Headrest fan for vehicle

Abstract

The fan comprises a shell, a wind shielding piece, a switching device, a draught fan and a control panel, the shell is provided with two or more air outlets facing different directions, the draught fan is installed in the shell, the control panel controls the draught fan to work, the wind shielding piece is arranged in the shell, the switching device is arranged corresponding to the wind shielding piece, and the switching device is arranged corresponding to the wind shielding piece. The switching device drives the air blocking piece to be switched at different positions or states, so that air blown out by the fan can be blown out from different air outlets. The air blocking piece capable of being switched between different positions is arranged in the air blocking device, directional air supply in at least two directions can be achieved through cooperation with the fan, the air blocking device is switched to the first position when used by passengers in the front row, and airflow is only conveyed forwards and does not interfere with the rear row; when passengers in the back row use the ventilation device, the ventilation device is switched to the second position, airflow is only conveyed backwards, the front row has no direct blowing trouble, the independent ventilation requirement under different driving and riding scenes is met, in addition, the structure is extremely compact, and the ventilation device can be matched with the limited space of an automobile headrest.

Description

Technical Field

[0001] This invention discloses a fan, particularly a car headrest fan, belonging to the technical field of vehicle peripheral accessories. Background Technology

[0002] With the continuous upgrading of the demand for driving and riding comfort, in-vehicle local ventilation equipment has become a key component for improving the microenvironment inside the vehicle. Among them, car headrest fans are gradually becoming the mainstream configuration because they can directly ventilate and cool down areas such as the head and neck of drivers and passengers that are prone to stuffiness.

[0003] A car headrest fan is a portable cooling device used in cars, primarily installed in the headrest area of ​​the car seat to provide cool airflow to the back and neck of the driver and passengers. The car headrest fan uses a built-in small motor to drive the fan blades to rotate, generating airflow. Through a specific air duct design, the air is concentrated and blown onto the back and neck of the driver and passengers, thus achieving a cooling effect. It is especially suitable for use in summer. When the car's air conditioning is ineffective, or when the air conditioning is set to maximum and still cannot adequately cool the back and neck, the car headrest fan can effectively alleviate the stuffiness and provide a comfortable experience for drivers and passengers. It is particularly useful for those who frequently drive long distances.

[0004] However, most existing car headrest fans have a fixed airflow direction, such as facing only the front or only the rear seats, and cannot flexibly adjust the airflow target according to the driving and riding scenario. If separate fans are installed for the front and rear seats, it will increase the cost of use and the complexity of installation. Therefore, there is an urgent need for a car headrest fan with a compact structure that can flexibly switch the airflow direction to serve occupants in different positions. Summary of the Invention

[0005] In view of the shortcomings of the existing automotive headrest fans mentioned above, which have a fixed airflow direction and are not convenient to use, the present invention provides an automotive headrest fan that can easily adjust the airflow direction by switching the position of the internal wind deflector, thereby increasing the convenience of use.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a car headrest fan, the fan including a housing, a wind deflector, a switching device, a fan and a control board. The housing has two or more air outlets facing different directions. The fan is installed inside the housing. The control board controls the operation of the fan. The wind deflector is set inside the housing. The switching device is set corresponding to the wind deflector. The switching device drives the wind deflector to switch at different positions or states, so that the air blown by the fan can be blown out from different air outlets.

[0007] The technical solution adopted by the present invention to solve its technical problem further includes: The outer shell includes an upper shell and a lower shell, which are fitted together to form the outer shell.

[0008] The aforementioned fan is a centrifugal fan, with air inlets on the upper and lower sides of the casing.

[0009] A first air inlet cover is fixedly installed on the upper shell corresponding to the upper air inlet, and the first air inlet cover has a first air inlet hole.

[0010] The first air inlet cover is fixedly provided with a first screw hole, and a first threaded post is fixedly provided at the corresponding position on the upper shell. The first air inlet cover is fixedly installed on the upper shell by screws.

[0011] The first air inlet cover is fixedly provided with a first support foot, and a first limiting hole is opened at the corresponding position on the upper shell, with the first support foot located at the first limiting hole.

