Refrigerator door closing buffer device and refrigerator

Abstract

The present invention relates to the technical field of refrigerator equipment, and more specifically, to a refrigerator door closing buffer device, comprising a multi-stage buffer sealing handle mounted on the refrigerator movable door, the multi-stage buffer sealing handle comprising a mounting handle mounted on the refrigerator movable door, a side portion of the mounting handle being mounted with an air pressure sealing buffer mechanism that contacts the refrigerator door frame, a side portion of the air pressure sealing buffer mechanism being provided with a linked extrusion buffer mechanism, the linked extrusion buffer mechanism being fixedly connected to the mounting handle, a brake block being provided at one end of the air pressure sealing buffer mechanism away from the linked extrusion buffer mechanism, the brake block being fixedly connected to the mounting handle, the multi-stage buffer sealing handle further comprising a reset buffer positioning mechanism mounted on the refrigerator door frame, the contact end of the reset buffer positioning mechanism being in frictional contact with the brake block. The present invention can effectively improve the buffering effect through multiple buffering while ensuring sealing.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerator equipment, and in particular to a refrigerator door closing buffer device and the refrigerator. Background Art

[0002] At present, a refrigerator includes a cabinet body and a glass door. A door frame is provided on the cabinet body, and a door shell is provided on the glass plate. The door frame and the door shell are generally made of alloy material. The door shell is clamped on the door frame and can move on the door frame. The movement of the door shell on the door frame drives the glass plate to move on the cabinet body, thereby realizing the opening or closing process of the glass plate on the cabinet body. The glass plate on the refrigerator that can be moved left and right to open or close is called a sliding door. The sliding door includes two left and right leaves. When the right leaf sliding door moves to the left, the door is opened, and when the right leaf sliding door moves to the right, the door is closed. How the sliding door cooperates with the door frame on the refrigerator to realize door closing buffering is a problem that needs to be solved.

[0003] Chinese patent CN114575712A discloses a sliding door with a buffered door closing function for a refrigerator, which is arranged at the door frame of the refrigerator, the sliding door includes a glass plate and a door shell fixedly arranged at the top and bottom of the glass plate, the door shell is slidably arranged in the door frame, a motor is fixedly arranged in the door frame, a screw is fixedly arranged on the rotating shaft of the motor, a movable block is threadedly connected to the screw, and a buffered door closing assembly is provided on the movable block, the buffered door closing assembly includes a gear box, a first gear, a second gear and a third gear are rotatably arranged in the gear box, the diameter of the second gear is smaller than the first gear and the third gear and is respectively engaged with the first gear and the third gear, a rack corresponding to the first gear is fixedly arranged in the middle of the upper side of the door frame, and the rack is engaged with the first gear and the third gear. By this, the present invention has the advantages of being able to realize the coordination between the sliding door and the door frame and buffer the closing of the sliding door.

[0004] Although the above technical solution can slow down the moving force by using several gears on the gearbox, the gearbox will increase the movement resistance of the sliding door, resulting in a greater pushing force being required to move the sliding door. If the push is too great when trying to close the door quickly, it will still cause the edge of the sliding door to collide with the door frame. The sealant on the edge of the sliding door alone is difficult to effectively buffer the impact force. At the same time, when the sealant on the edge of the sliding door is hit, the rebound force generated by the impact makes it impossible for the sealant on the edge of the sliding door to resist the door frame well, resulting in poor sealing and air leakage. Summary of the Invention

[0005] To address the problems of the existing technology, a refrigerator door closing buffer device is provided. The multi-stage buffer sealing handle can effectively improve the buffering effect while ensuring the sealing. At the same time, a refrigerator with the above-mentioned buffer device is also provided.

[0006] In order to solve the problems of the prior art, the present invention provides a refrigerator door closing buffer device, comprising a multi-stage buffer sealing handle installed on the refrigerator movable door, the multi-stage buffer sealing handle including a mounting handle installed on the refrigerator movable door, an air pressure sealing buffer mechanism that contacts the refrigerator door frame is installed on the side of the mounting handle, a linked extrusion buffer mechanism is provided on one side of the air pressure sealing buffer mechanism, the linked extrusion buffer mechanism is fixedly connected to the mounting handle, a brake block is provided at one end of the air pressure sealing buffer mechanism away from the linked extrusion buffer mechanism, the brake block is fixedly connected to the mounting handle, the multi-stage buffer sealing handle also includes a reset buffer positioning mechanism installed on the refrigerator door frame, and the contact end of the reset buffer positioning mechanism frictionally contacts the brake block.

