CN220849275U - Hidden upturning supporting device with adjustable force and upturning door storage cabinet - Google Patents

Abstract

The utility model discloses a hidden upturning supporting device with adjustable force and an upturning door locker, comprising an outer shell, an inner shell, and an adjusting mechanism, a spring assembly, a supporting arm and a connecting rod mechanism which are assembled on the inner side of the inner shell; the outer shell and the inner shell are both in straight strips, the outer shell is used for being installed at the front edge of the side plate of the cabinet, and the inner shell is installed inside the outer shell; 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, wherein the lower sliding seat is provided with an adjusting screw hole, and the lower sliding seat and the adjusting screw rod form threaded fit through the adjusting screw hole; the bottom end of the supporting arm is hinged with the upper sliding seat, the top end of the supporting arm is hinged with a first connecting rod of the connecting rod mechanism, and the supporting arm is provided with a buffer; the inner shell and the outer shell are provided with through holes at corresponding positions to form a containing opening. The hidden upturning support device with adjustable force does not occupy the space in the cabinet or increase the width of the cabinet, and can hide the link mechanism when the door is closed, thereby maintaining the attractive appearance of the cabinet.

Description

Hidden upturning supporting device with adjustable force and upturning door storage cabinet

Technical Field

The utility model relates to the technical field of cabinets and accessories thereof, in particular to a hidden upward-turning supporting device with adjustable force and an upward-turning door locker adopting the hidden upward-turning supporting device.

Background

At present, wall cabinets, bookcases, wardrobe cabinets and the like on the market are not limited to adopting the structure form of an upturned door for opening and closing, and the cabinet is required to be provided with the upturned supporting device for supporting the cabinet door, so that the cabinet door can be in a hovering state when being opened. For example, chinese patent publication No. CN115045576a proposes an upturning support with optional stop adjustment, which includes a support base, a support handle, an upturning bracket, a connection assembly, a tension spring, a lifting screw, and other components; the supporting seat comprises a seat plate, a seat plate rotating shaft and an eccentric shaft; the support handle comprises a plastic handle, a buffer oil cylinder and a U-shaped sliding block; the connecting assembly comprises a connecting plate and a fixing column. By adopting the upturning support, the cabinet door can hover randomly within a certain angle range, the tension moment of the tension spring can be changed through the lifting screw, new moment balance can be achieved, and even if the weight of the cabinet door is changed, the cabinet door can hover randomly within a certain angle range.

However, similar to the above-described existing upturned support devices, there are still the following drawbacks:

1) The existing upturning supporting device is generally arranged on the inner side wall of the cabinet body, not only occupies the space in the cabinet, but also is easy to collide with articles or hands of people in the process of article storage and taking, so that the articles are damaged or the hands of people are injured.

2) If the upturning support device is mounted 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 in the door closing state), so that the appearance is unsightly, the width of the cabinet body is increased, the mounting size is easily increased (for example, the wall space occupied by the wall cabinet is wide), even the prior mounting layout cannot be maintained, and the household layout is troublesome.

Disclosure of utility model

In order to overcome the defects in the prior art, the utility model aims to provide the hidden upward-turning support device with adjustable force and the upward-turning door locker adopting the hidden upward-turning support device, which do not occupy the space in the cabinet or increase the width of the cabinet, and can hide the link mechanism when the door is closed, so that the attractive appearance of the cabinet is maintained.

The force-adjustable hidden upturning supporting device is realized by the following technical scheme:

a hidden upturning supporting device with adjustable force comprises an outer shell, an inner shell, an adjusting mechanism, a spring assembly, a supporting arm and a connecting rod mechanism, wherein the adjusting mechanism, the spring assembly, the supporting arm and the connecting rod mechanism are assembled on the inner side of the inner shell;

The outer shell and the inner shell are both in straight strips, the outer shell is used for being installed at the front end edge of the side plate of the cabinet body, and the inner shell is installed inside the outer shell;

the adjusting mechanism comprises an adjusting screw and an operating rod, the positions of the adjusting screw and the operating rod are fixed at the bottom of the inner shell, and the operating rod is in transmission connection with the adjusting screw and is used for driving the adjusting screw to rotate;

The spring assembly comprises a lower sliding seat, a spring and an upper sliding seat, wherein the lower sliding seat and the upper sliding seat form 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, and the lower sliding seat is provided with an adjusting screw hole and forms threaded fit with the adjusting screw rod through the adjusting screw hole;

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

The inner shell and the outer shell are provided with through holes at corresponding positions so as to form a containing opening, and the link mechanism extends to the outside of the outer shell or contracts to the inside of the inner shell through the containing opening.

