Transmission device and seat

Abstract

The utility model discloses a transmission device and a seat, and the transmission device comprises a mounting seat and a foot support, and further comprises a driving shaft rotationally connected to the mounting seat; the gear mechanism comprises a driving wheel, a middle wheel and a driven wheel, the driving wheel, the middle wheel and the driven wheel are rotationally connected to the mounting base, the middle wheel is meshed with the driving wheel and the driven wheel, and the driving wheel is fixedly connected with the driving shaft; one end of the connecting rod mechanism is rotationally connected with the foot support, the other end of the connecting rod mechanism is connected with the driven wheel and the mounting seat, and the driven wheel drives the connecting rod mechanism to rotate so as to drive the foot support to move. The transmission device and the seat have the advantage of being more humanized in operability.

Description

Technical Field

[0001] The present application relates to the field of home furnishing technology, and in particular to a transmission device 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. Currently, the footrest of the sofa with functional adjustment can be extended to support the legs of the occupant in a lying position, and the footrest is retracted under the seat in a sitting position. Currently, the extension and retraction of the footrest are inefficient and inconvenient to operate. Utility Model Content

[0003] The present application provides a transmission device and a seat, which makes the control of the footrest simpler and more convenient.

[0004] In a first aspect, the present application provides a transmission device, including a mounting seat and a footrest, and further comprising:

[0005] A drive shaft, rotatably connected to the mounting seat;

[0006] A gear mechanism, comprising a driving wheel, an intermediate wheel and a driven wheel which are respectively rotatably connected to the mounting seat, the intermediate wheel is respectively meshed with the driving wheel and the driven wheel, and the driving wheel is fixedly connected to the driving shaft;

[0007] A connecting rod mechanism has one end rotatably connected to the foot rest and the other end connected to the driven wheel and the mounting seat. The driven wheel drives the connecting rod mechanism to rotate, thereby driving the foot rest to move between an extended position and a retracted position.

[0008] By adopting the above technical solution, through the coordinated connection of the gear mechanism and the connecting rod mechanism, the driven wheel drives the connecting rod mechanism to rotate, thereby driving the footrest to move between the extended position and the retracted position, the structure is simpler and the transmission efficiency is higher. The transmission device of the present application can be driven by a motor or manually. The manual drive can directly drive the drive shaft. Through the coordination of the gear mechanism, the direction of the drive shaft and the driven wheel can be converted, making the operation simpler and more humane.

[0009] In combination with the first aspect, in a further solution, a transmission ratio of the driving wheel and the driven wheel is 1:1.1~1:1.2.

[0010] In combination with the first aspect, in a further solution, the transmission ratio of the driving wheel and the driven wheel is 1:1.15.

[0011] By adopting the above technical solution, the relationship between the driving angle of the driving shaft and the movement of the footrest is more reasonable, and the operation is simple and efficient.

[0012] In combination with the first aspect, in a further solution, a line connecting the rotation centers of the driving wheel, the intermediate wheel and the driven wheel is a triangle.

[0013] By adopting the above technical solution, the space and position are arranged reasonably and the structure is more compact.

[0014] In combination with the first aspect, in a further solution, the driving shaft is connected to a handle, and the movement direction of the handle is opposite to the movement direction of the foot rest.

[0015] By adopting the above technical solution, it is more convenient to operate manually. When changing the lying position, the human body leans back, the handle rotates backward along with the human body, and the footrest moves away from the handle. When changing from lying position to sitting position, the human body sits up, the handle rotates with the human body, and the footrest moves toward the handle. The movement of the handle is in the same direction as the posture change of the human body, and the operation is more reasonable and convenient.

[0016] In combination with the first aspect, a further solution is that the footrest has an extended position away from the mounting seat and a retracted position close to the mounting seat, and the footrest has a support surface. During the movement from the extended position to the retracted position, the support surface of the footrest rotates at an angle of 130°~160°.

[0017] By adopting the above technical solution, the footrest occupies little space in the retracted position, and in the deployed position, the supporting surface of the footrest can support the legs upward, with a large telescopic ratio.

[0018] In combination with the first aspect, in a further solution, during the movement from the extended position to the retracted position, the driven wheel rotates at an angle of 150° to 170°.

