Automobile seat headrest with adjustable front-back rotation angle and adjusting method thereof

Abstract

The invention discloses an automobile seat headrest with an adjustable front-back rotating angle and an adjusting method of the automobile seat headrest, and particularly relates to the technical field of automobile headrests. A through groove is formed in one end of the top of a mounting frame, a movable connecting plate is embedded in the through groove, and one end of the movable connecting plate is connected with a headrest mounting frame through a rotating connecting mechanism; the end, away from the rotary connecting mechanism, of the headrest mounting frame is connected with a seat headrest through a bolt, and the rotary connecting mechanism comprises a hinge shaft, a rotating cylinder, a first tooth, a movable cylinder, a second tooth, a first spring, a nut, a nut, a connecting cylinder, a limiting block and a sliding groove; the seat headrest can be rotationally adjusted at different gear angles through the rotary connecting mechanism, the comfort degree of the seat headrest is improved, the seat headrest is pulled to drive the movable connecting plate to be pulled out, after the movable connecting plate is pulled to the needed position, a movable block is pushed through a third spring, so that a movable limiting column and a tooth-shaped groove are clamped to achieve fixation, and the seat headrest can be conveniently adjusted. And adjustment of different positions is realized.

Description

Technical Field

[0001] This application relates to the field of automotive headrest technology, and more specifically, to an automotive seat headrest with adjustable front and rear rotation angles and a method for adjusting the same. Background Technology

[0002] Car seat headrests, also known as headrests, are auxiliary devices designed to improve the comfort and safety of car passengers. There are two types of headrests: fixed and movable. In high-back seats, the headrest is integrated with the backrest and cannot be removed. These high-back seats are mainly used in buses, such as large coaches. In low-back seats, the headrest is detachable from the backrest; the headrest is a separate object that is fixed to the backrest using a single or double pin to a socket on the seat back. These low-back seats are mostly used in passenger cars, such as sedans. A search revealed a patent publication number: CN211543334U, which discloses a car seat headrest structure, including a headrest body with an arc-shaped groove. An eye shield is located within the arc-shaped groove and is slidably connected to the headrest body via the groove. Connecting rods are provided on both outer walls of the headrest body, and rotating shafts are fixedly connected to the outer walls of these rods. The connecting rods are rotatably connected to the headrest body via the rotating shafts, and the other ends of the two connecting rods slide on either side of the eye shield. This design avoids the feeling of constriction caused by the eye shield being tightly bound to the head, making resting more comfortable. When not in use, the eye shield can be slid into the arc-shaped groove and stored in the headrest body, preventing it from becoming dirty due to external environmental factors. This protects the eye shield and ensures its cleanliness and tidiness, facilitating multiple uses. The structure is simple, convenient, and highly practical. During the development of this application, the inventors discovered the following problems with the existing technology: Existing car seat headrest structures are often single fixed headrest structures, lacking the ability to adjust the headrest forward and backward or rotate. Furthermore, in the event of a sudden accident, the headrest can only provide a single cushioning effect on the head, failing to provide multi-level cushioning to protect the head as much as possible. Therefore, a car seat headrest with adjustable front and rear rotation angle and its adjustment method are proposed to address the above problems. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this application provides an adjustable front and rear rotation angle car seat headrest and its adjustment method to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a car seat headrest with adjustable front and rear rotation angle, comprising a mounting frame, a through groove at one top end of the mounting frame, a movable connecting plate embedded inside the through groove, a headrest mounting frame connected to the end of the movable connecting plate away from the mounting frame via a rotating connecting mechanism, and a seat headrest connected to the end of the headrest mounting frame away from the rotating connecting mechanism via bolts, the rotating connecting mechanism comprising a hinge shaft, a rotating cylinder, a first tooth, a movable cylinder, and a second tooth, the rotating cylinder being connected to the outer wall of the middle portion of the hinge shaft via a bearing, one end of the outer wall of the rotating cylinder being connected to the headrest mounting frame, a first tooth being provided on both ends of the outer wall of the rotating cylinder, movable cylinders being provided on both sides of the rotating cylinder, both sets of movable cylinders being sleeved on the outer wall of the hinge shaft, and a second tooth being provided at the end of both sets of movable cylinders near the rotating cylinder, the second tooth engaging with the first tooth.

[0005] Preferably, the rotary connection mechanism further includes a first spring, a nut, a connecting cylinder, a limiting block, and a slide groove. The first spring is provided at the end of the movable cylinder away from the rotating cylinder, and a nut is provided at one end of the hinge shaft. A nut is threadedly connected to the outer wall of the end of the hinge shaft away from the nut. The ends of the two sets of first springs away from the movable cylinder respectively abut against the nut and the nut. A connecting cylinder is sleeved on the outer wall of each set of movable cylinders. One side of the outer wall of each set of connecting cylinders is connected to a movable connecting plate. The inner wall of the connecting cylinder matches the nut. A limiting block is connected to one side of the outer wall of the movable cylinder. A slide groove is provided on one side of the inner wall of the connecting cylinder, and the limiting block is embedded in the slide groove.

