An anti-wear door opening device

Abstract

An anti-wear door opening device, comprising a bracket and a movable arm assembly, the movable arm assembly being hinged to open and close on the bracket, further comprising a wear-resistant member, the movable arm assembly acting on the wear-resistant member when hinged to open and close; the movable arm assembly includes a movable arm hinged to open and close on the bracket and an acting member provided at one end of the movable arm, when the movable arm is hinged to open and close, the acting member contacts the wear-resistant member; the acting member is fixedly provided on the movable arm, and the acting member and the movable arm are made of different materials; the acting member is in rolling or sliding contact with the wear-resistant member, and the acting member is made of plastic with plasticity; the bracket is provided on the cabinet body, and the wear-resistant member is provided on the door body. In the present invention, by providing a wear-resistant member on the door body of the furniture, the movable arm assembly acts on the wear-resistant member when hinged to open and close on the bracket, thus avoiding direct contact between the movable arm assembly and the door body and scratching the door body. The movable arm assembly is in rolling or sliding contact with the wear-resistant member through the acting member made of plastic, so that the movable arm assembly rotates more smoothly when hinged to open and close.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture, and particularly relates to an anti-wear door opening device. Background Art

[0002] Chinese Patent Document No. CN113463998A disclosed a pressing automatic opening and closing and resetting structure for furniture on October 1, 2021, including a pressing resetting device and a sliding device; the pressing resetting device includes a bracket, on which a pressing component, a pushing component, an opening and closing component and a connecting arm are arranged; a transmission component is arranged on the connecting arm and is respectively in transmission connection with the pushing component and the opening and closing component through the transmission component; a reset component is arranged between the pushing component and the opening and closing component, and the two are in reset cooperation through the reset component; the sliding device includes a fixing piece; one end of the connecting arm is pressingly and automatically articulated and opened and closed on the bracket through the cooperation of the pressing component, the pushing component, the opening and closing component and the reset component, and a disassembly and assembly sliding component is arranged between the other end and the fixing piece. The connecting arm is detachably connected to the fixing piece through the disassembly and assembly sliding component and slides on the fixing piece through the disassembly and assembly sliding component during automatic articulated opening and closing. When the connecting arm is articulated and opened and closed, the sliding piece slides on the chute part of the fixing piece through the connecting piece, but the connecting piece may contact the furniture door body when the sliding piece slides, resulting in scratching of the furniture door body.

[0003] Therefore, it is necessary to make further improvements. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-wear door opening device with a simple structure, which can avoid scratching the door body, is convenient to operate and has strong practicability, so as to overcome the deficiencies in the prior art.

[0005] An anti-wear door opening device designed according to this purpose includes a bracket and a movable arm assembly, and the movable arm assembly is articulated and opened and closed on the bracket. It is characterized in that: it further includes a wear-resistant part, and the movable arm assembly acts on the wear-resistant part when articulated and opened and closed.

[0006] The movable arm assembly includes a movable arm articulated and opened and closed on the bracket and an acting part arranged at one end of the movable arm. When the movable arm is articulated and opened and closed, the acting part contacts the wear-resistant part.

[0007] The acting part is fixedly arranged on the movable arm, and the acting part and the movable arm are made of different materials.

[0008] The acting part is in rolling or sliding contact with the wear-resistant part, and the acting part is made of plastic with plasticity.

[0009] The bracket is arranged on the cabinet body, and the wear-resistant part is arranged on the door body.

[0010] The wear-resistant part is arranged on the door body by clamping, pasting or fasteners.

[0011] The surface of the wear-resistant part is on the same plane as the inner side surface of the door body; or, the wear-resistant part is protruded or recessed on the inner side surface of the door body.

[0012] The setting positions of the acting part and the wear-resistant part correspond to each other, and the acting part moves on the wear-resistant part when the movable arm assembly is hinged and opened or closed.

[0013] An elastically movable pressing assembly, a locking and separating assembly, and a slider assembly are arranged on the bracket. A transmission arm is arranged between the locking and separating assembly and / or the slider assembly and the pressing assembly. A transmission assembly is arranged between one ends of the slider assembly and the movable arm assembly. An unlocking guiding part is arranged between the locking and separating assembly and the slider assembly. An opening and closing guiding part is arranged between the movable arm assembly and the transmission assembly.

