Device for folding down a door of simple structure

Abstract

A simple door-folding device comprising a housing for connecting the cabinet body, a mounting element for connecting the cabinet door, and a connecting rod mechanism and an elastic mechanism arranged on the housing, wherein the connecting rod mechanism is movably mounted on the housing to provide an opening and closing action for the cabinet door, wherein the elastic mechanism provides an elastic force for the connecting rod mechanism to automatically open or close the connecting rod mechanism relative to the housing, characterized in that the connecting rod mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod, wherein the mounting element is rotatably connected to the front ends of the first connecting rod and the second connecting rod, and wherein the rear ends of the first connecting rod and the second connecting rod are rotatably connected to the front end of the third connecting rod.wherein the middle part of the third connecting rod is rotatably connected to the housing, wherein the rear end of the third connecting rod is provided with a roller, wherein the front end of the fourth connecting rod is rotatably connected to the middle part of the second connecting rod, wherein the rear end of the fourth connecting rod is rotatably connected to the housing, wherein a force arm is arranged between the elastic mechanism and the connecting rod mechanism, wherein one end of the elastic mechanism is rotatably connected to the housing, wherein another end of the elastic mechanism is rotatably connected to the force arm, wherein one end of the force arm is rotatably connected to the housing, wherein the other end of the force arm is provided with a guide block, wherein the roller bears against the side of the guide block so that the roller moves along the side of the guide block when the connecting rod mechanism is automatically opened or closed relative to the housing.

Description

Technical area

[0001] The utility model relates to the technical field of furniture accessories and, in particular, to a door folding device of simple structure. Background technology

[0002] Many pieces of furniture currently use a hinged mechanism to open and close the cabinet door. The most common type is the hinged door, which appears to float when opened. However, to facilitate retrieving or storing items inside the cabinet, some cabinets now use a reverse hinge mechanism. These reverse hinged doors typically have a support mechanism between the door and the cabinet body to facilitate opening and closing.

[0003] For example, Chinese Patent Application No. CN118481444A proposes a concealed drop-down support device and a locker with drop-down doors. The locker includes a housing, a damper mechanism, and a connecting rod mechanism disposed within the housing. One end of the connecting rod mechanism is fixedly connected to the drop-down door, and the other end of the connecting rod mechanism transmittingly cooperates with the damper mechanism to reduce the speed of the door dropping during opening. The connecting rod mechanism includes a connecting rod and a crank, one end of the crank being rotatably connected to one end of the connecting rod.When the hinged door is opened during the downward movement, it can drive the connecting rod to set the crank in relative motion. The first pull rod is rotatably connected to the crank, so that relative movement between the crank and the connecting rod also allows relative movement between the first and second pull rods. It is understandable that the load-bearing capacity required for an upward-opening door mechanism differs from that required for a downward-opening door mechanism. The aforementioned structure is difficult to support a larger door body and must be used in conjunction with a hinge. Furthermore, the fit of the components of the aforementioned structure is very complex, and the manufacturing costs are relatively high.

[0004] Therefore, further improvements are needed. Content of the utility model

[0005] To achieve the aforementioned purpose, the utility model offers the following technical solutions: A simple door-folding device comprising a housing for connecting the cabinet body, a mounting element for connecting the cabinet door, and a connecting rod mechanism and an elastic mechanism arranged on the housing, wherein the connecting rod mechanism is movably mounted on the housing to provide an opening and closing action for the cabinet door, wherein the elastic mechanism provides an elastic force to the connecting rod mechanism to automatically open or close the connecting rod mechanism relative to the housing, wherein the connecting rod mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod, wherein the mounting element is rotatably connected to the front ends of the first connecting rod and the second connecting rod, and wherein the rear ends of the first connecting rod and the second connecting rod are rotatably connected to the front end of the third connecting rod.wherein the middle part of the third connecting rod is rotatably connected to the housing, wherein the rear end of the third connecting rod is provided with a roller, wherein the front end of the fourth connecting rod is rotatably connected to the middle part of the second connecting rod, wherein the rear end of the fourth connecting rod is rotatably connected to the housing, wherein a force arm is arranged between the elastic mechanism and the connecting rod mechanism, wherein one end of the elastic mechanism is rotatably connected to the housing, wherein another end of the elastic mechanism is rotatably connected to the force arm, wherein one end of the force arm is rotatably connected to the housing, wherein the other end of the force arm is provided with a guide block, wherein the roller bears against the side of the guide block so that the roller moves along the side of the guide block when the connecting rod mechanism is automatically opened or closed relative to the housing.

[0006] Preferably, the rear end of the first connecting rod is rotatably connected to the front end of the third connecting rod, wherein the rear end of the second connecting rod is rotatably connected to the position of the third connecting rod near the front end.