[0006] Preferably, both sides of the movable connecting plate are provided with strip grooves, the middle of the two sets of strip grooves is provided with toothed grooves, the bottom side of the through groove is provided with an adjustment groove, the edge of the adjustment groove is connected to a fixing plate by screws, the top of the fixing plate is provided with a limiting lifting mechanism, the limiting lifting mechanism is located inside the adjustment groove, the limiting lifting mechanism includes a fixing cylinder, a telescopic column and a second spring, the top inner wall of the fixing cylinder is embedded with a telescopic column, the bottom end of the telescopic column is connected to a second spring, and the end of the second spring away from the telescopic column is connected to the bottom inner wall of the fixing cylinder.

[0007] Preferably, the top of the telescopic column is connected to a connecting piece, and both ends of the top of the connecting piece are connected to fixed limiting posts. The tops of the two sets of fixed limiting posts extend into the through groove and are respectively embedded in the middle of the two side strip grooves. An installation groove is provided at the top center of the connecting piece. A movable block is movably connected to one side of the middle of the installation groove via a rotating shaft. A No. 3 spring is connected to the inner wall of one side of the installation groove. The end of the No. 3 spring is connected to the movable block. A movable limiting post is connected to one side of the top of the movable block. The top of the movable limiting post extends into the through groove and is embedded in the toothed groove.

[0008] Preferably, a magnetic block is embedded in one outer wall of the movable block, an electromagnet is embedded in the inner wall of the mounting groove near the magnetic block, and an independent power supply is embedded in one bottom side of the fixing plate, and the independent power supply is electrically connected to the electromagnet.

[0009] Preferably, a push-button switch is provided on one side of the independent power supply, and the push-button switch is electrically connected to the independent power supply. A controller is provided on one side of the mounting bracket, and a signal receiving module is electrically connected to one side of the controller. The controller is also electrically connected to the push-button switch.

[0010] Preferably, a pull rod is connected to the center of the bottom end of the connecting piece, and a pull block is connected to the end of the pull rod away from the connecting piece through the fixed plate. Window-breaking drill bits are connected to both sides of the outer wall of the movable connecting plate away from the rotating connecting mechanism.

[0011] Preferably, a No. 4 spring is connected to one end of the inner wall of the strip groove, and a buffer block is connected to one end of the No. 4 spring. The outer wall of the buffer block is close to the inner wall of the strip groove, and the buffer block is made of rubber.

[0012] Preferably, the bottom side outer wall of the mounting bracket is provided with a groove, the surface of the groove is provided with seat mounting holes, a card plate is embedded in the middle of the groove, a dressing mirror is provided at the center of the outer wall of the card plate away from the mounting bracket, and a flip cover is connected to the upper part of the outer wall of the card plate by a hinge, the flip cover covers the dressing mirror.

[0013] Preferably, the adjustment method includes the following steps: Step 1: First, connect the mounting bracket to the car seat using bolts and seat mounting holes. After connecting with bolts, insert the clip into the groove for locking. The clip hides the connecting bolts between the mounting bracket and the car seat, while the rear passengers can lift the cover to reveal the vanity mirror, making it convenient for rear passengers to use the mirror for grooming and other needs. Step 2: The headrest angle is fixed to a certain extent by the engagement of tooth 2 with tooth 1. When the headrest angle needs to be adjusted, the headrest can be moved directly to change the angle. When the headrest rotates, it drives the headrest mounting bracket to rotate synchronously. The rotation of the headrest mounting bracket drives the rotating cylinder to rotate synchronously with tooth 1. The rotation of tooth 1 pushes tooth 2 to retract, thereby realizing the rotation of the headrest. After rotating to the designated position, spring 1 pushes the movable cylinder to re-engage tooth 2 with tooth 1, thereby fixing the adjusted headrest angle. Step 3: When it is necessary to change the flexibility of the seat headrest adjustment angle, the nut can be turned by using a screwdriver or other tools. The rotation of the nut will drive the hinge shaft to rotate, and the rotation of the hinge shaft will change the positional relationship between the nut and the hinge shaft, thereby changing the compression degree of the No. 1 spring and thus changing the flexibility of the seat headrest adjustment angle. Step 4: When the position of the seat headrest needs to be changed, pull the seat headrest to pull out the movable connecting plate, so that the movable connecting plate can move horizontally in the through groove. After being pulled to the desired position, the movable block and the movable limit post are moved by the No. 3 spring, so that the movable limit post is engaged with the toothed groove. When the movable connecting plate needs to be inserted into the through groove, press the button switch to power the electromagnet with the independent power supply. The electromagnet generates an attraction force to attract the magnetic block, thereby moving the movable block and the movable limit post to separate the movable limit post from the toothed end of the toothed groove, so that it can be retracted and adjusted. Step 5: Pulling the lever will cause the pull rod and connecting plate to move downwards. The movement of the connecting plate will cause the fixed limit post and the movable limit post to move downwards, thus moving the fixed limit post and the movable limit post out of the strip groove and toothed groove respectively. This will eliminate the limiting connection between the movable connecting plate and the through groove. Pulling the seat headrest will separate the movable connecting plate from the mounting bracket, making it easy to replace different types of seat headrests. In case of emergency, the movable connecting plate can be pulled out, and the window breaker at the end of the movable connecting plate can be used to break the window, so that the window can be broken quickly to escape if the car door cannot be opened in the event of an accident.

