A door opening device

Abstract

A door opening device includes a bracket and a movable arm assembly elastically and movably arranged on the bracket, a pressing assembly, a locking assembly and a moving assembly, the movable arm assembly is elastically hinged to open and close on the bracket, a swing arm is provided between the moving assembly and the pressing assembly, and a first elastic member is provided between the locking assembly and the moving assembly; when the movable arm assembly is closed, one end of the first elastic member elastically acts on the locking assembly, and the other end of the first elastic member elastically acts on the moving assembly, and during the opening and closing process of the movable arm assembly, the moving assembly maintains transmission contact with the swing arm under the action of elastic force; and when the locking assembly and the moving assembly are unlocked, the pressing assembly drives one end of the moving assembly to move through the swing arm, and the locking assembly is separated and unlocked from the moving assembly through the first elastic member. The present invention provides a first elastic member, unlocks the locking assembly and the moving assembly through the first elastic member, and compensates for the transmission gap between the swing arm and the moving assembly, so that the door opening device can achieve a silent effect when opening and closing.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture, in particular to a door opening device. Background Art

[0002] Chinese patent application No. 2022219458187 describes a door opener, comprising a bracket, on which are provided an elastically movable arm assembly, a pressing assembly, a locking assembly and a moving assembly; the movable arm assembly is hingedly opened and closed on the bracket; a swing arm is provided between the locking assembly and / or the moving assembly and the pressing assembly; a transmission assembly is provided between one end of the moving assembly and the movable arm assembly; an unlocking guide portion is provided between the locking assembly and the moving assembly; and an opening and closing guide portion is provided between the movable arm assembly and the transmission assembly. When the locking assembly is unlocked, the third action end of the swing arm is driven by the second action end to push the locking assembly downward, thereby unlocking the locking assembly and the moving assembly. After unlocking, the moving part of the moving assembly moves in the direction of the swing arm, and the moving part drives (pushes) the swing arm to move through the second action end, and the swing arm acts on the pressing assembly through the first action end, so that the pressing assembly elastically extends out of the bracket; since the third action end of the swing arm is provided for unlocking the locking assembly and the moving assembly, there must be a transmission gap between the second action end of the swing arm and the moving part (if there is no transmission gap between the two, the third action end of the swing arm cannot push the locking assembly downward when the pressing assembly is pressed). Due to the existence of the transmission gap, after the pressing assembly is pressed, the moving part will collide with the second action end when they come into contact, and then the moving part pushes the swing arm to move through the second action end. When the moving part collides with the second action end, a loud noise will be generated, which will cause a loud noise when the user uses the door opener to open the door, affecting the user's experience.

[0003] Therefore, further improvements are necessary. Summary of the Invention

[0004] The purpose of the present invention is to provide a door opening device with simple structure, low noise, good user experience and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A door opening device designed for this purpose includes a bracket and a movable arm assembly elastically and movably arranged on the bracket, a pressing assembly, a locking assembly and a moving assembly. The movable arm assembly is elastically hinged to open and close on the bracket, and a swing arm is provided between the moving assembly and the pressing assembly. The device is characterized in that a first elastic member is provided between the locking assembly and the moving assembly.

[0006] When the movable arm assembly is closed, one end of the first elastic member elastically acts on the locking assembly, and the other end of the first elastic member elastically acts on the moving assembly. During the opening and closing process of the movable arm assembly, the moving assembly maintains transmission contact with the swing arm under the action of elastic force; and when the locking assembly is unlocked from the moving assembly, the pressing assembly drives one end of the moving assembly to move through the swing arm, and the locking assembly is separated from the moving assembly by the first elastic member and unlocked.

[0007] During the unlocking or locking process, the first elastic member acts on the locking assembly to compensate for the transmission gap between the swing arm and the moving assembly.

[0008] The swing arm is hinged on the bracket and includes a first action end and a second action end;

[0009] When the pressing component is pressed, the swing arm is driven to move through the first action end, and the swing arm acts on the moving component through the second action end to move one end of the moving component, and the locking component is unlocked from the moving component, and one end of the moving component acts on the swing arm through the second action end, so that the swing arm drives the pressing component to elastically extend out of the bracket through the first action end, and the movable arm component and the pressing component are elastically extended out of the bracket at the same time.

