Headrest assembly and seat

Abstract

The present application discloses a headrest assembly and a seat. The headrest assembly comprises: a first bracket; a mounting bracket slidably connected to the first bracket; a headrest connected to the mounting bracket; and a first locking structure, comprising a first sliding seat, a first clamping member and a second clamping member, wherein the first sliding seat is slidably arranged on one of the first bracket and the mounting bracket, the second clamping member is arranged on the other one of the first bracket and the mounting bracket, the first clamping member is movably arranged on the first sliding seat and is in linkage connection with the first sliding seat, and the second clamping member is arranged opposite to the first clamping member. The first sliding seat slides to drive the first clamping member to move towards the second clamping member to form a clamping fit with the second clamping member so as to lock the mounting bracket, or drive the first clamping member to move away from the second clamping member to cancel the clamping fit with the second clamping member so as to unlock the mounting bracket. In the headrest assembly of the present application, the position of the headrest is adjusted and locked by means of the provided first locking structure, the adjustment operation is simple and convenient, and the structural stability is good.

Description

Headrest assembly and seat

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202423228057.5, filed on December 24, 2024, entitled "Headrest Assembly and Seat", and Chinese Patent Application No. 202423249951.0, filed on December 26, 2024, entitled "Headrest Assembly and Seat", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of seating technology, and in particular to a headrest assembly and a seat. Background Technology

[0004] Chairs are commonly seen in offices, study rooms, and other similar spaces, meeting people's needs for sitting while working, studying, or resting. Generally, a chair consists of a base, backrest, seat cushion, and headrest. When using a chair, the head and / or neck can naturally rest on the headrest, which provides support for the head and neck.

[0005] In related technologies, the headrests of seats have position adjustment functions and are equipped with a locking structure that can lock their position. However, the locking structure is complex, inconvenient to adjust, and lacks stability, which affects the user experience.

[0006] Furthermore, in the related technology of the seat, the headrest assembly has a height adjustment function. When adjusted to the required height, it is positioned by the engagement of the buckle structure and the slot, so that the headrest is at the required height.

[0007] To facilitate headrest height adjustment, the adjustment force is typically set to be small. For example, when adjusting the headrest, users can easily disengage the latch mechanism from the slot by manipulating the headrest and the sliding rod connected to it, thus adjusting the height. However, because of this, when leaning back against the headrest, the force applied can easily cause the sliding rod to slide the headrest down, resulting in headrest displacement. This affects support for the user's head and / or neck, leading to a poor user experience. Summary of the Invention

[0008] According to the first aspect of this application, a headrest assembly is proposed, which aims to solve to some extent the technical problems of inconvenient adjustment and poor stability of the locking structure used for position adjustment in existing headrests.

[0009] A headrest assembly comprising:

[0010] First support;

[0011] The mounting bracket is slidably connected to the first bracket;

[0012] The headrest is connected to the mounting bracket;

[0013] The first locking structure includes a first slide block, a first retaining member, and a second retaining member. The first slide block is slidably disposed on one of the first bracket and the mounting bracket. The second retaining member is disposed on the other of the first bracket and the mounting bracket. The first retaining member is movably disposed on the first slide block and is linked to the first slide block. The second retaining member is disposed opposite to the first retaining member.

[0014] Specifically, by sliding the first slide block, the first holding member is driven to move toward the second holding member to form a holding engagement with the second holding member to lock the mounting bracket, or the first holding member is driven to move away from the second holding member to cancel the holding engagement with the second holding member to unlock the mounting bracket.

[0015] In some embodiments, the first bracket or the mounting bracket is provided with a first slide groove, and the first slide block is located in the first slide groove and can slide relative to the first slide groove;

[0016] A first guide structure is provided between the first holding member and the first sliding groove. The first guide structure includes a first guide shaft and a first guide groove. The first guide shaft is disposed on one of the side wall of the first holding member and the groove wall of the first sliding groove, and the first guide groove is disposed on the other of the side wall of the first holding member and the groove wall of the first sliding groove. The first guide shaft passes through the first sliding block and extends into the first guide groove.

[0017] Wherein, the first guide slide shaft slides relative to the first guide groove when the first slide block slides, so as to drive the first holding member to move toward or away from the second holding member.

[0018] In some embodiments, the first slide block is provided with an inclined groove through which the first guide slide shaft passes, and the first guide slide shaft forms a contact fit with the groove wall of the inclined groove;

[0019] Wherein, the extension direction of the first guide groove is the same as the movement direction of the first clamping member, and the extension direction of the inclined groove has an angle with the movement direction of the first clamping member.

[0020] In some embodiments, the inclined groove can be a composite structure with a horizontal section. Specifically, the inclined groove includes an inclined section and a horizontal section, the extension direction of the inclined section has an angle with the moving direction of the first slide, the horizontal section is arranged parallel to the moving direction of the first slide, and the inclined section and the horizontal section are smoothly connected.

[0021] The horizontal section design restricts the movement of the first locking member when the first guide shaft slides to the horizontal section, ensuring that the first locking structure remains taut. Even with slight errors in the length of the first pull cable, the horizontal section provides structural support to ensure reliable engagement between the first and second locking members, preventing loosening of the first locking structure due to excessively long pull cables, and / or avoiding issues such as free travel or gaps in the unlocking button when unlocking the mounting bracket, significantly increasing the structure's tolerance.

[0022] In some embodiments, the number of the first guide structures is one set, and the set of first guide structures is located on one side of the first holding member; or...

[0023] The number of the first guide structures is two sets. One set of the first guide structures is located on one side of the first clamping member, and the other set of the first guide structures is located on the other side of the first clamping member. The two sets of the first guide structures are positioned opposite each other.

[0024] In some embodiments, one of the first retaining member and the second retaining member is provided with a first retaining tooth, and the other of the first retaining member and the second retaining member is provided with a first retaining groove. The number of at least one of the first retaining tooth and the first retaining groove is multiple and they are arranged sequentially along the sliding direction of the first slide.

[0025] The first locking tooth is used to engage with the first locking slot when the first locking member moves toward the second locking member so that the first locking member and the second locking member form a locking engagement, or to disengage from the first locking slot when the first locking member moves away from the second locking member so that the locking engagement between the first locking member and the second locking member is canceled.

[0026] In some embodiments, the first slot is an oblique slot, and the first tooth is an oblique tooth adapted to the oblique slot.

[0027] The first slot forms a stop on the first tooth to restrict the first holding member from sliding relative to the second holding member in a first direction, and the first tooth can exit the first slot when the first holding member slides relative to the second holding member in a second direction, wherein the second direction is opposite to the first direction.

[0028] In some embodiments, the headrest assembly further includes:

[0029] A first actuating structure is connected to the first slide block, and the first actuating structure is used to drive the first slide block to slide.

[0030] In some embodiments, the first actuating structure includes:

[0031] The first pull wire is connected to the first slide block;

[0032] A first wired switch is disposed on the headrest and connected to the first pull cord. The first wired switch is used to pull the first pull cord to drive the first slide block to slide.

[0033] A reset element acts on the first slide block, and the reset element is used to provide a force to reset the first slide block.

[0034] In some embodiments, the headrest assembly further includes:

[0035] The second bracket is slidably connected to the first bracket, and the direction in which the first bracket slides relative to the second bracket is different from the direction in which the mounting bracket slides relative to the first bracket.

[0036] The second locking structure includes a second slide, a third retainer and a fourth retainer. The second slide is slidably disposed on one of the second bracket and the first bracket. The fourth retainer is disposed on the other of the second bracket and the first bracket. The third retainer is movably disposed on the second slide and is linked to the second slide. The fourth retainer and the third retainer are disposed opposite to each other.

[0037] Wherein, by sliding the second slide block, the third holding member is driven to move toward the fourth holding member to form a holding engagement with the fourth holding member to lock the first bracket, or the third holding member is driven to move away from the fourth holding member to cancel the holding engagement with the fourth holding member to unlock the first bracket;

[0038] The second slide is linked to the first slide, and when one of the first slide and the second slide slides, it drives the other slides synchronously.

[0039] In some embodiments, the headrest assembly further includes:

[0040] A first actuating structure is connected to the first slide block, and the first actuating structure is used to drive the first slide block to slide; or...

[0041] The second actuating structure is connected to the second slide block, and the second actuating structure is used to drive the second slide block to slide.

[0042] In some embodiments, the headrest assembly further includes:

[0043] A linkage rod is provided inside the first bracket. One end of the linkage rod is connected to the first slide block, and the other end of the linkage rod is connected to the second slide block. When one of the first slide block and the second slide block slides, the other slides synchronously through the linkage rod.

[0044] According to a second aspect of this application, a seat is also provided, the seat comprising a seat body and a headrest assembly as described in the first aspect of this application, the headrest assembly being disposed on the seat body.

[0045] The headrest assembly according to the first aspect of this application supports the user's head and / or neck. If the user needs to adjust the support position of the headrest, the first sliding block of the first locking structure can be controlled to slide, causing the first latching member to move away from the second latching member and disengage from the second latching member, thereby unlocking the mounting bracket on the first bracket. Thus, the support position of the headrest can be adjusted by causing the mounting bracket to slide on the first bracket. After the adjustment is completed, the first sliding block can be controlled to slide, causing the first latching member to move towards the second latching member and engage with the second latching member, thereby locking the mounting bracket on the first bracket. The adjustment operation is simple and convenient, and under the engagement of the first and second latching members, the mounting bracket is securely locked on the first bracket, so that the headrest has a stable support position, with good structural stability, which helps to improve the user experience.

[0046] According to a third aspect of this application, a headrest assembly is also proposed, which aims to solve to some extent the technical problem in the related art that the headrest is prone to displacement when the user leans back.

[0047] A headrest assembly comprising:

[0048] Support components;

[0049] The slide rod is slidably connected to the support member;

[0050] A headrest is located in front of and connected to the slide rod;

[0051] The slide bar can slide up and down relative to the support member and lock to adjust the height of the headrest;

[0052] At least one of the sliding rod and the support member is provided with a stop structure, which is used to restrict the sliding rod in the locked state from sliding on the support member when the headrest is subjected to a leaning force.

[0053] In some embodiments, the support member is provided with a sliding cavity, and the slide rod is inserted into the sliding cavity to be slidably connected with the support member.

[0054] In some embodiments, the stop structure includes:

[0055] A stop is provided on one of the outer wall of the slide rod and the inner wall of the slide cavity. When the headrest is subjected to a leaning force, the stop engages with the other of the outer wall of the slide rod and the inner wall of the slide cavity to restrict the slide rod in the locked state from sliding on the support.

[0056] In some embodiments, the stop member is used to abut against the outer wall of the slide rod or the inner wall of the slide cavity to form the stop engagement.

