Nursing appliance

Abstract

This utility model discloses a nursing device, including a handle with a first fluid channel formed therein; a blower with a second fluid channel formed therein, the first and second fluid channels communicating with each other; a hinge assembly connecting the handle and the blower to allow the blower to switch between a straight and bent state relative to the handle; a fan assembly disposed within the first fluid channel; and a circuit board disposed within the first fluid channel and located downstream of the fan assembly along the fluid flow direction. The circuit board defines a first diversion channel and a second diversion channel, the flow cross-sectional area of ​​the first diversion channel being larger than that of the second diversion channel. This nursing device, according to embodiments of this utility model, can provide strong and uniform airflow in various operating states to meet diverse user needs.

Description

Technical Field

[0001] This utility model relates to the field of nursing technology, and in particular to a nursing device. Background Technology

[0002] Currently, as users' needs for hair care and styling become increasingly diversified, the market demand for hair care appliances that can blow-dry from multiple angles has grown significantly.

[0003] However, most nursing devices on the market can only provide sufficient airflow at a fixed angle. Adjusting the airflow angle significantly reduces the airflow, thus affecting the nursing effect. Therefore, these products can only be used as single-function hair dryers and cannot effectively adapt to different usage scenarios or be used with various decorative accessories, severely limiting the product's practicality and user experience.

[0004] Therefore, there is an urgent need to provide an improved nursing device to meet the different nursing needs of users in various scenarios.

[0005] The background description is provided for the purpose of understanding the relevant technologies in this field and is not intended as an admission of prior art. Utility Model Content

[0006] This utility model aims to provide a nursing device, which may include:

[0007] A handle, wherein a first fluid channel is formed within the handle;

[0008] A ventilation duct, wherein a second fluid channel is formed inside the ventilation duct, and the first fluid channel is connected to the second fluid channel;

[0009] A hinge assembly connecting the handle and the air duct to allow the air duct to switch between a straight state and a bent state relative to the handle;

[0010] A fan assembly, wherein the fan assembly is disposed within the first fluid channel;

[0011] A circuit board, wherein the circuit board is disposed within the first fluid channel and is located downstream of the fan assembly along the fluid flow direction;

[0012] The circuit board defines a first diversion channel and a second diversion channel, wherein the cross-sectional area of ​​the first diversion channel is larger than that of the second diversion channel.

[0013] In some embodiments, when the air duct is in the bent state relative to the handle, the first diversion channel is located on the side of the plate away from the air outlet; the second diversion channel is located on the side of the plate facing the air outlet.

[0014] In some embodiments, the plate has a first plate surface adjacent to the first diversion channel and a second plate surface adjacent to the second diversion channel, wherein the maximum height of the electrical components mounted on the first plate surface is less than the maximum height of the electrical components mounted on the second plate surface.

[0015] In some embodiments, the electrical components include at least an electrolytic capacitor and a transformer, the electrolytic capacitor and the transformer being disposed on the second plate.

[0016] In some embodiments, the plate is configured such that its plane forms a predetermined angle with the plane formed by the handle's central axis and the air duct's central axis in the bent state.

[0017] In some embodiments, the plate is configured such that its plane is perpendicular to the plane formed by the central axis of the handle and the central axis of the air duct in the bent state.

[0018] In some embodiments, the plate is configured such that its plane is offset relative to the central axis of the handle toward the air outlet side of the duct in the bent state.

[0019] In some embodiments, the hinge assembly includes:

[0020] A handle hinge, the handle hinge being located on the handle;

[0021] A duct hinge is located on the duct, and a handle hinge cooperates with the duct hinge to form a through hole connecting the first fluid channel and the second fluid channel.

[0022] In some embodiments, the hinge assembly further includes:

[0023] A flow guide disposed within the through hole is used to guide fluid from the first fluid channel to the second fluid channel.

[0024] In some embodiments, the flow guide includes an arcuate plate configured to guide airflow in the direction of airflow.

[0025] In some embodiments, the air guide is connected to the air duct hinge and switches between a first state and a second state as the bending angle of the air duct relative to the handle changes, wherein,

[0026] In the first state, the arc-shaped plate and the second diversion channel are located on the same side of the plane where the plate body is located, and do not cross the plane where the plate body is located, thereby guiding the fluid from the first fluid channel into the second fluid channel;

[0027] In the second state, at least a portion of the arc-shaped plate is located on the same side of the plane where the first diversion channel is located, and at least another portion extends beyond the plane where the plate is located, thereby guiding the flow from the first fluid channel to flow into the second fluid channel.

[0028] In some embodiments, the guide member further includes an overlapping section spaced apart from the arc-shaped plate, wherein the length extension direction of the overlapping section is parallel to the length extension direction of the arc-shaped plate.

[0029] In some embodiments, a plurality of partition plates are provided between the arc-shaped plate and the overlapping section, and the plurality of partition plates divide the channel between the arc-shaped plate and the overlapping section into a plurality of sub-channels.

[0030] In some embodiments, the cross-sectional area of ​​the overlapping section in a section perpendicular to the fluid flow direction is smaller than the cross-sectional area of ​​the arc-shaped plate.

[0031] In some embodiments, an arcuate segment is formed between adjacent partition plates and overlapping sections, the opening of the arcuate segment facing the first fluid channel.

[0032] The nursing device according to this utility model optimizes the electrical connection path by placing the circuit board downstream of the fan assembly. It also innovatively utilizes the circuit board to define two flow channels on opposite sides of the fluid channel in the handle, with one flow channel having a significantly larger cross-sectional area than the other. This ensures that, when the device is bent, the flow channel with higher flow rate is opposite the air outlet of the fan duct on the circuit board, allowing the main airflow to form a large-radius curved flow path. This avoids sharp turns caused by direct impact of the airflow onto the inner wall of the fan duct, significantly reducing local pressure loss, energy dissipation, and turbulence during airflow turning in the bent state. Therefore, even in a bent state, the nursing device of this utility model maintains a high wind speed and airflow output comparable to its straight state, with more uniform airflow distribution and significantly reduced airflow noise, improving the user experience in different usage modes.

