Electric fan head swinging structure

Abstract

The utility model discloses a swinging head structure of an electric fan, which relates to a fan and comprises a fan shell, an air outlet cover is rotatably connected onto the fan shell, a motor is connected on the inner side of the air outlet cover, fan blades are rotatably connected onto the motor, a driving pulley is fixedly connected onto a rotor of the motor, and a driven pulley is rotatably connected onto the bottom of the fan shell. A transmission belt is arranged between the driving belt wheel and the driven belt wheel, a tightening mechanism used for tightening the transmission belt is arranged on the fan shell, a driving mechanism used for driving the air outlet cover to swing is arranged at the bottom of the fan shell, and the driving mechanism is in transmission connection with the driven belt wheel. Compared with the prior art, the air outlet cover has the advantages that the air outlet cover is simple in structure and convenient to use, linkage of the swing mechanism can be achieved only by pressing the extrusion rod exposed on the fan shell during use, then the air outlet cover can swing up and down in the vertical face direction, and the use requirements of different customers are met.

Description

Technical Field

[0001] The utility model relates to a fan, in particular to a structure for a table fan to swing its head. Background Art

[0002] In modern life, as a common household appliance, the electric fan brings coolness to people in hot weather. However, traditional electric fans often have some deficiencies in the function of swinging their heads.

[0003] The head-swinging structure of past electric fans usually swings left and right in the horizontal plane, and this structure is not applicable to some types of fans. For some office fans, their structure can adjust the wind direction in the vertical plane, and there is currently no effective head-swinging structure for such fans, so the use effect is not good.

[0004] Therefore, it is necessary to develop a head-swinging structure for an electric fan that is simple in structure, convenient to use, and can flexibly meet the usage requirements of different customers, so as to improve the user experience and the market competitiveness of the product. For this reason, technical personnel in this field have proposed a head-swinging structure for an electric fan to solve the problems raised in the above background. Summary of the Invention

[0005] The purpose of the utility model is to provide a head-swinging structure for an electric fan to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A head-swinging structure for an electric fan includes a fan housing, an air outlet cover is rotatably connected to the fan housing, a motor is connected to the inner side of the air outlet cover, a fan blade is rotatably connected to the motor, a driving pulley is fixedly connected to the motor rotor, a driven pulley is rotatably connected to the bottom of the fan housing, a transmission belt is arranged between the driving pulley and the driven pulley, a tensioning mechanism for tensioning the transmission belt is arranged on the fan housing, a driving mechanism for driving the air outlet cover to swing is arranged at the bottom of the fan housing, and the driving mechanism is in transmission connection with the driven pulley.

[0008] As a further scheme of the utility model: a wind guiding plate is fixedly connected to the air outlet cover, an air inlet partition is fixedly connected to the side surface of the fan housing, and a support foot pad is fixedly connected to the bottom of the fan housing.

[0009] As a still further scheme of the utility model: the tensioning mechanism includes a pressing rod slidably connected to the fan housing, a pressing head is fixedly connected to the outer end of the pressing rod, the pressing head is magnetically matched with the fan housing, a tensioning wheel is fixedly connected to the inner end of the pressing rod, the tensioning wheel is in pressing cooperation with the transmission belt, and a first spring for resetting is fixedly connected between the pressing head and the fan housing.

[0010] As a further solution of the present utility model: The driving mechanism includes an incomplete gear coaxially fixed with the driven pulley. A rack is slidably connected to the bottom of the fan housing. The incomplete gear meshes with the rack. A fork is fixedly connected above the rack, and a driven lever is fixedly connected to the air outlet cover. The fork cooperates with the driven lever. A second spring for resetting is fixedly connected to the rack.

[0011] As a further solution of the present utility model: The central angle corresponding to the toothless part of the incomplete gear is not less than 90°.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and easy to use. When in use, only by pressing the exposed extrusion rod on the fan housing, the linkage of the swinging mechanism can be realized, and then the air outlet cover can swing up and down in the vertical direction to meet the usage requirements of different customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a swing head structure of an electric fan;

[0014] Figure 2 It is a schematic cross-sectional structure diagram of a swing head structure of an electric fan;

[0015] Figure 3 It is a schematic enlarged partial structure diagram of a swing head structure of an electric fan;

[0016] Figure 4 It is a schematic structural diagram of an incomplete gear in a swing head structure of an electric fan;

[0017] In the figure: 1. Fan housing; 2. Air outlet cover; 3. Motor; 4. Driving pulley; 5. Driven pulley; 6. Transmission belt; 7. Tensioning mechanism; 8. Extrusion rod; 9. Extrusion head; 10. Tensioning wheel; 11. First spring; 12. Driving mechanism; 13. Incomplete gear; 14. Rack; 15. Fork; 16. Driven lever; 17. Second spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0021] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0022] Please refer to Figures 1-4 , a swing structure of an electric fan, comprising a fan housing 1, a wind outlet cover 2 is rotatably connected to the fan housing 1, a motor 3 is connected to the inner side of the wind outlet cover 2, a fan blade is rotatably connected to the motor 3, a driving pulley 4 is fixedly connected to the rotor of the motor 3, a driven pulley 5 is rotatably connected to the bottom of the fan housing 1, a transmission belt 6 is arranged between the driving pulley 4 and the driven pulley 5, a tensioning mechanism 7 for tensioning the transmission belt 6 is arranged on the fan housing 1, a driving mechanism 12 for driving the wind outlet cover 2 to swing is arranged at the bottom of the fan housing 1, and the driving mechanism 12 is in transmission connection with the driven pulley 5.

