Linkage mechanism

Abstract

The utility model provides a linkage mechanism which comprises a base, a first driven part, a driving part and a linkage assembly, the first driven part is rotationally connected to the base, the driving part is rotationally arranged on the first driven part, and the linkage assembly is arranged between the driving part and the base; the linkage assembly comprises a reference gear and a linkage gear which are meshed with each other, the driving part rotates relative to the base through meshing rotation of the reference gear and the linkage gear, and the driving part rolls along the outer edge of the reference gear while rotating, so that the first driven part is driven to rotate relative to the base, and linkage between the first driven part and the base is achieved; compared with a four-connecting-rod mechanism, the number of parts of the linkage mechanism is smaller, assembly can be simplified, movement interference is avoided, and generated abrasion is smaller. A four-bar mechanism must be provided with three moving rod pieces and a relatively static rack rod piece, so that the structure is limited, and the linkage mechanism can just realize linkage of rotating parts under the condition that the use of the four-bar mechanism is limited.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture field, especially a linkage mechanism. BACKGROUND

[0002] With the improvement of people's living standards, the requirement of furniture on functionality is also higher and higher, which also leads to modern furniture needing more movable ability to realize various functions; for manufacturers, more movable mechanisms, linkage mechanisms need to be developed to meet the movability of different components.

[0003] In furniture, the number of rotating components is not small, in the prior art, the rotation of a single rotating component usually only needs to be provided with a rotating shaft to realize, which is relatively convenient, but the linkage of two rotating components needs engineers and designers to further research; generally, manufacturers will use a connecting rod mechanism as a linkage mechanism of two rotating components, that is, linkage is realized through a connecting rod, and the common one is a four-bar linkage mechanism, but the existing connecting rod mechanism has some problems, such as that the assembly becomes complex after the number of components is increased, the connecting rod mechanism is prone to motion interference and motion wear. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a linkage mechanism, including base, first follower, driving piece and linkage assembly, first follower is rotatably connected on base, driving piece is rotatably arranged on first follower, and linkage assembly is arranged between driving piece and base; the linkage assembly includes mutually meshing reference gear and linkage gear, the driving piece is rotatably connected to the base through the meshing of the reference gear and the linkage gear, and the driving piece is rotatably connected to the base through the meshing of the reference gear and the linkage gear, and the driving piece is rotatably connected to the base through the meshing of the reference gear and the linkage gear, and the driving piece is rotatably connected to the base through the meshing of the reference gear and the linkage gear.

[0005] The technical scheme of the utility model is realized as follows:

[0006] A linkage mechanism, including base, first follower, driving piece and linkage assembly, first follower is rotatably connected on base, driving piece is rotatably arranged on first follower, and linkage assembly is arranged between driving piece and base; the linkage assembly includes mutually meshing reference gear and linkage gear, the base and the reference gear are fixedly connected, the driving piece and the linkage gear are fixedly connected, the reference gear and the linkage gear are arranged in the first follower, and the first follower is configured to rotate the first follower on the base when the driving piece rotates.

[0007] In the linkage mechanism, the driving member rotates relative to the base through the meshing of the reference gear and the linkage gear, and the driving member rotates while rolling along the outer edge of the reference gear, thereby driving the first driven member to rotate relative to the base to realize linkage between the two; compared with the four-bar linkage mechanism, the linkage mechanism has fewer components, can simplify assembly, and will not cause motion interference and wear; moreover, since the four-bar linkage mechanism must have three moving rods and a relatively stationary frame rod, it is limited by its structural requirements, and the linkage mechanism can realize linkage of rotating components in the limited use of the four-bar linkage mechanism.

[0008] Preferably, a first rotating shaft is arranged in the center of the reference gear, and the first driven member is rotatably connected to the base through the first rotating shaft; a second rotating shaft is arranged in the center of the linkage gear, and the first driven member is rotatably connected to the driving member through the second rotating shaft; when the driving member rotates, the linkage gear rotates around the second rotating shaft and rolls along the outer edge of the reference gear to drive the first driven member to rotate on the base. The first rotating shaft is the rotation center of the first driven member, and the second rotating shaft is arranged eccentrically relative to the first rotating shaft; when the driving member rotates around the second rotating shaft, the driving member also revolves relative to the first rotating shaft under the meshing action of the gears; at this time, since the second rotating shaft is arranged eccentrically relative to the first rotating shaft, the driving member also drives the first driven member to rotate around the first rotating shaft, thereby realizing linkage between the two.