[0033] Other optional features and technical effects of the embodiments of this utility model are partly described below and partly apparent from reading this document. Attached Figure Description

[0034] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The elements shown are not limited to the scale shown in the drawings, and the same or similar reference numerals in the drawings denote the same or similar elements, wherein:

[0035] Figure 1 This is a first exemplary structural perspective view of the nursing device according to an embodiment of the present invention in a cylindrical state;

[0036] Figure 2 This is a second exemplary structural perspective view of the nursing device according to an embodiment of the present invention in a straight cylindrical state;

[0037] Figure 3 This is a third exemplary structural perspective view of the nursing device according to an embodiment of the present utility model in a straight cylindrical state, wherein the handle housing has been removed to show the internal structure of the handle;

[0038] Figure 4 This is an exemplary structural side view of the nursing device according to an embodiment of the present invention in a cylindrical state, wherein the handle housing has been removed to show the internal structure of the handle;

[0039] Figure 5 This is a first exemplary side cross-sectional view of the nursing device according to an embodiment of the present invention in a straight cylindrical state;

[0040] Figure 6 This is an exemplary structural perspective view of the circuit board of a nursing device according to an embodiment of the present utility model;

[0041] Figure 7 This is an exemplary structural side view of the circuit board of a nursing device according to an embodiment of the present utility model;

[0042] Figure 8 This is an exemplary cross-sectional view of the handle of a nursing device according to an embodiment of the present invention, showing the circuit board on which the handle is mounted;

[0043] Figure 9 This is an exemplary structural perspective view of a nursing device in a bent state according to an embodiment of the present utility model;

[0044] Figure 10 This is a first exemplary side sectional view of a nursing device according to an embodiment of the present invention in a bent state, showing the hinge assembly within the nursing device;

[0045] Figure 11 This is a second exemplary side cross-sectional view of the nursing device according to an embodiment of the present invention in a bent state;

[0046] Figure 12 This is an exemplary structural perspective view of the guide component of a nursing device according to an embodiment of the present utility model;

[0047] Figure 13 This is an exemplary side cross-sectional view of a flow guide of a nursing device according to an embodiment of the present utility model;

[0048] Figure 14This is a second exemplary cross-sectional view of a nursing device according to an embodiment of the present invention in a straight cylindrical state, wherein a guide member according to an embodiment of the present invention is provided;

[0049] Figure 15 This is a third exemplary cross-sectional view of a nursing device according to an embodiment of the present invention in a bent state, wherein a guide member according to an embodiment of the present invention is provided.

[0050] Figure label:

[0051] 100. Nursing equipment;

[0052] 10. Handle; 11. First fluid channel; 12. Handle housing; 13. Air inlet; 14. Button assembly; 15. Unlocking assembly; 16. Handle central axis;

[0053] 20. Air duct; 21. Second fluid channel; 22. Air duct outer shell; 23. Air outlet; 24. Functional components; 25. Air duct central axis;

[0054] 30. Hinge assembly; 31. Handle hinge; 32. Air duct hinge; 33. Through hole; 331. Rotation axis; 34. Air guide; 341. Curved plate; 342. Overlap section; 343. Divider plate; 344. Curved section; 345. Buckle;

[0055] 40. Fan components;

[0056] 50. Circuit board; 51. Board body; 511. First board surface; 512. Second board surface; 52. First shunt channel; 53. Second shunt channel; 54. Electrical components; 54'. Electrolytic capacitor; 54”. Transformer;

[0057] L1, curved flow channel. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0059] In this embodiment of the invention, unless otherwise explicitly stated, the terms "upstream" and "downstream" should be understood as terms referring to the relative positional relationship based on the direction of fluid flow. Specifically, taking the flow path of the fluid in the nursing device as a reference, along the flow direction of the fluid from the air inlet to the air outlet, the side closer to the air inlet is defined as "upstream," and the side closer to the air outlet is defined as "downstream." Furthermore, the term "straight cylinder state" refers to a structural state in which the air cylinder and the handle's central axis coincide or are arranged approximately parallel, while "bent state" refers to a structural state in which the air cylinder and the handle's central axis form a predetermined angle.

[0060] As mentioned earlier, existing nursing devices can generally only provide sufficient airflow at a fixed angle. Adjusting the airflow angle will significantly reduce the airflow, especially for flexible nursing devices. When flexible, they generally suffer from a significant reduction in airflow performance, which manifests as a decrease in wind speed, a reduction in effective airflow, and uneven airflow distribution. Their function in the flexible state is severely limited, and they cannot provide good nursing effects for users when combined with different shape accessories.

[0061] To address this, this utility model provides a nursing device 100 that can provide strong and uniform airflow in various operating states. (Reference) Figures 1 to 15 The image shows a nursing appliance 100 according to an embodiment of this application.

[0062] In some embodiments of this utility model, the nursing device 100 may include a handle 10, a blower 20, a hinge assembly 30, a fan assembly 40, and a circuit board 50. In this embodiment, reference... Figure 1 and Figure 2 The handle 10 may have an external shape suitable for user grip, see reference. Figure 4 The handle 10 can accommodate a fan assembly 40 and a circuit board 50, wherein the fan assembly 40 can be used to generate airflow, the air duct 20 can be used to output airflow, and the circuit board 50 can be used to control the electrical functions of the care appliance 100.

[0063] In some embodiments of this utility model, reference is made to Figure 4 and Figure 5 A first fluid channel 11 is formed within the handle 10, and a second fluid channel 21 is formed within the air duct 20. A hinge assembly 30 is respectively disposed on the handle 10 and the air duct 20 to connect the handle 10 and the air duct 20. Thus, the first fluid channel 11 formed within the handle 10 and the second fluid channel 21 formed within the air duct 20 are connected, allowing airflow from the first fluid channel 11 to flow into the second fluid channel 21. In some embodiments, the cross-sections of the handle 10 and the air duct 20 along the airflow direction are, but are not limited to, circular or elliptical shapes; this embodiment of the present invention does not impose such limitations.

