A double linkage mechanism for opening a handrail on both sides

Abstract

The application relates to a double-link mechanism for double-side opening of a handrail, which comprises a first link capable of rotating around a first axis, a second link spaced apart from the first link in the X direction of a vehicle body and capable of rotating around a second axis opposite to a handrail box, the first axis and the second axis being spaced apart in the Y direction of the vehicle body, a base plate connected with the first link through a first connecting structure and connected with the second link through a second connecting structure, the base plate being capable of rotating around a third axis parallel to the first axis relative to the first link, the base plate rotating with the first link around the first axis, the first link being capable of rotating to the third axis coinciding with the second axis, the base plate being capable of rotating around a fourth axis parallel to the second axis relative to the second link, the base plate rotating with the second link around the second axis, and the second link being capable of rotating to the fourth axis coinciding with the first axis. The application can improve the consistency of double-side opening and closing of a handrail cover, and improve the connecting strength and stability of the handrail cover and the handrail box.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a double-link mechanism for opening an armrest on both sides. Background Art

[0002] The mid-range and high-end cars on the market have armrests with a two-way side-opening function. That is, in the closed state, the armrest cover assembly serves as an elbow support and can meet the rigidity requirements. When the armrest cover is flipped open from the left side, the driver can take items from the trunk; when the armrest cover is flipped open from the right side, the co-driver can take items from the trunk.

[0003] The double-opening armrests on the market are generally controlled by a single-link mechanism. The weight on both sides of the single-rod structure armrest is uneven, and the opening angles of the left and right sides are inconsistent, resulting in unstable performance such as the consistency and rigidity of the opening and closing of the double-sided armrests. Summary of the Invention

[0004] Based on the above description, the present invention provides a double-link mechanism for opening the armrest on both sides to solve the problems of uneven weight on both sides of the single-rod structure armrest, inconsistent opening angles on the left and right sides, and too fast or too slow opening speeds on the left and right sides, resulting in unstable performance such as consistency and rigidity of the opening and closing of the double-sided armrests.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] This application provides a double-link mechanism for opening an armrest on both sides, and the technical solution adopted is as follows:

[0007] A double-link mechanism for opening an armrest on both sides, comprising:

[0008] a first connecting rod, which is connected to the armrest box and can rotate relative to the armrest box about a first axis parallel to the X-axis of the vehicle body;

[0009] a second connecting rod spaced apart from the first connecting rod in the X-direction of the vehicle body, the second connecting rod being connected to the armrest box and rotatable relative to the armrest box about a second axis parallel to the X-direction of the vehicle body, the first axis and the second axis being spaced apart in the Y-direction of the vehicle body;

[0010] A substrate is provided between the first link and the second link, the substrate is connected with the first link through a first connecting structure and connected with the second link through a second connecting structure, the first connecting structure allows the substrate to rotate relative to the first link around a third axis parallel to the first axis and allows the substrate to rotate with the first link around the first axis, and the first link can be rotated to the third axis coinciding with the second axis, the second connecting structure allows the substrate to rotate relative to the second link around a fourth axis parallel to the second axis and allows the substrate to rotate with the second link around the second axis, and the second link can be rotated to the fourth axis coinciding with the first axis.

[0011] Preferably, the first connecting structure limits the relative rotation between the substrate and the first link when the third axis does not coincide with the second axis, and the second connecting structure limits the relative rotation between the substrate and the second link when the fourth axis does not coincide with the first axis.

[0012] Preferably, a first locking structure is provided between the first link and the armrest box, the first locking structure is used to limit the rotation of the first link around the first axis when the third axis coincides with the second axis, and the first locking structure can release the limitation on the first link.

[0013] A second locking structure is provided between the second link and the armrest box, the second locking structure is used to limit the rotation of the second link around the second axis when the fourth axis coincides with the first axis, and the second locking structure can release the limitation on the second link.

[0014] Preferably, a first elastic member is provided between the substrate and the first link, and a second elastic member is provided between the substrate and the first link, the substrate overcomes the elastic force of the second elastic member when the second link rotates from the state that the third axis does not coincide with the second axis to the state that the third axis coincides with the second axis, and the substrate overcomes the elastic force of the first elastic member when the second link rotates from the state that the fourth axis does not coincide with the first axis to the state that the fourth axis coincides with the first axis.

[0015] Preferably, the first locking structure comprises:

[0016] a first lock hole provided on the armrest box;

[0017] a first lock rod connected to the first link and movable relative to the first link along the direction of the third axis, when the third axis coincides with the second axis, the first lock rod can be moved to be inserted into the first lock hole to limit the rotation of the first link around the first axis;

[0018] The second locking structure comprises:

[0019] - a second lock hole arranged on the armrest box;

[0020] - a second lock rod connected to the second connecting rod and movable relative to the second connecting rod along a fourth axis direction, when the fourth axis coincides with the first axis, the second lock rod is movable to be inserted into the second lock hole to limit rotation of the second lock rod around the second axis.

[0021] Preferably, the first lock rod is coaxial with the third axis and rotatable relative to the first connecting rod around its own axis, and the second lock rod is coaxial with the fourth axis and rotatable relative to the second connecting rod around its own axis.

[0022] The base plate is provided with a first driving assembly and a second driving assembly, the first driving assembly is connected with the first lock rod for driving the first lock rod to move along the third axis direction, and the second driving assembly is connected with the second lock rod for driving the second lock rod to move along the fourth axis direction.

[0023] Preferably, the first driving assembly comprises:

[0024] - a first driving member connected to the base plate and movable relative to the base plate along a direction perpendicular to the third axis;

[0025] - a first connecting member connected with the first lock rod and connected with the first driving member through a first driving structure, adapted to drive the first connecting member to move along the third axis direction through the first driving structure when the first driving member moves;

[0026] The second driving assembly comprises:

[0027] - a second driving member connected to the base plate and movable relative to the base plate along a direction perpendicular to the third axis;

[0028] - a second connecting member connected with the second lock rod and connected with the second driving member through a second driving structure, adapted to drive the second connecting member to move along the third axis direction through the second driving structure when the second driving member moves;

[0029] Wherein, the first driving member comprises a locking state of moving the first lock rod to be inserted into the first lock hole, and an unlocking state of moving the first lock rod to be separated from the first lock hole, the second driving member comprises a locking state of moving the second lock rod to be inserted into the second lock hole, and an unlocking state of moving the second lock rod to be separated from the second lock hole, the second driving member is limited to move to the unlocking state when the first driving member is in the unlocking state, and the first driving member is limited to move to the unlocking state when the second driving member is in the unlocking state.