[0012] A second air inlet cover is fixedly installed on the lower shell corresponding to the lower air inlet, and a second air inlet hole is opened on the second air inlet cover.

[0013] The second air inlet cover is fixedly provided with a second screw hole, and a second threaded post is fixedly provided at the corresponding position on the lower shell. The second air inlet cover is fixedly installed on the lower shell by screws.

[0014] The second air inlet cover is fixedly provided with a second support foot, and a second limiting hole is opened at the corresponding position on the lower shell, with the second support foot located at the second limiting hole.

[0015] A fan mounting shaft is fixedly installed inside the lower shell, and the fan is mounted on the fan mounting shaft.

[0016] An air guide structure is provided on the outer casing at the position corresponding to the air outlet.

[0017] The air guide frame has an air guide plate inside, and air guide plate shafts are provided on the left and right sides of the air guide frame. The air guide frame is installed on the outer shell through the air guide frame shafts.

[0018] A lever is fixedly installed on the air guide frame.

[0019] The outer cover of the air guide frame is equipped with a decorative frame, and a buckle is fixedly installed on the decorative frame. A slot is opened at the corresponding position on the outer shell, and the buckle is engaged with the slot.

[0020] The windshield has an arc-shaped structure. The windshield body has a driven toothed part on its outside. The driven toothed part is densely covered with driven teeth. The driven teeth are evenly distributed around the center of the windshield. The switching device drives the windshield to rotate along its axis through a gear structure.

[0021] The main body of the windbreak component is equipped with an arc-shaped air guide plate, which is in the shape of an Archimedean spiral. The polar coordinate equation of the Archimedean spiral is r=a+bθ. The pole of the Archimedean spiral is set coaxially with the central axis of the fan. r represents the distance from any point on the arc-shaped air guide plate to the pole. a represents the distance from the starting point of the arc-shaped air guide plate to the pole at the corresponding position at the starting end. b is a real number that controls the density of the spiral. θ represents the angle swept from the starting point to point r.

[0022] The windbreak component has an arc-shaped rotating slide rail at its bottom, and a corresponding rotating slide groove inside the outer shell, with the rotating slide rail positioned within the rotating slide groove. One or more protrusions are provided within the rotating slide groove, and these protrusions are evenly distributed circumferentially within the groove.

[0023] The bottom of the rotating slide rail is provided with an arc-shaped limiting groove, and a limiting post is fixedly installed in the rotating slide groove. The limiting post is inserted into the limiting groove.

[0024] The windshield is equipped with two or more magnets, and Hall effect electronic components are provided at corresponding positions on the circuit board.

[0025] The wind deflector is installed around the fan, and the axis of the wind deflector is coaxial with the axis of the fan.

[0026] The main body of the switching device is cylindrical, and the outer side of the switching device is evenly distributed with drive teeth. The drive teeth mesh with the driven teeth on the windshield. The switching device is provided with knob shafts at the top and bottom respectively. The switching device is installed in the housing through the knob shafts, and part of it is exposed on the outside of the housing.

[0027] The switching device includes a drive motor and a drive gear. The drive gear is fixedly mounted on the motor shaft of the drive motor and meshes with the driven toothed part on the windshield. The drive motor is electrically connected to the circuit board.

[0028] A switching button is installed inside the housing, and the switching button is electrically connected to the circuit board.

[0029] The casing contains a switching control board, and the switching button is mounted on the switching control board. The switching control board is electrically connected to the circuit board.

[0030] A switch keycap is installed on the outer casing at the position corresponding to the switch button.

[0031] The circuit board is equipped with a switch button, and a switch cap is installed on the outer casing at the position corresponding to the switch button.

[0032] The circuit board is equipped with a power supply interface.

[0033] The upper shell has a first notch, and the lower shell has a second notch. The first and second notches are arranged opposite to each other to form an installation position, and a fixing device is installed at the installation position.

[0034] The aforementioned fixing device is provided in two parts, namely a first fixing device and a second fixing device, which are arranged opposite to each other.

[0035] The first and second fixing devices are selected from Velcro straps.