[0064] In some embodiments, the first fluid channel 11 may be connected to the outside via the air inlet 13 of the handle 10, thereby facilitating the entry of external fluids, such as airflow, into the first fluid channel 11 and flowing through the hinge assembly 30 into the second fluid channel 21. The second fluid channel 21 may be connected to the outside via the air outlet 23 of the duct 20, thereby facilitating the flow of fluids within the second fluid channel 21, such as heated airflow, to the outside.

[0065] In some embodiments of this utility model, in conjunction with reference to the reference Figure 5 and Figure 10 The hinge assembly 30 between the handle 10 and the air duct 20 is also configured to allow the air duct 20 to switch between a straight state and a bent state relative to the handle 10 by means of the hinge assembly 30. In this embodiment, in the straight state, the length extension directions of the air duct 20 and the handle 10 are substantially parallel, and in the bent state, the length extension directions of the air duct 20 and the handle 10 are at a predetermined angle. The specific structure of the hinge assembly 30 will be described in detail below.

[0066] In some embodiments of this utility model, the first fluid channel 11 can be integrally formed by the handle 10; similarly, the second fluid channel 21 can be integrally formed by the air duct 20. In some embodiments, such as Figure 5 As shown, the hinge assembly 30 forms a through hole 33 between the handle 10 and the air duct 20 (in Figure 5 (Schematally shown in a rectangular box), airflow from the first fluid channel 11 can flow into the second fluid channel 21 through the through-hole 33. In an alternative embodiment, the first fluid channel 11 and / or the second fluid channel 21 may be partially formed by the hinge assembly 30, which will be described below.

[0067] In some embodiments of this utility model, reference is made to Figure 4 A fan assembly 40 and a circuit board 50 may be installed in the first fluid channel 11; Reference Figure 5 The second fluid channel 21 may be provided with functional devices 24, including but not limited to heating components, negative ion generating components, fragrance components, lighting components, etc. In some embodiments, the fan assembly 40 may be fixed inside the first fluid channel 11 by screws or snap-fit ​​structures, and optionally, an annular airflow channel may be left with the inner wall of the first fluid channel 11.

[0068] In some embodiments, the circuit board 50 is electrically connected to the fan assembly 40, thereby enabling the circuit board 50 to control the fan assembly 40 to introduce outside air from the air inlet 13 into the first fluid channel 11. Similarly, the circuit board 50 is electrically connected to the functional device 24, thereby enabling the circuit board 50 to control the functional device 24 to perform operations on the fluid in the second fluid channel 21, including but not limited to heating. In this embodiment, the electrical connection is, for example, via a cable. In an optional embodiment, the cable may be covered with a flexible protective sleeve to enhance its torsional resistance.

[0069] In some embodiments of this utility model, reference is made to Figure 4 and Figure 5 The circuit board 50 is located downstream of the fan assembly 40 along the fluid flow direction. In other words, the circuit board 50 is positioned closer to the connection between the air duct 20 and the handle 10, for example, closer to the aforementioned through hole 33, compared to the fan assembly 40. Thus, the external airflow, driven by the fan assembly 40, first passes through the fan assembly 40 and then flows through the first fluid channel 11 and across the circuit board 50. This arrangement of the circuit board 50 and the fan assembly 40 in this embodiment of the invention has significant advantages over some known solutions. In contrast, by placing the circuit board 50 downstream of the fan assembly 40, this embodiment of the invention achieves a shorter electrical connection path between the circuit board 50, the fan assembly 40, and the functional components 24 within the air duct 20, reducing the complexity of inter-component connections, optimizing the internal space utilization of the handle 10, reducing signal transmission loss, and improving the overall reliability and service life of the product.

[0070] In some embodiments of this invention, the fluid distribution within the handle 10 is also optimized for the arrangement of the circuit board 50 downstream of the fan assembly 40. In some embodiments, reference is made to... Figure 4 The circuit board 50, disposed within the first fluid channel 11, has a plate body 51. The plate body 51 generally defines a first diversion channel 52 and a second diversion channel 53 located on opposite sides of the plate body 51 within the first fluid channel 11. Thus, fluid flowing upstream of the circuit board 50 through the plate body 51 is generally divided into two streams by the plate body 51, and flows downstream of the circuit board 50 through the first diversion channel 52 and the second diversion channel 53, respectively. By placing the plate body 51 within the first fluid channel 11, this embodiment of the invention achieves reasonable guidance of the upstream airflow, diverting the upstream airflow into two streams that flow downstream through the first diversion channel 52 and the second diversion channel 53, respectively. This not only improves the guidance and uniformity of the airflow but also reduces turbulence and localized airflow accumulation. This airflow structure design facilitates the smooth transfer of heat and gas within the system and effectively improves heat dissipation around the circuit board 50, ensuring the stability and reliability of the circuit board during operation.

[0071] In some embodiments, the plate 51 is configured such that its plane, in the bent state, forms a predetermined angle with the plane jointly defined by the handle central axis 16 of the handle 10 and the air duct central axis of the air duct 20. In this embodiment, the predetermined angle is, for example, in the range of 80° to 100°, and optionally in the range of 85° to 95°. In some embodiments, reference... Figure 10 and Figure 11 The plate 51 is configured such that its plane, when bent, is perpendicular to the plane jointly defined by the handle center axis 16 of the handle 10 and the air duct center axis 25 of the air duct 20. Specifically, when the nursing device 100 is bent, the handle 10 and the air duct 20 form a "7" shape, thereby defining the overall plane of the nursing device 100 together with the handle center axis 16 and the air duct center axis 25. The plane of the plate 51 of the circuit board 50 is configured to be substantially perpendicular to this overall plane, that is, the plane of the plate 51 is configured to be at a 90° angle to the overall plane of the nursing device 100. Thus, the plate 51 can effectively divide the nearby first diversion channel 52 into a first diversion channel 52 and a second diversion channel 53 located on opposite sides of the plate 51. This embodiment of the invention, by positioning the nursing device 100 in a "7"-shaped bent state, further configures the plate 51 to be substantially perpendicular to the overall nursing device plane defined by the handle's central axis 16 and the air duct's central axis 25. This achieves spatial coordination and matching between the circuit board and the overall structure, ensuring good fluid distribution even when the circuit board is bent, and guaranteeing airflow control and heat dissipation efficiency around the circuit board during multi-angle use. Simultaneously, this structural layout enhances the overall stability of the device and the versatility of the modules, simplifies assembly, and facilitates maintenance.

