Chair

Abstract

SOLUTION: A chair, comprising a base 100, a backrest frame 200 rotatably connected to the base 100 and connected to a backrest 500, a sliding member 300 slidably arranged on the backrest frame 200, and a headrest 400 arranged on the sliding member 300, wherein when the backrest frame 200 rotates, the sliding member 300 slides on the backrest frame 200 to drive the headrest 400 to move.EFFECT: When the body leans backward against the backrest 500, the backrest 500 and the backrest frame 200 rotate relative to the base 100, and the sliding member 300 slides on the backrest frame 200 to actuate the headrest 400. In this way, the headrest 400 can always follow the head and / or neck of the user to provide sufficient support, thereby helping to improve the comfort of the user.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of chairs, and in particular to chairs. [Background technology]

[0002] Chairs are commonly found in places such as offices and study rooms, and can meet the needs of people sitting to work, study, or rest. Generally, chairs have components such as a base, a backrest, a seat cushion, and a headrest, and when a user uses the chair, the user can naturally rest their head and / or neck on the headrest, which can provide support for the head and neck.

[0003] In related art, the headrest is fixed to the backrest. When a user sits in a chair and leans back, the headrest rotates backward along with the backrest. However, the relative position of the headrest and backrest remains unchanged, resulting in a loss of or inadequate support for the user's head and / or neck. This results in poor overall comfort. Furthermore, as the backward tilt angle increases during this process, the user's line of sight shifts from horizontal to upward, making it difficult to work in a reclined position. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a chair that further improves the comfort of the user when sitting in the chair, and when the user leans back in the chair, the user's line of sight is always kept horizontal, allowing the user to work in a backward-leaning position. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention provides a chair including the following configuration, wherein the chair comprises: base, a backrest frame pivotally connected to the base and connected to the backrest; A sliding member slidably mounted on the backrest frame; and a headrest installed on the sliding member; When the back frame rotates, the sliding member slides against the back frame to move the headrest.

[0006] In one embodiment, the back frame is provided with a slide cavity extending in the longitudinal direction thereof, and the slide member is inserted into the slide cavity and slidably cooperates with the slide cavity.

[0007] In one embodiment, at least one of the backrest frame and the sliding member is provided with a sliding structure, which supports the sliding member to slide along the sliding cavity.

[0008] In one embodiment, when the sliding structure is provided on the backrest frame, the sliding structure includes at least one support member that is rotatably protruded from the inner wall of the sliding cavity and forms rolling contact with the sliding member.

[0009] In one embodiment, a slide groove extending along the longitudinal direction of the outer wall of the sliding member is formed, and the support body is accommodated in the slide groove and forms rolling contact with a bottom wall of the slide groove.

[0010] In one embodiment, a guide boss is provided on one of the outer wall of the sliding member and the inner wall of the sliding cavity, and a guide groove is provided on the other. The guide boss is inserted into the guide groove and slidably installed, thereby guiding the sliding member to slide along the sliding cavity.

[0011] In one embodiment, the sliding member is fitted onto the back frame so as to be slidable thereon.

[0012] In one embodiment, the backrest frame is provided with an arc-shaped slide rail, and the sliding member is slidably engaged with the arc-shaped slide rail to move the headrest along the arc-shaped slide rail.

[0013] In one embodiment, the headrest is pivotably mounted.

[0014] In one embodiment, the chair further comprises: a drive member connected to the headrest; The driving member drives the headrest to rotate when the backrest frame rotates.

[0015] In one embodiment, the chair further comprises: a backrest connected to the sliding member; When the backrest frame rotates, the backrest rotates with the backrest frame, causing the sliding member to slide with the backrest frame.

[0016] In one embodiment, the sliding member is provided with a backrest connection, and the sliding member is hinged to the backrest via the backrest connection.

[0017] In some embodiments, The chair further includes a rotating member spaced apart from the sliding member in the longitudinal direction of the chair, one end of which is rotatably connected to the backrest frame and the other end of which is connected to the backrest for transmission coupling.

[0018] In one embodiment, the chair further comprises: a transmission unit connected to the sliding member and power-transmittingly connected to the base or a seat cushion of a chair; The transmission unit drives the sliding member to slide on the backrest frame when the backrest frame rotates.

[0019] In one embodiment, the transmission unit includes a link unit whose one end is hinged to the sliding member and whose other end is transmission-connected to the base or a seat cushion of a chair; And / or, the transmission unit includes a connecting rope, one end of which is connected to the sliding member and the other end of which is connected to the base or the seat cushion of the chair.