[0010] A transmission assembly is provided between one end of the moving assembly and the movable arm assembly;

[0011] When the movable arm assembly is opened to the corresponding angle, the other end of the moving assembly moves and acts on the transmission assembly, the other end of the first elastic member disengages from the moving assembly, the locking assembly elastically resets and locks with the moving assembly, the pressing assembly elastically resets and acts on the swing arm to reset the swing arm, and the movable arm assembly disengages from the transmission assembly while continuing to open.

[0012] An opening and closing guide portion is provided between the movable arm assembly and the transmission assembly;

[0013] When the movable arm assembly is closed, the transmission assembly is driven by the opening and closing guide part to act on the elastic moving assembly, so that the moving assembly and the locking assembly are pre-locked. When the movable arm assembly is closed to a corresponding angle, the moving assembly acts on the first elastic member and drives the first elastic member to act on the locking assembly. When the movable arm assembly is closed to a corresponding angle, the elastic forces of the movable arm assembly and the moving assembly 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 external force.

[0014] The locking assembly includes a locking member and a second elastic member arranged between the locking member and the bracket, and the moving assembly includes at least a moving member, and a pre-locking portion is arranged between the locking member and the moving member;

[0015] The locking member is elastically movable on the bracket through the second elastic member, and is separated from the moving member through the pre-locking portion to be unlocked or pre-locked during the elastic movement.

[0016] The pressing assembly includes a pressing member and a third elastic member arranged between the pressing member and the bracket;

[0017] The pressing piece is elastically movable on the bracket through the third elastic piece, and acts on the swing arm through the first action end when elastically movable, so that the swing arm drives one end of the moving component to move through the second action end; or, when the pressing piece is elastically movable, it drives the swing arm to reset through the first action end.

[0018] The movable arm assembly includes a movable arm and a fourth elastic member disposed between the movable arm and the bracket, the movable arm elastically moving on the bracket via the fourth elastic member, the movable assembly further includes a fifth elastic member, a transmission matching member and a sixth elastic member disposed between the movable member and the bracket, the movable assembly elastically moving on the bracket via the sixth elastic member, the movable member elastically connected to the transmission matching member via the fifth elastic member, and the transmission matching member transmission-matched with the transmission assembly;

[0019] When the locking member is unlocked from the movable member, the fifth elastic member elastically acts on the movable member to move the movable member toward the swing arm, thereby making the elastic force of the movable arm assembly on the transmission assembly greater than the elastic force of the movable assembly on the transmission assembly, and then the elastic force of the fourth elastic member causes the movable arm to elastically extend outside the bracket;

[0020] When the movable arm assembly is opened to a corresponding angle, the sixth elastic member elastically acts on the moving member to move the moving assembly toward the direction of the transmission assembly.

[0021] The transmission assembly at least includes a swing block, the opening and closing guide portion is arranged between the movable arm and the swing block, and the swing block and the transmission matching member cooperate with each other;

[0022] When the movable arm is closed, the opening and closing guide part drives the swing block to swing. When the swing block swings, it acts on the transmission matching part to make the transmission matching part move in the direction of the moving part, and acts on the moving part through the fifth elastic part to pre-lock the moving part with the locking part. When the movable arm is closed to the corresponding angle, the transmission matching part moves and drives the first elastic part to elastically act on the locking part.

[0023] The bracket is provided with linear limiting guide parts corresponding to the locking part, the moving part and the pressing part respectively, and the locking part, the moving part and the pressing part are linearly limited and movable on the bracket through the linear limiting guide parts.

[0024] The present invention has the following beneficial effects:

[0025] 1. By setting a first elastic member, the locking assembly and the moving assembly are unlocked through the first elastic member and the swing arm, replacing the original structure of unlocking the locking assembly and the moving assembly through the swing arm. Under the action of the pressing assembly, the swing arm maintains transmission contact with the elastically movable moving assembly, that is, there is no transmission gap between the two. During the entire opening and closing process of the movable arm assembly, the swing arm and the moving assembly always maintain transmission contact, no collision occurs, and thus no sound is generated, achieving a silent effect and improving the user experience.

