Foot support stretching mechanism and seat with same

Abstract

The utility model discloses a foot support stretching mechanism and a seat with the foot support stretching mechanism. The foot support stretching mechanism is used for the seat and comprises a foot support component and a stretching component, the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, and one end of the first connecting rod and one end of the second connecting rod are rotationally connected with the base and are spaced in the front-back direction; one end of the third connecting rod and one end of the fourth connecting rod are both rotationally connected with the foot support component and are spaced in the width direction of the foot support component, and the ends, away from the foot support component, of the third connecting rod and the fourth connecting rod are rotationally connected with the ends, away from the base, of the first connecting rod and the second connecting rod correspondingly. The middle area of the fourth connecting rod is rotationally connected with the middle area of the first connecting rod; the driving assembly is used for driving the first connecting rod to rotate relative to the base. According to the foot support stretching mechanism, a large stretching distance can be achieved when the foot support component needs to be used, occupied space is saved when the foot support component does not need to be used, and use scene limitation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a footrest extension mechanism and a seat with the same. Background Art

[0002] In the prior art, in order to achieve a longer extension distance, the footrest extension mechanism usually adopts an extended four-bar linkage. However, the extended four-bar linkage often occupies too much space, resulting in limited usage scenarios of the seat. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a footrest extension mechanism that can achieve a large extension distance when the user needs to use the footrest component, and when the user does not need to use the footrest component, the footrest extension mechanism can save space and reduce usage restrictions.

[0004] The utility model also provides a chair, which includes the above-mentioned footrest extension mechanism.

[0005] The footrest extension mechanism according to the embodiment of the present invention is used for a seat and includes: a footrest component; a connecting rod assembly, the connecting rod assembly is arranged on the lower side of the base of the seat and includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, one end of the first connecting rod and one end of the second connecting rod are both rotatably connected to the base and spaced apart in the front-to-back direction, one end of the third connecting rod and one end of the fourth connecting rod are both rotatably connected to the footrest component and spaced apart in the width direction of the footrest component, one end of the third connecting rod and one end of the fourth connecting rod facing away from the footrest component are respectively rotatably connected to one end of the first connecting rod and the second connecting rod facing away from the base, and the middle area of ​​the fourth connecting rod along the length direction of the fourth connecting rod is rotatably connected to the middle area of ​​the first connecting rod along the length direction of the first connecting rod; a driving assembly, the driving assembly is fixed on the base and connected to the first connecting rod, and is used to drive the first connecting rod to rotate relative to the base.

[0006] According to the footrest extension mechanism of the embodiment of the present invention, a plurality of adjacent and mutually linked four-bar mechanisms are formed through the first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod, the footrest component and the base. The first connecting rod is driven to rotate relative to the base by the driving assembly to realize the contraction and expansion of the connecting rod assembly. When the user needs to use the footrest component, the length of the footrest component extending out of the base can be made longer, thereby realizing a large extension distance of the footrest extension mechanism. When the user does not need to use the footrest component, the footrest component can be stored, making the footrest extension mechanism compact in structure, saving the space occupied by the footrest extension mechanism, reducing the volume of the seat, reducing the restrictions on the use scenarios of the seat, and meeting the different usage needs of users.

[0007] In addition, the footrest extension mechanism according to the present invention may also have the following additional technical features:

[0008] In some embodiments, the first link, the second link, the fourth link and the base form a first link mechanism, the first link, the third link, the fourth link and the footrest component form a second link mechanism, and the footrest extension mechanism has a retracted state and an expanded state. In the retracted state, the first link mechanism is located on the upper side of the second link mechanism, and the first link mechanism and the second link mechanism are both located on the lower side of the base; in the expanded state, the first link mechanism is located on the rear side of the second link mechanism, and part of the first link mechanism and the second link mechanism are both located on the front side of the base.

[0009] In some embodiments, the connecting rod assembly also includes: a fifth connecting rod, wherein the two ends of the fifth connecting rod in the length direction are respectively rotatably connected to the first connecting rod and the second connecting rod, and along the length direction of the first connecting rod, the fifth connecting rod is located between the base and the fourth connecting rod, and along the length direction of the second connecting rod, the fifth connecting rod is located between the base and the fourth connecting rod.