[0036] The beneficial effects of this invention are: the invention is equipped with a wind deflector that can be switched between different positions. When used in conjunction with a fan, it can achieve directional airflow in at least two directions. When front-seat occupants use it, they can switch to the first position, and the airflow is only delivered forward without disturbing the rear seats. When rear-seat occupants use it, they can switch to the second position, and the airflow is only delivered backward, so there is no direct airflow to the front seats. This meets the independent ventilation needs of different driving and riding scenarios. In addition, the structure is extremely compact, allowing the product to fit into the limited space of the car headrest.

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention.

[0039] Figure 2 This is a schematic diagram of the decomposed state structure of Embodiment 1 of the present invention.

[0040] Figure 3 This is a schematic diagram of the three-dimensional structure from a second perspective in Embodiment 1 of the present invention.

[0041] Figure 4 This is a schematic diagram of the second-view decomposed state structure of Embodiment 1 of the present invention.

[0042] Figure 5 This is a top view of the internal first state structure of Embodiment 1 of the present invention.

[0043] Figure 6 This is a top view of the internal second state structure of Embodiment 1 of the present invention.

[0044] Figure 7 This is a top view of the windshield component in this invention.

[0045] Figure 8 This is a bottom view of the windshield structure in this invention.

[0046] Figure 9 This is a three-dimensional structural diagram of Embodiment 1 of the present invention.

[0047] Figure 10This is a schematic diagram of the decomposed state structure of Embodiment 1 of the present invention.

[0048] Figure 11 This is a schematic diagram of the three-dimensional structure from a second perspective in Embodiment 1 of the present invention.

[0049] Figure 12 This is a schematic diagram of the second-view decomposed state structure of Embodiment 1 of the present invention.

[0050] Figure 13 This is a top view of the internal first state structure of Embodiment 1 of the present invention.

[0051] Figure 14 This is a top view of the internal second state structure of Embodiment 1 of the present invention.

[0052] In the diagram, 1-outer shell, 11-upper shell, 111-first notch, 112-first threaded post, 113-first limiting hole, 114-first slot, 115-upper air inlet, 12-lower shell, 121-second notch, 122-second threaded post, 123-second limiting hole, 124-second slot, 125-rotating slide, 126-limiting post, 127-fan mounting shaft, 128-protrusion, 129-lower air inlet, 13-first air inlet cover, 131-first air inlet hole, 132-first screw hole, 133-first support foot, 14-second air inlet cover, 141-second air inlet hole, 142-second screw hole, 143-second support foot, 15-first air guide frame, 151-first air guide plate, 152-first lever, 153-first air guide frame shaft, 16-second 161-Second air guide plate, 162-Second lever, 163-Second air guide plate shaft, 17-First decorative frame, 171-First buckle, 18-Second decorative frame, 181-Second buckle, 2-Wind deflector, 21-Driven toothed part, 22-Arc-shaped air guide plate, 23-Slide rail, 24-First magnet, 25-Second magnet, 26-First magnet mounting slot, 27-Second magnet mounting slot, 28-Limiting slot, 29-Starting end, 3-Switching device, 31-Drive toothed part, 32-Knob shaft, 33-Drive motor, 34-Drive gear, 4-Fan, 5-Circuit board, 51-Switch button, 52-Switch keycap, 53-Power supply interface, 54-Switch control board, 55-Switch button, 56-Switch keycap, 61-First fixing device, 62-Second fixing device. Detailed Implementation

[0053] This embodiment is a preferred embodiment of the present invention. All other embodiments that are the same as or similar to this embodiment in principle and basic structure are within the protection scope of the present invention.

[0054] Please refer to the appendix for details. Figure 1 To be continued Figure 14This invention mainly protects a car headrest fan, which mainly includes a housing 1, a wind deflector 2, a switching device 3, a fan 4, and a control board 5. The housing 1 has two or more air outlets facing different directions. The fan 4 is installed inside the housing. The control board 5 controls the operation of the fan 4. The wind deflector 2 is set inside the housing 1. The switching device 3 is set corresponding to the wind deflector 2. The switching device 3 can drive the wind deflector 2 to switch at different positions or states, so that the air blown by the fan 4 can be blown out from different air outlets.

