A type of multi-fold umbrella rod

Abstract

This utility model relates to a multi-fold umbrella center rod, belonging to the technical field of umbrella center rods. It includes an inner tube, a middle tube, an outer tube, a handle, a snap-fit ​​component, and a connecting assembly. One end of the inner tube has an external thread and a first mounting groove. One end of the middle tube has a second mounting groove, and the other end has a first square hole. The outer tube is fitted onto one end of the middle tube, and one end of the outer tube has a second square hole. One end of the handle has a circular groove, and an internal thread matching the external thread is formed within the groove. One end of the inner tube extends into the circular groove. The snap-fit ​​component is installed at one end of the inner tube and the middle tube. The inner tube and the handle are connected by threads. Simultaneously, the outer tube, middle tube, and inner tube are detachably connected via the snap-fit ​​component and the limiting assembly. In case of partial damage, the corresponding tube can be replaced individually, reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of umbrella center rod technology, and in particular to a multi-fold umbrella center rod. Background Technology

[0002] The center rod of a multi-fold umbrella is a key supporting component, its core function being to connect the handle to the ribs and support the canopy. Its structure typically consists of an outer tube, a middle tube, and an inner tube, with each tube extending and retracting sequentially from the outside in according to its diameter to achieve the umbrella's folding and unfolding functions. Currently, relevant technical solutions exist, such as the Chinese utility model patent with publication number CN211021301U. This patent discloses a multi-fold umbrella center rod that improves the connection strength between the first rivet and the tube body by setting a first rivet and a first rivet rod on the outer wall of the inner and middle tubes, and a second rivet on the inner wall of the outer and middle tubes, combined with a sliding structure of guide grooves. This reduces the problem of rivet detachment during center rod stretching and, to a certain extent, ensures the stability of the center rod during use.

[0003] However, existing multi-fold umbrella center poles still have significant technical flaws, with the core issues concentrated on the ease of disassembly and repair, as well as maintenance costs. Most products use a one-piece fitting or non-separable fixing method between the tube and the handle, lacking a flexible, detachable connection structure. This design means that when a part of the center pole is damaged, such as deformation of the inner tube due to impact, wear on the inner wall of the tube, or cracking of the handle grip, the damaged part cannot be disassembled and replaced individually; the entire center pole assembly must be replaced. This not only significantly increases maintenance costs for users but also results in unnecessary waste of resources.

[0004] Meanwhile, the existing structure has a high maintenance threshold, making it difficult for ordinary users to perform repairs independently. Due to the lack of standardized disassembly and assembly mechanisms, the disassembly process often requires specialized tools, and the operation can easily cause secondary damage to undamaged tubes or connecting parts, further reducing the umbrella's ease of use and lifespan. Although some improved structures attempt to improve disassembly and assembly through simple elastic buckles, these buckles mostly rely on a single elastic component for support. After long-term repeated extension and retraction, elastic fatigue can easily occur, causing the tube to loosen or fail to reset. This, in turn, affects the support stability after the central rod is deployed, and even poses a safety hazard of the tube unexpectedly retracting during rainy weather.

[0005] In summary, the existing multi-fold umbrella center rods fail to effectively balance the core requirements of connection stability and ease of disassembly and assembly in their structural design. The high maintenance costs after partial damage, inconvenient repairs, and insufficient long-term stability have become key bottlenecks restricting product competitiveness and user experience. Therefore, there is an urgent need for a multi-fold umbrella center rod structure that allows for partial disassembly and replacement, and provides stable and reliable connections, in order to solve the above-mentioned technical defects. Utility Model Content

[0006] To overcome the technical defects of the existing technology, this utility model provides a multi-fold umbrella center rod, which can facilitate the replacement of parts.

[0007] The technical solution adopted by this utility model includes an inner tube, a middle tube, an outer tube, an umbrella handle, a snap-fit ​​component, and a connecting assembly. The inner tube has an external thread at one end and a first mounting groove at the other end. The middle tube is sleeved on one end of the inner tube, and a second mounting groove is provided at one end of the middle tube, while a first square hole is provided at the other end of the middle tube. The outer tube is sleeved on one end of the middle tube, and a second square hole is opened at one end of the outer tube; The umbrella handle has a circular groove at one end, and an internal thread matching the external thread is formed in the circular groove. One end of the inner tube extends into the circular groove. The snap-fit ​​component is installed at one end of the inner tube and the middle tube; The connection component includes: A limiting plate is slidably installed in the first mounting groove and the second mounting groove. Limiting grooves are opened on the inner side of the middle tube and the outer tube. One end of the limiting plate extends into the limiting groove. A damping telescopic rod is fixedly installed in the first mounting slot and the second mounting slot, and the free end of the damping telescopic rod is fixedly connected to the limiting plate; The first spring is sleeved on the outside of the damping telescopic rod.

[0008] Preferably, in order to allow the cylinder to be moved manually, a circular hole is provided at one end of both the middle tube and the outer tube.

