A multi-fold umbrella with a central rod deployment structure

Abstract

This invention discloses a center-pole opening and closing structure for a multi-fold umbrella, comprising a center pole; the center pole includes an inner tube, a middle tube movably fitted within the inner tube, and an outer tube movably fitted within the middle tube; a center tube elastic positioner is fitted inside the middle tube, the center tube elastic positioner having a movable and automatically reset center tube positioning component, the center tube positioning head of the center tube positioning component being used to position and engage the middle tube with the outer tube; an inner tube pusher is fitted at the lower end of the inner tube, the inner tube pusher movably abutting against the inclined push surface of the center tube positioning component to control whether the center tube positioning head positions and engages the middle tube with the outer tube. This invention controls the opening and closing of the entire center pole through the inner tube, making the use of the umbrella smoother and more stable.

Description

Technical Field

[0001] This invention relates to the field of umbrellas, and in particular to a center pole unfolding and closing structure for a multi-fold umbrella. Background Technology

[0002] In the prior art, multi-fold umbrellas generally include a retractable center pole, an upper nest connected to the top of the center pole, a lower nest that is movably fitted onto the center pole, and a multi-fold umbrella frame that is pivotally connected to the upper and lower nests. The adjacent tubes of the existing center pole are positioned by elastic locators (commonly slingshots or marbles) when unfolded, thereby ensuring that the center pole remains in the unfolded state.

[0003] There are currently two configurations for the center rod of multi-fold umbrellas. The first configuration has a top-larger, bottom-smaller structure when the center rod is unfolded (i.e., the outer tube is on top and the inner tube is on the bottom). The second configuration has a top-smaller, bottom-larger structure when the center rod is unfolded (i.e., the inner tube is on top and the outer tube is on the bottom). For the second configuration, the center rod is retracted by moving the lower nut downwards, causing it to push against the positioning head of the elastic positioner. This retraction of the positioning head releases the positioning engagement of the center rod's tubes, allowing the center rod to retract. Because the second configuration has a top-smaller, bottom-larger structure when unfolded, the gap between the inner wall of the lower nut and the various tubes of the center rod increases from top to bottom. Therefore, the elastic positioning engagement of the uppermost tubes of the center rod... The positioning head of the locator needs to be large enough to ensure contact between the locating head and the lower canopy. If the locating head is not large enough, the middle rod tube will not be able to stably release the positioning engagement, resulting in unsmooth and unstable use of the umbrella. Therefore, the slingshot is currently used as the elastic locator for the middle rod of the second type of multi-fold umbrella. Compared to a marble, the slingshot can have a larger locating head. However, the slingshot body is V-shaped and is directly embedded in the middle rod tube. This makes the fit between the slingshot and the middle rod tube unreliable, and the slingshot is prone to displacement, causing the middle rod to malfunction and making the use of the multi-fold umbrella unreliable. In addition, for the middle rod of the second type of multi-fold umbrella, the lower canopy needs to push the locating head of the elastic locator to release the positioning engagement between the middle rod tubes, which makes the lower canopy prone to wear. Summary of the Invention

[0004] The purpose of this invention is to provide a center-pole unfolding and retracting structure for multi-fold umbrellas to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the solution of the present invention is:

[0006] A multi-fold umbrella's center-pole unfolding and closing structure includes a center pole; the center pole includes an inner tube, a middle tube movably fitted inside the inner tube, and an outer tube movably fitted inside the middle tube; a center tube positioning hole is provided on the lower end side wall of the middle tube; a center tube elastic positioner is fitted inside the middle tube, the center tube elastic positioner has a movable and automatically reset center tube positioning component, the center tube positioning component has a center tube positioning head and an inclined push surface, the center tube positioning head moves through the center tube positioning hole and is used to position and engage the middle tube with the outer tube; an inner tube pusher is fitted at the lower end of the inner tube, the inner tube pusher moves against the inclined push surface of the center tube positioning component to control whether the center tube positioning head positions and engages the middle tube with the outer tube.

[0007] The upper sidewall of the outer tube is provided with a positioning hole; the positioning head of the middle tube moves through the positioning hole of the outer tube to control whether the middle tube and the outer tube are positioned.

[0008] The upper end of the outer tube is fitted with an outer tube slider that slides with the middle tube, and the middle tube is provided with a middle tube stop that moves against the lower side of the outer tube slider.

[0009] The upper end of the outer tube is fitted with an outer tube slider that slides into the middle tube. The middle tube is provided with a middle tube stop that moves against the lower side of the outer tube slider. The middle tube positioning head moves against the upper side of the outer tube slider to control whether the middle tube and the outer tube are positioned. When the middle tube positioning head and the middle tube stop limit the upper and lower sides of the outer tube slider respectively, the middle tube and the outer tube are positioned.

[0010] The central tube elastic positioner includes a central tube fixing seat, a central tube positioning spring, and a central tube positioning component. The central tube fixing seat is fixed inside the central tube, and the central tube positioning component is movably fitted with the central tube fixing seat. The central tube positioning spring is disposed between the central tube positioning component and the central tube fixing seat and is used to drive the central tube positioning component to move and reset.

[0011] The central tube elastic positioner includes a central tube fixing seat, a central tube positioning spring, and a central tube positioning component. The central tube fixing seat is fixed inside the central tube, and the central tube positioning component is hinged to the central tube fixing seat. The central tube positioning spring is disposed between the central tube positioning component and the central tube fixing seat and is used to drive the central tube positioning component to rotate and reset.

