Leg support adjusting mechanism and automobile seat

Abstract

The utility model provides a leg support adjusting mechanism and an automobile seat. The leg support adjusting mechanism comprises a leg support assembly; the foot support assembly is connected to the leg support assembly in a turnover mode; the overturning driving assembly is connected to the leg support assembly and the foot support assembly and can drive the foot support assembly to overturn relative to the leg support assembly; wherein the overturning driving assembly comprises an overturning driving part and an overturning transmission structure, the overturning driving part is connected to the leg support assembly, and the overturning transmission structure can only transmit the driving action of the overturning driving part to the foot support assembly. According to the arrangement, through the arrangement of the overturning transmission structure, the driving action output by the overturning driving piece can be transmitted to the foot support assembly in a single direction, the action on the foot support assembly is prevented from being transmitted to the overturning driving piece, the structural stability is good, and locking of multiple different overturning angles of the foot support assembly is facilitated; and the use requirements of different users can be met.

Description

Technical Field

[0001] The present application relates to the technical field of automobile seats, and in particular to a leg support adjustment mechanism and an automobile seat. Background Art

[0002] At present, some car seats are equipped with a leg rest mechanism with a footrest, which can provide certain support for the calves and feet and relieve the soreness caused by sitting for too long. In the prior art, the footrest is generally flipped relative to the leg rest mechanism by the form of a motor driving a gear set to rotate. However, the transmission form of the motor driving the gear set is easy to cause the gear set to reverse under the influence of external force, and the structural stability is poor, which is not conducive to locking multiple different flip angles of the footrest to meet the use needs of different users. Utility Model Content

[0003] In view of this, the present application provides a leg rest adjustment mechanism and a car seat, which are conducive to locking a plurality of different flip angles of the foot rest assembly.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A leg support adjustment mechanism, comprising:

[0006] Leg rest assembly;

[0007] A foot support assembly, reversibly connected to the leg support assembly;

[0008] A flip driving assembly, connected to the leg rest assembly and the foot rest assembly, and capable of driving the foot rest assembly to flip relative to the leg rest assembly;

[0009] Wherein, the flip driving assembly includes a flip driving member and a flip transmission structure, the flip driving member is connected to the leg rest assembly, and the flip transmission structure can only transmit the driving action of the flip driving member to the foot rest assembly.

[0010] Optionally, the flip transmission structure includes:

[0011] A first screw-nut pair having a screw portion and a nut portion;

[0012] Wherein, the nut part is transmission connected to the flip driving member, and the screw part is transmission connected to the foot support assembly.

[0013] Optionally, the flip transmission structure includes:

[0014] Turn the gear and the sector gear plate to mesh and connect them;

[0015] Wherein, the flip gear is connected to the flip shaft of the footrest assembly and can drive the footrest assembly to flip; the fan-shaped tooth plate is rotatably connected to the legrest assembly and is transmission-connected to the lead screw part.

[0016] Optionally, the screw part is connected to the sector tooth plate through a swinging member, the first end of the swinging member is connected to the sector tooth plate and can rotate coaxially with the sector tooth plate; the second end of the swinging member is hinged to the screw part.

[0017] Optionally, a mounting seat is provided on the leg support assembly, the flip gear and the fan-shaped tooth plate are arranged in the mounting seat, and a mounting hole for the flip shaft to pass through is provided on the mounting seat.

[0018] Optionally, the leg support assembly comprises:

[0019] A first leg rest and a second leg rest, wherein the second leg rest is slidably connected to the first leg rest; and a telescopic driving assembly is connected to the first leg rest and the second leg rest to drive the second leg rest to telescope relative to the first leg rest;

[0020] Among them, the telescopic driving assembly includes a telescopic driving member and a telescopic transmission structure, the telescopic driving member is connected to the first leg support, the telescopic transmission structure is connected to the first leg support and the second leg support, and can amplify the driving stroke of the telescopic driving member.

[0021] Optionally, the telescopic transmission structure comprises:

[0022] The first connecting rod and the second connecting rod are cross-arranged and hinged at the intersection;

[0023] Among them, the first connecting rod and the second connecting rod both have a power end and a resistance end, and the distance between the power end and the intersection position is smaller than the distance between the resistance end and the intersection position; the telescopic driving component can drive the two power ends to move closer and farther away, and the two resistance ends moving closer and farther away can drive the second leg rest to extend and retract relative to the first leg rest.

