Structure for folding and adjusting a footrest of a seat

Abstract

The utility model discloses a structure device of seat foot rest folding adjustment belongs to seat technical field. The device includes telescopic link assembly, gas spring subassembly and foot rest main part: telescopic link assembly contains base and telescopic adjustable telescopic link, and its free end parallel connection fixed pipe and rotating pipe, gas spring subassembly is connected with telescopic link rigidity through fixed base, and pull line linkage unlocking mechanism and pull line switch, foot rest main part is by the big foot rest and small foot rest of torsion hinge connection, is fixed with rotating pipe through fixed sheet metal and is fixedly connected, and fixed pipe is connected with telescopic link rigidity. The device realizes foot rest distance adjustment through telescopic link and gas spring subassembly cooperation, and gas spring telescopic direction is parallel with telescopic link to keep support force, and the operation pull line switch can unlock gas spring, and make foot rest main part adjust angle around rotating pipe axis. Foot rest main part can be folded and unfolded in 180 degree range through torsion hinge, satisfies the adaptive adjustment demand of different height posture, and has the operation convenience and structural stability.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a structural device for adjusting the folding of the seat footrest. Background Technology

[0002] In modern life, chairs have become an indispensable part of people's lives. However, prolonged use of chairs can easily lead to fatigue and spinal injuries. A footrest that can be adjusted according to the user's height and posture can make lying down more comfortable.

[0003] In existing technologies, some seats use telescopic rods as pull-out footrests. These footrests can only switch between unfolding and folding, lacking adjustment functions and resulting in poor comfort. Other seats utilize sheet metal as a transmission component, employing a four-bar linkage to extend the footrest outwards for folding. However, due to the characteristics of the four-bar linkage, the footrest can only unfold along a fixed path, unable to adapt to different needs. Additionally, some seats use a large amount of sheet metal linked to the seat back adjustment. While adjusting the backrest allows for simultaneous adjustment of the footrest angle, it cannot be adjusted independently. Furthermore, this structure is complex, and a large amount of sheet metal cannot be completely concealed when the footrest is folded, affecting the overall appearance. Moreover, while some seats use folding mechanisms to increase the footrest area, they cannot adapt to individual height and posture, and lack a fixing mechanism when the footrest is unfolded, resulting in a lack of effective support for the user. These structures are complex and offer poor comfort.

[0004] Therefore, it is necessary to provide a structural device for adjusting the folding of the seat footrest to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a structural device for adjusting the folding of the seat footrest, so as to solve the problems of limited adjustment function, poor adaptability, complex structure and insufficient support of the existing seat footrest, so as to realize flexible adjustment of the distance and angle of the footrest, and improve the comfort and convenience of use.

[0006] To achieve the aforementioned objectives, this utility model adopts the following technical solution: a structural device for adjusting and folding seat footrests, comprising:

[0007] The telescopic rod assembly includes a telescopic rod base and an adjustable telescopic rod, with a fixed tube and a rotating tube connected to each other parallel to each other at the free end of the telescopic rod;

[0008] A gas spring assembly includes a gas spring, a pull cable, and a pull cable switch. The fixed end of the gas spring is fixedly connected to the telescopic rod through a gas spring mounting seat. The pull cable connects the unlocking mechanism of the gas spring to the pull cable switch.

[0009] The footrest body includes a large footrest and a small footrest connected by a torsion hinge. The large footrest is fixedly connected to the rotating tube by a fixed sheet metal, and the fixed tube is rigidly connected to the telescopic rod. The footrest body can be adjusted to near or far distance through the combined action of the telescopic rod assembly and the gas spring assembly.

[0010] When the pull-cord switch is operated, the gas spring is unlocked by pulling the cord, allowing the foot rest to be adjusted around the axis of the rotating tube.

[0011] Preferably, the device also includes a seat, a telescopic rod base is installed at the bottom of the seat, a rotating tube is connected to the free end of the telescopic rod and can rotate relative to it, and the fixed sheet metal is a rigid plate coaxially fixed near the end of the rotating tube.

[0012] Preferably, the extension and retraction direction of the gas spring is the same as and parallel to the extension and retraction direction of the telescopic rod, so that the telescopic rod moves synchronously with the gas spring during the adjustment process and maintains the supporting force on the footrest body.

[0013] Preferably, the pull-cord switch is fixed to the seat cushion, backrest, or armrest of the seat by bolts.

