Eccentric umbrella

Abstract

The eccentric umbrella comprises an umbrella rod and an eccentric umbrella body assembly, a driving piston, a brake plunger and a driving piece are arranged in the umbrella rod, the eccentric umbrella body assembly comprises an upper umbrella hub, a lower umbrella hub and umbrella cloth, a group of main umbrella ribs and a plurality of groups of auxiliary umbrella ribs are hinged to the periphery of the upper umbrella hub, and the umbrella cloth covers the main umbrella ribs and the auxiliary umbrella ribs. The upper end of the umbrella rod is hinged to the middle of the main umbrella ribs through a hanging plate. The lower umbrella hub and the upper umbrella hub are kept coaxial through interaction of the plane spring and the cam terminal in a dynamic state, and are kept coaxial through matched conical surfaces in a static state (in a working state). The lower parachute hub is hinged to the driving piston through the driving arm to obtain parachute opening force, and in the opening process of the eccentric parachute, the brake plunger can limit rotation of the suspension plate in good time. The eccentric umbrella is simple in structure, high in shielding efficiency and good in dynamic stability and overall rigidity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of daily utensils, particularly to an eccentric umbrella. BACKGROUND

[0002] Traditional umbrella usually adopts the design of central symmetry, that is, the handle is located at the center of the umbrella. Although this design is simple in structure, in actual use, since the handle is located at the central part, the user can only use the edge of the umbrella to block, resulting in low actual use efficiency of the umbrella.

[0003] Therefore, the design of eccentric umbrella appears, but in the existing design of eccentric umbrella, the complex and cumbersome mechanism under the umbrella occupies a relatively large space and increases the eccentric moment, affecting the use of the user. SUMMARY

[0004] The utility model aims at solving the above technical problem. For this purpose, the utility model provides an eccentric umbrella, which solves the problems of opening umbrella stability and overall rigidity with a simple mechanism, and improves the problem of eccentric moment of hand holding.

[0005] According to the eccentric umbrella, the eccentric umbrella body assembly comprises an upper umbrella hub, a lower umbrella hub and an umbrella cloth, the outer periphery of the upper umbrella hub is hinged with a group of main umbrella ribs and a plurality of groups of auxiliary umbrella ribs, the umbrella cloth covers the main umbrella ribs and the auxiliary umbrella ribs, the middle part of the main umbrella rib is hinged to the upper end of the umbrella rod through a suspension plate, the lower umbrella hub is movably connected to the upper umbrella hub, the lower umbrella hub is coaxial with the upper umbrella hub, a plurality of support umbrella ribs are connected to the outer periphery of the lower umbrella hub, the first end of the support umbrella rib is hinged to the lower umbrella hub, and the second end of the support umbrella rib is hinged to the main umbrella rib or the auxiliary umbrella rib.

[0006] According to the eccentric umbrella, at least the following beneficial effects are achieved:

[0007] When the eccentric umbrella is opened, the piston is driven upward by the driving member, the driving piston pushes the lower umbrella hub and the upper umbrella hub coaxially close through the driving arm, the distance between the upper umbrella hub and the lower umbrella hub gradually decreases, the plurality of supporting ribs push the main ribs and the auxiliary ribs to unfold, in the process of moving the driving piston to the highest position, the brake plunger pushes the suspension plate to abut, thereby limiting the rotation of the suspension plate, preventing the main ribs from turning over, making the umbrella rod and the main ribs form a rigid structure, keeping the state of opening the umbrella, through the effective support of the main ribs and the supporting arm, the position of the eccentric umbrella body assembly is stabilized, and the influence of the eccentric moment is improved; when the eccentric umbrella is closed, the driving piston is driven downward by the driving member, and the eccentric umbrella body assembly is realized.

[0008] According to some embodiments of the utility model, the suspension plate is a U-shaped structure, the suspension plate has a plane plate, and the upper end face of the brake plunger is a plane.

[0009] According to some embodiments of the utility model, the brake plunger comprises two cylindrical members, and a spring is arranged between the two cylindrical members.

[0010] According to some embodiments of the utility model, the lower end face of the lower umbrella hub is connected with a plane spring, the first end of the supporting rib is provided as a cam, and the cam abuts against the plane spring; in the opening process, the cam pushes the plane spring to deform, thereby ensuring that the lower umbrella hub is coaxial with the upper umbrella hub at all times.