[0012] The flexible positioning device for the central tube includes a central tube fixing seat and a central tube positioning component. The central tube fixing seat is fixed inside the central tube, and the central tube positioning component is integrally connected to the central tube fixing seat and has an elastic structure.

[0013] The multi-fold umbrella's center rod opening and closing structure further includes an upper nest and a lower nest; the center rod also includes a positioning sleeve, which fits into the upper end of the center tube; the upper nest is fixedly connected to the upper end of the inner tube; the lower nest is movably fitted onto the center rod and movably positioned with the positioning sleeve, and the lower nest extends upwards by a movable abutment against the top of the upper nest; when the multi-fold umbrella is opened, the lower nest is positioned with the positioning sleeve and its top abutment against the upper nest.

[0014] The middle tube is fitted with a middle tube slider that slides into the inner tube, and the inner tube is fitted with an inner tube stop block that moves against the lower side of the middle tube slider.

[0015] The positioning sleeve is provided with at least one elastic buckle; the lower nest is provided with a buckle hole that can be movably engaged with the elastic buckle of the positioning sleeve.

[0016] The middle rod also includes an extension tube that movably houses the outer tube; the lower end side wall of the outer tube has an outer tube lower positioning hole; an outer tube elastic positioner is fitted inside the outer tube, the outer tube elastic positioner has a movable and automatically reset outer tube positioning component, the outer tube positioning component has an outer tube positioning head and an inclined abutment surface, the outer tube positioning head moves through the outer tube lower positioning hole and is used to position and engage the outer tube with the extension tube; a middle tube pusher is fitted at the lower end of the middle tube, the middle tube pusher moves against the inclined abutment surface of the outer tube positioning component to control whether the outer tube positioning head positions and engages the outer tube with the extension tube.

[0017] The outer tube elastic positioner and the middle tube elastic positioner have the same structure.

[0018] The middle tube pusher is connected to the middle tube elastic positioner.

[0019] The upper sidewall of the extension tube is provided with an extension tube positioning hole; the outer tube positioning head moves through the extension tube positioning hole to control whether the outer tube and the extension tube are positioned.

[0020] The upper end of the extension tube is fitted with an extension tube slider that slides into the outer tube. The outer tube is provided with an outer tube stop that moves against the lower side of the extension tube slider. The outer tube positioning head moves against the upper side of the extension tube slider to control whether the outer tube and the extension tube are positioned. When the outer tube positioning head and the outer tube stop limit the upper and lower sides of the extension tube slider respectively, the outer tube and the extension tube are positioned.

[0021] With the above solution, when the multi-fold umbrella is opened (i.e., when the center tube unfolds), the inner tube pusher disengages from the center tube positioning member, and the center tube positioning member automatically resets, causing the center tube positioning head to move outward to position the center tube and outer tube. When the multi-fold umbrella is closed, the user pulls down the lower awning, which, through the umbrella frame, causes the upper awning and inner tube to move downward relative to the center tube. This causes the inner tube pusher to abut against the inclined push surface of the center tube positioning member, driving the center tube positioning member to move inward. This causes the center tube positioning head of the center tube positioning member to move inward to release the positioning between the center tube and the outer tube, allowing the outer tube to move relative to the center tube. Thus, under the downward movement of the lower awning, the center tube can be retracted into the outer tube.

[0022] As described above, this invention, by setting a flexible positioning device for the middle tube and an inner tube pusher on the middle tube and inner tube respectively, allows the positioning engagement between the middle tube and outer tube to be released by the downward movement of the inner tube. This eliminates the need for the lower tube to push against the positioning head of the flexible positioning device, ensuring effective release of the positioning engagement and making the use of the umbrella smoother and more stable. Furthermore, since the lower tube does not need to contact the positioning head of the flexible positioning device, the size of the positioning head does not need to be too large. At the same time, the flexible positioning device of this invention can fit more securely on the middle tube compared to a slingshot, making the use of multi-fold umbrellas reliable and stable. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 1 (Opening of multi-fold umbrellas);

[0024] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 2 (Opening of multi-fold umbrellas);

[0025] Figure 3 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 3 (Folding down multi-fold umbrellas);

[0026] Figure 4 Structural breakdown of Embodiment 1 of the present invention Figure 1 ;

[0027] Figure 5 Structural breakdown of Embodiment 1 of the present invention Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the push-pull sleeve according to Embodiment 1 of the present invention;

[0029] Figure 7 This is a cross-sectional view of the structure of Embodiment 1 of the present invention. Figure 1 (Opening of multi-fold umbrellas);

[0030] Figure 8 This is a cross-sectional view of the structure of Embodiment 1 of the present invention. Figure 2 (Opening of multi-fold umbrellas);

[0031] Figure 9 This is a cross-sectional view of the structure of Embodiment 1 of the present invention. Figure 3 (Folding down multi-fold umbrellas);

[0032] Figure 10 This is a cross-sectional view of the structure of Embodiment 2 of the present invention. Figure 1 (Opening of multi-fold umbrellas);

[0033] Figure 11 This is a cross-sectional view of the structure of Embodiment 2 of the present invention. Figure 2 (Folding down multi-fold umbrellas);

[0034] Figure 12 This is a cross-sectional view of the structure of Embodiment 3 of the present invention. Figure 1 (Opening of multi-fold umbrellas);

[0035] Figure 13 This is a cross-sectional view of the structure of Embodiment 3 of the present invention. Figure 2 (Folding down multi-fold umbrellas);

[0036] Label Explanation:

