Car seat headrest with adjustable front and rear rotation angle and adjustment method thereof

Abstract

The present application discloses a car seat headrest with adjustable front and rear rotation angles and its adjustment method, specifically relating to the technical field of car headrests, wherein a through slot is provided at one end of the top of the mounting frame, and a movable connecting plate is embedded in the interior of the through slot, and one end of the movable connecting plate is connected to the headrest mounting frame through a rotating connection mechanism, and the end of the headrest mounting frame away from the rotating connection mechanism is connected to the seat headrest by a bolt, and the rotating connection mechanism includes a hinge shaft, a rotating cylinder, a No. 1 tooth, a movable cylinder, a No. 2 tooth, a No. 1 spring, a nut, a nut, a connecting cylinder, a limit block and a slide groove; the present application can adjust the seat headrest to different gear angles through the rotating connection mechanism, thereby improving the comfort of the seat headrest, and by pulling the seat headrest, the movable connecting plate is pulled out, and after being pulled to the required position, the movable block is pushed by the No. 3 spring so that the movable limit column and the toothed groove are engaged and fixed, thereby achieving adjustment to different positions.

Description

Technical Field

[0001] The present application relates to the technical field of automobile headrests, and more specifically, to an automobile seat headrest with adjustable front and rear rotation angles and an adjustment method thereof. Background Art

[0002] Car seat safety headrests, also known as backrests, are auxiliary devices designed to improve car ride comfort and safety. Seat safety headrests are divided into fixed and movable types. In high-back seats, the headrest and backrest are made into one piece and cannot be removed. Such high-back seats are mainly used in passenger vehicles, such as buses. In low-back seats, the headrest and backrest are detachable. The headrest is a separate object that is inserted into the seat backrest socket with a single or double pin and fixed to the backrest. Such low-back seats are mostly used in passenger vehicles, such as sedans.

[0003] After searching, the existing patent publication number: CN211543334U discloses a car seat headrest structure, including a pillow body, an arc-shaped groove is opened on the pillow body, an eye mask is arranged in the arc-shaped groove, the eye mask is slidably connected to the pillow body through the arc-shaped groove, and the outer walls of the two sides of the pillow body are provided with connecting rods, the outer walls of the connecting rods are fixedly connected to the rotating shaft, the connecting rods are rotatably connected to the pillow body through the rotating shaft, and the other ends of the two connecting rods slide on both sides of the eye mask respectively; this avoids the passenger from feeling restrained by the eye mask being tied tightly to the head, making the passenger more comfortable when resting. When not in use, the eye mask is slid into the arc-shaped groove and stored in the pillow body, avoiding the eye mask from being dirty due to the influence of the external environment, protecting the eye mask, and ensuring the cleanliness and tidiness of the eye mask, so that it is convenient for multiple use, simple in structure, easy to use, and highly practical. In the process of realizing this application, the inventor found that the existing technology has the following problems:

[0004] Existing car seat headrests are often single fixed structures that lack forward and backward adjustment and rotation. Furthermore, in the event of an accident, headrests can only provide a single cushioning effect on the head, and are unable to provide multi-level cushioning to protect the head as much as possible.

[0005] Therefore, in order to solve the above problems, a car seat headrest with adjustable front and rear rotation angle and an adjustment method thereof are proposed.

[0006] Application Contents

[0007] In order to overcome the above-mentioned defects of the prior art, the present application provides a car seat headrest with adjustable front and rear rotation angles and an adjustment method thereof to solve the problems raised in the above-mentioned background technology.

[0008] The cam is secured to the seat with an angular channel formed between a top and a bottom of the cam, and the cam has a channel slot that receives the camshaft to move along the top of the cam, the channel slots being secured to the seat with an angular channel that receives the camshaft to move along the top of the cam.

[0009] Preferably, the rotating connection mechanism also includes a No. 1 spring, a nut, a nut, a connecting tube, a limit block and a slide groove. A No. 1 spring is provided at one end of the movable tube away from the rotating tube, a nut is provided at one end of the hinge shaft, and 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 groups of No. 1 springs away from the movable tube are respectively in contact with the nut and the nut. The outer walls of the two groups of movable tubes are both sleeved with connecting tubes, and one side outer wall of the two groups of connecting tubes is connected to the movable connecting plate. The inner wall of the connecting tube matches the nut, and one side outer wall of the movable tube is connected to the limit block. The inner wall of one side of the connecting tube is provided with a slide groove, and the limit block is embedded in the slide groove.

