Foot support assembly and seat

Abstract

The invention discloses a foot support assembly and a seat. The foot support assembly comprises a fixed seat, a movable rod, a foot support and a locking piece, the movable rod is slidably mounted on the fixed seat so that the movable rod can move between a first position and a second position, and a first elastic element is arranged between the movable rod and the fixed seat; the foot support is pivoted to the front end of the movable rod so that the foot support can swing between a third position and a fourth position relative to the movable rod. A second elastic element is arranged between the foot support and the movable rod; a clamping part is arranged on the movable rod, and the locking piece is movably mounted on the fixed seat; a limiting part is arranged on the foot support, a limiting piece is movably arranged on the movable rod, when the movable rod is located at the first position, the limiting piece and the limiting part are combined to jointly form a limiting mechanism for limiting the foot support at the third position, and when the movable rod is located at the second position, the limiting piece is limited by the fixing base to be in the state of being separated from the limiting part. According to the invention, the opening process of the foot support becomes simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a footrest assembly and a seat. Background Art

[0002] In order to prevent the user's legs from hanging in the air, some existing office chairs and e-sports chairs are usually equipped with footrest assemblies. In order to prevent the protruding footrest assembly from affecting the user's sitting posture in some usage scenarios, the footrest assembly is usually configured to be foldable and able to be stored under the seat cushion of the chair. For example, some footrest assemblies include a footrest and a movable rod. The movable rod is movably installed under the seat cushion or on a fixed seat on the seat base. The footrest is connected to the front end of the movable rod, and the movable rod drives the footrest to move forward and backward relative to the fixed seat to extend the footrest or store the footrest under the seat cushion. However, during use, the user needs to bend down and lower his head, and needs to manually move the footrest forward, which makes the operation process extremely inconvenient. Summary of the Invention

[0003] The object of the present invention is to provide a footrest assembly and a seat, which can enable the footrest to pop out automatically, thereby simplifying the operation.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A footrest assembly, comprising a fixed seat, a movable rod, a footrest, and a locking member;

[0006] The movable rod is slidably mounted on the fixed seat so that the movable rod can move relative to the fixed seat between a first position and a second position in a front-to-rear direction; a first elastic element is provided between the movable rod and the fixed seat, the first elastic element being used to apply elastic stress to the movable rod so that the movable rod always maintains a tendency to move toward the second position;

[0007] The footrest is pivotally connected to the front end of the movable rod so that the footrest can swing relative to the movable rod between a third position and a fourth position about an axis extending in the left-right direction. A second elastic element is provided between the footrest and the movable rod, and the second elastic element is used to apply elastic stress to the footrest so that the footrest always maintains a tendency to swing toward the fourth position.

[0008] The movable rod is provided with a locking portion, and the locking member is movably mounted on the fixed seat so that the locking member can limit the freedom of movement of the movable rod relative to the fixed seat when the locking member is engaged with the locking portion, and can release the limitation on the freedom of movement of the movable rod relative to the fixed seat when the locking member is separated from the locking portion;

[0009] A limiting portion is provided on the footrest, and a limiting piece is movably configured on the movable rod. When the movable rod is in the first position, the limiting piece is combined with the limiting portion and together form a limiting mechanism that limits the footrest to the third position. When the movable rod is in the second position, the limiting piece is limited by the fixed seat to a state separated from the limiting portion.

[0010] Preferably, the limiting member is a limiting latch movably mounted on the front end of the movable rod, and a third elastic element for pushing the limiting latch forward is provided between the movable rod and the limiting latch.

[0011] Preferably, the front end portion of the movable rod is provided with a first sliding groove extending along the front-to-back direction, a first slider is embedded in the first sliding groove for sliding, the limit pin is fixedly connected to the first slider, and the two ends of the third elastic element respectively press against the rear end surface of the first slider and the first sliding groove; the rear end portion of the movable rod is provided with a second sliding groove extending along the front-to-back direction, a second slider is embedded in the second sliding groove for sliding, and the second slider is connected to the first slider through a connecting piece. During the process of the movable rod moving from the first position to the second position relative to the fixed seat, the second slider is limited by the fixed seat so that the connecting piece pulls the first slider backward relative to the movable rod, so that the limit pin moves to a state separated from the limiting part of the rotating seat.

[0012] Preferably, the movable rod is provided with a receiving groove whose two ends are respectively connected to the first slide groove and the second slide groove, and the connecting member is a pull rope or a connecting rod placed in the receiving groove, and the two ends of the pull rope or the connecting rod are respectively connected to the first slider and the second slider.

