Gear separated umbrella joint

Abstract

This utility model discloses a gear-separated umbrella steering knuckle, belonging to the field of umbrella accessory technology. It includes an outer sleeve, an upper section rod, a lower section rod, an adjusting buckle, an adjusting sleeve, and a knob. The upper end of the outer sleeve is connected to the umbrella rod, and the upper end of the upper section rod is connected to the lower end of the outer sleeve. The lower end of the upper section rod has an upper gear part machined thereon. The lower section rod is rotatably connected inside the adjusting sleeve. The lower section rod includes a first gear and a second gear part coaxially connected by a fixed shaft pin. The adjusting buckle is placed between the first gear and the second gear of the lower section rod. The adjusting sleeve has a hole on one side of the adjusting buckle for connecting to the outside. The knob is installed on the outer surface of the adjusting sleeve and is connected to the adjusting buckle through the hole in the adjusting sleeve. In the natural state, the two lower gear parts mesh with the upper gear part of the upper section rod from the left and right sides simultaneously. The double-sided symmetrical meshing structure can provide a balanced and stable locking force, effectively preventing the steering knuckle from loosening and shaking under wind or external force, and improving locking reliability.

Description

Technical Field

[0001] This utility model belongs to the field of umbrella accessories technology, and more specifically, relates to a gear-separable umbrella steering knuckle. Background Technology

[0002] Umbrellas are commonly used tools for sun and rain protection in daily life. To adapt to different angles of sunlight and wind and rain, many umbrellas are equipped with adjustable steering knuckles. Existing steering knuckle adjustment mechanisms mostly use gear meshing and locking pins, which generally suffer from problems such as complex structure, easy wear, difficult unlocking, or easy loosening after locking. Although some products can achieve unidirectional or bidirectional adjustment, their internal transmission mechanisms are relatively complex, with many parts, resulting in high manufacturing costs. Moreover, after long-term use, they are prone to shaking due to component wear, leading to unstable locking, affecting user experience and safety. Therefore, there is an urgent need in this field for an umbrella steering knuckle with a simple structure, reliable locking, and flexible unlocking modes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gear-separated umbrella steering knuckle, which can meet the requirements of simple steering knuckle structure, reliable locking and flexible implementation of different unlocking modes.

[0004] This utility model discloses a gear-separated umbrella steering knuckle, comprising an outer sleeve, an upper section rod, a lower section rod, an adjusting buckle, an adjusting sleeve, and a knob. The upper end of the outer sleeve is connected to the umbrella rod, and the upper end of the upper section rod is connected to the lower end of the outer sleeve. The lower end of the upper section rod has an upper gear portion machined thereon. The lower section rod is rotatably connected inside the adjusting sleeve. The lower section rod includes a first gear and a second gear connected coaxially by a fixed shaft pin. The adjusting buckle is placed between the first and second gears of the lower section rod. The adjusting sleeve has a hole on one side of the adjusting buckle for connecting to the outside. The knob is installed on the outer surface of the adjusting sleeve and is connected to the adjusting buckle on one side of the hole of the adjusting sleeve by a fixed shaft pin. In the natural state, the two lower gear portions simultaneously mesh with the upper gear portion of the upper section rod from the left and right sides. The symmetrical meshing structure on both sides can provide a balanced and stable locking force, effectively preventing the steering knuckle from loosening and shaking under wind or external force, and improving locking reliability.

[0005] As a further improvement of this utility model, a spring groove is opened on the inner side of the lower end of the lower section rod, and a return spring is built into the spring groove. The return spring can apply inward pressure to the upper end of the first tooth and the second tooth to ensure tight meshing and allow the lower section rod to rotate back to its natural state when no external force is applied. The operation is simple and the safety is high.

