Leg support adjusting mechanism

Abstract

A leg support adjusting mechanism comprises a first adjusting mechanism (10), a second adjusting mechanism (20) and a third adjusting mechanism (30), the second adjusting mechanism (20) drives the first adjusting mechanism (10) to rotate, the first adjusting mechanism (10) is provided with a telescopic frame (11), the third adjusting mechanism (30) is installed on the telescopic frame (11), and the telescopic frame (11) is provided with a telescopic rod (12). The second adjusting mechanism (20) comprises a connecting rod structure (21) and a second driving unit (22). The first adjusting mechanism (10) further comprises a fixing frame (12) and a first driving unit (13). A second adjusting mechanism drives a first adjusting mechanism to rotate, the second adjusting mechanism comprises a connecting rod structure and a second driving unit for driving the connecting rod structure to stretch out and draw back, and the first adjusting mechanism further comprises a fixing frame and a first driving unit for driving a telescopic frame to do linear reciprocating motion on the fixing frame. The structure is relatively simple, the cost is low, and the maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, especially a leg support adjusting mechanism. BACKGROUND

[0002] The automobile seat is the seat when riding, at present, the number of domestic cars is increasing day by day, and people's comfort demand in the process of riding is increasing day by day, in order to effectively improve the riding comfort, the seat on the market is usually adjustable, for example, by adjusting the backrest angle for the person to be able to sit or lie down and so on.

[0003] In the prior art, the utility model discloses a kind of six-way electric leg support devices of automobile seat with the announcement number CN216184691U, including calf length adjusting mechanism, knee angle adjusting mechanism, foot pedal adjusting mechanism;The calf length adjusting mechanism includes three-stage telescopic frame and is fixed in three-stage telescopic frame for driving flexible telescopic drive mechanism for driving three-stage telescopic frame to stretch out and draw back;The knee angle adjusting mechanism is fixed on calf length adjusting mechanism for driving calf length adjusting mechanism to pitch and turn;The foot pedal adjusting mechanism is fixed at the front end of calf length adjusting mechanism.Calf length adjusting mechanism includes first-stage frame, second-stage frame, third-stage frame, and flexible telescopic drive mechanism includes three-stage connecting rod telescopic mechanism, drive gear pair, length adjusting motor assembly;Three-stage connecting rod telescopic mechanism is hinged by first-stage connecting rod pair, second-stage connecting rod pair, third-stage connecting rod pair in turn.Calf support device structure is complex, cost is high, maintenance is difficult, cannot meet the increasingly high requirement of modern people to leg support device.

[0004] Therefore, prior art needs to be improved and improved. INVENTION CONTENTS

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a leg support adjusting mechanism with relatively simple structure, low cost and convenient maintenance.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] A leg support adjusting mechanism, comprising a first adjusting mechanism, a second adjusting mechanism and a third adjusting mechanism, the second adjusting mechanism drives the first adjusting mechanism to rotate, the first adjusting mechanism has a telescopic telescopic frame, the third adjusting mechanism is installed on the telescopic frame, the second adjusting mechanism comprises a connecting rod structure and a second drive unit for driving the connecting rod structure to stretch out and draw back, and the first adjusting mechanism further comprises a fixed frame and a first drive unit for driving the telescopic frame to make linear reciprocating motion on the fixed frame.

[0008] As a further scheme of the utility model, the connecting rod structure includes two groups of parallelly arranged connecting units, the connecting unit includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, one end of the first connecting rod is fixedly connected with the first adjusting mechanism, the other end is hingedly connected with one end of the third connecting rod, one end of the second connecting rod is fixedly connected with the first adjusting mechanism, the other end is hingedly connected with the fourth connecting rod, the middle part of the third connecting rod is hingedly connected with the second connecting rod close to the hinged part of the second connecting rod and the fourth connecting rod.

[0009] As a further scheme of the utility model, the second driving unit includes a second screw rod and a second driving source driving the second screw rod to make linear reciprocating motion, the free end of the second screw rod is connected with a cross rod, and the cross rod is arranged between the two third connecting rods.

[0010] As a further scheme of the utility model, the second driving source is installed on a second mounting bracket, the second mounting bracket is arranged between two fixed plates, and the fixed plates are hingedly connected with the other end of the third connecting rod and the other end of the fourth connecting rod.

[0011] As a further scheme of the utility model, the first driving unit includes a first screw rod and a first driving source driving the first screw rod to make linear reciprocating motion, the first driving source is installed on a first mounting bracket, the first mounting bracket is fixed on the fixed frame, and the first screw rod is provided with a driving member, and the driving member is fixed on the telescopic frame.

[0012] As a further scheme of the utility model, the third adjusting mechanism includes a foot supporting plate, a rotating shaft, a gear, a sector gear and a third driving unit, the foot supporting plate is fixed on the rotating shaft, the rotating shaft is rotatably installed on the telescopic frame, the gear is sleeved on the middle part of the rotating shaft, the sector gear is engaged with the gear, and the third driving unit drives the sector gear to rotate.