[0037] Middle rod 1, inner tube 11, inner tube stop 111, middle tube 12, middle tube slider 121, middle tube positioning hole 122, middle tube stop 123, outer tube 13, outer tube upper positioning hole 131, outer tube slider 132, outer tube lower positioning hole 133, outer tube stop 134, middle tube elastic positioner 14, middle tube fixing seat 141, guide block 1411, guide hole 1412, middle tube positioning component 142, middle tube positioning head 1421, sloping push surface; 1422, guide groove; 1423, middle tube positioning spring; 143, inner tube pusher; 15, positioning sleeve; 16, elastic buckle; 161, extension tube; 17, ball bearing; 171, extension tube slider; 172, outer tube elastic positioner; 18, outer tube fixing seat; 181, outer tube positioning component; 182, outer tube positioning head; 1821, sloping push surface; 1822, outer tube positioning spring; 183, middle tube pusher; 19.

[0038] Upper Nest 2,

[0039] Lower nest 3, buckle hole 31, top support 32, retaining edge 33, spring piece 34, stop block 341.

[0040] Push-pull sleeve 4, push-abutment part 41, push-abutment inclined surface 411, slide groove 42, limit block 421.

[0041] Connector 5. Detailed Implementation

[0042] like Figures 1 to 13 As shown, the present invention discloses a center pole unfolding and closing structure for a multi-fold umbrella, which includes a center pole 1, an upper nest 2, and a lower nest 3. The center pole 1 includes an inner tube 11, a middle tube 12 that movably houses the inner tube 11, and an outer tube 13 that movably houses the middle tube 12. The upper nest 2 is fixedly connected to the upper end of the inner tube 11. The lower nest 3 movably houses the center pole 1.

[0043] In this invention, a middle tube positioning hole 122 is provided on the lower end side wall of the middle tube 12, and a middle tube elastic positioner 14 is fitted inside the middle tube 12; the middle tube elastic positioner 14 has a movable and automatically reset middle tube positioning component 142, the middle tube positioning component 142 is provided with a middle tube positioning head 1421 and an inclined push surface 1422, the middle tube positioning head 1421 moves through the middle tube positioning hole 122 and is used to position and engage the middle tube 12 with the outer tube 13; and an inner tube pusher 15 is fitted at the lower end of the inner tube 11, the inner tube pusher 15 moves against the inclined push surface 1422 of the middle tube positioning component 142 to control whether the middle tube positioning head 1421 positions and engages the middle tube 12 with the outer tube 13.

[0044] When the multi-fold umbrella is opened (i.e., when the central tube 1 is unfolded), the inner tube pusher 15 disengages from the central tube positioning member 142, and the central tube positioning member 142 automatically resets, causing the central tube positioning head 1421 to move outward to position the central tube 12 and the outer tube 13, so that the central tube 12 and the outer tube 13 of the central tube 1 remain in the unfolded state. When the multi-fold umbrella is closed, the user pulls down the lower nest 3, and the lower nest 3 drives the upper nest 2 and the inner tube 11 to move downward relative to the central tube 12 through the umbrella frame. This causes the inner tube pusher 15 to abut against the inclined push surface 1422 of the central tube positioning member 142, driving the central tube positioning member 142 to move inward, so that the central tube positioning head 1421 of the central tube positioning member 142 moves inward to release the positioning between the central tube 12 and the outer tube 13. In this way, under the downward movement of the lower nest 3, the central tube 12 can be retracted into the outer tube 13, thus realizing the retraction of the central tube 1. As described above, by setting a central tube elastic positioner 14 and an inner tube pusher 15 on the central tube 12 and inner tube 11 respectively, the present invention releases the positioning engagement between the central tube 12 and the outer tube 13 by the downward movement of the inner tube 11. This eliminates the need for the lower vent 3 to push against the central tube positioning head 1421 of the central tube elastic positioner 14, thus ensuring effective release of the positioning engagement between the central tube 12 and the outer tube 13, making the use of the umbrella smoother and more stable. Furthermore, since the lower vent 3 does not need to contact the central tube positioning head 1421 of the central tube elastic positioner 14, the size of the central tube positioning head 1421 does not need to be too large, eliminating the need for a slingshot structure in the central tube elastic positioner 14. Simultaneously, the central tube elastic positioner 14 of the present invention can achieve a more stable engagement with the central tube 12 (e.g., the central tube elastic positioner 14 and the central tube 12 are completely tightly fitted circumferentially or locked by fasteners), making the use of multi-fold umbrellas reliable and stable.

[0045] Cooperate Figures 1 to 13As shown, in this invention, the central rod 1 further includes a positioning sleeve 16 that fits onto the upper end of the central tube 12. The lower nest 3 is movably positioned with the positioning sleeve 16. When the multi-fold umbrella is opened, the lower nest 3 is positioned with the positioning sleeve 16, thereby ensuring that the umbrella frame remains in the open state. The outer diameter of the positioning sleeve 16 can be adapted to the inner diameter of the lower nest 3, thus minimizing the gap between the lower nest 3 and the central rod 1 when the multi-fold umbrella is opened. This effectively prevents the lower nest 3 from wobbling relative to the central rod 1, making the multi-fold umbrella stable and reliable in use.

