Air circulation fan

Abstract

The air circulation fan comprises a base, a supporting rod and a machine head assembly which are sequentially connected, the machine head assembly comprises a rear shell, fan blades, a rotating motor, a rotating cylinder, an extending cylinder and a driving mechanism, the rotating motor and the fan blades are arranged in the rear shell, and the rotating motor is used for driving the fan blades to rotate; the upper end of the supporting rod is fixedly connected with the outer side face of the rear shell, and a strip-shaped hole extending in the front-back direction is formed in the side face of the rear shell. The rotating cylinder is inserted into the rear shell and is in running fit with the inner wall of the rear shell, a spiral through hole is formed in the side face of the rotating cylinder, and the spiral through hole communicates with the strip-shaped hole; the extension cylinder is inserted into the rotating cylinder, a positioning block is arranged on the side face of the extension cylinder, and the positioning block penetrates through the spiral through hole and then extends into the strip-shaped hole; the driving mechanism is arranged on the outer side face of the rear shell and used for driving the rotating cylinder to rotate. The method has the advantage of improving the stability and accuracy of air duct length adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and in particular relates to an air circulator fan. Background Technology

[0002] An air circulator is an electrical device that promotes indoor air circulation through a strong and stable airflow. Unlike traditional fans, the main function of an air circulator is to accelerate air circulation, make the indoor temperature more uniform, and improve the overall comfort of the environment.

[0003] Air circulators typically have fixed-length ducts that cannot be adjusted to suit different usage environments. To address this, patent application CN202420161849.6 discloses an air circulator with an automatically adjustable output duct. This invention includes a base, a support rod assembly on the base, and a fan head on the support rod assembly. The fan head comprises a fan head assembly, an air inlet shroud, a fixed duct tube, a telescopic outlet tube, a rotating tube, and a rotation drive device. This solution uses the rotation drive device to control the rotation of the rotating tube, which in turn drives the telescopic outlet tube to extend and retract, thus achieving automatic adjustment of the output duct length.

[0004] In the above technical solution, the rotating cylinder is sleeved on the outside of the telescopic air outlet, and the protrusion on the telescopic air outlet is provided with a spiral groove. There is no axial guide mechanism between the telescopic air outlet and the fixed air duct. During the rotation of the rotating cylinder, the telescopic air outlet may be driven to rotate, which will cause the adjustment of the telescopic air outlet to become less precise and affect the use effect. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an air circulation fan that can improve the stability and accuracy of duct length adjustment.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an air circulation fan, comprising a base, a support rod, and a head assembly connected in sequence. The head assembly includes a rear shell, fan blades, a rotating motor, a rotating cylinder, an extension cylinder, and a drive mechanism. The rotating motor and the fan blades are disposed within the rear shell, and the rotating motor is used to drive the fan blades to rotate. The upper end of the support rod is fixedly connected to the outer side of the rear shell. The side of the rear shell is provided with a strip-shaped hole extending in the front-rear direction. The rotating cylinder is inserted into the rear shell and rotates in cooperation with the inner wall of the rear shell. A spiral through hole is provided on the side of the rotating cylinder, and the spiral through hole communicates with the strip-shaped hole. The extension cylinder is inserted into the rotating cylinder, and a positioning block is provided on the side of the extension cylinder. The positioning block passes through the spiral through hole and extends into the strip-shaped hole. The drive mechanism is disposed on the outer side of the rear shell and is used to drive the rotating cylinder to rotate.

[0007] Preferably, an annular protrusion surrounding the strip hole is fixedly provided on the outer side of the rear shell, and a transparent cover is provided on the annular protrusion.

[0008] Preferably, the outer side of the transparent cover is integrally provided with a lever.

[0009] Preferably, the front end of the rotating cylinder protrudes outward along the circumferential direction to form an outer convex ring, which abuts against the front end face of the rear shell.

[0010] Preferably, an external gear ring is fixedly provided at the rear end of the rotating cylinder, an opening is provided on the rear shell, the driving mechanism includes a drive motor and a gear, the drive motor is fixedly provided on the outer side of the rear shell, the gear is connected to the drive shaft of the drive motor, and part of the gear passes through the opening and meshes with the external gear ring.

[0011] Preferably, the drive mechanism further includes a housing that covers the drive motor and gear and is connected to the rear housing.

[0012] Preferably, a limiting protrusion is fixedly provided on the inner side of the rear shell, and a rubber pad is provided on the front side of the limiting protrusion, which contacts the rear side of the outer gear ring.

