TW202413133A - Binding tools and folders - Google Patents

Abstract

[Topic] To provide a binder capable of properly maintaining the open position of a binding ring. [Solution] The binder is configured to be capable of adopting a closed position in which the front end portions of the first and second ring components (d1(r), e1(r)) are engaged with each other and an open position in which the front end portions of the first and second ring components (d1(r), e1(r)) are separated. The first binding member (D) has a base portion (d2) provided with a through hole (M) penetrating in the up-down direction, and the second binding member (E) has a convex portion (t) which can temporarily expand the separation width (w8) of the left and right intermediate wall portions (6, 7) forming the through hole (M) at the middle position (U) in the process of changing the posture from the closed posture to the open posture.

Description

Binders, folders

The present invention relates to a binder and a folder.

In the past, there is known a binder comprising: a first binder component having a first ring structure, and a second binder component having a second ring structure, and the binder component is configured to be able to adopt a closed posture in which the front end portions of the first and second ring structures are engaged with each other, and an open posture in which the front end portions of the first and second ring structures are separated (for example, refer to patent document 1).

Conventional binders have a structure that cannot stably maintain an open position. Therefore, conventional binders sometimes cause trouble for users in binding objects such as paper. [Prior technical literature] [Patent literature]

[Patent Document 1] Japanese Patent No. 6681742

[Problem to be solved by the invention]

The present invention is made with an eye on the above-mentioned situation, and its purpose is to provide a binder that can at least properly maintain the open position of the binding ring, and a folder equipped with the binder. [Means for solving the problem]

That is, the present invention constitutes the following structure.

The invention described in claim 1 is a binder comprising: a first binder component having a first ring structure, and a second binder component having a second ring structure, and the binder can be configured to adopt a closed position in which the front end portions of the first and second ring structures are engaged with each other, and an open position in which the front end portions of the first and second ring structures are separated, and is characterized in that: the first binder component has a base portion, which has a through hole penetrating in the up-and-down direction or a recessed portion open in the upward direction, and the second binder component has a protrusion that can temporarily expand the separation width of a pair of wall portions forming the through hole or the recessed portion during the process of changing the posture from the closed position to the open position.

The invention described in claim 2 is the binder described in claim 1, wherein the second binder component comprises: a shaft portion rotatably supported relative to the base portion; and the second ring component integrally extending from the shaft portion, wherein the shaft portion is provided with the protrusion.

The invention described in claim 3 is the binding device described in claim 2, wherein the base portion comprises: a pair of shaft support portions capable of rotatably supporting both end portions of the shaft portion, and the through hole or the recess provided between the pair of shaft support portions.

The invention described in claim 4 is the binder described in claim 1, wherein the first binder component and the second binder component are respectively formed of synthetic resin.

The invention described in claim 5 is a document folder having a cover and a binder described in any one of claims 1 to 4 mounted on the cover.

The invention described in claim 6 is the document folder described in claim 5, wherein the cover comprises a front cover, a bottom cover, and a side cover, and the first binding member is mounted on the inner side of the side cover using a mounting device.

The invention described in claim 7 is a file folder described in claim 6, wherein the mounting device comprises: a mounting base located on the outer side of the side cover, and a snap-fitting protrusion, which protrudes from the mounting base, penetrates the side cover, and snaps with the snap-fitting portion formed on the base. [Effect of the invention]

As described above, according to the present invention, at least a binder capable of properly maintaining the open posture of the binder ring and a document folder equipped with the binder can be provided.

Hereinafter, an embodiment of the present invention will be described with reference to Figures 1 to 16. In addition, the vertical direction, the horizontal direction, and the front-back direction in the present embodiment are set for the convenience of description.

In this embodiment, the present invention is applicable to a binder B capable of binding objects J (hereinafter simply referred to as "bound objects J") such as papers having binding holes j1, and a document folder having the binder B.

The document folder includes a cover A and two binders B installed on the inner surface of the side cover 3 of the cover A. The two binders B have the same structure. The two binders B are installed on the front end (front end) and the inner end (rear end) of the side cover 3 using a mounting tool G in a manner separated from each other.

The following describes each folder structure in detail.

<<Cover A>> Cover A has a front cover 1, a side cover 3, and a bottom cover 2 connected to each other via a hinge N so as to be relatively rotatable. Cover A is in the form of a sheet made of synthetic resin.