[0014] The technical effects and advantages of this application are as follows: 1. Compared with existing technologies, this adjustable car seat headrest and its adjustment method fix the headrest angle to a certain extent by interlocking the No. 2 tooth with the No. 1 tooth. When the headrest angle needs to be adjusted, the headrest can be directly moved to change the angle. When the headrest rotates, it drives the headrest mounting bracket to rotate synchronously. The rotation of the headrest mounting bracket drives the rotating cylinder to rotate synchronously with the No. 1 tooth. The rotation of the No. 1 tooth pushes the No. 2 tooth to retract, thereby realizing the rotation of the headrest. After rotating to the designated position, the No. 1 spring pushes the movable cylinder to re-engage with the No. 2 tooth with the No. 1 tooth, thereby fixing the adjusted headrest angle. Through the rotating connection mechanism, the headrest can be rotated and adjusted to different angles, improving the comfort of the headrest.

[0015] 2. Compared with the prior art, this car seat headrest with adjustable front and rear rotation angle and its adjustment method can pull the headrest to drive the movable connecting plate out when the position of the headrest needs to be changed. The movable connecting plate can move horizontally in the through groove. After being pulled to the desired position, the movable block and the movable limiting post are moved by the No. 3 spring. The movable limiting post is locked to the toothed groove to achieve fixation, thus realizing adjustment of different positions.

[0016] 3. Compared with existing technologies, this adjustable car seat headrest with front and rear rotation angle and its adjustment method can transmit signals to the controller through the signal receiving module when the in-vehicle sensor detects a car accident. The controller controls the button switch to energize the electromagnet with an independent power supply. The energized electromagnet pulls the magnetic block to attract, thereby moving the movable block and the movable limit post to separate the movable limit post from the toothed end of the toothed groove, so that the movable connecting plate is in a movable state. When the passenger's head hits the seat headrest during a car accident, the soft material of the seat headrest provides primary cushioning. Then, the seat headrest pushes the movable connecting plate into the groove. The movement of the movable connecting plate drives the strip groove to move. When the buffer block on one side of the strip groove abuts against the fixed limit post, the No. 4 spring absorbs the kinetic energy to achieve secondary cushioning. At the same time, the close contact between the buffer block and the strip groove generates damping during the movement. The damping generated by friction can counteract the rebound after the No. 4 spring cushioning. Through two cushioning, the passenger's head can be protected as much as possible, reducing the impact. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of this application; Figure 2 This is a schematic diagram of the overall structure of the blackboard in this application; Figure 3 This is a schematic diagram of the connection structure between the fixing plate and the connecting piece in this application; Figure 4 This is a front view structural diagram of this application; Figure 5 This is a schematic diagram of the rotary connection mechanism structure of this application; Figure 6 This is a schematic diagram of the connection structure between the card plate and the flip cover in this application; Figure 7 This is a schematic diagram of the internal structure of the adjusting groove and the limiting lifting mechanism in this application; Figure 8 This is a schematic diagram of the connecting piece structure of this application.

[0018] The attached diagram is labeled as follows: 1. Mounting bracket; 2. Through groove; 3. Movable connecting plate; 4. Rotary connecting mechanism; 401. Hinge shaft; 402. Rotating cylinder; 403. First tooth; 404. Movable cylinder; 405. Second tooth; 406. First spring; 407. Nut; 408. Nut; 409. Connecting cylinder; 410. Limiting block; 411. Slide groove; 5. Headrest mounting bracket; 6. Seat headrest; 7. Strip groove; 8. Toothed groove; 9. Adjustment groove; 10. Fixing plate; 11. Limiting lifting mechanism; 111. Fixing cylinder; 112. Telescopic column; 113. Spring No. 2; 12. Connecting piece; 13. Fixed limit post; 14. Mounting groove; 15. Movable block; 16. Spring No. 3; 17. Movable limit post; 18. Magnetic block; 19. Electromagnet; 20. Independent power supply; 21. Push button switch; 22. Controller; 221. Signal receiving module; 23. Pull rod; 24. Pull block; 25. Window breaker drill bit; 26. Spring No. 4; 27. Buffer block; 28. Groove; 29. ​​Seat mounting hole; 30. Card plate; 31. Dressing mirror; 32. Flip cover. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0020] As attached Figures 1 to 8 The car seat headrest shown is adjustable in front and rear rotation angle, including a mounting frame 1. A through groove 2 is provided at one top end of the mounting frame 1. A movable connecting plate 3 is embedded inside the through groove 2. The end of the movable connecting plate 3 away from the mounting frame 1 is connected to a headrest mounting frame 5 via a rotating connecting mechanism 4. The end of the headrest mounting frame 5 away from the rotating connecting mechanism 4 is connected to a seat headrest 6 via bolts. The rotating connecting mechanism 4 includes a hinge shaft 401, a rotating cylinder 402, a first gear 403, a movable cylinder 404, and a second gear. 405, the outer wall of the middle part of the hinge shaft 401 is connected to a rotating cylinder 402 via a bearing. One end of the outer wall of the rotating cylinder 402 is connected to the headrest mounting bracket 5. Both ends of the outer wall of the rotating cylinder 402 are provided with a first tooth 403. Both sides of the rotating cylinder 402 are provided with movable cylinders 404. Both sets of movable cylinders 404 are sleeved on the outer wall of the hinge shaft 401. The ends of both sets of movable cylinders 404 near the rotating cylinder 402 are provided with a second tooth 405. The second tooth 405 meshes with the first tooth 403. The mounting bracket 1 serves to install and connect the car seat. The connecting plate 3 can move horizontally inside the through groove 2 to adjust the position of the headrest 6. The rotating cylinder 402 can rotate in the middle of the hinge shaft 401. The rotating cylinder 402 is connected to the headrest mounting bracket 5 so that the headrest mounting bracket 5 and the headrest 6 rotate synchronously. The position of the rotating cylinder 402 is limited by the engagement between the second tooth 405 and the first tooth 403 to prevent the headrest 6 from rotating arbitrarily. The rotating connecting mechanism 4 can adjust the headrest 6 to different angles, improving the comfort of the headrest 6. Example 2

