Height-adjustable circulating fan

Abstract

The utility model discloses a circulating fan with adjustable height, which comprises a base, a fan head assembly and a stand column for connecting the fan head assembly and the base, the stand column comprises an upper sleeve, a lower sleeve and a connecting sleeve, the upper sleeve and the lower sleeve are connected with the fan head assembly, the connecting sleeve is movably connected between the upper sleeve and the lower sleeve, and a fixing piece is fixedly connected in the connecting sleeve. An elastic arm is formed on the fixing part, a rotation stopping groove is formed in the elastic arm, a mounting plate is arranged in the rotation stopping groove, a control part penetrating through the mounting plate and extending out of the connecting sleeve is arranged on the connecting sleeve, and the control part is matched with the mounting plate to drive the elastic arm to be close to and abut against the lower sleeve, or the control part is far away from and releases the elastic arm. The connecting sleeve is allowed to slide relative to the lower sleeve. Under the condition that an internal circuit does not affect lifting of the stand column, the effect of conveniently and stably adjusting the height is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a height-adjustable circulation fan. Background Art

[0002] Circulation fans are widely used as efficient household appliances for promoting indoor air circulation. They can effectively improve indoor temperature distribution and accelerate air circulation. To adapt to different usage scenarios, circulation fans usually need to have a height adjustment function.

[0003] The support structure of the commonly available adjustable-height circulation fans on the market consists of multiple sections of casing, connected by bolts. After manually pulling the inner casing to the desired height, bolts threaded through the outer casing are tightened against the inner casing to lock it. This method is relatively simple, but the bolts can wear out the inner casing over time, causing it to deform and become unstable.

[0004] In addition, traditional circulation fans usually integrate the main electrical control components into the base. For example, in the invention patent application with prior art publication number CN110374903A, the power cord or signal line on the base passes through the inside of the column to reach the fan head. When adjusting the height, the adjustment action of the column is easily bound, pulled or entangled by the internal cables, resulting in cable failure and causing safety problems. Utility Model Content

[0005] The utility model aims to provide a height-adjustable circulation fan, which has the effect of convenient and stable height adjustment without affecting the lifting of the column by the internal circuit.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: a height-adjustable circulation fan, comprising a base, a fan head assembly, and a column connecting the fan head assembly and the base, the column comprising an upper sleeve and a lower sleeve connected to the fan head assembly, and a connecting sleeve movably connected between the upper sleeve and the lower sleeve, a fixing member fixedly connected to the connecting sleeve, an elastic arm formed on the fixing member, a stop groove formed on the elastic arm, a mounting plate provided in the stop groove, a control member passed through the mounting plate and extending out of the connecting sleeve is provided on the connecting sleeve, the control member cooperates with the mounting plate to drive the elastic arm to approach and press against the lower sleeve, or the control member moves away from and releases the elastic arm to allow the connecting sleeve to slide relative to the lower sleeve.

[0007] By adopting the above technical solution, the connecting sleeve and the lower sleeve are fixedly connected, and convenient and stable height adjustment is achieved; the volume during transportation is reduced, and the transportation cost is reduced.

[0008] The present invention is further configured as follows: a plurality of protrusions are provided on the inner wall of the connecting sleeve, and limiting ribs are provided on the protrusions. The limiting ribs protrude toward the lower sleeve and are mounted on the top wall of the fixing member.

[0009] The present invention is further configured as follows: a limiting groove is provided between two adjacent protrusions; the fixing piece is circumferentially provided with buckles corresponding to the positions of the limiting grooves; the limiting ribs and the limiting grooves jointly constrain the fixing piece to be fixed to the connecting sleeve.

[0010] The present invention is further configured as follows: the fixing piece is circumferentially provided with supporting ribs, and the supporting ribs are interference-fitted with the connecting sleeve.

[0011] By adopting the above technical solution, the connection between the fixing piece and the connecting sleeve is made more stable.

[0012] The present invention is further configured as follows: a support block is provided between the fixing member and the connecting sleeve, and the support block is supported between the inner wall of the connecting sleeve and the anti-rotation groove.

