Movable frame suitable for seat and seat

Abstract

The utility model relates to the field of household article machinery, in particular to the structural design of a seat frame. According to the technical scheme, the movable frame suitable for the seat comprises a main frame, a seat frame, a back frame, a leg frame and a driving device, the driving device comprises a base connected to the main frame and a push rod connected with the base, the movable frame further comprises a middle movable frame, the main frame is provided with a straight groove and a raising groove, and the middle movable frame is provided with a lifting groove. The grooving direction of the upward raising groove is upward raising along the push-out direction of the push rod, and the push rod is connected with the middle moving frame and pushes the middle moving frame to slide along the straight groove; the utility model aims to provide the movable frame suitable for the seat and the seat, which are strong in generality, not only suitable for sofa chairs, massage chairs and automobile seats, but also suitable for seat products with small volumes, such as electronic sports chairs, ergonomic chairs and the like. And more reasonable transmission sequence logic is adopted in the whole movement process, so that the comfort degree of the frame in the movement process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of household goods machinery, and specifically relates to the structural design of a seat frame. BACKGROUND

[0002] With the progress of the times and the improvement of living standards, in addition to the traditional support function, comfort and wrapping needs are increasingly concerned. High-end products such as massage sofas, single sofas, gaming chairs, and ergonomic chairs have gradually become mainstream products in the market.

[0003] In these products, in order to effectively support each part of the user's body, the support area is often increased. For example, the Chinese patent document with publication number CN202323163483.0 discloses a sofa that increases the support area, including three main support frames for hip support, leg support, and back support. In order to further improve comfort, the support components are movable. For example, the Chinese patent document with publication number CN113509022A discloses a functional sofa chair, in which the three main support pieces, namely the seat cushion, the waist rest, and the leg rest, are respectively provided with electric push rods and tracks, so that the three support pieces can slide along the tracks, providing more personalized and flexible support for the user.

[0004] Although this provides a more comfortable experience for the user, there are two technical defects:

[0005] Firstly, most products on the market are independent moving types. That is, the seat cushion, waist rest, and leg rest require three sets of tracks, three sets of oil cylinders, gas cylinders, or electric steel to drive them respectively. This not only causes an increase in production costs, but also causes an increase in volume. The three sets of driving devices require a lot of layout space, which makes the entire sofa chair bulky, and it is difficult to apply such as a gaming chair, a single ergonomic chair, and other relatively thin products.

[0006] Secondly, even if the design is made to be a combined moving type in order to compress costs, that is, a set of driving devices is used to drive the three components, the driving sequence of the three components is usually leg rest, seat cushion, and waist rest. That is, the leg rest moves first, then the seat cushion moves, and finally the waist rest moves. This affects comfort during adjustment, for example, when the leg rest has been moved to almost horizontal, the waist rest and the seat cushion still maintain an upright sitting posture, that is, an almost vertical state. At this time, this posture is not comfortable for the human body. INVENTION CONTENTS

[0007] The utility model discloses a purpose is to provide the movable frame and seat suitable for seat, and the versatility is strong, not only can be suitable for sofa chair, massage chair, car seat, also can adapt to such as e-sports chair, ergonomic chair etc. Small volume seat product, and the whole movable process adopts more reasonable transmission sequence logic, improves the user comfort of frame movable process.

[0008] The utility model discloses a movable frame suitable for seat, contain main frame, sit frame, back frame and leg support, still contain drive arrangement, drive arrangement contain the base of connecting on main frame and with base connection's push rod, still contain middle movable frame, the straight groove and the upper groove of being set up on main frame, the groove direction of upper groove is along the push rod and pushes out direction and goes up, push rod connects middle movable frame, and the middle movable frame slides along straight groove is pushed;

[0009] Middle movable frame contains middle slide, the slide groove of being set up on middle slide and the push plate of connecting on middle slide;

[0010] Still contain swing frame no. 1, swing frame no. 1 is slidably connected with upper groove through link frame shaft;

[0011] The slide groove contains smooth groove and the vertical groove that extends in vertical direction and is through with smooth groove, is equipped with the push edge for pushing link frame shaft in vertical groove and advances;

[0012] Swing frame no. 1 is connected with sit frame, and is connected with back frame;

[0013] Leg support is connected with swing frame no. 2, and push plate is used for and swing frame no. 2 is contacted to push leg support and moves.

[0014] As the preferred embodiment of the utility model, the middle movable frame comprises a connecting rod plate connected with the push rod, and the middle slide plate has two and is connected with the two sides of the connecting rod plate respectively.

