Adjustable force hidden upturn support device and upturn door storage cabinet

Abstract

The application discloses a hidden upturning support device with adjustable force and an upturning door storage cabinet, which comprises an outer shell body and an inner shell body, an adjusting mechanism, a spring assembly, a support arm and a connecting rod mechanism which are assembled on the inner side of the inner shell body; the outer shell body and the inner shell body are both straight strips, the outer shell body is used for being mounted on the front end edge of the side plate of a cabinet body, and the inner shell body is mounted in the outer shell body; the adjusting mechanism comprises an adjusting screw rod and an operating rod; the spring assembly comprises a lower sliding seat, a spring and an upper sliding seat, the lower sliding seat is provided with an adjusting screw hole, and the adjusting screw hole is in threaded cooperation with the adjusting screw rod; the bottom end of the support arm is hinged to the upper sliding seat, the top end is hinged to the first connecting rod of the connecting rod mechanism, and the support arm is provided with a buffer; the inner shell body and the outer shell body are provided with through holes at corresponding positions, and the through holes form receiving openings. The hidden upturning support device with adjustable force does not occupy the space in the cabinet, does not increase the width of the cabinet, and can hide the connecting rod mechanism when the door is closed, so that the cabinet is maintained beautiful.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cabinets and their accessories, and in particular to a force-adjustable hidden upturning support device and an upturning door storage cabinet using the same. BACKGROUND

[0002] At present, many wall cabinets, book cabinets, wardrobe cabinets and the like on the market are of a structure of upturning doors for opening and closing. Such cabinets need to be provided with upturning support devices to support the cabinet doors so that the cabinet doors can be in a hovering state when opened. For example, a Chinese patent publication with the application publication number CN115045576A discloses an upturning support with random stop adjustment function, which includes a support seat, a support handle, a turnover bracket, a connecting assembly, a tension spring and a lifting screw, etc. The support seat includes a seat plate, a seat plate pivot and an eccentric shaft. The support handle includes a plastic handle, a buffer oil cylinder and a U-shaped sliding block. The connecting assembly includes a connecting plate and a fixing column. With the upturning support, the cabinet door can be randomly hovered within a certain angle range, and the torque of the tension spring can be changed by the lifting screw to enter a new torque balance, so that the cabinet door can be randomly hovered within a certain angle range even if the weight of the cabinet door is changed.

[0003] However, similar to the above-mentioned existing upturning support device, the following defects still exist:

[0004] 1) The existing upturning support device is generally installed on the inner side wall of the cabinet body, which not only occupies the space inside the cabinet, but also is likely to collide with the articles or hands of the person during the article storage and retrieval process, resulting in damage to the articles or injury to the hands of the person.

[0005] 2) If the upturning support device is installed on the inner side wall of the cabinet body, many structures, especially the connecting rod part connected with the cabinet door, cannot be hidden (the same is true for the closed door state), resulting in an unsightly appearance and an increase in the width of the cabinet body, which is likely to result in an increase in the installation size (such as the width of the wall cabinet occupying the wall space) and even cannot maintain the pre-planned installation layout, causing trouble to the home layout. SUMMARY

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a force-adjustable hidden upturning support device and an upturning door storage cabinet using the same, which neither occupies the space inside the cabinet nor increases the width of the cabinet, and the connecting rod mechanism can be hidden when the door is closed, maintaining the appearance of the cabinet.

[0007] The force-adjustable hidden upturning support device of the present application is realized by the following technical scheme:

[0008] The application discloses a hidden upturning support device with adjustable force, which comprises an outer shell, an inner shell, an adjusting mechanism, a spring assembly, a support arm and a connecting rod mechanism.

[0009] The outer shell and the inner shell are both straight strips, the outer shell is used for being mounted at the front end edge of the side plate of a cabinet body, and the inner shell is mounted inside the outer shell.

[0010] The adjusting mechanism comprises an adjusting screw rod and an operating rod, both of which are fixed at the bottom of the inner shell, the operating rod is in transmission connection with the adjusting screw rod and is used for driving the adjusting screw rod to rotate.