[0010] In some embodiments, the footrest component includes: a footrest body, which extends along the left and right directions of the seat; a footrest mounting plate, which is connected to one side of the footrest body in the thickness direction, and the third connecting rod and the fourth connecting rod are both rotatably connected to the footrest mounting plate.

[0011] In some embodiments, the footrest mounting plate has a first limit column on one side along the left-right direction, and along the width direction of the footrest body, the first limit column is located between the connection point between the third link and the footrest mounting plate and the connection point between the fourth link and the footrest mounting plate. In the expanded state, the first limit column is against the third link to limit the third link from rotating in a direction close to the fourth link.

[0012] In some embodiments, the footrest extension mechanism also includes: a footrest fixing bracket, the footrest fixing bracket is fixed on the lower surface of the base, the first link and the second link are both rotatably connected to the footrest fixing bracket, and the connection point between the second link and the footrest fixing bracket is located on the rear side of the connection point between the first link and the footrest fixing bracket.

[0013] In some embodiments, the footrest fixing bracket has a second limiting column on one side along the left and right directions, and the second limiting column is located at the rear end of the footrest fixing bracket. In the retracted state, the second limiting column is against the second connecting rod to limit the second connecting rod from rotating in the direction away from the first connecting rod.

[0014] In some embodiments, there are a plurality of connecting rod assemblies spaced apart in the left-right direction, and the driving assembly is connected to the first connecting rods of the plurality of connecting rod assemblies to drive the first connecting rods of the plurality of connecting rod assemblies to rotate simultaneously.

[0015] In some embodiments, the driving assembly includes: a push rod bracket, which is fixedly connected to the first connecting rod; a push rod, one end of which in the length direction is rotatably connected to the push rod bracket; and a motor, which is fixed on the base and connected to the end of the push rod facing away from the push rod bracket, and is used to drive the push rod to move along the length direction of the push rod.

[0016] The utility model also provides a seat with the above embodiment.

[0017] According to the seat of the embodiment of the present invention, by being provided with the above-mentioned footrest extension mechanism, a plurality of adjacent and mutually linked four-bar mechanisms are formed through the first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod, the footrest component and the base. The first connecting rod is driven to rotate relative to the base by the driving assembly to realize the contraction and expansion of the connecting rod assembly. When the user needs to use the footrest component, the length of the footrest component extending out of the base can be made longer, thereby realizing a large extension distance of the footrest extension mechanism. When the user does not need to use the footrest component, the footrest component can be stored, making the footrest extension mechanism compact in structure, saving the space occupied by the footrest extension mechanism, reducing the volume of the seat, reducing the restrictions on the use scenarios of the seat, and meeting the different usage needs of users.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a perspective view of a seat according to an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3It is a right side view of a seat according to an embodiment of the present utility model.

[0023] Reference numerals:

[0024] 100. Seat;

[0025] 10. Footrest extension mechanism;

[0026] 1. Footrest component; 11. Footrest body; 12. Footrest mounting plate; 121. First limiting column;

[0027] 2. Connecting rod assembly; 21. First connecting rod; 22. Second connecting rod; 23. Third connecting rod; 24. Fourth connecting rod; 25. Fifth connecting rod;

[0028] 3. Drive assembly; 31. Push rod bracket;

[0029] 4. Footrest fixing bracket; 41. Second limiting column;

[0030] 20. Base. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0034] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] The footrest extension mechanism 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0036] like Figure 1 As shown, the footrest extension mechanism 10 according to an embodiment of the present invention is used for a seat 100 and includes a footrest component 1 , a connecting rod assembly 2 and a driving assembly 3 .

[0037] Specifically, refer to the attached Figure 1 and attached Figure 3 As shown, the footrest component 1 is used to support the user's feet. The user can place the feet flat on the footrest component 1, which effectively reduces the pressure on the legs and feet, promotes blood circulation, reduces fatigue caused by sitting for a long time, and improves the user experience.

