Chair

Abstract

SOLUTION: The chair includes a base 100, a seat 200 provided on the base 100, an armrest 300 provided on a side of the seat 100, a backrest frame 400 rotatably connected to the base 100, and a linkage mechanism 500 provided on the base 100 and connected to the armrest 300, wherein the linkage mechanism 500 is further interlockingly connected to the backrest frame 400, and when the backrest frame 400 rotates, the armrest 300 is driven to move by the linkage mechanism 500.EFFECT: Due to the arrangement of the linkage mechanism 500, the backrest frame 400 and the armrest 300 can be linked. When the user leans backward or lies on the backrest 600, the backrest 600 and the backrest stand 400 rotate relative to the base 100, and at this time, the linkage mechanism 500 drives the armrest 300 to follow the arm of the user, thereby improving the comfort of the user.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to the technical field of chairs, and more particularly to chairs. [Background technology]

[0002] Chairs are widely seen in places such as offices and study rooms, meeting the needs of people sitting to work, study, and rest. A chair generally has components such as a base, a backrest, a seat, and armrests. When a person sits in a chair, their arms naturally rest on the armrests, which provide support for the arms. In related art, the armrests are fixed to the seat. When a user sits in a chair and leans back or lies down, the center of gravity of the body and the arms move backward as the angle of leaning back or lying down increases, which can easily cause at least a portion of the arm (e.g., the elbow) to come off the armrest and float. This causes a problem of insufficient support for the arm, reducing the user's comfort when using the chair. Summary of the Invention

[0003] The main object of the present application is to provide a chair that improves the comfort of the user when using the chair.

[0004] To achieve the above object, the present application proposes a chair comprising a base, a seat portion attached to the base, armrests attached to the sides of the seat portion, a backrest frame rotatably connected to the base, and an interlocking mechanism connected to the armrests, the interlocking mechanism being further interlocked with the backrest frame so that the armrests are moved by the interlocking mechanism when the backrest frame rotates.

[0005] In some embodiments, the linkage mechanism further includes a framework movably connected to the base, the framework is power-transmittingly connected to the backrest frame, and can move in accordance with the backrest frame when the backrest frame rotates. The armrest is attached to the framework.

[0006] In some embodiments, the armrest is slidably mounted relative to the skeleton, and the linkage mechanism further comprises a linkage assembly coupled to the armrest for sliding the armrest relative to the skeleton as the back frame rotates.

[0007] In some embodiments, the armrest is slidably mounted relative to the framework, and the linkage mechanism further comprises a linkage assembly coupled to the armrest, the linkage assembly causing the armrest to slide relative to the framework as the back frame rotates.

[0008] In some embodiments, the link assembly includes a first link, a second link, and a third link, the second link being rotatably mounted on the framework or the seat and disposed between the first link and the third link, one end of the first link being hinged to the base, the other end being hinged to one end of the second link, the other end of the second link being hinged to one end of the third link, and the other end of the third link being hinged to the armrest.

[0009] In some embodiments, the first link is disposed at an angle to the second link. The first link includes a base connection arm and a link connection arm. One end of the base connection arm remote from the link connection arm is hingedly connected to the base. One end of the link connection arm remote from the base connection arm is hingedly connected to the second link. The width of the link connection arm is greater than the width of the base connection arm, and / or the first link has reinforcing ribs protruding from both opposing surfaces in its thickness direction, the reinforcing ribs being provided on the base connection arm and at least a portion of which extends to the link connection arm.

[0010] In some embodiments, the first link is elastically deformable and / or the third link is elastically deformable.

[0011] In some embodiments, the chair further comprises a mounting bracket coupled to the base. The armrest is slidably mounted relative to the base, the seat, or the mounting bracket. The armrest is slidably mounted relative to the base, the seat, or the mounting bracket. The linkage mechanism comprises a linkage assembly coupled to the armrest for sliding the armrest relative to the base, the seat, or the mounting bracket when the back frame rotates.

[0012] In some embodiments, the linkage assembly comprises a pulley assembly. The pulley assembly includes a first pulley rotatably mounted on the base, a second pulley, and a wire wound around the first pulley and the second pulley. The first pulley is power-transmittingly connected to the backrest frame. The armrest is fixedly connected to the wire and is movable by the wire.

[0013] In some embodiments, a hinge shaft is connected to the backrest frame. The backrest frame is connected to the base via the hinge shaft and is rotatably connected to the base. The linkage assembly further includes a transmission assembly. The transmission assembly is provided between the hinge shaft and the first pulley, and is connected to the hinge shaft and the first pulley, respectively, and transmits power to the first pulley when the backrest frame rotates, thereby rotating the first pulley.

[0014] In some embodiments, the chair further comprises a sliding support assembly coupled to the armrest for supporting sliding movement of the armrest.

[0015] In some embodiments, the linkage mechanism further includes a linkage member between the linkage assembly and the armrest. The linkage assembly is connected to the linkage member for operating the armrest and is connected to the armrest so as to be slidable relative to the linkage member. An elastic member is provided between the linkage member and the armrest. The elastic member acts on the armrest and applies an elastic force that returns the armrest to the linkage member.

