Headrest adjustment mechanism and seat

Abstract

The present invention provides a headrest adjustment mechanism and a seat, and relates to the technical field of seats. The headrest adjustment mechanism provided by the present invention includes: a mounting frame, a headrest, a driving member, and a limiting member; the headrest is movably connected to the mounting frame; the mounting frame is provided with a plurality of latching positions adapted to the limiting member, and the plurality of latching positions are spaced apart along the movable track of the headrest; the limiting member is provided with a locking portion, and the limiting member is movably connected to the headrest; the driving member is in transmission connection with the limiting member, so that the headrest adjustment mechanism has a locked state and an unlocked state; in the locked state, the limiting member is engaged with any latching position, and the locking portion engages with the driving member to restrict the movement of the limiting member; in the unlocked state, the locking portion is disengaged from the driving member, and the driving member drives the limiting member to move, so that the limiting member is disengaged from the latching position. In the locked state, the driving member can prevent the limiting member from loosening, thereby preventing the headrest position from loosening due to external collisions, thereby improving the stability of the headrest.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a headrest adjustment mechanism and a seat. Background Art

[0002] To accommodate passengers of varying heights, seat headrests typically require adjustable height and a lockable stopper. In child safety seats, the headrest's installation height directly impacts the safety of the child. If the stopper shifts during a collision, the headrest can become loose, causing a deviation in the headrest's installation height and compromising the seat's safety performance. Summary of the Invention

[0003] The object of the present invention is to provide a headrest adjustment mechanism and a seat, so as to alleviate the technical problem in the prior art that an external collision may cause the headrest position locking to fail.

[0004] In a first aspect, the present invention provides a headrest adjustment mechanism comprising: a mounting frame, a headrest, a driving member, and a limiting member;

[0005] The headrest is movably connected to the mounting frame;

[0006] The mounting frame is provided with a plurality of latching positions adapted to the position-limiting member, and the plurality of latching positions are arranged at intervals along the movable track of the headrest;

[0007] The limiting member is provided with a locking portion, and the limiting member is movably connected to the headrest, and the driving member is transmission-connected to the limiting member so that the headrest adjustment mechanism has a locked state and an unlocked state;

[0008] In the locked state, the limiting member is engaged with any of the locking positions, and the locking portion is engaged with the driving member to limit the movement of the limiting member;

[0009] In the unlocked state, the locking portion is disengaged from the driving member, and the driving member drives the limiting member to move, so that the limiting member is disengaged from the locking position.

[0010] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein an elastic device is connected between the driving member and the limiting member;

[0011] The elastic device is used to make the limiting member tend to be locked in the locking position and to reset the driving member, so that the headrest adjustment mechanism has a tendency to switch from the unlocked state to the locked state.

[0012] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the limiting member is hinged to the headrest, and the limiting member is provided with a blocking portion adapted to the blocking position;

[0013] In the locked state, the blocking portion is engaged with the locking position;

[0014] In the unlocked state, the blocking portion is disengaged from the blocking position.

[0015] In combination with the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein a first inclined surface is provided at the bottom of the blocking portion, and the first inclined surface is inclined from bottom to top toward the mounting bracket;

[0016] When the headrest is pressed downward, the headrest drives the limiting member, and the first inclined surface abuts against the locking position, so that the blocking portion moves in a direction away from the locking position.

[0017] In combination with the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the limiting member is provided with a second inclined surface, and the second inclined surface faces the driving member;

[0018] And / or, the driving member is provided with a third inclined surface, and the third inclined surface faces the limiting member;

[0019] The second inclined surface and the third inclined surface are inclined from bottom to top in an unlocking direction away from the limiting member.

[0020] In combination with the fourth possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein, in the locked state, there is an idle travel gap between the driving member and the limiting member;

[0021] The idle travel gap is located between the second inclined surface and the driving member, or the idle travel gap is located between the third inclined surface and the limiting member, or the idle travel gap is located between the second inclined surface and the third inclined surface.

[0022] In combination with the fifth possible implementation manner of the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein, during the process of switching from the locked state to the unlocked state, the idle travel gap gradually decreases;

[0023] When the idle travel gap is shrunk to be closed, the locking portion is separated from the driving member.

[0024] In combination with the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the driving member includes: a handle ring, a drawstring and a release slider, the drawstring is connected between the handle ring and the release slider, and the release slider is slidably connected to the headrest.

[0025] In combination with the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein the mounting frame is provided with a slide groove, and the slide groove extends from bottom to top;

[0026] A plurality of the latching positions are arranged at intervals along the slide groove;

[0027] The limiting member slides inside the sliding groove.

[0028] In a second aspect, the present invention provides a seat equipped with the headrest adjustment mechanism described in the first aspect.

