket 100 is specifically a corrugated gasket. The corrugated gasket is stamped from spring steel sheet, exhibiting a wavy undulation along the circumference and possessing axial elasticity. An axial locking member 110 is also provided on the drive shaft 40, located on the side of the bearing component 90 away from the corrugated gasket. The axial locking member 110 is specifically a locking nut. The locking nut pushes the bearing component 90 upward to transmit force to the corrugated gasket. After being compressed, the corrugated gasket applies its elastic force to the end face of the motor 30, thereby pressing the bearing component 90, the corrugated gasket, and the motor 30 axially. The wave-shaped gasket undergoes elastic deformation after being compressed, generating a stable axial preload. This preload continuously acts on the motor 30, ensuring that the motor 30 remains in a preset axial relative position within the receiving cavity 21. It will not be displaced due to axial movement of the transmission shaft 40 or external vibration. The preload of the axial locking member 110 ensures that the magnetic gap in the motor 30 remains uniform, guaranteeing the smoothness of the output torque of the motor 30 and eliminating collision noises caused by the presence of gaps during operation.

[0039] Regarding the external protection and guiding structure of the umbrella handle, this embodiment also includes an umbrella handle housing 120, which is fixedly connected to the upper end of the second grip 20 by screws. Specifically, at the overlapping section where the second grip 20 and the umbrella handle housing 120 are fitted together, screws are inserted radially to lock and fix them, with the screw heads recessed into the countersunk holes of the umbrella handle housing 120 and not exposed. To improve the environmental adaptability of the whole machine and prevent rainwater from flowing into the internal cavity along the umbrella handle and damaging the motor 30, a first sealing ring 22 and a second sealing ring 23 are respectively provided at both ends of the second grip 20. The first sealing ring 22 is installed at the rotating mating surface of the second grip 20 and the first grip 10, located in the annular gap between them, and can maintain a seal while the first grip 10 rotates; the second sealing ring 23 is installed at the connecting surface of the second grip 20 and the umbrella handle housing 120, and is pressed between their end faces. Through the above-mentioned multiple sealing structures, after rainwater flows down from the umbrella surface along the umbrella handle shell 120, the second sealing ring 23 prevents it from entering the interior of the second grip 20, while the first sealing ring 22 prevents rainwater from entering from the lower end of the handle. The multiple lines of defense work together to effectively block external moisture from entering the receiving cavity 21, protect the motor 30 and bearing components 90 from moisture corrosion, and extend the service life of the electric umbrella under frequent use in rainy weather.

[0040] After the end of the drive shaft 40 away from the first gripper 10 extends from the receiving cavity 21, it is received in the internal space of the umbrella handle housing 120. A stroke groove 121 extending axially is provided on the outer peripheral wall of the umbrella handle housing 120. The stroke groove 121 is a strip-shaped through groove that penetrates the housing wall, and the length of the groove determines the effective stroke of the umbrella ribs when opening and closing. The lower nest 51 includes a sleeve 511, which is slidably fitted onto the outside of the umbrella handle housing 120. The inner wall of the sleeve 511 has a protruding insert 512 that extends radially inward. The insert 512 and the sleeve 511 are integrally formed. The width of the insert 512 matches the width of the travel groove 121, and the insert 512 is embedded in the travel groove 121. When the sleeve 511 slides axially along the umbrella handle outer shell 120, the insert 512 moves synchronously within the travel groove 121. At the same time, the two sides of the insert 512 are constrained by the two side walls of the travel groove 121, restricting the circumferential rotation of the sleeve 511 relative to the umbrella handle outer shell 120, so that the lower rib 51 can only perform axial translation and cannot rotate. This ensures that the umbrella ribs are stable in posture during opening and closing, preventing torsional misalignment and ensuring that the umbrella ribs are evenly distributed when the umbrella is unfolded.