[0007] Preferably, the first connecting rod and the second connecting rod are arranged parallel to each other.

[0008] Preferably, the side of the guide block comprises a moving portion and a limiting portion, wherein the roller movably cooperates with the moving portion during the opening and closing operation of the connecting rod mechanism and abuts against the limiting portion when the connecting rod mechanism is in the open state.

[0009] Preferably, the elastic mechanism comprises a first spring seat, a second spring seat, a spring element and a positioning shaft, wherein both ends of the spring element are inserted into the first spring seat and the second spring seat respectively, and wherein the positioning shaft is arranged on the inside of the spring element.

[0010] Preferably, a force adjustment mechanism is arranged in the force arm, wherein the force adjustment mechanism comprises an active adjustment element and a slide, wherein the active adjustment element is rotatably mounted in the force arm, wherein the active adjustment element is screwed to the slide in order to drive the slide to a linear movement when the active adjustment element is rotated, wherein the elastic mechanism is pivotally connected to the slide.

[0011] Preferably, it also includes a damping mechanism for door opening, wherein the damping mechanism for door opening comprises at least one damper, wherein a swing arm is arranged between the damper and the guide block, wherein the lower end of the swing arm is rotatably connected to the housing, wherein the guide block rests against the front of the swing arm when the connecting rod mechanism is in an open state, and the rear of the swing arm rests against the damper.

[0012] Preferably, the guide block is arranged inside the force arm and the front and back of the guide block protrude from the force arm.

[0013] Preferably, the damping mechanism for door opening comprises a seat body, a slider, a first adjusting element, and a second adjusting element, wherein the seat body is attached to the housing, wherein the slider is movably arranged in the seat body along the front and rear directions, and the slider rests against the end of the damper furthest from the guide block, wherein the first adjusting element and the second adjusting element are both rotatably arranged in the seat body, wherein the first adjusting element and the slider interact via the thread to drive the slider in the front and rear directions when the first adjusting element rotates, wherein the second adjusting element engages with and is connected to the first adjusting element to drive the first adjusting element to rotate when the second adjusting element rotates.

[0014] Compared to the prior art, the technical solution has the following positive effects: The first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are combined into a connecting rod mechanism and sufficiently support most of the door body to ensure ease of use; during the closing process, the roller at the rear end of the third connecting rod acts relative to the guide block of the force arm, which simultaneously ensures the load-bearing capacity of the lower door folding device; last but not least, the structure is relatively simple and the manufacturing costs are lower. Illustration of the attached drawings Fig. Figure 1 is a schematic diagram of the main view of the structure of the utility model. Fig. Figure 2 is a schematic representation of a three-dimensional view of the structure of the utility model. Fig. Figure 3 is a schematic representation of the exploded view of the connecting rod mechanism in the utility model. Fig. Figure 4 is a schematic representation of the exploded view of the elastic mechanism in the utility model. Fig. Figure 5 is a schematic representation of the assembly of the power arm and the force adjustment mechanism in the utility model. Fig. Figure 6 is a schematic representation of the structure of the guide block in the utility model. Fig. Figure 7 is a schematic representation of the structure of the damper mechanism for door opening in the utility model.

[0015] As shown in conjunction with the description in the drawings: housing 10, mounting element 20, connecting rod mechanism 30, first connecting rod 301, second connecting rod 302, third connecting rod 303, fourth connecting rod 304, roller 305, elastic mechanism 40, first spring seat 401, second spring seat 402, spring element 403, positioning shaft 404, force arm 50, guide block 510, movement section 511, limiting section 512, force adjusting mechanism 60, active adjusting element 601, slide 602, damping mechanism for door opening 70, seat body 701, slide 702, damper 703, first adjusting element 704, second adjusting element 705, swing arm 80. Specific embodiments

[0016] The technical solution of the embodiment of the present utility model is described in detail below with reference to the attached drawings.

