Footrest sliding linkage seat frame and multi-functional seat

Abstract

This utility model relates to a sliding footrest linkage seat frame and a multi-functional seat. In the sliding footrest linkage seat frame, the leg rest is hinged to the buttocks component, and the driver is installed on the body. The output end of the driver is connected to the leg rest. The guiding mechanism and the lifting mechanism share a first component. The guiding mechanism also includes a second component fixed to the body and a guiding component rotatably disposed on the second component and connected to the first component. The first component moves when the guiding mechanism deforms and drives the lifting mechanism to move. The lifting mechanism lifts the buttocks component. The buttocks component is fixed relative to the first component when the lifting mechanism moves and moves relative to the first component when the lifting mechanism deforms. The lifting mechanism is hinged to the leg rest. The leg rest is fixed relative to the buttocks component when the lifting mechanism moves and rotates and deforms when the lifting mechanism deforms. The back mechanism includes a back component hinged to the buttocks component and multiple back connecting rods that hinge the back component to the body. The back component swings relative to the buttocks component when the buttocks component moves.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a footrest sliding linkage seat frame and a multifunctional seat. Background Technology

[0002] The multi-functional chair offers three usage positions: sitting, relaxing, and reclining. These positions allow users to sit down, raise their legs to relax, and lie down to rest, respectively. When a user intends to lie down, the chair first extends the leg support to transition from a sitting to a relaxing position, then the backrest reclines to transition from a relaxing to a reclining position. After resting, the chair returns to a relaxed position by first retracting the backrest, and then retracts the leg support to return to a sitting position, allowing the user to get up and leave the chair.

[0003] Some existing multi-functional chairs have a problem with disordered posture transformation. When returning from a lying position to a sitting position, the leg components retract before the back components return to their upright position, and the chair cannot change from a lying position to a sitting position as intended when the product was designed. Utility Model Content

[0004] In view of this, the present invention provides a footrest sliding linkage seat frame and a multi-functional seat that can orderly change from a lying position to a sitting position, so as to overcome the defect of disordered posture change.

[0005] The footrest sliding linkage seat frame of this utility model includes a body, a buttock component, a leg rest, a backrest mechanism, a support mechanism, a guiding mechanism, and a driver. The leg rest is hinged to the front end of the buttock component, the driver is installed on the body, and the output end of the driver is connected to the leg rest.

[0006] The guiding mechanism and the lifting mechanism share the first component. The guiding mechanism also includes a second component fixed to the body and a guiding component rotatably disposed on the second component and connected to the first component.

[0007] When the first component deforms, it moves along the preset forward and backward direction and drives the lifting mechanism to move along the preset forward and backward direction.

[0008] The lifting mechanism supports the buttock component, which is fixed relative to the first component when the lifting mechanism moves and moves relative to the first component along a preset forward and backward direction when the lifting mechanism deforms.

[0009] The lifting mechanism is hinged to the leg support frame. The leg support frame is fixed relative to the hip piece when the lifting mechanism moves in the preset forward and backward direction, and rotates and deforms relative to the hip piece when the lifting mechanism deforms.

[0010] The back mechanism includes a back component hinged to the hip component, and also includes multiple back links that articulate the back component with the fuselage. The back component swings relative to the hip component when the hip component moves.

[0011] The vertical dimension change during deformation of the induction mechanism is greater than that during deformation of the lifting mechanism. When the actuator acts on the leg support, the deformation of the induction mechanism occurs before the deformation of the lifting mechanism.

[0012] In some embodiments, the back link includes a first back link hinged to the rear end of the hip member, a second back link hinged to the back member and the first back link, and a third back link hinged to the bottom end of the first back link and the fuselage; and / or,

[0013] The footrest sliding linkage seat frame also includes an elastic reset component located on the body, which is connected to and acts on the lifting mechanism and / or the guiding mechanism.

[0014] In some embodiments, the first back link includes a swing rod and a side protrusion, the side protrusion being bent and connected to the top of the swing rod, and the third back link is hinged to the bottom of the swing rod. The side protrusion, the swing rod and the third back link are in a Z-shape.

[0015] In some embodiments, the guiding member includes:

[0016] The first link and the second link are hinged to the second component;

[0017] The first reversing arm is hinged to one end of the first connecting rod and the first component;

[0018] The second reversing arm is hinged to the other end of the second link and the first component;

[0019] A fixed-length connecting rod, the two ends of which are respectively hinged to a first connecting rod and a second reversing arm; or, the two ends of the fixed-length connecting rod are respectively hinged to a first reversing arm and a second connecting rod.

[0020] In some embodiments, the two ends of the fixed-length link are not simultaneously hinged to the first link and the second link, and the two ends of the fixed-length link are not simultaneously hinged to the first reversing arm and the second reversing arm.

[0021] In some implementations, the front end of the fixed-length link is hinged to the first link, and the rear end of the fixed-length link is hinged to the second reversing arm.