[0013] By adopting the above technical solution and arranging the support block, the mounting plate is fixed between the support block and the elastic arm.

[0014] The utility model is further configured as follows: a butt joint is provided on the lower sleeve, positioning ribs are provided circumferentially on the butt joint, a vertically arranged guide groove is provided on the connecting sleeve, the protrusion is located at the end of the guide groove, and the limiting rib is clamped between the butt joint and the fixing member.

[0015] By adopting the above technical solution, the guiding function of the guide groove and the positioning ribs has an anti-mistake effect, which makes it convenient for the operator to assemble the connecting sleeve and the lower sleeve through the sliding guidance of the guide groove and the positioning ribs.

[0016] The present invention is further configured as follows: an annular groove for accommodating the lower sleeve is provided on the butt joint, and a supporting protrusion is provided on the annular groove, and the supporting protrusion enables the lower sleeve to engage with the annular groove.

[0017] The utility model is further configured as follows: an L-shaped groove is provided on the lower sleeve, a positioning pin corresponding to the position of the L-shaped groove is provided on the docking head, and the docking head has a locked state in which the positioning pin is locked in the L-shaped groove, and a detachable state in which the positioning pin is loosened from the L-shaped groove.

[0018] The present invention is further configured as follows: an electrical component for controlling the fan head assembly is provided in the upper sleeve, and a power line of the electrical component is led out from the upper sleeve.

[0019] By adopting the above technical solution, the wiring inside the column and chassis is prevented from affecting the lifting function of the column, and the layout is more reasonable.

[0020] The present invention is further configured as follows: a docking hole is provided on the upper sleeve, and the circulation fan has a first working state in which the docking head is directly connected to the upper sleeve through the docking hole, and a second working state in which the docking head is indirectly connected to the upper sleeve through the connecting sleeve, and the height of the first working state is different from that of the second working state.

[0021] By adopting the above technical solution, the height can be adjusted by lifting the column in the second working state, and the height can be adjusted by disassembling one section of the column. It can be assembled according to different needs, which is more humane.

[0022] In summary, the present invention has the following beneficial effects:

[0023] 1. The elastic arm, anti-rotation groove, mounting plate on the fixing part and the control part on the connecting sleeve are used to control the control part exposed outside the connecting sleeve, driving the elastic arm to move away from or close to the lower sleeve, thereby avoiding direct contact between the bolt and the lower sleeve, causing long-term wear of the lower sleeve, resulting in easy deformation of the lower sleeve and unstable support, and realizing convenient and stable height adjustment of the connecting sleeve and the lower sleeve.

[0024] 2. The base, fan head assembly, upper sleeve, lower sleeve and connecting sleeve are all configured to be independently detachable, which reduces the volume during transportation and reduces transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view of embodiment 1 of the present utility model.

[0026] Figure 2 It is an exploded view of the first embodiment of the present invention.

[0027] Figure 3 It is a cross-sectional view of embodiment 1 of the present utility model.

[0028] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0029] Figure 5 It is a cross-sectional view of the buckle of the present invention.

[0030] Figure 6 It is a cross-sectional view of the present invention used to reflect the annular groove and the supporting protrusion.

[0031] Figure 7 It is a cross-sectional view of the connecting sleeve of the present utility model.

[0032] Figure 8 It is a cross-sectional view of embodiment 2 of the present utility model.

[0033] Figure 9 yes Figure 8 Enlarged view of point B in the middle.

[0034] In the figure: 1. Base; 2. Fan head assembly; 4. Post; 41. Upper sleeve; 411. Docking hole; 42. Lower sleeve; 421. L-shaped groove; 422. Horizontal extension; 423. Longitudinal extension; 43. Connecting sleeve; 431. Protrusion; 432. Limiting rib; 433. Limiting groove; 434. Guide groove; 5. Fixing member; 51. Elastic arm; 511. Stop groove; 512. Mounting plate; 513. Support block; 514. Contact protrusion; 52. Buckle; 53. Support rib; 6. Control member; 7. Docking joint; 71. Positioning rib; 72. Annular groove; 73. Supporting protrusion; 74. Positioning pin; 75. Protrusion. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] Example 1:

