An automatically and gradually unfolding door opening device

Abstract

The present invention relates to a door opening device, in particular to an automatically and gradually unfolding door opening device. The head of the rebound convex head is exposed outside the notch. The buckle moving part is fixed at the rebound convex head. A fixed buckle part is provided at one end of the rod body of the push rod. A push rod spring is arranged in the push rod spring seat. The movable push block is arranged below the front end of the push rod. The reset movable push block is arranged on the left side of the push rod. The movable push rod is arranged in the movable notch of the machine box. The first air spring and the second air spring are arranged in the machine box. A first shaft rod is provided at the top of the first air spring. A second shaft rod is provided at the top of the second air spring. The first air spring and the second air spring are arranged side by side above the head of the movable push rod. This automatically and gradually unfolding door opening device solves the problems of the traditional door opening device with scattered components and single function, and being unable to fully automatically unfold after bouncing open the cabinet door. The door body gradually automatically closes after closing to a certain angle.

Description

Technical Field

[0001] The present invention relates to a door opening device, and particularly to an automatically and gradually unfolding door opening device. Background Art

[0002] With the improvement of the quality of life, people have certain requirements for the daily use of door cabinets, especially the automation function of door cabinets. Existing door cabinets are usually equipped with movable hinges with dampers and door opening rebounders. Usually, the door cabinet rebounder is pressed to bounce up the door cabinet, and the door cabinet is opened by hand. During the process of closing the door cabinet, the movable hinge of the door cabinet will start to work to close the door cabinet only when it is closed to a certain angle. Since the existing door cabinet devices have relatively complex structures for opening and closing the door, two or more components are required to achieve the actions of closing and opening the door. Moreover, there is no cooperation between them, and the purpose of automatically unfolding the door cabinet after pressing the door cabinet cannot be achieved, and the true automation standard cannot be reached. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatically and gradually unfolding door opening device, which solves the problems of the traditional door opening device with scattered components and single function, and cannot be fully automatically unfolded after bouncing open the door cabinet, and the door body is gradually and automatically closed after being closed to a certain angle.

