A turnover hinge device for furniture

Abstract

The application discloses a turnover hinge device for furniture, which comprises a connecting rod mechanism, a door closing elastic reset mechanism and a bidirectional damping buffer mechanism. The connecting rod mechanism comprises a main swing arm, an auxiliary swing arm, a cabinet door arm, a connecting arm and a double connecting arm. The connecting arm and the main swing arm form a herringbone-shaped supporting point layout, so that the cabinet door arm is horizontally moved first and then turned downward when being opened. The door closing elastic reset mechanism acts on the main swing arm to provide a door closing reset force for the cabinet door arm. The bidirectional damping buffer mechanism is compressed by the auxiliary swing arm when the door is being closed to provide a door closing buffer, and is compressed by the auxiliary swing arm when the door is being opened to provide an opening door buffer. The application has the advantages of compact structure, stable movement, realization of the functions of horizontal movement first and then turning, bidirectional damping buffer and suitability for various down-turning door furniture.

Description

Technical Field

[0001] This invention relates to the field of furniture hinge technology, and more specifically to a flip hinge device for furniture. Background Technology

[0002] Flip-down doors are a common type of cabinet door in furniture, widely used in wall cabinets, base cabinets, and other similar applications. Flip-down doors are connected to the cabinet body via hinges; the door opens by flipping downwards around the hinge axis and closes by flipping upwards. Compared to hinged doors, flip-down doors have the advantage of not occupying side space when open, making them particularly suitable for compact areas such as kitchens, bathrooms, and balconies.

[0003] Downward-opening door hinges typically need to support the weight of the cabinet door and maintain smooth movement during opening and closing. Existing downward-opening door hinges mostly use single-arm or multi-link mechanisms to achieve the door's tilt. While the single-arm structure is simple, it has significant limitations in load-bearing capacity: the weight of the cabinet door is concentrated on a single arm, leading to stress concentration at the hinge point, which can easily cause wear and misalignment after long-term use. Furthermore, the single-arm cantilever structure is prone to swaying during movement, resulting in poor stability and affecting the user experience and product lifespan.

[0004] While some multi-link hinges improve motion stability by increasing the number of links, their structures are generally loose, occupy a lot of space, and are difficult to adapt to the installation requirements of compact furniture. In addition, existing multi-link hinges are usually composed of multiple links connected in series or in parallel, resulting in an unreasonable load distribution among the hinge points, with the force still being relatively concentrated and the improvement in load-bearing capacity being limited.

[0005] In terms of damping and cushioning, most existing hinges can only achieve unidirectional cushioning, and cannot simultaneously meet the cushioning requirements of both opening and closing. Although some solutions using dual dampers can achieve bidirectional cushioning, they occupy a large space, have a large number of parts, and have high manufacturing costs.

[0006] Therefore, there is a need for a compact, stable, load-bearing, and bidirectional damping door tilting device. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a furniture flip hinge device that is compact in structure, moves smoothly, has a strong load-bearing capacity, and has a bidirectional damping and buffering function.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A reversible hinge device for furniture includes: a linkage mechanism comprising a main swing arm, a secondary swing arm, a cabinet door arm, a connecting arm, and a double-linked arm; the main swing arm has a first swing fulcrum at its bottom end; the secondary swing arm is located behind the main swing arm and has a second swing fulcrum at its bottom end; the cabinet door arm is located in front of the main swing arm, and its bottom end is hinged to the main swing arm via the connecting arm; the connecting arm and the main swing arm form a herringbone fulcrum layout; and the double-linked arm is connected to the top end of the main swing arm and the secondary swing arm, respectively. The top of the swing arm and the middle of the cabinet door arm are hinged so that the cabinet door arm moves horizontally first and then flips downward when opened; a door closing elastic reset mechanism acts on the main swing arm to provide a door closing reset force for the cabinet door arm, at least during the cabinet door closing process; a bidirectional damping buffer mechanism is abutted and compressed by the auxiliary swing arm during the door closing process to provide door closing buffer; during the door opening process, the auxiliary swing arm moves and drives the bidirectional damping buffer mechanism to compress to provide door opening buffer.