[0037] A height-adjustable circulation fan, such as Figure 1-7As shown, it includes a base 1, a fan head assembly 2, and a column 4 connecting the fan head assembly 2 and the base 1, the column 4 includes an upper sleeve 41 and a lower sleeve 42 connected to the fan head assembly 2, and a connecting sleeve 43 movably connected between the upper sleeve 41 and the lower sleeve 42, the connecting sleeve 43 is fixedly connected with a fixing part 5, the fixing part 5 is formed with an elastic arm 51, the elastic arm 51 is provided with a stop groove 511, the stop groove 511 is provided with a mounting plate 512, the connecting sleeve 43 is provided with a control part 6 that passes through the mounting plate 512 and extends out of the connecting sleeve 43, the control part 6 cooperates with the mounting plate 512 to drive the elastic arm 51 to approach and press against the lower sleeve 42, or the control part 6 moves away from and releases the elastic arm 51 to allow the connecting sleeve 43 to slide relative to the lower sleeve 42. The control part 6 is composed of a knob and a bolt fixed on the knob. The bolt penetrates the connecting sleeve 43 and the mounting plate 512 in the anti-rotation groove 511. The mounting plate 512 is provided with a threaded hole. By rotating the bolt, the threaded hole on the mounting plate 512 cooperates with the lower bolt to penetrate the mounting plate 512 and resist the elastic arm 51. Continuous force is applied to move the elastic arm 51 toward the direction of approaching the lower sleeve 42 until the elastic arm and the lower sleeve 42 are tightly pressed, thereby forming a fixed connection between the connecting sleeve 43 and the lower sleeve 42; when lifting is required, the knob exposed outside the connecting sleeve 43 is rotated to make the bolt leave the mounting plate 512, and the elastic arm 51 is reset away from the lower sleeve 42. At this time, the connecting sleeve 43 is in an active state on the outer wall of the lower sleeve 42. When the connecting sleeve 43 moves to a suitable height, the above fixing steps are repeated to make the connecting sleeve 43 and the lower sleeve 42 fixedly connected, thereby achieving convenient and stable height adjustment.

[0038] Preferably, the inner wall of the connecting sleeve 43 is provided with a plurality of protrusions 431, each of which is provided with a limiting rib 432. The limiting rib 432 protrudes toward the lower sleeve 42 and is mounted on the top wall of the fixing member 5. The protrusions 431 and the limiting rib 432 are integrally formed on the connecting sleeve 43. The top wall of the fixing member 5 protrudes outward from the lower sleeve 42. The limiting rib 432 engages the top wall of the fixing member 5, so that when the connecting sleeve 43 moves downward along the lower sleeve 42, it can drive the fixing member 5 downward together, and the downward movement effect of the bolt of the control member 6 is more labor-saving and stable. The fixing member 5 not only supports the limiting rib 432, but also cooperates with the positioning rib 71 to limit the limiting rib 432.

[0039] Preferably, two adjacent protrusions 431 are spaced apart, and a limiting groove 433 is provided in the space. The fixing member 5 is circumferentially provided with a buckle 52 corresponding to the position of the limiting groove 433. The limiting rib 432 and the limiting groove 433 jointly constrain the fixing member 5 to be fixed to the connecting sleeve 43. The depth of the limiting groove 433 is configured to be able to be buckled by the buckle 52. The protruding direction of the buckle 52 is toward the limiting groove 433. The buckle 52 is snapped into the bottom of the limiting groove 433, so that when the connecting sleeve 43 moves upward along the lower sleeve 42, it can drive the fixing member 5 to move upward together, and the upward movement effect of the bolt of the control member 6 is more labor-saving and stable.

[0040] Preferably, the fixing member 5 is provided with support ribs 53 along its circumference, and the support ribs 53 are interference-fitted with the connecting sleeve 43. The support ribs 53 are integrally formed with the fixing member 5, and the maximum width of the support ribs 53 is equal to or slightly greater than the distance between the outer wall of the fixing rib and the inner wall of the connecting sleeve 43, forming an interference fit, making the connection between the fixing member 5 and the connecting sleeve 43 more stable.

