Headrest folding device of vehicle seat

Abstract

The utility model discloses a headrest folding device of a vehicle seat, and belongs to the technical field of vehicle accessories. Comprising a backrest framework assembly; the base frame is fixed on the backrest framework assembly and is provided with a base frame main panel and two base frame side plates; the headrest rod assembly is rotationally connected to the base frame and provided with a pair of headrest rod bodies, a rotating shaft and a pair of clamping positioning plates, and the rotating shaft is connected between the two base frame side plates of the base frame in a pivoted mode; the driving elastic piece is used for driving the headrest rod assembly to rotate; the locking assembly is used for achieving locking of the headrest rod assembly, and the locking assembly is in locking fit with the clamping positioning plate; the unlocking inhaul cable assembly is used for driving the locking assembly to move; the unlocking reset elastic piece is used for applying elastic force to the locking assembly to achieve locking of the locking assembly and the headrest rod assembly; the folding seat headrest has the advantages that folding operation of the seat headrest is effectively achieved, and the neck of a passenger is protected; the structure is compact, the strength is high, gaps among parts are small, the adjusting process is smooth, and the working stability is good; locking is reliable, and unlocking force is small.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle accessories, and in particular relates to a headrest folding device for a vehicle seat. Background Art

[0002] With the improvement of people's living standards and the continuous progress of science and technology, the development of the automobile industry has been rapid, and people's requirements for various riding performance, riding comfort and interior space of vehicles have been increasing. As one of the important components of automobiles, excellent vehicle seat design can also enhance the competitiveness of automobiles. Vehicle seat headrests can provide head support and safety protection for drivers and passengers. Headrests are equipped on the front and rear seats of the car. As consumers' requirements for riding comfort and operating experience become more diverse, the foldable headrests set on the top of the vehicle seat can achieve diversified and flexible use scenarios of the interior space because they can be turned over. Specifically, if the backrest is folded down and the headrest is folded when there is no one in the back row, more space can be left in the car for passengers to rest or load items. If the headrest is folded in the front seat, a larger field of vision can be provided for the rear passengers. Therefore, this type of foldable headrest has the advantages of high convenience and high space utilization, and has been widely used in various types of cars. However, the existing vehicle seat headrest folding mechanism generally has the problems of complex overall structure, large number of components, and takes up a lot of space. It is also very inconvenient to assemble and the locking reliability is also poor. In addition, the existing headrest folding mechanism is very cumbersome to operate when unlocking and folding, and often requires a lot of force to adjust and fold. During the adjustment process of the headrest, there are also problems of fast rotation speed and accidental flipping after locking, resulting in poor comfort and uneven adjustment. In severe cases, it may even cause injury to the occupants, and safety cannot be guaranteed. In addition, the existing pillow folding mechanism has poor overall strength and there are often gaps between the components, which causes shaking and swaying during the folding process, accompanied by abnormal sounds and noises, thereby failing to ensure smooth operation and resulting in a poor user experience.

[0003] In view of the above situation, it is necessary to design a headrest folding mechanism with high strength, reliable locking, efficient and convenient rotation and flipping, and good safety. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0004] The task of the utility model is to provide a headrest folding device for a vehicle seat which is compact in structure, easy to assemble, high in strength and with a small combination gap, which helps to achieve efficient and reliable rotation and folding action through optimized structure, thereby effectively protecting the passenger's neck, and achieves the advantages of small unlocking force, comfortable and reliable use, and smooth adjustment process, and is conducive to ensuring the reliability of locking by setting an unlocking and resetting elastic part and can effectively prevent the headrest from accidentally flipping over, thereby ensuring the safety and reliability of use.

[0005] The task of the utility model is accomplished in this way. A headrest folding device for a vehicle seat comprises: a backrest frame assembly; a base frame, which is fixedly mounted on the backrest frame assembly, and the base frame has a base frame main panel and base frame side panels formed on both sides of the base frame main panel; a headrest rod assembly, the headrest rod assembly is rotatably connected to the base frame, and the headrest rod assembly has a pair of headrest rod bodies, a rotating shaft connected to the two headrest rod bodies, and a pair of engaging positioning plates, the two headrest rod bodies are extended in the vertical direction and are used to connect the headrests, the rotating shaft is pivotally connected between the two base frame side panels of the base frame, and the two engaging positioning plates They are respectively installed at the two end portions of the rotating shaft in the length direction; a driving elastic member, the driving elastic member is sleeved on the rotating shaft, and the driving elastic member is used to drive the headrest rod assembly to rotate; a locking assembly, the locking assembly is used to achieve the locking of the headrest rod assembly so as to limit the movement of the headrest rod assembly relative to the base frame, and the locking assembly can be engaged and locked with one of the engaging positioning plates of the headrest rod assembly; an unlocking cable assembly, the unlocking cable assembly is installed on the locking assembly and is used to drive the movement of the locking assembly; an unlocking reset elastic member, the unlocking reset elastic member is used to apply an elastic force to the locking assembly to achieve locking with the headrest rod assembly.