[0011] The spring assembly comprises a lower sliding seat, a spring and an upper sliding seat, the lower sliding seat and the upper sliding seat are in sliding fit with the inner shell along the length direction of the inner shell, the spring is arranged between the lower sliding seat and the upper sliding seat, the lower sliding seat is provided with an adjusting screw hole and is in screw fit with the adjusting screw rod through the adjusting screw hole.

[0012] The connecting rod mechanism is used for connecting a cabinet door, the connecting rod mechanism comprises a first connecting rod which is hinged to the top of the inner shell, the bottom end of the support arm is hinged to the upper sliding seat, the top end of the support arm is movably connected with the first connecting rod, and the support arm is provided with a buffer.

[0013] The inner shell and the outer shell are provided with through holes at corresponding positions, so as to form receiving openings, the connecting rod mechanism is extended to the outside of the outer shell through the receiving openings or is retracted to the inside of the inner shell.

[0014] Further, the top end of the support arm is fixed with a push rod, the first connecting rod is provided with a waist-shaped hole and a fixed shaft at one side of the waist-shaped hole, and the push rod is slidably or rollably arranged in the waist-shaped hole.

[0015] The fixed shaft is used for abutting against the push rod in the extension process of the connecting rod mechanism, so that the push rod moves from one end of the waist-shaped hole to the other end of the waist-shaped hole, and the included angle between the support arm and the spring acting force is further increased.

[0016] Further, the connection mode between the top end of the support arm and the first connecting rod is hinged.

[0017] Further, the support arm comprises two clamping rods, the buffer is arranged between the two clamping rods, the buffer is provided with a buffer sleeve at the outer side, a buffer pad is connected with a piston rod of the buffer, and the buffer pad is fixed with the clamping rods.

[0018] Further, the side of the lower sliding seat is provided with a height scale, the height scale is provided with a plurality of marks for indicating the relative height of the lower sliding seat, the marks are arranged in a straight line from top to bottom, the side of the inner shell is provided with an opening for exposing the height scale, and the side of the outer shell is provided with an observation hole for observing the marks.

[0019] Further, the operating rod is rotationally connected to the inner shell, the operating rod comprises an outer end and an inner end, the outer end faces the outside of the inner shell, the inner end is provided with a driving gear part, the bottom end of the adjusting screw is provided with a driven gear part, the driving gear part is engaged with the driven gear part, and the side of the outer shell is provided with an operating hole corresponding to the outer end of the operating rod.

[0020] Further, the observation hole and the operating hole are located on the front side of the outer shell, the back side of the outer shell is provided with a connecting hole, the inner shell is provided with a screw hole corresponding to the connecting hole, the connecting hole and the screw hole are used to simultaneously access a screw fastener, so as to fix the inner shell and the outer shell.

[0021] Further, the connecting seat is hingedly connected to the fourth connecting rod.

[0022] The upturned door storage cabinet adopts the following technical scheme:

[0023] The upturned door storage cabinet comprises a cabinet body and a cabinet door hingedly connected to the cabinet body, and the hidden upturning supporting device.

[0024] Further, the receiving opening is located on the front side of the outer shell, the back side of the outer shell is provided with a plug-in strip arranged along the length direction of the outer shell, the front end edge of the cabinet side plate is provided with a plug-in groove, the plug-in strip is plugged into the plug-in groove and fixed by glue, so as to fix the hidden upturning supporting device and the cabinet body.

[0025] Compared with the prior art, the upturned door storage cabinet has the following beneficial effects:

[0026] The hidden upturning supporting device and the upturned door storage cabinet adopting the same provided by the present application do not occupy the space in the cabinet and do not increase the width of the cabinet, and the connecting rod mechanism can be hidden when the door is closed, so that the appearance of the cabinet is maintained. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Structure diagram of the upturning door storage cabinet of the embodiment of the present application;

[0028] Figure 2 Structure diagram of the cabinet body of the upturning door storage cabinet of the embodiment of the present application;

[0029] Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0030] Figure 4 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0031] Figure 5 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 4 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0032] Figure 6 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0033] Figure 7 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0034] Figure 8 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0035] Figure 9 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0036] Figure 10 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0037] Figure 11 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application; Figure 3 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0038] Figure 12 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0039] Figure 13 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0040] Figure 14 Structure diagram of the adjustable force-concealed upturning support device of the embodiment of the present application;

[0041] Figure 15 Sectional view of the hidden upturning support device when the cabinet door is unfolded to 90 degrees.

