Compact fan structure and hair trimmer

Abstract

The utility model relates to the technical field of hair trimmers, and discloses a compact fan structure and a hair trimmer, the compact fan structure comprises a fan shell and a fixing piece which are mutually and rotatably connected, an impeller is arranged on one side, far away from the fixing piece, of the fan shell, and the fixing piece is suitable for being connected with parts on the hair trimmer. The impeller and the fan shell are integrally formed, a stator is arranged on the fixing piece, an inner cavity is formed in the fan shell, the stator is arranged in the inner cavity, a rotor is arranged on the inner wall of the inner cavity, and the stator is arranged on the inner side of the rotor. During working, the rotor rotates relative to the stator and drives the fan shell and the impeller to rotate synchronously. The impeller and the fan shell are integrally formed, so that the structure is simpler and more compact, the overall size of the fan is smaller, the occupied space is small, and the production cost is low; the compact fan structure can reduce the overall size of the hair trimmer, and handheld operation and carrying are convenient.

Description

Technical Field

[0001] This utility model relates to the field of hair trimmer technology, and more specifically, to a compact fan structure and a hair trimmer. Background Technology

[0002] Some existing hair trimmers with hair suction functions include a housing and a motor fan inside the housing. The motor fan generates suction to pull out hair. The motor fan includes a motor and fan blades connected to the motor output shaft. The motor housing and fan blades are separate parts (i.e., the motor housing and fan blades are two separate parts). There is a gap between the fan blades and the motor housing, which makes the overall size of the fan relatively large. As a result, these hair trimmers with hair suction are bulky and inconvenient to hold, operate, and carry. In addition, the separate structure of the motor housing and fan blades is relatively complex. The fan blades need to be assembled with the motor output shaft, which increases the production and assembly costs. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model provides a compact fan structure suitable for mounting on a hair trimmer. The compact fan structure includes a fan housing and a fixing component rotatably connected to each other. An impeller is disposed on the side of the fan housing away from the fixing component. The fixing component is adapted to connect with components on the hair trimmer. The impeller is integrally formed with the fan housing. A stator is disposed on the fixing component. An inner cavity is provided inside the fan housing, and the stator is placed within the inner cavity. A rotor is disposed on the inner wall of the inner cavity, and the stator is placed inside the rotor. During operation, the rotor rotates relative to the stator, driving the fan housing and the impeller to rotate synchronously. This utility model's integrally formed impeller and fan housing structure results in a simpler and more compact structure, making the overall fan smaller, occupying less space, and reducing production costs. The compact fan structure reduces the overall size of the hair trimmer, facilitating handheld operation and portability.

[0004] Optionally, the stator is provided with a winding groove for winding a wire to form a winding; the rotor includes an annular rotor frame and a permanent magnet disposed on the rotor frame; when the wire is energized, the rotor drives the fan housing to rotate relative to the stator.

[0005] Optionally, the rotor frame is annular, and the central axis of the rotor frame, the central axis of the stator, and the central axis of the impeller coincide.

[0006] Optionally, multiple permanent magnets are provided, and the multiple permanent magnets are distributed in a ring with equal spacing.

[0007] Optionally, a protrusion is provided on the inner wall of the cavity, and a first mounting groove for mounting the permanent magnet is provided on the protrusion.

[0008] Optionally, the fan housing is provided with a second mounting groove for mounting the rotor frame in an annular shape, the fan housing is provided with a locking block, the rotor frame is provided with a locking groove that engages with the locking block, and the locking block is provided with a guide slope to facilitate the insertion of the rotor frame into the second mounting groove.

[0009] Optionally, a rotating shaft is provided on the fan housing, the central axis of the rotating shaft coincides with the central axis of the impeller, the rotating shaft is rotatably mounted on the fixing member, and a bearing is provided between the rotating shaft and the fixing member.

[0010] Optionally, the fan housing includes a connecting plate, and the impeller includes a plurality of blades, one end of which is integrally formed with the connecting plate.