[0057] In some embodiments, the outer wall of the slide rod or the inner wall of the slide cavity is provided with a plurality of grooves, and the plurality of grooves are arranged sequentially along the sliding direction of the slide rod;

[0058] The stop is used to extend into at least one of the plurality of grooves to form the stop fit.

[0059] In some embodiments, the number of grooves may be one, and the stop member is used to extend into the one groove to form the stop fit.

[0060] In some embodiments, the stop is an elastic element.

[0061] In some embodiments, the elastic element is an elastic silicone block; or,

[0062] The elastic element is an elastic sheet, which has at least one protrusion. The elastic sheet forms a stop fit with the outer wall of the slide rod or the inner wall of the slide cavity through the protrusion.

[0063] In some embodiments, an elastic buckle is provided on one of the outer wall of the slide rod and the inner wall of the slide cavity, and a plurality of slots are provided on the other of the outer wall of the slide rod and the inner wall of the slide cavity. The plurality of slots are arranged sequentially along the sliding direction of the slide rod, and the elastic buckle is used to engage with the slots to lock the slide rod.

[0064] In some embodiments, the stop structure is located on the rear side of the slide rod along the front-rear direction of the headrest; and / or,

[0065] The support member has an opening that communicates with the sliding cavity, and the stop structure is located at the opening.

[0066] In some embodiments, the outer wall of the slide rod is provided with an elastic anti-detachment member, and the inner wall of the slide cavity is provided with an anti-detachment groove. The elastic anti-detachment member can be used to lock into the anti-detachment groove when the slide rod slides up to the limit position in the slide cavity to prevent the slide rod from detaching from the slide cavity.

[0067] The outer wall of the support member is provided with a clearance hole that communicates with the anti-detachment groove. The clearance hole is used to allow a tool to be inserted to push the elastic anti-detachment member out of the anti-detachment groove.

[0068] According to a fourth aspect of this application, a seat is also provided, the seat comprising a seat body, a backrest support disposed on the seat body, and a headrest assembly as described in the third aspect of this application, the support being connected to the backrest support.

[0069] The headrest assembly according to the third aspect of this application allows for height adjustment by sliding a slider up and down on the support member. After adjustment to the desired height, the slider locks on the support member. When the user leans back against the headrest, the headrest is supported by the user's head and / or neck. The stop structure restricts the slider from sliding on the support member in the locked state, thus preventing displacement of the headrest. This ensures the headrest maintains support for the user's head and / or neck at the desired height, improving the user experience. Attached Figure Description

[0070] Figure 1 is a schematic diagram of the headrest assembly in one embodiment of this application;

[0071] Figure 2 is a structural schematic diagram of the headrest assembly in the embodiment of Figure 1 from another perspective;

[0072] Figure 3 is an enlarged view of point A in Figure 2;

[0073] Figure 4 is a structural schematic diagram of the headrest assembly in the embodiment of Figure 1 from another perspective;

[0074] Figure 5 is a cross-sectional view of BB in Figure 4;

[0075] Figure 6 is an enlarged view of point C in Figure 5;

[0076] Figure 7 is an enlarged view of point D in Figure 5;

[0077] Figure 8 is a structural schematic diagram of a part of the headrest assembly in the embodiment of Figure 1;

[0078] Figure 9 is an exploded view of a portion of the headrest assembly in the embodiment of Figure 1;

[0079] Figure 10 is a structural schematic diagram of another part of the headrest assembly in the embodiment of Figure 1;

[0080] Figure 11 is a schematic diagram of the structure of the first tooth and the first slot cooperating in one embodiment of this application.

[0081] Figure 12 is a schematic diagram of the headrest assembly in one embodiment of this application;

[0082] Figure 13 is a structural schematic diagram of a part of the headrest assembly in the embodiment of Figure 12;

[0083] Figure 14 is a schematic diagram of the internal structure of a part of the headrest assembly in the embodiment of Figure 13;

[0084] Figure 15 is an enlarged view of point E in Figure 14;

[0085] Figure 16 is a structural schematic diagram of another part of the headrest assembly in the embodiment of Figure 12;

[0086] Figure 17 is a structural schematic diagram of another part of the headrest assembly in the embodiment of Figure 12;

[0087] Figure 18 is a structural schematic diagram of the headrest assembly in another embodiment of this application;

[0088] Figure 19 is a cross-sectional view of the headrest assembly along the FF direction in the embodiment of Figure 18;

[0089] Figure 20 is an enlarged view of point G in Figure 19;

[0090] Figure 21 is a schematic diagram of the headrest assembly in another embodiment of this application;

[0091] Figure 22 is a cross-sectional view of the headrest assembly along the HH direction in the embodiment of Figure 21;

[0092] Figure 23 is an enlarged view of point I in Figure 22;

[0093] Figure 24 is a structural schematic diagram of the headrest assembly in another embodiment of this application;

[0094] Figure 25 is a schematic diagram of the slide bar of the headrest assembly in the embodiment of Figure 24;

[0095] Figure 26 is a structural schematic diagram of the seat in one embodiment of this application. Detailed Implementation

[0096] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0097] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0098] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0099] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0100] Example 1

[0101] This application provides a headrest assembly 100 for use in a seat. In addition to the headrest assembly 100, the seat also includes a base, a seat cushion, and a backrest. The seat cushion is disposed on the base for a user to sit on, providing support for the user's buttocks and thighs. The backrest is disposed behind the seat cushion and connected to the base, for a user to lean against, providing support for the user's back and lower back. When the headrest assembly 100 is used in a seat, it can be disposed on the backrest or on a backrest support bracket to provide support for the user's head and / or neck.

[0102] Referring to Figures 1 to 6, the headrest assembly 100 includes:

[0103] First support 110;

[0104] Mounting bracket 120 is slidably connected to first bracket 110;

[0105] Headrest 130 is connected to mounting bracket 120;

[0106] The first locking structure 140 includes a first slide 141, a first retaining member 142, and a second retaining member 143. The first slide 141 is slidably disposed on one of the first bracket 110 and the mounting bracket 120, and the second retaining member 143 is disposed on the other of the first bracket 110 and the mounting bracket 120. The first retaining member 142 is movably disposed on the first slide 141 and is linked to the first slide 141. The second retaining member 143 is disposed opposite to the first retaining member 142.

[0107] Specifically, by sliding the first slide block 141, the first retaining member 142 is driven to move toward the second retaining member 143 to form a retaining engagement with the second retaining member 143 to lock the mounting bracket 120, or the first retaining member 142 is driven to move away from the second retaining member 143 to cancel the retaining engagement with the second retaining member 143 to unlock the mounting bracket 120.

[0108] In the headrest assembly 100 involved in this embodiment, as shown in Figures 1 and 2, the first bracket 110 serves as the structural foundation of the headrest assembly 100, providing stable support for the installation and movement of other components. The first bracket 110 can be a rod-shaped or column-shaped structure and can be installed on the backrest or backrest support of the seat, possessing sufficient strength and rigidity to withstand various forces acting on the headrest assembly 100 during use.

[0109] The mounting bracket 120 is slidably connected to the first support 110, allowing it to move in a predetermined direction relative to the first support 110, thereby moving the headrest 130 to change its position and adjusting the position of the headrest 130. The predetermined direction can be the fore-and-aft direction of the seat; the sliding of the mounting bracket 120 relative to the first support 110 adjusts the position of the headrest 130 in the fore-and-aft direction. This is merely an example and not a limitation. As shown in Figures 2 and 3, to ensure smooth and stable sliding, the shape and structure of the mounting bracket 120 are adapted to the first support 110. The mounting bracket 120 may include an integrally formed headrest connecting part and a sliding part. The sliding part has a semi-cylindrical cavity, and one end of the first support 110 is housed in this semi-cylindrical cavity and slides into the sliding part. The headrest connecting part is located at one end of the sliding part and has two counter-extending, symmetrically arranged connecting arms, the ends of which are connected to the headrest 130.

[0110] The headrest 130 is designed to directly contact the user's head, providing comfortable support. The headrest 130 is typically made of a soft and elastic material (such as memory foam), and its ergonomic design effectively relieves neck fatigue and pressure. Optionally, the headrest 130 is rotatably connected to the mounting bracket 120, allowing it to adaptively adjust its support position according to the user's head and / or neck position when the user leans against it.

[0111] As shown in Figures 3 and 6, the first locking structure 140 is disposed between the first bracket 110 and the mounting bracket 120 to lock or unlock the mounting bracket 120. In the locked state, the mounting bracket 120 remains fixed relative to the first bracket 110, while in the unlocked state, it can move freely relative to the first bracket 110. The first locking structure 140 consists of a first slide 141, a first retaining member 142, and a second retaining member 143. The first slide 141 and the first retaining member 142 and the second retaining member 143 are respectively disposed on the first bracket 110 and the mounting bracket 120. Specifically, the first slide 141 can be disposed on the mounting bracket 120, and the second retaining member 143 on the first bracket 110; or, the first slide 141 can be disposed on the first bracket 110, and the second retaining member 143 on the mounting bracket 120, depending on actual requirements. The first slide block 141 is slidable. For example, if the first slide block 141 is mounted on the mounting frame 120, it can be connected to the mounting frame 120 through a structure such as a guide rail or a slide groove, so that the first slide block 141 can slide linearly on the mounting frame 120 and maintain good guidance during the sliding process to avoid deviation or jamming.

[0112] Furthermore, since the first holding member 142 is disposed on the first slide block 141 and is linked to the first slide block 141, the first holding member 142 can move along with the first slide block 141 when it slides. The linkage between the first holding member 142 and the first slide block 141 can be achieved by a gear and rack structure or other suitable transmission structure, which will be further explained in subsequent embodiments. Specifically, the first slide block 141 has two opposite sliding directions, namely direction one and direction two. When the first slide block 141 slides towards direction one, it can drive the first holding member 142 to move towards the second holding member 143 to form a holding engagement with the second holding member 143, thereby locking the mounting bracket 120. At this time, the headrest 130 is in a fixed position, which can provide stable and reliable support for the user's head and / or neck. When the first slide block 141 slides towards direction two, it can drive the first holding member 142 to move away from the second holding member 143 to cancel the holding engagement with the second holding member 143, thereby unlocking the mounting bracket 120. In this way, the mounting bracket 120 can slide freely relative to the first bracket 110, realizing the adjustment of the position of the headrest 130.

[0113] The working process of the headrest assembly 100 in this embodiment is as follows:

[0114] When the user needs to adjust the position of the headrest 130, force is first applied to the first slide 141, causing it to slide on its mounting bracket 120 or the first support 110. For example, if the first slide 141 is on the mounting bracket 120, an external force pushes it to move in the second direction. Due to the linkage between the first retaining member 142 and the first slide 141, the sliding of the first slide 141 will cause the first retaining member 142 to move synchronously. During this process, the first retaining member 142 gradually moves away from the second retaining member 143, and the retaining engagement between them is canceled, thereby unlocking the mounting bracket 120. At this time, the mounting bracket 120 can slide freely relative to the first support 110. The user can slide the mounting bracket 120 to a suitable position according to their own needs, so that the headrest 130 is in a more comfortable position.

