Synchronous overturning extension structure

Abstract

The utility model discloses a synchronous overturning extension structure which comprises a base and a rotating base body rotationally installed on the base, a driving transverse rod and an extension plate are installed on the rotating base body in a sliding mode, and the end portion of the driving transverse rod is matched with a guide block in a sliding mode. The sliding direction of the guide block relative to the driving transverse rod is perpendicular to the sliding direction of the driving transverse rod relative to the rotating base body in the space, one side of the guide block is rotationally connected to the base, the rotating center of the guide block is eccentrically arranged relative to the rotating center of the rotating base body, and the rotating base body rotates. And the driving cross rod can be driven to slide on the rotating base body through the guide block. The device has the beneficial effects that through the eccentrically-arranged guide block, when the rotating base body rotates, the guide block can bear eccentric force, the eccentric force can force the driving cross rod to slide on the rotating base body, and therefore synchronous extending can be achieved while overturning is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a synchronous flipping and extending structure. Background Art

[0002] In the field of mechanical transmission technology, the flipping and extension of mechanical parts are both very common modes of movement. The flipping of mechanical parts can generally be achieved by manual flipping, motor flipping, cylinder flipping, etc., and the extension of mechanical parts can be achieved by cylinder extension, motor lead screw extension, connecting rod mechanism extension, etc. In the prior art, motion devices that combine flipping and extension are also very common. However, most of them use two sets of independent driving mechanisms to achieve the flipping and extension functions, and their overall layout structure is relatively complex. If one of the driving mechanisms is damaged, it is also very troublesome to replace it. In addition, the two sets of independent driving mechanisms also make the overall size of the flipping and extension mechanism very large, which is very crowded for some equipment with limited installation space, such as the car seat leg support.

[0003] The car seat leg rest is a device installed at the front end of the car seat frame to support the passenger's calf. It can relieve the soreness of the passenger's calf caused by long-term riding. In the prior art, most leg rests use two sets of independent driving mechanisms to respectively enable the leg rest to flip and extend forward. However, the installation space of the leg rest is very limited, and the two sets of independent driving mechanisms make the overall space occupied by the leg rest large. In addition, there are a small number of leg rests that only use a connecting rod mechanism to achieve the flipping and forward extension of the leg rest. This mechanism can achieve the flipping and forward extension of the leg rest with only one set of driving mechanism, but in actual use, a gap will be formed between the leg rest and the seat, affecting the overall comfort of use, and the overall space occupation is not reduced when the connecting rod mechanism is folded. Utility Model Content

[0004] In view of this, the utility model provides a synchronous flipping and extending structure, which aims to achieve synchronous extension and expansion during the flipping process of the mechanism, reduce the number of drive mechanism arrangements, and optimize the compactness of the structure.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A synchronous flipping and extending structure comprises a base and a rotating base rotatably mounted on the base, characterized in that a driving cross bar and an extension plate are slidably mounted on the rotating base, wherein a guide block slidably matched with the driving cross bar is provided at the end of the driving cross bar, and a sliding direction of the guide block relative to the driving cross bar and a sliding direction of the driving cross bar relative to the rotating base are perpendicular in space, one side of the guide block is rotatably connected to the base, and a rotation center of the guide block is eccentrically arranged relative to a rotation center of the rotating base, and when the rotating base rotates, the driving cross bar can be driven to slide on the rotating base through the guide block.

[0007] With the above structure, since the rotation center of the guide block is eccentrically arranged relative to the rotation center of the rotating base, when the rotating base rotates, the guide block will be subjected to eccentric force while following the rotation. The eccentric force exerted on the guide block can force the driving cross bar to slide on the rotating base, thereby realizing that the entire mechanism can be extended while flipping, and the driving cross bar is installed with a slide rail, and the overall structure is also very compact.

[0008] Preferably, a linkage mechanism is provided between the extension plate and the driving cross bar, and when the driving cross bar slides relative to the rotating base, the linkage mechanism can force the extension plate to slide synchronously. With the above structure, the linkage mechanism ensures that the driving cross bar and the extension plate can slide synchronously, and the extension plate increases the extension length of the overall structure.

[0009] Preferably, the guide block is rotatably connected to the base via a first support shaft, the rotating base is rotatably connected to the base via a second support shaft, and the first support shaft is eccentrically arranged relative to the second support shaft. The above structure can facilitate the rotation of the rotating base and the guide block.

[0010] Preferably, the rotating base is provided with a slide rail, and the driving cross bar and the extension plate are both slidably mounted on the slide rail. The above structure can ensure that the driving cross bar and the extension plate slide more smoothly.