[0011] According to some embodiments of the utility model, the plane spring is a circular steel sheet, and a mounting hole is arranged at the center of the plane spring, and a lower cover bolt is arranged in the mounting hole.

[0012] According to some embodiments of the utility model, the lower end of the upper umbrella hub is provided with a conical hole, the upper end of the lower umbrella hub is provided as a cone and is inserted into the conical hole, and when the eccentric umbrella is in the opened state, the lower umbrella hub is tightly fitted with the inner wall of the conical hole.

[0013] According to some embodiments of the utility model, the main ribs are a group of two, the strength of the main ribs and the connection strength with the upper umbrella hub are greater than those of the auxiliary ribs, the upper umbrella hub is provided with a straight pin and a straight pin hole, and is specially used for connecting the main ribs. The outer periphery of the upper umbrella hub is provided with a retaining ring, and a plurality of auxiliary ribs are hinged to the retaining ring.

[0014] According to some embodiments of the utility model, the outer wall of the upper umbrella hub is provided with a convex ring supporting the retaining ring, the upper end of the upper umbrella hub is connected with a cap, and the cap limits the retaining ring.

[0015] According to some embodiments of the utility model, eccentric umbrella still include counterweight trademark, counterweight trademark is fixed in the outer end of main umbrella rib, counterweight trademark has demonstration part above umbrella cloth, and counterweight part below umbrella cloth.

[0016] According to some embodiments of the utility model, the driving part includes motor, screw rod and battery, the motor is electrically connected with the battery, the output shaft of the motor is connected with the screw rod through the shaft coupling, and the driving piston is screw connected with the screw rod.

[0017] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in combination with the drawings and examples, wherein:

[0019] Figure 1 It is the schematic view of eccentric umbrella retraction state of the utility model embodiment;

[0020] Figure 2 It is the schematic view in the process of eccentric umbrella deployment of the utility model embodiment

[0021] Figure 3 It is the schematic view of eccentric umbrella deployment state of the utility model embodiment;

[0022] Figure 4 It is Figure 3 It is the local enlarged schematic view of A in middle;

[0023] Figure 5 It is Figure 3 It is the local enlarged schematic view of B in middle;

[0024] Figure 6 It is the local section view enlarged schematic view of lower umbrella hub part in the utility model embodiment;

[0025] Figure 7 It is the connection structure enlarged schematic view between upper umbrella hub and umbrella rod in the utility model embodiment;

[0026] Figure 8 It is the local section view enlarged schematic view of umbrella cloth and counterweight trademark in the utility model embodiment.

[0027] The figure mark is as follows:

[0028] Umbrella shaft 100, drive piston 110, brake plunger 120, cylindrical piece 121, spring 122, drive 130, motor 131, screw 132, battery 133, suspension plate 140, eccentric umbrella body assembly 200, upper umbrella hub 210, straight pin 211, retaining ring 212, convex ring 213, cap 214, lower umbrella hub 220, umbrella cloth 230, main ribs 240, auxiliary ribs 250, support ribs 260, cam 261, flat spring 270, lower cover bolt 271, counterweight nameplate 280, display part 281, counterweight part 282. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0030] In the description of the present application, it should be understood that, in relation to the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0032] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting should be understood broadly, and the skilled in the art can determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.In the description of the utility model, the description of reference terms '' an embodiment '', '' some embodiments '', '' illustrative embodiment '', '' example '', '' specific example '' or '' some examples '' means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the description of the utility model, the illustrative representation of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] With reference to Figures 1 to 8 The utility model provides a eccentric umbrella, aim at providing a simple structure, open umbrella stable, whole rigidity strong and high shelter efficiency eccentric umbrella.

[0034] The eccentric umbrella comprises an umbrella rod 100 and an eccentric umbrella body assembly 200, the umbrella rod 100 is provided with a driving piston 110, a brake plunger 120 and a driving part 130, the eccentric umbrella body assembly 200 comprises an upper umbrella hub 210, a lower umbrella hub 220 and umbrella cloth 230 and other components.The following is the detailed description of each component and its working principle.

