Seat

Abstract

The utility model discloses a seat which comprises a base, a linkage framework and a backrest support, the linkage framework is movably connected with the base, and the linkage framework is fixedly connected with a seat cushion of the seat; the backrest support is rotationally connected with the base, the backrest support is further connected with the linkage framework, and the backrest support is used for installing a backrest of a seat; when the backrest support rotates relative to the base, the backrest support drives the linkage framework and the seat cushion to move relative to the base. According to the seat disclosed by the utility model, when the backrest bracket rotates relative to the base, the backrest bracket drives the linkage framework to move, so that the linkage framework drives the seat cushion to synchronously move relative to the base. Through the connection between the linkage framework and the base and / or the connection between the linkage framework and the backrest support, the seat cushion can be controlled to move when the backrest drives the seat cushion to move, the seat cushion adaptively supports the buttocks of a user along with the rotation angle change of the backrest support, and the use comfort of the seat can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a seat. Background Art

[0002] Chairs are commonly seen in offices, study rooms and other places, and they can meet people's needs for sitting to work, study or rest.

[0003] A seat usually includes a base, a seat cushion, and a backrest, and usually has an adjustment function. For example, the backrest of the seat is set so that when the user leans on the backrest, the backrest can rotate relative to the base, allowing the user to change the sitting posture according to needs when using the seat to reduce fatigue from sitting for a long time.

[0004] In related art, a backrest is connected to a seat cushion. When a user leans back against the backrest, causing the backrest to rotate backward relative to the base, the front portion of the seat cushion tilts up with the backrest's rotation to support the user's buttocks. However, this seat has the following problem: as the backrest rotates, the front portion of the seat cushion tilts up with the rotation of the backrest, resulting in an excessively large tilt angle. This can easily cause pressure on the user's thighs, thus affecting seat comfort. Utility Model Content

[0005] The main purpose of the present invention is to provide a chair to improve the user's comfort.

[0006] To achieve the above-mentioned purpose, the present invention provides a chair, comprising:

[0007] base;

[0008] A linkage frame, movably connected to the base, and the linkage frame is fixedly connected to the seat cushion;

[0009] A backrest bracket is rotatably connected to the base and is also transmission-connected to the linkage frame. The backrest bracket is used to mount the backrest of the seat;

[0010] When the backrest bracket rotates relative to the base, the backrest bracket drives the linkage frame and the seat cushion to move relative to the base.

[0011] In some embodiments, the linkage skeleton comprises:

[0012] A first connecting end, movably connected to the base;

[0013] The second connecting end is transmission-connected to the backrest bracket.

[0014] In some embodiments, the first connecting end is slidably connected to the base.

[0015] In some embodiments, one of the first connecting end and the base is provided with a first guide groove, and the other one is provided with a first sliding member, and the first sliding member can slide in the first guide groove, so that the linkage frame and the seat cushion move relative to the base.

[0016] In some embodiments, the first guide groove includes a first groove section and a second groove section connected to each other, the first groove section is arranged obliquely upward toward the rear side of the seat, and the second groove section is arranged obliquely upward toward the front side of the seat.

[0017] In some embodiments, an inclination angle of the first slot segment relative to a vertical plane of the base is greater than an inclination angle of the second slot segment relative to the vertical plane of the base.

[0018] In some embodiments, at least one of an end of the first trough section away from the second trough section and an end of the second trough section away from the first trough section is open.

[0019] In some embodiments, one of the first connecting end and the base is provided with a second guide groove, and the other one is provided with a second sliding member, the second guide groove extends along the front-to-back direction of the base, and the second sliding member can slide in the second guide groove, so that the linkage frame and the seat cushion move forward and backward relative to the base.

[0020] In some embodiments, the seat further comprises a first transmission member, one end of the first transmission member is connected to the base, and the other end of the first transmission member is connected to the first connection end, wherein:

[0021] At least one of the first connecting end and the base is rotatably connected to the first transmission member.

[0022] In some embodiments, the first transmission member is tilted toward the front side of the seat along the front-to-rear direction of the seat.

[0023] In some embodiments, the backrest bracket is slidably connected to the second connection end.

[0024] In some embodiments, one of the second connecting end and the backrest bracket is provided with a third guide groove, and the other is provided with a third sliding member adapted to the third guide groove. The third sliding member can slide in the third guide groove, so that the linkage skeleton drives the seat cushion to move relative to the base.

[0025] In some embodiments, the third guide groove extends along the longitudinal direction of the base, so that the linkage skeleton drives the seat cushion to move longitudinally relative to the base.

[0026] In some embodiments, a stop structure is constructed on a side of the base facing the linkage frame, and the stop structure is used to limit the rotation angle of the linkage frame relative to the base.

[0027] In some embodiments, the seat further includes a second transmission member, one end of which is transmission-connected to the backrest bracket and the other end of which is rotationally connected to the base, and the second transmission member is used to rotationally connect to the second connection end.

