CN212353345U

CN212353345U - Iron-bottom loose-leaf binder for portable preservation of loose-leaf paper

Info

Publication number: CN212353345U
Application number: CN202020837461.5U
Authority: CN
Inventors: 姚少平
Original assignee: SHANTOU JINHUI INDUSTRIAL CO LTD
Current assignee: SHANTOU JINHUI INDUSTRIAL CO LTD
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-01-15
Anticipated expiration: 2030-05-19

Abstract

The utility model discloses a portable loose-leaf binder with iron bottom for storing loose-leaf paper, which comprises a first clamping piece, a second clamping piece and a metal base, wherein the first clamping piece, the second clamping piece and the metal base are all in the shape of long strips; the metal base is provided with a groove with an arc-shaped section, and the outer edge of the first clamping piece is provided with a plurality of first arc hooks bent inwards; a plurality of second arc hooks bent inwards are arranged on the outer edge of the second clamping piece; the number of the second arc hooks is the same as that of the first arc hooks and corresponds to that of the first arc hooks one by one; the inner edge of the first clamping piece is hinged with the inner edge of the second clamping piece to form a loose-leaf binder, the bottom of the loose-leaf binder is positioned in the groove, and the outer edge of the first clamping piece and the outer edge of the second clamping piece are respectively and tightly embedded on the two side edges of the metal base; the corresponding first arc hook is in clamping fit with the second arc hook. The binder with the iron bottom has the advantages of simple structure, convenient operation, firmness, free loading and taking of loose-leaf paper, portability, repeated use, environmental protection and practicability.

Description

Iron-bottom loose-leaf binder for portable preservation of loose-leaf paper

Technical Field

The utility model relates to the technical field of stationery, especially, relate to a portable loose-leaf binder at bottom of iron of preserving loose-leaf paper.

Background

The loose-leaf binder is applied to the loose-leaf notebook, so that the paper in the loose-leaf notebook can be randomly disassembled, replaced and combined, and the loose-leaf binder has the characteristics of convenience in arrangement and flexibility in use. The existing loose-leaf binder comprises a metal strip-shaped sheet, a plurality of left semicircular rings and a plurality of right semicircular rings, wherein the number of the left semicircular rings is the same as that of the right semicircular rings and the left semicircular rings correspond to the right semicircular rings one by one; the lower extreme of each left semicircle ring is all articulated to be installed on the left side border of metal strip piece, and the lower extreme of each right semicircle ring is all articulated to be installed on the right side border of metal strip piece, and the upper end of the left semicircle ring that corresponds presss from both sides tight cooperation with the upper end of second circular arc hook. However, the metal strip sheets of the binder are generally fixedly arranged in the file binder or the notebook, so that the whole binder is fixed in the file binder or the notebook, the whole binder cannot be used repeatedly, the consumption is easy, the resource waste is caused, and the loose-leaf paper is inconvenient to load and take.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a portable loose-leaf binder at bottom of iron of preserving loose-leaf paper, this kind of loose-leaf binder at bottom of iron simple structure, convenient operation, it is firm, freely adorn and get loose-leaf paper, can hand-carry, use repeatedly, the environmental protection is practical.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

the utility model provides a portable iron-bottom loose-leaf binder of keeping loose-leaf paper which characterized in that: the clamping device comprises a first clamping piece, a second clamping piece and a metal base, wherein the first clamping piece, the second clamping piece and the metal base are all in a long strip shape; the metal base is provided with a groove with an arc-shaped section, the outer edge of the first clamping piece is provided with a plurality of first arc hooks which are bent inwards, and the first arc hooks are sequentially arranged from front to back along the length direction of the first clamping piece; a plurality of second arc hooks bent inwards are arranged on the outer edge of the second clamping piece, and the second arc hooks are sequentially arranged from front to back along the length direction of the second clamping piece; the number of the second arc hooks is the same as that of the first arc hooks and corresponds to that of the first arc hooks one by one; the inner edge of the first clamping piece is hinged with the inner edge of the second clamping piece to form a loose-leaf binder, the bottom of the loose-leaf binder is positioned in the groove, and the outer edge of the first clamping piece and the outer edge of the second clamping piece are respectively and tightly embedded on the two side edges of the metal base; the corresponding first arc hook is in clamping fit with the second arc hook.

