A headrest fan for a vehicle

Abstract

The utility model provides a kind of headrest fan for vehicle, including shell, centrifugal fan and baffle assembly, shell inside forms the air supply cavity and air outlet cavity that are interconnected, air outlet cavity is equipped with at least first air outlet and second air outlet, first air outlet is suitable for directing airflow to first direction, second air outlet is suitable for directing airflow to second direction different from first direction;Centrifugal fan is arranged in air supply cavity, airflow generating device is the centrifugal fan of axial air intake, radial air outlet;Baffle assembly includes pivot and plate body, plate body is suitable for being rotatably arranged in air outlet cavity around pivot, plate body at least has first position and second position, wherein: in first position, plate body is suitable for guiding airflow to flow out only from first air outlet;In second position, plate body is suitable for guiding airflow to flow out only from second air outlet.The utility model changes the relative position of plate body and first, second air outlet by rotatably setting plate body in air outlet cavity, the switching of single air outlet air outlet is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive interior accessories, and in particular relates to a car headrest fan. Background Technology

[0002] Car headrest fans, as devices to enhance driving and riding comfort, are already known to the public. For example, Chinese utility model patent application number CN202421064250.7 discloses a car headrest fan, which includes a housing, a fan assembly, and a fixing part. It is installed between the headrest and backrest of a vehicle seat using the fixing part (such as a flexible strap or a C-shaped buckle). The fan assembly (including a centrifugal fan) operates, causing airflow to flow in from the air inlet of the housing and out from the air outlet, providing ventilation for the occupants. This prior art also discloses setting a height-limiting block or a limiting baffle at the air inlet to prevent foreign objects from entering, and power supply control via a power module and a control module, with movable blades at the air outlet to initially guide the airflow direction. However, this prior art and similar products on the market have overly limited functionality, typically only achieving single-direction airflow or limited angle adjustment via movable blades. They cannot achieve thorough and stable switching between different airflow modes (such as a dedicated face blowing mode or a dedicated body blowing mode), failing to meet the differentiated airflow needs of users for different parts of the body. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a car headrest fan to meet the needs of users.

[0004] To achieve the above objectives, this utility model provides a car headrest fan, including...

[0005] The housing has an internally connected air supply cavity and an air outlet cavity. The air outlet cavity is provided with at least a first air outlet and a second air outlet. The first air outlet is adapted to guide the airflow in a first direction, and the second air outlet is adapted to guide the airflow in a second direction different from the first direction.

[0006] An airflow generating device is disposed within the air supply cavity. The airflow generating device is a centrifugal fan with axial air intake and radial air outlet. It is suitable for converting the air drawn in from the upper and lower sides of the housing into radially flowing airflow and directionally delivering it to the air outlet cavity. The automotive headrest fan is installed between the headrest of the vehicle seat and the back of the vehicle seat. This design can adapt to installation environments with "compact vertical space and ample front and rear space" without occupying excessive vertical dimensions.

[0007] A baffle assembly includes a pivot and a plate, the plate being rotatably disposed on the air outlet cavity about the pivot, the plate having at least a first position and a second position, wherein: in the first position, the plate is adapted to guide airflow out only from the first air outlet; and in the second position, the plate is adapted to guide airflow out only from the second air outlet.

[0008] Preferably, the first direction is configured towards the neck region of the vehicle occupant, and the second direction is configured towards the torso region of the vehicle occupant; and / or, the first air outlet is located on the front side of the housing, and the second air outlet is located on the lower side of the housing. This design aims to precisely align the airflow direction with the core cooling needs of the human body during driving, namely the neck and back, and ensure that the structural design and functional requirements are consistent by limiting the specific location of the air outlets on the housing.

[0009] Preferably, the plate also has at least one third position; in the third position, the plate is adapted to allow airflow to simultaneously exit from the first air outlet and the second air outlet. This design expands the product's functionality, providing a mixed airflow mode in addition to single airflow, which can simultaneously provide mild cooling for the face and torso without frequently switching between single airflow modes, thus improving ease of use.

[0010] Preferably, the plate has several third positions at different angles, thereby enabling the distribution of the airflow ratio to the first air outlet and the second air outlet through the angle change of the plate.