[0046] Cooperate Figures 1 to 13 As shown, in this invention, the positioning sleeve 16 of the middle rod 1 may be provided with at least one elastic buckle 161, and the lower nest 3 is provided with a buckle hole 31 that movably engages with the elastic buckle 161 of the positioning sleeve 16, so that the lower nest 3 and the positioning sleeve 16 are movably positioned and engaged; when the multi-fold umbrella is opened, the buckle hole 31 of the lower nest 3 engages with the elastic buckle 161 of the positioning sleeve 16, so that the lower nest 3 is held in the open position; the lower nest 3 may extend upwards with a top abutment 32 that movably abuts against the upper nest 2, so that when the multi-fold umbrella is opened... When the umbrella is open, the top part 32 abuts against the upper nest 2, restricting the position of the lower nest 3 when the umbrella is opened, so that the elastic buckle 161 of the positioning sleeve 16 can accurately engage with the buckle hole 31 of the lower nest 3. It should be noted that when the multi-fold umbrella is opened, the positioning sleeve 16 engages with the lower nest 3 and the lower nest 3 abuts against the upper nest 2. The positioning sleeve 16 is fitted to the upper end of the middle tube 12 and the upper nest 2 is fixedly connected to the upper end of the inner tube 11. In this way, the inner tube 11 will not move down relative to the middle tube 12, ensuring that the inner tube 11 and the middle tube 12 are relatively unfolded. The middle tube 12 is fitted with a middle tube slider 121 that slides with the inner tube 11. The inner tube 11 is fitted with an inner tube stop 111 that moves against the upper side of the middle tube slider 121. When the multi-fold umbrella is opened, the inner tube stop 111 abuts against the lower side of the middle tube slider 121 to prevent the inner tube 11 from coming off the middle tube 12. In this way, under the action of the inner tube stop 111, the middle tube slider 121, the positioning sleeve 16, the upper nest 2, and the lower nest 3, the inner tube 11 and the middle tube 12 achieve mutual positioning and engagement. This eliminates the need for the inner tube 11 to have holes for installing marbles or slingshots, as is the case with existing umbrellas, which helps to reduce the number of holes in the inner tube 11 and the middle tube 12. At the same time, it allows the inner tube 11 and the outer tube 13 to be effectively disengaged from the positioning engagement, making the use of the umbrella smoother and more stable.

[0047] Cooperate Figures 1 to 13As shown, in this invention, the lower umbrella 3 is movably fitted with a push-pull sleeve 4, which movably sleeves the lower umbrella 3. The push-pull sleeve 4 is provided with a pushing part 41 that movably abuts against the elastic buckle 161 of the positioning sleeve 16. When the user wants to close the umbrella, the user holds the push-pull sleeve 4 and moves it downward relative to the lower umbrella 3, so that the pushing part 41 of the push-pull sleeve 4 abuts against the elastic buckle 161 of the positioning sleeve 16, causing the elastic buckle 161 to disengage from the buckle hole 31 of the lower umbrella 3. Then, the push-pull sleeve 4 moves the lower umbrella 3 downward to the umbrella-closing position, thereby realizing the closing of the umbrella. When the user wants to open the umbrella, the user holds and moves the push-pull sleeve 4 upward, so that the push-pull sleeve 4 moves the lower umbrella 3 upward, causing the elastic buckle 161 of the positioning sleeve 16 to engage with the buckle hole 31 of the lower umbrella 3. The push-pull sleeve 4 has a push-pull slope 411 for abutting against the elastic buckle 161 of the positioning sleeve 16. The push-pull slope 411 is inclined outward from top to bottom. By setting the push-pull sleeve 4 with the push-pull slope 411, the push-pull sleeve 4 of the present invention can prevent the push-pull sleeve 4 from being jammed by the elastic buckle 161 of the positioning sleeve 16.

[0048] Cooperate Figures 1 to 13 As shown, in this invention, the inner wall of the push-pull sleeve 4 is provided with a sliding groove 42, and a limiting block 421 is provided in the sliding groove 42; the lower nest 3 is provided with a stop block 341 that slides with the sliding groove 42, and the stop block 31 moves against the lower side of the limiting block 421 to prevent the push-pull sleeve 4 from falling off the lower nest 3; the lower nest 3 is provided with a retaining edge 33, and the retaining edge 33 moves against the top of the push-pull sleeve 4 to prevent the push-pull sleeve 4 from falling off the lower nest 3; wherein, the lower nest 3 may be provided with a spring piece 34, and the stop block 341 is provided on the outside of the spring piece 34, and the spring piece 34 has a deformable ability to facilitate the insertion of the lower nest 3 into the push-pull sleeve 4.

[0049] Cooperate Figures 10 to 13 As shown, in this invention, the lower end of the central rod 1 is provided with a connector 5, which can be used to connect the umbrella head. The connector 5 and the umbrella head can be connected by a threaded connection. The connector 5 can be movably fastened with the push-pull sleeve 4. The connector 5 is provided with an elastic claw that movably hooks the push-pull sleeve 4. When the multi-fold umbrella is closed, the connector 5 is fastened with the push-pull sleeve 4 to prevent the central rod 1 from unfolding, so that the multi-fold umbrella is stably in the closed state.

[0050] To further explain the opening and closing structure of the middle rod 1 of the present invention, the present invention will be described in detail below through three embodiments.

[0051] Example 1:

[0052] Cooperate Figures 1 to 9As shown, in Embodiment 1 of the present invention, the central tube elastic positioner 14 includes a central tube fixing seat 141, a central tube positioning spring 143, and a central tube positioning member 142. The central tube fixing seat 141 is fixed inside the central tube 12, and the central tube positioning member 142 is movably fitted to the central tube fixing seat 141. The central tube positioning spring 143 is disposed between the central tube positioning member 142 and the central tube fixing seat 141 and is used to drive the central tube positioning member 142 to move and reset. The upper side wall of the outer tube 13 is provided with an outer tube upper positioning hole 131, and the central tube positioning head 1421 moves through the outer tube upper positioning hole 131 to control whether the central tube 12 and the outer tube 13 are positioned.