[0028] The backrest and seat cushion of the chair of this utility model form a linkage structure through a linkage frame and a backrest bracket. When the backrest bracket rotates relative to the base, the backrest bracket drives the linkage frame to move, so that the linkage frame drives the seat cushion to move synchronously with the base. By connecting the linkage frame to the base and / or the linkage frame to the backrest bracket, the movement of the seat cushion can be controlled when the backrest drives the seat cushion to move. The seat cushion adaptively supports the user's buttocks as the rotation angle of the backrest bracket changes, effectively improving the comfort of the chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a seat in one embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of a seat in another embodiment of the present invention;

[0031] Figure 3 This is a structural diagram of part of the structure of a seat in one embodiment of the present invention;

[0032] Figure 4 This is a structural diagram of the first guide groove and the first guide member in one embodiment of the present utility model;

[0033] Figure 5 This is a structural diagram of a seat in another embodiment of the present invention;

[0034] Figure 6 This is a structural diagram of a seat in yet another embodiment of the present invention.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0039] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0040] See Figures 1 to 3 The present invention provides a chair, comprising:

[0041] Base 1;

[0042] A linkage frame 2 is movably connected to the base 1 and is fixedly connected to the seat cushion 100;

[0043] A backrest bracket 3 is rotatably connected to the base 1 and is also transmission-connected to the linkage frame 2. The backrest bracket 3 is used to mount the backrest 200 of the seat;

[0044] When the backrest bracket 3 rotates relative to the base 1 , the backrest bracket 3 drives the linkage frame 2 and the seat cushion 100 to move relative to the base 1 .

[0045] In this embodiment, the seat cushion 100 is used to provide support for the buttocks and thighs. Figure 1 and Figure 3 The seat cushion 100 is usually provided on the base 1 and is located on the upper side of the base 1. When a user uses the seat, 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 accordingly.

[0046] Among them, the seat cushion 100 can be arranged in linkage with the backrest 200 through the backrest bracket 3, and there is a mutually coordinated action mechanism between the three. For example, when the backrest 200 is subjected to an external force toward the rear side of the seat, the backrest bracket 3 rotates toward the rear side of the seat to correspondingly drive the seat cushion 100 to move backward. The external force that makes the backrest 200 move toward the rear side of the seat can be pressure applied to the backrest 200 by the user, or it can be a driving force applied by a driving element such as a motor or cylinder provided on the seat. When the user leans back / lies back, a backward pressure is applied to the backrest 200, and the backrest 200 can rotate backward with the backrest bracket 3 and the seat cushion 100 moves backward at the same time to automatically adjust its position to adapt to the user's sitting posture.

[0047] When the backrest 200 or the backrest bracket 3 is subjected to a forward external force, the external force causes the backrest 200 to rotate the backrest bracket 3 toward the front of the seat, or the external force directly acts on the backrest bracket 3 to rotate the backrest bracket 3 toward the front of the seat, thereby causing the backrest bracket 3 to correspondingly move the seat cushion 100 forward. For example, when the user moves from reclining / lying back to sitting upright, the backrest 200 rotates forward with the backrest bracket 3, and the backrest bracket 3 simultaneously drives the seat cushion 100 forward, automatically adjusting its position to suit the user's sitting posture.

[0048] Furthermore, in this embodiment, a linkage frame 2 is also provided, which is used to be movably connected to the base 1 of the seat and on which the seat cushion 100 can be installed. The linkage frame 2 is transmission-connected to the backrest bracket 3 and can move with the backrest bracket 3 when the backrest bracket 3 rotates, and drive the seat cushion 100 fixedly connected to the linkage frame 2 to move.

[0049] The linkage frame 2 is movably connected to the base 1. The movably connected connection may include a rotational connection, a sliding connection, or a connection via a connecting rod structure. Due to the movably connected connection between the linkage frame 2 and the base 1, the linkage frame 2 can move relative to the base 1 on the base 1. The movement may include movement, rotation, etc.

[0050] The seat cushion 100 is mounted on the linkage frame 2. The linkage frame 2 can form a support for the seat cushion 100, and the seat cushion 100 is arranged to move with the linkage frame 2. That is, the seat cushion 100 forms a transmission connection with the backrest bracket 3 through the linkage frame 2, and a corresponding linkage relationship is formed between the backrest 200 and the seat cushion 100. The linkage frame 2 can be arranged between the base 1 and the seat cushion 100, with the seat cushion 100 located above the linkage frame 2 and connected to the linkage frame 2, or the linkage frame 2 can be arranged at the bottom of the seat cushion 100, with the seat cushion 100 being mounted on the linkage frame 2, or the linkage frame 2 can be part of the support structure of the seat cushion 100, with the support structure of the seat cushion 100 and the linkage frame 2 being arranged as one. Among them, according to the multiple different functions and settings of the linkage frame 2, the linkage frame 2 can also be called a seat cushion frame, a chassis frame, a base frame, etc.

[0051] The shape of the linkage frame 2 can be roughly frame-shaped, which is adapted to the outer contour of the seat cushion 100. The linkage frame 2 can be an integrally formed frame or a frame assembled from multiple different components or parts, which is not limited.

[0052] The linkage frame 2 and the backrest bracket 3 are connected by transmission, such as Figure 3 As shown, the linkage skeleton 2 and the backrest bracket 3 can be directly connected to form a transmission relationship between the two; or, the backrest bracket 3 can be connected to an intermediate connecting piece, and the linkage skeleton 2 is connected to the intermediate connecting piece to achieve connection with the backrest bracket 3, thereby forming a transmission relationship between the two. The transmission connection between the linkage skeleton 2 and the backrest bracket 3 can be a rotational connection, a sliding connection, or a hinged connection. Since the backrest bracket 3 is transmission-connected to the linkage skeleton 2, when the backrest bracket 3 is rotated by an external force, the backrest bracket 3 can drive the linkage skeleton 2 to move, thereby achieving transmission of the linkage skeleton 2, and then the linkage skeleton 2 drives the seat cushion 100 to move in a linkage manner. Among them, the movement of the seat cushion 100 can be moving forward and backward relative to the base 1 to achieve position adjustment of the seat cushion 100. Or, further, during the position adjustment process of the seat cushion 100, the seat cushion 100 can also rotate relative to the base 1 to achieve angle adjustment of the seat cushion 100.