[0011] Preferably, at least a portion of the air outlet cavity has a cross-section that is shaped like the rotation path of the outer edge of the plate, or the plate is designed to fit snugly against the inner wall of the air outlet cavity to ensure that there is no leakage of airflow when the plate is blocked, and to guide the airflow directionally from the target air outlet.

[0012] Preferably, the automotive headrest fan further includes a positioning mechanism adapted to provide a locking force so that the plate is held in a first position or a second position; the positioning mechanism includes a first mating part, a second mating part, and an elastic element, one of the first mating part and the second mating part is disposed on the baffle assembly, and the other of the first mating part and the second mating part is disposed on the housing, the first mating part or the second mating part is connected to the elastic element, and the first mating part and the second mating part cooperate to generate the locking force.

[0013] When the plate is rotated, the first mating part and the second mating part interfere with each other, forcing the elastic element to deform to generate peak resistance; after passing the peak resistance point, the deformation of the elastic element is released, and the plate can switch between the first position and the second position.

[0014] Preferably, the baffle assembly further includes an end cap disposed at the end of the rotating shaft, with the second mating part disposed at the end cap and thus integrated onto the rotating shaft, resulting in a compact structure and high torque transmission efficiency.

[0015] A stop post is provided inside the housing. The side of the stop post is adapted to form the first mating part. The outer peripheral surface of the end head has a first sectional surface and a second sectional surface adapted to form the second mating part. The elastic element is the elasticity of the material of the stop post and / or the end head itself. When the plate is in the first position or the second position, the side of the stop post is in contact with the first sectional surface or the second sectional surface. Surface contact can provide a frictional force much greater than that of point / line contact, which is the locking force of the locking mechanism. Therefore, it has extremely strong resistance to vibration and movement, and its stability is significantly improved.

[0016] Alternatively, the first mating part is a ball, the elastic element is a spring that abuts against the ball, and the second mating part is a groove formed at the end; when the plate is in the first position or the second position, the ball is engaged in one of the grooves.

[0017] Preferably, the first and second cut surfaces are smoothly connected by a transition arc surface with the axis of the rotating shaft as its central axis. This design allows the stop post to move along a smooth path when switching between the two positions, significantly reducing operating torque, mechanism wear, and noise, while providing clear and gentle tactile feedback.

[0018] Preferably, the automotive headrest fan further includes a stop unit, which includes at least a first limiting surface and a second limiting surface distributed within the air outlet cavity, wherein: when the baffle assembly is rotated to the first position, the stop unit is adapted to abut against the first limiting surface to limit its further rotation; when the baffle assembly is rotated to the second position, the stop unit is adapted to abut against the second limiting surface to limit its further rotation.

[0019] Preferably, the baffle assembly includes an inner plate portion close to the fan and an outer plate portion away from the fan in the first position, with the inner plate portion and the outer plate portion disposed on both sides of the rotating shaft.

[0020] The stop unit includes:

[0021] The first stop portion is provided at the connection between the air supply cavity and the air outlet cavity, and the first stop portion has a horizontally arranged first stop plane.

[0022] The second stop portion is located on the inner side of the top of the air outlet cavity. The second stop portion has an upper stop plane and an upper stop inclined surface.

[0023] The third stop portion is located on the inner side of the bottom of the air outlet cavity, and the third stop portion has a lower stop slope.

[0024] When the baffle assembly is in the first position, the lower surface of the inner plate abuts against the first stop plane, and the upper surface of the outer plate abuts against the upper stop plane. The first stop plane and the upper stop plane are adapted to form the first limiting surface.

[0025] When the baffle assembly is in the second position, the upper surface of the inner plate abuts against the upper stop inclined surface, and the lower surface of the outer plate abuts against the lower stop inclined surface. The upper and lower stop inclined surfaces are adapted to form the second limiting surface. This design forms a "statically indeterminate" constraint through multi-position and multi-directional limitation, resulting in a stable locking effect.

[0026] Preferably, from a top-down projection perspective, the projection of the second air outlet is completely outside the projection of the rotating shaft of the baffle assembly, ensuring that the airflow from the air supply cavity can smoothly enter the flow channel leading to the second air outlet, avoiding obstruction of the airflow by the rotating shaft, thereby reducing wind resistance and noise and improving air outlet efficiency.

