Extension leg rest and seat mechanical extension device with extension leg rest
By designing an extended leg rest device composed of multiple links, the problem of the leg rest of the elderly chair not being able to raise itself was solved, realizing stable support and easy shoe changing service for the elderly in TV position or lying position.
Patent Information
- Application Number
- CN202422970212.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing leg rests on elderly chairs cannot meet the needs of elderly people to raise their legs independently in a TV position or lying position, which increases the burden on the caregiver and concentrates the weight of the legs on the feet, resulting in excessive burden on the feet.
Design an extended leg support device, a mechanical extension device composed of multiple links, through the hinged relationship of the links, so that the leg support plate and foot support plate gradually unfold until they are flush, providing stable support, reducing leg weight, and reducing foot burden.
It allows the elderly to easily place themselves on the leg rest in a TV position or lying position, distributing the weight of their legs, reducing the burden on their feet, and making it easier for assistive caregivers to provide services.
Smart Images
Figure CN223554553U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to an extended leg rest and a seat mechanical extension device with an extended leg rest, and is mainly suitable for the design of a mechanical extension device of an old person's chair. BACKGROUND
[0002] The existing old person's chair leg rest usually adopts a common seat leg rest without considering the special needs of the elderly. Since the elderly are old and their body control ability and muscle strength are both decreased, it is difficult for the leg to be lifted by itself when the TV posture or lying posture needs to be changed by others, which increases the burden of the helper. In addition, a large part of the weight of the user's leg in the TV posture or lying posture is concentrated on the foot, which increases the burden of the foot. SUMMARY
[0003] The technical problem solved by the present application is to overcome the above-mentioned deficiencies in the prior art, and to provide an extended leg rest for assisting leg support and a seat mechanical extension device with an extended leg rest.
[0004] The technical solution adopted by the present application to solve the above technical problem comprises: an extended leg rest, characterized in that: the extended leg rest is composed of leg connecting rod one, leg connecting rod two, leg connecting rod three, leg connecting rod four, leg rest plate, leg connecting rod five, leg connecting rod six, leg connecting rod seven, leg connecting rod eight, foot rest plate and leg connecting rod nine, a guide rivet and a leg connecting rod two driving pin are arranged on the leg connecting rod two, one end of the leg connecting rod one and one end of the leg connecting rod two are respectively hinged to the front part of the seat mounting assembly, the other end of the leg connecting rod two is hinged to one end of the leg connecting rod four, the middle part of the leg connecting rod four is hinged to the middle part of the leg connecting rod one, the other end of the leg connecting rod four is hinged to one end of the leg connecting rod five, the middle part of the leg connecting rod five is hinged to the middle part of the leg connecting rod three, the other end of the leg connecting rod five is hinged to one end of the leg connecting rod seven, the leg rest plate is provided with a leg rest plate leg connecting rod three hinged shaft, a leg rest plate leg connecting rod seven hinged shaft, a leg rest plate leg connecting rod eight hinged shaft and a leg rest plate leg connecting rod nine hinged shaft, the other end of the leg connecting rod seven is hinged to the leg rest plate through the leg rest plate leg connecting rod seven hinged shaft, the leg connecting rod eight is installed on the leg rest plate through the leg rest plate leg connecting rod eight hinged shaft, one end of the leg connecting rod eight is hinged to the foot rest plate through a leg connecting rod eight foot rest plate hinged shaft, the foot rest plate is hinged to one end of the leg connecting rod nine through a leg connecting rod nine foot rest plate hinged shaft, the other end of the leg connecting rod nine is hinged to the leg rest plate through a leg rest plate leg connecting rod nine hinged shaft, the leg rest plate is hinged to one end of the leg connecting rod three through a leg rest plate leg connecting rod three hinged shaft, one end of the leg connecting rod six is hinged to the leg connecting rod three, the other end of the leg connecting rod six is hinged to the other end of the leg connecting rod eight, the other end of the leg connecting rod three is hinged to the other end of the leg connecting rod one. Through the above design, the leg rest plate and the foot rest plate are gradually unfolded when the extended leg rest is unfolded, until the upper planes of the leg rest plate and the foot rest plate are roughly aligned, so that the user's leg can be easily placed on the leg rest plate, the main weight of the leg is shared, the burden of the foot is reduced, and it is convenient for the helper to help the old person to change shoes, socks and the like.