[0030] Preferably, the first driving assembly comprises:

[0031] a third elastic member arranged between the first driving member and the base plate, the first driving member overcoming the elastic force of the third elastic member when moving from the locked state to the unlocked state;

[0032] a first limiting structure arranged between the first driving member and the base plate, adapted to limit the movement of the first driving member to the locked state when the third axis and the second axis are not coincident and the first driving member is in the unlocked state, and adapted to release the limitation of the first driving member by the first limiting structure through the first unlocking structure on the armrest box when the first connecting rod rotates from the state that the third axis and the second axis are not coincident to the state that the third axis and the second axis are coincident;

[0033] The second driving assembly comprises:

[0034] a fourth elastic member arranged between the second driving member and the base plate, the second driving member overcoming the elastic force of the fourth elastic member when moving from the locked state to the unlocked state;

[0035] a second limiting structure arranged between the second driving member and the base plate, adapted to limit the movement of the second driving member to the locked state when the fourth axis and the first axis are not coincident and the second driving member is in the unlocked state, and adapted to release the limitation of the second driving member by the second limiting structure through the second unlocking structure on the armrest box when the second connecting rod rotates from the state that the fourth axis and the first axis are not coincident to the state that the fourth axis and the first axis are coincident.

[0036] Preferably, the first limiting structure comprises:

[0037] a first elastic part connected to the first driving member;

[0038] a first limiting part arranged on the first elastic part and a second limiting part arranged on the base plate, the projection of the first limiting part and the second limiting part in the moving direction of the first driving member intersects when the first elastic part is not deformed, and the first elastic part can be elastically deformed to the state that the projection of the first limiting part and the second limiting part in the moving direction of the first driving member does not intersect, adapted to drive the first elastic part to elastically deform by the cooperation of the second limiting part and the first limiting part when the first driving member moves from the locked state to the unlocked state, so that the first limiting part moves from one side of the second limiting part to the other side;

[0039] Wherein, when the first driving member is in the unlocking state and is limited by the first limiting part and the second limiting part to move to the locking state, and the first connecting rod rotates from the state that the third axis and the second axis are not coincident to the state that the third axis and the second axis are coincident, the first elastic part is deformed by the first unlocking structure on the armrest box to the state that the projection of the first limiting part and the second limiting part in the moving direction of the first driving member is not intersected, so as to release the limitation of the first limiting part and the second limiting part on the movement of the first driving member.

[0040] Preferably, the third locking rod and the fourth locking rod are arranged on the substrate and can move relative to the substrate along the third axis direction, the first connecting rod is provided with a third locking hole for cooperating with the third locking rod, and the second connecting rod is provided with a fourth locking hole for cooperating with the fourth locking rod, so as to limit the rotation of the substrate relative to the first connecting rod by inserting the third locking rod into the third locking hole on the first connecting rod when the substrate rotates with the first connecting rod around the first axis, or limit the rotation of the substrate relative to the second connecting rod by inserting the fourth locking rod into the fourth locking hole when the substrate rotates with the second connecting rod around the second axis.

[0041] Preferably, the first driving assembly is further used for driving the fourth locking rod to move, the second driving assembly is further used for driving the third locking rod to move, the first driving assembly simultaneously drives the first locking rod and the fourth locking rod to move, so that the first locking rod is inserted into the first locking hole and the fourth locking rod is inserted into the fourth locking hole, or the first locking rod is separated from the first locking hole and the fourth locking rod is separated from the fourth locking hole, and the second driving assembly simultaneously drives the second locking rod and the third locking rod to move, so that the second locking rod is inserted into the second locking hole and the third locking rod is inserted into the third locking hole, or the second locking rod is separated from the second locking hole and the third locking rod is separated from the third locking hole.

[0042] Compared with the prior art, the technical scheme of the present application has the following beneficial technical effects:

[0043] 1. The first connecting rod and the second connecting rod are arranged, the first connecting rod and the second connecting rod rotate around the first axis and the second axis respectively, the first axis and the second axis are arranged at intervals in the Y direction of the vehicle body, the first axis and the second axis are distributed on both sides of the armrest box in design, the base plate is connected with the armrest cover, the first connecting rod rotates to coincide with the third axis and the second axis, and the second connecting rod rotates to coincide with the fourth axis and the first axis, at this time, the base plate is in a closed state of the armrest box, that is, the armrest cover is in a closed state, when the base plate rotates around the first axis with the first connecting rod, the armrest cover is opened from one side of the armrest box, when the base plate rotates around the second axis with the second connecting rod, the armrest cover is opened from the other side of the armrest box, thereby realizing the function of opening the armrest cover on both sides, and the opening angle on both sides is not limited, the armrest cover can have a larger opening angle on both sides, when the base plate rotates around the first axis with the first connecting rod, the base plate rotates relative to the second connecting rod at the same time, and the base plate is limited to rotate relative to the first connecting rod, on the contrary, when the base plate rotates around the second axis with the second connecting rod, the base plate rotates relative to the first connecting rod at the same time, and the base plate is limited to rotate relative to the second connecting rod, thereby improving the stability of the base plate, that is, the armrest cover, when opening to one side, the first connecting rod and the second connecting rod are designed symmetrically, which can make the weight of the armrest cover on both sides uniform, the opening angle on the left and right sides consistent, improve the consistency of opening and closing of the armrest cover on both sides, and improve the connection strength and stability of the armrest cover and the armrest box, to ensure that the rigidity of the armrest as an elbow support meets the requirements;

[0044] 2. The first locking structure and the second locking structure are arranged, the first locking structure limits the rotation of the first connecting rod around the first axis when the third axis coincides with the second axis, and the second locking structure is used to limit the rotation of the second connecting rod around the second axis when the fourth axis coincides with the first axis, when the armrest box is in a closed state, the first locking structure and the second locking structure limit the rotation of the first connecting rod and the second connecting rod respectively, thereby limiting the opening of the armrest cover, so that the armrest cover can play a role in elbow support when the armrest box is not opened, at the same time, when the second locking structure is unlocked and the base plate rotates with the second connecting rod, the first locking structure limits the rotation of the first connecting rod, which can ensure the stability of the base plate when rotating, on the contrary, when the first locking structure is unlocked and the base plate rotates with the first connecting rod, the second locking structure limits the rotation of the second connecting rod, which can ensure the stability of the base plate when rotating;

[0045] 3、The first elastic member and the second elastic member are arranged, when the base plate rotates with the first connecting rod from the state that the third axis and the second axis are not coincident to the state that the third axis and the second axis are coincident, the base plate overcomes the elastic force of the second elastic member, when the base plate rotates with the second connecting rod from the state that the fourth axis and the first axis are not coincident to the state that the fourth axis and the first axis are coincident, the base plate overcomes the elastic force of the first elastic member, that is, when the third axis and the second axis are coincident, the second elastic member is in the elastic deformation state, the base plate and the first connecting rod are subjected to the elastic force of the second elastic member, the first locking structure can be used to limit the rotation of the first connecting rod to keep the base plate in the closed state, when the first locking structure is unlocked, the base plate and the first connecting rod can rotate under the elastic force of the second elastic member, that is, the armrest cover can be automatically opened under the action of the second elastic member, on the contrary, when the fourth axis and the first axis are coincident, the first elastic member is in the elastic deformation state, the base plate and the second connecting rod are subjected to the elastic force of the first elastic member, the second locking structure can be used to limit the rotation of the second connecting rod to keep the base plate in the closed state, when the second locking structure is unlocked, the base plate and the second connecting rod can rotate under the elastic force of the first elastic member, that is, the armrest cover can be automatically opened under the action of the first elastic member, the function of automatic opening and keeping of the armrest cover is realized;