[0055] In this embodiment, the outer shell 1 includes an upper shell 11 and a lower shell 12. The upper shell 11 and the lower shell 12 are installed together by screws to form the outer shell 1 structure. In specific implementation, the outer shell 1 can also take other forms, such as a left-right structure or a main body combined with a cover plate structure.

[0056] In this embodiment, the fan 4 is a centrifugal fan, which is more suitable for use in flat, small spaces. In specific implementations, other forms can also be used, such as axial flow fans, mixed flow fans, crossflow fans, etc., with corresponding adjustments to their installation structure. Since the fan 4 is a centrifugal fan, the optimal air intake direction is the top and bottom sides. Therefore, in this embodiment, the air inlets on the outer casing 1 are located on the top and bottom sides. In specific implementations, the air inlets can also be located only at the top or bottom, which will result in a slightly worse air intake effect, but will not affect the use.

[0057] In this embodiment, a first air inlet cover 13 is fixedly installed on the upper shell 11 corresponding to the upper air inlet 115. The first air inlet cover 13 has a first air inlet hole 131, which can block paper scraps, hair and other debris from entering the interior of the invention and affecting the operation of the fan 4. At the same time, the first air inlet cover 13 can also play a certain blocking role to prevent the fabric, leather and other materials on the vehicle seat from blocking the upper air inlet 115 and affecting the air intake effect. Of course, due to the blocking effect of the first air inlet cover 13, it can also prevent the hair of the driver and passengers from being sucked into the invention.

[0058] In this embodiment, a first screw hole 132 is fixedly provided on the first air inlet cover 13, and a first threaded post 112 is fixedly provided on the upper shell 11 at the corresponding position. The first air inlet cover 13 is fixedly installed on the upper shell 11 by screws. In specific implementation, other installation methods can also be used for installation.

[0059] In this embodiment, a first support foot 133 is fixedly provided on the first air inlet cover 13, and a first limiting hole 113 is provided at the corresponding position on the upper shell 11. During installation, the first support foot 133 can be aligned with the first limiting hole 113 for installation. The first air inlet cover 13 is supported by the first support foot 133 to a certain distance, which can make the air intake smoother.

[0060] In this embodiment, a second air inlet cover 14 is fixedly installed on the lower shell 12 corresponding to the lower air inlet 129. The second air inlet cover 14 has a second air inlet hole 141, which can block paper scraps, hair and other debris from entering the interior of the invention and affecting the operation of the fan 4. At the same time, the second air inlet cover 14 can also play a certain blocking role to prevent the fabric, leather and other materials on the vehicle seat from blocking the lower air inlet 129 and affecting the air intake effect. Of course, due to the blocking effect of the second air inlet cover 14, it can also prevent the hair of the driver and passengers from being sucked into the invention.

[0061] In this embodiment, a second screw hole 142 is fixedly provided on the second air inlet shroud 14, and a second threaded post 122 is fixedly provided at the corresponding position on the lower shell 12. The second air inlet shroud 14 is fixedly installed on the lower shell 12 by screws. In specific implementation, other installation methods can also be used for installation.

[0062] In this embodiment, a second support foot 143 is fixedly provided on the second air inlet cover 14, and a second limiting hole 123 is provided at the corresponding position on the lower shell 12. During installation, the second support foot 143 can be aligned with the second limiting hole 123 for installation. The second air inlet cover 14 is supported by the second support foot 143 to a certain distance, which can make the air intake smoother.

[0063] In this embodiment, a fan mounting shaft 127 is fixedly installed inside the lower shell 12, and the fan 4 is installed on the fan mounting shaft 127. The fan 4 and the fan mounting shaft 127 are coaxially arranged, which is defined as the X-axis in this invention.

[0064] An air guide frame structure is provided on the outer casing 1 at the position corresponding to the air outlet. In this embodiment, two air outlets are used as an example for explanation. A first air guide frame 15 is installed at the position of the first air outlet, and a second air guide frame 16 is installed at the position of the second air outlet. In specific implementation, if more air outlets are provided, corresponding air guide frames can also be provided for the corresponding air outlets.