[0041] Furthermore, the transmission and motion conversion structure in this embodiment needs to be explained in detail; see [link to relevant documentation]. Figure 5 The transmission shaft 40 has a spiral groove 41 on the shaft segment corresponding to the stroke groove 121. The spiral groove 41 is a groove that extends axially along the outer cylindrical surface of the transmission shaft 40, and its cross-section is arc-shaped. Correspondingly, the lower socket 51 also includes a plunger 513 and a ball 514. The outer side of the plunger 513 is connected and fixed to the sleeve 511 as a whole. The inner end face of the plunger 513 faces the transmission shaft 40. The ball 514 is rotatably held between the inner end face of the plunger 513 and the sleeve 511. Between the groove surfaces of the spiral groove 41, a portion of the spherical surface of the ball 514 sinks into the spiral groove 41, contacting the bottom and wall of the groove 41, while the other portion of the spherical surface is constrained by the inner end face of the plunger 513. The inner end face of the plunger 513 is provided with a ball socket that matches the spherical surface of the ball 514. Specifically, the ball 514 on the plunger 513 remains in constant contact with the stroke groove 121 of the drive shaft 40. At the same time, the tail end of the plunger 513 is provided with an internal hexagon for easy disassembly or assembly.

[0042] When the drive shaft 40 is rotated by the motor 30 or manually, the balls 514 roll along the spiral groove 41 under the action of friction and constraint. Since the sleeve 511 is restricted from rotating by the insert 512 and the stroke groove 121, the balls 514 convert the rotational motion of the drive shaft 40 into an axial thrust on the plunger 513 and the entire sleeve 511, thereby driving the sleeve 511 to move up or down along the stroke groove 121 to complete the opening and closing action of the umbrella ribs. The transmission method of the spiral groove 41 and the balls 514 in this application has the advantages of high transmission efficiency and low friction loss compared with the traditional threaded transmission. The balls 514 experience rolling friction in the spiral groove 41, rather than the sliding friction in the threaded transmission.

[0043] It should also be noted that the geometric parameters of the spiral groove 41 have a significant impact on the opening and closing performance. In this embodiment, see... Figure 5 The pitch of the helical groove 41 ranges from 15 mm to 20 mm, and in a preferred embodiment, the pitch of the helical groove 41 is set to 17 mm. This 17 mm pitch design allows the drive shaft 40 to move the sleeve 511 a large axial distance with only a small rotation angle. In other words, this application uses a design of helical groove 41 and ball bearings 514. Unlike threaded connections in related technologies, where a larger pitch corresponds to a smaller thread minor diameter, the drive shaft 40 suffers from insufficient rigidity and is prone to breakage. Conversely, a smaller pitch requires a higher motor speed for the motor 30, resulting in lower torque and difficulty in opening the umbrella in extreme weather conditions such as strong winds, necessitating increased torque. The diameter of the machine 30 will increase accordingly, and the outer diameter of the second gripper 20 will also increase accordingly. However, the structure provided in this application, in which the spiral groove 41 and the ball 514 cooperate, does not have the above-mentioned drawbacks. The ball 514 will only roll along the spiral groove 41. The depth of the spiral groove 41 depends only on the diameter of the ball 514 and is not related to the pitch. Therefore, the pitch of the spiral groove 41 can be set to be large. When the drive shaft 40 rotates by a small angle, the corresponding ball 514 can move a long distance in the axial direction of the drive shaft 40. At the same time, the drive shaft 40 maintains sufficient rigidity and strength because it does not need to reduce its outer diameter.