[0014] When the door opening device is started, the pressing assembly drives the transmission arm to act on the locking and separating assembly through pressing, so that the locking and separating assembly and the slider assembly are unlocked from each other. Then, a part of the slider assembly moves towards the transmission arm direction. The slider assembly drives the pressing assembly to elastically extend out of the bracket through the transmission arm. At the same time, the movable arm assembly elastically rotates and extends out of the bracket along the opening and closing guiding part. When the movable arm assembly is opened to a corresponding angle, a part of the slider assembly elastically resets. The locking and separating assembly elastically resets and locks with the slider assembly. The pressing assembly elastically resets and acts on the transmission arm, so that the transmission arm resets. And the movable arm assembly disengages from the opening and closing guiding part of the transmission assembly during the continuous elastic rotation process.

[0015] When the movable arm assembly is closed, it drives the transmission assembly to act on another part of the slider assembly through the opening and closing guiding part. When the movable arm assembly is closed to a corresponding angle, the elastic acting forces of the movable arm assembly and the slider assembly acting on the transmission assembly are basically balanced, so that the movable arm assembly produces a hovering effect, and the movable arm assembly continues to close under the action of an external force.

[0016] The transmission arm is provided with a first acting end, a second acting end, and a third acting end.

[0017] When the pressing assembly elastically moves, it drives the transmission arm to move through the first acting end, and the third acting end acts on the locking and separating assembly, so that the locking and separating assembly and the slider assembly are unlocked; or, when the pressing assembly elastically moves, it drives the transmission arm to reset through the first acting end.

[0018] When the locking and separating assembly and the slider assembly are unlocked, the slider assembly elastically moves and drives the transmission arm to move through the second acting end, and the transmission arm acts on the pressing assembly through the first acting end, so that the pressing assembly elastically extends out.

[0019] A first elastic member is arranged between the locking and separating assembly and the bracket. The locking and separating assembly elastically moves on the bracket through the first elastic member, and unlocks or locks with the slider assembly through the unlocking guiding part during the elastic movement; a second elastic member is arranged between the pressing assembly and the bracket. The pressing assembly elastically moves on the bracket through the second elastic member and acts on the transmission arm during the elastic movement.

[0020] A third elastic member is provided between the movable arm assembly and the bracket, and the movable arm assembly is elastically movable on the bracket through the third elastic member; a fourth elastic member is provided between the slider assembly and the bracket, and the slider assembly is elastically movable on the bracket through the fourth elastic member. When the movable arm assembly is opened to a corresponding angle, the fourth elastic member elastically acts on the slider assembly to enable the slider assembly to elastically reset.

[0021] Linear limit guiding portions are respectively provided on the bracket corresponding to the locking and separating assembly, the slider assembly and the pressing assembly, and the locking and separating assembly, the slider assembly and the pressing assembly are respectively linearly limited and movable on the bracket through the linear limit guiding portions.

[0022] The present invention has the following beneficial effects:

[0023] 1. By providing a wear-resistant member on the door body of the furniture, when the movable arm assembly is hinged and opened and closed on the bracket, it acts on the wear-resistant member, thus avoiding direct contact between the movable arm assembly and the door body and scratching the door body. The movable arm assembly is in rolling or sliding contact with the wear-resistant member through a acting member made of plastic, so that the movable arm assembly rotates more smoothly when hinged and opened and closed, and further makes the opening and closing of the door body smoother.

[0024] 2. The movable arm assembly does not need to be installed on the door body of the furniture, and only needs to fix the bracket on the cabinet body of the furniture, which can simplify the installation and disassembly of the door opening device and improve the assembly efficiency of the door opening device.

[0025] 3. After pressing the pressing assembly of the door opening device, the movable arm assembly can be automatically fully opened, ensuring that the user can complete the opening of the movable arm assembly with the simplest and most convenient operation, and improving the user experience.

[0026] 4. When the movable arm assembly is opened to a corresponding angle, the pressing assembly, the locking and separating assembly, the slider assembly and the transmission arm will automatically reset, ensuring that the movable arm assembly can be automatically opened when the pressing assembly is pressed next time.

[0027] 5. When the movable arm assembly is closed to a corresponding angle, the elastic acting forces of the movable arm assembly and the slider assembly on the transmission assembly are basically balanced, enabling the movable arm assembly to produce a hovering effect (the movable arm assembly can hover at any angular position when continuing to close). At this time, a very small force can be used to continue closing the movable arm assembly. When the door opening device is applied to furniture, a hinge with a relatively large elastic force can be installed between the cabinet body and the door body of the furniture. When the movable arm assembly produces a hovering effect, the automatic closing of the movable arm assembly (i.e., the door body) can be realized through the hinge. At this time, the user does not need to push the door body, simplifying the user's door closing operation and improving the user experience. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of the furniture in an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the disassembled structure of the furniture in an embodiment of the present invention.