[0053] In Embodiment 1 of the present invention, when the multi-fold umbrella is opened (i.e., when the central tube 1 is unfolded), the inner tube pusher 15 disengages from the central tube positioning member 142. The central tube positioning member 142 automatically resets under the action of the central tube positioning spring 143, causing the central tube positioning head 1421 to move outward. This allows the central tube positioning head 1421 to pass through the positioning hole 131 on the outer tube, positioning the central tube 12 and the outer tube 13, thus keeping the central tube 12 and the outer tube 13 of the central tube 1 in an unfolded state. When the multi-fold umbrella is closed, the present invention uses... The user pulls down the lower nest 3, which in turn causes the upper nest 2 and inner tube 11 to move downward relative to the middle tube 12 through the umbrella frame. This causes the inner tube pusher 15 to abut against the inclined push surface 1422 of the middle tube positioning member 142, thereby driving the middle tube positioning member 142 to move inward. This causes the middle tube positioning head 1421 of the middle tube positioning member 142 to move inward and disengage from the positioning hole 131 on the outer tube, thus releasing the positioning between the middle tube 12 and the outer tube 13. In this way, under the downward movement of the lower nest 3, the middle tube 12 can be retracted into the outer tube 13, thereby achieving the retraction of the middle rod 1.

[0054] In Embodiment 1 of the present invention, the middle tube fixing seat 141 can be inserted into the lower end of the middle tube 12 by means of insertion and fitting. The middle tube fixing seat 141 can be completely and tightly fitted with the middle tube 12 in the circumferential direction, so that the middle tube fixing seat 141 is stably fixed inside the middle tube 12. The middle tube fixing seat 141 may be provided with a guide block 1411, and the middle tube positioning member 142 is provided with a guide groove 1423 that slides with the guide block 1411. In this way, with the cooperation of the guide block 1411 and the guide groove 1423, the middle tube positioning member 142 can move accurately, ensuring that the middle tube positioning member 142 can smoothly enter and exit the middle tube positioning hole 122 and the positioning hole 131 on the outer tube. The middle tube fixing seat 141 is provided with a guide hole 1412 for fitting the middle tube positioning spring 143. The guide hole 1412 can limit the middle tube positioning spring 143 and prevent the middle tube positioning spring 143 from running out of position. The outer tube 13 is fitted with an outer tube slider 132 that slides with the middle tube 12. The middle tube 12 is provided with a middle tube stop 123 that moves against the lower side of the outer tube slider 132. When the middle tube 12 and the outer tube 13 are unfolded relative to each other until the lower side of the outer tube slider 132 abuts against the middle tube stop 123, the middle tube positioning hole 122 and the upper positioning hole 131 of the outer tube are opposite each other, so that the middle tube positioning head 1421 of the middle tube positioning member 142 can accurately pass through the middle tube positioning hole 122 and the upper positioning hole 131 of the outer tube.

[0055] In Embodiment 1 of the present invention, the central rod 1 further includes an extension tube 17 that movably sleeves the outer tube 13. The extension tube 17 and the outer tube 13 are positioned and engaged by a ball bearing 171. The extension tube 17 can effectively increase the opening length of the central rod 1, ensuring that the user's hand can be placed at a comfortable height when holding the central rod 1, thus making it comfortable to use. It should be noted that the positioning and engagement structure between the extension tube 17 and the outer tube 13 can also adopt the positioning and engagement structure between the outer tube 13 and the central tube 12. That is, in this invention, the positioning and engagement between the outer tube 13 and the extension tube 17 can be released by moving the central tube 12 downward.

[0056] Example 2:

[0057] Cooperate Figure 10 and Figure 11 As shown, in Embodiment 2 of the present invention, the central tube elastic positioner 14 includes a central tube fixing seat 141, a central tube positioning spring 143, and a central tube positioning member 142. The central tube fixing seat 141 is fixed inside the central tube 12, and the central tube positioning member 142 is hinged to the central tube fixing seat 141. The central tube positioning spring 143 is disposed between the central tube positioning member 142 and the central tube fixing seat 141 and is used to drive the central tube positioning member 142 to rotate and reset. The outer tube 13 is equipped with an outer tube slider 132 that slides with the central tube 12. The central tube 12 is provided with a central tube stop 123 that moves against the lower side of the outer tube slider 132. The central tube positioning head 1421 moves against the upper side of the outer tube slider 132 to control whether the central tube 12 and the outer tube 13 are positioned.

[0058] In Embodiment 2 of the present invention, when the multi-fold umbrella is opened (i.e., when the central tube 1 is unfolded), the inner tube pusher 15 disengages from the central tube positioning member 142. The central tube positioning member 142 automatically rotates and resets under the action of the central tube positioning spring 143, causing the central tube positioning head 1421 to move outward. At this time, the central tube positioning head 1421 and the central tube stop 123 respectively limit the upper and lower sides of the outer tube slider 132, thus positioning the central tube 12 and the outer tube 13, so that the central tube 12 and the outer tube 13 of the central tube 1 remain in the unfolded state. When the multi-fold umbrella is... When closing the umbrella, the user pulls down the lower nest 3. The lower nest 3 drives the upper nest 2 and the inner tube 11 to move downward relative to the middle tube 12 through the umbrella frame. This causes the inner tube pusher 15 to abut against the inclined push surface 1422 of the middle tube positioning member 142, which in turn drives the middle tube positioning member 142 to rotate inward. This causes the middle tube positioning head 1421 of the middle tube positioning member 142 to move inward and release the upper limit of the outer tube slider 132, thereby releasing the positioning between the middle tube 12 and the outer tube 13. In this way, under the downward movement of the lower nest 3, the middle tube 12 can be retracted into the outer tube 13, thus realizing the retraction of the middle rod 1.