[0020] In one embodiment, the backrest frame includes a backrest support portion that supports the backrest and a base connection portion that is rotatably connected to the base, The sliding member is slidably mounted on the backrest support portion. [Effects of the Invention]

[0021] The chair of this embodiment is equipped with a sliding member, which allows the headrest to slide relative to the backrest frame and moves in conjunction with the rotation of the backrest frame. When a user sits in the chair and leans back against the backrest, the backrest and backrest frame rotate relative to the base, and the sliding member slides (e.g., slides downward) on the backrest frame to move the headrest (e.g., slides downward). This allows the headrest to always follow the user's head and / or neck and provide sufficient support, contributing to improved comfort for the user. Furthermore, the support angle of the headrest relative to the user's head and neck remains almost constant, allowing the user's line of sight to always be horizontal and working in a reclined position. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a structural schematic diagram of a chair according to an embodiment of the present invention; [Figure 2] FIG. 2 is a structural schematic diagram of a part of the chair in the embodiment of FIG. 1. [Figure 3] FIG. 2 is a structural schematic diagram of the back frame of the chair in the embodiment of FIG. 1. [Figure 4] 2 is a structural schematic diagram of a sliding member of the chair in the embodiment of FIG. 1. FIG. [Figure 5]FIG. 10 is a structural schematic diagram of a part of a chair in another embodiment of the present invention. [Figure 6] FIG. 10 is a structural schematic diagram of a chair according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are all within the scope of the protection sought by the present application.

[0024] It should be noted that all directional indications (e.g., up, down, left, right, front, back, etc.) in the embodiments of the present invention merely describe the relative positional relationships, movement conditions, etc. between each member in a specific posture (as shown in the drawings), and when this specific posture changes, the directional indications also change accordingly.

[0025] It should be noted that when an element is referred to as being "fixed" or "mounted" on another element, it may be directly on the other element or may be fixed to the other element through another element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may be connected to the other element through another element.

[0026] Furthermore, the terms "first" and "second" in the present invention are used for descriptive purposes only and should not be construed as indicating the relative importance or the number of the indicated technical features. Therefore, a feature defined by the terms "first" and "second" may explicitly or implicitly include at least one of the features. Furthermore, the technical solutions in each embodiment may be combined with each other, provided that such combination is feasible by a person of ordinary skill in the art. If a contradiction or impossibility arises in the combination of technical solutions, such combination of technical solutions will be deemed non-existent and will not fall within the scope of protection of the present invention.

[0027] Chairs are devices on which people sit while working, studying, or resting, and chair technology is evolving in a more people-friendly and intelligent direction, aiming to provide users with a comfortable and healthy sitting experience.

[0028] An embodiment of the present invention provides a chair including the following components, the chair comprising: Base 100, a backrest frame 200 pivotally connected to the base 100 and connected to the backrest 500; a sliding member 300 slidably installed on the backrest frame 200; and A headrest 400 is provided on the sliding member 300, When the back frame 200 rotates, the sliding member 300 slides against the back frame 200 to move the headrest 400 .

[0029] In this embodiment, the base 100 (also called the chassis) is the foundation of the chair structure, and is strong and stable enough to support the weight of the human body and various pressures generated during use. The base 100 is also an important part that connects the chair body (backrest, seat cushion, etc.), and each part is combined using a specific connection method (e.g., fixed connection, pivot connection, etc.) to form the complete chair structure.

[0030] The backrest frame 200 may be installed behind the base 100 and cooperates with the backrest 500 to support the back and / or lower back of the human body. The backrest frame 200 has a generally rod-like outer shape extending along the longitudinal direction of the chair. Its shape can be variously set according to structural requirements, such as an arc, an S-shape, or an L-shape. To ensure sufficient support strength, the backrest frame 200 may be made of a material such as metal (steel, aluminum alloy, etc.) or plastic. The backrest frame 200 may be installed integrally with the backrest 500, for example, by penetrating the backrest 500, or may be connected to the backrest 500 to support it. When the front-rear and left-right directions of the chair are taken as reference directions, the backrest 500 is located in front of the backrest frame 200 and is connected to the backrest frame 200. Furthermore, when the backrest frame 200 and the base 100 are assembled, the backrest frame 200 is rotatably connected to the base 100 via the lower part of the backrest frame 200. When a user sits in the chair, the user can lean their back and / or lumbar region against the backrest 500, and the backrest frame 200 supports the back or lumbar region accordingly. Furthermore, when transitioning from a seiza (sit-up) position to a leaning back or reclining position, the backrest frame 200 rotates accordingly to accommodate the user's sitting position. In this embodiment, the backrest frame 200 may be called a chair back frame, an interlocking frame, or the like, depending on its function, and these names are not particularly limited.

[0031] The sliding member 300 is attached to the backrest frame 200 and is slidably disposed relative to the backrest frame 200. Specifically, the sliding member 300 may adopt structural forms such as a sliding rod, a sliding cylinder, a sliding base, or a sliding frame, and is slidably disposed on the backrest frame 200 by sliding cooperation with the backrest frame 200. In the backrest frame 200, the sliding member 300 may be disposed on the upper part of the backrest frame 200, and is disposed to correspond to the upper half of the backrest 500 (considered to be the part of the backrest 500 that supports the back of the human body). Here, the role of the sliding member 300 includes supporting and sliding other components of the chair (such as the headrest 400).