[0013] Preferably, a connecting seat is fixed to the front end portion of the movable rod, and a rotating seat is fixed to the footrest. The rotating seat and the connecting seat are pivotally connected so that the rotating seat can swing relative to the connecting seat between a third position and a fourth position around the axis; a guide hole is provided on the connecting seat for inserting a limiting member to guide the limiting member to move in the front-rear direction, and a recess is provided on the outer edge surface of the rotating seat facing the guide hole, and the upper end surface of the recess forms a limiting portion. When the movable rod is in the first position, the limiting member is placed in the recess and abuts against the lower end surface of the upper end surface of the recess so that the limiting member and the upper end surface of the recess together form a limiting mechanism;

[0014] Alternatively, the first elastic element is a tension spring, a connecting hook is provided at the rear end of the movable rod, a connecting screw is threaded on the fixing seat, and both ends of the tension spring are respectively hung on the connecting hook and the connecting screw.

[0015] Preferably, a connecting seat is fixed to the front end of the movable rod, and a rotating seat is fixed on the footrest. The rotating seat is pivotally connected to the connecting seat so that the rotating seat can swing relative to the connecting seat around the axis between the third position and the fourth position; the second elastic member is a torsion spring placed between the rotating seat and the connecting seat.

[0016] Preferably, the connecting seat includes an outer connecting block fixed to the front end of the movable rod and an inner connecting block opposite to the outer connecting block. The inner connecting block and the outer connecting block are fixed together by a connecting bolt that passes through the two, and a receiving groove is formed between the inner connecting block and the outer connecting block. The axis is the central axis of the connecting bolt, and the rotating seat is embedded in the receiving groove and is pivotally connected to the connecting bolt; an installation groove is provided on the rotating seat at one end facing the inner connecting block, and a turntable that pivotally cooperates with the rotating seat is embedded in the installation groove, a protrusion is provided in the installation groove, and an arc-shaped slide groove arranged around the axis is provided on the turntable. The protrusion is embedded in the arc-shaped slide groove and can slide between the two end surfaces of the arc-shaped slide groove; one end of the torsion spring is plugged and fixed on the inner connecting block, and the other end is plugged and fixed on the turntable.

[0017] Preferably, the front end of the movable rod is fixedly connected to the connecting seat, and the locking portion is a slot provided on the connecting seat; the fixed seat is installed on the seat, and the locking member includes a rotating end and a free end, and the free end has a hook matching the slot, and the rotating end is pivotally connected to the fixed seat so that the locking member can swing up and down relative to the fixed seat, and when the locking member swings up and down, the hook is engaged with the card in the slot or the hook is disengaged from the slot, and a torsion spring is provided between the locking member and the fixed seat or the seat, and the torsion spring is used to apply elastic stress to the locking member so that the hook always maintains a tendency to swing toward the slot, and a shift block is protruding from the rotating end of the locking member, and the shift block is used to drive the hook to swing when it is shifted so that the hook is disengaged from the slot.

[0018] Preferably, the movable rod is provided with a plurality of recessed portions arranged along the front-to-back direction, and adjacent recessed portions are smoothly transitioned through convex arc surfaces. The plurality of recessed portions and the plurality of arc surfaces together form a wavy mating surface. The fixed seat is movably provided with a pressure block and a fourth elastic element. The fourth elastic element is used to apply elastic stress to the pressure block to press the pressure block against the mating surface.

[0019] A seat including the above-mentioned footrest assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, by operating the locking part, the footrest can be flipped after the movable rod moves forward a certain distance. That is to say, after the movable rod drives the footrest to move forward a certain distance from the position hidden under the seat cushion, the footrest can be unfolded from the folded state with the movable rod to the use state, so that the footrest can automatically pop out from under the seat cushion. The user does not need to bend down to pull the footrest forward and then flip it over, making the opening process of the footrest simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an assembly diagram of the present invention;

[0023] Figure 2It is a schematic diagram of the structure of the present invention and illustrates the folded state of the present invention;

[0024] Figure 3 A schematic diagram of the present invention in an unfolded state;

[0025] Figure 4 for Figure 1 Schematic diagram of the second structure of the middle movable rod;

[0026] Figure 5 for Figure 1 Magnified view at point A in the middle;

[0027] Figure 6 A cross-sectional view of the connection seat and the rotational engagement portion of the present invention;

[0028] Figure 7 This is a schematic diagram of the assembly of the connecting seat and the rotating seat of the present invention;

[0029] Figure 8 for Figure 7 Schematic diagram of the structure of the Chinese and foreign connection blocks;

[0030] Figure 9 for Figure 7 A schematic diagram of a working state of the middle turntable and the inner connecting block;

[0031] Figure 10 for Figure 7 Schematic diagram of another working state of the middle turntable and the inner connecting block.

