Car-compatible headrest fan

Abstract

A car-compatible headrest fan, characterized by the fact that it includes: a housing (1) having an air inlet (11) and an air outlet (12); a fan assembly (2) which is arranged inside the housing (1) and serves to allow an airflow to enter the housing (1) through the air inlet (11) and to exit through the air outlet (12); a fastening part (3) which is attached to the outside of the housing (1) and serves to make a connection with the headrest poles (20) of a vehicle seat in order to mount the car-compatible headrest fan between a headrest (30) and a backrest (40) of the vehicle seat.

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of headrest fans for cars, in particular a car-compatible headrest fan. STATE OF THE ART

[0002] With the continuous development of automotive technology, comfort features in vehicle interiors are attracting increasing consumer attention. In newer vehicles, especially electric vehicles, fans can be integrated into the seats to enhance comfort for drivers and passengers. However, conventional vehicles or older models often lack this feature. This poses a particular problem during hot summers: When driving for extended periods or spending time in the vehicle, cooling the interior temperature via the air conditioning system increases fuel consumption or reduces the range of electric vehicles. Raising the air conditioning temperature also reduces the comfort of the driver and passengers. Furthermore, long drives can lead to driver fatigue, necessitating an effective method of cooling to maintain driving safety.

[0003] Therefore, a good solution is needed for older vehicle models and conventional vehicles that allows targeted heat dissipation from the seats without having to lower the overall interior temperature via the air conditioning. Installation on the driver's seat could also have a refreshing effect. CONTENTS OF THE INSTRUCTION MANUAL

[0004] To overcome the shortcomings of the prior art, this utility model offers a headrest fan suitable for use in cars. The present utility model solves the technical problem through the following technical solution.

[0005] This utility model provides a car-compatible headrest fan comprising: a housing having an air inlet and an air outlet; a fan assembly arranged inside the housing, designed to allow an airflow to enter the housing through the air inlet and exit through the air outlet; a mounting part attached to the outside of the housing, designed to connect to the headrest posts of a vehicle seat in order to mount the car-compatible headrest fan between a headrest and a backrest of the vehicle seat. Advantageous effect of the utility model:

[0006] The utility model provides a car-compatible headrest fan. The car-compatible headrest fan is attached to the headrest posts of the vehicle seat via a mounting bracket, allowing the fan to be securely mounted between the headrest and the seat back. Due to its high adaptability, it is ideally suited for older vehicle models or conventional combustion engine vehicles, providing targeted heat dissipation to individual seats. The fan assembly is located inside the housing and draws in air through the air inlet and directs it precisely through the air outlet. This enables effective ventilation and heat dissipation for each passenger, thus increasing seating comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To clarify the technical solutions in the embodiments of this utility model, the drawings required to describe these embodiments are briefly explained below. The drawings in the following description show only some embodiments of this utility model. A person skilled in the field can derive further drawings from these without inventive step.

[0008] The utility model is further explained below with reference to the drawings and examples of its implementation. Fig. Figure 1 is a schematic representation of the overall structure of the first embodiment of the utility model. Fig. Figure 2 is an exploded view of the first embodiment of the utility model. Fig. Figure 3 is a schematic representation of a boundary plate of the first embodiment of the utility model. Fig. Figure 4 is a schematic representation of another embodiment of the utility model. Fig. Figure 5 is a representation of the operational status of a car-compatible headrest fan of the utility model, mounted between a headrest of a vehicle seat and a backrest of the vehicle seat. Fig. Figure 6 is a schematic representation of the overall structure of a second embodiment of the utility model. Fig. Figure 7 is a first exploded view of the second embodiment of the utility model. Fig. Figure 8 is a second exploded view of the second embodiment of the utility model. Fig. Figure 9 is a left-hand view of the second embodiment of the utility model. Fig. Figure 10 is a third exploded view of the second embodiment of the utility model. Fig. Figure 11 is a fourth exploded view of the second embodiment of the utility model. Fig. Figure 12 is a further schematic representation of the overall structure of the second embodiment of the utility model. Fig. Figure 13 is a sectional view along an extendable data cable module of the second embodiment of the utility model. Fig. Figure 14 is a block diagram of the utility model. DETAILED EXECUTION FORMS First Execution Example

[0009] See Fig. 1-2. A car-compatible headrest fan comprises a housing 1, a fan assembly 2, and a mounting part 3. The fan assembly 2 is arranged inside the housing 1. The housing 1 has an air inlet 11 and an air outlet 12. The fan assembly 2 serves to allow an airflow to enter the housing 1 through the air inlet 11 and exit through the air outlet 12. The mounting part 3 is attached to the outside of the housing 1. In the present embodiment, the mounting part 3 is attached to both sides of the housing 1 and serves to connect and fasten it to the headrest posts of a vehicle seat in order to mount the car-compatible headrest fan of the utility model between a headrest of the vehicle seat and a backrest of the vehicle seat.