[0010] Preferably, both side surfaces of the movable connecting plate are provided with strip grooves, the middle parts of the two groups of strip grooves are provided with tooth-shaped grooves, an adjustment groove is provided on one side of the bottom of the through groove, and a fixing plate is connected to the edge of the adjusting groove by screws, and a limited lifting mechanism is arranged on the top of the fixing plate, and the limited lifting mechanism is arranged inside the adjusting groove, and the limited lifting mechanism includes a fixed cylinder, a telescopic column and a No. 2 spring, a telescopic column is embedded in the top inner wall of the fixed cylinder, and the bottom end of the telescopic column is connected to the No. 2 spring, and the end of the No. 2 spring away from the telescopic column is connected to the bottom inner wall of the fixed cylinder.

[0011] 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 columns, and the tops of the two groups of fixed limiting columns extend into the through slot and are respectively embedded in the middle of the strip slots on both sides, and a mounting groove is provided at the top center of the connecting piece, and a movable block is movably connected to one side of the middle of the mounting groove through a rotating shaft, and a No. 3 spring is connected to the inner wall of one side of the mounting groove, and the end of the No. 3 spring is connected to the movable block, and a movable limiting column is connected to one side of the top of the movable block, and the top of the movable limiting column extends into the through slot and is embedded in the toothed groove.

[0012] Preferably, a magnetic block is embedded in the outer wall of one side of the movable block, an electromagnet is embedded in the inner wall of the mounting groove close to the magnetic block, an independent power supply is embedded in the bottom side of the fixed plate, and the independent power supply is electrically connected to the electromagnet.

[0013] Preferably, a button switch is provided on one side of the independent power supply, and the 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, and the controller and the button switch are also electrically connected.

[0014] Preferably, a pull rod is connected to the center of the bottom end of the connecting plate, and the end of the pull rod away from the connecting plate passes through the fixed plate and is connected to a pull block, and both sides of the outer wall of the end of the movable connecting plate away from the rotating connection mechanism are connected to window breaking drill bits.

[0015] Preferably, a No. 4 spring is connected to the end of the inner wall of one side of the strip groove, and one end of the No. 4 spring is connected to a buffer block. 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.

[0016] Preferably, a groove is provided on the outer wall of one side of the bottom of the mounting frame, seat mounting holes are arranged on the surface of the groove, 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 frame, a flip cover is connected to the upper part of the outer wall of the card plate by a hinge, and the flip cover covers the dressing mirror.

[0017] Preferably, the adjustment method comprises the following steps:

[0018] Step 1: First, connect the mounting frame to the car seat through the seat mounting holes with bolts. After the bolts are connected, insert the clamping plate into the groove for clamping. The clamping plate hides the connecting bolts between the mounting frame and the car seat while allowing the rear passengers to lift the flip cover to display the dressing mirror, making it convenient for the rear passengers to look in the mirror and put on makeup.

[0019] Step 2: The angle of the seat headrest is fixed to a certain extent by the engagement between the No. 2 tooth and the No. 1 tooth. When the angle of the seat headrest needs to be adjusted, the seat headrest can be directly moved to change the angle. When the seat headrest rotates, the headrest mounting frame is driven to rotate synchronously. The rotation of the headrest mounting frame drives the rotating cylinder and the No. 1 tooth to rotate synchronously. The rotation of the No. 1 tooth pushes the No. 2 tooth to contract, thereby realizing the rotation of the seat headrest. After rotating to the specified position, the movable cylinder and the No. 2 tooth are pushed by the No. 1 spring to re-engage with the No. 1 tooth, thereby realizing the fixation of the seat headrest after the angle adjustment;

[0020] Step 3: If you need to change the flexibility of the seat headrest adjustment angle, you can use a tool such as a screwdriver to rotate the nut. The rotation of the nut drives the rotation of the hinge shaft. The rotation of the hinge shaft changes the positional relationship between the nut and the hinge shaft, thereby changing the degree of compression of the No. 1 spring and thus changing the flexibility of the seat headrest adjustment angle.