[0032] Wherein: 10, fixing seat; 101, connecting screw; 11, bushing; 12, mounting hole; 13, pressure block; 14, spring; 20, movable rod; 201, connecting hook; 202, recessed portion; 203, arc surface; 21, tension spring; 22, first slide; 23, first slider; 24, spring; 25, limit pin; 26, second slide; 27, second slider; 28, pull rope; 29, receiving slot; 30, footrest; 50, rotating seat; 5 01. Recessed position; 502. Upper end surface; 51. Turntable; 511. Arc-shaped slide groove; 5111. End surface; 5112. End surface; 52. Mounting groove; 53. Protrusion; 60. Connecting seat; 61. Inner connecting block; 62. Outer connecting block; 621. Slot; 622. Guide hole; 63. Torsion spring; 64. Connecting bolt; 70. Locking piece; 701. Free end; 702. Rotating end; 703. Hook; 704. Shift block; 71. Torsion spring. DETAILED DESCRIPTION

[0033] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and cannot be understood as limiting this application.

[0034] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] like Figure 1-10 As shown, a footrest assembly of the present invention is used on a seat, and includes a fixed seat 10, a movable rod 20, a footrest 30, and a locking member 70. The fixed seat 10 is fixedly connected to the base of the seat or under the seat cushion. The movable rod 20 is used to drive the footrest 30 to move forward and backward, so that the footrest 30 can move forward from a position hidden under the seat cushion, so that the footrest 30 is in use after being moved out, and is used to support the user's feet and legs. When the footrest 30 moves forward from under the seat cushion, the footrest 30, which is in a folded state with the movable rod 20, is unfolded.

[0037] Specifically, the movable rod 20 is slidably installed on the fixed seat 10, so that the movable rod 20 can move relative to the fixed seat 10 between a first position and a second position in the front-to-back direction. When the movable rod 20 is in the first position, its front end is placed at the fixed seat 10, and when the movable rod 20 is in the second position, its rear end is placed at the fixed seat 10. A tension spring 21 is arranged between the movable rod 20 and the fixed seat 10, and one end of the tension spring 21 is hung on the movable rod 20 and the other end is hung on the fixed seat 10. An elastic stress is applied to the movable rod 20 by the tension spring 21, so that the movable rod 20 always maintains a tendency to move forward relative to the fixed seat 10. That is, the elastic stress of the tension spring 21 is utilized to make the movable rod 20 always maintain a tendency to move toward the second position.

[0038] The footrest 30 is pivotally connected to the front end of the movable rod 20, so that the footrest 30 can swing around the axis O between the third position and the fourth position relative to the movable rod 20. The extension direction of the axis O is consistent with the left and right direction, that is, the footrest 30 can swing up and down relative to the movable rod 20. When the footrest 30 is in the third position, the footrest 30 is folded under the movable rod 20, so that the space occupied by the footrest 30 and the movable rod 20 is smaller and can be stored under the seat cushion. When the footrest 30 is in the fourth position, the footrest 30 flips upward to the front side of the movable rod 20.

[0039] A torsion spring 63 is provided between the footrest 30 and the movable rod 20. The torsion spring 63 is used to apply an elastic stress to the footrest 30 so that the footrest 30 always maintains a tendency to swing toward the fourth position; when the movable rod 20 is in the first position and the footrest 30 is in the third position, the movable rod 20 and the footrest 30 are locked respectively by the locking member 70 and the limiting member, so that the tension spring 21 and the torsion spring 63 are squeezed and in a state of storing force. When the locking member 70 no longer limits the movable rod 20 and the limiting member no longer limits the footrest 30, the elastic stress of the tension spring 21 and the torsion spring 63 is released, so that the movable rod 20 moves to the second position and the footrest 30 swings to the fourth position. When the stress release of the tension spring 21 and the torsion spring 63 is completed at the same time, the flipping of the footrest 30 and the translation of the movable rod 20 can be carried out simultaneously, thereby realizing the rapid deployment of the footrest 30.