[0038] Further, refer to the attached Figure 1 and attached Figure 3 As shown, the connecting rod assembly 2 is provided on the lower side of the base 20 of the seat 100 and includes a first connecting rod 21, a second connecting rod 22, a third connecting rod 23 and a fourth connecting rod 24. One end of the first connecting rod 21 and one end of the second connecting rod 22 are both rotatably connected to the base 20 and are in the front-to-back direction (such as Figure 3 One end of the third link 23 and one end of the fourth link 24 are both rotatably connected to the footrest component 1 and are spaced apart in the width direction of the footrest component 1 (see attached Figure 3 The ends of the third link 23 and the fourth link 24 facing away from the footrest component 1 are rotatably connected to the ends of the first link 21 and the second link 22 facing away from the base 20, respectively, and the fourth link 24 is connected along the length direction of the fourth link 24 (see the attached Figure 3 c direction shown in FIG) and the middle area of ​​the first connecting rod 21 along the length direction of the first connecting rod 21 (see FIG). Figure 2 The driving assembly 3 is fixed on the base 20 and connected to the first connecting rod 21 for driving the first connecting rod 21 to rotate relative to the base 20.

[0039] It can be understood that the first link 21 and the second link 22 are both rotatably connected to the base 20 and the fourth link 24 at the same time, and the third link 23 and the fourth link 24 are both rotatably connected to the footrest component 1 and the first link 21 at the same time, so that the first link 21, the second link 22, the third link 23, the fourth link 24, the footrest component 1 and the base 20 together form a plurality of adjacent and mutually linked four-bar mechanisms, and the first link 21 is driven to rotate relative to the base 20 by the driving component 3, so that the first link 21 drives the third link 23 and the fourth link 24 to move, and the second link 21 drives the third link 23 and the fourth link 24 to move. One end of 22 is rotatably connected to the base 20, and the other end is driven by the fourth connecting rod 24 to move together, so as to realize the contraction and expansion of the connecting rod assembly 2. When the user needs to use the footrest component 1, the footrest component 1 can be extended longer from the base 20, thereby realizing a large extension distance of the footrest extension mechanism 10. When the user does not need to use the footrest component 1, the footrest component 1 is stored, so that the footrest extension mechanism 10 has a compact structure, which saves the space occupied by the footrest extension mechanism 10, reduces the volume of the seat 100, reduces the restrictions on the use scenarios of the seat 100, and meets the different usage needs of users.

[0040] The footrest extension mechanism 10 has a retracted state and an extended state. When the footrest extension mechanism 10 switches from the retracted state to the extended state, the first link 21 and the second link 22 rotate toward the front side of the seat 100 under the drive of the drive assembly 3 ( Figure 3 ), the angle between the third link 23 and the first link 21 gradually increases, and the angle between the fourth link 24 and the first link 21 and the second link 22 gradually increases, driving the footrest component 1 to move forward. By adjusting the expansion degree of the link assembly 2, the height and angle of the footrest component 1 can be adjusted, which can provide foot support for the user according to the needs of the user, further relieve the fatigue caused by sitting for a long time, improve the comfort and support of the seat 100, and improve the user experience.

[0041] When the footrest extension mechanism 10 switches from the expanded state to the retracted state, the first link 21 and the second link 22 rotate toward the rear side of the seat 100 under the drive of the drive assembly 3 ( Figure 3 ), the angle between the third link 23 and the first link 21 gradually decreases, and the angles between the third link 23 and the fourth link 24 and the first link 21 and the second link 22 gradually decrease, driving the footrest component 1 to move backward. When the user does not need to use the footrest component 1, the footrest component 1 can be stored to the lower side of the base 20, making the footrest extension mechanism 10 compact, saving the space occupied by the footrest extension mechanism 10, and reducing the volume of the seat 100.

[0042] The footrest extension mechanism 10 of the present invention can be applied to chairs 100 such as office chairs 100, children's chairs 100, and e-sports chairs 100.

[0043] According to the footrest extension mechanism 10 of the embodiment of the present invention, a plurality of adjacent and mutually linked four-bar mechanisms are formed through the first link 21, the second link 22, the third link 23, the fourth link 24, the footrest component 1 and the base 20. The first link 21 is driven by the driving component 3 to rotate relative to the base 20 to realize the contraction and expansion of the link component 2. When the user needs to use the footrest component 1, the length of the footrest component 1 extending out of the base 20 can be made longer, thereby realizing a large extension distance of the footrest extension mechanism 10. When the user does not need to use the footrest component 1, the footrest component 1 is stored, making the footrest extension mechanism 10 compact in structure, saving the space occupied by the footrest extension mechanism 10, reducing the volume of the seat 100, reducing the restrictions on the use scenarios of the seat 100, and meeting the different usage needs of users.