[0046] 4、The first driving assembly and the second driving assembly are arranged to drive the movement of the first locking rod and the second locking rod respectively, the fixed state or the relatively rotatable state of the first connecting rod and the second connecting rod and the armrest box is switched, the first driving member in the first driving assembly and the second driving member in the second driving assembly can be operated by a person to realize the function that the person controls the locking and unlocking of the armrest cover when the armrest cover is closed, and the use requirement of the person for the auxiliary armrest box is met;

[0047] 5. The present application provides a first limiting structure and a second limiting mechanism. When the first driving component is in the unlocked state, the armrest cover rotates to one side around the first axis to open, and the first limiting structure limits the first driving component to move to the locked state to prevent the position of the first locking rod from affecting the normal closing of the armrest cover. At the same time, the first driving member limits the second driving member to move to the unlocked state in the unlocked state, so that the second locking rod remains inserted into the second lock hole, so as to improve the stability of the armrest cover rotating around the first axis. When the armrest cover needs to be closed, the first unlocking structure on the armrest box is used to release the restriction on the movement of the first driving member by the first limiting structure. When the first connecting rod rotates until the third axis and the second axis coincide, the first driving member is reset under the action of the third elastic member, driving the first locking rod to move to insert into the first lock hole, thereby locking the first connecting rod. When the second driving assembly is in the unlocked state, the second locking structure restricts the second driving member from moving toward the locked state, so that the first locking rod remains inserted into the first locking hole, thereby improving the stability of the armrest cover rotating around the second axis. When the armrest cover is closed, the second unlocking structure on the armrest box is used to release the restriction on the movement of the second driving member. When the second connecting rod rotates until the fourth axis coincides with the first axis, the second driving member is reset under the action of the fourth elastic member, driving the second locking rod to move and insert into the second locking hole, thereby locking the second connecting rod and the base plate, and automatically locking the armrest cover. Therefore, the first limiting structure and the second limiting mechanism make the armrest cover more stable when it is opened to one side, and the third elastic member and the fourth elastic member can achieve the purpose of automatic locking when the armrest cover is closed.

[0048] 6. The double-link mechanism of the present application can be designed with a symmetrical structure to achieve universalization of parts and reduce parts costs. Parts can be installed on both sides, reducing installation error prevention costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic structural diagram of a double-link mechanism for opening an armrest on both sides provided by an embodiment of the present invention;

[0050] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle;

[0051] Figure 3 for Figure 1 A magnified schematic diagram of area B in the middle;

[0052] Figure 4 A top view of a double-link mechanism for double-sided opening of an armrest provided in an embodiment of the present invention;

[0053] Figure 5 for Figure 4 Enlarged schematic diagram of the middle C area;

[0054] Figure 6 For Figure 4 Enlarged schematic view of the middle D area;

[0055] Figure 7 Schematic view of the first limiting structure in the double connecting rod mechanism for opening the handrail on both sides provided by the embodiment of the application;

[0056] Figure 8 Schematic view of the second limiting structure in the double connecting rod mechanism for opening the handrail on both sides provided by the embodiment of the application;

[0057] Figure 9 Schematic view of the cooperation state between the first unlocking column in the first limiting structure in the double connecting rod mechanism for opening the handrail on both sides and the side wall of the handrail box.

[0058] In the drawings, the components represented by each reference numeral are listed as follows:

[0059] 1, first connecting rod; 11, third lock hole; 2, second connecting rod; 21, fourth lock hole; 3, base plate; 31, first mounting block; 32, second mounting block; 33, second limiting part; 34, fourth limiting part; 4, first locking structure; 41, first lock rod; 42, first lock hole; 5, second locking structure; 51, second lock rod; 52, second lock hole; 6, first elastic member; 7, second elastic member; 8, first driving assembly; 81, first driving member; 811, first driving groove; 812, fourth driving groove; 82, first connecting member; 83, third elastic member; 84, first elastic part; 841, first limiting part; 842, first unlocking column; 85, first elastic wire; 9, second driving assembly; 91, second driving member; 911, second driving groove; 912, third driving groove; 92, second connecting member; 93, fourth elastic member; 94, second elastic part; 941, third limiting part; 942, second unlocking column; 95, second elastic wire; 10, third lock rod; 101, fourth lock rod. DETAILED DESCRIPTION

[0060] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0062] It will be understood that the spatially relative terms "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can also be oriented in the other direction, and the spatially relative terms used herein are intended to encompass such additional

[0063] It is noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through one or more intervening elements. "Connected" as used in the following embodiments, if the connected circuit, module, unit, etc. has the transmission of electrical signal or data between each other, should be understood as "electrically connected", "communicatively connected" and the like.

[0064] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", or the like, when used in this specification, specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0065] Reference Figures 1-9As shown, the embodiment of the present application provides a double connecting rod mechanism for opening the both sides of the handrail, which comprises a first connecting rod 1, a second connecting rod 2 and a base plate 3. The first connecting rod 1 and the second connecting rod 2 are spaced apart along the X direction of the vehicle body. The first connecting rod 1 and the second connecting rod 2 are both used for connecting with the handrail box. The first connecting rod 1 can rotate relative to the handrail box about a first axis parallel to the X direction of the vehicle body. The second connecting rod 2 can rotate relative to the handrail box about a second axis parallel to the X direction of the vehicle body. The first axis and the second axis are spaced apart along the Y direction of the vehicle body. The base plate 3 is used for connecting with the handrail cover. The base plate 3 is arranged between the first connecting rod 1 and the second connecting rod 2. The base plate 3 is connected with the first connecting rod 1 through a first connecting structure and connected with the second connecting rod 2 through a second connecting structure. The first connecting structure enables the base plate 3 to rotate relative to the first connecting rod 1 about a third axis parallel to the first axis and enables the base plate 3 to rotate with the first connecting rod 1 about the first axis. The first connecting rod 1 can be rotated to the third axis coinciding with the second axis. The second connecting structure enables the base plate 3 to rotate relative to the second connecting rod 2 about a fourth axis parallel to the second axis and enables the base plate 3 to rotate with the second connecting rod 2 about the second axis. The second connecting rod 2 can be rotated to the fourth axis coinciding with the first axis. When the third axis does not coincide with the second axis, the second connecting structure restricts the relative rotation between the base plate 3 and the first connecting rod 1. When the fourth axis does not coincide with the first axis, the first connecting structure restricts the relative rotation between the base plate 3 and the second connecting rod 2.

