Automobile seat headrest

Abstract

The present invention provides a car seat headrest, which includes a basic module made of foamed polypropylene material, and the outside of the basic module is wrapped with polyurethane foam and a body cover in sequence from the inside to the outside. The headrest basic module in the present invention is made of EPP, has better impact resistance and buffering ability, is lighter in weight, and has better safety performance.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a headrest for an automobile seat. Background Art

[0002] With the progress of society, the continuous improvement of living standards and the development of automobile technology, cars are becoming more and more popular. As a safety regulation part on cars, car seat headrests play a key role in protecting the neck and head of passengers when cars collide, rear-end collision and other traffic accidents. The headrests currently used on the market use polyurethane foam, high-density polyethylene plastic parts, and metal headrest rods as the main headrest parts and are provided to the main engine manufacturers or complete chair manufacturers as headrest assembly products. This type of headrest is commonly used in AB-level models on the market, but the cost of the headrest is relatively high, and the safety needs to be further improved. Summary of the invention

[0003] The object of the present invention is to provide a car seat headrest to solve at least one of the above technical problems existing in the prior art.

[0004] To solve the above technical problems, the present invention provides a car seat headrest, comprising: a basic module (body) made of foamed polypropylene material (EPP), the outside of the basic module is wrapped with polyurethane foam (or polyurethane foam layer) and a body cover from the inside to the outside.

[0005] The headrest basic module in the present invention is made of EPP, has better impact resistance and buffering capacity, is lighter in weight, and has better safety performance.

[0006] Furthermore, the basic module is arranged on the seat back in an adjustable height via a headrest rod.

[0007] Furthermore, it also includes a wing part, which is arranged on the basic module, and a speaker is arranged on the wing part;

[0008] The wing portion includes a left wing portion and a right wing portion; on a projection plane perpendicular to the front-rear direction of the vehicle body, the left wing portion and the right wing portion are respectively arranged on the left and right sides of the driver or passenger's head.

[0009] In this application, the basic module (or headrest body) is the basic component of the headrest, which contains the headrest up and down adjustment structure; the lower part has a headrest rod for supporting the entire headrest assembly. The speakers are arranged on the left and right sides of the headrest, closer to the left and right ears of the passengers, providing navigation voice or entertainment music for the passengers, thereby achieving a better auditory effect.

[0010] Furthermore, the speaker is connected to the audio playback device via a wiring harness; both ends of the wiring harness are respectively connected to the main harness of the seat and the speaker, for transmitting power and audio signals to the speaker, and the wiring harness is arranged as a whole inside the headrest and is not visible from the outside.

[0011] Alternatively, the speaker is connected to the audio playback device via a wireless transmission module such as Bluetooth, WiFi, etc.

[0012] Furthermore, a left speaker and a right speaker are respectively arranged on the left wing and the right wing.

[0013] Furthermore, the driver or passenger's head rests on the basic module, and in the height direction, the speaker is arranged facing the driver or passenger's ear.

[0014] Furthermore, the wing portion may be pivotally connected to the base module away from or close to the driver's or passenger's head.

[0015] Furthermore, it also includes an intermediate fixing plate, and the left wing part and the right wing part are arranged at the left and right ends of the intermediate fixing plate respectively; the intermediate fixing plate is detachably connected to the basic module.

[0016] Preferably, the intermediate fixing plate is connected to the basic module by means of snap connection, threaded connection, etc. When snap connection is adopted, a hook or slot structure is provided on the intermediate fixing plate, and an external interface or buckle structure adapted to the hook or slot is provided on the basic module.

[0017] The wing parts and the basic module can be standardized and modularized through the intermediate fixing plate. After the snap-on or threaded connection structure is standardized, the headrests of different vehicle models and design styles and the wings of different specifications or styles can be quickly replaced and installed, thereby improving assembly efficiency and reducing production costs.

[0018] Furthermore, the left wing portion and the right wing portion may be pivotally connected to the middle fixing plate away from or close to the driver's or passenger's head, respectively.

[0019] The wing part is directly pivotally connected to the base module in a swingable manner, or the wing part (the left wing part and the right wing part) is swingably arranged on the middle fixed plate, and then arranged on the base module through the middle fixed plate. The left wing part and the right wing part can gradually approach or move away from the driver's or passenger's head during the swinging process. When the left wing part and the right wing part approach the driver's or passenger's head by swinging, the speaker can gradually approach the driver's or passenger's ear, thereby providing the driver or passenger with a clearer sound effect; by adjusting the flip angle of the wing part, the speaker can be made closer to the passenger's or driver's ear, ensuring good comfort and privacy.

