CN111419016A - Rotary book room - Google Patents

Abstract

A rotating bookstore comprises a base, an electric control turntable, a bookshelf assembly and a light-transmitting cover, an electric control turntable is installed on the base, and a bookshelf assembly is installed on the electric control turntable; The outer periphery is provided with a space between the bookshelf assembly and the electric control turntable. The electronically controlled turntable is used to provide rotational power to the bookshelf assembly so that it can rotate 360 degrees to display the books in the bookstore. The spacing ensures that the bookshelf assembly does not touch the transparent cover as it rotates. The bookshelf assembly includes a multi-layer bookshelf tray, and the two layers of the bookshelf trays are fixedly connected by connecting short columns; the bookshelf is arranged on the bookshelf tray. The present invention is cylindrical, compact in structure and elegant in appearance, and is suitable for being placed in a family room or an office. More books can be placed, saving space. The bookshelf assembly has a swivel function, so that people who read books do not need to walk back and forth in front of the bookshelf, and can check all the books on the bookshelf in all directions at a certain position beside the bookshelf.

Description

revolving bookstore

technical field

The invention relates to a novel bookcase, in particular to a cylindrical three-dimensional bookcase that can be rotated 360 degrees electrically or manually, in particular to a rotating bookstore.

Background technique

Bookcases or bookshelves have a long history, and there were bookcases long before the Spring and Autumn Period and the Warring States Period. In ancient times, there was no papermaking technique, and culture and knowledge were engraved on bamboo slips, which were expensive and time-consuming. Only large families had bamboo slips. In order to better preserve bamboo slips, the ancients invented bookshelves and bookcases (similar to bookshelves with doors) to store books. At present, most of the bookcases we see in our lives are long strips, which are suitable for fixed placement on walls or corners.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a revolving bookstore that can be placed at any position indoors to facilitate viewing of books at any position in the bookstore.

In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: a rotating bookstore, characterized in that it includes a base, an electric-controlled turntable, a bookshelf assembly and a light-transmitting cover, the electric-controlled turntable is installed on the base, and the bookshelf assembly is installed on the electric-controlled turntable. The outer cover is placed on the outer edge of the upper surface of the base and is located on the periphery of the bookshelf assembly and the electronically controlled turntable, and is spaced from the bookshelf assembly and the electronically controlled turntable.

Motors, power supplies, conductive slip rings, and control boards are installed in the base; these facilities are used to provide functions such as rotational power, lighting, and automatic or manual programmed operation.

The electronically controlled turntable includes a lower bracket, an upper gland, a gear ring, a lower gland, a steel ball cage and a rotating tray; the lower and upper ends of the ring gear are correspondingly installed with lower and upper glands, and the lower and upper The covers are all provided with grooves, and a steel ball cage is placed in the groove, and dozens of steel balls are embedded in the steel ball cage. The bookshelf assembly is fixedly connected; the output end of the motor is provided with a pinion, and the pinion meshes with the ring gear. The motor drives the ring gear to rotate through the pinion, thereby driving the rotating tray to rotate, and then driving the bookshelf assembly to rotate as a whole.

The bookshelf assembly includes a multi-layer bookshelf tray, and the two layers of the bookshelf trays are fixedly connected by connecting short columns; the bookshelf is arranged on the bookshelf tray. The bottom surface of the bookshelf tray is provided with lighting lamps, which are used to illuminate the books on the lower layer.

The light-transmitting cover includes a middle circle, a column and a top cover. The middle circle divides the light-transmitting cover into upper and lower layers. The upper and lower ends of the middle circle are fixedly connected to several columns. The upper end of the column on the upper end of the middle circle is fixedly connected to the top cover. The lower end of the column on the lower end face is fixedly connected to the base, and fixed glass or sliding glass is installed between two adjacent columns at the same horizontal position; the sliding glass is used as a sliding door.

The light-transmitting cover completely encloses the bookshelf assembly, which can ensure that the books are clean and hygienic without dust, and the sliding glass as a sliding door can be opened to pick up and place books.

The present invention is a fully enclosed 360-degree rotatable modern integral bookcase that combines mechanical and electrical functions. The present invention has a cylindrical structure, compact structure, beautiful appearance, and is suitable for being placed in a family room or an office. Books are placed 360 degrees on the shelf tray, which can store more books and save space. The bookshelf assembly has a swivel function, and people who read books do not need to walk back and forth in front of the bookshelf, and can check all the books on the bookshelf in all directions at a certain position beside the bookshelf.