[0044] Furthermore, the helix angle of the spiral groove 41 in this application is designed to be much larger than the equivalent friction angle between the ball 514 and the spiral groove 41 material. The equivalent friction angle depends on the friction coefficient of the contact surface material and the rolling friction characteristics. When the helix angle is greater than this angle, the spiral transmission mechanism no longer has self-locking capability. This means that after the umbrella is opened or closed and the motor 30 is de-energized, if the umbrella rib body 52 or sleeve 511 generates axial force due to its own gravity, this axial force will push the transmission shaft 40 in the opposite direction through the plunger 513 and the ball 514, causing the transmission shaft 40 to rotate. Without external constraints, the lower nest 51 will slide down on its own under gravity, causing the umbrella rib body 52 to close unexpectedly. To prevent the umbrella rib from accidentally slipping off in the non-operating state, this embodiment further provides a locking member 130, see [link to documentation]. Figure 8 The locking member 130 is mounted on the outer peripheral surface of the second grip 20 in a manner that allows it to move axially. Specifically, an axially extending slide rail is machined on the outer peripheral surface of the second grip 20, allowing the locking member 130 to slide up and down along the slide rail. Correspondingly, a locking groove 11 is formed on the outer peripheral surface of the upper end of the first grip 10. The opening of the locking groove 11 faces outward, and the shape of the groove matches the shape of the embedded part of the locking member 130. When the umbrella opening or closing action is completed and the motor 30 stops supplying power, the user can push the locking member 130 downward along the axial direction with their thumb, causing a portion of the locking member 130 to protrude into the locking groove 11 of the first grip 10. After the locking member 130 is embedded in the locking groove 11, it is locked. The first gripper 10 engages circumferentially with the first gripper 10, thereby restricting any circumferential rotation of the first gripper 10 relative to the second gripper 20. Since the lower end of the drive shaft 40 is circumferentially fixed to the first gripper 10 via a spline, the drive shaft 40 cannot rotate after the first gripper 10 is locked. At this time, even if the ball bearing 514 applies a reverse driving force to the drive shaft 40 under the action of gravity, the drive shaft 40 remains stationary due to circumferential locking. The sleeve 511 is then firmly locked in the current axial position and will not slide down under the action of gravity. This locking mechanism has a simple structure and is intuitive to operate. It can reliably lock with just one push action of the thumb, without the need for an additional electromagnetic brake or energy consumption. The purely mechanical locking is safe and reliable.

[0045] Further, see Figure 7At the top of the umbrella, the umbrella rib body 52 includes a first support link 521 and a second support link 522. One end of the first support link 521 is rotatably connected to the outer wall of the sleeve 511 of the lower nest 51 via a pin. The pin passes through the shaft hole at the end of the first support link 521 and the hinge seat on the outer wall of the sleeve 511, forming a hinge connection. The other end of the first support link 521 is movably connected to the second support link 522 via a sliding hinge 53. Specifically, the sliding hinge 53 is a sheet metal part with an arc-shaped guide groove 531. The sliding hinge 53 is fixedly connected to the end of the second support link 522 by rivets, and the two become a whole. The arc-shaped guide groove 531 is curved and extended, resembling the arc contour of a smiling face. The opening of the groove faces the first support link 521, and the corresponding end of the first support link 521 is embedded in the arc-shaped guide groove 531 and can slide along the trajectory of the arc-shaped guide groove 531. Due to the presence of the sliding hinge 53, the direction of the force during umbrella opening can be changed. When the sleeve 511 moves axially upward under the drive of the transmission shaft 40 to open the umbrella, the first support link 521 is pushed upward, and its end connected to the sliding hinge 53 slides from the beginning end to the end end of the arc-shaped guide groove 531. During this process, the sliding fit of the end of the first support link 521 in the groove changes the included angle between the two links and the direction of force transmission, efficiently converting the upward axial thrust of the lower nest 51 into the outward unfolding action of the second support link 522, without getting stuck at a certain position during the movement. The umbrella closing process is the opposite. The lower nest 51 moves downward, the end of the first support link 521 slides back along the arc-shaped guide groove 531, and the second support link 522 retracts inward under the traction of the first support link 521.

[0046] Regarding the top support and coaxiality maintenance of the drive shaft 40, this embodiment also includes an umbrella top assembly 140, as detailed below. Figure 6The umbrella top assembly 140 is fixedly connected to the top of the umbrella handle shell 120 away from the second grip 20. The umbrella top assembly 140 includes an umbrella cap 141, a top seat 142, and a connecting sleeve 143. The umbrella cap 141 is fixedly connected to the top seat 142, and a rubber pad 144 is provided in the interlayer between the umbrella cap 141 and the top seat 142 to buffer the impact force of the lower nest 51 on the top when the umbrella is opened and to increase the frictional damping between the components. The upper end of the connecting sleeve 143 is fixedly connected to the top seat 142, and the outer cylindrical surface of the connecting sleeve 143 can be fixed to the inner wall of the umbrella handle shell 120 by screwing. A retaining sleeve 42 is fitted on the end of the drive shaft 40 near the umbrella top assembly 140, i.e., the upper end of the drive shaft 40. The retaining sleeve 42 is a self-lubricating sleeve, and its inner hole is tightly fitted with the end journal of the drive shaft 40. The outer circumferential surface of the retaining sleeve 42 is precisely slidingly fitted with the inner hole of the connecting sleeve 143. With the support of the retaining sleeve 42, the top end of the drive shaft 40 and the umbrella handle housing 120 always maintain strict coaxiality, preventing the drive shaft 40 from radially swinging due to excessive cantilever length when rotating at high speed, avoiding frictional interference between the drive shaft 40 and the inner wall of the umbrella handle housing 120, thereby reducing operating noise and improving transmission efficiency and component life.