[0026] 2. After pressing the pressing component of the door opening device, the movable arm component can automatically open completely, ensuring that the user can complete the opening of the movable arm component with the simplest and most convenient operation, thereby improving the user experience.

[0027] 3. When the movable arm assembly is opened to the corresponding angle, the pressing assembly, locking assembly, moving assembly and swing arm will automatically reset to ensure that after the movable arm assembly is closed, the movable arm assembly can automatically open when the pressing assembly is pressed next time.

[0028] 4. When the movable arm assembly is closed to the corresponding angle, the elastic forces of the movable arm assembly and the moving assembly on the transmission assembly are basically balanced, so that the movable arm assembly can produce a hovering effect (the movable arm assembly can hover at any angle when it continues to close). At this time, the movable arm assembly can be continued to be closed with very little force. When the door opening device is applied to furniture, a hinge with greater elastic force can be installed between the furniture cabinet and the door body. When the movable arm assembly produces a hovering effect, the movable arm assembly (i.e., the door body) can be automatically closed through the hinge. At this time, the user does not need to push the door body, which simplifies the user's door closing operation and improves the user experience.

[0029] 5. When the door opening device is used on furniture, the movable arm assembly does not need to be installed with the door body of the furniture. It is only necessary to fix the bracket on the cabinet body of the furniture. This can simplify the installation and disassembly of the door opening device and improve the assembly efficiency of the door opening device.

[0030] 6. Placing the movable arm assembly, pressing assembly, locking assembly, moving assembly, swing arm and transmission assembly on the bracket can simplify the overall structure of the door opening device, reduce the number of components, improve the compactness of the connection between the components, reduce the volume of the door opening device, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1-Figure 4 Schematic diagram of the opening action process of the door opening device in one embodiment of the present invention.

[0032] Figure 5-Figure 7 Schematic diagram of the closing action process of the door opening device in one embodiment of the present invention.

[0033] Figure 8 It is a cross-sectional view of a door opening device in one embodiment of the present invention.

[0034] Figure 9 Schematic diagram of the internal structure of a door opening device in one embodiment of the present invention.

[0035] Figure 10 Schematic diagram of the exploded structure of a door opening device in one embodiment of the present invention.

[0036] Figure 11 Schematic diagram of the overall structure of furniture in one embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] See also Figures 1-11 The door opening device includes a bracket 1 and a movable arm assembly 2 elastically arranged on the bracket 1, a pressing assembly 3, a locking assembly 5 and a moving assembly 6. The movable arm assembly 2 is elastically hinged to open and close on the bracket 1. A swing arm 4 is provided between the moving assembly 6 and the pressing assembly 3. A first elastic member 20 is provided between the locking assembly 5 and the moving assembly 6. The first elastic member 20 is a torsion spring.

[0039] When the movable arm assembly 2 is closed, one end of the first elastic member 20 elastically acts on the locking assembly 5, and the other end of the first elastic member 20 elastically acts on the moving assembly 6. During the opening and closing process of the movable arm assembly 2, the moving assembly 6 maintains transmission contact with the swing arm 4 under the action of the elastic force; and when the locking assembly 5 is unlocked from the moving assembly 6, the pressing assembly 3 drives one end of the moving assembly 6 to move toward the direction of the transmission assembly 7 through the swing arm 4, and the locking assembly 5 is separated from the moving assembly 6 by the first elastic member 20 and unlocked.

[0040] During the unlocking or locking process, the locking assembly 5 and the moving assembly 6 act on the locking assembly 5 through the first elastic member 20 to compensate for the transmission gap between the swing arm 4 and the moving assembly 6, that is, the locking assembly 5 and the moving assembly 6 are unlocked by the first elastic member 20, and the swing arm 4 maintains transmission contact with the elastically movable moving assembly 6 under the action of the pressing assembly 3, so that there is no transmission gap between the swing arm 4 and the moving assembly 6.