[0065] In this embodiment, a first air guide plate 151 is provided inside the first air guide frame 15, and a first air guide frame shaft 153 is provided on the left and right sides of the first air guide frame 15. The first air guide frame 15 is mounted on the outer shell 1 through the first air guide frame shaft 153, so that the first air guide frame 15 can swing up and down along the first air guide frame shaft 153. Thus, under the action of the first air guide plate 151, the air outlet direction can be adjusted up and down, making the user more comfortable.

[0066] In this embodiment, the first air guide plate 151 is fixed. In specific implementation, the first air guide plate 151 can also be installed in the first air guide frame 15 through a rotating shaft structure at both the upper and lower ends, thereby also realizing the left and right air outlet adjustment.

[0067] In this embodiment, a first lever 152 is fixedly installed on the first air guide frame 15. The first lever 152 can be installed on the first air guide plate 151 or other convenient operation positions on the first air guide frame 15. The direction of the first air guide frame 15 can be adjusted by moving the first lever 152.

[0068] In this embodiment, the first air guide shaft 153 is arranged on the left and right sides of the first air guide 15. In specific implementation, the first air guide shaft 153 can also be arranged on the upper and lower sides of the first air guide 15 to adjust the left and right air outlet of the first air guide 15.

[0069] In this embodiment, the first air guide frame 15 is covered with a first decorative frame 17, which makes the whole invention more beautiful and can also protect the first air guide frame 15. A first buckle 171 is fixedly provided on the first decorative frame 17, a first slot 114 is provided at the corresponding position on the upper shell 11, and a second slot 124 is provided at the corresponding position on the lower shell 12. The first buckle 171 is engaged with the first slot 114 and the second slot 124.

[0070] In this embodiment, a second air guide plate 161 is provided inside the second air guide frame 16, and a second air guide frame shaft 163 is provided on the left and right sides of the second air guide frame 16. The second air guide frame 16 is mounted on the outer shell 1 through the second air guide frame shaft 163, so that the second air guide frame 16 can swing up and down along the second air guide frame shaft 163. Thus, under the action of the second air guide plate 161, the air outlet direction can be adjusted up and down, making the user more comfortable.

[0071] In this embodiment, the second air guide plate 161 is fixed. In specific implementation, the second air guide plate 161 can also be installed in the second air guide frame 16 through a rotating shaft structure at both the upper and lower ends, thereby also realizing the left and right air outlet adjustment.

[0072] In this embodiment, a second lever 162 is fixedly installed on the second air guide frame 16. The second lever 162 can be installed on the second air guide plate 161 or other convenient operation positions on the second air guide frame 16. The direction of the second air guide frame 16 can be adjusted by moving the second lever 162.

[0073] In this embodiment, the second air guide shaft 163 is arranged on the left and right sides of the second air guide 16. In specific implementation, the second air guide shaft 163 can also be arranged on the upper and lower sides of the second air guide 16 to adjust the left and right air outlet of the second air guide 16.

[0074] In this embodiment, the second air guide frame 16 is covered with a second decorative frame 18. The structure and installation structure of the second decorative frame 18 are the same as those of the first decorative frame 17, and will not be described again here.

[0075] In this embodiment, the wind deflector 2 is preferably arc-shaped, which is more conducive to adjusting and guiding the wind direction. A driven toothed portion 21 is provided on the outer side of the main body of the wind deflector 2. Driven teeth are densely distributed on the driven toothed portion 21, and these teeth are evenly distributed circumferentially around the center of the wind deflector 2. The switching device 3 drives the wind deflector 2 to rotate along its axis via a gear structure. In this embodiment, the opening angle of the wind deflector 2 is preferably 120°~150°.