[0010] In the present embodiment, the air inlet 11 is arranged on the upper and lower sides of the housing 1. The air outlet 12 is arranged on the side surfaces of the housing 1. The fan assembly 2 comprises at least two radial fans. The fan assembly 2 draws in an airflow from the upper and lower sides of the housing 1 and then expels it through the air outlet 12 on the side surfaces of the housing 1. Adjustable vanes 4 are attached to the air outlet 12 to adjust the discharge direction of the air outlet 12.

[0011] Furthermore, in this technical concept, the car-compatible headrest fan can be fixed to the headrest posts using the mounting part 3. The mounting part 3 has a flexible, band-like structure, for example, in the form of a hook-and-loop fastener, an elastic fastening ring, or a tie loop made of silicone or rubber material. This does not restrict the present embodiment, the main benefit being the ease of attachment and removal.

[0012] In another embodiment, the fastening part 3 can also be a C-shaped snap fastener made of plastic or formed integrally with the housing 1. The car-compatible headrest ventilator is clipped onto the headrest posts and thus secured by means of the opening groove of the C-shaped snap fastener.

[0013] See Fig. 2 and Fig. 3. In the present embodiment, a limiting plate 13 is also provided on the surface of the housing 1 on which the air inlet 11 is arranged. The limiting plate 13 primarily serves to prevent the air inlet 11 from being obstructed either by pressing down on the headrest of the vehicle seat or by the backrest of the vehicle seat. In the present embodiment, the surface of the limiting plate 13 is higher than the surface of the housing 1 with the air inlet 11, thus creating a gap between the limiting plate 13 and the surface of the housing 1 with the air inlet 11. A receptacle 14 is provided on the air inlet 11 for mounting the limiting plate 13, and a snap connection 15 is provided on an inner surface of the limiting plate 13.By appropriately arranging the receptacle 14 and the snap connection 15, the limiting plate 13 can be fixed above the air inlet 11 and simultaneously held at a defined distance from the air inlet 11.

[0014] See Fig. 4. In a further embodiment, a height limiter 16 can be arranged on the surface of the housing 1 on which the air inlet 11 is located, or the height limiter 16 can be arranged in the vicinity of the air inlet 11. This also serves the purpose of preventing the headrest from obstructing the air inlet 11.

[0015] Furthermore, the headrest fan comprises a power supply module, a control module, and a Bluetooth module. The power supply module is electrically connected to the control module, while the fan assembly and the Bluetooth module are connected to the control module via signal transmission. The Bluetooth module allows a connection to be established with a mobile device or the vehicle's on-board computer to switch the car-compatible headrest fan on or off and to adjust the fan speed.

[0016] When installing the car-compatible headrest fan according to this embodiment, the vehicle seat's headrest does not need to be completely removed. It is sufficient to lift the headrest enough to expose the headrest posts. After connecting the mounting bracket to the headrest posts, the headrest is pushed back into its normal position, and the fan is then ready for use. This method not only ensures easy installation and removal but can also enhance the driving comfort experience for both driver and passengers. Second embodiment

[0017] See Fig. 5 to Fig.14. A car-compatible headrest fan comprises: a housing 1 having an air inlet 11 and an air outlet 12; a fan assembly 2 arranged inside the housing 1 serving to allow an airflow to enter the housing 1 through the air inlet 11 and to exit through the air outlet 12; a mounting part 3 attached to the outside of the housing 1 serving to connect to the headrest posts 20 of a vehicle seat in order to mount the car-compatible headrest fan 10 between a headrest 30 and a backrest 40 of the vehicle seat.

[0018] The car-compatible headrest fan 10 is connected to the headrest posts 20 of the vehicle seat via the mounting part 3, allowing the fan to be stably mounted between the headrest 30 and the backrest 40. Due to its high adaptability, it is ideally suited for older vehicle models or conventional combustion engine vehicles to provide targeted heat dissipation to individual seats. The fan assembly 2 is located inside the housing 1 and draws in air through the air inlet 11 and directs it precisely through the air outlet 12. This enables effective ventilation and heat dissipation for the respective passenger, thus increasing seating comfort.