[0115] Once the mounting bracket 120 reaches the desired position, the external force on the first slide block 141 is released. Under the action of some elastic reset elements or other mechanical structures, the first slide block 141 will slide in one direction, causing the first retaining member 142 to move towards the second retaining member 143. The first retaining member 142 and the second retaining member 143 re-establish a retaining engagement, locking the mounting bracket 120 in the current position. The headrest 130 is also fixed accordingly, ensuring that the headrest 130 will not move arbitrarily during subsequent use, providing stable and reliable support for the user's head and / or neck.

[0116] With the engaging action of the first retaining member 142 and the second retaining member 143, the mounting bracket 120 is securely locked onto the first support 110, ensuring a stable support position for the headrest 130. In this embodiment, the headrest assembly achieves position adjustment and locking of the headrest 130 through the first locking structure 140. The adjustment operation is simple and convenient, and the structure has good stability, which helps to improve the user experience.

[0117] Throughout the process, the components work closely and in a coordinated manner. Through the ingenious design of the first locking structure 140, the headrest assembly 100 achieves convenient adjustment and stable locking functions, effectively improving the user experience. Furthermore, the headrest assembly 100 has a relatively simple structure, good economy and practicality, and can be widely used in various types of seats.

[0118] In some embodiments, referring to Figures 6, 8 and 9, the first bracket 110 or mounting bracket 120 is provided with a first sliding groove H1, and the first slide block 141 is located in the first sliding groove H1 and can slide relative to the first sliding groove H1.

[0119] A first guide structure is provided between the first holding member 142 and the first sliding groove H1. The first guide structure includes a first guide shaft Z1 and a first guide groove C1. The first guide shaft Z1 is disposed on one of the side wall of the first holding member 142 and the groove wall of the first sliding groove H1. The first guide groove C1 is disposed on the other of the side wall of the first holding member 142 and the groove wall of the first sliding groove H1. The first guide shaft Z1 passes through the first sliding block 141 and extends into the first guide groove C1.

[0120] The first guide slide Z1 slides relative to the first guide groove C1 when the first slide block 141 slides, so as to drive the first holding member 142 to move toward or away from the second holding member 143.

[0121] When the first slide block 141 is mounted on the first bracket 110 or the mounting bracket 120, the first bracket 110 or the mounting bracket 120 is correspondingly provided with a first sliding groove H1 to accommodate the first slide block 141 and realize the slidable setting of the first slide block 141. The first sliding groove H1 provides a sliding track for the first slide block 141 and determines the sliding trajectory, restricting the movement direction of the first slide block 141, so that the first slide block 141 can slide smoothly along a predetermined straight line direction.

[0122] The first guide structure provided between the first holding member 142 and the first sliding groove H1 is used to slide and guide the first holding member 142 to guide its sliding direction. Specifically, the first guide shaft Z1 and the first guide groove C1 of the first guide structure are respectively provided on the side wall of the first holding member 142 and the groove wall of the first sliding groove H1. Alternatively, the first guide shaft Z1 can be provided on the side wall of the first holding member 142 and the first guide groove C1 can be provided on the groove wall of the first sliding groove H1; or, the first guide shaft Z1 can be provided on the groove wall of the first sliding groove H1 and the first guide groove C1 can be provided on the side wall of the first holding member 142.

[0123] When it is necessary to lock the mounting bracket 120, the first slide block 141 slides in the first slide groove H1 in the first direction. Due to the structure of the first guide slide shaft Z1 passing through the first slide block 141 and extending into the first guide groove C1, the sliding of the first slide block 141 will drive the first guide slide shaft Z1 to slide relative to each other in the first guide groove C1. The first holding member 142 moves towards the second holding member 143 under the action of the first guide slide shaft Z1 until it forms a holding engagement with the second holding member 143.

[0124] When the mounting bracket 120 needs to be unlocked, the first slide block 141 slides in the first slide groove H1 in the direction of direction two. Similarly, due to the structure of the first guide slide shaft Z1 passing through the first slide block 141 and extending into the first guide groove C1, the sliding of the first slide block 141 will drive the first guide slide shaft Z1 to slide relative to each other in the first guide groove C1. Under the drive of the first guide slide shaft Z1, the first holding member 142 moves away from the second holding member 143 and gradually cancels the holding engagement with the second holding member 143.

[0125] This structural design has high motion accuracy and reliability, enabling the first clamping member 142 to move smoothly and accurately. At the same time, the setting of the first guide structure effectively restricts the degree of freedom of the first clamping member 142, making it only able to move in a predetermined direction, thereby improving the stability of the first locking structure 140.

[0126] In some embodiments, referring to Figures 6 and 9, the first slide block 141 is provided with a slanted groove XC through which the first guide slide shaft Z1 passes, and the first guide slide shaft Z1 forms a contact fit with the groove wall of the slanted groove XC.

[0127] The first guide groove C1 extends in the same direction as the first holding member 142 moves, and the inclined groove XC extends at an angle to the first holding member 142 moves.

[0128] In this embodiment, the inclined groove XC can be a long strip-shaped groove with an inner diameter slightly larger than the outer diameter of the first guide shaft Z1 to form an appropriate clearance fit, ensuring that the first guide shaft Z1 can slide freely in the inclined groove XC while maintaining a certain contact pressure, so that the two can carry out stable and reliable motion transmission.

[0129] Taking the example of a first guide shaft Z1 located on the side wall of the first holding member 142 and a first guide groove C1 located on the groove wall of the first sliding groove H1, the first guide shaft Z1 can be vertically installed on the side wall of the first holding member 142, perpendicular to the moving direction of the first holding member 142, and the first guide shaft Z1 passes through the inclined groove XC of the first slide block 141, forming a contact fit with the groove wall of the inclined groove XC. The first guide groove C1 is located on the groove wall of the first sliding groove H1, and its extending direction is the same as the moving direction of the first holding member 142. The shape and size of the first guide groove C1 match the first guide shaft Z1, and the first guide shaft Z1 extends into the first guide groove C1 after passing through the inclined groove XC of the first slide block 141.

[0130] When an external force drives the first slide block 141 to slide in the first slide groove H1 along a specific direction, the sliding of the first slide block 141 will cause the first guide slide shaft Z1 to slide relative to the first guide slide shaft Z1 in the inclined groove XC due to the contact engagement between the first guide slide shaft Z1 and the inclined groove XC on the first slide block 141. Since there is an angle between the extension direction of the inclined groove XC and the movement direction of the first holding member 142, the sliding of the first guide slide shaft Z1 in the inclined groove XC will generate a component force perpendicular to the sliding direction of the first slide block 141. This component force is transmitted to the first holding member 142 through the first guide slide shaft Z1, thereby driving the first holding member 142 to move in the same direction as the extension direction of the first guide groove C1 under the constraint of the first guide groove C1, that is, realizing the movement of the first holding member 142 toward or away from the second holding member 143. That is, when the first slide block 141 slides, the first holding member 142 can be driven to move toward or away from the second holding member 143 through the coordinated action of the first guide slide shaft Z1, the inclined groove XC and the first guide groove C1.

[0131] Optionally, the inclined groove XC can be a composite structure with a horizontal section. Specifically, the inclined groove XC includes an inclined section and a horizontal section. The extending direction of the inclined section forms an angle with the moving direction of the first slide 141, and the horizontal section is arranged parallel to the moving direction of the first slide 141. The inclined section and the horizontal section are smoothly connected.

[0132] The horizontal section design restricts the travel of the first locking member 142 when the first guide shaft Z1 slides to the horizontal section, ensuring that the first locking structure 140 remains taut. Even with slight errors in the length of the first pull cable, the horizontal section's structural limitation ensures a reliable locking engagement between the first locking member 142 and the second locking member 143, preventing the first locking structure 140 from becoming loose due to an excessively long pull cable, and / or preventing any empty travel or gaps in the unlocking button when unlocking the mounting bracket 120, significantly increasing the structure's tolerance.

[0133] The inclined and horizontal sections of the sloping groove XC form an "L" shaped trajectory. When the mounting bracket 120 needs to be locked, the first slide block 141 slides in the first slide groove H1 in direction one. Due to the structure of the first guide slide shaft Z1 passing through the first slide block 141 and extending into the first guide groove C1, the sliding of the first slide block 141 will first drive the first guide slide shaft Z1 to slide relative to each other in the inclined section of the sloping groove XC. When the first slide block 141 continues to slide in direction one, the continued sliding of the first slide block 141 will drive the first guide slide shaft Z1 to slide relative to each other into the horizontal section of the sloping groove XC. The first holding member 142 moves towards the second holding member 143 under the action of the first guide slide shaft Z1 until it forms a holding engagement with the second holding member 143.

[0134] When the mounting bracket 120 is unlocked, the first slide block 141 slides in the first slide groove H1 toward direction two, and the first retaining member 142 slides relative to the first slide block 141 along the horizontal section toward direction one. When the first slide block 141 continues to slide toward direction two, due to the structure of the first guide slide shaft Z1 passing through the first slide block 141 and extending into the first guide groove C1, the continued sliding of the first slide block 141 will drive the first guide slide shaft Z1 to slide relative to each other in the inclined section of the inclined groove XC. Under the drive of the first guide slide shaft Z1, the first retaining member 142 moves away from the second retaining member 143 and gradually cancels the retaining engagement with the second retaining member 143.

[0135] In some embodiments, the number of first guide structures is one set, and the set of first guide structures is located on one side of the first holding member 142; or,

[0136] As shown in Figure 9, there are two sets of first guide structures. One set of first guide structures is located on one side of the first holding member 142, and the other set of first guide structures is located on the other side of the first holding member 142. The two sets of first guide structures are positioned opposite each other.

[0137] In this embodiment, the number of first guide structures can be set to one or two sets. When the number of first guide structures is one set, the first guide structure is set on one side of the first holding member 142 along its width direction, that is, the first guide structure is set on one side of the first holding member 142. The structure is relatively simple and can reduce the complexity and manufacturing cost of the first locking structure 140 while meeting the basic guiding requirements. When the number of first guide structures is two sets, the two sets of first guide structures are respectively set on both sides of the first holding member 142 along its width direction, that is, the first guide structure is set on both sides of the first holding member 142. Under this configuration, the two sets of first guide structures work together to more accurately restrict the degree of freedom of movement of the first holding member 142, so that it moves more smoothly and accurately toward or away from the second holding member 143 during the movement, which significantly improves the stability and guiding accuracy of the movement of the first holding member 142. Compared to a single-sided guide structure, a double-sided guide structure can effectively counteract possible lateral forces and imbalances, further improving the straightness and positional accuracy of the first clamping member 142, and ensuring stable and reliable clamping operation under various complex working conditions.