The metal base is an arc-shaped metal sheet with the cross section, and two side edges of the metal sheet have elasticity to enable the metal sheet to deform towards two sides, so that the loose-leaf binder body can be conveniently mounted and dismounted.

Two side edges of the loose-leaf binder body are respectively and tightly embedded on two side edges of the metal base, the cross section of the metal base is arc-shaped by utilizing the lever principle to serve as an auxiliary support, the loose-leaf binder body is stably positioned on the metal base, the metal base is not required to be fixedly installed in a file or a notebook, the whole loose-leaf binder can be repeatedly used, the loss can not occur, the resource waste is caused, and the environment is protected and practical. When the loose-leaf binder is to be opened, a user respectively pinches the first arc hook and the second arc hook by using two hands and opens the first arc hook and the second arc hook outwards, so that the first arc hook and the second arc hook are separated from matching, after the loose-leaf binder is opened, loose-leaf paper can be sleeved on the first arc hook or the second arc hook, the opening force used in the opening process is small, and the loose-leaf binder is simple and convenient to open. When the first arc hook and the second arc hook are clamped, a user presses the first arc hook and the second arc hook towards the middle by using two hands, so that the first arc hook and the second arc hook are closed and fastened towards the middle, and the loose-leaf paper can be clamped.

The loose-leaf binder has the advantages of simple appearance structure, stable structure, accurate alignment, no dislocation from top to bottom and from left to right, tight clamping, simple and convenient binding, capability of accommodating more loose-leaf paper, free loading and unloading of the loose-leaf paper, portability and storage, stable and safe file storage, smooth document turnover, repeated use, environmental protection and practicability.

As a preferred embodiment of the present invention, the inner edge of the first clip member is pivotally connected to the inner edge of the second clip member.

As a further preferred aspect of the present invention, the inner end surface of the first clamping member is a plane, the inner end surface of the second clamping member is a plane, and the inner end surface of the first clamping member is in contact with the inner end surface of the second clamping member. The inner edge of the first clamping piece is pivoted with the inner edge of the second clamping piece through the contact and matching of the inner end surface of the first clamping piece and the inner end surface of the second clamping piece. When the first clamping piece is clamped with the second clamping piece, the inner end face of the first clamping piece is contacted with the inner end face of the second clamping piece; when the first clamping piece and the second clamping piece are opened, the lower edge of the inner end face of the first clamping piece is abutted against the lower edge of the inner end face of the second clamping piece.

As a further preferred aspect of the present invention, the inner edge of the first clamping member is provided with a plurality of first supporting pieces arranged in sequence along the length direction of the first clamping member, the inner edge of the second clamping member is provided with a plurality of second supporting pieces arranged in sequence along the length direction of the second clamping member, and the first supporting pieces and the second supporting pieces are arranged in sequence relatively and are crossed to be inserted into the connecting portion of the inner edge of the first clamping member and the inner edge of the first clamping member. The first supporting sheet and the second supporting sheet which are crossed and inserted are arranged to support the pivoting structure of the inner edge of the first clamping piece and the inner edge of the second clamping piece, so that the structure of the loose-leaf binder body is firmer.

As a still further preferable aspect of the present invention, the first supporting plate is provided with a first inclined plane gradually inclined downward, and the inner edge of the second clamping member is located above the first inclined plane; the second supporting sheet is provided with a second inclined plane which gradually inclines downwards, and the inner edge of the first clamping piece is positioned above the second inclined plane. The opening amplitude of the first clamping piece and the opening amplitude of the second clamping piece are matched by arranging the first inclined plane and the second inclined plane which are inclined downwards.

As the preferred scheme of the utility model, a ring is formed to corresponding first circular arc hook and second circular arc hook under the state of clamping.