[0007] Preferably, the bottom of the mounting handle is provided with several clip-on fixing columns, the axial position of the clip-on fixing column is provided with a first expansion opening groove, the inner wall of the first expansion opening groove is provided with several anti-slip grooves, the outer wall of the clip-on fixing column is provided with a clip-on protrusion, the side of the mounting handle is provided with a limiting mounting groove, and several clips are distributed on the inner wall of the limiting mounting groove. The mounting handle also includes an expansion fixing nail clipped on the first expansion opening groove.

[0008] Preferably, the expansion fixing nail includes a limiting buckle, a positioning rod is provided at the axial position of the limiting buckle, the outer side of the positioning rod is covered with anti-slip rubber rings, and a guide angle is provided at the plug-in end of the positioning rod.

[0009] Preferably, the air pressure sealing buffer mechanism includes an exhaust base installed in the limiting installation groove, a sealing buffer bag is provided on the exhaust base, and the exhaust base is sealed to the sealing buffer bag.

[0010] Preferably, the outer side of the sealing buffer bag is provided with a stacking fold, the contact surface of the sealing buffer bag is covered with sealing pressure strips, the internal booster rail and the expansion chamber of the sealing buffer bag are connected to each other, and a number of stacking reset ribs are distributed inside the booster rail, the stacking reset ribs are in contact with the side of the exhaust base, and the interior of the expansion chamber is covered with arc-shaped reset ribs.

[0011] Preferably, an exhaust groove is provided on one side of the exhaust base, and several exhaust holes are distributed in the exhaust groove. An exhaust control head is installed in the exhaust holes. An exhaust control head is provided inside the exhaust control head. The exhaust control head is in a conical bucket shape. Openings are provided at both ends of the exhaust control head. The end with a larger diameter of the exhaust control head is the air inlet end, and the end with a smaller diameter of the exhaust control head is the air outlet end. Several elastic shrinkage grooves are distributed on the air outlet end. A pressure protrusion is also provided on the side of the exhaust base, and the pressure protrusion is docked with the internal boost rail of the sealing buffer bag.

[0012] Preferably, the linked extrusion buffer mechanism comprises an expansion pressing sleeve mounted on the mounting handle, a pressing buffer head is mounted on the expansion pressing sleeve, and a first spring is provided between the pressing buffer head and the expansion pressing sleeve.

[0013] Preferably, the open end of the expansion and pressing sleeve is provided with a plurality of second expansion opening grooves, the outer side of the expansion and pressing sleeve is provided with a limit installation groove, and an elastic reset ring is installed on the limit installation groove.

[0014] Preferably, the pressure buffer head includes a limiting slider installed inside the expansion pressure sleeve, and a conical boost column is provided at the axial position of the limiting slider. The conical boost column gradually increases at the end away from the expansion pressure sleeve, and an elastic pressure pad is also provided at the end away from the expansion pressure sleeve.

[0015] Preferably, the reset buffer positioning mechanism includes a mounting rail installed on the door frame of the refrigerator, a movable bottom plate is installed inside the mounting rail, a friction rack is also installed inside the mounting rail, a guide angle is provided on the side of the friction rack, a second spring is provided between the friction rack and the movable bottom plate, a limiting slide rail is provided on the side of the mounting rail, a pushing rod is installed on the limiting slide rail, one end of the pushing rod is provided with a guide angle, and the end of the pushing rod away from the guide angle is provided with a guide push groove, a rotating pry bar is rotatably installed on the bottom of the mounting rail, one end of the rotating pry bar is in conflict with the guide push groove, and the end of the rotating pry bar away from the guide push groove is in conflict with the movable bottom plate.