[0138] Optionally, as shown in Figures 8 and 9, the groove wall of the first slide groove H1 is provided with a latch KC, which engages with the first slide block 141 to prevent the first slide block 141 from disengaging from the first slide groove H1. Multiple latches KC can be provided, and these latches KC are divided into two groups, with each group located on a opposite side of the groove wall of the first slide groove H1. During assembly, the first slide block 141 is first aligned with the opening of the first slide groove H1, and then inserted into the first slide groove H1. During insertion, the first slide block 141 gradually compresses the latch KC, causing the latch KC to elastically deform and open outwards. When the first slide block 141 is fully inserted into the first slide groove H1, the latch KC, under its own elastic restoring force, tightly engages with the first slide block 141, thus achieving a reliable connection between the first slide block 141 and the first slide groove H1.

[0139] In some embodiments, referring to Figures 6, 9 and 10, one of the first holding member 142 and the second holding member 143 is provided with a first holding tooth 11, and the other of the first holding member 142 and the second holding member 143 is provided with a first holding groove 12. The number of at least one of the first holding tooth 11 and the first holding groove 12 is multiple and they are arranged sequentially along the sliding direction of the first slide block 141.

[0140] The first locking tooth 11 is used to engage with the first locking slot 12 when the first locking member 142 moves toward the second locking member 143 so that the first locking member 142 and the second locking member 143 form a locking engagement, or to disengage from the first locking slot 12 when the first locking member 142 moves away from the second locking member 143 so that the locking engagement between the first locking member 142 and the second locking member 143 is canceled.

[0141] In this embodiment, the first holding member 142 and the second holding member 143 achieve holding by the structural cooperation of the first holding tooth 11 and the first holding groove 12. The first holding member 142 may be provided with the first holding tooth 11 and the second holding member 143 may be provided with the first holding groove 12; or the second holding member 143 may be provided with the first holding tooth 11 and the first holding member 142 may be provided with the first holding groove 12, depending on the actual needs.

[0142] As an example, the first retaining member 142 has a plurality of first retaining teeth 11 evenly distributed on the side facing the second retaining member 143. The first retaining teeth 11 are rectangular or trapezoidal in shape, have a certain length and thickness, and the tips of the teeth can be rounded to prevent stress concentration and damage to the retaining teeth or retaining grooves when engaging or disengaging from the first retaining grooves 12. Correspondingly, the second retaining member 143 has first retaining grooves 12 that match the first retaining teeth 11 on the side facing the first retaining member 142. The shape, size and spacing of the first retaining grooves 12 are adapted to the first retaining teeth 11 to ensure that the first retaining teeth 11 can smoothly engage and disengage from the first retaining grooves 12.

[0143] By setting multiple first locking teeth 11 and first locking slots 12 and arranging them sequentially along the sliding direction of the first sliding groove H1, the number of locking points is increased, thereby improving the reliability and stability of the locking engagement between the first locking member 142 and the second locking member 143. Furthermore, due to the presence of multiple first locking teeth 11 and first locking slots 12, when the mounting bracket 120 slides relative to the first support 110 to adjust its position, the first locking member 142 can be engaged in the first locking slot 12 through the corresponding first locking tooth 11 to form a locking engagement with the second locking member 143, thereby locking the mounting bracket 120.

[0144] In some embodiments, referring to FIG11, the first slot 12 is an oblique slot, and the first tooth 11 is an oblique tooth adapted to the oblique slot.

[0145] The first slot 12 forms a stop on the first tooth 11 to restrict the first holding member 142 from sliding relative to the second holding member 143 in a first direction, and the first tooth 11 can exit the first slot 12 when the first holding member 142 slides relative to the second holding member 143 in a second direction, wherein the second direction is opposite to the first direction.

[0146] In this embodiment, when the first retaining member 142 is subjected to an external force along the first direction, the oblique retaining teeth will fit tightly against the inner wall of the oblique retaining groove. Due to the oblique design of the oblique retaining groove, the oblique retaining teeth cannot move in this direction, thereby effectively limiting the displacement of the first retaining member 142 relative to the second retaining member 143 and ensuring the stability of the connection. When the first retaining member 142 slides relative to the second retaining member 143 along the second direction, since the second direction is opposite to the first direction, the shape of the oblique retaining teeth and the oblique angle of the oblique retaining groove allow the oblique retaining teeth to gradually slide out of the oblique retaining groove as they move along the second direction, realizing the separation of the first retaining member 142 and the second retaining member 143. This separation process is relatively smooth and will not damage the retaining teeth and the groove.

[0147] Based on this, a corresponding oblique slot can be configured to stop the oblique locking teeth and allow for withdrawal, so that the headrest 130 can be adjusted forward and locked backward. For example, when the user needs to adjust the position of the headrest 130 forward, the mounting bracket 120 can be moved forward directly. At this time, the first locking member 142 slides relative to the second locking member 143 in the second direction as the mounting bracket 120 moves, so that the first locking tooth 11 exits from the first slot 12. That is, there is no need to unlock the mounting bracket 120, and the position of the headrest 130 can be adjusted forward directly. When the user leans against the headrest 130, a backward force is transmitted to the mounting bracket 120 to make the first locking member 142 slide relative to the second locking member 143 in the first direction. However, the first slot 12 stops the first locking member to ensure that the headrest 130 provides stable support for the user's head and / or neck.

[0148] However, if the user needs to adjust the headrest 130 backward, the first slide block 141 must be slid to move the first retaining member 142 synchronously. During this process, the first retaining member 142 gradually moves away from the second retaining member 143, the retaining engagement between the two is canceled, and the mounting bracket 120 is unlocked, allowing the headrest 130 to be adjusted backward.

[0149] In some embodiments, referring to Figures 1 and 3, the headrest assembly 100 further includes a first actuation structure 150 connected to a first slide block 141, the first actuation structure 150 being used to drive the first slide block 141 to slide. The user can control the sliding of the first slide block 141 through the first actuation structure 150, thereby unlocking and locking the headrest 130's position adjustment function.

[0150] The first actuation mechanism 150 can be a manual mechanism, and the manual mechanism can take various forms, such as:

[0151] In some embodiments, referring to Figures 1, 3, and 8, the first actuating structure 150 includes:

[0152] The first pull wire 151 is connected to the first slide block 141. As a flexible component for transmitting power, the first pull wire 151 can effectively transmit the pulling force from the first wired switch 152 to the first slide block 141, thereby driving the first slide block 141 to slide. The first pull wire 151 is usually made of a high-strength, flexible and wear-resistant material (such as steel wire rope) to ensure that it will not easily break or be damaged during long-term use.

[0153] A first wired switch 152 is disposed on the headrest 130 and connected to a first pull cord 151. The first wired switch 152 is used to pull the first pull cord 151 to drive the first slide block 141 to slide. Optionally, the first wired switch 152 is located on the rear side of the headrest 130, allowing the user to easily operate the first wired switch 152 to drive the first slide block 141 to slide by pulling the first pull cord 151. The first wired switch 152 can be designed in various forms, such as a button, rocker, toggle, or slider, etc. It has a comfortable operating feel, sensitive response, and can accurately control the pulling amplitude of the first pull cord 151, thereby achieving precise control of the sliding distance of the first slide block 141, and thus achieving precise control of unlocking the headrest 130 position adjustment function.

[0154] A reset element acts on the first slide block 141, providing a force to reset the first slide block 141. The reset element can be an elastic element such as a spring. When the user releases the first wired switch 152, the elastic force of the reset element causes the first slide block 141 to slide in the opposite direction, returning to its initial position or a preset locked position. For example, when a spring acts as the reset element, one end is connected to the first slide block 141, and the other end is fixed at an appropriate position on the mounting bracket 120 or the first support 110. When the first slide block 141 is pulled by the first pull cable 151 to unlock the mounting bracket 120, the first latching member 142 and the second latching member 143 release their latching engagement, and the spring is stretched or compressed, storing elastic potential energy. When the tension disappears, the spring releases its elastic potential energy, pushing the first slide block 141 to move in the opposite direction, causing the first latching member 142 to re-engage with the second latching member 143, thereby locking the mounting bracket 120 and ensuring the stability of the headrest 130 position.

[0155] In addition, the first actuating structure 150 can also be an electric structure, and the electric structure can take various forms, such as:

[0156] In an optional embodiment, the first actuating structure 150 can be an electric push rod, a linear motor, or a hydraulic drive device, etc. Taking an electric push rod as an example, it consists of a motor, a push rod, a controller, and a power supply. The free end of the push rod is connected to the first slide block 141, and the motor drives the push rod to extend and retract under the command of the controller. When the position of the headrest 130 needs to be adjusted, the controller receives an adjustment signal from the outside (such as when the user presses the headrest 130 adjustment button on the seat armrest), starts the motor to drive the push rod to extend and retract, thereby pushing the first slide block 141 to slide, thus unlocking or locking the headrest 130 position adjustment function.

[0157] In some embodiments, referring to Figures 1, 2, 4, 5, and 7, the headrest assembly 100 further includes:

[0158] The second bracket 160 is slidably connected to the first bracket 110. The direction in which the first bracket 110 slides relative to the second bracket 160 is different from the direction in which the mounting bracket 120 slides relative to the first bracket 110.

[0159] The second locking structure 170 includes a second slide 171, a third retainer 172 and a fourth retainer 173. The second slide 171 is slidably disposed on one of the second bracket 160 and the first bracket 110. The fourth retainer 173 is disposed on the other of the second bracket 160 and the first bracket 110. The third retainer 172 is movably disposed on the second slide 171 and is linked to the second slide 171. The fourth retainer 173 is disposed opposite to the third retainer 172.

[0160] The third holding member 172 is driven to move toward the fourth holding member 173 by sliding the second sliding block 171 to form a holding engagement with the fourth holding member 173 to lock the first bracket 110, or the third holding member 172 is driven to move away from the fourth holding member 173 to cancel the holding engagement with the fourth holding member 173 to unlock the first bracket 110.

[0161] The second slide 171 is linked to the first slide 141. When one of the first slide 141 and the second slide 171 slides, it drives the other to slide synchronously.

[0162] The second bracket 160 can be a rod-shaped or columnar structure, used to mount the first bracket 110 and support the first bracket 110 for sliding. The first bracket 110 and the second bracket 160 are slidably connected, allowing for displacement relative to the second bracket 160 in a predetermined direction, thereby moving the headrest 130 to change its position and adjusting the position of the headrest 130. The predetermined direction can be vertical, and the sliding of the first bracket 110 relative to the second bracket 160 adjusts the height of the headrest 130 in the vertical direction. Optionally, the second bracket 160 has a sliding cavity, with the cavity opening located at the top of the second bracket 160. The first bracket 110 is inserted into the sliding cavity through the cavity opening to form a sliding engagement with the second bracket 160.