[0005] The leg expansion limiting stop is provided on the third leg connecting rod and cooperates with the sixth leg connecting rod. The leg expansion limiting stop is in contact with the sixth leg connecting rod in the TV position and the lying position.
[0006] The upper surface of the leg rest plate and the upper surface of the foot rest plate are on the same horizontal plane in the TV position.
[0007] The technical solution of the application also includes a seat mechanical stretching device with an extended leg rest, comprising two mechanically stretching units arranged symmetrically left and right, a driving pipe assembly connecting the two mechanically stretching units, a lifting frame one and a lifting frame two, characterized in that each mechanically stretching unit is composed of a seat mounting assembly, a posture connecting rod one, a posture connecting rod two, an extended leg rest, a backrest mounting plate, a backrest support, a posture connecting rod three, a posture connecting rod four, a leg control connecting rod and a backrest driving part, the driving pipe assembly is rotatably mounted on the lifting frame two through a driving pipe mounting shaft, the rear side of the lifting frame one is hingedly connected to the base, the lifting frame two is hingedly connected to the front side of the lifting frame one through a lifting frame hinge shaft, the lifting frame two is provided with a driving pipe assembly rotation limiting stop, one end of the posture connecting rod one is hingedly connected to the seat mounting assembly, the other end of the posture connecting rod one is hingedly connected to the driving pipe assembly through a driving pipe hinge shaft, one end of the posture connecting rod two is hingedly connected to the backrest driving part, the other end of the posture connecting rod two is provided with a posture connecting rod two sliding groove, a guide rivet is sleeved in the posture connecting rod two sliding groove, the seat mounting assembly 5 is hingedly connected to the posture connecting rod three through a posture connecting rod three upper hinge shaft, the posture connecting rod three is hingedly connected to one end of the posture connecting rod four through a posture connecting rod three middle hinge shaft, the other end of the posture connecting rod four is fixed to the lifting frame two through a posture connecting rod four mounting shaft, the backrest driving part is mounted on the lifting frame two, one end of the leg control connecting rod is hingedly connected to the second leg connecting rod through a leg connecting rod two driving pin, the other end of the leg control connecting rod is mounted on the backrest driving part, the rear end of the backrest driving part is hingedly connected to one end of the backrest support, the other end of the backrest support is hingedly connected to the backrest mounting plate, and the backrest mounting plate is hingedly connected to the seat mounting assembly.
[0008] The guide rivet is close to the front upper side of the posture connecting rod two sliding groove in the lying position.
[0009] Compared with the prior art, the application has the following advantages and effects: the user's legs can be easily placed on the leg rest plate, sharing the main weight of the legs and reducing the burden on the feet. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 is a sitting position three-dimensional schematic diagram of the seat mechanical stretching device of the embodiment of the application Figure 1 .
[0011] Figure 2 is a sitting position three-dimensional schematic diagram of the seat mechanical stretching device of the embodiment of the application Figure 2 .
[0012] Figure 3 is a TV posture of the mechanical stretching device of the seat embodiment of the present application Figure 1 .
[0013] Figure 4 is a TV posture of the mechanical stretching device of the seat embodiment of the present application
[0014] Figure 5 is a TV posture of the mechanical stretching device of the seat embodiment of the present application Figure 2 .
[0015] Figure 6 is a TV posture of the mechanical stretching device of the seat embodiment of the present application Figure 1 .
[0016] Figure 7 is a TV posture of the mechanical stretching device of the seat embodiment of the present application
[0017] Figure 8 is a TV posture of the mechanical stretching device of the seat embodiment of the present application Figure 2 .
