Zero-gravity large-stroke leg support

Abstract

The utility model belongs to the field of automobile leg supports, and particularly relates to a zero-gravity large-stroke leg support which comprises a motor support, a first lead screw motor is installed on the motor support, a hinge piece is hinged to the output end of the first lead screw motor, the hinge piece is fixedly connected with a balance push rod, and the two ends of the balance push rod are each hinged to a connecting rod assembly. The connecting rod assembly is connected with a bearing platform, a pedal is arranged on the upper side face of the bearing platform through a sliding rail assembly, a second lead screw motor is installed below the pedal, the output end of the second lead screw motor is connected with the bearing platform, the lead screw motor pushes the connecting rod structure to enable the bearing platform and the pedal to be lifted, and the second lead screw motor is installed below the pedal. A lead screw is fixed to the output end of the second lead screw motor, the lead screw is in threaded connection with the bearing platform, the pedal is driven by the second lead screw motor to automatically stretch out, and therefore four-direction adjustment is achieved, and the four-direction adjusting mechanism has the advantages of being large in folding and unfolding stroke, small in occupied space, high in stability and low in unfolding noise.

Description

Technical Field

[0001] The utility model belongs to the field of automobile leg rests, in particular to a zero-gravity long-stroke leg rest. Background Art

[0002] Among the currently available leg support mechanisms for car seats, most are two-way leg support mechanisms that can only be unfolded and cannot be further extended after unfolding, so that the passenger's calf cannot be fully supported, resulting in poor comfort and a poor experience.

[0003] To address this technical problem, some structures in which the leg rests can move forward and backward have appeared on the market, so that the leg rests can be lifted and moved forward and backward at the same time to achieve four-way adjustment.

[0004] For example, the new multifunctional leg rest disclosed in the Chinese invention patent with patent publication number CN115027337A, the leg rest can be moved forward and backward and is arranged on the lower slide, and a guide structure is provided between the corresponding leg rest and both sides of the lower slide, and a concave cavity is provided in the middle of the lower slide, and synchronous wheels arranged front and back are provided in the concave cavity, and a synchronous belt is wound around the synchronous wheel, and a first power source is provided. The first power source is used in conjunction with the guide structure arranged on both sides of the lower slide to realize the forward and backward movement of the leg rest, but the existing leg rest has a small movement stroke, and simply extending the length of the hinged rod will occupy a larger space, and it is unstable and easy to shake after unfolding, resulting in a poor user experience, so a zero-gravity large-stroke leg rest is needed. Utility Model Content

[0005] In response to the above problems, the present utility model proposes a zero-gravity long-stroke leg rest, which effectively solves the problems in the prior art that the leg rest occupies a large space when retracted, is unstable and easily shakes when folded or unfolded, thereby resulting in poor user experience.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a zero-gravity long-stroke leg rest, comprising a motor bracket, a screw motor 1 is installed on the motor bracket, the output end of the screw motor 1 is hinged with a hinge, the hinge is fixedly connected to a balance push rod, the two ends of the balance push rod are respectively hinged with a group of connecting rod assemblies, the connecting rod assembly is connected to a supporting platform, the upper side of the supporting platform is provided with a pedal through a slide rail assembly, a screw motor 2 is installed under the pedal, the output end of the screw motor 2 is fixed with a screw, and the screw is threadedly connected to the supporting platform.

[0007] Furthermore, the slide rail assembly includes multiple slides opened on the pedal, a support plate is fixed on the supporting platform, a placement groove is opened on the support plate, a bolt 2 is threadedly connected to the placement groove, a matching column for limiting the left and right shaking of the pedal is sleeved on the bolt 2, the pedal is set on the supporting platform through the matching sliding of the matching column and the slide, and a pressure plate is fixed on the bolt 2.

[0008] Furthermore, the support plate is in a mountain shape, and contact blocks are fixed to the upper ends of both sides of the support plate, and the contact blocks support the pedal.

[0009] Furthermore, the connecting rod assembly includes an articulated rod one and an articulated rod two, which are respectively hinged on the sides of the motor bracket, and the articulated rod one and the articulated rod two are respectively hinged with an articulated rod three and an articulated rod four, and the articulated rod three and the articulated rod four are connected to the balancing push rod, and the articulated rod three and the articulated rod four are respectively hinged with an articulated rod five and an articulated rod six, and the articulated rod five is hinged with an articulated rod seven, and the articulated rod six and the articulated rod seven are both hinged on the supporting platform.