[0035] The umbrella rod 100 is the main supporting component of the eccentric umbrella, the driving piston 110 can be located inside the umbrella rod 100 or be sleeved outside the umbrella rod 100, the driving piston 110 can move along the axial direction of the umbrella rod 100 and generally cannot rotate relatively.The movement of the driving piston 110 is driven by the driving part 130, and the driving part 130 can select a motor, a pneumatic cylinder, an electric push rod and the like power device.The brake plunger 120 is located above the driving piston 110 and is also installed inside the umbrella rod 100.The main function of the brake plunger 120 is to overcome the overturning moment of the umbrella body on the top end of the umbrella rod when the umbrella cloth 230 is opened close to the end.The driving part 130 is used to provide power to drive the driving piston 110 to move along the axial direction of the umbrella rod 100.

[0036] The eccentric umbrella body assembly 200 is the main working component of the eccentric umbrella, including an upper umbrella hub 210, a lower umbrella hub 220, an umbrella cloth 230, main umbrella ribs 240, auxiliary umbrella ribs 250, and support umbrella ribs 260, etc.

[0037] The upper umbrella hub 210 is the top component of the eccentric umbrella body assembly 200, and a plurality of main umbrella ribs 240 and a plurality of auxiliary umbrella ribs 250 are hingedly connected to the outer periphery of the upper umbrella hub 210. The main umbrella ribs 240 and the auxiliary umbrella ribs 250 are uniformly distributed around the axis of the upper umbrella hub 210 and can rotate, thereby achieving the unfolding and folding of the umbrella cloth 230.

[0038] The lower umbrella hub 220 is located below the upper umbrella hub 210, that is, when the umbrella cloth 230 is unfolded, the lower umbrella hub 220 will move upward along the direction of the umbrella pole 100; when the umbrella cloth 230 is folded, the lower umbrella hub 220 will move downward along the direction of the umbrella pole 100. A plurality of support umbrella ribs 260 are connected to the outer periphery of the lower umbrella hub 220, the first end of the support umbrella rib 260 is hingedly connected to the lower umbrella hub 220, and the second end is hingedly connected to the main umbrella rib 240 or the auxiliary umbrella rib 250. When the umbrella cloth 230 is unfolded, the support umbrella rib 260 supports the main umbrella rib 240 and the auxiliary umbrella rib 250 to unfold outward, forming a stable umbrella cloth 230 structure. The driving piston 110 is hingedly connected with a driving arm 150, and the other end of the driving arm 150 is hingedly connected to the lower umbrella hub 220.

[0039] The umbrella cloth 230 covers the main umbrella rib 240 and the auxiliary umbrella rib 250, and is used to shield rain or sunlight. The material of the umbrella cloth 230 can be cloth, plastic or other waterproof material.

[0040] The main umbrella rib 240 is thicker than the auxiliary umbrella rib and helps to support the eccentric umbrella body assembly 200. There are two main umbrella ribs 240. The auxiliary umbrella rib 250 is more numerous and thinner. The middle part of the main umbrella rib 240 is hingedly connected to the upper end of the umbrella pole 100 through the suspension plate 140, and the suspension plate 140 can rotate, thereby achieving the unfolding and folding of the umbrella cloth 230.

[0041] The working principle of the eccentric umbrella is as follows:

[0042] The umbrella opening process: when it is necessary to open the umbrella cloth 230, the driving member 130 is started, driving the driving piston 110 to move upward along the axis of the umbrella pole 100. The driving piston 110 pushes the lower umbrella hub 220 to move to the upper umbrella hub 210 through the driving arm 150, and the distance between the lower umbrella hub 220 and the upper umbrella hub 210 gradually decreases. The lower umbrella hub 220 pushes the main umbrella rib 240 and the auxiliary umbrella rib 250 to unfold outward through the support umbrella rib 260. As the driving piston 110 continues to move, the umbrella cloth 230 gradually unfolds. When the driving piston 110 approaches the highest position, the pusher plunger 120 starts to abut against the suspension plate 140, thereby limiting the rotation of the suspension plate 140. When the driving piston moves to the highest point, the braking force reaches the maximum, so that the umbrella pole 100 and the main umbrella rib 240 form a rigid structure, maintaining the stable unfolding state of the umbrella cloth 230.