[0018] In the figure: base 1, drive pipe assembly 2, drive pipe hinge shaft 21, drive pipe mounting shaft 22, lifting frame one 3, lifting frame hinge shaft 34, lifting frame two 4, drive pipe assembly rotation limit 41, seat mounting assembly 5, limit bushing 51, lifting connecting rod 6, posture connecting rod one 7, posture connecting rod two 8, posture connecting rod two sliding groove 81, extension leg rest 9, leg connecting rod one 91, leg connecting rod two 92, guide rivet 921, leg connecting rod two drive pin 922, leg connecting rod three 93, leg part unfolding limit 931, leg connecting rod four 94, leg rest plate 95, leg rest plate leg connecting rod three hinge shaft 951, leg rest plate leg connecting rod seven hinge shaft 952, leg rest plate leg connecting rod eight hinge shaft 953, leg rest plate leg connecting rod nine hinge shaft 954, leg connecting rod five 96, leg connecting rod six 97, leg connecting rod six leg connecting rod eight hinge shaft 971, leg connecting rod seven 98, leg connecting rod eight 99, leg connecting rod eight foot rest plate hinge shaft 991, foot rest plate 100, leg connecting rod nine 101, leg connecting rod nine foot rest plate hinge shaft 1011, backrest mounting plate 11, backrest support 12, posture connecting rod three 13, posture connecting rod three upper hinge shaft 131, posture connecting rod three middle hinge shaft 132, posture connecting rod four 14, posture connecting rod four mounting shaft 141, leg part control connecting rod 15, backrest drive member 16. DETAILED DESCRIPTION
[0019] The present application will be further described in detail below in conjunction with the accompanying drawings and through embodiments. The following embodiments are an explanation of the present application and the present application is not limited to the following embodiments. Figure 4 In the figure, left is front and right is back.
[0020] Referring to Figures 1 to 8The mechanical stretching device of the seat comprises two mechanical stretching units arranged in left-right symmetry, and a driving pipe assembly 2, a lifting frame one 3 and a lifting frame two 4 connecting the two mechanical stretching units. Each mechanical stretching unit comprises a seat mounting assembly 5, a posture link one 7, a posture link two 8, an extension leg rest 9, a backrest mounting plate 11, a backrest support 12, a posture link three 13, a posture link four 14, a leg control link 15 and a backrest driving member 16. The driving pipe assembly 2 is rotatably installed on the lifting frame two 4 through a driving pipe mounting shaft 22. The rear side of the lifting frame one 3 is hingedly connected to the base 1. The lifting frame two 4 is hingedly connected to the front side of the lifting frame one 3 through a lifting frame hinge shaft 34. The lifting frame two 4 is provided with a driving pipe assembly rotation limiting part 41. The seat mounting assembly 5 is provided with a limiting bushing 51. One end of the posture link one 7 is hingedly connected to the seat mounting assembly 5. The other end of the posture link one 7 is hingedly connected to the driving pipe assembly 2 through a driving pipe hinge shaft 21. One end of the posture link two 8 is hingedly connected to the backrest driving member 16. The other end of the posture link two 8 is provided with a posture link two sliding groove 81. The seat mounting assembly 5 is hingedly connected to the posture link three 13 through a posture link three upper hinge shaft 131. The limiting bushing 51 cooperates with the posture link three 13. The posture link three 13 is hingedly connected to one end of the posture link four 14 through a posture link three middle hinge shaft 132. The other end of the posture link four 14 is fixed to the lifting frame two 4 through a posture link four mounting shaft 141. The backrest driving member 16 is fixedly installed on the lifting frame two 4. One end of the leg control link 15 is hingedly connected to a leg link two 92. The other end of the leg control link 15 is hingedly connected to the backrest driving member 16. The backrest driving member 16 is connected to one end of the backrest support 12. The other end of the backrest support 12 is hingedly connected to the backrest mounting plate 11. The backrest mounting plate 11 is hingedly connected to the seat mounting assembly 5.The main improvement of the present application with respect to the prior art is the extension leg rest 9, which includes leg link one 91, leg link two 92, leg link three 93, leg link four 94, leg rest plate 95, leg link five 96, leg link six 97, leg link seven 98, leg link eight 99, foot rest plate 100, and leg link nine 101. One end of the leg