[0004] To achieve the above object, the present invention provides an automatically and gradually unfolding door opening device, which is composed of a machine box, a movable notch, a rebound convex head, an adjusting pulley, a pressing rod, a button spring, a buckle member, a buckle torsion spring, a buckle pin column, a push rod, a buckle head, a push rod spring, a push rod spring seat, a movable push block member, a movable push block pin column, a movable push block roller, a reset movable push block member, a torsion spring, a reset movable push block pin column, a reset movable push block roller, a first air spring, a second air spring, a first shaft rod, a second shaft rod, a first movable axis, a second movable axis, a fixed shaft rod, a movable push rod, and a push rod roller. The inside of the machine box is a hollow structure. A movable notch is opened at the bottom of the machine box, and a notch for placing the rebound convex head is opened on the right side of the bottom of the machine box. The rebound convex head is embedded in the notch on the right side of the bottom of the machine box, and the head of the rebound convex head is exposed outside the notch. An adjusting pulley is provided on the convex head body of the rebound convex head. A sliding notch for the adjusting pulley is opened on the surface of the machine box, and the sliding notch is located at the position of the adjusting pulley. A thread is provided at one end of the head of the rod body of the pressing rod. A notch for placing the pressing rod is opened in the rebound convex head, and a threaded surface is provided in the notch. One end of the pressing rod with a thread is sleeved into the notch of the rebound convex head. A button spring is sleeved on the rod body of the pressing rod. The rebound convex head and the pressing rod are sleeved and embedded on the support frame inside the machine box. The middle of the buckle member is provided with a buckle pin column, and the buckle pin column is fixed in the machine box. A buckle torsion spring is sleeved on the buckle pin column. The two ends of the buckle member are respectively a buckle head and a buckle movable part, and the buckle movable part is attached to the bottom surface of the rebound convex head. One end of the buckle torsion spring is clamped on the buckle head of the buckle member, and the other end of the buckle torsion spring is buckled on the fixed column inside the machine box. A fixed buckle part is provided on the rod body of the push rod, and a reset landslide is provided on the right side of the fixed buckle part. The fixed buckle part of the push rod and the buckle head of the buckle member are on the same horizontal line. A push rod spring seat is provided on the upper part of the rod body of the push rod, and a push rod spring is provided inside the push rod spring seat. The push rod and the push rod spring seat are sleeved and embedded on the support frame inside the machine box. A top block is provided at the front end of the rod body of the push rod. The movable push block member is arranged below the front end of the push rod. The movable push block member is an L-shaped push block. A movable push block pin column is provided in the middle of the L-shaped corner of the movable push block member, and the movable push block pin column is fixed in the machine box. The head of the movable push block member is connected to the push block connecting part of the push rod. A movable push block roller is provided at the other end of the movable push block member. The reset movable push block member is an L-shaped push block, and the reset movable push block member is arranged on the left side of the push rod. A reset movable push block pin column is provided in the middle of the L-shaped corner of the reset movable push block member, and the reset movable push block pin column is fixed in the machine box. A reset movable push block roller is provided at the end of the reset movable push block member. The torsion spring is sleeved on the reset movable push block pin column. One end of the torsion spring is clamped on the head of the reset movable push block member, and the other end of the torsion spring is buckled on the fixed column inside the machine box. The movable push rod is arranged in the movable notch of the machine box. Movable joint connectors are provided on the left and right sides of the head of the movable push rod. The rod body of the movable push rod is received in the movable notch. A push rod roller is provided at the end of the rod body of the movable push rod. A roller movable notch is provided on the side of the door body, and the push rod roller of the movable push rod is sleeved and fixed in the roller movable notch.The push rod head of the movable push rod is provided with a fixed shaft rod, and the fixed shaft rod is fixed in the machine box. The left and right movable joint connectors of the movable push rod head and the fixed shaft rod form a triangular rotating wheel. The first gas spring and the second gas spring are arranged in the machine box. The first gas spring is provided with a first shaft rod that can move forward and backward. The second gas spring is provided with a second shaft rod that can move forward and backward. The first movable axis is arranged at the head of the first gas spring and fixed in the machine box. The second movable axis is arranged at the head of the second gas spring and fixed in the machine box. The first shaft rod head of the first gas spring is fixed on the movable joint connector on the left side of the movable push rod head. The second shaft rod head sleeve is fixed to the movable joint connecting head on the right side of the movable push rod head, and the rebound convex head is reset by the rebound force of the button spring, and the push rod drives the push block connecting piece and the front end top block to move left, and the top block of the push rod pushes to the side of the reset movable push block piece, so that the reset movable The torsion spring on the reset movable push block component maintains an inward rebound force, and the reset movable push block after being pushed and rolled generates a great torsional elastic force, and the side of the head of the reset movable push block will push the movable push block to move outward. The top block of the push rod causes the push rod to move rightward and reset. The reset landslide of the fixed buckle part on the push rod will slide over the buckle head, causing the buckle head to reset to the fixed buckle part of the push rod. The push rod moves rightward and drives the connected movable push block to reset. The closed door body drives the movable push rod body to move into the movable notch. The movable joint connecting heads on both sides of the left side of the head of the movable push rod are retracted inward, driving the connected first gas spring and the second gas spring to move inward. During the reset process, the thrust of the first shaft of the first gas spring is greater than the thrust of the second shaft of the second gas spring. The first shaft of the first gas spring helps to push the movable push rod to reset.