[0011] Preferably, the linkage structure comprises a first link, a second link and a third link which are hinged in sequence, wherein the end of the first link away from the second link is hinged on the rotating base, the middle of the second link is rotatably connected to the driving crossbar, and the end of the third link away from the second link is hinged on the extension plate. The above structure ensures that the driving crossbar and the extension plate can slide synchronously, and the three-link mechanism enables the end of the extension plate to abut against the end of the driving crossbar when folded, thereby ensuring the compactness of the overall structure.

[0012] Preferably, a fourth link is provided between the first link and the third link, the two ends of the fourth link are respectively hinged to the first link and the third link, and the fourth link is arranged parallel to the second link. With the above structure, the stability of the linkage movement can be improved through the four-bar linkage.

[0013] Preferably, the rotating base is provided with two slide rails, which are arranged in parallel on both sides of the top of the rotating base. The above structure can make the overall structure more stable.

[0014] As a preference, the extension plate and the rotating base are seat leg support components. The above structure can be used to support the calves of passengers.

[0015] Preferably, a driving mechanism is provided between the base and the rotating base, and the driving mechanism is used to drive the rotating base to flip. With the above structure, the rotation of the rotating base is automatically controlled, and only one set of driving mechanisms is used to synchronously realize flipping and extension.

[0016] Preferably, the first connecting rod is hinged at the middle of one end of the rotating base body close to the base, and when folded, the driving cross rod abuts against one end of the rotating base body close to the base. With the above structure, when folded, the overall structure can be made more compact.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. With the synchronous flipping and extending structure provided by the utility model, when the rotating base is rotated, the guide block can also rotate with it. Since the rotation center of the guide block is eccentrically arranged relative to the rotation center of the rotating base, the eccentric force exerted on the guide block when it rotates can force the driving cross bar to slide on the rotating base, thereby ensuring that the overall structure can be extended while flipping.

[0019] 2. Since the extension plate and the driving cross bar are both installed in the form of slide rails, and the linkage mechanism between the extension plate and the driving cross bar adopts a connecting rod structure, it can be ensured that when folded, the extension plate and the driving cross bar can be pressed against each other, thereby ensuring the compactness of the overall structure.

[0020] 3. Since the first support shaft is eccentrically arranged relative to the second support shaft, it ensures that the entire mechanism can be extended synchronously while flipping. Only one set of driving mechanisms needs to be installed to automatically control the synchronous flipping and extension of the entire structure, further optimizing the compactness of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the rotating base 2 in a flipped and extended state (the driving mechanism 10 is fixedly installed);

[0022] Figure 2 for Figure 1 Schematic diagram of the structure in the folded state;

[0023] Figure 3A schematic diagram showing the structure of the first driving mechanism 10a;

[0024] Figure 4 It is a structural schematic diagram of the rotating base 2 in a flipped and extended state (the driving mechanism 10 is installed in a rotating manner);

[0025] Figure 5 A structural schematic diagram showing the installation state of the second driving mechanism 10b;

[0026] Figure 6 for Figure 4 Schematic diagram of the structure in a folded state;

[0027] Figure 7 A schematic diagram showing the structure of the linkage mechanism 6;

[0028] Figure 8 It is a schematic diagram showing the three-dimensional structure of the linkage mechanism 6. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with embodiments and drawings.

[0030] This embodiment is described by taking the application of the synchronous flip extension structure in the leg support of a car seat as an example.

[0031] like Figure 1 As shown, a synchronous flip extension structure includes a base 1 and a rotating base 2 rotatably mounted on the base 1. In this embodiment, the base 1 corresponds to the mounting base plate of the car seat leg rest, which is fixedly mounted on the bottom front end of the car seat frame and is mainly used to fix and support the entire leg rest. The rotating base 2 corresponds to the leg rest base plate of the car seat leg rest and can be directly used to support the passenger's calf, and can also be used to install other auxiliary components to support the passenger's calf.

[0032] Combination Figure 1 A driving cross bar 3 and an extension plate 4 are slidably mounted on the top of the rotating base 2. In this embodiment, the extension plate 4 is also a supporting member of the seat leg support, used to support the passenger's calf. Guide blocks 5 are mounted at both ends of the driving cross bar 3 to slide with it, wherein the sliding direction of the guide block 5 relative to the driving cross bar 3 is perpendicular to the sliding direction of the driving cross bar 3 relative to the rotating base 2 in space. In this embodiment, the guide block 5 slides up and down relative to the driving cross bar 3, and the driving cross bar 3 slides left and right relative to the rotating base 2, and the rotation center of the guide block 5 is eccentrically arranged relative to the rotation center of the rotating base 2.