[0024] Optionally, the telescopic transmission structure comprises:

[0025] a third connecting rod and a fourth connecting rod, wherein the first end of the third connecting rod and the first end of the fourth connecting rod are hinged at a first position on the first leg support, the second end of the third connecting rod is hinged to the power end of the first connecting rod, and the second end of the fourth connecting rod is hinged to the power end of the second connecting rod;

[0026] A fifth connecting rod and a sixth connecting rod, wherein the first end of the fifth connecting rod and the first end of the sixth connecting rod are hinged at a second position on the second leg support, the second end of the fifth connecting rod is hinged to the resistance end of the first connecting rod, and the second end of the sixth connecting rod is hinged to the resistance end of the second connecting rod;

[0027] Wherein, the telescopic driving member is connected to the intersection position and can drive the intersection position to approach and move away from the first position.

[0028] Optionally, the telescopic drive member is transmission-connected to the telescopic transmission structure via a second screw nut pair.

[0029] Optionally, the leg support assembly comprises:

[0030] A first leg support and a second leg support, wherein the second leg support is slidably connected to the inner side of the first leg support;

[0031] The footrest assembly can be flipped to the side of the second leg rest and hidden in the first leg rest along with the second leg rest.

[0032] Optionally, a receiving groove is provided on the side of the second leg rest, and the foot rest assembly can be embedded in the receiving groove and be flush with the side of the second leg rest.

[0033] A car seat comprises a leg rest adjustment mechanism, wherein the leg rest adjustment mechanism is the leg rest adjustment mechanism as described in any one of the above items.

[0034] The leg rest adjustment mechanism and the car seat provided by the present application, the flip drive assembly is connected to the leg rest assembly and the foot rest assembly, and the foot rest assembly can be driven to flip relative to the leg rest assembly through the driving action of the flip drive assembly. Wherein, the flip drive assembly includes a driving member and a flip transmission structure, and the flip drive member is connected to the leg rest assembly for outputting a driving action. The flip transmission structure is transmission-connected between the flip drive member and the foot rest assembly, and is used to transmit the driving action output by the flip drive member to the foot rest assembly, and the flip transmission structure can prevent the action on the foot rest assembly from being transmitted to the flip drive member. During use, under the action of the flip transmission structure, the flip drive member can drive the foot rest assembly to flip to a specific angle relative to the leg rest assembly. When the foot rest assembly is subjected to force, the flip transmission structure can prevent the action of the foot rest assembly from being transmitted to the flip drive member, thereby actually keeping the foot rest assembly at the specific angle, and the structural stability is good. With such a configuration, through the setting of the flip transmission structure, the driving action output by the flip driving component can be transmitted to the foot rest assembly in one direction, and the action on the foot rest assembly can be prevented from being transmitted to the flip driving component. The structural stability is good, which is conducive to locking multiple different flip angles of the foot rest assembly to meet the usage needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0036] Figure 1 A perspective view of a leg support adjustment mechanism according to some embodiments;

[0037] Figure 2 It is a schematic diagram of the back structure of the leg support adjustment mechanism shown in some embodiments;

[0038] Figure 3 It is a schematic diagram of the front structure of the leg support adjustment mechanism shown in some embodiments;

[0039] Figure 4 Schematic diagram of a flip transmission structure shown in some embodiments;

[0040] Figure 5 A cross-sectional view showing the location of the flip axis in some embodiments.

