Automatic door opening buffer hinge

Abstract

The utility model discloses an automatic door opening buffer hinge which comprises a hinge arm, a hinge cup, an outer swing arm and an inner swing arm, the hinge arm is connected with the hinge cup through the outer swing arm and the inner swing arm, and the automatic door opening buffer hinge is characterized by further comprising a torsion spring, a driving arm used for driving the hinge cup to be opened is formed at one end of the torsion spring and connected with the inner swing arm. The hinge arm is hinged to the rear end of the outer swing arm through a first fixed pin shaft, the front end of the outer swing arm is hinged to the hinge cup through a first movable pin shaft, the front end of the inner swing arm is hinged to the hinge cup through a second movable pin shaft, the first fixed pin shaft is sleeved with the torsion spring, and the hinge arm is provided with a second fixed pin shaft capable of supporting thrust of the driving arm to the inner swing arm when the hinge cup is in a closed state. The hinge arm is hinged to the rear end of the inner swing arm through a second fixed pin shaft. The hinge is favorable for opening the cabinet door in a time-saving and labor-saving manner, and is favorable for opening the cabinet door conveniently.

Description

Technical Field

[0001] The utility model relates to the field of hinges for furniture, in particular to an automatic door opening buffer hinge. Background Art

[0002] At present, the hinge includes a fixed mounting seat, a hinge arm and a hinge cup. The fixed mounting seat is installed on the inner panel of the cabinet body, the hinge arm is installed on the fixed mounting seat, and the hinge cup is installed on the back of the cabinet door. The hinge arm is hinged to the hinge cup through an outer swing arm and an inner swing arm, so that the cabinet door can swing horizontally. However, the hinges on the market do not have the function of driving the cabinet door to open, which makes it time-consuming and laborious for users to open the cabinet door. Therefore, the hinges in the prior art are not convenient for opening the cabinet door, and it is necessary to make improvements. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide an automatic door opening buffer hinge, which is conducive to making the cabinet door open more conveniently.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] The automatic door opening buffer hinge disclosed by the utility model includes a hinge arm, a hinge cup, an outer swing arm and an inner swing arm, wherein the hinge arm is connected to the hinge cup via the outer swing arm and the inner swing arm; wherein, it also includes a torsion spring, one end of which is formed with a driving arm for driving the hinge cup to open, the driving arm is connected to the inner swing arm, a buffer assembly is provided in the hinge arm, the buffer assembly includes an outer shell and a buffer for buffering the hinge cup to open to an extreme position, the buffer is provided with a cylinder body and a piston rod, the cylinder body is adapted to be slidably arranged in the outer shell, the end of the piston rod contacts the inner wall of the outer shell, the inner swing arm is formed with a cam portion, and the cam portion can contact and push the tail end of the cylinder body by swinging around a second fixed pin shaft.

[0006] Preferably, the hinge arm is hinged to the rear end of the outer swing arm through a first fixed pin shaft, the front end of the outer swing arm is hinged to the hinge cup through a first movable pin shaft, the front end of the inner swing arm is hinged to the hinge cup through a second movable pin shaft, the torsion spring is sleeved on the first fixed pin shaft, and the hinge arm is provided with a second fixed pin shaft capable of supporting the thrust of the driving arm on the inner swing arm when the hinge cup is in a closed state, and the hinge arm is hinged to the rear end of the inner swing arm through the second fixed pin shaft.

[0007] Preferably, the inner swing arm is rotatably connected to a pressure wheel, and the driving arm is closely connected to the pressure wheel.

[0008] Preferably, a positioning pin is provided on the hinge arm, and the positioning pin is adapted to pass through the shell. A hook is formed at the front end of the shell, and the hook is buckled with the second positioning pin.

[0009] Preferably, the inner swing arm is formed with a positioning groove for adapting to contact the spiral portion of the torsion spring when the hinge cup is in an open state, the positioning groove is arranged between the second fixed pin shaft and the second movable pin shaft, and the positioning groove is set as an arc-shaped groove.

[0010] Compared with the prior art, the utility model has the following beneficial effects: a driving arm for driving the hinge cup to open is formed by setting one end of the torsion spring, and the driving arm is connected to the inner swing arm, so that the hinge of the utility model is conducive to opening the cabinet door in a time-saving and labor-saving manner, and is conducive to making the cabinet door easy to open. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional cross-sectional structural schematic diagram of the hinge of the utility model in a closed state.

[0012] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a hinge in a closed state of the utility model.

[0013] Figure 3 It is a three-dimensional structural schematic diagram of the hinge of the utility model in an open state.