[0016] A refrigerator comprises a refrigerator door frame and a refrigerator movable door. The refrigerator movable door is slidably connected to the refrigerator door frame in an openable and closable manner, and the above-mentioned buffer device is installed on the refrigerator movable door.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The handle is installed to drive the refrigerator sliding door to move and close. If the user closes the door with too much force, the side air pressure sealing buffer mechanism of the installed handle will first conflict with the refrigerator door frame. When the air pressure sealing buffer mechanism is conflicted, the air inside the air pressure sealing buffer mechanism will be squeezed. After the air pressure sealing buffer mechanism is squeezed, the impact force of the air pressure buffer is buffered, and the air pressure sealing buffer mechanism will be squeezed during buffering, and then the extrusion buffer mechanism will conflict with the refrigerator door frame. The conflict of the refrigerator door frame is buffered by mechanical buffering. At the same time, the brake block of the air pressure sealing buffer mechanism will rub against the reset buffer positioning mechanism during impact buffering. The greater the impact force, the greater the friction coefficient between the brake block and the reset buffer positioning mechanism, which can effectively reduce the impact force of the refrigerator sliding door. At the same time, the friction between the brake block and the reset buffer positioning mechanism can also prevent the rebound force of the buffering from causing the air pressure sealing buffer mechanism to rebound and separate from the refrigerator door frame, so that the air pressure sealing buffer mechanism will still maintain conflict with the refrigerator door frame after the impact force is reduced to ensure sealing. The present application can effectively improve the buffering effect with multiple buffers and ensure sealing at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The invention discloses a freezer door closing buffer device and a three-dimensional schematic diagram of the freezer.

[0020] Figure 2The invention discloses a three-dimensional schematic diagram of a refrigerator door closing buffer device and a refrigerator movable door, a mounting handle, an air pressure sealing buffer mechanism, a linked extrusion buffer mechanism and a brake block in the refrigerator.

[0021] Figure 3 The present invention is a planar cross-sectional view of a refrigerator door closing buffer device and a refrigerator door frame in the refrigerator.

[0022] Figure 4 The present invention is an exploded view of a freezer door closing buffer device and a handle installed in the freezer.

[0023] Figure 5 The present invention is a three-dimensional schematic diagram of a refrigerator door closing buffer device and expansion fixing nails in the refrigerator.

[0024] Figure 6 It is a refrigerator door closing buffer device and a gas pressure sealing buffer mechanism in the refrigerator.

[0025] Figure 7 yes Figure 6 Cross-sectional view at section AA.

[0026] Figure 8 The invention is a three-dimensional schematic diagram of a refrigerator door closing buffer device and a linked extrusion buffer mechanism in the refrigerator.

[0027] Figure 9 The present invention is a planar cross-sectional view of a refrigerator door closing buffer device and a linked extrusion buffer mechanism in the refrigerator.

[0028] Figure 10 The invention is a stereoscopic schematic diagram of a refrigerator door closing buffer device and the braking cooperation state of a brake block and a reset buffer positioning mechanism in the refrigerator.

[0029] Figure 11 The present invention is a planar cross-sectional view of a refrigerator door closing buffer device and a reset buffer positioning mechanism in the refrigerator.

[0030] The numbers in the figure are:

[0031] 1- Freezer door frame; 2- Freezer sliding door; 3- Mounting handle; 31- Clamping fixing column; 311- First expansion slot; 312- Clamping protrusion; 32- Expansion fixing nail; 321- Limiting buckle; 322- Positioning plug rod; 323- Anti-slip rubber ring; 33- Limiting mounting slot; 4- Air pressure sealing buffer mechanism; 41- Sealing buffer capsule; 411- Stacking fold; 412- Sealing pressure strip; 413- Booster rail; 4131- Stacking reset rib; 414- Expansion chamber; 4141- Arc reset rib; 42- Exhaust base; 421- Exhaust slot; 422- Pressure protrusion; 423- Exhaust hole; 424-exhaust control head; 4241-inlet end; 4242-outlet end; 4243-elastic contraction groove; 5-linked extrusion buffer mechanism; 51-expansion pressure sleeve; 511-second expansion opening groove; 512-limiting card slot; 513-elastic reset ring; 52-pressure buffer head; 521-limiting slider; 522-conical increasing column; 523-elastic pressure pad; 53-first spring; 6-brake block; 7-reset buffer positioning mechanism; 71-friction rack; 72-mounting rail; 73-movable bottom plate; 74-second spring; 75-push rod; 76-rotating pry bar. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 11 As shown:

[0034] A refrigerator comprises a refrigerator door frame and a movable door, wherein the movable door is slidably connected to the refrigerator door frame so as to be openable and closable. The structure and coordination principle of the refrigerator door frame and the movable door are all prior art and will not be described in detail here. The movable door is equipped with a refrigerator door closing buffer device.