[0020] Furthermore, the wing part includes, in the thickness direction, a decorative plate, sound insulation cotton, a bracket and wing foam; an ear piece (i.e., an installation connecting plate) is provided on the bracket;

[0021] The decorative plate is connected to the bracket by means of a snap connection or a threaded connection, and a closed space is formed between the bracket and the decorative plate. The sound insulation cotton is filled in the closed space, thereby being used to block the sound of the speaker from propagating backwards, thereby improving the sound experience effect;

[0022] The loudspeaker is arranged on the bracket ear plate through a fixed bracket; the wing foam covers the front side of the bracket, and the wing foam has a through hole for accommodating the loudspeaker at a position corresponding to the loudspeaker.

[0023] Furthermore, the front side of the middle fixed plate (the side close to the passenger) is coated with wing foam.

[0024] The middle fixing plate and the outside of the wing are wrapped with a wing cover, and the wing cover is perforated at the corresponding position of the speaker to meet the penetration requirements of the speaker sound.

[0025] The decorative plate is fixed on the ear piece of the bracket, which can play the role of decoration, sound insulation and dust prevention. The sound insulation cotton is preferably bonded to one side of the bracket of the decorative plate, so as to facilitate assembly.

[0026] Furthermore, it also includes an execution module for maintaining and changing the swing angle of the wing. The execution module can be a manual, electric, pneumatic or hydraulic drive mechanism and its transmission mechanism. For example, an electric motor and its gear transmission mechanism; a hydraulic, pneumatic or electric telescopic rod, etc.

[0027] By adopting the above technical solution, the present invention has the following beneficial effects:

[0028] The present invention provides a car seat headrest, which integrates a speaker into the seat headrest while ensuring safety performance, while taking into account comfort and privacy, enriching the functions of the car seat headrest, and being able to provide a safer and more comfortable driving experience and a more comfortable riding environment for the driver or passengers.

[0029] By adjusting the wings on both sides of the headrest, the speakers can be brought closer to the passengers' ears, allowing passengers to enjoy their own auditory feast during the ride. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A three-dimensional diagram of a car seat headrest provided in Example 1 of the present invention;

[0032] Figure 2 for Figure 1 AA section view in;

[0033] Figure 3 A three-dimensional diagram of a headrest with wings provided in Example 1 of the present invention;

[0034] Figure 4 for Figure 3 A top view of a car seat headrest is shown;

[0035] Figure 5 This is a schematic diagram of the layout structure of the loudspeaker in Embodiment 1 of the present invention;

[0036] Figure 6 This is a schematic diagram of the state of the wing portion before flipping in Example 1;

[0037] Figure 7 This is a schematic diagram of the state after the wing part is flipped in Example 1;

[0038] Figure 8 It is a schematic diagram of the back of the middle fixing plate in Example 1;

[0039] Fig. 9 This is a schematic diagram of the structure of the basic module in Example 1;

[0040] Fig.10 This is an exploded schematic diagram of the wing portion in Example 1;

[0041] Fig.11 This is a schematic diagram of the structure of the execution module in Embodiment 2 of the present invention;

[0042] Fig.12 This is a working principle diagram of the execution module in Example 2 of the present invention.

[0043] Reference numerals:

[0044] 1-head; 10-base module; 10a-headrest rod; 11-external interface; 12-polyurethane foam; 13-body cover; 20-wing; 21-left wing; 22-right wing; 23-decoration; 24-sound insulation cotton; 25-bracket; 26-wing foam; 27-wing cover; 30-speaker; 40-wiring harness; 50-middle fixing plate; 51-buckle; 100-executing module; 110-cylindrical body; 111 -limiting groove; 112-ratchet tooth structure; 112a-retaining step portion; 112b-transition portion; 120-first push rod; 121-push plate; 122-annular tooth structure; 123-limiting bar; 130-second push rod; 131-guide rib; 132-pointed corner portion; 140-gear rack transmission pair; 141-transmission rack; 142-gear structure; 151-first return spring; 152-second return spring. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The present invention is further explained below in conjunction with specific implementation modes.

[0049] Example 1

[0050] like Figure 1-2As shown, the embodiment provides a car seat headrest, which includes: a basic module 10 made of expanded polypropylene (EPP), the basic module 10 is arranged on the seat back through a headrest rod 10a in an adjustable height. The basic module 10 is wrapped with polyurethane foam 12 and a body cover 13 from the inside to the outside.

