Chair

Abstract

SOLUTION: A base, a linkage frame 2 movably connected to the base and fixedly connected to a seat cushion 100 of a chair, and a backrest frame 3 rotatably connected to the base and drivingly connected to the linkage frame 2 for mounting a backrest 200 of the chair, wherein when the backrest frame 3 is rotated relative to the base, the linkage frame 2 and the seat cushion 100 move relative to the base. When the backrest frame 3 is rotated relative to the base, the linkage frame 2 and the seat cushion 100 are synchronously moved relative to the base.EFFECT: Through the connection between the linkage frame 2 and the base and / or the connection between the linkage frame 2 and the backrest frame 3, the movement of the seat cushion 100 can be controlled when the backrest 200 drives the seat cushion 100 to move, so that the seat cushion 100 can adaptively support the buttocks of the user according to the change of the rotation angle of the backrest frame 3, thereby improving the comfort of the chair.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 seen in places such as offices and study rooms, and can meet people's needs to sit and work, study or rest. A chair has components such as a support base, backrest, seat cushion, and headrest, and typically has an adjustment function in which the backrest can rotate relative to the support base when the user leans against it, allowing the user to change their sitting posture as needed when using the chair and reducing fatigue from sitting for long periods of time.

[0003] In related technology, a seat cushion can be connected to a backrest, and when the user rotates the backrest backward relative to the support base to lean against it, the tip of the seat cushion rises as the backrest rotates, supporting the user's buttocks when reclining. However, in conventional chairs, when the backrest is rotated to move the seat cushion, the tip of the seat cushion rises as the backrest rotates, causing the seat cushion to tilt too much, which makes the tip of the seat cushion more likely to press against the user's thighs and reduces the comfort of using the chair. Summary of the Invention [Problem to be solved by the invention]

[0004] The main object of the present invention is to propose a chair that improves the user's comfort in use. [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: With the base, an interlocking framework movably connected to the base and fixedly connected to a seat cushion of the chair; a backrest frame pivotally connected to the base and power-transmittingly connected to the interlocking framework, for mounting the backrest of the chair; When the back frame rotates relative to the base, it moves the interlocking framework and the seat cushion relative to the base.

[0006] In one embodiment, the interlocking framework comprises: a first connecting end movably connected to the base; and a second connecting end that is power-transmittingly connected to the backrest frame.

[0007] In one embodiment, the first connecting end is slidably connected to the base.

[0008] In one embodiment, a first guide groove is provided on one of the first connecting end and the base, and a first sliding member that can slide within the first guide groove is provided on the other, so that the interlocking skeleton and the seat cushion move relative to the base.

[0009] In one embodiment, the first guide groove includes a first segment and a second segment connected to each other, the first segment being installed diagonally upward toward the rear of the chair, and the second segment being installed diagonally upward toward the front of the chair.

[0010] In one embodiment, the first segment has a larger inclination angle relative to a plane perpendicular to the base than the second segment has a larger inclination angle relative to a plane perpendicular to the base.

[0011] In one embodiment, at least one of an end of the first segment remote from the second segment and an end of the second segment remote from the first segment is disposed in an opening.

[0012] In one embodiment, a second guide groove is provided on either the first connecting end or the base, and a second sliding member is provided on the other, the second guide groove extends in the front-rear direction of the base, and the second sliding member can slide within the second guide groove, thereby moving the interlocking skeleton and the seat cushion in the front-rear direction relative to the base.

[0013] In one embodiment, a first transmission member is provided, one end of which is connected to the base and the other end of which is connected to the first connecting end, and at least one of the first connecting end and the base is rotatably connected to the first transmission member.

[0014] In one embodiment, the first transmission member is provided inclined toward the front of the chair along the front-rear direction of the chair.

[0015] In one embodiment, the back frame is slidably connected to the second connecting end.

[0016] In one embodiment, a third guide groove is provided on either the second connecting end or the backrest frame, and the other is provided with the third sliding member, which can slide in the third guide groove, thereby moving the interlocking skeleton and the seat cushion relative to the base.

[0017] In one embodiment, the third guide groove extends along the longitudinal direction of the base so that the interlocking framework allows the seat cushion to move longitudinally relative to the base.

[0018] In one embodiment, a stop structure is provided on the side of the base facing the interlocking framework to limit the rotation angle of the interlocking framework relative to the base.

[0019] In one embodiment, the seat further includes a second transmission member having one end transmission-connected to the backrest frame and the other end rotatably connected to the base, the second transmission member being used to rotatably connect the second connecting end. [Effects of the Invention]

[0020] The backrest and seat cushion of the chair of the present invention form an interlocking structure by the interlocking skeleton and the backrest frame, and when the backrest frame rotates relative to the base, the interlocking skeleton and the seat cushion move synchronously relative to the base. The connection between the interlocking skeleton and the base and / or the connection between the interlocking skeleton and the backrest frame makes it possible to control the movement of the seat cushion when the backrest moves the seat cushion, and the seat cushion can adaptively support the user's buttocks according to changes in the rotation angle of the backrest frame, thereby improving the comfort of the chair. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a structural schematic diagram of a chair according to an embodiment of the present invention; [Figure 2] FIG. 10 is a structural schematic diagram of a chair according to another embodiment of the present invention. [Figure 3] 1 is a schematic structural view of a portion of a chair according to an embodiment of the present invention; [Figure 4] 3 is a structural schematic diagram of a first guide groove and a first guide member according to an embodiment of the present invention. FIG. [Figure 5] FIG. 10 is a structural schematic diagram of a chair according to yet another embodiment of the present invention. [Figure 6] 1 is a structural schematic diagram of a chair according to another embodiment of the present invention. The achievement of the objects, features of the functions and advantages of the present invention will be further explained in connection with the embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0022] 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.