[0021] Step 4: When the position of the seat headrest needs to be changed, the seat headrest can be pulled to drive the movable connecting plate to be pulled out, so that the movable connecting plate can be translated in the through slot. After being pulled to the required position, the movable block and the movable limiting column are pushed to move by the No. 3 spring, so that the movable limiting column and the toothed slot are engaged. When the movable connecting plate needs to be extended into the through slot, the button switch can be pressed to enable the independent power supply to power the electromagnet. The electromagnet is energized to generate an adsorption force to adsorb the magnetic block, thereby driving the movable block and the movable limiting column to move so that the movable limiting column is separated from the toothed slot end, thereby facilitating its contraction and adjustment.

[0022] Step 5: By pulling the pull block, the pull rod and the connecting piece can be driven to move horizontally downward. The movement of the connecting piece drives the fixed limit column and the movable limit column to move horizontally downward, so that the fixed limit column and the movable limit column are respectively moved out of the strip groove and the tooth groove, so that there is no limit connection between the movable connecting plate and the through groove. The movable connecting plate can be separated from the mounting frame by pulling the seat headrest, so as to facilitate the replacement of different types of seat headrests. At the same time, in case of emergency, the movable connecting plate can be pulled out, and the window can be broken by the window-breaking drill bit at the end of the movable connecting plate, so that when an accident occurs and the door cannot be opened, the window can be quickly broken to escape.

[0023] The technical effects and advantages of this application are:

[0024] 1. Compared with the prior art, this car seat headrest with adjustable front and rear rotation angle and its adjustment method fixes the angle of the seat headrest to a certain extent by engaging the second tooth with the first tooth. When the seat headrest needs to be adjusted, the seat headrest can be directly moved to change the angle. When the seat headrest rotates, it drives the headrest mounting frame to rotate synchronously. The rotation of the headrest mounting frame drives the rotating cylinder and the first tooth to rotate synchronously. The rotation of the first tooth pushes the second tooth to contract, thereby realizing the rotation of the seat headrest. After rotating to the specified position, the movable cylinder and the second tooth are pushed by the first spring to engage with the first tooth again, thereby realizing the fixation of the seat headrest after angle adjustment. The seat headrest can be rotated and adjusted to different gear angles through the rotating connection mechanism, thereby improving the comfort of the seat headrest.

[0025] 2. Compared with the existing technology, this car seat headrest with adjustable front and rear rotation angles and its adjustment method can pull the seat headrest when the position of the seat headrest needs to be changed, thereby driving the movable connecting plate to be pulled out, so that the movable connecting plate can be translated in the through groove. After being pulled to the required position, the movable block and the movable limiting column are pushed to move by the No. 3 spring, so that the movable limiting column and the toothed groove are clamped and fixed to achieve adjustment to different positions.

[0026] 3. Compared with the prior art, this car seat headrest with adjustable front and rear rotation angle and its adjustment method can transmit a signal to a controller via a signal receiving module when an in-vehicle sensor detects a car accident. The controller controls a button switch to energize the electromagnet with an independent power supply. The energization of the electromagnet pulls the magnetic block for adsorption, thereby driving the movable block and the movable limit post to move, causing the movable limit post to separate from the tooth groove end of the tooth groove, making the movable connecting plate movable. During a car accident, when the passenger's head hits the seat headrest, the seat headrest's soft material provides primary cushioning. The seat headrest then pushes the movable connecting plate to move into the through 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 the fixed limit post, the No. 4 spring can absorb kinetic energy to achieve secondary cushioning. At the same time, the proximity of the buffer block to the strip groove generates damping during movement. The damping generated by friction can offset the rebound after the No. 4 spring buffers. The double cushioning can protect the passenger's head as much as possible and reduce the impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of this application.