[0051] The headrest basic module in the present invention is made of EPP, has better impact resistance and buffering capacity, is lighter in weight, and has better safety performance.

[0052] In the above technical solution, it is more preferred that Figure 3 As shown, it may also include a wing portion 20, which is arranged on the base module 10, and a speaker 30 is arranged on the wing portion 20;

[0053] The wing part 20 is divided into a left wing part 21 and a right wing part 22; a speaker 30 is respectively arranged on the left wing part 21 and the right wing part 22. On a projection plane perpendicular to the front-rear direction of the vehicle body, the left wing part 21 and the right wing part 22 are respectively arranged on the left and right sides of the driver's or passenger's head. In the present application, the front side of the headrest is the side where the passenger or driver sits, and the left and right hands of the passenger or driver correspond to the left and right sides of the headrest respectively.

[0054] In the present application, the basic module 10 (or headrest body) is the basic component of the headrest, which contains the headrest up and down adjustment structure; the lower part has a headrest rod for supporting the entire headrest assembly. The speakers 30 are arranged on the left and right sides of the headrest, closer to the left and right ears of the passenger, providing navigation voice or entertainment music for the passenger, thereby achieving a better auditory effect.

[0055] The speaker 30 is connected to the audio playback device through a wiring harness 40; the two ends of the wiring harness 40 are respectively connected to the seat main wiring harness 40 and the speaker 30, for transmitting power and audio signals to the speaker 30. The wiring harness 40 is arranged as a whole inside the headrest and is not visible from the outside.

[0056] By adjusting the height of the headrest, the driver or passenger's head is made to lean against the basic module 10 of the headrest, and the speaker 30 is arranged facing the driver or passenger's ear in the height direction.

[0057] Preferably, Figure 3-5 As shown, the wing portion 20 is rotatably arranged on the base module 10 via a hinge or a pivot axis. Figure 6 and 7As shown, when the left wing portion 21 and the right wing portion 22 are swung close to the driver's or passenger's head 1, the speaker 30 can gradually approach the driver's or passenger's ears, thereby providing the driver or passenger with a clearer sound effect; thus, by adjusting the flip angle of the wing portion 20, the speaker 30 can be made closer to the passenger's or driver's ears, ensuring good comfort and privacy.

[0058] like Figure 8 As shown, this embodiment further includes an intermediate fixing plate 50, and the left wing portion 21 and the right wing portion 22 are arranged on the left and right sides of the intermediate fixing plate 50 respectively; the intermediate fixing plate 50 is detachably connected to the basic module 10. In this embodiment, the intermediate fixing plate 50 is connected to the basic module 10 via a buckle 51 (or hook) on its back. Figure 7 As shown, the basic module 10 is provided with an external interface 11 adapted to the buckle 51 .

[0059] The wing part 20 and the basic module 10 can be standardized and modularized through the intermediate fixing plate 50. After the snap-on or threaded connection structure is standardized, the headrests of different vehicle models and design styles and the wing parts 20 of different specifications or styles can be quickly replaced and installed, thereby improving assembly efficiency and reducing production costs.

[0060] The left wing 21 and the right wing 22 are pivotally connected to the middle fixing plate 50 so as to be away from or close to the driver's or passenger's head 1. That is, the left wing 21 and the right wing 22 are rotatably arranged on the middle fixing plate 50, and then arranged on the base module 10 through the middle fixing plate 50. The left wing 21 and the right wing 22 can gradually approach or move away from the driver's or passenger's head 1 during the rotatable process.

[0061] like Fig.10 As shown, the wing portion 20 includes, from back to front in the thickness direction: a decorative panel 23, sound insulation cotton 24, a bracket 25 and wing foam 26; the bracket 25 is provided with an ear piece (i.e., an installation connecting plate); the bracket 25 is rotatably connected to the middle fixed plate 50 through a hinge or a pivot shaft.

[0062] The decorative plate 23 is connected to the ear plate of the bracket 25 by snapping or threading, and a closed space is formed between the ear plate of the bracket 25 and the decorative plate 23. The sound insulation cotton 24 is filled in the closed space, which is used to block the sound of the speaker 30 from propagating backwards and improve the sound experience effect; the speaker 30 is set on the ear plate of the bracket 25 through a fixing frame; the wing foam 26 covers the front side of the bracket 25, and the wing foam 26 has a through hole for accommodating the speaker 30 at the corresponding position of the speaker 30. The front side of the middle fixing plate 50 (the side close to the passenger) is also covered with wing foam material. The outside of the middle fixing plate 50 and the wing part 20 is wrapped with a wing cover 27, and the wing cover 27 is perforated at the corresponding position of the speaker 30 to meet the penetration requirement of the sound of the speaker 30.