[0041] In the figure: 1. first leg rest; 2. second leg rest; 3. foot rest assembly; 4. flip driving member; 5. flip transmission structure; 6. telescopic driving member; 7. telescopic transmission structure; 21. accommodating groove; 31. flip shaft; 51. screw part; 52. swinging member; 53. mounting seat; 54. fan-shaped tooth plate; 55. flip gear; 71. first connecting rod; 72. second connecting rod; 73. third connecting rod; 74. fourth connecting rod; 75. fifth connecting rod; 76. sixth connecting rod. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] like Figure 1-Figure 5As shown, an embodiment of the present application provides a leg rest adjustment mechanism, including a leg rest assembly, a foot rest assembly 3 and a flip drive assembly. The leg rest assembly is used to support the user's legs, the foot rest assembly 3 is used to support the user's feet, the foot rest assembly 3 is connected to the lower end of the leg rest assembly, and can be flipped relative to the leg rest assembly to achieve the folding and unfolding of the foot rest assembly 3 relative to the leg rest assembly. For example, a flip shaft 31 is provided on the foot rest assembly 3, and a flip hole is provided on the leg rest assembly, and the flip shaft 31 is rotatably connected in the flip hole.

[0044] The flip drive assembly is connected to the leg support assembly and the foot support assembly 3, and the foot support assembly 3 can be driven to flip relative to the leg support assembly through the driving action of the flip drive assembly. Wherein, the flip drive assembly includes a driving member and a flip transmission structure 5, and the flip drive member 4 is connected to the leg support assembly for outputting a driving action, for example, the flip drive member 4 is set as a motor structure to output a rotation action. The flip transmission structure 5 is transmission-connected between the flip drive member 4 and the foot support assembly 3, and is used to transmit the driving action output by the flip drive member 4 to the foot support assembly 3, and the flip transmission structure 5 can prevent the action on the foot support assembly 3 from being transmitted to the flip drive member 4. During use, under the action of the flip transmission structure 5, the flip drive member 4 can drive the foot support assembly 3 to flip to a specific angle relative to the leg support assembly. When the foot support assembly 3 is stressed, the flip transmission structure 5 can prevent the action of the foot support assembly 3 from being transmitted to the flip drive member 4, thereby maintaining the foot support assembly 3 at the specific angle, and the structural stability is good.

[0045] With such a configuration, through the configuration of the flip transmission structure 5, the driving action output by the flip driving component 4 can be transmitted to the foot rest assembly 3 in one direction, and the action on the foot rest assembly 3 can be prevented from being transmitted to the flip driving component 4. The structural stability is good, which is conducive to locking the foot rest assembly 3 at multiple different flip angles to meet the usage needs of different users.

[0046] It should be noted that, since the flip driving member 4 is connected to the leg rest assembly and connected to the foot rest assembly 3 through the flip transmission structure 5, the flip driving member 4 can be kept away from the flip axis 31 of the foot rest assembly 3, so that the structure on the foot rest assembly 3 is relatively simple, occupies less space, and is conducive to realizing the flipping of the foot rest assembly 3. Moreover, the flip driving member 4 is connected to the leg rest assembly, and the structure is stable, which is conducive to optimizing the spatial layout of the leg rest adjustment mechanism.

[0047] In this solution, the flip transmission structure 5 includes a first screw-nut pair, which has a screw portion 51 and a nut portion, wherein the nut portion is in transmission connection with the flip driving member 4, and the screw portion 51 is in transmission connection with the footrest assembly 3, so as to prevent the movement of the footrest assembly 3 from being transmitted to the flip driving member 4. During operation, the flip driving member 4 drives the nut portion to rotate, the nut portion drives the screw portion 51 to move, and the screw portion 51 drives the footrest assembly 3 to flip relative to the legrest assembly, so that the driving movement of the flip driving member 4 can be transmitted to the footrest assembly 3. Due to the structural characteristics of the first screw-nut pair, the screw portion 51 cannot drive the nut portion to rotate, thereby preventing the movement of the footrest assembly 3 from being transmitted to the flip driving member 4, which is conducive to keeping the position of the footrest assembly 3 stable and avoiding damage to the flip driving member 4.

[0048] In other optional solutions, the first screw nut pair can be replaced by a structure such as a worm gear that can transmit power in one direction.