[0023] The fan applied in this application is a kind of desktop fan for office use, which is an existing fan. The fan blade is driven by a motor 3 to rotate. Air enters from the side of the fan housing 1 and blows out from the front side. The wind direction is relatively fixed and the wind force is large, but there is no mechanism for up and down swinging for driving. Through the structure disclosed in this application, swinging on the vertical plane can be realized, which is not equivalent to the horizontal swinging mechanism of the existing fan. When in use, by pressing the tensioning mechanism 7 inward, the internal transmission belt 6 can be tensioned to realize power transmission, and the mechanism can drive the air outlet hood 2 to swing.

[0024] A wind guiding plate is fixedly connected to the air outlet hood 2, an air inlet partition plate is fixedly connected to the side of the fan housing 1, and a support foot pad is fixedly connected to the bottom of the fan housing 1. The wind guiding plate is used to guide the air discharged from the air outlet hood 2. The air inlet partition plate prevents larger sundries from entering the fan housing 1 through the side of the device. The support foot pad is made of anti-slip silica gel and other materials, which can ensure the stable placement of the device.

[0025] The tensioning mechanism 7 includes a pressing rod 8 slidably connected to the fan housing 1. An extrusion head 9 is fixedly connected to the outer end of the pressing rod 8. The extrusion head 9 is magnetically matched with the fan housing 1. A tensioning wheel 10 is fixedly connected to the inner end of the pressing rod 8. The tensioning wheel 10 is in extrusion fit with the transmission belt 6. A first spring 11 for resetting is fixedly connected between the extrusion head 9 and the fan housing 1.

[0026] The tensioning mechanism 7 realizes tensioning through the position of the pressing rod 8. Other tensioning mechanisms can also be used, as long as the tensioning of the transmission belt 6 can be realized. In this actual example, by pressing the extrusion head 9, the extrusion head 9 moves inward, and then drives the tensioning wheel 10 to press the transmission belt 6 to realize the tensioning of the transmission belt 6, and then power transmission can be realized. A magnet is fixedly connected to the fan housing 1, and a magnet is also fixedly connected to the extrusion head 9. The two are mutually attracted. After pressing, the position can be fixed through the magnetic attraction of the magnets. In addition, the pressing head 9 can also adopt a rotatable mechanism, and then can be screwed onto the fan housing 1 by means of threaded connection. The first spring 11 provides spring force, and can pop up the extrusion head 9 after the extrusion head 9 is separated from the fan housing 1, on the one hand to prevent falling, and on the other hand to make the fan in a state of not shaking its head.

[0027] The driving mechanism 12 includes an incomplete gear 13 coaxially fixed with the driven pulley 5. A rack 14 is slidably connected to the bottom of the fan housing 1. The incomplete gear 13 is meshed with the rack 14. A fork 15 is fixedly connected above the rack 14. A driven dial rod 16 is fixedly connected to the air outlet hood 2. The fork 15 is matched with the driven dial rod 16. A second spring 17 for resetting is fixedly connected to the rack 14.

[0028] This embodiment provides a specific driving mechanism. Through the synchronous rotation between the incomplete gear 13 and the driven pulley 5, after the tensioning mechanism 7 is tensioned, the incomplete gear 13 continues to rotate, and then drives the rack 14 to reciprocate. When the toothless part of the incomplete gear 13 cooperates with the rack 14, reset is achieved. At this time, the second spring 17 provides the reset force for the rack 14. During the reciprocating movement of the rack 14, the fork 15 is driven to move left and right, then the driven lever 16 is driven to move synchronously, and the air outlet hood 2 is driven to shake its head in the vertical plane.

[0029] The central angle corresponding to the toothless part of the incomplete gear 13 is not less than 90°.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An oscillating structure of an electric fan, comprising a fan housing (1), an air outlet cover (2) is rotatably connected to the fan housing (1), a motor (3) is connected to the inner side of the air outlet cover (2), and a fan blade is rotatably connected to the motor (3), characterized in that, A driving pulley (4) is fixedly connected to the rotor of the motor (3). A driven pulley (5) is rotatably connected to the bottom of the fan housing (1). A transmission belt (6) is provided between the driving pulley (4) and the driven pulley (5). A tensioning mechanism (7) for tensioning the transmission belt (6) is provided on the fan housing (1). A driving mechanism (12) for driving the air outlet hood (2) to swing is provided at the bottom of the fan housing (1). The driving mechanism (12) is in transmission connection with the driven pulley (5).

2. The oscillating structure of the electric fan according to claim 1, characterized in that, A wind guiding plate is fixedly connected to the air outlet hood (2). An air inlet partition plate is fixedly connected to the side surface of the fan housing (1). Support feet pads are fixedly connected to the bottom of the fan housing (1).

3. The oscillating head structure of the electric fan according to claim 1, characterized in that, The tensioning mechanism (7) includes a pressing rod (8) slidably connected to the fan housing (1). A pressing head (9) is fixedly connected to the outer end of the pressing rod (8). The pressing head (9) is magnetically matched with the fan housing (1). A tensioning wheel (10) is fixedly connected to the inner end of the pressing rod (8). The tensioning wheel (10) is in pressing cooperation with the transmission belt (6). A first spring (11) for resetting is fixedly connected between the pressing head (9) and the fan housing (1).

4. The oscillating structure of the electric fan according to claim 1, wherein, The driving mechanism (12) includes an incomplete gear (13) coaxially fixed to the driven pulley (5). A rack (14) is slidably connected to the bottom of the fan housing (1). The incomplete gear (13) meshes with the rack (14). A fork (15) is fixedly connected above the rack (14). A driven lever (16) is fixedly connected to the air outlet hood (2). The fork (15) cooperates with the driven lever (16). A second spring (17) for resetting is fixedly connected to the rack (14).

5. The electric fan swing head structure according to claim 1, wherein, The central angle corresponding to the toothless part of the incomplete gear (13) is not less than 90°.

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