A retractable bookend

Abstract

The utility model discloses a telescopic bookend, comprising a main body and a first telescopic upright plate, wherein a first connecting portion is provided at the bottom of the main body, and a first sliding portion is provided at the first telescopic upright plate, and the first connecting portion and the first sliding portion are slidably matched so that the first telescopic upright plate can be slidably and telescopically extended relative to the main body, and a first accommodating cavity with adjustable size is formed between the first telescopic upright plate and the main body by sliding, and further comprising a second telescopic upright plate, wherein a second sliding portion is provided at the bottom of the second telescopic upright plate, and the second sliding portion and the first sliding portion are slidably matched so that the second telescopic upright plate can be slidably and telescopically extended relative to the first telescopic upright plate, and a second accommodating cavity with adjustable size is formed between the second telescopic upright plate and the first telescopic upright plate by sliding, and in a storage state, the first telescopic upright plate and the second telescopic upright plate fit together and have a small size, and in a use state, the first telescopic upright plate and the second telescopic upright plate slide out to form two accommodating cavities, thereby increasing the capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery products, and more specifically to a telescopic bookend. Background Art

[0002] A book stand is a kind of stationery used to store books and prevent standing books from tilting. Common book stands are generally L-shaped and appear in pairs. The two book stands are not related to each other. When searching or taking books, one of the book stands is easily knocked over, which is inconvenient to use. Currently, most of them are made into an integrated book stand by fixing two upright plates on a bottom plate. Although the integrated book stand solves the above-mentioned problem, the integrated book stand has the problem that the storage area capacity is fixed and cannot be adjusted, and a lot of space is wasted in actual use.

[0003] In view of the above problems, for example, a utility model patent with publication number: CN218791232U discloses a bookend, a body, the body having at least one clamping gap with a fixed width; a first baffle, the first baffle is slidably connected to the body, and the inner side wall of the first baffle is combined with the outer side wall of the body to form a first clamping gap with adjustable width. In this scheme, the clamping gap with a fixed width on the body is used to store books, and the body can be used alone as a bookend. The first baffle is slidably matched with the body. When the inner side wall of the first baffle is against the outer side wall of the body, the whole formed by the two occupies less space, which is convenient for storage. When more books need to be placed, the first baffle is pulled open to move it away from the body, and the first clamping gap formed plays a role in expanding the book storage capacity. However, this scheme can only slide the first baffle to form a clamping gap, and the book storage capacity that can be expanded by a single clamping gap is extremely limited. On the other hand, in this scheme, a first elastic connector is provided between the body and the first baffle, wherein the first elastic connector is installed close to the outer side of the body, and there are problems such as tensile instability in actual use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a telescopic bookend, which has a first telescopic upright plate and a second telescopic upright plate. The first telescopic upright plate slides and telescopes relative to the main body to form a first accommodating cavity with an adjustable size. The second telescopic upright plate slides and telescopes relative to the first telescopic upright plate to form a second accommodating cavity with an adjustable size. In the storage state, the first telescopic upright plate is fitted with the second telescopic upright plate, and the storage size is small. In the use state, the first telescopic upright plate and the second telescopic upright plate can both slide out to form two accommodating cavities, thereby increasing the book storage capacity.

[0005] The utility model provides a telescopic bookend, comprising a main body and a first telescopic upright board, wherein a first connecting portion is provided at the bottom of the main body, and the first telescopic upright board is provided with a first sliding portion, and the first connecting portion and the first sliding portion are slidably matched so that the first telescopic upright board can be slidably and telescopically extended relative to the main body, and a first accommodating cavity with adjustable size is formed between the first telescopic upright board and the main body by sliding, and further comprising a second telescopic upright board, wherein a second sliding portion is provided at the bottom of the second telescopic upright board, and the second sliding portion and the first sliding portion are slidably matched so that the second telescopic upright board can be slidably and telescopically extended relative to the first telescopic upright board, and a second accommodating cavity with adjustable size is formed between the second telescopic upright board and the first telescopic upright board by sliding.

[0006] In the technical solution, a first telescopic vertical plate is provided on at least one side of a main body for sliding connection. The main body and the first telescopic vertical plate are slidably connected to the first sliding part through a first connecting part. A first accommodating cavity is formed between the first telescopic vertical plate and the main body. The first accommodating cavity is used to store books. The first telescopic vertical plate adjusts the size of the first accommodating cavity by sliding and retracting relative to the main body. When the first telescopic vertical plate slides out relative to the main body, the size of the first accommodating groove becomes larger, and the book stand can accommodate more books. When the first telescopic vertical plate slides back relative to the main body, the size of the first accommodating groove becomes smaller, and the book stand can accommodate fewer books. The user can control the size of the first accommodating groove according to the storage needs, which is convenient to use. By arranging the second telescopic vertical plate to be slidably connected to the first telescopic vertical plate through the second sliding part and the first sliding part Then, a second accommodating cavity is formed between the second telescopic upright plate and the first telescopic upright plate, and the second accommodating cavity is mainly used for storing books. The second telescopic upright plate adjusts the size of the second accommodating cavity by sliding and retracting relative to the first telescopic upright plate. The second accommodating cavity has the same principle as the first accommodating cavity. By adding the second telescopic upright plate, the second accommodating cavity is increased, so that the book storage capacity of the book stand is greatly increased; on the other hand, the second telescopic upright plate is directly slidably connected to the first telescopic upright plate, and the size adjustment of the first accommodating cavity and the second accommodating cavity are independent of each other. In the storage state, the second telescopic upright plate is fitted with the first telescopic upright plate, and the storage size is small, which reduces the transportation cost. In the use state, the second telescopic upright plate adds a second accommodating cavity, which increases the book storage capacity compared to the ordinary telescopic book stand and is more practical.