[0005] Compared with the prior art, the advantages of the present invention are as follows: The inside of the machine box is a hollow structure, and the accessories of the door opening device are placed inside the hollow machine box. An activity slot is opened at the bottom of the machine box, and the activity slot is used for the body of the activity push rod to stretch and move. A slot for placing a rebound convex head is opened on the right side of the bottom of the machine box. The rebound convex head is embedded in the slot on the right side of the bottom of the machine box, and the head of the rebound convex head is exposed outside the slot. When the door body is in the closed state, pressing the door body squeezes the rebound convex head to move back and forth. An adjusting pulley is provided on the convex head body of the rebound convex head. A sliding slot for the adjusting pulley is opened on the surface of the machine box, and the sliding slot is located at the position of the adjusting pulley. A sliding slot is left on the surface of the machine box. The adjusting pulley on the rebound convex head is adjusted through the sliding slot, so that the length of the part of the rebound convex head protruding from the machine box can be adjusted. A thread is provided at one end of the head of the body of the pressing rod. A concave opening for placing the pressing rod is opened in the rebound convex head, and a threaded surface is provided in the concave opening. One end of the pressing rod with a thread is sleeved into the concave opening of the rebound convex head, and the concave opening of the rebound convex head and the thread of the pressing rod are rotated with each other to achieve the purpose of adjusting the rebound convex head. A button spring is sleeved on the body of the pressing rod. The rebound convex head and the pressing rod are nested on the support frame inside the machine box. The button spring can pop the rebound convex head out of the machine box. A snap pin column is provided in the middle of the snap member, and the snap pin column is fixed in the machine box. A snap torsion spring is sleeved on the snap pin column. The two ends of the snap member are respectively a snap head and a snap movable part. The snap movable part is attached to the bottom surface of the rebound convex head. One end of the snap torsion spring is fixed at the snap head of the snap member, and the other end of the snap torsion spring is buckled on the fixed column inside the machine box. The snap torsion spring maintains the pushing force on the snap head. The snap pin column is the movable axis for fixing the snap member. The bottom surface of the rebound convex head drives the snap movable part to move, so that the snap head of the snap member moves up and down. A fixed snap part is provided on the body of the push rod, and a reset slope is provided on the right side of the fixed snap part. The fixed snap part of the push rod is used to hook the snap head of the snap member. The right side of the fixed snap part of the push rod is a slope for facilitating the reset of the snap head. When the snap head of the snap member is reset, the snap head will slide across the slope of the fixed snap of the push rod, making it easy for the snap head to reset to the left of the fixed snap part of the push rod. The fixed snap part of the push rod and the snap head of the snap member are on the same horizontal line. A push rod spring seat is provided at the upper part of the body of the push rod, and a push rod spring is provided inside the push rod spring seat. The push rod and the push rod spring seat are nested on the support frame inside the machine box. The push rod spring maintains the elastic force for pushing the push rod. A top block is provided at the front end of the body of the push rod. A movable push block member is provided below the front end of the push rod. The movable push block member is an L-shaped push block. A movable push block pin column is provided in the middle of the L-shaped corner of the movable push block member, and the movable push block pin column is fixed in the machine box. The head of the movable push block member is connected to the push block connecting member of the push rod. A movable push block roller is provided at the other end of the movable push block member. The movable push block pin column is the movable axis for fixing the movable push block member. The push block connecting member of the push rod drives the movable push block member to move forward, and the other end of the movable push block member expands outwards. The movable push block roller pushes and rolls the body of the activity push rod to move. The reset movable push block member is an L-shaped push block, and the reset movable push block member is provided on the left side of the push rod.The middle part of the L-shaped corner of the reset movable push block is provided with a reset movable push block pin, the reset movable push block pin is fixed in the machine box, the end of the reset movable push block is provided with a reset movable push block roller, the torsion spring is sleeved on the reset movable push block pin, one end of the torsion spring is clamped at the head of the reset movable push block, and the other end of the torsion spring is buckled on the fixed column in the machine box. The reset movable push block pin is used to fix the movable axis of the reset movable push block, and the torsion spring allows the reset movable push block to maintain an inward rebound force, so that the reset movable push block is in a reset thrust, the top block of the push rod head pushes the reset movable push block to move forward, and the other end of the reset movable push block is pushed outward, and the reset movable push block roller pushes the side of the push rod head to move, and the pushed reset movable push block The torsion force of the torsion spring reaches the maximum state, and the top block of the push rod head rebounds, so that the push rod is reset to the right. The movable push rod is arranged in the movable groove of the machine box, and movable joint connecting heads are provided on the left and right sides of the head of the movable push rod. The rod body of the movable push rod is stored in the movable groove, and a push rod roller is provided at the end of the rod body of the movable push rod. A roller movable groove is provided on the side of the door body, and the push rod roller is connected to the movable groove on the side of the door. The push rod roller of the movable push rod is fixed in the roller movable groove, and the push rod head of the movable push rod is provided with a fixed shaft rod, and the fixed shaft rod is fixed in the machine box. The left and right movable joint connecting heads of the movable push rod head and the fixed shaft rod form a triangular rotating wheel with the fixed shaft rod, the first gas spring and the second gas spring are arranged in the machine box, and the first gas spring is provided with a first shaft rod that can move back and forth, and the second gas spring The spring is provided with a second shaft rod that is movable forward and backward, the first movable axis center is arranged on the head of the first gas spring and is fixed in the machine box, the second movable axis center is arranged on the head of the second gas spring and is fixed in the machine box, the first shaft rod head of the first gas spring is fixed on the movable joint connecting head on the left side of the movable push rod head, the second shaft rod head of the second gas spring is fixed on the movable joint connecting head on the right side of the movable push rod head, the first gas spring and the second gas spring are arranged in parallel above the movable push rod head, the first gas spring and the second gas spring maintain the pushing force on the movable push rod head, when the movable push rod is expanded outward, the head of the movable push rod drives the first shaft rod and the second shaft rod to tilt outward, the thrust of the first gas spring and the second gas spring also changes at the same time, and the first shaft rod and the second shaft rod help to move the movable push rod The first spring pushes the first member to move inwardly, and the first spring pushes the first member to move outwardly, thereby releasing the first member from the engagement ring and causing the first member to move outwardly.The rebound convex head is reset by the rebound force of the button spring. The push rod drives the push block connecting piece and the front end top block to move leftward. The top block of the push rod pushes against the side of the reset movable push block piece, causing one end of the reset movable push block roller of the reset movable push block piece to roll outward. The reset movable push block roller pushes the head of the movable push rod to expand outward. The push block connecting piece drives the movable push block roller of the movable push block piece to expand outward. The movable push block roller slides the body of the movable push rod to expand outward. The head of the movable push rod moves outward on both the left and right sides. The shaft rods of the first air spring and the second air spring maintain an outward thrust to assist in pushing out the movable push rod. The torsion spring on the reset movable push block piece maintains an inward resilience force. After being pushed and rolled, the reset movable push block generates a great torsional resilience force. The side of the head of the reset movable push block will squeeze the top block of the movable push rod, causing the push rod to move rightward for reset. The reset landslide of the fixed buckle part on the push rod will slide over the buckle head, causing the buckle head to reset onto the fixed buckle part of the push rod. The push rod moves rightward to drive the connected movable push block piece to reset. The closing door body drives the body of the movable push rod to move into the movable notch. The movable joint connecting heads on both the left and right sides of the head of the movable push rod retract inward, driving the connected first air spring and second air spring to move inward. During the reset process, the thrust of the first shaft rod of the first air spring is greater than the thrust of the second shaft rod of the second air spring. The first shaft rod of the first air spring assists in pushing the movable push rod to reset. When the movable push block is in the expanded state, the reset movable push block will push the push rod to the reset state. When pushing the body of the movable push rod to close, the movable joint connecting heads on both the left and right sides of the head of the movable push rod will move, driving the first air spring and the second air spring to move inward. At the same time, the first shaft rod of the first air spring pushes outward, assisting in pressing the head of the movable push rod downward to help the movable push rod reset into the movable notch. It achieves pressing the rebound convex head to pop out the movable push rod to automatically pop open the door body and expand the door body to a larger angle. When closing, when the door body is closed to the corresponding angle, the first shaft rod of the first air spring at the head of the movable push rod will assist in pushing the movable push rod into the movable notch. This automatically and gradually expanding door opening device solves the problems of the traditional door opening device with scattered components and single function, and being unable to fully automatically expand after popping open the cabinet door. The door body gradually automatically closes after being closed to a certain angle, and has the characteristics of convenient installation, simplicity, and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention will be further described below in conjunction with the drawings and embodiments.

