Height adjustment device and circulating fan

Abstract

The application relates to a height adjusting device and a circulating fan, the height adjusting device comprising a support pipe, a lifting pipe slidingly sleeved on the support pipe, a locking mechanism comprising a pressing piece elastically mounted on the lifting pipe and a lock tongue assembly mounted on the support pipe, the lock tongue assembly having a locking state capable of locking the lifting pipe on the support pipe and an unlocking state capable of releasing the lifting pipe, wherein the pressing piece can be pressed to switch the lock tongue assembly from the locking state to the unlocking state, and the pressing piece can be elastically reset to switch the lock tongue assembly from the unlocking state to the locking state. The height adjusting device of the application can conveniently adjust the height of the circulating fan, is convenient to operate and use, has good appearance integrity, and improves the use experience of users.

Description

Technical Field

[0001] This application relates to the field of air conditioning fan technology, and in particular to a height adjustment device and a circulating fan. Background Technology

[0002] Currently, most circulating fans on the market use a bolt and telescopic rod mechanism to achieve height adjustment. Adjusting the height of the circulating fan requires manually loosening or tightening the bolts to unlock or lock the telescopic rod, which is time-consuming and laborious, impacting the user experience. Furthermore, in this bolt-and-telescopic rod mechanism, the bolts are exposed, creating an obtrusive shape and affecting the overall aesthetics of the circulating fan. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application provides a height adjustment device and a circulating fan, which can conveniently adjust the height of the circulating fan, is easy to operate and use, has a good integrated appearance, and improves the user experience.

[0004] In a first aspect, this application provides a height adjustment device, comprising:

[0005] Support tube;

[0006] The lifting tube is slidably sleeved on the support tube;

[0007] The locking mechanism includes a pressing member elastically mounted on the lifting tube and a locking tongue assembly mounted on the support tube, the locking tongue assembly having a locked state capable of locking the lifting tube on the support tube and an unlocked state capable of releasing the lifting tube.

[0008] The pressing member can be pressed to switch the latch assembly from the locked state to the unlocked state, and the pressing member can be elastically reset to switch the latch assembly from the unlocked state to the locked state.

[0009] The height adjustment device according to the first aspect of this application has at least the following beneficial effects:

[0010] The height adjustment device of this application, through the coordinated arrangement of support tube, lifting tube, pressing part and locking tongue assembly, allows users to adjust the height of the air blowing component of the circulating fan by simply pressing the pressing part. It is simple to operate and convenient to use, thus improving the user experience.

[0011] Furthermore, by sliding the support tube and the lifting tube together, and installing the pressing part and the locking tongue assembly on the lifting tube and the support tube respectively, the overall appearance of the height adjustment device can be avoided from being abrupt, thus improving the appearance of the height adjustment device and further enhancing the user experience.

[0012] In some embodiments, the latch assembly includes a latch block movably disposed within the support tube, the inner wall of the support tube having a plurality of locking grooves axially formed therein, the pressing member being capable of locking the latch block in the locking grooves or unlocking the latch block, and the lifting tube being configured to drive the latch block to slide into different locking grooves when the pressing member unlocks the latch block.

[0013] In some embodiments, the latch assembly further includes a limiting seat fixedly installed in the lifting tube, the latch block being slidably installed radially on the limiting seat, and the latch block extending into the locking groove and engaging with the inclined surface of the locking groove.

[0014] In some embodiments, the limiting seat has a through hole in the radial direction for the locking tongue block to slide, and the limiting seat has a relief cavity in the axial direction for avoiding the locking tongue block. The pressing member has a blocking block for blocking or disengaging from the locking tongue block. The blocking block is located in the relief cavity and is radially aligned with the through hole. A first elastic reset member is also provided between the limiting seat and the locking tongue block, and a second elastic reset member is provided between the pressing member and the limiting seat.

[0015] In some embodiments, the pressing member is slidably inserted into the limiting seat, and a travel groove is formed between the pressing member and the limiting seat, and the second elastic reset member is sleeved on the pressing member and located in the travel groove.