[0016] The chair of the present application is provided with an interlocking mechanism that allows the backrest frame and armrests to be interlocked. When a user sits in the chair and leans their body against the backrest at the rear, leaning back or lying down, the backrest and backrest frame rotate relative to the base, and the interlocking mechanism then moves the armrests to follow the user's arms, providing sufficient support for the user's arms at all times and improving comfort when using the chair. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a structural schematic diagram of a chair according to an embodiment of the present invention; [Figure 2] 1 is a structural schematic diagram of a portion of a chair in one embodiment of the present application. [Figure 3] FIG. 3 is an enlarged view of part A in FIG. 2. [Figure 4] FIG. 10 is a structural schematic diagram of another part of the chair according to an embodiment of the present application. [Figure 5] FIG. 10 is a structural schematic diagram of yet another part of the chair in one embodiment of the present application. [Figure 6] FIG. 10 is a structural schematic diagram of a chair according to another embodiment of the present invention. [Figure 7] FIG. 7 is a structural schematic diagram of a part of the chair in the embodiment of FIG. 6. [Figure 8] 7 is a structural schematic diagram of another part of the chair in the embodiment of FIG. 6. [Figure 9] 7 is a structural schematic diagram of yet another part of the chair in the embodiment of FIG. 6. FIG. [Figure 10] FIG. 10 is a structural schematic diagram of a portion of a chair in yet another embodiment of the present application. [Figure 11] FIG. 10 is a structural schematic diagram of a portion of a chair in yet another embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without any creative efforts fall within the scope of protection of the present application.

[0019] Note that all directional indications (e.g., up, down, left, right, front, back, etc.) in the embodiments of the present application are used only to interpret the relative positional relationships, movement situations, etc. between components in a specific seating posture (the seating posture shown in the drawings). When the specific seating posture changes, the directional indications also change accordingly.

[0020] When a part is said to be "fixed" or "mounted" to another part, the part may be directly fixed or mounted to the other part, or may be fixed or mounted to the other part via an intermediate part. When a part is said to be "connected" to another part, the part may be directly connected to the other part, or may be connected via an intermediate part.

[0021] Furthermore, the terms "first," "second," etc., used herein are for descriptive purposes only and do not indicate or imply the relative importance of, or the number of, the designated technical features. Therefore, a feature defined by "first" or "second" may explicitly or implicitly include at least one of the designated feature. Furthermore, the technical solutions in each embodiment may be combined with each other, provided that such combinations are feasible by a person skilled in the art. If a combination of technical solutions results in a contradiction or is impossible to realize, such combination shall be deemed non-existent and shall not be included in the scope of the claims of this application.

[0022] Chairs are pieces of furniture that people sit on when working, studying or resting, and their technology is developing in a more humanized and intelligent direction, aiming to provide users with a comfortable and healthy sitting experience.

[0023] An embodiment of the present application proposes a chair. As shown in Fig. 1, the chair includes a base 100, a seat 200 provided on the base 100, armrests 300 provided on the sides of the seat 200, a backrest frame 400 rotatably connected to the base 100, and an interlocking mechanism 500 connected to the armrests 300. The interlocking mechanism 500 is further interlocked with the backrest frame 400, and moves the armrests 300 when the backrest frame 400 rotates.

[0024] In this embodiment, the base 100 (also called the chassis) is the foundation of the entire chair structure, and has sufficient strength and stability to bear the weight of the human body and various pressures that may occur during use. The base 100 is also an important part that connects the main body of the chair (e.g., the backrest 600, the seat 200, etc.), and forms the complete chair structure by combining each part using a specific connection method (e.g., fixed connection, pivot connection, etc.).

[0025] When a person sits on the chair, they sit on the seat 200, which supports their buttocks and thighs. Their arms can naturally rest on the armrests 300, which support their arms. The seat 200 typically includes a bottom structure, a padding layer, and an outer covering layer. The bottom structure supports and secures the padding layer and is generally made of metal or plastic. The padding layer is located between the bottom structure and the outer covering layer and primarily provides support and cushioning. Commonly used padding materials include sponge, foam, and latex. The outer covering layer covers the padding layer and bottom structure and is generally made of fabric, leather, or artificial leather. The seat 200 may have an adjustment function. For example, the seat 200 may be movably mounted on the base 100, thereby controlling the movement of the seat 200 to adjust its height, tilt angle, or depth to accommodate the person's sitting posture and meet the needs of different locations. The seat 200 may also adopt a partition design. This design can provide different support to different body parts, contributing to improved comfort. Furthermore, the armrest 300 may have angle and position adjustment functions. For example, a user can adjust the outward tilt angle of the armrest 300 by opening it outward, or adjust the inward tilt angle by closing it inward. Furthermore, a user can press a button to unlock and move the armrest 300 up or down to adjust the height position of the armrest 300, thereby adapting the armrest 300 to the position of the human arm and meeting the needs of different usage situations. A chair typically employs two armrests 300, one on each side of the seat 200. The armrests 300 may be installed on the seat 200 or the base 100; the installation position of the armrests 300 is not limited in this embodiment.

