Linkage device for automatically folding and unfolding pedal plate and cushion of building chair

Abstract

The utility model discloses a linkage device for automatically folding and unfolding a foot rest and a cushion of a building chair, which comprises a fixed seat, a first bearing seat arranged at the top of the fixed seat, and a second bearing seat arranged at the bottom of the fixed seat; the cushion is fixedly connected with the first shaft, and the first shaft penetrates through the first bearing seat; the pedal plate is fixedly connected with the second shaft, and the second shaft is arranged on the second bearing seat in a penetrating mode; the push rod is fixed to the fixing base, the tail end of a piston of the push rod is connected with a transmission piece, the transmission piece is arranged on the second shaft in a sleeving mode, and the transmission piece further abuts against the bottom of the pedal, so that when the piston stretches out, the transmission piece can jack up the pedal; one end of the steel cable is connected with the tail end of the piston, and the other end of the steel cable is connected with the cushion, so that when the piston extends out, the steel cable can pull up the cushion. By means of the structure, linkage of the cushion and the pedal plate can be achieved through combination of the push rod and the steel cable, and great convenience is brought to use of operators.

Description

Technical Field

[0001] The utility model relates to a building chair auxiliary device, in particular to a linkage device for automatically retracting and extending a foot pedal and a seat cushion of a building chair. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] A stair chair, also known as a stair climbing chair, is a seat that can be automatically moved up and down and installed on the side of the stairs. It is mainly used to help people with mobility problems to go up and down the stairs. Driven by an electric motor as a power source, the stair chair can slide along a specified trajectory relative to the stairs. It has safety features such as seat belt protection and automatic stop when encountering obstacles. It is designed to improve the quality of life of the elderly and people with limited mobility, allowing them to use stairs more conveniently and safely.

[0004] Most existing stair chairs include a seat cushion for sitting and a footrest for feet. For the purpose of space utilization, the seat cushion and the footrest need to be folded and retracted when the stair chair is not in use to avoid affecting people who normally use the stairs. When in use, the seat cushion and the footrest need to be flattened and retracted by hand, which is troublesome to use and affects the quality of life of the elderly and people with mobility difficulties.

[0005] There is currently no linkage device for automatically retracting and releasing the footrest and seat cushion of a building chair that can solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a linkage device for automatically retracting and extending the foot pedal and seat cushion of a floor chair. The linkage between the seat cushion and the foot pedal can be achieved through the combination of a push rod and a steel cable, which greatly facilitates the use of operators.

[0007] In order to achieve the above-mentioned purpose, the utility model discloses the following linkage device for automatically retracting and extending the foot pedal and seat cushion of a floor chair; the linkage device for automatically retracting and extending the foot pedal and seat cushion of a floor chair comprises:

[0008] A fixing seat, wherein the top of the fixing seat comprises a first bearing seat, and the bottom of the fixing seat comprises a second bearing seat;

[0009] A seat cushion, wherein the seat cushion is fixedly connected to the first shaft, and the first shaft is passed through the first bearing seat;

[0010] A foot pedal, wherein the foot pedal is fixedly connected to the second shaft, and the second shaft is passed through the second bearing seat;

[0011] A push rod, the push rod is fixed on the fixing seat and is arranged between the seat cushion and the foot pedal. A transmission sheet is connected to the piston end of the push rod. The transmission sheet is sleeved on the second shaft, and a side of the transmission sheet away from the piston abuts against the bottom of the foot pedal, so that when the piston is extended, the transmission sheet can lift the foot pedal and the foot pedal rotates around the second bearing seat.

[0012] A steel cable, one end of which is connected to the end of the piston, and the other end of which is connected to the seat cushion, so that when the piston is extended, the steel cable can cause the seat cushion to rotate around the first bearing seat and be pulled up.

[0013] Furthermore, a movement trajectory of a connection point between the steel cable and the seat cushion does not intersect with an axial direction of the first shaft.

[0014] Furthermore, the motion trajectories of the contact point between the transmission plate and the foot pedal and the connection point between the transmission plate and the push rod do not intersect with the axial direction of the second shaft.

[0015] Furthermore, it also includes a fixing sleeve, which is fixed on the fixing seat, the steel cable is passed through the fixing sleeve, and the steel cable can slide relative to the fixing sleeve.

[0016] Furthermore, it also includes a third shaft, and the fixed seat also includes a third bearing seat, the third bearing seat is fixedly arranged on the top of the fixed seat, the third shaft passes through the third bearing seat, the third bearing seat is arranged on the side of the top of the fixed seat away from the first bearing seat, and the steel cable is wrapped around the third shaft.

[0017] Furthermore, the bottom of the seat cushion includes a groove wheel, the seat cushion is sleeved on the first shaft through the groove wheel, and the steel cable is connected to the seat cushion after passing through the groove wheel.