[0006] In a specific embodiment of the utility model, the locking assembly includes a locking plate, an unlocking shaft and a connecting shaft; wherein the locking plate is positioned at a lower position of one of the locking positioning plates of the headrest rod assembly, and the upper part of the locking plate can be assembled and locked with the lower part of the locking positioning plate, and one axial end of the connecting shaft is positioned and installed on a base frame side plate of the base frame, and the connecting shaft also passes through the base frame side plate and extends toward the other base frame side plate of the base frame. The length direction of the locking plate is kept vertical to the axial direction of the connecting shaft, and the rear part of the locking plate body is sleeved on the connecting shaft and rotatably connected thereto, the unlocking shaft is installed at a lower position of the locking plate body away from the front end of the connecting shaft, and the unlocking shaft passes out of the plate body of the locking plate outwardly, and the unlocking cable assembly can be fixedly connected with the unlocking shaft and drive the unlocking shaft to move.

[0007] In a specific embodiment of the present invention, a locking plate engaging portion is convexly formed at the front upper end position of the locking plate of the locking assembly, and an open-mouthed engaging positioning plate matching groove is correspondingly provided on the lower part of the engaging positioning plate; the locking plate and the engaging positioning plate have a locked state and an unlocked state, and in the locked state, the locking plate engaging portion can be fitted and mounted in the engaging positioning plate matching groove to achieve the locking of the locking plate and the engaging positioning plate, and in the unlocked state, the locking plate engaging portion can slide in the engaging positioning plate matching groove and slide out of the engaging positioning plate matching groove, thereby achieving the separation of the locking plate and the engaging positioning plate to achieve unlocking.

[0008] In another specific embodiment of the present invention, the connecting shaft of the locking assembly includes a connecting shaft installation section, a connecting shaft pivot section and a connecting shaft circular shaft body; wherein the connecting shaft installation section passes through the base side plate of the base and is fixed with the base side plate to realize the positioning installation of the connecting shaft and the base; the connecting shaft pivot section is formed at one side position of the connecting shaft installation section, and a locking plate pivot hole that runs through the thickness direction is provided on the rear part of the locking plate of the locking assembly, the connecting shaft pivot section is installed in the locking plate pivot hole to realize rotational cooperation with it, and a locking plate pivot hole bushing is also provided in the locking plate pivot hole, which is mounted on the connecting shaft pivot section, and the connecting shaft circular shaft body is formed at one side position of the connecting shaft pivot section away from the connecting shaft installation section, and the unlocking and resetting elastic member is provided on the connecting shaft circular shaft body.

[0009] In another specific embodiment of the present invention, the unlocking shaft of the locking assembly includes an unlocking shaft mating section, an unlocking shaft circular shaft body and an unlocking shaft mating head; the unlocking shaft mating section is penetrated at the lower position of the front end of the locking plate and is mated and fixed with the locking plate, and the unlocking shaft circular shaft body is formed at a side position of the unlocking shaft mating section, the unlocking reset elastic member can apply a force to the connecting shaft circular shaft body, and the unlocking shaft mating head is formed at one end of the unlocking shaft circular shaft body axially away from the unlocking shaft mating section, and the unlocking shaft mating head can be fixedly connected with the unlocking cable assembly.

[0010] In another specific embodiment of the utility model, the unlocking cable assembly includes a cable body, a cable positioning block and a cable connector; wherein a base main panel bottom positioning seat is formed at the bottom of the base main panel of the base frame, the cable positioning block is fixedly mounted on the base main panel bottom positioning seat, the cable body passes through the cable positioning block, and the cable positioning block can realize the positioning of the cable body; and the cable connector is fixedly mounted on the top end of the cable body, and a zipper connector mating hole is also provided on the cable connector, and the unlocking shaft mating head on the unlocking shaft is embedded in the zipper connector mating hole, so that the unlocking shaft and the cable connector are fixedly connected together.

[0011] In a further specific embodiment of the present invention, a rotation axis positioning section is formed at both end portions of the rotation axis of the headrest rod assembly in the length direction, and a corresponding locking positioning plate connecting hole is provided on the locking positioning plate. The shape and size of the locking positioning plate connecting hole are adapted to the shape and size of the rotation axis positioning section, and the rotation axis positioning sections at both end portions of the rotation axis can be fitted in their respective corresponding locking positioning plate connecting holes, thereby realizing the positioning connection between the rotation axis and the two locking positioning plates; and a base frame side plate connecting hole is provided on the two base frame side plates of the base frame and at the position corresponding to the rotation axis, and a fixed base frame side plate connecting hole is provided in the base frame side plate connecting hole. A base frame side plate pivot pin is fixedly provided, and a base frame side plate connecting hole bushing is provided in the base frame side plate connecting hole, and the base frame side plate connecting hole bushing is sleeved on the base frame side plate pivot pin; the base frame side plate pivot pin is extended toward the rotation axis, and a base frame side plate pivot pin mating section is also formed on the base frame side plate pivot pin, and a rotation axis connecting hole is also provided on the rotation axis positioning section of the rotation axis, the shape and size of the rotation axis connecting hole are adapted to the shape and size of the base frame side plate pivot pin mating section, and the base frame side plate pivot pin mating section can be inserted into the rotation axis connecting hole and realize rotational mating with it, thereby realizing the rotational connection between the rotation axis and the base frame.

[0012] In a more specific embodiment of the present invention, the driving elastic member is a torsion spring, and the driving elastic member includes a driving elastic member fixed spring foot end and a driving elastic member driving spring foot end; the driving elastic member is integrally coiled on the rotating shaft, and a driving elastic member positioning hole that runs through the thickness direction of the base is opened on the main panel of the base frame, the driving elastic member fixed spring foot end is inserted into the driving elastic member positioning hole, and a rotating shaft power rod is also provided on the rotating shaft, and the driving spring foot end of the driving elastic member abuts against the rotating shaft power rod and applies a rotational torque to it.