[0041] Preferably, a support block 513 is provided between the fixing member 5 and the connecting sleeve 43. The support block 513 is held between the inner wall of the connecting sleeve 43 and the anti-rotation groove 511. The elastic arm 51 is integrally formed with the fixing member 5. The elastic arm 51 is provided with a contact protrusion 514 protruding toward the anti-rotation groove 511. The bolt of the control member 6 presses the contact protrusion 514 to move the elastic arm 51 toward the lower sleeve 42. One end of the support block 513 abuts the side wall of the connecting sleeve 43, and the other end abuts the mounting plate 512, so that the mounting plate 512 is fixed between the support block 513 and the elastic arm 51. There is a gap between the elastic arm 51 and the side wall of the lower sleeve 42. The outer contour of the elastic arm 51 protrudes toward the support block 513. The outer contour of the support block 513 covers the outer contour of the elastic arm 51 and corresponds to the position of the gap, thereby improving the stability of the support block 513 in the connecting sleeve 43. As another preferred embodiment, threaded holes are provided on the support block 513 , the mounting plate 512 is omitted, and the bolts of the control member 6 cooperate with the threaded holes on the support block 513 to directly press the contact protrusions 514 on the elastic arms 51 .

[0042] Preferably, a docking joint 7 is provided on the lower sleeve 42, and a positioning rib 71 is circumferentially provided on the docking joint 7. A vertically arranged guide groove 434 is provided on the connecting sleeve 43, and the protrusion 431 is located at the end of the guide groove 434. The limiting rib 432 is clamped between the docking joint 7 and the fixing member 5. When the bolt 71 is removed, the butt joint 7 is separated from the lower sleeve 42 and the butt joint 7 is disconnected from the guide slot 434, so that the butt joint 7 is not disconnected.

[0043] In addition, the base 1, the fan head assembly 2, the upper sleeve 41, the lower sleeve 42, and the connecting sleeve 43 are all configured to be independently detachable. The upper sleeve 41 and the connecting sleeve 43 are detachably connected by manual plugging and unplugging, and the lower sleeve 42 and the base 1 are detachably connected by manual plugging and unplugging. The detachable connection between the connecting sleeve 43 and the lower sleeve 42 has been described above, that is, the operating steps of the bolt leaving the mounting plate 512 will not be repeated here, which reduces the volume during transportation and reduces transportation costs.

[0044] Preferably, the docking head 7 is provided with an annular groove 72 for accommodating the lower sleeve 42, and the annular groove 72 is provided with a supporting protrusion 73, which enables the lower sleeve 42 to engage with the annular groove 72. The supporting protrusion 73 is provided on the inner wall of the annular groove 72 and is integrally formed with the annular groove 72. The supporting protrusion 73 is a spherical protrusion, and its protruding direction is toward the annular groove 72. The top end of the lower sleeve 42 enters the annular groove 72 and abuts against the inner wall of the docking head 7 through the supporting protrusion 73, thereby fixing the lower sleeve 42 to the docking head 7.

[0045] Preferably, an L-shaped groove 421 is provided on the lower sleeve 42, and a positioning pin 74 corresponding to the position of the L-shaped groove 421 is provided on the docking joint 7. The docking joint 7 has a locked state in which the positioning pin 74 is locked to the L-shaped groove 421, and a detachable state in which the positioning pin 74 is loosened from the L-shaped groove 421. The L-shaped groove 421 is composed of a transverse extension portion 422 and a longitudinal extension portion 423. The locked state refers to that the positioning pin 74 is located at the transverse extension portion 422 and away from one end of the longitudinal extension portion 423. In this locked state, the positioning pin 74 cannot be dislodged longitudinally. The detachable state refers to that the positioning pin 74 is located at the transverse extension portion 422 and close to one end of the longitudinal extension portion 423. In this detachable state, the positioning pin 74 can be dislodged from the longitudinal extension portion 423. In the locked state, the bolt fixing holes of the joint 7 and the lower sleeve 42 are coaxially aligned, which facilitates the bolt connection between the joint 7 and the lower sleeve 42 and has a fool-proof effect. In addition, the joint 7 can also be disassembled from the lower sleeve 42, reducing the volume during transportation and reducing transportation costs.