[0007] As an improvement, a first elastic member is provided between the first sliding portion and the first connecting portion, and the first elastic member keeps the first telescopic vertical plate and the main body in a tightened state; the first elastic member is located in the middle of the first connecting portion. In the technical solution, a first elastic member is arranged between the first sliding portion and the first connecting portion, and the side plate of the first telescopic vertical plate has a force to slide toward the side plate of the main body through the first elastic member, so that the first telescopic vertical plate and the main body are kept in a tightened state, and a first accommodating cavity is formed between the side plate of the first telescopic vertical plate and the side plate of the main body. When the book capacity exceeds the initial capacity of the first accommodating cavity, the first telescopic vertical plate is forced to slide away from the main body, so that the capacity of the first accommodating cavity becomes larger. At this time, the first elastic member is in a state of elastic deformation under force. After the extra books are placed in the first accommodating cavity with increased capacity, the first telescopic vertical plate is slid close to the main body under the restoring force of the first elastic member, and the side plate of the first telescopic vertical plate fits with the books so that the books in the first accommodating cavity are subjected to a clamping force and are stably placed; on the other hand, in the present solution, the first elastic member is arranged in the middle of the first connecting portion, and the first elastic member is subjected to more stable force during the stretching process, so that the telescopic force between the main body and the first telescopic vertical plate is more balanced, and the telescopic force is more stable.

[0008] As an improvement, a second elastic member is provided between the second sliding part and the first sliding part, and the second elastic member keeps the second telescopic vertical plate and the first telescopic vertical plate in a tightened state. In this technical solution, a second elastic member is provided between the second sliding part and the first sliding part, and the side plate of the second telescopic vertical plate has a force to slide toward the side plate of the first telescopic vertical plate through the second elastic member, so that the second telescopic vertical plate and the first telescopic vertical plate are kept in a tightened state, and a second accommodating cavity is formed between the side plate of the second telescopic vertical plate and the side plate of the first telescopic vertical plate. When it is necessary to place books in the second accommodating cavity, the user pulls the second telescopic vertical plate, so that the second telescopic vertical plate is forced to slide away from the first telescopic vertical plate, so that the capacity of the second accommodating cavity is sufficient to place the books. At this time, the second elastic member is in a state of elastic deformation under force. After the book is placed in the second accommodating cavity, the second telescopic vertical plate slides close to the first telescopic vertical plate under the resetting force of the second elastic member, and the side plate of the second telescopic vertical plate fits the book so that the book in the second accommodating cavity is clamped and can be stably placed, which is more reliable to use.

[0009] As an improvement, the second elastic member is located in the middle of the first sliding part; the second sliding part is provided with a first mounting column adapted to the second elastic member, the first sliding part is provided with a second mounting column adapted to the second elastic member, one end of the second elastic member is mounted on the first mounting column, and the other end of the second elastic member is mounted on the second mounting column. In this technical solution, the second elastic member is arranged in the middle of the first sliding part, so that the force on the second elastic member during the stretching process is more stable, so that the telescopic force between the first telescopic vertical plate and the second telescopic vertical plate is more balanced, and the telescopic movement is more stable; by arranging the first mounting column on the second sliding part and the second mounting column on the first sliding part, one end of the second elastic member is connected to the first mounting column and the other end is connected to the second mounting column to complete the installation, and the installation of the second elastic member is simple and reliable.

[0010] As an improvement, a first receiving groove for accommodating the second elastic member is provided in the middle of the second sliding part, the first mounting column is provided in the first receiving groove, and the second mounting column is provided on the end of the first sliding part away from the second telescopic vertical plate. In this technical solution, the second elastic member is located in the middle of the first sliding part. By providing the first receiving groove in the middle of the second sliding part, the second sliding part avoids the second elastic member through the first receiving groove, and the second elastic member is more stably stretched under force, and the telescopic force between the first telescopic vertical plate and the second telescopic vertical plate is more balanced. By providing the first mounting column in the first receiving groove and the second mounting column on the end of the first sliding part away from the second telescopic vertical plate, the second elastic member does not affect the overall length after installation, which is conducive to reducing the storage size and making the installation distribution more reasonable.

