CN108937200B

CN108937200B - Adjustable bookshelf

Info

Publication number: CN108937200B
Application number: CN201810672116.8A
Authority: CN
Inventors: 汪玉洁
Original assignee: Sixian Weiteng Intellectual Property Operation Co Ltd
Current assignee: Sixian weiteng Intellectual Property Operation Co., Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2021-02-12
Anticipated expiration: 2038-06-26
Also published as: CN108937200A

Abstract

The invention relates to the field of life, in particular to an adjustable bookshelf, which comprises a first storage structure, a support plate, a driving structure, a second storage structure, a third storage structure, a limiting structure and a guide rail, wherein the first storage structure is arranged on the support plate; the first storage structure for storing books is fixed on the supporting plate; the supporting plate is provided with a guide rail with a trapezoidal structure for guiding; the third containing structure for storing books in a classified mode is connected with the guide rail in a sliding mode; the limiting structure used for adjusting the storage space in the third containing structure is abutted against the third containing structure; a driving structure is arranged between the third containing structure and the first containing structure; the driving structure is fixed with a second storage structure for storing small articles. The third containing structure is matched with the limiting structure for use, so that the size of the storage space inside the third containing structure can be conveniently adjusted, different books can be conveniently stored in a classified mode, the books can be conveniently and quickly searched and stored, and the books can be conveniently stored by using the driving structure.

Description

Adjustable bookshelf

Technical Field

The invention relates to the field of life, in particular to an adjustable bookshelf.

Background

The bookshelf is a special appliance for placing books for people, and due to the fact that the bookshelf is different in shape and structure and has other names such as a bookcase, a bookcase and a book partition, the bookshelf is a common tool in our lives, books can be conveniently inquired and stored by using the bookshelf, and space utilization efficiency of the bookshelf plays an important role.

However, the traditional bookshelf is placed above a desk, the position of the bookshelf is placed too low, the desk can be used by a user, the storage of books can be affected due to the too high position of the bookshelf, the stability performance of the bookshelf is poor, and the storage chamber of the bookshelf is inconvenient to adjust in space size. In view of this, the present invention provides an adjustable bookshelf, which has the following characteristics:

(1) according to the adjustable bookshelf, the third containing structure is matched with the limiting structure, so that the size of the storage space in the third containing structure can be conveniently adjusted, different books can be conveniently classified and stored, and the books can be conveniently and quickly searched and stored.

(2) According to the adjustable bookshelf, one end of the driving structure is fixed to the third storage structure, the other end of the driving structure is fixed to the first storage structure, the driving structure is convenient to adjust, the third storage structure slides on the guide rail, the position of the third storage structure is adjusted, books are more convenient to store, and the space utilization efficiency is greatly improved.

(3) According to the adjustable bookshelf, the second storage structure is used, so that the driving structure can be adjusted more conveniently, and the bookshelf can be fixed on a desktop conveniently by matching with the first storage structure, so that the stability of the bookshelf is improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an adjustable bookshelf, wherein a third storage structure is matched with a limiting structure for use, the size of a storage space inside the third storage structure can be conveniently adjusted, different books can be conveniently and rapidly sorted and stored, the books can be conveniently and rapidly searched and stored, one end of a driving structure is fixed to the third storage structure, the other end of the driving structure is fixed to the first storage structure, the driving structure can be conveniently adjusted, the third storage structure can slide on a guide rail, the position of the third storage structure can be adjusted, the books can be conveniently stored, the space utilization efficiency is greatly improved, the driving structure can be more conveniently adjusted by using the second storage structure, the bookshelf can be conveniently fixed on a desktop by matching with the first storage structure, and the stability of the bookshelf is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: an adjustable bookshelf comprises a first storage structure, a support plate, a driving structure, a second storage structure, a third storage structure, a limiting structure and a guide rail; the first receiving structure for storing books is fixed on the supporting plate; the guide rail with a trapezoidal structure for guiding is arranged on the supporting plate; the third accommodating structure for storing books in a classified mode is connected with the guide rail in a sliding mode; the limiting structure used for adjusting the storage space in the third accommodating structure is abutted against the third accommodating structure; the driving structure is arranged between the third accommodating structure and the first accommodating structure; the driving structure is fixed with the second storage structure for storing small articles.