[0053] By setting up a seat with the above structure, the present application can achieve that when the backrest 200 is subjected to external force, the backrest bracket 3 can rotate relative to the base 1 along the front and rear direction of the seat under the action of the external force, so as to correspondingly drive the linkage frame 2 to move forward or backward, so that the seat cushion 100 connected to the linkage frame 2 moves forward or backward, so as to automatically adjust the position of the seat cushion 100 to adapt to the user's sitting posture.

[0054] See Figure 3In some embodiments, the linkage skeleton 2 proposed in the embodiment of the present utility model includes a first connecting end 21 and a second connecting end 22, the first connecting end 21 is movably connected to the base 1; the second connecting end 22 is transmission-connected to the backrest bracket 3.

[0055] In this embodiment, the first connecting end 21 and the second connecting end 22 can be the front and rear ends of the linkage frame 2 that are relatively spaced apart and arranged along the front-to-back direction of the seat or along the front-to-back direction of the base 1;

[0056] Among them, it can be: the first connection end 21 of the linkage skeleton 2 is movably connected to the base 1, and the second connection end 22 of the linkage skeleton 2 is transmission-connected to the backrest bracket 3, so that the linkage skeleton 2 can move relative to the base 1 along the front and rear direction of the base 1 under the drive of the backrest bracket 3.

[0057] Because the backrest bracket 3 and the base 1 are pivotally connected, by movably connecting the first connecting end 21 of the linkage frame 2 to the base 1 and by transmission-connecting the second connecting end 22 of the linkage frame 2 to the backrest bracket 3, a linkage mechanism is formed among the backrest bracket 3, the base 1, and the linkage frame 2, and a relatively defined kinematic relationship is established. Therefore, due to the existence of this linkage mechanism, the linkage frame 2 has a defined motion trajectory and corresponding motion motion. In other words, when the backrest bracket 3 rotates, it correspondingly drives the linkage frame 2 to move along the defined motion trajectory and perform the corresponding motion motion.

[0058] For example, when a user is using the chair, they sit on the seat cushion 100. When the user leans back / lies down and the backrest bracket 3 rotates backward (e.g., counterclockwise), the backrest bracket 3 drives the linkage frame 2, which drives the seat cushion 100 to move backward and rotate in a first direction. As the user leans back / lies down, the position and angle of the seat cushion 100 are adjusted accordingly, allowing the seat cushion 100 to adapt to the position of the user's buttocks. Furthermore, when the user moves from leaning back / lying down to sitting upright and the backrest bracket 3 rotates forward (e.g., clockwise), the backrest bracket 3 drives the linkage frame 2, which drives the seat cushion 100 to move forward and rotate in a second direction (opposite to the first direction). As the user moves from leaning back / lying down to sitting upright, the position and angle of the seat cushion 100 are adjusted accordingly, allowing the seat cushion 100 to adapt to the position of the user's buttocks.

[0059] Among them, the movable connection between the first connection end 21 of the linkage skeleton 2 and the base 1 can be movably connected through a single connection point. For example, the first connection end 21 of the linkage skeleton 2 is provided with a single connection part, and the base 1 is connected to the single connection part to achieve a single-point connection with the linkage skeleton 2. Optionally, the single connection part can be located at the midline position of the linkage skeleton 2, that is, the connection point is set at the midline position of the linkage skeleton 2. Alternatively, the movable connection between the first connection end 21 of the linkage skeleton 2 and the base 1 can also be a multi-point connection, that is, the first connection end 21 of the linkage skeleton 2 is connected to the base 1 through multiple connection points. For example, the first connection end 21 of the linkage skeleton 2 is provided with multiple connection parts, and the base 1 is respectively connected to the multiple connection parts to achieve a multi-point connection with the first connection end 21 of the linkage skeleton 2. The number of connection parts is set according to the number of connection points. Optionally, two connecting portions may be provided, symmetrically arranged about the center of the linkage frame 2 in the transverse direction, such as being provided on opposite sides of the linkage frame 2 along its width, i.e., the two connection points are provided on opposite sides of the linkage frame 2 along its width. When the first connecting end 21 of the linkage frame 2 is connected to the base 1 at multiple points, the connection form and connection structure of each connection point are arranged to be the same, so that the movement of the linkage frame 2 is precise and stable.

[0060] In addition, the second connecting end 22 of the linkage frame 2 is transmission-connected to the backrest bracket 3, as shown in FIG. Figure 3 As shown, the second connecting end 22 of the linkage skeleton 2 can be directly connected to the backrest bracket 3 to form a transmission relationship between the two; or, the backrest bracket 3 can be connected to an intermediate connecting member as described in the above embodiment, and the second connecting end 22 of the linkage skeleton 2 is connected to the intermediate connecting member to achieve connection with the backrest bracket 3, thereby forming a transmission relationship between the two.

[0061] Optional, such as Figure 2 As shown, a second transmission member 6 can be provided as an intermediate connection member to achieve a transmission connection between the second connection end 22 of the linkage frame 2 and the backrest bracket 3. One end of the second transmission member 6 is transmission-connected to the backrest bracket 3, and the other end is rotationally connected to the base 1. The second transmission member 6 is used to rotationally connect the second connection end 22. Whether the linkage frame 2 is directly connected to the backrest bracket 3 or connected to the backrest bracket 3 through the second transmission member 6, the connection method adopted can be a transmission connection.