[0033] Based on the above structure, by rotating the rotating base 2, the guide block 5 can also rotate along with the rotating base 2. Since the rotation center of the guide block 5 is eccentrically arranged relative to the rotation center of the rotating base 2, the guide block 5 will be subjected to an eccentric force when rotating. The eccentric force can force the driving cross bar 3 to slide up and down relative to the guide block 5, and force the driving cross bar 3 to slide left and right relative to the rotating base 2, thereby realizing that the leg rest can be synchronously extended when flipping.

[0034] In this embodiment, the guide block 5 is rotatably mounted on the base 1 via the first support shaft 7, the rotating base 2 is rotatably mounted on the base 1 via the second support shaft 8, and the first support shaft 7 is eccentrically arranged relative to the second support shaft 8. With such a design, the first support shaft 7 and the second support shaft 8 can better ensure the rotation of the guide block 5 and the rotating base 2.

[0035] like Figure 1 As shown, two slide rails 9 are fixedly installed on the top of the rotating base 2 by bolts, and the two slide rails 9 are parallelly distributed on both sides of the top of the rotating base 2, and the driving cross bar 3 and the extension plate 4 are slidably installed on the slide rails 9. The slide rails 9 can make the driving cross bar 3 and the extension plate 4 slide more smoothly, and the extension in the form of sliding makes the overall structure very compact, and the two parallel slide rails 9 ensure the stability of the overall structure.

[0036] In this embodiment, a linkage mechanism 6 is further installed between the extension plate 4 and the driving cross bar 3. When the driving cross bar 3 slides relative to the rotating base 2, the linkage mechanism can force the extension plate 4 to slide synchronously. At this time, the extension plate 4 plays a role in increasing the extension length. When applied to the leg support of the car seat, the extension plate 4 meets the needs of passengers of different heights for the leg support.

[0037] Specific, combined Figure 7 The linkage mechanism 6 includes a first link 6a, a second link 6b and a third link 6c which are hinged in sequence, wherein one end of the first link 6a away from the second link 6b is hinged on the rotating base 2, the middle of the second link 6b is rotatably connected to the driving cross bar 3, and one end of the third link 6c away from the second link 6b is hinged on the extension plate 4. Through the three-link mechanism, it can be ensured that the extension plate 4 and the driving cross bar 3 can slide synchronously and in the same direction relative to the slide rail 9.

[0038] For example Figure 8 As shown, a fourth link 6d is installed between the first link 6a and the third link 6c, and both ends of the fourth link 6d are hinged to the first link 6a and the third link 6c respectively, and the fourth link 6d is arranged parallel to the second link 6b, so as to form a parallelogram four-bar mechanism. Through the four-bar mechanism, the movement of the linkage mechanism 6 can be guaranteed to be more stable.

[0039] Further, combined with Figure 2 The first connecting rod 6a is hinged at the middle position of the rotating base 2 near the base end, so that in the folded state, the driving cross rod 3 can be against the rotating base 2 near the base 1 end, making the overall structure more compact.

[0040] A driving mechanism 10 is also provided between the base 1 and the rotating base 2, and the driving mechanism 10 can drive the rotating base 2 to flip relative to the base 1 around the second support shaft 8. In this embodiment, the driving mechanism 10 can be specifically divided into a first driving mechanism 10a and a second driving mechanism 10b, and the two driving mechanisms respectively represent a connection mode.

[0041] 1. Fixed installation

[0042] like Figures 1 to 3 As shown, a first driving mechanism 10a is installed between the base 1 and the rotating base 2, and the first driving mechanism 10a includes a first driving motor 10a1, a first screw rod 10a2 fixedly connected to the output shaft of the first driving motor 10a1, a first driving block 10a3 threadedly mounted on the first screw rod 10a2, and a first connecting rod 10a4 hingedly installed on the lower side of the rotating base 2, wherein the first driving motor 10a1 is fixedly installed on the base 1, and the first connecting rod 10a4 is rotatably connected to the first driving block 10a3 at one end away from the rotating base 2. In this embodiment, a guide rod 11 is fixedly mounted on the base 1, and the first driving block 10a3 is slidably mounted on the guide rod 11, so that when the first driving motor 10a1 is driven, the first driving block 10a3 can slide along the length direction of the first screw rod 10a2. With this design, when the first driving motor 10a1 is driven, the first driving block 10a3 can slide along the length direction of the first screw rod 10a2. Since the length of the first connecting rod 10a4 is fixed and the two ends are respectively hinged on the first driving block 10a3 and the rotating base 2, when the sliding distance of the first driving block 10a3 exceeds the rotation range of the first connecting rod 10a4, the sliding of the first driving block 10a3 is enough to force the rotating base 2 to rotate relative to the base 1.