[0047] Furthermore, this embodiment integrates the above structure, and the overall workflow of the straight-handle umbrella 1 in this application is comprehensively described as follows: When the user needs to open the umbrella, he presses the switch 80. After receiving the switch signal, the drive circuit board 70 converts the DC power provided by the power supply 60 into three-phase AC power, which is then output to the frameless torque motor through the three-phase lines. This generates a rotating magnetic field inside the motor 30, which interacts with the drive shaft 40 embedded with magnets 31 to generate electromagnetic torque, driving the drive shaft 40 to rotate.

[0048] The spiral groove 41 of the drive shaft 40 converts the rotational motion of the drive shaft 40 into the upward motion of the sleeve 511 of the lower nest 51 along the stroke groove 121 of the umbrella handle shell 120 through the ball bearing 514. The ball bearing 514 rolls smoothly in the spiral groove 41. When the sleeve 511 rises, the first support link 521 is pushed by the rising lower nest 51. One end of the first support link 521, which is rotatably connected to the lower nest 51, moves upward, and the other end slides from the starting end to the end end in the arc-shaped guide groove 531 of the sliding hinge 53. At this time, the second support link 522 quickly unfolds. After entering the holding section, the umbrella rib body 52 gradually tightens until it is fully unfolded. When the sleeve 511 moves to the upper limit position of the stroke groove 121, the ball 514 reaches the upper end of the spiral groove 41, and the drive shaft 40 is limited and cannot continue to rotate. At this time, since the helix angle is much greater than the equivalent friction angle, the weight of the umbrella rib body 52 and the sleeve 511 generates a downward axial force. This axial force is applied in the opposite direction to the spiral groove 41 through the plunger 513 and the ball 514, pushing the drive shaft 40 to generate a rotational tendency. The user then pushes the locking member 130 along the outer periphery of the second grip member 20 with his thumb. Part of the locking member 130 slides into the locking groove 11 of the first grip member 10, and the first grip member 10 is circumferentially locked. Since the lower end of the drive shaft 40 is circumferentially fixed to the first grip 10 via a spline, the first grip 10 cannot rotate, and the drive shaft 40 is indirectly locked. The ball bearing 514 cannot push the drive shaft 40 to rotate, the lower nest 51 is firmly locked, and the umbrella rib body 52 remains fully open and will not slide down and close on its own under the action of gravity.

[0049] When the user needs to close the umbrella, first use the thumb to push the locking member 130 in the opposite direction. The locking member 130 disengages from the locking groove 11, the first grip member 10 returns to a rotatable state, the drive shaft 40 returns to a free rotation state, the drive shaft 40 reverses, the ball 514 rolls in the opposite direction along the spiral groove 41, driving the lower nest 51 down along the stroke groove 121. The end of the first support link 521 slides in the opposite direction in the arc-shaped guide groove 531 of the sliding hinge 53, returning to the starting end, pulling the second support link 522 to close, the umbrella rib body 52 closes, and when the lower nest 51 descends to the lower limit position of the stroke groove 121, the ball 514 reaches the lower end of the spiral groove 41, the drive shaft 40 is limited again, and the user can push the locking member 130 again to lock the closed state, preventing the umbrella from sliding open on its own during storage and carrying.

