CN210809824U - Height-adjustable's reading bookshelf - Google Patents

Abstract

The utility model discloses a height-adjustable's reading bookshelf relates to bookshelf technical field. The automatic feeding device comprises a base, a first screw rod, a second screw rod, a first sleeve, a second sleeve, a first supporting plate, a second supporting plate, a first guide plate and a second guide plate, the lower end of the first screw rod and the lower end of the second screw rod are connected with a driving device, the inner cylinder wall of the first sleeve and the inner cylinder wall of the second sleeve are provided with internal threads, the lower end of the first guide plate and the lower end of the second guide plate are connected with one end of the base, the first sleeve is matched with the first screw rod, the first sleeve is connected with the first supporting plate, the upper end of the first supporting plate is provided with a first limiting hook, the first supporting plate is connected with the first guide plate in a sliding mode, the second sleeve is matched with the second screw rod, the second sleeve is connected with the second supporting plate, the upper end of the second supporting plate is provided with a second limiting hook, and the second supporting plate is connected with the second guide. The utility model discloses can the not books of co-altitude of centre gripping.

Description

Height-adjustable's reading bookshelf

Technical Field

The utility model relates to a bookshelf technical field, concretely relates to height-adjustable's reading bookshelf.

Background

To facilitate reading and avoid holding the head down for a long time, chinese patent application No. 201720771826.7 discloses a reading bookshelf and a reading table, which can stand up a book for reading. As shown in fig. 11, in this prior art, the upper end of the book is limited by providing a second limiting assembly 300, which includes an elastic pressing sheet 310 and a connecting member 320 for connecting the elastic pressing sheet and the back plate 100, wherein the elastic pressing sheet 310 and the connecting member 320 can be horizontally and rotatably connected. The connection between the elastic pressing sheet 310 and the back plate 100 is realized through the connecting piece 320, wherein the intersection point of the elastic pressing sheet 310 and the connecting piece 320 is a rotation point, and the elastic pressing sheet 310 rotates around the rotation point to press the upper end of the book after page turning.

However, since the position of the second limiting assembly 300 in the prior art is fixed, a book with a height higher than that of the second limiting assembly 300 cannot be clamped, and therefore, how to clamp books with different heights is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The utility model discloses it is not enough to the above-mentioned that prior art exists, provides a height-adjustable's reading bookshelf, the utility model discloses can the not books of co-altitude of centre gripping.

In order to realize the purpose, the utility model discloses a technical scheme is:

a height-adjustable reading bookshelf comprises a base, a first screw rod, a second screw rod, a first sleeve, a second sleeve, a first supporting plate, a second supporting plate, a first guide plate and a second guide plate, wherein the lower end of the first screw rod and the lower end of the second screw rod are connected with a driving device, inner threads are arranged on the inner cylinder wall of the first sleeve and the inner cylinder wall of the second sleeve, the lower ends of the first guide plate and the second guide plate are connected with one end of the base, the first sleeve is matched with the first screw rod and connected with the first supporting plate, a first limiting hook is arranged at the upper end of the first supporting plate, the first supporting plate is connected with the first guide plate in a sliding manner, the first supporting plate slides up and down along the first guide plate, the second sleeve is matched with the second screw rod, the second sleeve is connected with the second supporting plate, a second limiting hook is arranged at the upper end of the second supporting plate, and the second supporting plate is connected with the second guide plate in a sliding manner, the second support plate slides up and down along the second guide plate.

Further, the base comprises a top plate, side plates and a bottom plate which are sequentially connected from top to bottom, and the side plates comprise a first side plate, a second side plate, a third side plate and a fourth side plate which are sequentially connected; drive arrangement includes the pivot, first driving gear, the second driving gear, first driven gear, second curb plate and fourth curb plate all are equipped with the commentaries on classics hole, pivot and commentaries on classics hole clearance fit, first driving gear and second driving gear all with the pivot key-type connection, first driven gear is connected with the lower extreme of first screw rod, second driven gear is connected with the lower extreme of second screw rod, first driving gear and first driven gear meshing, second driving gear and second driven gear meshing.