[0007] Figure 1 It is a schematic structural diagram of the door body installed for the present invention.

[0008] Figure 2 It is a schematic structural diagram of the present invention.

[0009] Figure 3 It is a schematic internal structural diagram of the present invention.

[0010] Figure 4Schematic diagram of the internal structure expansion of the present invention.

[0011] Figure 5 Schematic diagram of the internal structure expansion process of the present invention.

[0012] Figure 6 Schematic diagram of the internal structure expansion process of the present invention.

[0013] Figure 7 Schematic diagram of the movement of the first air spring and the second air spring in the internal structure of the present invention.

[0014] Figure 8 Schematic diagram of the expansion of the movable push rod in the internal structure of the present invention.

[0015] Figure 9 Schematic diagram of the reset state of the reset movable push block in the internal structure of the present invention.

[0016] Figure 10 Explosion structure schematic diagram of the present invention.

[0017] Figure 11 Schematic diagram of the reset movable push block pushing the movable push rod of the present invention.

[0018] Figure 12 Schematic diagram of the reset movable push block pushing the movable push rod of the present invention.

[0019] Figure 13 Schematic diagram of the fully expanded movable push rod of the present invention.

[0020] Figure 14 Schematic diagram of the adjusting pulley adjusting the height of the rebound convex head of the present invention.

[0021] Figure 15 Schematic diagram of the reset movable push block pushing the movable push rod head of the present invention.

[0022] Figure 1 Among them: machine box 1, movable slot 2, rebound convex head 3.

[0023] Figure 2 Among them: adjusting pulley 4, movable push rod 28, push rod roller 29.

[0024] Figure 3 Among them: pressing rod 5, button spring 6, buckle part 7, buckle torsion spring 8, buckle pin 9, push rod 10, buckle head 11, push rod spring 12, push rod spring seat 13, movable push block 14, movable push block pin 15, movable push block roller 16, reset movable push block 17, torsion spring 18, reset movable push block roller 20, first air spring 21, second air spring 22, first shaft rod 23, second shaft rod 24, first movable axis 25, second movable axis 26, fixed shaft rod 27.