[0049] like Figure 4-5 As shown, the flip transmission structure 5 also includes a flip gear 55 and a fan-shaped toothed plate 54, and the flip gear 55 and the fan-shaped toothed plate 54 are meshed with external teeth to achieve a transmission connection between the two. For example, the rotation axes of the flip gear 55 and the fan-shaped toothed plate 54 are parallel, and the rotation of one can drive the other to rotate. Wherein, the flip gear 55 is connected to the flip shaft 31 of the foot support assembly 3, for example, the flip gear 55 is sleeved on the outer periphery of the flip shaft 31, and is fixed by a key or a screw connection so that the flip gear 55 and the flip shaft 31 rotate coaxially. The fan-shaped toothed plate 54 is connected to the leg support assembly and can rotate relative to the leg support assembly, and the fan-shaped toothed plate 54 is transmission-connected with the lead screw part 51, and the action of the lead screw part 51 can drive the fan-shaped toothed plate 54 to rotate, thereby causing the flip gear 55 to drive the flip shaft 31 to flip, for example, the fan-shaped toothed plate 54 is connected to the mounting seat 53 on the leg support assembly through a rotating shaft, and the lead screw part 51 is transmission-connected with the rotating shaft so that the fan-shaped toothed plate 54 is equivalent to the mounting seat 53 and the leg support assembly. In this way, the action on the lead screw 51 can be transmitted to the footrest assembly 3 through the transmission form of the flip gear 55 and the fan-shaped tooth plate 54, which is conducive to improving the transmission reliability. In addition, since there are only a part of the fan-shaped teeth on the fan-shaped tooth plate 54, the travel required for the flipping of the footrest assembly 3 can be met through the form of cooperation with the flip gear 55. Compared with the gear, the fan-shaped tooth plate 54 can save space, facilitate the avoidance of other components, and help optimize the space layout.

[0050] The lead screw part 51 of the first lead screw nut pair is connected to the sector tooth plate 54 through a swinging member 52. The swinging member 52 has a first end and a second end. The first end of the swinging member 52 is connected to the sector tooth plate 54 and can rotate coaxially with the tooth plate 54. For example, the first end of the swinging member 52 is connected to a rotating shaft, and the rotating shaft is arranged at the rotation center of the sector tooth plate 54, so that the swinging member 52 and the sector tooth plate 54 can rotate synchronously with the rotating shaft as the axis. The second end of the swinging member 52 is hinged to the lead screw part 51 of the first lead screw nut pair. During use, the flip driving member 4 drives the lead screw part 51 to move, and the lead screw part 51 drives the second end of the swinging member 52 to rotate (swing) with the first end as the axis, and the swinging member 52 drives the sector tooth plate 54 to rotate. In this way, the driving torque can be lengthened by driving the sector tooth plate 54 to rotate in the form of swinging of the swinging member 52, which is conducive to reducing the driving energy consumption.

[0051] It should be noted that, since the driving action of the screw part 51 of the first screw nut pair is linear displacement, and the action of the second end of the swinging member 52 is circular arc swing, the whole formed by the flip driving member 4 and the first screw nut pair can have a certain offset, so that the end of the screw part 51 has a margin to adapt to the swinging of the swinging member 52, for example, the whole is rotatably connected to the leg support assembly. Alternatively, the hinge of the screw part 51 and the swinging member 52 has a certain margin, for example, one of the screw part 51 and the swinging member 52 is provided with a sliding hole, and the other is hinged in the sliding hole and can be offset along the sliding hole.

[0052] In some preferred solutions, a mounting seat 53 is provided on the leg support assembly, and the flip gear 55 and the sector tooth plate 54 are provided in the mounting seat 53. A mounting hole for the flip shaft 31 to pass through is provided on the mounting seat 53, so that the transmission connection between the flip gear 55 and the sector tooth plate 54 can be protected and the connection reliability between the foot support assembly 3 and the leg support assembly can be improved. For example, the mounting seat 53 has two opposite side plates, and the flip gear 55 and the sector tooth plate 54 are rotatably connected between the two side plates, and both side plates are provided with mounting holes for the flip shaft 31 to pass through.

[0053] The swinging member 52 is configured as a strip plate and is located outside the mounting seat 53. The swinging member 52 is connected to the fan-shaped toothed plate 54 via a rotating shaft. A guide hole is provided on the mounting seat 53, and a guide column is provided on the swinging member 52. The guide column is slidably arranged in the guide hole to guide the displacement of the swinging member 52, thereby improving the stability of the swinging of the swinging member 52.