Specifically, the first accommodating structure comprises a plurality of first partition plates, a plurality of accommodating chambers and baffle plates, the supporting plate is of a 7-shaped structure, the baffle plates are vertically fixed on the supporting plate, the first partition plates are vertically arranged between the baffle plates and the supporting plate, and the accommodating chambers for storing books in a classified manner are arranged between two adjacent first partition plates; when the book storage room is used, the support plate is fixed on the side edge of the desktop through the bolts, the support plate is made to abut against the wall body, books are stored in the storage room in a classified mode, the support plate is of a 7-shaped structure, and stability is improved.

Specifically, the third containing structure comprises a fixed frame, a plurality of second partition plates, a third partition plate, a storage chamber, a first sliding groove, a second sliding groove and a sliding block, the fixed frame with a rectangular structure is in sliding connection with the guide rail with a trapezoidal structure, the fixed frames correspond to the baffles one by one, the second partition plates are pairwise and vertically fixed in the fixed frames, the third partition plate is vertically fixed between the two second partition plates in each group, the second partition plates are matched with the third partition plates to enclose the fixed frames into a plurality of storage chambers with different sizes for classified storage of books, the bottom end of the fixed frame is provided with the second sliding groove for guiding, the sliding block which is of a rectangular structure and is used for limiting and arranged at the bottom end of the second partition plate is connected with the second sliding groove in a sliding mode, and the top end of the fixed frame is provided with the first sliding groove for guiding and limiting; when carrying out classified storage to different books, adjust every group distance between the second baffle to the storage space of control books, it is a plurality of the cooperation of second baffle the third baffle will fixed frame encloses into a plurality of variation in size and is used for the classified storage books the locker room is convenient for with the books classified storage of variation in size, makes books storage, inquiry more convenient, has improved books storage efficiency and quality, the cooperation of second spout the use of slider is convenient for right the second baffle is spacing, has improved the steadiness.

Specifically, the limiting structure comprises a limiting spring, a limiting block and limiting teeth, the limiting block of a trapezoidal structure for limiting penetrates through the first chute and extends to the second partition plate, the limiting block is connected with the second partition plate in a sliding manner, the limiting spring is arranged at one end, close to the second partition plate, of the limiting block, the limiting spring is arranged inside the second partition plate, and the limiting teeth of a triangular structure for matching with the fixing frame for limiting are arranged at one end, close to the fixing frame, of the limiting block; press the stopper, the stopper with first spout slides, the stopper with the second baffle slides, the drive spacing spring shrink, spacing tooth with fixed frame is not contradicted, slides the second baffle changes the size of locker room, when loosening during the stopper, spacing spring extension drive on the stopper spacing tooth is contradicted fixed frame is right the second baffle carries on spacingly, setting up of spacing tooth has improved the stopper with steadiness between the fixed frame.

Specifically, the driving structure comprises an adjusting rod and a sleeve, the sleeve of the cylindrical structure is rotatably connected with the fixed frame, the adjusting rod is fixed on the baffle, and the sleeve is in threaded connection with the adjusting rod; the drive the sleeve rotates, the sleeve with threaded connection, drive between the regulation pole fixed frame is in slide on the guide rail, then adjust fixed frame is in position on the guide rail, thereby adjust fixed frame with distance between the baffle makes the storage books more convenient, improves space utilization efficiency simultaneously, the sleeve with threaded connection between the regulation pole is convenient for right fixed frame is spacing, makes the operation more convenient.

Specifically, the second accommodating structure comprises a fixed disc and a plurality of limiting holes, the fixed disc of the disc-shaped structure for driving the sleeve is fixed at one end of the sleeve, which is far away from the fixed frame, and the fixed disc is provided with a plurality of disc-shaped limiting holes with different sizes for classifying and storing small articles; hold the fixed disk drive the sleeve rotates, the setting up of fixed disk makes the drive the sleeve is more convenient, is convenient for simultaneously the less article of inside storage in spacing hole has improved space utilization efficiency greatly.