[0032] The headrest 400 is for supporting the head and / or neck of a human body and may include a headrest framework, a headrest lining, and a headrest cover. The headrest framework is supported by metal or high-strength plastic, providing support and structural stability to the headrest 400. The headrest lining may be made of a soft foam material, such as urethane foam, to provide comfortable support and cushioning for the head. The headrest cover is for covering the headrest framework and lining and may be made of fabric, leather, or other comfortable materials, providing a comfortable feel and a beautiful appearance. Furthermore, the headrest 400 may be equipped with adjustment mechanisms such as height adjustment and angle adjustment, allowing for seating comfort tailored to the needs of different users. When a person sits in a chair, the head and / or neck can be leaned against the headrest 400, and the headrest 400 supports the head and / or neck accordingly.

[0033] Here, the headrest 400 is attached to the sliding member 300, and when the backrest frame 200 rotates, the sliding member 300 slides on the backrest frame 200 to move the headrest 400. The backrest frame 200, the sliding member 300, and the headrest 400 are provided with a mutually cooperating operating mechanism. When an external force is applied to the backrest frame 200 to rotate, the sliding member 300 not only rotates together with the backrest frame 200 but also slides relative to the backrest frame 200 at the same time, moving the headrest 400.

[0034] The sliding member 300 can slide on the backrest frame 200 as the backrest frame 200 rotates. For example, when a user leans against the headrest 400, the force applied to the headrest 400 is transmitted to the sliding member 300 and the backrest frame 200, causing the backrest frame 200 to rotate backward and the sliding member 300 to slide on the backrest frame 200, thereby moving the headrest 400.

[0035] Furthermore, when the sliding member 300 is connected to the backrest 500 and the user leans back while leaning on the backrest 500, a force applied to the backrest 500 increases, and this force is transmitted synchronously to the sliding member 300 and the backrest frame 200, causing the backrest frame 200 to rotate and the sliding member 300 to slide on the backrest frame 200, thereby moving the headrest 400. Alternatively, a transmission structure may be disposed based on the sliding member 300 and connected between the sliding member 300 and the base 100 or the seat cushion 700. When the backrest frame 200 rotates backward, the transmission unit works in conjunction with the sliding member 300; specifically, by pulling the sliding member 300, the sliding member 300 slides on the backrest frame 200 to move the headrest 400.

[0036] Furthermore, the chair may include a drive mechanism, the drive mechanism comprising: A detection unit such as an angle sensor or an encoder that monitors the rotation state of the backrest frame 200; a drive unit, such as a motor, that supplies a drive force based on the detection data of the detection unit; and The drive unit is a transmission unit such as a rack, pinion, chain, or belt that transmits the power of the drive unit to the sliding member 300 to cause the sliding member 300 to slide.

[0037] The chair of this embodiment is provided with a sliding member 300, which allows the headrest 400 to slide relative to the backrest frame 200 and moves in conjunction with the rotation of the backrest frame 200. When a user sits in the chair and leans back against the backrest 500, the backrest 500 and the backrest frame 200 rotate relative to the base 100, and the sliding member 300 slides (e.g., slides downward) on the backrest frame 200 to move the headrest 400 (e.g., slides downward). This allows the headrest 400 to constantly follow the user's head and / or neck and provide sufficient support, contributing to improved comfort for the user. Furthermore, the support angle of the headrest 400 relative to the user's head and neck remains almost constant, allowing the user's line of sight to always be horizontal and working in a reclined position.

[0038] Furthermore, when the user returns from a backward leaning posture to an upright sitting posture, the backrest 500 and the backrest frame 200 rotate relative to the base 100 (the backrest frame 200 may be provided with a restoring means, and the backrest frame 200 may rotate and restore itself by the force of the restoring means). At this time, the sliding member 300 slides (e.g., slides upward) on the backrest frame 200 to move (e.g., slides upward) the headrest 400, which continues to follow the head and / or neck and provides sufficient support continuously.

[0039] That is, whether the user leans back on the chair or returns to a sitting position from a leaning back position, the headrest 400 slides on the backrest frame 200 via the sliding member 300 and adjusts its position and / or angle accordingly, thereby always following and supporting the user's head and / or neck and keeping the user's line of sight always horizontal.

[0040] In one embodiment, as shown in Figures 2 and 3, the backrest frame 200 is provided with a sliding cavity Q extending in its longitudinal direction (vertical direction), and the sliding member 300 is inserted into the sliding cavity Q and slidably cooperates with the sliding cavity Q.