[0009] Furthermore, it also includes a mounting base, on which the first swing fulcrum and the second swing fulcrum are disposed, and a horizontal connecting plate is provided between the first swing fulcrum and the second swing fulcrum, the horizontal connecting plate being fixed to the mounting base.

[0010] Furthermore, when the door is fully open, the cabinet door arm abuts against the front side of the main swing arm, and the rear side of the main swing arm abuts against the auxiliary swing arm.

[0011] Furthermore, a plurality of nested first protrusions and first recesses are provided between the inner side of the main swing arm and the outer side of the auxiliary swing arm. When the cabinet door arm is in a vertical state or flipped down to a horizontal state, the first protrusions and the first recesses abut against each other and are nested together.

[0012] Furthermore, a plurality of nested second protrusions and second recesses are provided between the outer side of the main swing arm and the inner side of the cabinet door arm. When the cabinet door arm is in a vertical state or flipped down to a horizontal state, the second protrusions and second recesses abut and nest against each other.

[0013] Furthermore, the inner side of the auxiliary swing arm is provided with a positioning groove, and the double arm is provided with a positioning pin. When the door is fully open, the positioning pin is engaged in the positioning groove.

[0014] Furthermore, the door closing elastic reset mechanism includes a tension spring and a tension spring connector. One end of the tension spring is hinged to the mounting base, and the other end is hinged to one end of the tension spring connector. The other end of the tension spring connector is hinged to the main swing arm. During the opening of the cabinet door, the swing of the main swing arm stretches the tension spring to store energy, while providing tension to prevent the cabinet door from falling rapidly due to its own weight. During the closing of the cabinet door, the tension spring releases the stored energy to apply an elastic force to the main swing arm to assist in closing the cabinet door.

[0015] Furthermore, the bidirectional damping buffer mechanism includes a damping commutator, a damper, and a traction member. The damping commutator is movably mounted on the mounting base and located behind the auxiliary swing arm. The damper is housed within the damping commutator. During the closing process, the auxiliary swing arm abuts against and compresses the damper. During the opening process, the traction member moves with the auxiliary swing arm and hooks onto the damping commutator, causing the damping commutator to move and compress the damper.

[0016] Furthermore, the damping commutator is provided with a movable cavity, and the damper is housed within the movable cavity; the side of the damping commutator is provided with a sliding groove communicating with the movable cavity, and a limiting block is fixedly mounted on the mounting base. The limiting block is provided corresponding to and adapted to the sliding groove to constrain the damping commutator to move only in a straight line direction; at least part of the cylinder end of the damper extends into the sliding groove.

[0017] Furthermore, one end of the damping commutator is provided with an elongated hole, which extends along the linear movement direction of the damping commutator. The mounting base is provided with a sliding pin that mates with the elongated hole to guide the linear movement of the damping commutator and limit its stroke.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the connecting arm and the main swing arm form a herringbone fulcrum layout, and with the hinges of the double connecting arm, the main swing arm, the auxiliary swing arm and the cabinet door arm, the cabinet door arm moves horizontally first and then flips downward when opened, successfully avoiding interference between the embedded cabinet door and the cabinet body when it is opened; at the same time, a door closing elastic reset mechanism and a two-way damping buffer mechanism are configured, and a single damper is used to realize the two-way buffer function for opening and closing the door. The overall structure is compact, the movement is stable and the load-bearing capacity is strong. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the usage state of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 3 This is a side view of the structure of the present invention in the closed state.

[0021] Figure 4 This is a side view of the structure of the present invention in the open state.

[0022] Figure 5 This is an assembly diagram of the linkage mechanism in this invention.

[0023] Figure 6 This is a schematic diagram of the damping commutator in this invention.