[0018] Furthermore, the outer periphery of the sheave has an inner groove matching the size of the steel cable, so that the steel cable is limited at the outer periphery of the sheave.

[0019] Furthermore, two first bearing seats are included, and the two first bearing seats are arranged on the same side of the top of the fixing seat.

[0020] Furthermore, two second bearing seats are included, and the two second bearing seats are arranged on the same side of the bottom of the fixing seat.

[0021] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0022] The utility model discloses a linkage device for automatically retracting and extending the foot pedal and the seat cushion of the building chair, which can directly push the transmission plate to lift the foot pedal through the push rod, and the steel cable connected to the push rod can pull up the seat cushion. Compared with the existing manual operation of the seat cushion and the foot pedal, the quality of life of the elderly and the disabled is greatly improved, and the seat cushion and the foot pedal are synchronously linked, which has high utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a side view of a linkage device for automatically retracting and extending a footrest and a seat cushion of a floor chair provided in an embodiment of the present specification;

[0025] Figure 2 It is a top-direction stereogram of a linkage device for automatically retracting and extending a footrest and a seat cushion of a floor chair provided in an embodiment of the present specification;

[0026] In the figure: 1, fixed seat; 11, first bearing seat; 12, second bearing seat; 2, seat cushion; 21, first shaft; 3, foot pedal; 31, second shaft; 4, push rod; 41, transmission plate; 5, steel cable; 6, fixed sleeve; 7, third bearing seat; 8, groove wheel. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0029] See also Figure 1-2 , is a linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair in this embodiment; wherein the linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair includes:

[0030] A fixed seat 1, wherein the top of the fixed seat 1 includes a first bearing seat 11, and the bottom of the fixed seat 1 includes a second bearing seat 12;

[0031] The seat cushion 2 is fixedly connected to the first shaft 21, and the first shaft 21 is passed through the first bearing seat 11;

[0032] A foot pedal 3, the foot pedal 3 is fixedly connected to the second shaft 31, and the second shaft 31 is passed through the second bearing seat 12;

[0033] Push rod 4, push rod 4 is fixed on the fixed seat 1, and push rod 4 is arranged at a position between the seat cushion 2 and the foot pedal 3, the piston end of push rod 4 is connected with transmission sheet 41, transmission sheet 41 is sleeved on the second shaft 31, and the side of transmission sheet 41 away from the piston is abutted against the bottom of the foot pedal 3, so that when the piston is extended, transmission sheet 41 can lift up the foot pedal 3, and the foot pedal 3 rotates around the second bearing seat 12;

[0034] The steel cable 5 has one end connected to the end of the piston and the other end connected to the seat cushion 2, so that when the piston is extended, the steel cable 5 can make the seat cushion 2 rotate around the first bearing seat 11 and be pulled up.

[0035] Through the above structure, when the seat cushion 2 and the footrest 3 need to be retracted during use, the operator only needs to start the push rod 4, and then the piston of the push rod 4 works outward. The transmission piece 41 connected to one end of the piston of the push rod 4 is sleeved and fixed on the second shaft 31. Therefore, the transmission piece 41 can drive the second shaft 31 to rotate around the second bearing seat 12 under the push of the piston, so that the transmission piece 41 rotates counterclockwise (with the other end of the transmission piece 41 on the other side of the second bearing seat 12) Figure 1The other end of the transmission plate 41 is in contact with the bottom side of the footrest 3. Therefore, when the other end of the transmission plate 41 rotates, the footrest 3 is lifted up, so that the footrest 3 and the second shaft 31 rotate around the second bearing seat 12. The footrest 3 is lifted up and vertically fits with the fixed seat 1. At this point, the retraction of the footrest 3 is completed. Synchronously, when the piston of the push rod 4 extends outward, the end of the steel cable 5 is connected to the piston, and the push rod 4 is arranged between the seat cushion 2 and the footrest 3. In other words, the piston of the push rod 4 pulls the steel cable 5 away from the seat cushion 2. Since the seat cushion 2 and the first shaft 21 are movably connected with the first bearing seat 11 of the fixed seat 1, the seat cushion 2 is pulled up, and the seat cushion 2 is lifted up and vertically placed above the fixed seat 1. At this point, the retraction of the seat cushion 2 is completed. Similarly, if the operator wants to put down the seat cushion 2 and the footrest 3, the piston of the push rod 4 can be started to work inward, so that the piston is retracted into the push rod 4. In this process, the other end of the transmission plate 41 on the other side of the second bearing seat 12 rotates clockwise (by Figure 1 The other end of the transmission plate 41 is in contact with the bottom side of the footrest 3. Therefore, the footrest 3 slowly falls down when the other end of the transmission plate 41 rotates, so that the footrest 3 and the second shaft 31 rotate around the second bearing seat 12, and the footrest 3 falls down and is completely separated from the fixed seat 1. At this point, the lowering action of the footrest 3 is completed. At the same time, synchronously, when the piston of the push rod 4 retracts inward, since the end of the steel cable 5 is connected to the piston, the piston of the push rod 4 releases the steel cable 5 in the direction of the seat cushion 2. Since the seat cushion 2 and the first shaft 21 are movably connected to the first bearing seat 11 of the fixed seat 1, the seat cushion 2 slowly falls down in the presence of the redundant steel cable 5. The seat cushion 2 falls down and is placed flat on the top of the fixed seat 1. At this point, the lowering action of the seat cushion 2 is completed.