[0023] It should be noted that all directional indications (e.g., up, down, left, right, forward, backward, 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.

[0024] 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.

[0025] 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.

[0026] An embodiment of the present invention provides a chair including the following configuration, with reference to FIGS. 1 to 3, wherein the chair: Base 1 and An interlocking framework 2 that movably connects the base 1 and fixedly connects it to the seat cushion 100 of the chair; The chair has a backrest frame 3 that is rotatably connected to the base 1 and further connected to the interlocking framework 2 for transmitting power thereto, and for attaching a backrest 200 of the chair. When the backrest frame 3 is rotated relative to the base 1, the backrest frame 3 moves the interlocking framework 2 and the seat cushion 100 relative to the base 1.

[0027] In this embodiment, the seat cushion 100 in the chair serves to provide support for the buttocks and thighs. Referring to Figures 1 and 3, the seat cushion 100 is usually located above the base 1 and is attached to the base 1. When a user uses the chair, the user's buttocks sit on the seat cushion 100, and the seat cushion 100 supports the buttocks, thighs, and other parts of the human body.

[0028] Among them, the seat cushion 100 is linked with the backrest frame 3 and the backrest 200, and the three are provided with a mutually cooperating operating mechanism. For example, when an external force acts on the backrest 200 toward the rear of the chair, the backrest frame 3 rotates toward the rear of the chair, causing the seat cushion 100 to move backward accordingly. The external force that moves the backrest 200 toward the rear of the chair may be pressure applied to the backrest 200 by the user, or may be a driving force from a driving means such as a motor or air cylinder provided in the chair. When the user leans back / lies back, a backward pressure is applied to the backrest 200, causing the backrest 200 to rotate backward following the backrest frame 3, and at the same time, the seat cushion 100 moves backward, thereby automatically adjusting the position according to the user's sitting posture.

[0029] When a forward external force acts on the backrest 200 or the backrest frame 3, the external force causes the backrest 200 to rotate the backrest frame 3 in a direction toward the front of the chair, or the external force acts directly on the backrest frame 3 to rotate the backrest frame 3 in a direction toward the front of the chair, causing the backrest frame 3 to move forward in response to the seat cushion 100. For example, when a user moves from a position leaning back / lying backward to a position sitting upright, the backrest 200 rotates forward following the backrest frame 3, and at the same time, the seat cushion 100 moves forward, thereby adjusting the position according to the user's sitting posture.

[0030] Furthermore, in this embodiment, an interlocking skeleton 2 is provided which is movably connected to the base 1 of the chair and to which the seat cushion 100 of the chair can be attached, and the interlocking skeleton 2 is power-transmittingly connected to the backrest frame 3, and when the backrest frame 3 rotates, it interlocks with the backrest frame 3 and drives the seat cushion 100 which is fixedly connected to the interlocking skeleton 2.

[0031] The interlocking framework 2 and the base 1 are connected by a movable connection, which may include a rotary connection, a sliding connection, or the like, or may be connected by a link structure. The interlocking framework 2 is connected to the base 1 in a movable manner, and therefore can move on the base 1 relative to the base 1, and the movable manner may include translation, rotation, etc.

[0032] The seat cushion 100 is attached to an interlocking framework 2 that supports the seat cushion 100, and is provided so as to follow the interlocking framework 2. That is, the seat cushion 100 is power-transmittingly connected to the backrest frame 3 via the interlocking framework 2, and an interlocking relationship between the backrest 200 and the seat cushion 100 is correspondingly formed. The interlocking framework 2 may be provided between the base 1 and the seat cushion 100, or the seat cushion 100 may be located above it and connected to the interlocking framework 2, or the interlocking framework 2 may be provided at the bottom of the seat cushion 100, and the seat cushion 100 may be attached by covering it with the interlocking framework 2, or the interlocking framework 2 may be part of the support structure of the seat cushion 100, and the support structure of the seat cushion 100 and the interlocking framework 2 may be provided integrally. The interlocking framework 2 may be referred to as a cushion framework, chassis framework, base framework, etc., and may have a plurality of different functions and installation modes.

[0033] The shape and structure of the interlocking framework 2 can be roughly frame-like, and fits the outer contour of the seat cushion 100. The interlocking framework 2 may be, but is not limited to, a one-piece molded structure or an assembly of multiple different members or parts.

[0034] The interlocking framework 2 and the backrest frame 3 are power-transmittingly connected. However, as shown in FIG. 3, the interlocking framework 2 and the backrest frame 3 may be directly connected to form a power-transmitting relationship therebetween. Alternatively, an intermediate connecting member is connected to the backrest frame 3, and the interlocking framework 2 connects to the intermediate connecting member, thereby realizing a connection with the backrest frame 3 and thus a power-transmitting relationship therebetween. The power-transmitting connection between the interlocking framework 2 and the backrest frame 3 may be in the form of a pivoting connection, a sliding connection, a hinge connection, or the like. Since the backrest frame 3 is power-transmittingly connected to the interlocking framework 2, when the backrest frame 3 rotates due to an external force, the backrest frame 3 moves the interlocking framework 2, thereby realizing a power transmission to the interlocking framework 2, and the interlocking framework 2 in turn connects to the seat cushion 100. The seat cushion 100 may move back and forth relative to the base 1 to adjust the position of the seat cushion 100. Alternatively, in adjusting the position of the seat cushion 100, the seat cushion 100 can be rotated relative to the base 1 to adjust the angle of the seat cushion 100.

