CN215565230U

CN215565230U - Hinge structure of bidirectional opening and closing cover body and bidirectional opening and closing automobile armrest box

Info

Publication number: CN215565230U
Application number: CN202121339376.7U
Authority: CN
Inventors: 韩宪超; 王彩芳; 张丁; 陈佳
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-18
Anticipated expiration: 2031-06-16

Abstract

The utility model provides a hinge structure of a bidirectional opening and closing cover body and a bidirectional opening and closing automobile armrest box, wherein the hinge structure of the bidirectional opening and closing cover body comprises two connecting rods, two fixing supports, an opening spring and a damping mechanism, one fixing support is connected with the cover body, the other fixing support is connected with a cover body fixing plate, the opening spring and the damping mechanism are respectively arranged between the two fixing supports and the connecting rods, each damping mechanism is provided with a friction plate and a damping plate which rotate relatively, the damping plates are provided with abutting parts, the friction plates are provided with avoiding regions and friction regions, the front sections which rotate relatively are opened between the fixing supports and the connecting rods, and the abutting parts penetrate through the avoiding regions; the fixed support and the connecting rod are relatively opened at the rear section of the rotation, and the abutting part and the friction area are in sliding friction to form speed reduction buffering between the fixed support and the connecting rod. The hinge structure of the bidirectional opening and closing cover body can effectively prevent the cover body from shaking caused by rotation inertia when rotating to the maximum angle.

Description

Hinge structure of bidirectional opening and closing cover body and bidirectional opening and closing automobile armrest box

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a hinge structure of a bidirectional opening and closing cover body. The utility model also relates to an automobile armrest box provided with the hinge structure of the bidirectional opening and closing lock body.

Background

An armrest box for a vehicle is an interior trim accessory for a vehicle installed between main and sub seats, and is provided to allow a driver to place his arms when driving for a long time, thereby allowing the arms to be effectively rested. Meanwhile, in order to meet certain storage requirements, a storage box is arranged in the armrest box. In order to ensure the convenience of opening the storage box, the opening mode of the armrest box cover is usually front-back turnover and left-right turnover, and in order to ensure that a main driver and an auxiliary driver are convenient to open, the armrest box is turned left and right to open and close in a bidirectional mode, so that the armrest box is widely applied due to the advantages of convenience in operation, strong functionality and the like.

However, in the existing vehicle model, no buffer or damper device is provided in the armrest box adopting the left-right turning bidirectional opening and closing mode. When the armrest box cover is opened, the torsion spring is opened to release, and the force applied to the armrest box cover is used for overcoming the self gravity of the armrest box cover to open the armrest box cover. In the opening process, the opening acceleration of the armrest box cover is changed continuously, the armrest box cover is opened to the maximum position and can continue to move under the action of inertia, and the armrest box cover is subjected to plastic deformation to obviously shake, so that the finished automobile delicate feeling is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a hinge structure of a bi-directional opening and closing cover, so as to improve the shaking problem caused by the rotation inertia when the cover rotates to the maximum angle.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a hinge structure of two-way open and shut lid, includes connecting rod, fixed bolster, opens spring and damping mechanism, wherein:

the two fixing supports are respectively connected to two ends of the connecting rod through rotating shafts, one fixing support is used for connecting the cover body, and the other fixing support is used for connecting the cover body fixing plate;

the opening springs are respectively arranged between the two fixed brackets and the connecting rod, the opening springs are used for driving the fixed brackets and the connecting rod to form relative opening rotation, and the damping mechanisms are respectively arranged between the two fixed brackets and the connecting rod;

each damping mechanism is provided with a friction plate and a damping plate, the friction plate rotates synchronously with one of the fixed support and the connecting rod, the damping plate rotates synchronously with the other of the fixed support and the connecting rod, the damping plate is provided with a butting part, and the friction plate is provided with an avoiding area and a friction area which are arranged around the rotating shaft;

the front section of the fixed support and the connecting rod which relatively open and rotate, and the abutting part penetrates through the avoiding area; the fixed support and the connecting rod relatively open the rear section of rotation, the abutting part and the friction area slide and rub to form a deceleration buffer between the fixed support and the connecting rod.