[0022] In some embodiments, the two ends of the second reversing arm are respectively hinged to the first member and the second connecting rod, and the hinge point between the fixed-length connecting rod and the second reversing arm is located between the two ends of the second reversing arm; and / or,

[0023] The guiding member also includes a third member hinged to the first link and the second link. The two ends of the second link are respectively hinged to the second member and the third member. The hinge point between the second reversing arm and the second link is located between the two ends of the second link. The third member and the second member are respectively hinged to the two ends of the first link. The hinge point between the fixed-length link and the first link is located behind the line connecting the two ends of the first link.

[0024] In some embodiments, the front end of the first member is hinged to the end of the first reversing arm that is relatively close to the ground, and the rear end of the first member is hinged to the end of the second reversing arm that is relatively close to the ground; and / or,

[0025] The lifting mechanism also includes a third link and a fourth link. The two ends of the third link are respectively hinged to the front end of the first component and the front force-bearing point of the hip component, and the two ends of the fourth link are respectively hinged to the rear end of the first component and the rear force-bearing point of the hip component.

[0026] In some embodiments, the lifting mechanism further includes a force transmission link, one end of which is hinged to the leg support frame, and the other end of which is hinged to any one of a third link, a first member, or a fourth link.

[0027] The multifunctional seat of this utility model includes the above-mentioned footrest sliding linkage seat frame.

[0028] Compared with the prior art, the footrest sliding linkage seat frame of this utility model can switch from a reclining position to a sitting position in an orderly and reasonable manner according to the preset posture sequence. When the drive applies a pulling force to the leg rest when the footrest sliding linkage seat frame is in a reclining position, the induction mechanism deforms before the support mechanism deforms, the support mechanism moves first and then deforms, and the backrest mechanism resets and stands upright before the leg rest retracts, thereby ensuring that the footrest sliding linkage seat frame first switches from a reclining position to a correct leisure position, and then retracts the leg rest to switch from a leisure position to a reclining position.

[0029] When the footrest sliding linkage seat frame, which is in a reclining position, attempts to return to a sitting position, the actuator applies a pulling force to the leg rest. The support mechanism, leg rest, and hip support receive a retraction acceleration, which includes a vertical downward vector and a horizontal backward vector. Due to the effects of gravity and human body pressure on the footrest sliding linkage seat frame, and based on the principle of minimum energy, the retraction acceleration causes the guiding mechanism to deform preferentially. This retraction acceleration causes the support mechanism, hip support, and leg rest to move backward and downward as a whole along with the deformation of the guiding mechanism. Therefore, the retraction process of the footrest sliding linkage seat frame from a reclining position to a sitting position is divided into a first stage and a second stage:

[0030] In the first stage, the induction mechanism deforms and the lifting mechanism translates. The leg support moves backward and downward with the hip piece. The leg support is fixed relative to the hip piece. The back link moves with the hip piece and drives the back component to rotate relative to the hip piece, thereby switching the back component from a backward tilted state to an upright state.

[0031] In the second stage, the deformation of the induction mechanism ends, the movement of the lifting mechanism ends, the driver continues to act on the leg frame, the mechanical interaction between the leg frame, the hip piece and the lifting mechanism changes, the lifting mechanism begins to deform, the leg frame rotates relative to the hip piece as the lifting mechanism deforms, at the same time the leg frame itself deforms and the center of gravity drops, the leg frame switches from the extended state to the retracted state. Attached Figure Description

[0032] Figure 1 This is a first schematic diagram of the footrest sliding linkage seat frame in a sitting posture according to one embodiment of the present invention.

[0033] Figure 2 This is a second schematic diagram of the footrest sliding linkage seat frame in a sitting posture, according to one embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the footrest sliding linkage seat frame in a transition posture according to one embodiment of the present invention.

[0035] Figure 4 This is a first schematic diagram of a footrest sliding linkage seat frame in a leisure posture, according to one embodiment of the present invention.

[0036] Figure 5 This is a second schematic diagram of a footrest sliding linkage seat frame in a leisure posture, according to one embodiment of the present invention.

[0037] Figure 6 This is a first schematic diagram of the footrest sliding linkage seat frame in a reclining position according to one embodiment of the present invention.

[0038] Figure 7 This is a second schematic diagram of the footrest sliding linkage seat frame in a reclining position, according to one embodiment of the present invention.

[0039] Figure 8 This is a partial structural diagram of a footrest sliding linkage seat frame in a reclining position, according to one embodiment of the present invention.

[0040] Figure 9 A partial structural schematic diagram of the guiding mechanism of the footrest sliding linkage seat frame according to one embodiment of the present utility model when the footrest sliding linkage seat frame is in a reclining position.

[0041] Figure 10 A schematic diagram of the connection relationship of the guiding mechanism of the footrest sliding linkage seat frame in one embodiment of the present invention when the footrest sliding linkage seat frame is in a reclining position.

[0042] Figure 11This is a partial enlarged view of a footrest sliding linkage seat frame in a leisure posture, according to one embodiment of the present invention.

[0043] Figure 12 An analytical diagram of the motion of the guiding mechanism of the footrest sliding linkage seat frame, which is one embodiment of the present invention, when the footrest sliding linkage seat frame switches from a reclining position to a leisure position.

