Buckle type leg support

Abstract

The utility model relates to the technical field of automobile accessories, and particularly discloses a buckle type leg support, which comprises a leg support fixing piece, a buckle type leg support and a buckle type leg support, the leg supporting plate is used for supporting legs and / or feet of a human body; the hand-driven buckle assembly is mounted on the leg supporting plate; one end of the tension spring connecting rod assembly is hinged to the leg support fixing piece, and the other end of the tension spring connecting rod assembly is connected with the leg supporting plate through the hand-driven buckle assembly; wherein the leg supporting plate is in a storage state that the leg supporting plate is kept close to the position of the leg support fixing piece under the clamping and limiting effects of the hand-driven buckle assembly and the tension spring connecting rod assembly; in the extending state, after the limiting effect of the hand-driven buckle assembly is relieved, the leg support fixing piece rotates in the direction away from the leg support fixing piece. According to the buckle type leg support, the leg support can be conveniently stretched out and stored through mechanical design, cost is effectively reduced, and reliability and user experience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile products, especially to a buckle type leg rest. BACKGROUND

[0002] In view of the rapid development of the automobile industry and the high pursuit of driving comfort by consumers, the configuration of automobile seats is increasingly diversified, and the leg rest, as an important component to improve the riding experience, has been applied in many high-end vehicles. However, the traditional electric leg rest has a complex structure and high cost of motor and control system, which not only increases the production burden of manufacturers, but also raises the threshold for consumers to purchase cars. At the same time, the failure risk and maintenance requirements of electric devices also bring inconvenience to users.

[0003] In view of this, the utility model emerges as the times require, aiming to launch a brand-new leg rest structure that does not rely on electric devices and can realize easy extension and retraction of the leg rest through mechanical design only. This design not only significantly reduces the cost, but also greatly improves the reliability of the system and the user experience.

[0004] The above information disclosed in the background section is only included to enhance the understanding of the background of the present disclosure, and therefore can contain information that is not prior art known to those of ordinary skill in the art at the present time. SUMMARY

[0005] One object of the utility model is to provide a buckle type leg rest that can realize convenient extension and storage of the leg rest through mechanical design, effectively reduce the cost, and improve the reliability and user experience.

[0006] To achieve the above object, the utility model provides a buckle type leg rest, which comprises:

[0007] A leg rest fixing member for connecting with a seat body;

[0008] A leg supporting plate for supporting the legs and feet of a human body;

[0009] A hand-driven buckle assembly installed on the leg supporting plate;

[0010] A tension spring linkage assembly having one end hinged to the leg rest fixing member and the other end connected to the leg supporting plate through the hand-driven buckle assembly;

[0011] The leg supporting plate is in a storage state kept in a position close to the leg supporting fixing member by the clamping and limiting action of both the hand-driven clasp assembly and the tension spring connecting rod assembly, and is in an extension state rotated away from the leg supporting fixing member by the elastic tension of the tension spring connecting rod assembly after the limiting action of the hand-driven clasp assembly is released.

[0012] Optionally, the hand-driven clasp assembly comprises:

[0013] A clasp base is fixed to the bottom of the leg supporting plate.

[0014] A rotating clasp plate is rotationally connected to one end of the clasp base and has a U-shaped clamping groove in the end face of the other end for clamping the tension spring connecting rod assembly; wherein a first positioning groove is arranged on the side of the rotating clasp plate, and a second positioning groove is arranged on the side of the rotating clasp plate away from the U-shaped clamping groove.

[0015] A limiting rotating plate is arranged on the side of the rotating clasp plate.

[0016] A clasp plate torsion spring is connected to the rotating clasp plate and the clasp base respectively, and is used to drive the rotating clasp plate to rotate towards the limiting rotating plate to abut against the limiting rotating plate.

[0017] A rotating plate torsion spring is connected to the limiting rotating plate and the clasp base respectively, and is used to drive the limiting rotating plate to rotate towards the rotating clasp plate to clamp into the first positioning groove or the second positioning groove, so as to limit the forward rotation of the rotating clasp plate.