[0021] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 8 As shown below, see details: In a preferred embodiment, the rotary connection mechanism 4 further includes a first spring 406, a nut 407, a nut 408, a connecting cylinder 409, a limiting block 410, and a slide groove 411. A first spring 406 is provided at the end of the movable cylinder 404 away from the rotating cylinder 402. A nut 407 is provided at one end of the hinge shaft 401. A nut 408 is threadedly connected to the outer wall of the end of the hinge shaft 401 away from the nut 407. The ends of the two sets of first springs 406 away from the movable cylinder 404 respectively abut against the nut 407 and the nut 408. A connecting cylinder 409 is sleeved on the outer wall of each of the two sets of movable cylinders 404. One side of the outer wall of each of the two sets of connecting cylinders 409 is connected to the movable connecting plate 3. The inner wall of the connecting cylinder 409 matches the nut 408. A limiting block 410 is connected to one side of the outer wall of the movable cylinder 404. A slide groove 411 is provided on one side of the inner wall of the connecting cylinder 409. The positioning block 410 is embedded in the slide groove 411. The first spring 406 pushes the movable cylinder 404 towards the rotating cylinder 402, thereby keeping the second tooth 405 and the first tooth 403 in an engaged state. The tool can drive the nut 407 to rotate, which in turn drives the hinge shaft 401 to rotate. The rotation of the hinge shaft 401 changes the positional relationship between the nut 408 and the hinge shaft 401, thereby changing the degree of compression of the first spring 406 and thus changing the flexibility of the seat headrest 6 adjustment angle. The connecting cylinder 409 serves to connect the movable connecting plate 3. At the same time, the limiting block 410 is embedded in the slide groove 411 to keep the angle of the movable cylinder 404 and the connecting cylinder 409 consistent, preventing the rotating cylinder 402 from driving the movable cylinder 404 to rotate synchronously during rotation.

[0022] In a preferred embodiment, both sides of the movable connecting plate 3 are provided with strip grooves 7, and the middle of the two sets of strip grooves 7 is provided with toothed grooves 8. An adjusting groove 9 is provided on one side of the bottom of the through groove 2. A fixing plate 10 is connected to the edge of the adjusting groove 9 by screws. A limiting lifting mechanism 11 is arranged on the top of the fixing plate 10. The limiting lifting mechanism 11 is located inside the adjusting groove 9. The limiting lifting mechanism 11 includes a fixing cylinder 111, a telescopic column 112, and a second spring 113. The telescopic column 112 is embedded in the top inner wall of the fixing cylinder 111. The bottom end of the telescopic column 112 is connected to the second spring 113. The end of the second spring 113 away from the telescopic column 112 is connected to the bottom inner wall of the fixing cylinder 111. The strip groove 7 and the toothed groove 8 serve as limiting connections. The strip groove 7, in conjunction with the fixed limiting post 13, guides and limits the movement of the movable connecting plate 3. The toothed groove 8, in conjunction with the movable limiting post 17, positions and fixes the movable connecting plate 3, enabling adjustment to different positions. The fixed plate 10 serves as a fixing mechanism and can be fixedly connected to the mounting bracket 1. The limiting lifting mechanism 11 connects and limits the fixed plate 10 and the connecting piece 12. At the same time, the second spring 113 provides support and lift, allowing the connecting piece 12 to abut against the top of the adjusting groove 9 without external interference. This allows the fixed limiting post 13 and the movable limiting post 17 to limit the connection of the movable connecting plate 3.

[0023] In a preferred embodiment, a connecting piece 12 is connected to the top of the telescopic column 112. Fixed limiting posts 13 are connected to both ends of the top of the connecting piece 12. The tops of both sets of fixed limiting posts 13 extend into the through groove 2 and are respectively embedded in the middle of the two side strip grooves 7. An installation groove 14 is provided at the center of the top of the connecting piece 12. A movable block 15 is movably connected to one side of the middle of the installation groove 14 via a rotating shaft. A No. 3 spring 16 is connected to the inner wall of one side of the installation groove 14. The end of the No. 3 spring 16 is connected to the movable block 15. A movable limiting post 17 is connected to one side of the top of the movable block 15, and the top of the movable limiting post 17 extends into the through groove 2. The seat headrest 6 is embedded in the toothed groove 8. The mounting groove 14 serves as a limit for the movable block 15. The movable block 15 can rotate in the mounting groove 14 via a movable shaft. Under the push of the No. 3 spring 16, the movable limit post 17 can always be engaged at the toothed groove of the toothed groove 8, thereby limiting and fixing it. When it is necessary to change the position of the seat headrest 6, the seat headrest 6 can be pulled to drive the movable connecting plate 3 out, so that the movable connecting plate 3 can move in the through groove 2. After being pulled to the desired position, the No. 3 spring 16 pushes the movable block 15 and the movable limit post 17 to move, so that the movable limit post 17 is engaged with the toothed groove 8.