[0035] By providing a chair of the above configuration, when the backrest 200 is subjected to an external force, the backrest frame 3 can rotate relative to the base 1 in the front-to-back direction of the chair due to the external force, and the interlocking skeleton 2 moves forward or backward in conjunction with the backrest frame 3, and the seat cushion 100 connected to the interlocking skeleton 2 moves forward or backward, so that the position of the seat cushion 100 can be automatically adjusted to match the user's sitting posture.

[0036] Referring to FIG. 3, in some embodiments, the interlocking framework 2 according to the embodiment of the present invention has a first connecting end 21 that movably connects the base 1 and a second connecting end 22 that transmits and connects the backrest frame 3.

[0037] In this embodiment, the first connecting end 21 and the second connecting end 22 may be front and rear ends of the interlocking framework 2 arranged along the front-rear direction of the chair or along the front-rear direction of the base 1 .

[0038] In addition, the first connecting end 21 of the interlocking skeleton 2 may be movably connected to the base 1, and the second connecting end 22 of the interlocking skeleton 2 may be power-transmittingly connected to the backrest frame 3, so that the interlocking skeleton 2 can be moved in the forward and backward directions relative to the base 1 by driving the backrest frame 3.

[0039] Since the backrest frame 3 and the base 1 are pivotally connected, the first connecting end 21 of the interlocking skeleton 2 is movably connected to the base 1, and the second connecting end 22 of the interlocking skeleton 2 is power-transmittingly connected to the backrest frame 3, thereby forming a link mechanism among the backrest frame 3, the base 1, and the interlocking skeleton 2, and they have a relatively determined motion relationship. Therefore, the existence of this link mechanism allows the interlocking skeleton 2 to perform a limited motion trajectory and a corresponding motion movement. In other words, when the backrest frame 3 rotates, the interlocking skeleton 2 moves accordingly along a specified motion trajectory, and the corresponding motion movement is executed.

[0040] For example, when using a chair, a user sits on the seat cushion 100. When the user leans back / lies back and the backrest frame 3 rotates backward (e.g., counterclockwise), the backrest frame 3 transmits the motion of the interlocking skeleton 2, and the interlocking skeleton 2 moves the seat cushion 100 backward and rotates it in the first direction, thereby appropriately adjusting the position and angle of the seat cushion 100 so that the seat cushion 100 fits the position of the user's buttocks when the user leans back / lies back. When the user moves from a leaning / lying back position to a sitting upright position, the backrest frame 3 rotates forward (for example, clockwise), and the backrest frame 3 transmits the movement to the interlocking skeleton 2, which then moves the seat cushion 100 forward and rotates it in a second direction (the opposite direction to the first direction). As the user moves from a leaning / lying back position to a sitting upright position, the position and angle of the seat cushion 100 are appropriately adjusted so that the seat cushion 100 fits the position of the user's buttocks.

[0041] The movable connection between the first connecting end 21 of the interlocking skeleton 2 and the base 1 may be a single connection point. For example, the first connecting end 21 of the interlocking skeleton 2 may have a single connection point, and the base 1 is connected to this single connection point, thereby enabling a single-point connection with the interlocking skeleton 2. Optionally, a single connection point may be provided at the center line of the interlocking skeleton 2. That is, the connection point is provided at the center line of the interlocking skeleton 2. Alternatively, the movable connection between the first connecting end 21 of the interlocking skeleton 2 and the base 1 may be a multi-point connection. That is, the first connecting end 21 of the interlocking skeleton 2 and the base 1 are connected to multiple connection points, for example, the first connecting end 21 of the interlocking skeleton 2 may have multiple connection points. The base 1 is connected to each of the multiple connection points, thereby achieving a multi-point connection with the first connecting end 21 of the interlocking skeleton 2. The number of connection points is determined according to the number of connection points. For example, two connection parts may be provided on each side in the width direction, i.e., two connection points may be provided on each side in the width direction, symmetrically arranged in the horizontal direction with respect to the center position of the interlocking skeleton 2. When connecting the first connecting end 21 of the interlocking skeleton 2 to the base 1 at multiple points, the connection form and structure of each connection point should be the same so as to refine and smooth the movement of the interlocking skeleton 2.

[0042] 3, the second connecting end 22 of the interlocking framework 2 is power-transmittingly connected to the backrest frame 3. The second connecting end 22 of the interlocking framework 2 may be directly connected to the backrest frame 3, thereby establishing a power-transmitting relationship between them. Alternatively, an intermediate connecting member as described in the above embodiment may be connected to the backrest frame 3, and the second connecting end 22 of the interlocking framework 2 may be connected to this intermediate connecting member. The interlocking framework 2 is connected to the backrest frame 3, thereby establishing a power-transmitting relationship between them.

[0043] Alternatively, as shown in Fig. 2, a second connecting end 22 of the interlocking framework 2 may be power-transmittingly connected to the backrest bracket 3 by an intermediate connecting member, one end of this second transmitting member 6 being power-transmittingly connected to the backrest bracket 3 and the other end being rotatably connected to the base 1, and a second transmitting member 6 may be provided to rotatably connect the second connecting end 22. The power-transmitting connection may be adopted whether the interlocking framework 2 is directly connected to the backrest frame 3 or whether the interlocking framework 2 is connected to the backrest frame 3 via the second transmitting member 6.