Furthermore, one side of the second side plate, which is far away from the fourth side plate, and one side of the fourth side plate, which is far away from the second side plate, are both provided with limit nuts, the outer diameter of each limit nut is larger than the aperture of each rotary hole, the two ends of each rotary shaft are both provided with external threads, and the limit nuts are matched with the end parts of the rotary shafts.

Further, the below of first backup pad is equipped with first spacing seat, and first spacing seat includes first limiting plate and first slide, and the lower extreme of first limiting plate is connected with the one end of first slide, and the lower terminal surface of bottom plate is equipped with first spout, first spout and the cooperation of first slide, and first slide slides along first spout, and the below of second backup pad is equipped with the spacing seat of second, and the spacing seat of second includes second limiting plate and second slide, and the lower extreme of second limiting plate is connected with the one end of second slide, and the lower terminal surface of bottom plate is equipped with the second spout, and the second spout cooperates with the second slide, and the second slide slides along the second spout.

Furthermore, the first sliding groove and the second sliding groove both adopt dovetail grooves.

Furthermore, be equipped with first elastic component in the first spout, the one end and the first slide of first elastic component are kept away from the one end of first limiting plate and are connected, and the one end that first slide was kept away from to first elastic component is connected with the bottom plate, is equipped with second elastic component in the second spout, and the one end and the second slide of second elastic component are kept away from the one end of second limiting plate and are connected, and the one end that second slide was kept away from to the second elastic component is connected with the bottom plate.

Furthermore, one side of the top plate is provided with an expansion groove and an expansion plate, the expansion plate is matched with the expansion groove, the expansion plate slides in the expansion groove, one side of the expansion plate, which is far away from the top plate, is provided with a support rod, and the upper end of the support rod is connected with the expansion plate.

Furthermore, the upper end face of the expansion plate is provided with a groove for placing a water cup.

The utility model discloses beneficial effect who has:

1. the utility model discloses a first screw rod of drive arrangement drive and second screw rod rotate, carry first backup pad with first screw rod screw-thread fit's first sleeve and reciprocate along first deflector, carry the second backup pad with second screw rod screw-thread fit's second sleeve and reciprocate along the second deflector, along with reciprocating of first backup pad and second backup pad, the spacing hook of second in first spacing hook and the second backup pad that can make first backup pad upper end also reciprocates, thereby can adjust the height of first spacing hook and the spacing hook of second according to the height of different books, make the page of the books that first spacing hook and second spacing hook can the centre gripping co-altitude not, make the books that turn over keep erectting, thereby be convenient for people to read and study.

2. Through setting up stop nut, can only let the pivot rotate, and can not let the pivot remove along the axis direction of pivot, improved the reliability that the pivot was installed on second curb plate, fourth curb plate.

3. Through setting up the spacing seat of first spacing seat and second, can let books receive the basis of stopping of first spacing hook and the spacing hook of second, the lower extreme that still enables books receives stopping of first limiting plate and second limiting plate, makes the direction that the lower extreme unable normal direction of books kept away from first curb plate slide to the stability of books on the desk has been improved.

4. Through adopting the dovetail, can make first slide receive the ascending supporting role of the cell wall of first spout and prevent that first slide from dropping downwards in the first spout, make the second slide receive the ascending supporting role of the cell wall of second spout and avoid the second slide to drop downwards in the second spout, improved first slide and first spout complex reliability, improved second slide and second spout complex reliability.

5. Through setting up first elastic component and second elastic component, can be when the first limiting plate of pulling and second limiting plate, first elastic component and second elastic component all are in tensile state, make first slide be dragged by first elastic component and remove to the direction that is close to first elastic component, the second slide is dragged by the second elastic component and removes to the direction that is close to the second elastic component, so make the book of placing above first slide press from both sides between first limiting plate and first curb plate, make the book of placing above the second slide press from both sides between second limiting plate and first curb plate, improve the vertical stability of placing of book.