[0044] Figure 13 This is a diagram illustrating the action of the guiding mechanism of the footrest sliding linkage seat frame in one embodiment of the present invention when the footrest sliding linkage seat frame switches from a reclining position to a leisure position.

[0045] Figure 14 This is a schematic diagram of the backrest mechanism of a footrest sliding linkage seat frame according to one embodiment of the present invention.

[0046] Figure 15 This is a three-dimensional schematic diagram of a footrest sliding linkage seat frame in a leisure posture, according to one embodiment of the present invention.

[0047] Figure 16 This is a three-dimensional schematic diagram of a footrest sliding linkage seat frame in a reclining position, according to one embodiment of the present invention.

[0048] Explanation of reference numerals in the attached drawings: 10. Fuselage; 20. Hip section; 21. Front force point; 22. Rear force point; 30. Leg support; 40. Backrest mechanism; 41. Backrest component; 42. First backrest link; 421. Swinging rod; 422. Side protrusion; 43. Second backrest link; 44. Third backrest link; 50. Driver; 51. Push rod; 52. Motor body; 60. Lifting mechanism; 61. Third link; 62. Fourth link; 63. Force transmission link; 70. Guiding mechanism; 71. First component; 72. Second component; 731. First link; 732. Second link; 74. Third component; 75. First reversing arm; 76. Second reversing arm; 77. Fixed-length link; 80. Elastic reset component. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] This utility model provides a sliding footrest chair frame and a multifunctional chair including the sliding footrest chair frame. The sliding footrest chair frame can provide three positions: sitting, relaxing, and reclining. The sitting position allows the user to sit with knees bent and torso upright; the relaxing position allows the user to sit with legs straight and torso upright; and the reclining position allows the user to lie down with legs straight and torso reclined. When the sliding footrest chair frame is in the sitting position... Figures 1-2 As shown, when in a relaxed posture, such as Figures 4-5 , Figure 15 As shown, when in a lying position Figures 6-7 , Figure 16 As shown.

[0052] In some embodiments, the footrest sliding linkage seat frame also includes a transitional posture between a sitting posture and a relaxed posture. When the footrest sliding linkage seat frame is in the transitional posture, such as... Figure 3 As shown, the transition posture allows the user to sit with knees bent and torso upright. Compared to the sitting position, the knee bend angle is smaller in the transition posture, and the user's feet are higher off the ground.

[0053] See Figures 7-8 This utility model discloses a sliding, linked seat frame with footrests, comprising a body 10, a hip support 20, a leg rest 30, a backrest mechanism 40, and a driver 50. The body 10 is placed on the ground. The driver 50 is mounted on the body 10. The leg rest 30 is hinged to the front end of the hip support 20. While rotating relative to the hip support 20, the leg rest 30 itself deforms, switching between extended and retracted states through its deformation. The output end of the driver 50 is connected to the leg rest 30. The backrest mechanism 40 includes a back component 41 hinged to the hip support 20, and multiple back connecting rods that hinge the back component 41 to the body 10. When the relative position of the hip support 20 and the body 10 changes, the shape and force on the back connecting rods change, thereby causing the back component 41 to rotate relative to the hip support 20. The back component 41 switches between an upright and reclining state through rotation. When a user sits on the hip support 20, the front and rear ends of the hip support 20 are located in front of and behind the user, respectively.

[0054] The hip support 20 supports the user's hips and thighs. The back support 41 supports the user's lower back; when the footrest sliding linkage seat frame is in a sitting, transitional, or relaxed position, the back support 41 is upright; when the footrest sliding linkage seat frame is in a reclining position, the back support 41 is reclined. The leg rest 30 supports the user's legs and feet; when the footrest sliding linkage seat frame is in a sitting position, the leg rest 30 is fully retracted; when the footrest sliding linkage seat frame is in a transitional position, the leg rest 30 is partially retracted and partially extended; when the footrest sliding linkage seat frame is in a relaxed or reclining position, the leg rest 30 is fully extended. The actuator 50 serves as the power source for changing the posture of the footrest sliding linkage seat frame.

[0055] When the footrest sliding linkage seat frame is in a sitting position, the actuator 50 applies a push to the leg rest 30, causing the leg rest 30 to rotate relative to the buttocks member 20 and switch from a fully retracted state to a semi-retracted and semi-extended state. At the same time, the buttocks member 20 moves forward and slightly downward, so the footrest sliding linkage seat frame switches to a transitional posture. Then, the actuator 50 continues to drive the leg rest 30 to rotate relative to the buttocks member 20 and switch from a semi-retracted and semi-extended state to a fully extended state. The buttocks member 20 continues to move forward, so the footrest sliding linkage seat frame switches to a relaxed posture. Then, the actuator 50 continues to apply a push to the leg rest 30, thereby driving the buttocks member 20 and the leg rest 30 to move forward and slightly upward as a whole, so that the backrest member 41 is driven to switch from an upright state to a reclining state. Finally, the footrest sliding linkage seat frame switches to a lying position.