The cover A is constructed so as to be able to adopt a posture changeable among: a front cover 1, a side cover 3, and a bottom cover 2 that can be unfolded in roughly the same plane on a loading surface such as a top plate in an open posture (H); a closed posture in which the inner surfaces of the front cover 1 and the bottom cover 2 can face each other (T); and a folded posture in which the outer surfaces of the front cover 1 and the bottom cover 2 can face each other (K).

<Front cover 1> The front cover 1 is generally in the shape of a rectangular plate. The front cover 1 includes: a base front cover portion 12 disposed adjacent to the side cover 3 via a hinge portion N; and a front cover body portion 11 connected to the base front cover portion 12 via an intermediate hinge portion cn.

In this embodiment, the front cover 1 is composed of a front cover body 11, a middle hinge cn, and a base front cover 12. That is, the middle hinge cn is provided on the front cover 1. Therefore, the front cover 1 in the closed position (T) corresponds to the amount, number, size, etc. of the bound objects J bound by the binder B, so that the relative position of the front cover body 11 and the base front cover 12 can be flexibly changed.

The base end front cover portion 12 is set to be substantially the same as or shorter than the width w1 of the side cover 3. In this embodiment, the base end front cover portion 12 is set to be shorter than the width w1 of the side cover 3. The front cover body portion 11 is a main portion constituting the front cover 1.

The front cover 1 has a first through hole a1, which is a through hole that allows the front and rear binding rings R(f), R(r) in the binder B to pass through, so that the position can be changed between the open position (H) and the closed position (T). The first through hole a1 is formed so that the left part of the front and rear binding rings R(f), R(r) can pass through, that is, the front and rear second ring components e1(f), e1(r) can pass through.

In addition, the first connecting hole a1 corresponds to the movable area of the second ring components e1(f) and e1(r) at the front and rear of the movable circumferential portion e2, and is not only provided on the front cover body 11 and the base end front cover portion 12 constituting the front cover 1, but also across the side cover 3. The left-right dimension w4 of the first connecting hole a1 is set longer than the left-right dimension w5 of the second connecting hole a2 described later.

<Bottom cover 2> The bottom cover 2 is generally in the shape of a rectangular plate. The bottom cover 2 includes: a base end bottom cover portion 22 adjacent to the side cover 3 via a hinge portion N; and a bottom cover body portion 21 connected to the base end front cover portion 22 via an intermediate hinge portion cn.

In this embodiment, the bottom cover 2 is composed of a bottom cover body 21, a middle hinge cn, and a base bottom cover 22. That is, the middle hinge cn is provided on the bottom cover 2. Therefore, the bottom cover 2 in the closed position (T) corresponds to the amount, number, size, etc. of the bound objects J bound by the binder B, so that the relative position of the bottom cover body 21 and the base bottom cover 22 can be flexibly changed.

The base bottom cover portion 22 is set to be substantially the same as or shorter than the width w1 of the side cover 3. In this embodiment, the base bottom cover portion 22 is set to be shorter than the width w1 of the side cover 3. The bottom cover body 21 is a main part constituting the bottom cover 2.

The bottom cover 2 has a second through hole a2, which is a through hole that allows the front and rear binding rings R(f), R(r) in the binder B to pass through, so that the position can be changed between the open position (H) and the closed position (T). The second through hole a2 can pass through the right part of the front and rear binding rings R(f), R(r), that is, can pass through the front and rear first ring components d1(f), d1(r).

Furthermore, the second communication hole a2 is provided across the bottom cover body 21 and the base bottom cover 22 constituting the bottom cover 2. The left-right dimension w5 of the second communication hole a2 is set shorter than the left-right dimension w4 of the first communication hole a1.

<Side cover 3> The side cover 3 is provided between the front cover 1 and the bottom cover 2. The lateral width w1 of the side cover 3 is set to be longer than the lateral width w2 of the base portion d2 constituting the binder B, and is set to be shorter than the lateral width w3 of the front and rear binding rings R(f) and R(r) forming the closed posture (C).

The binders B are separately installed at the front end (end on the front side) and the rear end (end on the back side) of the side cover 3. That is, the file folder has two binders B separately arranged in the front-rear direction relative to the side cover 3. The side cover 3 is provided with a through hole 31 through which the engaging protrusion g2 of the mounting tool G for mounting each binder B penetrates.