[0030] Figures 3 - 7 This is a schematic diagram of the opening operation process of the door opening device in an embodiment of the present invention.

[0031] Figures 8 - 10 This is a schematic diagram of the closing operation process of the door opening device in an embodiment of the present invention.

[0032] Figure 11 This is a cross-sectional view of the door opening device in an embodiment of the present invention.

[0033] Figure 12 This is a schematic diagram of the internal structure of the door opening device in an embodiment of the present invention.

[0034] Figure 13 This is a schematic diagram of the overall structure of the door opening device in an embodiment of the present invention.

[0035] Figure 14 This is a schematic diagram of the disassembled structure of the door opening device in an embodiment of the present invention. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Refer to Figures 1 - 14 , this anti-wear door opening device includes a bracket 1 and a movable arm assembly 2. The movable arm assembly 2 is hinged to open and close on the bracket 1, and further includes an anti-wear member c. When the movable arm assembly 2 is hinged to open and close, it acts on the anti-wear member c.

[0038] The movable arm assembly 2 includes a movable arm 12 hinged to open and close on the bracket 1 and an acting member 20 provided at one end of the movable arm 12. When the movable arm 12 is hinged to open and close, the acting member 20 contacts the anti-wear member c.

[0039] The acting member 20 is fixedly provided on the movable arm 12. The acting member 20 and the movable arm 12 are made of different materials. In this embodiment, the movable arm 12 is made of a metal material.

[0040] The acting member 20 is in rolling or sliding contact with the anti-wear member c. The acting member 20 is made of a plastic with plasticity. In this embodiment, the acting member 20 is a roller rotatably provided on the movable arm 12, and the roller is in rolling contact with the anti-wear member c.

[0041] The bracket 1 is provided on the cabinet body a of the furniture, and the anti-wear member c is provided on the door body b.

[0042] The wear-resistant part c is arranged on the door body b by snap connection, pasting or fasteners; specifically, the wear-resistant part c can be connected to the door body b by a buckle, or pasted on the door body b by an adhesive or glue, or fixed on the door body b by screws. In this embodiment, it is preferably pasted on the door body b by an adhesive.

[0043] The surface of the wear-resistant part c is on the same plane as the inner side surface of the door body b; alternatively, the wear-resistant part c is protruded or recessed on the inner side surface of the door body b. The door body b can be provided with a groove for installing the wear-resistant part c, and the wear-resistant part c is installed in the groove so that the surface of the wear-resistant part c is on the same plane as the inner side surface of the door body b or the wear-resistant part c is recessed on the inner side surface of the door body b. The door body b can also not be provided with a groove, and the wear-resistant part c is directly installed on the door body b so that the wear-resistant part c protrudes on the inner side surface of the door body b. In this embodiment, it is preferably that the door body b is not provided with a groove.

[0044] The position of the acting part 20 corresponds to that of the wear-resistant part c. When the movable arm assembly 2 is hinged to open and close, the acting part 20 moves on the wear-resistant part c, that is, the acting part 20 rolls on the wear-resistant part c, and when the acting part 20 rolls, it acts on the door body b through the acting part 20, so as to open or close the door body b when the movable arm assembly 2 is hinged to open and close.

[0045] An elastically movable pressing assembly 3, a locking and separating assembly 5 and a slider assembly 6 are arranged on the bracket 1. A transmission arm 4 is arranged between the locking and separating assembly 5 and / or the slider assembly 6 and the pressing assembly 3. A transmission assembly 7 is arranged between one ends of the slider assembly 6 and the movable arm assembly 2. An unlocking guiding part is arranged between the locking and separating assembly 5 and the slider assembly 6. An opening and closing guiding part is arranged between the movable arm assembly 2 and the transmission assembly 7.

[0046] When the door opening device is started, the pressing assembly 3 acts on the locking and separating assembly 5 through pressing to drive the transmission arm 4, so that the locking and separating assembly 5 and the slider assembly 6 are unlocked from each other. Furthermore, a part of the slider assembly 6 moves towards the transmission arm 4. The slider assembly 6 drives the pressing assembly 3 to elastically extend out of the bracket 1 through the transmission arm 4, and at the same time, the movable arm assembly 2 elastically rotates and extends out of the bracket 1 along the opening and closing guiding part; when the movable arm assembly 2 is opened to a corresponding angle, a part of the slider assembly 6 elastically resets, the locking and separating assembly 5 elastically resets and locks with the slider assembly 6, the pressing assembly 3 elastically resets and acts on the transmission arm 4 to make the transmission arm 4 reset, and the movable arm assembly 2 disengages from the opening and closing guiding part of the transmission assembly 7 during the continuous elastic rotation process.

