A switchable air direction neck fan with split fan assembly

Abstract

The application discloses a hanging neck fan with switchable air direction and a split fan assembly, which comprises a hanging neck body, a fan assembly and a locking mechanism; the fan assembly is hinged to two ends of the hanging neck body, and a plurality of air outlets are formed in the hanging neck body; the airflow output port of the fan assembly outputs airflow through the air outlets, or the fan assembly is rotated so that the airflow output port of the fan assembly is rotated to a position for blowing and wiping the face. The fan assembly of the application can be in sealed connection with the hanging neck body to output airflow from the air outlets on the hanging neck body, or the fan assembly can be rotated so that the fan assembly blows and wipes the face alone. When the fan assembly blows and wipes the face alone, the airflow output by the fan assembly does not need to pass through the air duct in the hanging neck body, so that the fan assembly has greater wind power to blow and wipe the face, and has good heat dissipation effect; and the whole process of using the hanging neck fan is that the hanging neck fan is hung on the neck, and the user does not need to hold the fan by hand, so that the hanging neck fan is flexible and convenient to use.

Description

A neck fan with a split-type fan assembly and switchable airflow direction Technical Field

[0001] This invention relates to a neck fan, and more particularly to a neck fan with a split-type fan assembly and switchable airflow direction. Background Technology

[0002] In summer, high outdoor temperatures often cause people to sweat profusely when outdoors. Therefore, many people carry portable fans. When using a fan, people hold it and direct it towards their head or body. However, this method requires holding the fan for extended periods, leaving the hands unused and inconvenient. To address this issue, neck fans were designed and have become popular. Existing neck fans consist of a neckband that hangs around the neck, a fan assembly housed within the neckband, a circuit board, and a battery. The neckband has multiple air outlets; during use, the fan assembly outputs airflow from these outlets, thus cooling the neck and / or head. However, this type of neck fan has the following drawbacks: 1. Because the airflow needs to pass through the air duct of the neck fan body before being output from the air outlet, the airflow is subject to resistance when flowing inside the neck fan body, resulting in a significant reduction in wind power; 2. The position of the air outlet cannot be adjusted, so users cannot choose to blow air onto their face according to their needs; 3. When the user holds the neck fan body and blows the airflow from the air outlet onto their face, the weak wind has a poor cooling effect on the face, and it requires holding the fan for a long time, making it extremely inconvenient to use and far from meeting the user's cooling needs. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems by providing a neck fan with a switchable airflow direction, offering flexibility and convenience in use. The fan assembly of this neck fan can be sealed to the neckband body, outputting airflow from the air outlet on the neckband body. Alternatively, the fan assembly can be rotated to direct airflow specifically towards the face. When the fan assembly is used to direct airflow towards the face, the airflow output by the fan assembly does not need to pass through the air ducts within the neckband body, resulting in a stronger airflow and better heat dissipation. Furthermore, the neck fan remains attached to the neck throughout use, eliminating the need for handheld operation, making it flexible and convenient to use.

[0004] The objective of this invention can be achieved using the following technical solutions:

[0005] A neck fan with a split-type fan assembly and switchable airflow direction includes a neck body, a fan assembly, and a locking mechanism for locking the position of the fan assembly; the fan assembly is hinged to both ends of the neck body, and the neck body has several air outlets; the airflow outlet of the fan assembly outputs airflow through the air outlets, or by rotating the fan assembly, the airflow outlet of the fan assembly is rotated to a position to blow air onto the face.

[0006] As a preferred embodiment, the fan assembly is slidably mounted on the end of the neckband body. After the fan assembly is slid away from the end of the neckband body, the airflow outlet of the fan assembly is rotated to a position where it blows air onto the face.

[0007] As a preferred embodiment, the fan assembly is hinged to the neckband body via a pin, the pin being perpendicular to the side of the end of the neckband body.

[0008] As a preferred embodiment, the neck hanger body has a guide groove, and the pin is slidably and rotatably sleeved in the guide groove.

[0009] As a preferred embodiment, the locking mechanism includes a first protrusion on the inner wall of the guide groove, the first protrusion dividing the guide groove into at least two clamping cavities, and the pin is clamped in the clamping cavity.

[0010] As a preferred embodiment, the locking mechanism includes a positioning groove on the neckband body, a positioning post on the side of the fan assembly, and a second protrusion for locking the positioning post; the positioning post is slidably and rotatably fitted into the positioning groove; at least two second protrusions are provided on the inner wall of the positioning groove; when the airflow outlet of the fan assembly outputs airflow through the air outlet, the second protrusion at the corresponding position presses against the positioning post; or when the fan assembly is rotated so that the airflow outlet of the fan assembly is rotated to a position that blows air onto the face, the second protrusion at the corresponding position presses against the positioning post.