[0013] In another specific implementation of the present invention, the unlocking and resetting elastic member is a torsion spring, and the unlocking and resetting elastic member includes an unlocking and resetting elastic member fixing spring foot end and an unlocking and resetting elastic member connecting spring foot end; wherein, the unlocking and resetting elastic member is integrally coiled on the circular shaft body of the connecting shaft member, and an unlocking and resetting elastic member positioning hole that runs through the thickness direction of the base frame is opened on the base main panel of the base frame, the unlocking and resetting elastic member fixing spring foot end is inserted into the unlocking and resetting elastic member positioning hole, and the unlocking and resetting elastic member connecting spring foot end extends toward the unlocking shaft member, and the unlocking and resetting elastic member connecting spring foot end is hooked on the circular shaft body of the unlocking shaft member and applies elastic force to it.

[0014] In yet another specific embodiment of the present invention, the backrest frame assembly includes a backrest frame connecting beam and a backrest frame mounting plate fixedly mounted on the backrest frame connecting beam; the backrest frame mounting plate is positioned on a base main panel of the base frame, and the base main panel is fixedly connected to the backrest frame mounting plate by a plurality of base main panel fixing bolts, so that the base frame and the backrest frame assembly are fixed together; and a base side panel ear seat is formed at a front position of the base side panel away from the base main panel, and a snap-fit ​​positioning plate limiting buffer pad is installed on the inner side surface of the base side panel ear seat facing the base main panel, and the snap-fit ​​positioning plate limiting buffer pad is used to limit the travel range of the snap-fit ​​positioning plate and provide buffering protection for it.

[0015] The beneficial effects of the present invention are as follows: firstly, when the headrest flipping device in the present technical solution is in use, the locking assembly and the headrest rod assembly can be unlocked by operating the unlocking cable assembly, and the driving elastic member can apply a force to the rotating shaft during the initial unlocking to reliably drive the headrest rod assembly to rotate, thereby realizing the rotation and folding of the headrest body, which can effectively protect the passenger's neck, and the operation process has a small unlocking force, a smooth adjustment process, and is convenient and comfortable to use, and can achieve clear gear control, while reducing impact loads, thereby preventing the headrest rod assembly from rotating too fast and injuring the passenger; in addition, by providing an unlocking and resetting elastic member that applies elastic force to the locking assembly, This ensures that the locking assembly has a movement tendency to achieve locking with the headrest rod assembly. On the one hand, it can effectively and reliably lock the locking assembly and the headrest rod assembly after unlocking. On the other hand, it can also keep the locking assembly and the headrest rod assembly in a locked state without applying external force, which can prevent the locking assembly from being accidentally unlocked and causing the headrest to accidentally flip over, thereby ensuring safe and reliable use. In addition, the headrest folding device has a compact structure, occupies a small space, can be installed on the seat back and is easy to assemble. At the same time, the components are firmly combined and have high impact resistance. At the same time, the use gap is small, which ensures stability and reliability during locking and can improve the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the invention;

[0017] Figure 2 for Figure 1 An exploded view of the illustrated embodiment;

[0018] Figure 3 for Figure 1 A schematic diagram of the structural decomposition of the locking assembly, the unlocking cable assembly and the unlocking and resetting elastic member in the illustrated embodiment.

[0019] In the figure: 1. backrest frame assembly, 11. backrest frame connecting beam, 12. backrest frame mounting plate; 2. base frame, 21. base frame main panel, 211. base frame main panel bottom positioning seat, 212. drive elastic member positioning hole, 213. unlock reset elastic member positioning hole, 214. base frame main panel fixing bolt, 22. base frame side plate, 221. base frame side plate connecting hole, 2211. base frame side plate connecting hole bushing, 222. base frame side plate pivot pin, 2221. base frame side plate pivot pin matching section, 223. base frame side plate ear seat, 224. engaging positioning plate limiting buffer pad; 3. headrest rod assembly, 31. headrest rod body, 32. rotating shaft, 321. rotating shaft positioning section, 322. rotating shaft connecting hole, 323. rotating shaft power rod, 33. engaging positioning plate, 331. engaging positioning plate matching groove, 332. Engagement positioning plate connecting hole; 4. Driving elastic member, 41 driving elastic member fixing spring foot end, 42. Driving elastic member driving spring foot end; 5. Locking assembly, 51. Locking plate, 511. Locking plate engaging portion, 512. Locking plate pivot hole, 5121. Locking plate pivot hole bushing, 52. Unlocking shaft, 521. Unlocking shaft matching section, 522. Unlocking shaft round shaft body, 523. Unlocking shaft fitting head, 53. Connecting shaft, 531. Connecting shaft installation section, 532. Connecting shaft pivot section, 533. Connecting shaft round shaft body; 6. Unlocking cable assembly, 61. Cable body, 62. Cable positioning block, 63. Cable connector, 631. Cable connector fitting hole; 7. Unlocking reset elastic member, 71. Unlocking reset elastic member fixing spring foot end, 72. Unlocking reset elastic member connecting spring foot end. DETAILED DESCRIPTION

[0020] The following will be described in detail in the form of embodiments, but the description of the embodiments is not a limitation of the scheme of the utility model. Any equivalent changes made based on the concept of the utility model that are merely formal but not substantial should be regarded as within the scope of the technical scheme of the utility model.