[0041] The swing arm 4 is hinged on the bracket 1 and includes a first active end 4.1 and a second active end 4.2;

[0042] When the pressing component 3 is pressed, the swing arm 4 is driven to move through the first action end 4.1, and the swing arm 4 acts on the moving component 6 through the second action end 4.2, so that the moving part 9 at one end of the moving component 6 moves in the direction of the transmission component 7, thereby unlocking the locking component 5 and the moving component 6. After unlocking, the locking component 5 moves downward, and one end of the moving component 6 moves in the direction of the swing arm 4 under the action of elastic force, and one end of the moving component 6 acts on the swing arm 4 through the second action end 4.2, so that the swing arm 4 drives the pressing component 3 to elastically extend out of the bracket 1 through the first action end 4.1, and the movable arm component 2 and the pressing component 3 are elastically extended out of the bracket 1 at the same time under the action of elastic force.

[0043] A transmission assembly 7 is provided between one end of the moving assembly 6 and the movable arm assembly 2;

[0044] When the movable arm assembly 2 is opened to the corresponding angle, the other end of the moving assembly 6 moves and acts on the transmission assembly 7, and the other end of the first elastic member 20 disengages from the moving assembly 6. At this time, the first elastic member 20 does not generate any force on the locking assembly 5. The locking assembly 5 elastically resets and locks with the moving assembly 6. The pressing assembly 3 elastically resets and acts on the swing arm 4 to reset the swing arm 4, and the movable arm assembly 2 disengages from the transmission assembly 7 while continuing to open.

[0045] An opening and closing guide is provided between the movable arm assembly 2 and the transmission assembly 7;

[0046] When the movable arm assembly 2 is closed, the transmission assembly 7 is driven by the opening and closing guide part to act on the elastic moving assembly 6, so that the moving assembly 6 and the locking assembly 5 are pre-locked. When the movable arm assembly 2 is closed to the corresponding angle, the moving assembly 6 acts on the first elastic member 20 and drives the first elastic member 20 to elastically act on the locking assembly 5, so that when the movable arm assembly 2 is pressed to open next time, the first elastic member 20 unlocks the moving assembly 6 and the locking assembly 5. When the movable arm assembly 2 is closed to the corresponding angle, the elastic forces of the movable arm assembly 2 and the moving assembly 6 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 external force.

[0047] The locking assembly 5 includes a locking member 8 and a second elastic member 10 disposed between the locking member 8 and the bracket 1. The moving assembly 6 includes at least a moving member 9, which is disposed at one end of the moving assembly 6. A pre-locking portion is disposed between the locking member 8 and the moving member 9. The pre-locking portion includes a locking portion 8.1 disposed on the locking member 8 and a limiting portion 9.1 disposed on the moving member 9. The second elastic member 10 is a spring.

[0048] The locking member 8 is elastically movable on the bracket 1 by the second elastic member 10, and is separated from the movable member 9 by the pre-locking portion to be unlocked or pre-locked during the elastic movement; specifically, when the door opening device is not activated, the locking portion 8.1 and the limiting portion 9.1 are mutually limited and locked. When the pressing component 3 is pressed, the pressing component 3 drives the swing arm 4 to swing, so that the swing arm 4 pushes the movable member 9 to the right ( Figure 2 1, and the second elastic member 10 pushes the locking member 8 upward ( Figure 4 The locking portion 8.1 and the limiting portion 9.1 are locked to each other.

[0049] The pressing assembly 3 includes a pressing member 11 and a third elastic member 18 disposed between the pressing member 11 and the bracket 1 , wherein the third elastic member 18 is a spring;

[0050] The pressing member 11 is elastically movable on the bracket 1 through the third elastic member 18, and acts on the swing arm 4 through the first acting end 4.1 when elastically moving, so that the swing arm 4 drives one end of the moving component 6 to move through the second acting end 4.2; or, after the pressing member 11 extends out of the bracket 1, when the moving member 9 elastically resets, the third elastic member 18 elastically acts on the pressing member 11, so that the pressing member 11 elastically resets, and when the pressing member 11 elastically resets, it drives the swing arm 4 to reset through the first acting end 4.1.

