A big data research display device based on GPU and cache management

Abstract

The application discloses a big data research display device based on GPU and cache management, which comprises a base, a host fixedly arranged in the lower surface of the base, and a storage barrel fixedly arranged on the upper surface of the base, and the inside of the storage barrel is provided with a storage mechanism, which can store the display module and prevent contact damage. The big data research display device based on GPU and cache management can prevent external objects from contacting the display screen and prevent the display screen from generating large vibration through the mode that the display screen is received in the storage barrel and protected by the protection cover during transportation, so that the overall transportation of the device is more convenient. Through the integrated arrangement of the display module and the supporting structure of the device, the disassembled parts do not need to be fixed separately during transportation, and the storage arrangement of the supporting structure can reduce the space occupied by the device during transportation and enhance the overall portability.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of big data research display, and particularly relates to a big data research display device based on GPU and cache management. BACKGROUND

[0002] The main difference between a GPU server and a common server lies in hardware configuration and performance, the GPU server is usually equipped with a special graphics processing unit (GPU) for accelerating image processing and rendering tasks, and can provide higher computing performance and processing capacity, the difference is in nature: the database is software that can run on the server, the server is hardware, and the server can become a database server after the database application is installed, the GPU server is a fast, stable and flexible computing service based on GPU and applied to video coding, deep learning, scientific computing and other scenes, the GPU has very excellent graphics processing capability and also has high-performance computing capability, in the same server product, the efficiency of computing and processing is more competitive, and since the GPU is now used not only for graphics but also for various application programs, the size of low-level data cache is increasing, in order to improve general computing capability, the graphics chip needs larger cache, which ensures that no mathematical core is idle and waits for data, the last-level cache has been greatly expanded to offset the fact that the performance of DRAM fails to keep up with the progress of processor performance, a large amount of L2 or L3 cache can reduce cache misses, which can also prevent the kernel from being idle and minimize the need for a very wide memory bus, which is very important for the host device used for big data research, after the big data is researched and made into a data form, the big data needs to be displayed to the exhibitors through a display screen, and after the exhibition is over, the display device needs to be disassembled and transported for the next display and use, however, during the transportation, a large number of parts need to be fixed properly, otherwise, the mutual collision between various parts will cause damage to the equipment, especially for the fragile display module, which cannot bear any impact and severe vibration, and therefore needs extra protection. SUMMARY

[0003] The application aims to provide a big data research display device based on GPU and cache management, so as to solve the problem of inconvenient storage and transportation in the background technology.

[0004] To achieve the above object, the application provides the following technical scheme: a big data research display device based on GPU and cache management, comprising a base, a host is fixedly arranged in the lower surface of the base, and a storage barrel is fixedly arranged on the upper surface of the base, a storage mechanism is arranged in the storage barrel, and the display module is stored and prevented from being damaged by the storage mechanism.

[0005] Preferably, the storage mechanism comprises: a mounting plate fixedly arranged in the interior of the storage barrel, the upper surface of the mounting plate is fixedly provided with a sliding column, the upper end side surface of the sliding column is provided with a sliding limiting plate, the interior of the storage barrel is provided with a center plate, both ends of the center plate are fixedly provided with display screens, and both side outer surfaces of the center plate are provided with guide grooves, one end of a connecting rod is slidably connected in the guide grooves, and the other end of the connecting rod is slidably arranged on the side surface of the sliding column.

[0006] The above technical scheme enables the display screen to be stored in the interior of the storage barrel and protected from damage.

[0007] Preferably, one end of the limiting plate penetrates the inner side surface of the sliding column, the end of the limiting plate towards the center of the storage barrel is designed in a right-angled trapezoidal shape, springs are connected between the limiting plate and the sliding column, and the inclined surface of the one end of the right-angled trapezoidal limiting plate is arranged downward.

[0008] The above technical scheme enables the limiting plate to slide and pass through the connecting rod and support the connecting rod when the limiting plate is pressed.

[0009] Preferably, the guide grooves are designed in an L shape, the inner side surface of one end of the guide grooves is provided with an arc-shaped groove, both ends of the connecting rod are provided in a disc shape, and the surface sliding groove axis section of the sliding column and the axis section of the guide groove are designed in a T shape.