[0040] Specifically, a locking portion is provided at the front end of the movable rod 20, and the locking member 70 is movably mounted on the fixed seat 10, so that the locking member 70 can be combined with the locking portion to limit the freedom of movement of the movable rod 20 relative to the fixed seat 10. At the same time, the movably mounting of the locking member 70 and the fixed seat 10 can release the limitation on the freedom of the movable rod 20 when the locking member 70 is separated from the locking portion, so that the movable rod 20 can move in the front and rear directions relative to the fixed seat 10. When the locking member 70 is combined with the locking portion, the locking member 70 locks the movable rod 20 and the fixed seat 10, so that the tension spring 21 is in a stretched state, that is, the tension spring 21 is in a force storage state, and relevant operations are performed on the locking member 70 to disengage the locking member 70 from the locking portion, and the tension spring 21 in the force storage state can pull the movable rod 20 forward.

[0041] A limiting portion is provided on the footrest 30, and a limiting piece is provided on the movable rod 20. When the movable rod 20 is in the first position, the limiting piece on the movable rod 20 is combined with the limiting piece on the footrest 30, and the limiting piece and the limiting piece together form a limiting mechanism, which is used to limit the footrest 30 to the third position. That is, when the movable rod 20 is in the first position, the footrest 30 is in the third position. When the movable rod 20 is in the second position, the limiting piece is limited by the fixed seat 10 to a state separated from the limiting piece, and the limiting piece is separated from the limiting piece, so that the limiting piece no longer limits the rotational freedom of the footrest 30, so that under the elastic stress of the torsion spring 63, The footrest 30 is swung from the third position to the fourth position; specifically, when the movable rod 20 is in the first position, its front end is located at the fixed seat 10, and the movable rod 20 is in the second position through the elastic stress of the tension spring 20, so that the rear end of the movable rod 20 is located at the fixed seat 10. In the process of the movable rod 20 moving forward, the limiting member on the movable rod 20 can be pushed or pulled backward by the fixed seat 10, or in other ways, during the relative movement of the movable rod 20 and the fixed seat 10, the limiting member is moved backward and separated from the limiting part on the footrest 30. In this way, the movement of the movable rod 20 and the swinging of the footrest 30 are linked to each other.

[0042] In the present invention, by operating the locking member 70, the footrest 30 can be flipped after the movable rod 20 moves forward a certain distance. That is to say, after the movable rod 20 drives the footrest 30 to move forward a certain distance from the position hidden under the seat cushion, the footrest 30 can be unfolded from the folded state with the movable rod 20 to the use state, so that the footrest 30 can automatically pop out from under the seat cushion. The user does not need to bend down to pull the footrest 30 forward and then flip it over, making the opening process of the footrest 30 simple and convenient.

[0043] It should be noted that the tension spring 21 connected between the movable rod 20 and the fixed base 10 can be replaced by other elastic elements capable of pushing the movable rod 20 forward and backward. For example, a spring or the like can be installed between the front end of the movable rod 20 and the fixed base 10. The torsion spring 63 can also be another elastic element capable of applying elastic stress to the footrest 30 to provide the footrest 30 with a rotational tendency.

[0044] like Figure 1 As shown, in order to facilitate the installation of the tension spring 21, a connecting hook 201 is provided at the rear end of the movable rod 20, and a connecting screw 101 is screwed on the fixing seat 10, and the two ends of the tension spring 21 are respectively hung on the connecting hook 201 and the connecting screw 101.

[0045] like Figure 4 As shown, the limiting member is a limiting pin 25 installed at the front end of the movable rod 20. The limiting pin 25 is movably installed on the movable rod 20. A spring 24 is provided between the movable rod 20 and the limiting pin 25. The spring 24 is used to push the limiting pin 25 forward so that the limiting pin 25 always maintains a tendency to move forward, thereby enabling the limiting pin 25 to remain in a state of cooperation with the limiting portion on the footrest 30. In the process of the movable rod 20 moving forward, the limiting pin 25 is driven backward by the fixed seat 10, and the spring 24 is compressed, so that the limiting pin 25 is disengaged from the limiting portion on the footrest 30; the spring 24 can also be replaced by other elastic elements such as shrapnel, elastic rubber blocks, etc.