[0016] In some embodiments, the limiting seat is further provided with a first stop portion, and the pressing member is provided with a first positioning portion that cooperates with the first stop portion.

[0017] In some embodiments, the inner wall of the support tube extends axially with a limiting rib, the limiting seat passes through the support tube, and the outer wall of the limiting seat abuts against the limiting rib.

[0018] In some embodiments, the bottom inner wall of the lifting tube is provided with a second stop portion, and the top outer wall of the support tube is provided with a second positioning portion for stopping and engaging with the second stop portion.

[0019] In some embodiments, the outer wall of the support tube is further provided with a damping block, and a portion of the inner wall of the lifting tube abuts against the damping block.

[0020] Secondly, embodiments of this application provide a circulating fan, including:

[0021] Base;

[0022] The height adjustment device described above, wherein the support tube is detachably mounted to the base; and

[0023] The blower assembly is detachably mounted on the lifting tube.

[0024] The circulating fan according to the second aspect of this application has at least the following beneficial effects:

[0025] The circulating fan of this application, due to the presence of the aforementioned height adjustment device, also possesses the same technical effect brought by the aforementioned height adjustment device. That is, through the coordinated arrangement of the support tube, the lifting tube, the pressing part, and the locking tongue assembly, the user can adjust the height of the air blowing component of the circulating fan by simply pressing the pressing part. The operation is simple and convenient, improving the user experience.

[0026] Furthermore, by sliding the support tube and the lifting tube together, and installing the pressing part and the locking tongue assembly on the lifting tube and the support tube respectively, the overall appearance of the height adjustment device can be avoided from being abrupt, improving the appearance of the circulation fan and further enhancing the user experience.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the circulating fan in an embodiment of this application.

[0030] Figure 2 This is an exploded view of the height adjustment device according to an embodiment of this application.

[0031] Figure 3 A cross-sectional view of the height adjustment device according to an embodiment of this application. Figure 1 .

[0032] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0033] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0034] Figure 6 A cross-sectional view of the height adjustment device according to an embodiment of this application. Figure 2.

[0035] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point C.

[0036] Figure 8 A cross-sectional view of the height adjustment device according to an embodiment of this application. Figure 3 .

[0037] Figure 9 for Figure 8 A magnified schematic diagram of the structure at point D.

[0038] Figure 10 A cross-sectional view of the height adjustment device according to an embodiment of this application. Figure 4 .

[0039] Figure 11 This is a partial structural diagram of the support tube according to an embodiment of this application.

[0040] Explanation of reference numerals in the attached drawings: Support tube 100; Locking groove 110; Protruding rib 111; Limiting rib 120; Second positioning part 130; Damping block 140; Lifting tube 200; Second stop part 210; Pressing part 300; Stopping block 310; Second elastic reset part 320; Stroke groove 330; First positioning part 340; Locking tongue assembly 400; Locking tongue block 410; Limiting seat 420; Through hole 421; Clearance cavity 422; First stop part 423; Mounting groove 424; First elastic reset part 430; Base 500; Blowing assembly 600. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figure 1 and Figure 2 This application provides a height adjustment device and a circulating fan. The circulating fan is equipped with the height adjustment device to achieve height adjustment of the circulating fan.

[0048] The height adjustment device includes a support tube 100, a lifting tube 200, and a locking mechanism.

[0049] The lifting tube 200 is slidably sleeved on the support tube 100. The locking mechanism includes a pressing member 300 elastically installed on the lifting tube 200 and a locking tongue assembly 400 installed on the support tube 100. The locking tongue assembly 400 has a locked state that can lock the lifting tube 200 on the support tube 100 and an unlocked state that can release the lifting tube 200.

[0050] The pressing member 300 can be pressed to switch the latch assembly 400 from the locked state to the unlocked state, and the pressing member 300 can be elastically reset to switch the latch assembly 400 from the unlocked state to the locked state.