[0011] As an improvement, the side wall of the second sliding part is provided with a first convex strip, the first sliding part is provided with a first limiting plate, the first convex strip cooperates with the first limiting plate to limit the upper and lower limits of the second sliding part within the first sliding part, a first limiting groove for inserting the first convex strip is formed between the first limiting plate and the first sliding part, and the first convex strip is slidably connected with the first limiting groove. In this technical solution, the second sliding part and the first sliding part are slidably matched, the second sliding part is provided with a first convex strip, the first sliding part is provided with a first limiting plate, the second sliding part is installed in the first sliding part, and the first convex strip is abutted against the first limiting plate up and down to limit the second sliding part in the first sliding part, so as to prevent the second telescopic vertical plate from detaching from the first telescopic vertical plate due to gravity when the bottom of the bookend is suspended in the air, and the use is more reliable, a first limiting groove is formed between the first limiting plate and the first sliding part, and the first convex strip is slidably installed in the first limiting groove, the sliding is more reliable, and the sliding efficiency is higher.

[0012] As an improvement, the first convex strip is provided with an elastic hook adapted to the first limiting plate, and the elastic hook is provided with a guiding bevel and a limiting surface. The elastic hook abuts against the outer end of the first limiting plate through the guiding bevel to elastically deform and enter the second sliding part, and the elastic hook abuts against the inner end of the first limiting plate through the limiting surface to be limited in the second sliding part. In this technical solution, the second sliding part slides back and forth in the first sliding part to change the size of the second accommodating cavity. Considering that the second telescopic bookshelf is stretched too much and causes the second sliding part to slide out of the first sliding part, this solution provides an elastic hook on the first convex strip that can be buckled with the first limiting plate. A gap is provided between the elastic hook and the first convex strip, and the gap provides space for elastic deformation of the elastic hook. By providing a guiding bevel and a limiting surface on the elastic hook, when the second sliding part needs to be installed in the first sliding part, the elastic hook is The guide inclined surface abuts against the outer end of the first limit plate, and the outer end refers to the end away from the main body. The elastic hook is subjected to elastic deformation under force to avoid the first limit plate, so that the first convex strip can be slidably inserted into the first limit groove. When the elastic hook slides to disengage from the first limit plate, the second sliding part slides outward at this time, and the limiting surface of the elastic hook abuts against the inner end of the first limit plate, and the inner end refers to the end close to the main body. The elastic hook and the inner end of the first limit plate are locked and limited to prevent the second sliding part from sliding away from the first sliding part, thereby improving the reliability of use.

[0013] As an improvement, a bottom plate is installed at the bottom of the main body, and the bottom plate limits the upper and lower positions of the first sliding part. The first sliding part is a groove structure, and a first limiting protrusion adapted to the first sliding part is arranged on the bottom plate, and the first limiting protrusion abuts against the side wall of the first sliding part to limit the first sliding part in the first connecting part. In this technical solution, the first sliding part is installed in the first connecting part, and the first connecting part and the first sliding part are both located at the bottom. By installing the bottom plate at the bottom of the main body, the bottom plate covers the bottom of the main body, so that the upper and lower limits of the first sliding part are located in the first connecting part, and the first telescopic upright plate is prevented from being separated from the main body due to gravity when the bottom of the bookend is suspended in the air, and the use is more reliable. By setting the first sliding part as a groove structure and setting the first limiting protrusion on the bottom plate, the first limiting protrusion is inserted into the first sliding part, when the first sliding part is forced to slide outward along the first connecting part until the first limiting protrusion abuts against the side wall of the first sliding part, the maximum size of the first accommodating cavity is reached at this time, and the first limiting protrusion abuts against the first sliding part to limit the position, so as to prevent the first sliding part from sliding out of the first connecting part, and improve the reliability of use.

[0014] As an improvement, it also includes a third telescopic upright board, the third telescopic upright board and the first telescopic upright board are distributed left and right relative to the main board, the third telescopic upright board is provided with a third sliding part adapted to the first connecting part, the first connecting part and the third sliding part slide together so that the third telescopic upright board can slide and retract relative to the main body, and a third accommodating cavity with adjustable size is formed between the third telescopic upright board and the main body through sliding. In this technical solution, the first telescopic upright board is slidably installed on one side of the main board, and the third telescopic upright board is slidably installed on the other side of the main board, and the main body and the third telescopic upright board are slidably connected through the first connecting part and the third sliding part, and a third accommodating cavity is formed between the third telescopic upright board and the main body. The principle of the third accommodating cavity is the same as that of the first accommodating cavity, which will not be repeated; the first telescopic upright board and the second telescopic upright board are distributed left and right, so that accommodating cavities with adjustable size can be formed on both sides of the main body, which greatly increases the book storage capacity of the bookend.

[0015] As an improvement, the side wall of the first sliding part is provided with a third mounting column adapted to the first elastic part, one end of the first elastic part is mounted on the third mounting column, the side wall of the third sliding part is provided with a fourth mounting column adapted to the first elastic part, and the other end of the first elastic part is mounted on the fourth mounting column. In this technical solution, the first elastic part is installed in the middle of the first connecting part, and the first sliding part and the third sliding part are both slidably installed on the first connecting part. By providing the third mounting column on the side wall of the first sliding part close to the third sliding part, and providing the fourth mounting column on the side wall of the third sliding part close to the first sliding part, one end of the first elastic part is connected to the third mounting column and the other end is connected to the fourth mounting column, so that the installation is completed. The installation of the first elastic part is simple and reliable, and the first elastic part makes the first telescopic vertical plate and the third telescopic vertical plate both maintain a tightened state with the main body, with a compact structure and a smaller overall volume.