[0010] Furthermore, the articulated rod one and articulated rod three, articulated rod two and articulated rod four, articulated rod three and articulated rod four, articulated rod three and articulated rod five, articulated rod five and articulated rod seven, articulated rod four and articulated rod six, articulated rod six and the supporting platform, and articulated rod seven and the supporting platform are all connected through articulated assemblies, and the supporting platform and the pedal can be extended obliquely upward through the connecting rod assembly, and at the same time cooperate with the pedal slidably connected to the supporting platform to achieve four-way adjustment.

[0011] Furthermore, the hinge assembly includes a stud, two receiving rings are provided on the stud, a sleeve is clamped between the two receiving rings, wear-resistant sleeves are fixed to both ends of the sleeve and are close to the receiving rings, and the other end of the stud is tightly threaded with a nut that is close to the receiving ring, and the hinge assembly is connected to the connecting rod assembly through the receiving ring.

[0012] Furthermore, the hinged rod one, hinged rod three, hinged rod five and hinged rod seven are all rotatably arranged on a receiving ring near one end of the stud head, and the hinged rod two, hinged rod four and hinged rod six are all rotatably arranged on a receiving ring near one end of the nut.

[0013] Furthermore, two limit blocks are provided on the left and right sides of the motor bracket, and the two limit blocks are used to limit the rotation angles of the hinge rod 1 and the hinge rod 2 respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The utility model forms a structure for long-distance retraction of the supporting platform by cooperating with the connecting rod assembly, the supporting platform, the screw motor and the balancing push rod, which facilitates the long-distance deployment and folding of the supporting platform. Moreover, the connecting rod assembly can retract the supporting platform to the maximum extent, thereby reducing the occupied space after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the main view of the structure of the utility model;

[0018] Figure 3 This is a structural diagram of the slide rail assembly of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the hinge assembly of the utility model;

[0020] Figure 5 For this utility model Figure 1 Enlarged schematic diagram of point A in the middle.

[0021] In the figure: 1-motor bracket, 2-screw motor 1, 3-hinge, 4-balance push rod, 5-support platform, 6-pedal, 7-screw motor 2, 8-slide, 9-support plate, 10-placement slot, 11-bolt 2, 12-matching column, 13-pressure plate, 14-contact block, 15-hinge rod 1, 16-hinge rod 2, 17-hinge rod 3, 18-hinge rod 4, 19-hinge rod 5, 20-hinge rod 6, 21-hinge rod 7, 22-stud, 23-support ring, 24-sleeve, 25-wear-resistant sleeve, 26-nut, 29-limit block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-Figure 5As shown, a zero-gravity long-stroke leg support includes a motor bracket 1, a screw motor 2 is installed on the motor bracket 1, the output end of the screw motor 2 is hinged with a hinge 3, the hinge 3 is fixedly connected to a balancing push rod 4, and the two ends of the balancing push rod 4 are respectively hinged with a group of connecting rod assemblies, and the connecting rod assembly is connected to a supporting platform 5. The upper side of the supporting platform 5 is provided with a pedal 6 through a slide rail assembly, and a screw motor 2 7 is installed below the pedal 6. The output end of the screw motor 2 7 is fixed with a screw, and the screw is threadedly connected to the supporting platform 5. The hinge 3 is driven to move by running the screw motor 2, and the hinge 3 pushes the balancing push rod 4 to drive the connecting rod assembly to move, and the extension and contraction of the screw motor 2 is controlled. The expansion or retraction of the control connecting rod assembly is controlled, thereby controlling the expansion and retraction of the supporting platform 5, and the extension and retraction of the pedal 6 is controlled by controlling the screw motor 27, and the screw motor 27 is installed on the front side of the pedal 6, so the center of gravity can be placed on the front side of the pedal 6. The operation of the screw motor 27 drives the screw to rotate, thereby driving the pedal to move on the slide rail assembly. The pedal 6 moves on the supporting platform 5 through the slide rail assembly, thereby reducing the noise generated by the screw motor 27, and making the pedal 6 run more stably, improving the user experience. Two support rods are fixed on the motor bracket 1, and a mounting plate is provided on the two support rods. The screw motor 12 is fixed on the mounting plate. Through this design, the screw motor 12 can be set in the middle position, which can push the two connecting rod assemblies more evenly.