[0014] Preferably, the torsion hinge includes a first connecting plate and a second connecting plate that are hinged to each other. The first connecting plate is fixedly connected to the large foot rest, and the second connecting plate is fixedly connected to the small foot rest. The torsion hinge has a built-in torsion spring that provides rotational damping, so that the small foot rest can be unfolded and remain stable relative to the large foot rest within a 180° rotation range.

[0015] Preferably, the seat footrest folding and adjusting structure also includes a wired motor, which drives the unlocking valve of the gas spring through a gear rack mechanism or a screw and nut mechanism. The control buttons of the wired motor are arranged on the seat cushion, backrest or armrest of the seat, and the control buttons are electrically connected to the wired motor through wires.

[0016] Preferably, the footrest body also includes an integral footrest structure, which is fixedly connected to the rotating tube by a fixed sheet metal. The integral footrest structure is composed of a large footrest and a small footrest.

[0017] Preferably, the gas spring is an electrically controlled gas spring, which has an internal oil passage controlled by a solenoid valve. The solenoid valve is driven by a pull cable or a wire-controlled motor. When the solenoid valve is open, the gas spring can extend and retract freely, and when the solenoid valve is closed, the gas spring is locked in the current position.

[0018] The advantages of this utility model over the prior art are as follows:

[0019] 1. This utility model achieves precise adjustment of the distance between the footrest and the gas spring through the synergistic effect of the telescopic rod assembly and the gas spring assembly; after the gas spring is unlocked by operating the pull-wire switch, the footrest body can be adjusted around the axis of the rotating tube to meet the personalized needs of users of different heights and postures and improve lying comfort.

[0020] 2. The gas spring of this utility model extends in the same direction as and parallel to the telescopic rod, ensuring that the telescopic rod moves synchronously with the gas spring during adjustment, continuously maintaining the supporting force on the footrest body, and avoiding wobbling or insufficient support after adjustment.

[0021] 3. The main body of the footrest of this utility model connects the large footrest and the small footrest through a torsion hinge. The built-in torsion spring provides rotational damping, so that the small footrest can be unfolded relative to the large footrest within a 180° range and held stably. This not only makes it easy to expand the support area of ​​the footrest as needed, but also allows for compact folding when storing.

[0022] 4. The pull-cord switch of this utility model is fixed to the seat cushion, backrest or armrest with bolts for easy operation by the user; a wire-controlled motor can also be added to drive the gas spring unlocking valve through a gear rack or screw nut mechanism, and the control buttons are arranged in a convenient position on the seat to realize electric adjustment, further improving the ease of operation.

[0023] 5. The footrest body of this utility model can adopt an integral structure, which is composed of a large footrest and a small footrest, to meet different design requirements; the gas spring is electrically controlled, and the oil circuit is controlled by a solenoid valve to achieve free extension and locking, with a compact structure and precise adjustment. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 A three-dimensional structural schematic diagram of an embodiment of this utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the unfolded state of the large and small footrests;

[0027] Figure 3 A schematic diagram of the unfolded state of the footrest folding adjustment structure provided in an embodiment of this utility model;

[0028] Figure 4 A schematic diagram of the folded state of the footrest folding adjustment structure provided in an embodiment of this utility model;

[0029] Figure 5 for Figure 4Schematic diagram of the connection structure of pull-cord switch, telescopic rod, and gas spring;

[0030] Figure 6 for Figure 4 Schematic diagram of the connection structure between the telescopic rod and the gas spring;

[0031] Figure 7 for Figure 3 A schematic diagram showing the connection between the large and small footrests via a torsion hinge.

[0032] Reference numerals in the attached diagram: 1. Telescopic rod base; 2. Telescopic rod; 3. Gas spring; 4. Pull cable; 5. Pull cable switch; 6. Fixing tube; 7. Rotating tube; 8. Fixing sheet metal; 9. Large footrest; 10. Small footrest; 11. Torsion hinge; 111. First connecting plate; 112. Second connecting plate; 12. Gas spring fixing seat; 13. Seat. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is illustrative in nature and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary rather than limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] Please see Figures 1-3 One embodiment of this utility model provides a structural device for adjusting the folding of a seat footrest, comprising:

[0037] The telescopic rod assembly includes a telescopic rod base 1 and an adjustable telescopic rod 2, with a fixed tube 6 and a rotating tube 7 connected to each other at the free end of the telescopic rod 2.

[0038] The gas spring assembly includes a gas spring 3, a pull cable 4 and a pull cable switch 5. The fixed end of the gas spring 3 is fixedly connected to the telescopic rod 2 through the gas spring fixing seat 12. The pull cable 4 connects the unlocking mechanism of the gas spring 3 and the pull cable switch 5.