[0026] The backrest frame 400 may be disposed behind the base 100 to cooperate with the backrest 600 to support the back and / or lumbar region of the human body. The shape of the backrest frame 400 may be various, such as an arc shape, an S-shape, an L-shape, etc., and may be set according to actual structural requirements. To ensure sufficient support strength, the backrest frame 400 may be manufactured from materials such as metal (e.g., steel, aluminum alloy, etc.) or plastic. Here, the backrest frame 400 may be a component of the backrest 600. For example, the backrest frame 400 may be drilled into the backrest 600 and provided integrally with the backrest 600, or, as shown in FIG. 1, the backrest frame 400 may be connected to the backrest 600 and used to support the backrest 600. For example, with the front-rear and left-right directions of the chair taken as reference directions, the backrest 600 is located in front of the backrest frame 400 and is connected to the backrest frame 400. As shown in FIG. 1 , the backrest frame 400 may include a base connector 410 and a backrest support 420. The backrest support 420 is disposed at a right angle or an obtuse angle with the base connector 410. The backrest support 420 supports the backrest 600. The base connector 410 is rotatably connected to the base 100. Here, the pivotal connection between the backrest frame 400 and the base 100 is achieved by drilling the base connector 410 into the base 100 via a hinge axis Jz, thereby allowing the backrest 600 to be rotatably connected to the base 100. Furthermore, the base connection portion 410 of the backrest frame 400 is detachably connected to the rotation member 430, and the rotation member 430 is fitted onto the hinge axis Jz, thereby forming a rotatable connection relationship with the base 100. Of course, this is merely an example and is not limiting. When a user sits on the chair, the back and / or lower back can lean against the backrest 600, and the backrest frame 400 corresponds to supporting the back and / or lower back. Also, when switching from a sitting position to a leaning back / lying down position, the backrest frame 400 can correspondingly rotate to accommodate the user's sitting position.In this embodiment, the backrest frame 400 may be called a seat back frame, a linking frame, etc., based on the function and action of the backrest frame 400, and the names are not limited thereto.

[0027] The function of the interlocking mechanism 500 is to achieve interlocking between the backrest frame 400 (which may also be considered as the backrest 600) and the armrest 300. Specifically, the interlocking mechanism 500 is interlockingly connected to the backrest frame 400, and when the backrest frame 400 rotates, the interlocking mechanism 500 moves the armrest 300 accordingly, causing the armrest 300 to move in accordance with the backrest frame 400. Here, the movement of the armrest 300 may be, but is not limited to, moving forward and backward relative to the base 100.

[0028] Illustratively, when the backrest frame 400 is subjected to a rearward external force (e.g., rearward pressure applied to the backrest frame 400 when a user leans back / lies down, or an electric driving force), the backrest frame 400 rotates rearward, and the interlocking mechanism 500 correspondingly moves the armrests 300 rearward. For example, when a user leans back / lies down, the backrest frame 400 rotates rearward, and the interlocking mechanism 500 simultaneously moves the armrests 300 rearward, automatically adjusting their positions to accommodate the user's sitting posture and / or position. When the backrest frame 400 is subjected to a forward external force, the backrest frame 400 rotates forward, and the interlocking mechanism 500 correspondingly moves the armrests 300 forward. For example, when a user switches from a leaning / lying down position to a sitting upright position, the back frame 400 rotates forward and the linkage mechanism 500 simultaneously moves the armrests 300 forward, automatically adjusting their positions to accommodate the user's sitting posture and / or position.

[0029] The interlocking mechanism 500 is installed on the base 100, and its structural installation may take various forms. For example, the interlocking mechanism 500 may be composed of a detection structure (e.g., angle sensor, encoder, etc.) that monitors the rotation state of the backrest frame 400, a drive structure (e.g., motor, etc.) that provides driving force based on data detected by the detection structure, and a transmission structure (e.g., gears and racks, chains, belts, etc.) that transmits the power of the drive structure to the armrest 300 and operates the armrest 300.

[0030] The above is merely an example and is not limiting. Other structural configurations of the interlocking mechanism 500 may be adopted, and specific examples will be described in subsequent embodiments.

[0031] The chair of this embodiment is provided with an interlocking mechanism 500, which allows the backrest frame 400 and the armrests 300 to interlock with each other. When a user sits in the chair and leans their body against the backrest to lean back / lie down, the backrest 600 and the backrest frame 400 rotate relative to the base 100. At this time, the interlocking mechanism 500 correspondingly moves the armrests 300 to follow the user's arms, always providing sufficient support for the user's arms, which is advantageous for improving the comfort of the user when using the chair.

[0032] 1, the linkage mechanism 500 includes a framework 510 that is movably connected to the base 100, is power-coupled to the backrest frame 400, and can move in accordance with the backrest frame 400 when the backrest frame 400 rotates. Here, the armrest 300 is attached to the framework 510.

[0033] The interlocking mechanism 500 employs a structure of a skeleton 510. The skeleton 510 may be an integrally molded skeleton or may be a skeleton assembled from a plurality of different parts or members, but this embodiment is not limited thereto.