[0043] 2. Rotary installation

[0044] like Figures 4 to 6 As shown, a second driving mechanism 10b is installed between the base 1 and the rotating base 2, and the second driving mechanism 10b includes a second driving motor 10b1, a second screw 10b2 fixedly connected to the output shaft of the second driving motor 10b1, a second driving block 10b3 threadedly mounted on the second screw 10b2, and a second connecting rod 10b4 fixedly installed on the lower side of the rotating base 2, wherein the second driving motor 10b1 is rotatably installed on the base 1, and the end of the second connecting rod 10b4 away from the rotating base 2 is rotatably connected to the second driving block 10b3. In this design, combined with Figure 6, driving the second driving motor 10b1, the second driving block 10b3 can move downward along the length direction of the second screw rod 10b2. Since the second driving block 10b3 is only hinged on the second connecting rod 10b4, and the second connecting rod 10b4 is fixedly installed on the rotating base 2, it is equivalent to that the second driving block 10b3 is directly hinged on the rotating base 2. This causes the second driving block 10b3 to be unable to slide freely like the first driving block 10a3. The second driving block 10b3 moves along the length direction of the second screw rod 10b2, forcing the rotating base 2 and the second driving motor 10b1 to rotate, that is, driving the second driving motor 10b1, which can force the rotating base 2 and the second driving motor 10b1 to rotate synchronously relative to the base 1.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A synchronous flipping and extending structure, comprising a base (1) and a rotating base (2) rotatably mounted on the base (1), characterized in that: A driving cross bar (3) and an extension plate (4) are slidably mounted on the rotating base (2), wherein a guide block (5) slidably matched with the driving cross bar (3) is provided at the end of the driving cross bar (3), and the sliding direction of the guide block (5) relative to the driving cross bar (3) and the sliding direction of the driving cross bar (3) relative to the rotating base (2) are perpendicular in space, one side of the guide block (5) is rotatably connected to the base (1), and the rotation center of the guide block (5) is eccentrically arranged relative to the rotation center of the rotating base (2), and the rotating base (2) can drive the driving cross bar (3) to slide on the rotating base (2) through the guide block (5) when the rotating base (2) rotates.

2. The synchronous flip extension structure according to claim 1, characterized in that: A linkage mechanism (6) is provided between the extension plate (4) and the driving cross bar (3); when the driving cross bar (3) slides relative to the rotating base (2), the linkage mechanism (6) can force the extension plate (4) to slide synchronously.

3. The synchronous flip extension structure according to claim 1, characterized in that: The guide block (5) is rotatably connected to the base (1) via a first support shaft (7), and the rotating base (2) is rotatably connected to the base (1) via a second support shaft (8), wherein the first support shaft (7) is eccentrically arranged relative to the second support shaft (8).

4. The synchronous flip extension structure according to claim 1, characterized in that: The rotating base (2) is provided with a slide rail (9), and the driving cross bar (3) and the extension plate (4) are both slidably mounted on the slide rail (9).

5. The synchronous flip extension structure according to claim 2, characterized in that: The linkage mechanism (6) comprises a first connecting rod (6a), a second connecting rod (6b) and a third connecting rod (6c) which are hinged in sequence, wherein one end of the first connecting rod (6a) away from the second connecting rod (6b) is hinged on the rotating base (2), the middle part of the second connecting rod (6b) is rotatably connected to the driving cross rod (3), and one end of the third connecting rod (6c) away from the second connecting rod (6b) is hinged on the extension plate (4).

6. The synchronous flipping and extending structure according to claim 5, characterized in that: A fourth connecting rod (6d) is also provided between the first connecting rod (6a) and the third connecting rod (6c), and both ends of the fourth connecting rod (6d) are respectively hinged to the first connecting rod (6a) and the third connecting rod (6c), and the fourth connecting rod (6d) is arranged in parallel with the second connecting rod (6b).

7. The synchronous flipping and extending structure according to claim 4, characterized in that: Two slide rails (9) are provided on the rotating base (2), and the two slide rails (9) are arranged in parallel on both sides of the top of the rotating base (2).

8. The synchronous flipping and extending structure according to claim 1, characterized in that: The extension plate (4) and the rotating base (2) are seat leg support components.

9. The synchronous flip extension structure according to claim 1, characterized in that: A driving mechanism (10) is provided between the base (1) and the rotating base (2), and the driving mechanism (10) is used to drive the rotating base (2) to flip.

10. The synchronous flipping and extending structure according to claim 5, characterized in that: The first connecting rod (6a) is hinged at the middle position of one end of the rotating base (2) close to the base (1), and in the folded state, the driving cross rod (3) abuts against one end of the rotating base (2) close to the base (1).

Images