[0010] The above technical scheme enables the connecting rod to be connected with the guide groove and the surface sliding groove of the sliding column.

[0011] Preferably, the upper end of the storage barrel is provided with a protection mechanism, which prevents the display module from being damaged due to vibration.

[0012] The above technical scheme enables the display screen to be prevented from being damaged due to shaking during transportation.

[0013] Preferably, the protection mechanism comprises: a positioning column fixedly arranged in the interior of the upper end of the storage barrel, a horizontal plate arranged in the interior of the base and fixedly mounted with the center plate, a protection cover placed on the upper surface of the storage barrel and provided with a vertical plate fixedly arranged on the lower end surface of the protection cover, a clamping column fixedly arranged on the top surface in the interior of the protection cover and provided with a clamping plate arranged on the inner side surface of the clamping column, a piston column arranged on the lower end surface of the protection cover, a pressure cavity arranged between the interior cavity of the protection cover in which the piston column is arranged and the interior cavity of the clamping column in which the clamping plate is arranged, a pressure relief pipe arranged on the upper end side surface of the pressure cavity, and a plugging bolt arranged on the upper end of the protection cover and provided with a plugging rubber plate arranged on the lower end of the plugging bolt.

[0014] The above technical scheme enables the plugging rubber plate to switch the sealing state of the pressure cavity by plugging the pressure relief pipe.

[0015] Preferably, the lower end surface of the vertical plate is attached to the upper surface of the horizontal plate, the clamping plate and the clamping column are in sliding friction connection, a spring is connected between the clamping plate and the clamping column, the inner surface of the clamping column is attached to the outer surface of the sliding column, the clamping plate and the sliding column are in clamping connection, the piston column and the protective cover are in sliding friction connection, a spring is connected between the piston column and the protective cover, the lower end of the piston column is attached to the upper end surface of the alignment column, the plugging bolt and the protective cover are in threaded connection, the plugging bolt and the plugging rubber plate are in rotating connection, the plugging rubber plate and the protective cover are in sliding connection, and the lower surface of the plugging rubber plate is attached to one end of the pressure relief pipe.

[0016] The above technical solution enables the clamping column to slide and clamp with the sliding column under the support of the compressed air in the pressure cavity when the protective cover is installed.

[0017] Preferably, the lower end side surface of the base is internally provided with a support mechanism for supporting the base and facilitating storage and carrying.

[0018] The above technical solution enables the base to be placed on the ground and moved conveniently.

[0019] Preferably, the support mechanism comprises a storage plate rotatably installed on the lower end inner side surface of the base, a rotatable support plate internally provided on the lower surface of the storage plate, a rotatable displacement wheel internally provided on one end lower surface of the support plate, a rotatable anti-rotation plate provided on one end of the support plate connected with the storage plate, a sliding positioning plate internally provided on one end of the storage plate connected with the base, a plug-in plate fixedly provided on the outer surface of one side of the positioning plate facing the support plate, an unlocking column fixedly provided on the upper surface of the positioning plate, a rotatable unlocking ring provided on the upper surface of the base, a limiting block fixedly provided on the side surface of the unlocking ring, and a sliding pressing block provided on the upper surface of the base.

[0020] The above technical solution enables the pressing block to limit the unlocking ring through clamping with the limiting block.

[0021] Preferably, a spring is connected between the positioning plate and the storage plate, one end of the plug-in plate facing the support plate is designed in a right trapezoidal shape, the inclined surface of one end of the right trapezoidal plug-in plate is downwardly arranged, the plug-in plate and the storage plate are clamped, the upper end of the unlocking column penetrates through the upper surface of the base, the upper surface of the base, the upper surface of the storage plate, and the side surface of the unlocking ring are provided with arc-shaped grooves, the upper end of the unlocking column is clamped with the unlocking ring, the unlocking ring is clamped with the pressing block through the limiting block, and a spring is connected between the pressing block and the base.

[0022] The above technical solution enables the unlocking column to limit the rotation of the storage plate and the support plate.

