A delay flip structure and a car headrest

Abstract

The application discloses a delay turnover structure and an automobile headrest. The delay turnover structure comprises an unlocking rope, a limiting component, a support frame and a rotating frame. The support frame is elastically rotatably installed at the top end of the rotating frame. The limiting component is arranged in the support frame and cooperates with the top end of the rotating frame to lock the support frame. The first end of the unlocking rope is fixedly arranged and eccentrically arranged with the rotating center of the bottom end of the rotating frame. The second end of the unlocking rope is connected with the limiting component. The automobile headrest comprises the delay turnover structure. The application has the beneficial effects that: the headrest installed on the support frame can be automatically turned over through the mechanical cooperation of the limiting component and the unlocking component, the delay turnover of the headrest can make the folding more safe, no additional driving device is needed, the cost is reduced, and the reliability is improved.

Description

Technical Field

[0001] This application relates to the field of automotive headrest technology, and in particular to a delayed flip structure and an automotive headrest. Background Technology

[0002] A car headrest is a driving comfort feature and a safety protection device. In the event of a rear-end collision, the human body will fall backward due to inertia. At this time, the pressure from the vehicle's acceleration or deceleration is concentrated on the vulnerable neck and head, and the headrest acts as a buffer to protect the head.

[0003] In some rear seats of a car, such as the third-row seats, it is often necessary to fold them down to save space or facilitate passenger access. For example... Figure 2 As shown, in order to further improve space utilization, the headrests on the seats also need to be foldable. Existing headrest folding methods generally fall into two categories: manual folding, which is cumbersome; and electric folding, which uses sensors and drive devices, but is more expensive. Therefore, how to further improve the existing headrest folding methods is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] One of the objectives of this application is to provide a delayed flip structure.

[0005] Another objective of this application is to provide an automotive headrest with a delayed flip structure.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a delayed flipping structure, including an unlocking rope, a limiting component, a support frame, and a rotating frame. The support frame is elastically rotatably mounted on the top of the rotating frame. The limiting component is disposed inside the support frame and cooperates with the top of the rotating frame to lock the support frame. The first end of the unlocking rope is fixedly disposed and eccentrically disposed with respect to the rotation center at the bottom of the rotating frame. The second end of the unlocking rope is connected to the limiting component. When the rotating frame rotates along the bottom end by a set angle, the unlocking rope is adapted to drive the limiting component to release the lock on the support frame, thereby causing the support frame to flip under the action of elasticity.

[0007] Preferably, a mounting bracket is fixedly connected to the top of the rotating frame, and the support frame is elastically rotatably mounted on the mounting bracket. A fixing ring is sleeved on the outside of the mounting bracket, and the fixing ring extends radially upward and bends to form a locking part. The limiting component includes a limiting ring, which is elastically rotatably mounted inside the support frame and corresponds to and is parallel to the fixing ring. The limiting ring extends radially and bends to form a locking groove. The second end of the unlocking rope passes through the inside of the support frame and is connected to the outside of the limiting ring. When the locking groove is adapted to cooperate with the locking part under the action of elastic force, the support frame is in a locked state. When the locking part rotates under the drive of the unlocking rope until it separates from the locking groove, the support frame is in an unlocked state.

[0008] Preferably, the limiting component further includes a limiting frame, which is elastically rotatably mounted in the support frame at its bottom end and perpendicular to the limiting ring. The limiting ring extends radially away from the locking groove to form a protrusion. The second end of the unlocking rope is connected to the top end of the limiting frame, and one side of the bottom end of the limiting frame abuts against the protrusion.

[0009] Preferably, the limiting component further includes a limiting plate, which is elastically rotatably mounted on the side of the support frame via a first end; the unlocking rope is connected to the top of the limiting frame and its second end passes through the support frame and is connected to the second end of the limiting plate; a guide ring is installed on the side of the support frame and is sleeved on the outside of the unlocking rope; when the support frame is in the unlocked state, the limiting plate is adapted to engage with the guide ring under the drive of the unlocking rope.

[0010] Preferably, the fixing ring extends radially downward to form a limiting portion; when the support frame abuts against the first end of the limiting portion, the support frame is in an unfolded state; when the support frame abuts against the second end of the limiting portion, the support frame is in a folded storage state.

[0011] A car headrest includes a seat base, a seat back, a headrest body, and the aforementioned delayed flip structure. A fixed shaft is fixedly installed on the rear side of the seat base, a rotating frame is rotatably mounted on the fixed shaft, the seat back is mounted on the rotating frame, a fixing strip is fixedly installed on the outside of the fixed shaft, and the headrest body is mounted on a support frame. A first end of an unlocking rope is connected to the end of the fixing strip, thereby achieving an eccentric setting between the first end of the unlocking rope and the rotation center of the bottom end of the rotating frame. A second end of the unlocking rope is connected to a limiting component. When the seat back is in an unfolded state, the unlocking rope is in a slack state; when the seat back is folded, the unlocking rope is adapted to tighten and act on the limiting component, thereby releasing the lock on the support frame.