Furthermore, the opening spring adopts a torsion spring sleeved on the rotating shaft; and two ends of the torsion spring are respectively abutted against the fixed support and the connecting rod.

Furthermore, an accommodating cavity is formed in the fixed support, and the rotating shaft penetrates through the accommodating cavity; at least part of the opening spring is accommodated in the accommodating cavity.

Further, the rotating shaft and the fixed support rotate synchronously; the friction plate is arranged on the rotating shaft and rotates synchronously with the rotating shaft; the damping sheet is sleeved on the rotating shaft and synchronously rotates with the connecting rod, and the damping sheet is clamped between the friction sheet and the connecting rod through fastening of a fastening piece positioned on the rotating shaft.

Furthermore, an anti-rotation mechanism is arranged between the rotating shaft and the fixed support; a clamping mechanism is arranged between the damping fin and the connecting rod; the rotating shaft and the fixed bracket synchronously rotate through the anti-rotation mechanism; the damping fin passes through clamping mechanism with synchronous rotation between the connecting rod.

Furthermore, the anti-rotation mechanism comprises an anti-rotation positioning rib arranged on the rotating shaft and an anti-rotation positioning groove arranged on the fixed support; the clamping mechanism comprises a clamping block arranged on the damping sheet and a clamping groove arranged on the connecting rod.

Further, the friction plate is integrally formed at one end of the rotating shaft; the fastener is connected to the other end of the rotating shaft.

Furthermore, an accommodating groove is formed in the connecting rod; the damping piece and the friction piece are located in the accommodating groove.

Furthermore, a cushion pad is arranged between the damping sheet and the connecting rod; the buffer pad is sleeved on the rotating shaft.

Compared with the prior art, the utility model has the following advantages:

according to the hinge structure of the bidirectional opening and closing cover body, the opening spring and the damping mechanism are arranged between the fixed support and the connecting rod, so that when the cover body rotates relative to the cover body fixed plate, the friction plate and the damping sheet of the damping mechanism are matched with each other to generate friction force to offset the opening force applied by the opening spring when the cover body is opened, the rotation between the fixed support and the connecting rod is decelerated and buffered, the problem of shaking caused by rotation inertia when the cover body rotates to the maximum angle is effectively prevented, and meanwhile, the hinge structure has a good using effect.

In addition, the opening spring adopts a torsion spring, and has the characteristics of mature technology and wide application. The rotation-preventing mechanism is beneficial to synchronous rotation of the rotating shaft and the fixed support, and the clamping mechanism is beneficial to synchronous rotation of the damping fin and the connecting rod.

In addition, the blotter that sets up can further do benefit to and carry out the buffering of slowing down to the rotation between fixed bolster and the connecting rod, and can further prevent that the lid from rotating the rocking after opening.

Another objective of the present invention is to provide a two-way foldable armrest box for an automobile, wherein the armrest box cover in the armrest box is disposed on the armrest box body through the hinge structure of the two-way foldable cover body; the handrail box cover forms the cover body, and the cover body fixing plate is positioned on the handrail box body.

Compared with the prior art, the hinge structure of the automobile armrest box capable of being opened and closed in two directions and the cover body capable of being opened and closed in two directions has the same beneficial effects, and the detailed description is omitted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a hinge structure of a bi-directional opening and closing cover according to a first embodiment of the present invention;

fig. 2 is an exploded view of the hinge structure of the bi-directional openable cover according to the first embodiment of the present invention;

fig. 3 is a structural schematic view illustrating an assembled state of a hinge structure of a bi-directional opening and closing cover according to a first embodiment of the present invention;

FIG. 4 is an exploded view of the hinge structure of the bi-directional openable cover according to the first embodiment of the present invention;

FIG. 5 is a sectional view taken along line A-A of FIG. 3;

FIG. 6 is a schematic structural diagram of a friction plate and a damping plate in a matching state according to a first embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another state of engagement between a friction plate and a damping plate according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a rotating shaft according to a first embodiment of the present invention;

FIG. 9 is a right side view of a spindle according to a first embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a damping fin according to a first embodiment of the present invention;

FIG. 11 is a right side view of a damper according to a first embodiment of the present invention;

description of reference numerals:

1. a connecting rod; 11. accommodating grooves; 12. a clamping groove; 2. a first fixed bracket; 3. a second fixed bracket; 4. opening the spring; 5. a rotating shaft; 51. a friction plate; 511. an avoidance zone; 512. a friction zone; 52. anti-rotation positioning ribs; 6. a damping fin; 61. an abutting portion; 62. a clamping block; 7. a cushion pad; 8. a fastener; 9. unlocking the shaft lever; 10. a cover body; 20. lid fixed plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment relates to a hinge structure of a bidirectional opening and closing cover body, which mainly comprises a connecting rod 1, a fixed support, an opening spring 4 and a damping mechanism. The two fixing supports are arranged at two ends of the connecting rod 1, one fixing support is connected with the cover body 10, the other fixing support is connected with the cover body fixing plate 20, the opening springs 4 and the damping mechanisms are respectively arranged between the two fixing supports and the connecting rod 1, the opening springs 4 are used for driving the fixing supports and the connecting rod 1 to form relative opening rotation, and the damping mechanisms are used for performing speed reduction buffering on rotation between the fixing supports and the connecting rod 1, so that the cover body 10 can be gradually stopped relative to rotation of the cover body fixing plate 20, and shaking caused by opening inertia when the cover body 10 rotates to the maximum opening angle can be effectively prevented.

Based on the above design concept, an exemplary structure of the hinge structure of the bidirectional opening and closing cover body of the present embodiment is shown in fig. 1 to 5, and the two fixing brackets are respectively connected to two ends of the connecting rod 1 through the rotating shaft 5, that is, the first fixing bracket 2 and the second fixing bracket 3 shown in fig. 3 and 4, wherein the first fixing bracket 2 is used for connecting the cover body 10, and the second fixing bracket 3 is used for connecting the cover body fixing plate 20.

In this embodiment, an opening spring 4 and a damping mechanism are respectively disposed between the two fixing brackets and the connecting rod 1, that is, the opening spring 4 and the damping mechanism are disposed between the first fixing bracket 2 and the connecting rod 1, and between the second fixing bracket 3 and the connecting rod 1. Each damping mechanism has a friction plate 51 and a damping plate 6, the friction plate 51 rotates synchronously with one of the fixed bracket and the connecting rod 1, the damping plate 6 rotates synchronously with the other of the fixed bracket and the connecting rod 1, the damping plate 6 is provided with an abutting portion 61, and the friction plate 51 is provided with an avoidance region 511 and a friction region 512 which are arranged around the rotating shaft 5.

With the above structure, the above-described abutting portion 61 passes through the escape area 511 at the front stage of the relative opening rotation between the fixed bracket and the link 1. And at the rear stage of the relative opening rotation between the fixed bracket and the connecting rod 1, the abutting part 61 is in sliding friction with the friction area 512, thereby forming a deceleration buffer between the fixed bracket and the connecting rod 1.

It should be noted that the opening spring 4 and the damping mechanism disposed between the two fixing brackets and the connecting rod 1 are identical in structure, except that the specific structure of the two fixing brackets is slightly different, that is, different structures are correspondingly disposed on the first fixing bracket 2 and the second fixing bracket 3 for facilitating the connection with the cover 10 or the cover fixing plate 20. In addition, it should be noted that the hinge structure of the bidirectional opening and closing cover body of the present embodiment is preferably applied to a bidirectional opening and closing lock body mechanism, which can be referred to as a related structure in the prior art.

For the sake of understanding of the damping mechanism of the present embodiment, the present embodiment will be described in detail with the damping mechanism between the first fixing bracket 2 and the link 1 in detail.

First, as shown in fig. 1 to 5, the rotating shaft 5 and the first fixing frame 2 of the present embodiment rotate synchronously, and in order to facilitate the synchronous rotation of the rotating shaft 5 and the first fixing frame 2, in the present embodiment, an anti-rotation mechanism is disposed between the rotating shaft 5 and the first fixing frame 2, and the rotating shaft 5 rotates synchronously with the first fixing frame 2 through the anti-rotation mechanism. In a specific structure, as shown in fig. 6 to 8, the anti-rotation mechanism includes an anti-rotation positioning rib 52 disposed on the rotating shaft 5 and an anti-rotation positioning groove disposed on the first fixing bracket 2 and not shown in the figure, and when the rotating shaft 5 is mounted on the first fixing bracket 2, the anti-rotation positioning rib 52 is embedded in the anti-rotation positioning groove, so that the rotating shaft 5 is fixed on the first fixing bracket 2, and the synchronous rotation with the first fixing bracket 2 is realized.