link one 91 and one end of the leg link two 92 are both mounted on the front part of the seat mounting assembly 5. The leg link two 92 is provided with a guide rivet 921 and a leg link two driving pin 922. The posture link two sliding groove 81 is sleeved on the guide rivet 921. One end of the leg part control link 15 is hinged to the leg link two 92 through the leg link two driving pin 922. The other end of the leg link two 92 is hinged to one end of the leg link four 94. The middle part of the leg link four 94 is hinged to the middle part of the leg link one 91. The other end of the leg link four 94 is hinged to one end of the leg link five 96. The middle part of the leg link five 96 is hinged to the middle part of the leg link three 93. The other end of the leg link five 96 is hinged to one end of the leg link seven 98. The leg rest plate 95 is provided with a leg rest plate leg link three hinged shaft 951, a leg rest plate leg link seven hinged shaft 952, a leg rest plate leg link eight hinged shaft 953, and a leg rest plate leg link nine hinged shaft 954. The other end of the leg link seven 98 is hinged to the leg rest plate 95 through the leg rest plate leg link seven hinged shaft 952. The leg link eight 99 is mounted on the leg rest plate 95 through the leg rest plate leg link eight hinged shaft 953. One end of the leg link eight 99 is hinged to the foot rest plate 100 through a leg link eight foot rest plate hinged shaft 991. The foot rest plate 100 is hinged to one end of the leg link nine 101 through a leg link nine foot rest plate hinged shaft 1011. The other end of the leg link nine 101 is hinged to the leg rest plate 95 through the leg rest plate leg link nine hinged shaft 954. The leg rest plate 95 is hinged to one end of the leg link three 93 through the leg rest plate leg link three hinged shaft 951. One end of the leg link six 97 is hinged to the leg link three 93. The other end of the leg link six 97 is hinged to the other end of the leg link eight 99. The other end of the leg link three 93 is hinged to the other end of the leg link one 91. The leg rest plate 95, the leg link six 97, the leg link seven 98, the leg link eight 99, the foot rest plate 100, and the leg link nine 101 are designed in a connection relationship, so that when the extension leg rest 9 is unfolded, the leg rest plate 95 and the foot rest plate 100 are both gradually unfolded until the upper planes of the two are roughly aligned (the same angle with the upper plane, see. Figure 4 ), so that the user's legs can be easily placed on the leg rest plate 95, sharing the main weight of the legs and reducing the burden on the feet, making it convenient for caregivers to help the elderly change shoes, wear socks, and the like.
[0021] The leg link three 93 is provided with a leg unfolding limit 931, which cooperates with the leg link six 97. When the TV posture or the lying posture is adopted, the leg unfolding limit 931 touches the leg link six 97.
[0022] The main posture change process of the embodiment of the present application is as follows:
[0023] Referring to Figures 1 to 5 When the TV posture is changed from the sitting posture, the driving device drives the driving tube 2 to move backward as a whole and rotate backward around the driving tube mounting shaft 22, thereby driving the posture link one 7 and the seat mounting assembly 5 to move backward, and the seat mounting assembly 5 drives the leg link two 92 to rotate around the leg link two driving pin 922, the lower end of the leg link two 92 moves forward and upward relatively, and drives the extended leg rest 9 to unfold; when the limiting bushing 51 touches the posture link three 13, the extended leg rest 9 is fully opened and enters the TV posture state. When the head of the driving device continues to shrink backward, the posture link one 7 drives the seat mounting assembly 5 to continue to move backward and upward, drives the upper end of the backrest mounting plate 11 to rotate downward, and at the same time, drives the front part of the extended leg rest 9 to be slightly upward, the guide rivet 921 is lifted and moves upward along the posture link two sliding groove 81; when the guide rivet 921 is lifted to the front part (the upper front part, see Figure 7 ) of the posture link two sliding groove 81, the backrest mounting plate 11 is tilted downward to the position, and the TV posture is changed to the lying posture. The reverse action of the above process is the process of changing from the lying posture to the TV posture and then to the sitting posture, which will not be described in detail.
[0024] The parts not described in detail in the present application are prior art.