<Hinge N, middle hinge cn> Hinge N and middle hinge cn are called resin hinges. That is, hinge N and middle hinge cn are formed thinner than front cover body 11, base front cover 12, side cover 3, bottom cover body 21 and base bottom cover 22, so that they are easy to deform.

In addition, the front cover 1 and the bottom cover 2 may also be structures without the middle hinge part cn.

<<Binding tool B>> Binding tool B includes: front and rear binding rings (R(f)), (R(r)), which are configured to be able to adopt an open posture (P) and a closed posture (C); and a single base portion d2 mounted on the inner surface of the side cover 3, which is provided on the base end side of the front and rear binding rings R(f), R(r).

The binder B comprises: a first binder component D, which is provided with front and rear first ring structures d1(f), d1(r) constituting front and rear binding rings R(f), R(r); and a second binder component E, which is provided with front and rear second ring structures e1(f), e1(r) constituting front and rear binding rings R(f), R(r).

The binder B is configured to be capable of adopting a closed position (C) in which the front end portions of the first and second ring structures d1(f), d1(r), e1(f), and e1(r) at the front and rear are engaged with each other, and an open position (P) in which the front end portions of the first and second ring structures d1(f), d1(r), e1(f), and e1(r) at the front and rear are separated.

More specifically, the binder B is configured such that the second binder component E can rotate relative to the first binder component D, so that the front and rear binding rings R(f), R(r) can form a closed position (C) in a closed ring shape and the front and rear binding rings R(f), R(r) can form an open position (P) in which the front and rear binding rings R(f), R(r) are not in a closed ring shape.

<First binding member D> The first binding member D is integrally formed of synthetic resin. The first binding member D is mounted on the inner side of the side cover 3 using a mounting device G.

The first binder component D comprises: a base portion d2, which is provided with an axis portion e2 capable of mounting the second binder component E, an axis portion receiving space sp which is at least open downward; and front and rear first ring forming portions d1(f), d1(r) which are integrally extended from the base portion d2 and form front and rear binding rings R(f), R(r). The axis portion receiving space sp of the base portion d2 is provided in the longitudinal center portion (front and rear center portion) of the base portion d2.

[Base d2] The base d2 has: front and rear engagement holes 4f and 4r provided at both ends in the longitudinal direction and serving as engagement portions capable of engaging with the engagement protrusion g2 of the mounting device G; a pair of front and rear shaft support portions 5f and 5r capable of rotatably supporting both ends of the shaft portion e2 provided at the second binder component E; a through hole M provided between the front shaft support portion 5f and the rear shaft support portion 5r and extending in the up-down direction; and front and rear notches Y provided between the front and rear engagement holes 4f and 4r and the through hole M for avoiding interference with the base ends of the front and rear second ring components e1(f) and e1(r) in the second binder component E.

The front and rear engaging holes 4f and 4r are arranged in the base part d2 at the outer side (front side and rear side) than the place where the shaft receiving space sp is formed. The front and rear engaging holes 4f and 4r cooperate with the mounting tool G to mount the base part d2 relative to the side cover 3 in a state where the bottom side of the base part d2 is connected to the inner surface of the side cover 3.

Furthermore, the shapes of the base portion d2 near the front and rear engagement holes 4f and 4r, that is, the shapes of the front end portion and the rear end portion of the base portion d2, are formed to be visibly different from each other in order to facilitate the suppression of posture errors during installation work.

The front and rear shaft support parts 5f and 5r support both ends of the substantially cylindrical shaft e2 in a rotatable manner. The front and rear shaft support parts 5f and 5r include: left and right shaft support wall parts 51 and 52 arranged to be separated from each other on the left and right sides with the shaft receiving space sp between them, an upper shaft support wall part 53 connecting the upper ends of the left and right shaft support wall parts 51 and 52 in a manner facing the shaft receiving space sp on the lower side, and a fall-off prevention protrusion v protruding from the inner surface of the right shaft support wall part 52 toward the left shaft support wall part 51.

When the shaft e2 of the second binding tool component E is accommodated in the shaft accommodation space sp from the lower side of the base portion d2, it is prevented from falling off by the anti-falling protrusions v constituting the front and rear shaft support portions 5f and 5r, making it difficult to fall off from the shaft accommodation space sp.

