Hinge mechanism for automatically and synchronously opening and closing door, and cabinet box
The hinge mechanism addresses the effort and noise issues of heavy cabinet doors by using a driving assembly and elastic system for automatic opening and closing, with a linear damper for smooth closure, enhancing usability and durability.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2026-04-08
AI Technical Summary
Existing cabinet doors require significant effort and time to open and close, especially when heavy, and lack a buffering mechanism to reduce impact noise during closure, affecting service life and user experience.
A hinge mechanism with a driving assembly, sliding rod, and elastic assembly that automatically opens and closes cabinet doors by utilizing a force boundary point and an inclined boss to synchronize the movement, incorporating a linear damper for slow-closing and noise reduction.
The mechanism allows for labor-saving, automatic synchronous opening and closing of cabinet doors, reducing effort and noise, with a slow-closing function that prolongs hinge life and enhances user experience.
Smart Images
Figure IMGAF001_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The disclosure relates to the field of hinges, and in particular, to a hinge mechanism for automatic synchronous door opening and closing, and a cabinet using the same.Related Art
[0002] Currently, a cabinet body and cabinet doors are movably mounted by pivot shafts, so that the cabinet doors can be opened at any time as needed. However, when the cabinet doors become heavy and need to be opened and closed simultaneously, more effort and time are required. During closing, magnets are usually needed for adsorption to ensure that the cabinet doors are fully closed. During opening and closing of the existing cabinet doors, due to the lack of a buffering mechanism, the impact noise caused by closing of the doors is significant, which affects the service life of the cabinet doors and results in a poor user experience.SUMMARY
[0003] In view of the above problems, the disclosure provides a hinge mechanism for automatic synchronous door opening and closing, which is applied to a cabinet door and a cabinet body. When opened or closed to a specific angle, the cabinet door can be automatically opened or closed, thereby making it labor-saving, simple, and convenient to open and close the door.
[0004] The technical solution adopted in The disclosure is as follows:
[0005] A hinge mechanism for automatic synchronous door opening and closing, including a driving assembly that rotates synchronously with a cabinet door, a sliding rod connected to the driving assembly, and an elastic assembly, where the sliding rod and the driving assembly drive each other, the sliding rod is connected to an inclined boss that fits with the elastic assembly to extrude the elastic assembly to deform so as to drive the cabinet door to be opened or closed automatically, a force boundary point is formed on the inclined boss, and when the driving assembly drives the sliding rod to move until the elastic assembly is located at the force boundary point, and the elastic assembly crosses the force boundary point, the elastic assembly fits with the inclined boss to drive the sliding rod to move, and the sliding rod drives the driving assembly to rotate.
[0006] Preferably, the elastic assembly includes an elastic reset component, where a movable seat for extruding the elastic reset component is arranged at one end of the elastic reset component, and a roller that rolls along the inclined boss is mounted on the movable seat by a pin shaft.
[0007] Preferably, a first inclined side surface is formed on one side of the force boundary point on the inclined boss, a second inclined side surface is formed on the other side of the force boundary point on the inclined boss, a boss arc surface connected to the first inclined side surface and the second inclined side surface is formed at the top of the inclined boss, and the force boundary point is located at a topmost part of the boss arc surface.
[0008] More preferably, the second inclined side surface is connected to a connecting surface.
[0009] More preferably, the driving assembly includes a driving gear that rotates synchronously with the cabinet door, where the driving gear meshes with a gear transmission set, the sliding rod is connected to a rack, and the gear transmission set meshes with the rack on the sliding rod.
[0010] More preferably, the rack and the inclined boss are arranged on two sides of the sliding rod respectively.
[0011] Preferably, a linear damper is further fitly provided at an end part of the sliding rod, a cylinder of the linear damper is fitly provided with a piston rod, a first wedge surface is arranged at an end part of the piston rod, and a second wedge surface that fits with the first wedge surface is arranged at the end part of the sliding rod.
[0012] More preferably, a movable head is mounted at the end part of the piston rod, the first wedge surface is arranged on one side of the movable head, and a pressing plane that presses against the sliding rod is formed at the top of the movable head.
[0013] More preferably, the driving assembly, the elastic assembly, and the linear damper are all mounted in a mounting box, and a slideway for a sliding rod to slide is arranged in the mounting box.