[0019] In the present embodiment, the length of the housing 1 ranges from 1 cm to 40 cm, the width of the housing 1 ranges from 1 cm to 25 cm, and the height of the housing 1 ranges from 1 cm to 15 cm. In a preferred embodiment, the housing 1 has a length of 19 cm, a width of 12 cm, and a height of 5 cm.

[0020] In the present embodiment, the mounting part 3 has an adjustable receiving space 31. The size of the receiving space 31 can be adjusted. Due to the design described above, the size of the receiving space 31 in the mounting part 3 is adjustable. This allows the car-compatible headrest fan 10 to adapt to headrest posts 20 of different vehicle models, diameters, or spacings, thus increasing its universality.

[0021] In the present embodiment, the fastening part 3 has a flexible, band-shaped structure. In another embodiment, the fastening part 3 can also be an elastic fastening ring or a binding loop.

[0022] In the present embodiment, the housing 1 comprises a left-hand end 111 and an opposite right-hand end 112. The fastening part 3 comprises a first clamping assembly 32. The first clamping assembly 32 has a first clamping chamber 321. The first clamping assembly 32 is arranged at the left-hand end 111, and the size of the first clamping chamber 321 is adjustable. Furthermore, the first clamping assembly 32 comprises a first clamping part 322 and a first counterpart 323. The first clamping part 322 and the first counterpart 323 are detachably connected to one another, thereby forming the first clamping chamber 321. Specifically, the first clamping part 322 comprises a first hook half of a hook-and-loop fastener, and the first counterpart 323 comprises a first loop half of a hook-and-loop fastener. The adjustable large first clamping space 321 is enclosed by a detachable connection between the first hook half of the Velcro strap and the first loop half.Alternatively, the first clamping part 322 includes the first hook and loop half and the first counterpart 323 includes the first hook and loop half; by a detachable connection of the first hook and loop half and the first loop half, the adjustable large first clamping space 321 is enclosed.

[0023] Furthermore, the fastening part 3 also includes a second clamping assembly 33. The second clamping assembly 33 is arranged at the right-hand end 112. The second clamping assembly 33 has a second clamping chamber 331, and the size of the second clamping chamber 331 is adjustable. The second clamping assembly 33 comprises a second clamping part 332 and a second counterpart 333. The second clamping part 332 and the second counterpart 333 are detachably connected to each other, thereby forming the second clamping chamber 331. The second clamping part 332 comprises a second hook half of the hook-and-loop fastener, and the second counterpart 333 comprises a second loop half of the hook-and-loop fastener. The adjustable size of the second clamping chamber 331 is enclosed by the detachable connection of the second hook half and the second loop half of the hook-and-loop fastener.Alternatively, the second clamping part 332 includes the second hook and loop half of the Velcro fastener and the second counterpart 333 includes the second hook and loop half of the Velcro fastener; the adjustable large second clamping space 331 is enclosed by a detachable connection of the second hook and loop half of the Velcro fastener and the second loop half of the Velcro fastener.

[0024] The design described above provides two adjustable clamping spaces, a first clamping space 321 and a second clamping space 331, on the left and right sides of the housing 1. Each clamping space is enclosed by a detachable hook-and-loop fastener. Due to the adjustability and reusability of the hook-and-loop fastener structure, the mounting element 3 can flexibly adapt to the spacing, diameter, or arrangement of the headrest posts of 20 different vehicle models. This ensures compatibility of the car-compatible headrest fan 10 with a wider range of vehicles and increases its adaptability. At the same time, the detachable hook-and-loop fastener connection guarantees extremely easy installation and removal of the clamping assemblies while maintaining a reliable clamping effect. A stable attachment is maintained both while driving and during vehicle vibrations.

[0025] Furthermore, the length of the first clamping element 322 is in the range of 1 cm to 10 cm, and the width of the first clamping element 322 is in the range of 0.5 cm to 5 cm; the length of the first counterpart 323 is in the range of 1 cm to 10 cm, and the width of the first counterpart 323 is in the range of 0.5 cm to 5 cm. In a preferred embodiment, the first clamping element 322 has a length of 4.5 cm and a width of 2 cm, and the first counterpart 323 has a length of 4.5 cm and a width of 2 cm.