[0062] Furthermore, the transmission connection between the second transmission member 6 and the backrest bracket 3 can be achieved by directly connecting one end of the second transmission member 6 to the backrest bracket 3 to establish a transmission relationship between the two. Alternatively, the second transmission member 6 can be connected to the backrest bracket 3 through another intermediate connector, with one end of the intermediate connector connected to the backrest 200 and the other end connected to the backrest bracket 3. The second transmission member 6 is connected to the intermediate connector to achieve a transmission connection with the backrest bracket 3. The intermediate connector can be a connecting rod or a drive motor.

[0063] The connection between the second connecting end 22 of the linkage frame 2 and the second transmission member 6 or the backrest bracket 3 can be a single-point connection or a multi-point connection. The connection setting principle is similar to the connection setting principle between the first connecting end 21 of the linkage frame 2 and the base 1 mentioned above, and can be referenced accordingly, and will not be repeated here. Correspondingly, when the second connecting end 22 of the linkage frame 2 is connected to the intermediate connector or the backrest bracket 3 at multiple points, the connection form and connection structure of each connection point are configured to be the same, so that the movement of the linkage frame 2 is precise and smooth.

[0064] Please continue to see Figure 3 As one of the preferred solutions for movably connecting the first connection end 21 to the base 1 , the first connection end 21 proposed in the embodiment of the present utility model is slidably connected to the base 1 .

[0065] In this embodiment, the second connection end 22 of the linkage frame 2 can be hinged to the backrest bracket 3; optionally, the second connection end 22 of the linkage frame 2 is provided with a hinge structure, and the linkage frame 2 is hinged to the backrest bracket 3 through the hinge structure;

[0066] Please continue to see Figure 3 , the second connection end 22 of the linkage skeleton 2 is hingedly connected to the backrest bracket 3 through the provided hinge structure to achieve a transmission connection. As an example, the hinge structure of the linkage skeleton 2 and the backrest bracket 3 can be connected through a hinge shaft, so that a hinge is formed between the second connection end 22 of the linkage skeleton 2 and the backrest bracket 3. Among them, two hinge structures can be provided, and the two hinge structures are relatively arranged on both sides of the linkage skeleton 2 along its width direction. Both hinge structures are docked with the backrest bracket 3 and are respectively connected by hinge shafts. When the backrest bracket 3 rotates, the second connection end 22 of the linkage skeleton 2 can be driven to move accordingly. Since the second connection end 22 of the linkage skeleton 2 and the backrest bracket 3 are hinged, the second connection end 22 of the linkage skeleton 2 can rotate relative to the backrest bracket 3 during the movement. The movements of the linkage skeleton 2 and the backrest bracket 3 adapt to each other, which can avoid linkage jamming.

[0067] The first connection end 21 of the linkage frame 2 is slidably connected to the base 1 of the seat, so that the linkage frame 2 can be movably arranged on the base 1 of the seat. The first connection end 21 of the linkage frame 2 and the base 1 of the seat can be slidably connected by a sliding structure with a groove shaft.

[0068] Specifically, as one of the preferred embodiments of the first connection end 21 being slidably connected to the base 1, see Figure 2 and Figure 3 , one of the first connecting end 21 and the base 1 proposed in the embodiment of the present invention is provided with a first guide groove 4, and the other one is provided with a first sliding member 5, and the first sliding member 5 can slide in the first guide groove 4, so that the linkage frame 2 and the seat cushion 100 move relative to the base 1.

[0069] Taking the example of a first connecting end 21 provided with a first guide groove 4 and a base 1 provided with a first sliding member 5, a first sliding member 5 is inserted into the first guide groove 4 and slidably engaged therewith. The first guide groove 4 extends along the front-to-back direction of the seat, and the first sliding member 5 is used to connect to the base 1 of the seat. Optionally, an intermediate connecting member with the first guide groove 4 can be provided, and the first guide groove 4 on the intermediate connecting member is slidably connected to the first sliding member 5 to achieve a corresponding sliding connection between the first connecting end 21 and the base 1. The intermediate connecting member can be connected to the first connecting end 21 in a separate manner. When the linkage frame 2 is driven by the backrest bracket 3 to move, the movement of the linkage frame 2 causes the first guide groove 4 to slide relative to the first sliding member 5, and the first sliding member 5 remains stationary relative to the base 1.

[0070] When the user sits on the seat cushion 100 and leans back / lies back or turns from leaning back / lying back to sitting upright, the backrest bracket 3 rotates on the base 1 relative to the base 1. During the rotation, the backrest bracket 3 drives the second connecting end 22 of the linkage frame 2 to move accordingly, and the first guide groove 4 on the first connecting end 21 slides relative to the first sliding member 5 to make the front end of the linkage frame 2 move, so that the linkage frame 2 moves relative to the base 1 along the front and rear direction of the seat, thereby driving the seat cushion 100 to move, thereby adjusting the position or angle of the seat cushion 100 at different backrest 200 angles.

[0071] The first guide slot 4 extends along the front-to-back direction of the seat, and the first sliding member 5 is inserted into the first guide slot 4 and is confined to slide within the first guide slot 4, so that the first connecting end 21 of the linkage frame 2 has a defined motion trajectory in the front-to-back direction of the seat. When the linkage frame 2 moves, the first guide slot 4 provided on the linkage frame 2 slides relative to the first sliding member 5, causing the first connecting end 21 of the linkage frame 2 to move along the defined motion trajectory, thereby enabling the seat cushion 100 to perform the corresponding motion. In other words, by designing the shape of the first guide slot 4, a specific motion trajectory can be set for the linkage frame 2, thereby enabling the seat cushion 100 to have a specific motion.