[0018] An unlocking rotating rod is rotationally connected to the clasp base and penetrates through the limiting rotating plate; wherein the limiting rotating plate is synchronously rotationally connected to the unlocking rotating rod, and is used to drive the limiting rotating plate to rotate away from the rotating clasp plate after being driven, so as to release the forward rotation limitation of the rotating clasp plate.

[0019] Optionally, when the limiting rotating plate clamps into the first positioning groove, the U-shaped clamping groove is in a vertical state with the opening facing vertically to the leg supporting plate, so as to clamp or release the tension spring connecting rod assembly from the U-shaped clamping groove.

[0020] When the limiting rotating plate clamps into the second positioning groove, the U-shaped clamping groove is in a parallel state with the opening facing parallel to the leg supporting plate, so as to limit the tension spring connecting rod assembly from releasing the U-shaped clamping groove.

[0021] Optionally, the unlocking rotating rod comprises:

[0022] a rotating cap located on the outside of the leg supporting plate;

[0023] a rotating rod body, one end of which is rotatably connected with the buckle base and extends to the limiting rotating plate, and the other end of which extends to be fixed with the rotating cap.

[0024] Optionally, the buckle base is provided with a limiting bolt, and the limiting rotating plate is provided with a strip-shaped limiting slot through which the limiting bolt passes.

[0025] Optionally, the pull spring linkage assembly comprises:

[0026] a first three-rotating member, which is provided with a first rotating shaft, a second rotating shaft and a third rotating shaft arranged in a triangle; wherein the leg supporting member is hingedly connected with the first three-rotating member through the first rotating shaft;

[0027] a first double-rotating member, one end of which is hingedly connected with the first three-rotating member through the second rotating shaft;

[0028] a second double-rotating member, which is hingedly connected with the first three-rotating member through the third rotating shaft; wherein the second double-rotating member is provided with a cross beam portion for being connected to the leg supporting plate;

[0029] a second three-rotating member, one end of which is hingedly connected with the other end of the first double-rotating member, and the middle portion of which is hingedly connected with the second double-rotating member;

[0030] a third double-rotating member, one end of which is hingedly connected with the other end of the second three-rotating member, and the other end of which is hingedly connected with the buckle base;

[0031] a limiting clamping rod, which is installed on the third double-rotating member and is used for being clamped into the U-shaped clamping slot when the leg supporting plate is rotated to the storage state, so as to limit the outward rotation of the leg supporting plate;

[0032] a first linkage pull spring, one end of which is connected with the leg supporting member, and the other end of which is connected with the second double-rotating member, for driving the cross beam portion to rotate downward around the third rotating shaft, so that the second three-rotating member cooperates with the second rotating shaft to pull the first double-rotating member from both ends;

[0033] a second linkage pull spring, one end of which is connected with the cross beam portion, and the other end of which is connected with the third double-rotating member close to one end of the second three-rotating member, for driving the mutually hingedly connected ends of the third double-rotating member and the second three-rotating member to rotate toward the cross beam portion, so that the leg supporting plate is rotated outward relative to the leg supporting member to the extended state.

[0034] Optionally, the crossbeam part and the leg support plate are rotationally connected through a hinge assembly.

[0035] Optionally, the leg support fixing part is provided with a thrust surface for providing support to the second double-rotation part to limit the crossbeam part from continuing to rotate downward.

[0036] Optionally, the second double-rotation part is provided with a resistance-reducing roller corresponding to the position of the thrust surface for abutting against the thrust surface.

[0037] The leg support has the following working process:

[0038] (1) Storage state:

[0039] In the initial state, the leg support plate is in the storage position, i.e., close to the leg support fixing part.

[0040] At this time, the hand-driven buckle assembly limits the leg support plate to keep it stable and not rotate randomly.

[0041] (2) Release the limit:

[0042] When the user needs to use the leg support, the hand-driven buckle assembly is manually operated to release the limit on the leg support plate.

[0043] (3) Extension process:

[0044] Once the limit is released, the elastic tension of the tension spring connecting rod assembly starts to work.