[0034] The skeleton 510 and the base 100 may be connected in a movable manner, including a rotating connection, a sliding connection, or the like, or may be connected in a movable manner by a link structure. Since the skeleton 510 is connected in a movable manner to the base 100, the skeleton 510 can move relative to the base 100, and the manner of movement includes translation, rotation, and the like.

[0035] The power transmission connection between the skeleton 510 and the backrest frame 400 may be such that the skeleton 510 and the backrest frame 400 are directly connected to form a power transmission relationship therebetween, or an intermediate connecting member may be connected to the backrest frame 400, and the skeleton 510 may be connected to the backrest frame 400 via the intermediate connecting member to form a power transmission relationship therebetween. Here, the intermediate connecting member may be a support member that can support the backrest frame 400. Regardless of whether the skeleton 510 is directly connected to the backrest frame 400 or indirectly connected via the intermediate connecting member, the connection form adopted may be a movable connection including a pivotal connection, a sliding connection, etc., or a movable connection connected by a link structure. The skeleton 510 is transmission-connected to the backrest frame 400, so that when the backrest frame 400 rotates due to an external force, the backrest frame 400 moves the skeleton 510, realizing transmission to the skeleton 510, and thereby the skeleton 510 moves the armrest 300.

[0036] The skeleton 510 may be referred to as an interlocking skeleton, a base skeleton, a seat skeleton, or the like, depending on the function and action it performs. For example, the skeleton 510 can be called an interlocking skeleton because it has an interlocking action. Furthermore, for example, the skeleton 510 can be called a base skeleton because it is installed on the base 100 and belongs to the structural design of the base 100. Furthermore, for example, the skeleton 510 can be called a seat skeleton because it is a component of the seat 200, forms the seat 200 by covering the outer shell of the seat thereon, and can support the seat 200, and belongs to the structural design of the seat 200.

[0037] 1, the skeleton 510 has a front end and a rear end spaced apart from each other along the front-to-rear direction of the chair or along the front-to-rear direction of the base 100. Specifically, the front end of the skeleton 510 is movably connected to the base 100, and the rear end of the skeleton 510 is power-transmittingly connected to the backrest frame 400, so that the skeleton 510 can move relative to the base 100 along the front-to-rear direction of the base 100 via the backrest frame 400.

[0038] Because the backrest frame 400 and the base 100 are pivotally connected, the front end of the skeleton 510 is movably connected to the base 100, and the rear end of the skeleton 510 is power-transmittingly connected to the backrest frame 400, thereby forming a link mechanism among the backrest frame 400, the base 100, and the skeleton 510, which have a relatively defined motion relationship. Therefore, due to the existence of this link mechanism, the skeleton 510 has a limited motion trajectory and a corresponding motion. That is, when the backrest frame 400 pivots, the skeleton 510 moves along a limited motion trajectory accordingly, and performs the corresponding motion.

[0039] The armrest 300 is mounted on the skeleton 510 and is connected to the backrest frame 400 via the skeleton 510, and a cooperative operating mechanism exists between the three. When the backrest frame 400 receives an external force and rotates, the backrest frame 400 moves the skeleton 510, realizing power transmission to the skeleton 510, which then moves the armrest 300.

[0040] When a user leans back / lies down and the backrest frame 400 rotates backward (e.g., counterclockwise), the backrest frame 400 is transmitted to the skeleton 510 and moves backward, and the armrests 300 on the skeleton 510 also move backward accordingly. This allows the position of the armrests 300 to be adjusted when the user leans back / lies down, so that the armrests 300 can self-adapt to the position of the user's arms. On the other hand, when a user switches from a leaning back / lying down position to a sitting upright position, the backrest frame 400 is transmitted to the skeleton 510 and moves forward, and the armrests 300 on the skeleton 510 also move forward accordingly. This allows the position of the armrests 300 to be adjusted when the user switches from a leaning back / lying down position to a sitting upright position, so that the armrests 300 can self-adapt to the position of the user's arms.

[0041] 1-3, in some embodiments, the armrest 300 is slidably mounted relative to the framework 510. The linkage mechanism 500 further comprises a linkage assembly to which the armrest 300 is coupled, which is used to slide the armrest 300 relative to the framework 510 as the back frame 400 rotates.

[0042] Here, the armrest 300 can be attached to the framework 510 by a sliding structure such as a guide rail and a slider, a guide rod and a guide bush, etc., to achieve a slidable installation on the framework 510.

[0043] The function of the interlocking assembly is that when the backrest frame 400 rotates, the armrest 300 is transmitted to the armrest 300, causing the armrest 300 to slide relative to the frame 510. That is, the armrest 300 is not only mounted on the frame 510, but is also transmission-coupled to the backrest frame 400 by the interlocking assembly. Specifically, when the backrest frame 400 rotates to move the frame 510, the armrest 300 moves following the frame 510 because the armrest 300 is mounted on the frame 510. At the same time, the interlocking assembly is transmitted to the armrest 300, causing the armrest 300 to slide along the frame 510. That is, when the backrest frame 400 rotates, the armrest 300 not only moves following the frame 510, but can also slide along the frame 510 due to the transmission of the interlocking assembly, which allows the armrest 300 to have a larger operating stroke, improves its ability to follow the user's arms, and provides better support for the user's arms.

