Hinge mechanism for automatically and synchronously opening and closing door, and cabinet box

Abstract

The present invention relates to the field of hinges. Provided is a hinge mechanism for automatically and synchronously opening and closing a door. The hinge mechanism comprises a driving assembly that rotates synchronously with a cabinet door, a sliding rod connected to the driving assembly, and an elastic assembly, wherein the sliding rod and the driving assembly drive each other, a bevel boss that cooperates with the elastic assembly to press the elastic assembly to deform so as to drive the cabinet door to automatically open and close is connected to the sliding rod, and a strong boundary point is formed on the bevel boss. Compared with the prior art, the hinge mechanism provided in the present invention can be applied to the cabinet door and a cabinet body, the cabinet door rotates to drive the sliding rod to move linearly, and the bevel boss on the sliding rod presses the elastic assembly; when the cabinet door is opened or closed to a certain angle, the elastic assembly cooperates with the bevel boss to drive the sliding rod to move, and the sliding rod drives the cabinet door to rotate by means of the driving assembly, thereby realizing automatic and synchronous opening and closing of the cabinet door; and during the process of closing the door, a linear damper is utilized to cooperate with an end portion of the sliding rod, such that the hinge mechanism has the function of slowly closing the cabinet door and reduces noise.

Description

A hinge mechanism and cabinet for automatic synchronous opening and closing of doors. Technical Field

[0001] This invention relates to the field of hinges, and in particular to a hinge mechanism for automatically and synchronously opening and closing doors, as well as a cabinet using the hinge mechanism. Background Technology

[0002] The existing cabinets are hinged together, allowing the doors to be opened as needed. However, this method requires significant effort and time when the doors become heavy or need to be opened and closed simultaneously. Magnetic closure is also typically required to ensure a complete seal. Furthermore, the lack of a buffer mechanism during opening and closing results in loud impact noise, impacting the cabinet's lifespan and negatively affecting the user experience. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a hinge mechanism for automatic synchronous opening and closing of doors, which is applied to cabinet doors and cabinet bodies. When the cabinet door is opened or closed to a certain angle, it can automatically open or close, thus making opening and closing the door effortless, simple, and convenient.

[0004] The technical solution adopted in this invention is as follows:

[0005] A hinge mechanism for automatic synchronous opening and closing of a cabinet door includes a drive assembly that rotates synchronously with the cabinet door, a sliding rod connected to the drive assembly, and an elastic assembly. The sliding rod and the drive assembly drive each other. The sliding rod is connected to an inclined boss that cooperates with the elastic assembly to compress the elastic assembly and cause it to deform, thereby driving the cabinet door to open and close automatically. A force dividing point is formed on the inclined boss. The drive assembly drives the sliding rod to move until the elastic assembly is at the force dividing point. When the elastic assembly crosses the force dividing point, the elastic assembly and the inclined boss cooperate to drive the sliding rod to move, and the sliding rod drives the drive assembly to rotate.

[0006] Preferably, the elastic component includes an elastic reset member, one end of which is provided with a movable seat for pressing the elastic reset member, and a roller that rolls along the inclined boss is mounted on the movable seat via a pin.

[0007] More preferably, a first inclined side is formed on one side of the force dividing point on the inclined boss, a second inclined side is formed on the other side of the force dividing point on the inclined boss, and a boss arc surface connecting the first and second inclined sides is formed at the top of the boss arc surface, with the force dividing point located at the very top of the boss arc surface.

[0008] More preferably, the second inclined side is connected to a connecting surface.

[0009] More preferably, the drive assembly includes a drive gear that rotates synchronously with the cabinet door, the drive gear meshing with a gear transmission assembly, and a rack connected to the sliding rod, the gear transmission assembly meshing with the rack on the sliding rod.

[0010] More preferably, the rack and the inclined boss are respectively disposed on both sides of the sliding rod.

[0011] Preferably, the end of the sliding rod is further fitted with a linear damper, the cylinder of the linear damper is fitted with a piston rod, the end of the piston rod is provided with a first wedge-shaped surface, and the end of the sliding rod is provided with a second wedge-shaped surface that mates with the first wedge-shaped surface.

[0012] More preferably, the piston rod is provided with a movable head at its end, a first wedge-shaped surface is provided on one side of the movable head, and the top of the movable head forms a pressing plane that presses on the sliding rod.