[0066] With reference to Figures 1-3 Specifically, as shown, the first connecting rod 1 and the second connecting rod 2 are both arranged with the axis perpendicular to the X direction of the vehicle body. One end of the first connecting rod 1 is connected with the handrail box and can rotate about the first axis. The first connecting structure connects the other end of the first connecting rod 1 and the base plate 3. One end of the second connecting rod 2 is connected with the handrail box and can rotate about the second axis. The second connecting structure connects the other end of the second connecting rod 2 and the base plate 3. The first connecting structure comprises a first mounting block 31 and a first rotating shaft. The first mounting block 31 is fixed with the base plate 3. The axis of the first rotating shaft is parallel to the X direction of the vehicle body. The two ends of the first rotating shaft are rotatably connected with the first connecting rod 1 and the first mounting block 31 respectively. The first rotating shaft can rotate with the first connecting rod 1 to be coaxial with the second axis. The third axis is the axis of the first rotating shaft. The second connecting structure comprises a second mounting block 32 and a second rotating shaft. The second mounting block 32 is fixed with the base plate 3. The axis of the second rotating shaft is parallel to the X direction of the vehicle body. The two ends of the second rotating shaft are rotatably connected with the second connecting rod 2 and the second mounting block 32 respectively. The second rotating shaft can rotate with the second connecting rod 2 to be coaxial with the first axis. The fourth axis is the axis of the second rotating shaft.

[0067] With reference to Figures 1-3As shown, when the first link 1 rotates to the third axis coincides with the second axis and the second link 2 rotates to the fourth axis coincides with the first axis, the base plate 3 and the connected armrest cover are in the closed state. In order to keep the armrest cover in this state as a stable elbow support, a first locking structure 4 is arranged between the first link 1 and the armrest box, which is used to limit the rotation of the first link 1 around the first axis when the third axis coincides with the second axis, and the first locking structure 4 can release the limitation of the first link 1. A second locking structure 5 is arranged between the second link 2 and the armrest box, which is used to limit the rotation of the second link 2 around the second axis when the fourth axis coincides with the first axis, and the second locking structure 5 can release the limitation of the second link 2.

[0068] Referring to Figures 2-3 As shown, the first locking structure 4 includes a first lock hole 42 arranged on the armrest box and a first lock rod 41 connected to the first link 1 and movable relative to the first link 1 along the direction of the third axis. When the third axis coincides with the second axis, the first lock rod 41 can be moved to insert into the first lock hole 42 to limit the rotation of the first lock rod 41 around the first axis. The second locking structure 5 includes a second lock hole 52 arranged on the armrest box and a second lock rod 51 connected to the second link 2 and movable relative to the second link 2 along the direction of the fourth axis. When the fourth axis coincides with the first axis, the second lock rod 51 can be moved to insert into the second lock hole 52 to limit the rotation of the second lock rod 51 around the second axis.

[0069] Referring to Figures 2-3 As shown, further, in order to automatically pop open the armrest cover when the first locking structure 4 or the second locking structure 5 is in the unlocked state, a first elastic member 6 is arranged between the base plate 3 and the first link 1, and a second elastic member 7 is arranged between the base plate 3 and the second link 2. When the base plate 3 rotates with the first link 1 from the state that the third axis does not coincide with the second axis to the state that the third axis coincides with the second axis, the base plate 3 overcomes the elastic force of the second elastic member 7. When the base plate 3 rotates with the second link 2 from the state that the fourth axis does not coincide with the first axis to the state that the fourth axis coincides with the first axis, the base plate 3 overcomes the elastic force of the first elastic member 6.

[0070] Specifically, the first elastic member 6 and the second elastic member 7 are torsion springs, the first elastic member 6 is coaxially sleeved outside the first rotating shaft and connected with the first mounting block 31 and the first connecting rod 1 at two ends, and the second elastic member 7 is coaxially sleeved outside the second rotating shaft and connected with the second mounting block 32 and the second connecting rod 2 at two ends. When the first connecting rod 1 rotates to the third axis coinciding with the second axis, the second elastic member 7 is in an elastic deformation state, at this time, the first elastic member 6 can be inserted into the first lock hole 42 to resist the elastic force of the first elastic member 6 to make the first connecting rod 1 remain in this state, and when the first lock rod 41 is separated from the first lock hole 42, the first lock rod 41 and the base plate 3 can rotate to an open state under the elastic force of the second elastic member 7, that is, the armrest cover can be automatically opened. Similarly, when the fourth axis coincides with the first axis, the first elastic member 6 is in an elastic deformation state, at this time, the second lock rod 51 can be inserted into the second lock hole 52 to resist the elastic force of the first elastic member 6, and when the second lock rod 51 is separated from the second lock hole 52, the base plate 3 and the second lock rod 51 can rotate under the elastic force of the first elastic member 6, and the armrest cover is automatically opened. Therefore, the first elastic member 6 and the second elastic member 7 can realize the function of automatically opening the armrest cover.

[0071] Referring to Figure 1 and Figure 4 Further, the first driving assembly 8 and the second driving assembly 9 are arranged on the base plate 3, the first driving assembly 8 is connected with the first lock rod 41 for driving the first lock rod 41 to move along the third axis direction, and the second driving assembly 9 is connected with the second lock rod 51 for driving the second lock rod 51 to move along the fourth axis direction. Since the base plate 3 needs to be rotatable relative to the first connecting rod 1 and the second connecting rod 2, in order to avoid the first driving assembly 8 and the second driving assembly 9 affecting this function, the first lock rod 41 is arranged coaxially with the third axis and rotatable relative to the first connecting rod 1 about the axis of the first lock rod 41, and the second lock rod 51 is arranged coaxially with the fourth axis and rotatable relative to the second connecting rod 2 about the axis of the second lock rod 51. At this time, the first driving assembly 8 and the second driving assembly 9 can be arranged on the base plate 3 to drive the first lock rod 41 and the second lock rod 51 to move respectively, and do not affect the rotation of the base plate 3 relative to the first lock rod 41 and the second lock rod 51.

[0072] Referring to Figures 2-3 Specifically, the first rotating shaft and the second rotating shaft are both hollow structures, the first lock rod 41 is arranged in the first rotating shaft and coaxial with the first rotating shaft, and the first lock rod 41 is rotatable relative to the first rotating shaft and movable along the axis direction relative to the first rotating shaft, and the second lock rod 51 is arranged in the second rotating shaft and coaxial with the second rotating shaft, and the second lock rod 51 is rotatable relative to the second rotating shaft and movable along the axis direction relative to the second rotating shaft.

[0073] Referring to Figures 4-6As shown, further, the first driving assembly 8 comprises a first driving member 81 and a first connecting member 82, the first driving member 81 is connected to the substrate 3 and can move relative to the substrate 3 in a direction perpendicular to the third axis, the first connecting member 82 is connected with the first locking rod 41 and connected with the first driving member 81 through a first driving structure, and is adapted to drive the first connecting member 82 to move along the third axis direction through the first driving structure when the first driving member 81 moves; the second driving assembly 9 comprises a second driving member 91 and a second connecting member 92, the second driving member 91 is connected to the substrate 3 and can move relative to the substrate 3 in a direction perpendicular to the third axis, the second connecting member 92 is connected with the second locking rod 51 and connected with the second driving member 91 through a second driving structure, and is adapted to drive the second connecting member 92 to move along the third axis direction through the second driving structure when the second driving member 91 moves.