6. By arranging the expansion groove, the expansion plate and the supporting rod, the expansion plate can be drawn out from the expansion groove to expose the expansion plate when the expansion plate needs to be used, so that the area of the top plate is enlarged, and articles can be conveniently placed; when the expansion board is not needed, the expansion board is inserted into the expansion groove, so that the expansion board is convenient to use, and the space can be saved.

7. Through setting up the recess, can prevent that the drinking cup from sliding on expanding the board when the drinking cup is put in the recess, improve the stability that the drinking cup was placed on expanding the board.

Drawings

FIG. 1 is a schematic structural view of a base in accordance with embodiment 1;

FIG. 2 is a schematic view showing the structure of a height adjustable reading shelf according to embodiment 1 without a first side plate;

FIG. 3 is a first schematic view showing a first height-adjustable reading bookshelf according to the embodiment 1;

FIG. 4 is a second schematic structural view of a height adjustable reading shelf according to the embodiment 1;

FIG. 5 is a view showing a state of use of the height adjustable reading shelf according to the embodiment 1;

FIG. 6 is a first schematic view showing a first height-adjustable reading bookshelf according to embodiment 2;

FIG. 7 is a second schematic structural view of a height adjustable reading shelf according to the embodiment 2;

FIG. 8 is a view showing a state of use of the height adjustable reading shelf according to the embodiment 2;

FIG. 9 is a schematic structural view of a base according to embodiment 3;

FIG. 10 is a view showing a state of use of the height adjustable reading shelf according to the embodiment 3;

fig. 11 is a schematic structural diagram of the prior art.

In the figure:

1-base, 1-1-top plate, 1-1-1-first through hole, 1-1-2-second through hole, 1-1-3-placing groove, 1-1-4-expanding groove, 1-2-bottom plate, 1-2-1-fixing groove, 1-2-2-first sliding groove, 1-2-3-second sliding groove, 1-3-first side plate, 1-4-second side plate, 1-5-third side plate, 1-6-fourth side plate, 1-6-1-window, 1-7-rotary hole, 2-first screw rod, 3-second screw rod, 4-first fixing nut and 5-second fixing nut, 6-a first sleeve, 7-a first supporting plate, 7-1-a first limit hook, 8-a second sleeve, 9-a second supporting plate, 9-1-a second limit hook, 10-a first guide plate, 10-1-a first guide groove, 11-a second guide plate, 11-1-a second guide groove, 12-a rotating shaft, 13-a first driving gear, 14-a second driving gear, 15-a first driven gear, 16-a second driven gear, 17-a limit nut, 18-a handle, 19-a drawer, 19-1-a position avoiding hole, 19-a 2-baffle, 20-a first limit seat, 20-1-a first limit plate, 20-2-a first sliding plate, 21-a second limit seat, 21-1-a second limiting plate, 21-2-a second sliding plate, 22-a first elastic part, 23-a second elastic part, 24-a book, 25-a desk lamp, 25-1-a desk lamp holder, 26-a spreading plate, 26-1 grooves, 27-a supporting rod and 28-a water cup.

100-back plate, 300-second limiting component, 310-elastic pressing sheet and 320-connecting piece.

Detailed Description

For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings. It is noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1

A height-adjustable reading bookshelf is shown in figure 2 and comprises a base 1, a first screw rod 2, a second screw rod 3, a first sleeve 6, a second sleeve 8, a first supporting plate 7, a second supporting plate 9, a first guide plate 10, a second guide plate 11 and a driving device.

As shown in FIG. 1, the base 1 comprises a top plate 1-1, side plates and a bottom plate 1-2 which are welded and fixed from top to bottom in sequence. The side plates comprise a first side plate 1-3, a second side plate 1-4, a third side plate 1-5 and a fourth side plate 1-6 which are sequentially welded and fixed end to end.