[0163] The second locking structure 170 is disposed between the second bracket 160 and the first bracket 110, and is used to lock or unlock the first bracket 110. In the locked state, the first bracket 110 remains fixed relative to the second bracket 160, while in the unlocked state, it can move freely relative to the second bracket 160. The second locking structure 170 consists of a second slide 171, a third retaining member 172, and a fourth retaining member 173. The second slide 171 and the third retaining member 172 and fourth retaining member 173 are respectively disposed on the first bracket 110 and the second bracket 160. Specifically, the second slide 171 can be disposed on the first bracket 110, and the fourth retaining member 173 on the second bracket 160; or, the second slide 171 can be disposed on the second bracket 160, and the fourth retaining member 173 on the first bracket 110, depending on actual requirements. The second slide 171 is slidable. For example, if the second slide 171 is mounted on the first bracket 110, it can be connected to the first bracket 110 through a structure such as a guide rail or a slide groove, so that the second slide 171 can slide linearly on the first bracket 110 and maintain good guidance during the sliding process to avoid deviation or jamming.

[0164] Since the third holding member 172 is located on the second slide 171 and is linked to the second slide 171, the third holding member 172 can move along with the second slide 171 when it slides. The linkage between the third holding member 172 and the second slide 171 can be achieved by a gear and rack structure or other suitable transmission structure, which will not be described in detail here. Specifically, the second slide 171 has two opposite sliding directions, namely direction three and direction four. When the second slide 171 slides towards direction three, it can drive the third retaining member 172 to move towards the fourth retaining member 173 to form a retaining engagement with the fourth retaining member 173, thereby locking the first bracket 110. At this time, the headrest 130 is in a fixed height position, which can provide stable and reliable support for the user's head and / or neck. When the second slide 171 slides towards direction four, it can drive the third retaining member 172 to move away from the fourth retaining member 173 to cancel the retaining engagement with the fourth retaining member 173, thereby unlocking the first bracket 110. In this way, the first bracket 110 can slide freely relative to the second bracket 160, realizing the adjustment of the height position of the headrest 130.

[0165] The specific working process of the headrest assembly 100 in this embodiment is as follows:

[0166] When the user needs to adjust the height of the headrest 130, force is first applied to the second slide 171, causing it to slide on its corresponding first support 110 or second support 160. For example, if the second slide 171 is on the first support 110, an external force pushes it to move in direction four. Due to the linkage between the third retaining member 172 and the second slide 171, the sliding of the second slide 171 will cause the third retaining member 172 to move synchronously. During this process, the third retaining member 172 gradually moves away from the fourth retaining member 173, and the retaining engagement between them is canceled, thereby unlocking the first support 110. At this time, the first support 110 can slide freely relative to the second support 160. The user can slide the first support 110 to a suitable position according to their needs, so that the headrest 130 is at a more comfortable height.

[0167] Once the first support 110 reaches the desired position, the external force on the second slide 171 is released. Under the action of some elastic reset elements or other mechanical structures, the second slide 171 will slide in the third direction, causing the third retaining member 172 to move towards the fourth retaining member 173. The third retaining member 172 and the fourth retaining member 173 re-establish a retaining engagement, locking the first support 110 in its current position. The headrest 130 is also fixed accordingly, ensuring that the headrest 130 will not move arbitrarily during subsequent use, providing stable and reliable support for the user's head and / or neck.

[0168] As shown in Figure 7, the third holding member 172 and the fourth holding member 173 can also be held together by setting the structure of the second tooth 21 and the second slot 22. The specific structure can be designed with reference to the first tooth 11 and the first slot 12 between the first holding member 142 and the second holding member 143, including but not limited to this, which will not be described in detail here.

[0169] With the cooperation of the third retaining member 172 and the fourth retaining member 173, the first bracket 110 is securely locked on the second bracket 160, so that the headrest 130 has a stable support position. When the user leans against the headrest 130, even if the pressure applied to the headrest 130 is too great, the headrest 130 is not easy to shift and always maintains support for the user's head and / or neck in its original position, which helps to improve the user experience.

[0170] The second slide 171 is linked to the first slide 141, meaning that when one slides, the other slides synchronously. This linkage design allows the user to unlock or lock one slide at the same time, enabling simultaneous unlocking or locking of the headrest 130 in two different directions with a single button operation. This improves adjustment efficiency and ensures the coordination and integrity of the headrest 130 when adjusted in different directions.

[0171] In some embodiments, referring to Figures 1 and 3, the headrest assembly 100 further includes:

[0172] The first actuating structure 150 is connected to the first slide block 141, and the first actuating structure 150 is used to drive the first slide block 141 to slide; or...

[0173] The second actuating structure is connected to the second slide block 171 and is used to drive the second slide block 171 to slide.

[0174] In this embodiment, the headrest assembly 100 is designed with either a first actuating structure 150 or a second actuating structure. When the first actuating structure 150 is present, it is connected to the first slide block 141 and is used to drive the first slide block 141 to slide. The structure of the first actuating structure 150 is the same as that of the first actuating structure 150 in the previous embodiment, and will not be described in detail here. The user can drive the first slide block 141 to slide through the first actuating structure 150, and simultaneously drive the second slide block 171 to slide, so as to realize the synchronous unlocking or locking of the headrest 130 in different directions of position adjustment.

[0175] When a second actuating structure is present, it is connected to the second slide 171 and is used to drive the second slide 171 to slide. The structure of the second actuating structure can be designed with reference to the first actuating structure 150 in the aforementioned embodiment. Alternatively, it can be a combination of a gear and rack mechanism and a manual knob. By manually rotating the knob, the rotational motion is converted into linear motion of the second slide 171 through the transmission of the gear and rack, thereby driving the engagement or disengagement of the third retaining member 172 and the fourth retaining member 173, realizing the locking and unlocking of the first bracket 110 relative to the second bracket 160. The above is only an example and is not restrictive. The user can drive the second slide 171 to slide through the provided second actuating structure, and drive the first slide 141 to slide synchronously, so as to realize the synchronous unlocking or locking of the headrest 130 in different directions of position adjustment.

[0176] In some embodiments, referring to Figures 6 and 10, the headrest assembly 100 further includes a linkage rod 180 disposed within the first bracket 110. One end of the linkage rod 180 is connected to the first slide block 141, and the other end of the linkage rod 180 is connected to the second slide block 171. When one of the first slide block 141 and the second slide block 171 slides, the other slides synchronously through the linkage rod 180.

[0177] In this embodiment, the first bracket 110 is hollow, and the linkage rod 180 is housed inside the first bracket 110 and connected to the first slide 141 and the second slide 171 respectively. The connection method may include hinges, etc., and is not limited here. The installation position of the linkage rod 180 inside the first bracket 110 can be precisely designed to ensure that it does not interfere with other components inside the first bracket 110 during movement. Simultaneously, the linkage rod 180 itself can have sufficient strength and rigidity to accurately transmit force and movement, ensuring the linkage accuracy between the first slide 141 and the second slide 171.

[0178] When the user unlocks the headrest 130 position adjustment function, an external force is applied to the first slide 141 to make it slide. The first slide 141 drives the second slide 171 to slide synchronously through the linkage rod 180. This achieves the unlocking or locking of the mounting bracket 120 and the first bracket 110, while the first bracket 110 and the second bracket 160 also perform corresponding unlocking or locking operations. This ensures that when the headrest 130 unlocks or locks the front and rear position adjustment function, the up and down position adjustment function is also unlocked simultaneously. For example, the mounting bracket 120 is provided with a first sliding groove H1, and the first sliding block 141 is located in the first sliding groove H1. When an external force is applied to the first sliding block 141 to make it slide in the second direction (such as forward), the first holding member 142 moves away from the second holding member 143 to cancel the holding engagement, so as to realize the unlocking between the mounting bracket 120 and the first bracket 110. The first holding member 142 is provided with a sliding groove to accommodate one end of the linkage rod 180 and to form a linkage connection between the linkage rod 180 and the first holding member 142. Thus, during the sliding of the first sliding block 141, the first holding member 142 moves away from the second holding member 143, the linkage rod 180 is lifted, and the second sliding block 171 slides in the fourth direction (such as upward), so that the third holding member 172 moves away from the fourth holding member 173 to cancel the holding engagement, thereby realizing synchronous unlocking. This embodiment effectively solves the problem of sliding block linkage during multi-directional adjustment, unlocking, and locking by using the linkage rod 180, thus improving the smoothness, accuracy, and stability of the headrest 130 position adjustment, unlocking, and locking process. Of course, besides the structure of the linkage rod 180, other linkage structures, such as linkage ropes, can also be used between the second sliding block 171 and the first sliding block 141 in other embodiments.

[0179] Example 2

[0180] This application also proposes a seat, which includes a seat body and a headrest assembly 100 as described in Embodiment 1 above, wherein the headrest assembly 100 is disposed on the seat body. The specific structure of the headrest assembly 100 is as described in the above embodiments. Since this seat adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0181] Example 3

[0182] This application provides a headrest assembly 2100 for use in a seat. In addition to the headrest assembly 2100, the seat also includes a base, a seat cushion, and a backrest. The seat cushion is disposed on the base for a user to sit on, providing support for the user's buttocks and thighs. The backrest is disposed behind the seat cushion and connected to the base, for a user to lean against, providing support for the user's back and lower back. When the headrest assembly 2100 is used in a seat, as shown in Figure 12, it can be disposed on the backrest or on a backrest bracket 300 for supporting the backrest, to provide support for the user's head and / or neck.

[0183] Referring to Figures 12 to 15, the headrest assembly 2100 includes:

[0184] Support component 2110;

[0185] The slide rod 2120 is slidably connected to the support member 2110;

[0186] The headrest 2130 is located in front of the slide bar 2120 and is connected to the slide bar 2120;

[0187] The slide bar 2120 can slide up and down relative to the support member 2110 and lock to adjust the height of the headrest 2130;

[0188] At least one of the slide bar 2120 and the support member 2110 is provided with a stop structure 2140. The stop structure 2140 is used to restrict the slide bar 2120, which is in a locked state, from sliding on the support member 2110 when the headrest 2130 is subjected to a leaning force.

[0189] In the headrest assembly 2100 involved in this embodiment, the support member 2110 serves as the structural foundation of the headrest assembly 2100, providing stable support for the installation and movement of other components. The support member 2110 can be a rod-shaped or column-shaped structure and can be installed on the backrest or backrest support of the seat, possessing sufficient strength and rigidity to withstand various forces acting on the headrest assembly 2100 during use.