[0074] Referring to Figures 4-6 As shown, in the embodiment, the plane of the substrate 3 is parallel to the plane formed by the first rotation axis and the second rotation axis, the moving direction of the first driving member 81 and the second driving member 91 is parallel to the plane of the substrate 3, and the first driving member 81 and the second driving member 91 are distributed in a direction parallel to the plane of the substrate 3 and perpendicular to the third axis.

[0075] Specifically, the first driving member 81 comprises a first driving block, the second driving member 91 comprises a second driving block, the first connecting member 82 comprises a first connecting block which is fixedly connected with the first locking rod 41, and the second connecting member 92 comprises a second connecting block which is fixedly connected with the second locking rod 51.

[0076] Referring to Figures 5-6 As shown, the first driving structure comprises a first driving slot 811 and a first driving column, the first driving slot 811 is opened on the first driving block, the first driving slot 811 is opened in a direction parallel to the plane of the substrate 3, and the two ends of the extension direction of the first driving slot 811 are distributed in the third axis direction and in the moving direction of the first driving member 81, the first driving column is embedded in the first driving slot 811 and fixed with the first connecting block, so that when the first driving block moves, the first driving column can be driven to move in the third axis direction through the first driving slot 811, so as to drive the first locking rod 41 to move in the third axis direction. The second driving structure comprises a second driving slot 911 and a second driving column, the second driving slot 911 is opened on the second driving block, the second driving slot 911 is opened in a direction parallel to the plane of the substrate 3, and the two ends of the extension direction of the second driving slot 911 are distributed in the third axis direction and in the moving direction of the second driving member 91, the second driving column is embedded in the second driving slot 911 and fixed with the second connecting block, so that when the second driving block moves, the second driving column can be driven to move in the third axis direction through the second driving slot 911, so as to drive the second locking rod 51 to move in the third axis direction.

[0077] In the embodiment, the first driving block is connected with a button penetrating the armrest cover at one end away from the second driving block, and the second driving block is connected with a button penetrating the armrest cover at one end away from the first driving block. The first driving slot 811 and the second driving slot 911 are arranged such that when the first driving block moves towards the second driving block, the first locking rod 41 is driven to move towards the direction of disengaging from the first locking hole 42, and when the second driving block moves towards the first driving block, the second locking rod 51 is driven to move towards the direction of disengaging from the second locking hole 52. In this way, when it is needed to unlock the armrest cover, a person can press the button to move the first driving block or the second driving block, so as to move the first locking rod 41 or the second locking rod 51 to unlock the armrest cover.

[0078] Referring to Figures 4-6 Further, the first driving member 81 includes a locking state in which the first locking rod 41 is moved to be inserted into the first locking hole 42, and an unlocking state in which the first locking rod 41 is moved to be disengaged from the first locking hole 42, and the second driving member 91 includes a locking state in which the second locking rod 51 is moved to be inserted into the second locking hole 52, and an unlocking state in which the second locking rod 51 is moved to be disengaged from the second locking hole 52. The first driving assembly 8 further includes a third elastic member 83 arranged between the first driving member 81 and the base plate 3, and when the first driving member 81 is moved from the locking state to the unlocking state, the third elastic member 83 is overcome by the elastic force. The second driving assembly 9 further includes a fourth elastic member 93 arranged between the second driving member 91 and the base plate 3, and when the second driving member 91 is moved from the locking state to the unlocking state, the fourth elastic member 93 is overcome by the elastic force. When the first driving member 81 is moved to the unlocking state by pressing the button, the third elastic member 83 is overcome by the elastic force, and when the second driving member 91 is moved to the unlocking state by pressing the button, the fourth elastic member 93 is overcome by the elastic force. After the button is released, the first driving member 81 is reset to the locking state by the elastic force of the third elastic member 83, and the second driving member 91 is reset to the locking state by the elastic force of the fourth elastic member 93. When the armrest cover is closed, the first locking rod 41 can be automatically inserted into the first locking hole 42 by the third elastic member 83, and the second locking rod 51 can be automatically inserted into the second locking hole 52 by the fourth elastic member 93, so as to quickly lock the armrest cover. In the embodiment, the third elastic member 83 and the fourth elastic member 93 are both compression springs, the axis of the third elastic member 83 is parallel to the moving direction of the first driving member 81, and the axis of the fourth elastic member 93 is parallel to the moving direction of the second elastic member 7.

[0079] Referring to Figures 4-6As shown, further, the third locking rod 10 and the fourth locking rod 101 are arranged on the substrate 3 and can move relative to the substrate 3 along the third axis direction. The first connecting rod 1 is provided with a third locking hole 11 for cooperating with the third locking rod 10, and the second connecting rod 2 is provided with a fourth locking hole 21 for cooperating with the fourth locking rod 101. When the substrate 3 rotates with the first connecting rod 1 around the first axis, the third locking rod 10 is inserted into the third locking hole 11 on the first connecting rod 1 to limit the rotation of the substrate 3 relative to the first connecting rod 1. When the substrate 3 rotates with the second connecting rod 2 around the second axis, the fourth locking rod 101 is inserted into the fourth locking hole 21 to limit the rotation of the substrate 3 relative to the second connecting rod 2.

[0080] The first driving assembly 8 is further configured to drive the fourth locking rod 101 to move, and the second driving assembly 9 is further configured to drive the third locking rod 10 to move. The first driving assembly 8 simultaneously drives the first locking rod 41 and the fourth locking rod 101 to move, so that the first locking rod 41 is inserted into the first locking hole 42 and the fourth locking rod 101 is inserted into the fourth locking hole 21, or the first locking rod 41 is separated from the first locking hole 42 and the fourth locking rod 101 is separated from the fourth locking hole 21. The second driving assembly 9 simultaneously drives the second locking rod 51 and the third locking rod 10 to move, so that the second locking rod 51 is inserted into the second locking hole 52 and the third locking rod 10 is inserted into the third locking hole 11, or the second locking rod 51 is separated from the second locking hole 52 and the third locking rod 10 is separated from the third locking hole 11.

[0081] Referring to Figures 4-6 Specifically, the first locking rod 41 and the fourth locking rod 101 are arranged on both sides of the first driving member 81, and the first driving member 81 is further provided with a fourth driving groove 812. Correspondingly, the fourth driving column connected to the fourth locking rod 101 is embedded in the fourth driving groove 812, so that the first driving member 81 moves synchronously to drive the first locking rod 41 and the fourth locking rod 101 to move close to or away from each other. The third locking rod 10 and the second locking rod 51 are arranged on both sides of the second driving member 91, and the second driving member 91 is further provided with a third driving groove 912. Correspondingly, the third driving column connected to the third locking rod 10 is embedded in the third driving groove 912, so that the second driving member 91 moves synchronously to drive the second locking rod 51 and the third locking rod 10 to move. Thus, when the armrest cover is opened to one side by rotating with one connecting rod, the other side is locked and the substrate 3 and the other connecting rod are fixed at the same time, so as to improve the stability of the armrest cover when it is opened.