[0050] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A straight-handled umbrella, characterized in that, include: First gripper; The second grip has an axially extending receiving cavity inside, the first grip is coaxially connected to the second grip, and the first grip is rotatable relative to the second grip; The motor is fixed inside the receiving cavity, and the motor has a shaft hole that extends through the axis. A drive shaft passes through the shaft hole and axially through the second gripper; the motor is circumferentially connected to the drive shaft to drive the drive shaft to rotate. The umbrella rib assembly includes a lower nest and an umbrella rib body that are movably connected to each other. One end of the drive shaft extending out of the receiving cavity is drivenly connected to the lower nest to convert the rotational motion of the drive shaft into the linear motion of the lower nest along the axial direction of the drive shaft, so as to realize the opening and closing of the umbrella rib body. The other end of the drive shaft extending out of the receiving cavity is circumferentially fixed to the first grip, so that the drive shaft can be driven to rotate by the motor or driven to rotate by the user manually rotating the first grip.

2. The straight-handled umbrella as described in claim 1, characterized in that, The motor is a frameless torque motor.

3. The straight-handled umbrella as described in claim 2, characterized in that, Also includes: The power supply component and the drive circuit board are both fixedly connected to the second gripper. The drive circuit board is electrically connected to the power supply component and electrically connected to the frameless torque motor through a three-phase line. The drive shaft has multiple magnets fixed on its outer circumferential surface that passes through the shaft hole. The multiple magnets are arranged alternately along the circumference of the drive shaft to form alternating N and S poles.

4. The straight-handled umbrella as described in claim 1, characterized in that, Also includes: A bearing component, wherein the bearing component is located within the receiving cavity and is sleeved with the drive shaft; A gasket, wherein the gasket is sleeved on the drive shaft, the gasket is located between the bearing and the motor, and the gasket is a corrugated gasket; An axial locking member is provided on the drive shaft, and the axial locking member presses the bearing, the gasket and the motor together axially.

5. The straight-handled umbrella as described in claim 1, characterized in that, Also includes: The umbrella handle housing is connected to the second gripping member. The end of the drive shaft away from the first gripping member extends out of the receiving cavity and is housed in the umbrella handle housing. A stroke groove extending axially is formed on the outer peripheral wall of the umbrella handle housing. The lower nest includes a sleeve that is slidably fitted onto the outside of the umbrella handle shell. The inner wall of the sleeve is provided with an insert that is embedded in the travel groove.

6. The straight-handled umbrella as described in claim 5, characterized in that, The drive shaft has a spiral groove on the side near the umbrella rib assembly; The lower cavity also includes a plunger and a ball bearing. The plunger is fixedly connected to the sleeve, and the ball bearing is rotatably held between the plunger and the spiral groove. When the drive shaft rotates, the balls roll along the spiral groove, thereby driving the sleeve to reciprocate axially along the stroke groove.

7. The straight-handled umbrella as described in claim 6, characterized in that, The pitch of the spiral groove is 15 mm to 20 mm.

8. The straight-handled umbrella as described in any one of claims 1-7, characterized in that, Also includes: A locking element is movably disposed on the outer periphery of the second gripping element, and correspondingly, the outer periphery of the first gripping element is provided with a locking groove; At least a portion of the locking member is embedded in the locking groove to restrict circumferential rotation of the first grip member relative to the second grip member.

9. The straight-handled umbrella as described in any one of claims 1-7, characterized in that, The umbrella rib body also includes a first support link and a second support link. One end of the first support link is rotatably connected to the lower nest, and the other end is connected to the second support link through a sliding hinge. The sliding hinge is provided with an arc-shaped guide groove. The second support link is fixedly connected to the sliding hinge. The first support link is connected to the arc-shaped guide groove. When the lower nest moves along the axial direction of the transmission shaft, the end of the first support link slides along the arc-shaped guide groove to drive the second support link to unfold or retract relative to the first support link.

10. The straight-handled umbrella as described in claim 5, characterized in that, Also includes: The umbrella top assembly is connected to the umbrella handle housing. A retaining sleeve is fitted on the end of the drive shaft near the umbrella top assembly. The outer circumferential surface of the retaining sleeve mates with the inner wall of the umbrella handle housing so that the drive shaft and the umbrella handle housing remain coaxial.

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