[0012] Preferably, the car headrest further includes a drive mechanism, a traction rope, and a roller. The roller is rotatably sleeved on the outside of a fixed shaft. The first end of the traction rope is connected to the inside of the roller, and the second end of the traction rope is connected to the support frame. A guide sleeve that cooperates with the traction rope is installed on the outside of the mounting frame. The input end of the drive mechanism is connected to the seat back, and the output end of the drive mechanism is connected to the roller. When the seat back is folded, the drive mechanism is adapted to drive the roller to rotate in a first direction, thereby releasing the traction rope. When the seat back is unfolded, the drive mechanism is adapted to drive the roller to rotate in a second direction, thereby retracting the traction rope and unfolding the support frame.

[0013] Preferably, the driving mechanism includes a gear ring, a gear set, and a cylinder. The cylinder is rotatably mounted on the seat base plate at its first end and coaxially arranged with the fixed shaft. The second end of the cylinder is connected to the roller. The gear ring is fixedly mounted on the seat back and coaxially arranged with the fixed shaft. The gear ring is installed inside the seat back. The gear set is mounted on the seat base plate. The gear ring and the cylinder are connected by the gear set. When the seat back rotates, the gear ring is adapted to drive the roller to rotate through the gear set.

[0014] Preferably, the gear set includes a first gear, a second gear, and a third gear. The first gear is rotatably mounted on the seat base plate via a rotating shaft and meshes with the gear ring. The second gear is sleeved on the outside of the cylinder. The third gear is mounted on the rotating shaft and meshes with the second gear.

[0015] Preferably, the gear set includes a first gear and a second gear. The first gear is rotatably mounted on the seat base plate via a rotating shaft and meshes with the gear ring. The second gear is sleeved on the outside of the cylinder and meshes with the first gear.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] This invention achieves automatic flipping of the headrest mounted on the support frame by setting a limit component and an unlocking component in a mechanical structure. The delayed flipping of the headrest makes folding safer and eliminates the need for an additional drive device, thus reducing costs and improving reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2This is a schematic diagram illustrating the principle of the seat folding in this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the seat back of this utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of the seat after disassembly.

[0022] Figure 5 This is a schematic diagram of the overall mechanism for folding and unfolding the drive headrest of this utility model.

[0023] Figure 6 For the present utility model Figure 5 A schematic diagram of a local structure.

[0024] Figure 7 This is a schematic diagram of the internal structure of the support frame of this utility model.

[0025] Figure 8 This is a schematic diagram illustrating the working principle of the unlocking rope when the seat back of this utility model rotates.

[0026] Figure 9 This is a schematic diagram of the support frame of this utility model when it is unlocked.

[0027] Figure 10 This is a schematic diagram of the bottom structure of the support frame of this utility model.

[0028] Figure 11 This is a schematic diagram showing the two extreme states of the support frame rotation of this utility model.

[0029] Figure 12 This is a schematic diagram of the overall driving mechanism of this utility model.

[0030] Figure 13 This is an exploded structural diagram of the drive mechanism of this utility model.

[0031] Figure 14 This is a schematic diagram of the first embodiment of the gear set of this utility model.

[0032] Figure 15 This is a schematic diagram of the second embodiment of the gear set of this utility model.

[0033] Figure 16 This is a schematic diagram of the internal structure of the seat of this utility model when it is folded.

[0034] Figure 17 This is a schematic diagram illustrating the working principle of each component of the seat after it is unfolded according to this utility model.

[0035] In the diagram: 1. Seat base; 101. Mounting seat; 2. Seat backrest; 3. Headrest body; 4. Mounting bracket; 401. Support rod; 402. Crossbar; 5. Unlocking component; 501. Unlocking rope; 6. Drive mechanism; 601. Gear ring; 602. Gear set; 6021. First gear; 6022. Second gear; 6023. Third gear; 603. Cylinder; 7. Fixed shaft; 8. Traction rope; 9. Support frame; 10. Fixing strip; 11. Roller; 12. Limiting assembly; 1201. Limiting ring; 1202. Limiting frame; 1203. Limiting piece; 13. Guide sleeve; 14. Fixing ring; 15. Locking groove; 16. Protrusion; 17. Locking part; 18. Limiting part; 19. Flexible sleeve; 20. Bearing seat; 21. Fixing frame. Detailed Implementation

[0036] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0038] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] Further analysis of the problems encountered by existing car seat headrests in actual use:

[0040] In some seven-seater or larger vehicles, the rear seats need to be folded down in certain situations to save space or facilitate passenger access. For example... Figure 2As shown, the folding process involves two steps: Step I involves rotating and folding the seat back 2 towards the seat base 1; Step II involves rotating and folding the headrest body 3 on the seat back 2 downwards. This completes the folding and storage of the entire seat. Currently, the folding of the headrest body 3 is typically done manually, which is time-consuming, labor-intensive, and cumbersome. Another method is automatic folding, generally used in intelligent high-end cars. In this method, both the seat back 2 and the headrest body 3 use a drive device (such as a motor) for automated folding control. However, the headrest body 3 itself has a small internal volume, so installing a drive control system results in poor heat dissipation, high cost, and complex structure, making it unsuitable for widespread use.