[0006] As a further improvement of this utility model, the adjusting buckle includes a circular body with an extended protruding part on the outer side of the circular body. The inner side above the rotation center of the first tooth and the second tooth is provided with a recess that can jointly cover the adjusting buckle, providing a stable rotation center and installation reference for the adjusting buckle, ensuring the stability of the adjusting buckle during rotation, and preventing it from shifting or getting stuck.

[0007] As a further improvement of this utility model, the ejector part is set as a protrusion, which is located above the recess. The top two ends of the protrusion are provided with a pair of symmetrical drive apexes. The pair of drive apexes together form a forked wedge structure, so that when the adjusting buckle rotates, the drive apexes can first contact the toothed part on that side. No matter which direction the adjusting buckle rotates, there will always be a drive apexes that can hit the corresponding toothed part, which efficiently converts the rotational motion into the radial displacement of the toothed part. The force is direct and without jamming, realizing the single-sided unlocking and steering function.

[0008] As a further improvement of this utility model, the inner sides of the adjusting sleeve are provided with relief grooves, and the lower section rod is placed in the relief groove. The depth of the relief groove is not less than the maximum radial displacement of any point on the outer surface of the lower section rod relative to its initial position when it is rotated to the maximum angle. This avoids interference, collision or friction between the lower section rod and the inner wall of the adjusting sleeve during the adjustment process, ensuring that the steering adjustment action is always smooth and unobstructed. It also prevents rotation failure, abnormal noise or component wear caused by structural interference, and significantly improves the reliability and service life of the product.

[0009] As a further improvement of this utility model, the outer peripheral wall of the adjusting sleeve is provided with a mounting platform for accommodating the knob. The knob is disposed in the mounting recess, and the exposed surface of the knob does not protrude from the continuous surface of the outer peripheral wall of the adjusting sleeve, so that the knob and the adjusting sleeve form a flat or streamlined overall appearance, which improves the aesthetics of the product. At the same time, it avoids the risk of accidental snagging of clothing, collision with foreign objects, or injury to the user caused by the knob protruding, thus enhancing the safety and portability of the product.

[0010] As a further improvement of this utility model, the connection center of the knob and the adjusting buckle is located at one end of the knob. The connection center does not coincide with the center of the knob itself. When rotating, the lower end of the knob needs to be turned so that the force arm applied by the operator is maximized. It can generate sufficient torque with less force to overcome the elastic force of the return spring, making operation easier and reducing the burden of operation.

[0011] As a further improvement of this utility model, the ejector part is a pair of convex angles that extend symmetrically outward from both sides of the horizontal center line of the circular main body. The first tooth and the second tooth are each provided with a receiving groove on the arc-shaped concave contact surface of the adjusting buckle. The shape of the receiving groove matches the convex angle. In the locked state, the convex angle is embedded in the receiving groove, which plays a precise positioning and self-locking role, preventing the mechanism from unlocking on its own under vibration. When the adjusting buckle is rotated, the two convex angles act as cams at the same time, rotating out of the receiving groove and simultaneously pushing open the two teeth, realizing double-sided unlocking and steering, so that the upper rod can rotate freely in both upward and downward directions, providing users with a flexible adjustment experience.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the clamping locking mechanism with synchronous meshing of double-sided gears provides a balanced and powerful locking force, strong wind resistance, and effectively prevents loosening; by using the protrusion with a forked wedge-shaped apex or the adjustment buckle with different structures with symmetrical protrusions, two products, single-sided unlocking and double-sided unlocking, can be derived from the same basic structure to meet the needs of different users and have extremely strong versatility. The knob is designed using the lever principle and supplemented by a gear-driven transmission method, making the unlocking operation very effortless and smooth, resulting in a superior user experience. The built-in return spring ensures that the knob automatically and reliably returns to the locked state after unlocking, ensuring safety and convenience. The exposed surface of the knob does not protrude from the outer peripheral wall of the adjustment sleeve, creating a flat or streamlined overall appearance between the knob and the adjustment sleeve. This enhances the product's aesthetics and avoids the risk of the knob protruding and accidentally snagging on clothing, colliding with foreign objects, or injuring the user, thus improving the product's safety and portability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a top sectional view of the lower section rod and the adjusting sleeve 4 of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model in the unlocked state; Figure 6 This is a schematic diagram of the adjusting buckle structure of this utility model; Figure 7 This is a schematic diagram of the structure in the unlocked state of Embodiment 2 of this utility model.