[0013] As a further scheme of the utility model, the third driving unit includes a third screw rod and a third driving source driving the third screw rod to make linear reciprocating motion, and the third driving source is installed on the inner wall surface of the telescopic frame.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] Due to the adoption of the above structure design, namely, the second adjusting mechanism drives the first adjusting mechanism to rotate, the first adjusting mechanism has a telescopic telescopic frame, the third adjusting mechanism is installed on the telescopic frame, the second adjusting mechanism comprises a connecting rod structure and a second driving unit for driving the connecting rod structure to telescopically extend, and the first adjusting mechanism further comprises a fixed frame and a first driving unit for driving the telescopic frame to linearly reciprocate on the fixed frame, so that the structure is relatively simple, the cost is low, and the maintenance is convenient, and the increasingly high requirement of people on the leg supporting device can be met. BRIEF DESCRIPTION OF DRAWINGS

[0016] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is a structural schematic view of the embodiment of the utility model;

[0017] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is a schematic view when the second adjusting mechanism of the embodiment of the utility model is unfolded;

[0018] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is a schematic view when the first adjusting mechanism and the second adjusting mechanism of the embodiment of the utility model are unfolded;

[0019] BRIEF DESCRIPTION OF DRAWINGS Figure 4 It is a schematic view when the first adjusting mechanism, the second adjusting mechanism and the third adjusting mechanism of the embodiment of the utility model are unfolded;

[0020] BRIEF DESCRIPTION OF DRAWINGS Figure 5 It is another schematic view when the first adjusting mechanism, the second adjusting mechanism and the third adjusting mechanism of the embodiment of the utility model are unfolded;

[0021] BRIEF DESCRIPTION OF DRAWINGS Figure 6 It is a schematic view when the embodiment of the utility model is folded.

[0022] The respective reference numerals in the drawing are as follows:

[0023] 10-first adjusting mechanism, 20-second adjusting mechanism, 30-third adjusting mechanism;

[0024] 11-telescopic frame, 12-fixed frame, 13-first driving unit;

[0025] 21-connecting rod structure, 22-second driving unit;

[0026] 211-first connecting rod, 212-second connecting rod, 213-third connecting rod, 214-fourth connecting rod;

[0027] 221-second screw rod, 222-second driving source, 223-second mounting frame, 224-fixed plate, 225-cross rod;

[0028] 131-first screw rod, 132-first driving source, 133-first mounting frame, 134-driving piece;

[0029] 31 - foot plate, 32 - rotating shaft, 33 - gear, 34 - sector gear, 35 - third driving unit

[0030] 351 - third screw, 352 - third driving source. DETAILED DESCRIPTION

[0031] The technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. It should be pointed out that all the drawings are exemplary representations. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0034] The present application will be described in further detail below through specific embodiments and in combination with the drawings. EMBODIMENT

[0035] As Figures 1-6As shown, the leg support adjusting mechanism of the present application comprises a first adjusting mechanism 10, a second adjusting mechanism 20 and a third adjusting mechanism 30, the second adjusting mechanism 20 drives the first adjusting mechanism 10 to rotate, the first adjusting mechanism 10 has an extendable telescopic frame 11, the third adjusting mechanism 30 is installed on the telescopic frame 11, the second adjusting mechanism 20 comprises a connecting rod structure 21 and a second driving unit 22 driving the connecting rod structure 21 to extend, the first adjusting mechanism 10 further comprises a fixed frame 12 and a first driving unit 13 driving the telescopic frame 11 to make linear reciprocating motion on the fixed frame 12, through the above structure design, the second adjusting mechanism drives the first adjusting mechanism to rotate through the connecting rod structure, the first adjusting mechanism drives the telescopic frame to realize extension and retraction, and the third adjusting mechanism realizes folding of the foot support plate, compared with the multi-connecting rod adjusting structure and the multi-frame extension and retraction structure in the prior art, the structure is relatively simple, the cost is low, and maintenance is also facilitated.

[0036] Specifically, the connecting rod structure 21 comprises two groups of parallelly arranged connecting units, the connecting unit comprises a first connecting rod 211, a second connecting rod 212, a third connecting rod 213 and a fourth connecting rod 214, one end of the first connecting rod 211 is fixedly connected with the telescopic frame 11, the other end is hingedly connected with one end of the third connecting rod 213, one end of the second connecting rod 212 is also fixedly connected with the telescopic frame 11, the other end is hingedly connected with the fourth connecting rod 214, and the middle part of the third connecting rod 213 is hingedly connected with the second connecting rod 212 close to the hinged connection position of the second connecting rod 212 and the fourth connecting rod 214.

[0037] The second driving unit 22 comprises a second screw rod 221 and a second driving source 222 driving the second screw rod 221 to make linear reciprocating motion, the free end of the second screw rod 221 is connected with a cross rod 225, and the cross rod 225 is arranged between the two third connecting rods 213, since the second screw rod is connected with the cross rod and the cross rod is arranged between the two third connecting rods of the connecting rod structure, when the second screw rod makes linear motion, the telescopic frame connected with the connecting rod structure is driven to move away from the second driving source. In the utility model, the second driving source 222 adopts a brushless DC motor.