[0043] Opening process: when the umbrella cloth 230 needs to be opened, the driving member 130 is started to drive the driving piston 110 to move downward along the axis of the umbrella rod 100. The driving piston 110 drives the lower umbrella hub 220 to move downward through the driving arm 150, while the lower umbrella hub 220 pulls the main umbrella rib 240 and the auxiliary umbrella rib 250 inward to fold, and at the same time, the brake plunger 120 is separated from the suspension plate 140, and the suspension plate 140 can rotate around the axis of the umbrella rod 100, so as to realize the complete folding of the umbrella cloth 230.

[0044] The eccentric umbrella of the present application has the following technical effects:

[0045] Strong opening stability: through the cooperation of the driving piston 110, the brake plunger 120 and the suspension plate 140, when the umbrella cloth 230 is fully opened, the brake plunger 120 abuts against the suspension plate 140 to limit the rotation of the suspension plate 140, so that the umbrella rod 100 and the main umbrella rib 240 form a rigid structure, thereby maintaining the stable unfolded state of the umbrella cloth 230, and effectively solving the stability problem of the traditional eccentric umbrella in the opening process.

[0046] Good overall rigidity: through the effective support of the main umbrella rib 240, the auxiliary umbrella rib 250 and the support umbrella rib 260, a stable umbrella cloth 230 structure is formed. The support umbrella rib 260 not only connects the lower umbrella hub 220 and the main umbrella rib 240 / auxiliary umbrella rib 250, but also plays a role in increasing the overall rigidity of the umbrella cloth 230.

[0047] Provide a larger umbrella space: due to the structure of the eccentric umbrella body assembly 200, the umbrella cloth 230 can form a larger effective umbrella space when unfolded.

[0048] Reference Figure 5 and Figure 7In some embodiments of the utility model, the suspension plate 140 is designed as a U-shaped structure, which not only provides sufficient strength and stability, but also facilitates assembly with other components. The two side arms of the U-shaped suspension plate 140 are connected to the umbrella shaft 100 through a rotating pin, thereby realizing rotation, and the bottom thereof forms a flat plate. The presence of the flat plate provides a stable contact surface for the brake plunger 120, ensuring that the umbrella can be securely locked in the open state. The upper end surface of the brake plunger 120 is designed as a flat surface, which can accurately abut against the flat plate of the suspension plate 140 when the eccentric umbrella is in the open state. Through the flat-to-flat contact method, the locking reliability is improved. In addition, the suspension plate 140 can also be provided with a hole, and the upper end of the brake plunger 120 is inserted into the hole, or a clamping structure is adopted, as long as the relative fixation of the brake plunger 120 and the suspension plate 140 can be achieved. The suspension plate 140 adopts a U-shaped structure, which is a preferred structure that avoids piercing the umbrella cloth 230 and provides better waterproof performance.

[0049] Referring to Figure 5 In some embodiments of the utility model, the brake plunger 120 is composed of two cylindrical parts 121, which are coaxially arranged and limited inside the umbrella shaft 100, and can only move along the axial direction of the umbrella shaft 100. A spring 122 is arranged between the two cylindrical parts 121. When the eccentric umbrella is opened, the brake plunger 120 abuts against the suspension plate 140, at which time the spring 122 is compressed to a certain extent, so that the brake plunger 120 tightly abuts against the suspension plate 140, thereby having the functions of pre-acting, compensating for virtual position, and preventing shaking. Moreover, during the opening of the umbrella, due to the presence of the spring 122, the brake plunger 120 abuts against the suspension plate 140 in advance before the lower umbrella hub 220 moves to the highest position, thereby making the opening of the umbrella more stable.

[0050] Referring to Figure 6 In some embodiments of the utility model, the lower umbrella hub 220 serves as a bottom support, and a flat spring 270 is connected to the lower end surface thereof. The design of the flat spring 270 enables the support rib 260 to overcome axial eccentricity during opening. The first end of the support rib 260 is designed in the shape of a cam 261, so that the support rib 260 can push the flat spring 270 to deform when it is unfolded. This deformation force automatically adjusts the balance in the circumferential direction, so that the upper and lower umbrella hubs are always coaxial during the opening of the umbrella, thereby improving stability. In addition, the upper and lower umbrella hubs can also be provided with flat springs 270.