[0014] Explanation of the labels in the diagram: 1. Outer sleeve; 2. Upper rod; 21. Upper gear; 3. Lower rod; 31. First gear; 32. Second gear; 33. Lower gear; 34. Spring groove; 35. Return spring; 36. Receiving groove; 4. Adjusting sleeve; 41. Clearance groove; 42. Mounting platform; 5. Adjusting buckle; 51. Circular body; 52. Protrusion; 521. Drive apex; 53. Protrusion; 6. Knob; 7. Fixing pin. Detailed Implementation

[0015] Specific Implementation Example 1: Please refer to Figures 1-6 This utility model relates to a gear-separated umbrella steering knuckle, comprising an outer sleeve 1, an upper section rod 2, a lower section rod 3, an adjusting buckle 5, an adjusting sleeve 4, a knob 6, and a fixing pin 7. The upper end of the outer sleeve 1 is connected to the umbrella rod, and the upper end of the upper section rod 2 is connected to the lower end of the outer sleeve 1, with an upper gear portion 21 machined at its lower end. The upper section rod 2 serves as a steering output shaft, and its rotation enables directional adjustment. The lower section rod 3 is rotatably connected inside the adjusting sleeve 4. The lower section rod 3 includes a first gear 31 and a second gear 32 coaxially connected by the fixing pin 7. The first gear 31 and the second gear 32 can rotate slightly relative to the adjusting sleeve 4. The inner sides of the upper ends of the first toothed member 31 and the second toothed member 32 are both machined with lower gear parts 33. The adjusting buckle 5 is placed between the first toothed member 31 and the second toothed member 32 of the lower section rod 3. The rotation of the adjusting buckle 5 can drive the first toothed member 31 or the second toothed member 32 to rotate. The adjusting sleeve 4 has a hole for connecting to the outside on one side of the adjusting buckle 5. The knob 6 is installed on the outer surface of the adjusting sleeve 4 and connected to the adjusting buckle 5 through the fixing pin 7, which facilitates the operator to link with the internal adjusting buckle 5. In the natural state, the two lower gear parts 33 simultaneously mesh with the upper gear part 21 of the upper section rod 2 from the left and right sides to lock the upper section rod 2.

[0016] In a further embodiment, such as Figures 5-6 As shown, the adjusting buckle 5 includes a circular body 51 and a protrusion 52. The protrusion is a protrusion with a pair of symmetrical driving apex angles 521 at both ends of the top of the protrusion 52. The inner side above the rotation center of the first tooth 31 and the second tooth 32 is provided with an arc-shaped recess that can jointly cover the circular body 51. The protrusion 52 is located above the recess. The pair of driving apex angles 521 together form a forked wedge structure, so that when the adjusting buckle 5 rotates, the driving apex angle 521 can first contact the tooth on this side. When the adjusting buckle 5 rotates towards the first tooth 31, the driving apex angle 521 on this side pushes open the first tooth 31 to make it rotate, thereby disconnecting the meshing connection between the lower gear part 33 and the upper gear part 21 of the first tooth 31, so that the upper section rod 2 can rotate towards the first tooth 31. Similarly, when the adjusting buckle 5 rotates towards the second tooth 32, the upper section rod 2 can rotate towards the second tooth 32.

[0017] In a further embodiment, such as Figures 3-5As shown, a spring groove 34 is opened on the inner side of the lower end of the lower section rod 3. A return spring 35 is built into the spring groove 34. The return spring 35 applies inward pressure to the upper ends of the first tooth 31 and the second tooth 32 to ensure tight meshing and to allow the lower section rod 3 to rotate back to its natural state when no external force is applied.