[0072] Specifically, refer to Figure 4 In some embodiments, the first guide groove 4 includes a first groove section 41 and a second groove section 42 connected to each other, the first groove section 41 is arranged to be inclined upward toward the rear side of the seat, and the second groove section 42 is arranged to be inclined upward toward the front side of the seat.

[0073] In this embodiment, the first guide groove 4 includes a first groove section 41 and a second groove section 42 connected to each other. The first groove section 41 and the second groove section 42 are respectively inclined and tilted in opposite directions. In the fore-aft direction of the seat, the first groove section 41 tilts toward the front and upper portion, while the second groove section 42 tilts toward the rear and upper portion. 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 between the first groove section 41 and the second groove section 42. That is, the groove body of the first guide groove 4 is generally V-shaped, and the sliding path of the first sliding member 5 relative to the first guide groove 4 is correspondingly approximately V-shaped.

[0074] Optionally, a smooth transition section is preferably provided at the transition position where the first groove section 41 and the second groove section 42 meet, so that the first sliding member 5 can smoothly transition when transferring between the two groove sections, thereby avoiding a sense of stagnation caused by a rapid change in the angle of the transition section when the first sliding member 5 transfers between the two groove sections.

[0075] When the user leans back / lies back, the backrest bracket 3 rotates backward (such as counterclockwise) and correspondingly pulls the second connection end 22 of the linkage frame 2 to drive the linkage frame 2 to move backward as a whole. During this process, the second connection end 22 of the linkage frame 2 is lowered. At the first connection end 21 of the linkage frame 2 (corresponding to the front part of the seat cushion 100), the first guide groove 4 is stationary and the first sliding member 5 moves relative to the first guide groove 4 (in fact, the first guide groove 4 can move while the first sliding member 5 is stationary. This is just for describing the movement process and it is assumed that the first guide groove 4 is stationary). The first sliding member 5 slides relative to the first groove section 41 of the first guide groove 4, so that the position of the first connection end 21 of the linkage frame 2 is raised, and the angle of the seat cushion 100 changes and gradually tilts backward (tilted backward). Then the first sliding member 5 slides from the first groove section 41 to the second groove section 42 and continues to slide along the second groove section 42, so that the position of the first connection end 21 of the linkage frame 2 is lowered, so that the backward tilt angle of the seat cushion 100 gradually becomes smaller. That is, when the user leans back / lies back, the position of the rear portion of the seat cushion 100 is lowered, while the position of the front portion of the seat cushion 100 is first raised and then lowered. During the process of the front portion of the seat cushion 100 being lowered, the height difference between the front portion of the seat cushion 100 and the rear portion of the seat cushion 100 becomes smaller, and the seat cushion 100 as a whole is transformed toward a nearly horizontal state, thereby making the seat cushion 100 have a smaller rearward tilt angle, preventing the seat cushion 100 from tilting back excessively and causing the buttocks to poke forward. When the user lies down to rest on the seat, he or she can lie as flat as possible, which helps to improve the user's comfort when using the seat.

[0076] When the user shifts from reclining / lying back to sitting upright, the backrest bracket 3 rotates forward (e.g., clockwise) and pushes the second connection end 22 of the linkage frame 2, thereby driving the entire linkage frame 2 forward. During this process, the second connection end 22 of the linkage frame 2 rises. At the first connection end 21 of the linkage frame 2 (corresponding to the front portion of the seat cushion 100), the first slider 5 begins to slide relative to the first guide slot 4. The first slider 5 first slides along the second slot section 42, lowering the first connection end 21 of the linkage frame 2. The first slider 5 then slides from the second slot section 42 to the first slot section 41 and continues to slide along the first slot section 41, raising the first connection end 21 of the linkage frame 2. In other words, when the user shifts from reclining / lying back to sitting upright, the rear portion of the seat cushion 100 rises, while the front portion of the seat cushion 100 first lowers and then rises. As the front portion of the seat cushion 100 rises, the height difference between the front and rear portions of the seat cushion 100 decreases, causing the entire seat cushion 100 to transition toward a horizontal position.

[0077] like Figure 4 As shown in the embodiment described above, as one of the preferred arrangements of the first slot section 41 and the second slot section 42, please continue to refer to Figure 6The inclination angle of the first slot section 41 proposed in the embodiment of the present invention relative to the vertical plane 1A of the base 1 is greater than the inclination angle of the second slot section 42 relative to the vertical plane 1A of the base 1 .

[0078] In the first guide groove 4, relative to the vertical surface 1A of the base 1, the inclination angle of the first groove section 41 of the first guide groove 4 is different from the inclination angle of the second groove section 42 (or, it can also be defined as the inclination of the first groove section 41 is different from the inclination or slope of the second groove section 42). Optionally, the inclination angle of the first groove section 41 is greater than the inclination angle of the second groove section 42, that is, Figure 4 As shown, a first angle 4B between the first slot section 41 and the vertical surface 1A of the base 1 is greater than a second angle 4A between the second slot section 42 and the vertical surface 1B of the base 1 .