[0016] As an improvement, it also includes a fourth telescopic upright board, the bottom of the fourth telescopic upright board is provided with a fourth sliding part, the fourth sliding part and the third sliding part slide together so that the fourth telescopic upright board can slide and retract relative to the third telescopic upright board, and the fourth telescopic upright board and the third telescopic upright board form a fourth accommodating cavity with adjustable size by sliding. In this technical solution, by setting the fourth telescopic upright board and the third telescopic upright board to be slidably connected through the fourth sliding part and the third sliding part, a fourth accommodating cavity is formed between the fourth telescopic upright board and the third telescopic upright board, and the fourth accommodating cavity is the same as the second accommodating cavity in principle, and no further description is given. By adding the fourth telescopic upright board, the fourth accommodating cavity is increased, so that the book storage capacity of the book stand is greatly increased; on the other hand, the fourth telescopic upright board is directly slidably connected with the third telescopic upright board, and the size adjustment of the third accommodating cavity and the fourth accommodating cavity is independent of each other. In the storage state, the fourth telescopic upright board fits the third telescopic upright board, and the storage size is small, which reduces the transportation cost. In the use state, the fourth telescopic upright board adds a fourth accommodating cavity, which increases the book storage capacity compared with the ordinary telescopic book stand, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention discloses a three-dimensional structure schematic diagram of a retractable bookend.

[0018] Figure 2 The present invention is a partial structural schematic diagram of a retractable book stand in an upward viewing direction.

[0019] Figure 3 It is a schematic diagram of the connection structure of the first telescopic vertical plate and the second telescopic vertical plate in the present disclosure.

[0020] Figure 4 For this disclosure Figure 3 A local enlarged schematic diagram of point A in the middle.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the second telescopic vertical plate in the present disclosure.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the first telescopic vertical plate in the present disclosure.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the bottom plate in the present disclosure.

[0024] As shown in the figure: 1. main body; 11. first connecting part; 12. bottom plate; 121. first limiting protrusion; 2. first telescopic vertical plate; 21. first sliding part; 211. second mounting column; 212. first limiting plate; 213. first limiting groove; 214. third mounting column; 3. second telescopic vertical plate; 31. second sliding part; 311. first mounting column; 312. first accommodating groove; 313. first convex strip; 314. elastic hook; 3141. guiding inclined surface; 3142. limiting surface; 4. first elastic member; 5. second elastic member; 6. third telescopic vertical plate; 61. third sliding part; 611. fourth mounting column; 7. fourth telescopic vertical plate; 71. fourth sliding part. DETAILED DESCRIPTION

[0025] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0026] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0027] It should also be understood that the terms “comprises,” “including,” “has,” “contains,” and “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0028] Example 1

[0029] like Figures 1 to 7As shown, the present application discloses a telescopic bookend, including a main body 1 and a first telescopic upright board 2, a first connecting portion 11 is provided at the bottom of the main body 1, and the first telescopic upright board 2 is provided with a first sliding portion 21, the first connecting portion 11 and the first sliding portion 21 are slidably matched so that the first telescopic upright board 2 can be slidably extended and retracted relative to the main body 1, and a first accommodating cavity with adjustable size is formed between the first telescopic upright board 2 and the main body 1 by sliding, and the first telescopic upright board 2 is slidably connected to at least one side of the main body 1, and the main body 1 and the first telescopic upright board 2 are slidably connected through the first connecting portion 11 and the first sliding portion 21 A first accommodating cavity is formed between the first telescopic upright plate 2 and the main body 1, and the first accommodating cavity is used to store books. The first telescopic upright plate 2 adjusts the size of the first accommodating cavity by sliding and retracting relative to the main body 1. When the first telescopic upright plate 2 slides out relative to the main body 1, the size of the first accommodating groove 312 becomes larger, and the book stand can accommodate more books. When the first telescopic upright plate 2 slides back relative to the main body 1, the size of the first accommodating groove 312 becomes smaller, and the book stand can accommodate fewer books. The user can control the size of the first accommodating groove 312 according to the storage needs, which is convenient to use;