[0041] Therefore, the inventors of this application have developed a delayed flip structure, one embodiment of which is, for example... Figures 1 to 17 As shown, it includes an unlocking component 5 (i.e., unlocking rope 501), a limiting component 12, a support frame 9, and a rotating frame. The support frame 9 is elastically mounted on the top of the rotating frame via a torsion spring. The limiting component 12 is disposed inside the support frame 9 and cooperates with the top of the rotating frame to lock the support frame 9. The first end (bottom end) of the unlocking rope 501 is fixedly disposed and eccentrically disposed with respect to the rotation center of the bottom end of the rotating frame. The second end (top end) of the unlocking rope 501 is connected to the limiting component 12.

[0042] It should be noted that since this flipping structure is mainly used in car headrests, the following specific embodiment will be described using a car headrest as an example: the seat back 2 is mounted on a rotating frame, or the seat back 2 can be considered equivalent to the rotating frame; the rotating frame is mounted on the seat base 1 by rotating its bottom end, and the bottom end of the unlocking rope 501 is located inside the seat base 1 (i.e., a fixed design); the headrest body 3 is mounted on the support frame 9. It can be understood that when the rotating frame rotates at a set angle along its bottom end, because the bottom end of the unlocking rope 501 is eccentrically positioned with respect to the rotating frame, the unlocking rope 501 will be tightened during rotation. This unlocking rope 501 then drives the limiting component 12 to release the lock on the support frame 9, at which point the support frame 9 flips and folds under the action of elasticity. Of course, this delayed flipping structure can be applied not only to car seats but also to seats in any other scenario.

[0043] Specifically, when the seat backrest 2 is in the unfolded state (i.e., the seat is in use), the limiting component 12 locks and limits the support frame 9, thus keeping the support frame 9 in the unfolded state (i.e., the headrest body 3 is in use), and the torsion spring on the support frame 9 is in a deformed and energy-storing state. When the seat backrest 2 is folded, after rotating the seat backrest 2 along the seat base plate 1 by a set angle, the unlocking component 5 will release the locking component 12 from the support frame 9, and the support frame 9 will fold and retract under the elastic force of the (torsion spring).

[0044] It can be seen that the automatic folding and flipping function of the support frame 9 can be realized through the mechanical structure of the limiting component 12 and the unlocking component 5. This not only simplifies the structure but also eliminates the need for an additional driving device, reducing costs and improving reliability.

[0045] As a further description of the above embodiments: as Figure 3 As shown, mounting seats 101 are installed on both sides of the rear end of the seat base 1. A fixing shaft 7 is fixedly installed between the two mounting seats 101, and the seat back 2 is rotatably mounted outside the fixing shaft 7. A fixing strip 10 is fixedly installed outside the fixing shaft 7. The first end (bottom end) of the unlocking rope 501 is connected to the end of the fixing strip 10, and the second end (top end) of the unlocking rope 501 is connected to the limiting component 12, thereby achieving an eccentric setting between the bottom end of the unlocking rope 501 and the rotating frame.

[0046] The following describes the principle by which the unlocking rope 501 triggers the limit component 12: Figure 8 As shown, when the seat back 2 is in the unfolded state, the unlocking rope 501 is in a slack state. When the seat back 2 rotates clockwise, that is, when the seat back 2 rotates around the axis of the fixed shaft 7, the bottom end of the unlocking rope 501 is located to the left of the axis of the fixed shaft 7 (i.e., the two are eccentrically set). When the seat back 2 rotates, the unlocking rope 501 will gradually tighten. When a certain angle is reached, the tightened unlocking rope 501 will generate tension and trigger the limiting component 12, thereby releasing the lock on the support frame 9.

[0047] It should be noted that, as Figure 8 As shown, we can set the rotation angle of the seat back 2 as β, and the specific angle of β can be set by those skilled in the art according to the actual situation. For example, β is seventy degrees, that is, after the seat back 2 rotates seventy degrees, the limiting component 12 can be triggered to release the lock on the support frame 9; of course, this angle can also be the limit angle after the seat back 2 is folded, that is, after the seat back 2 is folded and retracted onto the seat base 1, the support frame 9 is just unlocked and automatically folds under the action of the elastic force.

[0048] It should be further explained why the seat rotation is delayed after it has rotated to a certain angle. This is because if the headrest were unlocked at the initial stage of the seat backrest 2 rotation, the headrest body 3 would be folded under elastic force, resulting in a sudden and significant return force, which would generate a large impact and compromise safety. Furthermore, since the unlocking rope 501 gradually tightens as the seat backrest 501 rotates, it is also prone to breaking.