[0042] In the figure: 100, hidden upturning support device; 101, storage opening; 200, cabinet body; 201, plug-in slot; 300, cabinet door; 1, outer shell; 11, operation hole; 12, observation hole; 13, connecting hole; 14, plug-in strip; 2, inner shell; 21, opening; 22, screw hole; 23, iron layer; 24, plastic layer; 3, adjusting mechanism; 31, adjusting screw; 32, operation rod; 33, driving gear part; 34, driven gear part; 35, return spring; 4, spring assembly; 41, lower sliding seat; 42, spring; 43, upper sliding seat; 44, adjusting screw hole; 45, height scale; 5, support arm; 51, buffer; 52, push rod; 53, synchronous shaft; 54, push rod body; 55, rolling sleeve; 56, clamping rod; 57, buffer sleeve; 58, buffer pad; 6, connecting rod mechanism; 61, first connecting rod; 62, second connecting rod; 63, third connecting rod; 64, fourth connecting rod; 65, connecting seat; 66, waist-shaped hole; 67, fixed shaft. DETAILED DESCRIPTION

[0043] In the following, the application will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0044] REFERENCE Figures 1-15 The application provides a hidden upturning support device with adjustable force and an upturning door storage cabinet using the same.

[0045] The upturning door storage cabinet of the application comprises a cabinet body 200, a cabinet door 300 hingedly connected to the cabinet body 200, and a hidden upturning support device 100 with adjustable force. The hidden upturning support device 100 comprises an outer shell 1, an inner shell 2, an adjusting mechanism 3, a spring assembly 4, a support arm 5 and a connecting rod mechanism 6 arranged inside the inner shell 2. The outer shell 1 is designed as a straight strip and is arranged at the front end edge of the side plate of the cabinet body 200, and the inner shell 2 is arranged inside the outer shell 1.

[0046] In the hidden upturn support device 100, the adjusting mechanism 3 comprises an adjusting screw 31 and an operating rod 32, both of which are fixed at the bottom of the inner housing 2, the operating rod 32 is in transmission connection with the adjusting screw 31 and is used for driving the adjusting screw 31 to rotate. Specifically, the operating rod 32 is in rotational cooperation with the inner housing 2, the operating rod 32 comprises an outer end and an inner end, the outer end faces the outside of the inner housing 2, and the outer end of the operating rod 32 is in the form of a screw head (such as a cross screw head, a straight screw head, etc.), the inner end of the operating rod 32 is provided with a driving gear part 33, the bottom end of the adjusting screw 31 is provided with a driven gear part 34, the driving gear part 33 is in mesh with the driven gear part 34, and the side of the outer housing 1 is provided with an operating hole 11 corresponding to the outer end of the operating rod 32. In addition, the adjusting mechanism 3 further comprises a return spring 35.

[0047] In the hidden upturn support device 100, the spring assembly 4 comprises a lower sliding seat 41, a spring 42 (a compression spring is adopted in the embodiment) and an upper sliding seat 43, the lower sliding seat 41 and the upper sliding seat 43 are in sliding cooperation with the inner housing 2 along the length direction of the inner housing 2, the spring 42 is arranged between the lower sliding seat 41 and the upper sliding seat 43, the lower sliding seat 41 is provided with an adjusting screw hole 44, and the adjusting screw hole 44 is in threaded cooperation with the adjusting screw 31.

[0048] In the hidden upturn support device 100, the bottom end of the support arm 5 is hinged to the upper sliding seat 43, the connecting rod mechanism 6 is used for connecting the cabinet door 300, and the connecting rod mechanism 6 comprises a first connecting rod 61 hinged to the top of the inner housing 2, and the top end of the support arm 5 is movably connected to the first connecting rod 61. In addition, the connecting rod mechanism 6 further comprises a second connecting rod 62, a third connecting rod 63, a fourth connecting rod 64 and a connecting seat 65 used for connecting the cabinet door 300, both ends of the second connecting rod 62 are hinged to the first connecting rod 61 and the fourth connecting rod 64 respectively, both ends of the third connecting rod 63 are hinged to the first connecting rod 61 and the fourth connecting rod 64 respectively, so that the first connecting rod 61, the second connecting rod 62, the third connecting rod 63 and the fourth connecting rod 64 form a planar four-connecting rod mechanism, and the connecting seat 65 is hinged to the end of the fourth connecting rod 64.