[0025] Figure 10 Middle: Reset the movable push block pin 19. Specific implementation mode

[0026] An automatic step-by-step unfolding door opening device of the present invention is composed of a machine box 1, a movable notch 2, a rebound convex head 3, an adjusting pulley 4, a pressing rod 5, a button spring 6, a buckle member 7, a buckle torsion spring 8, a buckle pin 9, a push rod 10, a buckle head 11, a push rod spring 12, a push rod spring seat 13, a movable push block member 14, a movable push block pin 15, a movable push block roller 16, a reset movable push block member 17, a torsion spring 18, a reset movable push block pin 19, a reset movable push block roller 20, a first gas spring 21, a second gas spring 22, a first shaft rod 23, a second shaft rod 24, a first movable axis 25, a second movable axis 26, a fixed shaft rod 27, a movable push rod 28, and a push rod roller 29. The machine box 1 has a hollow structure, and the accessories of the door opening device are placed in the hollow machine box 1. A movable notch 2 is opened at the bottom of the machine box 1, and the movable notch 2 is used for the rod body of the movable push rod 28 to stretch and move. A notch for placing the rebound convex head 3 is opened on the right side of the bottom of the machine box 1. The rebound convex head 3 is embedded in the notch on the right side of the bottom of the machine box 1, and the head of the rebound convex head 3 is exposed outside the notch. When the door body is in the closed state, pressing the door body squeezes the rebound convex head 3 to move back and forth. An adjusting pulley 4 is provided on the convex head body of the rebound convex head 3. A sliding notch for the adjusting pulley 4 is opened on the surface of the machine box 1, and the sliding notch is located at the position of the adjusting pulley 4. A sliding notch is left on the surface of the machine box 1. By adjusting the adjusting pulley 4 on the rebound convex head 3 through the sliding notch, the length of the part of the rebound convex head 3 protruding from the machine box 1 can be adjusted. The rod body head end of the pressing rod 5 is provided with a thread, and a concave notch for placing the pressing rod 5 is opened in the rebound convex head 3, and a threaded surface is provided in the concave notch. One end of the pressing rod 5 with a thread is sleeved into the concave notch of the rebound convex head 3, and the concave notch of the rebound convex head 3 and the thread of the pressing rod 5 are rotated with each other to achieve the purpose of adjusting the rebound convex head 3. A button spring 6 is sleeved on the rod body of the pressing rod 5. The rebound convex head 3 and the pressing rod 5 are sleeved and embedded on the support frame in the machine box 1. The button spring 6 can pop the rebound convex head 3 out of the machine box 1. A buckle pin 9 is provided in the middle of the buckle member 7, and the buckle pin 9 is fixed in the machine box 1. A buckle torsion spring 8 is sleeved on the buckle pin 9. The two ends of the buckle member 7 are respectively a buckle head 11 and a buckle movable part, and the buckle movable part is attached to the bottom surface of the rebound convex head 3. One end of the buckle torsion spring 8 is clamped at the buckle head 11 part of the buckle member 7, and the other end of the buckle torsion spring 8 is buckled on the fixed column in the machine box 1. The buckle torsion spring 8 maintains the pushing force on the buckle head 11. The buckle pin 9 is the movable axis for fixing the buckle member 7. The bottom surface of the rebound convex head 3 drives the buckle movable part to move, so that the buckle head 11 of the buckle member 7 moves up and down. A fixed buckle part is provided on the rod body of the push rod 10, and a reset slope is provided on the right side of the fixed buckle part. The fixed buckle part of the push rod 10 is used to hook the buckle head 11 of the buckle member 7. The right side of the fixed buckle part of the push rod 10 is a slope for facilitating the reset of the buckle head 11. When the buckle head 11 of the buckle member 7 is in the reset process, the buckle head 11 will slide across the slope of the fixed buckle of the push rod 10, making it easy for the buckle head 11 to reset to the left of the fixed buckle part of the push rod 10.The fixed buckle part of the push rod 10 and the buckle head 11 of the buckle part 7 are kept on the same horizontal line. There is a push rod spring seat 13 on the upper part of the push rod 10. A push rod spring 12 is arranged in the push rod spring seat 13. The push rod 10 and the push rod spring seat 13 are sleeved on the support frame in the machine box 1. The push rod spring 12 maintains the elastic force to push the push rod 10. There is a top block at the front end of the push rod 10. The movable push block part 14 is arranged below the front end of the push rod 10. The movable push block part 14 is an L-shaped push block. There is a movable push block pin 15 in the middle of the L-shaped corner of the movable push block part 14. The movable push block pin 15 is fixed in the machine box 1. The head of the movable push block part 14 is connected to the push block connecting part of the push rod 10. There is a movable push block roller 16 at the other end of the movable push block part 14. The movable push block pin 15 is the movable axis for fixing the movable push block part 14. The push block connecting part of the push rod 10 drives the movable push block part 14 to move forward. The other end of the movable push block part 14 expands outwards. The movable push block roller 16 pushes and rolls the rod body of the movable push rod 28 to move. The reset movable push block part 17 is an L-shaped push block. The reset movable push block part 17 is arranged on the left side of the push rod 10. There is a reset movable push block pin 19 in the middle of the L-shaped corner of the reset movable push block part 17. The reset movable push block pin 19 is fixed in the machine box 1. There is a reset movable push block roller 20 at the end of the reset movable push block part 17. The torsion spring 18 is sleeved on the reset movable push block pin 19. One end of the torsion spring 18 is clamped at the head of the reset movable push block part 17. The other end of the torsion spring 18 is buckled on the fixed column in the machine box 1. The reset movable push block pin 19 is the movable axis for fixing the reset movable push block part 17. The torsion spring 18 makes the reset movable push block part 17 maintain an inward resilience force, so that the reset movable push block part 17 is in a reset thrust. The top block at the head of the push rod 10 pushes the reset movable push block part 17 to move forward. The other end of the reset movable push block part 17 expands outwards. The reset movable push block