[0190] The slide rod 2120 is slidably connected to the support member 2110, allowing it to move vertically relative to the support member 2110. This movement of the headrest 2130 changes its position, thus adjusting its height. The slide rod 2120 and the support member 2110 can have an insert-in structure, for example, the support member 2110 may have a cavity into which the slide rod 2120 is slidably inserted. Alternatively, the slide rod 2120 and the support member 2110 can have a sleeve-in structure, for example, the slide rod 2120 may be hollow, with the support member 2110 extending into it, and the slide rod 2120 slidably sleeved on the support member 2110.

[0191] The headrest 2130 is located in front of the slide bar 2120 and is connected to the slide bar 2120. The connection between the two can be direct or indirect through other components; this embodiment does not impose any limitations on this. The headrest 2130 is used for the user's head and / or neck to lean against, providing comfortable support. The headrest 2130 is typically made of a soft and elastic material (such as memory foam), and its shape is designed according to ergonomic principles, effectively relieving neck fatigue and pressure. Optionally, the headrest 2130 is rotatable on the slide bar 2120, allowing the headrest 2130 to adaptively adjust its support position according to the user's head and / or neck position when the user leans against it.

[0192] The slide rod 2120 can slide up and down relative to the support member 2110 and locks after driving the headrest 2130 to the preset height, thereby adjusting the height of the headrest 2130. The adjustment structure can be provided with multiple slots or positioning holes on the support member 2110, and the slide rod 2120 is correspondingly equipped with a retractable locking pin or elastic block. When the height of the headrest 2130 needs to be adjusted, a certain external force is applied to disengage the locking pin or block from the slot or positioning hole. Then, the slide rod 2120 is slid to the desired height position. Under the action of elastic restoring force or other structures, the locking pin or block re-engages into the corresponding slot or positioning hole, thereby locking the slide rod 2120 on the support member 2110 to fix the height of the headrest 2130.

[0193] At least one of the slide rod 2120 and the support member 2110 is provided with a stop structure 2140. Specifically, the stop structure 2140 can be provided on the slide rod 2120, or on the support member 2110, or on both the slide rod 2120 and the support member 2110, depending on actual needs. When the user's head and / or neck rests against the headrest 2130, causing the headrest 2130 to be subjected to a backward-leaning force, the stop structure 2140 can restrict the slide rod 2120, which is in a locked state, from sliding on the support member 2110. The stop structure 2140 can take various forms, such as a stop block or an elastic stop plate, and can be set on one of the support member 2110 and the slide rod 2120. When the headrest 2130 is subjected to a backward leaning force, even if the slide rod 2120 is locked, it still has a tendency to slide downward under the action of the leaning force. At this time, the stop block or elastic stop plate is pressed against the surface of the other of the support member 2110 and the slide rod 2120 and forms a frictional action. The frictional force is greater than the downward force, which can effectively prevent the slide rod 2120 from sliding in the locked state. In addition, the stop structure 2140 can also be an electrically driven stop structure. For example, the stop structure 2140 includes a stop block and a drive member for driving the stop block to extend and retract, and can be disposed on one of the support member 2110 and the slide bar 2120. The headrest 2130 is equipped with a pressure detection device. When the pressure detection device detects that the headrest 2130 is subjected to a leaning force, it sends a corresponding detection signal to the main control system. The main control system sends a control signal to the drive member, which drives the stop block to extend so as to press against the surface of the other of the support member 2110 and the slide bar 2120 and form a frictional force. The frictional force is greater than the sliding force, which can effectively prevent the slide bar 2120 from sliding in the locked state. When the leaning force on the headrest 2130 is removed, the drive member drives the stop block to retract to reset.

[0194] In the headrest assembly 2100 of this application, the height of the headrest 2130 can be adjusted by sliding the slider 2120 up and down on the support member 2110. After adjusting to the desired height, the slider 2120 locks on the support member 2110. When the user leans back against the headrest 2130, the headrest 2130 is subjected to the force of the user's head and / or neck. The stop structure 2140 can limit the sliding of the locked slider 2120 on the support member 2110, thereby preventing the headrest 2130 from shifting. This allows the headrest 2130 to maintain support for the user's head and / or neck at the desired height, which helps to improve the user experience.

[0195] In some embodiments, referring to Figures 15 and 16, the support member 2110 is provided with a sliding cavity 2110Q, and a sliding rod 2120 is inserted into the sliding cavity 2110Q to be slidably connected with the support member 2110. The shape and size of the sliding cavity 2110Q of the support member 2110 are precisely machined according to the shape of the sliding rod 2120, and the two have a high degree of adaptability to ensure that the sliding rod 2120 can be smoothly inserted and slid in it. Specifically, the top end of the support member 2110 is constructed with a cavity opening 2110K that communicates with the sliding cavity 2110Q. The cavity opening 2110K is adapted to the outer contour of the sliding rod 2120. The sliding rod 2120 is inserted into the sliding cavity 2110Q through the cavity opening 2110K. When the sliding rod 2120 is inserted into the sliding cavity 2110Q, it forms a sliding fit with the sliding cavity 2110Q so that it can slide along the sliding cavity 2110Q.

[0196] In some embodiments, referring to Figures 15, 18 to 20, the stop structure 2140 includes:

[0197] The stop 2141 is provided on one of the outer wall of the slide rod 2120 and the inner wall of the slide cavity 2110Q. When the headrest 2130 is subjected to a leaning force, the stop 2141 forms a stop engagement with the other of the outer wall of the slide rod 2120 and the inner wall of the slide cavity 2110Q to restrict the slide rod 2120 in the locked state from sliding on the support member 2110.

[0198] The stopping structure 2140 employs a stopping element 2141. The stopping element 2141 can be located on the outer wall of the slide rod 2120 or on the inner wall of the sliding cavity 2110Q, depending on actual requirements. For example, when the stopping element 2141 is located on the outer wall of the slide rod 2120, it can be a protruding block structure, etc.; when the stopping element 2141 is located on the inner wall of the sliding cavity 2110Q, it can be an elastic protrusion, etc. The stopping element 2141 can be installed in various ways, such as by bonding, embedding, or snap-fitting, onto the corresponding wall surface. The specific method can be selected based on the type of stopping element 2141.

[0199] When the headrest 2130 is subjected to a leaning force, the slide bar 2120 will tend to slide downward relative to the support member 2110. If the stop member 2141 is on the outer wall of the slide bar 2120, with the slight displacement of the slide bar 2120, the stop member 2141 will come into close contact with the inner wall of the slide cavity 2110Q. Due to the special shape of the stop member 2141 (such as the blocking effect of a block shape) or its high frictional characteristics (such as the friction between the block structure and the inner wall of the slide cavity 2110Q), a stop fit is formed, preventing the slide bar 2120 from sliding further. However, if the stop 2141 is located on the inner wall of the sliding cavity 2110Q, for example, as an elastic protrusion, when the slide rod 2120 has a downward sliding tendency, the outer wall of the slide rod 2120 will squeeze the elastic protrusion. The reaction force generated by the elastic protrusion and the friction between it and the outer wall of the slide rod 2120 will restrict the sliding of the slide rod 2120, thereby effectively restricting the sliding of the slide rod 2120 in the locked state on the support member 2110, and ensuring the stability of the headrest 2130 during use.

[0200] The stop 2141 and the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q can form a stop fit in various ways, such as:

[0201] In some embodiments, referring to Figures 15, 21 to 23, the stop member 2141 is used to abut against the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q to form a stop fit. Specifically, when the stop member 2141 is provided on the outer wall of the slide rod 2120, the stop member 2141 abuts against the inner wall of the slide cavity 2110Q to form a stop fit, thereby preventing the slide rod 2120 from sliding on the support member 2110; when the stop member 2141 is provided on the inner wall of the slide cavity 2110Q, the stop member 2141 abuts against the outer wall of the slide rod 2120 to form a stop fit, thereby preventing the slide rod 2120 from sliding on the support member 2110.

[0202] That is, the stop 2141 is designed to abut against the wall to form a stop fit, which is simple in structure and stable in fit. Specifically, when the headrest 2130 is subjected to the force of the user's head and / or neck, the force is transmitted to the slide bar 2120, which will cause the slide bar 2120 to slide downward relative to the support 2110. The stop 2141 then gradually abuts against the wall and generates a large frictional force, preventing the slide bar 2120 from sliding and achieving a reliable stop fit.

[0203] In some other embodiments, referring to Figures 19 and 20, the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q is provided with a plurality of grooves 2142, and the plurality of grooves 2142 are arranged sequentially along the sliding direction of the slide rod 2120.

[0204] The stop 2141 is used to extend into at least one of the plurality of grooves 2142 to form a stop fit.

[0205] Specifically, when the stop 2141 is provided on the outer wall of the slide rod 2120, the inner wall of the slide cavity 2110Q is provided with a plurality of grooves 2142. The stop 2141 extends into the grooves 2142 provided on the inner wall of the slide cavity 2110Q to form a stop fit, thereby preventing the slide rod 2120 from sliding on the support member 2110; when the stop 2141 is provided on the inner wall of the slide cavity 2110Q, the outer wall of the slide rod 2120 is provided with a plurality of grooves 2142. The stop 2141 extends into the grooves 2142 provided on the outer wall of the slide rod 2120 to form a stop fit, thereby preventing the slide rod 2120 from sliding on the support member 2110. Multiple grooves 2142 are arranged sequentially along the sliding direction of the slide rod 2120, so that when the slide rod 2120 and the support member 2110 are locked at different heights, the stop member 2141 can match the aligned grooves 2142 to form a stop fit.

[0206] That is, the stop 2141 adopts a form of concave-convex fit with the wall surface to form a stop fit, which is stable. Specifically, when the headrest 2130 is subjected to the force of the user's head and / or neck, the force is transmitted to the slide bar 2120, which will cause the slide bar 2120 to slide downward relative to the support member 2110. The stop 2141 then extends into the groove 2142 that is aligned with it to form a stop fit, preventing the slide bar 2120 from sliding and achieving a stable stop fit.

[0207] According to the actual structural requirements, the stop 2141 can be designed so that it can cooperate with at least one groove 2142 when the slide bar 2120 is stopped. That is, the stop 2141 can cooperate with one groove 2142, or it can cooperate with several grooves 2142 at the same time.

[0208] Optionally, the number of grooves 2142 can also be one. When only one groove 2142 is provided on the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q, the stop member 2141 can form a stable stop fit with the groove 2142 without relying on multiple grooves.

[0209] In some embodiments, the stop 2141 is an elastic element. The use of an elastic element in the stop 2141 avoids severe friction and collision caused by hard contact during the relative movement between the slide bar 2120 and the support member 2110. Compared to a rigid stop structure 2140, an elastic element can reduce wear between components to a certain extent. For example, when the slide bar 2120 tends to slide, the elastic element will first undergo elastic deformation, rather than directly generating rigid collision and friction as the rigid stop 2141 would.

