Two-stage expansion type electric four-way leg support mechanism based on angle adjuster driving

Abstract

The utility model belongs to the technical field of vehicle seat leg supports, and particularly relates to a two-stage unfolding type electric four-way leg support mechanism based on driving of an angle adjuster. Through the reasonable structural design of the rotating mechanism, the extending mechanism and the linkage resetting mechanism, the leg support can rotate and stretch out and draw back only through a single motor, the space needed by arrangement of the leg support mechanism can be greatly saved, and light weight of a seat can be achieved conveniently; according to the leg support, the rotary base body transverse plate, the first-stage extending transverse plate and the second-stage extending transverse plate are matched to form a second-stage unfolding type retractable structure, the overall structure is compact, the size of the leg support during storage can be effectively reduced, and the storage problem of the leg support of the automobile seat in a small space in the vertical direction is solved; the seat is flexible to operate, convenient to maintain and easy to popularize, and the overall weight and the manufacturing cost of the seat can be effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle seat leg support technology, specifically relating to a two-stage unfolding electric four-way leg support mechanism driven by an angle adjuster. Background Technology

[0002] Currently, the demand for seat comfort in automobiles is increasing, with zero-gravity seat adjustment becoming a new highlight. This is especially true for MPVs and large SUVs, where zero-gravity adjustment is now a requirement for middle-row seats. Zero-gravity adjustment refers to raising the front of the seat, allowing the passenger's weight to be evenly distributed across the entire seat, avoiding concentrated pressure zones. When passengers are lying down, without leg support, their legs dangling for extended periods can lead to insufficient blood supply and discomfort. Therefore, leg support mechanisms are an essential component for achieving zero-gravity seat adjustment.

[0003] Car seat leg rests on the market are generally two-way or four-way. Two-way leg rests can only achieve one of the functions of rotation or extension, while four-way leg rests can achieve both rotation and extension functions simultaneously. However, the existing four-way leg rest mechanism of car seats uses two motors to control the two functions separately. That is, one motor drives the rotation mechanism to achieve the rotation function, and the other motor drives the extension mechanism to achieve the extension function. This solution has high requirements for seat frame space and is not conducive to controlling the cost and weight of the seat. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive. It has a compact structure, is easy to use, and can realize both rotation and extension of the leg support through a single motor. It can save a lot of space required for the arrangement of the leg support mechanism and facilitate the lightweighting of the seat.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive mainly includes: a rotating mechanism 100, an extension mechanism 200, and a linkage reset mechanism 300. The rotating mechanism 100 includes two core component fixing brackets 102 respectively installed on both sides of the leg support mounting bracket 004. Two angle adjuster core components 101 are fixedly connected to the middle of the two core component fixing brackets 102 respectively, and the inner sides of the two core component fixing brackets 102 are fixedly connected through a horizontal tube 104. A pull wire guide block 105 is installed on the horizontal tube 104. The two angle adjuster core components 101 are rotatably embedded in the ends of two rotating base brackets 103 respectively. The two rotating base brackets 103 are fixedly connected to both sides of the rotating base horizontal plate 107 respectively. A spline rod 003 is passed through the middle of the two angle adjuster core components 101, and one end of the spline rod 003 is connected to an angle adjuster motor 001.

[0007] The extension mechanism 200 includes a secondary extension plate 202 slidably sleeved outside the rotating base plate 107 and a primary extension plate 201 slidably sleeved outside the secondary extension plate 202.

[0008] The linkage reset mechanism 300 includes a reset spring 301 and a pull wire 302. The upper suspension point of the pull wire 302 is hinged to the rotating base horizontal plate 107. After passing around the pull wire guide block 105 on the rotating mechanism 100, it passes around the pull wire guide groove at the bottom of the rotating base horizontal plate 107. Its lower suspension point is fixed to the upper end of the first-stage extension horizontal plate 201. One end of the reset spring 301 is fixedly connected to the rotating base horizontal plate 107, and the other end is fixedly connected to the first-stage extension horizontal plate 201.