As a further preferred aspect of the present invention, in the corresponding first arc hook and the second arc hook, the clamping end of the first arc hook is provided with the projection, and the clamping end of the second arc hook is provided with the concave hole, and in the clamping state of the first arc hook and the second arc hook, the projection is matched with the concave hole. The convex columns are matched with the concave holes in an inosculating mode, so that the paired first arc hooks and the paired second arc hooks can be guaranteed to be in a clamped state, and the paired first arc hooks and the paired second arc hooks are aligned with each other and are tightly nested together.

As a preferred scheme of the utility model, a first scarf joint edge which is bent inwards is arranged along one side edge of the groove, and a second scarf joint edge which is bent inwards is arranged along the other side edge of the groove; a first strip-shaped slot is formed in the outer edge of the first clamping piece, and a second strip-shaped slot is formed in the outer edge of the second clamping piece; the first scarf joint edge is positioned in the first strip-shaped slot and is tightly contacted with the slot wall of the first strip-shaped slot; the second scarf joint limit is in the second bar slot and second scarf joint limit and the cell wall in close contact with of second bar slot. Two side edges of the metal base are respectively bent inwards to form a first scarf joint edge and a second scarf joint edge, so that the metal base can be tightly embedded with a first strip-shaped slot at the outer edge of the first clamping piece and a second strip-shaped slot at the outer edge of the second clamping piece without adding parts, and the structure is very firm.

As a preferred scheme of the present invention, the front end and the rear end of the binder body are both provided with a kneading control mechanism, the kneading control mechanism includes a first supporting block and a second supporting block, the lower end of the first supporting block is disposed at the end of the first clamping member, and the lower end of the second supporting block is disposed at the end of the second clamping member; under the state that first circular arc hook and second circular arc hook cramp, the second props up the superpose around piece and the first prop up the piece to the upper end of second props up the upper end of piece and the upper end of first prop up the piece and keep away from relatively. The first branch block and the second branch block are both half-moon-shaped. When the first arc hook and the second arc hook are to be opened, a user can respectively pinch the upper ends of the kneading control mechanisms at the front end and the rear end of the binder body by using two hands to enable the upper end of the second branch block and the upper end of the first branch block to be close to each other, and under the assistance of tightly embedding the binder body on the metal base, the first arc hook on the first binder and the second arc hook on the second binder are enabled to do pivoting motion and are easily separated and separated, so that the binder can be opened. The kneading control mechanism is simple to operate, smooth and natural in kneading action, capable of conforming to the principle of human mechanics, labor-saving in use and convenient and simple in file storing and taking.

In a concrete scheme, the second is propped up the upper end inboard of piece and is equipped with the second stopper, and the first upper end outside of propping up the piece is equipped with first stopper under the state that first circular arc hook and second circular arc hook were opened, second stopper and the cooperation of first stopper joint.

In another kind of concrete scheme, the second is propped up the upper end outside of piece and is equipped with the second stopper, and the upper end inboard of first piece is equipped with first stopper under the state that first circular arc hook and second circular arc hook are opened, second stopper and the cooperation of first stopper joint.

As the preferred scheme of the utility model, the material of metal base is stainless steel. The stainless steel base has high hardness, good rigidity, difficult deformation, difficult rustiness, long service cycle and repeated cycle use.

The first clamping piece, the first arc hook, the second clamping piece and the second arc hook are made of plastics, the first clamping piece and the first arc hook are integrally formed by injection molding, and the second clamping piece and the second arc hook are integrally formed by injection molding. Preferably, the plastic is ABS plastic. ABS plastics are a thermoplastic high-molecular structure material with high strength, good toughness and easy processing and forming, and the material is light and mellow without scratching hands and scratching documents.