[0210] The elastic element can take various structural forms. Taking the stop 2141 using an elastic metal sheet as an example, during long-term use, the elastic deformation of the metal sheet can absorb part of the impact force, reducing wear on the outer wall of the slide rod 2120 and the inner wall of the slide cavity 2110Q. Furthermore, the elastic recovery characteristics of the metal sheet itself allow it to maintain a certain stopping function after multiple deformations, extending the service life of the stop structure 2140 and reducing the maintenance cost of the headrest assembly 2100. The elastic element used in the stop 2141 can be directly pressed against a wall surface (such as the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q) to stop the slide rod 2120 in a locked state; or it can be engaged with a groove 2142 provided on the wall surface (such as the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q) to stop the slide rod 2120 in a locked state.

[0211] In some embodiments, referring to Figures 14 to 16, the elastic element is an elastic silicone block 1411; or...

[0212] Referring to Figures 20 and 23, the elastic element is an elastic sheet 1412. The elastic sheet 1412 is constructed with at least one protrusion 1412B. The elastic sheet 1412 forms a stop fit with the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q through the protrusion 1412B.

[0213] In this embodiment, the elastic element can be an elastic silicone block 1411, which can be rectangular in shape. Its material has a high coefficient of friction and a certain elastic deformation capacity. When the elastic silicone block 1411 is located on the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q, it protrudes from the wall surface to effectively abut when stopping is required. Taking the elastic silicone block 1411 located on the inner wall of the slide cavity 2110Q as an example, the inner wall of the slide cavity 2110Q is provided with a mounting groove. The mounting groove is adapted to the outer contour of the elastic silicone block 1411. The elastic silicone block 1411 can be glued and fixed in the mounting groove and protrudes from the inner wall of the slide cavity 2110Q. When the slide rod 2120 has a downward sliding tendency relative to the support member 2110, the elastic silicone block 1411 on the inner wall of the slide cavity 2110Q will contact and be compressed against the outer wall of the slide rod 2120. Due to the excellent elasticity of silicone material, the elastic silicone block 1411 undergoes elastic deformation, generating an elastic restoring force opposite to the direction of compression. Simultaneously, the friction between the elastic silicone block 1411 and the outer wall of the slide bar 2120 increases due to compression. These two factors work together to effectively prevent the slide bar 2120 from sliding, ensuring the stability of the headrest 2130 during use.

[0214] In this embodiment, the elastic element can also be an elastic sheet 1412. The elastic sheet 1412 can be made of a metal material with high elastic modulus and good wear resistance, such as spring steel or stainless steel sheet. The shape of the elastic sheet 1412 is set according to the shape of the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q, and its thickness can be between 0.5mm and 1.5mm to ensure sufficient elasticity and strength. At least one protrusion 1412B is constructed on the elastic sheet 1412. The shape of the protrusion 1412B can be hemispherical, triangular, or trapezoidal, etc., and its height is optimized according to the gap between the slide rod 2120 and the support member 2110 and the force required for stopping, and can be between 1mm and 3mm. When the elastic sheet 1412 is installed on the outer wall of the slide rod 2120, it is firmly attached to the slide rod 2120 by means of welding, riveting or fixing with a slot, so that the protrusion 1412B protrudes towards the inner wall of the slide cavity 2110Q; if it is installed on the inner wall of the slide cavity 2110Q, it is fixed by means of a corresponding mounting seat, slot or adhesive, so that the protrusion 1412B faces the outer wall of the slide rod 2120.

[0215] Under normal conditions, the protrusion 1412B of the elastic piece 1412 maintains a certain gap or forms light contact with the outer wall of the slide rod 2120 or the inner wall of the slide cavity 2110Q to ensure that the slide rod 2120 can slide smoothly to adjust the height of the headrest 2130. However, when the slide rod 2120 is subjected to external force, such as when the headrest 2130 tends to shift due to the occupant's head resting against it, the slide rod 2120 will tend to slide relative to the support member 2110. Taking the elastic plate 1412 installed on the inner wall of the slide cavity 2110Q as an example, when the slide rod 2120 is subjected to external force, such as when the head of the driver or passenger leans against it or when the vehicle bumps and causes the headrest 2130 to have a tendency to shift, the slide rod 2120 will have a downward sliding tendency relative to the support member 2110. The outer wall of the slide rod 2120 presses the protrusion 1412B of the elastic plate 1412, which will also cause the protrusion 1412B to undergo elastic deformation, thereby generating a reaction force and friction force to prevent the slide rod 2120 from sliding, achieving a reliable stop fit and ensuring the high stability of the headrest 2130 during use.

[0216] In some embodiments, referring to Figures 15 to 17 and Figure 23, an elastic buckle 210 is provided on one of the outer wall of the slide rod 2120 and the inner wall of the slide cavity 2110Q, and a plurality of slots 220 are provided on the other of the outer wall of the slide rod 2120 and the inner wall of the slide cavity 2110Q. The plurality of slots 220 are arranged sequentially along the sliding direction of the slide rod 2120, and the elastic buckle 210 is used to engage with the slots 220 to lock the slide rod 2120.

[0217] In this embodiment, the outer wall of the slide rod 2120 may be provided with an elastic buckle 210, and the inner wall of the slide cavity 2110Q may be provided with multiple slots 220; or, the inner wall of the slide cavity 2110Q may be provided with an elastic buckle 210, and the outer wall of the slide rod 2120 may be provided with multiple slots 220. The specific configuration can be determined according to actual needs.

[0218] Taking the elastic buckle 210 disposed on the inner wall of the slide cavity 2110Q as an example, the elastic buckle 210 can be a protruding elastic metal sheet or an elastic pin structure, which is fixed to a specific position on the inner wall of the slide cavity 2110Q by means of riveting, welding or integral molding. The slot 220 is disposed on the outer wall of the slide rod 2120 and is evenly distributed sequentially along the sliding direction of the slide rod 2120. The shape and size of the slot 220 are set according to the shape and size of the elastic buckle 210 to ensure that the elastic buckle 210 can be accurately engaged in the slot 220 and achieve stable locking. For example, if the elastic buckle 210 is a hemispherical elastic pin, the slot 220 can be designed as a matching retaining groove. The edge of the retaining groove can be appropriately rounded so that the elastic pin moves smoothly during the engagement and disengagement process.

[0219] When the elastic buckle 210 uses an elastic metal sheet, as shown in FIG10 in conjunction with the aforementioned embodiment, the elastic buckle 210 and the stop member 2141, which also uses an elastic sheet 1412, can be integrally formed. The elastic buckle 210 has a retaining portion 211 that engages with the slot 220, and the protrusion 1412B of the elastic sheet 1412 is configured to engage with the slot 220 for a stop. The protruding length of the protrusion 1412B of the elastic sheet 1412 is less than the extending length of the retaining portion 211 of the elastic buckle 210. Thus, in the normal locking state, the retaining portion 211 of the elastic buckle 210 engages with the slot 220 to lock the slide bar 2120, while the protrusion 1412B of the elastic sheet 1412 either does not extend into other slots 220, or extends into other slots 220 and maintains a certain gap or forms light contact with the slot wall of the slot 220. Taking the elastic metal sheet, which is designed to integrate the elastic buckle 210 and the stop 2141, and installed on the inner wall of the slide cavity 2110Q as an example, when the slide rod 2120 is subjected to external force, such as when the head of the driver or passenger leans against the headrest 2130 or when the vehicle bumps and exerts a force on the headrest 2130 towards the rear of the seat, causing the headrest 2130 to have a tendency to displace, the slide rod 2120 will have a downward sliding tendency relative to the support 2110 and will contact the support 2110 backward. The protrusion 1412B of the elastic sheet 1412 extends into the corresponding slot 220, and the groove wall of the slot 220 squeezes the protrusion 1412B of the elastic sheet 1412. The protrusion 1412B of the elastic sheet 1412 and the slot 220 are tightly engaged to generate a reaction force and friction force to prevent the slide rod 2120 from sliding, thereby achieving a reliable stop engagement and ensuring the high stability of the headrest 2130 during use.

[0220] During the height adjustment of the headrest 2130, the user can apply external force to the slide rod 2120, causing the slide rod 2120 to slide within the slide cavity 2110Q of the support member 2110. When the headrest 2130 reaches the desired height position, the elastic buckle 210 on the inner wall of the slide cavity 2110Q automatically engages with the corresponding slot 220 on the outer wall of the slide rod 2120 under its own elastic restoring force, thereby locking the slide rod 2120.

[0221] In some embodiments, referring to Figures 14 and 15, the stop structure 2140 is located behind the slide bar 2120 along the front-back direction of the headrest 2130. This position of the stop structure 2140 is designed based on considerations of the direction of force transmission and the point of application when the user's head and / or neck rests against the headrest 2130. Specifically, when the user's head and / or neck rests against the headrest 2130, the headrest 2130 is subjected to a backward leaning force, and the rear surface of the slide bar 2120 directly presses against the support member 2110. At this time, the stop structure 2140 located behind the slide bar 2120 can more directly and effectively play a stopping role, resisting the downward sliding tendency of the slide bar 2120. Compared with other positions, this position layout can respond to external forces more quickly and accurately, improving the timeliness and reliability of the stop.

[0222] And / or, in some embodiments, referring to FIG16, the support member 2110 is provided with an opening 2110K communicating with the sliding cavity 2110Q, and the stop structure 2140 is provided at the position of the opening 2110K. Specifically, when the stop structure 2140 is provided on the support member 2110, the stop structure 2140 is located inside the sliding cavity 2110Q and at the position of the opening 2110K. When the headrest 2130 is subjected to a leaning force, it will be transmitted to the slide rod 2120 accordingly. The slide rod 2120 then presses the support member 2110 backward in the sliding cavity 2110Q. The position of the opening 2110K is the direct / main force-bearing position of the slide rod 2120. Therefore, by providing the stop structure 2140 at the position of the opening 2110K, the stop structure 2140 can act more directly on the slide rod 2120, reducing the stopping delay and making the stopping more timely and efficient. Furthermore, since the space at the cavity 2110K is relatively open, it is convenient to inspect and replace the stop structure 2140 during later maintenance. If the stop structure 2140 is damaged or worn, maintenance personnel can operate directly from the cavity 2110K without having to disassemble the entire headrest assembly 2100 on a large scale, thus reducing maintenance costs and time.

[0223] In some embodiments, referring to Figures 20, 24 and 25, the outer wall of the slide rod 2120 is provided with an elastic anti-detachment member 30, and the inner wall of the slide cavity 2110Q is provided with an anti-detachment groove 40. The elastic anti-detachment member 30 can be used to lock into the anti-detachment groove 40 when the slide rod 2120 slides up to the limit position in the slide cavity 2110Q to prevent the slide rod 2120 from leaving the slide cavity 2110Q.

[0224] The outer wall of the support member 2110 is provided with a clearance hole 50 that communicates with the anti-detachment groove 40. The clearance hole 50 is used to allow a tool to be inserted to push the elastic anti-detachment member 30 out of the anti-detachment groove 40.