[0019] By adopting the above technical solution, the probability of interference between the driven wheel and adjacent components is low, and the footrest can be driven to extend and retract smoothly, with a large telescopic ratio and smoother movement.

[0020] In combination with the first aspect, in a further solution, the ratio of the maximum distance between the footrest and the rotation center of the driven wheel in the extended position and the maximum distance between the footrest and the rotation center of the driven wheel in the retracted position is 2.5~3.5.

[0021] By adopting the above technical solution, the extension and contraction functions of the footrest can be realized, and the occupied space can be reduced in the retracted position. A better balance of efficiency and function can be achieved when the extension ratio is within the range of 2.5 to 3.5.

[0022] In combination with the first aspect, a further solution is that the connecting rod mechanism includes a first connecting rod assembly and a second connecting rod assembly, one end of the first connecting rod assembly is fixedly connected to the driven wheel, and the other end is hinged to the foot rest; one end of the second connecting rod assembly is hinged to the mounting seat, and the other end is hinged to the foot rest, and the first connecting rod assembly and the second connecting rod assembly are hinged.

[0023] By adopting the above technical solution, the structure is simpler and more reliable through the connection transmission of the connecting rod mechanism, which is not only conducive to the standardization of accessories, but also makes the design more flexible and can meet more usage requirements.

[0024] In a second aspect, the present application provides a seat comprising the transmission device as described in the first aspect.

[0025] By adopting the above technical solution, the transmission device has a large telescopic ratio, a simple structure, and a low cost, and can also reduce the occupied space of the entire seat.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The transmission device of the present application, through the cooperation of the gear mechanism and the connecting rod mechanism, has a simple product structure, a large telescopic ratio, and occupies a small space.

[0028] 2. The transmission device of the present application is easier to operate and more ergonomic.

[0029] 3. The seat of the present application is simple and convenient to operate, and can also reduce the space occupied during the entire seat operation process, with higher control efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the first embodiment of the transmission device of the present application;

[0031] Figure 2 It is a structural schematic diagram of the first embodiment of the transmission device of the present application;

[0032] Figure 3 It is a structural schematic diagram of the first embodiment of the transmission device of the present application in the retracted position;

[0033] Figure 4 It is a structural schematic diagram of the first embodiment of the transmission device of the present application in the extended position;

[0034] Figure 5 It is a structural schematic diagram of the gear mechanism of the first embodiment of the transmission device of the present application;

[0035] Figure 6 It is a structural schematic diagram of the retracted position of the second embodiment of the transmission device of the present application;

[0036] Figure 7 It is a structural schematic diagram of the stretching process of the second embodiment of the transmission device of the present application;

[0037] Figure 8 It is a schematic structural diagram of the second embodiment of the transmission device of the present application in the extended position;

[0038] Reference numerals:

[0039] 1. Mounting seat; 2. Driving shaft; 3. Gear mechanism; 31. Active wheel; 32. Intermediate wheel; 33. Driven wheel; 4. Connecting rod mechanism; 41. Active rod; 42. First connecting rod; 43. Second connecting rod; 431. Limit rod; 44. Fifth connecting rod; 45. Third connecting rod; 46. Fourth connecting rod; 5. Footrest; 51. Support surface; 6. Handle; 7. Power-assisting mechanism; a. Maximum distance between the footrest and the rotation center of the driven wheel; b. Rotation angle of the supporting surface of the footrest; c. Rotation angle of the driven wheel. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Embodiment 1

[0046] See also Figure 1 , discloses a structure of a transmission device in an extended state in an embodiment, the transmission device includes a mounting seat 1, a driving shaft 2 is rotatably connected to the mounting seat 1, the driving shaft 2 is connected to a gear mechanism 3, the gear mechanism 3 is connected to a connecting rod mechanism 4, and a footrest 5 is hingedly connected to one end of the connecting rod mechanism 4 away from the mounting seat 1. The driving shaft 2 drives the gear mechanism 3 to drive the connecting rod mechanism 4 to move, so that the footrest 5 moves between a retracted position close to the mounting seat 1 and an extended position away from the mounting seat 1. A power-assisting mechanism 7 is also connected between the driving shaft 2 and the mounting seat 1, and the power-assisting mechanism 7 increases the torque of the driving shaft 2 rotating in the extension direction within the second half of the stroke when the driving shaft 2 drives the footrest 5 to move to the extended position; the power-assisting mechanism 7 increases the torque of the driving shaft 2 rotating in the retracting direction within the second half of the stroke when the driving shaft 2 drives the footrest 5 to move to the retracted position.