[0013] More preferably, the drive assembly, elastic assembly and linear damper are all installed in the mounting box, which is provided with a slide for the sliding seat to slide.

[0014] The present invention also provides a cabinet using a hinge mechanism, including a cabinet body, two cabinet doors mounted on the cabinet body via a pivot, two hinge mechanisms mounted on the top of the cabinet body, the drive components in the two hinge mechanisms rotating synchronously with the corresponding cabinet doors, a connector provided between the two hinge mechanisms, a connecting gear set provided in the connector, the connecting gear set meshing with two connecting racks simultaneously, and the two connecting racks being connected to sliding rods in the two hinge mechanisms via connecting rods.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a hinge mechanism for automatic synchronous opening and closing of doors, which can be applied to cabinet doors and cabinet bodies. The rotation of the cabinet door drives the sliding rod to move linearly. The inclined boss on the sliding rod compresses the elastic component. When the cabinet door is opened or closed to a certain angle, the elastic component, in conjunction with the inclined boss, drives the sliding rod to move. The sliding rod drives the cabinet door to rotate through the drive component, realizing the automatic synchronous opening and closing of the cabinet door. During the closing process, a linear damper is used in conjunction with the end of the sliding rod, which has a built-in slow closing function for the cabinet door, reducing noise. Attached Figure Description

[0016] Figure 1 is a schematic diagram of a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention;

[0017] Figure 2 is an exploded view of a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention.

[0018] Figure 3 is a schematic diagram of the sliding rod in a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention;

[0019] Figure 4 is a schematic diagram of the movement of the sliding rod in a hinge mechanism for automatic synchronous door opening and closing provided by the present invention.

[0020] Figure 5 is a schematic diagram of the movement of the sliding rod in a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention.

[0021] Figure 6 is a schematic diagram of the movement of the sliding rod in a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention.

[0022] Figure 7 is a schematic diagram of the movement of the sliding rod in a hinge mechanism for automatic synchronous door opening and closing provided by the present invention.

[0023] Figure 8 is a schematic diagram of the movement of the sliding rod in a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention.

[0024] Figure 9 is a schematic diagram of a cabinet box using a hinge mechanism provided by the present invention;

[0025] Figure 10 is an exploded view of a connector in a cabinet using a hinge mechanism provided by the present invention. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027] Figures 1 to 8 illustrate a preferred embodiment of a hinge mechanism for automatic synchronous opening and closing of a door provided by the present invention. As shown in Figures 1 to 8, the hinge mechanism for automatic synchronous opening and closing of a door includes a drive assembly 10 that rotates synchronously with the cabinet door 100, a sliding rod 20 connected to the drive assembly, and an elastic assembly 30. The sliding rod 20 and the drive assembly 10 drive each other. The sliding rod 20 is connected to a sloping boss 40 that cooperates with the elastic assembly 30 to compress the elastic assembly and deform it to drive the cabinet door to open and close automatically. A force dividing point is formed on the sloping boss 40. When the drive assembly 10 drives the sliding rod 20 to move until the elastic assembly 30 is at the force dividing point, when the elastic assembly 30 crosses the force dividing point, the elastic assembly 30 and the sloping boss 40 cooperate... The sliding rod 20 moves, and the sliding rod 20 drives the drive assembly 10 to rotate. This hinge mechanism is applied to the cabinet door 100 and the cabinet body 200, and can be used for cabinet doors weighing 15~30Kg. The rotation of the cabinet door 100 drives the sliding rod 20 to move linearly. The inclined boss 40 on the sliding rod 20 presses the elastic component 30 until the elastic component is at the force boundary point. When the cabinet door is opened to a certain angle, the elastic component crosses the force boundary point. The elastic component 30 and the inclined boss 40 cooperate to drive the sliding rod 20 to move. The sliding rod 20 drives the cabinet door 100 to rotate through the drive assembly 10, realizing automatic opening and closing of the cabinet door, saving effort when opening and closing the door.

[0028] As shown in Figure 2, the elastic component 30 includes an elastic reset member 31. One end of the elastic reset member 31 is provided with a movable seat 32 for pressing the elastic reset member 31. The movable seat 32 presses against the inclined boss 40. The sliding rod 20 drives the inclined boss 40 to move, and the movable seat 32 moves along the inclined boss 40, thus pressing the elastic reset member 31. To reduce wear and friction, a roller 33 is mounted on the movable seat 32 via a pin, which rolls along the inclined boss 40. The roller 33 moves along the inclined boss 40, causing the movable seat 32 to press against the elastic reset member 31. The elastic reset member 31 is a spring.