[0051] Further, the planar spring 270 is made of a circular steel sheet, and the circular shape matches the distribution state of the plurality of supporting ribs 260 to balance the stress in each direction. The center of the circular steel sheet is provided with a mounting hole, and a lower cover bolt 271 is arranged in the mounting hole to firmly fix the planar spring 270 on the lower umbrella hub 220 through the bolt. The lower cover bolt 271 simultaneously serves as a hinge seat of the driving arm 150, facilitating assembly.

[0052] With reference to Figures 2 to 4 In some embodiments of the utility model, the lower end of the upper umbrella hub 210 is designed to have a tapered hole, and the upper end of the lower umbrella hub 220 is correspondingly provided with an outer taper, so that the lower umbrella hub 220 can be closely inserted into the tapered hole of the upper umbrella hub 210 to form a stable support structure. As shown in Figure 4 When the eccentric umbrella is in an open state, the lower umbrella hub 220 closely abuts against the inner wall of the tapered hole, thereby enhancing the stability of the umbrella.

[0053] In actual use, due to the self-locking property of the tapered structure, the lower umbrella hub 220 can be easily inserted into the tapered hole, and the upper umbrella hub 210 remains stable and does not fall off when subjected to external force.

[0054] With reference to Figure 7 In some embodiments of the utility model, a set of main ribs 240 is used, and there are two main ribs 240, thereby improving the support strength of the umbrella cloth 230. The upper umbrella hub 210 is provided with a straight pin 211, and the two main ribs 240 are respectively provided with circular holes matched with the straight pin 211. The straight pin 211 is inserted into the circular holes, and the main ribs 240 and the upper umbrella hub 210 are connected to form a joint with high strength. Moreover, in the open state of the eccentric umbrella, the main ribs 240 play the role of a beam.

[0055] Further, in order to enhance the strength and stability of the umbrella, a retaining ring 212 is arranged on the outer periphery of the upper umbrella hub 210, and a plurality of auxiliary ribs 250 are hingedly connected to the upper umbrella hub 210 through the retaining ring 212. When the eccentric umbrella is in an open state, the auxiliary ribs 250 are kept in an open state under the action of the retaining ring 212 to provide stable support force for the umbrella cloth 230. At the same time, the design of the retaining ring 212 also simplifies the assembly process of the plurality of auxiliary ribs 250, and the connection strength is also much higher than that of the traditional connection method.

[0056] As Figure 4As shown, the outer wall of the upper umbrella hub 210 is provided with a convex ring 213 to support the retaining ring 212, in assembly, the retaining ring 212 is assembled into the upper end of the upper umbrella hub 210 in combination with a plurality of auxiliary ribs 250, and then the retaining ring 212 is supported by the convex ring 213, finally, the cap 214 is installed at the upper end of the upper umbrella hub 210, the cap 214 and the upper umbrella hub 210 can be threadedly connected, or can be clamped or other ways, the cap 214 and the convex ring 213 cooperate to clamp the retaining ring 212, and play a limiting role to prevent the retaining ring 212 from falling out.

[0057] With reference to Figure 3 In some embodiments of the present application, the counterweight brand plate 280 is fixedly installed at the outer end of the main rib 240, and the counterweight brand plate 280 can further balance the eccentric moment of the eccentric umbrella body assembly 200, which is beneficial to the user. The counterweight brand plate 280 has a display part 281 located above the umbrella cloth 230 and a counterweight part 282 located below the umbrella cloth 230. The display part 281 can be used to display brand identification or advertising information, thereby improving the commercial value of the umbrella. The counterweight part 282 balances the eccentric moment of the umbrella body by increasing the weight of the lower end of the rib.

[0058] With reference to Figure 8 The counterweight brand plate 280 includes two metal plates (corresponding to the display part 281 and the counterweight part 282, respectively) clamping the umbrella cloth 230, which can be fixed by screws or other fasteners, and the two metal plates are formed with clamping grooves on both sides to limit the two main ribs 240, thereby further fixing the counterweight brand plate 280 and improving the use reliability.