[0041] The sliding cavity Q provided in the backrest frame 200 is compatible with the sliding member 300, and the sliding member 300 is inserted into the sliding cavity Q to be slidably installed relative to the backrest frame 200. The sliding member 300 can be configured as a sliding rod, for example. As shown in FIG. 3, the sliding cavity Q is located at the top of the backrest frame 200, and a cavity opening Qk communicating with the sliding cavity Q is formed at the top end of the backrest frame 200. The cavity opening Qk is compatible with the outer contour of the sliding member 300, and the sliding member 300 is inserted into the sliding cavity Q through the cavity opening Qk. The extension length of the sliding cavity Q is not particularly limited and can be set according to actual needs.

[0042] When the backrest frame 200 rotates, the sliding member 300 slides along the sliding cavity Q. For example, when a user sits on the chair and leans back, the backrest frame 200 rotates backward on the base 100, and at this time, the sliding member 300 slides downward along the sliding cavity Q of the backrest frame 200 (the sliding member 300 continues to retract into the sliding cavity Q at the cavity opening Qk), thereby lowering the headrest 400 and adjusting its position and / or angle. Alternatively, when the user returns from a leaning back posture to an upright sitting posture, the backrest frame 200 rotates forward on the base 100, and at this time, the sliding member 300 slides upward along the sliding cavity Q (gradually protruding out of the sliding cavity Q from the cavity opening Qk), thereby raising the headrest 400 and adjusting its position and / or angle.

[0043] The sliding member 300 is inserted into a sliding cavity Q formed in the backrest frame 200, and is installed so as to be slidable relative to the backrest frame 200. This arrangement does not require additional space in the thickness direction in the front-to-back direction of the chair, nor does it require additional space in the width direction in the left-to-right direction.

[0044] In an embodiment, a sliding structure is provided on at least one of the back frame 200 and the sliding member 300. The sliding structure supports the sliding member 300 to slide along the sliding cavity Q.

[0045] The sliding member 300 slides along the sliding cavity Q while being supported by the sliding structure. The sliding structure may be provided on the backrest frame 200, on the sliding member 300, or on both.

[0046] The sliding structure may have various configurations, such as a configuration including a sliding groove. A portion of the sliding member 300 may be accommodated in the sliding groove, and the sliding member 300 may slide while being supported by the sliding groove. Note that the above is merely an example and does not limit the present disclosure. In a specific application, when a sliding structure is provided on either the backrest frame 200 or the sliding member 300, the configuration of the sliding structure is not limited to one configuration and can be appropriately selected as needed.

[0047] The sliding member 300 can slide smoothly along the sliding cavity Q due to the support of the sliding structure, which contributes to improving the operational stability of the sliding system of the headrest 400.

[0048] In one embodiment, referring to FIG. 3, when a sliding structure is provided on the backrest frame 200, the sliding structure includes at least one support 10 that is rotatably protruded from the inner wall of the sliding cavity Q and forms rolling contact with the sliding member 300.

[0049] The sliding structure employs a support 10, which is rotatably attached to the backrest frame 200, disposed on the inner wall of the sliding cavity Q, and in contact with the sliding member 300. At least one support 10 is provided, and there may be one, or more than one, such as two or three. When multiple supports 10 are provided, they are disposed at predetermined intervals along the circumferential, horizontal, or vertical directions of the backrest frame 200. The support 10 includes, for example, a support wheel, to which a mounting shaft is connected. A mounting groove is formed on the inner wall of the sliding cavity Q, and at least a portion of the support wheel is received in the mounting groove and rotatably installed on the inner wall of the sliding cavity Q via the mounting shaft.

[0050] When the sliding member 300 slides along the sliding cavity Q, the support 10 in contact with the sliding member 300 rotates accordingly (if the sliding member 300 is a stationary system, the support 10 rolls along the surface of the sliding member 300), thereby supporting the sliding of the sliding member 300. The rolling of the support 10 on the backrest frame 200 significantly reduces the frictional resistance with the sliding member 300, allowing the sliding member 300 to perform a lighter and smoother sliding operation.

[0051] In a corresponding embodiment, when the sliding member 300 is provided with a sliding structure, the sliding structure also includes at least one support 10, which is rotatably protruded from the outer wall of the sliding member 300 and forms rolling contact with the back frame 200. The specific structural arrangement, operating principle and effects achieved can be referred to the above-mentioned embodiments, and will not be described again here.

[0052] In one embodiment, referring to FIG. 4 , a sliding groove 20 extending along the longitudinal direction (vertical direction) is formed on the outer wall of the sliding member 300, and the support 10 is received in the sliding groove 20, forming rolling contact with the bottom wall of the sliding groove 20. The number of sliding grooves 20 and the number of support bodies 10 may be the same or different. For example, a plurality of support bodies 10 may be provided, spaced apart along the circumferential or lateral direction of the backrest frame 200, and a corresponding plurality of sliding grooves 20 may be provided, with each support body 10 received in a corresponding sliding groove 20. Alternatively, a plurality of support bodies 10 may be provided, spaced apart along the vertical direction of the backrest frame 200, and only one sliding groove 20 may be provided, or all of the support bodies 10 may be received in the sliding groove 20. Note that the above is merely an example and does not limit the present disclosure.