[0013] Preferably, the side of the extension cylinder is provided with a screw hole, and a screw is fixedly provided on the positioning block, the screw being threadedly connected to the screw hole.

[0014] Preferably, the front end of the extension tube is provided with an air outlet grille.

[0015] Compared with the prior art, the advantages of this utility model are as follows: by setting a strip hole on the rear shell and a spiral through hole on the rotating cylinder, the positioning block on the extension cylinder is sequentially inserted through the spiral through hole and the strip hole. When the driving mechanism drives the rotating cylinder to rotate, the positioning block will move in the front-back direction and drive the extension cylinder to move back and forth, thereby achieving the purpose of adjusting the length of the air duct. The strip hole and the positioning block cooperate to prevent the extension cylinder from rotating, which has good stability and helps to improve the accuracy of the extension cylinder length adjustment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded structural diagram of the head assembly in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the rear shell in this utility model;

[0019] Figure 4 This is a schematic diagram of the transparent cover in this utility model;

[0020] Figure 5 This is a schematic diagram of the rotating cylinder in this utility model;

[0021] Figure 6 This is a schematic diagram of the positioning block in this utility model.

[0022] In the diagram: 1. Base; 2. Support rod; 3. Head assembly; 31. Rear shell; 311. Strip hole; 312. Annular protrusion; 313. Transparent cover; 3131. Toggle block; 314. Opening; 315. Limiting protrusion; 316. Rubber pad; 32. Fan blade; 33. Rotating motor; 34. Rotating cylinder; 341. Spiral through hole; 342. Outer protruding ring; 35. Extension cylinder; 351. Positioning block; 3511. Screw; 352. Screw hole; 36. Drive mechanism; 361. Drive motor; 362. Gear; 363. Outer shell; 37. Air outlet grille; 4. Outer gear ring. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0025] Example 1: As Figures 1 to 3 As shown, an air circulator fan includes a base 1, a support rod 2, and a head assembly 3 connected in sequence. The head assembly 3 includes a rear shell 31, fan blades 32, a rotating motor 33, a rotating cylinder 34, an extension cylinder 35, and a drive mechanism 36. The rotating motor 33 and the fan blades 32 are disposed inside the rear shell 31, and the rotating motor 33 is used to drive the fan blades 32 to rotate. The upper end of the support rod 2 is fixedly connected to the outer side of the rear shell 31.

[0026] In this embodiment, the rear shell 31 has a strip-shaped hole 311 extending in the front-rear direction on its side; the rotating cylinder 34 is inserted into the rear shell 31 and rotates with the inner wall of the rear shell 31; the rotating cylinder 34 has a spiral through hole 341 on its side, which is connected to the strip-shaped hole 311; the extension cylinder 35 is inserted into the rotating cylinder 34; the extension cylinder 35 has a positioning block 351 on its side, which passes through the spiral through hole 341 and extends into the strip-shaped hole 311; the driving mechanism 36 is disposed on the outer side of the rear shell 31 and is used to drive the rotating cylinder 34 to rotate. The rear shell 31, the rotating cylinder 34 and the extension cylinder 35 cooperate to form an air duct. The length of the air duct is adjusted by adjusting the extension of the extension cylinder 35.

[0027] In this embodiment, an air outlet grille 37 is provided at the front end of the extension tube 35.

[0028] Example 2: Figures 2 to 5 As shown, the rest of the parts are the same as in Embodiment 1, except that an annular protrusion 312 surrounding the strip hole 311 is fixedly provided on the outer surface of the rear shell 31, and a transparent cover 313 is provided on the annular protrusion 312. The annular protrusion 312 helps to improve the structural strength at the strip hole 311, avoids deformation due to rapid wear, and helps to extend the service life. At the same time, the transparent cover 313 provides an isolation function, preventing the user's fingers from being inserted into the annular protrusion 312 and possibly coming into contact with the positioning block 351, thus providing good safety. Of course, the position of the positioning block 351 can also be quickly confirmed through the transparent cover 313.

[0029] In this embodiment, a lever 3131 is integrally provided on the outer side of the transparent cover 313 to facilitate the user to open the transparent cover 313.

[0030] In this embodiment, the front end of the rotating cylinder 34 protrudes outward along the circumferential direction to form an outer protruding ring 342. The outer protruding ring 342 abuts against the front end face of the rear shell 31. The outer protruding ring 342 serves as a limiting element and also improves the structural strength of the front part of the rotating cylinder 34.