[0023] Compared with the prior art, the GPU and cache management based big data research display device has the beneficial effects that:

[0024] 1. By means of the display screen being received in the receiving barrel during transportation and being protected by the protective cover, the protective cover can prevent external objects from contacting the display screen and prevent the display screen from generating large vibration, so that the overall transportation of the device is more convenient;

[0025] 2. Further, by means of the display module and the supporting structure being integrally arranged, the disassembled parts do not need to be fixed separately during transportation, and the supporting structure is arranged in a receiving mode, so that the space occupied by the device during transportation is reduced and the overall portability is enhanced;

[0026] 3. Further, by means of the protective cover being mounted on the upper end of the base and being automatically clamped with the sliding column through the clamping plate, the user can directly lift the device as a whole by lifting the protective cover, and the process of transporting the device through additional parts is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole front view structure schematic diagram of the present application;

[0028] Figure 2 It is a whole front view structure schematic diagram of the present application;

[0029] Figure 3 It is a whole front view structure schematic diagram of the present application;

[0030] Figure 4 It is a whole front view structure schematic diagram of the present application;

[0031] Figure 5 It is a whole front view structure schematic diagram of the present application;

[0032] Figure 6 It is a whole front view structure schematic diagram of the present application;

[0033] Figure 7 It is a whole front view structure schematic diagram of the present application; Figure 2 It is an enlarged structure schematic diagram of A in the present application;

[0034] Figure 8 It is an enlarged structure schematic diagram of B in the present application. Figure 2

[0035] ​In the figure: 1, base; 2, main machine; 3, storage barrel; 4, mounting plate; 5, sliding column; 6, limiting plate; 7, center plate; 8, display screen; 9, guide groove; 10, connecting rod; 11, alignment column; 12, cross plate; 13, protective cover; 14, vertical plate; 15, clamping column; 16, clamping plate; 17, piston column; 18, pressure cavity; 19, pressure relief pipe; 20, plugging bolt; 21, plugging rubber plate; 22, storage plate; 23, support plate; 24, displacement wheel; 25, anti-rotation plate; 26, positioning plate; 27, plug-in plate; 28, unlocking column; 29, unlocking ring; 30, limiting block; 31, pressing block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] Please refer to Figures 1-8 The present application provides a technical solution: a big data research display device based on GPU and cache management.

[0038] Embodiment one

[0039] In this embodiment, the base 1 is fixedly provided with the main machine 2 inside the lower surface of the base 1, and the storage barrel 3 is fixedly arranged on the upper surface of the base 1, the inside of the storage barrel 3 is provided with a storage mechanism, and the display module is stored and prevented from being damaged by contact through the storage mechanism;

[0040] The storage mechanism comprises: a mounting plate 4 fixedly arranged in the inside of the storage barrel 3, a sliding column 5 fixedly arranged on the upper surface of the mounting plate 4, a limiting plate 6 slidably mounted on the upper end side surface of the sliding column 5, a center plate 7 provided in the inside of the storage barrel 3, display screens 8 fixedly mounted at both ends of the center plate 7, and guide grooves 9 opened on the outer surfaces of both sides of the center plate 7, one end of a connecting rod 10 slidably connected in the inside of the guide groove 9, and the other end of the connecting rod 10 slidably mounted on the side surface of the sliding column 5;

[0041] One end of the limiting plate 6 penetrates the inside surface of the sliding column 5, one end of the limiting plate 6 towards the center of the storage barrel 3 is designed as a right-angled trapezoid, a spring is connected between the limiting plate 6 and the sliding column 5, and the inclined surface of one end of the right-angled trapezoid of the limiting plate 6 is arranged downward;

[0042] The guide groove 9 is designed as an L shape, an arc-shaped groove is arranged on the inside surface of one end of the guide groove 9, both ends of the connecting rod 10 are arranged as disc shapes, and the surface groove shaft section of the sliding column 5 and the shaft section of the guide groove 9 are both designed as T shapes.