roller 20 pushes and rolls the side of the head of the movable push rod 28 to move. The pushed reset movable push block part 17 makes the torsion of the torsion spring 18 reach the maximum state, and rebounds the top block at the head of the push rod 10, so that the push rod 10 moves to the right for reset. The movable push rod 28 is arranged in the movable slot 2 of the machine box 1. There are movable joint connectors on the left and right sides of the head of the movable push rod 28. The rod body of the movable push rod 28 is received in the movable slot 2. There is a push rod roller 29 at the end of the rod body of the movable push rod 28. There is a roller movable slot on the side of the door body. The push rod roller 29 of the movable push rod 28 is connected to the movable slot on the side of the door. The push rod roller 29 of the movable push rod 28 is sleeved and fixed in the roller movable slot. The push rod 10 head of the movable push rod 28 is provided with a fixed shaft rod 27. The fixed shaft rod 27 is fixed in the machine box 1. The left and right movable joint connectors at the head of the movable push rod 28 and the fixed shaft rod 27 form a triangular runner. The first air spring 21 and the second air spring 22 are arranged in the machine box 1. The first air spring 21 is provided with a first shaft rod 23 that moves back and forth. The second air spring 22 is provided with a second shaft rod 24 that moves back and forth. The first movable axis 25 is arranged at the head of the first air spring 21 and is fixed in the machine box 1.The second movable axis 26 is arranged on the head of the second gas spring 22 and fixed in the machine box 1, the rod head of the first shaft rod 23 of the first gas spring 21 is fixed on the movable joint connecting head on the left side of the head of the movable push rod 28, and the rod head of the second shaft rod 24 of the second gas spring 22 is fixed on the movable joint connecting head on the right side of the head of the movable push rod 28. The first gas spring 21 and the second gas spring 22 are arranged in parallel above the head of the movable push rod 28. The first gas spring 21 and the second gas spring 22 maintain the pushing force on the head of the movable push rod 28. When the movable push rod 28 is expanded outward, the rod head of the movable push rod 28 drives the first shaft rod 23 and the second shaft rod 24 to tilt outward, and the thrust of the first gas spring 21 and the second gas spring 22 also changes at the same time. The first shaft rod 23 and the second shaft rod 24 help The force pushes the rod head of the movable push rod 28 out. When the movable push rod 28 is retracted, the movable joint connector on the left side of the rod head of the movable push rod 28 drives the first shaft rod 23 of the first gas spring 21 to move inward. The accumulated elastic force of the first gas spring 21 quickly pops out the first shaft rod 23 and drives the movable push rod 28 to reset. The second shaft rod 24 of the second gas spring 22 is squeezed and contracted by the force, so as to achieve the purpose of pushing the movable push rod 28 when it is expanded outward. When the rod body of the movable push rod 28 is retracted, the first shaft rod 23 of the first gas spring 21 assists in closing. The rebound convex head 3 is pressed to drive the pressing rod 5 to press the button spring 6 downward. The bottom surface of the rebound convex head 3 moves downward and presses the buckle movable part. The buckle movable part of the buckle 7 is tilted up, driving the buckle head 11 to move downward and pop out the push rod 1. 0, the push rod spring 12 of the push rod 10 generates a leftward elastic force, the buckle head 11 of the buckle member 7 is reset to the reset slope of the push rod 10, the rebound protrusion 3 is reset by the rebound force of the button spring 6, the push rod 10 drives the push block connecting member and the front end top block to move to the left, the top block of the push rod 10 pushes to the side of the reset movable push block member 17, so that one end of the reset movable push block roller 20 of the reset movable push block member 17 rolls outward, the reset movable push block roller 20 pushes the head of the movable push rod 28 to push outward, the push block connecting member drives the movable push block roller 16 of the movable push block member 14 to push outward, the movable push block roller 16 pushes the rod body of the movable push rod 28 to expand outward, the left and right sides of the head of the movable push rod 28 move outward, the first gas spring 21 and the second gas spring 22 The shaft maintains an outward thrust to help push out the movable push rod 28. The torsion spring 18 on the reset movable push block 17 maintains an inward resilience. The reset movable push block after being pushed and rolled generates a great torsional elastic force. The side of the head of the reset movable push block will push the top block of the movable push rod 28, so that the push rod 10 moves rightward and resets. The reset landslide of the fixed buckle part on the push rod 10 will slide over the buckle head 11, so that the buckle head 11 is reset to the fixed buckle part of the push rod 10. The push rod 10 moves rightward and drives the connected movable push block 14 to reset. The closed door body drives the rod body of the movable push rod 28 to move into the movable notch 2. The movable joint connectors on both sides of the left side of the head of the movable push rod 28 are retracted inward, driving the connected first gas spring 21 and the second gas spring 22 to move inward.During the reset process, the thrust of the first shaft rod 23 of the first gas spring 21 is greater than the thrust of the second shaft rod 24 of the second gas spring 22. The first shaft rod 23 of the first gas spring 21 assists in pushing the movable push rod 28 to reset. When the movable push block is in the unfolded state, resetting the movable push block will push the push rod 10 to the reset state. When the body of the movable push rod 28 is closed, the movable joint connectors on both sides of the left side of the head of the movable push rod 28 will move, driving the first gas spring 21 and the second gas spring 22 to move inward. At the same time, the first shaft rod 23 of the first gas spring 21 pushes outward, assisting the head of the movable push rod 28 to press downward, helping the movable push rod 28 to reset to the movable notch 2, so as to press the rebound convex head 3 to pop out the movable push rod 28 to automatically open the door body, and expand the door body to a larger angle. When closing, when the door body is closed to the corresponding angle, the first shaft rod 23 of the first gas spring 21 at the head of the movable push rod 28 will assist in pushing the movable push rod 28 into the movable notch 2.,