In general, binders with different hole numbers are used for loose-leaf books with different sizes, and the hole numbers of the inner page edges of the loose-leaf books comprise 4 holes, 6 holes, 9 holes, 20 holes, 26 holes, 30 holes and the like. The number of the first circular arc hooks and the second circular arc hooks can be properly increased according to the length of different inner pages, and the first circular arc hooks and the second circular arc hooks with corresponding number are selected according to the number of the binding holes on the edge of the inner page.

Compared with the prior art, the utility model, have following advantage:

the portable loose-leaf binder with the iron bottom for storing loose-leaf paper has the advantages of simple structure, convenient operation, firmness, free loading and taking of loose-leaf paper, portability, repeated use, environmental protection and practicability.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the components of FIG. 1 in an exploded condition;

fig. 3 is a schematic structural view illustrating a structure of the first clip member and the second clip member according to an embodiment of the present invention.

Detailed Description

The following further describes the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1-3, the portable binder with iron bottom for storing loose-leaf paper comprises a first clamping piece 1, a second clamping piece 2 and a metal base 3, wherein the first clamping piece 1, the second clamping piece 2 and the metal base 3 are all in a strip shape; a groove 31 with an arc-shaped section is arranged on the metal base 3, a plurality of first arc hooks 11 which are bent inwards are arranged on the outer edge of the first clamping piece 1, and the first arc hooks 11 are sequentially arranged from front to back along the length direction of the first clamping piece 1; a plurality of second arc hooks 21 which are bent inwards are arranged on the outer edge of the second clamping piece 2, and the second arc hooks 21 are sequentially arranged from front to back along the length direction of the second clamping piece 2; the number of the second circular arc hooks 21 is the same as that of the first circular arc hooks 11 and corresponds to that of the first circular arc hooks one by one; the inner edge of the first clamping piece 1 and the inner edge of the second clamping piece 2 are pivoted to form a loose-leaf binder 4, the bottom of the loose-leaf binder 4 is positioned in the groove 31, and the outer edge of the first clamping piece 1 and the outer edge of the second clamping piece 2 are respectively and tightly embedded on two side edges of the metal base 3; the corresponding first circular arc hook 11 is in clamping fit with the second circular arc hook 21.

Above-mentioned metal base 3 is curved sheetmetal for the cross-section, and two sides of sheetmetal are along having elasticity and making it can go on deforming toward both sides, the installation and the dismantlement of the loose-leaf binder body 4 of being convenient for.

The inner end surface 14 of the first clamping piece 1 is a plane, the inner end surface 24 of the second clamping piece 2 is a plane, and the inner end surface 14 of the first clamping piece 1 is in contact fit with the inner end surface 24 of the second clamping piece 2. The inner edge of the first clamping member 1 is pivoted with the inner edge of the second clamping member 2 by the contact fit of the inner end surface 14 of the first clamping member 1 with the inner end surface 24 of the second clamping member 2. When the first clip member 1 is clipped to the second clip member 2, the inner end face 14 of the first clip member 1 contacts the inner end face 24 of the second clip member 2; when the first and second clip members 1 and 2 are opened, the lower edge of the inner end surface 14 of the first clip member 1 and the lower edge of the inner end surface 24 of the second clip member 2 abut against each other.

A plurality of first supporting sheets 12 arranged along the length direction of the first clamping piece 1 in sequence are arranged below the inner edge of the first clamping piece 1, a plurality of second supporting sheets 22 arranged along the length direction of the second clamping piece 2 in sequence are arranged below the inner edge of the second clamping piece 2, and the first supporting sheets 12 and the second supporting sheets 22 are arranged relatively in sequence and are crossed and inserted at the joint of the inner edge of the first clamping piece 1 and the inner edge of the first clamping piece 1. The first supporting sheet 12 and the second supporting sheet 22 which are crossed and inserted are arranged to support the pivoting structure of the inner edge of the first clamping piece 1 and the inner edge of the second clamping piece 2, so that the structure of the loose-leaf binder 4 is firmer.