[0029] The embodiments of the present invention provide the following beneficial effects: a headrest is movably connected to a mounting frame, the mounting frame being provided with a plurality of latching positions adapted to engage with a retaining member, the plurality of latching positions being spaced apart along the movable trajectory of the headrest; a retaining member having a locking portion and being movably connected to the headrest; a driving member being in transmission connection with the retaining member, such that the headrest adjustment mechanism has a locked state and an unlocked state. In the locked state, the retaining member engages with any latching position, and the locking portion engages with the driving member, thereby restricting the movement of the retaining member; in the unlocked state, the locking portion disengages from the driving member, and the driving member drives the retaining member to move, disengaging the retaining member. In the locked state, the driving member prevents the retaining member from loosening, thereby preventing the headrest from loosening due to external collisions and improving the stability of the headrest.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 An exploded view of a headrest adjustment mechanism provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of a mounting frame for a headrest adjustment mechanism provided in an embodiment of the present invention;

[0034] Figure 3A partial cross-sectional view of a headrest adjustment mechanism in a locked state provided by an embodiment of the present invention;

[0035] Figure 4 A partial cross-sectional view of the headrest adjustment mechanism provided by an embodiment of the present invention when the locking portion is disengaged from the driving member;

[0036] Figure 5 A partial cross-sectional view of the headrest adjustment mechanism in the unlocked state provided by an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of a limiting member of a headrest adjustment mechanism provided in an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of a driving component of a headrest adjustment mechanism provided in an embodiment of the present invention.

[0039] Icons: 100-mounting frame; 101-locking position; 102-slide groove; 200-headrest; 300-driving member; 301-third inclined plane; 310-handle ring; 320-pull strap; 330-unlocking slider; 400-limiting member; 401-locking part; 402-blocking part; 421-first inclined plane; 403-second inclined plane; 500-elastic device. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the headrest adjustment mechanism provided by the embodiment of the present invention includes: a mounting frame 100, a headrest 200, a driving member 300 and a limiting member 400; the headrest 200 is movably connected to the mounting frame 100; a plurality of latching positions 101 adapted to the limiting member 400 are provided on the mounting frame 100, and the plurality of latching positions 101 are arranged at intervals along the movable track of the headrest 200; the limiting member 400 is provided with a locking portion 401, and the limiting member 400 is movably connected to the headrest 200, and the driving member 300 is transmission-connected to the limiting member 400, so that the headrest adjustment mechanism has a locked state and an unlocked state.

[0044] In the locked state, the limiting member 400 is engaged with any latching position 101 , and the locking portion 401 is engaged with the driving member 300 to limit the movement of the limiting member 400 .

[0045] In the unlocked state, the locking portion 401 is separated from the driving member 300 , and the driving member 300 drives the limiting member 400 to move, so that the limiting member 400 is separated from the locking position 101 .

[0046] In an optional embodiment, the driving member 300 may be configured as an electronically controlled power device, using an electric motor or a hydraulic telescopic cylinder to drive the movable member, which is connected to the limiting member 400 through a transmission connection.

[0047] In this embodiment, the driving member 300 is connected to the headrest 200 by sliding in a top-down direction. Under the action of gravity, the driving member 300 tends to descend. When the driving member 300 descends to the lowest point of the stroke, the driving member 300 drives the limiting member 400 to cooperate with any position 101 through pushing or connecting rod transmission, and the locking portion 401 cooperates with the driving member 300 through abutment or plugging. The driving member 300 limits the locking portion 401, and then the limiting member 400 is locked, thereby preventing external collision from causing the limiting member 400 to disengage from the position 101, which can ensure that the position of the headrest 200 is firmly locked.

[0048] In addition, in another optional embodiment, the driving member 300 can be slid along the mounting frame 100 or the headrest 200, and the driving member 300 has an interference fit with the slide, so that the driving member 300 can be fixed at any position of the slide, thereby achieving the locking of the headrest adjustment mechanism in a locked state or an unlocked state.

[0049] In this embodiment of the present invention, an elastic device 500 is connected between the driver 300 and the stopper 400. The elastic device 500 is used to force the stopper 400 to lock in the locking position 101 and reset the driver 300, thereby allowing the headrest adjustment mechanism to switch from the unlocked state to the locked state. The elastic device 500 can drive the stopper 400 to lock in any of the locking positions 101. The elastic device 500 can also return the driver 300 to its original position, thereby engaging the driver 300 with the locking portion 401, thereby ensuring that the stopper 400 is securely locked.

[0050] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the limiting member 400 is hinged to the headrest 200 , and the limiting member 400 is provided with a blocking portion 402 adapted to the blocking position 101 .

