Panoramic three-dimensional book convenient to support exhibition and read
Technical Field
The utility model relates to a children's reading or children's toy book structural design technical field especially relates to a three-dimensional book of panorama convenient to support exhibition and reading use.
Background
The three-dimensional book has good presentation effect, is easy to enlighten the brain of a child user, and is deeply popular with parents, kindergartens and libraries. The users of stereoscopic books, whether they are used at home or in kindergartens or libraries, are more often used by children, but children have a weak awareness of protecting books during use. However, in the existing three-dimensional book, the spacing between the pages can only be limited by the panoramic three-dimensional part, and the presentation of the panoramic three-dimensional part is realized by tensioning the pages. In the page turning process of a child user, the panoramic three-dimensional part is easily torn due to excessive force, and the service life of the whole book is influenced.
Further, in the prior art, a part of the three-dimensional book is suitable for users to display and read in a three-dimensional state (when the part of the structure is suitable for adopting the three-dimensional state of the book, the structure is in an upright state). However, during exhibition or reading appreciation, especially in library exhibition, it is necessary to stand the book up for more convenient use. However, the three-dimensional book in the prior art can only be supported by the book roots, so that the support stability is poor, the book is easy to topple and break, and the service life of the three-dimensional book is influenced.
Therefore, the three-dimensional book in the prior art is inconvenient to support and stand, is easy to break and influences the service life of the three-dimensional book; and the opening position of the pages can not be limited, so that the pages are easily torn due to excessive page turning force, and the service life of the three-dimensional book is influenced.
SUMMERY OF THE UTILITY MODEL
In view of the above, the main object of the present invention is to provide a device that can ensure the service life of a panoramic three-dimensional component; realize the stable three-dimensional exhibition of book body and read the panorama three-dimensional book of using of being convenient for support exhibition and reading.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a panoramic stereo book for facilitating supporting exhibitions and reading, comprising: the book comprises a book body and a book cover, wherein the book body comprises at least two pages of book page bodies, and all the book page bodies are hinged through hinge shafts; and a limiting device is arranged at the hinge shaft of each adjacent page body, so that the adjacent page bodies can rotate to turn pages within the limited range of the limiting device.
In a preferred embodiment, the page bodies are connected with the hinge shafts through hinge sleeves integrally formed at the side parts of the page bodies, at least two hinge sleeves of each page of the page bodies are arranged, and the limiting device is arranged between the hinge sleeves between the adjacent page bodies.
In a preferred embodiment, the position limiting means comprises: first locating part and second locating part, first locating part includes spacing pit and the spacing arch of adjacent hinge cover department setting, the contact surface department at adjacent hinge cover is established respectively to spacing pit and spacing arch be provided with two at least on the rotatory circular arc of page body spacing pit.
In a preferred embodiment, the second position-limiting member includes a guide groove and a guide rod, which are disposed at adjacent hinge sleeves, the guide groove is arc-shaped, the maximum arc angle is the maximum expansion angle of the adjacent page body, the guide groove and the guide rod are respectively disposed at the contact surface of the adjacent hinge sleeves, so that one end of the guide rod is fixedly connected with the end of the hinge sleeve, and the other end of the guide rod extends into the guide groove disposed at the adjacent hinge sleeve, thereby limiting the rotation angle of the adjacent page body.
In a preferred embodiment, the front and/or back of the book body is provided with support means.
In a preferred embodiment, the support device comprises: the hinge comprises a hinge groove, a hinge plate, an extension plate and a covering cloth; the book comprises a book body, a hinge plate, an extension plate and a telescopic cavity, wherein the front side and/or the back side of the book body are/is provided with a hinge groove, the hinge plate is limited and hinged in the hinge groove, the lower side of the hinge plate is provided with the telescopic cavity, and the extension plate is connected in the telescopic cavity in a sliding manner; and one side of the hinge groove far away from the book body is fixedly connected with a covering cloth.