[0045] Under the action of the elastic tension, the leg support plate gradually rotates away from the leg support fixing part until it reaches the predetermined extension position.

[0046] (4) Use state:

[0047] After the leg support plate is fully extended, it provides stable support for the user's legs and / or feet.

[0048] (5) Retracting process:

[0049] When the user needs to retract the leg support, press the leg support plate to rotate it towards the leg support fixing part until it returns to the position close to the leg support fixing part, so that the leg support plate returns to the storage state.

[0050] Therefore, the buckle type leg support provided by the utility model has the advantages that the mechanical design of the hand-driven buckle assembly cooperates with the tension spring connecting rod assembly, the leg supporting plate can be conveniently stretched out and stored without electric equipment, cost is reduced, reliability and user experience are improved, meanwhile, the structure is simple, maintenance is more convenient, and user use annoyance is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0052] Figure 1 The structural schematic diagram of the buckle type leg support in the stretched-out state is provided for the embodiment;

[0053] Figure 2 The Figure 1 explosion schematic diagram;

[0054] Figure 3 The internal schematic diagram of the buckle type leg support in the stretched-out state is provided for the embodiment;

[0055] Figure 4 The Figure 3 partial enlarged schematic diagram of A in the embodiment;

[0056] Figure 5 The structural schematic diagram of the buckle type leg support in the stored state is provided for the embodiment.

[0057] In the drawings:

[0058] 1, leg support fixing part;101, thrust surface;

[0059] 2, leg supporting plate;

[0060] 3, hand-driven buckle assembly;301, buckle base;3011, limit pin;302, rotating clamping plate;3021, U-shaped clamping groove;3022, first positioning groove;3023, second positioning groove;303, limit rotating plate;3031, strip-shaped limit groove;304, unlocking rotating rod;3041, rotating cap;3042, rotating rod body;305, clamping plate torsional spring;306, rotating plate torsional spring;

[0061] 4. A pull spring linkage assembly; 401. A first three-turn piece; 402. A first double-turn piece; 403. A second double-turn piece; 4031. A crossbeam part; 404. A second three-turn piece; 405. A third double-turn piece; 406. A first linkage pull spring; 407. A second linkage pull spring; 408. A first rotating shaft; 409. A second rotating shaft; 410. A third rotating shaft; 411. A limiting clamping rod; 412. A hinge assembly; 413. A resistance-reducing roller. DETAILED DESCRIPTION

[0062] In the present application, the term “embodiment” mentioned in the present application means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term “embodiment” appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0063] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0064] In the description of the present application, the phrase “and / or” is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character “ / ” herein generally represents that the associated objects before and after are a “or” logical relationship.

[0065] In the present application, terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0066] In the present application, without more limitation, the “including”, “containing”, “having” or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0067] As the same as the understanding in the "Examination Guidelines", in the utility model, "greater than", "less than", "exceed" and the like are understood as not including the number; "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the utility model, the meaning of "multiple" is two or more (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0068] In the description of the embodiments of the utility model, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the utility model or for the reader to understand, and do not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model.

[0069] Unless otherwise explicitly specified or limited, in the description of the embodiments of the utility model, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art to which the utility model belongs, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0070] Referring to Figures 1-5 , the utility model provides a buckle type leg support, comprising:

[0071] The leg support fixing part 1 is used for connecting with the seat body;

[0072] The leg support plate 2 is used for supporting the leg and / or foot of the human body;

[0073] The hand-driven buckle assembly 3 is installed on the leg support plate 2;

[0074] One end of the tension spring connecting rod assembly 4 is hinged with the leg support fixing part 1, and the other end is connected with the leg support plate 2 through the hand-driven buckle assembly 3;

[0075] The leg supporting plate 2 is in a storage state close to the leg supporting fixture 1 under the clamping and limiting effect of both the hand-driven buckle assembly 3 and the tension spring linkage assembly 4, and is in an extended state rotating away from the leg supporting fixture 1 under the elastic tension of the tension spring linkage assembly 4 after the limiting effect of the hand-driven buckle assembly 3 is released.