[0027] As a preferred option, the shaft and the plate are integrally formed, and the thickness of the plate gradually decreases from the shaft outwards. The bending moment and torque borne by the plate near the shaft are the greatest, and increasing the thickness can enhance the baffle assembly's ability to resist deformation.

[0028] Preferably, the plate is connected to the rotating shaft via four sets of transition surfaces. The second stop portion includes an upper mating arc surface, and the third stop portion includes a lower mating arc surface. When the baffle assembly is in the first position, the lower mating arc surface is adapted to fit one of its transition surfaces; when the baffle assembly is in the second position, the upper mating arc surface is adapted to fit another transition surface.

[0029] Preferably, when the baffle assembly is in the second position, the projection of the first air outlet falls completely within the projection of the baffle assembly's plate body from a top-down projection perspective, ensuring that the plate body can completely cover the airflow channel of the first air outlet in the second position, thus preventing air leakage.

[0030] Preferably, in a front-to-back projection view, the projection of the air supply cavity falls completely within the projection of the air outlet cavity.

[0031] Preferably, at least one vertical rectifier is provided inside the air supply cavity. The vertical rectifier is arranged parallel to the fan shaft of the centrifugal fan. The rotating shaft of the baffle assembly is rotatably supported on the vertical rectifier. Multi-point support can improve the smoothness and stability of the plate during rotation, and at the same time improve the structural strength of the plate when it is impacted by airflow. One edge of the vertical rectifier extends to the first air outlet, and the other edge of the vertical rectifier extends to the second air outlet. The vertical rectifier is adapted to guide the airflow to the first air outlet and the second air outlet respectively and rectify it, divide the radial airflow discharged by the centrifugal fan, avoid the mutual interference of multiple airflows to form vortices, make the airflow flow directionally along the rectifier, and guide the airflow to accurately enter the target air outlet.

[0032] Preferably, the first air outlet is rotatably equipped with a grille, which not only prevents foreign objects from entering but also allows for fine-tuning of the air outlet's angle to accommodate the neck position of occupants of different heights. The grille includes at least one horizontal grille plate, and the plate in the first position is flush with one of the horizontal grille plates. The baffle and the horizontal grille plate form a continuous guiding plane, resulting in smoother airflow and preventing the formation of steps between the plate and the horizontal grille plate, thus reducing wind resistance and noise. And / or, the second air outlet includes a guide slope that expands outward from top to bottom, preventing airflow from directly hitting the seat back while simultaneously expanding the cross-section of the second air outlet from top to bottom, reducing airflow outlet resistance and increasing airflow speed. The plate in the second position at least partially overlaps with the guide slope, ensuring that the plate in the second position guides the airflow completely to the second air outlet.

[0033] Preferably, one end of the baffle assembly is provided with an aromatherapy cage, at least a portion of which extends into the air outlet cavity. When the airflow passes through, it carries the aromatherapy scent and diffuses it to the passenger area. The aromatherapy cage includes an openable and closable cover, which is exposed outside the housing for easy replacement of the aromatherapy carrier.

[0034] The beneficial effects of this utility model are:

[0035] By rotatably setting a plate inside the air outlet cavity, the relative position of the plate with the first and second air outlets can be changed. That is, when the plate is in the first position, the airflow channel of the second air outlet is blocked, and when the plate is in the second position, the airflow channel of the first air outlet is blocked, thereby achieving the switching of airflow from a single air outlet.

[0036] A positioning mechanism provides a stable locking force to the board, preventing unexpected rotation due to vehicle bumps. Simultaneously, the peak resistance generated by the deformation of the elastic element provides clear operational feedback to the user, such as a "click" or a sudden change in resistance, helping the user perceive that they have reached the target position and avoiding blind operation.

[0037] By setting a stop unit to limit the maximum rotation range of the plate, it prevents excessive rotation caused by excessive force or accidental operation, which could lead to the plate colliding with the air outlet wall and damaging the internal structure. At the same time, the stop unit can work in conjunction with the positioning mechanism. Even if the positioning mechanism fails, the limiting surface can still prevent the plate from rotating beyond its range, thus protecting the structural safety. Attached Figure Description

[0038] Figure 1 is a structural schematic diagram of a car headrest fan provided by this utility model.