[0063] The decorative plate 23 is fixed on the ear piece of the bracket 25, which can play the role of decoration, sound insulation and dust prevention. The sound insulation cotton 24 is preferably bonded to one side of the bracket 25 of the decorative plate 23, so as to facilitate assembly.

[0064] The car seat headrest provided by the present invention integrates a speaker 30 into the seat headrest under the premise of ensuring safety performance, takes into account comfort and privacy, enriches the functions of the car seat headrest, and can provide a safer and more comfortable driving experience and a more comfortable riding environment for the driver or passenger. And by adjusting the wing parts 20 on both sides of the headrest, the speaker 30 can be brought closer to the passenger's ears, so that the passenger can also enjoy his own auditory feast during the ride.

[0065] Unlike traditional car speakers, the speakers on the headrest are closer to the human ears and the effect is closer to that of headphones. At the same time, considering the usage scenarios, using headrest speakers is safer than using headphones directly, finding a good balance between driving safety and a good entertainment experience;

[0066] The present invention is also conducive to improving privacy. The sound transmission of traditional car speakers is open. Today, as more and more consumers pay attention to the riding experience, car speakers have great limitations. When the present invention is applied to the whole vehicle, it can form an effect that each position does not interfere with each other and the sound is independent. For example, when the main driver is receiving navigation audio information and passengers in other positions are listening to music, each partition does not interfere with each other, which has good privacy and avoids the discomfort of ears caused by long-term use of headphones.

[0067] Thirdly, the present invention is designed with a small wing structure, and the flip angles of the two wings can be adjusted according to the user's requirements to improve comfort.

[0068] Example 2

[0069] This embodiment is basically the same as Embodiment 1, except that:

[0070] like Fig.11 As shown, the automobile seat headrest disclosed in this embodiment has an execution module 100 for maintaining and changing the swing angle of the wing part.

[0071] The execution module 100 in this embodiment is disposed on the basic module 10 ; or, an installation space is reserved on the basic module 10 , and the execution module 100 is disposed on the intermediate fixing plate 50 .

[0072] The execution module 100 includes: a cylindrical body 110, a first push rod 120, a second push rod 130 and a gear rack transmission pair 140. The cylindrical body 110 is generally arranged along the front and rear direction of the vehicle body, and the top ends of the first push rod 120 and the second push rod 130 are respectively inserted into the cylindrical body 110 from the front and rear ends, and the first push rod 120 and the second push rod 130 can slide along the middle through hole of the cylindrical body 110.

[0073] The gear rack transmission pair 140 includes a transmission rack 141 and a gear structure 142 that mesh with each other; the transmission rack 141 is fixedly connected to the end of the second push rod 130 through an intermediate connecting member and moves synchronously with the second push rod 130. The gear structure 142 is coaxially arranged with the pivot axis of the wing part 20 and is relatively fixedly connected to the wing part 20. When the second push rod 130 moves in the front-back direction, the wing part 20 is driven to swing through the transmission rack 141 and the gear structure 142.

[0074] The execution module 100 further includes a first return spring 151 and a second return spring 152. The first return spring 151 is disposed between the first push rod 120 and the cylindrical body 110. When the first return spring 151 is in operation, it tends to force the first push rod 120 to move forward.

[0075] One end of the second return spring 152 is connected to the cylindrical body 110, the base module 10 or the intermediate fixing plate 50, and the other end is connected to the second push rod 130, and tends to force the second push rod 130 to move forward during operation. When the second push rod 130 moves forward, it drives the wing part 20 to swing backward, away from the head of the passenger or the driver, and returns to the initial state.

[0076] By pressing the end of the first push rod 120, the first push rod 120 pushes the second push rod 130 to overcome the spring force of the first return spring 151 and the second return spring 152 and move backward, and drives the wing part 20 to swing forward through the gear rack transmission pair 140, approaching the head of the passenger or driver, and finally close to the ear.

[0077] A push plate 121 is provided at the end of the first push rod 120 , and the outside of the push plate 121 is wrapped with wing foam, wing cover, etc., so that passengers or drivers can use their heads to push against the push plate 121 to achieve the swinging of the wing part 20 .