[0009] Preferably, in order to enable the cylinder to move automatically, the snap-fit ​​component includes a cylinder and a second spring, and a positioning groove is provided at one end of the inner tube and the middle tube, and the cylinder is inserted into the positioning groove.

[0010] Preferably, in order to limit the position of the cylinder, one end of the cylinder extends into the circular hole.

[0011] Preferably, in order to enable the cylinder to automatically reset, one end of the second spring is fixedly installed in the positioning groove, and the other end of the second spring is fixedly connected to the cylinder.

[0012] Preferably, in order to facilitate the movement of the limiting plate, the dimensions of the first square hole and the second square hole are both matched with the dimensions of the limiting plate.

[0013] Preferably, in order to improve overall stability, the cross-sections of the inner tube, the middle tube, and the outer tube are all regular hexagonal.

[0014] Preferably, in order to enable the limiting plate to move, one end of the first spring is fixedly installed in the first mounting groove and the second mounting groove, and the other end of the first spring is fixedly connected to one end of the limiting plate.

[0015] The beneficial effects of this utility model are: the inner tube and the umbrella handle are connected by threads, and the outer tube, middle tube and inner tube are detachably connected by snap-fit ​​parts and limiting components. When a part is damaged, the corresponding tube can be replaced separately, reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the connection structure between the inner tube and the middle tube of this utility model.

[0018] Figure 3 This is a schematic diagram of the inner tube connection structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the exploded structure of the inner tube and umbrella handle of this utility model.

[0020] Figure 5 This is a schematic diagram of the snap-fit ​​component structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the connecting component structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Inner tube; 2. Middle tube; 3. Outer tube; 4. Umbrella handle; 5. Snap-fit ​​component; 501. Cylinder; 502. Second spring; 6. Connecting assembly; 601. Limiting plate; 602. Limiting groove; 603. Damping telescopic rod; 604. First spring; 7. External thread; 8. First mounting groove; 9. Second mounting groove; 10. First square hole; 11. Second square hole; 12. Circular groove; 13. Circular hole; 14. Positioning groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0024] like Figures 1-6As shown, this embodiment provides a multi-fold umbrella shaft, including an inner tube 1, a middle tube 2, an outer tube 3, an umbrella handle 4, a snap-fit ​​component 5, and a connecting assembly 6. The cross-sections of the inner tube 1, the middle tube 2, and the outer tube 3 are all regular hexagonal. The regular hexagonal cross-section can prevent relative rotation between the tubes, ensure that the umbrella ribs unfold in the same direction, and enhance wind resistance.

[0025] One end of the inner tube 1 is provided with an external thread 7, and the other end of the inner tube 1 is provided with a first mounting groove 8; The middle tube 2 is sleeved on one end of the inner tube 1. One end of the middle tube 2 is provided with a second mounting groove 9, and the other end of the middle tube 2 is provided with a first square hole 10. The outer tube 3 is sleeved on one end of the middle tube 2. A second square hole 11 is opened at one end of the outer tube 3. The dimensions of the first square hole 10 and the second square hole 11 are both consistent with the dimensions of the limiting plate 601.

[0026] One end of the umbrella handle 4 has a circular groove 12, and the circular groove 12 has an internal thread that matches the external thread 7. One end of the inner tube 1 extends into the circular groove 12. like Figure 5 As shown, the snap-fit ​​component 5 is installed at one end of the inner tube 1 and the middle tube 2. A circular hole 13 is provided at one end of both the middle tube 2 and the outer tube 3. The snap-fit ​​component 5 includes a cylinder 501 and a second spring 502. A positioning groove 14 is provided at one end of the inner tube 1 and the middle tube 2. The cylinder 501 is inserted into the positioning groove 14, with one end extending into the circular hole 13. One end of the second spring 502 is fixedly installed in the positioning groove 14, and the other end of the second spring 502 is fixedly attached to the cylinder 501. In operation, the cylinder 501 extends partially out of the positioning groove 14 of the inner tube 1 and the middle tube 2 under the elastic force of the second spring 502, and is embedded in the round hole 13 at one end of the middle tube 2 and the outer tube 3, thereby locking the tubes together and preventing accidental extension. When retraction is required, the cylinder 501 is manually moved inward, and the cylinder 501 is stored in the positioning groove 14 of the inner tube 1 and the middle tube 2 in sequence, so that the inner tube 1, the middle tube 2 and the outer tube 3 are in a nested retracted state.