Further, a push rod is fixed at the top end of the supporting arm, the first connecting rod is provided with a kidney-shaped hole and a fixed shaft positioned at one side of the kidney-shaped hole, and the push rod is slidably or rollably assembled in the kidney-shaped hole;

The fixed shaft is used for supporting the push rod in the stretching process of the connecting rod mechanism, so that the push rod moves from one end of the kidney-shaped hole to the other end of the kidney-shaped hole, and the included angle between the supporting arm and the acting force of the spring is further increased.

Further, the top end of the supporting arm is hinged with the first connecting rod.

Further, the support arm includes two clamp bars, the buffer sets up between two clamp bars, the outside of buffer is provided with the cushion collar, the piston rod of buffer is connected with the cushion, the cushion is fixed with the clamp bar.

Further, the lateral part of lower slide is provided with the altitude chi, be provided with a plurality of marks that are used for showing the relative height of lower slide on the altitude chi, just the sign is upper and lower straight line arrangement setting, the lateral part of interior casing is provided with and is used for showing the trompil of altitude chi, the lateral part of shell body is provided with the observation hole that is used for observing the sign.

Further, the operating lever is in running fit with the inner shell, the operating lever 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 meshed with the driven gear part, and the side part of the outer shell is provided with an operating hole corresponding to the outer end of the operating lever.

Further, the observation hole and the operation hole are located at the front position of the outer casing, a connecting hole is formed in the back of the outer casing, a screw hole is formed in the position, corresponding to the connecting hole, of the inner casing, and the connecting hole and the screw hole are used for being connected with screw fasteners at the same time, so that the inner casing and the outer casing are fixed.

Further, the link mechanism further comprises a second link, a third link, a fourth link and a connecting seat used for being connected with the cabinet door, two ends of the second link are hinged with the first link and the fourth link respectively, two ends of the third link are hinged with 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 plane four-link mechanism, and the connecting seat is hinged at the tail end of the fourth link.

The utility model discloses an upturned door locker which is realized by adopting the following technical scheme:

An upturning door storage cabinet comprises a cabinet body, a cabinet door hinged with the cabinet body, and the hidden upturning support device, wherein an outer shell of the hidden upturning support device is fixedly arranged at the front edge of a side plate of the cabinet body, and a connecting rod mechanism of the hidden upturning support device is connected with the cabinet door.

Further, the storage opening is located at the front position of the outer shell, the back of the outer shell is provided with a plugging strip arranged along the length direction of the outer shell, the front edge of the side plate of the cabinet body is provided with a plugging groove, and the plugging strip is plugged into the plugging groove and fixed through glue, so that the hidden upturning supporting device is fixed with the cabinet body.

Compared with the prior art, the utility model has the beneficial effects that:

the hidden upturning support device with adjustable force and the upturning door locker adopting the hidden upturning support device provided by the utility model do not occupy the space in the cabinet or increase the width of the cabinet, and can hide the link mechanism when the door is closed, so that the attractive appearance of the cabinet is maintained.

Drawings

FIG. 1 is a schematic diagram of a door locker according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of a cabinet body of an upturned door locker according to an embodiment of the utility model;

FIG. 3 is a schematic view of a force-adjustable hidden upturning support device according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the hidden upturning support device shown in FIG. 3 with the outer housing omitted;

FIG. 5 is a schematic view of the hidden flip-up support device of FIG. 4 with the iron layer omitted;

FIG. 6 is an exploded view of the hidden flip-up support shown in FIG. 3;

FIG. 7 is a mating block diagram of an adjustment mechanism of the hidden flip-up support shown in FIG. 3;

FIG. 8 is a schematic structural view of a lower carriage of the hidden upturning support device shown in FIG. 3 and a mating structure of the lower carriage and an adjusting screw;

FIG. 9 is a schematic diagram of a design one of the push rod of the hidden upturning support device shown in FIG. 3;

FIG. 10 is a schematic diagram of a second design of the push rod of the hidden flip-up support device shown in FIG. 3;

FIG. 11 is an exploded view of the support arm and first link of the hidden flip-up support device of FIG. 3;

FIG. 12 is a cross-sectional view of the hidden upturning support device when the cabinet door is closed (when the cabinet door is unfolded at an angle of 0 degrees);

FIG. 13 is a cross-sectional view of the hidden upturned support apparatus with the cabinet door extended to 18 degrees;

FIG. 14 is a cross-sectional view of the hidden upturned support device with the cabinet door unfolded to 45 degrees;

Fig. 15 is a cross-sectional view of the hidden upturned support device with the cabinet door unfolded to 90 degrees.