[0029] As shown in Figure 3, the inclined boss 40 is similar to a triangular body. A first inclined side 41 is formed on one side of the force demarcation point on the inclined boss, and a second inclined side 42 is formed on the other side. A boss arc surface 43 is formed at the top of the inclined boss, connecting the first and second inclined sides. The force demarcation point is located at the very top of the boss arc surface 43. When the cabinet door is closed, the movable seat 32 is located on the other side of the inclined boss 40. When the door is opened, the drive assembly 10, which rotates synchronously with the cabinet door 100, drives the sliding rod 20 to move outward, and the inclined boss 40 moves synchronously. When the cabinet door 100 rotates to a preset angle, the roller 33 on the movable seat 32 rolls upward along the second inclined side 42, and the movable seat 32 exerts pressure on the elastic reset member 31. When the cabinet door 100 rotates to a preset angle, the roller 33 on the movable seat 32 rolls to the highest point of the boss arc surface 43, that is, the roller 33 on the movable seat 32 rolls to the force dividing point, at which time the pressure on the elastic reset member 31 reaches its maximum. After the roller 33 passes the highest point of the boss arc surface 43 (force dividing point), the roller 33 rolls downward along the first inclined side 41, and the elastic reset member 31 gradually resets, pressing against the inclined boss 40. The sliding rod 20 applies an outward pushing force, and the sliding rod 20 drives the cabinet door 100 to rotate outward through the drive assembly 10 until the roller 33 rolls to the bottom of the first inclined side 41 and presses against the sliding rod 20. At this time, the opening angle of the cabinet door 100 reaches its maximum. When closing the door, the drive assembly 10, which rotates synchronously with the cabinet door 100, drives the sliding rod 20 to move inward, the inclined boss 40 moves synchronously, the roller 33 rolls upward along the first inclined side 41, and the movable seat 32 squeezes the elastic reset member 31. When the cabinet door 100 rotates to the preset angle, the movable seat 32... Roller 33 on plate 2 rolls to the highest point of the protrusion arc surface 43, at which point the pressure on the elastic reset member 31 reaches its maximum. After roller 33 passes the highest point of the protrusion arc surface 43, roller 33 slides downward along the second inclined side surface 42, and the elastic reset member 32 gradually resets, applying an inward pushing force to the inclined protrusion 40 and sliding rod 20. The sliding rod 20 drives the cabinet door 100 to rotate and close through the drive assembly 10, until roller 33 rolls to the bottom of the second inclined side surface 42 and presses against the sliding rod 20. At this point, the cabinet door 100 and the cabinet body 200 are completely closed. It should be noted that the opening angle of the cabinet door and the opening angle of the cabinet door when roller 33 rolls to the highest point of the protrusion arc surface 43 can be preset as needed.

[0030] The second inclined side 42 is connected to the connecting surface 44. That is, the slope lengths of the inclined surfaces on both sides of the inclined boss 40 are not consistent. When closing the door, when the roller 33 rolls to the bottom of the second inclined side 42, the cabinet door 100 can be closed. However, since there is a gap between the cabinet door 100 and the cabinet body 200 during installation, after the roller 33 rolls to the bottom of the second inclined side 42, it continues to roll down to the connecting surface 44. It continues to drive the cabinet door 100 to close through the sliding rod 20 and the drive assembly 10, pressing the cabinet door 100 tightly against the cabinet body 200. That is, a negative angle is formed between the cabinet door 100 and the cabinet body 200, avoiding gaps between the cabinet door 100 and the cabinet body 200.

[0031] As shown in Figure 2, the drive assembly 10 includes a drive gear 11 that rotates synchronously with the cabinet door. The drive gear 11 meshes with a gear transmission assembly 12. The sliding rod 20 is connected to a rack 21. The gear transmission assembly 12 meshes with the rack 21 on the sliding rod 20. When the cabinet door rotates, the drive gear 11 rotates synchronously, and the gear transmission assembly 12 meshes with the rack 21 on the sliding rod 20, thus driving the sliding rod 20 to move linearly. When the sliding rod 20 is displaced by the inclined boss and the elastic assembly 30, the gear transmission assembly 12 meshes with the rack 21 on the sliding rod 20, which can drive the drive gear 11 to rotate in the opposite direction, thereby driving the cabinet door 100 to rotate, providing assistance for the opening and closing of the cabinet door 100.