The light-transmitting cover is made of a transparent material, which does not block sight. The present invention is equipped with a lighting lamp above each layer of the bookshelf, and an optional atmosphere lamp placed on the edge of each layer of the bookshelf to improve the rendering effect of the bookstore. The invention has a cylindrical shape, and can be used as a bookcase for storing and storing books, and can also be used as a piece of exquisite indoor furniture. Ambient lights of various colors and intensities can be personalized to create different reading environments.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the present invention,

Figure 2 is a perspective view of the present invention,

Fig. 3 is the top view structure schematic diagram of the base,

Fig. 4 is the three-dimensional structure schematic diagram of the base,

Fig. 5 is the sectional structure schematic diagram of the electric control turntable,

Figure 6 is a schematic diagram of the structural relationship between the electronically controlled turntable and the motor,

Fig. 7 is the three-dimensional structure schematic diagram of the bookshelf assembly,

Figure 8 is a schematic structural diagram of a bookshelf tray,

Fig. 9 is the three-dimensional structure schematic diagram of the bookshelf,

Figure 10 is a schematic diagram of the structure of the connecting short column,

Figure 11 is a schematic view of the structure of the fixed frame of the light-transmitting cover,

Fig. 12 is an enlarged view of part A in Fig. 1,

Figure 13 is a schematic diagram of the structure of the column,

Figure 14 is a schematic three-dimensional structure of the middle ring,

Figure 15 is a schematic view of the structure of the fixed glass,

Figure 16 is a schematic diagram of the structure of the sliding glass,

Figure 17 is a schematic sectional view of the lower shelf tray,

FIG. 18 is a circuit diagram.

In the figure: 1—base, 101—motor, 102—motor fixing plate, 103—pinion, 104—power supply, 105—conductive slip ring, 106—motor speed control switch, 107—control board, 108—column socket, 109—fixed glass groove, 110—sliding glass groove, 111—power socket, 112—supporting ribs; 2—electrically controlled turntable, 201—rotating tray, 202—lower cover, 203—gear ring, 204—steel ball cage, 205—steel ball, 206—lower bracket, 207—lower bracket bayonet; 208—upper gland, 209—positioning post; 3—bookshelf assembly, 301—connecting short post, 302—bookshelf tray, 303—frame bookshelf , 304 - short post riveting, 305 - wire tube, 306 - connecting jack, 307 - lighting lamp, 308 - atmosphere lamp; 309 - stability ring; 310 - wire perforation; 311 - bookshelf installation jack; 312 - bookshelf insert ;313—lamp slot; 314—lower connection jack; 4—translucent cover, 401—top cover, 402—fixed glass, 403—upright column, 404—middle ring, 405—sliding glass, 406—top cover jack, 407—Sliding glass groove on the upper end of the middle ring, 408—Sliding glass groove on the lower end of the middle ring, 409—Fixed glass groove on the upper end of the middle ring, 410—Fixed glass groove on the lower end of the middle ring, 411—Fixed glass groove on the top cover, 412— Top cover sliding glass groove, 413—column riveting, 414—center ring socket, W1—interval, W2—second interval.

Detailed ways

As shown in Figures 1 and 2: a rotating bookstore, characterized in that it comprises a base 1, an electronically controlled turntable 2, a bookshelf assembly 3 and a light-transmitting cover 4; The bookshelf assembly 3 is installed, and the light-transmitting cover 4 is placed on the outer edge of the base 1 and on the periphery of the bookshelf assembly 3 and the electronically controlled turntable 2 , and a space W1 is set between the electronically controlled turntable 2 and the bookshelf assembly 3 .

The electronically controlled turntable 2 installed on the base 1 is used to provide rotational power to the bookshelf assembly 3 to make it rotate 360 degrees to display the books in the bookstore. The interval W1 ensures that the bookshelf assembly 3 does not touch the transparent cover 4 when rotating.

Referring to Figures 3 and 4: the base 1 is a box structure. The base 1 is equipped with a motor 101, a power supply 104, a conductive slip ring 105, and a motor speed control switch 106. The side wall of the base 1 is fixed with a control board 107 and a motor fixing plate 102. , the power socket 111; the motor 101 is fixed on the motor fixing plate 102; see Figure 18; Connected to the motor 101, the motor 101 is used to drive the electric control turntable 2 to rotate; the control board 107 is also connected to the conductive slip ring 105, and the conductive slip ring 105 is also connected to the lighting lamp 307 and the atmosphere lamp 308.