[0011] As a preferred embodiment, the locking mechanism includes several grooves on the side of the fan assembly, a top rod slidably mounted on the neckband body with a spherical front end, and an elastic element for pressing the front end of the top rod against the grooves; when the airflow outlet of the fan assembly is rotated to a position for blowing air onto the face, the front end of the top rod is pressed into the corresponding groove, and the depth of the spherical surface extending into the groove is less than the radius of the spherical surface.

[0012] As a preferred embodiment, the locking mechanism includes a positioning groove on the neckband body, a positioning post on the side of the fan assembly, several grooves on the side of the fan assembly, a push rod slidably mounted on the neckband body with a spherical front end, and an elastic element for pressing the front end of the push rod against the groove; the positioning post is slidably and rotatably sleeved in the positioning groove; when the airflow outlet of the fan assembly outputs airflow through the air outlet, the front end of the push rod is pressed into the corresponding groove;

[0013] When the airflow outlet of the fan assembly is rotated to the position where it blows air onto the face, the positioning post is rotated to the corresponding position in the positioning groove, and the front end of the push rod is pressed into the corresponding groove, the depth of the spherical surface extending into the groove being less than the radius of the spherical surface.

[0014] As a preferred embodiment, the positioning groove includes a straight segment and an arc segment. When the end of the fan assembly away from the neckband body is slid to its limit position, the positioning post slides from the front end of the straight segment to the front end of the arc segment.

[0015] As a preferred embodiment, the positioning groove includes a straight section and an arc section, both of which are provided with the second protrusion; the second protrusion includes a front protrusion located within the straight section and used to press the positioning post against the front end of the straight section, and a rear protrusion located within the arc section and used to press the positioning post against the arc section.

[0016] As a preferred embodiment, the air outlet is an open air outlet slot or an air outlet hole.

[0017] As a preferred embodiment, the inner wall of the open air outlet slot is provided with a guide plate that guides the airflow output from the airflow outlet of the fan assembly to the open air outlet slot; one end of the guide plate is close to the airflow outlet of the fan assembly, and the other end of the guide plate is close to the upper surface of the open air outlet slot.

[0018] As a preferred embodiment, the guide plates are provided in at least two form and are evenly arranged along the height direction of the open air outlet slot to form a multi-layer guide structure.

[0019] As a preferred embodiment, the two sides of the guide plate are respectively sealed to the inner wall of the open air outlet slot, and the length of the guide plate gradually increases from the upper layer to the lower layer, forming a far- and near-field air supply structure.

[0020] As a preferred embodiment, the fan assembly includes a housing, a motor fixedly mounted inside the housing, and fan blades mounted on the motor shaft.

[0021] As a preferred embodiment, the fan blade is a bladed fan blade or a turbine fan blade.

[0022] As a preferred embodiment, the fan assembly is provided with an air inlet, and the neckband body is provided with a battery and a circuit board, wherein the battery powers the circuit board and the motor.

[0023] Implementing this invention has the following beneficial effects:

[0024] 1. When using, hang the neckband around your neck. Users can select the desired airflow mode. This structure offers two airflow modes: 1. Connect the airflow outlet of the fan assembly to the air outlet on the neckband, allowing the airflow generated by the fan assembly to be blown out through the outlet. In this mode, the outlet is used to cool the neck or the area above the neck. 2. Rotate the fan assembly so that the airflow outlet rotates upwards and gradually shifts away from the neckband until it is aligned with the face. In this mode, the airflow generated by the fan assembly blows directly onto the face, providing separate cooling for the face. When using the first airflow mode to cool the neck or above, users can easily switch to the second airflow mode by rotating the fan assembly, solving the problem of existing neckband fans where the outlet position cannot be adjusted, preventing users from selecting the appropriate airflow for their face.

[0025] 2. In the second blowing mode, the airflow from the fan assembly's air outlet is more concentrated and blown directly onto the face. Furthermore, it doesn't need to pass through the air ducts inside the neckband, reducing airflow obstruction and increasing the force of the airflow to the face, thus improving heat dissipation. Regardless of whether the user uses the first or second blowing mode, there's no need to hold the neckband fan directly to the face. Simply keeping the neckband hanging around the neck allows for easy operation of the fan assembly, switching between the two blowing modes and allowing for precise airflow direction adjustment. This offers advantages such as switchable airflow, flexibility, and convenience.

[0026] 3. In the first blowing mode, the pin is clamped in the first clamping cavity, and the protrusion prevents the pin from easily sliding in the guide groove. Therefore, the pin is not easily rotated under the clamping action of the clamping cavity, and it is also not easily slipped under the limiting action of the protrusion. When the pin needs to slide into the second clamping cavity, by applying a pulling force towards the second clamping cavity to the fan assembly, the guide groove will undergo elastic deformation, thereby allowing the pin to overcome the force of the guide groove and the protrusion and enter the second clamping cavity, thus clamping the pin in the second clamping cavity.