[0018] In a further embodiment, such as Figure 4 As shown, the adjusting sleeve 4 has clearance grooves 41 on both sides inside. The lower section rod 3 is placed in the clearance groove 41. The depth of the clearance groove 41 is not less than the maximum radial displacement of any point on its outer surface relative to its initial position when the lower section rod 3 rotates to the maximum angle. This provides space for the rotation of the lower section rod 3 and prevents interference during the rotation of the lower section rod 3, which could cause the steering knuckle to fail or the inner wall to be damaged during the rotation.

[0019] In a further embodiment, such as Figure 2 As shown, an inwardly recessed mounting platform 42 is provided on one side of the arc-shaped outer surface of the adjusting sleeve 4. The knob 6 is set on the mounting platform 42. The outer surface of the knob 6 does not protrude from the original outer contour of the adjusting sleeve 4, so that the knob 6 and the adjusting sleeve 4 form an approximately flat overall appearance, avoiding interference caused by the protrusion of the knob 6, and improving the safety and aesthetics of the product.

[0020] In a further embodiment, such as Figure 1 As shown, the connection center between the knob 6 and the adjusting buckle 4 is located at the upper end of the knob 6. The connection center does not coincide with the center of the knob 6 itself. When rotating, the lower end of the knob 6 needs to be turned to maximize the force arm applied by the operator. This allows sufficient torque to be generated with a small force to overcome the elastic force of the return spring 35, making operation easier and reducing the burden of operation.

[0021] In use, rotating the knob 6 causes the adjusting buckle 5 to rotate in any direction. The driving apex 521 of the adjusting buckle 5 only pushes the gear on the rotation direction side, causing it to overcome the force of the return spring 35 and rotate outward around the fixed shaft pin 7, resulting in the lower gear part 33 separating from the upper gear part 21. At this time, the other gear remains stationary, and its lower gear part 33 is still engaged with the upper gear part 21. Due to the constraint of the other gear, the upper rod 2 can only rotate in one direction. After adjustment, the knob is released, and the rotating gear is reset under the action of the return spring 35 and re-engaged and locked.

[0022] Specific Implementation Example 2: Please refer to Figure 7 The difference from Embodiment 1 is that the adjusting buckle 5 can unlock the lower section rod 3 in both directions at the same time. The adjusting buckle 5 is roughly circular in shape. A pair of convex corners 53 extend symmetrically outward from both sides of the horizontal center line of the circular body 51. Correspondingly, a receiving groove 36 is provided on the arc-shaped concave contact surface between the first tooth 31 and the second tooth 32 and the adjusting buckle 5. The shape of the receiving groove 36 matches the convex corner 53.

[0023] In its natural state, under the action of the return spring 35, the first tooth 31 and the second tooth 32 are pressed inward, and the protruding angles 53 on both sides of the adjusting buckle 5 are precisely accommodated and embedded in the receiving grooves 36 of the first tooth 31 and the second tooth 32. In this state, there is no interaction force between the adjusting buckle 5 and the first tooth 31 and the second tooth 32, and the lower gear part 33 of the two teeth maintains a tight double-sided meshing with the upper gear part 21 of the upper section rod 2, and the upper section rod 2 is firmly locked. When the adjusting buckle 5 is rotated by the knob 6, the protruding angles 53 rotate accordingly and rotate out of the corresponding receiving grooves 36. During the rotation, the protruding angles 53 simultaneously push the first tooth 31 outward. The sidewalls of the receiving grooves 36 of the first tooth 31 and the second tooth 32 force the first tooth 31 and the second tooth 32 to overcome the preload of the return spring 35 and rotate synchronously in opposite directions, so that the lower gear 33 of both are completely separated from the upper gear 21 at the same time. At this time, the upper rod 2 is freed from all constraints and can rotate freely in the left and right directions relative to the lower rod 3 to achieve bilateral angle adjustment. After the adjustment is in place, the knob 6 is released, and the first tooth 31 and the second tooth 32 are reset under the action of the return spring 35. Their inner walls press the convex angle 53, driving the adjusting buckle 5 to rotate until the convex angle 53 slides back into and is locked in the receiving groove 36, and the mechanism returns to the locked state.