The through hole M is formed by the left and right intermediate wall bodies 6 and 7 which are arranged to be separated from each other by the shaft receiving space sp, and the front and rear connecting parts 8 connecting the front and rear ends of the left intermediate wall body 6 and the right intermediate wall body 7.

A pressed engaging surface 61, 71 is provided in the middle portion in the front-rear direction of the left and right intermediate wall bodies 6, 7, and the pressed engaging surface is pressed by the protrusion t of the shaft portion e2 during the rotation of the second binding tool component E between the closed position (C) and the open position (P).

The left intermediate wall body 6 is supported in a cantilevered manner relative to the right intermediate wall body 71 via the front and rear connecting parts 7.

[The first ring components d1(f) and d1(r) at the front and rear] The first ring components d1(f) and d1(r) at the front and rear are partially ring-shaped and extend from the base d2. The front ends of the first ring components d1(f) and d1(r) at the front and rear are provided with a locking claw x1 in a direction facing each other. That is, the front end of the first ring component d1(f) at the front is provided with a locking claw x1 in a manner that faces inward (rear), and the front end of the first ring component d1(r) at the rear is provided with a locking claw x1 in a manner that faces inward (front).

<Second binder member E> The second binder member E is integrally formed of a synthetic resin. The second binder member E is rotatably supported relative to the first binder member D.

The second binding tool component E has: an axis portion e2, which is rotatably supported relative to the base portion d2; and front and rear second ring forming portions e1(f), e1(r), which are integrally extended from the axis portion e2 to form front and rear binding rings R(f), R(r).

[Shaft e2] The shaft e2 is a rod-shaped structure extending in the front-rear direction. At least the two ends of the shaft e2 in the longitudinal direction are cylindrical and can be rotatably engaged with the shaft support parts 5f and 5r in the front and rear directions.

A convex portion t is integrally provided in the middle portion in the longitudinal direction of the shaft portion e2, protruding in a direction orthogonal to the axis s. The convex portion t can temporarily expand the separation width of the paired wall portions forming the through hole M, that is, the left and right intermediate wall portions 6 and 7, when the second binder component E changes from the closed position (C) to the open position (P).

That is, the separation width w8 of the left and right middle wall parts 6 and 7 of the second binder component E when it is in a posture between the closed posture (C) and the open posture (P), that is, in the intermediate posture (U) is longer than the separation width w7 of the left and right middle wall parts 6 and 7 of the second binder component E when it is in the closed posture (C) and the open posture (P).

The protrusions t are provided in pairs so as to protrude in opposite directions relative to the shaft portion e2. The protrusions t of the pair are provided on an imaginary straight line q perpendicular to the axis s of the shaft portion e2 so that the protruding ends t1 of the pair of protrusions t substantially coincide with each other.

A pair of protrusions t are formed so as to protrude from the shaft e2 in an inclined direction when the second binder member E is in a closed position (C) and an open position (P).

A pair of protrusions t are formed so as to protrude from the shaft portion e2 in a substantially horizontal direction when the second binder member E is in the intermediate position (U).

In this embodiment, the portion where the axis portion e2 and the convex portion t are provided is formed into a substantially lemon shape when viewed in cross section.

[Front and rear second ring components e1(f), e1(r)] The front and rear second ring components e1(f), e1(r) are partially ring-shaped components extending from the shaft e2. The front end portions of the front and rear second ring components e1(f), e1(r) are provided with engaging claws x2 protruding in opposite directions. That is, the front end portion of the front second ring component e1(f) is provided with an engaging claw x2 protruding outward (forward), and the front end portion of the rear second ring component e1(r) is provided with an engaging claw x2 protruding outward (rear).

The user uses his fingers to temporarily elastically deform the front and rear second ring components e1(f) and e1(r) in a direction of approaching each other, thereby disengaging the front end portions of the front and rear second ring components e1(f) and e1(r) from the front end portions of the front and rear first ring components d1(f) and d1(r). Then, by rotating the second binder component E relative to the first binder component D, the front and rear binding rings R(f) and R(r) in a closed position (C) can be changed in position toward an open position (P).