[0026] The length of the second clamping part 332 is in the range of 1 cm to 10 cm, and the width of the second clamping part 332 is in the range of 0.5 cm to 5 cm; the length of the second counterpart 333 is in the range of 1 cm to 10 cm, and the width of the second counterpart 333 is in the range of 0.5 cm to 5 cm. In a preferred embodiment, the second clamping part 332 has a length of 4.5 cm and a width of 2 cm, and the second counterpart 333 has a length of 4.5 cm and a width of 2 cm.

[0027] The construction described above allows the appropriate dimensions of the Velcro fasteners of the car-compatible headrest fan 10 to be flexibly adapted to the distance, diameter or arrangement of the headrest poles 20 of different vehicle models, thus increasing its adaptability.

[0028] In the present embodiment, the utility model further comprises an upper stop plate 5. The air inlet 11 includes an upper air inlet 1101. The housing 1 has an upper end 113 and an opposing lower end 114. The upper air inlet 1101 is located at the upper end 113. The upper stop plate 5 is mounted above the upper air inlet 1101. The surface of the upper stop plate 5 is higher than a surface of the housing 1 on which the upper air inlet 1101 is located. This creates an upper air inlet gap 51 between the underside of the upper stop plate 5 and the surface of the housing 1 on which the upper air inlet 1101 is located. Furthermore, the housing 1 has a front end 115 and an opposing rear end 116. The air outlet 12 is located at the front end 115. The height of the upper air inlet gap 51 decreases continuously from the rear end 116 to the front end 115.Due to the design described above, the upper stop plate 5 is positioned above the upper air inlet 1101. This creates the upper air inlet gap 51 between the upper stop plate 5 and the surface of the housing 1, where the upper air inlet 1101 is located. This provides a stable inlet channel for the air, ensuring that a sufficient airflow volume can be maintained. This prevents insufficient airflow due to covers on the top. Furthermore, since the height of the upper air inlet gap 51 decreases continuously from the rear end 116 to the front end 115, the upper stop plate 5 forms a structure similar to a beveled guide surface. This effectively directs the air from back to front into the upper air inlet 1101, optimizing the flow direction and increasing the intake performance.

[0029] The area ratio of the upper air inlet 1101 to the total area of ​​the upper end 113 is in the range of 50% to 90%. In a preferred embodiment, the area ratio of the upper air inlet 1101 to the total area of ​​the upper end 113 is 75%. Due to the design described above, the area ratio between the upper air inlet and the upper end 113 of the housing 1 is within a suitable range, thereby increasing the intake capacity.

[0030] Furthermore, the upper air inlet gap 51 has a height in the range of 0.3 cm to 2 cm. Preferably, the height of the upper air inlet gap 51 is 0.8 cm. Due to the design described above, the height of the upper air inlet gap 51 is within a suitable range, which increases the intake performance. The larger the upper air inlet gap 51, the better the resulting air outlet effect.

[0031] Furthermore, the underside of the upper stop plate 5 is provided with several protruding first locking ribs 52. These first locking ribs 52 are arranged on the side of the upper stop plate 5 at the rear end 116. This design allows the first locking ribs 52 to form a multi-stage barrier structure in the upper air inlet gap 51. This effectively counteracts the ingress of dirt particles or hair from the direction of the seat backrest and simultaneously prevents children's fingers from entering the housing 1, thus ensuring safety. At the same time, the locking ribs form controlled guide gaps in the air duct. This allows the air to flow more smoothly and evenly between the ribs, further increasing the intake performance.

[0032] The present embodiment further comprises a lower stop plate 6. The air inlet 11 includes a lower air inlet 1102. The housing 1 has an upper end 113 and an opposite lower end 114. The lower air inlet 1102 is located at the lower end 114, and the lower stop plate 6 is positioned below the lower air inlet 1102. The surface of the lower stop plate 6 is lower than a surface of the housing 1 on which the lower air inlet 1102 is located. This creates a lower air inlet gap 61 between the upper surface of the lower stop plate 6 and the surface of the housing 1 on which the lower air inlet 1102 is located. The housing 1 has a front end 115 and an opposite rear end 116. The air outlet 12 is located at the front end 115. The height of the lower air inlet gap 61 decreases continuously from the rear end 116 to the front end 115.Furthermore, the upper surface of the lower stop plate 6 is provided with several projecting second locking ribs 62. The housing 1 has a front end 115 and an opposite rear end 116. The air outlet 12 is located at the front end 115. These second locking ribs 62 are arranged on the side of the lower stop plate 6 at the rear end 116. The lower air inlet gap 61 has a height in the range of 0.3 cm to 2 cm. In the preferred embodiment, the height of the lower air inlet gap 61 is 0.8 cm. Due to the design described above, the upper air inlet 1101 and the lower air inlet 1102 are arranged separately at the upper end 113 and the lower end 114 of the housing 1, and the upper stop plate 5 and the lower stop plate 6 are positioned at the corresponding locations to create a more stable and efficient dual-channel inlet structure.

