A rotating positioning structure of a bladeless fan air outlet pipe

Abstract

The utility model relates to a kind of rotary positioning structure of bladeless fan air outlet pipe, when positioning column is under the spring action and pops into positioning hole, clear and identifiable voice will be produced;Compared with the weak voice of traditional steel ball positioning, this voice feedback can let user quickly and accurately perceive whether gear switching is in place through hearing, effectively avoid the adjustment deviation caused by unclear gear perception, improve the precision of operation;In addition, the outer end corner of positioning column is provided with transition surface, compared with the point contact of traditional steel ball positioning and the surface contact of friction force positioning, transition surface can greatly reduce the friction resistance between positioning column and positioning hole;When user rotates air outlet pipe to adjust gear, positioning column can smoothly slide from one positioning hole to next positioning hole along transition surface under the elastic action of spring, avoid the common jamming, harsh phenomenon in traditional structure, operation hand feeling is more delicate and smooth, greatly improve the use experience.

Description

Technical Field

[0001] This utility model relates to the field of bladeless fan technology, and in particular to a rotary positioning structure for the air outlet pipe of a bladeless fan. Background Technology

[0002] In bladeless fan applications, users increasingly demand flexible adjustment of the airflow direction, and the rotating positioning structure of the air outlet duct is the core component for achieving this function. Currently, the rotating connection structure of the air outlet duct in traditional bladeless fans mainly relies on two mainstream solutions for positioning: friction positioning or steel ball positioning. However, both of these solutions have significant drawbacks in practical applications and are difficult to meet users' high-quality requirements for operating experience.

[0003] From the perspective of friction-based positioning, positioning is mainly achieved through the friction between the contact surface of the air duct and the connecting components. To ensure positioning stability, a relatively large contact pressure is usually required. This design means that when users rotate and adjust the air duct, they need to apply a large force to overcome the friction and complete the gear shift. This not only makes operation laborious but also easily leads to adjustment jamming and a stiff shifting feel, greatly affecting the smoothness of user operation.

[0004] While the ball bearing positioning system offers improved flexibility in gear shifting compared to friction positioning, it still presents key challenges. Firstly, the contact area between the ball bearing and the positioning groove is relatively small. During shifting, the collision between the ball bearing and the edge of the groove is minimal, resulting in a weak positioning sound. Users cannot clearly perceive whether the gear has been properly shifted, easily leading to over- or under-adjustment and reducing operational accuracy. Utility Model Content

[0005] The present invention aims to solve, at least to some extent, one of the problems existing in the prior art. To this end, the present invention proposes a rotary positioning structure for the air outlet pipe of a bladeless fan.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A rotary positioning structure for a bladeless fan exhaust duct includes a split pipe communicating with the bladeless fan duct. The split pipe is rotatably connected to an exhaust duct. The split pipe includes a connecting port. The exhaust duct has an insertion part rotatably mounted on the connecting port. A recess is provided on the inner wall of the connecting port. A positioning post is provided in the recess. A transition surface is provided at the outer corner of the positioning post. A spring is provided between the inner end of the positioning post and the bottom wall of the recess. A plurality of positioning holes are provided along the circumference of the outer wall of the insertion part. The outer end of the positioning post abuts against the positioning holes under the action of the spring.

[0007] In some embodiments, the insertion tube includes an insertion tube and a rotating sleeve. The insertion tube is fixedly connected to the air outlet pipe. An annular groove is provided on the inner wall of the connecting pipe opening. The rotating sleeve is rotatably disposed in the annular groove. When the insertion tube is inserted into the connecting pipe opening, it is snapped into the rotating sleeve. A concave hole is provided on the annular groove, and a positioning hole is provided on the rotating sleeve.

[0008] In some embodiments, a hook is provided on the rotating sleeve, and a groove that engages with the hook is provided on the outer wall of the insertion tube.

[0009] In some embodiments, a guide flange is provided on the inner wall of the rotating sleeve, and a guide groove that mates with the guide flange is provided on the outer wall of the insertion tube.

[0010] In some embodiments, the transition surface is an inclined surface, and the positioning hole is provided with a conical surface that mates with the transition surface.

[0011] In some embodiments, a spring fixing hole is provided at the inner end of the positioning post, and one end of the spring is disposed in the spring fixing hole.