In the figure: 100. a hidden upturning support device; 101. a storage port; 200. a cabinet body; 201. a plug-in groove; 300. a cabinet door; 1. an outer housing; 11. an operation hole; 12. an observation hole; 13. a connection hole; 14. a plug strip; 2. an inner housing; 21. opening holes; 22. screw holes; 23. an iron layer; 24. a plastic layer; 3. an adjusting mechanism; 31. adjusting a screw; 32. an operation lever; 33. a driving gear portion; 34. a driven gear section; 35. a return spring; 4. a spring assembly; 41. a lower slide; 42. a spring; 43. an upper slider; 44. adjusting the screw hole; 45. a height ruler; 5. a support arm; 51. a buffer; 52. a push rod; 53. a synchronizing shaft; 54. a push rod main body; 55. a rolling sleeve; 56. a clamping rod; 57. a buffer sleeve; 58. buffering cushion blocks; 6. a link mechanism; 61. a first link; 62. a second link; 63. a third link; 64. a fourth link; 65. a connecting seat; 66. waist-shaped holes; 67. and a fixed shaft.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

Reference is made to fig. 1-15. The embodiment of the utility model provides a hidden upward-turning supporting device with adjustable force and an upward-turning door locker adopting the hidden upward-turning supporting device.

The upturned door locker of the embodiment of the utility model comprises a locker body 200, a locker door 300 hinged with the locker body 200 and a hidden upturned supporting device 100 with adjustable force. The hidden upturning support device 100 comprises an outer shell 1 and an inner shell 2, an adjusting mechanism 3, a spring assembly 4, a supporting arm 5 and a connecting rod mechanism 6 which are assembled on the inner side of the inner shell 2; since the hidden upturning support device 100 of the embodiment of the present utility model is to be installed at the front end edge of the side plate of the cabinet 200, for convenience, the outer casing 1 and the inner casing 2 are both designed to be straight, the outer casing 1 is used to be installed at the front end edge of the side plate of the cabinet 200, and the inner casing 2 is installed inside the outer casing 1.

In the hidden upturning support device 100 according to the embodiment of the present utility model, the adjusting mechanism 3 includes an adjusting screw 31 and an operating rod 32, where the positions of the adjusting screw 31 and the operating rod 32 are fixed at the bottom of the inner casing 2, and 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 running fit with the inner housing 2, the operating rod 32 includes 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 a screw head structure (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 portion 33, the bottom end of the adjusting screw 31 is provided with a driven gear portion 34, the driving gear portion 33 is meshed with the driven gear portion 34, and the side portion 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 includes a return spring 35.

In the hidden upturning support device 100 according to the embodiment of the present utility model, the spring assembly 4 includes a lower slider 41, a spring 42 (a compression spring is adopted in this embodiment), and an upper slider 43, wherein the lower slider 41 and the upper slider 43 form a sliding fit with the inner housing 2 along the length direction of the inner housing 2, the spring 42 is disposed between the lower slider 41 and the upper slider 43, the lower slider 41 is provided with an adjustment screw hole 44, and the adjustment screw hole 44 forms a threaded fit with the adjustment screw 31.

In the hidden upturning support device 100 according to the embodiment of the present utility model, the bottom end of the support arm 5 is hinged with the upper sliding seat 43, the link mechanism 6 is used for connecting the cabinet door 300, the link mechanism 6 comprises a first link 61 hinged to the top of the inner housing 2, and the top end of the support arm 5 is movably connected with the first link 61; the supporting arm 5 is provided with the buffer 51, when the cabinet door is closed, the buffer 51 is extruded by the first connecting rod 61, so that a buffering effect can be achieved, and a buffering closing effect is achieved. In addition, the link mechanism 6 further includes a second link 62, a third link 63, and a fourth link 64, and a connection base 65 for connection with the cabinet door 300, both ends of the second link 62 are respectively hinged with the first link 61 and the fourth link 64, both ends of the third link 63 are respectively hinged with the first link 61 and the fourth link 64, so that the first link 61, the second link 62, the third link 63, and the fourth link 64 constitute a planar four-bar mechanism, and the connection base 65 is hinged at the end of the fourth link 64.