[0076] The buckle type leg supporting device provided by the embodiment has the following overall working process:

[0077] (1) Storage state:

[0078] In the initial state, the leg supporting plate 2 is in the storage position, i.e., close to the leg supporting fixture 1.

[0079] At this time, the hand-driven buckle assembly 3 limits the leg supporting plate 2, so that it remains stable and does not rotate randomly.

[0080] (2) Release the limit:

[0081] When the user needs to use the leg supporting device, the hand-driven buckle assembly 3 is manually operated to release the limiting effect on the leg supporting plate 2.

[0082] (3) Extension process:

[0083] Once the limiting effect is released, the elastic tension of the tension spring linkage assembly 4 begins to play a role.

[0084] Under the action of the elastic tension, the leg supporting plate 2 gradually rotates away from the leg supporting fixture 1 until it reaches the predetermined extended position.

[0085] (4) Use state:

[0086] After the leg supporting plate 2 is fully extended, it provides stable support for the user's legs and / or feet.

[0087] (5) Retracting process:

[0088] When the user needs to retract the leg supporting device, press the leg supporting plate 2 to rotate it towards the leg supporting fixture 1 to the position close to the leg supporting fixture 1, so that the leg supporting plate 2 returns to the storage state. At this time, the hand-driven buckle assembly 3 acts again to limit the leg supporting plate 2, ensuring that the leg supporting device is stable and does not move.

[0089] Therefore, the buckle type leg support provided by the utility model has the advantages that the mechanical design of the hand-driven buckle assembly 3 cooperates with the tension spring connecting rod assembly 4, the leg supporting plate 2 can be conveniently extended and stored without electric equipment, the cost is reduced, the reliability and user experience are improved, the structure is simple, the maintenance is more convenient, and the use annoyance of the user is reduced.

[0090] In the embodiment, the hand-driven buckle assembly 3 comprises:

[0091] The buckle base 301 is fixedly arranged at the bottom of the leg supporting plate 2.

[0092] The rotating clamping plate 302 is rotationally connected to one end of the buckle base 301, and the other end is provided with a U-shaped clamping groove 3021 for clamping the tension spring connecting rod assembly 4; wherein the side surface of the rotating clamping plate 302 is provided with a first positioning groove 3022 and a second positioning groove 3023 located on the side of the first positioning groove 3022 away from the U-shaped clamping groove 3021.

[0093] The limiting rotating plate 303 is located on the side surface of the rotating clamping plate 302.

[0094] The clamping plate torsional spring 305 is connected to the rotating clamping plate 302 and the buckle base 301 respectively, and is used for driving the rotating clamping plate 302 to rotate towards the positive direction close to the limiting rotating plate 303 and abut against the limiting rotating plate 303.

[0095] The rotating plate torsional spring 306 is connected to the limiting rotating plate 303 and the buckle base 301 respectively, and is used for driving the limiting rotating plate 303 to rotate towards the rotating clamping plate 302 and clamp into the first positioning groove 3022 or the second positioning groove 3023, so as to limit the positive rotation of the rotating clamping plate 302.

[0096] The unlocking rotating rod 304 is rotationally connected to the buckle base 301 and penetrates through the limiting rotating plate 303; wherein the limiting rotating plate 303 is synchronously rotationally connected to the unlocking rotating rod 304, and is used for driving the limiting rotating plate 303 to rotate away from the rotating clamping plate 302 after being driven, so as to release the positive rotation limitation of the rotating clamping plate 302.

[0097] Optionally, when the limiting rotating plate 303 clamps into the first positioning groove 3022, the U-shaped clamping groove 3021 is in a vertical state with the opening facing the vertical direction of the leg supporting plate 2, so that the tension spring connecting rod assembly 4 can clamp into or be separated from the U-shaped clamping groove 3021.

[0098] When the limiting rotating plate 303 is clamped into the second positioning groove 3023, the U-shaped clamping groove 3021 is in a parallel state with the opening facing the leg supporting plate 2, so as to limit the pull spring connecting rod assembly 4 from being separated from the U-shaped clamping groove 3021.