The inner wall of the base 1 is provided with a plurality of support ribs 112 for supporting the electronically controlled turntable 2; in this embodiment, there are 23 support ribs 112, and the number of the support ribs 112 is not limited. The upper end surface of the side wall of the base 1 is provided with four column insertion holes 108 , and similarly, the number of the column insertion holes 108 is not limited.

As shown in FIG. 5 and FIG. 6 : the electronically controlled turntable 2 includes a lower bracket 206 , an upper pressure cover 208 , a gear ring 203 , a lower pressure cover 202 , a steel ball holder 204 and a rotating tray 201 ; the lower end face of the ring gear 203 , the upper The end faces are correspondingly installed with the lower gland 202 and the upper gland 208. The lower gland 202, the upper gland 208 and the upper and lower parts of the gear ring 203 are provided with grooves. The steel ball cage 204 is placed in the groove, and the steel ball cage 204 is embedded. There are dozens of steel balls 205, the upper end surface of the lower bracket 206 is installed with the lower pressing cover 202, the upper end surface of the upper pressing cover 208 is installed with the rotating tray 201, and the rotating tray 201 is fixedly connected with the bookshelf assembly 3; see Figure 3 and Figure 4; motor The output end of 101 is provided with a pinion gear 103 , and the pinion gear 103 meshes with the ring gear 203 . The motor 101 drives the ring gear 203 to rotate through the pinion gear 103, thereby driving the rotating tray 201 to rotate, thereby driving the bookshelf assembly 3 to rotate as a whole. Referring to FIG. 6 ; the lower bracket 206 is provided with lower bracket bayonet 207 corresponding to the number of supporting ribs 112 , and the supporting rib 112 is clamped in the lower bracket bayonet 207 to fix and support the lower part of the electric control turntable 2 .

The assembly steps of the electric control turntable 2 are roughly as follows: first install the lower cover 202 on the upper surface of the lower bracket 206, place the steel ball cage 204 in the lower cover 202, and insert the steel ball 205 into the hole of the steel ball cage 204 in advance. The ring gear 203 is placed on it, a layer of steel ball cage 204 is installed on the ring gear 203 , an upper cover 208 is installed on the steel ball 205 , and finally a tray 201 is installed on the upper cover 208 .

The transmission relationship can be seen from FIG. 6 : when the motor 101 is energized and rotated, the pinion 103 on the shaft of the motor 101 drives the ring gear 203 of the electronically controlled turntable 2 to rotate, thereby driving the tray 201 to rotate, thereby driving the bookshelf assembly 3 to rotate as a whole. It can be seen from Figure 5 that two layers of steel balls are installed on the top and bottom of the ring gear 203. When the motor rotates, the steel balls on the lower layer are rotating; if there is an external force acting on the bookshelf assembly 3 to prevent the rotation, the upper layer is rotating. The steel ball starts to rotate, and the bookshelf assembly 3 is in a stationary state, thus ensuring the safety of the user.

As shown in FIG. 7 : the bookshelf assembly 3 includes multiple layers of bookshelf trays 302 , and a frame-type bookshelf 303 is installed on each layer of the bookshelf trays 302 ; in this embodiment, the bookshelf trays 302 are four layers, and the two layers of the bookshelf trays 302 are connected by short posts 301 Fixed connection, the top bookshelf tray 302 is connected to the upper end of the short column 301 is fixedly connected to a stability ring 309, the diameter of the stability ring 309 is slightly larger than the diameter of the bookshelf tray 302; a second interval W2 is set between the stability ring 309 and the transparent cover 4, and the first The interval W2 is smaller than the interval W1. The second interval W2 ensures that when the bookshelf assembly 3 rotates normally, there will be no friction. When an external force pushes the bookshelf assembly 3 laterally, the side of the stabilization ring 309 will be blocked by the inner surface of the light-transmitting cover top cover 401, thus preventing the bookshelf Assembly 3 rocks further sideways.