[0014] The disclosure further provides a cabinet using hinge mechanisms, including a cabinet body, where two cabinet doors are mounted on the cabinet body by pivot shafts, two hinge mechanisms are mounted at the top of the cabinet body, driving assemblies in the two hinge mechanisms rotate synchronously with the corresponding cabinet doors, a connector is arranged between the two hinge mechanisms, a connecting gear set is arranged in the connector, the connecting gear set meshes with two connecting racks at the same time, and the two connecting racks are connected to sliding rods in the two hinge mechanisms by connecting rods respectively.
[0015] Compared with the prior art, the disclosure has the following beneficial effects: the hinge mechanism for automatic synchronous door opening and closing according to the disclosure can be applied to the cabinet door and the cabinet body. The rotation of the cabinet door drives the sliding rod to move linearly, and the inclined boss on the sliding rod extrudes the elastic assembly. When the cabinet door is opened or closed to a specific angle, the elastic assembly fits with the inclined boss to drive the sliding rod to move, and the sliding rod drives the cabinet door to rotate by the driving assembly, thereby achieving the automatic synchronous opening and closing of the cabinet door. During closing of the door, the linear damper is used to fit with the end part of the sliding rod, thereby providing a slow-closing function for the cabinet door, and reducing noise.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a schematic diagram of a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 2 is an exploded view of a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 3 is a schematic diagram of a sliding rod in a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 4 is a first schematic diagram showing the movement of a sliding rod in a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 5 is a second schematic diagram showing the movement of a sliding rod in a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 6 is a third schematic diagram showing the movement of a sliding rod in a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 7 is a fourth schematic diagram showing the movement of a sliding rod in a hinge mechanism for automatic synchronous door opening and closing according to the disclosure; FIG. 8 is a fifth schematic diagram showing the movement of a sliding rod in a hinge mechanism for automatic synchronous door opening and closing according to The disclosure; FIG. 9 is a schematic diagram of a cabinet using hinge mechanisms according to the disclosure; and FIG. 10 is an exploded view of a connector in a cabinet using hinge mechanisms according to the disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The preferred embodiments provided in the disclosure are specifically described with reference to the accompanying drawings.
[0018] FIG. 1 to FIG. 8 show preferred embodiments of a hinge mechanism for automatic synchronous door opening and closing according to the disclosure. As shown in FIG. 1 to FIG. 8, the hinge mechanism for automatic synchronous door opening and closing includes a driving assembly 10 that rotates synchronously with a cabinet door 100, a sliding rod 20 connected to the driving assembly, and an elastic assembly 30, where the sliding rod 20 and the driving assembly 10 drive each other, the sliding rod 20 is connected to an inclined boss 40 that fits with the elastic assembly 30 to extrude the elastic assembly to deform so as to drive the cabinet door to be opened or closed automatically, a force boundary point is formed on the inclined boss 40, and when the driving assembly 10 drives the sliding rod 20 to move until the elastic assembly 30 is located at the force boundary point, and the elastic assembly 30 crosses the force boundary point, the elastic assembly 30 fits with the inclined boss 40 to drive the sliding rod 20 to move, and the sliding rod 20 drives the driving assembly 10 to rotate. The hinge mechanism is applied to the cabinet door 100 and a cabinet body 200, and can be applicable to cabinet doors weighing 15-30 kg. The rotation of the cabinet door 100 drives the sliding rod 20 to move linearly, and the inclined boss 40 on the sliding rod 20 extrudes the elastic assembly 30, until the elastic assembly is located at the force boundary point. After the cabinet door is opened by a specific angle, the elastic assembly 30 crosses the force boundary point and fits with the inclined boss 40 to drive the sliding rod 20 to move, and the sliding rod 20 drives the cabinet door 100 to rotate by the driving assembly 10, so that the cabinet door can be automatically opened or closed, thereby reducing the effort required to open and close the door.
[0019] As shown in FIG. 2, the elastic assembly 30 includes an elastic reset component 31, where a movable seat 32 for extruding the elastic reset component 31 is arranged at one end of the elastic reset component 31 and 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 to extrude the elastic reset component 31. To reduce wear and frictional force, a roller 33 that rolls along the inclined boss is mounted on the movable seat 32 by a pin shaft. The roller 33 moves along the inclined boss 40, causing the movable seat 32 to extrude the elastic reset component 31. The elastic reset component 31 is a spring.