The first supporting sheet 12 is provided with a first inclined plane 121 which gradually inclines downwards, and the inner edge of the second clamping piece 2 is positioned above the first inclined plane 121; the second supporting plate 22 is provided with a second inclined surface 221 which is gradually inclined downwards, and the inner edge of the first clamping member 1 is positioned above the second inclined surface 221. The opening amplitudes of the first clamping piece 1 and the second clamping piece 2 are matched by arranging the first inclined surface 121 and the second inclined surface 221 which incline downwards.

The corresponding first arc hook 11 and the second arc hook 21 form a circular ring in a clamped state; in the corresponding first circular-arc hook 11 and the second circular-arc hook 21, a convex column 111 is arranged at the clamping end of the first circular-arc hook 11, a concave hole 211 is arranged at the clamping end of the second circular-arc hook 21, and the convex column 111 is matched with the concave hole 211 in a clamping state of the first circular-arc hook 11 and the second circular-arc hook 21. The convex column 111 is matched with the concave hole 211, so that the paired first circular-arc hooks 11 and the paired second circular-arc hooks 21 are in a clamped state, and the paired first circular-arc hooks 11 and the paired second circular-arc hooks 21 are aligned with each other and are tightly nested together.

In this embodiment, as viewed from the front to the back, the clamping end of the first arc hook 11 is provided with a convex column, and the clamping end of the corresponding second arc hook 21 is provided with a concave hole; a concave hole is arranged at the clamping end of the second first arc hook 11, and a convex column is arranged at the clamping end of the corresponding second arc hook 21; by analogy, convex columns and concave holes on the clamping end of the first arc hook 11 are arranged at intervals, and concave holes and convex columns on the clamping end of the second arc hook 11 are arranged at intervals.

A first scarf joint edge 32 which is bent inwards is arranged on one side edge of the groove 31, and a second scarf joint edge 33 which is bent inwards is arranged on the other side edge of the groove 31; a first strip-shaped slot 13 is formed in the outer edge of the first clamping piece 1, and a second strip-shaped slot 23 is formed in the outer edge of the second clamping piece 2; the first scarf edge 32 is in the first strip-shaped slot 13 and the first scarf edge 32 is in close contact with the slot wall of the first strip-shaped slot 13; the second engagement edge 33 is located in the second elongated insertion groove 23 and the second engagement edge 33 is in close contact with the groove wall of the second elongated insertion groove 23. The two side edges of the metal base 3 are respectively bent inwards to form a first scarf joint edge 32 and a second scarf joint edge 33, so that the metal base 3 can be tightly embedded with the first strip-shaped slot 13 at the outer edge of the first clamping piece 1 and the second strip-shaped slot 23 at the outer edge of the second clamping piece 2 without adding parts, and the structure is very firm.

The front end and the rear end of the loose-leaf binder body 4 are both provided with a kneading control mechanism 5, the kneading control mechanism 5 comprises a first branch block 51 and a second branch block 52, the lower end of the first branch block 51 is arranged at the end part of the first clamp 1, and the lower end of the second branch block 52 is arranged at the end part of the second clamp 2; in a state where the first circular-arc hook 11 is sandwiched by the second circular-arc hook 21, the second branch block 52 is superposed on the first branch block 51 in the front-rear direction, and the upper end of the second branch block 52 is relatively distant from the upper end of the first branch block 51. The first branch block 51 and the second branch block 52 are half-moon-shaped. When the first circular-arc hook 11 and the second circular-arc hook 21 are to be opened, a user can respectively pinch the upper ends of the kneading control mechanisms 5 at the front end and the rear end of the binder body 4 by using two hands, so that the upper ends of the second supporting blocks 52 are close to the upper ends of the first supporting blocks 51, and under the assistance of tightly embedding the binder body 4 by the metal base 3, the first circular-arc hook 11 on the first binder 1 and the second circular-arc hook 21 on the second binder 2 perform pivoting motion, so that the binder can be easily separated and separated, and the binder can be opened. The kneading control mechanism 5 is simple to operate, smooth and natural in kneading action, accords with the principle of human mechanics, saves labor in use, and is convenient and simple to store and take files.