In a preferred embodiment, the page body comprises a plurality of pages, each page body is provided with two hinge sleeves, and two adjacent pages of the page body are respectively: the hinge sleeve lower extreme of the upside of preceding page is seted up spacing pit, and the hinge sleeve upper end of the upside of succeeding page is equipped with spacing arch, the hinge sleeve lower extreme of the downside of preceding page is seted up the guide slot, the hinge sleeve upper end of the downside of succeeding page is equipped with the guide arm.
In a preferred embodiment, three limiting pits are provided, so that the adjacent page bodies are in a closed state, a semi-closed state and a fully opened state respectively.
In a preferred embodiment, at least two limiting holes are formed in one side, away from the book body, of the telescopic cavity, and a pushing elastic buckle is arranged on one side, away from the book body, of the extension plate, so that the pushing elastic buckle is respectively matched with the limiting holes to limit the relative position of the extension plate and the telescopic cavity.
In a preferred embodiment, the push buckle comprises: the elastic pushing device comprises an elastic pushing cavity, a compression spring, a sliding plate and a limiting buckle, wherein the elastic pushing cavity, the compression spring, the sliding plate and the limiting buckle are arranged on the surface of an elongated plate, the limiting buckle is fixedly connected with the sliding plate, the sliding plate and the limiting buckle are arranged in the elastic pushing cavity, and the compression spring is arranged between the lower side of the sliding plate and the bottom of the elastic pushing cavity; the upper end part of the limiting buckle is matched with the limiting hole in structure size.
In a preferred embodiment, two limiting members are provided between the hinge plates and the hinge grooves, so that the hinge plates are in an open state to support the book body or the hinge plates are in the hinge grooves.
In a preferred embodiment, a shielding cloth is arranged between adjacent page bodies, the surface of the shielding cloth and the surface of the book body are integrally formed, and the shielding cloth is arranged at the position, close to the hinge sleeve, of the page body.
In a preferred embodiment, the book body further comprises: preceding strip of paper used for sealing and back strip of paper used for sealing, preceding strip of paper used for sealing, back strip of paper used for sealing with the articulated shaft is articulated, just preceding strip of paper used for sealing, back strip of paper used for sealing with articulated shaft articulated mode with the page body with articulated mode between the articulated shaft is the same.
In a preferred embodiment, a protective sleeve in a ring structure is fixedly connected to the edge of one side of the front cover close to the book body, a plurality of permanent magnets are embedded in the protective sleeve, and a plurality of permanent magnets are adapted to be arranged on the edge of the rear cover; the front cover and the back cover are connected through the suction force of the permanent magnet.
In a preferred embodiment, the book corners of the front cover and the back cover are arc-shaped, and the joints of the front cover, the back cover and the spine are arc-shaped; the protective sheath is established circular-arc edge, the circular arc edge of protective sheath and preceding strip of paper used for sealing, back strip of paper used for sealing is flexible buffer material.
In a preferred embodiment, the upper end and the lower end of the page body are both arc-shaped, and the arc-shaped structure of the page body is matched with the structure size of the inner cavity of the protective sleeve.
The utility model discloses a be convenient for support exhibition and read the three-dimensional book of panorama of using has following beneficial effect:
the panoramic three-dimensional book convenient for supporting exhibition and reading comprises a book body and a book cover, wherein the book body comprises at least two pages of page bodies, the page bodies are connected with a hinge shaft through hinge sleeves integrally formed on the side parts of the page bodies, at least two hinge sleeves of each page body are arranged, and a limiting device is arranged between the hinge sleeves between the adjacent page bodies; the front and/or back of the book body is provided with a support device. The problem that in the prior art, the opening and closing angle of a panoramic three-dimensional book cannot be limited by other parts, tensioning and limiting are completely realized through the panoramic three-dimensional part, the damage of the panoramic three-dimensional part is easily caused, and the imaging effect is seriously reduced and the use is influenced due to different opening and closing limiting forces of the panoramic three-dimensional part along with the increase of the use time is solved; and current three-dimensional book can only realize the supporting role to the books body through the book root, and the support dynamics is not enough, takes place the books easily and emptys, damages the books body, and inconvenient support exhibition and support are read and are used. The panoramic three-dimensional book convenient for supporting exhibition and reading can stably limit the opening and closing angle of the page body, completely replace the limiting function of the panoramic three-dimensional component and ensure the service life of the panoramic three-dimensional component; furthermore, the supporting device can completely realize the supporting function on the book body, and the certificate body can be stably displayed and read.