As shown in FIG. 1, the front end of the top plate 1-1 is provided with a first through hole 1-1-1 and a second through hole 1-1-2. As shown in fig. 2, the first through hole 1-1-1 is in clearance fit with the first screw rod 2, and the first screw rod 2 rotates in the first through hole 1-1-1; the second through hole 1-1-2 is in clearance fit with the second screw rod 3, and the second screw rod 3 rotates in the second through hole 1-1-2. The upper end surface of the top plate 1-1 and the lower end surface of the top plate 1-1 are respectively provided with a first fixing nut 4 which is in threaded fit with the first screw 2; and the upper end surface of the top plate 1-1 and the lower end surface of the top plate 1-1 are respectively provided with a second fixing nut 5 which is in threaded fit with the second screw 3. The height position of the first screw rod 2 can be fixed by arranging the first fixing nut 4, so that the first screw rod 2 is prevented from moving upwards or downwards, and the first screw rod 2 can only rotate in the first through hole 1-1-1; through the arrangement of the second fixing nut 5, the height position of the second screw rod 3 can be fixed, the second screw rod 3 is prevented from moving upwards or downwards, and the second screw rod 3 can only rotate in the second through hole 1-1-2.

As shown in fig. 2, the upper portion of the first screw rod 2 is sleeved with a first sleeve 6, the inner cylinder wall of the first sleeve 6 is provided with internal threads, the first sleeve 6 is in threaded fit with the first screw rod 2, and the first sleeve 6 is welded and fixed with the lower end of the first support plate 7. The upper portion cover of second screw rod 3 has second sleeve 8, and the inner tube wall of second sleeve 8 is equipped with the internal thread, and second sleeve 8 and 3 screw-thread fit of second screw rod, the lower extreme welded fastening of second sleeve 8 and second backup pad 9. The upper end of the first supporting plate 7 is provided with a first limiting hook 7-1 for hooking the book 24, and the upper end of the second supporting plate 9 is provided with a second limiting hook 9-1 for hooking the book 24.

As shown in fig. 2, the first guide plate 10 and the second guide plate 11 are both disposed above the top plate 1-1, and the lower end of the first guide plate 10 and the lower end of the second guide plate 11 are both welded and fixed to the front end of the top plate 1-1. A first guide groove 10-1 is formed in the front side of the first guide plate 10, the first support plate 7 is matched with the first guide groove 10-1, and the first support plate 7 slides up and down along the first guide groove 10-1; the front side of the second guide plate 11 is provided with a second guide groove 11-1, the second support plate 9 is matched with the second guide groove 11-1, and the second support plate 9 slides up and down along the second guide groove 11-1.

As shown in fig. 2, the driving device includes a rotating shaft 12, a first driving gear 13, a second driving gear 14, a first driven gear 15, and a second driven gear 16. The first driving gear 13, the second driving gear 14, the first driven gear 15, and the second driven gear 16 are all bevel gears. As shown in fig. 1, the second side plate 1-4 and the fourth side plate 1-6 are provided with rotation holes 1-7. As shown in fig. 2, the rotating shaft 12 is in clearance fit with the rotating holes 1 to 7, the rotating shaft 12 rotates in the rotating holes 1 to 7, the side of the second side plate 1 to 4 away from the fourth side plate 1 to 7 and the side of the fourth side plate 1 to 7 away from the second side plate 1 to 4 are both provided with a limiting nut 17, the outer diameter of the limiting nut 17 is larger than the aperture of the rotating hole 1 to 7, both ends of the rotating shaft 12 are both provided with external threads, and the limiting nut 17 is in threaded fit with the end part of the rotating shaft 12. First driving gear 13 and second driving gear 14 all with 12 key-type connections of pivot, first driven gear 15 and the lower extreme welded fastening of first screw rod 2, second driven gear 16 and the lower extreme welded fastening of second screw rod 3, first driving gear 13 and the meshing of first driven gear 15, second driving gear 14 and the meshing of second driven gear 16. By arranging the limiting nut 17, only the rotating shaft 12 can rotate, but the rotating shaft 12 cannot move left and right along the axis direction of the rotating shaft 12, so that the reliability of the rotating shaft 12 arranged on the second side plate 1-4 and the fourth side plate 1-6 is improved.