[0079] When the user leans back / lies down, at the front end of the linkage skeleton 2 (corresponding to the front part of the seat cushion 100), the first connecting end 21 moves to make the first sliding member 5 slide relative to the first slot section 41 along the first slot section 41. Since the inclination angle of the first slot section 41 is relatively large, the speed at which the angle of the seat cushion 100 changes is relatively fast. During this process, the front part of the seat cushion 100 rises quickly, which can prevent the seat cushion 100 from poking the human body when the user leans back, causing the human body to slide forward, thereby preventing the buttocks from sliding out of the seat cushion 100; then the first sliding member 5 slides relative to the first slot section 41 to the second slot section 42 and then continues to slide relative to the second slot section 42. Since the inclination angle of the second slot section 42 is relatively small, the speed at which the angle of the seat cushion 100 changes is relatively slow. During this process, the position of the human body on the seat cushion 100 is basically stable, and the front part of the seat cushion 100 falls slowly, which can reduce possible discomfort.

[0080] The groove body shape of the first guide groove 4 can be set to other shapes besides the above-mentioned V-shaped groove. For example, the groove body shape of the first guide groove 4 can be an arc-shaped groove.

[0081] Optionally, at least one of the two opposite ends of the first guide groove 4 is open. Figure 4 As shown, along the front-to-back 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 is used to allow the first sliding member 5 to enter or exit the first guide groove 4, thereby realizing modular assembly and disassembly of the seat cushion 100 and the linkage frame 2 on the base 1. When installing the base 1, the first sliding member 5 is inserted into the first guide groove 4 through the opening 43, so that the front end of the linkage frame 2 forms a sliding connection with the base 1, thereby realizing the installation of the base 1. When disassembling the base 1, the first sliding member 5 is correspondingly removed from the first guide groove 4 through the opening 43 to cancel the sliding connection between the linkage frame 2 and the base 1, thereby realizing the disassembly of the base 1.

[0082] See Figure 5 As another preferred embodiment in which the first connecting end 21 is slidably connected to the base 1, in some embodiments, one of the first connecting end 21 and the base 1 is provided with a second guide groove 7, and the other one is provided with a second sliding member 8. The second guide groove 7 extends along the front and rear direction of the base 1, and the second sliding member 8 can slide in the second guide groove 7, so that the linkage frame 2 and the seat cushion 100 move forward and backward relative to the base 1.

[0083] In this embodiment, a second guide groove 7 is provided on one of the first connecting end 21 of the linkage skeleton 2 and the base 1, and a second sliding member 8 adapted to the second guide groove 7 is provided on the other. The second guide groove 7 extends along the front and rear directions of the seat. The second sliding member 8 is inserted into the second guide groove 7 and slides with the second guide groove 7. The first connecting end 21 of the linkage skeleton 2 and the base 1 are slidably connected through the sliding cooperation between the second sliding member 8 and the second guide groove 7.

[0084] The first connecting end 21 of the linkage frame 2 may be provided with a second guide groove 7, and the base 1 may be provided with a second sliding member 8. The second sliding member 8 on the base 1 may be inserted into the second guide groove 7 of the first connecting end 21 of the linkage frame 2 for sliding engagement. Optionally, the second guide groove 7 is a linear groove. In addition to the sliding connection, the first connecting end 21 of the linkage frame 2 and the base 1 may also be connected via a connecting rod structure. It is understandable that the first connecting end 21 of the linkage frame 2 may also be provided with a second sliding member 8, and the base 1 may be provided with a second guide groove 7.

[0085] like Figure 4 As shown, as one of the embodiments of the backrest bracket 3 slidingly linked to the second connecting end 22, preferably, one of the second connecting end 22 and the backrest bracket 3 is provided with a third guide groove 12, and the other one is provided with a third sliding member 13, and the third sliding member 13 can slide in the third guide groove 12, so that the linkage skeleton 2 drives the seat cushion 100 to move relative to the base 1.

[0086] The third guide groove 12 extends along the longitudinal direction of the base 1 , so that the linkage skeleton 2 drives the seat cushion 100 to move longitudinally relative to the base 1 .

[0087] A third guide groove 12 is provided on the second connecting end 22 of the linkage skeleton 2 and one of the backrest bracket 3, and a third sliding member 13 adapted to the third guide groove 12 is provided on the other. The third guide groove 12 extends along the longitudinal direction of the seat. The third sliding member 13 is inserted into the third guide groove 12 and slides with the third guide groove 12. The second connecting end 22 of the linkage skeleton 2 and the backrest bracket 3 are slidably connected through the sliding cooperation between the third sliding member 13 and the third guide groove 12.

[0088] The second connecting end 22 of the linkage frame 2 may be provided with a third guide groove 12, and the backrest bracket 3 may be provided with a third sliding member 13. The third sliding member 13 on the backrest bracket 3 may be inserted into the third guide groove 12 of the second connecting end 22 of the linkage frame 2 for sliding engagement. Optionally, the third guide groove 12 is a linear groove.

[0089] When the user sits on the seat cushion 100 and leans back / lies back or turns from leaning back / lying back to sitting upright, the backrest bracket 3 rotates on the base 1 relative to the base 1. During the rotation process, the backrest bracket 3 is supported by the third sliding member 13 against the groove wall of the third guide groove 12 to correspondingly drive the second connecting end 22 of the linkage frame 2 to move, and the second sliding member 8 slides along the second guide groove 7 to move the first connecting end 21 of the linkage frame 2, so that the linkage frame 2 moves relative to the base 1 along the front and rear direction of the base 1, thereby driving the seat cushion 100 to move, thereby adjusting the position and angle of the seat cushion 100 at different backrest 200 angles.

[0090] Optionally, refer to Figure 5 The base 1 is provided with a retaining structure 1B on the side facing the linkage frame 2. The retaining structure 1B is used to limit the movable angle of the linkage frame 2 by retaining the linkage frame 2. The retaining structure 1B can be integrally formed with the base 1, such as protruding from the base 1 toward the linkage frame 2; or the retaining structure 1B can be connected to the base 1, such as including a retaining member that is detachably provided on the base 1.

