Opening and closing structure of a flat-top umbrella

Abstract

This utility model discloses an opening and closing structure for a flat-top umbrella, including a support rod, an umbrella canopy, and umbrella ribs. A driving device is mounted on the support rod, and a supporting crossbar is connected to the support rod. A central disc is located at the outer end of the supporting crossbar. The umbrella ribs include main ribs located at both ends of the umbrella canopy and secondary ribs evenly distributed on the umbrella canopy. The main ribs are rotatably engaged with the central disc. A double-ended worm gear is mounted on the central disc, and each end of the double-ended worm gear has a worm section with opposite rotation directions. A turbine is located at the end of each main umbrella rib, adapted to the worm section. The driving device is connected to and drives the double-ended worm gear. The double-ended worm gear, in conjunction with the turbine on the main umbrella rib, allows the umbrella canopy to be in an open or closed state. The advantages of this utility model are: reasonable structure, convenient operation, effortless opening and closing, and low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of outdoor products technology, specifically to an opening and closing structure for a flat-top umbrella. Background Technology

[0002] Outdoor sun umbrellas are widely used in various outdoor scenarios. They not only provide shade but also protection from wind and rain. An outdoor sun umbrella mainly consists of a frame and a canopy. There are two main types: one type has a structure similar to a regular umbrella, with the support pole located in the center; the other type has the support pole on one side, creating a more spacious area under the umbrella.

[0003] For example, patent application CN202420516306.1, entitled "An Opening Structure for an Outdoor Umbrella," discloses an opening structure for an outdoor umbrella. The umbrella includes a pillar, a handle shell slidably connected to the pillar, a diagonal rod hinged at one end to the handle shell, an upper umbrella plate, and a lower umbrella plate below the upper umbrella plate. The upper and lower umbrella plates are connected by a telescopic rod. A connecting seat is fixedly mounted on the middle of the diagonal rod, and a lower connecting rod is hinged to the connecting seat. One end of the lower connecting rod is hinged to the lower umbrella plate. A needle roller bearing (first type) abuts against the outer wall of the lower connecting rod is mounted on the connecting seat. A mounting seat is hinged to the upper umbrella plate, and the upper end of the diagonal rod is inserted into the mounting seat. A needle roller bearing (second type) abuts against the outer wall of the upper umbrella plate is mounted on the mounting seat. However, the umbrella's frame structure is complex, resulting in significant stress on the opening structure. To meet the requirements for strength and opening / closing force, the material requirements are high, leading to high manufacturing costs. Therefore, its structure needs further improvement. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned deficiencies and to disclose to the public a flat-top umbrella opening and closing structure that is reasonable in structure, convenient in operation, labor-saving in opening and closing, and low in manufacturing cost.

[0005] The technical solution of this utility model is implemented as follows: A flat-top umbrella opening and closing structure includes a support rod, an umbrella canopy, and umbrella ribs. A drive device is mounted on the support rod, and a support crossbar is connected to the support rod. A central disc is located at the outer end of the support crossbar. The umbrella ribs include main ribs located at both ends of the umbrella canopy and secondary ribs evenly distributed on the umbrella canopy. The main ribs are rotatably engaged with the central disc. A double-ended worm gear is mounted on the central disc, and each end of the double-ended worm gear has a worm section with opposite rotation directions. A worm wheel adapted to the worm section is located at the end of each main umbrella rib. The drive device is connected to and drives the double-ended worm gear. The double-ended worm gear engages with the worm wheel on the main umbrella rib to open or close the umbrella canopy.

[0006] Further optimization measures for this technical solution are as follows: As an improvement, the inner end of the secondary umbrella rib is rotatably engaged with the central disc. This design ensures smooth opening and closing of the umbrella canopy.

[0007] As an improvement, rotating seats are spaced apart on the central disk, and bearings are provided between the rotating seats and the double-headed worm gear. This arrangement facilitates assembly and ensures the flexibility of the double-headed worm gear's rotation.

[0008] As an improvement, a tie rod is provided between the support rod and the support crossbar. The addition of the tie rod can improve the connection strength between the support rod and the support crossbar.

[0009] As an improvement, the driving device is a crank, which is connected to a first transmission chain, which in turn drives a second transmission chain, and the second transmission chain is connected to a double-headed worm gear.

[0010] As an improvement, the main ribs at both ends of the canopy are magnetically secured together when the canopy is open. This magnetic securing method is simple in structure and easy to manufacture.

[0011] As an improvement, the main ribs at both ends of the canopy are fixed with clips when the canopy is open.

[0012] As an improvement, a light is provided on the central disk.