[0015] As the preferred embodiment of the utility model, the straight groove is more than two and is arranged in different height directions.

[0016] As the preferred embodiment of the utility model, the main frame further comprises two side frames, a horizontal connecting frame connecting the two side frames, and a fixed frame connected to the middle part of the horizontal connecting frame, and the straight groove and the upper groove are both arranged on the fixed frame.

[0017] As the preferred embodiment of the utility model, the side frame is provided with a guide groove, and the sit frame slides along the guide groove through a guide wheel.

[0018] As the preferred embodiment of the utility model, each side frame is provided with two or more guide grooves, and the arrangement direction is the push-out direction of the push rod.

[0019] As the preferred of the utility model, the swing frame one is connected with a pull plate, the pull plate is connected with the back frame, the back frame is connected with the seat frame, the back frame rotates relative to the seat frame under the drive of the pull plate.

[0020] As the preferred of the utility model, the seat frame is hinged with an intermediate plate, one end of the intermediate plate is connected with the pull plate, the other end is connected with a connecting rod, the connecting rod is connected with the fixed frame.

[0021] As the preferred of the utility model, the swing frame two comprises a contact wheel, the contact wheel is in contact with the push plate.

[0022] The seat comprises the movable frame suitable for the seat, and further comprises a seat stool, a waist rest and a leg support, the seat stool is installed on the seat frame, the waist rest is installed on the back frame, and the leg support is installed on the leg support frame.

[0023] In summary, the utility model has the following beneficial effects:

[0024] 1. The moving logic of the whole movable frame is that the seat frame moves forward first, and the back frame turns backward, and at this time, the leg support frame is not moved, and the human body will not appear the uncomfortable posture of high leg and straight back.

[0025] 2. In the process from state one to state two, the back frame turns backward and the seat frame moves forward synchronously, and the synchronization is good.

[0026] 3. Only one driving device is used in the whole process, the requirement for space is low, and the cost is more controllable.

[0027] 4. The back frame turning backward and the seat frame moving forward both depend on the same transmission component swing frame one, the synchronization of the two movements is further improved, and the occupation pressure of the horizontal space in the seat is reduced.

[0028] 5. In state two, the separation of the transmission device does not rely on the electric control switching of the precise electronic components, but relies on the upward design of the upward groove to separate the power. Such design makes the whole seat not easy to be affected by the interference and failure of the electronic components, and the power transmission and power separation are more stable and reliable.

[0029] 6. The guide groove on the side frame makes the movement of the whole seat frame more stable.

[0030] 7. In the normal state, the leg slide frame is retracted, the leg support frame is lowered, and is collected below the seat frame 2, without occupying space.

[0031] 8. When the leg support is needed, the leg support frame is raised, the leg slide frame is slid forward, the distance of the support area is effectively prolonged, and the foot support of the user with high height and long legs can be applied.

[0032] 9. Throughout the process, the actual power comes from only one drive unit, eliminating the need for multiple drive units and further reducing the pressure on space placement.

[0033] 10. The connection between the ball joint plate and the seat frame relies on a ball bearing, which allows the ball joint plate to move relative to the seat frame in multiple directions.

[0034] 11. Due to the presence of the connecting plate as an intermediary component, the forward sliding action of the foot slide and the forward swinging action of the leg base have good consistency and synchronization, making the movement of the entire leg support smoother and more stable.

[0035] 12. A reset torsion spring is provided between the fixed plate and the transmission plate, so that when the drive device returns to its original position during the swing of the entire leg support, the torque of the reset torsion spring can provide an additional restoring force, making the swing smoother. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of state one of Embodiment 1;

[0037] Figure 2 yes Figure 1 A magnified view of the central region;

[0038] Figure 3 This is a schematic diagram of the main frame;

[0039] Figure 4 This is a schematic diagram of the central moving frame;

[0040] Figure 5 yes Figure 1 Another perspective of the diagram;

[0041] Figure 6 This is a schematic diagram of state two of Example 1;

[0042] Figure 7 This is an enlarged view of the central region under state two;

[0043] Figure 8 This is a schematic diagram of the leg support in the folded state of Embodiment 1;

[0044] Figure 9 This is a schematic diagram of the leg support in the extended state of Embodiment 1;

[0045] Figure 10 yes Figure 9 A magnified view of a portion of the image.