[0009] Preferably, first and second accommodating grooves are formed in the first driven member and communicate with each other, the reference gear is arranged in the first accommodating groove, and the linkage gear is arranged in the second accommodating groove. The accommodating grooves are used to accommodate the gears, thereby reducing the overall structural thickness and making the structure more compact.

[0010] Preferably, the linkage mechanism further comprises a second driven member rotatably connected to the base and linked to the first driven member; when the driving member rotates, the first driven member and the second driven member both rotate on the base. The first driven member can further link the second driven member, thereby enriching the functionality of the furniture.

[0011] Preferably, the first driven member has at least two eccentric portions, the driving member is arranged on one of the eccentric portions, and the second driven member is linked to the other eccentric portion. The rotation of the first driven member is driven by the eccentric portion connected to the driving member, and the other eccentric portion can drive other components to move, thereby realizing multiple linkages.

[0012] Preferably, a connecting rod is arranged between the second driven member and the first driven member, one end of the connecting rod is rotatably connected to the first driven member, and the other end of the connecting rod is rotatably connected to the second driven member. The second driven member, the connecting rod, the first driven member, and the base form a four-bar linkage mechanism to drive the second driven member to move.

[0013] As preferred, the second follower is provided with an avoiding slot at the end close to the first follower, and the connecting rod is located in the avoiding slot. The avoiding slot makes the second follower and the connecting rod not interfere with each other, and ensures smooth movement during state switching.

[0014] As preferred, the reference gear is integrally formed with the base, and the linkage gear is integrally formed with the driving member. In this way, the number of parts is reduced.

[0015] The design starting point, concept and beneficial effects of the utility model with the above technical scheme are:

[0016] In the linkage mechanism, the driving member rotates relative to the base through the meshing of the reference gear and the linkage gear, and the driving member also rolls along the outer edge of the reference gear while rotating, thereby driving the first follower to rotate relative to the base to realize linkage between the two; compared with the four-bar linkage mechanism, the linkage mechanism has fewer parts, can simplify assembly, and will not interfere with movement, and has less wear; moreover, since the four-bar linkage mechanism must have three moving rods and a relatively stationary frame rod, it is limited by its structural requirements, and the linkage mechanism can realize linkage of rotating parts under the limited use of the four-bar linkage mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 6 is a perspective view of the footrest device in the folded state in the embodiment of the utility model;

[0018] Figure 2 Fig. 7 is a perspective view of the footrest device in the unfolded state in the embodiment of the utility model;

[0019] Figure 3 Fig. 8 is a side view of the footrest device in the folded state in the embodiment of the utility model;

[0020] Figure 4 Fig. 9 is a side view of the footrest device in the unfolded state in the embodiment of the utility model;

[0021] Figure 5 Fig. 10 is a sectional view of the footrest device in the unfolded state in the embodiment of the utility model;

[0022] Figure 6 Fig. 11 is a state diagram of the internal components of the base in the folded state in the embodiment of the utility model;

[0023] Figure 7 Fig. 12 is a state diagram of the internal components of the base in the unfolded state in the embodiment of the utility model;

[0024] Figure 8 Fig. 13 is a schematic view of the positions of the first gear and the linkage gear in the folded state in the embodiment of the utility model;

[0025] Figure 9 It is the schematic view of the first linkage gear position of the utility model in the embodiment of unfolding state;

[0026] Figure 10 It is the schematic view of the first driven member of the utility model in the embodiment Figure 1 ;

[0027] Figure 11 It is the schematic view of the first driven member of the utility model in the embodiment Figure 2 .