Claims

1. A gear-separable umbrella steering knuckle, characterized in that: The assembly includes an outer sleeve (1), an upper rod (2), a lower rod (3), an adjusting buckle (5), an adjusting sleeve (4), a knob (6), and a fixing pin (7). The upper end of the outer sleeve (1) is connected to the umbrella rod, and the upper end of the upper rod (2) is connected to the lower end of the outer sleeve (1). The lower end of the upper rod (2) is machined with an upper gear (21). The lower rod (3) is rotatably connected inside the adjusting sleeve (4). The lower rod (3) includes a first gear (31) and a second gear that are coaxially connected by the fixing pin (7). (32) The adjusting buckle (5) is placed between the first tooth (31) and the second tooth (32) of the lower section rod (3). The adjusting sleeve (4) has a hole for connecting to the outside on one side of the adjusting buckle (5). The knob (6) is installed on the outer surface of the adjusting sleeve (4) and connected to the adjusting buckle (5) on one side of the hole of the adjusting sleeve (4) through the fixing pin (7). In the natural state, the two lower gear parts (33) mesh with the upper gear part (21) of the upper section rod (2) from the left and right sides at the same time.

2. The gear-separable umbrella steering knuckle according to claim 1, characterized in that: The lower end of the lower section rod (3) has a spring groove (34) on its inner side. The spring groove (34) contains a return spring (35), which can apply inward pressure to the upper ends of the first tooth (31) and the second tooth (32).

3. The gear separated umbrella forked knuckle according to claim 1, wherein: The adjusting buckle (5) includes a circular body (51), with an extended portion on the outer side of the circular body (51), and a recess that can jointly cover the adjusting buckle (5) is provided on the inner side above the rotation center of the first tooth (31) and the second tooth (32).

4. The gear-separable umbrella steering knuckle according to claim 3, characterized in that: The protruding part is a protrusion (52), which is located above the recess. The top two ends of the protrusion (52) are provided with a pair of symmetrical driving apex angles (521). The pair of driving apex angles (521) together form a bifurcated wedge structure, so that when the adjusting buckle (5) rotates, the driving apex angle (521) can first contact the first tooth (31) or the second tooth (32) on that side.

5. A gear-separable umbrella steering knuckle according to claim 1, characterized in that: The adjusting sleeve (4) has clearance grooves (41) on both sides inside. The lower section rod (3) is placed in the clearance groove (41). The depth of the clearance groove (41) is not less than the maximum radial displacement of any point on the outer surface of the lower section rod (3) relative to its initial position when it rotates to the maximum angle.

6. The gear separated umbrella forked knuckle according to claim 1, wherein: An installation platform (42) for accommodating a knob (6) is provided on the outer peripheral wall of the adjusting sleeve (4). The knob (6) is disposed in the installation platform (42), and the exposed surface of the knob does not protrude from the continuous surface of the outer peripheral wall of the adjusting sleeve (4).

7. A gear-separable umbrella steering knuckle according to claim 1, characterized in that: The connection center between the knob (6) and the adjusting buckle (5) is located at one end of the knob (6), and the connection center does not coincide with the center of the knob (6) itself.

8. A gear-separable umbrella steering knuckle according to claim 3, characterized in that: The top part is a pair of convex corners (53) that extend outward symmetrically on both sides of the horizontal center line of the circular body (51). A receiving groove (36) is opened on the arc-shaped concave contact surface of the first tooth (31) and the second tooth (32) and the adjusting buckle (5). The shape of the receiving groove (36) matches the convex corner (53).

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