[0011] Optionally, the connecting plate is provided with protruding posts, including a first protruding post and a second protruding post. The first protruding post is formed on the side of the connecting plate near the impeller, and the second protruding post is formed on the side of the connecting plate away from the impeller. A through hole for installing the rotating shaft is provided through the inner side of the protruding post. One end of the rotating shaft is inserted into the through hole, and the other end of the rotating shaft is connected to the bearing. An air guiding arc surface is provided on the first protruding post, and an air outlet is provided on the impeller. The air guiding arc surface is used to guide the airflow generated by the rotation of the fan blades to the air outlet and blow it out.

[0012] Compared to existing technologies, the compact fan structure of this invention integrates the impeller and the fan housing, resulting in a simpler and more compact structure, smaller overall fan size, less space occupation, and lower production costs. This compact fan structure reduces the overall size of the hair trimmer, making it easier to handle and carry. The inner wall of the cavity is provided with protrusions, each with a first mounting groove for installing a permanent magnet. The permanent magnet is securely engaged in the first mounting groove, preventing displacement and ensuring structural reliability. When the rotor frame is inserted into the second mounting groove, a locking block falls into the groove and engages, limiting the rotor frame and preventing it from accidentally dislodging from the second mounting groove, ensuring a stable and reliable rotor frame installation. The first and second protrusions increase the extension length of the through hole, increasing the contact area between the through hole wall and the rotating shaft, making the connection between the rotating shaft and the fan housing more secure. The first protrusion has a ring-shaped air-guiding arc surface, making the airflow smoother and increasing the airflow force.

[0013] In addition, this utility model also provides a hair trimmer, including the above-mentioned compact fan structure. This hair trimmer also has the same beneficial effects of the above-mentioned compact fan structure, which will not be described in detail here. Attached Figure Description

[0014] Figure 1 This is a perspective view of the compact fan structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the bottom of the compact fan structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the compact fan structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the compact fan housing of this utility model;

[0018] Figure 5 This is a schematic diagram of the compact fan rotor frame of this utility model;

[0019] The component names corresponding to the various labels in the figure are as follows: 1 is the fan housing, 101 is the inner cavity, 102 is the protrusion, 103 is the first mounting groove, 104 is the second mounting groove, 105 is the locking block, 106 is the guide slope, 2 is the fixing part, 21 is the fixing connection part, 3 is the impeller, 31 is the fan blade, 32 is the air outlet, 4 is the stator, 41 is the winding groove, 5 is the rotor, 51 is the rotor frame, 511 is the locking groove, 52 is the permanent magnet, 6 is the rotating shaft, 61 is the limiting buckle, 7 is the bearing, 8 is the protrusion, 80 is the through hole, 81 is the first protrusion, 811 is the air guide arc surface, 82 is the second protrusion, and 11 is the connecting plate. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0022] The terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0023] See Figures 1-5This utility model provides a compact fan structure suitable for mounting on a hair trimmer. The compact fan structure includes a fan housing 1 and a fixing member 2 rotatably connected to each other. An impeller 3 is disposed on the side of the fan housing 1 away from the fixing member 2. The fixing member 2 is adapted to be fixedly connected to components on the hair trimmer. A fixing connection part 21 is disposed at the end of the fixing member 2 away from the impeller 3, and the fixing connection part 21 is adapted to be fixedly connected to components on the hair trimmer. The fixing connection part 21 is fixedly connected to the components on the hair trimmer by bolts, glue, tight fitting, etc. The impeller 3 is integrally formed with the fan housing 1. When the fan housing 1 rotates, it has a rotation axis that coincides with or nearly coincides with the central axis of the impeller 3, so that the impeller... 3. When rotating, it generates a large wind force; a stator 4 is provided on the fixed part 2, and an inner cavity 101 is provided inside the fan housing 1. The stator 4 is placed in the inner cavity 101, and a rotor 5 is provided on the inner wall of the inner cavity 101. The stator 4 is placed inside the rotor 5. When the fan is powered on, the rotor 5 drives the fan housing 1 to rotate relative to the stator. When the impeller 3 on the fan housing 1 rotates, it generates wind force; when working, the rotor 5 rotates relative to the stator 4, and the rotor 5 drives the fan housing 1 and the impeller 3 to rotate synchronously; the impeller and the fan housing of this utility model are integrally formed, making the structure simpler and more compact, making the overall size of the fan smaller, occupying less space, and reducing production costs; the compact fan structure can reduce the overall size of the hair trimmer, making it easy to operate by hand and carry.