[0047] In this embodiment, two sets of transmission devices are connected through the drive shaft 2 to form a linked whole, and jointly realize related functions, which can make the functions more reliable. Two mounting seats 1 are arranged on both sides of the axial direction of the drive shaft 2 and are pivotally connected to the drive shaft 2. The mounting seat 1 is connected with a gear mechanism 3 and a connecting rod mechanism 4, and the connecting rod mechanism 4 is hinged to the footrest 5.

[0048] Because the transmission devices on the left and right sides have the same structure, the transmission device on one side is used as an example to explain the structure.

[0049] See also Figure 2 The gear mechanism 3 includes a driving wheel 31, an intermediate wheel 32 and a driven wheel 33 which are respectively rotatably connected to the mounting seat 1. The intermediate wheel 32 is meshed with the driving wheel 31 and the driven wheel 33 respectively. The driving wheel 31 is fixedly connected to the driving shaft 2. The rotation center connecting line of the driving wheel 31, the intermediate wheel 32 and the driven wheel 33 is a triangle. The driving shaft 2 rotates to drive the driving wheel 31 to rotate, the driving wheel 31 drives the intermediate wheel 32 to rotate, and the intermediate wheel 32 drives the driven wheel 33 to rotate. The gear mechanism 3 has a higher transmission efficiency. The driving wheel 31 and the driven wheel 33 have the same rotation direction. By adjusting the transmission ratio and relative position of the driving wheel 31, the intermediate wheel 32 and the driven wheel 33, the opening angle of the handle 6 can be changed, so as to realize different opening angles of the handle 6 according to different design and use requirements, and has more flexible product design adaptability. The transmission ratio of the driving wheel 31 and the driven wheel 33 is 1:1.1~1:1.2, and the optimal is 1:1.15.

[0050] See also Figure 3, is a structure in which the footrest 5 of the transmission device is in the extended position. In this state, the support surface 51 of the footrest 5 faces upward. One end of the connecting rod mechanism 4 is rotatably connected to the footrest 5, and the other end is connected to the driven wheel 33 and the mounting seat 1. The driven wheel 33 drives the connecting rod mechanism 4 to rotate, thereby driving the footrest 5 to move between the extended position and the retracted position.

[0051] The connecting rod mechanism 4 includes a first connecting rod assembly and a second connecting rod assembly. The first connecting rod assembly includes an active rod 41, a first connecting rod 42, a third connecting rod 45 and a fourth connecting rod 46. One end of the active rod 41 is integrally fixedly connected to the driven wheel 33, and the other end is hinged to the first connecting rod 42. One end of the third connecting rod 45 is hinged to one end of the first connecting rod 42 away from the active rod 41, and the other end is hinged to the fourth connecting rod 46. One end of the fourth connecting rod 46 away from the third connecting rod 45 is hinged to the footrest 5. The second connecting rod assembly includes a second connecting rod 43 and a fifth connecting rod 44. One end of the second connecting rod 43 is hinged to the mounting seat 1, and the middle position of the first connecting rod 42 and the second connecting rod 43 is hinged to each other. One end of the fifth connecting rod 44 is hinged to one end of the second connecting rod 43 away from the mounting seat 1, and the other end is hinged to the footrest 5. The fifth connecting rod 44 and the third connecting rod 45 are hinged to each other at the middle position.

[0052] The first link 42, the third link 45, the fifth link 44 and the second link 43 form a four-bar linkage, the active rod 41, the first link 42, the second link 43 and the mounting seat 1 are connected to form a four-bar linkage, the third link 45, the fourth link 46, the foot rest 5 and the fifth link 44 are connected to form a four-bar linkage.