[0044] Furthermore, the second transmission member 6 may be directly connected at one end to the backrest frame 3 so as to establish a power transmission relationship between the second transmission member 6 and the backrest frame 3. Alternatively, a separate intermediate connecting member may be provided, and the second transmission member 6 may be connected to the backrest frame 3 via the intermediate connecting member, one end of which is connected to the backrest 200 and the other end of which is connectable to the backrest frame 3, and the second transmission member 6 may be connected to the intermediate connecting member to achieve a power transmission connection with the backrest frame 3, and the intermediate connecting member may be a link or a drive motor.

[0045] The connection between the second connecting end 22 of the interlocking framework 2 and the second transmission member 6 or the backrest frame 3 may be a single-point connection or a multi-point connection, and the connection form is based on the same principle as the connection form between the first connecting end 21 of the interlocking framework 2 and the base 1 described above, so a description thereof will be omitted. Correspondingly, when the second connecting end 22 of the interlocking framework 2 is connected at multiple points with the intermediate connecting member or the backrest frame 3, the connection form and connection structure of each connection point are set to be the same so that the interlocking framework 2 can move precisely and smoothly.

[0046] Continuing to refer to FIG. 3, the first connecting end 21 according to the embodiment of the present invention is slidably connected to the base 1 as one of the preferred embodiments in which the first connecting end 21 is movably connected to the base 1.

[0047] In this embodiment, the second connecting end 22 of the interlocking skeleton 2 is hingedly connected to the backrest frame 3, and optionally, the second connecting end 22 of the interlocking skeleton 2 is provided with a hinge structure that is hingedly connected to the backrest frame 3.

[0048] 3, the second connecting end 22 of the interlocking framework 2 is hingedly arranged to the backrest frame 3 by a hinge structure so as to be capable of transmitting power. As an example, the hinge structure of the interlocking framework 2 and the backrest frame 3 are connected via a hinge shaft, thereby forming a hinge between the second connecting end 22 of the interlocking framework 2 and the backrest frame 3. Two hinge structures may be provided, and the two hinges may be provided opposite each other on both sides in the width direction of the interlocking framework 2, both of which are abutted against the backrest frame 3 and each of which is connected by a hinge shaft passing through. When the backrest frame 3 rotates, the second connecting end 22 of the interlocking skeleton 2 can be moved, and since the second connecting end 22 of the interlocking skeleton 2 and the backrest frame 3 are connected by a hinge, the second connecting end 22 of the interlocking skeleton 2 can rotate relative to the backrest frame 3 during movement, so that the movements of the interlocking skeleton 2 and the backrest frame 3 correspond to each other and it is possible to avoid the occurrence of interlocking snagging.

[0049] The interlocking framework 2 is movably mounted on the chair base 1 by having the first connecting end 21 slidably connected to the chair base 1. The first connecting end 21 of the interlocking framework 2 and the chair base 1 may be slidably connected by a sliding structure of groove and shaft engagement.

[0050] Specifically, as a preferred embodiment of the first connecting end 21 slidingly connected to the base 1 of the chair, referring to Figures 2 and 3, one of the first connecting end 21 and the base 1 according to the embodiment of the present application is provided with a first guide groove 4. The other is provided with a first sliding member 5 that can slide within the first guide groove 4. This allows the interlocking skeleton 2 and the seat cushion 100 to move relative to the base 1.

[0051] In an example where a first guide groove 4 is provided in the first connecting end 21 and a first sliding member 5 is provided in the base 1, the first guide groove 4 extends in the front-to-rear direction of the chair and a first sliding member 5 is inserted into the first guide groove 4, which slides and engages with the first guide groove 4, and the first sliding member 5 connects the base 1 of the chair. An intermediate connecting member that forms the first guide groove 4 may be provided, and the first guide groove 4 of the intermediate connecting member and the first sliding member 5 may be slidably connected to achieve a sliding connection between the first connecting end 21 and the base 1. This intermediate connecting member can be connected separately from the first connecting end 21. When the interlocking skeleton 2 moves in conjunction with the backrest frame 3, the interlocking skeleton 2 moves and the first guide groove 4 slides relative to the first sliding member 5, and the first sliding member 5 remains stationary relative to the base 1.

[0052] When the user moves from a reclining / lying back position to a sitting upright position, the backrest frame 3 rotates on the base 1 relative to the base 1, and during the rotation, the second connecting end 22 of the interlocking skeleton 2 moves together with the first guide groove 4 of the first connecting end 21, sliding against the first sliding member 5, thereby moving the tip of the interlocking skeleton 2, which moves the interlocking skeleton 2 relative to the base 1 in the front-to-rear direction of the seat, and ultimately moves the seat cushion 100 along with it. This allows the position or angle of the seat cushion 100 to be adjusted for different backrests 200.

[0053] Among these, the first guide groove 4 extends in the front-to-rear direction of the chair, and the first sliding member 5 is inserted into the first guide groove 4 and slides within the first guide groove 4 so that the first connecting end 21 of the interlocking skeleton 2 has a specified moving trajectory in the front-to-rear direction of the chair. When the interlocking skeleton 2 moves, the first guide groove 4 provided in the interlocking skeleton 2 slides relative to the first sliding member 5, and the first connecting end 21 of the interlocking skeleton 2 moves along the specified moving trajectory, thereby allowing the seat cushion 100 to perform a corresponding moving operation. By designing the groove shape of the first guide groove 4, a specific moving trajectory can be set for the interlocking skeleton 2, and a specific moving operation can be given to the seat cushion 100.