[0051] In the locked state, the block portion 402 is engaged with the locking position 101 ; in the unlocked state, the block portion 402 is disengaged from the locking position 101 .

[0052] Specifically, the latch 101 includes a limiting protrusion or a limiting slot. In the locked state, the blocking portion 402 abuts against the limiting protrusion or is inserted into the limiting slot, thereby stabilizing the position of the limiting member 400 relative to the mounting frame 100. When the limiting member 400 is installed on the headrest 200, the position of the headrest 200 relative to the mounting frame 100 is fixed.

[0053] It should be noted that the mounting bracket 100 can be configured as a bracket connected to the seat back, or the mounting bracket 100 can be configured as a seat back body, thereby allowing the headrest 200 to be directly mounted on the seat back.

[0054] Furthermore, a first inclined surface 421 is provided at the bottom of the block portion 402, and the first inclined surface 421 is inclined from bottom to top toward the direction of the mounting frame 100 (see Figure 6 ).

[0055] When the locking portion 401 disengages from the driving member 300 and an external force presses down the headrest 200, the headrest 200 drives the limiting member 400 to move downward, and the first inclined surface 421 abuts against the locking position 101. The reaction force acting on the first inclined surface 421 can drive the blocking portion 402 to disengage from the locking position 101, and the headrest 200 can be pressed to lower the installation position relative to the mounting frame 100.

[0056] like Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the limiting member 400 is provided with a second inclined surface 403 , which faces the driving member 300 ; alternatively, the driving member 300 is provided with a third inclined surface 301 , which faces the limiting member 400 .

[0057] The second inclined surface 403 and the third inclined surface 301 are inclined from bottom to top in an unlocking direction away from the limiting member 400. Figure 6 and Figure 7 The second inclined surface 403 and the third inclined surface 301 are inclined rightward from bottom to top. When the driving member 300 drives the limiting member 400 to unlock, the second inclined surface 403 abuts the driving member 300, or the third inclined surface 301 abuts the limiting member 400. The limiting member 400 receives the force from the driving member 300 and is driven to unlock, thereby releasing the limiting member 400 from the locking position 101.

[0058] In a preferred embodiment, the stopper 400 is provided with a second inclined surface 403, and the driver 300 is provided with a third inclined surface 301, with the second inclined surface 403 being arranged opposite the third inclined surface 301. When the driver 300 drives the stopper 400 to unlock, the second inclined surface 403 and the third inclined surface 301 come into contact and slide relative to each other, thereby driving the stopper 400 to unlock. This increases the contact area between the driver 300 and the stopper 400, preventing severe local wear and providing more stable transmission.

[0059] Furthermore, in the locked state, there is an idle travel gap between the driving member 300 and the limiting member 400 .

[0060] When the driving member 300 lacks the third inclined surface 301, an idle travel gap is formed between the second inclined surface 403 and the driving member 300. When the limiting member 400 lacks the second inclined surface 403, an idle travel gap is formed between the third inclined surface 301 and the limiting member 400. In a preferred embodiment, the limiting member 400 is provided with the second inclined surface 403, and the driving member 300 is provided with the third inclined surface 301, and an idle travel gap is formed between the second inclined surface 403 and the third inclined surface 301.

[0061] When the external force pulls the driving member 300, the driving member 300 will not push the limiting member 400 to swing due to the presence of an idle travel gap (see Figures 3 and 4 ).

[0062] During the process of switching from the locked state to the unlocked state, the idle travel gap gradually decreases; when the idle travel gap shrinks to close, the locking portion 401 disengages from the driving member 300 (see Figure 4). Then, the driving member 300 is continuously pulled, and the driving member 300 pushes the limiting member 400 to swing, thereby causing the limiting member 400 to disengage from the locking position 101 (see Figure 5 ), at this time, the headrest 200 can be raised and lowered relative to the mounting frame 100.

[0063] like Figure 1 and Figure 7 As shown, the driving member 300 includes a handle ring 310, a drawstring 320, and a release slider 330. The drawstring 320 is connected between the handle ring 310 and the release slider 330, and the release slider 330 is slidably connected to the headrest 200. The drawstring 320 is located between the mounting bracket 100 and the headrest 200. The third inclined surface 301 is provided on the release slider 330. The release slider 330 has a through slot, through which the limiter 400 passes. When locked, the locking portion 401 abuts against the release slider 330, thereby preventing the limiter 400 from being unlocked.