[0091] When the user leans back / lies back, the backrest bracket 3 rotates backward (such as counterclockwise). During the rotation process, the backrest bracket 3 is supported by the third sliding member 13 against the groove wall of the third guide groove 12 to correspondingly pull the second connection end 22 of the linkage frame 2, thereby driving the linkage frame 2 to move backward as a whole. During this process, the position of the second connection end 22 of the linkage frame 2 is lowered, and at the first connection end 21 of the linkage frame 2 (corresponding to the front part of the seat cushion 100), the second sliding member 8 slides along the second guide groove 7, so that the position of the first connection end 21 of the linkage frame 2 is relatively raised, and the angle of the seat cushion 100 changes and gradually tilts backward (i.e., tilts backward). The supporting structure 1B is located in the rearward tilting direction of the seat cushion 100. During the rearward tilting process of the seat cushion 100, when the linkage frame 2 contacts the supporting structure 1B, the supporting structure 1B forms a barrier to the linkage frame 2, thereby preventing the seat cushion 100 from continuing to tilt backward, and the rearward tilting angle of the seat cushion 100 no longer changes. The third sliding member 13 is supported by the groove wall of the third guide groove 12 and at the same time keeps pulling the second connection end 22 of the linkage frame 2. The second sliding member 8 continues to slide along the second guide groove 7, thereby driving the linkage frame 2 to move backward as a whole, that is, the seat cushion 100 keeps moving backward but the rearward tilting angle no longer changes, so that the seat cushion 100 has a smaller rearward tilting angle, preventing the seat cushion 100 from tilting backward excessively and causing the buttocks to poke forward. When the user lies down on the seat to rest, he can achieve the effect of lying as flat as possible, which helps to improve the comfort of the user when using the seat.

[0092] When the user turns from leaning back / lying back to sitting upright, the backrest bracket 3 rotates forward (such as clockwise). During the rotation process, the backrest bracket 3 is supported by the third sliding member 13 against the groove wall of the third guide groove 12 to correspondingly push the second connection end 22 of the linkage frame 2, thereby driving the linkage frame 2 to move forward as a whole. During this process, the position of the second connection end 22 of the linkage frame 2 is raised, and at the first connection end 21 of the linkage frame 2 (corresponding to the front part of the seat cushion 100), the second sliding member 8 slides along the second guide groove 7, and the position of the first connection end 21 of the linkage frame 2 is relatively lowered. The angle of the seat cushion 100 changes from a tilted state to a horizontal state, and the position of the seat cushion 100 also moves forward as a whole.

[0093] See Figure 6 As another preferred solution in which the first connecting end 21 is movably connected to the base 1, the seat proposed in the embodiment of the present invention further includes a first transmission member 9, one end of the first transmission member 9 is connected to the base 1, and the other end of the first transmission member 9 is connected to the first connecting end 21, wherein:

[0094] At least one of the first connecting end 21 and the base 1 is rotatably connected to the first transmission member 9 .

[0095] A first transmission member 9 is provided between the first connection end 21 of the linkage frame 2 and the base 1. The first transmission member 9 can be a single member, one end of which is fixedly connected to the linkage frame 2 and the other end of which is hinged to the base 1, or one end of which is fixedly connected to the linkage frame 2 and the other end of which is hinged to the base 1. Furthermore, the second connection end 22 of the linkage frame 2 can be hingedly connected to the backrest bracket 3 to achieve a movable connection. The hinged structure between the second connection end 22 of the linkage frame 2 and the backrest bracket 3 can be configured with reference to the aforementioned embodiment and will not be described in detail here. When the backrest bracket 3 rotates, the second connection end 22 of the linkage frame 2 can be driven to move accordingly. Since the second connection end 22 of the linkage frame 2 and the backrest bracket 3 are hingedly connected, the second connection end 22 of the linkage frame 2 can rotate relative to the backrest bracket 3 during movement. The movements of the linkage frame 2 and the backrest bracket 3 adapt to each other, thus preventing the linkage from becoming stuck.

[0096] When the user sits on the seat cushion 100 and leans back / lies back or turns from leaning back / lying back to sitting upright, the backrest bracket 3 rotates on the base 1 relative to the base 1. During the rotation, the backrest bracket 3 drives the second connecting end 22 of the linkage frame 2 to move accordingly, and the first transmission member 9 rotates to support the first connecting end 21 of the linkage frame 2 to move, so that the linkage frame 2 moves relative to the base 1 along the front-to-back direction of the base 1, thereby driving the seat cushion 100 to move, thereby adjusting the position and / or angle of the seat cushion 100 at different backrest 200 angles.

[0097] Optionally, in the initial state, the first transmission member 9 is tilted forward along the front-to-back direction of the seat, and the connection point between the first transmission member 9 and the first connection end 21 of the linkage frame 2 is located in front of the connection point between the first transmission member 9 and the base 1. The tilt angle of the first transmission member 9 can be set to 10° to 30°. Preferably, as Figure 6 As shown, the inclination angle of the first transmission member 9 is 20°.