[0059] In the second embodiment of the present invention, the middle tube fixing seat 141 can be fitted into the lower end of the middle tube 12 by insertion and fitting. The middle tube fixing seat 141 can be completely and tightly fitted with the middle tube 12 in the circumferential direction, so that the middle tube fixing seat 141 is stably fixed in the middle tube 12. The middle tube fixing seat 141 is provided with a guide hole 1412 for sleeve of the middle tube positioning spring 143. The guide hole 1412 can limit the middle tube positioning spring 143 to prevent the middle tube positioning spring 143 from running out of position. The two ends of the middle tube positioning spring 143 can respectively abut against the middle tube positioning member 142 and the inner wall of the middle tube 12.

[0060] In the second embodiment of the present invention, the middle rod 1 further includes an extension tube 17 that movably sleeves the outer tube 13. The extension tube 17 and the outer tube 13 adopt a positioning fit structure between the outer tube 13 and the middle tube 12. That is, the present invention can release the positioning fit between the outer tube 13 and the extension tube 17 by moving the middle tube 12 downward. Specifically, in Embodiment 2 of the present invention, the lower end sidewall of the outer tube 13 is provided with an outer tube lower positioning hole 133; an outer tube elastic positioner 18 is fitted inside the outer tube 13, the outer tube elastic positioner 18 has a movable and automatically reset outer tube positioning component 182, the outer tube positioning component 182 is provided with an outer tube positioning head 1821 and an inclined abutment surface 1822, the outer tube positioning head 1821 moves through the outer tube lower positioning hole 133 and is used to position and engage the outer tube 13 with the extension tube 17; the lower end of the middle tube 12 is fitted with a middle tube pusher 19, the middle tube pusher 19 moves against the inclined abutment surface 1822 of the outer tube positioning component 182 to control whether the outer tube positioning head 1821 positions and engages the outer tube 13 with the extension tube 17.

[0061] In the second embodiment of the present invention, the outer tube elastic positioner 18 adopts the same structure as the middle tube elastic positioner 14. The outer tube elastic positioner 18 and the middle tube elastic positioner 14 can be oriented oppositely to help improve the stability of the opening and closing of the middle rod 1. The outer tube elastic positioner 18 specifically includes an outer tube fixing seat 181, an outer tube positioning spring 183 and an outer tube positioning member 182. The outer tube fixing seat 181 is fixed inside the outer tube 13. The outer tube positioning member 182 is hinged to the outer tube fixing seat 181. The outer tube positioning spring 183 is disposed between the outer tube positioning member 182 and the outer tube fixing seat 181 and is used to drive the outer tube positioning member 182 to rotate and reset. The upper end of the extension tube 17 is fitted with an extension tube slider 172 that slides with the outer tube 13. The outer tube 13 is provided with an outer tube stop 134 that moves against the lower side of the extension tube slider 172. The outer tube positioning head 1821 moves against the upper side of the extension tube slider 172 to control whether the outer tube 13 and the extension tube 17 are positioned. The middle tube pusher 19 can be connected to the middle tube elastic positioner 14, and the middle tube pusher 19 can be integrally connected to the middle tube fixing seat 141 of the middle tube elastic positioner 14. When the multi-fold umbrella is opened (i.e., when the central tube 1 is unfolded), the central tube pusher 19 disengages from the outer tube positioning member 182. The outer tube positioning member 182 automatically rotates and resets under the action of the outer tube positioning spring 183, causing the outer tube positioning head 1821 to move outward. At this time, the outer tube positioning head 1821 and the outer tube stop 134 respectively limit the upper and lower sides of the extension tube slider 172, thus positioning the outer tube 13 and the extension tube 17, so that the outer tube 13 and the extension tube 17 of the central tube 1 remain in the unfolded state. When the multi-fold umbrella is in... When closing the umbrella, the user pulls down the lower nest 3, causing the middle tube 12 to move downward relative to the outer tube 13. This causes the middle tube pusher 19 to abut against the inclined abutment surface 1822 of the outer tube positioning member 182, driving the outer tube positioning member 182 to rotate inward. This causes the outer tube positioning head 1821 of the outer tube positioning member 182 to move inward, releasing the restriction on the upper side of the extension tube slider 172. This releases the positioning between the outer tube 13 and the extension tube 17. Thus, under the downward movement of the lower nest 3, the outer tube 13 can be retracted into the extension tube 17, achieving the retraction of the middle rod 1.