[0024] In this embodiment, the slide rail assembly includes a plurality of slideways 8 provided on the pedal 6, a support plate 9 is fixed on the supporting platform 5, a placement groove 10 is provided on the support plate 9, a second bolt 11 is connected to the internal thread of the placement groove 10, and a matching column 12 for limiting the left and right shaking of the pedal 6 is sleeved on the second bolt 11. The pedal 6 is slidably provided on the supporting platform 5 through the matching column 12 and the slideway 8, and a pressure plate 13 is fixed on the second bolt 11;

[0025] When in use, the second bolt 11 and the matching column 12 are threaded through the slide 8 and connected to the placement groove 10 on the support plate 9. The second bolt 11 is tightened, the pressure plate 13 is lowered, and the pressure plate 13 presses the pedal 6, so that the pedal 6 and the support plate 9 fit together. The diameter of the matching column 12 is the same as the width of the slide 8. When the pedal 6 moves, the slide 8 on the pedal will stick to the matching columns 12 on the left and right sides. When the pedal 6 moves left and right, it cannot shake in the front and back directions, thereby improving the stability of the movement of the pedal 6.

[0026] In this embodiment, the support plate 9 is in a mountain shape, and contact blocks 14 are fixed to the upper ends of both sides of the support plate 9. Through the contact blocks 14, the contact blocks 14 lift the pedal 6, reducing the contact area between the pedal 6 and the support plate 9, reducing friction, and making the pedal 6 move more smoothly.

[0027] In this embodiment, the connecting rod assembly includes an articulated rod 15 and an articulated rod 2 16 respectively hinged on the side of the motor bracket 1, and the articulated rod 1 15 and the articulated rod 2 16 are respectively hinged with an articulated rod 3 17 and an articulated rod 4 18, and the articulated rod 3 17 and the articulated rod 4 18 are connected to the balancing push rod 4, and the articulated rod 3 17 and the articulated rod 4 18 are respectively hinged with an articulated rod 5 19 and an articulated rod 6 20, and the articulated rod 5 19 is hinged with an articulated rod 7 21, and the articulated rod 6 20 and the articulated rod 7 21 are both hinged to the supporting platform 5.

[0028] In this embodiment, the articulated rod 15 and the articulated rod 3 17, the articulated rod 2 16 and the articulated rod 4 18, the articulated rod 3 17 and the articulated rod 4 18, the articulated rod 3 17 and the articulated rod 5 19, the articulated rod 5 19 and the articulated rod 7 21, the articulated rod 4 18 and the articulated rod 6 20, the articulated rod 6 20 and the supporting platform 5, and the articulated rod 7 21 and the supporting platform 5 are all connected through an articulated assembly. By connecting through the articulated assembly and designing more connecting rods, the moving distance of the supporting platform 5 can be expanded, and the supporting platform 5 can be moved farther. Moreover, the connecting rod assembly of this design sends the supporting platform 5 forward and downward, and can also be extended to a farther distance, which can better enable passengers to spread their legs and improve passenger comfort.

[0029] In this embodiment, the hinge assembly includes a stud 22, two receiving rings 23 are sleeved on the stud 22, a sleeve 24 is clamped between the two receiving rings 23, and wear-resistant sleeves 25 that are close to the receiving rings 23 are fixed at both ends of the sleeve 24. The other end of the stud 22 is tightly threaded with a nut 26 that is close to the receiving ring 23. The hinge assembly is connected to the connecting rod assembly through the receiving ring 23.

[0030] In this embodiment, the hinge rod 15, hinge rod 3 17, hinge rod 5 19 and hinge rod 7 21 are all rotatably mounted on a receiving ring 23 near one end of the head of the stud 22, and the hinge rod 2 16, hinge rod 4 18 and hinge rod 6 20 are all rotatably mounted on a receiving ring 23 near one end of the nut 26.

[0031] The two receiving rings 23, two wear-resistant sleeves 25 and a sleeve 24 are fixed by tightening the nut 26. When they need to be removed, they can be quickly disassembled by loosening the nut 26. In addition, the length of the sleeve 24 is greater than the combined thickness of the bolt head, the wear-resistant sleeve 25 and the receiving ring 23. When the connecting rod assembly is folded, the end of each connecting rod is located directly above the middle of the sleeve 24 in the lower hinge assembly, so as to maximize the folding distance of the connecting rod assembly. When the connecting rod assembly is folded, the design of the sleeve 24 in the hinge assembly can make multiple hinged rods folded more tightly, with a smaller distance between them, thereby reducing the space occupied by folding.