[0043] When it is needed to be unfolded, first pull up the center plate 7, at this time the center plate 7 slides out of the storage barrel 3 through the connecting rod 10 relative to the sliding column 5 on the upper surface of the mounting plate 4, until one end of the connecting rod 10 presses one end of the inclined surface of the limiting plate 6, at this time the inclined surface of the limiting plate 6 is pressed to slide and stretch the spring between the sliding column 5, until the limiting plate 6 completely lets the connecting rod 10 pass and slides through the right-angle edge to support the connecting rod 10 under the support of the spring, at this time rotate the center plate 7 to make the display screens 8 on both sides rotate to the vertical state, then slide the center plate 7 horizontally to make the connecting rod 10 slide to the arc-shaped groove of the guide groove 9, at this time the lower end of the display screens 8 on both sides is attached to the upper surface of the base 1 to realize stable placement and facilitate the display of the data chart output by the host 2.

[0044] Embodiment two

[0045] This embodiment discloses that the upper end of the storage barrel 3 is provided with a protection mechanism, which prevents the display module from being damaged by vibration;

[0046] The protection mechanism comprises: a positioning column 11, the positioning column 11 is fixedly arranged in the upper end of the storage barrel 3, the inside of the base 1 is provided with a horizontal plate 12, and the horizontal plate 12 is fixedly installed with the center plate 7, the upper surface of the storage barrel 3 is placed with a protective cover 13, and the lower end surface of the protective cover 13 is fixedly provided with a vertical plate 14, the inside top surface of the protective cover 13 is fixedly provided with a clamping column 15, and the inside surface of the clamping column 15 is installed with a clamping plate 16, the lower end surface of the protective cover 13 is installed with a piston column 17, a pressure cavity 18 is arranged between the inside cavity of the protective cover 13 where the piston column 17 is located and the inside cavity of the clamping column 15 where the clamping plate 16 is located, a pressure relief pipe 19 is arranged on the upper end side surface of the pressure cavity 18, the upper end of the protective cover 13 is installed with a plugging bolt 20, and the lower end of the plugging bolt 20 is provided with a plugging rubber plate 21.

[0047] The lower end surface of the vertical plate 14 is attached to the upper surface of the horizontal plate 12, the clamping plate 16 and the clamping column 15 are in sliding friction connection, springs are connected between the clamping plate 16 and the clamping column 15, the inside surface of the clamping column 15 is attached to the outside surface of the sliding column 5, the clamping plate 16 is clamped and connected with the sliding column 5, the piston column 17 and the protective cover 13 are in sliding friction connection, springs are connected between the piston column 17 and the protective cover 13, the lower end of the piston column 17 is attached to the upper end surface of the positioning column 11, the plugging bolt 20 and the protective cover 13 are in threaded connection, the plugging bolt 20 and the plugging rubber plate 21 are in rotary connection, the plugging rubber plate 21 and the protective cover 13 are in sliding connection, and the lower surface of the plugging rubber plate 21 is attached to one end of the pressure relief pipe 19.

[0048] When the display is completed and needs to be stored and carried, the protective cover 13 is inserted into the alignment column 11 through the piston column 17, so that the protective cover 13 is accurately placed on the upper surface of the base 1, and the protective cover 13 is pressed against the horizontal plate 12 through the lower end of the vertical plate 14. At this time, the connection rod 10 is matched with the clamping of the guide groove 9, so that the center plate 7 cannot move horizontally and longitudinally at this time to reduce the vibration in the transportation process. At the same time, the piston column 17 is extruded and slides upward during the insertion process. At this time, the pressure cavity 18 transmits pressure to the clamping plate 16, so that the clamping plate 16 extends to clamp the sliding column 5 with the clamping column 15, so that the protective cover 13 cannot be separated from the base 1 to facilitate the lifting of the base 1 as a whole. When the protective cover 13 needs to be disassembled, the blocking bolt 20 is rotated to make the blocking rubber plate 21 move upward to unblock the pressure relief pipe 19, so that the pressure relief pipe 19 can release the pressure in the pressure cavity 18 to make the clamping plate 16 retract under the pull of the spring to separate from the clamping of the sliding column 5.