[0039] Figure 2 is a three-dimensional schematic diagram of a car headrest fan provided by this utility model.

[0040] Figure 3 is an exploded view of a car headrest fan provided by this utility model.

[0041] Figure 4 is a front view of a car headrest fan provided by this utility model.

[0042] Figure 5 is a cross-sectional view (AA) of a car headrest fan provided by this utility model.

[0043] Figure 6 is a BB cross-sectional view of a car headrest fan provided by this utility model.

[0044] Figure 7 is a CC cross-sectional view of a car headrest fan provided by this utility model.

[0045] Figure 8 is an exploded view of the shell provided by this utility model.

[0046] Figure 9 is an exploded view of the baffle assembly provided by this utility model.

[0047] Figure 10 is a rear view of the baffle assembly provided by this utility model.

[0048] 101. First housing; 102. Second housing; 103. Air supply cavity; 104. Air outlet cavity; 105. First mounting base; 106. Second mounting base; 107. First air inlet; 108. Second air inlet; 109. First air outlet; 110. First air inlet hood; 112. Second air inlet hood; 113. Vertical rectifier plate; 114. Grille; 1141. Frame; 1142. Horizontal grille; 1143. Vertical grille; 115. First control circuit board; 116. Second control circuit board; 1161. Power interface; 117. Velcro cable tie; 119. Second air outlet; 1191. Guide slope; 200. Centrifugal fan; 300. Baffle assembly; 301. Plate; 311. Inner plate; 312. Outer plate Part; 313, Transition surface; 302, Rotating shaft; 303, First stop end plate; 304, Second stop end plate; 305, First end; 306, Second end; 307, Aroma cage; 371, Incense inlet section; 372, Incense dispersing section; 373, Aroma carrier; 308, Drive knob; 309, First end cap; 401, Stop post; 402, First cut surface; 403, Second cut surface; 404, Transition arc surface; 411, First mating part; 412, Second mating part; 501, First stop part; 511, First stop plane; 502, Second stop part; 521, Upper stop plane; 522, Upper stop inclined surface; 523, Upper mating surface; 503, Third stop part; 531, Lower stop inclined surface; 532, Lower mating surface. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0051] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] See Figures 1 to 10 The present invention provides a car headrest fan, including a housing, an airflow generating device, namely a centrifugal fan 200, and a baffle assembly 300.

[0053] In this embodiment, the housing includes a first housing 101 and a second housing 102 that fit together. They are pre-connected by a snap-fit ​​structure and fixedly connected by screws. The internal cavity of the housing is divided into an air supply cavity 103 and an air outlet cavity 104. The air supply cavity 103 is located at the rear of the housing, and the air outlet cavity 104 is located at the front of the housing, and the two are interconnected. Furthermore, in a front-to-back orthographic projection, the projection of the air supply cavity 103 completely falls within the projection of the air outlet cavity 104, ensuring that airflow flows from the air supply cavity to the air outlet cavity 104 without loss. A centrifugal fan 200 is installed inside the air supply cavity 103. The centrifugal fan 200 has a fan shaft, which is perpendicular to the first housing 101 and the second housing 102. A first air inlet 107 is provided on the upper side of the first housing 101, and a second air inlet 108 is provided on the lower side of the second housing 102. A first air inlet shroud 110 with filter holes is fixed to the outside of the first air inlet 107, and a second air inlet shroud 112 with filter holes is similarly fixed to the outside of the second air inlet 108. When the centrifugal fan 200 is working, the airflow enters axially through the first air inlet 107 and the second air inlet 108, and exits radially from its periphery.

[0054] In this embodiment, a generally rectangular first air outlet 109 is formed on the front side of the housing, and an elongated second air outlet 119 is formed on its lower side. The first air outlet 109 is adapted to guide airflow in a first direction, i.e., toward the neck area of ​​the vehicle occupant, and the second air outlet 119 is adapted to guide airflow in a second direction, i.e., toward the torso area of ​​the vehicle occupant. Four vertical rectifiers 113 are provided inside the air outlet cavity 104. The vertical rectifiers 113 are arranged parallel to the fan shaft and are formed by joining half-piece structures respectively formed on the first housing 101 and the second housing 102. One vertical edge of the vertical rectifier 113 extends to the inner side of the first air outlet 109, and the other vertical edge extends to the inner side of the second air outlet 119, so as to smoothly guide the radial airflow from the centrifugal fan 200 to the first air outlet 109 and the second air outlet 119 respectively, thereby rectifying the airflow and reducing eddies and wind resistance.