[0020] As shown in FIG. 3, the inclined boss 40 is similar to a triangular body. A first inclined side surface 41 is formed on one side of the force boundary point on the inclined boss, a second inclined side surface 42 is formed on the other side of the force boundary point on the inclined boss, a boss arc surface 43 connected to the first inclined side surface and the second inclined side surface is formed at the top of the inclined boss, and the force boundary point is located at a topmost part 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. During opening of the door, the driving assembly 10 that rotates synchronously with the cabinet door 100 drives the sliding rod 20 to move outward, the inclined boss 40 moves synchronously, the roller 33 on the movable seat 32 rolls upward along the second inclined side surface 42, and the movable seat 32 extrudes the elastic reset component 31. When the cabinet door 100 rotates to a preset angle, the roller 33 on the movable seat 32 rolls to a highest point of the boss arc surface 43, i.e., the roller 33 on the movable seat 32 rolls to the force boundary point. At this time, the elastic reset component 31 is extruded to the maximum extent. After the roller 33 crosses the highest point (the force boundary point) of the boss arc surface 43, the roller 33 rolls downward along the first inclined side surface 41, the elastic reset component 31 gradually resets, a pushing force for outward movement is applied to the inclined boss 40 and the sliding rod 20, and the sliding rod 20 drives the cabinet door 100 to rotate outward by the driving 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 door opening angle of the cabinet door 100 reaches the maximum. During closing of the door, the driving assembly 10 that 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 surface 41, and the movable seat 32 extrudes the elastic reset component 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. At this time, the elastic reset component 31 is extruded to the maximum extent. When the roller 33 crosses the highest point of the boss arc surface 43, the roller 33 slides downward along the second inclined side surface 42, the elastic reset component 32 gradually resets, a pushing force for inward movement is applied to the inclined boss 40 and the sliding rod 20, and the sliding rod 20 drives the cabinet door 100 to be rotated and closed by the driving assembly 10, until the roller 33 rolls to the bottom of the second inclined side surface 42 and presses against the sliding rod 20. At this time, the cabinet door 100 is fully closed with the cabinet body 200. It should be noted that the opening angle of the cabinet door and the opening angle of the cabinet door when the roller 33 rolls to the highest point of the boss arc surface 43 can be preset as required.
[0021] The second inclined side surface 42 is connected to a connecting surface 44, i.e., the lengths of inclined slopes on two sides of the inclined boss 40 are different. During closing of the door, when the roller 33 rolls to the bottom of the second inclined side surface 42, the cabinet door 100 can be closed. However, since a gap is formed between the cabinet door 100 and the cabinet body 200 during mounting, the roller 33 continues rolling downward to the connecting surface 44 after rolling to the bottom of the second inclined side surface 42, the sliding rod 20 continues driving the cabinet door 100 to be closed by the driving assembly 10, and the cabinet door 100 is pressed tightly against the cabinet body 200, i.e., a negative angle is formed between the cabinet door 100 and the cabinet body 200, thereby preventing the gap from being formed between the cabinet door 100 and the cabinet body 200.
[0022] As shown in FIG. 2, the driving assembly 10 includes a driving gear 11 that rotates synchronously with the cabinet door, where the driving gear 11 meshes with a gear transmission set 12, the sliding rod 20 is connected to a rack 21, and the gear transmission set 12 meshes with the rack 21 on the sliding rod 20. When the cabinet door rotates, the driving gear 11 rotates synchronously, and the gear transmission set 12 meshes with the rack 21 on the sliding rod 20, thereby driving the sliding rod 20 to move linearly. When the sliding rod 20 is moved by the inclined boss and the elastic assembly 30, the gear transmission set 12 meshes with the rack 21 on the sliding rod 20 to reversely drive the driving gear 11 to rotate, thereby driving the cabinet door 100 to rotate, and providing assistance for opening and closing the cabinet door 100.
[0023] The rack 21 and the inclined boss 40 are arranged on two sides of the sliding rod 20 respectively, so that the sliding rod 20 rotates synchronously with the rack 21 and the inclined boss 40. The inclined boss 40 is mounted on a side surface of the sliding rod 20, and the bottoms of the first inclined side surface 41 and the second inclined side surface 42 of the inclined boss 40 are in smooth transition with the side surface of the sliding rod 20. As shown in FIG. 4 to FIG. 8, the rack 21 and the inclined boss 40 are arranged on a lower side surface and an upper side surface of the sliding rod 20 respectively. Correspondingly, the driving assembly 10 and the elastic assembly 30 are located on a lower side and an upper side of the sliding rod 20 respectively.