[0027] 4. In the first blowing mode, the pin slides to the front end of the guide groove. At this time, the positioning post slides to the front end of the straight section, and the positioning post is pressed against the protrusion located near the front end of the straight section, making it difficult for the positioning post to slide, thus ensuring that the fan assembly can be stably positioned in the first blowing mode. During the process of switching from the first blowing mode to the second blowing mode, the pin slides to the rear end of the guide groove. At the same time, the positioning post pushes open the protrusion and slides along the rear end of the straight section and enters the arc section. Then, the fan assembly is rotated, causing the positioning post to rotate within the arc section until the positioning post is pressed against the protrusion within the arc section, thus ensuring that the fan assembly can be stably positioned in the second blowing mode. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a structural schematic diagram of the neck fan with switchable airflow direction with split fan assembly of the present invention in the first blowing mode.

[0030] Figure 2 shows the structure of one of the fan components in Figure 1 separated from the end of the neckband body.

[0031] Figure 3 is a structural schematic diagram of the neck fan with a split fan assembly of the present invention in the second blowing mode.

[0032] Figure 4 is a side view of Figure 1.

[0033] Figure 5 is a schematic diagram of the structure after the cover of Figure 1 has been removed.

[0034] Figure 6 is a cross-sectional view of Figure 4 along the AA direction.

[0035] Figure 7 is a schematic diagram of the structure after the lower cover of Figure 2 has been removed.

[0036] Figure 8 is a structural diagram of Figure 3 after the cover has been removed.

[0037] Figure 9 is an exploded view of the fan assembly and the neck hanger body of the neck hanger fan with a split fan assembly of the present invention.

[0038] Figure 10 is a magnified view of part A in Figure 5.

[0039] Figure 11 is a schematic diagram of the airflow guide plate of the neck fan with switchable airflow direction with split fan assembly according to the present invention.

[0040] Figure 12 is a cross-sectional view of Figure 11 along the BB direction.

[0041] Figure 13 is a structural schematic diagram of embodiment 4 of the neck fan with switchable airflow direction with split fan assembly of the present invention.

[0042] Figure 14 is an enlarged view of part B in Figure 13.

[0043] Figure 15 is a structural schematic diagram of embodiment 5 of the neck fan with switchable airflow direction of the present invention with a split fan assembly.

[0044] Figure 16 is an enlarged view of part C in Figure 15.

[0045] Figure 17 is a schematic diagram of the top rod structure of Embodiments 4 and 5. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1

[0048] Referring to Figures 1 to 8, this embodiment relates to a neck fan with a switchable airflow direction and a split-type fan assembly, including a neck body 1, a fan assembly 2, and a locking mechanism 3 for locking the position of the fan assembly 2; the fan assembly 2 is hinged to both ends of the neck body 1, and the neck body 1 has an air outlet 11; the fan assembly 2 is provided with an air inlet 21, and the airflow outlet 22 of the fan assembly 2 outputs airflow through the air outlet 11, or by rotating the fan assembly 2, the airflow outlet 22 of the fan assembly 2 is rotated to a position to blow air onto the face.

[0049] When in use, the neckband 1 is hung around the neck. Users can select the blowing mode according to their needs. This structure has two blowing modes: 1. Connect the airflow outlet 22 of the fan assembly 2 to the air outlet 11 on the neckband 1, allowing the airflow generated by the fan assembly 2 to be blown out through the air outlet 11; in this mode, the air outlet 11 is used to blow air onto the neck or the head above the neck, achieving heat dissipation for this area; 2. Rotate the fan assembly 2, causing the airflow outlet 22 of the fan assembly 2 to rotate upwards and gradually offset from the neckband 1, until the airflow outlet 22 is rotated to a position corresponding to the face. At this time, the airflow generated by the fan assembly 2 blows directly onto the face through the airflow outlet 22, achieving the function and purpose of separate heat dissipation for the face. When using the first blowing mode to blow air onto the neck or above the neck, the user can switch to the second blowing mode at any time by rotating the fan assembly 2, solving the problem that the position of the air outlet 11 of existing neckband fans cannot be adjusted, preventing users from selecting the blowing mode for their face.

[0050] In the second blowing mode, the airflow output from the airflow outlet 22 of the fan assembly 2 blows directly onto the face without passing through the air duct inside the neckband body 1. This reduces the obstruction of the airflow and increases the airflow force to the face, thereby improving the heat dissipation effect. This solves the problem that in the existing system, the airflow has to flow through the air duct of the neckband body 1 before being output from the air outlet 11, so the airflow is subject to resistance when flowing inside the neckband body 1, resulting in a significant reduction in airflow force.