[0076] In this embodiment, an arc-shaped air guide plate 22 is provided inside the main body of the wind deflector 2. The arc-shaped air guide plate 22 is in the shape of an Archimedean spiral, which is more conducive to air outlet and makes the air outlet effect better. The polar coordinate equation of the Archimedean spiral is r=a+bθ. In this embodiment, the pole of the Archimedean spiral is the same point as the central axis of the fan 4. Then r represents the distance from any point on the arc-shaped air guide plate 22 to the pole (that is, the center of the fan 4). a represents the distance from the starting point of the arc-shaped air guide plate 22 at the position corresponding to the starting end 29 to the pole (that is, the center of the fan 4). b is a real number that controls the distance between adjacent curves in each circle (that is, controls the curve density). In this embodiment, b takes the value of 1~3. θ represents the angle swept from the starting point (that is, the angle corresponding to point r). When calculating, the angle value should be converted into a radian value.

[0077] In this embodiment, the bottom of the windshield 2 is provided with an arc-shaped rotating slide rail 23, and the lower shell 12 is provided with a corresponding rotating slide groove 125. The rotating slide rail 23 is disposed in the rotating slide groove 125, allowing the windshield 2 to slide within the rotating slide groove 125. In this embodiment, in order to reduce the friction between the windshield 2 and the lower shell 12, one or more protrusions 128 are provided in the rotating slide groove 125. The protrusions 128 are preferably evenly distributed circumferentially within the rotating slide groove 125, thereby converting the surface friction between the windshield 2 and the lower shell 12 into point friction, which can effectively reduce friction and make the sliding smoother. In specific implementation, if the protrusions 128 are replaced with bearings, the sliding will be smoother, but the product cost will increase.

[0078] In this embodiment, an arc-shaped limiting groove 28 is provided at the bottom of the rotating slide rail 23, and a limiting post 126 is fixedly provided in the rotating slide groove 125. The limiting post 126 is inserted into the limiting groove 28. When the wind deflector 2 slides, it will stop when the edge of the limiting groove 28 touches the limiting post 126, thus preventing the wind deflector 2 from rotating excessively.

[0079] In this embodiment, the wind deflector 2 is embedded with two or more magnets, preferably the same number as the number of air outlets. In this embodiment, two magnets are used as an example: a first magnet 24 and a second magnet 25. The wind deflector 2 has a first magnet mounting groove 26 and a second magnet mounting groove 27. The first magnet 24 is fixedly installed in the first magnet mounting groove 26, and the second magnet 25 is fixedly installed in the second magnet mounting groove 27. The first magnet 24 and the second magnet 25 form a 180° angle. The first magnet 24 and the second magnet 25 can respectively correspond to the Hall electronic elements on the circuit board 5, thus forming a Hall switch. The fan 4 will only be activated when the first magnet 24 or the second magnet 25 is aligned with the Hall electronic elements on the circuit board 5, to prevent the wind from blowing in other directions when adjusting the position of the wind deflector 2. In specific implementations, the number of magnets can also be set according to actual needs, and the specific placement of the magnets can be coordinated with the direction of the air outlets.

[0080] In this embodiment, the wind deflector 2 is preferably in the shape of an arc. The wind deflector 2 is disposed around the fan 4. Preferably, the axis of the wind deflector 2 is coaxial with the axis of the fan 4, thus forming a wind cavity structure between the wind deflector 2 and the fan 4. The opening position of the wind deflector 2 is the air outlet of the wind cavity. By adjusting the position of the wind deflector 2, the orientation of the air outlet of the wind cavity can be adjusted. When the air outlet of the wind cavity is aligned with the air outlet of the outer casing 1, the air blown by the fan 4 will be blown out from the corresponding air outlet of the outer casing 1.

[0081] In this invention, the switching device 3 is available in both manual and electric forms, which are described below: Example 1: In this example, the switching device 3 is operated manually. The main body of the switching device 3 is cylindrical. The outer side of the switching device 3 is evenly distributed with drive teeth 31. The drive teeth 31 mesh with the driven teeth 21 on the windshield 2. The switching device 3 is provided with knob shafts 32 at the top and bottom respectively. The switching device 3 is installed in the outer shell 1 through the knob shafts 32, and part of it is exposed on the outer side of the outer shell 1. When in use, the switching device 3 is manually rotated, and the windshield 2 is driven to rotate through the drive teeth 31.