[0024] In a preferred embodiment, a magnetic block 18 is embedded in one outer wall of the movable block 15, and an electromagnet 19 is embedded in the inner wall of the mounting groove 14 near the magnetic block 18. An independent power supply 20 is embedded in one bottom side of the fixing plate 10. The independent power supply 20 is electrically connected to the electromagnet 19. The magnetic block 18 can be attracted by the electromagnet 19. By pressing the button switch 21, the independent power supply 20 supplies power to the electromagnet 19. The electromagnet 19 generates an attraction force to attract the magnetic block 18, thereby moving the movable block 15 and the movable limiting post 17 to separate the movable limiting post 17 from the toothed end of the toothed groove 8, so as to facilitate its retraction and adjustment. The independent power supply 20 is a battery, which can be replaced periodically or connected to an external power source.

[0025] In a preferred embodiment, a push-button switch 21 is provided on one side of the independent power supply 20, and the push-button switch 21 is electrically connected to the independent power supply 20. A controller 22 is provided on one side of the mounting bracket 1, and a signal receiving module 221 is electrically connected to one side of the controller 22. The controller 22 is also electrically connected to the push-button switch 21. When the in-vehicle sensor detects a car accident, it can transmit the signal to the controller 22 through the signal receiving module 221. The controller 22 controls the push-button switch 21 to energize the electromagnet 19 caused by the independent power supply 20. The energized electromagnet 19 pulls the magnetic block 18 to attract it, thereby causing the movable block 15 and the movable limiting post 17 to move, so that the movable limiting post 17 and the tooth... The toothed ends of the groove 8 separate, allowing the movable connecting plate 3 to be in a movable state. When the passenger's head hits the seat headrest 6 during a car accident, the soft material of the seat headrest 6 provides primary cushioning. Subsequently, the seat headrest 6 pushes the movable connecting plate 3 to move into the through groove. The movement of the movable connecting plate 3 drives the strip groove 7 to move. When the buffer block 27 on one side of the strip groove 7 abuts against the fixed limiting post 13, the No. 4 spring 26 can absorb kinetic energy to achieve secondary cushioning. At the same time, the buffer block 27 and the strip groove 7 are close together, which generates damping during the movement. The damping generated by friction can counteract the rebound after the No. 4 spring 26 has cushioned the impact. Through two cushionings, the passenger's head can be protected as much as possible, reducing the impact.

[0026] In a preferred embodiment, a pull rod 23 is connected to the center of the bottom end of the connecting piece 12. The end of the pull rod 23 away from the connecting piece 12 passes through the fixed plate 10 and is connected to a pull block 24. Both sides of the outer wall of the movable connecting plate 3 away from the rotating connecting mechanism 4 are connected to window-breaking drill bits 25. By pulling the pull block 24, the pull rod 23 and the connecting piece 12 can be moved downwards. The translation of the connecting piece 12 causes the fixed limiting post 13 and the movable limiting post 17 to be moved downwards, so that the fixed limiting post 13 and the movable limiting post 17 are moved out of the strip groove 7 and the toothed groove 8 respectively, so that there is no limiting connection between the movable connecting plate 3 and the through groove 2. Pulling the seat headrest 6 can separate the movable connecting plate 3 from the mounting bracket 1, so that in case of emergency, the movable connecting plate 3 can be pulled out and the window can be broken by the window-breaking drill bit 25 at the end of the movable connecting plate 3, so that the window can be broken quickly to escape when the car door cannot be opened in case of an accident.

[0027] In a preferred embodiment, a No. 4 spring 26 is connected to one end of the inner wall of the strip groove 7, and a buffer block 27 is connected to one end of the No. 4 spring 26. The outer wall of the buffer block 27 is close to the inner wall of the strip groove 7. The buffer block 27 is made of rubber. The No. 4 spring 26 can absorb kinetic energy to achieve buffering. At the same time, the close proximity of the buffer block 27 to the strip groove 7 generates damping during movement. The damping generated by friction can offset the impact of the rebound after the No. 4 spring 26 buffers.

[0028] In a preferred embodiment, a groove 28 is provided on one side of the bottom outer wall of the mounting bracket 1. Seat mounting holes 29 are arranged on the surface of the groove 28. A retaining plate 30 is embedded in the middle of the groove 28. A vanity mirror 31 is provided at the center of the outer wall of the retaining plate 30 away from the mounting bracket 1. A flip cover 32 is connected to the upper part of the outer wall of the retaining plate 30 by a hinge. The flip cover 32 covers the vanity mirror 31. The mounting bracket 1 can be connected to the car seat by bolts through the seat mounting holes 29. The retaining plate 30 hides the connecting bolts between the mounting bracket 1 and the car seat. At the same time, the rear passengers can lift the flip cover 32 to reveal the vanity mirror 31, which is convenient for the rear passengers to use a mirror for grooming.