[0051] It is understood that both the support tube 100 and the lifting tube 200 are constructed as hollow tubular structures. The support tube 100 can be, but is not limited to, a round tube, a square tube, or other tubular structures; similarly, the lifting tube 200 can be, but is not limited to, a round tube, a square tube, or other tubular structures. Furthermore, the inner diameter of the lifting tube 200 is larger than that of the support tube 100, allowing the lifting tube 200 to be accurately fitted onto the support tube 100. Additionally, the pressing member 300 can be elastically inserted into the lifting tube 200 along its axial direction. The top of the pressing member 300 is the pressing end face, which remains flush with the top surface of the lifting tube 200 in the initial state (when not subjected to external pressure). This avoids an abrupt shape and structure of the pressing member 300, improving the overall aesthetic integrity of the height adjustment device.

[0052] It is easy to understand that when the circulation fan is equipped with the height adjustment device of this application embodiment, the air blowing assembly 600 (fan structure) of the circulation fan can be installed on the top or side wall of the lifting pipe 200. When the lifting pipe 200 slides up and down relative to the support pipe 100, the air blowing assembly 600 will rise and fall synchronously with the lifting pipe 200, thereby adjusting the height of the air blowing assembly 600.

[0053] When the pressing member 300 is in the initial state, the locking tongue assembly 400 is in the locked state of locking the lifting tube 200, that is, the lifting tube 200 is locked at this time and cannot slide up or down relative to the support tube 100.

[0054] When the user needs to adjust the height of the air blowing assembly 600 of the circulation fan, they can press the press 300, which will switch the locking tongue assembly 400 from the locked state to the unlocked state. At this time, the locking tongue assembly 400 will release the lifting tube 200, meaning the lifting tube 200 is in the unlocked state. The user can then freely push the lifting tube 200 to slide relative to the support tube 100. When the lifting tube 200 has slid to the predetermined position, the user can release the press 300, causing the press 300 to elastically reset and switch the locking tongue assembly 400 from the unlocked state to the locked state. This will lock the lifting tube 200 again, thus fixing it in place. In this way, the height of the air blowing assembly 600 of the circulation fan can be quickly adjusted.

[0055] It is understood that the height adjustment device in this embodiment of the application is configured with the support tube 100, the lifting tube 200, the pressing member 300 and the locking tongue assembly 400. Users can adjust the height of the air blowing assembly 600 of the circulating fan by simply pressing the pressing member 300. The operation is simple and convenient, which improves the user experience.

[0056] Furthermore, by slidingly fitting the support tube 100 and the lifting tube 200 together, and installing the pressing part 300 and the locking tongue assembly 400 on the lifting tube 200 and the support tube 100 respectively, the overall appearance of the height adjustment device can be avoided from being abrupt, thus improving the appearance integration of the height adjustment device and further enhancing the user experience.

[0057] In some embodiments of this application, see Figure 2 and Figure 3 The latch assembly 400 includes a latch block 410 movably disposed within the support tube 100. The inner wall of the support tube 100 is provided with a plurality of locking grooves 110 along the axial direction. The pressing member 300 can lock the latch block 410 into the locking groove 110 or release the locking of the latch block 410. The lifting tube 200 is configured to drive the latch block 410 to slide into different locking grooves 110 when the pressing member 300 releases the locking of the latch block 410.

[0058] It should be noted that the locking tongue block 410 is directly or indirectly connected to the lifting tube 200. That is, when the lifting tube 200 slides up and down relative to the support tube 100, the locking tongue block 410 moves up and down synchronously with the lifting tube 200.

[0059] It is not difficult to understand, see Figure 3 and Figure 4 When the pressing member 300 is in the initial state without external force, the pressing member 300 locks the locking tongue block 410 in the locking groove 110, that is, at this time the locking tongue assembly 400 is in the locked state of locking the lifting tube 200.

[0060] See Figure 6 and Figure 7 When the user presses the pressing part 300, the pressing part 300 releases the locking of the locking tongue block 410. At this time, the locking tongue assembly 400 is in the unlocked state of releasing the lifting tube 200. The user can then freely push the lifting tube 200 so that the lifting tube 200 moves up and down relative to the support tube 100. During the process, the lifting tube 200 also drives the locking tongue block 410 to slide into different locking slots 110.