[0009] Preferably, the pull wire guide block 105 is rotatably mounted on the horizontal tube 104, and its two ends are respectively limited by two retaining rings 106.

[0010] Preferably, the upper surface of the rotating base plate 107 is provided with a suspension point for the return spring 301 and a connection point for the pull wire 302, and the bottom surface of the rotating base plate 107 is provided with a pull wire guide groove from the bottom end to the top end.

[0011] Preferably, the upper end and lower end of the secondary extension horizontal plate 202 are respectively provided with an upper sliding groove 205 and a lower sliding groove 206. A step screw 1 203 and a step screw 204 are respectively inserted into the upper sliding groove 205 and the lower sliding groove 206. The top of the step screw 1 203 is fixed to the upper end of the primary extension horizontal plate 201, and the bottom of the step screw 204 is fixed to the lower end of the rotating base horizontal plate 107.

[0012] Preferably, the upper suspension point of the pull wire 302 is hinged to the pull wire connection point at the lower end of the rotating base horizontal plate 107, and the lower suspension point of the pull wire 302 is fixed to the step screw 203 at the upper end of the first-stage extension horizontal plate 201.

[0013] Preferably, the upper end of the return spring 301 is fixedly connected to the suspension point at the upper end of the rotating base horizontal plate 107, and the lower end of the return spring 301 is fixedly connected to the suspension point at the lower end of the first-stage extension horizontal plate 201.

[0014] Preferably, the spline rod 003 passes through the spline groove in the middle of the two angle adjuster core components 101 in sequence and is then connected to the angle adjuster motor 001.

[0015] Preferably, the angle adjuster motor 001 is fixedly installed on one side of the rotating mechanism 100 by motor fixing bolts 002.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] 1. The present invention provides a two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive. Through the reasonable structural design of the rotation mechanism, extension mechanism and linkage reset mechanism, it can realize the two actions of leg support rotation and extension with only a single motor, which can save a lot of space required for the arrangement of the leg support mechanism and facilitate the lightweighting of the seat.

[0018] 2. This utility model forms a two-stage unfoldable retractable structure by combining a rotating base horizontal plate, a first-stage extension horizontal plate, and a second-stage extension horizontal plate. Its overall structure is compact and can effectively reduce the volume of the leg rest when stored, thus solving the problem of storing the car seat leg rest in a small vertical space.

[0019] 3. This utility model is flexible in operation, easy to maintain, and can effectively reduce the overall weight and manufacturing cost of the seat, making it easy to promote. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall electric four-way leg support mechanism of this utility model;

[0021] Figure 2 This is a disassembled schematic diagram of the main components of this utility model;

[0022] Figure 3 This is an external schematic diagram of the leg support mechanism of this utility model when it is retracted;

[0023] Figure 4 This is a schematic diagram of the internal limiting mechanism of the leg support mechanism of this utility model when it is retracted;

[0024] Figure 5This is an external schematic diagram of the leg support mechanism of this utility model when the first stage is deployed;

[0025] Figure 6 This is a schematic diagram of the internal limiting mechanism of the leg support mechanism of this utility model when the first stage is deployed;

[0026] Figure 7 This is an external schematic diagram of the leg support mechanism of this utility model when it is deployed in two stages;

[0027] Figure 8 This is a schematic diagram of the internal limiting mechanism of the leg support mechanism of this utility model when it is deployed in two stages;

[0028] Figure 9 This is a schematic diagram of the wire winding of this utility model;

[0029] Figure 10 This is a simplified diagram illustrating the motion principle of this utility model.

[0030] In the diagram: 100-rotating mechanism, 200-extension mechanism, 300-linkage reset mechanism, 001-angle adjuster motor, 002-motor fixing bolt, 003-spline rod, 004-leg support mounting bracket, 101-angle adjuster core component, 102-core component fixing bracket, 103-rotating base bracket, 104-horizontal tube, 105-pull wire guide block, 106-clip ring, 107-rotating base horizontal plate, 201-first-level extension horizontal plate, 202-second-level extension horizontal plate, 203-step screw one, 204-step screw two, 205-upper slide groove, 206-lower slide groove, 301-return spring, 302-pull wire. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0036] Example 1: This example provides a two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive, such as... Figures 1-10 As shown, it mainly includes: a rotating mechanism 100, an extension mechanism 200, and a linkage reset mechanism 300;