1; a ring lighting lamp 307 is arranged under the bookshelf tray 302 to illuminate the lower bookshelf, and an ambient light 308 is installed on the outside of the bookshelf tray 302; see FIG. 7 and FIG. 8; The ambient light 308 is an LED flexible light bar, which is convenient to be installed in the light trough; the bookshelf tray 302 is provided with a wire through hole 310, and a wire tube 305 is installed in the wire through hole 310. ; The periphery of the bookshelf tray 302 is evenly distributed with connecting holes 306; in this embodiment, there are four; The jacks 306 are inserted, and the upper and lower bookshelf trays 302 are fixedly connected. By analogy, the bookshelf tray 302 is installed from bottom to top. After the installation of the bookshelf tray 302 on the top layer is completed, the stabilization ring 309 is installed by the same method.

9; the lower end of the frame-type bookshelf 303 is provided with a bookshelf insert 312, the bookshelf tray 302 is provided with a bookshelf mounting hole 311, and the bookshelf insert 312 is inserted into the bookshelf mounting hole 311 to fix the frame-type bookshelf 303 on the bookshelf tray 302 .

See Figure 17; the bottom edge of the bookshelf tray 302 is provided with a hole 314, see Figure 5; the upper end of the tray 201 is provided with a positioning column 209, the positioning column 209 is inserted into the hole 314, and the bookshelf assembly 3 is integrally fixed to the rotating tray 201.

As shown in FIG. 11 : the light-transmitting cover 4 includes a middle ring 404, a column 403 and a top cover 401. The middle ring 404 divides the light-transmitting cover 4 into upper and lower layers, and the upper and lower end surfaces of the middle ring 404 are fixedly connected to four columns 403. The number of the uprights 403 is not limited by this embodiment, and can be 3-6 according to the diameter; the upper end of the uprights 403 installed on the upper end of the middle ring is fixedly connected to the top cover 401, and the lower end of the uprights 403 installed on the lower end of the middle ring is fixed Connected to the base 1, a fixed glass 402 or a sliding glass 405 is installed between two adjacent columns 403 at the same horizontal position; see Figure 15 and Figure 16, the fixed glass 402 and the sliding glass 405 are arc-shaped, and the sliding glass is used as a sliding door, With handle. Referring to FIG. 12, the upper end surface of the middle ring 404 is provided with an upper end surface sliding glass groove 407 and an upper end surface fixed glass groove 409, and the lower end surface of the middle ring 404 is provided with a lower end surface sliding glass groove 408 and a lower end surface fixed glass groove 410; refer to FIG. 1, The lower end surface of the top cover 401 is provided with a top cover fixing glass groove 411 and a top cover sliding glass groove 412 ; referring to FIG. 13 , the upper and lower ends of the upright post 403 are provided with upright post rivets 413 . The upper and lower end surfaces of the middle ring 404 are evenly distributed with four middle ring insertion holes 414 along the circumference. The number of the middle ring insertion holes 414 is not limited by this embodiment. The lower end surface of the top cover 401 is provided with a top cover insertion hole 406 . 3 and 4; the upper edge of the base 1 has four sockets 108 evenly distributed along the circumference, and the column rivets 413 of the upper column 403 are inserted into the top cover socket 406 and the middle ring socket 414 on the upper end face of the middle ring 404. , the top cover 401 and the middle ring 404 are fixed and riveted; the column riveting 413 of the lower column 403 is inserted into the jack 108 and the middle ring hole 414 on the lower end of the middle ring 404, and the base 1 and the middle ring 404 are fixed and riveted. There are two glass installation grooves in the radial direction between the jacks 108, namely the fixed glass groove 109 and the sliding glass groove 110; the fixed glass 402 is installed between the upper fixed glass groove 409 and the top cover fixed glass groove 411, and the lower end is fixed A fixed glass 402 is installed between the glass groove 410 and the fixed glass groove 109 ; a sliding glass 405 is installed between the sliding glass groove 407 on the upper end surface and the sliding glass groove 412 on the top cover, and a sliding glass groove 408 is installed between the sliding glass groove 408 on the lower end surface and the sliding glass groove 110 Glass 405. Three pieces of fixed glass 402 are continuously installed on the adjacent uprights 403; sliding glass 405 is installed between the remaining two uprights.

The working process of the present invention is roughly as follows: after the power socket 111 is connected to the external power supply, the power supply 104 in the base 1 supplies power to the control board 107, and the control board 107 supplies power to the motor speed control switch 106 after controlling the output, and then the motor speed control The switch 106 supplies power to the motor 101. When the motor 101 is powered on and rotates, the pinion 103 drives the ring gear 203 to rotate, thereby driving the tray 201 to rotate, and then drives the bookshelf assembly 3 to rotate as a whole to achieve a 360-degree rotating display, and the lighting lamp 307 illuminates the bookstore; The lights 308 play a rendering effect and increase the viewing experience.