[0062] As described above, by setting an outer tube elastic positioner 18 and a middle tube pusher 19 on the outer tube 13 and the middle tube 12 respectively, the present invention releases the positioning fit between the outer tube 13 and the extension tube 17 by the downward movement of the middle tube 12. In this way, the release of the positioning fit between the outer tube 13 and the extension tube 17 does not require the lower nest 3 to push against the outer tube positioning head 1821 of the outer tube elastic positioner 18, thereby ensuring that the positioning fit between the outer tube 13 and the extension tube 17 can be effectively released, making the use of the umbrella smoother and more stable. In addition, since the lower nest 3 does not need to abut against the outer tube positioning head 1821 of the outer tube elastic positioner 18, the size of the outer tube positioning head 1821 does not need to be too large, so the outer tube elastic positioner 18 does not need to adopt a slingshot structure. At the same time, the outer tube elastic positioner 18 of the present invention can make a more stable fit with the outer tube 13 (such as the outer tube elastic positioner 18 and the outer tube 13 being completely tightly fitted in the circumference or locked by fasteners), making the use of multi-fold umbrellas reliable and stable.

[0063] It should be noted that the outer tube elastic positioner 18 is not limited to positioning the outer tube 13 and the extension tube 17 by limiting the upper and lower sides of the extension tube slider 172 respectively through the outer tube positioning head 1821 and the outer tube stop 134; the present invention may also have an extension tube positioning hole opened on the upper side wall of the extension tube 17, and the outer tube positioning head 1821 moves through the extension tube positioning hole to control whether the outer tube 13 and the extension tube 17 are positioned.

[0064] In the second embodiment of the present invention, the outer tube slider 132 and the extension tube slider 172 can be fitted to the outer tube 13 and the extension tube 17 respectively without opening holes in the outer tube 13 and the extension tube 17. For example, the outer tube 13 is stamped to form the outer tube slider 132 or the outer tube slider 132 is welded to the inner wall of the outer tube 13, and the extension tube 17 is stamped to form the extension tube slider 172 or the extension tube slider 172 is welded to the inner wall of the extension tube 17. In this way, the openings are not visible when the entire middle rod 1 is unfolded, which makes the overall appearance and strength of the middle rod 1 good.

[0065] As can be seen from the foregoing, in Embodiment 2 of the present invention, the extension and retraction of the middle rod 1 is controlled by the movement of the inner tube 11, making the extension and retraction of the middle rod 1 more stable, reliable and smooth.

[0066] Example 3:

[0067] Cooperate Figure 12 and Figure 13As shown, the difference between Embodiment 3 and Embodiment 2 lies in the structural differences between the middle tube elastic positioner 14 and the outer tube elastic positioner 18. Specifically, in Embodiment 3, the middle tube elastic positioner 14 includes a middle tube fixing seat 141 and a middle tube positioning member 142. The middle tube fixing seat 141 is fixed inside the middle tube 12, and the middle tube positioning member 142 is integrally connected to the middle tube fixing seat 141 and has an elastic structure. The outer tube elastic positioner 18 includes an outer tube fixing seat 181 and an outer tube positioning member 182. The outer tube fixing seat 181 is fixed inside the outer tube, and the outer tube positioning member 182 is integrally connected to the outer tube fixing seat 181 and has an elastic structure.

[0068] In Embodiment 3 of the present invention, when the multi-fold umbrella is opened (i.e., when the central tube 1 is unfolded), the central tube pusher 19 disengages from the outer tube positioning member 182, and the outer tube positioning member 182 automatically resets under its own elastic force, causing the outer tube positioning head 1821 to move outward. At this time, the outer tube positioning head 1821 and the outer tube stop 134 respectively limit the upper and lower sides of the extension tube slider 172 to position the outer tube 13 and the extension tube 17, so that the outer tube 13 and the extension tube 17 of the central tube 1 remain in the unfolded state. Similarly, the inner tube pusher 15 disengages from the central tube positioning member 142, and the central tube positioning member 142 automatically rotates and resets under its own elastic force, causing the central tube positioning head 1421 to move outward. At this time, the central tube positioning head 1421 and the central tube stop 123 respectively limit the upper and lower sides of the outer tube slider 132 to position the central tube 12 and the outer tube 13, so that the central tube 12 and the outer tube 13 of the central tube 1 remain in the unfolded state.

[0069] In Embodiment 3 of the present invention, when the multi-fold umbrella is closed, the user pulls down the lower folding tube 3. The lower folding tube 3, through the umbrella frame, causes the upper folding tube 2 and the inner tube 11 to move downward relative to the middle tube 12. This causes the inner tube pusher 15 to abut against the inclined push surface 1422 of the middle tube positioning member 142, thereby driving the middle tube positioning member 142 to rotate inward. This causes the middle tube positioning head 1421 of the middle tube positioning member 142 to move inward, releasing the restriction on the upper side of the outer tube slider 132, thus releasing the gap between the middle tube 12 and the outer tube 13. After positioning, the lower nest 3 drives the middle tube 12 to move downward relative to the outer tube 13, which in turn causes the middle tube pusher 19 to abut against the inclined abutment surface 1822 of the outer tube positioning member 182, driving the outer tube positioning member 182 to rotate inward, causing the outer tube positioning head 1821 of the outer tube positioning member 182 to move inward and release the restriction on the upper side of the extension tube slider 172, thereby releasing the positioning between the outer tube 13 and the extension tube 17. Afterward, the lower nest 3 drives the outer tube 13 to move downward relative to the extension tube 17, thereby realizing the retraction of the middle rod 1.