[0029] The adjustment method includes the following steps: Step 1: First, connect the mounting bracket 1 to the car seat via bolts and seat mounting holes 29. After bolt connection, insert the clip 30 into the groove 28 for locking. The clip 30 hides the connecting bolts between the mounting bracket 1 and the car seat, while the rear passengers can lift the cover 32 to reveal the vanity mirror 31, which is convenient for the rear passengers to use for grooming and other needs. Step 2: The angle of the headrest 6 is fixed to a certain extent by the engagement of tooth 405 and tooth 403. When the angle of the headrest 6 needs to be adjusted, the headrest 6 can be moved directly to change the angle. When the headrest 6 rotates, it drives the headrest mounting bracket 5 to rotate synchronously. The rotation of the headrest mounting bracket 5 drives the rotating cylinder 402 and tooth 403 to rotate synchronously. The rotation of tooth 403 pushes tooth 405 to retract, thereby realizing the rotation of the headrest 6. After rotating to the designated position, spring 406 pushes the movable cylinder 404 and tooth 405 to re-engage with tooth 403, thereby fixing the headrest 6 after the angle adjustment. Step 3: When it is necessary to change the flexibility of the adjustment angle of the seat headrest 6, the nut 407 can be rotated by using a screwdriver or other tools. The rotation of the nut 407 will drive the hinge shaft 401 to rotate. The rotation of the hinge shaft 401 will change the positional relationship between the nut 408 and the hinge shaft 401, thereby changing the compression degree of the first spring 406 and thus changing the flexibility of the adjustment angle of the seat headrest 6. Step 4: When the position of the seat headrest 6 needs to be changed, the seat headrest 6 can be pulled to pull out the movable connecting plate 3, so that the movable connecting plate 3 can move horizontally in the through groove 2. After being pulled to the desired position, the movable block 15 and the movable limiting post 17 are moved by the No. 3 spring 16, so that the movable limiting post 17 can be engaged with the toothed groove 8. When the movable connecting plate 3 needs to be inserted into the through groove 2, the button switch 21 can be pressed to power the electromagnet 19 by the independent power supply 20. The electromagnet 19 generates an attraction force to attract the magnetic block 18, so as to move the movable block 15 and the movable limiting post 17, so that the movable limiting post 17 is separated from the toothed end of the toothed groove 8, thus facilitating its retraction and adjustment. Step 5: Pulling the pull block 24 will cause the pull rod 23 and the connecting piece 12 to move downwards. The moving connecting piece 12 will cause the fixed limiting post 13 and the movable limiting post 17 to move downwards, so that the fixed limiting post 13 and the movable limiting post 17 will move out of the strip groove 7 and the toothed groove 8 respectively, so that there is no limiting connection between the movable connecting plate 3 and the through groove 2. Pulling the seat headrest 6 can separate the movable connecting plate 3 from the mounting bracket 1, so as to replace different types of seat headrests 6. At the same time, in case of emergency, the movable connecting plate 3 can be pulled out, and the window can be broken by the window breaker drill bit 25 at the end of the movable connecting plate 3, so that the window can be broken quickly to escape when the car door cannot be opened in the event of an accident.

[0030] The working process of this application is as follows: First, the mounting bracket 1 is connected to the car seat via bolts and seat mounting holes 29. After bolt connection, the clamping plate 30 is inserted into the groove 28 for locking. The clamping plate 30 hides the connecting bolts between the mounting bracket 1 and the car seat, while allowing rear passengers to lift the flip cover 32 to reveal the vanity mirror 31, facilitating their needs for grooming and other purposes. When the angle of the headrest 6 needs to be adjusted, the headrest 6 can be directly moved to change the angle. When the headrest 6 rotates, it drives the headrest mounting bracket 5 to rotate synchronously. The rotation of the headrest mounting bracket 5 drives the rotating cylinder 4. 02 rotates synchronously with tooth 403. The rotation of tooth 403 pushes tooth 405 to retract, thereby realizing the rotation of headrest 6. After rotating to the designated position, spring 406 pushes movable cylinder 404 and tooth 405 to re-engage with tooth 403, thereby fixing headrest 6 after angle adjustment. When the position of headrest 6 needs to be changed, headrest 6 can be pulled to pull out movable connecting plate 3. After being pulled to the desired position, spring 16 pushes movable block 15 and movable limit post 17 to move, thereby engaging toothed groove 8 through movable limit post 17. Pulling the pull block 24 causes the pull rod 23 and connecting piece 12 to move downwards. This movement of the connecting piece 12 causes the fixed limiting post 13 and movable limiting post 17 to move downwards, thus moving them out of the strip groove 7 and toothed groove 8 respectively. This eliminates the limiting connection between the movable connecting plate 3 and the through groove 2. Pulling the seat headrest 6 separates the movable connecting plate 3 from the mounting bracket 1, facilitating the replacement of different types of seat headrests. In an emergency, the movable connecting plate 3 can be pulled out, and the window can be broken using the window-breaking drill bit 25 at its end, allowing for quick escape if the doors cannot be opened in an accident. When the in-vehicle sensors detect a car accident, the signal is transmitted to the controller 22 via the signal receiving module 221. The controller 22 then controls the button switch 21 to activate the independent power supply 20 to power the electromagnet 19. When energized, the electromagnet 19 pulls the magnetic block 18 to attract it, thereby moving the movable block 15 and the movable limiting post 17, causing the movable limiting post 17 to separate from the toothed end of the toothed groove 8, making the movable connecting plate 3 movable. During a car accident, when the passenger's head hits the seat headrest 6, the soft material of the seat headrest 6 provides primary cushioning. Subsequently, the seat headrest 6 pushes the movable connecting plate 3 to move into the through groove. The movement of the movable connecting plate 3 causes the strip groove 7 to move. When the buffer block 27 on one side of the strip groove 7 abuts against the fixed limiting post 13, the No. 4 spring 26 absorbs the kinetic energy to achieve secondary cushioning. At the same time, the buffer block 27 and the strip groove 7 are close together, generating damping during the movement. The damping generated by friction can counteract the rebound after the No. 4 spring 26 cushions the impact. Through two cushionings, the passenger's head can be protected as much as possible, reducing the impact.