[0046] In the picture:

[0047] 1. Main frame; 11. Fixed frame; 12. Side frame; 14. Straight groove; 15. Upward groove; 16. Horizontal connecting frame; 17. Guide groove; 2. Seat frame; 3. Back frame; 4. Swing frame one; 5. Central moving frame; 51. Connecting rod plate; 52. Central sliding plate; 53. Push plate; 54. Sliding groove; 541. Vertical groove; 542. Smooth groove; 55. Push edge; 6. Swing frame two; 61. Contact wheel; 7. Leg support; 71. Transmission. 711. Motion device, 712. Fixed plate, 713. Transmission plate, 714. Push plate, 72. Leg slide, 721. Horizontal slide groove, 73. Leg base frame, 74. Horizontal connecting bar, 741. Short connecting bar, 742. Diagonal connecting bar, 75. Ball connecting plate, 76. Sliding connecting plate, 761. Sliding connecting head, 81. Connecting frame shaft, 82. Pull plate, 83. Intermediate plate, 84. Connecting rod, 9. Drive device, 91. Base, 92. Push rod. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to the accompanying drawings.

[0049] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0050] Example 1, as Figure 1 As shown, the movable frame suitable for a chair includes a main frame 1, which can be considered the main frame of the entire chair. Structural components such as chair legs can be installed on its lower surface. During subsequent movement, the main frame 1 can be considered a stationary component. A drive device 9 is installed on the main frame 1. In this case, the seat frame 2, back frame 3, and leg support 7 are three moving components, serving as the support frames for the user's seat, backrest, and leg rest, respectively. The movement of these three components depends on the operation of a single drive device 9, rather than three separate drive components. The fewer drive devices 9, the more space is saved, and the overall weight of the product is reduced. This frame structure is suitable not only for sofa chairs and massage chairs but also for gaming chairs and ergonomic chairs—products with relatively thin and lightweight designs. The specific form of the drive device 9 can be an electric motor, hydraulic cylinder, pneumatic cylinder, or other drive methods; this case does not impose any restrictions.

[0051] Figure 3 and Figure 4 These are structural schematic diagrams of the main frame 1 and the intermediate moving frame 5, respectively. Figure 2 This is a schematic diagram of these components after installation, in state one, i.e., the initial state. As shown in these three figures, the main frame 1 includes a central frame 11 and two side frames 12 located on both sides, which are connected to each other by cross bracing 16 to increase structural strength.

[0052] Figure 2 The drive unit 9 includes a base 91, which is mounted on the main frame 1 and also acts as a stationary component. The push rod 92 extends along a linear trajectory. Figure 4 As shown, the push rod 92 is connected to the connecting rod plate 51, so that the entire moving frame 5 slides relative to the main frame 1 as a moving member.

[0053] like Figure 3 and Figure 4 As shown, two parallel, longitudinally extending straight grooves 14 are provided on the fixed frame 11. The direction of their longitudinal extension is also the trajectory direction of the push rod 92. The number of straight grooves 14 is unlimited; in this case, there are two, arranged in the height direction. And in the rear half of the middle sliding plate 52, i.e. Figure 4 On the right side, a corresponding connecting shaft and pulley can be set so that the pulley slides along the straight groove 14 as a track.

[0054] A sliding groove 54, L-shaped, is provided on the sliding plate 52. It comprises a rear half, a straight smooth groove 542, and a front half, a vertical groove 541, which are continuous and extend vertically. The two grooves are approximately 90° apart. A push edge 55 is provided on the vertical groove 541, where an axle and a wheel are also located; hereinafter referred to as wheel assembly one. The push edge 55 and wheel assembly one have a contacting and pushing relationship. This wheel assembly one is also located on... Figure 3 The upward groove 15 in the middle extends slightly upward as it moves forward, and this extension can be a straight line or an arc.

[0055] And this wheelset is simultaneously connected to Figure 1 The display stand in the middle is 4.

[0056] The entire transmission mechanism is as follows: From the beginning, push rod 92 continuously pushes forward, driving the entire central frame 5 forward. At this time, push edge 55 abuts against wheel set 1, propelling it forward. Wheel set 1 drives swing frame 4 forward.

[0057] like Figure 5 As shown, the swing frame 4, as a key component, determines the movement of the seat frame 2 and the back frame 3. Specifically, the swing frame 4 is connected to the intermediate plate 83 via the pull plate 82, driving the intermediate plate 83 forward, that is, through the intermediate plate 83... Figure 3 The lowest connecting hole is used for connection. The middle hole of the intermediate plate 83 is used to connect with the seat frame 2, thus driving the seat frame 2 to move forward. The uppermost hole of the intermediate plate 83 is used to connect with one end of the connecting rod 84, the other end of which is connected to the main frame 1. In summary, the forward movement of the swing frame 4 drives the forward movement of the seat frame 2.

