Power-assisted mechanism and seat
By using elastic components in the sofa's power assist mechanism to provide power to the drive shaft, the inefficiency problem caused by the lack of assist in the stretching and retraction of the existing sofa footrest is solved, achieving higher driving efficiency and more stable operation.
Patent Information
- Application Number
- CN202420836496.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-19
AI Technical Summary
During the extension and retraction of the foot support, the existing sofas with functional adjustment rely entirely on the driving force of the driving mechanism, and lack the help of the supporting mechanism, resulting in low working efficiency.
A power assist mechanism is designed, including a mount, drive shaft and elastic assembly. The drive shaft drives the elastic assembly to rotate, and the elastic assembly applies the opposite torque of the drive shaft on both sides of the critical position to provide power and make the drive shaft more efficient.
Through the use of the power support mechanism, the driving efficiency of the foot support during the stretching and retraction process is improved, the motor driving load is reduced, and the manual driving solution is more labor-saving, while improving the stability and reliability of the open and closed positions.
Smart Images
Figure CN222584057U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of home furnishing technology, and in particular to a power-assisting mechanism and a seat. Background Art
[0002] With the development of the home furnishing industry, people have more and more requirements for the functions of seating. At present, the footrest of the sofa with functional adjustment can be extended by the driving mechanism to support the legs of the occupant in the lying state, and the footrest is retracted in the sitting state. The extension and retraction process of the footrest completely relies on the driving force of the driving mechanism, lacks the assistance of the power-assisting mechanism, and the working efficiency is relatively low. Utility Model Content
[0003] The present application provides a power-assisting mechanism and a seat, which can assist the extension and retraction of a footrest, have a simple structure and operation, and effectively improve work efficiency.
[0004] In a first aspect, the present application provides a power assist mechanism, including a mounting seat, and further comprising:
[0005] A driving shaft, rotatably connected to the mounting seat, for driving the footrest to move;
[0006] An elastic component, one end of which is fixedly connected to the driving shaft, and the other end of which is connected to the mounting seat;
[0007] In the process where the drive shaft drives the elastic component to rotate, the elastic component has a critical position relative to the drive shaft, and the elastic component applies opposite torques to the drive shaft on both sides of the critical position.
[0008] By adopting the above technical solution, the elastic component has a critical position relative to the drive shaft. The elastic components on both sides of the critical position can assist the drive shaft in rotating, thereby making the drive shaft more efficient, making the motor drive solution drive load smaller, and making the manual drive solution more labor-saving.
[0009] In combination with the first aspect, in a further solution, the elastic component has two stable positions, the two stable positions are an open position and a closed position, and the critical position is located between the open position and the closed position.
[0010] By adopting the above technical solution, the elastic component can provide opposite torques in the disengagement direction to the drive shaft in the open position and the closed position, so that the drive shaft is more stable in the open position and the closed position.
[0011] In combination with the first aspect, in a further solution, when the drive shaft rotates in the positive direction to drive the elastic component to move from the open position to the critical position, the elastic component applies a negative torque to the drive shaft.
[0012] By adopting the above technical solution, the elastic component can provide the drive shaft in the open position with an opposite torque in the direction of rotation toward the retracted position, so that the drive shaft is more stable in the open position, and the stability and reliability of the open position are improved.
[0013] In combination with the first aspect, in a further solution, when the drive shaft rotates in the positive direction to drive the elastic component to move from the critical position to the closed position, the elastic component applies a positive torque to the drive shaft.
[0014] By adopting the above technical solution, when the drive shaft rotates in the positive direction to drive the elastic component to move from the critical position to the closed position, the elastic component can increase the rotational torque of the drive shaft in the direction of the closed position, making the closing of the drive shaft smoother and more labor-saving.
[0015] In combination with the first aspect, in a further solution, when the drive shaft rotates negatively to drive the elastic component to move from the closed position to the critical position, the elastic component applies a positive torque to the drive shaft.
[0016] By adopting the above technical solution, the elastic component can provide the drive shaft with a torque in the opposite direction of rotation to the open position in the closed position, so that the drive shaft is more stable in the closed position, and the stability and reliability of the closed position are improved.