[0082] Further, the first driving member 81 and the second driving member 91 are configured to limit the movement of the second driving member 91 to the unlocking state when the first driving member 81 is in the unlocking state, and limit the movement of the first driving member 81 to the unlocking state when the second driving member 91 is in the unlocking state. That is, when the first driving member 81 drives the first locking rod 41 to disengage from the first locking hole 42, the second locking rod 51 cannot move to disengage from the second locking hole 52, and vice versa. When the armrest cover is flipped open on one side, the other side is locked and cannot be opened. Specifically, the first driving member 81 is configured to abut against the second driving member 91 when in the unlocking state, thereby limiting the movement of the second driving member 91 to the unlocking state. Correspondingly, the second driving member 91 is configured to abut against the first driving member 81 when in the unlocking state, thereby limiting the movement of the first driving member 81 to the unlocking state.

[0083] With reference to Figures 7-8 To achieve the above functions, the first driving assembly 8 further comprises a first limiting structure disposed between the first driving member 81 and the base plate 3. The first limiting structure is adapted to limit the movement of the first driving member 81 to the locking state when the third axis and the second axis are not coincident and the first driving member 81 is in the unlocking state, and is adapted to release the limitation of the first driving member 81 by the first limiting structure when the first connecting rod 1 rotates from the state where the third axis and the second axis are not coincident to the state where the third axis and the second axis are coincident, through the first unlocking structure on the armrest box. The second driving assembly 9 further comprises a second limiting structure disposed between the second driving member 91 and the base plate 3. The second limiting structure is adapted to limit the movement of the second driving member 91 to the locking state when the fourth axis and the first axis are not coincident and the second driving member 91 is in the unlocking state, and is adapted to release the limitation of the second driving member 91 by the second limiting structure when the second connecting rod 2 rotates from the state where the fourth axis and the first axis are not coincident to the state where the fourth axis and the first axis are coincident, through the second unlocking structure on the armrest box.

[0084] The first limiting structure and the second limiting structure can make the handrail cover open on one side and be locked on the other side, thereby improving the stability of the handrail cover when it is opened. Meanwhile, when the handrail cover is opened around the first axis, the first lock rod 41 is kept in a state of being unable to be inserted into the first lock hole 42, and the first lock rod 41 does not affect the closing action of the handrail cover in the opened state. Correspondingly, when the handrail cover is opened around the second axis, the second lock rod 51 is kept in a state of being unable to be inserted into the second lock hole 52, and the second lock rod 51 does not affect the closing action of the handrail cover. The first unlocking structure and the second unlocking structure on the handrail box can release the restriction of the first limiting structure on the first driving member 81 when the handrail cover is closed, so that the first driving member 81 can be moved to the locking state under the elastic force of the third elastic member 83, and the first lock rod 41 can be automatically inserted into the first lock hole 42 to lock the handrail cover. Similarly, the second limiting structure and the second unlocking structure can make the second lock rod 51 automatically inserted into the second lock hole 52 to lock the handrail cover when the handrail cover is closed.

[0085] Referring to Figure 7 Specifically, the first limiting structure includes a first elastic portion 84, a first limiting portion 841 and a second limiting portion 33. The first elastic portion 84 is connected to the first driving member 81, the first limiting portion 841 is arranged on the first elastic portion 84, and the second limiting portion 33 is arranged on the base plate 3. In the undeformed state of the first elastic portion 84, the projections of the first limiting portion 841 and the second limiting portion 33 in the moving direction of the first driving member 81 intersect. The first elastic portion 84 can be elastically deformed to make the projections of the first limiting portion 841 and the second limiting portion 33 in the moving direction of the first driving member 81 not intersect. When the first driving member 81 moves from the locking state to the unlocking state, the second limiting portion 33 and the first limiting portion 841 cooperate to drive the first elastic portion 84 to elastically deform, so that the first limiting portion 841 moves from one side of the second limiting portion 33 to the other side. When the first driving member 81 is in the unlocking state and is restricted by the first limiting portion 841 and the second limiting portion 33 from moving to the locking state, and the first connecting rod 1 rotates from the state that the third axis and the second axis do not coincide to the state that the third axis and the second axis coincide, the first elastic portion 84 is deformed by the first unlocking structure on the handrail box to make the projections of the first limiting portion 841 and the second limiting portion 33 in the moving direction of the first driving member 81 not intersect, thereby releasing the restriction of the first limiting portion 841 and the second limiting portion 33 on the movement of the first driving member 81.

[0086] Referring to Figure 7As shown, specifically, the first elastic part 84 is arranged to extend along the moving direction of the first driving member 81, one end of the first elastic part 84 is fixed to the first driving member 81, and the other end is deformable towards the direction of approaching or moving away from the plane of the substrate 3, the first limiting part 841 is arranged on the side of the first elastic part 84 close to the substrate 3, and the second limiting part 33 is arranged on the side of the substrate 3 close to the first elastic part 84, the side of the first limiting part 841 towards the second driving member 91 and the side of the second limiting part 33 moving away from the second driving member 91 are arranged as inclined surfaces, and the side of the first limiting part 841 moving away from the second driving member 91 and the side of the second limiting part 33 towards the second driving member 91 are arranged as planes perpendicular to the plane of the substrate 3, when the first driving member 81 moves towards the unlocking state, the first limiting part 841 and the second limiting part 33 are relatively movable and the first elastic part 84 is elastically deformed by the cooperation of the inclined surfaces on the first limiting part 841 and the second limiting part 33, so that the first limiting part 841 can move to the other side of the second limiting part 33, and when the first driving member 81 moves towards the locking state, the planes of the first limiting part 841 and the second limiting part 33 abut, thereby limiting the movement of the first driving member 81.

[0087] Referring to Figure 7 As shown, further, a first elastic wire 85 is arranged on the first driving member 81 and arranged along the third axis direction, one end of the first elastic wire 85 is fixed to the first driving member 81, and the other end extends to the side of the first elastic part 84 moving away from the substrate 3, and the first elastic part 84 deforms away from the substrate 3 against the elastic force of the first elastic wire 85, when the first driving member 81 moves to the unlocking state, the first limiting part 841 moves to the side of the second limiting part 33 close to the second driving member 91, at this time, the first elastic part 84 is reset under the action of its own elastic force and the elastic force of the first elastic wire 85, so that the projections of the first limiting part 841 and the second limiting part 33 in the moving direction of the first driving member 81 intersect, thereby ensuring that the first limiting part 841 and the second limiting part 33 can enter the state of limiting the movement of the first driving member 81.