[0049] In one embodiment of this application, such as Figure 5 and Figure 6 As shown, the mounting bracket 4 includes a crossbar 402 and a pair of support rods 401. The support rods 401 are symmetrically mounted at the top of the seat back 2, while the crossbar 402 is fixedly mounted at the top of the two support rods 401. The support frame 9 is rotatably mounted on the outside of the crossbar 402. A retaining ring 14 is fixedly sleeved on the outside of the crossbar 402, as shown. Figure 7 As shown, the fixing ring 14 extends radially upward and bends to form a locking portion 17. The limiting assembly 12 includes a limiting ring 1201, which can be elastically rotatably mounted in the support frame 9 by a torsion spring. The limiting ring 1201 corresponds to and is parallel to the fixing ring 14. The limiting ring 1201 extends radially downward and bends to form a locking groove 15. The top end of the unlocking rope 501 passes through the inside of the support frame 9 and is connected to the outside of the limiting ring 1201.

[0050] Understandably, when the locking groove 15 engages with the locking part 17 under the elastic force of the torsion spring, i.e., the locking part 17 and the locking groove 15 are engaged, thereby restricting the rotation of the support frame 9. At this time, the support frame 9 is in an unfolded, locked, and limited state. However, when the seat back 2 is rotated and folded, the unlocking rope 501 will exert a pulling force on the limiting ring 1201, causing the limiting ring 1201 to rotate until the locking part 17 separates from the locking groove 15, as shown below. Figure 9 As shown, the support frame 9 will be in the unlocked state at this time, and will then automatically fold under the action of elasticity. Of course, during the automatic folding process of the support frame 9, a certain pulling force will also be generated on the unlocking rope 501, that is, the unlocking rope 501 will drive the locking part 17 to rotate further away from the locking groove 15, so that the unlocking rope 501 will not cause interference during the folding process of the support frame 9.

[0051] It is worth mentioning that the above-described embodiment can also be modified as follows: the support frame 9 still uses a torsion spring for elastic rotation, and the support frame 9 is also limited by elastic force during normal use. At this time, the top end of the unlocking rope 501 is connected to the support frame 9, while the bottom end of the unlocking rope 501 remains unchanged (or a similar installation method, so that the unlocking rope 501 generates a pulling force when the seat back 2 rotates); the limiting component 12 is omitted here. Its working principle is as follows: when the seat back 2 rotates and folds, the unlocking rope 501 generates a pulling force, which in turn pulls and folds the unfolded support frame 9. That is, as the seat back 2 gradually rotates and folds, the taut unlocking rope 501 also gradually pulls the support frame 9 to rotate and fold; and when the seat back 2 unfolds, the unlocking rope 501 gradually loosens, at which point the support frame 9 gradually returns to its original position under the action of elastic force.

[0052] It should be noted that although the structure in the modified embodiment described above is simpler and can still achieve the function of automatic folding and resetting of the support frame 9, it has the following disadvantages: ① The unlocking rope 501 needs to withstand greater force. During the folding process of the support frame 9, the unlocking rope 501 needs to overcome the elastic force of the torsion spring; and when in the folded state, the unlocking rope 501 is always under tension, and maintaining this state for a long time will greatly reduce the service life of the unlocking rope 501. ② The unlocking rope 501 needs a larger stroke, such as... Figure 8 As shown, it should be understood that the greater the distance between the bottom end of the unlocking rope 501 and the left side of the axis of the fixed shaft 7, the greater the relative displacement generated by the second end of the unlocking rope 501 when the seat back 2 rotates. Therefore, directly driving the rotation and folding of the support frame 9 through the unlocking rope 501 may require a long fixing strip 10, which in turn requires more installation space inside the lower end of the seat back 2. However, with the design of the limiting component 12 in this case, the unlocking rope 501 only plays a triggering role and does not need to bear a large force, resulting in a long service life. Moreover, the stroke of the unlocking rope 501 is relatively small, which can save installation space inside the lower end of the seat back 2 and improve space utilization.

[0053] In one embodiment of this application, such as Figure 7 As shown, the limiting assembly 12 also includes a limiting frame 1202. The limiting frame 1202 is rotatably mounted in the support frame 9 and is perpendicular to the limiting ring 1201. The limiting frame 1202 can also be elastically connected to the support frame 9 by a torsion spring. The limiting ring 1201 extends radially away from the locking groove 15 to form a protrusion 16. The second end of the unlocking rope 501 is connected to the top end of the limiting frame 1202. One side of the bottom end of the limiting frame 1202 abuts against the protrusion 16.