[0049] Specifically, the support arm 5 comprises two clamping rods 56, the buffer 51 is arranged between the two clamping rods 56, the outer side of the buffer 51 is provided with a buffer sleeve 57, the piston rod of the buffer 51 is connected with a buffer pad 58, and the buffer pad 58 is fixed with the clamping rod 56.

[0050] In the hidden upturn support device 100 of the embodiment of the present application, the inner shell 2 and the outer shell 1 are provided with through holes at corresponding positions to form receiving openings 101, and the connecting rod mechanism 6 extends to the outside of the outer shell 1 through the receiving openings 101 or shrinks to the inside of the inner shell 2. In this way, the connecting rod mechanism 6 and the like can be hidden when the cabinet door 300 is in the closed state, thus maintaining the appearance of the cabinet.

[0051] In the hidden upturn support device 100 of the embodiment of the present application, the side of the lower slide base 41 is provided with a height scale 45, and the height scale 45 is provided with a plurality of marks (such as numbers, letters or Chinese characters, etc., which essentially adjust the spring force) for indicating the relative height of the lower slide base 41, and the marks are arranged in a straight line from top to bottom. The side of the inner shell 2 is provided with an opening 21 for exposing the height scale 45, and the side of the outer shell 1 is provided with an observation hole 12 for observing the marks. In this way, when the user rotates the operating rod 32 at the operating hole 11 with a screwdriver, the user can know the relative height or relative position (or spring force) of the lower slide base 41 by observing the marks displayed through the observation hole 12. In this way, the user can be assisted in adjusting the spring force, and the operation is simple and the setting is ingenious.

[0052] In the hidden upturn support device 100 of the embodiment of the present application, the observation hole 12 and the operating hole 11 are located at the front position of the outer shell 1, and the back of the outer shell 1 is provided with a connecting hole 13. The inner shell 2 is provided with a screw hole 22 at a position corresponding to the connecting hole 13, and the connecting hole 13 and the screw hole 22 are used to simultaneously access a screw fastener (such as a screw or a bolt), so as to fix the inner shell 2 and the outer shell 1. In this way, the observation hole 12 and the operating hole 11 are located at the front position of the outer shell 1, which is convenient for observation and operation. The connecting hole 13 is located at the back position of the outer shell 1, so it will not be confused. Because the outer end of the operating rod 32 has a screw head structure, if the connecting hole 13 is also located at the front, it is easy to be confused, which may cause operation errors.

[0053] In the hidden upturn support device 100 of the embodiment of the present application, the connection between the top end of the support arm 5 and the first connecting rod 61 is hinged. This is a conventional setting method, but it may not always work in the present application. Because the hidden upturn support device 100 of the present application is to be installed at the front end edge of the side plate of the cabinet body 200, the height of the side plate is sometimes relatively small, and the thickness is generally not large. This means that in order to achieve this installation method, the hidden upturn support device 100 needs to be made sufficiently light and small in size and weight, which limits the size of the torque of the spring.

[0054] In order to further increase the size of the spring moment while reducing the volume and weight as much as possible, the hidden upturning support device 100 of the embodiment of the present application is designed as follows: the top end of the support arm 5 is fixed with a push rod 52, the first connecting rod 61 is provided with a waist-shaped hole 66 and a fixed shaft 67 on one side of the waist-shaped hole 66, and the push rod 52 is slidingly or rollingly assembled into the waist-shaped hole 66; wherein the fixed shaft 67 is used to push against the push rod 52 during the extension of the connecting rod mechanism 6, so that the push rod 52 runs from one end of the waist-shaped hole 66 to the other end of the waist-shaped hole 66, thereby further increasing the included angle between the support arm 5 and the spring acting force; thus the spring moment can be further increased.

[0055] Reference Figure 9 The push rod 52 designed to slide includes a synchronous shaft 53 and two push rod bodies 54, the two push rod bodies 54 are spliced on the synchronous shaft 53, and the synchronous shaft 53 is further connected with the support arm 5; in this way, the circular table protruding from the outer side of the push rod body 54 is slidingly matched with the waist-shaped hole 66.