[0088] Referring to Figure 9As shown, further, the first unlocking structure is formed by the armrest box side wall, and a first unlocking column 842 is connected to one end of the first elastic part 84, extends through the base plate 3 to a side of the base plate 3 away from the first elastic part 84, and corresponds to a groove provided on the base plate 3 for the first unlocking column 842 to pass through and move with the first driving member 81. When the armrest cover is rotated to the open state around the first axis, the first driving member 81 is in the unlocked state, and the first limiting part 841 and the second limiting part 33 cooperate to limit the movement of the first driving member 81 to the locked state. During the closing process of the armrest cover, the first unlocking column 842 is abutted against the armrest box side wall, moves away from the armrest box through the armrest box side wall, and moves the first elastic part 84 away from the base plate 3 through the first unlocking column 842, until the projections of the first limiting part 841 and the second limiting part 33 in the movement direction of the first driving member 81 do not intersect, at which time the armrest cover is rotated to a state where the third axis and the second axis are coaxial, the first limiting part 841 and the second limiting part 33 are out of the abutment state, and the first driving member 81 moves to the locked state under the elastic force of the third elastic member 83. The first locking rod 41 is driven to be inserted into the first lock hole 42 to lock the first connecting rod 1, thereby locking the armrest cover.

[0089] Referring to Figure 8 As shown, the second limiting structure includes a second elastic part 94, a third limiting part 941, and a fourth limiting part 34. The second elastic part 94 is connected to the second driving member 91, the third limiting part 941 is provided on the second elastic part 94, and the fourth limiting part 34 is provided on the base plate 3. In the undeformed state of the second elastic part 94, the projections of the third limiting part 941 and the fourth limiting part 34 in the movement direction of the first driving member 81 intersect, and the second elastic part 94 can be elastically deformed until the projections of the third limiting part 941 and the fourth limiting part 34 in the movement direction of the second driving member 91 do not intersect. When the second driving member 91 moves from the locked state to the unlocked state, the fourth limiting part 34 and the third limiting part 941 cooperate to drive the second elastic part 94 to elastically deform, so that the third limiting part 941 moves from one side of the fourth limiting part 34 to the other side. When the first driving member 81 is in the unlocked state and is limited by the third limiting part 941 and the fourth limiting part 34 to move to the locked state, and the second connecting rod 2 rotates from the state where the fourth axis and the first axis are not coaxial to the state where they are coaxial, the second elastic part 94 is deformed by the second unlocking structure on the armrest box until the projections of the third limiting part 941 and the fourth limiting part 34 in the movement direction of the second driving member 91 do not intersect, so as to release the limitation of the third limiting part 941 and the fourth limiting part 34 on the movement of the second driving member 91.

[0090] Referring to Figure 8As shown, specifically, the second elastic part 94 is arranged to extend along the moving direction of the second driving member 91, one end of the second elastic part 94 is fixed to the second driving member 91, and the other end is deformable towards the direction of approaching or moving away from the plane of the substrate 3, the third limiting part 941 is arranged on the side of the second elastic part 94 close to the substrate 3, the fourth limiting part 34 is arranged on the side of the substrate 3 close to the second elastic part 94, the side of the third limiting part 941 towards the first driving member 81 and the side of the fourth limiting part 34 moving away from the first driving member 81 are arranged as inclined surfaces, and the side of the third limiting part 941 moving away from the first driving member 81 and the side of the fourth limiting part 34 towards the first driving member 81 are arranged as planes perpendicular to the plane of the substrate 3. When the second driving member 91 moves towards the unlocking state, the third limiting part 941 and the fourth limiting part 34 are relatively movable and the second elastic part 94 is elastically deformed by the cooperation of the inclined surfaces on the third limiting part 941 and the fourth limiting part 34, so that the third limiting part 941 can move to the other side of the fourth limiting part 34. When the second driving member 91 moves towards the locking state, the planes of the third limiting part 941 and the fourth limiting part 34 abut, thereby limiting the movement of the second driving member 91.

[0091] Referring to Figure 8 As shown, further, a second elastic wire 95 is arranged on the second driving member 91 and arranged along the third axis direction, one end of the second elastic wire 95 is fixed to the second driving member 91, and the other end extends to the side of the second elastic part 94 moving away from the substrate 3. When the second elastic part 94 deforms away from the substrate 3, the elastic force of the second elastic wire 95 is overcome. When the second driving member 91 moves to the unlocking state, the third limiting part 941 moves to the side of the fourth limiting part 34 close to the first driving member 81. At this time, the second elastic part 94 is reset under the elastic force of itself and the elastic force of the second elastic wire 95, so that the projections of the third limiting part 941 and the fourth limiting part 34 in the moving direction of the second driving member 91 intersect, thereby ensuring that the third limiting part 941 and the fourth limiting part 34 can enter the state of limiting the movement of the second driving member 91.

[0092] Further, the second unlocking structure is also formed by the armrest box side wall. One end of the second elastic part 94 is connected with a second unlocking column 942. The second unlocking column 942 extends through the base plate 3 to the side of the base plate 3 away from the second elastic part 94. A groove is arranged on the base plate 3 for the second unlocking column 942 to pass through and move with the second driving member 91. When the armrest cover rotates to the open state around the second axis, the second driving member 91 is in the unlocking state, and the third limiting part 941 and the fourth limiting part 34 cooperate to limit the movement of the second driving member 91 to the locking state. During the closing process of the armrest cover, the second unlocking column 942 is abutted against the armrest box side wall. The second unlocking column 942 is moved away from the armrest box by the armrest box side wall. The second elastic part 94 is moved away from the base plate 3 by the second unlocking column 942. When the projection of the third limiting part 941 and the fourth limiting part 34 in the movement direction of the second driving member 91 does not intersect, the armrest cover is rotated to the state that the third axis and the second axis are coaxial. The third limiting part 941 and the fourth limiting part 34 are in the abutment state. The second driving member 91 moves to the locking state under the elastic force of the fourth elastic part 93. The second locking rod 51 is driven to be inserted into the second lock hole 52 to lock the second connecting rod 2, so as to lock the armrest cover.

[0093] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double linkage mechanism for double-sided opening of a handrail, characterized by, The utility model relates to a kind of armrest cover structure, including: First connecting rod (1) for being connected with armrest box, and it can be rotated to armrest box around first axis parallel to vehicle body X direction; Second connecting rod (2) is spaced apart from the first connecting rod (1) in the vehicle body X direction, and the second connecting rod (2) is used for being connected with armrest box, and it can be rotated to armrest box around second axis parallel to vehicle body X direction, first axis and second axis are spaced apart along the vehicle body Y direction; Base plate (3) for being connected with armrest cover, the base plate (3) is arranged between the first connecting rod (1) and the second connecting rod (2), the base plate (3) is connected with the first connecting rod (1) by first connecting structure, and it is connected with the second connecting rod (2) by second connecting structure, the first connecting structure makes the base plate (3) rotatable to the first connecting rod (1) around third axis parallel to first axis, and the base plate (3) rotates with the first connecting rod (1) around first axis, and the first connecting rod (1) can be rotated to third axis coincides with second axis, the second connecting structure makes the base plate (3) rotatable to the second connecting rod (2) around fourth axis parallel to second axis, and the base plate (3) rotates with the second connecting rod (2) around second axis, and the second connecting rod (2) can be rotated to fourth axis coincides with first axis; Wherein, when third axis does not coincide with second axis, the second connecting structure limits the base plate (3) relative rotation with the first connecting rod (1), when fourth axis does not coincide with first axis, the first connecting structure limits the base plate (3) relative rotation with the second connecting rod (2).