[0054] In some embodiments, the leg rest assembly includes a first leg rest 1, a second leg rest 2 and a telescopic drive assembly. The second leg rest 2 is connected to the first leg rest 1 and can be telescopic relative to the first leg rest 1. For example, a accommodating cavity is arranged inside the first leg rest 1, and a plurality of (for example, four) sliding rails are arranged between the second leg rest 2 and the side wall of the accommodating cavity so that the second leg rest 2 can extend into and out of the accommodating cavity, thereby realizing the shortening and lengthening of the leg rest assembly.

[0055] The telescopic driving component is connected to the first leg rest 1 and the second leg rest 2, and can drive the second leg rest 2 to be telescopic and retractable equivalent to the first leg rest 1, wherein the telescopic driving component includes a telescopic driving member 6 and a telescopic transmission structure 7, the telescopic driving member 6 is connected to the first leg rest 1, the telescopic transmission structure 7 is connected to the first leg rest 1 and the second leg rest 2, and can amplify the driving stroke of the telescopic driving member 6, for example, the telescopic transmission structure 7 has a power part and a resistance part, the power part is connected to the telescopic driving member 6, and the resistance part is connected to the first leg rest 1 and the second leg rest 2, the power part can drive the resistance part to move, when the power part moves a first distance, the resistance part moves a second distance, and the second distance is greater than the first distance.

[0056] In this way, through the design of the telescopic transmission structure 7, the driving path of the telescopic drive member 6 can be made smaller than the telescopic path of the second leg rest 2 equivalent to the first leg rest 1, thereby reducing the driving stroke of the telescopic drive member 6, which is beneficial to reducing the space occupied by the telescopic drive member 6, and further beneficial to optimizing the spatial layout.

[0057] The telescopic transmission structure 7 includes a first connecting rod 71 and a second connecting rod 72, which are cross-arranged and hinged at an intersection, that is, the middle of the first connecting rod 71 is hinged to the middle of the second connecting rod 72, and the hinged position is the intersection, so as to form an X-shaped structure. The first connecting rod 71 and the second connecting rod 72 both have a power end and a resistance end. In the first connecting rod 71 and the second connecting rod 72, the distance between the power end and the intersection is smaller than the distance between the resistance end and the intersection, that is, the length of the power arm is greater than the length of the resistance arm, so that the lever structure formed by the first connecting rod 71 and the second connecting rod 72 is a laborious lever. During use, the telescopic drive member 6 drives the power end of the first connecting rod 71 and the power end of the second connecting rod 72 to move closer and farther away, thereby making the resistance end of the first connecting rod 71 and the resistance end of the second connecting rod 72 move closer and farther away (or farther and closer) accordingly. The resistance end of the first connecting rod 71 and the resistance end of the second connecting rod 72 move closer and farther away, driving the second leg support 2 to be equivalent to the telescopic movement of the first leg support 1. Since the length of the power arm is greater than the length of the resistance arm, the displacement of the two power ends is smaller than the displacement of the two resistance ends, and smaller than the telescopic displacement of the second leg support 2 equivalent to the first leg support 1. This is conducive to reducing the driving stroke, and the structure is simple, stable and reliable.

[0058] In a specific feasible solution, the power end of the first connecting rod 71 and the power end of the second connecting rod 72 are respectively connected to the first leg rest 1 and the telescopic driving member 6, and the resistance end of the first connecting rod 71 and the resistance end of the second connecting rod 72 are respectively connected to the first leg rest 1 and the second leg rest 2.