[0024] Figure 7 This is a schematic diagram of the assembly of the traction component and the swing arm in this invention.

[0025] Figure 8 This is a schematic diagram of the assembly of the bidirectional damping buffer mechanism and the auxiliary swing arm in the open state of the present invention.

[0026] Figure 9 This is a schematic diagram of the assembly of the bidirectional damping buffer mechanism and the auxiliary swing arm in the closed state of the present invention.

[0027] In the diagram: 1. Linkage mechanism; 11. Main swing arm; 111. First swing fulcrum; 112. First protrusion; 113. Second protrusion; 12. Secondary swing arm; 121. Second swing fulcrum; 122. First recess; 123. Positioning groove; 13. Cabinet door arm; 131. Second recess; 14. Connecting arm; 15. Double arm; 16. Horizontal connecting plate; 17. Positioning pin; 2. Door closing elastic reset mechanism; 21. Tension spring; 22. Tension spring connector; 3. Bidirectional damping buffer mechanism; 31. Damping reversing component; 311. Movable cavity; 312. Slide groove; 313. Elongated hole; 32. Damper; 33. Traction component; 4. Mounting base; 41. Limiting block; 42. Sliding pin. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 9 As shown, the furniture flip hinge device of this embodiment includes a linkage mechanism 1, a door closing elastic reset mechanism 2, a bidirectional damping buffer mechanism 3, and a mounting base 4.

[0030] The linkage mechanism 1 includes a main swing arm 11, a secondary swing arm 12, a cabinet door arm 13, a connecting arm 14, and a double-arm 15. The main swing arm 11 is a block-shaped body with a first swing fulcrum 111 formed at its bottom end, which is mounted on the mounting base 4. The secondary swing arm 12 is a block-shaped body located behind the main swing arm 11, with a second swing fulcrum 121 at its bottom end, which is also mounted on the mounting base 4. The first swing fulcrum 111 and the second swing fulcrum 121 are arranged on the same horizontal line, and a horizontal connecting plate 16 is provided between them. The horizontal connecting plate 16 is fixed to the mounting base 4, connecting the two swing fulcrums into one unit and improving the overall rigidity.

[0031] Cabinet door arm 13 is used to fix and install the cabinet door, and is vertically positioned when closed. Cabinet door arm 13 is located on the front side of the main swing arm 11 (i.e., the side closest to the cabinet door, facing the opening direction), and its bottom end is hinged to the main swing arm 11 via a connecting arm 14. The connecting arm 14 consists of two symmetrically arranged pieces to enhance structural stability. Double arms 15 are arranged at the top of the main swing arm 11, and are hinged to the top of the main swing arm 11, the top of the secondary swing arm 12, and the middle of the cabinet door arm 13, forming a multi-link linkage structure.

[0032] In the closed state, the connecting arm 14 and the main swing arm 11 form a herringbone fulcrum layout. It is this unique fulcrum layout that allows the cabinet door arm 13 to first move outward horizontally during the initial opening, and then flip downward, thereby avoiding interference between the recessed cabinet door and the cabinet body when it is opened.

[0033] To further improve the stability and positioning accuracy of the structure, nested protrusions and recesses are provided between adjacent components. Specifically, multiple nested first protrusions 112 and first recesses 122 are provided between the inner side of the main swing arm 11 and the outer side of the auxiliary swing arm 12; multiple nested second protrusions 113 and second recesses 131 are provided between the outer side of the main swing arm 11 and the inner side of the cabinet door arm 13. When the cabinet door arm 13 is in a vertically closed state or flipped down to a horizontally open state, each protrusion and corresponding recess abuts and nests against each other, enhancing the positioning and support between the components.