[0049] Embodiment three

[0050] This embodiment discloses that the lower end of the base 1 is internally provided with a supporting mechanism for supporting the base 1 and facilitating storage and carrying on the basis of embodiments 1 and 2;

[0051] The supporting mechanism comprises a storage plate 22 rotatably installed on the inner side surface of the lower end of the base 1, and a rotating support plate 23 is internally installed on the lower surface of the storage plate 22. One end of the support plate 23 is internally provided with a rotating displacement wheel 24, and one end of the support plate 23 connected with the storage plate 22 is internally provided with a rotating anti-rotation plate 25. One end of the storage plate 22 connected with the base 1 is internally provided with a sliding positioning plate 26, and an insertion plate 27 is fixedly arranged on the outer surface of one side of the positioning plate 26 facing the support plate 23. An unlocking column 28 is fixedly arranged on the upper surface of the positioning plate 26. An unlocking ring 29 is rotatably installed on the upper surface of the base 1, and a limiting block 30 is fixedly arranged on the side surface of the unlocking ring 29. A pressing block 31 is slidably installed on the upper surface of the base 1.

[0052] A spring is connected between the positioning plate 26 and the storage plate 22. One end of the insertion plate 27 facing the support plate 23 is designed as a right-angled trapezoid, and the inclined surface of one end of the right-angled trapezoid of the insertion plate 27 is downwardly arranged. The insertion plate 27 is clampedly installed with the storage plate 22. The upper end of the unlocking column 28 penetrates through the upper surface of the base 1, and the upper surface of the base 1, the upper surface of the storage plate 22 and the side surface of the unlocking ring 29 are provided with arc-shaped grooves. The upper end of the unlocking column 28 is clampedly installed with the unlocking ring 29. The unlocking ring 29 is clampedly installed with the pressing block 31 through the limiting block 30, and a spring is connected between the pressing block 31 and the base 1.

[0053] When the support needs to be unfolded, slide the pressing block 31 downward to make it disengage from the limiting block 30, then rotate the unlocking ring 29 to make it drive the arc-shaped slot to rotate and release the limiting of the unlocking column 28, at this time, rotate the storage plate 22 to make it rotate out of the side surface of the base 1, then lift the base 1 as a whole and pull the unlocking column 28, at this time, the unlocking column 28 drives the plug-in plate 27 to slide and disengage from the support plate 23 through the positioning plate 26, so that the support plate 23 can be flipped downward and perpendicular to the ground, at this time, rotate the anti-rotation plate 25 to make it rotate out of the lower surface of the support plate 23 and the base 1, so that the support plate 23 can stably contact with the ground through the displacement wheel 24 when it is stressed to support the base 1 without flipping, when storing, the anti-support plate 23 is flipped upward to press the inclined surface of the plug-in plate 27, so that the plug-in plate 27 can drive the positioning plate 26 to slide and pass through the anti-support plate 23, and restore the engagement with the anti-support plate 23 under the support of the spring after the anti-support plate 23 is completely stored.

[0054] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A big data research and display device based on GPU and cache management, comprising a base (1), a host (2) fixedly arranged inside the lower surface of the base (1), and a storage bucket (3) fixedly arranged on the upper surface of the base (1), characterized in that: The storage barrel (3) is provided with a storage mechanism inside, which stores the display module and prevents contact damage. The storage mechanism comprises: a mounting plate (4), the mounting plate (4) being fixedly arranged inside the storage barrel (3), a sliding column (5) being fixedly arranged on the upper surface of the mounting plate (4), a sliding limit plate (6) being installed on the upper side surface of the sliding column (5), a center plate (7) being arranged inside the storage barrel (3), and display screens (8) being fixedly installed at both ends of the center plate (7), and guide grooves (9) being provided on the outer surfaces of both sides of the center plate (7), one end of a connecting rod (10) being slidably connected inside the guide groove (9), and the other end of the connecting rod (10) being slidably installed on the side surface of the sliding column (5); A support mechanism is installed inside the lower side surface of the base (1) for supporting the base (1) and facilitating storage and carrying. The support mechanism comprises: a storage plate (22), the storage plate (22) is rotatably installed on the inner side surface of the lower end of the base (1), and a rotating support plate (23) is installed inside the lower surface of the storage plate (22), and a rotating displacement wheel (24) is installed on the lower surface of one end of the support plate (23), and a rotating anti-rotation plate (24) is installed on the end of the support plate (23) connected to the storage plate (22). 5), a sliding positioning plate (26) is installed inside one end of the receiving plate (22) connected to the base (1), and a plug-in plate (27) is fixedly provided on the outer surface of the positioning plate (26) facing the support plate (23), and an unlocking column (28) is fixedly provided on the upper surface of the positioning plate (26), a rotating unlocking ring (29) is installed on the upper surface of the base (1), and a limit block (30) is fixedly provided on the side surface of the unlocking ring (29), and a sliding pressing block (31) is installed on the upper surface of the base (1).