Drawings
FIG. 1 is a schematic view of a panoramic stereo book for supporting display and reading use according to one embodiment of the present disclosure;
FIG. 2 is a schematic view of a panoramic stereo book for supporting exhibitions and reading according to another embodiment of the present disclosure, without a cover;
FIG. 3 is a schematic view of a panoramic stereo book with a cover cloth for supporting exhibitions and reading according to one embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a configuration of a connection between book covers of a panoramic stereo book for easy support for display and reading according to one embodiment of the present disclosure;
FIG. 5 is a schematic view of a connection between page bodies of a panoramic stereo book for supporting display and reading according to one embodiment of the present disclosure;
FIG. 6 is an enlarged partial view at A of the panoramic stereo book of FIG. 5 for easy supporting for display and reading use according to one embodiment of the present disclosure;
FIG. 7 is an enlarged partial view of FIG. 5 at B in a panoramic stereo book for easy supporting for display and reading use according to one embodiment of the present disclosure;
FIG. 8 is a front page schematic view of a page body of a panoramic stereo book for supporting display and reading according to one embodiment of the present disclosure;
FIG. 9 is a rear page view of the page body of the panoramic stereo book for easy support for display and reading according to one embodiment of the present disclosure;
FIG. 10 is a schematic structural view of a front or back support device of a book body for facilitating support of a panoramic stereo book for display and reading use according to one embodiment of the present disclosure;
FIG. 11 is a schematic view of the support device of FIG. 10 deployed to facilitate supporting a panoramic stereo book for display and reading use according to one embodiment of the present disclosure;
FIG. 12 is a partial cross-sectional view of the support assembly of FIG. 11 facilitating supporting of a panoramic stereo book for display and reading use according to one embodiment of the present disclosure;
FIG. 13 is an enlarged partial view of FIG. 12 at C of a panoramic stereo book for easy supporting display and reading use according to one embodiment of the present disclosure;
FIG. 14 is an enlarged partial view of FIG. 13 at D of a panoramic stereo book for easy supporting display and reading use according to one embodiment of the present disclosure;
FIG. 15 is a schematic view of the front or back support of the book body of FIG. 10 without the cover according to one embodiment of the present disclosure for supporting a panoramic book for display and reading;
fig. 16 is a schematic structural view illustrating a front or back supporting device of the book body of fig. 15 for conveniently supporting the panoramic stereo book for exhibition and reading, provided with a cover cloth, according to an embodiment of the present disclosure.
[ description of main reference symbols ]
1. Book body, 11, front cover, 12, back cover, 13, protective sleeve, 14, permanent magnet;
2. the book page comprises a book page body 21, a hinge sleeve 22, a previous page 23 and a next page;
3. the first limiting part 31, the limiting concave pit 32 and the limiting bulge are arranged on the base;
4. a second stopper 41, a guide groove 42, a guide rod;
5. the device comprises a supporting device 51, a hinge groove 52, a hinge plate 53, an extension plate 54, a covering cloth 55, a telescopic cavity 56 and a limiting hole;
6. the spring pushing device comprises a spring pushing buckle 61, a spring pushing cavity 62, a compression spring 63, a sliding plate 64 and a limit buckle;
7. the shielding cloth 8, the hinged shaft 9, the panoramic three-dimensional component 10 and the magic tape.
Detailed Description
The following provides a more detailed description of the panoramic stereo book for supporting exhibition and reading, according to the embodiments of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 16, the panoramic stereo book for supporting exhibition and reading comprises: the book comprises a book body 1, wherein a panoramic three-dimensional part is arranged in the book body 1 (as shown in figure 1, when the book body 1 is opened, the panoramic three-dimensional part 9 presents a three-dimensional structure, and when the book body 1 is closed, the panoramic three-dimensional part 9 presents a two-dimensional structure).