[0034] With the door fully open, the cabinet door arm 13 abuts against the front of the main swing arm 11, and the rear of the main swing arm 11 abuts against the auxiliary swing arm 12. The three abut against each other to form a triangular support structure, which improves the stability of the door in the open position. At the same time, the inner side of the auxiliary swing arm 12 is provided with a positioning groove 123, and the double arm 15 is provided with a positioning pin 17. With the door fully open, the positioning pin 17 is engaged in the positioning groove 123, so that the cabinet door arm 13 is stably kept in the fully open position.

[0035] The door-closing elastic reset mechanism 2 includes a tension spring 21 and a tension spring connector 22. One end of the tension spring 21 is hinged to the mounting base 4, and the other end is hinged to one end of the tension spring connector 22. The other end of the tension spring connector 22 is hinged to the main swing arm 11. The tension spring connector 22 is plate-shaped, which facilitates the installation of the tension spring 21 and the adjustment of the force transmission direction. During the opening of the cabinet door, the swing of the main swing arm 11 stretches the tension spring 21 to store energy, while the tension spring 21 provides a certain tension to prevent the cabinet door from falling rapidly due to its own weight. During the closing of the cabinet door, the tension spring 21 releases its stored energy and applies an elastic force to the main swing arm 11 to assist in closing the cabinet door, achieving automatic closing after the cabinet door is closed to a specific angle.

[0036] The bidirectional damping buffer mechanism 3 includes a damping reversing component 31, a damper 32, and a traction component 33. The damping reversing component 31 is movably mounted on the mounting base 4 and located behind the secondary swing arm 12. The damping reversing component 31 has a movable cavity 311, within which the damper 32 is housed. The side of the damping reversing component 31 has a sliding groove 312 communicating with the movable cavity 311. A limiting block 41 is fixedly mounted on the mounting base 4, corresponding to and fitting the sliding groove 312, thus constraining the damping reversing component 31 so that it cannot rotate and can only move in a straight line. At least part of the cylinder end of the damper 32 extends into the sliding groove 312. One end of the damping commutator 31 is provided with an elongated hole 313, which extends along the linear movement direction of the damping commutator 31. The mounting base 4 is provided with a sliding pin 42 that mates with the elongated hole 313, which provides guidance for the linear movement of the damping commutator 31 and limits the movement stroke.

[0037] The traction member 33 is hinged to the auxiliary swing arm 12. One end of the traction member 33 is hinged to the auxiliary swing arm 12, and the other end is provided with a hook portion. The hook portion is used to hook the damping reversing member 31 during the door opening process. In this embodiment, in order to ensure that the hook portion of the traction member 33 can properly hook the damping reversing member 31 during the movement, a compression spring (not shown in the figure) is also provided. A through groove runs through the auxiliary swing arm 12 along the thickness direction. The compression spring is housed in the through groove. The compression spring acts on the traction member 33, applying a downward elastic force to the traction member 33, so that the hook portion always faces downward during the movement. Even if the hinge between the traction member 33 and the auxiliary swing arm 12 becomes difficult to rotate due to wear or dryness after long-term use, the elastic force provided by the compression spring can still ensure that the hook portion is in a downward posture, thereby ensuring that the traction member 33 can stably hook the damping reversing member 31 during the door opening process, improving the reliability of the reversing action.

[0038] The working process of this device.

[0039] In the vertically closed state, the cabinet door arm 13 is vertical, with the main swing arm 11, auxiliary swing arm 12, and double arm 15 retracted into the inner side of the cabinet door arm 13. The first protrusion 112 and the first recess 122 abut against each other and nest together, and the second protrusion 113 and the second recess 131 abut against each other and nest together, ensuring stability of each component in the closed state. The auxiliary swing arm 12 abuts against the cylinder end of the damper 32, pushing the cylinder end to separate from the limiting block 41 and compressing the damper 32. At this time, the damper 32 provides a closing buffer to reduce the rapid pulling of the cabinet door when the tension spring 21 releases its elastic force.