[0059] With reference to Figure 3 In some embodiments of the present application, the driving member 130 includes a motor 131, a screw rod 132, a battery 133 and the like. The motor 131 is electrically connected with the battery 133, and the battery 133 provides electric energy to the motor 131, and the control button is on the handle. The output shaft of the motor 131 is connected with the screw rod 132 through a shaft coupling, so as to realize the power output of the motor 131, and the driving piston 110 is threadedly connected with the screw rod 132. When the motor 131 rotates, the screw rod 132 rotates to drive the driving piston 110 to move linearly in the slotted range of the umbrella rod 100, so as to realize the automatic opening and closing of the umbrella cloth 230.

[0060] In addition, the driving member can also be manual, such as providing a sliding sleeve outside the umbrella rod 100, and the user pushes the sliding sleeve to move along the umbrella rod 100, and the sliding sleeve drives the driving piston 110 to move upward and downward, thereby realizing the opening and closing of the umbrella, and other manual driving members are also within the protection scope of the present application.

[0061] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.

Claims

1. An off-center umbrella characterized in that, The umbrella comprises: an umbrella rod, which is provided with a driving piston, a brake plunger and a driving member, the driving member being capable of driving the driving piston to move along the axial direction of the umbrella rod, the brake plunger being located above the umbrella rod; an eccentric umbrella body assembly, which comprises an upper umbrella hub, a lower umbrella hub and an umbrella cloth, the outer periphery of the upper umbrella hub being hingedly connected with a plurality of main ribs and a plurality of auxiliary ribs, the umbrella cloth covering the main ribs and the auxiliary ribs, the middle part of the main ribs being hingedly connected to the upper end of the umbrella rod through a suspension plate, the lower umbrella hub being movably connected to the upper umbrella hub, the lower umbrella hub and the upper umbrella hub always being coaxial, the outer periphery of the lower umbrella hub being connected with a plurality of support ribs, the first end of the support ribs being hingedly connected to the lower umbrella hub, and the second end of the support ribs being hingedly connected to the main ribs or the auxiliary ribs; wherein the driving piston is hingedly connected with a driving arm, the other end of the driving arm being hingedly connected to the lower umbrella hub, when the eccentric umbrella is opened, the driving piston pushes the brake plunger to abut against the suspension plate, so as to prevent the main ribs from being turned over.

2. A centralising umbrella according to claim 1, wherein, The suspension plate is in a U-shaped structure, the suspension plate has a flat plate, and the upper end surface of the brake plunger is flat, when the eccentric umbrella is in an open state, the upper end surface of the brake plunger abuts against the flat plate.

3. A offset umbrella as claimed in claim 1 or 2, wherein, The brake plunger comprises two cylindrical members, and a spring is arranged between the two cylindrical members.

4. The offset umbrella of claim 1, wherein, The lower end surface of the lower umbrella hub is connected with a flat spring, the first end of the support ribs is provided as a cam, and the cam abuts against the flat spring, in the opening process, the cam pushes the flat spring to deform.

5. A offset umbrella as claimed in claim 4, wherein, The flat spring is a circular steel sheet, and a mounting hole is arranged at the center of the flat spring, a lower cover bolt is arranged in the mounting hole.

6. The offset umbrella of claim 1, wherein, The lower end of the upper umbrella hub is provided with a conical hole, the upper end of the lower umbrella hub is conical and is inserted into the conical hole, when the eccentric umbrella is in an open state, the lower umbrella hub is tightly fitted with the inner wall of the conical hole.

7. The offset umbrella of claim 1, wherein, Each group of the main ribs is two, the upper umbrella hub is provided with a straight pin, the main ribs have a circular hole matched with the straight pin, the outer periphery of the upper umbrella hub is provided with a retaining ring, and a plurality of auxiliary ribs are hingedly connected to the retaining ring.

8. A offset umbrella as claimed in claim 7, wherein, The outer wall of the upper umbrella hub is provided with a convex ring supporting the retaining ring, the upper end of the upper umbrella hub is connected with a cap, and the cap defines the retaining ring.

9. A offset umbrella as claimed in claim 7, wherein, The eccentric umbrella further comprises a counterweight logo, which is fixed to the outer end of the main rib, the counterweight logo has a display part located above the umbrella cloth and a counterweight part located below the umbrella cloth.

10. The offset umbrella of claim 1, wherein, The driving member comprises a motor, a screw rod and a battery, the motor is electrically connected with the battery, the output shaft of the motor is connected with the screw rod through a shaft coupling, and the driving piston is threadedly connected with the screw rod.

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