[0035] The above-mentioned buffering device includes a multi-stage buffering sealed handle installed on the refrigerator sliding door 2, and the multi-stage buffering sealed handle includes a mounting handle 3 installed on the refrigerator sliding door 2. The side of the mounting handle 3 is installed with an air pressure sealing buffer mechanism 4 that contacts the refrigerator door frame 1. One side of the air pressure sealing buffer mechanism 4 is provided with a linked extrusion buffer mechanism 5, and the linked extrusion buffer mechanism 5 is fixedly connected to the mounting handle 3. The air pressure sealing buffer mechanism 4 is provided with a brake block 6 at one end away from the linked extrusion buffer mechanism 5, and the brake block 6 is fixedly connected to the mounting handle 3. The multi-stage buffering sealed handle also includes a reset buffer positioning mechanism 7 installed on the refrigerator door frame 1, and the contact end of the reset buffer positioning mechanism 7 frictionally contacts the brake block 6.

[0036] The reset buffer positioning mechanism 7 is installed on the side wall of the slideway inside the refrigerator door frame 1. After the user takes out the things he needs to use from the inside of the refrigerator, the user drives the refrigerator movable door 2 to move and close it by installing the handle 3. If the user closes the door too hard, the air pressure sealing buffer mechanism 4 on the side of the installation handle 3 will first conflict with the refrigerator door frame 1. When the air pressure sealing buffer mechanism 4 is conflicted, the internal air will be squeezed. After the air pressure sealing buffer mechanism 4 is squeezed, the impact force will be buffered by air pressure. The air pressure sealing buffer mechanism 4 will be squeezed during the buffering process, and then the extrusion buffer mechanism 5 will conflict with the refrigerator door frame 1. The refrigerator door The impact of the frame 1 is buffered by mechanical buffering. At the same time, the brake block 6 of the pneumatic sealing buffer mechanism 4 will rub against the reset buffer positioning mechanism 7 during impact buffering. The greater the impact force, the greater the friction coefficient between the brake block 6 and the reset buffer positioning mechanism 7, which can effectively reduce the impact force of the refrigerator sliding door 2. At the same time, the friction between the brake block 6 and the reset buffer positioning mechanism 7 can also prevent the rebound force of the buffer from causing the pneumatic sealing buffer mechanism 4 to rebound and separate from the refrigerator door frame 1, so that after the impact force is reduced, the pneumatic sealing buffer mechanism 4 will still maintain contact with the refrigerator door frame 1 to ensure sealing. Multiple buffering can effectively improve the buffering effect while ensuring sealing.

[0037] like Figure 2 and Figure 4 As shown:

[0038] The bottom of the mounting handle 3 is provided with several clip-on fixing columns 31, the axial position of the clip-on fixing column 31 is provided with a first expansion slot 311, the inner wall of the first expansion slot 311 is provided with several anti-slip grooves, the outer wall of the clip-on fixing column 31 is provided with a clip-on protrusion 312, the side of the mounting handle 3 is provided with a limiting mounting groove 33, and the inner wall of the limiting mounting groove 33 is distributed with several clips. The mounting handle 3 also includes an expansion fixing nail 32 that is clipped and installed on the first expansion slot 311.

[0039] When the handle 3 is installed, the user can manually push the mounting handle 31 to move the door 2 to the next location.

[0040] like Figure 4 and Figure 5As shown:

[0041] The expansion fixing nail 32 includes a limiting buckle 321, and a positioning rod 322 is provided at the axial position of the limiting buckle 321. The outer side of the positioning rod 322 is covered with an anti-slip rubber ring 323, and the plug-in end of the positioning rod 322 is provided with a guide angle.