Claims

1. A car seat headrest with adjustable forward and backward rotation angle, comprising a mounting frame (1), characterized in that: A through slot (2) is provided at one end of the top of the mounting frame (1), a movable connecting plate (3) is embedded in the interior of the through slot (2), an end of the movable connecting plate (3) away from the mounting frame (1) is connected to a headrest mounting frame (5) via a rotating connection mechanism (4), an end of the headrest mounting frame (5) away from the rotating connection mechanism (4) is connected to a seat headrest (6) via bolts, the rotating connection mechanism (4) comprising a hinge shaft (401), a rotating cylinder (402), a first tooth (403), a movable cylinder (404) and a second tooth (405), the hinge shaft (401) A rotating cylinder (402) is connected to the middle outer wall of the rotating cylinder (402) via a bearing, the outer wall of one end of the rotating cylinder (402) is connected to the headrest mounting frame (5), first teeth (403) are provided on the outer walls of both ends of the rotating cylinder (402), movable cylinders (404) are provided on both sides of the rotating cylinder (402), two groups of movable cylinders (404) are sleeved on the outer wall of the hinge shaft (401), and second teeth (405) are provided at one end of the two groups of movable cylinders (404) close to the rotating cylinder (402), and the second teeth (405) are engaged with the first teeth (403).

2. The car seat headrest with adjustable front and rear rotation angle according to claim 1, characterized in that: The rotary connection mechanism (4) further comprises a No. 1 spring (406), a nut (407), a nut (408), a connecting tube (409), a stopper (410) and a slide groove (411); a No. 1 spring (406) is arranged at one end of the movable tube (404) away from the rotating tube (402); a nut (407) is arranged at one end of the hinge shaft (401); a nut (408) is threadedly connected to the outer wall of one end of the hinge shaft (401) away from the nut (407); two groups of the No. 1 springs (406) are arranged away from the movable tube (404) ) are respectively in contact with the nut (407) and the nut (408), the outer walls of the two groups of movable cylinders (404) are sleeved with connecting cylinders (409), one side outer walls of the two groups of connecting cylinders (409) are connected to the movable connecting plate (3), the inner wall of the connecting cylinder (409) matches the nut (408), one side outer wall of the movable cylinder (404) is connected to a limiting block (410), one side inner wall of the connecting cylinder (409) is provided with a sliding groove (411), and the limiting block (410) is embedded in the sliding groove (411).

3. The car seat headrest with adjustable front and rear rotation angle according to claim 2, characterized in that: The surfaces of both sides of the movable connecting plate (3) are provided with strip grooves (7), and tooth grooves (8) are provided in the middle of the two groups of the strip grooves (7). An adjustment groove (9) is provided on one side of the bottom of the through groove (2), and a fixing plate (10) is connected to the edge of the adjustment groove (9) by screws. A limited lifting mechanism (11) is arranged on the top of the fixing plate (10), and the limited lifting mechanism (11) is arranged inside the adjustment groove (9). The limited lifting mechanism (11) comprises a fixed cylinder (111), a telescopic column (112) and a second spring (113). The top inner wall of the fixed cylinder (111) is embedded with the telescopic column (112), and the bottom end of the telescopic column (112) is connected to the second spring (113), and the end of the second spring (113) away from the telescopic column (112) is connected to the bottom inner wall of the fixed cylinder (111).

4. The car seat headrest with adjustable front and rear rotation angle according to claim 3, characterized in that: The top of the telescopic column (112) is connected to a connecting piece (12), and both ends of the top of the connecting piece (12) are connected to fixed limiting columns (13). The tops of the two groups of fixed limiting columns (13) extend into the through slot (2) and are respectively embedded in the middle of the strip-shaped slots (7) on both sides. A mounting groove (14) is provided at the center of the top of the connecting piece (12). A movable block (15) is movably connected to one side of the middle of the mounting groove (14) through a rotating shaft. A No. 3 spring (16) is connected to the inner wall of one side of the mounting groove (14). The end of the No. 3 spring (16) is connected to the movable block (15). A movable limiting column (17) is connected to one side of the top of the movable block (15). The top of the movable limiting column (17) extends into the through slot (2) and is embedded in the toothed slot (8).

5. The car seat headrest with adjustable front and rear rotation angle according to claim 4, characterized in that: A magnetic block (18) is embedded in an outer wall of one side of the movable block (15); an electromagnet (19) is embedded in an inner wall of a side of the mounting groove (14) close to the magnetic block (18); an independent power source (20) is embedded in a bottom side of the fixed plate (10); and the independent power source (20) is electrically connected to the electromagnet (19).