The invention has the beneficial effects that:

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of an adjustable bookshelf according to a preferred embodiment of the invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of the portion B shown in FIG. 1;

FIG. 4 is a schematic view of a connection structure between the second partition board and the limiting structure shown in FIG. 1;

fig. 5 is a schematic structural view of the limiting structure shown in fig. 4.

In the figure: 1. the first storage structure, 11, the first partition plate, 12, the storage chamber, 13, the baffle, 2, the supporting plate, 3, the driving structure, 31, the adjusting rod, 32, the sleeve, 4, the second storage structure, 41, the fixed disk, 42, the limiting hole, 5, the third storage structure, 51, the fixed frame, 52, the second partition plate, 53, the third partition plate, 54, the storage chamber, 55, the first sliding chute, 56, the second sliding chute, 57, the sliding block, 6, the limiting structure, 61, the limiting spring, 62, the limiting block, 63, the limiting tooth, 7, the guide rail.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1, the adjustable bookshelf of the present invention comprises a first storage structure 1, a support plate 2, a driving structure 3, a second storage structure 4, a third storage structure 5, a limiting structure 6 and a guide rail 7; the first receiving structure 1 for storing books is fixed on the supporting plate 2; the supporting plate 2 is provided with the guide rail 7 with a trapezoidal structure for guiding; the third receiving structure 5 for classified storage of books is slidably connected with the guide rail 7; the limiting structure 6 for adjusting the storage space inside the third accommodating structure 5 is abutted against the third accommodating structure 5; the driving structure 3 is arranged between the third accommodating structure 5 and the first accommodating structure 1; the second storage structure 4 for storing small articles is fixed on the driving structure 3.

Specifically, as shown in fig. 1, the first storage structure 1 of the adjustable bookshelf of the present invention includes a plurality of first partition plates 11, a plurality of storage chambers 12 and a baffle 13, the support plate 2 is a 7-shaped structure, the baffle 13 is vertically fixed to the support plate 2, a plurality of first partition plates 11 are vertically arranged between the baffle 13 and the support plate 2, and the storage chambers 12 for storing books in a sorted manner are arranged between two adjacent first partition plates 11; when the book storage cabinet is used, the support plate 2 is fixed on the side edge of a desktop through bolts, the support plate 2 is enabled to abut against a wall body, books are stored in the storage chamber 12 in a classified mode, the support plate 2 is of a 7-shaped structure, and stability is improved.

Specifically, as shown in fig. 1, 2, 3 and 4, the third storage structure 5 of the adjustable bookshelf according to the present invention includes a fixed frame 51, a plurality of second partition plates 52, a third partition plate 53, a storage chamber 54, a first sliding groove 55, a second sliding groove 56 and a sliding block 57, the fixed frame 51 having a rectangular structure is slidably connected with the guide rail 7 having a trapezoidal structure, the fixed frame 51 corresponds to the baffle plate 13 one by one, the plurality of second partition plates 52 are vertically fixed in the fixed frame 51 in pairs, the third partition plate 53 is vertically fixed between the two second partition plates 52 in each group, the plurality of second partition plates 52 cooperate with the plurality of third partition plates 53 to enclose the fixed frame 51 into a plurality of storage chambers 54 having different sizes for storing books in a classified manner, the bottom end of the fixed frame 51 is provided with the second sliding groove 56 for guiding, the sliding block 57 for limiting in a rectangular structure at the bottom end of the second partition plate 52 is slidably connected with the second sliding groove 56, and the first sliding groove 55 for guiding and limiting is arranged at the top end of the fixed frame 51; when carrying out the classified storage to different books, adjust every group distance between the second baffle 52 to the storage space of control books, it is a plurality of the second baffle 52 cooperation is a plurality of the third baffle 53 will fixed frame 51 encloses into a plurality of size differences and is used for the classified storage books locker room 54, is convenient for with the classified storage of the books of size difference, makes books storage, inquiry more convenient, has improved books storage efficiency and quality, second spout 56 cooperation the use of slider 57 is convenient for right the second baffle 52 is spacing, has improved the steadiness.