[0042] After the clamping fixing post 31 is inserted into the mounting hole of the refrigerator sliding door 2, the clamping protrusion 312 will be positioned and clamped on the mounting hole of the refrigerator sliding door 2. The staff holds the limit buckle 321 to keep the positioning rod 322 and the first expansion slot 311 inserted by the clamping fixing post 31 coaxially, and then inserts the positioning rod 322 into the first expansion slot 311. The insertion of the positioning rod 322 into the first expansion slot 311 will prevent the clamping fixing post 31 from shrinking and disengaging. The anti-slip rubber ring 323 on the positioning rod 322 is used to increase friction to prevent the positioning rod 322 from disengaging. The convenience of disassembly and fixation can be effectively improved by directly plugging and fixing.

[0043] like Figure 2 、 Figure 6 and Figure 7 As shown:

[0044] The air pressure sealing buffer mechanism 4 includes an exhaust base 42 installed in the limiting installation groove 33 . A sealing buffer capsule 41 is provided on the exhaust base 42 . The exhaust base 42 is sealed to the sealing buffer capsule 41 .

[0045] The exhaust base 42 is installed at the position of the limit installation groove 33 of the installation handle 3. When the user pushes the refrigerator movable door 2 to move through the installation handle 3, the user pushes too hard, which will cause the refrigerator movable door 2 to move quickly and cause a strong impact force. The sealed buffer bag 41 will first collide with the refrigerator door frame 1. The sealed buffer bag 41 will be squeezed when it collides. The air pressure inside the sealed buffer bag 41 can effectively reduce the impact force. At the same time, the internal air will also be gradually discharged from the exhaust base 42 to avoid the air bag from bursting. The contact between the sealed buffer bag 41 and the refrigerator door frame 1 can effectively ensure the sealing of the conflict.

[0046] like Figure 6 and Figure 7 As shown:

[0047] The outer side of the sealing buffer capsule 41 is provided with a stacking fold 411, and the contact surface of the sealing buffer capsule 41 is covered with a sealing pressure strip 412. The internal boost rail 413 and the expansion chamber 414 of the sealing buffer capsule 41 are connected to each other. The inside of the boost rail 413 is provided with a number of stacking reset ribs 4131, and the stacking reset ribs 4131 are in contact with the side of the exhaust base 42. The inside of the expansion chamber 414 is covered with arc-shaped reset ribs 4141.

[0048] The stacking fold 411 on the outside of the sealing buffer bladder 41 facilitates the contraction of the sealing buffer bladder 41. When the sealing buffer bladder 41 contacts the refrigerator door frame 1, the sealing pressure strip 412 of the sealing buffer bladder 41 will first contact the refrigerator door frame 1. When the sealing pressure strip 412 contacts the sealing buffer bladder 41, the sealing buffer bladder 41 will be squeezed and moved. When the sealing buffer bladder 41 moves, the internal booster rail 413 moves. The booster rail 413 cooperates with the exhaust base 42 to transport the internal pressurized air to the expansion chamber 414. The air supply to the expansion chamber 414 increases the pressure, which effectively increases the buffering elasticity of the expansion chamber 414. After the pushing force is reduced, the stacking reset rib 4131 inside the booster rail 413 pushes the booster rail 413 to elastically reset. The arc-shaped reset rib 4141 inside the expansion chamber 414 also pushes the expansion chamber 414 to elastically reset. The booster buffer can effectively ensure the buffering effect.

[0049] like Figure 6 and Figure 7 As shown:

[0050] An exhaust groove 421 is provided on one side of the exhaust base 42, and several exhaust holes 423 are distributed in the exhaust groove 421. An exhaust control head 424 is installed in the exhaust hole 423. An exhaust control head 424 is provided inside the exhaust control head 424. The exhaust control head 424 is in a conical bucket shape, and both ends of the exhaust control head 424 are provided with openings. The end with a larger diameter of the exhaust control head 424 is an air inlet end 4241, and the end with a smaller diameter of the exhaust control head 424 is an air outlet end 4242. Several elastic shrinkage grooves 4243 are distributed on the air outlet end 4242. A pressing protrusion 422 is also provided on the side of the exhaust base 42, and the pressing protrusion 422 is docked with the internal boost rail 413 of the sealing buffer bag 41.