[0037] The rotating mechanism 100 includes two core component fixing brackets 102 respectively installed on both sides of the leg support mounting bracket 004. Two angle adjuster core components 101 are fixedly connected to the middle of the two core component fixing brackets 102 respectively, and the inner sides of the two core component fixing brackets 102 are fixedly connected by a horizontal tube 104. A pull wire guide block 105 is installed on the horizontal tube 104. The two angle adjuster core components 101 are rotatably embedded in the ends of two rotating base brackets 103 respectively. The two rotating base brackets 103 are fixedly connected to both sides of the rotating base horizontal plate 107 respectively. A spline rod 003 is passed through the middle of the two angle adjuster core components 101. One end of the spline rod 003 is connected to an angle adjuster motor 001.

[0038] The extension mechanism 200 includes a secondary extension plate 202 slidably sleeved outside the rotating base plate 107 and a primary extension plate 201 slidably sleeved outside the secondary extension plate 202.

[0039] The linkage reset mechanism 300 includes a reset spring 301 and a pull wire 302. The upper suspension point of the pull wire 302 is hinged to the rotating base horizontal plate 107. After passing around the pull wire guide block 105 on the rotating mechanism 100, it passes around the pull wire guide groove at the bottom of the rotating base horizontal plate 107. Its lower suspension point is fixed to the upper end of the first-stage extension horizontal plate 201. One end of the reset spring 301 is fixedly connected to the rotating base horizontal plate 107, and the other end is fixedly connected to the first-stage extension horizontal plate 201.

[0040] Furthermore, the pull wire guide block 105 is rotatably mounted on the horizontal tube 104, and its two ends are respectively limited by two retaining rings 106.

[0041] Furthermore, the upper surface of the rotating base plate 107 is provided with a suspension point for the return spring 301 and a connection point for the pull wire 302, and the bottom surface of the rotating base plate 107 is provided with a pull wire guide groove from the bottom end to the top end.

[0042] Furthermore, the upper end and lower end of the secondary extension horizontal plate 202 are respectively provided with an upper sliding groove 205 and a lower sliding groove 206. A step screw 1 203 and a step screw 204 are respectively inserted into the upper sliding groove 205 and the lower sliding groove 206. The top of the step screw 1 203 is fixed to the upper end of the primary extension horizontal plate 201, and the bottom of the step screw 204 is fixed to the lower end of the rotating base horizontal plate 107.

[0043] Furthermore, the upper suspension point of the pull wire 302 is hinged to the pull wire connection point at the lower end of the rotating base horizontal plate 107, and the lower suspension point of the pull wire 302 is fixed to the step screw 203 at the upper end of the first-stage extension horizontal plate 201.

[0044] Furthermore, the upper end of the reset spring 301 is fixedly connected to the suspension point at the upper end of the rotating base horizontal plate 107, and the lower end of the reset spring 301 is fixedly connected to the suspension point at the lower end of the first-stage extension horizontal plate 201.

[0045] Furthermore, the spline rod 003 passes through the spline groove in the middle of the two angle adjuster core components 101 in sequence and is connected to the angle adjuster motor 001.

[0046] Furthermore, the angle adjuster motor 001 is fixedly installed on one side of the rotating mechanism 100 by motor fixing bolts 002.

[0047] Example 2: This example provides a two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive, such as... Figures 1-2 As shown, the rotating mechanism 100 is the active mechanism of the entire leg support mechanism. One end of the core component 101 of the angle adjuster is fixedly connected to the core component fixing bracket 102. The core component fixing brackets 102 on both sides of the rotating mechanism are fixedly connected by the horizontal tube 104, which serves as a reinforcement. There is a pull wire guide block 105 on the horizontal tube 104, which is limited by the retaining ring 106. The other end of the core component 101 of the angle adjuster is fixedly connected to the rotating base bracket 103. The two rotating base brackets 103 on both sides are fixedly connected to the rotating base horizontal plate 107. Specifically, in this embodiment, bolts are used for fixing. Thus, the rotating mechanism forms an integral frame structure. The upper surface of the rotating base horizontal plate 107 is reserved with the upper suspension point of the return spring 301 and the upper hinge point of the pull wire 302, and the lower surface is provided with a pull wire guide groove.