Claims
1. An extendable legrest characterized by: The extension leg rest is composed of leg connecting rod one, leg connecting rod two, leg connecting rod three, leg connecting rod four, leg rest plate, leg connecting rod five, leg connecting rod six, leg connecting rod seven, leg connecting rod eight, foot rest plate and leg connecting rod nine. The leg connecting rod two is provided with a guide rivet and a leg connecting rod two driving pin. One end of the leg connecting rod one and one end of the leg connecting rod two are respectively hinged at the front of the seat mounting assembly. The other end of the leg connecting rod two is hinged with one end of the leg connecting rod four. The middle part of the leg connecting rod four is hinged with the middle part of the leg connecting rod one. The other end of the leg connecting rod four is hinged with one end of the leg connecting rod five. The middle part of the leg connecting rod five is hinged with the middle part of the leg connecting rod three. The other end of the leg connecting rod five is hinged with one end of the leg connecting rod seven. The leg rest plate is provided with a leg rest plate leg connecting rod three hinged shaft, a leg rest plate leg connecting rod seven hinged shaft, a leg rest plate leg connecting rod eight hinged shaft and a leg rest plate leg connecting rod nine hinged shaft. The other end of the leg connecting rod seven is hinged with the leg rest plate through the leg rest plate leg connecting rod seven hinged shaft. The leg connecting rod eight is installed on the leg rest plate through the leg rest plate leg connecting rod eight hinged shaft. One end of the leg connecting rod eight is hinged with the foot rest plate through a leg connecting rod eight foot rest plate hinged shaft. The foot rest plate is hinged with one end of the leg connecting rod nine through a leg connecting rod nine foot rest plate hinged shaft. The other end of the leg connecting rod nine is hinged with the leg rest plate through a leg rest plate leg connecting rod nine hinged shaft. The leg rest plate is hinged with one end of the leg connecting rod three through a leg rest plate leg connecting rod three hinged shaft. One end of the leg connecting rod six is hinged with the leg connecting rod three. The other end of the leg connecting rod six is hinged with the other end of the leg connecting rod eight. The other end of the leg connecting rod three is hinged with the other end of the leg connecting rod one.
2. The extension leg rest of claim 1 wherein: The leg connecting rod three is provided with a leg unfolding limiting part. The leg unfolding limiting part is matched with the leg connecting rod six. The leg unfolding limiting part is in contact with the leg connecting rod six in the TV posture and the lying posture.
3. The extension leg rest of claim 1 wherein: The upper surface of the leg rest plate and the upper surface of the foot rest plate are in the same horizontal plane in the TV posture.
4. A mechanical stretching device for a seat, comprising two mechanical stretching units arranged in a left-right symmetrical configuration, a driving pipe assembly connecting the two mechanical stretching units, a lifting frame I, and a lifting frame II, characterized in that: Each mechanical stretching unit is composed of the seat mounting assembly, the posture connecting rod one, the posture connecting rod two, the backrest mounting plate, the backrest support, the posture connecting rod three, the posture connecting rod four, the leg control connecting rod, the backrest driving part and the extension leg rest as claimed in any one of claims 1-3. The driving pipe assembly is rotatably installed on the lifting frame two through a driving pipe installation shaft. The lifting frame one rear side is hinged on the base. The lifting frame two is hinged with the lifting frame one front side through a lifting frame hinged shaft. The lifting frame two is provided with a driving pipe assembly rotation limiting part. One end of the posture connecting rod one is hinged on the seat mounting assembly. The other end of the posture connecting rod one is hinged with the driving pipe assembly through a driving pipe hinged shaft. One end of the posture connecting rod two is hinged on the backrest driving part. The other end of the posture connecting rod two is provided with a posture connecting rod two sliding groove. The guide rivet is sleeved in the posture connecting rod two sliding groove. The seat mounting assembly (5) is hinged with the posture connecting rod three through a posture connecting rod three upper hinged shaft. The posture connecting rod three is hinged with one end of the posture connecting rod four through a posture connecting rod three middle hinged shaft. The other end of the posture connecting rod four is fixed on the lifting frame two through a posture connecting rod four installation shaft. The backrest driving part is installed on the lifting frame two. One end of the leg control connecting rod is hinged with the leg connecting rod two through a leg connecting rod two driving pin. The other end of the leg control connecting rod is installed on the backrest driving part. The backrest driving part rear end is hinged with one end of the backrest support. The other end of the backrest support is hinged with the backrest mounting plate. The backrest mounting plate is hinged with the seat mounting assembly.
5. The mechanical seat extension device of claim 4, wherein: The guiding rivet is close to the upper front of the posture connecting rod in the lying position.