[0028] Figure 2 This is a schematic diagram of the overall structure of this application;

[0029] Figure 3 This is a schematic diagram of the connection structure between the fixing plate and the connecting piece of this application;

[0030] Figure 4 This is a schematic diagram of the front structure of this application;

[0031] Figure 5 This is a schematic diagram of the rotary connection mechanism structure of this application;

[0032] Figure 6 This is a schematic diagram of the connection structure between the card board and the flip cover of this application;

[0033] Figure 7 This is a schematic diagram of the structure of the interior of the adjustment slot and the limit lifting mechanism of this application;

[0034] Figure 8 This is a schematic diagram of the connecting piece structure of this application.

[0035] The accompanying drawings are marked as follows: 1. mounting bracket; 2. through slot; 3. movable connecting plate; 4. rotating connecting mechanism; 401. hinge shaft; 402. rotating cylinder; 403. tooth No. 1; 404. movable cylinder; 405. tooth No. 2; 406. spring No. 1; 407. nut; 408. nut; 409. connecting cylinder; 410. limit block; 411. slide; 5. headrest mounting bracket; 6. seat headrest; 9. adjustment slot; 10. fixing plate; 11. limit jack Mechanism; 111, fixed cylinder; 112, telescopic column; 113, No. 2 spring; 12, connecting piece; 13, fixed limit column; 14, mounting groove; 15, movable block; 16, No. 3 spring; 17, movable limit column; 18, magnetic block; 19, electromagnet; 20, independent power supply; 21, push button switch; 22, controller; 221, signal receiving module; 28, groove; 29, seat mounting hole; 30, card plate; 31, dressing mirror; 32, flip cover. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] Example 1

[0038] As attached Figures 1 to 8 The headrest of a car seat with adjustable front and rear rotation angle shown in the figure includes a mounting frame 1, 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 through slot 2, and the end of the movable connecting plate 3 away from the mounting frame 1 is connected to the headrest mounting frame 5 via a rotating connection mechanism 4. The end of the headrest mounting frame 5 away from the rotating connection mechanism 4 is connected to the seat headrest 6 via bolts. The rotating connection mechanism 4 includes a hinge shaft 401, a rotating cylinder 402, a first tooth 403, a movable cylinder 404 and a second tooth 405, the middle outer wall of the hinge shaft 401 is connected to 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. The outer walls of both ends of the rotating cylinder 402 are provided with first teeth 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 the two sets of movable cylinders 404 near the rotating cylinder 402 are provided with second teeth 405. The second teeth 405 are engaged with the first teeth 403.

[0039] Among them, the mounting frame 1 plays the role of installing and connecting the car seat, the connecting plate 3 can perform translational movement inside the through groove 2 to adjust the position of the seat headrest 6, the rotating cylinder 402 can rotate in the middle of the hinge shaft 401, and is connected to the headrest mounting frame 5 through the rotating cylinder 402 so that the headrest mounting frame 5 and the seat headrest 6 rotate synchronously, and the position of the rotating cylinder 402 is limited by the engagement between the No. 2 tooth 405 and the No. 1 tooth 403 to prevent the seat headrest 6 from rotating at will. The seat headrest 6 can be rotated and adjusted to different gear angles through the rotating connection mechanism 4, thereby improving the comfort of the seat headrest 6.

[0040] Example 2

[0041] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working methods. Figures 1 to 8 As shown, see the following description for details:

[0042] As a preferred embodiment, the rotating connection mechanism 4 also includes a No. 1 spring 406, a nut 407, a nut 408, a connecting tube 409, a limit block 410 and a slide groove 411. The movable tube 404 is provided with a No. 1 spring 406 at one end away from the rotating tube 402, and a nut 407 is provided at one end of the hinge shaft 401. The outer wall of the end of the hinge shaft 401 away from the nut 407 is threadedly connected with a nut 408. The ends of the two groups of No. 1 springs 406 away from the movable tube 404 are respectively abutted against the nut 407 and the nut 408. The outer walls of the two groups of movable tubes 404 are both sleeved with connecting tubes 409. The outer walls of one side of the two groups of connecting tubes 409 are connected to the movable connecting plate 3. The inner wall of the connecting tube 409 matches the nut 408. The outer wall of one side of the movable tube 404 is connected to the limit block 410, and the inner wall of one side of the connecting tube 409 is provided with a slide groove 411. The positioning block 410 is embedded in the slide groove 411, wherein the movable cylinder 404 is pushed toward the rotating cylinder 402 by the No. 1 spring 406, so that the No. 2 tooth 405 and the No. 1 tooth 403 maintain an engaged state. The nut 407 can be driven to rotate by a tool. The rotation of the nut 407 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 squeezing degree of the No. 1 spring 406 and changing the flexibility of the seat headrest 6 in adjusting the angle. The connecting cylinder 409 plays the role of connecting 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 consistent with that of the connecting cylinder 409, thereby preventing the rotating cylinder 402 from driving the movable cylinder 404 to rotate synchronously during the rotation process.