[0044] The linkage assembly described in the above embodiments may have various structural configurations. For example, in some embodiments, referring to Figures 3 and 4, the linkage assembly includes a link assembly 520 provided on the framework 510 or the seat 200, one end of which is hinged to the base 100 and the other end of which is hinged to the armrest 300.

[0045] Here, when the link assembly 520 is installed in the seat 200, the skeleton 510 may be a seat skeleton. The seat 200 is formed by covering the skeleton 510 with an outer shell of the seat. The seat 200 can move in accordance with the skeleton 510, and the movements can be synchronized. The link assembly 520 may be an outer shell of the seat provided on the seat 200.

[0046] The linkage assembly employs a link assembly 520 to convert the rotational movement of the backrest frame 400 into the linear movement of the armrest 300, thereby achieving power transmission. Specifically, when the backrest frame 400 rotates backward, the skeleton 510 moves backward accordingly. At the same time, the relative position of the skeleton 510 to the base 100 changes, causing the link assembly 520 installed on the skeleton 510 or the seat 200 to move correspondingly (i.e., the position of the link in the link assembly 520 changes), causing the armrest 300 to move backward relative to the skeleton 510 via the link assembly 520. When the backrest frame 400 rotates forward, the skeleton 510 rotates forward in conjunction with the skeleton 510, and the relative position of the skeleton 510 to the base 100 changes, causing the link assembly 520 installed on the skeleton 510 or the seat 200 to operate correspondingly, and the armrest 300 moves forward relative to the skeleton 510 via the link assembly 520.

[0047] 3 to 5 , the link assembly 520 includes a first link 521, a second link 522, and a third link 523. The second link 522 is rotatably attached to the framework 510 or the seat 200, and is provided between the first link 521 and the third link 523. One end of the first link 521 is hingedly connected to the base 100, the other end of the first link 521 is hingedly connected to one end of the second link 522, the other end of the second link 522 is hingedly connected to one end of the third link 523, and the other end of the third link 523 is hingedly connected to the armrest 300.

[0048] The link assembly 520 has a three-link structure consisting of a first link 521, a second link 522, and a third link 523, and is installed between the base 100 and the armrest 300. The base 100, the first link 521, the second link 522, the third link 523, and the armrest 300 are connected in sequence.

[0049] The transmission principle of this link assembly 520 is that when the backrest frame 400 rotates, the skeleton 510 moves relative to the base 100, changing the relative position between them. Since the first link 521 is hingedly connected to the base 100 and the second link 522 attached to the skeleton 510 or the seat 200, respectively, when the relative position between the skeleton 510 and the base 100 changes, the first link 521 rotates the second link 522, and the second link 522 moves the third link 523 during rotation, and the movement of the third link 523 causes the armrest 300 to slide relative to the skeleton 510.

[0050] 5, the first link 521 is disposed at an angle to the second link 522. The first link 521 includes a base connecting arm 521A and a link connecting arm 521B. One end of the base connecting arm 521A remote from the link connecting arm 521B is hingedly connected to the base 100, and one end of the link connecting arm 521B remote from the base connecting arm 521A is hingedly connected to the second link 522. The width of the link connecting arm 521B is greater than the width of the base connecting arm 521A, and / or the first link 521 is provided with reinforcing ribs Jq protruding from both opposing surfaces in the thickness direction thereof, the reinforcing ribs Jq being provided on the base connecting arm 521A and at least a portion of which extends to the link connecting arm 521B.

[0051] Here, the hinge axis between the first link 521 and the base 100 is a horizontal axis, and the hinge axis between the first link 521 and the second link 522, the hinge axis between the second link 522 and the third link 523, and the hinge axis between the third link 523 and the armrest 300 may all be vertical axes. When the backrest frame 400 rotates backward (for example, when the user leans back / lies down), the skeleton 510 moves backward. At this time, the positions of the skeleton 510 and the base 100 change relative to each other. If the skeleton 510 is a stationary reference system (in reality, the skeleton 510 moves and the base 100 does not, but here, for the sake of clarity, the skeleton 510 is used as the reference system), the base 100 moves forward. Because the hinge axis between the first link 521 and the base 100 is a horizontal axis (corresponding to the two being hinged in the vertical direction), relative movement in the vertical direction is eliminated and can all be converted into horizontal rotation of the second link 522. The second link 522 rotates around the hinge point between the second link 522 and the skeleton 510 by the first link 521, and then this rotation is converted into movement of the third link 523. The third link 523 moves the armrest 300 backward, realizing the following movement of the armrest 300.

[0052] Here, since the hinge axis between the first link 521 and the base 100 is a horizontal axis, and the hinge axis between the first link 521 and the second link 522 is a vertical axis, the first link 521 is subjected to different forces in two directions during movement of the armrest 300.