[0053] When the sliding member 300 slides along the sliding cavity Q, the support 10, which is in contact with the bottom wall of the sliding groove 20, rotates in the sliding groove 20 accordingly (if the sliding member 300 is a stationary system, it rolls along the bottom wall of the sliding groove 20), thereby supporting the sliding of the sliding member 300. The sliding groove 20 provides a clear movement trajectory for the support 10, ensuring that the support 10 moves in a predetermined direction, thereby realizing highly accurate guiding of the sliding member 300.

[0054] 3 and 4, in one embodiment, a guide boss 30 is provided on one of the outer wall of the sliding member 300 and the inner wall of the sliding cavity Q, and a guide groove 40 is provided on the other. The guide boss 30 is inserted into the guide groove 40 to slidably cooperate with each other, thereby guiding the sliding of the sliding member 300 along the sliding cavity Q.

[0055] In this embodiment, a guide boss 30 may be provided on the outer wall of the sliding member 300, and a guide groove 40 may be provided on the inner wall of the sliding cavity Q to slidably cooperate with the guide boss 30. Alternatively, a guide boss 30 may be provided on the inner wall of the sliding cavity Q, and a guide groove 40 may be provided on the outer wall of the sliding member 300 to slidably cooperate with the guide boss 30. The guide structure consisting of the guide boss 30 and the guide groove 40 may be provided in one set or multiple sets. When multiple sets are provided, they may be spaced apart along the circumferential or lateral direction of the backrest frame 200. The sliding member 300 is guided in a predetermined direction when sliding along the sliding cavity Q by the engagement between the provided guide boss 30 and the guide groove 40. Specifically, as the sliding member 300 slides along the sliding cavity Q, the guide boss 30 slides correspondingly within the guide groove 40, accurately guiding the sliding direction of the sliding member 300.

[0056] In addition to the above-described structural form in which the sliding cavity Q is provided in the backrest frame 200, other structural forms can be employed for providing the sliding member 300 slidably on the backrest frame 200, such as the following.

[0057] In one embodiment, the sliding member 300 is fitted onto the backrest frame 200 to form a sliding arrangement. The sliding member 300 has a sliding hole that matches the outer contour of the backrest frame 200, and the backrest frame 200 is inserted into the sliding hole of the sliding member 300 and fitted onto the backrest frame 200 through the sliding hole, thereby forming a sliding arrangement with the backrest frame 200. When the backrest frame 200 rotates, the sliding member 300 slides along the sliding cavity Q.

[0058] 5, in one embodiment, the backrest frame 200 is provided with an arc-shaped slide rail 50, and the sliding member 300 is slidably engaged with the arc-shaped slide rail 50 to move the headrest 400 along an arc track. In this case, the recess of the arc-shaped slide rail 50 is open toward the front side of the backrest frame 200.

[0059] When a user sits in the chair and leans backward, backrest frame 200 rotates backward relative to base 100, sliding member 300 slides along arc-shaped slide rail 50, and headrest 400 slides downward along the arc path relative to backrest frame 200, thereby adjusting the position and / or angle of headrest 400. As a result, headrest 400 follows and properly supports the user's head and / or neck, keeping the user's line of sight horizontal at all times and enabling work in a backward-leaning position.

[0060] When the user returns from a backward leaning posture to a straight sitting position, the backrest frame 200 rotates forward relative to the base 100, and the sliding member 300 slides along the arc-shaped slide rail 50, causing the headrest 400 to slide upward along the arc path relative to the backrest frame 200, thereby adjusting the position and / or angle of the headrest 400. This allows the headrest 400 to follow and properly support the user's head and / or neck.

[0061] In one embodiment, referring to FIG. 1 , the headrest 400 is rotatably configured. Specifically, the headrest 400 may be provided with a headrest frame 410, which is rotatably connected to the headrest frame 410 and attached to the sliding member 300 via the headrest frame 410. The rotatable configuration of the headrest 400 allows the user to adjust the support angle and / or position by rotating the headrest 400. In specific usage scenarios, the rotatable configuration of the headrest 400 helps to further improve the user's comfort when sitting in the chair. For example, when the user leans back in the chair, the backrest frame 200 rotates relative to the base 100, and the position and / or angle of the headrest 400 is adjusted by the action of the sliding member 300. At the same time, the headrest 400 can also rotate relative to the backrest, adaptively following the position of the user's head and / or neck. This allows the user's line of sight to be more accurately aligned horizontally.

[0062] Meanwhile, the headrest 400 can also rotate adaptively based on the position of the user's head and / or neck.

[0063] For example, when a user sits in a chair and rests their head and / or neck on headrest 400, if the head and / or neck moves, headrest 400 also rotates to follow the movement and adapt to the change in the angle of the user's head and / or neck. A specific usage scenario is when the user rests their head and / or neck on headrest 400 and leans back, and headrest 400 rotates accordingly, so that the user's line of sight is always kept horizontal.