[0072] In some embodiments of this utility model, in conjunction with reference to the reference Figure 4 , Figure 5 and Figure 8The circuit board 50 is configured such that the cross-sectional area of ​​the first diversion channel 52 is larger than that of the second diversion channel 53, thereby forming an asymmetric flow channel structure. This results in a greater fluid flow rate through the first diversion channel 52 than through the second diversion channel 53. In this embodiment, the "cross-sectional area" refers to the effective flow cross-section area of ​​the first diversion channel 52 and the second diversion channel 53 on a plane perpendicular to the fluid flow direction, i.e., perpendicular to the handle's central axis 16. This embodiment of the invention forms an asymmetric airflow channel structure by making the cross-sectional area of ​​the first diversion channel 52 larger than that of the second diversion channel 53. This asymmetry allows the first diversion channel 52 to carry most of the airflow within the handle. This structural design not only optimizes the airflow path in a straight-tube state but also provides a hydrodynamic basis for the nursing device in various working postures, ensuring that the main airflow flows along the desired path and reducing airflow energy loss. At the same time, this design also enables targeted enhanced heat dissipation in different areas of the circuit board, and helps to achieve targeted airflow cooling for various electrical components based on the differences in heat source distribution on the circuit board. It also improves the heat dissipation efficiency and responsiveness of the airflow system, further ensuring the stability of the airflow output and electrical performance of the nursing appliances, and giving the nursing appliances greater design flexibility and the potential for differentiated functional configurations.

[0073] In some embodiments, the flow cross-section can be characterized by the cross-sectional area obtained by cutting the first diversion channel 52 and the second diversion channel 53 in a plane orthogonal to the handle's central axis 16. The measured area of ​​the flow cross-section can be used to characterize the size of the space through which fluid can pass at that location. In one specific embodiment, refer to... Figure 8 The circuit board 50 is configured such that the flow cross-sectional area S1 of the first diversion channel 52 is significantly larger than the flow cross-sectional area S2 of the second diversion channel 53. In some embodiments, the ratio of the minimum flow cross-sectional area S1 of the first diversion channel 52 to the minimum flow cross-sectional area S2 of the second diversion channel 53 is greater than 1.9, optionally greater than 2.0, and preferably greater than 2.2.

[0074] In some embodiments of this utility model, reference is made to Figure 10 and Figure 11 When the air duct 20 is bent relative to the handle 10, the first diversion channel 52 and the air outlet 23 of the air duct 20 are located on opposite sides of the plate 51, that is, the first diversion channel 52 is located on the side of the plate 51 away from the air outlet 23; the second diversion channel 53 and the air outlet 23 of the air duct 20 are located on the same side of the plate 51, that is, the second diversion channel 53 is located on the side of the plate 51 facing the air outlet 23. Specifically, as shown... Figure 11As shown, when the nursing device 100 is in a bent state, the air outlet 23 of the air duct 20 faces to the left. At this time, the first diversion channel 52 with a larger flow rate is located on the side of the plate 51 away from the air outlet 23, that is, the right side of the plate 51, while the second diversion channel 53 with a smaller flow rate is located on the side of the plate 51 facing the air outlet 23, that is, the left side of the plate 51.

[0075] In some embodiments, as previously described, the circuit board 50 is configured such that the cross-sectional area of ​​the first diversion channel 52 is larger than the cross-sectional area of ​​the second diversion channel 53, thus the first diversion channel 52 carries most of the airflow within the handle 10. Therefore, referring to... Figure 11 When the airflow flows from the first fluid channel 11 inside the handle 10 to the hinge assembly 30 and then turns to enter the air duct 20, the first diversion channel 52 (high-flow diversion channel) and the air outlet 23 are located on opposite sides of the plate 51, that is, the first diversion channel 52 is located on the right side of the plate 51. This causes a large amount of airflow flowing out from the diversion channel to form a curved flow channel L1 with a large radius during the turning process. Meanwhile, the second diversion channel 53 (low-flow diversion channel) and the air outlet 23 are located on the same side of the plate 51, and a small amount of airflow in it forms a curved flow channel with a smaller radius. This embodiment of the present invention, combined with the above-mentioned asymmetric diversion structure, makes the flow cross-sectional area of ​​the first diversion channel 52 larger than that of the second diversion channel 53. Thus, the first diversion channel 52 carries most of the airflow inside the handle. Furthermore, combined with the layout of the first diversion channel 52 relative to the air outlet direction of the air duct, the main airflow naturally enters the large-radius first diversion channel 52, and the small airflow enters the small-radius second diversion channel 53, thereby realizing the reasonable guidance and zoned management of the main and secondary airflows. This design avoids the high resistance and fluid impact caused by large-volume main airflow passing through sharp turns, improves the overall system's fluid dynamic coordination and adaptability in bending states, and also provides a more uniform airflow source at the air duct outlet through this rational planning of the fluid path, reduces eddies and lateral airflow disturbances, and improves the stability of the airflow ejected from the nursing equipment.

[0076] In this embodiment, the arrangement of the first diversion channel 52 and the air outlet 23 on opposite sides of the plate 51 achieves advantageous fluid dynamics: by placing the first diversion channel 52, which carries the main airflow, at a position forming a large-radius bend, it is ensured that most of the airflow can flow through the large-radius curved channel L1. Compared to a small-radius sharp bend, the large-radius curved channel effectively reduces the local pressure loss and energy dissipation when most of the airflow from the first diversion channel 52 turns into the second fluid channel 53, reduces fluid noise, and improves overall fluid efficiency, thereby enhancing the overall performance of the equipment, especially increasing the wind speed and airflow within the duct 20 and the air outlet 23 in the bend state. In this embodiment, since the main airflow has less flow loss and a lower local pressure gradient through the path of the large-radius bend, this structural design, combined with the linkage between the fan assembly and the air outlet structure, improves the overall aerodynamic efficiency of the machine. This efficient structural design enables the nursing device to achieve high wind speed and high air volume output even when bent. At the same time, the large-radius flow channel effectively reduces turbulence intensity and fluid noise caused by sharp airflow bends, balancing high air volume and low noise, significantly improving the user experience and enhancing the overall performance of the nursing device.