[0014] Figure 4 For the corresponding Figure 3 A schematic diagram of the three-dimensional structure of one side with the hinge of the hinge arm removed.

[0015] Figure 5 For the corresponding Figure 3 A schematic diagram of the three-dimensional structure of the other side corresponding to the hinge of the hinge arm is removed.

[0016] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the hinge of the utility model in an open state.

[0017] Figure 7 It is a three-dimensional structural schematic diagram of the buffer assembly of the utility model.

[0018] Figure 8 It is a schematic diagram of the three-dimensional structure of the inner swing arm of the utility model.

[0019] Explanation of reference numerals: fixed mounting seat 1; hinge arm 2; hinge cup 3; outer swing arm 4; inner swing arm 5; first hinge hole 501; second hinge hole 502; positioning groove 503; cam portion 51; torsion spring 6; drive arm 61; support arm 62; first fixed pin shaft 71; second fixed pin shaft 72; first movable pin shaft 73; second movable pin shaft 74; positioning pin shaft 75; pressure wheel 8; buffer assembly 9; buffer 91; cylinder body 911; piston rod 912; outer shell 92; seat body 921; hook 9211; back cover 922; mounting hole 9221. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] The automatic door opening buffer hinge of the utility model is as follows Figures 1 to 6 As shown, it includes a hinge arm 2, a hinge cup 3, an outer swing arm 4 and an inner swing arm 5. The hinge arm 2 is connected to the hinge cup 3 through the outer swing arm 4 and the inner swing arm 5. The automatic door opening buffer hinge of the utility model also includes a torsion spring 6. One end of the torsion spring 6 is formed with a driving arm 61 for driving the hinge cup 3 to open. The driving arm 61 is connected to the inner swing arm 5. Figure 1 and Figure 2 As shown, the hinge cup 3 is in a closed state, so the cabinet door is also in a closed state. At this time, the torsion spring 6 is in an elastic torsion state, so the driving arm 61 applies a thrust to the inner swing arm 5. When the user opens the cabinet door, the driving arm 61 pushes the inner swing arm 5 to swing. That is, in the process of opening the cabinet door, the direction of the torque generated by the driving arm 61 on the inner swing arm 5 is the same as the swing direction of the inner swing arm 5 relative to the hinge arm 2, so that the torsion spring 6 can drive the cabinet door to open automatically. Therefore, the hinge of the utility model is conducive to saving time and effort in opening the cabinet door, and is conducive to making the cabinet door easy to open.

[0022] Furthermore, if Figures 1 to 6 As shown, the hinge arm 2 is hinged to the rear end of the outer swing arm 4 through the first fixed pin shaft 71, the front end of the outer swing arm 4 is hinged to the hinge cup 3 through the first movable pin shaft 73, and the front end of the inner swing arm 5 is hinged to the hinge cup 3 through the second movable pin shaft 74. The hinge arm 2 is installed on the fixed mounting seat 1, the fixed mounting seat 1 is used to be installed on the inner side plate of the cabinet, and the hinge cup 3 is used for embedded installation on the back of the cabinet door; in the actual installation and use state, when the cabinet door is opened, the user can see the outer swing arm 4, as shown in FIG. Figure 3 As shown, the outer swing arm 4 is wrapped around the outer side of the inner swing arm 5. Figure 1 As shown, the torsion spring 6 is sleeved on the first fixed pin shaft 71. Figure 2 As shown, the hinge arm 2 is provided with a second fixed pin shaft 72 which can support the thrust of the driving arm 61 on the inner swing arm 5 when the hinge cup 3 is in the closed state, and the hinge arm 2 is hinged to the rear end of the inner swing arm 5 through the second fixed pin shaft 72. Figure 1 and Figure 2As shown in the figure, the hinge cup 3 is in a closed state, so the cabinet door is also in a closed state. At this time, the torsion spring 6 is in an elastic torsion state, so the driving arm 61 applies a thrust to the inner swing arm 5. Since the second fixed pin shaft 72 is roughly on the action line of the thrust of the driving arm 61 on the inner swing arm 5, that is to say, the second fixed pin shaft 72 supports the thrust of the driving arm 61 on the inner swing arm 5. Therefore, at this time, the thrust applied by the driving arm 61 to the inner swing arm 5 has a very small torque on the axis of the second fixed pin shaft 72. Therefore, at this time, the cabinet door can be kept in a closed state by friction; the above-mentioned friction mainly includes the friction between the hinge arm 2 and the outer swing arm 4 and the friction between the outer swing arm 4 and the hinge cup 3; when the user pulls open the cabinet door, as shown in FIG. Figure 2 As shown, the inner swing arm 5 will rotate clockwise around the second fixed pin shaft 72, so that the line of action of the thrust of the driving arm 61 on the inner swing arm 5 will leave the second fixed pin shaft 72, so that the thrust applied by the driving arm 61 to the inner swing arm 5 on the axis of the second fixed pin shaft 72 will gradually increase, and then the above-mentioned torque will overcome the above-mentioned friction force, so that the cabinet door can continue to open automatically through the elastic restoring force of the torsion spring 6 (that is, the cabinet door has been released by the human hand). In other words, the user only needs to open the cabinet door at a small angle, and the cabinet door can automatically continue to open to the extreme position. Therefore, the hinge of the utility model is conducive to saving time and effort in opening the cabinet door, and is conducive to making the cabinet door easy to open.