[0028] The reference signs are: base 1, driving member 2, first bearing part 21, first connecting part 22, second driven member 3, second bearing part 31, second connecting part 32, first driven member 4, first support surface 5, second support surface 6, connecting rod member 7, avoiding groove 8, reference gear 9, linkage gear 10, first accommodating groove 11, second accommodating groove 12, first rotating shaft 13, second rotating shaft 14, sliding rod 15, sliding seat 16, spring 17, sliding groove 18. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the protection scope of the utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the utility model, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] The specific embodiments of the utility model are as follows:

[0033] As Figures 1-5As shown, the utility model provides a kind of linkage mechanism, including pedestal 1, first follower 4, driving member 2 and linkage assembly, first follower 4 is rotatably connected on pedestal 1, driving member 2 is rotatably arranged on first follower 4, linkage assembly is arranged between driving member 2 and pedestal 1;Linkage assembly includes reference gear 9 and linkage gear 10 meshing with each other, pedestal 1 is fixedly connected with reference gear 9, driving member 2 is fixedly connected with linkage gear 10, reference gear 9 and linkage gear 10 are all arranged in first follower 4, first follower 4 is configured when driving member 2 rotates, linkage gear 10 is meshed and rotated on reference gear 9 and drives first follower 4 to rotate on pedestal 1.

[0034] In the linkage mechanism, driving member 2 is rotated relative to pedestal 1 by the meshing rotation of reference gear 9 and linkage gear 10, and driving member 2 also rolls along the outer edge of reference gear 9 while rotating itself, thereby driving first follower 4 to rotate relative to pedestal 1 to realize linkage between the two; Compared with four-bar linkage mechanism, the linkage mechanism has fewer components, can simplify assembly, and also does not have motion interference and less wear; Moreover, since four-bar linkage mechanism must have three moving rods and a relatively stationary frame rod, it is limited by its structural requirements, and the linkage mechanism can realize linkage of rotating components in the limited use of four-bar linkage mechanism.

[0035] Specifically, as shown in Figures 1-4 , 7, 9, the linkage mechanism is applied to a footrest device, further comprising a second follower 3, the second follower 3 is rotatably connected with the pedestal 1, and the second follower 3 is linked with the first follower 4;When driving member 2 rotates, first follower 4 and second follower 3 are both rotated on pedestal 1.

[0036] The driving member 2 comprises a first supporting part 21 for supporting the leg and foot of a human body and a first connecting part 22 for connecting the first driven member 4, the first supporting part 21 and the first connecting part 22 are fixedly connected with each other, the second driven member 3 comprises a second supporting part 31 for supporting the leg and foot of a human body and a second connecting part 32 for connecting the base 1, the second supporting part 31 and the second connecting part 32 are fixedly connected with each other; the first supporting part 21 is provided with a first supporting surface 5, and the second supporting part 31 is provided with a second supporting surface 6; the driving member 2 and the second driven member 3 are close to each other in the folded state, and the first supporting surface 5 and the second supporting surface 6 are oppositely arranged in the folded state; in the unfolded state, the driving member 2 and the second driven member 3 are arranged side by side, and the first supporting surface 5 and the second supporting surface 6 are upwardly arranged, and the first supporting surface 5 and the second supporting surface 6 jointly form a foot supporting surface; when the folded state is switched to the unfolded state, the rotation angle of the driving member 2 is greater than the rotation angle of the second driven member 3; further, in the folded state, the first supporting part 21 is located beside the second supporting part 31, and the first connecting part 22 is also located beside the second connecting part 32, and the first supporting surface 5 and the second supporting surface 6 are oppositely arranged; in the unfolded state, the first supporting part 21 is located beside the second supporting part 31, and the second connecting part 32 is located below the first connecting part 22, and the first supporting surface 5 and the second supporting surface 6 are both upwardly arranged.

[0037] The second connecting part 32 has an arc, and is downwardly bent in the unfolded state; the relative positions of the driving member 2 and the second driven member 3 in the folded state and the unfolded state are realized through the above specific structure; in the folded state, the driving member 2 and the second driven member 3 are parallelly arranged, and in the state switching process, the rotation angle of the driving member 2 is 180° greater than the rotation angle of the second driven member 3, so that the foot supporting surface is formed after the turnover linkage; wherein the rotation angle of the driving member 2 is the rotation angle of the linkage gear 10, the rotation angle of the linkage gear 10 around the reference gear 9 is the rotation angle of the first driven member 4, and the rotation angle of the first driven member 4 and the rotation angle of the connecting rod 7 together determine the rotation angle of the second driven member 3.