Further, as shown in fig. 2, in order to facilitate rotation of the rotating shaft 12, a handle 18 is disposed at the right end of the rotating shaft 12, and the handle 18 is welded to the rotating shaft 12.

In use, as shown in fig. 2, the handle 18 is shaken to rotate the rotating shaft 12, the first driving gear 13 and the second driving gear 14 which are connected with the rotating shaft 12 in a key way rotate along with the rotating shaft 12, a first driven gear 15 engaged with the first driving gear 13 rotates with the first driving gear 13, a second driven gear 16 engaged with the second driving gear 14 rotates with the second driving gear 14, the first screw 2 welded and fixed with the first driven gear 15 rotates with the first driven gear 15, the second screw 3 welded and fixed with the second driven gear 16 rotates along with the second driven gear 16, and along with the rotation of the first screw 2, the first sleeve 6, which is screw-engaged with the first screw 2, carries the first support plate 7 up and down along the first guide groove 10-1, and the second sleeve 8, which is screw-engaged with the second screw 3, carries the second support plate 9 up and down along the second guide groove 11-1. Along with the up-and-down movement of the first support plate 7 and the second support plate 9, the first limit hook 7-1 at the upper end of the first support plate 7 and the second limit hook 9-1 on the second support plate 9 can move up and down, so that as shown in fig. 5, the heights of the first limit hook 7-1 and the second limit hook 9-1 can be adjusted according to the heights of different books 24, the first limit hook 7-1 and the second limit hook 9-1 can hook pages of the books 24 with different heights, and the books 24 after being turned are kept upright.

Further, as shown in fig. 1, in order to conveniently store articles by using the inner cavity of the base 1, a window 1-6-1 communicated with the inner cavity of the base 1 is arranged at the lower end of the fourth side plate 1-6, the window 1-6-1 is communicated with the inner cavity of the base 1 to form an accommodating cavity, and as shown in fig. 3, a drawer 19 is arranged in the accommodating cavity. When placing portable power source, for example when the treasured charges in drawer 19, in order to use portable power source conveniently, drawer 19's lateral wall is equipped with the aversion hole 19-1 that is used for portable power source's data line to pass. When the mobile phone is used, the data wire of the mobile power supply directly penetrates through the avoiding hole 19-1, and then one end, far away from the mobile power supply, of the data wire is inserted into a charging port of the mobile phone. By installing the portable power source in the drawer 19, the space of the table top can be saved.

Further, as shown in fig. 3, a baffle plate 19-2 is arranged below the drawer 19, the upper end of the baffle plate 19-2 is welded and fixed with the drawer 19, a fixing groove 1-2-1 is arranged on the left side of the bottom plate 1-2, and the fixing groove 1-2-1 is matched with the baffle plate 19-2. By arranging the baffle plate 19-2 and the fixing groove 1-2-1, when the drawer 19 is inserted into the accommodating cavity, as shown in fig. 4, the baffle plate 19-2 is also inserted into the fixing groove 1-2-1, so that the drawer 19 is prevented from protruding out of the fourth side plate 1-6, and the whole base 1 is more flat. Moreover, after the baffle plate 19-2 is arranged, after the drawer 19 is pulled out, as shown in fig. 3, the drawer 19 is supported by the upper end surface of the bottom plate 1-2 and the baffle plate 19-2, and the stability of the drawer 19 is improved.