[0027] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All equivalent controls or modifications made according to the spirit of the main technical solution of the present invention should be covered within the protection scope of the present invention.,

Claims

1. An automatically and gradually unfolding door opening device, comprising a machine box (1), a movable notch (2), a rebounding convex head (3), an adjusting pulley (4), a pressing rod (5), a button spring (6), a buckle member (7), a buckle torsion spring (8), a buckle pin (9), a push rod (10), a buckle head (11), a push rod spring (12), a push rod spring seat (13), a movable push block member (14), a movable push block pin (15), a movable push block roller (16), a reset movable push block member (17), a torsion spring (18), a reset movable push block pin (19), a reset movable push block roller (20), a first gas spring (21), a second gas spring (22), a first shaft rod (23), a second shaft rod (24), a first movable axis (25), a second movable axis (26), a fixed shaft rod (27), a movable push rod (28), and a push rod roller (29), characterized in that: The inside of the machine box (1) is a hollow structure. An activity notch (2) is opened at the bottom of the machine box (1). A notch for placing a rebound convex head (3) is opened on the right side of the bottom of the machine box (1). The rebound convex head (3) is embedded in the notch on the right side of the bottom of the machine box (1). A button spring (6) is sleeved on the rod body of the pressing rod (5). The rebound convex head (3) and the pressing rod (5) are sleeved and embedded on the support frame inside the machine box (1). A snap pin column (9) is provided in the middle of the snap member (7). The snap pin column (9) is fixed in the machine box (1). A snap torsion spring (8) is sleeved on the snap pin column (9). The two ends of the snap member (7) are respectively a snap head (11) and a snap activity part. The snap activity part is attached to the bottom surface of the rebound convex head (3). One end of the snap torsion spring (8) is clamped at the snap head (11) part on the snap member (7). The other end of the snap torsion spring (8) is buckled on the fixed column inside the machine box (1). A fixed snap part is provided on the rod body of the push rod (10), and a reset landslide is provided on the right side of the fixed snap part. The fixed snap part of the push rod (10) and the snap head (11) of the snap member (7) are on the same horizontal line. A push rod spring seat (13) is provided at the upper part of the rod body of the push rod (10). A push rod spring (12) is provided inside the push rod spring seat (13). The push rod (10) and the push rod spring seat (13) are sleeved and embedded on the support frame inside the machine box (1). A top block is provided at the front end of the rod body of the push rod (10). The movable push block member (14) is arranged below the front end of the push rod (10). The movable push block member (14) is an L-shaped push block. A movable push block pin column (15) is provided in the middle of the L-shaped corner of the movable push block member (14). The movable push block pin column (15) is fixed in the machine box (1). The head of the movable push block member (14) is connected to the push block connecting part of the push rod (10). A movable push block roller (16) is provided at the other end of the movable push block member (14). The reset movable push block member (17) is an L-shaped push block. The reset movable push block member (17) is arranged on the left side of the push rod (10). A reset movable push block pin column (19) is provided in the middle of the L-shaped corner of the reset movable push block member (17). The reset movable push block pin column (19) is fixed in the machine box (1). A reset movable push block roller (20) is provided at the end of the reset movable push block member (17). A torsion spring (18) is sleeved on the reset movable push block pin column (19). One end of the torsion spring (18) is clamped at the head of the reset movable push block member (17). The other end of the torsion spring (18) is buckled and fixed on the fixed column inside the machine box (1).The movable push rod (28) is arranged in the movable notch (2) of the machine box (1). Movable joint connectors are arranged on the left and right sides of the head of the movable push rod (28). The rod body of the movable push rod (28) is received in the movable notch (2). A fixed shaft rod (27) is arranged on the head of the push rod (10) of the movable push rod (28), and the fixed shaft rod (27) is fixed in the machine box (1). The left and right movable joint connectors at the head of the movable push rod (28) and the fixed shaft rod (27) form a triangular runner. The first air spring (21) and the second air spring (22) are arranged in the machine box (1). A first shaft rod (23) that moves back and forth is arranged on the first air spring (21), and a second shaft rod (24) that moves back and forth is arranged on the second air spring (22). A first movable axis center (25) is arranged at the head of the first air spring (21) and is fixed in the machine box (1). A second movable axis center (26) is arranged at the head of the second air spring (22) and is fixed in the machine box (1). The head of the first shaft rod (23) of the first air spring (21) is sleeved and fixed on the movable joint connector on the left side of the head of the movable push rod (28), and the head of the second shaft rod (24) of the second air spring (22) is sleeved and fixed on the movable joint connector on the right side of the head of the movable push rod (28);, The head of the rebound convex head (3) is exposed outside the notch. An adjusting pulley (4) is provided on the convex head body of the rebound convex head (3). A sliding notch for the adjusting pulley (4) is formed on the surface of the machine box (1). The sliding notch is located at the position of the adjusting pulley (4). The head end of the rod body of the pressing rod (5) is provided with a thread. A notch for placing the pressing rod (5) is formed in the rebound convex head (3). A threaded surface is provided in the notch. One end of the pressing rod (5) with a thread is sleeved into the notch of the rebound convex head (3). A push rod roller (29) is provided at the end of the rod body of the movable push rod (28). A roller movable groove is provided on the side surface of the door body. The push rod roller (29) of the movable push rod (28) is fixedly sleeved in the roller movable groove.