[0082] Example 2: In this example, the switching device 3 is electrically powered. The switching device 3 includes a drive motor 33 and a drive gear 34. The drive gear 34 is fixedly mounted on the motor shaft of the drive motor 33. The drive gear 34 meshes with the driven toothed part 21 on the wind deflector 2. The drive motor 33 is electrically connected to the circuit board 5. The drive motor 33 drives the drive gear 34 to rotate, and the drive gear 34 drives the wind deflector 2 to rotate.

[0083] In this embodiment, a switching button 55 is installed inside the outer casing 1. The switching button 55 is electrically connected to the circuit board 5. Pressing the switching button 55 controls the rotation of the drive motor 33.

[0084] In this embodiment, a switching control board 54 is installed inside the housing 1, and a switching button 55 is installed on the switching control board 54. The switching control board 54 is electrically connected to the circuit board 5. A switching keycap 56 is installed on the housing 1 at the position corresponding to the switching button 55. In specific implementation, the switching button 55 can also be directly set on the circuit board 5.

[0085] In this embodiment, a switch button 51 is installed on the circuit board 5, and a switch cap 52 is installed on the outer casing 1 at the position corresponding to the switch button 51. The switch cap 52 can be pressed to activate the switch button 51, thereby turning the device on or off. The circuit board 5 is provided with a power supply interface 53, which can be directly powered by an external power source, or a built-in lithium battery can be installed inside the outer casing 1 to power the fan 4 and the drive motor 33, while the power supply interface 53 powers the lithium battery.

[0086] In this embodiment, a first notch 111 is provided on the upper shell 11, and a second notch 121 is provided on the lower shell 12. The first notch 111 and the second notch 121 are arranged opposite to each other to form an installation position. A fixing device is installed at the installation position. In this embodiment, there are two fixing devices, namely a first fixing device 61 and a second fixing device 62. The first fixing device 61 and the second fixing device 62 are arranged opposite to each other. The present invention can be installed on a vehicle seat through the first fixing device 61 and the second fixing device 62. The first fixing device 61 and the second fixing device 62 can be Velcro straps. In specific implementation, hooks or other devices that can be used for fixing can also be used.

[0087] The above embodiments and accompanying drawings use the structure of two air vents (front and rear) as an example for illustration. In actual implementation, more air vents can be set according to the actual situation, such as: facing the driver's seat, facing the front passenger seat, facing the left rear passenger, facing the middle rear passenger, facing the right rear passenger, etc. The basic structure is the same as the above embodiments.

[0088] When in use, the present invention is installed on the headrest guide rod (or headrest support) of the vehicle by means of the first fixing device 61 and the second fixing device 62, so that its air outlet faces forward and backward respectively.

[0089] Press switch button 51 to start fan 4 and blow air.

[0090] When it is necessary to switch the air outlet direction, simply rotate the switching device 3 manually or press the switching button 55 to rotate the wind deflector 2 to switch the air outlet direction.

[0091] This invention features a wind deflector that can switch between different positions. When used in conjunction with a fan, it can achieve directional airflow in at least two directions. When front-seat occupants use it, they can switch to the first position, where the airflow is only directed forward and does not interfere with the rear seats. When rear-seat occupants use it, they can switch to the second position, where the airflow is only directed backward and the front seats are not bothered by direct airflow. This meets the independent ventilation needs of different driving and riding scenarios. In addition, the structure is extremely compact, allowing the product to fit into the limited space of a car headrest.

Claims

1. A headrest fan for a vehicle, characterized by: The fan comprises a shell (1), a wind blocking piece (2), a switching device (3), a fan (4) and a control board (5), two or more air outlets are formed on the shell (1) and face different directions, the fan (4) is installed in the shell (1), the control board (5) controls the working of the fan (4), the wind blocking piece (2) is arranged in the shell (1), the switching device (3) is arranged corresponding to the wind blocking piece (2), the wind blocking piece (2) is switched in different positions or states by the switching device (3), and the wind blown by the fan (4) can be blown out from different air outlets.

2. The headrest fan of claim 1, wherein: The shell (1) comprises an upper shell (11) and a lower shell (12), the upper shell (11) and the lower shell (12) are installed together in a matched mode to form the shell (1).