[0044] In some embodiments of the present invention, Figure 1 and attached Figure 3 As shown, the first link 21, the second link 22, the fourth link 24 and the base 20 form a first link mechanism, the first link 21, the third link 23, the fourth link 24 and the footrest component 1 form a second link mechanism, and the footrest extension mechanism 10 has a retracted state and an expanded state. In the retracted state, the first link mechanism is located on the upper side of the second link mechanism, and the first link mechanism and the second link mechanism are both located on the lower side of the base 20, which can make full use of the space on the lower side of the base 20 and reduce the footrest extension mechanism 10 in the front and rear directions of the seat 100 (such as Figure 3 The space occupied by the footrest extension mechanism 10 is reduced, and the structure of the footrest extension mechanism 10 is more compact, and the volume of the footrest extension mechanism 10 in the retracted state is further reduced, thereby saving the space occupied by the footrest extension mechanism 10 and reducing the volume of the seat 100. The portion of the footrest extension mechanism 10 that exceeds the base 20 in the front-to-back direction can be reduced as much as possible to avoid affecting the user's normal use of the footrest extension mechanism 10 in the retracted state.

[0045] In the unfolded state, the first link mechanism is located on the rear side of the second link mechanism, and part of the first link mechanism and the second link mechanism are both located on the front side of the base 20. When the user needs to use the footrest component 1, the length of the footrest component 1 extending out of the base 20 can be as long as possible, thereby achieving a large extension distance of the footrest extension mechanism 10, thereby improving the compatibility of the footrest extension mechanism 10 and expanding the target users of the footrest extension mechanism 10.

[0046] In some embodiments of the present invention, Figure 1 and attached Figure 3 As shown, the connecting rod assembly 2 also includes a fifth connecting rod 25, the length direction of the fifth connecting rod 25 (refer to the attached Figure 2The two ends of the fifth link 25 are respectively connected to the first link 21 and the second link 22 in a rotational manner. Along the length direction of the first link 21, the fifth link 25 is located between the base 20 and the fourth link 24. Along the length direction of the second link 22 (see attached Figure 2 f direction shown), the fifth link 25 is located between the base 20 and the fourth link 24. It can be understood that the first link 21, the second link 22, the fourth link 24 and the base 20 form a first link mechanism. Adding the fifth link 25 to the four-link mechanism can strengthen the connection between the first link 21 and the second link 22, avoid insufficient supporting force due to the excessive length of the first link 21 and the second link 22, improve the matching reliability of the first link mechanism, and ensure the stability of the first link mechanism.

[0047] In a further embodiment of the present invention, refer to the attached Figure 1 and attached Figure 3 As shown, the footrest component 1 includes a footrest body 11 and a footrest mounting plate 12. The footrest body 11 is arranged along the left and right directions of the seat 100 (such as Figure 1 As shown) extends for the user to place both feet flat on the footrest body 11, ensuring that both feet of the user can be placed on the footrest body 11, and the footrest mounting plate 12 is connected to the footrest body 11 in the thickness direction (refer to the attached Figure 3 On one side of the footrest mounting plate 12 (in the g direction shown), the third connecting rod 23 and the fourth connecting rod 24 are both rotatably connected to the footrest mounting plate 12. The setting of the footrest mounting plate 12 can indirectly connect the footrest body 11 with the connecting rod assembly 2, and can drive the movement of the footrest body 11 through the movement of the footrest mounting plate 12 when the driving assembly 3 drives the connecting rod assembly 2 to retract or expand.

[0048] When the footrest extension mechanism 10 is in the contracted state, Figure 3 As shown, the footrest mounting plate 12 is located on the upper side of the footrest body 11 and is used to connect the footrest body 11 with the connecting rod assembly 2. When the footrest extension mechanism 10 is in the expanded state, the footrest mounting plate 12 is located on the lower side of the footrest body 11, which can better support the footrest body 11 and avoid the setting of structures such as the footrest mounting plate 12 and the connecting rod assembly 2 affecting the user's normal placement of the foot on the footrest body 11.

[0049] Optionally, the footrest mounting plate 12 is connected to the footrest body 11 by fasteners, which can reduce the difficulty of producing and processing the footrest mounting plate 12 and the footrest body 11, reduce the difficulty of assembling the footrest mounting plate 12 and the footrest body 11, improve the assembly efficiency of the footrest mounting plate 12 and the footrest body 11, and ensure the connection reliability and stability of the footrest mounting plate 12 and the footrest body 11.