Example 2

The embodiment 2 is the same as the embodiment 1, except that in the embodiment 2, as shown in fig. 6 or fig. 7, a first limiting seat 20 is arranged below the first support plate 7, the first limiting seat 20 includes a first limiting plate 20-1 vertically arranged and a first sliding plate 20-2 horizontally arranged, a lower end of the first limiting plate 20-1 is welded and fixed to a front end of the first sliding plate 20-2, a first sliding groove 1-2-2 is arranged on a lower end surface of the bottom plate 1-2, the first sliding groove 1-2-2 is matched with the first sliding plate 20-2, and the first sliding plate 20-2 slides back and forth along the first sliding groove 1-2-2. A second limiting seat 21 is arranged below the second supporting plate 9, the second limiting seat 21 comprises a second limiting plate 21-1 which is vertically arranged and a second sliding plate 21-2 which is horizontally arranged, the lower end of the second limiting plate 21-1 is welded and fixed with the front end of the second sliding plate 21-2, a second sliding groove 1-2-3 is arranged on the lower end face of the bottom plate 1-2, the second sliding groove 1-2-3 is matched with the second sliding plate 21-2, and the second sliding plate 21-2 slides back and forth along the second sliding groove 1-2-3.

When the sliding plate is used, the first limiting plate 20-1 and the second limiting plate 21-1 are pulled firstly, and a section of the first sliding plate 20-2 close to the first limiting plate 20-1 and a section of the second sliding plate 21-2 close to the second limiting plate 21-1 are exposed; then the page-turned book 24 is placed on the upper end surface of the first sliding plate 20-2 and the upper end surface of the second sliding plate 21-2, and the upper end of the page-turned book 24 is hooked by the first limiting hook 7-1 and the second limiting hook 9-1, as shown in fig. 8, so that the page-turned book 24 is not only blocked by the first limiting hook 7-1 and the second limiting hook 9-1, but also the lower end of the page-turned book 24 is blocked by the first limiting plate 20-1 and the second limiting plate 21-1, and the lower end of the page-turned book 24 cannot slide forward, thereby improving the stability of the page-turned book 24 standing on a desk.

Further, in order to prevent the first slide plate 20-2 from falling downward from the first runner 1-2-2 and the second slide plate 21-2 from falling downward from the second runner 1-2-3, as shown in FIG. 7, the first runner 1-2-2 and the second runner 1-2-3 are formed in dovetail grooves, so that the first slide plate 20-2 is supported upward by the wall of the first runner 1-2-2 to prevent the first slide plate 20-2 from falling downward from the first runner 1-2-2, the second slide plate 21-2 is supported upward by the wall of the second runner 1-2-3 to prevent the second slide plate 21-2 from falling downward from the second runner 1-2-3, and the reliability of the first slide plate 20-2 in cooperation with the first runner 1-2-2 is improved, The reliability of the second sliding plate 21-2 and the second sliding chute 1-2-3.

Further, in order to further improve the fixing effect of the first limiting plate 20-1 and the second limiting plate 21-1 on the book, as shown in fig. 6, a first elastic member 22 is arranged in the first chute 1-2-2, the front end of the first elastic member 22 is welded and fixed with the rear end of the first sliding plate 20-2, and the rear end of the first elastic member 22 is welded and fixed with the bottom plate 1-2; a second elastic part 23 is arranged in the second sliding chute 1-2-3, the front end of the second elastic part 23 is welded and fixed with the rear end of the second sliding plate 21-2, and the rear end of the second elastic part 23 is welded and fixed with the bottom plate 1-2. Specifically, the first elastic member 22 and the second elastic member 23 are both springs.