[0098] When the user leans back / lies back, the backrest bracket 3 rotates backward (such as counterclockwise) and correspondingly pulls the second connection end 22 of the linkage frame 2 to drive the linkage frame 2 to move backward as a whole. During this process, the position of the second connection end 22 of the linkage frame 2 is lowered. At the first connection end 21 of the linkage frame 2 (corresponding to the front part of the seat cushion 100), the first transmission member 9 rotates backward (such as counterclockwise). The connection point between the first transmission member 9 and the first connection end 21 of the linkage frame 2 gradually rises, so that the position of the first connection end 21 of the linkage frame 2 is raised, and the angle of the seat cushion 100 changes and gradually tilts backward (tilted backward). The connection point between the first transmission member 9 and the first connection end 21 of the linkage frame 2 drops immediately after passing the highest point, so that the position of the first connection end 21 of the linkage frame 2 is lowered, so that the backward tilt angle of the seat cushion 100 gradually becomes smaller. That is, when the user leans back / lies back, the position of the rear portion of the seat cushion 100 is lowered, while the position of the front portion of the seat cushion 100 is first raised and then lowered. During the process of the front portion of the seat cushion 100 being lowered, the height difference between the front portion of the seat cushion 100 and the rear portion of the seat cushion 100 becomes smaller, and the seat cushion 100 as a whole is transformed toward a nearly horizontal state, thereby making the seat cushion 100 have a smaller rearward tilt angle, preventing the seat cushion 100 from tilting back excessively and causing the buttocks to poke forward. When the user lies down to rest on the seat, he or she can lie as flat as possible, which helps to improve the user's comfort when using the seat.

[0099] When the user turns from leaning back / lying back to sitting upright, the backrest bracket 3 rotates forward (such as clockwise) and correspondingly pushes the second connection end 22 of the linkage frame 2 to drive the linkage frame 2 to move forward as a whole. During this process, the second connection end 22 of the linkage frame 2 is raised. At the first connection end 21 of the linkage frame 2 (corresponding to the front part of the seat cushion 100), the first transmission member 9 rotates forward (such as clockwise), and the connection point between the first transmission member 9 and the first connection end 21 of the linkage frame 2 gradually rises, so that the position of the first connection end 21 of the linkage frame 2 is raised. The connection point between the first transmission member 9 and the first connection end 21 of the linkage frame 2 drops immediately after passing the highest point, so that the position of the first connection end 21 of the linkage frame 2 is lowered. That is, when the user turns from leaning back / lying back to sitting upright, the position of the rear part of the seat cushion 100 is raised, while the position of the front part of the seat cushion 100 is first raised and then lowered. During the process of lowering the position of the front part of the seat cushion 100, the height difference between the front and rear parts of the seat cushion 100 will become smaller, and the seat cushion 100 as a whole will change to a horizontal state.

[0100] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A seat, characterized in that: include: base; A linkage frame, movably connected to the base, and the linkage frame is fixedly connected to the seat cushion; A backrest bracket is rotatably connected to the base and is also transmission-connected to the linkage frame. The backrest bracket is used to mount the backrest of the seat; When the backrest bracket rotates relative to the base, the backrest bracket drives the linkage frame and the seat cushion to move relative to the base.

2. The seat according to claim 1, characterized in that The linkage skeleton comprises: A first connecting end, movably connected to the base; The second connecting end is transmission-connected to the backrest bracket.

3. The seat according to claim 2, characterized in that The first connecting end is slidably connected to the base.

4. The seat according to claim 3, characterized in that One of the first connecting end and the base is provided with a first guide groove, and the other one is provided with a first sliding member. The first sliding member can slide in the first guide groove, so that the linkage frame and the seat cushion move relative to the base.

5. The seat according to claim 4, characterized in that The first guide groove includes a first groove section and a second groove section connected to each other. The first groove section is arranged obliquely upward toward the rear side of the seat, and the second groove section is arranged obliquely upward toward the front side of the seat.

6. The seat according to claim 5, characterized in that An inclination angle of the first slot section relative to a vertical plane of the base is greater than an inclination angle of the second slot section relative to the vertical plane of the base.

7. The seat according to claim 5, characterized in that At least one of an end of the first trough section away from the second trough section and an end of the second trough section away from the first trough section is open.

8. The seat according to claim 3, characterized in that One of the first connecting end and the base is provided with a second guide groove, and the other one is provided with a second sliding member, the second guide groove extends along the front and rear direction of the base, and the second sliding member can slide in the second guide groove, so that the linkage frame and the seat cushion move forward and backward relative to the base.

9. The seat according to claim 2, characterized in that The seat further comprises a first transmission member, one end of the first transmission member is connected to the base, and the other end of the first transmission member is connected to the first connection end, wherein: At least one of the first connecting end and the base is rotatably connected to the first transmission member.

10. The seat according to claim 9, characterized in that The first transmission member is arranged to be inclined toward the front side of the seat in a front-rear direction of the seat.

11. The seat according to claim 2, characterized in that The backrest bracket is slidably connected to the second connection end.

12. The seat according to claim 11, characterized in that One of the second connecting end and the backrest bracket is provided with a third guide groove, and the other is provided with a third sliding member adapted to the third guide groove. The third sliding member can slide in the third guide groove, so that the linkage frame drives the seat cushion to move relative to the base.

13. The seat according to claim 12, characterized in that The third guide groove extends along the longitudinal direction of the base, so that the linkage skeleton drives the seat cushion to move longitudinally relative to the base.

14. The seat according to any one of claims 11 to 13, characterized in that A resisting structure is constructed on one side of the base facing the linkage frame, and the resisting structure is used to limit the rotation angle of the linkage frame relative to the base.

15. The seat according to any one of claims 2 to 10, characterized in that: The seat further includes a second transmission member, one end of which is transmission-connected to the backrest bracket, and the other end of which is rotationally connected to the base, and the second transmission member is used to rotationally connect to the second connection end.

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