[0043] As a preferred embodiment, both side surfaces of the movable connecting plate 3 are provided with strip grooves, the middle part of the two groups of strip grooves is provided with a toothed groove, the bottom side of the through groove 2 is provided with an adjustment groove 9, the edge of the adjustment groove 9 is connected to a fixing plate 10 by a screw, and a limited lifting mechanism 11 is arranged on the top of the fixing plate 10. The limited lifting mechanism 11 is arranged inside the adjusting groove 9, and the limited lifting mechanism 11 includes a fixed cylinder 111, a telescopic column 112 and a No. 2 spring 113. The top inner wall of the fixed cylinder 111 is embedded with a telescopic column 112, and the bottom end of the telescopic column 112 is connected to the No. 2 spring 113. The end of the No. 2 spring 113 away from the telescopic column 112 is connected to the bottom inner wall of the fixed cylinder 111. In the embodiment, the strip groove and the tooth-shaped groove play a role of limiting connection, the strip groove can cooperate with the fixed limiting column 13 to guide and limit the movement of the movable connecting plate 3, and the tooth-shaped groove can cooperate with the movable limiting column 17 to position and fix the movable connecting plate 3 to achieve adjustment of different positions, and the fixed plate 10 plays a fixing role and can be fixedly connected to the mounting frame 1, and the fixed plate 10 and the connecting piece 12 can be connected and limited by the limiting lifting mechanism 11. At the same time, the No. 2 spring 113 plays a supporting and lifting role so that the connecting piece 12 is in contact with the top of the adjustment groove 9 without external interference, so that the fixed limiting column 13 and the movable limiting column 17 can limit the connection of the movable connecting plate 3.

[0044] As a preferred embodiment, 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 to the through slot 2 and are respectively embedded in the middle of the strip grooves on both sides. A mounting groove 14 is provided at the top center of the connecting piece 12, and 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, and 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, and the top of the movable limiting column 17 extends to the through slot 2 It is embedded in the tooth-shaped groove, wherein the mounting groove 14 plays the role of limiting the movable block 15. The movable block 15 can be rotated in the mounting groove 14 through the movable shaft. Under the push of the No. 3 spring 16, the movable limiting column 17 can always be engaged with the tooth groove of the tooth-shaped groove, thereby limiting and fixing it. 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 groove 2. After being pulled to the required position, the movable block 15 and the movable limiting column 17 are pushed to move by the No. 3 spring 16, so that they are engaged with the tooth-shaped groove through the movable limiting column 17.

[0045] As a preferred embodiment, a magnetic block 18 is embedded in the outer wall of one side of the movable block 15, an electromagnet 19 is embedded in the inner wall of the mounting groove 14 near the magnetic block 18, and an independent power supply 20 is embedded in the bottom side of the fixed plate 10. The independent power supply 20 and the electromagnet 19 are electrically connected, wherein the magnetic block 18 can be adsorbed by the electromagnet 19, and the independent power supply 20 supplies power to the electromagnet 19 by pressing the button switch 21. The electromagnet 19 is energized to generate an adsorption force to adsorb the magnetic block 18, thereby driving the movable block 15 and the movable limit column 17 to move so that the movable limit column 17 is separated from the tooth groove end of the tooth groove, thereby facilitating its contraction and adjustment. At the same time, the independent power supply 20 is a battery, which can be replaced regularly or powered by an external power supply.