[0046] Specifically, a first slide groove 22 extending in the front-to-back direction is provided at the front end portion of the movable rod 20, a first slider 23 is slidably embedded in the first slide groove 22, a limit pin 25 is fixed on the first slider 23, the limit pin 25 can be integrally formed with the first slider 23, or can be assembled with the first slider 23 by bolts, the two ends of the spring 24 respectively press against the rear end surface of the first slider 23 and the first slide groove 22; a second slide groove 26 extending in the front-to-back direction is provided at the rear end portion of the movable rod 20, A second slider 27 is embedded in the sliding part, and the second slider 27 is connected to the first slider 23 through a connecting piece. During the movement of the movable rod 20 from the first position to the second position relative to the fixed seat 10, the rear end face of the fixed seat 10 limits the second slider 27 to push the second slider 27, so that the second slider 27 moves backward relative to the movable rod 20, thereby pulling the first slider 23 backward relative to the movable rod 20 through the connecting piece, so that the limit pin 25 moves from the state of being combined with the limit part on the footrest 30 to the state of being separated from the limit part.

[0047] In order to avoid interference between the above-mentioned connecting member and the fixing seat 10, a receiving groove 29 is provided on the movable rod 20, and the two ends of the receiving groove 29 are respectively connected to the first slide groove 22 and the second slide groove 26. The connecting member is a pull rope 28 placed inside the receiving groove 29, and the two ends of the pull rope 28 are respectively connected to the first slider 23 and the second slider 27. In other embodiments, the connecting member can also be a connecting rod.

[0048] See also Figure 6 、 Figure 7 and Figure 8 In order to facilitate the pivoting of the movable rod 20 and the footrest 30, a connecting seat 60 is fixed to the front end of the movable rod 20, and a rotating seat 50 is fixed to the footrest 30. The rotating seat 50 is pivotally connected to the connecting seat 60, and the rotating seat 50 can rotate around the axis O, that is, the rotating seat 50 can drive the footrest 30 to swing relative to the connecting seat 60 between the third position and the fourth position around the axis O; a guide hole 622 extending in the front-to-back direction is provided on the connecting seat 60, and the above-mentioned limit pin 25 is inserted into the guide hole 622 from back to front. A recess 501 is provided on the outer edge surface of the rotating seat 50, which is opposite to the guide hole 622. The upper end surface 502 of the recess 501 forms the above-mentioned limiting portion. When the movable rod 20 is in the first position, the limiting pin 25 passes through the guide hole 622 and extends into the recess 501. The limiting pin 25 abuts against the lower end surface 502 of the recess 501, so that the rotating seat 50 cannot rotate in the clockwise direction relative to the connecting seat 60, thereby utilizing the limiting pin 25 and the upper end surface 502 of the recess 501 to form the above-mentioned limiting mechanism.

[0049] like Figure 1 、 Figure 7 and Figure 8 As shown, the connecting seat 60 is installed on the front end of the movable rod 20 by bolts or other fixed connection methods, and the rotating seat 50 is pivotally connected to the connecting seat 60, so that the footrest 30 can swing relative to the movable rod 20, that is, the rotating seat 50 can swing relative to the connecting seat 60 between the third position and the fourth position around the axis O, and the torsion spring 63 is placed between the rotating seat 50 and the connecting seat 60 as an elastic member.

[0050] The connecting seat 60 includes an outer connecting block 62 fixed to the front end of the movable rod 20 and an inner connecting block 61 opposite to the outer connecting block 62. The inner connecting block 61 and the outer connecting block 62 are fixed together by a connecting bolt 64 that passes through the two. A receiving groove is formed between the inner connecting block 61 and the outer connecting block 62. The above-mentioned axis O is the central axis of the connecting bolt 64. The rotating seat 50 is placed in the receiving groove and is pivotally connected to the connecting bolt 64. A mounting groove 52 is provided on the rotating seat 50 at one end facing the inner connecting block 61. A turntable 51 that pivotally cooperates with the rotating seat 50 is embedded in the mounting groove 52. A protrusion 53 is provided in the mounting groove 52. The turntable 51 is provided with an arc-shaped slide groove 511 arranged around the axis O. The protrusion 53 is embedded in the arc-shaped slide groove 511 and can slide between the two end surfaces of the arc-shaped slide groove 511. One end of the torsion spring 63 is plugged and fixed on the inner connecting block 61, and the other end is plugged and fixed on the turntable 51.