[0077] In some embodiments of this utility model, in conjunction with reference to the reference Figures 3 to 8 The asymmetric flow channel structure of the first diversion channel 52 and the second diversion channel 53 can be formed by the arrangement of power-on components 54 on the circuit board 50, especially the board body 51.

[0078] In some embodiments, the board body 51 of the circuit board 50 may have a first board surface 511 adjacent to the first diversion channel 52 and a second board surface 512 adjacent to the second diversion channel 53.

[0079] In this embodiment, the first plate surface 511 and the second plate surface 512 may provide mounting positions for a plurality of electrical components 54. In some embodiments, the electrical components 54 may include small electronic devices operating at low voltage (e.g., below 36V) and larger electrical devices operating at relatively high voltage (e.g., above 36V). In some embodiments, reference Figure 6 and Figure 7 The circuit board 50 is configured such that the maximum height of the electrical components 54 mounted on the first board surface 511 is less than the maximum height of the electrical components 54 mounted on the second board surface 512. In an alternative embodiment, the ratio of the maximum height of the electrical components mounted on the second board surface 512 to the maximum height of the electrical components mounted on the first board surface 511 is greater than 1.9, preferably greater than 2.0, and more preferably greater than 2.2. In some embodiments, reference is made to... Figure 6 and Figure 7Large electrical devices with higher height, such as transformer 54” and electrolytic capacitor 54’, are disposed on the second board surface 512, while small electronic devices with lower height, such as surface mount devices (SMD), such as chip resistors, chip capacitors, low-profile integrated circuit chips, are disposed on the first board surface 511.

[0080] Thus, through this differentiated layout, the first diversion channel 52 formed between the first plate 511 and the inner wall of the handle 10 has a larger flow cross-sectional area, while the large components mounted on the second plate 512 effectively utilize the space on one side of the second diversion channel 53. This design makes full use of the limited internal space of the handle, achieving a reasonable layout of the airflow channels while ensuring the normal deployment of circuit functions. Specifically, by placing large-volume components on the side of the low-flow channel, the flow cross-sectional area of ​​the second diversion channel 53 is correspondingly reduced, thereby avoiding obstruction of the main airflow path by these large-volume components and improving the unobstructed flow of the first diversion channel 52 that carries the main airflow, thus maintaining a high fluid velocity and flow rate even when bent.

[0081] In some embodiments of this utility model, reference is made to Figure 5 The circuit board 50 can also adopt an offset mounting structure, that is, the plane of the board body 51 of the circuit board 50 does not coincide with the central axis 16 of the handle, thereby further increasing the flow cross-sectional area of ​​the first diversion channel 52. In some embodiments, reference Figure 5 The circuit board 50 can be offset a certain distance relative to the handle's central axis 16 towards the second diversion channel 53. It should be understood that this offset mounting structure is preferably implemented while keeping the outer diameter of the handle 10 unchanged. That is, within the predetermined external size constraints of the handle 10, by offsetting the circuit board 50 towards one side of the second diversion channel 53 (the opposite side of the first diversion channel 52), the first diversion channel 52 gains additional space, thereby maximizing the effective cross-sectional area of ​​the main airflow channel without affecting the user's grip comfort and appearance, and further reducing fluid resistance and flow noise.

[0082] In some embodiments of this invention, as previously described, the hinge assembly 30 between the handle 10 and the air duct 20 is also configured to allow the air duct 20 to switch between a straight state and a bent state relative to the handle 10 by means of the hinge assembly 30. In some embodiments, the hinge assembly 30 is hermetically connected to the handle 10 and the air duct 20.

[0083] In some embodiments, Figure 10 and Figure 11The hinge assembly 30 may include a handle hinge 31 and a duct hinge 32. The handle hinge 31 connects to the handle 10, and the duct hinge 32 connects to the duct 20. The handle hinge 31 and the duct hinge 32 cooperate to form a through hole 33 communicating between the first fluid channel 11 and the second fluid channel 21. This through hole 33, in reference... Figure 10 and Figure 11 The dashed box schematically shows that airflow from the first fluid channel 11, such as from the aforementioned first diversion channel 52 and second diversion channel 53, can be diverted through the through hole 33 to flow into the second fluid channel 21.

[0084] In some embodiments of this invention, the hinge assembly 30 is configured as a mechanical rotating structure connecting the handle 10 and the air duct 20, used to realize the state switching function of the air duct 20 relative to the handle 10. In this embodiment, the hinge assembly 30 defines a predetermined axis of rotation 331, so that the air duct 20 can perform controlled angle switching between a straight state and a bent state around the axis of rotation 331 by means of the hinge assembly 30.

[0085] In some embodiments, when the air duct 20 is in a straight position relative to the handle 10, the length extension direction of the air duct 20 is parallel or substantially parallel to the length extension direction of the handle 10. In a specific example, refer to... Figures 1 to 5 When the hair dryer 20 is in a straight position relative to the handle 10, the central axis 25 of the hair dryer is approximately parallel to the central axis 16 of the handle. Thus, in this embodiment, the overall axial length of the care appliance 100 in the straight position is maximized and the radial dimension is minimized, which facilitates storage and the installation and use of the care appliance 100 with styling accessories, such as curling irons, straightening combs, etc.