[0046] As a preferred embodiment, a button switch 21 is provided on one side of the independent power supply 20, and the 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 and the button switch 21 are also electrically connected. When the in-vehicle sensor detects a car accident, the signal can be transmitted to the controller 22 through the signal receiving module 221. The controller 22 controls the button switch 21 so that the independent power supply 20 energizes the electromagnet 19. The electromagnet 19 is energized to pull the magnetic block 18 for adsorption, thereby driving the movable block 15 and the movable limit column 17 to move so that the movable limit column 17 moves. The positioning column 17 is separated from the tooth groove end, so that the movable connecting plate 3 is 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 is used for primary buffering, and then the seat headrest 6 pushes the movable connecting plate 3 to move inside the through groove. The movement of the movable connecting plate 3 drives the movement of the strip groove. When the buffer block on one side of the strip groove abuts against the fixed limit column 13, the No. 4 spring can absorb kinetic energy to achieve secondary buffering. At the same time, the buffer block is close to the strip groove, so that damping is generated during the movement. The damping generated by friction can offset the rebound after the No. 4 spring buffering. Through two bufferings, the passenger's head can be protected as much as possible and the impact is reduced.

[0047] As a preferred embodiment, a pull rod is connected to the center of the bottom end of the connecting piece 12, and the end of the pull rod away from the connecting piece 12 passes through the fixed plate 10 and is connected to a pull block, and both sides of the outer wall of the end of the movable connecting plate 3 away from the rotating connection mechanism 4 are connected to a window-breaking drill bit, wherein, by pulling the pull block, the pull rod and the connecting piece 12 can be driven to move downward in translation, and the connecting piece 12 moves in translation, thereby driving the fixed limit column 13 and the movable limit column 17 to move downward in translation, so that the fixed limit column 13 and the movable limit column 17 are respectively moved out of the strip groove and the tooth groove, so that there is no limit connection between the movable connecting plate 3 and the through groove 2, and the seat headrest 6 can be pulled to separate the movable connecting plate 3 from the mounting frame 1, so that the movable connecting plate 3 can be pulled out in an emergency, and the car window can be broken by the window-breaking drill bit at the end of the movable connecting plate 3, so that when the car door cannot be opened in an accident, the window can be quickly broken and escaped.

[0048] As a preferred embodiment, a No. 4 spring is connected to the end of the inner wall of one side of the strip groove, and one end of the No. 4 spring is connected to a buffer block. The outer wall of the buffer block is close to the inner wall of the strip groove. The buffer block is made of rubber. The No. 4 spring can absorb kinetic energy to achieve buffering. At the same time, the buffer block is close to the strip groove so that damping is generated during the movement. The damping generated by friction can offset the impact of the rebound after the No. 4 spring buffers.

[0049] As a preferred embodiment, a groove 28 is provided on the outer wall of one side of the bottom of the mounting frame 1, and 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, and 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 flip cover 32 is connected to the upper part of the outer wall of the card plate 30 by a hinge, and the flip cover 32 covers the dressing mirror 31. The seat mounting holes 29 are used to cooperate with bolts to connect the mounting frame 1 to the car seat and install it. The connecting bolts between the mounting frame 1 and the car seat are hidden by the card plate 30, and the rear passengers can lift the flip cover 32 to display the dressing mirror 31, which is convenient for the rear passengers to look in the mirror and put on makeup.

[0050] The adjustment method includes the following steps:

[0051] Step 1: First, connect the mounting frame 1 to the car seat through the seat mounting hole 29 with bolts. After the bolt connection, insert the clamping plate 30 into the groove 28 for clamping. The clamping plate 30 hides the connecting bolts between the mounting frame 1 and the car seat. At the same time, the rear passengers can open the flip cover 32 to display the dressing mirror 31, which is convenient for the rear passengers to look in the mirror and put on makeup.

[0052] Step 2: The angle of the seat headrest 6 is fixed to a certain extent by the engagement between the second tooth 405 and 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 the specified position, the movable cylinder 404 and the second tooth 405 are pushed by the first spring 406 to re-engage with the first tooth 403, thereby realizing the fixation of the seat headrest 6 after the angle adjustment;

[0053] Step 3: When the flexibility of the seat headrest 6 needs to be changed, the nut 407 can be rotated by using a tool such as a screwdriver. The rotation of the nut 407 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 No. 1 spring 406 and thus changing the flexibility of the seat headrest 6.