It is understood that the anti-rotation mechanism of the present embodiment can adopt other forms besides the above-mentioned structural form, such as the anti-rotation positioning rib 52 provided on the first fixing bracket 2, and correspondingly, the anti-rotation positioning groove is provided on the rotating shaft 5.

Next, the opening spring 4 of the present embodiment preferably adopts a torsion spring sleeved on the rotating shaft 5, and two ends of the torsion spring respectively abut against the first fixing bracket 2 and the connecting rod 1. To facilitate the arrangement of the torsion spring, as shown in fig. 2 in combination with fig. 4 and 5, a receiving cavity is formed in the first fixing bracket 2, the rotating shaft 5 passes through the receiving cavity, and at least a part of the opening spring 4 is received in the receiving cavity.

Again, the damper mechanism of the present embodiment has the friction plate 51 and the damper plate 6, the friction plate 51 rotating in synchronization with one of the first fixed bracket 2 and the connecting rod 1, and the damper plate 6 rotating in synchronization with the other of the first fixed bracket 2 and the connecting rod 1. Preferably, the friction plate 51 of the present embodiment is specifically disposed on the rotating shaft 5 and rotates synchronously with the rotating shaft 5, that is, the friction plate 51 rotates synchronously with the first fixing bracket 2. The damping sheet 6 is sleeved on the rotating shaft 5 and synchronously rotates with the connecting rod 1, and the damping sheet 6 is clamped between the friction plate 51 and the connecting rod 1 by fastening of a fastening piece 8 positioned on the rotating shaft 5.

In order to facilitate the synchronous rotation of the damping fin 6 and the connecting rod 1, in this embodiment, a clamping mechanism is arranged between the damping fin 6 and the connecting rod 1, and the damping fin 6 rotates synchronously with the connecting rod 1 through the clamping mechanism. Specifically, this clamping mechanism is including locating joint piece 62 on damping fin 6 to and locate joint groove 12 on connecting rod 1, connect through the joint of joint piece 62 in joint groove 12, thereby make damping fin 6 be fixed in on connecting rod 1, and then realize damping fin 6 and connecting rod 1's synchronous rotation.

It will be appreciated that the friction plate 51 may also rotate in synchronism with the connecting rod 1, and the damping plate 6 may rotate in synchronism with the first stationary bracket 2. Thus, the friction plate 51 and the damping plate 6 can rotate relatively, so that when the rotating shaft 5 rotates, friction is generated between the damping plate 6 and the friction plate 51 on the rotating shaft 5, so as to counteract the opening force applied to the rotating shaft 5 by the opening spring 4, further to gradually stop the rotation of the cover 10, and to effectively avoid shaking caused by opening inertia.

In addition, be equipped with holding tank 11 on the connecting rod 1 of this embodiment, damping fin 6 and friction disc 51 are located in holding tank 11, so set up, can also play certain guard action to prevent that great particulate matter from going into between friction disc 51 and the damping fin 6, and influence damping mechanism's use.

As one of the preferred embodiments of the present embodiment, the friction plate 51 of the present embodiment is integrally formed at one end of the rotating shaft 5, and the fastening member 8 is connected to the other end of the rotating shaft 5. Specifically, the structure of the rotating shaft 5 of the present embodiment is as shown in fig. 8 and fig. 9, the aforementioned avoidance area 511 and the friction area 512 are configured on one side of the friction plate 51 connected to the rotating shaft 5, and the avoidance area 511 and the friction area 512 are two sets symmetrically disposed on the friction plate 51. In the damper plate 6 of the present embodiment, as shown in fig. 10 and 11, the abutting portion 61 is formed on the side of the damper plate 6 abutting against the friction plate 51, and preferably, the abutting portion 61 protrudes outward from the side of the damper plate, and the distance from the side surface of the damper plate is preferably 0.3 mm.

It should be noted that, in addition to the above structure, the friction plate 51 may be fixedly connected to the rotating shaft 5 by riveting or welding. While the fastener 8 of the present embodiment is preferably a fastening nut.