[0051] Furthermore, compared to the first blowing mode where the airflow from the air outlet 22 of the fan assembly 2 is dispersed by multiple air outlets 11, in the second blowing mode, the airflow from the air outlet 22 of the fan assembly 2 can be more concentrated and blown onto the face, increasing the airflow force on the face and thus improving the heat dissipation effect. It should be further noted that regardless of whether the user uses the first or second blowing mode, there is no need for the user to hold the neck hanger fan. The user only needs to hang the neck hanger 1 around their neck to operate the fan assembly 2 and switch between the two blowing modes, realizing the direct adjustment of the airflow direction. It has the advantages of switchable airflow direction, flexible use, and convenience. It solves the problem that when the user holds the neck hanger 1 and blows the airflow from the air outlet 11 onto the face, the airflow force is too weak and the heat dissipation effect on the face is poor. Moreover, it requires holding it for a long time, which is extremely inconvenient and far from meeting the user's heat dissipation needs.

[0052] When the fan assembly 2 is rotated to a position where its airflow outlet 22 blows air onto the face (second blowing mode), the locking mechanism 3 locks the fan assembly 2 in this position to maintain a stable position during operation and prevent it from spinning. When the fan assembly 2 is rotated to a position where its airflow outlet 22 outputs airflow through the air outlet 11 (first blowing mode), the locking mechanism 3 locks the fan assembly 2 in this position to maintain a stable position during operation and prevent it from spinning, and to maintain a good seal between the airflow outlet 22 of the fan assembly 2 and the end of the neckband body 1.

[0053] The fan assembly 2 is slidably mounted on the end of the neckband body 1. After sliding the fan assembly 2 away from the end of the neckband body 1, rotating the fan assembly 2 rotates its airflow outlet 22 to a position for blowing air onto the face. In this structure, the fan assembly 2 can slide relative to the end of the neckband body 1, allowing its airflow outlet 22 to move away from or near the end of the neckband body 1. When switching from the first blowing mode to the second blowing mode, the fan assembly 2 is first slid away from the end of the neckband body 1, moving its airflow outlet 22 away from the end of the neckband body 1. This prevents the fan assembly 2 from colliding with the end of the neckband body 1 during rotation, ensuring that the fan assembly 2 can smoothly rotate to a position for blowing air onto the face. Similarly, when switching from the second blowing mode to the first blowing mode, first rotate the fan assembly 2 until the airflow outlet 22 is aligned with the end of the neckband body 1. This ensures that the fan assembly 2 will not collide with the end of the neckband body 1 during rotation, guaranteeing that the fan assembly 2 can rotate smoothly to this position. Then, slide the fan assembly 2 close to the end of the neckband body 1 until the airflow outlet 22 of the fan assembly 2 is in contact with the end of the neckband body 1.

[0054] The fan assembly 2 is hinged to the neckband body 1 via a pin 230, which is perpendicular to the side of the end of the neckband body 1. The pin 230 is located at the center of both sides of the fan assembly 2 and is movably connected to the end of the neckband body 1. This structure, by positioning the pin 230 perpendicular to the side of the end of the neckband body 1, allows the airflow outlet 22 of the fan assembly 2 to rotate only up and down, thus enabling the switching between two blowing modes. It is evident that the rotation of the fan assembly 2 in this structure only allows for switching the airflow direction and does not enable folding or storage of the fan assembly 2.

[0055] The neck hanger body 1 has a guide groove 12, and the pin 230 is slidably and rotatably fitted within the guide groove 12. The neck hanger body 1 of this structure is made of plastic. This plastic material has a certain degree of elasticity, and the pin 230 and the guide groove 12 can be connected by an interference fit, meaning the guide groove 12 has a certain clamping force on the pin 230. With this connection structure, the pin 230 can also slide and rotate within the guide groove 12 when pushed by an external force. Of course, the pin 230 and the guide groove 12 can also be connected by an over-fit or clearance fit.

[0056] As shown in Figures 5 and 10, the locking mechanism 3 includes a first protrusion 31 on the inner wall of the guide groove 12. The first protrusion 31 divides the guide groove 12 into at least two clamping cavities 121, and the pin 230 is clamped in the clamping cavity 121. In the first blowing mode, the pin 230 is clamped in the first clamping cavity 121, and the first protrusion 31 prevents the pin 230 from easily sliding within the guide groove 12. Therefore, the pin 230 is less likely to rotate under the clamping action of the clamping cavity 121, and it is also less likely to slide under the limiting action of the first protrusion 31. When the pin 230 needs to slide into the second clamping cavity, by applying a pulling force to the fan assembly 2 in the direction of the second clamping cavity 121, the guide groove 12 can be elastically deformed, thereby allowing the pin 230 to overcome the force of the guide groove 12 and the first protrusion 31 and enter the second clamping cavity. In this embodiment, as shown in Figures 5 to 7, there are two first protrusions 31, which divide the guide groove 12 into three clamping cavities 121. The clamping cavities 121 on both sides of the guide groove 12 are equivalent to the first clamping cavity 121 and the second clamping cavity 121 mentioned above, while the clamping cavity 121 in the middle of the guide groove 12 is a transition cavity, which serves to adjust the distance between the airflow outlet 22 of the fan assembly 2 and the end of the neck hanger body 1.