Specifically, as shown in fig. 2, 4 and 5, the limiting structure 6 of the adjustable bookshelf comprises a limiting spring 61, a limiting block 62 and limiting teeth 63, the limiting block 62 with a trapezoidal structure for limiting penetrates through the first sliding groove 55 and extends to the second partition plate 52, the limiting block 62 is connected with the second partition plate 52 in a sliding manner, the limiting spring 61 is arranged at one end of the limiting block 62 close to the second partition plate 52, the limiting spring 61 is arranged inside the second partition plate 52, and the limiting teeth 63 with a triangular structure for limiting by matching with the fixed frame 51 are arranged at one end of the limiting block 62 close to the fixed frame 51; press the stopper 62, the stopper 62 with first spout 55 slides, the stopper 62 with the second baffle 52 slides, the drive the shrink of spacing spring 61, spacing tooth 63 with fixed frame 51 is not contradicted, slides the second baffle 52 changes the size of locker room 54, when loosening when the stopper 62, spacing spring 61 extends the drive on the stopper 62 spacing tooth 63 contradicts fixed frame 51 is right the second baffle 52 is spacing, the setting of spacing tooth 63 has improved the stopper 62 with steadiness between the fixed frame 51.

Specifically, as shown in fig. 1 and 3, the driving structure 3 of the adjustable bookshelf according to the present invention includes an adjusting rod 31 and a sleeve 32, the sleeve 32 of a cylindrical structure is rotatably connected to the fixed frame 51, the adjusting rod 31 is fixed to the baffle 13, and the sleeve 32 is in threaded connection with the adjusting rod 31; the drive the sleeve 32 rotates, the sleeve 32 with threaded connection between the regulation pole 31, the drive fixed frame 51 is in slide on the guide rail 7, then adjust fixed frame 51 is in position on the guide rail 7, thereby adjust fixed frame 51 with distance between the baffle 13 makes the storage books more convenient, improves space utilization efficiency simultaneously, the sleeve 32 with threaded connection between the regulation pole 31 is convenient for right fixed frame 51 is spacing, makes the operation more convenient.

Specifically, as shown in fig. 1 and 3, in the adjustable bookshelf according to the present invention, the second receiving structure 4 includes a fixed plate 41 and a plurality of limiting holes 42, the fixed plate 41 of the disc-shaped structure for driving the sleeve 32 is fixed at an end of the sleeve 32 away from the fixed frame 51, the fixed plate 41 is provided with a plurality of disc-shaped limiting holes 42 with different sizes for classifying and storing small articles; hold the fixed disk 41 drive the sleeve 32 rotates, the setting up of fixed disk 41 makes the drive the sleeve 32 is more convenient, is convenient for simultaneously the less article of the inside storage in spacing hole 42 has improved space utilization efficiency greatly.

Firstly, a bookshelf is fixed on a desktop through a first storage structure 1 in cooperation with a support plate 2, the support plate 2 is enabled to abut against a wall, the size of a storage space inside a third storage structure 5 is adjusted through a control limiting structure 6, a driving structure 3 is adjusted, the third storage structure 5 slides inside a guide rail 7, the position of the third storage structure 5 on the guide rail 7 is adjusted, and books are stored inside the first storage structure 1 and the third storage structure 5 in a classified mode; the method specifically comprises the following steps:

(1) firstly, the supporting plate 2 is fixed on the side edge of the desktop through bolts, so that the supporting plate 2 is pressed against a wall body, books are stored in the accommodating chamber 12 in a classified mode, and the supporting plate 2 is of a 7-shaped structure, so that stability is improved;

(2) the limiting block 62 is pressed, the limiting block 62 slides with the first sliding groove 55, the limiting block 62 slides with the second partition plates 52 to drive the limiting spring 61 to contract, the limiting teeth 63 do not collide with the fixed frame 51, the sliding second partition plates 52 change the size of the storage chamber 54, the distance between each group of second partition plates 52 is adjusted, so as to control the storage space of books, the plurality of second partition plates 52 are matched with the plurality of third partition plates 53 to enclose the fixed frame 51 into a plurality of storage chambers 54 with different sizes for storing books in a classified manner, so that the books with different sizes can be stored in a classified manner, the books can be stored and inquired more conveniently, the book storage efficiency and the book storage quality are improved, the second sliding groove 56 is matched with the sliding block 57 to limit the second partition plates 52, the stability is improved, when the limiting block 62 is loosened, the limiting teeth 63 on the limiting block 62 are driven by the limiting, the second partition plate 52 is limited, and the stability between the limiting block 62 and the fixed frame 51 is improved due to the arrangement of the limiting teeth 63;