[0047] When the movable arm assembly 2 is closed, it drives the transmission assembly 7 to act on another part of the slider assembly 6 through the opening and closing guiding part. When the movable arm assembly 2 is closed to a corresponding angle, the elastic acting forces of the movable arm assembly 2 and the slider assembly 6 acting on the transmission assembly 7 are basically balanced, so as to make the movable arm assembly 2 produce a hovering effect, and the movable arm assembly 2 continues to close under the action of an external force.

[0048] This door opening device is applied to furniture. The door body b is hinged to the cabinet body a through a hinge c with relatively large elasticity. When the door body b is closed, pressing the door body b will then press the pressing component 3 through the door body, realizing the opening of the door body b. After the door body b is opened, pushing the door body b by hand, the door body b starts to close, and the movable arm 12 also closes simultaneously. When the movable arm 12 closes to a corresponding angle, the elastic acting forces of the movable arm assembly 2 and the slider assembly 6 on the transmission assembly 7 are basically balanced. At this time, releasing the door body b, under the elastic force of the hinge c, the door body b will automatically close, and the movable arm 12 closes simultaneously.

[0049] By setting the roller 20, when the movable arm 2 is hinged and opened and closed on the bracket 1, the roller 20 is in rolling contact with the door body b, realizing the opening or closing of the door body b, so that the movable arm 2 does not need to be installed with the door body b, which can simplify the installation and disassembly of the door opening device.

[0050] A first elastic member 10 is provided between the lock release assembly 5 and the bracket 1. The lock release assembly 5 is elastically movable on the bracket 1 through the first elastic member 10, and is unlocked or locked with the slider assembly 6 through the unlocking guiding portion during elastic movement; a second elastic member 18 is provided between the pressing assembly 3 and the bracket 1. The pressing assembly 3 is elastically movable on the bracket 1 through the second elastic member 18 and acts on the transmission arm 4 during elastic movement.

[0051] The lock release assembly 5 at least includes a lock release member 8, and the slider assembly 6 at least includes a slider 9. The unlocking guiding portion is provided between the lock release member 8 and the slider 9;

[0052] The lock release member 8 is elastically movable on the bracket 1 and is unlocked or locked with the slider 9 through the unlocking guiding portion during elastic movement.

[0053] The unlocking guiding portion includes a lock release portion 8.1 provided on the lock release member 8 and a guiding and cooperating portion 9.1 provided on the slider 9. The first elastic member 10 is a spring, and the second elastic member 18 is a spring;

[0054] The lock release member 8 is elastically movable on the bracket 1 through the first elastic member 10 so that the lock release portion 8.1 is locked or disengaged from the guiding and cooperating portion 9.1; specifically, the lock release portion 8.1 is a limiting block provided on the side of the lock release member 8, and the guiding and cooperating portion 9.1 is a limiting shaft provided on the slider 9. When the door opening device is not activated, the guiding and cooperating portion 9.1 and the lock release portion 8.1 are mutually limited and locked. When pressing the pressing assembly 3, the pressing assembly 3 drives the transmission arm 4 to swing, so that the transmission arm 4 pushes the lock release member 8 downward ( Figure 5(in the direction of the arrow), thereby causing the guiding and mating portion 9.1 and the locking and separating portion 8.1 to disengage from each other. At this time, under the elastic force of the fifth elastic member 14, the slider 9 moves in the direction of the transmission arm 4 and drives the transmission arm 4 to swing; when the movable arm assembly 2 is opened to a corresponding angle, the fourth elastic member 15 drives the slider 9 to elastically reset (i.e., the slider 9 moves in the opposite direction to the direction of the transmission arm 4), causing the pressing assembly 3 to elastically reset and driving the transmission arm 4 to swing, so that the transmission arm 4 is reset. At the same time, the first elastic member 10 pushes the locking and separating member 8 upward ( Figure 5 (in the direction of the arrow), thereby causing the guiding and mating portion 9.1 and the locking and separating portion 8.1 to be mutually limited and locked.

[0055] The pressing assembly 3 at least includes a pressing member 11. The pressing member 11 is elastically movable on the bracket 1 through the second elastic member 18 and acts on the transmission arm 4 during elastic movement. After the pressing member 11 extends out of the bracket 1, when the slider 9 elastically resets, the second elastic member 18 elastically acts on the pressing member 11 to make the pressing member 11 elastically reset.