[0064] like Figure 1 、 Figure 2 and Figure 6 As shown, the mounting frame 100 is provided with a slide 102 extending upward from bottom to top; a plurality of latches 101 are spaced apart along the slide 102; and a stopper 400 slides within the slide 102. Multiple latches 101 are positioned on either side of the slide 102, facing each other. The two latching portions 402 on the stopper 400 engage with the latches 101 on either side of the slide 102, thereby locking the headrest 200 in position. During seat assembly, the headrest 200 is positioned on the side of the mounting frame 100 facing the seating area. The driver 300 is positioned between the mounting frame 100 and the headrest 200, and the driver 300 is pulled upward to switch the headrest adjustment mechanism from a locked state to an unlocked state. The limiting member 400 passes through the slide groove 102 from the seat side and is connected to the headrest 200; in the locked state, the locking portion 401 abuts against the front end surface of the driving member 300, thereby restricting the limiting member 400 from moving or swinging toward the rear of the seat, thereby restricting the limiting member 400 from being unlocked, preventing external collisions from causing the limiting member 400 to be unlocked, and preventing external collisions from causing the headrest 200 to become loose.

[0065] like Figure 1 As shown, the seat provided by the embodiment of the present invention is provided with the headrest adjustment mechanism described in the above embodiment.

[0066] In the embodiment of the present invention, the seat has the technical effect of the above-mentioned headrest adjustment mechanism, which will not be described in detail here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A headrest adjustment mechanism, characterized in that: include: A mounting frame (100), a headrest (200), a driving member (300), and a limiting member (400); The headrest (200) is movably connected to the mounting frame (100); The mounting frame (100) is provided with a plurality of latching positions (101) adapted to the position-limiting member (400), and the plurality of latching positions (101) are arranged at intervals along the moving track of the headrest (200); The limiting member (400) is provided with a locking portion (401), and the limiting member (400) is movably connected to the headrest (200), and the driving member (300) is transmission-connected to the limiting member (400), so that the headrest adjustment mechanism has a locked state and an unlocked state; In the locked state, the limiting member (400) is engaged with any of the locking positions (101), and the locking portion (401) is engaged with the driving member (300) to limit the movement of the limiting member (400); In the unlocked state, the locking portion (401) is disengaged from the driving member (300), and the driving member (300) drives the limiting member (400) to move so that the limiting member (400) is disengaged from the locking position (101); The limiting member (400) is hinged to the headrest (200), and the limiting member (400) is provided with a block portion (402) adapted to the locking position (101); in the locked state, the block portion (402) is engaged with the locking position (101); in the unlocked state, the block portion (402) is disengaged from the locking position (101); A first inclined surface (421) is provided at the bottom of the block portion (402), and the first inclined surface (421) is inclined from bottom to top in a direction close to the mounting frame (100); when the locking portion (401) is separated from the driving member (300) and an external force presses down the headrest (200), the headrest (200) drives the limiting member (400), and the first inclined surface (421) abuts against the blocking position (101), so that the block portion (402) moves in a direction of separating from the blocking position (101); The limiting member (400) is provided with a second inclined surface (403), and the driving member (300) is provided with a third inclined surface (301); In the locked state, there is an idle travel gap between the driving member (300) and the limiting member (400); The idle travel gap is located between the second inclined surface (403) and the driving member (300), or the idle travel gap is located between the third inclined surface (301) and the limiting member (400), or the idle travel gap is located between the second inclined surface (403) and the third inclined surface (301).

2. The headrest adjustment mechanism according to claim 1, characterized in that: An elastic component (500) is connected between the driving component (300) and the limiting component (400); The elastic device (500) is used to cause the limiting member (400) to tend to be locked at the locking position (101) and to reset the driving member (300), so that the headrest adjustment mechanism has a tendency to switch from the unlocked state to the locked state.

3. The headrest adjustment mechanism according to claim 1, characterized in that: The second inclined surface (403) faces the driving member (300); The third inclined surface (301) faces the limiting member (400); The second inclined surface (403) and the third inclined surface (301) are inclined from bottom to top in an unlocking direction away from the limiting member (400).

4. The headrest adjustment mechanism according to claim 3, characterized in that: During the process of switching from the locked state to the unlocked state, the idle travel gap gradually decreases; When the idle travel gap shrinks to be closed, the locking portion (401) is separated from the driving member (300).

5. The headrest adjustment mechanism according to claim 1, characterized in that: The driving member (300) comprises a handle ring (310), a drawstring (320) and a lock-releasing slider (330), wherein the drawstring (320) is connected between the handle ring (310) and the lock-releasing slider (330), and the lock-releasing slider (330) is slidably connected to the headrest (200).

6. The headrest adjustment mechanism according to claim 1, characterized in that: The mounting frame (100) is provided with a slide groove (102), and the slide groove (102) extends from bottom to top; A plurality of the latching positions (101) are arranged at intervals along the slide groove (102); The limiting member (400) slides inside the sliding groove (102).

7. A seat, characterized in that: The seat is provided with a headrest adjustment mechanism according to any one of claims 1 to 6.

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