[0051] The movable arm assembly 2 includes a movable arm 12 and a fourth elastic member 13 arranged between the movable arm 12 and the bracket 1, the fourth elastic member 13 is a torsion spring, one end of the torsion spring elastically acts on the action part 1.1 of the bracket 1, and the other end of the torsion spring elastically acts on the movable arm 12, and the movable arm 12 elastically moves on the bracket 1 through the fourth elastic member 13. The movable assembly 6 also includes a fifth elastic member 14, a transmission matching member 17 and a sixth elastic member 15 arranged between the movable member 9 and the bracket 1, the fifth elastic member 14 is a spring, and the sixth elastic member 15 is a tension spring. The movable assembly 6 elastically moves on the bracket 1 through the sixth elastic member 15, and the movable member 9 is elastically connected to the transmission matching member 17 through the fifth elastic member 14, and the transmission matching member 17 is transmission-matched with the transmission assembly 7;

[0052] When the locking member 8 is unlocked from the moving member 9, the fifth elastic member 14 elastically acts on the moving member 9 to move the moving member 9 toward the swing arm 4, thereby making the elastic force of the movable arm assembly 2 on the transmission assembly 7 greater than the elastic force of the movable assembly 6 on the transmission assembly 7, and then the elastic force of the fourth elastic member 13 causes the movable arm 12 to elastically extend outside the bracket 1; specifically, when the door opening device is not started, that is, when the pressing assembly 3 is not pressed, the fifth elastic member 14 is in a compressed state, and the elastic force of the fifth elastic member 14 is transmitted through the transmission matching member 17 It acts on the transmission component 7 and then on the movable arm 12. At this time, the elastic force of the fifth elastic member 14 is basically the same as the elastic force of the fourth elastic member 13 (balanced), so that the movable arm 12 will not rotate; when the pressing component 3 is pressed, the movable member 9 moves toward the swing arm 4, so that the elastic force of the fifth elastic member 14 is released (the fifth elastic member 14 is in an elongated state). At this time, the elastic force of the fifth elastic member 14 is less than the elastic force of the fourth elastic member 13, and the movable arm 12 automatically opens under the elastic force of the fourth elastic member 13 and opens to the maximum position.

[0053] In addition, the fifth elastic member 14 exerts elastic force on the movable member 9, and the third elastic member 18 exerts elastic force on the swing arm 4 through the pressing member 11, so that the movable member 9 maintains transmission contact with the second action end 4.2 of the swing arm 4, that is, the second action end 4.2 of the swing arm 4 always moves with the movable member 9, or the movable member 9 always moves with the second action end 4.2 of the swing arm 4, and there will be no idle travel between the two, that is, there will be no transmission gap, so no collision will occur when the two move.

[0054] When the movable arm assembly 2 is opened to a corresponding angle, the sixth elastic member 15 elastically acts on the moving member 9 to move the moving assembly 6 toward the transmission assembly 7 .

[0055] The transmission assembly 7 includes at least a swing block 16, an opening and closing guide portion is provided between the movable arm 12 and the swing block 16, and the swing block 16 cooperates with the transmission fitting 17;

[0056] When the movable arm 12 is closed, the swing block 16 is driven to swing through the opening and closing guide part. When the swing block 16 swings, it acts on the transmission matching part 17 to make the transmission matching part 17 move in the direction of the moving part 9 and act on the moving part 9 through the fifth elastic part 14 to pre-lock the moving part 9 with the locking part 8. When the transmission matching part 17 moves, the fifth elastic part 14 is compressed. When the movable arm 12 is closed to the corresponding angle, the transmission matching part 17 moves and drives the first elastic part 20 to elastically act on the locking part 8; when the movable arm 12 is closed to the corresponding angle, the elastic forces of the movable arm assembly 2 and the moving assembly 6 acting on the transmission assembly 7 are basically balanced, that is, the elastic force of the fifth elastic part 14 is basically balanced (the same) with the elastic force of the fourth elastic part 13, and the elastic force of the fifth elastic part 14 acts on the swing block 16 through the transmission matching part 17, and then the swing block 16 acts on the movable arm 12 through the opening and closing guide part, so that the movable arm 12 produces a hovering effect.