[0061] Furthermore, it should be noted that during the lifting and sliding process of the lifting tube 200 relative to the support tube 100, since the pressing member 300 is installed on the lifting tube 200, the pressing member 300 will rise and fall synchronously with the lifting tube 200. In this way, the lifting tube 200, the pressing member 300, and the locking tongue block 410 perform synchronous lifting and lowering actions, which reduces the sliding distance of the pressing member 300 while ensuring that the pressing member 300 can quickly and elastically return to the state of locking the locking tongue block 410 in the corresponding locking groove 110, thereby improving the convenience of operation.

[0062] See Figure 8 and Figure 9 When the lifting tube 200 slides the locking tongue block 410 into the predetermined locking groove 110, the user can release the pressing member 300, so that the pressing member 300 elastically returns to the initial state. At this time, the pressing member 300 locks the locking tongue block 410 into the corresponding locking groove 110 again, so that the lifting tube 200 is locked again and cannot continue to move up and down. In this way, a height adjustment action is completed.

[0063] It is understood that this application provides a plurality of locking grooves 110 axially opened on the inner wall of the support tube 100, and a locking tongue block 410 that can be inserted into the locking grooves 110 is movably arranged in the support tube 100. By using the insertion and positioning of the locking tongue block 410 with different locking grooves 110 in the axial direction, and at the same time, when the pressing member 300 releases the locking of the locking tongue block 410, the lifting tube 200 can drive the locking tongue block 410 to slide into different locking grooves 110, so as to achieve the effect of stepless adjustment of the height of the lifting tube 200 by simply pressing the pressing member 300, thereby further improving the convenience of adjusting the height of the air blowing assembly 600 of the circulating fan.

[0064] In some embodiments of this application, see also 3 and Figure 4The locking tongue assembly 400 also includes a limiting seat 420 fixedly installed in the lifting tube 200, and a locking tongue block 410 is slidably installed in the limiting seat 420 along the radial direction. The locking tongue block 410 extends into the locking groove 110 and cooperates with the inclined surface of the locking groove 110.

[0065] Specifically, the limiting seat 420 is roughly tubular in shape. It is inserted into the lifting tube 200 and threadedly connected to it. Simultaneously, the bottom end of the limiting seat 420 extends into the support tube 100. It can be understood that when the lifting tube 200 slides up and down relative to the support tube 100, the limiting seat 420 moves up and down synchronously within the cavity of the support tube 100.

[0066] The limiting seat 420 is provided with a mounting groove 424 along the radial direction for slidingly mounting the locking tongue block 410. The locking tongue block 410 is slidably mounted in the mounting groove 424 to prevent the locking tongue block 410 from falling off the limiting seat 420 during the radial sliding process.

[0067] The locking tongue block 410 has a first inclined surface and a second inclined surface that are relatively distributed along the axial direction. Correspondingly, the two inner walls of the locking groove 110 that are relatively opposite to each other in the axial direction are respectively constructed as a third inclined surface and a fourth inclined surface. The first inclined surface and the third inclined surface are in sliding fit with each other, and the second inclined surface and the fourth inclined surface are in sliding fit with each other.

[0068] When the lifting tube 200 is unlocked and slides up and down relative to the support tube 100, the lifting tube 200 will drive the limiting seat 420 to move up and down along the cavity of the support tube 100. This will drive the locking tongue block 410 to slide along the inclined surface of the locking groove 110 through the limiting seat 420, so that the locking tongue block 410 slides axially from one locking groove 110 to another locking groove 110, and is then locked in the corresponding locking groove 110 by the elastically reset pressing member 300. In this way, the height of the lifting tube 200 can be adjusted, achieving the effect of stepless adjustment of the air blowing component 600 of the circulating fan.

[0069] It is easy to understand that the limiting seat 420 facilitates the installation and limiting of the locking tongue block 410, ensuring that the locking tongue block 410 can accurately cooperate with the locking groove 110 and the pressing member 300, while preventing the locking tongue block 410 from disengaging during the lifting and sliding of the lifting tube 200, thus improving the stability and safety of the height adjustment operation. The inclined surface cooperation between the locking tongue block 410 and the locking groove 110 facilitates the sliding of the locking tongue block 410 into different locking grooves 110, improving the smoothness of the movement of the lifting tube 200 and the locking tongue block 410, further enhancing the stability and safety of the height adjustment operation.