[0058] Meanwhile, the other end of the pull plate 82 is connected with the lower end of the back frame 3, and the lower end of the back frame 3 is pulled forward. The middle part of the back frame 3 is hinged with the seat frame 2, and the hinge point is referred to as hinge point a. Since the forward moving speed of the pull plate 82 is faster than that of the seat frame 2, the pull plate 82 is forward relative to the seat frame 2, and the upper end of the back frame 3 is backward, that is Figure 5 the back frame 3 in the figure is centered on the hinge point a, and the upper end is backward.

[0059] At this point, the process from state one to state two, hereinafter referred to as stage A, in this stage, the seat frame 2 and the back frame 3 move synchronously, the seat frame 2 gradually moves linearly forward, the back frame 3 gradually reclines, the lower end moves forward, and the upper end moves backward; and the leg support 7 is not moved.

[0060] Figures 1 to 5 The five figures are all schematic diagrams of the initial state of the seat, that is, state one. Figure 6 is a schematic diagram of state two, it can be seen that the back frame 3 has been reclined, and the seat frame 2 has been moved forward. The seat frame 2 is connected with a guide wheel, and the side frame 12 is provided with a guide groove 17, the guide wheel moves in the guide groove 17, and the movement of the whole seat frame 2 is more stable.

[0061] As shown in Figure 3 and Figure 4 , since the wheel set one is in the upward groove 15, the advancing of the wheel set one gradually rises. The trajectory of the middle moving frame 5 is determined by the straight groove 14, and the middle moving frame does not rise, so the wheel set one and the push edge 55 will be separated. When the push rod 92 moves forward all the time and reaches state two, the state at this time is shown in Figure 7 . The position relationship diagram of the middle moving frame 5, the main frame 1, the swing frame two 6 and the swing frame one 4 is shown in Figure 7 . In the figure, the wheel set one connected to the swing frame one 4 is higher than the push edge 55, and the two are separated, so the push edge 55 will not transmit the driving force to the swing frame one 4 any more. Therefore, the seat frame 2 and the back frame 3 will not receive the driving force from the push rod 92 any more.

[0062] The leg support 7 is connected with the swing frame two 6, and contains a contact wheel 61. In state one, the push plate 53 is far away from the contact wheel 61, and the contact wheel 61 does not receive the contact force. With the pushing out of the push rod 92, the push plate 53 advances, and reaches state two, the push plate 53 has contacted the contact wheel 61, thereby providing the driving force to the swing frame two 6. With the continuous advancing of the push rod 92, the leg support 7 starts to move.

[0063] At this point, the moving logic of the whole movable frame is that the seat frame 2 moves forward first, and the back frame 3 reclines. The two move synchronously, and the coordination is good. At this time, the leg support 7 is not moved, and the human body will not appear the uncomfortable posture of high legs and straight back. When reaching state two, that is, the set reclining posture, the legs are slowly moved and lifted, thereby improving the comfort.

[0064] The whole process only uses one driving device 9, has low space requirement, and is more cost-effective.

[0065] The movement mode of the leg support 7 is described in detail below.

[0066] As shown in Figure 8 , Figure 9 and Figure 10 , the swing frame two 6 acts as a transmission component, which drives the whole leg support 7 to flip forward and backward in the vertical direction relative to the seat frame 2.

[0067] Specifically, the transmission device 71 is a multi-link structure, which is arranged in two sets, one on the left and one on the right in the seat width direction. Each set is identical, and the fixed plate 711 is fixedly connected to the lower surface of the seat frame 2, which can be regarded as a fixed part relative to the seat frame 2. The swing frame two 6 is connected to the transmission plate 712, one end of the transmission plate 712 is connected to the fixed plate 711, and the other end is hingedly connected to the push plate 713. The other end of the push plate 713 is hingedly connected to the leg base frame 73. Thus, during the forward movement of the swing frame two 6, power is provided to the leg base frame 73, and the leg base frame 73 swings upward relative to the seat frame 2.

[0068] The leg slide frame 72 is slidably connected to the leg base frame 73 in the front-back direction, and the leg slide frame 72 includes a guide straight slot, and the leg slide frame 72 includes an insertion slide piece for cooperating with the guide straight slot. The cooperation of the two makes the sliding process more stable.