[0053] The base connecting arm 521A and the link connecting arm 521B of the first link 521 are connected to the base 100 and the second link 522, respectively. By making the width of the link connecting arm 521B larger than the width of the base connecting arm 521A, i.e., by making the width of the link connecting arm 521B relatively wide and the width of the base connecting arm 521A relatively narrow, the first link 521 has a certain deformation capacity and a certain structural strength, can withstand torsional forces in the corresponding directions, and can easily deform; and / or by providing reinforcing ribs Jq protruding from both opposing surfaces in the thickness direction of the first link 521, and the reinforcing ribs Jq are provided on the base connecting arm 521A and extend at least partially to the link connecting arm 521B, the first link 521 has a certain deformation capacity and a certain structural strength, can withstand folding forces in the corresponding directions, and can easily deform.

[0054] In some embodiments, the first link 521 and / or the third link 523 are elastically deformable. The term "elastically deformable" means that the first link 521 can be deformed when subjected to an external force and can recover to its original shape after the external force is removed. Here, the first link 521 may be made of an elastically deformable material such as rubber. The first link 521 has relative flexibility and is used to absorb torsional deformation that occurs when the angle of the armrest 300 is adjusted (rotated outward or inward), and can accommodate, but is not limited to, the angle / position of the armrest 300 tilted outward or inward.

[0055] The third link 523 being elastically deformable means that the third link 523 is deformed when subjected to an external force and can recover to its original shape after the external force is removed. Here, the third link 523 may be made of an elastically deformable material such as rubber. The third link 523 has relative flexibility and can be used to absorb torsional deformation that occurs at the hinge positions on both ends during movement, thereby realizing power transmission to the armrest 300.

[0056] In some embodiments, the linkage mechanism 500 further includes a linkage assembly to which the armrest 300 is connected, which is used to slide the armrest 300 relative to the base 100, the seat 200, or the mounting bracket when the back frame 400 rotates.

[0057] Here, when the armrest 300 is slidably mounted on the base 100, the seat 200 or the mounting bracket, the armrest 300 can be attached to the installation object (the base 100, the seat 200 or the mounting bracket) by a sliding structure such as a guide rail and a slider, a guide rod and a guide bush, etc., thereby realizing slidable installation on the installation object.

[0058] The role of the interlocking assembly is to transmit rotation of the backrest frame 400 to the armrest 300, causing the armrest 300 to slide along the installation target. The armrest 300 is installed on the installation target, such as the base 100, the seat 200, or the mounting bracket, and is installed to interlock with the backrest frame 400 via the interlocking assembly, so that a cooperative operating mechanism exists between the three. When the backrest frame 400 rotates due to an external force, the interlocking assembly causes the armrest 300 to slide along the installation target.

[0059] As shown in the skeleton 510 of the previous embodiment, the mounting bracket of this embodiment can also be called a base bracket or a seat bracket, and its structural configuration can be designed with reference to the skeleton 510. The difference between the two is that the skeleton 510 of the previous embodiment is movable relative to the base 100, while the mounting bracket of this embodiment can be fixedly installed on the base 100.

[0060] Here, the linkage assembly described in the above-described embodiments may have various structural forms. For example, in some embodiments, the linkage assembly includes a pulley assembly 530 including a first pulley 531 rotatably mounted on the base 100, a second pulley 532, and a wire 533 wound around the first pulley 531 and the second pulley 532, as shown in Figures 6 to 8. Here, the first pulley 531 is power-transmittingly connected to the backrest frame 400, and the armrest 300 is fixedly connected to the wire 533 and is movable by the wire 533.

[0061] The first pulley 531 may be a winding pulley, and the second pulley 532 may be a guide pulley. The wire 533 bypasses the second pulley 532, and both ends of the wire 533 are wound around the first pulley 531 in opposite directions. Specifically, the first pulley 531 may be provided with two separately arranged winding grooves, and both ends of the wire 533 are wound around the two winding grooves of the first pulley 531, respectively. Based on this structural configuration, the transmission principle of the pulley assembly 530 is as follows: When the backrest frame 400 rotates, the force is transmitted to the first pulley 531, causing it to rotate, and the first pulley 531 winds or releases the wire 533. The second pulley 532 supports the movement of the wire 533, which causes the armrest 300 to slide.

[0062] Specifically, when the backrest frame 400 rotates rearward, the first pulley 531 is powered to rotate, winding up one end of the wire 533 while simultaneously releasing the other end, and the armrest 300 is pulled rearward and moved by the operation of the wire 533. When the backrest frame 400 rotates forward, the first pulley 531 is powered to rotate, winding up the other end of the wire 533 while simultaneously releasing one end, and the armrest 300 is pulled forward and moved by the operation of the wire 533.

[0063] In addition to the above embodiment, the first pulley 531 and the second pulley 532 may both be winding pulleys, with one end of the wire 533 wound around the first pulley 531 and the other end of the wire 533 wound around the second pulley 532, which is connected to a reset member (e.g., a reset torsion spring). Based on this structural setting, the transmission principle of the pulley assembly 530 is as follows: when the backrest frame 400 rotates, the rotation is transmitted to the first pulley 531, causing the first pulley 531 to rotate, and the first pulley 531 winds or releases the wire 533. When the first pulley 531 winds up the wire 533, the second pulley 532 rotates to release the wire 533, and the reset member accumulates elastic energy. When the first pulley 531 releases the wire 533, the reset member acting on the second pulley 532 releases the elastic energy, and the second pulley 532 rotates due to the action of the reset member to wind up the wire 533.