In the kneading control mechanism 5 at the front end of the binder, the inner side of the upper end of the second branch block 52 is provided with the second limiting block 521, the outer side of the upper end of the first branch block 51 is provided with the first limiting block 511, and the second limiting block 521 is in clamping fit with the first limiting block 511 in the state that the first arc hook 11 and the second arc hook 21 are opened.

In the kneading control mechanism 5 at the rear end of the binder, the second limiting block 521 is arranged on the outer side of the upper end of the second branch block 52, the first limiting block 511 is arranged on the inner side of the upper end of the first branch block 51, and the second limiting block 521 is in clamping fit with the first limiting block 511 in the state that the first arc hook 11 and the second arc hook 21 are opened.

The metal base 3 is made of stainless steel. The stainless steel base has high hardness, good rigidity, difficult deformation, difficult rustiness, long service cycle and repeated cycle use.

The first clamping piece 1, the first arc hook 11, the second clamping piece 2 and the second arc hook 21 are made of ABS plastic, the first clamping piece 1 and the first arc hook 11 are integrally formed by injection molding, and the second clamping piece 2 and the second arc hook 21 are integrally formed by injection molding. ABS plastics are a thermoplastic high-molecular structure material with high strength, good toughness and easy processing and forming, and the material is light and mellow without scratching hands and scratching documents.

In general, binders with different hole numbers are used for loose-leaf books with different sizes, and the hole numbers of the inner page edges of the loose-leaf books comprise 4 holes, 6 holes, 9 holes, 20 holes, 26 holes, 30 holes and the like. The number of the first circular-arc hooks 11 and the second circular-arc hooks 21 can be increased properly according to the length of different inner pages, and the first circular-arc hooks 11 and the second circular-arc hooks 21 with corresponding number are selected according to the number of binding holes on the edge of the inner page.

Two side edges of the above-mentioned loose-leaf binder body 4 closely gomphosis respectively are on two side edges of metal base 3, utilize lever principle to let the cross-section be curved metal base 3 and come as the auxiliary stay, make the loose-leaf binder body 4 firm be in on metal base 3, metal base 3 need not fixed mounting in file or notebook, whole loose-leaf binder can be alone and use repeatedly, can not take place the loss and cause the wasting of resources, environmental protection practicality. When the binder is to be opened, a user respectively pinches the kneading control mechanisms 5 at the front end and the rear end of the binder body 4 by using two hands, so that the first circular arc hook 11 and the second circular arc hook 21 are separated from matching, after the binder is opened, loose-leaf paper can be sleeved on the first circular arc hook 11 or the second circular arc hook 21, the opening force used in the opening process is very small, and the opening is simple and convenient. When the binder is to be clamped, a user uses both hands to press the first circular-arc hook 11 and the second circular-arc hook 21 towards the middle, so that the first circular-arc hook 11 and the second circular-arc hook 21 are closed and fastened towards the middle, and loose-leaf paper can be clamped.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a portable iron-bottom loose-leaf binder of keeping loose-leaf paper which characterized in that: the clamping device comprises a first clamping piece, a second clamping piece and a metal base, wherein the first clamping piece, the second clamping piece and the metal base are all in a long strip shape; the metal base is provided with a groove with an arc-shaped section, the outer edge of the first clamping piece is provided with a plurality of first arc hooks which are bent inwards, and the first arc hooks are sequentially arranged from front to back along the length direction of the first clamping piece; a plurality of second arc hooks bent inwards are arranged on the outer edge of the second clamping piece, and the second arc hooks are sequentially arranged from front to back along the length direction of the second clamping piece; the number of the second arc hooks is the same as that of the first arc hooks and corresponds to that of the first arc hooks one by one; the inner edge of the first clamping piece is hinged with the inner edge of the second clamping piece to form a loose-leaf binder, the bottom of the loose-leaf binder is positioned in the groove, and the outer edge of the first clamping piece and the outer edge of the second clamping piece are respectively and tightly embedded on the two side edges of the metal base; the corresponding first arc hook is in clamping fit with the second arc hook.