[0056] Reference Figure 10 The push rod 52 designed to roll includes a synchronous shaft 53, two push rod bodies 54 and two rolling sleeves 55, the two rolling sleeves 55 are rotatably assembled on the synchronous shaft 53 and located on the two sides of the push rod body 54; in this way, the rolling sleeves 55 are rollingly matched with the waist-shaped hole 66. The advantage of the rolling design is that the rolling mode is not easy to wear, so that the push rod 52 is durable and has a long service life.

[0057] In the hidden upturning support device 100 of the embodiment of the present application, the outer shell 1 is made of aluminum profile; the inner shell 2 includes an outer iron layer 23 and an inner plastic layer 24.

[0058] The upturning door storage cabinet of the embodiment of the present application includes a cabinet body 200, a cabinet door 300 hingedly connected with the cabinet body 200, and the hidden upturning support device 100 described in the embodiment, the outer shell 1 of which is fixedly installed at the front end edge of the side plate of the cabinet body 200, and the connecting rod mechanism 6 of which is connected with the cabinet door 300; wherein the receiving opening 101 is located at the front face of the outer shell 1, the back face of the outer shell 1 is provided with a plug-in strip 14 arranged along the length direction thereof, and the front end edge of the side plate of the cabinet body 200 is provided with a plug-in groove 201, the plug-in strip 14 is plugged into the plug-in groove 201 and fixed by glue, so as to fix the hidden upturning support device 100 and the cabinet body 200.

[0059] The adjustable-force hidden upturning support device of the embodiment of the present application and the upturning door storage cabinet using the same have the following advantages:

[0060] 1) The concealed upward-folding support device is installed on the front edge of the cabinet side panel. This will not take up the cabinet space or increase the cabinet width. It will not affect the installation size or home layout, and will maintain the aesthetics of the cabinet.

[0061] 2) The concealed upward-opening support device is installed on the front edge of the cabinet side panel, with the observation and operation holes on the front. This makes adjustment and observation very easy. If the upward-opening support device is installed inside the cabinet, it will cause many inconveniences: for example, you need to stick your head into the cabinet to observe and operate it, which is inconvenient in itself, and the narrow and dark space inside the cabinet will further increase the difficulty. Incorrect adjustment may also pose a risk of the cabinet door falling down and hitting your head, which is very inconvenient. For example, if the spring tension needs to be increased due to long-term use and spring aging, the items inside the cabinet must be taken out first, adjusted, and then put back into the cabinet, which is very troublesome.

[0062] 3) The installation of the concealed upward-folding support device is very simple; it can be secured with glue.

[0063] 4) In order to be suitable for installation on the front edge of the cabinet side panel and to be compatible with the glue-bonding installation method, the device needs to be designed to be lightweight enough. However, this may lead to insufficient spring torque. Therefore, the present invention increases the angle between the support arm and the spring force by setting an oblong hole and a fixed shaft on the first connecting rod and adding a push rod at the top of the support arm. This increases the spring torque. At the same time, since the oblong hole and the fixed shaft are set on the first connecting rod, and the oblong hole is a hollow structure, the weight can be reduced. The push rod does not need to be very large, as long as it can abut against the fixed shaft. In summary, it has virtually no impact on the overall size and weight of the hidden flip-up support device.

[0064] The adjustable force concealed upward-opening support device and the upward-opening door storage cabinet using the concealed upward-opening support device of this invention operate on the following principle:

[0065] 1) In the case of the top-opening storage cabinet of the present invention, when the cabinet door is opened to a range of 0-30 degrees, the cabinet door is in a state that can automatically and softly close. When the cabinet door is opened to a range of 30-90 degrees, the cabinet door is in a state that can be freely suspended. When the cabinet door is opened to a range of 45 degrees, the push rod and the fixed column begin to abut. When the cabinet door is gradually opened from 45 degrees to 90 degrees, the push rod gradually moves from one end to the other end in the oblong hole. During this process, the spring torque gradually increases.

[0066] 2) When opening the cabinet door, simply pull it up to between 30 and 90 degrees; when closing the cabinet door, lower it to within 30 degrees, and the cabinet door will automatically close with a buffer.

[0067] The above embodiments are only the preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art based on the present application shall fall within the scope of protection of the present application.