[0036] In the above-mentioned use process, the retraction of the seat cushion 2 and the retraction of the foot pedal 3, as well as the lowering of the seat cushion 2 and the lowering of the foot pedal 3, are all performed synchronously, and the above-mentioned retraction and lowering steps can be realized only through the workmanship of the push rod 4. Compared with the existing method of lowering and retracting the seat cushion 2 and the foot pedal 3 by hand, it significantly saves the operator's physical strength. In the case where the operator is generally an elderly person or a person with limited mobility, the push rod 4 can be directly operated to control the seat cushion 2 and the foot pedal 3 by sending instructions through an external button, etc., which is easy to operate and significantly improves its use experience. At the same time, the lowering and retraction of the seat cushion 2 and the foot pedal 3 are performed synchronously, with high efficiency and fast response speed, and high use efficiency.

[0037] Furthermore, the operator can directly issue commands to the push rod 4 through a remote controller wirelessly connected to the driving device of the push rod 4, or a physical button electrically connected to the push rod 4, and the control unit such as the remote controller or button is arranged near the fixed seat 1, so that the operator can intuitively control the lowering and retraction of the seat cushion 2 and the footrest 3. Figure 1 For example, when the seat 2 and the foot pedal 3 are lowered, they rotate in a clockwise direction at the same time. When the seat 2 and the foot pedal 3 are retracted, they rotate in a counterclockwise direction at the same time.

[0038] Furthermore, the motion trajectory of the connection point between the steel cable 5 and the seat cushion 2 does not intersect with the axial direction of the first shaft 21, and the motion trajectory of the contact point between the transmission plate 41 and the foot pedal 3 and the connection point between the transmission plate 41 and the push rod 4 do not intersect with the axial direction of the second shaft 31. Specifically, through the arrangement of the above structure, when the push rod 4 is working, when the pulling direction path of the steel cable 5 does not pass through the axial direction of the first shaft 21, the seat cushion 2 can be effectively pulled up or lowered under the action of the steel cable 5. Similarly, when the motion trajectory of the contact point between the transmission plate 41 and the foot pedal 3 and the connection point between the transmission plate 41 and the push rod 4 do not intersect with the axial direction of the second shaft 31, the transmission plate 41 can rotate around the second shaft 31 under the action of the piston of the push rod 4, so that the transmission plate 41 can push up or lower the foot pedal 3 to avoid damage to components.

[0039] Furthermore, if Figure 1 As shown, it also includes a fixing sleeve 6, which is fixed on the fixing seat 1, and the steel cable 5 is inserted through the fixing sleeve 6, and the steel cable 5 can slide relative to the fixing sleeve 6. Through the setting of the fixing sleeve 6, the steel cable 5 as the main transmission mechanism can be limited on one side of the fixing seat 1, so that the steel cable 5 transmits force to the seat cushion 2 and the foot pedal 3 along a stable path, avoiding the unstable lifting and lowering of the seat cushion 2 caused by the shaking of the steel cable 5 during the pulling process of the push rod 4 on the steel cable 5, and preventing accidents.

[0040] Furthermore, if Figure 1-2 As shown, the third shaft is also included, and the fixed seat 1 also includes a third bearing seat 7. The third bearing seat 7 is fixedly arranged on the top of the fixed seat 1. The third shaft is passed through the third bearing seat 7. The third bearing seat 7 is arranged on the side of the top of the fixed seat 1 away from the first bearing seat 7, and the steel cable 5 is wound around the third shaft. Through the arrangement of the third shaft and the third bearing seat 7 matched therewith, the steel cable 5 is not connected straightly between the seat cushion 2 and the push rod 4, but is transmitted through the third bearing seat 7 which is in the same position as the first shaft 21 at the bottom of the seat cushion 2, so that the stability of the force transmission of the steel cable 5 is improved.