[0086] In some embodiments of this utility model, when the air duct 20 is in a bent state relative to the handle 10, the length extension direction of the air duct 20 and the length extension direction of the handle 10 form a predetermined angle / angle. In some embodiments, reference Figures 9 to 11 When the air duct 20 is bent relative to the handle 10, the central axis 25 of the air duct and the central axis 16 of the handle 10 form a predetermined angle. In some embodiments, the predetermined angle is, for example, in the range of 75° to 105°, and optionally in the range of 85° to 95°. In one specific embodiment, refer to... Figure 11 The predetermined angle is 86°. Thus, the care device resembles a traditional hair dryer when bent, allowing the user to hold the care device 100 and use it with styling accessories such as styling nozzles and quick-drying nozzles.

[0087] In some embodiments of this utility model, the hinge assembly 30 is constructed as an independent structure separate from the handle 10 and the air duct 20, and is disposed at the connection interface between the first fluid channel 11 and the second fluid channel 21, thereby optimizing the internal space utilization of the handle 10 and the air duct 20, while minimizing the risk of interference with other structural components of the handle 10 and the air duct 20.

[0088] In some embodiments of this invention, the hinge assembly 30 can be completely integrated into the inner cavity of the handle 10 or the air duct 20. In this embodiment, when the hinge assembly 30 is integrated into the handle 10, its structure is adapted to the internal contour of the handle 10. Similarly, when the hinge assembly 30 is integrated into the air duct 20, its structure is adapted to the internal contour of the air duct 20, thereby reducing the overall size of the device and improving the structural integration. It should be understood that in some embodiments, a portion of the hinge assembly 30 can be integrated into the handle 10, while another portion is integrated into the air duct 20, forming a cross-sectional hinge structure.

[0089] In some embodiments of this utility model, a portion of the hinge assembly 30 is built into the handle 10 or the air duct 20, while the other portion is constructed as an independent component located at the connection interface between the handle 10 and the air duct 20.

[0090] The solutions of the above embodiments of this utility model can be combined or modified according to actual application needs. The hinge assembly 30 can be mechanically connected to the handle 10 and / or the air duct 20 as an independent structural module, or it can be formed into an integral structure with the handle 10 and / or the air duct 20 through an integrated molding process, thereby simplifying the manufacturing process and improving production efficiency. In some alternative embodiments, the first fluid channel 11 and / or the second fluid channel 21 may optionally be partially formed by the hinge assembly 30. In some embodiments, reference is made to... Figures 10 to 11 The hinge assembly 30 may be at least partially configured as a component of the first fluid channel 11 and / or the second fluid channel 12. In this embodiment, the handle hinge 31 may be configured to extend axially along the handle 10 and enter the interior of the handle 10, thereby forming a portion of the inner wall of the first fluid channel 11. Similarly, the duct hinge 32 may be configured to extend axially along the duct 20 and form a portion of the inner wall of the duct 20.

[0091] Therefore, in this embodiment, the inner wall of the fluid channel formed by the hinge assembly 30 can be molded to have a high surface finish to reduce fluid resistance and optimize aerodynamic characteristics, while facilitating the installation of other components in the gap area between the hinge assembly and the housing. In some embodiments, in conjunction with reference to... Figure 1 and Figure 5A button assembly 14 and an unlocking assembly 15 can be provided in the gap area between the hinge assembly 30 and the handle housing 12. A sensing element, for example, can also be provided in this gap area. In an optional embodiment, an interface component such as a display module can also be provided in this gap area without adversely affecting the integrity of the fluid channel. Furthermore, this structure simplifies the component assembly process, reduces the manufacturing complexity and cost of components such as the handle and / or the air duct housing, while improving the overall structural strength and service life of the product.

[0092] In some embodiments of this utility model, the cross-section of the through hole 33 of the hinge assembly 30 along the airflow direction is constructed to be circular or elliptical, and the internal space is defined by the circular / elliptical inner wall of the through hole 33, such as a cylindrical internal space with a certain height.

[0093] In some embodiments, a guide element 34 may be provided in the through hole 33 to improve the hydrodynamic performance of the airflow during flow and / or turning. This guide element 34 significantly reduces flow resistance by optimizing the airflow channel, making the change in airflow direction smoother. This reduces motor load and airflow disturbance, and by improving the fluid's movement direction, it optimizes the internal airflow organization, thereby contributing to improved wind power efficiency and operational stability. In some embodiments, the guide element 34 is entirely housed within the internal space defined by the through hole 33. This design, where the guide element 34 is enclosed within the internal space, not only avoids external contact damage but also does not increase the overall volume of the product, facilitating miniaturization.

[0094] In alternative embodiments, it may be advantageous to position the flow guide 34 at least partially within the fluid channel inside the handle 10 or the air duct 20. This bridging arrangement of the flow guide 34 creates an airflow channel bridging the air duct and the handle, resulting in a smoother airflow turning path between the handle and the air duct, reducing local airflow turbulence caused by sharp turns, and improving overall flow stability. Simultaneously, the flow guide 34 can guide the airflow to flow orderly throughout the entire internal space of the nursing device, improving airflow delivery efficiency. In some alternative embodiments of this invention, it should be understood that the flow guide may not be provided within the through hole 33.

[0095] In some embodiments, reference Figure 12 and Figure 13 The flow guide 34 is configured to include an arc-shaped plate 341 that guides the airflow along the direction of airflow. The arc-shaped flow guide facilitates a smooth transition of the airflow direction change, reducing flow loss. In this embodiment, the arc-shaped plate 341 has an arc-shaped cross-section perpendicular to the airflow direction and has a bottom end near the duct 20 and a head near the handle 10. In some embodiments, such as Figure 12As shown, the head is further configured to have a semi-circular profile facing the handle 10, thereby further reducing airflow resistance and unfavorable vortices when it contacts the head of the arc plate 341. The optimized flow path improves the gentleness and concentration of the exhaust air, and enhances the user experience.