[0053] The driven wheel 33 drives the active rod 41 to rotate, and the active rod 41 drives the first connecting rod 42, the third connecting rod 45 and the fourth connecting rod 46 to move. Because the first connecting rod 42 and the second connecting rod 43 are hinged, and the fifth connecting rod 44 and the third connecting rod 45 are hinged, the first connecting rod assembly drives the second connecting rod 43 and the fifth connecting rod 44 of the second connecting rod assembly to move synchronously during the movement. The driving shaft 2 can also be directly fixedly connected to the active rod 41, and the rotation of the driving shaft 2 drives the active rod 41 to rotate, thereby driving the entire connecting rod mechanism to move.

[0054] See also Figure 4 When the transmission device is about to enter the retracted position, the active rod 41 rotates clockwise (in the direction shown in the figure), the hinge point between the active rod 41 and the first connecting rod 42 moves close to the driving shaft 2, and the supporting surface 51 of the footrest 5 tilts downward.

[0055] See also Figure 5 , the transmission device is in the extended state, the footrest 5 is in the extended position, and the support surface 51 faces upward.

[0056] See also Figure 4 and Figure 5During the movement of the connecting rod mechanism 4, the footrest 5 is driven to move closer to or away from the mounting seat 1 and rotate synchronously, so that the support surface 51 of the footrest 5 can support the legs upward in the extended position, and the support surface 51 is rotated and retracted in the retracted position to tilt downward. During the movement from the extended position to the retracted position, the rotation angle c of the driven wheel 33 is 150°~170°, and the rotation angle b of the support surface 51 of the footrest 5 is 130°~160°. The ratio of the maximum distance between the footrest 5 and the rotation center of the driven wheel 33 in the extended position and the maximum distance a between the footrest and the rotation center of the driven wheel in the retracted position is 2.5~3.5.

[0057] In this embodiment, the connecting rod mechanism 4 and the footrest 5 can be driven to move by the motor driving the driving shaft 2 to rotate, or the connecting rod mechanism 4 and the footrest 5 can be driven to move by external force driving the driving shaft 2 to rotate.

[0058] Embodiment 2

[0059] See also Figure 6-Figure 8 The difference from the first embodiment is that the transmission device of this embodiment also includes a handle 6, which is fixedly connected to the driving shaft 2. The movement direction of the handle 6 is opposite to the movement direction of the foot rest 5. The connecting rod mechanism 4 and the foot rest 5 are driven to move by rotating the handle 6.

[0060] See also Figure 6 , which is the retracted state of the transmission device, the connecting rod mechanism 4 is retracted and folded, the footrest 5 is located in the retracted position close to the drive shaft 2 and the mounting seat 1, the support surface 51 is inclined downward, and the handle 6 is away from the end of the drive shaft 2 and faces forward.

[0061] See also Figure 7 , the transmission device gradually opens, and the handle 6 moves from Figure 6 The position in the middle is rotated counterclockwise (in the direction shown in the figure), the end of the handle 6 away from the driving shaft 2 is upward, the footrest 5 moves and rotates in the direction away from the driving shaft 2, and the supporting surface 51 faces forward.

[0062] See also Figure 8 , the transmission device is in the extended state, the footrest 5 is in the extended position, and the handle 6 is Figure 7 The position continues to rotate counterclockwise (in the direction shown in the figure), the connecting rod mechanism 4 is fully extended, the handle 6 is tilted backward away from the end of the drive shaft 2, the footrest 5 is away from the drive shaft 2 and the support surface 51 is rotated upward.

[0063] Embodiment 3

[0064] Referring to the above figures, this embodiment provides a seat, specifically a multifunctional seat or sofa, having the transmission device in the first embodiment. The mounting seat 1 of the transmission device is fixed under the seat or sofa. In the sitting state, the footrest 5 is in the retracted position under the seat and is self-locked to maintain the stability of the position of the footrest 5. In the lying state, the connecting rod mechanism 4 rotates and unfolds, the footrest 5 is away from the mounting seat 1, and the support surface 51 is upward for supporting the legs.