When the sliding plate is used, the first limiting plate 20-1 and the second limiting plate 21-1 are pulled firstly, and a section of the first sliding plate 20-2 close to the first limiting plate 20-1 and a section of the second sliding plate 21-2 close to the second limiting plate 21-1 are exposed; then the page-turned book 24 is placed on the upper end surface of the first sliding plate 20-2 and the upper end surface of the second sliding plate 21-2, and the upper end of the page-turned book 24 is hooked by the first limit hook 7-1 and the second limit hook 9-1, because the first elastic member 22 and the second elastic member 23 are both in a stretching state when the first limit plate 20-1 and the second limit plate 21-1 are pulled, the first sliding plate 20-2 is pulled by the first elastic member 22 to move towards the direction close to the first elastic member 22, and the second sliding plate 21-2 is pulled by the second elastic member 23 to move towards the direction close to the second elastic member 23, the page-turned book 24 placed above the first sliding plate 20-2 is clamped between the first limit plate 20-1 and the first side plate 1-3, and the page-turned book 24 placed above the second sliding plate 21-2 is clamped between the second limit plate 21-1 and the first side plate 13, the stability of the vertical placement of the page-turned book 24 is improved.

Besides the books 24 are placed on the upper end face of the first sliding plate 20-2 and the upper end face of the second sliding plate 21-2, the tablet personal computer and the mobile phone can be placed on the upper end face of the first sliding plate 20-2 and the upper end face of the second sliding plate 21-2 and used as supports of the tablet personal computer and the mobile phone, and the use is convenient and flexible.

Example 3

This embodiment 3 is the same as embodiment 2 except that in this embodiment 3, as shown in fig. 9, a placement groove 1-1-3 for placing a table lamp 25 is provided on the upper end surface of a top plate 1-1. When the desk lamp is used, as shown in fig. 10, the desk lamp holder 25-1 of the desk lamp 25 is directly placed in the placing groove 1-1-3, and the arrangement is such that the groove wall of the placing groove 1-1-3 limits the movement of the desk lamp holder 25-1 of the desk lamp 25, thereby improving the stability of placing the desk lamp 25 on the top plate 1-1.

Further, as shown in fig. 9, an expansion groove 1-1-4 is formed in the right side of the top plate 1-1, an expansion plate 26 is arranged in the expansion groove 1-1-4, the expansion plate 26 is matched with the expansion groove 1-1-4, the expansion plate 26 slides in the expansion groove 1-1-4, a support rod 27 is arranged on the right side of the expansion plate 26, and the upper end of the support rod 27 is welded and fixed to the expansion plate 26.

When the expansion plate 26 is used, the expansion plate 26 is firstly drawn out from the expansion groove 1-1-4 to the right, and the expansion plate 26 is in a stable state because the expansion plate 26 is supported by the groove bottom of the expansion groove 1-1-4 and the support rod 27, and at the moment, things can be placed on the expansion plate 26. When the expansion plate 26 is not needed, the original things on the expansion plate 26 are taken away, then the expansion plate 26 is pushed leftwards, so that the expansion plate 26 is inserted into the expansion groove 1-1-4, when the expansion plate 26 is inserted into the expansion groove 1-1-4, the supporting rod 27 is blocked at the right side of the top plate 1-1, the expansion plate 26 can be prevented from being completely inserted into the expansion groove 1-1-4, and the expansion plate 26 can be conveniently pulled rightwards again.

By arranging the expansion grooves 1-1-4, the expansion plates 26 and the supporting rods 27, when the expansion plates 26 need to be used, the expansion plates 26 can be pulled rightwards to expose the expansion plates 26, so that the area of the top plate 1-1 is enlarged, and articles can be conveniently placed; when the expansion plate 26 is not needed, the expansion plate 26 is pushed to the left to insert the expansion plate 26 into the expansion slot 1-1-4. Thereby providing convenience and space savings in using the expansion board 26.