[0023] Furthermore, if Figure 1 and Figure 4 As shown, the inner swing arm 5 is rotatably connected to the pressure wheel 8, which is specifically sleeved on a rivet, which is adapted to pass through the inner swing arm 5, and the driving arm 61 is close to the pressure wheel 8. Therefore, when the inner swing arm 5 swings around the second fixed pin 72, the cylindrical surface of the pressure wheel 8 rolls relatively on the driving arm 61, thereby avoiding the driving arm 61 from having a significant impact on the swing of the inner swing arm 5, which is conducive to flexible opening and closing of the door. Figure 2 As shown, the driving arm 61 is pressed on the cylindrical surface of the pressed wheel 8. At this time, the center of the pressed wheel 8 is located between the contact point between the driving arm 61 and the pressed wheel 8 and the second fixed pin shaft 72. Therefore, the thrust applied by the driving arm 61 to the inner swing arm 5 at this time has a very small torque on the axis of the second fixed pin shaft 72.

[0024] Furthermore, if Figure 1 and Figure 6 As shown, a buffer assembly 9 is provided in the hinge arm 2, and the buffer assembly 9 includes a housing 92 and a buffer 91 for buffering the hinge cup 3 to open to the limit position. The buffer 91 includes a cylinder 911 and a piston rod 912. The cylinder 911 is adapted to be slidably provided in the housing 92, and the end of the piston rod 912 contacts the inner wall of the housing 92. Figure 8 As shown, the inner swing arm 5 is formed with a cam portion 51. Figure 6As shown, the cam portion 51 can contact the rear end of the push cylinder 911 by swinging around the second fixed pin shaft 72. The cam portion 51 is located at the front side of the cylinder 911. Figure 2 and Figure 6 As shown, in the process of opening the cabinet door, the inner swing arm 5 swings around the second fixed pin shaft 72, so that the cam portion 51 swings around the second fixed pin shaft 72 close to the rear end surface of the cylinder body 911, and then the cam portion 51 collides with the rear end surface of the cylinder body 911, and then the cam portion 51 slides on the rear end surface of the cylinder body 911, so that the cam portion 51 pushes the cylinder body 911 to move backward, and because the end of the piston rod 912 contacts the inner wall of the connecting shell 92, that is, the inner wall of the shell 92 blocks the piston rod 912 from moving backward, so that the piston rod 912 moves relatively in the direction of retracting into the cylinder body 911, and then the hinge cup 3 opens to the extreme position. In the process of the cam portion 51 pushing the cylinder body 911, the buffer 91 plays a deceleration and buffering role to avoid the hinge parts from violently colliding with each other when the hinge cup 3 is opened to the extreme position.

[0025] Furthermore, if Figure 4 and Figure 5 As shown, the hinge arm 2 is provided with a positioning pin 75, and the positioning pin 75 is adapted to pass through the housing 92. Figure 7 As shown, the front end of the housing 92 is formed with a hook 9211. Figure 4 and Figure 5 As shown, the hook 9211 is buckled with the second fixed pin shaft 72, so that the housing 92 is positioned on the hinge arm 2 with a simple structure, avoiding the need to fix the housing 92 with screws. Figure 7 As shown, the housing 92 includes a seat body 921 and a rear cover 922, a hook 9211 is formed on the seat body 921, a cylinder body 911 is slidably disposed in the seat body 921, the rear cover 922 covers the rear end of the seat body 921, the end of the piston rod 912 is against the inner wall of the rear cover 922, a mounting hole 9221 is formed on the rear cover 922, a positioning pin shaft 75 passes through the mounting hole 9221 and the seat body 921, and the rear cover 922 is also buckled with the seat body 921, so that the rear cover 922 and the seat body 921 are relatively fixed.