[0069] The leg slide frame 72 is the component that actually supports the human leg, and the power for the leg slide frame 72 to slide forward and backward relative to the leg base frame 73 comes from the slide connecting plate 76. As shown in Figure 9 and Figure 10 , the leg base frame 73 is connected to the horizontal connecting strip 74, and the slide connecting plate 76 is hingedly connected to the horizontal connecting strip 74. The leg slide frame 72 includes a horizontal connecting groove 721 extending in the horizontal width direction, and the front end of the slide connecting plate 76 is provided with a slide connecting head 761 arranged in the horizontal connecting groove 721. The rear end of the slide connecting plate 76 is connected to the seat frame 2 through the ball connecting plate 75. The connection between the ball connecting plate 75 and the seat frame 2 relies on a ball head bearing, which allows the ball connecting plate 75 to move in multiple directions relative to the seat frame 2. The slide connecting plate 76 and the ball connecting plate 75 are connected by an L-shaped flat iron, because the side of the ball connecting plate 75 is more vertically flipped, and the side of the slide connecting plate 76 is more horizontally flipped.

[0070] In summary, the movement principle of the whole leg support 7 is as shown in Figure 8 , the whole leg support 7 is initially in a retracted state, located below the seat frame 2, and does not contact the human leg. Then the driving device 9 starts to move, which drives the push plate 713 to swing upward and forward through the transmission of the swing frame two 6. Then, the leg base frame 73 swings forward and upward relative to the seat frame 2. As shown in Figure 9 andFigure 10 As shown, in the process of outward swing of the leg base frame 73, the sliding connecting plate 76 will rotate relative to the horizontal connecting bar 74. The ball connecting plate 75 will have horizontal rotation and vertical rotation relative to the seat frame 2, so the ball connecting plate 75 is connected to the seat frame 2 through a ball head bearing. In the process of rotation of the sliding connecting plate 76 relative to the horizontal connecting bar 73, the sliding connecting plate 76 will push the groove wall of the horizontal sliding groove 721 through the sliding head 761, thereby pushing the leg sliding frame 72 to slide forward relative to the leg base frame 73. Figure 9 And Figure 10 This is the state of upward swing of the leg support 7 and forward sliding of the leg sliding frame 72.

[0071] At this point, on the one hand, the leg sliding frame 72 is retracted in the normal state, the leg support 7 is swung downward and is collected below the seat frame 2, without occupying space. When leg support is needed, the leg support 7 is swung upward, and the leg sliding frame 72 is slid forward, effectively extending the distance of the support area, which can be applied to the foot support of users with high elevation and long legs. On the other hand, during the entire process, the only real power comes from a set of driving devices 9, without the need for multiple sets of driving, further reducing the pressure of space placement.

[0072] In addition, due to the existence of the intermediate part of the sliding connecting plate 76, the consistency and synchronization of the forward sliding action of the foot sliding frame 72 and the forward swing action of the leg base frame 73 are good, and the moving action of the entire leg support is more smooth and stable.

[0073] A reset torsional spring is arranged between the fixing plate 711 and the transmission plate 712. Due to the existence of the reset torsional spring, when the driving device 9 is reset during the swing-back process of the entire leg support 7, the torsional force of the reset torsional spring can provide an additional restoring force, making the swing-back more smooth.

[0074] A seat, a chair leg assembly is arranged on the lower surface of the main frame 1, a chair back is arranged on the back frame 3, and a seat cushion is arranged on the seat frame 2.

Claims

1. A movable frame suitable for a seat, comprising a main frame (1), a seat frame (2), a back frame (3) and a leg support (7), further comprising a driving device (9), the driving device (9) comprising a base (91) connected to the main frame (1) and a push rod (92) connected to the base (91), characterized in that: It also comprises a middle movable frame (5), the main frame (1) is provided with a straight slot (14) and a lifting slot (15), the lifting slot (15) is provided in the direction of lifting along the pushing direction of the push rod (92), the push rod (92) is connected with the middle movable frame (5) to push the middle movable frame (5) to slide along the straight slot (14); the middle movable frame (5) comprises a middle sliding plate (52), a sliding slot (54) provided on the middle sliding plate (52) and a push plate (53) connected with the middle sliding plate (52); it also comprises a swing frame (4), the swing frame (4) is connected with the lifting slot (15) through a connecting frame shaft (81); the sliding slot (54) comprises a smooth slot (542) and a vertical slot (541) extending in the vertical direction and penetrating through the smooth slot (542), the vertical slot (541) is provided with a pushing edge (55) for pushing the connecting frame shaft (81) to move forward; the swing frame (4) is connected with the seat frame (2) and the back frame (3); the leg support (7) is connected with a swing frame (6), the push plate (53) is used for abutting against the swing frame (6) to push the leg support (7) to move.