Further, as shown in fig. 9 and 10, the upper end surface of the expansion plate 26 is provided with a groove 26-1 for placing the cup 28. By placing the water cup 28 in the groove 26-1 on the upper end surface of the expansion plate 26, the water cup 28 can be prevented from sliding on the expansion plate 26, and the stability of placing the water cup 28 on the expansion plate 26 can be improved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. A height-adjustable reading bookshelf is characterized by comprising a base, a first screw rod, a second screw rod, a first sleeve, a second sleeve, a first supporting plate, a second supporting plate, a first guide plate and a second guide plate, wherein the lower end of the first screw rod and the lower end of the second screw rod are connected with a driving device, the inner cylinder wall of the first sleeve and the inner cylinder wall of the second sleeve are respectively provided with an internal thread, the lower end of the first guide plate and the lower end of the second guide plate are respectively connected with one end of the base, the first sleeve is matched with the first screw rod and connected with the first supporting plate, the upper end of the first supporting plate is provided with a first limiting hook, the first supporting plate is connected with the first guide plate in a sliding manner, the first supporting plate slides up and down along the first guide plate, the second sleeve is matched with the second screw rod and connected with the second supporting plate, the upper end of the second supporting plate is provided with a second limiting hook, the second supporting plate is connected with the second guide plate in a sliding mode, and the second supporting plate slides up and down along the second guide plate.

2. The height-adjustable reading bookshelf according to claim 1, wherein the base comprises a top plate, side plates and a bottom plate which are sequentially connected from top to bottom, and the side plates comprise a first side plate, a second side plate, a third side plate and a fourth side plate which are sequentially connected;

drive arrangement includes the pivot, first driving gear, the second driving gear, first driven gear, second curb plate and fourth curb plate all are equipped with the commentaries on classics hole, pivot and commentaries on classics hole clearance fit, first driving gear and second driving gear all with the pivot key-type connection, first driven gear is connected with the lower extreme of first screw rod, second driven gear is connected with the lower extreme of second screw rod, first driving gear and first driven gear meshing, second driving gear and second driven gear meshing.

3. The height-adjustable reading bookshelf according to claim 2, wherein the side of the second side plate away from the fourth side plate and the side of the fourth side plate away from the second side plate are both provided with a stop nut, the outer diameter of the stop nut is larger than the diameter of the rotating hole, both ends of the rotating shaft are provided with external threads, and the stop nut is matched with the end part of the rotating shaft.

4. A height-adjustable bookrack according to claim 2, wherein the first support plate is provided with a first limiting seat below, the first limiting seat comprises a first limiting plate and a first sliding plate, the lower end of the first limiting plate is connected to one end of the first sliding plate, the bottom plate is provided with a first sliding groove on the lower end surface, the first sliding groove is matched with the first sliding plate, the first sliding plate slides along the first sliding groove, the second support plate is provided with a second limiting seat below, the second limiting seat comprises a second limiting plate and a second sliding plate, the lower end of the second limiting plate is connected to one end of the second sliding plate, the bottom plate is provided with a second sliding groove on the lower end surface, the second sliding groove is matched with the second sliding plate, and the second sliding plate slides along the second sliding groove.

5. The height-adjustable reading bookshelf according to claim 4, wherein the first sliding groove and the second sliding groove are dovetail grooves.

6. The height-adjustable reading bookshelf according to claim 4, wherein a first elastic member is arranged in the first sliding groove, one end of the first elastic member is connected with one end of the first sliding plate away from the first limiting plate, one end of the first elastic member away from the first sliding plate is connected with the bottom plate, a second elastic member is arranged in the second sliding groove, one end of the second elastic member is connected with one end of the second sliding plate away from the second limiting plate, and one end of the second elastic member away from the second sliding plate is connected with the bottom plate.

7. The height-adjustable reading bookshelf according to claim 2, wherein one side of the top plate is provided with an expansion groove and an expansion plate, the expansion plate is matched with the expansion groove, the expansion plate slides in the expansion groove, one side of the expansion plate, which is far away from the top plate, is provided with a support rod, and the upper end of the support rod is connected with the expansion plate.

8. The height-adjustable reading bookshelf according to claim 7, wherein the upper end surface of the expansion plate is provided with a groove for placing a water cup.

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