[0039] The footrest body includes a large footrest 9 and a small footrest 10 connected by a torsion hinge 11. The large footrest 9 is fixedly connected to the rotating tube 7 via a fixed sheet metal 8. The fixed tube 6 is rigidly connected to the telescopic rod 2. The footrest body can be adjusted to near or far distance through the combined action of the telescopic rod assembly and the gas spring assembly.

[0040] When the pull switch 5 is operated, the gas spring 3 is unlocked by pulling the cable 4, allowing the foot rest to be adjusted around the axis of the rotating tube 7.

[0041] More specifically, please refer to Figures 3-6 The device provided in this embodiment is used on the seat 13. It is installed on the bottom of the seat 13 through the telescopic rod base 1. The rotating tube 7 is axially connected to the free end of the telescopic rod 2 and can rotate relative to it. The fixed sheet metal 8 is a rigid plate coaxially fixed near the end of the rotating tube 7.

[0042] More specifically, please refer to Figures 3-6 The extension and retraction direction of the gas spring 3 is the same as and parallel to the extension and retraction direction of the telescopic rod 2, so that the telescopic rod 2 moves synchronously with the gas spring 3 during the adjustment process and maintains the supporting force on the footrest body.

[0043] More specifically, please refer to Figures 1-3 The pull switch 5 is fixed to the seat cushion, backrest, or armrest of the seat 13 by bolts. The pull switch 5 includes a housing, a trigger, and an adjusting nut. The housing is fixed to the seat cushion, backrest, or armrest of the seat by bolts. The trigger is connected to the housing via a rotating shaft and can drive the pull cable 4. The adjusting nut is used to adjust the tension of the pull cable 4 to ensure reliable unlocking of the gas spring 3.

[0044] More specifically, please refer to Figure 7 The torsion hinge 11 includes a first connecting plate 111 and a second connecting plate 112 that are hinged to each other. The first connecting plate 111 is fixedly connected to the large foot rest 9, and the second connecting plate 112 is fixedly connected to the small foot rest 10. The torsion hinge 11 has a built-in torsion spring that provides rotational damping, so that the small foot rest 10 can be unfolded relative to the large foot rest 9 within a 180° rotation range and remain stable.

[0045] More specifically, please refer to Figures 1-3 In another embodiment of this utility model, the seat footrest folding and adjusting structure also includes a wired motor. The wired motor drives the unlocking valve of the gas spring 3 through a gear rack mechanism or a screw nut mechanism. The control buttons of the wired motor are arranged on the seat cushion, backrest or armrest of the seat 13. The control buttons are electrically connected to the wired motor through wires.

[0046] More specifically, please refer to Figure 1 , Figure 3 , Figure 7 In another embodiment of the present invention, the main body of the seat footrest folding and adjusting structure also includes an integral footrest structure. The integral footrest structure is fixedly connected to the rotating tube 7 through the fixed sheet metal 8. The integral footrest structure is composed of a large footrest 9 and a small footrest 10.

[0047] More specifically, in another embodiment of this utility model, the gas spring 3 in the seat footrest folding and adjusting structure is an electrically controlled gas spring, which has an internal oil passage controlled by a solenoid valve. The solenoid valve is driven by a pull cable 4 or a wire-controlled motor. When the solenoid valve is open, the gas spring 3 can extend and retract freely, and when the solenoid valve is closed, the gas spring 3 is locked in the current position.

[0048] Working Principle: During use, when adjusting the distance of the footrest, the telescopic rod 2 of the telescopic rod assembly can be manually operated. Since the telescopic direction of the gas spring 3 is the same as and parallel to the telescopic rod 2, the gas spring 3 moves synchronously with the telescopic rod 2 via the gas spring fixing seat 12 during the movement of the telescopic rod 2. The two work together to move the footrest body horizontally, while the gas spring 3 continuously provides stable support, ensuring that the footrest body does not wobble during adjustment. When adjusting the footrest angle, pull the cable switch 5 located on the seat cushion, backrest, or armrest of the seat 13. The cable 4 will then activate the unlocking mechanism of the gas spring 3, unlocking it. If it is electrically controlled, the internal solenoid valve will open; if it is mechanically controlled, the mechanical locking structure will unlock. At this time, the footrest body loses the angle constraint of the gas spring 3 and can rotate freely around the axis of the rotating tube 7. After the angle is adjusted to the appropriate position, release the cable switch 5, and the gas spring 3 will relock, fixing the footrest body at the current angle.