[0012] In some embodiments, a limiting protrusion is provided on the bottom wall of the recess, and the other end of the spring is engaged with the limiting protrusion.

[0013] In some embodiments, the positioning post is made of metal or plastic.

[0014] In some embodiments, the outer wall of the rotating sleeve is provided with multiple anti-cavity recessed annular grooves.

[0015] In some embodiments, the diversion pipe includes an air inlet port communicating with the bladeless fan duct and two connecting pipe ports, the two connecting pipe ports being arranged on the left and right sides, and an air outlet pipe being connected to each of the two connecting pipe ports.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. First, the positioning pin and positioning hole are designed with a matching shape. When the positioning pin is springed into the positioning hole by the spring, it will produce a clear and recognizable sound. Compared with the weak sound of traditional steel ball positioning, this sound feedback allows users to quickly and accurately perceive whether the gear shift is in place by hearing. It effectively avoids adjustment deviations caused by unclear gear perception and improves the accuracy of operation. It is especially suitable for use in low light or obstructed vision scenarios.

[0017] 2. In addition, the outer corner of the positioning column is provided with a transition surface. Compared with the point contact of traditional steel ball positioning and the surface contact of friction positioning, the transition surface can significantly reduce the frictional resistance between the positioning column and the positioning hole. When the user rotates the air duct to adjust the gear, the positioning column can smoothly slide from one positioning hole to the next positioning hole along the transition surface under the elastic action of the spring. This avoids the jamming and stiffness common in traditional structures, making the operation more delicate and smooth, and greatly improving the user experience. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the diversion pipe and the air outlet pipe of this utility model.

[0019] Figure 2 This is one of the partial exploded views of this utility model.

[0020] Figure 3 This is the second partially exploded view of the present invention.

[0021] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0022] Figure 5 This is a schematic diagram of the rotating sleeve of this utility model. Detailed Implementation

[0023] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of this utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0024] like Figures 1-5 The rotary positioning structure of a bladeless fan exhaust duct shown includes a split pipe 2 connected to the bladeless fan duct. The split pipe 2 is rotatably connected to an exhaust duct 3. The split pipe 2 includes a connecting port 4. The exhaust duct 3 is provided with an insertion part 5 rotatably mounted on the connecting port 4. A recessed hole 6 is provided on the inner wall of the connecting port 4. A positioning post 7 is provided in the recessed hole 6. A transition surface 8 is provided at the outer corner of the positioning post 7. A spring 9 is provided between the inner end of the positioning post 7 and the bottom wall of the recessed hole 6. A plurality of positioning holes 10 are provided along the circumference of the outer wall of the insertion part 5. The outer end of the positioning post 7 abuts against the positioning hole 10 under the action of the spring 9.

[0025] When the bladeless fan is running, the airflow enters the splitter pipe 2 from the air duct, and then enters the outlet pipe 3 through the cooperation of the connecting pipe port 4 and the insert part 5, and finally exits from the outlet pipe 3. When the user needs to adjust the airflow direction, the outlet pipe 3 is manually rotated, and the insert part 5 rotates synchronously with the outlet pipe 3. The inner wall of the positioning hole 10 exerts a squeezing force on the outer end of the positioning post 7, compressing the spring 9 and causing the positioning post 7 to exit from the current positioning hole 10. The outlet pipe 3 is continuously rotated. When the next positioning hole 10 on the insert part 5 rotates to align with the positioning post 7, the spring 9 restores its elastic deformation, pushing the outer end of the positioning post 7 to re-insert into the new positioning hole 10, realizing the rotational positioning of the outlet pipe 3 and completing the airflow direction switching.

[0026] The positioning pin 7 and the positioning hole 10 are designed to fit each other. When the positioning pin 7 is pushed into the positioning hole 10 by the spring 9, it will produce a clear and recognizable sound. Compared with the weak sound of traditional steel ball positioning, this sound feedback allows users to quickly and accurately perceive whether the gear shift is in place by hearing. It effectively avoids adjustment deviations caused by unclear gear perception and improves the accuracy of operation. It is especially suitable for use in low light or obstructed vision scenarios.