[0070] Further, see Figure 3 and Figure 4The limiting seat 420 has a through hole 421 in the radial direction for sliding of the locking tongue block 410, and the limiting seat 420 has a relief cavity 422 in the axial direction for avoiding the locking tongue block 410. The pressing member 300 has a blocking block 310 for blocking or disengaging from the locking tongue block 410. The blocking block 310 is located in the relief cavity 422 and is radially aligned with the through hole 421. A first elastic reset member 430 is also provided between the limiting seat 420 and the locking tongue block 410, and a second elastic reset member 320 is provided between the pressing member 300 and the limiting seat 420.

[0071] Specifically, the two inner walls of the support tube 100 are provided with a plurality of protruding ribs 111 spaced apart along the axial direction. All the protruding ribs 111 protrude radially along the support tube 100. Along the axial direction, a locking groove 110 is formed between two adjacent protruding ribs 111. It can be understood that the opening of the locking groove 110 is set radially along the support tube 100. The upper and lower end faces of the protruding ribs 111 are the third inclined surface and the fourth inclined surface.

[0072] Correspondingly, the limiting seat 420 has mounting grooves 424 on both opposite sides, with the two mounting grooves 424 facing each other radially. Two locking tongue blocks 410 are slidably mounted within the two mounting grooves 424 respectively. A through hole 421 is located at one end of the mounting groove 424 near the central axis of the support tube 100, and the end of the mounting groove 424 away from the central axis of the support tube 100 communicates with the locking groove 110. Furthermore, the clearance cavity 422 communicates with the mounting groove 424 through the through hole 421. Additionally, both the first elastic reset member 430 and the second elastic reset member 320 are springs. The first elastic reset member 430 provides elastic buffering and elastic reset force for the radial sliding of the locking tongue block 410, and the second elastic reset member 320 provides elastic buffering and elastic reset force for the movement of the pressing member 300.

[0073] See also Figure 3 and Figure 4 When the pressing member 300 is in the initial state without external force, the two end faces of the abutment block 310 on the pressing member 300 abut against the two locking tongue blocks 410 at the positions of the two through holes 421, so that the two locking tongue blocks 410 are respectively locked in the corresponding locking grooves 110 in the radial direction, thereby making the lifting tube 200 locked and unable to slide relative to the support tube 100.

[0074] When the user presses the pressing member 300 downwards along the axial direction, the second elastic reset member 320 is compressed. The pressing member 300 moves downwards along the axial direction relative to the lifting tube 200 and the support tube 100. Simultaneously, the abutment block 310 on the pressing member 300 moves along the clearance cavity 422, releasing its abutment against the locking tongue block 410. At this time, the locking tongue block 410 gains the freedom to move in both the axial and radial directions, and the lifting tube 200 is unlocked. See also Figure 6 and Figure 7When the user pushes the lifting tube 200 to slide up and down relative to the support tube 100, the lifting tube 200 will drive the limiting seat 420 to move up and down along the cavity of the support tube 100, thereby driving the locking tongue block 410 to slide along the inclined surface of the locking groove 110 through the limiting seat 420. The first elastic reset member 430 is compressed, improving the smoothness of the sliding of the locking tongue block 410.

[0075] It is easy to understand that when the lifting tube 200 drives the limiting seat 420 to rise and slide, the movement of the locking tongue block 410 is a composite movement consisting of sliding radially relative to the limiting seat 420 and sliding axially relative to the support tube 100. The through hole 421 and the relief cavity 422 provide guidance and relief for the locking tongue block 410 to slide radially relative to the limiting seat 420, ensuring that the locking tongue block 410 can be accurately and smoothly slid into the predetermined locking groove 110 under the drive of the lifting tube 200.