[0054] Understandably, when the seat back 2 is rotated and folded, the unlocking rope 501 exerts a pulling force on the top of the limiting bracket 1202, causing the limiting bracket 1202 to rotate along its bottom. This causes the bottom of the limiting bracket 1202 to press against the protrusion 16 of the limiting ring 1201, driving the limiting ring 1201 to rotate and unlock the headrest. It should be noted that the limiting bracket 1202 drives the limiting ring 1201 to unlock because: Figures 5 to 7 As shown, the unlocking rope 501 passes through the support rod 401 and then enters the support frame 9 from the side. The limiting frame 1202 is parallel to the side of the support frame 9. Therefore, the unlocking rope 501 needs to enter through the side hole of the support frame 9 and connect with the limiting frame 1202 below. At this time, the unlocking rope 501 will bend significantly, resulting in greater friction. On the other hand, we know that the front and back thickness of the support frame 9 is definitely less than its left and right or up and down length. The unlocking rope 501 pulling the limiting frame 1202 to rotate can be similar to the lever principle. That is, the farther the connection between the unlocking rope 501 and the limiting frame 1202 is from the rotation center of the limiting frame 1202, the less effort is required. However, the front and back distance inside the support frame 9 is limited, so it is not suitable to set the length of the limiting ring 1201 to be long enough. Therefore, a longer limiting frame 1202 can be set in the left, right, up, and down space within the support frame 9 to transmit the force, thereby reducing the force on the unlocking rope 501 when the support frame 9 is unlocked. At the same time, after the unlocking rope 501 passes through the support frame 9 and connects with the limiting frame 1202, it is in an approximately horizontal state, which further reduces the bending state of the unlocking rope 501, avoids excessive friction and wear inside the support frame 9, and improves the durability and reliability of the overall structure.

[0055] Further optimization, such as Figure 6 As shown, the limiting assembly 12 also includes a limiting piece 1203. The limiting piece 1203 is elastically rotatably mounted on the side of the support frame 9 via a first end. Specifically, a pin is rotatably mounted inside the support frame 9 via a torsion spring. The pin extends to the side of the support frame 9 and connects to the first end of the limiting piece 1203, thereby forming an elastically rotatable mounting of the limiting piece 1203. The unlocking rope 501 is connected to the top of the limiting frame 1202, and its second end passes through the support frame 9 and connects to the second end of the limiting piece 1203. A guide ring is installed on the side of the support frame 9, and the guide ring is sleeved on the outside of the unlocking rope 501.

[0056] It is understandable that at this point, the second end of the unlocking rope 501 has two connection points, namely, the second end of the unlocking rope 501 is connected to both the limiting frame 1202 and the limiting piece 1203. This has the following advantages: ① It improves the stability of the connection at the second end of the unlocking rope 501; on the other hand, even if the connection point with the limiting piece 1203 detaches, normal use can still be guaranteed; even if the connection point with the limiting frame 1202 detaches, meaning the headrest body 3 cannot be used normally, the second end of the unlocking rope 501 will still be located in the headrest position, preventing the entire unlocking rope 501 from detaching and retracting into the seat back 2. This facilitates later maintenance, as only the headrest area needs to be removed. It should be noted that the detachment mentioned above does not refer to the breakage of the unlocking rope 501, but rather the detachment of the connection point. ② The abutting fit between the limiting plate 1203 and the guide ring can limit the maximum rotation angle of the limiting frame 1202. That is, when the limiting plate 1203 abuts against the guide ring, the limiting frame 1202 rotates to its maximum angle. This can prevent the limiting frame 1202 from rotating excessively, thereby preventing the limiting ring 1201 from rotating excessively and causing it to collide or be damaged with the fixed ring 14. ③ Since both the limiting plate 1203 and the limiting frame 1202 are installed elastically by torsion springs, both will reset under the action of elastic force when the unlocking rope 501 is loosened. The design of the limiting plate 1203 provides a guarantee for the reset of the limiting frame 1202. For example, if the torsion spring on the limiting frame 1202 fails, the elastic force of the limiting plate 1203 can still perform the reset function.

[0057] Further optimization, such as Figure 9 As shown, the retaining ring 14 extends radially downward to form a limiting portion 18. It can be understood that, as... Figure 10 and Figure 11 As shown in (a), when the support frame 9 rotates and abuts against the first end (i.e., the left end) of the limiting part 18, the support frame 9 is in the unfolded state. Figure 11 As shown in (b), when the support frame 9 rotates and abuts against the second end (right end) of the limiting part 18, the support frame 9 is in a folded and stored state. In other words, the design of the limiting part 18 limits the maximum angle of rotation of the support frame 9 in both directions, thereby preventing the support frame 9 from overturning or being damaged during rotation, and improving the stability and safety of the overall structure.

[0058] Based on the above embodiments, the following problem exists during use: After the seat back 2 is folded at a certain angle, the headrest body 3 can automatically fold under the action of elasticity. However, after the seat back 2 is unfolded, the headrest body 3 needs to be manually reset, such as... Figure 7As shown, the support frame 9 needs to be rotated until the locking part 17 and the locking groove 15 are engaged again to lock the headrest body 3, which is somewhat cumbersome and inconvenient.