(3) hold fixed disk 41 drive sleeve 32 and rotate, threaded connection between sleeve 32 and the regulation pole 31, the fixed frame 51 of drive slides on guide rail 7, then adjust the position of fixed frame 51 on guide rail 7, thereby adjust the distance between fixed frame 51 and the baffle 13, it is more convenient to make the storage books, improve space utilization efficiency simultaneously, threaded connection between sleeve 32 and the regulation pole 31, be convenient for carry on spacingly to fixed frame 51, it is more convenient to make the operation.

According to the invention, the third storage structure 5 is matched with the limiting structure 6 to be used, so that the size of the storage space inside the third storage structure 5 can be conveniently adjusted, different books can be conveniently and rapidly sorted and stored, the books can be conveniently and rapidly searched and stored, one end of the driving structure 3 is fixed on the third storage structure 5, the other end of the driving structure 3 is fixed on the first storage structure 1, the driving structure 3 can be conveniently adjusted, the third storage structure 5 can slide on the guide rail 7, the position of the third storage structure 5 can be adjusted, the books can be conveniently stored, the space utilization efficiency is greatly improved, the driving structure 3 can be conveniently adjusted by using the second storage structure 4, meanwhile, the bookshelf can be conveniently fixed on a desktop by matching with the first storage structure 1, and the stability of the bookshelf is improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An adjustable bookshelf is characterized in that: comprises a first containing structure (1), a support plate (2), a driving structure (3), a second containing structure (4), a third containing structure (5), a limiting structure (6) and a guide rail (7); the first receiving structure (1) for storing books is fixed on the supporting plate (2); the support plate (2) is provided with a guide rail (7) with a trapezoidal structure for guiding; the third containing structure (5) for storing books in a classified mode is connected with the guide rail (7) in a sliding mode; the limiting structure (6) used for adjusting the storage space inside the third containing structure (5) is abutted against the third containing structure (5); the driving structure (3) is arranged between the third accommodating structure (5) and the first accommodating structure (1); the second storage structure (4) for storing small articles is fixed on the driving structure (3);

the first accommodating structure (1) comprises a plurality of first partition plates (11), a plurality of accommodating chambers (12) and baffle plates (13), the supporting plate (2) is of a 7-shaped structure, the baffle plates (13) are vertically fixed on the supporting plate (2), the first partition plates (11) are vertically arranged between the baffle plates (13) and the supporting plate (2), and the accommodating chambers (12) for classifying and storing books are arranged between two adjacent first partition plates (11);

the third storage structure (5) comprises a fixed frame (51), a plurality of second partition plates (52), a third partition plate (53), a storage chamber (54), a first sliding groove (55), a second sliding groove (56) and a sliding block (57), the fixed frame (51) and the guide rail (7) of the trapezoid structure are in a rectangular structure and are in sliding connection, the fixed frame (51) corresponds to the baffle plates (13) one by one, the second partition plates (52) are vertically fixed in the fixed frame (51) in a group, the third partition plates (53) are vertically fixed between the two second partition plates (52) of each group, the second partition plates (52) are matched with the third partition plates (53) to enclose the fixed frame (51) into the storage chamber (54) for classifying and storing books with different sizes, the second sliding groove (56) for guiding is arranged at the bottom end of the fixed frame (51), the sliding block (57) which is of a rectangular structure and used for limiting the position of the bottom end of the second partition plate (52) is connected with the second sliding groove (56) in a sliding mode, and the first sliding groove (55) used for guiding and limiting the position of the top end of the fixed frame (51) is arranged;

the limiting structure (6) comprises a limiting spring (61), a limiting block (62) and limiting teeth (63), the limiting block (62) which is of a trapezoidal structure and used for limiting penetrates through the first sliding groove (55) and extends to the second partition plate (52), the limiting block (62) is connected with the second partition plate (52) in a sliding mode, the limiting spring (61) is arranged at one end, close to the second partition plate (52), of the limiting block (62), the limiting spring (61) is arranged inside the second partition plate (52), and the limiting teeth (63) which are of a triangular structure and used for being matched with the fixing frame (51) to limit are arranged at one end, close to the fixing frame (51), of the limiting block (62);