[0076] It is understandable that when the lifting tube 200 drives the locking tongue block 410 to move through the limiting seat 420, the pressing member 300 is always in a state of being elastically pressed, so as to ensure that the blocking block 310 on the pressing member 300 remains detached from the locking tongue block 410.

[0077] See Figure 8 and Figure 9 When the user releases the pressing member 300, the pressing member 300 is reset to its initial state by the action of the second elastic reset member 320. This causes the stop block 310 on the pressing member 300 to move and reset along the clearance cavity 422 to a position radially aligned with the through hole 421. The locking tongue block 410 is then radially locked into the corresponding locking groove 110, thus locking the lifting tube 200 and preventing it from sliding relative to the support tube 100. In this way, one height adjustment action is completed.

[0078] It is easy to understand that, in this embodiment of the application, the limiting seat 420 has a through hole 421 in the radial direction and a relief cavity 422 in the axial direction. The through hole 421 provides guidance for the radial sliding of the locking tongue block 410, and the relief cavity 422 provides relief for the locking tongue block 410 to disengage from the locking groove 110 in the radial direction. The first elastic reset member 430 provides elastic buffering and reset force for the radial movement of the locking tongue block 410, and the second elastic reset member 320 provides elastic buffering and reset force for the pressing member 300. The various structures work together to effectively improve the smoothness and accuracy of the movement of the locking tongue block 410, so that the lifting tube 200 can be adjusted to any position on the support tube 100, thereby accurately achieving the effect of stepless adjustment of the blowing assembly 600 of the circulating fan.

[0079] See Figure 3 and Figure 5In some embodiments of this application, the pressing member 300 is slidably inserted into the limiting seat 420, and a travel groove 330 is formed between the pressing member 300 and the limiting seat 420. The second elastic reset member 320 is sleeved on the pressing member 300 and is located in the travel groove 330.

[0080] Specifically, the pressing member 300 is roughly rod-shaped and is slidably inserted into the limiting seat 420 along the axial direction. The top end of the pressing member 300 and the limiting seat 420 are respectively provided with stepped surfaces. The upper and lower ends of the second elastic reset member 320 abut against the stepped surfaces of the pressing member 300 and the limiting seat 420, respectively, to achieve the limiting assembly of the second elastic reset member 320.

[0081] It is easy to understand that the stroke groove 330 formed between the pressing member 300 and the limiting seat 420 limits the pressing stroke of the pressing member 300, that is, limits the amount of deformation of the second elastic reset member 320 under compression. In this way, it is convenient for the user to perceive that the stop block 310 on the pressing member 300 has accurately disengaged from the stop block 410 of the locking tongue block. This reduces or even eliminates the risk of structural damage to the locking tongue block 410 and the lifting tube 200 caused by the user forcibly pushing the lifting tube 200 after the stop block 310 on the pressing member 300 has not completely disengaged from the stop block 410 of the locking tongue block. This further improves the stability and safety of the height adjustment action.

[0082] In some embodiments of this application, see Figure 10 The limiting seat 420 is also provided with a first stop part 423, and the pressing member 300 is provided with a first positioning part 340 that cooperates with the first stop part 423.

[0083] Specifically, the first stop portion 423 is configured as a stop plane, and the first positioning portion 340 is configured as a limiting plane that fits and cooperates with the stop plane.

[0084] Understandably, the stop portion 423 of the limiting seat 420 and the stop portion 340 of the pressing member 300 provide positioning guidance for the mating assembly of the pressing member 300 and the limiting seat 420. Simultaneously, when the pressing member 300 elastically returns to its initial state, the first stop portion 423 limits the pressing member 300 by stopping the first stop portion 340, preventing the pressing member 300 from detaching from the lifting tube 200 due to a large elastic return force, thus improving the movement stability and safety of the pressing member 300.

[0085] It should be noted that during the long-term axial lifting and lowering process, the limit seat 420 may move radially outward, causing the limit seat 420 to detach from the pressing part 300. This may also cause the entire latch assembly 400 to become loose, resulting in the failure of the latch assembly 400.