[0096] In some embodiments of this utility model, reference is made to Figure 14 The air guide 34 is configured to connect to the air duct hinge 32 and rotates around the rotation axis 331 of the through hole 33 as the bending angle of the air duct 20 relative to the handle 10 changes. This configuration ensures that the overall airflow remains smoothly guided. Regardless of the rotation angle of the air duct, the air guide can automatically adjust its direction to adapt to the airflow path, maintaining smooth airflow guidance without significantly affecting airflow performance and ensuring the adaptability of the entire machine. In some embodiments, the air guide 34 may include one or more latches 345, which can be detachably engaged with corresponding protrusions on the air duct hinge 32, thereby detachably installing the air guide 34 onto the air duct hinge 32. In this embodiment, the latches 345 and the corresponding protrusions can be located outside the through hole 33, thereby avoiding intrusion into the space defined by the through hole 33, thus ensuring the guiding effect of the latches 345, through hole 33, and arc plate 341 on the airflow. However, it is understood that in some other embodiments, the guide member 34 may also be fixed to the air duct hinge member 32, for example by screwing or integrally formed with the air duct hinge member 32, which falls within the scope of this utility model.

[0097] In some embodiments, reference Figure 14 and 15 The airflow guide 34 can switch between a first state and a second state as the bending angle of the air duct 20 relative to the handle 10 changes, thereby achieving improved airflow guidance and / or direction in different working states of the nursing device 100, such as the aforementioned straight state and / or bent state. In this embodiment, the first state corresponds, for example, to the aforementioned straight state, and the second state corresponds, for example, to the aforementioned bent state.

[0098] In some embodiments, reference Figure 14 In the first state (corresponding to the straight state of the air duct 20 and the handle 10), the arc-shaped plate 341 and the second diversion channel 53 are located on the same side of the plane where the plate body 51 is located, and do not cross the plane where the plate body 51 is located. In this state, the arc-shaped plate 341 mainly plays the role of guiding the airflow, without causing significant disturbance to the airflow, so that the airflow from the first fluid channel 11 flows into the second fluid channel 21 while maintaining the general direction, thus maintaining the original kinetic energy and direction of the airflow.

[0099] In some embodiments, reference Figure 15In the second state (corresponding to the duct 20 and handle 10 being bent), at least a portion of the arc-shaped plate 341 is located on the same side of the plane where the plate body 51 is located, along with the first diversion channel 52, and at least another portion extends beyond the plane where the plate body 51 is located. In some embodiments, the area of ​​the arc-shaped cross-section of the portion of the arc-shaped plate 341 and the first diversion channel 52 located on the same side of the plane where the plate body 51 is located is significantly larger than the area of ​​the arc-shaped cross-section extending beyond the plane where the plate body 51 is located. In this state, the arc-shaped plate 341 mainly serves to guide the airflow to smoothly change direction, causing the airflow from the first fluid channel 11 to gradually turn at a preset angle along the arc surface of the arc-shaped plate 341 before flowing into the second fluid channel 21, rather than directly impacting the inner wall of the duct 20 and forming a sharp turn. Thus, the arc-shaped plate 341 optimizes the path of the airflow during turning, reduces wind speed, and reduces noise.

[0100] The arc-shaped plate 341 according to the embodiments of this utility model works in conjunction with the asymmetric flow channel design of the aforementioned circuit board 50. Specifically, in the bent state, the main airflow from the first diversion channel 52 (high-flow channel) meets the main body of the arc-shaped plate 341 and smoothly turns along its arc surface, forming a large-radius turning path. This significantly reduces energy loss and turbulence generation during the turning process. Even in the bent state, the nursing device 100 of this utility model maintains a strong blowing effect and wind speed, significantly improving the user experience during multi-mode use. Furthermore, the smooth airflow turning also reduces eddy current generation and turbulence noise, allowing the nursing device to maintain a low noise level during bending operations.

[0101] In some embodiments of this utility model, reference is made to Figure 12 and Figure 13The flow guide 34 can also be constructed as a three-dimensional flow guide and further include overlapping sections 342 spaced apart from the arc-shaped plate 341. The overlapping sections 342 are configured such that their length extension direction is approximately parallel to the length extension direction of the arc-shaped plate 341. This three-dimensional structural design has significant advantages over a single flow guide surface, enabling more complex and precise airflow guidance and effectively improving the orderliness and uniformity of airflow inside the duct. The formation of multiple flow guide zones by the arc-shaped plate and the overlapping sections helps to eliminate turbulence and backflow caused by local disturbances. In this embodiment, the overlapping section 342 can, for example, be used to provide physical support for the cable between the connecting handle 10 and the air duct 20, preventing the cable from dangling, swaying, wearing, or accidentally falling off, thus extending the cable's service life. In other embodiments, the overlapping section 342, in addition to providing structural support, enhances the mechanical stability of the overall component and also homogenizes airflow. As a secondary guide surface, the overlapping section reduces the low-pressure area behind the dominant arc-shaped plate, thereby reducing adverse aerodynamic phenomena (such as separation or backflow). The airflow velocity distribution guided by this multi-layered structure is more uniform, contributing to improved user comfort. In some embodiments, the cross-sectional area of ​​the arc-shaped plate 341 perpendicular to the fluid flow direction is significantly larger than the cross-sectional area of ​​the overlapping section 342. In optional embodiments, the ratio of the projected areas of the arc-shaped plate 341 and the overlapping section 342 along the fluid flow direction is greater than 3.5.

[0102] In some embodiments of this utility model, a plurality of partition plates 343 may be provided between the arc-shaped plate 341 and the overlapping section 342. The number of partition plates 343 may be, for example, two, and optionally three or four. In some embodiments, reference... Figure 12 and Figure 13 For example, the number of partitions 343 is 4.

[0103] In some embodiments, multiple partitions 343 divide the channel between the arcuate plate 341 and the overlapping section 342 into multiple sub-channels. The partitions 343 prevent airflow from the first fluid channel 11 from generating lateral flow and vortices within the space between the arcuate plate 341 and the overlapping section 342, ensuring smooth airflow along the designed path. In some embodiments, the partitions 343 are configured such that their width gradually decreases from the arcuate plate 341 to the overlapping section 342. In some embodiments, the electrical connections between the aforementioned functional device 24 and the circuit board 50, such as multiple cables, can pass through the multiple sub-channels, thereby preventing cable tangling and enhancing their torsional resistance, guiding wires and cables within the structure, reducing cable clutter, and improving product neatness and reliability. However, it is understood that in alternative embodiments, the multiple cables may also bypass the sub-channels, which falls within the scope of this invention.