[0051] When the sealing buffer capsule 41 is squeezed and moved, the internal boost rail 413 will move when the sealing buffer capsule 41 moves. When the boost rail 413 moves, the pressing protrusion 422 of the exhaust base 42 will squeeze the boost rail 413, so that the air in the boost rail is transported to the inside of the expansion chamber 414 for boost buffering. At the same time, when the buffer pressure is too high, the air will be discharged from the outlet end 4242 of the exhaust control head 424, and the discharged air will be discharged from the exhaust groove 421. When the exhaust control head 424 is exhausting, the exhaust end will be subjected to the pressure of the gas, resulting in the outlet end 4242 contracts toward the axial center, reducing the exhaust speed and effectively ensuring that the internal air pressure can be gradually buffered and reduced. When the sealed buffer capsule 41 returns to its original position and stops squeezing, it draws air inward. During this suction, external air quickly enters through the air inlet end 4241 of the exhaust control head 424. This air enters through the air end of the exhaust control head 424. As the air enters through the air outlet end 4242 of the exhaust control head 424, the air outlet end 4242 expands due to the airflow, increasing the intake speed. The exhaust control head 424 effectively controls the stable buffering amount of air pressure.

[0052] like Figure 2 and Figure 8 As shown:

[0053] The linked extrusion buffer mechanism 5 includes an expansion pressing sleeve 51 mounted on the mounting handle 3 , a pressing buffer head 52 is mounted on the expansion pressing sleeve 51 , and a first spring 53 is provided between the pressing buffer head 52 and the expansion pressing sleeve 51 .

[0054] When the air pressure sealing buffer mechanism 4 is squeezed, the air pressure will be used to buffer the impact force. The air pressure sealing buffer mechanism 4 will be squeezed during the buffering process, and the pressure buffer head 52 will press against the refrigerator door frame 1. When the pressure buffer head 52 is hit, the pressure buffer head 52 will pressurize the inside of the expansion pressure sleeve 51. The spring inside the expansion pressure sleeve 51 will buffer the pressure buffer head 52. At the same time, the pressure buffer head 52 will press against the opening of the expansion pressure sleeve 51. When the opening of the expansion pressure sleeve 51 is pressurized, the expansion pressure sleeve 51 will expand. The expansion of the expansion pressure opening will provide a secondary buffering of the impact force. Effectively linked multi-layer buffering reduces the impact force.

[0055] like Figure 8 and Figure 9 As shown:

[0056] The expansion and pressing sleeve 51 has a plurality of second expansion slots 511 at its open end. The expansion and pressing sleeve 51 has a limit slot 512 at its outer side. An elastic reset ring 513 is mounted on the limit slot 512 .

[0057] When the pressing buffer head 52 is impacted and moves toward the inside of the expansion pressing sleeve 51, the spring inside the expansion pressing sleeve 51 will buffer the pressing buffer head 52, and at the same time, the pressing buffer head 52 will press against the opening of the expansion pressing sleeve 51. When the pressing buffer head 52 presses against the opening of the expansion pressing sleeve 51, the opening of the expansion pressing sleeve 51 will expand outward, and the elastic reset ring 513 on the outside of the expansion pressing sleeve 51 will also expand at the same time, effectively preventing the pressing buffer head 52 from moving for buffering. After the impact force is buffered, the first spring 53 will push the pressing buffer head 52 out of the expansion pressing sleeve 51, and at the same time, the elastic reset ring 513 will drive the opening of the expansion pressing sleeve 51 to shrink and reset, and the impact force of the pressing buffer head 52 moving will be effectively prevented through the flexibility of the opening of the expansion pressing sleeve 51 and the contractility of the elastic reset ring 513.

[0058] like Figure 8 and Figure 9 As shown:

[0059] The pressure buffer head 52 includes a limiting slider 521 installed inside the expansion pressure sleeve 51. A conical boost column is provided at the axial position of the limiting slider 521. The conical boost column gradually increases at the end away from the expansion pressure sleeve 51. An elastic pressure pad 523 is also provided at the end of the conical boost column away from the expansion pressure sleeve 51.