[0057] The opening and closing guide portion includes a guide portion 12.1 provided on the movable arm 12 and a curved guide matching portion 16.1 provided on the swing block 16. The guide portion 12.1 is a rotating wheel rotatably provided on the movable arm 12.

[0058] When the movable arm assembly 2 is opened, the movable member 9 elastically resets and drives the transmission fitting member 17 to move. The transmission fitting member 17 drives the swing block 16 to swing and act on the movable arm 12, so that the movable arm 12 rotates and opens along the curved guide fitting portion 16.1 through the guide portion 12.1; the curved guide fitting portion 16.1 is provided with an action point 16.2. When the movable arm 12 is opened to a corresponding angle, the guide portion 12.1 disengages from the curved guide fitting portion 16.1 along the action point 16.2, so that the movable arm 12 disengages from the swing block 16 (transmission assembly 7). Thereafter, when the movable arm 12 continues to open, the movable arm 12 is in a state of being disengaged from the swing block 16.

[0059] When the movable arm assembly 2 is closed to a corresponding angle, the guide portion 12.1 of the movable arm 12 acts on the curved guide fitting portion 16.1 along the action point 16.2 under the action of an external force, so that the swing block 16 swings. When the movable arm assembly 2 starts to close, the guide portion 12.1 does not act on the curved guide fitting portion 16.1. When the movable arm assembly 2 is closed to a corresponding angle, the guide portion 12.1 contacts the action point 16.2. Then, when the movable arm assembly 2 continues to close, the guide portion 12.1 acts on the curved guide fitting portion 16.1 until the movable arm assembly 2 is completely closed.

[0060] During the opening or closing process of the movable arm 12 , the guide portion 12 . 1 and the curved guide fitting portion 16 . 1 guide the rotation of the movable arm 12 .

[0061] The bracket 1 is provided with linear limiting guide parts corresponding to the locking part 8, the moving part 9 and the pressing part 11 respectively. The locking part 8, the moving part 9 and the pressing part 11 are linearly limited and movable on the bracket 1 through the linear limiting guide parts.

[0062] The locking member 8 is provided with a first acting portion 8.2, and the transmission matching member 17 is provided with a second acting portion 17.1. When the movable arm assembly 2 is closed, one end of the first elastic member 20 elastically acts on the first acting portion 8.2, and the other end of the first elastic member 20 elastically acts on the second acting portion 17.1.

[0063] The present door opening device is applied to furniture, which includes a cabinet body A and a door body B. The door body B is hinged to the cabinet body A through a hinge C with a large elastic force. The bracket 1 is fixed to the cabinet body A. One end of the movable arm 12 is rotatably provided with a roller 19 made of plastic. When the movable arm 12 is hinged to open and close on the bracket 1, the roller 19 moves on the door body B, thereby realizing the opening or closing of the door body B; when the door body B is closed, the door body B is pressed, and then the pressing component 3 is pressed by the door body to realize the opening of the door body B. After the door body B is opened, the door body B is pushed by hand, and the door body B begins to close, and the movable arm 12 is also closed at the same time. When the movable arm 12 is closed to the corresponding angle, the elastic forces of the movable arm component 2 and the moving component 6 on the transmission component 7 are basically balanced. At this time, the door body B is released, and under the elastic force of the hinge C, the door body B will automatically close, and the movable arm 12 is closed at the same time.

[0064] By setting the roller 19, when the movable arm 2 is hinged to open and close on the bracket 1, the roller 19 rolls in contact with the door body B to open or close 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 opener.