[0054] Specifically, referring to FIG. 4, in some embodiments, the first guide groove 4 includes a first segment 41 and a second segment 42 connected to each other, the first segment 41 being installed diagonally upward toward the rear side of the chair, and the second segment 42 being installed diagonally upward toward the front side of the chair.

[0055] In this embodiment, the first guide groove 4 has a first segment 41 and a second segment 42 connected to each other. The first segment 41 and the second segment 42 are inclined in opposite directions. Among these, the first segment 41 is inclined toward the front and upper side, and the second segment 42 is inclined toward the rear and upper side along the front-to-rear direction of the chair. When the first guide groove 4 and the first sliding member 5 slide relative to each other, the first sliding member 5 can slide back and forth relatively between the first segment 41 and the second segment 42. That is, the groove shape of the first guide groove 4 is substantially V-shaped, and the sliding locus of the first sliding member 5 relative to the first guide groove 4 is a substantially V-shaped sliding locus.

[0056] At the transition point where the first segment 41 meets the second segment 42, it is preferable to provide a smooth transition segment so that the first sliding member 5 can transition smoothly between the two segments and to avoid a clicking sensation caused by an excessively abrupt change in angle of the transition segment when the first sliding member 5 transitions between the two segments.

[0057] When the user leans back / lies back, the backrest frame 3 rotates backward (for example, counterclockwise), pulling the second connecting end 22 of the interlocking skeleton 2, causing the entire interlocking skeleton 2 to move backward. In the process, the position of the second connecting end 22 of the interlocking skeleton 2 drops, and the first guide groove 4 does not move at the first connecting end 21 of the interlocking skeleton 2 (corresponding to the front of the seat cushion 100), and the first sliding member 5 moves relative to the first guide groove 4 (in reality, the first guide groove 4 moves but the first sliding member 5 is stationary; here, for the purpose of explaining the movement procedure, it is assumed that the first guide groove 4 is stationary). The first sliding member 5 slides relative to the first segment 41 of the first guide groove 4 and pushes up the first connecting end 21 of the interlocking skeleton 2, causing the seat cushion 100 to change angle and gradually tilt backward (incline backward). Then, the first sliding member 5 slides from the first segment 41 to the second segment 42 and continues to slide along the second segment 42. As the position of the first connecting end 21 of the interlocking skeleton 2 becomes lower, the backward tilt angle of the seat cushion 100 gradually decreases. That is, in the process of the user leaning backward / lying down, the position of the rear part of the seat cushion 100 decreases, while the position of the front part of the seat cushion 100 first rises and then falls down. As the position of the front part of the seat cushion 100 decreases, the step between the front part of the seat cushion 100 and the rear part of the seat cushion 100 becomes smaller, and the entire seat cushion 100 moves to a state close to horizontal, thereby reducing the backward tilt angle of the seat cushion 100. This prevents the seat cushion 100 from leaning back too much, which causes the buttocks to thrust forward, and allows the user to lie down as much as possible when resting in a reclined position, contributing to improved comfort when the user uses the seat.

[0058] On the other hand, when the user moves from a position leaning back / lying backward to a position sitting upright, the backrest frame 3 rotates forward (for example, clockwise) and pushes the second connecting end 22 of the interlocking skeleton 2, thereby moving the entire interlocking skeleton 2 forward. During this process, the second connecting end 22 of the interlocking skeleton 2 rises, and the first sliding member 5 starts to slide along the first guide groove 4 at the first connecting end 21 (corresponding to the front of the seat cushion 100) of the interlocking skeleton 2. The first sliding member 5 slides first along the second segment 42, so that the position of the first connecting end 21 of the interlocking skeleton 2 drops, and then the first sliding member 5 slides from the second segment 42 to the first segment 41 and continues to slide along the first segment 41, so that the position of the first connecting end 21 of the interlocking skeleton 2 is raised. In other words, during the process of the user moving from a position leaning back / lying backward to a position sitting upright, the rear part of the seat cushion 100 rises, while the front part of the seat cushion 100 drops first and then rises. As the position of the front part of the seat cushion 100 rises, the step between the front part of the seat cushion 100 and the rear part of the seat cushion 100 becomes smaller, and the entire seat cushion 100 moves to a nearly horizontal state.

[0059] Referring to Figure 4, as one of the preferred installation modes of the first segment 41 and the second segment 42 in the above-described embodiment, and continuing to refer to Figure 6, the inclination angle of the first segment 41 in this embodiment of the present invention relative to the vertical plane 1A of the base 1 is greater than the inclination angle of the second segment 42 relative to the vertical plane 1A of the base 1.

[0060] In the first guide groove 4, the inclination angle of the first segment 41 and the inclination angle of the second segment 42 are different with respect to the vertical plane 1A of the base 1 (or the inclination of the first segment 41 and the inclination or the inclination of the second segment 42 may be defined as being different). Alternatively, the inclination angle of the first segment 41 is larger than the inclination angle of the second segment 42; that is, as shown in FIG. 4 , the angle of the first included angle 4B between the first segment 41 and the vertical plane 1A of the base 1 is larger than the angle of the second included angle 4A between the second segment 42 and the vertical plane 1B of the base 1.