Specifically, the support arm 5 includes two clamping bars 56, the buffer 51 is disposed between the two clamping bars 56, a buffer sleeve 57 is disposed on the outer side of the buffer 51, a piston rod of the buffer 51 is connected with a buffer cushion block 58, and the buffer cushion block 58 is fixed with the clamping bars 56.

In the hidden upturning support device 100 of the embodiment of the present utility model, through holes are provided at corresponding positions of the inner case 2 and the outer case 1, so that a receiving port 101 is formed, and the link mechanism 6 extends to the outside of the outer case 1 through the receiving port 101 or contracts to the inside of the inner case 2; by this arrangement, the link mechanism 6 and the like can be hidden when the cabinet door 300 is in the closed state, and the beautiful appearance of the cabinet can be maintained.

In the hidden upturning support device 100 according to the embodiment of the present utility model, the side portion of the lower slide 41 is provided with the height ruler 45, the height ruler 45 is provided with a plurality of marks (such as numerals, letters or chinese characters, etc., which essentially adjust the spring force) for indicating the relative height of the lower slide 41, the marks are arranged in a vertical line, the side portion of the inner housing 2 is provided with the opening 21 for exposing the height ruler 45, and the side portion of the outer housing 1 is provided with the observation hole 12 for observing the marks. So arranged, when the user rotates the operation rod 32 at the operation hole 11 by using the screwdriver, the relative height or the relative position (also called spring force) of the current lower slide 41 can be known by observing the mark displayed by the hole 12; the spring force adjusting device can assist a user in adjusting spring force, and is simple and convenient to operate and ingenious in setting.

In the hidden upturning support device 100 according to the embodiment of the present utility model, the observation hole 12 and the operation hole 11 are located at the front position of the outer casing 1, the back surface of the outer casing 1 is provided with the connection hole 13, the inner casing 2 is provided with the screw hole 22 at the position corresponding to the connection hole 13, and the connection hole 13 and the screw hole 22 are used for simultaneously inserting screw fasteners (such as screws or bolts), so that the inner casing 2 and the outer casing 1 are fixed; so arranged, the observation hole 12 and the operation hole 11 are positioned at the front position of the outer shell 1, which is convenient for observation and operation; the connection hole 13 is located at the rear side of the outer case 1, so that confusion is not generated, because the outer end of the operating lever 32 has a screw head structure, and if the connection hole 13 is also located at the front side, confusion is easily generated, resulting in an operation error.

In the hidden upturning support device 100 according to the embodiment of the present utility model, the top end of the support arm 5 is hinged to the first link 61; this is a conventional arrangement, but is sometimes not practical in the present utility model, because the hidden upturned support apparatus 100 of the present utility model is to be mounted on the front edge of the side plate of the cabinet 200, the height of the side plate is sometimes small, and the thickness is generally not large, which means that to implement this mounting, the hidden upturned support apparatus 100 is to be set to be light enough (volume, weight are as small as possible), which limits the moment of the spring.

In order to further increase the spring moment and reduce the influence on the volume and the weight as much as possible, the hidden upturning support device 100 according to the embodiment of the present utility model is designed as follows: the top end of the supporting 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 positioned at one side of the waist-shaped hole 66, and the push rod 52 is assembled in the waist-shaped hole 66 in a sliding or rolling way; wherein the fixed shaft 67 is used for supporting the push rod 52 in the extending process of the link mechanism 6, so that the push rod 52 moves from one end of the kidney-shaped hole 66 to the other end of the kidney-shaped hole 66, and the included angle between the supporting arm 5 and the acting force of the spring is further increased; thus a further increase in the spring moment can be achieved.