[0086] Based on this, in some embodiments of this application, see [reference] Figure 2 and Figure 11 The inner wall of the support tube 100 extends axially with a limiting rib 120, and the limiting seat 420 passes through the support tube 100, with the outer wall of the limiting seat 420 abutting against the limiting rib 120.

[0087] By providing a limiting rib 120 extending axially along the inner wall of the support tube 100 to abut against the outer wall of the limiting seat 420, the lateral abutment action of the limiting rib 120 against the limiting seat 420 can provide radially inward abutment pressure to the limiting seat 420, effectively reducing the probability of the limiting seat 420 moving radially outward, improving the assembly and movement stability of the limiting seat 420, and thus improving the overall assembly and movement stability of the locking tongue assembly 400, thereby improving the overall structural and functional stability of the height adjustment device.

[0088] In some embodiments of this application, see 3. Figure 9 and Figure 11 The bottom inner wall of the lifting tube 200 is provided with a second stop 210, and the top outer wall of the support tube 100 is provided with a second positioning part 130 for cooperating with the second stop 210.

[0089] Specifically, the second stop portion 210 is constructed as an annular block, and the second positioning portion 130 is an annular surface that protrudes radially from the top outer wall of the support tube 100.

[0090] It is easy to understand that when the lifting tube 200 moves upward relative to the support tube 100 to the top of the support tube 100, the second stop 210 of the lifting tube 200 is stopped and limited by the second positioning part 130. In this way, the maximum lifting stroke of the lifting tube 200 is effectively limited, preventing the lifting tube 200 from completely detaching from the support tube 100 and improving the safety of the height adjustment operation.

[0091] In some embodiments of this application, see Figure 2 and Figure 3 The outer wall of the support tube 100 is also provided with a damping block 140, and part of the inner wall of the lifting tube 200 abuts against the damping block 140.

[0092] Specifically, damping blocks 140 are distributed in a ring on the outer wall of the top of the support tube 100, and the damping blocks 140 are fixed to the outer wall of the support tube 100 by interference fitting.

[0093] In this way, the lifting tube 200 can always have a portion of its inner wall in contact with the damping block 140. When the user presses the pressing part 300 but does not stably support the lifting tube 200, due to the frictional resistance of the damping block 140 on the lifting tube 200, the lifting tube 200 will not slide relative to the support tube 100 due to the large weight of the blower assembly 600 on it. The user needs to apply a pushing force to the lifting tube 200 to make the lifting tube 200 slide along the support tube 100. This improves the safety of the height adjustment operation, which in turn improves the overall safety of the height adjustment device.

[0094] Additionally, see Figure 1 This application embodiment also provides a circulating fan, which includes a base 500, a blowing assembly 600, and the aforementioned height adjustment device.

[0095] The support tube 100 is detachably mounted on the base 500, and the blower assembly 600 is detachably mounted on the lifting tube 200.

[0096] Specifically, the support tube 100 can be mounted on the base 500 with screws or bolts for easy assembly and disassembly. Similarly, the blower assembly 600 can be mounted on the riser tube 200 with screws, bolts, and retaining rings for easy assembly and disassembly. It can be understood that the blower assembly 600 is the fan or blower component of the circulating fan.

[0097] Obviously, the circulating fan of this application, due to the configuration of the aforementioned height adjustment device, also possesses the same technical effect brought by the aforementioned height adjustment device. That is, through the coordinated arrangement of the support tube 100, the lifting tube 200, the pressing part 300, and the locking tongue assembly 400, the user can adjust the height of the air blowing component 600 of the circulating fan by simply pressing the pressing part 300. The operation is simple and convenient, improving the user experience.