[0061] When the user leans back / lies down, the first connecting end 21 at the front end of the interlocking skeleton 2 (corresponding to the front part of the seat cushion 100) moves to slide the first sliding member 5 relative to the first segment 41. Because the inclination angle of the first segment 41 is relatively large, the speed of the angle change of the seat cushion 100 becomes relatively fast. During this process, the front part of the seat cushion 100 rises rapidly, and when the user sits up, the seat cushion 100 hits the human body, preventing the human body from sliding forward. This prevents the buttocks from slipping off the seat cushion 100. After that, the first sliding member 5 slides relative to the first segment 41 to the second segment 42, and continues to slide relative to the second segment 42. Because the inclination angle of the second segment 42 is relatively small, the speed of the angle change of the seat cushion 100 becomes relatively slow. During this process, the position of the human body on the seat cushion 100 becomes almost stable, reducing the discomfort that may occur when the front part of the seat cushion 100 slowly drops.

[0062] The groove shape of the first guide groove 4 may be other shapes such as a circular arc chute in addition to the V-shaped chute described above.

[0063] Alternatively, the first guide groove 4 is open at least on one of its ends. For example, as shown in FIG. 4 , in the front-rear direction of the base 1, the front end of the first guide groove 4 is open, and the rear end of the first guide groove 4 is closed. The opening 43 provided in the first guide groove 4 serves to allow the first sliding member 5 to enter and exit the first guide groove 4, thereby enabling the modular attachment and detachment of the seat cushion 100 and the interlocking skeleton 2 to the base 1. When attaching the base 1, the first sliding member 5 is inserted into the first guide groove 4 through the opening 43, and the tip of the interlocking skeleton 2 is slidably connected to the base 1, thereby attaching the base 1. When removing the base 1, the first sliding member 5 is removed from the first guide groove 4 through the opening 43, canceling the sliding connection between the interlocking skeleton 2 and the base 1, and the base 1 is then removed.

[0064] 5, as another preferred embodiment of the first connecting end 21 slidingly connecting to the base 1 of the chair, in some embodiments, a second guide groove 7 is provided on one of the first connecting end 21 and the base 1. The other is provided with a second guide groove 7 extending in the front-rear direction of the base 1. The second sliding member 8 slides in the second guide groove 7, causing the interlocking framework 2 and the seat cushion 100 to move back and forth relative to the base 1.

[0065] In this embodiment, a second guide groove 7 is provided on one of the first connecting end 21 of the interlocking skeleton 2 and the base 1, and a second sliding member 8 that fits into the second guide groove 7 extending in the front-to-rear direction of the chair is provided on the other. The second sliding member 8 is inserted into the second guide groove 7 and slidably engages with the second guide groove 7, and the first connecting end 21 of the interlocking skeleton 2 and the base 1 are slidably connected by the sliding engagement between the second sliding member 8 and the second guide groove 7.

[0066] A second guide groove 7 may be provided at the first connecting end 21 of the interlocking skeleton 2, a second sliding member 8 may be provided on the base 1, and the second sliding member 8 on the base 1 may be inserted into and slidably engaged with the second guide groove 7 at the first connecting end 21 of the interlocking skeleton 2. The second guide groove 7 is a linear sliding groove. The first connecting end 21 of the interlocking skeleton 2 and the base 1 may be connected by a link structure other than a sliding connection. Note that the second sliding member 8 may be provided at the first connecting end 21 of the interlocking skeleton 2, and the second guide groove 7 may be provided in the base 1.

[0067] As shown in FIG. 4, in an embodiment in which the backrest frame 3 slides and connects the second connecting end 22, a third guide groove 12 is provided on one side of the second connecting end 22 and the backrest frame 3, and a third sliding member 13 is provided on the other side. The third sliding member 13 slides in the third guide groove 12 to move the interlocking framework 2 and the seat cushion 100 relative to the base 1.

[0068] The third guide groove 12 extends along the vertical direction of the base 1 so that the interlocking framework 2 moves the seat cushion 100 relative to the base 1 in the vertical direction.

[0069] A third guide groove 12 is provided on one of the second connecting end 22 of the interlocking framework 2 and the backrest frame 3, and a third sliding member 13 that fits into the third guide groove 12 extending in the vertical direction of the chair is provided on the other. The third sliding member 13 is inserted into the third guide groove 12 and slidably engages with it, and the sliding engagement between the third sliding member 13 and the third guide groove 12 slidably connects the second connecting end 22 of the interlocking framework 2 and the backrest frame 3.

[0070] A third guide groove 12 may be provided at the second connecting end 22 of the interlocking skeleton 2, and a third sliding member 13 may be provided on the backrest frame 3, and the third sliding member 13 on the backrest frame 3 may be inserted into and slidably engaged with the third guide groove 12 at the second connecting end 22 of the interlocking skeleton 2. Optionally, the third guide groove 12 is a linear sliding groove.

[0071] When the user leans back or moves from a leaning back position to a sitting upright position, the backrest frame 3 rotates on the base 1 relative to the base 1, and when the backrest frame 3 rotates, the third sliding member 13 abuts against the groove wall of the third guide groove 12, driving the second connecting end 22 of the interlocking skeleton 2, causing the second sliding member 8 to slide along the second guide groove 7, moving the first connecting end 21 of the interlocking skeleton 2, which moves the interlocking skeleton 2 relative to the base 1 in the front-to-back direction of the chair, and ultimately moving the seat cushion 100 along with it. This allows the position and angle of the seat cushion 100 to be adjusted for different backrests 200.

[0072] 5, the base 1 is provided with an abutment stop structure 1B facing the interlocking skeleton 2, against which the interlocking skeleton 2 abuts so as to define the rotation angle of the interlocking skeleton 2. This abutment stop structure 1B may be, for example, one that is integrally formed with the base 1 on which the abutment stop structure 1B protruding toward the interlocking skeleton 2 is provided, or may be one that is connected to the base 1, such as by including an abutment stop member detachably provided on the base 1.