[0024] A linear damper 50 is further fitly provided at an end part of the sliding rod 20 and is arranged in a plastic sleeve, a cylinder 51 of the linear damper 50 is fitly provided with a piston rod 52, a damping medium and a reset spring are provided in the cylinder 51, a first wedge surface 531 is arranged at an end part of the piston rod 52, and a second wedge surface 201 that fits with the first wedge surface 531 is arranged at the end part of the sliding rod 20. During opening of the cabinet door 100, the linear damper 50 provides some assistance for the outward movement of the sliding rod 20, thereby reducing the effort required to open the door. During closing of the cabinet door 100, the sliding rod 20 moves inward to play a buffering role, thereby providing a slow-closing function for the cabinet door, and reducing noise.
[0025] The linear damper 50 is mounted on one side of the elastic assembly 30, a movable head 53 is mounted at the end part of the piston rod 52, the first wedge surface 531 is arranged on one side of the movable head 53, and a pressing plane 532 that presses against the sliding rod is formed at the top of the movable head 53. Before the door is opened, the pressing plane 532 of the movable head 53 on the piston rod 52 presses against the sliding rod 20, and the damping medium in the cylinder 51 is extruded by the piston rod 52 to the maximum extent. When the door is opened, the sliding rod 20 moves linearly outward under the action of the driving assembly 10. After the cabinet door rotates to a specific angle, the sliding rod 20 moves a distance, the first wedge surface 531 on the movable head 53 fits with the second wedge surface 201 of the sliding rod 20, and the piston rod 52 extends outward under the action of the damping medium and the reset spring in the cylinder 51, thereby providing some assistance for the linear outward movement of the sliding rod 20. As the sliding rod 20 continues moving linearly outward, the roller 33 of the elastic assembly 30 rolls upward along the second inclined side surface 42 to the highest point of the boss arc surface 43. At this time, the first wedge surface 531 on the movable head 53 is about to separate from the second wedge surface 201 of the sliding rod 20, the extension length of the piston rod 52 reaches the maximum, the linear damper 50 returns to the maximum position, and the elastic reset component 31 in the elastic assembly 30 is compressed to the maximum position. As the sliding rod 20 continues moving outward and the cabinet door 100 continues being opened, the linear damper 50 does not provide assistance for the movement of the sliding rod 20 and the rotation of the cabinet door 100. During closing of the door, as the cabinet door is closed, the sliding rod 20 is driven to move inward. When the roller 33 of the elastic assembly 30 rolls upward along the first inclined side surface 41 to the highest point of the boss arc surface 43 and then rolls to the second inclined side surface 42, the first wedge surface 531 on the movable head 53 begins to fit with the second wedge surface 201 of the sliding rod 20, the end part of the sliding rod 20 pushes the piston rod 52 connected to the movable head 53 to move into the cylinder 51 to extrude the damping medium in the cylinder 51, until the first wedge surface 531 on the movable head 53 separates from the second wedge surface 201, the pressing plane 532 on the movable head 53 presses against the sliding rod 20, and the damping medium in the cylinder 51 is extruded by the piston rod 52 to the maximum extent. As the sliding rod 20 continues moving inward and the cabinet door 100 continues being closed, the pressing plane 532 on the movable head 53 remains pressed against the side surface of the sliding rod 20.
[0026] As shown in FIG. 2, the driving assembly 10 and the elastic assembly 30 are mounted in a mounting box 60, and a slideway 61 for a sliding rod 20 to slide is arranged in the mounting box 60. The mounting box 60 includes a box body 601 and a cover body 602, where the slideway 61 divides an 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 arranged in the upper cavity, the linear damper 50 is located on one side of the elastic assembly 30, and the driving assembly 10 is arranged in the lower cavity. A limiting groove 63 for limiting the movement of the movable head 53 and the roller 33 on the movable seat 32 is further formed in the box body 601. The box body 601 and the cover body 602 are mounted by screws, the box body 601 is mounted at the top of the cabinet body 200, and a rotating shaft of the driving gear 11 penetrates through the box body 601 and is connected to the cabinet door 100.