[0021] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are for the current Figure 1It refers to the position state, and therefore cannot be understood as a special limitation of the technical solution provided by the utility model.

[0022] See also Figure 1 and Figure 2 , shows a headrest folding device for a vehicle seat, comprising: a backrest frame assembly 1, which is arranged in the vehicle seat backrest; a base frame 2, which is fixedly installed on the aforementioned backrest frame assembly 1, and the base frame 2 has a base frame main panel 21 and base frame side panels 22 formed at both ends of the length direction of the base frame main panel 21, and the aforementioned base frame 2 is an integrated structure, which can greatly improve the structural strength and stability of the base frame; a headrest rod assembly 3, the aforementioned headrest rod assembly 3 is rotatably connected to the aforementioned base frame 2, and the headrest rod assembly 3 has a pair of headrest rod bodies 31, a headrest rod body 31 connected to the two A rotating shaft 32 on a headrest rod body 31 and a pair of engaging positioning plates 33, the two aforementioned headrest rod bodies 31 are extended in the vertical direction and are used to connect the headrest bodies, the aforementioned headrest rod bodies 31 can be assembled and connected with the rotating shaft 32, the aforementioned rotating shaft 32 is pivotally connected between the two base frame side plates 22 of the base frame 2, and the two engaging positioning plates 33 are respectively installed at the two end portions of the rotating shaft 32 in the length direction; a driving elastic member 4, the aforementioned driving elastic member 4 is sleeved on the aforementioned rotating shaft 32, and the driving elastic member 4 is used to drive the aforementioned headrest rod assembly 3 to rotate; a locking assembly 5, the aforementioned locking assembly 5 is used to lock the headrest rod assembly 3 so as to limit the movement of the headrest rod assembly 3 relative to the base frame 2, and the locking assembly 5 can be locked with one of the locking positioning plates 33 of the headrest rod assembly 3; an unlocking cable assembly 6, which is installed on the locking assembly 5 and is used to drive the movement of the locking assembly 5. When the locking assembly 5 and the headrest rod assembly 3 are locked in the locking position, the movement of the unlocking cable assembly 6 can drive the locking assembly 5 to rotate, so that the locking assembly 5 and the headrest rod assembly 3 are unlocked, so that the headrest rod assembly 3 is rotated and folded; an unlocking reset elastic member 7. The unlocking and restoring elastic member 7 is used to apply elastic force to the locking assembly 5 so as to achieve locking with the headrest rod assembly 3. When the locking assembly 5 and the headrest rod assembly 3 are unlocked, and the unlocking cable assembly 6 is released so that it no longer applies force to the locking assembly 5, the unlocking and restoring elastic member 7 can drive the locking assembly 5 to move so that it is locked with the headrest rod assembly 3 again, thereby returning to the locked state, and can keep the locking assembly 5 and the headrest rod assembly 3 in the locked state without applying external force, thereby preventing the locking assembly 3 from being accidentally unlocked and causing the headrest to accidentally flip over, thereby ensuring the safety and reliability of use.

[0023] Please continue to see Figure 1 and Figure 2 And focus on combining Figure 3The locking assembly 5 includes a locking plate 51, an unlocking shaft 52 and a connecting shaft 53; wherein the locking plate 51 is positioned below one of the engaging positioning plates 33 of the headrest rod assembly 3, and the upper part of the locking plate 51 can be assembled and locked with the lower part of the engaging positioning plate 33, and one axial end of the connecting shaft 53 is positioned and installed on a base frame side plate 22 of the base frame 2, and the connecting shaft 53 also passes through the base frame side plate 22 and extends toward the other base frame side plate 22 of the base frame 2, and the length direction of the locking plate 51 is aligned with the axial direction of the connecting shaft 53. The locking plate 51 is kept in a vertical state, and the rear part of the locking plate 51 is mounted on the connecting shaft 53 and is rotationally connected thereto; the unlocking shaft 52 is installed at a lower position of the locking plate 51 away from the front end of the connecting shaft 53, and the unlocking shaft 52 passes out of the locking plate 51, and the unlocking cable assembly 6 can be fixedly connected with the unlocking shaft 52 and drive the unlocking shaft 52 to move. When the unlocking cable assembly 6 is pulled to drive the unlocking shaft 52 to move, the unlocking shaft 52 can drive the locking plate 51 to move, thereby realizing the unlocking of the locking plate 51 and the engaging positioning plate 33.

[0024] Furthermore, a locking plate engaging portion 511 is convexly formed at the front upper end of the locking plate 51 of the aforementioned locking assembly 5, and an open-mouthed engaging positioning plate matching groove 331 is correspondingly provided at the lower portion of the aforementioned engaging positioning plate 33. In this embodiment, the locking plate engaging portion 511 is in a wedge-shaped block shape, and the wedge-shaped block shape facilitates the engagement of the locking plate engaging portion 511 with the engaging positioning plate matching groove 331 and the movement and separation of the two. The aforementioned locking plate 51 There is a locked state and an unlocked state between the locking plate 33. In the locked state, the aforementioned locking plate locking portion 511 can be fitted in the locking plate matching groove 331 to achieve the locking of the locking plate 51 and the locking plate 33. In the unlocked state, the locking plate locking portion 511 can slide in the locking plate matching groove 331 and slide out of the locking plate matching groove 331 to achieve the separation of the aforementioned locking plate 51 and the locking plate 33 to achieve unlocking.