[0030] The second telescopic upright plate 3 is also included. The second telescopic upright plate 3 is provided with a second sliding portion 31 at the bottom. The first telescopic upright plate 2 is provided with a first sliding portion 21. The first sliding portion 21 and the second sliding portion 31 are slidably matched so that the second telescopic upright plate 3 can slide and retract relative to the first telescopic upright plate 2. A second accommodating cavity with adjustable size is formed between the second telescopic upright plate 3 and the first telescopic upright plate 2 by sliding. The second telescopic upright plate 3 is slidably connected to the first telescopic upright plate 2 through the first sliding portion 21 and the second sliding portion 31. A second accommodating cavity is formed between the second telescopic upright plate 3 and the first telescopic upright plate 2. The second accommodating cavity is mainly used for storing books. The second telescopic upright plate 3 is connected to the first telescopic upright plate 2 through the first sliding portion 21 and the second sliding portion 31. The size of the second accommodating cavity is adjusted by sliding and retracting relative to the first telescopic upright plate 2. The second accommodating cavity has the same principle as the first accommodating cavity. The second telescopic upright plate 3 is added to increase the second accommodating cavity, so that the book storage capacity of the book stand is greatly increased. On the other hand, the second telescopic upright plate 3 is directly slidably connected to the first telescopic upright plate 2, and the size adjustment of the first accommodating cavity and the second accommodating cavity are independent of each other. In the storage state, the second telescopic upright plate 3 fits the first telescopic upright plate 2, and the storage size is small, which reduces the transportation cost. In the use state, the second telescopic upright plate 3 adds a second accommodating cavity, which increases the book storage capacity compared to the ordinary telescopic book stand and is more practical.

[0031] More specifically, Figure 1 and Figure 2As shown, a first elastic member 4 is provided between the first sliding portion 21 and the first connecting portion 11, and the first elastic member 4 keeps the first telescopic vertical plate 2 and the main body 1 in a tightened state. The first elastic member 4 is provided between the first sliding portion 21 and the first connecting portion 11, and the side plate of the first telescopic vertical plate 2 has a force to slide toward the side plate of the main body 1 through the first elastic member 4, so that the first telescopic vertical plate 2 and the main body 1 are kept in a tightened state, and a first accommodating cavity is formed between the side plate of the first telescopic vertical plate 2 and the side plate of the main body 1. When the book capacity exceeds the initial capacity of the first accommodating cavity, the first telescopic vertical plate 2 is forced to slide away from the main body 1, so that the capacity of the first accommodating cavity becomes larger. At this time, the first elastic member 4 is in a state of elastic deformation under stress. After the extra books are placed in the first accommodating cavity with increased capacity, the first telescopic vertical plate 2 slides close to the main body 1 under the restoring force of the first elastic member 4, and the side plate of the first telescopic vertical plate 2 fits with the books so that the books in the first accommodating cavity are clamped and stably placed; the first elastic member 4 is located in the middle of the first connecting portion 11. The first elastic member 4 is arranged in the middle of the first connecting portion 11, and the first elastic member 4 is subjected to more stable stress during the stretching process, so that the telescopic force between the main body 1 and the first telescopic vertical plate 2 is more balanced, and the telescopic force is more stable; in this embodiment, the first elastic member 4 is a spring.

[0032] More specifically, Figures 1 to 3 As shown, a second elastic member 5 is provided between the second sliding portion 31 and the first sliding portion 21, and the second elastic member 5 keeps the second telescopic vertical plate 3 and the first telescopic vertical plate 2 in a tightened state. A second elastic member 5 is provided between the second sliding portion 31 and the first sliding portion 21, and the side plate of the second telescopic vertical plate 3 has a force to slide toward the side plate of the first telescopic vertical plate 2 through the second elastic member 5, so that the second telescopic vertical plate 3 and the first telescopic vertical plate 2 are kept in a tightened state, and a second accommodating cavity is formed between the side plate of the second telescopic vertical plate 3 and the side plate of the first telescopic vertical plate 2. When a book needs to be placed When the book is in the second accommodating cavity, the user pulls the second telescopic upright plate 3, so that the second telescopic upright plate 3 is forced to slide away from the first telescopic upright plate 2, so that the capacity of the second accommodating cavity is sufficient to accommodate the book. At this time, the second elastic member 5 is in a state of elastic deformation under force. After the book is placed in the second accommodating cavity, the second telescopic upright plate 3 slides close to the first telescopic upright plate 2 due to the restoring force of the second elastic member 5. The side plate of the second telescopic upright plate 3 fits with the book so that the book in the second accommodating cavity is clamped and can be stably placed, which is more reliable to use. In this embodiment, the second elastic member 5 is a spring.

[0033] More specifically, Figure 3 , Figure 5 and Figure 6As shown, the second elastic member 5 is located in the middle of the first sliding portion 21. The second elastic member 5 is arranged in the middle of the first sliding portion 21, so that the second elastic member 5 is subjected to more stable force during the stretching process, so that the telescopic force between the first telescopic vertical plate 2 and the second telescopic vertical plate 3 is more balanced, and the telescopic force is more stable; the second sliding portion 31 is provided with a first mounting column 311 adapted to the second elastic member 5, and the first sliding portion 21 is provided with a second mounting column 211 adapted to the second elastic member 5, one end of the second elastic member 5 is mounted on the first mounting column 311, and the other end of the second elastic member 5 is mounted on the second mounting column 211. By arranging the first mounting column 311 on the second sliding portion 31 and the second mounting column 211 on the first sliding portion 21, one end of the second elastic member 5 is connected to the first mounting column 311, and the other end is connected to the second mounting column 211 to complete the installation, and the installation of the second elastic member 5 is simple and reliable.