[0055] In this embodiment, the baffle assembly 300 includes a plate 301, a rotating shaft 302, a first stop end plate 303, and a second stop end plate 304. The plate 301 is rotatably disposed within the air outlet cavity 104 via its rotating shaft 302. The plate 301 and the rotating shaft 302 are integrally formed, and the rotating shaft 302 extends along the length direction of the plate 301. The housing is adapted to support the rotation of the first end 305 and the second end 306. The vertical rectifier plate 113 is axially distributed along the rotating shaft 302, and the vertical rectifier plate 113 also includes a shaft hole formed by the upper and lower halves of the structure being joined together, through which the rotating shaft 302 passes. The housing includes a first mounting base 105 and a second mounting base 106 symmetrically disposed on both sides of the air outlet cavity 104. A first end 305 and a second end 306 are integrally formed at both ends of the rotating shaft 302. A first stop plate 303 is disposed between the first end 305 and the rotating shaft 302, and a second stop plate 304 is disposed between the second end 306 and the rotating shaft 302. The first mounting base 105 is adapted to support the first end 305, and the second mounting base 106 is adapted to support the second end 306. The first stop plate 303 and the second stop plate 304 are rotatably disposed in the air outlet cavity 104, and they respectively abut against the first mounting base 105 and the second mounting base 106 to limit the axial movement of the baffle assembly 300.

[0056] In this embodiment, the plate 301 has two workstation positions, namely the first position and the second position. See also Figure 4 , 5 When plate 301 is in the first position, it is positioned perpendicular to the fan shaft, i.e., horizontally. Airflow is guided by plate 301 and can only be horizontally forward from the first air outlet 109, blowing towards the occupant's neck area. See also... Figure 7 When the plate 301 is in the second position, the plate 301 is rotated 45° from the first position and tilted. The airflow is guided by the inner wall of the plate 301 and the air outlet cavity 104, and can only be sent out tilted downward from the second air outlet 119, blowing towards the torso area of ​​the occupant.

[0057] In this embodiment, a grille 114 is pivotally connected to the first air outlet 109 via a pivot 302. The grille 114 includes a frame 1141 and horizontal grilles 1142 and vertical grilles 1143 arranged crisscrossingly within the frame 1141. The vertical grilles 1143 are aligned with the vertical rectifier plates 113 to ensure smooth airflow. In particular, when the plate 301 is in the first position, the end of the plate 301 is almost flush with the end of a horizontal grille 1142, forming a continuous guide surface, which is not only aesthetically pleasing but also optimizes aerodynamic performance.

[0058] In this embodiment, a guide slope 1191 is formed on the lower edge of the second air outlet 119. The guide slope 1191 extends outward / forward from top to bottom, so that the outlet area of ​​the second air outlet 119 gradually increases, which helps to guide the airflow to diffuse downward more gently. When the plate 301 is in the second position, its lower edge partially overlaps with the guide slope 1191, further ensuring the effect of downward airflow.

[0059] In this embodiment, the baffle assembly 300 includes a cylindrical aroma diffuser 307, which is coaxially arranged with the rotating shaft 302. The aroma diffuser 307 includes a communicating fragrance inlet section 371 and a fragrance dispersing section 372, with the fragrance dispersing section 372 located within the air outlet cavity 104. The first end 305 has a hollow structure and is used to form the fragrance inlet section 371 of the aroma diffuser 307. The first end 305 is coaxially connected to a user-operable drive knob 308, which is closably connected to a first end cap 309 suitable for closing the aroma diffuser 307, facilitating the replacement of the aroma carrier 373 inside the aroma diffuser 307.