[0099] In the embodiment, the unlocking rotating rod 304 comprises a rotating cap 3041 and a rotating rod body 3042. The rotating cap 3041 is located outside the leg supporting plate 2; one end of the rotating rod body 3042 is rotationally connected with the buckle base 301 and extends to be inserted into the limiting rotating plate 303; the other end of the rotating rod body 3042 extends to be fixedly connected with the rotating cap 3041.

[0100] The buckle base 301 is provided with a limiting bolt 3011, and the limiting rotating plate 303 is provided with a strip-shaped limiting groove 3031 through which the limiting bolt 3011 passes. The strip-shaped limiting groove 3031 is mainly used to limit the rotation angle range of the limiting rotating plate 303.

[0101] It can be understood that when the rotating cap 3041 is twisted forward so that the unlocking boss abuts against the limiting rotating plate 303, the unlocking boss can overcome the torsional force of the rotating plate torsional spring 306 and drive the other end of the limiting rotating plate 303 to rotate to abut against the side boss, so that the rotating clamping plate 302 rotates away from the limiting rotating plate 303 and the limiting effect of the U-shaped clamping groove 3021 on the pull spring connecting rod assembly 4 is released.

[0102] After the rotating cap 3041 is loosened, the rotating plate torsional spring 306 drives the limiting rotating plate 303 to rotate to be clamped into the inner recessed notch, and the clamping plate torsional spring 305 drives the rotating clamping plate 302 to rotate back to the clamping position, so as to clamp the pull spring connecting rod assembly 4 again.

[0103] In the embodiment, the pull spring connecting rod assembly 4 comprises:

[0104] A first three-rotation piece 401, the first three-rotation piece 401 is provided with a first rotation shaft 408, a second rotation shaft 409 and a third rotation shaft 410 arranged in a triangle; wherein the leg supporting fixed piece 1 is hingedly connected with the first three-rotation piece 401 through the first rotation shaft 408;

[0105] A first double-rotation piece 402, one end of the first double-rotation piece 402 is hingedly connected with the first three-rotation piece 401 through the second rotation shaft 409;

[0106] A second double-rotation piece 403, the second double-rotation piece 403 is hingedly connected with the first three-rotation piece 401 through the third rotation shaft 410; wherein the second double-rotation piece 403 is provided with a cross beam portion 4031 for being connected to the leg supporting plate 2;

[0107] A second three-joint member 404, one end of which is hingedly connected to the other end of the first double-joint member 402, and the middle part of which is hingedly connected to the second double-joint member 403;

[0108] A third double-joint member 405, one end of which is hingedly connected to the other end of the second three-joint member 404, and the other end of which is hingedly connected to the buckle base 301;

[0109] A limiting clamping rod 411 is installed on the third double-joint member 405, and is used to be clamped into the U-shaped clamping groove 3021 when the leg supporting plate 2 is turned to the storage state, so as to limit the outward turning of the leg supporting plate 2. When the leg supporting plate 2 is gradually turned from the storage state to the extended state, the limiting clamping rod 411 drives the rotating clamping plate 302 to gradually turn from the parallel state to the vertical state, and the limiting clamping rod 411 just comes off the U-shaped clamping groove 3021 when the rotating clamping plate 302 turns to the vertical state. When the leg supporting plate 2 is gradually turned from the extended state to the storage state, the limiting clamping rod 411 first gradually approaches the notch of the U-shaped clamping groove 3021, and then drives the rotating clamping plate 302 to gradually turn from the vertical state to the parallel state after entering the U-shaped clamping groove 3021.