3. The headrest fan of claim 1, wherein: The wind blocking piece (2) is in an arc structure, a driven tooth-shaped part (21) is arranged on the outer part of the wind blocking piece (2), a plurality of driven teeth are densely arranged on the driven tooth-shaped part (21), the driven teeth are arranged in a circumferential uniform distribution mode with the center of the wind blocking piece (2) as an axis, and the switching device (3) drives the wind blocking piece (2) to rotate along the axis by a gear structure.

4. The headrest fan of claim 1, wherein: An arc-shaped air guide plate (22) is arranged in the inner part of the wind blocking piece (2), the arc-shaped air guide plate (22) is in an Archimedes spiral line shape, the polar equation of the Archimedes spiral line is r=a+bθ, the polar point of the Archimedes spiral line is coaxially arranged with the central axis of the fan (4), r represents the distance from an arbitrary point on the arc-shaped air guide plate (22) to the polar point, a represents the distance from the starting point of the arc-shaped air guide plate (22) at the corresponding position of the starting end (29) to the polar point, b is a real number, the density of the spiral line is controlled, and θ represents the angle corresponding to the scanning of the starting point to the r point.

5. The headrest fan of claim 1, wherein: An arc-shaped rotating slide rail (23) is arranged at the bottom of the wind blocking piece (2), a corresponding rotating slide groove (125) is arranged in the shell (1), the rotating slide rail (23) is arranged in the rotating slide groove (125), one or more protrusions (128) are arranged in the rotating slide groove (125) and are arranged in a circumferential uniform distribution mode, an arc-shaped limiting groove (28) is arranged at the bottom of the rotating slide rail (23), and a limiting column (126) is fixedly arranged in the rotating slide groove (125) and is inserted into the limiting groove (28).

6. The headrest fan of claim 1, wherein: Two or more magnets are embedded on the wind blocking piece (2), and a Hall electronic element is arranged at a corresponding position on the circuit board (5).

7. The headrest fan of claim 1, wherein: The fan (4) is a centrifugal fan, air inlets are formed on the upper and lower sides of the shell (1), the wind blocking piece (2) is arranged around the fan (4), the axis of the wind blocking piece (2) is coaxially arranged with the axis of the fan (4), and a fan mounting shaft (127) is fixedly arranged in the shell (1), and the fan (4) is mounted on the fan mounting shaft (127).

8. The headrest fan of claim 1, wherein: The switching device (3) is cylindrical, and driving toothed portions (31) are uniformly distributed on the circumference of the switching device (3). The driving toothed portions (31) are engaged with the driven toothed portions (21) on the wind shield (2). The switching device (3) is provided with rotary shafts (32) on the top and bottom, respectively. The switching device (3) is installed in the shell (1) through the rotary shafts (32) and has a part exposed outside the shell (1). Alternatively, the switching device (3) comprises a driving motor (33) and a driving gear (34). The driving gear (34) is fixedly installed on the motor shaft of the driving motor (33). The driving gear (34) is engaged with the driven toothed portions (21) on the wind shield (2). The driving motor (33) is electrically connected with the circuit board (5). The shell (1) is installed with a switching button (55). The switching button (55) is electrically connected with the circuit board (5). The shell (1) is installed with a switching control board (54). The switching button (55) is installed on the switching control board (54). The switching control board (54) is electrically connected with the circuit board (5). The shell (1) is installed with a switching key cap (56) corresponding to the position of the switching button (55).

9. The headrest fan of claim 2, wherein: The upper shell (11) is fixedly installed with a first air inlet cover (13) corresponding to the upper air inlet (115). The first air inlet cover (13) is provided with a first air inlet hole (131). And / or, the lower shell (12) is fixedly installed with a second air inlet cover (14) corresponding to the lower air inlet (129). The second air inlet cover (14) is provided with a second air inlet hole (141).

10. The headrest fan of claim 1, wherein: The shell (1) is provided with a wind guide frame structure corresponding to the air outlet position. And / or, the shell (1) is installed with a fixing device. And / or, the circuit board (5) is installed with a switch button (51). The shell (1) is installed with a switch key cap (52) corresponding to the position of the switch button (51). The circuit board (5) is provided with a power supply interface (53).

Images