[0098] Furthermore, by slidingly fitting the support tube 100 and the lifting tube 200 together, and installing the pressing part 300 and the locking tongue assembly 400 on the lifting tube 200 and the support tube 100 respectively, the overall appearance of the height adjustment device can be avoided from being abrupt, improving the appearance of the circulating fan and further enhancing the user experience.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A height adjustment device, characterized in that include: Support tube (100); The lifting tube (200) is slidably sleeved on the support tube (100). The locking mechanism includes a pressing member (300) elastically mounted on the lifting tube (200) and a locking tongue assembly (400) mounted on the support tube (100), the locking tongue assembly (400) having a locked state capable of locking the lifting tube (200) on the support tube (100) and an unlocked state capable of releasing the lifting tube (200); The pressing member (300) can be pressed to switch the latch assembly (400) from the locked state to the unlocked state, and the pressing member (300) can be elastically reset to switch the latch assembly (400) from the unlocked state to the locked state. The latch assembly (400) includes a latch block (410) movably disposed within the support tube (100). The inner wall of the support tube (100) is provided with a plurality of locking grooves (110) along the axial direction. The lifting tube (200) is configured to drive the latch block (410) to slide into different locking grooves (110) when the pressing member (300) releases the locking of the latch block (410). The latch assembly (400) further includes a limiting seat (420) fixedly installed in the lifting tube (200), the latch block (410) is slidably installed in the limiting seat (420) in the radial direction, and the latch block (410) extends into the locking groove (110) and cooperates with the inclined surface of the locking groove (110); The limiting seat (420) has a through hole (421) in the radial direction for the sliding of the locking tongue block (410), and the limiting seat (420) has a relief cavity (422) in the axial direction for avoiding the locking tongue block (410). The pressing member (300) has a blocking block (310) for blocking or disengaging from the locking tongue block (410). The blocking block (310) is located in the relief cavity (422) and is radially aligned with the through hole (421). A first elastic reset member (430) is also provided between the limiting seat (420) and the locking tongue block (410), and a second elastic reset member (320) is provided between the pressing member (300) and the limiting seat (420). When the pressing member (300) is in its initial state without external force, the end face of the abutment block (310) abuts against the locking tongue block (410) at the position of the through hole (421), so that the locking tongue block (410) is radially locked in the corresponding locking groove (110); when the pressing member (300) is pressed, the pressing member (300) moves downward relative to the lifting tube (200) and the support tube (100) in the axial direction, and the abutment block (310) moves along the relief cavity (422) to release the abutment against the locking tongue block (410); and, during the process of the lifting tube (200) driving the locking tongue block (410) to move through the limiting seat (420), the pressing member (300) is in a state of being elastically pressed.

2. The height adjustment device of claim 1, wherein, The pressing member (300) is slidably inserted into the limiting seat (420), and a stroke groove (330) is formed between the pressing member (300) and the limiting seat (420). The second elastic reset member (320) is sleeved on the pressing member (300) and is located in the stroke groove (330).

3. Height adjustment device according to claim 1 or 2, characterized in that The limiting seat (420) is also provided with a first stop (423), and the pressing member (300) is provided with a first positioning part (340) that cooperates with the first stop (423).

4. The height adjustment device of claim 1, wherein, The inner wall of the support tube (100) extends axially with a limiting rib (120), the limiting seat (420) passes through the support tube (100), and the outer wall of the limiting seat (420) abuts against the limiting rib (120).

5. The height adjustment device of claim 1, wherein, The limiting seat (420) is inserted into the lifting tube (200) and is threadedly connected and fixed to the lifting tube (200).

6. The height adjustment device of claim 1, wherein, The bottom end of the limiting seat (420) also extends into the support tube (100).

7. The height adjustment device of claim 1, wherein, The limiting seat (420) is provided with a mounting groove (424) along the radial direction for slidingly mounting the locking tongue block (410), and the locking tongue block (410) is slidably mounted in the mounting groove (424).

8. The height adjustment device of claim 1, wherein, The bottom inner wall of the lifting tube (200) is provided with a second stop (210), and the top outer wall of the support tube (100) is provided with a second positioning part (130) for stopping and cooperating with the second stop (210).

9. The height adjustment device according to claim 1, characterized in that, The outer wall of the support tube (100) is also provided with a damping block (140), and part of the inner wall of the lifting tube (200) abuts against the damping block (140).

10. A circulating fan, characterized in that, include: Base (500); The height adjustment device as described in any one of claims 1 to 9, wherein the support tube (100) is detachably mounted to the base (500); and The blower assembly (600) is detachably mounted on the riser tube (200).

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