6. The car seat headrest with adjustable front and rear rotation angle according to claim 5, characterized in that: A button switch (21) is provided on one side of the independent power source (20), and the button switch (21) is electrically connected to the independent power source (20). A controller (22) is provided on one side of the mounting frame (1), and a signal receiving module (221) is electrically connected to one side of the controller (22), and the controller (22) and the button switch (21) are also electrically connected.

7. The car seat headrest with adjustable front and rear rotation angle according to claim 5, characterized in that: A pull rod (23) is connected to the center of the bottom end of the connecting plate (12); an end of the pull rod (23) away from the connecting plate (12) passes through the fixed plate (10) and is connected to a pull block (24); and both sides of the outer wall of the end of the movable connecting plate (3) away from the rotating connecting mechanism (4) are connected to window breaking drill bits (25).

8. The car seat headrest with adjustable front and rear rotation angle according to claim 4, characterized in that: A No. 4 spring (26) is connected to the end of the inner wall of one side of the strip groove (7), and one end of the No. 4 spring (26) is connected to a buffer block (27). The outer wall of the buffer block (27) is close to the inner wall of the strip groove (7), and the buffer block (27) is made of rubber.

9. The car seat headrest with adjustable front and rear rotation angle according to claim 6, characterized in that: A groove (28) is provided on the outer wall of one side of the bottom of the mounting frame (1); seat mounting holes (29) are arranged on the surface of the groove (28); a card plate (30) is embedded in the middle of the groove (28); a dressing mirror (31) is provided at the center of the outer wall of the card plate (30) away from the mounting frame (1); a flap (32) is connected to the upper side of the outer wall of the card plate (30) via a hinge; the flap (32) covers the dressing mirror (31).

10. A method for adjusting a car seat headrest with adjustable front and rear rotation angle, using the car seat headrest with adjustable front and rear rotation angle as claimed in any one of claims 1 to 9, characterized in that: The adjustment method comprises the following steps: Step 1: First, the mounting frame (1) is connected to the car seat through bolts and the seat mounting hole (29), and after the bolt connection, the clamping plate (30) is embedded in the groove (28) for clamping, and the connecting bolts between the mounting frame (1) and the car seat are hidden by the clamping plate (30) while the rear passenger can open the flip cover (32) to display the dressing mirror (31); Step 2: The angle of the seat headrest (6) is fixed by engaging the second tooth (405) with the first tooth (403). When the angle of the seat headrest (6) needs to be adjusted, the seat headrest (6) can be directly moved to change the angle. When the seat headrest (6) rotates, the headrest mounting frame (5) is driven to rotate synchronously. The rotation of the headrest mounting frame (5) drives the rotating cylinder (402) and the first tooth (403) to rotate synchronously. The first tooth (403) rotates to push the second tooth (405) to contract, thereby realizing the rotation of the seat headrest (6). After rotating to a specified position, the movable cylinder (404) and the second tooth (405) are pushed by the first spring (406) to engage with the first tooth (403) again, thereby realizing the fixation of the seat headrest (6) after the angle adjustment. Step 3: When the flexibility of the seat headrest (6) in adjusting the angle needs to be changed, the nut (407) can be rotated by using a tool such as a screwdriver, and the rotation of the nut (407) drives the hinge shaft (401) to rotate, and the rotation of the hinge shaft (401) changes the positional relationship between the nut (408) and the hinge shaft (401), thereby changing the degree of compression of the first spring (406) and changing the flexibility of the seat headrest (6) in adjusting the angle; Step 4: When the position of the seat headrest (6) needs to be changed, the seat headrest (6) can be pulled to drive the movable connecting plate (3) to be pulled out, so that the movable connecting plate (3) can be translated in the through slot (2). After being pulled to the desired position, the movable block (15) and the movable limiting column (17) are pushed to move by the No. 3 spring (16), so that the movable limiting column (17) and the toothed slot (8) are engaged. When the movable connecting plate (3) needs to be extended into the through slot (2), the button switch (21) can be pressed to make the independent power supply (20) supply power to the electromagnet (19). The electromagnet (19) is energized to generate an adsorption force, so that the magnetic block (18) is adsorbed, thereby driving the movable block (15) and the movable limiting column (17) to move, so that the movable limiting column (17) is separated from the toothed slot end of the toothed slot (8), so as to facilitate its contraction adjustment; Step 5: By pulling the pull block (24), the pull rod (23) and the connecting piece (12) can be driven to move in a translational manner downwards. The translation of the connecting piece (12) drives the fixed limiting column (13) and the movable limiting column (17) to move in a translational manner downwards, so that the fixed limiting column (13) and the movable limiting column (17) are respectively moved out of the strip groove (7) and the toothed groove (8), so that there is no limiting connection between the movable connecting plate (3) and the through groove (2). The seat headrest (6) can be pulled to separate the movable connecting plate (3) from the mounting frame (1), so as to facilitate the replacement of different types of seat headrests (6). At the same time, in case of emergency, the movable connecting plate (3) can be pulled out, and the window can be broken by the window breaking drill bit (25) at the end of the movable connecting plate (3), so that when an accident occurs and the door cannot be opened, the window can be quickly broken to escape.

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