[0033] In the present embodiment, the air outlet 12 has vertically pivotable, movable louvers 4. These movable louvers 4 serve to regulate the direction of the airflow. The pivot angle of the movable louvers 4 is within 20°. Due to the design described above, the vertically pivotable, movable louvers 4 attached to the air outlet 12 allow the user to adjust the airflow direction according to individual needs. This allows the airflow to be directed more precisely at the occupant, thus increasing user comfort. The pivot angle of the movable louvers 4 is within 20°, which on the one hand provides a sufficient control range for the airflow direction and on the other hand ensures a stable air volume. This contributes to an overall improved user experience.

[0034] In the present embodiment, the fan assembly 2 comprises a radial fan 21, which is oriented towards the air outlet 12. The radial fan 21 has a diameter of 5 cm to 10 cm. In a preferred embodiment, the diameter of the radial fan 21 is 7 cm. The design described above allows the intake air to be concentrated and directed to the air outlet 12, resulting in more efficient air delivery. The radial fan 21 offers a higher pressure output for the same volume. This allows air to be transported stably and quickly to the occupant's position, making it particularly suitable for confined installation scenarios such as in the automotive headrest 30.

[0035] The present embodiment further comprises a power supply module 7 and a control module 8. The power supply module 7, the control module 8, and the fan assembly 2 are electrically connected to each other. The housing 1 is also equipped with a mains input 71, which is electrically connected to the power supply module 7. This mains input 71 serves to selectively establish a connection to either a vehicle power source or an external power source in order to supply energy to the car-compatible headrest fan. The design described above, the arrangement of the power supply module 7 and the control module 8, and the integration of the mains input 71, which can be connected to either vehicle or external voltage, into the housing 1 enable the car-compatible headrest fan 10 to be compatible with various power supply types.It can be connected to the vehicle's power supply for charging while driving, and can also be used outdoors via an external power supply, increasing the flexibility and continuity of use.

[0036] In the present embodiment, a retractable data cable module 9 is further arranged inside the housing 1. The retractable data cable module 9 is electrically connected to the power supply module 7 and the control module 8. The retractable data cable module 9 comprises a retractable data cable 91, which has a cable connector 911. The housing 1 has a first feed-through opening 17. The retractable data cable 91 passes through the first feed-through opening 17 and remains at least partially outside the housing 1. The cable connector 911 serves to establish a detachable electrical connection with an external device, thus enabling power transmission between the car-compatible headrest fan 10 and the external device. The diameter of the first feed-through opening 17 is smaller than the diameter of the cable connector 911 to prevent the retractable data cable 91 from being fully retracted into the housing 1.The extendable data cable 91 has a length ranging from 10 cm to 300 cm. In the preferred embodiment, the length of the extendable data cable 91 is 150 cm.

[0037] The design described above allows the user to extend cable connector 911 and connect it to an external device. This enables power transfer between the car-compatible headrest fan 10 and the external device. In this way, it can power the occupants' electronic devices, effectively functioning as a power bank. This increases the multifunctionality of the car-compatible headrest fan 10. Since the diameter of the first feed-through opening 17 is smaller than the outer diameter of cable connector 911, the data cable cannot be fully retracted into the housing 1. This ensures the data cable remains readily available and easy to handle during use. Furthermore, the length of the extendable data cable 91, within the specified length range, covers most application scenarios, enhancing the product's user-friendliness.