[0056] The transmission arm 4 is provided with a first acting end 4.1, a second acting end 4.2, and a third acting end 4.3;

[0057] When the pressing member 11 elastically moves (presses), it drives the transmission arm 4 to move through the first acting end 4.1, and the third acting end 4.3 acts on the locking and separating member 8 to push the locking and separating member 8 downward, thereby unlocking (separating from each other) the locking and separating member 8 and the slider 9; or, when the pressing member 11 elastically moves, it drives the transmission arm 4 to reset through the first acting end 4.1, that is, when the pressing member 11 extends out of the bracket 1 and elastically resets through the second elastic member 18, the pressing member 11 drives the transmission arm 4 to reset through the first acting end 4.1.

[0058] When the locking and separating member 8 and the slider 9 are unlocked, the slider 9 elastically moves (moves in the direction of the transmission arm 4) and drives the transmission arm 4 to move through the second acting end 4.2, and the transmission arm 4 acts on the pressing member 11 through the first acting end 4.1, thereby causing the pressing member 11 to elastically extend out of the bracket 1. When the slider 9 moves in the direction of the transmission arm 4, the first acting end 4.1 of the transmission arm 4 disengages from the locking and separating member 8. At this time, the limiting action of the locking and separating portion 8.1 of the locking and separating member 8 on the guiding and mating portion 9.1 of the slider 9 makes the locking and separating member 8 unable to move upward.

[0059] A third elastic member 13 is provided between the movable arm assembly 2 and the bracket 1. The movable arm assembly 2 elastically moves on the bracket 1 through the third elastic member 13. The third elastic member 13 is a torsion spring. One end of the torsion spring elastically acts on the acting portion 1.1 of the bracket 1, and the other end of the torsion spring elastically acts on the movable arm 12. The movable arm 12 elastically moves on the bracket 1 through the third elastic member 13. The slider assembly 6 further includes a fifth elastic member 14 and a transmission fitting 17. The slider 9 is elastically connected to the transmission fitting 17 through the fifth elastic member 14. The fifth elastic member 14 is a spring, and the transmission fitting 17 cooperates with the transmission assembly 7;

[0060] When the locking and separating member 8 unlocks from the slider 9, the fifth elastic member 14 elastically acts on the slider 9, so that the slider 9 moves towards the transmission arm 4, and further makes the elastic force of the movable arm assembly 2 on the transmission assembly 7 greater than the elastic force of the slider assembly 6 on the transmission assembly 7. Then, through the elastic force of the third elastic member 13, the movable arm 12 elastically extends outside the bracket 1. Specifically, when the door opening device is not activated, that is, when the pressing assembly 3 is not pressed, at this time, the fifth elastic member 14 is in a compressed state. The elastic force of the fifth elastic member 14 acts on the transmission assembly 7 through the transmission fitting 17, and then acts on the movable arm 12. At this time, the elastic force of the fifth elastic member 14 is basically the same (balanced) as the elastic force of the third elastic member 13, so that the movable arm 12 will not rotate. When the pressing assembly 3 is pressed, the slider 9 moves towards the transmission arm 4, so that the elastic force of the fifth elastic member 14 is released (the fifth elastic member 14 is in a stretched state). At this time, the elastic force of the fifth elastic member 14 is less than the elastic force of the third elastic member 13, and the movable arm 12 automatically opens under the elastic force of the third elastic member 13 and remains open until the maximum position.

[0061] A fourth elastic member 15 is provided between the slider assembly 6 and the bracket 1. The slider assembly 6 elastically moves on the bracket 1 through the fourth elastic member 15. The fourth elastic member 15 is a tension spring. When the movable arm assembly 2 is opened to a corresponding angle, the fourth elastic member 15 elastically acts on the slider 9 to make the slider 9 elastically reset. When the slider 9 elastically resets, it drives the transmission fitting 17 to move through the fifth elastic member 14.

[0062] A connecting rod 19 is provided on the slider 9. The slider 9 is movably connected to the transmission fitting 17 through the connecting rod 19. The fifth elastic member 14 is sleeved on the connecting rod 19, and one end of the fifth elastic member 14 elastically acts on the slider 9, and the other end of the fifth elastic member 14 elastically acts on the transmission fitting 17. One end of the connecting rod 19 is provided with a limiting portion 19.1, and the transmission fitting 17 is provided with a limiting and cooperating portion 17.2. When the slider 9 moves towards the transmission arm 4, it drives the connecting rod 19 to move and is limited on the limiting and cooperating portion 17.2 through the limiting portion 19.1.