[0057] The fan assembly 2 includes a housing 23, a motor 24 fixedly installed inside the housing 23, and fan blades 25 mounted on the shaft of the motor 24. The air inlet is located at the front end of the housing 23, and the air outlet 22 of the fan assembly 2 is located at the rear end of the housing 23. One end of the housing 23 opposite to the end of the neckband body 1 is spherical, and correspondingly, the edge of the end of the neckband body 1 corresponding to the spherical surface is an arc-shaped surface connected to the air outlet. In the first blowing mode, the spherical surface and the arc-shaped surface are in contact. More preferably, a sealing ring is provided on the arc-shaped surface. Under the sealing effect of the sealing ring, the airflow output from the air outlet 22 of the fan assembly 2 can be prevented from leaking out between the spherical surface and the arc-shaped surface.

[0058] The fan blade 25 can be a bladed fan blade or a turbine fan blade. When the fan blade 25 is a bladed fan blade, the shaft of the motor 24 is parallel to the direction of the airflow. When the fan blade 25 is a turbine fan blade, the shaft of the motor 24 is perpendicular to the direction of the airflow. In this embodiment, as shown in Figure 6, the fan blade 25 is a bladed fan blade. Bladed fan blades have a larger airflow output and can better improve the effect of airflow and heat dissipation.

[0059] The air outlet 11 is an open air outlet slot or air outlet hole. As shown in Figures 1 to 11, the air outlet 11 in this embodiment adopts an open air outlet slot. The shape of the open air outlet slot is the same as the shape of the neck hanger body 1, both of which are inverted "U" shaped.

[0060] As shown in Figures 11 and 12, the inner wall of the open air outlet slot is provided with a guide plate 5 to guide the airflow output from the airflow outlet 22 of the fan assembly 2 into the open air outlet slot. One end of the guide plate 5 is close to the airflow outlet 22 of the fan assembly 2, and the other end of the guide plate 5 is close to the upper surface of the open air outlet slot. The guide plate 5 directly guides the airflow output from the airflow outlet 22 of the fan assembly 2 into the open air outlet slot, thereby controlling the direction of the airflow blown out from the open air outlet slot. Furthermore, by controlling the position of one end of the guide plate 5 near the upper surface of the open air outlet slot, the airflow can be directed to a corresponding position on the human body. Therefore, the guide plate 5 has the function of adjusting and controlling the position and direction of the airflow.

[0061] At least two guide plates 5 are provided and evenly arranged along the height direction of the open air outlet slot, forming a multi-layered airflow guiding structure. The multi-layered guide plates 5 guide the airflow output from the air outlet 22 of the fan assembly 2 in layers, thereby dividing the airflow output from the air outlet 22 of the fan assembly 2 into the required number of portions for delivery, thus controlling the magnitude of the airflow force output from each portion of the open air outlet slot. Specifically, as the number of guide plates 5 increases, the airflow force guided and output from the open air outlet slot by each guide plate 5 gradually decreases; conversely, the airflow force guided and output from the open air outlet slot by each guide plate 5 gradually increases.

[0062] Furthermore, the two sides of the guide plate 5 are respectively sealed to the inner wall of the open air outlet slot, and the length of the guide plate 5 gradually increases from the upper layer to the lower layer, forming a near-far air supply structure; the guide plate 5 is arc-shaped. This structure uses guide plates 5 of different lengths to guide the airflow output from the air outlet 22 of the fan assembly 2 to different positions of the open air outlet slot, thereby forming a structure that supplies air to the open air outlet slot from near to far; and under the guiding effect of the arc-shaped guide plate 5, the difference in air force between the near-end air supply and the far-end air supply is small, improving the uniformity of air supply and thus improving the heat dissipation effect.

[0063] The neckband body 1 houses a battery 4 and a circuit board, with the battery 4 supplying power to the circuit board and the motor 24. Additionally, the neckband body 1 has several control buttons. These buttons allow control of the operating status of the motor 24. Covers 10 are located on both sides of the ends of the neckband body 1.