[0060] The limiting slider 521 of the pressure buffer head 52 is used to limit and clamp in the inside of the expansion pressure sleeve 51. When the elastic pressure pad 523 of the pressure buffer head 52 contacts the refrigerator door frame 1, the elastic pressure pad 523 will push the conical boost column and the limiting slider 521 to slide and extend inside the expansion pressure sleeve 51. The limiting slider 521 will contact and contact with the first spring 53 for buffering. The conical boost column contacts the opening of the expansion pressure sleeve 51. The conical surface on the outside of the conical boost column drives the opening of the expansion pressure sleeve 51 to gradually expand outward for buffering.

[0061] like Figure 3 、 Figure 10 and Figure 11 As shown:

[0062] The reset buffer positioning mechanism 7 includes a mounting rail 72 mounted on the refrigerator door frame 1, a movable bottom plate 73 is installed inside the mounting rail 72, a friction rack 71 is also installed inside the mounting rail 72, a guide angle is provided on the side of the friction rack 71, a second spring 74 is provided between the friction rack 71 and the movable bottom plate 73, a limiting slide rail is provided on the side of the mounting rail 72, a pushing rod 75 is installed on the limiting slide rail, one end of the pushing rod 75 is provided with a guide angle, and the end of the pushing rod 75 away from the guide angle is provided with a guide push groove, a rotating pry bar 76 is rotatably installed at the bottom of the mounting rail 72, one end of the rotating pry bar 76 is in conflict with the guide push groove, and the end of the rotating pry bar 76 away from the guide push groove is in conflict with the movable bottom plate 73.

[0063] When locking sill 75 and locking sill 77 are positioned between locking sill 75 and locking sill 71, the positioning plate 74 away from that of locking sill 72 is turned away, and the positioning plate 74 between them is in the stable position where the bolt 72 is located.

[0064] Specific working principle:

[0065] When the user closes the door 2 with too much force, the side air pressure sealing buffer mechanism 4 of the installation handle 3 will first conflict with the door frame 1 of the refrigerator. When the air pressure sealing buffer mechanism 4 is conflicted, the air inside the air pressure sealing buffer mechanism 4 will be squeezed out. After the air pressure sealing buffer mechanism 4 is squeezed, the air pressure buffering impact force will be buffered during buffering. The air pressure sealing buffer mechanism 4 will be squeezed during buffering, and then the extrusion buffer mechanism 5 will conflict with the refrigerator door frame 1. The conflict of the refrigerator door frame 1 is buffered by mechanical buffering. At the same time, the brake block 6 of the air pressure sealing buffer mechanism 4 will frictionally conflict with the reset buffer positioning mechanism 7 during impact buffering. The greater the impact force, the greater the friction coefficient between the brake block 6 and the reset buffer positioning mechanism 7, which can effectively slow down the impact force of the refrigerator sliding door 2. At the same time, the friction between the brake block 6 and the reset buffer positioning mechanism 7 can also avoid the buffering rebound force causing the air pressure sealing buffer mechanism 4 to rebound and break away from the refrigerator door frame 1, so that after the impact force is reduced, the air pressure sealing buffer mechanism 4 will still maintain conflict with the refrigerator door frame 1 to ensure sealing.