[0024] See Figures 1-3 The stator 4 is provided with a winding groove 41, which is used to wind wires to form a winding; the rotor 5 includes an annular rotor frame 51 and a permanent magnet 52 disposed on the rotor frame 51; when the wire is energized, the rotor 5 drives the fan housing 1 to rotate relative to the stator 4, and generates wind power through the impeller 3 on the fan housing 1.

[0025] See Figures 2-5The rotor frame 51 is annular, and the central axis of the rotor frame 51, the central axis of the stator 4, and the central axis of the impeller 3 coincide. Multiple permanent magnets 52 are arranged in a ring with equal spacing, ensuring stable rotation of the impeller 3. A protrusion 102 is provided on the inner wall of the inner cavity 101, and a first mounting groove 103 is provided on the protrusion 102 for mounting the permanent magnets 52. The permanent magnets 52 are snapped into the first mounting groove 103, preventing displacement after snapping, thus ensuring a reliable structure. A second mounting groove 103 is annularly provided on the fan casing 1 for mounting the rotor frame 51. The rotor frame 51 is securely installed in the mounting slot 104. A locking block 105 is provided on the fan housing 1, and a locking groove 511 corresponding to the locking block 105 is provided on the rotor frame 51. When the rotor frame 51 is installed in the second mounting slot 104, the locking block 105 falls into the locking groove 511 and engages. The locking block limits the rotor frame 51 and prevents the rotor frame 51 from accidentally coming out of the second mounting slot 104. The rotor frame 51 is securely and reliably installed. The locking block 105 is provided with a guide slope 106 to facilitate the insertion of the rotor frame 51 into the second mounting slot 104, reducing the assembly difficulty.

[0026] See Figures 1-3 A rotating shaft 6 is provided on the fan housing 1. The central axis of the rotating shaft 6 coincides with the central axis of the impeller 3. The rotating shaft 6 is rotatably mounted on the fixing member 2. A bearing 7 is provided between the rotating shaft 6 and the fixing member 2 to ensure smooth rotation between the rotating shaft 6 and the fixing member 2. In this embodiment, two bearings 7 are provided along the axial direction of the rotating shaft 6. The fan housing 1 includes a connecting plate 11, and the impeller 3 includes several fan blades 31. One end of the fan blades 31 is integrally formed with the connecting plate 11, so that the fan housing 1 and the fan blades 31 can rotate synchronously. The rotation of the fan blades 31 generates wind power.

[0027] See Figures 2-4 The connecting plate 11 is provided with protruding posts 8, including a first protruding post 81 and a second protruding post 82. The first protruding post 81 is formed on the side of the connecting plate 11 near the impeller 3, and the second protruding post 82 is formed on the side of the connecting plate 11 away from the impeller 3. A through hole 80 for installing the rotating shaft 6 is provided through the inner side of the protruding post 8. The extension length of the through hole 80 is increased by the first protruding post 81 and the second protruding post 82, which increases the contact area between the hole wall of the through hole 80 and the rotating shaft 6, making the connection between the rotating shaft 6 and the fan housing 1 more stable. One end of the rotating shaft 6 is inserted into... Inside the through hole 80, the other end of the rotating shaft 6 is connected to the bearing 7. The first protrusion 81 is provided with an air guide arc surface 811 in an annular shape. The impeller 3 is provided with an air outlet 32. The air guide arc surface 811 is used to guide the airflow generated by the rotation of the fan blade 31 to the air outlet 32 ​​to blow it out, making the airflow smoother and improving the wind power. The rotating shaft 6 is provided with a limiting ring 61. The limiting ring 61 is placed on the side of the bearing 7 away from the through hole 80. The limiting ring 61 is used to limit the axial position between the bearing 7 and the rotating shaft 6 to prevent the bearing 7 from accidentally disengaging from the rotating shaft 6.