[0038] As Figures 5-7As shown, a connecting rod 7 is arranged between the second follower 3 and the first follower 4, one end of the connecting rod 7 is rotatably connected with the first follower 4, the other end of the connecting rod 7 is rotatably connected with the second connecting portion 32 of the second follower 3, the second follower 3, the connecting rod 7, the first follower 4 and the base 1 form a four-bar linkage mechanism to drive the second follower 3 to move; the second connecting portion 32 of the second follower 3 is provided with an avoiding slot 8 at the end close to the first follower 4, the connecting rod 7 is located in the avoiding slot 8, in the folded state, the connecting rod 7 is located outside the avoiding slot 8, and the part rotatably connected with the second connecting portion 32 is also located in the avoiding slot 8; in the unfolded state, the connecting rod 7 is located in the avoiding slot 8; the existence of the avoiding slot 8 ensures that the second follower 3 and the connecting rod 7 will not interfere with each other, and ensures smooth movement during state switching.

[0039] Further, as shown, Figures 8-11 The base 1 is fixedly provided with a reference gear 9, the driving member 2 is fixedly provided with a linkage gear 10, the reference gear 9 is engaged with the linkage gear 10, the first follower 4 is provided with a first accommodating slot 11 and a second accommodating slot 12 which are in communication with each other, the reference gear 9 is located in the first accommodating slot 11, and the linkage gear 10 is located in the second accommodating slot 12; the reference gear 9 is integrally formed with the base 1, and the linkage gear 10 is integrally formed with the first connecting portion 22 of the driving member 2 and located at the end of the first connecting portion 22; the base 1 at the center of the reference gear 9 is provided with a first rotating shaft 13, and the first follower 4 is rotatably connected with the base 1 through the first rotating shaft 13; the driving member 2 at the center of the linkage gear 10 is provided with a second rotating shaft 14, and the first follower 4 is rotatably connected with the driving member 2 through the second rotating shaft 14; the first rotating shaft 13 is the rotation center of the first follower 4, and the second rotating shaft 14 is arranged eccentrically relative to the first rotating shaft 13; when the driving member 2 rotates around the second rotating shaft 14, the driving member 2 also revolves relative to the first rotating shaft 13 under the gear engagement, and at this time, the driving member 2 also drives the first follower 4 to rotate around the first rotating shaft 13 due to the eccentricity of the second rotating shaft 14 relative to the first rotating shaft 13, so as to realize the linkage of the two.

[0040] In the folded state, the driving member 2 and the second follower 3 are folded below the base 1, the rotation point of the driving member 2 is below the base 1, and the rotation point of the second follower 3 is above the base 1 and located at the front of the base 1; in the unfolded state, the rotation point of the driving member 2 is rotated above the base 1 and located beside the rotation point of the second follower 3, and the driving member 2 faces the rear and is above the base 1; in the folded state, the first and second followers 3 are all below the base 1, and in the unfolded state for a person to put his feet on, if the base 1 is still above, it will be conspicuous and troublesome, so the driving member 2 needs to be above the base 1; after the rotation point of the driving member 2 is rotated from below to above, the whole driving member 2 can be above the base 1, and this point is mainly realized by the above gear engagement structure.

[0041] Furthermore, such as Figures 5-7 As shown, an elastic support assembly is provided between the first driven member 4 and the base 1. The elastic support assembly is configured to always provide a forward elastic force to the first driven member 4 and keep the flip-up foot device in its current state. Since the driving member 2 and the second driven member 3 are retracted below the base 1 in the folded state, the point of action of the elastic support assembly on the first driven member 4 is located above the rotation point of the first driven member 4. In the unfolded state, the point of action of the elastic support assembly on the first driven member 4 is located below the rotation point of the first driven member 4. From the folded state... When switched to the unfolded state, the point of action of the elastic support component rotates from the top to the bottom; in the retracted state, the point of action of the elastic support component is on the upper part of the first follower 4 and provides a spring force to rotate the lower part of the first follower 4 backward, so that the driving member 2 and the second follower 3 can be retracted under the base 1; in the unfolded state, the point of action of the elastic support component is on the lower part of the first follower 4 and provides a spring force to rotate the upper part of the first follower 4 backward, thereby maintaining the first and second followers 3 in an unfolded posture, one in front and one behind, to support the human legs and feet.