[0064] It is also possible to manually control the rotation of the headrest 400. For example, While sitting in the chair, the user can manually control the rotation of the headrest 400 to adjust its position and / or angle to support his / her head and / or neck.

[0065] In addition, the rotation of the headrest 400 can also be electrically controlled.

[0066] In some embodiments, the chair further comprises a drive member connected to the headrest 400 .

[0067] The driving member drives the rotation of the headrest 400 when the backrest frame 200 rotates. That is, the headrest 400 is interlocked with the backrest frame 200 via the driving member, and the three are provided with a mutually cooperating operating mechanism. The driving member rotates the headrest 400 in response to the rotation of the backrest frame 200. The driving member includes a motor, the output shaft of which is connected to drive the rotation shaft of the headrest 400, and the headrest 400 rotates when the motor is operated. Optionally, the driving member is installed on the sliding member 300.

[0068] The backrest frame 200 is provided with detection elements such as angle sensors and encoders to monitor the rotation state of the backrest frame 200. The drive member supplies a driving force to the headrest 400 based on the detection data of the detection elements, thereby rotating the headrest 400.

[0069] A specific usage scenario is when the user leans backward in the chair, the backrest frame 200 rotates relative to the base 100, and the driving member correspondingly drives the headrest 400 to rotate, so that the user's line of sight is always kept horizontal.

[0070] In some embodiments, referring to FIG. 1, the chair further comprises a backrest 500 connected to the sliding member 300 .

[0071] When the backrest frame 200 rotates, the backrest 500 rotates together with the backrest frame 200, causing the sliding member 300 to slide on the backrest frame 200.

[0072] The backrest frame 200 is indirectly connected to the backrest 500 via the sliding member 300, and provides support for the backrest 500. The sliding member 300 is slidably installed on the backrest frame 200, and the backrest 500 is connected to the sliding member 300, so that the backrest 500 can slide relative to the backrest frame 200 via the sliding member 300. From another perspective, the sliding member 300 not only supports the sliding of the headrest 400, but also supports the sliding of the backrest 500.

[0073] When a user sits in a chair and leans back against the backrest 500, the force acting on the backrest 500 increases, and this force is transmitted synchronously to the sliding member 300 and the backrest frame 200, causing the backrest frame 200 to rotate and the sliding member 300 to slide (e.g., slide downward) on the backrest frame 200, thereby operating the headrest 400 (e.g., slide downward) and moving the backrest 500. This allows the angle and / or position of the headrest 400 and the backrest 500 to be adjusted synchronously, and not only does the headrest 400 follow the user's head and / or neck, but the backrest 500 also always follows the user's back and / or waist, providing sufficient support to the back and / or waist and further improving the user's comfort in the chair.

[0074] 1, 2, and 4, in some embodiments, the sliding member 300 is provided with a backrest connection portion 310, and the sliding member 300 is hinged to a backrest 500 via the backrest connection portion 310. Optionally, a connecting shaft passes through the backrest connection portion 310 of the sliding member 300, and the backrest 500 is connected to the connecting shaft directly or indirectly (i.e., via another intermediate member) and hinged to the sliding member 300.

[0075] The backrest 500 is connected to the sliding member 300 by a hinge so as to be rotatable relative to the sliding member 300. When a user leans back on the backrest 500 and leans back, the backrest is allowed to rotate relative to the backrest frame 200 within a certain range depending on how the hinge is connected, so that the backrest 500 rotates relative to the backrest frame 200 due to the biasing force of the human body, and adaptively fits the curves of the user's body (the curve of the back and / or the curve of the waist) in response to changes in the user's posture, thereby adapting to different changes in the user's sitting position.

[0076] In one embodiment, referring to Figures 1 and 2, the chair further includes a rotating member 900 that is spaced apart from the sliding member 300 in the longitudinal direction of the chair, one end of which is rotatably connected to the backrest frame 200 and the other end of which is connected to transmit the motion of the backrest 500.

[0077] The rotating member 900 is attached to the backrest frame 200 and is rotatably installed relative to the backrest frame 200. Specifically, the rotating member 900 can adopt structural forms such as a rotating rod or a rotating frame, and is rotatably installed on the backrest frame 200 by being pivotally connected to the backrest frame 200. The rotating member 900 is installed below the backrest frame 200 and is arranged to correspond to the lower half of the backrest 500 (considered to be the part of the backrest 500 that supports the waist of the human body). The backrest 500 and the rotating member 900 are in a transmission-connected relationship, and the provision of the rotating member 900 enables the backrest 500 to rotate relative to the backrest frame 200, and the rotating member 900 supports the rotation of the backrest 500 in correspondence with the backrest frame 200.

[0078] The power source for rotating the rotating member 900 may be as follows.