[0031] Example 3: Figure 2 , Figure 3 and Figure 6 As shown, the rest of the components are the same as in Embodiment 1, except that an external gear ring 4 is fixedly mounted at the rear end of the rotating cylinder 34, and an opening 314 is provided on the rear shell 31. The drive mechanism 36 includes a drive motor 361 and a gear 362. The drive motor 361 is fixedly mounted on the outer side of the rear shell 31, and the gear 362 is connected to the drive shaft of the drive motor 361. Part of the gear 362 passes through the opening 314 and meshes with the external gear ring 4. After the drive motor 361 is started, it drives the rotating cylinder 34 to rotate through the gear 362 and the external gear ring 4.

[0032] In this embodiment, the drive mechanism 36 also includes a housing 363, which covers the drive motor 361 and the gear 362 and is connected to the rear housing 31. The housing 363 serves a protective function.

[0033] In this embodiment, a limiting protrusion 315 is fixedly provided on the inner side of the rear shell 31, and a rubber pad 316 is provided on the front side of the limiting protrusion 315. The rubber pad 316 contacts the rear side of the outer gear ring 4, and the limiting protrusion 315 and the rubber pad 316 cooperate to perform the limiting function.

[0034] In this embodiment, the side of the extension cylinder 35 is provided with a screw hole 352, and a screw 3511 is fixedly provided on the positioning block 351. The screw 3511 is threadedly connected to the screw hole 352, which facilitates the assembly of the extension cylinder 35. At the same time, the structure is simple and easy to replace.

[0035] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An air circulator fan, comprising a base (1), a support rod (2), and a head assembly (3) connected in sequence, wherein the head assembly (3) includes a rear shell (31), fan blades (32), a rotating motor (33), a rotating cylinder (34), an extension cylinder (35), and a drive mechanism (36), wherein the rotating motor (33) and the fan blades (32) are disposed within the rear shell (31), and the rotating motor (33) is used to drive the fan blades (32) to rotate, and the upper end of the support rod (2) is fixedly connected to the outer surface of the rear shell (31), characterized in that: The side of the rear shell (31) is provided with a strip-shaped hole (311) extending in the front-rear direction; The rotating cylinder (34) is inserted into the rear shell (31) and rotates in cooperation with the inner wall of the rear shell (31). A spiral through hole (341) is provided on the side of the rotating cylinder (34), and the spiral through hole (341) is connected to the strip hole (311). The extension tube (35) is inserted into the rotating tube (34). A positioning block (351) is provided on the side of the extension tube (35). The positioning block (351) passes through the spiral through hole (341) and extends into the strip hole (311). The drive mechanism (36) is disposed on the outer side of the rear shell (31) and is used to drive the rotating cylinder (34) to rotate.

2. An air circulator fan according to claim 1, characterized in that: An annular protrusion (312) surrounding the strip hole (311) is fixedly provided on the outer side of the rear shell (31), and a transparent cover (313) is provided on the annular protrusion (312).

3. An air circulator fan according to claim 2, characterized in that: The outer side of the transparent cover (313) is integrally provided with a lever (3131).

4. An air circulator fan according to claim 1, characterized in that: The front end of the rotating cylinder (34) protrudes outward along the circumferential direction to form an outer protruding ring (342), and the outer protruding ring (342) abuts against the front end face of the rear shell (31).

5. An air circulator fan according to claim 1, characterized in that: An external gear ring (4) is fixedly provided at the rear end of the rotating cylinder (34). An opening (314) is provided on the rear shell (31). The driving mechanism (36) includes a driving motor (361) and a gear (362). The driving motor (361) is fixedly provided on the outer side of the rear shell (31). The gear (362) is connected to the driving shaft of the driving motor (361). Part of the gear (362) passes through the opening (314) and meshes with the external gear ring (4).

6. An air circulator fan according to claim 5, characterized in that: The drive mechanism (36) also includes a housing (363) which covers the drive motor (361) and gear (362) and is connected to the rear housing (31).

7. An air circulator fan according to claim 5, characterized in that: A limiting protrusion (315) is fixedly provided on the inner side of the rear shell (31), and a rubber pad (316) is provided on the front side of the limiting protrusion (315), and the rubber pad (316) is in contact with the rear side of the outer gear ring (4).

8. An air circulator fan according to claim 1, characterized in that: The extension tube (35) has a screw hole (352) on its side, and a screw (3511) is fixedly installed on the positioning block (351). The screw (3511) is threadedly connected to the screw hole (352).

9. An air circulator fan according to claim 1, characterized in that: The front end of the extension tube (35) is provided with an air outlet grille (37).

Images