[0059] Therefore, in order to solve the above-mentioned technical problems, another aspect of this application provides an automotive headrest, specifically including the aforementioned delayed flipping structure, and further including a drive mechanism 6, a traction rope 8, and a roller 11. The roller 11 is rotatably sleeved and installed outside the fixed shaft 7. The first end of the traction rope 8 is connected inside the roller 11, and the second end of the traction rope 8 is connected to the support frame 9. A guide sleeve 13 that cooperates with the traction rope 8 is installed on the outside of the mounting frame 4. The input end of the drive mechanism 6 is connected to the seat back 2, and the output end of the drive mechanism 6 is connected to the roller 11, that is, the drive mechanism 6 is installed between the seat back 2 and the seat base 1.

[0060] Understandably, when the seat backrest 2 is rotated and folded, it acts on the drive mechanism 6, which in turn drives the roller 11 to rotate in the first direction (clockwise). This releases the traction rope 8, preventing interference with the subsequent folding of the headrest. When the headrest is fully folded, the traction rope 8 is at its maximum extension. When the seat backrest 2 is rotated and unfolded, the drive mechanism 6, under the influence of the seat backrest 2, drives the roller 11 to rotate in the second direction (counterclockwise). This retracts the traction rope 8, which in turn pulls the support frame 9 to unfold, thus enabling the headrest body 3 to automatically unfold after the seat backrest 2 is unfolded.

[0061] This application does not specifically limit the structure of the drive mechanism 6, but the following specific embodiment is provided for reference:

[0062] like Figure 12 As shown in (c) and (d), the drive mechanism 6 includes a gear ring 601, a gear set 602, and a cylinder 603. A bearing seat 20 is fixedly installed at the mounting base 101 of the seat base 1. The first end of the cylinder 603 is installed in the bearing seat 20 and is coaxially arranged with the fixed shaft 7. The second end of the cylinder 603 is connected to the roller 11. The gear ring 601 is fixedly installed in the seat back 2 and is also coaxially arranged with the fixed shaft 7. The gear set 602 is installed on the mounting base 101, and the gear ring 601 and the cylinder 603 are connected by the gear set 602.

[0063] It is understandable that when the seat back 2 is unfolded or folded, the seat back 2 will rotate along the axis of the fixed shaft 7, and the gear ring 601 will also rotate synchronously. The gear ring 601 acts on the gear set 602, the gear set 602 acts on the cylinder 603 to rotate, and the cylinder 603 will drive the roller 11 to take in or release the rope.

[0064] The gear set 602 has various structural forms, including but not limited to the following two:

[0065] Structure 1: such as Figure 14 As shown, the gear set 602 includes a first gear 6021, a second gear 6022 and a third gear 6023. The first gear 6021 is rotatably mounted on the mounting seat 101 of the seat base plate 1 via a rotating shaft, and the first gear 6021 meshes with the inside of the gear ring 601. The second gear 6022 is fixedly sleeved and mounted on the outside of the cylinder 603. The third gear 6023 is mounted on the rotating shaft and meshes with the second gear 6022.

[0066] It is understandable that when the seat back 2 drives the gear ring 601 to rotate, the gear ring 601 acts on the first gear 6021 to rotate, the first gear 6021 drives the third gear 6023 to rotate synchronously through the rotating shaft, the third gear 6023 drives the second gear 6022 to rotate, the second gear 6022 drives the cylinder 603 to rotate, thereby realizing the rotation of the roller body 11.

[0067] Structure 2: such as Figure 15 As shown, the gear set 602 includes a first gear 6021 and a second gear 6022. The first gear 6021 is rotatably mounted on the mounting seat 101 of the seat base plate 1 via a rotating shaft, and the first gear 6021 meshes with the inside of the gear ring 601. The second gear 6022 is fixedly sleeved on the outside of the cylinder 603, and the second gear 6022 meshes with the first gear 6021.

[0068] It is understandable that when the seat back 2 drives the gear ring 601 to rotate, the gear ring 601 acts on the first gear 6021 to rotate, the first gear 6021 acts on the second gear 6022 to rotate, and the second gear 6022 drives the cylinder 603 to rotate, thereby realizing the rotation of the roller body 11.

[0069] It should be known that, as Figure 2As shown, the rotation angle of the seat back 2 when folded is not very large, and the connection point between the traction rope 8 and the support frame 9, as well as the stroke of the traction rope 8, need to be considered so that the traction rope 8 can drive the support frame 9 to rotate and reset smoothly and with little effort. Therefore, it is necessary to ensure that the stroke of the traction rope 8 is sufficient. The design of the gear set 602 can enlarge the number of rotations of the roller 11, thereby enabling the traction rope 8 to meet the actual retraction and unfolding requirements. As for Structure 1 and Structure 2, since Structure 1 uses an additional gear design compared to Structure 2, under the same enlargement ratio, the overall structure of the gear ring 601 and gear set 602 used in Structure 1 can be smaller, which can ensure the compact installation of the device within the seat back 2; while Structure 2 has a simpler structure. Therefore, both structures can meet the actual needs, and those skilled in the art can choose according to the actual situation.