[0078] like Fig.12 As shown, in order to achieve that the wing portion 20 remains in the initial state before swinging, or in the working state after swinging, a limiting groove 111 is provided on the inner side wall of the middle through hole of the cylindrical body 110, and a ratchet tooth structure 112 is provided on the inner side wall of the middle through hole at one end behind the limiting groove 111, and the ratchet tooth structure 112 includes: a retaining step portion 112a and a transition portion 112b.

[0079] A guide rib 131 is provided on the outer circle of the top end of the second push rod 130 to guide and cooperate with the limiting groove 111. The cooperation between the guide rib 131 and the limiting groove 111 can limit the circumferential rotation of the second push rod 130 along the cylindrical body 110. The guide rib 131 is provided with a sharp corner portion 132 that cooperates with the ratchet tooth structure 112 at the front end close to the first push rod 120.

[0080] The outer circumferential side surface of the front end of the first push rod 120 is provided with a limiting block 123 which cooperates with the limiting groove 111 to prevent the first push rod 120 from rotating. The end surface of the front end of the first push rod 120 is provided with an annular tooth structure 122 which cooperates with the sharp corner portion 132. Push the first push rod 120 backward and the first push rod 120 moves backward. The annular tooth structure 122 at the front end of the first push rod 120 pushes the sharp corner portion 132 to force the second push rod 130 to slide backward. When the guide ribs 131 all slide out of the limiting groove 111, the sharp corner portion 132 slides along the tooth surface of the annular tooth structure 122 under the action of the second return spring 152. The tooth surface of the annular tooth structure 122 guides the sharp corner portion 132 to rotate and slide onto the retaining step portion 112a of the ratchet tooth structure 112; stop pressing the first push rod 120, the first push rod 120 moves forward and resets under the action of the first return spring 151, and the limiting groove on the retaining step portion 112a prevents the sharp corner portion 132 from continuing to slide, thereby forcing the wing portion 20 to maintain the working state after swinging.

[0081] When the first push rod 120 is pressed hard again, the tooth surface of the annular tooth structure 122 of the first push rod 120 guides the pointed corner portion 132 to slide again, and the pointed corner portion 132 slides out of the retaining step portion 112a of the ratchet tooth structure 112, and slides into the limiting groove 111 along the transition portion 112b of the ratchet tooth structure 112; stop pressing the first push rod 120, the first push rod 120 moves forward and resets under the action of the first reset spring 151, and the second push rod 120 moves forward and resets under the action of the second reset spring 152, and drives the wing portion 20 to swing backward and return to its initial state through the gear rack transmission pair 140.

[0082] A limiting structure such as a limiting step or a limiting groove is provided between the first push rod 120 and the cylindrical body 110 to prevent the first push rod 120 from popping forward under the action of the spring force.

[0083] The execution module 100 in this embodiment does not require an additional power source, nor does it require passengers to manually swing the wings. The swing angle of the wing 20 can be changed by simply pushing the push plate 121 backward with the head. This is simple and convenient, especially avoiding the driver being distracted by manual operation of the wings during driving, which may cause traffic accidents. It is therefore safer and more reliable.

[0084] The push plate 121 is wrapped by the wing foam and the wing cover and is not visible from the outside. After being pressed, the push plate 121 can automatically return to its original state under the action of the spring force, thereby not affecting the overall appearance of the headrest.