[0034] More specifically, Figure 3 , Figure 5 and Figure 6 As shown, a first receiving groove 312 for accommodating the second elastic member 5 is provided in the middle of the second sliding portion 31, a first mounting column 311 is provided in the first receiving groove 312, a second mounting column 211 is provided on the end of the first sliding portion 21 away from the second telescopic vertical plate 3, and the second elastic member 5 is located in the middle of the first sliding portion 21. By providing the first receiving groove 312 in the middle of the second sliding portion 31, the second sliding portion 31 avoids the second elastic member 5 through the first receiving groove 312, and the second elastic member 5 is more stably stretched under force, and the telescopic force between the first telescopic vertical plate 2 and the second telescopic vertical plate 3 is more balanced. By arranging the first mounting column 311 in the first receiving groove 312 and the second mounting column 211 on the end of the first sliding portion 21 away from the second telescopic vertical plate 3, the second elastic member 5 does not affect the overall length after installation, which is conducive to reducing the storage size and making the installation distribution more reasonable.

[0035] More specifically, Figures 3 to 6As shown, the side wall of the second sliding part 31 is provided with a first convex strip 313, and the first sliding part 21 is provided with a first limiting plate 212. The first convex strip 313 cooperates with the first limiting plate 212 to limit the upper and lower limits of the second sliding part 31 in the first sliding part 21. A first limiting groove 213 for inserting the first convex strip 313 is formed between the first limiting plate 212 and the first sliding part 21. The first convex strip 313 is slidably connected with the first limiting groove 213. The second sliding part 31 is slidably matched with the first sliding part 21. The second sliding part 31 is provided with the first convex strip 313 and the first limiting groove 213. A first limiting plate 212 is provided on a sliding portion 21, and the second sliding portion 31 is installed in the first sliding portion 21. The first convex strip 313 abuts against the first limiting plate 212 up and down, so that the second sliding portion 31 is limited in the first sliding portion 21, so as to prevent the second telescopic vertical plate 3 from being separated from the first telescopic vertical plate 2 due to gravity when the bottom of the bookend is suspended in the air, and the use is more reliable. A first limiting groove 213 is formed between the first limiting plate 212 and the first sliding portion 21, and the first convex strip 313 is slidably installed in the first limiting groove 213, so that the sliding is more reliable and the sliding efficiency is higher.

[0036] More specifically, Figures 3 to 6 As shown, the first convex strip 313 is provided with an elastic hook 314 adapted to the first limiting plate 212, and the elastic hook 314 is provided with a guiding inclined surface 3141 and a limiting surface 3142. The elastic hook 314 abuts against the outer end of the first limiting plate 212 through the guiding inclined surface 3141 to elastically deform and enter the second sliding portion 31, and the elastic hook 314 abuts against the inner end of the first limiting plate 212 through the limiting surface 3142 to be limited in the second sliding portion 31, and the second sliding portion 31 slides back and forth in the first sliding portion 21 to change the size of the second accommodating cavity. Considering that the second telescopic bookend is stretched too much and causes the second sliding portion 31 to slide out of the first sliding portion 21, this solution provides an elastic hook 314 that can be buckled with the first limiting plate 212 on the first convex strip 313, and a gap is provided between the elastic hook 314 and the first convex strip 313, and the gap provides elastic deformation for the elastic hook 314 When the second sliding part 31 needs to be installed in the first sliding part 21, the guiding inclined surface 3141 and the limiting surface 3142 of the elastic hook 314 are arranged on the elastic hook 314, and the outer end of the first limiting plate 212 refers to the end away from the main body 1. The elastic hook 314 is elastically deformed under the force to avoid the first limiting plate 212, so that the first convex bar 313 can be slidably inserted into the first limiting groove 213. When the elastic hook 314 slides to disengage from the first limiting plate 212, the second sliding part 31 slides outward, and the limiting surface 3142 of the elastic hook 314 abuts against the inner end of the first limiting plate 212, and the inner end refers to the end close to the main body 1. The elastic hook 314 and the inner end of the first limiting plate 212 are locked and limited to prevent the second sliding part 31 from sliding off the first sliding part 21, thereby improving the reliability of use.

[0037] More specifically, Figure 2 , Figure 6 and Figure 7 As shown, a bottom plate 12 is installed at the bottom of the main body 1, and the bottom plate 12 limits the upper and lower positions of the first sliding part 21. The first sliding part 21 is a groove structure, and a first limiting protrusion 121 adapted to the first sliding part 21 is provided on the bottom plate 12. The first limiting protrusion 121 abuts against the side wall of the first sliding part 21 to limit the first sliding part 21 in the first connecting part 11. The first sliding part 21 is installed in the first connecting part 11. The first connecting part 11 and the first sliding part 21 are both located at the bottom. By installing the bottom plate 12 at the bottom of the main body 1, the bottom plate 12 covers the bottom of the main body 1, so that the upper and lower limits of the first sliding part 21 are located in the first connecting part 1 1, to prevent the first telescopic upright plate 2 from being separated from the main body 1 due to gravity when the bottom of the bookend is suspended in the air, the use is more reliable, by setting the first sliding part 21 as a groove structure, and setting the first limiting protrusion 121 on the bottom plate 12, the first limiting protrusion 121 is inserted into the first sliding part 21, when the first sliding part 21 is forced to slide outward along the first connecting part 11 until the first limiting protrusion 121 abuts against the side wall of the first sliding part 21, this is the maximum size of the first accommodating cavity, the first limiting protrusion 121 abuts against the first sliding part 21 to limit, to prevent the first sliding part 21 from sliding off the first connecting part 11, thereby improving the reliability of use.