[0066] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A refrigerator door closing buffer device, comprising a multi-stage buffer sealing handle, characterized in that: The multi-stage buffer seal handle comprises a mounting handle (3) mounted on a refrigerator sliding door (2); a side portion of the mounting handle (3) is mounted with a pneumatic sealing buffer mechanism (4) capable of contacting the refrigerator door frame (1); a linked extrusion buffer mechanism (5) is provided on one side of the pneumatic sealing buffer mechanism (4); the linked extrusion buffer mechanism (5) is fixedly connected to the mounting handle (3); a brake block (6) is provided at one end of the pneumatic sealing buffer mechanism (4) away from the linked extrusion buffer mechanism (5); the brake block (6) is fixedly connected to the mounting handle (3); the multi-stage buffer seal handle further comprises a reset buffer positioning mechanism (7) mounted on the refrigerator door frame (1); the contact end of the reset buffer positioning mechanism (7) is in frictional contact with the brake block (6); The bottom of the mounting handle (3) is provided with a plurality of snap-fit fixing columns (31), the axis position of the snap-fit fixing column (31) is provided with a first expansion slot (311), the inner wall of the first expansion slot (311) is provided with a plurality of anti-slip slots, the outer wall of the snap-fit fixing column (31) is provided with a snap-fit protrusion (312), the side of the mounting handle (3) is provided with a limit mounting slot (33), the inner wall of the limit mounting slot (33) is provided with a plurality of snap-fitting slots, the mounting handle (3) further includes an expansion fixing nail (32) snap-fitted on the first expansion slot (311); the expansion fixing nail (32) includes a limit buckle (321), the axis position of the limit buckle (321) is provided with a positioning rod (322), the outer side of the positioning rod (322) is covered with anti-slip rubber rings (323), and the plug-in end of the positioning rod (322) is provided with a guide angle; The air pressure sealing buffer mechanism (4) comprises an exhaust base (42) installed in the limit installation groove (33), a sealing buffer capsule (41) is provided on the exhaust base (42), and the exhaust base (42) is sealedly connected to the sealing buffer capsule (41); The outer side of the sealing buffer capsule (41) is provided with a stacking fold (411), the contact surface of the sealing buffer capsule (41) is covered with sealing pressing strips (412), the inner pressure boosting rail (413) and the expansion chamber (414) of the sealing buffer capsule (41) are connected to each other, the inner side of the pressure boosting rail (413) is provided with a plurality of stacking reset ribs (4131), the stacking reset ribs (4131) are in contact with the side of the exhaust base (42), and the inner side of the expansion chamber (414) is covered with arc-shaped reset ribs (4141); An exhaust groove (421) is provided on one side of the exhaust base (42), and a plurality of exhaust holes (423) are distributed in the exhaust groove (421). An exhaust control head (424) is installed in each of the exhaust holes (423). An exhaust control head (424) is provided inside the exhaust control head (424). The exhaust control head (424) is in a conical bucket shape. Both ends of the exhaust control head (424) are provided with openings. The end with a larger diameter of the exhaust control head (424) is an air inlet end (4241), and the end with a smaller diameter of the exhaust control head (424) is an air outlet end (4242). A plurality of elastic contraction grooves (4243) are distributed on the air outlet end (4242). A pressing protrusion (422) is also provided on the side of the exhaust base (42), and the pressing protrusion (422) is docked with the internal boost rail (413) of the sealing buffer bag (41).

2. The refrigerator door closing buffer device according to claim 1, characterized in that: The linked extrusion buffer mechanism (5) comprises an expansion pressing sleeve (51) mounted on the mounting handle (3), a pressing buffer head (52) mounted on the expansion pressing sleeve (51), and a first spring (53) provided between the pressing buffer head (52) and the expansion pressing sleeve (51).

3. The refrigerator door closing buffer device according to claim 2, characterized in that: The open end of the expansion and pressing sleeve (51) is provided with a plurality of second expansion slots (511), and the outer side of the expansion and pressing sleeve (51) is provided with a limit slot (512), and an elastic reset ring (513) is installed on the limit slot (512).

4. The refrigerator door closing buffer device according to claim 3, characterized in that: The pressure buffer head (52) includes a limiting slider (521) installed inside the expansion pressure sleeve (51), and a conical pressure boosting column is provided at the axial position of the limiting slider (521). The conical pressure boosting column gradually increases at the end away from the expansion pressure sleeve (51), and an elastic pressure pad (523) is also provided at the end away from the expansion pressure sleeve (51).

5. The refrigerator door closing buffer device according to claim 4, characterized in that: The reset buffer positioning mechanism (7) comprises a mounting rail (72) mounted on the refrigerator door frame (1), a movable bottom plate (73) being mounted inside the mounting rail (72), a friction rack (71) being mounted inside the mounting rail (72), a guide angle being provided on the side of the friction rack (71), a second spring (74) being provided between the friction rack (71) and the movable bottom plate (73), a limiting slide rail being provided on the side of the mounting rail (72), a push rod (75) being mounted on the limiting slide rail, one end of the push rod (75) being provided with a guide angle, an end of the push rod (75) being provided with a guide push groove away from the guide angle, a rotating pry bar (76) being rotatably mounted on the bottom of the mounting rail (72), one end of the rotating pry bar (76) being in contact with the guide push groove, and an end of the rotating pry bar (76) being in contact with the movable bottom plate (73) away from the guide push groove.

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