[0051] See also Figure 9 As shown, when the footrest 30 is in the third position, the protrusion 53 rests on the end surface 5111 of the arc-shaped slide groove 511, and the torsion spring 63 applies an elastic stress in the clockwise direction a to the turntable 51. When the locking member 70 is operated accordingly, the locking member 70 releases the freedom of the movable rod 20 to move forward, so that the movable rod 20 moves forward to the fourth position, and the fixed seat 10 drives the limiting latch 25 to move backward relative to the movable rod 20 and the connecting seat 60. The limiting latch 25 is separated from the upper end surface 502 of the recess 501, releasing the freedom of the turntable 51 to rotate in the clockwise direction a. Under the action of the elastic stress of the torsion spring 63, the end surface 5111 of the arc-shaped slide groove 511 pushes the protrusion 53 to rotate in the clockwise direction a, and then the rotating seat 50 drives the footrest 30 to rotate from the third position to the fourth position. Figure 10 In the fourth position shown, the footrest 30 is in the highest position, and the curvature of the arc-shaped slide groove 511 is greater than the curvature of the protrusion 53, so that the end surface 5112 of the arc-shaped slide groove 511 is separated from the protrusion 53 by a certain distance, so that the rotating seat 50 can rotate in the counterclockwise direction b within a certain angle range relative to the turntable 51, providing a basis for adjusting the footrest 30 within a certain angle range. In this way, the angle adjustment mechanism provided on the connecting seat 60 can adjust the angle of the footrest 30 within the angle range, so that the support angle of the footrest 30 can meet different usage requirements. For example, an angle adjustment mechanism can be provided inside the outer connecting block 62, and the footrest 30 is as shown in FIG. Figure 10 In the unfolded state shown, the relative angle between the rotating seat 50 and the turntable 51 is adjusted by the angle adjustment mechanism, thereby adjusting the support angle of the support surface of the footrest 30.

[0052] The angle adjustment mechanism is conventional in the art. For example, the angle adjustment mechanism can be a spring pin installed inside the external connecting block 62. During the deployment of the footrest 30, the spring pin does not participate in limiting the rotation angle of the rotating seat 50 and the external connecting block 62. When the footrest 30 is deployed, the rotating seat 50 is adjusted to an appropriate angle within the range defined by the protrusion 53 and the end surface 5112 of the arc-shaped slide 511. The spring pin is used to fix the rotating seat 50 to the external connecting block 62, thereby completing the adjustment of the support angle of the footrest 30. The angle adjustment mechanism can also adopt other conventional technologies in the art, which will not be described in detail here.

[0053] See also Figure 1 、 Figure 3 and Figure 7 As shown, the locking portion is a slot 621 provided on the connecting seat 60, and the fixed seat 10 is connected to the seat. The locking member 70 includes a rotating end 702 and a free end 701. The free end 701 is provided with a hook 703 that matches the slot 621. The rotating end 702 is pivotally connected to the fixed seat 10, so that the locking member 70 can swing up and down relative to the fixed seat 10, that is, the free end 701 of the locking member 70 can swing up and down. When the locking member 70 swings up and down, the hook 703 can be stuck in the slot 621 or the hook 703 can be disengaged from the slot 621. When the hook 703 is stuck in the slot 621, the locking member 70 locks the movable rod 20 with the fixed seat 10. When the hook 703 disengages from the slot 621, the movable rod 20 is no longer locked by the locking member 70, so that the tension spring 21 can pull the movable rod forward. 20. A torsion spring 71 is provided between the locking member 70 and the fixing seat 10 or the seat. The torsion spring 71 is used to apply an elastic stress to the locking member 70 so that the free end 701 of the locking member 70 always maintains a tendency to swing toward the direction of the slot 621. Then, when no external force is applied, the hook 703 of the locking member 70 is stably clamped in the slot 621, so that the locking member 70 can stably lock the movable rod 20 and the fixing seat 10 to prevent the footrest 30 from popping out abnormally. A protruding shift block 704 is provided on the rotating end 702 of the locking member 70. The shift block 704 is used to drive the hook 703 to swing when it is shifted, so that the hook 703 is disengaged from the slot 621. When the footrest 30 needs to be used, the user places the sole of the foot on the locking member 70 and shifts the shift block 704 backward with the heel to make the footrest 30 extend and unfold.