[0038] Example 2

[0039] like Figures 1 to 7 As shown, this embodiment provides a telescopic bookend based on the embodiment 1. The bookend structure is the same as the embodiment 1, wherein it also includes a third telescopic upright plate 6. The third telescopic upright plate 6 and the first telescopic upright plate 2 are distributed left and right relative to the main board. The third telescopic upright plate 6 is provided with a third sliding portion 61 adapted to the first connecting portion 11. The first connecting portion 11 and the third sliding portion 61 are slidably matched so that the third telescopic upright plate 6 can be slidably retracted relative to the main body 1. A third accommodating cavity with adjustable size is formed between the third telescopic upright plate 6 and the main body 1 by sliding. The first telescopic upright plate 2 is slidably installed on one side of the main board, and the third telescopic upright plate 6 is slidably installed on the other side of the main board. The main body 1 and the third telescopic upright plate 6 are slidably connected through the first connecting portion 11 and the third sliding portion 61. A third accommodating cavity is formed between the third telescopic upright plate 6 and the main body 1. The principle of the third accommodating cavity is the same as that of the first accommodating cavity, which will not be repeated; the first telescopic upright plate 2 and the second telescopic upright plate 3 are distributed left and right, so that accommodating cavities with adjustable sizes can be formed on both sides of the main body 1, which greatly increases the book storage capacity of the bookend.

[0040] More specifically, Figure 2As shown, the side wall of the first sliding part 21 is provided with a third mounting column 214 adapted to the first elastic member 4, one end of the first elastic member 4 is mounted on the third mounting column 214, the side wall of the third sliding part 61 is provided with a fourth mounting column 611 adapted to the first elastic member 4, the other end of the first elastic member 4 is mounted on the fourth mounting column 611, the first elastic member 4 is mounted on the middle part of the first connecting part 11, the first sliding part 21 and the third sliding part 61 are both slidably mounted on the first connecting part 11, by arranging the third mounting column 214 on the side wall of the first sliding part 21 close to the third sliding part 61, and arranging the fourth mounting column 611 on the side wall of the third sliding part 61 close to the first sliding part 21, one end of the first elastic member 4 is connected to the third mounting column 214, and the other end is connected to the fourth mounting column 61, so that the installation is completed, the installation of the first elastic member 4 is simple and reliable, and the first elastic member 4 makes the first telescopic vertical plate 2 and the third telescopic vertical plate 6 both keep in a tightened state with the main body 1, the structure is compact, and the overall volume is smaller.

[0041] More specifically, Figure 2 As shown, it also includes a fourth telescopic vertical plate 7, a fourth sliding portion 71 is provided at the bottom of the fourth telescopic vertical plate 7, and the third telescopic vertical plate 6 is provided with a third sliding portion 61. The fourth sliding portion 71 and the third sliding portion 61 are slidably matched so that the fourth telescopic vertical plate 7 can slide and retract relative to the third telescopic vertical plate 6, and a fourth accommodating cavity with adjustable size is formed between the fourth telescopic vertical plate 7 and the third telescopic vertical plate 6 by sliding. By setting the fourth telescopic vertical plate 7 and the third telescopic vertical plate 6 to be slidably connected through the fourth sliding portion 71 and the third sliding portion 61, a fourth accommodating cavity is formed between the fourth telescopic vertical plate 7 and the third telescopic vertical plate 6. The fourth accommodating cavity has the same principle as the second accommodating cavity, which will not be described in detail. By adding the fourth telescopic vertical plate 7, the fourth accommodating cavity is increased, so that the book storage capacity of the book stand is greatly increased; on the other hand, the fourth telescopic vertical plate 7 is directly slidably connected to the third telescopic vertical plate 6, and the size adjustment of the third accommodating cavity and the fourth accommodating cavity is independent of each other. In the storage state, the fourth telescopic vertical plate 7 is in contact with the third telescopic vertical plate 6, and the storage size is small, which reduces the transportation cost. In the use state, the fourth telescopic vertical plate 7 adds a fourth accommodating cavity, which increases the book storage capacity compared with the ordinary telescopic book stand, and is more practical.