<<Mounting tool G>> The mounting tool G is used to mount the base portion d2 on the inner surface of the side cover 3. The mounting tool G is formed of a synthetic resin.

The mounting device G comprises: a mounting base g1 arranged on the outer side of the side cover 3, and an engaging protrusion g2 protruding from the mounting base g1, penetrating through a through hole 31 provided on the side cover 3 and engaging with front and rear engaging holes 4f and 4r formed on the base portion d2 as an engaging portion.

The mounting base g1 is connected to the outer surface of the side cover 3. The mounting base g1 is formed in a rectangular plate shape extending along the longitudinal direction of the side cover 3. The horizontal width w6 of the mounting base g1 is set to be shorter than the horizontal width w1 of the side cover 3.

The left and right side ends of the mounting base g1 are provided with notch portions g11 for avoiding interference with the front and rear second ring components e1 (f) and e1 (r) as the movable ring portion.

Furthermore, since the fixture G is formed in a bilaterally symmetrical shape, it can be properly engaged with the base portion d2 of the binder B even if it is reversed.

The engaging protrusion g2 is protruded toward both ends of the mounting base g1 in the longitudinal direction. The engaging protrusion g2 is composed of two claw portions g21 separated from each other. The front portions of the two claw portions g21 constituting the engaging protrusion g2 are formed with a non-return protrusion tk.

The two engaging protrusions g2 provided on the mounting base g1 are engaged with the engaging holes 4f and 4r formed on the front and rear sides of the base portion d2 of the binder B in a locked state.

Next, the operation of the stapler B when the front and rear binding rings R (f) and R (r) in the closed position (C) pass through the intermediate position (U) and change their positions to the open position (P) will be described.

First, when the front and rear binding rings R(f), R(r) are in the closed position (C), the engaging claws x1 of the front end portions of the front and rear first ring components d1(f), d1(r) and the engaging claws x2 of the front end portions of the front and rear second ring components e1(f), e1(r) engage with each other.

From this state, the user uses his fingers to disengage the engaging claws x1 and x2 in the engaged state, thereby temporarily elastically deforming the front and rear second ring structures e1(f) and e1(r) in a direction toward each other, and rotates the second binder component E having the front and rear second ring structures e1(f) and e1(r) relative to the first binder component D in a direction in which the engaging parts x1 and x2 are separated from each other in the left-right direction.

At this time, a pair of protrusions t provided on the shaft E2 can temporarily expand the separation width of the left and right intermediate wall parts 6 and 7 forming the through hole M during the process of the second binder component E changing from the closed position (C) to the intermediate position (U).

That is, the left middle wall body 6, which is cantilevered relative to the right middle wall body 7 via the front and rear connecting parts 8, is pressed by the convex part t when the posture is changed from the closed posture (C) to the middle posture (U), and can be temporarily elastically displaced in a direction away from the right middle wall body 5.

That is, the shaft portion e2 having a pair of protrusions t is pressed to push the left and right intermediate wall portions 6 and 7 outwards respectively during the process of the second binder component E changing from the closed position (C) to the intermediate position (U).

The pair of protrusions t protruding in the inclined direction in the closed position (C) are formed to protrude in the substantially horizontal direction in the intermediate position (U). The shaft e2 of the pair of protrusions t in the intermediate position (U) is longer in the horizontal direction than in the closed position (C). Therefore, the shaft e2 of the pair of protrusions t resists the elastic restoring force of the member that the left intermediate wall body 6 wants to return to the original position and presses the left intermediate wall body 6 outward, thereby temporarily expanding the separation distance between the left and right intermediate wall bodies 6 and 7.

From this state, when the shaft portion e2 having a pair of protrusions t further rotates, that is, when it rotates from the intermediate position (U) to the open position (P), the elastic restoring force of the left intermediate wall body 6 that wants to return to the original position presses the portion other than the top of the protrusion t on one side. The second binder component E that receives the elastic thrust is pushed in the open position (P) direction and rotates to the final open position (P).

After the above process, the second binder component E can adopt the open position (P) from the closed position (C) through the intermediate position (U), and can be stabilized in a difficult-to-return state in the final open position (P).

In addition, the second binder component E can be rotated from the open position (P) to the closed position (C) via the intermediate position (U) by utilizing the user's operating force to perform the reverse procedure of the above sequence.