[0032] The rack 21 and the inclined boss 40 are respectively disposed on both sides of the sliding rod 20, so that the sliding rod 20 rotates synchronously with the rack 21 and the inclined boss 40. The inclined boss 40 is installed on the side of the sliding rod 20, and the bottom of the first inclined side 41 and the second inclined side 42 of the inclined boss 40 smoothly transitions with the side of the sliding rod 20. As shown in Figures 4 to 8, the rack 21 and the inclined boss 40 are respectively disposed on the lower side and the upper side of the sliding rod 20. Correspondingly, the drive assembly 10 and the elastic assembly 30 are respectively located on the lower side and the upper side of the sliding rod 20.

[0033] The sliding rod 20 is also equipped with a linear damper 50 at its end. The linear damper 50 is set inside a plastic sleeve. The cylinder 51 of the linear damper 50 is equipped with a piston rod 52. The cylinder 51 contains a damping medium and a return spring. The end of the piston rod 52 is provided with a first wedge-shaped surface 531. The end of the sliding rod 20 is provided with a second wedge-shaped surface 201 that cooperates with the first wedge-shaped surface 531. During the opening of the cabinet door 100, the linear damper 50 provides a certain assistance for the sliding rod 20 to move outward, making the opening of the door easier. When the cabinet door 100 is closed, the sliding rod 20 moves inward to play a buffering role, so that the cabinet door has a slow closing function and reduces noise.

[0034] The linear damper 50 is installed on one side of the elastic component 30. A movable head 53 is installed at the end of the piston rod 52. A first wedge-shaped surface 531 is provided on one side of the movable head 53. The top of the movable head 53 forms a pressing surface 532 that presses against the sliding rod. Before opening the door, the pressing surface 532 of the movable head 53 on the piston rod 52 presses against the sliding rod 20, maximizing the compression of the damping medium within the cylinder 51 by the piston rod 52. When opening the door, the sliding rod 20 moves linearly outward under the action of the drive component 10. After the cabinet door rotates to a certain angle, the sliding rod 20... After moving a certain distance, the first wedge-shaped surface 531 on the movable head 53 engages with the second wedge-shaped surface 201 of the sliding rod 20. Under the action of the damping medium and the return spring within the cylinder 51, the piston rod 52 extends outward, providing some assistance for the outward linear movement of the sliding rod 20. As the sliding rod 20 continues to move outward linearly, the roller 33 of the elastic component 30 rolls upward along the second inclined side 42 to the highest point of the boss arc surface 43. At this point, the first wedge-shaped surface 531 on the movable head 53 is about to separate from the second wedge-shaped surface 201 of the sliding rod 20, and the piston rod 52 reaches its maximum outward extension length. When the linear damper 50 returns to its maximum position, the elastic reset member 31 inside the elastic component 30 is compressed to its maximum position; the sliding rod 20 continues to move outward, and the cabinet door 100 continues to open. The linear damper 50 does not provide assistance for the movement of the sliding rod 20 or the rotation of the cabinet door 100. When closing the door, as the cabinet door closes, it drives the sliding rod 20 to move inward. The roller 33 of the elastic component 30 rolls upward along the first inclined side 41 to the highest point of the boss arc surface 43. When it rolls towards the second inclined side 42, the first wedge-shaped surface 531 on the moving head 53 and the sliding rod... The second wedge surface 201 of the sliding rod 20 begins to engage, and the end of the sliding rod 20 pushes the piston rod 52 connected to the movable head 53 to move into the cylinder 51, compressing the damping medium inside the cylinder 51 until the first wedge surface 531 on the movable head 53 separates from the second wedge surface 201. The pressing surface 532 on the movable head 53 presses on the sliding rod 20, and the damping medium inside the cylinder 51 is compressed to the maximum extent by the piston rod 52. The sliding rod 20 continues to move inward, and the cabinet door 100 continues to close. The pressing surface 532 on the movable head 53 remains pressing on the side of the sliding rod 20.