[0065] Working process of door opening device:

[0066] Opening process:

[0067] See also Figure 1-Figure 4, press the pressing member 11, the pressing member 11 drives the swing arm 4 to push the moving member 9 to the right, the first elastic member 10 pushes the locking member 8 downward, the locking member 8 and the moving member 9 unlock each other, and the moving member 9 moves toward the swing arm 4 under the elastic force of the fifth elastic member 14. The movable arm 2 opens under the elastic force of the fourth elastic member 13. At the same time, the moving member 9 drives the swing arm 4 to push the pressing member 11 downward, so that the pressing member 11 extends out of the bracket 1. When the movable arm 12 opens to the corresponding angle, the moving member 9 is reset under the elastic force of the sixth elastic member 15 and drives the transmission matching member 17 to move. The other end of the first elastic member 20 disengages from the transmission matching member 17, and the transmission matching member 17 drives the swing block 16 to act on the movable arm On the movable arm 12, the movable arm 12 continues to open along the opening and closing guide part under the elastic force of the fourth elastic member 13, and when it continues to open to the 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 movable member 9 is reset, the pressing member 11 is reset under the elastic force of the third elastic member 18, and when the pressing member 11 is reset, the swing arm 4 is driven to reset, and at the same time, the locking member 8 is reset under the elastic force of the second elastic member 10, and the locking member 8 is locked with the movable member 9 after being reset.

[0068] Shutdown process:

[0069] See also Figure 4-Figure 7 , the movable arm 12 begins to close under the action of external force, and when it is closed to the corresponding angle, the movable arm 12 drives the swing block 16 to swing through the opening and closing guide part, and then the swing block 16 drives the transmission matching part 17 to move in the direction of the movable part 9, thereby compressing the fifth elastic part 14, and the movable component 6 is pre-locked with the locking component 5. When the movable arm 12 is closed to the corresponding angle, the transmission matching part 17 acts on the first elastic part 20 and drives the first elastic part 20 to elastically act on the locking part 8. The first elastic part 20 is compressed. When the movable arm 12 is closed to the corresponding angle, the elastic forces of the movable arm component 2 and the movable component 6 on the swing block 16 are basically balanced, and the movable arm 12 continues to close to the maximum position under the action of external force.

[0070] The above is a preferred embodiment of the present invention, which illustrates 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 to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A door opening device, comprising a bracket (1) and a movable arm assembly (2) elastically and movably arranged on the bracket (1), a pressing assembly (3), a locking assembly (5) and a moving assembly (6), wherein the movable arm assembly (2) is elastically hinged to open and close on the bracket (1), and a swing arm (4) is provided between the moving assembly (6) and the pressing assembly (3), characterized in that: A first elastic member (20) is provided between the locking assembly (5) and the moving assembly (6); When the movable arm assembly (2) is closed, one end of the first elastic member (20) elastically acts on the locking assembly (5), and the other end of the first elastic member (20) elastically acts on the moving assembly (6), and during the opening and closing process of the movable arm assembly (2), the moving assembly (6) maintains transmission contact with the swing arm (4) under the action of elastic force; and when the locking assembly (5) and the moving assembly (6) are unlocked, the pressing assembly (3) drives one end of the moving assembly (6) to move through the swing arm (4), and the locking assembly (5) is separated from the moving assembly (6) by the first elastic member (20) and unlocked; A transmission assembly (7) is provided between one end of the moving assembly (6) and the movable arm assembly (2); When the movable arm assembly (2) is opened to a corresponding angle, the other end of the moving assembly (6) moves and acts on the transmission assembly (7), the other end of the first elastic member (20) is separated from the moving assembly (6), the locking assembly (5) is elastically reset and locked with the moving assembly (6), the pressing assembly (3) is elastically reset and acts on the swing arm (4), so that the swing arm (4) is reset, and the movable arm assembly (2) is separated from the transmission assembly (7) during the continued opening process; An opening and closing guide portion is provided between the movable arm assembly (2) and the transmission assembly (7); When the movable arm assembly (2) is closed, the transmission assembly (7) is driven by the opening and closing guide part to act on the elastic moving assembly (6), so that the moving assembly (6) and the locking assembly (5) are pre-locked. When the movable arm assembly (2) is closed to a corresponding angle, the moving assembly (6) acts on the first elastic member (20) and drives the first elastic member (20) to act on the locking assembly (5). When the movable arm assembly (2) is closed to a corresponding angle, the elastic forces of the movable arm assembly (2) and the moving assembly (6) 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 assembly (5) includes a locking member (8) and a second elastic member (10) arranged between the locking member (8) and the bracket (1); the moving assembly (6) includes at least a moving member (9); and a pre-locking portion is arranged between the locking member (8) and the moving member (9); The locking member (8) is elastically movable on the bracket (1) via the second elastic member (10), and is separated from the moving member (9) by the pre-locking portion to be unlocked or pre-locked during the elastic movement; The pressing assembly (3) includes a pressing member (11) and a third elastic member (18) arranged between the pressing member (11) and the bracket (1); The pressing member (11) is elastically movable on the bracket (1) via the third elastic member (18), and acts on the swing arm (4) via the first action end (4.1) during the elastic movement, so that the swing arm (4) drives one end of the moving component (6) to move via the second action end (4.2); or, the pressing member (11) is elastically movable, and drives the swing arm (4) to reset via the first action end (4.1); The movable arm assembly (2) includes a movable arm (12) and a fourth elastic member (13) arranged between the movable arm (12) and the bracket (1); the movable arm (12) elastically moves on the bracket (1) through the fourth elastic member (13); the movable assembly (6) also includes a fifth elastic member (14), a transmission matching member (17) and a sixth elastic member (15) arranged between the movable member (9) and the bracket (1); the movable assembly (6) elastically moves on the bracket (1) through the sixth elastic member (15); the movable member (9) is elastically connected to the transmission matching member (17) through the fifth elastic member (14); and the transmission matching member (17) is transmission-matched with the transmission assembly (7); When the locking member (8) and the moving member (9) are unlocked, the fifth elastic member (14) elastically acts on the moving member (9) to move the moving member (9) toward the swing arm (4), thereby making the elastic force of the movable arm assembly (2) on the transmission assembly (7) greater than the elastic force of the movable assembly (6) on the transmission assembly (7), and then the elastic force of the fourth elastic member (13) causes the movable arm (12) to elastically extend outside the bracket (1); When the movable arm assembly (2) is opened to a corresponding angle, the sixth elastic member (15) elastically acts on the moving member (9) to move the moving assembly (6) in the direction of the transmission assembly (7).