[0025] Furthermore, the connecting shaft 53 of the aforementioned locking assembly 5 includes a connecting shaft installation section 531, a connecting shaft pivot section 532 and a connecting shaft round shaft body 533; wherein the aforementioned connecting shaft installation section 531 passes through the base frame side plate 22 of the aforementioned base frame 2 and is matched and fixed with the base frame side plate 22, thereby realizing the positioning installation of the connecting shaft 53 and the base frame 2, and the connecting shaft installation section 531 can be fixed with the base frame side plate 22 by riveting or welding; the aforementioned connecting shaft pivot section 532 is formed at a side position of the aforementioned connecting shaft installation section 531, and is opened at the rear part of the locking plate 51 of the aforementioned locking assembly 5 A locking plate pivot hole 512 is provided which runs through the thickness direction thereof, and the aforementioned connecting shaft pivot section 532 is cooperatedly installed in the locking plate pivot hole 512 to realize rotational cooperation therewith, and a locking plate pivot hole bushing 5121 which is sleeved on the aforementioned connecting shaft pivot section 532 is also provided in the locking plate pivot hole 512, and the locking plate pivot hole bushing 5121 can ensure the stability of the operation of the aforementioned connecting shaft pivot section 532; the aforementioned connecting shaft circular shaft body 533 is constructed at a side position of the aforementioned connecting shaft pivot section 532 away from the connecting shaft mounting section 531, and the aforementioned unlocking and resetting elastic member 7 is provided on the connecting shaft circular shaft body 533.

[0026] In this embodiment, the unlocking shaft 52 of the aforementioned locking assembly 5 includes an unlocking shaft mating section 521, an unlocking shaft circular shaft body 522 and an unlocking shaft mating head 523; the aforementioned unlocking shaft mating section 521 is penetrated at the lower position of the front end of the aforementioned locking plate 51 and is mated and fixed with the locking plate 51, and the aforementioned unlocking shaft mating section 521 is also fixed to the locking plate 51 body by riveting or welding; and the aforementioned unlocking shaft circular shaft body 522 is formed at a side position of the aforementioned unlocking shaft mating section 521, the aforementioned unlocking reset elastic member 7 can apply a force to the connecting shaft circular shaft body 533, and the aforementioned unlocking shaft mating head 523 is formed at an end portion of the aforementioned unlocking shaft circular shaft body 522 axially away from the aforementioned unlocking shaft mating section 521, and the unlocking shaft mating head 523 can be fixedly connected with the aforementioned unlocking cable assembly 6.

[0027] Please refer to Figure 2 and Figure 3The unlocking cable assembly 6 includes a cable body 61, a cable positioning block 62 and a cable connector 63; wherein, a base main panel bottom positioning seat 211 is formed at the bottom of the base main panel 21 of the base frame 2, the cable positioning block 62 is fixedly mounted on the base main panel bottom positioning seat 211, the cable body 61 passes through the cable positioning block 62, and the cable positioning block 62 can realize the positioning of the cable body 61; and the cable connector 63 is fixedly mounted on the top end of the cable body 61, and a zipper connector fitting hole 631 is also provided on the cable connector 63, and the unlocking shaft fitting head 523 on the unlocking shaft 52 is embedded in the zipper connector fitting hole 631, so that the unlocking shaft 52 and the cable connector 63 are fixedly connected together, and the cable body 61 can be pulled to drive the cable connector 63 to move, so that the cable connector 63 further drives the unlocking shaft 52 to move.

[0028] Furthermore, a rotation axis positioning section 321 is formed at both ends of the rotation axis 32 of the headrest rod assembly 3 in the length direction, and a corresponding engagement positioning plate connecting hole 332 is opened on the aforementioned engaging positioning plate 33. The shape and size of the aforementioned engaging positioning plate connecting hole 332 are adapted to the shape and size of the aforementioned rotation axis positioning section 321, and the rotation axis positioning sections 321 at both ends of the aforementioned rotation axis 32 can be cooperated and installed in their respective corresponding engagement positioning plate connecting holes 332, thereby realizing the positioning connection between the aforementioned rotation axis 32 and the two engaging positioning plates 33; and a base frame side plate connecting hole 221 is opened on the two base frame side plates 22 of the aforementioned base frame 2 and at the position corresponding to the aforementioned rotation axis 32, and a base frame side plate pivot pin 2 is fixedly arranged in the base frame side plate connecting hole 221 22, and a base frame side plate connecting hole bushing 2211 is arranged in the base frame side plate connecting hole 221, and the base frame side plate connecting hole bushing 2211 is sleeved on the base frame side plate pivot pin 222; the aforementioned base frame side plate pivot pin 222 is extended toward the aforementioned rotation axis 32, and a base frame side plate pivot pin matching section 2221 is also formed on the base frame side plate pivot pin 222, and a rotation axis connecting hole 322 is also provided on the rotation axis positioning section 321 of the aforementioned rotation axis 32, the shape and size of the aforementioned rotation axis connecting hole 322 are adapted to the shape and size of the aforementioned base frame side plate pivot pin matching section 2221, and the base frame side plate pivot pin matching section 2221 can be inserted into the rotation axis connecting hole 322 and realize rotation matching therewith, thereby realizing the rotation connection between the aforementioned rotation axis 32 and the base frame 2.