[0038] Specifically, the second driving source 222 is installed on a second mounting frame 223, the second mounting frame 223 is arranged between two fixed plates 224, the fixed plates 224 are hingedly connected with the other end of the third connecting rod 213 and the other end of the fourth connecting rod 214, and the two fixed plates 224 are fixed to the bottom of the automobile seat.

[0039] Specifically, the first driving unit 13 comprises a first screw rod 131 and a first driving source 132 driving the first screw rod 131 to make linear reciprocating motion, the first driving source 132 is installed on a first mounting frame 133, the first mounting frame 133 is fixed on the fixed frame 12, the first screw rod 131 is sleeved with a driving member 134, and the driving member 134 is fixed on the telescopic frame 11.

[0040] Specifically, the third adjusting mechanism 30 comprises a foot supporting plate 31, a rotating shaft 32, a gear 33, a sector gear 34 and a third driving unit 35, the foot supporting plate 31 is fixed on the rotating shaft 32, the rotating shaft 32 is rotatably installed on the telescopic frame 11, the gear 33 is sleeved on the middle part of the rotating shaft 32, the sector gear 34 is engaged with the gear 33, and the third driving unit 35 drives the sector gear 34 to rotate.

[0041] In summary, the utility model discloses the structure design through above-mentioned, solve the deficiency in the prior art, with relatively simple structure, low in cost, convenient maintenance and so on.

[0042] The above is only the specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and any skilled person in the art can easily think of the change or replacement within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A leg rest adjustment mechanism comprising a first adjustment mechanism (10), a second adjustment mechanism (20) and a third adjustment mechanism (30), the second adjustment mechanism (20) driving the first adjustment mechanism (10) to rotate, characterized in that: The first adjusting mechanism (10) has a telescopic telescopic frame (11), the third adjusting mechanism (30) is installed on the telescopic frame (11), the second adjusting mechanism (20) comprises a connecting rod structure (21) and a second drive unit (22) for driving the connecting rod structure (21) to stretch out and draw back, and the first adjusting mechanism (10) further comprises a fixed frame (12) and a first drive unit (13) for driving the telescopic frame (11) to make linear reciprocating motion on the fixed frame (12).

2. The leg rest adjustment mechanism of claim 1, wherein: The connecting rod structure (21) comprises two groups of parallelly arranged connecting units, the connecting unit comprises a first connecting rod (211), a second connecting rod (212), a third connecting rod (213) and a fourth connecting rod (214), one end of the first connecting rod (211) is fixedly connected with the first adjusting mechanism (10), the other end is hingedly connected with one end of the third connecting rod (213), one end of the second connecting rod (212) is fixedly connected with the first adjusting mechanism (10), the other end is hingedly connected with the fourth connecting rod (214), and the middle part of the third connecting rod (213) is hingedly connected with the second connecting rod (212) close to the hinged connection between the second connecting rod (212) and the fourth connecting rod (214).

3. The leg rest adjustment mechanism of claim 2, wherein: The second drive unit (22) comprises a second screw rod (221) and a second drive source (222) for driving the second screw rod (221) to make linear reciprocating motion, the free end of the second screw rod (221) is connected with a cross rod (225), and the cross rod (225) is arranged between the two third connecting rods (213).

4. The leg rest adjustment mechanism of claim 3, wherein: The second drive source (222) is installed on a second mounting frame (223), the second mounting frame (223) is arranged between two fixed plates (224), and the fixed plates (224) are hingedly connected with the other end of the third connecting rod (213) and the other end of the fourth connecting rod (214).

5. The leg rest adjustment mechanism of claim 4, wherein: The first drive unit (13) comprises a first screw rod (131) and a first drive source (132) for driving the first screw rod (131) to make linear reciprocating motion, the first drive source (132) is installed on a first mounting frame (133), the first mounting frame (133) is fixed on the fixed frame (12), and the first screw rod (131) is externally sleeved with a driving piece (134), and the driving piece (134) is fixed on the telescopic frame (11).

6. The leg rest adjustment mechanism of claim 5, wherein: The third adjusting mechanism (30) comprises a foot supporting plate (31), a rotating shaft (32), a gear (33), a sector gear (34) and a third drive unit (35), the foot supporting plate (31) is fixed on the rotating shaft (32), the rotating shaft (32) is rotatably installed on the telescopic frame (11), the gear (33) is sleeved on the middle part of the rotating shaft (32), the sector gear (34) is engaged with the gear (33), and the third drive unit (35) drives the sector gear (34) to rotate.

7. The leg rest adjustment mechanism of claim 6, wherein: The third driving unit (35) comprises a third screw rod (351) and a third driving source (352) for driving the third screw rod (351) to make linear reciprocating motion, and the third driving source (352) is installed on the inner wall surface of the telescopic stand (11).

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