The present invention is cylindrical, the bookshelf tray 302 can be made into a series of products with a diameter of 0.4m to 1.5m, and the number of layers of the bookshelf tray 302 can be adjusted between 2 to 5 layers, generally designed to be 4 layers, and the height of each layer is 35cm ~ 50cm; users can choose according to their own situation. Since the bookshelf assembly 3 and the light-transmitting cover 4 of the present invention are fixedly connected by a multi-layer combined riveting structure, the storage and transportation occupy a small space, and the user can assemble them after purchasing.

The frame of the present invention can be welded and pressed with different metal materials, such as stainless steel, aluminum, etc.; it can also be assembled with high-strength plastic injection molding, such as high-strength polypropylene, ABS, PMMA, etc., or tempered glass or Other new materials are directly cast. At the same time, the material of the bookshelf is made of metal plates or profiles, high-strength organic materials or various wood materials. There are no restrictions on its structure, shape and size. Various structures and sizes can be used to create a beautiful shape. , which is convenient for placing books and matching with bookshelf trays.

The fixed glass 402 and the sliding glass 405 can be made of light-transmitting materials such as acrylic plate, plexiglass, and tempered glass. The planting tray connecting short column 301 can also be made of light-transmitting materials such as acrylic plate, plexiglass, tempered glass, etc., which further enhances the light-transmitting effect.

Claims (10)

1. A rotatory book room which characterized in that: comprises a base (1), an electric control turntable (2), a bookshelf component (3) and a light-transmitting outer cover (4); an electric control turntable (2) is arranged on the base (1), a bookshelf component (3) is arranged on the electric control turntable (2), a light-transmitting outer cover (4) is arranged on the outer edge of the base (1) and is positioned on the peripheries of the bookshelf component (3) and the electric control turntable (2), and a space (W1) is arranged between the light-transmitting outer cover and the bookshelf component (3) and between the light-transmitting outer cover and the electric control turntable (2).

2. The rotary bookstore of claim 1, further comprising: the base (1) is of a box structure, a motor (101), a power supply (104), a conductive slip ring (105) and a motor speed regulation switch (106) are installed in the base (1), and a control panel (107), a motor fixing plate (102) and a power socket (111) are fixed on the side wall of the base (1); the motor (101) is fixed on the motor fixing plate (102); the power socket (111) is connected with the power supply (104), the power supply (104) is connected with the control panel (107), the control panel (107) is connected with the motor speed regulation switch (106), and the motor speed regulation switch (106) is connected with the motor (101); the control board (107) is also connected with the conductive slip ring (105); the inner wall of the base (1) is provided with a plurality of supporting ribs (112).

3. The rotary bookstore of claim 2, further comprising: the electric control turntable (2) comprises a lower bracket (206), an upper gland (208), a gear ring (203), a lower gland (202), a steel ball retainer (204) and a tray (201); a lower gland (202) and an upper gland (208) are correspondingly arranged on the lower end face and the upper end face of the gear ring (203), grooves are respectively formed in the upper surfaces and the lower surfaces of the lower gland (202), the upper gland (208) and the gear ring (203), a steel ball retainer (204) is placed in each groove, dozens of steel balls (205) are embedded in the steel ball retainer (204), the lower gland (202) is arranged on the upper end face of a lower bracket (206), a tray (201) is arranged on the upper end face of the upper gland (208), and the tray (201) is fixedly connected with the bookshelf component (3); the output end of the motor (101) is provided with a pinion (103), and the pinion (103) is meshed with the gear ring (203); the lower bracket (206) is provided with lower bracket bayonets (207) corresponding to the number matching positions of the support ribs (112), and the support ribs (112) are clamped on the lower bracket bayonets (207) to support the electric control turntable (2).

4. The rotary bookstore of claim 3, further comprising: the bookshelf component (3) comprises a plurality of layers of bookshelf trays (302), and a frame type bookshelf (303) is arranged on each layer of bookshelf tray (302); the two layers of bookshelf trays (302) are fixedly connected through a connecting short column (301), the upper end of the connecting short column (301) of the bookshelf tray (302) at the top layer is fixedly connected with a stabilizing ring (309), and the diameter of the stabilizing ring (309) is slightly larger than that of the bookshelf tray (302); a second interval (W2) is arranged between the stabilizing ring (309) and the transparent outer cover (4), and the second interval (W2) is smaller than the interval (W1).