[0040] When the cabinet door needs to be opened, the user presses the door to trigger the rebound mechanism, which pushes the door outward, or the user pulls the door directly. In the initial stage, the main swing arm 11 swings outward around the first swing fulcrum 111. Because the connecting arm 14 and the main swing arm 11 form a V-shaped fulcrum layout, the swing of the main swing arm 11 pushes the cabinet door arm 13 outward through the connecting arm 14, causing the cabinet door to move out of the constraint area of ​​the cabinet opening. As the main swing arm 11 continues to swing, the cabinet door arm 13 begins to flip downward under the combined guidance of the double arm 15 and the connecting arm 14. During this process, the swing of the main swing arm 11 stretches the tension spring 21 to store energy, while simultaneously providing tension to prevent the cabinet door from falling rapidly due to its own weight.

[0041] In the initial stage of opening, the auxiliary swing arm 12 moves with the linkage mechanism 1, and the thrust applied to the cylinder end of the damper 32 gradually decreases until it disappears. The damper 32 resets, and the cylinder end moves along the slide groove 312 and abuts against the limit block 41. As the auxiliary swing arm 12 continues to move, the traction member 33 hooks onto the damping reversing member 31, driving the damping reversing member 31 to move linearly along the guide of the sliding pin 42, causing the inner wall of its movable cavity 311 to compress the damper 32. At this time, the damper 32 provides a door opening buffer to reduce the accelerated descent of the cabinet door due to gravity until the cabinet door is fully opened.

[0042] With the door fully open, the cabinet door arm 13 abuts against the front of the main swing arm 11, and the rear of the main swing arm 11 abuts against the auxiliary swing arm 12, forming a triangular support structure. At the same time, the positioning pin 17 engages with the positioning groove 123, keeping the cabinet door arm 13 stably in the fully open position.

[0043] When the cabinet door closes, the door arm 13 moves in the opposite direction, and the tension spring 21 releases its stored energy to assist in closing the door. The auxiliary swing arm 12 moves in the opposite direction, the traction component 33 resets and disengages from the damping reversing component 31, and the damping reversing component 31 resets under the elastic force of the damper 32 itself. When the cabinet door is closed to a specific angle, the auxiliary swing arm 12 abuts against the cylinder end of the damper 32 again, compressing the damper 32 to provide a closing buffer until the cabinet door is completely closed.

[0044] The furniture flip hinge device of the present invention realizes the composite movement of the cabinet door first moving and then flipping through the herringbone fulcrum layout, avoiding interference when opening the embedded cabinet door; at the same time, it is equipped with a door closing elastic reset mechanism and a two-way damping buffer mechanism, using a single damper to achieve two-way buffering for opening and closing the door, with a compact overall structure, smooth movement and strong load-bearing capacity.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural modifications made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A flip hinge device for furniture, characterized in that, include: The linkage mechanism (1) includes a main swing arm (11), a secondary swing arm (12), a cabinet door arm (13), a connecting arm (14), and a double-arm (15). The bottom end of the main swing arm (11) forms a first swing fulcrum (111). The secondary swing arm (12) is located behind the main swing arm (11) and has a second swing fulcrum (121) at its bottom end. The cabinet door arm (13) is located on the main swing arm (11). The front side of the cabinet door arm (13) is hinged to the main swing arm (11) through the connecting arm (14). The connecting arm (14) and the main swing arm (11) form a herringbone fulcrum layout. The double arm (15) is hinged to the top of the main swing arm (11), the top of the auxiliary swing arm (12) and the middle of the cabinet door arm (13) respectively, so that the cabinet door arm (13) moves horizontally and then flips downward when it is opened. The door closing elastic reset mechanism (2) acts on the main swing arm (11) and provides a door closing reset force to the cabinet door arm (13) at least during the cabinet door closing process; The bidirectional damping buffer mechanism (3) is abutted and compressed by the auxiliary swing arm (12) during the closing process to provide a closing buffer; during the opening process, the auxiliary swing arm (12) moves and drives the bidirectional damping buffer mechanism (3) to compress to provide an opening buffer.