[0028] The compact fan structure of this utility model features an impeller and fan housing integrally molded, resulting in a simpler and more compact structure, smaller overall fan size, less space occupation, and lower production costs. This compact fan structure reduces the overall size of the hair trimmer, making it easier to handle and carry. The inner wall of the cavity is provided with protrusions, each with a first mounting groove for installing a permanent magnet. The permanent magnet is securely engaged in the first mounting groove, preventing displacement and ensuring structural reliability. When the rotor frame is inserted into the second mounting groove, a locking block falls into the groove and engages, limiting the rotor frame and preventing it from accidentally dislodging from the second mounting groove, ensuring a stable and reliable rotor frame installation. The first and second protrusions increase the extension length of the through hole, increasing the contact area between the through hole wall and the rotating shaft, making the connection between the rotating shaft and the fan housing more secure. The first protrusion has a ring-shaped air-guiding arc surface, making the airflow smoother and increasing the airflow force.

[0029] In addition, this utility model also provides a hair trimmer, including the above-mentioned compact fan structure. This hair trimmer also has the same beneficial effects of the above-mentioned compact fan structure, which will not be described in detail here.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A compact fan structure suitable for mounting on a hair trimmer, characterized in that, The compact fan structure includes a fan housing (1) and a fixing member (2) rotatably connected to each other. An impeller (3) is provided on the side of the fan housing (1) away from the fixing member (2). The fixing member (2) is adapted to be connected to the components on the hair trimmer. The impeller (3) is integrally formed with the fan housing (1). A stator (4) is provided on the fixing member (2). An inner cavity (101) is provided inside the fan housing (1). The stator (4) is placed in the inner cavity (101). A rotor (5) is provided on the inner wall of the inner cavity (101). The stator (4) is placed inside the rotor (5). During operation, the rotor (5) rotates relative to the stator (4). The rotor (5) drives the fan housing (1) and the impeller (3) to rotate synchronously.

2. The compact fan structure according to claim 1, characterized in that, The stator (4) is provided with a winding groove (41) for winding wires to form a winding; the rotor (5) includes an annular rotor frame (51) and a permanent magnet (52) disposed on the rotor frame (51); when the wire is energized, the rotor (5) drives the fan housing (1) to rotate relative to the stator (4).

3. The compact fan structure according to claim 2, characterized in that, The rotor frame (51) is circular, and the central axis of the rotor frame (51), the central axis of the stator (4), and the central axis of the impeller (3) coincide.

4. The compact fan structure according to claim 2, characterized in that, The permanent magnets (52) are provided in multiple ways, and the multiple permanent magnets (52) are distributed in a ring with equal spacing.

5. The compact fan structure according to claim 2, characterized in that, The inner wall of the inner cavity (101) is provided with a protrusion (102), and the protrusion (102) is provided with a first mounting groove (103) for mounting the permanent magnet (52).

6. The compact fan structure according to claim 2, characterized in that, The fan housing (1) is provided with a second mounting groove (104) for mounting the rotor frame (51) in a ring. The fan housing (1) is provided with a locking block (105). The rotor frame (51) is provided with a locking groove (511) that engages with the locking block (105). The locking block (105) is provided with a guide slope (106) to facilitate the insertion of the rotor frame (51) into the second mounting groove (104).

7. The compact fan structure according to claim 1, characterized in that, A rotating shaft (6) is provided on the fan housing (1). The central axis of the rotating shaft (6) coincides with the central axis of the impeller (3). The rotating shaft (6) is rotatably mounted on the fixing member (2). A bearing (7) is provided between the rotating shaft (6) and the fixing member (2).

8. The compact fan structure according to claim 7, characterized in that, The fan housing (1) includes a connecting plate (11), and the impeller (3) includes a plurality of fan blades (31), one end of which is integrally formed with the connecting plate (11).

9. The compact fan structure according to claim 8, characterized in that, The connecting plate (11) is provided with a protruding post (8), which includes a first protruding post (81) and a second protruding post (82). The first protruding post (81) is formed on the side of the connecting plate (11) close to the impeller (3), and the second protruding post (82) is formed on the side of the connecting plate (11) away from the impeller (3). A through hole (80) for installing the rotating shaft (6) is provided through the inner side of the protruding post (8). One end of the rotating shaft (6) is inserted into the through hole (80), and the other end of the rotating shaft (6) is connected to the bearing (7). A guide arc surface (811) is provided on the first protruding post (81), and an air outlet (32) is provided on the impeller (3). The guide arc surface (811) is used to guide the airflow generated by the rotation of the fan blade (31) to the air outlet (32) and blow it out.

10. A hair trimmer, characterized in that, Including the compact fan structure as described in any one of claims 1-9.

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