[0056] When the footrest sliding linkage seat frame is in a reclining position, the actuator 50 applies a pulling force to the leg rest 30, causing the leg rest 30 and the buttocks component 20 to move backward and slightly downward as a whole. The back component 41 is moved and switches from a reclining state to an upright state, thus the footrest sliding linkage seat frame switches to a relaxed position. Then, the actuator 50 continues to apply a pulling force to the leg rest 30, causing the leg rest 30 to rotate relative to the buttocks component 20 and switch from a fully extended state to a semi-folded and semi-extended state. At the same time, the buttocks component 20 moves backward, thus the footrest sliding linkage seat frame switches to a transitional position. Then, the actuator 50 continues to apply a pulling force to the leg rest 30, causing the leg rest 30 to rotate relative to the buttocks component 20 and switch from a semi-folded and semi-extended state to a fully folded state. At the same time, the buttocks component 20 moves backward and slightly upward, and finally the footrest sliding linkage seat frame returns to the sitting position. Regardless of the posture of the footrest sliding linkage seat frame, the shelf set on the leg rest 30 is always horizontal, and the side of the shelf that directly contacts the legs and feet is always horizontal and facing away from the ground.

[0057] Specifically, see Figures 4-5The driver 50 is a push rod motor, including a motor body 52 and a push rod 51 that can extend and retract relative to the motor body 52. ​​The motor body 52 is rotatably connected to the body 10. One end of the push rod 51 extends into the motor body 52, and the other end extends out of the motor body 52 and is hinged to the leg holder 30. The push rod motor applies a pushing force to the leg holder 30 by increasing the length of the push rod 51 extending out of the motor body 52, and applies a pulling force to the leg holder 30 by decreasing the length of the push rod 51 extending out of the motor body 52. ​​The end of the push rod 51 connected to the leg holder 30 is higher than the end of the push rod 51 extending into the motor body 52. ​​The push rod 51 is approximately parallel to the length direction of the hip member 20. The pushing force includes a forward horizontal vector and a vertical vector away from the ground, and the pulling force includes a backward horizontal vector and a vertical vector close to the ground.

[0058] The footrest sliding linkage seat frame of this utility model also includes a support mechanism 60 and a guiding mechanism 70, see reference. Figure 9 and Figure 11 The lifting mechanism 60 and the guiding mechanism 70 share the first component 71. The lifting mechanism 60 also includes a third link 61 and a fourth link 62. The hip member 20 has a front force point 21 and a rear force point 22. The front force point 21 is closer to the front end of the hip member 20, and the rear force point 22 is closer to the rear end of the hip member 20. The end of the third link 61 away from the ground is hinged to the front force point 21, and the end of the fourth link 62 away from the ground is hinged to the rear force point 22. The front end of the first component 71 is hinged to the end of the third link 61 near the ground, and the rear end of the first component 71 is hinged to the end of the fourth link 62 near the ground. (See reference...) Figure 8 The hinge point between the third link 61 and the front force point 21 is represented by O, the hinge point between the fourth link 62 and the rear force point 22 is represented by q, the hinge point between the third link 61 and the first component 71 is represented by p, and the hinge point between the fourth link 62 and the first component 71 is represented by r. The hip component 20, the third link 61, the fourth link 62 and the first component 71 form a four-bar linkage.

[0059] The lifting mechanism 60 also includes a force transmission link 63, the two ends of which are hinged to the leg support 30 and the lifting mechanism 60, respectively. (See reference...) Figures 2-3 , Figures 7-8 The front end of the force transmission link 63 is hinged to the leg support 30, and the rear end of the force transmission link 63 is hinged to the fourth link 62. The hinge point between the force transmission link 63 and the leg support 30 is at... Figure 8 In the diagram, n represents the hinge point between the force transmission link 63 and the fourth link 62. Figure 8The symbol 's' represents the joint. A hinge point 'k' connects the leg support 30 and the hip joint 20. Points 'k', 'q', 's', and 'n' form a quadrilateral. The hip joint 20, leg support 30, fourth link 62, and force transmission link 63 form a four-bar linkage, represented by the quadrilateral formed by connecting points 'k', 'q', 's', and 'n'. The rear end of the force transmission link 63 can also be hinged to the third link 61 or the first component 71.

[0060] The force transmission link 63 is used to connect the leg rest 30 and the support mechanism 60 in terms of force. When the footrest sliding linkage seat frame is in a reclining position, if the actuator 50 applies a pulling force to the leg rest 30, the pulling force is transmitted from the leg rest 30 to the support mechanism 60 through the force transmission link 63. The support mechanism 60 thus indirectly receives the pulling force from the actuator 50. As a result, the support mechanism 60 and the leg rest 30 simultaneously obtain a retraction acceleration, which includes a vertical downward vector and a horizontal backward vector. This retraction acceleration causes the buttock piece 20, the leg rest 30, and the support mechanism 60 to move backward and drop slightly as a whole, thus switching the footrest sliding linkage seat frame to a relaxed position. When the footrest sliding linkage seat frame is in a relaxed posture, if the driver 50 applies a pushing force to the leg rest 30, the pushing force is transmitted from the leg rest 30 to the lifting mechanism 60 through the force transmission link 63. The lifting mechanism 60 is thus indirectly pushed forward by the driver 50. As a result, the lifting mechanism 60 and the leg rest 30 simultaneously obtain forward acceleration, which includes a vertical upward vector and a horizontal forward vector. This forward acceleration causes the buttock piece 20, the leg rest 30 and the lifting mechanism 60 to move forward as a whole and rise slightly, and the footrest sliding linkage seat frame switches to a reclining posture.