[0070] It is worth mentioning that after the seat back 2 is rotated and opened, the headrest body 3 will also automatically unfold under the action of the traction rope 8. The unfolded headrest body 3 will be locked under the action of the limit ring 1201. The headrest body 3 will also be locked under the action of the tightened traction rope 8, thus playing a double limiting role and improving the stability and safety of the headrest body 3 after unfolding.

[0071] like Figure 13 As shown, the gear set 602 can be designed in multiple sets, which are evenly distributed along the circumference of the fixed shaft 7. For ease of installation, as... Figure 13 As shown, a pair of spaced-apart, annular mounting brackets 21 are bolted to the mounting base 101 of the seat base 1. A corresponding gear is rotatably mounted between the two mounting brackets 21 via a rotating shaft. This is to improve the stability of the entire drive mechanism 6 and the smoothness of the driving force transmission, ensuring that the drive mechanism 6 can stably and smoothly drive the roller 11 to wind or unwind the rope during the rotation of the seat back 2. Of course, while ensuring smooth transmission, cost considerations also apply. Figure 14 and Figure 15 As shown, the gear set 602 can also be a single set. Since the rotation angle of the seat back 2 is limited, its rotation is only about a quarter turn. Therefore, the number of teeth inside the gear ring 601 can be set to be missing teeth. For example, half of the gear ring 601 is toothed, and the other half is a smooth design. This can reduce the processing steps of the gear ring 601, thereby further reducing costs.

[0072] In this embodiment, as Figure 7 and Figure 10As shown, to further reduce wear caused by hard compression between components, flexible sleeves 19 are provided at the mating parts of the limiting frame 1202 and the protrusion 16, the parts where the limiting frame 1202 mates with the support frame 9, and the parts where the support frame 9 mates with the limiting part 18. The flexible sleeves 19 not only effectively reduce wear between components and improve the overall structural durability, but also reduce noise generated by component friction to a certain extent, enhancing the user experience. Furthermore, the flexible sleeves 19 are preferably made of wear-resistant and elastic materials, such as rubber or silicone, to ensure they maintain good performance during use.

[0073] The working principle of this utility model is as follows:

[0074] ①For example Figure 1 As shown, this is the fully unfolded state of the seat, that is, both the seat back 2 and the headrest body 3 are unfolded.

[0075] ②For example Figure 2 As shown, the seat is folded, that is, the seat back 2 is rotated and folded towards the seat base 1; as shown Figure 8 As shown, during the folding of the seat back 2, the unlocking rope 501 is also gradually tightened. When the seat back 2 is folded to its limit position or close to its limit position, as... Figure 7 As shown, at this time, the unlocking rope 501 will pull the limiting frame 1202 to rotate, and then the bottom end of the limiting frame 1202 will press against the protrusion 16, so that the limiting ring 1201 will rotate, and the locking groove 15 and the locking part 17 will separate (as shown). Figure 9 As shown), this releases the lock on the support frame 9, which then folds automatically under the elastic force of the torsion spring. Of course, during the rotation and folding process of the seat back 2, as... Figure 12 As shown, the gear ring 601 rotates around the axis of the fixed shaft 7. The gear ring 601 acts on the gear set 602, the gear set 602 acts on the cylinder 603, and the cylinder 603 drives the roller 11 to rotate and loosens the traction rope 8. This is also to prepare for the subsequent folding of the support frame 9.

[0076] ③ Unfold the seats, such as Figure 17 As indicated by the arrow, the seat back 2 rotates and unfolds away from the seat base 1. Conversely, the gear ring 601 drives the roller 11 to reverse direction via the gear set 602, thereby tightening the traction rope 8, causing the folded headrest body 3 to gradually unfold. When the seat base 1 rotates to the fully unfolded position, the headrest body 3 is also in the fully unfolded position under the action of the traction rope 8. Of course, during the rotation and unfolding process of the seat back 2, as... Figure 8As shown, at this time, the unlocking rope 501 will also change from a taut to a slack state, and then the limiting ring 1201, the limiting bracket 1202, and the limiting piece 1203 will rotate and reset under the action of elasticity, as shown. Figure 7 As shown, the locking groove 15 and the locking part 17 will cooperate again to lock the support frame 9, thereby completing the automatic unfolding process of the headrest after the seat is unfolded.

[0077] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A delayed flip structure, characterized in that, include: The system includes an unlocking rope, a limiting component, a support frame, and a rotating frame. The support frame is elastically rotatably mounted on the top of the rotating frame. The limiting component is disposed inside the support frame and cooperates with the top of the rotating frame to lock the support frame. The first end of the unlocking rope is fixedly disposed and eccentrically disposed with respect to the rotation center at the bottom of the rotating frame. The second end of the unlocking rope is connected to the limiting component. When the rotating frame rotates at a set angle along its bottom end, the unlocking rope is adapted to drive the limiting component to release the lock on the support frame, and then the support frame flips under the action of elasticity.