[0064] Example 2

[0065] This embodiment is an improvement on the locking mechanism 3 based on embodiment 1. As shown in Figure 9, the locking mechanism 3 includes a positioning groove 32 on the neckband body 1, a positioning post 33 on the side of the fan assembly 2, and a second protrusion 310 for locking the positioning post 33. The positioning post 33 is slidably and rotatably fitted into the positioning groove 32. At least two second protrusions 310 are provided on the inner wall of the positioning groove 32. When the airflow outlet 22 of the fan assembly 2 outputs airflow through the air outlet 11, the second protrusion 310 at the corresponding position presses against the positioning post 33; or when the airflow outlet 22 of the fan assembly 2 is rotated to a position that blows air onto the face, the second protrusion 310 at the corresponding position presses against the positioning post 33. In this structure, since only the guide groove 12 needs to play the role of sliding guidance and displacement limitation of the pin 230, it is better to use a clearance fit between the pin 230 and the guide groove 12, while the second protrusion 310 plays the role of limiting sliding and rotation. In the first blowing mode, the pin 230 slides to the front end of the guide groove 12. At this time, the positioning post 33 slides to the front end of the positioning groove 32, and the positioning post 33 is pressed against the second protrusion 310, thereby ensuring that the fan assembly 2 can be stably positioned in the first blowing mode. During the process of switching from the first blowing mode to the second blowing mode, the pin 230 slides to the rear end of the guide groove 12, and then the fan assembly 2 is rotated, causing the positioning post 33 to rotate within the positioning groove 32 until the positioning post 33 is pressed against the second protrusion 310, thereby ensuring that the fan assembly 2 can be stably positioned in the second blowing mode.

[0066] The positioning groove 32 includes a straight segment 321 and an arc segment 322. Both the straight segment 321 and the arc segment 322 are provided with a second protrusion 310. The second protrusion 310 includes a front protrusion located in the straight segment 321 and a rear protrusion located in the arc segment 322. The front protrusion is used to press the positioning post 33 against the front end of the straight segment 321. The rear protrusion is used to press the positioning post 33 against the rear end of the arc segment 322.

[0067] In the first blowing mode, the pin 230 slides to the front end of the guide groove 12. At this time, the positioning post 33 slides to the front end of the straight section 321, and the positioning post 33 is pressed against the first protrusion located near the front end of the straight section 321, making it difficult for the positioning post 33 to slide, thus ensuring that the fan assembly 2 can be stably positioned in the first blowing mode. During the process of switching from the first blowing mode to the second blowing mode, the pin 230 slides to the rear end of the guide groove 12. At the same time, the positioning post 33 pushes open the front protrusion and slides along the rear end of the straight section 321 and enters the arc section 322. Then, the fan assembly 2 is rotated, causing the positioning post 33 to rotate within the arc section 322 until the positioning post 33 is pressed against the rear protrusion within the arc section 322, thus ensuring that the fan assembly 2 can be stably positioned in the second blowing mode.

[0068] Example 3

[0069] This embodiment is an improvement on the locking mechanism based on Embodiments 1 and 2. As shown in Figures 8 and 9, the locking mechanism 3 includes a first protrusion 31 on the inner wall of the guide groove 12, a positioning groove 32 on the neckband body 1, a positioning post 33 on the side of the fan assembly 2, and a second protrusion 310 for locking the positioning post 33. The first protrusion 31 divides the guide groove 12 into at least two clamping cavities 121, and the pin 230 is clamped in the clamping cavity 121. The positioning post 33 is slidably and rotatably sleeved in the positioning groove 32. At least two second protrusions 310 are provided on the inner wall of the positioning groove 32. When the airflow outlet 22 of the fan assembly 2 outputs airflow through the air outlet 11, the second protrusion 310 at the corresponding position presses against the positioning post 33; or when the airflow outlet 22 of the fan assembly 2 is rotated to a position that blows air onto the face by rotating the fan assembly 2, the second protrusion 310 at the corresponding position presses against the positioning post 33. In this structure, a first protrusion 31 is provided in the guide groove 12, and a second protrusion 310 is also provided in the positioning groove 32. In the first blowing mode, the pin 230 slides to the front end of the guide groove 12 and is held by the first protrusion 31. At this time, the positioning post 33 slides to the front end of the positioning groove 32 and is pressed by the second protrusion 310, thereby ensuring that the fan assembly 2 can be stably positioned in the first blowing mode. During the process of switching from the first blowing mode to the second blowing mode, the pin 230 slides to the rear end of the guide groove 12 and is held by the first protrusion 31. Then, the fan assembly 2 is rotated, causing the positioning post 33 to rotate in the positioning groove 32 until the positioning post 33 is pressed by the second protrusion 310, thereby ensuring that the fan assembly 2 can be stably positioned in the second blowing mode.