In this embodiment, the front section of the relative opening rotation between the first fixing bracket 2 and the connecting rod 1, and the abutting portion 61 passes through the avoiding region 511. The front section is specifically an angle α shown in fig. 9, which is preferably 70 °, and in the state shown in fig. 6, the abutting portion 61 is located in the range of the escape zone 511, in this case, the friction plate 51 and the damping plate 6 are in clearance fit, and the distance t1 between the two is preferably 0.2 mm. In this way, the abutting portion 61 can be made to smoothly pass through the escape area 511, thereby facilitating the relative rotation between the first fixing bracket 2 and the link 1.

And the abutting part 61 and the friction area 512 are in sliding friction at the rear section of the relative opening rotation between the first fixing bracket 2 and the connecting rod 1. This latter section refers in particular to the one shown in fig. 9, after rotation to an angle α, i.e. after rotation to 70 °. Here, in conjunction with the state shown in fig. 7, the abutting portion 61 is within the range of the friction region 512, and at this time, an interference fit is preferably adopted between the friction plate 51 and the damper plate 6, and more preferably, an interference t2 between the friction plate 51 and the damper plate 6 is preferably 0.2 mm. In this region, a frictional force is generated between the friction plate 51 and the damping plate 6 in a direction opposite to the opening force of the opening spring 4, whereby the rotation between the first fixing bracket 2 and the link 1 is decelerated and buffered to smoothly stop the cover 10.

Here, it can be understood that, at the rear section of the relative opening rotation between the first fixing bracket 2 and the connecting rod 1, the friction plate 51 and the damping plate 6 may be in transition fit, or the friction plate 51 and the damping plate 6 may be in abutting fit, besides adopting interference fit, so that friction force may also be generated between the friction plate 51 and the damping plate 6, but the friction resistance effect is slightly inferior to that of the above interference fit.

It should be noted that the friction plate 51, the rotating shaft 5 and the damping plate 6 of the present embodiment are made of the same material, preferably 45# steel, so that the friction plate 51 and the damping plate 6 have sufficient strength and wear resistance.

As a further improvement of this embodiment, in this embodiment, a buffer 7 is disposed between the damping fin 6 and the link 1, specifically, the buffer 7 is sleeved on the rotating shaft 5 and is located between the damping fin 6 and the first fixing bracket 2, and the buffer 7 is preferably made of POM polyoxymethylene, so that the buffer 7 has good elasticity and wear resistance.

In addition, in this embodiment, an unlocking shaft rod is inserted into the rotating shaft 5, the connecting rod 1 and the first fixing support 2, the unlocking shaft rod 9 is a long and thin rod as a whole, one end of the unlocking shaft rod is bent into an L shape and sequentially passes through the fasteners and the through holes formed in the first fixing support 2, the connecting rod 1 and the rotating shaft 5, the unlocking shaft rod 9 is used for being connected with a lock body, for example, a lock body mechanism arranged in the armrest box, and the axial movement of the unlocking shaft rod 9 in the through holes can enable one end of the unlocking shaft rod 9 to be inserted into or removed from the groove on the cover fixing plate 20.

The hinge structure of the bidirectional opening and closing cover body in the embodiment not only enables the cover body 10 to smoothly rotate, but also can perform speed reduction buffering on rotation between the fixed support and the connecting rod 1, so that shaking caused by rotation inertia when the cover body 10 rotates to the maximum angle can be effectively prevented, and a better using effect is achieved.

Example two

The present embodiment relates to a two-way opening and closing armrest box, in which an armrest box cover is disposed on an armrest box body through a hinge structure of a two-way opening and closing cover according to the first embodiment, wherein the armrest box cover forms the cover 10, and a cover fixing plate 20 is disposed on the armrest box body.