2. A movable frame suitable for a seat according to claim 1, characterized in that: The middle movable frame (5) comprises a connecting rod plate (51) for connecting with the push rod (92), the middle sliding plate (52) has two, which are connected on both sides of the connecting rod plate (51).

3. A movable frame suitable for a seat according to claim 1, characterized in that: The straight slot (14) is more than two, which are arranged in different height directions.

4. A movable frame suitable for a seat according to claim 1, characterized in that: The main frame (1) further comprises two side frames (12), a transverse connecting frame (16) connecting the two side frames (12) and a fixed frame (11) connected to the middle part of the transverse connecting frame (16), the straight slot (14) and the lifting slot (15) are both provided on the fixed frame (11).

5. A movable frame suitable for a seat according to claim 4, characterized in that: The side frame (12) is provided with a guide slot (17), the seat frame (2) slides along the guide slot (17) through a guide wheel.

6. A movable frame suitable for a seat according to claim 5, characterized in that: Each side frame (12) is provided with more than two guide slots (17), which are arranged in the pushing direction of the push rod (92).

7. A movable frame suitable for a seat according to claim 1, characterized in that: The swing frame (4) is connected with a pull plate (82), the pull plate (82) is connected with the back frame (3), the back frame (3) is connected with the seat frame (2), and the back frame (3) rotates relative to the seat frame (2) under the drive of the pull plate (82).

8. A movable frame suitable for a seat according to claim 7, characterized in that: The seat frame (2) is hinged with an intermediate plate (83), one end of the intermediate plate (83) is connected with the pull plate (82), the other end is connected with a connecting rod (84), and the connecting rod (84) is connected with the main frame (1).

9. A movable frame suitable for a seat according to claim 1, characterized in that: The swing frame (6) comprises an abutting wheel (61), the abutting wheel (61) abuts against the push plate (53).

10. A movable frame suitable for a seat according to claim 1, characterized in that: The leg support (7) comprises a leg base frame (73) rotating relative to the seat frame (2) under the drive of the driving device (9), a leg sliding frame (72) slidingly connected to the leg base frame (73), a cross connecting strip (74) connected to the leg base frame (73), and a sliding connecting plate (76) hinged to the cross connecting strip (74), wherein a horizontal sliding groove (721) is formed in the leg sliding frame (72), one end of the sliding connecting plate (76) comprises a sliding connecting head (761) sliding in the horizontal sliding groove (721), and the other end of the sliding connecting plate (76) is connected to a ball connecting plate (75), and the ball connecting plate (75) is connected to the seat frame (2) through a ball head bearing.

11. A living frame suitable for a seat according to claim 10, characterized in that: The cross connecting strip (74) is in a bent type, comprising a short connecting strip (741) and an inclined connecting strip (742), and the position of the inclined connecting strip (742) connected to the leg base frame (73) is closer to the seat frame (2) than the position of the short connecting strip (741) connected to the leg base frame (73).

12. A living frame suitable for a seat according to claim 10, characterized in that: The leg base frame (73) is connected to the seat frame (2) through a transmission device (71), the transmission device (71) comprises a fixed plate (711) connected to the seat frame (2), a transmission plate (712) hinged to the fixed plate (711), and a pushing plate (713) hinged to the transmission plate (712) and the leg base frame (73) at two ends, and the driving device (9) applies power to the transmission plate (712).

13. A living frame suitable for a seat according to claim 12, characterized in that: A reset torsion spring is arranged between the fixed plate (711) and the transmission plate (712).

14. A living frame suitable for a seat according to claim 10, characterized in that: The leg base frame (73) comprises a guide straight groove, and the leg sliding frame (72) comprises an insertion sliding piece matched with the guide straight groove.

15. A seat, characterized by The movable frame suitable for a seat comprises a seat frame (2), a back frame (3), a leg support (7), a driving device (9), a transmission device (71), a fixed plate (711), a transmission plate (712), a pushing plate (713), a leg base frame (73), a leg sliding frame (72), a cross connecting strip (74), a sliding connecting plate (76), a sliding connecting head (761), a ball connecting plate (75), a horizontal sliding groove (721), an inclined connecting strip (742), and a short connecting strip (741).

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