Claims

1. An adjustable force-concealed upward-flipping support device, characterized in that, It includes an outer shell and an inner shell, as well as an adjustment mechanism, spring assembly, support arm and linkage mechanism assembled inside the inner shell; Both the outer shell and the inner shell are straight strips. The outer shell is used to be installed on the front edge of the cabinet side panel, and the inner shell is installed inside the outer shell. The adjustment mechanism includes an adjustment screw and an operating rod, both of which are fixed at the bottom of the inner housing. The operating rod is connected to the adjustment screw and is used to drive the adjustment screw to rotate. The spring assembly includes a lower slide seat, a spring, and an upper slide seat. The lower slide seat and the upper slide seat are in sliding engagement with the inner housing along the length of the inner housing. The spring is disposed between the lower slide seat and the upper slide seat. The lower slide seat is provided with an adjusting screw hole and is in threaded engagement with the adjusting screw through the adjusting screw hole. The linkage mechanism is used to connect the cabinet door. The linkage mechanism includes a first link hinged to the top of the inner shell, the bottom end of the support arm is hinged to the upper slide, the top end of the support arm is movably connected to the first link, and the support arm is provided with a buffer. The inner shell and the outer shell are provided with through holes at corresponding positions, thereby forming a storage opening. The linkage mechanism extends to the outside of the outer shell or retracts into the inside of the inner shell through the storage opening. A push rod is fixed to the top of the support arm. The first connecting rod is provided with an oblong hole and a fixed shaft on one side of the oblong hole. The push rod is slidably or rollingly assembled into the oblong hole. The fixed shaft is used to hold the push rod in place during the extension of the linkage mechanism, so that the push rod moves from one end of the waist-shaped hole to the other end of the waist-shaped hole, thereby further increasing the angle between the support arm and the spring force. The support arm includes two clamping rods, the buffer is disposed between the two clamping rods, a buffer sleeve is disposed on the outside of the buffer, the piston rod of the buffer is connected to a buffer pad, and the buffer pad is fixed to the clamping rods; A height gauge is provided on the side of the sliding seat, and several markings are provided on the height gauge to indicate the relative height of the sliding seat. The markings are arranged in a straight line from top to bottom. An opening is provided on the side of the inner shell to expose the height gauge, and an observation hole is provided on the side of the outer shell to observe the markings. The linkage mechanism further includes a second link, a third link, and a fourth link, and a connecting seat for connecting with the cabinet door. The two ends of the second link are hinged to the first link and the fourth link, respectively. The two ends of the third link are hinged to the first link and the fourth link, respectively, so that the first link, the second link, the third link, and the fourth link form a planar four-bar linkage mechanism. The connecting seat is hinged to the end of the fourth link.

2. The concealed upward-flipping support device as described in claim 1, characterized in that, The connection between the top of the support arm and the first connecting rod is a hinge.

3. The concealed upward-flipping support device as described in claim 1, characterized in that, The operating lever is rotatably engaged with the inner housing. The operating lever includes an outer end and an inner end, with the outer end facing the outside of the inner housing and the inner end provided with a driving gear. The bottom end of the adjusting screw is provided with a driven gear. The driving gear and the driven gear mesh. The side of the outer housing is provided with an operating hole corresponding to the outer end of the operating lever.

4. The concealed upward-flipping support device as described in claim 3, characterized in that, The observation hole and the operation hole are located on the front of the outer shell. A connection hole is provided on the back of the outer shell. A screw hole is provided on the inner shell at the position corresponding to the connection hole. The connection hole and the screw hole are used to simultaneously connect screw fasteners, thereby fixing the inner shell and the outer shell.

5. A top-opening door storage cabinet, characterized in that, It includes a cabinet body and a cabinet door hinged thereto, and a concealed upward-folding support device as described in any one of claims 1-4, wherein the outer shell is fixedly installed on the front edge of the side panel of the cabinet body, and its linkage mechanism is connected to the cabinet door.

6. The upward-opening door storage cabinet as described in claim 5, characterized in that, The storage opening is located on the front of the outer shell. The back of the outer shell is provided with a connector strip along its length, and the front edge of the cabinet side panel is provided with a connector groove. The connector strip is inserted into the connector groove and fixed with glue to fix the hidden flip-up support device and the cabinet.

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