[0041] Furthermore, the bottom of the seat cushion 2 includes a sheave 8, and the seat cushion 2 is sleeved on the first shaft 21 through the sheave 8, and the steel cable 5 is connected to the seat cushion 2 after passing through the sheave 8. At the same time, the outer periphery of the sheave 8 has an inner groove matching the size of the steel cable 5, so that the steel cable 5 is limited to the outer periphery of the sheave 8. Specifically, through the arrangement of the sheave 8, the main body of the steel cable 5 adjacent to the seat cushion 2 can be embedded and arranged on the outer periphery of the fixing sleeve 6. Under the pulling of the push rod 4, the steel cable 5 is pulled on the seat cushion 2. The force is evenly distributed on the outer wall of the sheave 8, which helps to improve the stability of the force transmission of the steel cable 5, and the pulling effect of the steel cable 5 on the seat cushion 2 is better, stable and uniform.

[0042] Furthermore, two first bearing seats 11 are included, and the two first bearing seats 11 are arranged on the same side of the top of the fixing seat 1. At the same time, two second bearing seats 12 are included, and the two second bearing seats 12 are arranged on the same side of the bottom of the fixing seat 1. In other words, the two ends of the first shaft 21 at the bottom of the seat cushion 2 are respectively sleeved on the positions of the two first bearing seats 11, and the two ends of the second shaft 31 at the bottom of the foot pedal 3 are respectively sleeved on the positions of the two second bearing seats 12, so that the transverse shaft has a better fixing effect on the seat cushion 2 and the foot pedal 3, which helps to improve the stability of the seat cushion 2 and the foot pedal 3 during rotation.

[0043] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described in the industry standards or embodiments, etc. Some industry standards or slightly modified implementation plans based on the implementation of the custom methods or embodiments can also achieve the same, equivalent or similar, or predictable implementation effects after deformation of the above embodiments. The embodiments of data acquisition, processing, output, judgment methods, etc. after these modifications or deformations can still fall within the scope of the optional implementation plans of this application.

[0044] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present application without departing from the spirit of the present application. It is intended that the attached embodiments include these modifications and changes without departing from the present application.

Claims

1. A linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair; characterized in that: The linkage device for automatically retracting and extending the footrest and seat cushion of the floor chair comprises: A fixing seat, wherein the top of the fixing seat comprises a first bearing seat, and the bottom of the fixing seat comprises a second bearing seat; A seat cushion, wherein the seat cushion is fixedly connected to the first shaft, and the first shaft is passed through the first bearing seat; A foot pedal, wherein the foot pedal is fixedly connected to the second shaft, and the second shaft is passed through the second bearing seat; A push rod, the push rod is fixed on the fixing seat and is arranged between the seat cushion and the foot pedal. A transmission sheet is connected to the piston end of the push rod. The transmission sheet is sleeved on the second shaft, and a side of the transmission sheet away from the piston abuts against the bottom of the foot pedal, so that when the piston is extended, the transmission sheet can lift the foot pedal and the foot pedal rotates around the second bearing seat. A steel cable, one end of which is connected to the end of the piston, and the other end of which is connected to the seat cushion, so that when the piston is extended, the steel cable can cause the seat cushion to rotate around the first bearing seat and be pulled up.

2. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1, characterized in that: The movement trajectory of the connection point between the steel cable and the seat cushion does not intersect with the axial direction of the first shaft.

3. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1 is characterized in that: The motion trajectory of the contact point between the transmission plate and the foot pedal and the connection point between the transmission plate and the push rod do not intersect with the axial direction of the second shaft.

4. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1, characterized in that: It also includes a fixing sleeve, which is fixed on the fixing seat, and the steel cable is passed through the fixing sleeve, and the steel cable can slide relative to the fixing sleeve.

5. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1, characterized in that: It also includes a third shaft, and the fixed seat also includes a third bearing seat, the third bearing seat is fixedly arranged on the top of the fixed seat, the third shaft passes through the third bearing seat, the third bearing seat is arranged on the side of the top of the fixed seat away from the first bearing seat, and the steel cable is wrapped around the third shaft.

6. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1, characterized in that: The bottom of the seat cushion comprises a groove wheel, the seat cushion is sleeved on the first shaft through the groove wheel, and the steel cable is connected to the seat cushion after passing through the groove wheel.

7. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 6, characterized in that: The outer periphery of the groove wheel has an inner groove matching the size of the steel cable, so that the steel cable is restricted at the outer periphery of the groove wheel.

8. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1, characterized in that: A total of two first bearing seats are included, and the two first bearing seats are arranged on the same side of the top of the fixing seat.

9. The linkage device for automatically retracting and extending the footrest and seat cushion of a floor chair according to claim 1, characterized in that: A total of two second bearing seats are included, and the two second bearing seats are arranged on the same side of the bottom of the fixing seat.

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