[0048] Furthermore, such as Figures 3-8As shown, the extension mechanism 200 consists of a primary extension plate 201 and a secondary extension plate 202. The secondary extension plate 202 is pressed onto the rotating base plate 107 by a step screw 204. Since the step surface of the step screw 204 is located in the lower groove of the secondary extension plate 202, the secondary extension plate 202 can slide back and forth relative to the rotating base plate 107. The primary extension plate 201 is pressed onto the secondary extension plate 202 by a step screw 203. Since the step surface of the step screw 203 is located in the upper groove of the secondary extension plate 202, the primary extension plate 201 can also slide back and forth relative to the secondary extension plate 202.

[0049] Furthermore, such as Figures 9-10 As shown, the linkage reset mechanism 300 consists of a reset spring 301 and a pull wire 302. The upper suspension point of the pull wire 302 is hinged to the rotating base horizontal plate 107, passes around the pull wire guide block 105 on the rotating mechanism 100, and then passes around the pull wire guide groove below the rotating base horizontal plate 107. Its lower suspension point is fixed to the upper end of the first-stage extension horizontal plate 201 by a stepped screw 203. Its function is to convert the rotational motion of the rotating mechanism 100 into the linear motion of the telescopic mechanism 200. The upper end of the reset spring 301 is connected to the rotating base horizontal plate 107, and the lower end is connected to the first-stage extension horizontal plate 201, serving a reset function.

[0050] The wire guide block 105 and the wire guide groove below the rotating base plate 107 are essentially pulleys, which serve to change the direction of the wire.

[0051] Furthermore, the angle adjuster motor 001 is fixedly connected to the rotating mechanism 100 by motor fixing bolts 002. A spline rod 003 passes through the left and right sides of the angle adjuster core component 101 and the angle adjuster motor 001, serving as a transmission mechanism.

[0052] In practical use:

[0053] Through electronic control, the spline hole of the angle adjuster motor 001 rotates, which is transmitted by the spline rod 003 to drive the rotating mechanism 100, causing it to change angle. The rotating mechanism 100 rotates forward, increasing the distance between the pull wire guide groove below the rotating base horizontal plate 107 and the pull wire guide block 105 on the horizontal tube 104. Since the length of the pull wire 302 is constant, the increase in the rear end distance reduces the front end distance, thus causing the first-stage extension horizontal plate 201 to extend forward along the upper sliding groove of the second-stage extension horizontal plate 202. Figures 5-6As the rotating mechanism 100 continues to rotate, the primary extension plate 201 slides to the lower limit of the upper slide groove of the secondary extension plate 202. At this point, the force of the pull wire 302 is transmitted to the secondary extension plate 202 through the stepped screw 203 and the upper slide groove limit point. At this time, the primary extension plate 201 and the secondary extension plate 202 no longer move relative to each other, but form a whole, i.e., the extension mechanism 200. Driven by the pull wire 302, the extension mechanism 200 continues to extend forward along the lower slide groove of the secondary extension plate 202 until it reaches the upper limit of the lower slide groove of the secondary extension plate 202. Figures 7-8 During reset, the rotating mechanism 100 rotates backward, and at the same time, the reset spring 301 pulls back the extended telescopic mechanism 200 by restoring force, completing the entire movement.

[0054] Furthermore, in this embodiment, the core component 101 of the angle adjuster is driven by a motor to drive the rotating base support 103 to rotate around the center of the rotating shaft. Optionally, a push rod motor can also be used to directly drive the rotating base support 103 to rotate.

[0055] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0056] In summary:

[0057] 1. The present invention provides a two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive. Through the reasonable structural design of the rotation mechanism, extension mechanism and linkage reset mechanism, it can realize the two actions of leg support rotation and extension with only a single motor, which can save a lot of space required for the arrangement of the leg support mechanism and facilitate the lightweighting of the seat.