[0013] The advantages of this utility model compared with the prior art are: This utility model discloses a simple and reasonable opening and closing structure for a flat-top umbrella, which is easy to operate. Its drive device transmits a double-headed worm gear, and through the cooperation of the double-headed worm gear and the worm wheels on the two main umbrella ribs, the synchronous movement of the two main umbrella ribs is achieved. The main umbrella ribs drive the umbrella surface in a fan-shaped motion, thereby opening or closing the flat-top umbrella. The high transmission ratio structure of the worm gear and worm wheel ensures smooth opening and closing of the flat-top umbrella and reduces operating noise to a certain extent. Furthermore, the umbrella ribs are arranged in the same plane. The main umbrella ribs drive the movement of the umbrella surface, while the secondary umbrella ribs support the umbrella surface. The rib structure is simple, the manufacturing cost is low, and the movement is completed within the same plane, resulting in a small space occupation for opening and closing the umbrella. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention in the closed umbrella state; Figure 2 This is a three-dimensional structural diagram of the present invention in the open state; Figure 3 yes Figure 2 A 3D structural diagram after removing the umbrella canopy; Figure 4 yes Figure 3 Enlarged view of section A in the middle; Figure 5This is a schematic diagram of the assembly relationship between the double-headed worm and the worm wheel of this utility model; Figure 6 This is a schematic diagram of the assembly relationship between the first and second transmission chains of this utility model.

[0015] The names of the reference numerals in the accompanying drawings of this utility model are: Support rod 1, support crossbar 11, center plate 12, rotating seat 12a, bearing 12b, umbrella canopy 2, main umbrella rib 31, secondary umbrella rib 32, double-headed worm gear 4, worm gear part 41, worm wheel 5, crank handle 6, first transmission chain 61, second transmission chain 62, lighting lamp 7. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings: The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0017] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0018] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0019] like Figures 1 to 6As shown, a flat-top umbrella opening and closing structure includes a support rod 1, an umbrella canopy 2, and umbrella ribs. A drive device is mounted on the support rod 1, and a support crossbar 11 is connected to the support rod 1. A central disc 12 is mounted on the outer end of the support crossbar 11. The umbrella ribs include main umbrella ribs 31 located at both ends of the umbrella canopy 2 and secondary umbrella ribs 32 evenly distributed on the umbrella canopy 2. The main umbrella ribs 31 are rotatably engaged with the central disc 12. A double-headed worm gear 4 is mounted on the central disc 12, and each end of the double-headed worm gear 4 has a worm section 41 with opposite rotation directions. A worm wheel 5, adapted to the worm section 41, is mounted at the end of each main umbrella rib 31. The drive device is connected to and drives the double-headed worm gear 4. The double-headed worm gear 4, in conjunction with the worm wheel 5 on the main umbrella rib 31, causes the umbrella canopy 2 to be in an open or closed state.

[0020] The inner end of the secondary umbrella rib 32 is rotatably engaged with the central disk 12.

[0021] Rotating seats 12a are spaced apart on the central disk 12, and bearings 12b are provided between the rotating seats 12a and the double-headed worm gear 4.

[0022] A tie rod 13 is provided between the support rod 1 and the support crossbar 11.

[0023] In this embodiment, a manual structure is adopted. The driving device is a crank 6, which is connected to a first transmission chain 61. The first transmission chain 61 drives a second transmission chain 62, which is connected to a double-headed worm gear 4. The direction of force is changed through a two-stage chain transmission, resulting in a simple structure. A transition shaft is provided between the first transmission chain 61 and the second transmission chain 62. Both the transition shaft and the double-headed worm gear 4 are equipped with sprockets to connect the transmission chains. The second transmission chain 62 is arranged along the support crossbar 11. One end of the second transmission chain 62 is connected to the first transmission chain 61, and the other end is connected to the double-headed worm gear 4. The transmission chains (first transmission chain 61 and second transmission chain 62) can be replaced by a synchronous belt.

[0024] As an extension, a motor can be used to replace the crank handle 5 to realize the electric opening and closing of the flat-top umbrella.

[0025] As an extension, the drive unit (handle 6) and the double-headed worm gear 4 can also be connected by a transmission chain, that is, one end of the transmission chain is connected to the handle 6 and the other end is connected to the double-headed worm gear 4.

[0026] In this embodiment, magnets are fixed on the main umbrella ribs 31, and the main umbrella ribs 31 at both ends of the umbrella surface 2 are magnetically attracted and fixed together when the umbrella is open. When the umbrella is opened, when the main umbrella ribs 31 rotate to the close position, they are automatically magnetically attracted and fixed together under the action of magnetic force. When the umbrella is closed, the main umbrella ribs 31 can be separated by overcoming the magnetic force.