2. The automatic step-by-step unfolding door opening device according to claim 1, wherein: Pressing the rebound convex head (3) drives the pressing rod (5) to press down the button spring (6). The bottom surface of the rebound convex head (3) moves downward to press the buckle movable part. The buckle movable part of the buckle piece (7) warps up to drive the buckle head (11) to move downward to pop out the fixed buckle of the push rod (10). The push rod spring (12) of the push rod (10) generates an elastic force to the left. The buckle head (11) of the buckle piece (7) resets to the reset landslide of the push rod (10). The rebound convex head (3) resets under the rebounding force of the button spring (6). The push rod (10) drives the push block connecting piece and the front end top block to move to the left. The top block of the push rod (10) pushes against the side surface of the reset movable push block piece (17), causing one end of the reset movable push block roller (20) of the reset movable push block piece (17) to roll outwards. The reset movable push block roller (20) pushes and rolls the head of the movable push rod (28) to expand outwards. The push block connecting piece drives the movable push block roller (16) of the movable push block piece (14) to expand outwards. The movable push block roller (16) pushes and slides the rod body of the movable push rod (28) to expand outwards. The head of the movable push rod (28) moves outwards on both the left and right sides. The shaft rods of the first air spring (21) and the second air spring (22) maintain an outward thrust to assist in pushing out the movable push rod (28).

3. An automatically and gradually unfolding door opening device according to any one of claims 1 or 2, characterized in that: The torsion spring (18) on the reset movable push block piece (17) maintains an inward restoring force. The reset movable push block after being pushed and rolled generates a great torsional elastic force. The side surface of the head of the reset movable push block will push against the top block of the movable push rod (28), causing the push rod (10) to move to the right for reset. The reset landslide of the fixed buckle part on the push rod (10) will slide over the buckle head (11), causing the buckle head (11) to reset to the fixed buckle part of the push rod (10). The push rod (10) moves to the right to drive the connected movable push block piece (14) to reset. Closing the door body drives the rod body of the movable push rod (28) to move into the movable notch (2). The movable joint connectors on both sides of the left side of the head of the movable push rod (28) retract inwards, driving the connected first air spring (21) and second air spring (22) to move inwards. During the reset process, the thrust of the first shaft rod (23) of the first air spring (21) is greater than the thrust of the second shaft rod (24) of the second air spring (22). The first shaft rod (23) of the first air spring (21) assists in pushing the movable push rod (28) to reset.

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