the driving structure (3) comprises an adjusting rod (31) and a sleeve (32), the sleeve (32) of the cylindrical structure is rotatably connected with the fixed frame (51), the adjusting rod (31) is fixed on the baffle (13), and the sleeve (32) is in threaded connection with the adjusting rod (31);

the second storage structure (4) comprises a fixed disc (41) and a plurality of limiting holes (42), the fixed disc (41) of the disc-shaped structure for driving the sleeve (32) is fixed at one end, away from the fixed frame (51), of the sleeve (32), and the fixed disc (41) is provided with a plurality of disc-shaped limiting holes (42) which are different in size and used for storing small articles in a classified manner;

the bookshelf is fixed on a desktop through the first storage structure (1) matched with the support plate (2), the support plate (2) is enabled to abut against a wall body, the size of a storage space inside the third storage structure (5) is adjusted through the control limiting structure (6), the driving structure (3) is adjusted, the third storage structure (5) slides inside the guide rail (7), the position of the third storage structure (5) on the guide rail (7) is adjusted, and books are stored inside the first storage structure (1) and the third storage structure (5) in a classified mode;

the supporting plate (2) is fixed on the side edge of the desktop through bolts, so that the supporting plate (2) is abutted against a wall body, books are stored in the accommodating chamber (12) in a classified mode, the supporting plate (2) is of a 7-shaped structure, and stability is improved;

the limiting block (62) is pressed, the limiting block (62) slides with the first sliding groove (55), the limiting block (62) slides with the second partition plate (52), the limiting spring (61) is driven to contract, the limiting teeth (63) do not abut against the fixed frame (51), the sliding second partition plate (52) changes the size of the storage chamber (54), the distance between the second partition plates (52) of each group is adjusted, and therefore the storage space of books is controlled, the second partition plates (52) are matched with the third partition plates (53) to enclose the fixed frame (51) into the storage chambers (54) which are different in size and used for storing the books in a classified mode, the books with different sizes are conveniently stored in a classified mode, the books with different sizes are stored and inquired more conveniently, the book storage efficiency and the book storage quality are improved, the second sliding groove (56) is matched with the sliding block (57) to facilitate limiting the second partition plate (52), the stability is improved, when the limiting block (62) is loosened, the limiting spring (61) extends to drive the limiting teeth (63) on the limiting block (62) to abut against the fixed frame (51) to limit the second partition plate (52), and the stability between the limiting block (62) and the fixed frame (51) is improved due to the arrangement of the limiting teeth (63);

the fixed plate (41) is held by hand to drive the sleeve (32) to rotate, the sleeve (32) is in threaded connection with the adjusting rod (31), the driving fixed frame (51) slides on the guide rail (7), then the position of the fixed frame (51) on the guide rail (7) is adjusted, so that the distance between the fixed frame (51) and the baffle (13) is adjusted, books are stored more conveniently, meanwhile, the space utilization efficiency is improved, the sleeve (32) is in threaded connection with the adjusting rod (31), the fixed frame (51) is convenient to limit, and the operation is more convenient;

the third is accomodate structure (5) and is cooperated limit structure's (6) use, be convenient for adjust the third and accomodate the size of the storage space of the inside of structure (5), be convenient for categorised different books of storage, make and seek, store books convenient and fast more, the one end of drive structure (3) is fixed in third and accomodates structure (5), the other end of drive structure (3) is fixed in first accomodate structure (1), be convenient for adjust drive structure (3), it slides on guide rail (7) to make third accomodate structure (5), adjust the position that structure (5) were accomodate to the third, it is more convenient to make and store books, space utilization efficiency has been improved greatly, the use of second accomodate structure (4) makes and adjusts drive structure (3) more convenient, the use of first accomodate structure (1) of cooperation is convenient for fixing bookshelf desktop on the bookshelf simultaneously, the stability of bookshelf has been improved.