[0046] Preferably, the upper sleeve 41 is provided with electrical components for controlling the fan head assembly 2, and the power lines of the electrical components are led out from the upper sleeve 41. This avoids the influence of the lifting function of the column 4 on the wiring inside the column 4 and the chassis, and the layout is more reasonable.

[0047] The basic working principle of the present invention is as follows: during assembly, first, the positioning pin 74 of the butt joint 7 is inserted from the longitudinal extension portion 423 of the L-shaped groove 421, and then moved toward the end of the transverse extension portion 422 away from the longitudinal extension portion 423, so that the bolt fixing holes of the butt joint 7 and the lower sleeve 42 are coaxially aligned and bolted together to achieve the fixation of the butt joint 7 and the lower sleeve 42. The fixing member 5 is fixed in the connecting sleeve 43, and then the connecting sleeve 43 is inserted from the end of the lower sleeve 42 away from the butt joint 7, and the positioning rib 71 of the butt joint 7 is aligned with the guide groove 434 of the connecting sleeve 43 and slides in until the positioning rib 71 abuts against the protrusion 431. At this time, the limiting rib 432 on the protruding portion 431 abuts against the bottom of the positioning rib 71, forming a limit for the connecting sleeve 43, and then the bolt of the control member 6 is screwed into the bolt fixing hole of the connecting sleeve 43 and the fixing member 5. Under the cooperation of the threaded hole of the mounting plate 512, the bolt penetrates the mounting plate 512 and abuts against the elastic arm 51, and the elastic arm 51 is continuously applied to move toward the direction of the lower sleeve 42 until it is tightly abutted against the lower sleeve 42, thereby achieving a fixed connection between the connecting sleeve 43 and the lower sleeve 42. Finally, the lower sleeve 42 is plugged into the base 1, and the end of the connecting sleeve 43 away from the lower sleeve 42 is plugged into the upper sleeve 41; when disassembling, first pull out the lower sleeve 42 from the base 1, and then pull out the connecting sleeve The end of the tube 43 away from the lower sleeve 42 is pulled out from the upper sleeve 41, and then the knob exposed outside the connecting sleeve 43 is rotated to make the bolt leave the mounting plate 512, and the elastic arm 51 is reset and away from the lower sleeve 42. At this time, the connecting sleeve 43 is in an active state on the outer wall of the lower sleeve 42. The connecting sleeve 43 is disengaged from the end of the lower sleeve 42 away from the docking joint 7 to achieve the separation of the connecting sleeve 43 and the lower sleeve 42. Finally, the bolts of the docking joint 7 and the lower sleeve 42 are removed, and the locating pin 74 of the docking joint 7 is moved from the transverse extension 422 of the L-shaped groove 421 to the end close to the longitudinal extension 423, and then disengaged from above the longitudinal extension 423 to achieve the separation of the docking joint 7 and the lower sleeve 42.

[0048] Example 2:

[0049] A height-adjustable circulation fan, such as Figure 8-9As shown, the difference between this embodiment and specific embodiment 1 is that: preferably, a docking hole 411 is provided on the upper sleeve 41, and the circulation fan has a first working state in which the docking joint 7 is directly connected to the upper sleeve 41 through the docking hole 411, and a second working state in which the docking joint 7 is indirectly connected to the upper sleeve 41 through the connecting sleeve 43, and the height of the first working state is different from the height of the second working state. A protrusion 75 corresponding to the docking hole 411 is protruded from the docking joint 7, and the contour of the protrusion 75 is adapted to the contour of the docking hole 411. In the first working state, the connecting sleeve 43 and the fixing part 5 are in a disassembled state, and the lower sleeve 42 is directly plugged and fixed to the upper sleeve 41 through the docking joint 7. In the second working state, the connecting sleeve 43 is fixedly connected between the upper sleeve 41 and the lower sleeve 42, extending the overall height of the circulation fan in the first working state. The second working state is the content described in Example 1, and the steps of how to realize disassembly and assembly in the first working state are consistent with the above working principle, which will not be elaborated here. It further realizes the height adjustment of the circulation fan, which can be adjusted by lifting the column 4 in the second working state, and can also be adjusted by disassembling one section of the column 4. It can be assembled according to different needs, which is more humane.