[0026] like Figure 5 As shown, a support arm 62 is formed at the other end of the torsion spring 6 , and the support arm 62 can be abutted against the positioning pin shaft 75 .

[0027] Furthermore, if Figure 6 and Figure 8As shown, the inner swing arm 5 is formed with a positioning groove 503 for adapting to the spiral portion of the torsion spring 6 when the hinge cup 3 is in the open state. Specifically, the spiral portion of the torsion spring 6 is sleeved on the first fixed pin shaft 71, and the positioning groove 503 is arranged between the second fixed pin shaft 72 and the second movable pin shaft 74. The positioning groove 503 is set as an arc-shaped groove, so that the positioning groove 503 is adapted to the shape of the spiral portion of the torsion spring 6. The front end of the inner swing arm 5 is formed with a first hinge hole 501, and the rear end of the inner swing arm 5 is formed with a second hinge hole 502. The second movable pin shaft 74 passes through the first hinge hole 501. The second fixed pin shaft 72 passes through the second hinge hole 502, and the cam portion 51 is located at the rear side of the second hinge hole 502 (when the hinge is in the open state). Therefore, in the process of opening the cabinet door, the inner swing arm 5 gradually approaches the spiral portion of the torsion spring 6. When the positioning groove 503 covers the spiral portion of the torsion spring 6, the inner swing arm 5 is blocked by the spiral portion of the torsion spring 6 and cannot continue to swing. At this time, the hinge cup 3 and the cabinet door are opened to the limit position, and the collision of the positioning groove 503 and the spiral portion of the torsion spring 6 obtains the buffering effect of the buffer 91. By setting the positioning groove 503 to contact the spiral portion of the torsion spring 6, it is beneficial to increase the collision contact area and avoid the torsion spring 6 from being damaged by frequent collisions.

Claims

1. An automatic door opening buffer hinge, comprising a hinge arm (2), a hinge cup (3), an outer swing arm (4) and an inner swing arm (5), wherein the hinge arm (2) is connected to the hinge cup (3) via the outer swing arm (4) and the inner swing arm (5), and characterized in that: The invention also comprises a torsion spring (6), one end of which is formed with a driving arm (61) for driving the hinge cup (3) to open, the driving arm (61) being connected to the inner swing arm (5), a buffer assembly (9) being provided inside the hinge arm (2), the buffer assembly (9) comprising an outer shell (92) and a buffer (91) for buffering the hinge cup (3) to open to an extreme position, the buffer (91) being provided with a cylinder body (911) and a piston rod (912), the cylinder body (911) being adapted to be slidably arranged inside the outer shell (92), the end of the piston rod (912) being in contact with the inner wall of the outer shell (92), the inner swing arm (5) being formed with a cam portion (51), the cam portion (51) being able to contact and push the tail end of the cylinder body (911) by swinging around a second fixed pin shaft (72).

2. The automatic door opening buffer hinge according to claim 1, characterized in that: The hinge arm (2) is hinged to the rear end of the outer swing arm (4) via a first fixed pin shaft (71); the front end of the outer swing arm (4) is hinged to the hinge cup (3) via a first movable pin shaft (73); the front end of the inner swing arm (5) is hinged to the hinge cup (3) via a second movable pin shaft (74); the torsion spring (6) is sleeved on the first fixed pin shaft (71); the hinge arm (2) is provided with a second fixed pin shaft (72) capable of supporting the thrust of the driving arm (61) on the inner swing arm (5) when the hinge cup (3) is in a closed state; the hinge arm (2) is hinged to the rear end of the inner swing arm (5) via the second fixed pin shaft (72).

3. The automatic door opening buffer hinge according to claim 2, characterized in that: The inner swing arm (5) is rotatably connected to a pressure wheel (8), and the driving arm (61) is closely connected to the pressure wheel (8).

4. The automatic door opening buffer hinge according to claim 2, characterized in that: The hinge arm (2) is provided with a positioning pin shaft (75), the positioning pin shaft (75) is adapted to pass through the housing (92), a hook (9211) is formed at the front end of the housing (92), and the hook (9211) is buckled with the second positioning pin shaft (72).

5. The automatic door opening buffer hinge according to claim 2, characterized in that: The inner swing arm (5) is formed with a positioning groove (503) for adapting to contact the spiral portion of the torsion spring (6) when the hinge cup (3) is in an open state, the positioning groove (503) being arranged between the second fixed pin shaft (72) and the second movable pin shaft (74), and the positioning groove (503) being arranged as an arc-shaped groove.

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