[0225] In this embodiment, the slide rod 2120 slides up and down relative to the support member 2110 within the slide cavity 2110Q to adjust the height of the headrest 2130. When the slide rod 2120 slides upward to its limit position within the slide cavity 2110Q, the elastic anti-detachment member 30 on the outer wall of the slide rod 2120 engages with the anti-detachment groove 40 under its own elastic force. Due to the tight fit between the elastic anti-detachment member 30 and the anti-detachment groove 40, and the elastic force of the elastic anti-detachment member 30, the slide rod 2120 can be effectively restricted from continuing to move upward, thereby preventing the slide rod 2120 from detaching from the slide cavity 2110Q. As an example, the elastic anti-detachment member 30 can be an elastic protrusion formed on the outer wall of the slide rod 2120, and the anti-detachment groove 40 is a matching groove. When the slide bar 2120 reaches its limit position, the elastic protrusion is engaged in the groove under the action of elastic force. The inner wall of the groove generates friction and resistance on the elastic protrusion, ensuring that the slide bar 2120 will not accidentally come out, thus ensuring the safety of the headrest 2130 during use.

[0226] When it is necessary to disassemble the headrest 2130 and remove the slide rod 2120 from the slide cavity 2110Q of the support member 2110, the user can use a tool, such as a slender rod, to insert into the anti-detachment groove 40 through the clearance hole 50. Then, the user applies an inward pushing force to the elastic anti-detachment member 30, causing it to elastically deform and thus exit from the anti-detachment groove 40. Once the elastic anti-detachment member 30 exits the anti-detachment groove 40, the slide rod 2120 can move freely, and can then be removed from the slide cavity 2110Q of the support member 2110, realizing the modular disassembly of the headrest assembly 2100, which is beneficial for transportation and packaging.

[0227] Example 4

[0228] This application also proposes a seat, referring to FIG26, which includes a seat body 200, a backrest support 300 disposed on the seat body 200, and a headrest assembly 2100 as described in Embodiment 3 above. A support member 2110 is connected to the backrest support 300. The specific structure of the headrest assembly 2100 is as described in the above embodiments. Since this seat adopts all the technical solutions of all the above embodiments, it possesses at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The seat body 200 includes a base, a seat cushion, and a backrest. The seat cushion is disposed on the base for a user to sit on. The backrest is disposed on the rear side of the seat cushion and connected to the base for a user to lean against. The backrest support 300 is disposed on the rear side of the backrest and provides support for the backrest.

[0229] The above description is only a part or optional embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A headrest assembly, characterized in that, include: First support; The mounting bracket is slidably connected to the first bracket; The headrest is connected to the mounting bracket; The first locking structure includes a first slide block, a first retaining member, and a second retaining member. The first slide block is slidably disposed on one of the first bracket and the mounting bracket. The second retaining member is disposed on the other of the first bracket and the mounting bracket. The first retaining member is movably disposed on the first slide block and is linked to the first slide block. The second retaining member is disposed opposite to the first retaining member. Specifically, by sliding the first slide block, the first holding member is driven to move toward the second holding member to form a holding engagement with the second holding member to lock the mounting bracket, or the first holding member is driven to move away from the second holding member to cancel the holding engagement with the second holding member to unlock the mounting bracket.

2. The headrest assembly according to claim 1, characterized in that, The first bracket or the mounting bracket is provided with a first sliding groove, and the first slide block is located in the first sliding groove and can slide relative to the first sliding groove; A first guide structure is provided between the first holding member and the first sliding groove. The first guide structure includes a first guide shaft and a first guide groove. The first guide shaft is disposed on one of the side wall of the first holding member and the groove wall of the first sliding groove, and the first guide groove is disposed on the other of the side wall of the first holding member and the groove wall of the first sliding groove. The first guide shaft passes through the first sliding block and extends into the first guide groove. Wherein, the first guide slide shaft slides relative to the first guide groove when the first slide block slides, so as to drive the first holding member to move toward or away from the second holding member.

3. The headrest assembly according to claim 2, characterized in that, The first slide block is provided with an inclined groove through which the first guide slide shaft passes, and the first guide slide shaft forms a contact fit with the groove wall of the inclined groove; Wherein, the extension direction of the first guide groove is the same as the movement direction of the first clamping member, and the extension direction of the inclined groove has an angle with the movement direction of the first clamping member.

4. The headrest assembly according to claim 2, characterized in that, The number of the first guide structures is one set, and one set of the first guide structures is located on one side of the first holding member; or, The number of the first guide structures is two sets. One set of the first guide structures is located on one side of the first clamping member, and the other set of the first guide structures is located on the other side of the first clamping member. The two sets of the first guide structures are positioned opposite each other.

5. The headrest assembly according to any one of claims 1 to 4, characterized in that, One of the first and second holding members is provided with a first holding tooth, and the other of the first and second holding members is provided with a first holding groove. The number of at least one of the first holding teeth and the first holding groove is multiple and they are arranged sequentially along the sliding direction of the first slide. The first locking tooth is used to engage with the first locking slot when the first locking member moves toward the second locking member so that the first locking member and the second locking member form a locking engagement, or to disengage from the first locking slot when the first locking member moves away from the second locking member so that the locking engagement between the first locking member and the second locking member is canceled.

6. The headrest assembly according to claim 5, characterized in that, The first slot is an oblique slot, and the first tooth is an oblique tooth adapted to the oblique slot. The first slot forms a stop on the first tooth to restrict the first holding member from sliding relative to the second holding member in a first direction, and the first tooth can exit the first slot when the first holding member slides relative to the second holding member in a second direction, wherein the second direction is opposite to the first direction.

7. The headrest assembly according to any one of claims 1 to 4, characterized in that, Also includes: A first actuating structure is connected to the first slide block, and the first actuating structure is used to drive the first slide block to slide.

8. The headrest assembly according to claim 7, characterized in that, The first actuating structure includes: The first pull wire is connected to the first slide block; A first wired switch is disposed on the headrest and connected to the first pull cord. The first wired switch is used to pull the first pull cord to drive the first slide block to slide. A reset element acts on the first slide block, and the reset element is used to provide a force to reset the first slide block.

9. The headrest assembly according to any one of claims 1 to 4, characterized in that, Also includes: The second bracket is slidably connected to the first bracket, and the direction in which the first bracket slides relative to the second bracket is different from the direction in which the mounting bracket slides relative to the first bracket. The second locking structure includes a second slide, a third retainer and a fourth retainer. The second slide is slidably disposed on one of the second bracket and the first bracket. The fourth retainer is disposed on the other of the second bracket and the first bracket. The third retainer is movably disposed on the second slide and is linked to the second slide. The fourth retainer and the third retainer are disposed opposite to each other. Wherein, by sliding the second slide block, the third holding member is driven to move toward the fourth holding member to form a holding engagement with the fourth holding member to lock the first bracket, or the third holding member is driven to move away from the fourth holding member to cancel the holding engagement with the fourth holding member to unlock the first bracket; The second slide is linked to the first slide, and when one of the first slide and the second slide slides, it drives the other slides synchronously.

10. The headrest assembly according to claim 9, characterized in that, Also includes: A first actuating structure is connected to the first slide block, and the first actuating structure is used to drive the first slide block to slide. or, The second actuating structure is connected to the second slide block, and the second actuating structure is used to drive the second slide block to slide.

11. The headrest assembly according to claim 9, characterized in that, Also includes: A linkage rod is provided inside the first bracket. One end of the linkage rod is connected to the first slide block, and the other end of the linkage rod is connected to the second slide block. When one of the first slide block and the second slide block slides, the other slides synchronously through the linkage rod.

12. A type of seat, characterized in that, It includes a seat body and a headrest assembly as described in any one of claims 1 to 11, the headrest assembly being disposed on the seat body.

13. A headrest assembly, characterized in that, include: Support components; The slide rod is slidably connected to the support member; A headrest is located in front of and connected to the slide rod; The slide bar can slide up and down relative to the support member and lock to adjust the height of the headrest; At least one of the sliding rod and the support member is provided with a stop structure, which is used to restrict the sliding rod in the locked state from sliding on the support member when the headrest is subjected to a leaning force.

14. The headrest assembly according to claim 13, characterized in that, The support member is provided with a sliding cavity, and the sliding rod is inserted into the sliding cavity to be slidably connected with the support member.

15. The headrest assembly according to claim 14, characterized in that, The stop structure includes: A stop is provided on one of the outer wall of the slide rod and the inner wall of the slide cavity. When the headrest is subjected to a leaning force, the stop engages with the other of the outer wall of the slide rod and the inner wall of the slide cavity to restrict the slide rod in the locked state from sliding on the support.

16. The headrest assembly according to claim 15, characterized in that, The stop is used to abut against the outer wall of the slide rod or the inner wall of the slide cavity to form the stop fit.

17. The headrest assembly according to claim 15, characterized in that, The outer wall of the slide rod or the inner wall of the slide cavity is provided with a plurality of grooves, and the plurality of grooves are arranged sequentially along the sliding direction of the slide rod; The stop is used to extend into at least one of the plurality of grooves to form the stop fit.

18. The headrest assembly according to any one of claims 15 to 17, characterized in that, The stop is an elastic element.

19. The headrest assembly according to claim 18, characterized in that, The elastic element is an elastic silicone block; or... The elastic element is an elastic sheet, which has at least one protrusion. The elastic sheet forms a stop fit with the outer wall of the slide rod or the inner wall of the slide cavity through the protrusion.

20. The headrest assembly according to claim 14, characterized in that, An elastic buckle is provided on one of the outer wall of the slide rod and the inner wall of the slide cavity, and a plurality of slots are provided on the other of the outer wall of the slide rod and the inner wall of the slide cavity. The plurality of slots are arranged sequentially along the sliding direction of the slide rod, and the elastic buckle is used to engage with the slot to lock the slide rod.

21. The headrest assembly according to claim 14, characterized in that, Along the front-rear direction of the headrest, the stop structure is located on the rear side of the slide rod; and / or, The support member has an opening that communicates with the sliding cavity, and the stop structure is located at the opening.

22. The headrest assembly according to claim 14, characterized in that, The outer wall of the slide rod is provided with an elastic anti-detachment component, and the inner wall of the slide cavity is provided with an anti-detachment groove. The elastic anti-detachment component can be used to lock into the anti-detachment groove when the slide rod slides up to the limit position in the slide cavity to prevent the slide rod from detaching from the slide cavity. The outer wall of the support member is provided with a clearance hole that communicates with the anti-detachment groove. The clearance hole is used to allow a tool to be inserted to push the elastic anti-detachment member out of the anti-detachment groove.

23. A type of seat, characterized in that, The seat includes a seat body, a backrest support disposed on the seat body, and a headrest assembly as described in any one of claims 13 to 22, wherein the support member is connected to the backrest support.

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