As shown in fig. 1 to 9, the book body 1 includes at least two pages of book page bodies 2 (two pages may be provided, and a panoramic three-dimensional part 9 is provided between the two pages of book page bodies 2; multiple pages may be provided, and a panoramic three-dimensional part 9 is provided between each adjacent page body 2); in order to realize that a certain opening and closing range is ensured in the opening process of the adjacent page bodies 2 and avoid the defect that the panoramic three-dimensional part 9 is damaged due to excessive opening and closing, all the page bodies 2 are hinged through hinge shafts 8, and limit devices are arranged at the hinge shafts 8 of the adjacent page bodies 2, so that the page is turned in the limited range of the limit devices between the adjacent page bodies 2.
In order to facilitate the hinge connection between the page body 2 and the hinge shaft 8, the page body 2 and the hinge shaft 8 are connected by a hinge sleeve 21 integrally formed at the side of the page body 2. In order to ensure the connection strength between the page bodies 2 and the hinge shafts 8, at least two hinge sleeves 21 of each page body 2 are arranged, and a limiting device is arranged between the hinge sleeves 21 between the adjacent page bodies 2.
In order to guarantee that stop device simple structure not only can realize the effect of terminal point restriction position, can restrict page body 2's rotation in a plurality of positions moreover at page body 2 in-process that opens and shuts to realized that the three-dimensional part of panorama 9 between the adjacent page body 2 presents different structures, satisfied the user and read and appreciate the use. As shown in fig. 5 to 7, the stopper device includes: a plurality of first limiting parts 3 with position limiting function and second limiting parts 4 with starting point and end point limiting function; namely: this first locating part 3 includes spacing pit 31 and spacing arch 32 that adjacent hinge sleeve 21 department set up, and spacing pit 31 and spacing arch 32 are established respectively in adjacent hinge sleeve 21's contact surface department, are provided with two spacing pits 31 at least on the circular arc of page body 2 rotations. Preferably, the limit pits 31 are provided with a start point limit pit, a first presentation point limit pit, and an end point limit pit (second presentation point). Three functional positions of closing, first presenting and completely presenting the page body 2 are realized.
In order to have stable limited structure to adjacent page body 2 at starting point and terminal point position, guarantee at the limited range internal rotation, and then avoid the user in the use, turn over the defect that the page dynamics is too big and lead to damaging books. The second limiting member 4 comprises a guide groove 41 and a guide rod 42 which are arranged adjacent to the hinge sleeve 21, wherein the guide groove 41 is arc-shaped (the axis of the arc is the same as the axis of the hinge shaft 8, so that the guide rod 42 is driven by the page body 2 to rotate along the guide groove 41); the maximum arc angle of the arc is the maximum expansion angle of the adjacent page body 2, so that the rotation angle of the page body 2 is limited, the guide groove 41 and the guide rod 42 are respectively arranged at the contact surface of the adjacent hinge sleeve 21, one end of the guide rod 42 is fixedly connected with the end part of the hinge sleeve 21, and the other end of the guide rod extends into the guide groove 41 formed in the adjacent hinge sleeve 21, so that the rotation angle of the adjacent page body 2 is limited.
As shown in fig. 1 to 16, in order to further facilitate the book body 1 supporting the exhibition and the child supporting the reading, the book body 1 is provided with a supporting device 5 on the front and/or back.