[0070] Example 4

[0071] This embodiment is based on Example 1, and as an improvement on the locking mechanism, as shown in Figures 13, 14, and 17, the locking mechanism 3 includes several grooves 30 provided on the side of the fan assembly, a push rod 5 slidably mounted on the neckband body 1 with a spherical front end 51, and an elastic member 6 for pressing the front end of the push rod 5 against the grooves 30; when the airflow outlet 22 of the fan assembly 2 is rotated to a position for blowing air onto the face, the front end of the push rod 5 is pressed into the corresponding groove 30, and the depth of the spherical surface 51 extending into the groove 30 is less than the radius of the sphere. The elastic member 6 is a spring.

[0072] In the first blowing mode, the pin 230 is clamped in the first clamping cavity 121, and the first protrusion 31 prevents the pin 230 from easily sliding in the guide groove 12. At this time, the front end of the push rod 5 is not pressed into the groove 30. When the pin 230 needs to slide into the second clamping cavity, by applying a pulling force to the fan assembly 2 in the direction of the second clamping cavity 121, the guide groove 12 can be elastically deformed, thereby allowing the pin 230 to overcome the force of the guide groove 12 and the first protrusion 31 and enter the second clamping cavity. At this time, the front end of the push rod 5 is pressed into the corresponding groove 30 under the elastic force of the elastic member 6. In this embodiment, as shown in Figures 5 to 7, two first protrusions 31 are used to divide the guide groove 12 into three clamping cavities 121. The clamping cavities 121 on both sides of the guide groove 12 are equivalent to the first and second clamping cavities 121 mentioned above, while the clamping cavity 121 in the middle of the guide groove 12 is a transition cavity, which serves to adjust the distance between the airflow outlet 22 of the fan assembly 2 and the end of the neck hanger body 1. In this embodiment, multiple grooves 30 are provided; when the fan assembly 2 is rotated so that the airflow outlet 22 of the fan assembly 2 is rotated to the position for blowing on the face, the front end of the push rod 5 can be pressed into the corresponding groove 30 as the fan assembly 2 rotates, so that the fan assembly 2 can be locked at multiple rotation angle positions and is not easy to rotate, forming a multi-angle adjustable locking structure. That is, the user can adjust the rotation angle of the fan assembly according to his / her needs to blow on the desired face position, which has the advantages of flexible adjustment and more convenient use.

[0073] Example 5

[0074] This embodiment is an improvement on the locking mechanism based on embodiment 1. As shown in Figures 15 to 17, the locking mechanism 3 includes a positioning groove 32 on the neck hanger body, a positioning post 33 on the side of the fan assembly 2, several grooves 30 on the side of the fan assembly 2, a top rod 5 slidably mounted on the neck hanger body with a spherical front end 51, and an elastic member 6 for pressing the front end of the top rod 5 against the groove 30. The positioning post 33 is slidably and rotatably sleeved in the positioning groove 32. When the airflow outlet 22 of the fan assembly 2 outputs airflow through the air outlet, the front end of the top rod 5 is pressed into the corresponding groove 30.

[0075] When the airflow outlet 22 of the fan assembly 2 is rotated to the position of blowing on the face, the positioning post 33 is rotated to the corresponding position in the positioning groove 32, and the spherical surface 51 at the front end of the push rod 5 is pressed into the corresponding groove 30, wherein the depth of the spherical surface 51 extending into the groove 30 is less than the radius of the spherical surface 51.

[0076] The guide groove 12 of this structure serves as a sliding guide for the pin 230, while the positioning groove 32 guides the sliding and rotation of the positioning post 33. In the first blowing mode, the front end of the push rod 5 is pressed into the groove 30 at the corresponding position on the side of the corresponding fan assembly 2. During the switching from the first blowing mode to the second blowing mode, the pin 230 slides in the guide groove 12, while the positioning post 33 slides in the positioning groove 32. When the pin 230 slides to the limit position away from the end of the neck-hanging body 1, the fan assembly 2 is rotated. During the rotation of the fan assembly 2, the positioning post 33 can only rotate along the positioning groove 32, while the pin 230 can only rotate within the guide groove 12 and cannot slide. At the same time, the push rod 5 continuously reciprocates, pushing the front end of the push rod 5 into or out of the groove 30 at the corresponding position, thereby achieving the function and purpose of locking the fan assembly 2.

[0077] The positioning groove 32 includes a straight section 321 and an arc-shaped section 322. When the end of the fan assembly 2 away from the neckband body 1 is slid to its limit position, the positioning post 33 slides from the front end of the straight section 321 to the front end of the arc-shaped section 322. In the first blowing mode, the pin 230 slides to the front end of the guide groove 12. At this time, the positioning post 33 slides to the front end of the straight section 321, and the front end of the push rod 5 presses into the groove 30 at the corresponding position on the side of the fan assembly 2, making it difficult for the fan assembly to slide, thereby ensuring that the fan assembly 2 can be stably positioned in the first blowing mode. During the process of switching from the first blowing mode to the second blowing mode, the pin 230 slides to the rear end of the guide groove 12, while the positioning pin 33 slides along the rear end of the straight section 321 and enters the arc section 322. Then, the fan assembly 2 is rotated, causing the positioning pin 33 to rotate within the arc section 322. At the same time, the push rod 5 reciprocates continuously, pushing the front end of the push rod 5 into or out of the corresponding groove 30, thereby achieving the function of locking the fan assembly 2 and stably maintaining the fan assembly 2 at the corresponding rotation angle position of the second blowing mode.