[0038] In the present embodiment, a mounting housing 92 is provided in the housing 1. The mounting housing 92 has a pivot axis 921. The extendable data cable module 9 further comprises a cable drum 93, which is rotatably mounted on the pivot axis 921. The extendable data cable 91 is wound onto the cable drum 93. A return element 94 is arranged between the cable drum 93 and the mounting housing 92. The return element 94 serves to rotate the cable drum 93 in the opposite direction after the extendable data cable 91 has been extended, thus rewinding the extendable data cable 91 onto the cable drum 93. The housing 1 has an upper end 113 and an opposite lower end 114. At the upper end 113, a first recessed projection 18, corresponding to the mounting housing 92, is formed on the outside. The first recess projection 18 defines a first recess space 181.At the lower end 114, a second recess projection 19, corresponding to the mounting housing 92, is formed on the outside. The second recess projection 19 defines a second recess space 191. The first recess space 181 and the second recess space 191 together enclose a recess cavity 95, and the mounting housing 92 is arranged in the recess cavity 95. The outer wall of the housing 1 is also provided with a receiving notch 171, which is connected to the first feed-through opening 17. The cable connector 911 can be locked and stowed in the receiving notch 171. Furthermore, the first recess projection 18 rests against the inner wall of the upper stop plate 5, and the second recess projection 19 is pressed against the inner wall of the lower stop plate 6.

[0039] The above-described design, with its arrangement of the mounting housings 92 within the housing 1 and the rotatable cable drum 93 mounted on them, enables the winding and storage of the extendable data cable 91. After the user extends the data cable for use, the cable drum 93 rotates automatically due to the action of the return element 94, rewinding the data cable onto the cable drum 93 and thus providing an automatic retraction function. Furthermore, the first recess projection 18 and the second recess projection 19 are formed at the upper end 113 and lower end 114 of the housing 1. These define the first recess space 181 and second recess space 191 corresponding to the mounting housings 92, which together enclose the recess cavity 95.This allows the cable drum 93, including its return element, to operate freely within the cavity without being obstructed by the inner walls of the housing 1. Simultaneously, this results in a more rational and compact structural distribution within the housing 1 and contributes to a reduction in the housing 1's volume. Furthermore, a receiving notch 171, connected to the first feed-through opening 17, is provided on the outside of the housing 1. The cable connector 911 can be locked and stored in the receiving notch 171 to prevent it from coming loose. This further enhances the overall orderliness and safety of the entire assembly.

[0040] In the present embodiment, the housing 1 comprises the left end 111 and the opposite right end 112. The housing 1 further has a first stop 110 at the left end 111 and a second stop 120 at the right end 112. The first stop 110 and the second stop 120 are both located near one end of the air outlet 12. When the fastening part 3 is connected to the headrest posts 20 of the vehicle seat, the first stop 110 and the second stop 120 abut the front end of the headrest posts 20 of the vehicle seat. Specifically, the first stop 110 is a cylindrical first stop 110, and the second stop 120 is a cylindrical second stop 120.Furthermore, a switch button 81 is present, the switch button 81 is electrically connected to the power supply module 7 and the control module 8, and the switch button 81 is attached either to the outer wall of the first stop 110 or the outer wall of the second stop 120.

[0041] Due to the construction described above, the first stop 110 and the second stop 120, located near the air outlet 12, are positioned on the left and right sides of the housing 1, respectively. When the mounting part 3 is connected to the headrest posts 20 of the vehicle seat, the stops can rest against the front end of the headrest posts 20. This ensures that the position of the air outlet 12 is fixed in front of the headrest 30 and the seat back, thus reliably guaranteeing the precise discharge direction of the air outlet 12. Furthermore, the switch 81 is mounted on the outer surface of the first stop 110 or the second stop 120, allowing the user to conveniently press the switch 81 to turn the fan on or off. The design is both attractive and ergonomic.

[0042] The foregoing descriptions represent one or more embodiments provided in conjunction with the specific content. It is not assumed that the actual implementation of the utility model is limited exclusively to these descriptions. All approximations or correspondences with the methods, structures, etc., of this utility model, as well as all technical derivations or substitutions based on the concept of this utility model, are to be considered as falling within the scope of protection of this utility model.