[0027] In addition, the outer corner of the positioning post 7 is provided with a transition surface 8. Compared with the point contact of traditional steel ball positioning and the surface contact of friction positioning, the transition surface 8 can significantly reduce the frictional resistance between the positioning post 7 and the positioning hole 10. When the user rotates the air outlet 3 to adjust the gear, the positioning post 7 can smoothly slide from one positioning hole 10 into the next positioning hole 10 along the transition surface 8 under the elastic action of the spring 9, avoiding the jamming and stiffness common in traditional structures. The operation is more delicate and smooth, greatly improving the user experience.

[0028] Furthermore, the diversion pipe 2 includes an air inlet 92 that communicates with the bladeless fan duct and two connecting pipe ports 4, which are arranged on the left and right sides, and an air outlet pipe 3 is connected to each of the two connecting pipe ports 4.

[0029] When the bladeless fan is running, the airflow enters the air inlet 92 of the split pipe 2 from the air duct outlet. Under the guidance of the air duct inside the split pipe 2, it is evenly distributed to the left and right connecting pipe ports 4, and then enters the two air outlet pipes 3 through the connecting pipe ports 4 and is discharged. Users can independently rotate the left or right air outlet pipe 3 according to their needs: when rotating a single air outlet pipe 3, its corresponding insert 21 drives the rotating sleeve 22 to rotate in the annular groove 23. Positioning is achieved by the cooperation of the positioning post 7 and the positioning hole 10, without affecting the air outlet direction of the other air outlet pipe 3; the two air outlet pipes 3 can also be rotated at the same time to adjust to the same or different air outlet angles to achieve multi-directional and wide-range air outlet coverage.

[0030] See Figures 2-5As shown, the insertion tube 5 includes an insertion tube 21 and a rotating sleeve 22. The insertion tube 21 is fixedly connected to the air outlet 3. The inner wall of the connecting pipe port 4 is provided with an annular groove 23. The rotating sleeve 22 is rotatably disposed in the annular groove 23. When the insertion tube 21 is inserted into the connecting pipe port 4, it is snapped into the rotating sleeve 22. The concave hole 6 is provided on the annular groove 23, and the positioning hole 10 is provided on the rotating sleeve 22.

[0031] The insertion tube 5 is divided into two parts: the insertion tube 21 and the rotating sleeve 22. One end of the insertion tube 21 is integrally formed and fixed with the air outlet 3. An annular groove 23 is machined on the inner wall of the connecting pipe 4 of the diversion pipe 2. The width and depth of the annular groove 23 need to be adapted to the rotating sleeve 22 to ensure that the rotating sleeve 22 can rotate freely in the annular groove 23. At the same time, the concave hole 6 is adjusted to the inner wall of the annular groove 23, and the positioning hole 10 is machined on the outer wall of the rotating sleeve 22, and the position of the positioning hole 10 corresponds to the concave hole 6.

[0032] When the user rotates the air outlet pipe 3, the air outlet pipe 3 drives the insertion pipe 21 to rotate. Because the insertion pipe 21 is snapped together with the rotating sleeve 22, the rotating sleeve 22 rotates synchronously with the insertion pipe 21 in the annular groove 23 of the connecting pipe port 4. The positioning hole 10 on the outer wall of the rotating sleeve 22 cooperates with the positioning post 7 in the recessed hole 6 on the inner wall of the annular groove 23. The positioning post 7 is switched between the positioning holes 10 by the extension and retraction of the spring 9, thereby completing the positioning of the air outlet pipe 3. At the same time, the annular groove 23 plays a radial limiting role on the rotating sleeve 22 to prevent deviation during rotation.

[0033] It is worth mentioning that, since the insertion tube 21 and the rotating sleeve 22 are detachably connected, during the product packaging or transportation and storage stages, the air outlet duct 3 and the insertion tube 21 can be completely removed from the connecting port 4 of the diversion tube 2, allowing the diversion tube 2 and the air outlet duct 3 to be packaged separately. Compared with the traditional integrated structure, the components can be flexibly stacked according to their shape after being disassembled, avoiding the irregular whole formed by the assembly of the air outlet duct 3 and the diversion tube 2 occupying too much packaging space, significantly reducing the packaging volume, greatly improving the space utilization rate of transportation and storage, and reducing the logistics and warehousing costs of enterprises.