[0063] The transmission assembly 7 includes at least a swing block 16. The swing block 16 is hinged to the bracket 1. The opening and closing guiding part is arranged between the movable arm 12 and the swing block 16. The swing block 16 and the transmission fitting 17 cooperate with each other;

[0064] When the movable arm 12 is closed, it drives the swing block 16 to swing through the opening and closing guiding part. When the swing block 16 swings, it acts on the transmission fitting 17, so that the transmission fitting 17 moves in the direction of the slider 9 and acts on the slider 9 through the fifth elastic member 14. At this time, the slider 9 does not move (because the locking member 8 and the slider 9 are in a mutually locked state). When the transmission fitting 17 moves, the fifth elastic member 14 is compressed. When the movable arm 12 is closed to a corresponding angle, the elastic acting forces of the movable arm assembly 2 and the slider assembly 6 acting on the transmission assembly 7 are basically balanced, that is, the elastic force of the fifth elastic member 14 and the elastic force of the third elastic member 13 are basically balanced (the same). The elastic force of the fifth elastic member 14 acts on the swing block 16 through the transmission fitting 17, and then the swing block 16 acts on the movable arm 12 through the opening and closing guiding part, so that the movable arm 12 produces a hovering effect.

[0065] The opening and closing guiding part includes a guiding part 12.1 arranged on the movable arm 12 and a curve guiding and cooperating part 16.1 arranged on the swing block 16. The guiding part 12.1 is a runner rotatably arranged on the movable arm 12;

[0066] When the movable arm assembly 2 is opened, the slider 9 is elastically reset and drives the transmission fitting 17 to move. The transmission fitting 17 drives the swing block 16 to swing and acts on the movable arm 12, so that the movable arm 12 rotates and opens along the curve guiding and cooperating part 16.1 through the guiding part 12.1; See Figures 6 - 8 There is an acting point 16.2 on the curve guiding and cooperating part 16.1. When the movable arm 12 is opened to a corresponding angle, the guiding part 12.1 disengages from the curve guiding and cooperating part 16.1 along the acting point 16.2, so that the movable arm 12 disengages from the swing block 16 (transmission assembly 7). After that, when the movable arm 12 continues to open, the movable arm 12 is in a state of disengaging from the swing block 16;

[0067] When the movable arm assembly 2 is closed to a corresponding angle, the guiding part 12.1 of the movable arm 12 acts on the curve guiding and cooperating part 16.1 along the acting point 16.2 under the action of an external force, so that the swing block 16 swings. See Figures 8 - 10 、 Figure 3 ( Figure 3 is a schematic diagram of the complete closing of the movable arm assembly 2), when the movable arm assembly 2 starts to close, the guiding part 12.1 does not act on the curve guiding and cooperating part 16.1. See Figure 10When the movable arm assembly 2 is closed to a corresponding angle, the guiding part 12.1 contacts the acting point 16.2 at this time. Then when the movable arm assembly 2 continues to close, the guiding part 12.1 acts on the curved guiding mating part 16.1 until the movable arm assembly 2 is completely closed;

[0068] During the opening or closing process of the movable arm 12, the guiding part 12.1 and the curved guiding mating part 16.1 guide the rotation of the movable arm 12.

[0069] Linear limiting and guiding parts are respectively arranged on the bracket 1 corresponding to the locking and separating part 8, the slider 9 and the pressing part 11. The locking and separating part 8, the slider 9 and the pressing part 11 are linearly limited and move on the bracket 1 through the linear limiting and guiding parts respectively.

[0070] The working process of the door opening device:

[0071] Opening process:

[0072] See Figures 3 - 8 , press the pressing part 11, the pressing part 11 drives the transmission arm 4 to push the locking and separating part 8 downward, the locking and separating part 8 and the slider 9 are unlocked from each other, the slider 9 moves in the direction of the transmission arm 4 under the elastic force of the fifth elastic part 14, the movable arm 2 opens under the elastic force of the third elastic part 13. At the same time, the slider 9 drives the transmission arm 4 to push the pressing part 11 downward, so that the pressing part 11 extends out of the bracket 1. When the movable arm 12 opens to a corresponding angle, the slider 9 resets under the elastic force of the fourth elastic part 15 and drives the transmission mating part 17 to move. The transmission mating part 17 drives the swing block 16 to act on the movable arm 12, so that the movable arm 12 continues to open along the opening and closing guiding part under the elastic force of the third elastic part 13. When it continues to open to a corresponding angle, the movable arm 12 disengages from the swing block 16, and then the movable arm 12 continues to open to the maximum position; when the slider 9 resets, the pressing part 11 resets under the elastic force of the second elastic part 18. When the pressing part 11 resets, it drives the transmission arm 4 to reset. At the same time, the locking and separating part 8 resets under the elastic force of the first elastic part 10, and after the locking and separating part 8 resets, it locks with the slider 9.