[0027] As shown in FIG. 4 to FIG. 8, as a preferred embodiment, the gear transmission set 12 includes two driven gears 121 meshed with each other, where one driven gear 121 meshes with the driving gear 11, and the other driven gear 121 meshes with the rack 21 on the sliding rod 20. The preset maximum opening angle of the cabinet door is 90 degrees. When the linear damper 50 returns to the 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 assembly 30 is located at the highest point of the boss arc surface 43. Therefore, the opening angle range of the cabinet door is from 0° to 90° and when the closing angle of the cabinet door is less than 45°, the cabinet door 100 is closed automatically. When the opening angle of the cabinet door 100 is greater than 45°, the cabinet door 100 is opened automatically. During automatic closing of the cabinet door 100, the slow-closing function is provided.
[0028] In this embodiment, the door opening process is specifically as follows: as shown in FIG. 4, when the cabinet door is closed, the pressing plane 532 on the movable head 53 in the linear damper 50 presses against the sliding rod 20, and the roller 33 of the elastic assembly 30 is located at the bottom of the connecting surface 44 connected to the second inclined side surface 42. During opening of the door, the cabinet door 100 rotates, the driving gear 11 is driven to move the sliding rod 20 with the rack 21 by the two driven gears 121 meshing with each other, the roller 33 on the movable seat 32 rolls upward along the second inclined side surface 42, and the movable seat 32 extrudes the elastic reset component 31. As shown in FIG. 5, when the cabinet door rotates to 30 degrees, the second wedge surface 201 at the end part of the sliding rod 20 begins to fit with the first wedge surface 531 on the movable head 53, and the piston rod 52 extends outward under the action of the damping medium and the reset spring in the cylinder 51, thereby providing some assistance for the linear outward movement of the sliding rod 20. As shown in FIG. 6, when the cabinet door rotates to 45 degrees, the roller 33 on the movable seat 32 rolls along the second inclined side surface 42 to the highest point (the force boundary point) of the boss arc surface 43. At this time, the elastic reset component 31 is extruded to the maximum extent, the extension length of the piston rod 52 reaches the maximum, and the linear damper 50 returns to the maximum position. As shown in FIG. 7, when the cabinet door continues rotating, the roller 33 on the movable seat 32 crosses the highest point (the force boundary point) of the boss arc surface 43 and rolls downward along the first inclined side surface 41, the elastic reset component 31 gradually resets, a pushing force for outward movement is applied to the inclined boss 40 and the sliding rod 20, and the sliding rod 20 drives the cabinet door 100 to automatically rotate outward by the driving 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 door opening angle of the cabinet door 100 reaches the maximum, as shown in FIG. 8. The reverse operation is the door closing process. The roller 33 continues rolling downward to the connecting surface 44 after rolling to the bottom of the second inclined side surface 42, the sliding rod 20 continues driving the cabinet door 100 to be closed by the driving assembly 10, the cabinet door 100 is pressed tightly against the cabinet body 200, i.e., a negative angle is formed between the cabinet door 100 and the cabinet body 200, and the second wedge surface 201 at the end part of the sliding rod 20 fits with the first wedge surface 531 on the movable head 53, so that the cabinet door 100 is slowly closed, thereby reducing noise.
[0029] The hinge provided in the disclosure has undergone 100,000 damage- and fracture-free tests, with no significant functional degradation observed after 50,000 cycles, so that the hinge exhibits strong practicality and can be applied to large refrigerators.
[0030] As shown in FIG. 9 and FIG. 10, the disclosure further provides a cabinet using hinge mechanisms, including a cabinet body 200, where two cabinet doors 100 are mounted on the cabinet body 200 by pivot shafts, two hinge mechanisms for automatic door opening and closing are mounted at the top of the cabinet body, driving assemblies 10 in the two hinge mechanisms rotate synchronously with the corresponding cabinet doors 100, a connector 70 is arranged between the two hinge mechanisms, a connecting gear set 71 is arranged in the connector 70, the connecting gear set 71 meshes with two connecting racks 72 at the same time, and the two connecting racks 72 are connected to sliding rods 20 in the two hinge mechanisms by connecting rods 73 respectively. Two hinges are symmetrically arranged left and right, enabling the two cabinet doors 100 to be opened and closed synchronously. Sliding rods 20 in the two hinges move in opposite directions but are connected by the connector 70 to achieve synchronous movement. The hinge mechanism and the connector 70 are small in size. The size of the connecting rod 73 can be customized according to the size specification of the cabinet body. The connecting rod 73 is detachable and convenient to mount, thereby saving packaging costs.