[0061] In addition to the first component 71 shared with the lifting mechanism 60, the guiding mechanism 70 also includes a second component 72 and a guiding component. The guiding component is rotatably disposed on the second component 72 and connected to the first component 71. The lifting mechanism 60 lifts the hip member 20 on the side of the first component 71 away from the ground via a third link 61 and a fourth link 62. When the guiding mechanism 70 deforms, the first component 71 moves along a preset forward and backward direction, driving the lifting mechanism 60 to move along the preset forward and backward direction. When the lifting mechanism 60 moves along the preset forward and backward direction, the hip member 20 is fixed relative to the first component 71, and when the lifting mechanism 60 deforms, the hip member 20 moves relative to the first component 71 along the preset forward and backward direction. The leg rest 30 is fixed relative to the hip member 20 when the lifting mechanism 60 moves along a preset forward and backward direction. The leg rest 30 rotates and deforms relative to the hip member 20 when the lifting mechanism 60 deforms. The deformation of the leg rest 30 includes retracting and extending the leg rest 30. The back member 41 swings relative to the hip member 20 when the hip member 20 moves along a preset forward and backward direction. The vertical dimension change of the guiding mechanism 70 during deformation is greater than that of the lifting mechanism 60 during deformation. The vertical dimension change refers to the change in the total vertical dimension of both the guiding mechanism 70 and the lifting mechanism 60 during deformation. When the guiding mechanism 70 deforms, the sum of the changes in gravitational potential energy of the hip piece 20, the leg support 30, the lifting mechanism 60, and the guiding mechanism 70 is denoted as GM1. When the lifting mechanism 60 deforms, the sum of the changes in gravitational potential energy of the hip piece 20, the leg support 30, and the lifting mechanism 60 is denoted as GM2. GM1 > GM2. According to the principle of minimum energy, it can be determined that the pulling force of the driver 50 on the leg support 30 causes the guiding mechanism 70 to deform before the lifting mechanism 60. That is, the retraction acceleration causes the lifting mechanism 60, the hip piece 20, and the leg support 30 to move slightly downward as the guiding mechanism 70 deforms.

[0062] The preset forward and backward direction is tilted at an angle θ relative to the horizontal direction. The first component 71 and the hip component 20 are also similarly tilted at an angle θ relative to the horizontal plane. For example... Figure 3 , Figure 5 , Figures 7-9 As shown, the front end of the first component 71 is higher than the rear end of the first component 71; as Figures 1 to 8 As shown, the front end of the buttock member 20 is higher than the rear end of the buttock member 20. Optionally, the length direction of the first member 71 is the same as the preset forward and backward direction, and the length direction of the buttock member 20 is the same as the preset forward and backward direction.

[0063] Specifically, the guiding component includes a first link 731, a second link 732, a third component 74, a first reversing arm 75, a second reversing arm 76, and a fixed-length link 77. The second component 72, the first link 731, the second link 732, and the third component 74 form a guiding quadrilateral. (See also...) Figure 9The second component 72 is fixedly mounted on the fuselage 10. The end of the first connecting rod 731 closest to the ground is hinged to the front end of the second component 72, and the end of the first connecting rod 731 furthest from the ground is hinged to the front end of the third component 74. The end of the second connecting rod 732 closest to the ground is hinged to the rear of the front end of the second component 72, and the end of the second connecting rod 732 furthest from the ground is hinged to the rear end of the third component 74. The first reversing arm 75 is hinged to the front end of the first component 71 and the first connecting rod 731, and the second reversing arm 76 is hinged to the rear end of the first component 71 and the second connecting rod 732. The fixed-length connecting rod 77 has two connection methods, one of which is as follows: Figure 9 As shown, the two ends of the fixed-length connecting rod 77 are respectively hinged to the first connecting rod 731 and the second reversing arm 76. Another connection method is that the two ends of the fixed-length connecting rod 77 are respectively hinged to the first reversing arm 75 and the second connecting rod 732.

[0064] like Figure 10 As shown, the hinge point between the second component 72 and the first connecting rod 731 is denoted by A, the hinge point between the second component 72 and the second connecting rod 732 is denoted by B, the hinge point between the second connecting rod 732 and the third component 74 is denoted by C, and the hinge point between the first connecting rod 731 and the third component 74 is denoted by D. The first connecting rod 731 and the second connecting rod 732 rotate in the same direction relative to the second component 72. Figure 9 The diagram illustrates the guiding mechanism 70 of the sliding joint seat frame with footrest, viewed from the side in a reclining position. When the actuator 50 applies a pulling force to the leg rest 30, the first link 731 rotates... Figure 10 The hinge point A shown rotates clockwise, and the second link 732 rotates around... Figure 10 When hinge point B is rotated clockwise, the first link 731 and the second link 732 rotate clockwise until the induced quadrilateral switches to... Figure 11 The state shown.