2. The portable loose-leaf binder with iron bottom for storing loose-leaf paper as claimed in claim 1, wherein: the inner edge of the first clamping piece is pivoted with the inner edge of the second clamping piece.

3. The portable loose-leaf binder with iron bottom for storing loose-leaf paper as claimed in claim 2, wherein: the inner end face of the first clamping piece is a plane, the inner end face of the second clamping piece is a plane, and the inner end face of the first clamping piece is in contact fit with the inner end face of the second clamping piece.

4. A portable loose-leaf binder with iron base for holding loose-leaf pages as claimed in claim 3, wherein: the utility model discloses a clamping device, including first folder, second folder, first support piece and second support piece, the interior border below of first folder is equipped with a plurality of first support pieces that arrange in proper order along the length direction of this first folder, the interior border below of second folder is equipped with a plurality of second support pieces that arrange in proper order along the length direction of this second folder, and first support piece sets up relatively in proper order with the second support piece and alternately inserts and close on the junction of the interior border of first folder and the interior border of first folder.

5. The portable loose-leaf binder with iron bottom for storing loose-leaf paper as claimed in claim 4, wherein: the first supporting sheet is provided with a first inclined plane which gradually inclines downwards, and the inner edge of the second clamping piece is positioned above the first inclined plane; the second supporting sheet is provided with a second inclined plane which gradually inclines downwards, and the inner edge of the first clamping piece is positioned above the second inclined plane.

6. The portable loose-leaf binder with iron bottom for storing loose-leaf paper as claimed in claim 1, wherein: the corresponding first arc hook and the second arc hook form a circular ring in a clamped state; in the corresponding first arc hook and the second arc hook, the clamping end of the first arc hook is provided with a convex column, the clamping end of the second arc hook is provided with a concave hole, and the convex column is matched with the concave hole in a clamping state of the first arc hook and the second arc hook.

7. The portable loose-leaf binder with iron bottom for storing loose-leaf paper as claimed in claim 1, wherein: a first scarf joint edge bent inwards is arranged on one side edge of the groove, and a second scarf joint edge bent inwards is arranged on the other side edge of the groove; a first strip-shaped slot is formed in the outer edge of the first clamping piece, and a second strip-shaped slot is formed in the outer edge of the second clamping piece; the first scarf joint edge is positioned in the first strip-shaped slot and is tightly contacted with the slot wall of the first strip-shaped slot; the second scarf joint limit is in the second bar slot and second scarf joint limit and the cell wall in close contact with of second bar slot.

8. The portable loose-leaf binder with iron bottom for storing loose-leaf paper as claimed in claim 1, wherein: the front end and the rear end of the loose-leaf binder body are both provided with a kneading control mechanism, the kneading control mechanism comprises a first supporting block and a second supporting block, the lower end of the first supporting block is arranged at the end part of the first clamping piece, and the lower end of the second supporting block is arranged at the end part of the second clamping piece; under the state that first circular arc hook and second circular arc hook cramp, the second props up the superpose around piece and the first prop up the piece to the upper end of second props up the upper end of piece and the upper end of first prop up the piece and keep away from relatively.

9. The portable loose-leaf binder with iron bottom for holding loose-leaf paper as claimed in claim 8, wherein: and in the kneading control mechanism at the front end of the loose-leaf binder, a second limiting block is arranged on the inner side of the upper end of the second branch block, a first limiting block is arranged on the outer side of the upper end of the first branch block, and the second limiting block is clamped and matched with the first limiting block when the first arc hook and the second arc hook are opened.

10. The portable loose-leaf binder with iron bottom for holding loose-leaf paper as claimed in claim 8, wherein: and in the kneading control mechanism at the rear end of the loose-leaf binder, a second limiting block is arranged on the outer side of the upper end of the second branch block, a first limiting block is arranged on the inner side of the upper end of the first branch block, and the second limiting block is clamped and matched with the first limiting block when the first arc hook and the second arc hook are opened.