[0054] 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 required 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 is engaged with the toothed slot. When the movable connecting plate 3 needs to be extended into the through slot 2, the button switch 21 can be pressed to enable the independent power supply 20 to power the electromagnet 19. The electromagnet 19 is energized to generate an adsorption force to adsorb the magnetic block 18, 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, thereby facilitating its contraction and adjustment.

[0055] Step 5: By pulling the pull block, the pull rod and the connecting piece 12 can be driven to move horizontally downward. The movement of the connecting piece 12 drives the fixed limit column 13 and the movable limit column 17 to move horizontally downward, so that the fixed limit column 13 and the movable limit column 17 are respectively moved out of the strip groove and the tooth groove, so that there is no limit 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 an emergency, the movable connecting plate 3 can be pulled out, and the window can be broken by the window-breaking drill bit 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.

[0056] The working process of this application is as follows: first, the mounting frame 1 is connected to the car seat through the seat mounting hole 29 by bolts, and after the bolt connection, the clamping plate 30 is embedded in the groove 28 for clamping. The connecting bolts between the mounting frame 1 and the car seat are hidden by the clamping plate 30. At the same time, the rear passengers can open the flip cover 32 to display the dressing mirror 31, which is convenient for the rear passengers to look in the mirror and put on makeup. When the seat headrest 6 needs to be adjusted in angle, the seat headrest 6 can be directly turned to change the angle. When the seat headrest 6 rotates, the headrest mounting frame 5 is driven to rotate synchronously, and the rotation of the headrest mounting frame 5 drives the rotating cylinder 402 rotates synchronously with the No. 1 tooth 403, and the No. 1 tooth 403 rotates to push the No. 2 tooth 405 to contract, thereby realizing the rotation of the seat headrest 6. After rotating to the specified position, the No. 1 spring 406 pushes the movable cylinder 404 and the No. 2 tooth 405 to re-engage with the No. 1 tooth 403, thereby realizing the fixation of the seat headrest 6 after the angle adjustment. 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. After being pulled to the required position, the No. 3 spring 16 pushes the movable block 15 and the movable limiting column 17 to move, thereby engaging with the toothed groove through the movable limiting column 17;

[0057] By pulling the pull block, the pull rod and the connecting piece 12 can be driven to move horizontally downward. The movement of the connecting piece 12 drives the fixed limit column 13 and the movable limit column 17 to move horizontally downward, so that the fixed limit column 13 and the movable limit column 17 are respectively moved out of the strip groove and the tooth groove, so that there is no limit 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 bracket 1, so as to facilitate the replacement of different types of seat headrests 6. At the same time, in an emergency, the movable connecting plate 3 can be pulled out, and the window can be broken by the window-breaking drill bit 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. When the sensor in the car detects a car accident, the signal can be transmitted to the controller 22 through the signal receiving module 221. The controller 22 controls the button switch 21 so that the independent power supply 20 can couple the electromagnet 19 is energized, and the electromagnet 19 is energized to pull the magnetic block 18 for adsorption, 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 tooth groove end of the tooth groove, so that the movable connecting plate 3 is 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 is used for primary buffering, and then the seat headrest 6 pushes the movable connecting plate 3 to move inside the through groove. The movement of the movable connecting plate 3 drives the strip groove to move. When the buffer block on one side of the strip groove abuts against the fixed limiting column 13, the No. 4 spring can absorb kinetic energy to achieve secondary buffering. At the same time, the buffer block is close to the strip groove, so that damping is generated during the movement. The damping generated by friction can offset the rebound after the No. 4 spring buffering. Through two bufferings, the passenger's head can be protected as much as possible and the impact is reduced.