[0059] like Figure 3 As shown, in the preferred embodiment, the telescopic transmission structure 7 includes a third connecting rod 73, a fourth connecting rod 74, a fifth connecting rod 75 and a sixth connecting rod 76. The first end of the third connecting rod 73 is hinged to the first end of the fourth connecting rod 74 and is hinged at a first position on the first leg support 1, the second end of the third connecting rod 73 is hinged to the power end of the first connecting rod 71, and the second end of the fourth connecting rod 74 is hinged to the power end of the second connecting rod 72, so that the first connecting rod 71, the second connecting rod 72, the third connecting rod 73 and the fourth connecting rod 74 are surrounded by a deformable first diamond frame. The first end of the fifth connecting rod 75 is hinged to the first end of the sixth connecting rod 76 and is hinged at a second position on the second leg support 2, the second end of the fifth connecting rod 75 is hinged to the resistance end of the first connecting rod 71, and the second end of the sixth connecting rod 76 is hinged to the resistance end of the second connecting rod 72, so that the first connecting rod 71, the second connecting rod 72, the fifth connecting rod 75 and the sixth connecting rod 76 are surrounded by a deformable second diamond frame. Since the first diamond frame and the second diamond frame have a common first connecting rod 71 and second connecting rod 72, when the first diamond frame changes, the second diamond frame changes accordingly, thereby driving the first position and the second position to move closer and farther, so as to achieve the extension and retraction of the second leg support 2 equivalent to the first leg support 1. Moreover, the first diamond frame is smaller than the second diamond frame, so that the change stroke of the first diamond frame is smaller than the change stroke of the second diamond frame.

[0060] The telescopic drive member 6 is connected to the above-mentioned intersection position, and can be specifically hinged. During use, the telescopic drive member 6 drives the intersection position to approach the first position on the first leg rest 1, the first diamond frame deforms and drives the second diamond frame to deform, and then the second position on the second leg rest 2 is close to the intersection position and the first position on the first leg rest 1, that is, the distance change between the first position and the second position is equal to the telescopic amount of the second leg rest 2 equivalent to the first leg rest 1. In this way, the driving stroke of the telescopic drive member 6 can be further amplified, and the stability of the telescopic transmission structure 7 can be improved.

[0061] Among them, the telescopic drive member 6 is connected to the telescopic transmission structure through a second screw nut pair. For example, the telescopic drive member 6 is set as a motor structure to output a rotational motion. Through the action of the second screw nut pair, the rotational motion can be converted into a linear motion. The structure is stable and reliable, and can prevent the action on the telescopic transmission structure 7 from being transmitted to the telescopic drive member 6, and has a self-locking and protective function.

[0062] In some embodiments, the footrest assembly 3 can be flipped to the side of the second leg rest 2, and the side can be the upper surface or the lower surface of the second leg rest 2, and the upper surface is preferred here, which is conducive to reducing the flipping stroke of the footrest assembly 3. Moreover, the footrest assembly 3 and the second leg rest 2 can be extended into and hidden inside the first leg rest 1 together, so that the problem of rubbing the legs caused by the footrest assembly 3 being exposed to the outside of the leg rest assembly can be avoided. At the same time, the support surface of the first leg rest 1 is flat and beautiful, and has a larger support surface, which is conducive to heating and massaging the legs, further improving the riding comfort.

[0063] like Figure 1 As shown, a receiving groove 21 is provided on the side of the second leg rest 2, and the receiving groove 21 is close to the foot rest assembly 3. When the foot rest assembly 3 is folded, the foot rest assembly 3 can be embedded in the receiving groove 21, and the foot rest assembly 3 is flush with the side of the second leg rest 2 (i.e., the notch of the receiving groove 21). For example, the thickness of the foot rest assembly 3 matches the depth of the receiving groove 21. In this way, when the foot rest assembly 3 and the second leg rest 2 are extended and retracted relative to the first leg rest 1, no step surface is generated between the foot rest assembly 3 and the second leg rest 2, thereby preventing the step surface from colliding with the first leg rest 1.

[0064] The embodiment of the present application provides a car seat, including the leg support adjustment mechanism in the above embodiment. With such a configuration, the driving action output by the flip drive member 4 can be transmitted to the foot support assembly 3 in one direction through the configuration of the flip transmission structure 5, and the action on the foot support assembly 3 can be prevented from being transmitted to the flip drive member 4. The structural stability is good, which is conducive to locking the foot support assembly 3 at multiple different flip angles to meet the use requirements of different users.

[0065] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0066] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0067] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0068] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0069] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0070] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A leg support adjustment mechanism, characterized in that: include: Leg rest assembly; A foot support assembly, reversibly connected to the leg support assembly; A flip driving assembly, connected to the leg rest assembly and the foot rest assembly, and capable of driving the foot rest assembly to flip relative to the leg rest assembly; Wherein, the flip driving assembly includes a flip driving member and a flip transmission structure, the flip driving member is connected to the leg rest assembly, and the flip transmission structure can only transmit the driving action of the flip driving member to the foot rest assembly.