[0029] Furthermore, the aforementioned driving elastic member 4 is a torsion spring, and the driving elastic member 4 includes a driving elastic member fixing spring foot end 41 and a driving elastic member driving spring foot end 42; the aforementioned driving elastic member 4 is integrally coiled on the aforementioned rotating shaft 32, and a driving elastic member positioning hole 212 that runs through the thickness direction of the aforementioned base main panel 21 of the aforementioned base frame 2 is opened, the aforementioned driving elastic member fixing spring foot end 41 is passed through the driving elastic member positioning hole 212, and a rotating shaft power rod 323 is also provided on the aforementioned rotating shaft 32, the aforementioned driving elastic member driving spring foot end 42 abuts against the rotating shaft power rod 323 and applies a rotational torque to it, when the locking plate 51 and the engaging positioning plate 33 are unlocked, the driving elastic member 4 can be turned to, thereby realizing the automatic flipping of the headrest rod assembly 3 and the headrest body.

[0030] Furthermore, the unlocking and resetting elastic member 7 is a torsion spring, and the unlocking and resetting elastic member 7 includes an unlocking and resetting elastic member fixing spring foot end 71 and an unlocking and resetting elastic member connecting spring foot end 72; wherein the unlocking and resetting elastic member 7 is integrally coiled on the connecting shaft member circular shaft body 533, and an unlocking and resetting elastic member positioning hole 213 is provided on the base main panel 21 of the base frame 2, which runs through the thickness direction thereof, and the unlocking and resetting elastic member fixing spring foot end 71 is passed through the unlocking and resetting elastic member positioning hole 213, and the unlocking and resetting elastic member connecting spring foot end 72 extends toward the unlocking shaft member 52, and the unlocking and resetting elastic member connecting spring foot end 72 is hooked on the unlocking shaft member circular shaft body 522 and applies elastic force thereto. The unlocking and resetting elastic member 7 can ensure that the locking plate 51 connected to the unlocking shaft member 53 is kept in a locked state with the engaging positioning plate 33 without applying external force, thereby ensuring safe and reliable use.

[0031] It should be noted that, in the present embodiment, the aforementioned driving elastic member 4 and the unlocking and resetting elastic member 7 are preferably torsion springs. The torsion spring has a simple and reliable structure, is easy to produce and assemble, and has the advantage of good elastic force. At the same time, it can ensure the tightness of the combination between the components in the locked state, and also help to simplify the overall structure and occupied space. Of course, the driving elastic member 4 and the unlocking and resetting elastic member 7 can also adopt other commonly used elastic structures such as springs and elastic pull ropes, which are all within the protection scope of the present utility model.

[0032] Please continue to see Figure 1 and Figure 2The backrest frame assembly 1 includes a backrest frame connecting beam 11 and a backrest frame mounting plate 12 fixedly mounted on the backrest frame connecting beam 11; the backrest frame mounting plate 12 is positioned on the base frame main panel 21 of the base frame 2, and the base frame main panel 21 is fixedly connected to the backrest frame mounting plate 12 by a plurality of base frame main panel fixing bolts 214, so that the base frame 2 and the backrest frame assembly 1 are fixedly connected together; and the base frame side panel 22 is away from the base frame main panel 21 A base side panel ear seat 223 is also formed at the front position, and a locking positioning plate limiting buffer pad 224 is installed on the inner side of the base side panel ear seat 223 facing the aforementioned base main panel 21. The locking positioning plate limiting buffer pad 224 is used to limit the travel range of the aforementioned locking positioning plate 33 and provide buffer protection for it. The locking positioning plate limiting buffer pad 224 can avoid the aforementioned locking positioning plate 33 and the base side panel ear seat 223 from colliding and rubbing, thereby ensuring reliability and safety in use.

[0033] See also Figures 1 to 3 The applicant briefly describes the working principle of the technical solution provided by the utility model: when the headrest folding device in the utility model is in the locked state, the locking plate 51 of the locking assembly 5 is engaged with the engaging positioning plate 33 of the headrest rod assembly 3, and the engaging force between the locking plate 51 and the engaging positioning plate 33 is greater than the elastic force applied by the driving elastic member 4 to the rotating shaft 32, thereby ensuring that the headrest rod assembly 3 is in a fixed locked state; when the headrest needs to be folded, the cable body 61 of the unlocking cable assembly 6 is pulled to drive the cable connector 63 to move, at this time, the elastic force applied by the unlocking reset elastic member 7 to the unlocking shaft member 53 is overcome, and the cable connector 63 further drives the unlocking shaft member 52 of the locking assembly 5 to move , thereby driving the locking plate 51 to rotate, and the locking plate engaging portion 511 of the locking plate 51 is disengaged from the engaging positioning plate matching groove 331, thereby unlocking the engaging positioning plate 33, so that the headrest rod assembly 3 can move, and under the action of the driving elastic member 4, the rotating shaft 32 connected to the engaging positioning plate 33 rotates and drives the headrest rod body 31 to rotate, and finally the headrest is rotated and folded; when the headrest needs to be reset, the headrest is rotated by manually pushing the headrest upwards, and when it is flipped to the locked position, the cable body 61 is released, the reset elastic member 7 is unlocked and driven to rotate the unlocking shaft member 52 and the locking plate 51, so that the locking plate 51 and the engaging positioning plate 33 are engaged and locked together again, realizing automatic locking.