[0017] With reference to the Fig.1 to 7, a door-folding device of simple structure is disclosed, comprising a housing 10 for connecting the cabinet body, a mounting member 20 for connecting the cabinet door, and a connecting rod mechanism 30 and an elastic mechanism 40 arranged on the housing 10, wherein the connecting rod mechanism 30 is movably mounted on the housing 10 to provide an opening and closing action for the cabinet door, wherein the elastic mechanism 40 provides an elastic action force for the connecting rod mechanism 30 to automatically open or close the connecting rod mechanism 30 relative to the housing 10, wherein the connecting rod mechanism 30 comprises a first connecting rod 301, a second connecting rod 302, a third connecting rod 303 and a fourth connecting rod 304, wherein the mounting element 20 is rotatably connected to the front ends of the first connecting rod 301 and the second connecting rod 302, wherein the rear ends of the first connecting rod 301 and the second connecting rod 302 are rotatably connected to the front end of the third connecting rod 303, wherein the middle part of the third connecting rod 303 is rotatably connected to the housing 10, wherein the rear end of the third connecting rod 303 is provided with a roller 305, wherein the front end of the fourth connecting rod 304 is rotatably connected to the housing 10, wherein the first connecting rod 301, the second connecting rod 302, the third connecting rod 303 and the fourth connecting rod 304 are used in conjunction with each other to bear door panel loads more extensively and to ensure a user experience. wherein a force arm 50 is arranged between the elastic mechanism 40 and the connecting rod mechanism 30, wherein one end of the elastic mechanism 40 is rotatably connected to the housing 10, wherein another end of the elastic mechanism is rotatably connected to the force arm 50, wherein one end of the force arm 50 is rotatably connected to the housing 10, and wherein the other end of the force arm is provided with a guide block 510, wherein the roller 305 bears against the side of the guide block 510 so that the roller 305 moves along the side of the guide block 510 when the connecting rod mechanism 30 is automatically opened or closed relative to the housing 10; It should be known that during the closing process, the roller 305 at the rear end of the third connecting rod 303 and the guide block 510 of the force arm 50 are further optimized in the connection structure while ensuring sufficient load-bearing capacity and reducing manufacturing costs.

[0018] In particular, the rear end of the first connecting rod 301 is rotatably connected to the front end of the third connecting rod 303, the rear end of the second connecting rod 302 being rotatably connected to the position of the third connecting rod 303 near its front end, the first connecting rod 301 and the second connecting rod 302 being arranged parallel to each other. When the hinged device is opened, the connection points between the first connecting rod 301, the second connecting rod 302, the third connecting rod 303 and the mounting element 20 form a parallelogram, so that the connecting rod mechanism 30 has the advantage of a constant speed during the opening and closing process.

[0019] In particular, the side of the guide block 510 comprises a movement section 511 and a limiting section 512, wherein the roller 305 movably interacts with the movement section 511 during the opening and closing operation of the connecting rod mechanism 30, the movement section 511 of the guide block 510 providing smoother movement for the roller 305 while reducing mutual friction; wherein the roller 305 bears against the limiting section 512 when the connecting rod mechanism 30 is in the open state; wherein the limiting section 512 is arcuate to ensure that the door device provides smoother movement when it folds into the closed open state, while preventing the connecting rod mechanism 30 from folding further.

[0020] In particular, the elastic mechanism 40 comprises a first spring seat 401, a second spring seat 402, a spring element 403 and a positioning shaft 404, wherein both ends of the spring element 403 are inserted into the first spring seat 401 and the second spring seat 402 respectively, and the positioning shaft 404 is arranged on the inside of the spring element 403.

[0021] In particular, a force adjustment mechanism 60 is arranged in the force arm 50, wherein the force adjustment mechanism 60 comprises an active adjustment element 601 and a slide 602, wherein the active adjustment element 601 is rotatably mounted in the force arm 50, wherein the active adjustment element 601 is screwed to the slide 602 in order to drive the slide 602 to a linear movement when the active adjustment element 601 is rotated, wherein the elastic mechanism 40 is pivotally connected to the slide 602.

[0022] In particular, it also includes a damping mechanism for door opening 70, wherein the damping mechanism for door opening 70 comprises at least one damper 703, wherein a swing arm 80 is arranged between the damper 703 and the guide block 510, wherein the lower end of the swing arm 80 is rotatably connected to the housing 10, wherein the guide block 510 bears against the front of the swing arm 80 when the connecting rod mechanism 30 is in an open state, and the rear of the swing arm 80 bears against the damper 703, the door body is prevented from being damaged by the opening speed by providing a buffering effect to the damper 703 when the connecting rod mechanism 30 is opened.

[0023] In particular, the guide block 510 is arranged within the force arm 50, and the front and rear of the guide block 510 project from the force arm 50, so that the roller 305 slidly interacts with the guide block 510 during the rotation process. Conversely, during the rotation process, the guide block 510 pushes the swing arm 80 and acts on the damper 703 to achieve the buffer function. Neither of the two acting structures is in direct contact with the force arm 50 to avoid friction with the force arm 50 and thus prevent noise.