[0042] Specifically, the elastic support assembly includes a sliding rod 15, a sliding seat 16, and a spring 17 disposed between the sliding rod 15 and the sliding seat 16. The sliding seat 16 is rotatably mounted on the base 1. The sliding rod 15 faces approximately forward and is rotatably mounted on the first driven member 4. The rear end of the sliding rod 15 is inserted into the sliding seat 16 and slides in cooperation with the sliding seat 16. The rear end of the sliding rod 15 is also provided with a groove 18. The pivot of the sliding seat 16 and the base 1 is disposed in the groove 18 as a sliding limit. The spring 17 is sleeved on the sliding rod 15, and the two ends of the spring 17 abut against the front end of the sliding rod 15 and the sliding seat 16, respectively, to provide forward elastic force to the sliding rod 15 and the first driven member 4. When the state changes, the point of action of the elastic support assembly on the first driven member 4 will change. Therefore, the elastic support assembly of this solution has sliding and rotating capabilities to adapt to the movement of the first driven member 4, while the spring 17 always provides forward elastic force to the first driven member 4.

[0043] The base 1 serves as the main support for the flip-up footrest device. The base 1 is generally composed of two sets of telescopic tubes arranged at intervals on the left and right. The driving member 2, the second driven member 3, the first driven member 4, and the connecting rod 7 are all arranged between the two telescopic tubes. The flip-up footrest device is mounted on the seat or chassis of the seat through the base 1. The base 1 and its front part are provided with a mounting groove. The sliding seat 16 is arranged in the mounting groove, and the mounting groove can also avoid the sliding and rotation of the sliding rod 15.

[0044] The first follower 4 is in block shape, and has three eccentric parts, which are respectively connected with the connecting rod 7, the driving member 2 and the sliding rod 15, and the rotation of the first follower 4 can drive the connecting rod 7 and the sliding rod 15 to move when the driving member 2 rotates, so as to realize the function of the first follower 4.

[0045] The operation method of the turnover footrest device is simple, unlike the existing turnover footrest which needs to be pulled out first, and then the footrest plate is turned over, the turnover footrest device only needs to pull the driving member 2 to turn over forward while pulling out the seat, and after having enough space to turn over backward, the driving member 2 is continuously turned over backward, and after the turnover is completed, the driving member 2 and the second follower 3 are continuously pushed out forward, so as to reach the appropriate footrest position, and the user does not need to lean forward too much or get up from the seat to operate.

Claims

1. A linkage mechanism characterised in that: The device comprises a base, a first follower, a driving member and a linkage assembly. The first follower is rotatably connected to the base. The driving member is rotatably arranged on the first follower. The linkage assembly is arranged between the driving member and the base. The linkage assembly comprises a reference gear and a linkage gear which are engaged with each other. The base is fixedly connected to the reference gear. The driving member is fixedly connected to the linkage gear. The reference gear and the linkage gear are arranged in the first follower. When the driving member rotates, the linkage gear rotates on the reference gear and drives the first follower to rotate on the base.

2. The linkage mechanism of claim 1, wherein: A first rotating shaft is arranged in the center of the reference gear. The first follower is rotatably connected to the base through the first rotating shaft. A second rotating shaft is arranged in the center of the linkage gear. The first follower is rotatably connected to the driving member through the second rotating shaft. When the driving member rotates, the linkage gear rotates around the second rotating shaft and rolls along the outer edge of the reference gear to drive the first follower to rotate on the base.

3. The linkage of claim 1, wherein: A first accommodating groove and a second accommodating groove which are mutually penetrated are arranged on the first follower. The reference gear is arranged in the first accommodating groove. The linkage gear is arranged in the second accommodating groove.

4. The linkage of claim 1, wherein: The device further comprises a second follower which is rotatably connected to the base and linked to the first follower. When the driving member rotates, the first follower and the second follower rotate on the base.

5. The linkage mechanism of claim 4, wherein: The first follower has at least two eccentric parts. The driving member is rotatably arranged on one of the eccentric parts. The second follower is linked to the other eccentric part.

6. The linkage of claim 4, wherein: A connecting rod is arranged between the first follower and the second follower. One end of the connecting rod is rotatably connected to the first follower. The other end of the connecting rod is rotatably connected to the second follower.

7. The linkage mechanism of claim 6, wherein: An avoiding groove is arranged on the end of the second follower which is close to the first follower. The connecting rod is arranged in the avoiding groove.

8. The linkage of claim 1, wherein: The reference gear is integrally formed with the base. The linkage gear is integrally formed with the driving member.

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