[0034] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

[0035] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A headrest folding device for a vehicle seat, characterized in that: include: A backrest frame assembly (1); a base frame (2), the base frame (2) being fixedly mounted on the backrest frame assembly (1), and the base frame (2) being provided with a base frame main panel (21) and base frame side panels (22) formed on both sides of the base frame main panel (21); a headrest rod assembly (3), the headrest rod assembly (3) being rotatably connected to the base frame (2), and the headrest rod assembly (3) being provided with a pair of headrest rod bodies (31), a rotating shaft (32) connected to the two headrest rod bodies (31), and a pair of engaging positioning plates (33), the two headrest rod bodies (31) being extended in a vertical direction and used for connecting a headrest, the rotating shaft (32) being pivotally connected between the two base frame side panels (22) of the base frame (2), and the two engaging positioning plates (33) being respectively mounted on the length of the rotating shaft (32). two end portions in the degree direction; a driving elastic member (4), the driving elastic member (4) is sleeved on the rotating shaft (32), and the driving elastic member (4) is used to drive the headrest rod assembly (3) to rotate; a locking assembly (5), the locking assembly (5) is used to achieve locking of the headrest rod assembly (3) so as to limit the movement of the headrest rod assembly (3) relative to the base frame (2), and the locking assembly (5) can be engaged and locked with one of the engaging positioning plates (33) of the headrest rod assembly (3); an unlocking cable assembly (6), the unlocking cable assembly (6) is installed on the locking assembly (5) and is used to drive the movement of the locking assembly (5); an unlocking reset elastic member (7), the unlocking reset elastic member (7) is used to apply an elastic force to the locking assembly (5) to achieve locking with the headrest rod assembly (3).

2. The headrest folding device for a vehicle seat according to claim 1, characterized in that: The locking assembly (5) comprises a locking plate (51), an unlocking shaft (52) and a connecting shaft (53); wherein the locking plate (51) is positioned below one of the engaging positioning plates (33) of the headrest rod assembly (3), and the upper portion of the locking plate (51) can be assembled and locked with the lower portion of the engaging positioning plate (33); an axial end portion of the connecting shaft (53) is positioned and installed on a base frame side plate (22) of the base frame (2); the connecting shaft (53) also passes through the base frame side plate (22) and extends toward another side of the base frame (2). The frame side plate (22) is extended, the length direction of the locking plate (51) is maintained in a vertical state with the axial direction of the connecting shaft (53), and the rear part of the locking plate (51) is sleeved on the connecting shaft (53) and is rotatably connected thereto, the unlocking shaft (52) is installed at a lower position of the locking plate (51) away from the front end of the connecting shaft (53), and the unlocking shaft (52) passes out of the locking plate (51) outward, and the unlocking cable assembly (6) can be fixedly connected to the unlocking shaft (52) and drive the unlocking shaft (52) to move.

3. The headrest folding device for a vehicle seat according to claim 2, characterized in that: A locking plate engaging portion (511) is convexly formed at the front upper end position of the locking plate (51) of the locking assembly (5), and an open-mouthed engaging positioning plate matching groove (331) is correspondingly provided on the lower part of the engaging positioning plate (33); the locking plate (51) and the engaging positioning plate (33) have a locked state and an unlocked state. In the locked state, the locking plate engaging portion (511) can be matched and mounted in the engaging positioning plate matching groove (331) to achieve the locking of the locking plate (51) and the engaging positioning plate (33); in the unlocked state, the locking plate engaging portion (511) can slide in the engaging positioning plate matching groove (331) and slide out of the engaging positioning plate matching groove (331), thereby achieving the separation of the locking plate (51) and the engaging positioning plate (33) to achieve unlocking.

4. The headrest folding device for a vehicle seat according to claim 2, characterized in that: The connecting shaft (53) of the locking assembly (5) comprises a connecting shaft installation section (531), a connecting shaft pivot section (532) and a connecting shaft round shaft body (533); wherein the connecting shaft installation section (531) passes through the base frame side plate (22) of the base frame (2) and is matched and fixed with the base frame side plate (22), thereby realizing the positioning and installation of the connecting shaft (53) and the base frame (2); the connecting shaft pivot section (532) is formed at a side position of the connecting shaft installation section (531), and at the rear part of the locking plate (51) of the locking assembly (5). A locking plate pivot hole (512) is provided which runs through the thickness direction thereof, and the connecting shaft pivot section (532) is mounted in cooperation with the locking plate pivot hole (512) to realize rotational cooperation therewith, and a locking plate pivot hole bushing (5121) which is sleeved on the connecting shaft pivot section (532) is also provided in the locking plate pivot hole (512), and the connecting shaft circular shaft body (533) is formed at a side position of the connecting shaft pivot section (532) away from the connecting shaft mounting section (531), and the unlocking and resetting elastic member (7) is provided on the connecting shaft circular shaft body (533).

5. The headrest folding device for a vehicle seat according to claim 4, characterized in that: The unlocking shaft (52) of the locking assembly (5) includes an unlocking shaft fitting section (521), an unlocking shaft circular shaft body (522) and an unlocking shaft fitting head (523); the unlocking shaft fitting section (521) is arranged at the lower position of the front end of the locking plate (51) and is fitted and fixed with the locking plate (51), while the unlocking shaft circular shaft body (522) is formed at a side position of the unlocking shaft fitting section (521); the unlocking reset elastic member (7) can apply a force to the connecting shaft circular shaft body (533), while the unlocking shaft fitting head (523) is formed at one end of the unlocking shaft circular shaft body (522) axially away from the unlocking shaft fitting section (521), and the unlocking shaft fitting head (523) can be fixedly connected with the unlocking cable assembly (6).