[0110] A first connecting rod tension spring 406, one end of which is connected to the leg supporting fixture 1, and the other end of which is connected to the second double-joint member 403, is used to drive the cross beam part 4031 to turn downward around the third rotating shaft 410, so that the second three-joint member 404 cooperates with the second rotating shaft 409 to pull the first double-joint member 402 from both ends;

[0111] A second connecting rod tension spring 407, one end of which is connected to the cross beam part 4031, and the other end of which is connected to the third double-joint member 405 close to one end of the second three-joint member 404, is used to drive the mutually hingedly connected ends of the third double-joint member 405 and the second three-joint member 404 to turn towards the cross beam part 4031, so that the leg supporting plate 2 turns outward relative to the leg supporting fixture 1 to the extended state.

[0112] Optionally, the cross beam part 4031 and the leg supporting plate 2 are connected by a hinge assembly 412. Further, the leg supporting fixture 1 is provided with a thrust surface 101 for providing support to the second double-joint member 403, so as to limit the continuous downward turning of the cross beam part 4031. The second double-joint member 403 is provided with a resistance-reducing roller 413 corresponding to the position of the thrust surface 101, which is used to abut against the thrust surface 101.

[0113] The buckle type leg support provided by the embodiment has the following detailed working process:

[0114] (1) Initial state (storage state):

[0115] The leg supporting plate 2 is in the storage position and close to the leg support fixing part 1.

[0116] At this time, the limiting clamping rod 411 is located in the U-shaped clamping groove 3021, the U-shaped clamping groove 3021 is in a parallel state, and the limiting rotating plate 303 is clamped into the second positioning groove 3023, so that the rotating clamping plate 302 cannot be rotated forward, thereby maintaining the storage state of the leg supporting plate 2.

[0117] Step 1: Release the limiting

[0118] The user manually operates the hand-driven clamping assembly 3, and the specific operation is to rotate the rotating cap 3041 to drive the unlocking rotating rod 304 to rotate.

[0119] After the limiting rotating plate 303 on the unlocking rotating rod 304 rotates, the limiting rotating plate 303 is separated from the second positioning groove 3023, and the rotating clamping plate 302 can be rotated forward, thereby releasing the limiting effect on the leg supporting plate 2.

[0120] Step 2: The leg supporting plate 2 starts to extend

[0121] Once the limiting effect is released, the first connecting rod spring 406 and the second connecting rod spring 407 of the spring connecting rod assembly 4 start to play a role.

[0122] The first connecting rod spring 406 drives the cross beam part 4031 (connected to the second double rotating part 403) to rotate downward, and at the same time, the second connecting rod spring 407 drives the leg supporting plate 2 to rotate outward.

[0123] Step 3: The leg supporting plate 2 is completely extended

[0124] Under the elastic force of the spring connecting rod assembly 4, the leg supporting plate 2 gradually rotates away from the leg support fixing part 1, and finally reaches the limit extension position when the resistance reducing roller 413 abuts against the thrust surface 101, at this time, it is in the extended state;

[0125] In this process, the limiting clamping rod 411 drives the rotating clamping plate 302 to gradually rotate from the parallel state to the vertical state, and the limiting clamping rod 411 just separates from the U-shaped clamping groove 3021 when the rotating clamping plate 302 rotates to the vertical state, and then with the continuous extension of the leg supporting plate 2, it is finally completely separated from the U-shaped clamping groove 3021;

[0126] When the limiting clamping rod 411 is completely separated from the U-shaped clamping groove 3021, the clamping plate torsional spring 305 and the rotating plate torsional spring 306 cooperate to make the limiting rotating plate 303 clamped into the first positioning groove 3022, so as to keep the vertical state of the U-shaped clamping groove 3021, so that the subsequent limiting clamping rod 411 can smoothly return to the U-shaped clamping groove 3021 when being stored.

[0127] (II) Use state:

[0128] The leg supporting plate 2 is completely extended to provide stable support for the user's legs and / or feet.

[0129] Step 4: retract the leg supporting plate 2

[0130] The user exerts pressure on the leg supporting plate 2 to rotate it towards the leg rest fixture 1.

[0131] Step 5: the leg supporting plate 2 returns to the storage position

[0132] Under the pressure exerted by the user, the leg supporting plate 2 drives the limiting clamping rod 411 to rotate towards the leg rest fixture 1.