2. The furniture flip hinge device according to claim 1, characterized in that, It also includes a mounting base (4), the first swing fulcrum (111) and the second swing fulcrum (121) are disposed on the mounting base (4), and a horizontal connecting plate (16) is provided between the first swing fulcrum (111) and the second swing fulcrum (121), the horizontal connecting plate (16) being fixed on the mounting base (4).

3. The furniture flip hinge device according to claim 1, characterized in that, When the door is fully open, the cabinet door arm (13) abuts against the front side of the main swing arm (11), and the rear side of the main swing arm (11) abuts against the auxiliary swing arm (12).

4. A reversible hinge device for furniture according to claim 1, characterized in that, The inner side of the main swing arm (11) and the outer side of the auxiliary swing arm (12) are provided with a plurality of nested first protrusions (112) and first recesses (122). When the cabinet door arm (13) is in a vertical state or flipped down to a horizontal state, the first protrusions (112) and the first recesses (122) abut against each other and are nested together.

5. A reversible hinge device for furniture according to claim 1, characterized in that, The outer side of the main swing arm (11) and the inner side of the cabinet door arm (13) are provided with a plurality of nested second protrusions (113) and second recesses (131). When the cabinet door arm (13) is in a vertical state or flipped down to a horizontal state, the second protrusions (113) and the second recesses (131) abut against each other and are nested together.

6. A reversible hinge device for furniture according to claim 1, characterized in that, The inner side of the auxiliary swing arm (12) is provided with a positioning groove (114), and the double arm (15) is provided with a positioning pin (17). When the door is fully open, the positioning pin (17) is inserted into the positioning groove (114).

7. A reversible hinge device for furniture according to claim 1, characterized in that, The door closing elastic reset mechanism (2) includes a tension spring (21) and a tension spring connector (22). One end of the tension spring (21) is hinged to the mounting base (4), and the other end is hinged to one end of the tension spring connector (22). The other end of the tension spring connector (22) is hinged to the main swing arm (11). During the opening of the cabinet door, the swing of the main swing arm (11) stretches the tension spring (21) to store energy, and at the same time provides tension to prevent the cabinet door from falling rapidly due to its own weight. During the closing of the cabinet door, the tension spring (21) releases the stored energy to apply an elastic force to the main swing arm (11) to assist the closing of the cabinet door.

8. A reversible hinge device for furniture according to claim 1, characterized in that, The bidirectional damping buffer mechanism (3) includes a damping reversing component (31), a damper (32), and a traction component (33). The damping reversing component (31) is movably disposed on the mounting base (4) and located between the first swing fulcrum (111) and the second swing fulcrum (121). The damper (32) is housed within the damping reversing component (31). During the closing process, the auxiliary swing arm (12) abuts against and compresses the damper (32). During the opening process, the traction component (33) moves with the auxiliary swing arm (12) and hooks the damping reversing component (31), driving the damping reversing component (31) to move and compress the damper (32).

9. A reversible hinge device for furniture according to claim 8, characterized in that, The damping commutator (31) is provided with a movable cavity (311), and the damper (32) is housed in the movable cavity (311). The side of the damping commutator (31) is provided with a groove (312) communicating with the movable cavity (311). A limiting block (41) is fixedly mounted on the mounting base (4). The limiting block (41) is provided corresponding to the groove (312) and is adapted to the groove (312) to constrain the damping commutator (31) to move only in a straight line direction. At least part of the cylinder end of the damper (32) extends into the groove (312).

10. A reversible hinge device for furniture according to claim 9, characterized in that, One end of the damping commutator (31) is provided with an elongated hole (313), which extends along the linear movement direction of the damping commutator (31). The mounting base (4) is provided with a sliding pin (42) that cooperates with the elongated hole (313) to provide guidance for the linear movement of the damping commutator (31) and limit the movement stroke.

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