In order to ensure simple structure, the three-dimensional use of the book supporting body 1 can be conveniently met. The support device 5 includes: a hinge slot 51 for mounting the hinge plate 52 and reducing the exposure of the hinge plate 52 to affect the use effect; the hinge plate 52 mainly plays a supporting role and realizes stable three-dimensional support of the book body 1; the extension plate 53 which satisfies the shortage of the hinge plate 52 length during the rotation of the hinge plate 52; a cover cloth 54 for covering the hinge slot 51 and ensuring that the whole book body 1 can be integrally drawn on the front and/or back, thereby ensuring the use effect of the book body 1. The front and/or back of the book body 1 is provided with a hinge slot 51 at the lower side, and the hinge plate 52 is limited and hinged in the hinge slot 51. In order to facilitate the extension of the extension plate 53 along the hinge plate 52, a telescopic cavity 55 is formed in the lower side of the hinge plate 52, the extension plate 53 is slidably connected in the telescopic cavity 55, and a limiting structure is arranged in the telescopic cavity 55, so that the extension plate 53 is guaranteed to be limited in position as required. The side of the hinge slot 51 far away from the book body 1 is fixedly connected with a cover cloth 54, the cover cloth 54 can be integrated with the surface layer of the front surface and/or the back surface of the book body 1, and the lower side position of the hinge slot 51 meets the requirement that the cover cloth can be flexibly separated from the surface of the front surface and/or the back surface of the book body 1; not only satisfies the shielding effect on the hinge slot 51, but also ensures the viewing effect of the whole book body 1.
Preferably, the magic tapes 10 are arranged at the edges of the two sides of the hinge slot 51, the magic tapes 10 are arranged on the surface of the hinge plate 52, the magic tapes 10 are correspondingly arranged on the lower surface of the covering cloth 54, and the covering cloth 54 is bonded with the hinge plate 52 at any time through bonding between the magic tapes 10. When book body 1 was packed up, all magic subsides 10 all adhered, guaranteed the wholeness of whole book, hidden strutting arrangement 5, reduced the influence to 1 result of use of book body.
The page turning device has the advantages that the limiting effect of the limiting device on the adjacent page bodies 2 is realized, and the page turning of the page bodies 2 is guaranteed to be smooth and safe. Specifically, this page body 2 includes many pages, and every page body 2 is equipped with two hinge sleeves 21, and two adjacent pages of page body 2 are respectively: the lower end of the upper side hinge sleeve 21 of the previous page 22 is provided with a limiting pit 31, the upper end of the upper side hinge sleeve 21 of the next page 23 is provided with a limiting bulge 32, the lower end of the lower side hinge sleeve 21 of the previous page 22 is provided with a guide groove 41, and the upper end of the lower side hinge sleeve 21 of the next page 23 is provided with a guide rod 42.
In order to realize that the page bodies 2 have a plurality of open positions, so as to present panoramic three-dimensional parts 9 with different structures, the number of the limiting pits 31 is preferably three, and the adjacent page bodies 2 are respectively in a closed state, a semi-closed state and a fully open state.
Limiting structure for limiting function of extension rod 53 and telescopic cavity 55 for legal person comprises: at least two limiting holes 56 are formed in one side, away from the book body 1, of the telescopic cavity 55, the elastic pushing buckle 6 is arranged on one side, away from the book body 1, of the extension plate 53, the elastic pushing buckle 6 is matched with the limiting holes 56 respectively, the relative positions of the extension plate 53 and the telescopic cavity 55 are limited, and the extension plate 53 can stretch in the set size position.
In order to better satisfy the limit action, this push away the bullet knot 6 and include: the ejection pushing cavity 61, the compression spring 62, the sliding plate 63 and the limit buckle 64 are formed in the surface of the extension plate 53, the limit buckle 64 is fixedly connected with the sliding plate 63, the sliding plate 63 and the limit buckle 64 are arranged in the ejection pushing cavity 61, and the compression spring 62 is arranged between the lower side of the sliding plate 63 and the bottom of the ejection pushing cavity 61; the upper end of the limit buckle 64 is matched with the structural size of the limit hole 56. Namely: the limit buckle 64 is in a rod-shaped structure, the upper end of the limit buckle 64 is in an arc shape, and the diameter of the rod-shaped structure is matched with (same as or slightly smaller than) the diameter of the limit hole.