[0050] In a further embodiment of the present invention, referring to the attached Figure 2As shown, the footrest mounting plate 12 has a first limiting column 121 on one side along the left and right directions. Along the width direction of the footrest body 11, the first limiting column 121 is located between the connection point between the third link 23 and the footrest mounting plate 12 and the connection point between the fourth link 24 and the footrest mounting plate 12. In the expanded state, the first limiting column 121 is against the third link 23 to limit the third link 23 from rotating in the direction close to the fourth link 24. The setting of the first limiting column 121 can limit the third link 23 to prevent the angle between the third link 23 and the first link 21 from continuing to increase, thereby ensuring the stability and reliability of the footrest extension mechanism 10 in the expanded state and preventing the footrest extension mechanism 10 from shrinking when the user places both feet on the footrest body 11.

[0051] It should be noted that, refer to the attached Figure 2 As shown, along the left-right direction, the first limiting column 121 and the third connecting rod 23 are located on the same side of the footrest mounting plate 12 to ensure the limiting effect of the first limiting column 121 on the third connecting rod 23 .

[0052] In a further embodiment of the present invention, refer to the attached Figure 1 and attached Figure 3 As shown, the footrest extension mechanism 10 also includes a footrest fixing bracket 4, which is fixed to the lower surface of the base 20. The first link 21 and the second link 22 are both rotatably connected to the footrest fixing bracket 4, and the connection point between the second link 22 and the footrest fixing bracket 4 is located behind the connection point between the first link 21 and the footrest fixing bracket 4. The footrest fixing bracket 4 has a simple structure. The setting of the footrest fixing bracket 4 can facilitate the fixing of the footrest extension mechanism 10 on the lower surface of the base 20, and can facilitate the connection between the first link 21 and the second link 22 and the base 20.

[0053] Optionally, the footrest fixing bracket 4 is fixed to the lower surface of the base 20 by fasteners, which can reduce the production and processing difficulty of the footrest fixing bracket 4, reduce the assembly difficulty of the footrest fixing bracket 4, improve the assembly efficiency of the footrest fixing bracket 4, and ensure the connection reliability and stability of the footrest fixing bracket 4 and the base 20.

[0054] In a further embodiment of the present invention, referring to the attached Figure 1 and attached Figure 2As shown, the footrest fixing bracket 4 has a second limiting column 41 on one side along the left and right directions. The second limiting column 41 is located at the rear end of the footrest fixing bracket 4. In the retracted state, the second limiting column 41 is against the second connecting rod 22 to limit the second connecting rod 22 from rotating in the direction away from the first connecting rod 21. The setting of the second limiting column 41 can limit the second connecting rod 22 to avoid the angle between the second connecting rod 22 and the fourth connecting rod 24 from continuing to decrease, and avoid excessive contraction of the connecting rod assembly 2 resulting in interference between the connecting rods, thereby ensuring the stability and reliability of the footrest extension mechanism 10 in the retracted state and preventing the connecting rod mechanism from automatically expanding when the driving assembly 3 is not driven.

[0055] It should be noted that, refer to the attached Figure 1 As shown, along the left-right direction, the second limiting column 41 and the second connecting rod 22 are located on the same side of the footrest fixing bracket 4 to ensure the limiting effect of the second limiting column 41 on the second connecting rod 22 .

[0056] In some embodiments of the present invention, Figure 1 and attached Figure 3 As shown, there are multiple connecting rod assemblies 2 arranged at intervals along the left and right directions, and the driving assembly 3 is connected to the first connecting rods 21 of the multiple connecting rod assemblies 2 to drive the first connecting rods 21 of the multiple connecting rod assemblies 2 to rotate at the same time, so that one driving assembly 3 can simultaneously drive the first connecting rods 21 of the multiple connecting rod assemblies 2 to rotate, ensuring that the multiple first connecting rods 21 rotate synchronously and drive the footrest component 1 to move. This can improve the driving effect of the connecting rod assembly 2 on the footrest component 1, ensure that the thrust exerted on the footrest component 1 in the left and right directions is balanced, and ensure that the footrest component 1 moves synchronously in the left and right directions.