[0017] In combination with the first aspect, in a further solution, when the drive shaft rotates negatively to drive the elastic component to move from the critical position to the open position, the elastic component applies a negative torque to the drive shaft.
[0018] By adopting the above technical solution, when the drive shaft rotates negatively to drive the elastic component to move from the critical position to the open position, the elastic component can increase the rotational torque of the drive shaft in the direction of the open position, making the opening of the drive shaft smoother and more labor-saving.
[0019] In combination with the first aspect, a further solution is that the elastic component includes a fixing member, a connecting member and a reset member, the fixing member is fixedly connected to the driving shaft, one end of the fixing member away from the driving shaft is hinged to the connecting member, one end of the reset member is connected to the mounting seat, and the other end is connected to an end of the connecting member away from the fixing member.
[0020] By adopting the above technical solution, the driving shaft rotates and the fixing member rotates synchronously, and the fixing member drives the connecting member to rotate. During the rotation of the connecting member, the reset member always applies a pulling force to the connecting member. The pulling force of the reset member is converted into a torque of the driving shaft through the connecting member and the fixing member to achieve the stability of the open position and the closed position and to assist the driving shaft in the second half of opening and closing.
[0021] In combination with the first aspect, in a further solution, the connecting member is a C-shaped structure.
[0022] In combination with the first aspect, in a further solution, when the elastic component is located in the open position or the closed position, the drive shaft is located in the C-shaped arc of the connecting member.
[0023] By adopting the above technical solution, the C-shaped structure of the connecting piece can avoid interference with the driving shaft during movement, which is beneficial to the direction change of the torque of the driving shaft by the elastic component.
[0024] In a second aspect, the present application provides a seat comprising a power assist mechanism as described in the first aspect.
[0025] By adopting the above technical solution, the footrest mechanism can be made more stable in the open position and the closed position, and the footrest mechanism can rotate more smoothly and more efficiently in the second half of opening and closing.
[0026] In summary, the present application has at least one of the following beneficial technical effects:
[0027] 1. The power assist mechanism of the present application has a simple structure and can achieve bidirectional torque changes.
[0028] 2. The assist mechanism of the present application has more stable open and closed positions and can assist in both opening and closing.
[0029] 3. The seat of the present application is simple and convenient to operate, safer and more reliable, and has higher work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 is a schematic diagram of the structure of the footrest device;
[0031] Figure 2 It is a structural schematic diagram of the first embodiment of the assisting mechanism of the present application;
[0032] Figure 3 It is a structural schematic diagram of the state between the critical position and the open position of the first embodiment of the power assist mechanism of the present application;
[0033] Figure 4 It is a structural schematic diagram of the critical position of the first embodiment of the assisting mechanism of the present application;
[0034] Figure 5 This is a schematic structural diagram of the closed position of the first embodiment of the power assist mechanism of the present application;
[0035] Figure 6 It is a structural schematic diagram of the second embodiment of the assisting mechanism of the present application.
[0036] Reference numerals:
[0037] 1. Mounting seat; 11. Fixed column; 2. Driving shaft; 3. Gear mechanism; 4. Connecting rod mechanism; 5. Footrest; 6. Handle; 7. Elastic component; 71. Fixing piece; 72. Connecting piece; 73. Resetting piece. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0041] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.
[0042] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.
[0043] Embodiment 1
[0044] See also Figure 1, discloses a structure in which a power-assisting mechanism is applied to a leg support device, wherein the power-assisting mechanism comprises a mounting seat 1, a driving shaft 2 and an elastic component 7. The driving shaft 2 is rotatably connected to the mounting seat 1, one end of the elastic component 7 is fixedly connected to the driving shaft 2, and the other end is connected to the mounting seat 1. The driving shaft 2 is connected to a gear mechanism 3, and the gear mechanism 3 is connected to a connecting rod mechanism 4. A foot support 5 is hingedly connected to one end of the connecting rod mechanism 4 away from the mounting seat 1. The end of the driving shaft 2 is fixedly connected to a handle 6, and the driving shaft 2 is driven to move the connecting rod mechanism 4 through the gear mechanism 3 by rotating the handle 6, so that the foot support 5 moves between a retracted position close to the mounting seat 1 and an extended position away from the mounting seat 1. Another feasible scheme is that the driving shaft 2 is directly connected to the connecting rod mechanism 4, and the driving shaft 2 is driven to rotate by the handle 6 or the motor, while the connecting rod mechanism 4 is driven to move.