Preferably, the projectile cavity 61 is cylindrical step-shaped, that is: the opening is small, and the inner cavity is large; the diameter of the sliding plate 63 is the same as that of the inner cavity, the sliding plate 63 is connected in the inner cavity in a sliding mode, and the limit button 64 fixedly connected with the sliding plate 63 extends out of the opening with the smaller diameter, so that the limit button 64 cannot be separated from the hinged plate 52, and therefore the connection strength between the push button 6 and the hinged plate 52 is ensured in the use process of the hinged plate 52.
Two stoppers are provided between the hinge plate 52 and the hinge slot 51 to allow the hinge plate 52 to be in an open state to support the book body 1 or the hinge plate 52 to be in the hinge slot 51. Namely: the hinge plates 52 limit the relative position between the hinge plates 52 and the hinge grooves 51 through limiting parts, so that the hinge plates 52 are completely in an open state, and the book body 1 is supported; the hinge plates 52 define the relative position between the hinge plates 52 and the hinge slots 51 by another stop arrangement of stop members that keeps the hinge plates 52 fully seated in the hinge slots 51.
In order to further reduce the occurrence of gaps at the location of the hinge sleeve 21, which may affect the reading effect of the whole book body 1, the negative effect on the panoramic stereo part 9 is reduced. Be equipped with between this adjacent page body 2 and shelter from cloth 7, shelter from cloth 7 surface and book body 1 surface integrated into one piece, shelter from cloth 7 to establish in the position department that page body 2 is close to hinge cover 21. Preferably, the whole shielding cloth 7 completely covers the inner surface of the adjacent page body 2, the surface of the shielding cloth 7 is connected with the panoramic three-dimensional part 9, and the surface of the shielding cloth is coated with patterns and colors matched with and overlapped with the panoramic three-dimensional part 9, so that the imaging effect of the whole panoramic three-dimensional part 9 is not influenced by the rotating shaft.
In order to further improve the protection effect on the book body 1, the book body 1 further comprises: the book page comprises a front cover 11 arranged at the front part of all the book page bodies 2 and a rear cover 12 arranged at the rear part of all the book page bodies 2, wherein the front cover 11 and the rear cover 12 are hinged with a hinge shaft 8, and the hinge mode of the front cover 11 and the rear cover 12 with the hinge shaft 8 is the same as the hinge mode between the book page bodies 2 and the hinge shaft 8; preferably, the hinge sleeves of the front cover 11 and the back cover 12 are respectively arranged at the upper end and the lower end of the book body 1, so as to further protect the book body 1.
In order to protect the book body 1 more completely at the fore edge, the back edge and the top of the book body 1, a protective sleeve 13 with a ring structure is fixedly connected to the edge of one side of the front cover 11 close to the book body 1, a plurality of permanent magnets 14 are embedded in the protective sleeve 13, and a plurality of permanent magnets 14 are adapted to be arranged at the edge of the back cover 12; the front cover 11 and the back cover 12 are connected by the attraction force of the permanent magnet 14. Thus, when the book body 1 is not in use, the whole book body 1 is in the cavity surrounded by the front cover 11, the back cover 12 and the protective sleeve 13.
In order to ensure the matching tightness between the front cover 11, the back cover 12 and the book body 1, the defect that the book body 1 is separated from the covers and damaged due to the gap between the edge of the book body 1 and the protective sleeve 13 is avoided. The book corners of the front cover 11 and the back cover 12 are in a circular arc shape, and the joints of the front cover 11, the back cover 12 and the book spine are in a circular arc shape; the protective sleeve 13 is arranged on the arc-shaped edge, and the protective sleeve 13, the front cover 11 and the rear cover 12 are made of flexible buffer materials. Circular-arc structure to and flexible buffer material, further guaranteed the buffering effect of the books body 1, from two aspects: the first cushioning effect that can improve books guarantees the guard action to books when books fall, and the second can avoid books to use children's injure by a crashing object, guarantees user's security. Preferably, the upper end and the lower end of the page body 2 are arc-shaped, and the arc-shaped structure of the page body 2 is adapted to the structural size of the inner cavity of the protective sleeve 13.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.