[0065] Optionally, see Figures 9-10 In some embodiments, the front end of the fixed-length link 77 is hinged to the first link 731, and the rear end of the fixed-length link 77 is hinged to the second reversing arm 76. The hinge point between the first link 731 and the first reversing arm 75 is denoted by E, the hinge point between the second link 732 and the second reversing arm 76 is denoted by G, the hinge point between the first member 71 and the first reversing arm 75 is denoted by F, the hinge point between the first member 71 and the second reversing arm 76 is denoted by H, the hinge point between the fixed-length link 77 and the first link 731 is denoted by J, and the hinge point between the fixed-length link 77 and the second reversing arm 76 is denoted by K. Figure 10 In the diagram, points A, E, D, and J all belong to the first link 731; points B, G, and C all belong to the second link 732; and points H, K, and G all belong to the second reversing arm 76. Figure 8 and Figure 10Points H, F, p, and r all belong to the first component 71.

[0066] In other embodiments, the front end of the fixed-length link 77 is hinged to the first reversing arm 75, and the rear end of the fixed-length link 77 is hinged to the second link 732. This is only necessary as long as the two ends of the fixed-length link 77 are not simultaneously hinged to the first link 731 and the second link 732, and the two ends of the fixed-length link 77 are not simultaneously hinged to the first reversing arm 75 and the second reversing arm 76.

[0067] Specifically, see Figures 9-11 The two ends of the first link 731 are respectively hinged to the front end of the second component 72 and the front end of the third component 74. The hinge point between the first reversing arm 75 and the first link 731 is located between the two ends of the first link 731. The front end of the fixed-length link 77 is hinged to the first link 731 at point J, which is located behind the line connecting the two ends of the first link 731, i.e., behind the line connecting points A and D. The two ends of the second reversing arm 76 are respectively hinged to the rear of the front end of the first component 71 and the second link 732. The hinge point between the rear end of the fixed-length link 77 and the second reversing arm 76 is located between the two ends of the second reversing arm 76. The two ends of the second link 732 are respectively hinged to the rear end of the third component 74 and the second component 72. The hinge point between the second reversing arm 76 and the second link 732 is located between the two ends of the second link 732.

[0068] In some embodiments, the footrest sliding linkage seat frame further includes an elastic reset member 80 disposed on the body 10, the elastic reset member 80 being connected to and elastically acting on at least one of the lifting mechanism 60 and the guiding mechanism 70. See also Figures 1-3 , Figure 5 The elastic reset element 80 is a telescopic spring, with its rear end connected to the body 10 and its front end connected to the first component 71. In other embodiments, the front end of the telescopic spring may also be connected to a third link 61 or a fourth link 62. It should be noted that the elastic reset element 80 is not strictly necessary.

[0069] Further, see Figures 1 to 7 , Figure 14 The backrest linkage includes a first backrest linkage 42 hinged to the rear end of the hip joint 20, a second backrest linkage 43 hinged to the backrest component 41 and the first backrest linkage 42, and a third backrest linkage 44 hinged to the bottom end of the first backrest linkage 42 and the body 10. The backrest component 41 rotates relative to the hip joint 20 to switch between an upright position and a reclining position. The backrest component 41 corresponds to the upright position when the footrest sliding linkage seat frame is in a sitting or relaxing position, and corresponds to the reclining position when the footrest sliding linkage seat frame is in a lying position. When the backrest component 41 switches from the upright position to the reclining position, the angle between the backrest component 41 and the hip joint 20 increases.

[0070] Specifically, such as Figure 14 As shown, the first back link 42 includes a swing rod 421 and a side protrusion 422. The side protrusion 422 is bent and connected to the top of the swing rod 421. The third back link 44 is hinged to the bottom of the swing rod 421. The side protrusion 422, the swing rod 421 and the third back link 44 are in a Z-shape.

[0071] Optionally, see Figures 1 to 8 In the lifting mechanism 60, the structure and relative positional relationship of the third link 61, the fourth link 62, the front force point 21, and the rear force point 22 satisfy that the first component 71 extends approximately along the length direction of the hip member 20, so that the first component 71 and the hip member 20 are approximately parallel, with the front end of the hip member 20 slightly higher than the rear end, and the front end of the first component 71 slightly higher than the rear end; furthermore, combined with Figures 9-10 The line connecting points A and B is configured to be approximately parallel to the length direction of the hip piece 20, and the vertical height of point A is slightly higher than the vertical height of point B; the distance between the two ends of the first link 731 and the distance between the two ends of the second link 732 are basically equal, and the distance between points C and D is approximately equal to the distance between points A and B; the connection position between the motor body 52 and the body 10 and the connection position between the push rod 51 and the leg holder 30 meet the requirement that the driver 50 exerts a pushing and pulling force on the leg holder 30 approximately along the length direction of the hip piece 20, that is, the push rod 51 extends and retracts approximately along the length direction of the hip piece 20 into the motor body 52.