[0024] Preferably, the damping mechanism for door opening 70 comprises a seat body 701, a slide 702, a first adjusting element 704, and a second adjusting element 705, wherein the seat body 701 is attached to the housing 10, wherein the slide 702 is movably arranged in the seat body 701 along the front and rear directions, and the slide 702 bears against the end of the damper 703 furthest from the guide block 510, wherein the first adjusting element 704 and the second adjusting element 705 are both rotatably arranged in the seat body 701, wherein the first adjusting element 704 and the slide 702 interact via the thread to drive the slide 702 in the front and rear directions when the first adjusting element 704 rotates, wherein the second adjusting element 705 engages with and is connected to the first adjusting element 704 to actuate the first to drive adjusting element 704 to rotate when the second adjusting element 705 rotates;The damping force of the damper 703 is adjusted according to the different weights of the door body, which results in better applicability. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 118481444A

[0003]

Claims

[1] A door-folding device of simple structure, comprising a housing for connecting the cabinet body, a mounting member for connecting the cabinet door, and a connecting rod mechanism and an elastic mechanism arranged on the housing, wherein the connecting rod mechanism is movably mounted on the housing to provide an opening and closing action for the cabinet door, wherein the elastic mechanism provides an elastic action force for the connecting rod mechanism to automatically open or close the connecting rod mechanism relative to the housing, characterized bythat the connecting rod mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod, wherein the mounting element is rotatably connected to the front ends of the first connecting rod and the second connecting rod, wherein the rear ends of the first connecting rod and the second connecting rod are rotatably connected to the front end of the third connecting rod, wherein the middle part of the third connecting rod is rotatably connected to the housing, wherein the rear end of the third connecting rod is provided with a roller, wherein the front end of the fourth connecting rod is rotatably connected to the middle part of the second connecting rod, wherein the rear end of the fourth connecting rod is rotatably connected to the housing, wherein a force arm is arranged between the elastic mechanism and the connecting rod mechanism, wherein one end of the elastic mechanism is rotatably connected to the housing, wherein another end of the elastic mechanism is rotatably connected to the force arm,wherein one end of the force arm is rotatably connected to the housing, wherein the other end of the force arm is provided with a guide block, wherein the roller rests against the side of the guide block so that the roller moves along the side of the guide block when the connecting rod mechanism is automatically opened or closed relative to the housing. [2] A door folding device of simple structure according to claim 1, characterized by that the rear end of the first connecting rod is rotatably connected to the front end of the third connecting rod, wherein the rear end of the second connecting rod is rotatably connected to the position of the third connecting rod near the front end. [3] A door folding device of simple structure according to claim 1, characterized by that the first connecting rod and the second connecting rod are arranged in parallel. [4] A door folding device of simple structure according to claim 1, characterized bythat the side of the guide block comprises a moving portion and a limiting portion, wherein the roller movably cooperates with the moving portion during the opening and closing operation of the connecting rod mechanism and abuts against the limiting portion when the connecting rod mechanism is in the open state. [5] A door folding device of simple structure according to claim 1, characterized by that the elastic mechanism comprises a first spring seat, a second spring seat, a spring element and a positioning shaft, wherein both ends of the spring element are respectively inserted into the first spring seat and the second spring seat, wherein the positioning shaft is arranged on the inside of the spring element. [6] A door folding device of simple structure according to claim 1, characterized bythat a force adjustment mechanism is arranged in the force arm, wherein the force adjustment mechanism comprises an active adjustment element and a slider, wherein the active adjustment element is rotatably mounted in the force arm, wherein the active adjustment element is screwed to the slider in order to drive the slider to a linear movement when the active adjustment element is rotated, wherein the elastic mechanism is hingedly connected to the slider. [7] A door folding device of simple structure according to claim 1, characterized byin that it also comprises a damping mechanism for door opening, wherein the damping mechanism for door opening comprises at least one damper, wherein a swing arm is arranged between the damper and the guide block, wherein the lower end of the swing arm is rotatably connected to the housing, wherein the guide block abuts the front side of the swing arm when the connecting rod mechanism is in an open state, and the rear side of the swing arm abuts the damper. [8] Device for folding down the door of simple structure according to claim 7, characterized by that the guide block is located inside the power arm and the front and back of the guide block protrude from the power arm. [9] Device for folding down the door of simple structure, claim 7, characterized byin that the damping mechanism for opening the door comprises a seat body, a slider, a first adjusting element and a second adjusting element, the seat body being fastened to the housing, the slider being movably arranged in the seat body along the front and rear directions and the slider abutting the end of the damper remote from the guide block, the first adjusting element and the second adjusting element both being rotatably arranged in the seat body, the first adjusting element and the slider threadably cooperating to drive the slider in the front and rear directions when the first adjusting element rotates, the second adjusting element engaging and being connected to the first adjusting element to drive the first adjusting element for rotation when the second adjusting element rotates.

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