[0057] For example, the connecting rod assemblies 2 may be two, three or four arranged at intervals along the left and right directions, and the first connecting rod 21 of each connecting rod assembly 2 is connected to the driving assembly 3, and the driving assembly 3 can drive the first connecting rods 21 of multiple connecting rod assemblies 2 to rotate simultaneously. Figure 1 and attached Figure 3 As shown, there are two connecting rod assemblies 2 spaced apart in the left-right direction, and the driving assembly 3 is connected to the first connecting rods 21 of the two connecting rod assemblies 2 to drive the first connecting rods 21 of the two connecting rod assemblies 2 to rotate simultaneously.

[0058] In some embodiments of the present invention, Figure 1As shown, the driving assembly 3 includes a push rod bracket 31, a push rod and a motor. The push rod bracket 31 is fixedly connected to the first connecting rod 21, and one end of the push rod in the length direction is rotatably connected to the push rod bracket 31. The motor is fixed to the base 20 and is connected to the end of the push rod away from the push rod bracket 31, and is used to drive the push rod to move along the length direction of the push rod. It can be understood that when the footrest extension mechanism 10 switches from the retracted state to the expanded state, the motor drives the push rod to move forward, and the push rod drives the push rod bracket 31 to move forward, so that the first connecting rod 21 rotates toward the front side of the seat 100 ( Figure 3 When the footrest extension mechanism 10 is switched from the expanded state to the retracted state, the motor drives the push rod to move backward, and the push rod drives the push rod bracket 31 to move backward, so that the first link 21 rotates toward the rear side of the seat 100 ( Figure 3 Clockwise as shown in ).

[0059] It should be noted that the motor can be used to control the expansion and contraction of the footrest extension mechanism 10, which is easy to operate and can achieve automatic expansion and contraction without manually pulling out or pushing back the footrest body 11. This can improve the automation and intelligence of the footrest extension mechanism 10 and enhance the user experience. In addition, according to different user needs, the motor can also control the distance the push rod moves along the length of the push rod, so that the footrest component 1 can stay in the position desired by the user.

[0060] In a specific example, see the attached Figure 1 and attached Figure 3 As shown, the connecting rod assembly 2 is spaced apart in the left-right direction, and the push rod bracket 31 extends in the left-right direction. The length direction of the push rod bracket 31 (refer to the attached Figure 1 The two ends of the left and right directions (as shown) are respectively fixedly connected to the first connecting rods 21 of the two connecting rod assemblies 2 to drive the first connecting rods 21 of the two connecting rod assemblies 2 to rotate simultaneously.

[0061] Of course, the present invention is not limited thereto, and the push rod and the motor may be replaced by other types of drive motors, which are connected to the push rod to drive the push rod bracket 31 to rotate.

[0062] The present invention also provides a chair 100 having the footrest extension mechanism 10 of the above embodiment.

[0063] According to the seat 100 of the embodiment of the present invention, the above-mentioned footrest extension mechanism 10 is provided, and a plurality of adjacent and mutually linked four-bar mechanisms are formed through the first connecting rod 21, the second connecting rod 22, the third connecting rod 23, the fourth connecting rod 24, the footrest component 1 and the base 20. The first connecting rod 21 is driven to rotate relative to the base 20 by the driving assembly 3 to realize the contraction and expansion of the connecting rod assembly 2. When the user needs to use the footrest component 1, the length of the footrest component 1 extending out of the base 20 can be made longer, thereby realizing a large extension distance of the footrest extension mechanism 10. When the user does not need to use the footrest component 1, the footrest component 1 is stored, making the footrest extension mechanism 10 compact in structure, saving the space occupied by the footrest extension mechanism 10, reducing the volume of the seat 100, reducing the restrictions on the use scenarios of the seat 100, and meeting the different usage needs of users.

[0064] Other structures and operations of the footrest extension mechanism 10 and the seat 100 according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0066] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A footrest extension mechanism, characterized in that: For a seat (100) and comprising: Footrest component (1); A connecting rod assembly (2), the connecting rod assembly (2) is arranged on the lower side of the base (20) of the seat (100) and includes a first connecting rod (21), a second connecting rod (22), a third connecting rod (23) and a fourth connecting rod (24), one end of the first connecting rod (21) and one end of the second connecting rod (22) are both rotatably connected to the base (20) and spaced apart in the front-to-back direction, one end of the third connecting rod (23) and one end of the fourth connecting rod (24) are both rotatably connected to the footrest component (1) The third connecting rod (23) and the fourth connecting rod (24) are connected and spaced apart in the width direction of the foot support component (1), and the ends of the third connecting rod (23) and the fourth connecting rod (24) facing away from the foot support component (1) are respectively rotatably connected to the ends of the first connecting rod (21) and the second connecting rod (22) facing away from the base (20), and the middle area of ​​the fourth connecting rod (24) along the length direction of the fourth connecting rod (24) is rotatably connected to the middle area of ​​the first connecting rod (21) along the length direction of the first connecting rod (21); A driving assembly (3) is fixed on the base (20) and connected to the first connecting rod (21), and is used to drive the first connecting rod (21) to rotate relative to the base (20).