[0073] When the user leans back / lies back, the backrest frame 3 rotates backward (for example, rotates counterclockwise), and when the third sliding member 13 abuts against the groove wall of the third guide groove 12 during rotation, it pulls the second connecting end 22 of the interlocking skeleton 2, causing the entire interlocking skeleton 2 to move backward, and in the process, the position of the second connecting end 22 of the interlocking skeleton 2 drops, and when the second sliding member 8 slides along the second guide groove 7, the position of the first connecting end 21 of the interlocking skeleton 2 (corresponding to the front of the seat cushion 100) rises relatively, and the angle of the seat cushion 100 changes and gradually tilts backward (i.e., tilts backward). The abutment stop structure 1B is located in the backward tilting direction of the seat cushion 100. When the interlocking skeleton 2 comes into contact with the abutment stop structure 1B during the backward tilting process of the seat cushion 100, the abutment stop structure 1B forms an abutment stop against the interlocking skeleton 2, preventing the seat cushion 100 from tilting backward and preventing the backward tilt angle from changing. The third sliding member 13 abuts against the groove wall of the third guide groove 12 and maintains the tension on the second connecting end 22 of the interlocking skeleton 2, and the second sliding member 8 slides along the second guide groove 7, causing the entire interlocking skeleton 2 to move backward. In other words, the seat cushion 100 remains backward and the backward tilt angle does not change, so the backward tilt angle of the seat cushion 100 becomes smaller, preventing the seat cushion 100 from tilting backward too much and causing the buttocks to thrust forward. This has the effect of allowing the user to lie down as much as possible when resting on the seat, contributing to improving the comfort of the user when using the seat.

[0074] On the other hand, when the user moves from a position leaning back / lying backward to a position sitting upright, the backrest frame 3 rotates forward (for example, rotates clockwise), and as it rotates, the third sliding member 13 abuts against the groove wall of the third guide groove 12, pushing the second connecting end 22 of the interlocking skeleton 2, causing the entire interlocking skeleton 2 to move forward, and in the process, the second connecting end 22 of the interlocking skeleton 2 rises up, and the second sliding member 8 slides along the second guide groove 7 at the first connecting end 21 of the interlocking skeleton 2 (corresponding to the front of the seat cushion 100), causing the first connecting end 21 of the interlocking skeleton 2 to move relatively lower, the angle of the seat cushion 100 changes from a backward tilting to a horizontal position, and the position of the seat cushion 100 as a whole also moves forward.

[0075] Referring to Figure 6, as another preferred embodiment in which the first connecting end 21 is movably connected to the base 1, a chair according to an embodiment of the present invention includes a first transmission member 9 having one end connected to the base 1 and the other end connected to the first connecting end 21.

[0076] At least one of the first connecting end 21 and the base 1 pivotally connects the first transmission member 9 .

[0077] A first transmission member 9 is provided between the first connecting end 21 of the interlocking framework 2 and the base 1, but there may be only one first transmission member 9, with one end of this first transmission member 9 fixedly connected to the interlocking framework 2 and the other end of the first transmission member 9 connected to the base 1 by a hinge, or one end of this first transmission member 9 fixedly connected to the interlocking framework 2 and the other end of the first transmission member 9 connected to the base 1 by a hinge. Note that a hinge connects the second connecting end 22 of the interlocking framework 2 to the backrest frame 3, thereby achieving a movable connection. Note that the hinge structure between the second connecting end 22 of the interlocking framework 2 and the backrest frame 3 can be established with reference to the above embodiment, and will not be described in detail here. When the backrest frame 3 rotates, the second connecting end 22 of the interlocking skeleton 2 can be moved, and since the second connecting end 22 of the interlocking skeleton 2 and the backrest frame 3 are connected by a hinge, the second connecting end 22 of the interlocking skeleton 2 can rotate relative to the backrest frame 3 during movement, so that the movements of the interlocking skeleton 2 and the backrest frame 3 correspond to each other and it is possible to avoid the occurrence of interlocking snagging.

[0078] When a user leans back / lies down, or when the user moves from a leaning back / lies down position to a sitting upright position, the backrest frame 3 rotates on the base 1 relative to the base 1, and during the rotation, the second connecting end 22 of the interlocking skeleton 2 moves in conjunction with the rotation, and the first transmission member 9 rotates to support the operation of the first connecting end 21 of the interlocking frame 2, so that the interlocking skeleton 2 moves relative to the base 1 in the front-rear direction of the base 1, and thus moves the seat cushion 100 along with it. This allows the position and / or angle of the seat cushion 100 to be adjusted for different backrests 200.

[0079] Alternatively, in the initial state, the first transmission member 9 is provided tilted forward along the front-to-rear direction of the chair, and the connection point between the first transmission member 9 and the first connecting end 21 of the interlocking skeleton 2 is located forward of the connection point between the first transmission member 9 and the base 1. The tilt angle of the first transmission member 9 is set to 10° to 30°. As shown in FIG. 6, the tilt angle of the first transmission member 9 is preferably 20°.