The automobile armrest box capable of being opened and closed in the two directions of the embodiment can enable the armrest box to be decelerated and buffered through the damping mechanism when the armrest box is opened to the maximum angle through the hinge structure of the two-way opening and closing cover body of the embodiment, effectively prevents the armrest box cover from shaking due to the fact that inertia is opened when the maximum angle is opened, and has good practicability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a hinge structure of two-way lid that opens and shuts, its characterized in that includes connecting rod (1), fixed bolster, opens spring (4) and damping mechanism, wherein:

the two fixing supports are respectively connected to two ends of the connecting rod (1) through rotating shafts (5), one fixing support is used for connecting the cover body (10), and the other fixing support is used for connecting the cover body fixing plate (20);

the opening springs (4) are respectively arranged between the two fixed brackets and the connecting rod (1), the opening springs (4) are used for driving the fixed brackets and the connecting rod (1) to form relative opening rotation, and the damping mechanisms are respectively arranged between the two fixed brackets and the connecting rod (1);

each damping mechanism is provided with a friction plate (51) and a damping plate (6), the friction plate (51) rotates synchronously with one of the fixed support and the connecting rod (1), the damping plate (6) rotates synchronously with the other of the fixed support and the connecting rod (1), an abutting part (61) is arranged on the damping plate (6), and an avoidance area (511) and a friction area (512) which are arranged around the rotating shaft (5) are arranged on the friction plate (51);

a front section of relative opening rotation between the fixed bracket and the connecting rod (1), wherein the abutting part (61) penetrates through the avoidance area (511); the rear section of the relative opening rotation between the fixed support and the connecting rod (1) has sliding friction between the abutting part (61) and the friction area (512), so that the speed reduction buffer between the fixed support and the connecting rod (1) is formed.

2. The hinge structure of a bidirectional opening and closing cover according to claim 1, wherein:

the opening spring (4) is a torsion spring sleeved on the rotating shaft (5);

and two ends of the torsion spring are respectively abutted against the fixed support and the connecting rod (1).

3. The hinge structure of a bidirectional opening and closing cover according to claim 2, wherein:

an accommodating cavity is formed in the fixed support, and the rotating shaft (5) penetrates through the accommodating cavity;

at least part of the opening spring (4) is accommodated in the accommodating cavity.

4. The hinge structure of a bidirectional opening and closing cover according to claim 1, wherein:

the rotating shaft (5) and the fixed support rotate synchronously;

the friction plate (51) is arranged on the rotating shaft (5) and rotates synchronously with the rotating shaft (5);

the damping sheet (6) is sleeved on the rotating shaft (5) and synchronously rotates with the connecting rod (1), and the damping sheet (6) is clamped between the friction sheet (51) and the connecting rod (1) through fastening of a fastening piece (8) on the rotating shaft (5).

5. The hinge structure of a bidirectional opening and closing cover according to claim 4, wherein:

an anti-rotation mechanism is arranged between the rotating shaft (5) and the fixed support;

a clamping mechanism is arranged between the damping fin (6) and the connecting rod (1);

the rotating shaft (5) synchronously rotates with the fixed bracket through the anti-rotation mechanism;

the damping fin (6) passes through the clamping mechanism and synchronously rotates between the connecting rods (1).

6. The hinge structure of a bidirectional opening and closing cover according to claim 5, wherein:

the anti-rotation mechanism comprises an anti-rotation positioning rib (52) arranged on the rotating shaft (5) and an anti-rotation positioning groove arranged on the fixed support;

the clamping mechanism comprises a clamping block (62) arranged on the damping fin (6) and a clamping groove (12) arranged on the connecting rod (1).

7. The hinge structure of a bidirectional opening and closing cover according to claim 4, wherein:

the friction plate (51) is integrally formed at one end of the rotating shaft (5);

the fastener (8) is connected to the other end of the rotating shaft (5).

8. The hinge structure of a bidirectional opening and closing cover according to claim 4, wherein:

the connecting rod (1) is provided with an accommodating groove (11);

the damping sheet (6) and the friction sheet (51) are located in the accommodating groove (11).

9. The hinge structure of a bidirectional opening/closing lid body according to any one of claims 4 to 8, wherein:

a cushion pad (7) is arranged between the damping fin (6) and the connecting rod (1);

the buffer pad (7) is sleeved on the rotating shaft (5).

10. The utility model provides a car handrail case that two-way opened and shut which characterized in that:

the armrest box cover in the automobile armrest box is arranged on the armrest box body through the hinge structure of the bidirectional opening and closing cover body in any one of claims 1 to 9;

the handrail box cover forms the cover body (10), and the cover body fixing plate (20) is positioned on the handrail box body.