2. The door opening device according to claim 1, characterized in that: During the unlocking or locking process, the locking assembly (5) and the moving assembly (6) act on the locking assembly (5) through the first elastic member (20) to compensate for the transmission gap between the swing arm (4) and the moving assembly (6).

3. The door opening device according to claim 1, characterized in that: The swing arm (4) is hinged on the bracket (1) and comprises a first action end (4.1) and a second action end (4.2); When the pressing component (3) is pressed, the first action end (4.1) drives the swing arm (4) to move, and the swing arm (4) acts on the moving component (6) through the second action end (4.2) to move one end of the moving component (6), and the locking component (5) is unlocked from the moving component (6). One end of the moving component (6) acts on the swing arm (4) through the second action end (4.2), so that the swing arm (4) drives the pressing component (3) to elastically extend out of the bracket (1) through the first action end (4.1), and the movable arm component (2) and the pressing component (3) elastically extend out of the bracket (1) at the same time.

4. The door opening device according to claim 1, characterized in that: The transmission assembly (7) at least includes a swing block (16), an opening and closing guide portion is arranged between the movable arm (12) and the swing block (16), and the swing block (16) and the transmission matching member (17) cooperate with each other; When the movable arm (12) is closed, the swing block (16) is driven to swing through the opening and closing guide portion. When the swing block (16) swings, it acts on the transmission matching member (17), so that the transmission matching member (17) moves in the direction of the moving member (9), and acts on the moving member (9) through the fifth elastic member (14), so that the moving member (9) and the locking member (8) are pre-locked. When the movable arm (12) is closed to a corresponding angle, the transmission matching member (17) moves and drives the first elastic member (20) to elastically act on the locking member (8).

5. The door opening device according to claim 1, characterized in that: The bracket (1) is provided with linear limiting guides corresponding to the locking member (8), the moving member (9) and the pressing member (11), and the locking member (8), the moving member (9) and the pressing member (11) are linearly limited and movable on the bracket (1) through the linear limiting guides.

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