[0027] like Figure 6 As shown, the connection component 6 includes: The limiting plate 601 is slidably installed in the first mounting groove 8 and the second mounting groove 9. Limiting grooves 602 are opened on the inner sides of the middle tube 2 and the outer tube 3. One end of the limiting plate 601 extends into the limiting groove 602. The damping telescopic rod 603 is fixedly installed in the first mounting groove 8 and the second mounting groove 9, and the free end of the damping telescopic rod 603 is fixedly connected to the limiting plate 601. The first spring 604 is sleeved on the outside of the damping telescopic rod 603. One end of the first spring 604 is fixedly installed in the first mounting groove 8 and the second mounting groove 9, and the other end of the first spring 604 is fixedly connected to one end of the limiting plate 601. During use, when partial replacement is required, the limiting plate 601 is manually moved inward through the first square hole 10 and the second square hole 11, so that the limiting plate 601 moves into the first mounting groove 8 or the second mounting groove 9. At this time, the limiting plate 601 disengages from the limiting groove 602, and the first spring 604 is subjected to... The compression is then applied, and the fixing effect of the snap-fit ​​5 is released, as well as the threaded connection between the inner tube 1 and the umbrella handle 4, thereby enabling the individual replacement of the corresponding tube body and reducing maintenance costs. When installing a new tube body, first manually move the limiting plate 601. The limiting plate 601 moves into the first mounting groove 8 or the second mounting groove 9, and at the same time move the cylinder 501 inward. The cylinder 501 is stored in the positioning groove 14, and then installation is performed. Under the action of the deformation force of the first spring 604, the limiting plate 601 automatically moves into the limiting groove 602 to achieve fixation.

[0028] Working principle: When the user opens the umbrella, the outer tube 3 drives the middle tube 2 to slide outward. The limiting groove 602 on the inner side of the middle tube 2 moves relative to the limiting plate 601 of the inner tube 1. The limiting plate 601 slides along the limiting groove 602 under the support of the damping telescopic rod 603. Furthermore, the inner tube 1, middle tube 2, and outer tube 3 all have regular hexagonal cross sections. The combination of these components restricts the circumferential rotation of the tube body, ensuring that the umbrella ribs unfold in the same direction. When the tube body extends to the preset position, the cylinder 501 of the snap-fit ​​5 pops out from the positioning groove 14 and embeds into the round hole 13 under the elastic force of the second spring 502, forming a rigid lock and preventing the tube body from retracting. When closing the umbrella, pressing the inner wall of the round hole 13 squeezes the cylinder 501, causing it to compress the second spring 502 and retract into the positioning groove 14, releasing the rigid lock. The tube body can then slide relative to each other. During the retraction of the tube body, the limiting plate 601 slides along the limiting groove 602. When partial replacement is required, it can be manually replaced through the connecting component 6, resulting in low maintenance costs.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications may be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A multi-fold umbrella center rod, characterized in that: It includes an inner tube (1), a middle tube (2), an outer tube (3), an umbrella handle (4), a snap-fit ​​component (5), and a connecting assembly (6); The inner tube (1) has an external thread (7) at one end and a first mounting groove (8) at the other end. The middle tube (2) is sleeved on one end of the inner tube (1), and a second mounting groove (9) is provided at one end of the middle tube (2), and a first square hole (10) is provided at the other end of the middle tube (2). The outer tube (3) is sleeved on one end of the middle tube (2), and a second square hole (11) is opened at one end of the outer tube (3). The umbrella handle (4) has a circular groove (12) at one end, and an internal thread matching the external thread (7) is provided in the circular groove (12). One end of the inner tube (1) extends into the circular groove (12). The snap-fit ​​component (5) is installed at one end of the inner tube (1) and the middle tube (2); The connection component (6) includes: A limiting plate (601) is slidably installed in the first mounting groove (8) and the second mounting groove (9). A limiting groove (602) is opened on the inner side of the middle tube (2) and the outer tube (3). One end of the limiting plate (601) extends into the limiting groove (602). The damping telescopic rod (603) is fixedly installed in the first mounting groove (8) and the second mounting groove (9), and the free end of the damping telescopic rod (603) is fixedly connected to the limiting plate (601); The first spring (604) is sleeved on the outside of the damping telescopic rod (603).

2. The multi-fold umbrella center rod according to claim 1, characterized in that: Both the middle tube (2) and the outer tube (3) have a round hole (13) at one end.

3. The multi-fold umbrella center rod according to claim 2, characterized in that: The snap-fit ​​component (5) includes a cylinder (501) and a second spring (502). The inner tube (1) and the middle tube (2) have a positioning groove (14) at one end, and the cylinder (501) is inserted into the positioning groove (14).

4. The multi-fold umbrella center rod according to claim 3, characterized in that: One end of the cylinder (501) extends into the circular hole (13).

5. The multi-fold umbrella center rod according to claim 4, characterized in that: One end of the second spring (502) is fixedly installed in the positioning groove (14), and the other end of the second spring (502) is fixedly connected to the cylinder (501).

6. The multi-fold umbrella center rod according to claim 1, characterized in that: The dimensions of the first square hole (10) and the second square hole (11) are both consistent with the dimensions of the limiting plate (601).

7. The multi-fold umbrella center rod according to claim 1, characterized in that: The cross-sections of the inner tube (1), the middle tube (2), and the outer tube (3) are all regular hexagonal.

8. The multi-fold umbrella center rod according to claim 1, characterized in that: One end of the first spring (604) is fixedly installed in the first mounting groove (8) and the second mounting groove (9), and the other end of the first spring (604) is fixedly connected to one end of the limiting plate (601).

Images