[0045] During the process of the elastic component 7 being driven by the drive shaft 2 to rotate, the elastic component 7 has a critical position relative to the drive shaft 2, and the elastic component 7 applies a torque opposite to the drive shaft 2 on both sides of the critical position. During the movement of the connecting rod mechanism 4, the footrest 5 is driven to move between a retracted position close to the mounting seat 1 and an extended position away from the mounting seat 1. The elastic component 7 has two stable positions, which are an open position and a closed position, respectively, and the critical position is located between the open position and the closed position. When the footrest 5 is in the extended position, the elastic component 7 is in the open position, and when the footrest 5 is in the retracted position, the elastic component 7 is in the closed position.
[0046] See also Figure 2 and Figure 3 , is a schematic diagram of the connection structure of the power-assist mechanism. The fixing member 71 is fixedly connected to the drive shaft 2, and the fixing member 71 is hinged to the connecting member 72. The end of the connecting member 72 away from the fixing member 71 is connected to the reset member 73, and the other end of the reset member 73 is connected to the fixed column 11 on the mounting seat 1. The reset member 73 in this embodiment is a tension spring, the fixed column 11 is fixedly connected to the mounting seat 1, and the reset member 73 is connected to the connecting member 72 and the mounting seat 1 respectively through hooks at both ends, and the connecting member 72 is a C-shaped structure. When the drive shaft 2 rotates from the closed position to the open position ( Figure 3 During the process of rotating the drive shaft 2 in the counterclockwise direction, when the critical position is exceeded, the reset member 73 pulls the connecting member 72 to cause the fixing member 71 to apply the driving shaft 2 in the counterclockwise direction ( Figure 3 direction) torque to assist the drive shaft 2 in extending the driving torque, making the operation of the entire mechanism smoother and more labor-saving.
[0047] See also Figure 3 , when the line connecting the hinge point of the fixing member 71 and the connecting member 72 and the axis of the driving shaft 2 and the pulling direction of the reset member 73 are in a straight line, and the driving shaft 2 is located between the hinge point of the fixing member 71 and the connecting member 72 and the reset member 73, this is the critical position of the elastic component 7. When the driving shaft 2 rotates negatively ( Figure 3When the footrest 5 moves from the retracted position to the extended position (counterclockwise) and the elastic component 7 exceeds the critical position, that is, when the elastic component 7 moves from the critical position to the open position, the elastic component 7 increases the negative torque of the drive shaft 2, making the extension movement more labor-saving and smoother. Figure 3 When the elastic component 7 exceeds the critical position (clockwise) and drives the footrest 5 to move from the extended position to the retracted position, the elastic component 7 increases the positive torque of the drive shaft 2, making the retracting movement more labor-saving and smoother. The elastic component 7 of this solution can achieve assistance in two directions through structural design, and the structure is simple and reliable.
[0048] When the drive shaft 2 rotates in the negative direction ( Figure 3 When the elastic component 7 does not reach the critical position, that is, when the elastic component 7 moves from the closed position to the critical position, the elastic component 7 increases the torque in the positive direction of the drive shaft 2, and a larger torque is required to make the footrest 5 leave the retracted position to maintain the stability of the retracted position. Figure 3 When the footrest 5 is driven to move from the extended position to the retracted position (clockwise) and the elastic component 7 has not reached the critical position, that is, when the elastic component 7 moves from the open position to the critical position, the elastic component 7 increases the torque in the negative direction of the drive shaft 2, and a larger torque is required to make the footrest 5 leave the extended position to maintain the reliability of the extended position.