[0060] In this embodiment, a positioning mechanism is provided to reliably lock the baffle assembly 300 at different positions and provide a good tactile feel. A stop post 401 is vertically disposed inside the first mounting base 105, with the side of the stop post 401 facing the first end 305. The outer peripheral surface of the first end 305 is machined to form a first cut surface 402 and a second cut surface 403. The first cut surface 402 and the second cut surface 403 are smoothly connected by a transition arc surface 404, which is centered on the axis of the rotating shaft 302. The positioning mechanism includes a first mating part 411 and a second mating part 412. The side of the stop post 401 is adapted to form the first mating part 411, and the first cut surface 402 and the second cut surface 403 are adapted to form the second mating part 412.

[0061] In this embodiment, see Figure 6 When the baffle assembly 300 rotates to the first position, the side of the stop post 401 forms surface contact with the first cut surface 402. When the baffle assembly 300 rotates to the second position, the side of the stop post 401 forms surface contact with the second cut surface 403. The stop post 401 and / or its end are made of a plastic material with a certain degree of elasticity, or have a slight interference fit during assembly, thereby providing the required elastic force.

[0062] During operation, the user rotates the drive knob 308. After overcoming the maximum static friction force between the side of the stop post 401 and the first cut surface 402 / second cut surface 403, the stop post 401 will slide along the transition arc surface 404 with slight elastic deformation until it slides into the next cut surface position with a "click". This design provides locking force and vibration resistance far exceeding that of traditional ball-and-ball locking mechanisms through surface contact. At the same time, the design of the transition arc surface 404 makes the torque change during the switching process smooth, and the operation is clear, gentle and durable.

[0063] In this embodiment, to further improve product reliability and prevent damage to the baffle assembly 300 due to accidental heavy-duty operation, a stop unit is also provided. The stop unit includes a first stop portion 501, a second stop portion 502, and a third stop portion 503. The first stop portion 501 is located at the connection between the air supply cavity 103 and the air outlet cavity 104, and has a horizontally arranged first stop plane 511. The second stop portion 502 is located on the inner side of the top of the air outlet cavity 104, and has an upper stop plane 521, an upper stop ramp 522, and an upper mating curved surface 523 suitable for connecting the two. The third stop portion 503 is located on the inner side of the bottom of the air outlet cavity 104, and has a continuous lower stop ramp 531 and a lower mating curved surface 532. The plate 301 is radially divided into an inner plate portion 311 located near the centrifugal fan 200 and an outer plate portion 312 located away from the centrifugal fan 200, with the two portions distributed symmetrically around the centrifugal fan 302. The plate 301 is connected to the centrifugal fan 302 through four sets of transition surfaces 313.

[0064] See Figure 7 When the plate 301 is in the first position, the lower surface of the inner plate 311 abuts against the first stop plane 511, while the upper surface of the outer plate 312 abuts against the upper stop plane 521, and the lower mating surface 532 is adapted to fit against one of its transition surfaces 313. This double abutment forms an extremely stable mechanical limit. When the plate 301 is in the second position, the upper surface of the inner plate 311 abuts against the upper stop inclined surface 522, the lower surface of the outer plate 312 abuts against the lower stop inclined surface 531, and the upper mating surface 523 is adapted to fit against another transition surface 313.

[0065] In this embodiment, a first control circuit board 115 and a second control circuit board 116 are also provided inside the housing. The first control circuit board 115 is located on the second mounting base 106 and integrates at least one switch for the user to control the start and stop of the centrifugal fan 200. The second control circuit board 116 is located inside the air supply cavity and integrates a power interface 1161. The second control circuit board 116 is electrically connected to the centrifugal fan 200, the first control circuit board 115, and the power supply. The second control circuit board 116 is adapted to receive instructions from the first control circuit board 115 to realize the fan start and stop control and control the power supply to power the centrifugal fan 200. The power supply can be a built-in lithium battery or an external vehicle power supply.

[0066] In this embodiment, Velcro straps 117 are also provided on both sides of the housing. The two Velcro straps 117 are wrapped around the headrest support rod, and after adjusting the tightness, they are glued and fixed to ensure that the front side of the fan faces the occupant's face and the lower side faces the occupant's torso.