[0054] In the present invention, the locking member 70 is operated, and the movable rod 20 slides forward relative to the fixed seat 10. The movable rod 20 drives the footrest 30 to move forward and extend from under the seat cushion. When the movable rod 20 moves forward, so that the rear end of the movable rod 20 approaches the fixed seat 10, the fixed seat 10 drives the limit latch 25 to disengage from the limit portion on the rotating seat 50. That is to say, when the movable rod 20 starts to move forward, the footrest 30 does not start to rotate because the fixed seat 10 has not yet started to drive the limit latch 25 to move. When the movable rod 20 moves forward and is about to reach the front end position, the limit latch 25 begins to be driven by the fixed seat 10, causing the footrest 30 to start to flip over. The flipping of the footrest 30 lags behind the forward movement of the movable rod 20, thereby preventing the footrest 30 from interfering with other parts of the seat when it automatically pops out, and preventing the footrest 30 from hitting the user.

[0055] In order to improve safety, the present invention adds a damping device to slow down the speed of the movable rod 20 moving forward, thereby increasing the time difference between the movable rod 20 starting to move forward and the footrest 30 starting to flip. For details, see Figure 1 and Figure 5 As shown, the movable rod 20 is provided with a plurality of recessed portions 202 arranged in the front-to-back direction. Adjacent recessed portions 202 are smoothly transitioned through convex arcuate surfaces 203. The plurality of recessed portions 202 and the plurality of arcuate surfaces 203 together form a wavy mating surface. The fixing seat 10 is provided with a mounting hole 12. A pressure block 13 and a spring 14 are movably provided inside the mounting hole 12. The spring 14 is used to apply an elastic stress to the pressure block 13 so that the end face of the pressure block 13 located inside the mounting hole 12 is pressed against the wavy mating surface. When the movable rod 21 is pulled forward by the elastic stress of the tension spring 21, the spring 14, the pressure block 13 and the wavy mating surface cooperate to form a damping structure, slowing down the forward movement of the movable rod 20. The above-mentioned spring 14 can be replaced by other elastic elements such as a spring sheet or an elastic rubber block.

[0056] The movable rod 20 is connected to the fixed base 10. To eliminate the gap between the fixed base 10 and the movable rod 20 and prevent wear, a bushing 11 is provided between the fixed base 10 and the movable rod 20. In the present invention, to improve the support stability of the footrest 30, two rotating bases 50 are provided on the footrest 30. At the same time, two fixed bases 10 and two movable rods 20 are provided. A connecting base 60 is provided at the front end of each movable rod 20. The two rotating bases 50 are respectively pivotally connected to the two connecting bases 60, and a locking member 70 is placed between the two fixed bases 10.

[0057] The seat of the present invention includes the above-mentioned footrest assembly. Other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0058] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by those skilled in the art on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. Footrest assembly, characterized in that: It includes a fixed seat, a movable rod, a footrest, and a locking part; The movable rod is slidably mounted on the fixed seat so that the movable rod can move relative to the fixed seat between a first position and a second position in a front-to-rear direction; a first elastic element is provided between the movable rod and the fixed seat, the first elastic element being used to apply elastic stress to the movable rod so that the movable rod always maintains a tendency to move toward the second position; The footrest is pivotally connected to the front end of the movable rod so that the footrest can swing relative to the movable rod between a third position and a fourth position about an axis extending in the left-right direction. A second elastic element is provided between the footrest and the movable rod, and the second elastic element is used to apply elastic stress to the footrest so that the footrest always maintains a tendency to swing toward the fourth position. The movable rod is provided with a locking portion, and the locking member is movably mounted on the fixed seat so that the locking member can limit the freedom of movement of the movable rod relative to the fixed seat when the locking member is engaged with the locking portion, and can release the limitation on the freedom of movement of the movable rod relative to the fixed seat when the locking member is separated from the locking portion; A limiting portion is provided on the footrest, and a limiting piece is movably configured on the movable rod. When the movable rod is in the first position, the limiting piece is combined with the limiting portion and together form a limiting mechanism that limits the footrest to the third position. When the movable rod is in the second position, the limiting piece is limited by the fixed seat to a state separated from the limiting portion.

2. The footrest assembly according to claim 1, wherein: The limiting member is a limiting latch movably mounted on the front end of the movable rod, and a third elastic element for pushing the limiting latch forward is provided between the movable rod and the limiting latch.