Claims

[1] A car-compatible headrest fan, characterized by that it includes: a housing (1) having an air inlet (11) and an air outlet (12); a fan assembly (2) which is arranged inside the housing (1) and serves to allow an airflow to enter the housing (1) through the air inlet (11) and to exit through the air outlet (12); a fastening part (3) which is attached to the outside of the housing (1) and serves to make a connection with the headrest poles (20) of a vehicle seat in order to mount the car-compatible headrest fan between a headrest (30) and a backrest (40) of the vehicle seat. [2] A car-compatible headrest fan according to claim 1, characterized by that the fastening part (3) has a receiving space (31); the size of the receiving space (31) can be adjusted; the fastening part (3) has a flexible ribbon-shaped structure. [3] A car-compatible headrest fan according to claim 1, characterized by , that the housing (1) comprises a left-hand end (111) and an opposite right-hand end (112); the fastening part (3) comprises a first clamping assembly (32), the first clamping assembly (32) has a first clamping space (321), the first clamping assembly (32) is arranged at the left-hand end (111), and the size of the first clamping space (321) is adjustable; the first clamping assembly (32) comprises a first clamping part (322) and a first counterpart (323), the first clamping part (322) and the first counterpart (323) are detachably connected to each other, thereby forming the first clamping space (321). [4] A car-compatible headrest fan according to claim 3, characterized by, that the first clamping part (322) comprises a first hook half of a hook and loop fastener and the first counterpart (323) comprises a first loop half of a hook and loop fastener, the adjustable first clamping space (321) is enclosed by a detachable connection of the first hook half and the loop half; alternatively, the first clamping part (322) comprises the first loop half of a hook and loop fastener and the first counterpart (323) comprises the first hook half of a hook and loop fastener, the adjustable first clamping space (321) is enclosed by a detachable connection of the first hook half and the loop half of the hook and loop fastener; the length of the first clamping part (322) is in the range of 1 cm to 10 cm, the width of the first clamping part (322) is in the range of 0.5 cm to 5 cm; the length of the first counterpart (323) is in the range of 1cm to 10cm, the width of the first counterpart (323) is in the range of 0.5cm to 5cm. [5] A car-compatible headrest fan according to claim 3, characterized by, that the fastening part (3) further comprises a second clamping assembly (33), the second clamping assembly (33) being arranged at the right-hand end (112); the second clamping assembly (33) having a second clamping space (331), and the size of the second clamping space (331) being adjustable; the second clamping assembly (33) comprising a second clamping part (332) and a second counterpart (333); the second clamping part (332) and the second counterpart (333) being detachably connected to each other, thereby forming the second clamping space (331); the second clamping part (332) comprises a second hook-and-loop fastener half and the second counterpart (333) comprises a second loop-and-loop fastener half, the adjustable large second clamping space (331) being enclosed by a detachable connection of the second hook-and-loop fastener half and the second loop-and-loop fastener half; alternatively, the second clamping part (332) comprises the second loop-and-loop fastener half and the second counterpart (333) comprises the second hook-and-loop fastener half, the adjustable large second clamping space (331) being enclosed by a detachable connection of the second hook-and-loop fastener half and the second loop-and-loop fastener half; the length of the second clamping part (332) is in the range of 1cm to 10cm, the width of the second clamping part (332) is in the range of 0.5cm to 5cm; the length of the second counterpart (333) is in the range of 1cm to 10cm, the width of the second counterpart (333) is in the range of 0.5cm to 5cm. [6] A car-compatible headrest fan according to claim 1, characterized by , that it further comprises an upper stop plate (5); the air inlet (11) comprises an upper air inlet (1101); the housing (1) has an upper end (113) and an opposite lower end (114); the upper air inlet (1101) is arranged at the upper end (113); the upper stop plate (5) is mounted above the upper air inlet (1101); the surface of the upper stop plate (5) is higher than a surface of the housing (1) on which the upper air inlet (1101) is located, thereby creating an upper air inlet gap (51) between the underside of the upper stop plate (5) and the surface of the housing (1) on which the upper air inlet (1101) is located; the area fraction of the upper air inlet (1101) to the total area of ​​the upper end (113) is in the range of 50% to 90%; the housing (1) has a front end (115) and an opposite rear end (116); the air outlet (12) is located at the front end (115); the height of the upper air inlet gap (51) decreases continuously from the rear end (116) to the front end (115); the upper air inlet gap (51) has a height in the range of 0.3 cm to 2 cm; the length of the case (1) is in the range of 1cm to 40cm, the width of the case (1) is in the range of 1cm to 25cm, the height of the case (1) is in the range of 1cm to 15cm; the underside of the upper stop plate (5) is provided with several protruding first locking ribs (52), these first locking ribs (52) are arranged on the side of the upper stop plate (5) at the rear end (116). [7] A