[0064] Here, the linkage assembly may employ a pulley assembly 530 whether the armrest 300 is mounted on the framework 510, the base 100, the seat 200 or the mounting bracket.

[0065] 8 and 9, a hinge shaft Jz is connected to the backrest frame 400. The backrest frame 400 is connected to the base 100 via the hinge shaft Jz so as to be rotatable relative to the base 100. The linkage assembly further includes a transmission assembly 540 that is provided between the hinge shaft Jz and the first pulley 531 and is connected to the hinge shaft Jz and the first pulley 531, respectively, so as to transmit power to the first pulley 531 and rotate the first pulley 531 when the backrest frame 400 rotates.

[0066] When the backrest frame 400 rotates, the hinge shaft Jz connected to the backrest frame 400 rotates to operate the transmission assembly 540, and the first pulley 531 rotates via the transmission assembly 540.

[0067] Here, the transmission assembly 540 may be a gear transmission assembly. For example, the gear transmission assembly includes a gear 541 located on one side of the first pulley 531 and coaxially connected to the first pulley 531, and a toothed transmission member 542 having a mating portion and a transmission portion extending radially from the mating portion. One end of the transmission portion away from the mating portion is provided with meshing teeth. The mating portion is fitted onto and fixed to a hinge shaft connected to the backrest frame 400, and the transmission portion meshes with the gear 541 through the meshing teeth. Alternatively, the transmission assembly may be another transmission assembly such as a pulley transmission assembly.

[0068] In this embodiment, the armrest 300 can be attached to the corresponding installation object by a sliding support structure, whether it is installed on the framework 510, the base 100, the seat 200 or the mounting bracket.

[0069] For example, in some embodiments, as shown in FIGS. 1 and 3, the chair further comprises a sliding support assembly 700 coupled to the armrest 300 for supporting the sliding movement of the armrest 300.

[0070] A sliding support assembly 700 is provided on an installation object (for example, the framework 510, the base 100, the seat 200, or a mounting bracket) on which the armrest 300 is to be installed. The armrest 300 is slidably attached to the installation object by being connected to the sliding support assembly 700. That is, the armrest 300 can slide on the installation object due to the structure of the provided sliding support assembly 700.

[0071] Here, the sliding support assembly 700 may be a sliding rod / sliding bush assembly. As shown in FIG. 3 , the sliding rod / sliding bush assembly includes a sliding bar 710 attached to the installation object and positioned on the side of the installation object, and a sliding sleeve 720 fitted onto the sliding bar 710 and slidable along the sliding bar 710. The length of the sliding bar 710 is the same as the front-to-rear direction of the installation object. The armrest 300 is connected to the sliding sleeve 720. Alternatively, the sliding support assembly may be another sliding assembly such as a chute / slider assembly. For example, the installation object is configured with a chute extending in the front-to-rear direction of the installation object. A slider is attached within the chute and slidably engages with the chute and is connected to the armrest 300. The above is merely an example and is not limiting. Any structure capable of supporting the sliding of the armrest 300 may be used as the sliding support assembly.

[0072] 10 and 11 , the linkage mechanism 500 further includes a linkage member 550 disposed between the linkage assembly and the armrest 300. Here, the linkage assembly is connected to the armrest 300 by being coupled to the linkage member 550. The linkage member 550 is used to operate the armrest 300, which is slidable relative to the linkage member 550. An elastic member 560 is disposed between the linkage member 550 and the armrest 300, for applying an elastic force acting on the armrest 300 and returning the armrest 300 relative to the linkage member 550.

[0073] Specifically, the interlocking assembly establishes an interlocking relationship with the armrest 300 via the interlocking member 550, and a cooperative operating mechanism exists between the three. When the backrest frame 400 receives an external force and rotates, the interlocking assembly transmits the force to the interlocking member 550, which then moves the armrest 300. The structural form of the interlocking assembly can be determined with reference to the above-described embodiments. For example, the interlocking assembly may include a link assembly 520 or a pulley assembly 530. When the interlocking assembly includes the link assembly 520, the third link 523 of the link assembly 520 may be connected to the interlocking member 550. When the interlocking assembly includes the pulley assembly 530, the wire 533 of the pulley assembly 530 may be connected to the interlocking member 550.

[0074] The interlocking member 550 may have various structural forms. For example, as shown in FIGS. 10 and 11 , the interlocking member 550 includes an interlocking sleeve fitted onto the slide bar 710 and slidable along the slide bar 710. The portion of the armrest 300 fitted onto the slide bar 710 is accommodated in the inner space of the interlocking sleeve. One or more slide bars 710 may be provided, but this is not limited thereto. When the backrest frame 400 rotates, the movement is transmitted to the interlocking assembly, which pulls the interlocking sleeve and slides it along the slide bar 710. The interlocking sleeve correspondingly pushes the armrest 300, causing it to slide along the slide bar 710, thereby moving the armrest 300. The armrest 300 can also slide on the slide bar 710 relative to the interlocking sleeve within the inner space of the interlocking sleeve. This allows the relative position of the armrest 300 to be adjusted, providing flexible countermeasures against unexpected situations such as pinching.