[0065] The backrest of the seat or sofa is fixedly connected to the drive shaft 2. In the sitting state, the user sits on the seat or sofa and leans back to drive the backrest to rotate. The backrest drives the drive shaft 2 to rotate. The drive shaft 2 drives the footrest 5 to move through the connecting rod mechanism 4. The footrest 5 rotates and extends from the bottom of the seat to the extended position. In the lying state, the user stands up and drives the backrest to rotate forward. The backrest drives the drive shaft 2 to rotate. The drive shaft 2 drives the footrest 5 to move through the connecting rod mechanism 4. The footrest 5 is retracted to the bottom of the seat and is in the retracted position. The footrest 5 is driven to move synchronously by the change of the human body posture. The direction of the change of the human posture is the same as the direction of the change of the use state of the footrest 5, which is more convenient and smooth when operating.

[0066] The movement of the footrest 5 can also be achieved by driving the driving shaft 2 to rotate through a driving motor.

[0067] Embodiment 4

[0068] Referring to the above figures, this embodiment provides a seat, specifically a multifunctional seat or sofa, having the transmission device in the second embodiment. The mounting seat 1 of the transmission device is fixed under the seat or sofa. In the sitting state, the footrest 5 is in the retracted position under the seat and is self-locked to maintain the stability of the position of the footrest 5. In the lying state, the connecting rod mechanism 4 rotates and unfolds, the footrest 5 is away from the mounting seat 1, and the support surface 51 is upward for supporting the legs.

[0069] In the sitting state, the user sits on a chair or sofa, turns the handle 6 backwards by hand while leaning back, and the footrest 5 rotates out from under the seat and is in the extended position. In the lying state, the user stands up and drives the handle 6 to rotate forward, and the footrest 5 is retracted to under the seat and is in the retracted position. The rotation direction of the handle 6 is the same as the direction of the user's use state change, which is more convenient and smooth when operating.

[0070] 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 transmission device, comprising a mounting seat (1) and a footrest (5), characterized in that: Also includes: A driving shaft (2) rotatably connected to the mounting seat (1); A gear mechanism (3), comprising a driving wheel (31), an intermediate wheel (32) and a driven wheel (33) which are respectively rotatably connected to the mounting seat (1), the intermediate wheel (32) being meshed with the driving wheel (31) and the driven wheel (33) respectively, and the driving wheel (31) being fixedly connected to the driving shaft (2); A connecting rod mechanism (4) has one end rotatably connected to the footrest (5) and the other end connected to the driven wheel (33) and the mounting seat (1); the driven wheel (33) drives the connecting rod mechanism (4) to rotate, thereby driving the footrest (5) to move between an extended position and a retracted position.

2. The transmission device according to claim 1, characterized in that: The transmission ratio between the driving wheel (31) and the driven wheel (33) is 1:1.1-1:1.

2.

3. The transmission device according to claim 2, characterized in that: The transmission ratio between the driving wheel (31) and the driven wheel (33) is 1:1.

15.

4. The transmission device according to claim 2, characterized in that: The connecting line of the rotation centers of the driving wheel (31), the intermediate wheel (32) and the driven wheel (33) is a triangle.

5. The transmission device according to claim 1, characterized in that: The driving shaft (2) is connected to a handle (6), and the movement direction of the handle (6) is opposite to the movement direction of the footrest (5).

6. The transmission device according to claim 5, characterized in that: The footrest (5) has an extended position away from the mounting seat (1) and a retracted position close to the mounting seat (1), and the footrest (5) has a support surface (51). During the movement from the extended position to the retracted position, the support surface (51) of the footrest (5) rotates at an angle of 130° to 160°.

7. The transmission device according to claim 6, characterized in that: During the movement from the extended position to the retracted position, the driven wheel (33) rotates at an angle of 150° to 170°.

8. The transmission device according to claim 1, characterized in that: The ratio of the maximum distance between the footrest (5) and the rotation center of the driven wheel (33) in the extended position to the maximum distance between the footrest (5) and the rotation center of the driven wheel (33) in the retracted position is 2.5-3.

5.

9. The transmission device according to any one of claims 1 to 8, characterized in that: The connecting rod mechanism (4) comprises a first connecting rod assembly and a second connecting rod assembly, wherein one end of the first connecting rod assembly is fixedly connected to the driven wheel (33) and the other end is hinged to the footrest (5); one end of the second connecting rod assembly is hinged to the mounting seat (1) and the other end is hinged to the footrest (5), and the first connecting rod assembly and the second connecting rod assembly are hinged.

10. A seat, characterized in that: Comprising a transmission device as claimed in any one of claims 1 to 9.

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