car-compatible headrest fan according to claim 1, characterized by, that it further comprises a lower stop plate (6); the air inlet (11) comprises a lower air inlet (1102); the housing (1) has an upper end (113) and an opposite lower end (114); the lower air inlet (1102) is arranged at the lower end (114); the lower stop plate (6) is attached below the lower air inlet (1102); the surface of the lower stop plate (6) is lower than a surface of the housing (1) on which the lower air inlet (1102) is located, thereby creating a lower air inlet gap (61) between the upper surface of the lower stop plate (6) and the surface of the housing (1) on which the lower air inlet (1102) is located; the housing (1) has a front end (115) and an opposite rear end (116), the air outlet (12) is located at the front end (115), the height of the lower air inlet gap (61) decreases continuously from the rear end (116) to the front end (115); the lower air inlet gap (61) has a height in the range of 0.3 cm to 2 cm; the upper surface of the lower stop plate (6) is provided with several protruding second locking ribs (62), these second locking ribs (62) are arranged on the side of the lower stop plate (6) at the rear end (116). [8] A car-compatible headrest fan according to claim 1, characterized bythat the air outlet (12) has vertically pivotable, movable louvers (4), these movable louvers (4) serve to regulate the discharge direction, the pivot angle of the movable louvers (4) is within 20°; the fan assembly (2) comprises a radial fan (21), the radial fan (21) is directed towards the air outlet (12); the radial fan (21) has a diameter in the range of 5 cm to 10 cm; it further comprises a power supply module (7) and a control module (8); the power supply module (7), the control module (8) and the fan assembly (2) are electrically connected to each other; the housing (1) is also equipped with a mains input (71), the mains input (71) is electrically connected to the power supply module (7); This network input (71) serves to optionally establish a connection to a vehicle power source or to an external power source in order to supply power to the car-compatible headrest fan. [9] A car-compatible headrest fan according to claim 8, characterized by, that inside the housing (1) a retractable data cable module (9) is further arranged, the retractable data cable module (9) is electrically connected to the power supply module (7) and the control module (8); the retractable data cable module (9) comprises a retractable data cable (91), the retractable data cable (91) has a cable connector (911); the housing (1) has a first feed-through opening (17), the retractable data cable (91) passes through the first feed-through opening 17 and remains at least partially outside the housing (1); the cable connector (911) serves to establish a detachable electrical connection with an external device in order to enable power transmission between the car-compatible headrest fan and the external device; the diameter of the first feed-through opening (17) is smaller than the diameter of the cable connector (911) in order to prevent the retractable data cable (91) from being fully retracted into the housing (1);the extendable data cable (91) has a length in the range of 10 cm to 300 cm; a mounting housing (92) is provided in the housing (1), the mounting housing (92) has a pivot axis (921), the extendable data cable module (9) further comprises a cable drum (93), the cable drum (93) is rotatably mounted on the pivot axis (921), the extendable data cable (91) is wound on the cable drum 93; a resetting element (94) is arranged between the cable drum (93) and the mounting housing (92), the resetting element (94) serves to rotate the cable drum (93) in the opposite direction after the extendable data cable (91) has been extended, thus rewinding the extendable data cable (91) onto the cable drum (93);the housing (1) has an upper end (113) and an opposite lower end (114), at the upper end (113) a first recess projection (18) corresponding to the mounting housing (92) is formed on the outside, the first recess projection (18) defining a first recess space (181); at the lower end (114) a second recess projection (19) corresponding to the mounting housing (92) is formed on the outside, the second recess projection (19) defining a second recess space (191); the first recess space (181) and the second recess space (191) together enclose a recess cavity (95), the mounting housing (92) is arranged in the recess cavity 95; the outer wall of the housing (1) is also provided with a receiving notch (171) which is connected to the first through-hole (17), so that the cable connector (911) can be locked and stowed in the receiving notch (171). [10] A car-compatible headrest fan according to claim 8, characterized by , that the housing (1) comprises a left-hand end (111) and an opposite right-hand end (112), the housing (1) further comprising a first stop (110) at the left-hand end (111) and a second stop (120) at the right-hand end (112); the first stop (110) and the second stop (120) are both located near one end of the air outlet (12); when the fastening part (3) is connected to the headrest posts (20) of the vehicle seat, the first stop (110) and the second stop (120) abut the front end of the headrest posts (20) of the vehicle seat; it furthermore has a switch button (81), the switch button (81) is electrically connected to the power supply module (7) and the control module (8), and the switch button (81) is attached either to the outer wall of the first stop (110) or to the outer wall of the second stop (120).

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