[0067] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A car headrest fan, characterized in that, include The housing has an internally connected air supply cavity and an air outlet cavity. The air outlet cavity is provided with at least a first air outlet and a second air outlet. The first air outlet is adapted to guide the airflow in a first direction, and the second air outlet is adapted to guide the airflow in a second direction different from the first direction. An airflow generating device is disposed in the air supply cavity, and the airflow generating device is a centrifugal fan with axial air intake and radial air outlet; A baffle assembly includes a pivot and a plate, the plate being rotatably disposed on the air outlet cavity about the pivot, the plate having at least a first position and a second position, wherein: in the first position, the plate is adapted to guide airflow out only from the first air outlet; and in the second position, the plate is adapted to guide airflow out only from the second air outlet.

2. A car headrest fan according to claim 1, characterized in that, The first direction is configured toward the neck region of the vehicle occupant, and the second direction is configured toward the torso region of the vehicle occupant; and / or, the first air outlet is located on the front side of the housing, and the second air outlet is located on the lower side of the housing.

3. A car headrest fan according to claim 1 or 2, characterized in that, The plate also has at least one third position; in the third position, the plate is adapted to allow airflow to flow out from both the first air outlet and the second air outlet simultaneously.

4. A car headrest fan according to claim 1, characterized in that, It also includes a positioning mechanism adapted to provide a locking force so that the plate is held in a first position or a second position; the positioning mechanism includes a first mating part, a second mating part and an elastic element, one of the first mating part and the second mating part is disposed on the baffle assembly, the other of the first mating part and the second mating part is disposed on the housing, the first mating part or the second mating part is connected to the elastic element, and the first mating part and the second mating part cooperate to generate the locking force; When the plate is rotated, the first mating part and the second mating part interfere with each other, forcing the elastic element to deform to generate peak resistance; after passing the peak resistance point, the deformation of the elastic element is released, and the plate can switch between the first position and the second position.

5. A car headrest fan according to claim 4, characterized in that, The baffle assembly further includes an end cap disposed at the end of the rotating shaft, wherein: A stop post is provided inside the housing. The side of the stop post is adapted to form the first mating part. The outer peripheral surface of the end is formed with a first sectional surface and a second sectional surface adapted to form the second mating part. The elastic element is the elasticity of the material of the stop post and / or the end itself. When the plate is in the first position or the second position, the side of the stop post is in contact with the first sectional surface or the second sectional surface. Alternatively, the first mating part is a ball, the elastic element is a spring that abuts against the ball, and the second mating part is a groove formed at the end; when the plate is in the first position or the second position, the ball is engaged in one of the grooves.

6. A car headrest fan according to claim 4, characterized in that, It also includes a stop unit, which includes at least a first limiting surface and a second limiting surface distributed in the air outlet cavity, wherein: when the baffle assembly is rotated to the first position, the plate is adapted to abut against the first limiting surface to limit its further rotation; when the baffle assembly is rotated to the second position, the plate is adapted to abut against the second limiting surface to limit its further rotation.

7. A car headrest fan according to claim 1, characterized in that, At least one of the following conditions must be met: From a top-down projection perspective, the projection of the second air outlet is completely outside the projection of the rotation axis of the baffle assembly; When the baffle assembly is in the second position, from a top-down projection perspective, the projection of the first air outlet falls completely into the projection of the baffle assembly's plate body. From a front-to-back projection perspective, the projection of the air supply cavity falls completely within the projection of the air outlet cavity.

8. A car headrest fan according to claim 1, characterized in that, At least one vertical rectifier is provided inside the air supply cavity. The vertical rectifier is arranged parallel to the fan shaft of the centrifugal fan. The rotating shaft of the baffle assembly is rotatably supported on the vertical rectifier. One edge of the vertical rectifier extends to the first air outlet, and the other edge of the vertical rectifier extends to the second air outlet. The vertical rectifier is adapted to guide the airflow to the first air outlet and the second air outlet respectively and rectify it.

9. A car headrest fan according to claim 1, characterized in that, A grille is rotatably provided at the first air outlet, the grille including at least one horizontal grille plate, the plate in the first position being flush with one of the horizontal grille plates; and / or, the second air outlet includes a guide slope extending outward from top to bottom, the plate in the second position being at least partially overlapping the guide slope.

10. A car headrest fan according to claim 1, characterized in that, One end of the baffle assembly is provided with an aromatherapy cage, at least a portion of which extends into the air outlet cavity. The aromatherapy cage includes an openable and closable cover that protrudes from the housing.

Images