[0032] In this embodiment, two limit blocks 29 are provided on the left and right sides of the motor bracket 1. The two limit blocks 29 are respectively used to limit the rotation angle of the hinge rod 15 and the hinge rod 2 16. When the connecting rod assembly is fully unfolded, the two limit blocks 29 will respectively limit the clockwise rotation of the hinge rod 15 and limit the counterclockwise rotation of the hinge rod 2 16, thereby forming a rotation limit and forming a support for the hinge rod 2 16 to prevent the leg rest from being pressed down and shaking.

[0033] When the utility model is in use, the balance push rod 4 is pushed forward by the screw motor 1 2, and the balance push rod 4 drives the hinged connecting rod assembly to move the supporting platform 5 obliquely downward. During movement, the pedal 6 can be driven by the screw motor 2 7 to extend forward or move backward from the supporting platform 5, so as to realize the movement of the pedal 6 in four directions: up, down, front and back.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A zero-gravity long-travel leg support, characterized by: It includes a motor bracket, on which a screw motor 1 is installed, the output end of the screw motor 1 is hinged with a hinge, the hinge is fixedly connected to a balancing push rod, the two ends of the balancing push rod are respectively hinged with a group of connecting rod assemblies, the connecting rod assembly is connected to a supporting platform, the upper side of the supporting platform is provided with a pedal through a slide rail assembly, a screw motor 2 is installed under the pedal, the output end of the screw motor 2 is fixed with a screw, and the screw is threadedly connected to the supporting platform.

2. The zero-gravity long-travel leg support according to claim 1, characterized in that: The slide rail assembly includes multiple slides opened on the pedal, a support plate is fixed on the supporting platform, a placement groove is opened on the support plate, a second bolt is threadedly connected to the placement groove, a matching column for limiting the left and right shaking of the pedal is sleeved on the second bolt, the pedal is set on the supporting platform through the matching sliding of the matching column and the slide, and a pressure plate is fixed on the second bolt.

3. The zero-gravity long-travel leg support according to claim 2, characterized in that: The supporting plate is in a mountain shape, and contact blocks are fixed to the upper ends of both sides of the supporting plate, and the contact blocks support the pedals.

4. The zero-gravity long-travel leg support according to claim 2, characterized in that: The connecting rod assembly includes an articulated rod 1 and an articulated rod 2 respectively hinged on the sides of the motor bracket, and the articulated rod 1 and the articulated rod 2 are respectively connected to the articulated rod 3 and the articulated rod 4, and the articulated rod 3 and the articulated rod 4 are connected to the balancing push rod, and the articulated rod 3 and the articulated rod 4 are respectively hinged to the articulated rod 5 and the articulated rod 6, and the articulated rod 5 is hinged to the articulated rod 7, and the articulated rod 6 and the articulated rod 7 are both hinged on the supporting platform.

5. The zero-gravity long-travel leg support according to claim 4, characterized in that: The articulated rod 1 and articulated rod 3, articulated rod 2 and articulated rod 4, articulated rod 3 and articulated rod 4, articulated rod 3 and articulated rod 5, articulated rod 5 and articulated rod 7, articulated rod 4 and articulated rod 6, articulated rod 6 and the supporting platform, and articulated rod 7 and the supporting platform are all connected through articulated components.

6. The zero-gravity long-travel leg support according to claim 5, characterized in that: The hinge assembly includes a stud, two receiving rings are provided on the stud, a sleeve is clamped between the two receiving rings, wear-resistant sleeves are fixed on both ends of the sleeve and are close to the receiving rings, and the other end of the stud is tightly threadedly connected to a nut close to the receiving ring. The hinge assembly is connected to the connecting rod assembly through the receiving ring.

7. The zero-gravity long-travel leg support according to claim 6, characterized in that: The hinged rod one, hinged rod three, hinged rod five and hinged rod seven are all rotatably arranged on a receiving ring near one end of the stud head, and the hinged rod two, hinged rod four and hinged rod six are all rotatably arranged on a receiving ring near one end of the nut.

8. The zero-gravity long-travel leg support according to claim 7, characterized in that: Two limit blocks are provided on the left and right sides of the motor bracket, and the two limit blocks are used to limit the rotation angles of the hinge rod 1 and the hinge rod 2 respectively.

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