2. The delayed flip structure as described in claim 1, characterized in that: The rotating frame is fixedly connected to the top of the mounting frame, the support frame is elastically rotatably mounted on the mounting frame, and a fixing ring is sleeved on the outside of the mounting frame. The fixing ring extends radially upward and bends to form a locking part. The limiting component includes a limiting ring, which is elastically rotatably mounted inside the support frame and is parallel to the fixing ring. The limiting ring extends radially and bends to form a locking groove. The second end of the unlocking rope passes through the inside of the support frame and is connected to the outside of the limiting ring. When the locking groove is adapted to engage with the locking part under the action of elasticity, the support frame is in a locked state; when the locking part rotates under the drive of the unlocking rope until it separates from the locking groove, the support frame is in an unlocked state.

3. The delayed flip structure as described in claim 2, characterized in that: The limiting component also includes a limiting frame, which is elastically rotatably mounted in the support frame at its bottom end and perpendicular to the limiting ring. The limiting ring extends radially away from the locking groove to form a protrusion. The second end of the unlocking rope is connected to the top end of the limiting frame, and one side of the bottom end of the limiting frame abuts against the protrusion.

4. The delayed flip structure as described in claim 3, characterized in that: The limiting assembly further includes a limiting plate, which is elastically rotatably mounted on the side of the support frame via a first end; the unlocking rope is connected to the top of the limiting frame and its second end passes through the support frame and is connected to the second end of the limiting plate; a guide ring is installed on the side of the support frame and is sleeved on the outside of the unlocking rope; when the support frame is in the unlocked state, the limiting plate is adapted to engage with the guide ring under the drive of the unlocking rope.

5. The delayed flip structure as described in claim 4, characterized in that: The fixing ring extends radially downward to form a limiting part; when the support frame abuts against the first end of the limiting part, the support frame is in an unfolded state; when the support frame abuts against the second end of the limiting part, the support frame is in a folded storage state.

6. A car headrest, characterized in that: The device includes a seat base, a seat back, a headrest body, and a delayed flipping structure as described in any one of claims 1-5. A fixed shaft is fixedly mounted on the rear side of the seat base, a rotating frame is rotatably mounted on the fixed shaft, the seat back is mounted on the rotating frame, a fixing strip is fixedly mounted on the outside of the fixed shaft, and the headrest body is mounted on the support frame. The first end of the unlocking rope is connected to the end of the fixing strip, thereby achieving an eccentric setting between the first end of the unlocking rope and the rotation center of the bottom end of the rotating frame. The second end of the unlocking rope is connected to the limiting component. When the seat back is in the unfolded state, the unlocking rope is in a slack state; when the seat back is folded, the unlocking rope is adapted to tighten and act on the limiting component, thereby releasing the lock on the support frame.

7. The car headrest as described in claim 6, characterized in that: The car headrest also includes a drive mechanism, a traction rope, and a roller. The roller is rotatably mounted on the outside of a fixed shaft. The first end of the traction rope is connected to the inside of the roller, and the second end of the traction rope is connected to the support frame. A guide sleeve that cooperates with the traction rope is installed on the outside of the mounting frame. The input end of the drive mechanism is connected to the seat back, and the output end of the drive mechanism is connected to the roller. When the seat back is folded, the drive mechanism is adapted to drive the roller to rotate in a first direction, thereby releasing the traction rope; when the seat back is unfolded, the drive mechanism is adapted to drive the roller to rotate in a second direction, thereby retracting the traction rope and unfolding the support frame.

8. The car headrest as described in claim 7, characterized in that: The driving mechanism includes a gear ring, a gear set, and a cylinder. The cylinder is rotatably mounted on the seat base plate at its first end and coaxially arranged with the fixed shaft. The second end of the cylinder is connected to the roller. The gear ring is fixedly mounted on the seat back and coaxially arranged with the fixed shaft. The gear ring is installed inside the seat back. The gear set is mounted on the seat base plate. The gear ring and the cylinder are connected by the gear set. When the seat back rotates, the gear ring is adapted to drive the roller to rotate through the gear set.

9. The car headrest as described in claim 8, characterized in that: The gear set includes a first gear, a second gear, and a third gear. The first gear is rotatably mounted on the seat base plate via a rotating shaft and meshes with the gear ring. The second gear is sleeved on the outside of the cylinder. The third gear is mounted on the rotating shaft and meshes with the second gear.

10. The car headrest as described in claim 8, characterized in that: The gear set includes a first gear and a second gear. The first gear is rotatably mounted on the seat base plate via a rotating shaft and meshes with the gear ring. The second gear is sleeved on the outside of the cylinder and meshes with the first gear.

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