[0050] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A height-adjustable circulation fan, comprising a base (1), a fan head assembly (2), and a column (4) connecting the fan head assembly (2) and the base (1), characterized in that: The column (4) includes an upper sleeve (41) connected to the fan head assembly (2), a lower sleeve (42) and a connecting sleeve (43) movably connected between the upper sleeve (41) and the lower sleeve (42), wherein a fixing member (5) is fixedly connected in the connecting sleeve (43), an elastic arm (51) is formed on the fixing member (5), a rotation-stop groove (511) is provided on the elastic arm (51), a mounting plate (512) is provided in the rotation-stop groove (511), and a control member (6) is provided on the connecting sleeve (43) and is passed through the mounting plate (512) and extends out of the connecting sleeve (43), wherein the control member (6) cooperates with the mounting plate (512) to drive the elastic arm (51) to approach and press against the lower sleeve (42), or the control member (6) moves away from and releases the elastic arm (51) to allow the connecting sleeve (43) to slide relative to the lower sleeve (42).

2. The height-adjustable circulation fan according to claim 1, characterized in that: A plurality of protrusions (431) are provided on the inner wall of the connecting sleeve (43), and a limiting rib (432) is provided on the protrusion (431). The limiting rib (432) protrudes toward the lower sleeve (42) and is mounted on the top wall of the fixing member (5).

3. The height-adjustable circulation fan according to claim 2, characterized in that: A limiting groove (433) is provided between two adjacent protrusions (431); a buckle (52) corresponding to the position of the limiting groove (433) is circumferentially provided on the fixing member (5); and the limiting rib (432) and the limiting groove (433) jointly constrain the fixing member (5) to be fixed to the connecting sleeve (43).

4. The height-adjustable circulation fan according to claim 1, characterized in that: The fixing member (5) is provided with supporting ribs (53) in the circumferential direction, and the supporting ribs (53) are interference-fitted with the connecting sleeve (43).

5. The height-adjustable circulation fan according to claim 1, characterized in that: A support block (513) is provided between the fixing member (5) and the connecting sleeve (43), and the support block (513) is supported between the inner wall of the connecting sleeve (43) and the anti-rotation groove (511).

6. The height-adjustable circulation fan according to claim 2, characterized in that: The lower sleeve (42) is provided with a docking joint (7), the docking joint (7) is circumferentially provided with positioning ribs (71), the connecting sleeve (43) is provided with a vertically arranged guide slot (434), the protrusion (431) is located at the end of the guide slot (434), and the limiting rib (432) is sandwiched between the docking joint (7) and the fixing member (5).

7. The height-adjustable circulation fan according to claim 6, characterized in that: The butt joint (7) is provided with an annular groove (72) for accommodating the lower sleeve (42), and the annular groove (72) is provided with a supporting protrusion (73), and the supporting protrusion (73) enables the lower sleeve (42) to engage with the annular groove (72).

8. The height-adjustable circulation fan according to claim 6, characterized in that: An L-shaped groove (421) is provided on the lower sleeve (42), and a positioning pin (74) corresponding to the position of the L-shaped groove (421) is provided on the docking head (7). The docking head (7) has a locked state in which the positioning pin (74) is locked in the L-shaped groove (421), and a detachable state in which the positioning pin (74) is loosened from the L-shaped groove (421).

9. The height-adjustable circulation fan according to claim 1, characterized in that: An electrical component for controlling the fan head assembly (2) is arranged in the upper sleeve (41), and a power line of the electrical component is led out from the upper sleeve (41).

10. The height-adjustable circulation fan according to claim 6, characterized in that: The upper sleeve (41) is provided with a docking hole (411), and the circulation fan has a first working state in which the docking head (7) is directly connected to the upper sleeve (41) through the docking hole (411), and a second working state in which the docking head (7) is indirectly connected to the upper sleeve (41) through the connecting sleeve (43), and the height of the first working state is different from the height of the second working state.

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