[0075] The elastic member 560 serves to return the armrest 300 to the interlocking member 550 after the armrest 300 is moved relative to the interlocking member 550 under an external force and the external force is released. The elastic member 560 may be a spring, depending on the structure of the interlocking sleeve used by the interlocking member 550. The elastic member 560 is accommodated in the inner space of the interlocking sleeve and is correspondingly fitted onto the slide bar 710. Both ends of the elastic member 560 abut against the inner wall of the interlocking sleeve and the armrest 300, respectively. Alternatively, two elastic members 560 may be provided. The two elastic members 560 may be installed on both sides of the armrest 300 along the length of the slide bar 710.

[0076] Depending on the specific location of use, if an unexpected situation occurs, such as the armrest 300 pinching a hand while it is moving (e.g., rearward) relative to the backrest frame 400, the armrest 300 elastically clamps the hand due to the structural settings of the interlocking member 550 and the elastic member 560, preventing pinching and injury to the hand. Furthermore, the user can move the armrest 300 relative to the interlocking member 550 and quickly remove their hand. Furthermore, when the user releases the armrest 300, the armrest 300 returns to its original supporting position due to the action of the elastic member 560, making it convenient to use.

[0077] The above description is merely a part or preferred embodiment of the present application, and the protection scope of the present application cannot be limited by the text or drawings. Based on the overall concept of the present application, equivalent structural modifications made using the contents of the specification and drawings of the present application, or directly / indirectly operating in other related technical fields, are all included in the protection scope of the present application.

Claims

1. With the base, a seat portion provided on the base; Armrests provided on the sides of the seat; a backrest frame pivotally connected to the base; a linkage mechanism that is connected to the armrest and linked to the backrest frame, and that moves the armrest by the linkage mechanism when the backrest frame rotates.

2. the linkage mechanism further includes a framework that is operably connected to the base, is transmission-connected to the backrest frame, and is operable along with the backrest frame when the backrest frame rotates; 2. The chair of claim 1, wherein the armrests are attached to the framework.

3. The armrest is provided slidably relative to the skeleton, 3. The chair of claim 2, wherein the linkage mechanism further comprises a linkage assembly coupled to the armrest for sliding the armrest on the framework as the back frame rotates.

4. the interlocking assembly comprises a link assembly; 4. The chair of claim 3, wherein the link assembly is provided on the frame or the seat, one end of the link assembly being hinged to the base and the other end of the link assembly being hinged to the armrest.

5. the link assembly includes a first link, a second link, and a third link; the second link is rotatably provided on the framework or the seat, and is disposed between the first link and the third link; 5. The chair of claim 4, wherein one end of the first link is hingedly connected to the base, the other end is hingedly connected to one end of the second link, the other end of the second link is hingedly connected to one end of the third link, and the other end of the third link is hingedly connected to the armrest.

6. The first link is disposed at an angle to the second link, the first link includes a base connecting arm and a link connecting arm; an end of the base connecting arm that is remote from the link connecting arm is hingedly connected to the base; an end of the link connecting arm that is remote from the base connecting arm is hingedly connected to the second link; The chair of claim 5, wherein the width of the link connecting arm is greater than the width of the base connecting arm, and / or the first link has reinforcing ribs protruding from both opposing surfaces in its thickness direction, the reinforcing ribs being attached to the base connecting arm and extending at least partially to the link connecting arm.

7. the first link is elastically deformable; and / or 7. The chair according to claim 6, wherein the third link is elastically deformable.

8. a mounting bracket coupled to the base; the armrest is slidably mounted on the base, the seat, or the mounting bracket; the linkage mechanism comprises a linkage assembly; 2. The chair of claim 1, wherein the linkage assembly is coupled to the armrest and causes the armrest to slide relative to the base, the seat, or the mounting bracket when the back frame rotates.

9. the linkage assembly comprises a pulley assembly; the pulley assembly includes a first pulley rotatably mounted on the base, a second pulley, and a wire wound around the first pulley and the second pulley; 9. The chair according to claim 3 or 8, wherein the first pulley is drivingly connected to the back frame, and the armrest is fixedly connected to the wire and is actuatable by the wire.

10. A hinge shaft is connected to the backrest frame, the backrest frame is connected to the base via the hinge shaft and is rotatably connected to the base; the linkage assembly further comprises a transmission assembly; 10. The chair according to claim 9, wherein the transmission assembly is provided between the hinge shaft and the first pulley, is connected to the hinge shaft and the first pulley, and transmits power to the first pulley when the backrest frame rotates, thereby rotating the first pulley.

11. 9. The chair of claim 3 or 8, further comprising a sliding support assembly connected to the armrest for supporting sliding of the armrest.

12. the linkage mechanism further comprises a linkage member disposed between the linkage assembly and the armrest; the linkage assembly is coupled to the linkage member for moving the armrest, and is coupled to the armrest so as to be slidable relative to the linkage member; An elastic member is provided between the linking member and the armrest, 9. The chair according to claim 3 or 8, wherein the elastic member acts on the armrest and applies an elastic force that returns the armrest to the interlocking member.

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