[0085] In case of a sudden safety accident, the passenger or the driver can also press the push plate 121 with the head to force the wing part 20 to swing and protect both sides of the head to prevent foreign objects from injuring the head.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A car seat headrest, characterized in that: include: A basic module made of foamed polypropylene material, the outside of the basic module is wrapped with polyurethane foam and a main body cover from the inside to the outside; It also includes a wing part, which is arranged on the base module and has a speaker arranged on the wing part; The wing portion includes a left wing portion and a right wing portion; on a projection plane perpendicular to the front-rear direction of the vehicle body, the left wing portion and the right wing portion are respectively arranged on the left and right sides of the driver or passenger's head; Also included is an execution module for maintaining and changing the swing angle of the wing portion; The execution module includes: a cylindrical body, a first push rod, a second push rod and a gear rack transmission pair; the cylindrical body is arranged along the front and rear direction of the vehicle body, the top ends of the first push rod and the second push rod are respectively inserted into the cylindrical body from the front and rear ends, and the first push rod and the second push rod can slide along the middle through hole of the cylindrical body; The gear rack transmission pair includes a transmission rack and a gear structure that mesh with each other; the transmission rack is fixedly connected to the end of the second push rod through an intermediate connecting member and moves synchronously with the second push rod; the gear structure is coaxially arranged with the pivot axis of the wing part and is relatively fixedly connected to the wing part; when the second push rod moves in the front-back direction, the wing part is driven to swing through the transmission rack and the gear structure; The execution module further includes a first return spring and a second return spring, wherein the first return spring is arranged between the first push rod and the cylindrical body, and the first return spring tends to force the first push rod to move forward when working; One end of the second return spring is connected to the cylindrical body, the basic module or the intermediate fixed plate, and the other end is connected to the second push rod, and tends to force the second push rod to move forward during operation; when the second push rod moves forward, it drives the wing part to swing backward, away from the head of the passenger or the driver, and returns to the initial state; By pressing the end of the first push rod, the first push rod pushes the second push rod to overcome the spring force of the first return spring and the second return spring to move backward, and the wing part is driven to swing forward through the gear rack transmission pair, close to the head of the passenger or the driver, and finally close to the ear; A limiting groove is arranged on the inner side wall of the middle through hole of the cylindrical body, and a ratchet tooth structure is arranged on the inner side wall of the middle through hole at one end behind the limiting groove, and the ratchet tooth structure includes: a retaining step portion and a transition portion; A guide rib is provided on the outer circle of the top end of the second push rod to cooperate with the limiting groove, and the cooperation between the guide rib and the limiting groove can limit the circumferential rotation of the second push rod along the cylindrical body; the guide rib is provided with a sharp corner portion cooperating with the ratchet tooth structure at the front end close to the first push rod; The outer circular side surface of the front end of the first push rod is provided with a limiting bar block which cooperates with the limiting groove guide to prevent the first push rod from rotating; an annular tooth structure which cooperates with the sharp corner part is provided on the end face of the front end of the first push rod; the first push rod is pushed backward, and the first push rod moves backward, and the annular tooth structure at the front end of the first push rod pushes the sharp corner part to force the second push rod to slide backward. When all the guide ribs slide out of the limiting groove, the sharp corner part slides along the tooth surface of the annular tooth structure under the action of the second return spring, and the tooth surface of the annular tooth structure guides the sharp corner part to rotate and slide into the retaining step part of the ratchet tooth structure; stop pressing the first push rod, and the first push rod moves forward and resets under the action of the first return spring, and the limiting groove on the retaining step part prevents the sharp corner part from continuing to slide, thereby forcing the wing part to maintain the working state after swinging; When the first push rod is pressed hard again, the tooth surface of the annular tooth structure of the first push rod guides the sharp corner part to slide again, and the sharp corner part slides out of the retaining step part of the ratchet tooth structure and slides into the limiting groove along the transition part of the ratchet tooth structure; stop pressing the first push rod, the first push rod moves forward and resets under the action of the first reset spring, and the second push rod moves forward and resets under the action of the second reset spring, and drives the wing part to swing backward through the gear rack transmission pair to return to the initial state.

2. The automobile seat headrest according to claim 1, characterized in that: The basic module is arranged on the seat back in a height-adjustable manner via a headrest rod.

3. The automobile seat headrest according to claim 1, characterized in that: The speaker is connected to the audio playback device via a wiring harness; Alternatively, the speaker is connected to the audio playback device via a wireless transmission module.

4. The automobile seat headrest according to claim 1, characterized in that: A left loudspeaker and a right loudspeaker are respectively arranged on the left wing part and the right wing part.

5. The automobile seat headrest according to claim 1, characterized in that: The driver or passenger's head rests on the basic module, and in the height direction, the loudspeaker is arranged facing the driver or passenger's ear.

6. The automobile seat headrest according to claim 1, characterized in that: The wing portions may be pivotally connected to the base module away from or closer to the driver's or passenger's head.

7. The automobile seat headrest according to claim 1, characterized in that: It also includes an intermediate fixing plate, and the left wing part and the right wing part are arranged at the left and right ends of the intermediate fixing plate respectively; the intermediate fixing plate is detachably connected to the basic module.

8. The automobile seat headrest according to claim 7, characterized in that: The intermediate fixing plate is connected to the basic module by means of clamping or threading.

9. The automobile seat headrest according to claim 7, characterized in that: The left wing portion and the right wing portion can be pivotally connected to the middle fixing plate away from or close to the driver's or passenger's head, respectively.

Images