[0073] Closing process:

[0074] See Figures 8 - 10 , Figure 3 , the movable arm 12 starts to close under an external force. When it is closed to a corresponding angle, the movable arm 12 drives the swing block 16 to swing through the opening and closing guiding part. Then the swing block 16 drives the transmission mating part 17 to move in the direction of the slider 9, and then compresses the fifth elastic part 14. When the movable arm 12 is closed to a corresponding angle, the elastic acting forces of the movable arm assembly 2 and the slider assembly 6 on the swing block 16 are basically balanced, and the movable arm 12 continues to close to the maximum position under the external force.

[0075] The above is the preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-wear door opening device, comprising a bracket (1) and a movable arm assembly (2), the movable arm assembly (2) being hinged to open and close on the bracket (1), characterized in that: It further includes a wear-resistant member (c), and when the movable arm assembly (2) is hinged to open and close, it acts on the wear-resistant member (c). The movable arm assembly (2) includes a movable arm (12) hinged to open and close on the bracket (1) and an acting member (20) provided at one end of the movable arm (12). When the movable arm (12) is hinged to open and close, the acting member (20) contacts the wear-resistant member (c). The bracket (1) is provided with an elastically movable pressing assembly (3), a locking and releasing assembly (5) and a slider assembly (6). A transmission arm (4) is provided between the locking and releasing assembly (5) and / or the slider assembly (6) and the pressing assembly (3). A transmission assembly (7) is provided between one ends of the slider assembly (6) and the movable arm assembly (2). An unlocking guiding portion is provided between the locking and releasing assembly (5) and the slider assembly (6). An opening and closing guiding portion is provided between the movable arm assembly (2) and the transmission assembly (7). When the door opening device is started, the pressing assembly (3) acts on the locking and releasing assembly (5) by pressing to drive the transmission arm (4), so that the locking and releasing assembly (5) and the slider assembly (6) are unlocked from each other. Furthermore, a part of the slider assembly (6) moves toward the transmission arm (4). The slider assembly (6) drives the pressing assembly (3) to elastically extend out of the bracket (1) through the transmission arm (4), and at the same time, the movable arm assembly (2) elastically rotates and extends out of the bracket (1) along the opening and closing guiding portion. When the movable arm assembly (2) is opened to a corresponding angle, a part of the slider assembly (6) elastically resets, the locking and releasing assembly (5) elastically resets and locks with the slider assembly (6), and the pressing assembly (3) elastically resets and acts on the transmission arm (4) to make the transmission arm (4) reset, and the movable arm assembly (2) disengages from the opening and closing guiding portion of the transmission assembly (7) during the continuous elastic rotation process. When the movable arm assembly (2) is closed, it drives the transmission assembly (7) to act on another part of the slider assembly (6) through the opening and closing guiding portion. When the movable arm assembly (2) is closed to a corresponding angle, the elastic acting forces of the movable arm assembly (2) and the slider assembly (6) acting on the transmission assembly (7) are basically balanced, so that the movable arm assembly (2) produces a hovering effect, and the movable arm assembly (2) continues to close under the action of an external force. The locking and releasing assembly (5) at least includes a locking and releasing member (8), and the slider assembly (6) at least includes a slider (9). The unlocking guiding portion is provided between the locking and releasing member (8) and the slider (9). The locking and releasing member (8) is elastically movable on the bracket (1), and is unlocked or locked with the slider (9) through the unlocking guiding portion during elastic movement. The unlocking guiding portion includes a locking and releasing portion (8.1) provided on the locking and releasing member (8) and a guiding and cooperating portion (9.1) provided on the slider (9). The lock disengaging member (8) is elastically movable on the bracket (1) by the first elastic member (10) so that the lock disengaging portion (8.1) is engaged or disengaged with the guiding and mating portion (9.1); specifically, the lock disengaging portion (8.1) is a limiting block provided on the side of the lock disengaging member (8), and the guiding and mating portion (9.1) is a limiting shaft provided on the slider (9). When the door opening device is not activated, the guiding and mating portion (9.1) and the lock disengaging portion (8.1) are mutually limited and engaged. When the pressing assembly (3) is pressed, the pressing assembly (3) drives the transmission arm (4) to swing, so that the transmission arm (4) pushes the lock disengaging member (8) downward, and further makes the guiding and mating portion (9.1) and the lock disengaging portion (8.1) disengage from each other. At this time, under the elastic force of the fifth elastic member (14), the slider (9) moves in the direction of the transmission arm (4) and drives the transmission arm (4) to swing; when the movable arm assembly (2) is opened to a corresponding angle, the fourth elastic member (15) drives the slider (9) to elastically reset, so that the pressing assembly (3) elastically resets and drives the transmission arm (4) to swing, making the transmission arm (4) reset. At the same time, the first elastic member (10) pushes the lock disengaging member (8) upward, and further makes the guiding and mating portion (9.1) and the lock disengaging portion (8.1) mutually limited and engaged; The pressing assembly (3) at least includes a pressing member (11). The pressing member (11) is elastically movable on the bracket (1) by the second elastic member (18) and acts on the transmission arm (4) during elastic movement. After the pressing member (11) extends out of the bracket (1), when the slider (9) elastically resets, the second elastic member (18) elastically acts on the pressing member (11) to make the pressing member (11) elastically reset.