[0034] Furthermore, a hook 31 is provided on the rotating sleeve 22, and a groove 32 that cooperates with the hook 31 is provided on the outer wall of the insertion tube 21.

[0035] When the cannula 21 is inserted into the rotating sleeve 22, the outer wall of the cannula 21 presses against the hook of the latch 31, causing the latch 31 to undergo elastic deformation. When the cannula 21 is inserted into the slot 32 and aligned with the latch 31, the latch 31 returns to its original shape, and the hook automatically engages with the slot 32, thus achieving quick snap-fit ​​fixation between the cannula 21 and the rotating sleeve 22. If disassembly is required, simply apply an axial pulling force to deform the latch 31 again and disengage it from the slot 32.

[0036] Therefore, it adopts a flexible snap-on design, which eliminates the need for special tools during disassembly, making it convenient for later maintenance and component replacement.

[0037] Furthermore, a guide flange 41 is provided on the inner wall of the rotating sleeve 22, and a guide groove 42 that mates with the guide flange 41 is provided on the outer wall of the insertion tube 21.

[0038] Specifically, 1-2 guide flanges 41 are machined along the axial direction on the inner wall of the rotating sleeve 22. The guide flanges 41 are elongated and their length is consistent with the axial length of the rotating sleeve 22. On the outer wall of the insertion tube 21, an axial guide groove 42 is machined at the position corresponding to the guide flanges 41. The cross-sectional shape of the guide groove 42 matches that of the guide flanges 41.

[0039] Thus, through the cooperation of the guide flange 41 and the guide groove 42, during the assembly stage, the cooperation of the guide flange 41 and the guide groove 42 plays a positioning and guiding role, ensuring that the circumferential position of the insertion tube 21 and the rotating sleeve 22 is accurately aligned, avoiding the subsequent positioning hole 10 and positioning post 7 not being able to correspond due to assembly deviation; during the use stage, when the insertion tube 21 drives the rotating sleeve 22 to rotate, the cooperation of the guide flange 41 and the guide groove 42 can further limit the relative circumferential displacement of the two, ensuring that the rotation action is synchronized, while reducing the shaking during the rotation process.

[0040] See Figure 4 , Figure 5 As shown, the transition surface 8 is an inclined surface, and the positioning hole 10 is provided with a conical surface 51 that cooperates with the transition surface 8.

[0041] Specifically, the transition surface 8 at the outer end of the positioning post 7 is machined into an inclined surface, and the angle between the inclined surface and the axis of the positioning post 7 is set to 30° - 45° to ensure that it has both guiding function and sufficient structural strength; on the inner wall of the positioning hole 10 of the rotating sleeve 22, a conical surface 51 adapted to the transition surface 8 is machined, the inclination angle of the conical surface 51 is consistent with that of the transition surface 8, and the depth of the conical surface 51 is slightly greater than the protruding length of the outer end of the positioning post 7.

[0042] When the user rotates the air outlet duct 3, the conical surface 51 of the positioning hole 10 contacts the transition surface 8 of the positioning post 7. Since the two have the same tilt angle, the force exerted by the conical surface 51 on the transition surface 8 can be decomposed into axial (compressing spring 9) and circumferential (pushing the positioning post 7 to slide) components, making the positioning post 7 exit the current positioning hole 10 more smoothly. When switching to the next positioning hole 10, the transition surface 8 contacts the conical surface 51 of the new positioning hole 10. The elastic force of the spring 9 guides the positioning post 7 to quickly and accurately embed into the positioning hole 10 through the cooperation of the transition surface 8 and the conical surface 51, while generating clear positioning feedback.

[0043] Furthermore, a spring fixing hole 61 is provided at the inner end of the positioning post 7, one end of the spring 9 is provided in the spring fixing hole 61, a limiting protrusion 71 is provided on the bottom wall of the concave hole 6, and the other end of the spring 9 is engaged with the limiting protrusion 71.