2. Double linkage for the opening of a handrail on both sides, according to claim 1, characterized in that: First locking structure (4) is arranged between the first connecting rod (1) and armrest box, and the first locking structure (4) is used to limit the first connecting rod (1) rotation around first axis when third axis coincides with second axis, and the first locking structure (4) can release the limitation of the first connecting rod (1); Second locking structure (5) is arranged between the second connecting rod (2) and armrest box, and the second locking structure (5) is used to limit the second connecting rod (2) rotation around second axis when fourth axis coincides with first axis, and the second locking structure (5) can release the limitation of the second connecting rod (2).

3. Double linkage for the opening of a handrail on both sides, according to claim 2, characterized in that: First elastic member (6) is arranged between the base plate (3) and the first connecting rod (1), and second elastic member (7) is arranged between the base plate (3) and the second connecting rod (2), when the base plate (3) rotates with the first connecting rod (1) from the state that third axis does not coincide with second axis to coincide state, the base plate (3) overcomes the elastic force of the second elastic member (7), and when the base plate (3) rotates with the second connecting rod (2) from the state that fourth axis does not coincide with first axis to coincide state, the base plate (3) overcomes the elastic force of the first elastic member (6).

4. The double linkage mechanism for double-sided opening of handrails according to claim 2, characterized in that, The first locking structure (4) includes: First lock hole (42) is arranged on armrest box; The first locking rod (41) is coaxial with the third axis and can rotate about its own axis relative to the first connecting rod (1), and the second locking rod (51) is coaxial with the fourth axis and can rotate about its own axis relative to the second connecting rod (2); The first driving assembly (8) and the second driving assembly (9) are arranged on the base plate (3), the first driving assembly (8) is connected with the first locking rod (41) and is used for driving the first locking rod (41) to move along the third axis direction, and the second driving assembly (9) is connected with the second locking rod (51) and is used for driving the second locking rod (51) to move along the fourth axis direction. The first driving assembly (8) comprises: The first driving assembly (8) comprises:

5. Double linkage for the opening of a handrail on both sides, according to claim 4, characterized in that: The second driving assembly (9) comprises: The second driving assembly (9) comprises:

6. Double linkage for the opening of a handrail on both sides, according to claim 5, characterized in that, The first driving assembly (8) comprises: The first driving assembly (8) comprises: The second driving assembly (9) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first 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comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) comprises: The first driving assembly (8) 7. Double linkage for the opening of a handrail on both sides, according to claim 6, characterized in that, The first driving assembly (8) comprises: a third elastic member (83) arranged between the first driving member (81) and the base plate (3), the first driving member (81) moving against the elastic force of the third elastic member (83) from the locked state to the unlocked state; a first limiting structure arranged between the first driving member (81) and the base plate (3), adapted to limit the movement of the first driving member (81) to the locked state when the third axis and the second axis are not coincident and the first driving member (81) is in the unlocked state, and adapted to release the limitation of the first driving member (81) by the first unlocking structure on the armrest box when the first connecting rod (1) rotates from the state that the third axis and the second axis are not coincident to the state that the third axis and the second axis are coincident; The second driving assembly (9) comprises: a fourth elastic member (93) arranged between the second driving member (91) and the base plate (3), the second driving member (91) moving against the elastic force of the fourth elastic member (93) from the locked state to the unlocked state; a second limiting structure arranged between the second driving member (91) and the base plate (3), adapted to limit the movement of the second driving member (91) to the locked state when the fourth axis and the first axis are not coincident and the second driving member (91) is in the unlocked state, and adapted to release the limitation of the second driving member (91) by the second unlocking structure on the armrest box when the second connecting rod (2) rotates from the state that the fourth axis and the first axis are not coincident to the state that the fourth axis and the first axis are coincident.

8. Double linkage for the opening of a handrail on both sides, according to claim 7, characterized in that, The first limiting structure comprises: a first elastic part (84) connected to the first driving member (81); a first limiting part (841) arranged on the first elastic part (84) and a second limiting part (33) arranged on the base plate (3), the projections of the first limiting part (841) and the second limiting part (33) in the moving direction of the first driving member (81) intersect in the undeformed state of the first elastic part (84), the first elastic part (84) can be elastically deformed to the state that the projections of the first limiting part (841) and the second limiting part (33) in the moving direction of the first driving member (81) do not intersect, adapted to drive the first elastic part (84) to elastically deform by the cooperation of the second limiting part (33) and the first limiting part (841) when the first driving member (81) moves from the locked state to the unlocked state, so that the first limiting part (841) moves from one side of the second limiting part (33) to the other side; Wherein, when the first driving member (81) is in the unlocking state and is limited to move to the locking state by the first limiting part (841) and the second limiting part (33), and the first connecting rod (1) rotates from the state that the third axis and the second axis are not coincident to the state that the third axis and the second axis are coincident, the first elastic part (84) is deformed to the state that the projection of the first limiting part (841) and the second limiting part (33) on the moving direction of the first driving member (81) is not intersected by the first unlocking structure on the armrest box, so as to release the limitation of the first limiting part (841) and the second limiting part (33) on the movement of the first driving member (81).

9. Double linkage for double-sided opening of a handrail according to claim 5, characterized in that: The third locking rod (10) and the fourth locking rod (101) are arranged on the substrate (3) and can move relative to the substrate (3) along the third axis direction, the third locking hole (11) for cooperating with the third locking rod (10) is arranged on the first connecting rod (1), and the fourth locking hole (21) for cooperating with the fourth locking rod (101) is arranged on the second connecting rod (2), so as to limit the rotation of the substrate (3) relative to the first connecting rod (1) by inserting the third locking rod (10) into the third locking hole (11) on the first connecting rod (1) when the substrate (3) rotates with the first connecting rod (1) around the first axis, or limit the rotation of the substrate (3) relative to the second connecting rod (2) by inserting the fourth locking rod (101) into the fourth locking hole (21) when the substrate (3) rotates with the second connecting rod (2) around the second axis.

10. Double linkage for the opening of a handrail on both sides, according to claim 9, characterized in that: The first driving assembly (8) is further used for driving the fourth locking rod (101) to move, the second driving assembly (9) is further used for driving the third locking rod (10) to move, the first driving assembly (8) drives the first locking rod (41) and the fourth locking rod (101) to move at the same time, so that the first locking rod (41) is inserted into the first locking hole (42) and the fourth locking rod (101) is inserted into the fourth locking hole (21), or the first locking rod (41) is separated from the first locking hole (42) and the fourth locking rod (101) is separated from the fourth locking hole (21), and the second driving assembly (9) drives the second locking rod (51) and the third locking rod (10) to move at the same time, so that the second locking rod (51) is inserted into the second locking hole (52) and the third locking rod (10) is inserted into the third locking hole (11), or the second locking rod (51) is separated from the second locking hole (52) and the third locking rod (10) is separated from the third locking hole (11).

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