As described above, the binder B of this embodiment comprises: a first binder component D having front and rear first ring structures d1(f), d1(r), and a second binder component E having front and rear second ring structures e1(f), e1(r), and is constructed so as to be able to adopt a closed posture (C) in which the front end portions of the front and rear first and second ring structures d1(f), d1(r), e1(f), e1(r) are engaged with each other, and an open posture (P) in which the front end portions of the front and rear first and second ring structures d1(f), d1(r), e1(f), e1(r) are separated.

Moreover, the first binding component D has a base portion d2, which is provided with a through hole M penetrating in the up and down directions, and the second binding component E has a protrusion t, which can temporarily expand the separation width of the left and right middle wall portions 6 and 7 that serve as a pair of wall portions forming the through hole M during the process of changing the posture from the closed posture (C) to the open posture (P).

Therefore, as long as it is this embodiment, a binder that can appropriately maintain the open posture of the binding ring can be provided.

That is, the convex portion t provided on the second binder member E can temporarily expand the separation width of the left and right intermediate wall portions 6 and 7 that form the through hole M during the process of changing the posture from the closed posture (C) to the open posture (P). Therefore, after the second binder member E reaches the open posture (P), the return to the closed posture (C) can be appropriately suppressed by the left and right intermediate wall portions 6 and 7.

The left and right intermediate wall bodies 6 and 7 are formed by pressing the protrusion t to form the through hole. Therefore, the elastic deformation of the left and right intermediate wall bodies 6 and 7 to expand the separation width is easily performed in a balanced manner, and a structure with excellent strength that can withstand repeated use is obtained.

The second binder member E includes: a shaft portion e2 rotatably supported relative to the base portion d2; and front and rear second ring components e1(f) and e1(r) extending integrally from the shaft portion e2. The shaft portion e2 is provided with a protrusion t.

Therefore, the convex portion t provided on the shaft portion e2 can temporarily expand the separation width of the left and right intermediate wall portions 6 and 7 forming the through hole M.

The base portion d2 includes a pair of shaft support portions 5f and 5r capable of rotatably supporting both end portions of the shaft portion e2, and a through hole M provided between the pair of shaft support portions 5f and 5r.

Therefore, the base portion d2 can not only support the shaft portion e2 rotatably, but also has a suitable structure for engaging with the protrusion t.

The first binder component D and the second binder component E are respectively formed of synthetic resin.

Therefore, the binder B is excellent in flexibility of elastic deformation, light weight, and freedom of design that can be formed into a complex shape.

The document folder of this embodiment includes: a cover A, and a binder B installed on the cover A.

Therefore, it is possible to provide a file folder with excellent workability in attaching and detaching the bound objects while properly maintaining the open position (P) of the front and rear binding rings R (f) and R (r).

The cover A includes a front cover 1, a bottom cover 2, and a side cover 3. The first binding member D is mounted on the inner side of the side cover 3 using a mounting tool G.

Therefore, since the first binding tool component D is located on the inner side of the side cover 3, the cover A can be properly positioned in a double-leaf position (H) on a placement surface such as a top plate.

The mounting device G includes a mounting base g1 located on the outer side of the side cover 3, and an engaging protrusion g2 protruding from the mounting base g1 and penetrating the side cover 3 and engaging with front and rear engaging holes 4f and 4r as engaging parts formed in the base portion d2.

Therefore, the mounting tool G can properly mount the base portion d2 of the binding tool B against the inner surface of the side cover 3.

In addition, the present invention is not limited to the embodiments described above.

The base of the first binder member may be provided with a recessed portion opening upward instead of a through hole penetrating in the up-down direction. Even with such a structure, the projection of the second binder member can temporarily expand the separation width of the paired wall portions forming the recessed portion, thereby achieving the desired purpose.

The first binder member and the second binder member are not limited to being able to rotate relative to each other. For example, the first binder member and the second binder member can be relatively displaced by sliding movement, so that the front ends of the first and second ring components are engaged with each other in a closed position and the front ends of the first and second ring components are separated in an open position.

The convex portion is not limited to being provided on the shaft portion. The convex portion only needs to be provided on the second binding tool member.

The shapes of the connecting holes of the front cover and the bottom cover can adopt various shapes and are not limited to those shown in the above-mentioned implementation forms.