[0058] 2. This utility model forms a two-stage unfoldable retractable structure by combining a rotating base horizontal plate, a first-stage extension horizontal plate, and a second-stage extension horizontal plate. Its overall structure is compact and can effectively reduce the volume of the leg rest when stored, thus solving the problem of storing the car seat leg rest in a small vertical space.

[0059] 3. This utility model is flexible in operation, easy to maintain, and can effectively reduce the overall weight and manufacturing cost of the seat, making it easy to promote.

[0060] The above embodiments are only used to illustrate the design concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The protection scope of this utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in this utility model are within the protection scope of this utility model.

Claims

1. A two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive, characterized in that: The system includes a rotating mechanism (100), an extension mechanism (200), and a linkage reset mechanism (300). The rotating mechanism (100) includes two core component fixing brackets (102) respectively installed on both sides of the leg support mounting bracket (004). Two angle adjuster core components (101) are fixedly connected in the middle of the two core component fixing brackets (102), and the inner sides of the two core component fixing brackets (102) are fixedly connected through a horizontal tube (104). A pull wire guide block (105) is installed on the horizontal tube (104). The two angle adjuster core components (101) are rotatably embedded in the ends of two rotating base brackets (103). The two rotating base brackets (103) are fixedly connected to both sides of the rotating base horizontal plate (107). A spline rod (003) is passed through the middle of the two angle adjuster core components (101), and one end of the spline rod (003) is connected to an angle adjuster motor (001). The extension mechanism (200) includes a secondary extension plate (202) slidably sleeved outside the rotating base plate (107) and a primary extension plate (201) slidably sleeved outside the secondary extension plate (202). The linkage reset mechanism (300) includes a reset spring (301) and a pull wire (302). The upper suspension point of the pull wire (302) is hinged to the rotating base plate (107). After passing through the pull wire guide block (105) on the rotating mechanism (100), it passes through the pull wire guide groove at the bottom of the rotating base plate (107). Its lower suspension point is fixed to the upper end of the first-level extension plate (201). One end of the reset spring (301) is fixedly connected to the rotating base plate (107), and the other end is fixedly connected to the first-level extension plate (201).

2. The two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 1, characterized in that: The pull wire guide block (105) is rotatably mounted on the horizontal tube (104), and its two ends are respectively limited by two retaining rings (106).

3. The two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 1, characterized in that: The upper surface of the rotating base plate (107) is provided with a suspension point of the reset spring (301) and a connection point of the pull wire (302). The bottom surface of the rotating base plate (107) is provided with a pull wire guide groove from the bottom end to the top end.

4. The two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 1, characterized in that: The upper end and lower end of the secondary extension horizontal plate (202) are respectively provided with an upper sliding groove (205) and a lower sliding groove (206). The upper sliding groove (205) and the lower sliding groove (206) are respectively provided with a step screw one (203) and a step screw two (204). The top of the step screw one (203) is fixed to the upper end of the primary extension horizontal plate (201), and the bottom of the step screw two (204) is fixed to the lower end of the rotating base horizontal plate (107).

5. A two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 4, characterized in that: The upper suspension point of the pull wire (302) is hinged to the pull wire connection point at the lower end of the rotating base plate (107), and the lower suspension point of the pull wire (302) is fixed to the step screw (203) at the upper end of the first-level extension plate (201).

6. The two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 1, characterized in that: The upper end of the reset spring (301) is fixedly connected to the suspension point at the upper end of the rotating base plate (107), and the lower end of the reset spring (301) is fixedly connected to the suspension point at the lower end of the first-level extension plate (201).

7. A two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 1, characterized in that: The spline rod (003) passes through the spline groove in the middle of the two angle adjuster core components (101) and is then connected to the angle adjuster motor (001).

8. A two-stage unfolding electric four-way leg support mechanism based on an angle adjuster drive according to claim 7, characterized in that: The angle adjuster motor (001) is fixedly installed on one side of the rotating mechanism (100) by motor fixing bolts (002).

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