2. The big data research and display device based on GPU and cache management according to claim 1, characterized in that: One end of the limiting plate (6) passes through the inner surface of the sliding column (5), and the end of the limiting plate (6) facing the center of the storage barrel (3) is designed as a right-angled trapezoid, and a spring is connected between the limiting plate (6) and the sliding column (5), and the inclined surface of one end of the right-angled trapezoid of the limiting plate (6) is set downward.

3. The big data research and display device based on GPU and cache management according to claim 1, characterized in that: The guide groove (9) is L-shaped, and an arc-shaped groove is provided on the inner surface of one end of the guide groove (9). Both ends of the connecting rod (10) are disc-shaped. The axial cross-section of the sliding groove on the surface of the sliding column (5) and the axial cross-section of the guide groove (9) are both T-shaped.

4. The big data research and display device based on GPU and cache management according to claim 1, characterized in that: A protective mechanism is provided at the upper end of the storage barrel (3), which prevents the display module from being damaged by vibration.

5. The big data research and display device based on GPU and cache management according to claim 4, characterized in that: The protection mechanism comprises: an alignment column (11), the alignment column (11) is fixedly arranged inside the upper end of the storage barrel (3), a horizontal plate (12) is arranged inside the base (1), and the horizontal plate (12) is fixedly installed with the center plate (7), a protective cover (13) is placed on the upper surface of the storage barrel (3), and a vertical plate (14) is fixedly arranged on the lower end surface of the protective cover (13), and a locking column (15) is fixedly arranged on the inner top surface of the protective cover (13), and the locking column (15) is fixedly arranged. A clamping plate (16) is installed on the inner surface, a piston column (17) is installed on the lower end surface of the protective cover (13), a pressure chamber (18) is provided between the internal cavity of the protective cover (13) where the piston column (17) is located and the internal cavity of the engaging column (15) where the clamping plate (16) is located, a pressure relief pipe (19) is provided on the upper end side surface of the pressure chamber (18), a blocking bolt (20) is installed on the upper end of the protective cover (13), and a blocking rubber plate (21) is provided on the lower end of the blocking bolt (20).

6. The big data research and display device based on GPU and cache management according to claim 5, characterized in that: The lower end surface of the vertical plate (14) is in contact with the upper surface of the horizontal plate (12), the clamping plate (16) is in sliding friction connection with the clamping column (15), and a spring is connected between the clamping plate (16) and the clamping column (15), and the inner surface of the clamping column (15) is in contact with the outer surface of the sliding column (5), the clamping plate (16) is in contact with the sliding column (5), the piston column (17) is in sliding friction connection with the protective cover (13), and A spring is connected between the piston column (17) and the protective cover (13), and the lower end of the piston column (17) is in contact with the upper end surface of the alignment column (11). The blocking bolt (20) is threadedly connected to the protective cover (13), and the blocking bolt (20) is rotationally connected to the blocking rubber plate (21). The blocking rubber plate (21) is slidingly connected to the protective cover (13), and the lower surface of the blocking rubber plate (21) is in contact with one end of the pressure relief pipe (19).

7. The big data research and display device based on GPU and cache management according to claim 1, characterized in that: A spring is connected between the positioning plate (26) and the receiving plate (22), one end of the plug-in plate (27) facing the support plate (23) is designed as a right-angled trapezoid, and the inclined surface of one end of the right-angled trapezoid of the plug-in plate (27) is set downward, and the plug-in plate (27) and the receiving plate (22) are snap-fitted and installed, the upper end of the unlocking column (28) passes through the upper surface of the base (1), and the upper surface of the base (1), the upper surface of the receiving plate (22) and the side surface of the unlocking ring (29) are provided with an arc-shaped slot, the upper end of the unlocking column (28) is snap-fitted and installed with the unlocking ring (29), the unlocking ring (29) is snap-fitted and installed with the pressing block (31) through the limiting block (30), and a spring is connected between the pressing block (31) and the base (1).

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