[0044] Spring 9 achieves bidirectional positioning through spring fixing hole 61 and limiting protrusion 71, with radial displacement restricted at both ends; when positioning post 7 is squeezed by external force, spring 9 is compressed along the axial direction of limiting protrusion 71 and spring fixing hole 61, preventing spring 9 from tilting or twisting; during reset, the elastic force of spring 9 is transmitted along the axial direction, pushing positioning post 7 to accurately embed into positioning hole 10; at the same time, limiting protrusion 71 can limit the maximum compression of spring 9, preventing spring 9 from being permanently deformed due to excessive compression.

[0045] Furthermore, the positioning post 7 is made of metal or plastic; the metal positioning post 7 improves structural durability and extends product lifespan; the plastic positioning post 7 reduces frictional resistance and component weight, optimizes the operating feel, and achieves a balance between performance and user experience.

[0046] Furthermore, the outer wall of the rotating sleeve 22 is provided with multiple anti-cavity recessed annular grooves 91.

[0047] The recessed annular groove 91 on the outer wall of the rotating sleeve 22 serves two main purposes: first, it reduces the contact area between the rotating sleeve 22 and the inner wall of the annular groove 23. According to the principle of friction mechanics, reducing the contact area can directly reduce the frictional resistance during rotation, making the rotation of the rotating sleeve 22 more agile; second, it reduces the weight of the rotating sleeve 22. Especially for rotating sleeves made of plastic, the recessed annular groove can reduce the amount of material used, reduce rotational inertia, and further improve rotational flexibility.

[0048] Based on the accompanying drawings and the foregoing display and description of the basic principles, main features, and advantages of this utility model, those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary positioning structure for the air outlet duct of a bladeless fan, characterized in that: It includes a split pipe (2) connected to the air duct of a bladeless fan, and the split pipe (2) is rotatably connected to an air outlet pipe (3). The split pipe (2) includes a connecting pipe port (4). The air outlet pipe (3) is provided with an insertion part (5) rotatably installed on the connecting pipe port (4). A concave hole (6) is provided on the inner wall of the connecting pipe port (4). A positioning post (7) is provided in the concave hole (6). A transition surface (8) is provided at the outer corner of the positioning post (7). A spring (9) is provided between the inner end of the positioning post (7) and the bottom wall of the concave hole (6). Several positioning holes (10) are provided along the circumference on the outer wall of the insertion part (5). The outer end of the positioning post (7) abuts against the positioning hole (10) under the action of the spring (9).

2. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 1, characterized in that: The insertion tube (5) includes an insertion tube (21) and a rotating sleeve (22). The insertion tube (21) is fixedly connected to the air outlet pipe (3). The inner wall of the connecting pipe port (4) is provided with an annular groove (23). The rotating sleeve (22) is rotatably disposed in the annular groove (23). When the insertion tube (21) is inserted into the connecting pipe port (4), it is snapped together with the rotating sleeve (22). The concave hole (6) is provided on the annular groove (23), and the positioning hole (10) is provided on the rotating sleeve (22).

3. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 2, characterized in that: A hook (31) is provided on the rotating sleeve (22), and a groove (32) that cooperates with the hook (31) is provided on the outer wall of the insertion tube (21).

4. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 2, characterized in that: A guide flange (41) is provided on the inner wall of the rotating sleeve (22), and a guide groove (42) that mates with the guide flange (41) is provided on the outer wall of the insertion tube (21).

5. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 1, characterized in that: The transition surface (8) is an inclined surface, and the positioning hole (10) is provided with a conical surface (51) that cooperates with the transition surface (8).

6. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 1, characterized in that: A spring fixing hole (61) is provided at the inner end of the positioning post (7), and one end of the spring (9) is located in the spring fixing hole (61).

7. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 6, characterized in that: A limiting protrusion (71) is provided on the bottom wall of the recess (6), and the other end of the spring (9) is engaged on the limiting protrusion (71).

8. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 1, characterized in that: The positioning post (7) is made of metal or plastic.

9. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 2, characterized in that: The outer wall of the rotating sleeve (22) is provided with multiple anti-cavity concave annular grooves (91).

10. The rotary positioning structure for the air outlet duct of a bladeless fan according to claim 1, characterized in that: The diversion pipe (2) includes an air inlet (92) that communicates with the bladeless fan duct and two connecting pipes (4). The two connecting pipes (4) are arranged on the left and right sides, and an air outlet pipe (3) is connected to each of the two connecting pipes (4).

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