[0080] When the user leans back / lies down, the backrest frame 3 rotates backward (e.g., rotates counterclockwise), pulling the second connecting end 22 of the interlocking skeleton 2, causing the entire interlocking skeleton 2 to move backward; in the process, the second connecting end 22 of the interlocking skeleton 2 lowers, and the first transmission member 9 rotates backward (e.g., rotates counterclockwise) at the first connecting end 21 of the interlocking skeleton 2 (corresponding to the front of the seat cushion 100), and the connection point between the first transmission member 9 and the first connecting end 21 of the interlocking skeleton 2 gradually rises, so that the position of the first connecting end 21 of the interlocking skeleton 2 rises relatively, and the angle of the seat cushion 100 changes and gradually leans backward (tilts backward); the connection point between the first transmission member 9 and the first connecting end 21 of the interlocking skeleton 2 immediately descends after passing the highest point, so the position of the first connecting end 21 of the interlocking skeleton 2 lowers, and the backward tilt angle of the seat cushion 100 gradually decreases. That is, in the process of the user leaning back / lying down, the rear part of the seat cushion 100 moves down, while the front part of the seat cushion 100 moves up and then down first. As the front part of the seat cushion 100 moves down, the difference in level between the front and rear parts of the seat cushion 100 becomes smaller, and the entire seat cushion 100 moves to a nearly horizontal state, thereby reducing the angle of backward tilt of the seat cushion 100, preventing the seat cushion 100 from leaning back too much and causing the buttocks to thrust forward. This has the effect of allowing the user to lie down as much as possible when resting in a reclined position, and contributes to improving the comfort of the user when using the seat.

[0081] On the other hand, when the user moves from a position leaning back / lying backward to a position sitting upright, the backrest frame 3 rotates forward (for example, clockwise) and pushes the second connecting end 22 of the interlocking skeleton 2, causing the entire interlocking skeleton 2 to move forward. During this process, the second connecting end 22 of the interlocking skeleton 2 rises, and the first connecting end 21 of the interlocking skeleton 2 (corresponding to the front of the seat cushion 100) rotates the first transmission member 9 forward (for example, clockwise), causing the connection point between the first transmission member 9 and the first connecting end 21 of the interlocking skeleton 2 to gradually rise, thereby relatively raising the position of the first connecting end 21 of the interlocking skeleton 2, and the connection point between the first transmission member 9 and the first connecting end 21 of the interlocking skeleton 2 immediately descends after passing its highest point, causing the position of the first connecting end 21 of the interlocking skeleton 2 to lower. That is, in the process of the user transitioning from a position leaning back / lying backward to a position sitting upright, the position of the rear part of the seat cushion 100 rises, while the position of the front part of the seat cushion 100 rises first and then falls. As the position of the front part of the seat cushion 100 rises, the difference in level between the front part of the seat cushion 100 and the rear part of the seat cushion 100 becomes smaller, and the entire seat cushion 100 transitions to a nearly horizontal state.

[0082] 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. A chair, With the base, an interlocking framework movably connected to the base and fixedly connected to a seat cushion of the chair; a backrest frame pivotally connected to the base and power-transmittingly connected to the interlocking framework, for mounting the backrest of the chair; The chair is characterized in that, when the backrest frame rotates relative to the base, the interlocking framework and the seat cushion move relative to the base.

2. The interlocking backbone is a first connecting end movably connected to the base; 2. The chair according to claim 1, further comprising: a second connecting end that is power-transmittingly connected to the backrest frame.

3. 3. The chair of claim 2, wherein the first connecting end is slidably connected to the base.

4. The chair according to claim 3, wherein a first guide groove is provided on one of the first connecting end and the base, and a first sliding member that can slide within the first guide groove is provided on the other, so that the interlocking skeleton and the seat cushion move relative to the base.

5. the first guide groove includes a first segment and a second segment connected to each other; The first segment is disposed obliquely upward toward the rear side of the chair, 5. The chair according to claim 4, wherein the second segment is disposed obliquely upward toward the front of the chair.

6. 6. The chair of claim 5, wherein the angle of inclination of the first segment relative to a plane perpendicular to the base is greater than the angle of inclination of the second segment relative to a plane perpendicular to the base.

7. 6. The chair of claim 5, wherein at least one of the end of the first segment farther from the second segment and the end of the second segment farther from the first segment is positioned in an opening.

8. a second guide groove is provided in one of the first connecting end and the base, and a second sliding member is provided in the other; 4. The chair according to claim 3, wherein the second guide groove extends in the front-to-rear direction of the base, and the second sliding member is slidable within the second guide groove, thereby allowing the interlocking framework and the seat cushion to move in the front-to-rear direction relative to the base.

9. a first transmission member having one end connected to the base and the other end connected to the first connecting end; The chair according to claim 2, wherein at least one of the first connecting end and the base is rotatably connected to the first transmission member.

10. The chair according to claim 9, wherein the first transmission member is provided inclined toward the front of the chair along the front-rear direction of the chair.

11. 3. The chair of claim 2, wherein the back frame is slidably connected to the second connecting end.

12. a third guide groove is provided on one of the second connecting end and the backrest frame, and the third sliding member is provided on the other; The chair of claim 11, wherein the third sliding member is slidable in the third guide groove, thereby moving the interlocking framework and the seat cushion relative to the base.

13. 13. The chair of claim 12, wherein the third guide groove extends along the longitudinal direction of the base so that the interlocking framework allows the seat cushion to move longitudinally relative to the base.

14. A chair as claimed in any one of claims 11 to 13, characterized in that a stop structure for limiting the rotation angle of the interlocking skeleton relative to the base is installed on the side of the base facing the interlocking skeleton.

15. The chair described in any one of claims 2 to 10, further comprising a second transmission member having one end transmission-connected to the backrest frame and the other end rotatably connected to the base, wherein the second transmission member is used to rotatably connect the second connecting end.

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