[0049] See also Figure 4 , in the critical position of the elastic component 7 during the rotation of the drive shaft 2, at this time, the line connecting the hinge point of the fixing member 71 and the connecting member 72 and the axis of the drive shaft 2 and the pulling direction of the reset member 73 are in a straight line. When the drive shaft 2 rotates counterclockwise (in the direction of the drawing) and the elastic component 7 moves from the critical position to the open position, the fixing member 71 rotates counterclockwise (in the direction of the drawing), and the reset member 73 pulls the connecting member 72 and the fixing member 71 to increase the torque in the counterclockwise direction of the drive shaft 2. When the drive shaft 2 rotates clockwise (in the direction of the drawing) and the elastic component 7 moves from the critical position to the closed position, the fixing member 71 rotates clockwise (in the direction of the drawing), and the reset member 73 pulls the connecting member 72 and the fixing member 71 to increase the torque in the clockwise direction of the drive shaft 2.
[0050] See also Figure 5, the elastic component 7 is in the closed position, the drive shaft 2 and the fixing member 71 are located in the C-shaped arc of the connecting member 72, and the reset member 73 pulls the fixing member 71 through the connecting member 72 to apply a clockwise torque (in the direction of the drawing) to the drive shaft 2, making the state of the retracted position more stable. The C-shaped structural design of the connecting member 72 can have good functional characteristics in both the open position and the closed position of the elastic component 7, and effectively avoid the interference problem between the connecting member 72 and the drive shaft 2 in the closed position.
[0051] Embodiment 2
[0052] See also Figure 6 , which is different from the first embodiment in that the connection position direction of the connecting member 72 and the fixing member is different, and the outer arc of the connecting member 72 of this embodiment is set upward.
[0053] Embodiment 3
[0054] This embodiment provides a seat, specifically a chair or a sofa, having the power-assisting mechanism of the first or second embodiment, which can make the state of the extended position and the retracted position of the footrest 5 more stable, and the opening and retracting operations are more labor-saving.
[0055] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes, modifications, substitutions and variants, and these changes, modifications, substitutions and variants all fall within the scope of the utility model claimed for protection.
Claims
1. A power assist mechanism, comprising a mounting seat (1), characterized in that: Also includes: A driving shaft (2) is rotatably connected to the mounting seat (1) and is used to drive the footrest (5) to move; An elastic component (7), one end of which is fixedly connected to the driving shaft (2) and the other end of which is connected to the mounting seat (1); In the process of the drive shaft (2) driving the elastic component (7) to rotate, the elastic component (7) has a critical position relative to the drive shaft (2), and the elastic component (7) applies opposite torques to the drive shaft (2) on both sides of the critical position.
2. The power assist mechanism according to claim 1, characterized in that: The elastic component (7) has two stable positions, which are an open position and a closed position respectively, and the critical position is located between the open position and the closed position.
3. The power assist mechanism according to claim 2, characterized in that: When the drive shaft (2) rotates in the positive direction to drive the elastic component (7) to move from the open position to the critical position, the elastic component (7) applies a negative torque to the drive shaft (2).
4. The power assist mechanism according to claim 3, characterized in that: When the drive shaft (2) rotates in the positive direction to drive the elastic component (7) to move from the critical position to the closed position, the elastic component (7) applies a positive torque to the drive shaft (2).
5. The power assist mechanism according to claim 2, characterized in that: When the drive shaft (2) rotates in the negative direction to drive the elastic component (7) to move from the closed position to the critical position, the elastic component (7) applies a positive torque to the drive shaft (2).
6. The power assist mechanism according to claim 5, characterized in that: When the drive shaft (2) rotates in the negative direction to drive the elastic component (7) to move from the critical position to the open position, the elastic component (7) applies a negative torque to the drive shaft (2).
7. The power assist mechanism according to any one of claims 2 to 6, characterized in that: The elastic component (7) comprises a fixing member (71), a connecting member (72) and a reset member (73); the fixing member (71) is fixedly connected to the driving shaft (2); one end of the fixing member (71) away from the driving shaft (2) is hinged to the connecting member (72); one end of the reset member (73) is connected to the mounting seat (1) and the other end is connected to one end of the connecting member (72) away from the fixing member (71).
8. The power assist mechanism according to claim 7, characterized in that: The connecting piece (72) is a C-shaped structure.
9. The power assist mechanism according to claim 8, characterized in that: When the elastic component (7) is located in the open position or the closed position, the drive shaft (2) is located within the C-shaped arc of the connecting member (72).
10. A seat, characterized in that: It comprises a power assist mechanism as described in any one of claims 1 to 9.