[0133] In this process, the limiting clamping rod 411 first gradually approaches the slot of the U-shaped clamping groove 3021, and after entering the U-shaped clamping groove 3021, it drives the rotating clamping plate 302 to gradually rotate from the vertical state to the parallel state, and when the rotating clamping plate 302 returns to the parallel state, the limiting rotating plate 303 is clamped into the second positioning groove 3023, again maintaining the storage state.

[0134] Additional description:

[0135] During the entire working process, the thrust surface 101 on the leg rest fixture 1 provides support to limit the further downward rotation of the crossbeam part 4031.

[0136] The resistance-reducing roller 413 on the second double-rotating part 403 abuts against the thrust surface 101 to reduce frictional resistance, making the extension and retraction process of the leg supporting plate 2 more smooth.

[0137] Through the above orderly steps, the buckle type leg rest realizes the convenient extension and storage of the leg supporting plate 2 without the need for electric equipment, providing users with a comfortable and convenient use experience.

[0138] In summary, the buckle type leg rest provided in this embodiment has the following advantages:

[0139] ① Simple mechanical structure: through the cooperation of the hand-driven buckle assembly 3 and the tension spring connecting rod assembly 4, the extension and storage of the leg supporting plate 2 are realized, without the need for complex electric equipment, reducing cost and failure rate.

[0140] ② Easy to operate: the user only needs to manually operate the hand-driven buckle assembly 3 to easily realize the extension and storage of the leg supporting plate 2, which is convenient to use and improves the user experience.

[0141] ③ Good stability: in the storage state, the hand-driven buckle assembly 3 limits the leg supporting plate 2, ensuring its stability and avoiding accidental movement or shaking.

[0142] ④ Strong safety: the design of the limiting clamping rod 411 and the U-shaped clamping groove 3021 ensures the stability of the leg supporting plate 2 in the storage state, avoiding the safety hazards caused by accidental ejection.

[0143] Finally, it needs to be pointed out that although the above-mentioned embodiments have been described in the specification and drawings of the present application, it does not limit the patent protection scope of the present application. Any equivalent structure or equivalent flow replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A buckle-type leg rest, characterized by, The utility model relates to a leg rest fixing piece (1) for connecting with a seat body, a leg rest plate (2) for supporting the legs and feet of a human body, a hand-driven buckle assembly (3) mounted on the leg rest plate (2), and a tension spring linkage assembly (4) having one end hinged to the leg rest fixing piece (1) and the other end connected to the leg rest plate (2) through the hand-driven buckle assembly (3). The leg rest plate (2) is accommodated in a position close to the leg rest fixing piece (1) under the clamping and limiting action of the hand-driven buckle assembly (3) and the tension spring linkage assembly (4), and is extended away from the leg rest fixing piece (1) under the elastic tension of the tension spring linkage assembly (4) after the limiting action of the hand-driven buckle assembly (3) is released. The hand-driven buckle assembly (3) comprises a buckle base (301) fixed to the bottom of the leg rest plate (2), a rotating clamping plate (302) having one end rotatably connected to the buckle base (301) and the other end provided with a U-shaped clamping groove (3021) for clamping the tension spring linkage assembly (4), a limiting rotating plate (303) located at the side of the rotating clamping plate (302), a clamping plate torsion spring (305) having two force arms respectively connected to the rotating clamping plate (302) and the buckle base (301) for driving the rotating clamping plate (302) to rotate towards the limiting rotating plate (303) until abutting against the limiting rotating plate (303), a rotating plate torsion spring (306) having two force arms respectively connected to the limiting rotating plate (303) and the buckle base (301) for driving the limiting rotating plate (303) to rotate towards the rotating clamping plate (302) until clamped in the first positioning groove (3022) or the second positioning groove (3023) to limit the forward rotation of the rotating clamping plate (302), and an unlocking rotating rod (304) rotatably connected to the buckle base (301) and penetrating through the limiting rotating plate (303), wherein the limiting rotating plate (303) is synchronously rotatably connected to the unlocking rotating rod (304) for driving the limiting rotating plate (303) to rotate away from the rotating clamping plate (302) to release the forward rotation limitation of the rotating clamping plate (302) after being driven. ​ ​ ​ 2. The buckle-type leg rest according to claim 1, characterized by, ​ ​ ​ ​ ​ ​ ​ 3. The buckle-style leg rest of claim 2, wherein, When the limiting rotating plate (303) is clamped into the first positioning slot (3022), the U-shaped clamping slot (3021) is in a vertical state with the opening facing the leg supporting plate (2), so that the pull spring linkage assembly (4) is clamped into or separated from the U-shaped clamping slot (3021); When the limiting rotating plate (303) is clamped into the second positioning slot (3023), the U-shaped clamping slot (3021) is in a parallel state with the opening facing the leg supporting plate (2), so as to limit the pull spring linkage assembly (4) from being separated from the U-shaped clamping slot (3021).