[0072] This utility model's footrest sliding linkage seat frame can switch postures in an orderly and reasonable manner according to a preset posture sequence. When the driver 50 applies a pulling force to the leg rest 30, the backrest mechanism 40 returns to the upright position before the leg rest 30 returns to the folded position, thus avoiding the erroneous posture change sequence where the leg rest 30 folds first and then the backrest mechanism 40 returns to the upright position. The return process from a reclining to a sitting position using the footrest sliding linkage seat frame is divided into a first stage and a second stage:

[0073] In the first stage, the induction mechanism 70 deforms and the lifting mechanism 60 translates. The leg support 30 moves backward and downward following the hip piece 20. The leg support 30 is fixed relative to the hip piece 20. The back link moves with the hip piece 20 and drives the back component 41 to rotate relative to the hip piece, thereby switching the back component 41 from a backward tilted state to an upright state.

[0074] In the second stage, the deformation of the induction mechanism 70 ends, the movement of the lifting mechanism 60 ends, and the driver 50 continues to act on the leg support 30. The mechanical interaction between the leg support 30, the hip piece 20 and the lifting mechanism 60 changes. The lifting mechanism 60 begins to deform, and the leg support 30 rotates relative to the hip piece 20 as the lifting mechanism 60 deforms. At the same time, the leg support 30 itself deforms and its center of gravity drops, and the leg support 30 switches from the extended state to the retracted state.

[0075] by Figures 1 to 11 Taking the footrest sliding linkage seat frame shown as an example, when a user attempts to switch the footrest sliding linkage seat frame from a reclining position to a relaxed position, the actuator 50 applies a pulling force to the legs. The support mechanism 60, leg rest 30, and hip member 20 gain a retraction acceleration. The first component 71, shared by the support mechanism 60 and the induction mechanism 70, induces the induction quadrilateral to retract due to the obtained retraction acceleration. The retraction deformation includes the first link 731 resetting and swinging relative to the second component 72, the second link 732 resetting and swinging relative to the second component 72, and the third component 74 moving relative to the second component 72. Figure 6 and Figure 4 Both the first link 731 and the second link 732 rotate clockwise to return to their original position relative to the second component 72. Since the length of the fixed-length link 77 is fixed, the first reversing arm 75 and the second reversing arm 76 rotate counterclockwise relative to the first link 731 and the second link 732, respectively, under the constraint of the fixed-length link 77. That is, the first reversing arm 75 rotates around... Figure 10 Point E, as shown, rotates counterclockwise relative to the first link 731, and the second reversing arm 76 rotates around... Figure 10Point G rotates counterclockwise relative to the second link 732. As a result, the first component 71 is driven by the first reversing arm 75 and the second reversing arm 76 and moves backward relative to the second component 72. The first component 71 moves backward basically along the length of the hip component 20. Therefore, during the transition from a lying position to a relaxed position, the support mechanism 60 hardly deforms. Instead, it moves backward as a whole and synchronously with the hip component 20 and the leg rest 30 until the relaxed position is reached. During this period, the back mechanism 40 is driven by the hip component 20 to return from the reclining position to the upright position. Before the back mechanism 40 returns to the upright position, the leg rest 30 does not deform and only moves backward synchronously with the hip component 20. Therefore, the leg rest 30 will not retract before the back mechanism 40 returns to its original position. When the footrest sliding linkage seat frame switches to the leisure posture, if the actuator 50 continues to apply tension to the leg rest 30, the leg rest 30 will then rotate relative to the buttock member 20 and undergo a retracting deformation. The rearward movement of the support mechanism 60 will essentially stop. The support mechanism 60 will undergo folding deformation during the transition from the leisure posture to the sitting posture. The elastic reset member 80 exerts a pulling force on the support mechanism 60 and / or the induction mechanism 70. This pulling force enables the first member 71 to obtain a retraction acceleration, thereby helping to induce the quadrilateral to retract after activation. In other embodiments, the elastic reset member 80 can be omitted.

[0076] Figure 12 This illustration shows the relative positional relationships of the hinge points in the guiding mechanism 70 of the footrest sliding linkage seat frame according to one embodiment of the present invention in the reclining state and the leisure state. As mentioned above, points A, E, D, and J are relatively fixed and belong to the first link 731; points B, G, and C are relatively fixed and belong to the second link 732; and points H, K, and G are relatively fixed and belong to the second reversing arm 76. Figure 12 It can be seen that the first component 71 (both points H and F belong to the first component 71) moves backward in a direction that is basically parallel to the direction of the line connecting points A and B.

[0077] Figure 13 This illustration shows the guiding mechanism 70 of a footrest sliding linkage seat frame according to one embodiment of the present invention, during the process of switching the footrest sliding linkage seat frame from a reclining position to a relaxed position. Figure S1 shows the form of the guiding mechanism 70 when the footrest sliding linkage seat frame is in the reclining position, and Figure S6 shows the form of the guiding mechanism 70 when the footrest sliding linkage seat frame is in the relaxed position. The blue component in the figures is the first component 71.