2. The anti-wear door opening device according to claim 1, characterized in that: The acting member (20) is fixedly arranged on the movable arm (12), and the acting member (20) and the movable arm (12) are made of different materials.

3. The anti-wear door opening device according to claim 1, characterized in that: The acting member (20) is in rolling or sliding contact with the wear-resistant member (c), and the acting member (20) is made of plastic with plasticity.

4. The anti-wear door opening device according to claim 1, characterized in that: The bracket (1) is arranged on the cabinet body (a), and the wear-resistant member (c) is arranged on the door body (b).

5. The anti-wear door opening device according to claim 4, characterized in that: The wear-resistant member (c) is arranged on the door body (b) by snap connection, pasting or fasteners.

6. The anti-wear door opening device according to claim 4, characterized in that: The surface of the wear-resistant member (c) is on the same plane as the inner side surface of the door body (b); alternatively, the wear-resistant member (c) is protruded or recessed on the inner side surface of the door body (b).

7. The anti-wear door opening device according to claim 1, characterized in that: The setting position of the acting member (20) corresponds to that of the wear-resistant member (c), and the acting member (20) moves on the wear-resistant member (c) when the movable arm assembly (2) is hinged and opened and closed.

8. The anti-wear door opening device according to claim 1, wherein: The transmission arm (4) is provided with a first acting end (4.1), a second acting end (4.2) and a third acting end (4.3); When the pressing assembly (3) elastically moves, it drives the transmission arm (4) to move through the first acting end (4.1), and the third acting end (4.3) acts on the lock disengaging assembly (5), so that the lock disengaging assembly (5) is unlocked from the slider assembly (6); or when the pressing assembly (3) elastically moves, it drives the transmission arm (4) to reset through the first acting end (4.1); When the lock-unlock component (5) is unlocked from the slider component (6), the slider component (6) moves elastically and drives the transmission arm (4) to move through the second acting end (4.2), and the transmission arm (4) acts on the pressing component (3) through the first acting end (4.1), thereby causing the pressing component (3) to elastically extend.

9. The anti-wear door opening device according to claim 1, characterized in that: A first elastic member (10) is provided between the lock-unlock component (5) and the bracket (1). The lock-unlock component (5) moves elastically on the bracket (1) through the first elastic member (10), and is unlocked or locked with the slider component (6) through the unlocking guiding portion during elastic movement; a second elastic member (18) is provided between the pressing component (3) and the bracket (1). The pressing component (3) moves elastically on the bracket (1) through the second elastic member (18) and acts on the transmission arm (4) during elastic movement.

10. The anti-wear door opening device according to claim 1, characterized in that: A third elastic member (13) is provided between the movable arm component (2) and the bracket (1). The movable arm component (2) moves elastically on the bracket (1) through the third elastic member (13); a fourth elastic member (15) is provided between the slider component (6) and the bracket (1). The slider component (6) moves elastically on the bracket (1) through the fourth elastic member (15), and when the movable arm component (2) is opened to a corresponding angle, the fourth elastic member (15) elastically acts on the slider component (6) to enable the slider component (6) to elastically reset.

11. The anti-wear door opening device according to claim 1, characterized in that: Linear limit guiding portions are respectively provided on the bracket (1) corresponding to the lock-unlock component (5), the slider component (6) and the pressing component (3). The lock-unlock component (5), the slider component (6) and the pressing component (3) are respectively linearly limited and move on the bracket (1) through the linear limit guiding portions.

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