4. The buckle-style leg rest of claim 3, wherein, The unlocking rotating rod (304) comprises: a rotating cap (3041) located outside the leg supporting plate (2); a rotating rod body (3042) having one end rotatably connected with the buckle base (301) and extending to be inserted into the limiting rotating plate (303), and the other end extending to be fixedly connected with the rotating cap (3041).

5. The buckle-style leg rest of claim 4, wherein, The buckle base (301) is provided with a limiting bolt (3011), and the limiting rotating plate (303) is provided with a strip-shaped limiting slot (3031) through which the limiting bolt (3011) passes.

6. The buckle-style leg rest of claim 2, wherein, The pull spring linkage assembly (4) comprises: a first three-rotation piece (401) provided with a first rotation shaft (408), a second rotation shaft (409) and a third rotation shaft (410) arranged in a triangle; wherein the leg supporting fixed piece (1) is hingedly connected with the first three-rotation piece (401) through the first rotation shaft (408); a first double-rotation piece (402) having one end hingedly connected with the first three-rotation piece (401) through the second rotation shaft (409); a second double-rotation piece (403) hingedly connected with the first three-rotation piece (401) through the third rotation shaft (410); wherein the second double-rotation piece (403) is provided with a cross beam portion (4031) for being connected to the leg supporting plate (2); a second three-rotation piece (404) having one end hingedly connected with the other end of the first double-rotation piece (402), and a middle portion hingedly connected with the second double-rotation piece (403); a third double-rotation piece (405) having one end hingedly connected with the other end of the second three-rotation piece (404), and the other end hingedly connected with the buckle base (301); a limiting clamping rod (411) mounted on the third double-rotation piece (405) and used for being clamped into the U-shaped clamping slot (3021) when the leg supporting plate (2) is rotated to the storage state, so as to limit the leg supporting plate (2) from being rotated outward. A first connecting rod tension spring (406) has one end connected with the leg supporting fixture (1) and the other end connected with the second double rotating member (403), which is used to drive the cross beam (4031) to rotate downward around the third rotating shaft (410) so that the second triple rotating member (404) cooperates with the second rotating shaft (409) to pull the first double rotating member (402) from both ends; A second connecting rod tension spring (407) has one end connected with the cross beam (4031) and the other end connected with the third double rotating member (405) near one end of the second triple rotating member (404), which is used to drive the mutual hinged ends of the third double rotating member (405) and the second triple rotating member (404) to rotate towards the cross beam (4031) so that the leg supporting plate (2) rotates outward relative to the leg supporting fixture (1) to the extended state.

7. The buckle-style leg rest of claim 6, wherein, The cross beam (4031) and the leg supporting plate (2) are connected through a hinge assembly (412).

8. The buckle-style leg rest of claim 6, wherein, The leg supporting fixture (1) is provided with a thrust surface (101) for providing support to the second double rotating member (403) to limit the cross beam (4031) to continue to rotate downward.

9. The buckle-style leg rest of claim 8, wherein, The second double rotating member (403) is provided with a resistance reducing roller (413) corresponding to the position of the thrust surface (101) for abutting against the thrust surface (101).

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