[0035] As shown in Figure 2, the drive assembly 10 and the elastic assembly 30 are installed inside the mounting box 60, which has a slide rail 61 for the sliding seat 20 to slide. The mounting box 60 includes a box body 601 and a cover 602. The slide rail 61 divides the inner cavity of the box body 601 into an upper cavity and a lower cavity. The elastic assembly 30 and the linear damper 50 are located in the upper cavity, with the linear damper 50 on one side of the elastic assembly 30. The drive assembly 10 is located in the lower cavity. The box body 601 also has a limiting groove 63 for limiting the movement of the movable head 53 and the roller 33 on the movable seat 32. The box body 601 and the cover 602 are installed with screws. The box body 601 is installed on the top of the cabinet 200, and the shaft of the drive gear 11 passes through the box body 601 and connects to the cabinet door 100.

[0036] As shown in Figures 4 to 8, in a preferred embodiment, the gear transmission assembly 12 includes two meshing driven gears 121. One driven gear 121 meshes with the drive gear 11, and the other driven gear 121 meshes with the rack 21 on the sliding seat 20. The maximum opening angle of the cabinet door is preset to 90 degrees. When the linear damper 50 returns to its maximum position, the opening angle of the cabinet door 100 is 45 degrees. When the opening angle of the cabinet door is 45 degrees, the roller 33 of the elastic component 30 is at the highest point of the boss arc surface 43. Thus, the opening angle range of the cabinet door 100 is 0-90°. When the closing angle of the cabinet door is less than 45°, the cabinet door 100 automatically closes, and when the opening angle of the cabinet door 100 is greater than 45°, the cabinet door 100 automatically opens. The cabinet door 100 also has a slow closing function during the automatic closing process.

[0037] In this embodiment, the door opening process is as follows: As shown in Figure 4, when the cabinet door is closed, the pressing surface 532 on the movable head 53 inside the linear damper 50 presses against the sliding rod 20, and the roller 33 of the elastic component 30 is at the bottom of the connecting surface 44 connected to the second inclined side 42; during the door opening process, the cabinet door 100 rotates, driving the drive gear 11 to drive the sliding rod 20 with rack 21 to move through two meshing driven gears 121, and the roller 33 on the movable seat 32 rolls upward along the second inclined side 42, and the movable seat 32 produces elastic reset member 31. As shown in Figure 5, when the cabinet door rotates to 30 degrees, the second wedge-shaped surface 201 at the end of the sliding rod 20 begins to engage with the first wedge-shaped surface 531 on the movable head 53. The piston rod 52 extends outward under the action of the damping medium and the return spring in the cylinder 51, providing a certain assistance for the outward linear movement of the sliding rod 20. As shown in Figure 6, when the cabinet door rotates to 45 degrees, the roller 33 on the movable seat 32 rolls along the second inclined side 42 to the highest point (force dividing point) of the boss arc surface 43. At this time, the compression on the elastic return member 31 reaches its maximum, and the piston... When the rod 52 extends outward to its maximum length, the linear damper 50 returns to its maximum position. As shown in Figure 7, as the cabinet door continues to rotate, the roller 33 on the movable seat 32 passes the highest point (force dividing point) of the boss arc surface 43 and rolls downward along the first inclined side surface 41. The elastic reset member 31 gradually resets, applying an outward pushing force to the inclined boss 40 and the sliding rod 20. The sliding rod 20 drives the cabinet door 100 to automatically rotate outward through the drive assembly 10 until the roller 33 rolls to the bottom of the first inclined side surface 41 and presses against the sliding rod 20. At this time, the cabinet door 100... The opening angle of the cabinet door 100 reaches its maximum, as shown in Figure 8. The opposite action is the closing process. After the roller 33 rolls to the bottom of the second inclined side 42, it continues to roll down to the connecting surface 44. It continues to drive the cabinet door 100 to close through the sliding rod 20 and the drive assembly 10, pressing the cabinet door 100 tightly against the cabinet body 200. That is, a negative angle is formed between the cabinet door 100 and the cabinet body 200. The second wedge surface 201 at the end of the sliding rod 20 cooperates with the first wedge surface 531 on the moving head 53, so that the cabinet door 100 closes slowly with less noise.

[0038] The hinge provided by this invention has undergone 100,000 tests without damage or breakage, and its function has not been significantly reduced in 50,000 tests. It is highly practical and can be applied to large refrigerators.