6. The headrest folding device for a vehicle seat according to claim 5, characterized in that: The unlocking cable assembly (6) comprises a cable body (61), a cable positioning block (62) and a cable connector (63); wherein a base main panel bottom positioning seat (211) is formed at the bottom of the base main panel (21) of the base frame (2), the cable positioning block (62) is fixedly mounted on the base main panel bottom positioning seat (211), the cable body (61) passes through the cable positioning block (62), and the cable positioning block (62) The cable body (61) can be positioned; the cable connector (63) is fixedly mounted on the top end of the cable body (61), and a zipper connector mating hole (631) is also provided on the cable connector (63); the unlocking shaft mating head (523) on the unlocking shaft (52) is embedded in the zipper connector mating hole (631), so that the unlocking shaft (52) and the cable connector (63) are fixedly connected together.

7. The headrest folding device for a vehicle seat according to claim 1, characterized in that: A rotation axis positioning section (321) is formed at both ends of the rotation axis (32) of the headrest rod assembly (3) in the length direction, and a corresponding engagement positioning plate connecting hole (332) is opened on the engagement positioning plate (33). The shape and size of the engagement positioning plate connecting hole (332) are adapted to the shape and size of the rotation axis positioning section (321), and the rotation axis positioning sections (321) at both ends of the rotation axis (32) can be fitted in their respective corresponding engagement positioning plate connecting holes (332), thereby realizing the positioning connection between the rotation axis (32) and the two engagement positioning plates (33); and a base frame side plate connecting hole (221) is opened on the two base frame side plates (22) of the base frame (2) and at the position corresponding to the rotation axis (32), and a base frame side plate pivot pin (222) is fixedly arranged in the base frame side plate connecting hole (221). ), and a base frame side plate connection hole bushing (2211) is provided in the base frame side plate connection hole (221), and the base frame side plate connection hole bushing (2211) is sleeved on the base frame side plate pivot pin (222); the base frame side plate pivot pin (222) is extended toward the rotation axis (32), and a base frame side plate pivot pin matching section (2221) is also formed on the base frame side plate pivot pin (222), and on the rotation axis (3 A rotating shaft connecting hole (322) is also provided on the rotating shaft positioning section (321) of the base frame (2), and the shape and size of the rotating shaft connecting hole (322) are compatible with the shape and size of the pivot pin shaft matching section (2221) of the base frame side plate, and the pivot pin shaft matching section (2221) of the base frame side plate can be inserted into the rotating shaft connecting hole (322) and realize rotational matching therewith, thereby realizing the rotational connection between the rotating shaft (32) and the base frame (2).

8. The headrest folding device for a vehicle seat according to claim 1, characterized in that: The driving elastic member (4) is a torsion spring, and the driving elastic member (4) includes a driving elastic member fixed spring foot end (41) and a driving elastic member driving spring foot end (42); the driving elastic member (4) is integrally coiled on the rotating shaft (32), and a driving elastic member positioning hole (212) penetrating the thickness direction of the base frame main panel (21) of the base frame (2) is provided, and the driving elastic member fixed spring foot end (41) is inserted into the driving elastic member positioning hole (212), and a rotating shaft power rod (323) is also provided on the rotating shaft (32), and the driving elastic member driving spring foot end (42) abuts against the rotating shaft power rod (323) and applies a rotational torque to it.

9. The headrest folding device for a vehicle seat according to claim 5, characterized in that: The unlocking and resetting elastic member (7) is a torsion spring, and the unlocking and resetting elastic member (7) includes an unlocking and resetting elastic member fixing spring foot end (71) and an unlocking and resetting elastic member connecting spring foot end (72); wherein the unlocking and resetting elastic member (7) is integrally coiled on the connecting shaft member circular shaft body (533), and an unlocking and resetting elastic member positioning hole (213) penetrating the thickness direction thereof is provided on the main frame panel (21) of the frame (2), the unlocking and resetting elastic member fixing spring foot end (71) is passed through the unlocking and resetting elastic member positioning hole (213), and the unlocking and resetting elastic member connecting spring foot end (72) extends toward the unlocking shaft member (52), and the unlocking and resetting elastic member connecting spring foot end (72) is hooked on the unlocking shaft member circular shaft body (522) and applies elastic force thereto.

10. The headrest folding device for a vehicle seat according to claim 1, characterized in that: The backrest frame assembly (1) comprises a backrest frame connecting beam (11) and a backrest frame mounting plate (12) fixedly mounted on the backrest frame connecting beam (11); the backrest frame mounting plate (12) is positioned on a base frame main panel (21) of the base frame (2), and the base frame main panel (21) is fixedly connected to the backrest frame mounting plate (12) by a plurality of base frame main panel fixing bolts (214), so that the base frame (2) and the backrest are fixedly mounted. The skeleton assembly (1) is fixed together; and a base frame side panel ear seat (223) is formed at the front position of the base frame side panel (22) away from the base frame main panel (21), and a snap-fit ​​positioning plate limiting buffer pad (224) is installed on the inner side surface of the base frame side panel ear seat (223) facing the base frame main panel (21), and the snap-fit ​​positioning plate limiting buffer pad (224) is used to limit the travel range of the snap-fit ​​positioning plate (33) and provide buffer protection for it.

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