[0079] When a user leans back while leaning against the backrest 500, the force acting on the backrest 500 increases, and this force is transmitted synchronously to the rotating member 900 and the backrest frame 200, causing the backrest frame 200 to rotate backward and the rotating member 900 to rotate on the backrest frame 200, thereby supporting the rotation of the backrest 500 relative to the backrest frame 200.

[0080] That is, when the backrest frame 200 rotates relative to the base 100 , the backrest 500 rotates on the backrest frame 200 via the rotating member 900 .

[0081] In this embodiment, when a user sits on the chair and leans back against the backrest 500, the backrest 500 and the backrest frame 200 rotate relative to the base 100, and at the same time, the rotating body 900 rotates (e.g., rotates downward) relative to the backrest frame 200, thereby operating (e.g., rotates downward) the backrest 500, thereby adjusting the position and / or angle of the backrest 500 and supporting the user's lower back and other parts of the body. This adapts to changes in the user's posture and can further improve the user's comfort in the chair.

[0082] In some embodiments, referring to FIG. 1, the chair further comprises a transmission unit 600 coupled to the sliding member 300 and transmission-coupled to the base 100 and the seat cushion 700 of the chair.

[0083] However, the transmission unit 600 transmits power so as to move the sliding member 300 to the backrest frame 200 when the backrest frame 200 rotates.

[0084] When the backrest frame 200 rotates, the transmission unit 600 transmits the power to the sliding member 300 on the backrest frame 200 to slide.

[0085] The transmission unit 600 may be connected to transmit the base 100 or the chair seat cushion 700. The transmission principle of the transmission unit 600 is that when the backrest frame 200 rotates, the relative angle / position between the backrest frame 200 and the sliding member 300 thereon and the base 100 and the chair seat cushion 700 changes, and the transmission unit 600 between the base 100 or the chair seat cushion 700 and the sliding member 300 accordingly pulls the sliding member 300, causing the sliding member 300 to slide on the backrest frame 200. Such transmission connection may include a hinge, a pivoting connection, a sliding connection, etc., and this embodiment is not limited thereto. In an optional embodiment, a skeleton 800 (also called a seat cushion skeleton, base skeleton, interlocking skeleton, etc.) is provided on the base 100 or the seat cushion 700 of the chair, and the transmission unit 600 is connected to the base 100 or the seat cushion 700 of the chair by being transmission-connected to the skeleton 800.

[0086] In this embodiment, when the backrest frame 200 rotates, the sliding member 300 can be slid along the backrest frame 200 due to the transmission operation of the sliding member 300 by the transmission unit 600 provided.

[0087] It should be noted that the transmission unit 600 may have a variety of configurations, for example.

[0088] In some embodiments, referring to Figures 1 and 2, the transmission unit 600 includes a link unit 610 that is hinged at one end to the sliding member 300 and is transmission-coupled at the other end to the base 100 or the seat cushion 700 of the chair.

[0089] The transmission unit 600 uses a link unit 610, and the link unit 610 may have one or more links, and the number of links is not limited. As an example, as shown in FIGS. 1 and 2 , two links, a first link 611 and a second link 612, are provided. The first link 611 and the second link 612 are connected directly or indirectly by a hinge. One end of the first link 611 that is separated from the second link 612 is hinged to the sliding member 300, and one end of the second link 612 that is separated from the first link 611 is transmission-connected (e.g., hinged) to the base 100 or the seat cushion 700 of the chair. In the rotating member 900 described in the above embodiment, the first link 611 and the second link 612 are each hinged to the support 900.

[0090] When the backrest frame 200 rotates backward, the relative angle / position with respect to the base 100 and the chair seat cushion 700 changes, and the link unit 610 transmits a force to the sliding member 300 in response to the movement, pulling the sliding member 300 and causing it to slide downward relative to the backrest frame 200. On the other hand, when the backrest frame 200 rotates forward, the link unit 610 returns in response, causing the sliding member 300 to slide upward relative to the backrest frame 200.

[0091] And / or, in some embodiments, referring to FIG. 6 , the transmission unit 600 includes a connecting rope 620 having one end connected to the sliding member 300 and the other end connected to the base 100 or the seat cushion 700 of the chair for transmission.

[0092] The transmission unit 600 uses a connecting rope 620, which is arranged along the backrest frame 200 provided with a guide structure formed by a guide path, and the connecting rope 620 passes through the guide path of the guide structure, with both ends connected to the sliding member 300 and the base 100 or the seat cushion 700 of the chair, respectively.

[0093] When the backrest frame 200 rotates backward, the connecting rope 620 changes its angle / position relative to the base 100 or the chair seat cushion 700, pulling the sliding member 300 relative to the backrest frame 200 and sliding it downward from its initial position, and when the backrest frame 200 rotates forward, the sliding member 300 slides upward relative to the backrest frame 200 and returns to its initial position.