Referring to fig. 9, the push rod 52 adopting the sliding design comprises a synchronizing shaft 53 and a push rod main body 54, wherein the two push rod main bodies 54 are spliced on the synchronizing shaft 53, and the synchronizing shaft 53 is also connected with the supporting arm 5; so arranged, the boss protruding from the outside of the push rod body 54 is in sliding engagement with the kidney-shaped hole 66.

Referring to fig. 10, the push rod 52 adopting a rolling design includes a synchronizing shaft 53, a push rod body 54, and two rollers 55 rotatably mounted on the synchronizing shaft 53 and located at both sides of the push rod body 54; so configured, the rollers 55 are in rolling engagement with the kidney-shaped apertures 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 long service life.

In the hidden upturning support device 100 of the embodiment of the present utility model, the outer casing 1 adopts an aluminum profile; the inner shell 2 comprises an outer ferrous layer 23 and an inner plastic layer 24.

The utility model relates to an upturning door locker, which comprises a locker body 200, a locker door 300 hinged with the locker body, and a hidden upturning supporting device 100, wherein a shell 1 of the hidden upturning supporting device is fixedly arranged at the front edge of a side plate of the locker body 200, and a connecting rod mechanism 6 of the hidden upturning supporting device is connected with the locker door 300; wherein, the storage opening 101 is located at the front position of the outer casing 1, the back of the outer casing 1 is provided with a plugging strip 14 along the length direction thereof, and the front edge of the side plate of the cabinet 200 is provided with a plugging slot 201, and the plugging strip 14 is plugged into the plugging slot 201 and fixed by glue, so that the hidden upturning support device 100 and the cabinet 200 are fixed.

The hidden upturning support device with adjustable force and the upturning door locker adopting the hidden upturning support device have the advantages that:

1) The hidden upturning support device is arranged at the front edge of the side plate of the cabinet body, so that the space in the cabinet is not occupied, the width of the cabinet body is not increased, the installation size and the household layout are not affected basically, and the attractive appearance of the cabinet can be maintained.

2) The hidden upturning support device is arranged at the front edge of the side plate of the cabinet body, and the observation hole, the operation hole and the like are positioned at the front position, so that the adjustment operation can be very easy, and the operation effect can be very easy to observe. If the upturning support device is installed in the cabinet, a plurality of inconveniences are brought: for example, the head needs to be stretched into the cabinet for observation and operation, so that the cabinet is inconvenient, the space in the cabinet is narrow and dark, the difficulty is further improved, the risk of smashing the head under the cabinet door is caused by the error adjustment, and the cabinet is very inconvenient; for example, if the spring strength is required to be improved due to long-term use and aging of the spring, the articles in the cabinet need to be taken out first, and after adjustment, the articles are put back into the cabinet, which is very troublesome.

3) The hidden upturning support device is very simple to install and can be adhered by glue.

4) In order to be suitable for being mounted on the front edge of the side plate of the cabinet body and being suitable for the mounting mode of glue cementation, the device needs to be designed to be light enough; however, the problem of insufficient spring moment can be caused, so that the technical effect of increasing the included angle between the supporting arm and the acting force of the spring and further increasing the spring moment is realized by arranging the kidney-shaped hole and the fixed shaft on the first connecting rod and adding the push rod at the top end of the supporting arm; meanwhile, as the waist-shaped hole and the fixed shaft are arranged on the first connecting rod, the weight can be reduced because the waist-shaped hole is of a hollowed-out structure, the size of the push rod is not required to be large, and the push rod can be abutted with the fixed shaft, so that the whole volume and the weight of the hidden upturning supporting device are basically unaffected.

The hidden upturning support device with adjustable force and the upturning door locker adopting the hidden upturning support device provided by the embodiment of the utility model have the following working principle:

1) According to the upturned door locker disclosed by the embodiment of the utility model, when the cabinet door is unfolded in a range of 0-30 degrees, the cabinet door is in a state capable of being automatically buffered and closed, and when the cabinet door is unfolded in a range of 30-90 degrees, the cabinet door is in a state capable of being hovered at will; when the cabinet door is unfolded to 45 degrees, the push rod and the fixing column are abutted, when the cabinet door is gradually unfolded to 90 degrees from 45 degrees, the push rod is gradually moved to the other end from one end in the kidney-shaped hole, and the spring moment is gradually increased in the process.