3. The footrest assembly according to claim 2, wherein: The front end portion of the movable rod is provided with a first sliding groove extending along the front-to-back direction, and a first slider is embedded in the first sliding groove for sliding, and the limit pin is fixedly connected to the first slider, and the two ends of the third elastic element respectively press against the rear end surface of the first slider and the first sliding groove; the rear end portion of the movable rod is provided with a second sliding groove extending along the front-to-back direction, and a second slider is embedded in the second sliding groove for sliding, and the second slider is connected to the first slider through a connecting piece. During the process of the movable rod moving from the first position to the second position relative to the fixed seat, the second slider is limited by the fixed seat so that the connecting piece pulls the first slider backward relative to the movable rod, so that the limit pin moves to a state separated from the limiting part of the rotating seat.

4. The footrest assembly according to claim 3, wherein: The movable rod is provided with a receiving groove with two ends respectively connected to the first slide groove and the second slide groove. The connecting member is a pull rope or a connecting rod placed in the receiving groove, and the two ends of the pull rope or the connecting rod are respectively connected to the first slider and the second slider.

5. The footrest assembly according to claim 1, wherein: A connecting seat is fixed to the front end of the movable rod, and a rotating seat is fixed to the footrest. The rotating seat and the connecting seat are pivotally connected so that the rotating seat can swing relative to the connecting seat between a third position and a fourth position around an axis; a guide hole is provided on the connecting seat for inserting a limiting member to guide the limiting member to move in the front-back direction, and a recess is provided on the outer edge surface of the rotating seat facing the guide hole, and the upper end surface of the recess forms a limiting portion. When the movable rod is in the first position, the limiting member is placed in the recess and abuts against the lower end surface of the upper end surface of the recess so that the limiting member and the upper end surface of the recess together form a limiting mechanism; Alternatively, the first elastic element is a tension spring, a connecting hook is provided at the rear end of the movable rod, a connecting screw is threaded on the fixing seat, and both ends of the tension spring are respectively hung on the connecting hook and the connecting screw.

6. The footrest assembly according to claim 1, wherein: A connecting seat is fixed to the front end of the movable rod, and a rotating seat is fixed on the footrest. The rotating seat is pivotally connected to the connecting seat so that the rotating seat can swing relative to the connecting seat around the axis between the third position and the fourth position; the second elastic member is a torsion spring placed between the rotating seat and the connecting seat.

7. The footrest assembly according to claim 6, wherein: The connecting seat includes an outer connecting block fixed at the front end of the movable rod and an inner connecting block opposite to the outer connecting block. The inner connecting block and the outer connecting block are fixed together by a connecting bolt that passes through the two, and a receiving groove is formed between the inner connecting block and the outer connecting block. The axis is the central axis of the connecting bolt. The rotating seat is embedded in the receiving groove and is pivotally connected to the connecting bolt; an installation groove is provided on the rotating seat at one end facing the inner connecting block, and a turntable is embedded in the installation groove to pivot with the rotating seat. A protrusion is provided in the installation groove, and an arc-shaped slide groove arranged around the axis is provided on the turntable. The protrusion is embedded in the arc-shaped slide groove and can slide between the two end surfaces of the arc-shaped slide groove; one end of the torsion spring is plugged and fixed on the inner connecting block, and the other end is plugged and fixed on the turntable.

8. The footrest assembly according to claim 1, wherein: The front end of the movable rod is fixedly connected to the connecting seat, and the locking portion is a slot arranged on the connecting seat; the fixed seat is installed on the seat, and the locking member includes a rotating end and a free end, and the free end has a hook matching the slot, and the rotating end is pivotally connected to the fixed seat so that the locking member can swing up and down relative to the fixed seat, and when the locking member swings up and down, the hook is engaged with the card in the slot or the hook is disengaged from the slot, and a torsion spring is arranged between the locking member and the fixed seat or the seat, and the torsion spring is used to apply elastic stress to the locking member so that the hook always maintains a tendency to swing toward the slot, and a shift block is protruding from the rotating end of the locking member, and the shift block is used to drive the hook to swing when it is shifted so that the hook is disengaged from the slot.

9. The footrest assembly according to claim 1, wherein: The movable rod is provided with a plurality of recessed portions arranged along the front-to-back direction, and adjacent recessed portions are smoothly transitioned through convex arc surfaces. The plurality of recessed portions and the plurality of arc surfaces together form a wavy mating surface. The fixed seat is movably provided with a pressure block and a fourth elastic element. The fourth elastic element is used to apply elastic stress to the pressure block to press the pressure block against the mating surface.

10. A seat, characterized in that The invention comprises the foot support assembly according to any one of claims 1 to 9.

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