2. The leg support adjustment mechanism according to claim 1, characterized in that: The flip transmission structure comprises: A first screw-nut pair having a screw portion and a nut portion; Wherein, the nut part is transmission connected to the flip driving member, and the screw part is transmission connected to the foot support assembly.

3. The leg support adjustment mechanism according to claim 2, characterized in that: The flip transmission structure comprises: Turn the gear and the sector gear plate to mesh and connect them; Wherein, the flip gear is connected to the flip shaft of the footrest assembly and can drive the footrest assembly to flip; the fan-shaped tooth plate is rotatably connected to the legrest assembly and is transmission-connected to the lead screw part.

4. The leg support adjustment mechanism according to claim 3, characterized in that: The lead screw part is connected to the sector tooth plate through a swinging member, the first end of the swinging member is connected to the sector tooth plate and can rotate coaxially with the sector tooth plate; the second end of the swinging member is hinged to the lead screw part.

5. The leg support adjustment mechanism according to claim 3, characterized in that: The leg support assembly is provided with a mounting seat, the flip gear and the sector-shaped tooth plate are arranged in the mounting seat, and the mounting seat is provided with a mounting hole for the flip shaft to pass through.

6. The leg support adjustment mechanism according to claim 1, characterized in that: The leg support assembly comprises: The first leg support and the second leg support are slidably connected to the first leg support; and the first leg support and the second leg support are connected with a telescopic driving component to drive the The second leg support is telescopic relative to the first leg support; Among them, the telescopic driving assembly includes a telescopic driving member and a telescopic transmission structure, the telescopic driving member is connected to the first leg support, the telescopic transmission structure is connected to the first leg support and the second leg support, and can amplify the driving stroke of the telescopic driving member.

7. The leg support adjustment mechanism according to claim 6, characterized in that: The telescopic transmission structure comprises: The first connecting rod and the second connecting rod are cross-arranged and hinged at the intersection; Among them, the first connecting rod and the second connecting rod both have a power end and a resistance end, and the distance between the power end and the intersection position is smaller than the distance between the resistance end and the intersection position; the telescopic driving component can drive the two power ends to move closer and farther away, and the two resistance ends moving closer and farther away can drive the second leg rest to extend and retract relative to the first leg rest.

8. The leg support adjustment mechanism according to claim 7, characterized in that: The telescopic transmission structure comprises: a third connecting rod and a fourth connecting rod, wherein the first end of the third connecting rod and the first end of the fourth connecting rod are hinged at a first position on the first leg support, the second end of the third connecting rod is hinged to the power end of the first connecting rod, and the second end of the fourth connecting rod is hinged to the power end of the second connecting rod; A fifth connecting rod and a sixth connecting rod, wherein the first end of the fifth connecting rod and the first end of the sixth connecting rod are hinged at a second position on the second leg support, the second end of the fifth connecting rod is hinged to the resistance end of the first connecting rod, and the second end of the sixth connecting rod is hinged to the resistance end of the second connecting rod; Wherein, the telescopic driving member is connected to the intersection position and can drive the intersection position to approach and move away from the first position.

9. The leg support adjustment mechanism according to claim 6, characterized in that: The telescopic driving member is transmission-connected to the telescopic transmission structure via a second screw nut pair.

10. The leg support adjustment mechanism according to claim 1, characterized in that: The leg support assembly comprises: A first leg support and a second leg support, wherein the second leg support is slidably connected to the inner side of the first leg support; The footrest assembly can be flipped to the side of the second leg rest and hidden in the first leg rest along with the second leg rest.

11. The leg support adjustment mechanism according to claim 10, characterized in that: A receiving groove is provided on the side of the second leg rest, and the foot rest assembly can be embedded in the receiving groove and be flush with the side of the second leg rest.

12. A car seat, comprising a leg support adjustment mechanism, characterized in that: The leg rest adjustment mechanism is the leg rest adjustment mechanism described in any one of claims 1-11.

Images