[0104] In some embodiments of this utility model, reference is made to Figure 12 and Figure 13 An arc-shaped segment 344 may be formed between adjacent partition plates 343 and overlapping sections 342. In some embodiments, reference... Figure 12 and Figure 13 Three arcuate segments 344 can be formed between the partition plate 343 and the overlapping section 342, wherein the radius of curvature of the middle arcuate segment 344 is larger than that of the arcuate segments 344 on both sides. In this embodiment, the arrangement of the arcuate segments 344 helps to optimize the flow characteristics of the airflow entering the sub-channel, reduce pressure loss and turbulence generation at the inlet, and thus reduce noise levels.

[0105] This document describes several embodiments of the present invention. However, for the sake of brevity, the descriptions of the embodiments are not exhaustive, and identical or similar features or parts between the embodiments may be omitted. In this document, "one embodiment," "some embodiments," "example," "specific example," or "some examples" refer to at least one embodiment or example applicable to the present invention, but not all embodiments. The above terms do not necessarily mean referring to the same embodiment or example. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0106] In this document, it should be understood that, unless otherwise expressly defined, the directional terms such as “center,” “axial,” “radial,” “circumferential,” “longitudinal,” “lateral,” “length,” “width,” and “thickness,” as well as spatial position terms such as “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” and movement direction terms such as “clockwise” and “counterclockwise”, are all relative orientations or positional descriptions defined based on the specific posture and orientation of the device shown in the accompanying drawings, and do not imply or limit that the device or element must have a certain orientation or be constructed or operated in a certain posture. Therefore, they should not be construed as limitations on this utility model.

[0107] The exemplary systems and methods of this invention have been specifically shown and described with reference to the foregoing embodiments, and are merely examples of the best mode for implementing the systems and methods. Those skilled in the art will understand that various changes can be made to the embodiments described herein without departing from the spirit and scope of this invention as defined in the appended claims when implementing the systems and / or methods.

Claims

1. A nursing appliance, characterized in that, include: A handle, wherein a first fluid channel is formed within the handle; A ventilation duct, wherein a second fluid channel is formed inside the ventilation duct, and the first fluid channel is connected to the second fluid channel; A hinge assembly connecting the handle and the air duct to allow the air duct to switch between a straight state and a bent state relative to the handle; A fan assembly, wherein the fan assembly is disposed within the first fluid channel; A circuit board, wherein the circuit board is disposed within the first fluid channel and is located downstream of the fan assembly along the fluid flow direction; The circuit board defines a first diversion channel and a second diversion channel, wherein the cross-sectional area of ​​the first diversion channel is larger than that of the second diversion channel.

2. The nursing appliance according to claim 1, characterized in that, When the air duct is in the bent state relative to the handle, the first diversion channel is located on the side of the plate away from the air outlet; the second diversion channel is located on the side of the plate facing the air outlet.

3. The nursing appliance according to claim 1, characterized in that, The plate has a first plate surface adjacent to the first diversion channel and a second plate surface adjacent to the second diversion channel. The maximum height of the electrical components installed on the first plate surface is less than the maximum height of the electrical components installed on the second plate surface.

4. The nursing appliance according to claim 3, characterized in that, The electrical components include at least an electrolytic capacitor and a transformer, which are disposed on the second plate.

5. The nursing appliance according to claim 2, characterized in that, The plate is configured such that its plane forms a predetermined angle with the plane formed by the central axis of the handle and the central axis of the air duct in the bent state.

6. The nursing appliance according to claim 5, characterized in that, The plate is configured such that its plane is perpendicular to the plane formed by the central axis of the handle and the central axis of the air duct in the bent state.

7. The nursing appliance according to claim 5, characterized in that, The plate is configured such that its plane is offset relative to the central axis of the handle toward the air outlet side of the air duct in the bent state.

8. The nursing appliance according to any one of claims 1 to 7, characterized in that, The hinge assembly includes: A handle hinge, the handle hinge being located on the handle; A duct hinge is located on the duct, and a handle hinge cooperates with the duct hinge to form a through hole connecting the first fluid channel and the second fluid channel.

9. The nursing appliance according to claim 8, characterized in that, The hinge assembly also includes: A flow guide disposed within the through hole is used to guide fluid from the first fluid channel to the second fluid channel.

10. The nursing appliance according to claim 9, characterized in that, The flow guide includes an arc-shaped plate configured to guide airflow in the direction of airflow.

11. The nursing appliance according to claim 10, characterized in that, The air guide is connected to the air duct hinge and switches between a first state and a second state as the bending angle of the air duct relative to the handle changes. In the first state, the arc-shaped plate and the second diversion channel are located on the same side of the plane where the plate body is located, and do not cross the plane where the plate body is located, thereby guiding the fluid from the first fluid channel into the second fluid channel; In the second state, at least a portion of the arc-shaped plate is located on the same side of the plane where the first diversion channel is located, and at least another portion extends beyond the plane where the plate is located, thereby guiding the flow from the first fluid channel to flow into the second fluid channel.

12. The nursing appliance according to claim 10, characterized in that, The flow guide also includes an overlapping section spaced apart from the arc-shaped plate, the length extension direction of the overlapping section being parallel to the length extension direction of the arc-shaped plate.

13. The nursing appliance according to claim 12, characterized in that, Multiple partition plates are provided between the arc-shaped plate and the overlapping section, and the multiple partition plates divide the channel between the arc-shaped plate and the overlapping section into multiple sub-channels.

14. The nursing appliance according to claim 12, characterized in that, The cross-sectional area of ​​the overlapping section perpendicular to the fluid flow direction is smaller than the cross-sectional area of ​​the arc-shaped plate.

15. The nursing appliance according to claim 13, characterized in that, An arc-shaped segment is formed between adjacent partition plates and overlapping sections, and the opening of the arc-shaped segment faces the first fluid channel.

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