2) When the cabinet door is opened, the cabinet door is directly pulled upwards to 30-90 degrees; when the cabinet door is closed, the cabinet door is lowered to within 30 degrees, and then the cabinet door can be automatically buffered and closed.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (10)

1. The hidden upturning support device with adjustable force is characterized by comprising an outer shell, an inner shell, an adjusting mechanism, a spring assembly, a supporting arm and a connecting rod mechanism, wherein the adjusting mechanism, the spring assembly, the supporting arm and the connecting rod mechanism are assembled on the inner side of the inner shell;

The outer shell and the inner shell are both in straight strips, the outer shell is used for being installed at the front end edge of the side plate of the cabinet body, and the inner shell is installed inside the outer shell;

the adjusting mechanism comprises an adjusting screw and an operating rod, the positions of the adjusting screw and the operating rod are fixed at the bottom of the inner shell, and the operating rod is in transmission connection with the adjusting screw and is used for driving the adjusting screw to rotate;

The spring assembly comprises a lower sliding seat, a spring and an upper sliding seat, wherein the lower sliding seat and the upper sliding seat form 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, and the lower sliding seat is provided with an adjusting screw hole and forms threaded fit with the adjusting screw rod through the adjusting screw hole;

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

The inner shell and the outer shell are provided with through holes at corresponding positions so as to form a containing opening, and the link mechanism extends to the outside of the outer shell or contracts to the inside of the inner shell through the containing opening.

2. The hidden upturning support device as set forth in claim 1, wherein a push rod is fixed at the top end of the support arm, the first link is provided with a kidney-shaped hole and a fixed shaft at one side of the kidney-shaped hole, and the push rod is slidably or rollably assembled in the kidney-shaped hole;

The fixed shaft is used for supporting the push rod in the stretching process of the connecting rod mechanism, so that the push rod moves from one end of the kidney-shaped hole to the other end of the kidney-shaped hole, and the included angle between the supporting arm and the acting force of the spring is further increased.

3. A hidden upturning support apparatus as set forth in claim 1 wherein the top end of the support arm is hinged to the first link.

4. The hidden upturning support device of claim 1, wherein the support arm comprises two clamping bars, the buffer is arranged between the two clamping bars, a buffer sleeve is arranged on the outer side of the buffer, a piston rod of the buffer is connected with a buffer cushion block, and the buffer cushion block is fixed with the clamping bars.

5. The hidden upturning support device according to claim 1, wherein a height ruler is arranged on the side part of the lower sliding seat, a plurality of marks for representing the relative height of the lower sliding seat are arranged on the height ruler in an up-down linear arrangement mode, an opening for exposing the height ruler is arranged on the side part of the inner shell, and an observation hole for observing the marks is arranged on the side part of the outer shell.

6. The hidden upturning support device according to claim 5, wherein the operating rod is in running fit with 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 meshed with the driven gear part, and the side part of the outer shell is provided with an operating hole corresponding to the outer end of the operating rod.

7. The hidden upturning support device of claim 6, wherein the viewing hole and the operation hole are positioned at a front side of the outer housing, a connection hole is formed at a rear side of the outer housing, a screw hole is formed at a position corresponding to the connection hole of the inner housing, and the connection hole and the screw hole are used for simultaneously inserting screw fasteners, thereby fixing the inner housing and the outer housing.

8. A hidden upturning support device as claimed in any one of claims 1 to 7 wherein the linkage mechanism further comprises a second link, a third link and a fourth link and a connection seat for connection with the cabinet door, wherein two ends of the second link are respectively hinged with the first link and the fourth link, and two ends of the third link are respectively hinged with the first link and the fourth link, so that the first link, the second link, the third link and the fourth link form a planar four-link mechanism, and the connection seat is hinged at the end of the fourth link.

9. An upturning door locker, comprising a locker body, a locker door hinged with the locker body, and a hidden upturning supporting device as claimed in any one of claims 1 to 8, wherein an outer shell is fixedly arranged at the front edge of a side plate of the locker body, and a connecting rod mechanism is connected with the locker door.

10. The up-turned door locker of claim 9, wherein the receiving port is located at a front position of the outer case, a plugging strip is disposed at a back surface of the outer case along a length direction of the outer case, a plugging groove is disposed at a front edge of the side plate of the cabinet body, and the plugging strip is plugged into the plugging groove and fixed by glue, so that the hidden up-turned supporting device is fixed with the cabinet body.