[0049] In the folding and unfolding operation of the footrest body, the large footrest 9 and the small footrest 10 are connected by a torsion hinge 11 with a built-in torsion spring. The rotational damping provided by the torsion spring allows the small footrest 10 to rotate freely relative to the large footrest 9 within a range of 0-180°. When it is necessary to expand the support area, the small footrest 10 is unfolded outward, and the torsion spring damping will keep it stably at the unfolded angle; when it is necessary to store it, the small footrest 10 is folded inward, which can achieve compact storage. In addition, the device can also be adjusted by a wired motor: after pressing the control button, the wired motor drives the unlocking valve of the gas spring 3 through a gear and rack mechanism or a lead screw and nut mechanism to realize the electric unlocking and locking of the gas spring 3, thereby controlling the angle adjustment of the footrest body to meet the needs of different users for automated operation. This device realizes multi-functional operation of footrest distance, angle adjustment, and folding and unfolding, taking into account both adjustment convenience and structural stability.

[0050] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structural device for adjusting and folding the leg rest of a seat, characterized in that, include: The telescopic rod assembly includes a telescopic rod base (1) and a telescopic rod (2) that can be extended and adjusted. The free end of the telescopic rod (2) is connected to a fixed tube (6) and a rotating tube (7) that are parallel to each other. A gas spring assembly includes a gas spring (3), a pull cable (4) and a pull cable switch (5). The fixed end of the gas spring (3) is fixedly connected to the telescopic rod (2) through a gas spring fixing seat (12). The pull cable (4) connects the unlocking mechanism of the gas spring (3) and the pull cable switch (5). The footrest body is fixedly connected to the rotating tube (7) through a fixed sheet metal (8), and the fixed tube (6) is rigidly connected to the telescopic rod (2). The footrest body can be adjusted to near or far distance through the combined action of the telescopic rod assembly and the gas spring assembly. When the pull-wire switch (5) is operated, the gas spring (3) is unlocked by the pull wire (4), so that the foot rest body can be adjusted in angle around the axis of the rotating tube (7).

2. The structural device for adjusting the folding of the seat footrest according to claim 1, characterized in that: It also includes a seat (13), the telescopic rod base (1) is installed at the bottom of the seat (13), the rotating tube (7) is axially connected to the free end of the telescopic rod (2) and can rotate relative to it, and the fixed sheet metal (8) is a rigid plate coaxially fixed near the end of the rotating tube (7).

3. The structural device for adjusting the folding of the seat footrest according to claim 2, characterized in that: The extension and retraction direction of the gas spring (3) is consistent with and parallel to the extension and retraction direction of the telescopic rod (2), so that the telescopic rod (2) moves synchronously with the gas spring (3) during the adjustment process and maintains the supporting force on the footrest body.

4. The structural device for adjusting the folding of the seat footrest according to claim 2, characterized in that: The pull-cord switch (5) is detachably connected to the seat cushion, backrest or armrest of the seat (13).

5. The structural device for adjusting the folding of the seat footrest according to claim 2, characterized in that: The footrest body includes a large footrest (9) and a small footrest (10) connected by a torsion hinge (11). The large footrest (9) is fixedly connected to the rotating tube (7) by a fixed sheet metal (8). The torsion hinge (11) includes a first connecting plate (111) and a second connecting plate (112) that are hinged to each other. The first connecting plate (111) is fixedly connected to the large footrest (9), and the second connecting plate (112) is fixedly connected to the small footrest (10). The torsion hinge (11) has a built-in torsion spring to provide rotational damping, so that the small footrest (10) can unfold and remain stable relative to the large footrest (9) within a 180° rotation range.

6. The structural device for adjusting the folding of the seat footrest according to claim 2, characterized in that: The footrest body includes an integral footrest structure, which is fixedly connected to the rotating tube (7) through a fixed sheet metal (8) to achieve coordinated adjustment with the telescopic rod assembly and the gas spring assembly.

7. The structural device for adjusting the folding of the seat footrest according to any one of claims 2-6, characterized in that: It also includes a wire-controlled motor, which drives the unlocking valve of the gas spring (3) through a gear rack mechanism or a lead screw and nut mechanism. The control buttons of the wire-controlled motor are arranged on the seat cushion, backrest or armrest of the seat (13). The control buttons are electrically connected to the wire-controlled motor through wires.

Images