2. The footrest extension mechanism according to claim 1, characterized in that: The first link (21), the second link (22), the fourth link (24) and the base (20) form a first link mechanism, the first link (21), the third link (23), the fourth link (24) and the footrest component (1) form a second link mechanism, and the footrest extension mechanism (10) has a contracted state and an expanded state. In the retracted state, the first link mechanism is located on the upper side of the second link mechanism, and both the first link mechanism and the second link mechanism are located on the lower side of the base (20); In the deployed state, the first link mechanism is located at the rear side of the second link mechanism, and parts of the first link mechanism and the second link mechanism are both located at the front side of the base (20).

3. The footrest extension mechanism according to claim 1, characterized in that: The connecting rod assembly (2) further comprises: A fifth connecting rod (25), the two ends of the fifth connecting rod (25) in the length direction are rotatably connected to the first connecting rod (21) and the second connecting rod (22) respectively, along the length direction of the first connecting rod (21), the fifth connecting rod (25) is located between the base (20) and the fourth connecting rod (24), and along the length direction of the second connecting rod (22), the fifth connecting rod (25) is located between the base (20) and the fourth connecting rod (24).

4. The footrest extension mechanism according to claim 2, characterized in that: The footrest component (1) comprises: A footrest body (11), the footrest body (11) extending in the left-right direction of the seat (100); A footrest mounting plate (12) is connected to one side of the footrest body (11) in the thickness direction, and the third connecting rod (23) and the fourth connecting rod (24) are both rotatably connected to the footrest mounting plate (12).

5. The footrest extension mechanism according to claim 4, characterized in that: The footrest mounting plate (12) has a first limiting column (121) on one side along the left-right direction. Along the width direction of the footrest body (11), the first limiting column (121) is located between the connection point between the third link (23) and the footrest mounting plate (12) and the connection point between the fourth link (24) and the footrest mounting plate (12). In the expanded state, the first limiting column (121) is against the third link (23) to limit the third link (23) from rotating in the direction close to the fourth link (24).

6. The footrest extension mechanism according to claim 2, characterized in that: The footrest extension mechanism (10) further comprises: A footrest fixing bracket (4), wherein the footrest fixing bracket (4) is fixed on the lower surface of the base (20), the first connecting rod (21) and the second connecting rod (22) are both rotatably connected to the footrest fixing bracket (4), and the connection point between the second connecting rod (22) and the footrest fixing bracket (4) is located at the rear side of the connection point between the first connecting rod (21) and the footrest fixing bracket (4).

7. The footrest extension mechanism according to claim 6, characterized in that: The footrest fixing bracket (4) has a second limiting column (41) on one side along the left-right direction. The second limiting column (41) is located at the rear end of the footrest fixing bracket (4). In the retracted state, the second limiting column (41) abuts against the second connecting rod (22) to limit the second connecting rod (22) from rotating in a direction away from the first connecting rod (21).

8. The footrest extension mechanism according to claim 1, characterized in that: The connecting rod assemblies (2) are arranged in a plurality at intervals along the left-right direction, and the driving assembly (3) is connected to the first connecting rods (21) of the plurality of connecting rod assemblies (2) to drive the first connecting rods (21) of the plurality of connecting rod assemblies (2) to rotate simultaneously.

9. The footrest extension mechanism according to claim 1, characterized in that: The driving assembly (3) comprises: a push rod bracket (31), wherein the push rod bracket (31) is fixedly connected to the first connecting rod (21); A push rod, one end of which in the length direction is rotatably connected to the push rod bracket (31); A motor is fixed on the base (20) and connected to an end of the push rod facing away from the push rod bracket (31), and is used to drive the push rod to move along the length direction of the push rod.

10. A seat, characterized in that: It comprises a foot support extension mechanism (10) according to any one of claims 1-9.

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