[0070] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A center-pole unfolding and retracting structure for a multi-fold umbrella, characterized in that: Including mid-range baseball; The central rod includes an inner tube, a central tube that movably houses the inner tube, and an outer tube that movably houses the central tube. The lower end sidewall of the middle tube is provided with a middle tube positioning hole; a middle tube elastic positioner is fitted inside the middle tube. The middle tube elastic positioner has a movable and automatically reset middle tube positioning component. The middle tube positioning component is provided with a middle tube positioning head and an inclined push surface. The middle tube positioning head moves through the middle tube positioning hole and is used to position and fit the middle tube with the outer tube. The lower end of the inner tube is fitted with an inner tube pusher, which moves against the inclined push surface of the middle tube positioning component to control whether the middle tube positioning head positions and engages the middle tube with the outer tube. When the multi-fold umbrella is opened, the inner tube pusher disengages from the center tube positioning component, and the center tube positioning component automatically resets, causing the center tube positioning head to move outward to position the center tube and outer tube. When the multi-fold umbrella is closed, the lower canopy is pulled down, and the lower canopy moves the upper canopy and inner tube downward relative to the center tube through the umbrella frame. This causes the inner tube pusher to abut against the inclined push surface of the center tube positioning component, driving the center tube positioning component to move inward. This causes the center tube positioning head of the center tube positioning component to move inward to release the positioning between the center tube and outer tube.

2. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 1, characterized in that: The upper sidewall of the outer tube is provided with a positioning hole; the positioning head of the middle tube moves through the positioning hole of the outer tube to control whether the middle tube and the outer tube are positioned.

3. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 2, characterized in that: The upper end of the outer tube is fitted with an outer tube slider that slides into the middle tube, and the middle tube is provided with a middle tube stop that moves against the lower side of the outer tube slider.

4. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 1, characterized in that: The upper end of the outer tube is fitted with an outer tube slider that slides into the middle tube. The middle tube is provided with a middle tube stop that moves against the lower side of the outer tube slider. The middle tube positioning head moves against the upper side of the outer tube slider to control whether the middle tube and the outer tube are positioned. When the middle tube positioning head and the middle tube stop limit the upper and lower sides of the outer tube slider respectively, the middle tube and the outer tube are positioned.

5. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in any one of claims 1 to 4, characterized in that: The central tube elastic positioner includes a central tube fixing seat, a central tube positioning spring, and a central tube positioning component. The central tube fixing seat is fixed inside the central tube, and the central tube positioning component is movably fitted with the central tube fixing seat. The central tube positioning spring is disposed between the central tube positioning component and the central tube fixing seat and is used to drive the central tube positioning component to move and reset.

6. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in any one of claims 1 to 4, characterized in that: The central tube elastic positioner includes a central tube fixing seat, a central tube positioning spring, and a central tube positioning component. The central tube fixing seat is fixed inside the central tube, and the central tube positioning component is hinged to the central tube fixing seat. The central tube positioning spring is disposed between the central tube positioning component and the central tube fixing seat and is used to drive the central tube positioning component to rotate and reset.

7. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in any one of claims 1 to 4, characterized in that: The flexible positioning device for the central tube includes a central tube fixing seat and a central tube positioning component. The central tube fixing seat is fixed inside the central tube, and the central tube positioning component is integrally connected to the central tube fixing seat and has an elastic structure.

8. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 1, characterized in that: It also includes an upper nest and a lower nest; the middle rod also includes a positioning sleeve, which fits into the upper end of the middle tube; the upper nest is fixedly connected to the upper end of the inner tube; The lower nest is movably fitted onto the central rod and is movably positioned and engaged with the positioning sleeve. The lower nest extends upwards and movably abuts against the top of the upper nest. When the multi-fold umbrella is opened, the lower nest is positioned and engaged with the positioning sleeve, and its top abuts against the upper nest.

9. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 8, characterized in that: The middle tube is fitted with a middle tube slider that slides into the inner tube, and the inner tube is fitted with an inner tube stop block that moves against the lower side of the middle tube slider.

10. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 8, characterized in that: The positioning sleeve is provided with at least one elastic buckle; the lower nest is provided with a buckle hole that can be movably engaged with the elastic buckle of the positioning sleeve.

11. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 1, characterized in that: The middle rod also includes an extension tube that can be movably fitted with the outer tube; The lower end sidewall of the outer tube is provided with an outer tube lower positioning hole; an outer tube elastic positioner is fitted inside the outer tube, the outer tube elastic positioner has a movable and automatically reset outer tube positioning component, the outer tube positioning component is provided with an outer tube positioning head and an inclined abutment surface, the outer tube positioning head moves through the outer tube lower positioning hole and is used to position and fit the outer tube with the extension tube. The lower end of the middle tube is fitted with a middle tube pusher, which moves against the inclined surface of the outer tube positioning component to control whether the outer tube positioning head positions and engages the outer tube with the extension tube.

12. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 11, characterized in that: The outer tube elastic positioner and the middle tube elastic positioner have the same structure.

13. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 11 or 12, characterized in that: The middle tube pusher is connected to the middle tube elastic positioner.

14. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 11, characterized in that: The upper sidewall of the extension tube is provided with an extension tube positioning hole; the outer tube positioning head moves through the extension tube positioning hole to control whether the outer tube and the extension tube are positioned.

15. The center-pole unfolding and retracting structure of a multi-fold umbrella as described in claim 11, characterized in that: The upper end of the extension tube is fitted with an extension tube slider that slides into the outer tube. The outer tube is provided with an outer tube stop that moves against the lower side of the extension tube slider. The outer tube positioning head moves against the upper side of the extension tube slider to control whether the outer tube and the extension tube are positioned. When the outer tube positioning head and the outer tube stop limit the upper and lower sides of the extension tube slider respectively, the outer tube and the extension tube are positioned.

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