[0042] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A telescopic bookend, comprising a main body (1) and a first telescopic upright board (2), wherein a first connecting portion (11) is provided at the bottom of the main body (1), and the first telescopic upright board (2) is provided with a first sliding portion (21), wherein the first connecting portion (11) and the first sliding portion (21) are slidably matched so that the first telescopic upright board (2) can slide and retract relative to the main body (1), and a first accommodating cavity with adjustable size is formed between the first telescopic upright board (2) and the main body (1) by sliding, characterized in that: The invention also comprises a second telescopic upright plate (3), wherein a second sliding portion (31) is provided at the bottom of the second telescopic upright plate (3), wherein the second sliding portion (31) and the first sliding portion (21) are slidably matched so that the second telescopic upright plate (3) can be slidably extended and retracted relative to the first telescopic upright plate (2), and a second accommodating cavity with adjustable size is formed between the second telescopic upright plate (3) and the first telescopic upright plate (2) by sliding.

2. A retractable bookend according to claim 1, characterized in that: A first elastic member (4) is provided between the first sliding portion (21) and the first connecting portion (11), and the first elastic member (4) keeps the first telescopic vertical plate (2) and the main body (1) in a tightened state; the first elastic member (4) is located in the middle of the first connecting portion (11).

3. The retractable bookend according to claim 1, characterized in that: A second elastic member (5) is provided between the second sliding portion (31) and the first sliding portion (21), and the second elastic member (5) keeps the second telescopic vertical plate (3) and the first telescopic vertical plate (2) in a tightened state.

4. A retractable bookend according to claim 3, characterized in that: The second elastic member (5) is located in the middle of the first sliding portion (21); the second sliding portion (31) is provided with a first mounting column (311) adapted to the second elastic member (5); the first sliding portion (21) is provided with a second mounting column (211) adapted to the second elastic member (5); one end of the second elastic member (5) is mounted on the first mounting column (311), and the other end of the second elastic member (5) is mounted on the second mounting column (211).

5. The retractable bookend according to claim 4, characterized in that: A first receiving groove (312) for receiving the second elastic member (5) is provided in the middle of the second sliding portion (31), the first mounting column (311) is arranged in the first receiving groove (312), and the second mounting column (211) is arranged on the end of the first sliding portion (21) away from the second telescopic vertical plate (3).

6. The retractable bookend according to claim 1, characterized in that: The side wall of the second sliding part (31) is provided with a first convex strip (313), and the first sliding part (21) is provided with a first limiting plate (212). The first convex strip (313) cooperates with the first limiting plate (212) to limit the upper and lower limits of the second sliding part (31) within the first sliding part (21). A first limiting groove (213) for inserting the first convex strip (313) is formed between the first limiting plate (212) and the first sliding part (21), and the first convex strip (313) is slidably connected to the first limiting groove (213).

7. The retractable bookend according to claim 6, characterized in that: The first convex strip (313) is provided with an elastic hook (314) adapted to the first limiting plate (212); the elastic hook (314) is provided with a guiding inclined surface (3141) and a limiting surface (3142); the elastic hook (314) abuts against the outer end of the first limiting plate (212) through the guiding inclined surface (3141) to elastically deform and enter into the second sliding portion (31); the elastic hook (314) abuts against the inner end of the first limiting plate (212) through the limiting surface (3142) to be limited in the second sliding portion (31).

8. The retractable bookend according to claim 1, characterized in that: A bottom plate (12) is installed at the bottom of the main body (1), and the bottom plate (12) limits the upper and lower positions of the first sliding part (21); the first sliding part (21) is in a groove structure; a first limiting protrusion (121) adapted to the first sliding part (21) is arranged on the bottom plate (12); the first limiting protrusion (121) abuts against a side wall of the first sliding part (21) to limit the first sliding part (21) within the first connecting part (11).

9. The retractable bookend according to claim 1, characterized in that: The invention also comprises a third telescopic upright plate (6), wherein the third telescopic upright plate (6) and the first telescopic upright plate (2) are distributed on the left and right sides relative to the main plate, and the third telescopic upright plate (6) is provided with a third sliding portion (61) adapted to the first connecting portion (11), and the first connecting portion (11) and the third sliding portion (61) are slidably matched so that the third telescopic upright plate (6) can be slidably extended and retracted relative to the main body (1), and a third accommodating cavity with adjustable size is formed between the third telescopic upright plate (6) and the main body (1) by sliding.

10. The retractable bookend according to claim 9, characterized in that: The side wall of the first sliding portion (21) is provided with a third mounting column (214) adapted to the first elastic member (4), and one end of the first elastic member (4) is mounted on the third mounting column (214); the side wall of the third sliding portion (61) is provided with a fourth mounting column (611) adapted to the first elastic member (4), and the other end of the first elastic member (4) is mounted on the fourth mounting column (611).

11. The retractable bookend according to claim 9, characterized in that: The invention also comprises a fourth telescopic vertical plate (7), wherein a fourth sliding portion (71) is provided at the bottom of the fourth telescopic vertical plate (7), wherein the fourth sliding portion (71) is slidably matched with the third sliding portion (61) so that the fourth telescopic vertical plate (7) can be slidably extended and retracted relative to the third telescopic vertical plate (6), and a fourth accommodating cavity with adjustable size is formed between the fourth telescopic vertical plate (7) and the third telescopic vertical plate (6) by sliding.

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