Claims

1. A car seat headrest with adjustable front and rear rotation angles, 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), and a movable connecting plate (3) is embedded in the interior of the through slot (2). The end of the movable connecting plate (3) away from the mounting frame (1) is connected to the headrest mounting frame (5) through a rotating connecting mechanism (4). The end of the headrest mounting frame (5) away from the rotating connecting mechanism (4) is connected to the seat headrest (6) through a bolt. The rotating connecting mechanism (4) includes a hinge shaft (401), a rotating cylinder (402), a first tooth (403), a movable cylinder (404) and a second tooth (405). The outer wall of the middle part of the hinge shaft (401) is connected to the rotating cylinder (402) through a bearing. The outer wall of one end of the rotating cylinder (402) is connected to the headrest mounting frame (5). The outer walls of both ends of the rotating cylinder (402) are provided with a first tooth (403), and both sides of the rotating cylinder (402) are provided with a movable cylinder (404), and the two groups of movable cylinders (404) are sleeved on the outer wall of the hinge shaft (401), and the two groups of movable cylinders (404) are provided with a second tooth (405) at one end close to the rotating cylinder (402), and the second tooth (405) and the first tooth (403) are engaged with each other. The surfaces of both sides of the movable connecting plate (3) are provided with a strip groove, and the middle of the two groups of strip grooves are provided with a tooth groove. The bottom side of the through groove (2) is provided with an adjustment groove (9), and the edge of the adjustment groove (9) is connected to a fixing plate (10) by screws, and the top of the fixing plate (10) is arranged with a screw. A limited lifting mechanism (11) is provided in the row, and the limited lifting mechanism (11) is provided inside the adjustment groove (9). The limited lifting mechanism (11) includes 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 a telescopic column (112), 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). 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), and the tops of the two groups of fixed limiting columns (13) are extended. The connecting piece (12) is respectively embedded in the middle of the strip grooves on both sides in the through groove (2), and a mounting groove (14) is provided at the top center 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), and 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 to the through groove (2) and is embedded in the tooth groove. A magnetic block (18) is embedded on one side of the outer wall of the movable block (15). An electromagnet (19) is embedded on the inner wall of one side of the mounting groove (14) close to the magnetic block (18).An independent power supply (20) is embedded on one side of the bottom of the fixed plate (10), and the independent power supply (20) is electrically connected to the electromagnet (19). A button switch (21) is provided on one side of the independent power supply (20), and the button switch (21) is electrically connected to the independent power supply (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). The controller (22) and the button switch (21) are also electrically connected. A pull rod is connected to the center of the bottom end of the connecting piece (12), and the end of the pull rod away from the connecting piece (12) passes through the fixed plate (10) and is connected to a pull block. 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 a window-breaking drill bit. A No. 4 spring is connected to the end of the inner wall of one side of the strip groove, and one end of the No. 4 spring is connected to a buffer block. 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. , 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 cylinder (409), a limit block (410) and a slide groove (411), wherein the end of the movable cylinder (404) away from the rotating cylinder (402) is provided with a No. 1 spring (406), one end of the hinge shaft (401) is provided with a nut (407), and the outer wall of the end of the hinge shaft (401) away from the nut (407) is threadedly connected with a nut (408), and two groups of the No. 1 springs (406) away from the movable cylinder (404) are provided. ) 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 a connecting cylinder (409), one side outer wall 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 the limiting block (410), one side inner wall of the connecting cylinder (409) is provided with a slide groove (411), and the limiting block (410) is embedded in the slide groove (411).

3. The car seat headrest with adjustable front and rear rotation angle according to claim 1, characterized in that: A groove (28) is provided on the outer wall of one side of the bottom of the mounting frame (1), and 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), and 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 flip cover (32) is connected to the outer wall of the card plate (30) via a hinge, and the flip cover (32) covers the dressing mirror (31).

4. A method for adjusting a front-to-back angle-adjustable automobile seat headrest, using the front-to-back angle-adjustable automobile seat headrest according to any one of claims 1 to 3, characterized in that: The adjustment method comprises the following steps: Step 1: First, the mounting frame (1) is connected to the car seat through the seat mounting hole (29) by bolts, 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 screwdriver. The rotation of the nut (407) 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 No. 1 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 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, thereby facilitating its contraction adjustment. Step 5: By pulling the pull block, the pull rod and the connecting piece (12) can be driven to move in a translation downward. The translation of the connecting piece (12) drives the fixed limiting column (13) and the movable limiting column (17) to move in a translation downward, so that the fixed limiting column (13) and the movable limiting column (17) are respectively moved out of the strip groove and the tooth groove, 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 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.

Images