[0027] As an extension, the main umbrella ribs 31 at both ends of the umbrella canopy 2 can also be secured with clips when the umbrella is open. When the umbrella canopy 2 is fully open, the operator can use the clips to secure the main umbrella ribs 31 at both ends together. When it is time to close the umbrella, the clips should be removed first before closing the umbrella.

[0028] A light 7 is provided on the central disk 12. The light 7 provides illumination at night. The light 7 is detachably connected to the central disk 12. After the light 7 is removed, a decorative cover can be attached to the outside of the mounting position.

[0029] Working principle: When opening the umbrella, turn the crank 5. The crank 5 drives the second transmission chain 62 through the first transmission chain 61. The second transmission chain 62 then drives the double-headed worm gear 4 to rotate. The worm part 41 on the double-headed worm gear 4 cooperates with the worm wheel 5 on the main umbrella rib 31 to drive the main umbrella rib 31 to rotate away from the support rod 1. As the main umbrella rib 31 rotates, it drives the umbrella surface 2 to make a fan-shaped motion until the two main umbrella ribs 31 rotate to the end away from the support rod 1, and the umbrella surface 2 opens.

[0030] Conversely, when closing the umbrella, turn the crank 5. The crank 5 drives the double-headed worm gear 4 to rotate in the opposite direction through the first transmission chain 61 and the second transmission chain 62, causing the main umbrella ribs 31 to rotate towards the support rod 1. As the main umbrella ribs 31 rotate, the umbrella canopy 2 closes until the two main umbrella ribs 31 rotate to the end close to the support rod 1, thus completing the closing of the umbrella.

[0031] The opening and closing structure of this utility model's flat-top umbrella employs a double-headed worm gear 4 in conjunction with a worm wheel 5 on the main umbrella ribs 31. The worm sections 41 at both ends of the double-headed worm gear 4 rotate in opposite directions, thereby enabling the two main umbrella ribs 31 to move synchronously in opposite directions. The high transmission ratio structure of the worm wheel and worm gear ensures smooth opening and closing of the flat-top umbrella and reduces operating noise to a certain extent. Furthermore, the umbrella ribs are arranged in the same plane, with the main umbrella ribs 31 driving the umbrella surface movement, while the secondary umbrella ribs 32 support the umbrella surface. The umbrella rib structure is simple, has low manufacturing cost, and the movement is completed within the same plane, resulting in minimal space occupied during opening and closing.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An opening and closing structure for a flat-top umbrella, comprising a support rod (1), an umbrella canopy (2), and umbrella ribs, wherein a driving device is provided on the support rod (1), characterized in that: The support rod (1) is connected to a support crossbar (11), and the outer end of the support crossbar (11) is provided with a central disk (12). The umbrella ribs include main umbrella ribs (31) provided at both ends of the umbrella surface (2) and secondary umbrella ribs (32) evenly provided on the umbrella surface (2). The main umbrella ribs (31) are rotatably engaged with the central disk (12). The central disk (12) is provided with a double-headed worm gear (4) that is rotatably engaged with the central disk (12). The two ends of the double-headed worm gear (4) are respectively provided with worm gear parts (41) with opposite directions of rotation. The end of the main umbrella rib (31) is provided with a worm wheel (5) that is adapted to the worm gear part (41). The driving device is connected to the transmission double-headed worm gear (4). The double-headed worm gear (4) and the worm wheel (5) on the main umbrella rib (31) cooperate to make the umbrella surface (2) in an open or closed state.

2. The opening and closing structure of the flat-top umbrella according to claim 1, characterized in that: The inner end of the secondary umbrella rib (32) is rotatably engaged with the central disk (12).

3. The opening and closing structure of the flat-top umbrella according to claim 2, characterized in that: Rotary seats (12a) are spaced apart on the central disk (12), and bearings (12b) are provided between the rotating seats (12a) and the double-headed worm gear (4).

4. The opening and closing structure of the flat-top umbrella according to claim 3, characterized in that: A tie rod (13) is provided between the support rod (1) and the support crossbar (11).

5. The opening and closing structure of the flat-top umbrella according to claim 4, characterized in that: The driving device is a crank (6), which is connected to a first transmission chain (61), which in turn drives a second transmission chain (62), and the second transmission chain (62) is connected to a double-headed worm gear (4).

6. The opening and closing structure of the flat-top umbrella according to claim 5, characterized in that: The main umbrella ribs (31) at both ends of the umbrella canopy (2) are magnetically fixed together when the umbrella is open.

7. The opening and closing structure of the flat-top umbrella according to claim 5, characterized in that: The main umbrella ribs (31) at both ends of the umbrella canopy (2) are fixed by fixing clips when the umbrella is open.

8. The opening and closing structure of the flat-top umbrella according to claim 6 or 7, characterized in that: The central disk (12) is equipped with a lighting lamp (7).

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