The form in which the base of the binder is attached to the inner surface of the side cover can be adopted in an appropriate form. For example, the base can also be attached to the inner surface of the side cover using an adhesive instead of an attachment.

The mounting tool can be single, or can be more than two plural. In other words, one mounting tool can be used to mount two binders on the side cover of the cover, or more than two mounting tools can be used to mount one binder on the side cover of the cover.

The engaging protrusion may not be in a locked state with respect to the engaging portion.

The engaging portion is not limited to the engaging hole, and may be in any shape as long as it is a structure capable of engaging with the engaging protrusion.

The horizontal width of the side cover can also be set to be substantially the same as the horizontal width of the base.

The cover may also be a structure in which the outer surfaces of the front cover and the bottom cover cannot be folded so as to face each other.

In addition, the specific structure of each part is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention.

A: Cover 1: Front cover 2: Bottom cover 3: Side cover B: Binder D: First binder component E: Second binder component G: Mounting tool

[Figure 1] is a perspective view showing an embodiment of the present invention. [Figure 2] is a top view of the embodiment. [Figure 3] is a perspective view of the embodiment. [Figure 4] is a perspective view of the embodiment. [Figure 5] is a perspective view of the embodiment. [Figure 6] is a perspective view of the embodiment. [Figure 7] is an exploded perspective view of the embodiment. [Figure 8] is a cross-sectional view taken along line A-A of Figure 2. [Figure 9] is an exploded perspective view of the embodiment. [Figure 10] is an exploded perspective view of the embodiment. [Figure 11] is a cross-sectional view taken along line B-B of Figure 2. [Figure 12] is a cross-sectional view taken along line C-C of Figure 4. [Figure 13] is a cross-sectional view taken along line D-D of Figure 5. [Figure 14] is a left side view of the embodiment. [Figure 15] is a cross-sectional view taken along line E-E of Figure 14. [Figure 16] shows a cross-sectional view when the cover is folded (a cross-sectional view at the same cut point as Figure 15).

1: Front cover

2: Bottom cover

3: Side cover

6: Left middle wall body

7: Right middle wall body

8: Front and rear connection

11: Front cover body

12: Base end front cover

21: Bottom cover body

22: Base end bottom cover

61: Pressed engagement surface

71: Pressed engagement surface

A(H): Cover (front cover opened)

B(U): Binder (middle position)

cn: Middle hinge part

D: First binding component

d1(r): first ring component

d2: base part

E: Second binding component

e1(r): Second ring structure

e2: Orbital part

G:Mounting tools

g1: Mounting base

M: Through hole

N: Hinge

R(r): Rear binding ring

s: axis

sp: shaft storage space

t: convex part

t1: protruding end

w8: Split width

x1: snap-fit part

Claims (7)

A binder comprises: a first binder component provided with a first ring structure, and a second binder component provided with a second ring structure, and the binder can be configured to adopt a closed posture in which the front ends of the first and second ring structures are engaged with each other and an open posture in which the front ends of the first and second ring structures are separated, and the characteristics are as follows: The first binder component has a base portion, which is provided with a through hole penetrating in the up-down direction or a recessed portion opening in the upward direction, The second binder component has a convex portion that can temporarily expand the separation width of the paired wall portions forming the through hole or the recessed portion during the process of changing the posture from the closed posture to the open posture. As in claim 1, the second binder component comprises: a shaft portion rotatably supported relative to the base portion; and the second ring component integrally extending from the shaft portion, wherein the shaft portion is provided with the protrusion. As in claim 2, the base portion comprises: a pair of shaft support portions capable of rotatably supporting both end portions of the shaft portion, and the through hole or the recess provided between the pair of shaft support portions. As in claim 1, the binder, wherein the first binder component and the second binder component are respectively formed of synthetic resin. A document folder includes a cover and a binder described in any one of claim items 1 to 4 mounted on the cover. As in claim 5, the cover comprises: a front cover, a bottom cover, and a side cover, and the first binding member is mounted on the inner side of the side cover using a mounting device. As in claim 6, the aforementioned mounting device comprises: a mounting base located on the outer side of the aforementioned side cover, and a snap-fitting protrusion which protrudes from the mounting base, penetrates the aforementioned side cover, and snaps with a snap-fitting portion formed on the aforementioned base.