[0094] In some embodiments, referring to FIGS. 1 to 3, the backrest frame 200 includes a backrest support portion 210 that supports the backrest, and a base connection portion 220 that is rotatably connected to the base 100.

[0095] The sliding member 300 is slidably mounted on the back support part 210 .

[0096] The backrest frame 200 is composed of a backrest support portion 210 and a base connector 220. The backrest support portion 210 and the base connector 220 may be arranged to form an angle therebetween, which may be a right angle or an obtuse angle. The backrest support portion 210 and the base connector 220 may be integrally molded or may be detachably connected. The backrest frame 200 supports the backrest 500 via the backrest support portion 210 and is rotatably connected to the base 100 via the base connector 220. The structure for rotatably connecting the backrest frame 200 and the base 100 is such that the base connector 220 of the backrest frame 200 is drilled into the base 100 via a hinge axis Jz, thereby rotatably connecting the backrest frame 200 to the base 100. Furthermore, the rotating part J may be fixedly connected to the base connecting part 220 of the backrest frame 200, and a hinge shaft Jz may be inserted into the rotating part J, thereby forming a rotatable connection relationship with the base 100. Note that the above is merely an example and does not limit the present disclosure.

[0097] When the sliding member 300 is attached to the backrest frame 200 based on the installation position of the headrest 400, it is slidably provided on the backrest support portion 210.

[0098] The above description is a part or preferred embodiment of the present invention, and does not limit the scope of the present invention, regardless of the characters or drawings. Equivalent structural transformations utilizing the contents of the specification and drawings of the present invention under the overall concept of the present invention are also included in the technical scope of the present invention, whether directly or indirectly applied in other related technical fields.

Claims

1. base, a backrest frame pivotally connected to the base and connected to the backrest; A sliding member slidably mounted on the backrest frame; and a headrest installed on the sliding member; The chair, wherein when the backrest frame rotates, the sliding member slides on the backrest frame to move the headrest.

2. 2. The chair according to claim 1, wherein the back frame is provided with a sliding cavity extending in the longitudinal direction thereof, and the sliding member is inserted into the sliding cavity and slidably cooperates with the sliding cavity.

3. a sliding structure is provided on at least one of the backrest frame and the sliding member; 3. The chair according to claim 2, wherein the sliding structure supports the sliding member to slide along the sliding cavity.

4. 4. The chair according to claim 3, wherein when the sliding structure is provided on the backrest frame, the sliding structure includes at least one support that is rotatably protruding from an inner wall of the sliding cavity and forms rolling contact with the sliding member.

5. A slide groove extending along the longitudinal direction of the outer wall of the sliding member is formed on the outer wall of the sliding member, 5. The chair according to claim 4, wherein the support is received in the slide groove and forms rolling contact with a bottom wall of the slide groove.

6. a guide boss is provided on one of the outer wall of the sliding member and the inner wall of the sliding cavity, and a guide groove is provided on the other; The chair according to claim 2, wherein the guide boss is inserted into the guide groove and slidably installed, thereby guiding the sliding member to slide along the sliding cavity.

7. 2. The chair according to claim 1, wherein the sliding member is fitted onto the back frame and is slidably mounted on the back frame.

8. The backrest frame is provided with an arc-shaped slide rail, 2. The chair according to claim 1, wherein the sliding member slidably engages with the arc-shaped slide rail to move the headrest along the arc-shaped slide rail.

9. 9. The chair according to claim 1, wherein the headrest is provided rotatably.

10. a drive member connected to the headrest; The chair according to claim 9, wherein the driving member drives the headrest to rotate when the backrest frame rotates.

11. a backrest connected to the sliding member; The chair according to any one of claims 1 to 8, characterized in that when the backrest frame rotates, the backrest rotates following the backrest frame, and the sliding member slides with the backrest frame.

12. 12. The chair according to claim 11, wherein the sliding member is provided with a backrest connection, and the sliding member is hingedly connected to the backrest via the backrest connection.

13. Further comprising a rotating member, The chair according to claim 11, wherein the rotating member is spaced apart from the sliding member in the vertical direction of the chair, one end of the rotating member is rotatably connected to the backrest frame, and the other end of the rotating member is power-transmittingly connected to the backrest.

14. a transmission unit connected to the sliding member and transmission-connected to the base or a seat cushion of a chair; The chair according to any one of claims 1 to 8, wherein the transmission unit causes the sliding member to slide along the backrest frame when the backrest frame rotates.

15. The transmission unit includes a link unit, one end of which is hinged to the sliding member and the other end of which is transmission-coupled to the base or a seat cushion of a chair; and / or 15. The chair according to claim 14, wherein the transmission unit includes a connecting rope, one end of which is connected to the sliding member and the other end of which is connected to the base or the seat cushion of the chair.

16. the backrest frame includes a backrest support portion that supports the backrest and a base connection portion that is rotatably connected to the base, The chair according to any one of claims 1 to 8, wherein the sliding member is slidably installed on the backrest support portion.

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