[0031] It should be noted that the hinge mechanism is mounted at the top of the cabinet body 200 and cannot bear the weight of the cabinet door 100, and a pivot shaft seat mounted at the bottom of the cabinet door 100 and the cabinet body 200 can be used to bear the weight of the cabinet door 100. In summary, the technical solution of the disclosure can fully and effectively achieve the above objective of the disclosure, and the structure and functional principle of the disclosure have been fully verified in the embodiments and can achieve the expected effects and objective. Various changes or modifications can be made to the embodiments of the disclosure without departing from the principle and essence of the disclosure. Therefore, the disclosure includes all alternative contents within the scope mentioned in the patent application, and any equivalent changes made within the scope of the patent application of the disclosure fall within the scope of the patent application of the disclosure.
Claims
1. A hinge mechanism for automatic synchronous door opening and closing, comprising 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, the sliding rod is connected to an inclined boss that fits with the elastic assembly to extrude the elastic assembly to deform so as to drive the cabinet door to be opened or closed automatically, a force boundary point is formed on the inclined boss, and when the driving assembly drives the sliding rod to move until the elastic assembly is located at the force boundary point, and the elastic assembly crosses the force boundary point, the elastic assembly fits with the inclined boss to drive the sliding rod to move, and the sliding rod drives the driving assembly to rotate.
2. The hinge mechanism for automatic synchronous door opening and closing according to claim 1, wherein the elastic assembly comprises an elastic reset component, a movable seat for extruding the elastic reset component is arranged at one end of the elastic reset component, and a roller that rolls along the inclined boss is mounted on the movable seat by a pin shaft.
3. The hinge mechanism for automatic synchronous door opening and closing according to claim 2, wherein a first inclined side surface is formed on one side of the force boundary point on the inclined boss, a second inclined side surface is formed on the other side of the force boundary point on the inclined boss, a boss arc surface connected to the first inclined side surface and the second inclined side surface is formed at the top of the inclined boss, and the force boundary point is located at a topmost part of the boss arc surface.
4. The hinge mechanism for automatic synchronous door opening and closing according to claim 3, wherein the second inclined side surface is connected to a connecting surface.
5. The hinge mechanism for automatic synchronous door opening and closing according to claim 1, wherein the driving assembly comprises a driving gear that rotates synchronously with the cabinet door, the driving gear meshes with a gear transmission set, the sliding rod is connected to a rack, and the gear transmission set meshes with the rack on the sliding rod.
6. The hinge mechanism for automatic synchronous door opening and closing according to claim 5, wherein the rack and the inclined boss are arranged on two sides of the sliding rod respectively.
7. The hinge mechanism for automatic synchronous door opening and closing according to claim 1, wherein a linear damper is further fitly provided at an end part of the sliding rod, a cylinder of the linear damper is fitly provided with a piston rod, a first wedge surface is arranged at an end part of the piston rod, and a second wedge surface that fits with the first wedge surface is arranged at the end part of the sliding rod.
8. The hinge mechanism for automatic synchronous door opening and closing according to claim 7, wherein a movable head is mounted at the end part of the piston rod, the first wedge surface is arranged on one side of the movable head, and a pressing plane that presses against the sliding rod is formed at the top of the movable head.
9. The hinge mechanism for automatic synchronous door opening and closing according to claim 7, wherein the driving assembly, the elastic assembly, and the damper are all mounted in a mounting box, and a slideway for a sliding rod to slide is arranged in the mounting box.
10. A cabinet using hinge mechanisms according to any one of claims 1 to 9, comprising a cabinet body, wherein two cabinet doors are mounted on the cabinet body by pivot shafts, two hinge mechanisms are mounted at the top of the cabinet body, driving assemblies in the two hinge mechanisms rotate synchronously with the corresponding cabinet doors, a connector is arranged between the two hinge mechanisms, a connecting gear set is arranged in the connector, the connecting gear set meshes with two connecting racks at the same time, and the two connecting racks are connected to sliding rods in the two hinge mechanisms by connecting rods respectively.