[0078] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A footrest translation linkage seat frame characterized by, It includes a body (10), a hip joint (20), a leg support (30), a back mechanism (40), a lifting mechanism (60), a guiding mechanism (70), and a driver (50). The leg support (30) is hinged to the front end of the hip joint (20), and the driver (50) is mounted on the body (10). The output end of the driver (50) is connected to the leg support (30). The guiding mechanism (70) shares a first component (71) with the lifting mechanism (60). The guiding mechanism (70) also includes a second component (72) fixed to the body (10) and a guiding component rotatably disposed on the second component (72) and connected to the first component (71). When the guiding mechanism (70) deforms, the first component (71) moves along a preset forward and backward direction and drives the lifting mechanism (60) to move along the preset forward and backward direction; The lifting mechanism (60) lifts the buttock component (20), and the buttock component (20) is fixed relative to the first component (71) when the lifting mechanism (60) moves, and moves relative to the first component (71) along the preset forward and backward direction when the lifting mechanism (60) deforms. The lifting mechanism (60) is hinged to the leg support (30). The leg support (30) is fixed relative to the hip piece (20) when the lifting mechanism (60) moves along the preset forward and backward direction, and rotates and deforms relative to the hip piece (20) when the lifting mechanism (60) deforms. The back mechanism (40) includes a back component (41) hinged to the hip component (20), and also includes a plurality of back links that connect the back component (41) to the body (10) and the back component (41) swinging relative to the hip component (20) when the hip component (20) moves. The vertical dimension change of the guiding mechanism (70) during deformation is greater than that of the lifting mechanism (60) during deformation. When the driver (50) acts on the leg support (30), the deformation of the guiding mechanism (70) occurs before the deformation of the lifting mechanism (60).

2. The footrest translating link chair frame of claim 1 wherein, The back link includes a first back link (42) hinged to the rear end of the hip piece (20), a second back link (43) hinged to the back piece (41) and the first back link (42), and a third back link (44) hinged to the bottom end of the first back link (42) and the fuselage (10); and / or, The footrest sliding linkage seat frame also includes an elastic reset member (80) disposed on the body (10), the elastic reset member (80) being connected to and acting on the lifting mechanism (60) and / or the guiding mechanism (70).

3. The footrest translating link chair frame of claim 2 wherein, The first back link (42) includes a swing rod (421) and a side protrusion (422). The side protrusion (422) is bent and connected to the top of the swing rod (421). The third back link (44) is hinged to the bottom of the swing rod (421). The side protrusion (422), the swing rod (421) and the third back link (44) are in a Z-shape.

4. The footrest translation linkage seat frame of claim 1, wherein, The guiding component includes: The first link (731) and the second link (732) are hinged to the second member (72); The first reversing arm (75) is hinged to one end of the first connecting rod (731) and the first component (71); The second reversing arm (76) is hinged to the other end of the second link (732) and the first member (71); A fixed-length connecting rod (77) is provided, with its two ends hinged to the first connecting rod (731) and the second reversing arm (76), respectively; or, the two ends of the fixed-length connecting rod (77) are hinged to the first reversing arm (75) and the second connecting rod (732), respectively.

5. The footrest sliding linkage seat frame as described in claim 4, characterized in that, The two ends of the fixed-length connecting rod (77) are not simultaneously hinged to the first connecting rod (731) and the second connecting rod (732), and the two ends of the fixed-length connecting rod (77) are not simultaneously hinged to the first reversing arm (75) and the second reversing arm (76).

6. The footrest sliding linkage seat frame as described in claim 5, characterized in that, The front end of the fixed-length connecting rod (77) is hinged to the first connecting rod (731), and the rear end of the fixed-length connecting rod (77) is hinged to the second reversing arm (76).

7. The footrest sliding linkage seat frame as described in claim 6, characterized in that, The two ends of the second reversing arm (76) are respectively hinged to the first component (71) and the second connecting rod (732), and the hinge point between the fixed-length connecting rod (77) and the second reversing arm (76) is located between the two ends of the second reversing arm (76); and / or, The guiding component further includes a third component (74) hinged to the first link (731) and the second link (732). The two ends of the second link (732) are respectively hinged to the second component (72) and the third component (74). The hinge point between the second reversing arm (76) and the second link (732) is located between the two ends of the second link (732). The third component (74) and the second component (72) are respectively hinged to the two ends of the first link (731). The hinge point between the fixed-length link (77) and the first link (731) is located behind the line connecting the two ends of the first link (731).

8. The footrest sliding linkage seat frame as described in any one of claims 4 to 7, characterized in that, The front end of the first component (71) is hinged to the end of the first reversing arm (75) that is relatively close to the ground, and the rear end of the first component (71) is hinged to the end of the second reversing arm (76) that is relatively close to the ground; and / or, The lifting mechanism (60) further includes a third link (61) and a fourth link (62). The two ends of the third link (61) are respectively hinged to the front end of the first component (71) and the front force point (21) of the hip component (20). The two ends of the fourth link (62) are respectively hinged to the rear end of the first component (71) and the rear force point (22) of the hip component (20).

9. The footrest sliding linkage seat frame as described in claim 8, characterized in that, The lifting mechanism (60) further includes a force transmission link (63), one end of which is hinged to the leg support frame (30), and the other end is hinged to any one of the third link (61), the first component (71), or the fourth link (62).

10. A multifunctional seat, characterized in that, Including the footrest sliding linkage seat frame as described in any one of claims 1 to 9.

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