[0078] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A neck fan with a switchable airflow direction and a split-type fan assembly, characterized in that: The device includes a neck hanger body for hanging around the neck; a fan assembly hinged to both ends of the neck hanger body; and a locking mechanism for locking the position of the fan assembly. The neck hanger body has an air outlet. The fan assembly's airflow outlet outputs airflow through the air outlet, or the airflow outlet can be rotated to a position where it blows air onto the face. The fan assembly is hinged to the neck hanger body via a pin, the pin being perpendicular to the side of the neck hanger body's end. The neck hanger body has a guide groove, and the pin is slidably and rotatably fitted within the guide groove. The locking mechanism includes a positioning groove on the neck hanger body, a positioning post on the side of the fan assembly, and a second protrusion for locking the positioning post. The positioning post is slidably and rotatably fitted within the positioning groove. At least two second protrusions are provided on the inner wall of the positioning groove. When the fan assembly's airflow outlet outputs airflow through the air outlet, the second protrusion at the corresponding position presses against the positioning post; or when the fan assembly is rotated to a position where it blows air onto the face. When rotated to a position for blowing air onto the face, the second protrusion at the corresponding position presses against the positioning post; or the locking mechanism includes a positioning groove on the neckband body, a positioning post on the side of the fan assembly, several grooves on the side of the fan assembly, a top rod slidably mounted on the neckband body with a spherical front end, and an elastic element for pressing the front end of the top rod against the groove; the positioning post is slidably and rotatably fitted into the positioning groove; when the airflow outlet of the fan assembly outputs airflow through the air outlet, the front end of the top rod is pressed into the corresponding groove; when the airflow outlet of the fan assembly is rotated to a position for blowing air onto the face, the positioning post is rotated to the corresponding position in the positioning groove, and the front end of the top rod is pressed into the corresponding groove, the depth of the spherical surface extending into the groove is less than the radius of the sphere; the fan assembly is slidably mounted on the end of the neckband body, and after the fan assembly is slidably moved away from the end of the neckband body, the airflow outlet of the fan assembly is rotated to a position for blowing air onto the face by rotating the fan assembly.

2. A neck fan with a switchable airflow direction and a split-type fan assembly as described in claim 1, characterized in that, The positioning groove includes a straight section and an arc section. When the end of the fan assembly away from the neckband body is slid to the limit position, the positioning post slides from the front end of the straight section to the front end of the arc section.

3. A neck fan with a switchable airflow direction and a split-type fan assembly as described in claim 1, characterized in that, The positioning groove includes a straight section and an arc section, and both the straight section and the arc section are provided with the second protrusion; the second protrusion includes a front protrusion located in the straight section and used to press the positioning post against the front end of the straight section, and a rear protrusion located in the arc section and used to press the positioning post against the arc section.

4. A neck fan with a switchable airflow direction and a split-type fan assembly as described in claim 1, characterized in that, The air outlet is an open air outlet slot or an air outlet hole.

5. A neck fan with a switchable airflow direction and a split-type fan assembly according to claim 4, characterized in that, A guide plate is provided on the inner wall of the open air outlet slot; one end of the guide plate is close to the airflow outlet of the fan assembly, and the other end of the guide plate is close to the upper surface of the open air outlet slot.

6. A neck fan with a switchable airflow direction and a split-type fan assembly according to claim 5, characterized in that, The guide plates are provided in at least two and are evenly arranged along the height direction of the open air outlet slot to form a multi-layer guide structure.

7. A neck fan with a switchable airflow direction and a split-type fan assembly as described in claim 5 or 6, characterized in that, The two sides of the guide plate are respectively sealed to the inner wall of the open air outlet slot, and the length of the guide plate gradually increases from the upper layer to the lower layer, forming a far- and near-field air supply structure.

8. A neck fan with a switchable airflow direction and a split-type fan assembly according to claim 1, characterized in that, The fan assembly includes a housing, a motor fixedly installed inside the housing, and fan blades mounted on the motor shaft.

9. A neck fan with a switchable airflow direction and a split-type fan assembly according to claim 8, characterized in that, The fan blades are bladed fan blades or turbine fan blades.

10. A neck fan with a switchable airflow direction and a split-type fan assembly according to claim 1, characterized in that, The fan assembly has an air inlet, and the neckband body contains a battery and a circuit board, with the battery supplying power to the circuit board and the motor.

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