5. The rotary bookstore of claim 4, further comprising: a plurality of connecting jacks (306) are uniformly distributed on the periphery of the bookshelf tray (302); short post rivets (304) are arranged at the upper end and the lower end of the connecting short post (301), the short post rivets (304) are spliced with the connecting insertion holes (306), and the upper layer bookshelf tray (302) and the lower layer bookshelf tray (302) are fixedly connected.

6. The rotary bookstore of claim 5, further comprising: an annular illuminating lamp (307) is arranged below the bookshelf tray (302), and an atmosphere lamp (308) is arranged in a groove at the upper edge of the bookshelf tray (302); the bookshelf tray (302) is provided with a wire through hole (310), a wire pipe (305) is installed on the wire through hole (310), and a wire installed on the wire pipe (305) connects the conductive slip ring (105) with the illuminating lamp (307) and the atmosphere lamp (308).

7. The rotary bookstore of claim 6, further comprising: the lower end of the frame-type bookshelf (303) is provided with a bookshelf inserting piece (312), the bookshelf tray (302) is provided with a bookshelf mounting insertion hole (311), and the bookshelf inserting piece (312) is inserted into the bookshelf mounting insertion hole (311) to fix the frame-type bookshelf (303) on the bookshelf tray (302).

8. The rotary bookstore of claim 7, further comprising: the edge of the lower end of the bookshelf tray (302) at the bottom layer is provided with a jack (314), the upper end face of the tray (201) is provided with a positioning column (209), the positioning column (209) is inserted into the jack (314), and the bookshelf component (3) is integrally fixed on the rotary tray (201).

9. The rotary bookstore according to any one of claims 1 to 8, characterised in that: the light-transmitting outer cover (4) comprises a middle ring (204), stand columns (403) and a top cover (401), the middle ring (404) divides the light-transmitting outer cover (4) into an upper layer and a lower layer, the upper end face and the lower end face of the middle ring (404) are fixedly connected with a plurality of stand columns (403), the upper ends of the stand columns (403) arranged on the upper end face of the middle ring are fixedly connected with the top cover (401), the lower ends of the stand columns (403) arranged on the lower end face of the middle ring are fixedly connected with the base (1), and fixed glass (402) or sliding glass (405) is arranged between two adjacent stand columns (403) at; the fixed glass (402) and the sliding glass (405) are arc-shaped, and the sliding glass (405) is provided with a handle.

10. The rotary bookstore of claim 9, further comprising: an upper end face sliding glass groove (407) and an upper end face fixing glass groove (409) are formed in the upper end face of the middle ring (404), and a lower end face sliding glass groove (408) and a lower end face fixing glass groove (410) are formed in the lower end face of the middle ring (204); a top cover fixing glass groove (411) and a top cover sliding glass groove (412) are formed in the lower end face of the top cover (401); upright post rivets (413) are arranged at the upper end and the lower end of the upright post (403), a plurality of middle ring insertion holes (414) are uniformly distributed on the upper end surface and the lower end surface of the middle ring (404) along the circumference, and a top cover insertion hole (406) is arranged on the lower end surface of the top cover (401); the upright post rivet (413) of the upright post (403) on the upper layer is inserted into the top cover insertion hole (406) and the middle ring insertion hole (414) on the upper end surface of the middle ring (404), and the top cover (401) and the middle ring (404) are fixedly riveted; a plurality of jacks (108) are uniformly distributed on the upper edge of the base (1) along the circumference, the upright rivets (413) of the upright posts (403) on the lower layer are inserted into the jacks (108) and the middle ring jacks (414) on the lower end surface of the middle ring (404), and the base (1) and the middle ring (404) are fixedly riveted; a fixed glass groove (112) and a sliding glass groove (113) are arranged between the jacks (108) along the radial direction; a fixed glass (402) is arranged between the upper end face fixed glass groove (409) and the top cover fixed glass groove (411), and a fixed glass (402) is arranged between the lower end face fixed glass groove (410) and the fixed glass groove (112); a sliding glass (405) is arranged between the upper end face sliding glass groove (407) and the top cover sliding glass groove (412), and a sliding glass (405) is arranged between the lower end face sliding glass groove (408) and the sliding glass groove (113).

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