[0039] As shown in Figures 9 and 10, this invention also provides a cabinet using a hinge mechanism, including a cabinet body 200. Two cabinet doors 100 are pivotally mounted on the cabinet body 200. Two hinge mechanisms for automatic opening and closing are mounted on the top of the cabinet body. The drive components 10 in the two hinge mechanisms rotate synchronously with their corresponding cabinet doors 100. A connector 70 is provided between the two hinge mechanisms. A connecting gear set 71 is provided within the connector 70. The connecting gear set 71 meshes with two connecting racks 72 simultaneously. The two connecting racks 72 are connected to sliding rods 20 in the two hinge mechanisms via connecting rods 73. The two hinges are symmetrically arranged, allowing the two cabinet doors 100 to open and close synchronously. The sliding seats 20 in the two hinges move in opposite directions and are connected together via the connector 70, enabling synchronous movement of the sliding seats 20 in the two hinges. The hinge mechanisms and connector 70 are relatively small in size. The size of the connecting rod 73 can be customized according to the cabinet body dimensions. The connecting rod 73 is detachable, making installation convenient and saving packaging costs.

[0040] It is worth noting that the hinge mechanism is installed on the top of the cabinet 200 and cannot bear the weight of the cabinet door 100. The weight of the cabinet door 100 can be supported by the pivot seat installed at the bottom of the cabinet door 100 and the cabinet 200.

[0041] In summary, the technical solution of this invention can fully and effectively achieve the above-mentioned objectives. Furthermore, the structure and functional principles of this invention have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this invention, various changes or modifications can be made to the embodiments. Therefore, this invention includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A hinge mechanism for automatically synchronizing the opening of a door, characterized in that, The driving assembly rotates synchronously with the cabinet door, the sliding rod is connected with the driving assembly, and the elastic assembly is connected with the sliding rod.

2. A hinge mechanism for automatically synchronizing a swinging door according to claim 1, characterized in that: The elastic assembly comprises an elastic reset member, one end of the elastic reset member is provided with a movable seat for extruding the elastic reset member, and a roller is installed on the movable seat through a pin shaft and rolls along the inclined boss.

3. A hinge mechanism for automatically synchronizing a swinging door according to claim 2, characterized in that: The first inclined side surface is formed on one side of the force demarcation point of the inclined boss, the second inclined side surface is formed on the other side of the force demarcation point of the inclined boss, the top of the inclined boss is formed with a boss arc surface connecting the first inclined side surface and the second inclined side surface, and the force demarcation point is located at the top of the boss arc surface.

4. A hinge mechanism for automatically synchronizing a swinging door according to claim 3, characterized in that: The second inclined side surface is connected with a connecting surface.

5. The hinge mechanism for automatically synchronizing a swing door according to claim 1, wherein: The driving assembly comprises a driving gear rotating synchronously with the cabinet door, the driving gear is engaged with a gear transmission set, the sliding rod is connected with a rack, and the gear transmission set is engaged with the rack on the sliding rod.

6. A hinge mechanism for automatically synchronizing a swinging door according to claim 5, characterized in that: The rack and the inclined boss are arranged on both sides of the sliding rod.

7. The hinge mechanism for automatically synchronizing a swing door according to claim 1, wherein: The end of the sliding rod is further matched with a linear damper, a cylinder body of the linear damper is matched with a piston rod, an end of the piston rod is provided with a first wedge surface, and an end of the sliding rod is provided with a second wedge surface matched with the first wedge surface.

8. A hinge mechanism for automatically synchronizing a swinging door according to claim 7, characterized in that: The end of the piston rod is installed with a movable head, one side of the movable head is provided with the first wedge surface, and the top of the movable head is formed with a pressing plane pressing on the sliding rod.

9. The hinge mechanism for automatically synchronizing a swing door according to claim 7, wherein: The driving assembly, the elastic assembly and the damper are installed in the mounting box, and the mounting box is provided with a slide way for sliding of the sliding seat. 10.A cabinet box applying the hinge mechanism according to any one of claims 1 to 9, comprising a cabinet body, two cabinet doors are installed on the cabinet body through pivots, two hinge mechanisms are installed on the top of the cabinet body, the driving assemblies in the two hinge mechanisms rotate synchronously with the corresponding cabinet doors respectively, a connector is arranged between the two hinge mechanisms, the connector is provided with a connecting gear set, the connecting gear set is engaged with two connecting racks simultaneously, and the two connecting racks are connected with the sliding rods in the two hinge mechanisms through connecting rods.

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